An ethyl acetate separation and recovery system based on industrial wastewater and a treatment process

Abstract

The application belongs to the technical field of wastewater treatment, and particularly relates to an ethyl acetate separation and recovery system and treatment process based on industrial wastewater, which comprises a rectifying tower, a pretreatment tower and a layered tank, the top of the rectifying tower is connected with a condenser, the bottom is connected with a reboiler, and a first liquid inlet is arranged, the pretreatment tower is connected with the first liquid inlet, a conveying pump is arranged between the pretreatment tower and the rectifying tower, and is used for filtering the industrial wastewater, the layered tank is connected with the output end of the condenser and is connected with a water injection pipe, and a plurality of layered tanks are arranged, wherein the conveying pipe and the water injection pipe arranged on one side of the layered tank are provided with valves, and water is injected into the layered tank through the water injection pipe; the industrial wastewater is filtered through the pretreatment tower to remove suspended solids and other small particles in the industrial wastewater, so as to avoid affecting the subsequent treatment efficiency and the quality of the recovered ethyl acetate and ethanol, and a plurality of layered tanks are arranged to avoid waiting for a standing time, and the plurality of layered tanks are used in turn, so that the separation and recovery efficiency is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to an ethyl acetate separation and recovery system and treatment process based on industrial wastewater. Background Technology

[0002] Industrial production processes, especially the production of ethyl acetate, generate large amounts of mixed wastewater containing ethyl acetate, ethanol, and water. Direct discharge of this wastewater not only wastes resources but may also cause serious environmental pollution. While ethyl acetate and ethanol in this wastewater have high recovery value, their miscibility and azeotropic properties make the separation process complex and energy-intensive.

[0003] For example, Chinese patent application number (CN202210096268.4) discloses a device and method for recovering ethyl acetate from β-carotene extraction wastewater, including an adsorption column, a condenser, and a separation tank. This application adsorbs ethyl acetate and ethanol through the adsorption column, then condenses them into an desorbed liquid through the condenser, and finally passes the desorbed liquid into a separation tank for settling. After water and ethyl acetate separate into layers, water and ethyl acetate are discharged sequentially to achieve the recovery of ethyl acetate. However, it does not pre-treat the wastewater. The suspended solids and other water-insoluble fine particles in the wastewater can easily affect the efficiency of subsequent treatment and the quality of the product. Furthermore, this application uses a separation tank to separate ethyl acetate, ethanol, and aqueous solution, but the settling time can easily affect the separation and recovery efficiency of ethyl acetate. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned technical problems by providing an ethyl acetate separation and recovery system and process based on industrial wastewater, which achieves the removal of suspended solids in wastewater, continuous separation and recovery, and improved recovery efficiency.

[0005] In view of this, the present invention provides an ethyl acetate separation and recovery system based on industrial wastewater, comprising:

[0006] A distillation column, with a condenser connected to the top and a reboiler connected to the bottom, and a first liquid inlet;

[0007] The pretreatment tower is connected to the first inlet of the distillation tower and is equipped with a transfer pump between the two towers. It is used to filter industrial wastewater.

[0008] The stratified tank is equipped with a delivery pipe connected to the output end of the condenser and a water injection pipe, and has multiple such tanks.

[0009] The delivery pipe and the water injection pipe are both equipped with valves on one side of the stratification tank, and water is injected into the stratification tank through the water injection pipe.

[0010] In the above technical solution, the pretreatment tower further includes:

[0011] The tower body has a second liquid inlet and a liquid outlet, and the liquid outlet is connected to a delivery pump, and a filter chamber and a buffer chamber are formed inside.

[0012] A filter screen is installed inside the filter chamber, and the second liquid inlet is located above the filter screen;

[0013] The filter chamber and the buffer chamber are connected by a liquid inlet, and the filter chamber is equipped with a feed inlet.

[0014] In the above technical solution, the pretreatment tower further includes:

[0015] A brush assembly is installed on the filter screen and is used for cleaning the surface of the filter screen;

[0016] The drive assembly is mounted on the top wall of the filter chamber;

[0017] The filter screen is designed to be raised and lowered, and the drive component is used to drive the filter screen to be raised and lowered as well as the movement of the brush component.

[0018] In the above technical solution, the driving component further includes:

[0019] The reciprocating lead screw is axially positioned inside the filter chamber, and its top end penetrates the top wall of the buffer chamber and is connected to a drive motor.

