CN110345773A - A kind of copper metallurgy technique mesohigh saturated vapor power generation heating system - Google Patents

Abstract

The invention discloses a kind of copper metallurgy technique mesohigh saturated vapor power generation heating systems for being applied to copper smelting by pyrometallurgy field, the steam inlet is sequentially connected steam reducing valve, steam-water separator, heater and the first middle pressure steam turbine are pressed in first, and realize that the driving to the first generator generates electricity by the first reduction gear box, the main vapor outlet connection heating channel of first middle pressure steam turbine, the heating steam inlet of first low-pressure heater, the heating steam inlet of heater is pressed in the heating steam inlet of second low-pressure heater and second, first low-pressure heater, the main vapor outlet of heater is pressed to be separately connected the first low-pressure steam turbine in second low-pressure heater and second, the main vapour entrance of second low-pressure steam turbine and the second middle pressure steam turbine simultaneously drives the second generator by the second reduction gear box.This system ensure that the reasonable disposition of resource, reduces the corrosion and damage for operating structure in operational process, provides guarantee for the steady operation effect of system structure.

Description

A high-pressure saturated steam power generation and heating system in copper smelting process

technical field

The invention relates to a high-pressure saturated steam power generation and heating system in a copper smelting process applied in the field of pyrometallurgy.

Background technique

A large amount of saturated steam will be generated during the pyrometallurgy process. In order to avoid waste of resources, the steam is usually used for heating and power generation. However, the saturated steam generated during the pyrometallurgy process inevitably contains condensed water, and liquid droplets are easily precipitated during the expansion power generation process. Traditional axial-flow steam turbines are usually used in the process of steam power generation. This device has a large vibration, and at the same time increases the erosion effect of liquid droplets on the internal structure. At the same time, the use of high-pressure (especially greater than 2.00MPa(A)) saturated steam to directly generate electricity increases the structural requirements for power generation devices. Due to the difficulty in sealing the high-pressure shaft seal, more liquid water is precipitated from the steam during the expansion power generation process, which increases the Increased production costs. When steam extraction operation is required, the traditional axial flow turbine is often designed based on the original model, and the parameters are not freely customized, which reduces the application range of the device.

Contents of the invention

The technical problem solved by the invention is to provide a high-pressure saturated steam power generation and heating system in a copper smelting process that can effectively ensure the working stability.

The technical solution adopted by the present invention to solve its technical problems is:

A high-pressure saturated steam power generation heating system in a copper smelting process, including a steam inlet for communicating with the high-pressure copper smelting saturated steam, a steam pressure reducing valve, a steam-water separator, a heater, a steam turbine and a generator, the The heater includes a first low pressure heater, a second low pressure heater, a first medium pressure heater and a second medium pressure heater, and the steam turbine includes a first low pressure steam turbine, a second low pressure steam turbine machine, a first medium-pressure steam turbine, and a second medium-pressure steam turbine, the generator includes a first generator and a second generator, and the separation inlet of the steam-water separator communicates with the steam inlet, so The steam pressure reducing valve is arranged between the steam-water separator and the steam inlet, the separation outlet of the steam-water separator is connected to the main steam inlet of the first medium-pressure heater, and the main steam outlet of the first medium-pressure heater is connected to the second The main steam inlet of a medium-pressure steam turbine, the first medium-pressure steam turbine realizes the operation of driving the first generator to generate electricity through the first reduction gearbox, and the main steam inlet of the first medium-pressure steam turbine The steam outlet is connected to the heating channel and external heating equipment, and the main steam outlet is respectively connected to the first low-pressure heater, the heating steam inlet of the second low-pressure heater and the main steam inlet of the second medium-pressure heater through pipelines. The main steam outlets of the low pressure heater, the second low pressure heater and the second medium pressure heater are respectively connected to the main steam inlets of the first low pressure steam turbine, the second low pressure steam turbine and the second medium pressure steam turbine , the first low-pressure steam turbine, the second low-pressure steam turbine, and the second medium-pressure steam turbine realize the drive and power generation operation of the second generator through the second reduction gearbox, and the first low-pressure steam turbine The main steam outlet of the turbine is connected to the main steam inlet of the second low-pressure heater, the main steam outlet of the second low-pressure steam turbine is connected to the condensation inlet of the condenser, and the condensation outlet of the condenser is connected to the condensed water recovery device, the main steam outlet of the second medium-pressure steam turbine is connected with the main steam inlet of the first low-pressure heater.

