Sand-gravel material wastewater treatment and slurry secondary efficient dehydration system
By adding a vibration dewatering device and a multi-stage treatment system to the sand and gravel processing technology, the problems of fine sand recovery and mud dewatering have been solved, achieving efficient recovery of solid particulate matter and reuse of clean water, and reducing equipment load and operating costs.
Patent Information
- Application Number
- CN202520318795.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In traditional sand and gravel processing technology, it is difficult to achieve fine sand recovery and efficient slurry dewatering, resulting in problems such as loss of sand and gravel production, increased equipment load, filter cloth clogging and excessive moisture.
By adding a vibration dewatering device at the end of the mud thickening process, combined with a fine sand recovery device, a wastewater thickening system, a mud dewatering device, and a filter press, the efficient recovery of solid particulate matter and the reuse of clean water can be achieved through multi-stage recovery and dewatering.
It effectively recovers over 95% of solid particulate matter with a particle size greater than 0.075mm and over 90% of solid particulate matter with a particle size between 0.03 and 0.075mm, reducing the load on the filter press and equipment investment, minimizing the risk of clogging, and ensuring stable system operation and clean water recovery.
Smart Images
Figure CN223950814U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of sewage treatment, concretely to a sandstone material wastewater treatment and slurry secondary efficient dewatering system. BACKGROUND
[0002] In the traditional artificial sand wet processing technology, the recovery of fine sand and the efficient dewatering of slurry have been difficult problems to solve, and the conventional process generally sets a fine sand recovery device at the rear end of the sand washer, due to the fine sand particles being small, the specific surface area being large, and the combination with water being strong, the separation effect is poor, and a large amount of fine particles with a particle size less than 0.075mm will be lost with the water in the sand washing and fine sand recovery process, which not only leads to the loss of sand yield and affects the gradation of sand, but also produces a large amount of wastewater. When the wastewater enters the filter press, it will increase the load of the filter press and reduce its working efficiency; the impurities in the fine sand will block the filter cloth or pipeline of the filter press, affecting the filtering effect; and a large amount of water will also cause problems such as high moisture content of the filter cake and slow filter pressing speed. SUMMARY
[0003] In view of the above technical problems, the utility model aims to provide a sandstone material wastewater treatment and slurry secondary efficient dewatering system, which can effectively solve the recovery problem of fine solid particles with a particle size of 0.03-0.075mm in sandstone material wastewater by adding a vibration dewatering device at the rear end of the slurry concentration treatment process, compared with the conventional treatment process, only the vibration dewatering device is added, which can greatly reduce the load and filter pressing effect of the rear-end filter press, reduce the equipment investment and operating cost, and ensure the efficient and stable operation of the system.
[0004] In order to realize the above technical features, the purpose of the utility model is realized as follows: a sandstone material wastewater treatment and slurry secondary efficient dewatering system, comprising a fine sand recovery device, the sewage outlet end of the fine sand recovery device is connected with a sewage concentration system through a first sewage pump; a sludge collection device is arranged inside the sewage concentration system, the outlet of the sludge collection device is connected with a slurry buffer tank through a mud pumping device, the supernatant inside the sewage concentration system is connected with a water pool through an overflow pipe; a tee joint is installed at the bottom of the slurry buffer tank, one end of the tee joint is connected with a slurry dewatering device, and the other end is connected with a filter press; the sewage outlet end of the slurry dewatering device is connected with a mixer of the sewage concentration system; and the filtrate outlet of the filter press is connected with the water pool.
[0005] The wastewater of sandstone production is gravity flow or pressure pumping to the fine sand recovery device, the solid coarse particles with a particle size greater than 0.075mm are recovered by the fine sand recovery device for the first time, and the collected fine sand is stacked and stored.
[0006] The sewage concentration system is internally provided with a mud scraping device, when the sludge forms a sediment layer at the bottom of the pool, the mud scraping device judges the sludge concentration of the sediment layer by detecting the resistance of the scraping arm, and when the sludge concentration reaches the set concentration, the mud pumping is automatically started to pump the sludge into the slurry buffer tank.
