Waste isopropyl acetate solution purification and recovery equipment and operation method thereof

Abstract

The invention discloses waste isopropyl acetate solution purification and recovery equipment and an operation method thereof, and belongs to the technical field of chemical waste liquid treatment.The waste isopropyl acetate solution purification and recovery equipment comprises a base and a filtering mechanism arranged on the base and used for filtering a waste isopropyl acetate solution, and the filtering mechanism comprises a filtering box, a liquid inlet pipe and a filtering part; the filter box is fixedly arranged on the top of the outer wall of the base, and the liquid inlet pipe is fixedly embedded in the top of the outer wall of the filter box. According to the waste isopropyl acetate solution purification and recovery equipment and the operation method thereof, large-particle impurities are preliminarily filtered through the first filter assembly, small-particle impurities are further filtered through the second filter assembly, double filtration is achieved, the purity of the solution is improved, interference of the impurities on the subsequent pH value adjustment and purification and recovery processes is reduced, and meanwhile, the purification and recovery efficiency of the waste isopropyl acetate solution is improved. The driving assembly enables the filtering part to rotate intermittently, multiple filtering plates, filtering nets and filtering cloth can be circularly switched, impurities are dispersed to the surfaces of the different filtering plates, the service life of the single filtering plate is prolonged, and the filtering efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical waste liquid treatment, and particularly relates to a waste isopropyl acetate solution purification and recovery equipment and an operation method thereof. BACKGROUND

[0002] Isopropyl acetate is an important organic solvent and chemical intermediate, and is widely used in many industries such as coatings, inks, medicines and spices. However, a large amount of waste isopropyl acetate solution is inevitably produced in the production and use of isopropyl acetate. The waste liquid contains not only unreacted raw materials and reaction by-products, but also various impurities such as solid particles, heavy metal ions and other organic matters. If the waste liquid is directly discharged, not only the resources will be wasted, but also the environment will be seriously polluted, which will harm the ecological balance and human health.

[0003] Before the existing waste isopropyl acetate solution purification and recovery, the waste liquid is filtered and the pH value is adjusted. In the filtering process, a single filtering structure is usually used, and the filtering effect is limited. The impurities will be concentrated and accumulated on the surface of the filter plate, causing rapid plugging of the local pores and affecting the filtering effect. In terms of adjusting the pH value of the waste liquid, only a simple stirring method is used, which causes uneven stirring and insufficient mixing of the acid or alkali liquid with the waste liquid, resulting in inaccurate and incomplete pH value adjustment, which is difficult to meet the accurate requirements of the subsequent process on the pH value of the solution, affects the purification and recovery effect, and the detection component can only detect the pH value of the solution at a fixed position, and cannot obtain the pH value information of the solution at different depths and directions. SUMMARY

[0004] The application aims at: through the first filter assembly, the second filter assembly, the double filtration, the purity of the solution is improved, the interference of the impurities on the subsequent pH value adjustment and purification recovery process is reduced, meanwhile, the driving assembly makes the filter components rotate intermittently, the multiple filter plates, filter screens and filter cloths can be switched cyclically, the impurities are dispersed to the surfaces of the different filter plates, the service life of the single filter plate is prolonged, the filtration efficiency is improved, the impurities are effectively prevented from being concentrated and accumulated on the surface of the filter plate, the local pore is prevented from being rapidly blocked, the filtration efficiency is affected, the pH value of the waste isopropyl acetate solution can be adjusted through the adjusting component in the adjusting box, the stirring component is driven through the complex gear transmission structure, the stirring rod revolves around the rotating shaft while revolving around the rotating shaft, the stirring direction of the stirring rod is changed constantly, the acid solution or the alkali solution is uniformly mixed with the waste liquid, the efficiency and the uniformity of the pH value adjustment are improved, the pH value of the solution at different depths and different directions in the adjusting box can be detected in real time through the detection component, the one-sidedness of the single fixed position detection is avoided, the local over-acid or over-alkali of the solution in the adjusting box is effectively prevented, the pH value of the whole solution system is uniformly and stably ensured, the various impurities in the solution can be removed gradually through the purification recovery mechanism adopting the combination of multiple processes such as rectification, extraction, osmotic evaporation and esterification, the high-purity recovery of the isopropyl acetate is realized, and the resource utilization rate is improved.

[0005] The technical scheme adopted by the application is as follows: a waste isopropyl acetate solution purification recovery equipment comprises: a base; a filtering mechanism arranged on the base and used for filtering the waste isopropyl acetate solution, wherein the filtering mechanism comprises a filtering box, a liquid inlet pipe and a filtering component, the filtering box is fixedly arranged on the top of the outer wall of the base, the liquid inlet pipe is fixedly embedded on the top of the outer wall of the filtering box, and the filtering component is arranged in the filtering box; an adjusting mechanism arranged on the base and used for adjusting the pH value of the waste isopropyl acetate solution, wherein the adjusting mechanism comprises an adjusting box, an adjusting component, a stirring component and a detection component, the adjusting box is mounted on the top of the outer wall of the base, the stirring component is arranged on the adjusting box, and the detection component is arranged on the stirring component; a purification recovery mechanism arranged on the base and used for purifying the waste isopropyl acetate solution.

[0006] The filtering component comprises a mounting cylinder, a connecting pipe, a first filter assembly, a second filter assembly and a driving assembly, the mounting cylinder is rotatably embedded on the inner wall of the filtering box, the connecting pipe is fixedly embedded on one side of the inner wall of the filtering box, the first filter assembly is arranged on the mounting cylinder, the second filter assembly is arranged in the mounting cylinder, the driving assembly is arranged on the filtering box, and one end of the connecting pipe is mounted on one side of the outer wall of the adjusting box.