[0020] A reciprocating screw nut is fitted onto the reciprocating screw, and a filter screen is installed on the reciprocating screw nut;

[0021] The gearbox is mounted on the top wall of the filter chamber and is used for transmission between the drive assembly and the brush assembly.

[0022] In the above technical solution, the gearbox further includes:

[0023] The toothed ring is installed on the top wall of the filter chamber;

[0024] The sun gear is fixedly mounted on the reciprocating lead screw;

[0025] Planetary gears, multiple of which are arranged around the sun gear, mesh with the ring gear and the sun gear respectively;

[0026] The planetary carrier is movably mounted on the reciprocating lead screw and is used to mount multiple planetary gears;

[0027] The housing is attached to the top wall of the filter chamber and is used to install the toothed ring.

[0028] The brush assembly is connected to the planetary gear.

[0029] In the above technical solution, the brush assembly further includes:

[0030] The bracket is sleeved on the reciprocating lead screw and includes multiple axial brush handles arranged at equal intervals around the circumference;

[0031] The first bristle is installed on the side of the axial brush handle closest to the filter screen;

[0032] The telescopic rod is connected at one end to the axial brush handle and at the other end to the planetary gear bearing.

[0033] The bracket abuts against the upper end face of the reciprocating lead screw nut.

[0034] In the above technical solution, further:

[0035] A gap is provided between the radial inner wall of the support and the surface of the reciprocating lead screw;

[0036] The bracket has multiple slots that communicate with the gap on the side near the reciprocating screw nut.

[0037] In the above technical solution, the brush assembly further includes:

[0038] Radial brush handle, installed on the side of the axial brush handle away from the axis;

[0039] The second bristle is installed on the radial brush handle near the side wall of the filter chamber.

[0040] In the above technical solution, further:

[0041] The filter chamber is also equipped with a drain outlet, which is located above the lowest point of the filter screen and is detachably covered.

[0042] This invention provides a treatment process for an ethyl acetate separation and recovery system based on industrial wastewater, comprising the following steps:

[0043] S1: Industrial wastewater is fed into a pretreatment tower to remove water-insoluble suspended impurities from the industrial wastewater.

[0044] S2: The pretreated industrial wastewater is pumped into a distillation tower for distillation, where ethyl acetate and ethanol are separated and condensed to form a mixture.

[0045] S3: Pass the mixture of ethyl acetate and ethanol into a separate separation tank, then pass water through it and let it stand.

[0046] S4: Multiple layered tanks sequentially complete the above S3;

[0047] S5: Repeat S1-S4.

[0048] The beneficial effects of this invention are as follows:

[0049] 1. By setting up a pretreatment tower, the industrial wastewater is filtered to remove suspended solids and other fine particles, thus avoiding affecting the efficiency of subsequent treatment and the quality of the recovered ethyl acetate and ethanol. In addition, multiple stratified tanks are used to avoid waiting for settling time. The multiple stratified tanks are used in sequence to effectively improve the separation and recovery efficiency.

[0050] 2. By setting the column body as a filter chamber and a buffer chamber, the continuous injection into the distillation column is ensured under the action of the buffer chamber, avoiding the inability to continuously inject into the distillation column due to the slow liquid flow rate of the filter screen, which would affect the performance of the transfer pump.

[0051] 3. By setting up a drive component to drive the lifting and lowering of the filter screen and the movement of the brush assembly, the adhesion of fine particles such as suspended matter to the mesh of the filter screen can be reduced, thus reducing the clogging of the filter screen and improving the filtration efficiency. Furthermore, the drive component and the brush assembly are transmitted through a gearbox, reducing the power source and achieving the effects of energy saving, consumption reduction, and improved energy utilization. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of the present invention;

[0053] Figure 2 This is a schematic diagram of the internal structure of the pretreatment tower of the present invention;

[0054] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0055] Figure 4 This is the present invention. Figure 2 Enlarged view of point B in the middle;

[0056] Figure 5 This is a partial cross-sectional view of the pretreatment tower of the present invention;

[0057] Figure 6 This is a schematic diagram of the structure of the drive component and brush component of the present invention;

