A heating system for utilizing industrial waste heat from a carbon plant

Abstract

This invention discloses a waste heat utilization heating system for a carbon plant, belonging to the field of industrial waste heat utilization technology. It includes a heat exchange subsystem comprising a plate heat exchanger, a steam absorption heat pump, and a steam-water heat exchanger arranged sequentially. The plate heat exchanger and the steam absorption heat pump are both connected to a water jacket circulating water subsystem. The steam absorption heat pump and the steam-water heat exchanger are both connected to a steam pipe and a condensate supply subsystem. The water jacket circulating water subsystem supplies heat to the plate heat exchanger and / or the steam absorption heat pump, and the steam pipe supplies heat to the steam absorption heat pump and / or the steam-water heat exchanger.

Description

Technical Field

[0001] This invention belongs to the field of industrial waste heat utilization technology, specifically relating to a heating system for utilizing industrial waste heat in a carbon plant. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Gas-fired or coal-fired boiler rooms, relying solely on the combustion of gas or coal for centralized heating, can no longer meet actual energy demands due to limitations in transmission efficiency and environmental pollution. Furthermore, the energy utilization methods of gas-fired and coal-fired boiler rooms are simplistic and inefficient, lacking sufficient resource conservation and civilized practices. Industrial waste heat heating can effectively compensate for the shortcomings of insufficient energy supply to meet demand.

[0004] During carbon production, the cooling water from the discharge tanks releases a large amount of waste heat through cooling towers. Simultaneously, carbon plants typically have their own power generation boilers, generating a certain amount of waste heat from exhaust gases. The industrial waste heat utilization heating system in carbon plants is tailored to local conditions, comprehensively utilizing and complementing industrial waste heat to improve the quality and efficiency of energy supply, achieving energy conservation, emission reduction, and green low-carbon effects. By determining the system operation process according to the principle of "temperature matching and tiered utilization" for different types of industrial waste heat, combined with the local heating model, the system achieves improved energy conversion efficiency and time complementarity.

[0005] Waste heat recovery heating systems are of great significance and far-reaching strategic importance for building a clean, low-carbon, safe, and efficient modern energy system. Many enterprises already utilize industrial waste heat to varying degrees, which can effectively help them save energy, reduce emissions, and create greater benefits. However, most enterprises only recover high-grade waste heat for heating, hot water supply, and process heat replenishment, while the remaining waste heat is directly discharged through cooling. Because some enterprises lack understanding of waste heat recovery technology or are unwilling to invest, a large portion of low-grade heat energy is wasted, while other areas requiring heat still need to be heated by boilers or electric heat pumps. This is especially true in northern regions with high heat demand, where waste heat recovery heating systems are the most energy-efficient and environmentally friendly approach. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a carbon plant waste heat utilization heating system. This system introduces waste heat from carbon plants to provide centralized heating for urban areas, which can replace some of the existing coal-fired boilers in urban areas, thereby saving energy and reducing urban energy consumption.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] In a first aspect, the present invention provides a carbon plant industrial waste heat utilization heating system, including a heat exchange subsystem. The heat exchange subsystem includes a plate heat exchanger, a steam absorption heat pump, and a steam-water heat exchanger arranged sequentially. The plate heat exchanger and the steam absorption heat pump are both connected to a water jacket circulating water subsystem. The steam absorption heat pump and the steam-water heat exchanger are both connected to a steam pipe and a condensate supply subsystem. The water jacket circulating water subsystem supplies heat to the plate heat exchanger and / or the steam absorption heat pump, and the steam pipe supplies heat to the steam absorption heat pump and / or the steam-water heat exchanger.

[0009] As a further technical solution, the plate heat exchanger, the steam absorption heat pump, and the steam-water heat exchanger can all operate independently, or they can be combined in any two or three ways.

