Method and device for low-pressure processing of coal coking gas

A technology for coking gas and coal, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low pressure and high energy consumption, and achieve the effect of reducing energy consumption and increasing economic benefits

Inactive Publication Date: 2009-09-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pressure of coal coking gas discharged from coking furnaces in actual industry is very low, usually at or near normal pressure. If the above-mentioned cryogenic separation, membrane sepa

Method used

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  • Method and device for low-pressure processing of coal coking gas
  • Method and device for low-pressure processing of coal coking gas
  • Method and device for low-pressure processing of coal coking gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] use figure 1 The technological process shown (wherein hydration reactor 1 adopts figure 2 The structure shown, no filter plate is set), and the simulated coking gas is separated to obtain high-concentration hydrogen and methane respectively. Wherein, the composition of the feed gas (equivalent to coking gas) entering the hydration reactor 1 is: H 2 (50.21mol%)+CH 4(49.79mol%); the operating temperature of the hydration reactor 1 is 3.0°C, and the operating pressure is 0.20MPa; the hydrate working fluid is an emulsion obtained by mixing the oil phase solution and the water phase solution at a volume ratio of 4:1, and the oil phase solution is Commercially available No. 20 diesel oil, the aqueous phase solution is an aqueous solution containing tetrahydrofuran (wherein the molar fraction of THF is 0.06), and the aqueous phase solution contains Span-60 with a molar fraction of 0.0128, and contains 500ppm of dodecyl Sodium benzenesulfonate; the volume ratio of the amoun...

Embodiment 2

[0044] use figure 1 The technological process shown (wherein hydration reactor 1 adopts figure 2 The structure shown, no filter plate is set), and the simulated coking gas is separated to obtain high-concentration hydrogen and methane respectively. Wherein, the composition of the feed gas (equivalent to coking gas) entering the hydration reactor 1 is: H 2 (59.16mol%)+CH 4 (40.84mol%); the operating temperature of hydration reactor 1 is 3.5°C, and the operating pressure is 0.96MPa; the hydrate working fluid is an oil phase solution and a water phase solution in a volume ratio of 4:1, and the oil phase solution is commercially available -No. 20 diesel oil, the aqueous phase solution is an aqueous solution containing tetrahydrofuran (wherein the molar fraction of THF is 0.06), and the aqueous phase solution contains Span-60 with a molar fraction of 0.0128, and contains 500ppm of dodecylbenzenesulfonate Sodium acid; the volume ratio of the amount of hydrate working liquid intr...

Embodiment 3

[0046] use figure 1 The technological process shown (wherein hydration reactor 1 adopts figure 2 The structure shown, no filter plate is set), and the simulated coking gas is separated to obtain high-concentration hydrogen and methane respectively. Wherein, the composition of the feed gas (equivalent to coking gas) entering the hydration reactor 1 is: H 2 (58.07mol%)+CH 4 (39.22mol%)+CO 2 (2.71mol%); the operating temperature of hydration reactor 1 is 3.8°C, and the operating pressure is 0.90MPa; the hydrate working fluid is an emulsion obtained by mixing the oil phase solution and the water phase solution at a volume ratio of 4:1, wherein the oil phase The solution is commercially available No.-20 diesel oil, the aqueous phase solution is an aqueous solution containing tetrahydrofuran THF (wherein the molar fraction of THF is 0.06), and the aqueous phase solution contains Span-60 with a molar fraction of 0.0128, and contains 500ppm of Sodium dialkylbenzene sulfonate; the...

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Abstract

The invention relates to a method for low-pressure processing of coal coking gas, comprising the steps of: introducing the coking gas into a hydration reactor so as to be in counter-current contact with hydrate working liquid coming from the top of a hydration reactor, leading methane contained in the coking gas and water in the hydrate working liquid to generate the hydration reaction to form a hydrate, meanwhile, hydrogen in the coking gas is concentrated to obtain the hydrogen with high concentration; wherein the operation pressure of the hydration reactor is 0.20-1.00MPa (absolute pressure), and the operation temperature is 3-15 DEG C. The formed hydrate can be further introduced into a hydrate decomposition device for decomposition, thereby releasing methane gas with high concentration. The invention simultaneously relates to a device for realizing the method for low-pressure processing of the coal coking gas. The application of the technology can separate out the coking gas under lower pressure and obtain the hydrogen with high concentration and the methane with high concentration, thereby reducing the energy consumption and the operation difficulty of the process and increasing the economic benefits.

Description

technical field [0001] The present invention relates to a method and device for processing coal coking gas, in particular, the present invention relates to a method of separating and treating coal coking gas by hydrate method under low pressure conditions to obtain high-concentration methane and high-concentration hydrogen respectively method, and a device for implementing the method. Background technique [0002] In the process of coal coking, there is always the release of gas, which is called coking gas. The main components of these coking gases are methane and hydrogen, and also contain a small amount of CO 2 and N 2 . It is estimated that the total amount of coking gas in my country exceeds 20 x 10 8 m 3 / year, reasonable and effective use of these coking gases is of great significance for environmental protection and improving the economic benefits of enterprises. [0003] At present, coking gas can be separated by cryogenic separation, membrane separation technol...

Claims

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Application Information

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IPC IPC(8): C01B3/34
Inventor 郭绪强陈光进
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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