In the heating power generation system, the high-pressure copper smelting saturated steam is throttled and depressurized first, so that the difficulty of sealing the shaft seal is reduced. The steam is then separated from steam and heated by a heater to increase the dryness of the steam, guarantee the working stability of the subsequent steam turbine, and reduce the corrosion effect on the operating contact structure. Afterwards, the steam discharged from the first medium-pressure steam turbine is used for heating on the one hand, and power generation operation on the other hand, and the steam discharged after the power generation operation is condensed through the condenser, and the condensed water obtained by condensation is recycled and reused . The setting of the system ensures the rational allocation of resources, reduces the corrosion damage to the operating structure during operation, and provides a guarantee for the continuous and stable working effect of the system structure.

Further, the first low-pressure steam turbine, the second low-pressure steam turbine, the first medium-pressure steam turbine and the second medium-pressure steam turbine are centripetal radial-flow steam turbines, so The centripetal radial steam turbine is a high-speed cantilever structure, the first medium-pressure steam turbine is assembled with the high-speed shaft of the first reduction gearbox, and the first generator is connected to the first reduction gearbox through a coupling. The low-speed shaft of the gearbox is connected, the first low-pressure steam turbine, the second low-pressure steam turbine and the second medium-pressure steam turbine are assembled with the high-speed shaft of the second reduction gearbox, and the second generator Connect with the low-speed shaft of the second reduction gearbox through a coupling.

Further, a three-section labyrinth seal and a one-section comb tooth oil seal are respectively arranged between the steam turbine and the reduction gear box, and the shaft seal exhaust hole of the first section of the labyrinth seal of the first medium-pressure steam turbine, The exhaust hole of the shaft seal of the first labyrinth seal of the second medium-pressure steam turbine, the steam inlet hole of the shaft seal of the first labyrinth seal of the first low-pressure steam turbine, and the first labyrinth seal of the second low-pressure steam turbine The shaft seal steam inlets of the labyrinth shaft seals are connected, and the shaft seal exhaust holes of the other labyrinth shaft seals are all connected with the external atmosphere.

Further, the steam turbine is a centripetal radial flow steam turbine.

Further, the steam inlet communicates with the heating steam inlet of the first medium-pressure heater.

Further, the steam inlet communicates with the heating steam inlet of the second medium pressure heater.

The beneficial effects of the present invention are:

1. The setting of the steam pressure reducing valve enables the steam in the system to be throttled and depressurized first, which reduces the difficulty of sealing the shaft seal during the steam operation process, and facilitates the application of steam resources. Heating improves steam dryness, reduces droplet precipitation during operation, and at the same time reduces erosion damage to the internal structure of the operating device, ensuring the normal service life of each device. The repeated application of exhaust gas for heating and power generation improves the resource utilization rate. The system setting ensures the reasonable allocation of resources, reduces the corrosion damage of the operating structure caused by steam during operation, and provides a continuous and stable working effect for the system structure. Assure;

2. The centripetal radial steam turbine is used as the expander, which realizes the customization of steam inlet and outlet parameters, expands the application range of the device, and improves the work flexibility;

3. The combination of the labyrinth seal and the comb-tooth oil seal achieves the effect of stable sealing transmission and protection of the gearbox bearing, which ensures the working stability. At the same time, the setting of the steam inlet and exhaust ports ensures the balance between the shaft seals and improves the performance of the shaft seal. job stability;

4. The system directly connects the steam at the inlet of the high-pressure copper smelting saturated steam to the heater, uses the steam before decompression to properly heat the decompressed saturated steam, and improves the first medium-pressure steam turbine, The dryness of the saturated steam generated by the second medium-pressure steam turbine makes it slightly superheated, which realizes the rational use of resources;

5. Part of the steam discharged from the first medium-pressure steam turbine of the system is directly connected to the heater, which improves the dryness of the saturated steam generated by the first low-pressure steam turbine and the second low-pressure steam turbine, making it There is slight superheat, which realizes the rational application of resources.

