Wet regeneration system

Abstract

The utility model discloses a wet regeneration system which comprises a sand washing working part, a water control working part and a belt conveyor, sand to be regenerated is mixed with water in the sand washing working part and cleaned, a sand-water mixture is discharged into the water control working part, the water control working part can control liquid in the mixture, coarse dehydration of the sand is achieved, and the belt conveyor is used for conveying the sand to be regenerated. The belt conveyor is in butt joint with the sand washing work part and the water control work part and extends to the downstream of the water control work part, the belt conveyor can receive materials output by the water control work part, and the belt conveyor can adjust the conveying state of the belt conveyor according to the water control condition of the materials so that water-controlled washed sand can be conveyed to the downstream conveniently, or mortar without complete water control can be conveyed to the upstream conveniently. Therefore, the problem that mortar exists after the water control work part is subjected to water control treatment and is not easy to treat is solved.

Description

Technical Field

[0001] The present application relates to the field of waste sand regeneration equipment, and in particular to a wet regeneration system. Background Art

[0002] Modeling sand is an important material used in the preparation of castings. Modeling sand is used to construct sand molds. By pouring metal solution into the sand mold, castings can be obtained. In order to ensure the stability of the sand mold and prevent the sand mold from deforming during the pouring process, a variety of chemical reagents need to be added to the sand before molding. Sand can be recycled. Before reuse, the modeling sand needs to be regenerated to remove the chemical reagent residues originally attached to the sand particles.

[0003] Wet regeneration is a common sand regeneration treatment method. It is a method of cleaning sand with liquid to remove chemical reagent residues on the sand surface. During the wet regeneration process, after the sand is mixed with water, water control is required. After the liquid in the mortar is removed by water control, the sand is discharged into the drying equipment for drying. However, in general, after water control, the sand near the outlet is often still in a state of mixing with the liquid. If this part of the mortar is directly discharged into the drying equipment, it will affect the drying efficiency and drying effect. If this part of the mortar is discharged, it will cause a waste of sand. Summary of the invention

[0004] The purpose of this application is to overcome the deficiencies in the prior art and provide a wet regeneration system.

[0005] To achieve the above technical objectives, the present application provides a wet regeneration system, comprising: a sand washing section, for washing the sand to be regenerated; a water control section, arranged downstream of the sand washing section, for receiving a sand-water mixture and for separating sand and water; a belt conveyor, connecting the sand washing section and the water control section and extending downstream of the water control section; wherein the belt conveyor includes a forward conveying state and a reverse conveying state; when the belt conveyor is in the forward conveying state, it can receive the washed sand output by the water control section and can convey the washed sand downstream; when the belt conveyor is in the reverse conveying state, it can receive the mortar output by the water control section and can convey the mortar to the sand washing section, so that the mortar can enter the water control section again for separation of sand and water.

[0006] Furthermore, the sand washing section includes: a first-level sand washing machine for mixing sand and water to facilitate sand cleaning; a turnover tank for receiving the sand-water mixture discharged by the first-level sand washing machine; and a first conveying mechanism for conveying the sand-water mixture in the turnover tank to the water control section.

[0007] Furthermore, the sand washing section also includes: a secondary sand washing machine, which is arranged downstream of the primary sand washing machine; a second conveying mechanism, which connects the primary sand washing machine and the secondary sand washing machine and is used to input the sand-water mixture after the primary mixing into the secondary sand washing machine to facilitate the secondary mixing of the sand-water mixture.

[0008] Furthermore, the water control unit includes: a sand bin for receiving a sand-water mixture; and a sewage tank for receiving water discharged from the sand bin.

[0009] Furthermore, the wet regeneration system also includes a drying section, which is arranged downstream of the water control section and connected to the belt conveyor. The drying section is used to receive the washed sand and dry and dehydrate the washed sand.

[0010] Furthermore, the drying section includes: a three-pass dryer for drying washed sand; a transfer hopper for receiving dried sand discharged from the three-pass dryer; a weight valve provided in the transfer hopper. After the dried sand accumulates on the weight valve, the weight valve can be flipped and then pass through the transfer hopper.

