Wastewater treatment device

Abstract

The utility model relates to a wastewater treatment device which comprises a rack, a neutralizing tank fixed on the rack, a neutralizing pipe fixed at the lower end of the neutralizing tank and a filtering tank fixed on the left side of the neutralizing pipe, and the neutralizing tank which is well designed can realize neutralization of alkali-minimization wastewater by utilizing carbon dioxide, so that the pH value of the wastewater reaches the standard of preliminary recovery. Carbon dioxide can be fully utilized through mutual cooperation of the neutralization tank and the neutralization pipe, and the carbon dioxide is fully contacted with wastewater while the wastewater is pushed to flow out of the filtering tank through air pressure of the carbon dioxide, so that the wastewater neutralization speed is increased, smooth operation of the filtering device is ensured, and the service life of the filtering device is prolonged. The efficient, continuous and stable filtration of the alkali-minimization wastewater can be realized, and the alkali-minimization wastewater is ensured to meet the preliminary recovery requirement.

Description

Technical Field

[0001] This utility model relates to the field of textile wastewater treatment, and in particular to a wastewater treatment device. Background Technology

[0002] In the textile industry, alkali reduction technology is widely used in the treatment of polyester fiber fabrics to improve their hand feel, luster, and wearing performance. However, this process generates a large amount of alkali reduction wastewater. This wastewater is characterized by high alkalinity (pH typically between 12 and 14), high concentration of organic matter (mainly containing terephthalic acid and its esters, which are difficult to degrade), and large fluctuations in water quality and quantity. Direct discharge can cause serious environmental pollution, such as pH imbalance, eutrophication, and toxic effects on aquatic organisms. Existing treatment methods for alkali reduction wastewater include biological treatment, chemical precipitation followed by further treatment, and reuse requirements. However, subsequent treatments all have certain pH requirements. If biological treatment is to be carried out on the alkali reduction wastewater, the pH usually needs to be adjusted to between 6.5 and 8.5. To precipitate heavy metal ions such as copper and zinc from the wastewater, the pH generally needs to be adjusted to around 7-9. If the pretreated alkali-reduced wastewater is to be reused, the pH value usually needs to be adjusted to near neutral, i.e., between 6.5 and 7.5. However, existing wastewater treatment devices still have some shortcomings in controlling the pH value of wastewater. For example, patent CN207046930U discloses a device for adjusting the pH value of wastewater in a wastewater treatment system using beer exhaust gas. This device still has the following shortcomings in the field of wastewater pH adjustment: the utilization rate of carbon dioxide gas is not high enough, and the speed of adjusting the pH value of wastewater is not fast enough. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention aims to provide a wastewater treatment device that solves the problems present in the prior art. Through a carefully designed neutralization tank, it achieves the neutralization of wastewater using carbon dioxide and alkali to reduce its volume, bringing the wastewater pH value to the initial recovery standard. Furthermore, the coordinated operation of the neutralization tank and neutralization pipe ensures the full utilization of carbon dioxide. The pressure of the carbon dioxide propels the wastewater through the filter tank, while simultaneously ensuring sufficient contact between the carbon dioxide and the wastewater, thus increasing the neutralization rate.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wastewater treatment device, comprising a frame, a neutralization tank fixed on the frame, a neutralization pipe fixed at the lower end of the neutralization tank, and a filter tank fixed on the left side of the neutralization pipe;

[0007] The neutralization tank includes an outer shell, a fixing plate fixed to the upper end of the outer shell, a feed inlet fixed to the upper end of the fixing plate, a motor bracket fixed to the upper end of the fixing plate, a motor fixed to the upper end of the motor bracket, a drive shaft fixed to the lower end of the motor, a first stirring blade fixed to the lower end of the drive shaft, an exhaust port fixed to the side of the outer shell, a reaction shell fixed inside the outer shell, an air inlet plate fixed to the lower end of the reaction shell, an air inlet pipe fixed to the lower end of the air inlet plate, a filter plate fixed to the lower end of the outer shell, a first discharge hopper fixed to the lower end of the filter plate, and a discharge port fixed to the lower end of the first discharge hopper.

[0008] Preferably, the neutralization tube includes a feed pipe fixed at the lower end of the discharge port, a drive motor fixed at the right side of the feed pipe, a base fixed at the lower end of the drive motor, a mixing filter pipe fixed at the left side of the feed pipe, and a second stirring blade fixed on the drive motor.

[0009] Preferably, the air inlet plate has a hollow structure, with air outlet holes evenly arranged on the upper part of the air inlet plate, and a funnel-shaped second discharge hopper arranged on the lower part of the air inlet plate.

[0010] Preferably, the air inlet pipe is divided into two sections, including a first air inlet pipe fixed at the lower end of the second discharge hopper and a second air inlet pipe fixed on the side of the first air inlet pipe.

