A gas turbine enhanced waste heat power generation device

Abstract

The application discloses a kind of gas turbine enhanced waste heat power generation device, including waste heat boiler body, steam-water circulation loop, flue gas flow circulation loop, waste heat boiler body is provided with fin heat exchanger, including dust removal ash removal loop, collaborative control unit, the collaborative control unit is respectively connected with steam-water circulation loop, flue gas flow circulation loop, dust removal ash removal loop electric signal;The dust removal ash removal loop includes lifting mechanism, support, the support is surrounded in fin heat exchanger outer and is driven up and down reciprocating movement by lifting mechanism, support inside one side is equipped with steam purging component, other side is equipped with corresponding negative pressure ash removal component, steam purging component is blown to fin heat exchanger and is blown to negative pressure ash removal component with dust, negative pressure ash removal component is discharged with dust negative pressure.The application provides a kind of gas turbine enhanced waste heat power generation device of realization multi-loop integration, efficient dust removal, stable operation.

Description

Technical Field

[0001] This invention relates to the field of combined cycle gas turbine waste heat utilization technology, and in particular to a gas turbine waste heat power generation device that integrates steam-water circulation, flue gas flow, online ash removal and intelligent collaborative control. Background Technology

[0002] Combined cycle gas turbine, steam turbine, and waste heat boiler is a core form of efficient energy conversion. The gas turbine burns fuel to drive a generator, and the high-temperature flue gas discharged from the combustion chamber undergoes heat exchange in the waste heat boiler through a steam-water circulation loop to recover waste heat. The condensate is converted into steam, which then enters the steam turbine to drive another (or coaxial) generator to generate electricity. After the steam has completed its work, it is cooled back into water and returned to the waste heat boiler for further circulation. To enhance the heat exchange effect of the waste heat boiler, its heat exchanger tube bundles generally adopt a finned structure. However, in actual operation, there are... The following are common technical defects: the heat exchange efficiency of the loop continues to decline, fly ash in the flue gas is easy to deposit in the gap between the fins, which greatly increases the thermal resistance, resulting in fluctuations in the steam production and steam temperature / pressure of the steam-water loop, increased flow resistance in the flue gas loop, increased back pressure of the gas turbine, reduced overall efficiency of the combined cycle, and complete disconnection between the soot removal and the loop system. Existing steam soot blowing devices are either independently external or set in a fixed position in the furnace, with fixed blowing positions and angles, resulting in a large number of blowing dead corners. The soot removal process disturbs the flue gas flow field, and the removed fly ash is easy to be re-flyed and redeposited, making it impossible to operate in coordination with the steam-water / flue gas loop.

[0003] To address the aforementioned problems, this invention proposes an enhanced waste heat power generation device for gas turbines, which achieves multi-loop integrated operation and improves the heat exchange efficiency of finned heat exchangers, thereby enhancing the waste heat power generation efficiency of gas turbines. Summary of the Invention

[0004] The purpose of this invention is to provide a gas turbine enhanced waste heat power generation device that enables intelligent and coordinated control of steam-water circulation, flue gas flow, and online ash removal and discharge, achieving multi-loop integrated operation, efficient ash removal, and stable operation, thus overcoming the shortcomings of existing technologies.

[0005] This invention provides the following technical solution: a gas turbine enhanced waste heat power generation device, comprising a waste heat boiler body, a steam-water circulation loop, and a flue gas circulation loop. A finned heat exchanger is installed within the waste heat boiler body, including an ash removal and discharge loop and a collaborative control unit. The collaborative control unit is electrically connected to the steam-water circulation loop, the flue gas circulation loop, and the ash removal and discharge loop, respectively. The ash removal and discharge loop includes a lifting mechanism and a support component. The support component surrounds the finned heat exchanger and is driven to move up and down reciprocally by the lifting mechanism. A steam purging assembly is provided on one side of the support component, and a corresponding negative pressure ash discharge assembly is provided on the other side. The steam purging assembly blows the accumulated ash towards the negative pressure ash discharge assembly, which then discharges the accumulated ash under negative pressure.

[0006] Further, it includes two corresponding steam purging components and negative pressure ash removal components, which are distributed vertically and arranged in opposite directions within the support.