[0011] Furthermore, the drying section also includes: a transfer material pipe, which is connected to the three-pass drying machine and the transfer material hopper; and an exhaust pipe, one end of which is connected to the negative pressure device and the other end is connected to the transfer material pipe.

[0012] Furthermore, the wet regeneration system also includes a screening machine, which is arranged downstream of the drying section and is used to vibrate and screen the dried sand to remove impurities.

[0013] Furthermore, the wet regeneration system also includes a sand temperature regulator, which is arranged downstream of the screening machine and is used to adjust the temperature of the screened sand.

[0014] Furthermore, the wet regeneration system also includes a sand storage, which is arranged downstream of the sand temperature regulator and is used to store sand.

[0015] The present application provides a wet regeneration system, including a sand washing section, a water control section and a belt conveyor. The sand to be regenerated is mixed with water and washed in the sand washing section, and the sand-water mixture is discharged into the water control section. The water control section can control the liquid in the mixture to achieve rough dehydration of the sand. The belt conveyor connects the sand washing section and the water control section and extends to the downstream of the water control section. The belt conveyor can receive the material output by the water control section. According to the water control situation of the material, the belt conveyor can adjust its own conveying state so as to send the water-washed sand that has completed water control to the downstream, or send the mortar that has not been completely water-controlled back to the upstream; by setting up the belt conveyor, the problem that the mortar exists in the water control section after the water control treatment and the mortar is not easy to handle is solved. By reverse conveying, the belt conveyor can send the mortar back to the sand washing section, so that the mortar goes to the water control section with the sand-water mixture to receive water control treatment, thereby avoiding waste of sand; at the same time, by forward conveying, the belt conveyor can also serve as a transfer transmission mechanism, connecting the water control section and the downstream equipment in series to achieve normal circulation of the water-washed sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the structure of a wet regeneration system provided in this application;

[0017] Figure 2 for Figure 1 Schematic diagram of the partial structure of the medium-wet regeneration system;

[0018] Figure 3 for Figure 1 Schematic diagram of the top view of the medium-wet regeneration system. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0020] The present application provides a wet regeneration system, comprising: a sand washing section 10, for washing sand to be regenerated; a water control section 20, disposed downstream of the sand washing section 10, for receiving a sand-water mixture and for separating sand and water.

[0021] Specifically, the sand to be regenerated is discharged into the sand washing section 10, where the sand is mixed with water, and the water washes the sand to remove the chemical reagent residue on the surface of the sand. After passing through the sand washing section 10, the sand-water mixture is discharged into the water control section 20, which can control the liquid in the mixture to achieve rough dehydration of the sand, so as to facilitate subsequent drying and fine dehydration of the sand.

[0022] It should be added that the liquid used to mix with the sand and wash the sand can be ordinary clean water, or clean water with special reagents added to specifically remove chemical residues on the surface of the sand. The present application does not limit the specific composition of the sand-water mixture.

[0023] It should be explained that the water control unit 20 can achieve rapid water control of the sand-water mixture by means of sedimentation drainage, medium water absorption, etc. Since both sand and water have the movement to flow to the outlet, after water control, the sand near the outlet is usually still in a mortar state mixed with water; that is, the water content of the sand near the outlet is relatively high. If this part of the sand is directly discharged downstream, it will affect the drying efficiency and drying effect of the downstream.

[0024] To this end, the wet regeneration system provided in the present application also includes a belt conveyor 30, which is connected to the sand washing section 10 and the water control section 20 and extends downstream of the water control section 20; wherein the belt conveyor 30 includes a forward conveying state and a reverse conveying state; when the belt conveyor 30 is in the forward conveying state, it can receive the washed sand output by the water control section 20 and can convey the washed sand downstream; when the belt conveyor 30 is in the reverse conveying state, it can receive the mortar output by the water control section 20 and can convey the mortar to the sand washing section 10, so that the mortar can enter the water control section 20 again for separation of sand and water.

