A system that utilizes multiple steam sources to improve power generation efficiency and couples it with heating using a gas-fired superheater.

Abstract

This invention discloses a system for improving the efficiency of power generation and coupling heat supply using a gas-fired superheater with multiple steam sources. It belongs to the field of waste heat power generation technology in steel enterprises. To utilize waste heat steam sources of different qualities in steel enterprises for power generation, the system 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 gas-fired steam superheater (6), a power generation system (7), and a hot water storage tank (8). This system not only integrates waste heat steam sources of various parameters and qualities within the steel plant for power generation, but also recovers heat from the circulating cooling water of the generator set and supplies hot water externally, 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 a system that utilizes a multi-steam-source gas-fired superheater to improve power generation efficiency and couple 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 a system for improving the efficiency of power generation and coupling heating by using a gas-fired superheater for multiple steam sources. The system 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 circulating cooling water of the generator set 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] A multi-steam-source system utilizing a gas-fired superheater to improve power generation and couple 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 gas-fired steam superheater, a power generation system, and a hot water storage tank. The waste heat steam from the electric furnace in the electric furnace waste heat system can be stored in the steam storage tank or heated in the gas-fired steam superheater. Similarly, the waste heat steam from the converter in the converter waste heat system can be stored in the steam storage tank or heated in the gas-fired steam superheater. Steam can be heated by entering a gas-fired steam superheater. Waste heat steam from the rolling mill heating furnace in the waste heat system can also be heated by entering a gas-fired steam superheater. The power generation system includes a steam turbine and a condenser. The gas-fired steam superheater can heat the steam, and the heated steam can enter the steam turbine of the power generation system. Waste heat steam from the sintering waste heat system can also enter the steam turbine of the power generation system. The steam discharged from the steam turbine can release heat in the condenser, and the water in the hot water storage tank can absorb heat in the condenser.

[0007] The gas-fired steam superheater includes a first steam inlet, a first steam outlet, a second steam inlet, a second steam outlet, and a gas nozzle.

[0008] The electric furnace waste heat system includes an electric furnace waste heat steam supply pipeline, and 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 inlet of the gas-fired steam superheater through a steam mixing header.

[0009] The system for improving power generation and coupling heating by utilizing a gas-fired superheater with multiple steam sources includes two steam storage tanks. One steam storage tank is connected to the waste heat steam supply pipeline of the electric furnace through a first steam inlet / outlet pipe, and the other steam storage tank is connected to the waste heat steam supply pipeline of the converter through a second steam inlet / outlet pipe.

[0010] The waste heat system of the rolling mill heating furnace is connected to the second steam inlet of the gas-fired steam superheater through the waste heat steam supply pipeline of the rolling mill heating furnace.

[0011] The gas-fired steam superheater is equipped with a furnace, and a first heat absorption tube and a second heat absorption tube are installed inside the furnace. The first steam inlet and the first steam outlet are located at the two ends of the first heat absorption tube, and the second steam inlet and the second steam outlet are located at the two ends of the second heat absorption tube, respectively.

[0012] 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 first steam outlet of the gas-fired steam superheater is connected to the main steam inlet of the high-pressure cylinder through the main steam input pipeline. The second steam outlet of the gas-fired steam superheater is connected to the supplemental steam inlet of the high-pressure cylinder through the supplemental steam input pipeline.

[0013] 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 main steam input pipeline, and the sintering low-pressure steam generation pipeline is connected to the make-up steam input pipeline.

[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, gas-fired steam superheating devices 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 integrated into 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 the integrated structure of the gas-fired steam superheater device in the multi-steam-source power generation and coupled heating system described in this invention.

[0024] Figure 2This is a schematic diagram of a split-type structure for the gas-fired steam superheater device in the multi-steam-source power generation and coupled heating system described in this invention.

[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. Gas-fired steam superheater; 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 inlet; 62. First steam outlet; 63. Second steam inlet; 64. Second steam outlet; 65. Steam mixing header; 66. Furnace; 67. First heat absorber pipe; 68. Second heat absorber pipe; 69. Valve; 610. Gas nozzle;

[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. Detailed Implementation

[0035] 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.

[0036] A multi-steam-source system utilizing a gas-fired superheater to improve power generation and couple heating 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 gas-fired steam superheater 6, and a power generation system 7. The waste heat steam from the electric furnace in the electric furnace waste heat system 1 can be stored in the steam storage tank 5 or heated in the gas-fired steam superheater 6. The waste heat steam from the converter in the converter waste heat system 2 can be stored in the steam storage tank 5 or heated in the gas-fired steam superheater 6. The steam in the steam storage tank 5 can enter the gas-fired steam superheater. The waste heat steam from the rolling mill heating furnace in the waste heat system 4 can be heated in the gas-fired steam superheater 6. The power generation system 7 contains a steam turbine and a condenser 71. The gas-fired steam superheater 6 can heat the steam, and the heated steam can enter the steam turbine of the power generation system 7 (to drive the steam turbine to generate electricity). The sintering waste heat steam from the sintering waste heat system 3 can also enter the steam turbine of the power generation system 7 (to drive the steam turbine to generate electricity). The steam discharged from the steam turbine can enter the condenser 71 to release heat, and the water in the hot water storage tank 8 can enter the condenser 71 to absorb heat. Figure 1 As shown.