Description of drawings

Fig. 1 is the overall connection schematic diagram of a high-pressure saturated steam power generation and heating system in a copper smelting process of the present invention;

Fig. 2 is the first low-pressure steam turbine, the second low-pressure steam turbine, the first medium-pressure steam turbine and the second medium-pressure steam turbine of a high-pressure saturated steam power generation and heating system in a copper smelting process of the present invention. Schematic diagram of the labyrinth seal connection of the flat machine;

Marked in the figure: steam pressure reducing valve 10, steam-water separator 20, first low-pressure heater 31, second low-pressure heater 32, first medium-pressure heater 33, second medium-pressure heater 34, first low-pressure steam The turbine 41, the first labyrinth seal 411 of the first low-pressure steam turbine, the second labyrinth seal 412 of the first low-pressure steam turbine, the third labyrinth seal 413 of the first low-pressure steam turbine, Comb oil seal 414 of the first low-pressure steam turbine, second low-pressure steam turbine 42, first-stage labyrinth seal 421 of the second low-pressure steam turbine, second-stage labyrinth seal of the second low-pressure steam turbine 422, the third stage labyrinth seal 423 of the second low pressure steam turbine, the comb oil seal 424 of the second low pressure steam turbine, the first medium pressure steam turbine 43, the first medium pressure steam turbine One-stage labyrinth seal 431, second-stage labyrinth seal 432 of the first medium-pressure steam turbine, third-stage labyrinth seal 433 of the first medium-pressure steam turbine, comb tooth oil seal of the first medium-pressure steam turbine 434, the second medium-pressure steam turbine 44, the first-stage labyrinth seal 441 of the second medium-pressure steam turbine, the second-stage labyrinth seal 442 of the second medium-pressure steam turbine, the second medium-pressure steam turbine The third labyrinth seal 443 of the flat machine, the comb oil seal 444 of the second medium-pressure steam turbine, the first reduction gearbox 51, the second reduction gearbox 52, the first generator 61, the second generator 62, condenser 70.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The structure of the high-pressure saturated steam power generation and heating system in the copper smelting process is shown in Figure 1. The outlet of the steam inlet connected with the high-pressure copper smelting saturated steam is respectively connected to the steam valve 10, the heating inlet of the first medium-pressure heater 33 and the first medium-pressure heater 33. Two heating inlets of medium pressure heater 34. The other end of the steam valve 10 is connected to the separation inlet of the steam-water separator 20, the separation outlet is connected to the main steam inlet of the first medium-pressure heater 33, and the main steam outlet of the first medium-pressure heater 33 is connected to the second medium-pressure steam The main steam inlet of the turbine 43. The second medium-pressure steam turbine 44 is connected to drive the first generator 61 through the first reduction gearbox 51 . The second medium-pressure steam turbine 44, the first reduction gearbox and the first generator 61 are combined into a back pressure generator set. The main steam outlet of the second medium-pressure steam turbine 44 is connected to the heating pipe and connected to the external heating equipment to realize the heating operation. The main steam outlet of the second medium-pressure steam turbine 44 is also connected to the main steam inlet of the second medium-pressure heater 34 and the second low-pressure heater 32 . The main steam inlet of the second medium-pressure heater 34 is connected to the main steam outlet of the first medium-pressure steam turbine 43 . The main steam outlet of the first medium-pressure steam turbine 43 is connected to the heating steam inlet of the first low-pressure heater 31, and the main steam outlet of the first low-pressure heater 31 is connected to the main steam inlet of the first low-pressure steam turbine 41 . The main steam outlet of the first low-pressure steam turbine 41 is connected to the main steam inlet of the second low-pressure heater 32 , and the main steam outlet of the first low-pressure heater 32 is connected to the main steam inlet of the second low-pressure steam turbine 42 . The main steam outlet of the second low-pressure steam turbine 42 is connected to the condensation inlet of the condenser 70, and the condensed water discharged from the condensation outlet of the condenser 70 can be directly recycled to the copper smelting process for reuse. The first low-pressure steam turbine 41 , the second low-pressure steam turbine 42 and the second medium-pressure steam turbine 44 are connected to drive the second generator 62 through the second reduction gearbox 52 . The first generator 61 and the second generator 62 generate electricity and connect to the grid. The first low-pressure steam turbine 41 , the second low-pressure steam turbine 42 , the second medium-pressure steam turbine 44 , the second reduction gear box and the second motor form a pure condensing generator set.

