CN113385468A - Waste denitration catalyst cleaning system and cleaning method - Google Patents
Waste denitration catalyst cleaning system and cleaning method Download PDFInfo
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- CN113385468A CN113385468A CN202110746323.5A CN202110746323A CN113385468A CN 113385468 A CN113385468 A CN 113385468A CN 202110746323 A CN202110746323 A CN 202110746323A CN 113385468 A CN113385468 A CN 113385468A
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- denitration catalyst
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- 239000003054 catalyst Substances 0.000 title claims abstract description 123
- 238000004140 cleaning Methods 0.000 title claims abstract description 117
- 239000002699 waste material Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 14
- 210000000078 claw Anatomy 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005507 spraying Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides a cleaning system and a cleaning method for a waste denitration catalyst. The cleaning device comprises a cleaning tank, at least one supporting base plate used for supporting the waste denitration catalyst is arranged in the cleaning tank, a plurality of nozzles facing the bottom surface and the side surface of the waste denitration catalyst are distributed on the supporting base plate, the nozzles are communicated with a water supply device, and the control device is electrically connected with the nozzles to control the working pressure and/or the flow of the nozzles. The waste denitration catalyst cleaning system and the cleaning method provided by the invention have the advantages that the automation degree is high, the cleaning effect on the waste denitration catalyst is good, and the denitration effect of the cleaned denitration catalyst is excellent.
Description
Technical Field
The invention relates to the technical field of regeneration and recovery treatment of waste catalysts, in particular to a waste denitration catalyst cleaning system and a waste denitration catalyst cleaning method.
Background
The Selective Catalytic Reduction (SCR) technology is widely applied to the flue gas denitration process of coal-fired power plants. A great deal of air pollutants such as fine particles and SO are generated due to the combustion of coal2Nitrogen Oxide (NO)X) Etc. wherein NOXThe removal is usually carried out by selectively reacting with a reducing agent under the action of a denitration catalyst to generate nontoxic and pollution-free N2And H2And O. The denitration catalyst is influenced by the service life and generally needs to be replaced in 3-5 years, and the future generation of 15 ten thousand meters per year in China is expected3The waste denitration catalyst. However, the waste denitration catalyst is not only a pollutant (harmful component of heavy metal such as vanadium and tungsten), but also a resource, and can be reused through regeneration treatment.
Physical cleaning is an important ring in the regeneration process of the waste denitration catalyst. The physical cleaning refers to washing the deactivated waste denitration catalyst with water to remove impurities such as fly ash and the like covering the surface of the catalyst, so that the activity of the surface of the physically deactivated part of the catalyst is recovered. At present, the physics that uses at home and abroad is washed mostly to adopt the manpower to carry out the high-pressure squirt and washes, and this cleaning method is consuming time and wasting power, produces easily that sewage and mud pile up, and degree of automation is low, and is especially not good to the cleaning performance of old and useless denitration catalyst, can't guarantee denitration catalyst's used repeatedly effect.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a waste denitration catalyst cleaning system and a waste denitration catalyst cleaning method, which have the advantages of high automation degree, good cleaning effect on waste denitration catalysts and excellent denitration effect of the cleaned denitration catalysts.
The invention provides a waste denitration catalyst cleaning system which comprises a cleaning device and a control device, wherein the cleaning device comprises a cleaning tank, at least one supporting base plate used for supporting a waste denitration catalyst is arranged in the cleaning tank, a plurality of nozzles facing the bottom surface and the side surface of the waste denitration catalyst are distributed on the supporting base plate, the nozzles are communicated with a water supply device, and the control device is electrically connected with the nozzles to control the working pressure and/or flow of the nozzles.
Further, the outlet axis of the nozzle forms an angle of 90 degrees with the inlet axis, the spray area is circular, and the spray angle is 120 degrees.
Furthermore, a plurality of nozzles constitute a bottom surface spraying area for cleaning the bottom surface of the waste denitration catalyst and a side surface spraying area for cleaning the side surface of the waste denitration catalyst, the bottom surface spraying area is composed of a plurality of nozzles arranged in an array mode, the side surface spraying area is composed of a plurality of nozzles uniformly distributed in the circumferential direction of the supporting chassis, and the side surface spraying area is located on the periphery of the bottom surface spraying area.
