Air floatation tank for livestock farm wastewater treatment and slag scraper thereof

Abstract

The utility model relates to an air floatation tank for livestock farm wastewater treatment and a slag scraper thereof, which comprise a transmission belt, a driving shaft, a driven shaft, a guide shaft and a semicircular blocking cover, the guide shaft is arranged above the driven shaft, the transmission belt is arranged on the driving shaft, the driven shaft and the guide shaft, and the transmission belt is distributed in an obtuse triangle shape. The conveying belt between the driving shaft and the driven shaft is a horizontal slag scraping section, the conveying belt between the driven shaft and the guide shaft is an inclined conveying section, and the conveying belt between the guide shaft and the driving shaft is an inclined slag removing section; a slag scraping plate is arranged on the surface of the conveying belt, the blocking cover is arranged outside the driving shaft, and the blocking cover and the driven shaft are coaxial; a slag collecting groove is formed below the slag removal section, a vibration block is arranged above the slag removal section, and the vibration block is connected with a driving mechanism for driving the vibration block to beat the slag removal section. According to the utility model, scum adhered to the conveying belt and the scum scraping plate can be removed, the scum is prevented from falling into the air floatation tank again, and the wastewater treatment effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, in particular to an air flotation tank for treating wastewater in a breeding farm and a scraper thereof. Background Art

[0002] The flotation tank is a very common wastewater treatment facility that introduces a large number of microbubbles into the wastewater. The microbubbles gather the suspended matter in the wastewater and drive the suspended matter upward to the liquid surface of the wastewater, and then use a scraper mechanism to remove the scum. The wastewater from the breeding farm contains a large amount of solid impurities such as feces. After preliminary filtration, a large amount of suspended particles will remain, and it contains a large amount of pollutants such as ammonia nitrogen. Therefore, before biochemical treatment, most of the scum and part of the ammonia nitrogen can be removed through flotation treatment, reducing the difficulty of subsequent treatment. The scraper mechanism of the traditional flotation tank generally uses a scraper to scrape off the scum. For details, please refer to CN201710363077.9-A kind of automatic dehydration flotation tank scraper, but the scum is easy to adhere to the scraper and the transmission mechanism. With the operation of the scraper and the transmission mechanism, it is easy to fall into the wastewater again, affecting the treatment effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air flotation tank for treating wastewater in a breeding farm and a scraper thereof, which can remove the scum adhering to the scraper and the transmission mechanism and prevent the scum from re-entering the air flotation tank.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a scraper machine, including a transmission belt, a driving shaft, a driven shaft, a guide shaft and a semicircular baffle, the driving shaft and the driven shaft are at the same height, the guide shaft is arranged above the driven shaft, the transmission belt is installed on the driving shaft, the driven shaft and the guide shaft, and the transmission belt is distributed in an obtuse triangle, the transmission belt between the driving shaft and the driven shaft is a horizontal scraping section, the transmission belt between the driven shaft and the guide shaft is an inclined conveying section, and the transmission belt between the guide shaft and the driving shaft is an inclined slag stripping section; a scraper plate perpendicular to the transmission belt is arranged on the surface of the transmission belt, the baffle is arranged outside the driving shaft, and the baffle is coaxial with the driven shaft, when the scraper plate passes through the baffle, the side of the scraper plate slides with the baffle; a slag collecting trough is arranged below the slag stripping section, a vibration block is arranged above the slag stripping section, and the vibration block is connected to a driving mechanism that drives the vibration block to knock the slag stripping section.

[0005] Furthermore, the driving mechanism is a cylinder.

[0006] Furthermore, flexible brushes are provided at both ends of the scraper plate.

[0007] Furthermore, the bottom wall of the slag collecting trough is arranged at an inclination, and a sewage outlet is arranged at the lower end of the bottom wall of the slag collecting trough, and a detachable plug is arranged in the sewage outlet.

