High-flow uniform adjustable steam supplementing device and method for low-temperature waste heat steam turbine
By designing a gradually changing make-up steam chamber and guide channel in the low-temperature waste heat steam turbine, the flow loss and vibration water erosion problems of traditional make-up steam turbines are solved, achieving uniform steam intake and efficient utilization, and improving the recovery efficiency of industrial waste heat.
Patent Information
- Application Number
- CN202511251847.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2025-11-04
AI Technical Summary
Traditional steam turbines with added steam have large flow losses and low operating efficiency. In particular, adding saturated steam may cause turbine vibration and water erosion of components, and the utilization rate of industrial waste heat is low.
A high-flow, uniform, and adjustable steam injection device for a low-temperature waste heat steam turbine is designed. By using a guide channel with a gradually changing cross-sectional area from bottom to top along the circumference of the steam injection chamber, combined with a guide ring and a rectifier ring, uniform steam injection is achieved, reducing flow losses and preventing vibration and water erosion.
It achieves efficient recovery and utilization of low-temperature waste heat, reduces flow loss, avoids vibration and water erosion caused by uneven impact of saturated steam on the rotor, and improves the applicability and operational stability of the device.
Smart Images
Figure CN120889640A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of steam turbines, in particular to a large-flow uniform adjustable steam supplementing device and method for low-temperature waste heat steam turbines. BACKGROUND
[0002] The raw material processing and energy industry of steel, oil, chemical industry, building materials, non-ferrous smelting, etc. is a pillar industry in China, which occupies a dominant position in the national economic production. At the same time, these industries are also high-carbon industries, which produce a large amount of waste heat and energy. The unit energy consumption of China's main industrial products is higher than the international advanced level, the utilization rate of industrial waste heat is low, and the insufficient comprehensive utilization of energy (energy) is an important reason for high energy consumption. In the production process of oil, chemical industry, building materials, textile, metallurgy, etc., a large amount of low-temperature waste heat is generated, most of which exists in the form of saturated steam, and the recovery and utilization of the waste heat of saturated steam is very difficult. The low steam quality, difficult utilization, low investment return rate and other factors have not been given enough attention, and in most fields, it is regarded as excess and waste heat.
[0003] The steam supplementing turbine can utilize the energy of various waste heat in stages, convert steam heat energy into mechanical energy, and can drive the generator to generate electricity, or drive the water pump, fan, compressor, etc. With the promotion of the "double carbon" policy, higher requirements for energy saving and consumption reduction are put forward in various industries. The traditional steam supplementing turbine structure has large flow loss and low running efficiency, especially for saturated steam supplementing, which may cause vibration problems of the steam turbine and water erosion of the body parts. SUMMARY
[0004] The purpose of the present application is to solve the above technical defects. The present application provides a large-flow uniform adjustable steam supplementing device and method for low-temperature waste heat steam turbines. The cross-sectional area of the steam supplementing chamber changes gradually from bottom to top in the circumferential direction to realize uniform steam inlet of low-temperature waste heat with large flow. The angle of the flow guide channel can be adjusted according to the main steam and supplementing steam parameters during design and manufacturing to reduce the influence of steam supplementing on the main flow field, reduce flow loss, and avoid the occurrence of vortex area. Especially for saturated steam supplementing with large flow in industrial waste heat, the device can prevent irregular water droplets in the saturated steam from causing vibration problems caused by uneven impact on the rotor, and can also avoid water erosion of the rotor caused by saturated steam.
[0005] The technical scheme of the present application is as follows:
[0006] The application discloses a low-temperature waste heat steam turbine large-flow uniform adjustable steam supplement device, which comprises a rotor and a steam supplement chamber.
