Flue gas waste heat recovery device of gas generator set

Abstract

The utility model provides a flue gas waste heat recovery device of a gas generator set, which comprises a flue gas waste heat recovery chamber, a smoke guide cylinder is arranged at a smoke inlet of the flue gas waste heat recovery chamber, and a filtering and cleaning mechanism for filtering and cleaning particulate matters in flue gas is arranged in the smoke guide cylinder. The filtering and cleaning mechanism comprises a filtering assembly and a cleaning assembly, wherein the filtering assembly is communicated with a smoke inlet of the smoke waste heat recovery cavity and used for filtering particles in smoke, and the cleaning assembly is used for cleaning particles blocked on the filtering assembly. According to the flue gas waste heat recovery device, particle impurities in flue gas entering the waste heat recovery chamber can be filtered and cleaned through the filtering and cleaning mechanism from the exhaust port of the flue gas generation device to the flue gas inlet of the flue gas waste heat recovery chamber, the particle impurities are prevented from entering an activated carbon adsorption layer to cause accumulation, and the good adsorption performance and efficiency of activated carbon are guaranteed; activated carbon does not need to be replaced frequently, and operation is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery equipment, in particular to a flue gas waste heat recovery device for a gas generator set. Background Art

[0002] A gas generator set is a device that uses gas as fuel to generate electricity. Gas can come from natural gas, coke oven gas, methane and other gases. The working principle of a gas generator set is to use the combustion of gas to generate high-temperature and high-pressure gas, which drives the generator to rotate and generate electricity.

[0003] During the combustion process of coal gas, high-temperature hot gas is generated. There is a large amount of heat in the high-temperature flue gas. If it is directly discharged, a large amount of energy will be wasted. Therefore, in order to save resources, flue gas waste heat recovery equipment is usually used to recycle the heat in the flue gas.

[0004] The Chinese utility model patent with authorization announcement number: CN202223282197.1 discloses a flue gas waste heat recovery device, which aims to solve the problems of low heat exchange rate and heat waste in the existing flue gas waste heat recovery device. The utility model includes a smoke chamber, and the two ends of the smoke chamber are respectively provided with an air inlet and an air outlet. The smoke chamber is outer-mounted with a medium chamber one, and the medium chamber one is provided with an inlet and an outlet. A heat exchange pipeline is arranged in the smoke chamber, and both ends of the heat exchange pipeline are connected to the medium chamber one.

[0005] The applicant believes that the above patent has the following problems: Under normal circumstances, flue gas not only carries a large amount of heat, but also carries a lot of smoke dust. If the smoke dust is only directly adsorbed by activated carbon, the large particles in the smoke dust will accumulate in the activated carbon layer, resulting in poor adsorption performance of the activated carbon, which greatly reduces the adsorption efficiency of the activated carbon and requires frequent replacement of the activated carbon, which is troublesome to operate. Utility Model Content

[0006] In view of this, the utility model provides a flue gas waste heat recovery device for a gas generator set, which can filter and clean the particulate impurities in the flue gas entering the waste heat recovery chamber through a filtering and cleaning mechanism from the exhaust port of the flue gas generating device to the smoke inlet of the flue gas waste heat recovery chamber, thereby preventing the particulate impurities from entering the activated carbon adsorption layer and causing accumulation, thereby ensuring the good adsorption performance and efficiency of the activated carbon, eliminating the need for frequent replacement of the activated carbon, and making the operation simpler and more convenient.

