Industrial waste heat steam supply device

Abstract

The invention discloses an industrial waste heat steam supply device, which relates to the technical field of industrial waste heat recovery and comprises a waste heat exchange system, a low-temperature heat storage system, a heat pump system, a high-temperature heat storage system and a steam generation system. The low-temperature heat storage system comprises a low-temperature heat storage module, a first heating loop and a first heat conveying loop which communicate with one another, and the first heating loop communicates with the second medium pipeline of the waste heat exchange system. The heat pump system comprises a first heat exchange system, a compressor and a second heat exchange system. A second medium pipeline of the first heat exchange system, the compressor and a first medium pipeline of the second heat exchange system are sequentially communicated end to end. The high-temperature heat storage system comprises a high-temperature heat storage module, a second heating loop and a second heat conveying loop which communicate with one another. The steam generation system comprises a third heat exchange system, a steam pocket and a first steam pipe. Large-range recycling of industrial waste heat is achieved through the heat pump coupling fused salt heat storage technology, the steam supply cost is reduced through off-peak electricity, and recycling of the waste heat is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste heat recovery, and particularly relates to an industrial waste heat steam supply device. Background Art

[0002] In the industrial production processes of high-energy-consuming industries such as iron and steel, cement, and aluminum smelting, a large amount of low-grade waste heat is generated. For example, in the production process of iron and steel enterprises, waste heat resources such as raw material sintering flue gas, pellet flue gas, rolling heating furnace flue gas, blast furnace hot blast stove flue gas, lime kiln flue gas, blast furnace slag water, and waste gas cooling water are generated, and the temperature is mostly between 50°C and 300°C. The total sum of the above waste heat resources accounts for about 33% of the total energy consumption in iron and steel production. Due to reasons such as low waste heat grade, dispersed heat sources, instability, and pollution, it is difficult to effectively recover and utilize the waste heat. Summary of the Invention

[0003] The main object of the present invention is to propose an industrial waste heat steam supply device, aiming to realize the recovery and utilization of waste heat.

[0004] To achieve the above object, the industrial waste heat steam supply device proposed by the present invention includes a waste heat heat exchange system, a low-temperature heat storage system, a heat pump system, a high-temperature heat storage system, and a steam generation system;

[0005] The first medium pipeline of the waste heat heat exchange system is used to connect to a waste heat heat source;

[0006] The low-temperature heat storage system includes a connected low-temperature heat storage module, a first heating circuit, and a first heat supply circuit. The first heating circuit is connected to the second medium pipeline of the waste heat heat exchange system;

[0007] The heat pump system includes a first heat exchange system, a compressor, and a second heat exchange system. The second medium pipeline of the first heat exchange system, the compressor, and the first medium pipeline of the second heat exchange system are connected end to end in sequence. The first heat supply circuit is connected to the first medium pipeline of the first heat exchange system. The working fluid in the heat pump system can expand and absorb heat in the first heat exchange system, and the compressor can pressurize the working fluid and introduce it into the first medium pipeline of the second heat exchange system;

[0008] The high-temperature heat storage system includes a connected high-temperature heat storage module, a second heating circuit, and a second heat supply circuit. The second heating circuit is connected to the second medium pipeline of the second heat exchange system;

[0009] The steam generation system includes a third heat exchange system, a steam drum, and a first steam pipe. The steam drum is connected to the second medium pipeline of the third heat exchange system. The second heat supply circuit is connected to the first medium pipeline of the second heat exchange system. The first steam pipe is connected to the steam drum.

[0010] In one embodiment, the waste heat exchange system includes a low-temperature waste heat exchanger and a high-temperature waste heat exchanger. The first medium pipeline of the low-temperature waste heat exchanger is used to connect to a low-temperature waste heat heat source, and the first medium pipeline of the high-temperature waste heat exchanger is used to connect to a high-temperature waste heat heat source;

[0011] The low-temperature heat storage module includes an atmospheric pressure heat storage tank and a pressurized heat storage tank;

[0012] The first heating circuit includes a first sub-heating circuit and a second sub-heating circuit. The first sub-heating circuit connects the second medium pipeline of the low-temperature waste heat exchanger and the atmospheric pressure heat storage tank, and the second sub-heating circuit connects the second medium pipeline of the high-temperature waste heat exchanger and the pressurized heat storage tank.

[0013] In one embodiment, the first heat exchange system includes a first turbine and at least one working fluid heat exchanger. The first turbine is drivingly connected to the compressor. The first medium pipeline of at least one working fluid heat exchanger is connected to the first heat supply circuit, and the second medium pipeline of at least one working fluid heat exchanger connects the first turbine and the compressor.

[0014] In one embodiment, the first heat exchange system further includes a second turbine. At least one working fluid heat exchanger includes a first working fluid heat exchanger. The second medium pipeline of the first working fluid heat exchanger connects the first turbine and the second turbine;

[0015] The low-temperature heat storage module includes a pressurized heat storage tank. The first heat supply circuit includes a second sub-heat supply circuit. The second sub-heat supply circuit connects the first medium pipeline of the first working fluid heat exchanger and the pressurized heat storage tank.

[0016] In one embodiment, the first heat exchange system further includes a second turbine. At least one working fluid heat exchanger includes a second working fluid heat exchanger. The second medium pipeline of the second working fluid heat exchanger connects the second turbine and the compressor. The first medium pipelines of the first working fluid heat exchanger and the second working fluid heat exchanger are connected in series in sequence.

[0017] In one embodiment, at least one working fluid heat exchanger includes a third working fluid heat exchanger. The second medium pipeline of the second working fluid heat exchanger connects the second turbine and the compressor;

[0018] The low-temperature heat storage module includes an atmospheric pressure heat storage tank. The first heat supply circuit includes a first sub-heat supply circuit. The first sub-heat supply circuit connects the first medium pipeline of the third working fluid heat exchanger and the atmospheric pressure heat storage tank.

[0019] In one embodiment, the heat pump system further includes a fourth working fluid heat exchanger. The first medium pipeline of the fourth working fluid heat exchanger is connected to the outlet of the first turbine and the first medium pipeline of the second heat exchange system. The second medium pipeline of the fourth working fluid heat exchanger communicates with the outlet of the second medium pipeline of at least one of the working fluid heat exchangers and the inlet of the compressor.

[0020] In one embodiment, the steam generation system further includes a fourth heat exchange system and a second steam pipe. The second medium pipeline of the fourth heat exchange system communicates with the steam drum and the second steam pipe. The first medium pipeline of the fourth heat exchange system is connected to the second heat delivery loop.

