A multi-source energy utilization system that uses sintering waste heat to generate electricity and couple it with heating.

Abstract

This invention discloses an energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply. It belongs to the field of waste heat power generation technology in steel enterprises. In order to utilize waste heat steam sources of different qualities in steel enterprises to generate electricity, the energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply includes an electric furnace waste heat system (1), a converter waste heat system (2), a sintering waste heat system (3), a rolling mill heating furnace waste heat system (4), a steam storage tank (5), a heat exchange device (6), a power generation system (7), and a hot water storage tank (8). The energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply can not only integrate waste heat steam sources of various parameters and qualities in the steel plant for power generation, but also recover the heat of the circulating cooling water of the generator set and supply hot water to the outside, further improving the waste heat utilization rate.

Description

Technical Field

[0001] This invention relates to the field of waste heat power generation technology in steel enterprises, specifically an energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply. Background Technology

[0002] Industrial enterprises, especially steel mills, possess numerous waste heat resources that can be utilized to generate steam for external transmission. Examples include sintering waste heat steam, converter waste heat steam, electric arc furnace waste heat steam, and rolling mill heating furnace waste heat steam. Sintering waste heat steam, due to its higher temperature, is typically used in power generation systems. However, the large quantities of saturated steam generated through vaporization cooling in converter steelmaking, electric arc furnace steelmaking, and rolling mill heating furnace systems cannot be widely used by industrial users due to steam quality issues and the intermittent nature of converter and electric arc furnace processes. Most of the steam is used for low-quality applications such as domestic or heating systems via the plant's low-pressure steam network. Furthermore, because user consumption is small and lacks continuity, a significant amount of waste heat saturated steam is still released into the atmosphere, reducing the overall economic benefits of the enterprise and causing environmental pollution.

[0003] Therefore, combining steam sources of different qualities before supplying them to industrial users or for power generation to increase efficiency has become a popular and widely accepted technical approach in recent years. Conventional combined steam sources simply deliver steam of different qualities to the user side, relying on the user to absorb the differences between the steam sources to achieve the combined effect. However, this method typically places higher demands on users, requiring a wide range of usable steam parameters, and the system is complex, often requiring separate auxiliary equipment for different steam qualities, resulting in high investment and maintenance costs. Summary of the Invention

[0004] In order to utilize waste heat steam sources of different qualities in steel enterprises for power generation, this invention provides an energy utilization system that utilizes multiple steam sources to improve the efficiency of power generation from sintering waste heat and couples it with heat supply. The energy utilization system that utilizes multiple steam sources to improve the efficiency of power generation from sintering waste heat and couples it with heat supply can not only integrate waste heat steam sources of various parameters and qualities in steel plants for power generation, but also recover the heat of the generator set's circulating cooling water and supply hot water to the outside, further improving the waste heat utilization rate.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply includes an electric furnace waste heat system, a converter waste heat system, a sintering waste heat system, a rolling mill heating furnace waste heat system, a steam storage tank, a heat exchange device, a power generation system, and a hot water storage tank. Waste heat steam from the electric furnace waste heat system can enter the heat exchange device to absorb heat or be stored in the steam storage tank. Waste heat steam from the converter waste heat system can enter the heat exchange device to absorb heat or be stored in the steam storage tank. Steam in the steam storage tank can enter the heat exchange device to absorb heat. Waste heat steam from the rolling mill heating furnace waste heat system can enter the heat exchange device to absorb heat. Sintering waste heat steam from the sintering waste heat system can enter the heat exchange device to release heat. The power generation system includes a steam turbine and a condenser. Steam discharged from the heat exchange device can enter the steam turbine of the power generation system, and steam discharged from the steam turbine can enter the condenser to release heat. Water in the hot water storage tank can enter the condenser to absorb heat.

[0007] The heat exchange device includes a first steam heat absorption inlet, a first steam heat absorption outlet, a first steam heat release inlet, a first steam heat release outlet, a second steam heat absorption inlet, a second steam heat absorption outlet, a second steam heat release inlet, and a second steam heat release outlet.

