A waste heat utilization energy storage system for the printing and dyeing industry

Abstract

The present invention discloses a waste heat utilization energy storage system for the printing and dyeing industry, aiming to solve the deficiency of low waste heat utilization rate in the printing and dyeing industry, resulting in energy consumption waste. The invention includes a waste heat heat exchanger and a solar heating device. The waste heat heat exchanger is provided with a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The solar heating device includes a heating pipe and a solar heating plate laid on the heating pipe; the printing and dyeing industrial wastewater enters from the hot end inlet and exits from the hot end outlet, and cold water enters from the cold end inlet, is heated by the printing and dyeing industrial wastewater in the waste heat heat exchanger, exits from the cold end outlet, and is transported to the heating pipe of the solar heating device; the water flow is further heated by passing through the heating pipe and then distributed to the hot water pipe network. The waste heat utilization energy storage system for the printing and dyeing industry of the present application can make full use of the waste heat in the printing and dyeing industry and avoid waste of energy consumption.

Description

Technical Field

[0001] The present invention relates to a waste heat utilization technology, and more specifically, to an energy storage system for waste heat utilization in the printing and dyeing industry. Background Art

[0002] The problems of energy consumption and pollution emission are the main problems faced by the current industrial development. Improving the effective use efficiency of energy is one of the important methods to achieve the sustainable development of society. In industrial production, the printing and dyeing textile industry is an indispensable part of economic development and people's livelihood guarantee. However, the printing and dyeing industry generally has the characteristics of high energy consumption and high emissions. In particular, the total amount of printing and dyeing wastewater generated is huge, which is one of the main sources of industrial wastewater emissions in China. The production process in the printing and dyeing industry is complex, and a large amount of high-temperature hot water and steam are consumed in different processes. Although the printing and dyeing industry is a large energy consumer, only a small part of the waste heat can be effectively utilized during the production process. Most of the heat generated during the production process is released into the natural environment in the form of waste steam and waste hot water. The waste heat carried in the discharged wastewater will not only cause serious water pollution, but also cause a large amount of heat resource waste, increase the energy consumption burden, have a negative impact on the efficient utilization of energy, and cause immeasurable losses to environmental protection and economic benefits.

[0003] Effectively recovering the waste heat in the printing and dyeing wastewater can effectively promote the development of energy conservation and emission reduction technologies. The discharge temperature of the industrial wastewater in the printing and dyeing industry generally ranges from 30 to 40 degrees Celsius. The heat energy at this grade cannot be directly recycled for industrial production and daily life. Nowadays, using heat pump technology to upgrade the heat energy of low-grade heat sources to high-grade heat sources is an energy-saving technology mainly applied to waste heat recovery. Its process is a heat pump compression technology driven by electricity. Through the linkage cycle of each component of the heat pump system, the transfer and supplement of heat are realized, and the purpose of producing high-temperature hot water and then supplying it to enterprises for use is achieved. This technology can effectively reduce the environmental heat pollution of wastewater and improve the utilization of waste heat. However, the production process still completely depends on the input of external electric energy, which will increase the power consumption load and power consumption pressure during the peak electricity consumption period. Moreover, the application of heat pump technology and the like can effectively increase the temperature of hot water, but it is still limited to the change of heat energy grade and cannot achieve the purpose of converting it into high-grade electric energy and realizing further electric energy storage and application.

[0004] The waste heat of the printing and dyeing industry's wastewater needs to be effectively recovered and utilized. The technology for improving the grade of waste heat urgently needs to explore new development directions. The combination of waste heat recovery, clean energy utilization and energy storage technology is an effective means to achieve waste heat recovery and efficient energy utilization. The research on related systems and technologies is an important content for reducing environmental pollution and industrial energy waste. Summary of the Invention

