CN114580229B - Design method of bag type dust collector air inlet structure and bag type dust collector air inlet structure - Google Patents
Design method of bag type dust collector air inlet structure and bag type dust collector air inlet structure Download PDFInfo
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- CN114580229B CN114580229B CN202111562338.2A CN202111562338A CN114580229B CN 114580229 B CN114580229 B CN 114580229B CN 202111562338 A CN202111562338 A CN 202111562338A CN 114580229 B CN114580229 B CN 114580229B
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- 239000000428 dust Substances 0.000 title claims abstract description 69
- 238000013461 design Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 20
- 238000004088 simulation Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000010586 diagram Methods 0.000 claims description 18
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004422 calculation algorithm Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000004454 trace mineral analysis Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
- B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
- G06T17/205—Re-meshing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Theoretical Computer Science (AREA)
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Abstract
The invention discloses an optimization design method of an air inlet structure of a bag type dust collector, which comprises the following steps: based on actual large bag type dust removing equipment, establishing a geometric model by using CAD software; carrying out gradient structure design on an air inlet of the bag type dust collector; and establishing a finite element analysis model by using HYPERMESH software. Numerical simulation calculation of the flow state inside the device is carried out in commercial CFD software Ansys Fluent, and the problems of uniformity of gas flow inside the bag filter device and the like are analyzed; and obtaining a square hole air inlet gradient structure of the bag type dust collector with uniform and better gas flow through comparison analysis simulation results. The invention also provides an air inlet structure of the bag type dust collector.
Description
Technical Field
The invention relates to a dust remover, in particular to a bag type dust remover.
Background
The bag-type dust collector is a common dust collecting device and comprises a closed shell, a filter bag arranged in the shell, an ash bucket communicated with the shell and the like, and the working principle is that dust-containing gas enters the shell from a flue gas inlet on the shell, then firstly enters the ash bucket, and a part of coarser dust particles and condensed dust clusters directly fall down due to inertia effect to play a role of pre-dust collection. The air flow entering the ash bucket is turned upwards and then flows into the inside of the shell, and when the air flow passes through the filter bag, dust is blocked on the outer surface of the filter bag. The purified gas enters a clean room which is arranged at the upper part of the filter bag and is formed by the inner wall of the shell, and then is collected to a smoke outlet of the shell for discharge.
Therefore, the air inlet of the bag house is a very important component, and how to improve the efficiency of the air inlet is an important problem in designing the air inlet structure.
Disclosure of Invention
The invention aims to solve the main technical problem of providing an optimal design method of an air inlet structure of a bag type dust collector, which performs optimal design in a software simulation mode.
In order to solve the technical problems, the invention provides an optimal design method of an air inlet structure of a bag type dust collector, which comprises the following steps:
1) Constructing a three-dimensional sheet model of the bag filter by using modeling UG software, wherein the three-dimensional sheet model comprises an air inlet, an air inlet grid plate, an ash bucket, a filter bag, a flower plate, a catalytic layer and an air outlet;
2) Carrying out gradient structure design on an air inlet grid plate of the bag type dust collector:
21 The air inlet structure is designed into two air inlet structures of a square hole channel and a round hole channel, and the air inlet diameter of the air inlet structure is a through hole with 700 mm;
22 Then respectively establishing a bag type dust collector geometric model of an air inlet structure with square hole air inlets uniformly distributed in a 10x 10 matrix, a bag type dust collector geometric model of an air inlet structure with square hole air inlets distributed in a gradient manner with decreasing number from bottom to top, a bag type dust collector geometric model of an air inlet structure with round hole air inlets uniformly distributed in a 10x 10 matrix, and a bag type dust collector geometric model of an air inlet structure with round hole air inlets distributed in a gradient manner with decreasing number from bottom to top;
3) Leading the established four bag-type dust collector geometric models into finite element preprocessing software HYPERMESH, and performing trace processing, triangle two-dimensional meshing and tetrahedral fluid meshing in HYPERMESH to obtain four bag-type dust collector finite element analysis models;
4) Using Ansys Fluent software to respectively endow material parameters and apply boundary conditions to four finite element analysis models of bag dust removal; describing turbulent flow of air flow in the dust remover by using a k-epsilon realizable turbulence model, wherein a filter bag is set as a porous jump boundary, an inlet is a speed inlet, an outlet is a pressure outlet, and a wall surface is a non-slip wall surface boundary condition;
5) Solving a coupled continuous equation and a momentum equation by using a pressure-speed coupled SIMPLE algorithm, wherein the discrete mode of each equation keeps the default setting of software; carrying out internal flow field analysis and calculation on the four finite element analysis models for bag type dust removal to obtain a particle flow trace diagram, a velocity distribution cloud diagram and a pressure distribution cloud diagram;
6) And carrying out airflow trace analysis through a trace diagram of an internal area of the finite element analysis model of the bag type dust collection, observing the flowing state and the trace of each part of fluid in the area, comparing the numerical simulation results of the finite element analysis models of the bag type dust collection with different structures, and selecting an air inlet structure of the bag type dust collector with good airflow distribution uniformity.
