An ultra-high temperature and ultra-high pressure reheat dry quenching waste heat power generation system and process

Abstract

The present invention relates to an ultra-high temperature and ultra-high pressure reheating dry coke quenching waste heat power generation system and process, the system comprises an ultra-high temperature and ultra-high pressure dry coke quenching boiler, an ultra-high temperature and ultra-high pressure steam turbine generator set, a multi-stage temperature reduction and pressure reduction device and a condenser; the ultra-high temperature and ultra-high pressure dry coke quenching boiler is composed of a dry coke quenching boiler steam drum, a primary superheater, a secondary superheater, a primary reheater and a secondary reheater, the ultra-high temperature and ultra-high pressure steam turbine generator set is composed of a high pressure cylinder, a medium and low pressure cylinder and a steam turbine generator; the multi-stage temperature reduction and pressure reduction device is composed of a first-stage to a fifth-stage temperature reduction and pressure reduction device; the present invention achieves a major breakthrough in the dry coke quenching waste heat power generation technology of the ultra-high temperature and ultra-high pressure dry coke quenching boiler supporting the ultra-high temperature and ultra-high pressure steam turbine generator set, can effectively prevent the reheater from dry burning, protect the reheater, and at the same time can maximize the dry coke quenching waste heat power generation, create good economic benefits, and reduce the energy consumption per ton of coke of the enterprise.

Description

Technical Field

[0001] The present invention relates to the technical field of coke quenching waste heat power generation, and in particular to an ultra-high temperature and ultra-high pressure reheat dry quenching waste heat power generation system and process. Background Art

[0002] At present, coking enterprises usually use high-temperature and high-pressure dry coke quenching boilers with high-temperature and high-pressure steam turbine generator sets to generate power from waste heat from dry coke quenching, and many of them have been put into production. However, there is no record of the dry coke quenching waste heat power generation technology that uses ultra-high temperature and ultra-high pressure dry coke quenching boilers with ultra-high temperature and ultra-high pressure steam turbine generator sets. With the breakthrough of large-volume coke oven technology, the trend of large-scale and centralized coking enterprises has become more and more obvious. At the same time, the dry coke quenching waste heat power generation technology has been continuously improved, and the equipment manufacturing level has been continuously improved. The dry coke quenching ultra-high temperature and ultra-high pressure power generation technology is in urgent need of development, so as to further accelerate the transformation and upgrading of the coking industry, promote technological progress in the coking industry, improve the comprehensive utilization rate of resources and energy conservation and environmental protection levels, and promote high-quality development of the coking industry. Summary of the invention

[0003] The present invention provides an ultra-high temperature and ultra-high pressure reheating CDQ waste heat power generation system and process, achieving a major breakthrough in the CDQ waste heat power generation technology of an ultra-high temperature and ultra-high pressure CDQ boiler equipped with an ultra-high temperature and ultra-high pressure steam turbine generator set, which can effectively prevent the reheater from dry burning and protect the reheater, while maximizing the CDQ waste heat power generation, creating good economic benefits and reducing the enterprise's energy consumption per ton of coke.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation system, comprising an ultra-high temperature and ultra-high pressure dry quenching boiler, an ultra-high temperature and ultra-high pressure steam turbine generator set, a multi-stage temperature reduction and pressure reduction device and a condenser; the ultra-high temperature and ultra-high pressure dry quenching boiler is composed of a dry quenching boiler drum, a primary superheater, a secondary superheater, a primary reheater, and a secondary reheater; the ultra-high temperature and ultra-high pressure steam turbine generator set is composed of a high pressure cylinder, a medium and low pressure cylinder, and a steam turbine generator; the multi-stage temperature reduction and pressure reduction device is composed of a first-stage to a fifth-stage temperature reduction and pressure reduction device;

