Gas turbine high temperature tail gas combustion device

Abstract

A high-temperature tail gas combustion-supporting device for a gas turbine includes a shell, a central gas pipe, a central air pipe, a main gas pipe, a central gas burner, a main gas burner, a high-temperature flue gas diversion mechanism, an air pipe with an electric damper, and a flame detector; there is an inspection door on the front side of the shell, and an exhaust gas connecting pipe is provided on the left side of the shell; the electric damper air pipe is installed at the rear end of the shell; there is a high-temperature flue gas diversion mechanism at the right end of the shell; there is also an observation pipe at the left end of the shell; the central gas pipe, the central air pipe and the main gas pipe are respectively installed at the lower end of the shell; the central gas burner is transversely installed in the middle of the shell, and the main gas burner is transversely installed in the middle of the shell, and after installation, they are concentric with the high-temperature flue gas diversion mechanism. The present invention can not only effectively utilize the exhaust gas discharged by the gas turbine, but also reduce the oxygen content and nitrogen oxides NOx in the flue gas, so as to achieve the premise of fully utilizing the heat and oxygen content of the gas turbine tail gas as much as possible, and also reduce environmental pollution.

Description

Technical Field

[0001] The invention relates to the field of high-temperature tail gas combustion-supporting burner equipment for gas turbines, in particular to a high-temperature tail gas combustion-supporting combustion device for gas turbines. Background Art

[0002] When using natural gas to generate electricity, gas turbines will emit high-temperature exhaust gas at a temperature of about 400-500°C. At the same time, due to the low efficiency of combustion and power generation of gas turbines, the exhaust gas produced by combustion contains 15% oxygen that is not fully utilized. In order to achieve effective utilization of energy, usually, this part of high-temperature flue gas is directly passed to the waste heat boiler for waste heat utilization. However, when the power of the gas turbine is relatively small, the flow rate of high-temperature exhaust gas is also very limited, and the waste heat of this part of high-temperature exhaust gas is also relatively small. The power of the waste heat boiler that can be driven is very small, and it is very uneconomical to match it. When the power of the waste heat boiler is large, it cannot meet the actual needs.

[0003] Furthermore, in the existing utilization of waste heat from gas turbines, since the exhaust gas after combustion is not subjected to combustion-supporting combustion, not only the heat energy and oxygen in the high-temperature exhaust gas discharged by the gas turbine are not fully utilized, but also the exhaust gas contains a large amount of nitrogen oxides NOx, which will pollute the environment. Based on the above, it is particularly necessary to provide a high-temperature exhaust gas combustion-supporting burner that can effectively utilize the waste heat of the exhaust gas discharged by the natural gas gas turbine, can be adapted to the use of a larger power waste heat boiler, and can minimize the emission of nitrogen oxides NOx. Summary of the invention

[0004] In order to overcome the disadvantages of the existing gas turbine waste heat utilization that the exhaust gas after combustion is not subjected to combustion-supporting combustion, the heat energy and oxygen in the high-temperature exhaust gas discharged by the gas turbine are not fully utilized, and the discharged exhaust gas contains a large amount of nitrogen oxides NOx, which will cause pollution to the environment, the present invention provides a high-temperature exhaust gas combustion-supporting burner device for a gas turbine which can not only effectively utilize the exhaust gas discharged by the gas turbine, but also independently burn natural gas to provide heat for the waste heat boiler when the gas turbine stops working, thereby ensuring the normal operation of the boiler, and under the joint action of relevant mechanisms, the final exhaust gas emission temperature is reduced, the oxygen content and nitrogen oxides NOx in the exhaust gas are reduced, so as to achieve the premise of fully utilizing the heat and oxygen in the exhaust gas of the gas turbine as much as possible, and also reduce environmental pollution.

