Wastewater treatment device for butyl acetate production

Abstract

The embodiment of the invention relates to the technical field of wastewater treatment, and provides a wastewater treatment device for butyl acetate production, the wastewater treatment device comprises a wastewater treatment cylinder, a special-shaped material mixing partition plate, a secondary partition plate and a hopper-shaped residue filtering cover, the upper end and the lower end of the wastewater treatment cylinder are detachably provided with an upper end cover and a lower end base in a sealed mode respectively, a power mixing mechanism is arranged on the upper end cover, a filling mechanism is arranged on the lower portion of the wastewater treatment barrel, the special-shaped mixing partition plate is arranged in the wastewater treatment barrel in a sealed mode, a concave mixing groove is formed in the upper portion of the special-shaped mixing partition plate, and a plurality of drainage grooves distributed at equal angles are formed in the lower portion of the special-shaped mixing partition plate. By means of the technical scheme, the problems that in the prior art, when a wastewater treatment device for butyl acetate production is used for extracting wastewater, blockage is prone to occurring, and the cleaning difficulty is large are solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of wastewater treatment, and more particularly, to a wastewater treatment device for butyl acetate production. Background Art

[0002] In the field of chemical production, butyl acetate, as an important organic solvent, is widely used in industries such as coatings, inks, and adhesives.

[0003] However, during the production process of butyl acetate, a large amount of high-concentration organic wastewater containing pollutants such as butyl acetate, residual acid, and alcohols is generated. Therefore, a wastewater treatment device for butyl acetate production has emerged. Its main function is to remove pollutants in the wastewater through physical, chemical, or biological methods to achieve the up-to-standard discharge or reuse of the wastewater, and at the same time, recover valuable substances as much as possible to reduce production costs. Currently, common wastewater treatment devices for butyl acetate production mostly adopt an extraction - rectification - flash evaporation combined process. Such devices usually consist of a wastewater collection tank, a regulating tank, an extraction tower, a rectification tower, a flash evaporator, a condenser, a phase separator, as well as pumps and pipeline systems.

[0004] Among them, the extraction tower, as the core equipment, generally adopts a packed tower or a plate tower structure, and realizes the preliminary separation of butyl acetate by contacting and mixing with an extractant (such as butyl ether).

[0005] However, the extraction tower adopted by the existing wastewater treatment device for butyl acetate production, during the actual operation process, when the wastewater contains solid impurities or high-concentration polymers, not only is it easy to cause blockage problems in the packing or trays inside the extraction tower, resulting in a decrease in mass transfer efficiency and affecting the extraction effect, but also frequent cleaning and maintenance are required, and there are problems of large cleaning difficulty and high cost. Summary of the Invention

[0006] To overcome the above defects, embodiments of the present disclosure provide a wastewater treatment device for butyl acetate production to solve the problem in the background art that the existing wastewater treatment device for butyl acetate production is prone to blockage and has a large cleaning difficulty during the extraction operation of wastewater.

[0007] According to one aspect, at least one embodiment of the present disclosure provides a wastewater treatment device for butyl acetate production, including a wastewater treatment cylinder, a special-shaped mixing and separating plate, a secondary separating plate, and a funnel-shaped slag cover; The upper and lower ends of the wastewater treatment cylinder are respectively provided with an upper end cover and a lower end seat in a sealed and detachable manner. A power mixing mechanism is provided on the upper end cover, and a packing mechanism is provided at the lower part of the wastewater treatment cylinder; The special-shaped mixing and separating plate is hermetically arranged in the wastewater treatment cylinder. An inverted U-shaped mixing tank is provided at the upper part of the special-shaped mixing and separating plate, and a plurality of water discharge grooves are provided at equal angles at the lower part; The secondary separating plate is hermetically arranged in the wastewater treatment cylinder and is located below the special-shaped mixing and separating plate. A plurality of water discharge elbows are arranged through the secondary separating plate at equal angles. The water discharge elbows correspond to the water discharge grooves one by one. One end of the water discharge elbow extends into the water discharge groove. A plurality of liquid infusion pipes are arranged through the inverted U-shaped mixing tank. The top end of the water discharge elbow is higher than the bottom end of the liquid infusion pipe; The hopper-shaped slag filter cover is hermetically and rotatably arranged in the wastewater treatment cylinder. The hopper-shaped slag filter cover is located between the secondary separating plate and the filling mechanism. The hopper-shaped slag filter cover is connected to the power mixing mechanism. A slag discharging mechanism capable of discharging impurities in the hopper-shaped slag filter cover is arranged on one side of the wastewater treatment cylinder.

