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Uniflow differential pressure type plasma ignition nozzle

A technology of plasma ignition and downstream pressure, applied in combustion ignition, incandescent ignition, combustion method and other directions, can solve the problems of high power requirements, engine deflagration easily, affecting ignition stability, etc., to achieve wide applicability, ignition The effect of strong reliability and ignition stability

Inactive Publication Date: 2012-09-19
HARBIN ENG UNIV
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Problems solved by technology

The above-mentioned ignition nozzles have corresponding disadvantages due to the working method: the indirect plasma arc ignition nozzle adopts an indirect ignition method, that is, a small burner with an oil and gas distribution system is first ignited with a plasma arc, and then the flame in the small burner Then ignite the main flame, its disadvantage is that carbon deposits will occur at the nozzle, which will affect the stability of ignition; the high-energy EDM direct ignition nozzle uses high-energy pulses to spray electric sparks into the oil-gas mixture, and its disadvantage is that the delay time is longer, Deflagration is prone to occur when the engine is started; the plasma ignition nozzle of the power station boiler uses an electromagnetic coil to pull the plasma arc out of the nozzle, and its disadvantage is that it requires a large space and requires a high power supply

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  • Uniflow differential pressure type plasma ignition nozzle
  • Uniflow differential pressure type plasma ignition nozzle
  • Uniflow differential pressure type plasma ignition nozzle

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Embodiment Construction

[0014] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0015] combine Figure 1~2 , The dual-fuel nozzle designed by the invention is mainly composed of cathode 1, anode 4, thread 2, hexagonal mounting seat 3, cathode head 5, nozzle hole 6, air inlet 7, electric nozzle cavity 8 and other components. When the downstream differential pressure plasma ignition nozzle shown in the present invention starts to work, the air enters the electric nozzle cavity 8 from the air inlet 7, and then moves near the spray hole 6 due to the internal and external pressure difference. Then the air is ionized into an ion state between the cathode head 5 and the nozzle hole 6, and is ejected from the nozzle hole 5 at a higher speed and a higher temperature, so that the high-temperature, high-speed plasma arc can fully interact with the fuel - The air mixture contacts and ignites the fuel-air mixture rapidly, thus ensuring the effective work...

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Abstract

The invention aims to provide a uniflow differential pressure type plasma ignition nozzlewhich comprises a cathode and an anode, wherein the cathode is mounted in the anode; the cathode and the anode form an inner cavity of a sparking plug; the anode is provided with an air inlet along the circumferential direction; and an injection hole is arranged on the position of the end part of the anode corresponding to the head part of the cathode. According to the invention, the plasma ignition nozzle has the advantages of small flow loss and local loss, high ignition success rate, strong ignition stability, short delay time, simple structure, strong ignition reliability, and relatively low demands on power supply power and the space size in a combustion chamber; in addition, the plasma ignition nozzle is also used for igniting liquid fuel and gaseous fuel and has wide applicability.

Description

technical field [0001] The invention relates to a gas turbine and a boiler, in particular to an igniter for the gas turbine and the boiler. Background technique [0002] A gas turbine is a typical conventional fuel power plant. It has the characteristics of small size, high power, light weight and fast start-up, and is widely used in core industrial fields such as aviation, electric power, ships and natural gas transmission. As a traditional burner, boilers are also widely used in many industrial occasions such as thermal power plants. [0003] Judging from the current technology, the main ignition equipment for gas turbines and boilers are high-energy electric spark discharge igniters, plasma indirect igniters, and plasma igniters for power plant boilers. The above-mentioned ignition nozzles have corresponding disadvantages due to the working method: the indirect plasma arc ignition nozzle adopts an indirect ignition method, that is, a small burner with an oil and gas dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q7/00
Inventor 张智博郑洪涛李雅军杨家龙李智明杨仁杨洪磊
Owner HARBIN ENG UNIV
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