[0005] The solution adopted by the present invention to solve the technical problem is:

[0006] A high-temperature exhaust gas combustion-supporting device for a gas turbine comprises a shell, a central gas pipe, a central air pipe and a main gas pipe, a central gas burner, a main gas burner, a high-temperature flue gas diversion mechanism, an air pipe with an electric damper, and a flame detector; the front, rear, left and right sides of the shell are open structures, a maintenance door is provided on the front side of the shell, and an exhaust gas connecting pipe is provided on the left side of the shell; the electric damper air pipe is installed at the rear end of the shell; a high-temperature flue gas diversion mechanism is provided at the right end of the shell; there is also an observation pipe at the left end of the shell; the central gas pipe, the central air pipe and the main gas pipe are respectively installed at the lower end of the shell; the central gas burner is installed transversely in the middle of the shell, and the main gas burner is installed transversely in the middle of the shell, and after installation, they are concentric with the high-temperature flue gas diversion mechanism.

[0007] Furthermore, the shell and the inspection door are composed of two layers, an inner layer and an outer layer, and a heat insulating material is filled between the two layers.

[0008] Furthermore, the central gas burner includes a transverse tube, an inner tube, and an electric ignition gun. The inner tube is transversely installed in the middle of the transverse tube. An ignition gun guide tube is installed in the side end of the transverse tube. The ignition gun is transversely sleeved in the guide tube. A combustion disk is provided at the right end of the transverse tube. The transverse tube is installed in the middle of the shell. An air connecting pipe is provided at the lower left end of the transverse tube. The air connecting pipe and the central air pipe are connected via a metal hose. The left part of the inner tube and the central gas pipe are connected via a metal hose.

[0009] Furthermore, the main gas burner includes a lower gas pipe, an outer pipe, and an annular pipe with an annular opening at the right end. An annular support sleeve is provided on the outside of the right end of the outer pipe. Each outer pipe passes through the support sleeve. The annular support sleeve is installed with a lower combustion disk. A nozzle pipe is arranged horizontally in the openings of the outer pipe. The upper end of the lower gas pipe is installed at the lower end of the opening in the lower middle part of the annular pipe. Three mounting brackets are distributed in the circumferential direction of the annular pipe. The mounting brackets are connected and fixed to the connecting columns inside the shell. The left side of the outer pipe is welded in the opening on the right side of the annular pipe. The right side of the outer pipe is horizontally installed in the annular support sleeve. The lower gas pipe and the main gas pipe are connected via a metal hose.

[0010] Furthermore, the support rod of the central gas burner is tightly sleeved on the connecting column inside the shell, and after installation, it is coaxially arranged with the main gas burner inside the high-temperature flue gas diversion mechanism.

[0011] Further, the high-temperature flue gas diversion mechanism includes a movable valve plate, an axis rod, a servo motor drive mechanism, a connecting rod, a drive rod, a fixed cylinder, and a connecting pipe. A plurality of through holes are arranged at intervals in an annular distribution on the left side of the fixed cylinder, and a guide seat tube is arranged at the upper end of each through hole. There are multiple movable valve plates, drive rods, and connecting rods. A shaft rod is arranged in the middle of the upper end of each movable valve plate, and the shaft rod of each valve plate is respectively sleeved in the shaft hole of one of the guide seat tubes. Multiple valve plates are located between the inner side of the fixed cylinder and the outer side of the connecting pipe. The middle of each drive rod is installed on the upper part of the shaft rod of the upper end of each valve plate in the transverse distribution. The servo motor drive mechanism is installed on the outer side of the fixed cylinder between two of the guide seat tubes. A transmission rod is installed transversely on the upper power output shaft of the servo motor drive mechanism. The transmission rod and the driving rods of two adjacent valve plates arranged in an annular distribution are hingedly installed together through two connecting rods. The driving rod of the valve plate between each two adjacent valve plates is hingedly installed together through two connecting rods. An opening is arranged at the side end of the fixed cylinder, and the flame detector is installed at the outer end of the opening with the lens facing the inside of the fixed cylinder.