[0037] 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.

[0038] In this embodiment, the gas-fired steam superheater 6 includes a first steam inlet 61, a first steam outlet 62, a second steam inlet 63, a second steam outlet 64, and a gas nozzle 610. The electric furnace waste heat steam supply line 11 and the converter waste heat steam supply line 21 are connected to the first steam inlet 61 of the gas-fired steam superheater 6 through a steam mixing header 65. The electric furnace waste heat steam and the converter waste heat steam enter the gas-fired steam superheater 6 through the steam mixing header 65.

[0039] In this embodiment, a valve 69 is provided on the steam mixing header 65, which can regulate the gas flow rate of the steam mixing header 65. The multi-steam-source system that utilizes a gas-fired superheater to improve power generation 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.

[0040] 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 gas-fired steam superheater 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 gas-fired steam superheater 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 gas-fired steam superheater 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 gas-fired steam superheater 6. The steam storage tank 5 and valve 69 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, valves 69 can be installed on each of the other pipelines.

[0041] In this embodiment, the gas-fired steam superheater 6 has a structure basically the same as that of an existing gas-fired heating furnace. The gas-fired steam superheater 6 includes a furnace chamber 66, which is heated by burning combustible gas within it. The combustible gas burned in the gas-fired steam superheater 6 can be recovered coal gas from electric furnaces, converters, and sintering machines in steel enterprises, thereby achieving full utilization of energy. The gas nozzle 610 of the gas-fired steam superheater 6 can be connected to the electric furnace, converter, and sintering machine via a gas delivery pipeline.

[0042] In this embodiment, the gas-fired steam superheater 6 can be an integrated structure, that is, the gas-fired steam superheater 6 contains a furnace 66, and the furnace 66 is provided with a first heat absorption pipe 67 and a second heat absorption pipe 68, such as... Figure 1 As shown. Alternatively, the gas-fired steam superheater 6 can also be a split structure, that is, the gas-fired steam superheater 6 contains two furnaces 66, one furnace 66 is equipped with a first heat absorption tube 67, and the other furnace 66 is equipped with a second heat absorption tube 68, as shown. Figure 2 As shown.

[0043] In this embodiment, the first steam inlet 61 and the first steam outlet 62 are located at the two ends of the first heat absorption tube 67, and the second steam inlet 63 and the second steam outlet 64 are located at the two ends of the second heat absorption tube 68, respectively. Steam can enter the first heat absorption tube 67 and the second heat absorption tube 68 to be heated. The waste heat system 4 of the rolling mill heating furnace is connected to the second steam inlet 63 of the gas-fired steam superheating device 6 through the waste heat steam supply pipeline 41 of the rolling mill heating furnace. 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, such as... Figure 1 As shown.

[0044] 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 first steam outlet 62 of the gas-fired steam superheater 6 is connected to the main steam inlet of the high-pressure cylinder 72 through the main steam input pipeline 74. The second steam outlet 64 of the gas-fired steam superheater 6 is connected to the supplemental steam inlet of the high-pressure cylinder 72 through the supplemental steam input pipeline 75.

[0045] In this embodiment, 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 high-pressure superheated steam (steam pressure of approximately 1.6MPa-2.6MPa) generated by the sintering waste heat system 3 enters the sintering high-pressure steam generation pipeline 31, and the low-pressure superheated steam (steam pressure of approximately 0.3MPa-0.8MPa) generated by the sintering waste heat system 3 enters the sintering low-pressure steam generation pipeline 32. The sintering high-pressure steam generation pipeline 31 is connected to the main steam input pipeline 74, and the sintering low-pressure steam generation pipeline 32 is connected to the make-up steam input pipeline 75.

[0046] 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 an existing low-vacuum condenser, containing 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 makeup water pipe 76 is connected to the external outlet of the exothermic working fluid of the condenser 71. The condenser 71 converts the steam discharged from the steam outlet of the condensing steam turbine into water for use as makeup water in the waste heat boiler.

[0047] 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.

[0048] The following describes the working process of the system that utilizes a gas-fired superheater to improve power generation efficiency and couple heat supply.