[0007] Preferably, the steam cylinder comprises a lower half steam cylinder and an upper half steam cylinder, the steam supplement chamber comprises a lower half steam supplement chamber and an upper half steam supplement chamber, the lower half steam supplement chamber and the upper half steam supplement chamber are respectively arranged in the lower half steam cylinder and the upper half steam cylinder, the lower half steam supplement chamber comprises a lower half steam supplement chamber wall and a lower half steam supplement ring body, the lower half steam supplement chamber wall is provided with a steam supplement pipe opening, the lower half steam supplement ring body is arranged on the inner side of the lower half steam supplement chamber wall, the lower half steam supplement ring body is located between the front stage partition plate and the rear stage partition plate, and the lower half steam supplement ring body is provided with a lower half steam supplement ring inlet; the upper half steam supplement chamber comprises an upper half steam supplement chamber wall and an upper half steam supplement ring body, the upper half steam supplement ring body is arranged on the inner side of the upper half steam supplement chamber wall, the upper half steam supplement ring body is located between the front stage partition plate and the rear stage partition plate, and the upper half steam supplement ring body is provided with an upper half steam supplement ring inlet.
[0008] Preferably, the lower half steam supplement ring body and the upper half steam supplement ring body are castings and are respectively arranged on the lower half steam cylinder and the upper half steam cylinder.
[0009] Preferably, the steam supplement chamber comprises a lower half steam supplement chamber and an upper half steam supplement chamber, the cross-sectional area of the steam supplement chamber decreases from bottom to top, the inner wall profile line of the steam supplement chamber at the lower half steam supplement inlet is set as profile line I-I, the inner wall profile line of the steam supplement chamber at the middle section of the lower half steam cylinder is set as profile line II-II, the inner wall profile line of the steam supplement chamber at the middle section of the upper half steam cylinder is set as profile line III-III, and the inner wall profile line of the steam supplement chamber at the top of the upper half steam cylinder is set as profile line IV-IV, so that the area of the profile line I-I is the largest, the areas of the profile line II-II and the profile line III-III are consistent, and the area of the profile line IV-IV is the smallest; the steam supplement flow rates at the outlets of the lower half steam supplement ring inlet and the upper half steam supplement ring inlet are kept consistent, so that the steam supplement flow rate is controlled.
[0010] Preferably, the front-stage partition plate comprises a front-stage partition plate lower half and a front-stage partition plate upper half, the front-stage partition plate lower half is provided with a lower half flow guide ring and a front main steam flow channel, and the front-stage partition plate upper half is provided with an upper half flow guide ring and a front main steam flow channel.
[0011] Preferably, the rear-stage partition plate comprises a rear-stage partition plate lower half and a rear-stage partition plate upper half, the rear-stage partition plate lower half is provided with a lower half rectifier ring, a lower half protective flow guide ring and a rear main steam flow channel, the diameter of the rear main steam flow channel is larger than that of the front main steam flow channel, a rapid mixing area of the main steam and the supplementary steam is formed between the lower half rectifier ring, the lower half protective flow guide ring and the lower half flow guide ring, the rear-stage partition plate upper half is provided with an upper half rectifier ring, an upper half protective flow guide ring and a rear main steam flow channel, the diameter of the rear main steam flow channel is larger than that of the front main steam flow channel, and a rapid mixing area of the main steam and the supplementary steam is formed between the upper half rectifier ring, the upper half protective flow guide ring and the upper half flow guide ring.
[0012] Preferably, the outer end surface of the flow guide ring on the front-stage partition plate and the inclined wall surface of the rectifier ring on the rear-stage partition plate constitute a flow guide channel, and the flow guide channel is a smooth diverging flow channel.
[0013] Preferably, the inner wall surface of the flow guide ring on the front-stage partition plate, the inner wall surface of the rectifier ring on the rear-stage partition plate and the outer wall surface of the protective flow guide ring on the rear-stage partition plate constitute a main flow channel, and the main flow channel is a smooth and gradually expanding main flow channel.
[0014] Preferably, the center line of the main flow channel is arranged to be deviated to the outside along the axial direction, the center line of the flow guide channel is at an angle of 40°-60° with the center line of the main flow channel, and the supplementary steam enters the flow guide channel and then uniformly flows into the main flow channel at an angle of 40°-60°.
[0015] The application also provides a supplementary steam method of the low-temperature waste heat steam turbine large-flow uniform adjustable supplementary steam device.
[0016] S1, installation: selecting appropriate rotors, front-stage partition plates, rear-stage partition plates, supplementary steam chambers and supplementary steam ring bodies, setting uniform distribution flow guide plates on the supplementary steam pipe openings of the supplementary steam chambers, and setting supplementary steam ring inlets in the supplementary steam ring bodies of the supplementary steam chambers, the front-stage partition plates and the rear-stage partition plates are all provided with main steam flow channels, the front-stage partition plates are provided with flow guide rings, and the rear-stage partition plates are provided with rectifier rings and protective flow guide rings, and the integral installation of the components is completed.
