CN104857806A - Combined and cyclic integrated treatment process for paint spraying wastewater and waste gas and system for combined and cyclic integrated treatment process - Google Patents
Combined and cyclic integrated treatment process for paint spraying wastewater and waste gas and system for combined and cyclic integrated treatment process Download PDFInfo
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Abstract
The invention discloses a combined and cyclic integrated treatment system for paint spraying wastewater and waste gas and a process for the combined and cyclic integrated treatment system. The combined and cyclic integrated treatment process comprises the following steps: during combined and cyclic integrated treatment on paint spraying wastewater and waste gas, processing the waste gas generated by an automatic spray chamber through a paint mist treatment unit, entering a waste gas circulating unit, and carrying out aeration floating on wastewater with the circulating waste gas; when the concentration of an organic matter of the waste gas in the automatic spray chamber increases, carrying out final treatment on one part of waste gas by virtue of a waste gas terminal purification unit; circulating the wastewater generated by the automatic spray chamber to a wastewater circulating unit for spraying and washing the waste gas, and removing the paint mist in the waste gas; when the COD (chemical oxygen demand) concentration in the wastewater increases, enabling the wastewater to flow through a wastewater pretreatment unit and a wastewater advanced treatment unit, and circulating to the wastewater circulating unit for spraying and washing the waste gas. According to the combined and cyclic integrated treatment system and process, combined and cyclic integrated treatment is carried out on the paint spraying wastewater and waste gas, so that reduction of the paint spraying wastewater and waste gas and improvement of the treatment efficiency on the wastewater and the waste gas are facilitated; meanwhile, the investment can be reduced; the operating cost is reduced.
Description
Technical field
The invention belongs to field of waste treatment, be specifically related to a kind of painting wastewater waste gas combined cycle integrated processing technique and system thereof.
Background technology
Along with improving constantly of cost of labor, a lot of production all achieves automation, sprays this operation no exception to product surface.In auto spray painting process, because the volatilization of coating and organic solvent can produce some organic exhaust gas, due to the needs of coating cloud wet-treating, some waste water can be produced.The feature of lacquer spraying waste gas is that organic concentration is low, and air quantity is large, containing a large amount of noxious material such as benzene,toluene,xylene, butyl acetate; The feature of painting wastewater is that the water yield is few, and residue is many, and biodegradability is poor.If these waste water and gas without process directly discharge, not only can serious threat surrounding resident healthy, environmental quality also can be caused to worsen.The improvement of painting wastewater waste gas can not be ignored, must advanced treating qualified discharge.
The process of current painting wastewater waste gas is all carry out separately, namely set up special waste gas purification apparatus for the treatment of lacquer spraying waste gas, set up special waste water purification device for the treatment of painting wastewater, both are independent mutually, stronger for traditional hand spray production line applicability.Wherein traditional lacquer spraying waste gas purification techniques mainly includes machine solvent absorption, active carbon adsorption, Production by Catalytic Combustion Process and plasma photocatalysis method etc., and painting wastewater purification techniques mainly comprises By Bubble-floating Method, Coagulation Method, oxidizing process, biological treatment etc.The utility model patent being respectively CN201020575007.3, CN201320070229.3, CN201220467243.2 as publication number all discloses some painting wastewater treating apparatus, but all adopt independent wastewater treatment, and the process of waste gas is not taken into account.Application number is that multiple patents of CN201120175702.5, CN201020232485.4, CN201410561663.0 and CN201320557058.7 then disclose independent lacquer spraying waste gas treating apparatus.Although the independent treating apparatus of oil spout painting wastewater, painting wastewater waste gas process separately can effectively process pollution of spraying paint, there is the problems such as investment is large, occupation of land is many, operating cost is high, maintenance workload is large.For automatic spraying production line, the painting wastewater waste gas pollution control and treatment system of design integration and technique are a kind of useful explorations, not only can reduce investment outlay, and can also improve treatment effeciency, will be the trend of future development.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, and provide a kind of painting wastewater waste gas combined cycle integrated processing technique and system thereof, concrete technical scheme is as follows:
Painting wastewater waste gas combined cycle integrated processing technique, comprises the steps:
