Secondary efficient settling tank applied to sand washing process

Abstract

The utility model provides a secondary efficient settling tank applied to a sand washing process, which is characterized in that a primary settling tank and a secondary settling tank are arranged in parallel and share a partition partition plate in the middle, and a first overflow port is formed in the upper part of the partition partition plate; one end of the primary settling tank is provided with a primary feeding hole, and the bottom of the other end of the primary settling tank is provided with a primary slag slurry outlet, and one end of the secondary settling tank is provided with a secondary feeding hole; a flow guide device is arranged in the first-stage settling tank, and a first-stage slurry pump is mounted at the lower part of the first-stage settling tank and penetrates out of the first-stage slurry outlet; a reflux inlet is formed in the upper end part of the second-stage settling tank on the same side as the first-stage slurry pump, the reflux inlet is communicated with the second-stage material inlet, a second-stage slurry pump is arranged at the bottom of the second-stage settling tank, a second-stage slurry outlet is formed below the second-stage material inlet, and a second overflow port is formed in the other end, deviating from the second-stage material inlet, of the second-stage settling tank. The sedimentation tank replaces a traditional sedimentation tank matched with fine sand and muddy water recovery, and solves the problems that the sedimentation tank is large in occupied area, high in construction cost and low in sedimentation efficiency.

Description

Technical Field

[0001] The utility model relates to the field of machine-made sand environmental protection recovery equipment, in particular to a two-level high-efficiency sedimentation box applied to a water-washed sand process. Background Art

[0002] In the water-washed sand process, the muddy water after washing the sand is either directly dehydrated from the screening equipment or overflowed from the sand washing machine. From the perspective of environmental protection and economy, the discharged muddy water needs to be precipitated and filtered before recycling. At the same time, the muddy water contains a large amount of medium sand and fine sand, which are important components of construction sand, so it must be further recovered through other equipment. Before recycling, the sand in the muddy water needs to be precipitated and separated, and the sediment is pumped out by a slurry pump and sent to the next link for equipment processing. Traditional fine sand muddy water recovery is usually equipped with a sedimentation tank, but the sedimentation tank occupies a large area, has high construction costs, and low sedimentation efficiency. Therefore, we have developed a low-cost, miniaturized, and efficient sedimentation box. Utility Model Content

[0003] The utility model provides a two-stage high-efficiency sedimentation box applied to a water-washed sand process, aiming to replace a traditional sedimentation tank for recovering fine sand and muddy water, and solve the problems of a large sedimentation tank footprint, high construction cost and low sedimentation efficiency.

[0004] In order to achieve the above-mentioned object, the utility model provides a two-stage high-efficiency sedimentation box applied to a water-washed sand process, comprising a primary sedimentation box and a secondary sedimentation box, wherein the primary sedimentation box and the secondary sedimentation box are arranged in parallel, and a dividing partition plate is shared in the middle, and a first overflow port is arranged at the upper position of the dividing partition plate; a primary feed port is arranged at one end of the primary sedimentation box, and a primary slurry outlet is arranged at the bottom of the other end, and a secondary feed port is arranged at one end of the secondary sedimentation box on the same side as the primary slurry outlet;

[0005] A flow guide device is arranged in the first-level sedimentation tank, a first-level slurry pump is installed at the lower part of the flow guide device, and the first-level slurry pump passes through the first-level slurry outlet;

[0006] A reflux port is arranged at the upper end of the secondary sedimentation tank on the same side as the primary slurry pump, and the reflux port is connected to the secondary feed inlet. A secondary slurry pump is arranged at the bottom of the secondary sedimentation tank, a secondary slurry outlet is arranged below the secondary feed inlet, and a second overflow port is arranged at the other end of the secondary sedimentation tank away from the secondary feed inlet.

[0007] Preferably, a first front side plate inclined inwardly is provided at one end of the first-level feed inlet, and a first rear side plate inclined inwardly is provided at one end of the first-level slurry outlet.

[0008] Preferably, a second front side plate inclined inwardly is provided at one end of the secondary feed inlet, and a second rear side plate inclined inwardly is provided at the end where the second overflow outlet is located.

[0009] Preferably, a first partition is provided in the primary feed inlet, the first partition separates the primary feed inlet from the interior of the primary sedimentation tank, and a first feed notch is provided at the lower portion of the first partition.

[0010] Preferably, a second partition is provided in the secondary feed inlet, the second partition separates the secondary feed inlet from the interior of the secondary sedimentation tank, and a second feed notch is provided at the lower part of the second partition.