[0007] In order to solve the above technical problems, the utility model provides a flue gas waste heat recovery device for a gas-fired power generation unit, comprising a flue gas waste heat recovery chamber, a flow coil for a medium to be heated up is arranged in the flue gas waste heat recovery chamber, an activated carbon adsorption chamber for absorbing harmful substances in the flue gas is arranged at the smoke exhaust port of the flue gas waste heat recovery chamber, a smoke guide tube is arranged at the smoke inlet of the flue gas waste heat recovery chamber, a filtering and cleaning mechanism for filtering and cleaning particulate matter in the flue gas is arranged in the smoke guide tube, the filtering and cleaning mechanism comprises a filter component for filtering particles in the flue gas which is connected to the smoke inlet of the flue gas waste heat recovery chamber and a cleaning component for cleaning particles blocked on the filter component, the utility model can filter and clean particulate impurities in the flue gas entering the waste heat recovery chamber through the filtering and cleaning mechanism from the exhaust port of the flue gas generating device to the smoke inlet of the flue gas waste heat recovery chamber, avoid the particulate impurities entering the activated carbon adsorption layer and causing accumulation, ensure the good adsorption performance and efficiency of the activated carbon, do not need to frequently replace the activated carbon, and the operation is simpler and more convenient.

[0008] The smoke exhaust port of the smoke guide is connected to the smoke inlet of the smoke waste heat recovery chamber, and the air inlet of the smoke guide is connected to the exhaust port of the smoke generating device. The smoke guide includes a guide part, a filter part and a debris removal part which are sequentially arranged between the exhaust port of the smoke generating device and the smoke inlet of the smoke waste heat recovery chamber. The utility model can guide the smoke and particles through the guide part inside the smoke guide, filter out the particles in the smoke through the filtering effect of the filter part, and then collect the filtered smoke through the debris removal part. The purity of the flue gas entering the flue gas waste heat recovery chamber is greatly improved, and particles are prevented from entering the flue gas waste heat recovery chamber and the activated carbon adsorption chamber along with the flue gas. The particles hit the circulation coil, affecting the service life of the pipeline in the flue gas waste heat recovery chamber. The particles adhere to the surface of the activated carbon, reducing the adsorption capacity of the activated carbon in the activated carbon adsorption chamber. The inner wall of the guide part can be made into a hollow structure, and a medium passing tube is arranged above the inner wall of the hollow structure of the guide part to pass the medium to be heated, which greatly improves the recovery efficiency of the flue gas waste heat.

[0009] The filter assembly includes a filter cartridge arranged inside the filter part, and filter holes are arranged on the outer wall of the filter cartridge. The filter cartridge is a truncated cone structure with an upper opening smaller than a lower opening. The purpose of this is to increase the filtering area for particles in the smoke, with higher filtering efficiency and better effect.

[0010] The cleaning component includes a through groove located on the outer wall of the filter part, a sealing gasket is arranged inside the through groove, and the sealing gasket should be made of a rubber material with a certain recovery elasticity and anti-slip, wear-resistant and high-temperature resistant properties, a fixing frame on the side where the through groove is located and arranged on the outer wall of the guide part, a telescopic push rod is arranged on the fixing frame, a through hole adapted to the output rod of the telescopic push rod is opened on the fixing frame, the output rod of the telescopic push rod passes through the through hole, the fixed end of the telescopic push rod is fixed on the outer wall of the fixing frame, the telescopic push rod is an electric telescopic rod or a hydraulic telescopic rod, and the end of the output rod of the telescopic push rod is provided with a A receiving plate with the same inner diameter as the guide portion is provided, a rubber pad is provided between the receiving plate and the sealing pad, the impurity removal portion is connected with the exhaust port of the filter portion, an air outlet is provided on the outer wall of the impurity removal portion and above the filter cartridge, a hair dryer is provided on the air outlet, the housing of the hair dryer is fixed on the fixing frame, the fixing frame is welded on the outer wall of the filter portion, the air outlet of the hair dryer is connected with the air outlet through a pipe, the other end of the pipe is inclined downward and penetrates into the upper part of the filter cartridge inside the impurity removal portion, A temperature sensor is arranged inside the part. When the temperature inside the smoke guide tube rises to the warning temperature, while the temperature inside the impurity removal part drops instead of rising, it indicates that the filter mesh holes of the filter cartridge have been blocked. At this time, the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber are closed at the same time. Then, the output rod of the telescopic push rod is started to extend to the bottom of the filter cartridge that pushes the receiving plate into the filter part (because the sealing gasket is made of rubber and has a certain recovery elasticity, after the receiving barrel enters the filter cartridge, the sealing gasket is compressed, and at the same time, the outer wall of the receiving barrel and the through groove are in contact with each other. At the same time, open the blower and the switch valve on the pipeline. At this time, the blower will generate wind force to enter the upper part of the filter cartridge to blow the blocked particles in the filter cartridge to the receiving tray for collection. After the collection is completed, start the output rod of the telescopic push rod to retract to pull the receiving tray and the sealing gasket to re-seal the through groove. Then, the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber can be opened, and the switch valve on the pipeline can be closed to continue the smoke waste heat recovery operation. The operation is more convenient and efficient.

