CN100420506C - A trapping paint mist purification device - Google Patents

Abstract

The invention discloses a trapping paint mist purification device, which belongs to the field of exhaust gas treatment devices. A powder nozzle connected to the pipeline of the powder cabinet. The rear part of the front box is connected with the separated paint mist channel in the lower part of the rear box. A metal filter is installed at the connection part of the front and rear boxes. The metal filter is equipped with a dust filter. Cleaning device; the top or upper side of the rear box is connected with an air outlet pipe, the air outlet pipe is connected with an exhaust fan, and a dry filter device is arranged above the separation paint mist channel of the rear box. The invention has the advantages of novel structure, convenient use, good purification effect and no secondary pollution, and is used for the purification treatment of paint mist.

Description

A trapping paint mist purification device

technical field

The invention relates to an exhaust gas treatment device, in particular to a trapping paint mist purification device used for exhaust gas purification in a painting process.

Background technique

The painting process is widely used in mechanical equipment, electrical equipment, home appliances, automobiles, ships, furniture, toys, stationery, hardware and other industries. Environmental protection is an important issue that plagues the painting process. The spray paint mist is produced in the spray paint workbench where the workpiece is painted. According to the relevant data, the adhesion rate of the sprayed paint is usually only 20-30%. When spraying, the spray paint is atomized into a paint mist under high pressure. , Xylene and other aromatic hydroxyls, alcohols and other harmful substances, the sprayed paint mist and dust will disperse with the ambient airflow, causing serious pollution to the environment.

The traditional water curtain paint mist purification device commonly used in the painting process of various industries uses water pumps to form a jet overflow through water pipes, water curtain plates and water nozzles, and forms water mist in a waterfall state. As soon as the sprayed paint mist hits the The water mist will be absorbed by the water and rushed to the sewage tank for accumulation. Due to the use of circulating water, waste paint is easy to adhere to water pumps, water pipes and water nozzles and cause blockage. It needs to be cleaned manually once every 2 to 3 days, and the workload is heavy; the water curtain plate will cause discontinuous water flow due to the deposition of paint mist. Purification Low efficiency; spray circulating water needs to be discharged frequently and replaced every 2 to 3 days, which will inevitably cause secondary environmental pollution during use; water mist in the operation of the purification device will corrode all equipment and shorten the service life of all equipment , equipment maintenance costs are high; with the increasing water shortage in various places, rising water prices and limited water use have resulted in high operating costs, and the improvement of environmental protection laws and regulations requires purification of discharged sewage, which is also a considerable operating cost .

As far as water is not used, some manufacturers currently use dry spray paint mist filtration and purification devices to treat spray paint mist, which shows certain advantages. The dry spray paint mist filter and purification device changes the inertial force direction and impact rate of the paint mist particles through gradually dense multiple high-efficiency filter material fibers, so that the paint mist particles are separated from the spray paint mist. This is a water curtain spray paint mist purification device. incomparable. However, its operating cost is high, the dry paint mist filter material is expensive, and the blocky paint mist particle clusters are easy to stick to the filter screen, forming high resistance. After the paint mist particle capacity of the filter unit of the dry paint mist filter material reaches saturation , It is necessary to take out the dry filter, clean and beat the paint mist filter material, and the paint mist particles will splash, forming a new source of pollution.

Contents of the invention

The purpose of the present invention is to provide a trapping paint mist purification device with novel structure, convenient use, good purification effect and no secondary pollution.

The object of the present invention is achieved in the following way: a trapping paint mist purification device, including a front box body and a rear box body connected as one, wherein: the front part of the front box body is provided with a paint mist inlet, and There are multiple powder nozzles connected to the pipeline of the powder cabinet in the box, the rear of the front box is connected with the separated paint mist channel in the lower part of the rear box, and a metal filter is installed at the connection part of the front and rear boxes. The metal filter screen is equipped with a dust cleaning device; the top or upper side of the rear box is connected with an air outlet pipe, and an exhaust fan is connected to the air outlet pipe, and a dry type is installed above the separation paint mist channel of the rear box. filter device.

The powder nozzles described in the above-mentioned trapping paint mist purification device are distributed in the lower part of the front box body, and the retarder baffles arranged in an upper and lower interval are arranged in the front box body.

