Sand making and washing sewage recycling device

Abstract

The utility model relates to a kind of sand making washing sand sewage recovery treatment device, it includes the vibration screen, scrubbing dehydration all-in-one machine, sewage mixing pool, thickening tank, filter press and the circulating pool by water pipeline intercommunication, still including fine sand recovery pool, reagent storage tank, clean water pool and controller, the feed inlet of the fine sand recovery pool is connected to the sedimentation outlet of the sewage mixing pool, discharge port is connected to the dehydration section of the scrubbing dehydration all-in-one machine, the discharge port of the reagent storage tank is connected to the water pipeline between the sewage mixing pool and concentrated pool, the clean water pool is connected to the circulating pool by water pipeline, circulating pump and concentration detection module are provided on the circulating pool, and first metering pump is respectively provided on the water pipeline of the circulating pool with the filter press and clean water pool, the controller is electrically connected to the circulating pump, concentration detection module and first metering pump.The utility model realizes the balance circulation of recovery water in each pool, and dilutes recovery water containing flocculating agent in excess in circulating pool in the circulation process, both can realize the recycling of water resources, also do not affect the clay content in machine-made sand.

Description

Technical Field

[0001] This utility model relates to the technical field of manufactured sand production, and in particular to a wastewater recycling and treatment device for sand making and washing. Background Technology

[0002] With the booming development of infrastructure construction, the consumption of modern concrete is enormous, and the amount of fine aggregate used has also increased accordingly, generally accounting for about 30% of the concrete volume. Adding the amount of fine aggregate used in building mortar, natural river sand can no longer meet the demands of the construction market. Currently, with the gradual depletion of river sand resources, manufactured sand is being used more and more in ready-mixed concrete. However, some problems also exist, affecting the quality control and widespread application of manufactured sand concrete.

[0003] In the production of manufactured sand, sand washing is an essential step to ensure that the stone powder and mud content of the sand meets the required standards. However, sand washing inevitably consumes a large amount of water resources. To conserve water, sand-making enterprises use flocculants to quickly flocculate and settle wastewater in subsequent wastewater and sewage treatment for recycling. However, due to the simple and crude method of use, a large amount of flocculant remains in the manufactured sand after the recycled water containing flocculant is used to wash it. This has many adverse effects on the quality of concrete and production. How to reduce the mud content in manufactured sand at the source, namely the sand washing stage, while monitoring and eliminating the residual flocculant in the washed sand, is an urgent problem to be solved. Utility Model Content

[0004] The present invention aims to address the aforementioned deficiencies in the existing technology by providing a wastewater recycling and treatment device for sand making and washing. This device achieves balanced circulation of recycled water in each pool and dilutes recycled water containing excessive flocculant in the circulation pool during the circulation process. This not only enables the recycling of water resources but also does not affect the mud content in the manufactured sand.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: A wastewater recycling and treatment device for sand making and washing includes a vibrating screen, a scrubbing and dewatering integrated machine, a wastewater mixing tank, a thickening tank, a filter press, and a circulation tank, all connected by a water supply pipeline. It also includes a fine sand recovery tank, a chemical storage tank, a clear water tank, and a controller. The inlet of the fine sand recovery tank is connected to the sedimentation outlet of the wastewater mixing tank, and its outlet is connected to the dewatering section of the scrubbing and dewatering integrated machine. The outlet of the chemical storage tank is connected to a water supply pipeline between the wastewater mixing tank and the thickening tank. The clear water tank is connected to the circulation tank via a water supply pipeline. The circulation tank is equipped with a circulation pump and a concentration detection module. First metering pumps are respectively installed on the water supply pipelines connecting the circulation tank to the filter press and the clear water tank. The controller is electrically connected to the circulation pump, the concentration detection module, and the first metering pumps.