Above-mentioned first low-pressure steam turbine 41, second low-pressure steam turbine 42, first medium-pressure steam turbine 43 and second medium-pressure steam turbine 44 are centripetal radial-flow steam turbines and are high-speed Cantilever structure. The first medium-pressure steam turbine 43 is assembled with the high-speed shaft of the first reduction gearbox 51 , and the first generator 61 is connected with the low-speed shaft of the first reduction gearbox 51 through a coupling. Similarly, the first low-pressure steam turbine 41, the second low-pressure steam turbine 42, and the second medium-pressure steam turbine 44 are assembled with the high-speed shaft of the second reduction gearbox 52, and the second generator 62 is The gear is connected with the low-speed shaft of the second reduction gearbox 52. In addition, three sections of labyrinth seals and one section of comb tooth oil seal are arranged between the steam turbine and the reduction gear box respectively. The labyrinth seal is equipped with a number of circular sealing teeth arranged in sequence around the rotating shaft. A series of interception gaps and expansion cavities are formed between the teeth. The sealed medium produces a throttling effect when passing through the gaps of the labyrinth to achieve the purpose of leak prevention. . There is a gap between the rotor and the casing of the labyrinth seal, no solid contact, no lubrication, and thermal expansion is allowed, suitable for high temperature, high pressure, and high speed frequency. According to the structure of the sealing teeth, the labyrinth seal is divided into two types: sealing sheet and sealing ring. The sealing sheet has a compact structure, and when it collides with the casing during operation, the sealing sheet can be bent to both sides to reduce friction and is easy to replace. The sealing ring is composed of 6-8 sector blocks, which are put into the casing and the rotating shaft, and each ring is pressed on the casing with a spring leaf, and the pressing force of the spring leaf is about 60-100N. When the shaft collides with the gear ring, the gear ring bounces off by itself to avoid friction. The combination of the labyrinth seal and the comb oil seal achieves a stable sealing transmission effect and ensures working stability. As shown in Figure 2, the shaft seal exhaust hole of the first section of the labyrinth seal 431 of the first medium-pressure steam turbine, the shaft seal exhaust hole of the first section of the labyrinth seal 441 of the second medium-pressure steam turbine, the second The main steam outlet of the medium pressure steam turbine 44, the shaft seal steam inlet of the first labyrinth seal 411 of the first low pressure steam turbine, and the shaft seal steam inlet of the first labyrinth seal 421 of the second low pressure steam turbine connected. Then the second section labyrinth seal 412 of the first low pressure steam turbine, the third section labyrinth seal 413 of the first low pressure steam turbine, the comb tooth oil seal 414 of the first low pressure steam turbine, the second low pressure steam turbine The second section of the labyrinth seal 422 of the second low-pressure steam turbine, the third section of the labyrinth seal 423 of the second low-pressure steam turbine, the comb tooth oil seal 424 of the second low-pressure steam turbine, the second section of the labyrinth of the first medium-pressure steam turbine Seal 432, the third stage labyrinth seal 433 of the first medium-pressure steam turbine, the comb oil seal 434 of the first medium-pressure steam turbine, the second medium-pressure steam turbine 44, the second medium-pressure steam turbine The first stage labyrinth seal 441 of the machine, the second stage labyrinth seal 442 of the second medium pressure steam turbine, the third stage labyrinth seal 443 of the second medium pressure steam turbine, the second stage labyrinth seal 443 of the second medium pressure steam turbine The comb tooth oil seal 444 and the exhaust hole are all connected with the external atmosphere. Through the setting method of the above-mentioned shaft seal structure, the shaft seals of the first low-pressure turbine generator 41, the second low-pressure turbine generator, the first medium-pressure turbine generator 43, and the second medium-pressure turbine generator 44 are uniformly arranged. get balanced.