[0005] The present invention overcomes the deficiency of low utilization rate of waste heat in the printing and dyeing industry, resulting in energy consumption waste, and provides a waste heat utilization energy storage system for the printing and dyeing industry, which can make full use of the waste heat in the printing and dyeing industry and avoid waste of energy consumption.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A waste heat utilization energy storage system for the printing and dyeing industry includes a waste heat heat exchanger and a solar heating device. The waste heat heat exchanger is provided with a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The solar heating device includes a heating pipe and a solar heating plate laid on the heating pipe. The printing and dyeing industrial wastewater enters from the hot end inlet and exits from the hot end outlet. Cold water enters from the cold end inlet, is heated by the printing and dyeing industrial wastewater in the waste heat heat exchanger, exits from the cold end outlet, and is conveyed to the heating pipe of the solar heating device. The water flow is further heated by passing through the heating pipe and then distributed to the hot water pipe network.

[0007] The temperature of the wastewater discharged from the printing and dyeing industry generally ranges between 30 - 40 degrees Celsius and cannot be directly recycled. This wastewater heats the cold water flowing into the waste heat heat exchanger through the waste heat heat exchanger. After the cold water absorbs the waste heat of the printing and dyeing industrial wastewater in the waste heat heat exchanger, its temperature can rise by about 5 degrees Celsius. The heated cold water flows through the heating pipe on the solar heating device, and the solar heating plate is laid on the heating pipe. The solar heating plate absorbs the solar radiation heat to heat the water flow in the heating pipe, further increasing the water temperature. Then the water flow is distributed to the hot water pipe network for use. The waste heat utilization energy storage system for the printing and dyeing industry in this application can make full use of the waste heat in the printing and dyeing industry and avoid waste of energy consumption.

[0008] Preferably, a solar heat absorption layer is provided on the solar heating plate.

[0009] The setting of the solar heat absorption layer improves the absorption effect of solar radiation heat.

[0010] Preferably, heat preservation tanks are installed on both the front and rear pipelines of the solar heating device.

[0011] The setting of the heat preservation tanks enables the water flow to be transported smoothly and facilitates the adjustment of the flow rate.

[0012] Preferably, a water extraction pump is installed on the pipeline behind the hot end outlet, and a water delivery pump is installed on the pipeline in front of the cold end inlet. The setting of the water extraction pump can ensure the reliable transportation of the printing and dyeing industrial wastewater to the waste heat heat exchanger. The setting of the water delivery pump ensures the reliable transportation of cold water.

[0013] Preferably, a power generation heat exchange pipe is connected in parallel on the pipeline behind the solar heating device. The power generation heat exchange pipe is connected to a heat insulation seat, and a heat preservation cavity is provided in the heat insulation seat. The power generation heat exchange pipe is arranged in the heat preservation cavity. A thermoelectric generation device is connected to the heat insulation seat, and an insulating heat conducting plate is provided on the thermoelectric generation device. The insulating heat conducting plate is installed in the heat preservation cavity.

[0014] The water flow heated by the solar heating device can also be transported into the power generation heat exchange tube to heat the insulating heat conducting plate on the thermoelectric power generation device, so that the thermoelectric power generation device generates electricity. The thermal energy is converted into electrical energy through this structure.

[0015] Preferably, ethylene glycol is filled in the heat preservation cavity. Ethylene glycol has the characteristics of low density and low heat capacity, and can quickly heat up after absorbing heat, and has a good heating effect on the insulating heat conducting plate.

[0016] Preferably, a ceramic panel is oppositely arranged on the thermoelectric power generation device and the insulating heat conducting plate, and a plurality of PN junctions are installed between the ceramic panel and the insulating heat conducting plate, and adjacent PN junctions are connected in series through copper conducting sheets.

[0017] The ceramic panel maintains room temperature, the temperature of the insulating heat conducting plate rises after heating, there is a temperature difference between the ceramic panel and the insulating heat conducting plate, a thermoelectric potential is generated at both ends of the PN junction and electric energy is output. Through the series connection of copper conducting sheets, the total output voltage is obtained.

[0018] Preferably, the thermoelectric power generation device is connected to a power storage device.