[0021] In one embodiment, the steam generation system includes a third steam pipe and a steam three-way valve. The three interfaces of the steam three-way valve communicate with the first steam pipe, the second steam pipe, and the third steam pipe respectively.

[0022] In one embodiment, the steam generation system further includes a water supply assembly and a steam preheating pipeline. The steam preheating pipeline is communicated with the steam drum. The steam generation system further includes a preheating heat exchanger. The second medium pipeline of the preheating heat exchanger communicates with the water supply assembly and the steam drum. The first medium pipeline of the preheating heat exchanger is communicated with the steam preheating pipeline.

[0023] In the technical solution of the present invention, by providing a waste heat exchange system, the waste heat source can be used as a heat source to heat the heat storage medium in the first heating loop through heat exchange, and the heated heat storage medium in the first heating loop is sent into the low-temperature heat storage module for storage. When the heat pump system operates, the working fluid expands in the first heat exchange system. Through the first heat delivery loop, the working fluid in the first heat exchange system can be heated through heat exchange, and then the heat-absorbed working fluid is sent into the compressor. The working fluid can be pressurized and heated in the compressor, and then the pressurized and heated working fluid is sent into the second heat exchange system. The working fluid can heat the heat storage medium in the second heating loop, and the heated heat storage medium in the second heating loop is sent into the high-temperature heat storage module for storage. When steam needs to be generated, the heat storage medium stored in the high-temperature heat storage module can be sent into the third heat exchange system, and the water in the steam drum can be heated through heat exchange, so that the steam in the steam drum is discharged through the first steam pipe; overall, the recovery and utilization of waste heat are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 Structural schematic diagram of an embodiment of the industrial waste heat supply steam device provided by the present invention;

[0026] Figure 2 For Figure 1 Structural schematic diagram of the low-temperature heat storage system in

[0027] Figure 3 For Figure 1 Structural schematic diagram of the heat pump system in

[0028] Figure 4 For Figure 1 Structural schematic diagram of the high-temperature heat storage system in

[0029] Figure 5 For Figure 1 Structural schematic diagram of the steam generation system in

[0030] Explanation of the reference numerals in the drawings:

[0031] 1. Waste heat heat exchange system; 11. Low-temperature waste heat heat exchanger; 111. First waste heat valve; 112. Second waste heat valve; 113. First bypass valve; 12. High-temperature waste heat heat exchanger; 121. Third waste heat valve; 122. Fourth waste heat valve; 123. Second bypass valve;

[0032] 2. Low-temperature heat storage system; 21. Low-temperature heat storage module; 211. Atmospheric pressure heat storage tank; 212. Pressurized heat storage tank; 21a. High-temperature area; 21b. Low-temperature area; 22. First heating circuit; 221. First sub-heating circuit; 222. Second sub-heating circuit; 223. First water pump; 224. Second water pump; 23. First heat supply circuit; 231. First sub-heat supply circuit; 232. First sub-heat supply circuit; 233. Third water pump; 234. Fourth water pump;

[0033] 3. Heat pump system; 31. First heat exchange system; 311. First turbine; 312. Second turbine; 313. First working fluid heat exchanger; 314. Second working fluid heat exchanger; 315. Third working fluid heat exchanger; 32. Compressor; 33. Second heat exchange system; 331. First working fluid valve; 332. Second working fluid valve; 333. Working fluid bypass valve; 334. First molten salt valve; 335. Second molten salt valve; 34. Motor; 35. Fourth working fluid heat exchanger; 36. Working fluid storage tank;

[0034] 4. High-temperature heat storage system; 41. High-temperature heat storage module; 411. Hot salt tank; 412. Cold salt tank; 42. Second heating circuit; 421. Third molten salt valve; 422. Molten salt three-way valve; 43. Second heat supply circuit; 431. Fourth molten salt valve; 432. One-way valve; 44. First molten salt pump; 45. Second molten salt pump; 46. Molten salt bypass valve;

[0035] 5. Steam generation system; 51. Third heat exchange system; 52. Steam drum; 53. First steam pipe; 54. Fourth heat exchange system; 55. Second steam pipe; 56. Third steam pipe; 57. Steam three-way valve; 58. Steam storage system; 581. Steam accumulator; 582. Control valve; 583. Steam-water separator; 59. Preheating heat exchanger; 5a. Water supply component; 5a1. Deaerator; 5a2. Water supply pump; 5b. Steam preheating pipeline; 5b1. First steam valve; 5b2. Second steam valve; 5c. Heating pipeline; 5c1. Circulation pump; 5c2. Electric heater;

[0036] 6. Waste heat heat source; 61. Low-temperature waste heat heat source; 62. High-temperature waste heat heat source;

[0037] 7. Return water pipeline; 71. Self-supplied condensate return water; 72. Iron removal part;

[0038] 8. Demineralized water pipeline; 81. Demineralized water; 82. Demineralized water heat exchanger.

[0039] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if the embodiments of the present invention involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In industrial production, such as in high-energy-consuming industries like steel, cement, and aluminum smelting during the industrial production process, a large amount of low-grade waste heat is generated. Especially in the steel industry, during the production process, there are waste heat resources such as raw material sintering flue gas, pelletizing flue gas, rolling heating furnace flue gas, blast furnace hot blast stove flue gas, lime kiln flue gas, blast furnace slag water, and waste gas cooling water. The temperature is mostly between 50°C and 300°C. The total sum of the above waste heat resources accounts for about 33% of the total energy consumption in steel production. Among them, various types of low-grade waste heat existing in steel enterprises include flue gas at 120 - 300°C, such as the third and fourth sections of sintering machine flue gas, rolling heating furnace flue gas, blast furnace hot blast stove flue gas, lime kiln flue gas, pelletizing flue gas, or hot water at 50 - 90°C, such as blast furnace slag water, waste gas primary cooler cooling water, etc. Often due to reasons such as low waste heat grade, dispersed heat sources, instability, and pollution, it is difficult to effectively recover and utilize the waste heat. Currently, these industries have been included in China's carbon emission trading market, and it has become an urgent task to improve the utilization rate of medium-grade waste heat.

[0044] The present invention proposes an industrial waste heat steam supply device.

