Sludge discharge structure for sewage treatment

Abstract

This utility model relates to the field of wastewater treatment technology, specifically disclosing a sludge discharge structure for wastewater treatment. It includes a rotating shaft rotatably disposed within a sludge discharge outlet, a rotating support fixed to the outside of the rotating shaft, a derivative support fixed to the rotating support, and several scrapers located at the bottom of the derivative supports for scraping sludge adhering to the bottom of the wastewater treatment tank. It also includes a spray assembly mounted on the derivative support and a water supply pipe fixed to the rotating shaft for supplying water to the spray assembly. The spray assembly includes a spray pipe, an adapter connecting the spray pipe and the water supply pipe, and several first spray heads fixed to the spray pipe. This design solves the problem that in traditional wastewater sedimentation tanks, sludge located on the outer side takes longer to move from the outside of the sedimentation tank to the sludge discharge outlet, resulting in a prolonged sludge discharge process.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and specifically discloses a sludge discharge structure for wastewater treatment. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. The wastewater treatment process includes the removal and cleaning of impurities carried in the wastewater, including the removal of solid particles, the sedimentation and precipitation of sludge, and its discharge.

[0003] Traditionally, sewage treatment ponds are used to settle the mud-water mixture in the sewage. After the sludge settles, the water without sludge is discharged, and then the settled sludge is discharged.

[0004] In existing technologies, a sludge scraping structure is also installed in the wastewater treatment tank to assist in the discharge of settled sludge. For wastewater treatment tanks with the sludge discharge outlet located in the center, the sludge scraping structure includes a rotating shaft installed rotatably inside the wastewater treatment tank, a rotating support mounted on the rotating shaft, a derivative support mounted on the rotating support, and several scrapers mounted on the derivative supports for scraping sludge from the bottom of the wastewater treatment tank. The rotating shaft drives the rotating support to rotate, and during the rotation, the scrapers discharge the sludge adhering to the bottom of the wastewater treatment tank towards the sludge discharge outlet, thereby achieving sludge discharge.

[0005] However, because the sludge itself has a certain stickiness, the outer sludge needs to be delivered multiple times before it can be discharged into the sludge outlet during the scraping process. Each sludge discharge process takes a long time.

[0006] Therefore, the inventors have provided a sludge discharge structure for wastewater treatment in order to solve the above-mentioned problems. Utility Model Content

[0007] The purpose of this invention is to solve the problem that in the traditional sewage sedimentation tank, the sludge located on the outside of the sedimentation tank takes more time to move from the outside of the sedimentation tank to the sludge discharge outlet, resulting in a long sludge discharge process.

[0008] To achieve the above objectives, the basic solution of this utility model provides a sludge discharge structure for sewage treatment, including a rotating shaft rotatably disposed within a sludge discharge outlet, a rotating bracket fixed to the outside of the rotating shaft, a derivative bracket fixed to the rotating bracket, and several scrapers disposed at the bottom of the derivative bracket for scraping off sludge adhering to the bottom of the sewage treatment tank. A pedestrian bracket with its end sliding at the top edge of the sewage treatment tank is also fixedly connected to the top of the rotating shaft. A traveling structure that fits against the sewage treatment tank and can drive the pedestrian bracket to slide is also fixedly connected to the end of the pedestrian bracket. The structure also includes a spray assembly disposed on the derivative bracket and a water supply pipe fixed to the rotating shaft for supplying water to the spray assembly. The spray assembly includes a spray pipe, an adapter connecting the spray pipe and the water supply pipe, and several first spray heads fixed to the spray pipe.

[0009] Furthermore, the first spray heads are all positioned facing the bottom surface of the sewage treatment tank in front of the direction of the scraper's movement.

[0010] Furthermore, it also includes several second spray heads fixed to the spray pipe, with the first spray head and the second spray head arranged in parallel.

[0011] Furthermore, the second spray heads are all positioned facing the scraper.

[0012] Furthermore, the adapter has a connecting chamber for connecting the spray pipe and the water supply pipe. One side of the adapter has an inlet that connects to the connecting chamber and is used to connect to the water supply pipe, and the other side has a spray outlet that connects to the connecting chamber and is used to connect to the spray pipe.

[0013] Furthermore, the spray pipe is rotatably connected to the spray outlet, and the adapter is equipped with a swing structure driven by water flow to make the spray pipe swing back and forth.

