CN114951198A - Mechanical ventilation dust removal device for strip-shaped coal yard and dust removal method thereof - Google Patents
Mechanical ventilation dust removal device for strip-shaped coal yard and dust removal method thereof Download PDFInfo
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- CN114951198A CN114951198A CN202210511897.9A CN202210511897A CN114951198A CN 114951198 A CN114951198 A CN 114951198A CN 202210511897 A CN202210511897 A CN 202210511897A CN 114951198 A CN114951198 A CN 114951198A
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- 239000003245 coal Substances 0.000 title claims abstract description 145
- 239000000428 dust Substances 0.000 title claims abstract description 108
- 238000005399 mechanical ventilation Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009423 ventilation Methods 0.000 claims abstract description 47
- 230000036541 health Effects 0.000 claims abstract description 6
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- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 9
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- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
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- 239000007789 gas Substances 0.000 description 11
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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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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Abstract
The invention provides a mechanical ventilation dust removing device for a bar-shaped coal yard and a dust removing method thereof, wherein coal piles are respectively arranged on two sides of a bucket wheel set, one side of a plurality of coal piles is used for dust removal of the whole coal plant through a plurality of coal yard sprinklers, a roof ventilator is arranged in the middle of a coal yard frame, a plurality of fan units are arranged on the roof ventilator, coal yard ceilings are respectively arranged on two sides of the roof ventilator and two sides of the coal yard frame, a plurality of lower ventilation plates are respectively arranged at the lower ends of the coal yard ceilings, and the roof ventilator is matched with the lower ventilation plates to form two mechanical ventilation means of upper inlet, lower outlet, lower inlet and upper outlet. The content of harmful gas in the coal yard is reduced, and the occupational health requirement of the internal environment of the coal yard is met.
Description
Technical Field
The invention relates to the technical field of coal storage equipment, in particular to a mechanical ventilation dust removal device for a strip-shaped coal yard and a dust removal method thereof.
Background
Most of domestic newly-built coal-fired power plants adopt closed coal yards, and the existing open-air coal yards and semi-open-air coal yards are forced to implement closed transformation in succession under the environmental protection pressure. In a closed coal yard, the strip-shaped coal yard is more suitable for actual production than a circular coal yard and a silo, the strip-shaped closed coal yard adopts a steel frame structure, a roof adopts a steel roof truss, the outside is closed by a color steel plate, coal storage is not influenced by climatic conditions, dust raising is prevented, the peripheral environment is protected, the dust concentration and harmful gases (CO and CH 4) in the environment inside the strip-shaped coal yard can be accumulated, the conventional strip-shaped coal yard generally adopts a natural ventilation mode, and a ventilation circulation is formed between a ventilation plate block between the top of a retaining wall and a net rack and a wind-sheltering skylight of a roof or a ventilation plate of a roof ventilator.
However, the existing natural ventilation method has the following problems:
1. the condition that the dust concentration exceeds the standard often appears in the bar coal yard, often adopts water spray or little fog dust suppression facility in order to guarantee the inside concentration in coal yard. The water injection amount is often uncontrollable, so that the water content in coal is serious, the failure rate of subsequent equipment along the coal flow is influenced, and the input rate of the subsequent dust suppression equipment is influenced.
2. At present, the coal is required for the unit. The coal yard has long coal storage period and long coal storage time, the operation principle is first in first out, although the storage time of the coal pile of the coal yard can be effectively controlled, the internal temperature of the coal stored in the closed coal yard is difficult to control, smoldering and smoking phenomena often occur, the operation and the overhaul of the body of workers are influenced, and the occupational hazard factors are increased.