The invention also provides an air inlet structure of the bag type dust collector, which is in square hole gradient distribution.
The invention also provides an air inlet structure of the bag type dust collector, and the porosity of the air inlet grid plate is 50%.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
The invention provides an optimal design method of an air inlet structure of a bag type dust collector, which can simulate the variable porosity of the air inlet of the bag type dust collector by using a software simulation mode, thereby finding the optimal porosity.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the present invention;
Fig. 2 shows numerical simulation results of a bag type dust collector with air inlets uniformly distributed in a 10 x 10 matrix, air inlet channels in a square hole air inlet structure and filter bags in 750 pieces; figures (a) - (c) are particle flow trace diagrams, velocity profile cloud and pressure profile cloud of the bag house, respectively;
FIG. 3 shows the numerical simulation results of a bag collector with 750 filter bags, wherein the number of the air inlets of the square holes is gradually decreased from bottom to top, the air inlets of the square holes are distributed in a gradient manner, the air inlets of the square holes are in a square hole air inlet structure; figures (d) - (f) are particle flow trace diagrams, velocity distribution cloud and pressure distribution cloud of the bag house, respectively;
Fig. 4 shows numerical simulation results of a bag type dust collector with air inlets uniformly distributed in a 10 x 10 matrix, air inlet channels with round hole air inlet structures and 750 filter bags; figures (g) - (i) are particle flow trace diagrams, velocity profile cloud and pressure profile cloud, respectively, for a bag house.
FIG. 5 shows the numerical simulation result of a bag collector with round hole air inlets with gradually decreasing number from bottom to top, round hole air inlets in the air inlet channel, and 750 filter bags; and (j) - (l) are respectively a particle flow trace diagram, a velocity distribution cloud diagram and a pressure distribution cloud diagram of the bag filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," configured to, "" engaged with, "" connected to, "and the like are to be construed broadly, and may be, for example," connected to, "wall-mounted," connected to, removably connected to, or integrally connected to, mechanically connected to, electrically connected to, directly connected to, or indirectly connected to, through an intermediary, and may be in communication with each other between two elements, as will be apparent to those of ordinary skill in the art, in view of the detailed description of the terms herein.
Referring to fig. 1 to 5, the embodiment provides an optimization design method of an air inlet structure of a bag filter, which includes the following steps:
1) Constructing a three-dimensional sheet model of the bag filter by using modeling UG software, wherein the three-dimensional sheet model comprises an air inlet, an air inlet grid plate, an ash bucket, a filter bag, a flower plate, a catalytic layer and an air outlet;
2) Carrying out gradient structure design on an air inlet grid plate of the bag type dust collector:
21 The air inlet structure is designed into two air inlet structures of a square hole channel and a round hole channel, and the air inlet diameter of the air inlet structure is a through hole with 700 mm;
22 Then respectively establishing a bag type dust collector geometric model of an air inlet structure with square hole air inlets uniformly distributed in a 10x 10 matrix, a bag type dust collector geometric model of an air inlet structure with square hole air inlets distributed in a gradient manner with decreasing number from bottom to top, a bag type dust collector geometric model of an air inlet structure with round hole air inlets uniformly distributed in a 10x 10 matrix, and a bag type dust collector geometric model of an air inlet structure with round hole air inlets distributed in a gradient manner with decreasing number from bottom to top;
3) Leading the established four bag-type dust collector geometric models into finite element preprocessing software HYPERMESH, and performing trace processing, triangle two-dimensional meshing and tetrahedral fluid meshing in HYPERMESH to obtain four bag-type dust collector finite element analysis models;
4) Using Ansys Fluent software to respectively endow material parameters and apply boundary conditions to four finite element analysis models of bag dust removal; describing turbulent flow of air flow in the dust remover by using a k-epsilon realizable turbulence model, wherein a filter bag is set as a porous jump boundary, an inlet is a speed inlet, an outlet is a pressure outlet, and a wall surface is a non-slip wall surface boundary condition;
5) Solving a coupled continuous equation and a momentum equation by using a pressure-speed coupled SIMPLE algorithm, wherein the discrete mode of each equation keeps the default setting of software; carrying out internal flow field analysis and calculation on the four finite element analysis models for bag type dust removal to obtain a particle flow trace diagram, a velocity distribution cloud diagram and a pressure distribution cloud diagram;