[0007] The sewage concentration system is provided with an automatic dosing system.
[0008] An overflow tank is arranged at the upper portion of the sewage concentration system, the overflow tank is connected with the water pool through an overflow pipe, and the bottom of the water pool is connected with a clean water recycling pipe through a clean water pump.
[0009] The three-way joint is connected with the slurry dewatering device through a first slurry pump and a first slurry pipe.
[0010] The three-way joint is connected with the filter press through a second slurry pump and a second slurry pipe.
[0011] The slurry buffer tank is internally provided with a stirring system.
[0012] The slurry dewatering device is connected with the sewage concentration system through a second sewage pump.
[0013] The slurry dewatering device carries out secondary dewatering and drying of solid fine particle materials with a particle size greater than 0.03mm into waste materials.
[0014] The filter press is connected with the water pool through a clean water return pipe.
[0015] The sewage concentration system adopts a radial flow sedimentation tank or a vertical flow sedimentation tank.
[0016] The water pool adopts a concrete pool or a clean water tank.
[0017] The slurry dewatering device adopts a high-frequency vibrating screen.
[0018] The utility model has following beneficial effects:
[0019] 1. The system can effectively treat the wastewater generated in the sand and gravel production process, more than 95% of solid particles with a particle size greater than 0.075mm can be recovered through primary recovery, more than 90% of solid particles with a particle size of 0.03-0.075mm can be recovered through secondary dewatering, the operation load of the filter press and the equipment investment are reduced, the risk of filter pipe blockage is reduced, and the system can be operated efficiently and stably.
[0020] 2. The fine sand recovery device can recover solid coarse particles in the slurry, and the recovery rate is more than 95%.
[0021] 3. The sewage concentration system can realize efficient concentration of the slurry, so as to realize secondary separation of the slurry.
[0022] 4. The overflow tank can discharge the clean water generated in the concentration process into the water pool, so as to realize recycling of the clean water.
[0023] 5. The slurry dewatering device can realize secondary dewatering and drying of 90% of solid fine particle substances with a particle size greater than 0.03 mm into mud cakes, and the upper filtered water is returned to the sewage concentration system. BRIEF DESCRIPTION OF DRAWINGS
[0024] The utility model will be further described below in combination with the drawings and examples.
[0025] Figure 1 The system diagram of the utility model.
[0026] In the drawing: fine sand recovery device 1, first sewage pump 2, automatic dosing system 3, sewage concentration system 4, mud pump 5, mud scraping device 6, fine sand 7, overflow tank 8, overflow pipe 9, water pool 10, clean water pump 11, clean water recycling pipe 12, second sewage pump 13, slurry dewatering device 14, first slurry pipe 15, waste material 16, first slurry pump 17, slurry buffer tank 18, tee joint 19, second slurry pump 20, second slurry pipe 21, filter press 22, mud cake 23. DETAILED DESCRIPTION
[0027] The embodiment of the utility model will be further described below in combination with the drawings.
[0028] Example 1:
[0029] Referring to Figure 1The utility model provides a kind of sand and gravel waste water treatment and slurry secondary efficient dewatering system, including fine sand recovery device 1, the sewage outlet end of fine sand recovery device 1 is connected with sewage concentration system 4 by first sewage pump 2;Sewage concentration system 4 inside is provided with sludge collection device, sludge collection device outlet is connected with slurry buffer tank 18 by mud pump 5, the supernatant in the inside of sewage concentration system 4 is connected with water pool 10 by overflow pipe 9;Slurry buffer tank 18 bottom is equipped with tee joint 19, one end of tee joint 19 is connected with slurry dewatering device 14, and the other end is connected with filter press 22;The sewage outlet end of slurry dewatering device 14 is connected with the mixer of sewage concentration system 4;The filtrate outlet of filter press 22 is connected with water pool 10.By using the secondary efficient dewatering system described above, in the specific working process, the solid coarse particulate material in the slurry is recovered once by the fine sand recovery device 1, and when the sewage enters the sewage concentration system 4, it is concentrated again, and then enters the slurry dewatering device 14 from the slurry buffer tank 18 for secondary dewatering, thereby realizing the secondary recovery of the solid coarse particulate material in the slurry, effectively reducing the operating load of the filter press and the equipment investment, reducing the risk of filter pipe blockage, and ensuring the efficient and stable operation of the system.
