Device and method for discharging solid particles in tar-containing gas

Abstract

The invention discloses a discharging device and method for solid particles in tar-containing coal gas. The discharging device comprises a multi-pipe cyclone separator, a variable-pressure filter and a cooling bin. Fire-resisting and heat-insulating materials are arranged on the inner walls of shells of the multi-pipe cyclone separator and the variable-pressure filter. A filter element is arranged in a cavity of the variable-pressure filter, and the top of the filter element is communicated with a tar recovery system through a pipeline and a discharging valve. A cooling coil is arranged in the cooling bin. Through startup preheating of preheated gas and heat insulation of the fire-resisting and heat-insulating materials, the situation that tar blocks pipelines or equipment after being condensed is effectively prevented. Meanwhile, by adopting the multi-pipe cyclone separator and the filter element for two-stage separation, the gas-solid separation efficiency is substantially improved, and the solid particles in the tar-containing coal gas can be effectively discharged.

Description

Technical field [0001] The invention relates to a device and method for separating and discharging a mixture of coal gas, gaseous coal tar and solid particles produced after low-temperature pyrolysis of low-rank coal in a fluidized bed, in particular to a device and method for discharging solid particles in tar-containing gas . Background technique [0002] As we all know, the basic characteristics of my country's energy are oil-poor, gas-rich and coal-rich, and the current use of abundant coal resources is obviously too extensive. From an environmental point of view, the coal chemical industry has an inescapable responsibility for the destruction of natural resources and the frequent occurrence of smog in recent years. From a market perspective, traditional industries such as coal-to-methanol and coal-to-ammonia are facing severe overcapacity, and structural problems in the coal chemical industry are gradually emerging. In view of the dual pressure of the environment and the m...

AI Technical Summary

Problems solved by technology

If the solid particles are not separated in time, the solid impurity content of the coal tar produced by the subsequent washing process will increase significantly, which will seriously affect the quality of the product coal tar

At the same time, with the flow of pyrolysis products to the subsequent process system, a certain degree of heat loss will occur on the walls of pipelines and equipment, and the temperature will gradually drop, which will cause tar to condense and agglomerate with solid particles, causing pipeline or equipment blockage

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