[0058] The markings in the diagram represent: 1. Distillation column; 2. Condenser; 3. Reboiler; 4. First inlet; 5. Pretreatment column; 50. Column body; 500. Second inlet; 501. Outlet; 502. Filter chamber; 5020. Drain; 5021. Cap; 503. Buffer chamber; 504. Liquid outlet; 505. Feed inlet; 51. Filter screen; 52. Brush assembly; 520. Support; 5200. Gap; 5201. Groove; 521. Axial direction. 522. Brush handle; 523. First bristle; 524. Telescopic rod; 525. Radial brush handle; 526. Second bristle; 53. Drive assembly; 530. Reciprocating lead screw; 531. Drive motor; 532. Reciprocating lead screw nut; 533. Gearbox; 5330. Gear ring; 5331. Sun gear; 5332. Planetary gear; 5333. Planetary carrier; 5334. Housing; 6. Transfer pump; 7. Layered tank; 8. Transfer pipe; 9. Water injection pipe; 10. Valve. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0060] Example 1:

[0061] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater, including:

[0062] A distillation column 1 is provided, with a condenser 2 connected to the top of the column, a reboiler 3 connected to the bottom of the column, and a first liquid inlet 4.

[0063] The pretreatment tower 5 is connected to the first inlet 4 of the distillation tower 1, and a transfer pump 6 is provided between the pretreatment tower 5 and the distillation tower 1 for filtering industrial wastewater.

[0064] The stratified tank 7 is equipped with a delivery pipe 8 connected to the output end of the condenser 2, and is also connected to a water injection pipe 9, and has multiple such pipes;

[0065] Among them, the conveying pipe 8 and the water injection pipe 9 are both equipped with valves 10 on one side of the layered tank 7, and water is injected into the layered tank 7 through the water injection pipe 9. Specifically, the main water pipe is connected to a water pump and a water storage tank.

[0066] Meanwhile, valve 10 can be a solenoid valve or a regular valve. Its specific structure, along with that of distillation column 1, condenser 2, reboiler 3, and transfer pump 6, are all existing mature technologies and will not be elaborated here.

[0067] As can be seen from this embodiment, by setting up the pretreatment tower 5, the industrial wastewater is filtered to remove suspended solids and other fine particles from the industrial wastewater, so as to avoid affecting the efficiency of subsequent treatment and the quality of the recovered ethyl acetate and ethanol.

[0068] Furthermore, multiple layered tanks 7 are used to avoid waiting time, and the multiple layered tanks 7 are used in a cycle in sequence, which effectively improves the separation and recovery efficiency;

[0069] Specifically, when one layering tank 7 is settling and separating, the mixture of ethyl acetate and ethanol is introduced into another layering tank 7, and so on. After the first layering tank 7 has finished settling, the ethyl acetate and ethanol aqueous solutions are discharged separately, and then the mixture of ethyl acetate and ethanol can be injected into the first layering tank 7 to achieve circulation. Therefore, the number of layering tanks 7 can be set according to the time required for one layering tank 7 to be filled and discharged.

[0070] Example 2:

[0071] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the pretreatment tower 5 includes:

[0072] The tower body 50 has a second liquid inlet 500 and a liquid outlet 501, and the liquid outlet 501 is connected to the transfer pump 6, and a filter chamber 502 and a buffer chamber 503 are formed inside it.

[0073] A filter screen 51 is installed inside the filter chamber 502, and the second liquid inlet 500 is located above the filter screen 51;

[0074] The filter chamber 502 and the buffer chamber 503 are provided with a liquid outlet 504, and the filter chamber 502 is provided with a feed inlet 505.

[0075] Meanwhile, multiple liquid inlets 504 can be configured and have a small diameter. The filter screen 51 is a corrosion-resistant metal filter screen 51, specifically made of stainless steel.

[0076] As can be seen from this embodiment, by setting the column body 50 as a filter chamber 502 and a buffer chamber 503, the continuous injection into the distillation column 1 is ensured under the action of the buffer chamber 503, and the continuous injection into the distillation column 1 is avoided due to the slow liquid flow rate of the filter screen 51, which would affect the performance of the delivery pump 6.

[0077] The feed inlet 505 allows for easy addition of flocculants, improving the filtration effect.

[0078] Example 3:

[0079] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the pretreatment tower 5 further includes:

[0080] The brush assembly 52 is mounted on the filter screen 51 and is used for cleaning the surface of the filter screen 51.

[0081] The drive assembly 53 is installed on the top wall of the filter chamber 502;

[0082] The filter screen 51 is designed to be raised and lowered, and the drive assembly 53 is used to drive the filter screen 51 to be raised and lowered as well as the movement of the brush assembly 52. ​​The filter screen 51 is always lower than the height of the second liquid inlet 500 when it is raised and lowered.

