Steam turbine dead steam waste heat cascade recovery device coupled with high back pressure and heat pump

Abstract

The invention relates to the technical field of waste heat recovery, in particular to a steam turbine dead steam waste heat cascade recovery device coupling high back pressure and a heat pump, the steam turbine dead steam waste heat cascade recovery device comprises an air inlet frame, a processing frame is slidably arranged on the left side of the air inlet frame, and a motor is fixedly connected to the front side of the air inlet frame. According to the steam turbine dead steam waste heat cascade recovery device coupling the high back pressure and the heat pump, the T-shaped rod on the side face of the air inlet frame is aligned and pushed into the T-shaped groove of the treatment frame, the T-shaped rod and the treatment frame are firmly connected, and meanwhile a dead steam incoming pipe and an inlet of the air inlet frame are connected in a sealed mode. After dead steam enters, the motor is started, a motor shaft drives the L-shaped rod to rotate, and under the limiting effect of the long frame, the cross rod of the L-shaped rod pushes the long frame, the connecting strip connected with the long frame and the long rod to reciprocate left and right in the air inlet frame. The gear fixed to the long rod is meshed with the rack, so that the long rod rotates while horizontally moving, the multiple sets of fan blades are driven to rotate at a high speed, airflow is formed, dead steam is pressed into the treatment frame, the conveying efficiency is improved, and waste of heat energy resources is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat recovery, in particular to a steam turbine exhaust steam waste heat cascade recovery device coupled with high back pressure and heat pump. BACKGROUND

[0002] In the combined heat and power process, the steam turbine, as one of the core devices, plays a key role in converting heat energy into mechanical energy and further generating electricity. During operation, the steam turbine produces a large amount of low-temperature and low-pressure exhaust steam. If directly discharged into the atmosphere, not only a large amount of high-quality water resources will be wasted, but also the overall energy efficiency will be reduced due to the residual heat energy in the exhaust steam not being effectively utilized. At the same time, the direct discharge of high-temperature exhaust steam may cause thermal pollution to the surrounding environment and affect the local ecological balance. In order to efficiently recover this waste energy, an exhaust steam waste heat recovery device has emerged. This device collects and transports the exhaust steam discharged by the steam turbine through a special pipeline system to a heat exchanger, where indirect heat exchange between the exhaust steam and the working medium flowing on the other side occurs, transferring the residual heat contained in the exhaust steam to the working medium. The heated medium can be further used for regional heating, industrial heating, domestic hot water supply, or driving absorption chillers, etc., thereby realizing cascade utilization of energy, improving the overall energy efficiency of the system, reducing carbon emissions, and achieving economic and environmental benefits.

[0003] In the existing process of collecting exhaust steam, it is usually relied on to naturally drift to the side of the heat exchanger to realize heat recovery. However, during the transportation stage, due to factors such as low initial kinetic energy, unreasonable airflow organization, or pipeline layout, part of the exhaust steam may experience increased flow resistance or even stagnation within the device, which leads to incomplete heat exchange process and results in reduced heat recovery efficiency of the device, as well as a large amount of available exhaust steam not being effectively recovered, causing waste of heat energy resources.

[0004] In view of this, we propose a steam turbine exhaust steam waste heat cascade recovery device coupled with high back pressure and heat pump. SUMMARY

[0005] The turbine exhaust steam waste heat cascade recovery device coupled with high back pressure and heat pump is provided, which solves the problems that the flow resistance increases or even stagnates in the device due to the low initial kinetic energy, unreasonable air flow organization or pipeline layout, etc., which leads to the incomplete heat exchange process, the decrease of the heat recovery efficiency of the device, and the waste of heat energy resources.

[0006] Preferably, the moving mechanism comprises a long frame, which is slidingly arranged in the interior of the air inlet frame, the interior of the long frame is slidingly connected with the side surface of the cross bar of the L-shaped rod, the length of the interior of the long frame is twice the length of the L-shaped rod, the front side of the long frame is fixedly connected with a connecting strip, when the L-shaped rod rotates, the long frame can move smoothly left and right in the interior thereof through the limiting effect of the air inlet frame on the long frame, so that the operation stability and coordination of the overall structure are significantly enhanced, the jamming or deviation is avoided, and the reliability and service life of the mechanical transmission are improved.

