A waste liquid treatment system for acetoacetanilide

Abstract

This invention relates to the field of wastewater treatment technology. It discloses a wastewater treatment system for acetoaniline, comprising a shell, a liquid supply mechanism, and a recovery mechanism. The temperature control partition plate near the rectangular adsorption treatment unit is provided with a heating zone, a cooling zone, and a traction rail. The cooling zones are staggered along the X-axis. The rectangular adsorption treatment unit is driven to slide back and forth along the X-axis by the traction rail, and several rectangular adsorption treatment units distributed along the Y-axis slide back and forth alternately. This shortens the temperature change time between the initial and high-efficiency periods, thereby increasing the high-efficiency time interval and controlling the movement reaction rapidly. It is suitable for applications with high concentrations and high toxicity of organic matter, ensuring that the entire adsorption treatment system remains in a state of high-efficiency adsorption and desorption, improving adsorption effect and efficiency within the same time period and adsorption volume.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically a wastewater treatment system for acetoacetanilide. Background Technology

[0002] The wastewater produced by the acylation reaction of diketene and aniline is too large, has a high concentration of organic matter, is highly toxic, and can inhibit the growth of microorganisms. In addition, a large amount of acetylaniline remains in the wastewater, with a concentration as high as 7000 mg / L. Therefore, the wastewater needs to be treated first and then subjected to biochemical treatment in order to ensure that the final wastewater treatment meets the specified requirements.

[0003] Firstly, ultra-high cross-linked adsorption resin is used as the adsorbent, which has a good adsorption effect. During desorption, at 50 degrees Celsius, an alkaline solution is used as the desorbent, and the desorption effect is good. Therefore, a series adsorption tower is used for adsorption operations. By switching between two adsorption towers, the water treatment cycle of adsorption and desorption is realized. However, in order to ensure the adsorption and desorption effects, the adsorption tower is often cylindrical. In order to filter a large amount of waste liquid at a time, the volume of the adsorption tower needs to be increased. To avoid deformation and blockage due to increased height, the cross-sectional area needs to be increased to ensure the volume. However, acetylaniline is exothermic. In order to increase the adsorption efficiency, the temperature needs to be lowered to ensure the adsorption rate. After adsorption saturation, due to the cooling effect of the cooling device on the adsorption tower, the temperature needs to be preheated to 50 degrees Celsius before desorption. At this time, due to the influence of the diameter, the efficiency of temperature transfer from the outside to the inside of the adsorption tower is too slow, resulting in a situation where the external temperature is qualified, but the internal temperature is insufficient. This leads to uneven elution in the early stage, resulting in the elution effect in the center of the adsorption tower being less than that at the edge within the rated time. Summary of the Invention

[0004] The purpose of this invention is to provide a waste liquid treatment system for acetoacetanilide to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A waste liquid treatment system for acetoacetanilide includes a shell, a liquid supply mechanism, and a recovery mechanism. The liquid supply mechanism is located at the top of the shell for supplying waste liquid and alkaline solution. The recovery mechanism is located below the shell for collecting the adsorbed waste liquid and the eluted liquid. The shell is equipped with an adsorption-desorption switching module that switches between filtration and adsorption according to the liquid supplied by the liquid supply mechanism. Several adsorption-desorption switching modules are distributed sequentially along the X-axis.

[0007] The adsorption-desorption switching module includes two enclosed plates and several rectangular adsorption processing units equidistantly distributed along the Y-axis in the middle of the enclosed plates. Several temperature control partition plates equidistantly distributed along the Y-axis are fixedly connected inside the housing. The temperature control partition plates are parallel to the X-axis and are located between two adjacent rectangular adsorption processing units along the Y-axis. Each temperature control partition plate has a heating zone, a cooling zone, and a traction rail on the side closest to the rectangular adsorption processing unit. The heating zone and the cooling zone are staggered along the X-axis. The rectangular adsorption processing unit is driven to slide back and forth along the X-axis by the traction rail, and the several rectangular adsorption processing units distributed along the Y-axis slide back and forth alternately.