[0017] S2, starting: the main steam is introduced into the steam turbine, sequentially flows in the main steam flow channels of the front-stage partition plates and the rear-stage partition plates, and the supplementary steam flows into the supplementary steam chambers from the supplementary steam pipe openings and then flows out from the supplementary steam ring inlets, and the mixing of the supplementary steam and the main steam is realized between the flow guide rings, the rectifier rings and the protective flow guide rings.
[0018] S3, running and stopping: adjusting the operation parameters of the main steam and the supplementary steam including the flow rate, achieving the flow balance of the main steam and the supplementary steam, realizing the stable operation of the rotor of the steam turbine, and fully utilizing the supplementary steam energy.
[0019] Preferably, in the step S1 and the step S2, the inclination angle of the supplementary steam ring inlet and the flow guide channel is adjusted, and the supplementary steam ring inlet, the end face wall of the flow guide ring and the inclined wall of the flow straightener ring are processed, so that the supplementary steam is uniformly merged into the main steam at an angle of 40°-60°, and the best flow effect is realized.
[0020] Preferably, in the step S3, when the low-temperature waste heat supplementary steam is saturated steam, the flow rate of the supplementary steam pipe is limited to be less than or equal to 40 m / s, and the flow rate of the flow guide channel is limited to be less than or equal to 20 m / s.
[0021] The beneficial effects of the present application are as follows:
[0022] 1. By means of the gradually changed supplementary steam chamber and the inclined angle flow guide channel, the supplementary steam can be uniformly merged into the main flow channel in the circumferential direction, the influence of the supplementary steam on the main flow is reduced, and the supplementary steam can also be uniformly entered into the rear stage diaphragm nozzle, so that the flow loss and the unevenness of the rear stage steam admission are greatly reduced.
[0023] 2. According to different main flow parameters and supplementary steam parameters of the steam turbine, the specification and angle of the supplementary steam ring inlet, the angle of the end wall of the flow guide ring and the inclined wall of the flow straightener ring are only needed to be flexibly adjusted according to the results of the finite element flow field analysis during the design and manufacture, so that the parameter adaptability is realized, the best flow straightening effect is achieved, the flow loss is reduced, the supplementary steam component is passed through strongly, the manufacturing cost is low, and the production cycle is short.
[0024] 3. Especially for the saturated steam supplementary steam in the industrial waste heat, the water erosion of the saturated steam to the supplementary steam position cylinder and the diaphragm can be avoided, the vibration problem caused by the uneven impact of the irregular water droplets in the saturated steam on the rotor can be prevented, and the water erosion of the saturated steam to the rotor can also be avoided. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a schematic diagram of the upper half section of the low-temperature waste heat steam turbine large-flow uniform adjustable supplementary steam device of the present application;
[0026] Figure 2 is a schematic diagram of the lower half section of the low-temperature waste heat steam turbine large-flow uniform adjustable supplementary steam device of the present application;
[0027] Marked in the figure: 1 - steam supplement pipe, 2 - uniform distribution guide plate, 3 - lower half steam supplement chamber, 4 - lower half steam supplement chamber wall, 5 - lower half steam supplement ring body, 6 - lower half steam supplement ring inlet, 7 - front stage baffle lower half, 8 - lower half guide ring, 9 - rear stage baffle lower half, 10 - lower half protection guide ring, 11 - lower half rectification ring, 12 - upper half steam supplement chamber, 13 - upper half steam supplement chamber wall, 14 - upper half steam supplement ring body, 15 - upper half steam supplement ring inlet, 16 - front stage baffle upper half, 17 - upper half guide ring, 18 - rear stage baffle upper half, 19 - upper half protection guide ring, 20 - upper half rectification ring, 21 - guide channel, 22 - main flow channel, 23 - rotor. DETAILED DESCRIPTION
[0028] The specific implementation method of the present application is further described below in combination with the drawings:
[0029] Example 1
[0030] As shown in Figure 1 and Figure 2 , the low-temperature waste heat steam turbine large-flow uniform adjustable steam supplement device provided by the embodiment 1 of the present application includes a rotor 23 and a steam supplement chamber, the steam supplement chamber is located in the steam cylinder, the rotor 23 and the steam supplement chamber are installed with a front stage baffle and a rear stage baffle, the front stage baffle is located on the steam inflow side, and the rear stage baffle is located on the steam outflow side, the steam supplement chamber includes a steam supplement chamber wall and a steam supplement ring body, the steam supplement chamber wall is provided with a steam supplement pipe 1, the steam supplement ring body is installed on the inner side of the steam supplement chamber wall, the steam supplement ring body is located between the front stage baffle and the rear stage baffle, and the steam supplement ring body is provided with a steam supplement ring inlet, the front stage baffle is provided with a guide ring and a front main steam flow channel, the rear stage baffle is provided with a rectification ring, a protection guide ring and a rear main steam flow channel, the diameter of the rear main steam flow channel is greater than that of the front main steam flow channel, and the rectification ring, the protection guide ring and the guide ring form a rapid mixing area of the main steam and the steam supplement.