After connecting each device according to Figure 1 and Figure 2, the actual operation can be performed. In a copper smelting process, when matte is blown by a converter to obtain blister copper with a copper content greater than 97.5%, the waste heat boiler will generate 32.0t/h, 3.90MPa(A) saturated steam and enter the power generation heating along with the steam inlet. system. Among them, 31.3t/h of steam passes through the steam pressure reducing valve 10 and then the pressure drops to 2.095MPa(A), and then passes through the steam-water separator 20 for steam-water separation. The mass flow rate of the above steam pressure reducing valve 10 is 32.0t/h, the inlet temperature is 248.9°C, 3.90MPa(A), and the inlet pressure is 2.095MPa(A). The inlet pressure of the steam-water separator 20 is 3.90MPa(A), the inlet steam temperature is 248.9°C, the separation output is 32.0t/h, and the material is 345R. After the separated steam is heated to a pressure of 2.00MPa (A) and a temperature of 228°C in the first medium-pressure heater 33, it enters the first medium-pressure steam turbine 43 to work, and then the first medium-pressure steam turbine 43 The first generator 61 is driven by the first reduction gearbox 51 to generate electricity. The unit type of the first medium-pressure steam turbine 43 is a back pressure power generation, semi-open centripetal turbine. And the impeller of the first medium-pressure steam turbine 43 is a precipitation-hardened stainless steel impeller. The gear form of the first gear reduction box 51 is a multi-stage carburized parallel gear. The high-speed support bearing of the first gear reduction box 51 is a tilting pad bearing, and the high-speed thrust bearing is a tilting pad thrust bearing. The high-speed bearing is connected to the first medium-pressure steam turbine 43 . Simultaneously, its low-speed support bearing is a round shoe, and the low-speed thrust bearing is a plane combined bearing, and the low-speed bearing is connected with the first generator 61 through a shaft coupling. The 855.2KW output power of the above-mentioned back pressure generating set is incorporated into the power grid.

The steam discharged from the above-mentioned first medium-pressure steam turbine 43 has 20.0t/h for heating, and another part of 700kg/h leads to the first low-pressure heater 31 and the second low-pressure heater 33 as heating steam. The steam discharged from the first medium-pressure steam turbine 43 still has 10.55 t/h steam leading to the pure condensing power unit. After the steam is discharged, it enters the second medium-pressure heater 34 for heating operation, and the heated steam enters the second medium-pressure steam turbine 44 to perform work. The steam discharged from the corresponding second medium-pressure steam turbine 44 is passed into the first low-pressure heater 31 for heating, and the steam heated in the first low-pressure heater 31 is passed into the first low-pressure steam turbine 41 Perform power driving. The main steam discharged from the first low-pressure steam turbine 41 enters the second low-pressure heater 32 for heating operation, and then flows into the second low-pressure steam turbine 42 along with the pipeline for driving. The high-speed shaft assembly of the second reduction gear box 52 of the first low-pressure steam turbine 41, the second low-pressure steam turbine 42, and the second medium-pressure steam turbine 44, the low speed of the second reduction gear box 52 The shaft assembly can be connected to the second generator 62 through a coupling. At this time, the second generator 62 is driven by the steam turbine to generate electricity. The pure condensing generator set outputs 1343.3KW of electricity and feeds it into the grid. The main steam outlet of the second low-pressure steam turbine 42 is passed into the condenser 70, and condensed water is obtained through the condensation operation of the condenser 70. The condensed water of 10.55t/h can be recycled to the copper smelting process for reuse. The unit types of the second medium-pressure steam turbine 44 , the first low-pressure steam turbine 41 and the second low-pressure steam turbine 42 are pure condensing power generation, semi-open centripetal turbines. The impeller type is a precipitation hardened stainless steel impeller. The second reduction gear box 52 is the same as the first reduction gear box 51 , and the connection method is the same as that of the above-mentioned first reduction gear box 51 . The generator set in the power generation system adopts the structural form of GST turbine, gear reducer and generator of Suzhou West Turbine Power Technology Co., Ltd. A synchronous generator with an installed capacity of 1,000kW+1,500kW can output a total of 2198.5kW of electric power.

