An indigo dye recovery device

Abstract

The utility model relates to indigo dye recovery technical field discloses a kind of indigo dye recovery device, including sediment tank and mixing tank, mixing tank is fixed on the side of sediment tank top and with the inside communication of sediment tank, the inside vertical rotatable installation of mixing tank has rotating rod, rotating rod side is fixed with multiple stirring plate, the top and the lower side of mixing tank are respectively connected with the water inlet pipe and return pipe with its inside communication, the side of sediment tank top that is away from mixing tank is also connected with the water outlet pipe with its inside communication, the rear end surface of sediment tank close to water outlet pipe is connected with overflow pipe.The utility model technical scheme is by separately setting mixing tank in the side of sediment tank top and with its inside communication, when using, wastewater and a part of upper layer water after deposition are pumped into mixing tank, the impact and stirring effect of water flow make flocculating agent fully mix, can make residual active ingredient in upper layer water after deposition again with flocculating agent mixing, ensure that active ingredient is fully flocculated and deposited.

Description

Technical Field

[0001] This utility model relates to the field of indigo dye recovery technology, specifically to an indigo dye recovery device. Background Technology

[0002] Denim warp dyeing uses indigo dye and employs a sizing process. Sizing wastewater has high chroma and COD concentration. Indigo molecules have a stable structure, making it extremely difficult to treat. Due to limitations in the sizing process and the dyeing rate of indigo dye, the amount of indigo dye in the discharged sizing wastewater is considerable. Indigo dye is very expensive, so its recycling would have significant economic and social benefits. Methods for recovering indigo dye from wastewater include precipitation and molecular membrane filtration. Among these, precipitation is the most commonly used method by printing and dyeing plants due to its lower cost.

[0003] In current operations, flocculants need to be added to the wastewater for flocculation before sedimentation. However, this process results in some un-flocculated active ingredients remaining in the upper layer of water after sedimentation, leading to waste. Therefore, we propose an indigo dye recovery device. Utility Model Content

[0004] The purpose of this invention is to provide an indigo dye recovery device. By setting up a separate mixing tank above and on the side of the sedimentation tank and communicating with its interior, wastewater and a portion of the sedimented upper layer water are pumped into the mixing tank during use. The impact and agitation of the water flow ensure that the flocculant is fully mixed, allowing the residual effective components in the sedimented upper layer water to mix with the flocculant again, ensuring that the effective components are fully flocculated and precipitated, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an indigo dye recovery device, comprising a sedimentation tank and a mixing tank, wherein the mixing tank is fixed above the side of the sedimentation tank and communicates with the interior of the sedimentation tank, a rotating rod is vertically rotatably installed inside the mixing tank, multiple stirring plates are fixed on the side of the rotating rod, and the rotating rod is connected to a motor installed on the outer surface of the mixing tank at its end; an inlet pipe and a return pipe communicating with the interior are respectively connected above and below the mixing tank, and an outlet pipe communicating with the interior is also connected above the side of the sedimentation tank away from the mixing tank, and an overflow pipe is connected to the rear surface of the sedimentation tank near the outlet pipe.

[0006] By adopting the above technical solution, the wastewater enters the mixing tank and mixes with the flocculant, then settles in the sedimentation tank. The settled upper layer water is pumped back to the mixing tank and mixed with the flocculant again, ensuring that the effective components in the upper layer water are fully flocculated and settled, reducing the waste of effective components.

[0007] Optionally, the end outlets of both the water inlet pipe and the return water tank are inclined toward the position of the stirring plate.

[0008] By adopting the above technical solution, the wastewater entering and the upper layer water returning to the mixing tank generate an impact effect, which, in conjunction with the stirring plate, has a better stirring and mixing effect.

[0009] Optionally, a partition is vertically fixed inside the sedimentation tank on the side away from the mixing tank, and the overflow pipe is located on the side of the partition away from the outlet pipe.

[0010] By adopting the above technical solution, a secondary sedimentation zone can be formed on the right side of the baffle, allowing the flocculents to settle fully.

[0011] Optionally, the bottom of the sedimentation tank is provided with a mud-drawing pipe that extends to the outside, and the side surface of the mud-drawing pipe is evenly provided with multiple mud-drawing ports that communicate with its interior.

[0012] By adopting the above technical solution, the dye sludge that has settled inside the settling tank can be extracted by the sludge pump through the sludge pumping pipe.

[0013] Optionally, a baffle is fixed vertically inside the connection position between the mixing tank and the sedimentation tank, and the baffles are equidistantly arranged.

[0014] By adopting the above technical solution, the stirring effect in the mixing tank is prevented from being transmitted to the sedimentation tank on the right.

