Sand and water circulation system

Abstract

The present invention discloses a sand-water circulation system, which includes a sand-water collection mechanism having a sand-water collection tank and a return structure for returning material to the sand-water collection tank. The sand-water collection tank has a sedimentation tank and a return water tank, and the upper layer solution of the sedimentation tank can flow to the return water tank. The sand-water collection tank is provided with at least one wave suppression plate that can disturb the sand-water medium in the sedimentation tank. A cyclone separator has a sewage inlet, a sewage outlet, and a steel grit outlet. The sewage inlet is connected to the return water tank, and the steel grit outlet is connected to the sedimentation tank. A sewage treatment device includes a sewage filter and a water tank. The sewage filter is arranged inside the water tank. The inlet of the water tank is connected to the sewage outlet of the cyclone separator. The clean water outlet of the water tank is connected to a clean water pipeline. The sand-water circulation system can effectively suppress the transmission and diffusion of liquid surface waves in the sand-water collection tank, eliminate the influence of liquid surface fluctuations on the agitation of deposited particles, achieve effective and stable deposition of particles, and meet the requirements of efficient separation of sand and water.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing equipment, in particular to a sand and water circulation system. Background Art

[0002] During hot rolling or heat treatment, metal materials develop a dense layer of metal oxides, commonly known as "scale," on their surfaces. This scale can hinder further processing: First, it can make surface cracks difficult to detect, leading to quality issues in the finished product. Second, the scale can be pressed into the metal surface during rolling. If the oxide layer subsequently falls off, it can create depressions on the metal surface, causing surface quality issues. Furthermore, the presence of oxides accelerates wear on the rolls or drawing machines. Therefore, descaling is essential for steel sheets before cold rolling.

[0003] At present, the existing steel plate descaling methods are as follows:

[0004] 1. Tool descaling: This method uses tools such as wire brushes to polish the steel surface, removing loose or warped scale, rust, welding slag, etc. Manual tool descaling can achieve Sa2 level; however, tool descaling is inefficient, cannot achieve product automation, and is relatively harmful to the human body.

[0005] 2. Pickling and Descaling: Strong acid solutions such as sulfuric acid, hydrochloric acid, and hydrofluoric acid are commonly used to descale the steel plate surface. Chemical pickling can remove scale, rust, and old coatings. While chemical cleaning can achieve a certain degree of surface cleanliness and roughness, pickling is prone to over-corrosion and hydrogen embrittlement, and acid mist is harmful to humans and the environment. The chemical wet pickling process is very harsh in the production environment and produces a large amount of residual acid that requires recycling and regeneration. The exhaust gas contains a large amount of acidic and corrosive components, such as HCl and SO2, which directly pollute the atmosphere.

[0006] 3. Shot peening: Shot peening uses metal projectiles, compressed air or mechanical centrifugal force, and friction to remove metal rust. Shot peening provides a strong impact and a significant cleaning effect. However, it can easily deform the steel plate and cause significant environmental pollution. It can only be performed in confined spaces, resulting in low efficiency.

[0007] 4. Slurry descaling: Several companies and R&D institutions have applied for patented technologies for descaling steel plates using a mixture of particles and water. There are two main technical solutions: one uses a high-pressure water jet to carry metal and other sand particles to impact the steel plate surface at high speed to remove the oxide scale; the other uses a centrifugal shot blasting machine to accelerate the sand-water mixture, projecting the sand-water mixture onto the steel plate surface to remove the oxide scale. High-pressure water jets require a high water supply pressure, resulting in severe wear and tear on the jet nozzles, resulting in a short service life. Wet shot blasting requires sand-water separation and water purification and filtration, making the sand-water circulation system more complex and resulting in poor sand-water separation. Summary of the Invention

[0008] The purpose of the present invention is to provide a sand-water circulation system for a steel plate iron oxide scale removal device, which can effectively suppress the transmission and diffusion of liquid surface waves in the sand-water collection tank, eliminate the influence of liquid surface fluctuations on the stirred deposited particles, realize the effective and stable deposition of particles, and meet the efficient separation of sand and water.

[0009] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0010] The present invention provides a sand-water circulation system, which comprises:

[0011] The sand and water collection mechanism comprises a sand and water collection tank and a return structure for returning material to the sand and water collection tank. The sand and water collection tank comprises a sedimentation tank and a return water tank. The upper layer solution of the sedimentation tank can flow to the return water tank. A sand outlet is provided at the bottom of the sedimentation tank. The sand outlet is connected to a clean water pipeline and a sand and water projection pipeline respectively through a sand mixing valve. The sand and water projection pipeline is connected to the return structure. The sand and water collection tank is provided with at least one wave suppression plate capable of disturbing the sand and water medium in the sedimentation tank.

[0012] The cyclone separator has a sewage inlet, a sewage outlet, and a steel grit outlet; the sewage inlet is connected to the return water tank, and the steel grit outlet is connected to the sedimentation tank;

[0013] The sewage treatment device comprises a sewage filter and a water tank, wherein the sewage filter is arranged inside the water tank, the inlet of the water tank is connected to the sewage outlet of the cyclone separator, and the clean water outlet of the water tank is connected to the clean water pipeline.

[0014] In a preferred embodiment of the present invention, fixed plates are provided on both side walls of the sedimentation tank, the wave suppression plate is movably provided between two opposite fixed plates, and a plurality of water holes are provided on the wave suppression plate.

[0015] In a preferred embodiment of the present invention, a plurality of water holes are provided on the fixing plate.

[0016] In a preferred embodiment of the present invention, the wave suppression plate is provided with at least three layers of water hole groups at intervals along its height direction, and each layer of the water hole group has a plurality of the water holes provided along the length direction of the wave suppression plate.

[0017] In a preferred embodiment of the present invention, the flow areas of the multiple water holes on the wave suppression plate are the same; or, the flow areas of the multiple water holes in the water hole groups in each layer on the wave suppression plate gradually decrease along the height direction of the wave suppression plate.

