Heat accumulating type fluidized bed powdered coal dry distillation device

Abstract

The invention provides a heat accumulating type fluidized bed powdered coal dry distillation device which comprises a lower bed body, a middle conical section and an upper expanding section, wherein the middle conical section is shaped like a funnel, the upper part of the middle conical section is connected with the upper expanding section, and the lower part of the middle conical section is connected with the lower bed body; a cyclone separator is arranged in the upper expanding section, a gas collection chamber is arranged at the top end of the cyclone separator, and the gas collection chamber is communicated with an oil gas outlet at the top end of the upper expanding section; heat accumulating type radiation tubes are arranged in the lower bed body; the side surface of the upper part of the lower bed body is provided with a powdered coal inlet, the side surface of the lower part is provided with a semicoke outlet, and the bottom is provided with a gas distributor connected with a gas chamber; and the bottom of the gas chamber is provided with a superheated steam inlet. According to the heat accumulating type fluidized bed powdered coal dry distillation device, the consumption of superheated steam is low, and the dust entrainment amount in oil gas is low, thereby effectively avoiding the influence of dust on the quality of coke tar.

Description

technical field [0001] The invention relates to a pulverized coal processing device, in particular to a thermal storage type fluidized bed pulverized coal dry distillation device. Background technique [0002] In the 21st century, with the rapid economic growth, the demand for chemical raw materials has also increased sharply. In the structure of chemical raw materials, coal accounts for more than half. consensus. In order to realize the graded and efficient utilization of coal resources, the academic community has proposed the process idea of ​​"coal topping", which fully extracts gas, liquid fuel and fine chemicals from coal through coal dry distillation technology. Most of the existing coal dry distillation technologies are suitable for high-quality lump coal. For example, the airflow internal heating type dry distillation furnace requires the raw coal lump size to be between 20 and 80mm. The tar yield is low, and the quality of semi-coke is uneven; while the heat requi...

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that the raw material is lump coal or briquette, and pulverized coal cannot be directly used; in addition, the indirect heating method is adopted, the thermal efficiency is low, the heat transfer rate in the dry distillation process is slow, the heating is uneven, and the dry distillation time is too long. Long, low throughput per furnace

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