Triethylamine hydrochloride wastewater pretreatment device for AKD (Alkyl Ketene Dimer) production

Abstract

The utility model discloses a triethylamine hydrochloride wastewater pretreatment device for AKD (Alkyl Ketene Dimer) production, which comprises a regulating tank, the regulating tank is connected with a reaction tank through a water pump I, the reaction tank is internally provided with a stirring device, a pH (Potential of Hydrogen) regulation dosing system and a desalination reaction agent dosing system, and the other end of the reaction tank is connected with an adsorption tower through a water pump II; compared with the prior art, the triethylamine hydrochloride treatment device has the advantages that the triethylamine hydrochloride is promoted to fully react by combining the pH regulation dosing system, the desalting reaction agent dosing system and the stirring device, so that the triethylamine hydrochloride can be fully treated, and the triethylamine hydrochloride can be fully treated. And by matching with multiple layers of strongly acidic cation exchange resin with gradually varied particle sizes in the adsorption tower, the triethylamine cations are deeply adsorbed, the removal efficiency of the triethylamine hydrochloride is remarkably improved, and two groups of stirring devices in the reaction tank can fully mix the wastewater and the medicament, accelerate the reaction process and improve the treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment devices, specifically to a pretreatment device for triethylamine hydrochloride wastewater from AKD production. Background Technology

[0002] The AKD production process continuously generates large amounts of wastewater containing triethylamine hydrochloride. This wastewater has a complex composition, and if it is discharged directly into the natural environment without effective pretreatment, it will cause a series of serious environmental problems.

[0003] Existing wastewater treatment equipment exhibits numerous shortcomings when dealing with triethylamine hydrochloride wastewater. Traditional treatment methods often have low removal efficiency for triethylamine hydrochloride. Some conventional sedimentation and filtration processes are insufficient to effectively separate triethylamine hydrochloride from wastewater, resulting in treated wastewater still containing high concentrations of triethylamine hydrochloride, failing to meet increasingly stringent environmental emission standards.

[0004] With increasing environmental awareness and increasingly stringent regulations, there is an urgent need for an innovative and efficient pretreatment device for triethylamine hydrochloride wastewater to address the shortcomings of existing technologies. Utility Model Content

[0005] (I) Technical Issues

[0006] This invention provides a pretreatment device for triethylamine hydrochloride wastewater from AKD production, which improves the removal efficiency of triethylamine hydrochloride.

[0007] (II) Technical Content

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a pretreatment device for triethylamine hydrochloride wastewater in AKD production, comprising an equalization tank, an inlet at the bottom of the equalization tank, an overflow outlet at the top, and a liquid level sensor on the side. The equalization tank is connected to a reaction tank via a water pump, and the reaction tank is equipped with a stirring device, a pH adjustment dosing system, and a desalination reaction reagent dosing system. The other end of the reaction tank is connected to an adsorption tower via a water pump, and the adsorption tower is filled with a strong acidic cation exchange resin. The upper end of the adsorption tower is provided with a drain outlet.

[0009] Furthermore, the pH adjustment dosing system and the desalination reaction reagent dosing system have the same structure, and two sets of stirring devices are respectively located directly below the two. The pH adjustment dosing system includes a reagent tank fixed at the top of the reaction tank, and an electromagnetic flow valve is provided at the bottom outlet of the reagent tank.

[0010] Furthermore, the stirring device includes a stirring motor fixedly mounted on the side of the reaction tank, the drive shaft of the stirring motor extending into the interior of the reaction tank and fixedly mounted with a stirring shaft, and a spiral blade fixedly mounted on the stirring shaft.

[0011] Furthermore, an aeration device is provided at the bottom of the regulating tank.

[0012] Furthermore, the inner wall of the reaction tank is provided with an anti-corrosion coating, and a sewage pipe is provided at the bottom of the reaction tank.

[0013] Furthermore, the strong acid cation exchange resin adopts a multi-layered filled structure, and the resin particle size of each layer gradually decreases from bottom to top, with the strongest acid cation exchange resin at the bottom layer having the largest particle size.