[0010] As a further technical solution, the plate heat exchanger is connected to the municipal return water pipe, and a dirt remover and a municipal circulating water pump are installed on the municipal return water pipe; a first electric valve is installed between the plate heat exchanger and the municipal return water pipe, and the plate heat exchanger is also connected to the municipal water supply branch.

[0011] As a further technical solution, the municipal side return water pipe is also connected to the municipal side water supply branch through the municipal side first branch, the municipal side first branch and the plate heat exchanger are connected in parallel, and the municipal side first branch is equipped with a second electric valve.

[0012] As a further technical solution, the municipal water supply branch is also connected to the municipal second branch, the municipal second branch is connected to the steam absorption heat pump, the municipal water supply branch is also connected to the municipal third branch, the municipal third branch is connected in parallel with the steam absorption heat pump, the municipal second branch is connected to the municipal third branch after the steam absorption heat pump outlet, the municipal second branch is equipped with a third electric valve, and the municipal third branch is equipped with a fourth electric valve.

[0013] As a further technical solution, the municipal side third branch is connected to the municipal side fourth branch, the municipal side fourth branch is connected to the steam-water heat exchanger, the municipal side third branch is also connected to the municipal side fifth branch, the municipal side fifth branch and the steam-water heat exchanger are connected in parallel, the municipal side fourth branch is connected to the municipal side fifth branch after passing through the outlet of the steam-water heat exchanger, the municipal side fourth branch is equipped with a fifth electric valve, and the municipal side fifth branch is equipped with a sixth electric valve; the municipal side fifth branch is connected to the municipal side water supply pipe to provide hot water to the municipal side.

[0014] As a further technical solution, the water jacket circulating water subsystem includes a calcining furnace water jacket, with the calcining furnace water jacket inlet connected to the water jacket-side return water pipe and the calcining furnace water jacket outlet connected to the water jacket-side supply water pipe; the calcining furnace water jacket is connected in parallel with a cooling tower, with both ends of the cooling tower connected to the water jacket-side return water pipe and the water jacket-side supply water pipe, respectively; a seventh electric valve is installed on the water jacket-side return water pipe, an eighth electric valve and a water jacket-side cooling circulating water pump are installed between the water jacket-side return water pipe and the cooling tower, a ninth electric valve is installed between the cooling tower and the water jacket-side supply water pipe, and a tenth electric valve is installed on the water jacket-side supply water pipe.

[0015] As a further technical solution, the water jacket side supply pipe is connected to the plate heat exchanger through a first branch, the water jacket side supply pipe is connected to the steam absorption heat pump through a second branch, the plate heat exchanger is connected to the water jacket side return pipe through a third branch, and the steam absorption heat pump is connected to the water jacket side return pipe through a fourth branch; the third branch is equipped with an eleventh electric valve, and the fourth branch is equipped with a twelfth electric valve; the water jacket side supply pipe is equipped with a dirt remover and a water jacket side booster pump, and the water jacket side supply pipe and the water jacket side return pipe are also connected by a direct connection pipe, the direct connection pipe is equipped with a thirteenth electric valve, and the direct connection pipe is connected in parallel with both the plate heat exchanger and the steam absorption heat pump.

[0016] As a further technical solution, the steam-water heat exchanger is connected to the steam pipe via a first steam branch, which is equipped with a fourteenth electric valve. The steam pipe is also connected to the steam absorption heat pump via a second steam branch, which is equipped with a fifteenth electric valve. A sixteenth electric valve is installed on the steam pipe, which is used to transport steam from the plant area to the steam-water heat exchanger and the steam absorption heat pump.

[0017] As a further technical solution, the condensate supply subsystem includes a water tank, a steam-water heat exchanger connected to the water tank via a first condensate pipe, a steam absorption heat pump connected to the water tank via a second condensate pipe, and the water tank connected to the plant's softened water pipeline. The water tank is connected to a water supply pipe, which is connected to the water jacket side supply pipe. The water supply pipe is equipped with a water jacket side water supply pressure regulating pump and a seventeenth electric valve for replenishing water when the water jacket side return water pressure is low.

