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

Abstract

The present invention discloses a high-pressure saturated steam power generation and heating system for copper smelting process applied to the field of pyrometallurgical copper smelting, wherein the steam inlet is connected to a steam pressure reducing valve, a steam-water separator, a first medium-pressure heater and a first medium-pressure steam turbine in sequence, and the first generator is driven to generate electricity through a first reduction gearbox, the main steam outlet of the first medium-pressure steam turbine is connected to a heating channel, the heating steam inlet of the first low-pressure heater, the heating steam inlet of the second low-pressure heater and the heating steam inlet of the second medium-pressure heater, the main steam outlets of the first 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 and drive the second generator through a second reduction gearbox. The system ensures the reasonable allocation of resources, reduces the corrosion damage of the operating structure during operation, and provides a guarantee for the stable working effect of the system structure.

Description

Technical Field

[0001] The invention relates to a high-pressure saturated steam power generation and heating system in a copper smelting process applied in the field of pyrometallurgical copper smelting. Background Art

[0002] A large amount of saturated steam is generated during the pyrometallurgical copper smelting 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 pyrometallurgical copper smelting process inevitably contains condensed water, which is easy to precipitate droplets during the expansion power generation process. In the steam power generation process, a traditional axial flow steam turbine is usually used. The device has large vibrations and increases the erosion effect of droplets on the internal structure. At the same time, high-pressure (especially greater than 2.00MPa (A)) saturated steam is directly used for power generation, which increases the structural requirements for the power generation device. Due to the difficulty of sealing the high-pressure shaft seal, more liquid water is precipitated from the steam during the expansion power generation process, increasing the production cost. When extraction operation is required, the traditional axial flow steam turbine is often designed based on the original model, and the parameters are not freely customized, which reduces the application range of the device. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a high-pressure saturated steam power generation and heating system in a copper smelting process that effectively ensures working stability.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A medium- and high-pressure saturated steam power generation and heating system in a copper smelting process, comprising a steam inlet for communicating with high-pressure copper smelting saturated steam, a steam pressure reducing valve, a steam-water separator, a heater, a steam turbine and a generator, wherein the heater comprises a first low-pressure heater, a second low-pressure heater, a first medium-pressure heater and a second medium-pressure heater, the steam turbine comprises a first low-pressure steam turbine, a second low-pressure steam turbine, a first medium-pressure steam turbine and a second medium-pressure steam turbine, the generator comprises a first generator and a second generator, the separation inlet of the steam-water separator is connected to the steam inlet, 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, the main steam outlet of the first medium-pressure heater is connected to the main steam inlet of the first medium-pressure steam turbine, the first medium-pressure steam turbine drives the first generator to generate electricity through a first reduction gearbox, and the The main steam outlet of the first medium-pressure steam turbine is connected to the heating channel and is connected to the external heating equipment. The main steam outlet is connected to the heating steam inlet of the first low-pressure heater, the second low-pressure heater and the main steam inlet of the second medium-pressure heater through pipelines. The main steam outlets of the first 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 driving and power generation operation of the second generator through the second reduction gearbox. The main steam outlet of the first low-pressure steam 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, the condensation outlet of the condenser is connected to the condensate recovery device, and the main steam outlet of the second medium-pressure steam turbine is connected to the main steam inlet of the first low-pressure heater.

[0006] The heating and power generation system first throttles and reduces the pressure of the high-pressure copper-smelting saturated steam to reduce the difficulty of sealing the shaft seal. The steam is then separated from the steam and heated by the heater to increase the steam dryness, which provides a guarantee for the working stability of the subsequent steam turbine and reduces the corrosion effect on the operating contact structure. After that, the exhaust steam of the first medium-pressure steam turbine is used for heating on the one hand and for power generation on the other hand. 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 this 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.

[0007] Furthermore, 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, the centripetal radial flow 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, the first generator is connected with the low-speed shaft of the first reduction gearbox through a coupling, 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 is connected with the low-speed shaft of the second reduction gearbox through a coupling.

[0008] Furthermore, three stages of labyrinth seals and one stage of comb tooth oil seal are respectively arranged between the steam turbine and the reduction gearbox; the shaft seal exhaust hole of the first stage of labyrinth seal of the first medium-pressure steam turbine, the shaft seal exhaust hole of the first stage of labyrinth seal of the second medium-pressure steam turbine, the shaft seal steam inlet hole of the first stage of labyrinth seal of the first low-pressure steam turbine and the shaft seal steam inlet hole of the first labyrinth seal of the second low-pressure steam turbine are connected, and the shaft seal exhaust holes of the other labyrinth shaft seals are all connected to the external atmosphere.

