Process for dry coke quenching and coke desulfurating by coke oven gas

A technology of dry quenching and coke, applied in the cooling of coke, coke oven, petroleum industry, etc., can solve the problem of no coke desulfurization, unable to obtain lump coke, etc.

Inactive Publication Date: 2006-03-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies and patented technologies are not aimed at coke desulfurization, nor can they solve the problem of coke desulfurization, because the aforementioned coal hydropyrolysis process generally uses a fluidized bed with hydrogen-rich gas as a carrier gas to heat and pyrolyze pulverized coal , the hydropyrolysis temperature generally does not exceed 700°C, the product obtained is low-sulfur granular semi-coke, and block coke cannot be obtained, while coking is that coal is heated to about 1000°C in a fixed bed in isolation from air, and the product is block coke
So far, there are no research reports and patented technologies on coke desulfurization in the world

Method used

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  • Process for dry coke quenching and coke desulfurating by coke oven gas
  • Process for dry coke quenching and coke desulfurating by coke oven gas
  • Process for dry coke quenching and coke desulfurating by coke oven gas

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] Load 5kg of coke from a factory in a small vertical straight tube quenching chamber reactor, the sulfur content of the coke is 0.71%, heat the reactor, stop heating when the temperature reaches the actual coke oven discharge temperature of 1000°C, and The simulated coke oven gas at normal temperature (about 25°C) is supplied from the bottom of the reactor to cool the red hot coke, wherein the components of the coke oven gas (all gas components in the examples are by volume percentage) are about 55% H2-25% CH4-15% CO-5% N2, the gas supply rate is 50L / min, until the furnace temperature drops to 200°C, the gas supply is stopped. The cooling process of the test took 160 minutes, and the average sulfur content of the coke analyzed after the test was 0.45%. However, under the same conditions, nitrogen gas was introduced for test comparison, and the cooling process took about 190 minutes, and the average sulfur content of the coke was 0.70%. After the coal gas was introduced,...

example 2

[0031] The simulated coke oven gas 55%H blown into in Example 1 2 -25%CH 4 -15%CO-5%N 2 Change to natural gas and repeat the test of Example 1. The main components of natural gas are: 93.38% CH 4 -2.68%N 2 -1.86%CO 2 -1.67%C 2 h 6 . The cooling time of the test was 110 minutes, and the average sulfur content of the coke analyzed after the test was 0.50%. Compared with the blank test with nitrogen gas under the same conditions, the sulfur content of coke was reduced by 30% and the cooling time was reduced by 42% after gas was fed.

example 3

[0033] The simulated coke oven gas 55%H blown into in Example 1 2 -25%CH 4 -15%CO-5%N 2 Change to H 2 , repeating the test of Example 1, the average sulfur content of the coke analyzed after the test was 0.41%, and the cooling time was 205min. Compared with the corresponding blank test, the sulfur content of the coke was reduced by 42% and the cooling time was increased by 8% after the gas was introduced.

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Abstract

A process for using coke oven gas to extinguish coke and desulfurize coke features that the coke oven gas is circulated in the coke extingushing furnace, the heat-absorbing cracking reaction of methane in gas and the high heat transfer efficiency of gas can effectively extinguish to coke, and the H2 in gas can react on the sulfide and organosulfur in coke to generate H2S, so desulfurizing coke.

Description

technical field [0001] The invention relates to a low-sulfur coke production technology and a coke dry quenching technology. The invention belongs to the field of coal chemical industry and metallurgy. Background technique [0002] The largest user of coke is the ironmaking industry. The sulfur content in coke significantly affects the energy consumption of blast furnace ironmaking and the quality of molten iron. For every 0.1% increase in sulfur in coke, the coke ratio needs to increase by 1.5%, while the production capacity of the blast furnace decreases by 2.5%. Most of the sulfur in the coke eventually enters the molten iron, and the molten iron with high sulfur content increases the cost and time of the pretreatment of the molten iron. [0003] China is the world's largest producer of coke. Over the past ten years, my country's total coke production has more than doubled. In recent years, the world's coke production is about 360 million tons per year, one-third of w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B39/00
Inventor 郭占成黄孝文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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