[0025] Specifically, the belt conveyor 30 can receive the material output by the water control section 20. According to the water control situation of the material, the belt conveyor 30 can adjust its own conveying state so as to send the washed sand that has completed water control to the downstream, or send the mortar that has not been completely water controlled back to the upstream.

[0026] In one embodiment, after the water control section 20 completes the water control treatment of a batch of sand-water mixture, the outlet of the water control section 20 is opened; at this time, the outlet first discharges the mortar that is still mixed with water and has a higher water content; the belt conveyor 30 is in a reverse conveying state, and after receiving the mortar, it discharges the mortar back to the sand washing section 10. When the sand washing section 10 feeds the water control section 20, the discharged mortar can go to the water control section 20 again to receive a new round of sand-water separation; after discharging the bottom mortar, the remaining sand is washed sand with a good water control effect, and the belt conveyor 30 is converted into a forward conveying state, and after receiving the washed sand, it sends the washed sand to the downstream.

[0027] By setting up the belt conveyor 30, the problem that there is mortar in the water control section 20 after water control treatment and the mortar is difficult to handle is solved. Through reverse conveying, the belt conveyor 30 can send the mortar back to the sand washing section 10, so that the mortar can go to the water control section 20 with the sand-water mixture to receive water control treatment, thereby avoiding waste of sand; at the same time, through forward conveying, the belt conveyor 30 can also serve as a transfer transmission mechanism, connecting the water control section 20 and downstream equipment in series to achieve normal circulation of washed sand.

[0028] More specifically, the belt conveyor 30 includes a driving wheel, a driven wheel, a conveyor belt sleeved on the driving wheel and the driven wheel, and a driving member (such as a motor, etc.) for driving the driving wheel to rotate. The conveyor belt passes through the sand washing section 10 and the water control section 20 and extends downstream of the water control section 20; when the driving member works in the forward direction, the driving wheel and the driven wheel cooperate to realize the flow of the conveyor belt to the downstream of the water control section 20; when the driving member works in the reverse direction, the driving wheel and the driven wheel cooperate to realize the flow of the conveyor belt to the sand washing section 10.

[0029] Optionally, the conveyor belt surface is provided with anti-skid patterns, which can increase the roughness of the conveyor belt surface, thereby preventing materials from slipping on the conveyor belt or falling off the conveyor belt, thereby ensuring the conveying stability of the conveyor belt.

[0030] Optionally, the belt conveyor 30 further comprises a fence, and the conveyor belt is arranged between two fences. The fence is used to limit the position and conveying direction of the material on the conveyor belt to ensure that the material accurately returns to the upstream or moves downstream.

[0031] In one embodiment, the sand washing section 10 includes a primary sand washing machine 11, which is used to mix sand and water to facilitate sand washing.

[0032] Specifically, the first-stage sand washing machine 11 includes a sand barrel and a stirring blade, and the stirring blade is rotatably arranged in the sand barrel. When washing sand, sand and water enter the sand barrel, and the stirring blade rotates to promote the mixing of sand and water. The sand and water are stirred by the stirring blade, and can also form a vortex to feed downstream and promote water to wash the sand.

[0033] Optionally, the first-stage sand washing machine 11 further includes a feed hopper, which is connected to the inlet of the sand barrel and is configured in a cone shape. The closer to the inlet of the sand barrel, the smaller the diameter of the feed hopper. The tapered configuration makes the opening of the feed hopper large and convenient for materials to enter. At the same time, the outlet of the feed hopper is small, which is convenient for guiding the materials to flow into the sand barrel.

[0034] Optionally, the first-stage sand washing machine 11 includes two groups of sand barrels, which are arranged side by side and have an overflow plate between them, and stirring blades are provided in both groups of sand barrels; an inlet is provided at the top of the first group of sand barrels, and sand and water enter the first group of sand barrels through the inlet and are stirred and mixed by the stirring blades; after the sand-water mixture contained in the first group of sand barrels is higher than the overflow plate, the sand-water mixture flows into the second group of sand barrels and is stirred and mixed by the stirring blades again; an outlet is provided at the top of the second group of sand barrels, and after the sand-water mixture in the second group of sand barrels accumulates to the outlet height, it can flow out through the outlet. Such an arrangement can increase the flow path of sand and water in the first-stage sand washing machine 11, thereby increasing the mixing time of sand and water, and thus ensuring the sand washing effect.

