An efficient and low-vibration pipeline distribution manifold and its control method

Abstract

The present invention relates to an efficient and low-vibration pipeline distribution header and its control method, including a first ring pipe, a second ring pipe, an inlet pipe, a first outlet pipe, a second outlet pipe, a level gauge, a bracket and a valve; the first ring pipe and the second ring pipe can be butted to form an annular fluid channel, and the fluid channel surrounds the outer wall of the scrubbing tower; the inlet pipe is communicated with the first ring pipe, and a water distribution member is arranged on the inner wall of the first ring pipe and at the interface facing the inlet pipe, and the water distribution member is used for evenly dividing the fluid of the inlet pipe; the first outlet pipe and the second outlet pipe are axially arranged on the top of the first ring pipe; the level gauge is arranged on the second ring pipe, and the position of the level gauge and the inlet pipe is symmetrically arranged with respect to the axis of the fluid channel; there are two valves, which are respectively arranged on the first outlet pipe and the second outlet pipe. The present invention solves the problems of large damping and easy vibration in the prior art, which affects the flow splitting effect.

Description

Technical Field

[0001] The invention belongs to the technical field of petrochemical pipelines, and particularly relates to an efficient and low-vibration pipeline distribution manifold and a control method thereof. Background Art

[0002] Catalytic cracking units have always occupied a very large proportion in the field of crude oil processing. Almost every refinery will build one or several catalytic cracking units at the initial stage of construction to process the residual residue of the atmospheric and vacuum distillation units. These units have created very considerable economic benefits for each refinery. With environmental protection being increasingly put on the agenda, the pollution problem of catalytic flue gas has gradually attracted people's attention. Catalytic flue gas desulfurization has become an additional unit that must be considered in catalytic units. Among them, wet flue gas desulfurization is a commonly used method for catalytic flue gas desulfurization. Its main principle is to introduce the flue gas into a scrubbing tower, and fully react with the bottom fluid of the tower in a mixer before entering the tower, perform alkali washing for desulfurization and denitrification. The reacted mixed liquid then enters the scrubbing tower for gas-liquid separation, and the purified flue gas is discharged into the atmosphere. The bottom fluid of the tower can be pumped back to the mixer for recycling. In order to make the reaction more sufficient and the layout more reasonable, the catalytic flue gas generally enters the scrubbing tower in two symmetrically distributed streams. Therefore, it is required that the bottom fluid of the tower must also enter the mixer in two paths. Under normal operating conditions, only one bottom pump is working. Therefore, the process requires special treatment of the fluid before it enters the mixer to make the liquid flow rate into the two mixers roughly equal, the distribution more uniform, avoid occurrence of uneven flow, and make the equipment operate more stably.

[0003] The patent with the publication number CN217784533U proposes a liquid pipeline distribution manifold, including a loop pipe arranged around the scrubbing tower. The loop pipe is fixedly connected by a first loop pipe and a second loop pipe; an inlet nipple is arranged at the bottom of the loop pipe, and two outlet nipples are arranged at the top. The diameter of the inlet nipple is equal to the diameter of the loop pipe, and the diameter of the outlet nipple is smaller than the diameter of the loop pipe. One of the outlet nipples is located on the first loop pipe, and the other outlet nipple is located on the second loop pipe and the two outlet nipples are symmetrically arranged with respect to the inlet nipple; a plurality of brackets are arranged circumferentially at the bottom of the loop pipe. The above technical solution has the following problems: The angle welding between the inlet nipple and the manifold, and between the manifold and the outlet nipple results in a relatively large damping. At the same time, the manifold is subjected to a single vertically upward force at the inlet nipple, and the manifold is prone to vibration, affecting the flow splitting effect of the manifold.

[0004] Therefore, it is urgent to design a new manifold and control method to solve the problems of relatively large damping and easy vibration affecting the flow splitting effect in the prior art. Summary of the Invention

[0005] To solve the problems of the prior art, the invention proposes an efficient and low-vibration pipeline distribution manifold and a control method thereof, which solve the problems of relatively large damping and easy vibration affecting the flow splitting effect in the prior art.

[0006] The object of the present invention and the technical problems to be solved are achieved by the following technical solutions. An efficient and low-vibration pipeline distribution manifold according to the present invention includes a first ring pipe, a second ring pipe, an inlet pipe, a first outlet pipe, a second outlet pipe, a level, a bracket, and a valve; the first ring pipe and the second ring pipe can be butted to form an annular fluid passage, and the fluid passage surrounds the outer wall of the scrubbing tower; the inlet pipe is communicated with the first ring pipe and is arranged along the radial direction of the first ring pipe, the inlet pipe is a bent pipe, and a water distribution member is arranged on the inner wall of the first ring pipe and opposite to the interface of the inlet pipe, and the water distribution member is used for evenly dividing the fluid of the inlet pipe; the first outlet pipe and the second outlet pipe are arranged at the top of the first ring pipe along the axial direction, and the second outlet pipe is symmetrically arranged with the first outlet pipe about the axis of the inlet pipe; the level is arranged on the second ring pipe, and the position of the level is symmetrically arranged with the inlet pipe about the axis of the fluid passage; two valves are provided and are respectively arranged on the first outlet pipe and the second outlet pipe.

[0007] Further, the cross-section of the pipe orifice of the first ring pipe is circular, the cross-section of the pipe orifice of the second ring pipe is one of semi-circular or bow-shaped, sealing plates are arranged at both ends of the first ring pipe, notches are arranged on the sealing plates, and the second ring pipe is communicated with the notches on the sealing plates, so as to form an annular fluid passage.

