High-efficiency low-nitrogen combustion gas turbine combustion chamber structure

Abstract

The utility model discloses an efficient low-nitrogen combustion gas turbine combustion chamber structure which comprises a flame tube and a shell, the flame tube is of a tube structure with one end open, the shell is of a tube structure with one end open, and the open end of the shell is detachably provided with an exhaust end cover. The flame tube is coaxially arranged in the shell, and the opening ends are arranged on the same side; a turbulent flow protruding block is spirally arranged on the inner wall of the flame tube, a gas nozzle is installed at the closed end of the flame tube, the gas outlet end of the gas nozzle extends into the flame tube, and the gas inlet end of the gas nozzle penetrates through the shell and extends to the outside. An air preheating pipe is wound on the outer side of the flame tube, one end of the air preheating pipe is connected with an air inlet assembly, and the other end penetrates through the shell and extends to the outside. The turbulent flow protruding blocks are arranged on the inner wall of the flame tube, so that air and fuel gas conveyed into the flame tube can be driven to spirally flow, the air and the fuel gas are fully mixed, fuel in a local area is prevented from being excessively concentrated, and fuel gas combustion sufficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas turbine technical field, concretely is a kind of high-efficiency low-nitrogen combustion's gas turbine combustion chamber structure. BACKGROUND

[0002] As a kind of chemical energy conversion into mechanical energy of fuel, gas turbine is widely used in power generation, aviation, ship and other fields.In the operation process of gas turbine, combustion chamber is the key component to realize fuel combustion and release energy, and its structure design directly affects the combustion efficiency and pollutant emission level of gas turbine.

[0003] Traditional gas turbine combustion chamber has obvious drawbacks in actual operation.On the one hand, due to the mixing efficiency of airflow and fuel is not high because of the structure of combustion chamber, so that fuel and air cannot be mixed in time, which leads to incomplete combustion of part of fuel, causing energy waste, and also reduces the overall performance of gas turbine.On the other hand, fuel is unevenly distributed in the combustion chamber, fuel is too concentrated in local area, while air is excessive in other areas, which seriously affects the completeness of combustion, and also easily causes local overheating, shortens the service life of combustion chamber components, increases equipment maintenance cost and downtime.With the increasing demand for energy and the increasingly stringent environmental standards, a gas turbine combustion chamber that can improve combustion efficiency is needed. SUMMARY

[0004] The utility model aims at providing a kind of high-efficiency low-nitrogen combustion's gas turbine combustion chamber structure, solve the problem of insufficient combustion caused by uneven fuel distribution and poor mixing state of existing combustion chamber, so as to improve combustion efficiency and reduce pollutant emission.

[0005] The utility model is realized as follows: a kind of high-efficiency low-nitrogen combustion's gas turbine combustion chamber structure, including flame tube, the flame tube is the open-ended cylinder structure, further including shell, the shell is the open-ended cylinder structure, the open end of the shell is detachably installed with exhaust end cover;The flame tube is coaxially arranged in shell, and the open end is arranged on the same side;Spiral turbulence boss is arranged on the inner wall of the flame tube, and the closed end is provided with gas nozzle, the gas outlet end of the gas nozzle is extended and arranged in the flame tube, and the gas inlet end extends to the outside through the shell;Air preheating pipe is wound on the outside of the flame tube, one end of the air preheating pipe is connected with air inlet assembly, and the other end extends to the outside through the shell.

[0006] Preferably, the open end of the shell is provided with a first connecting flange, one end of the exhaust end cover connected with the shell is provided with a second connecting flange, the second connecting flange is sequentially provided with a second mounting bolt along the circumferential direction thereof, and the second connecting flange is connected with the first connecting flange through the second mounting bolt.

[0007] Preferably, the flame tube comprises mounting seats, a plurality of mounting seats are sequentially arranged along the circumferential direction of the outer ring surface of the flame tube at both ends thereof, the shell is provided with a corresponding first mounting bolt corresponding to the position of each mounting seat, and the first mounting bolt is mounted on the corresponding mounting seat.

[0008] Preferably, the closed end of the flame tube is provided with a nozzle mounting port, and the gas nozzle is detachably mounted on the nozzle mounting port.

[0009] Preferably, the nozzle mounting port is provided with a third connecting flange, the gas nozzle is provided with a fourth connecting flange, a plurality of third mounting bolts are sequentially arranged along the circumferential direction of the fourth connecting flange, and the fourth connecting flange is mounted on the third connecting flange through the third mounting bolts.

[0010] Preferably, the air inlet assembly comprises a main air pipe and a branch air pipe, the main air pipe is arranged at the air outlet end of the air inlet assembly and extends into the interior of the flame tube, the air outlet of the main air pipe is arranged beside the air outlet end of the gas nozzle, and the branch air pipe is arranged at the side of the main air pipe and extends to the middle position of the flame tube.

