A dry quenching power generation system using multi-parameter steam combined power generation and extraction

Abstract

The utility model provides a kind of dry quenching power generation system of combined steam power generation and steam extraction using multiple parameters, belongs to dry quenching power generation system technical field, comprising: dry quenching boiler, waste heat boiler, make-up extraction condensing steam turbine, generator, adjustable medium-pressure steam extraction port, low-pressure make-up regulating valve and steam-water separator;Main steam produced by dry quenching boiler is passed into the main steam port of make-up extraction condensing steam turbine by main steam pipeline, and low-pressure saturated steam produced by waste heat boiler is passed into the make-up port of make-up extraction condensing steam turbine by make-up pipeline;The system drives generator to generate electricity by make-up extraction condensing steam turbine through main steam and low-pressure saturated steam, without using parameter reduction device to reduce parameter, so as to reduce energy waste and improve overall thermal efficiency. And by setting adjustable adjustable medium-pressure steam extraction port, the extraction amount of medium-temperature medium-pressure steam can be adjusted according to the needs of chemical production section in factory area.

Description

Technical Field

[0001] This utility model belongs to the technical field of dry quenching coke power generation system, specifically relating to a dry quenching coke power generation system that combines multi-parameter steam power generation with steam extraction. Background Technology

[0002] Coking products are one of the main raw materials required for the production of industries such as steel. With the continuous improvement of my country's requirements for energy conservation and emission reduction in the coking industry, dry quenching technology has been widely promoted due to its ability to efficiently recover waste heat. Under the multiple requirements of energy conservation, emission reduction and dual carbon targets, coking plants have begun to focus on the utilization of waste heat in the coking system, and have adopted waste heat recovery devices such as coke oven flue gas waste heat recovery devices, coke oven riser pipe waste heat recovery devices or other waste heat recovery and utilization devices to recover waste heat in the coking system.

[0003] Patent application number 202221549350.X discloses a system for supplying heating water to generate electricity from waste heat from dry quenching coke ovens. The system includes a pure condensing steam turbine generator set, a condenser for the pure condensing steam turbine generator set, a bypass condenser, a heating network heater, an extraction condensing steam turbine generator set, and a condenser for the extraction condensing steam turbine generator set, all connected sequentially via pipelines. A third standby desuperheating and pressure-reducing device is connected at one end to a high-parameter steam pipeline and at the other end to a pipeline connecting the heating network heater and the extraction condensing steam turbine generator set. First and second standby desuperheating and pressure-reducing devices are connected at one end to a high-parameter steam pipeline and at the other end to a bypass condenser pipeline. The outlet of the heating network heater is connected to a heating equipment pipeline, and the heating equipment is connected to the inlet pipeline of the condenser for the pure condensing steam turbine generator set, with a branch pipeline connected to the inlet of the bypass condenser.

[0004] Patent application number 202123392135.1 discloses a dry quenching system and a dry quenching power generation reheat system, including a waste heat boiler, a heat exchanger, a steam turbine, and a bypass system. The heat exchanger includes a superheater and a reheater, and the steam turbine includes a high-pressure cylinder and a low-pressure cylinder. The superheater is connected to the high-pressure cylinder, the high-pressure cylinder is connected to the reheater, and the reheater is connected to the low-pressure cylinder. The bypass system includes a first desuperheating and pressure reducing device and a second desuperheating and pressure reducing device. The steam inlet of the first desuperheating and pressure reducing device is connected to the pipeline between the superheater and the high-pressure cylinder, and the steam outlet of the first desuperheating and pressure reducing device is connected to the pipeline between the high-pressure cylinder and the reheater. The steam inlet of the second desuperheating and pressure reducing device is connected to the pipeline between the reheater and the low-pressure cylinder.

[0005] Currently, in traditional dry quenching coke power generation systems, the high-parameter main steam generated by the dry quenching coke boiler usually needs to be reduced to medium temperature and medium pressure by a desuperheating and pressure reducing device before it can be supplied to the chemical production section of the plant. This method is prone to problems such as a decline in thermal energy quality and energy waste. Utility Model Content

[0006] Based on the aforementioned technical problems, the purpose of this utility model is to provide a dry quenching coke power generation system that combines multi-parameter steam power generation with extraction steam. This system uses main steam and low-pressure saturated steam to drive a generator through a condensing steam turbine, eliminating the need for over-cooling and pressure-reducing devices to lower parameters, thereby reducing energy waste and improving overall thermal efficiency. Furthermore, by setting an adjustable medium-pressure steam extraction port, the extraction rate of medium-temperature and medium-pressure steam can be adjusted according to the needs of the chemical production sections within the plant.