[0007] The lifting mechanism further includes a driver and a pair of lead screws that are driven to rotate synchronously by the driver. The pair of lead screws are vertically arranged in the waste heat boiler body and helically connected to the support at a diagonal position. The support is provided with a commutator connected to the corresponding lead screw. The lead screws are provided with guide grooves along the axial direction. The commutator has an input gear connected to the keyway of the lead screw and an output gear meshing with the input gear. A rotating component connected to the output gear is transferred in the support. The steam purging assembly includes a movably installed steam pipe. The steam pipe is horizontally arranged and has multiple jet nozzles distributed along the axial direction. A transmission mechanism is provided between the steam pipe and the rotating component. When the rotating component rotates, the transmission mechanism drives the steam pipe to reciprocate or oscillate at a specific angle.

[0008] Further, it includes a support that slides within the support member, the rotating member having a reciprocating threaded section, the support being helically connected to the reciprocating threaded section, and a steam pipe mounted on the support, which is driven by the rotating member to move synchronously horizontally back and forth along the support.

[0009] Furthermore, the steam pipe is connected to the support, and the transmission mechanism includes an elastic reset member, a driving sector gear connected to the support, and a driven gear set on the steam pipe to mesh with the driving sector gear. The driving sector gear is sleeved on the rotating member, and the outer wall of the rotating member and the inner wall of the driving sector gear are provided with matching grooves and keys. When the rotating member rotates, it drives the support to slide, and the driving sector gear moves synchronously and rotates synchronously with the rotating member. When the driving sector gear rotates and meshes with the driven gear, it drives the steam pipe to rotate. During this process, the elastic reset member further deforms to generate elastic force. When the driving sector gear disengages from the driven gear, the elastic force drives the steam pipe to rotate back, preparing for the next round of meshing with the driving sector gear.

[0010] Furthermore, the waste heat boiler body has a storage cavity for accommodating the support member. The storage cavity is located directly above or below the finned heat exchanger, and has an opening facing the finned heat exchanger. A pair of doors with elastic reset members are provided at the opening. A stop member that slidably connects to the support member is located inside the storage cavity. The storage cavity has a stop part that abuts against the stop member. Without external force, the pair of doors are in a closed state under the action of the elastic reset member. When the support member leaves the storage cavity via a lifting mechanism, it moves the stop member along with it, pushing the pair of doors open. The stop part abuts against the stop member, causing it to stop at the opening and block the pair of doors, keeping them open. When the support member enters the storage cavity, it moves the stop member along with it into the storage cavity, releasing the block and resetting to a closed state under the action of the elastic reset member.

[0011] Furthermore, the shape of the stop is consistent with that of the opening, and when the stop is stopped at the opening by the blocking part, it closes the opening.

[0012] Furthermore, the pair of doors are slidably connected to the waste heat boiler body. Each door includes a sliding part and a folding part. The elastic reset member is disposed between the sliding part and the folding part. A transmission member that cooperates with the stop member is slidably connected in the storage cavity. A transmission mechanism is provided between the transmission member and the sliding part of the pair of doors. A stop member that cooperates with the transmission member to block is provided in the storage cavity. When the support member leaves the storage cavity through the lifting mechanism, it drives the stop member and the transmission member to move together. When the transmission member is blocked by the stop member, it stops and separates. During this process, The transmission mechanism drives the pair of doors to move to both sides first. The support member then pushes the folding parts of the pair of doors open. The blocking part blocks the support member, causing it to stop at the opening and block the folding parts of the pair of doors, keeping the pair of doors in the open state. When the support member enters the storage cavity, it drives the blocking member to move together into the storage cavity. When it enters the storage cavity, the folding parts of the pair of doors are released from blocking. Under the action of the elastic reset member, the folding parts are reset to the closed state, and then the transmission member is driven to move and reset, so that the pair of doors move to the state of closing the opening.

[0013] Furthermore, one of the doors is provided with a slot for the lead screw to pass through. The slot is provided with two pairs of elastic baffles. When no external force is applied, each pair of elastic baffles is in a state of separating the upper and lower sides of the slot. The two pairs of elastic baffles are distributed vertically, forming a cavity in the middle.

