Paint spray mist dust removing and waste gas purification integrated machine

Abstract

In the prior art, on the market, in order to solve the paint spray mist and the waste gas treatment, the traditional process is mostly used, and comprises: a dust-free paint mist collecting pre-chamber constructed from a rock wool plate, a paint spray water curtain cabinet, a ventilation connecting pipeline, a water washing tower dust removal device, a ventilation connecting pipeline, a waste gaspurification device (active carbon adsorption concentrating device, photocatalytic waste gas purification device, low-temperature plasma waste gas purification device and the like), a centrifugal induced draft fan, and 15-m high-altitude discharge. The invention discloses a paint spray mist dust removing and waste gas purification integrated machine, wherein paint mist collecting, paint mist dustremoval and purification, paint spray waste gas purification, circulating water treatment, fan built-in function and other functions are integrated into the one device, and the technology belongs to the environmental protection field, and is used in various paint spraying and coating industries.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to an all-in-one machine for spraying paint mist, dust removal and waste gas purification. Background technique [0002] Now on the market, in order to solve the problem of spray paint mist and waste gas treatment, most of the traditional methods are used: positive pressure dust-free paint mist collection front room built by rock wool board + spray paint water curtain cabinet + ventilation connecting pipe + water washing tower dust removal equipment + Ventilation connecting pipes + exhaust gas purification equipment (activated carbon adsorption concentration device, photocatalytic exhaust gas purification device, low-temperature plasma exhaust gas purification device, etc.) + centrifugal induced draft fan + 15-meter high-altitude emission. [0003] 1: Since the painting front room is built with rock wool boards to collect positive pressure dust-free paint mist, the constructi...

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Problems solved by technology

[0003] 1: Since the painting front room is built with rock wool boards to collect positive pressure dust-free paint mist, the construction of the front room is relatively traditional. If the production process is changed, its mobility and secondary utilization rate are very low. Positive pressure dust-free paint mist The positive pressure filter cotton in the top of the collection front chamber is not equipped with a reciprocating automatic dust removal and dust purification device. Once the filter cotton has dust, it will affect the positive pressure, pressure air and paint mist collection rate. The solution is to replace all the filter cotton, which will not only Inflict economic burden on users, and at the same time generate new solid waste

[0004] 2: The traditional water curtain cabinet handles the paint mist by circulating the water pump to generate a water curtain on the water curtain plate. The principle of dust reduction is that when the paint mist gas passes through, it contacts with the water washed down by the water curtain instantly to achieve dust reduction. , the contact time is too short and the contact area is too small, so the dust removal effect is not obvious, and the water pump is easily blocked and burned by paint slag. On the blade, if there is too much adhesion, it will cause the blade to lose its dynamic balance, which will cause: the air volume will become smaller, affect the suction effect, the impeller will run eccentrically, and the motor will be overloaded, which will eventually lead to damage to the fan motor

[0005] 3: The traditional paint mist purification project is: water curtain cabinet + pipeline connection + spray water washing dust removal equipment + pipeline connection + dehydration and demisting equipment + pipeline connection + waste gas purification equipment + pipeline connection + induced draft fan + high chimney discharge process, It is embarrassing when the environmental protection department inspects, accepts, and samples, because when collecting the original exhaust gas samples, according to the regulations, it is not allowed to directly take samples from the ventilation connection pipe between the water curtain cabinet and the spray water washing dust collector. Because the sample sampling of the original paint mist exhaust gas cannot be purified by any purification equipment. If such sampling is performed, it is an illegal operation. However, before the paint mist enters the water curtain cabinet, due to structural limitations, it is impossible to sample, so now the market In general, most of the traditional engineering equipment is sampling in violation of regulations. In the water curtain cabinets currently on the market, the paint mist is mostly sucked in from the channel below the water curtain of the water curtain cabinet. When working, it will cause uneven air suction in the space. , it is easy to generate airflow vortex, which will affect the collection efficiency of paint mist exhaust gas

[0006] 4: The ventilation connecting pipe is the channel connecting various devices. Due to the low dust removal efficiency, thick paint mist molecules will adhere to the pipe after a long time, which will affect the air volume and effect of the system, and cause fire. The security risk is very big

[0007] 5: Water washing tower dedusting equipment has a long history in the environmental protection industry. It supplies water through a high-pressure water pump and sprays water on the packing through a spraying device. When the gas passes through the packing layer, it will disperse the air flow and increase the spray water and reverse air flow. Therefore, when the airflow passes through the filler layer, the pressure drop increases, the wind speed decreases, and there is sufficient contact time with the spray water, so that the dust removal efficiency is improved, but the paint slag cannot be salvaged automatically, and the filler layer is easily blocked by paint mist molecules , the replacement frequency of fillers is high, hazardous waste will be generated, the volume of the equipment is too large, and the water pump is easy to block and burn out. Due to the serious phenomenon of water at the outlet of the equipment, a small amount of paint molecules will eventually escape with the water mist, and the sewage from the equipment will not be well received. It is easy to handle, and there will be sewage. In winter in the north, it will not be usable due to freezing

[0009] A: The activated carbon adsorption and concentration purification device is direct and effective for the purification of spray paint exhaust gas, with high purification efficiency and small safety hazards, but the activity of activated carbon is periodic. Once the adsorption is saturated, it will lose its activity, and the activated carbon must be replaced. This will generate a lot of hazardous waste

[0010] B: Photocatalysis is through, the wavelength band of ultraviolet lamp is different, combined with photocatalyst to carry out photocatalytic oxidation reaction on organic waste gas, although the purification efficiency is high, but the ozone concentration at the discharge port is still high, causing irreparable damage to the natural environment harm

[0011] C: The efficiency of low-temperature plasma cracking and purification of organic waste gas is very high, but the requirements for the front-end dust removal and purification equipment are very high, and no paint dust should enter the plasma electric field, because the low-temperature plasma field is driven by a high-voltage pulse power supply , after the inter-electrode discharge, ions are generated. If the paint molecules adhere to the cathode and anode in the low-temperature plasma electric field, they will change. The discharge distance of the inter-electrode discharge will cause arcing. The main components of the paint molecules are: Resin, which will cause fire safety hazards

[0012] 7: In traditional environmental protection projects, multiple painting booths or painting stations are generally connected in parallel, and a set of traditional environmental protection projects is used to centrally deal with emissions. Such backward technology has many disadvantages

[0017] E: The traditional environmental protection project is very cumbersome, because it has no mobility at all. Once installed, it is not easy to move and change casually. If the user adjusts the production process layout or relocates the factory in the future, it will be a tragedy, because after the project is demolished The scrap rate is high and the secondary use rate is low

[0018] F: The technology of traditional environmental protection projects is very old, and it will bring various loopholes to users, such as direct discharge and stealth discharge, because with the improvement of the overall quality of the people, it is impossible for spray paint workers to work in an environment full of paint mist. Therefore, once the paint is sprayed in the workshop, they will find a way to discharge the paint mist and exhaust gas in the workshop directly or secretly to the outside to ensure the working environment of their workshop workers, which runs counter to the national environmental protection policy; We should innovate equipment and control them from the source of equipment such as paint spray dust removal and exhaust gas purification. All functions such as paint mist removal, exhaust gas purification, circulating sewage treatment, and built-in fans must be integrated into one, so that they want to secretly discharge more No row, only in this way, the blue sky of the motherland will be bluer

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