CN214437627U - Spraying exhaust gas recycling system - Google Patents

Abstract

The utility model relates to a waste gas treatment technical field discloses a spraying exhaust gas cyclic utilization system, including the paint spray booth, the venturi structure, first catch basin, washing unit, circulated air cabinet and combustion chamber, the exhaust end of paint spray booth is connected with the inlet end of venturi structure, and the drainage end of venturi structure is connected with the end of intaking of first catch basin, and the exhaust end of venturi structure is connected with the inlet end of washing unit, the inlet end of combustion chamber respectively, and the exhaust end of washing unit is connected with the inlet end of circulated air cabinet, and the exhaust end and the paint spray booth intercommunication of circulated air cabinet. The utility model discloses a preliminary separation of coating cloud and air is accomplished to the venturi structure, further separates remaining paint in to the air through the washing unit, carries out final separation through remaining paint in the circulated air cabinet to the air for the more thorough of coating cloud separation, the air can get into spray booth cyclic utilization simultaneously, the cost is reduced.

Description

Spraying exhaust gas recycling system

Technical Field

The utility model relates to a waste gas treatment technical field, in particular to spraying exhaust gas cyclic utilization system.

Background

The spraying is a processing method for atomizing paint by a spray gun and coating the paint on the surface of an object, and is mainly used for drawing patterns and characters on the surface of a hard object. The spraying is classified into compressed air spraying, airless spraying, electrostatic spraying, and the like. The spraying operation has high production efficiency, is suitable for manual operation and industrial automatic production, has wide application range, mainly belongs to the fields of hardware, plastic cement, furniture, war industry, ships and the like, and is the most common coating mode applied at present.

The spraying waste gas generated in the spraying process contains highly dispersed paint mist and volatilized solvent, and is discharged without treatment, so that the environment is polluted, the human health is not facilitated, the coating is wasted, and the economic loss is caused. For the treatment of the spraying waste gas, on one hand, the highly dispersed paint mist needs to be removed, and on the other hand, the volatile organic solvent with low concentration needs to be treated.

At present, the problems that paint mist is not thoroughly removed, the paint separation rate still cannot reach the environmental protection standard, the energy consumption is high and the like exist in the treatment process of spraying waste gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spraying exhaust gas cyclic utilization system to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

a spray coating exhaust gas recycling system comprising: paint spray booth, venturi structure, first catch basin, washing unit, circulated air cabinet and combustion chamber, the exhaust end of paint spray booth with the inlet end of venturi structure is connected, the drainage end of venturi structure with the end of intaking of first catch basin is connected, the exhaust end of venturi structure respectively with the inlet end of washing unit the inlet end of combustion chamber is connected, the exhaust end of washing unit with the inlet end of circulated air cabinet is connected, the exhaust end of circulated air cabinet with the paint spray booth intercommunication.

As a further improvement of the technical scheme, a pressure equalizing chamber is arranged in the paint spraying chamber and is communicated with the paint spraying chamber, and an exhaust end of the circulating air cabinet is communicated with the pressure equalizing chamber.

As a further improvement of the technical scheme, the water discharging end of the first water collecting tank is connected with the water inlet end of the Venturi structure.

As a further improvement of the technical scheme, the water washing unit sequentially comprises a packing layer, a spiral-flow plate spraying layer, a spraying layer and a spiral-flow defogging layer from bottom to top.

As a further improvement of the technical scheme, the filler layer is filled with hollow ball filler.

As a further improvement of the technical scheme, the distance between the swirling flow plate spraying layer and the spraying layer is 1-2 m.

As a further improvement of the technical scheme, the nozzles of the swirling flow plate spraying layer and the nozzles of the spraying layer are both of umbrella structures, and the diameter of the outlet aperture of each nozzle is 11-13 mm.

As a further improvement of the technical scheme, the drainage end of the water washing unit is connected with a second water collecting tank.

As a further improvement of the technical scheme, an F6 filter medium and an F8 filter medium are sequentially arranged in the circulating air cabinet along the gas flowing direction.