[0018] In a preferred embodiment of the present invention, the shape of the water hole is circular, polygonal, arc-polygonal or criss-cross.

[0019] In a preferred embodiment of the present invention, a spray device is provided on the top of the sand and water collection tank. The spray device has a plurality of spray heads arranged above the sedimentation tank and the return water tank and used to eliminate foam generated in the tank.

[0020] In a preferred embodiment of the present invention, a sand amount regulating valve is connected between the sand outlet of the sedimentation tank and the sand mixing valve.

[0021] In a preferred embodiment of the present invention, the sedimentation tank has multiple sand outlets, each of the sand outlets is connected to a sand mixing valve, the clean water pipeline is connected to a water flow distribution pipeline, the water flow distribution pipeline is connected to multiple sand mixing valves, and a water volume regulating valve is provided on the water flow distribution pipeline.

[0022] In a preferred embodiment of the present invention, after adjustment by the sand amount regulating valve and the water amount regulating valve, the mass ratio of water to sand entering the sand mixing valve is 1:0.1~4, the volume ratio of water to sand entering the sand mixing valve is 1:0.2~0.6, and the flow rate of the sand-water mixed slurry at the outlet of the sand mixing valve is 200kg / min~900kg / min.

[0023] In a preferred embodiment of the present invention, a sand discharge hole is provided on the side wall of the sand and water collection trough, and an abrasive supply device is provided on the upper part of the sand and water collection trough; the abrasive supply device includes an abrasive bin and a screw conveyor connected to the abrasive bin, the screw conveyor is located at the upper part of the sedimentation tank, and an abrasive bin regulating valve is provided at the outlet of the abrasive bin.

[0024] In a preferred embodiment of the present invention, the material return structure has a discharge chute, and a discharge regulating valve is provided at the discharge port of the discharge chute.

[0025] In a preferred embodiment of the present invention, a first sewage regulating valve is provided at the sewage outlet of the return water tank, a second sewage regulating valve is provided at the sewage inlet of the cyclone separator, a flow regulating valve is provided at the sewage outlet of the cyclone separator, and a return sand regulating valve is provided at the steel sand outlet of the cyclone separator.

[0026] In a preferred embodiment of the present invention, a sewage pipe is connected to the bottom of the water tank, an outlet of the sewage pipe is connected to a waste barrel, and a sewage valve is connected to the sewage pipe.

[0027] In a preferred embodiment of the present invention, an overflow structure is provided between the sedimentation tank and the return water tank, and the overflow structure is a zigzag overflow plate or an overflow inclined plate.

[0028] In a preferred embodiment of the present invention, the diameter of the solid particles circulating in the sand and water circulation system is 0.30 mm to 0.8 mm.

[0029] In a preferred embodiment of the present invention, the material of the solid particles circulating in the sand-water circulation system is steel sand, steel shot, steel chips, glass beads, garnet, sand or brown diamond.

[0030] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0031] 1. In the sand and water circulation system of the present invention, a wave suppression plate is set in the sand and water collecting tank. The wave suppression plate can be raised and lowered to adjust the sand and water liquid level, thereby realizing dynamic adjustment of the sand and water separation effect. At the same time, the degree of water vortex in the sand and water collecting tank can be adjusted, the diameter of sand particles carried by the water flow can be adjusted, and the volume fraction and diameter of sand particles in the return water tank can be adjusted, thereby effectively reducing the sand particles entering the return water tank.

[0032] 2. In the sand-water circulation system of the present invention, the wave suppression plate provided can effectively reduce the disturbing effect of the sand-water mixture discharged from the discharge chute on the mixed solution in the sand-water collecting tank, reduce the liquid level fluctuation in the upper layer of the particle sedimentation tank, effectively suppress the transmission and diffusion of liquid surface waves through the water holes, eliminate the influence of liquid surface fluctuations on the stirred deposited sand particles, realize the effective and stable deposition of particles, and meet the efficient separation of sand and water.

[0033] 3. In the sand-water circulation system of the present invention, a spray device is provided on the top of the sand-water separation device, and the spray device is used to spray atomized water to effectively eliminate the foam formed in the sand-water collection tank, thereby avoiding the formation of a large amount of foam and causing overflow.

[0034] 4. In the sand-water circulation system of the present invention, by adopting water holes of different shapes, the turbulence of water after flowing through the wave suppression plate can be effectively controlled, the liquid level fluctuation and internal turbulence can be reduced, the efficiency of sand-water separation and the amount of deposited sand can be improved, and the loss of precipitated sand particles into the return water tank can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0036] Figure 1 Schematic diagram of the overall structure of the sand-water circulation system of the present invention;

[0037] Figure 2 Schematic diagram of the top view of the sand and water circulation system of the present invention;

[0038] Figure 3 This is a structural schematic diagram of the sand and water collection tank of the sand and water circulation system of the present invention;

[0039] Figure 4 This is a structural diagram of the material return mechanism of the sand and water circulation system of the present invention;

[0040] Figure 5 This is a schematic structural diagram of a cyclone separator in the sand-water circulation system of the present invention;

[0041] Figure 6 This is a structural schematic diagram of the sedimentation tank and the wave suppression plate inside the sand-water circulation system of the present invention;

[0042] Figure 7 This is a schematic structural diagram of the wave suppression plate of the sand-water circulation system of the present invention;

[0043] Figure 8 This is a schematic structural diagram of the circular water holes in the sand-water circulation system of the present invention;

[0044] Figure 9 This is a schematic structural diagram of the polygonal water holes in the sand-water circulation system of the present invention;

[0045] Figure 10 This is a structural schematic diagram of the arc polygonal water hole of the sand-water circulation system of the present invention;

[0046] Figure 11 This is a schematic structural diagram of the combined polygonal water holes of the sand-water circulation system of the present invention;

[0047] Figure 12 This is a schematic structural diagram of the multi-prism water holes in the sand-water circulation system of the present invention;

[0048] Figure 13 This is a schematic structural diagram of the cross-shaped water hole of the sand-water circulation system of the present invention;

[0049] Figure 14 This is a structural schematic diagram of the sawtooth overflow plate of the present invention;

[0050] Figure 15 This is a schematic structural diagram of the overflow inclined plate of the present invention;

[0051] Figure 16 This is a side structural schematic diagram of the overflow inclined plate described in the present invention.