In this embodiment, the shaft seal leakage steam behind the first stage labyrinth seal 431 of the first medium-pressure steam turbine is the same as the shaft seal leakage steam behind the first stage labyrinth seal 441 of the second medium-pressure steam turbine, and the second The main steam outlet of the medium pressure steam turbine 44, the shaft seal inlet steam behind the first labyrinth seal 411 of the first low pressure steam turbine, the shaft seal inlet steam behind the first labyrinth seal 421 of the second low pressure steam turbine The vapor phase is connected, and these connected pipelines maintain a pressure of 0.300MPa(A). The shaft seal behind the second-stage labyrinth seal 432 of the first medium-pressure steam turbine, the shaft seal behind the second-stage labyrinth seal 442 of the second medium-pressure steam turbine, and the second-stage labyrinth seal of the first low-pressure steam turbine The shaft seal behind 412 and the shaft seal behind the second stage labyrinth seal 422 of the second low-pressure steam turbine all exhaust the atmosphere. At this time, the shaft seals of the four turbines were effectively balanced and sealed.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. A high-pressure saturated steam power generation and heating system in a copper smelting process is characterized in that it includes a steam inlet for communicating with the high-pressure copper smelting saturated steam, a steam pressure reducing valve (10), a steam-water separator (20), a heater , a steam turbine and a generator, the heaters include a first low-pressure heater (31), a second low-pressure heater (32), a first medium-pressure heater (33) and a second medium-pressure heater (34), the steam turbine includes a first low-pressure steam turbine (41), a second low-pressure steam turbine (42), a first medium-pressure steam turbine (43) and a second medium-pressure steam turbine A turbine (44), the generator includes a first generator (61) and a second generator (62), the separation inlet of the steam-water separator (20) communicates with the steam inlet, and the steam is decompressed The valve (10) is arranged between the steam-water separator (20) and the steam inlet, and the separation outlet of the steam-water separator (20) is connected to the heating steam inlet of the first medium-pressure heater (33), and the first medium-pressure The heating steam outlet of the heater (33) is connected to the main steam inlet of the first medium-pressure steam turbine (43), and the first medium-pressure steam turbine (43) is realized by the first reduction gear box (51). The first generator (61) drives the power generation operation, and the main steam outlet of the first medium-pressure steam turbine (43) is connected to the heating passage and connected to the external heating equipment, and the first medium-pressure steam turbine (43) The main steam outlet of the first low-pressure heater (31), the heating steam inlet of the second low-pressure heater (32) and the main steam inlet of the second medium-pressure heater (34) are connected respectively through pipelines, and the first low-pressure heating The heated steam outlets of the device (31), the second low-pressure heater (32) and the second medium-pressure heater (34) are respectively connected with the first low-pressure steam turbine (41), the second low-pressure steam turbine (42) and the main steam inlet of the second medium-pressure steam turbine (44), the first low-pressure steam turbine (41), the second low-pressure steam turbine (42) and the second medium-pressure steam turbine ( 44) Realize the driving power generation operation to the second generator (62) through the second reduction gearbox (52), the gas discharge port of the first low-pressure steam turbine (41) and the second low-pressure heater (32) The main steam inlet of the second low-pressure steam turbine (42) is connected to the condensing inlet of the condenser (70), and the condensing outlet of the condenser (70) is connected to the condensate recovery device. The main steam outlet of the second medium-pressure steam turbine (44) is connected with the main steam inlet of the first low-pressure heater (31). 2. The high-pressure saturated steam power generation and heating system in a copper smelting process according to claim 1, characterized in that, the first low-pressure steam turbine (41), the second low-pressure steam turbine (42), The first medium-pressure steam turbine (43) and the second medium-pressure steam turbine (44) are centripetal radial-flow steam turbines, and the centripetal radial-flow steam turbine is a high-speed cantilever structure, so The first medium-pressure steam turbine (43) is assembled with the high-speed shaft of the first reduction gearbox (51), and the first generator (61) is connected to the low-speed shaft of the first reduction gearbox (51) through a coupling. Shaft connection, the high-speed shaft of the first low-pressure steam turbine (41), the second low-pressure steam turbine (42) and the second medium-pressure steam turbine (44) and the second reduction gearbox (52) Assembled, the second generator (62) is connected with the low-speed shaft of the second reduction gearbox (52) through a coupling. 3. A high-pressure saturated steam power generation and heating system in a copper smelting process according to claim 1, characterized in that, three sections of labyrinth seals and one section of comb-tooth oil seals are respectively arranged between the steam turbine and the reduction gear box, The shaft seal exhaust hole of the first section of the labyrinth seal (431) of the first medium-pressure steam turbine, the shaft seal exhaust hole of the first section of the labyrinth seal (441) of the second medium-pressure steam turbine, the second The main steam outlet of the medium-pressure steam turbine (44), the shaft seal steam inlet of the first-stage labyrinth seal (411) of the first low-pressure steam turbine, and the first labyrinth seal (421) of the second low-pressure steam turbine The shaft seal steam inlets of the labyrinth shaft seals are connected, and the shaft seal exhaust holes of the other labyrinth shaft seals are all connected with the external atmosphere. 4. A high-pressure saturated steam power generation and heating system in a copper smelting process according to claim 1, characterized in that the steam inlet is connected to the heating steam inlet of the first medium-pressure heater (33). 5. A high-pressure saturated steam power generation and heating system for copper smelting process according to claim 1, characterized in that, the steam inlet is connected to the heating steam inlet of the second medium-pressure heater (34).