Ascending pipe pneumatic blowing and sweeping device and method

Abstract

The invention discloses an ascending pipe pneumatic blowing and sweeping device and method, and belongs to the field of ascending pipe sweeping. According to the ascending pipe pneumatic blowing and sweeping device and method, pulverized coal particles are adopted as a spraying sweeping medium, a suction-type rotating sand blasting method is utilized for conducting rotating sand-blasting sweeping on the inner wall of an ascending pipe, and meanwhile, an axial reciprocating movement method is utilized for conducting comprehensive sand-blasting sweeping on the inner wall of the ascending pipe; in the sand-blasting sweeping process, rotating power is utilized for synchronously driving fans to rotate to inhibit overflow of flue gas and dust in the ascending pipe. For the suction-type rotating sand blasting method, reverse acting force generated by sand blasting and flow jetting is utilized for driving rotation, and meanwhile, negative-pressure suction force generated by high-pressure gas flow jetting is utilized for providing suction power of the pulverized coal particles; when the adhesion force of sediments on the inner wall of the ascending pipe is weak, pure gasflow can be selectively jetted. According to the ascending pipe pneumatic blowing and sweeping device and method, non-contact sand-blasting sweeping is adopted, the sweeping effect is good, the reliability is high, and the atmospheric pollution is effectively reduced; meanwhile, the ascending pipe pneumatic blowing and sweeping device is simple and compact in structure, and the operation is flexible and convenient.

Description

technical field [0001] The invention relates to a device and a method for cleaning the inner wall of a riser, more specifically, to a device and method for pneumatically purging the riser. Background technique [0002] In the coking process, coal is dry-distilled in the carbonization chamber, and the raw coal gas produced is collected into the top space of the carbonization chamber, enters the riser, and enters the gas collection pipe through the bridge pipe. The temperature of the inner wall of the riser is lower than that of the flue gas, and the surface is easy to coke and deposit graphite. The riser pipe is located on the upper part of the coke oven, and is a section of vertical pipe leading out the raw coal gas collected into the top space of the carbonization chamber. Raw coal gas and some flue gas impurities are introduced into the gas collecting pipe through the riser pipe and then through the bridge pipe for utilization. At present, the initial design of domestic c...

AI Technical Summary

Problems solved by technology

The advantage of this cleaning method is to reduce the flue gas overflow, but it cannot fully clean the surface of the inner wall of the riser pipe, the cleaning is not thorough, and there are always dead corners that cannot be cleaned cleanly, and the force of the airflow is relatively small, so it is impossible to clean the coking with strong adhesion and sediment

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