CN112933837A - Paint spray booth waste gas treatment method - Google Patents
Paint spray booth waste gas treatment method Download PDFInfo
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- CN112933837A CN112933837A CN202110162014.3A CN202110162014A CN112933837A CN 112933837 A CN112933837 A CN 112933837A CN 202110162014 A CN202110162014 A CN 202110162014A CN 112933837 A CN112933837 A CN 112933837A
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- waste gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/91—Bacteria; Microorganisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a paint spray booth waste gas treatment method, relates to the technical field of paint spray booth waste gas treatment, and aims to solve the problems of high cost and poor treatment effect in the existing paint spray booth waste gas treatment process. Step 1: the waste gas is collected to a waste gas collecting chamber through a pipeline; step 2: the treated gas enters a dry paint mist filter through a suction fan to be filtered; and step 3: conveying the treated waste gas into an activated carbon adsorption box for impurity adsorption; and 4, step 4: introducing the treated gas into a low-temperature plasma treatment box; and 5: feeding the treated gas into an ultraviolet catalysis chamber for ultraviolet photolysis catalytic oxidation treatment; step 6: supplying the treated gas to a purification chamber for purification treatment; and 7: in the process that water generated by spraying and filtering flows in the channel, the channel and the outside perform heat exchange to naturally cool the wastewater; and 8: and conveying the cooled water to a water tank for cyclic utilization.
Description
Technical Field
The invention relates to the technical field of waste gas treatment of paint spray booths, in particular to a waste gas treatment method of a paint spray booth.
Background
Paint spraying is a very common surface treatment process, organic solvents such as benzene, toluene, xylene and non-methane total hydrocarbons in the paint which is widely used at present account for a large proportion, and the organic solvents can volatilize into the air in the process of paint spraying and drying to form pollution to the air.
The cost is higher in the process of treating the waste gas in the existing paint spray booth, and the treatment effect is not good; therefore, the existing requirements are not met, and a paint spray booth waste gas treatment method is provided for the existing requirements.
Disclosure of Invention
The invention aims to provide a paint spray booth waste gas treatment method to solve the problems of high cost and poor treatment effect in the existing paint spray booth waste gas treatment process in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a paint spray booth waste gas treatment method comprises the following steps:
step 1: the waste gas is collected to a waste gas collecting chamber through a pipeline, and then the paint spraying waste gas generated in the processing process is introduced into a spray tower through an air pump, so that particles in the waste gas are filtered;
step 2: the treated gas enters a dry paint mist filter through a suction fan to be filtered, and impurities and paint aerosol are filtered by using filter cotton and a bag filter in the dry paint mist filter;
and step 3: conveying the treated waste gas into an activated carbon adsorption box for impurity adsorption, wherein the waste gas sequentially passes through an airflow distributor and activated carbon in the activated carbon adsorption box;
and 4, step 4: introducing the treated gas into a low-temperature plasma treatment box, further adsorbing harmful particles which are not completely removed in the gas by using a fiber board, and then ionizing waste gas molecules by using discharge of a high-frequency discharge board to generate harmless products, wherein the harmless gas is discharged by a fan;
and 5: feeding the treated gas into an ultraviolet catalysis chamber for ultraviolet photolysis catalytic oxidation treatment, sterilizing and disinfecting, and simultaneously starting a heating device to enable the catalyst to be in a gaseous state after being heated, react with harmful substances in the waste gas and be oxidized and decomposed;
step 6: supplying the treated gas into a purifying chamber for purification treatment, and then carrying out standard reaching detection, wherein the gas is discharged to the atmosphere by a fan if the gas reaches the standard, and the gas continues to be treated if the gas does not reach the standard;
and 7: in the process that water generated by spraying and filtering flows in the channel, the channel and the outside perform heat exchange to naturally cool the wastewater;
and 8: and conveying the cooled water to a water tank for cyclic utilization.
Preferably, the purification treatment in step 6 is that the purification chamber comprises a first adsorption bed layer and a second adsorption bed layer, a pressure stabilizing and cooling zone is formed between the first adsorption bed layer and the second adsorption bed layer, and the waste gas is subjected to pressure stabilization and cooling in the pressure stabilizing and cooling zone after being treated by the first adsorption bed layer and then enters the second adsorption bed layer for purification treatment.