[0012] The beneficial effects of the present invention are as follows: during the use of the present invention, the central gas burner and the main gas burner are independently controlled and not interfered with. The central gas burner can not only play the role of ignition, but also help to solve the problem of unstable combustion flame caused by the combustion of 15% oxygen-containing flue gas (waste heat exhaust gas discharged from the gas turbine). The central gas burner mainly stabilizes the flame; the main gas burner can perform combustion-supporting combustion on the waste heat flue gas discharged from the gas turbine, and fully utilizes the heat energy and oxygen in the high-temperature exhaust gas to assist combustion. The main gas burner mainly makes full use of the residual oxygen. The high-temperature flue gas diversion mechanism in the present invention can simultaneously solve the problem of air volume control during the ignition process of the burner and the problem of load matching between the burner and the gas turbine during the combustion process, ensuring the safety of ignition and the problem of burning as much as possible during operation. The air pipe with an electric damper of the present invention mainly functions to ensure the need for air when the main gas burner is burning when the gas turbine is shut down and the waste heat boiler is running. The present invention can not only effectively utilize the exhaust gas discharged by the gas turbine, but also can independently burn natural gas to provide heat for the waste heat boiler when the gas turbine stops working, thereby ensuring the normal operation of the boiler. Moreover, under the joint action of relevant mechanisms, the flue gas is re-combusted, which not only reduces the final flue gas emission temperature, but also reduces the flue gas oxygen content and nitrogen oxides NOx, thereby achieving the premise of fully utilizing the heat and oxygen content of the gas turbine exhaust gas as much as possible, and also reduces environmental pollution. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Figure 2 It is a front view planar structure schematic diagram of the present invention;

[0015] Figure 3It is a schematic diagram of the front plan view of the present invention;

[0016] Figure 4 It is a schematic diagram of the right front plan structure of the main gas burner of the present invention;

[0017] Figure 5 It is a front plan view structural diagram of the main gas burner of the present invention;

[0018] Figure 6 This is a schematic diagram of the front plan view of the central gas burner of the present invention;

[0019] Figure 7 It is a schematic diagram of the right front plan structure of the central gas burner of the present invention;

[0020] Figure 8 It is a schematic diagram of the planar structure of the high-temperature flue gas diversion mechanism of the present invention from the right front view;

[0021] Fig. 9 It is a front view planar structural schematic diagram of the high-temperature flue gas diversion mechanism of the present invention; DETAILED DESCRIPTION

[0022] Figure 1 , 2As shown in , 3, 4, 5, 6, 7, 8, and 9, the high-temperature tail gas combustion-supporting combustion device for a gas turbine comprises a hollow rectangular outer shell 1, a central gas pipe 2 with a flange, a central air pipe 3, and a main gas pipe 4, a central gas burner 5, a main gas burner 6, a high-temperature flue gas diversion mechanism 7, an air pipe 8 with an electric damper, and a flame detector 9 (using an existing mature finished flame detector, mainly detecting the size of the flame generated when the central gas burner 5 and the main gas burner 6 are burned); the upper end of the shell 1 is provided with lifting ears 101 around (to facilitate the lifting of the entire device), and the lower parts of the front and rear ends are horizontally welded with support plates 102; the The front, rear, left and right sides of the shell 1 are open structures. A movable inspection door 103 is hingedly installed on the front side of the shell 1 (the inspection door is opened for inspection when the internal parts of the shell need to be inspected or replaced, and the inspection door is closed at other times). An exhaust gas connecting pipe 104 with a flange is installed on the left side of the shell 1 through a screw nut. The interior of the exhaust gas connecting pipe 104 is connected to the shell, and the exhaust gas connecting pipe 104 is connected to the exhaust gas pipe flange of the gas turbine through a screw nut; the front side end of the electric damper air pipe 8 is installed on the rear side end of the shell 1 through a screw nut and communicates with the inside of the shell 1. The rear side end flange of the electric damper air pipe 8 is connected to the exhaust gas pipe flange of one of the blowers. The exhaust pipe flange is connected by screws and nuts; a high-temperature flue gas diversion mechanism 8 is installed at the right end of the shell 1 through screws and nuts, and the inside of the high-temperature flue gas diversion mechanism 8 is communicated with the shell 1. The right end flange of the high-temperature flue gas diversion mechanism 8 and the hot gas pipe flange of the waste heat boiler are connected by screws and nuts; an observation tube 106 is horizontally welded to the front and rear ends of the lower left end of the shell 1, and a heat-resistant tempered glass plate 1061 is installed at the left outer end of the observation tube 106 through flange screws and nuts (the combustion situation in the right side of the shell 1 is observed from the glass plate 1061); the middle of the central gas pipe 2, the central air pipe 3 and the main gas pipe 4 from left to right They are vertically distributed and welded at a certain distance in the middle of the lower end of the shell 1. An ignition wire conduit 107 is also vertically welded in the middle of the lower end of the shell between the central gas pipe 2 and the central air pipe 3, and the downward height of the conduit is lower than the downward height of the central air pipe 3; the lower end flanges of the central gas pipe 2, the central air pipe 3, and the main gas pipe 4 are respectively connected to one of the output end flanges of the external natural gas pipe, the exhaust pipe flange of another blower, and the other output end flange of the natural gas pipe through screws and nuts; the middle part of the central gas burner 5 is horizontally installed in the middle part of the shell 1, and the main gas burner 6 is horizontally installed in the middle part of the shell 1.

