Single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and system

Abstract

The invention discloses a single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and a system. The single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology adopts a multi-pipe rotary destructive distillation machine to carry out low-temperature destructive distillation of fine coal. Multiple destructive distillation pipes for dispersing fine coal are arranged in the multi-pipe rotary destructive distillation machine. Spiral blades are arranged in the destructive distillation pipes and have the effects of diversion and disturbance on coal. The single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and the system can enhance destructive distillation effects, can increase destructive distillation effective areas, have the advantages of large fine coal treatment amount, small destructive distillation gas treatment amount, low content of tar and dust, and high calorific value of gas, can realize recovery of chemical raw materials such as coal tar and the like produced in low-temperature destructive distillation of soft coal and low-order fine coal as completely as possible, can improve a comprehensive utilization rate of coal, and can realize production of semicoke powder and high-calorific value gas from soft coal and low-order fine coal through low-temperature destructive distillation.

Description

technical field [0001] The invention relates to a pulverized coal low-temperature dry distillation process and system, in particular to a single-stage pulverized coal multi-tube rotary low-temperature dry distillation process and system. Background technique [0002] Coal dry distillation is a process in which coal is thermally decomposed to generate gas, tar, crude benzene and coke under the condition of isolation of air. According to the different final heating temperature, it can be divided into low temperature dry distillation, medium temperature dry distillation and high temperature dry distillation. [0003] According to the different heating methods, it can be divided into two types: external heating type and internal heating type. The representative external heating type is the Wood furnace lignite drying and upgrading process developed in the United Kingdom. It is characterized in that the retort chamber is not connected to the combustion chamber, and the retort vo...

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Problems solved by technology

The process system is complex and the equipment manufacturing cost is high, the investment is large, the operation is difficult, and the circulation of hot semi-coke is large

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