Crude coal gas modification device and technology and device and technology for preparing DRI (Direct Reduced Iron)

A crude gas and upgrading technology, which is applied to the crude gas upgrading process, the device for preparing DRI, and the equipment field of crude gas upgrading, can solve the problems of high loss, huge investment, long and complicated procedures, etc. Short process and good reductive effect

Active Publication Date: 2018-09-04
NORTHEASTERN UNIV +1
View PDF2 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Crude coal gas modification device and technology and device and technology for preparing DRI (Direct Reduced Iron)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as 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 combusti...

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a crude coal gas modification technology. The crude coal gas modification technology comprises the following steps: arranging furnace charges of a modification furnace in a modification working space; introducing purified crude coal gas into the modification working space and modification, wherein the step of modification is used for removing CO2 and H2S of the furnace charges of the modification furnace; after modification, obtaining reformed coal gas; blending the modified coal gas into temperature-regulation coal gas to obtain synthesized modified coal gas; carryingout dust removal on the synthesized modified coal gas to obtain purified synthesized gas. The crude coal gas modification technology provided by the invention is combined with energy source characteristics of China and modification is carried out on the basis of the coal gas. The CO2 and the H2S in the crude coal gas are removed and purified, and the H2 / CO specific value in the modified coal gasis controlled; the whole reduction property of the purified synthesized gas is easy to control and a utilization effect is better. The temperature-regulation coal gas is used for regulating the temperature and the coal gas is suitable for subsequent utilization. The crude coal gas modification technology has the advantages of simple whole flow, stable temperature, small energy consumption and thelike.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/32C10K1/02C10K1/10
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap