CN118268249B - A selection by winnowing grading plant for dry process production high specific surface area calcium hydroxide - Google Patents
A selection by winnowing grading plant for dry process production high specific surface area calcium hydroxide Download PDFInfo
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- CN118268249B CN118268249B CN202410693678.6A CN202410693678A CN118268249B CN 118268249 B CN118268249 B CN 118268249B CN 202410693678 A CN202410693678 A CN 202410693678A CN 118268249 B CN118268249 B CN 118268249B
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- feeding
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 68
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 68
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000001035 drying Methods 0.000 title claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 99
- 238000012546 transfer Methods 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 abstract description 63
- 239000000843 powder Substances 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract description 4
- 238000011068 loading method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/08—Cleaning arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/06—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
A selection by winnowing grading plant for dry process production high specific surface area calcium hydrate relates to air current screening technical field, square base including the level setting is equipped with the primary screening feeding case respectively on the square base and changes the material middle case, and the primary screening feeding incasement is equipped with and rotates the primary screening subassembly, changes the material middle incasement and is equipped with the tee bend transfer pipe, is equipped with in the tee bend transfer pipe and carries the material loading subassembly, changes material middle case top and is equipped with the transfer connecting cylinder and wind selection classification case in proper order, is equipped with whirl acceleration subassembly in the transfer connecting cylinder, is equipped with centrifugal classification subassembly in the selection by winnowing classification case. The invention solves the problems of single classification effect, difficult separation of doped substances and inconvenient cleaning of residual calcium hydroxide powder when the wind power screening machine in the traditional technology is used for the calcium hydroxide winnowing classification of specific surface area.
Description
Technical Field
The invention relates to the technical field of airflow screening, in particular to a winnowing classification device for producing high-specific-surface-area calcium hydroxide by a dry method.
Background
Calcium hydroxide refers to a powdered product obtained by reacting quicklime with a defined amount of water, typically containing less than one percent free water.
The specific surface area of the calcium hydroxide refers to the total area of the calcium hydroxide with unit mass, and the calcium hydroxide with high specific surface area has the characteristics of porosity, high activity, good dispersibility, high utilization rate and the like, and is widely applied to the fields of medicine, synthesis of food additives, synthesis of high-technology biological materials, sewage treatment, flue gas desulfurization, denitration and the like.
In conclusion, the specific surface area is an important index for measuring the quality of calcium hydroxide.
At present, two production methods of calcium hydroxide with high specific surface area are mainly adopted, namely dry production and wet production, specifically, the wet production is that lime and water are subjected to digestion reaction under the condition that the mass ratio is more than 4, and then the materials are filtered, deslagged, dehydrated, dried and graded; the dry production is to mix lime and water or steam according to the equimolar ratio for digestion reaction, then to carry out air separation classification, and to remove impurities to reach the requirement of a certain granularity, and to package for sale; among them, the dry method for producing high specific surface area calcium hydroxide is widely used.
The calcium hydroxide obtained by dry production generally needs to be crushed, ground and refined by mechanical force so as to improve the specific surface area and activity, and the specific process flow comprises the following steps: adding the calcium hydroxide raw material into a high-speed stirrer, and fully stirring and grinding; delivering the stirred slurry into a spray dryer for spray drying; conveying the dried powder into a boiling bed for high-temperature sintering; and grinding and screening the sintered product to obtain the calcium hydroxide with high specific surface area.
Dry process for preparing high specific surface area the equipment of calcium hydroxide mainly comprises: the calcium hydroxide obtained after grinding by the pulverizer is difficult to unify particle fineness, so that the specific surface area and activity gap of the calcium hydroxide powder in the same batch are large, and the screening machine is needed to screen and classify the crushed calcium hydroxide products.
Because the powdery physical properties of calcium hydrate itself adopts the mode of air current screening when classifying more, and current wind-force screening machine is owing to structural defect, when being used for the selection by winnowing classification of specific surface area calcium hydrate, often can appear a series of problems, include:
1. The grading effect is single, and the complete screening of calcium hydroxide with different gradient specific surface areas cannot be realized.
2. Synchronous separation of mixed impurities in calcium hydroxide powder is difficult to realize in the screening process, and the quality of a high-specific-surface-area calcium hydroxide finished product is affected.
3. After the classification of winnowing is accomplished, remaining calcium hydroxide powder in the equipment easily takes place to pile up, and is inconvenient for the clearance, influences the continuous of follow-up separation process.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a winnowing classification device for producing high-specific-surface-area calcium hydroxide by a dry method, which is used for solving the problems that the classification effect is single, the mixing substances are difficult to separate and the residual calcium hydroxide powder is inconvenient to clean when a wind screening machine in the traditional technology is used for winnowing classification of the specific-surface-area calcium hydroxide.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A selection by winnowing grading plant for dry process production high specific surface area calcium hydrate, square base including the level setting, be equipped with the preliminary screening feeding case on the square base respectively and change the material intermediate box, be equipped with the rotation preliminary screening subassembly in the preliminary screening feeding case, it shifts the pipe to be equipped with the tee bend in the material intermediate box to change, be equipped with the transportation material loading subassembly in the tee bend shifts the pipe, it changes material intermediate box top and is equipped with transfer connecting cylinder and selection by winnowing grading box in proper order, be equipped with whirl accelerating assembly in the transfer connecting cylinder, be equipped with the centrifugation grading assembly in the selection by winnowing grading box.
