Method and device for low pressure treatment of coal coking gas

A technology for coking gas and coal, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of low pressure and large energy consumption, and achieve the effect of reducing energy consumption and increasing economic benefits.

Inactive Publication Date: 2011-11-30
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 separation or high-pressure hydrate separation technology is used to separate coal coking gas, it needs to The coking gas is raised to the required high pressure condition, which consumes a lot of energy

Method used

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  • Method and device for low pressure treatment of coal coking gas
  • Method and device for low pressure treatment of coal coking gas
  • Method and device for low pressure treatment of coal coking gas

Examples

Experimental program
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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 according to the 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 ...

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 the hydration reactor 1 is 3.5°C, and the operating pressure is 0.96MPa; the hydrate working fluid is the oil phase solution and the water phase solution in a volume ratio of 4:1, wherein 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 ...

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 the 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 according to the 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 dialkylbenzen...

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Abstract

The invention relates to a method for treating coal coking gas at low pressure. The method comprises the steps of: introducing the coking gas into a hydration reactor, contacting the hydrate working liquid from the top of the hydration reactor in countercurrent contact, and hydrating the methane contained in the coking gas The water in the working liquid of the plant undergoes a hydration reaction to form a hydrate, and at the same time the hydrogen in the coking gas is concentrated to obtain high-concentration hydrogen; wherein, the operating pressure of the hydration reactor is 0.20-1.00 MPa (absolute pressure), and the operating temperature is 3~15℃. The formed hydrate can be further introduced into the hydrate decomposer for decomposition, releasing a high concentration of methane gas. The present invention also relates to a device for realizing the method for processing coal coking gas under low pressure. By applying the technology of the present invention, the coking gas can be separated under relatively low pressure to obtain high-concentration hydrogen and high-concentration methane, thereby reducing energy consumption and operation difficulty of the process and increasing 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 20×10 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 technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00
Inventor 郭绪强陈光进
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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