Novel steam mixing adjusting system and adjusting method

Abstract

The invention provides a novel steam mixing adjusting system and method, and the system comprises a low-pressure pipeline which is used for transmitting low-pressure steam, the low-pressure pipeline comprises a first connecting pipe, a temperature mixing pipe and a second connecting pipe which are connected in sequence, and the low-pressure steam flows according to the sequence; the medium-pressure pipeline is used for conveying medium-pressure steam, the medium-pressure pipeline comprises a medium-pressure pipe, a first control valve and a mixing pipe assembly, and the first control valve is arranged on the medium-pressure pipe; the mixing main pipe is connected with the temperature mixing pipe from multiple positions in the radial direction through the multiple mixing branch pipes, and the pressure stabilizing pipeline is installed in the temperature mixing pipe, so that medium-pressure steam discharged from the mixing branch pipes and low-pressure steam flow in the same direction, the contact area of the medium-pressure steam and the low-pressure steam can be effectively increased, the mixing uniformity and the mixing efficiency are improved, and the mixing efficiency is improved. Therefore, the circulating alternating stress of the inner wall of the temperature mixing pipe is reduced, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] This application belongs to the technical field of steam mixing devices, specifically relating to a novel steam mixing and regulating system and method. Background Technology

[0002] With the rapid development of the national economy, the demand for steam parameters in industrial production and residential heating is becoming increasingly diversified. Thermal power plants need to adapt their external steam supply to meet the dual-parameter steam demands of different heat users, requiring both medium-pressure (high temperature, high pressure) and low-pressure (low temperature, low pressure) steam. To meet these demands, existing technologies typically employ a dual-pipeline system for medium-pressure and low-pressure applications, laying steam pipelines along the same route to deliver steam with the corresponding parameters to heat users.

[0003] However, the steam load of heat users often fluctuates significantly. Under low-load operating conditions, the steam temperature at the end of the low-pressure steam pipeline is prone to decay, making it difficult to meet the temperature standards required for user production processes or heating, seriously affecting steam quality and production stability. To solve this problem, steam mixing devices have emerged. Their core function is to mix the higher-temperature medium-pressure steam, after pressure reduction treatment, with the low-temperature, low-pressure steam in the low-pressure steam pipeline to raise the temperature of the low-pressure steam and ensure that the end-user steam parameters meet the standards.

[0004] Currently, the mainstream implementation method of existing steam mixing devices is as follows: medium-pressure steam is sequentially passed through a shut-off valve and a regulating valve for pressure regulation, reducing its pressure to match the steam pressure in the low-pressure steam pipeline. Then, the regulated medium-pressure steam is directly introduced into the mixing section of the low-pressure steam pipeline through a tee fitting, achieving mixing and heating of the two types of steam. To promote uniform steam mixing, the diameter of the existing mixing section pipeline is usually designed to be larger than the diameter of the main low-pressure steam pipeline.

[0005] Although the existing mixing devices can meet the heating requirements of low-pressure steam to a certain extent, they still have significant technical defects and drawbacks in practical applications. Because medium-pressure steam is directly injected into the low-pressure steam pipeline via a tee fitting, the mixing process of the two steams in the mixing section is a sudden, opposing mixing, resulting in severe flow field disturbances, extremely uneven steam temperature distribution, and large temperature gradients. These severe flow field disturbances and temperature abrupt changes generate cyclic alternating stress on the inner wall of the mixing section pipe. Under long-term action, this alternating stress accelerates fatigue damage to the pipe, severely affecting its service life. To resist these cyclic alternating stresses, existing mixing section pipes must be made of specially customized high-strength alloy steel, which not only significantly increases the manufacturing and system construction costs but also increases the difficulty of pipe processing and installation, limiting its widespread application among small and medium-sized heat users. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] To address the aforementioned problems, the first aspect of this application provides a novel steam mixing and regulating system, comprising: A low-pressure pipeline for transmitting low-pressure steam, the low-pressure pipeline comprising a first connecting pipe, a mixing pipe and a second connecting pipe connected in sequence, the low-pressure steam flowing in this order; A medium-pressure pipeline is used to transmit medium-pressure steam. The medium-pressure pipeline includes a medium-pressure pipe, a first control valve, and a mixing pipe assembly. The first control valve is disposed on the medium-pressure pipe and is used to adjust the pressure of the medium-pressure steam entering the medium-pressure pipe to match the pressure of the low-pressure steam. The mixing pipe assembly is connected to the medium-pressure pipe and can send the adjusted medium-pressure steam into the pipe at multiple radial positions along the mixing pipe to mix with the low-pressure steam.