[0006] The saturated steam outlet of the dry coke quenching boiler drum is connected to the primary superheater through a manifold, the primary superheater is connected to the secondary superheater through a superheated steam spray water desuperheater, and the superheated steam outlet of the secondary superheater is connected to the high-pressure cylinder through a superheated steam pipeline; the exhaust port of the high-pressure cylinder is connected to the primary reheater through a high-pressure steam bypass pipeline, the primary reheater is connected to the secondary reheater through a reheated steam spray water desuperheater, and the reheated steam outlet of the secondary reheater is connected to the medium and low pressure cylinders through a reheated steam pipeline; the medium and low pressure cylinders are connected to the condenser through a low pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the high pressure steam bypass pipeline is connected to the condenser through a low pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the high pressure steam bypass pipeline is connected to the condenser through a high ... condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to The pipelines are connected through a connecting pipeline one, and a first-stage cooling and pressure reducing device is arranged on the connecting pipeline one; the reheat steam pipeline is connected to the condenser through a connecting pipeline two, and a second-stage cooling and pressure reducing device is arranged on the connecting pipeline two; the superheated steam pipeline is connected to an external medium-pressure steam network through an external medium-pressure steam pipeline, and a fourth-stage cooling and pressure reducing device is arranged on the external medium-pressure steam pipeline one, and a medium-pressure steam outlet is arranged in the high-pressure cylinder to connect to an external medium-pressure steam pipeline downstream of the fourth-stage cooling and pressure reducing device; the connecting pipeline two is connected to an external low-pressure steam network through an external low-pressure steam pipeline, and a low-pressure steam outlet is arranged in the medium and low-pressure cylinders to connect to an external low-pressure steam pipeline downstream of the fifth-stage cooling and pressure reducing device.

[0007] The rated steam temperature of the ultra-high temperature and ultra-high pressure CDQ boiler is 570° C., and the rated steam pressure is 13.7 MPa.

[0008] The rated steam temperature of the ultra-high temperature and ultra-high pressure steam turbine generator set is 570°C, the rated steam pressure is 13.2MPa, the rated exhaust temperature of the high-pressure cylinder is 350°C, and the rated exhaust pressure is 3.1MPa.

[0009] An ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation process comprises the following steps:

[0010] 1) The saturated steam generated by the drum of the CDQ boiler enters the primary superheater through the manifold, exchanges heat with the high-temperature inert circulating gas in the primary superheater to increase the steam temperature, and then passes through the hot steam water spray desuperheater to adjust the steam temperature to the set temperature, and then enters the secondary superheater to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa all enters the high-pressure cylinder of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity, and the high-pressure cylinder exhaust steam with a temperature of less than 350°C and a pressure of less than 3.1MPa after work is sent to the primary reheater of the ultra-high temperature and ultra-high pressure CDQ boiler, exchanges heat with the high-temperature inert circulating gas to increase the steam temperature, and then passes through the reheat steam water spray desuperheater to adjust the steam temperature to the set temperature, and then enters the secondary reheater to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the reheated steam with a temperature of more than 570°C and a pressure of more than 2.8MPa all enters the medium and low pressure cylinders of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity;

[0011] 2) When the ultra-high temperature and ultra-high pressure steam turbine generator set is started or under load shedding conditions, the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa is sent to the primary reheater after being reduced to a temperature of less than 350°C and a pressure of less than 3.1MPa by the primary temperature reduction and pressure reduction device, and then heat-exchanged with the high-temperature inert circulating gas to raise the temperature. The steam temperature is then adjusted to the set temperature by the reheated steam water spray desuperheater, and then enters the secondary reheater, and heat-exchanged with the high-temperature inert circulating gas to raise the temperature. The reheated steam with a final temperature of more than 570°C and a pressure of more than 2.8MPa is reduced to a temperature of less than 190°C and a pressure of less than 0.8MPa by the secondary temperature reduction and pressure reduction device connected in series, and then enters the third temperature reduction and pressure reduction device arranged on the condenser, and the steam reduced to a temperature of less than 60°C and a pressure of less than 0.02MPa enters the condenser to recover the working fluid;

[0012] In the step 1), the exhaust steam after power generation enters the condenser; the high-pressure cylinder simultaneously extracts medium-pressure steam and merges it into the medium-pressure steam network for use by medium-pressure steam users, and the medium and low-pressure cylinders simultaneously extract low-pressure steam and merge it into the low-pressure steam network for use by low-pressure steam users.