[0011] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0012] 1. The utility model can filter and clean the particulate impurities in the flue gas entering the waste heat recovery chamber through a filtering and cleaning mechanism from the exhaust port of the flue gas generating device to the smoke inlet of the flue gas waste heat recovery chamber, thereby preventing the particulate impurities from entering the activated carbon adsorption layer and causing accumulation, thereby ensuring the good adsorption performance and efficiency of the activated carbon, eliminating the need for frequent replacement of the activated carbon, and making the operation simpler and more convenient.

[0013] 2. The utility model can guide the flue gas and particles through the guide part inside the smoke guide tube, and filter out the particles in the flue gas through the filtering effect of the filtering part, and then collect the filtered flue gas through the impurity removal part, thereby greatly improving the purity of the flue gas entering the flue gas waste heat recovery chamber, and preventing particles from entering the flue gas waste heat recovery chamber and the activated carbon adsorption chamber with the flue gas, and preventing the particles from hitting the circulation coil and affecting the service life of the pipeline in the flue gas waste heat recovery chamber. The particles adhere to the surface of the activated carbon and reduce the adsorption capacity of the activated carbon in the activated carbon adsorption chamber. The inner wall of the guide part can be made into a hollow structure, and a medium passing tube is arranged above the inner wall of the hollow structure of the guide part to pass the medium to be heated, thereby greatly improving the recovery efficiency of the flue gas waste heat.

[0014] 3. The filter cartridge is a truncated cone structure with an upper opening smaller than a lower opening. The purpose of this is to increase the filtering area for particles in the flue gas, resulting in higher filtering efficiency and better results.

[0015] 4. The utility model can set temperature sensors inside the guide part and the impurity removal part. When the temperature in the smoke guide tube rises to the warning temperature, but the temperature in the impurity removal part drops instead of rising, it means that the filter mesh holes of the filter cartridge have been blocked. At this time, the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber are closed at the same time, and then the output rod of the telescopic push rod is started to extend to the bottom of the filter cartridge that pushes the receiving plate into the filter part (because the sealing gasket is made of rubber and has a certain recovery elasticity, after the receiving barrel enters the filter cartridge, the sealing gasket is compressed and the receiving barrel enters the filter cartridge at the same time). At the same time, the outer wall of the receiving barrel is fitted with the through groove to seal it, and the hair dryer and the switch valve on the pipeline are opened. At this time, the hair dryer will generate wind force to enter the upper part of the filter cartridge to blow the blocked particles in the filter cartridge to the receiving tray to be collected. After the collection is completed, the output rod of the telescopic push rod is started to retract to pull the receiving tray and the sealing gasket to re-seal the through groove, and then the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber can be opened, and the switch valve on the pipeline can be closed to continue the smoke waste heat recovery operation, which is more convenient and efficient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model of the flue gas waste heat recovery device of the gas generator set;

[0017] Figure 2 It is a top view of the flue gas waste heat recovery device of the utility model of the gas generator set;

[0018] Figure 3 This is a cross-sectional view of the utility model taken along line AA;

[0019] Figure 4It is an enlarged view of point B of the present utility model.

