Circulating heat exchange device and heat exchange method for heat exchange station of thermal power plant

Abstract

The invention discloses a circulating heat exchange device and a heat exchange method for a heat exchange station of a thermal power plant, and relates to the field of heat exchange of heat exchange stations. The circulating heat exchange device comprises a treatment box, a primary net water return pipeline and a secondary net water return pipeline which are arranged on the two sides of the treatment box, and a heat exchange cylinder, a filtering assembly and a fixing assembly which are arranged in the treatment box; a collecting box and a limiting assembly are further arranged on the lower surface of the treatment box, the collecting box is fixed to the lower surface of the treatment box through the limiting assembly, and the collecting box corresponds to the heat exchange cylinder in position. By controlling the magnetic pole of the electromagnet, the scraping plate can scrape the inner wall of the heat exchange cylinder, in the process that the bottom plate rotates along with the scraping plate, the baffle can stop scale falling on the bottom plate, so that the scale falls into the second drain outlet, and when the first drain outlet communicates with the second drain outlet, the scale falls into the collecting box, so that the scale is prevented from falling off. And therefore, non-stop cleaning of the scale is achieved, the labor amount of workers is reduced, and the efficiency of the heat exchange device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange in thermal power plants, and in particular to a circulating heat exchange device and a heat exchange method for a heat exchange station in a thermal power plant. Background Art

[0002] The heat exchange system in the heat exchange station of a thermal power plant is its core component, which is mainly responsible for the transfer and conversion of heat energy to ensure that heat energy is effectively transferred from the heat source to the area or building that needs heating. At present, the thermal system of the heat exchange station consists of a primary network water supply and return system, a secondary network water supply and return system, a water replenishment system, and a heat metering system. The various parts are interrelated and interact with each other. The heat source enters the heat exchanger through the primary network water supply pipeline. After sufficient heat exchange, it flows back to the heat source through the primary network return pipeline. The water in the secondary network is fully heated in the heat exchanger and enters the heat user through the secondary network water supply pipeline. After the user obtains the heat, the secondary network circulation pump will pass the water through the secondary network return pipeline and then enter the heat exchanger, and the heat is circulated to the user.

[0003] During the water circulation process, it is necessary to cooperate with a dirt remover to filter the circulating water inside the water pipe. The common filtering method is to filter through a filter. After the filter is used for a long time, a lot of debris will accumulate on the surface of the filter, which will easily affect the filtering effect of the filter and reduce the heat exchange effect of the water during the circulation process. At the same time, the interior of the heat exchange device is immersed in high-temperature water for a long time, and scale will often appear after a period of use, thereby affecting the normal use of the heat exchange device. In order to clean the scale, the staff usually need to disassemble the various parts of the heat exchange device, and then use various agents and tools to clean the interior of the heat exchange device. This operation not only increases the workload of the staff, but also reduces the efficiency of the heat exchange device, which does not meet the current low-carbon green construction requirements of thermal power plants and thermal power stations. To this end, we provide a circulating heat exchange device and heat exchange method for a thermal power plant heat exchange station to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a circulating heat exchange device and a heat exchange method for a heat exchange station in a thermal power plant, which can replace the filter screen and remove the scale generated during the heat exchange process without stopping the machine during the continuous heat exchange process, thereby ensuring that the circulating water can be continuously filtered. This solves the problem that a lot of debris will accumulate on the surface of the filter screen after long-term use, and the machine needs to be stopped for scale removal, which affects the heat exchange process.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A circulating heat exchange device of a heat exchange station of a thermal power plant, comprising a treatment box and a primary network return water pipe and a secondary network return water pipe arranged on both sides of the treatment box, and also comprising a heat exchange cylinder, a filter assembly and a fixing assembly arranged inside the treatment box, wherein a collection box and a limit assembly are further arranged on the lower surface of the treatment box, wherein the collection box is fixed on the lower surface of the treatment box by the limit assembly, and the position of the collection box corresponds to that of the heat exchange cylinder;

[0006] The processing box includes a heat exchange bin, the heat exchange cylinder includes a support rod fixed to the inner wall of the heat exchange bin, a scraper is rotatably connected to the side of the support rod, a bottom plate is fixed to the lower surface of the scraper, a baffle is also fixed to the side of the support rod, the baffle is arranged on the upper surface of the bottom plate, a second sewage outlet is opened on the surface of the bottom plate, and a first sewage outlet is opened on the surface of the heat exchange bin, and the first sewage outlet can be connected to the second sewage outlet;

[0007] The filter assembly includes a support frame fixed to the inner wall of the heat exchange chamber and a filter plate clamped on the surface of the support frame. The filter assembly is fixed inside the heat exchange chamber through a fixing assembly.