Furthermore, the distance between adjacent nozzles in the bottom surface spraying area is 10-15 cm; the spacing between adjacent nozzles in the side spray zone is 10-30 cm.
Furthermore, an inclined plate is arranged in the cleaning tank, the inclined plate is obliquely arranged below the supporting chassis, and mud baffles are arranged at the middle part and the bottom of the inclined plate.
Furthermore, a reuse water foundation pit is also arranged in the cleaning tank and is arranged at the lower end of the inclined plate, and the reuse water foundation pit is communicated with the nozzle to reuse the cleaned water.
Further, the waste denitration catalyst cleaning system further comprises a lifting device used for moving the waste denitration catalyst to the supporting base plate, and the lifting device is provided with at least one lifting claw.
Furthermore, a splash guard is arranged at the opening end of the cleaning groove, the splash guard has an opening mode and a closing mode, and the control device is connected with the splash guard to control the splash guard to be opened or closed.
The invention also provides a waste denitration catalyst cleaning method, which is used for cleaning the waste denitration catalyst by adopting the waste denitration catalyst cleaning system and comprises the following steps: the waste denitration catalyst is placed on the supporting base plate, and the plurality of nozzles are started to clean the bottom surface and the side surface of the waste denitration catalyst.
Further, the working pressure of the nozzle during cleaning is 5-18MPa, the flow rate is 600-1800 liters/min, the cleaning time is 10-30 minutes, and the nozzle is kept stand for 5-15 minutes after cleaning.
The implementation of the invention has at least the following advantages:
1. according to the invention, the bottom surface and the side surface of the waste denitration catalyst are cleaned through the plurality of nozzles, so that the cleaning effect of the waste denitration catalyst is good, the denitration effect of the cleaned denitration catalyst is excellent, and the regeneration and the reuse of the waste denitration catalyst are facilitated;
2. according to the invention, the working pressure and/or flow of the nozzle are/is controlled by the control device, the automation degree of the whole cleaning operation is high, the defects of time and labor consumption caused by the traditional manual high-pressure water gun for washing are effectively overcome, and the comprehensive cleaning of the waste denitration catalyst is facilitated;
3. according to the invention, the inclined plate and the reuse water foundation pit are arranged, so that the cleaned water can be treated and reused, the accumulation of sewage and sludge is avoided, the energy is saved, the environment is protected, and the repeated utilization of water resources is realized.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a waste denitration catalyst cleaning system according to an embodiment of the present invention.
Description of reference numerals:
1: a cleaning tank; 2: a support chassis; 3: a support frame; 4: a nozzle; 5: a sloping plate; 6: a reuse water foundation pit; 7: a hoisting device; 8: a lifting claw; 9: a splash guard; 10: a bottom surface spray zone; 11: a side injection zone; 12: and (4) the ground.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, the waste denitration catalyst cleaning system of the present embodiment includes a cleaning device and a control device, the cleaning device includes a cleaning tank 1, at least one supporting base plate 2 for supporting the waste denitration catalyst is disposed in the cleaning tank 1, a plurality of nozzles 4 facing the bottom surface and the side surface of the waste denitration catalyst are distributed on the supporting base plate 2, the nozzles 4 are communicated with a water supply device (not shown), and the control device (not shown) is electrically connected to the nozzles 4 to control the working pressure and/or flow of the nozzles 4.
In the waste denitration catalyst cleaning system of the embodiment, the cleaning device is mainly used for cleaning the waste denitration catalyst; the cleaning device comprises a cleaning tank 1 which is a cleaning place for the waste denitration catalyst, the arrangement position and the size of the cleaning tank 1 are not strictly limited, and the cleaning tank can be reasonably arranged according to actual conditions. In one embodiment, sink 1 may be disposed below floor 12; further, the size of the cleaning tank 1 may be set to, for example, 10 meters (length) × 4 meters (width) × 2 meters (height).
The supporting base plate 2 is mainly used for supporting the waste denitration catalyst to be cleaned, and the arrangement number of the supporting base plates 2 and the arrangement mode in the cleaning tank 1 are not strictly limited; specifically, a plurality of support chassis 2, for example, 6, may be provided in the cleaning tank 1, so that it is convenient to clean a plurality of waste denitration catalysts at the same time, which is advantageous to improve the cleaning efficiency. A plurality of support chassis 2 can be arranged in washing tank 1 in multirow interval, and the rated load of support chassis 2 can be rationally set up according to actual need, for example 4 tons etc..