[0008] The flotation tank for treating farm wastewater comprises a tank body, an air supply mechanism is arranged at the bottom of the tank body, the scraper is arranged at the top of the tank body, the slag collecting trough is arranged on the outer wall of the tank body, and the scraper section is located inside the tank body.

[0009] Furthermore, the pool body has a water inlet side wall and a water outlet side wall, a water inlet is arranged at the bottom of the water inlet side wall, a water outlet is arranged on the water outlet side wall, and the water outlet is located below the baffle.

[0010] Furthermore, an L-shaped mesh box is fixedly provided on the side wall of the pool body below the baffle, a quartz sand filter layer is provided in the mesh box, and the water outlet is located in the mesh box.

[0011] Furthermore, the air supply mechanism includes a plurality of microporous aeration disks, and the plurality of microporous aeration disks are connected to an aeration fan through pipelines.

[0012] The beneficial effects of the utility model are as follows: the scraper plate scrapes the scum on the surface of the wastewater to the baffle, and the scum falls onto the conveyor belt after passing through the baffle, and moves to the scum removal section along with the conveyor belt. Since the scum removal section is inclined, most of the scum falls into the scum collecting trough below under the action of gravity, and a small amount of scum adheres to the scraper plate and the conveyor belt. The driving mechanism is used to drive the vibration block to move continuously, so that the vibration block continuously hits the conveyor belt, and the conveyor belt and the scraper plate are vibrated, and the scum adhered to the conveyor belt and the scraper plate can fall into the scum collecting trough. It can be seen that the utility model can remove the scum adhered to the conveyor belt and the scraper plate, prevent the scum from falling into the flotation tank again, and ensure the wastewater treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main view of the scraper of the utility model;

[0014] Figure 2 This is a schematic diagram of the main view of the air flotation tank of the utility model;

[0015] Figure 3 It is a schematic diagram of the scraper plate of the utility model;

[0016] Figure numerals: 1—conveyor belt; 2—driving shaft; 3—driven shaft; 4—guide shaft; 5—shield; 6—scraper plate; 7—slag collecting trough; 8—vibration block; 9—driving mechanism; 10—flexible brush; 11—drain outlet; 20—tank body; 21—water inlet; 22—water outlet; 23—aeration fan; 24—net box; 25—air supply mechanism; 26—quartz sand filter layer. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] The scraper of the utility model is as follows: Figure 1As shown, it includes a conveyor belt 1, a driving shaft 2, a driven shaft 3, a guide shaft 4 and a semicircular shield 5. The driving shaft 2 and the driven shaft 3 are at the same height, the guide shaft 4 is arranged above the driven shaft 3, the conveyor belt 1 is installed on the driving shaft 2, the driven shaft 3 and the guide shaft 4, and the conveyor belt 1 is distributed in an obtuse triangle. The conveyor belt 1 between the driving shaft 2 and the driven shaft 3 is a horizontal scraping section, the conveyor belt 1 between the driven shaft 3 and the guide shaft 4 is an inclined conveying section, and the conveyor belt 1 between the guide shaft 4 and the driving shaft 2 is an inclined slag removal section; the surface of the conveyor belt 1 is provided with a scraping plate 6 perpendicular to the conveyor belt 1, the shield 5 is arranged outside the driving shaft 2, and the shield 5 is coaxial with the driven shaft 3. When the scraping plate 6 passes through the shield 5, the side of the scraping plate 6 slides with the shield 5. The cross section of the shield 5 is semicircular, the center line of the shield 5 is at the same height as the center line of the driven shaft 130, and the opening of the shield 5 faces the driven shaft 130. A slag collecting trough 7 is provided below the slag removing section, and a vibration block 8 is provided above the slag removing section. The vibration block 8 is connected to a driving mechanism 9 for driving the vibration block 8 to knock the slag removing section.

