Gas stripping sand discharging device suitable for horizontal flow grit chamber
By designing a gas sand extraction and discharge device in an advection sand sink tank, the gas lift and gas flue pipe are used to lift the sand sink from the bottom of the pool to the top of the pool for sand-water separation, which solves the blockage, wear and high maintenance difficulties of the existing sand discharge methods. The problem is that efficient and low-cost sand removal and organic matter separation effects are achieved.
Patent Information
- Application Number
- CN202421060168.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing advection sand discharge method of sand sinks has problems such as easy blockage of static pressure sand drain pipes, chain sand removal machine chains are easily worn and difficult to repair, and poor labor intensity in the manual operating environment, resulting in high operating costs and maintenance difficulties.
Design a gas sand extraction and discharge device, including a sand collecting bucket, a sand discharge trough, a gas sand extraction unit and a sand water separator, and use a gas lifting pipe and a gas flush pipe to lift the sand sink from the bottom of the pool to the top of the pool. It is also separated by sand and water through a sand and water separator to achieve mechanically-free separation of sand and organic matter.
It achieves no mechanical wear, reduces operating costs and maintenance difficulties, improves the sand removal efficiency and operating effect of advection sand sinks, and reduces the operating costs and equipment wear in subsequent processing steps.
Smart Images
Figure CN222304873U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to an air lift sand discharge device suitable for a horizontal flow sand settling tank. Background Art
[0002] The grit chamber is a sewage pretreatment unit that uses physical principles to separate large particles with a relative density greater than 2.65 and a particle size greater than 0.2 mm from sewage. Its main function is to prevent pipes or equipment from being blocked and worn by gravel during subsequent treatment, and to reduce the load on subsequent treatment structures. According to the different flow patterns of sewage, common grit chambers generally include horizontal grit chambers, cyclone grit chambers, aerated grit chambers, etc.
[0003] The horizontal flow grit chamber is designed with the ideal grit chamber model. When the sewage residence time is equal to or greater than the designed grit settling time, the grit can be intercepted. After energy dissipation or rectification, the water flows into the tank, flows along the water flow direction to the end, and then flows out of the grit chamber. A sand collecting hopper is set at the bottom of the tank. Generally, the static pressure sand discharge method is used to remove the grit by gravity, or a chain-type sand remover is used to scrape the grit into the sand hopper, or a combination of manual sand discharge is used. At the same time, the horizontal flow grit chamber does not have the ability to separate organic matter on the grit, and a special sand washing device must be set up at the same time.
[0004] For municipal sewage that does not require a primary sedimentation tank, does not require subsequent nitrogen and phosphorus removal, and has a low influent pollution load, the horizontal flow grit chamber still has the characteristics of simple structure, high flexibility, and low investment, and is widely used in design. However, the existing sand discharge methods all have their own problems: (1) The static pressure sand discharge method, the sand discharge pipe and sand pump are easy to clog, and the sand discharge pipe, valve, and sand pump are expensive; (2) The chain of the chain-type sand removal machine is easy to wear, but it is an underwater mechanical equipment and is difficult to maintain; (3) The manual sand discharge method has a harsh operating environment and high labor intensity. For this reason, the air lift sand discharge method is invented and applied to the horizontal flow grit chamber. Utility Model Content
[0005] The utility model aims to provide an air lift sand discharge device suitable for a horizontal flow sand settling tank, and the sand discharge can be completed by arranging an air lift sand discharge pipeline and an air pipeline.
[0006] In order to achieve the above-mentioned purpose, the utility model proposes the following technical solution: an air lift sand discharge device suitable for a horizontal flow sand settling tank, installed on the horizontal flow sand settling tank (10), the air lift sand discharge device comprising:
[0007] A sand collecting hopper (1), wherein the sand collecting hopper (1) is continuously arranged at the bottom of the advection grit chamber (10) along the length of the chamber;
[0008] A sand discharge trough (2), wherein the sand discharge trough (2) is arranged on the top of the advection grit chamber (10), and the bottom of the sand discharge trough (2) is an inclined surface;
[0009] An air lift sand discharge unit is provided, wherein the air lift sand discharge unit lifts the sand at the bottom of the horizontal flow sand settling tank (10) into the sand discharge trough (2), and the air lift sand discharge unit comprises an air source (4), an air inlet pipe (5), an air lift pipe (6), a sand suction pipe (7) and an air flushing pipe (8), wherein the air inlet pipe (5) is connected to the air source (4), one end of the air lift pipe (6) is connected to the air inlet pipe (5), the other end of the air lift pipe (6) extends to the inside of the sand suction pipe (7), the diameter of the sand suction pipe (7) is larger than the diameter of the air lift pipe (6), the other end of the sand suction pipe (7) is connected to the sand discharge trough (2), one end of the air flushing pipe (8) is connected to the air inlet pipe (5), and the other end of the air flushing pipe (8) extends into the sand and gravel at the bottom of the horizontal flow sand settling tank (10).