As an optimized scheme, the rotational flow accelerating assembly comprises an air inlet volute, the air inlet volute is fixedly connected to the peripheral wall, close to the lower end, of the transit connecting cylinder, the air inlet volute is communicated with the transit connecting cylinder through a plurality of air inlets, two air inlet tail pipes are arranged on the air inlet volute, and a compression pump is respectively arranged on the outer end face of each air inlet tail pipe.
As an optimized scheme, the inner peripheral wall of the transit connecting cylinder is fixedly connected with a cross connecting frame, a vertical guide column is fixed on the cross connecting frame, and a spiral blade is fixedly connected on the outer peripheral wall of the guide column.
As an optimized scheme, the winnowing classification box is a square box with upper and lower openings, a horizontal cover plate is fixedly connected to the opening at the upper end of the winnowing classification box, and the lower end of the winnowing classification box is fixedly connected to the transit connecting cylinder.
As an optimized scheme, the centrifugal classification assembly comprises a centrifugal inner cylinder which is vertically lifted, wherein the upper end of the centrifugal inner cylinder is closed, the lower end of the centrifugal inner cylinder is opened, the lower end of the centrifugal inner cylinder is in a conical hopper-shaped gradually-expanding arrangement, and the conical hopper-shaped part of the centrifugal inner cylinder is tightly attached to the inner peripheral wall of the transfer connecting cylinder.
As an optimized scheme, a plurality of centrally symmetrical sorting openings are formed in the peripheral wall, close to the upper end, of the centrifugal inner cylinder, and arc-shaped screens are fixedly connected to each sorting opening respectively.
As an optimized scheme, the center of the upper surface of the horizontal cover plate is fixedly connected with a rotation driving motor, the tail end of an output shaft of the rotation driving motor downwards penetrates through the horizontal cover plate and is fixedly connected with a connecting shaft, the lower end of the connecting shaft downwards penetrates through the upper end face of the centrifugal inner cylinder and extends into the centrifugal inner cylinder, and the tail end of the connecting shaft is fixedly connected with a centrifugal rotating wheel.
As an optimized scheme, the peripheral wall of the transfer connecting cylinder is fixedly connected with a first-stage shunt pipe, the tail end of the first-stage shunt pipe extends in a forked shape, the first-stage shunt pipe is horizontally arranged and communicated with the transfer connecting cylinder, a vortex air pump is fixedly connected to the closed outer end face of the first-stage shunt pipe, a first bellows is fixedly connected to the peripheral wall of the transfer connecting cylinder, the first bellows and the first-stage shunt pipe are longitudinally and oppositely arranged, and a first centrifugal fan is arranged in the first bellows.
As an optimized scheme, a horizontal secondary flow dividing pipe is fixedly connected to the longitudinal outer wall of one side of the air separation classifying box, the shape and the structure of the secondary flow dividing pipe are the same as those of the primary flow dividing pipe, an electric air pump is fixedly connected to the closed outer end face of the secondary flow dividing pipe, a second air box is fixedly connected to the longitudinal outer wall of the other side of the air separation classifying box, and a second centrifugal fan is arranged in the second air box.
As an optimized scheme, the primary screening feeding box is a U-shaped box which is horizontally arranged, a hopper is fixedly connected to the upper surface of the primary screening feeding box, the lower end of the hopper is communicated with the primary screening feeding box, and two symmetrical swing sealing plates are hinged in an opening at the upper end of the hopper.
As an optimized scheme, a primary screening air box is fixedly connected to the transverse outer wall of one side of the primary screening feeding box, the primary screening air box is communicated with the primary screening feeding box, and a rotating fan is arranged in the primary screening air box.
As an optimized scheme, the rotary primary screening assembly comprises a stepping motor, wherein the stepping motor is fixedly connected to the transverse outer wall of the other side of the primary screening feeding box, a dust cover is arranged on the outer side of the stepping motor, and the dust cover is fixedly connected to the outer side wall of the primary screening feeding box.
As an optimized scheme, the output shaft of the stepping motor penetrates through the outer side wall of the primary screening feeding box and is fixedly connected with a horizontal rotating shaft, the other end of the horizontal rotating shaft is rotatably supported on the inner side wall of the primary screening feeding box, and a plurality of centrally symmetrical rotary turning plates are fixedly connected on the peripheral wall of the horizontal rotating shaft.
As an optimized scheme, the cleaning opening is formed in the lower half part of the primary screening feeding box, a transversely sliding arc-shaped sealing plate is arranged in the cleaning opening, the arc-shaped sealing plate is externally connected with a U-shaped connecting plate, the U-shaped connecting plate is arranged on one side of the primary screening feeding box, and an electric control telescopic cylinder is arranged between the U-shaped connecting plate and the primary screening feeding box.