[0008] The liquid supply mechanism includes a waste liquid delivery main pipe and an alkali desorption delivery main pipe. Both the waste liquid delivery main pipe and the alkali desorption delivery main pipe are parallel to the X-axis direction. The side of the waste liquid delivery main pipe is provided with a number of waste liquid delivery branch pipes that are equally distributed and correspond to the number of the sealing plates. The side of the alkali desorption delivery main pipe is provided with a number of alkali desorption delivery branch pipes that are equally distributed and correspond to the number of the sealing plates. The waste liquid delivery branch pipes are connected to the rectangular adsorption treatment unit through solenoid valves, and the alkali desorption delivery branch pipes are connected to the rectangular adsorption treatment unit through solenoid valves.

[0009] As a further embodiment of the present invention: the adsorption-desorption switching module further includes a collection mechanism disposed below the closed plate. The collection mechanism includes a waste liquid triangular collection chamber corresponding to the waste liquid conveying branch pipe and an eluent triangular collection chamber corresponding to the alkaline desorption conveying branch pipe. The bottom of both the waste liquid triangular collection chamber and the eluent triangular collection chamber are triangular.

[0010] As a further embodiment of the present invention: the recycling mechanism includes a waste liquid transfer box and an eluent storage box. The bottom of the waste liquid triangular collection bin and the eluent triangular collection bin are respectively provided with a waste liquid guide pipe and an eluent guide pipe. The waste liquid guide pipe and the eluent guide pipe are distributed in opposite directions. The waste liquid guide pipe is connected to the waste liquid transfer box, and the eluent guide pipe is connected to the eluent storage box.

[0011] As a further aspect of the present invention: the traction rail is provided with a plurality of displacement zones on the side near the rectangular adsorption processing unit, and the displacement zones control the rectangular adsorption processing unit to slide and switch between the heating zone and the cooling zone.

[0012] As a further embodiment of the present invention: the top and bottom of the rectangular adsorption treatment unit are provided with holes, the opposite sides of the two sealing plates are fixedly connected with rubber sealing layers, the top of the rectangular adsorption treatment unit is attached with a Teflon film, and the rectangular adsorption treatment unit is slidably connected to the sealing plate.

[0013] As a further aspect of the present invention: the displacement zone controls the single sliding distance of the rectangular adsorption processing unit to be equal to the length of the rectangular adsorption processing unit along the X-axis direction, and the widths of the heating zone and the cooling zone along the X-axis direction correspond to the width of the rectangular adsorption processing unit.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] For wastewater with high organic matter concentration and high toxicity, during the pre-biological treatment, the staggered movement of two sets of rectangular adsorption units alters the liquid injection into the rectangular adsorption units via the liquid supply mechanism. This allows the rectangular adsorption units to switch between adsorption and desorption. During the staggered movement of the two sets of rectangular adsorption units, the heating and cooling zones on the temperature control partition plate simultaneously move relative to the rectangular adsorption units, directly influencing their temperature and humidity. Furthermore, because the overall adsorption volume is divided into several rectangular strips, the adhesion area is increased while reducing the temperature transfer impact caused by thickness. Meanwhile, compared to the temperature control structure of the adsorption tower, which directly switches between cooling and heating, this improves the temperature switching efficiency. Furthermore, in this state, the rate at which temperature affects the resin inside the rectangular adsorption unit is greatly increased, thus shortening the temperature change time between the initial and high-efficiency periods. This extends the high-efficiency time range, improves the adsorption effect, and allows for short displacement and rapid control of the movement reaction. Specifically designed for applications involving large volumes of acetylaniline wastewater with high organic concentrations and high toxicity, this system can maintain the entire adsorption treatment system in a state of high-efficiency adsorption and desorption, improving adsorption effect and efficiency within the same time period and adsorption volume. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional schematic diagram of a waste liquid treatment system for acetoacetanilide;

[0018] Figure 2An explosion diagram of a waste liquid treatment system for acetoacetanilide;

[0019] Figure 3 This is a schematic diagram of the switching of the adsorption-desorption switching module in a waste liquid treatment system for acetoacetanilide;

[0020] Figure 4 This is a three-dimensional schematic diagram of an adsorption-desorption switching module in a waste liquid treatment system for acetoacetanilide.