[0013] In the step 2), the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7 MPa is simultaneously cooled and decompressed by a four-stage cooling and decompression device and then incorporated into the medium-pressure steam network for use by medium-pressure steam users; or is cooled to a temperature of less than 190°C and a pressure of less than 0.8 MPa by a two-stage cooling and decompression device, and then cooled and decompressed by a five-stage cooling and decompression device and then incorporated into the low-pressure steam network for use by low-pressure steam users.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) Use ultra-high temperature and ultra-high pressure steam turbine generator sets to generate electricity, maximize the utilization rate of waste heat, reduce the energy consumption per ton of coke in the enterprise, and achieve significant energy-saving and consumption-reducing effects;

[0016] 2) The ultra-high temperature and ultra-high pressure steam turbine generator set is used to generate electricity, which increases the power generation by about 7% compared with the traditional high temperature and high pressure steam turbine generator set, with significant economic benefits;

[0017] 3) By setting up a high-pressure steam bypass system, when the generator set is started or under load shedding conditions, the main steam enters the reheater after being cooled and decompressed, effectively preventing the reheater from burning dry and achieving the purpose of protecting the reheater; at the same time, the main steam can also be sent to the external medium-pressure steam network after being cooled and decompressed to meet the gas demand of medium-pressure steam users, so that the boiler will not be shut down and the gas supply will not be interrupted;

[0018] 4) By setting up a low-pressure steam bypass system, when the generator set is started or under load shedding conditions, the reheated steam enters the condenser after being cooled and reduced in pressure, effectively preventing energy waste caused by the release of the main steam, and recovering the desalted water working fluid; at the same time, the reheated steam can also be sent to the external low-pressure steam pipeline after being cooled and reduced in pressure to meet the gas demand of low-pressure steam users, so that the boiler can be shut down without stopping and the gas supply can be uninterrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an ultra-high temperature and ultra-high pressure reheat dry quenching waste heat power generation system described in the present invention.

[0020] In the figure: 1. Coke dry quenching boiler drum 2. Primary superheater 3. Superheated steam spray desuperheater 4. Secondary superheater 5. High-pressure cylinder 6. Primary reheater 7. Reheated steam spray desuperheater 8. Secondary reheater 9. Medium and low-pressure cylinders 10. Condenser 11. Primary temperature and pressure reduction device 12. Secondary temperature and pressure reduction device 13. Third-stage temperature and pressure reduction device 14. Fourth-stage temperature and pressure reduction device 15. Fifth-stage temperature and pressure reduction device 16. Steam turbine generator DETAILED DESCRIPTION

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] like Figure 1 As shown, the ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation system of the present invention comprises an ultra-high temperature and ultra-high pressure dry quenching boiler, an ultra-high temperature and ultra-high pressure steam turbine generator set, a multi-stage temperature reduction and pressure reduction device and a condenser 10; the ultra-high temperature and ultra-high pressure dry quenching boiler is composed of a dry quenching boiler drum 1, a primary superheater 2, a secondary superheater 4, a primary reheater 6, and a secondary reheater 8; the ultra-high temperature and ultra-high pressure steam turbine generator set is composed of a high pressure cylinder 5, a medium and low pressure cylinder 9, and a steam turbine generator 16; the multi-stage temperature reduction and pressure reduction device is composed of one to five stages of temperature reduction and pressure reduction devices 11, 12, 13, 14, and 15;

