Cyclone separator and preheating gasification system

Abstract

The invention provides a cyclone separator, comprising an inlet passage, a cyclone cylinder, a cone section and an outlet, wherein the inlet passage comprises a tangential side wall tangential to thecyclone cylinder; the inlet passage is communicated with the upper part of the cyclone cylinder, the inlet passage is provided an inlet for a to-be-separated matter to enter, and the to-be-separated matter enters from the inlet and then enters the cylinder along the tangential direction of the cyclone cylinder; the lower part of the cyclone cylinder is connected with the open end of the cone section, and the closed end of the cone section serves as a lower outlet; a separated solid is configured to pass through the cyclone cylinder to fall into the cone section; the outlet is communicated withthe top of the cyclone cylinder, and separated gas passes through the cyclone cylinder to enter the outlet, and leaves the cyclone separator; the surface of the tangential side wall and / or the cyclone cylinder are / is provided with at least one turbulence air inlet. By adoption of the cyclone separator provided by the invention, continuous and quantitative adjustment of heat, mass and fuel particle size distribution between a preheating unit and a gasification unit in a preheating gasification process can be realized.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a cyclone separator and a preheating gasification system comprising the cyclone separator. Background technique [0002] Coal gasification technology is an important part of my country's clean coal technology, one of the main ways to use coal efficiently and cleanly, and has become the core technology of many modern energy and chemical systems. The entrained bed coal gasification process has high reaction temperature, liquid slag discharge, high gasification intensity, large production capacity, and high carbon conversion rate. It has become the main development direction of coal gasification technology. However, the existing entrained-bed gasification process has problems such as small particle size of coal pulverized into the furnace, high preparation cost, and large restrictions on coal types. The preheating gasification process realizes the cascade control of the c...

AI Technical Summary

Problems solved by technology

In the prior art, for the specified input conditions (such as coal type, coal particle size, gasification load), the best match of heat, mass and fuel particle size between the preheating unit and the gasification unit can be obtained by design during system design However, when the system operation deviates from the design load or the coal type and particle size are changed in actual operation, the optimal matching relationship between the preheating unit and the gasification unit will be destroyed, which will make the gasification performance indicators (such as effective gas ratio, carbon conversion rate, cold gas efficiency, etc.) cannot meet the production requirements, and in severe cases, the system cannot run stably

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