1) in airtight automatic paint-spraying booth, the waste gas that painting process produces is by after the washing of Water curtain wall, waste gas after washing utilizes spraying layer to carry out the spray of inverse airflow direction to the waste gas in pipeline in the process entering exhaust piping, waste gas after spray process is discharged after recycling primary filter and whole level filter depth removal coating cloud after removing steam by demister, and Water curtain wall washing and spray process all produce original waste water;
2) to step 1) COD of original waste water after process carries out Real-Time Monitoring, when the COD of the original waste water recorded is less than predetermined minimum, original waste water is directly disposed to discharge bay; When the COD recorded is greater than preset maximum value, add flocculant to original waste water, and carry out Air Exposure, the waste water after process is disposed to discharge bay again after advanced treating;
3) through step 1) process after discharge waste gas a part direct circulation return automatic paint-spraying booth, another part is used as step 2) described in the gas source of Air Exposure, and carrying out aeration by micropore aeration pipe, the gas after aeration enters automatic paint-spraying booth;
4) through step 2) be disposed to the waste water of discharge bay after process, promote rear portion and be used as step 1) in spraying layer carry out spraying the water source of process, another part together with fresh water as step 1) in the water source of Water curtain wall carrying out washing treatment.
Real-Time Monitoring is carried out by the organic exhaust gas concentration of gas detecting instrument to described auto spray painting indoor, after the concentration of the organic exhaust gas of auto spray painting indoor reaches preset upper limit value, by step 1) waste gas of volume fraction 30% ~ 50% after process directly discharges after being evacuated in waste gas terminal purifying apparatus and carrying out process, remainder of exhaust gas enters step 3 again) circulation; Utilizing fresh air to step 1 simultaneously) middle Water curtain wall washs and the original waste water of spray process generation carries out air-flotation process, gas after air supporting enters automatic paint-spraying booth, indoor by the tolerance of emission loss after the process of waste gas terminal purifying apparatus to maintain auto spray painting; When the concentration of the organic exhaust gas of auto spray painting indoor is lower than preset lower limit value, waste gas terminal purifying unit is closed no longer extraction waste gas and is processed, and Airfloat pump also closes stopping air supporting simultaneously.
The exhaust gas purifying method that described waste gas terminal purifying apparatus adopts is Production by Catalytic Combustion Process or low-temperature plasma photocatalysis method, and the method for wastewater treatment that the advanced treating of described waste water adopts is advanced oxidation processes or biological treatment.
Described preset upper limit value is less than 25% of organic exhaust gas lower explosive limit value, and described preset lower limit value is lower than described preset upper limit value.
Described step 4) in the direct circulation exhaust gas fraction that returns automatic paint-spraying booth be 90% ~ 95%.
Described step 5) in be sent to spraying layer and account for 30% ~ 50% of total wastewater volume for the waste water of spray washing.
In addition, the present invention also provides a kind of painting wastewater waste gas combined cycle integrated processing system using above-mentioned integral treatment method, and concrete technical scheme is as follows:
Use the painting wastewater waste gas combined cycle integrated processing system of described method design, wherein there are Water curtain wall, exhaust gas centralized gas hood, exhaust piping and gas detecting instrument in auto spray painting indoor, automatic paint-spraying booth bottom is provided with primary wastewater groove and secondary wastewater trough, Water curtain wall is arranged at the top of primary wastewater groove, Water curtain wall side is provided with exhaust gas centralized gas hood, exhaust gas centralized gas hood is connected with exhaust piping, has spraying layer and demister in exhaust piping, and demister is positioned at the top of spraying layer; Connection outlet air-introduced machine, primary filter and whole level filter successively after demister, whole level filter is connected with circulation air-introduced machine with automatic paint-spraying booth, and circulation air-introduced machine is connected with the micropore aeration pipe in secondary wastewater trough; Exhaust blower one end is connected with whole level filter, and the other end is connected with waste gas terminal purifying apparatus, and waste gas terminal purifying apparatus is connected with exhaust outlet; Primary wastewater groove and secondary wastewater trough are all separated by flase floor and automatic paint-spraying booth; Primary wastewater groove is connected with secondary wastewater trough, discharge bay successively, is provided with Airfloat pump and COD monitor in primary wastewater groove; Secondary wastewater trough is connected with dosing unit with Slag Scraping Device; Secondary wastewater trough is connected with the import of Sewage advanced treatment unit, and the outlet of Sewage advanced treatment unit is connected with discharge bay import; Discharge bay is connected with moisturizing unit with spraying layer respectively by circulating pump, and moisturizing unit is connected with Water curtain wall.