As a further improvement of the technical scheme, a constant temperature and humidity mechanism is further arranged in the circulating air cabinet and comprises a control chip, a temperature regulator and a humidity regulator.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses preliminary separation of coating cloud and air is accomplished through the venturi structure to spraying exhaust gas circulation utilization system, further separates remaining paint in to the air through the washing unit, carries out final separation through circulating air cabinet to remaining paint in the air for the more thorough of coating cloud separation, the air can get into spray booth cyclic utilization simultaneously, the cost is reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 100-a spray booth, 110-a pressure equalizing chamber, 200-a Venturi structure, 300-a first water collecting tank, 400-a water washing unit, 410-a filler layer, 420-a rotational flow plate spraying layer, 430-a spraying layer, 440-a rotational flow defogging layer, 500-a circulating air cabinet, 510-F6 filter media, 520-F8 filter media, 530-a constant temperature and humidity mechanism, 600-a combustion chamber and 700-a second water collecting tank.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, in an embodiment of the present invention, a spraying exhaust gas recycling system includes: spray booth 100, venturi structure 200, first catch basin 300, washing unit 400, circulating air cabinet 500 and combustion chamber 600, the exhaust end of spray booth 100 with the inlet end of venturi structure 200 is connected, the drainage end of venturi structure 200 with the end of intaking of first catch basin 300 is connected, the exhaust end of venturi structure 200 respectively with the inlet end of washing unit 400 the inlet end of combustion chamber 600 is connected, the exhaust end of washing unit 400 with the inlet end of circulating air cabinet 500 is connected, circulating air cabinet 500's exhaust end with spray booth 100 intercommunication. The venturi structure 200 is conventional in the art.

In some embodiments, a pressure equalizing chamber 110 is disposed in the paint spraying chamber 100, the pressure equalizing chamber 110 is communicated with the paint spraying chamber 100, and a discharge end of the circulating air cabinet 500 is communicated with the pressure equalizing chamber 110.

In some embodiments, the drain end of the first catch basin 300 is connected to the inlet end of the venturi structure 200.

In some embodiments, the water washing unit 400 comprises a packing layer 410, a cyclone plate spraying layer 420, a spraying layer 430 and a cyclone defogging layer 440 from bottom to top in sequence. Paint in the air is better separated through the cyclone plate spraying layer 420 and the spraying layer 430.

In some embodiments, the filler layer 410 is filled with a hollow sphere filler.

In some embodiments, the distance between the spray layer 420 and the spray layer 430 is 1-2 m, preferably 1.5m, and the distance can achieve the best paint mist separation effect.

In some embodiments, the nozzles of the swirling plate spraying layer 420 and the nozzles of the spraying layer 430 are both umbrella-shaped structures, and the outlet aperture of each nozzle is 11-13 mm, preferably 12.7mm, so that the large-aperture nozzles can rapidly spray water to neutralize paint in air and are not easily blocked by the paint.

In some embodiments, a second catch basin 700 is connected to the drain end of the water wash unit 400.

Specifically, A, B reagent can be put into both the first collecting tank 300 and the second collecting tank 700, and A, B reagent is a commercially available agent for removing paint mist, which is also called paint mist coagulant A and paint mist coagulant B. For example, the paint mist flocculating agent A is a macromolecular surfactant and the like, can capture paint overspray entering circulating water, wrap paint mist and penetrate and destroy functional groups in paint through chemical action, so that the viscosity of the paint mist is completely eliminated; the paint mist flocculating agent B mainly comprises a high-molecular cationic polymer, a surfactant and the like, according to the 'bridging' principle, the polymer is adsorbed on the surface of paint mist particles and is adsorbed on the surface of another paint mist particle, the paint mist particles which are detackified by the paint mist flocculating agent A are gathered, and finally, sponge-shaped massive floccules which can float upwards easily are formed, so that the fishing is facilitated and the water quality is kept clean.

In some embodiments, the circulating air cabinet 500 is provided with an F6 filter medium 510 and an F8 filter medium 520 in sequence according to the air flowing direction.

