Belt coal conveying dust removal device

Abstract

The utility model discloses a belt coal conveying dust collector, main part includes coal conveying belt, raw coal bin, plough coal ware, coal dust collector, dust gas inlet pipe, gas pocket, electromagnetic pulse valve, filter bag, dust removal fan, material guide groove. The utility model will carry the gas of coal dust powder into the dust collector, and the dust is attached to the outer surface of cloth bag after the cloth bag filtration, and the pulse jet dust cleaning mechanism runs regularly or is controlled to run by pressure difference, and the dust returns to the material guide groove of belt conveyor, and the dust collector of bin top returns to raw coal bin, and the clean air is arranged to the atmosphere by the dust collector supporting fan, and the coal dust emission concentration is required to be less than or equal to 10mg / Nm3. The utility model has good dust removal effect, which helps to maintain the stable operation of equipment, improves the stable operation of equipment, reduces the abnormal fluctuation of equipment caused by coal dust, and improves the reliability of production. Thoroughly prevent the dust raising when feeding coal, reduce the risk of coal feeding link.

Description

Technical Field

[0001] This utility model relates to the field of coal conveying dust removal technology, and in particular to a belt conveyor coal dust removal device, especially to belt dust removal for conveying fine particles such as coal powder. Background Technology

[0002] Currently, most domestic chemical and coal-fired power plants use belt conveyors to transport coal to boilers and gasification units. During the coal's descent into the coal bunker, dust is generated. This dust not only enters the equipment, causing abnormal fluctuations (such as wear on idlers and rollers, and electrical malfunctions), but also pollutes the environment, affecting the physical and mental health of personnel handling coal. When the dust concentration accumulates to a certain level, reaching the explosive limit, it can cause a coal dust explosion. Existing technologies lack effective devices for removing coal dust. Summary of the Invention

[0003] The purpose of this invention is to overcome the deficiencies of existing technologies and provide a belt conveyor coal dust removal device. By using this device, coal dust can be effectively collected, the on-site working environment can be improved, and the coal dust concentration can be prevented from reaching the explosion limit.

[0004] This utility model is achieved through the following technical solution:

[0005] A belt conveyor dust removal device includes a raw coal bunker, a conveyor belt installed above the bunker, a coal plow installed on the conveyor belt at a position corresponding to the raw coal bunker, and a coal dust collector. The coal dust collector includes a coal dust collection shell with a hollow top cover at the top. Several gas inlets and outlets are opened on the lower surface of the hollow top cover. Multiple filter cages are installed under the hollow top cover, with the top of each filter cage connected to the gas inlets and outlets. Each filter cage is covered with a filter bag. A backflushing gas inlet and a gas outlet are also opened on the hollow top cover. The backflushing gas inlet and the gas outlet are respectively connected to a pulse jet cleaning mechanism and a gas emission device. A feed port is provided at the lower end of the coal dust collection shell, and a dust gas inlet pipe is fixed on the lower outer side of the coal dust collection shell. The gas inlet of the dust gas inlet pipe is aligned with the coal drop port of the coal plow.

[0006] A guide chute is installed at the material inlet at the lower end of the coal powder collection shell, and the guide chute is located above the coal conveyor belt.

[0007] The pulse jet cleaning mechanism includes an air tank, which is connected to the back-flushing gas inlet via a pipeline. An electromagnetic pulse valve is installed at the outlet of the air tank, and the electromagnetic pulse valve is equipped with a control system.

[0008] The gas emission outlet is a dust removal fan.

[0009] A dust collection hood is installed at the coal drop outlet of the plow.

[0010] A dust curtain is installed at the coal drop outlet of the plow.

[0011] The pulverized coal collector collects the dust generated when coal falls from the conveyor belt into the raw coal bunker. Equipped with electromagnetic pulse valves and a central control DCS system, the collector enables automatic dust removal. After the pulverized coal gas enters the collector, it is filtered through filter bags, where the dust adheres to the outer surface. A pulse-jet cleaning mechanism operates periodically or under differential pressure control. The accumulated dust returns to the conveyor belt from the feed chute, while clean air is discharged into the atmosphere by the dust collector's accompanying dust removal fan.