The supporting frame 3 can be arranged on the supporting chassis 2, so that the waste denitration catalyst can be conveniently fixed; the structure and the arrangement mode of the support frame 3 are not strictly limited, and the waste denitration catalyst can be conveniently fixed on the support chassis 2. Particularly, the support frame 3 can be detachably arranged on the support chassis 2, so that waste denitration catalyst modules with different sizes and specifications can be matched conveniently; specifically, the support frame 3 may be made of, for example, screw thread type stainless steel, and the height thereof may be adjusted by replacing the waste denitration catalyst module.
In addition, a lifting hydraulic device (not shown) can be installed at the bottom of the supporting chassis 2, and the lifting hydraulic device is used for adjusting the height of the supporting chassis 2, so that the waste denitration catalyst modules with different sizes and specifications are matched, and the applicability of the whole cleaning system is further improved.
The nozzle 4 is mainly used for cleaning the waste denitration catalyst, and the specific structure of the nozzle 4 is not strictly limited; preferably, the outlet axis of the nozzle 4 is at an angle of 90 degrees to the inlet axis, the spray area is circular, and the spray angle is 120 degrees; this nozzle 4 can produce solid toper spraying shape to guarantee under great pressure and flow rate that the liquid stream that can both distribute evenly in the whole injection region, improved the cleaning performance to old and useless denitration catalyst greatly. The working pressure of the nozzle 4 can be adjusted to 0-18MPa, and the flow can be adjusted to 0-1800L/min.
The plurality of nozzles 4 can constitute and be used for carrying out abluent bottom surface injection district 10 and be used for carrying out abluent side injection district 11 to the old and useless denitration catalyst side to the old and useless denitration catalyst bottom surface, and bottom surface injection district 10 comprises the nozzle 4 of a plurality of array arrangements, and side injection district 11 comprises a plurality of equipartitions in supporting chassis 2 circumference nozzle 4, and side injection district 11 is located the periphery of bottom surface injection district 10. It can be understood that, when cleaning, the bottom surface injection zone 10 is located under the bottom surface of the waste denitration catalyst, and the side surface injection zone 11 is located under the side surface of the waste denitration catalyst, so that the waste denitration catalyst can be cleaned comprehensively.
More specifically, the interval between the adjacent nozzles 4 in the floor spray zone 10 may be 10 to 15 cm, preferably cm; the spacing between adjacent nozzles 4 in the side spray zone 11 is 10-30 cm, preferably 20 cm. The research finds that: this mode of arranging can form effective and abundant washing to old and useless denitration catalyst, when guaranteeing the cleaning performance, can practice thrift the scavenging period and wash the water quantity.
Furthermore, an inclined plate 5 is arranged in the cleaning tank 1, the inclined plate 5 can be obliquely arranged below the supporting chassis 2, and mud baffles (not shown) are arranged at the middle part and the bottom part of the inclined plate 5; the sloping plate 5 and the mud baffle are mainly used for depositing impurities such as sludge in the cleaned water, thereby being convenient for recycling the cleaning water. Specifically, the inclined plate 5 can be a honeycomb-shaped inclined plate made of PP and PE copolymers, the horizontal pressure-bearing strength of the pipe orifice of the single-group inclined pipe is not less than 1.4KPa, and the single-group inclined pipe with the pressure-bearing deformation rate of the single-group inclined side surface bears 0.6 KPa; sludge below the inclined plate 5 needs to be cleaned regularly, and the cleaning interval is about 7-10 days.
In addition, still be equipped with reuse water foundation ditch 6 in washing tank 1, reuse water foundation ditch 6 sets up the lower extreme at swash plate 5, and reuse water foundation ditch 6 can communicate with nozzle 4 through the elevator pump in order to carry out retrieval and utilization and secondary cleaning to the water after the washing.