[0007] The specific technical solution is as follows:

[0008] A dry quenching coke power generation system utilizing multi-parameter steam combined with extraction steam includes: a dry quenching coke boiler, a waste heat boiler, a steam-assisted extraction condensing turbine, a generator, an adjustable medium-pressure steam extraction port, a low-pressure steam-assisted regulating valve, and a steam-water separator. The main steam produced by the dry quenching coke boiler is introduced into the main steam port of the steam-assisted extraction condensing turbine via a main steam pipeline. The low-pressure saturated steam produced by the waste heat boiler is introduced into the steam-assisted extraction condensing turbine's injection port via a steam-assisted pipeline. The generator is connected to the output end of the steam-assisted extraction condensing turbine. The steam-assisted extraction condensing turbine is equipped with an adjustable medium-pressure steam extraction port, which transports medium-temperature, medium-pressure steam to the chemical production section of the plant via an extraction pipeline. The low-pressure steam-assisted regulating valve is located at the steam-assisted extraction condensing turbine's injection port. The steam-water separator is installed on the steam-assisted pipeline to separate moisture from the low-pressure saturated steam.

[0009] In addition, the dry quenching power generation system that combines multi-parameter steam power generation and steam extraction in the above-mentioned technical solution provided by this utility model may also have the following additional technical features:

[0010] In the above technical solution, the main steam pipeline is equipped with a main steam speed shut-off valve and a high-pressure regulating valve.

[0011] In the above technical solution, a low-pressure steam replenishment quick-closing valve is installed on the steam replenishment pipeline.

[0012] In the above technical solution, the steam extraction condensing turbine is equipped with an exhaust port, and the exhaust port is connected to the condenser.

[0013] The above technical solution also includes: a low-pressure steam connection pipe, which is connected to a make-up steam pipe to deliver low-pressure steam to low-pressure heat users.

[0014] In the above technical solution, a medium-pressure extraction steam quick-closing valve is installed on the extraction steam pipeline.

[0015] This utility model discloses a dry quenching coke power generation system that combines multi-parameter steam power generation with steam extraction. Compared with existing technologies, the advantages are as follows:

[0016] 1. By using a steam extraction condensing turbine to collect high-parameter main steam from the dry quenching coke boiler and low-pressure saturated steam from the waste heat boiler to jointly drive a generator to generate electricity, the high-parameter steam is avoided from being used after being de-temperatured and depressurized, thereby reducing energy waste and improving overall thermal efficiency.

[0017] 2. To fully utilize the supplementary steam, a low-pressure supplementary steam regulating valve is installed before the supplementary steam extraction condensing turbine. When the pressure of the low-pressure saturated steam input to the supplementary steam extraction condensing turbine is high, the low-pressure supplementary steam regulating valve is opened wider, allowing more low-pressure saturated steam to enter the supplementary steam extraction condensing turbine, increasing power generation. When the pressure of the low-pressure saturated steam input to the supplementary steam extraction condensing turbine is low, the flow rate of the low-pressure supplementary steam regulating valve is reduced to maintain the inlet steam pressure of the supplementary steam extraction condensing turbine, reducing power generation and ensuring stable turbine operation.

[0018] 3. By setting an adjustable medium-pressure steam extraction port, the extraction volume of medium-temperature and medium-pressure steam can be adjusted according to the needs of the chemical production section in the plant.

[0019] 4. By installing a steam-water separator in the make-up steam pipeline, moisture in the low-pressure saturated steam is separated, thereby ensuring that the dryness of the make-up steam meets the requirements of the make-up steam extraction condensing turbine, and thus ensuring the stable operation of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a dry quenching coke power generation system that utilizes a combination of multi-parameter steam power generation and steam extraction according to this utility model.

[0021] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0022] 10. Dry quenching coke boiler, 11. Waste heat boiler, 12. Steam extraction condensing turbine, 13. Generator, 14. Low-pressure steam injection regulating valve, 15. Steam-water separator, 16. Main steam pipeline, 17. Steam injection pipeline, 18. Steam extraction pipeline, 19. Chemical production section of the plant area, 20. Medium-pressure steam extraction quick-closing valve, 21. Main steam quick-closing valve, 22. High-pressure regulating valve, 23. Low-pressure steam injection quick-closing valve, 24. Condenser, 25. Low-pressure steam connection pipe, 26. Low-pressure heat user. Detailed Implementation