[0035] Optionally, the sand washing section 10 further includes a turnover tank 12 for receiving the sand-water mixture discharged from the primary sand washing machine 11 .

[0036] For details, please refer to Figure 1 and Figure 2 In the illustrated embodiment, the turnover pool 12 is a pit dug directly below the sand washing machine, and the sand-water mixture passing through the sand washing machine is discharged into the turnover pool 12. The turnover pool 12 can not only temporarily store the sand-water mixture and compensate for the upstream and downstream processing rhythm, but also increase the mixing space of sand and water, extend the mixing time of sand and water, and further ensure the sand washing effect.

[0037] When the belt conveyor 30 is in the reverse conveying state, the mortar can be input into the sand washing machine, or the mortar can be input into the turnover pool 12.

[0038] Optionally, the sand washing section 10 further includes a first conveying mechanism 13 for conveying the sand-water mixture in the turnover tank 12 to the water control section 20 .

[0039] The present application does not limit the specific configuration of the first conveying mechanism 13 , as long as it can extract the sand-water mixture in the turnover pool 12 and deliver it to the water control section 20 .

[0040] For example, the first conveying mechanism 13 may adopt bucket conveying and / or screw conveying equipment.

[0041] In a specific embodiment, the first conveying mechanism 13 includes a submersible sand pump and a conveying pipe, which connects the turnover pool 12 and the water control unit 20. The submersible sand pump can provide suction, extract the sand-water mixture in the turnover pool 12, and make the sand-water mixture move along the conveying pipe toward the water control unit 20.

[0042] Optionally, the sand washing section 10 further includes a secondary sand washing machine 14 , which is disposed downstream of the primary sand washing machine 11 .

[0043] The configuration of the secondary sand washing machine 14 is similar to that of the primary sand washing machine 11, and the details are not repeated here.

[0044] By deploying the secondary sand washing machine 14, the mixing stroke of sand and water can be further increased, and the mixing time of sand and water can be increased, thereby further optimizing the sand washing effect.

[0045] Optionally, the sand washing section 10 further includes a second conveying mechanism 15, which is connected to the primary sand washing machine 11 and the secondary sand washing machine 14, and is used to input the sand-water mixture after the primary mixing into the secondary sand washing machine 14, so as to facilitate the secondary mixing of the sand-water mixture.

[0046] The present application does not limit the specific configuration of the second conveying mechanism 15 , as long as it can convey the sand-water mixture discharged from the primary sand washing machine 11 to the secondary sand washing machine 14 .

[0047] For example, the second conveying mechanism 15 may be a conveyor belt, a bucket elevator, or the like.

[0048] In a specific embodiment, the second conveying mechanism 15 adopts a screw elevator, which includes a conveying cylinder and a spiral blade. The spiral blade is rotatably arranged in the conveying cylinder, and the conveying cylinder is connected to the first-level sand washing machine 11 and the second-level sand washing machine 14; the sand and water mixture discharged by the first-level sand washing machine 11 can enter the conveying cylinder; when the screw elevator is started, the spiral blade rotates, which can promote the sand and water mixture in the conveying cylinder to be spirally fed to the second-level sand washing machine 14.

[0049] Optionally, the second conveying mechanism 15 adopts a spiral elevator, which is inclined on the conveying barrel from the first-stage sand washing machine 11 to the second-stage sand washing machine 14. In this way, during the process of the spiral blade rotating and promoting the sand-water mixture in the barrel to be fed to the second-stage sand washing machine 14, the sand-water mixture makes a climbing motion, which can prevent the sand-water mixture from being actively fed to the second-stage sand washing machine 14 due to inertia or dead weight, which is beneficial to control the conveying time and conveying amount of the sand-water mixture, and can ensure that the sand-water mixture is stirred by the spiral blade. The sand-water mixture is fed forward under the drive of the spiral blade. At the same time, the stirring of the spiral blade can promote the mixing of sand and water, so as to facilitate the water-washing of the sand.