Disclosure of Invention
The invention provides a mechanical ventilation dust removal device for a strip-shaped coal yard and a dust removal method thereof, aiming at solving the technical problems that the internal dust concentration of the coal yard is high, the ventilation performance is poor, the harmful gas is more, the ventilation means is single, the monitoring means is only improved, the water spraying dust suppression and temperature reduction means is adopted, and the ventilation environment in the strip-shaped coal yard is improved and the occupational hazard factors exceed the standard in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the mechanical ventilation and dust removal device comprises a bucket wheel unit, wherein coal piles are arranged on two sides of the bucket wheel unit respectively, a plurality of coal yard sprinklers are arranged on one side of each coal pile, the whole coal plant is subjected to dust removal through the plurality of coal yard sprinklers, a coal yard frame is arranged above the plurality of coal piles, a roof ventilator is arranged in the middle of the coal yard frame, a plurality of fan units are arranged on the roof ventilator, coal yard ceilings are arranged on two sides of the roof ventilator and two sides of the coal yard frame respectively, a plurality of lower ventilation plates are arranged at the lower ends of the coal yard ceilings respectively, and two mechanical ventilation means of up-in-down-out and down-in-out are formed by matching the roof ventilator with the plurality of lower ventilation plates.
Furthermore, during the operation of the bucket wheel set, according to the difference of the operating position, the fan unit at the corresponding position is started to suck air from the outside, so that an up-in and down-out ventilation mode is formed, dust is restrained from being located in a hopper taking area of the bucket wheel set, and the dust is prevented from diffusing to the upper space.
Furthermore, under the upper inlet and lower outlet ventilation mode, the rotating speed of the corresponding fan unit is adjusted according to the dust suppression effect to achieve the dust suppression effect, the input frequency of a coal field sprinkler is reduced, the water injection quantity is reduced, the coal blocking times of a coal feeder, a coal hopper, a belt and a bucket wheel machine which are follow-up equipment along the coal flow are reduced, and further the hot air output is reduced, so that the combustion efficiency of the boiler is improved.
Further, under the long-time coal of storing up of coal in the coal yard condition of not digesting, when leading to dust concentration superscript, harmful gas concentration to be not conform to occupational health demand for a long time, start corresponding position the fan unit is taken out the air from inside, and the ventilation mode of going into and going out from under the formation, the fan unit is in the low rotational speed state of induced drafting, reduces the inside gas concentration of bar coal yard fast.
Further, the roof ventilator comprises a fan installation bottom plate, a plurality of fan units are arranged in the middle of the fan installation bottom plate, a small-power 120W fan is selected by the fan units close to two ends of the fan installation bottom plate, a medium-power 250W fan is selected by the fan units close to two ends of the middle of the fan installation bottom plate, and a high-power 320W fan is selected by the fan unit in the middle of the fan installation bottom plate.
Further, the fan unit includes the fan body, the fan body is located fan mounting plate's middle part, the top surface of fan body is equipped with the heat and moulds the ring, the middle part of heat and moulding the ring is equipped with the dust suppression piece, the upper end of heat and moulding the ring is equipped with the mushroom cap.
Furthermore, the thermoplastic ring comprises a top fixing ring, the top surface of the top fixing ring is provided with a plurality of thermoplastic plates, and the lower ends of the thermoplastic plates are arranged on the top surface of the fan body.
Furthermore, the dust suppression block comprises a dust suppression supporting frame, and a plurality of S-shaped dust suppression plates are arranged in the dust suppression supporting frame.
Furthermore, a plurality of S-shaped dust suppression plates are arranged in an untight and overlapped mode.
Furthermore, the lower ventilation plate comprises a ventilation outer frame, and a ventilation net piece is arranged in the middle of the ventilation outer frame.
Compared with the prior art, the invention has the beneficial effects that:
the mechanical ventilation dust removal device for the strip-shaped coal yard and the dust removal method thereof can change the internal environment of the coal yard in the using process, improve the aspect of dust mass concentration and the aspect of air flow organization, play a role in reducing the internal dust concentration of the strip-shaped coal yard and reducing the content of harmful gas in the coal yard, and meet the occupational health requirements of the internal environment of the coal yard.
