Oxygen-enriched combustion radiant tube heaters

A radiant tube heater and oxygen-enriched combustion technology, applied in burners, gas fuel burners, combustion methods, etc., can solve the problems of poor flue gas waste heat recovery and thermal efficiency problems, and improve stability and reliability. , Improve the heat utilization rate and improve the effect of heat exchange

Inactive Publication Date: 2007-10-31
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

However, since the heat storage body needs regular maintenance and replacement, and the heat storage body also has ther

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  • Oxygen-enriched combustion radiant tube heaters
  • Oxygen-enriched combustion radiant tube heaters

Examples

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Example Embodiment

[0013] 1. The ejector is located on the outside of the furnace wall in the radiant tube system structure, consisting of oxygen or oxygen-enriched air 1, fuel 2, oxygen or a mixture of oxygen-enriched air and combustion flue gas 3, combustion gas 4, and flue gas in the radiant tube 5. It is composed of flue gas 6, flue gas ejector 7, burner 8, furnace wall 9, and radiant tube 10. The ejector is located on the outside of the furnace wall. Although it is easy to install, it has a certain degree of radiation and convection heat exchange to the environment, which is unfavorable to the environment outside the furnace.

[0014] 2. The ejector is located on the inner side of the furnace wall. The structure of the radiant tube system consists of oxygen or oxygen-enriched air 1, fuel 2, oxygen or a mixture of oxygen-enriched air and combustion flue gas 3, combustion gas 4, and flue gas in the radiant tube 5. It is composed of flue gas 6, flue gas ejector 7, burner 8, furnace wall 9, and rad...

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Abstract

A radiant-tube heater of oxygen-enriched combustion belonging to the field of environmental protection relates to a new method of oxygen-enriched combustion technology applicable to radiant-tube heater, to develop a combustion system of novel industrial radiant tube that combusts the low-calorific value gas (or other fuel gas) to increase the heat utilization, which is characterized in that the heater comprises oxygen or oxygen-enriched air (1), fuel (2), mixed gas (3) of oxygen or oxygen-enriched air and smoke gas, fuel gas (4), smoke gas (5) in the radiant tube, smoke gas (6) discharged from the radiant tube, a smoke gas injector (7), a combustor (8), a boiler wall (9) and a radiant tube (10). The heater has low combusting temperature, low content of harmful gas like NOx in the smoke gas and high heat efficiency, and is good for collecting the smoke, in particular to CO2 and increases the stability and reliability of the system.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a new method for applying oxygen-enriched combustion technology to a radiant tube heater. Industrial radiant tube combustion system. Background technique [0002] At present, heating equipment such as metal heat treatment that requires the use of protective gas mostly uses radiant heaters, especially gas-fired radiant tubes are widely used in strip continuous annealing furnaces. In order to improve the thermal efficiency of the radiant tube, people developed the regenerative radiant tube in the late 1980s, which greatly improved the thermal efficiency. However, since the heat storage body needs regular maintenance and replacement, and the heat storage body also has thermal efficiency problems in the process of heat exchange, it is not the best for the recovery of waste heat from flue gas. Contents of the invention [0003] The purpose of the present invention is to const...

Claims

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Application Information

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IPC IPC(8): F23D14/32F23D14/12F27B9/36
CPCY02E20/34
Inventor 温治豆瑞锋
Owner UNIV OF SCI & TECH BEIJING
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