[0049] 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 5 for storage and absorbs heat in the gas-fired steam superheater 6. When the steam flow rate in the electric furnace waste heat steam supply pipeline 11 is low, the steam stored in the steam accumulator 5 enters the gas-fired steam superheater 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 5 for storage and absorbs heat in the gas-fired steam superheater 6. When the steam flow rate in the converter waste heat steam supply pipeline 21 is low, the steam stored in the steam accumulator 5 enters the gas-fired steam superheater 6 for heat absorption. The gas-fired steam superheater 6 releases heat through combustion of the gas, thereby heating the electric furnace waste heat steam and the converter waste heat steam. After being heated, 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, driving the supplementary steam condensing turbine to generate electricity.

[0050] Waste heat steam from the steel rolling furnace in the waste heat system 4 enters the gas-fired steam superheater 6. The gas in the superheater 6 burns and releases heat, thus heating the waste heat steam. This heated steam then enters the supplementary steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine, driving the turbine to generate electricity. The recovered coal gas from the steel plant also enters the gas-fired steam superheater 6 for combustion and heat release.

[0051] The high-pressure superheated steam generated by the sintering waste heat system 3 enters directly into the main steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine via the sintering high-pressure steam production pipeline 31, driving the supplementary steam condensing turbine to generate electricity. The low-pressure superheated steam generated by the sintering waste heat system 3 enters directly into the supplementary steam inlet of the intermediate and high-pressure cylinder 72 of the supplementary steam condensing turbine via the sintering low-pressure steam production pipeline 32, driving the supplementary steam condensing turbine to generate electricity.

[0052] 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.

[0053] 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.

[0054] 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. A system for improving power generation efficiency and coupling heat supply using a multi-steam-source gas-fired superheater, characterized in that, The system that utilizes a gas-fired superheater to improve power generation and couple heat supply 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 gas-fired steam superheater (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 be stored in the steam storage tank (5) or heated in the gas-fired steam superheater (6). The waste heat steam from the converter in the converter waste heat system (2) can be stored in the steam storage tank (5) or heated in the gas-fired steam superheater (6). The steam in the steam storage tank (5) can be heated in the gas-fired steam superheater (6). The waste heat steam from the rolling mill heating furnace in the rolling mill heating furnace waste heat system (4) can be heated in the gas-fired steam superheater (6). The steam superheater (6) is heated, the power generation system (7) contains a steam turbine and a condenser (71), the gas-fired steam superheater (6) can heat the steam and the heated steam can enter the steam turbine of the power generation system (7), the sintering waste heat steam in the sintering waste heat system (3) can also 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, and the water in the hot water storage tank (8) can enter the condenser (71) to absorb heat; The gas-fired steam superheater (6) includes a first steam inlet (61), a first steam outlet (62), a second steam inlet (63), a second steam outlet (64), and a gas nozzle (610). The steam turbine is a 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 first steam outlet (62) of the gas-fired steam superheater (6) is connected to the main steam inlet of the high-pressure cylinder (72) through the main steam input pipeline (74). The second steam outlet (64) of the gas-fired steam superheater (6) is connected to the supplemental steam inlet of the high-pressure cylinder (72) through the supplemental steam input pipeline (75). 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 main steam input pipeline (74), and the sintering low-pressure steam generation pipeline (32) is connected to the supplementary steam input pipeline (75). 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 system for improving power generation and coupling heat supply using a multi-steam-source gas-fired superheater as described in claim 1, characterized in that, The electric furnace waste heat system (1) includes an electric furnace waste heat steam supply line (11), and the converter waste heat system (2) includes a converter waste heat steam supply line (21). The electric furnace waste heat steam supply line (11) and the converter waste heat steam supply line (21) are connected to the first steam inlet (61) of the gas-fired steam superheater (6) through a steam mixing header (65).

3. The system for improving power generation and coupling heat supply using a multi-steam-source gas-fired superheater as described in claim 2, characterized in that, The system for improving power generation and coupling heating by utilizing a gas-fired superheater with multiple steam sources includes two steam storage tanks (5). One steam storage tank (5) is connected to the electric furnace waste heat steam supply pipeline (11) through 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) through a second steam inlet / outlet pipe (52).

4. The system for improving power generation and coupling heat supply using a multi-steam-source gas-fired superheater as described in claim 1, characterized in that, The waste heat system (4) of the steel rolling furnace is connected to the second steam inlet (63) of the gas-fired steam superheater (6) via the waste heat steam supply pipeline (41) of the steel rolling furnace.

5. The system for improving power generation and coupling heat supply using a multi-steam-source gas-fired superheater as described in claim 1, characterized in that, The gas-fired steam superheater (6) is provided with a furnace (66), and the furnace (66) is provided with a first heat absorption tube (67) and a second heat absorption tube (68). The first steam inlet (61) and the first steam outlet (62) are located at the two ends of the first heat absorption tube (67), and the second steam inlet (63) and the second steam outlet (64) are located at the two ends of the second heat absorption tube (68).

6. The system for improving power generation and coupling heat supply using a multi-steam-source gas-fired superheater 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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