[0008] The electric furnace waste heat system includes an electric furnace waste heat steam supply pipeline, the converter waste heat system includes a converter waste heat steam supply pipeline, the electric furnace waste heat steam supply pipeline and the converter waste heat steam supply pipeline are connected to the first steam absorption inlet of the heat exchange device through a steam mixing header, and the rolling mill heating furnace waste heat system is connected to the second steam absorption inlet of the heat exchange device through the rolling mill heating furnace waste heat steam supply pipeline.

[0009] The sintering waste heat system includes a sintering high-pressure steam generation pipeline and a sintering low-pressure steam generation pipeline. The sintering high-pressure steam generation pipeline is connected to the first steam heat release inlet, and the sintering low-pressure steam generation pipeline is connected to the second steam heat release inlet.

[0010] The energy utilization system that utilizes sintering waste heat to improve power generation and couple heat supply contains two steam storage tanks. One steam storage tank is connected to the electric furnace waste heat steam supply pipeline through a first steam inlet / outlet pipe, and the other steam storage tank is connected to the converter waste heat steam supply pipeline through a second steam inlet / outlet pipe.

[0011] The heat exchange device is a waste heat boiler. The heat exchange device contains an inner chamber, in which a first heat absorption pipe, a first heat release pipe, a second heat absorption pipe, and a second heat release pipe are installed.

[0012] The first steam heat absorption inlet and the first steam heat absorption outlet are located at the two ends of the first heat absorption tube, the first steam heat release inlet and the first steam heat release outlet are located at the two ends of the first heat release tube, the second steam heat absorption inlet and the second steam heat absorption outlet are located at the two ends of the second heat absorption tube, and the second steam heat release inlet and the second steam heat release outlet are located at the two ends of the second heat release tube.

[0013] The steam turbine is a condensing steam turbine with supplemental steam. The condensing steam turbine with supplemental steam includes a high-pressure cylinder and a low-vacuum low-pressure cylinder connected in sequence. The main steam inlet of the high-pressure cylinder is connected to a main steam input pipeline, and the supplemental steam inlet of the high-pressure cylinder is connected to a supplemental steam input pipeline. The first steam heat absorption outlet is connected to the main steam input pipeline through a first branch pipe, the first steam heat release outlet is connected to the main steam input pipeline through a second branch pipe, the second steam heat absorption outlet is connected to the supplemental steam input pipeline through a third branch pipe, and the second steam heat release outlet is connected to the supplemental steam input pipeline through a fourth branch pipe.

[0014] The steam outlet of the high-pressure cylinder is connected to the steam inlet of the low-vacuum low-pressure cylinder. The condenser contains a heat-exhausting working medium inlet, a heat-exhausting working medium outlet, a heat-absorbing working medium inlet, and a heat-absorbing working medium outlet. The steam outlet of the low-vacuum low-pressure cylinder is connected to the heat-exhausting working medium inlet of the condenser. A water supply pipe is connected to the heat-exhausting working medium outlet of the condenser.

[0015] The outlet of the hot water storage tank is connected to the heat absorption medium inlet of the condenser through the inlet pipe, and the inlet of the hot water storage tank is connected to the heat absorption medium outlet of the condenser through the outlet pipe. The inlet pipe is connected to the return water pipeline of the end user's heating network, and the outlet pipe is connected to the supply water pipeline of the end user's heating network.

[0016] The beneficial effects of this invention are:

[0017] 1. Integrate waste heat steam sources with various parameters and qualities within the steel plant and apply them to the power generation system to improve the utilization rate of waste heat steam.

[0018] 2. Peak shaving and valley filling of intermittent waste heat resources from electric furnaces and converters, ensuring stable external transmission and improving steam parameter quality.

[0019] 3. When improving the quality of saturated steam with different parameters, sintered waste heat boiler evaporators are used. Depending on the application scenario, integrated or split structures can be adopted to improve the energy efficiency of waste heat resources of different qualities, and all of them are connected to the power generation system.

[0020] 4. By adopting a low-vacuum, low-pressure cylinder and a low-vacuum condenser, the heat of the generator set's circulating cooling water is recovered and hot water is supplied to the outside, thereby further improving the waste heat utilization rate.

