Supergravity centrifugal wet dust removal device for underground coal mine

Abstract

The utility model discloses a supergravity centrifugal wet dust removal device for an underground coal mine, which is a purification device for air containing respirable dust, comprises a negative pressure air inlet, an air outlet, a spraying system, a rotary filter cartridge, a pollution discharge box, a power mechanism and the like, and is a device for separating solid-liquid-gas substances. Specifically, dust-containing gas is sucked into a machine body through negative pressure generated by a negative pressure axial flow fan, when the dust passes through a spraying area, the dust is mixed with water mist, the distribution volume of dust particles is reduced, then the dust particles are sucked into a rotary filter cartridge, and the filter cartridge is a filter screen which is of a multi-layer porous structure, facilitates gas passing and has a blocking effect on a solid-liquid mixture; and the rotary filter cartridge is a water-gas separation device and is used for further separating liquid from gas. Through reasonable matching of the negative pressure of the axial flow fan, the resistance of the filter element and the rotating speed of the roller, gas and a solid-liquid mixture can be separated, and emission of purified gas, recycling of purified liquid and collection of solid particles are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dust removal equipment, and in particular relates to a supergravity centrifugal wet dust removal device for underground coal mines. Background Art

[0002] In a rotating hypergravity field, a huge and rapidly updated phase surface will be generated between gas-liquid-solid multiphases, and the microscopic mixing and mass transfer process will be greatly enhanced. The molecular diffusion and interphase mass transfer process will be dozens of times higher than that under conventional gravity field conditions. Under hypergravity field conditions, the chemical reaction process is accelerated due to the improved mass transfer efficiency, and the linear velocity of the gas is also greatly increased, which doubles the unit volume processing efficiency and processing capacity of the device. It is used in the device to have both cross-flow washing and convection washing functions, making the washing capacity stronger.

[0003] Substances of different densities and shapes and sizes will encounter different resistances when passing through the filter element. At the same time, different centrifugal forces are generated under the action of the high-speed rotating filter, separating objects of different densities and shapes and sizes.

[0004] The solid-liquid-gas mixing process uses the negative pressure axial flow fan to provide negative pressure gas as the conveying medium, sucking the dust-containing gas into the outer cover of the filter cartridge, and at the same time, the liquid in the outer cover of the filter cartridge is continuously sprayed out in a wide-angle mist, filling the air inlet and the area outside the filter screen, and solid-liquid fusion is carried out in this area. According to the principles of air kinematics, through the reasonable matching of the suction negative pressure value with the filter resistance and the rotation speed, on the one hand, the solid-liquid mixture is away from the outer wall of the filter under a certain rotating centrifugal force; on the other hand, the gas with low density can pass through the filter element into the exhaust pipe, so that the solid-liquid mixture is separated from the gas, that is, the dust-containing air is purified. The solid-liquid mixture enters the sewage box under the action of centrifugal force and gravity, and the liquid is separated from the solid particles through sedimentation and multi-layer filter element filtration. The purified liquid is effectively reused, minimizing the pollution of dust particles to air and water.

[0005] The rotating filter designed in the dust removal device has a large air flow rate, which can effectively avoid the short-circuit phenomenon of the rotating surface airflow. Since the rotating filter has a certain resistance, reducing the outlet wind speed of the super-gravity machine can reduce the phenomenon of airflow carrying water. Because the rotating filter will never be blocked during the dust removal process under the action of super gravity, the filter resistance of the dust removal device is small, and the pressure drop of the negative pressure gas is small and stable.

[0006] The commonly used air filtration methods are:

[0007] (1) Dry filters, such as bag filters, paper filters, metal mesh filters and polyurethane filter elements. This type of air filtration has problems such as low dust removal efficiency, short service life, high maintenance cost, inconvenient maintenance, and unreliable operation under harsh environmental conditions.

[0008] (2) Wet filters mainly use spraying method, which has the characteristics of low cost and low efficiency and is not suitable for most workplaces.

[0009] (3) The existing supergravity dust collector has poor exhaust purification effect, which is mainly manifested in: low solid-liquid mixing efficiency, insufficient separation of solid, liquid and gas, and low purified gas exhaust efficiency. Summary of the invention

[0010] In view of the above-mentioned defects, the present invention provides an ultra-gravity centrifugal wet dust removal device for use in coal mines, which has a high dust removal efficiency and can achieve solid-liquid-gas separation.