[0019] The driving shaft 2, the driven shaft 3, and the guide shaft 4 are all installed on the frame, and the frame can adopt various existing frame structures. The driving shaft 2 is connected to a driving motor, and the driving shaft 2 can rotate under the drive of the driving motor, thereby driving the conveyor belt 1 to run. There are multiple scraper plates 6, which are evenly distributed. The scraper plates 6 can be made of metal plates or rubber plates. The slag collecting trough 7 is used to collect scum. The scraper plates 6 move with the conveyor belt 1. When the scraper plates 6 move to the scraper section, the scraper plates 6 are in a vertical state, and the lower edge of the scraper plates 6 is at the liquid surface of the wastewater, so that when the scraper plates 6 move, the scum can be scraped and pushed to move toward the direction of the baffle 5. When the scraper plates 6 move to the baffle 5, the scraper plates 6 drive the scum into the baffle 5 and push the scum to move along the circumference of the baffle 5. When the scum moves to the upper edge of the baffle 5, it falls on the conveyor belt 1. The conveyor belt 1 conveys the scum to the scum removal section, and most of the scum falls downward into the scum collecting trough 7 under the action of gravity, and a small amount of scum adheres to the conveyor belt 1 and the scraper plate 6. The driving mechanism 9 drives the vibration block 8 to move back and forth continuously. The movement trajectory of the vibration block 8 is perpendicular to the conveyor belt 1 of the scum removal section, so that the vibration block 8 continuously strikes the conveyor belt 1, so that the scum adhered to the conveyor belt 1 and the scraper plate 6 is vibrated and separated from the conveyor belt 1 and the scraper plate 6.

[0020] In the present invention, the driving mechanism 9 can be a hydraulic cylinder, a linear motor, etc., preferably a pneumatic cylinder.

[0021] like Figure 3As shown, flexible brushes 10 are provided at both ends of the scraper plate 6. The scum near the inner wall of the flotation tank is easy to adhere to the inner wall of the flotation tank. The conventional scraper plate 6 is difficult to scrape off the scum adhered to the side wall of the flotation tank. The utility model provides flexible brushes 10 at both ends of the scraper plate 6. The flexible brushes 10 can fully contact the side wall of the flotation tank. When the scraper plate 6 moves, the flexible brushes 10 can brush off the scum on the side wall of the flotation tank.

[0022] In order to facilitate the cleaning of the slag collecting tank 7, the bottom wall of the slag collecting tank 7 is inclined, and a sewage outlet 11 is provided at the lower end of the bottom wall of the slag collecting tank 7, and a detachable plug is provided in the sewage outlet 11. After the slag in the slag collecting tank 7 is cleaned, there will inevitably be slag residue. At this time, the plug can be pulled out, and the slag collecting tank 7 is rinsed with clean water. The flushing water drives the slag to be discharged from the sewage outlet 11. After the cleaning is completed, the plug is reinstalled.

[0023] The utility model of the air flotation tank for treating farm wastewater is as follows: Figure 2 As shown, the tank body 20 is a rectangular tank body, which can be a concrete tank body or a metal tank body. The bottom of the tank body 20 is provided with an air supply mechanism 25, which is used to provide a large number of micro bubbles. After the micro bubbles enter the bottom of the wastewater, they flow upward, driving the suspended matter in the wastewater to move upward and forming scum on the surface of the wastewater. Figure 1 In the scraper shown, the slag collecting trough 7 is arranged on the outer wall of the pool body 20 , and the scraping section is located inside the pool body 20 .

[0024] The tank body 20 has an inlet side wall and an outlet side wall, a water inlet 21 is provided at the bottom of the inlet side wall, a water outlet 22 is provided on the outlet side wall, and the water outlet 22 is located below the baffle 5. The water outlet 22 is higher than the water inlet 21, and the wastewater enters the bottom of the tank body 20 from the water inlet 21 and then flows upward, prolonging the wastewater retention time so that the suspended matter in the wastewater can be fully separated out under the action of bubbles.