1. The coal yard is provided with the mechanical ventilation fan, a row of (5) bidirectional air exhaust fans are arranged on a ceiling, and the stepless speed change axial flow fan adopts different starting modes under different conditions, so that the internal airflow organization environment of the coal yard is changed, the diffusion speed of dust and the concentration level in the space are reduced, the frequency of water spraying and dust suppression use is controlled, the bin consolidation of the coal bin is effectively avoided, the belt is effectively prevented from deviating and slipping, the belt joint is prevented from being propped up, and the utilization rate of equipment is improved.
2. Set up fan export S-shaped annular dust guard and mushroom cap, through set up one row of axial fan at bar coal yard top, take into account sleet weather effect, set up the mushroom cap, guarantee the safe operation of equipment, add between mushroom cap and fan export and establish S-shaped dust guard and mould the fever board with 100 mu m and play the dust fall effect, when bucket wheel machine, the coal pusher do not have the operation in the coal yard, utilize fan self to realize low rotational speed, two-way pivoted characteristics, carry out self-cleaning to S-shaped dust guard and 100 mu m mould the fever board.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic cross-sectional view of the internal structure of the present invention;
FIG. 3 is an exploded view of the internal structure of the present invention;
FIG. 4 is a schematic view of the construction of the roof ventilator of the present invention;
FIG. 5 is a schematic view of the fan unit configuration of the present invention in the open position;
FIG. 6 is a schematic view of a thermoplastic ring structure of the present invention;
FIG. 7 is a schematic view of the dust suppression block structure of the present invention;
figure 8 is a schematic view of the lower vent panel structure of the present invention.
In the figure: 1. a bucket wheel unit; 2. stacking coal; 3. a coal yard sprinkler; 4. a coal yard frame; 41. a coal yard ceiling; 5. a roof ventilator; 51. a fan unit; 511. a fan body; 512. a thermoplastic ring; 5121. a top securing ring; 5122. a thermoplastic sheet; 513. a dust suppression block; 5131. a dust suppression support frame; 5132. an S-shaped dust suppression plate; 514. a mushroom cap; 52. a fan mounting base plate; 6. a lower ventilation plate; 61. a ventilation outer frame; 62. a ventilation mesh.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration, various embodiments of the invention which may be practiced in different forms and not limited to the embodiments described herein, but on the contrary, the embodiments are provided so as to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the embodiment, please refer to fig. 1-3, a mechanical ventilation dust removing device for a strip coal yard and a dust removing method thereof comprise a bucket wheel unit 1, coal piles 2 are respectively arranged on two sides of the bucket wheel unit 1, a plurality of coal yard sprinklers 3 are arranged on one side of the coal piles 2, dust is reduced for the whole coal plant through a plurality of coal yard sprinklers 3, a coal yard frame 4 is arranged above a plurality of coal piles 2, the middle part of the coal yard frame 4 is provided with a roof ventilator 5, the roof ventilator 5 is provided with a plurality of fan units 51, coal yard ceilings 41 are respectively arranged on two sides of the roof ventilator 5 and two sides of the coal yard frame 4, a plurality of lower ventilation plates 6 are respectively arranged at the lower ends of the coal yard ceilings 41, and two mechanical ventilation means of upper inlet and lower outlet and lower inlet and upper outlet are formed by matching the roof ventilator 5 and the lower ventilation plates 6; according to the research, the method comprises the following steps: the average wind speed and the local wind speed in the factory are both larger than the upper inlet and lower outlet ventilation mode under the condition of lower inlet and upper outlet ventilation; but the lower inlet and upper outlet ventilation mode has stronger entrainment and diffusion promotion effects, thereby accelerating the diffusion speed and the pollution concentration of the coal pile dust; the upper inlet lower outlet plenum flow pattern suppresses the tendency of coal pile dust to spread into the upper space and controls dust pollution primarily in the area near the coal pile. .