[0045] Please refer to Figure 1 and Figure 2, in an embodiment of the present invention, the industrial waste heat steam supply device includes a waste heat exchange system 1, a low-temperature heat storage system 2, a heat pump system 3, a high-temperature heat storage system 4, and a steam generation system 5. The first medium pipeline of the waste heat exchange system 1 is used to connect to a waste heat heat source 6. The low-temperature heat storage system 2 includes a connected low-temperature heat storage module 21, a first heating circuit 22, and a first heat supply circuit 23. The first heating circuit 22 is connected to the second medium pipeline of the waste heat exchange system 1. The heat pump system 3 includes a first heat exchange system 31, a compressor 32, and a second heat exchange system 33. The second medium pipeline of the first heat exchange system 31, the compressor 32, and the first medium pipeline of the second heat exchange system 33 are connected end to end in sequence. The first heat supply circuit 23 is connected to the first medium pipeline of the first heat exchange system 31. The working fluid in the heat pump system 3 can expand and absorb heat in the first heat exchange system 31. The compressor 32 can pressurize the working fluid and introduce it into the first medium pipeline of the second heat exchange system 33. The high-temperature heat storage system 4 includes a connected high-temperature heat storage module 41, a second heating circuit 42, and a second heat supply circuit 43. The second heating circuit 42 is connected to the second medium pipeline of the second heat exchange system 33. The steam generation system 5 includes a third heat exchange system 51, a steam drum 52, and a first steam pipe 53. The steam drum 52 is connected to the second medium pipeline of the third heat exchange system 51. The second heat supply circuit 43 is connected to the first medium pipeline of the second heat exchange system 33. The first steam pipe 53 is connected to the steam drum 52.

[0046] In the technical solution of the present invention, by setting up the waste heat exchange system 1, the waste heat heat source 6 can be used as a heat source to heat the heat storage medium in the first heating circuit 22 through heat exchange, and the heated heat storage medium in the first heating circuit 22 is sent into the low-temperature heat storage module 21 for storage. When the heat pump system 3 operates, the working fluid expands and cools down in the first heat exchange system 31. Through the first heat supply circuit 23, the working fluid in the first heat exchange system 31 can be heated through heat exchange, and then the heat-absorbed working fluid is sent into the compressor 32. The working fluid can be pressurized and heated up in the compressor 32 and be in a high-temperature and high-pressure state. Then, after the pressurized and heated working fluid is sent into the second heat exchange system 33, the working fluid can heat the heat storage medium in the second heating circuit 42, and the heated heat storage medium in the second heating circuit 42 is sent into the high-temperature heat storage module 41 for storage. When steam needs to be generated, the heat storage medium stored in the high-temperature heat storage module 41 can be sent into the third heat exchange system 51, and the water in the steam drum 52 can be heated through heat exchange, so that the steam in the steam drum 52 is discharged through the first steam pipe 53; overall, the recovery and utilization of waste heat are realized.

[0047] In this application, the low-temperature heat storage system 2 contains a first heat storage medium, which is water. The heat storage medium in the low-temperature heat storage system 2 can also be other heat storage media that meet the requirements; the high-temperature heat storage system 4 contains a second heat storage medium, which is molten salt, specifically ternary salt. The working temperature of the molten salt needs to meet 145°C - 450°C, that is, the molten salt needs to maintain good fluidity at the working temperature. The specific composition of the molten salt is not limited here. The working medium in the heat pump system 3 can be carbon dioxide.

[0048] Both the heat exchanger and the heat exchange system have a first medium pipeline and a second medium pipeline. The temperature of the medium in the first medium pipeline is always higher than that in the second medium pipeline. The medium in the first medium pipeline can transfer heat to the medium in the second medium pipeline through heat conduction, so that the medium in the first medium pipeline exchanges heat and heats the medium in the second medium pipeline through heat conduction.

[0049] Please refer to Figure 1 and Figure 2 , in this embodiment, the temperature difference between different waste heat sources 6 is relatively large. In order to utilize different waste heat sources 6, the waste heat exchange system 1 includes a low-temperature waste heat exchanger 11 and a high-temperature waste heat exchanger 12. The first medium pipeline of the low-temperature waste heat exchanger 11 is used to connect to the low-temperature waste heat source 616, and the first medium pipeline of the high-temperature waste heat exchanger 12 is used to connect to the high-temperature waste heat source 626. The low-temperature heat storage module 21 includes an atmospheric pressure heat storage tank 211 and a pressurized heat storage tank 212; the first heating circuit 22 includes a first sub-heating circuit 221 and a second sub-heating circuit 222. The first sub-heating circuit 221 communicates with the second medium pipeline of the low-temperature waste heat exchanger 11 and the atmospheric pressure heat storage tank 211, and the second sub-heating circuit 222 communicates with the second medium pipeline of the high-temperature waste heat exchanger 12 and the pressurized heat storage tank 212.

[0050] By separately setting the atmospheric pressure heat storage tank 211 and the pressurized heat storage tank 212, atmospheric pressure heat storage and pressurized heat storage can be respectively achieved. The low-temperature waste heat source 616 can heat the first heat storage medium in the first sub-heating circuit 221 in a certain way, and send the heated first heat storage medium into the atmospheric pressure heat storage tank 211. The high-temperature waste heat source 626 can heat the first heat storage medium in the first sub-heating circuit 221 in a certain way, and send the heated first heat storage medium into the pressurized heat storage tank 212; the low-temperature waste heat source 616 and the high-temperature waste heat source 626 are respectively introduced into the low-temperature waste heat exchanger 11 and the high-temperature waste heat exchanger 12, realizing the full utilization of the waste heat source 6.

[0051] Both the atmospheric pressure heat storage tank 211 and the pressurized heat storage tank 212 are atmospheric pressure inclined temperature layer integrated water storage tanks, such that a high temperature zone 21a is formed on the upper side inside the atmospheric pressure heat storage tank 211 and the pressurized heat storage tank 212, and a low temperature zone 21b is formed on the lower side inside the atmospheric pressure heat storage tank 211 and the pressurized heat storage tank 212; the temperature of the high temperature zone 21a of the atmospheric pressure heat storage tank 211 is not higher than 70 °C. Specifically, the temperature of the high temperature zone 21a of the atmospheric pressure heat storage tank 211 is 70 °C, and the temperature of the low temperature zone 21b of the atmospheric pressure heat storage tank 211 is not lower than 25 °C; the pressure inside the pressurized heat storage tank 212 is higher than the atmospheric pressure, which can make the maximum temperature of the water inside the pressurized heat storage tank 212 higher than 100 °C. Specifically, the temperature of the high temperature zone 21a of the pressurized heat storage tank 212 is not higher than 130 °C, the temperature of the high temperature zone 21a of the pressurized heat storage tank 212 is 130 °C, and the temperature of the low temperature zone 21b of the pressurized heat storage tank 212 is not lower than 40 °C.