The metal filter screen described in the above-mentioned trapping paint mist purification device is installed on an elastic base, and the dust cleaning device is a vibrating motor; the dust cleaning device is controlled by the signal of the wind pressure sensor installed in the air outlet pipe.

In the above-mentioned trapping paint mist purification device, the paint mist separation channel at the lower part of the rear box is provided with a plurality of baffles arranged at intervals, and a winding separation channel is formed between the plurality of baffles.

The dry filter device described in the above-mentioned capture type paint mist purification device is composed of a dust filter screen or filter cartridge or filter bag and an activated carbon filter screen above it. The dust filter screen or filter cartridge or filter bag is provided with Blowback nozzles in communication with compressed air.

The outside of the paint mist inlet described in the above-mentioned capture type paint mist purification device is connected with a work cabinet, and a workbench is provided in the work cabinet to facilitate the collection of paint mist.

In the above-mentioned trapping paint mist purification device, the bottoms of the front and rear boxes are respectively provided with collection bins for easy cleaning.

After adopting the above-mentioned structure, the present invention adopts the combination of powder capture and dry filtration to treat the paint mist, which can improve the purification efficiency and reduce the operating cost. Harmful treatment provides a new way.

Description of drawings

The present invention will be described in further detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

Fig. 1 is a structural representation of a specific embodiment of the present invention;

Fig. 2 is a left side view of Fig. 1 .

Detailed ways

Referring to Figures 1 and 2, a trapping paint mist purification device of the present invention includes a front box 1 and a rear box 2 connected as one, and a paint mist inlet 3 is provided at the front of the front box 1 , the outside of the paint mist inlet 3 is connected with a work cabinet 16, and a workbench 17 is provided in the work cabinet 16 to facilitate the collection of paint mist; a plurality of powder nozzles 4 connected to the pipeline of the powder cabinet are provided in the front box 1, The powder nozzles 4 are distributed in the lower part of the front box body 1, and the slow speed baffles 13 arranged in the upper and lower intervals are arranged in the front box body 1, which can slow down the moving speed of the dust; the rear part of the front box body 1 and the rear box body 2 The separation paint mist channel 9 in the lower part is connected, and a metal filter 5 is provided at the connection part of the front and rear boxes 1 and 2, and the metal filter 5 is provided with a dust cleaning device 6, and the metal filter 5 is installed on an elastic base , the dust cleaning device 6 is a vibrating motor; the dust cleaning device 6 is controlled by the signal of the wind pressure sensor 14 arranged in the air outlet pipe 7 (the dust cleaning device 6 can also adopt a brush plate or other brush plates that move up and down along the metal filter screen 5 device commonly used in the prior art); the top of the rear casing 2 is connected with an air outlet pipe 7, and an exhaust fan 8 is connected on the air outlet pipe 7; The baffles 15 arranged at intervals are staggered, and a meandering separation channel is formed between multiple baffles 15 to slow down the speed of the paint mist and provide a longer separation time of the diluent; the separation paint mist channel of the rear box 2 9 is provided with a dry filter device 10 above, and the dry filter device 10 is composed of a dust filter screen or a filter cartridge or a filter bag 10a and an activated carbon filter screen 10b above it. In this embodiment, a dust filter bag is used. In the dust filter bag 10a There is a reverse blow nozzle 12 communicated with compressed air, and the reverse blow nozzle 12 is directly arranged on the pocket of the filter bag; the activated carbon filter screen 10b arranged on the top of the dust filter bag 10a can be plugged and connected with the rear box body 2 to It is convenient to clean and replace; the bottoms of the front and rear cabinets 1 and 2 are respectively provided with collection bins 18 for collecting settled dust for easy cleaning.