[0018] The beneficial effects of the present invention are as follows:

[0019] The heating system of the present invention can maximize the utilization of waste heat from industrial plants and better meet the demand for industrial waste heat as a heat source for cities.

[0020] The heating system of this invention realizes three-stage heating: plate heat exchanger, steam absorption heat pump, and steam-water heat exchanger. Each module can operate independently, or they can be connected in series in pairs: plate heat exchanger-absorption heat pump, plate heat exchanger-steam-water heat exchanger, and absorption heat pump-steam-water heat exchanger, making the system more energy-efficient and environmentally friendly.

[0021] The heating system of this invention utilizes waste heat to promote energy production, consumption, and technological revolution, comprehensively promotes energy transformation and upgrading, strives to build a safe, reliable, green, and clean modern energy system, and has significant energy-saving, carbon-saving, environmental protection, and social benefits, making it highly valuable for promotion and application. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the industrial waste heat utilization and heating system of the carbon plant of the present invention;

[0024] Figure 2 This is a schematic diagram of the water jacket circulating water subsystem of the present invention;

[0025] Figure 3 This is a schematic diagram showing the connection and coordination of the plate heat exchanger, steam absorption heat pump, and steam-water heat exchanger of the present invention.

[0026] In the diagram: the spacing or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only.

[0027] The components include: 1. Calcining furnace water jacket; 2. Water jacket side supply pipe; 3. Water jacket side return pipe; 4. Cooling tower; 5. Water jacket side cooling circulating water pump; 6. First branch; 7. Plate heat exchanger; 8. Second branch; 9. Steam absorption heat pump; 10. Third branch; 11. Fourth branch; 12. Steam-water heat exchanger; 13. Sludge separator; 14. Water jacket side pressurized water pump; 15. Municipal side return pipe; 16. Sludge separator; 17. Municipal side circulating water pump; 18. Municipal side supply pipe. 19. Municipal side first branch road, 20. Municipal side second branch road, 21. Municipal side fourth branch road, 22. Steam pipe, 23. Steam first branch road, 24. Steam second branch road, 25. Water tank, 26. Second condensate pipe, 27. Plant area softened water pipe, 28. Water supply pipe, 29. Water jacket side water supply constant pressure pump, 30. Direct connection pipeline, 31. Municipal side third branch road, 32. Municipal side fifth branch road, 33. Municipal side water supply branch road, 34. First condensate pipe;

[0028] FM01 is an electric valve, FM02 is an electric valve, FM03 is an electric valve, FM04 is an electric valve, FM05 is an electric valve, FM06 is an electric valve, FM07 is an electric valve, FM08 is an electric valve, FM09 is an electric valve, FM10 is an electric valve, FM11 is an electric valve, FM12 is an electric valve, FM13 is an electric valve, FM14 is an electric valve, FM15 is an electric valve, FM16 is an electric valve, and FM17 is an electric valve. Detailed Implementation

[0029] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] In a typical embodiment of the present invention, such as Figure 1 As shown, a heating system for utilizing industrial waste heat in a carbon plant is proposed, which includes a water jacket circulating water subsystem, a heat exchange subsystem, and a condensate supply subsystem.

[0031] The water jacket circulating water subsystem includes a calcining furnace water jacket 1, with its inlet connected to the water jacket-side return water pipe 3 and its outlet connected to the water jacket-side supply water pipe 2; a cooling tower 4 is connected in parallel with the calcining furnace water jacket 1, with both ends of the cooling tower 4 connected to the water jacket-side return water pipe 3 and the water jacket-side supply water pipe 2, respectively.

