Gas engine using low calorie gas fuel

Abstract

Provided with a gas engine using low calorie gas, e.g. coal mine methane, having the concentration of methane of 50% or less as fuel in which the concentration of methane is increased so that low calorie gas injected into a subchamber can be ignited by an ignition plug and combusted. The gas engine using low calorie gas having the concentration of methane of 50% or less as fuel performs pressure swing adsorption treatment (PSA treatment) for obtaining methane gas having high concentration of methane by carrying low calorie gas into a PSA treatment unit and separating impurities from the low calorie gas by adsorption, and the gas subjected to such a PSA treatment is introduced into the prechamber where the gas is ignited by an ignition plug and combusted.

Description

technical field [0001] The invention relates to a gas engine using low calorific value gas fuel, which uses coal mine methane and other low calorific value gas whose methane concentration is as low as 50% or less as fuel, arranges spark plugs in the auxiliary combustion chamber, and injects the low calorific value gas into the auxiliary combustion chamber And through the ignition of the spark plug, the ignition flame produced by ignition and combustion in the auxiliary combustion chamber is sprayed to the main combustion chamber through the communication hole connecting the auxiliary combustion chamber and the main combustion chamber, and the flame is connected to the main combustion chamber through the ejected flame. The secondary combustion chamber side is separated and combusted by the mixed gas in the main combustion chamber formed by the low calorific value gas sucked in through the air inlet. Background technique [0002] A gas engine that uses coal mine methane and ot...

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Problems solved by technology

[0025] Therefore, as described in Patent Document 2, a mechanism is used in which a lean fuel mixture is filled with a first fuel that forms a lean mixture and a second fuel that burns faster than the first fuel and has a stronger ignition performance. The main combustion chamber, filling the secondary combustion chamber with the second fuel, using the first fuel that forms a lean mixture and the second fuel that burns faster than the first fuel and has a stronger ignition performance, and fills the main combustion chamber with a lean mixture 1. Fill the secondary combustion chamber with the second fuel, but this mechanism cannot be directly applied to engines fueled by low calorific value gas with methane concentration as low as 50%

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