[0019] The electric energy generated by the thermoelectric power generation device is transported to the power storage device for storage.

[0020] Preferably, the waste heat heat exchanger includes a fixed outer cylinder and a rotating inner cylinder. The rotating inner cylinder is rotatably installed in the fixed outer cylinder. A spiral guide groove is provided on the outer wall of the rotating inner cylinder. An inlet ring cavity and an outlet ring cavity are provided between the rotating inner cylinder and the fixed outer cylinder. The inlet ring cavity is communicated between one end of the spiral guide groove and the cold end inlet, and the outlet ring cavity is communicated between the other end of the spiral guide groove and the cold end outlet. The water flow drives the rotation of the rotating inner cylinder when flowing in the spiral guide groove; a differentially rotating shaft is rotatably installed in the rotating inner cylinder. The rotation of the rotating inner cylinder drives the differentially rotating shaft to rotate in the opposite direction. A heat exchange flow channel is formed between the outer wall of the differentially rotating shaft and the inner wall of the rotating inner cylinder. Both ends of the heat exchange flow channel are respectively communicated with the hot end inlet and the hot end outlet. An axially arranged arc-shaped protrusion is provided on the outer wall of the differentially rotating shaft, so that the cross section of the differentially rotating shaft is in a cam-shaped structure; axially arranged arc-shaped ribs are provided on the inner wall of the rotating inner cylinder. The surface of the arc-shaped rib is in an inwardly concave arc structure. The radial thickness of the arc-shaped rib gradually decreases from the middle circumference to both ends, and a smooth transition is formed between the circumferential two ends of the arc-shaped rib and the inner wall of the rotating inner cylinder.

[0021] During the long-term flow of the wastewater from the printing and dyeing industry in the waste heat exchanger, scale is likely to form, affecting the flow rate and heat exchange effect. In the technical solution of the present invention, cold water is transported into the waste heat exchanger and flows in the spiral guide groove to drive the rotation of the rotating inner cylinder. The rotation of the rotating inner cylinder drives the differential rotating shaft to rotate in the reverse direction. There are arc-shaped ridges on the inner wall of the heat exchange flow channel, and arc-shaped protrusions are provided on the outer wall of the differential rotating shaft. Therefore, the radial gap between the outer wall of the differential rotating shaft and the inner wall of the rotating inner cylinder is constantly changing. During the flow of the wastewater from the printing and dyeing industry in the heat exchange flow channel, the water flow is affected by the continuously changing radial gap, and is disturbed in the heat exchange flow channel, continuously impacting the inner wall of the rotating inner cylinder and the outer wall of the differential rotating shaft, preventing scale from forming on the inner wall of the rotating inner cylinder and the outer wall of the differential rotating shaft. In addition, after the wastewater is disturbed, the temperature is more uniform, thereby improving the heat exchange effect.

[0022] Preferably, connecting heads are provided at both ends of the differential rotating shaft. The two connecting heads respectively extend out of both ends of the rotating inner cylinder. Mounting seats are installed at both ends of the fixed outer cylinder. A transition gear disk is installed on the mounting seat. An internal gear ring is provided at the edge of the transition gear disk, and a driving small gear is provided in the middle of the transition gear disk. A driven large gear is provided on the connecting head. Driving gear rings are provided at both ends of the movable inner cylinder. The driving gear rings are in meshing fit with the internal gear ring, and the driving small gear is in meshing fit with the driven large gear.