[0083] As can be seen from this embodiment, by setting the driving component 53 to drive the filter screen 51 to rise and fall and the brush component 52 to move, it is possible to reduce the adhesion of fine particles such as suspended matter to the mesh of the filter screen 51, thereby reducing the clogging of the filter screen 51 and improving the filtration efficiency.

[0084] Specifically, when the filter screen 51 moves down, wastewater will flow through the pores of the filter screen 51, thereby causing the wastewater to pass through the filter screen 51 from bottom to top, which will have a backwashing effect on the filter screen 51. The brush assembly 52 can clean the surface of the filter screen 51 to prevent fine particles such as suspended matter from adhering to the mesh of the filter screen 51.

[0085] Furthermore, the drive assembly 53 and the brush assembly 52 are driven by a gearbox 533, which reduces the power source and achieves the effects of energy saving, consumption reduction, and improved energy utilization.

[0086] Example 4:

[0087] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions of the above embodiments, it also has the following technical features: the drive component 53 includes:

[0088] A reciprocating lead screw 530 is axially arranged in the filter chamber 502, and its top end penetrates the top wall of the buffer chamber 503 and is connected to a drive motor 531.

[0089] A reciprocating screw nut 532 is sleeved on a reciprocating screw 530, and a filter screen 51 is installed on the reciprocating screw nut 532;

[0090] Gearbox 533 is mounted on the top wall of filter chamber 502 and is used for transmission between drive assembly 53 and brush assembly 52;

[0091] Among them, the drive motor 531 and the reciprocating lead screw 530 can be driven by gears, specifically by intersecting shaft gears.

[0092] As can be seen from this embodiment, by using a reciprocating lead screw 530 and installing the filter screen 51 on the reciprocating lead screw nut 532 that cooperates with the reciprocating lead screw 530, it is convenient to drive the reciprocating lead screw 530 through the drive motor 531, thereby causing the filter screen 51 to rise and fall. During the rising process, the filtration efficiency is improved, and during the falling process, the filter screen 51 is backwashed, extending the service life of the filter screen 51 and avoiding clogging of the filter screen 51.

[0093] The gearbox 533 is designed so that the reciprocating screw 530 can drive the brush assembly 52 to move while rotating, thus cleaning the filter screen 51, further improving the cleaning effect on the surface of the filter screen 51, further extending the service life of the filter screen 51, and preventing the filter screen 51 from becoming clogged.

[0094] Example 5:

[0095] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the gearbox 533 includes:

[0096] The toothed ring 5330 is installed on the top wall of the filter chamber 502;

[0097] Sun gear 5331 is fixedly sleeved on reciprocating lead screw 530;

[0098] Multiple planetary gears 5332 are arranged around the sun gear 5331 and mesh with the gear ring 5330 and the sun gear 5331 respectively;

[0099] Planetary carrier 5333 is movably mounted on reciprocating lead screw 530 and is used to mount multiple planetary gears 5332;

[0100] The housing 5334 is connected to the top wall of the filter chamber 502 and is used to install the toothed ring 5330;

[0101] The brush assembly 52 is connected to the planetary gear 5332;

[0102] Meanwhile, the housing 5334 and the top wall of the filter chamber 502 are welded together, while the gear ring 5330 and the housing 5334 are bolted together. A cover can also be provided on the side of the gear ring 5330 away from the housing 5334. Furthermore, the planetary gear 5332 and the planet carrier 5333 are connected by bearings.

[0103] As can be seen from this embodiment, by adopting the configuration of sun gear 5331 and planetary gear 5332, the reciprocating screw 530 can rotate while the planetary gear 5332 rotates around the sun gear 5331, thereby driving the brush assembly 52 to rotate, thus cleaning the surface of the filter screen 51 and avoiding affecting the filtration efficiency. The configuration of gear ring 5330 and planetary carrier 5333 can improve the installation stability of planetary gear 5332 and ensure the stability of driving the brush assembly 52.

[0104] Example 6:

[0105] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the brush assembly 52 includes:

[0106] The bracket 520 is sleeved on the reciprocating lead screw 530 and includes a plurality of axial brush handles 521 arranged at equal intervals around the circumference;

[0107] The first bristle 522 is installed on the side of the axial brush handle 521 near the filter screen 51;

[0108] The telescopic rod 523 is connected at one end to the axial brush handle 521 and at the other end to the planetary gear 5332 bearing;

[0109] Among them, the bracket 520 abuts against the upper end face of the reciprocating screw nut 532;

[0110] Meanwhile, the telescopic rod 523 and the axial brush handle 521 can be welded together, and the structure of the telescopic rod 523 can be a multi-sleeve structure; while the number of axial brush handles 521 is the same as the number of planetary gears 5332, and in this application, both are three.

