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Multistage pulverized coal multiple-tube rotary low temperature dry distillation technology and system

A dry distillation and pulverized coal technology, applied in the field of multi-stage pulverized coal multi-tube rotary low-temperature dry distillation process and system, can solve the problems of large hot semi-coke circulation, complex process system, and difficult operation, and achieve small gas processing capacity, Enhance the effect of dry distillation and improve the effect of heat utilization

Active Publication Date: 2013-06-05
SHANDONG TIANLI DRYING TECH & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Multistage pulverized coal multiple-tube rotary low temperature dry distillation technology and system
  • Multistage pulverized coal multiple-tube rotary low temperature dry distillation technology and system
  • Multistage pulverized coal multiple-tube rotary low temperature dry distillation technology and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, two-stage multi-tube rotary low-temperature dry distillation process and system, such as figure 1 , 3 shown.

[0042] Coal process: send the pulverized coal to be retorted into the raw coal bunker 1, send it to the first-stage multi-tube pulverized coal feeder 10A through the conveying equipment 3 below the rotary feeding valve 2, and evenly enter the first-stage multi-tube rotary retort machine In the multiple dry distillation tubes 12 inside the dry distillation tube 12, the helical blades 13 in the dry distillation tube 12 move axially under the action of their own gravity and conduct indirect heat exchange with the flue gas from the first-stage air mixing chamber 5A. The flow direction of pulverized coal can be forward or reverse. Slight pyrolysis occurs after the pulverized coal absorbs heat, and the discharge temperature is controlled at 200-400°C; the pulverized coal after heating and pyrolysis by the first-stage multi-tube rotary retort 4A is sen...

Embodiment 2

[0045] Embodiment 2: Three-stage multi-tube rotary low-temperature dry distillation process and system, such as figure 2 , 3 shown.

[0046] Coal process: the pulverized coal to be retorted is sent to the raw coal bunker 1, sent to the multi-tube pulverized coal feeder 10A through the conveying equipment 3 below the rotary feeding valve 2, and evenly enters the multiple tubes inside the first-stage multi-tube rotary retort 4A. In the first retort tube 12, the helical blade 13 in the retort tube 12 moves axially under the action of its own gravity and conducts indirect heat exchange with the flue gas from the first-stage air mixing chamber 5A. The flow direction of the flue gas and pulverized coal Can be forward or countercurrent. Slight pyrolysis occurs after the pulverized coal absorbs heat, and the discharge temperature is controlled at 200-300°C. After being heated and pyrolyzed by the first-stage multi-tube rotary retort 4A, the pulverized coal is sent to the second-sta...

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Abstract

The invention discloses a multistage pulverized coal multiple-tube rotary low temperature dry distillation technology and system. The multiple-tube rotary dry distillation machine multistage (two stages or more) series connection process is adopted to perform low temperature dry distillation on pulverized coal; a plurality of dry distillation tubes are arranged in the multiple-tube rotary dry distillation machine to disperse coal powder, a helical blade is arranged in each dry distillation tube to guide and disturb coal and reinforce the dry distillation effect and increase the dry distillation effective area, the technology has the advantages of large pulverized coal treatment capacity, large dry distillation gas treatment capacity, low tar and dust contents, high coal gas caloric value and the like; the chemical raw materials generated in the low temperature dry distillation process of bituminous coal and low-price pulverized coal can be recycled extremely, the comprehensive utilization rate of coal is increased; and semicoke powder and coal gas with high calorific value can be produced through the low temperature dry distillation of bituminous coal and low-price pulverized coal.

Description

technical field [0001] The invention relates to a pulverized coal low-temperature dry distillation process and system, in particular to a multi-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 vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B47/20C10B31/00C10B57/02C10B57/00
Inventor 王宏耀吴静曹世峰罗光亮范红梅吴广义
Owner SHANDONG TIANLI DRYING TECH & EQUIP
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