Preferably, the exhaust gas after filtering impurities and paint aerosol in step 2 enters the activated carbon adsorption tank at a speed of less than 0.4 m/s.
Preferably, the filter cotton in the step 2 is FRS-40 filter cotton, the thickness of the filter cotton is 20mm, and the efficiency specification of the bag filter is F5.
Preferably, the activated carbon in the step 3 is in a honeycomb shape.
Preferably, the water produced by the filtration is sprayed in step 7, and the pH value of the water ranges from 3 to 11.
Preferably, the temperature of the water naturally cooled in the step 7 is lower than 50 ℃.
Preferably, the fan has a discharge air velocity greater than the flow velocity in the exhaust duct.
Preferably, the pipeline adopts a corridor type structure.
Compared with the prior art, the invention has the beneficial effects that:
the waste gas and water are cooled by adopting a natural cooling mode, the increase of equipment cost is avoided, the heat exchange effect is good, impurities and paint aerosol are filtered by using filter cotton in a dry paint mist filter and a bag filter, the effective filtering treatment of the waste gas is ensured, particle impurities in the waste gas can be uniformly adsorbed by using an air flow distributor and the arrangement of active carbon, the dry treatment is carried out before the active carbon is adsorbed, the waste liquid can be prevented from being generated, the waste gas is treated by adopting ultraviolet photolysis catalytic oxidation, the gas can be effectively disinfected and sterilized, harmful substances can be oxidized and decomposed by heating a catalyst, the adsorption capacity of the active carbon is improved, and the treated waste gas can be timely discharged to the atmosphere by controlling the air speed of an exhaust fan to be higher than the flowing speed in a pipeline.
Drawings
FIG. 1 is a flow chart of a method for treating exhaust gas from a paint spray booth according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
A paint spray booth waste gas treatment method comprises the following steps:
step 1: the waste gas is collected to a waste gas collecting chamber through a pipeline, and then the paint spraying waste gas generated in the processing process is introduced into a spray tower through an air pump, so that particles in the waste gas are filtered;
step 2: the treated gas enters a dry paint mist filter through a suction fan to be filtered, and impurities and paint aerosol are filtered by using filter cotton and a bag filter in the dry paint mist filter;
and step 3: conveying the treated waste gas into an activated carbon adsorption box for impurity adsorption, wherein the waste gas sequentially passes through an airflow distributor and activated carbon in the activated carbon adsorption box;
and 4, step 4: introducing the treated gas into a low-temperature plasma treatment box, further adsorbing harmful particles which are not completely removed in the gas by using a fiber board, and then ionizing waste gas molecules by using discharge of a high-frequency discharge board to generate harmless products, wherein the harmless gas is discharged by a fan;
and 5: feeding the treated gas into an ultraviolet catalysis chamber for ultraviolet photolysis catalytic oxidation treatment, sterilizing and disinfecting, and simultaneously starting a heating device to enable the catalyst to be in a gaseous state after being heated, react with harmful substances in the waste gas and be oxidized and decomposed;
step 6: supplying the treated gas into a purifying chamber for purification treatment, and then carrying out standard reaching detection, wherein the gas is discharged to the atmosphere by a fan if the gas reaches the standard, and the gas continues to be treated if the gas does not reach the standard;
and 7: in the process that water generated by spraying and filtering flows in the channel, the channel and the outside perform heat exchange to naturally cool the wastewater;
and 8: and conveying the cooled water to a water tank for cyclic utilization.
Further, the purification treatment in step 6 is specifically that the purification chamber comprises a first adsorption bed layer and a second adsorption bed layer, a pressure stabilizing and cooling zone is formed between the first adsorption bed layer and the second adsorption bed layer, and the waste gas is subjected to pressure stabilization and cooling in the pressure stabilizing and cooling zone after being treated by the first adsorption bed layer and then enters the second adsorption bed layer for purification treatment.
Further, the waste gas after filtering impurities and paint aerosol in the step 2 enters the activated carbon adsorption tank at a speed of less than 0.4 m/s.
Further, the specification of the filter cotton in the step 2 is FRS-40 filter cotton, the thickness of the filter cotton is 20mm, and the specification of the efficiency of the bag filter is F5.