[0023] The saturated steam outlet of the dry coke quenching boiler drum 1 is connected to the primary superheater 2 through a manifold, the primary superheater 2 is connected to the secondary superheater 4 through a superheated steam spray desuperheater 3, the superheated steam outlet of the secondary superheater 4 is connected to the high-pressure cylinder 5 through a superheated steam pipeline; the exhaust port of the high-pressure cylinder 5 is connected to the primary reheater 6 through a high-pressure steam bypass pipeline, the primary reheater 6 is connected to the secondary reheater 8 through a reheated steam spray desuperheater 7, and the reheated steam outlet of the secondary reheater 8 is connected to the medium- and low-pressure cylinders 9 through reheated steam pipelines; the medium- and low-pressure cylinders 9 are connected to the condenser 10 through a low-pressure steam bypass pipeline, and the condenser 10 is provided with a three-stage temperature and pressure reduction device 13; the superheated steam pipeline is connected to the high-pressure The steam bypass pipeline is connected through a connecting pipeline one, and a first-stage cooling and pressure reducing device 11 is provided on the connecting pipeline one; the reheat steam pipeline is connected to the condenser 10 through a connecting pipeline two, and a second-stage cooling and pressure reducing device 12 is provided on the connecting pipeline two; the superheated steam pipeline is connected to an external medium-pressure steam network through an external medium-pressure steam pipeline, and a fourth-stage cooling and pressure reducing device 14 is provided on the external medium-pressure steam pipeline, and a medium-pressure steam outlet is provided in the high-pressure cylinder 5 to connect to an external medium-pressure steam pipeline downstream of the fourth-stage cooling and pressure reducing device 14; the connecting pipeline two is connected to an external low-pressure steam network through an external low-pressure steam pipeline, and a low-pressure steam outlet is provided in the medium- and low-pressure cylinders 9 to connect to an external low-pressure steam pipeline downstream of the fifth-stage cooling and pressure reducing device 15.

[0024] The rated steam temperature of the ultra-high temperature and ultra-high pressure CDQ boiler is 570° C., and the rated steam pressure is 13.7 MPa.

[0025] The rated steam temperature of the ultra-high temperature and ultra-high pressure steam turbine generator set is 570°C, the rated steam pressure is 13.2MPa, the rated exhaust temperature of the high-pressure cylinder is 350°C, and the rated exhaust pressure is 3.1MPa.

[0026] An ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation process comprises the following steps:

[0027] 1) The saturated steam generated by the drum 1 of the CDQ boiler enters the primary superheater 2 through the manifold, exchanges heat with the high-temperature inert circulating gas in the primary superheater 2 to increase the steam temperature, and then passes through the hot steam water spray desuperheater 3 to adjust the steam temperature to the set temperature, and then enters the secondary superheater 4 to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa all enters the high-pressure cylinder 5 of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity, and the high-pressure cylinder exhaust steam with a temperature of less than 350°C and a pressure of less than 3.1MPa after work is sent to the primary reheater 6 of the ultra-high temperature and ultra-high pressure CDQ boiler, exchanges heat with the high-temperature inert circulating gas to increase the steam temperature, and then passes through the reheat steam water spray desuperheater 7 to adjust the steam temperature to the set temperature, and then enters the secondary reheater 8 to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the reheated steam with a temperature of more than 570°C and a pressure of more than 2.8MPa all enters the medium and low pressure cylinders 9 of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity;

[0028] 2) When the ultra-high temperature and ultra-high pressure steam turbine generator set is started or under load shedding conditions, the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa is sent to the primary reheater 6 after being reduced to a temperature of less than 350°C and a pressure of less than 3.1MPa by the primary temperature reduction and pressure reduction device 11, and then the steam is heated by heat exchange with the high temperature inert circulating gas to increase the temperature. After that, the steam temperature is adjusted to the set temperature by the reheated steam water spray desuperheater 7, and then the steam enters the secondary reheater 8, and the steam is heated by heat exchange with the high temperature inert circulating gas to increase the temperature. The reheated steam with a final temperature of more than 570°C and a pressure of more than 2.8MPa is passed through the secondary temperature reduction and pressure reduction device 12 connected in series, and the temperature is reduced to less than 190°C and the pressure is less than 0.8MPa, and then the steam enters the third temperature reduction and pressure reduction device 13 arranged on the condenser 10, and the steam with a temperature of less than 60°C and a pressure of less than 0.02MPa enters the condenser 10 to recover the working fluid;

[0029] In the step 1), the exhaust steam after power generation enters the condenser 10; the high-pressure cylinder 5 simultaneously extracts medium-pressure steam and merges it into the medium-pressure steam network for use by medium-pressure steam users, and the medium- and low-pressure cylinders 9 simultaneously extract low-pressure steam and merge it into the low-pressure steam network for use by low-pressure steam users.