Specifically, the F6 filter media 510 includes a filtration layer composed of a material that achieves an F6 filtration rating, the material achieving an F6 filtration rating being commercially available; the F8 filter media 520 includes a filtration layer constructed of a material that achieves a F8 filtration rating, which is commercially available as a material that achieves a F8 filtration rating.

In some embodiments, a constant temperature and humidity mechanism 530 is further disposed in the circulating air cabinet 500, and the constant temperature and humidity mechanism 530 includes a control chip, a temperature regulator, and a humidity regulator. The constant temperature and humidity mechanism 530 is prior art and will not be described herein.

The utility model discloses a theory of operation: the waste gas of the spray nozzle of the spray chamber 100 is primarily separated through the venturi structure 200, one part of the waste gas is collected and processed by the first water collecting tank 300, one part of the waste gas is combusted and processed by the combustion chamber 600, one part of the waste gas is sent to the water washing unit 400 through the circulating air pipe, the air containing the paint moves upwards after being induced by air draft, and after passing through the hollow ball packing layer 410, the paint in the air is separated by the hollow ball packing and the water moving downwards in the rotational flow plate spraying layer 420 and is carried to the second water collecting tank 700; the air continues to move upwards, after moving to the spraying layer 430 at the upper end, the paint residual in the air is separated by the water moving downwards and is carried to the second water collecting tank 700, and when the air moves upwards, the paint residual in the air is finally neutralized by the cyclone defogging layer 440 and flows downwards to the second water collecting tank 700 along with the water; the air which is not much left enters the circulating air cabinet 500, the temperature and humidity of the air are adjusted (dehumidification/humidification and heating/refrigeration) through the circulating air cabinet 500, and the air is subjected to three-pass filtration, namely F6 (fine separation of paint particles), F6 (fine separation of paint particles) and F8 (pure separation of paint particles), so that the air is thoroughly purified and enters the paint spraying chamber 100 again, and the purpose of recycling can be met.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (10)

1. A spray coating exhaust gas recycling system, comprising: paint spray booth, venturi structure, first catch basin, washing unit, circulated air cabinet and combustion chamber, the exhaust end of paint spray booth with the inlet end of venturi structure is connected, the drainage end of venturi structure with the end of intaking of first catch basin is connected, the exhaust end of venturi structure respectively with the inlet end of washing unit the inlet end of combustion chamber is connected, the exhaust end of washing unit with the inlet end of circulated air cabinet is connected, the exhaust end of circulated air cabinet with the paint spray booth intercommunication.

2. The recycling system for spraying exhaust gas according to claim 1, wherein a pressure equalizing chamber is provided in the spray booth, the pressure equalizing chamber is communicated with the spray booth, and a discharge end of the circulating air cabinet is communicated with the pressure equalizing chamber.

3. The spray exhaust gas recycling system of claim 1, wherein a drain end of the first catch basin is connected to a water inlet end of the venturi structure.

4. The spraying exhaust gas recycling system of claim 1, wherein the water washing unit comprises a packing layer, a swirl plate spraying layer, a spraying layer and a swirl defogging layer from bottom to top in sequence.

5. The spray exhaust gas recycling system of claim 4, wherein the filler layer is filled with a hollow sphere filler.

6. The spraying exhaust gas recycling system of claim 4, wherein the distance between the swirling plate spraying layer and the spraying layer is 1-2 m.

7. The spraying exhaust gas recycling system of claim 4, wherein the nozzles of the swirling plate spraying layer and the nozzles of the spraying layer are both of an umbrella-shaped structure, and the diameter of the outlet aperture of each nozzle is 11-13 mm.

8. The spray coating exhaust gas recycling system of claim 1, wherein a second catch basin is connected to a drain end of the water scrubbing unit.

9. The recycling system for spraying exhaust gas of claim 1, wherein an F6 filter medium and an F8 filter medium are sequentially arranged in the circulating air cabinet along the gas flow direction.

10. The spraying exhaust gas recycling system of claim 9, wherein a constant temperature and humidity mechanism is further arranged in the circulating air cabinet, and the constant temperature and humidity mechanism comprises a control chip, a temperature regulator and a humidity regulator.

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