[0014] (III) Technical Effects

[0015] Compared with existing technologies, the advantages of this invention are as follows: By combining a pH adjustment dosing system, a desalination reaction reagent dosing system, and a stirring device, the triethylamine hydrochloride is fully reacted. Furthermore, the adsorption tower contains multiple layers of strongly acidic cation exchange resin with gradually varying particle sizes, enabling deep adsorption of triethylamine cations. This significantly improves the removal efficiency of triethylamine hydrochloride, ensuring that wastewater meets discharge standards. Two sets of stirring devices are located directly below the pH adjustment dosing system and the desalination reaction reagent dosing system, respectively, allowing for thorough mixing of wastewater and reagents, accelerating the reaction process, and improving treatment efficiency. The inner wall of the reaction tank is coated with an anti-corrosion layer, effectively resisting corrosion from acidic substances in the wastewater, extending equipment lifespan, and reducing equipment maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 4 This is a top view of the structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of this utility model.

[0021] As shown in the figure: 1. Equalization tank; 2. Inlet; 3. Overflow outlet; 4. Liquid level sensor; 5. Reaction tank; 6. Water pump one; 7. Water pump two; 8. Adsorption tower; 9. Strong acid cation exchange resin; 10. Drain outlet; 11. Stirring motor; 12. Stirring shaft; 13. Spiral blades; 14. Chemical tank; 15. Electromagnetic flow valve; 16. Aeration device; 17. Anti-corrosion coating; 18. Sewage pipe. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Combined with appendix Figure 1 To be continued Figure 2 A pretreatment device for triethylamine hydrochloride wastewater from AKD production includes an equalization tank 1, an inlet 2 at the bottom of the equalization tank 1, an overflow outlet 3 at the top, and a level sensor 4 on the side. An aeration device 16 is provided at the bottom of the equalization tank 1. The equalization tank 1 is connected to a reaction tank 5 via a water pump 6. The inner wall of the reaction tank 5 is coated with an anti-corrosion coating 17. A sewage discharge pipe 18 is provided at the bottom of the reaction tank 5. The reaction tank 5 is equipped with a stirring device, a pH adjustment dosing system, and a desalination reaction reagent dosing system. An adsorption tower 8 is connected to the other end of the reaction tank 5 via a water pump 7. The adsorption tower 8 is filled with a strong acid cation exchange resin 9, and a drain outlet 10 is provided at the top of the adsorption tower 8.

[0026] In this embodiment, as a preferred technical solution, the pH adjustment dosing system and the desalination reaction reagent dosing system have the same structure, and two sets of stirring devices are respectively located directly below them. The pH adjustment dosing system includes a reagent tank 14 fixedly installed at the upper end of the reaction tank 5, and an electromagnetic flow valve 15 is provided at the bottom outlet of the reagent tank 14. The stirring device includes a stirring motor 11 fixedly installed on the side of the reaction tank 5, the drive shaft of the stirring motor 11 extends into the interior of the reaction tank 5 and a stirring shaft 12 is fixedly installed thereon, and a spiral blade 13 is fixedly installed on the stirring shaft 12.

[0027] In this embodiment, as a preferred technical solution, the strong acid cation exchange resin 9 adopts a multi-layer filling structure, and the resin particle size of each layer gradually decreases from bottom to top, with the strongest acid cation exchange resin 9 at the bottom layer having the largest particle size.

[0028] The working principle of this utility model for the pretreatment device of triethylamine hydrochloride wastewater in AKD production is as follows: the device balances the water quality and quantity through an equalization tank and improves the biodegradability of the wastewater through aeration; in the reaction tank, the pH value is adjusted through a dosing system to promote the desalination reaction of triethylamine hydrochloride, and the stirring device accelerates the mixing of the reagent and the wastewater; the multi-layered strongly acidic cation exchange resin with gradually changing particle size in the adsorption tower adsorbs the residual triethylamine cations in the wastewater after the reaction, thereby achieving effective pretreatment of triethylamine hydrochloride wastewater in AKD production.

[0029] The working process of the triethylamine hydrochloride wastewater pretreatment device for AKD production according to this utility model is as follows:

[0030] 1. Wastewater enters the equalization tank: Wastewater containing triethylamine hydrochloride flows into the equalization tank 1 through inlet 2. The function of the equalization tank 1 is to balance the water quality and quantity of the wastewater, providing stable influent conditions for subsequent treatment processes. A level sensor 4 monitors the liquid level in the equalization tank 1 in real time. When the liquid level reaches a certain height, the control system can prepare for subsequent operations or control the influent rate. An aeration device 16 continuously introduces air to the bottom of the equalization tank 1. Its aeration pipes and aeration heads disperse the air into tiny bubbles, which come into full contact with the wastewater as they rise. This prevents solid matter in the wastewater from settling at the bottom of the tank and pre-oxidizes the wastewater, improving its biodegradability and laying the foundation for subsequent treatment. Simultaneously, if the wastewater level is too high, it can overflow through the overflow port 3, ensuring the safe operation of the equalization tank 1.

