A slurry pipeline energy dissipation orifice, system, and method

Abstract

The present application discloses a kind of slurry pipeline energy dissipation orifice plate, including flange assembly, wear-resistant piece, shell and winding gasket;Flange assembly includes two pieces of flange arranged axially symmetric, flange adopts neck butt welding convex surface type, neck is fixedly sealed with slurry pipeline, and the outer periphery of two flanges is connected by fastening connector;Shell and wear-resistant piece are both hollow annular structure, and the section of both is L type, and the middle annular structure with cavity is formed after being combined, and is clamped in the middle by two flanges, and the diameter of the cavity of two flanges is greater than the diameter of the cavity of middle annular structure;Shell has different thickness, aperture and chamfer, and can realize the close assembly with wear-resistant piece;The inner angle of shell is round angle;Winding gasket is circular, and is arranged on the connecting surface of flange and shell, wear-resistant piece;Also disclose corresponding method and system, through energy dissipation main road and energy dissipation bypass, the flexible selection of commonly used energy dissipation system and standby energy dissipation system can be guaranteed;Reduce blockage, improve the wear resistance and service life of system;Meet the stable operation of energy dissipation station under different working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of slurry pipeline technology and equipment, in particular to a slurry pipeline energy dissipation orifice plate and the energy dissipation device used. BACKGROUND

[0002] Slurry pipeline transportation technology is to use water as carrier, and to transport the mined raw ore through pipeline by high-pressure pump relay after washing and selecting or homogenizing treatment, grinding into slurry with suitable particle size grading and concentration. The essence of slurry pipeline transportation technology belongs to a kind of solid-liquid two-phase flow. In the slurry pipeline transportation system, due to the large drop of cross-country pipeline or the change of system operation system, the slurry in the downhill section has residual potential energy in addition to the pipeline resistance, so that the slurry flow in the pipeline is not full. If no measures are taken to eliminate the excess potential energy, the slurry flow speed in the pipeline will gradually accelerate from top to bottom, which is an accelerated flow. The accelerated flow will seriously wear the pipeline, reduce the service life of the pipeline, and cause pipeline cavitation, vibration, merging water hammer and vacuum blockage, etc., which seriously endanger the stable and safe operation of the slurry pipeline transportation system. The present application can prolong the service life of the slurry pipeline transportation system, improve the safety of the system, and reduce the noise in the working environment, which has important significance for green production and efficient production of slurry pipeline. SUMMARY

[0003] In view of the problems or defects in the prior art, the present application aims to solve the problems that the slurry pipeline transportation system in the prior art is prone to accelerated flow, which causes pipeline wear, reduces the service life of the pipeline, and causes pipeline cavitation, vibration, merging water hammer and vacuum blockage.

[0004] In order to achieve the above-mentioned purpose, the present application relates to a slurry pipeline energy dissipation orifice plate, which comprises a flange assembly, a wear-resistant part, a shell and a wound gasket.

[0005] The flange assembly comprises two flanges arranged in axial symmetry, and the flanges are of neck-welded protrusion type, the neck is fixedly and sealingly connected with the slurry pipeline, and the outer periphery of the two flanges is connected by a fastening connecting piece; the shell and the wear-resistant part are both hollow annular structures, and the cross sections of the two are both L-shaped, and the two are combined to form a middle annular structure with a cavity, which is clamped in the middle by the two flanges, and the diameter of the cavity of the two flanges is larger than the diameter of the cavity of the middle annular structure.

[0006] The shell and the wear-resistant part are tightly assembled; the inner corner of the shell is rounded; the service life under vibration conditions can be further improved, and the shell mainly provides support for the wear-resistant part to meet the energy dissipation requirements of the orifice plate in the slurry pipeline transportation system.

[0007] The winding gasket is annular, arranged on the connecting surface of the flange and the shell and the wear-resistant piece, the flange surface has a specific roughness to ensure compatibility with the gasket and achieve high-standard sealing. The winding gasket can further improve the sealing strength of the orifice plate and prevent slurry leakage caused by sealing failure.

[0008] The fastening connector comprises studs penetrating through the surfaces of the two flange plates, the bottoms of the studs are sleeved with hexagonal nuts for locking the two flange plates, and the upper ends of the hexagonal nuts are further provided with flat washers and spring washers.

[0009] Further, the wear-resistant piece has a density greater than 3.05 g / cm 3 , a hardness greater than 2700 HV, and is processed by a process flow of granulation, isostatic pressing forming, sintering and finish machining; the wear-resistant piece is manufactured in an integral manner.

[0010] Further, the wear-resistant piece has different chamfers, thicknesses and hole diameters at different positions in the slurry pipeline.

[0011] As another aspect of the present application, the present application further relates to a slurry pipeline energy dissipation system applying the above-mentioned slurry pipeline energy dissipation orifice plate, which comprises a slurry inlet pipeline assembly, an energy dissipation main pipeline assembly, an energy dissipation bypass pipeline assembly, a post-station pipeline assembly and a slurry storage tank pipeline assembly.

[0012] The slurry inlet pipeline assembly comprises a slurry inlet pipeline, and the slurry inlet pipeline is sequentially provided with a first electric ball valve, a first pressure transmitter and a pig receiving port.

