Energy-saving type small circulating wastewater treatment system for spray booth

Abstract

The utility model discloses an energy-saving type small circulating wastewater treatment system for a spray booth, which relates to the technical field of sewage treatment and comprises a spray booth body, a cyclone tower communicated with the spray booth body and a wastewater treatment mechanism positioned below the spray booth body and the cyclone tower, a paint mist washing system is arranged in the paint spraying chamber body, a first waste water pool is arranged below the paint mist washing system, a first waste water pipeline used for being communicated with the first waste water pool is arranged on the outer side of the paint spraying chamber body, the other end of the first waste water pipeline is communicated with a waste water treatment mechanism, and a first overflow pipe is arranged above the first waste water pipeline. According to the scheme, the overflow structures are arranged in the paint spraying chamber body and the cyclone tower, waste water in the paint spraying chamber body and the cyclone tower continuously overflows into the waste water treatment mechanism, continuous paint slag treatment is conducted, the overall structure is simple, the paint slag treatment effect is stable, energy can be saved, and the paint slag treatment efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of energy-saving type small circulation wastewater treatment systems for paint spray booth, belong to sewage treatment technical field. BACKGROUND

[0002] In traditional paint spraying process, paint residue treatment of paint spray booth has been a big problem, and in traditional paint spraying of automotive interior parts, small circulation water treatment method is often used to collect paint residue, and then physical or chemical method is used for paint residue treatment. This method is often inefficient, requires frequent replacement of treatment medium, has high energy consumption of treatment equipment, and unstable treatment effect. SUMMARY

[0003] The utility model aims at overcoming the deficiencies of prior art and provides an energy-saving type small circulation wastewater treatment system for paint spray booth.

[0004] To achieve the above object, the utility model adopts the technical scheme of an energy-saving type small circulation wastewater treatment system for paint spray booth, comprising a paint spray booth body, a cyclone tower in communication with the paint spray booth body, and a wastewater treatment mechanism located below the paint spray booth body and the cyclone tower.

[0005] A paint mist washing system is arranged in the paint spray booth body, a first wastewater pool is arranged below the paint mist washing system, a first wastewater pipeline for communicating the first wastewater pool is arranged on the outside of the paint spray booth body, the other end of the first wastewater pipeline is in communication with the wastewater treatment mechanism, a first overflow pipe is arranged above the first wastewater pipeline, one end of the first overflow pipe is in communication with the first wastewater pool, and the other end of the first overflow pipe is in communication with the first wastewater pipeline.

[0006] A second wastewater pool is arranged at the inner bottom of the cyclone tower, a second wastewater pipeline for communicating the second wastewater pool is arranged on the outside of the cyclone tower, the other end of the second wastewater pipeline is in communication with the middle part of the first wastewater pipeline, a second overflow pipe is arranged above the second wastewater pipeline, one end of the second overflow pipe is in communication with the second wastewater pool, and the other end of the second overflow pipe is in communication with the second wastewater pipeline.

[0007] A clean water return pipeline is arranged on the side of the wastewater treatment mechanism away from the first wastewater pipeline, one end of the clean water return pipeline is matched with the wastewater treatment mechanism, and the other end respectively leads to the inside of the cyclone tower and the inside of the paint spray booth body.

[0008] Preferably, the wastewater treatment mechanism comprises a wastewater treatment tank and a gas floatation tank, an acidification and hydrolysis tank, an aerobic tank, a biochemical sedimentation tank and a filter tank which are sequentially and communicatively arranged in the wastewater treatment tank, the lower end of the first wastewater pipeline is in communication with the gas floatation tank in the wastewater treatment tank, and the lower end of the clean water return pipeline is in communication with the filter tank in the wastewater treatment tank.

[0009] Preferably, a dissolved air tank is arranged outside the wastewater treatment tank and in communication with the gas floatation tank.

[0010] Preferably, a lifting pump is arranged on the clean water return pipeline and located on the clean water return pipeline close to the wastewater treatment mechanism.

[0011] Preferably, the second wastewater pipeline is provided with a switching pipeline with a bending structure at an end away from the cyclone tower, and the second wastewater pipeline is in communication with the middle part of the first wastewater pipeline through the switching pipeline.