[0031] In the embodiment, the uniform distribution guide plate 2 is arranged on the steam supplement pipe 1, so that the low-temperature waste heat steam can enter the left and right sides of the steam supplement chamber evenly.
[0032] In the embodiment, the cylinder comprises a lower half cylinder and an upper half cylinder, the steam supplement chamber comprises a lower half steam supplement chamber 3 and an upper half steam supplement chamber 12, the lower half steam supplement chamber 3 and the upper half steam supplement chamber 12 are respectively installed in the lower half cylinder and the upper half cylinder, the lower half steam supplement chamber 3 comprises a lower half steam supplement chamber wall 4 and a lower half steam supplement ring body 5, the lower half steam supplement chamber wall 4 is provided with a steam supplement pipe opening 1, the lower half steam supplement ring body 5 is installed on the inner side of the lower half steam supplement chamber wall 4, the lower half steam supplement ring body 5 is located between the front stage baffle and the rear stage baffle, and the lower half steam supplement ring body 5 is provided with a lower half steam supplement ring inlet 6; the upper half steam supplement chamber 12 comprises an upper half steam supplement chamber wall 13 and an upper half steam supplement ring body 14, the upper half steam supplement ring body 14 is installed on the inner side of the upper half steam supplement chamber wall 13, the upper half steam supplement ring body 14 is located between the front stage baffle and the rear stage baffle, and the upper half steam supplement ring body 14 is provided with an upper half steam supplement ring inlet 15.
[0033] In the embodiment, the lower half steam supplement ring body 5 and the upper half steam supplement ring body 14 are castings and are respectively installed on the lower half cylinder and the upper half cylinder.
[0034] In the embodiment, the steam supplement chamber comprises the lower half steam supplement chamber 3 and the upper half steam supplement chamber 12, the cross-sectional area of the steam supplement chamber decreases from bottom to top, the profile I-I is an inner wall profile of the steam supplement chamber at the lower half steam supplement inlet, the profile II-II is an inner wall profile of the steam supplement chamber at the middle section of the lower half cylinder, the profile III-III is an inner wall profile of the steam supplement chamber at the middle section of the upper half cylinder, and the profile IV-IV is an inner wall profile of the steam supplement chamber at the top of the upper half cylinder, so that the area of the profile I-I is the largest, the areas of the profiles II-II and III-III are consistent, and the area of the profile IV-IV is the smallest, the steam supplement flow rates at the outlets of the lower half steam supplement ring inlet 6 and the upper half steam supplement ring inlet 15 are kept consistent, and thus the steam supplement flow rate is controlled.
[0035] In the embodiment, the front stage baffle comprises a front stage baffle lower half 7 and a front stage baffle upper half 16, the front stage baffle lower half 7 is provided with a lower half flow guide ring 8 and a front main steam flow channel, and the front stage baffle upper half 16 is provided with an upper half flow guide ring 17 and a front main steam flow channel.