[0008] As a preferred technical solution of the present disclosure, the power mixing mechanism includes a mixing rotating rod, a mixing motor and a mixing blade group; The mixing rotating rod penetrates and is rotatably arranged on the special-shaped mixing and separating plate and the secondary separating plate. One end of the mixing rotating rod is connected to one end of the hopper-shaped slag filter cover; The mixing motor is installed on the upper end cover. The output end of the mixing motor is connected to one end of the mixing rotating rod; There are multiple mixing blade groups. The mixing blade groups are arranged on the mixing rotating rod. The multiple mixing blade groups are respectively arranged between the special-shaped mixing and separating plate and the upper end cover and between the special-shaped mixing and separating plate and the secondary separating plate.

[0009] On the basis of the foregoing solution, a liquid inlet pipe group capable of adding wastewater and extractant is provided on one side of the upper end cover; The liquid inlet pipe group includes a water inlet elbow and an additive pipe; The water inlet elbow penetrates and is arranged on one side of the upper end cover; The additive pipe penetrates and is arranged at the bent part of the water inlet elbow. A one-way valve is installed on the additive pipe.

[0010] On the basis of the foregoing solution, further, the slag discharging mechanism includes a slag discharging pipe and a slag scraping plate; The slag discharging pipe is communicatively arranged on one side of the wastewater treatment cylinder. The bottom of the slag discharging pipe is flush with the top of the hopper-shaped slag filter cover; The slag scraping plate is arranged in the wastewater treatment cylinder. The bottom of the slag scraping plate is in contact with the inner wall of the hopper-shaped slag filter cover. One end of the slag scraping plate is located on one side of the slag discharging pipe.

[0011] Further based on the foregoing solution, the packing mechanism includes a packing frame and a sector-shaped packing box; The packing frame is arranged on the wastewater treatment cylinder, and a number of packing through-holes are equiangularly formed around the packing frame; A number of the sector-shaped packing boxes are provided, and the sector-shaped packing boxes correspond to the packing through-holes one by one. The sector-shaped packing boxes are hermetically and detachably arranged in the packing through-holes, and multiple layers of filtering packing are arranged in the sector-shaped packing boxes.

[0012] Further based on the foregoing solution, a liquid discharge pipe group is further arranged in the wastewater treatment cylinder, and the liquid discharge pipe group is located below the packing mechanism; The liquid discharge pipe group includes a liquid discharge hopper and a liquid discharge elbow; The liquid discharge hopper is hermetically arranged in the wastewater treatment cylinder, and the liquid discharge hopper is located below the packing mechanism; One end of the liquid discharge elbow is communicated and arranged at the bottom of the liquid discharge hopper, and the other end penetrates to one side of the wastewater treatment cylinder.

[0013] In order to further mix the wastewater and the extractant in the concave mixing tank and improve the stability of the wastewater during purification, an air inlet pressure regulating pipe and an exhaust pipe are communicated with the upper end cover. One end of the air inlet pressure regulating pipe penetrates into the concave mixing tank, and the air inlet pressure regulating pipe corresponds to the water inlet elbow.

[0014] Further based on the foregoing solution, a pressure sensor capable of detecting the pressure in the concave mixing tank is arranged on the upper end cover.

[0015] The beneficial effects of the embodiments of the present disclosure are as follows: In the present disclosure, through the arrangement of the liquid inlet pipe group, the wastewater and the extractant can enter the special-shaped mixing partition plate in the wastewater treatment cylinder synchronously. By starting the mixing motor to drive the mixing blade group to rotate, the wastewater and the extractant can be preliminarily mixed. When the preliminarily mixed wastewater enters above the secondary partition plate through the liquid delivery pipe, it is discharged by turning back upward through the water outlet elbow. During the process of the wastewater turning back, the collision between the water flows can not only perform secondary mixing, but also the rotation of the mixing blade group can accelerate the impact between the water flows to realize the secondary mixing of the wastewater. When the wastewater falls to the funnel-shaped slag filter cover after being mixed with the extractant, the large-particle impurities can be removed through the funnel-shaped slag filter cover. Then the wastewater enters the packing mechanism and is deeply filtered by multiple layers of filtering packing, and finally the treated clean water is discharged through the liquid discharge pipe group.