[0052] Both ends of the first sub-heating circuit 221 are respectively connected to the low temperature zone 21b and the high temperature zone 21a of the atmospheric pressure heat storage tank 211. A first water pump 223 is provided on the first sub-heating circuit 221. Starting the first water pump 223 can send the water in the low temperature zone 21b inside the atmospheric pressure heat storage tank 211 into the second medium pipeline of the low temperature waste heat exchanger 11 through the first sub-heating circuit 221, and then send the heated water into the high temperature zone 21a inside the atmospheric pressure heat storage tank 211. By setting the flow rate of the first water pump 223, the water temperature at the outlet of the second medium pipeline of the low temperature waste heat exchanger 11 is not lower than 70 °C, which can make the water temperature in the high temperature zone 21a inside the atmospheric pressure heat storage tank 211 be 70 °C, thereby converting the low temperature waste heat heat source 616 into 70 °C hot water and storing it.

[0053] Both ends of the second sub-heating circuit 222 are respectively connected to the low temperature zone 21b and the high temperature zone 21a of the pressurized heat storage tank 212. A second water pump 224 is provided on the second sub-heating circuit 222. Starting the second water pump 224 can send the water in the low temperature zone 21b inside the pressurized heat storage tank 212 into the second medium pipeline of the high temperature waste heat exchanger 12 through the first sub-heating circuit 221, and then send the heated water into the high temperature zone 21a inside the pressurized heat storage tank 212. By setting the flow rate of the first water pump 223, the water temperature at the outlet of the second medium pipeline of the high temperature waste heat exchanger 12 is not lower than 130 °C, which can make the water temperature in the high temperature zone 21a inside the pressurized heat storage tank 212 be 130 °C, thereby converting the high temperature waste heat heat source 626 into 130 °C hot water and storing it.

[0054] Please refer to Figure 1 and Figure 2, a first waste heat valve 111 is connected to the inlet of the first medium pipeline of the low-temperature waste heat exchanger 11, and a second waste heat valve 112 is connected to the outlet of the first medium pipeline of the low-temperature waste heat exchanger 11. By closing the first waste heat valve 111, the low-temperature waste heat source 616 can be stopped from being introduced into the low-temperature waste heat exchanger 11. By closing the second waste heat valve 112, the low-temperature waste heat discharged from the first medium pipeline of the low-temperature waste heat exchanger 11 can be prevented from flowing back into the low-temperature waste heat exchanger 11. In addition, a first bypass valve 113 is connected between the inlet of the first waste heat valve 111 and the outlet of the second waste heat valve 112. After opening the first bypass valve 113 and closing the first waste heat valve 111 and the second waste heat valve 112, it is convenient to perform on-line maintenance on the low-temperature waste heat exchanger 11.

[0055] , a third waste heat valve 121 is connected to the inlet of the first medium pipeline of the high-temperature waste heat exchanger 12, and a fourth waste heat valve 122 is connected to the outlet of the first medium pipeline of the high-temperature waste heat exchanger 12. By closing the third waste heat valve 121, the high-temperature waste heat source 626 can be stopped from being introduced into the high-temperature waste heat exchanger 12. By closing the fourth waste heat valve 122, the high-temperature waste heat discharged from the first medium pipeline of the high-temperature waste heat exchanger 12 can be prevented from flowing back into the high-temperature waste heat exchanger 12. In addition, a second bypass valve 123 is connected between the inlet of the third waste heat valve 121 and the outlet of the fourth waste heat valve 122. After opening the second bypass valve 123 and closing the third waste heat valve 121 and the fourth waste heat valve 122, it is convenient to perform maintenance on the high-temperature waste heat exchanger 12.

[0056] The low-temperature waste heat source 616 includes a waste heat source 6 with a temperature not higher than 90 °C, including hot water and hot smoke. The high-temperature waste heat source 626 includes a waste heat source 6 with a temperature higher than 90 °C, including hot water and hot smoke.

[0057] The low-temperature waste heat exchanger 11 can be a single heat exchanger or multiple parallel heat exchangers. The corresponding low-temperature waste heat source 616 can be introduced into the low-temperature waste heat exchanger 11 as needed, so that in the low-temperature waste heat exchanger 11, the low-temperature waste heat source 616 and the first heat storage medium (water) conduct heat, and the temperature of the first heat storage medium is increased. Then, the heated first heat storage medium is introduced into the low-temperature heat storage tank for storage.

[0058] The low-temperature waste heat exchanger 11 can be multiple series-connected heat exchangers. The temperatures of multiple low-temperature waste heat sources 616 can be sorted from low to high, and multiple low-temperature waste heat sources 616 and multiple heat exchangers are corresponding one by one, and are introduced into the corresponding heat exchangers in turn, so that multiple low-temperature waste heat sources 616 with temperatures sorted from low to high heat water in turn, which can improve the utilization efficiency of the low-temperature waste heat source 616.

[0059] The high-temperature waste heat exchanger 12 can be a single heat exchanger or multiple parallel heat exchangers. The corresponding high-temperature waste heat heat source 626 can be introduced into the high-temperature waste heat exchanger 12 as needed, so that in the high-temperature waste heat exchanger 12, the high-temperature waste heat heat source 626 and the first heat storage medium (water) conduct heat, and the temperature of the first heat storage medium is increased. Then, the heated first heat storage medium is introduced into the high-temperature heat storage tank for storage.

[0060] The high-temperature waste heat exchanger 12 can be multiple series-connected heat exchangers. The temperatures of multiple high-temperature waste heat heat sources 626 can be sorted from low to high, and multiple high-temperature waste heat heat sources 626 and multiple corresponding heat exchangers are sequentially introduced into the corresponding heat exchangers, so that multiple high-temperature waste heat heat sources 626 sorted from low to high heat water in turn, which can improve the utilization efficiency of the high-temperature waste heat heat source 626.

[0061] In order to further improve the utilization efficiency of the low-temperature waste heat heat source 616, the outlet of the first medium pipeline of the high-temperature waste heat exchanger 12 can be connected to the inlet of the first medium pipeline of the low-temperature waste heat exchanger 11, so as to improve the utilization of the high-temperature waste heat heat source 626 discharged from the outlet of the first medium pipeline of the high-temperature waste heat exchanger 12.