[0023] The following are specific implementation cases and appendices. Figure 1 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0024] A dry quenching coke power generation system that combines multi-parameter steam power generation with steam extraction, such as... Figure 1As shown, it includes: a dry quenching coke boiler 10, a waste heat boiler 11, a steam extraction condensing turbine 12, a generator 13, an adjustable medium-pressure steam extraction port, a low-pressure steam injection regulating valve 14, and a steam-water separator 15; the main steam produced by the dry quenching coke boiler 10 is introduced into the main steam port of the steam extraction condensing turbine 12 through the main steam pipeline 16, and the low-pressure saturated steam produced by the waste heat boiler 11 is introduced into the steam injection port of the steam extraction condensing turbine 12 through the steam injection pipeline 17, and the generator 13 and the steam extraction... The output end of the condensing steam turbine 12 is connected; the steam extraction condensing steam turbine 12 is equipped with an adjustable medium-pressure steam extraction port, which transports medium-temperature and medium-pressure steam to the chemical production section 19 of the plant through the extraction steam pipeline 18, and the extraction steam pipeline 18 is equipped with a medium-pressure extraction steam quick-closing valve 20; the low-pressure steam injection regulating valve 14 is set at the steam injection port of the steam extraction condensing steam turbine 12; the steam-water separator 15 is set on the steam injection pipeline 17 and is used to separate the water in the low-pressure saturated steam.

[0025] With the above structure, the high-parameter main steam generated by the dry quenching coke boiler 10 is introduced into the main steam port of the steam extraction condensing turbine 12 through the steam pipeline, and the low-pressure saturated steam produced by the waste heat boiler 11 is introduced into the steam injection port of the steam extraction condensing turbine 12 through the steam injection pipeline 17, and the generator 13 is driven by the steam extraction condensing turbine 12 to generate electricity. This avoids the high-parameter steam from being used with reduced parameters through the desuperheating and pressure reducing device, thereby reducing energy waste and improving overall thermal efficiency. To fully utilize the supplementary steam, a low-pressure supplementary steam regulating valve 14 is installed before the supplementary steam extraction condensing turbine 12. When the pressure of the low-pressure saturated steam entering the supplementary steam extraction condensing turbine 12 is high, the low-pressure supplementary steam regulating valve 14 is opened wider, allowing more low-pressure saturated steam to enter the supplementary steam extraction condensing turbine 12, thereby increasing power generation. When the pressure of the low-pressure saturated steam entering the supplementary steam extraction condensing turbine 12 is low, the flow rate of the low-pressure supplementary steam regulating valve 14 is reduced to maintain the inlet steam pressure of the supplementary steam extraction condensing turbine 12, thereby reducing power generation and ensuring stable turbine operation.

[0026] By setting an adjustable medium-pressure steam extraction port, the extraction volume of medium-temperature and medium-pressure steam can be adjusted according to the needs of the chemical production section in the plant.

[0027] Specifically, by installing a pressure sensor on the make-up steam pipeline 17, the pressure of the low-pressure saturated steam in the make-up steam pipeline 17 is monitored. When the make-up steam pressure is detected to be higher than the set threshold, the control system controls the low-pressure make-up steam regulating valve 14 to automatically increase the opening, allowing more low-pressure steam to enter the make-up steam extraction condensing turbine 12 and increase power generation. When the make-up steam pressure is detected to be lower than the set threshold, the control system controls the low-pressure make-up steam regulating valve 14 to automatically decrease the opening, maintaining the stability of the pressure of the low-pressure make-up steam regulating valve 14.

[0028] By installing the steam-water separator 15 on the make-up steam pipeline 17, the moisture in the low-pressure saturated steam is separated to ensure that the steam dryness meets the requirements of the make-up steam extraction condensing turbine 12, thereby ensuring the safe and stable operation of the system.

[0029] In an embodiment of this utility model, the main steam pipeline 16 is provided with a main steam speed shut-off valve 21 and a high-pressure regulating valve 22.

[0030] The pressure of the main steam is regulated by the high-pressure regulating valve 22 to keep the pressure of the main steam always stable; the main steam quick-closing valve 21 is used to ensure the safe operation of the system. When the auxiliary steam extraction condensing turbine 12 fails or an emergency occurs in the system, the main steam supply can be quickly shut off through the main steam quick-closing valve 21, thereby ensuring the safety of the auxiliary steam extraction condensing turbine 12 and the system.

[0031] In an embodiment of this utility model, a low-pressure steam replenishment quick-closing valve 23 is provided on the steam replenishment pipeline 17.

[0032] When the steam extraction condensing turbine 12 malfunctions or an emergency occurs in the system, the supply of low-pressure saturated steam can be quickly shut off through the low-pressure steam extraction quick-closing valve 23, thereby ensuring the safety of the steam extraction condensing turbine 12 and the system.

