CN213713128U - Premixing fuel injection mechanism of gas turbine - Google Patents

Abstract

The utility model relates to a premixing fuel injection mechanism of a gas turbine, which comprises a shell and an injection pipe, wherein a fixed pipe is fixedly connected in the shell and is of a spiral structure, one end of the fixed pipe is fixedly connected with a first input pipe, the first input pipe is fixedly connected with a gas emission pipe after passing through the shell, and the gas emission pipe is connected with a gas source; the oxygen-enriched air can be separated from the air through the oxygen-enriched separator and mixed with the fuel gas, so that a large amount of nitrogen oxides generated by combustion of the fuel gas are avoided, and the environment is protected; the fixed pipe through helical structure can be comparatively complete with gas and oxygen-enriched air mixture, and the air that gets into in the fixed pipe and the through-hole that the oxygen-enriched air passes through on the fixed plate flow, has slowed down the flow velocity of oxygen-enriched air and gas, lets gas and oxygen-enriched air mixture comparatively even, does benefit to the burning of gas.

Description

Premixing fuel injection mechanism of gas turbine

Technical Field

The utility model relates to a gas turbine technical field specifically is a gas turbine's fuel injection mechanism that mixes in advance.

Background

The gas turbine is an internal combustion type power machine which takes continuously flowing gas as a working medium to drive an impeller to rotate at a high speed and converts the energy of fuel into useful work, and is a rotary impeller type heat engine; the working process of the gas turbine is that the compressor continuously sucks air from the atmosphere and compresses the air; the compressed air enters a combustion chamber, is mixed with the injected fuel and then is combusted to form high-temperature gas, and then flows into a gas turbine to expand and do work to push a turbine impeller to drive a compressor impeller to rotate together; the work-doing capability of the heated high-temperature gas is obviously improved, so that the gas turbine still has residual work as the output mechanical work of the gas turbine while driving the compressor; when the gas turbine is started from a static state, the gas turbine needs to be driven by a starter to rotate, and the starter is disconnected after the gas turbine is accelerated to be capable of operating independently;

therefore, in the thermodynamic cycle of the gas turbine, the higher the gas temperature in the combustion chamber is, the more beneficial to the improvement of efficiency and power is, but the gas compressor continuously sucks air from the atmosphere, the air contains a large amount of nitrogen, so that the gas is not beneficial to full combustion, and excessive air easily forms oxynitride at high temperature, so that the environment is polluted;

in view of the above, the present application provides a premixed fuel injection mechanism for a gas turbine to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas turbine's fuel injection mechanism in advance to solve the problem that proposes in the above-mentioned background art, the utility model discloses convenient to use, easy operation, systematic height, the practicality is strong.

In order to achieve the above object, the utility model provides a following technical scheme: a premixing fuel injection mechanism of a gas turbine comprises a shell and an injection pipe, wherein a fixed pipe is fixedly connected in the shell and is of a spiral structure, one end of the fixed pipe is fixedly connected with a first input pipe, the first input pipe penetrates through the shell and is fixedly connected with a gas emission pipe, and the gas emission pipe is connected with a gas source; the other end of the fixed pipe is fixedly connected with an injection pipe, and the injection pipe penetrates through the shell and is fixedly connected with an internal gas nozzle of the gas turbine; one side of the fixed pipe is fixedly connected with a second input pipe, the second input pipe penetrates through the shell and then is fixedly connected with the pipeline, the pipeline is fixedly connected with an output port of the compressor, and an input port of the compressor is connected with an output port of the air blower through the pipeline.

Preferably, the system also comprises an oxygen-enriched membrane separator, wherein the oxygen-enriched membrane separator is positioned in a pipeline between the blower and the compressor, an input port of the oxygen-enriched membrane separator is fixedly connected with an output port of the blower through the pipeline, and an output port of the oxygen-enriched membrane separator is fixedly connected with an input port of the compressor through the pipeline.

Preferably, still include the fixed plate, still fixedly connected with fixed plate in the fixed tube, just a plurality of through-hole has evenly been seted up on the fixed plate.

Preferably, the first input pipe is fixedly connected with the gas emission pipe through a connecting flange.

Preferably, the shell is of a circular cavity structure.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages that through the mutual matching of the gas emission pipe, the first input pipe, the shell, the injection pipe and the second input pipe, the oxygen-enriched air can be separated from the air by the oxygen-enriched separator and mixed with the gas, thereby avoiding the generation of a large amount of nitrogen oxides by the combustion of the gas and protecting the environment; the fixed pipe through helical structure can be comparatively complete with gas and oxygen-enriched air mixture, and the air that gets into in the fixed pipe and the through-hole that the oxygen-enriched air passes through on the fixed plate flow, has slowed down the flow velocity of oxygen-enriched air and gas, lets gas and oxygen-enriched air mixture comparatively even, does benefit to the burning of gas.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic front view of a cross-sectional structure of the middle housing of the present invention;

FIG. 3 is a schematic top view of the fixing tube of the present invention;

fig. 4 is a schematic view of the structure of the middle fixing plate of the present invention.