[0052] Description of Figure Numbers:

[0053] 10. Sand and water collection mechanism; 11. Sand and water collection tank; 111. Sedimentation tank; 1111. Sand outlet; 112. Return water tank; 1121. Sewage outlet; 113. Spraying device; 1131. Spraying head; 114. Camera; 115. Sand discharge hole; 116. Fixing plate; 1161. Water hole; 12. Return material structure; 121. Discharge chute; 1211. Discharge outlet; 1212. Discharge regulating valve; 1213. Discharge hole; 122. Dephosphorization box; 123. Sand and water ejector; 124. Motor; 125. Steel plate;

[0054] 20. Cyclone separator; 21. Sewage inlet; 211. Second sewage regulating valve; 22. Sewage outlet; 221. Flow regulating valve; 23. Steel grit outlet; 231. Return sand regulating valve;

[0055] 30. Sewage treatment device; 31. Water tank; 311. Sewage inlet; 312. Clean water outlet; 32. Sewage filter;

[0056] 40. Sand mixing valve;

[0057] 50. Surge plate; 51. Water hole group; 52. Water hole; 53. Lifting mechanism;

[0058] 60. Abrasive supply device; 61. Abrasive bin; 62. Rotary conveying mechanism; 63. Abrasive bin regulating valve

[0059] 71. Clean water pipeline; 711. Clean water pump; 72. Water distribution pipeline; 73. Sand and water jetting pipeline; 74. Sewage pipeline; 741. Sewage pump; 75. Steel grit return pipeline; 76. Sewage pipeline;

[0060] 81. Sand volume regulating valve; 82. First sewage regulating valve; 83. Blowdown valve; 84. Water volume regulating valve;

[0061] 90. Overflow structure; 91. Sawtooth overflow plate; 911. Water flow hole; 912. Sawtooth blocking area; 913. Water overflow area; 92. Overflow inclined plate; 921. Water gap inlet; 922. Water gap outlet; 923. Sawtooth blocking area; 924. Water overflow area. DETAILED DESCRIPTION

[0062] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0063] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0065] The present invention provides a sand-water circulation system, such as Figures 1 to 3 As shown, it includes:

[0066] The sand and water collection mechanism 10 comprises a sand and water collection tank 11 and a return structure 12 for returning material to the sand and water collection tank 11. The sand and water collection tank 11 comprises a sedimentation tank 111 and a return water tank 112. The upper layer solution of the sedimentation tank 111 can flow to the return water tank 112. A sand outlet 1111 is provided at the bottom of the sedimentation tank 111. The sand outlet 1111 is connected to the clean water pipeline 71 and the sand and water projection pipeline 73 respectively through a sand mixing valve 40. The sand and water projection pipeline 73 is connected to the return structure 12. At least one wave suppression plate 50 is provided in the sand and water collection tank 11 to disturb the sand and water medium in the sedimentation tank 111.

[0067] The cyclone separator 20 has a sewage inlet 21, a sewage outlet 22 and a steel grit outlet 23; the sewage inlet 21 is connected to the return water tank 112, and the steel grit outlet 23 is connected to the sedimentation tank 111;

[0068] The sewage treatment device 30 includes a sewage filter 32 and a water tank 31. The sewage filter 32 is arranged inside the water tank 31. The inlet of the water tank 31 is connected to the sewage outlet 22 of the cyclone separator 20. The clean water outlet 312 of the water tank 31 is connected to the clean water pipeline 71.

[0069] The sand and water circulation system described in the present invention can be used in equipment for mechanically removing iron oxide from steel plates. The recycling of sand and water is achieved through the sand and water collecting mechanism 10, the cyclone separator 20 and the sewage treatment device 30, which greatly reduces the consumption of sand and water in the mechanical dephosphorization process. Furthermore, the present invention is provided with a wave suppression plate 50 in the sand and water collecting tank 11, which can effectively reduce the disturbing effect of the sand and water mixture discharged by the return structure 12 on the mixed solution in the sand and water collecting tank 11, reduce the liquid level fluctuation in the upper layer of the sedimentation tank 111, eliminate the influence of the liquid level fluctuation on the deposited sand, realize the effective and stable deposition of particles, and meet the efficient separation of sand and water.

[0070] For details, please refer to Figures 1 to 5 The sand and water circulation system of the present invention is used in the steel plate mechanical dephosphorization equipment, and mainly includes a sand and water collection mechanism 10. The sand and water collection mechanism 10 can collect the sand and water mixture produced after the dephosphorization equipment is dephosphorized and perform preliminary separation of the sand and water in the sand and water mixture. The sand and water collection mechanism 10 includes a return structure 12 for collecting the sand and water mixture and a sand and water collection tank 11 for separating the sand and water mixture. Figure 1 and Figure 4 As shown, the dephosphorization box 122 in the mechanical dephosphorization equipment has a steel plate 125 that is conveyed forward by a conveying mechanism. Sand and water ejectors 123 are provided on the upper and lower parts of the steel plate 125. The sand and water ejector 123 is connected to a motor 124 for driving the sand and water ejector 123 to rotate. A sand and water ejection pipeline 73 with a sand and water mixed slurry is connected to the sand and water ejector 123 for feeding the sand and water ejector 123. During dephosphorization operation, the motor 124 drives the sand and water ejector 123 to rotate at high speed, ejecting the sand and water mixed slurry at high speed onto the surface of the steel plate 125. The iron oxide scale on the steel plate 125 is removed by the high-speed impact of the sand and water mixed slurry. The sand and water mixture ejected onto the surface of the steel plate 125 is collected at the bottom of the dephosphorization box. The entire return material structure 12 is located at the upper part of the sand and water collection tank 11. The sand and water mixture collected at the bottom of the dephosphorization box 122 is discharged into the sand and water collection tank 11 through the outlet at the bottom.