[0011] Preferably, the air preheating pipe is in a spiral structure and is arranged around the shell and the flame tube.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model discloses a turbulence protruding block arranged on the inner wall of the flame tube can drive the air and gas conveyed into the interior of the flame tube to flow spirally, thereby fully mixing the air and gas, avoiding that fuel is too concentrated in a local area, and effectively improving the fullness of gas combustion.

[0014] 2. The utility model discloses that the main air pipe is arranged at the position of the gas nozzle, air can be rapidly mixed with the gas sprayed out of the gas nozzle near the gas nozzle, thereby forming a local fuel-rich combustion area, and the branch air pipe is arranged at the middle position of the flame tube, thereby further mixing and combusting the product after fuel-rich combustion when the product flows through the middle position of the flame tube, and making combustion more full. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the sectional view structural schematic diagram of the utility model;

[0016] Figure 2 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Figure 3 It is the structure schematic diagram of the shell of the utility model;

[0018] Figure 4 is the installation structure schematic view of the flame tube and the air preheating pipe of the utility model;

[0019] Figure 5 is the installation structure schematic view of the flame tube and the gas nozzle of the utility model;

[0020] Figure 6 is the installation structure schematic view of the flame tube and the gas nozzle of the utility model from another perspective.

[0021] In the figure: 1, shell;101, first mounting bolt;102, first connecting flange;2, exhaust end cover;201, second connecting flange;202, second mounting bolt;3, flame tube;301, spoiler boss;302, mounting seat;303, nozzle mounting port;304, third connecting flange;4, air preheating pipe;5, air intake assembly;501, main gas pipe;502, branch gas pipe;6, gas nozzle;601, fourth connecting flange;602, third mounting bolt. DETAILED DESCRIPTION

[0022] In the utility model, unless another explicit provision and limitation, the terms such as " install " " connect " " connect " " fixed " and so on should be broad-sense understanding, for example, can be fixed connection, can also be detachable connection, or integrated;Can be mechanical connection, can also be electrical connection;It can be directly connected, can also be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0023] The following is further illustrated in conjunction with the specific embodiments and the drawings: Example 1

[0024] As Figures 1-3 And Figure 5As shown, a kind of high-efficiency low-nitrogen combustion gas turbine combustion chamber structure, including flame tube 3, flame tube 3 is the cylinder structure of one end opening, still including shell 1, shell 1 is the cylinder structure of one end opening, and the open end of shell 1 can be detachably installed with exhaust end cover 2;The open end of shell 1 is provided with first connecting flange 102, and the end of exhaust end cover 2 and shell 1 is provided with second connecting flange 201, and second connecting flange 201 is sequentially provided with second mounting bolt 202 along its circumferential direction, and second connecting flange 201 is connected by second mounting bolt 202 and first connecting flange 102.Sealing gasket resistant to oil, resistant to high temperature is arranged between first connecting flange 102 and second connecting flange 201, to prevent leakage at the connecting portion.Flame tube 3 is coaxially arranged in shell 1, and is arranged at the same side with open end;Flame tube 3 includes mounting seat 302, and the outer ring surface of flame tube 3 is sequentially provided with a plurality of mounting seats 302 along its circumferential direction, and mounting seat 302 is fixed by welding, and argon arc welding is used in welding process, to ensure the sealing property and strength of welding portion.Shell 1 is provided with corresponding first mounting bolt 101 at the position corresponding to each mounting seat 302, and first mounting bolt 101 is installed on corresponding mounting seat 302.Shell 1 is also provided with high-temperature-resistant sealing gasket at the position of first mounting bolt 101, to prevent internal air leakage, leading to gas leakage.