[0008] Further, transition sections are arranged between the first outlet pipe and the first ring pipe and between the second outlet pipe and the first ring pipe, and the inner arc of the transition section is R 内 , the outer arc of the transition section is R 外 , and R 内 <R 外 .

[0009] Further, the level can be one of a bubble level, a digital level, a laser level, an inclination sensor, or a leveling instrument.

[0010] Further, several brackets are provided and are respectively arranged directly below the inlet pipe, the first outlet pipe, the second outlet pipe, and the level.

[0011] Further, the water distribution member includes a first water distribution plate, a second water distribution plate, and a base, the base is closely attached to the inner wall of the first ring pipe, the first water distribution plate and the second water distribution plate are arranged on the surface of the base, the first water distribution plate and the second water distribution plate are symmetrically arranged, and the cross-sections of the first water distribution plate and the second water distribution plate are streamlined.

[0012] Further, the valve is a proportional valve, the valve includes a first valve and a second valve, the first valve is arranged on the first outlet pipe, and the second valve is arranged on the second outlet pipe.

[0013] Further, a control system is further included, which can control the valve according to the change of the angle of the level.

[0014] A control method for an efficient and low-vibration pipeline distribution manifold, comprising the following steps:

[0015] S1. Use a level to detect whether the second loop of pipes is horizontal, obtain the inclination angle ɑ of the second loop of pipes, and transmit the inclination angle ɑ to the control module;

[0016] S2. The control module receives the inclination angle ɑ. If the inclination angle ɑ = 0, execute step S3; if the inclination angle ɑ ≠ 0, execute step S5;

[0017] S3. Detect the opening degrees C of the first valve and the second valve respectively. If the opening degrees C of the first valve and the second valve are the same, execute step S8; if the opening degrees C of the first valve and the second valve are different, execute step S4;

[0018] S4. If the opening degree C1 of the first valve is less than the opening degree C2 of the second valve, adjust the opening degree C1 of the first valve; if the opening degree C1 of the first valve is greater than the opening degree C2 of the second valve, adjust the opening degree C2 of the second valve, so that the opening degrees C of the first valve and the second valve are the same, and execute step S8;

[0019] S5. If the inclination angle |ɑ| ≤ 0.5°, execute step S6; if the inclination angle |ɑ| > 0.5°, execute step S7;

[0020] S6. Adjust the opening degrees C of the first valve and the second valve so that the flow rates through the first valve and the second valve are the same, and execute step S8;

[0021] S7. Notify the management staff to repair the device, and after the repair is completed, execute step S1;

[0022] S8. The level continuously monitors the inclination angle α of the second loop of pipes and transmits it to the control system. If the inclination angle α remains unchanged continuously, the control system maintains the states of all components; if the inclination angle α changes, return to step S2.

[0023] Further, in step S6, when the inclination angle ɑ is greater than 0 degrees, the relationship among the inclination angle ɑ, the opening degree C1, and the opening degree C2 is:

[0024] C1 = C 01 + k × [ρ × g × R 圆 × (1 - cosα)],

[0025] C2 = C 02 - k × [ρ × g × R 圆 × (1 - cosα);

[0026] Where:

[0027] C 01is the opening degree of the first valve in the initial state;

[0028] C 02 is the opening degree of the second valve in the initial state;

[0029] k is the proportionality coefficient determined through experiments or simulations;

[0030] ρ is the fluid density;

[0031] g is the acceleration due to gravity;

[0032] R 圆 is the radius of the circle in the plane where the two outlets are located.

[0033] In summary, the present invention has the following advantages:

[0034] 1. By changing the vertical setting of the inlet pipe to a radial direction along the first loop pipe, and setting the water distribution member directly opposite the inlet pipe, the first loop pipe is avoided from being impacted in the vertical direction, which helps to optimize the fluid flow path, reduce turbulence and pressure loss. By setting a spirit level and a proportional valve and establishing a reasonable control method, the uneven flow caused by vibration or installation tilt can be compensated by adjusting the valve opening degree, solving the problems of large damping and easy vibration affecting the flow splitting effect in the prior art;

[0035] 2. By setting a water distribution member at the position directly opposite the interface between the inner wall of the first loop pipe and the inlet pipe, the incoming fluid can be effectively and evenly distributed to the entire pipeline system, thereby improving the stability and efficiency of the system;

[0036] 3. By setting the spirit level on the second loop pipe and symmetrically setting it with the position of the inlet pipe, it is convenient for the operator to visually check and adjust the levelness of the manifold, ensuring the installation accuracy, and further reducing the vibration problem caused by tilt.

[0037] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of the manifold of the present invention;

[0039] Figure 2 is a front view of the manifold of the present invention;

[0040] Figure 3 is a schematic structural diagram of the first loop pipe of the present invention;

[0041] Figure 4 is a schematic structural diagram of the second loop pipe of the present invention;

[0042] Figure 5 For the present invention Figure 2 A cross-sectional view along the axial direction of the first outlet pipe at position A in the present invention;

[0043] Figure 6 A schematic structural diagram of the inlet pipe of the present invention;

[0044] Figure 7 A schematic structural diagram of the installation of the deflector group of the present invention.