[0062] Please refer to Figure 1 and Figure 3 , the first heat exchange system 31 includes a first turbine 311 and at least one working fluid heat exchanger. The first turbine 311 is drivingly connected to the compressor 32. The first medium pipeline of at least one working fluid heat exchanger is connected to the first heat supply circuit 23, and the second medium pipeline of at least one working fluid heat exchanger connects the first turbine 311 and the compressor 32. After the working fluid enters the first turbine 311, the working fluid expands and cools at the same time. The first turbine 311 can drive the compressor 32 to provide power for the compressor 32. Through at least one working fluid heat exchanger, the working fluid can be heated to increase the temperature of the working fluid.

[0063] The first heat exchange system 31 further includes a second turbine 312. At least one working fluid heat exchanger includes a first working fluid heat exchanger 313. The second medium pipeline of the first working fluid heat exchanger 313 connects the first turbine 311 and the second turbine 312. The low-temperature heat storage module 21 includes a pressurized heat storage tank 212. The first heat supply circuit 23 includes a second sub-heat supply circuit, and the second sub-heat supply circuit connects the first medium pipeline of the first working fluid heat exchanger 313 and the pressurized heat storage tank 212.

[0064] By setting the first turbine 311 and the second turbine 312, the staged expansion of the working fluid can be achieved to increase the temperature of the working fluid in the first turbine 311, ensuring the heating effect of the first working fluid heat exchanger 313 on the working fluid. After the working fluid enters the second turbine 312, it can expand again to make the working fluid flowing out of the second turbine 312 be at low pressure and low temperature. The temperature of the hot water in the pressurized heat storage tank 212 is relatively high. By sending the hot water in the pressurized heat storage tank 212 into the first medium pipeline of the first working fluid heat exchanger 313 through the second sub-heat supply loop, the low-pressure and low-temperature working fluid can be effectively heated to increase the temperature of the working fluid before entering the second turbine 312, so as to ensure the expansion efficiency of the working fluid in the second turbine 312.

[0065] Please refer to Figure 1 and Figure 3 , the second turbine 312 is drivingly connected to the compressor 32. When the working fluid expands in the second turbine 312, the second turbine 312 can provide power for the compressor 32. Specifically, the first turbine 311 and the second turbine 312 are both coaxially connected to the compressor 32. The heat pump system 3 further includes a motor 34, the motor 34 is drivingly connected to the compressor 32, and the first turbine 311 and the second turbine 312 can reduce the power consumption of the motor 34.

[0066] The first heat exchange system 31 further includes a second turbine 312, and at least one of the working fluid heat exchangers includes a second working fluid heat exchanger 314; the second medium pipeline of the second working fluid heat exchanger 314 is connected to the second turbine 312 and the compressor 32, and the first medium pipelines of the first working fluid heat exchanger 313 and the second working fluid heat exchanger 314 are connected in series in sequence. By heating the working fluid flowing out of the second turbine 312 through the second working fluid heat exchanger 314, the temperature of the working fluid before entering the compressor 32 can be increased, and the highest temperature after the working fluid is compressed can be increased.

[0067] Please refer to Figure 1 , Figure 2 and Figure 3 , both ends of the second sub-heat supply loop are respectively connected to the high-temperature area 21a and the low-temperature area 21b of the pressurized heat storage tank 212, and a fourth water pump 234 is arranged on the first heat supply loop 23. Starting the fourth water pump 234 can send the water in the high-temperature area 21a into the first medium pipeline in the second turbine 312, and send the drained water in the first medium pipeline in the second turbine 312 into the first medium pipeline of the second working fluid heat exchanger 314, and then send the water discharged from the first medium pipeline into the low-temperature area 21b of the pressurized heat storage tank 212 through the second sub-heat supply loop.

[0068] At least one of the working fluid heat exchangers includes a third working fluid heat exchanger 315. The second medium pipeline of the second working fluid heat exchanger 314 is connected to the second turbine 312 and the compressor 32. The low-temperature heat storage module 21 includes an atmospheric pressure heat storage tank 211. The first heat supply loop 23 includes a first sub-heat supply loop 232231, and the first sub-heat supply loop 232231 communicates with the first medium pipeline of the third working fluid heat exchanger 315 and the atmospheric pressure heat storage tank 211. By heating the working fluid flowing out of the second turbine 312 through the second working fluid heat exchanger 314, the temperature of the working fluid before entering the compressor 32 can be increased, and the maximum temperature after the working fluid is compressed can be increased.

[0069] Both ends of the first sub-heat supply loop 232231 are respectively connected to the high-temperature area 21a and the low-temperature area 21b of the atmospheric pressure heat storage tank 211, and a third water pump 233 is arranged on the first sub-heat supply loop 232231. Starting the third water pump 233 can send the hot water in the high-temperature area 21a into the first medium pipeline of the third working fluid heat exchanger 315 to realize heat exchange heating of the working fluid, and then send the water discharged from the first medium pipeline of the third working fluid heat exchanger 315 into the low-temperature area 21b of the atmospheric pressure heat storage tank 211.

[0070] The heat pump system 3 further includes a fourth working fluid heat exchanger 35. The first medium pipeline of the fourth working fluid heat exchanger 35 is connected to the outlet of the first medium pipeline of the first turbine 311 and the second heat exchange system 33. The second medium pipeline of the fourth working fluid heat exchanger 35 communicates with the outlet of the second medium pipeline of at least one of the working fluid heat exchangers and the inlet of the compressor 32. After the high-pressure working fluid passes through the second heat exchange system 33, the temperature of the high-pressure working fluid is relatively high. Through the fourth working fluid heat exchanger 35, the high-pressure working fluid can be used to heat the low-pressure working fluid to increase the temperature of the working fluid when it enters the compressor 32.

[0071] On the connecting pipe between the outlet of the second turbine 312 and the inlet of the compressor 32, the third working fluid heat exchanger 315, the second working fluid heat exchanger 314, and the fourth working fluid heat exchanger 35 are arranged in sequence, so that the working fluid discharged from the second turbine 312 can be heated successively through the third working fluid heat exchanger 315, the second working fluid heat exchanger 314, and the fourth working fluid heat exchanger 35 and then sent into the compressor 32.