[0050] In a specific embodiment, in combination with reference Figure 1 and Figure 2 The sand washing section 10 includes a primary sand washing machine 11, a second conveying mechanism 15 and a secondary sand washing machine 14. Both the primary sand washing machine 11 and the secondary sand washing machine 14 include two sets of sand cylinders, and the second conveying mechanism 15 adopts a spiral elevator. At this time, the sand and water are stirred for at least five rounds in the sand washing section 10, the mixing effect of the sand and the water is good, and the washing effect of the water on the sand is good.

[0051] In one embodiment, the water control unit 20 includes: a sand bin 21 for receiving a sand-water mixture; and a sewage pool 22 for receiving water discharged from the sand bin 21 .

[0052] In this embodiment, the sand bin 21 is used to receive the sand-water mixture; the sand-water mixture can be deposited in the sand bin and naturally stratify into sand and water under the influence of its own weight and density. Generally speaking, the sand will be deposited below the water, and a drainage pipe is provided at the position of the sand bin 21 corresponding to the water layer; after the sand-water mixture is left in the sand bin 21 for a preset period of time and stratified, the drainage pipe is opened, and a water pump can be used if necessary to facilitate the discharge of water. The drainage pipe is connected to the sewage pool 22, and the discharged water can be released or even purified through the sewage pool.

[0053] Optionally, a guardrail is provided on the top of the sand bin 21 .

[0054] Workers can stand on the top of the sand bin 21 to confirm the feeding and separation of the sand-water mixture, thereby confirming whether the water control section 20 is operating normally. The guardrail can ensure the safety of workers when they are on the top of the sand bin 21.

[0055] Optionally, a ladder is provided on one side of the sand bin 21 , and the ladder is connected to the top of the sand bin 21 , so that workers can enter and exit the top of the sand bin 21 via the ladder.

[0056] Optionally, the wet regeneration system provided in the present application includes two sets of sand bins 21. The additional sand bins 21 are more convenient to coordinate with the processing rhythm of the upstream and downstream, and ensure that the sand-water mixture entering the sand bins 21 has a preset standing time.

[0057] If necessary, the wet regeneration system can also include three or more groups of sand bins 21. Adding sand bins 21 can increase the dehydration time of the sand-water mixture, thereby optimizing the dehydration effect, and can reduce the gas energy consumption of drying and dehydration, thereby saving energy.

[0058] Optionally, two groups of sand bins 21 share a sewage pool 22. Unified drainage and purification are more convenient and cost-saving.

[0059] Furthermore, the wet regeneration system provided in the present application also includes a drying section 40, which is arranged downstream of the water control section 20 and connected to the belt conveyor 30. The drying section 40 is used to receive washed sand and to dry and dehydrate the washed sand.

[0060] It is easy to understand that the washed sand after rough dehydration in the water control section 20 is still wet and cannot be directly used for a second time. It needs to be further dried until the water content of the sand reaches a preset value. After the drying section 40, the sand is finely dehydrated.

[0061] The drying section 40 can dry the washed sand by heating (such as using a coil, a lamp, incineration, etc.), blowing hot air, etc. The present application does not limit the specific drying method of the drying section 40.

[0062] In one embodiment, the drying section 40 includes a three-pass dryer 41, and the three-pass dryer 41 is used to dry the washed sand.

[0063] Specifically, the three-pass dryer 41 includes three drying cylinders with different diameters, the small-diameter drying cylinder is arranged in the medium-diameter drying cylinder, and the medium-diameter drying cylinder is arranged in the large-diameter drying cylinder; during drying, the three drying cylinders are made high-temperature (for example, heating elements such as coils and heating rods are arranged on the cylinders, or high-temperature gas is passed into the cylinders), and the washed sand enters from one end of the small-diameter drying cylinder, moves to the other end of the small-diameter drying cylinder, enters the medium-diameter drying cylinder, and then moves from one end to the other end of the medium-diameter drying cylinder and enters the large-diameter drying cylinder. Finally, it moves from one end to the other end of the large-diameter drying cylinder and leaves the three-pass dryer 41.