[0032] An electric valve FM01 is installed on the main pipeline of the water jacket side return water pipe 3. An electric valve FM02 and a water jacket side cooling circulating water pump 5 are installed between the water jacket side return water pipe 3 and the cooling tower 4. An electric valve FM03 is installed between the cooling tower 4 and the water jacket side supply water pipe 2. An electric valve FM04 is installed on the main pipeline of the water jacket side supply water pipe 2. The water jacket circulating water subsystem can be started by opening the electric valves FM01 and FM04. The cooling tower can be started by opening the electric valves FM02 and FM03.

[0033] The water jacket circulating water subsystem and the heat exchange subsystem are connected to supply heat to the municipal heating network.

[0034] The heat exchange subsystem includes a plate heat exchanger 7, a steam absorption heat pump 9, and a steam-water heat exchanger 12 arranged in sequence.

[0035] Specifically, the water supply pipe 2 on the water jacket side is connected to the plate heat exchanger 7 through the first branch 6, the water supply pipe 2 on the water jacket side is connected to the steam absorption heat pump 9 through the second branch 8, the plate heat exchanger 7 is connected to the water return pipe 3 on the water jacket side through the third branch 10, and the steam absorption heat pump 9 is connected to the water return pipe 3 on the water jacket side through the fourth branch 11. Thus, a heating cycle is formed between the water jacket circulating water subsystem and the heat exchange subsystem in the water jacket circulating water subsystem, the plate heat exchanger, and the steam absorption heat pump.

[0036] An electric valve FM08 is installed on the third branch 10 connecting the plate heat exchanger 7 and the water jacket side return water pipe 3, and an electric valve FM10 is installed on the fourth branch 11 connecting the steam absorption heat pump 9 and the water jacket side return water pipe 3.

[0037] A dirt remover 13 and a water jacket side booster pump 14 are installed on the water jacket side water supply pipe 2. The dirt remover 13 is used to remove impurities in the water jacket side water supply pipe, and the water jacket side booster pump 14 pressurizes the water supply in the water jacket side water supply pipe.

[0038] The water supply pipe 2 and the water return pipe 3 on the water jacket side are also connected by a direct connection pipe 30. The direct connection pipe 30 is equipped with an electric valve FM09. The direct connection pipe 30 is connected in parallel with the plate heat exchanger and the steam absorption heat pump.

[0039] The plate heat exchanger 7 is connected to the municipal return water pipe 15. A dirt remover 16 and a municipal circulating water pump 17 are installed on the municipal return water pipe 15. The dirt remover 16 is used to remove impurities in the municipal return water pipe, and the municipal circulating water pump 17 pressurizes the water supply in the municipal return water pipe. An electric valve FM07 is installed between the plate heat exchanger 7 and the municipal return water pipe 15.

[0040] The plate heat exchanger 7 is also connected to the municipal water supply branch 33.

[0041] The municipal side return water pipe 15 is also connected to the municipal side water supply branch 33 through the municipal side first branch 19. The municipal side first branch 19 and the plate heat exchanger 7 are connected in parallel. The municipal side first branch 19 is equipped with an electric valve FM06. When the plate heat exchanger is not needed, the electric valve FM07 is closed and the electric valve FM06 is opened.

[0042] The municipal water supply branch 33 is also connected to the municipal second branch 20, which is connected to the steam absorption heat pump 9. The municipal water supply branch 33 is also connected to the municipal third branch 31, which is connected in parallel with the steam absorption heat pump 9. The municipal second branch 20 is connected to the municipal third branch 31 after the outlet of the steam absorption heat pump 9. The municipal second branch 20 is equipped with an electric valve FM11, and the municipal third branch 31 is equipped with an electric valve FM13.

[0043] The third branch road 31 on the municipal side connects to the fourth branch road 21 on the municipal side. The fourth branch road 21 on the municipal side connects to the steam-water heat exchanger 12. The third branch road 31 on the municipal side also connects to the fifth branch road 32 on the municipal side. The fifth branch road 32 on the municipal side and the steam-water heat exchanger 12 are connected in parallel. The fourth branch road 21 on the municipal side connects to the fifth branch road 32 on the municipal side after passing through the outlet of the steam-water heat exchanger 12. An electric valve FM15 is installed on the fourth branch road 21 on the municipal side, and an electric valve FM16 is installed on the fifth branch road 32 on the municipal side.