[0009] Furthermore, the steam turbine is a centripetal radial flow steam turbine.

[0010] Furthermore, the steam inlet is communicated with the heating steam inlet of the first medium-pressure heater.

[0011] Furthermore, the steam inlet is connected to the heating steam inlet of the second medium-pressure heater.

[0012] The beneficial effects of the present invention are:

[0013] 1. The setting of the steam pressure reducing valve makes the steam in the system throttle and reduce pressure first, which reduces the sealing difficulty of the shaft seal during the steam operation process and makes it easy to realize the application of steam resources. In addition, the steam dryness is increased by heating through the steam-water separator and the heater, which reduces the droplet precipitation phenomenon during the operation process and reduces the erosion damage to the internal structure of the operating device, ensuring the normal service life of each device. The exhaust gas of the steam turbine is also reused for heating and power generation in this system, which improves the resource utilization rate. The setting of the system ensures the reasonable allocation of resources, reduces the corrosion damage of the steam to the operating structure during the operation process, and provides a guarantee for the continuous and stable working effect of the system structure;

[0014] 2. The centripetal radial flow steam turbine is used as the expander, which enables the customization of steam inlet and outlet parameters with greater freedom, expands the application range of the device, and improves working flexibility;

[0015] 3. The labyrinth seal and comb oil seal cooperate to achieve stable sealing transmission and protect the gearbox bearing, ensuring working stability. At the same time, the setting of the steam inlet and exhaust ports ensures the balanced setting between the shaft seals and improves working stability.

[0016] 4. This system directly connects the steam at the inlet of high-pressure copper smelting saturated steam to the heater, and uses part of the steam before decompression to properly heat the saturated steam after decompression, thereby improving the dryness of the saturated steam for power generation of the first medium-pressure steam turbine and the second medium-pressure steam turbine, making it slightly superheated, and realizing the rational use of resources;

[0017] 5. A portion of the exhaust steam from the first medium-pressure steam turbine of the system is directly connected to the heater, which improves the dryness of the saturated steam for power generation of the first low-pressure steam turbine and the second low-pressure steam turbine, making it slightly superheated, thereby achieving rational use of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall connection of a high-pressure saturated steam power generation and heating system in a copper smelting process of the present invention;

[0019] Figure 2 A schematic diagram of a labyrinth seal connection of a first low-pressure steam turbine, a second low-pressure steam turbine, a first medium-pressure steam turbine and a second medium-pressure steam turbine in a high-pressure saturated steam power generation and heating system in a copper smelting process of the present invention;

[0020] In the figure, the symbols are: 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 turbine 41, first section labyrinth seal 411 of the first low-pressure steam turbine, second section labyrinth seal 412 of the first low-pressure steam turbine, third section labyrinth seal 413 of the first low-pressure steam turbine, comb tooth oil seal 414 of the first low-pressure steam turbine, second low-pressure steam turbine 42, first section labyrinth seal 421 of the second low-pressure steam turbine, second section labyrinth seal 422 of the second low-pressure steam turbine, third section labyrinth seal 423 of the second low-pressure steam turbine, The comb teeth oil seal 424 of the machine, the first medium pressure steam turbine 43, the first section labyrinth seal 431 of the first medium pressure steam turbine, the second section labyrinth seal 432 of the first medium pressure steam turbine, the third section labyrinth seal 433 of the first medium pressure steam turbine, the comb teeth oil seal 434 of the first medium pressure steam turbine, the second medium pressure steam turbine 44, the first section labyrinth seal 441 of the second medium pressure steam turbine, the second section labyrinth seal 442 of the second medium pressure steam turbine, the third section labyrinth seal 443 of the second medium pressure steam turbine, the comb teeth oil seal 444 of the second medium pressure steam turbine, the first reduction gear box 51, the second reduction gear box 52, the first generator 61, the second generator 62, and the condenser 70. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] The structure of the high-pressure saturated steam power generation and heating system in the copper smelting process is as follows: Figure 1As shown, the outlet portion connected to the steam inlet of 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 heating inlet of the second 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 main steam inlet of the second medium-pressure steam 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 pipeline and is 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 inlets 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 recovered 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 gear box 52. The first generator 61 and the second generator 62 generate electricity and are connected to the power 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 gearbox and the second motor constitute a pure condensing generator set.