[0014] Furthermore, the steam-water circulation loop is connected to the steam pipe via a pipeline, and a flow regulating device including an electric continuous pressure reducing valve is provided between the steam-water circulation loop and the steam pipe. Several flue gas differential pressure sensors are provided in the flue gas circulation loop. The ash removal loop includes a vacuum device. The lifting mechanism is an electric lifting mechanism. The collaborative control unit includes a PLC controller. The PLC controller is connected to the electric continuous pressure reducing valve, several flue gas differential pressure sensors, the vacuum device, and the electric lifting mechanism.

[0015] By implementing this invention, the gas turbine first burns fuel to drive a generator to generate electricity. The high-temperature flue gas discharged from the combustion chamber exchanges heat with the steam-water circulation loop in the waste heat boiler to achieve waste heat recovery. The condensate is converted into steam, which enters the steam turbine to drive the turbine to rotate, driving the generator to generate electricity again. After the steam has done its work, it is cooled into water and then sent back to the waste heat boiler for circulation. The waste heat boiler body is equipped with a finned heat exchanger and an ash removal and discharge loop. The ash removal and discharge loop includes a lifting mechanism and a support component. The support component is located outside the finned heat exchanger and is driven to move up and down reciprocally by the lifting mechanism. Inside the support component... One side is equipped with a steam purging assembly, and the other side is equipped with a corresponding negative pressure ash removal assembly. When the support is driven to move up and down reciprocally by the lifting mechanism, the steam purging assembly blows the ash onto the finned heat exchanger and blows the accumulated ash toward the negative pressure ash removal assembly. The negative pressure ash removal assembly discharges the accumulated ash under negative pressure. The lifting mechanism drives the up and down movement to achieve position change and fully purge the finned heat exchanger. Ash removal is achieved without stopping the machine, improving the heat exchange efficiency of the finned heat exchanger, thereby improving the waste heat power generation efficiency of the gas turbine. Moreover, the entire ash removal process does not affect the flue gas flow field, and the removed fly ash will not fly away or re-deposit. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the waste heat boiler of the present invention; Figure 2 This is a schematic diagram of one side of the inside of the support member of the present invention; Figure 3 This is a schematic diagram of the dust removal and ash discharge circuit of the present invention during operation; Figure 4 This is a top view of a waste heat boiler; Figure 5 for Figure 4 Sectional view along direction A; Figure 6 for Figure 4 Sectional view along direction B; Figure 7 This is a schematic diagram showing the support component inside the storage cavity. Figure 8 A schematic diagram showing the sliding part of the door driven by the transmission component after it has been moved away; Figure 9 A schematic diagram showing the support component after the folding section has been pushed open; Figure 10 This is a schematic diagram showing how the stop covers the opening during operation. Figure 11 This is a schematic diagram showing the lead screw located within the slot.

[0017] In the diagram: 1. Waste heat boiler body; 2. Finned heat exchanger; 3. Support; 5. Lead screw; 6. Commutator; 7. Guide groove; 8. Input gear; 9. Output gear; 10. Rotating component; 11. Steam pipe; 12. Jet nozzle; 13. Sector gear; 14. Driven gear; 15. Return spring; 16. Support; 17. Ash discharge chamber; 18. Storage chamber; 19. Door; 20. Baffle; 21. Sliding part; 22. Folding part; 23. Transmission component; 24. Transmission rod; 25. Slot; 26. Elastic baffle; 27. Driver. Detailed Implementation

[0018] Embodiments of the present invention: such as Figures 1 to 3 As shown, a gas turbine-enhanced waste heat power generation device includes a waste heat boiler body 1, a steam-water circulation loop, a flue gas circulation loop, a gas turbine, a generator, and a steam turbine. The steam turbine, generator, gas turbine, and waste heat boiler body 1 are connected in sequence. The waste heat boiler body 1 is connected to the steam turbine to form the steam-water circulation loop. A finned heat exchanger 2 is installed inside the waste heat boiler body 1, including an ash removal and discharge loop and a coordinating control unit. The coordinating control unit is electrically connected to the steam-water circulation loop, the flue gas circulation loop, and the ash removal and discharge loop, respectively. The ash removal and discharge loop includes a lifting mechanism and a support mechanism. Support 3 is installed around the finned heat exchanger 2 and is driven to move up and down reciprocally by a lifting mechanism. Inside the support 3, there is a steam purging component on one side and a corresponding negative pressure ash discharge component on the other side. When the support 3 is driven to move up and down reciprocally by the lifting mechanism, the steam purging component blows the ash onto the finned heat exchanger 2 and blows the accumulated ash toward the negative pressure ash discharge component. The negative pressure ash discharge component discharges the accumulated ash under negative pressure. The position change is achieved by the lifting mechanism to drive the up and down movement, so as to fully purge the finned heat exchanger 2. The entire ash removal process will not affect the flue gas flow field, and the cleaned fly ash will not fly away or redeposit.