[0006] By adopting the above technical solution, wastewater can flow and be treated in an orderly manner within the device according to a preset process. The clean water recovered from the circulating tank first rinses the screen surface of the vibrating screen, and then, along with the screened manufactured sand, is fed into the integrated scrubbing and dewatering machine via a water pipeline. Wastewater generated after the manufactured sand dewatering flows into the wastewater mixing tank, where it is thoroughly mixed with flocculant from the chemical storage tank, promoting the sedimentation of impurities in the wastewater. The sedimented wastewater then enters the concentration tank for concentration, further aggregating the impurities. The concentrated wastewater is then filtered by a filter press to completely separate impurities and water. Simultaneously, the fine sand recovery tank can recover the fine sand discharged from the sedimentation outlet of the wastewater mixing tank and transport it back to the dewatering section of the integrated scrubbing and dewatering machine, realizing the reuse of fine sand and improving resource utilization. Furthermore… The clear water tank and the circulating tank are connected by a water supply pipeline, with the clear water tank replenishing the circulating tank with clear water. The concentration detection module on the circulating tank can monitor the concentration of the recycled water in the circulating tank in real time. When the concentration of flocculant in the recycled water exceeds the standard, the controller will control the first metering pump according to the detection result to adjust the amount of clear water flowing from the clear water tank into the circulating tank and the amount of water flowing from the filter press into the circulating tank, thereby diluting the recycled water with excessive flocculant in the circulating tank. Ultimately, the recycled water is evenly circulated between the tanks, ensuring the stability and efficiency of the entire treatment process. The overall design of this device not only realizes the recycling of water resources and reduces water waste, but also, due to the effective treatment of recycled water, does not affect the mud content in the manufactured sand, ensuring the quality of the manufactured sand, and has significant economic and environmental benefits.

[0007] The present invention is further configured such that: a second metering pump is provided on the water supply pipeline of the vibrating screen and the integrated scrubbing and dewatering machine, and the controller is electrically connected to the second metering pump.

[0008] By adopting the above technical solution, when the output of sand making and washing changes or the water quality changes, the controller can flexibly adjust the flow rate of the second metering pump according to preset parameters or real-time monitoring data. For example, when the sand production increases, in order to ensure the cleaning and dewatering effect of the integrated scrubbing and dewatering machine, the controller can increase the flow rate of the second metering pump and increase the amount of water delivered to the integrated scrubbing and dewatering machine. When the water quality is good and not much water is needed for cleaning, the controller can reduce the flow rate of the second metering pump, thereby avoiding waste of water resources. This water volume control not only helps to improve the efficiency and quality of sand making and washing, but also further optimizes the operating cost of the entire wastewater recycling and treatment device, making the whole system more intelligent and energy-saving. At the same time, the stable operation of the second metering pump also ensures the continuity and stability of water supply, providing a strong guarantee for the smooth operation of sand making and washing production.

[0009] The present invention is further configured such that: a third metering pump is installed on the water supply pipeline between the sewage mixing tank and the concentration tank and the reagent storage tank, and the controller is electrically connected to the third metering pump.

[0010] By adopting the above technical solution, when the composition and concentration of wastewater change, the controller can adjust the flow rate of the third metering pump according to preset parameters or real-time monitoring data. For example, when the impurity content in the wastewater is high, the controller can increase the flow rate of the third metering pump, allowing more reagent to be transported from the reagent storage tank to the thickening tank for thorough mixing with the wastewater, thereby improving the coagulation and sedimentation effect of impurities and enhancing the wastewater treatment efficiency of the thickening tank. Conversely, if the impurity content in the wastewater is low, the controller can reduce the flow rate of the third metering pump to avoid excessive use of reagents and reduce treatment costs. This precise control of reagent delivery helps ensure that the ratio of wastewater to reagent in the thickening tank is always at the optimal level, thereby improving the overall wastewater recycling and treatment device's wastewater treatment quality. At the same time, the third metering pump can switch between the wastewater mixing tank and the thickening tank, or between the wastewater mixing tank and the reagent storage tank. Its stable operation ensures the continuity and stability of reagent delivery, providing a reliable guarantee for the effective treatment of wastewater in the thickening tank, enabling sand washing wastewater to be recycled and treated more efficiently and environmentally.