[0072] By setting the first turbine 311, the pressure after the expansion of the working fluid in the first turbine 311 can be controlled to increase the minimum temperature of the working fluid in the first turbine 311, and the water temperature at the outlet of the first medium pipeline of the first working fluid heat exchanger 313 can be made higher than the highest water temperature in the atmospheric pressure heat storage tank 211.

[0073] A working medium storage tank 36 is provided on the connecting pipe between the outlet of the second medium pipeline of the fourth working medium heat exchanger 35 and the inlet of the compressor 32. Through the working medium storage tank 36, the working medium can be stored, facilitating the taking and placing of the working medium as needed.

[0074] The inlet of the first medium pipeline of the second heat exchange system 33 is connected with a first working medium valve 331, and the outlet of the first medium pipeline of the second heat exchange system 33 is connected with a second working medium valve 332. By controlling the closing of the first working medium valve 331, it is possible to prevent the working medium pressurized by the compressor 32 from entering the first medium pipeline of the second heat exchange system 33; at this time, closing the second working medium valve 332 can prevent the working medium from flowing back into the first medium pipeline of the second heat exchange system 33. A working medium bypass valve 333 is connected between the inlet of the first working medium valve 331 and the outlet of the second working medium valve 332, which can be opened when the first working medium valve 331 and the second working medium valve 332 are closed, facilitating the maintenance of the third heat exchange system 51.

[0075] The second heat exchange system 33 can be a single heat exchanger or multiple heat exchangers connected in series or in parallel.

[0076] Through the waste heat exchange system 1, the heat in the waste heat heat source 6 can be stored in the low-temperature heat storage system 2 to realize the temporary storage of the waste heat; by operating the heat pump system 3 during the off-peak power period of the power grid, the heat in the low-temperature heat storage system 2 can be stored in the high-temperature heat storage system 4, which can reduce the electricity cost during the operation of the heat pump system 3; in order to store as much heat in the low-temperature heat storage system 2 as possible in the off-peak power period of the power grid into the high-temperature heat storage system 4, multiple heat pump systems 3 are arranged in parallel. The cooperation of multiple heat pump systems 3 can improve the efficiency of the heat pump. In this application, two heat pump systems 3 are provided.

[0077] The high-temperature heat storage module 41 includes a hot salt tank 411 and a cold salt tank 412. The temperature of the molten salt in the hot salt tank 411 is not lower than 380 °C, and the temperature of the molten salt in the cold salt tank 412 is not lower than 180 °C, which can ensure the fluidity of the molten salt in the hot salt tank 411 and the cold salt tank 412.

[0078] Please refer to Figure 1 、 Figure 3 and Figure 4 , a first molten salt pump 44 is arranged in the cold salt tank 412. The second heating circuit 42 is connected to the outlet of the first molten salt pump 44, and the other end extends into the hot salt tank 411. Starting the first molten salt pump 44 can send the molten salt in the cold salt tank 412 into the second medium pipeline of the second heat exchange system 33 through the second heating circuit 42 for heating, and send the heated molten salt into the hot salt tank 411 for storage.

[0079] The second medium pipeline of the second heat exchange system 33 is connected in series to the second heating circuit 42. The two ends of the second medium pipeline of the second heat exchange system 33 are respectively provided with a first molten salt valve 334 and a second molten salt valve 335. By closing the first molten salt valve 334 and the second molten salt valve 335, it is possible to prevent the molten salt in the second heating circuit 42 from entering the second medium pipeline of the second heat exchange system 33. One end of the second heating circuit 42 close to the first molten salt pump 44 is provided with a third molten salt valve 421. The third molten salt valve 421 is located outside the cold salt tank 412. By controlling the opening and closing of the third molten salt valve 421, the opening and closing of the second heating circuit 42 can be controlled.

[0080] In the embodiment of the present application, the working medium temperature at the inlet of the first medium pipeline of the second heat exchange system 33 is 390 °C, and the working medium temperature at the outlet of the first medium pipeline of the second heat exchange system 33 is 190 °C.

[0081] A second molten salt pump 45 is arranged in the hot salt tank 411. One end of the second heat delivery loop 43 is connected to the outlet of the second molten salt pump 45, and the other end extends into the cold salt tank 412. Starting the second molten salt pump 45 can send the molten salt in the hot salt tank 411 into the cold salt tank 412 through the second heat delivery loop 43.

[0082] On the second heat delivery loop 43, a fourth molten salt valve 431, a one-way valve 432, a fourth heat exchange system 54, and a third heat exchange system 51 are successively arranged at intervals along the flow direction of the molten salt.

[0083] Please refer to Figure 1 、 Figure 3 and Figure 4 , one end of the second heating circuit 42 close to the hot salt tank 411 is provided with a molten salt three-way valve 422. The molten salt three-way valve 422 is connected in series to the second heating circuit 42, and another interface of the molten salt three-way valve 422 is connected between the outlet of the one-way valve 432 and the first medium pipeline of the fourth heat exchange system 54. By controlling the opening degree of the molten salt three-way valve 422, the molten salt heated by the third heat exchange system 51 can be directly introduced into the second heat delivery loop 43. By arranging the one-way valve 432, it is possible to prevent the molten salt in the third heat delivery loop from flowing back into the hot salt tank 411.

[0084] The steam generation system 5 further includes a fourth heat exchange system 54 and a second steam pipe 55. The second medium pipeline of the fourth heat exchange system 54 communicates with the steam drum 52 and the second steam pipe 55, and the first medium pipeline of the fourth heat exchange system 54 is connected to the second heat delivery loop 43. The molten salt in the second heat delivery loop 43 can heat the steam in the second medium pipeline of the fourth heat exchange system 54 in the fourth heat exchange system 54, so that the second steam pipe 55 supplies superheated steam.

[0085] A molten salt bypass valve 46 is connected in parallel to the first medium pipeline of the fourth heat exchange system 54. By controlling the opening degree of the molten salt bypass valve 46, the flow rate of the molten salt in the first medium pipeline of the fourth heat exchange system 54 can be controlled, thereby realizing the regulation of the temperature of the superheated steam.

[0086] Please refer to Figure 1 、 Figure 4 and Figure 5 The steam generation system 5 includes a third steam pipe 56 and a steam three-way valve 57. The three interfaces of the steam three-way valve 57 are respectively connected to the first steam pipe 53, the second steam pipe 55 and the third steam pipe 56. The steam in the first steam pipe 53 and the second steam pipe 55 can be mixed in the third steam pipe 56 to output superheated steam at an intermediate temperature. By controlling the opening degree of the steam three-way valve 57, the flow rates of the steam fed from the first steam pipe 53 and the second steam pipe 55 into the third steam pipe 56 can be controlled, thereby controlling the temperature of the superheated steam output from the third steam pipe 56.