[0007] Preferably, the interior of the connecting strip is rotatably connected with a long rod, one-way bearings are fixedly sleeved on the front and back sides of the long rod, the side surface of the one-way bearing is fixedly connected with a fan blade, a recess is formed in the rear side of the inner wall of the air inlet frame, a rack is fixedly connected to the lower side of the inner wall of the recess, a gear is fixedly sleeved on the side surface of the long rod, the gear is engaged with the rack, when the long rod drives the gear to move along the rack, the engagement of the gear and the rack converts linear motion into rotary motion, thereby driving the long rod and the one-way bearing thereon to rotate, the fan blade generates directional airflow, the gas flow efficiency in the device is enhanced, and the effective combination of power transmission and airflow control is realized.

[0008] Preferably, the left side of the long frame is fixedly connected with a T-shaped strip, 45° bevel angles are formed in the left and right sides of the bottom of the crossbar of the T-shaped strip, the bottom of the crossbar of the T-shaped strip is slidingly matched with the lower side of the inner wall of the long frame, the T-shaped strip structure with the bevel angle at the bottom is relatively sharp, which can continuously scrape and clean the bottom of the inner wall of the long frame during the sliding process, effectively prevents the accumulation of dust or impurities, keeps the interior unobstructed, reduces the movement resistance, prolongs the service life of the mechanism, and maintains the operation accuracy.

[0009] Preferably, the waste heat recovery mechanism comprises a heat exchanger, a dehumidifier and a phase change heat accumulator, the heat exchanger is fixedly arranged in the lower side of the air outlet cavity, a partition plate is fixedly connected to the middle part of the inner wall of the air outlet cavity, the dehumidifier is arranged on the upper side of the partition plate, a surface cooler is fixedly arranged on the lower side of the partition plate, dehumidification rotors are arranged on the upper and lower sides of the middle part of the side of the partition plate, filter cores are fixedly arranged on the right side of the inner wall of the air outlet cavity, the sides of the two filter cores are fixedly connected to the upper and lower sides of the partition plate, and the phase change heat accumulator is fixedly arranged in the upper side of the air outlet cavity.

[0010] Preferably, support plates are fixedly arranged on the sides of the dehumidification rotors, the sides of the support plates are fixedly connected to the inner wall of the air outlet cavity, the front and rear sides of the right side of each support plate are provided with a 30° chamfer, the chamfer structure of the right side of the support plate can effectively guide the airflow direction, so that the exhaust steam flows more smoothly from the middle part of the support plate to the inside of the dehumidification rotor, the vortex and resistance are reduced, the dehumidification and heat exchange efficiency are improved, and the fluid performance of the structure and the overall stability of the device are enhanced.

[0011] Preferably, protection plates are fixedly connected to the left sides of the inner walls of the air outlet cavities, air outlet pipes are fixedly sleeved on the sides of the protection plates, and flanges are fixedly connected to the left ends of the air outlet pipes, so that the exhaust steam treated by heat exchange can be orderly discharged from the device, and the flanges are designed to facilitate quick and sealed butt joint with external connecting pipelines, which improves the convenience and reliability of installation, ensures the sealing and safety in the medium conveying process, and is beneficial to system integration and subsequent maintenance.

[0012] Preferably, two T-shaped rods are fixedly connected to the left side of the air inlet frame, two T-shaped grooves matched with the T-shaped rods are formed in the left side of the treatment frame, and a support strip is fixedly connected to the right side of the bottom surface of the air inlet frame, so as to provide additional support for the air inlet frame and ensure that the air inlet frame can be stably placed on the ground, the cooperation of the T-shaped rods and the T-shaped grooves makes the connection between the air inlet frame and the treatment frame more convenient and firm, facilitates quick installation and disassembly, improves the overall modular degree and maintenance convenience, and ensures the structural strength of the connection part and the stability in operation.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] In the application, the T-shaped rod of the air inlet frame is aligned and pushed into the T-shaped slot of the processing frame, so that the two are firmly connected, and the exhaust steam pipe is sealedly connected with the inlet of the air inlet frame. After the exhaust steam enters, the motor is started, the motor shaft drives the L-shaped rod to rotate, and under the limiting action of the long frame, the cross rod of the L-shaped rod pushes the long frame and the connecting strip connected therewith to reciprocate left and right in the air inlet frame. The gear fixed on the long rod is engaged with the rack, so that the long rod rotates while moving horizontally, drives a plurality of fan blades to rotate at high speed, forms airflow, and press the exhaust steam into the processing frame, improves the conveying efficiency, and reduces the waste of heat energy resources.

