Sand water separator for sewage treatment

Abstract

The present application relates to the technical fields of separator, in particular to a sand-water separator for sewage treatment, which comprises a separation tank body, a water inlet pipe is arranged on the side wall of the separation tank body, a discharging auger is arranged at the bottom of the separation tank body, a collecting device for collecting sewage above is arranged in the separation tank body, a water squeezing device is arranged at the output end of the collecting device, a guiding device for collecting material is arranged below the collecting device, and the output end of the guiding device is communicated with the discharging auger, which greatly improves the use effect and makes the material removal more thorough.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of separator, in particular to a sand-water separator for sewage treatment. BACKGROUND

[0002] The sand-water separator is a necessary equipment in the sand trap of sewage treatment, which is used for separating the sand and water in the mixed liquid discharged from the sand trap. At present, the commonly used sand-water separator is the spiral sand-water separator, which has high separation efficiency. The sand particles deposited in the U-shaped groove at the bottom of the water tank are lifted to above the liquid surface by the spiral blades on the screw rod, and finally discharged from the discharge port at the top end of the feeding pipe extending out of the water tank. However, in the actual working process, the sand particles are usually lifted by the driving of the spiral blades, but in the process of lifting, the sand particles are also transported from the bottom water, resulting in that the treated sand particles contain a large amount of water, and part of the sewage is also brought out in the process of separation, resulting in poor separation effect. In addition, part of the sand particles will also be suspended in the upper layer of the water tank in the process of separation, and the flowing water will drive the sand particles to move, resulting in that the separation is not very thorough, which affects the production effect. SUMMARY

[0003] The present application aims to overcome the deficiency that there are still a lot of sand particles in the upper layer of the sewage in the process of sand-water separation, resulting in poor separation effect, and provides a sand-water separator for sewage treatment.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the present application specifically adopts the following technical scheme: a sand-water separator for sewage treatment, comprising a separation tank body, a water inlet pipe is arranged on the side wall of the separation tank body, a discharge auger is arranged at the bottom of the separation tank body, a collecting device for collecting the upper sewage is arranged in the separation tank body, a water squeezing device is arranged at the output end of the collecting device, a guide device for collecting materials is arranged below the collecting device, and the output end of the guide device is communicated with the discharge auger.

[0005] Further, the material collecting end of the discharge auger is arranged at the bottom of the separation tank body, the conveying section of the discharge auger is arranged upwardly inclined, and the material collecting end of the discharge auger is connected with the conveying section through a universal joint.

[0006] Further, the water inlet pipe is arranged at the upper part of the separation tank body, the bottom of the water inlet pipe extends into the inside of the separation tank body, a first partition plate is arranged in the inside of the separation tank body, the first partition plate is arranged at the side of the water inlet pipe, the upper part of the first partition plate is arranged inclinedly, and the outlet of the water inlet pipe is inclinedly arranged towards the first partition plate.

[0007] Further, the bottom of the first partition plate is inclined backward, the bottom of the first partition plate is provided with a second partition plate, the top of the second partition plate is higher than the bottom of the first partition plate, the second partition plate is an arc-shaped plate, the second partition plate is inclined toward the discharge auger, and the rear of the second partition plate is provided with a third partition plate along the direction of the discharge auger.

[0008] Further, the collecting device is a conveying belt, a plurality of collecting plates are arranged on the conveying surface of the conveying belt, the collecting plates are arranged along the width direction of the conveying belt, and a collecting net is arranged on the collecting plates along the length direction.

[0009] Further, the conveying belt is a chain conveying belt or a chain plate conveying belt, and the surface of the conveying belt is provided with holes for water leakage.

[0010] Further, the side edge of the conveying belt is provided with a mounting seat, the bottom of the collecting plate is hinged to the bottom of the mounting seat, the side surface of the mounting seat is provided with an arc-shaped guide groove, the side edge of the collecting plate is provided with a connecting column, the connecting column is slidingly arranged in the guide groove, the inside of the guide groove is provided with a sliding block, the bottom of the sliding block is provided with a spring, and the spring is arranged in the inside of the guide groove.

[0011] Further, the collecting net is made of flexible material, and the collecting net is detachably connected with the collecting plate.