As an optimized scheme, the vertical pipe part of the three-way transfer pipe upwards penetrates through the material transferring middle box and is fixedly connected and communicated to the transfer connecting cylinder, the horizontal pipe part of the three-way transfer pipe is a semi-communicating pipe with one end open and the other end closed, the horizontal open end of the three-way transfer pipe is fixedly connected with a diversion cone cover, and the diversion cone cover is arranged on the outer side of the dust cover and is fixedly connected to the outer side wall of the primary screening feeding box.
As an optimized scheme, a plurality of fan-shaped communication ports which are symmetrical in center are formed in the lateral side wall, close to one side of the diversion cone cover, of the primary screening feeding box, and primary screening nets are respectively fixed in the fan-shaped communication ports.
As an optimized scheme, the conveying and feeding assembly comprises a feeding conveying auger, a conveying driving motor is fixedly connected to the closed transverse outer end face of the three-way transfer pipe, and the tail end of an output shaft of the conveying driving motor extends into the three-way transfer pipe and is fixedly connected to the tail end of the feeding conveying auger.
As an optimized scheme, the bottom of the three-way transfer pipe is fixedly connected with a downward inclined discharging pipe, and the discharging pipe is arranged outside the material transferring middle box.
As an optimized scheme, the conveying and feeding assembly further comprises a feeding air box, wherein the feeding air box is fixedly connected to the outer bottom surface of the three-way transfer pipe and is arranged right opposite to the vertical pipe part of the three-way transfer pipe, and a feeding fan is arranged in the feeding air box.
As an optimized scheme, each transverse outer wall of the winnowing classifying box is respectively provided with a vertically extending sliding limiting opening, each sliding limiting opening is respectively provided with a lifting driving plate, one end of each lifting driving plate is fixedly connected to the outer peripheral wall of the centrifugal inner barrel, and the other end of each lifting driving plate extends to the outer part of each sliding limiting opening.
As an optimized scheme, each transverse outer wall of the winnowing classifying box is fixedly connected with a horizontal supporting plate respectively, the upper surface of each horizontal supporting plate is fixedly connected with a lifting telescopic cylinder respectively, and the upper telescopic end of each lifting telescopic cylinder is fixedly connected to the lower surface of the lifting driving plate.
As an optimized scheme, two transversely symmetrical clamping support frames are fixedly connected to the peripheral wall of the primary screening feeding box, and the lower ends of the two clamping support frames are fixedly connected to the upper surface of the square base respectively.
As an optimized scheme, each longitudinal outer wall of the material transferring middle box is fixedly connected with a vertical supporting plate, and the lower end of each vertical supporting plate is fixedly connected to the upper surface of the square base.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, the rotating primary screen assembly arranged in the primary screen feeding box can separate impurities contained in the calcium hydroxide powder before the calcium hydroxide powder is subjected to winnowing classification. Specifically, raw materials to be separated enter a primary screening feeding box through a hopper, then a stepping motor drives a horizontal rotating shaft to rotate, calcium hydroxide powder and impurities are simultaneously lifted by utilizing a rotating turning plate, high-pressure air flow is generated by rotating a rotating fan, the calcium hydroxide powder is blown to pass through a primary screening net and enter a diversion cone cover, the impurities are blocked by the primary screening net and remain in the primary screening feeding box, and in the subsequent cleaning process, the impurities are discharged from a cleaning port.
The three-way transfer pipe is internally provided with the conveying and feeding assembly, and the conveying and feeding assembly can realize automatic conveying and feeding of calcium hydroxide powder. Specifically, the calcium hydroxide powder entering into the diversion cone cover is firstly gathered at the transverse opening of the three-way transfer pipe, the conveying driving motor drives the feeding conveying auger to rotate, the calcium hydroxide powder can be transversely conveyed along the three-way transfer pipe, when the calcium hydroxide powder moves to the middle position of the three-way transfer pipe, the feeding fan is started, the feeding fan blows medium-grain and fine-grain calcium hydroxide powder upwards into the transit connecting cylinder, and coarse-grain calcium hydroxide powder is continuously conveyed transversely along the three-way transfer pipe and is discharged from the discharge pipe.
The rotational flow accelerating assembly is arranged in the transfer connecting cylinder, and the rotational flow accelerating assembly can perform secondary rotational flow lifting acceleration on the middle-grain and fine-grain calcium hydroxide powder after the middle-grain and fine-grain calcium hydroxide powder enters the transfer connecting cylinder. Specifically, the high-pressure air generated by the compression air pump flows through the air inlet tail pipe to enter the air inlet volute, enters the transfer connecting cylinder through the air inlet, forms circumferential surrounding air flow in the transfer connecting cylinder, and the annular air flow carries medium-grain and fine-grain calcium hydroxide powder to rise along the acceleration of the helical blade and enters the centrifugal inner cylinder.
The centrifugal classification assembly is arranged in the winnowing classification box, and can realize winnowing separation of medium-grain and fine-grain calcium hydroxide powder. Specifically, the rotation driving motor drives the centrifugal inner wheel to rotate, negative pressure is formed between the centrifugal inner cylinder and the air separation classifying box, so that fine calcium hydroxide powder passes through the arc screen, enters the air separation classifying box, remains in the centrifugal inner cylinder, and is discharged after being blown into the secondary flow dividing pipe through the wind power cooperation of the second centrifugal fan and the electric air pump; closing the compression air pump, adjusting the wind power of the feeding fan, slowly falling the middle-grain calcium hydroxide into the transfer connecting cylinder, and blowing the middle-grain calcium hydroxide powder in the transfer connecting cylinder into the first-stage shunt pipe through the wind power cooperation of the vortex air pump and the first centrifugal fan and then discharging.