[0016] Compared with the existing equipment, through the synergistic effect of the special-shaped mixing partition plate, the secondary partition plate and the power mixing mechanism, the present device forms multi-stage mixing, the wastewater and the extractant are more fully mixed, the extraction reaction efficiency is greatly improved, the pollutant removal effect is better, and the bucket-shaped filter residue cover cooperates with the impurity removal mechanism, and impurities can be discharged through the slag scraping plate and the impurity removal pipe during the operation of the equipment, avoiding blockage, greatly prolonging the service life of the filter packing, and ensuring the continuous and stable treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0018] Figure 1 FIG. is a schematic structural diagram of an overall wastewater treatment device for butyl acetate production in an embodiment of the present disclosure; Figure 2 FIG. is a schematic structural diagram of a partial cross-section of a wastewater treatment device for butyl acetate production in an embodiment of the present disclosure; Figure 3 For the present disclosure Figure 2 FIG. is a schematic enlarged partial structural diagram at A in the present disclosure; Figure 4 For the present disclosure Figure 2 FIG. is a schematic enlarged partial structural diagram at B in the present disclosure; Figure 5 FIG. is a schematic structural diagram of a packing mechanism in an embodiment of the present disclosure; Figure 6 FIG. is a schematic structural diagram of the cooperation of a special-shaped mixing partition plate, a secondary partition plate, a downward water bend pipe and an infusion pipe in an embodiment of the present disclosure; Figure 7 FIG. is a schematic structural diagram of the cooperation of a power mixing mechanism, an impurity removal mechanism, a special-shaped mixing partition plate, a secondary partition plate and a bucket-shaped filter residue cover in an embodiment of the present disclosure.

[0019] In the figure: 001, power mixing mechanism; 002, packing mechanism; 003, impurity removal mechanism; 004, liquid inlet pipe group; 005, liquid discharge pipe group; 1. Wastewater treatment cylinder; 2. Upper end cover; 3. Lower seat; 4. Special-shaped mixing and separating plate; 5. Secondary separating plate; 6. Sewer elbow; 7. Infusion tube; 8. Hopper-shaped slag filter cover; 9. Mixing rotating rod; 10. Mixing motor; 11. Mixing blade group; 12. Water inlet elbow; 13. Additive tube; 14. Check valve; 15. Waste discharge pipe; 16. Scraper; 17. Packing rack; 18. Sector-shaped packing box; 19. Filter packing; 20. Drain hopper; 21. Drain elbow; 22. Air inlet pressure regulating pipe; 23. Exhaust pipe; 24. Pressure sensor. Detailed implementation manners

[0020] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.

[0021] To make the drawings concise, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0022] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0023] In the present disclosure, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is at a lower horizontal height than the second feature.

[0024] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure.

[0025] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0026] As Figures 1 to 7 shown, it shows a wastewater treatment device for butyl acetate production in an embodiment of the present disclosure, which includes a wastewater treatment cylinder 1, a special-shaped mixing partition plate 4, a secondary partition plate 5, and a hopper-shaped filter residue cover 8.

[0027] As described above, upper end covers 2 and lower end seats 3 are respectively sealed and detachably arranged at the upper and lower ends of the wastewater treatment cylinder 1. A power mixing mechanism 001 is provided on the upper end cover 2, and a packing mechanism 002 is provided at the lower part of the wastewater treatment cylinder 1.

[0028] As described above, a liquid inlet pipe group 004 capable of adding wastewater and extractant is provided on one side of the upper end cover 2. The liquid inlet pipe group 004 includes a water inlet elbow 12 and an additive pipe 13. The water inlet elbow 12 is arranged through one side of the upper end cover 2, and the additive pipe 13 is arranged through the bent part of the water inlet elbow 12. A one-way valve 14 is installed on the additive pipe 13.

[0029] Specifically, when adding wastewater, the wastewater can be added through one end of the water inlet elbow 12, and the extractant can be injected into the wastewater treatment cylinder 1 through one end of the additive pipe 13 at the same time, so that the wastewater and the extractant can be synchronously transported in equal proportion, and the wastewater and the extractant can be fully mixed.

