A device for washing and removing dust from machine-made sand

Abstract

The utility model relates to the technical field of construction accessory device, especially a kind of for machine-made sand washing dust removal device, it include: hopper, the hopper is set below raw material conveyor belt;Vibrating screen, the vibrating screen is set below the hopper, and the vibrating screen is connected in finished product bin;Sewage tank, the sewage tank is set below the vibrating screen;Sand extraction pipeline, sand extraction pipeline both ends are connected the hopper and the sewage tank respectively, and sand extraction pipeline is used to send the sand deposited in the sewage tank to the hopper;Sewage treatment tank, the sewage treatment tank and the sewage tank are communicated, and the sewage treatment tank is provided with recovery pipeline, and recovery pipeline both ends are connected the hopper and the sewage treatment tank respectively.This application, overcome the existing technology in the machine-made sand washing when easy to cause a large amount of stone powder and fine particles are washed off, so that the gradation of machine-made sand is poor, thereby affecting the performance of the mixed concrete of the deficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of construction auxiliary devices, and in particular to a dust removal device for washing manufactured sand. Background Technology

[0002] With the expansion of infrastructure projects and the increasing scarcity of natural sand resources, manufactured sand is being widely used in the construction industry. However, the quality of manufactured sand varies greatly, especially the stone powder content, which is difficult to control and has a significant impact on the workability of concrete. Using wheel-type or screw-type sand washing machines requires specific site conditions and is difficult to control the stone powder content, often resulting in the washing away of large amounts of stone powder and fine particles. This artificially reduces the stone powder content, leading to poor gradation of the manufactured sand and consequently affecting the performance of the mixed concrete. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where a large amount of stone powder and fine particles are easily washed away during the washing of manufactured sand, resulting in poor gradation of the manufactured sand and thus affecting the performance of the mixed concrete. This invention provides a dust removal device for washing manufactured sand.

[0004] In a first aspect, the present invention provides a dust removal device for washing manufactured sand, comprising: The funnel is positioned below the raw material conveyor belt; A vibrating screen is disposed below the funnel and connected to the finished product silo. A wastewater tank is located below the vibrating screen; A sand-dredging pipe, with its two ends connected to the funnel and the sewage tank respectively, is used to pump the sand settled in the sewage tank to the funnel; A wastewater treatment pond is provided, which is connected to the wastewater tank. The wastewater treatment pond is equipped with a recovery pipe, and the two ends of the recovery pipe are respectively connected to the funnel and the wastewater treatment pond.

[0005] The funnel, positioned below the raw material conveyor belt, allows for the addition of water for initial mixing and rinsing. Solid-liquid separation is then achieved via a vibrating screen. Lost fine sand and treated water are recovered and reused through sand extraction and recycling pipes, minimizing waste of stone powder and fine particles, improving resource utilization, and controlling stone powder content within acceptable limits to avoid affecting the gradation of the manufactured sand. Water washing reduces dust pollution and allows for water recycling, promoting green construction.

[0006] Preferably, the device further includes a chute, the inlet of which is connected to the outlet of the funnel, and the outlet of which is connected to the vibrating screen. The inlet of the chute is located at a higher position than the outlet of the chute.

[0007] If a chute is installed with the inlet higher than the outlet, the material can enter the vibrating screen by gravity.

[0008] Preferably, the inlet of the vibrating screen is located lower than the outlet of the vibrating screen.

[0009] The inlet of the vibrating screen is lower than the outlet, which prolongs the residence time and movement path of the material on the screen surface, so that the material can be screened as much as possible.

[0010] Preferably, the sand-dredging pipe is connected to the side of the sewage treatment tank near the bottom of the tank.

[0011] By placing the inlet of the sand extraction pipe on the side of the sewage tank near the bottom, it is possible to directly extract the fine sand that has settled and concentrated at the bottom of the sewage tank, which helps to improve the sand separation efficiency.

[0012] Preferably, the system also includes a sewage pipe, with its two ends connected to the sewage tank and the sewage treatment pool, respectively, and the inlet of the sewage pipe being higher than the inlet of the sand dredging pipe.