[0013] The energy dissipation main pipeline assembly comprises an energy dissipation main pipeline, one end of the energy dissipation main pipeline is connected to the slurry inlet pipeline between the first pressure transmitter and the pig receiving port, the energy dissipation main pipeline is sequentially provided with a second electric ball valve, at least one fixed energy dissipation orifice plate and at least one energy dissipation ring structure, each energy dissipation ring structure comprises an electric ball valve erected on the energy dissipation main pipeline and a reverse U-shaped energy dissipation ring erected on the energy dissipation main pipeline on both sides of the electric ball valve, the reverse U-shaped energy dissipation ring is provided with an adjustable energy dissipation orifice plate and an adjustable energy dissipation spacer, a pressure transmitter is arranged on the energy dissipation main pipeline at the front end of the reverse U-shaped energy dissipation ring, and an electric ball valve is arranged on the energy dissipation main pipeline at one side of the outlet end of the last energy dissipation ring structure.

[0014] The fixed energy dissipation orifice plate refers to an energy dissipation orifice plate arranged on the horizontal pipeline (non-vertical energy dissipation ring) of the energy dissipation main pipeline and the energy dissipation bypass, the adjustable energy dissipation orifice plate refers to an energy dissipation orifice plate arranged on the reverse U-shaped energy dissipation ring, the structures of the fixed energy dissipation orifice plate and the adjustable energy dissipation orifice plate are the same as those of the slurry pipeline energy dissipation orifice plate, but the chamfers, thicknesses and hole diameters of the wear-resistant pieces of the fixed energy dissipation orifice plate and the adjustable energy dissipation orifice plate at different positions in the slurry pipeline can be the same or different.

[0015] The energy dissipation bypass pipeline assembly comprises an energy dissipation bypass, one end of which is communicated with the front end of the second electric ball valve and the other end of which is communicated with the end of the energy dissipation main line; at least one fixed energy dissipation orifice plate and at least one pressure transmitter are arranged on the energy dissipation bypass, and an electric ball valve is further arranged at the end thereof;

[0016] The post-station pipeline assembly comprises a post-station pipeline, the front end of which is communicated with the end of the energy dissipation main line, and a concentration transmitter and a flow transmitter are arranged on the post-station pipeline; a pressure transmitter is arranged at the rear end of the concentration transmitter and the flow transmitter;

[0017] The slurry tank pipeline assembly comprises a slurry tank pipeline, the front end of which is communicated with the end of the post-station pipeline, and the other end of which is communicated with the slurry tank; an electric knife gate valve is arranged on the slurry tank pipeline.

[0018] Further, the pre-station blasting pipeline assembly is further included, the pre-station blasting pipeline assembly comprises a pre-station blasting pipeline, the front end of the pre-station blasting pipeline is communicated with the pipeline connected to the point before the junction of the energy dissipation main line and the energy dissipation bypass, and the end of the pre-station blasting pipeline is communicated with the slurry tank; a high-pressure manual ball valve and a high-pressure bursting disc are arranged on the pre-station blasting pipeline.

[0019] Further, the post-station blasting pipeline assembly is further included, the post-station blasting pipeline assembly comprises a post-station blasting pipeline, the front end of the post-station blasting pipeline is communicated with the post-station pipeline, and the end of the post-station blasting pipeline is communicated with the slurry tank.

[0020] Further, the dehydration and thickening comprehensive pipeline assembly is further included, the dehydration and thickening comprehensive pipeline assembly comprises a dehydration and thickening comprehensive pipeline, the front end of the dehydration and thickening comprehensive pipeline is communicated with the pipeline connected to the point after the junction of the slurry tank pipeline and the post-station pipeline, and an electric knife gate valve is arranged on the dehydration and thickening comprehensive pipeline.

[0021] Further, the flushing water pipeline assembly is further included, the flushing water pipeline assembly comprises a flushing water pump and a flushing water pipeline connected to the output end of the flushing water pump; the flushing water pipeline is communicated with the energy dissipation main line, the post-station pipeline, the pre-station blasting pipeline arranged at the front end of the energy dissipation main line and the post-station blasting pipeline arranged at the rear end of the post-station pipeline through different branch pipelines, and an electric knife gate valve is arranged on each of the different branch pipelines.

[0022] Further, the fixed energy dissipation orifice plate and the adjustable energy dissipation orifice plate use the following formula to calculate the energy dissipation pressure drop head Δp:

[0023]

[0024] k = f (β, α, γ, R e )

[0025] The total pressure drop of the elimination: P 总 = A * Δp1 + B * Δp2 +... + N * Δp n

[0026] In the above formula: P 总 - total pressure drop elimination, mH2O;

[0027] where Δp1, Δp2,..., Δp n is the elimination pressure drop of the energy dissipation orifice plate with different size parameters in the pipeline, A, B,..., N is the arrangement number of the energy dissipation orifice plate with different size parameters respectively;

[0028] In the above formula: Δp - energy dissipation pressure head, mH2O; ρ - slurry density, m 3 / h; k - energy dissipation coefficient; v - slurry flow rate in the pipeline, m / s; α - thickness-diameter ratio; β - orifice diameter ratio; γ - angle-diameter ratio; R e - Reynolds number; the energy dissipation coefficient k is a function of the thickness-diameter ratio α, the orifice diameter ratio β, the angle-diameter ratio γ and the Reynolds number, and the function relationship is established through fluid mechanics and test fitting, and the specific method is as follows:

[0029] Through experiments, the data of energy dissipation pressure head Δp and flow rate v under different conditions, i.e., different locations, chamfer, thickness, orifice diameter and Reynolds number of the wear-resistant part, are collected, and the experimental data are used to fit the energy dissipation coefficient k; based on the fitting result, a mathematical model is established to describe the calculation method of k and additional experimental data is used to verify the accuracy of the model.

[0030] Further, the energy dissipation coefficient k is calculated by the following formula:

[0031]

[0032] C0, C1, C2, C3 are correction coefficients obtained by fitting experimental data.

