An alkali recovery device for alkali reduction wastewater

Abstract

This utility model discloses an alkali recovery device for alkali reduction wastewater, belonging to the field of purification. It includes an ultrafiltration device for filtering wastewater, comprising a filter tank and several layers of filter screens inside the tank. The bottom surface in front of the filter screens of the filter tank has a drain port, and one side of the top surface of the filter tank has a rectangular discharge port for placing the filter screens. The advantages of this utility model compared to existing technologies are: a comb-shaped vibrating plate is installed behind the filter screen, and a vibration motor is installed on one side of the vibrating plate. The vibration motor drives the vibrating plate to pulse-beat the filter screen, thereby ensuring that the filter screen remains clean when impurities are discharged, preventing mesh blockage. Furthermore, to ensure that the filter screen and vibrating plate are separated when the vibration motor stops, V-shaped spring plates are installed between the sliding blocks on both sides of the filter screen and the vibrating plate.

Description

Technical Field

[0001] This utility model relates to the field of purification, specifically to an alkali recovery device for alkali reduction wastewater. Background Technology

[0002] The alkali reduction wastewater in the dyeing and printing industry has high pH and COD. The alkali concentration in the alkali reduction wastewater is as high as 2%, and the COD is about 20,000 mg / L. Its main organic matter is PTA (terephthalic acid). In order to recycle the alkali in the wastewater, an alkali recovery device for alkali reduction wastewater is usually used to filter the wastewater in multiple layers to ensure the safety of wastewater discharge and the recovery of alkali in the wastewater.

[0003] The existing alkali recovery process for alkali reduction wastewater includes a filtration tank, a filter installed on the feed pipe of the filtration tank, a booster pump installed at the outlet of the filtration tank, and an ultrafiltration device connected to the booster pump via a conveying pipe. Wastewater in the filtration tank is pressurized by the booster pump and then enters the ultrafiltration device for filtration. Waste alkali in the wastewater passes through the ultrafiltration device and flows out with the leachate, while PTA and large organic molecules that cannot pass through the ultrafiltration device are trapped on the other side of the device and flow out with the concentrated water, achieving a separation effect. The ultrafiltration device consists of a filter tank and several layers of filter screens inside the filter tank. To facilitate the discharge of wastewater impurities, a drain port is provided on the bottom front of the filter screens of the filter tank, and a rectangular discharge port for placing the filter screens is provided on one side of the top surface of the filter tank.

[0004] While this filtration method can effectively isolate impurities, some impurities inevitably stick to the filter screen after filtration. These impurities cannot fall into the drain outlet due to gravity, and prolonged adhesion may cause blockage of the mesh. Utility Model Content

[0005] The technical problem this invention aims to solve is that the filter screens of existing alkali recovery devices for alkali reduction wastewater are easily clogged by sludge formed by impurities, and if not cleaned for a long time, the filtration effect is easily reduced.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: an alkali recovery device for alkali reduction wastewater, including an ultrafiltration device for filtering wastewater, the ultrafiltration device including a filter tank and several layers of filter screens located inside the filter tank, the bottom surface in front of the filter screen of the filter tank is provided with a sewage outlet, and a rectangular discharge port for placing the filter screen is provided on one side of the top surface of the filter tank.

[0007] The filter screen is provided with a vibration assembly for vibrating the filter screen behind it. The vibration assembly includes a vibrating plate that is close to the back of the filter screen, a vibration motor that drives the vibrating plate to vibrate, and a vibrating plate bracket welded to the side wall of the filter tank. The vibrating plate has two sliding blocks placed above the vibrating plate bracket, and a V-shaped spring sheet is welded between the sliding block and the side wall of the filter tank. The filter tank is provided with a motor plate for placing the vibration motor.

[0008] As an improvement, the inside of the drain outlet is provided with a threaded sealing cap to seal the drain outlet.

[0009] As an improvement, the mesh size of the filter screen inside the filter canister is gradually reduced, and the inner wall of the filter canister is provided with a groove to control the position of the filter screen.

[0010] As an improvement, the top surface of the filter screen is fixed by a cover plate of a rectangular discharge port.

[0011] As an improvement, the vibrating plate has a comb-shaped structure, and the surface of the vibrating plate is coated with an epoxy anti-corrosion coating.

[0012] As an improvement, the vibration motor is made of 304 stainless steel.

[0013] The advantages of this utility model compared with the prior art are as follows: This device installs a comb-shaped vibrating plate behind the filter screen and a vibration motor on one side of the vibrating plate. The vibration motor drives the vibrating plate to perform pulse-like impacts on the filter screen, thereby ensuring that the filter screen can remain clean when impurities are discharged, avoiding mesh blockage. In order to ensure that the filter screen and the vibrating plate are separated when the vibration motor stops, a V-shaped spring plate is installed between the sliding blocks on both sides of the filter screen and the vibrating plate. Attached Figure Description

[0014] Figure 1 This is a general structural diagram of an alkali recovery device for alkali reduction wastewater according to this utility model.

[0015] Figure 2 This is a cross-sectional view of the overall structure of an alkali recovery device for alkali reduction wastewater according to this utility model.

[0016] Figure 3 This is an open view of the ultrafiltration device of an alkali recovery device for alkali reduction wastewater according to this utility model.

[0017] Figure 4 yes Figure 3 Enlarged view of point A.

