Gas combustion system and method with wide combustion heat value applicability

Abstract

The invention discloses a gas combustion system and method with wide combustion heat value applicability. The system comprises a boiler body, a combustor located above the boiler body, a heat storageplate at the outlet of the combustor, two circulating flue gas feeding channels at two sides above the boiler body, and a high-temperature circulating flue gas extraction channel and a low-temperaturecirculating flue gas extraction channel at the right side of the boiler body. The circulating flue gas feeding channels and the circulating flue gas extraction channel are connected through a flue gas pipeline, a valve is installed on the flue gas pipeline connected with the circulating flue gas extraction channel, an induced draft fan is installed on a flue gas pipeline main pipeline, the heat storage plate is connected with the top of the boiler body through a hinge, and the position of the heat storage plate can be adjusted through the hinge. Through adjusting the opening and closing states of the high-temperature flue gas extraction channel and the low-temperature flue gas extraction channel, the purpose that the system can combust both low-heat-value gas and high-heat-value gas is achieved, and the phenomena that the low-heat-value gas is combusted unstably during combustion, the temperature of a combustion area is too high during combustion of the high-heat-value gas and the like can be avoided.

Description

technical field [0001] The invention relates to the technical field of thermal energy and power engineering, in particular to a gas combustion system and method with wide applicability of combustion calorific value. Background technique [0002] With the increasing emergence of environmental and energy issues, scholars have begun to explore new energy sources that can replace traditional fuels such as coal and oil. In recent years, in the field of fuel-fired boiler research, gas has been used as fuel for combustion. However, gas fuels include high-quality fuel natural gas with high calorific value, and blast furnace gas and coke oven gas with low calorific value. Wait. Low calorific value gas is rich in resources in my country, but its utilization rate has always been low, and it is directly discharged into the air, which not only pollutes the environment, wastes energy, but also causes a series of social problems. When the high calorific value gas is burned, due to the su...

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Problems solved by technology

Low calorific value gas is rich in resources in my country, but its utilization rate has been low, and it is directly discharged into the air, which not only pollutes the environment, but also wastes energy, and at the same time causes a series of social problems

When the high calorific value gas is burned, due to the sufficient fuel and high oxygen content at the burner outlet, the combustion is violent, the flame stability is poor, and local high temperature is formed. Nitrogen is easily oxidized into a large amount of thermal NO at high temperature. x

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