[0014] Furthermore, the swing structure includes a partition fixed in the communicating chamber and separating the water inlet and the spray outlet, a drive shaft rotatably connected to the partition, several fan blades fixed to the outer wall of the drive shaft on one side of the water inlet and driven by the water flow, a water outlet opened on the partition and allowing water flow, and a reciprocating swing mechanism fixed between the drive shaft and the spray pipe on the spray outlet side and controlling the swing of the spray pipe.

[0015] Furthermore, the reciprocating swing mechanism includes a main turntable fixed to the transmission shaft, an active lever fixed to the main turntable, a secondary turntable fixed to the spray pipe, and a driven lever slidably connected to the secondary turntable and movable by the active lever. The secondary turntable has an arc-shaped groove for the end of the driven lever to slide inward. Both ends of the driven lever are inclined surfaces facing the same side. The end of the arc-shaped groove has a conical groove for accommodating the end of the driven lever. A first return spring is also provided in the arc-shaped groove for pushing the driven lever out of the conical groove. A reset mechanism for resetting the spray pipe is also provided in the spray outlet.

[0016] The principle and effect of this solution are as follows:

[0017] 1. Compared with the prior art, this utility model can spray water onto the sludge to be scraped and the sludge being scraped during the continuous scraping of the bottom of the sewage treatment tank by the rotating shaft and the scraper, so as to dilute the sludge and reduce its viscosity and increase its fluidity. In addition, it can also clean the sewage treatment tank in the later stage of sludge discharge. This solves the problem that in the traditional sewage sedimentation tank, the sludge on the outside of the sewage sedimentation tank needs to take more time to move from the outside of the sewage sedimentation tank to the sludge discharge port, resulting in a long sludge discharge process.

[0018] 2. Compared with the prior art, the first spray head installed in the spray assembly of this utility model can spray the sludge to be scraped and the sludge accumulated in front of the scraper after scraping, diluting and rinsing the sludge and increasing its fluidity. The installed second spray head can directly rinse the sludge covering the scraper to prevent sludge from continuously adhering to the scraper and affecting the sludge scraping operation.

[0019] 3. Compared with the prior art, the spray pipe of this utility model can reciprocate and swing, which can generate a fan-shaped spray surface. During the continuous scraping process of the scraper, the fan-shaped spray surface generated by the swing of the spray pipe continuously washes the sludge being scraped, the sludge to be scraped, and the sludge on the scraper, thereby accelerating the discharge of sludge. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a sludge discharge structure for wastewater treatment according to an embodiment of this application is shown;

[0022] Figure 2 A partial schematic diagram of a sludge discharge structure for wastewater treatment according to an embodiment of this application is shown;

[0023] Figure 3 A schematic diagram of an adapter for a sludge discharge structure for wastewater treatment, according to an embodiment of this application, is shown.

[0024] Figure 4 This paper shows a schematic diagram of a reciprocating oscillating structure of a sludge discharge structure for wastewater treatment according to an embodiment of this application;

[0025] Figure 5A schematic diagram of a reciprocating oscillating structure of a sludge discharge structure for wastewater treatment, as proposed in an embodiment of this application, is shown. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] The reference numerals in the accompanying drawings include: 1. Sewage treatment tank; 2. Derivative support; 3. Scraper; 4. Rotating shaft; 5. Connecting water pipe; 6. Spray pipe; 7. Adapter; 8. Inlet; 9. Outlet; 10. Drive shaft; 11. Fan blade; 12. Active lever; 13. Driven lever; 14. Inclined surface; 15. Secondary turntable; 16. Main turntable; 17. Reset block.

[0028] A sludge discharge structure for wastewater treatment, implementing, for example Figure 1 As shown:

[0029] The system includes a rotatable shaft 4 installed at the sludge discharge outlet of the wastewater treatment tank 1, a rotating bracket fixedly installed on the outside of the shaft 4, derivative brackets 2 fixedly installed on both sides of the rotating bracket, and several scrapers 3 respectively installed at the bottom of the derivative brackets 2. The bottom of the scrapers 3 is inclined and fits against the bottom of the wastewater treatment tank 1 to scrape off the sludge adhering to the bottom of the wastewater treatment tank 1. A pedestrian support is also fixedly installed on the top of the shaft 4. The end of the pedestrian support is installed at the top edge of the wastewater treatment tank 1, and a traveling structure that fits against the top of the wastewater treatment tank 1 and can drive the pedestrian support to slide along the top of the wastewater treatment tank 1 is also fixedly installed at the end of the pedestrian support. In this embodiment, the above structures all adopt the sludge discharge structure commonly used in the prior art for wastewater treatment tanks 1.