[0011] Preferably, a third partition is provided at one end of the second overflow port, an overflow space is provided between the third partition and the end plate, and a third overflow notch is provided at the lower portion of the third partition.

[0012] Preferably, sewage outlets are respectively arranged at the lower parts of both sides of the first sedimentation tank and the second sedimentation tank.

[0013] Preferably, the guide device is arranged to be inclined downward from the front end to the rear end of the primary sedimentation tank, and the guide device includes at least one layer of guide grate bars.

[0014] Preferably, the guide grate is a stacked string-shaped grate or a plurality of grate refraction plates that can be rotated to adjust the flip angle.

[0015] Compared with the related art, the two-stage high-efficiency sedimentation box applied to the water-washed sand process provided by the utility model has the following beneficial effects:

[0016] The utility model has a small volume and low cost. The feed liquid entering from the primary feed inlet can be settled and filtered by various multi-stage fine sand recovery means of the feed inclined sedimentation, the primary grate sedimentation, the overflow liquid secondary sedimentation, the reflux sedimentation, the overflow liquid inclined sedimentation and the final overflow in a relatively small processing space. The tailings filtering times can be optimized within a limited space and with a relatively small cost investment, thereby improving the filtering efficiency. At the same time, the application can be embedded in the continuous process link after the sand washing or wet screening of the existing sand selection production line with continuous liquid inflow, without changing other devices and processes in the link, and with less introduction cost, it can provide most of the medium and fine sand recovery, which has important value and significance from the perspectives of environmental protection and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-section state of the middle-level sedimentation box;

[0019] Figure 3 This is a sedimentation principle diagram of the first-level sedimentation box of this embodiment;

[0020] Figure 4 This is a diagram of the sedimentation principle of the secondary sedimentation tank of this embodiment;

[0021] Figure 5 is a schematic structural diagram of the flow guiding device of this embodiment;

[0022] Numbers in the figure:

[0023] 1. Primary sedimentation box, 2. Secondary sedimentation box, 3. Dividing partition plate, 4. First overflow port, 5. Primary feed port, 6. Primary slurry outlet, 7. Secondary feed port, 8. Guide device, 801. Stacked blades, 802. Grate refraction plate, 9. Primary slurry pump, 10. Reflux port, 11. Secondary slurry pump, 12. Secondary slurry outlet, 13. Second overflow port, 14. First front side plate, 15. First rear side plate, 16. Second front side plate, 17. Second rear side plate, 18. First partition plate, 19. First feed gap, 20. Second partition plate, 21. Second feed gap, 22. Third partition plate, 23. Third overflow gap, 24. Drain port, 25. Low-level sensor, 26. High-level sensor. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0025] like Figures 1 to 5 As shown, a two-stage high-efficiency sedimentation box used in a water-washed sand process comprises a primary sedimentation box 1 and a secondary sedimentation box 2. The primary sedimentation box 1 and the secondary sedimentation box 2 are arranged in parallel, and share a dividing partition plate 3 in the middle. A first overflow port 4 is arranged at the upper position of the dividing partition plate 3; a primary feed port 5 is arranged at one end of the primary sedimentation box 1, and a primary slurry outlet 6 is arranged at the bottom of the other end; a secondary feed port 7 is arranged at one end of the secondary sedimentation box 2 on the same side as the primary slurry outlet 6;

[0026] A flow guide device 8 is provided in the first-level sedimentation tank 1, and a first-level slurry pump 9 is installed at the lower part of the flow guide device 8, and the first-level slurry pump 9 passes through the first-level slurry outlet 6;

[0027] A reflux port 10 is provided at the upper end of the secondary sedimentation tank 2 on the same side as the primary slurry pump 9, and the reflux port 10 is connected to the secondary feed port 7. A secondary slurry pump 11 is provided at the bottom of the secondary sedimentation tank 2, and a secondary slurry outlet 12 is provided below the secondary feed port 7. A second overflow port 13 is provided at the other end of the secondary sedimentation tank 2 away from the secondary feed port 7.

[0028] In other specific embodiments, a first front side plate 14 tilted inwards is provided at one end of the primary feed inlet 5, and a first rear side plate 15 tilted inwards is provided at one end of the primary slurry outlet 6. A second front side plate 16 tilted inwards is provided at one end of the secondary feed inlet 7, and a second rear side plate 17 tilted inwards is provided at one end of the second overflow port 13. Both the primary sedimentation tank 1 and the secondary sedimentation tank 2 form a sedimentation cone, which is conducive to efficient sedimentation of the primary and secondary feeds.