[0023] Through this structural arrangement, the rotation of the rotating inner cylinder drives the differential rotating shaft to rotate in the reverse direction, and the rotation is stable and reliable.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The waste heat utilization and energy storage system for the printing and dyeing industry of the present application can make full use of the waste heat of the printing and dyeing industry, avoiding waste of energy consumption; (2) The low-quality waste heat in the wastewater generated by the printing and dyeing industry is fully recovered. The use of efficient solar heating technology reduces the consumption of conventional energy. The reuse of high-temperature hot water reduces the waste heat emission pollution and saves energy consumption; (3) The hot water generated after the waste heat of the wastewater from the printing and dyeing industry is utilized is used for power generation by the thermoelectric generation device. The additional electric energy produced can be used for the power consumption of other devices, and can balance the power utilization during the peak power consumption period, having good environmental protection and economic benefits; (4) Scale is not easily generated during the long-term use of the waste heat exchanger, ensuring the smooth flow of water and the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the structural schematic diagram of the present invention;

[0026] Figure 2 is the schematic diagram of the solar heating device of the present invention;

[0027] Figure 3 is the structural diagram of the solar heat absorption layer of the present invention;

[0028] Figure 4 is the schematic diagram of the connection structure of the thermoelectric generation device of the present invention;

[0029] Figure 5 It is a schematic diagram of the power generation and heat exchange tube of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the waste heat exchanger in Embodiment 2 of the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of the rotating inner cylinder in Embodiment 2 of the present invention;

[0032] In the figure: 1. Waste heat exchanger, 2. Solar heating device, 3. Hot end inlet, 4. Hot end outlet, 5. Cold end inlet, 6. Cold end outlet, 7. Heating tube, 8. Solar heating panel, 9. Hot water pipe network, 10. Light collecting cover, 11. Tungsten metal base layer, 12. Silicon matrix layer, 13. Silicon cube structure layer, 14. Heat preservation tank, 15. Water extraction pump, 16. Water delivery pump, 17. Power generation and heat exchange tube, 18. Heat insulation seat, 19. Heat preservation cavity, 20. Thermoelectric generation device, 21. Insulating heat conducting plate, 22. Ceramic panel, 23. PN junction, 24. Copper conducting sheet, 25. Electricity storage device, 26. Fixed outer cylinder, 27. Rotating inner cylinder, 28. Spiral guide groove, 29. Inlet ring cavity, 30. Outlet ring cavity, 31. Differential rotating shaft, 32. Heat exchange flow channel, 33. Arc-shaped protrusion, 34. Arc-shaped rib, 35. Connector, 36. Mounting seat, 37. Transition gear disc, 38. Internal gear ring, 39. Driving small gear, 40. Driven large gear, 41. Driving gear ring, 42. Extension section, 43. Sealing ring, 44. Water inlet cavity, 45. Water outlet cavity, 46. Water inlet through hole, 47. Water outlet through hole. Detailed implementation manners

[0033] The technical solutions of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings:

[0034] Embodiment 1: A waste heat utilization and energy storage system for the printing and dyeing industry (see Appendix Figure 1 to Appendix Figure 5 ), which includes a waste heat exchanger 1 and a solar heating device 2. The waste heat exchanger is provided with a hot end inlet 3, a hot end outlet 4, a cold end inlet 5, and a cold end outlet 6. The solar heating device includes a heating tube 7 and a solar heating panel 8 laid on the heating tube; the printing and dyeing industrial wastewater enters from the hot end inlet and exits from the hot end outlet, and cold water enters from the cold end inlet, is heated by the printing and dyeing industrial wastewater in the waste heat exchanger, exits from the cold end outlet, and is transported to the heating tube of the solar heating device; the water flow is further heated by the heating tube and then distributed to the hot water pipe network 9.

[0035] A solar heat absorption layer is provided on the solar heating panel. The solar heat absorption layer includes a tungsten metal base layer 11, a silicon matrix layer 12, and a silicon cube structure layer 13 arranged in sequence from bottom to top. The thickness of the tungsten metal base layer is 1 mm, the thickness of the silicon matrix layer is 0.2 μm, the side length of the silicon cube in the silicon cube structure layer is 0.2 μm, and the distribution spacing is 0.2 μm, showing a regular periodic arrangement. A light collecting cover 10 is installed on the solar heating panel, and the light collecting cover is inclined. Heat preservation tanks 14 are installed on the pipelines on the front side and the rear side of the solar heating device. A water extraction pump 15 is installed on the pipeline behind the hot end outlet, and a water delivery pump 16 is installed on the pipeline in front of the cold end inlet. A flow regulating valve is installed on the pipeline in front of the hot end outlet, a flow regulating valve is installed on the pipeline between the water delivery pump and the cold end inlet, and a water inlet valve is installed on the pipeline in front of the water delivery pump. A flow regulating valve is installed on the pipeline between the front side of the heating pipe and the heat preservation tank, and a flow regulating valve is installed on the pipeline between the hot water pipe network and the heat preservation tank.

