Coal-fired power plant waste heat recovery and energy storage comprehensive optimization device and method

Abstract

The invention discloses a coal-fired power plant waste heat recovery and energy storage comprehensive optimization device and method.The coal-fired power plant waste heat recovery and energy storage comprehensive optimization device comprises a heat recovery and energy storage box, a metal heat conduction embedding base is fixedly connected into the heat recovery and energy storage box, and an energy storage heating device is connected into the metal heat conduction embedding base in an embedded mode; according to the device and the method, all-directional plugging and heat preservation can be carried out on heat in the recovery device, and the heat recovery efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery and energy storage, and relates to a waste heat recovery and energy storage comprehensive optimization device and method for a coal-fired power plant. Background Art

[0002] Coal-fired power plants consume a lot of fuel during the power generation process, but there will also be some energy loss during the power generation process, that is, waste heat is generated. The main sources of waste heat are as follows: the waste gas generated by the combustion of fuel in the generator set and the exhaust gas from the boiler can use waste heat, and the temperature is usually above 200°C; the waste water generated by the power plant will still be maintained at a temperature above 50°C after high-temperature disinfection, and these high-temperature waste waters can be recycled and reused through waste heat; a certain amount of lubricating oil will be used in the operation of the unit equipment of the power plant, and waste heat is also used to regenerate electricity to achieve the purpose of environmental protection and energy saving. In order to save energy consumption, the above waste heat can be classified and stored in a waste heat collection device, and recycled and reused using special equipment.

[0003] When the waste heat recovery and energy storage comprehensive optimization device of a coal-fired power plant is in use, the heat can usually only be transferred into the box for sealed energy storage, which causes the heat to be easily affected by external factors and cooled, and the recovered heat cannot be stored for energy reuse. At the same time, when the waste heat recovery and energy storage comprehensive optimization device of a coal-fired power plant is in use, the heat in the recovery device cannot be fully sealed and insulated, resulting in excessive heat loss and reduced heat recovery efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a device and method for comprehensive optimization of waste heat recovery and energy storage in a coal-fired power plant, which can fully seal and insulate the heat in the recovery device to improve the heat recovery efficiency.

[0005] To achieve the above-mentioned purpose, the present invention discloses a waste heat recovery and energy storage comprehensive optimization device for a coal-fired power plant, comprising a heat recovery energy storage box, a metal heat conduction inserting seat is fixedly connected inside the heat recovery energy storage box, an energy storage heating device is insertingly connected inside the metal heat conduction inserting seat, and a heat preservation adsorption sleeve is sleeved on the side surface of the energy storage heating device;

[0006] A heat recovery serpentine tube is fixedly connected inside the heat recovery energy storage box, and the output end of the heat recovery serpentine tube is fixedly connected to a metal heat conduction fitting seat, a heat input box is fixedly connected to the front surface of the heat recovery energy storage box, an entry head is fixedly connected inside the heat input box, and the entry head is fixedly connected to the input end of the heat recovery serpentine tube, a connecting tube is fixedly connected to the front surface of the heat input box, a sealing plate is movably connected inside the connecting tube, a rotating rod is fixedly connected to the upper surface of the sealing plate, a heat output box is fixedly connected to the rear surface of the heat recovery energy storage box, and a sealing baffle is slidably connected inside the heat output box.

[0007] Furthermore, both sides of the heat recovery energy storage box are fixedly connected with an embedding seat, and the interior of the embedding seat is embeddingly connected with a heat-insulating embedding plate.

[0008] Furthermore, first threaded connection plates are fixedly connected to both sides of the heat recovery energy storage box, and the first threaded connection plates are located above the engaging seat, and the upper surface of the heat recovery energy storage box is open.

[0009] Furthermore, a cover plate is embedded and connected to the upper surface of the heat recovery energy storage box, and second threaded connecting plates are fixedly connected to both sides of the cover plate. The internal threads of the second threaded connecting plate are connected to a threaded rod, and the threaded rod is threadedly connected to the first threaded connecting plate.

[0010] Furthermore, a water inlet pipe is fixedly connected to the upper surface of the cover plate, and the water inlet pipe is in communication with the energy storage heating device.

