CN114408585B - A gas-solid uniform distribution device for a conveying pipeline - Google Patents
A gas-solid uniform distribution device for a conveying pipeline Download PDFInfo
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- CN114408585B CN114408585B CN202210080541.4A CN202210080541A CN114408585B CN 114408585 B CN114408585 B CN 114408585B CN 202210080541 A CN202210080541 A CN 202210080541A CN 114408585 B CN114408585 B CN 114408585B
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- pipeline
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- straight tube
- solid particles
- fan
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- 239000007787 solid Substances 0.000 title claims abstract description 51
- 238000009827 uniform distribution Methods 0.000 title claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 36
- 238000012937 correction Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000001629 suppression Effects 0.000 claims abstract 4
- 230000002401 inhibitory effect Effects 0.000 claims description 14
- 238000005452 bending Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/526—Adaptations of pipes or tubes with means for special treatment to facilitate transport
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
- B65G53/4608—Turnable elements, e.g. rotary wheels with pockets or passages for material
- B65G53/4616—Turnable elements, e.g. rotary wheels with pockets or passages for material with axis of turning parallel to flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明公开了一种输送管线气固均匀分布装置，包括：直筒管、旋转抑制叶片组和至少两个偏斜矫正叶片组；其用于安装在弯折管线的出口端，并接收和输送由气流带动的固体颗粒；固体颗粒从弯折管线随空气流通至直筒管后，先通过旋转抑制叶片组降低弯折管线形成的气流旋转程度，再通过数个偏斜矫正叶片组降低固体颗粒在管线中偏斜分布程度。此结构使用成本低，实施或改造难度低，效果显著。通过旋转抑制叶片组和数个偏斜矫正叶片组的组合作用，不仅改善了弯折输送管道带来的固体颗粒偏转问题，使管线长距离输送以及管路弯折作用导致的固体颗粒在管线中分布不均问题得到有效改善，利于后续工程工序的进行。
The present invention discloses a gas-solid uniform distribution device for a conveying pipeline, comprising: a straight tube, a rotation suppression blade group and at least two skew correction blade groups; the device is used to be installed at the outlet end of a bent pipeline, and to receive and convey solid particles driven by an airflow; after the solid particles flow from the bent pipeline to the straight tube along with the air, the rotation suppression blade group is used to reduce the degree of rotation of the airflow formed by the bent pipeline, and then several skew correction blade groups are used to reduce the degree of skew distribution of the solid particles in the pipeline. This structure has low use cost, low implementation or modification difficulty, and significant effect. Through the combined action of the rotation suppression blade group and several skew correction blade groups, not only the deflection problem of solid particles caused by the bent conveying pipeline is improved, but also the problem of uneven distribution of solid particles in the pipeline caused by long-distance pipeline transportation and pipeline bending is effectively improved, which is beneficial to the subsequent engineering procedures.
Description
Technical Field
The invention relates to the field of industrial manufacturing production. In particular to a gas-solid uniform distribution device for a conveying pipeline.
Background
Two-phase flow using gas as carrier and solid particles as carried object is widely used in industrial production, and is commonly used in fluidized bed, drying process, coal powder burner of large power station, etc. The gas and solid particle transportation mainly relates to heat and mass transfer and chemical reaction between gas and solid particles, wherein the uniform distribution characteristic of the solid particles in a gas carrier is an important performance of the gas and solid transportation process. However, in the actual production process, the conditions of long-distance transportation of the pipeline, bending of the pipeline and the like cause that solid particles are inevitably subjected to the deflection action of gravity and centrifugal force, so that the solid particles are unevenly distributed in the pipeline, and the downstream physicochemical process is adversely affected.
For example, as the primary air pipeline carrying pulverized coal particles is bent, pulverized coal is greatly deflected to the outer side of the bent pipe after passing through the bent pipe, and when the outer side direction is exactly consistent with the rotation direction of the flame of the inscribed circle of the tangential boiler, a great amount of pulverized coal deflected to the outer side is greatly flushed to the water-cooled wall, so that the coking and slagging degree of the water-cooled wall is aggravated, and the safe and economic operation of the boiler is not facilitated.
Therefore, it is a problem that a person skilled in the art needs to solve how to provide an adjustment device that improves the phenomenon of deflection and maldistribution of solid particles during transport.
Disclosure of Invention
The invention aims to provide a conveying pipeline gas-solid uniform distribution device for improving deflection and maldistribution of solid particles in a conveying process.
In order to achieve the above object, the present invention provides a gas-solid uniform distribution device for a conveying pipeline, comprising: the device is used for being arranged at the outlet of the bending pipeline and conveying solid particles in the bending pipeline and is characterized by comprising a straight tube, wherein a rotation inhibiting blade group and at least two deflection correcting blade groups are sequentially arranged in the straight tube along the axial direction of the straight tube;
the rotation inhibiting blade set is used for reducing the rotation degree of the air flow in the bending pipeline;
The deflection correcting blade group is used for uniformly distributing solid particles in the conveying process.