According to the invention, after the air separation and classification are finished, the automatic cleaning of residual calcium hydroxide powder in the device is realized, the powder is prevented from being accumulated, and the influence on the subsequent use is avoided. Specifically, the automatically controlled flexible jar of control extends, makes the horizontal roll-off of arc closing plate, clears up the impurity that remains on the arc closing plate, and the extension of control lift flexible jar makes centrifugal inner tube rise to being in the classification incasement of selection by winnowing completely, and classification case and transfer connecting cylinder of selection by winnowing are in the intercommunication state this moment, and the slag charge landing that remains in the classification incasement of selection by winnowing originally is to three-way transfer intraductal to discharge from the discharge pipe after transversely carrying.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic cross-sectional view of the internal structure of the components of the present invention in a front view;
FIG. 2 is a schematic cross-sectional view of the internal structure of the components of the present invention in a side view;
FIG. 3 is a schematic cross-sectional view of the internal structure of the components of the present invention in a top view;
FIG. 4 is a schematic view of the external overall structure of the present invention in the front view;
FIG. 5 is a schematic view of the external overall structure of the present invention in a side view;
FIG. 6 is a schematic view of the exterior overall structure of the present invention in a top view;
FIG. 7 is a schematic cross-sectional view of the primary screening feed box and its internal structure in a side view in accordance with the present invention;
FIG. 8 is a schematic cross-sectional view of the internal structure of the spin-acceleration assembly of the present invention in a top view;
fig. 9 is a schematic cross-sectional view of the air classification box and its internal structure in a top view in the present invention.
In the figure: the centrifugal screen comprises a square base, a 2-primary screening feeding box, a 3-rotary middle box, a 4-three-way transfer pipe, a 5-transfer connecting cylinder, a 6-winnowing classifying box, a 7-hopper, an 8-swing sealing plate, a 9-primary screening air box, a 10-rotary fan, a 11-stepping motor, a 12-dust cover, a 13-horizontal rotating shaft, a 14-rotary turning plate, a 15-cleaning port, a 16-arc-shaped sealing plate, a 17-U-shaped connecting plate, a 18-electric telescopic cylinder, a 19-clamping support frame, a 20-diversion conical cover, a 21-fan-shaped connecting port, a 22-primary screening net, a 23-feed conveying auger, a 24-conveying driving motor, a 25-discharge pipe, a 26-feeding air box, a 27-feeding air box, a 28-air inlet spiral case, a 29-air inlet, a 30-air inlet tail pipe, a 31-compression air pump, a 32-cross connecting frame, a 33-guide column, a 34-spiral blade, a 35-primary shunt pipe, a 36-vortex air pump, a 37-first air box, a 38-first centrifugal fan, a 39-inner cylinder, a 40-centrifugal limit plate, a 41-sliding motor, a 41-sliding limit plate, a 42-sliding shaft, a 43-44-horizontal drive air box, a 45-horizontal drive fan, a second centrifugal fan, a 46-lifting limit plate, a 45-horizontal drive fan, a 46-lifting and a second-centrifugal fan, a 46-horizontal drive limit plate, a 45-sliding limit plate, a 43-sliding limit plate, a 42-sliding motor, a 43-lifting and a 45-lifting and a electric fan, a lifting and a magnetic-lifting and a supporting plate.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 9, a winnowing grading plant for producing high specific surface area calcium hydroxide by dry method, square base 1 including the level setting is equipped with the preliminary screening feeding case 2 respectively on the square base 1 and changes material middle case 3, is equipped with the rotation preliminary screening subassembly in the preliminary screening feeding case 2, is equipped with tee bend transfer pipe 4 in the material middle case 3 of changeing, is equipped with the transportation material loading subassembly in the tee bend transfer pipe 4, is equipped with transfer connecting cylinder 5 and winnowing grading case 6 in proper order above the material middle case 3 of changeing, is equipped with the whirl acceleration subassembly in the transfer connecting cylinder 5, is equipped with centrifugal grading subassembly in the winnowing grading case 6.
The primary screening feeding box 2 is a horizontally arranged U-shaped box, a hopper 7 is fixedly connected to the upper surface of the primary screening feeding box 2, the lower end of the hopper 7 is communicated with the primary screening feeding box 2, and two symmetrical swing sealing plates 8 are hinged in an opening at the upper end of the hopper 7.
A primary screening air box 9 is fixedly connected on the transverse outer wall of one side of the primary screening feeding box 2, the primary screening air box 9 is communicated with the primary screening feeding box 2, and a rotary fan 10 is arranged in the primary screening air box 9.
The rotary primary screening assembly comprises a stepping motor 11, wherein the stepping motor 11 is fixedly connected to the transverse outer wall of the other side of the primary screening feeding box 2, a dust cover 12 is arranged on the outer side of the stepping motor 11, and the dust cover 12 is fixedly connected to the outer side wall of the primary screening feeding box 2.