[0011] Furthermore, a piston is embedded in the water inlet pipe, a fitting plate is provided on the upper surface of the piston, horizontal plates are fixedly connected to both sides of the fitting plate, and an embedding rod is fixedly connected to the lower surface of the horizontal plate.

[0012] Furthermore, a rubber fitting sleeve is provided on the upper surface of the cover plate, and the rubber fitting sleeve is fitted and connected to the fitting rod.

[0013] Furthermore, an opening is provided inside the blocking baffle, and a limiting plate is embedded and connected inside the opening.

[0014] Furthermore, a connecting rod is fixedly connected to the interior of the heat output box, and a fan is fixedly connected to one end of the connecting rod away from the heat output box;

[0015] The energy storage heating device is slidably connected to a frame inside, and thermal insulation cotton is arranged inside the frame.

[0016] The present invention discloses a comprehensive optimization method for waste heat recovery and energy storage in a coal-fired power plant, comprising the following steps:

[0017] When storing the recovered heat, the energy storage heating device is embedded into the interior of the metal heat conduction embedding seat, and an appropriate amount of water is added to the energy storage heating device. The waste heat recovered by the heat recovery energy storage box is used to heat the water in the energy storage heating device. The heat in the energy storage heating device is insulated by the thermal absorption sleeve and thermal insulation cotton, and the heat in the heat recovery energy storage box is absorbed at the same time.

[0018] The present invention has the following beneficial effects:

[0019] In the specific operation of the waste heat recovery and energy storage comprehensive optimization device and method for coal-fired power plants described in the present invention, when storing the recovered heat, the energy storage heating device is embedded in the interior of the metal heat conduction embedding seat, and an appropriate amount of water is added to the energy storage heating device. The connecting pipe is opened, so that the heat in the waste heat collection device can enter the interior of the heat input box through the connecting pipe, and the heat can enter the interior of the heat recovery serpentine tube through the entry head to recover the waste heat collection device, and the output end of the heat recovery serpentine tube is connected to the metal heat conduction embedding seat, so that the heat in the heat recovery serpentine tube can enter the metal heat conduction embedding seat. Since the metal heat conduction embedding seat and the energy storage heating device are both made of metal, the high thermal conductivity allows the heat in the metal heat conduction embedding seat to be conducted to the energy storage heating device, so that the energy storage heating device can heat the water to facilitate the storage of the heat recovered in the heat recovery energy storage box. The heat in the energy storage heating device can be insulated by using the thermal insulation adsorption sleeve and the thermal insulation cotton, and the heat in the heat recovery energy storage box can be absorbed at the same time, thereby improving the energy storage efficiency of the heat of the energy storage heating device.

[0020] Furthermore, the present invention engages the piston into the interior of the water inlet pipe to seal the water inlet pipe. When the piston continuously moves downward to seal the water inlet pipe, the fitting plate can drive the cross plate and the fitting rod to move downward together. When the fitting rod moves downward, the fitting rod can be fitted into the interior of the rubber fitting sleeve to fix the piston and the fitting plate. The sealing plate is rotated so that it can seal the connecting pipe. The sealing baffle is pushed downward so that it can seal the heat output box, so that the device can be fully sealed. When heat is being recovered, the heat-insulating fitting plate can be fitted into the interior of the fitting seat to fit the surface of the heat recovery energy storage box, so that it can insulate the heat in the heat recovery energy storage box. The recovery device is sealed with the piston, the sealing plate and the sealing baffle, so that the heat in the heat recovery energy storage box is not easy to leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the split structure of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0024] Figure 3 This is a schematic diagram of the disassembled structure of the energy storage heating device 6 of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the heat recovery energy storage box 1 of the present invention;

[0026] Figure 5 It is a rear view structural schematic diagram of the present invention;

[0027] Figure 6 for Figure 5 Schematic diagram of the structure at point B in the middle.

[0028] Among them, 1. heat recovery energy storage box; 2. thermal insulation adsorption sleeve; 3. second threaded connecting plate; 4. cover plate; 5. threaded rod; 6. energy storage heating device; 7. heat input box; 8. connecting pipe; 9. fitting seat; 10. thermal insulation fitting plate; 11. first threaded connecting plate; 12. water inlet pipe; 13. piston; 14. fitting plate; 15. horizontal plate; 16. fitting rod; 17. rubber fitting sleeve; 18. heat recovery serpentine tube; 19. entry head; 20. rotating rod; 21. sealing plate; 22. metal heat conduction fitting seat; 23. connecting rod; 24. fan; 25. heat output box; 26. sealing baffle; 27. opening; 28. limit plate; 29. ​​thermal insulation cotton; 30. frame. DETAILED DESCRIPTION

[0029] 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 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.