[0011] The present invention is further configured such that: drain valves are respectively provided on the water supply pipes of the integrated scrubbing and dewatering machine, the sewage mixing tank, the concentration tank and the filter press, and the controller is electrically connected to the drain valves.

[0012] By adopting the above technical solutions, during actual operation, when wastewater from the integrated scrubbing and dewatering machine needs to be transported to the wastewater mixing tank, the controller can open or close the corresponding drain valves according to the preset program or real-time monitoring of wastewater volume and water quality, ensuring that wastewater can enter the wastewater mixing tank at an appropriate flow rate and time. For the drain valve between the thickening tank and the filter press, the controller can reasonably adjust the opening and closing of the drain valve according to factors such as the concentration degree of wastewater in the thickening tank and the working status of the filter press, ensuring that the concentrated wastewater can be transported to the filter press for further treatment in a timely and effective manner, improving the working efficiency and treatment effect of the filter press. For the drain valve between the circulation tank and the vibrating screen, the controller can control the opening and closing of the drain valve according to factors such as the water concentration in the circulation tank and the working requirements of the vibrating screen, so that the water in the circulation tank can be transported to the vibrating screen in a timely manner to meet the water requirements for sand washing. Through the opening and closing control of these drain valves, the entire device can realize the orderly flow and treatment of wastewater between various treatment stages, avoiding wastewater accumulation and disorderly discharge, and ensuring the continuity and stability of the sand making and washing wastewater recycling and treatment process.

[0013] The present invention is further configured such that: flow regulating valves are respectively installed on the water supply pipes of the circulating pool and the vibrating screen, and the controller is electrically connected to the flow regulating valves.

[0014] By adopting the above technical solution, the water supply requirements for the vibrating screen vary at different stages of the sand making and washing process. For example, in the initial stage of sand washing, a larger water flow is needed to quickly wash away impurities such as mud from the surface of the sand and gravel. At this time, the controller can increase the opening of the flow regulating valve according to the preset program or the real-time monitoring of the vibrating screen's operating status, so that the water in the circulation tank is delivered to the vibrating screen at a larger flow rate, thereby improving the sand washing efficiency. In the later stage of sand washing, when the impurities on the surface of the sand and gravel have been basically washed away, and only a smaller water flow is needed for further cleaning and rinsing, the controller will correspondingly reduce the opening of the flow regulating valve to avoid wasting water resources. At the same time, when the concentration of water in the circulation tank changes, the controller can also adjust the flow regulating valve accordingly. If the concentration of water in the circulation tank is too high, in order to ensure the sand washing effect, the controller will appropriately increase the opening of the flow regulating valve to increase the replenishment of new water and reduce the concentration of water entering the vibrating screen. Conversely, if the concentration of water in the circulation tank is low, the controller will reduce the opening of the flow regulating valve to maintain a suitable water supply.

[0015] The present invention is further configured such that: a drain valve is provided between the fine sand recovery tank and the sewage mixing tank and the scrubbing and dewatering integrated machine, and the controller is electrically connected to the drain valve.

[0016] By adopting the above technical solution, when the fine sand in the fine sand recovery tank accumulates to a certain level, or when it needs to be cleaned and maintained, the controller can promptly open the drain valve between the fine sand recovery tank and the wastewater mixing tank or the integrated scrubbing and dewatering machine, discharging the material in the fine sand recovery tank to the corresponding treatment area, ensuring the normal operation of the fine sand recovery tank. For the wastewater mixing tank, if the wastewater inside reaches a certain level or the mixing ratio does not meet the requirements for subsequent treatment, the controller can control the drain valve to discharge part of the wastewater to a suitable treatment stage, achieving effective wastewater allocation. After the integrated scrubbing and dewatering machine completes its work, the controller can also open the drain valve to discharge any remaining impurities or wastewater, preparing for the next operation. In this way, all aspects of the entire sand making and washing wastewater recovery and treatment device can work more orderly and collaboratively, improving the automation level and overall operating efficiency of the device, while also reducing the workload and errors of manual operation, further enhancing the wastewater recovery and treatment effect in the sand making and washing process.