[0015] Optionally, a feeding pipe is connected above the mixing tank between the rotating rod and the water inlet pipe, and the feeding pipe is connected to the inside of the mixing tank.

[0016] By adopting the above technical solution, the flocculant supply pipeline is connected to the feeding pipe, and flocculant can be added into the mixing tank.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0018] 1. The technical solution of this application sets up a mixing tank on the side above the sedimentation tank and connects it to the inside. During use, wastewater and a part of the sedimented upper layer water are pumped into the mixing tank. The impact and agitation of the water flow make the flocculant fully mixed, which allows the residual effective components in the sedimented upper layer water to be mixed with the flocculant again, ensuring that the effective components are fully flocculated and precipitated.

[0019] 2. The technical solution of this application is to tilt the inlet pipe for wastewater entry and the return pipe for upper layer water return to the left, so that the resulting impact and the stirring action of the stirring plate are conducive to the full mixing of flocculant.

[0020] 3. The technical solution of this application reduces the transmission of agitation fluctuations from the mixing tank to the sedimentation tank on the right side by setting multiple vertically equidistant baffles on the right side of the mixing tank, thus enabling normal sedimentation in the sedimentation tank. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the indigo dye recovery device of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the indigo dye recovery device of this utility model;

[0024] Figure 3 This is a schematic diagram of the baffle distribution structure of the indigo dye recovery device of this utility model.

[0025] In the diagram: 1. Sedimentation tank; 11. Baffle plate; 12. Overflow pipe; 13. Water outlet pipe; 2. Mixing tank; 21. Water inlet pipe; 22. Feeding pipe; 23. Water return pipe; 24. Motor; 25. Rotating rod; 251. Stirring plate; 3. Sludge suction pipe; 31. Sludge suction port; 4. Baffle bar. Detailed Implementation

[0026] Please see Figure 1-3 This utility model provides a technical solution: an indigo dye recovery device, including a sedimentation tank 1 and a mixing tank 2. The mixing tank 2 is fixed above the side of the sedimentation tank 1 and communicates with the interior of the sedimentation tank 1. A rotating rod 25 is vertically rotatably installed inside the mixing tank 2. Multiple stirring plates 251 are fixed on the side of the rotating rod 25. A motor 24 is installed on the bottom surface of the mixing tank 2 at the bottom end of the rotating rod 25. The motor 24 is connected to the rotating rod 25 for transmission. A water inlet pipe 21 communicating with the interior of the mixing tank 2 is connected above the mixing tank 2. A feeding pipe 22 is also connected above the mixing tank 2 between the rotating rod 25 and the water inlet pipe 21. The feeding pipe 22 communicates with the interior of the mixing tank 2.

[0027] During use, wastewater enters the mixing tank 2 through the inlet pipe 21, and flocculant enters the mixing tank 2 through the feed pipe 22. The flocculant is injected at the position of the rotating rod 25 on the left side of the wastewater tank. Under the stirring action of the rotating rod 25 and the stirring plate 251, the wastewater and flocculant are mixed. After the flocculation treatment, the wastewater flows to the right and then flows to the right in the sedimentation tank 1, causing the flocculants in it to settle in the sedimentation tank 1, while the upper layer of water flows slowly to the right.

[0028] A water outlet pipe 13, which is connected to the upper side of the sedimentation tank 1 away from the mixing tank 2, is also connected to the interior of the sedimentation tank 1. The upper water will be discharged outward through the water outlet pipe 13.

[0029] A partition 11 is vertically fixed on the side of the sedimentation tank 1 away from the mixing tank 2. This allows the upper water to overflow over the partition 11 and flow to the area on the right side of the partition 11. After settling again in the area on the right side, the water is discharged from the outlet pipe 13, ensuring thorough sedimentation.

[0030] To ensure complete flocculation and sedimentation of the effective components in the upper layer water, an overflow pipe 12 is connected to the rear surface of the sedimentation tank 1 near the outlet pipe 13. The overflow pipe 12 is located on the side away from the partition 11 of the outlet pipe 13, and a return water pipe 23 communicating with the interior of the mixing tank 2 is connected to the bottom of the mixing tank 2. In use, the overflow pipe 12 is connected to a water pump, and the outlet of the water pump is connected to the return water pipe 23, which causes a portion of the upper layer water to flow back into the mixing tank 2 through the return water pipe 23. In the mixing tank 2, it is mixed with the flocculant again to ensure that the effective components are fully flocculated. The end outlets of the inlet pipe 21 and the return water tank are both inclined towards the stirring plate 251, so that the wastewater entering and the upper layer water flowing back into the mixing tank 2 creates an impact effect, which, together with the stirring plate 251, has a better stirring and mixing effect.