[0019] As a preferred embodiment, the system includes two corresponding sets of steam purging components and negative pressure ash removal components. These components are installed vertically within the support member 3. One steam purging component is located in front of the finned heat exchanger 2, and the corresponding negative pressure ash removal component is located behind the finned heat exchanger 2. The steam purging component blows the accumulated ash from front to back through the finned heat exchanger 2, discharging it to the rear negative pressure ash removal component. The other steam purging component is located behind the finned heat exchanger 2, and the corresponding negative pressure ash removal component is located behind the finned heat exchanger 2. In front of heat exchanger 2, the finned heat exchanger 2 is blown from front to back to discharge the accumulated ash to the negative pressure ash discharge assembly at the rear. If the finned heat exchanger 2 is blown from only one direction, the back of the heat exchange tube will become a dead angle for blowing. The steam blowing assemblies on both sides blow from opposite directions to achieve dust removal of the finned heat exchanger 2 without dead angles. The two steam blowing assemblies and the corresponding negative pressure ash discharge assembly are distributed vertically. During blowing, due to the obstruction of the fins, the two sets of steam blowing assemblies will not affect each other, thus improving the dust removal efficiency and effect.

[0020] As a preferred embodiment, the lifting mechanism includes a driver 27 and a pair of lead screws 5 that are driven synchronously by the driver 27. The driver is a prior art device, installed at the top or bottom of the waste heat boiler body, and is either a pair of synchronously operating motors or a mechanism consisting of a motor, a transmission rod, and a steering gear to make the two lead screws 5 rotate synchronously. The pair of lead screws 5 are vertically arranged inside the waste heat boiler body 1 and helically connected to the support member 3 at diagonal positions. The support member 3 is provided with a commutator 6 connected to the corresponding lead screw 5. The lead screw 5 has a guide groove 7 along its axial direction. The commutator 6 has an input gear 8 connected to the keyway of the lead screw 5 and an output gear 9 meshing with the input gear 8. When the lead screw 5 drives the support member 3 to move up and down, the commutator 6 moves along with it and drives the input gear 8 to rotate. The support member 3 has a rotating member 10 connected to the output gear 9. During movement, the rotating member 10 is driven to rotate by the output gear 9. The steam purging assembly includes a movably installed steam pipe 11. The steam pipe 11 is horizontally arranged with multiple jet nozzles 12 evenly distributed along the axial direction. A transmission mechanism is provided between the steam pipe 11 and the rotating member 10. When the rotating member 10 rotates, it drives the steam pipe 11 to reciprocate or swing at a specific angle through the transmission mechanism. Specifically, the steam pipe 11 is rotatably installed in the support member 3 and connected to the steam supply device outside the waste heat boiler body 1 through a high-temperature resistant hose. The transmission mechanism includes an elastic reset member, a sector gear 13 set on the rotating member 10, and a driven gear set on the steam pipe 11 that meshes with the sector gear 13. 14. When the sector gear 13 rotates together with the rotating component 10 and meshes with the driven gear 14, it drives the steam pipe 11 to rotate until the driven gear 14 rotates out of the effective meshing area of ​​the sector gear 13. In this invention, the steam pipe 11 is set to rotate 90°, varying within a range of 45° above and below the horizontal line. The elastic reset component is a reset tension spring 15 or a torsion spring. During this process, the elastic reset component further deforms, and the transmission force between the sector gear 13 and the driven gear 14 disappears. Under the action of the elastic reset component, the steam pipe 11 is driven to rotate in the opposite direction to reset, so that the driven gear 14 meshes with the sector gear 13 again, realizing that the steam pipe 11 continuously changes the spray angle to purge the finned heat exchanger 2, which has a better dust removal effect. The negative pressure dust discharge component is included in the support component 3 and is located in the finned heat exchanger. The other side of the heat exchanger 2 has an ash discharge chamber 17, a high-temperature resistant ash discharge hose connected to the ash discharge chamber 17, and an extraction device connected to the ash discharge hose. The extraction device is installed outside the waste heat boiler body 1. During ash removal, the steam purging assembly blows the dust from the finned heat exchanger 2 to the ash discharge chamber 17 on the opposite side. The extraction device operates to create a negative pressure in the ash discharge chamber 17, discharging the blown dust through the ash discharge hose. Two lead screws 5 are spirally connected to the support member 3 at diagonal positions, allowing them to be evenly connected to the support member 3 and achieving smooth lifting and lowering of the support member 3. Furthermore, only one commutator 6 connected to the corresponding lead screw 5 is needed on each side to achieve the reset rotation of the steam pipe 11, causing the spray angle to change continuously. The lead screws 5 are symmetrically connected to the middle positions on both sides of the support member 3.This requires changing the transmission direction by setting up multiple commutators and drive rods.

