CN114307474A

CN114307474A - Charged spray dust removal device

Info

Publication number: CN114307474A
Application number: CN202210039623.4A
Authority: CN
Inventors: 李小川; 卓宇轩; 常喜; 左丽; 张明瑞; 张峰
Original assignee: Xuzhou Zhongkai Mechanical & Electrical Equipment Manufacturing Co ltd; China University of Mining and Technology CUMT
Current assignee: Xuzhou Zhongkai Mechanical & Electrical Equipment Manufacturing Co ltd; China University of Mining and Technology CUMT
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-04-12

Abstract

The invention discloses a charged spray dust removal device, which comprises a charged spray system, a transition body, an observation window, a filter screen and a water outlet, solves the problem of low removal efficiency of industrial fine dust, replaces a traditional electrostatic dust removal polar plate with small liquid drops, improves the uniformity of an electric field, overcomes the difficulty that the polar plate is difficult to clean, improves the dust capture distance of the liquid drops relative to a traditional wet dust remover, improves the spray dust removal efficiency, and simultaneously has less power consumption because the whole charged ring is in an open circuit state.

Description

Charged spray dust removal device

Technical Field

The invention relates to the technical field of industrial pollution treatment, in particular to a technology for removing dust by charged spraying.

Background

The traditional dust removal technology comprises various dust removal modes such as mechanical dust removal, wet dust removal, filter dust removal, electric dust removal and the like. Specifically, mechanical dust removal mainly relies on mechanical force (gravity, inertial force, etc.) to remove dust in air; wet dust removal mainly relies on the use of inertial collisions or other effects of water droplets and particles to trap particles; the filter type dust removal mainly enables dust-containing gas to pass through a certain filter material to achieve the effect of separating particles from the gas; the electric dust removal mainly utilizes a high-voltage electric field to ionize smoke, and dust charges in air flow are separated from the air flow under the action of the electric field.

Because PM2.5 fine particles are very easy to cause occupational diseases such as pneumoconiosis and the like, a large amount of dust is inevitably generated in a factory, although the existing dust removal technology is relatively mature, the collection efficiency of the large particles can reach more than 90 percent and even 99.9 percent, but the dust removal efficiency of the micron-sized fine particles is very low, and therefore the removal of the PM2.5 dust particles is urgently needed to be solved.

Disclosure of Invention

Aiming at the problem of workshop air quality caused by low purification efficiency of industrial generated fine dust, the invention provides a method for capturing the fine dust in the air by utilizing charged droplets, which can realize efficient collection of the fine dust in the workshop and improve the quality of the workshop air, thereby ensuring the life health of workers.

The technical scheme of the charged spray dust removal device is that the charged spray dust removal device comprises a box body, a transition body, a water outlet and a charged spray system are arranged in the box body, the transition body is arranged at the air inlet of the box body, the sectional area of the transition body is increased from small to large in the air inlet direction and is finally equal to that of the box body, so that the transition body is better connected with the box body, the sectional area is increased from small to large, the sectional area of dust-containing gas is enlarged and the flow rate of the gas is reduced after the dust-containing gas passes through the transition body, the probability of meeting of the gas and small liquid drops is increased, the dust removal efficiency of the device is improved, the charged spray system consists of a spray head, a water pump, a water pipe and a charging ring, one pole of a power supply is connected with the charging ring, the other pole of the power supply is connected with the ground, and a metal device is connected with the ground, so that an electric potential difference is formed between the charging ring and the device, the water pump is connected with the spray head through a water pipe, the spray head is positioned above the charge ring, small liquid drops sprayed by the spray head can be ensured to have certain charges as far as possible, and the water outlet is positioned at the bottom of the box body.

Furthermore, the negative electrode of the power supply is connected with the charge ring to provide negative high voltage; the positive electrode is connected with the ground, a space electric field is formed between the electrode and the nozzle, so that liquid drops sprayed out of the nozzle are charged, direct charge transfer is not generated in the charging mode, and the electricity consumption is almost zero.

Furthermore, the bottom of the box body is an inclined plane, a water outlet is formed in the lowest position of the inclined plane, charged small liquid drops for capturing dust can be collected on the inclined plate at the bottom of the box body under the action of gravity, and finally the charged small liquid drops are reserved at the water outlet through the inclined plane and flow out of the equipment through the water outlet.

Furthermore, the charged spray dust removal device also comprises an exhaust fan, and dust-containing gas enters from the air inlet through the suction effect of the exhaust fan, so that the air inflow is improved, and the dust removal efficiency is improved.

