CN110124430B - Dry-wet hybrid intelligent dust removal experiment system - Google Patents
Dry-wet hybrid intelligent dust removal experiment system Download PDFInfo
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- CN110124430B CN110124430B CN201910426446.3A CN201910426446A CN110124430B CN 110124430 B CN110124430 B CN 110124430B CN 201910426446 A CN201910426446 A CN 201910426446A CN 110124430 B CN110124430 B CN 110124430B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- 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
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- 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
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- Filtering Of Dispersed Particles In Gases (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract
The invention discloses a dry-wet mixed intelligent dust removal experiment system, and relates to the field of various industrial dust removal devices. The experiment system mainly comprises a powder feeding system, a wet dust removal system and a dry dust removal system, wherein the powder feeding system can continuously provide experiment dust for the system, a dust concentration sensor transmits a monitored dust concentration value to a PC (personal computer) end, and then a signal is transmitted to a vibration frequency controller to adjust the powder feeding rate. For a wet dust removal system, dusty airflow rapidly enters an air inlet, micron-level fog drops generated by an ultrasonic atomizing nozzle perform pre-aggregation on fine and small particles in the dusty airflow, then monitoring signals are transmitted to a nozzle group to adjust the atomizing rate, and the dust airflow after pre-aggregation treatment is subjected to secondary trapping through a dry dust removal system. The change rule of the operation performance of the dry-wet mixed type dust removal system is tested by adjusting parameters such as the filtering speed, the particle size, the dust concentration and the like.
Description
Technical Field
The invention relates to the field of various industrial dust removal equipment such as coal power plants and coal mines, in particular to a dry-wet hybrid intelligent dust removal experiment system.
Background
Most industrial and mining enterprises can generate a large amount of dust in the production process, and the national occupational disease report issued by the national health council shows that: by the end of 2017, 85.41 thousands of national industrial and mining pneumoconiosis diseases are accumulated, 22701 new pneumoconiosis cases are added in 2017, the percentage of new occupational diseases is up to 84.84%, and the safety production of enterprises is seriously threatened. Therefore, dust prevention and control in industrial and mining enterprises are important fields requiring innovation and innovation.
In recent years, pulse pleated filter cartridge dust collectors have gained more and more application in dust prevention and control in mining industries by virtue of the advantages of large filtering area, high filtering precision, large air handling capacity and the like, but the characteristic of fiber filtration is difficult to be applied to filtration of toxic and harmful dust-containing gas. The ultrasonic water mist dust suppression technology is widely applied to the industries of energy, chemical engineering, coal and the like in China at present, can be suitable for effectively filtering high-temperature and high-toxicity dust-containing gas, and has high total dust removal efficiency but low capture efficiency on fine particles with small particle sizes. Therefore, a dust removal experimental device which can be applied to different working conditions is urgently needed, and the existing dust removal technology is improved by carrying out a large number of experiments.
Disclosure of Invention
The invention aims to provide a dry-wet hybrid intelligent dust removal experiment system, which fills the gap of the dry-wet hybrid dust removal field at home and abroad at present, can effectively utilize the advantages of a dry dust removal technology and a wet dust removal technology, and can also carry out experimental research on the operation performance of the dry dust removal technology and the wet dust removal technology by using different filter speeds, particle sizes, dust concentrations and other influence factors, so as to optimize the structural parameters of the dust removal equipment of the same type.