[0011] Preferably, the filter plate has filter holes evenly distributed.

[0012] Preferably, a coarse filter plate is provided inside the side of the mixing filter tube connected to the filter tank.

[0013] (III) Beneficial Effects

[0014] The purpose of this invention is to provide a wastewater treatment device that uses a neutralization tank and a neutralization pipe in combination to fully utilize carbon dioxide. The carbon dioxide pressure propels the wastewater out of the filter tank while ensuring full contact between the carbon dioxide and the wastewater, thus increasing the neutralization rate and ensuring smooth operation of the filtration device. This allows for efficient, continuous, and stable filtration of alkali reduction wastewater, ensuring that the alkali reduction wastewater meets the initial recovery requirements. It is an innovative technology with broad application prospects. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] Figure 2 This is a schematic diagram of the neutralization tank in this utility model.

[0017] Figure 3 This is a schematic diagram of the neutralization tube in this utility model.

[0018] Figure 4 This is a schematic diagram of the air intake plate in this utility model.

[0019] Figure 5 This is a schematic diagram of the air intake pipe in this utility model.

[0020] Figure 6 This is a schematic diagram of the filter plate in this utility model.

[0021] Figure 7 This is a schematic diagram of the filter tube in this utility model.

[0022] In the diagram: 1-Frame, 2-Neutralization tank, 201-Outer shell, 202-Fixing plate, 203-Feed inlet, 204-Motor bracket, 205-Motor, 206-Drive shaft, 207-First stirring blade, 208-Exhaust port, 209-Reaction shell, 210-Air inlet plate, 2101-Air outlet, 2102-Second discharge hopper, 211-Air inlet pipe, 2111-First air inlet pipe, 2112-Second air inlet pipe, 212-Filter plate, 2121-Filter hole, 213-First discharge hopper, 214-Discharge port, 3-Neutralization pipe, 301-Base, 302-Drive motor, 303-Feed pipe, 304-Mixing filter pipe, 3041-Coarse filter plate, 305-Second stirring blade, 4-Filter tank. Detailed Implementation

[0023] The following will refer to the appendix in the example of this utility model. Figure 1 - Appendix Figure 7 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] This utility model provides a technical solution: a wastewater treatment device, including a frame 1, a neutralization tank 2 fixed on the frame 1, a neutralization pipe 3 fixed at the lower end of the neutralization tank 2, and a filter tank 4 fixed to the left side of the neutralization pipe 3. The frame 1 serves as the supporting structure for the entire wastewater treatment device, providing a stable installation foundation for other components such as the neutralization tank 2, the neutralization pipe 3, and the filter tank 4, ensuring the stability of the entire device during operation. The neutralization tank 2 is used to contain wastewater and carbon dioxide, allowing the carbon dioxide to fully react with the wastewater and reduce the pH value of the wastewater. The neutralization pipe 3 receives the wastewater neutralized in the neutralization tank 2, agitates the wastewater to further react with the carbon dioxide, and simultaneously pushes the wastewater towards the filter tank 4, allowing the wastewater to flow through the filter tank 4 under sufficient pressure. The filter tank 4 uses an ultrafiltration (UF) membrane to further filter the wastewater, mainly reducing the COD index in the wastewater, thus completing the preliminary treatment of the alkali-reduction wastewater.