[0021] 5. Energy storage devices are used in the external hot water supply network to temporarily store the excess heat in the generator set's circulating water. This can be applied to end users with intermittent heat needs, thereby increasing the energy supply area for these users. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, 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 a split-type structure for the heat exchange device of the energy utilization system described in this invention, which utilizes sintering waste heat to improve power generation efficiency and couples it with heat supply.

[0024] Figure 2 This is a schematic diagram of the heat exchange device of the energy utilization system described in this invention, which utilizes sintering waste heat to improve power generation efficiency and couples it with heat supply. The heat exchange device is an integrated structure.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Electric furnace waste heat system; 2. Converter waste heat system; 3. Sintering waste heat system; 4. Steel rolling heating furnace waste heat system; 5. Steam storage tank; 6. Heat exchange device; 7. Power generation system; 8. Hot water storage tank;

[0027] 11. Waste heat steam supply pipeline for electric furnace;

[0028] 21. Converter waste heat steam supply pipeline;

[0029] 31. Sintered high-pressure steam generation pipeline; 32. Sintered low-pressure steam generation pipeline;

[0030] 41. Waste heat steam supply pipeline for steel rolling heating furnace;

[0031] 51. First steam inlet / outlet pipe; 52. Second steam inlet / outlet pipe;

[0032] 61. First steam heat absorption inlet; 62. First steam heat absorption outlet; 63. First steam heat release inlet; 64. First steam heat release outlet; 65. Second steam heat absorption inlet; 66. Second steam heat absorption outlet; 67. Second steam heat release inlet; 68. Second steam heat release outlet; 69. Steam mixing header; 610. Inner chamber; 611. First heat absorption pipe; 612. First heat release pipe; 613. Second heat absorption pipe; 614. Second heat release pipe; 615. Valve;

[0033] 71. Condenser; 72. High and intermediate pressure cylinder; 73. Low vacuum and low pressure cylinder; 74. Main steam input pipeline; 75. Makeup steam input pipeline; 76. Makeup water pipe;

[0034] 81. Inlet pipe; 82. Outlet pipe; 83. End-user heating network water supply pipeline; 84. End-user heating network return pipeline;

[0035] 621. First branch pipe;

[0036] 641. Second branch pipe;

[0037] 661. Third branch pipe;

[0038] 681. Fourth branch pipe. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] An energy utilization system that utilizes sintering waste heat from multiple steam sources to improve power generation efficiency and couples it with heat supply includes an electric furnace waste heat system 1, a converter waste heat system 2, a sintering waste heat system 3, a rolling mill heating furnace waste heat system 4, a steam storage tank 5, a heat exchange device 6, a power generation system 7, and a hot water storage tank 8. The waste heat steam from the electric furnace in the electric furnace waste heat system 1 can enter the heat exchange device 6 to absorb heat or be stored in the steam storage tank 5. The waste heat steam from the converter in the converter waste heat system 2 can enter the heat exchange device 6 to absorb heat or be stored in the steam storage tank 5. The steam from the rolling mill heating furnace waste heat system 4 can enter the heat exchanger 6 to absorb heat. The sintering waste heat steam from the sintering waste heat system 3 can enter the heat exchanger 6 to release heat. The power generation system 7 contains a steam turbine and a condenser 71. The steam discharged from the heat exchanger 6 can enter the steam turbine of the power generation system 7 (to drive the steam turbine to do work and generate electricity). The steam discharged from the steam turbine can enter the condenser 71 to release heat. The water in the hot water storage tank 8 can enter the condenser 71 to absorb heat. Figure 1 As shown.

[0041] In this embodiment, the heat exchange device 6 includes a first steam heat absorption inlet 61, a first steam heat absorption outlet 62, a first steam heat release inlet 63, a first steam heat release outlet 64, a second steam heat absorption inlet 65, a second steam heat absorption outlet 66, a second steam heat release inlet 67, and a second steam heat release outlet 68.

