Horizontal flow type fine desanding device

Abstract

The utility model provides a horizontal flow type fine desanding device which comprises a tank body, a water inlet and a water outlet are respectively arranged at the front end and the rear end of the tank body, a settling zone is arranged at the lower part of the tank body, a sand collecting hopper is arranged at the bottom of the middle position of the settling zone, and an effluent weir is arranged at the position, close to the water outlet, of the tank body; a spiral blade shaft is arranged at the lower part of the settling zone along the water inlet and outlet direction, and is used for conveying sediments into the sand collecting hopper; blades on the spiral blade shaft are symmetrically arranged on the two sides with the sand collecting hopper as the center. The horizontal flow type desanding device solves the problem that an existing horizontal flow type desanding device is not high in efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a horizontal flow fine sand removal device. Background Technology

[0002] Due to the rapid development of the environmental protection industry, the precision requirements for sand removal processes are becoming increasingly stringent. Traditional sand removal technologies are gradually failing to meet market demands, leading to the emergence of high-precision sand removal devices. The mainstream high-precision sand removal methods are multi-layer vortex flow and high-efficiency horizontal flow. Currently, in domestically available high-efficiency horizontal flow fine sand removal devices, the bottom sand discharge spiral collection hopper is located at the outlet end, while most sand settles at the inlet end and is transported from the inlet to the outlet. This process is not only inefficient but also easily affects the quality of the effluent. Therefore, there is a need to invent a new type of horizontal flow fine sand removal device. Utility Model Content

[0003] The purpose of this invention is to provide a novel horizontal flow fine sand removal device to solve the aforementioned problems existing in current fine sand removal devices.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A horizontal flow fine sand removal device includes a pool body with an inlet and an outlet at its front and rear ends, respectively. A sedimentation zone is located at the bottom of the pool body, and a sand collection hopper is located at the bottom of the middle position of the sedimentation zone. An outlet weir is located near the outlet of the pool body. A spiral blade shaft is arranged at the bottom of the sedimentation zone along the inlet and outlet directions. The spiral blade shaft is used to transport the sediment to the sand collection hopper. The blades on the spiral blade shaft are symmetrically arranged on both sides of the sand collection hopper.

[0006] Preferably, in conjunction with the above scheme, the pool body is provided with a number of inclined plate groups arranged parallel to each other along the water inlet and outlet directions. The inclined plate group includes a number of pairs of inclined plates arranged parallel to each other from top to bottom. Each pair of inclined plates is arranged in an inverted V-shape, and a sedimentation gap is provided between each pair of inclined plates.

[0007] Preferably, in conjunction with the above scheme, a water distribution and slag-blocking perforated plate is detachably connected to the pool body near the water inlet. The water distribution and slag-blocking perforated plate is provided with several sets of water distribution holes at intervals, and the height of the water distribution and slag-blocking perforated plate extends from the water surface to the bottom of the sedimentation zone.

[0008] Preferably, in conjunction with the above scheme, a spiral blade shaft groove is provided at the bottom of the sedimentation zone along the water inlet and outlet direction, and the spiral blade shaft is disposed in the spiral blade shaft groove.

[0009] Preferably, in conjunction with the above scheme, a drive platform is provided outside the pool body, and a drive motor is provided on the drive platform. The shaft of the drive motor is connected to one end of the spiral blade shaft through a sprocket structure.

[0010] Preferably, in conjunction with the above scheme, the sand removal device further includes a sand removal washing and separation system, which includes an air source blower. The air source blower is connected to a first air path, which is connected to aeration pipes on both sides below the sedimentation zone. The aeration pipes are correspondingly arranged below the sedimentation gap of the inclined plate group.

[0011] Preferably, in conjunction with the above scheme, the air source fan is connected to a second air passage, the second air passage is connected to a sand suction pipe, and the suction nozzle at the lower end of the sand suction pipe is set in the sand collection hopper.

