What are the problems existing in painting operation of automobile repair enterprises?

1. The car body grinding is not operated in a closed environment, most of it is open construction. Although the dust-free dry mill is used, there is still dust.

2. The paint mixing room was not equipped with waste gas treatment facilities, and the paint thinner bucket was not stored as required. The cleaning spray gun is not standardized and the cleaning facilities are not in place.

3. The waste gas treatment facilities installed at the end of the spray booth are too simple or the treatment devices are not in normal operation, the consumables are not replaced timely or directly, and there is no replacement record.

4. There is no operation and management account, including raw and auxiliary materials use account, pollution control facilities operation, hazardous waste transfer joint single account, etc.



How to eliminate such problems



Scheme 1) strengthen management

·≥ source substitution

Encourage the use of raw and auxiliary materials with low VOCs content or low volatility, such as coatings, cleaning agents and rust removers

Strengthen process control and standardize operation

The car body grinding process must be carried out in a closed environment, with air intake and exhaust system and dust collection device. Open operation is prohibited.

The painting and drying process must be carried out in a closed baking room, and open operation is prohibited

Use efficient painting equipment and regular training for painting workers to reduce rough operation and improve coating efficiency

The paint mixing room shall be equipped with activated carbon waste gas collection facilities, and closed gun washing equipment shall be used as far as possible. The waste cleaning agent and the waste paint of gun test before painting shall be recycled, and the recovery barrel shall be covered

Strengthen the collection and disposal management of hazardous wastes

Set up special storage places for hazardous wastes and collect them by classification; ground hardening measures shall be taken for hazardous waste storage sites according to regulations;

Establish hazardous waste identification marks, including not only storage sites, but also storage areas and hazardous waste classified storage barrels

Sign contracts with units with hazardous waste disposal qualification, and strictly implement the requirements of hazardous waste transfer joint sheet

Scheme 2) do a good job in account management

When adopting non in situ regeneration and adsorption treatment process, the usage amount and replacement cycle of adsorbent shall be determined according to the requirements of the approved design documents, and the adsorbent consumption per 10000 m3 / h design air volume shall not be less than 1 m3, and the replacement cycle shall not be longer than 1 month. The waste adsorbent should be disposed or comprehensively utilized, and the relevant contracts and bills for the purchase of adsorbent and waste adsorbent treatment shall be kept for at least three years.

Waste such as waste solvent, cotton yarn / rag stained with paint or solvent shall be put into sealed container with identification for regular treatment, and the treatment amount and destination shall be recorded

The following records shall be kept for at least three years. The records include but are not limited to the following contents:

The monthly usage, recovery and disposal of various VOC containing raw and auxiliary materials (coating, diluent, curing agent, cleaning agent, etc.);

The content of VOCs in each kind of raw and auxiliary materials containing VOCs;

Design air volume of paint spraying and baking room;

Replacement and disposal records of filter materials;

When using VOC pollution treatment facilities, the maintenance items should be recorded, and the main operating parameters should be recorded daily.