[0015] In the application, after the exhaust steam enters the processing frame, the high-temperature part enters the lower air outlet cavity, flows through the spiral plate heat exchange device, and recovers waste heat through heat exchange, so as to improve the fresh air temperature and the heat recovery rate of the device. The medium-temperature part enters the middle air outlet cavity, is cooled and dehumidified by the surface cooler and the dehumidifier, realizes dry and wet separation, part of the low-temperature waste heat is absorbed and stored by the phase change heat accumulator, can be used for subsequent heating, realizes waste heat cascade utilization, and improves energy efficiency.

[0016] In the application, when the motor drives the L-shaped rod and the long frame to reciprocate, the connected T-shaped strip moves synchronously at the bottom of the air inlet frame. The filter element captures dust and other impurities in the exhaust steam, so that they settle at the bottom, and the T-shaped strip plays a sweeping role to push the impurities to the left and concentrate them. After the operation is completed, the T-shaped rod is pulled out of the T-shaped slot, and the air inlet frame can be removed for cleaning, which is convenient to maintain and is conducive to keeping the device clean. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0018] Figure 2 is an expanded diagram of the three-dimensional structure of the application;

[0019] Figure 3 is a sectional view of the three-dimensional structure of the air inlet frame of the application;

[0020] Figure 4 is a sectional view of the local three-dimensional structure of the air inlet frame of the application;

[0021] Figure 5 is a sectional view of the three-dimensional structure of the processing frame of the application;

[0022] Figure 6 is a sectional view of the local three-dimensional structure of the processing frame of the application;

[0023] Figure 7 is a schematic diagram of the local three-dimensional structure of the dehumidification runner of the application;

[0024] Figure 8 is a schematic diagram of the local three-dimensional structure of the moving mechanism of the application.

[0025] In the figure: 1, air inlet frame; 101, T-shaped rod; 102, T-shaped groove; 103, support strip; 2, processing frame; 3, motor; 4, L-shaped rod; 5, moving mechanism; 501, long frame; 502, connecting strip; 503, long rod; 504, one-way bearing; 505, fan blade; 506, groove; 507, rack; 508, gear; 509, T-shaped strip; 6, air outlet cavity; 601, guard plate; 602, air outlet pipe; 603, flange plate; 7, waste heat recovery mechanism; 701, heat exchanger; 702, dehumidifier; 703, phase change heat accumulator; 704, partition; 705, surface cooler; 706, dehumidification runner; 707, filter core; 708, support plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1 to 8 , the present application provides a technical solution: a steam turbine exhaust steam waste heat cascade recovery device coupled with high back pressure and heat pump, including air inlet frame 1, the left side of air inlet frame 1 is provided with processing frame 2, the front side of air inlet frame 1 is fixedly connected with motor 3, the rear end of the rotating shaft of motor 3 penetrates into the inside of air inlet frame 1 and is fixedly connected with L-shaped rod 4, the side surface of the inner wall of air inlet frame 1 is slidably connected with moving mechanism 5 for conveying hot gas, three air outlet cavities 6 are formed in the inside of processing frame 2, and waste heat recovery mechanism 7 is arranged in the inside of air outlet cavity 6.

[0028] In the embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 , the moving mechanism 5 includes a long frame 501, which is slidably arranged in the inside of the air inlet frame 1. The inside of the long frame 501 is slidably connected with the side surface of the crossbar of the L-shaped rod 4. The length of the inside of the long frame 501 is twice the length of the L-shaped rod 4. The front side of the long frame 501 is fixedly connected with a connecting strip 502. When the L-shaped rod 4 rotates, the long frame 501 can move smoothly left and right in its inside through the limiting action of the air inlet frame 1, so as to significantly enhance the operation stability and coordination of the overall structure, avoid jamming or deviation, and improve the reliability and service life of mechanical transmission.