[0021] As a preferred embodiment, the support 16 is slidably connected within the support member 3. The rotating member 10 has a reciprocating threaded section, and the support 16 is helically connected to the reciprocating threaded section. The steam pipe 11 is connected to the support 16. The outer wall of the rotating member 10 and the inner wall of the driving sector gear 13 are provided with matching grooves and keys. When the rotating member 10 rotates, it drives the support 16 to slide. The driving sector gear 13 moves synchronously and rotates synchronously with the rotating member 10. The driven gear 14 on the steam pipe 11 remains engaged. The steam pipe 11 moves horizontally back and forth with the support 16 and simultaneously maintains reciprocating rotation. Since the jet nozzle 12 normally sprays in a fan shape, there will be a blind spot between the two jet nozzles 12 in the initial spray position area. The steam pipe 11 maintains a certain distance of horizontal reciprocating movement. If the horizontal displacement is the same as the distance between the two jet nozzles 12, the blind spot can be covered, achieving cleaning without dead angles.

[0022] As a preferred option, such as Figures 4 to 11As shown, the waste heat boiler body 1 has a storage cavity 18 for accommodating the support member 3. The storage cavity 18 is located directly above the finned heat exchanger 2. The bottom of the storage cavity 18 has an opening, and a pair of doors 19 with elastic reset elements are provided at the opening. A stop member 20 that is connected to the support member 3 is slidably connected inside the storage cavity 18. The storage cavity 18 has a stop part that abuts against the stop member 20. The elastic reset element is a torsion spring. Under the action of the torsion spring, the pair of doors 19 are in a state of closing the opening. In the non-cleaning state, the support member 3 is driven to rise into the storage chamber 18 by the lifting mechanism. A pair of doors 19 close their lower openings under the action of torsion springs. The stop member 20 is located above the support member 3 and is provided with a corresponding snap-fit ​​mechanism or magnetic attraction mechanism. When the support member 3 is in the non-cleaning state within the storage chamber 18, the stop member 20 is connected to the support member 3 through the snap-fit ​​mechanism or magnetic attraction mechanism. During cleaning, the support member 3 descends via the lifting mechanism, and the stop member 20 moves down with it. During this process, the support member 3 pushes the pair of doors 19 outward to open the opening and then continues to move down to the finned heat exchanger 2. When the baffle 20 moves down to the blocking part to block it, the locking mechanism or magnetic attraction mechanism separates. The baffle 20 stays at the opening and continues to block the pair of doors 19, keeping the pair of doors in the open state. After the dust removal is completed, when the support member 3 rises into the storage chamber 18, it drives the baffle 20 to move up into the storage chamber 18 together. The pair of doors 19 are released from blocking. Under the action of the torsion spring, the pair of doors 19 return to the state of closing the opening. The opening and closing of the doors 19 is achieved through the movement and cooperation of the support member 3 and the baffle 20. When the support member 3 is not cleaned, it is stored in the storage chamber 1 and separated from the high-temperature exhaust gas. On the one hand, the high-temperature exhaust gas passing through will hardly affect the support member 3 and the internal steam purging components and negative pressure ash removal components, reducing its time in the high-temperature and dusty environment and improving its service life. At the same time, the support member 3 will not block the finned heat exchanger 2 when it is not cleaned, and will not affect the heat exchange efficiency.