[0023] Figure 1 , 2As shown in FIGS. 3, 4, 5, 6, 7, 8 and 9, the height of the rectangular support plate 102 is higher than the lower ends of the central gas pipe 2, the central air pipe 3 and the main gas pipe 4. The shell 1 has two layers, inner and outer, and a heat insulation material 108 (such as silicon aluminum fiber) is filled between the two layers. The inspection door 103 has two sides, inner and outer, and the inner layer has a heat insulation material. The central gas burner includes a transverse tube 51, an inner tube 52, and an electric ignition gun 53. The inner tube 52 is transversely welded to the middle of the inner end of the transverse tube 51. The left end of the inner tube 52 is located in the middle of the left outer end of the transverse tube 51 and is bent downward and sealed with the left end of the transverse tube 51. An ignition gun guide tube 54 is transversely installed in the front end of the transverse tube 51 and has an opening at the left end. The ignition gun 53 is transversely sleeved in the guide tube and its connecting wire is located at the left outer end of the transverse tube. A combustion disk 55 with a plurality of air holes distributed at a certain distance is welded in the right end of the transverse tube. The right end of the inner tube 52 is welded in the opening in the middle of the combustion disk 55. The ignition gun 53 The right end ignition head is located at the outer end side of the combustion disk 55 and the inner tube 52, and the wire connected to the ignition gun 53 is led out to the middle of the lower outer end of the shell 1 through the ignition wire guide tube 107. Three support rods 511 are distributed in a ring in the middle of the outer end of the cross tube 51. The three support rods 511 are fixedly installed on the connecting column 12 of the shell 1 through nuts, so that the middle part of the cross tube 51 is fixed in the middle of the shell 1. An air connecting pipe 56 is welded to the lower left end of the cross tube 51. The air connecting pipe 56 and the central air pipe 3 are connected through a metal hose 10, and the left outer part of the inner tube 52 and the central gas pipe 2 are connected through a metal hose 10. The main gas burner 6 includes a lower gas pipe 61, an outer pipe 62, and an annular pipe 64 with an annular opening at the right end. An annular support sleeve 65 is welded to the outside of the right end of the outer pipe 62. Each outer pipe 62 passes through the annular support sleeve 65. The sleeve 65 is installed with a lower combustion disk 63. A nozzle pipe 66 (a total of 12) is arranged horizontally in the opening of the outer pipe 62. A plurality of small openings are distributed at a certain distance on the surface of the right lower combustion disk 63 as gas diffusion disk openings 631. The upper end of the lower gas pipe 61 is welded to the middle of the lower end of the annular pipe 64. The left side of the outer tube 62 is welded horizontally in the right side opening of the annular tube 64. Three support rods 67 are welded on the circumference of the annular tube 64. The three support rods 67 are fixedly mounted on the connecting column 12 inside the shell by nuts, so that the left part of the main gas burner 4 is mounted in the middle of the shell 1 and the high-temperature flue gas diversion mechanism 8. The lower gas pipe 61 and the main gas pipe 4 are connected by a metal hose 10. The lower gas pipe 61 and the main gas pipe 4, the annular tube 64 and the space between the outer tube 62, and the multiple nozzle pipes 66 are interconnected and isolated from the outside. The right end of the horizontal tube 51 of the central gas burner is arranged in the annular tube 64 of the main gas burner, and the combustion disk 55 and the gas diffusion disk 65 are in a vertical plane from top to bottom.