[0029] In the embodiment, as shown in Figure 1 , Figure 2 , Figure 3 ,Figure 4 、 Figures 5 to 8 As shown in the figure, the inside of the connecting strip 502 is rotatably connected with a long rod 503, the front and back sides of the long rod 503 are fixedly sleeved with one-way bearings 504, the side surfaces of the one-way bearings 504 are fixedly connected with fan blades 505, the rear side of the inner wall of the air inlet frame 1 is provided with a groove 506, the lower side of the inner wall of the groove 506 is fixedly connected with a rack 507, the side surface of the long rod 503 is fixedly sleeved with a gear 508, the gear 508 is engaged with the rack 507, when the long rod 503 drives the gear 508 to move along the rack 507, the engagement of the gear 508 and the rack 507 converts linear motion into rotary motion, and further drives the long rod 503 and the one-way bearings 504 thereon to rotate, and the fan blades 505 thus generate directional airflow, enhancing the gas flow efficiency in the device, realizing effective combination of power transmission and airflow control.

[0030] In this embodiment, as shown in the figure, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 8 As shown in the figure, the left side of the long frame 501 is fixedly connected with a T-shaped strip 509, the left and right sides of the bottom of the horizontal bar of the T-shaped strip 509 are provided with 45° chamfered corners, the bottom of the horizontal bar of the T-shaped strip 509 is in sliding fit with the lower side of the inner wall of the long frame 501, the T-shaped strip 509 with the chamfered corners at the bottom is relatively sharp in structure, which can continuously scrape and clean the bottom of the inner wall of the long frame 501 during sliding, effectively preventing dust or impurities from being retained, keeping the inside unobstructed, reducing the movement resistance, and at the same time prolonging the service life of the mechanism and maintaining the operation accuracy.

[0031] In this embodiment, as shown in the figure, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 8As shown, the waste heat recovery mechanism 7 includes a heat exchanger 701, a dehumidifier 702 and a phase change heat accumulator 703, the heat exchanger 701 is fixedly arranged in the inside of the lower air outlet cavity 6, a partition plate 704 is fixedly connected to the middle of the inner wall of the middle air outlet cavity 6, the dehumidifier 702 is arranged on the upper side of the partition plate 704, a surface cooler 705 is fixedly arranged on the lower side of the partition plate 704, dehumidification rotary wheels 706 are arranged on the upper and lower sides of the middle of the side of the partition plate 704, filter cores 707 are fixedly arranged on the right side of the inner wall of the middle air outlet cavity 6, the sides of the two filter cores 707 are fixedly connected to the upper and lower sides of the partition plate 704, and the phase change heat accumulator 703 is fixedly arranged in the inside of the upper air outlet cavity 6. The heat exchanger 701 can adopt a spiral plate type heat exchange device to recover high temperature sensible heat, preheat fresh air with high temperature waste heat, improve the temperature of the fresh air and increase the heat recovery rate. At the same time, the dehumidification rotary wheels 706 can recover latent heat in evaporated water, thereby reducing the energy consumption of dehumidification, improving the drying efficiency, and using the phase change heat accumulator 703 to store low temperature waste heat, thereby providing heating for staff dormitories and the like, thereby realizing heat energy utilization.

[0032] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 8 As shown, the side of the dehumidification rotary wheel 706 is fixedly provided with a support plate 708, the side of the support plate 708 is fixedly connected to the inside of the middle air outlet cavity 6, the front and rear sides of the right side of the support plate 708 are provided with a 30° chamfer, and the chamfer structure of the right side of the support plate 708 can effectively guide the airflow direction, so that the exhaust steam flows more smoothly from the middle of the support plate 708 to the inside of the dehumidification rotary wheel 706, reduces the vortex and resistance, improves the dehumidification and heat exchange efficiency, and enhances the fluid performance of the structure and the overall stability of the device.

