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Combustion nozzle and coal gasification furnace

A combustion nozzle and gas-supporting technology, applied in the direction of burner, combustion method, combustion type, etc., can solve the problems of coolant outflow, influence on combustion, and uneven stress, so as to reduce possibility, improve life and reliability, The effect of optimizing the structure

Active Publication Date: 2013-09-11
KEDA MAS CLEAN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The ribs and the wall of the cooling chamber are connected by knuckles. Whether it is integrally formed or welded, the knuckle structure has the problem that the temperature at the knuckle connection is different from other positions, and the stress is uneven, so it is easy to crack and damage
Once the cooling cavity of the rib structure is damaged, it is difficult to repair, and the end of the nozzle needs to be replaced as a whole
The rib structure cooling cavity has poor sealing and low reliability. After the rib cracks and damages, it will not be able to guide the flow of coolant, and even cause the coolant to flow out of the nozzle, affecting combustion

Method used

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  • Combustion nozzle and coal gasification furnace
  • Combustion nozzle and coal gasification furnace
  • Combustion nozzle and coal gasification furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Figure 2A It is a schematic structural diagram of the combustion nozzle provided by Embodiment 1 of the present invention, Figure 2B for Figure 2A The schematic cross-sectional structure diagram along the A-A line, the combustion nozzle includes a nozzle housing 10, the nozzle housing 10 is provided with a fuel passage 20, a combustion gas passage 30 and a cooling passage 40, and the front end of the nozzle housing 10 is provided with a cooling chamber 50, Wherein, a helical pipeline 60 communicating with the cooling channel 40 is embedded in the cooling chamber 50 to form a helical cooling channel.

[0038] This embodiment is a preferred structure of the combustion nozzle. The fuel channel 20 is arranged along the longitudinal central axis of the nozzle housing 10, the gas-supporting channel 30 surrounds the outside of the fuel channel 20, and the cooling channel 40 can be arranged on the outside of the gas-supporting channel 30. . And, it is preferable that the ...

Embodiment 2

[0045] Figure 3A Schematic diagram of the structure of the combustion nozzle provided by Embodiment 2 of the present invention, Figure 3B for Figure 3A Schematic diagram of the cross-sectional structure along the B-B line, Figure 3C for Figure 3A Schematic diagram of the cross-sectional structure along line C-C. The difference between this embodiment and Embodiment 1 is that there are two cooling passages 40 provided in the casing 10, one of which communicates with the helical pipeline 60, and the other cooling passage 40 communicates with the other than the helical pipeline 60. The cooling cavity 50 communicates, such as Figure 3A , 3B and 3C are respectively provided with the inlet and outlet of two cooling passages 40 . Cooling passages 40 each including supply and return passages are provided on both sides of the housing 10 , respectively.

[0046] In this embodiment, the cooling cavity is separated into two spiral cooling channels by the spiral pipeline, and ...

Embodiment 3

[0049] Figure 4 The partial structural diagram of the combustion nozzle provided by Embodiment 3 of the present invention. This embodiment can be based on the above-mentioned technical solutions, and grooves 51 are formed on one or both end faces of the cooling chamber 50, usually formed on the nozzle shell On the front wall surface of the body 10 and the cover 70 , the shape of the groove 51 matches the shape of the helical pipeline, and the helical pipeline is buckled and fixed in the cooling cavity 50 .

[0050] The method of fixing the spiral pipeline provided in this embodiment can further reduce the point-shaped or linear connection between the spiral pipeline and the shell wall, increase the contact area between the spiral pipeline and the shell, and can not only improve heat conduction and cooling performance, and can avoid damage and fracture of the rigid joint due to uneven stress.

[0051] In addition, since the above-mentioned implementations use independent pipe...

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Abstract

The invention discloses a combustion nozzle and a coal gasification furnace. The combustion nozzle comprises a nozzle body; a fuel channel, a combustion-supporting air channel and a cooling channel are arranged in the nozzle body; and the front end of the nozzle body is provided with a cooling cavity, wherein a spiral pipeline communicated with the cooling channel is embedded in the cooling cavity to form a spiral cooling runner. In the combustion nozzle and the coal gasification furnace, the spiral pipeline is embedded in the cooling cavity to form the spiral cooling runner, so the spiral cooling runner is an independent pipeline and unnecessarily in bevel connection with a wall surface of the nozzle body, and phenomenon that the cooling cavity is cracked due to big temperature difference between bevels, non-uniform stress and heat fatigue can be eliminated. By the technical scheme, the structure of the cooling cavity of the combustion nozzle is optimized, the damage probability due to metal fatigue is reduced, the service life of the combustion nozzle is prolonged, and the operation reliability of the combustion nozzle is improved.

Description

technical field [0001] The invention relates to a combustion equipment structure technology, in particular to a combustion nozzle and a coal gasifier. Background technique [0002] The combustion nozzle is a common combustion component, which is widely used in various combustion equipment, such as engines, boilers, coal gasifiers, etc. [0003] The typical structure of the combustion nozzle is as follows figure 1 As shown, the combustion nozzle has a substantially cylindrical casing 10, and the casing 10 is provided with a fuel passage 20 and a gas-supporting passage 30, and the fuel passing through the fuel passage 20 and the supporting gas passing through the gas-supporting passage 30 pass through the nozzle. The ends are mixed and ignited to form a flame. Combustion nozzles can be divided into three types according to the composition of the gas-supporting gas: air-supporting, oxygen-enriched and pure oxygen-supporting. The oxygen content of the combustion-supporting ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/58F23D14/76
Inventor 武桢
Owner KEDA MAS CLEAN ENERGY
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