[0111] As can be seen from this embodiment, by using a bracket 520 sleeved on the reciprocating lead screw 530, and by circumferentially arranging multiple axial brush handles 521 on the bracket 520, and by connecting the multiple axial brush handles 521 to the planetary gear 5332 through the telescopic rod 523, when the planetary gear 5332 rotates around the sun gear 5331, it can drive the bracket 520 to rotate, that is, drive the axial brush handles 521 to rotate, and the bracket 520 improves the stability of the structure.

[0112] Furthermore, a telescopic rod 523 is used for connection, so that when the filter screen 51 is raised and lowered under the action of the reciprocating screw nut 532, the telescopic rod 523 can retract, thereby ensuring the raising and lowering of the filter.

[0113] Example 7:

[0114] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0115] A gap 5200 is provided between the radial inner wall of the bracket 520 and the surface of the reciprocating lead screw 530;

[0116] Among them, the bracket 520 has multiple slots 5201 that communicate with the gap 5200 on the side near the reciprocating screw nut 532;

[0117] Meanwhile, the number of slots 5201 can be eight.

[0118] As can be seen from this embodiment, by opening a gap 5200 between the surface of the bracket 520 and the reciprocating lead screw 530, and opening a slot 5201 communicating with the gap 5200 on one side near the reciprocating lead screw nut 532, the gap 5200 and the slot 5201 form a flow channel during the lifting and lowering of the filter screen 51, allowing wastewater to flow through it, achieving a lubrication effect, thereby preventing suspended matter from accumulating there, affecting the rotation of the bracket 520, avoiding affecting the energy consumption of the drive motor 531, and preventing jamming, etc., improving the smoothness of the brush assembly 52 rotation and improving the cleaning effect.

[0119] Example 8:

[0120] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the brush assembly 52 further includes:

[0121] Radial brush handle 524 is installed on the side of axial brush handle 521 away from the axis;

[0122] The second bristle 525 is installed on the side of the radial brush handle 524 near the side wall of the filter chamber 502;

[0123] The radial brush handle 524 and the axial brush handle 521 are welded together and reinforced with ribs to ensure the perpendicularity between them.

[0124] As can be seen from this embodiment, by setting the radial brush handle 524, the radial brush handle 524 can clean the inner wall of the filter chamber 502 during the rotation of the support 520, so as to prevent suspended matter from adhering to the inner wall of the filter chamber 502 and extend the cleaning cycle of the tower body 50.

[0125] Example 9:

[0126] This embodiment provides an ethyl acetate separation and recovery system based on industrial wastewater, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0127] The filter chamber 502 is also provided with a drain outlet 5020, which is located above the filter screen 51 at its lowest position, and is provided with a detachable cover 5021;

[0128] The cover 5021 can be a flange structure, which is bolted to the tower body 50 and is equipped with a sealing gasket.

[0129] As can be seen from this embodiment, the setting of the drain outlet 5020 facilitates the effective discharge of washing water carrying suspended solids and other impurities when cleaning the inside of the filter chamber 502, thereby improving cleaning efficiency and effect. The cover 5021 can seal the drain outlet 5020 during the wastewater treatment process.

[0130] Example 10:

[0131] This embodiment provides a treatment process for an ethyl acetate separation and recovery system based on industrial wastewater, including the following steps:

[0132] S1: Industrial wastewater is fed into pretreatment tower 5 to remove water-insoluble suspended impurities from the industrial wastewater.

[0133] S2: The pretreated industrial wastewater enters the distillation tower 1 through the transfer pump 6 for distillation, and separates ethyl acetate and ethanol, which are then condensed to form a mixture.

[0134] S3: Pass the mixture of ethyl acetate and ethanol into the separation tank 7, and then let it stand after passing water through it.

[0135] S4: Multiple layered tanks 7 sequentially complete the above S3;

[0136] S5: Repeat S1-S4.

[0137] As can be seen from this embodiment, the above-described treatment process can continuously treat industrial wastewater, effectively separate and recover ethyl acetate from the industrial wastewater, and achieve high treatment efficiency.