[0021] Figure 5 This is a simplified schematic diagram of the switching of the adsorption-desorption switching module in a waste liquid treatment system for acetoacetanilide.

[0022] In the diagram: 100, Adsorption-Desorption Switching Module; 1, Housing; 11, Enclosure Plate; 2, Liquid Supply Mechanism; 21, Waste Liquid Transport Main Pipe; 211, Waste Liquid Transport Branch Pipe; 22, Alkali Desorption Transport Main Pipe; 221, Alkali Desorption Transport Branch Pipe; 3, Recovery Mechanism; 31, Waste Liquid Transfer Box; 32, Eluent Temporary Storage Box; 4, Collection Mechanism; 41, Waste Liquid Triangular Collection Chamber; 411, Waste Liquid Guide Pipe; 42, Eluent Triangular Collection Chamber; 421, Eluent Guide Pipe; 5, Temperature Control Dividing Plate; 51, Heating Zone; 52, Cooling Zone; 53, Traction Rail; 531, Displacement Zone; 6, Rectangular Adsorption Processing Unit. Detailed Implementation

[0023] Please see Figures 1-5 To make it easier to explain the location, in Figure 1 , Figure 2 , Figure 3 The coordinate systems are marked in the figures. This invention includes:

[0024] The shell 1, the liquid supply mechanism 2, and the recovery mechanism 3 are provided. The liquid supply mechanism 2 is located at the top of the shell 1 to supply waste liquid and alkaline solution. The recovery mechanism 3 is located at the bottom of the shell 1 to collect the waste liquid after adsorption and the liquid after elution. The shell 1 is equipped with an adsorption-desorption switching module 100 that switches between filtration and adsorption according to the liquid supplied by the liquid supply mechanism 2. Several adsorption-desorption switching modules 100 are distributed sequentially along the X-axis.

[0025] Firstly, the shell 1 mainly serves as a seal. The liquid supply mechanism 2 is located above the shell 1, or it can be located below as needed. The liquid supply mechanism 2 is powered by an external delivery pump, which transports the acetoacetanilide preparation waste liquid and eluent to the interior of the shell 1. This is used for pre-treatment of the liquid by adsorption through the medium and for desorption of the medium for secondary adsorption. The adsorption-desorption switching module 100 is distributed along the X-axis inside the shell 1. After the liquid is adsorbed by the adsorption-desorption switching module 100, the residual organic matter and acetoacetanilide inside are adsorbed, reducing the organic matter content of the waste liquid after it flows out, thus preparing for subsequent biochemical treatment.

[0026] The adsorption-desorption switching module 100 includes two closed plates 11 and several rectangular adsorption processing units 6 equidistantly distributed along the Y-axis in the middle of the closed plates 11. Several temperature control partition plates 5 equidistantly distributed along the Y-axis are fixedly connected inside the housing 1. The temperature control partition plates 5 are parallel to the X-axis and are located between two adjacent rectangular adsorption processing units 6 along the Y-axis. Each side of the temperature control partition plate 5 near the rectangular adsorption processing unit 6 is provided with a heating zone 51, a cooling zone 52, and a traction rail 53. The heating zone 51 and the cooling zone 52 are staggered along the X-axis. The rectangular adsorption processing unit 6 is driven to slide back and forth along the X-axis by the traction rail 53. Several rectangular adsorption processing units 6 distributed along the Y-axis slide back and forth alternately.