The filter that described primary filter and whole level filter are is core with dry filter material.
Described waste gas terminal purifying apparatus adopts catalytic combustion system or low-temperature plasma photocatalysis device.
Described Sewage advanced treatment unit adopts advanced oxidation sewage-treatment plant or biology sewage treatment equipment.
Paint booth water and waste gas are carried out combined cycle integrated treatment by the present invention, the waste water of circulation are used for the spray washing of waste gas, for removing coating cloud, the waste gas of circulation being used for the aeration air supporting of waste water, improve the efficiency of Wastewater Pretreatment.After waste gas constantly circulates, the organic concentration in waste gas raises, and is not only conducive to follow-up waste gas terminal purifying, also reduces the discharge capacity of waste gas.The beneficial effect that the present invention compared with prior art has is:
(1) painting wastewater and waste gas combined cycle integrated treatment, decrease the discharge capacity of paint booth water and waste gas;
(2) utilize the waste water of circulation to spray waste gas, remove coating cloud, improve the treatment effeciency of waste gas; Utilize the waste gas of circulation to carry out micro-pore aeration to waste water, improve the treatment effeciency of waste water;
(3) lacquer spraying waste gas of low concentration, huge discharge is carried out enrichment post processing by waste gas circulation process, improves the treatment effeciency of exhaust-gas treatment terminal, decreases equipment investment expense, reduces operating cost.
Accompanying drawing explanation
Fig. 1 is painting wastewater waste gas combined cycle integrated processing technique schematic flow sheet;
Fig. 2 is painting wastewater waste gas combined cycle integrated processing system structural representation;
In figure: automatic paint-spraying booth 1, automatic spray gun 2, primary wastewater groove 3, exhaust gas centralized gas hood 4, exhaust piping 5, spraying layer 6, demister 7, outlet air-introduced machine 8, primary filter 9, whole level filter 10, exhaust blower 11, waste gas terminal purifying apparatus 12, exhaust outlet 13, circulation air-introduced machine 14, secondary wastewater trough 15, micropore aeration pipe 16, Sewage advanced treatment unit 17, discharge bay 18, circulating pump 19, moisturizing unit 20, Water curtain wall 21, Slag Scraping Device 22, gas detecting instrument 23, dosing unit 24, Airfloat pump 25, COD monitor 26, flase floor 27.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further details.
As shown in Figure 1, painting wastewater waste gas combined cycle integrated processing technique, comprises the steps:
1) in airtight automatic paint-spraying booth, the waste gas that painting process produces is by after the washing of Water curtain wall, waste gas after washing utilizes spraying layer to carry out the spray of inverse airflow direction to the waste gas in pipeline in the process entering exhaust piping, waste gas after spray process is discharged after recycling primary filter and whole level filter depth removal coating cloud after removing steam by demister, and Water curtain wall washing and spray process all produce original waste water;
2) to step 1) COD of original waste water after process carries out Real-Time Monitoring, when the COD of the original waste water recorded is less than predetermined minimum, original waste water is directly disposed to discharge bay; When the COD recorded is greater than preset maximum value, add flocculant to original waste water, and carry out Air Exposure, the waste water after process is disposed to discharge bay again after advanced treating;
3) through step 1) process after discharge waste gas a part direct circulation return automatic paint-spraying booth, another part is used as step 2) described in the gas source of Air Exposure, and carrying out aeration by micropore aeration pipe, the gas after aeration enters automatic paint-spraying booth;
4) through step 2) be disposed to the waste water of discharge bay after process, promote rear portion and be used as step 1) in spraying layer carry out spraying the water source of process, another part together with fresh water as step 1) in the water source of Water curtain wall carrying out washing treatment.