[0012] Further, the squeezing device is a squeezing roller arranged above the conveying belt, the squeezing roller is arranged along the length direction of the collecting plate, and the two ends of the squeezing roller are provided with adjusting rods for adjusting the distance between the squeezing roller and the conveying belt.

[0013] Further, the guide device is a collecting bin, and the bottom of the collecting bin is communicated with the shell of the discharge auger.

[0014] The beneficial effects of the embodiment of the present application are that the water content is reduced compared with the traditional single spiral lifting dehydration, the three-stage baffle system effectively eliminates the turbulence inside the separation tank body, converts the disordered flow of the traditional equipment into a laminar state, improves the sedimentation speed of the sand and gravel, and reduces the secondary entrainment of fine particles, when the collecting plate rotates towards the conveying belt, the spring is compressed, the sliding block rotates towards the conveying belt, the collecting plate is perpendicular to the conveying belt in the free state, the sliding block stably places the roller at the end of the guide groove under the pushing of the spring, so that the collecting plate maintains a larger base surface when the conveying belt rotates, the sand and gravel floating in the sewage will be filtered by the collecting plate and the collecting net under the driving of the conveying belt, the sand and gravel in the sewage is collected multiple times, the collecting effect is improved, the gap between the roller surface and the conveying belt is adjusted by rotating the adjusting rod, the collecting plate is released by the extrusion roller when the conveying belt turns, the collecting plate is suddenly reset under the action of the spring, at the same time, the conveying belt turns, so that the collecting plate throws the sand and gravel in the collecting net into the collecting bin, so that the sand and gravel in the collecting net can be more completely discharged, the sand and gravel residue in the collecting net is reduced, the use effect is greatly improved, and the discharging is more complete. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 It is an enlarged structure schematic diagram of A in the present application; Figure 1

[0017] Figure 3 It is a schematic diagram of the front view structure of the present application;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the present application;

[0019] Figure 5 It is a schematic diagram of the structure of the mounting seat of the present application;

[0020] Figure 6 It is a schematic diagram of the internal top view structure of the separation machine body of the present application;

[0021] Figure 7 It is a schematic diagram of the flow blocking groove structure of the present application;

[0022] Figure 8 It is a schematic diagram of the collecting plate structure of the present application;

[0023] Figure 9 It is a schematic diagram of the side view structure of the present application;

[0024] Figure 10 It is a schematic diagram of the structure at the universal joint of the present application;

[0025] ​In the figure: 1, separation tank body; 101, first partition; 102, second partition; 103, third partition; 104, water inlet pipe; 105, flow blocking groove; 2, discharging auger; 201, material collecting end; 202, conveying section; 203, sleeve; 204, universal joint; 3, conveying belt; 301, mounting seat; 302, collecting plate; 303, collecting net; 304, guide groove; 305, sliding block; 306, spring; 307, roller; 4, water outlet pipe; 5, adjusting rod; 502, extrusion roller. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application are described below with reference to the accompanying drawings, and those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0027] Reference Figures 1 to 10The embodiment of the present application discloses a sand-water separator for sewage treatment, which mainly comprises a separation box body 1, the separation box body 1 is mainly a rectangular separation box, the internal volume is increased by about 20% than that of a traditional device, the sedimentation efficiency is improved by prolonging the water flow path, a water inlet pipe 104 is arranged on the upper portion of the side wall of the separation box body 1, the water inlet pipe 104 is lifted, a water inlet tank is arranged on the left side of the separation box body 1, the impact force of water flow when entering is increased when water is inletted, the bottom of the water inlet pipe 104 extends to about one-third height in the separation box body 1, a first baffle 101 is arranged below the water inlet pipe 104, the lower portion of the first baffle 101 is arranged obliquely to the left, the bottom of the first baffle 101 is arranged obliquely to the right, an included angle for reducing the flow velocity is formed between the bent portion of the first baffle 101 and the side wall of the separation box body 1, an included angle is left between the top of the first baffle 101 and the right side of the separation box body 1, so that when the flow velocity is slow due to the fact that the sand and gravel at the bottom is not timely transported, the sewage containing less sand and gravel overflowed from the top can enter the right side of the first baffle 101 from the gap, the risk of blockage is prevented, the sewage preliminarily entering the inside of the separation box body 1 is slowed down through the first baffle 101, the water inlet is guided to the front side of the separation box body 1, the water flow is slowed down to promote the rapid sedimentation of large-particle sand and gravel, direct impact on the bottom sediment sand layer is avoided, the resuspension phenomenon of the already settled sand and gravel is reduced, the sand and gravel with large quality will slide downward along the first baffle 101 and then gather to the bottom of the separation box body 1, the bottom of the separation box body 1 is arranged as an inverted trapezoid, the sand and gravel is gathered to the inside of the discharge auger 2, the right oblique design of the bottom of the first baffle 101 guides the water flow to the rear of the separation box body 1, an arc-shaped second baffle 102 is arranged on the water flow path, the top of the second baffle 102 is 5cm higher than the bottom of the first baffle 101 and is inclined by 15°, part of the water flow is smoothly guided to the direction of the discharge auger 2, the sand and gravel with large quality will flow at the bottom of the sewage when flowing, the bottom sand and gravel will flow downward through the guidance of the second baffle 102, the discharge auger 2 drives the sand and gravel pile to move, a secondary sedimentation zone is formed, the collection effect of the sand and gravel is increased, the water flow vortex is eliminated, and the stable flow state of the sand and gravel is ensured.