[0064] More specifically, three drying drums with different diameters are all capable of rotating, and three drying drums with different diameters are all provided with spiral blades. During the drying process, the drying drums rotate, and the spiral blades drive the washed sand to feed forward.

[0065] The three-pass dryer 41 constructs a serpentine route for sand to move in a limited space by nesting drying cylinders of different diameters. It greatly extends the movement distance and drying time of the washed sand while occupying a small area, which is beneficial to improving the drying effect of the sand.

[0066] Optionally, the drying section 40 also includes: a transfer hopper 42 for receiving dried sand discharged from the three-pass dryer 41; a weight valve 43, which is arranged in the transfer hopper 42. After the dried sand accumulates on the weight valve 43, the weight valve 43 can be flipped and then pass through the transfer hopper 42.

[0067] For details, please refer to Figure 1 In the illustrated embodiment, a transfer hopper 42 is provided below the outlet of the three-pass dryer 41, and the top of the transfer hopper 42 is arranged in a funnel shape to receive the discharged dried sand, gather the dried sand, and guide the dried sand to move downstream. The lower part of the transfer hopper 42 is arranged in a tubular shape, and a weight valve 43 is arranged in the tube; the weight valve 43 includes a valve plate, which is rotatably arranged in the tube and can block the pipe passage; an extension arm is provided on one side of the valve plate, and a counterweight block is provided on the extension arm, and the counterweight block can move along the extension arm, and the load-bearing capacity of the valve plate can be adjusted by adjusting the position of the counterweight block on the extension arm; when the weight of the dried sand borne on the valve plate is less than the pressure of the counterweight block on the valve plate, the rotation torque of the extension arm is greater than the rotation torque of the valve plate, and the valve plate maintains a state of blocking the pipe passage; when the weight of the dried sand borne on the valve plate is greater than the pressure of the counterweight block on the valve plate, the rotation torque of the valve plate is greater than the rotation torque of the extension arm, the valve plate rotates toward the downstream of the pipeline, and the dried sand on the valve plate falls.

[0068] The use of the weight valve 43 can limit the output speed of the dried sand, and can make the discharged dried sand stay in the transfer hopper 42 for a period of time, so as to remove dust or cool the sand.

[0069] Continue to refer to Figure 1 In the illustrated embodiment, a sieve plate is provided in the transfer hopper 42, and sieve holes are provided on the sieve plate. After the dried sand falls into the transfer hopper 42, it is screened by the sieve plate to remove large-area impurities therein; when the dried sand falls and hits the sieve plate, the residue on the surface of the sand can be further removed by mutual friction.

[0070] Continue to refer to Figure 1 A sieve tube is provided under the sieve plate, and a group of weight valves 43 are provided at the end of the sieve tube; the dried sand passing through the sieve plate falls onto the weight valve 43 along the sieve tube. After the weight valve 43 receives a sufficient amount of dried sand, the valve plate flips over and the dried sand leaves the sieve tube.

[0071] Continue to refer to Figure 1 The screen plate and the screen tube are both arranged in the transfer hopper 42, and a second set of weight valves 43 are arranged at the end of the transfer hopper 42. The two sets of weight valves 43 work together to achieve the graded drop of different amounts of sand and the drop of sand layer by layer, thereby controlling the amount and speed of sand output from the drying section 40.

[0072] Optionally, the drying section 40 further includes: a transfer pipe 44 connecting the three-pass drying machine 41 and the transfer hopper 42 ; and an exhaust pipe, one end of which is connected to the negative pressure device and the other end of which is connected to the transfer pipe 44 .