Real-Time Monitoring is carried out by the organic exhaust gas concentration of gas detecting instrument to described auto spray painting indoor, after the concentration of the organic exhaust gas of auto spray painting indoor reaches preset upper limit value, by step 1) waste gas of volume fraction 30% ~ 50% after process directly discharges after being evacuated in waste gas terminal purifying apparatus and carrying out process, remainder of exhaust gas enters step 3 again) circulation; Utilizing fresh air to step 1 simultaneously) middle Water curtain wall washs and the original waste water of spray process generation carries out air-flotation process, gas after air supporting enters automatic paint-spraying booth, indoor by the tolerance of emission loss after the process of waste gas terminal purifying apparatus to maintain auto spray painting; When the concentration of the organic exhaust gas of auto spray painting indoor is lower than preset lower limit value, waste gas terminal purifying unit is closed no longer extraction waste gas and is processed, and Airfloat pump also closes stopping air supporting simultaneously.
The exhaust gas purifying method that described waste gas terminal purifying apparatus adopts is Production by Catalytic Combustion Process or low-temperature plasma photocatalysis method, and the method for wastewater treatment that the advanced treating of described waste water adopts is advanced oxidation processes or biological treatment.
Described preset upper limit value is less than 25% of organic exhaust gas lower explosive limit value, and described preset lower limit value is lower than described preset upper limit value.
Described step 4) in the direct circulation exhaust gas fraction that returns automatic paint-spraying booth be 90% ~ 95%.
Described step 5) in be sent to spraying layer and account for 30% ~ 50% of total wastewater volume for the waste water of spray washing.
In addition, present invention also offers a kind of painting wastewater waste gas combined cycle integrated processing system using described method:
As shown in Figure 2, Water curtain wall 21, exhaust gas centralized gas hood 4, exhaust piping 5 and gas detecting instrument 23 is had in automatic paint-spraying booth 1 in painting wastewater waste gas combined cycle integrated processing system, automatic paint-spraying booth bottom is provided with primary wastewater groove 3 and secondary wastewater trough 15, Water curtain wall 21 is arranged at the top of primary wastewater groove 3, Water curtain wall 21 side is provided with exhaust gas centralized gas hood 4, exhaust gas centralized gas hood 4 is connected with exhaust piping 5, and have spraying layer 6 and demister 7 in exhaust piping 5, demister 7 is positioned at the top of spraying layer 6; Connection outlet air-introduced machine 8, primary filter 9 and whole level filter 10 successively after demister 7, whole level filter 10 is connected with circulation air-introduced machine 14 with automatic paint-spraying booth 1, and circulation air-introduced machine is connected with the micropore aeration pipe 16 in secondary wastewater trough 15; Exhaust blower 11 one end is connected with whole level filter 10, and the other end is connected with waste gas terminal purifying apparatus 12, and waste gas terminal purifying apparatus 12 is connected with exhaust outlet 13; Primary wastewater groove 3 and secondary wastewater trough 15 are all separated by flase floor 27 and automatic paint-spraying booth; Primary wastewater groove 3 is connected with secondary wastewater trough 15, discharge bay 18 successively, is provided with Airfloat pump 25 and COD monitor 26 in primary wastewater groove 3; Secondary wastewater trough 15 is connected with dosing unit 24 with Slag Scraping Device 22; Secondary wastewater trough 15 is connected with the import of Sewage advanced treatment unit 17, and Sewage advanced treatment unit 17 exports and is connected with discharge bay 18 import; Discharge bay 18 is connected with moisturizing unit 20 with spraying layer 6 respectively by circulating pump 19, and moisturizing unit 20 is connected with Water curtain wall 21.