[0044] The fifth branch road 32 on the municipal side is connected to the municipal water supply pipe 18 to provide hot water to the municipal side.

[0045] The steam-water heat exchanger 12 is connected to the steam pipe 22 via the first steam branch 23. The first steam branch 23 is equipped with an electric valve FM14. The steam pipe 22 is also connected to the steam absorption heat pump 9 via the second steam branch 24. The second steam branch 24 is equipped with an electric valve FM12. An electric valve FM17 is installed on the steam pipe 22. The steam pipe 22 is used to transport steam from the plant area to the steam-water heat exchanger and the steam absorption heat pump 9.

[0046] The steam-water heat exchanger 12 and the steam absorption heat pump 9 are connected to the condensate supply subsystem. Specifically, the steam-water heat exchanger 12 is connected to the water tank 25 through the first condensate pipe 34, the steam absorption heat pump 9 is connected to the water tank 25 through the second condensate pipe 26, and the water tank 25 is connected to the plant's softened water pipeline 27 to replenish the water tank.

[0047] Water tank 25 is connected to water supply pipe 28, which is connected to water supply pipe 2 on the water jacket side. Water supply pipe 28 is equipped with water jacket side water supply constant pressure pump 29 and electric valve FM05, which is used to replenish water when the return water pressure on the water jacket side is low.

[0048] This heating system can operate any set of heat exchangers (including plate heat exchangers, heat pumps, and steam-water heat exchangers) independently, or in combination in pairs. Specifically, during heating operation, it can be controlled by electric valves to operate only the plate heat exchangers, steam absorption heat pumps, or steam-water heat exchangers, or in combinations of plate heat exchangers + steam absorption heat pumps, plate heat exchangers + steam-water heat exchangers, steam absorption heat pumps + steam-water heat exchangers, or plate heat exchangers + steam absorption heat pumps + steam-water heat exchangers, to achieve the desired heating effect. At the beginning and end of the heating season, only the plate heat exchangers can be operated to maximize the absorption of residual heat from the water jacket side. As the outdoor temperature drops, the heat pumps are gradually activated. In extremely cold weather, the steam-water heat exchangers are activated for peak shaving.

[0049] The operation process of this heating system is as follows:

[0050] During the non-heating season, close electric valves FM01 and FM04, open electric valves FM02 and FM03, and turn on the water jacket side cooling circulating water pump 5. The circulating water in the water jacket is heated by the calcining furnace water jacket 1, cooled by the cooling tower 4, and then the production process continues.

[0051] During the heating season, the heat exchange components are activated in stages according to the outdoor temperature to heat the municipal hot water.

[0052] When the outdoor temperature is high, the waste heat on the water jacket side can be used to transfer the waste heat to the municipal water supply through the plate heat exchanger. After the municipal return water flows through the sludge filter 16, it is pressurized by the municipal side circulating water pump 17, and then the electric valve FM07 is opened and the electric valve FM06 is closed before entering the plate heat exchanger 7. At the same time, the water jacket side cooling circulating water pump 5 is closed, the electric valves FM02 and FM03 are closed, and the electric valves FM01 and FM04 are opened. After the water jacket side circulating water flows through the sludge filter 13, it is pressurized by the water jacket side pressurizing water pump 14, and then the electric valve FM08 is opened and the electric valve FM09 is closed before entering the plate heat exchanger 7. After the heat exchange on the water jacket side is completed, it flows back to the water jacket for further heating, thus realizing the primary heat exchange of municipal hot water.