[0029] In other specific embodiments, a first baffle 18 is provided in the primary feed inlet 5, the first baffle 18 separates the primary feed inlet 5 from the interior of the primary sedimentation tank 1, and a first feed inlet notch 19 is provided at the lower portion of the first baffle 18. A second baffle 20 is provided in the secondary feed inlet 7, the second baffle 20 separates the secondary feed inlet 7 from the interior of the secondary sedimentation tank 2, and a second feed inlet notch 21 is provided at the lower portion of the second baffle 20. The forward momentum of the feed of the primary sedimentation tank 1 and the feed of the secondary sedimentation tank 2 will be stopped under the refraction of the first baffle 18 and the second baffle 20, and a shorter steady flow zone is formed in the primary feed inlet 5 area and the second feed inlet 7 area, so that the sedimentation process can be quietly entered, thereby increasing the effective sedimentation area and sedimentation efficiency of the sedimentation tank of a specific specification.

[0030] In other specific embodiments, a third partition 22 is provided at one end of the second overflow port 13, an overflow space is provided between the third partition 22 and the end plate, and a third overflow notch 23 is provided at the lower part of the third partition 22. The muddy water after sedimentation in the second sedimentation tank 2 flows to the second overflow port 13, is intercepted and refracted at the third partition 22, and once again promotes the sedimentation of heavier mud and sand, and offsets the chaotic flow energy of the muddy water, and promotes the muddy water to enter the stable overflow space from the third overflow notch 23, and then after the last stable sedimentation, the lighter upper water flow flows out from the second overflow port 13, and the heavier mud and sand are collected at the bottom of the secondary sedimentation tank 2 after sedimentation again for slurry recovery. This embodiment once again changes turbulent flow into horizontal flow, optimizes the sedimentation and recovery of muddy water in a limited space, and further improves the sedimentation efficiency and effect.

[0031] In other specific embodiments, a sewage outlet 24 is respectively arranged at the lower part of both sides of the first-stage sedimentation tank 1 and the second-stage sedimentation tank 2, and a water level sensor is arranged in each sedimentation tank. The water level sensor is connected with the slurry pump signal, and the water level sensor is respectively provided with a low-level sensor 25 and a high-level sensor 26. When the water level in the sedimentation tank is lower than the low-level sensor 25, the slurry pump will be stopped in time to protect the slurry pump. When the water level is higher than the high-level sensor 26, the slurry pump is started to work. The water level sensor is arranged to be linked with the automatic start and stop of the slurry pump. On the one hand, it is beneficial to remove the precipitated silt in time, and on the other hand, it also prevents the water pump from being sucked empty, which is beneficial to prolonging the service life of the slurry pump.

[0032] In other specific embodiments, the guide device 8 is arranged to be tilted downward from the front end to the rear end of the primary sedimentation box 1, and the guide device 8 includes at least one layer of guide grate bars. The guide grate bars are stacked string-shaped grate bars 801 or multiple grate bar refraction plates 802 that can be rotated to adjust the flip angle. In this embodiment, the guide plate is in the form of two layers, one layer is a stacked string-shaped grate bar 801 in the form of a "string", which is mainly used when there is a lot of coarse sand, and the second layer is the second type of adjustable grate bar refraction plates 802, which is suitable for use when there is a lot of medium and fine sand. Specifically, Figure 5 As shown, the flow guide device 8 is divided into two layers. The flow guide grate of the first layer is a laminated string-shaped grate, that is, a laminated blade 801 in the downstream direction. According to the flow direction, most particles are difficult to pass through. Even if a small amount of fine particles pass through, they will collide with the adjustable blade-shaped grate refraction plate 802 of the second layer. The grate refraction plate 802 is in the opposite direction of the water flow, effectively refracting the particles. At the same time, the angle and gap of the grate refraction plate 802 are adjustable to optimize the sedimentation of muddy water with different concentrations and particles.