In the embodiment, during the operation of the bucket wheel unit 1, the fan units 51 at corresponding positions are started to suck air from the outside according to different operation positions, so as to form an up-in-down-out ventilation mode, suppress dust from being in a hopper taking area of the bucket wheel unit 1, and prevent dust from diffusing to an upper space, and in the up-in-down-out ventilation mode, the rotating speed of the corresponding fan units 51 is adjusted according to a dust suppression effect to achieve the dust suppression effect, so that the input frequency of the coal field sprinkler 3 is reduced, the water injection amount is reduced, the coal blockage times of a coal feeder, a coal hopper, a belt and a bucket wheel machine which are follow-up equipment in a coal flow are reduced, and further, the hot air output is reduced, so that the combustion efficiency of a boiler is improved.
According to the embodiment, under the condition that coal stored in a coal yard is not digested for a long time, dust concentration exceeds a standard, and harmful gas concentration is not in line with occupational health requirements for a long time, the fan unit 51 at a corresponding position is started to pump air out from the inside, a lower-inlet-upper-outlet ventilation mode is formed, the fan unit 51 is in a low-rotation-speed air suction state, and the gas concentration in the strip-shaped coal yard is reduced rapidly.
With reference now to fig. 4, in an embodiment, the roof ventilator 5 comprises a fan mounting base 52, the middle part of the fan mounting base plate 52 is provided with a plurality of fan units 51, the plurality of fan units 51 close to the two ends of the fan mounting base plate 52 select a low-power 120W fan, the fan units 51 at the two ends of the middle of the fan mounting base plate 52 select a medium-power 250W fan, the fan unit 51 in the middle of the fan mounting base plate 52 selects a high-power 320W fan, the design selects different power fans according to the distance relationship between the fan unit 51 and the coal yard frames 4 at two sides and the periphery, the most close side selects a low-power fan due to the fact that the working environment is close to the coal yard frames 4 at two sides of the two fan units 51, and then two fan units 51 near the middle are selected to select high-power fans, and the fan unit 51 at the middle is selected to select an ultrahigh-power fan.
In an embodiment, please refer to fig. 5 again, the blower unit 51 includes a blower body 511, the blower body 511 is disposed in the middle of the blower mounting base plate 52, a thermoplastic ring 512 is disposed on the top surface of the blower body 511, a dust suppression block 513 is disposed in the middle of the thermoplastic ring 512, and a mushroom cap 514 is disposed at the upper end of the thermoplastic ring 512, so that the influence of rain and snow weather is taken into consideration, and the influence of rain and snow weather, snow and rainwater are prevented from entering the coal yard through the mushroom cap 514, so as to ensure that the coal is not damaged by rain and snow; the risk of dust overflow is reduced through the thermoplastic ring 512, the possibility of dust overflow is further reduced through the dust suppression block 513, the dust content of exhaust air is reduced, and the exhaust gas meets the environmental protection requirement.
In an embodiment, please refer to fig. 6 again, the thermoplastic ring 512 comprises a top fixing ring 5121, the top surface of the top fixing ring 5121 is provided with a plurality of thermoplastic plates 5122, and the lower ends of the plurality of thermoplastic plates 5122 are all provided on the top surface of the blower body 511.
In an embodiment, please refer to fig. 7, the dust suppression block 513 includes a dust suppression support frame 5131, a plurality of S-shaped dust suppression plates 5132 are disposed inside the dust suppression support frame 5131, and the plurality of S-shaped dust suppression plates 5132 are disposed in a non-tight and overlapping manner.
In an embodiment, please refer to fig. 8, the lower ventilation board 6 includes a ventilation frame 61, and a ventilation mesh 62 is disposed in the middle of the ventilation frame 61.