[0031] 2. From the equalization tank to the reaction tank: When the wastewater in the equalization tank 1 reaches the appropriate treatment conditions, start the water pump 6 to pump the wastewater to the reaction tank 5.

[0032] 3. Treatment within the reaction tank: The pH adjustment and dosing system begins operation. The reagent tank 14 stores acid-base adjusters. When wastewater enters the reaction tank 5, the external controller opens the electromagnetic flow valve 15 based on the measured pH value, controlling the outflow of reagents from the reagent tank 14. Simultaneously, the stirring motor 11, located directly below the pH adjustment and dosing system, starts, driving the stirring shaft 12 and spiral blades 13 to rotate, ensuring rapid and thorough mixing of the added acid-base adjuster with the wastewater, adjusting the pH value to a suitable range for the desalination reaction. The desalination reaction reagent dosing system operates in a similar manner. The reagent tank 14 stores the specific reagents required for the desalination reaction. The electromagnetic flow valve 15 controls the reagent flow, and the stirring device below rapidly agitates the water, promoting full contact between the reagents and the wastewater and facilitating a chemical reaction, converting triethylamine hydrochloride into a substance easily separated and treated later.

[0033] 4. From the reaction tank to the adsorption tower: After the reaction is completed, let it settle. After the sedimentation is complete, open the sewage pipe 18 at the bottom of the reaction tank to discharge the sediment. Then start the water pump 7 to pump the clear wastewater in the reaction tank 5 to the adsorption tower 8.

[0034] 5. Treatment within the adsorption tower: Wastewater enters from the bottom of adsorption tower 8 and flows upward through the area filled with strongly acidic cation exchange resin 9. Because the strongly acidic cation exchange resin 9 employs a multi-layered packing structure with resin particle sizes gradually decreasing from bottom to top, the wastewater first contacts the resin with the largest particle size at the bottom layer, undergoing preliminary adsorption and coarse filtration. As the wastewater rises, it sequentially passes through each layer of resin with gradually decreasing particle size, achieving deep adsorption of impurities such as residual triethylamine cations in the wastewater. Finally, the treated wastewater is discharged from drain outlet 10, achieving the purpose of pretreatment, and can be further treated or discharged.

[0035] 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. A pretreatment device for triethylamine hydrochloride wastewater from AKD production, comprising an equalization tank (1), an inlet (2) at the bottom of the equalization tank (1), an overflow outlet (3) at the top, and a level sensor (4) on the side, characterized in that: The regulating tank (1) is connected to the reaction tank (5) via a water pump (6). The reaction tank (5) is equipped with a stirring device, a pH adjustment dosing system and a desalination reaction agent dosing system. The other end of the reaction tank (5) is connected to the adsorption tower (8) via a water pump (7). The adsorption tower (8) is filled with a strong acid cation exchange resin (9). The upper end of the adsorption tower (8) is equipped with a drain outlet (10).

2. The pretreatment device for triethylamine hydrochloride wastewater from AKD production according to claim 1, characterized in that: The pH adjustment dosing system and the desalination reaction reagent dosing system have the same structure, and two sets of stirring devices are respectively located directly below the two. The pH adjustment dosing system includes a reagent tank (14) fixedly installed at the upper end of the reaction tank (5), and an electromagnetic flow valve (15) is provided at the bottom outlet of the reagent tank (14).

3. The pretreatment device for triethylamine hydrochloride wastewater from AKD production according to claim 2, characterized in that: The stirring device includes a stirring motor (11) fixedly installed on the side of the reaction tank (5). The drive shaft of the stirring motor (11) extends into the interior of the reaction tank (5) and is fixedly provided with a stirring shaft (12). A spiral blade (13) is fixedly provided on the stirring shaft (12).

4. A pretreatment device for triethylamine hydrochloride wastewater from AKD production according to claim 1, characterized in that: The bottom of the regulating tank (1) is equipped with an aeration device (16).

5. A pretreatment device for triethylamine hydrochloride wastewater from AKD production according to claim 1, characterized in that: The inner wall of the reaction tank (5) is provided with an anti-corrosion coating (17), and the bottom of the reaction tank (5) is provided with a sewage pipe (18).

6. A pretreatment device for triethylamine hydrochloride wastewater from AKD production according to claim 1, characterized in that: The strong acid cation exchange resin (9) adopts a multi-layer filling structure, and the resin particle size of each layer gradually decreases from bottom to top, with the strong acid cation exchange resin (9) at the bottom layer having the largest particle size.

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