[0045] Reference numerals: 1, the first ring pipe; 2, the second ring pipe; 3, the inlet pipe; 301, the elbow; 302, the elastic net; 303, the fixing ring; 4, the first outlet pipe; 5, the second outlet pipe; 6, the level; 7, the bracket; 8, the water dividing member; 801, the first water dividing plate; 802, the second water dividing plate; 803, the base; 804, the connecting member; 9, the scrubbing tower; 10, the sealing plate; 11, the notch; 12, the transition section; 13, the valve; 1301, the first valve; 1302, the second valve; 14, the flow equalizing device; 1401, the central axis; 1402, the blade; 15, the deflector group. Detailed implementation manners

[0046] The following further describes the technical solution of the present invention in conjunction with the accompanying drawings and preferred embodiments. It should be noted that all the terms indicating directions and positions in the present invention, such as: "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "bottom", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection situation between components in a specific state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0049] As Figure 1-4 shown, an efficient and low-vibration pipeline distribution header includes a first loop pipe 1, a second loop pipe 2, an inlet pipe 3, a first outlet pipe 4, a second outlet pipe 5, a level 6, a bracket 7, and a valve 13; the first loop pipe 1 and the second loop pipe 2 can be butted to form an annular fluid channel, and the fluid channel surrounds the outer wall of the scrubbing tower 9 with a nominal diameter of DN3000 for the scrubbing tower 9 and a nominal diameter of DN600 for the first loop pipe 1 and the second loop pipe 2; the inlet pipe 3 is connected to the first loop pipe 1 with a nominal diameter of DN600 for the inlet pipe 3 and is arranged radially along the first loop pipe 1. The inlet pipe 3 is a bent pipe, and a water distribution member 8 is provided on the inner wall of the first loop pipe 1 and opposite to the interface of the inlet pipe 3. The water distribution member 8 is used to evenly distribute the fluid of the inlet pipe 3; the first outlet pipe 4 and the second outlet pipe 5 are arranged axially at the top of the first loop pipe 1 with a nominal diameter of DN450 for the first outlet pipe 4 and the second outlet pipe 5, and the second outlet pipe 5 is symmetrically arranged with respect to the axis of the inlet pipe 3 with the first outlet pipe 4; the level 6 is arranged on the second loop pipe 2, and the position of the level 6 is symmetrically arranged with respect to the axis of the fluid channel with the inlet pipe 3; two valves 13 are provided and are respectively arranged on the first outlet pipe 4 and the second outlet pipe 5.

[0050] The inlet pipe 3 is arranged radially along the first loop pipe 1, while the first outlet pipe 4 and the second outlet pipe 5 are arranged axially at the top, which helps to optimize the fluid flow path, reduce turbulence and pressure loss. The water distribution member 8 is arranged at the position on the inner wall of the first loop pipe 1 opposite to the interface of the inlet pipe 3, which can effectively evenly distribute the incoming fluid to the entire pipeline system, avoiding local overload or unevenness, thereby improving the stability and efficiency of the system. The level 6 is arranged on the second loop pipe 2 and is symmetrically arranged with the position of the inlet pipe 3, which is convenient for the operator to visually inspect and adjust the level of the header, ensuring the installation accuracy, and further reducing the vibration problem caused by inclination;

[0051] This setting enables the fluid to be more evenly distributed throughout the pipeline system, reducing the impact and wear caused by local high-flow areas, extending the pipeline lifespan, reducing energy loss, improving the transportation efficiency. The symmetrically arranged level gauges 6 and the inlet and outlet pipes help maintain the mechanical balance of the entire system, further reducing the vibration amplitude during operation. Meanwhile, it is convenient for operators to check the status of the manifold at any time, promptly detect and correct possible installation deviations or deformation problems.

[0052] Specifically, the cross-sectional areas of the orifices of the first loop pipe 1 and the second loop pipe 2 are circular, and the radii of the first loop pipe 1 and the second loop pipe 2 are the same. The flow path of the fluid in the entire system remains consistent, ensuring the uniform distribution of the fluid, reducing the impact and wear caused by local high-flow areas, improving the stability and efficiency of the system. Moreover, since the radii of the first loop pipe 1 and the second loop pipe 2 are the same, a symmetric structural design is formed, enhancing the mechanical balance of the entire system, helping to reduce mechanical vibration, and improving the long-term stability of the system.

[0053] In other embodiments of the present invention, the cross-sectional area of the orifice of the first loop pipe 1 is circular, and the cross-sectional area of the orifice of the second loop pipe 2 can be semi-circular or bow-shaped. Sealing plates 10 are provided at both ends of the first loop pipe 1, and notches 11 are left on the sealing plates 10. The second loop pipe 2 is connected to the notches 11 of the sealing plates 10, thereby forming a continuous fluid channel outside the first loop pipe 1. The fluid can enter the second loop pipe 2 from the inside of the first loop pipe 1 through the notches 11, ensuring the circulation of the fluid throughout the system, being able to fully utilize the equalizing effect of the communicating vessels, while greatly reducing the volume inside the manifold, shortening the initial response time for the manifold to distribute the fluid, and improving the response speed.

[0054] Specifically, the first outlet pipe 4 and the second outlet pipe 5 are arranged adjacent to the second loop pipe 2, which can ensure that the flow rates of the fluid flowing out from the two outlet pipes are more uniform, reducing the problem of uneven flow rates caused by position differences, improving the stability and efficiency of the system. When the control system adjusts the valve opening according to the angle change of the level gauge 6, this layout can respond more quickly and achieve the dynamic balance of the fluid, ensuring that the flow rate of each outlet pipe remains consistent.