The waste denitration catalyst cleaning system of the embodiment may further include a lifting device 7 for moving the waste denitration catalyst to the support chassis 2, wherein the lifting device 7 has at least one lifting claw 8, for example, 4 lifting claws may be provided; the hoisting device 7 is not strictly limited, the hoisting device 7 can be a general double-beam bridge crane or the like, and the vertical rigidity of the hoisting device 7 can be 1/800; meanwhile, the lifting claw 8 can adopt an electro-hydraulic mechanical technology, the opening and closing of the lifting claw 8 can be remotely controlled by opening and closing a main oil cylinder electromagnetic valve, the lifting claw 8 can be made of high-hardness wear-resistant steel, in addition, the lifting claw 8 can adopt a hydraulic plum-blossom-shaped claw, the rated load of the hydraulic plum-blossom-shaped claw is 3 tons, and the grabbing height is 6 meters.
Further, a splash guard 9 may be further provided at the open end of the wash bowl 1 to prevent wash water from splashing out during the washing process. It can be understood that the splash guard 9 has an open and close mode, and when the waste denitration catalyst needs to be moved to the support chassis 2 of the cleaning tank 1, the splash guard 9 can be set to the open mode so as to facilitate the waste denitration catalyst to enter the cleaning tank 1; when the waste denitration catalyst needs to be cleaned, the splash guard 9 can be set to be in a closed mode to prevent the cleaning water from splashing out; the splatter shield 9 may be electrically connected to a control device for controlling the opening or closing of the splatter shield 9. The splash guard 9 may be made of glass fiber reinforced plastic, and the opening and closing manner thereof is not limited, for example, a folding opening and closing manner may be adopted, and at this time, the splash guard 9 may be unfolded in a translational manner and closed in a translational manner.
The cleaning system of this embodiment does not strictly limit the waste denitration catalyst module, and may be a honeycomb denitration catalyst or a triangular honeycomb catalyst, or a corrugated plate catalyst, etc.
According to the waste denitration catalyst cleaning system, the bottom surface and the side surface of the waste denitration catalyst are cleaned through the plurality of nozzles 4, the cleaning effect of the waste denitration catalyst is good, the denitration effect of the cleaned denitration catalyst is excellent, and the waste denitration catalyst is favorable for regeneration and reuse; meanwhile, the working pressure and/or flow of the nozzle 4 are/is controlled by the control device, the automation degree of the whole cleaning operation is high, the defects that the time and the labor are consumed when a high-pressure water gun is used for washing by traditional manpower are effectively overcome, and the comprehensive cleaning of the waste denitration catalyst is facilitated; in addition, through setting up swash plate 5 and reuse water foundation ditch 6 to can handle and the retrieval and utilization to the water after wasing, both avoid the pile up of sewage and mud, energy-concerving and environment-protective simultaneously has realized the reuse many times of water resource.
Example 2
The method for cleaning the waste denitration catalyst of the embodiment is to clean the waste denitration catalyst by using the waste denitration catalyst cleaning system of the embodiment 1, and the cleaning method includes: waste denitration catalysts are placed on the supporting base plate 2, and the bottom surfaces and the side surfaces of the waste denitration catalysts are cleaned by starting the plurality of nozzles 4.
More specifically, the method for cleaning the waste denitration catalyst of the embodiment includes the following steps:
1) opening the splash guard 9 of the cleaning tank 1, and enabling the splash guard to be unfolded in a translation mode;
2) forking the waste denitration catalyst module to the ground 12 beside the cleaning tank 1 by using a forklift, and starting a lifting claw 8 on a lifting device 7 to move the waste denitration catalyst module to the support frame 3; according to the requirement, the waste denitration catalyst modules can be cleaned for 1-6 times at one time;
3) closing the splash guard 9 above the cleaning tank 1;
4) starting the nozzles 4 on each supporting chassis 2 to clean the bottom and the side of the waste denitration catalyst, wherein the working pressure of the nozzles 4 is 5-18MPa, the flow rate is 600-1800 liters/min, and the cleaning time is 10-30 min;
5) after cleaning, standing the whole waste denitration catalyst module for 10 minutes to ensure that water on the catalyst module flows to the bottom of the cleaning tank 1 along with gravity;
6) and opening the splash guard 9 of the cleaning tank 1 again, moving the cleaned catalyst module to the ground 12 by using the lifting claws 8 on the lifting device 7, and transferring the catalyst module to be further processed by using a forklift.