[0012] The advantages of this utility model are:

[0013] This invention has a good dust removal effect, which helps to maintain stable operation of the equipment, improves the stability of the equipment, reduces abnormal fluctuations in the equipment caused by coal dust, improves the reliability of production, effectively prevents dust from being generated during coal feeding, and reduces the risk in the coal feeding process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 A schematic diagram of the installation of the dust collector cover's dust curtain. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0018] This utility model provides a belt conveyor dust removal device, the main body of which includes a coal conveyor belt 1, a raw coal bunker 2, a coal plow 3, a coal powder collector 4, a dust inlet pipe 5, an air manifold 6, an electromagnetic pulse valve 7, filter bags 8, a dust removal fan 9, and a feed chute 10. This dust removal system effectively improves dust conditions at the production site, thoroughly and effectively prevents dust generation during coal feeding, and reduces the risks associated with the coal feeding process.

[0019] like Figure 1As shown, a belt conveyor dust removal device includes a raw coal bunker 2, a conveyor belt 1 installed above the raw coal bunker 2, a plow 3 installed on the conveyor belt 1 at a position corresponding to the raw coal bunker 2, and a coal dust collector 4. The coal dust collector 4 includes a coal dust collection shell, a hollow top cover 11 at the top of the coal dust collection shell, several gas inlets and outlets on the lower surface of the hollow top cover 11, and multiple filter cages installed below the hollow top cover 11. The top of each filter cage is connected to the gas inlet and outlet, and a filter bag 8 is fitted over each filter cage. A backflushing gas inlet and a gas outlet are also provided on the hollow top cover 11. The backflushing gas inlet and the gas outlet are respectively connected to a pulse jet cleaning mechanism and a gas emission device. A material inlet is provided at the lower end of the coal dust collection shell, and a dust gas inlet pipe 5 is fixed on the lower outer side of the coal dust collection shell. The gas inlet of the dust gas inlet pipe 5 is aligned with the coal drop outlet of the plow 3.

[0020] A guide chute 10 is installed at the material inlet at the lower end of the coal powder collection shell. The guide chute 10 is located above the coal conveyor belt 1. The coal powder coming down from the filter bag 8 falls onto the coal conveyor belt 1 through the guide chute 10.

[0021] The pulse jet cleaning mechanism includes an air tank 6, which is connected to the back-blowing gas inlet through a pipeline. An electromagnetic pulse valve 7 is installed at the outlet of the air tank 6. The electromagnetic pulse valve 7 is equipped with a control system. The pulse jet cleaning mechanism operates on a timed basis or is controlled by differential pressure, which can realize the automatic dust blowing function.

[0022] The gas discharge port is a dust removal fan 9, which discharges the purified gas.

[0023] like Figure 2 As shown, a dust collection hood 12 is installed at the coal drop opening of the plow 3. A dust curtain 13 is also installed at the coal drop opening of the plow 3. The coal dust collector 4 is introduced from the coal drop opening of the plow 3 through the dust inlet pipe 5. The dust collection hood 12 and the dust curtain 13 at the coal drop opening of the dust collection hood 12 can both prevent dust leakage and ensure that coal enters the raw coal bunker. The coal dust in the dust collection hood 12 is introduced into the coal dust collector 4 for filtration through the dust removal fan 9 via the dust inlet pipe 5.

[0024] Dust collection hoods and dust curtains prevent dust and gas from escaping from the coal drop opening of the plow 3.

[0025] The working principle of this utility model is as follows:

[0026] 1. Introduction of dust-laden gas:

[0027] Coal on the conveyor belt 1 is unloaded into the raw coal bunker 2 via the plow 3. At the coal drop outlet of the plow 3, coal dust and air mix to form dust-laden gas.

[0028] The gas inlet of the dust inlet pipe 5 is aligned with the coal drop outlet of the coal plow 3, and the dust-laden gas is introduced into the coal powder collector 4 through the dust inlet pipe 5.

[0029] 2. Filtration process:

[0030] After the dust-laden gas enters the coal powder collection shell, the filter bag 8 outside the filter cage filters the dust-laden gas. The coal powder is trapped on the surface of the filter bag 8, and the clean gas enters the interior of the filter cage through the pores of the filter bag 8. Then, it is collected in the hollow top cover 11 through the gas inlet and outlet and discharged into the atmosphere by the dust removal fan 9.