[0042] Steam entering from the first steam heat absorption inlet 61 absorbs heat in the heat exchanger 6 and then exits from the first steam heat absorption outlet 62. Steam entering from the first steam heat release inlet 63 releases heat in the heat exchanger 6 and then exits from the first steam heat release outlet 64. Steam entering from the second steam heat absorption inlet 65 absorbs heat in the heat exchanger 6 and then exits from the second steam heat absorption outlet 66. Steam entering from the second steam heat release inlet 67 releases heat in the heat exchanger 6 and then exits from the second steam heat release outlet 68.

[0043] In this embodiment, the electric furnace waste heat system 1 includes an electric furnace waste heat steam supply pipeline 11, and the electric furnace waste heat steam generated by the electric furnace waste heat system 1 enters the electric furnace waste heat steam supply pipeline 11. The converter waste heat system 2 includes a converter waste heat steam supply pipeline 21, and the converter waste heat steam generated by the converter waste heat system 2 enters the converter waste heat steam supply pipeline 21. The rolling mill heating furnace waste heat system 4 is connected to the second steam heat absorption inlet 65 of the heat exchange device 6 through the rolling mill heating furnace waste heat steam supply pipeline 41.

[0044] In this embodiment, the electric furnace waste heat steam supply line 11 and the converter waste heat steam supply line 21 are connected to the first steam absorption inlet 61 of the heat exchange device 6 via a steam mixing header 69. The sintering waste heat system 3 includes a sintering high-pressure steam generation pipeline 31 and a sintering low-pressure steam generation pipeline 32. The sintering high-pressure steam generation pipeline 31 is connected to the first steam release inlet 63, and the sintering low-pressure steam generation pipeline 32 is connected to the second steam release inlet 67. The high-pressure waste heat steam generated by the sintering machine enters the sintering high-pressure steam generation pipeline 31, and the low-pressure waste heat steam generated by the sintering machine enters the sintering low-pressure steam generation pipeline 32.

[0045] In this embodiment, a valve 615 is provided on the steam mixing header 69, which can regulate the gas flow rate of the steam mixing header 69. The multi-steam-source energy utilization system that uses sintering waste heat to generate electricity and couple heat supply may include two steam storage tanks 5. One steam storage tank 5 is connected to the electric furnace waste heat steam supply pipeline 11 via a first steam inlet / outlet pipe 51, and the other steam storage tank 5 is connected to the converter waste heat steam supply pipeline 21 via a second steam inlet / outlet pipe 52. The structure of the steam storage tank 5 is roughly the same as that of a common sealed gas storage tank or liquid storage tank. The outer side of the steam storage tank 5 is provided with a good insulation layer to store the heat energy in the steam, such as... Figure 1 As shown.

[0046] When the steam flow rate in the electric furnace waste heat steam supply pipeline 11 is high, the electric furnace waste heat steam in the electric furnace waste heat system 1 can enter the steam storage tank 5 and the heat exchange device 6. When the steam flow rate in the electric furnace waste heat steam supply pipeline 11 is low, the steam stored in the steam storage tank 5 can enter the heat exchange device 6. When the steam flow rate in the converter waste heat steam supply pipeline 21 is high, the converter waste heat steam in the converter waste heat system 2 can enter the steam storage tank 5 and the heat exchange device 6. When the steam flow rate in the converter waste heat steam supply pipeline 21 is low, the steam stored in the steam storage tank 5 can enter the heat exchange device 6. The steam storage tank 5 and valve 615 work together to achieve peak shaving and valley filling of intermittent waste heat resources from the electric furnace and converter, ensuring stable external delivery and improving steam parameter quality. In addition, valve 615 can be installed on each of the other pipelines.

[0047] In this embodiment, the heat exchange device 6 is a waste heat boiler. Since the heat source of the waste heat boiler comes from the sintering machine, the waste heat boiler can also be called a sintering waste heat boiler. The heat exchange device 6 can be a split structure, containing two inner chambers 610. One inner chamber 610 is equipped with a first heat absorption pipe 611 and a first heat release pipe 612, and the other inner chamber 610 is equipped with a second heat absorption pipe 613 and a second heat release pipe 614. The first heat absorption pipe 611 and the second heat absorption pipe 613 can be the evaporator of the waste heat boiler, such as... Figure 1 As shown. Alternatively, the heat exchanger 6 can also be an integral structure, containing an inner chamber 610, within which are arranged a first heat absorption pipe 611, a first heat release pipe 612, a second heat absorption pipe 613, and a second heat release pipe 614, as shown. Figure 2 As shown.