[0053] When the outdoor temperature drops, a plate heat exchanger and a steam absorption heat pump are used to heat the municipal water supply. Based on the above process, electric valve FM10 is opened, and the heat from the water jacket side that has not been absorbed by the plate heat exchanger enters the steam absorption heat pump 9. Electric valves FM11, FM12, and FM16 are opened, and the waste heat steam in the plant area is used as the driving heat source to continue heating the municipal side. The resulting condensate flows into the condensate tank 25 by gravity. During this process, the municipal return water is heated by the plate heat exchanger and then enters the steam absorption heat pump. At this time, electric valve FM13 is closed, and the municipal water supply is connected.

[0054] If the municipal water temperature is still insufficient, a plate heat exchanger, a steam absorption heat pump, and a steam-water heat exchanger are used in combination to supply municipal water. Based on the above process, electric valves FM12, FM14, and FM15 are opened, and electric valve FM16 is closed. Steam enters the steam absorption heat pump and the steam-water heat exchanger respectively, and the municipal hot water continues to enter the steam-water heat exchanger through the steam absorption heat pump to continue heating the municipal hot water. At this time, electric valve FM16 is closed, and the municipal water supply is connected.

[0055] When the return water pressure on the water jacket side is low, start the water jacket side water replenishment and pressure regulating pump 29 and open the electric valve FM05.

[0056] When the system operates the steam absorption heat pump 9 and the steam-water heat exchanger 12 separately, the corresponding electric valves FM12 and FM14 need to be opened separately to start steam heating.

[0057] When the municipal return water flows solely through plate heat exchanger 7, steam absorption heat pump 9, and steam-water heat exchanger 12, corresponding electric valves FM07, FM10, and FM15 are opened, and electric valves FM06, FM09, FM13, and FM16 are closed, enabling single-module heating. The municipal return water can be supplied in series with two modules: a plate heat exchanger + steam absorption heat pump, a plate heat exchanger + steam-water heat exchanger, or a steam absorption heat pump + steam-water heat exchanger, with corresponding valves opened and closed accordingly.

[0058] The municipal side of the heating system is designed to operate at 45 / 95℃, and the system’s quantity and quality can be adjusted by circulating water pumps and heat exchange equipment.

[0059] This heating system can operate independently or in series. At the beginning and end of the heating season, only the plate heat exchanger can be operated. At this time, electric valves FM10, FM11, FM12, FM14, and FM15 are closed, and the steam absorption heat pump and steam-water heat exchanger are also closed to realize the direct heating system for industrial waste heat and minimize operating costs. When the outdoor temperature drops, the steam absorption heat pump and steam-water heat exchanger are gradually started to realize the cascade utilization of industrial waste heat and maximize the utilization of waste heat in the plant area.