[0008] Furthermore, a second placement groove is opened inside the heat exchange cylinder, and a first placement groove is opened on the surface of the heat exchange chamber. The first placement groove is connected to the second placement groove. An electromagnet is installed inside the second placement groove. The electromagnet is "U"-shaped, and the N and S poles of the electromagnet are gradually flipped. The scraper is made of magnet.

[0009] Furthermore, a first slider is fixed to the lower surface of the filter plate, a first slide groove is provided on the surface of the support frame, the first slider moves in the first slide groove, the first slider and the first slide groove of the filter plate move on the surface of the support frame, there are two first sliders and two first slide grooves, and they are symmetrically arranged on the lower surface of the filter plate, and a movable groove corresponding to the filter plate is provided on the surface of the processing box, and the movable groove is "H" shaped.

[0010] Furthermore, the fixing component includes a knob arranged on the surface of the processing box, a transmission bin is opened inside the processing box, a threaded rod is fixed to the lower end of the knob, the lower end of the threaded rod is rotatably passed through the transmission bin, a threaded tube is threadedly connected to the surface of the threaded rod, a pushing block is fixed to the lower end of the threaded tube, a telescopic groove is opened on the surface of the support frame, the telescopic groove is connected to the transmission bin, a first limit rod is arranged below the push block, and the first limit rod is arranged in the telescopic groove.

[0011] Furthermore, a first slot is provided on the surface of the filter plate, one end of the first limit rod is clamped in the first slot, the first limit rod and the push block are perpendicular to each other, a first spring is also sleeved on the surface of the first limit rod, a second slider is fixed to the side of the threaded tube, a second slide groove is provided on the surface of the transmission bin, the second slider moves in the second slide groove, the threaded tube moves in the transmission bin through a knob, a threaded rod, a second slider and a second slide groove, there are two second sliders and two second slide grooves, and they are symmetrically arranged on both sides of the threaded tube.

[0012] Furthermore, a mounting groove is provided on the lower surface of the processing box, the upper end of the collection box is clamped in the mounting groove, a limiting groove is provided on the side of the mounting groove of the processing box, the limiting assembly includes a sliding rod fixed inside the limiting groove, a second limiting rod is sleeved on the surface of the sliding rod, a shift block is fixed on the side of the second limiting rod, a second clamping groove is provided on the side of the collection box, and one end of the second limiting rod is clamped in the second clamping groove.

[0013] Furthermore, a second spring is sleeved on the surface of the slide rod, and a movable groove is also opened on the lower surface of the processing box. The movable groove is connected with the limit groove, and the shift block is passed through the movable groove. There are two limit assemblies, installation grooves and limit grooves, and they are symmetrically arranged on both sides of the collection box.

[0014] Furthermore, one end of the primary network return water pipe and the secondary network return water pipe respectively pass through the treatment box and the heat exchange cylinder, and the surface of the treatment box and the surface of the heat exchange cylinder are provided with through holes corresponding to the primary network return water pipe and the secondary network return water pipe. The other end of the primary network return water pipe is connected to the heat source body, and the other end of the secondary network return water pipe is connected to the heat extraction equipment body.

[0015] The heat exchange method of the circulating heat exchange device of the heat exchange station of the thermal power plant is as follows:

[0016] The hot water in the heat source body enters the processing box through the primary network return water pipe, and fully exchanges heat with the cold water in the heat exchange cylinder, and then flows back to the heat source body through the primary network return water pipe. After being fully heated, the water in the heat exchange cylinder enters the heat extraction equipment body through the secondary network return water pipe. After the user obtains the heat, the water is pumped through the secondary network return water pipe and then enters the heat exchange cylinder through the circulation pump, thereby realizing cyclic heat exchange;

[0017] Among them, by controlling the N and S poles of the electromagnet to attract the scraper, the scraper is driven to rotate. When the scraper rotates to the side of the electromagnet, the magnetic poles of the electromagnet are adjusted to make it repel the scraper with the same polarity, so as to push the scraper to rotate, thereby realizing the circular motion of the scraper, and then scraping the inner wall of the heat exchange cylinder. At the same time, the scraped scale falls on the bottom plate. In the process of the bottom plate rotating with the scraper, it is blocked by the baffle and falls into the second sewage outlet. When the first sewage outlet is connected with the second sewage outlet, the scale falls into the collection box;