[0071] like Figures 1 to 3As shown, the sand-water collection tank 11 has a connected sedimentation tank 111 and a return water tank 112. The upper solution of the sedimentation tank 111 can flow to the return water tank 112. The outlet at the bottom of the return material structure 12 is located at the upper part of the sedimentation tank 111; Figure 2 As shown, in this embodiment, the sand and water collection tank 11 has two settling tanks 111 and two return water tanks 112 arranged side by side. The number of the settling tanks 111 and return water tanks 112 can be determined according to the needs of the actual operation process and is not specifically limited here. The bottom of the settling tank 111 has a sand outlet 1111, through which sand particles settled at the bottom of the settling tank 111 can be discharged. The sand outlet 1111 is connected to the sand mixing valve 40 at the bottom of the settling tank 111. The sand mixing valve 40 is also connected to the clean water pipeline 71 and the sand and water ejection pipeline 73. The sand mixing valve 40 is used to mix the sand particles entering the sand mixing valve 40 through the sand outlet 1111 and the clean water entering the sand mixing valve 40 through the clean water pipeline 71 to produce a sand and water mixed slurry for sand throwing. The mixed sand and water mixed slurry enters the sand ejection pipeline 73 and enters the sand and water ejector 123 for sand throwing on the steel plate 125. As described above, the sand particles in the sand-water mixture that has undergone the dephosphorization operation are collected by the return material structure 12, initially precipitated and separated in the sand-water collection tank 11, and reused by the sand mixing valve 40, and can be recycled. Furthermore, a wave suppression plate 50 is provided in the sand-water collection tank 11. The end face of the wave suppression plate 50 is perpendicular to the direction in which the liquid flows from the sedimentation tank 111 to the return water tank 112. The wave suppression plate 50 is inserted into the sand-water mixture located at the upper part of the sedimentation tank 111. Along the direction close to the return water tank 112, the sedimentation tank 111 is divided into multiple areas by the wave suppression plate 50. In this embodiment, three wave suppression plates 50 are provided inside the sedimentation tank 111 along the direction close to the return water tank 112. The number of wave suppression plates 50 can be set according to the liquid level fluctuation and sedimentation conditions of the sand-water mixture inside the sedimentation tank 111, and is not specifically limited here.

[0072] For details, please refer to Figure 1 and Figure 4 The sand-water circulation system of the present invention further comprises a cyclone separator 20 for further separation of the sand-water mixture. Figure 1 and Figure 3As shown, the sewage entering the return tank 112 after preliminary sedimentation and separation still contains a small amount of sand particles. The sewage outlet 1121 at the bottom of the return tank 112 is connected to the cyclone separator through the sewage pipe 74. The cyclone separator 20 is used to further separate the sewage collected in the return tank 112. The cyclone separator 20 has a sewage inlet 21, a sewage outlet 22, and a steel grit outlet 23. The outlet of the sewage pipe 74 is connected to the sewage inlet 21 of the cyclone separator 20. A sewage pump 741 is provided on the sewage pipe 74 to pass the sewage in the return tank 112 into the cyclone separator 20. The sewage outlet 22 of the cyclone separator 20 is connected to the sewage treatment device 30. The sewage containing a small amount of impurities separated by the cyclone separator 20 enters the sewage treatment device 30 for treatment. The steel grit outlet 23 of the cyclone separator 20 is connected to the sedimentation tank 111 of the sand and water collection tank 11 through the steel grit return pipe 75. The sand separated by the cyclone separator 20 flows back into the sedimentation tank 111 through the steel grit return pipe 75 for further recycling. Figure 2 As shown, in this embodiment, two cyclone separators 20 are provided and connected to the two return water tanks 112 respectively. The number of cyclone separators 20 provided can be determined according to the flow rate of sewage and the processing capacity of the cyclone separators 20, and is not specifically limited here.

[0073] Specifically, the sand-water circulation system of the present invention further includes a sewage treatment device 30 for purifying sewage. Figure 1 and Figure 2 As shown, the sewage treatment device 30 includes a sewage filter 32 and a water tank 31. The sewage filter 32 is disposed within the water tank 31 and is used to filter the sewage. The water tank 31 is used to store the purified water produced after filtration. The sewage inlet 311 of the water tank 31 is connected to the sewage outlet 22 of the cyclone separator 20. The purified water outlet 312 of the water tank 31 is connected to the purified water pipeline 71. The purified water pipeline 71 is provided with a purified water pump 711. The purified water pump 711 is used to pass the purified water within the water tank 31 into the sand mixing valve 40 for mixing with the sand. As described above, the sewage in the sand-water mixture after the phosphorus removal operation is collected by the return structure 12, initially separated by the sand-water collection tank 11, further separated by the cyclone separator 20, purified by the sewage treatment device 30, and reused by the sand mixing valve 40, thereby achieving recycling.

[0074] In a feasible embodiment of the present invention, fixed plates 116 are provided on both side walls of the sedimentation tank 111 , and the wave suppression plate 50 is movably provided between the two opposite fixed plates 116 . The wave suppression plate 50 is provided with a plurality of water holes 52 .

[0075] The wave suppression plate 50 in the present invention can be raised and lowered to adjust the height of the sand and water liquid level, thereby realizing dynamic adjustment of the sand and water separation effect. At the same time, it can adjust the degree of water vortex in the sand and water collecting tank 11, adjust the diameter of the sand particles carried by the water flow, and adjust the volume fraction and diameter of the sand particles in the return water tank 112, thereby effectively reducing the sand particles entering the return water tank 112.