[0017] The present invention is further configured such that the filter press is a plate and frame filter press.

[0018] By adopting the above technical solutions, it is beneficial to improve filtration efficiency.

[0019] The present invention is further configured such that the concentration detection module is a hydrometer and a liquid level sensor.

[0020] By adopting the above technical solution, the hydrometer can measure the specific gravity of wastewater, thereby reflecting the content of solid particles and other substances in the wastewater, providing key concentration data for subsequent treatment; the level sensor can monitor the wastewater level in real time, ensuring that the amount of wastewater in the device is within a suitable range; when the hydrometer detects that the wastewater concentration is too high or too low, the controller can adjust the treatment process in a timely manner according to the preset program, such as increasing or decreasing the dosage of reagents, to ensure the wastewater treatment effect; once the level sensor detects that the level exceeds or falls below the set value, the controller can immediately control the corresponding valve to perform drainage or water intake operations, avoiding device malfunctions due to abnormal level; the coordinated work of these two sensors enables the entire sand making and washing wastewater recycling and treatment device to operate more accurately and stably, improving the quality and efficiency of wastewater recycling and treatment, while also reducing treatment errors caused by inaccurate human judgment.

[0021] In summary, the beneficial technical effects of this utility model are as follows: it achieves balanced circulation of recycled water in each pool, and dilutes the recycled water containing excessive flocculant in the circulation pool during the circulation process, which can realize the recycling of water resources without affecting the mud content in the manufactured sand. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the sand making and washing wastewater recycling and treatment device of this utility model.

[0023] In the diagram, 1. Vibrating screen; 2. Scrubbing and dewatering integrated machine; 21. Second metering pump; 3. Wastewater mixing tank; 31. Third metering pump; 4. Concentrator; 5. Filter press; 6. Circulation tank; 61. Circulation pump; 621. Hydrometer; 622. Liquid level sensor; 63. First metering pump; 7. Fine sand recovery tank; 8. Chemical storage tank; 9. Clear water tank; 10. Controller; 11. Drain valve; 12. Flow regulating valve; 13. Sewage valve. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figure 1 The present invention discloses a sand making and washing wastewater recycling and treatment device, which includes a vibrating screen 1, a scrubbing and dewatering integrated machine 2, a wastewater mixing tank 3, a thickening tank 4, a filter press 5, and a circulation tank 6 connected by a water supply pipeline, and also includes a fine sand recycling tank 7, a chemical storage tank 8, a clear water tank 9, and a controller 10.

[0026] A second metering pump 21 is installed on the water supply pipeline of the vibrating screen 1 and the integrated scrubbing and dewatering machine 2, and the controller 10 is electrically connected to the second metering pump 21. When the output of sand making and washing changes or the water quality changes, the controller 10 can flexibly adjust the flow rate of the second metering pump 21 according to preset parameters or real-time monitoring data. For example, when the sand production increases, in order to ensure the cleaning and dewatering effect of the integrated scrubbing and dewatering machine 2, the controller 10 can increase the flow rate of the second metering pump 21 and increase the amount of water delivered to the integrated scrubbing and dewatering machine 2. When the water quality is good and not much water is needed for cleaning, the controller 10 can reduce the flow rate of the second metering pump 21 to avoid wasting water resources. This water volume control not only helps to improve the efficiency and quality of sand making and washing, but also further optimizes the operating cost of the entire wastewater recycling and treatment device, making the whole system more intelligent and energy-saving. At the same time, the stable operation of the second metering pump 21 also ensures the continuity and stability of water supply, providing a strong guarantee for the smooth operation of sand making and washing production.