[0033] ΔT is the temperature change amount, relative to the standard operating temperature;

[0034] Δρ is the slurry density change amount, relative to the standard operating density;

[0035] Δμ is the slurry dynamic viscosity change amount, relative to the standard operating viscosity;

[0036] is the basic energy dissipation coefficient, indicating the relationship between the energy dissipation coefficient and the orifice diameter ratio, the thickness-diameter ratio, the angle-diameter ratio and the Reynolds number under the standard operating conditions; are the temperature correction term, the density correction term and the viscosity correction term respectively.

[0037] As another aspect of the present application, it also relates to an energy dissipation method of a slurry pipeline energy dissipation system, comprising the following steps:

[0038] Step 1: Install multiple energy dissipation orifice plates on the main energy dissipation or bypass of the slurry conveying pipeline;

[0039] Step 2: Based on the operating parameters of the slurry delivery system, including slurry density, flow rate, and concentration, select an energy dissipation orifice plate for the slurry pipeline with appropriate shape parameters, including aperture ratio β, thickness-to-diameter ratio α, and angle-to-diameter ratio γ.

[0040] Step 3: Control the flow direction of the slurry through the electric ball valve, so that the slurry passes through the main energy dissipation path or the energy dissipation bypass path, and then passes through the energy dissipation orifice plate of the slurry pipeline for energy dissipation;

[0041] Step 4: Use a pressure transmitter to monitor the pressure change before and after energy dissipation, and use a concentration transmitter and a flow transmitter to monitor the concentration and flow rate of the slurry;

[0042] Step 5: Based on the monitoring data, adjust the position of the adjustable energy dissipation orifice plate or replace it with an energy dissipation orifice plate of different shape parameters to adapt to different working conditions.

[0043] Step 6: If necessary, flush the energy dissipation plate through the flushing water pipe to prevent blockage;

[0044] Step 7: When overhauling or replacing the energy dissipation orifice plate, control the slurry flow direction through an electric knife gate valve to ensure safe operation.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] (1) The energy dissipation orifice plate and system of the slurry pipeline of the present invention can ensure the flexible selection of the commonly used energy dissipation system and the backup energy dissipation system through the energy dissipation main road and the energy dissipation bypass.

[0047] (2) The slurry pipeline energy dissipation orifice plate and system of the present invention can avoid the blockage of the energy dissipation device through the flushing water system, and can monitor the stable operation of the slurry conveying system in real time and provide real-time data support for the operation of the energy dissipation station through the pressure transmitter, concentration transmitter and flow transmitter.

[0048] (3) The energy dissipation orifice plate and system for slurry pipelines of the present invention uses silicon carbide wear-resistant material with a density greater than 3.05 g / cm³ inside the energy dissipation orifice plate. 3 With a hardness greater than 2700HV, it improves the wear resistance and service life of the system by eliminating the accelerated flow in the slurry conveying system.

[0049] (4) The energy dissipation orifice plate and system of the slurry pipeline of the present invention are designed with reasonable thickness, orifice diameter and chamfer based on the hydraulic model of energy dissipation of slurry pipeline. The specific thickness, orifice diameter and chamfer values ​​effectively ensure the stable operation of the slurry conveying system under various working conditions such as slurry conveying, water conveying, slurry-water switching and changes in flow rate and concentration.

[0050] (5) The pulp pipeline energy dissipation orifice plate and system of the present application can meet the stable operation of the energy dissipation station under different working conditions through the input or cut-out of the adjustable energy dissipation orifice plate, the fixed energy dissipation orifice plate and the energy dissipation empty device; effectively solve the accelerated flow problem of the large-drop pulp conveying pipeline, reduce the pipeline cavitation, vibration, merging water hammer and vacuum blockage and the like, and ensure the stable and safe operation of the pulp conveying system. BRIEF DESCRIPTION OF DRAWINGS

[0051] Fig. 1 is the cross-sectional view of the pulp pipeline energy dissipation orifice plate according to the preferred embodiment of the present application;

[0052] Fig. 2 is the three-dimensional structure diagram of the pulp pipeline energy dissipation orifice plate according to the preferred embodiment of the present application;

[0053] Fig. 3 is the cross-sectional structure diagram of the wear-resistant part in the pulp pipeline energy dissipation orifice plate according to the preferred embodiment of the present application;

[0054] Fig. 4 is the three-dimensional structure diagram of the energy dissipation device according to the preferred embodiment of the present application;

[0055] Fig. 5 is the top view of the energy dissipation device according to the preferred embodiment of the present application;

[0056] Fig. 6 is the front view of the first energy dissipation ring of the energy dissipation device according to the preferred embodiment of the present application.

[0057] In the figure: 11-first fixed energy dissipation orifice plate, 12-first adjustable energy dissipation orifice plate, 13-second adjustable energy dissipation empty device, 14-second fixed energy dissipation orifice plate, 15-third fixed energy dissipation orifice plate, 16-fourth fixed energy dissipation orifice plate, 17-first adjustable energy dissipation empty device, 18-second adjustable energy dissipation empty device;

[0058] 21-first electric ball valve, 22-second electric ball valve, 23-third electric ball valve, 24-fourth electric ball valve, 25-fifth electric ball valve, 26-sixth electric ball valve, 27-seventh electric ball valve;

[0059] 31-first pressure transmitter, 32-second pressure transmitter, 33-third pressure transmitter, 34-fourth pressure transmitter, 35-fifth pressure transmitter, 36-sixth pressure transmitter;

[0060] 41-high pressure manual ball valve, 42-low pressure manual ball valve;

[0061] 51-high pressure bursting disc, 52-low pressure bursting disc;