[0030] Among them, the special-shaped mixing partition plate 4 is hermetically arranged in the wastewater treatment cylinder 1. An concave mixing groove is provided on the upper part of the special-shaped mixing partition plate 4, and a plurality of water outlet grooves are provided at equal angles on the lower part. The secondary partition plate 5 is hermetically arranged in the wastewater treatment cylinder 1 and is located below the special-shaped mixing partition plate 4. A plurality of water outlet elbows 6 are arranged through the secondary partition plate 5 at equal angles. The water outlet elbows 6 correspond to the water outlet grooves one by one. One end of the water outlet elbow 6 extends into the water outlet groove. A plurality of liquid delivery pipes 7 are arranged through the concave mixing groove. The top end of the water outlet elbow 6 is higher than the bottom end of the liquid delivery pipe 7.

[0031] As described above, the power mixing mechanism 001 includes a mixing rotating rod 9, a mixing motor 10, and a mixing blade group 11. The mixing rotating rod 9 penetrates and is rotatably arranged on the special-shaped mixing partition plate 4 and the secondary partition plate 5. One end of the mixing rotating rod 9 is connected to one end of the funnel-shaped slag filter cover 8. The mixing motor 10 is installed on the upper end cover 2, and the output end of the mixing motor 10 is connected to one end of the mixing rotating rod 9. There are multiple mixing blade groups 11, and the mixing blade groups 11 are arranged on the mixing rotating rod 9. The multiple mixing blade groups 11 are respectively arranged between the special-shaped mixing partition plate 4 and the upper end cover 2, and between the special-shaped mixing partition plate 4 and the secondary partition plate 5.

[0032] Specifically, when the mixing motor 10 is started, the output end of the mixing motor 10 drives the mixing rotating rod 9 to rotate. The rotation of the mixing rotating rod 9 can drive several mixing blade groups 11 and the funnel-shaped filter cover to rotate. After the wastewater and the extractant enter the special-shaped mixing partition plate 4 in the wastewater treatment cylinder 1 synchronously, through the rotation of the mixing blade group 11, the wastewater and the extractant can be preliminarily mixed. When the preliminarily mixed wastewater enters above the secondary partition plate 5 through the infusion pipe 7, it is discharged through the upward return through the downward water pipe 6. During the return process of the wastewater, the collision between the water flows can not only perform secondary mixing, but also accelerate the impact between the water flows through the rotation of the mixing blade group 11, realizing the secondary mixing of the wastewater. This unique design effectively avoids the direct downward flow of the wastewater that has not been fully mixed and reacted, enables the wastewater to have a longer residence time and more opportunities for mixing and reaction in the device, ensures the integrity and effectiveness of wastewater treatment, and helps to improve the overall treatment quality. After the wastewater is mixed with the extractant, it falls into the funnel-shaped slag filter cover 8 through the downward water pipe 6.

[0033] As described above, the funnel-shaped slag filter cover 8 is sealed and rotatably arranged in the wastewater treatment cylinder 1. The funnel-shaped slag filter cover 8 is located between the secondary partition plate 5 and the packing mechanism 002. The funnel-shaped slag filter cover 8 is connected to the power mixing mechanism 001. A waste discharging mechanism 003 capable of discharging impurities in the funnel-shaped slag filter cover 8 is arranged on one side of the wastewater treatment cylinder 1. The waste discharging mechanism 003 includes a waste discharging pipe 15 and a slag scraping plate 16. The waste discharging pipe 15 is communicatively arranged on one side of the wastewater treatment cylinder 1, and the bottom of the waste discharging pipe 15 is flush with the top of the funnel-shaped slag filter cover 8. The slag scraping plate 16 is arranged in the wastewater treatment cylinder 1, the bottom of the slag scraping plate 16 is in contact with the inner wall of the funnel-shaped slag filter cover 8, and one end of the slag scraping plate 16 is located on one side of the waste discharging pipe 15.

[0034] Specifically, after the wastewater falls into the funnel-shaped slag filter cover 8 through the drain bend 6, the funnel-shaped slag filter cover 8 can block and filter impurities or high-concentration polymers in the wastewater. After the preliminary filtration of the wastewater, the impurities will fall into the funnel-shaped slag filter cover 8. When the funnel-shaped slag filter cover 8 rotates, under the action of centrifugal force and the slag scraping plate 16, the impurities will be scraped by the slag scraping plate 16 and conveyed into the impurity discharge pipe 15, so that the impurities are discharged from the wastewater treatment cylinder 1, and it can effectively prevent the funnel-shaped slag filter cover 8 from being blocked.