[0030] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0033] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0034] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0037] refer to Figures 1 to 6 The waste heat recovery and energy storage comprehensive optimization device of the coal-fired power plant of the present invention comprises a heat recovery energy storage box 1, a metal heat conduction inserting seat 22 is fixedly connected in the heat recovery energy storage box 1, an energy storage heating device 6 is insertingly connected in the metal heat conduction inserting seat 22, a side of the energy storage heating device 6 is sleeved with a heat preservation adsorption sleeve 2, a plurality of frames 30 are slidably connected in the energy storage heating device 6, and a heat preservation cotton 29 is arranged in the frame 30. When the recovered heat is stored, the energy storage heating device 6 is insertingly connected in the metal heat conduction inserting seat 22, and a proper amount of water is added into the energy storage heating device 6, and the waste heat recovered by the heat recovery energy storage box 1 is used to heat the water in the energy storage heating device 6. The heat storage device 6 is heated by using the heat-insulating adsorption sleeve 2 and the heat-insulating cotton 29 to insulate the heat in the energy storage heating device 6, and the heat in the heat recovery energy storage box 1 is absorbed at the same time, thereby improving the energy storage efficiency of the heat storage heating device 6. The heat recovery energy storage box 1 is fixedly connected with a first threaded connecting plate 11 on both sides, and the first threaded connecting plate 11 is located above the fitting seat 9. The upper surface of the heat recovery energy storage box 1 is open, and a cover plate 4 is fitted and connected to the upper surface of the heat recovery energy storage box 1. The cover plate 4 is fixedly connected with a second threaded connecting plate 3 on both sides. The second threaded connecting plate 3 is threadedly connected to the first threaded connecting plate 11 through a threaded rod 5. The upper surface of the cover plate 4 is fixedly connected with The water inlet pipe 12 is connected to the energy storage heating device 6. The piston 13 is connected to the inside of the water inlet pipe 12. The upper surface of the piston 13 is provided with a fitting plate 14. Both sides of the fitting plate 14 are fixedly connected with a transverse plate 15. The lower surface of the transverse plate 15 is fixedly connected with a fitting rod 16. The upper surface of the cover plate 4 is provided with a rubber fitting sleeve 17, and the rubber fitting sleeve 17 is sleeved with the fitting rod 16. The cover plate 4 is fitted with the heat recovery energy storage box 1 so that the first threaded connecting plate 11 and the second threaded connecting plate 3 can fit together. The threaded rod 5 is screwed so that it can penetrate the second threaded connecting plate 3 and extend into the interior of the first threaded connecting plate 11 to connect the cover plate 4 with the heat recovery energy storage box 1. When the device recovers external heat, the water inlet pipe 12 is connected to the energy storage heating device 6 so that water can be added to the energy storage heating device 6 through the water inlet pipe 12 for energy storage. After the water is added, the piston 13 is inserted into the water inlet pipe 12 to block the water inlet pipe 12. When the piston 13 continues to move downward to block the water inlet pipe 12, the fitting plate 14 drives the cross plate 15 and the fitting rod 16 to move downward together. When the fitting rod 16 moves downward, the fitting rod 16 can be inserted into the rubber fitting sleeve 17 to fix the piston 13 and the fitting plate 14, so that the heat in the energy storage heating device 6 is not easy to leak from the water inlet pipe 12.