Furthermore, the two transition bodies are respectively arranged at the air inlet and the air outlet of the box body and at the air outlet, and can quickly contract the air flow, so that liquid drops carried in the air can be collided with each other and the wall surface in the contraction section to be recovered, and the amount of the liquid drops carried in the air discharged by the dust remover is reduced; meanwhile, the transition section arranged at the air outlet can further increase the contact between the fine dust and the wall surface liquid film, and the dust removal efficiency is improved.

Furthermore, the box body is provided with an observation window, so that the capturing condition of the charged spraying system on dust in gas can be observed at any time, and when the equipment has problems, the equipment can be found out and stopped through the observation window in time, and the personal safety of workers is ensured.

Furthermore, a filter screen is arranged near the air outlet, so that the device can prevent charged small droplets from flowing to the outside along with air, reduce the water content in the air, and can perform secondary capture on dust escaping from the charged spraying system to perform secondary purification on dust-containing gas.

Furthermore, the water mist sprayed by the spray head is conical with the top angle of 80 degrees, and the diameter of the sprayed small liquid is between 50 and 136 micrometers.

Furthermore, the three nozzles of the charged spraying system are fixed on the upper part of the box body side by side and are vertical to the flowing direction of the airflow, and meanwhile, three charge ring conductors are connected in series, so that the three charge rings have high voltage, the whole pressurizing process is open circuit, one wire is connected to the charge rings, the other wire is grounded, the nozzles are placed side by side, water mist sprayed by the three nozzles is distributed on the sectional area of the box body, so that dust in gas does not have a space for escaping, partial water mist can be overlapped in the middle of the box body, the concentration of the middle water mist is higher, and in the process that the radial interface of the dust is enlarged, the concentration of dust particles in the center is greater than that of particles around, and the probability that the dust and small droplets meet is improved.

Furthermore, the three nozzles are respectively positioned at the center of the charge ring, the distance between the water spray holes of the nozzles and the bottom of the charge ring is 10-20 mm, and the nozzles are positioned at the center of the charge ring to ensure that small droplets sprayed by the nozzles all have certain charges as far as possible.

Compared with the prior art, the invention solves the problem of low efficiency of removing fine dust in industry, replaces the traditional electrostatic dust removal polar plate with small liquid drops, improves the uniformity of an electric field, simultaneously overcomes the problem that the polar plate is difficult to clean, selects the conical spray head with the vertex angle of 80 degrees and the diameter of the small liquid drop of 50-136 microns, and simultaneously sets the position relationship between the spray head and the charge ring, thereby improving the dust capturing distance of the liquid drop compared with the traditional wet dust remover, improving the dust removing efficiency by spray, simultaneously ensuring that the whole charge ring is in an open circuit state, having less electric consumption and almost zero electric consumption.

Drawings

FIG. 1 is a general structure diagram of an electrically charged spray dust-removing device;

FIG. 2 is a front and side view of the transition body;

FIG. 3 is a diagram of the relative position of the charge ring and showerhead;

fig. 4 is a sectional view of the case.

Reference numerals:

1-a box body; 2-a transition body; 3-a charged spray system; 4-observation window; 5-water outlet; 6-a spray head; 7-a water pump; 8-a water pipe; 9-charge ring; 10-filtering the screen; 11-an exhaust fan.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1, an embodiment of a charged spray dust collector includes a box 1, a transition body 2, a water outlet 5 and a charged spray system 3 are arranged in the box 1, the charged spray system 3 is composed of a spray head 6, a water pump 7, a water pipe 8 and a charged ring 9, one pole of a power supply is connected with the charged ring 9, the other pole is connected with the ground, the water pump 7 is connected with the spray head 6 through the water pipe 8, as shown in fig. 3, the spray head 6 is located above the center of the charged ring 9, so that small droplets sprayed by the spray head can be ensured to have certain electric charges as much as possible, and the water outlet 5 is located at the bottom of the box 1.

As shown in fig. 2, the transition body 2 is installed at the air inlet of the box body, the sectional area of the transition body 1 is increased from small to large from the air inlet direction and is finally equal to that of the box body 1, thereby being better connected with the box body 1.