[0055] Specifically, the level gauge 6 can be one of a bubble level gauge, a digital level gauge, a laser level gauge, an inclination sensor, or a leveling instrument.

[0056] As Figure 5 shown, there is a smooth transition between the first outlet pipe 4 and the first loop pipe 1, and between the second outlet pipe 5 and the first loop pipe 1. The inner wall arc of the transition section 12 is R 内 , and the outer wall arc of the transition section is R 外 , R 内 < R 外 ;

[0057] The smooth transition design of the transition section 12 enables the fluid to flow along a smoother path when entering the first outlet pipe 4 or the second outlet pipe 5 from the first loop pipe 1, reducing the turbulence caused by sudden changes in direction or speed. This not only reduces energy loss but also improves the overall efficiency of the system. The inner and outer wall arcs R of the transition section 12 内 <R 外 make the transition section form a structure that is thick in the middle and thin on both sides, enabling the transition section 12 to better withstand fluid impact and wear and extend its service life.

[0058] As Figure 6 shown, the inlet pipe 3 includes an elbow 301, an elastic net 302, and fixing rings 303. The two fixing rings 303 are fixedly connected to the inner walls at both ends of the elbow 301. The elastic net 302 is cylindrically placed inside the elbow 301, and there is a certain space between the elastic net 302 and the inner side of the elbow 301, which is the fluid area. The two end faces of the elastic net 302 are fixedly connected to the end faces of the fixing rings 303. Circular inclined holes are evenly distributed on the elastic net 302. The axis of the circular inclined holes forms an acute angle with the elastic net 302, and the size of the circular inclined holes is smaller than the size of the solid particles flowing inside;

[0059] Part of the fluid entering the elbow 301 enters the fluid area through the circular inclined holes at the bend of the elbow 301 to form a fluid cushion. The solid particles carried by the fluid are blocked by the circular inclined holes and impact on the elastic net 302 to absorb kinetic energy. The elastic net 302 that absorbs kinetic energy can change the movement direction of the solid particles and make them impact on the other side and provide the kinetic energy after the direction change to the solid particles. When encountering the solid particles rebounded on the other side, they collide with each other. And the fluid entering the fluid area will form an air cushion surging towards the axis due to the pressure difference between the inlet and the outlet of the elbow 301. The fluid surging towards the axis can carry the solid particles and flow towards the outlet of the elbow;

[0060] At the same time, the inlet section of the inlet pipe 3 is connected to a corrugated pipe to reduce the influence of pipeline vibration on the manifold.

[0061] Specifically, a flow equalizing device 14 is provided on the central axis of the outlet section of the inlet pipe 3. The flow equalizing device 14 includes a central axis 1401 and two vanes 1402. The central axis 1401 of the flow equalizing device 14 is fixedly connected to the water dividing member 8, and the two vanes 1402 are arranged around the central axis 1401 along a spiral line. The rotation angle φ satisfies: 25° ≤ φ ≤ 75°, so that the fluid in the inlet pipe 3 can be divided into two streams of fluid flowing in a spiral direction on the cross-section of the pipe. Through holes are provided on the vanes 1402, and a gap is provided between the two vanes 1402 and the inner wall of the inlet pipe 3, so as to form a void on the cross-section of the inlet pipe 3, so that at least two streams of fluid can flow through the void, so that the two streams of fluid are evenly distributed in the circumferential direction. The radius of the inner wall of the inlet pipe 3 is R, and the cross-sectional area of the inlet pipe 3 is A. On any cross-section, the sum of the unit areas S of the above voids satisfies: S / A = 3 / 4, and the shortest distance D between the void and the axis of the central axis 1401 satisfies: D / R > 1 / 2;

[0062] This setting can effectively guide the fluid to flow along the spiral line, thereby achieving good mixing effect and uniform distribution. On any cross-section, the sum of the unit areas S of the above voids satisfies: S / A = 3 / 4, ensuring sufficient space for the fluid to flow, while retaining a certain blocking effect to guide the fluid to flow along the expected path, avoiding excessive blockage or completely unobstructed situation. The shortest distance D between the void and the axis of the central axis 1401 satisfies: D / R > 1 / 2, ensuring that the void is large enough to avoid excessive resistance to fluid flow, while also ensuring the uniform distribution of the fluid in the radial direction, preventing local high-pressure areas or low-speed areas caused by too small voids, and improving the flow efficiency and stability of the entire system;

[0063] This setting realizes the uniform distribution of the fluid on the cross-section of the pipe, and improves the mixing efficiency of the fluid and the overall performance of the system.

[0064] As Figure 7 shown, a guide vane group 15 is provided at the connection between the inlet pipe 3 and the first loop pipe 1. The two guide vane groups 15 are symmetrically arranged on both sides of the water dividing member 8. The guide vane group 15 is arranged along the fluid movement direction. While realizing the smooth turning of the fluid, the vibration, turbulence and energy loss at the approximate right-angle tee are reduced. The guide vanes of the guide vane group 15 are three, and the three guide vanes are arranged in parallel, reducing the installation difficulty and effectively increasing the energy loss and vibration when the fluid turns.