[0008] Optionally, the hybrid tube assembly includes: A mixing main pipe, the first end of which is connected to the medium-pressure pipe, the second end of which is a sealed structure, and the mixing main pipe at least partially surrounds the outer circumference of the mixing pipe; A plurality of mixing branch pipes are disposed between the mixing main pipe and the mixing pipe, and are distributed radially at intervals along the mixing pipe.

[0009] Optionally, the hybrid branch pipe includes: A branch pipe body, the first end of which is connected to the mixing main pipe, and the second end of which extends into the mixing pipe; A pressure stabilizing pipe body is disposed on the second end of the branch pipe body, and the pressure stabilizing pipe body is disposed along the low-pressure steam transmission direction.

[0010] Optionally, the center of each of the voltage regulator tubes is at the same distance from the center of the mixing tube.

[0011] Optionally, the branch pipe body and the mixing pipe are connected by welding.

[0012] Optionally, the number of mixing branch pipes is four, and they are symmetrically arranged in pairs between the mixing main pipe and the mixing pipe.

[0013] Optionally, the first control valve is a regulating valve.

[0014] Optionally, a second control valve may also be included, which is disposed on one side of the first control valve and is a shut-off valve.

[0015] Optionally, a third control valve is provided on the second connecting pipe, and the third control valve is a safety valve.

[0016] A second aspect of this application provides a novel steam mixing and regulating system regulation method, employing the novel steam mixing and regulating system of the first aspect, comprising the following steps: S1. Low-pressure steam is sequentially transported through the first connecting pipe, the mixing pipe and the second connecting pipe; S2. Medium-pressure steam is transported through the medium-pressure pipe, and the pressure of the medium-pressure steam is adjusted to match the pressure of the low-pressure steam through the first control valve; S3. The medium-pressure steam after pressure regulation is first introduced into the mixing main pipe surrounding the outside of the mixing pipe, and then simultaneously fed into the interior of the mixing pipe from multiple radial positions through multiple mixing branch pipes distributed at intervals along the radial direction of the mixing pipe. S4. The medium-pressure steam flows into the low-pressure steam flow through the mixing branch pipe and the pressure stabilizing pipe body arranged in the same direction as the low-pressure steam flow direction. It mixes evenly with the low-pressure steam in the mixing pipe to achieve the heating of the low-pressure steam.

[0017] Beneficial effects The present invention provides a novel steam mixing and regulating system and method. The mixing main pipe is connected to the mixing pipe from multiple radial positions through multiple mixing branch pipes. A pressure stabilizing pipe is installed inside the mixing pipe so that the medium-pressure steam discharged from the mixing branch pipe flows in the same direction as the low-pressure steam. This can effectively increase the contact area between the medium-pressure steam and the low-pressure steam, improve the mixing uniformity and mixing efficiency, avoid drastic temperature changes, thereby reducing the cyclic alternating stress on the inner wall of the mixing pipe and extending the service life of the pipe. Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a second-view structural diagram of the present invention; Figure 3 This is a cross-sectional view of the mixing tube of the present invention; Figure 4 This is a diagram showing the internal structure of the mixing tube of the present invention; Figure 5 This is a flowchart of the present invention.

[0019] The reference numerals in the attached figures are as follows: 1. Low-pressure pipeline; 11. First connecting pipe; 12. Mixing pipe; 13. Second connecting pipe; 2. Medium-pressure pipeline; 21. Medium-pressure pipe; 22. First control valve; 23. Mixing pipe assembly; 231. Mixing main pipe; 232. Mixing branch pipe; 2321. Branch pipe body; 2322. Pressure stabilizing pipe body; 3. Second control valve; 4. Third control valve. Detailed Implementation

