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Effect of powder cleaning on the life of filter element in electrostatic spray equipment

We all know that filter elements are an important part of the spray chamber powder recovery system. Its quality will directly affect the recovery of the electrostatic spray line. Therefore, whether the filter element can clean the filter cloth in a timely and effective manner during use. The accumulation of powder on the surface area is the key to affecting filtration efficiency and product life. There are four factors that usually affect the cleaning effect:

1. If the air pressure is too small, the powder on the surface of the filter element is absolutely shaken. If the strength of the filter element is allowed, the greater the impact pressure, the better.

2. The gas entering the solenoid valve through compressed air also affects the recoil effect. If the gas contains moisture and oil, the oil will penetrate into the filter and the plastic powder will stick together. At that time, atmospheric pressure will also hit. The powder on the surface of the filter cloth cannot be collected, so the air compressor in the powder spray booth must be equipped with a corresponding oil-water separation filter.

3. The quality of the filter material in the powder recovery filter itself also affects the powder cleaning effect. Compared with domestic filter materials, it is easier to remove powders using imported high-quality filter materials.

4. The appearance of the filter element can also directly affect the powder cleaning effect. The size and shape of the tapered filter element is more likely to fall off during a pulsed shock than conventional cylindrical filter elements. The bottom drain filter element slides the shaken powder directly to the bottom of the powder chamber. When the pulse is struck, the small diameter shallow pitch filter element can expand the filter cloth outward and rock the plastic powder onto the surface of the filter cloth.

Hanna reminds you that when the plastic powder is not cleaned during use, it is necessary to analyze the cause and then solve the problem. Keep in mind that these two methods are not advisable. First, don’t hit the filter surface directly with a stick. Second, do not wash the filter element with water. Since striking with a stick can cause damage to the surface of the filter cloth and the support mesh in the filter element will bend and contract, this will quickly result in the filter being scrapped. The filter element is washed with water. Water is a plastic powder that can be washed directly onto the surface of the filter cloth, but small particles of dust hidden in the filter fiber fibers will adhere to the paste once they encounter water and adhere to the fibers inside the filter material. This will result in insufficient airflow and increased resistance of the filter element, which will severely shorten the useful life of the filter element. In principle, we do not recommend that customers clean the filter element with water.

The above is Hanna, for everyone to clarify the knowledge of filter cleaning in electrostatic spraying equipment. If you need more details, please feel free to contact us.

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