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Low-rank pulverized coal gas generating process used for blast furnace injection

A low-rank coal and coal-to-gas technology, which is applied in blast furnaces, blast furnace details, granular/powdered fuel gasification, etc., can solve the problems of low coal powder injection volume and low coal powder utilization rate, so as to improve efficiency, Prevent smoke charcoal and solve the effect of poor atomization

Inactive Publication Date: 2016-12-21
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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Problems solved by technology

[0003] Purpose of the invention: The purpose of the present invention is to provide a low-order pulverized coal gas-making process for blast furnace injection in view of the shortcomings of low pulverized coal injection and low utilization rate of pulverized coal in the prior art

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  • Low-rank pulverized coal gas generating process used for blast furnace injection

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Embodiment

[0022] Example: such as figure 1 As shown, a low-rank pulverized coal gas production process for blast furnace injection, the specific process is as follows:

[0023] The gasification agent produced by the reaction in the mixer 1 filled with oxygen and steam enters the gasifier 2, the temperature in the mixer 1 is 500°C, and the steam pressure is 2.45MPa. The pulverized coal is sent into the coal gasifier 2 through the coal bunker and the pulverized coal conveying equipment. The pulverized coal conveying equipment can be uniformly fed by a screw feeder. High-temperature coal-to-gas, the gasifier 2 is a reducing atmosphere of CO, the reaction temperature is 1000°C, and the maximum pressure is 0.5MPa. The generated high-temperature coal-based gas enters the cyclone separation device 3 to purify the floating dust. The temperature of the high-temperature coal-based gas processed by the cyclone separation device 3 is 900°C. The high-temperature coal-based gas enters the waste heat...

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Abstract

The invention discloses a low-order pulverized coal gas-making process for blast furnace injection. Oxygen and water vapor are mixed at high temperature to form a gasification agent, and the gasification agent is passed into pulverized coal to react to form high-temperature coal-made gas. The dust in the high-temperature coal-to-gas is purified and cooled, and then desulfurized. The gas is compressed and stored in the gas storage tank. The gas in the gas storage tank is led to each blast furnace tuyere through the pipeline for injection. The low-order pulverized coal gas production process used in blast furnace injection in the present invention first generates coal gas through the reaction of clean coal powder, and then utilizes it for blast furnace injection. The process of producing coal gas burns clean, effectively alleviating energy pollution, and the preparation process Simple and efficient, strong operability, high purity of the gas produced and low pollution; the injection of clean gas not only improves the efficiency of the blast furnace, but also solves the problem of energy imbalance, reduces the cost of blast furnace ironmaking, and solves the problem of blast furnace injection Coal powder is easy to coke and the combustion efficiency is low, which solves the problem of high cost of natural gas, solves the problem of poor atomization caused by heavy oil injection, and prevents the formation of a large amount of soot at high temperatures.

Description

technical field [0001] The invention relates to a gas-making process, in particular to a pulverized coal gas-making process. Background technique [0002] Blast furnace ironmaking is the main method of modern ironmaking, and it is also an important link in steel production. The blast furnace injection technology is to inject gas, liquid or solid fuel into the blast furnace from the tuyere through special equipment to replace part of the coke in the blast furnace charge. It can improve blast furnace operation, increase pig iron output, and reduce pig iron cost. Fuel injection has become the main measure to reduce the coke ratio of contemporary blast furnaces. There are three main categories of fuel injection technology at home and abroad: injection of natural gas, injection For blowing heavy oil and pulverized coal, China lacks natural gas resources, so the cost of injection is too high. Abroad, only the former Soviet Union injected a large amount of natural gas on blast furn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C10J3/46C10K1/02C10K1/12
CPCY02P10/143C21B5/00C10J3/46C10K1/02C10K1/12
Inventor 赵丹丹张晨王坤李欣
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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