The filter that described primary filter 9 and whole level filter 10 are is core with dry filter material.Described waste gas terminal purifying apparatus 12 adopts catalytic combustion system or low-temperature plasma photocatalysis device.Described Sewage advanced treatment unit 17 adopts advanced oxidation sewage-treatment plant or biology sewage treatment equipment.
The automatic spray gun 2 used in painting process is arranged on the opposite side of the Water curtain wall relative with exhaust gas centralized gas hood 4.
The specific works method of this painting wastewater waste gas combined cycle integrated processing system is:
1) automatic paint-spraying booth 1 is relative with extraneous air isolates, automatic spray gun 2 pairs of workpiece of the inside start spray painting operation, produce the lacquer spraying waste gas containing a large amount of coating cloud, first waste gas wash through Water curtain wall 21, remove a part of coating cloud, under the effect of outlet air-introduced machine 8, the waste gas after Water curtain wall 21 washs enters exhaust piping 5 through exhaust gas centralized gas hood 4, and the waste water carrying coating cloud residue secretly flows into primary wastewater groove 3 from Water curtain wall 21.
2) waste gas entering exhaust piping 5 through step 1) is washed again by the recirculated water that spraying layer 6 sprays, and removes coating cloud further, and the waste water sprayed flows into primary wastewater groove 3 through exhaust gas centralized gas hood 4.Waste gas again after washing, removes steam through demister 7.
3) through step 2) from demister 7 waste gas out successively through outlet air-introduced machine 8, primary filter 9 and whole level filter 10, the degree of depth removes coating cloud, and so far, the coating cloud in waste gas is removed totally substantially.
4) waste gas removed after coating cloud through the degree of depth through step 3) is divided into two parts, a part (90% ~ 95%) loops back automatic paint-spraying booth 1, a part (5% ~ 10%) is extracted out the micropore aeration pipe 16 be connected in secondary wastewater trough 15 by circulation air-introduced machine 14, aeration is carried out to the waste water of secondary wastewater trough 15, waste gas after aeration overflows the water surface, is equivalent to get back to automatic paint-spraying booth 1.
5) through step 1) and step 2) flow into the waste water of primary wastewater groove 3, COD monitor 26 in primary wastewater groove 3 can carry out Real-Time Monitoring to the COD in waste water, when the COD recorded is less than predetermined minimum, the waste water in primary wastewater groove 3 can flow to discharge bay 18, recycles.When the COD recorded is greater than preset maximum value, the wastewater streams in primary wastewater groove 3 is to secondary wastewater trough 15.
6) after waste water enters secondary wastewater trough 3, dosing unit 24 starts dosing, flocculant is added in secondary wastewater trough 15, under the aeration effect of a part of waste gas looped back in step 4), suspension in flocculant and waste water carries out coagulation, condense into bulk residue to bubble through the water column, Slag Scraping Device 22 starts scrapes slag, removes residue.
7) waste water after step 6) flow to Sewage advanced treatment unit 17 from secondary wastewater trough 15, carries out advanced treating, and the clear water after purification flow to discharge bay 18.
8) water through step 5) and step 7) discharge bay 18 promotes through circulating pump 19, a part (30% ~ 50%) is sent in spraying layer 6 for spray washing, a part (50% ~ 70%) is sent to moisturizing unit 20, be injected in Water curtain wall 21 together with the fresh water in moisturizing unit 20, wash for Water curtain wall.