[0036] A power generation heat exchange pipe 17 is connected in parallel on the pipeline at the rear side of the solar heating device. The power generation heat exchange pipe is connected to a heat insulation seat 18. A heat preservation cavity 19 is provided in the heat insulation seat. The power generation heat exchange pipe is arranged in the heat preservation cavity. A thermoelectric power generation device 20 is connected to the heat insulation seat. An insulating heat conducting plate 21 is provided on the thermoelectric power generation device. The insulating heat conducting plate is installed in the heat preservation cavity. Ethylene glycol is filled in the heat preservation cavity. A ceramic panel 22 is arranged opposite to the insulating heat conducting plate on the thermoelectric power generation device. A number of PN junctions 23 are installed between the ceramic panel and the insulating heat conducting plate. Adjacent PN junctions are connected in series through copper conducting sheets 24. The thermoelectric power generation device is connected to a power storage device 25. The power storage device is a prior art and will not be elaborated in this article as long as it can achieve the function of storing electric energy. A flow regulating valve is installed on the pipeline between the power generation heat exchange pipe and the heat preservation tank. A flow regulating valve and a drain valve are installed in sequence on the pipeline behind the power generation heat exchange pipe.

[0037] The temperature of the wastewater discharged from the printing and dyeing industry is generally between 30 and 40 degrees Celsius and cannot be directly recycled. This wastewater heats the cold water flowing into the waste heat exchanger through the waste heat exchanger. The temperature of the cold water can rise by about 5 degrees Celsius after absorbing the waste heat of the printing and dyeing industry wastewater in the waste heat exchanger. The heated cold water flows through the heating pipe on the solar heating device. The solar heating panel is laid on the heating pipe. The solar heating panel absorbs the solar radiation heat to heat the water flow in the heating pipe, further increasing the water temperature. Then the water flow is distributed to the hot water pipe network for use. The water flow heated by the solar heating device can also be transported to the power generation heat exchange pipe to heat the insulating heat conducting plate on the thermoelectric power generation device, so that the thermoelectric power generation device generates electricity. The additional electric energy produced can be used for the electric energy consumption of other equipment and can balance the electric energy utilization during the peak electricity consumption period.

[0038] Example 2: A printing and dyeing industry waste heat utilization energy storage system (see attached Figure 6 、attached Figure 7),(which is similar to the solution of Embodiment 1. The main difference lies in the specific structure of the waste heat exchanger. In this embodiment, the waste heat exchanger includes a fixed outer cylinder 26 and a rotating inner cylinder 27. The rotating inner cylinder is rotatably installed in the fixed outer cylinder. A spiral guide groove 28 is provided on the outer wall of the rotating inner cylinder. An inlet annular cavity 29 and an outlet annular cavity 30 are provided between the rotating inner cylinder and the fixed outer cylinder. The inlet annular cavity is connected between one end of the spiral guide groove and the cold end inlet, and the outlet annular cavity is connected between the other end of the spiral guide groove and the cold end outlet. The water flow drives the rotation of the rotating inner cylinder when flowing in the spiral guide groove. A differentially rotating shaft 31 is rotatably installed inside the rotating inner cylinder. The rotation of the rotating inner cylinder drives the differentially rotating shaft to rotate in the opposite direction. A heat exchange flow channel 32 is formed between the outer wall of the differentially rotating shaft and the inner wall of the rotating inner cylinder. Both ends of the heat exchange flow channel are respectively connected to the hot end inlet and the hot end outlet. An axially arranged arc-shaped protrusion 33 is provided on the outer wall of the differentially rotating shaft, making the cross-section of the differentially rotating shaft in a cam-like structure. An axially arranged arc-shaped rib 34 is provided on the inner wall of the rotating inner cylinder. The surface of the arc-shaped rib is in an inwardly concave arc structure. The radial thickness of the arc-shaped rib gradually decreases from the middle circumferentially towards both ends. The circumferential two ends of the arc-shaped rib are smoothly transitioned with the inner wall of the rotating inner cylinder.