[0013] Setting up higher sewage pipes in conjunction with lower sand-dredging pipes facilitates the stratification and diversion of liquid within the sewage tank.

[0014] Preferably, the sewage pipe is equipped with a filter screen.

[0015] Installing a filter screen can intercept larger solid particles or debris that flow with the upper layer of sewage, preventing them from entering the sewage treatment tank or causing pipe blockage. This reduces the frequency of sludge removal and maintenance costs of the sewage treatment tank, and ensures the smooth flow of water throughout the entire system.

[0016] Preferably, the vibrating screen is connected to the finished product silo via a conveyor belt.

[0017] Preferably, the vibrating screen has at least two layers of screen mesh inside.

[0018] It is equipped with multiple screens, which can classify manufactured sand into multiple grades.

[0019] Preferably, the inlet of the sand pumping pipe is equipped with a slurry pump.

[0020] Preferably, the wastewater tank is equipped with an inlet valve.

[0021] The inlet valve is designed to wash and suspend the settled fine sand, preventing it from caking and allowing it to work in conjunction with the water pump to adjust the concentration to a suitable level for pumping.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a dust removal device for washing manufactured sand, comprising a funnel, a vibrating screen, a wastewater tank, a sand pumping pipe, and a wastewater treatment pond. The funnel is positioned below the raw material conveyor belt and allows for the addition of water for preliminary concrete mixing and washing. The vibrating screen then achieves solid-liquid separation. The sand pumping pipe and the recovery pipe respectively recycle the lost fine sand and the treated clean water, minimizing the waste of stone powder and fine particles, improving resource utilization, controlling the stone powder content within acceptable limits, and reducing dust pollution. The wastewater undergoes sedimentation treatment in the wastewater treatment pond, allowing for water recycling and promoting green construction. This invention overcomes the shortcomings of existing technologies where washing manufactured sand easily results in the loss of large amounts of stone powder and fine particles, leading to poor gradation of the manufactured sand and affecting the performance of the mixed concrete. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a dust removal device for washing manufactured sand according to the present invention. Figure 1 ; Figure 2 This is a process flow diagram of the present invention; Figure 3 This is a schematic diagram of a dust removal device for washing manufactured sand according to the present invention. Figure 2 .

[0024] icon: 1-Function funnel, 2-Vibrating screen, 3-Sewage tank, 4-Sand pumping pipe, 5-Sewage treatment pool, 6-Channel, 7-Finished material silo, 8-Recycling pipe, 9-Sewage pipe, 10-Conveyor belt. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0026] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0028] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0029] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0030] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0031] Example 1 like Figures 1-3 As shown, a dust removal device for washing manufactured sand includes: Funnel 1, wherein the funnel 1 is disposed below the raw material conveyor belt; Vibrating screen 2 is located below the funnel 1 and is connected to the finished product silo 7; Wastewater tank 3 is located below the vibrating screen 2; Sand pumping pipe 4, with its two ends connected to the funnel 1 and the sewage tank 3 respectively, is used to pump the sand settled in the sewage tank 3 to the funnel 1. Wastewater treatment tank 5 is connected to wastewater tank 3. Wastewater treatment tank 5 is equipped with a recovery pipe 8, and the two ends of the recovery pipe 8 are respectively connected to funnel 1 and wastewater treatment tank 5.

[0032] Funnel 1 is positioned below the raw material conveyor belt, allowing for the addition of water for initial concrete preparation and rinsing. Solid-liquid separation is then achieved via vibrating screen 2. Through sand extraction pipe 4 and recovery pipe 8, lost fine sand and treated clean water are recycled, minimizing waste of stone powder and fine particles, improving resource utilization, controlling stone powder content within acceptable limits, and reducing dust pollution. Water recycling also promotes green construction.

[0033] Furthermore, it also includes a chute 6, the inlet of which is connected to the outlet of the funnel 1, and the outlet of the chute 6 is connected to the vibrating screen 2. The inlet of the chute 6 is located at a higher position than the outlet of the chute 6. By setting the chute 6 with the inlet higher than the outlet, the material can enter the vibrating screen 2 by gravity.