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] See also Figure 1-4 As shown, a novel steam mixing and regulating system is provided according to a first aspect embodiment of this application, comprising: Low-pressure pipeline 1 is used to transmit low-pressure steam. The low-pressure pipeline 1 includes a first connecting pipe 11, a mixing pipe 12 and a second connecting pipe 13 connected in sequence, and the low-pressure steam flows in this order. Medium-pressure pipeline 2 is used to transmit medium-pressure steam. The medium-pressure pipeline 2 includes a medium-pressure pipe 21, a first control valve 22, and a mixing pipe assembly 23. The first control valve 22 is disposed on the medium-pressure pipe 21 and is used to adjust the pressure of the medium-pressure steam entering the medium-pressure pipe 21 to match the pressure of the low-pressure steam. The mixing pipe assembly 23 is connected to the medium-pressure pipe 21 and can send the adjusted medium-pressure steam into the pipe at multiple radial positions along the mixing pipe 12 to mix with the low-pressure steam.

[0025] The novel steam mixing and regulating system provided in this application includes a low-pressure pipeline 1 and a medium-pressure pipeline 2. The low-pressure pipeline 1 is used to transmit low-pressure steam and specifically includes a first connecting pipe 11, a mixing pipe 12, and a second connecting pipe 13 connected in sequence. The low-pressure steam flows in the low-pressure pipeline 1 along the sequence of the first connecting pipe 11, the mixing pipe 12, and the second connecting pipe 13. The medium-pressure pipeline 2 is used to transmit medium-pressure steam and includes a medium-pressure pipe 21, a first control valve 22, and a mixing pipe assembly 23. The first control valve 22 is installed on the medium-pressure pipe 21 and is used to regulate the pressure of the medium-pressure steam entering the medium-pressure pipe 21 to match the pressure of the low-pressure steam. The mixing pipe assembly 23 is connected to the medium-pressure pipe 21 and can send the pressure-regulated medium-pressure steam into the pipe at multiple positions radially along the mixing pipe 12, thereby improving the mixing uniformity of the regulated medium-pressure steam and the low-pressure steam and improving the mixing effect.

[0026] Based on this, when a thermal power plant needs to increase the temperature of low-pressure steam to supply steam with different parameters to heat users, the low-pressure steam enters the mixing tube 12 through the first connecting pipe 11. Simultaneously, medium-pressure steam is transported to the first control valve 22 through the medium-pressure pipe 21. After being depressurized and stabilized by the first control valve 22 to match the low-pressure steam pressure, the medium-pressure steam is then fed into the mixing tube 12 at multiple radial positions through the mixing tube assembly 23. This allows the regulated medium-pressure steam and low-pressure steam to mix at multiple points within the mixing tube 12, improving mixing uniformity and completing the temperature increase of the low-pressure steam. Finally, the mixed steam is transported to the heat user through the second connecting pipe 13. In this process, the multi-position radial steam supply of the mixing tube assembly 23 effectively increases the contact area between the medium-pressure steam and low-pressure steam, improving mixing uniformity and efficiency, avoiding drastic temperature changes, thereby reducing the cyclic alternating stress on the inner wall of the mixing tube and extending the service life of the pipeline.

[0027] Understandably, the mixing tube assembly 23 delivers steam at multiple radial positions along the mixing tube 12, increasing the contact area of ​​medium and low-pressure steam. Compared with the traditional three-way mixing method, this makes the mixing process more stable, the temperature change more gradual, and improves the uniformity of the mixing.

[0028] It is understandable that the diameter of the mixing tube 12 is larger than the diameter of the first connecting tube 11 and the second connecting tube 13, in order to mix low-pressure steam and medium-pressure steam, thereby improving the mixing uniformity and mixing efficiency.

[0029] According to some embodiments of this application, the hybrid tube assembly 23 includes: The mixing main pipe 231 has a first end connected to the medium pressure pipe 21 and a second end that is a sealed structure. The mixing main pipe 231 is at least partially surrounding the outer circumference of the mixing pipe 12. Mixing branch pipes 232, a plurality of the mixing branch pipes 232 are disposed between the mixing main pipe 231 and the mixing pipe 12, and are distributed radially at intervals along the mixing pipe 12.