[0027] The adsorption-desorption switching module 100 consists of two closed plates 11, which are initially arranged vertically. The rectangular adsorption processing unit 6, formed between the two closed plates 11, consists of an open-top and bottom shell. The shell contains ultra-high cross-linking adsorption resin. (See also...) Figure 2 and Figure 5When not in use, the rectangular adsorption treatment units 6 are linearly distributed along the long side of the closed plate 11, and several of the rectangular adsorption treatment units 6 form a straight line. For ease of explanation, the rectangular adsorption treatment units 6 in each adsorption-desorption switching module 100 are staggered and composed of adsorption modules A and B, respectively. In the initial stage, adsorption modules A and B are located on the same straight line. At this time, the temperature control partition plate 5 is located between two adjacent rectangular adsorption treatment units 6 along the Y-axis. At this time, liquid is first supplied through adsorption module A, and the cooling zone 52 on the temperature control partition plate 5 cools adsorption module A. After the waste liquid passes through adsorption module A, heat is released, and the temperature of adsorption module A increases. After the temperature increases, the temperature is controlled by the cooling zone 52. The temperature control separator 5 is cooled to maintain a certain temperature, preventing a decrease in adsorption efficiency due to overheating. As adsorption proceeds, adsorption module A reaches adsorption saturation. After adsorption module A becomes saturated, it is moved towards the heating zone 51 within the adsorption-desorption switching module 100 by the traction rail 53. Upon reaching the heating zone 51, the adsorption module A is heated to 50 degrees Celsius to improve desorption efficiency. Since the rectangular adsorption processing unit 6 is rectangular, the diameter effect is reduced when the two long sides contact the heating zone 51, allowing the temperature of the heating zone 51 to be quickly transferred to the center of the rectangular adsorption processing unit 6, thus improving the desorption effect. The liquid elutes the ultra-high cross-linked adsorption resin inside the rectangular adsorption unit 6 of adsorption module A. The eluted liquid flows downwards. In this case, the waste liquid is injected into the interior of adsorption module B. At this time, the cooling zone 52 near adsorption module B is activated to heat adsorption module B. The staggered distribution of adsorption modules A and B shortens the distance between them. Simultaneously, heat insulation material is provided between heating zone 51 and cooling zone 52. The heat transfer effect of heating zone 51 and cooling zone 52 is blocked by the heat insulation, thereby reducing the mutual influence between adsorption modules A and B. As a result, adsorption modules A and B reciprocate, and heating zone 51 and cooling zone 52 begin to stagger. This system abandons the traditional single-column or multi-column switching method for liquid switching. Through the rapid switching of the rectangular adsorption treatment unit 6, the temperature control structure eliminates the need for hot-cold switching, improving temperature switching efficiency. Simultaneously, this state significantly increases the rate at which temperature affects the resin inside the rectangular adsorption treatment unit 6, thereby shortening the temperature change time between the initial and high-efficiency periods. This extends the high-efficiency time range and enhances the adsorption effect. Furthermore, the short displacement and rapid motion control make it ideal for applications involving large volumes of acetylaniline wastewater with high organic concentrations and high toxicity. It can maintain the entire adsorption treatment system in a state of high-efficiency adsorption and desorption, improving adsorption effect and efficiency within the same time period and adsorption volume.

[0028] The liquid supply mechanism 2 includes a waste liquid conveying main pipe 21 and an alkaline desorption conveying main pipe 22. Both the waste liquid conveying main pipe 21 and the alkaline desorption conveying main pipe 22 are parallel to the X-axis direction. The side of the waste liquid conveying main pipe 21 is provided with several waste liquid conveying branch pipes 211 that are equidistantly distributed and correspond to the number of sealing plates 11. The side of the alkaline desorption conveying main pipe 22 is provided with several alkaline desorption conveying branch pipes 221 that are equidistantly distributed and correspond to the number of sealing plates 11. The waste liquid conveying branch pipes 211 are connected to the rectangular adsorption treatment unit 6 through solenoid valves, and the alkaline desorption conveying branch pipes 221 are connected to the rectangular adsorption treatment unit 6 through solenoid valves.