[0030] In this embodiment, a spray assembly is also installed on the derivative support 2, and a water spray pipe for supplying water to the spray assembly is also installed on the rotating shaft 4. Water is supplied to the spray assembly from an external water source through the water spray pipe. Furthermore, in this embodiment, the rotating shaft 4 rotates clockwise, and the scraper 3 is installed in a clockwise direction.

[0031] like Figure 2 and Figure 4 As shown, the spray assembly includes a spray pipe 6, an adapter 7 installed between the spray pipe 6 and the water supply pipe, and several first spray heads installed on the spray pipe 6 for spraying water flow. A connecting support plate is welded on the derivative bracket 2 above each scraper 3 to fix the connector.

[0032] Several second spray heads parallel to the first spray head are also installed on the spray pipe 6. The first spray heads are all set towards the bottom surface of the sewage treatment tank 1 on the right side of the scraper 3, and the second spray heads are all set towards the bottom of the scraper 3.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, the adapter 7 has a connecting chamber for connecting the spray pipe 6 and the water supply pipe. The bottom left side of the adapter 7 has a water inlet 8 that connects to the connecting chamber. A water supply branch pipe is installed between the water supply pipe and the water inlet 8. The right side of the adapter 7 has a spray outlet that connects to the connecting chamber and is used to connect the spray pipe 6.

[0034] In this embodiment, the spray pipe 6 is rotatably connected to the spray outlet, and the left end of the spray pipe 6 extends into the communicating chamber. A swinging structure, driven by water flow, is also provided inside the adapter 7 to allow the spray pipe 6 to reciprocate in a swinging motion.

[0035] The oscillating structure includes a partition plate fixedly installed in the connecting chamber and used to separate the water inlet 8 from the spray outlet, a drive shaft 10 mounted on the partition plate and rotatable, several fan blades 11 fixedly installed on the outer wall of the drive shaft 10 on one side of the water inlet 8 and driven by the water flow, and a reciprocating oscillating mechanism installed between the drive shaft 10 and the spray pipe 6 on the spray outlet side and controlling the oscillation of the spray pipe 6. An outlet 9 connecting the two chambers is also opened on the partition plate, and the distance between adjacent fan blades 11 is smaller than the distance between the outlet 9 and the water inlet 8.

[0036] The reciprocating oscillating mechanism includes a main turntable 16 fixedly mounted on the drive shaft 10, an active lever 12 fixedly mounted on the main turntable 16, a secondary turntable 15 fixedly mounted on the spray pipe 6, and a driven lever 13 mounted on the secondary turntable 15 and movable by the active lever 12. A gap is left between the right end face of the drive shaft 10 and the spray pipe 6 to allow water to flow into the spray pipe 6, and the drive shaft 10 and the spray pipe 6 are coaxially arranged.

[0037] An arc-shaped groove is formed on the secondary turntable 15, allowing the right end of the driven lever 13 to slide inward. Limiting grooves are formed on both inner sides of the arc-shaped groove. An arc-shaped receiving groove is also formed on the secondary turntable 15 at the left end of the arc-shaped groove. A first return spring that can extend into the arc-shaped groove is installed in the receiving groove. A conical groove is also formed inward at the left end of the arc-shaped groove. In this embodiment, both ends of the driven lever 13 are inclined counterclockwise. A groove perpendicular to the limiting groove is formed on both sides of the driven lever 13, and a spherical limiting block that can slide within the limiting groove is installed in the groove.

[0038] The spray outlet is also equipped with a reset mechanism to reset the spray pipe 6. Specifically, an arc-shaped reset groove is opened at the top of the spray outlet, and a reset block 17 is integrally formed on the top of the spray pipe 6. A second reset spring is installed in the arc-shaped reset groove on the left side of the reset block 17. The arc of the arc-shaped reset groove is equal to the arc of the arc-shaped slide.

[0039] Combination Figure 3 and Figure 4 As shown, in this embodiment, the water flowing in from the inlet 8 pushes the fan blade 11 and flows out from the outlet 9, into the spray pipe 6. When pushing the fan blade 11, it drives the transmission shaft 10 to rotate counterclockwise, and simultaneously drives the main turntable 16 and the active lever 12 to rotate counterclockwise. The end of the active lever 12 abuts against the inclined surface 14 of the end of the driven lever 13 and brings it from the right end of the arc-shaped groove to the left end of the arc-shaped groove. During this process, the spray pipe 6 rotates counterclockwise until the active lever 12 abuts the inner end of the driven lever 13 into the conical groove, so that the active lever 12 and the driven lever 13 are disengaged. The first return spring resets the driven lever 13, and the second return spring resets the spray pipe 6. The continuous rotation of the transmission shaft 10 enables the spray pipe 6 to continuously oscillate back and forth to form a spray fan surface.