[0024] Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7, 8, and 9, the high-temperature flue gas diversion mechanism includes multiple movable valve plates 71, a shaft 72, a servo motor drive mechanism 73, a connecting rod 74, a driving rod 75, a support plate 78, a fixed cylinder 105, and a connecting pipe 11. Upper support rods 78 are welded to the left and right outer ends of the connecting pipe 11. The two support rods 78 support the inner sides of the fixed cylinder 105 and the connecting pipe 11. A plurality of (12) through holes 1052 are annularly distributed at a certain equal distance on the left side of the fixed cylinder 105. A guide seat tube 1053 is vertically installed on the outer side of the upper end of each through hole through a screw nut. There are multiple (12) identical movable valve plates 71, and each movable valve plate 7 1 is welded with a shaft rod 72 at the middle of the upper end, and the shaft rod 72 of each valve plate is respectively sleeved in the shaft hole of one of the guide seat tubes 1053 and the upper end of each shaft rod 72 is located at the outer end of the fixed cylinder 105, and the plurality of valve plates 71 are located between the inner side of the fixed cylinder 105 and the outer side of the connecting tube 11, and the upper and lower ends of the valve plates 71 and the inner side of the fixed cylinder 105 and the outer side of the connecting tube 11 are separated by a very small distance (0.5 mm). The shape formed by the plurality of valve plates 71 in a vertical state is close to the shape formed by the inner side of the fixed cylinder 105 and the outer side of the connecting tube 11, and the volume is slightly smaller than the volume of the space between the inner side of the fixed cylinder 105 and the outer side of the connecting tube 11, and the driving rod 75 has the same plurality of (12) ), each driving rod 75 has a fixed through hole in the middle and shaft holes on both sides, each driving rod 75 is transversely distributed and fixed to the upper part of the shaft rod 72 on the upper end of each valve plate through a nut through the middle fixed through hole, and the servo motor driving mechanism 73 is installed on the outside of the fixed cylinder 105 between two guide seat tubes 1053 through a screw nut, and the upper end power output shaft of the servo motor driving mechanism 73 is transversely installed with a transmission rod 77 with shaft holes on both sides, and the left part of the transmission rod 77 of the power output shaft and the left side end of the driving rod 75 of the annularly distributed rear side valve plate are hinged and installed together through a connecting rod 74 (a total of 12), and the right part of the transmission rod 77 of the power output shaft and the right side of the driving rod 75 of the front side valve plate The two ends are hinged together by a connecting rod 74, between each adjacent two valve plates 71, the left part of the driving rod of the front side end valve plate 71 and the left part of the driving rod 75 of the annularly distributed rear side end valve plate are hinged together by a connecting rod 74, the right part of the driving rod of the front side end valve plate 71 and the right part of the driving rod 75 of the annularly distributed adjacent front valve plate are hinged together by a connecting rod 74, the driving rods of multiple valve plates 71 and the transmission rod 77 of the servo motor driving mechanism are connected end to end and hinged together by the connecting rod 74, there is an opening at the right side end of the valve plate 71 in the middle of the front side end of the fixed cylinder 105, the flame detector 9 is installed at the outer end of the opening through a screw nut and its lens faces the fixed cylinder 105.