[0062] 61 - first electric knife gate valve, 62 - second electric knife gate valve, 63 - third electric knife gate valve, 64 - fourth electric knife gate valve, 65 - fifth electric knife gate valve, 66 - sixth electric knife gate valve, 67 - seventh electric knife gate valve;

[0063] 71 - slurry storage tank, 72 - tank ladder, 73 - agitator;

[0064] 8 - flush water pump;

[0065] 91 - concentration transmitter, 92 - flow transmitter;

[0066] 101 - incoming slurry line, 102 - pig receiving port, 103 - energy dissipation bypass, 104 - energy dissipation main line, 105 - post-station line, 106 - dewatering-thickening integrated line, 107 - slurry storage tank line, 108 - pre-station burst line, 109 - post-station burst line, 110 - flush water line;

[0067] 1001 - flange, 1002 - wear part, 1003 - stud, 1004 - housing, 1005 - flat washer, 1006 - hex nut, 1007 - wound gasket, 1008 - spring washer. Wherein 1021 is the chamfer of wear part 1002, 1022 is the thickness of wear part 1002, 1023 is the hole diameter of wear part 1002. DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0069] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0070] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0071] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0072] To solve the problem of slurry pipeline acceleration flow prevention in the prior art, the application provides a slurry pipeline energy dissipation orifice plate and an energy dissipation device used by the slurry pipeline energy dissipation orifice plate.

[0073] Embodiment 1

[0074] Please refer to Figs. 1-3 The embodiment relates to a slurry pipeline energy dissipation orifice plate, which comprises a flange 1001, a wear-resistant part 1002, a stud 1003, a shell 1004, a flat washer 1005, a hexagonal nut 1006, a wound gasket 1007 and a spring washer 1008. The energy dissipation orifice plate is installed in the inside of a slurry conveying pipeline, and is mainly used for preventing the occurrence of acceleration flow in a pipeline conveying solid-liquid two-phase flow such as coal and iron concentrate, so as to avoid the harm of the acceleration flow to the stability of the slurry conveying system.

[0075] The flange 1001 comprises two upper and lower pieces, and the flange adopts a necked butt-welded protruding surface type. The neck part is connected with the pipeline in a welding mode. The connection of the necked butt-welded flange is not easy to deform, and the sealing effect is good.

[0076] The wound gasket 1007 is circular and is arranged on the sealing surface of the flange and located at the connecting surface of the flange 1001 and the shell 1004 and the wear-resistant part 1002. The flange surface has a specific roughness to ensure compatibility with the gasket and achieve high-standard sealing. The wound gasket can further improve the sealing strength of the orifice plate and prevent slurry leakage caused by sealing failure.

[0077] The core components of the slurry pipeline energy dissipation orifice plate mainly comprise the wear-resistant part 1002 and the shell 1004.

[0078] The wear-resistant part 1002 is made of wear-resistant material, and is generally made of silicon carbide in the field of metal ore slurry such as iron concentrate. The wear-resistant part has the advantages of high hardness, strong wear resistance and good stability. The density of the wear-resistant part is greater than 3.05 g / cm 3 , and the hardness is greater than 2700 HV. When the wear-resistant part is manufactured, it is necessary to ensure that the wear-resistant part material is free of cracks, cavities and deformities.

[0079] The wear-resistant part has different chamfers 1021, thicknesses 1022 and hole diameters 1023. The specific chamfers 1021, thicknesses 1022 and hole diameters 1023 are determined through a slurry pipeline energy dissipation hydraulic model calculation, and the main function is to meet the requirements of different line drops, different weight concentrations and different working conditions (slurry conveying, water conveying, slurry pushing water and water pushing slurry, etc.).

[0080] Specifically, the hole diameter ratio of the wear-resistant part is The hole diameter ratio beta, the thickness-diameter ratio alpha and the angle-diameter ratio gamma are key size parameters for determining the energy dissipation slurry head of the orifice plate, and need to be determined according to the actual engineering situation and the energy dissipation hydraulic model.

[0081] The wear-resistant part 1002 is integrally manufactured through the process flow of granulation, isostatic pressing, sintering and finish machining, and the strict manufacturing process is mainly to improve the performance and quality of the product, thereby improving the service life of the orifice plate in the slurry conveying system.

[0082] The shell 1004 is made of 316 stainless steel or stainless steel with better performance than 316, and is manufactured by turning on the basis of integral forging. The shell 1004 has different thicknesses, hole diameters and chamfers, and can realize close assembly with the wear-resistant part 1002. The inner corner of the shell 1004 is a fillet, which can further improve the service life of the orifice plate under vibration conditions. The shell 1004 mainly provides support for the wear-resistant part 1002 to meet the energy dissipation requirements of the orifice plate in the slurry conveying system.

[0083] The core components of the slurry pipeline energy dissipation orifice plate, the wear-resistant part 1002 and the shell 1004, are bonded by strong industrial adhesive and clamped by the flange holder to ensure the close connection of the wear-resistant part and the shell of the orifice plate, so that the orifice plate cannot fall off under harsh working conditions.

[0084] As a preferred scheme, the fastening connection of the slurry pipeline single-hole energy dissipation orifice plate includes a stud 1003, a flat washer 1005, a hex nut 1006 and a spring washer 1008.

[0085] The stud 1003 and the hex nut 1006 are used to connect two flanges 1001, the number and type are determined by the standard, the spring washer 1008 plays a role in increasing the friction between the nut 1006 and the bolt 1003 to prevent the nut 1006 from falling off. The number of nuts 1006 and bolts 1003 is matched, and the type is determined by the specification standard.

[0086] The energy dissipation device composed of the above-mentioned slurry pipeline energy dissipation orifice plate is described in detail as follows.