[0012] Preferably, a first valve is arranged on the first wastewater pipeline and located between the paint spraying chamber body and the outer end of the first overflow pipe, and a second valve is arranged on the second wastewater pipeline and located between the cyclone tower and the outer end of the second overflow pipe.

[0013] Preferably, a first paint residue filter screen is arranged in the first wastewater tank close to the first wastewater pipeline, and a second paint residue filter screen is arranged in the second wastewater tank close to the second wastewater pipeline.

[0014] Thanks to the above technical scheme, the present application has the following advantages over the prior art:

[0015] 1. The overflow structure arranged in the paint spraying chamber body and the cyclone tower enables the wastewater in the paint spraying chamber body and the cyclone tower to continuously overflow into the wastewater treatment mechanism and continuously and uninterruptedly treat the paint residue, so that the overall structure is simple, the paint residue treatment effect is stable, energy can be saved, and the paint residue treatment efficiency is improved.

[0016] 2. The clean wastewater after treatment can be directly returned to the paint spraying chamber and the cyclone tower for reuse through the clean water return structure, so that zero wastewater discharge is achieved, and a small circulation waterway is formed between the paint spraying chamber, the cyclone tower and the wastewater treatment mechanism, which saves more than 100% of the electric energy compared with the traditional large circulation wastewater treatment, so that energy-saving and environmental protection are realized in the wastewater treatment. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical scheme of the present application will be further described below with reference to the drawings:

[0018] ATTACHED Figure 1 It is a structure schematic view of the energy-saving small circulation wastewater treatment system for a paint spraying chamber.

[0019] Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle;

[0020] Appendix Figure 3 This is a schematic diagram of the structure of the spray booth body described in this utility model;

[0021] Appendix Figure 4 This is a schematic diagram of the structure of the cyclone tower described in this utility model;

[0022] Appendix Figure 5 This is a schematic diagram of the wastewater treatment mechanism described in this utility model.

[0023] In the diagram: 1. Spray booth body; 11. Paint mist washing system; 12. First wastewater tank; 121. First paint sludge filter screen; 13. First wastewater pipe; 131. First valve; 14. First overflow pipe; 2. Cyclone tower; 21. Second wastewater tank; 211. Second paint sludge filter screen; 22. Second wastewater pipe; 221. Transfer pipe; 23. Second valve; 24. Second overflow pipe; 3. Wastewater treatment mechanism; 31. Wastewater treatment tank; 32. Flotation tank; 33. Acidification and hydrolysis tank; 34. Aerobic tank; 35. Biochemical sedimentation tank; 36. Filtration tank; 4. Clean water return pipe; 41. Booster pump; 5. Dissolved air tank. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] As attached Figure 1 As shown, the present invention discloses an energy-saving small-circulation wastewater treatment system for a paint booth, comprising a paint booth body 1, a cyclone tower 2 connected to the paint booth body 1, and a wastewater treatment mechanism 3 located below the paint booth body 1 and the cyclone tower 2; wherein the paint booth body 1 and the cyclone tower 2 can be connected by means of sealed pipes, fan assistance, etc.

[0026] The spray booth body 1 is equipped with a paint mist washing system 11, which is used to clean the paint residue inside the spray booth body 1. Specifically, it can adopt a structure of circulating pipes, circulating water pumps and water curtains or sprays. This structure is a mature technology commonly used in the field and will not be described in detail here.

[0027] As attached Figure 3As shown, a first wastewater tank 12 is provided below the paint mist washing system 11. The first wastewater tank 12 is used to collect wastewater and paint residue after cleaning the spray booth body 1. A first wastewater pipe 13 is provided on the outside of the spray booth body 1 to connect to the first wastewater tank 12. The other end of the first wastewater pipe 13 is connected to the wastewater treatment mechanism 3. A first overflow pipe 14 is provided above the first wastewater pipe 13. One end of the first overflow pipe 14 is connected to the first wastewater tank 12, and the other end of the first overflow pipe 14 is connected to the first wastewater pipe 13.

