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Thermal storage type oxygen-enriched combusting method and device

An oxygen-enriched combustion and regenerative technology, which is applied in the direction of combustion method, combustion type, combustion equipment, etc., can solve the problems of high emission concentration and high exhaust temperature, and achieve lower exhaust temperature, simple system, and reduced exhaust volume Effect

Inactive Publication Date: 2008-10-08
TIANJIN SAIYANG INDAL FURNACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are two high-tech energy-saving technologies widely used at home and abroad—namely, high-temperature air combustion technology and oxygen-enriched combustion technology. Among them, high-temperature air combustion technology is the mixed combustion of high-temperature air and gas , the oxygen-enriched combustion technology is the mixed combustion of oxygen and gas, but both technologies have shortcomings. The pure regenerative high-temperature air combustion pursues the maximum recovery of waste heat from the flue gas. At the same time, it has serious defects in improving the quality of air combustion characteristics and reducing the amount of smoke per unit of fuel
The main disadvantages of simple oxygen-enriched combustion are high exhaust gas temperature and high NOx emission concentration (if measures to reduce NOx are not taken)

Method used

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  • Thermal storage type oxygen-enriched combusting method and device
  • Thermal storage type oxygen-enriched combusting method and device
  • Thermal storage type oxygen-enriched combusting method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 16.5Nm respectively 3 / h flow into oxygen, at 150Nm 3 / h flow into the producer gas and fully mix the producer gas and oxygen at the oxygen mixing nozzle of a regenerative oxygen-enriched burner, and spray them into the mixed gas conduit set in the center of the regenerator; The fully mixed producer gas and oxygen gas are mixed again with the combustion air preheated to 900°C at the nozzle of the burner and burned, and the combustion temperature reaches above 1400°C; the combustion air preheated to 900°C is The room temperature air blown through the four-way reversing valve passes through the heat exchange chamber in a regenerative oxygen-enriched burner, and the room temperature air exchanges heat with the high-temperature regenerator, absorbing the heat of the regenerator and being preheated. At the same time, another regenerative oxygen-enriched burner inhales high-temperature flue gas with a temperature of 1000°C from the furnace through a plurality of through hole...

Embodiment 2

[0027] 33Nm 3 / h flow into oxygen, at 300Nm 3 / h flow into the producer gas and fully mix the producer gas and oxygen at the oxygen mixing nozzle of a regenerative oxygen-enriched burner, and spray them into the mixed gas conduit set in the center of the regenerator; The fully mixed producer gas and oxygen gas are mixed again with the combustion air preheated to 950°C at the nozzle of the burner and burned, and the combustion temperature reaches above 1400°C; the combustion air preheated to 950°C is The room temperature air blown through the four-way reversing valve passes through the heat exchange chamber in a regenerative oxygen-enriched burner, and the room temperature air exchanges heat with the high-temperature regenerator, absorbing the heat of the regenerator and being preheated. At the same time, another regenerative oxygen-enriched burner inhales high-temperature flue gas with a temperature of 1050°C from the furnace through a plurality of through holes arranged alon...

Embodiment 3

[0029] 7Nm 3 / h flow into liquefied gas, with 300Nm 3The / h flow is passed into the producer gas and the above two gases are fully mixed at the oxygen mixing nozzle of a regenerative burner, and injected into the mixed gas conduit arranged in the center of the regenerator; the fully mixed The two gases and the combustion-supporting air preheated to 980°C are mixed again at the burner nozzle and burned, and the combustion temperature reaches 1400°C; the combustion-supporting air preheated to 980°C is produced by the The blown room temperature air passes through a heat exchange chamber in a regenerative burner, the room temperature air exchanges heat with a high temperature heat storage body, and absorbs the heat of the heat storage body to be preheated; at the same time, another heat storage body The high-temperature flue gas with a temperature of 1100°C is sucked in by the burner from the furnace through a plurality of through holes arranged along the circumference of the bur...

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Abstract

The invention discloses a heat accumulation type oxygen-enriched combustion method and apparatus, gas and oxygen or other gases are intensively mixed at oxygen mixing showerhead of the heat accumulation type oxygen-enriched combustor, and are sprayed into a mix gas duct arranged at center of a heat accumulation chamber, the intensively mixed gas is mixed again with combustion air pre-heated to 900-1000 DEG C at the showerhead of the combustor to combust; according to the invention, the heat accumulation type oxygen-enriched combustion apparatus comprises two heat accumulation type oxygen-enriched combustors, each of which comprises a heat accumulation chamber, a heat storage, mixture gas duct and a combustor showerhead, the heat accumulation chamber communicates with an air chamber, the air chamber communicates with a four-way valve, the oxygen mixing showerheads are separately arranged on ends of gas duct and oxygen duct. The method and device, employing the invention, have compact conformation, energy conservation, also can use low-calorie fuels as combustion air, can remarkably reduce exhaust smoke level and reduce smoke discharging temperature.

Description

technical field [0001] The invention relates to a combustion method and device, in particular to a regenerative oxygen-enriched combustion method and device. Background technique [0002] At present, there are two high-tech energy-saving technologies widely used at home and abroad—namely, high-temperature air combustion technology and oxygen-enriched combustion technology. Both technologies have disadvantages. The pure regenerative high-temperature air combustion pursues the maximum recovery of waste heat from the flue gas. The specific performance is to increase the preheating temperature of the air as much as possible, and at the same time reduce the exhaust gas temperature as much as possible. There are serious shortcomings in the quality of characteristics and the reduction of smoke emission per unit of fuel. The main disadvantage of simple oxygen-enriched combustion is the high exhaust gas temperature, NO x High emission concentration (if no reduction of NO x measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C1/00F23C1/08F23C5/08
CPCY02E20/34
Inventor 邱峰吴德荣
Owner TIANJIN SAIYANG INDAL FURNACE
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