[0076] Specifically, such as Figure 6 As shown, fixed plates 116 are provided on both side walls of the sedimentation tank 111, and two corresponding fixed plates 116 form a group. A U-shaped groove extending in the height direction is provided on the edge of each group of fixed plates close to the wave suppression plate 50, and the wave suppression plate 50 can be arranged in the U-shaped groove of the fixed plate 116 so as to be movable up and down, and a water hole 52 is provided on the wave suppression plate 50; in this embodiment, a lifting mechanism 53 is connected to the wave suppression plate 50, and the lifting mechanism 53 is connected to the wave suppression plate 50 through a connecting piece. The lifting mechanism 53 can adjust the height of the wave suppression plate 50 in the sand and water collecting tank 11, thereby realizing dynamic adjustment of the water flow rate of the water hole 52, and dynamically controlling the height of the sand and water liquid level in the sedimentation tank 111; at the same time, by adjusting the height of the wave suppression plate 50, the diameter and amount of sand particles carried away by the water flow through the wave suppression plate 50 in the sedimentation tank 111 can be adjusted, and the diameter of the sedimentation particles in the sedimentation tank 111 can be dynamically adjusted to meet the requirements of the sand particle diameter in the sand and water mixed slurry for removing iron oxide scale from the steel plate 125 in the descaling box.

[0077] In one possible embodiment of the present invention, Figure 6 As shown, a plurality of water holes 1161 are provided on the fixing plate 116. The water holes 1161 provided on the fixing plate 116 can ensure the stable flow of the sand-water mixture in the sedimentation tank 111 and prevent the liquid level fluctuation caused by the fixing plate 116 hindering the flow of the sand-water mixture.

[0078] In one possible embodiment of the present invention, Figure 7 As shown, the wave suppression plate 50 is provided with at least three layers of water hole groups 51 spaced apart along its height direction Y. Each layer of water hole groups 51 includes multiple water holes 52 arranged along the length direction X of the wave suppression plate 50. The high density and uniform arrangement of water holes 52 on the wave suppression plate 50 ensures that wastewater in the sedimentation tank 111 flows smoothly to the return tank 112 while the wave suppression plate 50 reduces fluctuations in the liquid level in the upper layer of the sedimentation tank 111.

[0079] Specifically, in this embodiment, the wave suppression plate 50 is provided with 8 layers of water hole groups 51 at intervals along its height direction Y, and each layer of water hole group 51 has 25 water holes 52 arranged along the length direction X of the wave suppression plate 50; the distribution number of water holes 52 on the wave suppression plate 50 can be set according to actual needs and is not specifically limited here.

[0080] In one possible embodiment of the present invention, Figure 6 As shown in FIGS. 7, the flow-through areas of the plurality of water through-holes 52 on the wave suppressing plate 50 are the same; in another feasible embodiment of the present invention, the flow-through areas of the plurality of water through-holes 52 within each layer of water through-hole groups 51 on the wave suppressing plate 50 gradually decrease along the height direction Y of the wave suppressing plate 50. At the same time, by adjusting the sizes of the water through-holes 52 at different positions on the wave suppressing plate 50, it is possible to adjust the diameter and amount of sand grains carried away by the water flow when the water flow in the sedimentation tank 111 passes through different positions of the wave suppressing plate 50, and further adjust the diameter of the deposited particles in the sedimentation tank 111, further meeting the requirements for the diameter of the sand grains in the sand-water mixed slurry for removing the scale on the steel plate 125 in the descaling box.

[0081] In a feasible embodiment of the present invention, the shape of the water through-hole 52 is circular, polygonal, arc polygonal or cross-shaped.

[0082] Specifically, in one embodiment, as Figure 8 shown, the shape of the water through-hole 52 is circular, and the radius R1 of the water through-hole 52 is 20 mm to 80 mm; in another embodiment, as Figure 9 shown, the shape of the water through-hole 52 is polygonal, and the longest inner diameter D of the water through-hole 52 is 40 mm to 160 mm; in yet another embodiment, as Figure 13 shown, the shape of the water through-hole 52 is cross-shaped, the longest diameter D5 of the water through-hole 52 is 40 mm to 160 mm, the cross shape includes a central circular structure and a plurality of n-shaped structures with different lengths located in the circumferential direction of the circular structure, and the water through-hole 52 is formed along the outer contour where the n-shaped structures intersect; wherein, the ratio range of the outer circle radius r5 to the inner circle radius R5 is 1:5 to 1:3, the length of the short n-shaped structure is h5, r5 < h5 < 2 * r5, and the ratio range of the length H5 of the long n-shaped structure to the length h5 of the short n-shaped structure is 1:1.5 to 1:3.

[0083] In a feasible embodiment of the present invention, as Figure 10 shown, the shape of the water through-hole 52 is arc polygonal, the longest radius R2 of the water through-hole 52 is 20 mm to 80 mm, the arc polygonal includes a central circular structure and a plurality of circular arc structures located in the circumferential direction of the circular structure, and the water through-hole 52 is formed along the outer contour where the circular arc structures intersect; wherein, the ratio range of the outer circle radius r2 to the longest radius R2 is 1:3 to 1:5.