[0029] First, the movement mode of the rectangular adsorption processing unit 6 has been described above. After the rectangular adsorption processing unit 6 moves, if the liquid supply mechanism 2 were to follow the movement, it would complicate the structure. Therefore, the liquid supply mechanism 2 remains fixed. Please refer to [link to relevant documentation]. Figure 3 As shown in the diagram, the branch pipes of the waste liquid conveying main pipe 21 and the alkali desorption conveying main pipe 22 are waste liquid conveying branch pipe 211 and alkali desorption conveying branch pipe 221, respectively. Waste liquid conveying branch pipe 211 and alkali desorption conveying branch pipe 221 correspond to adsorption module A and adsorption module B within the adsorption-desorption switching module 100, respectively. The number of solenoid valves in waste liquid conveying branch pipe 211 and alkali desorption conveying branch pipe 221 is equal to the sum of the number of adsorption modules A and B. When adsorption module A corresponds to waste liquid conveying branch pipe 211, adsorption module B corresponds to alkali desorption conveying branch pipe 221. When adsorption module B resets and injects wastewater through waste liquid conveying branch pipe 211 for adsorption, alkali desorption conveying branch pipe 221 corresponds to adsorption module A. At this time, the waste liquid is conveyed... The solenoid valves of the waste liquid delivery branch pipe 211 and the alkali desorption delivery branch pipe 221 only need to be opened by the controller when the adsorption module A and the adsorption module B are controlled to move. This can switch and close the connecting pipeline. The temperature control partition plate 5 is parallel to the X-axis. At this time, the rectangular adsorption treatment unit 6 switches the heating zone 51 or cooling zone 52 that is in contact with the rectangular adsorption treatment unit 6 while the pipeline is naturally switched. Similarly, the controller opens the heating zone 51 or cooling zone 52 corresponding to the rectangular adsorption treatment unit 6 according to the movement direction of the adsorption module A and the adsorption module B. Therefore, unidirectional movement can realize the switching of heating and cooling structures and make heating and cooling correspond to desorption and adsorption.

[0030] The suction-desorption switching module 100 also includes a collection mechanism 4 located below the closed plate 11. The collection mechanism 4 includes a waste liquid triangular collection chamber 41 corresponding to the waste liquid conveying branch pipe 211 and an eluent triangular collection chamber 42 corresponding to the alkaline desorption conveying branch pipe 221. The bottoms of the waste liquid triangular collection chamber 41 and the eluent triangular collection chamber 42 are triangular. The recycling mechanism 3 includes a waste liquid transfer box 31 and an eluent temporary storage box 32. The bottoms of the waste liquid triangular collection chamber 41 and the eluent triangular collection chamber 42 are respectively provided with waste liquid guide pipe 411 and eluent guide pipe 421. The waste liquid guide pipe 411 and the eluent guide pipe 421 are distributed in opposite directions. The waste liquid guide pipe 411 is connected to the waste liquid transfer box 31, and the eluent guide pipe 421 is connected to the eluent temporary storage box 32.

[0031] First, the collection mechanism 4 is located below the closed plate 11. The collection mechanism 4 is divided into a waste liquid triangular collection chamber 41 and an eluent triangular collection chamber 42. The waste liquid triangular collection chamber 41 corresponds to the waste liquid conveying branch pipe 211, and the eluent triangular collection chamber 42 corresponds to the alkaline desorption conveying branch pipe 221. At this time, the liquid discharged from the waste liquid conveying branch pipe 211 flows downward to the waste liquid triangular collection chamber 41 due to gravity. After the liquid is collected and guided by the waste liquid triangular collection chamber 41, it flows to the waste liquid transfer transfer box 31 through the waste liquid guide pipe 411. The liquid guided by the eluent triangular collection chamber 42 flows downward due to gravity and flows to the inside of the eluent temporary storage box 32 through the eluent guide pipe 421. The liquid is collected by the eluent temporary storage box 32 and then transferred or treated again.