[0038] The heat recovery energy storage box 1 is fixedly connected to a heat recovery serpentine tube 18, and the output end of the heat recovery serpentine tube 18 is fixedly connected to a metal heat conduction fitting seat 22. The front surface of the heat recovery energy storage box 1 is fixedly connected to a heat input box 7, and the inside of the heat input box 7 is fixedly connected to an entry head 19, and the entry head 19 is fixedly connected to the input end of the heat recovery serpentine tube 18. The front surface of the heat input box 7 is fixedly connected to a connecting tube 8, and the inside of the connecting tube 8 is movably connected to a blocking plate 21, and the upper surface of the blocking plate 21 is fixedly connected to a rotating rod 20. The rear surface of the heat recovery energy storage box 1 is fixedly connected to a heat output box 2 5. The heat output box 25 is slidably connected with a blocking baffle 26, and an opening 27 is provided inside the blocking baffle 26. The opening 27 is internally connected with a limit plate 28. The heat output box 25 is fixedly connected with a connecting rod 23. The end of the connecting rod 23 away from the heat output box 25 is fixedly connected with a fan 24. Both sides of the heat recovery energy storage box 1 are fixedly connected with a fitting seat 9. The fitting seat 9 is internally connected with a heat preservation fitting plate 10. The connecting pipe 8 is connected to the waste heat collection device. When the waste heat collection device is used outside, the rotating rod 20 is rotated to allow the blocking plate 21 to rotate to one side to open the connecting pipe 8. The heat in the waste heat collection device enters the interior of the heat input box 7 through the connecting pipe 8, and the heat enters the interior of the heat recovery serpentine tube 18 through the entry head 19 to recover the waste heat collection device, and the output end of the heat recovery serpentine tube 18 is connected to the metal heat conduction embedded seat 22, so that the heat in the heat recovery serpentine tube 18 can enter the metal heat conduction embedded seat 22. Since the metal heat conduction embedded seat 22 and the energy storage heating device 6 are both made of metal, the heat conductivity is high, so that the heat in the metal heat conduction embedded seat 22 can be conducted to the energy storage heating device 6, so that the energy storage heating device 6 can heat the water and store energy. After the heating device 6 has completed energy storage, the blocking baffle 26 can be dragged upward so that the blocking baffle 26 can be extended from the heat output box 25, and the limiting plate 28 is passed through the interior of the limiting plate 28 through the opening 27 to limit the extension height of the blocking baffle 26, and the fan 24 is connected to an external power supply, and the fan 24 is started so that it can output and use the stored heat in the energy storage heating device 6, thereby facilitating the recovery and utilization of heat. When the heat is being recovered, the thermal insulation interlocking plate 10 can be interlocked into the interior of the interlocking seat 9 to fit the surface of the heat recovery energy storage box 1, so that it can insulate the heat in the heat recovery energy storage box 1.

[0039] When in use, the energy storage heating device 6 is inserted into the interior of the metal heat conduction inserting seat 22, and a proper amount of water is added to the energy storage heating device 6. The cover plate 4 is inserted into the heat recovery energy storage box 1, so that the first threaded connecting plate 11 and the second threaded connecting plate 3 can fit together, and the threaded rod 5 is screwed so that it can penetrate the second threaded connecting plate 3 and extend into the interior of the first threaded connecting plate 11 to connect and fix the cover plate 4 and the heat recovery energy storage box 1. When the device recovers external heat, the piston 13 can be inserted into the interior of the water inlet pipe 12 to fix the water inlet pipe 12. When the piston 13 continuously moves downward to block the water inlet pipe 12, the fitting plate 14 can drive the horizontal plate 15 and the fitting rod 16 to move downward together. When the fitting rod 16 moves downward, the fitting rod 16 can be fitted into the inside of the rubber fitting sleeve 17 to fix the piston 13 and the fitting plate 14, and the connecting pipe 8 is connected to the waste heat collection device. The rotating rod 20 is rotated to allow the sealing plate 21 to rotate to one side, and the connecting pipe 8 is opened, so that the heat in the waste heat collection device enters the heat input box 7 through the connecting pipe 8. The heat enters the heat recovery serpentine tube 18 through the inlet head 19 to recover the waste heat collection device, and the output end of the heat recovery serpentine tube 18 is connected to the metal heat conduction embedded seat 22, so that the heat in the heat recovery serpentine tube 18 can enter the metal heat conduction embedded seat 22, and the heat in the metal heat conduction embedded seat 22 can be conducted to the energy storage heating device 6, so that the energy storage heating device 6 can heat the water and store energy. When the energy storage heating device 6 has finished storing energy, the blocking baffle 26 can be pulled upward to make the blocking baffle 26 It can extend from the heat output box 25, and the limiting plate 28 passes through the inside of the limiting plate 28 through the opening 27 to limit the extending height of the blocking baffle 26, and the fan 24 is connected to the external power supply, and the fan 24 is started so that it can output the stored heat in the energy storage heating device 6 for use, thereby facilitating the recovery and utilization of heat. When the heat is recovered, the thermal insulation interlocking plate 10 can be interlocked into the inside of the interlocking seat 9 to fit the surface of the heat recovery energy storage box 1, so that it can insulate the heat in the heat recovery energy storage box 1.

