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A crude gas upgrading process

A crude gas upgrading technology, which is applied in the field of crude gas upgrading equipment, crude gas upgrading process, and DRI preparation equipment, can solve the problems of huge investment, high loss, long and complicated process, etc., and achieve short process, Small investment, good recovery effect

Active Publication Date: 2020-10-09
NORTHEASTERN UNIV LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing coal gasification heat gas can only be used in the shaft furnace to produce direct reduced iron after cooling-transformation-purification-reheating, the process is long and complicated, the investment is huge, and the loss is high

Method used

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  • A crude gas upgrading process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, the reforming furnace 1 has a certain height, and the inner space of the reforming furnace 1 is the reforming working space. The top of the reforming furnace 1 includes a charging inlet 11, through which the charging of the reforming furnace is filled into the reforming workspace, including 35%wt of coke, 35%wt blue carbon, 20%wt of dolomite and 10%wt of Converter slag. The particle size of the reforming furnace charge is 50mm, and there are a lot of gaps between the particles, which can pass through the gas.

[0034] When starting the furnace, hot air above 700°C is introduced first, and the coke in the reforming furnace 1 starts to burn at this temperature. The air induction duct can lead to the combustion port 15 at the lower part of the reforming furnace 1 . Then the combustion-supporting oxygen is introduced to make the combustion more intense, and the temperature rises to about 1200°C. A large amount of CO is produced during combustion ...

Embodiment 2

[0044] There are two reforming furnaces 1, the top gas of the two reforming furnaces 1 returns to one place, and then performs dust removal and water washing in the second cyclone dust collector 7b, and reaches a three-way valve after being pressurized by the booster pump 8; After dust removal, water washing and pressurization, they can be collected at the three-way valve. The three-way valve can selectively lead the furnace top gas back to the combustion port 15 of one of the two reforming furnaces 1 .

[0045] One of the two reforming furnaces 1 is first heated to 1250° C. for reforming, and top gas is discharged during the reforming process. The exhausted furnace top gas is led through the three-way valve into another reforming furnace 1, that is, the combustion port 15 of the preceding heating furnace, and is burned with the help of combustion-supporting oxygen to increase the furnace temperature of the preceding heating furnace.

[0046] The reforming furnace charges in ...

Embodiment 3

[0050] As in Example 2, the purified synthesis gas is led to the shaft furnace where iron ore or oxidized pellets are placed, and after reflection, direct reduced iron and shaft furnace top gas are obtained.

[0051] The top gas of the shaft furnace is heat-exchanged and dust-removed, then mixed with the upgraded gas as temperature-adjusted gas, and purified synthesis gas is obtained after dust removal. Shaft furnace gas is recycled to reduce waste. The cost is reduced, the structure of the device is compact, and the process for preparing direct reduced iron is short.

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Abstract

The invention relates to a process for upgrading crude coal gas, which includes: a reforming furnace charge is provided in a reforming working space; purified crude gas is passed into the reforming work space for reforming, and the reforming is carried out by means of the reforming furnace charge Remove CO 2 and H 2 S, modified coal gas is obtained after modification; temperature-adjusted coal gas is mixed into the modified coal gas to obtain synthetic modified coal gas, and the synthetic modified coal gas is dusted to obtain purified synthesis gas. The crude coal gas modification process provided by the present invention combines the characteristics of China's energy resources and carries out modification on the basis of coal gas production. Remove and purify CO from crude coal gas 2 and H 2 S, control H in modified gas 2 / CO ratio is conducive to controlling the overall reducibility of purified syngas and has better use effects. Use tempered gas to adjust the temperature for subsequent use. The whole process is short, the temperature is stable and the energy consumption is small. Etc.

Description

technical field [0001] The invention relates to the technical field of coal-to-gas production and treatment, in particular to a crude gas upgrading process. The invention also provides a crude gas reforming device. The invention also provides a device for preparing DRI (direct reduced iron) and a process for preparing DRI. Background technique [0002] With the rapid development of the world's iron and steel industry and the increasing attention of the international community to environmental protection, the dwindling resources of iron ore, coke, and high-quality steel scrap, and the sharp rise in the price of natural gas, direct reduction technology has developed rapidly all over the world. China's natural gas resources are relatively scarce, and the proven natural gas reserves are mainly concentrated in the west and southwest where the industry is relatively backward, and natural gas in cities must be given priority to residents' daily use. However, my country's coal res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/06C10K1/02C10K1/32
CPCC10K1/02C10K1/026C10K1/101C10K1/32Y02P10/122Y02P10/25Y02P20/129
Inventor 储满生李胜康李峰周渝生王国栋唐珏柳政根王佳鑫王正平刘云太
Owner NORTHEASTERN UNIV LIAONING
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