[0018] Secondly, when the hot water in the heat source body enters the treatment box through the primary network return pipe, the hot water is filtered by the filter assembly. When the filter plate needs to be replaced, you only need to turn the knob to drive the threaded rod to rotate. The threaded rod drives the threaded tube and the pushing block fixed at one end of the threaded tube to move upward, so that the pushing block is separated from the first limit rod. Under the rebound force of the first spring, the first limit rod is pushed out of the first slot. At this time, the filter plate is moved from the left side to the right side, and a new filter plate is installed on the left side. Turn the knob in the opposite direction to fix the filter plate on the left side, and then take the filter plate on the right side out of the moving slot.

[0019] Compared with the prior art, the circulating heat exchange device and heat exchange method of the heat exchange station of the thermal power plant have the following beneficial effects:

[0020] 1. The present invention controls the magnetic poles of the electromagnet so that the scraper can scrape the inner wall of the heat exchange tube, and when the bottom plate rotates with the scraper, the baffle can block the scale that falls on the bottom plate, so that the scale falls into the second sewage outlet. When the first sewage outlet is connected to the second sewage outlet, the scale falls into the collection box, thereby realizing non-stop cleaning of the scale, reducing the workload of the staff and improving the efficiency of the heat exchange device. At the same time, the electromagnet can construct a magnetic field in the heat exchange tube, so that the impurities in the heat exchange tube are charged, and finally generate a potential to become a polar substance, which can further prevent the calcium and magnesium ions in the water from adhering to the inner wall of the heat exchange tube to generate scale.

[0021] Second, the present invention can replace the filter plate during the circulation heat exchange process through the fixing assembly and the filtering assembly, which can effectively remove the debris accumulated on the filter net and maintain a good filtering effect. This helps to improve the water circulation efficiency, reduce the interference with the heat exchange process, and also reduce the wear of the debris on the water pump and the heat exchanger, extend the service life of the equipment, and reduce the maintenance cost. At the same time, the filter plate can be replaced without affecting the normal operation of the system, avoiding production losses and time waste caused by downtime.

[0022] 3. The present invention can collect the cleaned scale through the limit assembly and the collection box, which is convenient for regular cleaning and management and avoids environmental pollution caused by random scattering of scale. The second limit rod is driven to move by toggling the lever, so that the second limit rod is disengaged from the second slot, thereby facilitating the staff to perform regular maintenance and cleaning of the collection box and reducing maintenance costs.

[0023] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention;

[0026] Figure 3 It is a left side cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4 It is a right side cross-sectional structural schematic diagram of the present invention;

[0028] Figure 5 It is a partial cross-sectional structural schematic diagram of the processing box in the present invention;

[0029] Figure 6 Detailed structural diagram of the filter plate in the present invention;

[0030] Figure 7 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0031] Figure 8 For the present invention Figure 3 Schematic diagram of the enlarged structure at point B.

[0032] In the figure:

[0033] 1. Processing box; 101. Heat exchange chamber; 102. Through hole; 103. Transmission chamber; 104. First placement slot; 105. First sewage outlet; 106. Limiting slot; 107. Installation slot;

[0034] 2. Primary network return water pipeline; 3. Secondary network return water pipeline; 4. Heat source body; 5. Heat extraction equipment body;

[0035] 6. Filter assembly; 601. Support frame; 602. Filter plate; 603. First slider; 604. Telescopic slot; 605. First slot;

[0036] 7. Fixing assembly; 701. Knob; 702. Threaded rod; 703. Threaded tube; 704. Push block; 705. First limit rod; 706. First spring; 707. Second slider;

[0037] 8. heat exchange cylinder; 801. support rod; 802. scraper; 803. bottom plate; 804. second placement slot; 805. baffle; 806. second sewage outlet;

[0038] 9. Collection box;

[0039] 10. Limiting assembly; 1001. Sliding rod; 1002. Second limiting rod; 1003. Dial block; 1004. Second spring; 1005. Movable slot;

[0040] 11. Electromagnet. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-8 The present invention provides a technical solution: a circulating heat exchange device of a heat exchange station in a thermal power plant, comprising a treatment box 1 and a primary network return water pipe 2 and a secondary network return water pipe 3 arranged on both sides of the treatment box 1, and also comprising a heat exchange cylinder 8, a filter assembly 6 and a fixing assembly 7 arranged inside the treatment box 1. A collecting box 9 and a limiting assembly 10 are also arranged on the lower surface of the treatment box 1. The collecting box 9 is fixed to the lower surface of the treatment box 1 by the limiting assembly 10, and the position of the collecting box 9 corresponds to that of the heat exchange cylinder 8.