[0012] Preferably, in conjunction with the above scheme, the upper end of the sand suction pipe is connected to the air-water separator, the air-water separator is connected to the high-speed shearing machine, and the high-speed shearing machine guides the sand to the sand-water separator through the sand discharge pipe.

[0013] Preferably, in conjunction with the above scheme, the sand removal device further includes a sand level measurement system, which includes a sand discharge pipe, an air source discharge pipe, an empty pipe, a mud level gauge mounting bucket, a riser pipe, a sewage discharge pipe, and a liquid level balance pipe. One end of the sand discharge pipe is connected to the lower part of the sand suction pipe, and the other end of the sand discharge pipe is connected to the empty pipe and the mud level gauge mounting bucket, respectively. The top of the mud level gauge mounting bucket is connected to the air-water separator through the riser pipe. One end of the air source discharge pipe is connected to the end of the sand lifting air path, and the other end of the air source discharge pipe is connected to the bottom of the riser pipe. The side wall of the riser pipe is connected to the sewage discharge pipe, and the sewage discharge pipe is connected to the sand discharge pipe.

[0014] Preferably, in conjunction with the above scheme, the sidewall of the riser pipe is connected to the liquid level balance pipe, and the liquid level balance pipe is located in the upper part of the sedimentation zone near the clear liquid area.

[0015] The beneficial effects of this utility model are as follows: The specially designed spiral blade shaft in this device can transport the sediment from both ends of the pool to the center. When the screw rotates at the same speed, the amount of sand transported is greatly increased, the path of the sand to the sand collection hopper is halved, and the running time of the spiral sand scraping system is halved. At the same time, the axial force of the spiral blade shaft is self-cancelled on the shaft body, and it will not generate axial force on the drive end and tail end bearings, which helps to reduce the wear of bearings and blades, reduce operating energy consumption, and extend the service life of the equipment.

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1This is a plan view of a horizontal flow fine sand removal device according to the present invention.

[0018] Figure 2 for Figure 1 AA view.

[0019] Figure 3 for Figure 2 BB view.

[0020] Figure 4 for Figure 3 The C-direction view.

[0021] Figure 5 This is a schematic diagram of the water flow direction in this utility model.

[0022] Figure 6 This is a structural diagram of the water distribution and slag-blocking orifice plate in this utility model.

[0023] Figure 7 This is a structural diagram of the inclined plate assembly in this utility model.

[0024] Figure 8 for Figure 4 Piping system layout diagram.

[0025] The components include: 1. Pool body; 101. Inlet; 102. Sedimentation zone; 103. Sand collection hopper; 104. Outlet weir; 105. Outlet; 106. Operating platform; 107. Ladder; 2. Water distribution and slag-blocking perforated plate; 201. Water distribution hole; 3. Inclined plate assembly; 301. Support; 302. Steel wire rope; 303. Spiral buckle; 304. Ear seat; 401. Spiral blade shaft; 402. Spiral blade shaft groove; 403. Guide rod; 404. Chain; 405. Drive motor; 406. 501. Drive platform; 502. Air source blower; 503. First air path; 504. Aeration pipe; 505. Second air path; 506. Sand suction pipe; 507. Suction nozzle; 508. Air-water separator; 509. High-speed shearing machine; 601. Sand discharge pipe; 602. Air source discharge pipe; 603. Drain pipe; 604. Mud level gauge mounting tank; 605. Riser pipe; 606. Sewage discharge pipe; 607. Liquid level balance pipe; 7. Sand-water separator; 8. Central control cabinet. Detailed Implementation