[0030] In the step 2), the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7 MPa is simultaneously cooled and decompressed by a four-stage cooling and decompression device 14 and then incorporated into the medium-pressure steam network for use by medium-pressure steam users; or is cooled to a temperature below 190°C and a pressure below 0.8 MPa by a two-stage cooling and decompression device 12, and then cooled and decompressed by a five-stage cooling and decompression device 15 and then incorporated into the low-pressure steam network for use by low-pressure steam users.

[0031] The ultra-high temperature and ultra-high pressure steam turbine generator set is an ultra-high temperature and ultra-high pressure coaxial steam turbine generator set with single reheat. The ultra-high temperature and ultra-high pressure dry quenching boiler is also equipped with an economizer, a membrane water-cooled wall and an evaporator, etc., which are all conventional settings and will not be elaborated in detail here.

[0032] The superheated steam generated by the ultra-high temperature and ultra-high pressure dry quenching boiler of the present invention can be supplied to the medium-pressure steam user through the high-pressure bypass, or can be supplied to the condenser through the low-pressure bypass in series. The reheated steam generated by the ultra-high temperature and ultra-high pressure dry quenching boiler can be supplied to the condenser through the low-pressure bypass, or can be supplied to the low-pressure steam user after being reduced in temperature and pressure. Both the high-pressure bypass and the low-pressure bypass are at full load capacity.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-high temperature and ultra-high pressure reheat dry quenching waste heat power generation system, characterized in that: It includes an ultra-high temperature and ultra-high pressure dry quenching coke boiler, an ultra-high temperature and ultra-high pressure steam turbine generator set, a multi-stage temperature reduction and pressure reduction device and a condenser; the ultra-high temperature and ultra-high pressure dry quenching coke boiler is composed of a dry quenching coke boiler drum, a primary superheater, a secondary superheater, a primary reheater and a secondary reheater, and the rated steam temperature of the ultra-high temperature and ultra-high pressure dry quenching coke boiler is 570°C and the rated steam pressure is 13.7MPa; the ultra-high temperature and ultra-high pressure steam turbine generator set is composed of a high-pressure cylinder, a medium- and low-pressure cylinder, and a steam turbine generator; the rated steam temperature of the ultra-high temperature and ultra-high pressure steam turbine generator set is 570°C and the rated steam pressure is 13.2MPa, the rated exhaust temperature of the high-pressure cylinder is 350°C, and the rated exhaust pressure is 3.1MPa; the multi-stage temperature reduction and pressure reduction device is composed of a first-stage to a fifth-stage temperature reduction and pressure reduction device; The saturated steam outlet of the dry coke quenching boiler drum is connected to the primary superheater through a manifold, the primary superheater is connected to the secondary superheater through a superheated steam spray water desuperheater, and the superheated steam outlet of the secondary superheater is connected to the high-pressure cylinder through a superheated steam pipeline; the exhaust port of the high-pressure cylinder is connected to the primary reheater through a high-pressure steam bypass pipeline, the primary reheater is connected to the secondary reheater through a reheated steam spray water desuperheater, and the reheated steam outlet of the secondary reheater is connected to the medium and low pressure cylinders through a reheated steam pipeline; the medium and low pressure cylinders are connected to the condenser through a low pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the high pressure steam bypass pipeline is connected to the condenser through a low pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the high pressure steam bypass pipeline is connected to the condenser through a high ... condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to the high pressure steam bypass pipeline, and the condenser is provided with a three-stage temperature and pressure reduction device; the superheated steam pipeline is connected to The pipelines are connected through a connecting pipeline one, and a first-stage cooling and pressure reducing device is arranged on the connecting pipeline one; the reheat steam pipeline is connected to the condenser through a connecting pipeline two, and a second-stage cooling and pressure reducing device is arranged on the connecting pipeline two; the superheated steam pipeline is connected to an external medium-pressure steam network through an external medium-pressure steam pipeline, and a fourth-stage cooling and pressure reducing device is arranged on the external medium-pressure steam pipeline one, and a medium-pressure steam outlet is arranged in the high-pressure cylinder to connect to an external medium-pressure steam pipeline downstream of the fourth-stage cooling and pressure reducing device; the connecting pipeline two is connected to an external low-pressure steam network through an external low-pressure steam pipeline, and a low-pressure steam outlet is arranged in the medium and low-pressure cylinders to connect to an external low-pressure steam pipeline downstream of the fifth-stage cooling and pressure reducing device.