[0043] Please refer to Figure 2 , Figure 4 and Figure 5The processing box 1 includes a heat exchange bin 101, and the heat exchange cylinder 8 includes a support rod 801 fixed to the inner wall of the heat exchange bin 101. The side of the support rod 801 is rotatably connected with a scraper 802, and a bottom plate 803 is fixed to the lower surface of the scraper 802. A baffle 805 is also fixed to the side of the support rod 801. The baffle 805 is arranged on the upper surface of the bottom plate 803. The surface of the bottom plate 803 is provided with a second sewage outlet 806, and the surface of the heat exchange bin 101 is provided with a first sewage outlet 105, and the first sewage outlet 105 can be connected with the second sewage outlet 806; a second placement groove 804 is provided inside the heat exchange cylinder 8, and a first placement groove 104 is provided on the surface of the heat exchange bin 101. The first placement groove 104 is connected with the second placement groove 804, and an electromagnet 11 is installed inside the second placement groove 804. The electromagnet 11 is "U" shaped, and the N, The S pole gradually flips, and the material of the scraper 802 is magnet; the present invention controls the magnetic pole of the electromagnet 11 so that the scraper 802 can scrape the inner wall of the heat exchange tube 8, and the baffle 805 can block the scale falling on the bottom plate 803 during the rotation of the bottom plate 803 following the scraper 802, so that the scale falls into the second sewage outlet 806, and when the first sewage outlet 105 is connected to the second sewage outlet 806, the scale falls into the collection box 9, thereby realizing non-stop cleaning of the scale, reducing the workload of the staff and improving the efficiency of the heat exchange device. At the same time, the electromagnet 11 can construct a magnetic field in the heat exchange tube 8, so that the impurities in the heat exchange tube 8 will be charged, and finally generate a potential to become a polar substance, which can further prevent the calcium and magnesium ions in the water from adhering to the inner wall of the heat exchange tube 8 to produce scale.

[0044] Please refer to Figure 3 , Figure 6 and Figure 8The filter assembly 6 includes a support frame 601 fixed to the inner wall of the heat exchange chamber 101 and a filter plate 602 clamped on the surface of the support frame 601. The filter assembly 6 is fixed inside the heat exchange chamber 101 through a fixing assembly 7. A first slider 603 is fixed to the lower surface of the filter plate 602. A first slide groove is provided on the surface of the support frame 601. The first slider 603 moves in the first slide groove. The first slider 603 of the filter plate 602 and the first slide groove move on the surface of the support frame 601. There are two first sliders 603 and two first slide grooves. The filter plate 602 is symmetrically arranged on the lower surface of the filter plate 602, and a movable groove corresponding to the filter plate 602 is opened on the surface of the processing box 1, and the movable groove is "H" shaped; the fixing component 7 includes a knob 701 arranged on the surface of the processing box 1, and a transmission compartment 103 is opened inside the processing box 1. A threaded rod 702 is fixed at the lower end of the knob 701, and the lower end of the threaded rod 702 is rotatably inserted into the transmission compartment 103. The surface of the threaded rod 702 is threadedly connected with a threaded tube 703, and a push block 704 is fixed at the lower end of the threaded tube 703. The surface of the support frame 601 A telescopic groove 604 is provided on the surface, and the telescopic groove 604 is connected to the transmission bin 103. A first limiting rod 705 is provided below the pushing block 704, and the first limiting rod 705 is arranged in the telescopic groove 604; a first clamping groove 605 is provided on the surface of the filter plate 602, and one end of the first limiting rod 705 is clamped in the first clamping groove 605, and the first limiting rod 705 and the pushing block 704 are perpendicular to each other. A first spring 706 is also sleeved on the surface of the first limiting rod 705, and a second slider 707 is fixed on the side of the threaded tube 703. The surface of 103 is provided with a second slide groove, and the second slider 707 moves in the second slide groove. The threaded tube 703 moves in the transmission chamber 103 through the knob 701, the threaded rod 702, the second slider 707 and the second slide groove. There are two second sliders 707 and the second slide groove, and they are symmetrically arranged on both sides of the threaded tube 703. The present invention can replace the filter plate 602 during the circulation heat exchange process through the fixing component 7 and the filter component 6, which can effectively remove the debris accumulated on the filter net and maintain a good filtering effect. This helps to improve the circulation efficiency of water, reduce the interference with the heat exchange process, and can also reduce the wear of debris on the water pump and the heat exchanger, extend the service life of the equipment, and reduce the maintenance cost. At the same time, the filter plate 602 can be replaced without affecting the normal operation of the system, avoiding production losses and time waste caused by downtime.