[0007] The first filter assembly comprises a plurality of partitions, a plurality of filter plates and a plurality of feed holes, each of the partitions is fixedly arranged on the outer wall of the mounting cylinder at equal intervals in the circumferential direction, each of the filter plates is fixedly arranged between every two partitions, and each of the feed holes is formed on the outer wall of the mounting cylinder at equal intervals in the circumferential direction.

[0008] The second filter assembly comprises a placing cylinder, a plurality of filter screens and a plurality of filter cloths, the placing cylinder is threadedly connected to the inner wall of the mounting cylinder, each of the filter screens is fixedly embedded on the outer wall of the placing cylinder at equal intervals in the circumferential direction, and each of the filter cloths is fixedly arranged on the top of the outer wall of the filter screen.

[0009] The driving assembly comprises a servo motor, a grooved wheel, a driving dial and a cylindrical pin, the servo motor is mounted on one side of the outer wall of the filter box through bolts, the driving dial is fixedly sleeved on the outer wall of the servo motor, the grooved wheel is fixedly sleeved on the outer wall of the mounting cylinder, the cylindrical pin is fixedly arranged on one side of the outer wall of the driving dial close to the edge, the cylindrical pin is slidably embedded in the inner wall of the grooved wheel, the inner wall of the filter box is fixedly provided with an inclined mesh plate, one side of the inner wall of the filter box close to the bottom edge is fixedly provided with a circulating pipe, the top of the outer wall of the base is provided with a liquid pumping pump, the input end of the liquid pumping pump is connected with the circulating pipe, and the output end of the liquid pumping pump is connected with the liquid inlet pipe through a pipeline.

[0010] The adjusting component comprises an acid liquid storage tank, an alkali liquid storage tank, two adjusting pipes and two metering pumps, the acid liquid storage tank is mounted on the top of the outer wall of the adjusting box, the alkali liquid storage tank is mounted on the top of the outer wall of the adjusting box, one of the metering pumps is mounted on the output end of the acid liquid storage tank, and the other metering pump is mounted on the output end of the alkali liquid storage tank, one end of each of the adjusting pipes is fixedly embedded on one side of the outer wall of the adjusting box, and each of the adjusting pipes is connected with the metering pump.

[0011] The stirring part comprises a reversible motor, a rotating shaft, a mounting plate, a first gear, a plurality of connecting shafts, a plurality of second gears, a plurality of movable racks, a plurality of stirring rods, a plurality of third gears and a plurality of internal gears, the reversible motor is installed on the top of the outer wall of the adjusting box by bolts, the rotating shaft is fixedly arranged on the output end of the reversible motor, the mounting plate is fixedly arranged on the bottom of the outer wall of the rotating shaft, the first gear is fixedly arranged on the top of the outer wall of the adjusting box, each connecting shaft is rotatably embedded on the top of the outer wall of the mounting plate, each second gear is fixedly sleeved on the outer wall of the connecting shaft, each movable rack is rotatably embedded on the top of the outer wall of the mounting plate, each stirring rod is rotatably embedded on the top of the outer wall of the movable rack near one side edge, each third gear is fixedly sleeved on the outer wall of the stirring rod, each internal gear is fixedly arranged on the bottom of the outer wall of the mounting plate, and each internal gear is engaged with the third gear, each second gear is engaged with the first gear, and each third gear is engaged with the second gear.

[0012] The detection part comprises a mounting frame, a lead screw, a moving frame, an external gear and a pH sensor, the mounting frame is fixedly arranged on the bottom of the outer wall of one movable rack, the lead screw is rotatably embedded in the inner wall of the mounting frame and movably penetrates through the top of the outer wall of the movable rack, the external gear is fixedly sleeved on the outer wall of the lead screw and engaged with the internal gear, the moving frame is slidably embedded in the inner wall of the mounting frame, each moving frame is threadedly connected to the outer wall of the lead screw, and the pH sensor is mounted on the inner wall of the moving frame.

[0013] The purification and recovery mechanism comprises a rectifying tower, an extraction tank, a permeation evaporation device and an esterification tower, the rectifying tower, the extraction tank, the permeation evaporation device and the esterification tower are all mounted on the top of the outer wall of the base, the input end of the rectifying tower is connected with the output end of the adjusting box through a pipeline, the input end of the extraction tank is connected with the output end of the rectifying tower through a pipeline, the input end of the permeation evaporation device is connected with the output end of the extraction tank through a pipeline, and the input end of the esterification tower is connected with the output end of the permeation evaporation device through a pipeline.

[0014] A use method of the waste isopropyl acetate solution purification and recovery equipment, comprising the following steps: Step one: filter waste liquid: the waste isopropyl acetate solution is introduced into the filter box through the inlet pipe, the waste liquid enters between the two partitions, the larger particles are filtered out through the filter plate, then enters the installation cylinder through the feed hole, the waste liquid is further filtered through the filter cloth and filter screen to make the filtered solution more pure, the filtered solution is transported to the adjusting box through the connecting pipe, and a servo motor is started every interval, the servo motor drives the driving dial to rotate, the cylindrical pin on the driving dial drives the groove wheel, so that the intermittent rotation of the installation cylinder is realized, the filter plates, filter screens and filter cloths are changed in turn, and the filter plates at the bottom of the installation cylinder can dump the large particles filtered out on the inclined mesh plate, so that the particles and the waste liquid are separated, and the waste liquid at the bottom of the filter box is transported to the inlet pipe through the circulating pump and the pipeline, and is filtered again in the filter box, so that the waste liquid is filtered in a circulating manner. Step two: adjust the pH value of the waste liquid: according to the initial pH value of the waste liquid, the amount of acid or alkali added into the acid liquid storage tank or the alkali liquid storage tank is accurately controlled through the metering pump, the acid or alkali is transported to the adjusting box through the adjusting pipe, the forward and reverse motor is started, the forward and reverse motor drives the rotating shaft to rotate, and then drives the mounting plate, connecting shaft, movable frame and stirring rod to rotate, at the same time, the connecting shaft drives the movable frame to rotate due to the meshing relationship between the first gear and the second gear, the position of the stirring rod and the pH sensor is switched, and then the stirring rod is rotated around the sun while rotating around itself due to the meshing relationship between the third gear and the internal gear, so that the solution in the adjusting box is fully stirred, and the meshing between the internal gear and the external gear enables the external gear to drive the lead screw to rotate in the mounting frame, and then drives the moving frame and the pH sensor to move up and down, so that the pH value of the solution at different depths and different positions in the adjusting box is detected in real time, the one-sidedness of single fixed position detection is avoided, and the accuracy and comprehensiveness of the pH value adjustment are improved. Step three: waste liquid purification and recovery: the solution with adjusted pH value is transported to the rectifying column through the pipeline, is preliminarily purified to remove part of the impurities and water, the rectified solution is transported to the extraction tank through the pipeline, the useful components in the solution are further purified by using the extractant, the extracted solution is transported to the osmotic evaporation device through the pipeline, trace impurities and water in the solution are removed through the osmotic evaporation principle, the purity of the solution is improved, finally, the purified solution is transported to the esterification tower through the pipeline, esterification is carried out, and high-purity isopropyl acetate product is generated, so that the waste isopropyl acetate solution is purified and recovered.

[0015] In summary, due to the adoption of the above technical scheme, the application has the following beneficial effects: (1) In the application, the first filter assembly preliminarily filters large particle impurities, and the second filter assembly further filters small particle impurities, so that double filtration is realized, the purity of the solution is improved, and the interference of impurities on subsequent pH value adjustment and purification recovery processes is reduced. Meanwhile, the driving assembly makes the filter components rotate intermittently, can cyclically switch a plurality of filter plates, filter screens and filter cloths, disperses impurities to different filter plate surfaces, prolongs the service life of a single filter plate, improves the filtration efficiency, effectively avoids the rapid clogging of local pores due to the accumulation of impurities on the filter plate surface, and affects the filtration efficiency.

[0016] (2) In the application, the adjusting component in the adjusting box can adjust the pH value of the waste isopropyl acetate solution. The stirring component makes the stirring rod revolve around the rotation axis while rotating by the complex gear transmission structure, and the stirring direction of the stirring rod changes constantly, so that the acid solution or alkali solution is quickly and uniformly mixed with the waste liquid, the efficiency and uniformity of the pH value adjustment are improved, the detection component can detect the pH value of the solution at different depths and different directions in the adjusting box in real time, the one-sidedness of single fixed position detection is avoided, the local over-acidification or over-alkalization of the solution in the adjusting box is effectively prevented, and the pH value of the whole solution system is uniformly and stably ensured.

[0017] (3) In the application, the purification recovery mechanism adopts the combination of multiple processes such as rectification, extraction, osmotic evaporation and esterification, can gradually remove various impurities in the solution, realizes the high-purity recovery of isopropyl acetate, and improves the resource utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the application; Figure 2 is a sectional view of the filter box of the application; Figure 3 is a sectional view of the filter mechanism of the application; Figure 4 is a partial exploded view of the filter mechanism of the application; Figure 5 is a sectional view of the adjusting box of the application; Figure 6 is a sectional view of the mounting plate of the application; Figure 7 is an exploded view of the adjusting mechanism of the application; Figure 8 is a sectional view of the mounting frame of the application.

[0019] Marked in the figure: 1, base; 2, filtering mechanism; 201, filter box; 202, liquid inlet pipe; 203, mounting cylinder; 204, connecting pipe; 205, partition; 206, filter plate; 207, feeding hole; 208, placing cylinder; 209, filter screen; 210, filter cloth; 211, servo motor; 212, grooved wheel; 213, driving dial; 214, cylindrical pin; 3, adjusting mechanism; 301, adjusting box; 302, acid liquid storage box; 303, alkali liquid storage box; 304, adjusting pipe; 305, metering pump; 306, forward and reverse motor; 307, rotating shaft; 308, mounting plate; 309, first gear; 310, connecting shaft; 311, second gear; 312, movable frame; 313, stirring rod; 314, third gear; 315, inner gear; 316, mounting frame; 317, screw rod; 318, moving frame; 319, outer gear; 320, pH sensor; 4, purification and recovery mechanism; 401, rectifying column; 402, extraction tank; 403, osmotic evaporation device; 404, esterification tower; 5, inclined mesh plate; 6, circulating pipe; 7, liquid pumping pump. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0021] Example one, refer to Figures 1-8 A waste isopropyl acetate solution purification and recovery equipment, comprising: a base 1; a filtering mechanism 2 arranged on the base 1, which is used for filtering the waste isopropyl acetate solution, the filtering mechanism 2 comprising a filter box 201, a liquid inlet pipe 202 and a filtering component, the filter box 201 being fixedly arranged at the top of the outer wall of the base 1, the liquid inlet pipe 202 being fixedly embedded at the top of the outer wall of the filter box 201, and the filtering component being arranged in the filter box 201; an adjusting mechanism 3 arranged on the base 1, which is used for adjusting the pH value of the waste isopropyl acetate solution, the adjusting mechanism 3 comprising an adjusting box 301, an adjusting component, a stirring component and a detecting component, the adjusting box 301 being mounted on the top of the outer wall of the base 1, the stirring component being arranged on the adjusting box 301, and the detecting component being arranged on the stirring component; a purification and recovery mechanism 4 arranged on the base 1, which is used for purifying the waste isopropyl acetate solution.