Reference numerals: 1. a gas emitting tube; 2. a first input pipe; 3. a housing; 4. an injection pipe; 5. a second input pipe; 6. a pipeline; 7. a compressor; 8. an oxygen-enriched membrane separator; 9. a blower; 10. a fixed tube; 11. a fixing plate; 12. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a premixing fuel injection mechanism of a gas turbine comprises a shell 3 and an injection pipe 4, wherein a fixed pipe 10 is fixedly connected in the shell 3, the fixed pipe 10 is of a spiral structure, one end of the fixed pipe 10 is fixedly connected with a first input pipe 2, the first input pipe 2 penetrates through the shell 3 and then is fixedly connected with a gas emission pipe 1, and the gas emission pipe 1 is connected with a gas source; the other end of the fixed pipe 10 is fixedly connected with an injection pipe 4, and the injection pipe 4 penetrates through the shell 3 and then is fixedly connected with an internal gas nozzle of the gas turbine; a second input pipe 5 is fixedly connected to one side of the fixed pipe 10, the second input pipe 5 penetrates through the shell 3 and then is fixedly connected with a pipeline 6, the pipeline 6 is fixedly connected with an output port of a compressor 7, and an input port of the compressor 7 is connected with an output port of an air blower 9 through the pipeline 6;

wherein, the injection pipe 4 is used for injecting the fuel gas of the fuel gas source into the fixed pipe 10;

wherein, the compressor 7 is used for pressurizing air;

the device is characterized by further comprising an oxygen-enriched membrane separator 8, wherein the oxygen-enriched membrane separator 8 is located in the pipeline 6 between the blower 9 and the compressor 7, an input port of the oxygen-enriched membrane separator 8 is fixedly connected with an output port of the blower 9 through the pipeline 6, and an output port of the oxygen-enriched membrane separator 8 is fixedly connected with an input port of the compressor 7 through the pipeline 6;

wherein, the blower 9 sucks the air into the oxygen-enriched membrane separator 8, the oxygen-enriched membrane separator 8 is used for separating the air into oxygen-enriched air and nitrogen-enriched air, the oxygen-enriched air enters the compressor 7, enters the fixed pipe 10 after entering the compressor 7 for pressurization;

wherein, the fuel gas and the oxygen-enriched air are conveyed into the fixing pipe 10 with the spiral structure to play a role of mixing, so that the oxygen-enriched air is mixed with the fuel gas, and the fuel gas is fully combusted;

wherein the injection pipe 4 is used for injecting the gas and the oxygen-enriched air to a gas nozzle of the gas turbine;

the fixing pipe 10 is also internally and fixedly connected with a fixing plate 11, and the fixing plate 11 is uniformly provided with a plurality of through holes 12;

wherein, the fuel gas and the oxygen-enriched air flow through the through holes 12 on the fixing plate 11, the movement speed is reduced, and the fuel gas and the oxygen-enriched air are uniformly mixed;

the first input pipe 2 is fixedly connected with the gas emission pipe 1 through a connecting flange;

the shell 3 is of a circular cavity structure;

the working principle is as follows: when the device is used, firstly, the fuel gas emission pipe 1 transmits fuel gas of a fuel gas source into the fixed pipe 10, meanwhile, the blower 9 pumps air into the oxygen-enriched membrane separator 8, the oxygen-enriched membrane separator 8 is used for separating the air into oxygen-enriched air and nitrogen-enriched air, the oxygen-enriched air enters the compressor 7 and enters the fixed pipe 10 after being pressurized by the compressor 7, and therefore the oxygen-enriched air and the fuel gas are mixed; the spiral fixing pipe 10 can lead the fuel gas and the oxygen-enriched air to flow for a longer time and lead the oxygen-enriched air and the fuel gas to be mixed more completely; the air and the oxygen-enriched air entering the fixing pipe 10 flow through the through holes 12 on the fixing plate 11, so that the flow speed of the oxygen-enriched air and the fuel gas is reduced, and the fuel gas and the oxygen-enriched air are uniformly mixed; therefore, the device can completely mix the fuel gas and the oxygen-enriched air through the fixing pipe 10 with the spiral structure, the combustion of the fuel gas is facilitated, the oxygen-enriched air can be separated from the air through the oxygen-enriched separator and mixed with the fuel gas, the fuel gas combustion is prevented from generating a large amount of nitrogen oxides, and the environment is protected.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A premixed fuel injection mechanism for a gas turbine, characterized by: the gas injection device comprises a shell (3) and an injection pipe (4), wherein a fixed pipe (10) is fixedly connected in the shell (3), the fixed pipe (10) is of a spiral structure, one end of the fixed pipe (10) is fixedly connected with a first input pipe (2), the first input pipe (2) penetrates through the shell (3) and then is fixedly connected with a gas emission pipe (1), and the gas emission pipe (1) is connected with a gas source; the other end of the fixed pipe (10) is fixedly connected with an injection pipe (4), and the injection pipe (4) penetrates through the shell (3) and then is fixedly connected with an internal gas nozzle of the gas turbine;

one side of fixed pipe (10) is fixedly connected with second input pipe (5) still, just second input pipe (5) pass behind casing (3) with pipeline (6) fixed connection, just pipeline (6) and compressor (7)'s delivery outlet fixed connection, the delivery outlet that the input port of compressor (7) passes through pipeline (6) and air-blower (9) is connected.

2. The premixed fuel injection mechanism of a gas turbine according to claim 1, wherein: the device is characterized by further comprising an oxygen-enriched membrane separator (8), wherein the oxygen-enriched membrane separator (8) is located in a pipeline (6) between the blower (9) and the compressor (7), an input port of the oxygen-enriched membrane separator (8) is fixedly connected with an output port of the blower (9) through the pipeline (6), and an output port of the oxygen-enriched membrane separator (8) is fixedly connected with an input port of the compressor (7) through the pipeline (6).

3. The premixed fuel injection mechanism of a gas turbine according to claim 1, wherein: still include fixed plate (11), still fixedly connected with fixed plate (11) in fixed pipe (10), just a plurality of through-hole (12) have evenly been seted up on fixed plate (11).

4. The premixed fuel injection mechanism of a gas turbine according to claim 1, wherein: the first input pipe (2) is fixedly connected with the gas emission pipe (1) through a connecting flange.

5. The premixed fuel injection mechanism of a gas turbine according to claim 1, wherein: the shell (3) is of a circular cavity structure.

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