[0087] A steam storage system 58 is provided in parallel on the first steam pipe 53. The steam storage system 58 includes a steam accumulator 581, a regulating valve 582 and a steam-water separator 583 that are connected in sequence. When the gas demand downstream of the first steam pipe 53 is less than the steam discharge rate of the first steam pipe 53, part of the steam in the first steam pipe 53 can be introduced into the steam accumulator 581 for storage to reduce the steam discharge rate of the first steam pipe 53. When the gas demand downstream of the first steam pipe 53 is greater than the steam discharge rate of the first steam pipe 53, by opening the regulating valve 582, the steam in the steam accumulator 581 can enter the steam-water separator 583 through the regulating valve 582 to separate the steam, and the separated steam is sent into the first steam pipe 53, thereby increasing the steam discharge rate of the first steam pipe 53 in a short time.

[0088] Both the first steam pipe 53 and the second steam pipe 55 are connected to the upper side of the steam drum 52, which can prevent the water in the steam drum 52 from entering the first steam pipe 53 and the second steam pipe 55. In this embodiment, the pressure of the steam discharged from the first steam pipe 53 is 1 MPa, and the discharged steam temperature is 180 °C; the pressure of the steam discharged from the second steam pipe 55 is 1 MPa, and the discharged steam temperature is 350 °C; the pressure of the steam discharged from the third steam pipe 56 is 1 MPa, and the discharged steam temperature is 270 °C.

[0089] Please refer to Figure 1 、 Figure 4 and Figure 5, the steam generation system 5 further includes a water supply assembly 5a and a steam preheating pipeline 5b. The steam preheating pipeline 5b is communicated with the steam drum 52. The steam generation system 5 further includes a preheating heat exchanger 59. The second medium pipeline of the preheating heat exchanger 59 communicates the water supply assembly 5a and the steam drum 52, and the first medium pipeline of the preheating heat exchanger 59 communicates the steam preheating pipeline 5b. The steam in the steam preheating pipeline 5b can preheat the water fed into the steam drum 52 through the preheating heat exchanger 59, improving the water temperature of the water entering the steam drum 52. By controlling the water flow in the second medium pipeline of the preheating heat exchanger 59 and the steam flow in the first medium pipeline of the preheating heat exchanger 59, the temperature of the water entering the steam drum 52 can be adjusted so that the temperature of the water entering the steam drum 52 reaches 170 °C and the pressure reaches 1 MPa.

[0090] The water supply assembly 5a includes a deaerator 5a1. The steam preheating pipeline 5b communicates with the deaerator 5a1. By introducing the steam in the steam preheating tank into the deaerator 5a1, the temperature rise of the water in the deaerator 5a1 can be realized, and the deaeration of the water in the deaerator 5a1 can be achieved.

[0091] One end of the steam preheating pipeline 5b is connected to the upper side of the steam drum 52, reducing the entry of the water in the steam drum 52 into the steam waste heat pipeline. The other end is connected with two steam preheating sub-pipes. One steam preheating sub-pipe is sequentially connected with a first steam valve 5b1 and the preheating heat exchanger 59. The outlet of the first medium pipeline of the preheating heat exchanger 59 is communicated with the deaerator 5a1. After the first steam valve 5b1 is opened, the steam in the steam drum 52 can be sequentially sent into the preheating heat exchanger 59 and the deaerator 5a1. The other steam preheating sub-pipe is connected with the deaerator 5a1 by a second steam valve 5b2. After the second steam valve 5b2 is opened, the steam can be directly sent into the deaerator 5a1.

[0092] The water supply assembly 5a further includes two parallel water supply pumps 5a2. The water inlet of the water supply pump 5a2 is connected to the water outlet of the deaerator 5a1, and the water outlet of the water supply pump 5a2 is connected to the inlet of the second medium pipeline of the preheating heat exchanger 59. Starting the water supply pump 5a2 can send the water in the deaerator 5a1 into the second medium pipeline of the preheating heat exchanger 59.

[0093] Please refer to Figure 1 、 Figure 4 and Figure 5, a deaerator 5a1 is connected with a return water pipeline 7 and a demineralized water 81 pipeline 8. The return water pipeline 7 is connected with a self-supplied heating condensate return 71, and the self-supplied heating condensate return 71 can be the condensate return of the first steam pipe 53, the second steam pipe 55 and the third steam pipe 56. The demineralized water 81 pipeline 8 is connected with demineralized water 81. In order to preheat the water in the demineralized water 81 pipeline 8, a demineralized water 81 heat exchanger is arranged on the demineralized water 81 pipeline 8. The second medium pipeline of the demineralized water 81 heat exchanger is connected in series in the demineralized water 81 pipeline 8, and the first medium pipeline of the demineralized water 81 heat exchanger is communicated with the first medium pipeline of the second heat exchanger. Through the demineralized water 81 heat exchanger, the heating of the demineralized water 81 can be realized. An iron removal part 72 is arranged on the return water pipeline 7, and the iron removal part 72 can filter rust and remove impurities in the return pipeline.

[0094] The steam generation system 5 further includes a heating pipeline 5c. Both ends of the heating pipeline 5c are connected to the lower side of the steam drum 52. A circulation pump 5c1 and an electric heater 5c2 are sequentially connected on the heating pipeline 5c. Before the steam generator is started, by starting the circulation pump 5c1, the water in the steam drum 52 can be heated through the electric heater 5c2, and the heated water is sent into the steam drum 52 to heat the water in the steam drum 52 to 170 °C and increase the pressure to 1 MPa. Two circulation pumps 5c1 are arranged in parallel, which can ensure the pumping and water supply of the heating pipeline 5c when one of the circulation pumps 5c1 is damaged; two heating pipelines 5c are arranged in parallel, which can ensure the heating of the water in the heating pipeline 5c.

[0095] This solution utilizes a low-temperature waste heat exchanger 11 and a high-temperature waste heat exchanger 12 to generate atmospheric pressure hot water and pressurized hot water by heat exchange heating of the heat energy in the waste gas and waste water, and store them in the atmospheric pressure heat storage tank 211 and the pressurized heat storage tank 212 respectively. It can recover the waste heat in the waste gas and waste water throughout the day. The specific heat capacity of water is relatively large, and the requirement for the storage space of water is relatively small, ensuring the continuous recovery of the waste heat in the waste gas and waste water.

