CN111380045A - Combustion-supporting combustion device for high-temperature tail gas of gas turbine - Google Patents

Abstract

The combustion-supporting combustion device of high-temperature tail gas of the gas turbine comprises 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 shunting mechanism, an air pipe with an electric air door and a flame detector; an access door is arranged on the front side of the shell, and a waste gas connecting pipe is arranged on the left side of the shell; the electric air door air pipe is arranged at the rear side end of the shell; the right side end of the shell is provided with a high-temperature flue gas shunting mechanism; the left end of the shell is also provided with an observation tube; the central gas pipe, the central air pipe and the main gas pipe are respectively arranged at the lower end of the shell; the central gas burner is transversely arranged in the middle of the shell, the main gas burner is transversely arranged in the middle of the shell, and the central gas burner and the high-temperature flue gas shunting mechanism are concentric after being arranged. The invention not only can effectively utilize the waste gas discharged by the gas turbine, but also reduces the oxygen content of the flue gas and the nitrogen oxide NOx, and reduces the environmental pollution on the premise of fully utilizing the heat and the oxygen content of the tail gas of the gas turbine as far as possible.

Description

Combustion-supporting combustion device for high-temperature tail gas of gas turbine

Technical Field

The invention relates to the field of high-temperature tail gas combustion-supporting combustor equipment of a gas turbine, in particular to a high-temperature tail gas combustion-supporting combustion device of the gas turbine.

Background

When the gas turbine uses natural gas and the like to generate electricity, high-temperature tail gas is emitted, the temperature is about 400-500 ℃, and meanwhile, because the combustion generating efficiency of the gas turbine is not high, 15 percent of oxygen contained in the tail gas generated by combustion is not completely utilized. In order to achieve effective utilization of energy, under normal conditions, the high-temperature flue gas is directly communicated to a waste heat boiler for waste heat utilization, but under the condition that the power of a gas turbine is low, the flow of generated high-temperature tail gas is very limited, the waste heat quantity of the high-temperature tail gas is small, the power of the waste heat boiler which can be driven is very low, the waste heat boiler is not economical to match, and the actual requirement cannot be met when the power of the waste heat boiler is high.

In addition, in the existing gas turbine waste heat utilization, because combustion-supporting combustion is not carried out on the combusted tail gas, not only the heat energy and the oxygen amount in the high-temperature tail gas discharged by the gas turbine are not fully utilized, but also the discharged waste gas contains a large amount of nitrogen oxides NOx, and the environment is polluted. Based on the above, it is particularly necessary to provide a high-temperature exhaust gas combustion-supporting burner which can effectively utilize the exhaust gas waste heat discharged by a natural gas turbine, can be adapted to a waste heat boiler with larger power, and can reduce the discharge amount of nitrogen oxides NOx as much as possible.

Disclosure of Invention

In order to overcome the defects that in the prior waste heat utilization of a gas turbine, combustion-supporting combustion is not carried out on the tail gas after combustion, the heat energy and the oxygen content in the high-temperature tail gas discharged by the gas turbine are not fully utilized, and the discharged waste gas contains a large amount of nitrogen oxides NOx and causes environmental pollution, the invention provides the gas turbine high-temperature tail gas combustion-supporting burner device which not only can effectively utilize the waste gas discharged by the gas turbine, but also can independently burn natural gas and the like to provide heat for a waste heat boiler when the gas turbine stops working so as to ensure the normal working of the boiler, and reduces the final discharge temperature of the flue gas, the oxygen content and the nitrogen oxides NOx in the flue gas under the combined action of related mechanisms, thereby reducing the environmental pollution on the premise of fully utilizing the heat and the oxygen content of the tail gas of the gas turbine as far as possible.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the combustion-supporting combustion device of high-temperature tail gas of the gas turbine comprises 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 shunting mechanism, an air pipe with an electric air door and a flame detector; the front, the rear, the left and the right peripheries of the shell are of an open structure, an access door is arranged on the front side of the shell, and a waste gas connecting pipe is arranged on the left side of the shell; the electric air door air pipe is arranged at the rear side end of the shell; the right side end of the shell is provided with a high-temperature flue gas shunting mechanism; the left end of the shell is also provided with an observation tube; the central gas pipe, the central air pipe and the main gas pipe are respectively arranged at the lower end of the shell; the central gas burner is transversely arranged in the middle of the shell, the main gas burner is transversely arranged in the middle of the shell, and the central gas burner and the high-temperature flue gas shunting mechanism are concentric after being arranged.