[0025] Neutralization tank 2 includes an outer shell 201, a fixing plate 202 fixed to the upper end of the outer shell 201, a feed inlet 203 fixed to the upper end of the fixing plate 202, a motor bracket 204 fixed to the upper end of the fixing plate 202, a motor 205 fixed to the upper end of the motor bracket 204, a drive shaft 206 fixed to the lower end of the motor 205, a first stirring blade 207 fixed to the lower end of the drive shaft 206, an exhaust port 208 fixed to the side of the outer shell 201, a reaction shell 209 fixed inside the outer shell 201, and a [missing information - likely a device or structure] fixed to the reaction shell 20. The system includes an air inlet plate 210 at the lower end, an air inlet pipe 211 fixed to the lower end of the air inlet plate 210, a filter plate 212 fixed to the lower end of the outer casing 201, a first discharge hopper 213 fixed to the lower end of the filter plate 212, and a discharge port 214 fixed to the lower end of the first discharge hopper 213. The outer casing 201 protects the internal components, forming a relatively closed reaction space to prevent wastewater and other substances from overflowing during the reaction. It also provides sound insulation and heat insulation to a certain extent, reducing interference from external factors on the internal reaction. The fixing plate 202 provides a fixed installation position for components such as the feed inlet 203 and the motor bracket 204, allowing these components to be securely connected to the upper end of the neutralization tank 2. It also works with the outer casing 201 to prevent gas leakage. The feed inlet 203 is the inlet for wastewater to enter the neutralization tank 2, facilitating the introduction of wastewater into the neutralization tank 2 for subsequent treatment reactions. It is directly connected to a water pipe and sealed to prevent carbon dioxide leakage. The motor bracket 204 is used to fix the motor 205, providing stable support for the motor 205 and ensuring that the motor 205 will not shift due to vibration or other reasons during operation, thereby ensuring stable and reliable driving of the stirring blades through the transmission shaft 206. The motor 205 provides power for the stirring process, driving the transmission shaft 206 to rotate, which in turn drives the first stirring blade 207 to stir the wastewater in the reaction shell 209, so that the wastewater and the added neutralizing agent and other substances are fully mixed, accelerating the neutralization reaction. The transmission shaft 206 connects the motor 205 and the first stirring blade 207, transmitting the power of the motor 205 to the first stirring blade 207 to realize the rotation of the stirring blade, thereby completing the stirring and mixing function of the wastewater. Driven by the motor 205 and the transmission shaft 206, the first stirring blade 207 stirs the wastewater in the reaction shell 209, so that the wastewater and the neutralizing agent and other substances are fully contacted and mixed evenly, improving the efficiency of the neutralization reaction and ensuring that the acidity, alkalinity and other indicators of the wastewater can reach the treatment requirements as soon as possible. The exhaust port 208 is used for pressure relief when the pressure inside the tank is too high. The reaction shell 209 is the main site for the neutralization reaction of wastewater. Its internal space allows for thorough mixing and chemical reaction of wastewater with neutralizing agents and other substances. Its design can be optimized according to specific reaction requirements to improve reaction efficiency. During the reaction, packing material is placed inside the reaction shell 209. Wastewater forms a liquid film on the surface of the packing material, and carbon dioxide comes into full contact with the liquid film as it rises. This method greatly increases the gas-liquid contact area. The air inlet plate 210 provides a channel for gas input to the neutralization reaction.The inlet pipe 211 serves as the gas delivery channel into the neutralization tank 2, ensuring sufficient gas can enter the inlet plate 210 to participate in the neutralization reaction. The filter plate 212 performs preliminary filtration of the wastewater after the neutralization reaction, making the outflowing wastewater relatively purer and providing relatively high-quality influent for subsequent treatment processes. The first discharge hopper 213 collects the wastewater filtered by the filter plate 212 and guides the wastewater downwards to the discharge port 214, serving as a transition and flow guide. The discharge port 214 is the outlet for the treated wastewater in the neutralization tank 2, transporting the wastewater that has undergone the neutralization reaction and preliminary filtration to the neutralization pipe 3 for further treatment.

[0026] The neutralization pipe 3 includes an inlet pipe 303 fixed to the lower end of the outlet 214, a drive motor 302 fixed to the right side of the inlet pipe 303, a base 301 fixed to the lower end of the drive motor 302, a mixing and filtering pipe 304 fixed to the left side of the inlet pipe 303, and a second stirring blade 305 fixed to the drive motor 302. The base 301 is used to fix the drive motor 302, providing stable support for the drive motor 302 and ensuring that the motor 302 will not shake or shift during operation, thereby ensuring stable and reliable driving of the second stirring blade 305. The drive motor 302 provides power for the stirring operation inside the neutralization pipe 3, driving the second stirring blade 305 to rotate, so that the wastewater entering the neutralization pipe 3 is fully mixed with carbon dioxide again, further optimizing the wastewater treatment effect. The inlet pipe 303 connects the outlet 214 of the neutralization tank 2 and the inside of the neutralization pipe 3, and is responsible for introducing the wastewater flowing out of the neutralization tank 2 into the neutralization pipe 3 for further treatment operations inside the neutralization pipe 3. The mixing filter tube 304 serves two purposes: firstly, it mixes and stirs the incoming wastewater with carbon dioxide; secondly, the coarse filter plate 3041 connected to the filter tank 4 provides preliminary coarse filtration of the wastewater, intercepting relatively large impurity particles and reducing the burden on the subsequent fine filtration in the filter tank 4. Driven by the drive motor 302, the stirring blades 305 agitate the wastewater in the neutralization tube 3, ensuring thorough mixing of the wastewater and carbon dioxide and further improving the wastewater treatment quality.

[0027] The air inlet plate 210 has a hollow structure. The upper part of the air inlet plate 210 is uniformly provided with air outlet holes 2101, and the lower part of the air inlet plate 210 is provided with a funnel-shaped second discharge hopper 2102. The hollow structure and the uniformly provided air outlet holes 2101 at the top can make the gas introduced evenly dispersed into the wastewater in the reaction shell 209, which helps to improve the reaction efficiency. The funnel-shaped second discharge hopper 2102 at the bottom facilitates the smooth downward flow of the wastewater after gas treatment.