[0023] 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 steam turbines and are high-speed cantilever structures. 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. 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 connected to the low-speed shaft of the second reduction gearbox 52 through a coupling. Three sections of labyrinth seals and one section of comb oil seal are respectively arranged between the steam turbine and the reduction gearbox. The labyrinth seal has several annular sealing teeth arranged in sequence around the rotating shaft, and a series of intercepting gaps and expansion cavities are formed between the teeth. When the sealed medium passes through the gaps of the tortuous labyrinth, a throttling effect is produced to achieve the purpose of leakage prevention. There is a gap between the rotor and the casing of the labyrinth seal, there is no solid contact, no lubrication is required, and thermal expansion is allowed, which can adapt to 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 plates and sealing rings. The sealing plate has a compact structure and collides with the casing during operation. The sealing plate can bend to both sides to reduce friction and is easy to disassemble and replace. The sealing ring is composed of 6 to 8 fan-shaped blocks, which are installed in the casing and the rotating shaft. Each ring is pressed against the casing with a spring sheet, and the spring sheet has a pressing force of about 60 to 100N. When the shaft collides with the toothed ring, the toothed ring pops open by itself to avoid friction. The labyrinth seal cooperates with the comb tooth oil seal to achieve a stable sealing transmission effect and ensure working stability. Such as Figure 2As shown, the shaft seal exhaust hole of the first stage labyrinth seal 431 of the first medium-pressure steam turbine, the shaft seal exhaust hole of the first stage labyrinth seal 441 of the second medium-pressure steam turbine, the main steam outlet of the second medium-pressure steam turbine 44, the shaft seal steam inlet hole of the first stage labyrinth seal 411 of the first low-pressure steam turbine and the shaft seal steam inlet hole of the first labyrinth seal 421 of the second low-pressure steam turbine are connected. The second-stage labyrinth seal 412 of the first low-pressure steam turbine, the third-stage 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-stage labyrinth seal 422 of the second low-pressure steam turbine, the third-stage 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-stage labyrinth seal 432 of the first medium-pressure steam turbine, the third-stage labyrinth seal 433 of the first medium-pressure steam turbine, the comb-tooth oil seal 434 of the first medium-pressure steam turbine, 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 third-stage labyrinth seal 443 of the second medium-pressure steam turbine, the comb-tooth oil seal 444 of the second medium-pressure steam turbine, and the exhaust hole are all connected to the external atmosphere. By means of the above-mentioned setting method of the 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 all balanced.

[0024] according to Figure 1 and Figure 2After all the equipment is connected, actual operation can be carried out. In a copper smelting process, when matte is smelted in a converter to obtain crude copper containing more than 97.5% copper, the waste heat boiler will produce 32.0t / h, 3.90MPa (A) saturated steam and enter the power generation and heating system through the steam inlet. Among them, 31.3t / h of steam passes through the steam pressure reducing valve 10 and the pressure is reduced to 2.095MPa (A) and then passes through the steam-water separator 20 for steam-water separation. The mass flow rate of the above-mentioned steam pressure reducing valve 10 is 32.0t / h, the inlet temperature is 248.9℃, 3.90MPa (A), and the inlet pressure is 2.095MPa (A). The inlet pressure of the above-mentioned steam-water separator 20 is 3.90MPa (A), the inlet temperature is 248.9℃, the separation output is 32.0t / h, and the material is 345R. The separated steam is heated to a pressure of 2.00 MPa (A) and a temperature of 228°C in the first medium-pressure heater 33 and then enters the first medium-pressure steam turbine 43 to work. Then the first medium-pressure steam turbine 43 drives the first generator 61 to generate electricity through the first reduction gearbox 51. 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. At the same time, its low-speed support bearing is a round pad, and the low-speed thrust bearing is a plane combined bearing. The low-speed bearing is connected to the first generator 61 through a coupling. The above-mentioned back-pressure generator set outputs 855.2KW of electricity and is incorporated into the power grid.

[0025] The steam discharged from the first intermediate pressure steam turbine 43 is 20.0t / h for heating, and the other 700kg / h is passed to the first low pressure heater 31 and the second low pressure heater 33 as heating steam. The steam discharged from the first intermediate pressure steam turbine 43 also has 10.55t / h of steam passed to the pure condensing power generation unit. After being discharged, the steam enters the second intermediate pressure heater 34 for heating operation, and the heated steam enters the second intermediate pressure steam turbine 44 for work. The steam discharged from the corresponding second intermediate 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 for work 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 through the pipeline for driving. The high-speed shaft assembly of the second reduction gearbox 52 of the first low-pressure steam turbine 41, the second low-pressure steam turbine 42 and the second medium-pressure steam turbine 44, at this time, the low-speed shaft assembly of the second reduction gearbox 52 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, and the pure condensing generator set outputs 1343.3KW of electricity and is incorporated into the power grid. The main steam outlet of the second low-pressure steam turbine 42 is connected to the condenser 70, and the condensation operation of the condenser 70 obtains condensed water. This 10.55t / h condensed water can be recycled and reused in the copper smelting process. The unit type of the second medium-pressure steam turbine 44, the first low-pressure steam turbine 41 and the second low-pressure steam turbine 42 is a pure condensing power generation, semi-open centripetal turbine. The type of the impeller is a precipitation hardened stainless steel impeller. The second reduction gearbox 52 is the same as the first reduction gearbox 51, and the connection method is the same as the setting method of the first reduction gearbox 51. The generator set in this power generation system adopts the structure of GST turbine, gear reducer and generator of Suzhou West Turbine Power Technology Co., Ltd. The synchronous generator with installed capacity of 1,000kW+1,500kW can output a total of 2198.5kW of electric power.