[0030] In this embodiment, the mixing pipe assembly 23 includes a mixing main pipe 231 and a mixing branch pipe 232. The first end of the mixing main pipe 231 is connected to the medium-pressure pipe 21 to receive medium-pressure steam after the pressure is regulated by the first control valve 22. The second end of the mixing main pipe 231 is provided with a sealing structure to prevent the medium-pressure steam from leaking from the end, while allowing the medium-pressure steam to flow along the extension direction of the mixing main pipe 231. Since the mixing main pipe 231 is at least partially surrounding the outer circumference of the mixing pipe 12, it is convenient to install the mixing branch pipe 232 radially along the mixing pipe 12, thereby realizing the subsequent delivery of regulated medium-pressure steam from multiple radial positions of the mixing pipe 12 into its interior, and improving the uniformity of gas mixing.

[0031] Multiple mixing branch pipes 232 are disposed between the mixing main pipe 231 and the mixing thermostat 12, and are distributed radially at intervals along the mixing thermostat 12. These branch pipes 232 serve as channels for transporting medium-pressure steam from the mixing main pipe 231 into the mixing thermostat 12. Based on this, after the medium-pressure steam has been pressurized, it enters the mixing main pipe 231. Due to the seal at the second end of the mixing main pipe 231, the medium-pressure steam is fed along the extension direction of the mixing main pipe 231 into the spaced-apart mixing branch pipes 232, and then simultaneously fed into the mixing thermostat 12 at multiple radial positions through the mixing branch pipes 232, achieving the diversion and transport of medium-pressure steam. This avoids the problems of localized steam concentration and severe turbulence caused by traditional single-path steam supply, and enables stable mixing of medium-pressure steam and low-pressure steam.

[0032] Understandably, the spaced distribution of multiple mixing branch pipes 232 can not only achieve uniform distribution of medium-pressure steam, but also increase the contact area between medium-pressure steam and low-pressure steam, reduce drastic temperature fluctuations during the mixing process, thereby reducing the cyclic alternating stress on the inner wall of the mixing pipe 12 and extending the service life of the pipeline.

[0033] According to some embodiments of this application, the hybrid branch pipe 232 includes: Branch pipe body 2321, the first end of the branch pipe body 2321 is connected to the mixing main pipe 231, and the second end of the branch pipe body 2321 extends into the mixing pipe 12; A pressure stabilizing pipe body 2322 is disposed on the second end of the branch pipe body 2321, and the pressure stabilizing pipe body 2322 is disposed along the low-pressure steam transmission direction.

[0034] In this technical solution, the mixing branch pipe includes a branch pipe body 2321 and a pressure stabilizing pipe body 2322. The first end of the branch pipe body 2321 is connected to the mixing main pipe 231 to receive the medium-pressure steam diverted from the mixing main pipe 231. The second end extends into the mixing tube 12 and is connected to the pressure stabilizing pipe body 2322. The installation direction of the pressure stabilizing pipe body 2322 is the same as the low-pressure steam transmission direction. Based on this, the medium-pressure steam transported to the mixing tube 12 via the branch pipe body 2321 will first flow through the pressure stabilizing pipe body 2322. Under the transport of the pressure stabilizing pipe body 2322, the medium-pressure steam enters the mixing tube 12. Furthermore, the direction of the medium-pressure steam discharged through the pressure stabilizing pipe body 2322 is consistent with the flow direction of the low-pressure steam in the mixing tube 12. This allows the medium-pressure steam to smoothly enter the low-pressure steam flow, achieving co-directional mixing.

[0035] It is understandable that by extending the branch pipe body 2321 into the interior of the mixing tube 12, the impact when medium-pressure steam merges into the low-pressure steam flow is reduced. By setting the pressure stabilizing pipe body 2322 along the low-pressure steam transmission direction, the collision between medium-pressure steam and low-pressure steam in reverse or at an angle can be effectively avoided, further reducing the degree of mixing turbulence. It can also stabilize the outlet flow rate of medium-pressure steam, so that medium-pressure steam mixes with low-pressure steam in a stable state, reducing the drastic temperature fluctuations during the mixing process, thereby reducing the cyclic alternating stress on the inner wall of the mixing tube 12 and extending the service life of the mixing tube 12.

[0036] According to some embodiments of this application, the center distance of each of the voltage regulator tubes 2322 from the center distance of the mixing tube 12 is the same.