2. An ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation process based on the system of claim 1, characterized in that: The steps include: 1) The saturated steam generated by the drum of the CDQ boiler enters the primary superheater through the manifold, exchanges heat with the high-temperature inert circulating gas in the primary superheater to increase the steam temperature, and then passes through the hot steam water spray desuperheater to adjust the steam temperature to the set temperature, and then enters the secondary superheater to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa all enters the high-pressure cylinder of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity, and the high-pressure cylinder exhaust steam with a temperature of less than 350°C and a pressure of less than 3.1MPa after work is sent to the primary reheater of the ultra-high temperature and ultra-high pressure CDQ boiler, exchanges heat with the high-temperature inert circulating gas to increase the steam temperature, and then passes through the reheat steam water spray desuperheater to adjust the steam temperature to the set temperature, and then enters the secondary reheater to exchange heat with the high-temperature inert circulating gas to increase the temperature, and finally the reheated steam with a temperature of more than 570°C and a pressure of more than 2.8MPa all enters the medium and low pressure cylinders of the ultra-high temperature and ultra-high pressure steam turbine generator set to generate electricity; 2) When the ultra-high temperature and ultra-high pressure steam turbine generator set is started or load-shedding, the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7MPa is reduced to a temperature below 350°C and a pressure below 3.1MPa through a first-stage temperature reduction and pressure reduction device, and then sent to a primary reheater to exchange heat with the high-temperature inert circulating gas to increase the temperature. The steam temperature is then adjusted to the set temperature through a reheat steam water spray desuperheater, and then enters a secondary reheater to exchange heat with the high-temperature inert circulating gas to increase the temperature. The reheated steam with a final temperature of more than 570°C and a pressure of more than 2.8MPa is reduced to a temperature below 190°C and a pressure below 0.8MPa through a second-stage temperature reduction and pressure reduction device in series, and then enters a third-stage temperature reduction and pressure reduction device installed on the condenser. The steam reduced to a temperature below 60°C and a pressure below 0.02MPa enters the condenser to recover the working fluid.

3. The ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation process according to claim 2, characterized in that: In the step 1), the exhaust steam after power generation enters the condenser; the high-pressure cylinder simultaneously extracts medium-pressure steam and merges it into the medium-pressure steam network for use by medium-pressure steam users, and the medium and low-pressure cylinders simultaneously extract low-pressure steam and merge it into the low-pressure steam network for use by low-pressure steam users.

4. The ultra-high temperature and ultra-high pressure reheating dry quenching waste heat power generation process according to claim 2, characterized in that: In the step 2), the superheated steam with a temperature of more than 570°C and a pressure of more than 13.7 MPa is simultaneously cooled and decompressed by a four-stage cooling and decompression device and then incorporated into the medium-pressure steam network for use by medium-pressure steam users; or is cooled to a temperature of less than 190°C and a pressure of less than 0.8 MPa by a two-stage cooling and decompression device, and then cooled and decompressed by a five-stage cooling and decompression device and then incorporated into the low-pressure steam network for use by low-pressure steam users.

Images