Dust filtration system of mixed gas of high-temperature oil gas, water vapour and carbonaceous easy-precipitation substances

Abstract

The invention discloses a dust filtration system of a mixed gas of high-temperature oil gas, water vapour and carbonaceous easy-precipitation substances. The system comprises a sealed separation chamber communicating a gas inlet pipe and a gas discharge pipe. A filtration mechanism is arranged in the sealed separation chamber. The outer surface of the filtration mechanism communicates with the gas inlet pipe, and the inner surface of the filtration mechanism communicates with the gas discharge pipe. A filtration body regeneration mechanism is arranged in the dust filtration system. According to the invention, the filtration body regeneration mechanism is arranged in the sealed separation chamber communicating the gas inlet pipe and the gas discharge pipe. When the filtration body works for a period of time, the filtration capacity of the filtration body cannot satisfy the requirement of normal working because the filtration capacity is greatly reduced due to tar and coal ash deposits on the surface and pores of the filtration body. The filtration body regeneration mechanism works, and the filtration body is recovered to a desired level. Regeneration is repeated, such that filtration body investment is directly reduced, and filtration body service life is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of gas dust removal in the coal chemical process, and in particular relates to a dust filter system for a mixed gas of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances. Background technique [0002] In the chemical, petroleum, metallurgical and other industries, high-temperature dust-containing gases are often produced, especially in the process of pyrolyzing low-rank coal to generate coal tar gas and decomposing gas to improve coal quality. The content of pulverized coal is very high, and the carbon-containing easily precipitated substances in the mixed gas, such as tar coke and asphalt-like substances, can only exist in a gaseous state in a high-temperature environment. slowly precipitated. Carbon-containing easy-to-separate substances such as tar coke and asphalt-like substances are enriched in the pores of the filter body and filter cake. An appropriate amo...

AI Technical Summary

Problems solved by technology

Carbon-containing easy-to-separate substances such as tar coke and asphalt-like substances are enriched in the pores of the filter body and filter cake. An appropriate amount of filter cake can make the filtering effect of the filtered gas better, but once there are too many carbon-containing easily-separated substances, On the one hand, it will block the pores of the filter body, on the other hand, it will gradually thicken the filter cake, and then lose the filtering function, so that the production cannot continue

Even in the state of continuous high temperature of the filter cavity, during the filtration process of the gas mixture with too high dust content, due to the relationship between molecular liquefaction, solidification and contact with the environment and temperature changes, in the part with frequent physical contact with the filter body , carbon-containing easy-to-precipitate substances such as tar coke and asphalt-like substances will still gradually precipitate from the mixed gas, enriched in the pores of the filter body, and gradually thicken the filter cake, losing the filtering function, while the filter body Replacement will inevitably bring about shutdown problems. For large-scale chemical equipment with continuous operation, shutdown maintenance will inevitably bring huge economic losses

For a long time, no matter at home or abroad, the problem of filtration and dust removal of high-temperature oil gas, water vapor, and carbon-containing easy-to-precipitate mixture, especially the problem of dust removal of mixed oil gas with high dust content has not been effectively solved, and industrial production cannot be formed. , which directly affects the current overall coal industry structure in the world, and the huge amount of low-rank coal cannot be used quickly and efficiently

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