Hydration reactor and method for separating methane in coalbed methane-air mixture by using same

A hydration reactor, coalbed methane technology, applied in chemical methods, chemical instruments and methods, gas fuels and other directions for reacting liquid and gas medium, can solve problems such as explosion, achieve safe operation, avoid the danger of explosion, and is feasible strong effect

Active Publication Date: 2016-03-30
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

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  • Hydration reactor and method for separating methane in coalbed methane-air mixture by using same
  • Hydration reactor and method for separating methane in coalbed methane-air mixture by using same

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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 mixed air CBM

[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) When the hydrate working fluid enters the hydration reactor, the temperature 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 hydration reactor is 2.5 MPa.

[004...

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Abstract

The invention provides a hydration reactor and a method for separating methane in a coalbed methane-air mixture by using the same. The hydration reactor has the following structure: a hydration reactor cavity is provided with an inlet section, a throat tube section and a stable section along the flow direction of a hydrate working fluid, and the circulation area of the throat tube section is less than the circulation area of the inlet section and the circulation area of the stable section; the side wall, corresponding to the throat tube section, of the hydration reactor cavity is provided with a gas inlet. The hydration reactor provided by the invention adopts the principle of fluid mechanics, utilizes the change law of flowing of the hydrate working fluid at different positions in the reactor with the pressure, realizes the suction, self boosting and hydration separation processes of the coalbed methane-air mixture, omits the required step of carrying out compression boosting on the coalbed methane-air mixture during separation of methane in the coalbed methane-air mixture in a conventional hydration separation method, avoids dangerousness of explosion in the coalbed methane-air mixture compression and pressurization transport processes, and has the advantages of safe operation, and high actual industrial application feasibility.

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 exists in coal seams in an adsorbed state. 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 methan...

Claims

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Application Information

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