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Paint spraying wastewater treatment process

A waste water treatment and process technology, applied in waste paint treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems that affect the health of staff

Pending Publication Date: 2021-04-20
粤风环保(广东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the sewage contains microorganisms and organic matter, after a period of parking, it will produce harmful substances and odors, and the emission of harmful substances and odors will seriously affect the health of the staff. Therefore, there is still room for improvement

Method used

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  • Paint spraying wastewater treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of paint spraying wastewater treatment process, with reference to figure 1 , including the following steps:

[0047] Step 1, use a net to salvage the scum on the surface of the wastewater, place the scum in the sun to dry, and keep away from the places where people are active when drying the scum.

[0048] Step 2, pour hydrogen peroxide into the sewage where the scum has been salvaged, add 8.75mL hydrogen peroxide per 1L of sewage, hydrogen peroxide is hydrogen peroxide with a concentration of 35%, that is, add 25mL per 1L of sewage to a concentration of 35 % hydrogen peroxide, and then inject ozone into the sewage, the flow rate of ozone injection is 0.3m 3 / h, continuous injection for 2h, and continuous stirring at a speed of 30r / min by the stirring device.

[0049] Step 3, after the ozone injection is completed, stop stirring and let stand for 24 hours.

[0050] Step 4, put flocculant into the sewage, and keep stirring for 45 minutes by the stirring device ...

Embodiment 2

[0056] A kind of paint spraying wastewater treatment process, compared with embodiment 1, the difference only lies in:

[0057] Step 2, pour hydrogen peroxide into the sewage where the scum has been salvaged, add 11mL hydrogen peroxide to every 1L of sewage, hydrogen peroxide is hydrogen peroxide with a concentration of 27.5%, that is, add 40mL to every 1L of sewage with a concentration of 27.5% Hydrogen peroxide, and then inject ozone into the sewage, the flow rate of ozone injection is 0.4m 3 / h, continuous injection for 2h, and continuous stirring at a speed of 30r / min by the stirring device.

[0058] Step 3, after the ozone injection is completed, stop stirring and let stand for 48 hours.

Embodiment 3

[0060] A kind of paint spraying wastewater treatment process, compared with embodiment 1, the difference only lies in:

[0061] The flocculant is made of polyacrylamide, casein, amipyridine and methyldopa. The specific preparation method is as follows:

[0062] Grind 1kg of polyacrylamide, 0.28kg of casein, 0.015kg of amipyridine, and 0.007kg of methyldopa into powders with an average particle size of 0.5mm, and put the powdered raw materials into a stirring tank at a speed of 1200r / min, stirred for 5 min, the mixed powder mixture was put into a tablet machine, and compressed into cylindrical granules to obtain a flocculant.

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Abstract

The invention relates to the field of sewage treatment, and particularly discloses a paint spraying wastewater treatment process. The paint spraying wastewater treatment process comprises the following steps: step 1, salvaging dross, and drying and storing the dross; step 2, adding hydrogen peroxide into the sewage and introducing ozone; step 3, standing for 24 hours or more; step 4, adding a flocculating agent into the sewage, and uniformly stirring; and step 5, fishing. The flocculating agent is prepared from the following components in parts by mass: 100 parts of polyacrylamide, 25-30 parts of casein, 1-2 parts of amiopyridine and 0.5-0.8 part of methyldopa. The sewage treatment device has the advantages that the sewage does not need to be collected and accumulated for reducing the transportation cost, so that the condition that the sewage emits peculiar smell and harmful substances due to long-term storage is effectively avoided, and the influence on the body health of workers is reduced.

Description

technical field [0001] The application relates to the field of sewage treatment, more specifically, it relates to a process for treating waste water from spray painting and spraying. Background technique [0002] When spraying paint, in order to reduce the pollution of the paint to the air and the environment, it is usually necessary to block and absorb the floating paint by spraying water. Since the floating paint is mostly in the form of mist and the amount of floating paint is small, in order to save water, spray The spray water is usually recycled, and the floating paint is adsorbed many times until the spray water is nearly saturated, and the sewage is collected and treated. [0003] Therefore, the characteristics of spray paint spray wastewater are small water volume, high COD, high chroma, and the water contains resins, solvents, pigments, microorganisms, and heavy metals. Concentrated transportation to the sewage treatment plant for treatment. [0004] However, bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F103/14
Inventor 雷隆鸿白明超陆日明
Owner 粤风环保(广东)股份有限公司