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A hydration reactor and a method for separating methane in air-mixed coalbed methane using the reactor

A hydration reactor and coal bed gas technology, applied in chemical methods, chemical instruments and methods, and gas fuels for reacting liquid and gaseous media, can solve problems such as explosions, achieve operational safety, avoid explosion hazards, and are feasible strong effect

Active Publication Date: 2017-11-28
CHINA UNIV OF PETROLEUM (BEIJING)
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AI Technical Summary

Problems solved by technology

The existing hydrate separation method can make the separation of air-mixed coalbed methane in a water-saturated environment, but because the separation of hydrates needs to be carried out under a certain pressure, the compression and boosting treatment of air-mixed coalbed methane in the early stage also causes explosions. danger

Method used

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  • A hydration reactor and a method for separating methane in air-mixed coalbed methane using the reactor
  • A hydration reactor and a method for separating methane in air-mixed coalbed methane using the reactor

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Embodiment

[0036] Hydrate working fluid is tetrabutylammonium bromide (English abbreviation: TBAB), and its concentration is 10wt%;

[0037] The composition of mixed gas is shown in Table 1 below:

[0038] Table 1 Composition of air-mixed coalbed methane

[0039] composition

[0040] use as figure 1 The shown hydration reactor separates the methane in the air-mixed coalbed methane. For the specific separation method, please refer to the description of the above separation method. The process parameters involved are as follows:

[0041] 1) The pressure of mixed air CBM is 0.5MPa.

[0042] 2) Hydrate Working Fluid The temperature of the hydrate working fluid entering the hydration reactor is 8°C and the pressure is 3.0MPa.

[0043] 3) The pressure of the hydrate working fluid passing through the throat of the hydration reactor is 0.4MPa.

[0044] 4) The pressure of the fluid formed by the hydrate working fluid and the methane in the mixed gas in the stable section of the hydr...

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Abstract

The invention provides a hydration reactor and a method for using the reactor to separate methane in air-mixed coalbed methane. The hydration reactor has the following structure: the cavity of the hydration reactor has a narrowing section, a throat The flow areas of the pipe section, the expansion section, the stabilization section, and the throat section are all smaller than those of the shrinkage section, the expansion section, and the stabilization section, and the chamber of the hydration reactor is provided with an air inlet corresponding to the side wall of the throat section. The hydration reactor provided by the present invention utilizes the principle of fluid mechanics, utilizes the flow and pressure variation rules of the hydrate working fluid at different positions in the reactor, and realizes the processes of suction, self-boosting and hydration separation of mixed air coalbed methane , which avoids the danger of explosion in the process of pressurizing and conveying mixed air coalbed methane, and has the advantages of safe operation and strong feasibility for practical industrial application.

Description

technical field [0001] The invention relates to a hydration reactor and a method for separating methane in air-mixed coal bed gas by using the reactor, and belongs to the technical field of chemical industry. Background technique [0002] Coal bed methane (CBM for short), also known as coal mine gas or mine gas, is produced in the coal-forming process and mainly occurs in coal seams in the state of adsorption. It is an unconventional natural gas resource with methane as the main component. [0003] At present, the main methods of mining coalbed methane are surface drilling and underground extraction. Surface drilling technology is widely used in the development of coalbed methane in foreign countries. However, China's geological conditions are complex, and most of the coal seams have relatively poor air permeability. Restricted by technology and geological conditions, the current development of coalbed methane in China is mostly used underground Extraction technology. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J10/00C10L3/10
Inventor 郭绪强
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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