[0011] A supergravity centrifugal wet dust removal device for use in coal mines comprises an air intake pipe, a spray assembly, and a rotary filter element in sequence according to the direction of gas flow. The outlet of the rotary filter element is connected to a negative pressure axial flow fan and a sewage box. The dust-containing gas enters the dust removal device through the air intake pipe. The spray assembly sprays water mist into the dust-containing gas to obtain a solid-liquid-gas mixture. The solid-liquid-gas mixture enters the rotary filter element for filtration and separation. The separated gas is discharged through the negative pressure axial flow fan, and the separated solid-liquid mixture is input into the sewage box.

[0012] Preferably, the inlet of the air intake duct is a negative pressure air inlet, which draws dust-containing air into the dust removal device; and the air intake duct is connected to an air intake hood.

[0013] Preferably, a filter cartridge cover is coaxially arranged on the periphery of the rotary filter element, a spray zone is formed between the outer wall of the rotary filter element and the inner wall of the filter cartridge cover, the spray assembly is arranged in the spray zone, and solid-liquid-gas mixing is performed in the spray zone.

[0014] Preferably, the spray assembly comprises a spray pipe, on which a plurality of spray heads are provided; the spray pipe is connected to a water source.

[0015] Preferably, a cleaning component is further provided in the spray area, and the cleaning component comprises a cleaning pipe, and a plurality of cleaning nozzles are provided on the cleaning pipe.

[0016] Preferably, the rotary filter element includes a filter cartridge, which has a main shaft in the center and end plates at both ends, and the end plates cooperate with the main shaft to fix the filter cartridge; a plurality of filter cartridge pressure rods are provided on the inner and outer walls of the filter cartridge to achieve radial limiting; sealing sleeves are provided at both ends of the filter cartridge to prevent negative pressure relief and liquid outflow.

[0017] Preferably, the filter cartridge pressure rod passes through the mounting end plate of the filter cartridge, and the end plate and the filter cartridge are fixed by threads at both ends of the filter cartridge pressure rod.

[0018] Preferably, the filter cartridge is formed by rolling up multiple layers of filter screens or fillers, with sealing covers provided at both ends and a clamp provided at the outer diameter of the filter cartridge.

[0019] Preferably, the sewage tank comprises a tank body, a tank cover, a multi-stage filter, a water outlet and a sewage outlet; the tank cover is provided with a water inlet, through which the solid-liquid mixture is input into the tank body; the middle part of the tank body is a filter tank, in which a multi-stage filter is arranged, and the filtered water is discharged through the water outlet on the tank body; the lower part of the tank body is a sedimentation tank, at the bottom of which a sewage outlet is arranged, and the sediment is discharged through the sewage outlet.

[0020] Preferably, the water outlet is connected to a return water pipe, and the return water pipe is connected to a water storage tank.

[0021] The beneficial effects of the present invention are:

[0022] (1) The dust removal device disclosed in the utility model adopts a spray device to quickly and fully combine dust and water mist, effectively reduce dust concentration, improve dust removal effect, and meet emission standards after one purification, with high dust removal efficiency;

[0023] (2) The high-speed rotation of the rotor of the dust removal device disclosed in the utility model generates a strong centrifugal force that throws the liquid toward the inner surface of the shell, forming a strong flushing force. Therefore, there is no scaling or clogging inside the shell at all times, and self-cleaning can be achieved. It is particularly suitable for separating dust that is easy to agglomerate, ensuring the long-term continuous and normal operation of the dust removal equipment;

[0024] (3) The filter element rotor components of the dust removal device disclosed in the utility model are all enclosed inside the filter cartridge cover, and the operation is safe and reliable;

[0025] (4) The dust removal device disclosed in the utility model has low maintenance costs, basically no consumables, no fixed cleaning cycle, no need to disassemble and clean, and is simple and convenient to maintain;

[0026] (5) The dust-containing gas to be treated by the dust removal device disclosed in the utility model does not require any pretreatment, and there are no restrictions or requirements on temperature, humidity, dust concentration, etc.;

[0027] (6) The dust removal device disclosed in the utility model occupies a small area and is easy to operate. It does not need to replace the original fan, and only adds a drive motor for the filter element rotor;

[0028] (7) The rotor and housing of the dust removal device disclosed in the utility model are all made of stainless steel and do not require anti-corrosion treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0030] Figure 1 Schematic diagram of the overall structure of the ultra-gravity centrifugal wet dust removal device of the embodiment of the utility model, wherein (a) is the main view, (b) is the left view, and (c) is the top view;

[0031] Figure 2 A sectional view of the front view of an embodiment of the utility model;

[0032] Figure 3 Schematic diagram of the structure of the filter element rotor of the embodiment of the utility model, wherein (a) is a cross-sectional view and (b) is a stereoscopic view;

[0033] Figure 4 This is a schematic diagram of the structure of the filter element of an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the spray and cleaning components of an embodiment of the utility model;

[0035] Figure 6 Schematic diagram of the structure of the sewage box of the embodiment of the utility model, wherein (a) is a cross-sectional view and (b) is a stereoscopic view.