[0031] Additionally, vertical baffles 4 are fixed inside the connection between the mixing tank 2 and the sedimentation tank 1. The baffles 4 are equidistantly arranged. The baffles do not prevent wastewater and flocs from entering the sedimentation tank 1 to the right through the gaps between the baffles 4. However, they can prevent the fluctuations during agitation from being transmitted into the sedimentation tank 1, thus avoiding affecting the sedimentation of flocs in the sedimentation tank 1.

[0032] The bottom of the sedimentation tank 1 is provided with a sludge suction pipe 3 that extends to the outside. Multiple sludge suction ports 31 are evenly opened on the side surface of the sludge suction pipe 3 and communicate with its interior. Before use, the sludge suction pipe 3 is connected to the sludge suction pump. When too much dye sludge accumulates, the wastewater is stopped from entering. Then the air pump is started to allow the dye sludge to enter the sludge suction pipe 3 through the sludge suction ports 31 and then be pumped out by the sludge suction pump.

[0033] In use, the inlet pipe 21 is connected to the wastewater supply pipe, the overflow pipe 12 is connected to the water pump and then to the return pipe 23, the feed pipe 22 is connected to the flocculant supply pipe, and the outlet pipe 13 is directly connected to the discharge pipe. The end of the sludge pumping pipe 3 is connected to the sludge pump for standby. The motor 24 is connected to the power supply and started. Wastewater enters the mixing tank 2 from the inlet pipe 21, entering at an angle to the left with an impact force, which agitates the flocculant entering from the feed pipe 22. In conjunction with the rotation of the stirring plate 251 driven by the motor 24, the flocculant and wastewater are fully mixed. The mixture then flows to the right through the baffles into the sedimentation tank 1. During the slow flow to the right, the flocculated sediment slowly settles to the bottom. The water flows from the bottom of sedimentation tank 1 to the right side section through the area above the baffle 11, where it settles again. Finally, it is discharged from the outlet pipe 13. When the upper layer of water flows to the right and approaches the baffle 11, a portion of it is drawn back through the overflow pipe 12 and injected into the mixing tank 2 through the return pipe 23 below. It also enters at an angle to the left, which creates a stirring effect that helps the flocculant to mix fully. This allows the water that has not been completely flocculated and settled to flow back to the mixing tank 2 to ensure sufficient flocculation. When enough indigo dye sludge has settled in sedimentation tank 1, the flow of wastewater and flocculant can be stopped, and the sludge pump can be started to extract the dye sludge through the sludge pump pipe 3 and the sludge pump port 31 on the side for further recycling.

Claims

1. An indigo dye recovery device, comprising a sedimentation tank (1) and a mixing tank (2), characterized in that: The mixing box (2) is fixed above the side of the sedimentation box (1) and communicates with the interior of the sedimentation box (1). A rotating rod (25) is vertically rotatably installed inside the mixing box (2). Multiple stirring plates (251) are fixed on the side of the rotating rod (25). The rotating rod (25) is connected to the motor (24) installed on the outer surface of the mixing box (2) at its end. The mixing tank (2) is connected to an inlet pipe (21) and a return pipe (23) that communicate with its interior, respectively. The sedimentation tank (1) away from the mixing tank (2) is also connected to an outlet pipe (13) that communicates with its interior. The sedimentation tank (1) near the outlet pipe (13) is connected to an overflow pipe (12) on its rear end surface.

2. The indigo dye recovery device according to claim 1, characterized in that: The end outlets of the water inlet pipe (21) and the return water tank are both inclined toward the stirring plate (251).

3. The indigo dye recovery device according to claim 1, characterized in that: A partition (11) is vertically fixed inside the sedimentation tank (1) on the side away from the mixing tank (2), and the overflow pipe (12) is located on the side of the partition (11) away from the outlet pipe (13).

4. The indigo dye recovery device according to claim 1, characterized in that: The bottom of the sedimentation tank (1) is provided with a mud-drawing pipe (3) that extends to the outside. Multiple mud-drawing ports (31) that communicate with the inside of the mud-drawing pipe (3) are evenly opened on the side surface of the mud-drawing pipe (3).

5. The indigo dye recovery device according to claim 1, characterized in that: The mixing tank (2) and the sedimentation tank (1) are connected by vertically fixed baffles (4), which are equidistantly arranged.

6. The indigo dye recovery device according to claim 1, characterized in that: A feeding pipe (22) is connected above the mixing box (2) between the rotating rod (25) and the water inlet pipe (21), and the feeding pipe (22) is connected to the inside of the mixing box (2).

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