Furthermore, the shell and the access door are two layers, namely an inner layer and an outer layer, and a heat insulation material is filled between the two layers.

Further, central gas burner is including violently managing, inner tube, electric ignition gun, and the inner tube is transversely installed at violently managing interior middle part, violently manages the interior ignition gun pipe of side, and the ignition gun transversely overlaps in the pipe, and the right side end of violently managing has the burning dish, violently manages and install in the middle of the casing, and the left end lower part of violently managing has the air connecting pipe, and air connecting pipe and central air pipe are connected through metal collapsible tube, and inner tube left part and central gas pipe are connected through metal collapsible tube.

Further, main gas burner includes down the gas pipe, the outer tube, the right side end has annular open-ended annular pipe, there is annular support lagging outside the outer tube right side end, every outer tube all passes the support lagging, the burning dish is installed down to annular support lagging, transversely have a nozzle pipe in the trompil of outer tube respectively, the trompil lower extreme at middle part under the annular pipe is installed to the upper end of gas pipe down, it has three installing support to distribute on the circumferencial direction of annular pipe, installing support is connected and is fixed with the inside spliced pole of casing, the welding is in the trompil on annular pipe right side in the outer tube left side, outer tube right side transverse mounting is in annular support lagging, gas pipe and main gas pipe are connected through metal collapsible tube down.

Furthermore, the support rod of the central gas burner is tightly sleeved on the connecting column in the shell, and the support rod and the main gas burner are concentrically arranged in the high-temperature flue gas diversion mechanism after being installed.

Furthermore, the high-temperature flue gas shunting mechanism comprises movable valve plates, shaft levers, servo motor driving mechanisms, connecting rods, driving rods, fixed cylinders and connecting pipes, wherein a plurality of through holes are annularly distributed on the left side of the fixed cylinder at intervals, a guide seat pipe is arranged at the upper end of each through hole, the movable valve plates, the driving rods and the connecting rods are respectively provided with the same plurality of the movable valve plates, the shaft lever is arranged in the middle of the upper end of each movable valve plate, the shaft lever of each valve plate is respectively sleeved in the shaft hole of one guide seat pipe, the plurality of valve plates are positioned between the inner side of the fixed cylinder body and the outer side of the connecting pipe, the transversely distributed middle part of each driving rod is arranged on the upper part of the shaft lever at the upper end of each valve plate, the servo motor driving mechanism is arranged on the outer side of the fixed cylinder body between the two guide seat pipes, the driving rod of the valve plate between every two adjacent valve plates is hinged together through two connecting rods, an opening is formed in the side end of the fixed cylinder, the flame detector is installed at the outer side end of the opening, and the lens faces the inside of the fixed cylinder.