[0036] Reference numerals:

[0037] 1-air inlet and air inlet cover, 2-filter cartridge cover, 3-spray assembly, 4-cleaning assembly, 5-air outlet, 6-frame, 7-drain box, 8-motor, 9-transmission mechanism, 10-water trough, 11-filter element rotor, 12-sealing sleeve;

[0038] 3.1-water inlet valve, 3.2-pipe joint, 3.3-spray pipe, 3.4-spray head, 3.5-blocking piece, 3.6-sealing ring, 3.7-fastener;

[0039] 4.1-cleaning nozzle, 4.2-cleaning pipe;

[0040] 7.1-liquid level viewing window, 7.2-box, 7.3-box cover, 7.4-multi-stage filter, 7.5-drain port, 7.6-multi-stage filter, 7.7-water outlet;

[0041] 11.1-front end plate, 11.2-rear end plate, 11.3-sealing sleeve, 11.4-main shaft, 11.5-filter cartridge pressure rod, 11.6-filter cartridge, 11.7-flow guide, 11.8-air outlet, 11.9-hoop, 11.10-, 11.11-sealing cover, 11.12-sealing cover, 11.13-sealing sleeve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The embodiment of the present invention provides a super gravity centrifugal wet dust removal device for underground coal mines. This product, as an air filtering and purification device, adopts a wet filtration method and combines super gravity centrifugal technology to purify the gas. Figure 1 (a)(b)(c) to Figure 2 As shown, the dust removal device is installed on a steel structure frame 6, including an air inlet cover 1, a filter cartridge cover 2, a spray assembly 3, a cleaning assembly 4, an air outlet 5, a sewage box 7, a motor 8, a transmission mechanism 9, a water trough 10, a rotary filter element 11 and a sealing sleeve 12, etc.

[0044] The air intake hood 1 includes two sections, one section is a trumpet-shaped inlet, and the other section is a horizontal straight pipe. The inlet is a negative pressure air inlet, which is in the dusty air. The trumpet-shaped inlet is used to inhale more air, and the horizontal straight pipe is used to transmit the dusty air to the spray component 3 and the cleaning component 4.

[0045] A filter cartridge cover 2 is provided below the air intake hood. The filter cartridge cover 2 is a highly symmetrical circular structure, which is suitable for the effective separation of gas and solid-liquid mixture by ultra-gravity centrifugal method. A rotating filter element is coaxially arranged inside the filter cartridge cover 2. A spray zone is formed between the inner wall of the filter cartridge cover 2 and the outer wall of the rotating filter element. A spray assembly 3 and a cleaning assembly 4 are arranged in the spray zone. The inner wall of the filter cartridge cover 2 is connected to the inner cavity of the air intake hood 1. An air guide plate is arranged inside the air intake hood 1 to allow dust gas to enter the spray zone. One end of the rotating filter element is an exhaust port for purified gas. When working, under the action of the filter cartridge and its rotating centrifugal force, the gas and the solid-liquid mixture (i.e., sewage) are quickly separated, and the purified gas is discharged through the guide member to the air outlet 5, and finally discharged through the negative pressure axial flow fan. The sewage flows into the water sump 10 arranged at the bottom of the filter cartridge cover 2, and the solid-liquid mixture flows into the sewage tank 7 through the drain pipe.

[0046] The spray assembly 3 and the cleaning assembly 4 include a water inlet valve 3.1 and a pipe joint 3.2, a cleaning nozzle 4.1, a cleaning pipe 4.2, a spray pipe 3.3, a spray head 3.4, a blocking member 3.5, a sealing ring 3.6 and a fastener 3.7, as shown in the attached Figure 5 As shown. The water source passes through the water inlet valve

[0047] 3.1, pipe joint 3.2 connects spray pipe 3.3 and cleaning pipe 4.2. Several spray pipe joints 3.2 and spray heads 3.4 are set on the spray pipe 3.3. In the filter cartridge outer cover 2, the liquid is continuously sprayed in a wide-angle mist, filling the spray area around the air inlet cover and the filter screen, and in this area, it undergoes solid-liquid fusion with the inhaled dust-containing gas to form a solid-liquid-gas mixture. In addition, a cleaning pipe 4 and a cleaning nozzle 3 are provided to clean the filter cartridge regularly.