In another embodiment shown in fig. 4, there is provided an electrically charged spray dust removing device, wherein there are three spray heads 6 of an electrically charged spray system 3, there are three electrically charged rings 9, the distance between the water spray hole of each spray head 6 and the bottom of the electrically charged ring 9 below the spray head is 15mm, the three spray heads 6 are fixed side by side on the upper portion of a box 1 and perpendicular to the flow direction of an air flow, and the three electrically charged rings 9 are connected in series through a conductor, so that the three electrically charged rings 9 all have a high voltage, the whole pressurizing process is an open circuit, one electric wire is connected to the electrically charged ring 9, the other electric wire is grounded, the spray heads 6 are arranged side by side, so that the water mist sprayed from the three spray heads 6 can be distributed on the cross section of the box 1, so that there is no space for dust in the air to escape, and there is a portion of water mist in the middle of the box 1 to overlap, so that the concentration of the middle water mist is high, and the dust is generated in the process of expanding the radial interface, the concentration of dust particles in the center is greater than that of particles around, so that the probability of meeting dust and small liquid drops is improved.

The filter screen 10 is arranged near the outlet, so that the device can prevent charged small droplets from flowing outside along with air, reduce the water content in the air, and can perform secondary capture on dust escaping from the charged spraying system to perform secondary purification on dust-containing gas.

The dust removal air inlet is connected with a pipeline, the pipeline extends to a plant dust generation source, a charged spraying system is firstly opened, so that a spray head 6 sprays water mist, a charged ring 9 is electrified, after the charged ring starts to work stably, a centrifugal exhaust fan is started, dust-containing gas enters from an air inlet through the suction effect of the centrifugal exhaust fan, the sectional area of the gas is gradually enlarged through a transition body, the flow rate of the gas is gradually reduced, small liquid drops sprayed by the spray head 6 float downwards under the action of gravity after the high voltage is applied to the charged ring 9, and finally the whole interface is filled with the small liquid drops. Dust in the gas can be collected the dust in the gas through the mutual collision of droplet and dust and the absorption attraction effect of electrified droplet to the dust when this part space, and the gas that is purified is passing through filter screen 10 before discharging, also can carry out secondary purification to the dust particulate matter in the air when reducing moisture in the air, and the droplet of catching the dust is on dropping the swash plate of bottom half under the effect of gravity, collects in the swash plate minimum, finally discharges through the outlet.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any minor modifications, equivalents and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a lotus electric spray dust collector includes box (1), be equipped with transition body (2), delivery port (5) and lotus electric spraying system (3) in box (1), transition body (2) are installed at box inlet port department, the sectional area of transition body (2) is from little grow, finally equal with box (1) sectional area, lotus electric spraying system (3) are become by shower nozzle (6), water pump (7), water pipe (8) and charge ring (9) four bibliographic categories, water pump (7) are connected with shower nozzle (6) through water pipe (8), shower nozzle (6) are located charge ring (9) top, a power supply utmost point is connected with charge ring (9), another utmost point is connected with ground, delivery port (5) are located the bottom of box (1).

2. The charged spray dust collector of claim 1, wherein the negative pole of the power supply is connected with the charge ring (9) to provide negative high voltage, and the positive pole is connected with the ground.

3. The charged spray dust collector according to claim 1, wherein the bottom of the box body (1) is an inclined surface, and the water outlet (5) is positioned at the lowest part of the inclined surface.

4. The charged spray dust collector according to claim 3, characterized by comprising an exhaust fan (11).

5. The charged spray dust collector according to claim 1, wherein the number of the transition bodies (2) is two, and the two transition bodies are respectively arranged at the air inlet and the air outlet of the box body (1).

6. The charged spray dust collector according to claim 1, wherein the box body (1) is provided with an observation window (4).

7. The charged spray dust collector according to any one of claims 1-6, wherein the filter screen (10) is arranged near the air outlet (10).

8. The charged spray dust collector according to claim 7, wherein the water mist sprayed by the spray head (6) is conical with an apex angle of 80 degrees, and the diameter of the sprayed small liquid is between 50 and 136 micrometers.

9. The charged spray dust collector according to claim 8, wherein the number of the spray heads (6) of the charged spray system (3) is three, the number of the charge rings (9) is three, the three spray heads (6) are fixed on the upper part of the box body (1) side by side, and the three charge rings (9) are connected in series through conductors and are connected with a power supply.

10. The charged spray dust collector according to claim 9, wherein three nozzles (6) are fixed on the upper part of the box body (1) side by side and are vertical to the flowing direction of the airflow.

11. The charged spray dust collector according to claim 10, wherein the three nozzles (6) are respectively positioned above the center of the charge ring (9), and the distance between the water spray holes of the nozzles (6) and the bottom of the charge ring (9) is 10mm-20 mm.