[0035] As described above, the packing mechanism 002 includes a packing rack 17 and a fan-shaped packing box 18. The packing rack 17 is arranged on the wastewater treatment cylinder 1. A number of packing through holes are equiangularly formed around the packing rack 17. There are a number of fan-shaped packing boxes 18. The fan-shaped packing boxes 18 correspond to the packing through holes one by one. The fan-shaped packing boxes 18 are hermetically and detachably arranged in the packing through holes, and multiple layers of filtering packing 19 are arranged in the fan-shaped packing boxes 18.

[0036] Specifically, the packing mechanism 002 adopts the combination form of the packing rack 17 and the fan-shaped packing box 18. The fan-shaped packing box 18 is detachably arranged in the packing through hole of the packing rack 17, and multiple layers of filtering packing 19 are arranged inside. This design makes the replacement and maintenance of the filtering packing 19 extremely convenient. Different types and specifications of filtering packing 19 can be flexibly selected according to the actual needs of wastewater treatment to meet the treatment requirements of different water qualities. At the same time, the multiple layers of filtering packing 19 can deeply filter the wastewater after the extraction reaction, further remove residual impurities and pollutants, effectively improve the water quality of the effluent, and ensure that the treated wastewater meets the discharge standard or the reuse requirement.

[0037] As described above, a liquid discharge pipe group 005 is also arranged in the wastewater treatment cylinder 1. The liquid discharge pipe group 005 is located below the packing mechanism 002. The liquid discharge pipe group 005 includes a liquid discharge hopper 20 and a liquid discharge bend pipe 21. The liquid discharge hopper 20 is hermetically arranged in the wastewater treatment cylinder 1. The liquid discharge hopper 20 is located below the packing mechanism 002. One end of the liquid discharge bend pipe 21 is communicated with the bottom of the liquid discharge hopper 20, and the other end penetrates to one side of the wastewater treatment cylinder 1. The filtered wastewater can be discharged through the liquid discharge hopper 20 and the liquid discharge bend pipe 21.

[0038] It should be supplemented that, in order to further mix the wastewater and the extractant in the concave mixing tank and improve the stability of the wastewater during purification, an air inlet pressure regulating pipe 22 and an exhaust pipe 23 are communicated with the upper end cover 2. One end of the air inlet pressure regulating pipe 22 penetrates into the concave mixing tank. The air inlet pressure regulating pipe 22 corresponds to the water inlet bend pipe 12. A pressure sensor 24 capable of detecting the pressure in the concave mixing tank is arranged on the upper end cover 2.

[0039] Specifically, the intake pressure regulating pipe 22, the exhaust pipe 23, and the pressure sensor 24 provided on the upper end cover 2 cooperate with each other to achieve precise monitoring and regulation of the pressure in the concave mixing tank. The pressure sensor 24 monitors the pressure in the tank in real time. When the pressure is too high, the excess gas is released through the exhaust pipe 23. When the pressure is insufficient, gas can be supplemented through the intake pressure regulating pipe 22 to maintain the stability of the internal pressure of the device, avoiding equipment damage or safety hazards caused by abnormal pressure. At the same time, a stable pressure environment helps to ensure the stability and efficiency of the mixing reaction of wastewater and extractant, improving the overall treatment effect and the safety and reliability of equipment operation. Moreover, when the wastewater flow rate is large and the mixing efficiency is insufficient, gas can be continuously transported into the intake pressure regulating pipe 22, and the flow of bubbles in the wastewater is used to further improve the mixing efficiency of wastewater and extractant.

[0040] The specific working process of the wastewater treatment device for butyl acetate production is as follows: I. Synchronous injection of wastewater and extractant: The wastewater is injected into the wastewater treatment cylinder 1 from one side of the upper end cover 2 through the water inlet elbow 12, and at the same time, the extractant is synchronously injected through the additive pipe 13 (located at the bend of the water inlet elbow 12 and equipped with a one-way valve 14).

[0041] The design of synchronous proportional transportation ensures sufficient contact and preliminary mixing of the two.