The invention has the beneficial effects that: when the central gas burner and the main gas burner are used, the central gas burner and the main gas burner are mutually independently controlled and are not interfered, the central gas burner not only can play a role in ignition, but also is beneficial to solving the problem of unstable combustion flame possibly caused by combustion supporting of flue gas (waste heat and waste gas discharged by a gas turbine) with oxygen content of 15 percent, and the central gas burner mainly takes stable flame; the main gas burner can perform combustion-supporting combustion again on waste heat flue gas discharged by the gas turbine, makes full use of heat energy in high-temperature tail gas and oxygen for combustion supporting, and takes full use of residual oxygen as a main part. The high-temperature flue gas shunting mechanism can simultaneously solve the air volume control problem in the ignition process of the combustor and the load matching problem of the combustor and the gas turbine in the combustion process, and ensures the ignition safety and the problem of burning as far as possible in operation. The air pipe with the electric air door mainly has the function of ensuring the air requirement when the main gas combustor burns when the gas turbine stops and the waste heat boiler operates. The invention not only can effectively utilize the waste gas discharged by the gas turbine, but also can independently burn natural gas and the like to provide heat for the waste heat boiler when the gas turbine stops working, thereby ensuring the normal working of the boiler, and under the combined action of relevant mechanisms, because the smoke is burned again, the final emission temperature of the smoke is reduced, the oxygen content of the smoke and nitrogen oxide NOx are reduced, and the environmental pollution is reduced on the premise of achieving the full utilization of the heat and the oxygen content of the tail gas of the gas turbine as far as possible.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the front plan structure of the present invention;

FIG. 3 is a schematic front top plan view of the present invention;

FIG. 4 is a schematic view of the right front plan view of the main gas burner of the present invention;

FIG. 5 is a schematic view of the front plan view of the main gas burner of the present invention;

FIG. 6 is a schematic front top plan view of the gas burner of the present invention;

FIG. 7 is a schematic view of the right front plan view of the central gas burner of the present invention;

FIG. 8 is a schematic structural diagram of a right front view of the high temperature flue gas flow distribution mechanism of the present invention;

FIG. 9 is a front plan view of the high temperature flue gas diversion mechanism of the present invention;