[0028] The first wastewater tank 12, located near the first wastewater pipe 13, is equipped with a first paint residue filter screen 121 to filter paint residue in the wastewater. The first wastewater pipe 13 is equipped with a first valve 131, which is located between the spray booth body 1 and the outer end of the first overflow pipe 14. The first valve 131 is used to control the opening or closing of the first wastewater pipe 13 and can also control the flow rate of the first wastewater pipe 13.

[0029] When the water level in the first wastewater tank 12 is low, the wastewater can be discharged into the wastewater treatment unit 3 through the first wastewater pipe 13. When the water level is high and reaches the inlet height of the first overflow pipe 14, the wastewater will overflow from the first overflow pipe 14 and merge into the first wastewater pipe 13, and finally flow into the wastewater treatment unit 3, so as to realize the uninterrupted overflow of wastewater in the first wastewater tank 12.

[0030] As attached Figure 2 and attached Figure 4 As shown, a second wastewater pool 21 is provided at the inner bottom of the cyclone tower 2, and a second wastewater pipe 22 is provided on the outer side of the cyclone tower 2 to connect the second wastewater pool 21. The other end of the second wastewater pipe 22 is connected to the middle of the first wastewater pipe 13. In this embodiment, a connecting pipe 221 with a bending structure is provided at the end of the second wastewater pipe 22 away from the cyclone tower 2. The second wastewater pipe 22 is connected to the middle of the first wastewater pipe 13 through the connecting pipe 221 so that the wastewater in the second wastewater pipe 22 and the wastewater in the first wastewater pipe 13 can be combined. A second overflow pipe 24 is provided above the second wastewater pipe 22. One end of the second overflow pipe 24 is connected to the second wastewater pool 21, and the other end of the second overflow pipe 24 is connected to the second wastewater pipe 22.

[0031] A second paint sludge filter screen 211 is installed in the second wastewater pool 21 near the second wastewater pipe 22. A second valve 23 is installed on the second wastewater pipe 22. The second valve 23 is located between the outer end of the cyclone tower 2 and the second overflow pipe 24. The second paint sludge filter screen 211 has the same function as the first paint sludge filter screen 121, and the second valve 23 has the same function as the lower valve.

[0032] When the water level in the second wastewater pool 21 is low, the wastewater can be discharged into the wastewater treatment mechanism 3 through the second wastewater pipeline 22, and when the water level is high and reaches the inlet height of the second overflow pipe 24, the wastewater will overflow from the second overflow pipe 24 and flow into the second wastewater pipeline 22, and finally flow into the wastewater treatment mechanism 3, so that the wastewater in the second wastewater pool 21 can continuously overflow.

[0033] As shown in the accompanying drawings Figure 1 and the accompanying drawings Figure 5 As shown in the accompanying drawings, the wastewater treatment mechanism 3 is provided with a clean water return pipeline 4 away from one side of the first wastewater pipeline 13, one end of the clean water return pipeline 4 is matched with the wastewater treatment mechanism 3, and the other end respectively leads to the inside of the cyclone tower 2 and the inside of the paint spraying chamber body 1, wherein a lifting pump 41 is arranged on the clean water return pipeline 4, and the lifting pump 41 is arranged on the clean water return pipeline 4 close to the wastewater treatment mechanism 3.

[0034] Specifically, the wastewater treatment mechanism 3 comprises a wastewater treatment tank 31 and a flotation tank 32, an acid hydrolysis tank 33, an aerobic tank 34, a biochemical sedimentation tank 35 and a filter tank 36 arranged in the wastewater treatment tank 31 in sequence, wherein a dissolved air tank 5 is arranged outside the wastewater treatment tank 31, the dissolved air tank 5 is connected with the flotation tank 32 through a pipeline, the dissolved air tank 5 is used to provide container water to the flotation tank 32, the lower end of the first wastewater pipeline 13 is connected with the flotation tank 32 in the wastewater treatment tank 31, and the lower end of the clean water return pipeline 4 is connected with the filter tank 36 in the wastewater treatment tank 31.

