Double-flap swirl-type dual-fuel nozzle used for chemical regenerative cycle

A chemical reheat cycle and swirling technology, which is applied in combustion chambers, combustion methods, combustion equipment, etc., can solve the problems of deteriorating working environment of gas turbine blades, poor uniformity of outlet temperature field, and poor mixing effect , to achieve the effect of improving combustion efficiency, shortening combustion flame and strengthening combustion

Inactive Publication Date: 2014-07-23
三亚哈尔滨工程大学南海创新发展基地
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Problems solved by technology

During operation, the cracked gas flow rate is usually greater than the fuel flow rate, and the flow rate is too large, which will cause poor mixing effect with air, which will easily lead to reduced combustion efficiency, flame elongation, and poor outlet temperature field uniformity, which will deteriorate the gas turbine turbine. The working environment of the blade

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  • Double-flap swirl-type dual-fuel nozzle used for chemical regenerative cycle
  • Double-flap swirl-type dual-fuel nozzle used for chemical regenerative cycle
  • Double-flap swirl-type dual-fuel nozzle used for chemical regenerative cycle

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Embodiment Construction

[0017] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0018] combine Figure 1~4 , the double-lobe swirl type dual-fuel nozzle 1 designed for the chemical reheating cycle mainly includes two parts, the oil circuit 2 and the gas circuit 3, wherein the oil circuit 2 includes the auxiliary oil circuit swirler 4, the auxiliary oil circuit channel 5 And the main oil passage 6; the air passage 3 includes two petal swirl chambers 7, the air inlet passage 8 formed by the outer wall of the air passage 9 and the outer wall of the main oil passage 6, and 4 rows of oblique jet holes 10. The gas path adopts a double-lobe swirl chamber 7, and the oil pipe is installed in the middle of the gas path 3. The air flow enters the double-lobe swirl chamber through the channel between the oil pipe and the gas pipe wall, and the gas fuel passes through 4 rows, a total of 28 The oblique hole 10 is ejected, and the liquid fuel is injected i...

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Abstract

The invention aims to provide a double-flap swirl-type dual-fuel nozzle used for a chemical regenerative cycle. The double-flap swirl-type dual-fuel nozzle comprises an auxiliary oil-path channel wall, a main oil-path channel wall, a gas-path outer wall and an oil-path spout. An auxiliary oil-path channel is formed inside the auxiliary oil-path channel wall, and an auxiliary oil-path swirler is arranged at the end of the auxiliary oil-path channel wall and communicated with the oil-path spout. The main oil-path channel wall is arranged outside the auxiliary oil-path channel wall, and a main oil-path channel is formed between the main oil-path channel wall and the auxiliary oil-path channel wall and communicated with the oil-path spout. The gas-path outer wall is arranged outside the main oil-path channel wall, and a gas-path channel is formed between the gas-path outer wall and the main oil-path channel wall. Flap type swirl cavities are formed in the end, located on the oil-path spout, of the gas-path outer wall, and gas injection holes are formed in the end faces of the flap type swirl cavities and communicated with the gas-path channel. According to the double-flap swirl-type dual-fuel nozzle, the flow speed is decreased, the swirl speed is pre-increased, and mixing of gas fuel and air is enhanced. When liquid fuel is combusted independently, water vapor reinjection can also be conducted through a gas path, and NOx emission is reduced.

Description

technical field [0001] The invention relates to a gas turbine, in particular to a nozzle of the gas turbine. Background technique [0002] Gas turbines are widely used in aviation, shipping, electric power, petroleum and many other industrial fields due to their advantages such as simple structure, high single-unit power, small weight and size, and good maneuverability. Therefore, the technical transformation and performance optimization of conventional gas turbine application technology has become an important topic to solve the energy crisis and environmental pollution problems. Chemical regenerative cycle is an advanced cycle method of gas turbines. It uses the waste heat of high-temperature exhaust gas emitted by gas turbines to catalytically crack diesel oil. The cracked gas generated contains light fuel gases such as hydrogen, carbon monoxide, and methane that are easier to burn. The generated cracked gas is re-injected into the combustion chamber, making the combusti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/38
Inventor 陈曦郑洪涛潘刚潘福敏张智博刘倩
Owner 三亚哈尔滨工程大学南海创新发展基地
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