[0065] Specifically, the bracket 7 can be one of a spring vibration damping bracket, a rigid bracket or a flexible bracket. When using a spring vibration damping bracket, it can effectively absorb the vibration from the pipeline system, reduce the influence on the surrounding structure, extend the equipment life, reduce the wear and fatigue damage caused by vibration, and improve the reliability and safety of the system;

[0066] When using a rigid bracket made of metal or other high-strength materials, which is firmly installed on the support structure by welding, bolts, etc., it can provide strong support force, has extremely high stability, and ensures that the pipeline system can maintain the correct posture under any circumstances;

[0067] When using a flexible bracket made of flexible materials such as rubber or polyurethane and a fixed base, the pipeline is allowed to bend and deform within a certain range, which can effectively absorb vibration and shock, and reduce the damage to the pipeline system;

[0068] The bracket 7 can be respectively arranged below the inlet pipe 3, the first outlet pipe 4, the second outlet pipe 5 and the level gauge 6, which can further reduce the vibration generated by the fluid moving in the inlet pipe 3, the first outlet pipe 4 and the second outlet pipe 5, and avoid affecting the fluid distribution. The bracket 7 below the level gauge 6 provides stable support, ensuring that the level gauge 6 maintains an accurate position during installation and use, and avoiding measurement errors caused by vibration or displacement.

[0069] Such as Figure 1 、 Figure 7 As shown, the water distributor 8 includes a first water distribution plate 801, a second water distribution plate 802 and a base 803. The base 803 is arranged closely against the inner wall of the first ring pipe 1. One side of the base 803 away from the first ring pipe 1 is connected to the first water distribution plate 801 and the second water distribution plate 802. The first water distribution plate 801 and the second water distribution plate 802 are symmetrically arranged, and the cross-sections of the first water distribution plate 801 and the second water distribution plate 802 are streamlined;

[0070] The first water distribution plate 801 and the second water distribution plate 802 are symmetrically arranged to ensure that the incoming fluid can be evenly distributed into the two side pipelines, which helps to maintain the balance of fluid flow, reduce the local overload phenomenon. The base 803 is arranged closely against the inner wall of the first ring pipe 1, which plays a certain supporting and fixing role, and also serves as a buffer zone to absorb part of the kinetic energy, further stabilizing the fluid flow state. The streamlined design can effectively guide the fluid to smoothly transition, reduce turbulence and resistance, enabling the fluid to pass through smoothly with lower pressure loss, improving the efficiency of fluid distribution and reducing energy loss;

[0071] This setting quickly and smoothly disperses the fluid entering at high speed, avoiding the violent pressure fluctuations caused by sudden changes in direction or speed, and significantly reducing the vibration caused by fluid pulsation.

[0072] Specifically, the water distributor 8 can be integrally welded with the first ring pipe 1, or the water distributor 8 further includes a connecting piece 804, and the base 803 is connected to the first ring pipe 1 through the connecting piece 804;

[0073] Directly welding the water dividing member 8 to the inner wall of the first circle of pipes 1 can enhance the integrity and rigidity of the structure, reducing the risk of loosening caused by mechanical vibration. If the base 803 and the first circle of pipes 1 are connected through a specially designed connecting member 804, the water dividing member 8 can be conveniently installed and disassembled, facilitating daily maintenance, cleaning, and component replacement, and improving operational flexibility.

[0074] The connecting member 804 can be a bolt, a screw, or a floating connector, etc. When the connecting member 804 is a bolt, bolts are used to fix the base 803 and the first circle of pipes 1 together. Usually, pre-drilled holes need to be made in the base 803 and the first circle of pipes 1, and corresponding nuts and gaskets are used.

[0075] When the connecting member 804 is a screw, the screw passes through the first circle of pipes 1 and is connected to the threaded holes on the base 803, occupying less space and being easy to install.

[0076] As Figure 2 shown, the valve 13 is a proportional valve. The valve 13 includes a first valve 1301 and a second valve 1302. The first valve 1301 is arranged on the first outlet pipe 4, and the second valve 1302 is arranged on the second outlet pipe 5. The proportional valve can linearly adjust the opening degree according to input signals such as current or voltage, thereby achieving precise control of the fluid flow rate, improving the flexibility and response speed of the system. By integrating with a control system such as a PLC or a DCS, the proportional valve can monitor and adjust the flow rate in real time to ensure that the system is always in the best operating state.

[0077] The first valve 1301 and the second valve 1302 can independently control the flow rates of the first outlet pipe 4 and the second outlet pipe 5 respectively, achieving dynamic balance of the load, avoiding problems such as pressure fluctuations and vibrations caused by uneven flow rates, and quickly reacting when abnormal flow rates or pressures are detected to close or limit the flow rate.

[0078] Specifically, it also includes a control system for controlling the change of the opening degree of the valve 13 according to the angle change of the level 6 to achieve even distribution of the fluid in the manifold.

[0079] During operation, the level 6 monitors the inclination angle of the pipeline system in real time and transmits the data to the control system. The control system receives the data from the level 6 and calculates the opening degrees of the first valve 1301 and the second valve 1302 that need to be adjusted. The control system precisely controls the opening degrees of the two proportional valves through electrical signals or pneumatic signals to ensure uniform distribution of the fluid in the combining pipe.

[0080] By continuously monitoring the angular changes of the level gauge 6, the control system can dynamically adjust the opening degree of the valve 13, ensuring the uniform distribution of the fluid within the combined pipe, avoiding uneven flow caused by inclination. The proportional valve can respond quickly to minute angular changes, maintaining high-precision fluid distribution, thereby enhancing the stability and reliability of the system. Modern control systems usually come with communication interfaces that can be connected to the SCADA system for remote monitoring and fault diagnosis, simplifying the daily maintenance work. The control system can automatically adjust the valve opening according to different working conditions, adapting to complex and changeable working environments, and improving the flexibility and robustness of the system.