9) along with step 1) ~ 4) the carrying out of waste gas circulation, the concentration of the organic exhaust gas in automatic paint-spraying booth 1 can constantly raise, the gas detecting instrument 23 installed in automatic paint-spraying booth 1 can carry out Real-Time Monitoring to organic exhaust gas concentration, after the concentration of the organic exhaust gas in automatic paint-spraying booth 1 reaches preset upper limit value (preset upper limit value is less than 25% of organic exhaust gas lower explosive limit value), air draft opened by exhaust blower 11 in waste gas terminal purifying unit, be evacuated to 30% ~ 50% of step 3) waste gas out in waste gas terminal purifying apparatus 12 and process, waste gas after waste gas terminal purifying apparatus 12 processes reaches discharge standard, discharge from exhaust outlet 13.Meanwhile, the waste water in Airfloat pump 25 pairs of primary wastewater grooves 3 carries out air supporting, and under air supporting effect, coating cloud residue is floating to the water surface, and the replenish air after air supporting has arrived automatic paint-spraying booth 1, to maintain the tolerance in automatic paint-spraying booth 1.When the concentration of the organic exhaust gas in automatic paint-spraying booth 1 is lower than preset lower limit value (preset lower limit value is lower than above-mentioned preset upper limit value), exhaust blower 11 in waste gas terminal purifying unit cuts out, step 3) waste gas out carries out the circulation of step 4), and Airfloat pump 25 is also closed and stopped air supporting simultaneously.
embodiment:
Utilize painting wastewater waste gas combined cycle integrated processing technique of the present invention and system thereof, integrated treatment is carried out to the waste water and gas of furniture industry paint spray booth.
Wherein automatic paint-spraying booth is water curtain type paint spray booth, and auto spray painting room floor is stamped flase floor, and primary wastewater groove and secondary wastewater trough are arranged on below flase floor.Sprayed timber surface by fixing gun system, the waste gas of generation washs through Water curtain wall, removes a part of coating cloud, after under outlet air-introduced machine effect, (outlet air-introduced machine air quantity is 5000m
3/ h), through exhaust gas centralized gas hood, exhaust piping, spraying layer and demister, carry out spray washing, further removal coating cloud, the primary filter made through the multiple combustion-proof glass fiber material encrypted gradually from outlet air-introduced machine waste gas out and whole level filter, the coating cloud in waste gas obtains and purifies more thoroughly.The waste water of Water curtain wall, flow into the primary wastewater groove below automatic paint-spraying booth floor grating plate, and when the waste water COD concentration that COD monitor records is less than 500mg/L, the wastewater streams in primary wastewater groove is to discharge bay.When the waste water COD concentration that COD monitor records is greater than 1000mg/L, water in primary wastewater groove flow to secondary wastewater trough, dosing unit adds flocculant polyacrylamide (PAM) to secondary wastewater trough, suspension in PAM and waste water carries out coagulation, condense into bulk residue to bubble through the water column, automatic Slag Scraping Device starts scrapes slag, removes residue.Afterwards, the wastewater streams of secondary wastewater trough is to Sewage advanced treatment unit, and what Sewage advanced treatment unit adopted is Fenton oxidation method, and the clear water after process flow to discharge bay.The spraying layer that the water of discharge bay 30% is promoted to exhaust piping is used for waste gas spray by circulating pump, and 70% is promoted to moisturizing unit, and moisturizing unit is supplemented to Water curtain wall after adding a part of fresh water together with the water looped back.TOVC (TVOC) detector is installed, when the TVOC concentration recorded is greater than 500mg/m in automatic paint-spraying booth
3time, air draft opened by the exhaust blower in waste gas terminal purifying unit, and air quantity is 1500m
3/ h, is evacuated to waste gas out in whole level filter in waste gas terminal purifying apparatus and processes, and waste gas terminal purifying apparatus adopts dielectric barrier discharge (DBD) plasma in conjunction with photocatalysis apparatus, and the waste gas TVOC concentration of final process is less than 50mg/m
3, from exhaust outlet qualified discharge.Meanwhile, Airfloat pump carries out air supporting to the waste water in primary wastewater groove, and under air supporting effect, coating cloud residue is floating to the water surface, and the replenish air after air supporting has arrived automatic paint-spraying booth, to maintain the tolerance of auto spray painting indoor.Along with the TVOC concentration recorded when auto spray painting indoor is less than 100mg/m
3time, the exhaust blower in waste gas terminal purifying unit cuts out, and Airfloat pump stops carrying out air supporting to primary wastewater groove simultaneously.From whole level filter, 5% of waste gas out to be extracted out by circulation air-introduced machine and delivers in secondary wastewater trough that micropore aeration pipe is for the aeration of waste water in secondary wastewater trough, and other 95% direct circulation returns automatic paint-spraying booth.After the waste water of automatic paint-spraying booth and waste gas are carried out combined cycle integrated treatment, discharge amount of exhaust gas greatly reduces, and waste water reaches near-zero release, and implementation result is obvious.