[0030] Further, the wastewater of sand and gravel production is gravity flow or pressure pumping to the fine sand recovery device 1, and the solid coarse particulate material with a particle size greater than 0.075 mm is recovered once by the fine sand recovery device 1, and the collected fine sand 7 is stored. The fine sand recovery device 1 described above can recover the solid coarse particulate material in the slurry once, with a recovery rate of more than 95%.
[0031] Further, the sewage concentration system 4 is provided with a mud scraping device 6, which detects the resistance of the scraping arm when the sludge forms a sediment layer at the bottom of the pool, judges the sludge concentration of the sediment layer, and automatically starts the mud pumping pump to pump the sludge into the slurry buffer tank 18 when the sludge concentration reaches the set concentration. The sewage concentration system 4 described above can realize efficient concentration of slurry to facilitate subsequent further realization of secondary separation of slurry.
[0032] Further, the sewage concentration system 4 is provided with an automatic dosing system 3. The automatic dosing system 3 is located above the sewage concentration system, and when the sewage enters the sewage concentration system, the automatic dosing system 3 can simultaneously send the prepared medicament solution into the mixer of the sewage concentration system for full mixing.
[0033] Further, an overflow tank 8 is provided at the upper part of the sewage concentration system 4, the overflow tank 8 is connected with the water pool 10 through the overflow pipe 9, and the bottom of the water pool 10 is connected with a clear water recycling pipe 12 through a clear water pump 11. The overflow tank 8 described above facilitates the discharge of clear water generated in the concentration process to the inside of the water pool 10, thereby realizing the recycling of clear water.
[0034] Further, the tee joint 19 is connected to the sludge dewatering device 14 through the first sludge pump 17 and the first sludge pipe 15. The first sludge pump 17 can pump the sludge to the sludge dewatering device 14 for secondary dewatering. When the sludge storage volume in the sludge buffer tank 18 reaches a certain volume, the first sludge pump 17 is automatically opened to pump part of the sludge to the sludge dewatering device 14 for secondary dewatering.
[0035] Further, the tee joint 19 is connected to the filter press 22 through the second sludge pump 20 and the second sludge pipe 21. The second sludge pump 20 can pump the sludge to the filter press 22 for filter pressing dewatering. When the sludge storage volume in the sludge buffer tank 18 reaches a certain volume, the second sludge pump 20 is automatically opened to pump part of the sludge to the sludge dewatering device 14 for filter pressing dewatering. The formed sludge cake 23 will be transported by a transport vehicle.
[0036] Further, the sludge buffer tank 18 is provided with a stirring system. When the sludge enters the sludge buffer tank, stirring is used to prevent the sludge from depositing and solidifying on the tank bottom.
[0037] Further, the sludge dewatering device 14 is connected to the sewage concentration system 4 through the second sewage pump 13. The second sewage pump 13 can pump the sewage in the sludge dewatering device 14 to the sewage concentration system 4 for secondary concentration.
[0038] Further, the sludge dewatering device 14 performs secondary dewatering and drying of solid fine particle substances with a particle size greater than 0.03 mm into waste material 16. The sludge dewatering device 14 can perform secondary dewatering and drying of 90% of the solid fine particle substances with a particle size greater than 0.03 mm into a sludge cake, and the upper layer of filtered water is returned to the sewage concentration system.
[0039] Further, the filter press 22 is connected to the water pool 10 through the clear water return pipe 24.
