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Low heat value burnt gas high-temperature air combustion system and method

A high-temperature air and combustion system technology, applied in the direction of combustion methods, gas fuel burners, burners, etc., can solve the problems of gas leakage, affecting the safe operation of the system, and affecting the safety of the system, so as to prevent accidental combustion and leakage, improve The effect of energy efficiency

Inactive Publication Date: 2008-10-15
TONGJI UNIV
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Problems solved by technology

It should be pointed out that because the flow distribution of the flue gas in the gas channel is not easy to adjust, it is difficult to control the gas preheating temperature, which may cause gas cracking due to the high gas preheating temperature, which will have a certain impact on system safety.
In addition, because there is a certain amount of oxygen in the flue gas, it may cause combustion or explosion of the gas mixed with oxygen in the gas channel, seriously affecting the safe operation of the system
In addition, at the moment of gas reversing, gas leakage may also occur, increasing the risk of accidental combustion of gas

Method used

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  • Low heat value burnt gas high-temperature air combustion system and method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] A novel low calorific value gas high temperature air combustion system, including fuel pipeline 1, regenerators 2a and 2b, gas passage 3, two gas preheaters 4a and 4b, four-way reversing valve 5, workpiece 6, insulation layer 7 , gas solenoid valve 8, gas 10, flue gas 20, air 30, the two regenerators 4a and 4b are placed in the two gas passages 3, and the gas preheaters 4a and 4b are respectively placed in the regenerator After 4a and 4b.

[0024] When the burner A is in operation, the high-temperature flue gas 20 generated by the combustion first passes through the regenerator 2b, so that the sensible heat of the high-temperature flue gas 20 is accumulated in the regenerator 2b. The low-temperature flue gas 20 from the regenerator passes through the gas preheater 4b to preheat the gas 10, and is transported to the working burner A through the g...

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Abstract

The invention provides a novel high temperature air combustion system with lower calorific value, comprising a combustion chamber, a fuel pipeline, a gas passage, a fuel gas pre-heater, a heat retainer and a burner nozzle. The heat retainer is arranged in the air passage, and the fuel gas pre-heater is arranged at the back of the heat retainer. When the combustion system is operated, the fuel is pre-heated through smoke gas on one side of the gas passage, and the fuel is conveyed to the other side of the gas passage to burn. After one period, the fuel is conveyed reversely. The combustion is carried out by matching with the pre-heated air at a high temperature, which can improve the heat exchanging condition inside a furnace and improve the energy source utilization rate.

Description

technical field [0001] The invention relates to the technical field of low calorific value gas regenerative combustion devices, in particular to a low calorific value gas high temperature air combustion system. Background technique [0002] High temperature air combustion technology (HiTAC) is a new combustion technology developed in the 1990s, with high efficiency, energy saving and low NO. X The double superiority of emissions. In China, which vigorously promotes energy conservation and environmental protection, the development of HiTAC technology is of great significance. High-temperature air combustion technology is currently mainly used in metallurgical heating furnaces, glass melting furnaces and other industries, and will be further extended to industrial boilers, gasifiers, solid waste incinerators and other fields in the future, and has broad application prospects. [0003] For the combustion system using low calorific value fuel, if the fuel is not preheated, it ...

Claims

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Application Information

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IPC IPC(8): F23D14/66
CPCY02E20/34
Inventor 曹甄俊朱彤
Owner TONGJI UNIV
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