The output shaft of the stepping motor 11 penetrates through the outer side wall of the primary screening feeding box 2 and is fixedly connected with a horizontal rotating shaft 13, the other end of the horizontal rotating shaft 13 is rotatably supported on the inner side wall of the primary screening feeding box 2, and a plurality of centrally symmetrical rotary turning plates 14 are fixedly connected on the peripheral wall of the horizontal rotating shaft 13.
The cleaning mouth 15 has been seted up to the lower half of preliminary screening feeding case 2, is equipped with the arc closing plate 16 of horizontal slip in the cleaning mouth 15, and the external U-shaped connecting plate 17 of arc closing plate 16, one side of preliminary screening feeding case 2 is located to U-shaped connecting plate 17, is equipped with automatically controlled telescopic cylinder 18 between U-shaped connecting plate 17 and the preliminary screening feeding case 2.
Two transversely symmetrical clamping support frames 19 are fixedly connected to the peripheral wall of the primary screening feeding box 2, and the lower ends of the two clamping support frames 19 are fixedly connected to the upper surface of the square base 1 respectively.
The vertical pipe part of the three-way transfer pipe 4 upwards passes through the material transferring middle box 3 and is fixedly connected and communicated with the transfer connecting cylinder 5, the horizontal pipe part of the three-way transfer pipe 4 is a half-communicating pipe with one end open and the other end closed, the horizontal open end of the three-way transfer pipe 4 is fixedly connected with a diversion cone cover 20, and the diversion cone cover 20 is arranged on the outer side of the dust cover 12 and is fixedly connected on the outer side wall of the primary screening feeding box 2.
A plurality of fan-shaped communication ports 21 which are symmetrical in center are formed in the lateral side wall of the primary screening feeding box 2, which is close to one side of the diversion cone cover 20, and primary screening nets 22 are respectively fixed in each fan-shaped communication port 21.
The conveying and feeding assembly comprises a feeding conveying auger 23, a conveying driving motor 24 is fixedly connected to the closed transverse outer end face of the three-way transfer pipe 4, and the tail end of an output shaft of the conveying driving motor 24 extends into the three-way transfer pipe 4 and is fixedly connected to the tail end of the feeding conveying auger 23.
The bottom of the three-way transfer pipe 4 is fixedly connected with a downward inclined discharge pipe 25, and the discharge pipe 25 is arranged outside the transfer middle box 3.
The feeding and loading assembly further comprises a feeding air box 26, the feeding air box 26 is fixedly connected to the outer bottom surface of the three-way transfer pipe 4 and is arranged opposite to the vertical pipe part of the three-way transfer pipe 4, and a feeding fan 27 is arranged in the feeding air box 26.
The rotational flow accelerating assembly comprises an air inlet volute 28, the air inlet volute 28 is fixedly connected to the peripheral wall, close to the lower end, of the transfer connecting cylinder 5, the air inlet volute 28 is communicated with the transfer connecting cylinder 5 through a plurality of air inlets 29, two air inlet tail pipes 30 are arranged on the air inlet volute 28, and a compression air pump 31 is respectively arranged on the outer end face of each air inlet tail pipe 30.
The inner peripheral wall of the transfer connecting cylinder 5 is fixedly connected with a cross connecting frame 32, a vertical guide post 33 is fixed on the cross connecting frame 32, and a spiral blade 34 is fixedly connected on the outer peripheral wall of the guide post 33.
The outer peripheral wall of the transfer connecting cylinder 5 is fixedly connected with a first-stage shunt tube 35, the tail end of the first-stage shunt tube 35 extends in a forked shape, the first-stage shunt tube 35 is horizontally arranged and communicated to the transfer connecting cylinder 5, the sealing outer end face of the first-stage shunt tube 35 is fixedly connected with a vortex air pump 36, the outer peripheral wall of the transfer connecting cylinder 5 is fixedly connected with a first air box 37, the first air box 37 and the first-stage shunt tube 35 are longitudinally and oppositely arranged, and a first centrifugal fan 38 is arranged in the first air box 37.
The winnowing classifying box 6 is a square box with upper and lower openings, a horizontal cover plate 39 is fixedly connected to the opening of the upper end of the winnowing classifying box 6, and the lower end of the winnowing classifying box 6 is fixedly connected to the transit connecting cylinder 5.
The centrifugal classification assembly comprises a centrifugal inner cylinder 40 which is vertically arranged, wherein the upper end of the centrifugal inner cylinder 40 is closed, the lower end of the centrifugal inner cylinder 40 is opened, the lower end of the centrifugal inner cylinder 40 is gradually expanded in a cone bucket shape, and the cone bucket-shaped part of the centrifugal inner cylinder 40 is tightly attached to the inner peripheral wall of the transit connection cylinder 5.
The vertical sliding limiting openings 41 that extend are respectively arranged on each transverse outer wall of the winnowing classifying box 6, lifting driving plates 42 are respectively arranged in each sliding limiting opening 41, one ends of the lifting driving plates 42 are fixedly connected to the outer peripheral wall of the centrifugal inner cylinder 40, the other ends extend to the outer parts of the sliding limiting openings 41, horizontal supporting plates 43 are respectively fixedly connected on each transverse outer wall of the winnowing classifying box 6, lifting telescopic cylinders 44 are respectively fixedly connected on the upper surfaces of each horizontal supporting plate 43, and the upper telescopic ends of the lifting telescopic cylinders 44 are fixedly connected to the lower surfaces of the lifting driving plates 42.