[0087] Please refer to Figs. 4-6 , as another aspect of the embodiment of the present application, also relates to an energy dissipation device mainly comprising slurry pipeline energy dissipation orifice plates arranged at different positions, electric ball valves 2, pressure transmitters 3, manual ball valves 4, bursting discs 5, electric knife gate valves 6, slurry storage tanks 7, flushing water pumps 8, concentration transmitters 91, flow transmitters 92, pipeline fittings 10 and the like.

[0088] The slurry pipeline 101 is connected to the head station to supply slurry, and the slurry is sent into the energy dissipation station through the first electric ball valve 21 at the entrance of the energy dissipation station. The first electric ball valve 21 is the total control valve of the energy dissipation station, which is used to open or close the line passage. The energy dissipation station is provided with an energy dissipation main line 104 and an energy dissipation bypass line 103. A first pressure transmitter 31 is arranged after the first electric ball valve 21 of the energy dissipation station, which is used to monitor the slurry pressure of the line pipeline. At the same time, a pre-station bursting pipeline 108 and a flushing water pipeline are arranged at the entrance of the energy dissipation station.

[0089] The energy dissipation main road 104 is the main energy dissipation and flow channel after the pulp is fed into the head station. The energy dissipation main road 104 is connected to the first electric ball valve 21 at the inlet, connected to the second electric ball valve 22 at the outlet of the energy dissipation main road, passes through the first fixed energy dissipation orifice plate 11, and the second pressure transmitter 32 is arranged behind the first fixed energy dissipation orifice plate 11. The other end of the second pressure transmitter 32 is connected to the first energy dissipation ring of the energy dissipation main road 104. The first adjustable energy dissipation orifice plate 12 and the first adjustable energy dissipation blanker 17 (the energy dissipation blanker is a structure reserved for the installation of the pulp pipe energy dissipation orifice plate later) are arranged on the vertical energy dissipation ring. The third electric ball valve 23 is used to control the opening and closing of the bypass flow passage at the bottom of the first energy dissipation ring.

[0090] The energy dissipation ring is further described. Taking the first energy dissipation ring as an example, the energy dissipation ring is vertically arranged. The top of the energy dissipation ring is a 180° elbow pipe. The elbow pipe is connected to the vertical steel pipe through flanges. The first adjustable energy dissipation orifice plate 12 and the first adjustable energy dissipation blanker 17 are arranged on the vertical steel pipe. When the third electric ball valve 23 at the bottom of the first energy dissipation ring is opened, the pulp does not enter the first energy dissipation ring, that is, the pulp does not pass through the first adjustable energy dissipation orifice plate 12 and the first adjustable energy dissipation blanker 17. At this time, the first energy dissipation ring is in a cut-out state and does not participate in energy dissipation. Conversely, when the third electric ball valve 23 at the bottom of the first energy dissipation ring is closed, the first energy dissipation ring is in a put-in state and participates in energy dissipation.

[0091] The other end of the first energy dissipation ring is connected to the third pressure transmitter 33. The other end of the third pressure transmitter 33 is connected to the second energy dissipation ring. The second energy dissipation ring has the same style and function as the first energy dissipation ring, which will not be described here. Different orifice plates on the energy dissipation ring have different body parameters (orifice diameter ratio β, thickness-diameter ratio α, and angle-diameter ratio γ). The orifice plate blanker reserves the orifice plate installation position. Different orifice plates can be installed according to the needs of the project to further increase the energy adjustment range of the energy dissipation device. According to different flow rates and concentrations, the first energy dissipation ring or the second energy dissipation ring can be withdrawn or put in to achieve the purpose of eliminating different energy,

[0092] The second energy dissipation ring is connected to the fifth electric ball valve 25 downstream. The other end of the fifth electric ball valve 25 is connected to the energy dissipation bypass 103.

[0093] It should be noted that the energy dissipation bypass 103 is a backup pulp energy dissipation and flow channel. When the energy dissipation main road equipment is overhauled or replaced, the sixth electric ball valve 26 is opened, the second electric ball valve 22 is closed, and the pulp is cut into the energy dissipation bypass 103.

[0094] The energy dissipation bypass 103 is connected to the pipeline upstream of the second electric ball valve 22 from the energy dissipation main line 104, and the sixth electric ball valve 26 is arranged at the inlet of the energy dissipation bypass 103, and the other side of the sixth electric ball valve 26 is connected with the second fixed energy dissipation orifice plate 14, and the downstream of the fourth pressure transmitter 34. The other side of the fourth pressure transmitter 34 is provided with the third fixed energy dissipation orifice plate 15, and the downstream of the third fixed energy dissipation orifice plate 15 is the fifth pressure transmitter 35, and the downstream of the fifth pressure transmitter 35 is the fourth fixed energy dissipation orifice plate 16, and the downstream of the seventh electric ball valve 27 is connected with the downstream pipeline of the fifth electric ball valve 25 of the energy dissipation main line 103.

[0095] After the energy dissipation main line 104 and the energy dissipation bypass 103 are combined, the downstream is provided with a concentration transmitter 91 and a flow transmitter 92, and the concentration is used to monitor the concentration of the slurry pipeline, especially in the slurry water switching working condition, and the flow transmitter is used to monitor the flow change of the slurry pipeline. The other side of the concentration transmitter 91 is provided with the sixth pressure transmitter 36, and the downstream of the sixth pressure transmitter 36 is provided with the flow transmitter 92, and the other side of the flow transmitter 92 is the station post-blast pipeline 109, the slurry tank pipeline 107 and the dehydration-thickening comprehensive pipeline 106.