[0048] The solid-liquid-gas mixture enters the rotating filter element for filtration and separation, the purified gas obtained by separation is discharged through the negative pressure axial flow fan, and the solid-liquid mixture obtained by separation is input into the sewage tank 7.

[0049] like Figure 3 As shown in (a)(a), the rotary filter element 11 includes a filter cartridge 11.6, a front end plate 11.1, a rear end plate 11.2, a filter cartridge pressure rod 11.5, a flow guide 11.7, an air outlet 11.8, a sealing sleeve 11.3 and a main shaft 11.4. The two ends of the filter cartridge 11.6 are respectively provided with a removable front end plate 11.1 and a rear end plate 11.2 for axial fixation. The inner and outer circles of the filter cartridge 11.6 are provided with a filter cartridge pressure rod 11.5 as a radial limit and protection. The central main shaft 11.4 serves to fix the filter element and transmit power. Both sides of the rotor of the rotary filter element 11 are connected to the sealing sleeve 11.3 to prevent the internal liquid from flowing out and the air flow from being depressurized. As shown Figure 4 As shown in the figure, the structure of the filter cartridge 11.6: the filter cartridge 11.6 is a cylindrical filter element formed by rolling up multiple layers of filter screens or fillers. In order to stabilize the structure, a clamp 11.9 is installed on the outer ring of the filter cartridge 11.6, and there are covers 11.10 and 11.11 at both ends to form a closed structure, making it an independent component. In order to achieve effective filtration, a comprehensive analysis of various influencing factors is carried out, and the filter cartridge structure size and the specifications and models of each layer of filter screen are determined by calculating the resistance value and centrifugal force.

[0050] The power drive structure of the dust removal device is a motor 8 and a transmission mechanism 9. The motor is connected to the rotor of the rotating filter element 11 through the transmission mechanism 9, so that the filter element rotates to filter objects of different densities; the filter element can filter objects of different shapes and sizes. One end of the filter element rotor 11 is installed on the adapter bearing seat, and the other end is connected to the motor 8 through the transmission mechanism 9.

[0051] like Figure 6As shown in (a) and (b), the sewage tank 7 is used to separate solid particles from liquid. The middle part of the sewage tank 7 is the outlet for purified liquid, and the bottom has a solid discharge port. Specifically, the sewage tank 7 includes a box cover 7.3, a box body 7.2, multi-stage filters 7.4 and 7.6, a water outlet 7.7 and a sewage outlet 7.5. The water inlet is located at the opening on the box cover 7.3. In this embodiment, the water inlet is located on the right side of the box cover 7.3 and enters the sewage tank 7 from the right side. The water outlet is set in the box body 7.2, located on the opposite side of the water inlet. Multi-stage filters 7.4 and 7.6 are vertically arranged in the sewage tank, and discharged from the water outlet 7.7 on the left side of the box body 7.2. The sedimentation tank is located at the lower part of the box body 2 of the sewage tank 7. The sedimentation tank is funnel-shaped, and a solid particle sewage outlet 7.5 is provided at the bottom of the sedimentation tank. A liquid level viewing window 7.1 is opened on the box body 7.2 to facilitate the staff to observe the storage situation in the box. The sewage first enters the filter tank of the sewage tank 7 from the water storage tank 10 through the drainage pipe, and passes through the multi-stage filters 7.4 and 7.6 from the right to the left in sequence. The filtered water enters the return pipe from the outlet 7.7 and returns to the water storage tank; the solid particles are discharged from the sewage outlet 7.5 to complete the solid-liquid separation.

[0052] The ultra-gravity centrifugal wet dust filter of the utility model is a horizontal structure as a whole, with a round top and a round bottom, and a symmetrical structure in design. The appearance is square in the front and arc in the rear, which is convenient for operators to control and adjust in the front and monitor the working position and use status of internal parts. The rotating parts are all enclosed in the outer cover and the protective cover, and the operation is safe and reliable.

[0053] The working principle of this utility model:

[0054] Objects of different shapes and sizes are subject to different resistances when passing through the filter; objects of different densities are subject to different centrifugal forces under the action of the high-speed rotating filter, so that substances of different densities can be separated. This new type uses negative pressure gas as the power and liquid as the medium to blend the dust-containing gas into the liquid to form a solid-liquid mixture, and finally discharge the purified gas into the atmosphere; after the solid-liquid mixture is filtered at multiple levels, the purified liquid is returned to the water storage tank for reuse; the solid dust particles are collected or recycled for reuse.