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, and 9, the combustion-supporting combustion device for high-temperature exhaust gas of a gas turbine includes a hollow rectangular outer casing 1, a central gas pipe 2 with a flange, a central air pipe 3, 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 air door, and a flame detector 9 (using a conventional mature flame detector product, mainly detecting the size of flame generated when the central gas burner 5 and the main gas burner 6 are burning); lifting lugs 101 (which are convenient for lifting the whole equipment) are arranged on the periphery of the upper end of the shell 1, and supporting plates 102 are transversely welded on the lower parts of the front end and the rear end; the front, the rear, the left and the right peripheries of the shell 1 are of an open structure, a movable access door 103 is hinged to the front side of the shell 1 (the access door is opened for access when an internal part of the shell needs to be accessed or replaced, and the access door is closed when the internal part of the shell is flat), a waste gas connecting pipe 104 with a flange plate is arranged at the left end of the shell 1 through a screw nut, the interior of the waste gas connecting pipe 104 is communicated with the shell, and the waste gas connecting pipe 104 is connected with a waste gas exhaust pipe flange plate of the gas turbine through a screw nut; the front side end of the electric air door air pipe 8 is arranged at the rear side end of the shell 1 through a screw nut and is communicated with the inside of the shell 1, and a flange plate at the rear side end of the electric air door air pipe 8 is connected with an exhaust pipe flange plate of one of the blowers through a screw nut; a high-temperature flue gas shunting mechanism 8 is mounted at the right side end of the shell 1 through a screw nut, the interior of the high-temperature flue gas shunting mechanism 8 is communicated with the interior of the shell 1, and a flange plate at the right side end of the high-temperature flue gas shunting mechanism 8 is connected with a flange plate of a hot gas pipe of the waste heat boiler through the screw nut; an observation tube 106 is transversely welded at the front end and the rear end of the lower part of the left side end of the shell 1 respectively, and a heat-resistant tempered glass plate 1061 is mounted at the left outer side end of the observation tube 106 through a flange screw nut (the right internal combustion condition of the shell 1 is observed from the glass plate 1061); the middle parts of the central gas pipe 2, the central air pipe 3 and the main gas pipe 4 are respectively and vertically distributed and welded in the middle part of the lower end of the shell 1 at intervals from left to right, an ignition wire guide pipe 107 is also vertically welded in the middle part 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 guide pipe is lower than that of the central air pipe 3; the lower end flange discs of the central gas pipe 2, the central air pipe 3 and the main gas pipe 4 are respectively connected with one output end flange disc of an external natural gas pipe, an exhaust pipe flange disc of another blower and the other output end flange disc of the natural gas pipe through screw nuts; the middle part of the central gas burner 5 is transversely arranged at the middle part in the shell 1, and the main gas burner 6 is transversely arranged at the middle part in the shell 1.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, the rectangular support plate 102 has a height higher than the height of the central gas pipe 2 and the lower ends of the central air pipe 3 and the main gas pipe 4. The shell 1 is composed of an inner layer and an outer layer, a heat insulation material 108 (such as silicon-aluminum fiber) is filled between the two layers, the access door 103 is arranged on the inner side and the outer side, and the inner layer is provided with a heat insulation material. The central gas burner comprises a transverse pipe 51, an inner pipe 52 and an electric ignition gun 53, wherein the inner pipe 52 is transversely welded in the middle of the inner side end of the transverse pipe 51, the left side end of the inner pipe 52 is positioned in the middle of the left outer side end of the transverse pipe 51, is bent downwards and is sealed with the left end of the transverse pipe 51, an ignition gun guide pipe 54 is transversely installed in the front side end of the transverse pipe 51, the left end of the ignition gun 53 is provided with an opening, the ignition gun 53 is transversely sleeved in the guide pipe, the connecting lead of the ignition gun 53 is positioned at the left outer side end of the transverse pipe, a combustion disc 55 with a plurality of air holes distributed at certain intervals is welded in the right side end of the transverse pipe, the right side end of the inner pipe 52 is welded in the opening in the middle of the combustion disc 55, the right end ignition head of the ignition gun 53 is positioned at the lateral parts of the outer side ends, the three support rods 511 are respectively fixedly arranged on the connecting columns 12 of the shell 1 through nuts, so that the middle of the transverse pipe 51 is fixed in the middle of the shell 1, the lower part of the left end of the transverse pipe 51 is welded with an air connecting pipe 56, the air connecting pipe 56 is connected with the central air pipe 3 through a metal hose 10, and the left outer part of the inner pipe 52 is connected with the central gas pipe 2 through a metal hose 10. The main gas burner 6 comprises a lower gas pipe 61, an outer pipe 62, an annular pipe 64 with an annular opening at the right side end, an annular supporting sleeve plate 65 is welded at the outer part of the right side end of the outer pipe 62, each outer pipe 62 penetrates through the annular supporting sleeve 65, a lower combustion disc 63 is installed on the sleeve plate 65, a nozzle pipe 66 (totally 12) is transversely arranged in the hole of the outer pipe 62 respectively, a plurality of small holes are distributed on the surface of the lower combustion disc 63 at certain intervals at the right side to serve as gas diffusion disc holes 631, the upper end of the lower gas pipe 61 is welded at the lower end of the hole in the middle of the lower end of the annular pipe 64, the left side of the outer pipe 62 is transversely welded in the right hole of the annular pipe 64, three support rods 67 are distributed and welded on the circumference of the annular pipe 64, the three support rods 67 are fixedly installed on a connecting column 12 in the shell respectively through nuts, so that the left part of, the lower gas pipe 61 is connected with the main gas pipe 4 through the metal hose 10, and the inside of the lower gas pipe 61, the space between the inside of the main gas pipe 4, the inside of the annular pipe 64 and the outer pipe 62, and the inside of the plurality of nozzle pipes 66 are communicated with each other and isolated from the outside. The right end of the cross pipe 51 of the central gas burner is arranged in the annular pipe 64 of the main gas burner, and the combustion disc 55 and the gas diffusion disc 65 are in a vertical plane from top to bottom.