[0020] Explanation of reference numerals: 100, smoke guide tube; 101, guide part; 102, filter part; 103, impurity removal part; 200, filter cleaning mechanism; 210, filter assembly; 211, filter cartridge; 212, filter hole; 220, cleaning assembly; 221, through groove; 222, sealing gasket; 223, fixing frame; 224, telescopic push rod; 225, receiving tray; 226, rubber pad. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1-4 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0022] like Figure 1-4 As shown: This embodiment provides a flue gas waste heat recovery device for a gas-fired power generation unit, including a flue gas waste heat recovery chamber, a flow coil for a medium to be heated to pass through is arranged in the flue gas waste heat recovery chamber, an activated carbon adsorption chamber for absorbing harmful substances in the flue gas is arranged at the smoke exhaust port of the flue gas waste heat recovery chamber, a smoke guide 100 is arranged at the smoke inlet of the flue gas waste heat recovery chamber, a filtering and cleaning mechanism 200 for filtering and cleaning particulate matter in the flue gas is arranged in the smoke guide 100, and the filtering and cleaning mechanism 200 includes a filter connected to the flue gas waste heat recovery chamber The filter assembly 210 for filtering particles in the flue gas and the cleaning assembly 220 for cleaning particles blocked on the filter assembly 210 are connected to the smoke inlet of the chamber. The utility model can filter and clean the particulate impurities in the flue gas entering the waste heat recovery chamber through the filter cleaning mechanism 200 from the exhaust port of the smoke generating device to the smoke inlet of the flue gas waste heat recovery chamber, so as to avoid the particulate impurities entering the activated carbon adsorption layer and causing accumulation, thereby ensuring the good adsorption performance and efficiency of the activated carbon, eliminating the need for frequent replacement of the activated carbon, and making the operation simpler and more convenient.

[0023] According to one embodiment of the utility model, Figure 1-4As shown, the smoke exhaust port of the smoke guide 100 is connected to the smoke inlet of the smoke waste heat recovery chamber, and the air inlet of the smoke guide 100 is connected to the exhaust port of the smoke generating device. The smoke guide 100 includes a guide part 101, a filter part 102 and a dust removal part 103 which are sequentially arranged from the exhaust port of the smoke generating device to the smoke inlet of the smoke waste heat recovery chamber. The utility model can guide the smoke and particles through the guide part 101 inside the smoke guide 100, and filter out the particles in the smoke through the filtering effect of the filter part 102, and then remove the particles through the dust removal part 103. The filtered flue gas is collected, which greatly improves the purity of the flue gas entering the flue gas waste heat recovery chamber, and prevents particles from entering the flue gas waste heat recovery chamber and the activated carbon adsorption chamber along with the flue gas. The particles hit the circulation coil, affecting the service life of the pipeline in the flue gas waste heat recovery chamber. The particles adhere to the surface of the activated carbon, reducing the adsorption capacity of the activated carbon in the activated carbon adsorption chamber. The inner wall of the guide part 101 can be made into a hollow structure, and a medium passing tube is arranged above the inner wall of the hollow structure of the guide part 101 to pass the medium to be heated, which greatly improves the recovery efficiency of the flue gas waste heat.

[0024] According to another embodiment of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the filter assembly 210 includes a filter cartridge 211 disposed inside the filter portion 102, and a filter hole 212 is disposed on the outer wall of the filter cartridge 211. The filter cartridge 211 is a truncated cone structure with an upper opening smaller than a lower opening. This is for the purpose of increasing the filtering area for particles in the smoke, resulting in higher filtering efficiency and better effects.

