An MVR continuous circulation evaporation device for extracting single-component polyamide

Abstract

The present invention relates to the technical field of evaporation equipment, and particularly relates to an MVR continuous circulation evaporation equipment for extracting single-component polyamide. Aiming at the problem that in the existing MVR continuous circulation evaporation equipment, the steam output of the previous-stage device is unstable and affects the subsequent processes. It includes a fixed tank with a uniform distribution, an evaporation element is fixedly connected inside the fixed tank, a gas storage tank is fixedly connected and communicated with the outside of the fixed tank, a first electric push rod is fixedly connected to the gas storage tank, a first sliding plate is fixedly connected to the telescopic end of the first electric push rod, and first pressure sensors are symmetrically distributed and fixedly connected to the first sliding plate. The present invention temporarily stores and collects the steam produced by adjacent fixed tanks through the gas storage tank, and then pushes the collected steam to the compressor at a uniform speed, reducing the amplitude of the steam volume fluctuation. At the same time, the generation situation of the steam in the adjacent fixed tank can be known in advance through the first pressure sensor, which is convenient for the staff to make adjustments according to the actual situation.

Description

Technical Field

[0001] The present invention relates to the technical field of evaporation equipment, and particularly relates to an MVR continuous circulation evaporation equipment for extracting nylon monomers. Background Art

[0002] During the recovery process of nylon monomers, a process of extracting nylon monomers with an organic solution is usually used. During the extraction process, to increase the extraction efficiency, the extraction process is usually repeated many times. Therefore, a large amount of extraction water with a low concentration of nylon monomers is generated at the end. This part of the extraction water usually needs to be recovered using an MVR continuous circulation evaporation equipment to separate the organic solvent and nylon monomers. The MVR continuous circulation evaporation equipment is an energy-saving and environmentally friendly multi-stage evaporation equipment. The MVR continuous circulation evaporation equipment usually passes the low-temperature and low-pressure steam generated by the first-stage evaporation into a compressor, and then converts it into high-quality steam with high temperature and high pressure through the work of the compressor. Finally, the high-quality steam is passed into the subsequent circulation evaporation equipment, thereby saving the energy consumed when heating steam in the traditional way during the evaporation process and achieving the purpose of energy conservation and emission reduction. When the existing MVR continuous circulation evaporation equipment is working, the steam required by the subsequent stage seriously depends on the steam produced by the previous-stage device. However, the speed and quantity of steam that can be produced during the evaporation process of the previous-stage device are not stable, which will undoubtedly have an adverse impact on the evaporation efficiency of the subsequent-stage device. Moreover, under the multi-stage chain reaction, this impact will be further amplified, ultimately affecting the overall evaporation efficiency of the device. Therefore, the existing MVR continuous circulation evaporation equipment needs to be improved to a certain extent. Summary of the Invention

[0003] In order to overcome the drawback that the unstable steam output of the previous-stage device in the existing MVR continuous circulation evaporation equipment affects the subsequent processes, the technical problem of the present invention is to provide an MVR continuous circulation evaporation equipment for extracting nylon monomers.

[0004] The technical implementation solution of the present invention is: an MVR continuous circulation evaporation device for extracting single-component polyamide fiber, including evenly distributed fixed tanks. An evaporation member is fixedly connected inside the fixed tank. The outside of the fixed tank is fixedly connected and communicated with an air storage tank, and a one-way valve is installed at the connection between the two. The air storage tank is communicated with the inlet of a compressor through a pipeline, and a one-way valve is installed at the connection between the two. Inside the fixed tank, near the adjacent air storage tank, it is communicated with the outlet of the compressor through a pipeline. The air storage tank is fixedly connected with a first electric push rod. The telescopic end of the first electric push rod is fixedly connected with a first sliding plate. The telescopic end of the first electric push rod is slidably connected with the adjacent air storage tank. The first sliding plate is slidably located inside the adjacent air storage tank. The first sliding plate is fixedly connected with symmetrically distributed fixed shells and symmetrically distributed first pressure sensors. A sliding member is slidably connected to the fixed shell. On the side of the sliding member away from the adjacent fixed shell, a second sliding plate is fixedly connected. The telescopic end of the first electric push rod is slidably connected with the adjacent second sliding plate. The second sliding plate is slidably and sealingly connected with the adjacent air storage tank. An elastic member is fixedly connected between the second sliding plate and the adjacent first pressure sensor. A locking mechanism for prohibiting the movement of the adjacent and symmetrically distributed sliding members is arranged on the first sliding plate. A liquid pressing mechanism for actively pushing the polyamide fiber solution to flow is arranged inside the fixed tank.