[0084] In a feasible embodiment of the present invention, as Figure 11As shown, the shape of the water hole 52 is a combined polygon, the longest diameter D3 of the water hole 52 is 40 mm to 160 mm, the combined polygon includes a circular structure in the center and multiple n-shaped structures located in the circumference of the circular structure, and the water hole 52 is opened along the outer contour of the intersection of the n-shaped structures; wherein the ratio of the outer circle radius r3 to the inner circle radius R3 ranges from 1:3 to 1:5, the n-shaped length is h3, r3 <h3<2*r3。

[0085] In one possible embodiment of the present invention, Figure 12 As shown, the shape of the water hole is a polygonal column, and the longest diameter D4 of the water hole 52 is 40 mm to 160 mm. The polygonal column includes a circular structure in the center and multiple rectangular structures located in the circumference of the circular structure. The water hole 52 is opened along the outer contour of the intersection of the rectangular structures; wherein the ratio of the rectangle width w4 to the inner circle radius R4 ranges from 1:1 to 1:3, the rectangle length is h4, w4 <h4<2*w4。

[0086] In one possible embodiment of the present invention, Figure 3 A spray device 113 is provided on the top of the sand and water collection tank 11. The spray device 113 has a plurality of spray heads 1131 arranged above the sedimentation tank 111 and the return water tank 112 and used to eliminate foam generated in the sand and water collection tank 11.

[0087] The spraying device 113 is used to spray atomized water to effectively eliminate the foam formed in the sand and water collection tank 11, thereby preventing the formation of a large amount of foam and causing overflow.

[0088] Specifically, such as Figure 3 As shown, in this embodiment, five spray heads 1131 are provided at the top of the sand and water collection tank 11 along the direction from the sedimentation tank 111 to the return water tank 112. The spray heads 1131 are directly facing the liquid levels at the upper parts of the sedimentation tank 111 and the return water tank 112. As the sand and water mixture flows back into the sand and water collection tank 11 from the lower opening of the dephosphorization tank 122, it causes the liquid level in the sedimentation tank 111 to fluctuate and a large amount of foam is generated at the upper part of the liquid level. When the foam accumulates to a certain extent, it may overflow from the opening area at the top of the sand and water collection tank 11, causing water accumulation outside the sand and water collection tank 11, affecting the operation of the equipment. A spray device 113 is provided at the top of the sand and water collection tank 11 to spray the foam with atomized droplets, thereby eliminating the foam at the upper part of the sand and water collection tank 11. At the same time, combined with the flow control function of the wave suppression plate 50, the formation and accumulation of foam are effectively eliminated.

[0089] Further, such as Figure 3As shown, a monitoring camera is set in the sand and water collection tank 11 to monitor the flow of sand and water, liquid level fluctuation and foam formation. According to the flow and fluctuation of sand and water, the height of the wave suppression plate 50 is dynamically adjusted to control the liquid level fluctuation and the amount of sand flowing into the return water tank 112; according to the amount of foam formed on the upper part of the liquid surface, when the predetermined foam accumulation height is reached, the spray device 113 is turned on to defoam the foam in the sand and water collection tank 11. The spray device 113 is provided with an independent water circulation system to realize dynamic control.

[0090] In one possible embodiment of the present invention, Figure 3 As shown, a sand quantity regulating valve 81 is connected between the sand outlet 1111 of the sedimentation tank 111 and the sand mixing valve 40. The sand quantity regulating valve 81 can adjust the flow rate of sand particles flowing from the sedimentation tank 111 into the sand mixing valve 40, thereby controlling the ratio of sand particles to water in the sand-water mixed slurry produced by the sand mixing valve 40.

[0091] In one possible embodiment of the present invention, Figure 2 and Figure 3 As shown, the sedimentation tank 111 has multiple sand outlets 1111, each sand outlet 1111 is connected to a sand mixing valve 40, the clean water pipeline 71 is connected to the water flow distribution pipeline 72, the water flow distribution pipeline 72 is connected to multiple sand mixing valves 40, and a water volume regulating valve 84 is set on the water flow distribution pipeline 72.

[0092] The sedimentation tank 111 is provided with multiple sand outlets 1111 to ensure that the precipitated sand particles at various positions inside the sedimentation tank 111 can be discharged in time, preventing excessive accumulation of sand particles inside the sedimentation tank 111; the water flow regulating valve 84 provided on the water flow distribution pipeline 72 can adjust the flow rate of clean water flowing from the clean water pipeline 71 into the sand mixing valve 40, thereby controlling the ratio of sand particles and water in the sand-water mixed slurry generated by the sand mixing valve 40.

[0093] Specifically, such as Figure 2 and Figure 3 As shown, in this embodiment, each sedimentation tank 111 is provided with four sand outlets 1111 at the bottom along its length direction N, and each sand outlet 1111 is connected to a sand mixing valve 40. The water distribution pipeline connected to the clean water pipeline is divided into four and is respectively connected to the four sand mixing valves 40; a sand amount regulating valve 81 and a water amount regulating valve 84 are respectively provided at the sand particle inlet and the clean water inlet of each sand mixing valve 40, and the outlets of the four sand mixing valves 40 are all connected to the sand and water projection pipeline 73, and the sand and water mixed slurry generated by the sand mixing valve 40 is merged into the sand and water projection pipeline 73.

[0094] In a feasible embodiment of the present invention, after adjustment by the sand amount regulating valve 81 and the water amount regulating valve 84, the mass ratio of water to sand entering the sand mixing valve 40 is 1:0.1~4, the volume ratio of water to sand entering the sand mixing valve 40 is 1:0.2~0.6, and the flow rate of the sand-water mixed slurry at the outlet of the sand mixing valve 40 is 200kg / min~900kg / min.

[0095] In a feasible embodiment of the present invention, a sand discharge hole 115 is opened on the side wall of the sand and water collection tank 11, and an abrasive supply device 60 is provided on the upper part of the sand and water collection tank 11; the abrasive supply device 60 includes an abrasive bin 61 and a screw conveyor connected to the abrasive bin 61, the screw conveyor is located at the upper part of the sedimentation tank 111, and the outlet of the abrasive bin 61 is provided with an abrasive bin regulating valve 63.

[0096] After the sand in the sand-water circulation system has been used for a certain period of time, as the sand gradually breaks and wears away, the deposited particles in the sand-water collecting tank 11 need to be replaced. The abrasive in the sand-water circulation system can be replaced through the sand discharge hole 115 and the abrasive supply device 60.