[0033] The use process of this embodiment is:

[0034] like Figure 3 and 4 As shown, first, the sand-water mixture enters the first-level sedimentation box of the water tank from the first-level feed inlet. Since the flow rate of the first-level feed inlet is very fast, turbulence is generated here, and the sand and water are highly mixed. In order to make the sand settle quickly, an adjustable first-level baffle is set at the first-level feed inlet so that the sand and water cannot rush forward immediately, but are forced to settle downward through the refraction of the first-level baffle. Here, the first-level baffle can be set as a fixed and adjustable part. When there is more coarse sand in the feed, the sedimentation speed is faster. In order to prevent the sand from accumulating at the bottom of the feed inlet due to excessive sedimentation, the adjustable first-level baffle can be lifted upward to allow the material to pass in time and slow down the sedimentation speed. At the same time, in the process of flowing forward, the sand is refracted by the diversion effect of the first front side plate set inwardly, so that the sand and water flow forward and settle at the same time. The sand and water at the bottom are drawn out through the first-level slurry outlet by the negative pressure traction of the first-level slurry pump, and the mud-water mixture can also flow into the second-level sedimentation box through the first overflow port of the upper layer.

[0035] The sand and water are separated by a cyclone or other washing device, and the remaining water and a small amount of fine sand flow into the secondary sedimentation tank from the secondary inlet through a pipeline. The principle is as follows Figure 4 As shown: a second baffle is set at the secondary inlet to force the sand to settle and be extracted from the secondary slurry outlet. At the same time, the sand settles freely in the secondary sedimentation box, and part of the settled water can also flow out from the second overflow port.

[0036] The utility model is suitable for the fine sand recovery link of the sand washing water after washing sand or the direct dehydration from the screening equipment or the overflow water from the sand washing machine in the water-washing sand process. The secondary high-efficiency sedimentation box of the utility model can be miniaturized and low-cost, and is used in the continuous process link of sand washing or wet screening with continuous liquid inflow, without changing other devices and processes in the link, with less introduction cost, it can provide most of the medium and fine sand recovery, which has important value and significance from the perspective of environmental protection and economy.

[0037] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A two-stage high-efficiency sedimentation box used in water-washed sand process, characterized in that: It comprises a primary sedimentation tank and a secondary sedimentation tank, wherein the primary sedimentation tank and the secondary sedimentation tank are arranged in parallel, and share a dividing partition plate in the middle, and a first overflow port is arranged at the upper position of the dividing partition plate; a primary feed port is arranged at one end of the primary sedimentation tank, and a primary slurry outlet is arranged at the bottom of the other end; and a secondary feed port is arranged at one end of the secondary sedimentation tank on the same side as the primary slurry outlet; A flow guide device is arranged in the first-level sedimentation tank, a first-level slurry pump is installed at the lower part of the flow guide device, and the first-level slurry pump passes through the first-level slurry outlet; A reflux port is arranged at the upper end of the secondary sedimentation tank on the same side as the primary slurry pump, and the reflux port is connected to the secondary feed inlet. A secondary slurry pump is arranged at the bottom of the secondary sedimentation tank, a secondary slurry outlet is arranged below the secondary feed inlet, and a second overflow port is arranged at the other end of the secondary sedimentation tank away from the secondary feed inlet.

2. The secondary high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A first front side plate inclined inwardly is disposed at one end of the primary material inlet, and a first rear side plate inclined inwardly is disposed at one end of the primary slurry outlet.

3. The secondary high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A second front side plate inclined inwardly is disposed at one end of the secondary material inlet, and a second rear side plate inclined inwardly is disposed at one end where the second overflow port is located.

4. The secondary high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A first partition is arranged in the primary feed inlet, and the first partition separates the primary feed inlet from the interior of the primary sedimentation tank. A first feed inlet notch is arranged at the lower part of the first partition.

5. The secondary high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A second partition is arranged in the secondary material inlet, and the second partition separates the secondary material inlet from the interior of the secondary sedimentation box, and a second material inlet notch is arranged at the lower part of the second partition.

6. The two-stage high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A third partition is arranged at one end of the second overflow port, an overflow space is arranged between the third partition and the end plate, and a third overflow notch is arranged at the lower part of the third partition.

7. The secondary high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: A sewage outlet is respectively arranged at the lower part of both sides of the first-stage sedimentation tank and the second-stage sedimentation tank.

8. The two-stage high-efficiency sedimentation box used in the water-washed sand process according to claim 1 is characterized in that: The flow guiding device is arranged to be inclined downward from the front end to the rear end of the primary sedimentation box, and the flow guiding device comprises at least one layer of flow guiding grate bars.

9. The two-stage high-efficiency sedimentation box used in the water-washed sand process according to claim 8 is characterized in that: The guide grate is a stacked string-shaped grate or a plurality of grate refraction plates that can be rotated to adjust the flip angle.

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