[0096] Then, with the help of the heat pump system 3, the heat in the atmospheric pressure hot water and the pressurized hot water is stored in the high-temperature heat storage system 4. The dispersed low-grade industrial waste heat is concentrated and transformed into high-grade waste heat for utilization on a large scale, turning waste into treasure, which has very good value. By starting the heat pump system 3 during the low-valley electricity period, the electricity cost required by the heat pump system 3 can be reduced, and the heat storage cost can be reduced. As the proportion of new energy in the power grid continues to increase and the peak-valley electricity price difference continues to widen, adopting this solution can give full play to the cost advantage of low-valley electricity, and only store heat during the low-valley electricity period to reduce the waste heat recovery cost.

[0097] Through the high-temperature heat storage system 4, it is possible to serve as the heat source of the steam generation system 5 throughout the 24 hours of the day, so that the steam generation system 5 can continuously generate steam, which can meet the contradiction between the mismatch of supply and demand of heat recovery and steam supply, and is beneficial to the stability of system regulation.

[0098] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An industrial waste heat steam supply device, characterized in that It includes a waste heat exchange system, a low-temperature heat storage system, a heat pump system, a high-temperature heat storage system, and a steam generation system; The first medium pipeline of the waste heat exchange system is used to connect to the waste heat heat source; The low-temperature heat storage system includes a connected low-temperature heat storage module, a first heating circuit, and a first heat supply circuit. The first heating circuit is connected to the second medium pipeline of the waste heat exchange system; The heat pump system includes a first heat exchange system, a compressor, and a second heat exchange system. The second medium pipeline of the first heat exchange system, the compressor, and the first medium pipeline of the second heat exchange system are connected end to end in sequence. The first heat supply circuit is connected to the first medium pipeline of the first heat exchange system. The working medium in the heat pump system can expand and absorb heat in the first heat exchange system, and the compressor can pressurize the working medium and introduce it into the first medium pipeline of the second heat exchange system; The high-temperature heat storage system includes a connected high-temperature heat storage module, a second heating circuit, and a second heat supply circuit. The second heating circuit is connected to the second medium pipeline of the second heat exchange system; The steam generation system includes a third heat exchange system, a steam drum, and a first steam pipe. The steam drum is connected to the second medium pipeline of the third heat exchange system. The second heat supply circuit is connected to the first medium pipeline of the second heat exchange system. The first steam pipe is connected to the steam drum; 2. The industrial waste heat steam supply device according to claim 1, wherein The waste heat exchange system includes a low-temperature waste heat exchanger and a high-temperature waste heat exchanger. The first medium pipeline of the low-temperature waste heat exchanger is used to connect to the low-temperature waste heat heat source, and the first medium pipeline of the high-temperature waste heat exchanger is used to connect to the high-temperature waste heat heat source; The low-temperature heat storage module includes an atmospheric pressure heat storage tank and a pressurized heat storage tank; The first heating circuit includes a first sub-heating circuit and a second sub-heating circuit. The first sub-heating circuit connects the second medium pipeline of the low-temperature waste heat exchanger and the atmospheric pressure heat storage tank, and the second sub-heating circuit connects the second medium pipeline of the high-temperature waste heat exchanger and the pressurized heat storage tank; 3. The industrial waste heat steam supply device according to claim 2, characterized in that The first heat exchange system includes a first turbine and at least one working medium heat exchanger. The first turbine is drivingly connected to the compressor. The first medium pipeline of at least one working medium heat exchanger is connected to the first heat supply circuit, and the second medium pipeline of at least one working medium heat exchanger connects the first turbine and the compressor; 4. The industrial waste heat steam supply device according to claim 3, wherein, The first heat exchange system further includes a second turbine. At least one working medium heat exchanger includes a first working medium heat exchanger. The second medium pipeline of the first working medium heat exchanger connects the first turbine and the second turbine; The low-temperature heat storage module includes a pressurized heat storage tank. The first heat supply circuit includes a second sub-heat supply circuit. The second sub-heat supply circuit connects the first medium pipeline of the first working medium heat exchanger and the pressurized heat storage tank; 5. The industrial waste heat steam supply device according to claim 4, wherein The first heat exchange system further includes a second turbine. At least one working medium heat exchanger includes a second working medium heat exchanger. The second medium pipeline of the second working medium heat exchanger connects the second turbine and the compressor. The first medium pipelines of the first working medium heat exchanger and the second working medium heat exchanger are connected in series in sequence; 6. The industrial waste heat steam supply device according to claim 3, characterized in that, At least one of the working fluid heat exchangers includes a third working fluid heat exchanger, and the second medium pipeline of the second working fluid heat exchanger is connected to the second turbine and the compressor; The low-temperature heat storage module includes an atmospheric pressure heat storage tank; the first heat supply loop includes a first sub-heat supply loop, and the first sub-heat supply loop communicates the first medium pipeline of the third working fluid heat exchanger and the atmospheric pressure heat storage tank.

7. The industrial waste heat steam supply device according to claim 3, characterized in that, The heat pump system further includes a fourth working fluid heat exchanger, the first medium pipeline of the fourth working fluid heat exchanger is connected to the outlet of the first medium pipeline of the first turbine and the second heat exchange system, and the second medium pipeline of the fourth working fluid heat exchanger communicates with the outlet of the second medium pipeline of at least one of the working fluid heat exchangers and the inlet of the compressor.

8. The industrial waste heat steam supply device according to claim 1, wherein, The steam generation system further includes a fourth heat exchange system and a second steam pipe, the second medium pipeline of the fourth heat exchange system communicates the steam drum and the second steam pipe, and the first medium pipeline of the fourth heat exchange system is connected to the second heat supply loop.

9. The industrial waste heat steam supply device according to claim 8, characterized in that, The steam generation system includes a third steam pipe and a steam three-way valve, and the three interfaces of the steam three-way valve are respectively communicated with the first steam pipe, the second steam pipe and the third steam pipe.

10. The industrial waste heat steam supply device according to claim 1, characterized in that The steam generation system further includes a water supply assembly and a steam preheating pipeline, the steam preheating pipeline is communicated with the steam drum, the steam generation system further includes a preheating heat exchanger, the second medium pipeline of the preheating heat exchanger communicates the water supply assembly and the steam drum, and the first medium pipeline of the preheating heat exchanger is communicated with the steam preheating pipeline.

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