[0045] Please refer to Figure 2 , Figure 4 and Figure 7A mounting groove 107 is provided on the lower surface of the processing box 1, and the upper end of the collection box 9 is clamped in the mounting groove 107. A limiting groove 106 is provided on the side of the mounting groove 107 of the processing box 1. The limiting assembly 10 includes a slide bar 1001 fixed inside the limiting groove 106, a second limiting rod 1002 is sleeved on the surface of the slide bar 1001, and a shift block 1003 is fixed on the side of the second limiting rod 1002. A second slot is provided on the side of the collection box 9, and one end of the second limiting rod 1002 is clamped in the second slot; a second spring 1004 is sleeved on the surface of the slide bar 1001, and a movable groove 1005 is also provided on the lower surface of the processing box 1. 1005 is connected with the limit groove 106, the shifting block 1003 is inserted in the movable groove 1005, and there are two limit assemblies 10, installation grooves 107 and limit grooves 106, which are symmetrically arranged on both sides of the collection box 9; the present invention can collect the cleaned scale through the limit assembly 10 and the collection box 9, which is convenient for regular cleaning and management, and avoids environmental pollution caused by random scattering of scale, wherein, by shifting the lever, the second limit rod 1002 is driven to move, so that the second limit rod 1002 is disengaged from the second card slot, thereby facilitating the staff to perform regular maintenance and cleaning of the collection box 9 and reducing maintenance costs.

[0046] Please refer to Figure 1 One end of the primary network return water pipe 2 and the secondary network return water pipe 3 pass through the treatment box 1 and the heat exchange tube 8 respectively. The surface of the treatment box 1 and the surface of the heat exchange tube 8 are provided with through holes 102 corresponding to the primary network return water pipe 2 and the secondary network return water pipe 3. The other end of the primary network return water pipe 2 is connected to the heat source body 4, and the other end of the secondary network return water pipe 3 is connected to the heat extraction equipment body 5.

[0047] The heat exchange method of the circulating heat exchange device of the heat exchange station of the thermal power plant is as follows:

[0048] First, the device is connected to an external control device and 220V AC power, and the control device can be a conventional known device such as a computer that performs control. Then, the staff uses the control device to allow the hot water in the heat source body 4 to enter the treatment box 1 through the primary network return water pipe 2, and fully exchange heat with the cold water in the heat exchange cylinder 8, and then flow back to the heat source body 4 through the primary network return water pipe 2. After being fully heated, the water in the heat exchange cylinder 8 enters the heat extraction device body 5 through the secondary network return water pipe 3. After the user obtains heat, the water is pumped through the secondary network return water pipe 3 and then enters the heat exchange cylinder 8 through the circulation pump, thereby realizing circulating heat exchange.

[0049] Among them, by controlling the N and S poles of the electromagnet 11, the scraper 802 is attracted to each other, driving the scraper 802 to rotate. When the scraper 802 rotates to the side of the electromagnet 11, the magnetic poles of the electromagnet 11 are adjusted to make it repel each other with the same poles as the scraper 802, pushing the scraper 802 to rotate, thereby realizing the circular motion of the scraper 802, and then scraping the inner wall of the heat exchange tube 8. At the same time, the scraped scale falls on the bottom plate 803. During the process of the bottom plate 803 rotating with the scraper 802, it is blocked by the baffle 805 and falls into the second sewage outlet 806. When the first sewage outlet 105 is connected to the second sewage outlet 806, the scale falls into the collection box 9.