[0034] Furthermore, the inlet of the vibrating screen 2 is located lower than the outlet of the vibrating screen 2. This lower inlet extends the residence time and movement path of the material on the screen surface, allowing for optimal material separation.

[0035] Furthermore, the sand extraction pipe 4 is connected to the side of the sewage treatment tank 5 near the bottom. By placing the inlet of the sand extraction pipe 4 on the side of the sewage tank 3 near the bottom, it is possible to directly extract the fine sand that has settled and concentrated at the bottom of the sewage tank 3, which helps to improve the fine sand extraction efficiency.

[0036] Furthermore, it also includes a sewage pipe 9, with its two ends connected to the sewage tank 3 and the sewage treatment pond 5, respectively. The inlet position of the sewage pipe 9 is higher than the inlet position of the sand dredging pipe 4. Setting the sewage pipe 9 higher and cooperating with the sand dredging pipe 4 facilitates the stratification and diversion of the liquid in the sewage tank 3.

[0037] Furthermore, the sewage pipe 9 is equipped with a filter screen ( Figures 1-3 (Not shown in the middle). A filter screen is installed at the inlet to intercept larger solid particles or debris flowing with the upper sewage, preventing them from entering the sewage treatment tank 5 or causing pipe blockage. This reduces the frequency of sludge removal and maintenance costs of the sewage treatment tank 5, and ensures the smooth flow of water throughout the system.

[0038] Furthermore, the vibrating screen 2 is connected to the finished product silo 7 via a conveyor belt 10.

[0039] Furthermore, the vibrating screen 2 is equipped with at least two layers of screens, which can perform multi-level grading of manufactured sand.

[0040] Furthermore, a slurry pump is installed at the inlet of the sand dredging pipe 4. Figure 2 and Figure 3 (Not shown in the image).

[0041] Furthermore, the wastewater tank 3 is equipped with an inlet valve. The inlet valve ( Figures 1-3 (Not shown in the image), it can wash and suspend precipitated fine sand, prevent it from caking, and work in conjunction with the water pump to adjust it to a suitable pumping concentration.

[0042] In actual use, the specific parameters of each device are as follows.

[0043] A circular iron funnel 1, which can be made of 3mm steel plate with a diameter of 50cm, is installed at the outlet of the manufactured sand. An adjustable water inlet valve is installed above the funnel 1 to regulate the flow rate of the flushing water, thereby adjusting the stone powder content. A sluice 6 is provided below the funnel 1. The height and width of the sluice 6 are both 30cm, and it is connected to the vibrating screen 2. The sluice 6 serves as a channel for the mixture of manufactured sand and water to flow into the vibrating dewatering screen, and plays a role in fully mixing and initially separating the manufactured sand and water.

[0044] Vibrating screen 2 can be a common model, with an additional layer of rubber screen plate installed on the screen mesh. The screen plate aperture should be 0.1mm, not too large, to prevent excessive loss of fine particles of manufactured sand; it should not be too small, as this would make it difficult for sewage to be discharged and clog the screen mesh.

[0045] When installing vibrating screen 2, the outlet should be higher than the inlet and have a certain angle to facilitate thorough dewatering.

[0046] A conveyor belt 10 is connected below the vibrating dewatering screen.

[0047] Wastewater tank 3 is installed below the vibrating dewatering screen to receive wastewater and fine sand mixture from below the dewatering screen. Wastewater tank 3 should also be installed at a certain angle.

[0048] A slurry pump is installed at the bottom of the sewage tank 3 and connected through the recovery pipe 8. It can pump the settled fine sand into the funnel 1 to recover the fine sand.

[0049] The sewage tank 3 is equipped with an overflow hole at the top and is connected to the sewage pool through the sewage pipe 9, so that the turbid sewage containing stone powder can be directly discharged into the sewage pool for sedimentation.

[0050] The bottom of sewage tank 3 is equipped with a sewage outlet for cleaning various sediments, etc.

[0051] The wastewater tank 3 is equipped with an inlet valve in the middle, which is used to wash and suspend the settled fine sand, etc., so as to facilitate the full recycling of fine sand.