Optionally, the rotation-inhibiting vane set includes: a plurality of vane plates extending along the axial direction of the straight tube, and all the vane plates are crossed with the central axis of the straight tube;
And the angle between any two adjacent blade plates is set to ensure that the blade plates are uniformly arranged along the circumferential direction of the straight bobbin.
Optionally, the number of the blade plates is set to 3-24; and the length of any blade plate in the tangential direction of the straight tube is set to be 0.2-1.0 times of the diameter of the straight tube.
Optionally, the skew correcting blade group includes: the fan-shaped blades are uniformly distributed along the circumferential direction, and a space is arranged between any two adjacent fan-shaped blades.
Optionally, the fan blades each contract in the conveying direction of the solid particles.
Optionally, for any two adjacent skew correcting blade sets: wherein one group of fan-shaped blades is arranged at intervals corresponding to the other group of fan-shaped blades.
Alternatively, the number of fan-shaped blades of a single skew correction blade group is set to 6 to 24.
Optionally, the skew correcting blade group is fixed inside the straight bobbin by a leeward rib plate.
Compared with the background art, the invention is provided with a straight tube, a rotation inhibiting blade group and at least two deflection correcting blade groups; the device is used for being arranged at the outlet end of the bending pipeline and receiving and conveying solid particles driven by air flow; after the solid particles circulate to the straight tube along with air from the bending pipeline, the rotation degree of air flow formed by the bending pipeline is reduced by the rotation inhibiting blade group, and the deflection distribution degree of the solid particles in the pipeline is reduced by the deflection correcting blade groups. The structure has low use cost, low implementation or transformation difficulty and remarkable effect. Through the combined action of the preposed rotation inhibiting blade group and the plurality of deflection correcting blade groups, the problem that solid particles are unevenly distributed in a pipeline due to long-distance pipeline conveying and pipeline bending actions is effectively solved. Compared with the prior art, the deflection problem of the solid particles caused by bending the conveying pipeline is improved, the solid particles are further and uniformly distributed, and the follow-up engineering process is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas-solid uniform distribution device for a conveying pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic view of a rotation inhibiting vane assembly according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a rotation-inhibiting vane pack provided in an embodiment of the present invention;
FIG. 4 is a schematic view of a blade set for skew correction according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a skew correction blade assembly according to an embodiment of the present invention;
fig. 6 is an assembly diagram of a gas-solid uniform distribution device for a conveying pipeline according to an embodiment of the present invention.
Wherein:
1-straight tube, 2-rotation suppressing blade group, 3-deflection correcting blade group, 4-blade plate and 5-fan blade.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present invention.
Referring to fig. 1 of the specification, fig. 1 is a schematic structural diagram of a gas-solid uniform distribution device of a conveying pipeline according to an embodiment of the present invention, including: a straight bobbin 1, a rotation suppressing blade group 2, and at least two skew correcting blade groups 3. The device is used for being arranged at the outlet end of the bending pipeline and receiving and conveying solid particles driven by air flow; after the solid particles circulate to the straight tube 1 along with air from the bending pipeline, the rotation degree of air flow formed by the bending pipeline is reduced by the front rotation inhibiting blade set 2, and the deflection distribution degree of the solid particles in the pipeline is reduced by the deflection correcting blade sets 3.
The conveying pipeline gas-solid uniform distribution device is arranged at the outlet of the bent pipeline or at the pipeline inlet where the procedure of uniformly distributing solid particles in gas is required, the installation mode is flange connection or welding according to pressure and temperature resistance, the device can be arranged by welding or not only pressure-bearing pipelines or leakage-proof process pipelines, the pipeline with larger conveying load fluctuation can be flange connection, and the device is not limited to the installation modes and can be changed according to practical conditions, and the device is not expanded again.
The invention has low use cost, low implementation or transformation difficulty and remarkable effect. The combination effect of the front rotation inhibiting blade group 2 and the plurality of deflection correcting blade groups 3 effectively improves the problem that solid particles are unevenly distributed in the pipeline caused by long-distance pipeline conveying and pipeline bending. Compared with the prior art, the deflection problem of the solid particles caused by bending the conveying pipeline is improved, the solid particles are further and uniformly distributed, and the follow-up engineering process is facilitated.
Further, referring to fig. 2 and 3 of the specification, fig. 2 is a schematic structural diagram of a rotation suppressing blade set according to an embodiment of the present invention, and fig. 3 is a cross-sectional view of a rotation suppressing blade set according to an embodiment of the present invention, including: the above-mentioned rotation suppressing vane assembly 2 includes a plurality of vane plates 4 extending along the axial direction of the straight bobbin 1, the axes intersecting at the middle of all vane plates 4 are collinear with the central axis of the straight bobbin 1, and a certain angle is provided between any two adjacent vane plates 4 to ensure that the vane plates 4 are uniformly distributed along the circumferential direction as a whole, thereby making the passing rotational air flow restricted to a certain extent, weakening its rotational inertia, and finally achieving the effect of solid particle rotation.
Further, the rotation inhibiting vane group 2 is researched and tested to obtain that the optimal number range of the vane plates 4 is limited within 3-24; and the length of any blade plate 4 along the tangential direction of the straight tube 1 is set to be 0.2-1.0 times of the tube diameter of the straight tube 1. In this range, the optimum effect is achieved, and the rotation degree of the air flow formed by the bending pipeline is reduced.