[0097] Specifically, such as Figure 3 As shown, sand discharge holes 115 are provided on the side walls of the sedimentation tank 111 and the return water tank 112 of the sand and water collection tank 11, and an abrasive supply device 60 is provided on the upper part of the sedimentation tank 111. When the abrasive needs to be replaced and reversed, the sedimentation particles in the sand and water collection tank 11 are discharged through the sand discharge holes 115, and then the abrasive bin 61 is replenished with new abrasive particles into the sedimentation tank 111 through a screw conveyor. The abrasive bin regulating valve 63 provided at the outlet of the abrasive bin 61 can control the flow of abrasive entering the sedimentation tank 111.

[0098] In one embodiment of the present invention, the return structure 12 includes a discharge chute 121, with a discharge regulating valve 1212 provided at a discharge port 1211 of the discharge chute 121. The discharge chute 121 is used to collect the sand-water mixture produced by the dephosphorization operation in the dephosphorization tank 122, and then pass the sand-water mixture into the sedimentation tank 111 of the sand-water collection tank 11 through the discharge port 1211 at the bottom.

[0099] Specifically, such as Figure 4 As shown, the discharge chute 121 is roughly an inverted cone structure, which is connected to the bottom of the dephosphorization box 122 and communicated with the dephosphorization box 122. A discharge port 1211 is provided at the bottom of the discharge chute 121. The discharge port 1211 is located above the sedimentation tank 111 of the sand and water collection tank 11. A discharge regulating valve 1212 is provided at the discharge port 1211, which can adjust the flow of the discharge port 1211.

[0100] In one possible embodiment of the present invention, Figure 3 and Figure 5 As shown, a first sewage regulating valve 82 is provided at the sewage outlet of the return water tank 112, a second sewage regulating valve 211 is provided at the sewage inlet 21 of the cyclone separator 20, a flow regulating valve 221 is provided at the sewage outlet 22 of the cyclone separator 20, and a return sand regulating valve 231 is provided at the steel grit outlet 23 of the cyclone separator 20. The first sewage regulating valve 82 can control the opening and closing of the sewage outlet, the second sewage regulating valve 211 can control the opening and closing of the sewage inlet 21 of the cyclone separator 20, and the first sewage regulating valve 82 and the second sewage regulating valve 211 can regulate the flow of sewage in the sewage pipeline 74; the flow regulating valve 221 at the sewage outlet 22 of the cyclone separator 20 can control the flow of sewage entering the sewage treatment device 30; and the return sand regulating valve 231 at the steel grit outlet 23 of the cyclone separator 20 can control the opening and closing of the steel grit return pipeline 75 and regulate the flow of sand particles in the steel grit return pipeline 75.

[0101] In one possible embodiment of the present invention, Figure 1 and Figure 2 As shown, a sewage pipe 76 is connected to the bottom of the water tank 31 , the outlet of the sewage pipe 76 is connected to the waste bucket, and a sewage valve 83 is connected to the sewage pipe 76 .

[0102] A small amount of fine-grained abrasive and detached iron oxide particles flow into the sewage treatment device 30 along with the water circulation system. After being filtered by the sewage filter 32, the fine-grained abrasive and iron oxide are removed by the filter, and extremely fine particles are precipitated at the bottom of the water tank 31 and discharged through the sewage pipe 76 at the bottom of the water tank 31. The discharged fine particles are discharged into the waste barrel and collected for recycling as iron-containing sludge raw materials. The sewage valve 83 is used to control the opening and closing of the sewage pipe 76.

[0103] In a feasible embodiment of the present invention, an overflow structure 90 is provided between the sedimentation tank 111 and the return water tank 112. In this embodiment, Figure 14 As shown, the overflow structure 90 is a sawtooth overflow plate 91, which is provided with a water flow hole 911 for water to pass through. A sawtooth-shaped structure is provided on the top of the sawtooth overflow plate 91, which is respectively provided as a water overflow area 913 and a sawtooth blocking area 912. The water overflow area 913 enables the passage of water, and the sawtooth blocking area 912 achieves effective blocking of foam on the upper water surface.

[0104] In other embodiments of the present invention, Figure 15 and Figure 16As shown, the overflow structure 90 is an overflow inclined plate 92. The overflow inclined plate 92 realizes the overflow function by setting a plurality of inclined plates. A water gap inlet 921 and a water gap outlet 922 are formed between the plurality of inclined plates. The position of the water gap inlet 921 is lower than the position of the water gap outlet 922. This structure can effectively prevent the loss of sand particles; a sawtooth-shaped structure is set on the top of the overflow inclined plate 92, which is respectively set as a water overflow area 924 and a sawtooth blocking area 923. The water overflow area 924 realizes the passage of water flow, and the sawtooth blocking area 923 realizes the effective blocking of foam on the upper water surface.

[0105] In a feasible embodiment of the present invention, the diameter of the solid particles circulating in the sand and water circulation system is 0.30 mm to 0.8 mm.

[0106] In a feasible embodiment of the present invention, the material of the solid particles circulating in the sand-water circulation system is steel sand, steel shot, steel chips, glass beads, garnet, sand or brown diamond.

[0107] The sand-water circulation system of the present invention comprises the following steps when in use:

[0108] First, a predetermined amount of abrasive particles is loaded into the abrasive bin 61, the abrasive bin regulating valve 63 is opened, the screw conveyor is started, and a predetermined amount of abrasive particles is loaded into the sedimentation tank 111 of the sand and water collection tank 11;

[0109] Open the discharge regulating valve 1212, open the water regulating valve 84, open the first sewage regulating valve 82, open the second sewage regulating valve 211, the flow regulating valve 221, and the return sand regulating valve 231;

[0110] Open the sewage filter 32, open the sand and water ejector 123, and open the clean water pump 711. Observe whether the water flow rate of the sand and water ejector 123 is normal. When the sand and water level in the sedimentation tank 111 reaches a predetermined height and the return water tank 112 accumulates a predetermined amount of water, open the sewage pump 741.