[0081] A control method for an efficient and low-vibration pipeline distribution header, comprising the following steps:

[0082] S1: The level gauge 6 detects whether the second loop pipe 2 is horizontal, obtains the inclination angle ɑ of the second loop pipe 2, and transmits the inclination angle ɑ to the control module;

[0083] S2: The control module receives the inclination angle ɑ. If the inclination angle ɑ = 0, execute step S3; if the inclination angle ɑ ≠ 0, execute step S5;

[0084] S3: Detect the opening degrees C of the first valve 1301 and the second valve 1302 respectively. If the opening degrees C of the first valve 1301 and the second valve 1302 are the same, execute step S8; if the opening degrees C of the first valve 1301 and the second valve 1302 are different, execute step S4;

[0085] S4: If the opening degree C1 of the first valve 1301 is less than the opening degree C2 of the second valve 1302, adjust the opening degree C1 of the first valve 1301; if the opening degree C1 of the first valve 1301 is greater than the opening degree C2 of the second valve 1302, adjust the opening degree C2 of the second valve 1302, so that the opening degrees C of the first valve 1301 and the second valve 1302 are the same, and then execute step S8;

[0086] S5: If the inclination angle |ɑ| ≤ 0.5°, execute step S6; if the inclination angle |ɑ| > 0.5°, execute step S7;

[0087] S6: By adjusting the opening degrees of the first valve 1301 and the second valve 1302, make the flow rates through the first valve 1301 and the second valve 1302 the same, and then execute step S8;

[0088] S7: Notify the management staff to repair the device. After the repair is completed, execute step S1;

[0089] S8: The level gauge 6 continuously monitors the inclination angle α of the second loop pipe 2 and transmits it to the control system. If the inclination angle α remains unchanged continuously, the control system maintains the states of all components; if the inclination angle α changes, then return to step S2.

[0090] The inclination is monitored in real time by the spirit level 6, and the valve opening is dynamically adjusted according to the monitoring results, realizing closed-loop control, improving the adaptive ability of the system. Different situations of the inclination of the second lap of pipe 2 and the opening of valve 13 are processed step by step to ensure the stability of the system under various working conditions. For small-angle changes not exceeding 0.5 degrees, the pressure difference is accurately calculated and the valve opening is adjusted to ensure uniform distribution of the fluid, achieving high-precision control. When the inclination exceeds the threshold, the management personnel are notified in time for maintenance to prevent the expansion of potential problems, enhancing the safety of the system. Moreover, the pressure difference is calculated by a specific formula, making the adjustment of the valve opening more scientific and reasonable, improving the accuracy of control. After each adjustment, it returns to step S8 for continuous detection to ensure that the system is always in the optimal state;

[0091] This setting improves the stability and safety of the system, ensures uniform distribution of the fluid in each outlet pipe, avoids problems caused by uneven flow rate, facilitates monitoring and maintenance, and reduces the workload of daily maintenance.

[0092] Specifically, in step S6, when the inclination α is greater than 0 degree, the relationship among the inclination α, the opening C1, and the opening C2 is:

[0093] C1 = C 01 + k × [ρ × g × R 圆 × (1 - cosα)],

[0094] C2 = C 02 - k × [ρ × g × R 圆 × (1 - cosα);

[0095] Where: C 01 is the opening of the first valve 1301 in the initial state;

[0096] C 02 is the opening of the second valve 1302 in the initial state;

[0097] k is the proportionality coefficient determined through experiments or simulations;

[0098] ρ is the fluid density;

[0099] g is the acceleration due to gravity;

[0100] R 圆 is the radius of the circle in the plane where the two outlets are located;

[0101] Specifically, in step S6, when the inclination α is less than 0 degree, the relationship among the inclination α, the opening C1, and the opening C2 is:

[0102] C1 = C 01 - k × [ρ × g × R 圆×(1 - cosα)],

[0103] C2 = C 02 + k × [ρ × g × R 圆 ×(1 - cosα)];

[0104] Where: C 01 is the opening degree of the first valve 1301 in the initial state;

[0105] C 02 is the opening degree of the second valve 1302 in the initial state;

[0106] k is the proportionality coefficient determined through experiments or simulations;

[0107] ρ is the fluid density;

[0108] g is the acceleration due to gravity;

[0109] R 圆 is the radius of the circle in the plane where the two outlets are located.

[0110] In the above relationship, since the two valves are symmetrically arranged in the same plane, when the second loop pipe 2 tilts forward and backward (such as Figure 1 in the up and down direction shown), the heights of the two valves are still on the same horizontal plane, equivalent to the case where the inclination angle α = 0; when the second loop pipe 2 tilts left and right (such as Figure 1 in the left and right direction shown), the heights of the two valves are not on the same horizontal plane. When α is greater than 0, the left valve (the first valve 1301) is higher than the right valve (the second valve 1302), that is, the water outlet of the first outlet pipe 4 is higher than that of the second outlet pipe 5. Due to the property that liquid flows to lower places, the flow rate of the second outlet pipe 5 increases, and it is necessary to increase the flow rate of the first outlet pipe 4 to maintain the flow balance of the two outlet pipes. Since the opening degree of the valve is proportional to the flow rate, it is necessary to increase the opening degree of the first valve 1301, that is, the initial opening degree should be added with the opening degree that needs to be increased. Therefore, when α is greater than 0, C1 = C 01 + k × [ρ × g × R 圆 ×(1 - cosα)], and C2 = C 02 - k × [ρ × g × R 圆 ×(1 - cosα)]. When α is less than 0, the left valve is lower than the right valve, and vice versa.