[0026] like Figures 1 to 4The device shown is a horizontal flow fine sand removal device, including a pool body 1. The pool body 1 has an inlet 101 and an outlet 105 at its front and rear ends, respectively. A sedimentation zone 102 is provided at the lower part of the pool body 1. A sand collection hopper 103 is provided at the bottom of the middle position of the sedimentation zone 102. An outlet weir 104 is provided at the position of the pool body 1 near the outlet 105. A spiral blade shaft 401 is provided at the lower part of the sedimentation zone 102 along the water inlet and outlet direction. The spiral blade shaft 401 is used to transport the sediment to the sand collection hopper 103. The blades on the spiral blade shaft 401 are symmetrically arranged on both sides with the sand collection hopper 103 as the center. Guide rods 403 are provided at both ends of the helical blade shaft 401, and the guide rods 403 are fixed inside the pool body 1. Sliding grooves are provided at both ends of the helical blade shaft 401, and the sliding grooves are slidably connected to the guide rods 403. Steel wire ropes are connected to both ends of the helical blade shaft 401, which can be used to lift the helical blade shaft 401 out of the pool body for maintenance, facilitating maintenance without interrupting water supply and reducing maintenance costs. In addition to the above structure, an operating platform 106 is provided around the pool body, a ladder 107 is provided for climbing onto the operating platform, and a centralized control cabinet 8 for controlling various devices is also provided.

[0027] like Figure 7 As shown, several inclined plate groups 3 are arranged parallel to each other along the inlet and outlet directions in the tank body 1. The inclined plate groups 3 can be arranged side by side. Each inclined plate group 3 includes several pairs of inclined plates arranged parallel from top to bottom. Each pair of inclined plates is arranged in an inverted V-shape, and a sedimentation gap is provided between each pair of inclined plates. The bottom of the inclined plate group 3 is supported by the support 301 fixed to the inner wall of the tank body 1, and the top is hung on the ear seat 304 fixed to the outer side of the tank body 1 by stainless steel wire rope 302 and spiral buckle 303. The inclined plate groups 3 are arranged compactly and evenly throughout the sedimentation zone 102, forming an inclined plate zone. The inclined plates improve the sedimentation effect and improve the quality of the effluent. Each inclined plate group 3 has an independent frame, and can be lifted out one group at a time for maintenance without interrupting the water supply, reducing maintenance and usage costs.

[0028] like Figure 6 As shown, a water distribution and slag-blocking orifice plate 2 is detachably connected to the inlet 101. The orifice plate 2 has several sets of water distribution holes 201 spaced apart, and its height extends from the water surface to the bottom of the sedimentation zone 102. The orifice plate 2 functions to evenly distribute water, block floating slag, accelerate sand settling, and improve treatment efficiency. Its detachable structure allows for automatic flushing via the aeration pipe 503 to prevent clogging, and it can also be periodically raised from the water surface for cleaning without interrupting water flow, preventing clogging from affecting operational performance.

[0029] The bottom of the sedimentation zone 102 is provided with a spiral blade shaft groove 402 with an arc structure along the water inlet and outlet direction, and the spiral blade shaft 401 is set in the spiral blade shaft groove 402. The spiral groove 402 is installed at the bottom of the sedimentation zone 102, and the bottom of the middle position of the spiral groove 402 is connected to the sand collection hopper 103.

[0030] A drive platform 406 is installed outside the pool body 1, and a drive motor 405 is installed on the drive platform 406. The shaft of the drive motor 405 is connected to one end of the spiral blade shaft 401 through a sprocket and chain mechanism. A set of sprockets can be installed on the shaft of the drive motor 405 and one end of the spiral blade shaft 401, and the two sets of sprockets can be connected by a chain 404.

[0031] like Figure 8 As shown, the sand removal device also includes a sand removal and washing separation system. This system includes an air source blower 501, connected to a first air passage 502. The first air passage 502 connects to aeration pipes 503 on both sides below the sedimentation zone 102. The aeration pipes 503 have several sets of aeration holes evenly spaced downwards. The aeration pipes 503 are positioned below the sedimentation gaps of the inclined plate group 3, used for aeration and washing of the sediment on the inclined plate group 3. An air volume regulating valve is installed on the air passage of the aeration pipes 503.

[0032] The air source blower 501 is also connected to a second air passage 504, which is connected to a sand suction pipe 505. The suction nozzle 506 at the lower end of the sand suction pipe 505 is located in the sand collection hopper 103. The air source blower 501 can use air pressure to extract the sediment from the sand collection hopper 103.