[0055] Airflow channel: Figure 1 As shown, the dust-containing gas is sucked in from the air inlet, and after entering the inner cavity of the air inlet hood 1, the water mist and dust merge in the spray area between the inner wall of the filter cartridge outer cover 2 and the outer wall of the filter cartridge of the filter element rotor 11, and the gas with low density passes through the filter cartridge. The purified gas passes through the guide piece to the air outlet, and is finally discharged into the atmosphere through the negative pressure axial flow fan.

[0056] Liquid flow channel: Figure 1As shown, the liquid enters the spray pipe and the cleaning pipe from the water inlet pipe and the valve, and is sprayed on the outer wall of the filter cartridge and the inner cavity of the air inlet cover through multiple wide-angle spray heads at different angles. The water mist merges with the dust particles, and the solid-liquid mixture moves away from the filter cartridge under the centrifugal force and resistance of the rotating filter cartridge, and is thrown onto the inner wall of the filter cartridge outer cover. Under the action of gravity, it flows into the water sump, and then into the sewage tank through the outlet pipe, where the liquid and dust particles are effectively separated, and the purified liquid returns to the water storage tank.

[0057] The parts of the new type that come into contact with liquid are all made of stainless steel. The relatively rotating parts and the positions where water and air pass are all connected with sealing parts to prevent water and air leakage.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A super gravity centrifugal wet dust removal device for underground coal mines, characterized in that: According to the gas flow direction, it includes an air intake pipe, a spray assembly, and a rotary filter element in sequence. The outlet of the rotary filter element is connected to a negative pressure axial flow fan and a sewage box. A filter cartridge cover is coaxially arranged on the periphery of the rotary filter element. A spray area is formed between the outer wall of the rotary filter element and the inner wall of the filter cartridge cover. The spray assembly is arranged in the spray area. The dust-containing gas enters the spray area through the air intake pipe. The spray assembly sprays water mist into the dust-containing gas to obtain a solid-liquid-gas mixture. The solid-liquid-gas mixture enters the rotary filter element for filtration and separation. The separated gas is discharged through the negative pressure axial flow fan. The separated solid-liquid mixture is input into the sewage box.

2. The dust removal device according to claim 1, characterized in that: The inlet of the air intake duct is a negative pressure air inlet, which sucks the dust-containing air into the dust removal device; the outer periphery of the air intake duct is covered with an air intake cover.

3. The dust removal device according to claim 1, characterized in that: The spray assembly comprises a spray pipe, on which a plurality of spray heads are arranged; the spray pipe is connected to a water storage tank.

4. The dust removal device according to claim 3, characterized in that: A cleaning component is also provided in the spraying area. The cleaning component comprises a cleaning pipe, and a plurality of cleaning nozzles are provided on the cleaning pipe.

5. The dust removal device according to claim 1, characterized in that: The rotary filter element includes a filter cartridge, which has a main shaft in the center and end plates at both ends. The end plates cooperate with the main shaft to fix the filter cartridge. A plurality of filter cartridge pressure rods are provided on the inner and outer walls of the filter cartridge to achieve radial limiting. Sealing sleeves are provided at both ends of the filter cartridge to prevent negative pressure release and liquid outflow.

6. The dust removal device according to claim 5, characterized in that: The filter cartridge pressure rod passes through the mounting end plate of the filter cartridge, and the end plate and the filter cartridge are fixed by threads at both ends of the filter cartridge pressure rod.

7. The dust removal device according to claim 5, characterized in that: The filter cartridge is formed by rolling up multiple layers of filter screens or fillers, with sealing covers at both ends and a clamp at the outer diameter of the filter cartridge.

8. The dust removal device according to claim 1, characterized in that: The sewage box includes a box body, a box cover, a multi-stage filter, a water outlet and a sewage outlet. The box cover is provided with a water inlet, through which the solid-liquid mixture is input into the box body; the middle part of the box body is a filter tank, in which a multi-stage filter is arranged, and the filtered water is discharged through the water outlet on the box body; the lower part of the box body is a sedimentation tank, and a sewage outlet is arranged at the bottom end of the sedimentation tank, through which the sediment is discharged.

9. The dust removal device according to claim 8, characterized in that: The water outlet is connected to a water return pipe, the water return pipe is connected to a water storage tank, and the water storage tank is connected to the spray assembly for providing water mist.

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