Working principle

When the spray gun is spraying the workpiece, the paint sprayed by the spray gun can not all be adsorbed by the workpiece, so a lot of paint fog harmful to human body is produced.
These paint mist will be pumped with the exhaust fan behind the water tank after spraying, and each spray booth is equipped with an advanced paint fog capture system, which is mainly composed of water curtain plate, circulating sink, water supply system and spray washing system. The water curtain plate is facing the operating surface and is made of 1.2mm thick stainless steel plate. When the water flows on its surface, it does not break the flow, does not impact, and maintains a 2-3mm thick water film. Most of the spray paint mist and the water runoff on the surface of the curtain plate are fully mixed and fall into the circulation tank. The circulating tank is an above-ground tank made of 2mm thick cold plate or sus stainless steel. In order to keep the circulating water clean, the circulating water tank is provided with a certain amount of overflow, and the water flow direction in it can ensure that the captured paint mist is concentrated on the operating surface, which is easy to scoop up and handle. A filter is installed before the inlet of the circulating water pump. The water supply system consists of circulating pumps, valves, pipelines and overflow tanks. The circulating water pump pumped water from the circulating tank and pressurized into the water curtain overflow trough through the pipeline, and the water overflowed, forming a stable liquid flow on the surface of the water curtain. The valve is adjusted to control excess water from the bypass directly into the circulation tank, resulting in a steady flow of liquid on all surfaces of the curtain plate.
The spray washing system is located behind the curtain plate. It is divided into several groups, and each group consists of a row of nozzles. Not all incoming spray paint mist can be mixed with water on the surface of the curtain plate to be captured and fall into the circulation tank. The spray water washing system is the exhaust channel of the paint room, and the high-pressure water mist emitted by the nozzle can completely cover the whole section of the air collector, and further capture the over-painted mist, which is mixed with water and falls into the circulation tank. The capture rate of over-painted mist is as high as 90%.
The exhaust system of water curtain spray booth is mainly composed of baffle type steam separator, exhaust fan and several exhaust pipes. It belongs to large air volume and low concentration emission. The steam separator is located behind the water curtain plate and has a labyrinth structure, which can effectively separate and condense the water mist contained in the air and return it to the circulation tank to prevent water loss. The filtration system is all designed to be convenient and detachable for daily cleaning and maintenance.
The exhaust fan is placed on a steel support platform outside the operating room. A shock absorber is installed between the fan and the support, the air volume adjustment valve and a soft connection are arranged at the front of the fan inlet, and the "A" type connection transmission is provided between the motor and the fan. The air in the operating room can be extracted through the gap in the lower part of the water curtain, the spray type air collector and the steam separator exhaust fan. The air volume of the exhaust fan matches the air supply of the air supply system, so that a small positive pressure is formed in the operating room, and a stable air flow is formed on the painting operating surface. In order to ensure the uniformity of the painting on the surface of the workpiece, two sets of adjustable speed belt friction rotation devices are provided in the painting room, and the positive and reverse rotation speeds are :90~120rpm. The rear is equipped with a pressure supply chamber. The static pressure air supply room is provided with an air leveling layer and a patio screen. The clean air sent by the fresh air supply system is relatively stable and evenly pressed to the operation room after the pressure balancing chamber and then through the non-woven air leveling layer. The wind speed of the section of the operation area is designed according to 0.8m/s, and the total air supply volume is ≥19500m3/Hr. The air leveling chamber is made of 1.5mm high-quality galvanized steel plate.

Structure specification

Water curtain paint fog capture system: composed of stainless steel water curtain plate, water washing spray and water blocking louver.
Water supply system: composed of circulating pump, valve, water curtain overflow trough and pipeline.
Exhaust system: centrifugal exhaust fan, air volume regulating valve, air pipe and fan fixed shock absorber frame.

Product action

Purify the air, improve the spraying quality, improve the working environment conditions.