[0010] Furthermore, the utility model also includes a sand-water separator (3), wherein the sand discharge trough (2) guides the settled sand into the sand-water separator (3), and the sand-water separator (3) is connected to a drainage pipe (9).
[0011] Furthermore, in the utility model, the sand collecting hopper (1) is made of PP or stainless steel, and the opening angle of the sand collecting hopper (1) is greater than 55°.
[0012] Furthermore, in the utility model, one sand collecting hopper (1) corresponds to one sand suction pipe (7), and the sand suction pipe (7) is aligned with the center of the sand collecting hopper (1).
[0013] Furthermore, in the present invention, the air source (4) is a fan.
[0014] Beneficial effects: The technical solution of this application has the following technical effects:
[0015] The utility model sets continuous sand collecting hoppers along the length of the pool at the bottom of the horizontal flow grit chamber, sets sand discharge troughs on the top of the pool, uses air lift to suck the sand at the bottom of the pool to the sand discharge trough on the top of the pool, and then leads the sand to the sand-water separator for sand-water separation. There are no mechanical parts, the structure is simple, and there is no system wear. At the same time, it has two functions of air lift and air flushing on the sand at the bottom of the horizontal flow grit chamber, which is conducive to enhancing the operation effect of the horizontal flow grit chamber and reducing the operation cost and maintenance difficulty of the water treatment operation of the existing sewage treatment plant.
[0016] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.
[0017] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:
[0019] Figure 1 It is a schematic diagram of the structural section of the utility model.
[0020] Figure 2 This is a structural system diagram of the utility model.
[0021] In the figure, the meaning of each figure mark is as follows: 1. sand collecting bucket; 2. sand discharge trough; 3. sand-water separator; 4. air source; 5. air inlet pipe; 6. air lift pipe; 7. sand suction pipe; 8. air flushing pipe; 9. drainage pipe; 10. horizontal flow sand settling tank; 11. subsequent treatment tank. DETAILED DESCRIPTION
[0022] In order to better understand the technical content of the utility model, specific embodiments are cited and described as follows in conjunction with the accompanying drawings. In this disclosure, various aspects of the utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the accompanying drawings. The embodiments of the present disclosure are not necessarily defined to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the utility model are not limited to any implementation method. In addition, some aspects disclosed in the utility model can be used alone, or used in any appropriate combination with other aspects disclosed in the utility model.
[0023] like Figure 1-2 As shown, an air lift sand discharge device suitable for a horizontal grit chamber is installed on a horizontal grit chamber 10. The air lift sand discharge device comprises a sand collecting hopper 1, a sand discharge trough 2, a sand-water separator 3 and an air lift sand discharge unit. The sand collecting hoppers 1 are continuously arranged along the length direction of the horizontal grit chamber 10 at the bottom of the horizontal grit chamber 10. There are four sand collecting hoppers 1. The sand collecting hoppers 1 are made of PP material. The opening angle of the sand collecting hoppers 1 is 60°. By arranging a plurality of continuous sand collecting hoppers 1, sand and gravel can be quickly collected.
[0024] The sand discharge trough 2 is arranged on the top of the horizontal flow sand settling tank 10, and the bottom of the sand discharge trough 2 is an inclined surface, that is, a certain slope is formed inside the sand discharge trough 2, and the sand and water mixture is connected to the sand and water separator 3, and the sand and water separator 3 is connected with a drainage pipe 9, and the drainage pipe 9 discharges the sewage to the sewage inspection well in the factory area;
[0025] Specifically, the air lift sand discharge unit lifts the sand at the bottom of the horizontal flow sand settling tank 10 into the sand discharge trough 2. The air lift sand discharge unit includes an air source 4, an air inlet pipe 5, an air lift pipe 6, a sand suction pipe 7 and an air flushing pipe 8. The air source 4 is a fan. The air inlet pipe 5 is connected to the fan. One end of the air lift pipe 6 is connected to the air inlet pipe 5. The other end of the air lift pipe 6 extends to the inside of the sand suction pipe 7. The diameter of the sand suction pipe 7 is larger than the diameter of the air lift pipe 6. The other end of the sand suction pipe 7 is connected to the sand discharge trough 2. The sand suction pipe 7 is aligned with the center of the sand collecting bucket 1. One sand collecting bucket 1 corresponds to one sand suction pipe 7. One end of the air flushing pipe 8 is connected to the air inlet pipe 5. The other end of the air flushing pipe 8 extends into the sand and gravel at the bottom of the horizontal flow sand settling tank 10. The air inlet pipe 5, the air lift pipe 6 and the air flushing pipe 8 can be provided with corresponding valves as needed.