[0048] In this embodiment, the first steam heat absorption inlet 61 and the first steam heat absorption outlet 62 are located at both ends of the first heat absorption tube 611, the first steam heat release inlet 63 and the first steam heat release outlet 64 are located at both ends of the first heat release tube 612, the second steam heat absorption inlet 65 and the second steam heat absorption outlet 66 are located at both ends of the second heat absorption tube 613, and the second steam heat release inlet 67 and the second steam heat release outlet 68 are located at both ends of the second heat release tube 614. The waste heat system 4 of the rolling mill heating furnace is connected to the second steam heat absorption inlet 65 of the heat exchange device 6 through the waste heat steam supply pipeline 41 of the rolling mill heating furnace, and the waste heat steam generated by the waste heat system 4 of the rolling mill heating furnace enters the waste heat steam supply pipeline 41 of the rolling mill heating furnace.

[0049] In this embodiment, the steam turbine is an existing condensing steam turbine with supplemental steam. The condensing steam turbine with supplemental steam includes a high-pressure cylinder 72 and a low-vacuum low-pressure cylinder 73 connected in sequence. The main steam inlet of the high-pressure cylinder 72 is connected to a main steam input pipeline 74, and the supplemental steam inlet of the high-pressure cylinder 72 is connected to a supplemental steam input pipeline 75. The first steam heat absorption outlet 62 is connected to the main steam input pipeline 74 through a first branch pipe 621, the first steam heat release outlet 64 is connected to the main steam input pipeline 74 through a second branch pipe 641, the second steam heat absorption outlet 66 is connected to the supplemental steam input pipeline 75 through a third branch pipe 661, and the second steam heat release outlet 68 is connected to the supplemental steam input pipeline 75 through a fourth branch pipe 681.

[0050] In this embodiment, the steam outlet of the high-pressure cylinder 72 is connected to the steam inlet of the low-vacuum low-pressure cylinder 73. The condenser 71 is a conventional low-vacuum condenser, which includes an exothermic working fluid inlet, an exothermic working fluid outlet, an endothermic working fluid inlet, and an endothermic working fluid outlet. The steam outlet of the low-vacuum low-pressure cylinder 73 is connected to the exothermic working fluid inlet of the condenser 71, and a water supply pipe 76 is connected to the external end of the exothermic working fluid outlet of the condenser 71. The condenser 71 can convert the steam discharged from the steam outlet of the condensing steam turbine into water for use as makeup water in the waste heat boiler.

[0051] The outlet of the hot water storage tank 8 is connected to the heat absorption medium inlet of the condenser 71 via the inlet pipe 81, and the inlet of the hot water storage tank 8 is connected to the heat absorption medium outlet of the condenser 71 via the outlet pipe 82. The inlet pipe 81 is connected to the return water pipeline 84 of the end-user heating network, and the outlet pipe 82 is connected to the supply water pipeline 83 of the end-user heating network. The hot water storage tank 8 is used in the external hot water supply network to temporarily store excess heat in the generator set's circulating water. This can be applied to end-users with intermittent heat needs, thereby increasing the energy supply area for these users. The structure of the hot water storage tank 8 can be the same as that of the steam storage tank 5.

[0052] The following describes the working process of the energy utilization system that utilizes sintering waste heat to generate electricity and couple it with heat supply.

[0053] When the steam flow rate in the electric furnace waste heat steam supply pipeline 11 is high, the electric furnace waste heat steam in the electric furnace waste heat system 1 enters the steam accumulator tank 5 for storage and heat exchange device 6 for heat absorption. When the steam flow rate in the electric furnace waste heat steam supply pipeline 11 is low, the steam stored in the steam accumulator tank 5 enters the heat exchange device 6 for heat absorption. When the steam flow rate in the converter waste heat steam supply pipeline 21 is high, the converter waste heat steam in the converter waste heat system 2 enters the steam accumulator tank 5 for storage and heat exchange device 6 for heat absorption. When the steam flow rate in the converter waste heat steam supply pipeline 21 is low, the steam stored in the steam accumulator tank 5 enters the heat exchange device 6 for heat absorption. After absorbing heat in the heat exchange device 6, the electric furnace waste heat steam and the converter waste heat steam enter the main steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine through the main steam input pipeline 74, driving the supplementary steam condensing turbine to generate electricity.