[0032] Several displacement zones 531 are provided on the side of the traction rail 53 near the rectangular adsorption processing unit 6. The displacement zones 531 control the rectangular adsorption processing unit 6 to slide and switch between the heating zone 51 and the cooling zone 52.

[0033] Each displacement zone 531 of the traction rail 53 corresponds to a motion component. The motion component can be switched according to the volume of the rectangular adsorption processing unit 6. If the overall volume of the rectangular adsorption processing unit 6 is small, the displacement zone 531 can be controlled by a slide rail, a slider, and a bidirectional electromagnet. The slider is fixedly connected to the rectangular adsorption processing unit 6. The two electromagnets apply repulsive and attractive forces to the slider to achieve rapid sliding of the rectangular adsorption processing unit 6. If the volume of the rectangular adsorption processing unit 6 is too large, a lead screw can be used to drive the slider to slide horizontally and achieve reciprocating motion of the rectangular adsorption processing unit 6.

[0034] The rectangular adsorption treatment unit 6 has holes at the top and bottom. The two sealing plates 11 are fixedly connected to the opposite sides with rubber sealing layers. The top of the rectangular adsorption treatment unit 6 is covered with a Teflon film. The rectangular adsorption treatment unit 6 is slidably connected to the sealing plate 11.

[0035] Firstly, the holes at the top and bottom of the rectangular adsorption treatment unit 6 are mainly for connecting with the solenoid valve pipes of the waste liquid conveying branch pipe 211, the alkaline desorption conveying branch pipe 221, and the connecting pipe of the waste liquid triangular collection chamber 41. At this time, the rectangular adsorption treatment unit 6 mainly contacts the sealing plate 11. A rubber sealing layer is provided on the sealing plate 11. Pressure is applied to the rectangular adsorption treatment unit 6 through the sealing plate 11, causing the rubber to undergo elastic deformation. At this time, a Teflon film is provided at the end of the rectangular adsorption treatment unit 6, which reduces the sliding friction between the rectangular adsorption treatment unit 6 and the rubber layer. After the rubber layer undergoes elastic deformation, it can still slide more smoothly. When the rectangular adsorption treatment unit 6 moves horizontally, the hole at the top of the rectangular adsorption treatment unit 6 is affected by the rubber and can still maintain a sealed state.

[0036] The displacement zone 531 controls the single sliding distance of the rectangular adsorption processing unit 6 to be equal to the length of the rectangular adsorption processing unit 6 along the X-axis direction, and the width of the heating zone 51 and the cooling zone 52 along the X-axis direction corresponds to the width of the rectangular adsorption processing unit 6.

[0037] Firstly, when the sliding distance of the rectangular adsorption processing unit 6 controlled by the displacement zone 531 is not less than the width of the rectangular adsorption processing unit 6, the rectangular adsorption processing unit 6 of adsorption module A and the rectangular adsorption processing unit 6 of adsorption module B can be prevented from intersecting, thereby avoiding temperature interference and ensuring that the temperature transfer between adsorption and desorption is not affected by direct contact.

