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Hydration reactor, and method therewith for separating methane from coalbed methane-air mixture

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 the danger of explosions, and be feasible strong effect

Active Publication Date: 2016-04-20
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 therewith for separating methane from coalbed methane-air mixture
  • Hydration reactor, and method therewith for separating methane from coalbed methane-air mixture

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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) 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 hydration reacto...

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Abstract

The invention provides a hydration reactor and a method therewith for separating methane from coalbed methane-air mixture. A chamber of the hydration reactor includes, in the flowing direction of a hydrate working fluid, a shrinkage section, a throat pipe section, an enlarged section and a stable section, wherein the flow area of the throat section is less than those of the shrinkage section, the enlarged section and the stable section. A gas inlet is formed on the side wall, which is corresponding to the throat pipe section, of the chamber of the hydration reactor. Through fluid mechanics principle, the hydration reactor achieves suction, self-pressurization and hydration separation of the coalbed methane-air mixture are achieved through change principles of pressure and flowing in different positions of the reactor, thereby avoiding explosion risk during pressurization and pressurized transportation of the coalbed methane-air mixture. The hydration reactor is safe to operate and is strong in practical industrial application availability.

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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