Above-described embodiment is one of the present invention preferably scheme, and so it is not intended to limiting the invention, and all technical schemes taking the mode of equivalent replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.
Claims (10)
1. a painting wastewater waste gas combined cycle integrated processing technique, is characterized in that, comprise the steps:
1) in airtight automatic paint-spraying booth, the waste gas that painting process produces is by the washing of Water curtain wall, waste gas after washing utilizes spraying layer to carry out the spray of inverse airflow direction to the waste gas in pipeline in the process entering exhaust piping, waste gas after spray process removes steam by demister, discharge after recycling primary filter and whole level filter depth remove coating cloud, Water curtain wall washing and spray process all produce original waste water;
2) to step 1) COD of original waste water after process carries out Real-Time Monitoring, when the COD of the original waste water recorded is less than predetermined minimum, original waste water is directly disposed to discharge bay; When the COD recorded is greater than preset maximum value, add flocculant to original waste water, and carry out Air Exposure, the waste water after process is disposed to discharge bay again after advanced treating;
3) through step 1) process after discharge waste gas a part direct circulation return automatic paint-spraying booth, another part is used as step 2) described in the gas source of Air Exposure, and carrying out aeration by micropore aeration pipe, the gas after aeration enters automatic paint-spraying booth;
4) through step 2) be disposed to the waste water of discharge bay after process, promote rear portion and be used as step 1) in spraying layer carry out spraying the water source of process, another part together with fresh water as step 1) in the water source of Water curtain wall carrying out washing treatment.
2. painting wastewater waste gas combined cycle integrated processing technique as claimed in claim 1, it is characterized in that, Real-Time Monitoring is carried out by the organic exhaust gas concentration of gas detecting instrument to described auto spray painting indoor, after the concentration of the organic exhaust gas of auto spray painting indoor reaches preset upper limit value, by step 1) waste gas of volume fraction 30% ~ 50% after process directly discharges after being evacuated in waste gas terminal purifying apparatus and carrying out process, remainder of exhaust gas enters step 3 again) circulation; Utilizing fresh air to step 1 simultaneously) middle Water curtain wall washs and the original waste water of spray process generation carries out air-flotation process, gas after air supporting enters automatic paint-spraying booth, indoor by the tolerance of emission loss after the process of waste gas terminal purifying apparatus to maintain auto spray painting; When the concentration of the organic exhaust gas of auto spray painting indoor is lower than preset lower limit value, waste gas terminal purifying unit is closed no longer extraction waste gas and is processed, and Airfloat pump also closes stopping air supporting simultaneously.
3. painting wastewater waste gas combined cycle integrated processing technique as claimed in claim 2, it is characterized in that, the exhaust gas purifying method that described waste gas terminal purifying apparatus adopts is Production by Catalytic Combustion Process or low-temperature plasma photocatalysis method, and the method for wastewater treatment that the advanced treating of described waste water adopts is advanced oxidation processes or biological treatment.
4. painting wastewater waste gas combined cycle integrated processing technique as claimed in claim 2, it is characterized in that, described preset upper limit value is less than 25% of organic exhaust gas lower explosive limit value, and described preset lower limit value is lower than described preset upper limit value.
5. painting wastewater waste gas combined cycle integrated processing technique as claimed in claim 1, is characterized in that, described step 4) in the direct circulation exhaust gas fraction that returns automatic paint-spraying booth be 90% ~ 95%.
6. painting wastewater waste gas combined cycle integrated processing technique as claimed in claim 1, is characterized in that, described step 5) in be sent to spraying layer and account for 30% ~ 50% of total wastewater volume for the waste water of spray washing.