The technical solution comprises:
a dry-wet hybrid intelligent dust removal experiment system comprises a powder feeding system, a wet dust removal system and a dry dust removal system. The powder feeding system comprises a vibration frequency controller and a particle grading vibration sieve;
the wet dust removal system comprises a wet dust removal air cylinder and a particle characteristic monitoring system, wherein the wet dust removal air cylinder consists of an air inlet, a water filling port, an ultrasonic atomizing nozzle group, an axial flow fan and a filter screen. The wet dust removal air cylinder is provided with a junction box for starting the fan;
the dry dust removal system comprises a pulse type filter cartridge dust remover and a pulse pressure intelligent measurement and control system, wherein the pulse type filter cartridge dust remover comprises a filter cartridge, a variable frequency fan, an upper box body, a lower box body, an ash bucket and the like. The inside of the upper box body is provided with a pulse blowing ash removal device and an air outlet, and the air outlet is connected with the variable frequency fan. The bottom of last box be provided with the apron, through the apron with box links to each other down, lower box inside be the clean room, the ash bucket sets up the bottom at the clean room. In order to observe the thickness of the condensed dust layer on the filter cartridge, a laser sensor is arranged on the side wall of the lower box body.
As a preferred scheme of the invention, the particle grading vibration sieve screens and grades materials by the exciting force generated by the vibration motor, the maximum screening mesh number is 600 meshes, 7 materials with different particle sizes can be screened, and the experimental requirements under different particle sizes are realized.
The vibration frequency controller adjusts the dust concentration of the experimental device by controlling the powder feeding speed.
The dedusting air duct body adopts a multi-section detachable structure, so that the dedusting air duct is easy to maintain and clean.
The upper and lower parts of the wet-type dust removal air duct body are respectively provided with two groups of ultrasonic nozzle groups, the nozzle groups adopt hydromechanics type ultrasonic atomizing nozzles, the generated micron-sized fog drops can enable the interior of the wet-type dust removal air duct to reach a saturated dry fog state, and in addition, the fog inlet mode can be changed by adjusting the angle of the nozzles.
Furthermore, a particle characteristic monitoring system is further arranged on the wet-type dust removal air duct, and the particle characteristic monitoring system mainly comprises two Doppler laser particle size testers arranged on the wet-type dust removal air duct and respectively arranged at the front end and the rear end of the air duct. The particle characteristic monitoring system mainly utilizes a laser scattering principle to transmit signals to a PC (personal computer) end, adopts a PID (proportion integration differentiation) algorithm taking the required dry fog particle size as a target, and controls a nozzle group to adjust the atomization rate through a PLC (programmable logic controller) control module to generate effective dry fog. The dry fog is efficiently and continuously generated through real-time monitoring and automatic control, and the experimental amount of the fog-powder ratio in the air duct is achieved through dynamic tracking.
The pulse type filter cartridge dust remover is internally provided with three replaceable pleated filter cartridges with the outer diameter of 450mm, the inner diameter of 260mm and the length of 600mm, secondary dust removal is realized by utilizing the efficient dust removal function of the filter cartridges, and in addition, the experimental requirements can be met by replacing the filter cartridge type. High-precision pressure sensors are respectively arranged at different positions on the filter cylinder
The upper box body and the lower box body of the pulse dust collector are respectively provided with a wind pressure sensor, and a measured value of wind pressure in the box body is fed back to the PC end after the experiment system runs.
Be provided with transparent inspection window in the box under the aforesaid, be provided with a plurality of fixed cardboards on the box lateral wall, set up pulse jetting distance through adjusting the position of apron on fixed cardboard, jetting distance can be at 0mm, 30mm, 50mm, 70mm, five kinds of distance adjustments of 100mm, through changing the deashing performance of test dust remover under the different jetting distance.
Furthermore, a pulse pressure intelligent measurement and control system is arranged in the pulse type filter cartridge dust remover, 6 measuring points which are respectively 90mm, 180mm, 270mm, 400mm, 500mm and 600mm away from the top of the filter cartridge are selected on the surface of the filter cartridge, a high-precision pressure sensor is embedded into a support bracket in the filter cartridge and used for measuring the different blowing pressures of different positions of the filter cartridge, and a pulse control valve is controlled to automatically adjust the pulse blowing strength under the automatic control of a PLC control module.