[0018] As shown in the figure: 1. Ultrafiltration device; 11. Filter tank; 111. Drain outlet; 112. Rectangular discharge port; 113. Threaded sealing cover; 12. Filter screen; 121. Groove; 2. Vibration assembly; 21. Vibrating plate; 22. Vibration motor; 23. Vibrating plate support; 24. Sliding block; 25. V-shaped spring plate; 26. Motor plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] As per the instruction manual Figure 1 , 2 As shown in Figures 3 and 4, the current alkali reduction wastewater purification process consists of a filtration tank, a filter installed on the feed pipe of the filtration tank, a booster pump installed at the outlet of the filtration tank, and an ultrafiltration device 1 connected to the booster pump via a conveying pipe. The concentration of caustic soda in the liquid alkali wastewater flowing out of the ultrafiltration device 1 is 2-2.5%, and the liquid alkali wastewater is directly sent to the dyeing and printing workshop for reuse. The existing ultrafiltration device 1 includes a filter tank 11 and several layers of filter screens 12 located inside the filter tank 11. The mesh size of the filter screens 12 inside the filter tank 11 gradually decreases. In order to facilitate the fixing of the filter screens 12, the inner wall of the filter tank 11 is provided with a groove 121 for controlling the position of the filter screens 12.

[0021] In order to properly discharge the filtered impurities, the filter tank 11 has a drain port 111 on the bottom front of the filter screen 12, through which the isolated impurities are discharged; in order to facilitate the control of the opening and closing of the drain port 111, the drain port 111 is provided with a threaded sealing cap 113 to seal the drain port 111; in order to facilitate the replacement of the filter screen 12, a rectangular discharge port 112 for placing the filter screen 12 is provided on one side of the top surface of the filter tank 11.

[0022] To facilitate the removal of impurities adhering to the filter screen 12 into the drain outlet 111, a vibration assembly 2 for vibrating the filter screen 12 is provided behind the filter screen 12. The vibration assembly 2 includes a vibration plate 21 closely attached to the back of the filter screen 12, a vibration motor 22 for driving the vibration plate 21 to vibrate, and a vibration plate bracket 23 welded to the side wall of the filter tank 11. The vibration plate 21 is provided with two sliding blocks 24 placed above the vibration plate bracket 23.

[0023] To facilitate the fixing of the vibration motor 22, the filter tank 11 is provided with a motor plate 26 for placing the vibration motor 22. The motor plate 26 is welded to the side wall of the vibration plate bracket 23 and is located below the top surface of the vibration plate bracket 23, thereby ensuring the normal sliding of the sliding block 24.

[0024] To ensure that the vibrating plate 21 and the vibrating motor 22 are not corroded in an alkaline environment, the surface of the vibrating plate 21 is coated with an epoxy anti-corrosion coating, and the vibrating motor 22 is made of 304 stainless steel.

[0025] To avoid the vibrating plate 21 affecting the filtration, the vibrating plate 21 has a comb-shaped structure.

[0026] To ensure that no gaps appear at the contact edges of the filter screen 12 during use, the top surface of the filter screen 12 is fixed by the cover plate of the rectangular discharge port 112.

[0027] In a specific implementation of this invention, the wastewater at the outlet of the filtration pool is connected to the inlet of the filter tank 11 using a booster pump. The wastewater undergoes secondary fine filtration through each layer of filter screens 12. After filtration, the impurities in the wastewater will be filtered in front of the filter screens 12 according to their volume, so that the outlet of the filter tank 11 can discharge recyclable alkaline solution. After filtration, the threaded sealing cap 113 is pulled out, allowing the impurities to flow out of the drain outlet 111. To prevent impurities from sticking together, a vibrating plate 21 is used to beat the filter screens 12 to ensure that the filter screens 12 are clean after filtration.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An alkali recovery device for alkali-reduced wastewater, comprising an ultrafiltration device (1) for filtering wastewater, the ultrafiltration device (1) comprising a filter tank (11) and a plurality of layers of filter screens (12) inside the filter tank (11), a blowdown port (111) being arranged on the bottom surface in front of the filter screens (12) of the filter tank (11), and a rectangular discharge port (112) for placing the filter screens (12) being arranged on one side of the top surface of the filter tank (11), characterized in that: a vibration assembly (2) for vibrating the filter screens (12) is arranged behind the filter screens (12), the vibration assembly (2) comprising a vibration plate (21) closely arranged behind the filter screens (12), a vibration motor (22) for driving the vibration plate (21) to vibrate, and a vibration plate support (23) welded on the side wall of the filter tank (11), two sliding blocks (24) being arranged on the vibration plate (21) and placed above the vibration plate support (23), and V-shaped spring sheets (25) being welded between the sliding blocks (24) and the side wall of the filter tank (11), and a motor plate (26) for placing the vibration motor (22) being arranged inside the filter tank (11). The blowdown port (111) is internally provided with a threaded closure cover (113) for closing the blowdown port (111).

2. An apparatus for recovering alkali from alkali-reduced wastewater according to claim 1, characterized in that: The filter screens (12) inside the filter tank (11) are gradually reduced in mesh size, and the inner wall of the filter tank (11) is provided with grooves (121) for controlling the position of the filter screens (12).

3. The apparatus for recovering alkali from alkali-reduced wastewater according to claim 1, characterized by: The top surface of the filter screens (12) is fixed through the cover plate of the rectangular discharge port (112).

4. The apparatus for recovering alkali from alkali-reduced wastewater according to claim 1, characterized by: The vibration plate (21) is in the form of a comb, and the surface of the vibration plate (21) is coated with epoxy anticorrosive paint.

5. The apparatus for recovering alkali from alkali-reduced wastewater according to claim 1, characterized by: The vibration motor (22) is made of 304 stainless steel.

6. The apparatus for recovering alkali from alkali-reduced wastewater according to claim 1, characterized by: ​

Images