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, and 9, the high temperature flue gas diversion mechanism includes a plurality of movable valve plates 71, a shaft rod 72, a servo motor driving mechanism 73, a connecting rod 74, a driving rod 75, a supporting plate 78, a fixed cylinder 105, and a connecting pipe 11, wherein the left and right outer ends of the connecting pipe 11 are respectively welded with the upper supporting rod 78, the two supporting 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 on the left side of the fixed cylinder 105 at certain intervals, the outer side of the upper end of each through hole is respectively vertically provided with a guide seat pipe 1053 through a screw nut, the movable valve plates 71 are provided with a plurality of same (12), the middle part of the upper end of each movable valve plate 71 is welded with one shaft rod 72, the shaft rod 72 of each valve plate is respectively sleeved in the shaft hole of one guide seat pipe 105, the plurality of valve plates 71 are positioned between the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11, the upper end and the lower end of each valve plate 71 are separated from the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11 by a very small distance (0.5mm), the shape formed by the plurality of valve plates 71 is close to the shape formed by the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11 in a vertical state, 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 pipe 11, the driving rods 75 are the same (12), both side ends of each driving rod 75 are provided with shaft holes, each driving rod 75 is transversely distributed and fixed on the upper part of a shaft rod 72 at the upper end of each valve plate through a central fixing through hole by a nut, the servo motor driving mechanism 73 is arranged on the outer side of the fixed cylinder 105, the left part of a transmission rod 77 of the power output shaft and the left side end of a driving rod 75 of the circularly distributed rear side end valve plate are hinged together through a connecting rod 74 (totally 12), the right part of the transmission rod 77 of the power output shaft and the right side end of the driving rod 75 of the front side end valve plate are hinged together through a connecting rod 74, between every two adjacent valve plates 71, the left part of the driving rod 75 of the front side end valve plate 71 and the left part of the driving rod 75 of the circularly distributed rear side end valve plate are hinged together through a connecting rod 74, the right part of the driving rod 71 of the front side end valve plate and the right part of the driving rod 75 of the circularly distributed adjacent front valve plate are hinged together through a connecting rod 74, the driving rods of the plurality of valve plates 71 and the transmission rod 77 of the servo motor driving mechanism, an opening is formed in the middle of the front side end of the fixed cylinder 105 at the right side end of the valve plate 71, the flame detector 9 is mounted at the outer side end of the opening through a screw nut, and the lens of the flame detector faces the inside of the fixed cylinder 105.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, when the present invention is used, the exhaust heat gas discharged from the gas turbine enters the outer shell 1 through the exhaust gas connecting pipe 104, and enters the exhaust heat boiler from the space between the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11. After the power supply of the flame detector 9 is turned on, the flame condition of the subsequent combustion tail gas can be detected. Air output by the second external air blower enters the transverse pipe 51 of the central burner through the central air pipe 3 and is sprayed out from the opening of the combustion disc 55 at the front end of the right side of the transverse pipe, external natural gas enters the inner pipe 52 from the central gas pipe 2 and is sprayed out from the front end of the right side of the inner pipe to be mixed with the air, and after a user turns on a power supply of the ignition gun 53 (turns off a power switch after ignition), an electric spark is generated at the front end fire head at the right side of the ignition gun 53 to ignite the mixed gas. Meanwhile, 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, and the natural gas is sprayed 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 combustion of the main burner 5, waste gas input by the gas turbine is combusted (the waste gas flows into the left end of the connecting pipe 11, flows out of the right end of the connecting pipe and enters the waste heat boiler), 15% of oxygen content in the waste gas is utilized, combustion supporting effect can be achieved, the oxygen content of smoke and the emission temperature of the smoke (the emission temperature is only about 100 ℃) can be reduced, and the environmental pollution is reduced on the premise that the heat and the oxygen content of tail gas of the gas turbine are fully utilized as far as possible. When the central gas burner and the main gas burner are used, the central gas burner and the main gas burner are mutually independently controlled and are not interfered, the central gas burner not only can play a role in ignition, but also is beneficial to solving the problem that combustion flame instability possibly caused by combustion supporting of flue gas (namely waste heat tail gas at about 450 ℃ discharged by a gas turbine) with oxygen content of 15 percent is solved, and the central gas burner mainly takes stable flame; the main gas burner can perform combustion-supporting combustion again on waste heat flue gas discharged by the gas turbine, makes full use of heat energy in high-temperature tail gas and oxygen for combustion supporting, and takes full use of residual oxygen as a main part.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, in an initial state of the present invention, because the input residual heat is too large, the ignition gun 53 of the central gas burner is possibly influenced to ignite, and an operator can turn on the power switch of the servo motor speed reducing mechanism 73 for a certain time (about 3 seconds), so that the two ends of the driving rod 77 of the servo motor speed reducing mechanism 73 drive the driving rods 75 on the upper parts of the shaft rods 72 of all the adjacent two valve plates 71 to respectively move forwards and backwards for a certain position, each driving rod 75 drives each valve plate 71 to rotate for a certain angle, thus, gaps among the valve plates 71, the inner side of the fixed cylinder 105 and the outer side of the connecting pipe 11 are enlarged, most of waste heat and waste gas of an external gas turbine directly enters the waste heat boiler from the space between the inner side end of the fixed cylinder 105 and the outer side end of the connecting pipe 11, and ignition difficulty caused by excessive waste heat and waste gas is prevented. After the ignition gun ignites the gas at the front end of the combustion disc 55 of the central burner, an operator turns on the power switch of the servo motor speed reducing mechanism 73 in the reverse direction for a certain time (about 3 seconds), so that the two ends of the transmission rod 77 of the servo motor speed reducing mechanism 73 drive the driving rods 75 at the upper parts of the shaft rods 72 of the two adjacent valve plates 71 to respectively move backwards and forwards for a certain position, each driving rod 75 drives the valve plate 71 to rotate in the reverse direction for a certain angle and return to the initial state, and thus, the minimum distance is reserved between the upper end and the lower end of the valve plate 71 and the inner side of the fixed cylinder 105 and between the outer sides of the connecting pipes 11 again, so that a large amount of waste heat and waste gas flows into the waste heat boiler after being combusted and supported by the central gas.

