Inclined porch-free corner-tube full film-type wall-circulating fluidized bed boiler

A circulating fluidized bed and membrane wall technology, which is applied in water tube steam boilers, fluidized bed combustion equipment, boiler water pipes, etc., can solve the problem of difficult to realize full membrane wall sealing structure and large capital investment of circulating fluidized bed boilers , increase the power consumption of the induced draft fan, etc., to achieve the effect of saving refractory materials, facilitating on-site installation, and good thermal insulation performance

CN101514811AInactive Publication Date: 2009-08-26XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-08-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention disclosed an inclined porch-free corner-tube full film-type wall-circulating fluidized bed boiler, which employs a corner-tube self-support structure, an inclined porch-free arrangement and water-cooling built-in horizontal volute cyclone separator structure, a combustion chamber and a convection vertical shaft employ a full film-type water-cooling wall structure, the convection vertical shaft is internally provided with a screen-type evaporation heating surface, a flag-type or serpentine tube-type convection heating surface; the structure is compact in the arrangement, smooth in the flow of smoke gases and diminished in flow resistance; the structure is liable for being systematized in design, standardized in manufacturing, integrated in conveying components and modularized in on-site installation; the structure, with short installation period at the construction site, can greatly save material and has the characteristics of high combustion efficiency and small power consumption of an induced draft fan.
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Description

technical field

[0001] The invention relates to a circulating fluidized bed boiler, in particular to a full-membrane wall circulating fluidized bed boiler without corridor corner tubes. Background technique

[0002] Circulating fluidized bed boiler is a coal-fired boiler developed in the 1980s. Compared with pulverized coal and layer combustion, circulating fluidized combustion has the advantages of high-efficiency combustion and low pollution emissions, and is known internationally as clean combustion. technology.

[0003] The circulating fluidized bed boiler adopts a higher fluidization velocity than the bubbling bed, so there is no longer a clear distinction between the bed surface and the dense-dense phase bed like the bubbling bed, and a large amount of material is entrained to the upper part of the furnace by the high-temperature flue gas , through the high-temperature separator arranged at the furnace outlet, the material is separated from the flue gas, and the separ...

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Embodiment Construction

[0036] The structural principle and working principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] see figure 1 , figure 2 , the present invention includes corner tubes 13, 18, 27, 28 arranged at the four corners of the boiler, lower headers 2, 40 at the bottom and upper headers 16, 19, 20, 22, 23, 24 at the top, horizontal single boiler The frame type self-supporting structure system composed of cylinder 17 is connected to the front wall membrane water cooling wall 12 and the rear wall membrane type Water cooling wall 32, left wall membrane water cooling wall 25, right wall membrane water cooling wall 15, middle double-sided exposure water cooling wall 26, 31 heating surface and flag arranged on the left wall membrane water cooling wall 25 of convection shaft 49 Type tube bundle economizer 41, superheater 42 arranged above the economizer 41.

[0038] The front wall membrane type water cooling wall 12 ex...