7. the painting wastewater waste gas combined cycle integrated processing system of a method design as claimed in claim 1, it is characterized in that, Water curtain wall (21) is had in automatic paint-spraying booth (1), exhaust gas centralized gas hood (4), exhaust piping (5) and gas detecting instrument (23), automatic paint-spraying booth bottom is provided with primary wastewater groove (3) and secondary wastewater trough (15), Water curtain wall (21) is arranged at the top of primary wastewater groove (3), Water curtain wall (21) side is provided with exhaust gas centralized gas hood (4), exhaust gas centralized gas hood (4) is connected with exhaust piping (5), spraying layer (6) and demister (7) is had in exhaust piping (5), demister (7) is positioned at the top of spraying layer (6), connection outlet air-introduced machine (8), primary filter (9) and whole level filter (10) successively after demister (7), whole level filter (10) is connected with circulation air-introduced machine (14) with automatic paint-spraying booth (1), and circulation air-introduced machine is connected with the micropore aeration pipe (16) in (14) secondary wastewater trough (15), exhaust blower (11) one end is connected with whole level filter (10), and the other end is connected with waste gas terminal purifying apparatus (12), and waste gas terminal purifying apparatus (12) is connected with exhaust outlet (13), primary wastewater groove (3) and secondary wastewater trough (15) are all separated by flase floor (27) and automatic paint-spraying booth, primary wastewater groove (3) is connected with secondary wastewater trough (15), discharge bay (18) successively, is provided with Airfloat pump (25) and COD monitor (26) in primary wastewater groove (3), secondary wastewater trough (15) is connected with dosing unit (24) with Slag Scraping Device (22), secondary wastewater trough (15) is connected with the import of Sewage advanced treatment unit (17), and Sewage advanced treatment unit (17) outlet is connected with discharge bay (18) import, discharge bay (18) is connected with moisturizing unit (20) with spraying layer (6) respectively by circulating pump (19), and moisturizing unit (20) is connected with Water curtain wall (21).
8. painting wastewater waste gas combined cycle integrated processing system as claimed in claim 7, is characterized in that, the filter that described primary filter (9) and whole level filter (10) are is core with dry filter material.
9. painting wastewater waste gas combined cycle integrated processing system as claimed in claim 7, is characterized in that, described waste gas terminal purifying apparatus (12) adopts catalytic combustion system or low-temperature plasma photocatalysis device.
10. painting wastewater waste gas combined cycle integrated processing system as claimed in claim 7, is characterized in that, described Sewage advanced treatment unit (17) adopts advanced oxidation sewage-treatment plant or biology sewage treatment equipment.
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| CN106277545A (en) * | 2016-09-30 | 2017-01-04 | 成都信息工程大学 | A kind of method of circulated sprinkling photocatalyst Cement Composite Treated by Plasma painting wastewater |
| CN106422602A (en) * | 2016-11-30 | 2017-02-22 | 郑州中拓知识产权代理有限公司 | Circulating type industrial waste gas treatment equipment |
| CN106621728A (en) * | 2016-11-21 | 2017-05-10 | 国佳环境科技湖北连锁有限公司 | Surface spray-coating waste gas treatment device and treatment method |
| CN107138013A (en) * | 2017-06-27 | 2017-09-08 | 深圳市睿维盛环保科技有限公司 | UV paint spraying waste gas treatment process |
| CN111085073A (en) * | 2020-01-13 | 2020-05-01 | 佛山市顺德区斯高家具有限公司 | Furniture preparation system with dust collector |
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| CN105135448A (en) * | 2015-10-08 | 2015-12-09 | 四川长城环境科学研究院 | Medical three-waste treatment system solving method and device |
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| CN111484184A (en) * | 2020-06-09 | 2020-08-04 | 骆向东 | Industrial sewage and waste gas coprocessing's integrated processing apparatus |
| CN114772824A (en) * | 2022-04-06 | 2022-07-22 | 许煜 | A waste water waste gas integration treatment facility for environmental protection |
| CN115180755A (en) * | 2022-05-11 | 2022-10-14 | 南京宇越水性涂料技术有限公司 | Waste gas and waste liquid treatment system in vehicle spraying process |
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