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Fluidization-suspending two-stage type compound combustion device

A combustion device, a two-stage technology, is applied in the direction of fluidized bed combustion equipment, fuel burning in a molten state, combustion chamber, etc., to achieve the effect of intensifying combustion, sufficient combustion, and reducing the generation of nitrogen oxides

Inactive Publication Date: 2008-06-11
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the bubbling fluidized bed combustion chamber and the suspension combustion chamber of the existing combustion device are integrated so that the two have mutual thermal influence and flow influence, it is impossible to fully burn the particle size or Combustion of two solid fuels with different activities, and then provides a fluidized-suspension two-stage composite combustion device

Method used

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  • Fluidization-suspending two-stage type compound combustion device
  • Fluidization-suspending two-stage type compound combustion device
  • Fluidization-suspending two-stage type compound combustion device

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specific Embodiment approach 1

[0008] Embodiment 1: As shown in Figure 1, the fluidized-suspension two-stage composite combustion device of this embodiment consists of a bubbling fluidized bed low-temperature combustion chamber 3, a high-temperature vortex suspension combustion chamber 7, a variable-diameter section chamber body 5, Composed of horizontal flue 15 and tail flue 16, the high-temperature vortex suspension combustion chamber 7 is located above the bubbling fluidized bed low-temperature combustion chamber 3, and the lower end of the high-temperature vortex suspension combustion chamber 7 is connected to the bubbling fluidized-bed low-temperature combustion chamber 3 The upper end of the upper end communicates with the chamber body 5 through the variable diameter section, the lower end of the high-temperature vortex suspension combustion chamber 7 communicates with one end of the horizontal flue 15, and the other end of the horizontal flue 15 communicates with the upper end of the tail flue 16.

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specific Embodiment approach 2

[0010] Specific embodiment two: As shown in Figure 1, the variable diameter section chamber body 5 in this embodiment is composed of a tapered section chamber body 11, a constant diameter section chamber body 12, and a gradually expanding section chamber body 13. The upper end of the chamber body 11 is affixed to the lower end of the chamber body 13 of the expanding section through the chamber body 12 of the constant diameter section. The variable-diameter chamber body 5 is mainly used to separate the bubbling fluidized bed low-temperature combustion chamber 3 and the high-temperature vortex suspension combustion chamber 7 into two relatively independent combustion spaces, organize the flue gas flow after the bubbling fluidized bed combustion, and increase The residence time of the particles, and the formation of a drop channel for the large slag generated by suspended combustion. The cross section of the variable diameter section chamber body 5 can be rectangular, square, cir...

specific Embodiment approach 3

[0011] Embodiment 3: As shown in FIG. 1 , the angle β formed between the chamber body 13 of the expanding section and the horizontal plane in this embodiment is greater than or equal to the angle of repose of the flow of slag particles. By changing the angle and size of the chamber body 5 of the reducing section, it can meet the needs of burning different fuels in the upper and lower parts. Other compositions and connections are the same as those in the second embodiment.

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Abstract

A fluidizing and suspension type compound burning device is provided, which relates to a burning device. The invention resolves the problem as mutual heat influence and mutual flow influence of a bubbling fluidized bed firebox and a suspension firebox of the existing burning device for the two are integrated, thus incapable of symmetrically burning two solid fuels with different grain diameters and burning activities sufficiently in one burning device. The invention comprises a bubbling fluidized bed low temperature firebox (3), a high temperature swirl suspension firebox (7) and a transition section chamber body (5); wherein, the high temperature swirl suspension firebox (7) is located over the bubbling fluidized bed low temperature firebox (3), which is communicated with upper end of the bubbling fluidized bed low temperature firebox (3) through the transition section chamber body (5) with lower end. The invention has the advantages of high burning efficiency and sufficient burning, which realizes the sufficient burning of two solid fuels of different burning grain diameters and burning activities symmetrically in one burning device.

Description

technical field [0001] The invention relates to a combustion device, in particular to a combustion device capable of performing two combustion modes of fluidization and suspension at the same time. Background technique [0002] As a clean coal combustion technology with low pollution and good adaptability to coal types, fluidized bed combustion technology has been widely used in the past three decades. However, compared with the same type of pulverized coal furnace, this combustion method still has the disadvantages of high carbon content in fly ash and low combustion efficiency, which affects the promotion and application of this combustion technology. One of the reasons for the high carbon content of fly ash is that the fuel particle size distribution is relatively wide, and the small particle size particles in it do not have enough residence time in the combustion chamber. How to choose an efficient combustion method according to the particle size distribution of fuel an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C6/04F23C10/00
Inventor 孙锐王正阳孙绍增朱群益赵广播邓启刚秦裕琨
Owner HARBIN INST OF TECH
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