[0039] Both ends of the differentially rotating shaft are provided with connection heads 35. The two connection heads respectively extend out of the two ends of the rotating inner cylinder. Mounting seats 36 are installed at both ends of the fixed outer cylinder. A transition gear disc 37 is installed on the mounting seat. An internal gear ring 38 is provided at the edge of the transition gear disc. A driving small gear 39 is provided in the middle of the transition gear disc. A driven large gear 40 is provided on the connection head. Driving gear rings 41 are provided at both ends of the movable inner cylinder. The driving gear rings are meshed and matched with the internal gear ring. The driving small gear is meshed and matched with the driven large gear.

[0040] Both ends of the rotating inner cylinder are provided with extension segments 42. The outer diameter of the extension segment is smaller than the outer diameter of the rotating inner cylinder, so that both ends of the rotating inner cylinder are in a stepped shaft structure. The extension segment is rotatably installed on the mounting seat. A sealing ring 43 is provided at one end of the mounting seat. The sealing ring is hermetically installed between the inner wall of the fixed outer cylinder and the outer wall of the extension segment. An inlet annular cavity is formed between one end of the rotating inner cylinder and one sealing ring, and an outlet annular cavity is formed between the other end of the rotating inner cylinder and the other sealing ring. A water inlet cavity 44 is provided on the inner wall of one mounting seat, and a water outlet cavity 45 is provided on the inner wall of the other mounting seat. A number of water inlet through holes 46 are provided on one extension segment of the rotating inner cylinder corresponding to the water inlet cavity, and a number of water outlet through holes 47 are provided on the other extension segment of the rotating inner cylinder corresponding to the water outlet cavity. The water inlet through holes and the water outlet through holes are both communicated with the heat exchange flow channel.

[0041] During the long-term flow of printing and dyeing industrial wastewater in the waste heat exchanger, scale is likely to form, affecting the flow rate and heat exchange effect. In the technical solution of the present invention, cold water is transported to the waste heat exchanger and flows in the spiral guide groove to drive the rotation of the rotating inner cylinder. The rotation of the rotating inner cylinder drives the differential rotating shaft to rotate in the opposite direction. An arc-shaped convex strip is provided on the inner wall of the heat exchange flow channel, and an arc-shaped protrusion is provided on the outer wall of the differential rotating shaft. Therefore, the radial clearance between the outer wall of the differential rotating shaft and the inner wall of the rotating inner cylinder is constantly changing. During the flow of printing and dyeing industrial wastewater in the heat exchange flow channel, the water flow is affected by the continuously changing radial clearance, and is disturbed in the heat exchange flow channel, continuously impacting the inner wall of the rotating inner cylinder and the outer wall of the differential rotating shaft, preventing scale formation on the inner wall of the rotating inner cylinder and the outer wall of the differential rotating shaft. In addition, after the wastewater is disturbed, the temperature is more uniform, thereby improving the heat exchange effect.

