How to save water in spraying production line？

In the process design of part of the spraying production line, after degreasing and phosphating, water replenishment treatment is performed separately, and fresh industrial water is not directly added to achieve the purpose of further water saving. At present, this water-saving method has been widely used in coating production lines.

Reverse treatment of overflow water cleaning. After degreasing or phosphating, it is necessary to wash with water several times to clean the chemicals attached to the surface of the workpiece. In order to save water, the pre-treatment washing process of the spraying production line is designed as two water-saving units, so that the washing water is discharged from the previous process tanks separately into a unit discharge, and the rear washing water supply is used, and the front washing tank is overflowed for water supply in sequence. , And finally discharged into the trench to improve the utilization rate of washing water.

Reasonably use new equipment to extend the tank renewal cycle;

1. Add a high-pressure water gun to the manual pre-dust removal station to reduce the processing burden of the subsequent processes of the coating production line.

2. In the hot water washing and pre-degreasing process, a suspension separation device is added to remove iron powder, silt and other impurities in the bath in time.

3. The oil-water separation device is added to the two steps of pre-degreasing and degreasing to separate the oil in the degreasing liquid in time and prolong the service life of the degreasing liquid.

4. Install a bag filter on the coating production line to filter impurities in the tank liquid and keep the tank liquid clean.

Reduce liquid transport between painting lines. Improve the structure of the object to be processed, change the hoisting and transportation methods, eliminate as much as possible the phenomenon of workpiece entrainment in the pre-treatment and electrophoresis process of the coating production line, reduce the workpiece entrainment, and greatly reduce the pre-treatment and cleaning water consumption after electrophoresis.

Use new materials to extend the service life of the tank. Traditional solvent-based middle and top coatings have a large VOC emission on the coating production line, causing serious pollution to the environment. In this regard, the coating industry in developed countries is researching and developing water-based coatings, powder coatings and high-solid content coatings, which can reduce environmental pollution, especially powder coatings, and eliminate the circulating water system, especially the use of dry spray equipment, which can be very good. The realization of water and energy saving.