[0036] In the embodiment, the rear stage partition plate comprises a rear stage partition plate lower half 9 and a rear stage partition plate upper half 18. The rear stage partition plate lower half 9 is provided with a lower half rectifying ring 11, a lower half protective flow guiding ring 10 and a rear main steam flow channel, the diameter of the rear main steam flow channel is larger than that of the front main steam flow channel, and a rapid mixing area of the main steam and the supplementary steam is formed between the lower half rectifying ring 11, the lower half protective flow guiding ring 10 and the lower half flow guiding ring 8. The rear stage partition plate upper half 18 is provided with an upper half rectifying ring 20, an upper half protective flow guiding ring 19 and a rear main steam flow channel, the diameter of the rear main steam flow channel is larger than that of the front main steam flow channel, and a rapid mixing area of the main steam and the supplementary steam is formed between the upper half rectifying ring 20, the upper half protective flow guiding ring 19 and the upper half flow guiding ring 17.
[0037] In the embodiment, the lower half protective flow guiding ring 10 of the rear stage partition plate lower half 9 and the upper half protective flow guiding ring 19 of the rear stage partition plate upper half 18 not only constitute the main flow channel 22, but also protect the steam turbine. For the saturated steam supplementary steam, the irregular water droplets in the supplementary steam do not uniformly impact the rotor 23, thereby preventing the vibration of the steam turbine. Meanwhile, the erosion of the saturated steam to the rotor 23 of the steam turbine is prevented.
[0038] In the embodiment, the outer end surface of the flow guiding ring on the front stage partition plate and the inclined wall surface of the rectifying ring on the rear stage partition plate constitute the flow guiding channel 21. The flow guiding channel 21 is a smooth and gradually expanding flow channel. Especially for the saturated steam supplementary steam, the water erosion of the wet steam to the components is reduced.
[0039] In the embodiment, the inner wall surface of the flow guiding ring on the front stage partition plate, the inner wall surface of the rectifying ring on the rear stage partition plate and the outer wall surface of the protective flow guiding ring on the rear stage partition plate constitute the main flow channel 22. The main flow channel 22 is a smooth and gradually expanding main flow channel 22, and the water erosion of the wet steam to the components is reduced.
[0040] In the embodiment, the center line of the main flow channel 22 is arranged to be axially deviated to the outside, the center line of the flow guiding channel 21 and the center line of the main flow channel 22 form an angle of 40°-60°, and the supplementary steam enters the main flow channel 22 at an angle of 40°-60° after entering the flow guiding channel 21.
[0041] The supplementary steam device can be flexibly adjusted according to different parameters, thereby improving the applicability of the steam turbine components. Meanwhile, the uniform supplementary steam in the low parameter and large flow supplementary steam process of the low temperature waste heat steam turbine is realized, the steam driving loss is reduced, the vibration of the steam turbine caused by the irregular water droplets in the supplementary steam is prevented, and the water erosion of the saturated steam to the components of the steam turbine is prevented.
[0042] Embodiment 2:
[0043] Embodiment 2 of the present invention also provides a steam injection method for a high-flow-rate, uniform, and adjustable steam injection device for a low-temperature waste heat steam turbine, using the steam injection device provided in Embodiment 1, and includes the following steps:
[0044] S1. Installation: Select the appropriate rotor 23, front stage partition, rear stage partition, steam injection chamber, and steam injection ring. Set the evenly distributed guide plate 2 on the steam injection pipe port 1 of the steam injection chamber. The steam injection ring of the steam injection chamber is provided with a steam injection ring inlet. The front stage partition and the rear stage partition are both provided with main steam flow channels. The front stage partition is provided with a guide ring, and the rear stage partition is provided with a rectifier ring and a protective guide ring. Complete the integrated installation of all components.
[0045] S2, Start-up: Main steam is introduced into the turbine. The main steam flows sequentially from the main steam flow channels of the front stage diaphragm and the rear stage diaphragm. The supplementary steam flows into the supplementary steam chamber from the supplementary steam pipe 1 and then flows out from the inlet of the supplementary steam ring. The mixing of supplementary steam and main steam is achieved between the guide ring, the rectifier ring, and the protective guide ring.
[0046] S3. Operation and Stop: Adjust the operating parameters of the main steam and the supplementary steam, including the flow rate, to achieve the flow balance of the main steam and the supplementary steam, realize the stable operation of the turbine rotor 23, and make full use of the supplementary steam energy.