When the trapping paint mist purifying device of the present invention is in specific use, the paint mist formed by the atomization of the sprayed paint diffuses with the ambient air flow, and enters the front box 1 through the paint mist inlet 3, and the powder sprayed by the powder nozzle 4 at regular intervals Diffusely fill the inside of the front box 1, the powder can use various powders with good adsorption properties for paint mist, such as wood bran, activated carbon powder, flour, etc. The powder moves irregularly in the airflow, forming countless channels for paint mist Barrier, effectively intercepting and trapping paint mist particles. Each powder particle can repeatedly intercept and trap multiple paint mist particles. As the number of intercepted and trapped paint mist particles gradually increases, the weight of the powder particles gradually increases, generating large particles of dust. The powder captures, intercepts, and traps most of the paint mist particles, and some of the dust that absorbs the paint mist particles gathers on the metal filter 5, which gradually increases the resistance of the metal filter 5. Feedback control cleaning device 6 After receiving the signal from the wind pressure sensor 14, the metal filter screen 5 is automatically cleaned at the right time; a very small amount of paint mist dust passing through the metal filter screen 5 enters the separation paint mist channel 9, and in the winding channel, the paint that has moved chaotically for a certain distance The speed of the fog dust gradually slows down, the diluent mixed in the paint mist particles evaporates quickly, the paint mist particles and the diluent are fully separated, and under the suction force of the exhaust fan 8, most of the diluent passes through the dust filter bag 10a, and absolutely Most of the separated paint mist dust is retained by the dust filter bag 10a of the dry filter device 10 and stored in the filter material space, and the air purification rate reaches 99%. As the paint mist and dust accumulated in the dust filter bag 10a continue to increase, the control valve of the compressed air is triggered periodically, so that the compressed air is sprayed out from the reverse blowing nozzle 12, and the dust filter bag 10a is blown away, so that the dust filter bag 10a is blown in an instant. Rapidly expanding and accompanied by the reverse action of the air flow, the paint mist dust is shaken off, and the swept or shaken paint mist dust falls into the collection bin 18, which is collected and cleaned manually on a regular basis; the diluent molecules passing through the dust filter bag 10a are collected The high-efficiency activated carbon of the activated carbon filter screen 10b is adsorbed, and 70-80% of the diluent is removed.

Claims (7)

1. catching type paint mist purifying means, comprise the preceding casing (1) and the rear box (2) that link into an integrated entity, it is characterized in that: casing (1) front portion is provided with coating cloud import (3) before described, in preceding nationality body (1), be provided with a plurality of powder jets (4) that are connected with powder cabinet pipeline, the rear portion of preceding casing (1) is communicated with the coating cloud passage (9) that separates of rear box (2) bottom, connecting portion at preceding casing (1) and rear box (2) is provided with metal filter screen (5), and metal filter screen (5) is provided with dust cleaning plant (6); Described rear box (2) top or upper lateral part are connected with discharge pipe (7), on discharge pipe (7), be connected with air exhauster (8), separation coating cloud passage (9) top at rear box (2) is provided with dry type filter (10), described dry type filter (10) is made up of the activated charcoal strainer (10b) of dust-filtering net or cartridge filter or filter bag (10a) and its top, and dust-filtering net or cartridge filter or filter bag (10a) are provided with the blowback shower nozzle (12) with compressed air communication.

2. a kind of catching type paint mist purifying means according to claim 1 is characterized in that: described powder jet (4) is distributed in preceding casing (1) bottom, is provided with the slow baffle plate (13) that the dislocation of upper and lower interval is arranged in preceding casing (1).

3. a kind of catching type paint mist purifying means according to claim 1 and 2 is characterized in that: described metal filter screen (5) is installed on the elastic base, and dust cleaning plant (6) is a vibrating motor; Dust cleaning plant (6) is by wind pressure sensor (14) signal controlling that is arranged in the discharge pipe (7).

4. a kind of catching type paint mist purifying means according to claim 1 and 2, it is characterized in that: be provided with the baffle plate (15) that polylith misplaces at interval and arranges in the separation coating cloud passage (9) of described rear box (2) bottom, form the split tunnel of winding complications between the polylith baffle plate (15).

5. a kind of catching type paint mist purifying means according to claim 3, it is characterized in that: be provided with the baffle plate (15) that polylith misplaces at interval and arranges in the separation coating cloud passage (9) of described rear box (2) bottom, form the split tunnel of winding complications between the polylith baffle plate (15).

6. according to claim 1 or 2 or 5 described a kind of catching type paint mist purifying means, it is characterized in that: described coating cloud import (3) outside is connected with working cabined (16), is provided with workbench (17) in working cabined (16).

7. according to claim 1 or 2 or 5 described a kind of catching type paint mist purifying means, it is characterized in that: casing (1) is respectively equipped with collecting bin (18) with the bottom of rear box (2) before described.

Images