[0022] In the embodiment, the base 1 serves as the support base of the whole device, the multi-stage filtering structure of the filtering mechanism 2 can effectively remove the solid impurities and suspended solids in the waste isopropyl acetate solution, improve the purity of the solution, and provide a good basis for the subsequent process, the waste isopropyl acetate solution enters the filtering box 201 through the liquid inlet pipe 202, and the solution is filtered by the filtering component, the adding amount of the acid or alkali solution is controlled by the adjusting mechanism 3, the pH value of the solution can be adjusted in real time and accurately by combining the complex stirring and detection structure, the solution is ensured to be in the optimal reaction condition, the pH value of the waste isopropyl acetate solution can be adjusted by the adjusting component in the adjusting box 301, the acid or alkali solution and the waste liquid are rapidly and uniformly mixed by the stirring component, the detection component can detect the pH value of the solution at different depths, and the accuracy and comprehensiveness of the pH value adjustment are improved, and the high-purity isopropyl acetate can be recovered by gradually removing various impurities in the solution by the purification and recovery mechanism 4 in combination with multiple processes such as rectification, extraction, pervaporation and esterification, and the resource utilization rate is improved.

[0023] Specifically, the filtering component comprises a mounting cylinder 203, a connecting pipe 204, a first filtering assembly, a second filtering assembly and a driving assembly, the mounting cylinder 203 is rotationally embedded in the inner wall of the filtering box 201, the connecting pipe 204 is fixedly embedded in one side of the inner wall of the filtering box 201, the first filtering assembly is arranged on the mounting cylinder 203, the second filtering assembly is arranged in the mounting cylinder 203, and the driving assembly is arranged on the filtering box 201.

[0024] In the embodiment, the mounting cylinder 203 is the mounting carrier of the first filtering assembly and the second filtering assembly, the outer wall of the connecting pipe 204 is provided with a liquid inlet hole at the top, the filtered solution can be transported to the adjusting box 301, the first filtering assembly can preliminarily filter the larger particle impurities, the second filtering assembly can further filter the smaller particle impurities, and the filtering component can be intermittently rotated by the driving assembly, so that the filtering effect is improved, the solid particles in the waste liquid are effectively removed, and a good basis is provided for the subsequent pH value adjustment and purification and recovery process, and the connecting pipe 204 is provided with a delivery pump, so that the filtered waste liquid can be transported into the adjusting box 301.

[0025] Specifically, the first filtering assembly comprises a plurality of partitions 205, a plurality of filter plates 206 and a plurality of feed holes 207, each partition 205 is fixedly arranged on the outer wall of the mounting cylinder 203 at equal intervals in the circumferential direction, each filter plate 206 is fixedly arranged between every two partitions 205, and each feed hole 207 is formed in the outer wall of the mounting cylinder 203 at equal intervals in the circumferential direction.

[0026] In the embodiment, the partition plates 205 separate and support the filter plates 206, and the independent space formed between every two partition plates 205 facilitates the circulation switching between the filter plates 206, preliminarily filters the large particle impurities in the waste liquid, effectively avoids the particle impurities from accumulating on one filter plate 206, affects the filtering efficiency, increases the filtering load of the filter plate 206, affects the service life of the filter plate 206, causes the filtering failure, and enables the filtered waste liquid to enter the installation cylinder 203 to be further filtered through the feed hole 207.

[0027] Specifically, the second filtering assembly includes a placing cylinder 208, a plurality of filter screens 209 and a plurality of filter cloths 210. The placing cylinder 208 is threadedly connected to the inner wall of the installation cylinder 203. Each filter screen 209 is fixedly embedded on the outer wall of the placing cylinder 208 at equal intervals in the circumferential direction. Each filter cloth 210 is fixedly arranged on the top of the outer wall of the filter screen 209.

[0028] In the embodiment, the placing cylinder 208 is threadedly connected with the installation cylinder 203, so as to facilitate the disassembly and replacement of the placing cylinder 208. The connection between the placing cylinder 208 and the installation cylinder 203 is provided with a sealing ring, which plays a sealing role. The filter screens 209 are embedded on the placing cylinder 208, which can further filter the fine particles in the waste liquid and support the filter cloths 210. The fine particle impurities filtered by the filter cloths 210 are prevented from accumulating on the filter cloths 210, which has a tendency to sag under the influence of gravity, thereby affecting the rotation of the placing cylinder 208 on the surface of the connecting pipe 204. The filter cloths 210 further filter the fine particle impurities, improve the purity of the solution, and provide a good basis for the subsequent pH value adjustment and purification and recovery processes.