Further, the shape of the activated carbon in the step 3 is honeycomb-shaped.
Further, the water produced by filtering is sprayed in the step 7, and the pH value of the water is 3.
Further, the temperature of the water naturally cooled through the channel in the step 7 is lower than 50 ℃.
Further, the discharge air speed of the fan is larger than the flow speed in the waste gas pipeline.
Further, the pipeline adopts a corridor type structure.
Example 2
A paint spray booth waste gas treatment method comprises the following steps:
step 1: the waste gas is collected to a waste gas collecting chamber through a pipeline, and then the paint spraying waste gas generated in the processing process is introduced into a spray tower through an air pump, so that particles in the waste gas are filtered;
step 2: the treated gas enters a dry paint mist filter through a suction fan to be filtered, and impurities and paint aerosol are filtered by using filter cotton and a bag filter in the dry paint mist filter;
and step 3: conveying the treated waste gas into an activated carbon adsorption box for impurity adsorption, wherein the waste gas sequentially passes through an airflow distributor and activated carbon in the activated carbon adsorption box;
and 4, step 4: introducing the treated gas into a low-temperature plasma treatment box, further adsorbing harmful particles which are not completely removed in the gas by using a fiber board, and then ionizing waste gas molecules by using discharge of a high-frequency discharge board to generate harmless products, wherein the harmless gas is discharged by a fan;
and 5: feeding the treated gas into an ultraviolet catalysis chamber for ultraviolet photolysis catalytic oxidation treatment, sterilizing and disinfecting, and simultaneously starting a heating device to enable the catalyst to be in a gaseous state after being heated, react with harmful substances in the waste gas and be oxidized and decomposed;
step 6: supplying the treated gas into a purifying chamber for purification treatment, and then carrying out standard reaching detection, wherein the gas is discharged to the atmosphere by a fan if the gas reaches the standard, and the gas continues to be treated if the gas does not reach the standard;
and 7: in the process that water generated by spraying and filtering flows in the channel, the channel and the outside perform heat exchange to naturally cool the wastewater;
and 8: and conveying the cooled water to a water tank for cyclic utilization.
Further, the purification treatment in step 6 is specifically that the purification chamber comprises a first adsorption bed layer and a second adsorption bed layer, a pressure stabilizing and cooling zone is formed between the first adsorption bed layer and the second adsorption bed layer, and the waste gas is subjected to pressure stabilization and cooling in the pressure stabilizing and cooling zone after being treated by the first adsorption bed layer and then enters the second adsorption bed layer for purification treatment.
Further, the waste gas after filtering impurities and paint aerosol in the step 2 enters the activated carbon adsorption tank at a speed of less than 0.4 m/s.
Further, the specification of the filter cotton in the step 2 is FRS-40 filter cotton, the thickness of the filter cotton is 20mm, and the specification of the efficiency of the bag filter is F5.
Further, the shape of the activated carbon in the step 3 is honeycomb-shaped.
Further, the water produced by filtering is sprayed in the step 7, and the pH value of the water is 10.
Further, the temperature of the water naturally cooled through the channel in the step 7 is lower than 50 ℃.
Further, the discharge air speed of the fan is larger than the flow speed in the waste gas pipeline.
Further, the pipeline adopts a corridor type structure.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A paint spray booth waste gas treatment method is characterized in that: the method comprises the following steps:
step 1: the waste gas is collected to a waste gas collecting chamber through a pipeline, and then the paint spraying waste gas generated in the processing process is introduced into a spray tower through an air pump, so that particles in the waste gas are filtered;
step 2: the treated gas enters a dry paint mist filter through a suction fan to be filtered, and impurities and paint aerosol are filtered by using filter cotton and a bag filter in the dry paint mist filter;
and step 3: conveying the treated waste gas into an activated carbon adsorption box for impurity adsorption, wherein the waste gas sequentially passes through an airflow distributor and activated carbon in the activated carbon adsorption box;
and 4, step 4: introducing the treated gas into a low-temperature plasma treatment box, further adsorbing harmful particles which are not completely removed in the gas by using a fiber board, and then ionizing waste gas molecules by using discharge of a high-frequency discharge board to generate harmless products, wherein the harmless gas is discharged by a fan;
and 5: feeding the treated gas into an ultraviolet catalysis chamber for ultraviolet photolysis catalytic oxidation treatment, sterilizing and disinfecting, and simultaneously starting a heating device to enable the catalyst to be in a gaseous state after being heated, react with harmful substances in the waste gas and be oxidized and decomposed;
step 6: supplying the treated gas into a purifying chamber for purification treatment, and then carrying out standard reaching detection, wherein the gas is discharged to the atmosphere by a fan if the gas reaches the standard, and the gas continues to be treated if the gas does not reach the standard;
and 7: in the process that water generated by spraying and filtering flows in the channel, the channel and the outside perform heat exchange to naturally cool the wastewater;
and 8: and conveying the cooled water to a water tank for cyclic utilization.