[0060] Carbon production generates high-temperature flue gas, which is recovered and utilized through a waste heat boiler. Industrial waste heat primarily comes in the form of equipment cooling water (water jacket) and steam. This system utilizes the waste heat from the carbon plant to provide centralized heating for the town, replacing some of the existing coal-fired boilers in the urban area. This is an effective measure to save energy, reduce urban energy consumption, improve the urban environment, and raise people's living standards.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A heating system for utilizing industrial waste heat in a carbon plant, characterized in that, The system includes a heat exchange subsystem comprising a plate heat exchanger, a steam absorption heat pump, and a steam-water heat exchanger arranged sequentially. The plate heat exchanger and the steam absorption heat pump are both connected to a water jacket circulating water subsystem. The steam absorption heat pump and the steam-water heat exchanger are both connected to a steam pipe and a condensate supply subsystem. The water jacket circulating water subsystem supplies heat to the plate heat exchanger and / or the steam absorption heat pump, and the steam pipe supplies heat to the steam absorption heat pump and / or the steam-water heat exchanger. The water jacket circulating water subsystem includes a calcining furnace water jacket, with the calcining furnace water jacket inlet connected to the water jacket-side return water pipe and the calcining furnace water jacket outlet connected to the water jacket-side supply water pipe. The calcining furnace water jacket is connected in parallel with a cooling tower, with both ends of the cooling tower connected to the water jacket-side return water pipe and the water jacket-side supply water pipe, respectively. A seventh electric valve is installed on the water jacket-side return water pipe, an eighth electric valve and a water jacket-side cooling circulating water pump are installed between the water jacket-side return water pipe and the cooling tower, a ninth electric valve is installed between the cooling tower and the water jacket-side supply water pipe, and a tenth electric valve is installed on the water jacket-side supply water pipe. The water jacket side supply pipe is connected to the plate heat exchanger via a first branch, and to the steam absorption heat pump via a second branch. The plate heat exchanger is connected to the water jacket side return pipe via a third branch, and the steam absorption heat pump is connected to the water jacket side return pipe via a fourth branch. The third branch is equipped with an eleventh electric valve, and the fourth branch is equipped with a twelfth electric valve. The water jacket side supply pipe is equipped with a dirt separator and a water jacket side booster pump. The water jacket side supply pipe and the water jacket side return pipe are also connected via a direct connection pipe, which is equipped with a thirteenth electric valve. The direct connection pipe is connected in parallel with both the plate heat exchanger and the steam absorption heat pump. The steam-water heat exchanger is connected to the steam pipe via a first steam branch, which is equipped with a fourteenth electric valve. The steam pipe is also connected to the steam absorption heat pump via a second steam branch, which is equipped with a fifteenth electric valve. A sixteenth electric valve is installed on the steam pipe, which is used to transport steam from the plant area to the steam-water heat exchanger and the steam absorption heat pump. The condensate supply subsystem includes a water tank, a steam-water heat exchanger connected to the water tank via a first condensate pipe, a steam absorption heat pump connected to the water tank via a second condensate pipe, and the water tank connected to the plant's softened water pipeline. The water tank is connected to a water supply pipe, which is connected to the water jacket side supply pipe. The water supply pipe is equipped with a water jacket side water supply constant pressure pump and a seventeenth electric valve for water supply when the water jacket side return water pressure is low. The plate heat exchanger, steam absorption heat pump, and steam-water heat exchanger can all operate independently, or they can be combined in any two or three ways.

2. The industrial waste heat utilization and heating system for carbon plants as described in claim 1, characterized in that, The plate heat exchanger is connected to the municipal return water pipe, and a dirt remover and a municipal circulating water pump are installed on the municipal return water pipe; a first electric valve is installed between the plate heat exchanger and the municipal return water pipe, and the plate heat exchanger is also connected to the municipal water supply branch.

3. The industrial waste heat utilization heating system for carbon plants as described in claim 2, characterized in that, The municipal side return water pipe is also connected to the municipal side supply water branch through the municipal side first branch. The municipal side first branch and the plate heat exchanger are connected in parallel. The municipal side first branch is equipped with a second electric valve.

4. The industrial waste heat utilization heating system for carbon plants as described in claim 3, characterized in that, The municipal water supply branch is also connected to the municipal second branch, which is connected to the steam absorption heat pump. The municipal water supply branch is also connected to the municipal third branch, which is connected in parallel with the steam absorption heat pump. The municipal second branch is connected to the municipal third branch after the steam absorption heat pump outlet. The municipal second branch is equipped with a third electric valve, and the municipal third branch is equipped with a fourth electric valve.

5. The industrial waste heat utilization heating system for carbon plants as described in claim 4, characterized in that, The municipal side third branch road connects to the municipal side fourth branch road, the municipal side fourth branch road connects to the steam-water heat exchanger, the municipal side third branch road also connects to the municipal side fifth branch road, the municipal side fifth branch road and the steam-water heat exchanger are connected in parallel, the municipal side fourth branch road connects to the municipal side fifth branch road after the steam-water heat exchanger outlet, the municipal side fourth branch road is equipped with a fifth electric valve, the municipal side fifth branch road is equipped with a sixth electric valve; the municipal side fifth branch road connects to the municipal side water supply pipe to provide hot water to the municipal side.

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