[0005] Furthermore, the locking mechanism includes an electric rotating shaft installed on the first sliding plate. The electric rotating shaft is fixedly connected with symmetrically distributed multi-stage telescopic rods. The telescopic ends of the multi-stage telescopic rods are fixedly connected with a rotating plate. The rotating plate is rotatably connected with the adjacent sliding member. The sliding member and the adjacent rotating plate are both provided with evenly distributed through holes with the same diameter, and the through holes of the two are in communication and cooperation.

[0006] Furthermore, the through holes evenly distributed in the circumferential direction on the adjacent two sliding members correspond one by one, and the through holes evenly distributed on the adjacent two rotating plates are staggered.

[0007] Furthermore, a fixed column is fixedly connected to the second sliding plate on the side of the first sliding plate away from the adjacent first electric push rod. The fixed column is located on the side of the second sliding plate away from the adjacent first electric push rod. Electromagnetic three-way valves are fixedly connected to the pipelines connecting the two air storage tanks that are farthest apart among the evenly distributed air storage tanks and the compressor. The adjacent electromagnetic three-way valves are interconnected.

[0008] Furthermore, the liquid pressing mechanism includes a second electric push rod, which is fixedly connected to the upper side of the adjacent fixed tank. The evaporation member includes an upper circular plate, a lower circular plate, and evenly distributed evaporation tubes. The upper circular plate and the lower circular plate together divide the inner cavity of the adjacent fixed tank into a liquid inlet cavity, a steam cavity, and a liquid outlet cavity in sequence from top to bottom. The liquid inlet cavity and the adjacent liquid outlet cavity are connected through the adjacent and evenly distributed evaporation tubes. The telescopic end of the second electric push rod is fixedly connected with a pressing plate, which is slidably connected to the adjacent fixed tank in the adjacent liquid inlet cavity. The pressing plate is provided with evenly distributed through holes, and the evenly distributed through holes on the pressing plate correspond to the adjacent evaporation tubes one by one. A liquid holding cylinder is fixedly connected in the through hole of the pressing plate. The liquid holding cylinder and the adjacent evaporation tube are set as a group. A top plate is fixedly connected to the upper side of the fixed tank, and the telescopic end of the second electric push rod passes through the adjacent top plate. The upper circular plate and the adjacent pressing plate are jointly provided with evenly distributed blocking components and liquid guiding components corresponding to the evaporation tubes one by one. The blocking component is used to block the flow path of the nylon solution entering the adjacent evaporation tube, and the liquid guiding component is used to promote the adjacent liquid holding cylinder to introduce the nylon solution into the adjacent evaporation tube.

[0009] Furthermore, the blocking component includes a fixing frame distributed up and down, and the fixing frames distributed up and down are respectively fixedly connected to the side of the evaporation member close to the adjacent evaporation tube and the adjacent through hole on the pressing plate. A liquid guiding member is rotatably connected to the lower side of the fixing frame. An electromagnetic blocking member is installed on the upper side of the liquid holding cylinder and the upper side of the adjacent evaporation tube. The electromagnetic blocking member is located below the adjacent liquid guiding member and the two are in sealing cooperation.

[0010] Furthermore, the liquid guiding component includes an upper liquid guiding ring, which is fixedly connected and communicated with the lower side of the adjacent liquid holding cylinder. The lower adjacent fixing frame of the liquid holding cylinder is fixedly connected with a lower liquid guiding ring. The upper liquid guiding ring and the lower liquid guiding ring are connected and communicated through a flexible hose. A liquid guiding pipe group is rotatably connected and communicated with the lower side of the lower liquid guiding ring. The liquid guiding pipe group is communicated with the adjacent evaporation tube. The upper circular plate is provided with a power component for driving all the liquid guiding members to rotate.

