Pulverized coal pyrolysis device

Abstract

The invention provides a pulverized coal pyrolysis device which comprises a rotary radiation bed, a hot-blast stove and a smoke ejector, wherein the rotary radiation bed is provided with a pulverized coal feed port, a thermal medium inlet, a thermal medium outlet, a semi-coke outlet and a crude gas exhaust port; the hot-blast stove is provided with a semi-coke inlet and a hot air exhaust port; the semi-coke inlet is communicated with the semi-coke outlet in the rotary radiation bed; the smoke ejector is provided with a hot air inlet, an ejection gas inlet and an ejector exit; the hot air inlet is communicated with the hot air exhaust port in the hot-blast stove; the ejector exit is communicated with the thermal medium inlet; and the ejection gas inlet is communicated with the thermal medium outlet in the rotary radiation bed. In the device, the semi-coke is burnt in the hot-blast stove, and the generated high-temperature smoke returns to the rotary radiation bed to supply pyrolysis heat; and thus, the utilization of the semi-coke heat is facilitated to solve the problem of difficulty in semi-coke treatment. Meanwhile, the high-temperature smoke is ejected into the rotary radiation bed by the smoke ejector, the gas pressure can be increased, and the problem of dust blocking of thermal medium channel or low heat exchange efficiency is avoided.

Description

technical field [0001] The invention relates to the technical field of pulverized coal pyrolysis, in particular to a pulverized coal pyrolysis device. Background technique [0002] Pulverized coal (also known as fine coal, or low-rank coal) is a necessary by-product in the coal mining process, especially the use of modern comprehensive coal mining equipment has increased the output of fine coal. However, our country is highly dependent on coal resources. At present, we are gradually paying attention to the development and clean utilization of pulverized coal resources. This is an important measure to maintain the sustainable development of our country's economy and ensure the safe development of energy. [0003] Among the currently disclosed technologies, such as coal-to-oil, coal-to-natural gas, coal-to-methanol technologies, or low-, medium-, and high-temperature coke-to-gas technologies, the raw coal particles used are basically above 25mm. Pulverized coal with a particl...

AI Technical Summary

Problems solved by technology

[0010] The main purpose of the present invention is to provide a pulverized coal pyrolysis device to solve the problems of high heat exchange efficiency, equipment simplification and high economy in the existing pulverized coal pyrolysis technology

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