[0096] The station pre-blast pipeline 108 is connected from the point before the combination of the energy dissipation main line 104 and the energy dissipation bypass 103, and the station pre-blast pipeline 108 is provided with a high-pressure manual ball valve 41, and the other side of the high-pressure manual ball valve 41 is provided with a high-pressure burst disc 51, which can realize the overall overpressure protection of the energy dissipation device, and the station pre-blast pipeline 108 goes to the slurry tank 71.

[0097] The station post-blast pipeline 109 is connected from the point after the combination of the energy dissipation main line 104 and the energy dissipation bypass 103, and the station post-blast pipeline 109 is provided with a low-pressure manual ball valve 42, and the other side of the low-pressure manual ball valve 42 is provided with a low-pressure burst disc 52, which can realize the overpressure protection of the station post equipment, and the station post-blast pipeline 109 goes to the slurry tank 71.

[0098] The slurry tank pipeline 107 is connected from the pipeline after the combination of the energy dissipation main line 104 and the energy dissipation bypass 103, and an electric knife gate valve 67 is used to control the opening and closing of the pipeline flow passage at the inlet of the slurry tank pipeline 107, and the slurry flows to the slurry tank 71 through the slurry tank pipeline 107, realizing the function of slurry storage.

[0099] The dehydration-thickening comprehensive pipeline 106 is connected from the pipeline after the combination of the energy dissipation main line 104 and the energy dissipation bypass 103, and an electric knife gate valve 66 is used to control the opening and closing of the pipeline flow passage at the inlet of the dehydration-thickening comprehensive pipeline 106, and the slurry of the dehydration-thickening comprehensive pipeline 106 flows to the dehydration workshop or the thickener, and goes to the dehydration workshop mainly for slurry dehydration, and goes to the thickener when the slurry needs to be thickened.

[0100] The flushing water pipeline comprises a flushing water pump 8 and electric knife gate valves 61, 62, 64 and 65, the flushing water pump 8 draws industrial water from the pipeline network in the field station, when the system is parked, the electric knife gate valves corresponding to the point positions are opened, and the flushing operation of the energy dissipation station pipeline is completed.

[0101] The pig receiving port 102 is a flange-shaped interface, and is used for receiving the pig ball from the pipeline.

[0102] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: the inside of the energy dissipation orifice plate 1 is made of silicon carbide wear-resistant material, which greatly improves the wear resistance and service life of the system on the basis of eliminating the accelerated flow of the slurry conveying system. The reasonable thickness 1022, hole diameter 1023 and chamfer 1024 effectively ensure the stable operation of the slurry conveying system under various working conditions such as slurry conveying, water conveying, slurry-water switching and flow and concentration changes. The overall layout of the energy dissipation device can ensure the flexible selection of the commonly used energy dissipation system and the standby energy dissipation system through the energy dissipation main road 104 and the energy dissipation bypass 103, can avoid the blockage of the energy dissipation device through the flushing water system, can monitor the stable operation of the slurry conveying system in real time through the pressure transmitter 3, the concentration transmitter 91 and the flow transmitter 92, and can provide real-time data support for the operation of the energy dissipation station, and can meet the stable operation of the energy dissipation station under different working conditions through the input or output of the adjustable energy dissipation orifice plate, the fixed energy dissipation orifice plate and the energy dissipation idler. A kind of slurry pipeline energy dissipation orifice plate and the energy dissipation device used can eliminate the accelerated flow problem of large drop slurry conveying pipeline, eliminate pipeline cavitation, vibration, coalescence water hammer and vacuum blockage, etc., and ensure the stable and safe operation of slurry conveying system.

[0103] As another aspect of the embodiments of the present application, a method for determining the energy dissipation pressure drop head Δp of a fixed energy dissipation orifice plate or an adjustable energy dissipation orifice plate is also involved.

[0104]

[0105] k=f(beta,alpha,gamma,R e )

[0106] The total pressure drop P 总 = A*Delta p1 + B*Delta p2 +...+ N*Delta p n

[0107] In the above formula, P 总 is the total pressure drop, mH2O;

[0108] Wherein, Delta p1, Delta p2,..., Delta p n is the pressure drop of the energy dissipation orifice plate with different body parameters in the pipeline, A, B,..., N is the arrangement number corresponding to each of the energy dissipation orifice plates with different body parameters;

[0109] In the above formula: Δp - energy dissipation pressure drop head, m H2O; p - slurry density, m 3 / h; k - energy dissipation coefficient; v - slurry flow rate in the pipeline, m / s; a - thickness-diameter ratio; β - hole-diameter ratio; γ - angle-diameter ratio; R e - Reynolds number; the energy dissipation coefficient k is a function of the thickness-diameter ratio a, the hole-diameter ratio β, the angle-diameter ratio γ and the Reynolds number, and the functional relationship is established through fluid mechanics and experimental fitting, and the specific method is as follows:

[0110] Through experiments, the data of energy dissipation pressure drop head Δp and flow rate v under different conditions, i.e. different locations, chamfer, thickness, hole diameter and Reynolds number of the wear-resistant part, are collected, and the experimental data are used to fit the energy dissipation coefficient k; based on the fitting results, a mathematical model is established to describe the calculation method of k and additional experimental data are used to verify the accuracy of the model.

[0111] The energy dissipation coefficient k is calculated by the following formula:

[0112]

[0113] C0, C1, C2, C3 are correction coefficients obtained by fitting experimental data;

[0114] ΔT is the temperature change, relative to the standard operating temperature;

[0115] Δp is the slurry density change, relative to the standard operating density;

[0116] Δμ is the slurry dynamic viscosity change, relative to the standard operating viscosity;

[0117] is the basic energy dissipation coefficient, indicating the relationship between the energy dissipation coefficient and the hole-diameter ratio, the thickness-diameter ratio, the angle-diameter ratio and the Reynolds number under standard operating conditions; are the temperature correction term, the density correction term and the viscosity correction term, respectively.

