Pulverized coal pyrolysis dust collection system with built-in cyclone dust collector and built-in circulation type particle bed

Abstract

The invention relates to a pulverized coal pyrolysis dust collection system with a built-in cyclone dust collector and a built-in particle separable circulation type particle bed. The pulverized coal pyrolysis dust collection system comprises a pyrolysis reactor, the cyclone dust collector and the circulation type particle bed, wherein the cyclone dust collector and the circulation type particle bed are arranged inside the pyrolysis reactor; the circulation type particle bed comprises a heating section at the upper part, as well as a dust collection section, a lifting device, a feeding system and a regenerator which are arranged at the lower part; the dust collection section arranged in front of a pyrolysis gas outlet of the pyrolysis reactor comprises a collector, a gas inlet end, a gas outlet end and a lower particle discharge hole. Since recyclable and regenerated particles are taken as a filtering material, and with the combination of other dust collection equipment, the problem in dust collection of pulverized coal pyrolysis gases can be efficiently solved with low cost, and the pyrolysis gas dust content can be equal to or lower than 50mg / Nm<3>, so that the content of dust in tar is low, and later tar treatment requirements can be met.

Description

technical field [0001] The invention belongs to the field of cascaded utilization of coal quality, and specifically relates to a dust removal system in the pulverized coal pyrolysis process, in particular to a pulverized coal pyrolysis dust removal system with a built-in cyclone dust collector and a sortable particle bed. Background technique [0002] The cascade utilization of low-rank coal is an important field of my country's 13th Five-Year Coal Chemical Industry, especially for the large amount of low-rank pulverized coal in my country, how to effectively utilize it has become the focus of research. Adopt pyrolysis technology to extract low-rank coal oil gas, and use the remaining semi-coke to generate electricity or use it as a raw material for gasification. Compared with coal gasification technology, the investment is small and the water consumption is low. It is a technical path for clean and efficient utilization of coal advocated by my country. . However, during the...

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Problems solved by technology

The high-temperature online separation of pyrolysis powder coke and pyrolysis oil and gas is not ideal, which eventually leads to high solid content in coal tar and poor oil quality, which cannot meet the quality indicators for further deep processing of coal tar

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