In the application of the invention, when the gas turbine is stopped, but the waste heat boiler needs heat, and the main gas burner 6 burns poorly or even extinguishes due to lack of combustion oxygen because there is no more waste gas supplied by the waste oxygen, the operator can open the power switch of the electric damper, so that the damper of the electric damper is opened, and the air input by the first external fan enters the shell 1 through the air pipe 8 to provide proper oxygen for the combustion of the central gas burner, thereby ensuring the combustion (when the waste heat gas discharged by the gas turbine is combusted, the power switch of the electric damper is closed, so that the damper of the electric damper is closed, and the waste heat gas is prevented from escaping outwards from the air pipe 8). When the waste heat boiler is used, waste heat and waste gas discharged by the gas turbine can be effectively utilized, and gas can be independently combusted to provide heat for the waste heat boiler when the gas turbine stops working, so that the normal work of the boiler is ensured, and under the combined action of related mechanisms, the final emission temperature of the flue gas (the final temperature is only about 100 ℃) is reduced due to the secondary combustion of the flue gas, the oxygen content of the flue gas and the nitrogen oxide NOx are reduced, and the environmental pollution is reduced on the premise that the heat and the oxygen content of the tail gas of the gas turbine are fully utilized as far as possible.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. 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.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The combustion-supporting combustion device of high-temperature tail gas of the gas turbine comprises 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 shunting mechanism, an air pipe with an electric air door and a flame detector; the front, the rear, the left and the right peripheries of the shell are of an open structure, an access door is arranged on the front side of the shell, and a waste gas connecting pipe is arranged on the left side of the shell; the electric air door air pipe is arranged at the rear side end of the shell; the right side end of the shell is provided with a high-temperature flue gas shunting mechanism; the left end of the shell is also provided with an observation tube; the central gas pipe, the central air pipe and the main gas pipe are respectively arranged at the lower end of the shell; the central gas burner is transversely arranged in the middle of the shell, the main gas burner is transversely arranged in the middle of the shell, and the central gas burner and the high-temperature flue gas shunting mechanism are concentric after being arranged.