[0118] Another aspect of the application embodiment also relates to an energy dissipation method of a slurry pipeline energy dissipation system, comprising the following steps:

[0119] Step one: install a plurality of slurry pipeline energy dissipation orifice plates on the energy dissipation main line 104 or the energy dissipation bypass line 103 of the slurry conveying pipeline;

[0120] Step two: according to the operating parameters of the slurry conveying system, including the slurry density, the flow rate, the concentration, select a slurry pipeline energy dissipation orifice plate with appropriate body shape parameters, including the hole-diameter ratio β, the thickness-diameter ratio a and the angle-diameter ratio γ;

[0121] Step 3: Control the flow direction of the slurry through the electric ball valve, so that the slurry passes through the main energy dissipation path 104 or the energy dissipation bypass 103, and dissipates energy through the energy dissipation orifice plate of the slurry pipeline;

[0122] Step 4: Use a pressure transmitter to monitor the pressure change before and after energy dissipation, and use a concentration transmitter 91 and a flow transmitter 92 to monitor the concentration and flow rate of the slurry.

[0123] Step 5: Based on the monitoring data, adjust the position of the adjustable energy dissipation orifice plate or replace it with an energy dissipation orifice plate of different shape parameters to adapt to different working conditions.

[0124] Step 6: If necessary, flush the energy dissipation orifice plate through flushing water pipe 110 to prevent blockage;

[0125] Step 7: When overhauling or replacing the energy dissipation orifice plate, control the slurry flow direction through an electric knife gate valve to ensure safe operation.

[0126] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0127] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0128] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A slurry pipeline energy dissipation system, characterized in that, This includes slurry inlet pipeline components, energy dissipation main pipeline components, energy dissipation bypass pipeline components, post-station pipeline components, and slurry storage tank pipeline components; The slurry pipeline assembly includes a slurry pipeline (101), on which a first electric ball valve (21), a first pressure transmitter (31), and a pig receiving port (102) are arranged in sequence. The energy dissipation main pipeline assembly includes an energy dissipation main pipeline (104), one end of which is connected to the slurry pipeline (101) between the first pressure transmitter (31) and the pig receiving port (102). The energy dissipation main pipeline (104) is sequentially provided with a second electric ball valve (22), at least one fixed energy dissipation orifice plate (11), and at least one energy dissipation ring structure. Each energy dissipation ring structure includes an electric ball valve mounted on the energy dissipation main pipeline (104) and an inverted U-shaped energy dissipation ring mounted on both sides of the electric ball valve. The inverted U-shaped energy dissipation ring is provided with an adjustable energy dissipation orifice plate and an adjustable energy dissipation vacator. Pressure transmitters are provided on the energy dissipation main pipeline (104) at the front end of the inverted U-shaped energy dissipation ring, and an electric ball valve is provided on the energy dissipation main pipeline on the outlet side of the energy dissipation ring structure at the very end. Fixed energy dissipation orifice plates refer to energy dissipation orifice plates installed on transverse pipelines on the main energy dissipation road and energy dissipation bypass; adjustable energy dissipation orifice plates refer to energy dissipation orifice plates installed on inverted U-shaped energy dissipation rings; the structures of fixed energy dissipation orifice plates and adjustable energy dissipation orifice plates are the same as those of slurry pipeline energy dissipation orifice plates, but the chamfers (1021), thicknesses (1022), and apertures (1023) of their respective wear-resistant parts are the same or different at different positions in the slurry pipeline; The energy dissipation bypass pipeline assembly includes an energy dissipation bypass (103), one end of which is connected to the energy dissipation main pipeline (104) at the front end of the second electric ball valve (22), and its end is connected to the end of the energy dissipation main pipeline (104); at least one fixed energy dissipation orifice plate and at least one pressure transmitter are provided on the energy dissipation bypass (103), and an electric ball valve is also provided at its end; The post-station pipeline assembly includes a post-station pipeline (105), the front end of which is connected to the end of the energy dissipation main pipeline (104), and a concentration transmitter (91) and a flow transmitter (92) are installed on the post-station pipeline (105); a pressure transmitter is installed at the rear end of both the concentration transmitter (91) and the flow transmitter (92). The slurry storage tank pipeline assembly includes a slurry storage tank pipeline (107), the front end of which is connected to the end of the downstream pipeline (105), and the end of which is connected to the slurry storage tank (71); an electric knife gate valve is installed on the slurry storage tank pipeline (107); The above-mentioned system uses a slurry pipeline energy dissipation orifice plate, which includes a flange assembly, a wear-resistant part (1002), a shell (1004), and a spiral wound gasket (1007). The flange assembly includes two axisymmetrically arranged flanges. The flanges are of the neck-welded raised face type, and the neck is fixedly and sealed to the slurry pipe. The outer peripheries of the two flanges are connected by fastening fasteners. Both the shell (1004) and the wear-resistant part (1002) are hollow annular structures with L-shaped cross sections. The two are combined to form a central annular structure with a cavity, which is then sandwiched in the middle by the two flanges. The diameter of the cavity of the two flanges is larger than the diameter of the cavity of the central annular structure. The housing (1004) is tightly assembled with the wear-resistant part (1002); the inner corners of the housing (1004) are rounded. The spiral wound gasket (1007) is in the shape of a ring and is disposed on the connection surface of the flange (1001), the housing (1004), and the wear-resistant part (1002); The body shape parameters of the wear-resistant part, chamfer (1021), thickness (1022) and aperture (1023), are defined as follows, and the aperture ratio is... Aspect Ratio angular diameter ratio Multiple energy dissipation orifice plates with wear-resistant parts of different shape parameters are arranged in the slurry pipeline; The fixed or adjustable energy dissipation orifice plate determines the energy dissipation pressure drop head. The method is as follows: ； ； Eliminate total pressure drop: ; In the above formula: - Eliminate total pressure drop, mH2O; in These are the pressure drop eliminated by energy dissipation orifice plates with different shape parameters in the pipeline, where A, B, ..., N are the respective arrangement quantities of energy dissipation orifice plates with different shape parameters; In the above formula: - Energy dissipation pressure drop head, mH2O; -Pulp density, m 3 / h; k - energy dissipation coefficient; - Slurry flow velocity in the pipe, m / s; α - thickness-to-diameter ratio; β - aperture ratio; γ - angular diameter ratio; - Reynolds number; the energy dissipation coefficient k is a function of the thickness-to-diameter ratio α, aperture ratio β, angular diameter ratio γ, and Reynolds number. The functional relationship is established through fluid dynamics and experimental fitting, as follows: Through experiments, data were collected on the chamfer, thickness, pore size, Reynolds number, and energy dissipation pressure drop head of wear-resistant parts at different locations. and flow rate Using experimental data, the energy dissipation coefficient k is fitted; based on the fitting results, a mathematical model is established to describe the calculation method of k, and additional experimental data is used to verify the accuracy of the model.

