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Boiler dusting pipe and circulating fluidized bed boiler

A circulating fluidized bed and boiler ash removal technology, applied in the field of boiler ash removal tubes, can solve problems such as affecting the normal operation of the boiler, cracking of heat-resistant plastics, labor and material resources, etc.

Inactive Publication Date: 2011-10-19
COFCO GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat-resistant plastic cracks and falls off the steel pipe after a period of use
For this reason, it is necessary to maintain or replace the ash removal pipe of the circulating fluidized bed boiler every time, which consumes manpower and material resources and affects the normal operation of the boiler.

Method used

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  • Boiler dusting pipe and circulating fluidized bed boiler
  • Boiler dusting pipe and circulating fluidized bed boiler
  • Boiler dusting pipe and circulating fluidized bed boiler

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Experimental program
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Embodiment Construction

[0013] Such as figure 2 As shown, the boiler ash removal pipe provided by the present invention includes a heat-resistant pipe 91, a soft heat-insulating layer 92 coated on the outer surface of the heat-resistant pipe 91, and a A layer of refractory bricks 93 on the surface.

[0014] According to the boiler ash removal pipe provided by the present invention, in order to save space and achieve an ideal heat insulation effect, the ratio of the wall thickness of the heat-resistant pipe 91 to the thickness of the soft heat insulation layer 92 may be 1 : 0.2-20, preferably 1: 2-15; the ratio of the wall thickness of the heat-resistant pipe 91 to the thickness of the refractory brick layer 93 may be 1: 1-100, preferably 1: 5-90.

[0015] In the present invention, the thicknesses of the heat-resistant pipe 91, the soft heat insulation layer 92 and the refractory brick layer 93 in the boiler ash removal pipe are not particularly limited, and can be determined according to the needs ...

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Abstract

The invention provides a boiler dusting pipe comprising a heat resisting pipe (91), a soft thermal-protective coating (92) wrapping the outer surface of the heat resisting pipe (91), and a fire proofing tile layer (93) wrapping the surface of the soft thermal-protective layer (92). The invention also provides a circulating fluidized bed boiler comprising the boiler dusting pipe. As the thermal-protective coating of the boiler dusting pipe is not east to fall off, manpower and material resources additionally consumed for maintaining the boiler dusting pipe can be saved, thereby improving the working efficiency of the circulating fluidized bed boiler comprising the boiler dusting pipe.

Description

technical field [0001] The invention relates to a boiler ash removal tube and a circulating fluidized bed boiler comprising the boiler ash removal tube. Background technique [0002] When the fluid passes through the solid particles, the solid particles start to move as the fluid velocity gradually increases, and the friction between the solid particles is also increasing. When the flow rate reaches a certain value, the friction between the solid particles and Their gravity is equal, each particle can move freely, and all solid particles exhibit a phenomenon similar to a fluid state, which is called fluidization. Solid particles (bed material), fluid (fluidization wind) and equipment that completes the fluidization process are called fluidized beds. [0003] In a fluidized bed, solid particles present five different flow states with the increase of air velocity, which are respectively called: fixed bed, turbulent (turbulent) flow fluidized bed, fast fluidized bed, and pneum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/24
Inventor 岳国君贾成国秦鹏里柳树海严明奕邓立康王利
Owner COFCO GROUP