[0033] The upper end of the sand suction pipe 505 is connected to the air-water separator 507, the air-water separator 507 is connected to the high-speed shear machine 508, and the high-speed shear machine 508 guides the water to the sand-water separator 7 through the sand discharge pipe 509.

[0034] The sand removal device also includes a mud and sand level measurement system, which includes a sediment discharge pipe 601, an air source discharge pipe 602, an empty pipe 603, a mud level gauge mounting tank 604, an ascending pipe 605, a sewage discharge pipe 606, and a liquid level balancing pipe 607. One end of the sediment discharge pipe 601 is connected to the lower part of the sand suction pipe 505, and the other end of the sediment discharge pipe 601 is split into two paths and connected to the empty pipe 603 and the mud level gauge mounting tank 604 respectively through two control valves. The top of the mud level gauge mounting tank 604 is connected to the air-water separator 507 through the ascending pipe 605. One end of the air source discharge pipe 602 is connected to the end of the second air path 504 (sand lifting air path), and the other end of the air source discharge pipe 602 is connected to the bottom of the ascending pipe 605. The side wall of the ascending pipe 605 is connected to the sewage discharge pipe 606, and the sewage discharge pipe 606 is connected to the sand discharge pipe 509. The riser pipe 605 and the air source outlet pipe 602 are equipped with regulating valves, the sewage pipe 606 is equipped with a solenoid valve, and the mud and sand level gauge installation bucket 604 is equipped with a float level gauge and a mud level observation window.

[0035] The riser pipe 605 is connected to the liquid level balance pipe 607 on its side wall. The liquid level balance pipe 607 is located in the upper part of the sedimentation zone 102, near the clear liquid area. The liquid level balance pipe 607 is equipped with a control valve. The liquid level balance pipe 607 connects the upper part of the sedimentation zone 102 and the mud level gauge mounting tank 604, so that the pressure on both sides is balanced, and the mud level measurement is more accurate.

[0036] Compared with existing sand removal devices on the market, this utility model has the following advantages:

[0037] 1. The spiral blade shaft is manufactured with symmetrical left and right spiral blades on both sides of the sand collection hopper as the center, or it can be set to be symmetrical left and right with the middle of the spiral blade shaft as the center. Driven by the blades, the sediment at the bottom of the pool is transported from both ends to the middle and falls into the sand collection hopper. Under the premise that the shaft rotation remains unchanged, the sand conveying capacity is increased by 100% compared with the traditional structure, the path of sediment falling into the sand hopper is halved, and the spiral scraping sand running time is halved. At the same time, the axial force of the spiral blade shaft scraping sand is self-cancelled on the shaft, which will not generate axial force on the drive end and tail end bearings, which helps to reduce bearing and blade wear, reduce operating energy consumption, and extend the service life of the equipment.

[0038] 2. Replace the existing sand lifting system with an air-lift sand lifting system. Replace the sand suction pump with a low-power, low-noise, low-pressure air source fan, which can be an air compressor or blower. Energy consumption is reduced by half, there are no easily damaged parts, the equipment service life is extended, and operating and maintenance costs are reduced. Air-lift sand lifting also has low energy consumption and convenient flow rate adjustment.

[0039] 3. The spiral blade shaft uses a drive motor and chain drive at the top of the tank (without penetrating the wall), eliminating the need for a through-wall rotating dynamic seal and completely avoiding leakage problems caused by seal wear. Furthermore, the entire system can be hoisted in and out without interrupting water flow, allowing for maintenance of the sedimentation tank without interrupting water flow or cleaning. In contrast, the traditional spiral blade shaft passes through the tank body from the inside and is installed on the outer wall, making installation and removal difficult. It also has a through-wall rotating dynamic seal, which is prone to leakage after seal wear, leading to inconvenient maintenance.