The air inlet, the connecting pipeline and the air outlet of the dry-wet hybrid intelligent dust removal experiment system are respectively provided with a dust concentration sensor and an air speed sensor, and received data signals are fed back to a PC (personal computer) end through a charge amplifier and a data acquisition instrument to be recorded and processed.
Furthermore, the dust concentration sensor feeds the monitored dust concentration change back to the PC end, the PC end receives the signal and sends the signal to the vibration frequency controller to adjust the powder feeding rate, and the dust concentration required by the experiment is achieved through real-time monitoring and automatic control.
Furthermore, the wind speed sensor transmits signals to a PC computer end through a PLC control module, and a PID algorithm which takes the required filtering wind speed as a target is adopted to feed back commands to the variable frequency fan, so that the experimental amount of the filtering wind speed is adjusted.
Furthermore, the wind speed sensor and the laser sensor feed back the filtering wind speed and the thickness of the dust layer to a PC (personal computer), and MATLAB (matrix laboratory) programming software independently developed by a team is used for data processing to obtain the porosity numerical value of the dust layer condensed on the filter cylinder.
The dust concentration sensor, the laser sensor, the wind speed sensor, the pressure sensor and the wind pressure sensor are made of stainless steel materials, explosion-proof design is adopted, and the explosion-proof grade is D grade.
The difference between the invention and the prior art is that:
the invention introduces the ultrasonic dry fog dust suppression technology into the pulse filter cartridge dust remover creatively to form a unique dry-wet mixed intelligent dust removal experimental system, wherein the fog drops generated by the ultrasonic atomization nozzle group are used for pre-gathering fine and small particles in the dust-containing airflow, and then the fine and small particles are secondarily gathered by the dry dust removal system taking the pulse filter cartridge dust remover as the main body, so that the effective filtration is realized. The experiment system is provided with a particle characteristic monitoring system, the monitored particle parameters of the dusty airflow are transmitted to the PC end, and then signals are transmitted to the nozzle group to control the atomization rate of the nozzle group to realize the change of the fog-powder ratio. The pulse dust collector is internally provided with a pulse pressure intelligent measurement and control system which can monitor the side wall pressure received by the filter cylinder during pulse dust cleaning and control the pulse control valve to automatically adjust the pulse blowing strength under the automatic control of the PLC control module.
The change rule of the operation performance of the dry-wet mixed type dust removal system is tested by adjusting parameters such as the filtering speed, the particle size, the dust concentration and the like, in addition, the dust removal device can also select different types of filter cylinders to change the blowing distance and the like, and the research and development of equipment are promoted by carrying out comparison experiments.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of an experimental system layout constructed in accordance with the present invention;
FIG. 2 is a diagram of a central processing system control built in accordance with the present invention;
FIG. 3 is a technical roadmap of an experimental system constructed in accordance with the present invention.
Wherein, 1-vibration frequency controller; 2-a particle grading vibrating screen; 3-air inlet; 4-water adding port; 5-ultrasonic atomizing nozzle; 6-axial flow fan; 7-a junction box; 8-filtering the net; 9-connecting a pipeline; 10-a filter cartridge; 11-air bag; 12-a pulse control valve; 13-blowing pipe; 14-a deashing nozzle; 15-variable frequency fan; 16-air outlet; 17-ash bucket; 18-a fixed clamping plate; 19-loading the box body; 20-lower box body; 21-dust concentration sensor; 22-a laser sensor; 23-a wind speed sensor; 24-a pressure sensor; 25-wind pressure sensor; 26-doppler laser particle size tester; 27-a charge amplifier; 28-a data acquisition instrument; 29-PC computer end; and 30-a PLC control module.
Detailed Description
The invention provides a dry-wet hybrid intelligent dust removal experiment system, and in order to make the advantages and technical scheme of the invention clearer and clearer, the invention is described in detail with reference to specific embodiments.