[0042] The above-described embodiments are only preferred solutions of the present invention, and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. A waste heat utilization energy storage system for the printing and dyeing industry, characterized in that, It includes a waste heat heat exchanger and a solar heating device. The waste heat heat exchanger is provided with a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The solar heating device includes a heating pipe and a solar heating panel laid on the heating pipe; the printing and dyeing industrial wastewater enters from the hot end inlet and discharges from the hot end outlet, and cold water enters from the cold end inlet, is heated by the printing and dyeing industrial wastewater in the waste heat heat exchanger, then discharges from the cold end outlet and is conveyed to the heating pipe of the solar heating device; the water flow is further heated by passing through the heating pipe and then distributed to the hot water pipe network; the waste heat heat exchanger includes a fixed outer cylinder and a rotating inner cylinder. The rotating inner cylinder is rotatably installed in the fixed outer cylinder. A spiral guide groove is provided on the outer wall of the rotating inner cylinder, and the water flow flowing in the spiral guide groove drives the rotating inner cylinder to operate; a differentially rotating shaft rotatably arranged is installed in the rotating inner cylinder. The rotation of the rotating inner cylinder drives the differentially rotating shaft to rotate in the opposite direction. A heat exchange flow channel is formed between the outer wall of the differentially rotating shaft and the inner wall of the rotating inner cylinder. Axially arranged arc-shaped protrusions are provided on the outer wall of the differentially rotating shaft, making the cross-section of the differentially rotating shaft in a cam-like structure; axially arranged arc-shaped ridges are provided on the inner wall of the rotating inner cylinder.

2. The energy storage system for utilizing waste heat in the printing and dyeing industry according to claim 1, characterized in that, A solar heat absorption layer is provided on the solar heating panel.

3. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 1, characterized in that, Heat preservation tanks are installed on both the front and rear pipelines of the solar heating device.

4. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 1, characterized in that, A water extraction pump is installed on the pipeline behind the hot end outlet, and a water delivery pump is installed on the pipeline in front of the cold end inlet.

5. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 1, characterized in that, Power generation heat exchange pipes are connected in parallel on the pipeline behind the solar heating device. The power generation heat exchange pipes are connected to a heat insulation seat. A heat preservation cavity is provided in the heat insulation seat, and the power generation heat exchange pipes are arranged in the heat preservation cavity. A thermoelectric generation device is connected to the heat insulation seat. An insulating heat conduction plate is provided on the thermoelectric generation device, and the insulating heat conduction plate is installed in the heat preservation cavity.

6. The energy storage system for waste heat utilization in the printing and dyeing industry according to claim 5, characterized in that, Ethylene glycol is filled in the heat preservation cavity.

7. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 5, characterized in that, A ceramic panel is arranged opposite to the insulating heat conduction plate on the thermoelectric generation device. A number of PN junctions are installed between the ceramic panel and the insulating heat conduction plate, and adjacent PN junctions are connected in series through copper conducting sheets.

8. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 5, characterized in that, The thermoelectric generation device is connected to a power storage device.

9. A waste heat utilization energy storage system for the printing and dyeing industry according to any one of claims 1 to 8, characterized in that, An inlet ring cavity and an outlet ring cavity are provided between the rotating inner cylinder and the fixed outer cylinder. The inlet ring cavity is communicated between one end of the spiral guide groove and the cold end inlet, and the outlet ring cavity is communicated between the other end of the spiral guide groove and the cold end outlet. Both ends of the heat exchange flow channel are communicated with the hot end inlet and the hot end outlet respectively. The surface of the arc-shaped ridge is in an inward concave arc structure, and the radial thickness of the arc-shaped ridge gradually decreases from the middle circumferentially to both ends. The circumferential two ends of the arc-shaped ridge are smoothly transitioned with the inner wall of the rotating inner cylinder.

10. A waste heat utilization energy storage system for the printing and dyeing industry according to claim 9, characterized in that, Connectors are provided at both ends of the differentially rotating shaft. The two connectors respectively extend out of the two ends of the rotating inner cylinder. Mounting seats are installed at both ends of the fixed outer cylinder. Transition gear discs are installed on the mounting seats. An internal gear ring is provided on the edge of the transition gear disc, and a driving small gear is provided in the middle of the transition gear disc. Driven large gears are provided on the connectors. Driving gear rings are provided at both ends of the movable inner cylinder. The driving gear rings are meshed and matched with the internal gear ring, and the driving small gear is meshed and matched with the driven large gear.

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