[0029] Specifically, the driving assembly includes a servo motor 211, a grooved wheel 212, a driving dial 213 and a cylindrical pin 214. The servo motor 211 is mounted on one side of the outer wall of the filter box 201 by bolts. The driving dial 213 is fixedly sleeved on the outer wall of the servo motor 211. The grooved wheel 212 is fixedly sleeved on the outer wall of the installation cylinder 203. The cylindrical pin 214 is fixedly arranged on one side of the outer wall of the driving dial 213 near the edge. The cylindrical pin 214 is slidingly embedded in the inner wall of the grooved wheel 212. The inner wall of the filter box 201 is fixedly provided with an inclined mesh plate 5. One side of the inner wall of the filter box 201 near the bottom edge is fixedly provided with a circulating pipe 6. The outer wall of the base 1 is provided with a liquid pump 7 on the top. The input end of the liquid pump 7 is connected with the circulating pipe 6, and the output end of the liquid pump 7 is connected with the liquid inlet pipe 202 through a pipeline.

[0030] In the embodiment: the servo motor 211 drives the main dial 213 to rotate, and the cylindrical pin 214 on the main dial 213 drives the grooved wheel 212, thereby realizing the intermittent rotation of the mounting cylinder 203, switching the plurality of filter plates 206, the plurality of filter screens 209 and the plurality of filter cloths 210 back and forth, dispersing impurities to the surfaces of different filter plates 206, prolonging the service life of a single filter plate 206, maintaining the overall filtering efficiency, effectively avoiding the concentration of impurities on the surface of the filter plate 206, causing local pores to be quickly blocked, affecting the filtering efficiency, also increasing the filtering load of the filter plate 206, affecting the service life of the filter plate 206, the filter plate 206 at the bottom of the mounting cylinder 203 will dump large particles of impurities filtered on the inclined mesh plate 5, realizing the separation of particles and waste liquid, and the waste liquid at the bottom of the filter box 201 is transported into the liquid inlet pipe 202 under the action of the liquid pump 7, through the circulation pipe 6 and the pipeline, and then filtered in the filter box 201 again, realizing the circulation filtering.

[0031] Specifically, the adjusting component includes an acid liquid storage tank 302, an alkali liquid storage tank 303, two adjusting pipes 304 and two metering pumps 305. The acid liquid storage tank 302 is installed on the top of the outer wall of the adjusting tank 301, and the alkali liquid storage tank 303 is installed on the top of the outer wall of the adjusting tank 301. One of the metering pumps 305 is installed on the output end of the acid liquid storage tank 302, and the other metering pump 305 is installed on the output end of the alkali liquid storage tank 303. One end of each adjusting pipe 304 is fixedly embedded on one side of the outer wall of the adjusting tank 301, and each adjusting pipe 304 is connected with the metering pump 305.

[0032] In the embodiment: the acid liquid storage tank 302 and the alkali liquid storage tank 303 respectively store acid liquid and alkali liquid, and through the metering pump 305, the addition amount of the acid liquid or the alkali liquid is accurately controlled. Through the two adjusting pipes 304, the acid liquid or the alkali liquid can be delivered into the adjusting tank 301, and the addition amount of the acid liquid or the alkali liquid is accurately controlled through the metering pump 305, so as to realize the adjustment of the pH value of the waste isopropyl acetate solution.

[0033] Specifically, the stirring component comprises a reversible motor 306, a rotating shaft 307, a mounting plate 308, a first gear 309, a plurality of connecting shafts 310, a plurality of second gears 311, a plurality of movable frames 312, a plurality of stirring rods 313, a plurality of third gears 314 and a plurality of internal gears 315, the reversible motor 306 is mounted on the top of the outer wall of the adjusting box 301 by bolts, the rotating shaft 307 is fixedly arranged at the output end of the reversible motor 306, the mounting plate 308 is fixedly arranged at the bottom of the outer wall of the rotating shaft 307, the first gear 309 is fixedly arranged at the top of the outer wall of the adjusting box 301, each connecting shaft 310 is rotatably embedded at the top of the outer wall of the mounting plate 308, each second gear 311 is fixedly sleeved on the outer wall of the connecting shaft 310, each movable frame 312 is rotatably embedded at the top of the outer wall of the mounting plate 308, each stirring rod 313 is rotatably embedded at the top of the outer wall of the movable frame 312 near one side edge, each third gear 314 is fixedly sleeved on the outer wall of the stirring rod 313, and each internal gear 315 is fixedly arranged at the bottom of the outer wall of the mounting plate 308, and each internal gear 315 is engaged with the third gear 314, each second gear 311 is engaged with the first gear 309, and each third gear 314 is engaged with the second gear 311.

[0034] In the embodiment, the reversible motor 306 provides power for the stirring process, the rotating shaft 307 is driven to rotate by the reversible motor 306, and then the mounting plate 308, the connecting shaft 310, the movable frame 312 and the stirring rod 313 are driven to rotate, at the same time, the connecting shaft 310 drives the movable frame 312 to rotate due to the engagement relationship between the first gear 309 and the second gear 311, the positions of the stirring rod 313 and the pH sensor 320 are switched, and then the stirring rod 313 rotates around the sun while rotating around itself due to the engagement relationship between the third gear 314 and the internal gear 315, so that the solution in the adjusting box 301 is fully stirred, the stirring efficiency is improved, and the pH value adjusting speed is accelerated.

[0035] Specifically, the detection component comprises a mounting frame 316, a lead screw 317, a moving frame 318, an external gear 319 and a pH sensor 320, the mounting frame 316 is fixedly arranged at the bottom of the outer wall of one of the movable frames 312, the lead screw 317 is rotatably embedded in the inner wall of the mounting frame 316 and movably penetrates through the top of the outer wall of the movable frame 312, the external gear 319 is fixedly sleeved on the outer wall of the lead screw 317 and engaged with the internal gear 315, the moving frame 318 is slidably embedded in the inner wall of the mounting frame 316, each moving frame 318 is threadedly connected to the outer wall of the lead screw 317, and the pH sensor 320 is mounted on the inner wall of the moving frame 318.