With reference to fig. 1 and 2, the invention constructs a dry-wet hybrid intelligent dust removal experiment system, which comprises a powder feeding system consisting of a vibration frequency controller 1 and a particle grading vibration screen 2, a wet dust removal air duct consisting of an air inlet 3, a water filling port 4, an ultrasonic atomizing nozzle 5, an axial flow fan 6 and a filter screen 8, and a pulse type filter cartridge dust remover consisting of a filter cartridge 10, a variable frequency fan 15, an ash bucket 17, an upper box 19 and a lower box 20. The upper box body is internally provided with a pulse ash removal device and an air outlet 16, the lower box body 20 is internally provided with a dust chamber, and a laser sensor 22 is arranged on the side wall of the lower box body in order to observe the thickness of a condensed dust layer on the filter cartridge. The pulse ash cleaning device consists of an air bag 11, a pulse control valve 12, an injection pipe 13 and an ash cleaning nozzle 14. And a junction box 7 for starting the fan is arranged on the wet dust removal air cylinder. The air inlet 3, the connecting pipeline 9 and the air outlet 16 of the experimental system are respectively provided with a dust concentration sensor 21 and a wind speed sensor 23, and received data signals are fed back to a PC computer end 29 through a charge amplifier 27 and a data acquisition instrument 28 to be recorded and processed.
With reference to fig. 1 and 3, the experimental system of the present invention works according to the following principle: after the experiment system is started, the axial flow fan 6 and the variable frequency fan 15 are started simultaneously, experiment dust is put into the particle classification vibrating screen 2, the screened dust enters the air inlet 3 rapidly along with air flow, and superfine fog drops generated by the ultrasonic atomizing nozzle 5 on the wet dust removal air cylinder perform pre-aggregation on fine particles. The dust-containing airflow after the pre-aggregation treatment is collected for the second time through the filter cartridge 10 in the pulse type filter cartridge dust collector, and finally the clean airflow is discharged through the air outlet 16. When the dust on the filter cartridge 10 is accumulated to a certain degree, the pulse control valve 12 receives an instruction to release the compressed air from the air bag 11, the compressed air is sprayed out through the dust cleaning nozzle 14 on the spraying pipe 13, the dust is knocked down into the dust hopper 17, and the process of cleaning the dust by the pulse of the filter cartridge is completed.
The particle grading vibration screen 2 screens and grades materials through the exciting force generated by the vibration motor, the highest screening mesh number is 600 meshes, 7 materials with different particle sizes can be screened, and the experimental requirements under different particle sizes are met. The vibration frequency controller 1 was used to control the powder feeding rate of the experimental system.
The dust concentration sensor 21 feeds the monitored dust concentration change back to the PC computer end 29, the PC computer end 29 receives the signal and sends the signal to the vibration frequency controller 1 to adjust the powder feeding speed, and the dust concentration required by the experiment is achieved through real-time monitoring and automatic control.
The wet dust removal air duct body adopts a multi-section detachable structure, so that the wet dust removal air duct is easy to maintain and clean.
The ultrasonic nozzles 5 are respectively arranged at the upper part and the lower part of the wet dust removal air duct body, the nozzle groups adopt hydromechanics type ultrasonic atomizing nozzles, the generated micron-sized fog drops can enable the interior of the wet dust removal air duct to rapidly reach a saturated dry fog state, and in addition, the fog inlet mode can be changed by adjusting the angle of the nozzles.
Further, a particle characteristic monitoring system is further arranged on the wet dust removal air duct, and the particle characteristic monitoring system mainly comprises two Doppler laser particle size testers 26 arranged on the wet dust removal air duct, and the two Doppler laser particle size testers are respectively arranged at the front end and the rear end of the air duct. The particle characteristic monitoring system mainly utilizes a laser scattering principle to transmit signals to a PC (personal computer) end 29, adopts a PID (proportion integration differentiation) algorithm taking the required dry fog particle size as a target, and controls a nozzle group to adjust the atomization rate through a PLC (programmable logic controller) control module 30 to generate effective dry fog. The dry fog is efficiently and continuously generated through real-time monitoring and automatic control, and the experimental amount of the fog-powder ratio in the air duct is achieved through dynamic tracking.
