The cement factory produces many grinding processes, and the ambient air contains high concentrations of dust. The original design of the dust filter device used in the air compressor is mostly paper filter dust removal. Due to the small dust collection area, the filter paper is easy to block, and only large dust can be filtered, and the filtering effect is not good. Fine dust enters the air compressor through the suction pipe, and a part of the dust stays in the machine body, which aggravates the wear of the machine head. The parts such as the suction and exhaust valve piece, the valve seat and the spring must be disassembled and replaced every month. The cost of materials and accessories is high, the faults are many, and the equipment is inefficient, which increases the labor intensity of workers.

The original filter was replaced with an oil bath air filter. The filter is a new type of high-efficiency, low-noise air filter that integrates various dust-removing functions such as cyclone, oil bath, oil film and filter. Its function is to reduce the noise of the suction port, improve the environment and reduce the air compressor. Inhalation of dust and impurities contained in the air.

1, the principle of filtration

The air is sucked into the outer cylinder in the tangential direction, and rotates at high speed in the outer cylinder. The dust particles of the airflow are separated under the action of centrifugal force, and hit the outer cylinder wall and fall into the oil pool. When the airflow passes over the oil surface, it fluctuates, and the entrained part of the airflow rotates to form an oil film on the inner cylinder wall. The dust particles in the airflow adhere to the oil film and are separated again to obtain secondary purification. The oil film flows down the inner cylinder wall to form an oil curtain, and the air is subjected to an oil bath as it passes, so that some of the dust particles are separated. The airflow rotates upward in the inner cylinder, accelerates and rotates after passing through the swirling plate, and a part of the oil droplets entrained in the airflow passes through the oil return pipe through the bottom of the oil pipe, and a part flows back along the inner cylinder wall to wash the oil film on the wall of the cylinder. The trapped dust falls to the bottom of the cylinder to produce a new oil film; the airflow finally filters the smaller dust particles and oil droplets through the filter to achieve the purpose of purification. In this way, the lubricant can be changed regularly to ensure the filtration effect.

2, the problem should be paid attention to during use

We use oil bath air filter, pay special attention to the following points during installation, commissioning and use to ensure its use.

(1) The oil bath type air filter selected should be matched with the air compressor of the corresponding exhaust volume. Do not stack debris before the air inlet to ensure smooth air intake.

(2) Oil bath air filter can be installed inside and outside the machine room. Ensure level during the installation process.

(3) The oil used in the oil bath type air filter should be the same as the air compressor oil grade, and the oil can be maintained by the air compressor. The machine is not allowed to refuel when it is running.

(4) The oil level gap position is to indicate that the oil level is consistent.

(5) When the oil bath type air filter is used for the first time or after the cleaning, it is necessary to apply the lubricating oil evenly on the filter net.

(6) Whether the oil bath type air filter needs cleaning depends on the oil level sight glass.

5, application effect

(1) Low noise. According to the environmental protection department, the noise of the suction port of the oil bath type air filter is 80.6dB(A), which is lower than the national noise standard of industrial enterprises. It reduces the noise of the unit in the air compressor room and improves the working environment. Conducive to the physical and mental health of employees.

(2) The dust filter effect is good. After the air compressor was operated for several months, it was inspected and inspected, and almost no dust was observed in the air suction and exhaust device. The rated dust filter efficiency was 98.5%.

6, the conclusion

In summary, the oil bath air filter has good working performance. The unit can be used on single or multiple air compressor units. And it can be used for waste, with very good economic benefits and equipment benefits. For this reason, it is recommended that the oil bath type air filter be considered in the case where the working condition is not ideal.