[0037] In this technical solution, by setting the center of each pressure stabilizing tube 2322 to be at the same distance from the center of the mixing tube 12, the effect of uniform mixing of medium-pressure steam and low-pressure steam and reduction of mixing turbulence can be further improved.

[0038] Based on this, multiple pressure-stabilizing tubes 2322 are symmetrically distributed in a circular pattern with the center of the mixing tube 12 as the center of symmetry. This allows the medium-pressure steam output from each pressure-stabilizing tube 2322 to simultaneously flow into the low-pressure steam stream from different positions on the same circumferential surface within the mixing tube 12. This ensures that the output positions of multiple medium-pressure steam streams are evenly distributed, avoiding excessive concentration of medium-pressure steam in local areas. At the same time, it ensures that the distance from each medium-pressure steam stream to the center of the mixing tube 12 is consistent, thereby making the contact and mixing process between the medium-pressure steam and the low-pressure steam more balanced. This allows the medium-pressure steam to mix with the low-pressure steam in a symmetrical and stable state, reducing the velocity difference and temperature fluctuation during the mixing process.

[0039] This can further enhance the uniformity of mixing, minimize the cyclic alternating stress on the inner wall of the mixing tube 12, avoid local fatigue damage to the pipeline, and improve the stability of steam mixing.

[0040] According to some embodiments of this application, the branch pipe body 2321 and the mixing pipe 12 are welded together.

[0041] In this technical solution, the branch pipe body 2321 and the mixing pipe 12 are connected by welding, which ensures the sealing of steam transportation, improves structural stability, and avoids steam leakage during mixing. After the second end of the branch pipe body 2321 extends into the mixing pipe 12, its connection with the mixing pipe 12 is fixed by welding, forming a sealed and firm connection structure. This prevents medium-pressure steam from leaking from the connection during transportation and merging, while ensuring that the branch pipe body remains stable under steam impact and pipeline vibration.

[0042] According to some embodiments of this application, the number of mixing branch pipes 232 is four, and they are symmetrically arranged in pairs between the mixing main pipe 231 and the mixing pipe 12.

[0043] In this technical solution, four mixing branch pipes 232 are symmetrically distributed in pairs with the central axis of the mixing tube 12 as the center of symmetry. They are evenly arranged between the mixing main pipe 231 and the mixing tube 12, so that the medium-pressure steam in the mixing main pipe 231 can be evenly distributed to the four mixing branch pipes 232, and then transported to the mixing tube 12 through each mixing branch pipe 232. This achieves the goal of the medium-pressure steam flowing into the low-pressure steam flow from the symmetrical position of the mixing tube 12, thus achieving a balanced mixing effect.

[0044] According to some embodiments of this application, the first control valve 22 is a regulating valve.

[0045] In this technical solution, the first control valve 22 is set as a regulating valve. The regulating valve is used to regulate the pressure of the medium-pressure steam entering the medium-pressure pipe 21, and adjust the pressure of the medium-pressure steam to match the pressure of the low-pressure steam, so that it can be fed into the mixing pipe 12 for mixing through the mixing pipe assembly 23.

[0046] According to some embodiments of this application, a second control valve 3 is also included, which is disposed on one side of the first control valve 22, and the second control valve 3 is a shut-off valve.

[0047] This technical solution also includes a second control valve 3, which is arranged adjacent to the first control valve 22 on the medium-pressure pipe 21. The first control valve 22 is used to adjust the medium-pressure steam pressure to match the low-pressure steam pressure; the second control valve 3 is used to control the on / off flow of medium-pressure steam through the medium-pressure pipe 21. When the system needs to be inspected or maintained, or when abnormal operating conditions occur, the second control valve 3 can be closed to cut off the flow of medium-pressure steam and prevent steam leakage or abnormal flow.

[0048] According to some embodiments of this application, a third control valve 4 is provided on the second connecting pipe 13, and the third control valve 4 is a safety valve.

[0049] In this technical solution, a third control valve 4 is installed on the second connecting pipe 13. The third control valve 4 is a safety valve. The second connecting pipe 13 is used to transport steam after it has been mixed by the mixing pipe 12. When the pressure of the mixed steam rises abnormally and exceeds the preset safety pressure value of the system, the third control valve 4 will automatically open to release pressure and discharge the excess high-pressure steam until the pressure in the low-pressure pipeline 1 drops to a safe range and then automatically closes, thereby realizing automatic pressure regulation and further improving the operational reliability and safety of the system.