[0031] 3. Dust removal process:

[0032] As the filtration time increases, coal dust will gradually accumulate on the surface of filter bag 8, increasing the filtration resistance.

[0033] The pulse jet cleaning mechanism injects high-pressure pulse gas into the filter bag 8 through the back-blowing gas inlet, causing the filter bag 8 to expand instantly and shake off the coal powder on the surface of the filter bag 8. The coal powder falls into the material port at the lower end of the coal powder collection shell and falls onto the coal conveying belt 1 through the guide chute 10. After cleaning, the filter bag 8 restores its air permeability and continues to filter.

[0034] 4. Clean gas emissions:

[0035] The clean gas filtered by the filter bag 8 is discharged through the gas outlet of the hollow top cover 11, enters the gas emission device, and is finally discharged into the atmosphere.

[0036] 5. Coal powder collection and treatment:

[0037] Coal powder that falls into the lower end of the coal powder collection shell falls onto the coal conveyor belt 1 for recycling, thus avoiding resource waste.

[0038] The features of this utility model are as follows:

[0039] High-efficiency dust removal:

[0040] The coal plougher 3's coal drop opening is the main source of dust. The dust gas inlet pipe 5 is aligned with the coal drop opening, which can effectively capture dust-laden gas, reduce dust diffusion, and improve dust removal efficiency.

[0041] Pulse jet cleaning technology:

[0042] The pulse jet cleaning mechanism can periodically clean the coal dust on the surface of the filter bag 8, maintain the air permeability of the filter bag 8, extend the service life of the filter bag 8, and reduce manual maintenance costs.

[0043] Resource recycling:

[0044] Coal powder can be collected and recycled, avoiding resource waste and conforming to the concept of sustainable development.

[0045] Compact structure and highly adaptable:

[0046] The device of this utility model has a compact structure and is suitable for installation in the existing space of the coal conveyor belt 1 and the raw coal bunker 2 without occupying additional space.

[0047] Improve the work environment:

[0048] It effectively reduces dust emissions, improves workplace air quality, protects the health of employees, and meets environmental protection requirements.

[0049] Low operating costs:

[0050] The pulse jet cleaning system is highly automated, reducing manual intervention and lowering operating and maintenance costs. At the same time, the recycling of pulverized coal also saves on resource costs.

[0051] In this embodiment, a belt conveyor dust removal device is selected based on the on-site dust conditions during routine selection and installation to avoid poor dust removal performance due to insufficient filter elements.

[0052] In this embodiment, all electrical instruments used on site should be explosion-proof.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A belt conveyor dust removal device, comprising a raw coal bunker, a conveyor belt installed above the raw coal bunker, and a coal plow installed on the conveyor belt at a position corresponding to the raw coal bunker, characterized in that: It also includes a coal dust collector, which includes a coal dust collection shell with a hollow top cover at the top. Several gas inlets and outlets are opened on the lower surface of the hollow top cover. Multiple filter cages are installed under the hollow top cover, with the top of each filter cage connected to the gas inlets and outlets. Each filter cage is covered with a filter bag. A backflush gas inlet and a gas outlet are also opened on the hollow top cover. The backflush gas inlet and the gas outlet are respectively connected to a pulse jet cleaning mechanism and a gas emission device. A feed port is provided at the lower end of the coal dust collection shell, and a dust gas inlet pipe is fixed on the lower outer side of the coal dust collection shell. The gas inlet of the dust gas inlet pipe is aligned with the coal drop port of the coal plow.

2. The belt conveyor dust removal device according to claim 1, characterized in that: A guide chute is installed at the material inlet at the lower end of the coal powder collection shell, and the guide chute is located above the coal conveyor belt.

3. The belt conveyor dust removal device according to claim 1, characterized in that: The pulse jet cleaning mechanism includes an air tank, which is connected to the back-flushing gas inlet via a pipeline. An electromagnetic pulse valve is installed at the outlet of the air tank, and the electromagnetic pulse valve is equipped with a control system.

4. The belt conveyor dust removal device according to claim 1, characterized in that: The gas emission outlet is a dust removal fan.

5. A belt conveyor dust removal device according to claim 1, characterized in that: A dust collection hood is installed at the coal drop outlet of the plow.

6. A belt conveyor dust removal device according to claim 5, characterized in that: A dust curtain is installed at the coal drop outlet of the plow.

Images