[0025] Figure 1 , 2As shown in , 3, 4, 5, 6, 7, 8, and 9, when the present invention is used, the waste heat exhaust gas discharged by the gas turbine enters the outer shell 1 through the exhaust gas connecting pipe 104, and enters the waste heat boiler from the space between the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11. After turning on the power of the flame detector 9, the flame condition of the subsequent combustion exhaust gas can be detected. The air output by the second external blower enters the transverse pipe 51 of the central burner through the central air pipe 3 and sprays out from the opening of the combustion disk 55 at the right front end of the transverse pipe. The external natural gas enters the inner pipe 52 from the central gas pipe 2 and sprays out from the right front end of the inner pipe to mix with the air. After the user turns on the power of the ignition gun 53 (turn off the power switch after ignition), the ignition head at the right front end of the ignition gun 53 generates an electric spark to ignite the mixed gas. At the same time, the external natural gas enters the annular pipe 64 of the main burner through the main gas pipe 4, and enters the space formed by the outer pipe 62 from the annular pipe 64. The natural gas sprays out from the opening of the nozzle pipe 66 and is ignited by the flame generated at the right end of the central burner. During the combustion, the main burner 5 will burn the exhaust gas input from the gas turbine (the exhaust gas flows into the left end of the connecting pipe 11 and flows out from the right end into the waste heat boiler) and utilize the 15% oxygen content in the exhaust gas at the same time, which not only plays a role in combustion support, but also reduces the oxygen content of the flue gas and the exhaust temperature of the flue gas (the exhaust temperature is only about 100°C), so as to achieve the premise of fully utilizing the heat and oxygen content of the gas turbine exhaust gas as much as possible, and reduce environmental pollution. In the use of the present invention, the central gas burner and the main gas burner are independently controlled and not interfered with. The central gas burner can not only play the role of ignition, but also help to solve the problem of unstable combustion flame caused by the combustion support of 15% oxygen-containing flue gas (that is, the waste heat exhaust gas of about 450°C discharged from the gas turbine). The central gas burner mainly stabilizes the flame; the main gas burner can perform combustion support on the waste heat flue gas discharged by the gas turbine again, and fully utilizes the heat energy and oxygen in the high-temperature exhaust gas for combustion support. The main gas burner mainly makes full use of the residual oxygen.

[0026] Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7, 8, and 9, in the initial state of the present invention, due to the excessive amount of waste heat gas input, it is possible to affect the ignition of the ignition gun 53 of the central gas burner. The operator can turn on the power switch of the servo motor reduction mechanism 73 for a certain period of time (about 3 seconds), so that the two ends of the transmission rod 77 of the servo motor reduction mechanism 73 drive the driving rods 75 on the upper parts of the shafts 72 of all the two adjacent valve plates 71 to move forward and backward to a certain position respectively, and each driving rod 75 drives each valve plate 71 to rotate a certain angle. In this way, the gaps between the multiple valve plates 71 and the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11 become larger, and most of the waste heat exhaust gas of the external gas turbine directly enters the waste heat boiler from between the inner end of the fixed cylinder 105 and the outer end of the connecting pipe 11, thereby preventing ignition difficulties caused by excessive waste heat exhaust gas. After the ignition gun ignites the gas at the front end of the combustion disk 55 of the central burner, the operator turns on the power switch of the servo motor reduction mechanism 73 in the reverse direction for a certain period of time (about 3 seconds), so that the two ends of the transmission rod 77 of the servo motor reduction mechanism 73 drive the driving rods 75 on the upper parts of the shaft 72 of the two adjacent valve plates 71 to move backward and forward to a certain position respectively, and each driving rod 75 drives the valve plate 71 to rotate in the opposite direction by a certain angle to return to the initial state. In this way, the upper and lower ends of the valve plate 71 and the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11 are spaced very close again, ensuring that a large amount of waste heat exhaust gas flows in through the left end of the connecting pipe 11 and flows out through the right end to be burned and assisted by the central gas burner 5 and the main gas burner 6 and then enters the waste heat boiler.