The pulse type filter cartridge dust remover is internally provided with three replaceable pleated filter cartridges 10 with the outer diameter of 450mm, the inner diameter of 260mm and the length of 600mm, the experimental requirements can be met by replacing the types of the filter cartridges, and high-precision pressure sensors 24 are respectively arranged at different positions on the filter cartridges.
And the upper box body 19 and the lower box body 20 are respectively provided with a wind pressure sensor 25, and after the experiment system runs, a measured value of wind pressure in the box bodies is fed back to the PC computer end 29.
Be provided with transparent inspection window in the box 20 down, be provided with a plurality of fixed cardboard 18 on the box lateral wall, set up pulse jetting distance through adjusting the position of apron on fixed cardboard 18, jetting distance can be at five kinds of distance adjustments of 0mm, 30mm, 50mm, 70mm, 100mm, tests the deashing performance of dust remover under changing different jetting distances.
Furthermore, a pulse pressure intelligent measurement and control system is arranged in the pulse type filter cartridge dust remover, 6 measuring points which are respectively 90mm, 180mm, 270mm, 400mm, 500mm and 600mm away from the top of the filter cartridge are selected on the surface of the filter cartridge, a high-precision pressure sensor 24 is embedded into a support bracket in the filter cartridge 10 and used for measuring the blowing pressure at different positions of the filter cartridge 10, and the pulse control valve 12 is controlled to automatically regulate the pressure of the air bag 11 under the automatic control of the PC end 29 and the PLC control module 30.
The wind speed sensor 23 is used for monitoring the size of the filtering wind speed of the device, transmitting a signal to the PC computer end 29, and feeding a command back to the variable frequency fan 15 through the PLC control module 30 by adopting a PID algorithm taking the required filtering wind speed as a target so as to adjust the experimental amount of the filtering wind speed.
Further, the wind speed sensor 23 and the laser sensor 22 feed back the received filtering wind speed and the thickness of the dust layer to the PC computer 29, and data processing is performed through a data model independently developed by a team to obtain a porosity value of the dust layer condensed on the filter cartridge.
Furthermore, the dust concentration sensor 21, the laser sensor 22, the wind speed sensor 23, the pressure sensor 24 and the wind pressure sensor 25 are made of stainless steel, and are all designed to be explosion-proof, and the explosion-proof grade is grade D.
The parts which are not described in the invention can be realized by taking the prior art as reference.
It should be noted that: any equivalents, or obvious variations thereof, which may occur to those skilled in the art and which are commensurate with the teachings of this specification, are intended to be within the scope of the present invention.