[0035] In work, the wastewater in the first wastewater pool 12 and the second wastewater pool 21 flows into the wastewater treatment tank 31 through the first wastewater pipeline 13 and the second wastewater pipeline 22, and the wastewater is treated by the flotation tank 32, the acid hydrolysis tank 33, the aerobic tank 34, the biochemical sedimentation tank 35 and the filter tank 36 in sequence, and then becomes clean water, the clean water is extracted by the lifting pump 41 and returns to the paint spraying chamber body 1 and the cyclone tower 2 through the clean water return pipeline 4 for recycling.

[0036] Among them, the flotation tank 32, the acid hydrolysis tank 33, the aerobic tank 34, the biochemical sedimentation tank 35 and the filter tank 36 are mature wastewater treatment methods in the art, and the specific working process is not described here.

[0037] The above is only a specific application example of the present application, and does not constitute any limitation on the protection scope of the present application; any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the present application.

Claims

1. An energy-saving small-circulation wastewater treatment system for spray booths, characterized in that: It includes a spray booth body (1), a cyclone tower (2) connected to the spray booth body (1), and a wastewater treatment mechanism (3) located below the spray booth body (1) and the cyclone tower (2); The spray booth body (1) is equipped with a paint mist washing system (11), and a first wastewater tank (12) is provided below the paint mist washing system (11). A first wastewater pipe (13) for connecting the first wastewater tank (12) is provided on the outside of the spray booth body (1). The other end of the first wastewater pipe (13) is connected to the wastewater treatment mechanism (3). A first overflow pipe (14) is provided above the first wastewater pipe (13). One end of the first overflow pipe (14) is connected to the first wastewater tank (12), and the other end of the first overflow pipe (14) is connected to the first wastewater pipe (13). The inner bottom of the cyclone tower (2) is provided with a second wastewater pool (21), and the outer side of the cyclone tower (2) is provided with a second wastewater pipe (22) for connecting the second wastewater pool (21). The other end of the second wastewater pipe (22) is connected to the middle of the first wastewater pipe (13). A second overflow pipe (24) is provided above the second wastewater pipe (22). One end of the second overflow pipe (24) is connected to the second wastewater pool (21), and the other end of the second overflow pipe (24) is connected to the second wastewater pipe (22). The wastewater treatment mechanism (3) is provided with a clean water return pipe (4) on the side away from the first wastewater pipe (13). One end of the clean water return pipe (4) is connected to the wastewater treatment mechanism (3), and the other end is connected to the interior of the cyclone tower (2) and the interior of the paint spraying chamber body (1).

2. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 1, characterized in that: The wastewater treatment unit (3) includes a wastewater treatment tank (31) and a flotation tank (32), an acidification hydrolysis tank (33), an aerobic tank (34), a biochemical sedimentation tank (35), and a filter tank (36) arranged in sequence within the wastewater treatment tank (31). The lower end of the first wastewater pipe (13) is connected to the flotation tank (32) within the wastewater treatment tank (31), and the lower end of the purified water return pipe (4) is connected to the filter tank (36) within the wastewater treatment tank (31).

3. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 2, characterized in that: A dissolved air tank (5) is provided on the outside of the wastewater treatment tank (31), and the dissolved air tank (5) is connected to the flotation tank (32).

4. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 1, characterized in that: A booster pump (41) is installed on the purified water return pipe (4), and the booster pump (41) is located on the purified water return pipe (4) on the side close to the wastewater treatment unit (3).

5. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 1, characterized in that: The second wastewater pipe (22) is provided with a bendable transition pipe (221) at the end away from the cyclone tower (2), and the second wastewater pipe (22) is connected to the middle of the first wastewater pipe (13) through the transition pipe (221).

6. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 1, characterized in that: A first valve (131) is provided on the first wastewater pipe (13), and the first valve (131) is located between the spray booth body (1) and the outer end of the first overflow pipe (14); a second valve (23) is provided on the second wastewater pipe (22), and the second valve (23) is located between the cyclone tower (2) and the outer end of the second overflow pipe (24).

7. The energy-saving small-circulation wastewater treatment system for a paint booth according to claim 1, characterized in that: A first paint sludge filter screen (121) is installed in the first wastewater pool (12) near the first wastewater pipe (13), and a second paint sludge filter screen (211) is installed in the second wastewater pool (21) near the second wastewater pipe (22).

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