[0111] The above relationship is derived from the following process: First, calculate the relationship between the inclination angle and the height difference. The relationship between the inclination angle α and the height difference h is: h = R 圆 ×(1 - cos(α)), where R 圆 = 1500 mm is the radius of the annular pipe;

[0112] Then calculate the relationship between the height difference and the pressure difference. According to the hydrostatic principle, the relationship between the height difference h and the pressure difference ΔP is: ΔP = ρ×g×h, where ρ is the fluid density (assuming it is water, ρ = 1000 kg / m 3 ), g is the acceleration due to gravity (g = 9.81 m / s 2 ). Substitute the expression of h into the above formula, then ΔP = ρ×g×R 圆 ×(1 - cos(α));

[0113] Next, calculate the relationship between the pressure difference and the flow rate. According to Bernoulli's equation and the continuity equation, the following relationship exists between the pressure difference ΔP and the flow rate Q: Q = A×v, where A is the cross-sectional area of the pipe and v is the flow velocity. For an incompressible fluid, assuming the change in flow velocity is small, it can be approximately expressed by a linear relationship as ΔP ≈ 1 / 2ρ×(v2 2 - v1 2 ). Simplify to get ΔP ≈ ρ×v×Δv;

[0114] Finally, calculate the relationship between the valve opening and the flow rate. The opening C of the proportional valve is usually expressed as a percentage. Let the maximum flow cross-sectional area be A max , then the actual flow cross-sectional area A can be expressed as A = C×A max , where C is the percentage of the opening, 0 ≤ C ≤ 1. Therefore, the flow rate Q can also be expressed as: Q = C×A max ×v;

[0115] Combining the above formulas, we can obtain the relationship between the inclination α and the valve opening C. Calculate the pressure difference ΔP according to the inclination α: ΔP = ρ×g×R 圆 ×(1 - cos(α)). Then, adjust the valve opening C according to the pressure difference ΔP so that the flow rates of the two outlet pipes tend to be the same. Assume the adjustment ratio is k. When α is greater than 0, then C1 = C 01 + k×ΔP, C2 = C 02 - k×ΔP, where C1 and C2 are the openings of the first valve 1301 and the second valve 1302 respectively, and C 01 and C 02 are the reference openings (i.e., the same openings of the two valves in the ideal state).

[0116] When the pipeline system is tilted, by adjusting the opening degree of valve 13, the uneven flow caused by the tilt can be compensated. Specifically, when α is greater than 0, increase the valve opening degree C1 of the first outlet pipe 4 and decrease the valve opening degree C2 of the second outlet pipe 5, so as to ensure that the flow rates of the two outlet pipes tend to be consistent, improve the stability and reliability of the system. The control system can quickly respond according to the tilt angle α, timely adjust the valve opening degree, reduce the response time, and ensure that the system is always in the optimal state;

[0117] This setting makes the adjustment of the valve opening degree more scientific and reasonable, improves the accuracy of control, can quickly respond when detecting abnormal situations, and reduces the possibility of accidents.

[0118] When the radius R of the plane circle where the two outlets are located 圆 is 1500 mm, the initial opening degrees of the first valve 1301 and the second valve 1302 are both 50%, and the proportionality coefficient k = 0.001 Pa −1 , k represents the response amount corresponding to each unit pressure change, which is determined by experiments or simulations. Since the unit of the calculation in the parentheses after k in the above formula is Pa, and the opening degree C has no unit, the unit needs to be eliminated, that is, k takes 0.001 Pa -1 , so when the inclination degree α = 0.5° detected by the spirit level 6, the fluid density ρ = 1000 kg / m 3 , assuming it is water, and the gravitational acceleration g = 9.81 m / s 2 , then C1 is 50.06% and C2 is 49.94%.