[0025] As Figure 1 And Figures 4-6As shown, the inner wall of the flame tube 3 is spirally provided with turbulence bumps 301, which are integrally formed with the inner wall of the flame tube 3. In the manufacturing of the flame tube 3, the turbulence bumps 301 are formed in a spiral shape on the inner wall by precision casting or mechanical processing. The integrally formed structure ensures the connection strength between the turbulence bumps 301 and the flame tube 3, avoids falling off or loosening under high-temperature and high-speed airflow impact, and reduces the resistance of the airflow at the connection, so that the airflow can pass more smoothly. The closed end is provided with a gas nozzle 6, the gas outlet end of the gas nozzle 6 extends into the flame tube 3, and the gas inlet end extends to the outside through the shell 1; the closed end of the flame tube 3 is provided with a nozzle mounting port 303, and the gas nozzle 6 is detachably mounted on the nozzle mounting port 303. The end of the gas nozzle is uniformly provided with a plurality of injection holes, and the hole diameter of the injection hole gradually decreases from the center to the edge. This design can make the gas injection more uniform and mix better with air. The closed end provided with the gas nozzle 6 is also provided with an ignition device, which is close to the gas nozzle 6 and is fixed on the flame tube 3 by bolts, and is used for igniting the mixed gas of gas and air. The third connecting flange 304 is arranged on the nozzle mounting port 303, the fourth connecting flange 601 is arranged on the gas nozzle 6, a plurality of third mounting bolts 602 are arranged on the fourth connecting flange 601 in the circumferential direction, and the fourth connecting flange 601 is mounted on the third connecting flange 304 through the third mounting bolts 602. A high-temperature-resistant and oil-resistant sealing washer is arranged between the third connecting flange 304 and the fourth connecting flange 601 to prevent fuel leakage. At the same time, the fuel nozzle is connected with the external fuel conveying pipeline through the existing pipeline connection quick connector, which is convenient for the installation, disassembly and maintenance of the fuel pipeline. The air preheating pipe 4 is spirally arranged on the outside of the flame tube 3, and the air preheating pipe 4 is a spiral structure and is arranged around the shell 1 and the flame tube 3. One end of the air preheating pipe 4 is connected with the air inlet assembly 5, and the other end extends to the outside through the shell 1. The air inlet assembly 5 includes a main gas pipe 501 and a branch gas pipe 502; the air outlet end of the air inlet assembly 5 extends into the flame tube 3 and is provided with the main gas pipe 501, and the air outlet of the main gas pipe 501 is arranged beside the air outlet end of the gas nozzle 6; the side of the main gas pipe 501 extends and is provided with the branch gas pipe 502, and the air outlet of the branch gas pipe 502 extends to the middle position of the flame tube 3. Example 2

[0026] As Figures 1-3 and Figure 5As shown in the drawings, a high-efficiency low-nitrogen combustion gas turbine combustion chamber structure includes a flame tube 3, which is an open-ended cylindrical structure, and an outer shell 1, which is also an open-ended cylindrical structure. The open end of the outer shell 1 is detachably mounted with an exhaust end cover 2. The open end of the outer shell 1 is provided with a first connecting flange 102, and the end of the exhaust end cover 2 connected to the outer shell 1 is provided with a second connecting flange 201. The second connecting flange 201 is provided with second mounting bolts 202 in the circumferential direction in sequence, and the second connecting flange 201 is connected to the first connecting flange 102 through the second mounting bolts 202. The flame tube 3 is coaxially arranged in the outer shell 1 and arranged on the same side of the open end. The flame tube 3 includes a mounting seat 302, and the outer ring surface of the flame tube 3 is provided with a plurality of mounting seats 302 in the circumferential direction in sequence at both ends. The outer shell 1 is provided with a corresponding first mounting bolt 101 corresponding to each mounting seat 302, and the first mounting bolt 101 is mounted on the corresponding mounting seat 302.

[0027] As shown in the drawings, Figure 1 and Figures 4-6 The inner wall of the flame tube 3 is spirally provided with a turbulence bump 301, and the closed end is provided with a gas nozzle 6. The gas nozzle 6 extends into the interior of the flame tube 3 at the gas outlet end, and extends to the outside through the outer shell 1 at the gas inlet end. The closed end of the flame tube 3 is provided with a nozzle mounting port 303, and the gas nozzle 6 is detachably mounted on the nozzle mounting port 303. The nozzle mounting port 303 is provided with a third connecting flange 304, and the gas nozzle 6 is provided with a fourth connecting flange 601. The fourth connecting flange 601 is provided with a plurality of third mounting bolts 602 in the circumferential direction in sequence, and the fourth connecting flange 601 is mounted on the third connecting flange 304 through the third mounting bolts 602. The outer side of the flame tube 3 is provided with an air preheating pipe 4, which is a spiral structure and is arranged around the outer shell 1 and the flame tube 3. One end of the air preheating pipe 4 is connected with an air inlet assembly 5, and the other end extends to the outside through the outer shell 1. The air inlet assembly 5 includes a main gas pipe 501 and a branch gas pipe 502. The air inlet assembly 5 extends to the interior of the flame tube 3 at the gas outlet end and is provided with the main gas pipe 501. The gas outlet of the main gas pipe 501 is arranged beside the gas outlet end of the gas nozzle 6. The side of the main gas pipe 501 extends to be provided with the branch gas pipe 502, and the gas outlet of the branch gas pipe 502 extends to be arranged at the middle position of the flame tube 3.