[0050] See also Figure 5 As shown, a second aspect of this application provides a novel steam mixing and regulating system regulation method, employing the novel steam mixing and regulating system of the first embodiment, including the following steps: S1. Low-pressure steam is transported sequentially through the first connecting pipe 11, the mixing pipe 12 and the second connecting pipe 13.

[0051] In this technical solution, low-pressure steam is transported sequentially through a first connecting pipe 11, a mixing pipe 12, and a second connecting pipe 13. The diameter of the mixing pipe 12 is larger than the diameter of the first connecting pipe 11 and the second connecting pipe 13. This arrangement allows the flow rate of the low-pressure steam to slow down after entering the mixing pipe 12, providing space for thorough mixing with the medium-pressure steam.

[0052] S2. Medium-pressure steam is transported through the medium-pressure pipe 21, and the pressure of the medium-pressure steam is adjusted to match the pressure of the low-pressure steam through the first control valve 22.

[0053] In this technical solution, medium-pressure steam is transported through medium-pressure pipe 21, and the pressure of medium-pressure steam is adjusted to match the pressure of low-pressure steam through first control valve 22. The pressure adjustment of first control valve 22 can effectively eliminate the pressure difference between medium-pressure steam and low-pressure steam, avoid the situation where the two steam streams mix due to pressure mismatch and generate violent turbulence and impact the inner wall of the pipe, and at the same time ensure that the subsequent medium-pressure steam can smoothly merge into the low-pressure steam flow, prevent pipeline vibration caused by pressure change, and improve the stability of system operation.

[0054] S3. The medium-pressure steam after pressure regulation is first introduced into the mixing main pipe 231 surrounding the outside of the mixing pipe 12, and then simultaneously fed into the interior of the mixing pipe 12 from multiple radial positions through multiple mixing branch pipes 232 distributed radially at intervals along the mixing pipe 12.

[0055] In this technical solution, the medium-pressure steam after pressure regulation is first fed into the mixing main pipe 231 surrounding the outside of the mixing tube 12, and then simultaneously fed into the interior of the mixing tube 12 from multiple radial positions through multiple mixing branch pipes 232 distributed radially at intervals along the mixing tube 12. The mixing main pipe 231 is arranged around the mixing tube 12 to achieve circumferential uniform distribution of the medium-pressure steam. With the multiple mixing branch pipes 232 distributed radially at intervals along the mixing tube 12, the medium-pressure steam is simultaneously fed into the mixing tube 12 from multiple radial positions, which greatly increases the contact area between the medium-pressure steam and the low-pressure steam, improves the mixing uniformity, and at the same time avoids excessive temperature gradient caused by excessively high local steam concentration, reduces heat loss during the mixing process, and improves the mixing efficiency.

[0056] S4. The medium-pressure steam flows into the low-pressure steam flow via the mixing branch pipe 232 and the pressure stabilizing pipe body 2322 arranged in the same direction as the low-pressure steam flow direction. It is uniformly mixed with the low-pressure steam in the mixing pipe 12 to achieve the heating of the low-pressure steam.

