Real-time sampling device for methane detection in the drainage outlet of coalbed methane development process

Abstract

The invention provides a real-time sampling device suitable for being used in methane detection in a water drainage port during coal bed methane development. The device comprises a closed water tank,the top of the water tank is provided with a gas outlet, a water inlet is arranged at the upper part of the sidewall of the water tank, and a water outlet is arranged at the lower part of the sidewallof the water tank; a spirally downward water channel is arranged in the water tank, one side of the water channel is close to the inner wall and is in point-like connection with the inner wall, a silt for water to downward flow exists between the non-point-like connection position of the one side and the inner wall, a water baffle plate is arranged at the other side of the water channel to blockthe water from flowing out from the other side, and the starting position of the water tank communicates with the water inlet to introduce all gas and water mixture discharged from the water drainageport and directly discharged methane gas into the channel; and the water tank is also provided with a liquid level controller to keep the liquid level in the water tank at the plane of the water outlet during the detection. The sampling device guarantees the reliability, the accuracy and the real-time property of a detection result.

Description

technical field [0001] The invention relates to a real-time sampling device suitable for detecting methane in a drainage outlet in the coalbed methane development process, and belongs to the technical field of gas leakage and escape detection in the coalbed methane development process. Background technique [0002] my country is rich in coalbed methane resources. As of 2014, the proven recoverable volume is about 270 billion cubic meters. As the most important methane gas resource, coalbed methane is considered to be one of the most promising clean energy sources. However, the escape and leakage of methane and other greenhouse gases in the process of coalbed methane development affect the realization of economic, social and environmental benefits of coalbed methane development to a certain extent. [0003] Methane escape and leakage in the process of coalbed methane development mainly include methane escape at the drainage outlet, methane escape at the packing, and equipment...

AI Technical Summary

Problems solved by technology

When using the above-mentioned method for methane detection, it is difficult to guarantee the reliability, accuracy and real-time performance of the detection results due to the influence of factors such as the intermittent emission of methane at the drainage outlet, the outside air, and some gases dissolved in the drainage water.

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