The operation principle is as follows: firstly, in order to ensure the normal work of a coal yard, a bucket wheel unit 1 is arranged in the coal yard, and in order to ensure the dust removal requirement: a plurality of coal yard sprinklers 3 are arranged; the roof ventilator 5 and the lower ventilation plates 6 are matched to form two mechanical ventilation means of upper inlet and lower outlet and lower inlet and upper outlet, during the working period of the bucket wheel set 1, the fan unit 51 at the corresponding position is started to suck air from the outside according to the difference of the working positions, an upper inlet and lower outlet ventilation mode is formed, dust is restrained from being in a hopper taking area of the bucket wheel set 1, and the dust is prevented from being diffused to the upper space; under the upper inlet and lower outlet ventilation mode, the rotating speed of the corresponding fan unit 51 is adjusted according to the dust suppression effect to achieve the dust suppression effect, the input frequency of the coal field sprinkler 3 is reduced, the water injection quantity is reduced, the coal plugging times of a coal feeder, a coal hopper, a belt and a bucket wheel machine which are follow-up equipment along the coal flow are reduced, and further the hot air output is reduced, so that the combustion efficiency of the boiler is improved; under the condition that coal stored in a coal yard is not digested for a long time, when the dust concentration exceeds the standard and the concentration of harmful gas does not meet the occupational health requirement for a long time, starting the fan unit 51 at the corresponding position to pump air from the inside to form a ventilation mode of downward inlet and upward outlet, wherein the fan unit 51 is in a low-rotation-speed air suction state, so that the concentration of gas in the strip-shaped coal yard is quickly reduced; by additionally arranging the mushroom cap 514, snow and rainwater can be prevented from entering the coal yard in rainy and snowy days, and the stored coal is prevented from being damaged by rain and snow; the risk of dust spillage is reduced by the thermoplastic ring 512; the dust inhibiting block 513 further reduces the possibility of dust overflow and reduces the dust content of exhaust air, so that the exhaust gas meets the environmental protection requirement.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without such modifications.
Claims (10)
1. The utility model provides a mechanical draft dust collector and dust removal method for bar coal yard, includes bucket wheel unit (1), its characterized in that: the both sides of bucket wheel unit (1) are equipped with coal pile (2) respectively, and are a plurality of one side of coal pile (2) is equipped with a plurality of coal yard sprinklers (3), and is through a plurality of coal yard sprinkler (3) carry out the dust fall to whole coal factory, and is a plurality of the top of coal pile (2) is equipped with coal yard frame (4), the middle part of coal yard frame (4) is equipped with roof ventilator (5), be equipped with a plurality of fan unit (51) on roof ventilator (5), the both sides of roof ventilator (5) the both sides of coal yard frame (4) are equipped with coal yard ceiling (41) respectively, and are a plurality of the lower extreme of coal yard ceiling (41) is equipped with a plurality of ventilation plate (6) down respectively, utilizes roof ventilator (5) and a plurality of ventilation plate (6) cooperation down, forms to advance under and go out and go in under with go out two kinds of mechanical ventilation means.
2. The mechanical ventilation dust removal device for the strip coal yard and the dust removal method thereof as claimed in claim 1, wherein: during the working period of the bucket wheel set (1), the fan units (51) at corresponding positions are started to suck air from the outside according to different working positions, so that an up-in-down-out ventilation mode is formed, dust is restrained from being in a hopper taking area of the bucket wheel set (1), and the dust is prevented from diffusing to an upper space.
3. The mechanical ventilation dust removal device for the strip coal yard and the dust removal method thereof according to claim 2 are characterized in that: and under the upper inlet and lower outlet ventilation mode, the rotating speed of the corresponding fan unit (51) is adjusted according to the dust suppression effect to achieve the dust suppression effect, the input frequency of the coal field sprinkler (3) is reduced, the water injection quantity is reduced, the coal blocking times of a coal feeder, a coal hopper, a belt and a bucket wheel machine which are follow-up equipment along the coal flow are reduced, and further the hot air output is reduced, so that the combustion efficiency of the boiler is improved.
4. The mechanical ventilation dust removal device and the dust removal method for the strip coal yard according to claim 1, characterized in that: under the long-time coal of storing up of coal in coal yard does not digest the condition, when leading to dust concentration superscript, harmful gas concentration to be not conform to occupational health demand for a long time, start corresponding position fan unit (51) air extraction from inside, form and advance down and go out the ventilation mode, fan unit (51) are in the low rotational speed state of induced drafting, reduce the inside gas concentration of bar coal yard fast.