A plurality of sorting openings 45 which are symmetrical in center are formed in the peripheral wall, close to the upper end, of the centrifugal inner cylinder 40, and an arc-shaped screen 46 is fixedly connected to each sorting opening 45.
The center of the upper surface of the horizontal cover plate 39 is fixedly connected with a rotation driving motor 47, the tail end of an output shaft of the rotation driving motor 47 downwards passes through the horizontal cover plate 39 and is fixedly connected with a connecting shaft 48, the lower end of the connecting shaft 48 downwards passes through the upper end face of the centrifugal inner cylinder 40 and extends into the centrifugal inner cylinder, and the tail end of the connecting shaft 48 is fixedly connected with a centrifugal rotating wheel 49.
The longitudinal outer wall of one side of the winnowing classification box 6 is fixedly connected with a horizontal secondary flow dividing pipe 50, the shape and the structure of the secondary flow dividing pipe 50 are the same as those of the primary flow dividing pipe 35, an electric air pump 51 is fixedly connected to the closed outer end surface of the secondary flow dividing pipe 50, a second air box 52 is fixedly connected to the longitudinal outer wall of the other side of the winnowing classification box 6, and a second centrifugal fan 53 is arranged in the second air box 52.
Each longitudinal outer wall of the material transferring middle box 3 is fixedly connected with a vertical supporting plate 54, and the lower end of the vertical supporting plate 54 is fixedly connected to the upper surface of the square base 1.
The invention is used when in use: firstly, high-specific-surface-area calcium hydroxide to be classified is put into a hopper 7, calcium hydroxide materials slide down into a primary screening feeding box 2 along the hopper 7, and the hopper 7 is closed by swinging a swinging sealing plate 8; starting a stepping motor 11, driving a horizontal rotating shaft 13 to rotate by the stepping motor 11, periodically lifting up calcium hydroxide materials positioned in a primary screening feeding box 2 by utilizing a rotating turning plate 14, starting a rotating fan 10, introducing flowing air into the primary screening feeding box 2, transversely blowing the lifted calcium hydroxide materials, leading the lifted calcium hydroxide materials to pass through a primary screening net 22, guiding the materials through a guiding conical cover 20, and then entering the inlet of a three-way transfer pipe 4, wherein impurities are blocked by the primary screening net 22 and remain in the primary screening feeding box 2; starting a conveying driving motor 24, and driving a feeding conveying auger 23 to rotate by the conveying driving motor 24 so as to transversely convey the primarily screened calcium hydroxide with high specific surface area; in the conveying process, a feeding fan 27 is started, the feeding fan 27 forms ascending air flow, high-specific-surface-area calcium hydroxide is blown into the transit connecting cylinder 5 along the vertical pipe part of the three-way transfer pipe 4, the high-specific-surface-area calcium hydroxide with the maximum granularity is continuously conveyed transversely along the three-way transfer pipe 4, and finally is discharged through the discharge pipe 25; respectively starting two compression air pumps 31, blowing compressed air from an air inlet tail pipe 30 by the compression air pumps 31, forming annular air flow in an air inlet volute 28, blowing out the annular air flow from an air inlet 29, further spirally accelerating after passing through a spiral blade 34, spirally lifting high-specific-surface-area calcium hydroxide, and enabling the calcium hydroxide to enter a centrifugal inner barrel 40; simultaneously starting a first centrifugal fan 38 and a vortex air pump 36, wherein the first centrifugal fan 38 and the vortex air pump 36 respectively generate opposite balanced air flows so as to prevent calcium hydroxide with high specific surface area from entering the primary shunt pipe 35; starting a rotary driving motor 47, driving a centrifugal rotating wheel 49 to rotate by the rotary driving motor 47 to form negative pressure, performing secondary classification screening through an arc screen 46, and pumping high-specific-surface-area calcium hydroxide with minimum granularity into the winnowing classification box 6 through the centrifugal inner barrel 40; starting a second centrifugal fan 53, controlling the electric air pump 51 to reversely rotate to generate suction force, and longitudinally discharging the high-specific-surface-area calcium hydroxide in the winnowing classification box 6 along the secondary flow dividing pipe 50; the compression air pump 31 is closed, the wind power of the feeding fan 27 is adjusted, the medium-granularity high-specific-surface-area calcium hydroxide slowly falls down, the vortex air pump 36 is closed, and the wind power generated by the first centrifugal fan 38 carries the medium-granularity high-specific-surface-area calcium hydroxide longitudinally and is discharged through the primary shunt pipe 35; after the classification of winnowing is finished, the device is automatically cleaned: the electric control telescopic cylinder 18 is controlled to stretch to enable the arc-shaped sealing plate 16 to transversely slide out, impurities reserved on the arc-shaped sealing plate 16 are cleaned, the lifting telescopic cylinder 44 is controlled to stretch to enable the centrifugal inner cylinder 40 to rise to be completely located in the winnowing classification box 6, at the moment, the winnowing classification box 6 and the transit connecting cylinder 5 are in a communicating state, slag materials originally remained in the winnowing classification box 6 slide into the three-way transfer pipe 4, and are discharged from the discharge pipe 25 after being transversely conveyed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with other technical solutions, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and all the modifications or replacements are included in the scope of the claims and the specification of the present invention.