Further, referring to fig. 4 of the specification and fig. 5 of the specification, fig. 4 is a schematic structural diagram of a skew correcting blade group according to an embodiment of the present invention, and fig. 5 is a cross-sectional view of a skew correcting blade group according to an embodiment of the present invention, including: the deflection correction blade group 3 is composed of fan-shaped blades 5 with a certain interval in the same circle, the interval included angle between the fan-shaped blades 5 is consistent with the angle alpha occupied by a single fan-shaped blade 5 in the circumference, and the fan-shaped blades 5 in the same group are contracted to a certain extent along the solid granularity conveying direction so as to play a role in guiding and centralizing.
Further, the number of the above-mentioned skew correction blade groups 3 arranged in the pipeline conveying direction is not less than 2 groups, and the mounting orientations of the front and rear adjacent two groups of skew correction blade groups 3 need to be rotated by α degrees in the axial direction.
Further, the above-mentioned deflection correction blade group 3 has been studied and tested to obtain that the optimum number range of the fan-shaped blades 5 is limited within 6-24, and the optimum action effect is achieved by setting in this range, so that the uniform dispersion effect of the solid particles is optimum.
Further, the skew correction blade group 2 may be fixed in the straight pipe 1 by selecting a leeward rib plate.
As shown in fig. 6 of the specification, fig. 6 is an assembly diagram of a conveying pipeline gas-solid uniform distribution device according to an embodiment of the present invention, including: the following is an example of a primary air pulverized coal conveying pipeline of a 1000MW utility boiler. The primary air pulverized coal conveying pipeline in the present embodiment is a multi-directional bending pipeline (the present embodiment is exemplified by a forward and a downward bending pipeline). Before the equipment is installed, due to the centrifugal effect of a plurality of bent pipes in a plurality of directions, on one hand, the pulverized coal and the air flow form rotary flow in a pipeline, and on the other hand, the pulverized coal is also caused to deviate to the outer side of the bent pipe elbow in the pipeline, so that the burnout characteristic and the pollution and slagging characteristic of the pulverized coal in a boiler furnace in the follow-up process are influenced. Suitable devices are needed to uniformly distribute the pulverized coal in the pipeline after passing through the bent pipe.
The device in the embodiment is composed of a straight tube 1, a rotation inhibiting blade group 2, a front deflection correcting blade group 3, a rear deflection correcting blade group 3 and a blade fixing reinforcing rib plate. The installation mode of the device in the original pipeline adopts welding or flange connection, and the installation position is the outlet of the bent pipe. According to structural optimization verification, the device adopts the following configuration scheme, and the effect of uniform distribution of pulverized coal particles is better. The number of the vane plates 4 arranged in the circumferential direction is 6, and the length of the vane plates 4 in the pipeline direction is 0.5 times the pipeline diameter. The front and rear deflection correcting blade groups 3 are composed of fan-shaped blades 5 which are arranged in the same circle and are separated by a certain distance, and the included angle of the distance between the fan-shaped blades 5 is consistent with the angle alpha=20 degrees occupied by the single fan-shaped blade 5 in the circumference. The installation orientation of the front fan-shaped blade 5 and the rear fan-shaped blade 5 rotates 20 degrees along the axial direction, and the fixing mode of the deflection correction blade group 3 in the pipeline is that a leeward rib plate is fixed. The number of the fan-shaped blades 5 of the same circle of deflection correcting blade group 3 is 9.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The gas-solid uniform distribution device for the conveying pipeline provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210080541.4A CN114408585B (en) | 2022-01-24 | 2022-01-24 | A gas-solid uniform distribution device for a conveying pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210080541.4A CN114408585B (en) | 2022-01-24 | 2022-01-24 | A gas-solid uniform distribution device for a conveying pipeline |
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| CN114408585A CN114408585A (en) | 2022-04-29 |
| CN114408585B true CN114408585B (en) | 2024-11-12 |
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| CN202210080541.4A Active CN114408585B (en) | 2022-01-24 | 2022-01-24 | A gas-solid uniform distribution device for a conveying pipeline |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115507377A (en) * | 2022-09-30 | 2022-12-23 | 北京天地融创科技股份有限公司 | Flow equalizing device and pulverized coal furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4934284A (en) * | 1989-02-27 | 1990-06-19 | Nitz Mark G | Coal distribution cone for pulverized coal burners |
| CN108204601A (en) * | 2017-12-21 | 2018-06-26 | 北京博奇电力科技有限公司 | Two-stage adjusts gas-particle two-phase fluidic distributor |
| WO2020013148A1 (en) * | 2018-07-09 | 2020-01-16 | 三菱日立パワーシステムズ株式会社 | Solid fuel burner |
| CN113669723A (en) * | 2021-08-18 | 2021-11-19 | 哈尔滨锅炉厂有限责任公司 | Powder homogenizing device for eliminating powder deviation effect of coal powder pipeline elbow |
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| CN114408585A (en) | 2022-04-29 |
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