[0040] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0041] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant, characterized in that: It comprises a heat recovery energy storage box (1), a metal heat conduction inserting seat (22) being fixedly connected inside the heat recovery energy storage box (1), an energy storage heating device (6) being insertingly connected inside the metal heat conduction inserting seat (22), and a heat preservation adsorption sleeve (2) being sleeved on the side surface of the energy storage heating device (6); The heat recovery energy storage box (1) is fixedly connected to a heat recovery serpentine tube (18) inside, and the output end of the heat recovery serpentine tube (18) is fixedly connected to a metal heat conduction socket (22). The front surface of the heat recovery energy storage box (1) is fixedly connected to a heat input box (7), and the heat input box (7) is fixedly connected to an entry head (19), and the entry head (19) is fixedly connected to the input end of the heat recovery serpentine tube (18). The front surface of the heat input box (7) is fixedly connected to a connecting pipe (8), and the connecting pipe (8) is movably connected to a sealing plate (21) inside, and the upper surface of the sealing plate (21) is fixedly connected to a rotating rod (20). The rear surface of the heat recovery energy storage box (1) is fixedly connected to a heat output box (25), and the heat output box (25) is slidably connected to a sealing baffle (26).

2. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 1 is characterized in that: Both sides of the heat recovery energy storage box (1) are fixedly connected with an embedding seat (9), and the interior of the embedding seat (9) is embeddingly connected with a heat-insulating embedding plate (10).

3. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 1, characterized in that: Both sides of the heat recovery energy storage box (1) are fixedly connected with a first threaded connection plate (11), and the first threaded connection plate (11) is located above the engaging seat (9), and the upper surface of the heat recovery energy storage box (1) is open.

4. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 3 is characterized in that: The upper surface of the heat recovery energy storage box (1) is embedded with a cover plate (4), and the two sides of the cover plate (4) are fixedly connected with a second threaded connecting plate (3), the inner thread of the second threaded connecting plate (3) is connected with a threaded rod (5), and the threaded rod (5) is threadedly connected to the first threaded connecting plate (11).

5. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 4 is characterized in that: A water inlet pipe (12) is fixedly connected to the upper surface of the cover plate (4), and the water inlet pipe (12) is in communication with the energy storage heating device (6).

6. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 5, characterized in that: A piston (13) is embedded in the water inlet pipe (12), a fitting plate (14) is provided on the upper surface of the piston (13), transverse plates (15) are fixedly connected to both sides of the fitting plate (14), and an embedding rod (16) is fixedly connected to the lower surface of the transverse plate (15).

7. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 4, characterized in that: A rubber fitting sleeve (17) is provided on the upper surface of the cover plate (4), and the rubber fitting sleeve (17) is fitted and connected to the fitting rod (16).

8. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 1, characterized in that: An opening (27) is provided inside the blocking baffle (26), and a limiting plate (28) is embedded and connected inside the opening (27).

9. The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 1, characterized in that: The heat output box (25) is fixedly connected to a connecting rod (23) inside, and an end of the connecting rod (23) away from the heat output box (25) is fixedly connected to a fan (24); The energy storage heating device (6) is slidably connected to a frame (30) inside, and thermal insulation cotton (29) is arranged inside the frame (30).

10. A comprehensive optimization method for waste heat recovery and energy storage in a coal-fired power plant, characterized in that: The comprehensive optimization device for waste heat recovery and energy storage in a coal-fired power plant according to claim 1 comprises the following steps: When storing the recovered heat, the energy storage heating device (6) is inserted into the interior of the metal heat conduction inserting seat (22), and a suitable amount of water is added to the energy storage heating device (6). The waste heat recovered by the heat recovery energy storage box (1) is used to heat the water in the energy storage heating device (6). The heat in the energy storage heating device (6) is insulated by the heat insulation adsorption sleeve (2) and the heat insulation cotton (29), and the heat in the heat recovery energy storage box (1) is absorbed at the same time.

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