[0027] Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, 8 and 9, in the application of the present invention, when the gas turbine is shut down but the waste heat boiler needs heat, since there is no more residual oxygen supply from the exhaust gas, the main gas burner 6 will burn poorly or even go out due to lack of oxygen. The operator can turn on the power switch of the electric damper, so the damper of the electric damper is opened, and the air input by the first external blower enters the housing 1 through the air pipe 8, providing suitable oxygen for the combustion of the central gas burner, thereby ensuring the combustion (when burning the waste heat gas discharged from the gas turbine, turn off the power switch of the electric damper, so the damper of the electric damper is closed, preventing the waste heat exhaust gas from escaping from the air pipe 8.). When the present invention is used, not only can the waste heat exhaust gas discharged by the gas turbine be effectively utilized, but also when the gas turbine stops working, the gas can be burned alone to provide heat for the waste heat boiler, thereby ensuring the normal operation of the boiler. Moreover, under the joint action of relevant mechanisms, the flue gas is burned again, which not only reduces the final flue gas emission temperature (the final temperature is only about 100°C), but also reduces the flue gas oxygen content and nitrogen oxides NOx, thereby achieving the premise of fully utilizing the heat and oxygen content of the gas turbine exhaust gas as much as possible, and reducing environmental pollution.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas turbine high temperature tail gas combustion device, characterized in that It includes a shell, a central gas pipe, a central air pipe and a main gas pipe, a central gas burner, a main gas burner, a high-temperature flue gas diversion mechanism, an air pipe with an electric damper, and a flame detector; the front, rear, left and right sides of the shell are open structures, there is an inspection door on the front side of the shell, and there is an exhaust gas connecting pipe on the left side of the shell; the air pipe with the electric damper is installed at the rear end of the shell; there is a high-temperature flue gas diversion mechanism at the right end of the shell; there is also an observation pipe at the left end of the shell; the central gas pipe, the central air pipe and the main gas pipe are respectively installed at the lower end of the shell; the central gas burner is transversely installed in the middle of the shell, and the main gas burner is transversely installed in the middle of the shell, and after installation, they are concentric with the high-temperature flue gas diversion mechanism; the support rod of the central gas burner is tightly sleeved on the connecting column inside the shell, and after installation, it is kept concentric with the main gas burner and arranged inside the high-temperature flue gas diversion mechanism; the high-temperature flue gas diversion mechanism includes a movable valve plate, a shaft rod, and a servo A servo motor drive mechanism, a connecting rod, a driving rod, a fixed cylinder, and a connecting tube are provided with a plurality of through holes at intervals of annular distribution on the left side of the fixed cylinder, a guide seat tube is provided at the upper end of each through hole, and there are a plurality of identical movable valve plates, driving rods, and connecting rods. A shaft rod is provided at the middle part of the upper end of each movable valve plate, and the shaft rod of each valve plate is respectively sleeved in the shaft hole of one of the guide seat tubes. Multiple valve plates are located between the inner side of the fixed cylinder and the outer side of the connecting tube, and the middle part of each driving rod is installed at the upper part of the shaft rod at the upper end of each valve plate in the transverse distribution. The servo motor drive mechanism is installed at the outer side of the fixed cylinder between two of the guide seat tubes, and a transmission rod is installed transversely on the upper power output shaft of the servo motor drive mechanism. The transmission rod and the driving rods of two adjacent valve plates distributed in annular distribution are hingedly installed together through two connecting rods, and the driving rod of the valve plate between each two adjacent valve plates is hingedly installed together through two connecting rods. An opening is provided at the side end of the fixed cylinder, and a flame detector is installed at the outer end of the opening with the lens facing the inside of the fixed cylinder.

2. The gas turbine high temperature tail gas combustion supporting device according to claim 1, characterized in that: The shell and the inspection door are composed of two layers, inner and outer, with heat insulation materials filling between the two layers.

3. The gas turbine high temperature tail gas combustion supporting device according to claim 1, characterized in that: The central gas burner includes a transverse tube, an inner tube, and an electric ignition gun. The inner tube is transversely installed in the middle of the transverse tube. An ignition gun guide tube is installed in the side end of the transverse tube. The ignition gun is transversely sleeved in the guide tube. A combustion disk is provided at the right end of the transverse tube. The transverse tube is installed in the middle of the shell. An air connecting pipe is provided at the lower left end of the transverse tube. The air connecting pipe and the central air pipe are connected by a metal hose. The left part of the inner tube and the central gas pipe are connected by a metal hose.

4. The gas turbine high temperature tail gas combustion supporting device according to claim 1, characterized in that: The main gas burner includes a lower gas pipe, an outer pipe, and an annular pipe with an annular opening at the right end. There is an annular support sleeve on the outside of the right end of the outer pipe. Each outer pipe passes through the support sleeve. The annular support sleeve is installed with a lower combustion disk. There is a nozzle pipe horizontally arranged in the openings of the outer pipe. The upper end of the lower gas pipe is installed at the lower end of the opening in the lower middle part of the annular pipe. Three mounting brackets are distributed in the circumferential direction of the annular pipe. The mounting brackets are connected and fixed to the connecting columns inside the shell. The left side of the outer pipe is welded in the opening on the right side of the annular pipe. The right side of the outer pipe is horizontally installed in the annular support sleeve. The lower gas pipe and the main gas pipe are connected via a metal hose.

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