Claims (3)
1. The utility model provides a dry and wet hybrid intelligent dust removal experimental system, includes for powder system, wet dust removal system and dry-type dust removal system, its characterized in that:
the powder feeding system comprises a vibration frequency controller and a particle grading vibration sieve;
the wet dust removal system comprises a wet dust removal air cylinder and a particle characteristic monitoring system, wherein the wet dust removal air cylinder comprises an air inlet, a water filling port, an ultrasonic atomizing nozzle, an axial flow fan and a filter screen, and a junction box for starting the fan is arranged on the wet dust removal air cylinder;
the dry type dust removal system comprises a pulse type filter drum dust remover and a pulse pressure intelligent measurement and control system, wherein the pulse type filter drum dust remover consists of a filter drum, a variable frequency fan, an upper box body, a lower box body and an ash bucket, a pulse blowing dust removal device and an air outlet are arranged in the upper box body, the air outlet is connected with the variable frequency fan, a cover plate is arranged at the bottom of the upper box body and is connected with the lower box body through the cover plate, a dust removal chamber is arranged in the lower box body, the ash bucket is arranged at the bottom of the dust removal chamber, a laser sensor is arranged on the side wall of the lower box body and is used for observing the thickness of a condensed dust layer on the filter drum;
the vibrating motor of the particle grading vibrating screen is used for carrying out synchronous and reverse rotation to generate exciting force to screen and grade materials, the highest screening mesh number is 600 meshes, and the vibrating screen is used for screening 7 materials with different particle sizes; the dust concentration sensor and the air speed sensor are arranged at the air inlet and the air outlet, and received data signals are fed back to the PC end for processing through the charge amplifier and the data acquisition instrument;
the ultrasonic atomizing nozzles are arranged in the wet dust removal air duct cylinder, two groups of ultrasonic atomizing nozzles are arranged above and below the wet dust removal air duct cylinder respectively, and the hydrodynamics type ultrasonic atomizing nozzles are adopted;
the particle characteristic monitoring system mainly comprises two Doppler laser particle size testers arranged on a wet-type dust removal air cylinder, and the two Doppler laser particle size testers are respectively arranged at the front end and the rear end of the wet-type dust removal air cylinder;
three replaceable pleated filter cylinders with the outer diameter of 450mm, the inner diameter of 260mm and the length of 600mm are arranged in the pulse type filter cylinder dust remover, pressure sensors are respectively arranged at different positions on the filter cylinders, and an upper box body and a lower box body of the pulse type filter cylinder dust remover are respectively provided with a wind pressure sensor;
the pulse pressure intelligent measurement and control system is characterized in that 6 measuring points which are 90mm, 180mm, 270mm, 400mm, 500mm and 600mm away from the top of a filter cylinder are selected on the surface of the filter cylinder, and a high-precision pressure sensor is embedded into a supporting bracket in the filter cylinder.
2. The dry-wet hybrid intelligent dust removal experiment system as claimed in claim 1, wherein: the wet dust removal air duct adopts a multi-section detachable structure as a dust removal air duct body.
3. The dry-wet hybrid intelligent dust removal experiment system as claimed in claim 2, wherein: the pulse dust collector is characterized in that a transparent inspection window is arranged on a lower box body of the pulse dust collector, a plurality of fixed clamping plates are arranged on the side wall of the lower box body, pulse spraying distances are arranged at the positions of the fixed clamping plates through adjusting cover plates, and the spraying distances are adjusted at five distances of 0mm, 30mm, 50mm, 70mm and 100 mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426446.3A CN110124430B (en) | 2019-05-22 | 2019-05-22 | Dry-wet hybrid intelligent dust removal experiment system |
| PCT/CN2019/098588 WO2020232832A1 (en) | 2019-05-22 | 2019-07-31 | Intelligent hybrid wet/dry dust removal experimentation system |
| ZA2021/00811A ZA202100811B (en) | 2019-05-22 | 2021-02-05 | Intelligent hybrid wet / dry dust removal experimentation system |
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| CN201910426446.3A CN110124430B (en) | 2019-05-22 | 2019-05-22 | Dry-wet hybrid intelligent dust removal experiment system |
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| CN110124430A CN110124430A (en) | 2019-08-16 |
| CN110124430B true CN110124430B (en) | 2020-12-08 |
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| CN (1) | CN110124430B (en) |
| WO (1) | WO2020232832A1 (en) |
| ZA (1) | ZA202100811B (en) |
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2019
- 2019-05-22 CN CN201910426446.3A patent/CN110124430B/en active Active
- 2019-07-31 WO PCT/CN2019/098588 patent/WO2020232832A1/en active Application Filing
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2021
- 2021-02-05 ZA ZA2021/00811A patent/ZA202100811B/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020232832A1 (en) | 2020-11-26 |
| ZA202100811B (en) | 2021-09-29 |
| CN110124430A (en) | 2019-08-16 |
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