[0040] Further, the sewage concentration system 4 adopts a radial flow sedimentation tank or a vertical flow sedimentation tank. The above-mentioned different structural forms enhance the adaptability of the sewage concentration system 4.
[0041] Further, the water pool 10 adopts a concrete pool or a clear water tank. The above-mentioned structure enhances the adaptability.
[0042] Further, the sludge dewatering device 14 adopts a high-frequency vibrating screen. The use of the above-mentioned high-frequency vibrating screen ensures the quality and effect of sludge separation, thereby realizing the secondary efficient recovery of solid particle substances in the sludge.
[0043] Example 2:
[0044] The specific process flow of the sandstone material wastewater treatment and slurry secondary efficient dewatering system is disclosed by the utility model:
[0045] Step 1, primary recovery, wastewater is discharged to fine sand recovery device 1 by gravity flow or pressure, fine sand above 0.075mm is recycled, wastewater flows into the mixer of sewage concentration system 4 through the pipeline, and the prepared medicament solution is sent into the mixer by automatic dosing system 3 to mix fully;
[0046] Step 2, slurry concentration, after sewage enters sewage concentration system 4, supernatant overflows to water pool 10 through overflow tank 8 to be reused, and sludge is collected by sludge collecting device and is pumped to slurry buffer tank 18 by mud pump 5 to be temporarily stored;
[0047] Step 3, secondary dewatering, part of slurry is pumped to slurry dewatering device 14 to be dewatered by controlling the three-way pipe valve at the bottom of slurry buffer tank 18, part of slurry can be pumped to filter press 22 to be mechanically dewatered, dewatered mud cake 23 is used as waste material, and the filtrate after dewatering of slurry dewatering device 14 is discharged to sewage concentration system 4 to be precipitated and filtered again, and the filtrate after dewatering of the filter press can directly flow into the water pool to be recycled;
[0048] Step 4, clear water reuse, the clear water in the water pool can be reused for sandstone material production water, and can be used for filter cloth cleaning of the filter press and other purposes, so that the discharge and pollution of water resources are reduced.
Claims
1. A sandstone material wastewater treatment and slurry secondary efficient dewatering system, characterized in that, The sandstone production wastewater is discharged to the fine sand recovery device (1) by gravity flow or pressure, and the solid coarse particle material with a particle size greater than 0.075 mm is recovered once by the fine sand recovery device (1), and the collected fine sand (7) is stored.
2. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The sewage concentration system (4) is provided with a mud scraping device (6), when the mud forms a sediment layer at the bottom of the pool, the mud scraping device (6) detects the resistance of the scraping arm to judge the concentration of the sediment layer, when the concentration of the mud reaches the set concentration, the mud pump is automatically started to discharge the mud to the slurry buffer tank (18).
3. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The sewage concentration system (4) is provided with an automatic dosing system (3); 4. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The sewage concentration system (4) is provided with an overflow tank (8), which is connected with the water pool (10) through the overflow pipe (9), and the bottom of the water pool (10) is connected with the water recycling pipe (12) through the water pump (11). The three-way joint (19) is connected with the slurry dewatering device (14) through the first slurry pump (17) and the first slurry pipe (15); 5. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The three-way joint (19) is connected with the filter press (22) through the second slurry pump (20) and the second slurry pipe (21). The slurry buffer tank (18) is provided with a stirring system.
6. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The slurry dewatering device (14) is connected with the sewage concentration system (4) through the second sewage pump (13); 7. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The slurry dewatering device (14) dewatering and drying the solid fine particle material with a particle size greater than 0.03 mm into waste material (16). The filter press (22) is connected with the water pool (10) through the water backflow pipe (24).
8. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The sewage concentration system (4) adopts a radial flow sedimentation tank or a vertical flow sedimentation tank; 9. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: The water pool (10) adopts a concrete pool or a clean water tank. The slurry dewatering device (14) adopts a high-frequency vibrating screen.
10. The sandstone material wastewater treatment and slurry secondary high-efficiency dewatering system according to claim 1, characterized in that: