Horizontal flow grit chamber

Abstract

The utility model relates to sewage treatment technical field especially relates to a sewage treatment is with horizontal flow type grit chamber, including pool body, sewage passage and the mud outlet bin, the bottom of pool body is equally spaced along the water flow direction and is provided with a plurality of inclined side wall mud collecting groove, a plurality of mud collecting groove bottom all are linked with sewage passage, and the sewage passage is inclined setting, the input end of mud outlet bin is linked with the lower end of sewage passage position intercommunication, is used for depositing the sludge that slides in sewage passage, and the inside of mud outlet bin is equipped with the sludge discharge assembly for discharging sludge, the utility model discloses through the mud collecting groove of inner wall inclination setting, makes sludge under the gravity effect of itself can move downward and collect, the whole course does not have mechanical component contact sludge layer, fundamentally eliminates the source of mechanical disturbance, and discharges to the mud outlet bin through the sludge discharge channel, then again through sludge discharge assembly and discharges sludge uniformly.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a horizontal flow grit chamber for wastewater treatment. Background Technology

[0002] As a commonly used piece of equipment in the field of wastewater treatment, horizontal flow sedimentation tanks are widely used in municipal sewage, industrial wastewater and other treatment scenarios due to their simple structure and stable operation. Their core function is to separate solids and liquids by allowing suspended particles in the water to settle under gravity through the horizontal flow of water.

[0003] In the operation of horizontal flow sedimentation tanks, sludge removal is a crucial step in ensuring treatment effectiveness. Traditional horizontal flow sedimentation tanks typically have a flat bottom and often employ mechanical scrapers for sludge removal. When a traditional gantry-type scraper scrapes sludge laterally along the width of the tank, the friction between the scraper blade and the tank bottom, along with the lateral pushing of the water flow, causes settled sludge particles to re-enter the water body, pushing the settled sludge at the bottom laterally or longitudinally and collecting it in a sludge collection trough for discharge. However, during sludge removal, the rigid contact between the scraper blade and the tank bottom, as well as the water flow disturbance generated when pushing the sludge, can easily cause the settled sludge to resuspend, reducing sedimentation efficiency and affecting effluent quality. Based on these issues, a horizontal flow grit chamber for wastewater treatment needs to be designed to address these problems. Utility Model Content

[0004] This invention provides a horizontal flow grit chamber for wastewater treatment to solve the problem that sludge is easily resuspended during sludge scraping in the prior art.

[0005] The technical problem solved by this utility model is achieved by the following technical solution:

[0006] A horizontal flow grit chamber for wastewater treatment includes a tank body, a sewage discharge channel, and a sludge discharge chamber. The bottom of the tank body is provided with multiple sludge collection troughs with inclined sidewalls at equal intervals along the water flow direction. The bottom of each of the multiple sludge collection troughs is connected to the sewage discharge channel, which is inclined. The input end of the sludge discharge chamber is connected to the lower end of the sewage discharge channel and is used to store sludge that slides down in the sewage discharge channel. The interior of the sludge discharge chamber is provided with a sludge discharge assembly for discharging sludge.

[0007] Preferably, the slope of the sidewalls of the plurality of sludge collection troughs gradually increases along the direction of water flow.

[0008] Preferably, a transition section is provided between two adjacent mud collection troughs, and the transition section is an upwardly arched arc shape.

[0009] Preferably, the inner wall of the sludge collection trough is provided with a plurality of parallel guide ribs, and a guide channel is formed between two adjacent guide ribs on the inner wall of each sludge collection trough.

[0010] Preferably, the inner wall of the sludge collection trough and the bottom of the sewage discharge channel are both equipped with vibrators.

[0011] Preferably, the sludge discharge assembly includes a rotating shaft rotatably connected to the sludge discharge chamber and spiral conveying blades disposed on the rotating shaft, and the outer wall of the sludge discharge chamber is provided with a driving component for driving the rotating shaft to rotate.

[0012] The beneficial effects of this utility model are as follows: the sludge collection trough with its inclined inner wall allows the sludge to move downwards under its own gravity for centralized collection. There are no mechanical parts in contact with the sludge layer throughout the process, which fundamentally eliminates the source of mechanical disturbance. The sludge is then discharged into the sludge discharge chamber through the sludge discharge channel, and then discharged uniformly through the sludge discharge assembly. When the sludge discharge assembly is in operation, the sludge discharge chamber is far away from the pool body, which further reduces the disturbance to the water flow in the pool body during the sludge discharge operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 Schematic diagram of the isometric structure provided by this utility model Figure 1 ;

[0015] Figure 2 Schematic diagram of the isometric structure provided by this utility model Figure 2 ;

[0016] Figure 3 Schematic diagram of the cross-sectional structure provided by this utility model Figure 1 ;

[0017] Figure 4 Schematic diagram of the cross-sectional structure provided by this utility model Figure 2 .

[0018] In the diagram, 1 is the pool body; 2 is the sludge collection trough; 21 is the transition section; 22 is the guide ribs; 23 is the guide channel; 3 is the sewage discharge channel; 4 is the sludge discharge bin; 5 is the sludge discharge assembly; 51 is the rotating shaft; 52 is the spiral conveyor blade; 53 is the driving component; and 6 is the vibrator. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0020] Reference Figures 1-4 As shown, a horizontal flow grit chamber for wastewater treatment includes a tank body 1. Inlet pipes and outlet pipes are respectively installed on the inner walls of both sides of the tank body 1. Water enters the tank body 1 through the inlet pipes, and the sludge particles gradually settle before being discharged through the outlet pipes. Multiple sludge collection troughs 2 with inclined sidewalls are equidistantly arranged at the bottom of the tank body 1 along the water flow direction. The bottoms of the multiple sludge collection troughs 2 are connected to a common discharge channel 3, which is also inclined. The settled sludge settles into the sludge collection troughs 2 under its own gravity and enters the discharge channel 3. Once settled, the sludge slides along the inclined sidewalls into the sludge collection troughs 2 under gravity, quickly leaving the main water flow area at the bottom of the tank body 1 and entering the relatively enclosed interior of the sludge collection troughs 2. The water flow velocity in the sludge collection tank 2 is much lower than that in the mainstream area (driven only by the sludge's own weight). The sludge is in a relatively stable static or slow-flowing state in the sludge collection tank 2. Even if there is a slight water flow disturbance in the mainstream area of ​​the tank 1, it is difficult to affect the sludge in the sludge collection tank 2. Furthermore, the lower end of the sewage discharge channel 3 is connected to the sludge discharge chamber 4. Through the inclination of the sewage discharge channel 3, the sludge moves downward into the sludge discharge chamber 4 under its own gravity. The sludge discharge chamber 4 is equipped with a sludge discharge component 5 for discharging sludge. By setting the sludge discharge chamber 4 away from the tank 1, the disturbance to the water in the tank 1 is reduced when the sludge discharge component 5 is working. This reduces the re-suspension of sludge that has settled in the tank 1 due to water flow, thus reducing the impact on the effluent quality and sedimentation effect.

[0021] The sludge discharge assembly 5 includes a rotating shaft 51 rotatably connected to the sludge discharge chamber 4 and a spiral conveying blade 52 disposed on the rotating shaft 51. The outer wall of the sludge discharge chamber 4 is provided with a driving component 53 for driving the rotating shaft 51 to rotate. The driving component 53 can be a device such as a geared motor, which drives the rotating shaft 51 and the spiral conveying blade 52 to rotate, so that the sludge collected in the sludge discharge chamber 4 can be discharged from the outlet of the sludge discharge chamber 4.

[0022] Reference Figure 3 As shown, furthermore, the slope of the sidewalls of the multiple sludge collection troughs 2 gradually increases along the direction of water flow. The initial water in the sludge collection trough 2 at the inlet end of the pool body 1 contains more sludge particles and has a larger mass. Even if the slope of the sidewall of the sludge collection trough 2 at the inlet end of the pool body 1 is small, it will slide downwards due to the large number of sludge particles and its own gravity. As the water flows continuously, the water flowing to the downstream end of the pool body 1 contains less sludge and has a lighter mass. The slope of the sidewall of the sludge collection trough 2 becomes larger, which facilitates the sliding of the settled sludge.