[0036] In the embodiment, the inner gear 315 meshes with the outer gear 319 during stirring, so that the outer gear 319 drives the lead screw 317 to rotate in the mounting frame 316, and in turn drives the moving frame 318 and the pH sensor 320 to move up and down, so as to realize real-time detection of the pH values of solutions at different depths in the adjusting tank 301, improve the accuracy of detection, and provide stereoscopic data support for process adjustment by tracking the pH gradient in real time, avoiding one-sidedness of single fixed position detection, and at the same time, the connecting shaft 310 drives the movable frame 312 to rotate, so as to switch the positions of the stirring rod 313 and the pH sensor 320, so as to facilitate the pH sensor 320 to perform real-time monitoring on the pH values of solutions at different positions in the adjusting tank 301. During stirring, the pH sensor 320 can detect the pH difference between the central region and the edge region, so as to avoid local over-acidification or over-alkalization, and through multi-directional detection, the stirring effect can be verified, and the pH sensor 320 at a fixed position can only reflect local pH values, and cannot capture the pH distribution difference caused by stratification or uneven stirring in the solution, which is easy to cause process control deviation.

[0037] Specifically, the purification and recovery mechanism 4 includes a rectifying tower 401, an extraction tank 402, a pervaporation device 403, and an esterification tower 404, all of which are installed on the top of the outer wall of the base 1. The input end of the rectifying tower 401 is connected to the output end of the adjusting tank 301 through a pipeline, the input end of the extraction tank 402 is connected to the output end of the rectifying tower 401 through a pipeline, the input end of the pervaporation device 403 is connected to the output end of the extraction tank 402 through a pipeline, and the input end of the esterification tower 404 is connected to the output end of the pervaporation device 403 through a pipeline.

[0038] In the embodiment, the purification and recovery mechanism 4 uses the rectifying tower 401 to preliminarily separate different substances according to their boiling point differences, removes part of low-boiling and high-boiling impurities, uses the extraction tank 402 to further separate impurities through selective dissolution of the extraction agent to isopropyl acetate, uses the pervaporation device 403 to separate isopropyl acetate and water through the selective permeation performance of the membrane, and uses the esterification tower 404 to convert a small amount of possible impurities into substances that are easy to separate through esterification reaction, so as to finally obtain high-purity isopropyl acetate products, realize efficient recovery and resource reuse of waste isopropyl acetate solution, and realize efficient recovery and resource reuse of waste isopropyl acetate solution. The power sources of the rectifying tower 401, the extraction tank 402, the pervaporation device 403, and the esterification tower 404, the pH sensor 320, the forward and reverse motor 306, the metering pump 305, and the servo motor 211 are derived from an external power supply, which should be electrically connected to the external power supply. The internal circuit principle structure belongs to the common knowledge of those skilled in the art, and will not be described in detail here. The model can be selected according to the actual use.

[0039] In use, step one: filter waste liquid: the waste isopropyl acetate solution is introduced into the filter box 201 through the inlet pipe 202, the waste liquid enters between the two partitions 205, the larger particles are filtered out through the filter plate 206, then enters the inside of the installation cylinder 203 through the feed hole 207, the waste liquid is further filtered through the filter cloth 210 and the filter screen 209 to remove small particles, so that the filtered solution is more pure, the filtered solution is transported to the adjusting box 301 through the connecting pipe 204, and a servo motor 211 is started every interval to rotate the driving dial 213, the cylindrical pin 214 on the driving dial 213 drives the groove wheel 212 to rotate, so that the intermittent rotation of the installation cylinder 203 is realized, and the multiple filter plates 206, multiple filter screens 209 and multiple filter cloths 210 are sequentially replaced, the filter plate 206 at the bottom of the installation cylinder 203 will dump the large particles filtered out on the inclined mesh plate 5 to realize the separation of particles and waste liquid, and the waste liquid at the bottom of the filter box 201 is transported to the inlet pipe 202 through the circulating pipe 6 and the pipeline under the action of the liquid pump 7 to be filtered again in the filter box 201, realizing circulating filtration, step two: adjust the pH value of the waste liquid: according to the initial pH value of the waste liquid, the amount of acid or alkali added in the acid liquid storage box 302 or the alkali liquid storage box 303 is accurately controlled through the metering pump 305, the acid or alkali is transported to the adjusting box 301 through the adjusting pipe 304, the forward and reverse motor 306 is started, the rotating shaft 307 is driven to rotate by the forward and reverse motor 306, and then the mounting plate 308, the connecting shaft 310, the movable frame 312 and the stirring rod 313 are driven to rotate, at the same time, the connecting shaft 310 drives the movable frame 312 to rotate due to the meshing relationship between the first gear 309 and the second gear 311, the position of the stirring rod 313 and the pH sensor 320 is switched, and then the stirring rod 313 is rotated while revolving due to the meshing relationship between the third gear 314 and the internal gear 315, so that the solution in the adjusting box 301 is fully stirred, in the stirring process, the internal gear 315 meshes with the external gear 319, so that the external gear 319 drives the lead screw 317 to rotate in the mounting frame 316, and then drives the moving frame 318 and the pH sensor 320 to move up and down, the pH value of the solution in the adjusting box 301 at different depths and different directions is monitored in real time, the one-sidedness of single fixed position detection is avoided, and the accuracy and comprehensiveness of the pH value adjustment are improved, step three: waste liquid purification and recovery: the solution with adjusted pH value is transported to the rectifying column 401 through the pipeline for preliminary purification to remove part of the impurities and water, the rectified solution is transported to the extraction tank 402 through the pipeline, the useful components in the solution are further purified by using the extractant, the extracted solution is transported to the osmotic evaporation device 403 through the pipeline, trace impurities and water in the solution are removed through the principle of osmotic evaporation to improve the purity of the solution, finally, the purified solution is transported to the esterification tower 404 through the pipeline for esterification reaction to generate high-purity isopropyl acetate product, and the purification and recovery of the waste isopropyl acetate solution are realized.