[0033] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 8 As shown, the left side of the inner wall of the air outlet cavity 6 is fixedly connected with a protection plate 601, the side of the protection plate 601 is fixedly sleeved with an air outlet pipe 602, the left end of the air outlet pipe 602 is fixedly connected with a flange plate 603, the air outlet pipe 602 facilitates the orderly discharge of the exhaust steam after heat exchange treatment, and the flange plate 603 facilitates quick and sealed butt joint with the external connecting pipeline, which improves the convenience and reliability of installation, ensures the sealing and safety in the medium conveying process, and is conducive to system integration and subsequent maintenance.

[0034] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,Figures 5 to 8 As shown, the left side of the air inlet frame 1 is fixedly connected with two T-shaped rods 101, the left side of the processing frame 2 is provided with two T-shaped grooves 102 matched with the T-shaped rods 101, and the right side of the bottom surface of the air inlet frame 1 is fixedly connected with a supporting strip 103, which provides additional support for the air inlet frame 1 to ensure that it can be stably placed on the ground; the cooperation of the T-shaped rods 101 and the T-shaped grooves 102 makes the connection between the air inlet frame 1 and the processing frame 2 more convenient and firm, facilitates quick installation and disassembly, improves the overall modular degree and maintenance convenience, and at the same time ensures the structural strength of the connection part and the stability in operation.

[0035] The use method and advantages of the application are as follows:

[0036] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 , Figure 1 , Figure 2 , Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Firstly, the T-shaped rods 101 on the side of the air inlet frame 1 are aligned and pushed into the T-shaped grooves 102 on the processing frame 2, so that the air inlet frame 1 is firmly connected with the processing frame 2, and the exhaust steam inlet pipe is sealingly connected with the inlet of the air inlet frame 1; when the exhaust steam starts to enter the air inlet frame 1, the motor 3 is started, and the rotating shaft of the motor 3 drives the L-shaped rod 4 on the side to start rotating; under the limiting action of the air inlet frame 1 structure on the long frame 501, the cross bar of the L-shaped rod 4 slides in the long frame 501, thereby driving the long frame 501 and the connecting strip 502 and the long rod 503 rigidly connected on the left side of the long frame 501 to move left and right in the air inlet frame 1; at this time, the gear 508 fixed on the side of the long rod 503 is engaged with the rack 507 installed on the inner wall of the air inlet frame 1, so that the long rod 503 rotates while moving horizontally, and further drives the multiple groups of fan blades 505 on it to rotate at high speed, forming an air flow to forcibly press the exhaust steam in the air inlet frame 1 into the processing frame 2, thereby significantly improving the exhaust steam delivery efficiency and reducing the residence and waste of high-temperature medium;

[0037] When the exhaust steam enters the processing frame 2, the exhaust steam with the highest temperature first enters the lower exhaust cavity 6, flows through the built-in spiral plate heat exchange device, and realizes the recovery of high-temperature waste heat through efficient heat exchange with fresh air, thereby effectively improving the fresh air temperature and the total heat recovery rate of the device; the exhaust steam with moderate temperature enters the middle exhaust cavity 6, is cooled and dehumidified by the surface cooler 705 and the dehumidifier 702, realizes the separation and discharge of dry and wet air, and part of the low-temperature waste heat is absorbed and stored by the phase change heat accumulator 703, which can be used for subsequent heating of the staff dormitory, thereby forming a perfect waste heat cascade utilization, and greatly improving the comprehensive energy utilization efficiency.

[0038] In the process of driving the L-shaped rod 4 and the long frame 501 to move left and right reciprocatingly by the motor 3, the T-shaped strip 509 connected with the long frame 501 also moves synchronously at the bottom of the air inlet frame 1. The filter core 707 arranged in the air inlet frame 1 can capture the dust and other impurities mixed in the exhaust steam, so that it is settled at the bottom of the inner wall of the air inlet frame 1 and the processing frame 2. The T-shaped strip 509 reciprocatingly plays a role of scraping, continuously pushes the impurities to the left and concentrates them in the left area. After the operation is completed, the T-shaped rod 101 of the air inlet frame 1 is pulled out from the T-shaped groove 102 of the processing frame 2, the air inlet frame 1 can be disassembled, and the impurities accumulated in the air inlet frame 1 and the filter parts can be thoroughly cleaned. The design is not only convenient to maintain, but also helps to keep the inside of the device clean and avoid bacterial growth.

