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Burner, boiler equipped with the burner, and method for assembling the burner

A technology of burners and stoves, applied in the direction of combustion methods, burners, burners burning powder fuel, etc., can solve the problems of disorder, cost increase, combustion impact, etc., and achieve the effect of preventing damage

Active Publication Date: 2020-11-27
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the case of separating the rectifying plate into an upstream part and a downstream part and using different materials as in Patent Document 1, the cost may increase
In addition, since the structure is separated into an upstream part and a downstream part, the flow of fuel gas may be disturbed in the gap between the upstream part and the downstream part, which may affect combustion.

Method used

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  • Burner, boiler equipped with the burner, and method for assembling the burner
  • Burner, boiler equipped with the burner, and method for assembling the burner
  • Burner, boiler equipped with the burner, and method for assembling the burner

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0078] Below, use Figure 1 to Figure 9 The burner of the first embodiment will be described.

[0079] The burner 1 of the present embodiment mainly burns fine powder fuel obtained by pulverizing solid fuel with a grinder, and is installed in a boiler (not shown). A plurality of burners 1 are provided for a boiler having heat exchangers such as a superheater and an evaporator in a flue, and form flames in the furnace.

[0080] figure 1 The illustrated burner 1 has an inner fuel nozzle 2 and an air nozzle 3 surrounding the fuel nozzle 2 .

[0081] It should be noted that, in this embodiment, the upper side and the lower side of the paper are for the convenience of describing the drawings described, and do not represent the vertical upper side and the vertical lower side. In the actual burner 1 In the usage mode of , the upper side of the paper may face the horizontal direction.

[0082] The fuel nozzle 2 has a substantially rectangular cross section when viewed from the fro...

no. 2 approach 〕

[0100] Next, use Figure 10 The separation plate included in the burner of the second embodiment will be described.

[0101] This embodiment differs from the first embodiment described above in the form of the high-temperature member 50 , and is the same in other respects. Therefore, only the points of difference from the first embodiment will be described, and the same reference numerals will be used for other parts, and descriptions thereof will be omitted.

[0102] Such as Figure 10 As shown, the separation plate 10B of this embodiment has a structure in which the high-temperature member 50 can be divided in the width direction by the width dividing portion 58. Two components of the lower high temperature component 50B.

[0103] The positioning part 59 is formed in the upper high temperature member 50A and the lower high temperature member 50B so that it may fit in a concave-convex shape, and it is comprised so that both members may be easily positioned. It should be n...

no. 3 approach 〕

[0110] Next, use Figure 11 and 12 The separation plate included in the burner of the third embodiment will be described.

[0111] This embodiment differs from the first and second embodiments described above in the form of the high-temperature member 50 , and is the same in other respects. Therefore, only the points of difference from the first embodiment and the second embodiment will be described, and the same reference numerals will be used for other parts, and descriptions thereof will be omitted.

[0112] Such as Figure 11 As shown, the divided high-temperature members 50 (upper high-temperature member 50A and lower high-temperature member 50B) of the separation plate 10C of this embodiment are connected by a plurality of connecting pins 74 such as bolts and nuts, for example.

[0113] Connecting pin holes 54 into which a plurality of connecting pins 74 are respectively inserted are formed in the upper high temperature member 50A and the lower high temperature member...

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Abstract

An object of the present invention is to provide a burner capable of preventing damage to a separator even when the separator is exposed to high temperature, a boiler including the burner, and a method of assembling the burner. The burner is provided with: a fuel nozzle for blowing fuel gas mixed with fuel and an oxidizing gas into the furnace; The separation plate (10A) has a widened part (12) whose width expands in the fuel gas flow direction and is connected to the fuel gas flow upstream side of the widened part (12) and faces toward A plate-shaped portion extending on the upstream side of the fuel gas flow, the burner is characterized in that the separation plate (10A) is divided into two or more division members (30, 50) between the upstream side and the downstream side of the fuel gas flow. )constitute.

Description

technical field [0001] The present invention relates to a burner, a boiler equipped with the burner, and a method for assembling the burner. Background technique [0002] Among the combustors that realize low NOx combustion by an internal flame retainer, there is a burner having a structure in which a flame retainer including a plurality of separators is provided at the tip of a fuel nozzle. When the flame trap is provided at the front end of the fuel nozzle, the end surface of the flame trap facing toward the inner side of the flame receives radiant heat from the furnace, and the temperature of the flame trap tends to rise. [0003] When the burner is burning, the particles in the fuel are used to reduce the radiation from the furnace to the end face of the flame holder, but when the burner is extinguished, the fuel is not injected to the side of the furnace, so the radiation from the furnace has a great impact on the flame holder The influence of the end face will increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00
CPCF23D1/00
Inventor 葛西润松本启吾
Owner MITSUBISHI POWER LTD