[0042] II. Pressure regulation for auxiliary mixing: The intake pressure regulating pipe 22 and the exhaust pipe 23 on the upper end cover 2 cooperate with the pressure sensor 24 to monitor the pressure in the concave mixing tank in real time. When the pressure is too high, the exhaust pipe 23 releases gas; when the pressure is insufficient, the intake pressure regulating pipe 22 supplements gas to maintain the stability of the internal pressure.

[0043] If the mixing efficiency is insufficient, gas can be continuously injected through the intake pressure regulating pipe 22, and the flow of bubbles is used to strengthen the mixing of wastewater and extractant.

[0044] III. Multi-stage mixing reaction process: The wastewater and extractant enter the concave mixing tank above the special-shaped mixing partition plate 4. The mixing motor 10 is started to drive the mixing rotating rod 9 and the mixing blade group 11 (located between the upper end cover 2 and the special-shaped mixing partition plate 4) to rotate, and the liquid is preliminarily stirred and mixed.

[0045] The preliminarily mixed liquid flows downward through the liquid delivery pipe 7 in the concave mixing tank and reaches above the secondary partition plate 5.

[0046] The liquid reaches above the secondary partition plate 5 through the liquid delivery pipe 7 and is discharged through the water outlet elbow 6 (corresponding to the water outlet groove of the special-shaped mixing partition plate 4).

[0047] The drain elbow 6 is designed such that "the top end is higher than the bottom end of the infusion pipe 7", forcing the liquid to turn back upward and then flow downward. During this process, the water flow collides to achieve secondary mixing.

[0048] The mixing rod 9 drives the lower mixing blade group 11 (located between the special-shaped mixing partition plate 4 and the secondary partition plate 5) to rotate, accelerating the impact of the water flow and prolonging the mixing time to ensure sufficient reaction.

[0049] IV. Impurity filtration and impurity discharge: The mixed liquid falls through the drain elbow 6 into the funnel-shaped slag filter cover 8 (located between the secondary partition plate 5 and the packing mechanism 002 and linked to the mixing rod 9). The funnel-shaped structure intercepts and filters impurities or high-concentration polymers in the wastewater.

[0050] The filtered liquid continues to flow downward into the packing mechanism 002, and the impurities remain in the slag filter cover.

[0051] The mixing rod 9 drives the funnel-shaped slag filter cover 8 to rotate, using centrifugal force to throw the impurities towards the inner wall of the slag filter cover. At the same time, the slag scraping plate 16 (fixed to the inner wall of the wastewater treatment cylinder 1 and in contact with the inner wall of the slag filter cover at the bottom) scrapes the impurities towards the impurity discharge pipe 15 (flush with the top of the slag filter cover) and discharges them outside the device to avoid blockage.

[0052] V. Deep filtration and water discharge: The filtered liquid enters the packing mechanism 002, which consists of a packing frame 17 (with packing through holes around it) and a fan-shaped packing box 18 (detachably installed and having multiple layers of filtering packing 19 inside).

[0053] The multiple layers of packing conduct deep filtration on the wastewater to remove residual impurities and pollutants, ensuring that the water quality meets the standards.

[0054] The fan-shaped packing box 18 can be flexibly replaced to adapt to different water quality treatment requirements.

[0055] The wastewater filtered by the packing flows into the liquid discharge hopper 20 (located below the packing mechanism 002) and is discharged from the device through the liquid discharge elbow 21, and can be reused or discharged up to the standard.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.

Claims

1. A wastewater treatment device for butyl acetate production, characterized in that, Comprising: A wastewater treatment cylinder (1), with an upper end cover (2) and a lower end seat (3) detachably and sealingly arranged at the upper and lower ends of the wastewater treatment cylinder (1) respectively. A power mixing mechanism (001) is provided on the upper end cover (2), and a filling mechanism (002) is provided at the lower part of the wastewater treatment cylinder (1); A special-shaped mixing partition plate (4), sealingly arranged inside the wastewater treatment cylinder (1). An upper concave mixing groove is provided on the upper part of the special-shaped mixing partition plate (4), and a plurality of water discharge grooves are provided at equal angles at the lower part; A secondary partition plate (5), sealingly arranged inside the wastewater treatment cylinder (1) and located below the special-shaped mixing partition plate (4). A plurality of water discharge elbows (6) are arranged through the secondary partition plate (5) at equal angles. The water discharge elbows (6) correspond to the water discharge grooves one by one. One end of the water discharge elbow (6) extends into the water discharge groove. A plurality of liquid pipes (7) are arranged through the concave mixing groove. The top end of the water discharge elbow (6) is higher than the bottom end of the liquid delivery pipe (7); A funnel-shaped slag filtering cover (8), sealingly and rotatably arranged inside the wastewater treatment cylinder (1). The funnel-shaped slag filtering cover (8) is located between the secondary partition plate (5) and the filling mechanism (002). The funnel-shaped slag filtering cover (8) is connected to the power mixing mechanism (001). A slag discharging mechanism (003) capable of discharging impurities in the funnel-shaped slag filtering cover (8) is arranged on one side of the wastewater treatment cylinder (1).