2. The paint spray booth exhaust gas treatment method according to claim 1, wherein: and 6, specifically, the purification treatment in the step 6 is that the purification chamber comprises a first adsorption bed layer and a second adsorption bed layer, a pressure stabilizing and cooling area is formed between the first adsorption bed layer and the second adsorption bed layer, and the waste gas is subjected to pressure stabilization and cooling in the pressure stabilizing and cooling area after being treated by the first adsorption bed layer and then enters the second adsorption bed layer for purification treatment.
3. The paint spray booth exhaust gas treatment method according to claim 1, wherein: and the waste gas after filtering impurities and paint aerosol in the step 2 enters the activated carbon adsorption tank at a speed of less than 0.4 m/s.
4. The paint spray booth exhaust gas treatment method according to claim 1, wherein: the specification of the filter cotton in the step 2 is FRS-40 filter cotton, the thickness of the filter cotton is 20mm, and the specification of the efficiency of the bag filter is F5.
5. The paint spray booth exhaust gas treatment method according to claim 1, wherein: the shape of the activated carbon in the step 3 is honeycomb-shaped.
6. The paint spray booth exhaust gas treatment method according to claim 1, wherein: and spraying and filtering the water generated in the step 7, wherein the pH value of the water ranges from 3 to 11.
7. The paint spray booth exhaust gas treatment method according to claim 1, wherein: the temperature of the water naturally cooled through the channel in the step 7 is lower than 50 ℃.
8. The paint spray booth exhaust gas treatment method according to claim 1, wherein: the discharge wind speed of the fan is larger than the flow speed in the waste gas pipeline.
9. The paint spray booth exhaust gas treatment method according to claim 1, wherein: the pipeline adopts a corridor type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162014.3A CN112933837A (en) | 2021-02-05 | 2021-02-05 | Paint spray booth waste gas treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110162014.3A CN112933837A (en) | 2021-02-05 | 2021-02-05 | Paint spray booth waste gas treatment method |
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| CN112933837A true CN112933837A (en) | 2021-06-11 |
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| CN202110162014.3A Pending CN112933837A (en) | 2021-02-05 | 2021-02-05 | Paint spray booth waste gas treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515669A (en) * | 2021-12-30 | 2022-05-20 | 广东银纳增材制造技术有限公司 | Paint spraying equipment with waste gas filtering function |
| CN115213044A (en) * | 2022-08-03 | 2022-10-21 | 昆山科亮精密科技有限公司 | Spraying equipment and spraying process capable of automatically discharging waste |
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| CN111117677A (en) * | 2020-01-19 | 2020-05-08 | 中国林业科学研究院林产化学工业研究所 | Solid waste gasification coupling biomass pyrolysis product gaseous hydrogenation device and use method thereof |
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2021
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| JP2003089696A (en) * | 2001-09-19 | 2003-03-28 | Shingo Kaneko | Method for removing dioxin by catalyst ion-plasma reaction and device for removing the same |
| CN105299654A (en) * | 2014-06-25 | 2016-02-03 | 金广恒环保技术（南京）有限公司 | System for treating hazardous waste through plasma |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515669A (en) * | 2021-12-30 | 2022-05-20 | 广东银纳增材制造技术有限公司 | Paint spraying equipment with waste gas filtering function |
| CN115213044A (en) * | 2022-08-03 | 2022-10-21 | 昆山科亮精密科技有限公司 | Spraying equipment and spraying process capable of automatically discharging waste |
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Application publication date: 20210611 |