Comparative example 1
The high-pressure water gun is adopted for washing by manpower, the working pressure of the nozzle is 5-18MPa, the flow rate is 600-1800 liters/min, and the washing time is 10-30 min.
Comparative example 2
With reference to example 2 except for the nozzle; the nozzle of this comparative example was: the outlet axis of the nozzle forms an angle of 180 degrees with the inlet axis, the spray area is circular, and the spray angle is 110 degrees.
Test examples
The method of example 2 and the method of comparative examples 1-2 are adopted to clean the waste denitration catalyst used for 3 years, and the cleaned denitration catalyst is regenerated and reused, and the recycling effect is shown in table 1.
TABLE 1 denitration Effect of denitration catalyst
| Denitration catalyst | Denitration efficiency (%) |
| Fresh denitration catalyst | 72.6 |
| Regenerated denitration catalyst of example 2 | 75.9 |
| Regenerated denitration catalyst of comparative example 1 | 50.4 |
| Comparative example 2 regenerated denitration catalyst | 62.1 |
As can be seen from Table 1:
the cleaning system and the cleaning method provided by the invention have the advantages that the regenerated denitration catalyst regenerated and reused is high in denitration efficiency, and the cleaning system and the cleaning method provided by the invention can be used for well cleaning the waste denitration catalyst, are good in cleaning effect, and further are beneficial to ensuring the denitration effect of the cleaned regenerated denitration catalyst.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a waste denitration catalyst cleaning system, its characterized in that, includes belt cleaning device and controlling means, and belt cleaning device includes the washing tank, is equipped with at least one support chassis that is used for supporting waste denitration catalyst in the washing tank, and it has a plurality of nozzles towards waste denitration catalyst bottom surface and side to distribute on supporting the chassis, nozzle and water supply installation intercommunication, controlling means and nozzle electric connection are in order to control the operating pressure and/or the flow of nozzle.
2. The waste denitration catalyst cleaning system of claim 1, wherein an outlet axis of the nozzle is at an angle of 90 degrees with an inlet axis, the spray area is circular, and the spray angle is 120 degrees.
3. The waste denitration catalyst cleaning system according to claim 1, wherein the plurality of nozzles constitute a bottom surface injection region for cleaning the bottom surface of the waste denitration catalyst and a side surface injection region for cleaning the side surface of the waste denitration catalyst, the bottom surface injection region is composed of a plurality of nozzles arranged in an array, the side surface injection region is composed of a plurality of nozzles uniformly distributed in the circumferential direction of the support chassis, and the side surface injection region is located at the periphery of the bottom surface injection region.
4. The waste denitration catalyst cleaning system of claim 3, wherein the distance between adjacent nozzles in the bottom surface spray zone is 10-15 cm; the spacing between adjacent nozzles in the side spray zone is 10-30 cm.
5. The waste denitration catalyst cleaning system according to claim 1, wherein an inclined plate is provided in the cleaning tank, the inclined plate is obliquely provided below the support base plate, and mud baffles are provided at the middle and bottom of the inclined plate.
6. The waste denitration catalyst cleaning system according to claim 5, wherein a reuse water foundation pit is further provided in the cleaning tank, the reuse water foundation pit is provided at a lower end of the inclined plate, and the reuse water foundation pit is communicated with the nozzle to reuse the cleaned water.
7. The spent denitration catalyst cleaning system according to claim 1, further comprising a lifting device for moving the spent denitration catalyst to the support chassis, the lifting device having at least one lifting claw.
8. The waste denitration catalyst cleaning system of claim 1, wherein a splash guard is provided at an opening end of the cleaning tank, the splash guard has an opening and closing mode, and the control device is connected with the splash guard to control the splash guard to open or close.
9. A waste denitration catalyst cleaning method is characterized in that the waste denitration catalyst cleaning system of any one of claims 1 to 8 is adopted to clean a waste denitration catalyst, and the cleaning method comprises the following steps: the waste denitration catalyst is placed on the supporting base plate, and the plurality of nozzles are started to clean the bottom surface and the side surface of the waste denitration catalyst.
10. The method for cleaning the waste denitration catalyst as claimed in claim 9, wherein the working pressure of the nozzle during cleaning is 5-18MPa, the flow rate is 600-1800 l/min, the cleaning time is 10-30 min, and the cleaning is followed by standing for 5-15 min.
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