Method for promoting hydration, solidification and separation of coal mine mash gas mixture

A technology of mixed gas and coal mine gas, which is applied in the purification/separation of hydrocarbons, chemical instruments and methods, liquefaction, etc., can solve the problems of low concentration of gas and gas mixture, low growth rate of hydrate, and low separation efficiency, so as to accelerate the production of substances Effects of transfer and heat transfer, low equipment performance requirements, and large specific surface area

Inactive Publication Date: 2009-12-02
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0004] The present invention solves the problem of CH with a concentration of 59.8% existing in the hydration and solidification separation method of the existing coal mine gas mixed gas. 4 The induction time of hydrate formation was long at a concentrati

Method used

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The method for promoting the hydration and solidification separation of coal mine gas mixed gas in this embodiment is carried out according to the following steps: 1. Add a separation carrier accounting for 30% to 90% of the total volume of the reaction kettle into the reaction kettle; 2. Add the accelerator In the reaction kettle, use a vacuum pump to extract the air in the reaction kettle. The accelerator is a sodium dodecyl sulfate solution with a concentration of 0.1-0.4mol / L and / or a tetrahydrofuran solution with a concentration of 0.5-2mol / L. The amount of the accelerator added Add 0.3-0.8L per liter of reactor volume; 3. Use a gas pressurization system to press the mixed gas of coal mine gas into the reactor, and perform hydration under the conditions of operating temperature 0-5°C and operating pressure 4-11MPa Solidification; 4. In step 3, the hydrate enters the storage tank, and after hydration and solidification, the gas is discharged in...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, a separation carrier accounting for 30% of the total volume of the reactor is added to the reactor. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, a separation carrier accounting for 50% of the total volume of the reactor is added to the reactor. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for promoting hydration, solidification and separation of a coal mine mash gas mixture, which relates to a method for promoting separation of mash gas. The method solves the problems that the prior method for hydrating, solidifying and separating the coal mine mash gas mixture has long induction time of generating a hydrate of 59.8 percent CH4, low growing rate of a hydrate of 40.4 percent CH4, low concentration of the CH4 in the mash gas mixture, and low separation efficiency. The method comprises the following steps: firstly, adding a separation carrier; secondly, adding an accelerating agent into a reaction kettle, and then pumping out air; thirdly, extracting the mash gas from a coal mine and compressing the mash gas into the reaction kettle to perform the hydration and the solidification; and fourthly, making the hydrates after the hydration and the solidification enter into a storage tank to finish the operation. In the method, the induction time of growing the hydrate of 59.8 percent CH4 is 51 minutes. The concentration of the CH4 in the mash gas mixture is improved by more than 10 percent, and the separation efficiency is high. The growing rate of the hydrate of 40.4 percent CH4 reaches up to 23.03*10 mol per minute.

Description

technical field [0001] The invention relates to a method for promoting the hydration solidification separation of gas gas. Background technique [0002] Coal mine gas is an important source of danger for mine safety production, a clean energy that can be used, and a major industrial gas that damages the environment. According to statistics, my country's high gas and gas outburst mines account for about half of all mines, and the annual death toll caused by gas accidents accounts for 1 / 3 of the total death toll in coal mine accidents. important meaning. It can be seen that the key to the utilization of coal mine gas is CH 4 separation and concentration. At present, there are mainly separation technologies such as pressure swing adsorption method and low-temperature separation method, but the existing gas separation methods generally have high separation costs, and the methane concentration in the gas extraction must reach more than 40% in order to realize the separation of ...

Claims

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Application Information

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IPC IPC(8): F25J1/00F25J3/08C07C7/00C07C9/04
Inventor 吴强张保勇孙登林黄桂芝
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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