[0054] The waste heat steam from the steel rolling furnace in the waste heat system 4 enters the heat exchange device 6 to absorb heat. After absorbing heat, the waste heat steam from the steel rolling furnace enters the high-pressure cylinder 72 of the condensing steam turbine through the supplementary steam input pipeline 75, driving the condensing steam turbine to generate electricity.

[0055] The high-pressure superheated steam (approximately 1.6 MPa-2.6 MPa) generated by the sintering waste heat system 3 first enters the heat exchanger 6 to release heat via the high-pressure steam transmission pipeline 31, and then enters the main steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine via the main steam input pipeline 74, driving the supplementary steam condensing turbine to generate electricity. The low-pressure superheated steam (approximately 0.3 MPa-0.8 MPa) generated by the sintering waste heat system 3 first enters the heat exchanger 6 to release heat, and then enters the supplementary steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine via the supplementary steam input pipeline 75, driving the supplementary steam condensing turbine to generate electricity.

[0056] Steam discharged from the high- and medium-pressure cylinder 72 of the condensing steam turbine enters the low-vacuum low-pressure cylinder 73 of the condensing steam turbine to drive the condensing steam turbine to generate electricity. Steam discharged from the low-vacuum low-pressure cylinder 73 of the condensing steam turbine enters the condenser 71 to release heat and becomes condensate before being discharged.

[0057] Water in the hot water storage tank 8 can enter the condenser 71 to absorb heat and then return to the hot water storage tank 8. As needed, water in the hot water storage tank 8 can enter the end-user heating network supply line 83 for heating use by the end-users. Water in the end-user heating network return line 84 can enter the hot water storage tank 8 to replenish it. Alternatively, water in the end-user heating network return line 84 can enter the condenser 71 to absorb heat and then return to the end-user heating network supply line 83 for heating use by the end-users.

[0058] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used together.

Claims

1. An energy utilization system that utilizes multiple steam sources to generate electricity from sintering waste heat and couples it with heat supply, characterized in that, The energy utilization system that utilizes sintering waste heat to improve efficiency and generate electricity while coupling with heating includes an electric furnace waste heat system (1), a converter waste heat system (2), a sintering waste heat system (3), a steel rolling heating furnace waste heat system (4), a steam storage tank (5), a heat exchange device (6), a power generation system (7), and a hot water storage tank (8). The waste heat steam from the electric furnace in the waste heat system (1) can enter the heat exchange device (6) to absorb heat or enter the steam storage tank (5) for storage. The waste heat steam from the converter in the waste heat system (2) can enter the heat exchange device (6) to absorb heat or enter the steam storage tank (5) for storage. The steam in the steam storage tank (5) can enter the heat exchange device (6) to absorb heat. The waste heat steam from the rolling mill in the waste heat system (4) can enter the heat exchange device (6) to absorb heat. The waste heat steam from the sintering in the waste heat system (3) can enter the heat exchange device (6) to release heat. The power generation system (7) contains a steam turbine and a condenser (71). The steam discharged from the heat exchange device (6) can enter the steam turbine of the power generation system (7). The steam discharged from the steam turbine can enter the condenser (71) to release heat. The water in the hot water storage tank (8) can enter the condenser (71) to absorb heat. The heat exchange device (6) includes a first steam heat absorption inlet (61), a first steam heat absorption outlet (62), a first steam heat release inlet (63), a first steam heat release outlet (64), a second steam heat absorption inlet (65), a second steam heat absorption outlet (66), a second steam heat release inlet (67), and a second steam heat release outlet (68). The sintering waste heat system (3) includes a sintering high-pressure steam generation pipeline (31) and a sintering low-pressure steam generation pipeline (32). The sintering high-pressure steam generation pipeline (31) is connected to the first steam heat release inlet (63), and the sintering low-pressure steam generation pipeline (32) is connected to the second steam heat release inlet (67). The heat exchange device (6) is a waste heat boiler. The heat exchange device (6) contains an inner chamber (610). The inner chamber (610) is provided with a first heat absorption pipe (611), a first heat release pipe (612), a second heat absorption pipe (613), and a second heat release pipe (614). The steam turbine is a condensing steam turbine with supplementary steam. The condensing steam turbine with supplementary steam includes a high-pressure cylinder (72) and a low-vacuum low-pressure cylinder (73) connected in sequence. The main steam inlet of the high-pressure cylinder (72) is connected to the main steam input pipeline (74), and the supplementary steam inlet of the high-pressure cylinder (72) is connected to the supplementary steam input pipeline (75). The first steam heat absorption outlet (62) is connected to the main steam input pipeline (74) through the first branch pipe (621), the first steam heat release outlet (64) is connected to the main steam input pipeline (74) through the second branch pipe (641), the second steam heat absorption outlet (66) is connected to the supplementary steam input pipeline (75) through the third branch pipe (661), and the second steam heat release outlet (68) is connected to the supplementary steam input pipeline (75) through the fourth branch pipe (681). The steam outlet of the high-pressure cylinder (72) is connected to the steam inlet of the low-vacuum low-pressure cylinder (73). The condenser (71) contains a heat-releasing working medium inlet, a heat-releasing working medium outlet, a heat-absorbing working medium inlet and a heat-absorbing working medium outlet. The steam outlet of the low-vacuum low-pressure cylinder (73) is connected to the heat-releasing working medium inlet of the condenser (71). A water supply pipe (76) is connected to the heat-releasing working medium outlet of the condenser (71).