[0040] 4. Adding a high-speed shearing machine to the sand discharge pipeline can separate the tiny sand particles coated with organic film in the sand-water after gas release, allowing nutrients to return to the treatment system. This improves the separation efficiency of the sand-water separator.

[0041] 5. The perforated aeration pipe installed under the inclined plate assembly can periodically circulate air and water to flush the inclined plates, preventing blockage and greatly reducing the frequency of manual flushing when the inclined plates are lifted out, thus lowering operation and maintenance costs.

[0042] 6. The real-time mud and sand level measurement system ensures energy-efficient operation of the equipment. Using this utility model system, the removal rate of sand particles from 50um to 200um can be greater than 90%.

[0043] The main principle of this utility model:

[0044] Wastewater to be treated enters the tank 1 through inlet 101. Under the action of the water distribution and slag-blocking orifice plate 2, most of the scum and silt are intercepted at the front of the tank 1. The intercepted silt settles rapidly at this location. Wastewater passing through the water distribution and slag-blocking orifice plate 2 enters the sedimentation zone 102. Under the action of hydraulic force, the lighter water floats to the surface, while the heavier silt sinks. This process is accelerated by the inclined plate group 3, resulting in a lower suspended solids content in the water passing through the inclined plate group 3. Finally, under the action of the outlet weir 104, the wastewater flows out of the tank 1 through outlet 105, completing the treatment. At the same time, under the action of the flushing aeration pipe 503, the silt attached to the gravel in the sedimentation zone 102 is gradually stripped off. Due to its higher density, the stripped gravel quickly sinks to the bottom of the sedimentation zone and is continuously transported to the sand collection hopper 103 by the action of the spiral blade shaft 401.

[0045] After the air source blower 501 is started, the air source enters the bottom of the sand suction pipe 505 through the second air passage 504, and mixes with the mud and sand in the sand suction pipe 505 to form a three-phase mixture with low density of gas, liquid and solid. Under the action of atmospheric pressure and water head in the pool, the mixture enters the gas-water separator 507 along the sand suction pipe 505. At this time, the gas in the mixture escapes rapidly and is discharged from the top of the gas-water separator 507. The remaining mud and sand flow into the high-speed shear machine 508. Under the action of the high-speed shear machine 508, the sludge attached to the sand and gravel is further broken up, and then flows along the sand discharge pipe 509 to the sand-water separator 7 for separation. Finally, the sand and gravel are separated, and the mud and water are returned to the front end of the sewage treatment plant.

[0046] The time control of this utility model system is as follows: the system starts and stops at a set time through the centralized control cabinet 8, and simultaneously links the sand separator 7, the spiral blade shaft 401, the air source fan 501, and the high-speed shear machine 508. Under the control of the program, they start and stop in sequence, and perform sand removal in a cycle. The duration and interval can be adjusted in the centralized control cabinet 8.

[0047] The mud and sand level control of this utility model system is controlled by a centralized control cabinet 8. The solenoid valve configured on the sewage pipe 606 is briefly opened and then stopped at regular intervals, so that the mud and sand level measurement system 6 is briefly circulated to ensure that the mud and sand level in the mud level gauge installation tank 604 is balanced with the mud level in the sand collection hopper 103. After a period of stillness, the mud and sand in the mud level gauge installation tank 604 are allowed to settle naturally. Then, the feedback signal of the float mud and sand level gauge in the mud level gauge installation tank 604 is detected (the float density is slightly greater than that of water and less than that of mud and sand mixture with a solid content of 1%. The float can float on the mud-water interface and can track the rise and fall of the mud surface well). When the feedback signal exceeds the set value, a sand discharge cycle is performed according to the above time control logic.

[0048] In addition to the two control methods mentioned above, manual control can also be performed on-site, which facilitates on-site debugging and maintenance.

[0049] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", "one end", "one side", "both ends", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or any direct application to other situations, fall within the protection scope of the present invention.