[0038] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A system for treating waste liquid of acetoacetanilide, comprising a shell (1), a liquid supply mechanism (2) and a recovery mechanism (3), wherein the liquid supply mechanism (2) is arranged on the top of the shell (1) for supplying waste liquid and lye, and the recovery mechanism (3) is arranged below the shell (1) for collecting waste liquid after adsorption and liquid after elution. The inside of the shell (1) is provided with an adsorption switching module (100) for filtering and adsorbing switching supplied by the liquid supply mechanism (2); a plurality of the adsorption switching modules (100) are sequentially distributed along the X-axis direction; The adsorption switching module (100) comprises two closure plates (11) and a plurality of rectangular adsorption processing units (6) equidistantly distributed along the Y-axis direction in the middle of the closure plate (11), a plurality of temperature control separation splints (5) equidistantly distributed along the Y-axis direction are fixedly connected in the inside of the shell (1), the temperature control separation splint (5) is parallel to the X-axis, the temperature control separation splint (5) is located between two adjacent rectangular adsorption processing units (6) along the Y-axis direction, one side of the temperature control separation splint (5) close to the rectangular adsorption processing unit (6) is provided with a heating area (51), a cooling area (52) and a traction rail (53), the heating area (51) and the cooling area (52) are staggered along the X-axis direction, the rectangular adsorption processing unit (6) is driven to reciprocate along the X-axis direction through the traction rail (53), and a plurality of rectangular adsorption processing units (6) distributed along the Y-axis direction reciprocate alternately. The liquid supply mechanism (2) comprises a waste liquid conveying main pipe (21) and an alkali desorption conveying main pipe (22), the waste liquid conveying main pipe (21) and the alkali desorption conveying main pipe (22) are parallel to the X-axis direction, a plurality of waste liquid conveying branch pipes (211) equidistantly distributed corresponding to the number of the closure plate (11) are arranged on the side of the waste liquid conveying main pipe (21), a plurality of alkali desorption conveying branch pipes (221) equidistantly distributed corresponding to the number of the closure plate (11) are arranged on the side of the alkali desorption conveying main pipe (22), the waste liquid conveying branch pipe (211) is communicated with the rectangular adsorption processing unit (6) through an electromagnetic valve, and the alkali desorption conveying branch pipe (221) is communicated with the rectangular adsorption processing unit (6) through an electromagnetic valve.

2. The system for treating waste liquid of acetoacetanilide according to claim 1, characterized in that: The adsorption switching module (100) further comprises a collection mechanism (4) arranged below the closure plate (11), the collection mechanism (4) comprises a waste liquid triangular collection bin (41) corresponding to the waste liquid conveying branch pipe (211) and an eluent triangular collection bin (42) corresponding to the alkali desorption conveying branch pipe (221), and the bottom of the waste liquid triangular collection bin (41) and the eluent triangular collection bin (42) is triangular.

3. A system for treating waste liquid of acetoacetanilide according to claim 2, characterized by: The recovery mechanism (3) comprises a waste liquid transfer transfer box (31) and an eluent temporary storage box (32), the bottom of the waste liquid triangular collection bin (41) and the eluent triangular collection bin (42) is respectively provided with a waste liquid guide pipe (411) and an eluent guide pipe (421), the distribution directions of the waste liquid guide pipe (411) and the eluent guide pipe (421) are opposite, the waste liquid guide pipe (411) is communicated with the waste liquid transfer transfer box (31), and the eluent guide pipe (421) is communicated with the eluent temporary storage box (32).

4. The system for treating waste liquid of acetoacetanilide according to claim 1, wherein: The traction rail (53) is provided with a plurality of displacement areas (531) near one side of the rectangular adsorption treatment unit (6), the displacement areas (531) control the rectangular adsorption treatment unit (6) to slide and switch between the heating area (51) and the cooling area (52).

5. The system for treating waste liquid of acetoacetanilide according to claim 1, characterized in that: The top and bottom of the rectangular adsorption treatment unit (6) are provided with holes, the opposite sides of the two sealing plates (11) are fixedly connected with rubber sealing layers, the top of the rectangular adsorption treatment unit (6) is attached with a Teflon film, and the rectangular adsorption treatment unit (6) is slidably connected with the sealing plate (11).

6. The system for treating waste liquid of acetoacetanilide according to claim 4, wherein: The displacement area (531) controls the single sliding distance of the rectangular adsorption treatment unit (6) to be equal to the length of the rectangular adsorption treatment unit (6) along the X-axis direction, and the width of the heating area (51) and the cooling area (52) along the X-axis direction corresponds to the width of the rectangular adsorption treatment unit (6).

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