[0033] In an embodiment of this utility model, the steam turbine 12 with steam extraction is provided with a steam exhaust port, and the steam exhaust port is connected to the condenser 24.

[0034] The exhaust steam discharged from the steam extraction condensing turbine 12 is condensed into liquid water by the condenser 24, and the condensed water is sent back to the boiler system by the condensate pump, so as to realize the recycling of water resources.

[0035] In an embodiment of this utility model, it further includes: a low-pressure steam connection pipe 25, which is connected to the steam replenishment pipe 17 to transport low-pressure steam to the low-pressure heat user 26.

[0036] A portion of the low-pressure saturated steam is transported to the low-pressure heat user 26 via the low-pressure steam connection pipe 25 to meet the user's needs.

[0037] In an embodiment of this utility model, a medium-pressure extraction steam quick-closing valve 20 is provided on the extraction steam pipeline 18.

[0038] By installing a medium-pressure extraction steam quick-closing valve 20 on the extraction steam pipeline 18, this valve can be quickly closed when the chemical production section or the auxiliary steam extraction condensing turbine 12 in the plant fails, thus ensuring the safety of the auxiliary steam extraction condensing turbine 12.

[0039] Implementation process: The high-parameter main steam generated by the dry quenching coke boiler 10 is introduced into the main steam port of the steam extraction condensing turbine 12 through the steam pipeline. The low-pressure saturated steam produced by the waste heat boiler 11 is introduced into the steam injection port of the steam extraction condensing turbine 12 through the steam injection pipeline 17, and the generator 13 is driven by the steam extraction condensing turbine 12 to generate electricity. This avoids the high-parameter steam from being used after being de-cooled and depressurized, thereby reducing energy waste and improving overall thermal efficiency. To fully utilize the supplementary steam, a low-pressure supplementary steam regulating valve 14 is installed before the supplementary steam extraction condensing turbine 12. When the pressure of the low-pressure saturated steam entering the supplementary steam extraction condensing turbine 12 is high, the low-pressure supplementary steam regulating valve 14 is opened wider, allowing more low-pressure saturated steam to enter the supplementary steam extraction condensing turbine 12, thereby increasing power generation. When the pressure of the low-pressure saturated steam entering the supplementary steam extraction condensing turbine 12 is low, the flow rate of the low-pressure supplementary steam regulating valve 14 is reduced to maintain the inlet steam pressure of the supplementary steam extraction condensing turbine 12, thereby reducing power generation and ensuring stable turbine operation.

[0040] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dry quenching coke power generation system that combines multi-parameter steam power generation with steam extraction, characterized in that, include: Dry quenching coke boiler, waste heat boiler, steam extraction condensing steam turbine, generator, adjustable medium-pressure steam extraction port, low-pressure steam injection regulating valve and steam-water separator; The main steam produced by the dry quenching coke boiler is introduced into the main steam port of the steam extraction condensing turbine through the main steam pipeline, and the low-pressure saturated steam produced by the waste heat boiler is introduced into the steam injection port of the steam extraction condensing turbine through the steam injection pipeline. The generator is connected to the output end of the steam extraction condensing turbine. The steam turbine with steam extraction is equipped with an adjustable medium-pressure steam extraction port, which transports medium-temperature and medium-pressure steam to the chemical production section of the plant through the steam extraction pipeline. The low-pressure steam injection regulating valve is installed at the steam injection port of the steam injection extraction condensing turbine. The steam-water separator is installed on the make-up steam pipeline and is used to separate moisture from low-pressure saturated steam.

2. The dry quenching power generation system utilizing multi-parameter steam co-generation and extraction steam combined as described in claim 1, characterized in that, The main steam pipeline is equipped with a main steam speed shut-off valve and a high-pressure regulating valve.

3. The dry quenching power generation system utilizing multi-parameter steam co-generation and extraction steam combined as described in claim 1, characterized in that, The steam replenishment pipeline is equipped with a low-pressure steam replenishment quick-closing valve.

4. The dry quenching power generation system utilizing multi-parameter steam co-generation and extraction steam combined as described in claim 1, characterized in that, The steam extraction condensing turbine is equipped with an exhaust port, which is connected to the condenser.

5. A dry quenching power generation system utilizing multi-parameter steam co-generation and extraction steam combined, as described in claim 1, is characterized in that... Also includes: A low-pressure steam connection pipe is connected to the steam replenishment pipe to deliver low-pressure steam to low-pressure heat users.

6. A dry quenching power generation system utilizing multi-parameter steam co-generation and extraction steam combined, as described in claim 1, is characterized in that... The extraction steam pipeline is equipped with a medium-pressure extraction steam quick-closing valve.

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