[0023] As a preferred embodiment, the baffle 20 is shaped to match the opening. The baffle 20 is stopped at the opening by the blocking part, blocking the door 19 so that the door 19 is in the open state. The baffle 20 closes the opening, that is, during dust cleaning, the baffle 20 closes the opening to prevent high temperature exhaust gas from entering the storage chamber 18, keeping the storage chamber 18 in a closed state, which is conducive to keeping the inside of the storage chamber 18 clean.

[0024] As a preferred embodiment, a pair of doors 19 are slidably connected within the waste heat boiler body 1. Each door 19 includes a sliding part 21 and a folding part 22. A torsion spring is disposed between the sliding part 21 and the folding part 22. The sliding part 21 is horizontally positioned and can move horizontally within the waste heat boiler body 1. The folding part 22 is connected to the sliding part 21 and can be folded outward relative to the sliding part 21. Under no external force, the folding part 22 is in an unfolded state with the sliding part 21 on the same plane by the torsion spring. A transmission member 23 is slidably connected within the storage cavity 18 and is connected to the stop member 20. A transmission mechanism is provided between the transmission member 23 and the sliding part 21 of the pair of doors 19. A stop member 23 is provided within the storage cavity 18 and is located at the stop member 20. Above component 20, it is connected to the stop component 20 via a snap-fit ​​mechanism or a magnetic attraction mechanism. However, the force required for its separation is less than the force required for the stop component 20 to separate from the support component 3. The transmission mechanism consists of several transmission rods 24, each end of which is connected to the transmission component 23 and the sliding part 21 of the two doors 19 respectively. When not cleaning, the support component 3 is located in the storage cavity 18 and connected to the stop component 20 via a snap-fit ​​mechanism. This snap-fit ​​mechanism consists of snap-fit ​​pieces located at the top of the support component 3 and at the four corners of the bottom of the stop component 20. The stop component 20 is connected to the transmission component 23 above it. Specifically, the bottom of the transmission component 23 and the center of the top of the stop component 20 are provided with a matching snap-fit ​​piece. When the support component 3 is moved downward by the lifting mechanism, the stop component 20 and the transmission component 23 move downward together. As the door 19 moves downward, under the action of the transmission rod 24, the sliding parts 21 of the two doors 19 move backward to both sides, opening the opening by a certain distance. This prevents the support member 3 from contacting the sliding part 21 when passing through the opening. When the transmission member 23 moves downward to the second stop, it is stopped and separates from the stop member 20. The stop member 20 and the support member 3 continue to move downward. The support member 3 pushes the folding part 22 to fold outward. When the stop member 20 moves downward to the stop and blocks it, it separates from the support member 3. At this position, it blocks the folding part 22, keeping the opening open. If the door 19 opens directly by folding outward, the top of the finned heat exchanger 2 needs to be far away from the opening of the storage chamber 18 so that the door 19 does not contact or interfere with the finned heat exchanger 2 during the folding process. When the exhaust gas passes through this distance, it cannot exchange heat, which affects the heat exchange efficiency. With this structure, when the transmission component 23 moves down with the support component 3, the two doors 19 are first moved to the sides by a distance through the sliding part 21. The support component 3 can go out through the opening by pushing the folding part 22 outward. When entering the opening, the support component 3 moves up and drives the stop 20 to move up, so that the folding part 22 is in a horizontal state. Then, the transmission component 23 moves up and the sliding part 21 moves to face, so that the door 19 completely blocks the opening. Compared with the width of the door 19, the width of the folding part 22 is greatly reduced, so that the finned heat exchanger 2 and the door 19 can pass through the opening smoothly even when the distance is small, reducing the heat exchange impact between the exhaust gas and the finned heat exchanger 2.