6) And carrying out airflow trace analysis through a trace diagram of an internal area of the finite element analysis model of the bag type dust collection, observing the flowing state and the trace of each part of fluid in the area, comparing the numerical simulation results of the finite element analysis models of the bag type dust collection with different structures, and selecting an air inlet structure of the bag type dust collector with good airflow distribution uniformity. The bag type dust collector air inlet structure with good air flow distribution uniformity is a bag type dust collector air inlet structure with square holes distributed in a gradient mode, the air flow of the bag type dust collector air inlet structure is uniformly distributed in most places, and the flow inside the device tends to be stable.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (1)
1. The optimal design method of the air inlet structure of the bag type dust collector is characterized by comprising the following steps:
1) Constructing a three-dimensional sheet model of the bag filter by using modeling UG software, wherein the three-dimensional sheet model comprises an air inlet, an air inlet grid plate, an ash bucket, a filter bag, a flower plate, a catalytic layer and an air outlet;
2) Carrying out gradient structure design on an air inlet grid plate of the bag type dust collector:
21 The air inlet structure is designed into two air inlet structures of a square hole channel and a round hole channel, and the air inlet diameter of the air inlet structure is a through hole with 700 mm;
22 Then respectively establishing a bag type dust collector geometric model of an air inlet structure with square hole air inlets uniformly distributed in a 10x 10 matrix, a bag type dust collector geometric model of an air inlet structure with square hole air inlets distributed in a gradient manner with decreasing number from bottom to top, a bag type dust collector geometric model of an air inlet structure with round hole air inlets uniformly distributed in a 10x 10 matrix, and a bag type dust collector geometric model of an air inlet structure with round hole air inlets distributed in a gradient manner with decreasing number from bottom to top;
3) Leading the established four bag-type dust collector geometric models into finite element preprocessing software HYPERMESH, and performing trace processing, triangle two-dimensional meshing and tetrahedral fluid meshing in HYPERMESH to obtain four bag-type dust collector finite element analysis models;
4) Using Ansys Fluent software to respectively endow material parameters and apply boundary conditions to four finite element analysis models of bag dust removal; describing turbulent flow of air flow in the dust remover by using a k-epsilon realizable turbulence model, wherein a filter bag is set as a porous jump boundary, an inlet is a speed inlet, an outlet is a pressure outlet, and a wall surface is a non-slip wall surface boundary condition;
5) Solving a coupled continuous equation and a momentum equation by using a pressure-speed coupled SIMPLE algorithm, wherein the discrete mode of each equation keeps the default setting of software; carrying out internal flow field analysis and calculation on the four finite element analysis models for bag type dust removal to obtain a particle flow trace diagram, a velocity distribution cloud diagram and a pressure distribution cloud diagram;
6) And carrying out airflow trace analysis through a trace diagram of an internal area of the finite element analysis model of the bag type dust collection, observing the flowing state and the trace of each part of fluid in the area, comparing the numerical simulation results of the finite element analysis models of the bag type dust collection with different structures, and selecting an air inlet structure of the bag type dust collector with good airflow distribution uniformity.
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| CN202111562338.2A CN114580229B (en) | 2021-12-20 | 2021-12-20 | Design method of bag type dust collector air inlet structure and bag type dust collector air inlet structure |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209662840U (en) * | 2019-01-24 | 2019-11-22 | 太原市龙蓝环保设备有限公司 | A kind of pulse dust removal bag dust collector air inlet current equalizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2814168Y (en) * | 2005-05-19 | 2006-09-06 | 国电环境保护研究所 | Low-pressure pluse bag dust cleaner |
| CN2805889Y (en) * | 2005-06-29 | 2006-08-16 | 西安热工研究院有限公司 | Even airflow type static bag combined dust collector |
| CN101371960A (en) * | 2008-05-27 | 2009-02-25 | 综合能源有限公司 | New use of cloth bag dust collection method and device thereof |
| CN101905106A (en) * | 2010-08-08 | 2010-12-08 | 北京北科欧远科技有限公司 | Bag-type dust remover based on gradient reducing design |
| CN105912745A (en) * | 2016-03-24 | 2016-08-31 | 安徽威达环保科技股份有限公司 | Bag dust filter air distribution multi-parameter optimization method |
| CN210751908U (en) * | 2019-10-16 | 2020-06-16 | 四川比耐斯管业有限公司 | Special dust pelletizing system of application equipment |
| CN110801692A (en) * | 2019-11-28 | 2020-02-18 | 界首市利能环保技术开发有限公司 | Ash bucket mechanism for environment-friendly bag type dust collector |
| CN214182230U (en) * | 2021-01-06 | 2021-09-14 | 四川鸿源环保科技有限公司 | Reverse-blowing induced-draft internal-filtration big cloth bag negative pressure dust removal system for smoke treatment of submerged arc furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209662840U (en) * | 2019-01-24 | 2019-11-22 | 太原市龙蓝环保设备有限公司 | A kind of pulse dust removal bag dust collector air inlet current equalizer |
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