A dust removal device and dust removal method for pulverized coal pyrolysis/carbonization oil gas

Abstract

The present invention provides a dust removal device and method for pulverized coal pyrolysis / carbonization oil and gas, which include sequentially connected: a dust removal pretreatment unit, including at least two stages of cyclone separators in series; an oil and gas filter, which is a closed tank, The interior is arranged in order from top to bottom. The nozzle is set on the top of the tank and communicates with the outside world; the Venturi tube is arranged vertically below the nozzle; the clean oil and gas chamber is installed vertically with the venturi tube, and the inside is equipped with a clean oil and gas chamber The hollow filter element group with the upper tube plate and the lower tube plate sealed and connected; the air collection chamber is coaxially connected with the filter element; the ash hopper is equipped with an ash unloading valve at the lower end; the sandblasting tank is a closed tank with sand material on the top The inlet is connected to the inlet of the sand pipeline through the sand material preheater, and the gas inlet is respectively provided on the top and the lower side to communicate with the inlet of the backflush gas pipeline through the backflush gas preheater, and the sand material outlet at the bottom is connected to the oil gas filter connected. Solve the problems of poor oil and gas dust removal effect, low efficiency and unstable operation of existing devices.

Description

technical field [0001] The invention belongs to the technical field of high-temperature dry dedusting of dusty oil and gas in coal chemical industry, and in particular relates to a dedusting device and a dedusting method for high-temperature oil and gas produced in the process of producing coal tar by pyrolysis / carbonization of pulverized coal. Background technique [0002] In recent years, with the improvement of coal mining mechanization, the proportion of pulverized coal is increasing, and the market price of pulverized coal is only one-third of the price of lump coal. If pulverized coal is used as raw material to produce chemical products, the advantages are obvious, but pulverized coal is hot There is still no effective separation means for the separation technology of oil gas and coke powder in the process of hydrolysis or dry distillation, which seriously restricts the development of this industry. [0003] At present, the separation methods of coke powder and oil and...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the problems such as poor separation effect of coke powder and oil gas, low efficiency and unstable operation in the process of filtering and separating pulverized coal pyrolysis / carbonization oil gas in the dusty oil gas dedusting device in the prior art, and then Provide a pulverized coal pyrolysis / carbonization oil and gas dedusting device with ideal separation effect, stable and safe operation and high efficiency

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