[0073] For details, please refer to Figure 1 and Figure 3 In the illustrated embodiment, the transfer pipe 44 is a three-way pipe, one end of which is connected to the outlet of the three-pass dryer 41, one end is connected to the transfer hopper 42, and the other end is connected to the exhaust pipe. The dried sand discharged from the three-pass dryer 41 will fall into the transfer hopper 42 through the transfer pipe 44. At this time, the negative pressure device evacuates the exhaust pipe to remove light impurities in the dried sand. In addition, the negative pressure device can also evacuate the three-pass dryer 41 through the exhaust pipe and the transfer pipe 44, which can not only extract the dust, particles, and harmful gases generated during the drying process, but also promote the gas circulation in the three-pass dryer 41.

[0074] Furthermore, the drying section 40 further includes an air supply mechanism 45, which can be a blower, for supplying air to the three-pass dryer 41 to ensure the air circulation in the three-pass dryer 41. The air supply mechanism 45 cooperates with the negative pressure device to stabilize the air pressure in the three-pass dryer 41.

[0075] Optionally, the drying section 40 also includes a heating element, which is used to heat the gas output by the gas supply mechanism 45. The gas enters the three-pass dryer 41 after being heated. The high-temperature gas will not affect the drying of the sand by the three-pass dryer 41, but can stabilize the temperature in the three-pass dryer 41, which is beneficial to the drying effect.

[0076] Furthermore, the wet regeneration system provided in the present application also includes a screening machine 51, which is arranged downstream of the drying section 40 and is used to vibrate and screen the dried sand to facilitate screening out impurities.

[0077] Specifically, the screening machine 51 includes a vibrator and a screen plate. The screen plate is provided with screen holes, which can filter out small particles of impurities. When the screening machine 51 is working, the vibrator drives the screen plate to vibrate, and the dried sand is vibrated and fed along the screen plate and moves toward the outlet of the screening machine 51. During the vibration process, the sand and the screen plate collide, rub and rub against each other, and the small particles of impurities in the sand are reliably screened out while further processing the sand surface. Small particles of impurities can be screened out by the screen plate through the screen holes, and sand of suitable volume is vibrated and fed on the screen plate and finally discharged through the outlet.

[0078] Optionally, the wet regeneration system provided in the present application further includes a third conveying mechanism 53 , which is connected to the drying section 40 and the screening machine 51 and is used to input the dried sand into the screening machine 51 .

[0079] The present application does not limit the specific configuration of the third conveying mechanism 53 , as long as it can realize the transportation of dried sand.

[0080] For example, the second conveying mechanism 15 may be a conveyor belt, a bucket elevator, or the like.

[0081] In one specific embodiment, the third conveying mechanism 53 pneumatically delivers the tank.

[0082] Specifically, the pneumatic sending tank includes a tank body and a conveying pipeline; the tank body is connected to the drying section 40 and can receive the dried sand; the conveying pipeline is connected to the tank body and the screening machine 51. Furthermore, the tank body is connected to the air intake device, and during transportation, the compressed gas is input into the tank body, driving the dried sand in the tank body to move along the conveying pipeline toward the screening machine 51.

[0083] Optionally, the wet regeneration system provided in the present application further includes a sand temperature regulator 52, which is disposed downstream of the screening machine 51 and is used to adjust the temperature of the screened sand.

[0084] Specifically, the sand temperature regulator 52 is mainly used to cool the dried sand to room temperature or near room temperature, which is conducive to the natural storage and secondary use of the sand. Of course, if there is a special storage or use need, the sand temperature regulator 52 can also adjust the temperature of the dried sand so that the dried sand has a suitable temperature.

[0085] More specifically, the sand temperature regulator 52 includes a sand storage bin, on which a temperature regulating pipe is provided, and a coolant or a gas-liquid at a specific temperature can exchange heat with the sand storage bin and the sand in the sand storage bin through the temperature regulating pipe.

[0086] In a specific embodiment, referring to Figure 1 The sand temperature regulator 52 includes a sand storage bin, a sieving machine 51 is arranged on the top of the sand storage bin, and the outlet of the sieving machine 51 is connected to the sand storage bin. The sand particles sieved by the sieving machine 51 fall into the sand storage bin and the temperature is adjusted in the sand storage bin.