[0026] In this embodiment, the shaft seal leakage steam after the first stage labyrinth seal 431 of the first medium-pressure steam turbine is connected with the shaft seal leakage steam after the first stage labyrinth seal 441 of the second medium-pressure steam turbine, the main steam outlet of the second medium-pressure steam turbine 44, the shaft seal inlet steam after the first stage labyrinth seal 411 of the first low-pressure steam turbine, and the shaft seal inlet steam after the first stage labyrinth seal 421 of the second low-pressure steam turbine, and these connected pipelines maintain a pressure of 0.300MPa (A). The shaft seal after the second stage labyrinth seal 432 of the first medium-pressure steam turbine, the shaft seal after the second stage labyrinth seal 442 of the second medium-pressure steam turbine, the shaft seal after the second stage labyrinth seal 412 of the first low-pressure steam turbine, and the shaft seal after the second stage labyrinth seal 422 of the second low-pressure steam turbine are all exhausted to the atmosphere. At this time, the shaft seals of the four turbines are all effectively balanced and sealed.

[0027] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure saturated steam power generation and heating system in a copper smelting process, characterized in that: The invention comprises a steam inlet for communicating with 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, wherein the heater comprises 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 comprises 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 (44); and the generator comprises a first generator (61) and a second generator (62). The separation inlet of the steam-water separator (20) is connected to the steam inlet, the steam pressure reducing valve (10) is arranged between the steam-water separator (20) and the steam inlet, the separation outlet of the steam-water separator (20) is connected to the heating steam inlet of the first medium-pressure heater (33), the heating steam outlet of the first medium-pressure heater (33) is connected to the main steam inlet of the first medium-pressure steam turbine (43), the first medium-pressure steam turbine (43) drives the first generator (61) to generate electricity through the first reduction gear box (51), and the main steam outlet of the first medium-pressure steam turbine (43) is connected to the heating steam inlet of the first medium-pressure steam turbine (43). The heating channel is connected to an external heating device, 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), the second low-pressure heater (32) and the main steam inlet of the second medium-pressure heater (34) through a pipeline, the heating steam outlets of the first low-pressure heater (31), the second low-pressure heater (32) and the second medium-pressure heater (34) are connected to the main steam inlet of the first low-pressure steam turbine (41), the second low-pressure steam turbine (42) and the second medium-pressure steam turbine (44), respectively, the first low-pressure steam turbine (41 ), a second low-pressure steam turbine (42) and a second medium-pressure steam turbine (44) realize driving and generating operation of a second generator (62) through a second reduction gearbox (52), a gas exhaust port of the first low-pressure steam turbine (41) is connected to a main steam inlet of a second low-pressure heater (32), a main steam outlet of the second low-pressure steam turbine (42) is connected to a condensation inlet of a condenser (70), a condensation outlet of the condenser (70) is connected to a condensate recovery device, and a main steam outlet of the second medium-pressure steam turbine (44) is connected to a main steam inlet of the first low-pressure heater (31).

2. A copper smelting process medium and high pressure saturated steam power generation and heating system 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 turbines are high-speed cantilever structures. 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. 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 connected to the low-speed shaft of the second reduction gearbox (52) through a coupling.

3. A copper smelting process medium and high pressure saturated steam power generation and heating system according to claim 1, characterized in that: Three sections of labyrinth seals and one section of comb oil seal are respectively arranged between the steam turbine and the reduction gearbox; the shaft seal exhaust hole of the first section of labyrinth seal (431) of the first medium-pressure steam turbine, the shaft seal exhaust hole of the first section of labyrinth seal (441) of the second medium-pressure steam turbine, the main steam outlet of the second medium-pressure steam turbine (44), the shaft seal steam inlet hole of the first section of labyrinth seal (411) of the first low-pressure steam turbine and the shaft seal steam inlet hole of the first labyrinth seal (421) of the second low-pressure steam turbine are connected; the shaft seal exhaust holes of the other labyrinth shaft seals are all connected to the external atmosphere.

4. A copper smelting process medium and high pressure saturated steam power generation and heating system 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. The 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).

Images