[0050] Secondly, when the hot water in the heat source body 4 enters the treatment box 1 through the primary network return pipe 2, the hot water is filtered by the filter assembly 6. When the filter plate 602 needs to be replaced, it is only necessary to turn the knob 701 to drive the threaded rod 702 to rotate. The threaded rod 702 drives the threaded tube 703 and the pushing block 704 fixed at one end of the threaded tube 703 to move upward, so that the pushing block 704 is separated from the first limiting rod 705. Under the rebound force of the first spring 706, the first limiting rod 705 is pushed out of the first slot 605. At this time, the filter plate 602 is moved from the left side to the right side, and a new filter plate 602 is installed at the left position. The knob 701 is turned in the opposite direction to fix the filter plate 602 on the left side, and then the filter plate 602 on the right side is taken out of the moving slot.

[0051] Finally, when the staff needs to clean and replace the collection box 9, the staff only needs to push the lever to drive the second limit rod 1002 to move, so that the second limit rod 1002 is disengaged from the second card slot, thereby facilitating the staff to perform regular maintenance and cleaning of the collection box 9 and reducing maintenance costs.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A circulating heat exchange device for a heat exchange station of a thermal power plant, comprising a treatment box (1) and a primary network return water pipeline (2) and a secondary network return water pipeline (3) arranged on both sides of the treatment box (1), Features: It also comprises a heat exchange cylinder (8), a filter assembly (6) and a fixing assembly (7) arranged inside the processing box (1); a collection box (9) and a stop assembly (10) are also arranged on the lower surface of the processing box (1); the collection box (9) is fixed to the lower surface of the processing box (1) by the stop assembly (10); the position of the collection box (9) corresponds to that of the heat exchange cylinder (8); The treatment box (1) comprises a heat exchange chamber (101), the heat exchange cylinder (8) comprises a support rod (801) fixed to the inner wall of the heat exchange chamber (101), a scraper (802) is rotatably connected to the side of the support rod (801), a bottom plate (803) is fixed to the lower surface of the scraper (802), a baffle (805) is also fixed to the side of the support rod (801), and the baffle (805) is arranged on the upper surface of the bottom plate (803); a second sewage outlet (806) is provided on the surface of the bottom plate (803), and a first sewage outlet (105) is provided on the surface of the heat exchange chamber (101), and the first sewage outlet (105) can be movably connected to the second sewage outlet (806); The filter assembly (6) comprises a support frame (601) fixed to the inner wall of the heat exchange chamber (101) and a filter plate (602) clamped on the surface of the support frame (601); the filter assembly (6) is fixed inside the heat exchange chamber (101) via a fixing assembly (7).

2. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 1, Features: A second placement groove (804) is provided inside the heat exchange cylinder (8), a first placement groove (104) is provided on the surface of the heat exchange chamber (101), the first placement groove (104) is connected to the second placement groove (804), an electromagnet (11) is installed inside the second placement groove (804), the electromagnet (11) is "U"-shaped, the N and S poles of the electromagnet (11) are gradually reversed, and the scraper (802) is made of magnet.

3. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 1, Features: A first slider (603) is fixed on the lower surface of the filter plate (602), a first slide groove is provided on the surface of the support frame (601), the first slider (603) moves in the first slide groove, the first slider (603) and the first slide groove of the filter plate (602) move on the surface of the support frame (601), there are two first sliders (603) and two first slide grooves, and they are symmetrically arranged on the lower surface of the filter plate (602), and a movable groove corresponding to the filter plate (602) is provided on the surface of the processing box (1), and the movable groove is "H" shaped.

4. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 1, Features: The fixing assembly (7) comprises a knob (701) arranged on the surface of the processing box (1); a transmission chamber (103) is provided inside the processing box (1); a threaded rod (702) is fixed at the lower end of the knob (701); the lower end of the threaded rod (702) is rotatably inserted into the transmission chamber (103); a threaded tube (703) is threadedly connected to the surface of the threaded rod (702); a pushing block (704) is fixed at the lower end of the threaded tube (703); a telescopic groove (604) is provided on the surface of the support frame (601); the telescopic groove (604) is connected to the transmission chamber (103); a first limiting rod (705) is provided below the pushing block (704); the first limiting rod (705) is provided in the telescopic groove (604).

5. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 4, Features: The filter plate (602) is provided with a first slot (605) on its surface, one end of the first limiting rod (705) is clamped in the first slot (605), the first limiting rod (705) and the pushing block (704) are perpendicular to each other, the first limiting rod (705) is also sleeved with a first spring (706) on its surface, a second slider (707) is fixed to the side of the threaded tube (703), a second slide groove is provided on the surface of the transmission bin (103), the second slider (707) moves in the second slide groove, the threaded tube (703) moves in the transmission bin (103) through the knob (701), the threaded rod (702), the second slider (707) and the second slide groove, and there are two of each of the second slider (707) and the second slide groove, which are symmetrically arranged on both sides of the threaded tube (703).

6. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 1, Features: The processing box (1) has a mounting groove (107) on its lower surface, the upper end of the collection box (9) is clamped in the mounting groove (107), the processing box (1) has a limiting groove (106) on the side of the mounting groove (107), the limiting assembly (10) comprises a slide bar (1001) fixed inside the limiting groove (106), a second limiting rod (1002) is sleeved on the surface of the slide bar (1001), a shifting block (1003) is fixed on the side of the second limiting rod (1002), a second clamping groove is provided on the side of the collection box (9), one end of the second limiting rod (1002) is clamped in the second clamping groove.

7. A circulating heat exchange device for a heat exchange station in a thermal power plant according to claim 6, Features: The surface of the slide rod (1001) is sleeved with a second spring (1004), and the lower surface of the processing box (1) is also provided with a movable groove (1005), the movable groove (1005) is connected to the limiting groove (106), and the shifting block (1003) is inserted into the movable groove (1005). There are two limiting assemblies (10), two mounting grooves (107) and two limiting grooves (106), and they are symmetrically arranged on both sides of the collection box (9).

8. The circulating heat exchange device of a heat exchange station in a thermal power plant according to claim 1, Features: One end of the primary network return water pipe (2) and the secondary network return water pipe (3) respectively penetrate the treatment box (1) and the heat exchange tube (8); the surface of the treatment box (1) and the surface of the heat exchange tube (8) are both provided with through holes (102) corresponding to the primary network return water pipe (2) and the secondary network return water pipe (3); the other end of the primary network return water pipe (2) is connected to the heat source body (4); and the other end of the secondary network return water pipe (3) is connected to the heat extraction device body (5).

9. A circulating heat exchange device for a heat exchange station in a thermal power plant according to any one of claims 1 to 8, Features: The heat exchange method of the circulating heat exchange device of the heat exchange station of the thermal power plant is as follows: The hot water in the heat source body (4) enters the treatment box (1) through the primary network return water pipe (2) and fully exchanges heat with the cold water in the heat exchange cylinder (8), and then flows back to the heat source body (4) through the primary network return water pipe (2). After being fully heated, the water in the heat exchange cylinder (8) enters the heat extraction device body (5) through the secondary network return water pipe 3. After the user obtains the heat, the water is pumped through the secondary network return water pipe (3) and then enters the heat exchange cylinder (8) through the circulation pump, thereby realizing cyclic heat exchange; The N and S poles of the electromagnet (11) are controlled so that the electromagnet (11) and the scraper (802) are attracted to each other, thereby driving the scraper (802) to rotate. When the scraper (802) rotates to the side of the electromagnet (11), the magnetic poles of the electromagnet (11) are adjusted so that the electromagnet (11) and the scraper (802) are repelled by the same polarity, thereby driving the scraper (802) to rotate, thereby realizing the circular motion of the scraper (802), thereby scraping the inner wall of the heat exchange cylinder (8). At the same time, the scale scraped off falls on the bottom plate (803). In the process of the bottom plate (803) following the rotation of the scraper (802), it is blocked by the baffle (805) and falls into the second sewage outlet (806). When the first sewage outlet (105) is connected to the second sewage outlet (806), the scale falls into the collection box (9); Secondly, when the hot water in the heat source body (4) enters the treatment box (1) via the primary network return water pipe (2), the hot water is filtered by the filter assembly (6). When the filter plate (602) needs to be replaced, it is only necessary to turn the knob (701) to drive the threaded rod (702) to rotate, and the threaded rod (702) drives the threaded tube (703) and the push block (704) fixed at one end of the threaded tube (703) to move upward, so that the push block (704) is separated from the first limiting rod (705). Under the rebound force of the first spring (706), the first limiting rod (705) is pushed out of the first slot (605). At this time, the filter plate (602) is moved from the left side to the right side, and a new filter plate (602) is installed at the left side. After the knob (701) is turned in the opposite direction to fix the filter plate (602) on the left side, the filter plate (602) on the right side is taken out from the movable slot.

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