[0039] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A steam turbine exhaust steam waste heat cascade recovery device coupled with high back pressure and heat pump, comprising an air inlet frame (1), a processing frame (2) is slidably arranged on the left side of the air inlet frame (1), characterized in that: The front side of the air inlet frame (1) is fixedly connected with a motor (3), the rear end of the rotating shaft of the motor (3) penetrates into the inside of the air inlet frame (1) and is fixedly connected with an L-shaped rod (4), the side surface of the inner wall of the air inlet frame (1) is slidably connected with a moving mechanism (5) for conveying hot air, and the inside of the processing frame (2) is provided with three air outlet cavities (6), and the inside of the air outlet cavity (6) is provided with a waste heat recovery mechanism (7).

2. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 1, characterized in that: The moving mechanism (5) comprises a long frame (501), the long frame (501) is slidably arranged in the inside of the air inlet frame (1), the inside of the long frame (501) is slidably connected with the side surface of the cross rod of the L-shaped rod (4), the length of the inside of the long frame (501) is twice the length of the L-shaped rod (4), and the front side of the long frame (501) is fixedly connected with a connecting strip (502).

3. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 2, characterized in that: The inside of the connecting strip (502) is rotatably connected with an elongated rod (503), the front and rear sides of the elongated rod (503) are fixedly sleeved with one-way bearings (504), the side surface of the one-way bearing (504) is fixedly connected with a fan blade (505), the rear side of the inner wall of the air inlet frame (1) is provided with a groove (506), the lower side of the inner wall of the groove (506) is fixedly connected with a rack (507), the side surface of the elongated rod (503) is fixedly sleeved with a gear (508), and the gear (508) is meshed with the rack (507).

4. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 3, characterized in that: The left side of the long frame (501) is fixedly connected with a T-shaped strip (509), the left and right sides of the bottom of the cross bar of the T-shaped strip (509) are provided with 45° chamfered angles, and the bottom of the cross bar of the T-shaped strip (509) is slidably matched with the lower side of the inner wall of the long frame (501).

5. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 1, characterized in that: The waste heat recovery mechanism (7) comprises a heat exchanger (701), a dehumidifier (702) and a phase change heat accumulator (703), the heat exchanger (701) is fixedly arranged in the inside of the air outlet cavity (6) located at the lower side, a partition plate (704) is fixedly connected to the middle part of the inner wall of the air outlet cavity (6) located at the middle part, the dehumidifier (702) is arranged on the upper side of the partition plate (704), a surface cooler (705) is fixedly arranged on the lower side of the partition plate (704), dehumidification rotating wheels (706) are arranged on the upper and lower sides of the middle part of the side surface of the partition plate (704), filter elements (707) are fixedly arranged on the right side of the inner wall of the air outlet cavity (6) located at the middle part, the side surfaces of the two filter elements (707) are fixedly connected with the upper and lower sides of the partition plate (704) respectively, and the phase change heat accumulator (703) is fixedly arranged in the inside of the air outlet cavity (6) located at the upper side.

6. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 5, characterized in that: The side surface of the dehumidification rotating wheel (706) is fixedly provided with a supporting plate (708), the side surface of the supporting plate (708) is fixedly connected with the inside of the air outlet cavity (6) located at the middle part, and the left and right sides of the front and rear sides of the right side of the supporting plate (708) are provided with 30° chamfered angles.

7. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 1, characterized in that: The left side of the inner wall of the air outlet cavity (6) is fixedly connected with a protection plate (601), the side surface of the protection plate (601) is fixedly sleeved with an air outlet pipe (602), and the left end of the air outlet pipe (602) is fixedly connected with a flange plate (603).

8. The device for recovering steam turbine exhaust heat in stages, coupling high back pressure and heat pump according to claim 1, characterized in that: The left side of the air inlet frame (1) is fixedly connected with two T-shaped rods (101), the left side of the processing frame (2) is provided with two T-shaped grooves (102) matched with the T-shaped rods (101), and the bottom right side of the air inlet frame (1) is fixedly connected with a supporting strip (103).

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