[0027] Drain valves 11 are installed on the water supply pipelines of the scrubbing and dewatering integrated machine 2, the wastewater mixing tank 3, the thickening tank 4, and the filter press 5, respectively. A controller 10 is electrically connected to the drain valves 11. During actual operation, when wastewater from the scrubbing and dewatering integrated machine 2 needs to be transported to the wastewater mixing tank 3, the controller 10 can open or close the corresponding drain valve 11 according to a preset program or real-time monitoring of wastewater volume and water quality, ensuring that wastewater enters the wastewater mixing tank 3 at an appropriate flow rate and time. For the drain valve 11 between the thickening tank 4 and the filter press 5, the controller 10 can reasonably adjust the opening and closing of the drain valve 11 based on factors such as the concentration level of the wastewater in the thickening tank 4 and the working status of the filter press 5, ensuring that the concentrated wastewater can be transported to the filter press 5 in a timely and effective manner. Further processing is carried out to improve the working efficiency and treatment effect of the filter press 5; the controller 10 can control the opening and closing of the drain valve 11 between the circulation tank 6 and the vibrating screen 1 according to the concentration of water in the circulation tank 6 and the working requirements of the vibrating screen 1, so that the water in the circulation tank 6 can be delivered to the vibrating screen 1 in a timely manner to meet the water requirements for sand washing; through the opening and closing control of these drain valves 11, the entire device can realize the orderly flow and treatment of sewage between various treatment stages, avoid the accumulation and disorderly discharge of sewage, and ensure the continuity and stability of the sand making and washing sewage recycling and treatment process.

[0028] The outlet of the chemical storage tank 8 is connected to the water supply pipeline between the sewage mixing tank 3 and the thickening tank. A third metering pump 31 is installed on the water supply pipeline between the sewage mixing tank 3, the thickening tank 4, and the chemical storage tank 8. The controller 10 is electrically connected to the third metering pump 31. When the composition and concentration of wastewater change, the controller 10 can adjust the flow rate of the third metering pump 31 based on preset parameters or real-time monitoring data. For example, when the impurity content in the wastewater is high, the controller 10 can increase the flow rate of the third metering pump 31, allowing more reagent to be transported from the reagent storage tank 8 to the thickening tank for thorough mixing with the wastewater, thereby improving the coagulation and sedimentation effect of impurities and enhancing the treatment efficiency of the thickening tank. Conversely, if the impurity content in the wastewater is low, the controller 10 can reduce the flow rate of the third metering pump 31 to avoid excessive use of reagents and reduce treatment costs. This precise control of reagent delivery helps ensure that the ratio of wastewater to reagent in the thickening tank is always at the optimal level, thereby improving the overall wastewater recycling and treatment device's treatment quality. At the same time, the third metering pump 31 can switch between the wastewater mixing tank 3 and the thickening tank 4, or between the wastewater mixing tank 3 and the reagent storage tank 8. Its stable operation ensures the continuity and stability of reagent delivery, providing a reliable guarantee for the effective treatment of wastewater in the thickening tank, enabling sand washing wastewater to be recycled and treated more efficiently and environmentally.

[0029] Flow regulating valves 12 are installed on the water supply pipelines of the circulating pool 6 and the vibrating screen 1, and the controller 10 is electrically connected to the flow regulating valves 12. During the sand making and washing process, the water supply requirements of the vibrating screen 1 are different at different stages. For example, in the initial stage of sand washing, a larger water flow is required to quickly wash away impurities such as mud on the surface of the sand and gravel. At this time, the controller 10 can increase the opening of the flow regulating valve 12 according to the preset program or the real-time monitoring of the working status of the vibrating screen 1, so that the water in the circulating pool 6 is delivered to the vibrating screen 1 at a larger flow rate, thereby improving the sand washing efficiency. In the later stage of sand washing, when the impurities on the surface of the sand and gravel are basically washed away, and only a smaller water flow is needed for further cleaning and rinsing, the controller 10 will correspondingly reduce the opening of the flow regulating valve 12 to avoid wasting water resources. At the same time, when the concentration of water in the circulating pool 6 changes, the controller 10 can also adjust the flow regulating valve 12 accordingly. If the water concentration in the circulation tank 6 is too high, in order to ensure the sand washing effect, the controller 10 will appropriately increase the opening of the flow regulating valve 12, increase the amount of fresh water replenishment, and reduce the concentration of water entering the vibrating screen 1; conversely, if the water concentration in the circulation tank 6 is low, the controller 10 will reduce the opening of the flow regulating valve 12 to maintain a suitable water supply.