[0119] The above are only the preferred embodiments of the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A control method for an efficient and low-vibration pipeline distribution header, characterized in that: The high-efficiency and low-vibration distribution manifold includes a first loop pipe, a second loop pipe, an inlet pipe, a first outlet pipe, a second outlet pipe, a level gauge, a bracket and a valve; The first loop pipe and the second loop pipe can be butted to form an annular fluid channel, and the fluid channel surrounds the outer wall of the scrubbing tower; The inlet pipe is communicated with the first loop pipe and is arranged along the radial direction of the first loop pipe. The inlet pipe is a bent pipe, and a water distribution member is arranged on the inner wall of the first loop pipe and opposite to the interface of the inlet pipe. The water distribution member is used for evenly dividing the fluid of the inlet pipe; The inlet pipe includes a bent pipe, an elastic net and a fixing ring. Two fixing rings are fixedly connected to the inner walls of both ends of the bent pipe. The elastic net is cylindrically arranged inside the bent pipe, leaving a certain space with the inner side of the bent pipe to form a fluid area. The two end faces of the elastic net are fixedly connected to the end faces of the fixing ring. Circular inclined holes are evenly distributed on the elastic net. The axis of the circular inclined hole forms an acute angle with the elastic net, and the size of the circular inclined hole is smaller than the size of the solid particles flowing inside; A flow equalizing device is arranged on the central axis of the outlet section of the inlet pipe. The flow equalizing device includes a central axis and two blades. The central axis of the flow equalizing device is fixedly connected to the water distribution member, and the two blades are arranged around the central axis along a spiral line, so that the fluid in the inlet pipe can be divided into two fluid flows flowing in a spiral direction on the cross section of the pipe. Through holes are arranged on the blades, and a distance is arranged between the two blades and the inner wall of the inlet pipe, so as to form a gap on the cross section of the inlet pipe, so that at least two fluid flows can flow through the gap, so that the two fluid flows are evenly distributed in the circumferential direction. The radius of the inner wall of the inlet pipe is R, and the cross-sectional area of the inlet pipe is A. On any cross section, the sum of the unit areas S of the above gaps satisfies S / A = 3 / 4, and the shortest distance D between the gap and the axis of the central axis satisfies: D / R > 1 / 2; The first outlet pipe and the second outlet pipe are axially arranged on the top of the first loop pipe, and the second outlet pipe is symmetrically arranged with the first outlet pipe about the axis of the inlet pipe; The level gauge is arranged on the second loop pipe, and the position of the level gauge is symmetrically arranged with the inlet pipe about the axis of the fluid channel; There are two valves. The valves are proportional valves. The valves include a first valve and a second valve. The first valve is arranged on the first outlet pipe, and the second valve is arranged on the second outlet pipe; It further includes a control system, which can control the valves according to the change of the angle of the level gauge; The control method of the high-efficiency and low-vibration pipeline distribution manifold includes the following steps: S1. The level gauge detects whether the second loop pipe is horizontal, obtains the inclination angle ɑ of the second loop pipe, and transmits the inclination angle ɑ to the control system; S2. The control system receives the inclination angle ɑ. If the inclination angle ɑ = 0, step S3 is executed. If the inclination angle ɑ ≠ 0, step S5 is executed; S3. The opening degrees C of the first valve and the second valve are respectively detected. If the opening degrees C of the first valve and the second valve are the same, step S8 is executed. If the opening degrees C of the first valve and the second valve are different, step S4 is executed; S4. If the opening degree C1 of the first valve is less than the opening degree C2 of the second valve, adjust the opening degree C1 of the first valve. If the opening degree C1 of the first valve is greater than the opening degree C2 of the second valve, adjust the opening degree C2 of the second valve so that the opening degrees C of the first valve or the second valve are the same, and execute step S8; S5. If the inclination |ɑ| ≤ 0.5°, execute step S6. If the inclination |ɑ| > 0.5°, execute step S7; S6. Adjust the opening degrees C of the first valve and the second valve. When the inclination ɑ is greater than 0 degrees, the relationship among the inclination ɑ, the opening degree C1, and the opening degree C2 is: C1 = C 01 + k × [ρ × g × R 圆 × (1 - cos α)], C2=C 02 -k×[ρ×g×R 圆 ×(1−cosα)]; When the inclination ɑ is less than 0 degrees, the relationship among the inclination ɑ, the opening degree C1, and the opening degree C2 is: C1 = C 01 -k×[ρ×g×R 圆 ×(1 - cosα)], C2=C 02 +k×[ρ×g×R 圆 ×(1−cosα)]; Where: C 01 is the opening degree of the first valve in the initial state; C 02 is the opening degree of the second valve in the initial state; k is a proportionality coefficient determined through experiments or simulations; ρ is the fluid density; g is the acceleration due to gravity; R 圆 is the radius of the plane circle where the two outlets are located; Make the flow rates through the first valve and the second valve the same, and execute step S8; S7. Notify the management staff to repair the device. After the repair is completed, execute step S1; S8. The level continuously monitors the inclination α of the second loop pipe and transmits it to the control system. If the inclination α remains unchanged continuously, the control system maintains the states of all components. If the inclination α changes, return to step S2.

2. The control method of an efficient and low-vibration pipeline distribution header according to claim 1, characterized in that: The cross-section of the pipe orifice of the first loop pipe is circular. The cross-section of the pipe orifice of the second loop pipe is one of a semi-circular shape or a bow shape. Sealing plates are provided at both ends of the first loop pipe, and notches are provided on the sealing plates. The second loop pipe is connected to the notches on the sealing plates, thereby forming an annular fluid channel.

3. The control method of an efficient and low-vibration pipeline distribution header according to claim 1, characterized in that: There are transition sections both between the first outlet pipe and the first loop pipe and between the second outlet pipe and the first loop pipe. The arc of the inner wall of the transition section is R 内 , and the arc of the outer wall of the transition section is R 外 , and R 内 < R 外 .

4. The control method of an efficient and low-vibration pipeline distribution header according to claim 1, characterized in that: The level can be one of a bubble level, a digital level, a laser level, an inclination sensor, or a leveling instrument.

5. The control method of an efficient and low-vibration pipeline distribution header according to claim 1, characterized in that: Several supports are provided and are respectively arranged directly below the inlet pipe, the first outlet pipe, the second outlet pipe, and the level.

6. The control method of an efficient and low-vibration pipeline distribution header according to claim 1, characterized in that: The water distribution member includes a first water distribution plate, a second water distribution plate, and a base. The base is closely arranged against the inner wall of the first loop pipe. The first water distribution plate and the second water distribution plate are arranged on the surface of the base. The first water distribution plate and the second water distribution plate are symmetrically arranged, and the cross-sections of the first water distribution plate and the second water distribution plate are streamlined.

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