[0025] According to another embodiment of the present invention, Figure 1 and Figure 3As shown, the cleaning component 220 includes a through groove 221 located on the outer wall of the filter part 102, a sealing gasket 222 is arranged inside the through groove 221, and the sealing gasket 222 should be made of a rubber material with a certain recovery elasticity that is non-slip, wear-resistant, and high-temperature resistant. A fixing frame 223 is arranged on the outer wall of the guide part 101 on the side where the through groove 221 is located, and a telescopic push rod 224 is arranged on the fixing frame 223. A through hole that is compatible with the output rod of the telescopic push rod 224 is opened on the fixing frame 223, and the output rod of the telescopic push rod 224 passes through the through hole. The fixed end of the telescopic push rod 224 is fixed on the outer wall of the fixing frame 223, and the telescopic push rod 224 is an electric telescopic rod or a hydraulic The telescopic rod and the output rod end of the telescopic push rod 224 are provided with a receiving plate 225 with the same inner diameter as the guide part 101, and a rubber pad 226 is provided between the receiving plate 225 and the sealing pad 222. The impurity removal part 103 is connected with the exhaust port of the filter part 102, and a blowing port is provided on the outer wall of the impurity removal part 103 and above the filter cartridge 211, and a hair dryer is provided on the blowing port. The shell of the hair dryer is fixed on the fixing frame 223, and the fixing frame 223 is welded on the outer wall of the filter part 102. The air outlet of the hair dryer is connected with the blowing port through a pipe, and the other end of the pipe is inclined downward to penetrate into the upper part of the filter cartridge 211 inside the impurity removal part 103. In the present invention, temperature sensors can be arranged inside the guide part 101 and inside the impurity removal part 103. When the temperature inside the smoke guide tube 100 rises to the warning temperature, but the temperature inside the impurity removal part 103 drops instead of rising, it indicates that the filter mesh holes of the filter cartridge 211 have been blocked. At this time, the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber are closed at the same time, and then the output rod of the telescopic push rod 224 is started to extend to the bottom of the filter cartridge 211 that pushes the receiving plate 225 into the filter part 102 (because the sealing pad 222 is made of rubber and has a certain restoring elasticity, therefore, after the receiving barrel enters the filter cartridge 211, the sealing The pad 222 is compressed, and at the same time, the outer wall of the receiving barrel fits with the through groove 221 to seal it), and at the same time, the hair dryer and the switch valve on the pipeline are opened. At this time, the hair dryer will generate wind force to enter the upper part of the filter cartridge 211, and blow the blocked particles in the filter cartridge 211 to the receiving tray to be collected. After the collection is completed, the output rod of the telescopic push rod 224 is started to retract to pull the receiving tray and the sealing pad 222 to re-seal the through groove 221, and then the exhaust port of the smoke generating device and the switch control valve of the smoke inlet of the smoke waste heat recovery chamber can be opened, and the switch valve on the pipeline can be closed to continue the smoke waste heat recovery operation, and the operation is more convenient and efficient.

[0026] The use of the utility model:

[0027] First of all, it should be made clear that the waste heat recovery device involved in the utility model is mainly used to filter the particles of the flue gas with particles and recover and reuse the waste heat of the flue gas. The utility model takes the waste heat recovery of the flue gas of a gas-fired power generation unit as an example to explain its use method in detail. When it is necessary to recover the waste heat of the flue gas, open the switch control valves at the exhaust port of the flue gas generating device and the smoke inlet of the flue gas waste heat recovery chamber, and close the switch valve on the pipeline. At this time, the high-temperature flue gas with particles from the flue gas generating device will enter the filter unit 102, and the filter in the filter unit 102 will be The filter holes on the cylinder 211 will block the particles in the flue gas, and the screened flue gas will pass through the impurity removal part 103 and enter the activated carbon adsorption layer to be adsorbed and then discharged. When the temperature in the smoke guide cylinder 100 rises to the warning temperature, and the temperature in the impurity removal part 103 does not rise but decreases, it means that the filter holes of the filter cylinder 211 have been blocked. At this time, the switch control valves of the exhaust port of the smoke generating device and the smoke inlet of the flue gas waste heat recovery chamber are closed at the same time, and then the output rod of the telescopic push rod 224 is started to extend to the bottom of the filter cylinder 211 that pushes the receiving plate 225 into the filter part 102 (Since the sealing gasket 222 is made of rubber and has a certain degree of restoring elasticity, after the receiving barrel enters the filter cartridge 211, the sealing gasket 222 is compressed, and at the same time, the outer wall of the receiving barrel fits with the through groove 221 to seal it), the hair dryer and the switch valve on the pipeline are turned on at the same time. At this time, the hair dryer will generate wind force to enter the upper part of the filter cartridge 211, and blow the blocked particles in the filter cartridge 211 into the receiving tray to be collected. After the collection is completed, the output rod of the telescopic push rod 224 is started to retract to pull the receiving tray and the sealing gasket 222 to re-align with the through groove 221. Sealing operation is performed. During this process, the medium in the smoke guide 100 will cool down the high-temperature combustion gas through the medium to be heated in the tube, thereby realizing the recovery of waste heat in the flue gas. The utility model can filter and clean particulate impurities in the flue gas entering the waste heat recovery chamber through the filtering and cleaning mechanism 200 from the exhaust port of the flue gas generating device to the smoke inlet of the flue gas waste heat recovery chamber, thereby preventing the particulate impurities from entering the activated carbon adsorption layer and causing accumulation, thereby ensuring good adsorption performance and efficiency of the activated carbon, without the need to frequently replace the activated carbon, and making the operation simpler and more convenient.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A flue gas waste heat recovery device for a gas-fired power generation unit, comprising a flue gas waste heat recovery chamber, a flow coil for a medium to be heated to pass through the flue gas waste heat recovery chamber, and an activated carbon adsorption chamber for absorbing harmful substances in the flue gas at a smoke exhaust port of the flue gas waste heat recovery chamber, characterized in that: A smoke guide tube (100) is arranged at the smoke inlet of the smoke waste heat recovery chamber, and a filtering and cleaning mechanism (200) for filtering and cleaning particulate matter in the smoke is arranged in the smoke guide tube (100). The filtering and cleaning mechanism (200) comprises a filtering component (210) connected to the smoke inlet of the smoke waste heat recovery chamber for filtering particles in the smoke, and a cleaning component (220) for cleaning particles blocked on the filtering component (210).

