Self-cleaning method of high-temperature filtering system and high-temperature filtering system

Abstract

The invention provides a self-cleaning method of a high-temperature filtering system and the high-temperature filtering system. According to the cleaning method, when the high-temperature filtering system performs pollution discharge, a water-gas mixture quickly flows to the surface of a filter and flows out along the tangential direction of the outer surface of the filter, so that impurities accumulated on the outer surface of the filter are washed away; meanwhile, the water-gas mixture rapidly and obliquely flowing out from the outer surface of the filter flows to the outer surface of a sewage discharge valve, so that a high-speed vortex is formed on the outer surface of the sewage discharge valve to conveniently wash away impurities on the outer surface of the sewage discharge valve; and the sampled sample water-gas mixture is introduced to the outer surfaces of a high-temperature filter element and the sewage discharge valve, so that the cleaning operation of the system is realized, and an automatic cleaning function is realized.

Description

technical field [0001] The invention relates to the technical field of filter cleaning, in particular to a self-cleaning high-temperature filter system cleaning method and a high-temperature filter system. Background technique [0002] In the soda sampling rack, the sample from the boiler is in a state of high temperature and high pressure, the temperature can reach 640 degrees Celsius, and the pressure can reach 32 MPa. The sample is usually in a mixed state of water and vapor, and is mixed with various impurities such as fine sand particles, exfoliated metal oxide layers, etc. Therefore, it is generally necessary to install a filter device at the entrance of the high-temperature part of the sampling rack to filter out various impurities to prevent the impact on the subsequent threaded pressure reducing valve, blockage, component failure, or excessive maintenance. Under normal circumstances, the filter needs to be replaced regularly, and a large amount of impurities will a...

AI Technical Summary

Problems solved by technology

Under the condition of high temperature and high pressure, this kind of temporary internal leakage is very dangerous, and the water vapor mixture will rush out from the internal leakage quickly. If this state is maintained for a long time, such as more than one week, the gap between the valve needle and the valve core will be easily broken. A permanent groove appears, causing the temporary internal leakage to become a permanent internal leakage, so that the valve cannot be effectively closed, and the permanent internal leakage will cause damage to the valve

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