[0028] The air inlet pipe 211 is divided into two sections, including a first air inlet pipe 2111 fixed at the lower end of the second discharge hopper and a second air inlet pipe 2112 fixed on the side of the first air inlet pipe 2111; together, the first air inlet pipe 2111 fixed at the lower end of the second discharge hopper and the second air inlet pipe 2112 fixed on the side of the first air inlet pipe 2111 are responsible for conveying external gas to the air inlet plate 210, and at the same time, the wastewater after reacting with carbon dioxide passes through the first air inlet pipe 2111 to the filter plate 212 for filtration.

[0029] The filter plate 212 is uniformly provided with filter holes 2121; the uniformly provided filter holes 2121 can intercept larger solid particles and impurities in the wastewater, such as mud, sand, and undissolved large lumps, to prevent these impurities from entering the subsequent neutralization pipe 3 and other components, causing blockage or affecting the subsequent treatment effect.

[0030] A coarse filter plate 3041 is installed inside the side of the mixing filter tube 304 connected to the filter tank 4. The coarse filter plate 3041 can remove some larger impurities in the wastewater, such as some incompletely dissolved drug particles and larger suspended solids, so that the impurity content of the wastewater entering the filter tank 4 is relatively reduced, which is beneficial to improving the filtration efficiency and service life of the filter tank 4.

[0031] Working principle:

[0032] First, the alkali reduction wastewater is introduced into the reaction shell 209 through the feed inlet 203. Carbon dioxide is introduced into the air inlet plate 210 through the air inlet pipe 211. The motor 205 drives the first stirring blade 207 to rotate, stirring the carbon dioxide and wastewater to ensure a full reaction. After the reaction is completed, the wastewater is filtered through the air inlet plate 210 and the filter plate 212 and enters the feed pipe 303. Excess carbon dioxide passes through the upper end of the reaction shell 209 and enters the interlayer between the outer shell 201 and the reaction shell 209. When the wastewater passes through the filter plate 212, it continues to react with the wastewater and also enters the feed pipe 303. The second stirring blade 305 in the feed pipe 303 stirs the wastewater and carbon dioxide to continue reacting and pushes the wastewater and carbon dioxide towards the filter tank 4. The wastewater completes the initial filtration after passing through the filter tank 4.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device, characterized in that, Includes a frame (1), a neutralization tank (2) fixed on the frame (1), a neutralization pipe (3) fixed at the lower end of the neutralization tank (2), and a filter tank (4) fixed on the left side of the neutralization pipe (3); The neutralization tank (2) includes an outer shell (201), a fixing plate (202) fixed to the upper end of the outer shell (201), a feed inlet (203) fixed to the upper end of the fixing plate (202), a motor bracket (204) fixed to the upper end of the fixing plate (202), a motor (205) fixed to the upper end of the motor bracket (204), a drive shaft (206) fixed to the lower end of the motor (205), a first stirring blade (207) fixed to the lower end of the drive shaft (206), and a fixed... The exhaust port (208) on the side of the outer shell (201), the reaction shell (209) fixed inside the outer shell (201), the air inlet plate (210) fixed at the lower end of the reaction shell (209), the air inlet pipe (211) fixed at the lower end of the air inlet plate (210), the filter plate (212) fixed at the lower end of the outer shell (201), the first discharge hopper (213) fixed at the lower end of the filter plate (212), and the discharge port (214) fixed at the lower end of the first discharge hopper (213).

2. The wastewater treatment device according to claim 1, characterized in that, The neutralization tube (3) includes a feed tube (303) fixed at the lower end of the outlet (214), a drive motor (302) fixed on the right side of the feed tube (303), a base (301) fixed at the lower end of the drive motor (302), a mixing filter tube (304) fixed on the left side of the feed tube (303), and a second stirring blade (305) fixed on the drive motor (302).

3. The wastewater treatment device according to claim 1, characterized in that, The air inlet plate (210) has a hollow structure. Air outlet holes (2101) are evenly arranged on the upper part of the air inlet plate (210), and a funnel-shaped second discharge hopper (2102) is arranged on the lower part of the air inlet plate (210).

4. The wastewater treatment device according to claim 1, characterized in that, The air inlet pipe (211) is divided into two sections, including a first air inlet pipe (2111) fixed at the lower end of the second discharge hopper and a second air inlet pipe (2112) fixed on the side of the first air inlet pipe (2111).

5. The wastewater treatment device according to claim 1, characterized in that, The filter plate (212) is provided with filter holes (2121) evenly distributed.

6. The wastewater treatment device according to claim 2, characterized in that, The mixing filter tube (304) is connected to the filter tank (4) on one side, and a coarse filter plate (3041) is provided inside.

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