Claims (4)
1. A selection by winnowing grading plant for dry process production high specific surface area calcium hydroxide, its characterized in that: the automatic feeding device comprises a square base (1) which is horizontally arranged, wherein a primary screening feeding box (2) and a material transferring middle box (3) are respectively arranged on the square base (1), a rotary primary screening assembly is arranged in the primary screening feeding box (2), a three-way transfer pipe (4) is arranged in the material transferring middle box (3), a conveying feeding assembly is arranged in the three-way transfer pipe (4), a transfer connecting cylinder (5) and a winnowing grading box (6) are sequentially arranged above the material transferring middle box (3), a rotational flow accelerating assembly is arranged in the transfer connecting cylinder (5), and a centrifugal grading assembly is arranged in the winnowing grading box (6);
The rotational flow accelerating assembly comprises an air inlet volute (28), the air inlet volute (28) is fixedly connected to the peripheral wall, close to the lower end, of the transit connecting cylinder (5), the air inlet volute (28) is communicated with the transit connecting cylinder (5) through a plurality of air inlets (29), two air inlet tail pipes (30) are arranged on the air inlet volute (28), and a compression air pump (31) is respectively arranged on the outer end face of each air inlet tail pipe (30);
A cross connecting frame (32) is fixedly connected to the inner peripheral wall of the transfer connecting cylinder (5), a vertical guide column (33) is fixedly arranged on the cross connecting frame (32), and a spiral blade (34) is fixedly connected to the outer peripheral wall of the guide column (33);
The air classification box (6) is a square box with upper and lower openings, a horizontal cover plate (39) is fixedly connected to the opening of the upper end of the air classification box (6), and the lower end of the air classification box (6) is fixedly connected and communicated with the transit connecting cylinder (5);
The centrifugal classification assembly comprises a centrifugal inner cylinder (40) which is vertically lifted, wherein the upper end of the centrifugal inner cylinder (40) is closed, the lower end of the centrifugal inner cylinder is opened, the lower end of the centrifugal inner cylinder (40) is gradually expanded in a cone hopper shape, and the cone hopper-shaped part of the centrifugal inner cylinder (40) is tightly attached to the inner peripheral wall of the transfer connecting cylinder (5);
A plurality of centrally symmetrical sorting openings (45) are formed in the peripheral wall, close to the upper end, of the centrifugal inner cylinder (40), and an arc-shaped screen (46) is fixedly connected to each sorting opening (45);
A rotary driving motor (47) is fixedly connected to the center of the upper surface of the horizontal cover plate (39), the tail end of an output shaft of the rotary driving motor (47) downwards penetrates through the horizontal cover plate (39) and is fixedly connected with a connecting shaft (48), the lower end of the connecting shaft (48) downwards penetrates through the upper end face of the centrifugal inner cylinder (40) and extends into the centrifugal inner cylinder, and a centrifugal rotating wheel (49) is fixedly connected to the tail end of the connecting shaft (48);
The primary screening feeding box (2) is a horizontally arranged U-shaped box, a hopper (7) is fixedly connected to the upper surface of the primary screening feeding box (2), the lower end of the hopper (7) is communicated with the primary screening feeding box (2), and two symmetrical swing sealing plates (8) are hinged in an opening at the upper end of the hopper (7);
A primary screening air box (9) is fixedly connected to the transverse outer wall of one side of the primary screening feeding box (2), the primary screening air box (9) is communicated with the primary screening feeding box (2), and a rotary fan (10) is arranged in the primary screening air box (9);
The rotary primary screening assembly comprises a stepping motor (11), the stepping motor (11) is fixedly connected to the transverse outer wall of the other side of the primary screening feeding box (2), a dust cover (12) is arranged on the outer side of the stepping motor (11), and the dust cover (12) is fixedly connected to the outer side wall of the primary screening feeding box (2);
An output shaft of the stepping motor (11) penetrates through the outer side wall of the primary screening feeding box (2) and is fixedly connected with a horizontal rotating shaft (13), the other end of the horizontal rotating shaft (13) is rotatably supported on the inner side wall of the primary screening feeding box (2), and a plurality of rotary turning plates (14) which are symmetrical in center are fixedly connected on the peripheral wall of the horizontal rotating shaft (13);
The vertical pipe part of the three-way transfer pipe (4) upwards passes through the material transferring middle box (3) and is fixedly connected and communicated with the transfer connecting cylinder (5), the horizontal pipe part of the three-way transfer pipe (4) is a semi-communicating pipe with one end open and the other end closed, the horizontal open end of the three-way transfer pipe (4) is fixedly connected with a diversion cone cover (20), and the diversion cone cover (20) is arranged on the outer side of the dust cover (12) and is fixedly connected on the outer side wall of the primary screening feeding box (2);
A plurality of fan-shaped communication ports (21) which are symmetrical in center are formed in the lateral side wall, close to one side of the diversion cone cover (20), of the primary screening feeding box (2), and primary screening nets (22) are respectively fixed in each fan-shaped communication port (21);