2. The wastewater treatment device for butyl acetate production according to claim 1, characterized in that, The power mixing mechanism (001) includes: A mixing rotating rod (9), penetrating and rotatably arranged on the special-shaped mixing partition plate (4) and the secondary partition plate (5). One end of the mixing rotating rod (9) is connected to one end of the funnel-shaped slag filtering cover (8); A mixing motor (10), installed on the upper end cover (2). The output end of the mixing motor (10) is connected to one end of the mixing rotating rod (9); A plurality of mixing blade groups (11) are provided. The mixing blade groups (11) are arranged on the mixing rotating rod (9). The plurality of mixing blade groups (11) are respectively arranged between the special-shaped mixing partition plate (4) and the upper end cover (2) and between the special-shaped mixing partition plate (4) and the secondary partition plate (5).

3. The wastewater treatment device for butyl acetate production according to claim 2, characterized in that, A liquid inlet pipe group (004) capable of adding wastewater and extraction agent is provided on one side of the upper end cover (2); The liquid inlet pipe group (004) includes: A water inlet elbow (12), penetrating and arranged on one side of the upper end cover (2); An additive pipe (13), penetrating and arranged at the bent part of the water inlet elbow (12). A one-way valve (14) is installed on the additive pipe (13).

4. The wastewater treatment device for butyl acetate production according to claim 3, characterized in that, The slag discharging mechanism (003) includes: A slag discharging pipe (15), communicatively arranged on one side of the wastewater treatment cylinder (1). The bottom of the slag discharging pipe (15) is flush with the top of the funnel-shaped slag filtering cover (8); A slag scraping plate (16), arranged inside the wastewater treatment cylinder (1). The bottom of the slag scraping plate (16) is in contact with the inner wall of the funnel-shaped slag filtering cover (8). One end of the slag scraping plate (16) is located on one side of the slag discharging pipe (15).

5. The wastewater treatment device for butyl acetate production according to claim 4, characterized in that, The packing mechanism (002) comprises: A packing frame (17) is arranged on the wastewater treatment cylinder (1), and a plurality of packing through holes are provided at equal angles around the packing frame (17); A plurality of fan-shaped stuffing boxes (18) are provided, the fan-shaped stuffing boxes (18) corresponding to the stuffing through holes one by one, the fan-shaped stuffing boxes (18) are sealed and detachably arranged in the stuffing through holes, and multiple layers of filter stuffing (19) are provided in the fan-shaped stuffing boxes (18).

6. The wastewater treatment device for butyl acetate production according to claim 5, characterized in that, A drainage pipe group (005) is also provided in the wastewater treatment cylinder (1), and the drainage pipe group (005) is located below the filling mechanism (002); The drainage pipe assembly (005) comprises: A liquid drain hopper (20) is sealed and arranged in the wastewater treatment cylinder (1), and the liquid drain hopper (20) is located below the packing mechanism (002); A drain elbow (21) has one end connected to the bottom of the drain bucket (20) and the other end passing through one side of the wastewater treatment cylinder (1).

7. The wastewater treatment device for butyl acetate production according to claim 6, characterized in that, The upper end cover (2) is connected to an air intake pressure regulating pipe (22) and an exhaust pipe (23), one end of the air intake pressure regulating pipe (22) penetrates into the concave mixing tank, and the air intake pressure regulating pipe (22) corresponds to the water intake elbow (12).

8. The wastewater treatment device for butyl acetate production according to claim 7, characterized in that, The upper end cover (2) is provided with a pressure sensor (24) capable of detecting the pressure in the concave mixing tank.

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