[0025] As a preferred embodiment, a pair of doors 19 are provided with slots 25 for the lead screw 5 to pass through. Two pairs of elastic baffles 26 are provided in the slots 25. The two pairs of elastic baffles 26 are made of deformable high-temperature resistant material, such as fiberglass cloth wrapped around a metal mesh in this application. When the doors 19 move, the lead screw 5 enters and exits the doors 19 through the slots 25. During the passage, the two pairs of elastic baffles 26 deform. Without external force, the elastic baffles 26 rely on the elasticity of the metal mesh to return to their original state and separate the upper and lower sides of the slots 25. That is, when the door is closed, the two pairs of elastic baffles 26 separate the upper and lower sides of the slots 25, preventing high-temperature exhaust gas from entering the storage chamber. At the same time, since the two pairs of elastic baffles 26 are distributed vertically, a cavity is formed in the middle, which has a better barrier effect.

[0026] As a preferred embodiment, the steam-water circulation loop is connected to the steam pipe via a pipeline. A flow regulation device, including an electric continuous pressure reducing valve, is installed between the steam-water circulation loop and the steam pipe. Several flue gas differential pressure sensors are installed in the flue gas flow loop. The ash removal loop includes a vacuum device. The lifting mechanism is an electric lifting mechanism. The collaborative control unit includes a PLC controller. The PLC controller is connected to the electric continuous pressure reducing valve, several flue gas differential pressure sensors, the vacuum device, and the electric lifting mechanism. Several flue gas differential pressure sensors are installed at the inlet and outlet of the waste heat boiler to collect the pressure difference signal before and after the flow channel in real time and transmit it to the PLC controller. The PLC controller judges the degree of ash blockage in the finned heat exchanger 2 by the pressure difference change, which serves as the basis for starting and stopping the ash removal loop. During startup, the electric lifting mechanism is controlled to rise and fall, and the electric continuous pressure reducing valve is controlled to adjust the steam flow and the operation of the vacuum device. The steam in the steam-water circulation loop can be directly used for ash removal, simplifying the equipment. The vacuum device discharges the cleaned ash. Based on the pressure difference threshold, the system automatically starts and stops and controls the ash removal time and frequency to achieve adaptive adjustment.

Claims

1. A gas turbine-enhanced waste heat power generation device, comprising a waste heat boiler body, a steam-water circulation loop, and a flue gas circulation loop, wherein a finned heat exchanger is installed within the waste heat boiler body, characterized in that: It includes a dust removal and ash discharge circuit and a collaborative control unit. The collaborative control unit is electrically connected to the steam-water circulation circuit, the flue gas circulation circuit, and the dust removal and ash discharge circuit. The dust removal and ash discharge circuit includes a lifting mechanism and a support component. The support component is installed around the finned heat exchanger and is driven to move up and down reciprocally by the lifting mechanism. Inside the support component, one side is provided with a steam purging assembly and the other side is provided with a corresponding negative pressure ash discharge assembly. The steam purging assembly blows the accumulated ash towards the negative pressure ash discharge assembly, which then discharges the accumulated ash under negative pressure.

2. The gas turbine enhanced waste heat power generation device according to claim 1, characterized in that: It includes two sets of corresponding steam purging components and negative pressure ash removal components, which are distributed vertically and arranged in opposite directions within the support.

3. The gas turbine enhanced waste heat power generation device according to claim 2, characterized in that: The lifting mechanism includes a driver and a pair of lead screws that are driven to rotate synchronously by the driver. The pair of lead screws are vertically arranged in the waste heat boiler body and helically connected to the support at a diagonal position. The support is provided with a commutator connected to the corresponding lead screw. The lead screw has a guide groove along the axial direction. The commutator has an input gear connected to the keyway of the lead screw and an output gear meshing with the input gear. A rotating component connected to the output gear is transferred in the support. The steam purging assembly includes a movably installed steam pipe. The steam pipe is horizontally arranged and has multiple jet nozzles distributed along the axial direction. A transmission mechanism is provided between the steam pipe and the rotating component. When the rotating component rotates, the transmission mechanism drives the steam pipe to reciprocate or oscillate at a specific angle.

4. The gas turbine enhanced waste heat power generation device according to claim 3, characterized in that: The device includes a support that slides within a support member, the rotating member having a reciprocating threaded section, the support being helically connected to the reciprocating threaded section, and a steam pipe mounted on the support, which is driven by the rotating member to move synchronously and horizontally back and forth along the support.