The novel centrifugal fan is characterized in that a first-stage shunt tube (35) is fixedly connected to the peripheral wall of the transfer connecting tube (5), the tail end of the first-stage shunt tube (35) extends in a forked shape, the first-stage shunt tube (35) is horizontally arranged and communicated to the transfer connecting tube (5), a vortex air pump (36) is fixedly connected to the closed outer end face of the first-stage shunt tube (35), a first air box (37) is fixedly connected to the peripheral wall of the transfer connecting tube (5), the first air box (37) and the first-stage shunt tube (35) are longitudinally arranged oppositely, and a first centrifugal fan (38) is arranged in the first air box (37);
A horizontal secondary flow dividing pipe (50) is fixedly connected to the longitudinal outer wall of one side of the air separation classifying box (6), the shape and the structure of the secondary flow dividing pipe (50) are the same as those of the primary flow dividing pipe (35), an electric air pump (51) is fixedly connected to the closed outer end surface of the secondary flow dividing pipe (50), a second air box (52) is fixedly connected to the longitudinal outer wall of the other side of the air separation classifying box (6), and a second centrifugal fan (53) is arranged in the second air box (52);
The conveying and feeding assembly comprises a feeding conveying auger (23), a conveying driving motor (24) is fixedly connected to the closed transverse outer end face of the three-way transfer pipe (4), and the tail end of an output shaft of the conveying driving motor (24) extends into the three-way transfer pipe (4) and is fixedly connected to the tail end of the feeding conveying auger (23);
the bottom of the three-way transfer pipe (4) is fixedly connected with a downward-inclined discharging pipe (25), and the discharging pipe (25) is arranged outside the transfer middle box (3);
A vertically extending sliding limit opening (41) is respectively formed in each transverse outer wall of the winnowing classification box (6), a lifting drive plate (42) is respectively arranged in each sliding limit opening (41), one end of each lifting drive plate (42) is fixedly connected to the outer peripheral wall of the centrifugal inner cylinder (40), and the other end of each lifting drive plate extends to the outside of each sliding limit opening (41);
horizontal supporting plates (43) are fixedly connected to each transverse outer wall of the winnowing classification box (6) respectively, lifting telescopic cylinders (44) are fixedly connected to the upper surfaces of the horizontal supporting plates (43) respectively, and the upper telescopic ends of the lifting telescopic cylinders (44) are fixedly connected to the lower surfaces of the lifting driving plates (42).
2. The air classification device for dry production of high specific surface area calcium hydroxide according to claim 1, wherein: the utility model discloses a cleaning device for a primary screening feeding box, including primary screening feeding box (2), cleaning opening (15) has been seted up to the latter half of primary screening feeding box (2), be equipped with transversely gliding arc closing plate (16) in cleaning opening (15), external U-shaped connecting plate (17) of arc closing plate (16), U-shaped connecting plate (17) are located one side of primary screening feeding box (2), U-shaped connecting plate (17) with be equipped with automatically controlled telescopic cylinder (18) between primary screening feeding box (2).
3. The air classification device for dry production of high specific surface area calcium hydroxide according to claim 1, wherein: the conveying and feeding assembly further comprises a feeding air box (26), the feeding air box (26) is fixedly connected to the outer bottom surface of the three-way transfer pipe (4) and is arranged right against the vertical pipe part of the three-way transfer pipe (4), and a feeding fan (27) is arranged in the feeding air box (26).
4. The air classification device for dry production of high specific surface area calcium hydroxide according to claim 1, wherein: two transversely symmetrical clamping support frames (19) are fixedly connected to the peripheral wall of the primary screening feeding box (2), and the lower ends of the two clamping support frames (19) are fixedly connected to the upper surface of the square base (1) respectively;
Each longitudinal outer wall of the material transferring middle box (3) is fixedly connected with a vertical supporting plate (54) respectively, and the lower end of each vertical supporting plate (54) is fixedly connected to the upper surface of the square base (1).
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| MX168010B (en) * | 1987-01-06 | 1993-04-28 | Felipe Salete | IMPROVED PROCEDURE TO OBTAIN HIGH PURITY PLANTOGO MUCILAGO PSYLLIUM |
| US8813967B2 (en) * | 2012-05-02 | 2014-08-26 | Alstom Technology Ltd | Adjustable mill classifier |
| CN108392929B (en) * | 2018-04-24 | 2023-12-15 | 中国石油大学(北京) | separation device |
| CN117380540B (en) * | 2023-12-12 | 2024-03-22 | 山东寿光第一建筑有限公司 | Fine sand screening plant for civil engineering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204710715U (en) * | 2015-06-10 | 2015-10-21 | 嵊州市联丰粉碎设备有限公司 | A kind of ultra micro rice gas flow sizing machine being applied to dust removing |
| CN117861828A (en) * | 2024-03-11 | 2024-04-12 | 山东红点新材料有限公司 | Superfine pulverizer for isostatic pressing graphite aggregate coke grinding |
| CN117920584A (en) * | 2024-03-19 | 2024-04-26 | 山东华信工业科技有限公司 | A air current formula raw materials screening grading plant for carborundum ceramic preparation |
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