[0111] After the water flow is stably ejected, the sand amount regulating valve 81 is opened. When the flow rate of the sand-water mixed slurry ejected by the sand-water ejector 123 is normal, the steel plate 125 in the dephosphorization box 122 is transported forward along the forward direction M.

[0112] During the production process, the sand amount regulating valve 81 and the water amount regulating valve 84 can be dynamically adjusted according to the descaling effect of the steel plate 125 surface to adjust the sand-water ratio. At the same time, the flow rate of the sand-water mixture can be adjusted to achieve different sand and water ejection amounts required by different steel plate 125 surface qualities.

[0113] After the descaling of the steel plate 125 is completed, close the sand amount regulating valve 81, then close the clean water pump 711, close the sand and water ejector 123, close the discharge regulating valve 1212, close the water amount regulating valve 84, close the sewage pump 741, and close the sewage filter 32; close the first sewage regulating valve 82, close the second sewage regulating valve 211, the flow regulating valve 221 and the return sand regulating valve 231.

[0114] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sand and water circulation system, characterized in that: include: The sand and water collection mechanism comprises a sand and water collection tank and a return structure for returning material to the sand and water collection tank. The sand and water collection tank comprises a sedimentation tank and a return water tank. The upper layer solution of the sedimentation tank can flow to the return water tank. A sand outlet is provided at the bottom of the sedimentation tank. The sand outlet is connected to a clean water pipeline and a sand and water projection pipeline respectively through a sand mixing valve. The sand and water projection pipeline is connected to the return structure. The sand and water collection tank is provided with at least one wave suppression plate capable of disturbing the sand and water medium in the sedimentation tank. A cyclone separator having a sewage inlet, a sewage outlet, and a steel grit outlet, wherein the sewage inlet is connected to the return water tank, and the steel grit outlet is connected to the sedimentation tank; A sewage treatment device, comprising a sewage filter and a water tank, wherein the sewage filter is arranged inside the water tank, the inlet of the water tank is connected to the sewage outlet of the cyclone separator, and the clean water outlet of the water tank is connected to the clean water pipeline; Fixed plates are provided on both side walls of the sedimentation tank, and the wave suppression plate is movably provided between two opposite fixed plates, and a plurality of water holes are provided on the wave suppression plate; A spray device is provided on the top of the sand and water collection tank. The spray device has a plurality of spray heads arranged above the sedimentation tank and the return water tank and used for eliminating foam generated in the tank.

2. The sand and water circulation system according to claim 1, characterized in that: A plurality of water holes are provided on the fixing plate.

3. The sand and water circulation system according to claim 1 or 2, characterized in that: The wave suppression plate is provided with at least three layers of water hole groups at intervals along the height direction thereof, and each layer of the water hole group has a plurality of the water holes provided along the length direction of the wave suppression plate.

4. The sand and water circulation system according to claim 3, characterized in that: The flow areas of the multiple water holes on the wave suppression plate are the same; or, the flow areas of the multiple water holes in the water hole groups on each layer of the wave suppression plate gradually decrease along the height direction of the wave suppression plate.

5. The sand and water circulation system according to claim 1 or 2, characterized in that: The shape of the water hole is circular, polygonal, arc-polygonal or cross-shaped.

6. The sand-water circulation system according to claim 1, characterized in that: A sand quantity regulating valve is connected between the sand outlet of the sedimentation tank and the sand mixing valve.

7. The sand and water circulation system according to claim 6, characterized in that: The sedimentation tank has multiple sand outlets, each of which is connected to a sand mixing valve. The clean water pipeline is connected to a water flow distribution pipeline, which is connected to multiple sand mixing valves. A water flow regulating valve is provided on the water flow distribution pipeline.

8. The sand and water circulation system according to claim 7, characterized in that: After adjustment by the sand amount regulating valve and the water amount regulating valve, the mass ratio of water to sand entering the sand mixing valve is 1:0.1~4, the volume ratio of water to sand entering the sand mixing valve is 1:0.2~0.6, and the flow rate of the sand-water mixed slurry at the outlet of the sand mixing valve is 200kg / min~900kg / min.

9. The sand and water circulation system according to claim 1, characterized in that: A sand discharge hole is provided on the side wall of the sand and water collection trough, and an abrasive supply device is provided on the upper part of the sand and water collection trough; the abrasive supply device includes an abrasive bin and a screw conveyor connected to the abrasive bin, the screw conveyor is located at the upper part of the sedimentation tank, and an abrasive bin regulating valve is provided at the outlet of the abrasive bin.

10. The sand and water circulation system according to claim 1, characterized in that: The material return structure has a discharge chute, and a discharge regulating valve is provided at the discharge port of the discharge chute.

11. The sand-water circulation system according to claim 1, characterized in that: A first sewage regulating valve is provided at the sewage outlet of the return water tank, a second sewage regulating valve is provided at the sewage inlet of the cyclone separator, a flow regulating valve is provided at the sewage outlet of the cyclone separator, and a return sand regulating valve is provided at the steel sand outlet of the cyclone separator.

12. The sand and water circulation system according to claim 1, characterized in that: The bottom of the water tank is connected with a sewage pipeline, the outlet of the sewage pipeline is connected to the waste bucket, and the sewage pipeline is connected with a sewage valve.

13. The sand and water circulation system according to claim 1, characterized in that: An overflow structure is provided between the sedimentation tank and the return water tank, and the overflow structure is a sawtooth overflow plate or an overflow inclined plate.

14. The sand and water circulation system according to claim 1, characterized in that: The diameter of the solid particles circulating in the sand and water circulation system is 0.30 mm to 0.8 mm.

15. The sand and water circulation system according to claim 1, characterized in that: The solid particles circulating in the sand-water circulation system are made of steel sand, steel shot, steel chips, glass beads, garnet, sand or brown corundum.

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