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Multi-nozzle coal water mixture or fine coal gasifying furnace and its industrial application

A coal-water slurry and multi-nozzle technology, applied in the field of gasifier, can solve the problems of easy solidification, shortened operation period, easy blockage of pipelines and downstream equipment, etc., and achieves the effect of saving investment and uniform temperature distribution in the furnace

Active Publication Date: 2006-05-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has two disadvantages. First, the liquid slag is easily solidified and blocked the slag outlet due to the presence of non-heated gas; second, the fine coal slag suspended in the gas flow has to go through a long pipeline and change the flow direction before it can enter. The downstream equipment performs waste heat recovery or gas-solid separation, and the pipeline and downstream equipment are easy to block, both of which will shorten the operation cycle
Practice has proved that the gasifier still has room for improvement. The current gasifier cannot meet the needs of modern production enterprises for coal gasification technology with a daily processing capacity of more than 3,000 tons of coal. Processing power can be further improved

Method used

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  • Multi-nozzle coal water mixture or fine coal gasifying furnace and its industrial application
  • Multi-nozzle coal water mixture or fine coal gasifying furnace and its industrial application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A multi-nozzle coal-water slurry gasifier with a daily processing capacity of 3,000 tons of coal, the gasification pressure is 6.5MPa, the inner diameter of the gasification chamber shell is Φ4400mm, and there are three slag lowering ports 14. The coal-water slurry process nozzle adopts the patent 95111750.5 For the proposed structure, the angle α between the axis and the horizontal plane is 10°;

[0024] The gasifying agent is oxygen, and the total consumption of oxygen is 82192Nm 3 / h, the gasification temperature is 1350°C, the weight ratio of coal water slurry to gasification agent is 1.77, and the total gas flow rate out of the gasification chamber is 301476Nm 3 / h.

[0025] Calorific value (kJ / kg)

[0026] h 2

Embodiment 2

[0028] A multi-nozzle pulverized coal gasifier with a daily processing capacity of 3,000 tons of coal, the gasification pressure is 4.0MPa, the inner diameter of the gasification chamber shell is Φ4200mm, and there are three slag lowering ports 14, and the nozzle adopts figure 2 structure, the angle α between the axis and the horizontal plane is 10°;

[0029] The gasification agent is oxygen and water vapor, and the total consumption of oxygen is 70000Nm 3 / h, the total steam consumption is 22500kg / h, the gasification temperature is 1350°C, the weight ratio of pulverized coal to oxygen is 1.25, and the total gas flow out of the gasification chamber is 264175Nm 3 / h.

[0030] Water (wt%)

[0031] h 2 (v)%

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PUM

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Abstract

The invention discloses a plural muzzles coal water slurry or fine coal gasification furnace used for gasifying coal water slurry or fine coal. The gasification room is made up of case, process muzzle room, process muzzle, preheating muzzle room, and preheating muzzle. The case has firebricks in it and washing cooling room is made up of chilling circle, down take, vesicle breaking stick and roughing slag outlet. The transforming ratio of the furnace is over 98%, and is especially suited for large scale gasification produce technology that produces 3000-5000T / day.

Description

technical field [0001] The invention relates to a gasification furnace used for gasifying coal-water slurry or pulverized coal, and relates to a multi-nozzle gasification furnace. Background technique [0002] The clean and efficient utilization of coal is a major technical issue in the field of energy and environmental protection in the world today, and it is also one of the key technologies for the sustainable development of my country's national economy. Coal gasification is the main way to convert primary energy into clean secondary energy, and its products are fuel gas (coal gas), synthesis gas, reducing gas, hydrogen, and carbon monoxide. Coal gasification technology has been widely used in the fields of combined cycle (IGCC) power generation unit, synthetic ammonia and methanol industry, production of acetic acid and acetic anhydride by carbonylation, production of sponge iron, preparation of pure carbon monoxide, and preparation of pure hydrogen. application, and th...

Claims

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Application Information

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IPC IPC(8): C10J3/56
CPCY02E20/16Y02E20/18
Inventor 于遵宏代正华龚欣于广锁王辅臣刘海峰王亦飞陈雪莉周志杰梁钦锋李伟锋郭晓镭王兴军
Owner EAST CHINA UNIV OF SCI & TECH
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