[0030] Clear water tank 9 is connected to circulation tank 6 via a water supply pipeline. Circulation tank 6 is equipped with circulation pump 61 and concentration detection module. The concentration detection module consists of hydrometer 621 and liquid level sensor 622. First metering pump 63 is installed on the water supply pipeline between circulation tank 6 and filter press 5 and clear water tank 9, respectively. Controller 10 is electrically connected to circulation pump 61, concentration detection module and first metering pump 63. The hydrometer 621 measures the specific gravity of wastewater, thus reflecting the content of solid particles and other substances in the wastewater, providing crucial concentration data for subsequent treatment. The level sensor 622 monitors the wastewater level in real time, ensuring that the amount of wastewater in the device is within a suitable range. When the hydrometer 621 detects that the wastewater concentration is too high or too low, the controller 10 can adjust the treatment process in a timely manner according to a preset program, such as increasing or decreasing the dosage of chemicals, to ensure the wastewater treatment effect. Once the level sensor 622 detects that the level exceeds or falls below the set value, the controller 10 can immediately control the corresponding valve to perform drainage or water intake operations, preventing the device from malfunctioning due to abnormal level. The coordinated operation of these two sensors enables the entire sand making and washing wastewater recycling and treatment device to operate more accurately and stably, improving the quality and efficiency of wastewater recycling and treatment, while also reducing processing errors caused by inaccurate human judgment.

[0031] The inlet of the fine sand recovery tank 7 is connected to the sedimentation outlet of the sewage mixing tank 3, and the outlet is connected to the dewatering section of the scrubbing and dewatering machine 2. Furthermore, a drain valve 13 is installed between the fine sand recovery tank 7, the sewage mixing tank 3, and the scrubbing and dewatering machine 2, and the controller 10 is electrically connected to the drain valve 13. When the fine sand in the fine sand recovery tank 7 accumulates to a certain extent, or when it needs to be cleaned and maintained, the controller 10 can promptly open the drain valve 13 between the fine sand recovery tank 7 and the sewage mixing tank 3 or the scrubbing and dewatering integrated machine 2, discharging the material in the fine sand recovery tank 7 to the corresponding treatment area, ensuring the normal operation of the fine sand recovery tank 7. For the sewage mixing tank 3, if the sewage inside reaches a certain level or the mixing ratio does not meet the requirements for subsequent treatment, the controller 10 can control the drain valve 13 to discharge part of the sewage to a suitable treatment stage, achieving effective sewage allocation. After the scrubbing and dewatering integrated machine 2 completes its work, the controller 10 can also open the drain valve 13 to discharge the residual impurities or wastewater, preparing for the next operation. In this way, all aspects of the entire sand making and washing sewage recovery and treatment device can work more orderly and collaboratively, improving the automation level and overall operating efficiency of the device, while also reducing the workload and errors of manual operation, further improving the sewage recovery and treatment effect in the sand making and washing process.