[0057] In this technical solution, medium-pressure steam flows into the low-pressure steam flow via the mixing branch pipe 232 and the pressure-stabilizing pipe body 2322, which is set along the flow direction of the low-pressure steam. The medium-pressure steam mixes uniformly with the low-pressure steam within the mixing tube 12, achieving a temperature increase in the low-pressure steam. The pressure-stabilizing pipe body 2322, positioned along the flow direction of the low-pressure steam, allows the medium-pressure steam to flow in the same direction as the low-pressure steam, effectively avoiding steam collisions and turbulence caused by reverse or oblique flow, reducing fluid resistance during mixing. Simultaneously, the center distance between each pressure-stabilizing pipe body 2322 and the center distance between each pressure-stabilizing pipe body 2322 and the center of the mixing tube 12 is the same, ensuring that multiple streams of medium-pressure steam are evenly distributed within the mixing tube 12. This prevents excessively high or low temperatures in localized areas, achieving a stable temperature increase in the low-pressure steam, reducing cyclic alternating stress on the inner wall of the mixing tube 12 caused by drastic temperature fluctuations, and extending the service life of the pipeline. Compared to traditional three-way mixing methods, this solution effectively solves the problems of uneven steam mixing, large temperature fluctuations, and rapid pipeline wear, achieving stable and efficient mixing of medium and low-pressure steam.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A novel steam mixing conditioning system characterized in that, include: A low-pressure pipeline (1) is used to transmit low-pressure steam. The low-pressure pipeline (1) includes a first connecting pipe (11), a mixing pipe (12), and a second connecting pipe (13) connected in sequence, and the low-pressure steam flows in this order. A medium-pressure pipeline (2) is used to transmit medium-pressure steam. The medium-pressure pipeline (2) includes a medium-pressure pipe (21), a first control valve (22), and a mixing pipe assembly (23). The first control valve (22) is installed on the medium-pressure pipe (21) and is used to adjust the pressure of the medium-pressure steam entering the medium-pressure pipe (21) to match the pressure of the low-pressure steam. The mixing pipe assembly (23) is connected to the medium-pressure pipe (21) and can send the adjusted medium-pressure steam into the pipe at multiple radial positions along the mixing pipe (12) to mix with the low-pressure steam.

2. The novel steam mixing and regulating system according to claim 1, characterized in that, The hybrid tube assembly (23) includes: A mixing main pipe (231) is provided, the first end of which is connected to the medium-pressure pipe (21), the second end of which is a sealed structure, and the mixing main pipe (231) is at least partially surrounding the outer circumference of the mixing pipe (12). Mixing branch pipes (232), a plurality of the mixing branch pipes (232) are disposed between the mixing main pipe (231) and the mixing pipe (12), and are distributed radially at intervals along the mixing pipe (12).

3. The novel steam mixing and regulating system according to claim 2, characterized in that, The hybrid branch pipe (232) includes: Branch pipe body (2321), the first end of the branch pipe body (2321) is connected to the mixing main pipe (231), and the second end of the branch pipe body (2321) extends into the mixing pipe (12); A pressure stabilizing pipe body (2322) is disposed on the second end of the branch pipe body (2321) and is disposed along the low-pressure steam transmission direction.

4. The novel steam mixing and regulating system according to claim 3, characterized in that, The center of each of the voltage regulator tubes (2322) is at the same distance from the center of the mixing tube (12).

5. The novel steam mixing and regulating system according to claim 3, characterized in that, The branch pipe body (2321) and the mixing pipe (12) are connected by welding.

6. The novel steam mixing and regulating system according to claim 3, characterized in that, The number of mixing branch pipes (232) is four, and they are symmetrically arranged in pairs between the mixing main pipe (231) and the mixing pipe (12).

7. The novel steam mixing and regulating system according to claim 1, characterized in that, The first control valve (22) is a regulating valve.

8. The novel steam mixing and regulating system according to claim 1, characterized in that, It also includes a second control valve (3), which is located on the side of the first control valve (22) and is a shut-off valve.

9. The novel steam mixing and regulating system according to claim 1, characterized in that, A third control valve (4) is provided on the second connecting pipe (13), and the third control valve (4) is a safety valve.

10. A novel method for regulating a steam mixing and regulating system, characterized in that, The novel steam mixing and regulating system as described in any one of claims 1-9 includes the following steps: S1. Low-pressure steam is transported sequentially through the first connecting pipe (11), the mixing pipe (12), and the second connecting pipe (13); S2. Medium-pressure steam is transported through the medium-pressure pipe (21), and the pressure of the medium-pressure steam is adjusted to match the pressure of the low-pressure steam through the first control valve (22); S3. The medium-pressure steam after pressure regulation is first introduced into the mixing main pipe (231) surrounding the outside of the mixing pipe (12), and then simultaneously fed into the interior of the mixing pipe (12) from multiple radial positions through multiple mixing branch pipes (232) distributed radially along the mixing pipe (12). S4. The medium-pressure steam flows into the low-pressure steam flow through the mixing branch pipe (232) and the pressure stabilizing pipe body (2322) arranged in the direction of the low-pressure steam flow. It is uniformly mixed with the low-pressure steam in the mixing pipe (12) to achieve the heating of the low-pressure steam.

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