[0011] Furthermore, the power assembly includes evenly distributed rotating columns, which correspond one to one with the evaporation tubes evenly distributed in adjacent fixed tanks, and the rotating columns are rotatably connected to the top plate, and the evenly distributed rotating columns are all driven by pulley belts, an electric motor is fixedly connected to the upper part of the fixed tank, and the output shaft of the motor is driven by the adjacent rotating columns through gear racks, the liquid guiding parts on the extrusion plate are fixedly connected with symmetrically distributed magnets, and the rotating columns are fixedly connected with symmetrically distributed magnets, and the magnets in the liquid guiding parts on the extrusion plate and the magnets in the adjacent rotating columns are magnetically attracted to each other, the rotating column is rotatably connected to the adjacent upper liquid guiding ring and the adjacent lower liquid guiding ring, the rotating column is fixedly connected to the adjacent liquid guiding tube group, and the rotating column is fixedly connected to the adjacent liquid guiding parts on the upper circular plate.

[0012] Furthermore, a liquid blocking ring is fixedly connected to the lower side of the liquid guiding member on the upper circular plate.

[0013] Furthermore, it also includes detection mechanisms that are evenly distributed and are used to detect whether the nylon solution is evenly distributed in adjacent evaporation tubes. The detection mechanisms are arranged in adjacent evaporation tubes. The detection mechanisms include a fixed plate, which is fixedly connected to the lower side of the adjacent rotating column. The fixed plate is slidably connected to a scraper, and the scraper is fixedly connected to a second pressure sensor. The second pressure sensor and the scraper are both fixedly connected to the adjacent fixed plate with a spring, and there is a gap between the scraper and the adjacent evaporation tube.

[0014] The present invention has the following advantages: the present invention temporarily stores and collects the steam produced by the adjacent fixed tank through the gas storage tank, and then pushes the collected steam to the compressor at a uniform speed, thereby reducing the amplitude of the fluctuation of the steam volume. At the same time, the first pressure sensor is used to know in advance the generation of steam in the adjacent fixed tank, so that the staff can make adjustments according to the actual situation.

[0015] The present invention actively pushes the nylon solution in the adjacent liquid inlet cavity to flow into the adjacent evaporation tube through the liquid pressure mechanism, thereby controlling the flow rate of the nylon solution in the adjacent evaporation tube, facilitating the uniform distribution of the nylon solution on the inner wall of the adjacent evaporation tube, and increasing the evaporation efficiency of the adjacent evaporation tube for the nylon solution therein.

[0016] The present invention detects whether the nylon solution is evenly distributed in adjacent evaporation tubes through a detection mechanism, thereby assisting staff to predict the evaporation efficiency of the nylon solution in advance, making it convenient for the staff to make adjustments according to actual conditions, and further reducing the fluctuation amount of the steam output from the fixed tank at that location. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 Cross-sectional view of the fixed tank and the gas storage tank of the present invention;

[0019] Figure 3 Cross-sectional view of the gas storage tank, the first sliding plate and the second sliding plate of the present invention;

[0020] Figure 4 Schematic perspective view of the first sliding plate, the fixed shell and the second sliding plate of the present invention;

[0021] Figure 5 Exploded view of the sliding member, the electric rotating shaft and the rotating plate of the present invention;

[0022] Figure 6 Schematic perspective view of the fixed tank, the extrusion plate and the top plate of the present invention;

[0023] Figure 7 Schematic perspective view of the fixed tank, the second electric push rod and the rotating column of the present invention;

[0024] Figure 8 Cross-sectional view of the evaporation tube, the fixed bracket and the liquid guiding member of the present invention;

[0025] Figure 9 Exploded view of the fixed bracket, the liquid guiding member and the electromagnetic sealing member of the present invention;

[0026] Figure 10 Schematic perspective view of the evaporation tube, the fixing plate and the liquid scraping member of the present invention.

[0027] Meanings of the reference numerals in the figures: 1: fixed tank, 2: evaporation member, 3: gas storage tank, 4: first electric push rod, 5: first sliding plate, 6: fixed shell, 7: first pressure sensor, 8: sliding member, 9: second sliding plate, 10: elastic member, 11: electric rotating shaft, 12: multi-stage telescopic rod, 13: rotating plate, 14: fixed column, 15: electromagnetic three-way valve, 21: evaporation tube, 22: second electric push rod, 23: extrusion plate, 24: liquid storage cylinder, 25: top plate, 26: fixed bracket, 27: liquid guiding member, 28: electromagnetic sealing member, 29: upper liquid guiding ring, 30: lower liquid guiding ring, 31: liquid guiding pipe group, 32: rotating column, 33: motor, 34: liquid blocking ring, 35: fixing plate, 36: liquid scraping member, 37: second pressure sensor. Detailed implementation manners

[0028] References to embodiments in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] Embodiment 1: When the existing MVR continuous circulation evaporation equipment operates, it is necessary to introduce the steam generated by the evaporation in the previous stage into the compressor, and then pass the compressed steam through the compressor into the next-stage equipment to enable the next-stage equipment to continue distilling the nylon solution. However, both the efficiency of the steam generated by the evaporation in the previous stage and the quantity of the generated steam are unstable. If the steam generated by this equipment is directly introduced into the compressor for compression, it will cause the quality of the steam output by the compressor to the next-stage equipment to be unstable, affecting the evaporation efficiency of the next-stage equipment for the nylon solution.