2. The energy utilization system for multi-steam source energy generation and coupled heating using sintering waste heat as described in claim 1, characterized in that, The electric furnace waste heat system (1) includes an electric furnace waste heat steam supply pipeline (11), the converter waste heat system (2) includes a converter waste heat steam supply pipeline (21), the electric furnace waste heat steam supply pipeline (11) and the converter waste heat steam supply pipeline (21) are connected to the first steam heat absorption inlet (61) of the heat exchange device (6) through a steam mixing header (69), and the rolling mill heating furnace waste heat system (4) is connected to the second steam heat absorption inlet (65) of the heat exchange device (6) through the rolling mill heating furnace waste heat steam supply pipeline (41).

3. The energy utilization system for multi-steam source energy generation and coupled heating using sintering waste heat as described in claim 2, characterized in that, The energy utilization system that utilizes sintering waste heat to generate electricity and couples it to provide heat contains two steam storage tanks (5). One steam storage tank (5) is connected to the electric furnace waste heat steam supply pipeline (11) through the first steam inlet / outlet pipe (51), and the other steam storage tank (5) is connected to the converter waste heat steam supply pipeline (21) through the second steam inlet / outlet pipe (52).

4. The energy utilization system for multi-steam source energy generation and coupled heating using sintering waste heat as described in claim 1, characterized in that, The first steam heat absorption inlet (61) and the first steam heat absorption outlet (62) are located at both ends of the first heat absorption tube (611), the first steam heat release inlet (63) and the first steam heat release outlet (64) are located at both ends of the first heat release tube (612), the second steam heat absorption inlet (65) and the second steam heat absorption outlet (66) are located at both ends of the second heat absorption tube (613), and the second steam heat release inlet (67) and the second steam heat release outlet (68) are located at both ends of the second heat release tube (614).

5. The energy utilization system for multi-steam source utilization of sintering waste heat to improve power generation and coupled heating as described in claim 1, characterized in that, The outlet of the hot water storage tank (8) is connected to the heat absorption medium inlet of the condenser (71) through the inlet pipe (81), the inlet of the hot water storage tank (8) is connected to the heat absorption medium outlet of the condenser (71) through the outlet pipe (82), the inlet pipe (81) is connected to the return water pipeline (84) of the end user's heating network, and the outlet pipe (82) is connected to the supply water pipeline (83) of the end user's heating network.

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