[0138] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An ethyl acetate separation and recovery system based on industrial wastewater, characterized in that, include: A distillation column (1) is provided, with a condenser (2) connected to the top of the column and a reboiler (3) connected to the bottom of the column, and a first liquid inlet (4) is provided. The pretreatment tower (5) is connected to the first inlet (4) of the distillation tower (1) and is connected to the distillation tower (1) by a transfer pump (6) for filtering industrial wastewater. The stratified tank (7) is provided with a delivery pipe (8) connected to the output end of the condenser (2) and a water injection pipe (9). Multiple stratified tanks (7) are provided. The conveying pipe (8) and the water injection pipe (9) are both equipped with valves (10) on one side of the layered tank (7), and water is injected into the layered tank (7) through the water injection pipe (9); The pretreatment tower (5) includes: The tower body (50) has a second liquid inlet (500) and a liquid outlet (501), and the liquid outlet (501) is connected to the delivery pump (6), and a filter chamber (502) and a buffer chamber (503) are formed inside it. A filter screen (51) is installed inside a filter chamber (502), and a second liquid inlet (500) is located above the filter screen (51); A brush assembly (52) is mounted on a filter screen (51) and is used for cleaning the surface of the filter screen (51); The drive assembly (53) is mounted on the top wall of the filter chamber (502); The filter chamber (502) and the buffer chamber (503) are provided with a liquid outlet (504) and a feed inlet (505) is provided on the filter chamber (502). The filter screen (51) is raised and lowered, and the drive assembly (53) is used to drive the filter screen (51) to rise and fall and the brush assembly (52) to move. The driving component (53) includes: A reciprocating lead screw (530) is axially arranged in the filter chamber (502), and its top end passes through the top wall of the buffer chamber (503) and is connected to a drive motor (531). A reciprocating screw nut (532) is fitted onto a reciprocating screw (530), and a filter screen (51) is installed on the reciprocating screw nut (532); A gearbox (533) is mounted on the top wall of the filter chamber (502) and is used for transmission between the drive assembly (53) and the brush assembly (52); The gearbox (533) includes: A toothed ring (5330) is installed on the top wall of the filter chamber (502); The sun gear (5331) is fixedly sleeved on the reciprocating lead screw (530); Planetary gears (5332) are arranged in multiple ways around the sun gear (5331) and mesh with the gear ring (5330) and the sun gear (5331) respectively; The planetary carrier (5333) is movably mounted on the reciprocating lead screw (530) and is used to mount multiple planetary gears (5332). The housing (5334) is connected to the top wall of the filter chamber (502) and is used to install the toothed ring (5330). The brush assembly (52) is connected to the planetary gear (5332); The brush assembly (52) includes: The bracket (520) is sleeved on the reciprocating lead screw (530) and includes a plurality of axial brush handles (521) arranged at equal intervals around the circumference. The first bristle (522) is installed on the side of the axial brush handle (521) near the filter screen (51); The telescopic rod (523) is connected at one end to the axial brush handle (521) and at the other end to the planetary gear (5332) bearing; The bracket (520) abuts against the upper end face of the reciprocating lead screw nut (532); A gap (5200) is provided between the radial inner wall of the bracket (520) and the surface of the reciprocating screw (530). The bracket (520) has multiple slots (5201) on the side near the reciprocating screw nut (532) that communicate with the gap (5200).

2. The ethyl acetate separation and recovery system based on industrial wastewater according to claim 1, characterized in that, The brush assembly (52) further includes: A radial brush handle (524) is mounted on the side of the axial brush handle (521) away from the axis; The second bristle (525) is installed on the side of the radial brush handle (524) near the side wall of the filter chamber (502).

3. The ethyl acetate separation and recovery system based on industrial wastewater according to claim 1, characterized in that: The filter chamber (502) is also provided with a drain outlet (5020), which is located above the filter screen (51) at its lowest position, and is detachably provided with a cover (5021).

4. A treatment process applied to the ethyl acetate separation and recovery system based on industrial wastewater as described in claim 1, characterized in that, Includes the following steps: S1: Industrial wastewater is fed into the pretreatment tower (5) to remove water-insoluble suspended impurities from the industrial wastewater. S2: The pretreated industrial wastewater enters the distillation tower (1) through the transfer pump (6) for distillation, and separates ethyl acetate and ethanol, which are then condensed to form a mixture; S3: Pass the mixture of ethyl acetate and ethanol into the separation tank (7) respectively, and then let it stand after passing water through it; S4: Multiple layered tanks (7) sequentially complete the above S3; S5: Repeat S1-S4.

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