2. The combustion-supporting combustion device for high-temperature tail gas of a gas turbine according to claim 1, wherein the shell and the access door are two layers, namely an inner layer and an outer layer, and a heat-insulating material is filled between the two layers.

3. The combustion-supporting combustion device of high-temperature tail gas of a gas turbine as claimed in claim 1, wherein the central gas burner comprises a transverse pipe, an inner pipe and an electric igniter, the inner pipe is transversely installed in the middle of the inner part of the transverse pipe, an igniter guide pipe is arranged in the side end of the transverse pipe, the igniter guide pipe is transversely sleeved in the igniter guide pipe, a combustion disc is arranged at the right side end of the transverse pipe, the transverse pipe is installed in the middle of the shell, an air connecting pipe is arranged at the lower part of the left end of the transverse pipe, the air connecting pipe is connected with the central air pipe through a metal hose, and the.

4. The combustion-supporting combustion device of high-temperature tail gas of a gas turbine as claimed in claim 1, wherein the main gas burner comprises a lower gas pipe, an outer pipe and an annular pipe with an annular opening at the right side end, an annular supporting sleeve plate is arranged outside the right side end of the outer pipe, each outer pipe penetrates through the supporting sleeve plate, a lower combustion disc is mounted on the annular supporting sleeve plate, a nozzle pipe is transversely arranged in each opening of the outer pipe, the upper end of the lower gas pipe is mounted at the lower end of the opening in the lower middle of the annular pipe, three mounting brackets are distributed in the circumferential direction of the annular pipe and connected and fixed with a connecting column inside the shell, the left side of the outer pipe is welded in each opening in the right side of the annular pipe, the right side of the outer pipe is transversely mounted in the annular supporting sleeve plate, and the.

5. The combustion-supporting combustion device for high-temperature tail gas of the gas turbine according to claim 4, wherein the support rod of the central gas burner is tightly sleeved on the connecting column in the shell, and the support rod and the main gas burner are concentrically arranged in the high-temperature flue gas diversion mechanism after being installed.

6. The combustion-supporting combustion device for high-temperature tail gas of a gas turbine as claimed in claim 4, wherein the high-temperature flue gas diversion mechanism comprises movable valve plates, shaft rods, servo motor driving mechanisms, connecting rods, driving rods, fixed cylinders and connecting pipes, a plurality of through holes are annularly distributed on the left side of the fixed cylinder at intervals, a guide seat pipe is arranged at the upper end of each through hole, the movable valve plates, the driving rods and the connecting rods are respectively provided with the same number of the movable valve plates, the shaft rod of each movable valve plate is sleeved in the shaft hole of one of the guide seat pipes, the plurality of the valve plates are positioned between the inner side of the fixed cylinder and the outer side of the connecting pipe, the transversely distributed middle part of each driving rod is arranged at the upper end of each valve plate, the servo motor driving mechanism is arranged on the outer side of the fixed cylinder between the two guide seat pipes, and, the transmission rod and two valve plate driving rods which are annularly distributed and adjacent are hinged together through two connecting rods, the driving rods of the valve plates between every two adjacent valve plates are hinged together through two connecting rods, an opening is formed in the side end of the fixed cylinder body, the flame detector is installed at the outer side end of the opening, and the lens faces the inside of the fixed cylinder body.

Images