Claims

1. A horizontal flow fine sand removal device, comprising a pool body (1), a water inlet (101) and a water outlet (105) are arranged at the front and rear ends of the pool body (1) respectively, and a sedimentation zone (102) is arranged at the lower part of the pool body (1), characterized in that, The bottom of the middle position of the sedimentation area (102) is provided with a sand collecting hopper (103), the pool body (1) is provided with a water outlet weir (104) near the water outlet (105); the lower part of the sedimentation area (102) is provided with a spiral blade shaft (401) along the water inlet and outlet direction, the spiral blade shaft (401) is used for conveying the sediment to the sand collecting hopper (103); the blades on the spiral blade shaft (401) are symmetrically arranged on both sides of the sand collecting hopper (103) as the center.

2. The device according to claim 1, wherein A plurality of inclined plate groups (3) are arranged in parallel in the pool body (1) along the water inlet and outlet direction, the inclined plate group (3) comprises a plurality of pairs of inclined plates arranged in parallel from top to bottom, each pair of the inclined plates is arranged in an inverted eight character shape, and a sedimentation gap is arranged between each pair of the inclined plates.

3. The device according to claim 1, wherein The pool body (1) is detachably connected with a water distribution and slag blocking hole plate (2) near the water inlet (101), a plurality of groups of water distribution holes (201) are arranged on the water distribution and slag blocking hole plate (2) at intervals, and the height of the water distribution and slag blocking hole plate (2) extends from the water surface to the bottom of the sedimentation area (102).

4. The device according to claim 1, wherein The bottom of the sedimentation area (102) is provided with a spiral blade shaft slot (402) along the water inlet and outlet direction, and the spiral blade shaft (401) is arranged in the spiral blade shaft slot (402).

5. The device according to claim 1, wherein The pool body (1) is provided with a driving platform (406) outside, the driving platform (406) is provided with a driving motor (405), and the rotating shaft of the driving motor (405) is connected with one end of the spiral blade shaft (401) through a chain wheel structure.

6. The device according to claim 1, wherein The sand removing device further comprises a sand removing and flushing separation system, the sand removing and flushing separation system comprises an air source fan (501), the air source fan (501) is connected with a first air path (502), the first air path (502) is connected to the aeration pipes (503) on both sides below the sedimentation area (102), and the aeration pipes (503) are correspondingly arranged below the sedimentation gaps of the inclined plate groups (3).

7. The device according to claim 6, wherein The air source fan (501) is connected with a second air path (504), the second air path (504) is connected with a sand suction pipe (505), and the suction nozzle at the lower end of the sand suction pipe (505) is arranged in the sand collecting hopper (103).

8. The device according to claim 7, wherein The upper end of the sand suction pipe (505) is connected to a gas-water separator (507), the gas-water separator (507) is connected to a high-speed shearing machine (508), and the high-speed shearing machine (508) is guided to a sand-water separator (7) through a sand discharging pipe (509).

9. The device according to claim 1, wherein The sand removal device further comprises a sand level measuring system, the sand level measuring system comprising a sand discharge pipe (601), an air source discharge pipe (602), a discharge pipe (603), a sand level gauge installation barrel (604), a rising pipe (605), a blowdown pipe (606), and a liquid level balance pipe (607), one end of the sand discharge pipe (601) being connected to the lower part of the sand suction pipe (505), the other end of the sand discharge pipe (601) being connected to the discharge pipe (603) and the sand level gauge installation barrel (604) respectively, the top of the sand level gauge installation barrel (604) being connected to the gas-water separator (507) through the rising pipe (605); one end of the air source discharge pipe (602) being connected to the end of the sand lifting air path (504), the other end of the air source discharge pipe (602) being connected to the bottom of the rising pipe (605); the sidewall of the rising pipe (605) being connected to the blowdown pipe (606), the blowdown pipe (606) being connected to the sand discharge pipe (509).

10. The device according to claim 9, wherein The sidewall of the rising pipe (605) is connected to the liquid level balance pipe (607), and the liquid level balance pipe (607) is arranged at the upper part of the near-clear liquid region of the sedimentation zone (102).

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