[0028] The discharge auger 2 is arranged at the bottom of the separation box body 1 as a material collecting end 201, the sand and gravel settled at the bottom moves to the right through the material collecting end 201, the material collecting end 201 is arranged along the bottom of the separation box body 1, is connected with a conveying section 202 of the obliquely arranged discharge auger 2 through a universal joint 204 at the right end, a sleeve pipe 203 is arranged at the end of the material collecting end 201, the sleeve pipe 203 is fixed at the bottom, the state of the material collecting end 201 is ensured to be stable, the sand and gravel moves to the right in the rotating condition and is then received by the conveying section 202, the bottom of the conveying section 202 is arc-shaped, so that the sand and gravel continues to move upward along the auger, the collection effect is improved, the loss of the sand and gravel is reduced, and a certain gap is left between the upper portion of the shell of the discharge auger 2 and the auger, so that the water backflow at the collecting bin is facilitated, and the collection effect is ensured.

[0029] The gap between the first baffle 101 and the second baffle 102 allows the upper layer of clear water to be released, thus reducing pressure and decreasing the impact of the water flow on the sand and gravel accumulated at the bottom. A third baffle 103 is installed behind the second baffle 102, with its bottom slightly higher than the tail of the second baffle 102. This creates a velocity difference between the upper and lower parts of the second baffle 102, collecting some of the sand and gravel accumulated on it and improving efficiency. The upper part of the third baffle 103 is angled upwards, releasing water pressure and allowing the water and sediment to flow upwards towards the outlet pipe 4. During this process, the water flow slows down, accumulating most of the sand and gravel on the side wall of the separator body 1 and the output end of the angled discharge auger 2. The outlet pipe 4 is located at... A baffle trough 105 is provided on the side wall of the separation tank body 1 and outside the outlet pipe 4. Sewage flowing from the bottom upwards overflows into the baffle trough 105 and then flows out through the outlet pipe 4. Due to its heavier mass, most of the sand and gravel will move to the right during the upward process and then gather on the inclined discharge auger 2, improving the collection effect. The water inlet is located at the lowest point in front of the baffle trough 105. The lower part of the conveyor belt 3 located above the baffle trough 105 moves obliquely downwards. The conveyor belt 3 passes through the water inlet and the sewage is separated again by the collection plate 302 on the conveyor belt 3 at the water inlet of the baffle trough 105. The sewage entering the baffle trough 105 is separated again, which greatly improves the separation effect and ensures the effective function of the sand-water separator.

[0030] The collection device adopts a chain plate or chain conveyor belt 3 structure, with multiple collection plates 302 installed at equal intervals on its conveying surface. Each collection plate 302 has a detachable flexible collection net 303 embedded along its length. The mesh size is optimized according to the target sand and gravel particle size, which can intercept suspended particles while allowing water to flow through. The collection net 303 is made of nylon or wire mesh, and the bottom of the collection net 303 has a structure that is shorter on the left and longer on the right. The collection net 303 also has a certain depth to increase the sand and gravel collection effect, while also preventing the collection net 303 from going over the collection plate 302 from the bottom, thus increasing the reliability during use.