5. The mechanical ventilation dust removal device and the dust removal method for the strip coal yard according to claim 1, characterized in that: the roof ventilator (5) comprises a fan mounting base plate (52), a plurality of fan units (51) are arranged in the middle of the fan mounting base plate (52), the fan units (51) close to two ends of the fan mounting base plate (52) select low-power 120W fans, the fan units (51) close to two ends of the middle of the fan mounting base plate (52) select medium-power 250W fans, and the fan units (51) in the middle of the fan mounting base plate (52) select high-power 320W fans.
6. The mechanical ventilation dust removal device for the strip coal yard and the dust removal method thereof according to claim 5 are characterized in that: fan unit (51) include fan body (511), fan body (511) are located the middle part of fan mounting plate (52), the top surface of fan body (511) is equipped with thermoplastic ring (512), the middle part of thermoplastic ring (512) is equipped with dust suppression piece (513), the upper end of thermoplastic ring (512) is equipped with mushroom cap (514).
7. The mechanical ventilation dust removal device and the dust removal method for the strip coal yard according to claim 6, characterized in that: the thermoplastic ring (512) comprises a top fixing ring (5121), the top surface of the top fixing ring (5121) is provided with a plurality of thermoplastic plates (5122), and the lower ends of the thermoplastic plates (5122) are arranged on the top surface of the blower body (511).
8. The mechanical ventilation dust removal device and the dust removal method for the strip coal yard according to claim 6, characterized in that: the dust suppression block (513) comprises a dust suppression supporting frame (5131), and a plurality of S-shaped dust suppression plates (5132) are arranged inside the dust suppression supporting frame (5131).
9. The mechanical ventilation dust removal device for the strip coal yard and the dust removal method thereof according to claim 5 are characterized in that: a plurality of S-shaped dust suppression plates (5132) are arranged in a non-tight and overlapped mode.
10. The mechanical ventilation dust removal device and the dust removal method for the strip coal yard according to claim 1, characterized in that: the lower ventilation plate (6) comprises a ventilation outer frame (61), and a ventilation net piece (62) is arranged in the middle of the ventilation outer frame (61).
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| CN202210511897.9A CN114951198B (en) | 2022-05-12 | 2022-05-12 | Mechanical ventilation dust removal device for strip-shaped coal yard |
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| CN202210511897.9A CN114951198B (en) | 2022-05-12 | 2022-05-12 | Mechanical ventilation dust removal device for strip-shaped coal yard |
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| KR20140012765A (en) * | 2014-01-09 | 2014-02-03 | 박경화 | The control system of livestock barn by heat quantity index |
| CN204902104U (en) * | 2015-09-14 | 2015-12-23 | 泰富国际工程有限公司 | Ventilation device and have device's closed stock ground |
| CN206566623U (en) * | 2017-03-22 | 2017-10-20 | 肥城汇立机械有限公司 | A kind of sinter-plate precipitator |
| CN206793322U (en) * | 2017-06-16 | 2017-12-26 | 河南金汇不锈钢产业集团有限公司 | A kind of dust arrester for big continuous casting Fan Bao areas |
| CN213044448U (en) * | 2020-08-07 | 2021-04-27 | 卢江河 | Planting big-arch shelter with multistage exhaust device |
| CN214945170U (en) * | 2021-07-21 | 2021-11-30 | 安徽金南方消防通风设备有限公司 | Roof fan suitable for building at sea |
| CN113690780A (en) * | 2021-09-01 | 2021-11-23 | 郑州通源电气有限公司 | Multifunctional box-type substation |
| CN216281872U (en) * | 2021-11-25 | 2022-04-12 | 西安西热锅炉环保工程有限公司 | Ventilation and dust removal system for closed stock yard |
| CN217888994U (en) * | 2022-05-12 | 2022-11-25 | 华能(大连)热电有限责任公司 | Mechanical ventilation dust removal device for strip-shaped coal yard |
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