[0052] The wastewater treatment terminal is equipped with a three-stage sedimentation tank to filter and settle wastewater containing stone powder. The purified water after the three-stage sedimentation treatment can be reused as a source of water for washing manufactured sand.

[0053] Preferably, in actual use, the sewage tank 3 can also be equipped with an inclined guide plate. Figures 1-3 (Not shown in the image), the guide plate is located between the inlet of the sewage pipe 9 and the inlet of the sand pumping pipe 4, and is used to guide the water flow and accelerate the settling of solid particles. Adding the guide plate can optimize the flow field within the sewage tank, smooth the water flow, create better settling conditions for fine sand particles, further improve the efficiency of "sand-mud separation," thereby increasing the concentration of slurry recovered from the sand pumping pipe and the clarity of the sewage discharged from the sewage pipe.

[0054] Furthermore, the recycling pipe 8 is equipped with branch pipes ( Figures 1-3 (Not shown in the image), the outlet of the branch pipe points to the screen surface of the vibrating screen 2, and is used to provide screen washing water. Using treated recycled water to backwash the vibrating screen surface can effectively prevent screen hole clogging, maintain screening efficiency, further realize the recycling of water resources, and reduce downtime for cleaning.

[0055] Furthermore, the inner wall of the chute 6 is lined with a wear-resistant liner. Figures 1-3 (Not shown in the image), which can significantly improve the wear resistance of the chute under the scouring of high-speed sand and water flow, reduce maintenance frequency and cost, and ensure the continuity of production.

[0056] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust removal device for washing manufactured sand, characterized in that, include: Funnel (1), wherein the funnel (1) is disposed below the raw material conveyor belt; Vibrating screen (2), the vibrating screen (2) is located below the funnel (1), and the vibrating screen (2) is connected to the finished product silo (7). Wastewater tank (3), which is located below the vibrating screen (2); A sand-dredging pipe (4) is provided, with the two ends of the sand-dredging pipe (4) connected to the funnel (1) and the sewage tank (3) respectively. The sand-dredging pipe (4) is used to pump the sand that has settled in the sewage tank (3) to the funnel (1). Wastewater treatment tank (5) is connected to the wastewater tank (3). The wastewater treatment tank (5) is equipped with a recycling pipe (8). The two ends of the recycling pipe (8) are respectively connected to the funnel (1) and the wastewater treatment tank (5).

2. The dust removal device for washing manufactured sand according to claim 1, characterized in that, It also includes a chute (6), the inlet of which is connected to the outlet of the funnel (1), and the outlet of which is connected to the vibrating screen (2). The inlet of the chute (6) is located at a higher position than the outlet of the chute (6).

3. The dust removal device for machine-made sand washing according to claim 1, characterized in that, The inlet of the vibrating screen (2) is located at a position lower than the outlet of the vibrating screen (2).

4. The dust removal device for machine-made sand washing according to claim 1, characterized in that, The sand dredging pipe (4) is connected to the side of the sewage treatment tank (5) near the bottom of the tank.

5. A dust removal device for washing manufactured sand according to claim 4, characterized in that, It also includes a sewage pipe (9), the two ends of which are connected to the sewage tank (3) and the sewage treatment pool (5) respectively, and the inlet position of the sewage pipe (9) is higher than the inlet position of the sand pumping pipe (4).

6. A dust removal device for washing manufactured sand according to claim 5, characterized in that, The sewage pipe (9) is equipped with a filter screen.

7. A dust removal device for washing manufactured sand according to any one of claims 1-6, characterized in that, The vibrating screen (2) is connected to the finished product silo (7) via a conveyor belt (10).

8. A dust removal device for washing manufactured sand according to any one of claims 1-6, characterized in that, The vibrating screen (2) has at least two layers of screen mesh inside.

9. A dust removal device for washing manufactured sand according to any one of claims 1-6, characterized in that, The inlet of the sand dredging pipe (4) is equipped with a slurry pump.

10. A dust removal device for washing manufactured sand according to any one of claims 1-6, characterized in that, The sewage tank (3) is equipped with an inlet valve.

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