[0026] After the installation of the device is completed, the fan is turned on, and air is introduced into the sand suction pipe 7 through the air lift pipe 6 to form a three-phase flow of air, water and sand. The relative density of the air, water and sand mixture is reduced. Relying on the density difference between the air, water and sand mixture and the sewage, the air, water and sand mixture with a smaller density floats in the sand suction pipe, and the sediment leaves the sewage during the rising process of the air, water and sand mixture, realizing the function of lifting the sediment to the outside of the sedimentation tank. That is, it rises along the sand suction pipe 7 to the top of the tank and enters the sand discharge trough 2. The sand and water mixture enters the sand and water separator 3 through the sand discharge trough 2 for separation. At the same time, according to the operation needs, the air flushing pipe 8 is opened to stir the sediment at the bottom of the sand collecting hopper 1 with air to reduce the compaction of sediment.
[0027] For a grit chamber that operates ideally, it is best to separate the organic components attached to the surface of the grit while removing all the inorganic grit, so as to facilitate the final disposal of the grit and the subsequent biochemical treatment of the sewage. Therefore, the main issue to consider when considering the grit chamber is: through effective hydraulic design, as much grit as possible can be stably settled and reliably discharged out of the tank, while the air blown out by the air lift pipe 6 and the air flushing pipe 8 vibrates the grit, so that as much organic matter attached to the inorganic particles as possible falls off the inorganic particles, re-enters the sewage, and then provides organic matter for subsequent biochemical treatment. This embodiment simultaneously separates the organic matter attached to the surface of the grit from air and water, achieving the purpose of separating and refluxing the organic matter.
[0028] This embodiment improves the efficiency of sand removal in the horizontal flow sand settling tank, reduces the decline in the operating effect of the subsequent treatment link and the wear of the equipment caused by incomplete sand removal, and avoids the need for additional carbon sources in the biochemical link due to excessive organic matter carried during sand removal, thereby providing a relatively suitable living environment for microorganisms. The device has low material cost, simple structure, low cost, and short construction period. The device does not have sand pumps, vacuum pumps and other equipment with high failure rates for air lift sand removal. The control process is simple, the operation is stable, and energy consumption is reduced.
[0029] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.
[0030] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.
Claims
1. An air lift sand removal device suitable for a horizontal flow grit chamber, installed on the horizontal flow grit chamber (10), characterized in that: The air lift sand removal device comprises: A sand collecting hopper (1), wherein the sand collecting hopper (1) is continuously arranged at the bottom of the advection grit chamber (10) along the length of the chamber; A sand discharge trough (2), wherein the sand discharge trough (2) is arranged on the top of the advection grit chamber (10), and the bottom of the sand discharge trough (2) is an inclined surface; An air lift sand discharge unit is provided, wherein the air lift sand discharge unit lifts the sand at the bottom of the horizontal flow sand settling tank (10) into the sand discharge trough (2), and the air lift sand discharge unit comprises an air source (4), an air inlet pipe (5), an air lift pipe (6), a sand suction pipe (7) and an air flushing pipe (8), wherein the air inlet pipe (5) is connected to the air source (4), one end of the air lift pipe (6) is connected to the air inlet pipe (5), the other end of the air lift pipe (6) extends to the inside of the sand suction pipe (7), the diameter of the sand suction pipe (7) is larger than the diameter of the air lift pipe (6), the other end of the sand suction pipe (7) is connected to the sand discharge trough (2), one end of the air flushing pipe (8) is connected to the air inlet pipe (5), and the other end of the air flushing pipe (8) extends into the sand and gravel at the bottom of the horizontal flow sand settling tank (10).
2. The air lift sand removal device suitable for a horizontal flow sand settling tank according to claim 1, characterized in that: It also comprises a sand-water separator (3), wherein the sand discharge trough (2) guides the settled sand into the sand-water separator (3), and the sand-water separator (3) is connected to a drainage pipe (9).
3. The air lift sand removal device suitable for a horizontal flow sand settling tank according to claim 1, characterized in that: The sand collecting hopper (1) is made of PP or stainless steel, and the opening angle of the sand collecting hopper (1) is greater than 55°.
4. The air lift sand removal device suitable for a horizontal flow sand settling tank according to claim 1, characterized in that: One sand collecting hopper (1) corresponds to one sand suction pipe (7), and the sand suction pipe (7) is aligned with the center of the sand collecting hopper (1).
5. The air lift sand removal device suitable for a horizontal flow sand settling tank according to claim 1, characterized in that: The air source (4) is a fan.