[0025] In order to improve the removal rate of suspended matter, an L-shaped mesh box 24 is fixedly provided on the side wall of the pool body 20 below the shield 5, a quartz sand filter layer 26 is provided in the mesh box 24, and the water outlet 22 is located in the mesh box 24. The wastewater in the pool body 20 must first pass through the quartz sand filter layer 26 before entering the mesh box 24. The quartz sand filter layer 26 can play a filtering role, and the suspended matter in the wastewater stays outside the quartz sand filter layer 26, thereby improving the removal effect of the suspended matter.

[0026] The air supply mechanism 25 of the utility model can be the air supply mechanism used in the existing flotation tank, as long as it can generate a large number of microbubbles. As a preferred embodiment, the air supply mechanism 25 includes a plurality of microporous aeration disks, and the plurality of microporous aeration disks are connected to the aeration fan 23 through a pipeline. The microporous aeration disk is provided with a plurality of micropores with very small apertures. The aeration fan 23 transports external air into the microporous aeration disk, and the air enters the wastewater through the micropores. Since the aperture of the micropores is very small, a large number of microbubbles are formed. The plurality of microporous aeration disks are evenly distributed at the bottom of the tank body 20 to ensure the uniformity of aeration.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Slag scraper, characterized by: The invention comprises a transmission belt (1), a driving shaft (2), a driven shaft (3), a guide shaft (4) and a semicircular baffle (5), wherein the driving shaft (2) and the driven shaft (3) are at the same height, the guide shaft (4) is arranged above the driven shaft (3), the transmission belt (1) is installed on the driving shaft (2), the driven shaft (3) and the guide shaft (4), and the transmission belt (1) is distributed in an obtuse triangle, the transmission belt (1) between the driving shaft (2) and the driven shaft (3) is a horizontal scraping section, the transmission belt (1) between the driven shaft (3) and the guide shaft (4) is an inclined conveying section, and the guide shaft (4) is an inclined conveying section. ) and the driving shaft (2) is an inclined slag-removing section; a scraper plate (6) perpendicular to the conveyor belt (1) is arranged on the surface of the conveyor belt (1); the baffle (5) is arranged outside the driving shaft (2), and the baffle (5) is coaxial with the driven shaft (3); when the scraper plate (6) passes through the baffle (5), the side of the scraper plate (6) and the baffle (5) are slidably matched; a slag collecting groove (7) is arranged below the slag-removing section, and a vibration block (8) is arranged above the slag-removing section, and the vibration block (8) is connected to a driving mechanism (9) for driving the vibration block (8) to knock the slag-removing section.

2. The scraper according to claim 1, characterized in that: The driving mechanism (9) is a cylinder.

3. The scraper according to claim 1, characterized in that: Flexible brushes (10) are provided at both ends of the scraper plate (6).

4. The scraper according to claim 1, characterized in that: The bottom wall of the slag collecting trough (7) is arranged at an inclination, and a sewage outlet (11) is arranged at the lower end of the bottom wall of the slag collecting trough (7), and a detachable plug is arranged in the sewage outlet (11).

5. An air flotation tank for treating farm wastewater, comprising a tank body (20), wherein an air supply mechanism (25) is provided at the bottom of the tank body (20), characterized in that: The scraper according to claim 1 is arranged on the top of the tank body (20), the slag collecting trough (7) is arranged on the outer wall of the tank body (20), and the scraper section is located inside the tank body (20).

6. The air flotation tank for treating farm wastewater according to claim 5, characterized in that: The pool body (20) comprises a water inlet side wall and a water outlet side wall, a water inlet (21) is arranged at the bottom of the water inlet side wall, a water outlet (22) is arranged on the water outlet side wall, and the water outlet (22) is located below the baffle (5).

7. The air flotation tank for treating farm wastewater according to claim 6, characterized in that: An L-shaped net box (24) is fixedly provided on the side wall of the pool body (20) below the baffle (5), a quartz sand filter layer (26) is provided in the net box (24), and the water outlet (22) is located in the net box (24).

8. The air flotation tank for treating farm wastewater according to claim 5, characterized in that: The air supply mechanism (25) comprises a plurality of microporous aeration disks, and the plurality of microporous aeration disks are connected to an aeration fan (23) via pipelines.

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