[0087] Optionally, the wet regeneration system provided in the present application further includes a sand storage, which is disposed downstream of the sand temperature regulator 52 and is used to store sand.

[0088] The sand storage has a large volume to store sand. When needed, the sand is released from the sand storage for use downstream.

[0089] Optionally, the wet regeneration system provided in the present application further includes a fourth conveying mechanism 54, which is connected to the sand temperature regulator 52 and the sand storage, and is used to input the temperature-regulated sand into the sand storage.

[0090] The fourth conveying mechanism 54 is similar to the third conveying mechanism 53 and will not be described in detail.

[0091] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A wet regeneration system, characterized in that: include: A sand washing section (10) is used to wash the sand to be regenerated; A water control section (20) is disposed downstream of the sand washing section (10) and is used to receive a sand-water mixture and to separate sand from water; A belt conveyor (30) connected to the sand washing section (10) and the water control section (20) and extending downstream of the water control section (20); Wherein, the belt conveyor (30) includes a forward conveying state and a reverse conveying state; When the belt conveyor (30) is in the forward conveying state, it is capable of receiving the washed sand output by the water control unit (20) and conveying the washed sand downstream; When the belt conveyor (30) is in the reverse conveying state, it is capable of receiving the mortar output by the water control section (20) and of conveying the mortar to the sand washing section (10), so that the mortar can enter the water control section (20) again for separation of sand and water.

2. The wet regeneration system according to claim 1, characterized in that: The sand washing section (10) comprises: A primary sand washer (11) for mixing sand and water to facilitate sand washing; A turnover tank (12) for receiving the sand-water mixture discharged from the primary sand washer (11); The first conveying mechanism (13) is used to convey the sand-water mixture in the circulation pool (12) to the water control section (20).

3. The wet regeneration system according to claim 2, characterized in that: The sand washing section (10) further comprises: A secondary sand washer (14), arranged downstream of the primary sand washer (11); The second conveying mechanism (15) is connected to the primary sand washing machine (11) and the secondary sand washing machine (14) and is used to input the sand-water mixture after the primary mixing into the secondary sand washing machine (14) so ​​as to facilitate the secondary mixing of the sand-water mixture.

4. The wet regeneration system according to claim 1, characterized in that: The water control unit (20) comprises: A sand bin (21) for receiving a sand-water mixture; The sewage pool (22) is used to receive the water discharged from the sand bin (21).

5. The wet regeneration system according to claim 1, characterized in that: It also comprises a drying section (40), the drying section (40) being arranged downstream of the water control section (20) and connected to the belt conveyor (30), the drying section (40) being used to receive washed sand and to dry and dehydrate the washed sand.

6. The wet regeneration system according to claim 5, characterized in that: The drying section (40) comprises: A three-pass dryer (41) for drying washed sand; A transfer hopper (42) for receiving the dried sand discharged from the three-pass dryer (41); A weight valve (43) is provided in the transfer hopper (42). After the dried sand is accumulated on the weight valve (43), the weight valve (43) can be turned over and then pass through the transfer hopper (42).

7. The wet regeneration system according to claim 6, characterized in that: The drying section (40) further comprises: A transfer pipe (44) connecting the three-pass dryer (41) and the transfer hopper (42); An air extraction pipe, one end of which is connected to the negative pressure device and the other end of which is connected to the transfer pipe (44).

8. The wet regeneration system according to claim 5, characterized in that: It also includes a screening machine (51), which is arranged downstream of the drying section (40) and is used to vibrate and screen the dried sand to remove impurities.

9. The wet regeneration system according to claim 8, characterized in that: It also comprises a sand temperature regulator (52), which is arranged downstream of the screening machine (51) and is used to adjust the temperature of the screened sand.

10. The wet regeneration system according to claim 9, characterized in that: It also includes a sand storage, which is arranged downstream of the sand temperature regulator (52) and is used to store sand.

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