[0031] The mounting seat 301 is arranged on both sides of the conveying belt 3, the collecting plate 302 is arranged between the two mounting seats 301, the two ends of the collecting plate 302 are hinged to the bottom of the mounting seat 301 through a rotating shaft, so that the mounting seat 301 can rotate on the surface of the conveying belt 3, the arc-shaped guide groove 304 is arranged on the side of the mounting seat 301, the upper part of the collecting plate 302 is provided with a connecting column, the end of the connecting column is rotatably provided with a roller 307, the sliding block 305 is arranged in the guide groove 304, the bottom of the sliding block 305 is provided with a spring 306, the spring 306 is arranged in the guide groove 304, the sliding block 305 slides along the direction of the guide groove 304, when the collecting plate 302 rotates towards the conveying belt 3, the spring 306 is compressed, the sliding block 305 rotates towards the conveying belt 3, in the free state, the collecting plate 302 is perpendicular to the conveying belt 3, the roller 307 is stably arranged at the end of the guide groove 304 under the pushing of the spring 306, so that when the conveying belt 3 rotates, the collecting plate 302 keeps a larger base surface, the collecting effect is improved, the conveying belt 3 is arranged on the right side of the first partition plate 101 and above the second partition plate 102 and the third partition plate 103, after the sewage enters the space, the flow rate is slowed down, the sand and gravel floating in the sewage is collected by the collecting plate 302 and the collecting net 303 under the driving of the conveying belt 3, the sand and gravel in the sewage is collected for many times, the collecting effect is greatly improved, the sand and gravel that cannot be gathered to the bottom is collected by the discharging auger 2, the collecting effect is improved, compared with the device using only the auger to separate sand and water, the collecting effect is greatly improved.

[0032] The surface of the conveying belt 3 is densely distributed with water leakage holes, which cooperate with the water passing characteristics of the collection net 303 to achieve preliminary dehydration while collecting sand and gravel. If the collection net 303 contains too much sand and gravel, there will be more water in the collection net 303, and the separation effect will be poor if the water is collected directly. Therefore, water squeezing devices are arranged in the conveying direction of the conveying belt 3 to squeeze the water in the collection net 303. The number of water squeezing devices is selected according to the use condition. If the water content is high, more groups of water squeezing devices are used. Different squeezing effects are formed according to different distances between the squeezing rollers 502 and the conveying belt 3. If the content is low, one group is arranged near the discharge end. Two groups of squeezing rollers 502 are arranged in parallel above the conveying belt 3. Threaded adjusting rods 5 are arranged at both ends of each squeezing roller 502. By rotating the adjusting rod 5, the angle of the squeezing roller 502 is adjusted to control the gap between the roller surface and the conveying belt 3. The length of the squeezing roller 502 is slightly smaller than the length of the collection plate 302. When the collection plate 302 containing sand and water passes, the squeezing roller 502 will block the collection plate 302. Because the mounting seat 301 is provided with a guide groove 304, the collection plate 302 will rotate backward, and the collection net 303 will be compressed. The principle is that the squeezing roller 502 compresses the collection plate 302 and the collection net 303 towards the conveying belt 3, reduces the space of the collection net 303, and makes the free water in the sand layer further separate out. The distance between the squeezing roller 502 and the conveying belt 3 is adjusted to avoid excessive squeezing and loss of fine particles. The squeezing roller 502 is arranged at the top of the conveying belt 3. When the conveying belt 3 changes direction, the squeezing roller 502 releases the collection plate 302. Under the action of the spring 306, the collection plate 302 is suddenly reset. At the same time, the conveying belt 3 changes direction, so that the collection plate 302 throws the sand and gravel in the collection net 303 into the collection bin, so that the sand and gravel in the collection net 303 can be more completely separated out, reducing the residue of sand and gravel in the collection net 303, greatly improving the use effect, and making the material separation more complete.