2. The flue gas waste heat recovery device for a gas-fired power generation unit according to claim 1, characterized in that: The smoke exhaust port of the smoke guide (100) is connected to the smoke inlet of the smoke waste heat recovery chamber, and the air inlet of the smoke guide (100) is connected to the exhaust port of the smoke generating device. The smoke guide (100) comprises a guide part (101), a filter part (102) and a debris removal part (103) which are sequentially arranged from the exhaust port of the smoke generating device to the smoke inlet of the smoke waste heat recovery chamber.

3. The flue gas waste heat recovery device for a gas-fired power generation unit according to claim 2, characterized in that: The filter assembly (210) comprises a filter cartridge (211) arranged inside the filter portion (102), and a filter hole (212) is arranged on the outer wall of the filter cartridge (211).

4. The flue gas waste heat recovery device for a gas-fired power generation unit according to claim 3, characterized in that: The cleaning assembly (220) comprises a through groove (221) located on the outer wall of the filter portion (102), a sealing gasket (222) being arranged inside the through groove (221), a fixing frame (223) being arranged on the outer wall of the guide portion (101) on the side where the through groove (221) is located, a telescopic push rod (224) being arranged on the fixing frame (223), and a receiving plate (225) having the same inner diameter as the guide portion (101) being arranged at the output rod end of the telescopic push rod (224). ), a rubber pad (226) is provided between the receiving plate (225) and the sealing pad (222), the impurity removal section (103) is communicated with the exhaust port of the filter section (102), an air outlet is provided on the outer wall of the impurity removal section (103) and located above the filter cartridge (211), a hair dryer is provided on the air outlet, the air outlet of the hair dryer is communicated with the air outlet through a pipe, and the other end of the pipe is obliquely penetrated downward to enter the upper part of the filter cartridge (211) inside the impurity removal section (103).

5. The flue gas waste heat recovery device for a gas-fired power generation unit according to claim 4, characterized in that: The telescopic push rod (224) is an electric telescopic rod or a hydraulic telescopic rod.

6. The flue gas waste heat recovery device for a gas-fired power generation unit according to claim 5, characterized in that: The fixing frame (223) is provided with a through hole matched with the output rod of the telescopic push rod (224), the output rod of the telescopic push rod (224) passes through the through hole, and the fixed end of the telescopic push rod (224) is fixed on the outer side wall of the fixing frame (223).

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