[0032] The implementation principle of this embodiment is as follows: wastewater can flow and be treated in an orderly manner in the device according to a preset process. The clean water recovered from the circulating tank 6 first rinses the screen surface of the vibrating screen 1, and then is recovered and fed into the scrubbing and dewatering integrated machine 2 along with the screened manufactured sand through the water pipeline. The wastewater generated after the manufactured sand is dewatered flows into the wastewater mixing tank 3, where it is fully mixed with the flocculant transported from the chemical storage tank 8 to promote the sedimentation of impurities in the wastewater. The sedimented wastewater enters the concentration tank 4 for concentration, which further aggregates the impurities. The concentrated wastewater is then filtered by the filter press 5 to completely separate the impurities and water. At the same time, the fine sand recovery tank 7 can recover the fine sand discharged from the sedimentation outlet of the wastewater mixing tank 3 and transport it back to the dewatering section of the scrubbing and dewatering integrated machine 2, realizing the reuse of fine sand and improving the utilization rate of resources. In addition, the clean water... Water tank 9 is connected to circulation tank 6 via a water supply pipeline, which replenishes circulation tank 6 with clean water. The concentration detection module on circulation tank 6 can monitor the concentration of the recycled water in circulation tank 6 in real time. When the concentration of flocculant in the recycled water exceeds the standard, the controller 10 will control the first metering pump 63 according to the detection result to adjust the amount of clean water flowing from water tank 9 into circulation tank 6 and the amount of water flowing from filter press 5 into circulation tank 6, thereby diluting the recycled water in circulation tank 6 that contains excessive flocculant. Ultimately, the recycled water is evenly circulated among the tanks, ensuring the stability and efficiency of the entire treatment process. The overall design of this device not only realizes the recycling of water resources and reduces water waste, but also ensures the quality of the manufactured sand by effectively treating the recycled water without affecting the mud content in the manufactured sand, thus having significant economic and environmental benefits.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A wastewater recycling and treatment device for sand making and washing, characterized in that: The system includes a vibrating screen (1), a scrubbing and dewatering integrated machine (2), a sewage mixing tank (3), a thickening tank (4), a filter press (5), and a circulation tank (6), all connected via a water supply pipeline. It also includes a fine sand recovery tank (7), a chemical storage tank (8), a clear water tank (9), and a controller (10). The inlet of the fine sand recovery tank (7) is connected to the sedimentation outlet of the sewage mixing tank (3), and the outlet is connected to the dewatering section of the scrubbing and dewatering integrated machine (2). The outlet of the chemical storage tank (8) is connected to the sedimentation outlet of the sewage mixing tank (3). The feed inlet is connected to the water supply pipeline between the wastewater mixing tank (3) and the thickening tank. The clear water tank (9) is connected to the circulation tank (6) through the water supply pipeline. The circulation tank (6) is equipped with a circulation pump (61) and a concentration detection module. The circulation tank (6) is connected to the filter press (5) and the clear water tank (9) through the water supply pipelines respectively equipped with a first metering pump (63). The controller (10) is electrically connected to the circulation pump (61), the concentration detection module and the first metering pump (63).

2. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: A second metering pump (21) is installed on the water supply pipeline of the vibrating screen (1) and the scrubbing and dewatering integrated machine (2), and the controller (10) is electrically connected to the second metering pump (21).

3. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: A third metering pump (31) is installed on the water supply pipeline between the sewage mixing tank (3), the concentration tank (4), and the reagent storage tank (8), and the controller (10) is electrically connected to the third metering pump (31).

4. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: The scrubbing and dehydration machine (2), the sewage mixing tank (3), the concentration tank (4), and the filter press (5) are each equipped with a drain valve (11), and the controller (10) is electrically connected to the drain valve (11).

5. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: The circulation tank (6) and the vibrating screen (1) are respectively equipped with flow regulating valves (12) on their water supply pipes, and the controller (10) is electrically connected to the flow regulating valves (12).

6. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: A drain valve (13) is provided between the fine sand recovery tank (7), the sewage mixing tank (3), and the scrubbing and dewatering integrated machine (2), and the controller (10) is electrically connected to the drain valve (13).

7. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: The filter press (5) is a plate and frame filter press (5).

8. The sand making and washing wastewater recycling and treatment device according to claim 1, characterized in that: The concentration detection module consists of a hydrometer (621) and a liquid level sensor (622).

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