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Methane rotational flow premixing nozzle device

A premixing nozzle and biogas technology, applied in the direction of combustion methods, combustion chambers, combustion equipment, etc., can solve problems such as difficulty in achieving uniformity, defects in premixing effects, lack of convective impact of gas and air, etc., to achieve easy maintenance, Easy maintenance and compact structure

Inactive Publication Date: 2017-03-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology lacks obvious convective impact between gas and air, and the effect of premixing is defective, making it difficult to achieve ideal uniformity

Method used

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  • Methane rotational flow premixing nozzle device
  • Methane rotational flow premixing nozzle device
  • Methane rotational flow premixing nozzle device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 and figure 2 As shown, this embodiment includes: a mixing tube 1, a biogas tube 2, a gas fitting 3 and a connecting accessory 4, wherein: the top of the mixing tube 1 is welded to the bottom of the biogas tube 2, and the top of the biogas tube 2 is welded to the bottom of the connecting accessory 4 , The gas distribution part 3 is installed between the mixing pipe 1 and the biogas pipe 2.

[0044] The structure of the mixing tube 1 is as image 3 As shown, its length is 4 times of the outer diameter of the mixing tube, and its thickness is 0.06 times of the outer diameter; there are two rows of 8 air holes on it, and the hole diameter is 0.25 times of the outer diameter; each row of two adjacent air holes The angle between the axes is 90°, and the distance between the axis and the axis of the mixing tube is 0.29 times the outer diameter; the angle between the axes of two adjacent air holes in the upper and lower rows is 45°, and the distance between the...

Embodiment 2

[0055] A biogas swirl premixing nozzle device, including a mixing tube, a biogas tube, an air distribution piece and connecting accessories. The mixing tube is located below the nozzle, and 6 air holes are opened on the upper part, the top is welded to the bottom of the biogas pipe, and the gas distribution piece is opened There are 8 biogas holes, which are installed between the mixing pipe and the biogas pipe. The connecting accessories are located at the top and welded to the top of the biogas pipe.

[0056] Next, we will further explain the composition of each component: the air holes are divided into upper and lower rows, each row has 3 air holes, and the angle between the axes of two adjacent air holes in each row is 120°; The angle between the axis of each air hole is 60°. The axis of the air hole is perpendicular to the axis of the mixing tube to ensure that the air hole is tangent to the inner wall of the mixing tube, the distance between the axes is 0.04d, and the di...

Embodiment 3

[0058] A biogas swirl premixing nozzle device, including a mixing tube, a biogas tube, gas distribution parts and connecting accessories, the mixing tube is located below the nozzle, and 12 air holes are opened on the upper part, the top is welded to the bottom of the biogas tube, and the gas distribution part is opened There are 16 biogas holes, which are installed between the mixing pipe and the biogas pipe. The connecting accessories are located at the top and welded to the top of the biogas pipe.

[0059] Next, we will further explain the composition of each component: the air holes are divided into upper and lower rows, each row has 6 air holes, and the angle between the axes of two adjacent air holes in each row is 60°; The angle between the axis of each air hole is 30°. The axis of the air hole is perpendicular to the axis of the mixing tube to ensure that the air hole is tangent to the inner wall of the mixing tube, the distance between the axes is 0.29d, and the diame...

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Abstract

The invention relates to a methane rotational flow premixing nozzle device. The methane rotational flow premixing nozzle device comprises a mixing pipe, a methane pipe, a gas distribution part and a connecting attachment. The mixing pipe is located under a nozzle. 2n air holes are formed in the upper portion of the mixing pipe. The top of the mixing pipe is welded to the bottom of the methane pipe. The gas distribution part is provided with N methane holes and mounted between the mixing pipe and the methane pipe. The connecting attachment is located in the uppermost position and welded to the top of the methane pipe. Compared with the prior art, the rotational flow effect can be achieved, the contact range of air and methane flow is increased, and thus the purpose of fully mixing and evenly distributing the methane and air is achieved.

Description

technical field [0001] The invention relates to a micro gas turbine combustion device in the field of distributed energy supply, in particular to a biogas swirl premixing nozzle device for a micro gas turbine. Background technique [0002] The nozzle is an important part of the micro gas turbine combustion equipment. With the development of distributed energy supply technology, micro gas turbines have been widely used in industry. Combustion efficiency and exhaust emissions are important indicators to measure the performance of micro gas turbines, and the structure of the nozzle directly affects these performance indicators, so the nozzle equipment has been widely valued by people. At present, the nozzles widely used in the industry are mostly multi-layer annular pipe structures or other complex structures to achieve uniform mixing of gas and air. [0003] After searching the existing literature, it is found that the Chinese patent application number 201420562304.2 disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/12F23R3/28
CPCF23R3/12F23R3/286F23R2900/03343
Inventor 王玉璋翁一武刘闳钊翁史烈
Owner SHANGHAI JIAO TONG UNIV
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