[0023] The transition section 21 is provided between two adjacent sludge collection tanks 2. The transition section 21 is an upward-arched arc shape, which can eliminate the dead corners of sludge retention that are easily formed by right-angle structures through the smooth curved surface. This allows the settled sludge to slide naturally along the arc surface to the two sludge collection tanks 2 on both sides, avoiding accumulation in the transition area. At the same time, the streamlined arc design can guide the water flow to pass smoothly, reduce the eddies caused by sudden changes in water flow direction, reduce disturbance to the settled sludge, and the smooth edge can prevent the sludge from rebounding or adhering when it slides into the sludge collection tank 2, further improving the integrity and stability of sludge collection.

[0024] Reference Figure 2 As shown, furthermore, the inner wall of the sludge collection tank 2 is provided with multiple parallel guide ribs 22, and a guide channel 23 is formed between two adjacent guide ribs 22 on the inner wall of each sludge collection tank 2. This can guide the sludge entering the sludge collection tank 2 in a directional manner, preventing the sludge from spreading randomly in the sludge collection tank 2 or shifting laterally due to water flow fluctuations, and ensuring that the sludge smoothly converges to the sewage discharge channel 3 along the guide channel 23. At the same time, the guide ribs 22 can reduce the turbulence of the water flow in the tank, reduce the scouring and disturbance of the sludge by the water flow, and can be combined with the arc-shaped transition section 21 to further improve the efficiency and stability of sludge collection, solving the problem of disordered sludge flow and easy retention in the traditional sludge collection tank 2.

[0025] After prolonged operation, some sludge accumulates on the side walls of the sludge collection tank 2 and the bottom inner wall of the sewage discharge channel 3. Therefore, vibrators 6 are installed on the inner wall of the sludge collection tank 2 and the bottom of the sewage discharge channel 3. The vibrators 6 generate low-frequency mechanical vibration through the rotation of the built-in eccentric wheel or electromagnetic vibration principle. The vibration frequency is controlled within a range that will not disturb the upper layer of clear water and the normally flowing sludge in the tank. The mechanical force generated by the low-frequency vibration of the vibrators 6 causes the sludge accumulated on the side walls of the sludge collection tank 2 and the bottom inner wall of the sewage discharge channel 3 after prolonged operation to detach from the attachment surface and re-enter the guide channel 23 or the sewage discharge path. This design effectively prevents sludge from hardening or clogging due to long-term adhesion, ensuring that the sludge collection tank 2 and the sewage discharge channel 3 remain unobstructed. Combined with the directional guiding effect of the guide ribs 22, the efficiency of sludge collection and discharge can still be maintained even after long-term operation of the equipment.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A horizontal flow grit chamber for wastewater treatment, characterized in that, include; The bottom of the pool body (1) is provided with multiple mud collection troughs (2) with inclined side walls at equal intervals along the water flow direction. The bottom of each of the multiple sludge collection troughs (2) is connected to the sewage discharge channel (3), and the sewage discharge channel (3) is inclined. The sludge discharge bin (4) is connected to the lower end of the sewage discharge channel (3) and is used to store the sludge that slides down in the sewage discharge channel (3). The sludge discharge bin (4) is equipped with a sludge discharge assembly (5) for discharging the sludge.

2. The horizontal flow grit chamber for wastewater treatment according to claim 1, characterized in that, The slope of the sidewalls of the multiple mud collection troughs (2) gradually increases along the direction of water flow.

3. A horizontal flow grit chamber for wastewater treatment according to claim 1, characterized in that, A transition section (21) is provided between two adjacent mud collection tanks (2), and the transition section (21) is an upwardly arched arc shape.

4. A horizontal flow grit chamber for wastewater treatment according to claim 1, characterized in that, The inner wall of the mud collection trough (2) is provided with a plurality of parallel guide ribs (22), and a guide channel (23) is formed between two adjacent guide ribs (22) on the inner wall of each mud collection trough (2).

5. A horizontal flow grit chamber for wastewater treatment according to claim 1, characterized in that, Vibrators (6) are provided on the inner wall of the sludge collection tank (2) and at the bottom of the sewage discharge channel (3).

6. A horizontal flow grit chamber for wastewater treatment according to claim 1, characterized in that, The sludge discharge assembly (5) includes a rotating shaft (51) rotatably connected to the sludge discharge chamber (4) and a spiral conveying blade (52) provided on the rotating shaft (51), and a driving component (53) for driving the rotating shaft (51) to rotate is provided on the outer wall of the sludge discharge chamber (4).

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