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Membrane type water cooled low NOx gas combustion device

A technology of gas combustion and water cooling, which is applied in the direction of gas fuel burners, burners, combustion methods, etc. It can solve the problems of high air cleanliness, inability to realize large-scale design, low cost performance of miniaturization, etc., and achieve the expansion of combustion load range, increasing the effective radiation area, and reducing the temperature

Pending Publication Date: 2019-03-08
JIANGSU SHUANGLIANG BOILER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these two technical routes, the first technical route has a wider range of applications and mature combustion stabilization technology, but it also has complex systems, high energy consumption, and 30mg / m 3 It is its emission limit, miniaturization and low cost performance.
The second technical route is also widely used, but it also has many shortcomings: ① Higher requirements for air cleanliness; ② The surface is easy to block ash and sinter, ③ High temperature is easy to temper; ④ High air excess coefficient is required to achieve low NO x , high energy consumption
The third technical route also has some applications, which solves the problems in the second technical route, but there are also some shortcomings: ①The integrated design of the burner combined with the boiler, there is no separate combustion device for sale in the market, and it is impossible to use the existing Gas boiler for low NO x Renovation; ②The combustion grate adopts vertical tubes + water-cooled pores, and the structure is complex; ③Uses a large flat structure, the flow field uniformity is poor, and it is easy to temper with small loads; ④The capacity of a single combustion head is limited, and large-scale design cannot be realized

Method used

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  • Membrane type water cooled low NOx gas combustion device
  • Membrane type water cooled low NOx gas combustion device
  • Membrane type water cooled low NOx gas combustion device

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] figure 1 For the membrane type water-cooled low NO of the present invention x Diagram of a gas burner. Such as figure 1 As shown, the membrane water-cooled low NO of the present invention X The gas combustion device includes a cylindrical membrane-type water-cooled combustion head 1, a circular water chamber 2, a flow equalization device 3, an air-fuel mixing device 4, an ignition and flame detection integration device 5, a fire viewing hole 6, a fan 7, and an air inlet silencer Device 8, burner connecting flange 9, water inlet and outlet 10 and gas inlet 11. The membrane water-cooled combustion head 1 is fixedly connected with the annular water chamber 2, the air-fuel mixing device 4 is fixed on the annular water chamber 2, the fan 7 is connected with the air-fuel mixing device 4 connection, the fan 7 is provided with an air inlet muffler 8.

[0028] fi...

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Abstract

The invention provides a membrane type water cooled low NOx gas combustion device. A cylindrical membrane type water cooled combustion head, a ring-shaped water chamber, a flow sharing device, an air-fuel mixing device, an ignition and fire detection integrated device, a fan, an air inlet silencer, a burner connection flange, a water inlet and outlet, and a gas inlet are included, the membrane type water cooled combustion head is fixedly connected with the ring-shaped water chamber, the air-fuel mixing device is fixed on the ring-shaped water chamber, and the fan is connected with the air-fuelmixing device and provided with the air inlet silencer. The membrane type water cooled low NOx gas combustion device can be installed horizontally, vertically or obliquely, is convenient to disassemble and replace, and can be suitable for existing gas boilers with any forms. According to the membrane type water cooled low NOx gas combustion device, the structure is simple, processing is easy, theflue-gas temperature can be effectively lowered, internal flue-gas recirculation is formed, the effective radiating area of a furnace is increased, and the combustion flame front temperature is lowered, so that production of NOx is lowered.

Description

technical field [0001] The invention belongs to gas low NO x In the field of combustion technology, it specifically relates to a membrane-type water-cooled low-NO x Gas burner. Background technique [0002] In recent years, with the country's emphasis on environmental protection issues, the NO x Emission requirements are becoming more and more stringent, and the emission standard has changed from the original requirement of 400mg / m 3 to 150mg / m 3 , to 80mg / m 3 , and even some cities and regions directly limit the standard to no more than 30mg / m 3 It only took 2-3 years to change the whole standard; moreover, the Ministry of Environmental Protection is also brewing and researching 5mg / m 3 emission indicators, which shows the country's urgent requirements for low nitrogen emissions from gas-fired boilers, which also makes low NO x Combustion technology has been widely used. [0003] At present, foreign countries have adopted a variety of new low NO x burner, its NO x...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/02F23D14/62F23C9/08
CPCF23C9/08F23D14/02F23D14/62
Inventor 雷钦祥汪新球王殿董黎明李静吴艳
Owner JIANGSU SHUANGLIANG BOILER
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