[0040] The above merely provides the preferred embodiments of the application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall fall in the protected scope of the present application.

Claims

1. A purification and recovery device for waste isopropyl acetate solution, characterized in that, Include: Base (1); Filter mechanism (2), provided on the base (1), for filtering waste isopropyl acetate solution, the filter mechanism (2) includes filter box (201), liquid inlet pipe (202) and filter component, the filter box (201) is fixedly arranged on the top of the outer wall of the base (1), the liquid inlet pipe (202) is fixedly embedded on the top of the outer wall of the filter box (201), the filter component is arranged in the filter box (201); Adjusting mechanism (3), provided on the base (1), for adjusting the pH value of waste isopropyl acetate solution, the adjusting mechanism (3) includes adjusting box (301), adjusting component, stirring component and detection component, the adjusting box (301) is installed on the top of the outer wall of the base (1), the stirring component is arranged on the adjusting box (301), the detection component is arranged on the stirring component; Purification and recovery mechanism (4), provided on the base (1), for purifying waste isopropyl acetate solution.

2. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 1, characterized in that: The filter component includes mounting cylinder (203), connecting pipe (204), first filter assembly, second filter assembly and drive assembly, the mounting cylinder (203) is rotatably embedded in the inner wall of the filter box (201), the connecting pipe (204) is fixedly embedded on one side of the inner wall of the filter box (201), the first filter assembly is arranged on the mounting cylinder (203), the second filter assembly is arranged in the mounting cylinder (203), the drive assembly is arranged on the filter box (201), one end of the connecting pipe (204) is mounted on one side of the outer wall of the adjusting box (301).

3. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 2, characterized in that: The first filter assembly includes a plurality of partitions (205), a plurality of filter plates (206) and a plurality of feed holes (207), each of the partitions (205) is fixedly arranged on the outer wall of the mounting cylinder (203) at equal intervals in the circumferential direction, each of the filter plates (206) is fixedly arranged between every two partitions (205), and each of the feed holes (207) is formed on the outer wall of the mounting cylinder (203) at equal intervals in the circumferential direction.

4. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 3, characterized in that: The second filter assembly includes a placing cylinder (208), a plurality of filter screens (209) and a plurality of filter cloths (210), the placing cylinder (208) is threadedly connected to the inner wall of the mounting cylinder (203), each of the filter screens (209) is fixedly embedded on the outer wall of the placing cylinder (208) at equal intervals in the circumferential direction, and each of the filter cloths (210) is fixedly arranged on the top of the outer wall of the filter screen (209).

5. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 4, characterized in that: The driving assembly comprises a servo motor (211), a grooved wheel (212), a driving disc (213) and a cylindrical pin (214), the servo motor (211) is bolted to one side of the outer wall of the filter box (201), the driving disc (213) is fixedly sleeved on the outer wall of the servo motor (211), the grooved wheel (212) is fixedly sleeved on the outer wall of the mounting cylinder (203), the cylindrical pin (214) is fixedly arranged on one side of the outer wall of the driving disc (213) near the edge, the cylindrical pin (214) is slidingly embedded in the inner wall of the grooved wheel (212), the inner wall of the filter box (201) is fixedly provided with an inclined mesh plate (5), one side of the inner wall of the filter box (201) near the bottom edge is fixedly provided with a circulating pipe (6), the outer wall of the base (1) is provided with a liquid pump (7) at the top, the input end of the liquid pump (7) is connected with the circulating pipe (6), and the output end of the liquid pump (7) is connected with the liquid inlet pipe (202) through a pipeline.

6. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 5, characterized in that: The adjusting component comprises an acid liquid storage tank (302), an alkali liquid storage tank (303), two adjusting pipes (304) and two metering pumps (305), the acid liquid storage tank (302) is installed on the top of the outer wall of the adjusting tank (301), the alkali liquid storage tank (303) is installed on the top of the outer wall of the adjusting tank (301), one of the metering pumps (305) is installed on the output end of the acid liquid storage tank (302), the other metering pump (305) is installed on the output end of the alkali liquid storage tank (303), and one end of each adjusting pipe (304) is fixedly embedded in one side of the outer wall of the adjusting tank (301), and each adjusting pipe (304) is connected with the metering pump (305).

7. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 6, characterized in that: Said stirring component comprises a reversible motor (306), a rotating shaft (307), a mounting plate (308), a first gear (309), a plurality of connecting shafts (310), a plurality of second gears (311), a plurality of movable racks (312), a plurality of stirring rods (313), a plurality of third gears (314) and a plurality of internal gears (315), the reversible motor (306) is bolted to the top of the outer wall of the adjusting box (301), the rotating shaft (307) is fixedly arranged at the output end of the reversible motor (306), the mounting plate (308) is fixedly arranged at the bottom of the outer wall of the rotating shaft (307), the first gear (309) is fixedly arranged at the top of the outer wall of the adjusting box (301), each connecting shaft (310) is rotatably embedded at the top of the outer wall of the mounting plate (308), each second gear (311) is fixedly sleeved at the outer wall of the connecting shaft (310), each movable rack (312) is rotatably embedded at the top of the outer wall of the mounting plate (308), each stirring rod (313) is rotatably embedded at the top of the outer wall of the movable rack (312) near one side edge, each third gear (314) is fixedly sleeved at the outer wall of the stirring rod (313), each internal gear (315) is fixedly arranged at the bottom of the outer wall of the mounting plate (308), and each internal gear (315) is engaged with the third gear (314), each second gear (311) is engaged with the first gear (309), and each third gear (314) is engaged with the second gear (311).

8. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 7, characterized in that: Said detection component comprises a mounting frame (316), a lead screw (317), a moving frame (318), an external gear (319) and a pH sensor (320), the mounting frame (316) is fixedly arranged at the bottom of the outer wall of one movable rack (312), the lead screw (317) is rotatably embedded in the inner wall of the mounting frame (316), and the lead screw (317) movably penetrates the top of the outer wall of the movable rack (312), the external gear (319) is fixedly sleeved at the outer wall of the lead screw (317), and the external gear (319) is engaged with the internal gear (315), the moving frame (318) is slidably embedded in the inner wall of the mounting frame (316), each moving frame (318) is threadedly connected to the outer wall of the lead screw (317), and the pH sensor (320) is mounted on the inner wall of the moving frame (318).

9. The apparatus for purifying and recovering waste isopropyl acetate solution according to claim 8, characterized in that: The purification and recovery mechanism (4) comprises a rectifying tower (401), an extraction tank (402), a permeation evaporation device (403) and an esterification tower (404), all of which are installed on the top of the outer wall of the base (1), the input end of the rectifying tower (401) is connected with the output end of the adjusting box (301) through a pipeline, the input end of the extraction tank (402) is connected with the output end of the rectifying tower (401) through a pipeline, the input end of the permeation evaporation device (403) is connected with the output end of the extraction tank (402) through a pipeline, and the input end of the esterification tower (404) is connected with the output end of the permeation evaporation device (403) through a pipeline.

10. The operating method of the waste isopropyl acetate solution purification and recovery equipment, which is applied to the waste isopropyl acetate solution purification and recovery equipment in any one of claims 9, characterized in that, The method comprises the following steps: S1: filtering waste liquid: the waste isopropyl acetate solution is introduced into the filter box (201) through the liquid inlet pipe (202), the waste liquid enters between the two partitions (205), the larger particle impurities are filtered out through the filter plate (206), then enter the inside of the installation cylinder (203) through the feed hole (207), the waste liquid is further filtered through the filter cloth (210) and the filter screen (209) to remove small particles, so that the filtered solution is more pure, the filtered solution is transported into the adjusting box (301) through the connecting pipe (204), a servo motor (211) is started every certain period of time, the servo motor (211) drives the driving dial (213) to rotate, the cylindrical pin (214) on the driving dial (213) drives the grooved wheel (212), so that the intermittent rotation of the installation cylinder (203) is realized, the multiple filter plates (206), multiple filter screens (209) and multiple filter cloths (210) are sequentially replaced, the filter plate (206) at the bottom of the installation cylinder (203) will dump the large particle impurities filtered out on the inclined mesh plate (5), so that the particles and the waste liquid are separated, the waste liquid at the bottom of the filter box (201) is transported into the liquid inlet pipe (202) through the circulating pipe (6) and the pipeline under the action of the liquid pump (7), the filter box (201) is filtered again, and the circulating filtration is realized; S2: Adjusting the pH value of waste liquid: according to the initial pH value of waste liquid, the amount of acid or alkali added in the acid storage tank (302) or alkali storage tank (303) is accurately controlled by the metering pump (305), the acid or alkali is transported into the adjusting tank (301) through the adjusting pipe (304), the forward-reverse motor (306) is started, the rotating shaft (307) is rotated by the forward-reverse motor (306), and then the mounting plate (308), the connecting shaft (310), the movable frame (312) and the stirring rod (313) are rotated, at the same time, the connecting shaft (310) drives the movable frame (312) to rotate due to the meshing relationship between the first gear (309) and the second gear (311), the position of the stirring rod (313) and the pH sensor (320) is switched, and then the stirring rod (313) rotates around the sun while rotating around itself due to the meshing relationship between the third gear (314) and the internal gear (315), so that the solution in the adjusting tank (301) is fully stirred, in the stirring process, the internal gear (315) meshes with the external gear (319), so that the external gear (319) drives the lead screw (317) to rotate in the mounting frame (316), and then drives the moving frame (318) and the pH sensor (320) to move up and down, the pH value of the solution in the adjusting tank (301) at different depths and different directions is monitored in real time, the one-sidedness of single fixed position detection is avoided, and the accuracy and comprehensiveness of pH value adjustment are improved; S3: Waste liquid purification and recovery: the solution with adjusted pH value is transported into the rectifying column (401) through the pipeline, and is preliminarily purified to remove part of impurities and water, the solution after rectification is transported into the extraction tank (402) through the pipeline, and the useful components in the solution are further purified by using the extractant, the solution after extraction is transported into the osmotic evaporation device (403) through the pipeline, and the trace impurities and water in the solution are removed by the principle of osmotic evaporation to improve the purity of the solution, finally, the purified solution is transported into the esterification column (404) through the pipeline, and the esterification reaction is carried out to generate high-purity isopropyl acetate product, realizing the purification and recovery of waste isopropyl acetate solution.

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