5. The gas turbine enhanced waste heat power generation device according to claim 4, characterized in that: The steam pipe is connected to the support. The transmission mechanism includes an elastic reset member, a driving sector gear connected to the support, and a driven gear on the steam pipe that meshes with the driving sector gear. The driving sector gear is sleeved on the rotating member. The outer wall of the rotating member and the inner wall of the driving sector gear are provided with matching grooves and keys. When the rotating member rotates, it drives the support to slide, and the driving sector gear moves synchronously and rotates synchronously with the rotating member. When the driving sector gear rotates and meshes with the driven gear, it drives the steam pipe to rotate. During this process, the elastic reset member further deforms to generate elastic force. When the driving sector gear disengages from the driven gear, the elastic force drives the steam pipe to rotate back, preparing for the next round of meshing with the driving sector gear.

6. The gas turbine enhanced waste heat power generation device according to any one of claims 1 to 5, characterized in that: The waste heat boiler body has a storage cavity for accommodating the support member. The storage cavity is located directly above or below the finned heat exchanger and has an opening facing the finned heat exchanger. A pair of doors with elastic reset members are provided at the opening. A stop member that slidably connects to the support member is located inside the storage cavity. The storage cavity has a stop part that abuts against the stop member. Without external force, the pair of doors are closed under the action of the elastic reset member. When the support member leaves the storage cavity via a lifting mechanism, it moves the stop member along with it, pushing the pair of doors open. The stop part abuts against the stop member, causing it to stop at the opening and block the pair of doors, keeping them open. When the support member enters the storage cavity, it moves the stop member along with it into the storage cavity. The pair of doors release the block and reset to the closed state under the action of the elastic reset member.

7. The gas turbine enhanced waste heat power generation device according to claim 6, characterized in that: The shape of the stop is consistent with that of the opening, and the opening is closed when the stop is blocked and stops at the opening by the blocking part.

8. The gas turbine enhanced waste heat power generation device according to claim 6 or 7, characterized in that: The pair of doors are slidably connected to the waste heat boiler body. Each door includes a sliding part and a folding part. An elastic reset member is disposed between the sliding part and the folding part. A transmission member that cooperates with a stop member is slidably connected in the storage cavity. A transmission mechanism is provided between the transmission member and the sliding part of the pair of doors. A stop member is provided in the storage cavity to cooperate with the transmission member and block it. When the support member leaves the storage cavity through the lifting mechanism, it drives the stop member and the transmission member to move together. When the transmission member is blocked by the stop member, it stops and separates. During this process, the transmission mechanism drives the pair of doors to move to both sides first. The support member then pushes the folding part of the pair of doors to open. The stop member blocks the support member and stops it at the opening to block the folding part of the pair of doors, keeping the pair of doors in the open state. When the support member enters the storage cavity, it drives the stop member to move together into the storage cavity. When it enters the storage cavity, the folding part of the pair of doors is released from blocking. The folding part is reset to the closed state under the action of the elastic reset member. Then, it drives the transmission member to move and reset, so that the pair of doors move to the state of closing the opening.

9. The gas turbine enhanced waste heat power generation device according to claim 8, characterized in that: The door is provided with a slot for the lead screw to pass through. The slot is provided with two pairs of elastic baffles. When no external force is applied, each pair of elastic baffles is in a state of separating the upper and lower sides of the slot. The two pairs of elastic baffles are distributed vertically and vertically, forming a cavity in the middle.

10. The gas turbine enhanced waste heat power generation device according to claim 1, characterized in that: The steam-water circulation loop is connected to the steam pipe via a pipeline. A flow regulating device, including an electric continuous pressure reducing valve, is provided between the steam-water circulation loop and the steam pipe. Several flue gas differential pressure sensors are provided in the flue gas circulation loop. The ash removal loop includes a vacuum device. The lifting mechanism is an electric lifting mechanism. The collaborative control unit includes a PLC controller. The PLC controller is connected to the electric continuous pressure reducing valve, several flue gas differential pressure sensors, the vacuum device, and the electric lifting mechanism.

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