2. The slurry pipeline energy dissipation system according to claim 1, characterized in that, The wear-resistant part (1002) has a density greater than 3.05 g / cm³ and a hardness greater than 2700 HV. It is manufactured through a process of granulation, isostatic pressing, sintering, and fine blank processing. During the manufacturing process, the wear-resistant part material is guaranteed to be free of cracks, voids, and deformities. The wear-resistant part is manufactured as a whole.

3. The slurry pipeline energy dissipation system according to claim 1, characterized in that, It also includes a pre-station blasting pipeline assembly and a post-station blasting pipeline assembly; the pre-station blasting pipeline includes a pre-station blasting pipeline (108), the front end of which is connected to the pipeline before the junction of the self-energy dissipation main road (104) and the energy dissipation bypass (103), and the end of which is connected to the slurry storage tank (71); a high-pressure manual ball valve (41) and a high-pressure rupture disc (51) are arranged on the pre-station blasting pipeline (108). The post-station blasting pipeline includes a post-station blasting pipeline (109), the front end of which is connected to the post-station pipeline (105), and the end end of which is connected to the slurry storage tank (71).

4. The slurry pipeline energy dissipation system according to claim 1, characterized in that, It also includes a dewatering-thickening integrated pipeline, including a dewatering-thickening integrated pipeline (106), the front end of which is connected to the pipeline after the junction of the slurry storage tank pipeline (107) and the station pipeline (105), and the dewatering-thickening integrated pipeline (106) is equipped with an electric knife gate valve.

5. The slurry pipeline energy dissipation system according to any one of claims 3-4, characterized in that, It also includes a flushing water pipeline assembly, which includes a flushing water pump (8) and a flushing water pipeline (110) connected to the output end of the flushing water pump. The flushing water pipeline (110) is connected to the main energy dissipation pipeline (104), the post-station pipeline (105), the pre-station blasting pipeline (108) set at the front end of the main energy dissipation pipeline, and the post-station blasting pipeline (109) set at the rear end of the post-station pipeline through different branch pipelines. Electric knife gate valves are installed on each of the different branch pipelines.

6. The slurry pipeline energy dissipation system according to claim 1, characterized in that, The energy dissipation coefficient k is calculated using the following formula: ; C0, C1, C2, and C3 are correction coefficients obtained by fitting experimental data; It is the change in temperature, relative to the standard operating temperature; It is the change in slurry density relative to the standard operating density; It is the change in dynamic viscosity of the slurry, relative to the standard operating viscosity; It is the basic energy dissipation coefficient, which represents the relationship between the energy dissipation coefficient and the aperture ratio, thickness-to-diameter ratio, angle-to-diameter ratio, and Reynolds number under standard operating conditions; , , These are temperature correction, density correction, and viscosity correction.

7. The energy dissipation method of the slurry pipeline energy dissipation system as described in claim 1, characterized in that, Includes the following steps: Step 1: Install multiple energy dissipation orifice plates for slurry pipelines on the main energy dissipation path (104) or the energy dissipation bypass path (103) of the slurry conveying pipeline; Step 2: Based on the operating parameters of the slurry delivery system, including slurry density, flow rate, and concentration, select an energy dissipation orifice plate for the slurry pipeline with appropriate shape parameters, including aperture ratio β, thickness-to-diameter ratio α, and angle-to-diameter ratio γ. Step 3: Control the flow direction of the slurry by using an electric ball valve, so that the slurry passes through the main energy dissipation path (104) or the energy dissipation bypass (103), and dissipates energy through the energy dissipation orifice plate of the slurry pipeline; Step 4: Use a pressure transmitter to monitor the pressure change before and after energy dissipation, and use a concentration transmitter (91) and a flow transmitter (92) to monitor the concentration and flow rate of the slurry; Step 5: Based on the monitoring data, adjust the position of the adjustable energy dissipation orifice plate or replace it with an energy dissipation orifice plate of different shape parameters to adapt to different working conditions. Step 6: If necessary, flush the energy dissipation orifice plate through the flushing water pipe (110) to prevent blockage; Step 7: When overhauling or replacing the energy dissipation orifice plate, control the slurry flow direction through an electric knife gate valve to ensure safe operation.

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