Device and method for mixing LNG fuel into methane electric generator set

Abstract

The invention relates to a device for mixing LNG fuel into a methane electric generator set. The device comprises a main methane conveying pipe, an LNG storage tank, a heat exchanger and an LNG gasification device. The heat exchanger is arranged inside the main methane conveying pipe. The heat exchanger is provided with an LNG inlet and an LNG outlet. The LNG inlet is communicated with the LNG storage tank through a first pipeline. The LNG outlet is communicated with the LNG gasification device through a second pipeline. The LNG gasification device is arranged on the main methane conveying pipe. The LNG fuel mixing can be achieved. When the methane concentration is fluctuated around 8%, the existing methane electric generator set can be fully utilized, and the utilization ratio of the device is improved. When the methane concentration is lower than 8%, the methane can be fully utilized, and the utilization space and the utilization ratio of the fuel are improved. Meanwhile, deep separating can be carried out on water which is in a free state and inside methane gas by the heat exchanger, and the electric generating efficiency of the electric generator set is favorable to be improved.

Description

technical field [0001] The invention relates to a gas generating set mixing LNG fuel equipment and method, belonging to the field of low-concentration gas utilization equipment. Background technique [0002] According to the gas concentration, the gas utilization in the market is mainly divided into the following categories: one is a high-concentration gas generator set, which requires a gas concentration of more than 30% for power generation; the other is a low-concentration gas generator set, The required gas concentration is generally 8%-30% for power generation; one is to treat the gas with a particularly low concentration by exhaust air oxidation; the other is to directly use the gas with a concentration greater than 30% as fuel. [0003] After long-term market survey data accumulation, it is found that the gas concentration of some coal mines often fluctuates around 8%, while domestic gas concentration below 8% is basically unusable. At present, some dual-fuel units i...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a gas generator set blending LNG fuel equipment and method to overcome the problem of energy waste caused by the inability to realize the utilization of gas with a concentration lower than 8% in the low-concentration gas generator set in the prior art defect

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