[0033] A baffle is arranged at the upper part of the collection bin to reduce the splashing of sand and gravel. The lower part is designed in a funnel shape, the bottom is directly communicated with the shell of the discharge auger 2, and the inner wall of the bin body is provided with spiral guide vanes to guide the sand and gravel to form a directional flow state and reduce the risk of blockage. The sand and gravel in the collection bin are guided into the discharge auger 2. Since the conveying section 202 cannot be completely filled with sand and gravel, the sand and gravel falling from the inside of the collection bin can fill the gap between the auger blades as much as possible, and then squeeze out the water between the augers. Since the discharge auger 2 is arranged obliquely, the squeezed-out water will move to the left, so that the water content at the discharge port at the rear of the discharge auger 2 can be further reduced,

[0034] The traditional spiral separator relies on fixed lead blade to push sand, and is easy to cause sand gravel to be missed due to liquid level fluctuation. The suspended sand gravel trapping efficiency is increased by more than 40%, the moisture content is reduced compared with the traditional single spiral lifting dehydration, the three-stage baffle system effectively eliminates the internal turbulence of the separation tank body 1, converts the disordered flow of the traditional equipment into a laminar state, improves the sand gravel settling velocity, reduces the secondary entrainment of fine particles, the collecting net 303 adopts a buckle type quick release structure, the squeezing roller 502 is provided with a locking nut together with the adjusting rod 5, and the key components can be replaced within 30 minutes, the operation and maintenance efficiency is significantly improved, and the device is suitable for high suspended matter concentration sewage treatment scenes.

[0035] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to the process, article or equipment / device.

[0038] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without deviating from the principles of the present application, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical scheme after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A sand-water separator for wastewater treatment, comprising a separation tank body, wherein a water inlet pipe is provided on the side wall of the separation tank body, characterized in that: The bottom of the separation tank is equipped with a discharge auger. Inside the separation tank is a collection device for collecting wastewater from above. The output end of the collection device is equipped with a water-squeezing device. Below the collection device is a guide device for collecting the wastewater. The output end of the guide device is connected to the discharge auger. The water inlet pipe is located at the top of the separator body, and its bottom extends into the interior of the separator body. A first partition is located inside the separator body, positioned beside the water inlet pipe. The first partition extends vertically within the separator body, with its upper portion inclined forward and downward. The outlet of the water inlet pipe is inclined towards the first partition. The bottom of the first partition is inclined backward and downward. A second partition is arranged at the bottom of the first partition along the direction of the discharge auger. The top of the second partition is closer to the first partition, and the top of the second partition is higher than the bottom of the first partition. The second partition is an arc-shaped plate with its opening facing away from the discharge auger. The second partition is inclined backward and towards the discharge auger. A third partition is arranged behind the second partition along the direction of the discharge auger. The bottom of the third partition is slightly higher than the tail of the second partition, and the third partition is inclined upward and backward. The collecting device is a conveyor belt, which is located behind the first partition. Multiple collecting plates are arranged on the conveyor surface of the conveyor belt, extending along the width of the conveyor belt. Collecting nets are arranged on the collecting plates along their length. The collecting end of the discharge auger is located at the bottom of the separation box body, and the collecting end of the discharge auger is located at the bottom of each partition. Mounting seats are provided on both sides of the conveyor belt. The bottom of the collecting plate is hinged to the bottom of the mounting seat. An arc-shaped guide groove is provided on the side of the mounting seat. A connecting column is provided on the side of the collecting plate. The connecting column is slidably disposed in the guide groove. A sliding block is provided inside the guide groove. A spring is provided at the bottom of the sliding block. The spring is disposed inside the guide groove.

2. The sand-water separator for wastewater treatment according to claim 1, characterized in that: The conveying section of the discharge auger is inclined upward, and the collecting end of the discharge auger is connected to the conveying section via a universal joint.

3. The sand-water separator for wastewater treatment according to claim 1, characterized in that: The conveyor belt is a chain conveyor belt or a chain plate conveyor belt, and the surface of the conveyor belt is provided with holes for water leakage.

4. The sand-water separator for wastewater treatment according to claim 1, characterized in that: The collection net is made of flexible material and is detachably connected to the collection plate.

5. The sand-water separator for wastewater treatment according to claim 4, characterized in that: The dewatering device is a squeezing roller installed above the conveyor belt. The squeezing roller is arranged along the length of the collecting plate, and both ends of the squeezing roller are provided with adjusting rods for adjusting the distance between the squeezing roller and the conveyor belt.

6. The sand-water separator for wastewater treatment according to claim 1, characterized in that: The guiding device is a collection bin, and the bottom of the collection bin is connected to the outer shell of the discharge auger.

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