[0028] The working principle of the utility model is: in use, the gas is delivered into the flame cylinder 3 through the gas nozzle 6, and the air delivered by the air inlet assembly 5 is effectively enhanced through the turbulence bump 301 to enhance the mixing effect of the gas and the air, so as to realize high-efficiency combustion, and the main gas pipe 501 and the branch gas pipe 502 provided by the air inlet assembly 5 can supply air to different parts of the flame cylinder 3; when the product after fuel-rich combustion flows through the middle part of the flame cylinder 3, the air supplied by the branch gas pipe 502 can be further mixed and combusted, so that the combustion is more sufficient, and the air preheating pipe 4 is wound on the flame cylinder 3, so that the heat of the flame cylinder 3 can be used to preheat the air, preventing cold air from entering the flame cylinder 3 to reduce the combustion efficiency; so as to realize high-efficiency combustion.

[0029] In conclusion, the utility model discloses the turbulence bump 301 can drive the air and the gas delivered into the flame cylinder 3 to flow spirally, so as to mix them fully, avoid the fuel too concentrated in the local area, and effectively improve the fullness of the gas combustion; the main gas pipe 501 is arranged at the position of the gas nozzle 6, so that the air can be rapidly mixed with the gas sprayed by the gas nozzle near the gas nozzle 6, forming a local fuel-rich combustion area; the branch gas pipe 502 is arranged at the middle part of the flame cylinder 3, so that when the product after fuel-rich combustion flows through the middle part of the flame cylinder 3, it can be further mixed and combusted, so that the combustion is more sufficient.

[0030] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas turbine combustor structure for high-efficiency low-NOx combustion comprising a flame tube (3) which is a one-end-opened cylindrical structure, characterized in that, Also include the shell (1), the shell (1) is a one end open cylinder structure, the open end of the shell (1) is detachably mounted with exhaust end cover (2); The flame tube (3) is coaxially arranged in the shell (1), and the open end is arranged on the same side; The inner wall of the flame tube (3) is spirally provided with a spoiler bump (301), and the closed end is provided with a gas nozzle (6), the gas nozzle (6) extends into the flame tube (3), and the gas nozzle (6) extends into the flame tube (3). The gas inlet end extends to the outside through the shell (1); The outer side of the flame tube (3) is wound with an air preheating pipe (4), one end of the air preheating pipe (4) is connected with an air inlet assembly (5), and the other end extends to the outside through the shell (1).

2. A high-efficiency low-nitrogen combustion gas turbine combustor structure according to claim 1, characterized by The open end of the shell (1) is provided with a first connecting flange (102), and the end connected with the shell (1) of the exhaust end cover (2) is provided with a second connecting flange (201), and the second connecting flange (201) is sequentially provided with a second mounting bolt (202) along the circumferential direction thereof, and the second connecting flange (201) is connected with the first connecting flange (102) through the second mounting bolt (202).

3. A high-efficiency low-nitrogen combustion gas turbine combustor structure according to claim 1, characterized by The flame tube (3) comprises a mounting seat (302), and the outer ring surface of the flame tube (3) is sequentially provided with a plurality of mounting seats (302) at both ends along the circumferential direction thereof, and the shell (1) is provided with a corresponding first mounting bolt (101) corresponding to the position of each mounting seat (302), and the first mounting bolt (101) is mounted on the corresponding mounting seat (302).

4. A high-efficiency low-nitrogen combustion gas turbine combustor structure according to claim 1, characterized by The closed end of the flame tube (3) is provided with a nozzle mounting port (303), and the gas nozzle (6) is detachably mounted on the nozzle mounting port (303).

5. A high-efficiency low-nitrogen combustion gas turbine combustor structure according to claim 4, characterized by The nozzle mounting port (303) is provided with a third connecting flange (304), and the gas nozzle (6) is provided with a fourth connecting flange (601), and a plurality of third mounting bolts (602) are sequentially arranged on the fourth connecting flange (601) along the circumferential direction thereof, and the fourth connecting flange (601) is mounted on the third connecting flange (304) through the third mounting bolt (602).

6. A high efficiency low NOx combustion gas turbine combustor arrangement according to claim 1 wherein, The air inlet assembly (5) comprises a main gas pipe (501) and a branch gas pipe (502); The air inlet assembly (5) extends to the inside of the flame tube (3) and is provided with a main gas pipe (501), and the air outlet of the main gas pipe (501) is arranged beside the air outlet end of the gas nozzle (6); The side of the main gas pipe (501) extends and is provided with a branch gas pipe (502), and the air outlet of the branch gas pipe (502) extends and is arranged at the middle position of the flame tube (3).

7. A high efficiency low NOx combustion gas turbine combustor arrangement according to claim 1 wherein, The air preheating pipe (4) is a spiral structure and is arranged between the shell (1) and the flame tube (3).

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