[0040] When this utility model is in use, the rotating shaft 4 is driven by the traveling structure to rotate, which drives the scraper 3 to continuously scrape the sludge at the bottom of the sewage treatment tank 1 into the sludge discharge outlet. During the sludge scraping, water is sprayed onto the sludge to be scraped and the sludge being scraped through the spraying component to dilute the sludge and reduce its viscosity, thereby increasing the fluidity of the sludge. In the later stage of sludge discharge, it can also play a role in cleaning the sewage treatment tank 1.

[0041] Specifically, the first spray head sprays the sludge to be scraped and the sludge accumulated in front of the scraper 3 after scraping, diluting and rinsing the sludge to increase its fluidity. The second spray head directly rinses the sludge covering the scraper 3 to prevent sludge from continuously adhering to the scraper 3 and affecting the sludge scraping operation.

[0042] The water flow drives the fan blades 11, causing the driven shaft to rotate. The active lever 12 continuously moves the driven lever 13 to make the spray pipe 6 swing back and forth, creating a fan-shaped spray surface to continuously flush the sludge being scraped, the sludge to be scraped, and the sludge on the scraper 3, thus accelerating the discharge of sludge.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sludge discharge structure for wastewater treatment, comprising a rotating shaft rotatably disposed within a sludge discharge outlet, a rotating support fixedly connected to the outside of the rotating shaft, a derivative support fixedly connected to the rotating support, and a plurality of scrapers disposed at the bottom of the derivative supports for scraping off sludge adhering to the bottom of the wastewater treatment tank; a walk-through support with its end sliding along the top edge of the wastewater treatment tank is also fixedly connected to the top of the rotating shaft; and a traveling structure that conforms to the wastewater treatment tank and can drive the walk-through support to slide is also fixedly connected to the end of the walk-through support, characterized in that: It also includes a spray assembly mounted on a derivative support and a water supply pipe fixed to a rotating shaft for supplying water to the spray assembly. The spray assembly includes a spray pipe, an adapter connecting the spray pipe and the water supply pipe, and several first spray heads fixed to the spray pipe.

2. The sludge discharge structure for wastewater treatment according to claim 1, characterized in that, The first spray head is positioned facing the bottom surface of the sewage treatment tank in front of the direction of the scraper's movement.

3. The sludge discharge structure for wastewater treatment according to claim 2, characterized in that, It also includes several second spray heads fixed to the spray pipe, with the first spray head and the second spray head arranged in parallel.

4. The sludge discharge structure for wastewater treatment according to claim 3, characterized in that, The second spray head is positioned facing the scraper.

5. A sludge discharge structure for wastewater treatment according to any one of claims 2 to 4, characterized in that, The adapter has a connecting chamber for connecting the spray pipe and the water supply pipe. One side of the adapter has an inlet that connects to the connecting chamber and is used to connect to the water supply pipe, and the other side has a spray outlet that connects to the connecting chamber and is used to connect to the spray pipe.

6. The sludge discharge structure for wastewater treatment according to claim 5, characterized in that, The spray pipe is rotatably connected to the spray outlet, and the adapter is equipped with a swing structure driven by water flow to make the spray pipe swing back and forth.

7. A sludge discharge structure for wastewater treatment according to claim 6, characterized in that, The swing structure includes a partition fixed in the communicating chamber and separating the water inlet and the spray outlet, a drive shaft rotatably connected to the partition, several fan blades fixed to the outer wall of the drive shaft on one side of the water inlet and driven by the water flow, a water outlet opened on the partition and allowing water flow, and a reciprocating swing mechanism fixed between the drive shaft and the spray pipe on the spray outlet side and controlling the swing of the spray pipe.

8. A sludge discharge structure for wastewater treatment according to claim 7, characterized in that, The reciprocating swing mechanism includes a main turntable fixed to the drive shaft, an active lever fixed to the main turntable, a secondary turntable fixed to the spray pipe, and a driven lever slidably connected to the secondary turntable and movable by the active lever. The secondary turntable has an arc-shaped groove for the end of the driven lever to slide inside. Both ends of the driven lever are inclined surfaces facing the same side. The end of the arc-shaped groove has a conical groove for accommodating the end of the driven lever. A first return spring is also provided in the arc-shaped groove for pushing the driven lever out of the conical groove. A reset mechanism for resetting the spray pipe is also provided in the spray outlet.

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