[0047] Furthermore, based on the ratio of main steam to supplementary steam flow rate with different parameters and combined with the results of finite element flow field analysis, the inclination angles of the supplementary steam ring inlet and the guide channel 21 are adjusted, and the inlet of the supplementary steam ring, the end face of the guide ring, and the inclined wall of the rectifier ring are processed so that the supplementary steam is uniformly incorporated into the main steam at an angle of 40° to 60° to achieve the best flow effect.
[0048] Furthermore, for low-temperature waste heat supplementary steam, especially when the supplementary steam parameter is saturated steam, in order to avoid excessively fast supplementary steam flow rate, which could lead to water erosion of the main body components and the formation of vortex zones in the guide channel 21, the flow velocity at the supplementary steam inlet 1 is limited to ≤40m / s, and the flow velocity in the guide channel 21 is limited to ≤20m / s.
[0049] In summary, the application realizes efficient recycling of industrial waste heat, through the gradually changing steam supplement chamber and the flow guide channel 21 with an inclined angle, the steam supplement can be uniformly merged into the main flow channel 22 in the circumferential direction, the influence on the main flow is reduced, the steam supplement can also be uniformly entered into the rear stage baffle nozzle, thereby greatly reducing the flow loss and the non-uniform situation of the rear stage steam admission. According to different main flow parameters and steam supplement parameters of the steam turbine, when designing and manufacturing, only the specifications and angles of the steam supplement ring inlet need to be flexibly adjusted according to the flow field analysis results, the parameter adaptability is realized, and the best flow straightening effect is achieved. Especially for the saturated steam supplement in the industrial waste heat, the water erosion of the saturated steam to the steam supplement position cylinder and the baffle can be avoided, the vibration problem caused by the irregular water droplets in the saturated steam uniformly impacting the rotor 23 can be prevented, and the water erosion of the saturated steam to the rotor 23 can also be avoided.
[0050] It should be noted that the above embodiments are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and equivalent transformations made on the basis of the above embodiments all belong to the protection scope of the present application.
Claims
1. A high-flow-rate, uniform, and adjustable steam injection device for a low-temperature waste heat steam turbine, comprising a rotor and a steam injection chamber, characterized in that: The steam injection chamber is located inside the cylinder. The rotor and the steam injection chamber are equipped with a front-stage baffle and a rear-stage baffle. The front-stage baffle is located on the steam inflow side, and the rear-stage baffle is located on the steam outflow side. The steam injection chamber includes a steam injection chamber wall and a steam injection ring. The steam injection chamber wall is provided with a steam injection port. A flow-distributing guide plate is provided on the steam injection port. The steam injection ring is installed on the inner side of the steam injection chamber wall and is located between the front-stage baffle and the rear-stage baffle. The steam injection ring is provided with a steam injection ring inlet. The front-stage baffle is provided with a flow-guiding ring and a front main steam flow channel. The rear-stage baffle is provided with a rectifier ring, a protective flow-guiding ring, and a rear main steam flow channel. The diameter of the rear main steam flow channel is larger than the diameter of the front main steam flow channel. A rapid mixing zone for main steam and steam injection is formed between the rectifier ring, the protective flow-guiding ring, and the flow-guiding ring.
2. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 1, characterized in that: The cylinder includes a lower cylinder and an upper cylinder. The steam injection chamber includes a lower steam injection chamber and an upper steam injection chamber. The lower steam injection chamber and the upper steam injection chamber are respectively installed in the lower cylinder and the upper cylinder. The lower steam injection chamber includes a lower steam injection chamber wall and a lower steam injection ring. The lower steam injection chamber wall is provided with a steam injection port. The lower steam injection ring is installed on the inner side of the lower steam injection chamber wall and is located between the front stage partition and the rear stage partition. The lower steam injection ring is provided with a lower steam injection ring inlet. The upper steam injection chamber includes an upper steam injection chamber wall and an upper steam injection ring. The upper steam injection ring is installed on the inner side of the upper steam injection chamber wall and is located between the front stage partition and the rear stage partition. The upper steam injection ring is provided with an upper steam injection ring inlet.
3. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 2, characterized in that: The injection chamber includes a lower injection chamber and an upper injection chamber. The cross-sectional area of the injection chamber decreases from bottom to top. Let profile II be the inner wall profile of the injection chamber at the lower injection inlet, profile II-II be the inner wall profile of the injection chamber at the middle part of the lower cylinder, profile III-III be the inner wall profile of the injection chamber at the middle part of the upper cylinder, and profile IV-IV be the inner wall profile of the injection chamber at the top of the upper cylinder. Then, profile II has the largest area, profile II-II and profile III-III have the same area, and profile IV-IV has the smallest area.
4. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 3, characterized in that: The pre-stage baffle includes a lower half of the pre-stage baffle and an upper half of the pre-stage baffle. The lower half of the pre-stage baffle is provided with a lower half guide ring and a front main steam flow channel, and the upper half of the pre-stage baffle is provided with an upper half guide ring and a front main steam flow channel.
5. A high-flow-rate, uniform, and adjustable steam replenishment device for a low-temperature waste heat turbine according to claim 4, characterized in that: The downstream baffle includes a lower half and an upper half. The lower half of the downstream baffle is provided with a lower rectifier ring, a lower protective guide ring, and a downstream main steam flow channel. The diameter of the downstream main steam flow channel is larger than that of the upstream main steam flow channel. A rapid mixing zone for main steam and make-up steam is formed between the lower rectifier ring, the lower protective guide ring, and the lower guide ring. The upper half of the downstream baffle is provided with an upper rectifier ring, an upper protective guide ring, and a downstream main steam flow channel. The diameter of the downstream main steam flow channel is larger than that of the upstream main steam flow channel. A rapid mixing zone for main steam and make-up steam is formed between the upper rectifier ring, the upper protective guide ring, and the upper guide ring.
6. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 5, characterized in that: The outer end face of the guide ring on the front stage partition and the inclined wall surface of the rectifier ring on the rear stage partition form a guide channel, which is a smooth, gradually expanding flow channel.
7. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 6, characterized in that: The inner wall surface of the guide ring on the pre-stage partition, the inner wall surface of the rectifier ring on the post-stage partition, and the outer wall surface of the protective guide ring on the post-stage partition constitute the main flow channel, which is a smooth and gradually expanding main flow channel.
8. The adjustable, high-flow-rate, uniform steam replenishment device for a low-temperature waste heat turbine according to claim 7, characterized in that: The centerline of the main channel is set off outward along the axial direction, and the centerline of the guide channel is at an angle of 40° to 60° with the centerline of the main channel. After the supplementary steam enters the guide channel, it flows into the main channel at an angle of 40° to 60°.
9. A method for supplying steam to a low-temperature waste heat steam turbine with a large-flow, uniform, and adjustable steam supply device, characterized in that... Includes the following steps: S1. Installation: Select suitable rotor, front stage partition, rear stage partition, steam injection chamber, and steam injection ring. Install a uniform guide plate on the steam injection pipe inlet of the steam injection chamber. The steam injection ring of the steam injection chamber is provided with a steam injection ring inlet. Both the front stage partition and the rear stage partition are provided with main steam flow channels. The front stage partition is provided with a guide ring, and the rear stage partition is provided with a rectifier ring and a protective guide ring. Complete the integrated installation of all components. S2. Start-up: Main steam is introduced into the turbine. The main steam flows sequentially from the main steam flow channels of the front stage diaphragm and the rear stage diaphragm. The supplementary steam flows into the supplementary steam chamber from the supplementary steam pipe and then flows out from the inlet of the supplementary steam ring. The mixing of supplementary steam and main steam is achieved between the guide ring, the rectifier ring, and the protective guide ring. S3. Operation and Stop: Adjust the operating parameters of the main steam and make-up steam, including flow rate, to achieve flow balance between the main steam and make-up steam, realize stable operation of the turbine rotor, and make full use of the energy of the make-up steam.
10. The steam injection method for a high-flow-rate, uniform, and adjustable steam injection device for a low-temperature waste heat steam turbine according to claim 9, characterized in that: In steps S1 and S2, the inclination angles of the inlet of the steam replenishment ring and the guide channel are adjusted, and the inlet of the steam replenishment ring, the end face of the guide ring, and the inclined wall of the rectifier ring are processed so that the replenished steam is uniformly incorporated into the main steam at an angle of 40° to 60° to achieve the best flow effect.