[0030] In view of the above problems, the present invention provides an MVR continuous circulation evaporation equipment for extracting nylon monomers, which is compared with Figures 1-4 , and includes three fixed tanks 1 evenly distributed, an external compressor, and a control terminal. The three fixed tanks 1 are the first fixed tank 1, the second fixed tank 1, and the third fixed tank 1 from left to right. The three fixed tanks 1 continuously distill the nylon solution in sequence. An evaporation member 2 is fixedly connected inside the fixed tank 1. The evaporation member 2 includes an upper circular plate, a lower circular plate, and evenly distributed evaporation tubes 21. The evaporation member 2 enables the nylon liquid on the upper side of the upper circular plate to flow into the adjacent evaporation tubes 21, and evaporates the nylon solution by heating the evaporation tubes 21 with steam. The upper circular plate and the lower circular plate together divide the cavity inside the adjacent fixed tank 1 into a liquid inlet chamber, a steam chamber, and a liquid outlet chamber from top to bottom in sequence. The upper part on the left side of the liquid inlet chamber is connected to the existing liquid storage tank for storing the nylon solution through a pipeline (the connection position is as shown in Figure 2 ). The steam and concentrated liquid generated in the evaporation tubes 21 are discharged downward into the liquid outlet chamber. The concentrated nylon solution in the liquid outlet chamber is connected to the existing liquid pump through the pipeline below it. The liquid pump is used to pump the concentrated nylon solution into the existing liquid storage tank. The liquid inlet chamber and the adjacent liquid outlet chamber are connected through the adjacent and evenly distributed evaporation tubes 21. A gas storage tank 3 is fixedly connected to the outside of the fixed tank 1. The right side of the fixed tank 1 is connected to the adjacent gas storage tank 3 through a pipeline (the connection positions are as shown in Figure 2 and Figure 3As shown in the figure), and a one-way valve is installed at the connection between the two. This pipeline is connected to the steam chamber of the fixed tank 1. The lower part on the left side of the steam chamber is connected to the outside through a pipeline. The one-way valve between the fixed tank 1 and the adjacent gas storage tank 3 is used to ensure that the gas only flows from the fixed tank 1 into the adjacent gas storage tank 3. The gas storage tank 3 is used to temporarily store the steam produced in the adjacent fixed tank 1. The right side of the gas storage tank 3 is connected to the inlet of the compressor through a pipeline, and a one-way valve is installed at the connection between the two. The one-way valve between the gas storage tank 3 and the compressor is used to ensure that the gas only flows from the gas storage tank 3 into the adjacent compressor. The upper part on the right side of the fixed tank 1 is connected to the compressor outlet through a pipeline (the connection position is as shown in Figure 1 and Figure 2 As shown in the figure). A first electric push rod 4 electrically connected to the control terminal is fixedly connected to the bottom of the gas storage tank 3. The telescopic end of the first electric push rod 4 is fixedly connected to a first sliding plate 5. The telescopic end of the first electric push rod 4 is slidably connected to the adjacent gas storage tank 3. The first sliding plate 5 slides inside the adjacent gas storage tank 3. The first sliding plate 5 is fixedly connected with a fixed shell 6 symmetrically distributed up and down and first pressure sensors 7 symmetrically distributed and both electrically connected to the control terminal. A sliding member 8 is slidably connected to the fixed shell 6. The sliding member 8 is composed of a support rod and a sliding plate. The side of the sliding member 8 away from the adjacent fixed shell 6 is fixedly connected to a second sliding plate 9. The inner cavity of the gas storage tank 3 is divided into two gas storage chambers by two second sliding plates 9. The two gas storage chambers are respectively located on the back sides of the two second sliding plates 9 symmetrically distributed. The second sliding plate 9 is used to detect the generation amount of the vapor. And when the second sliding plate 9 and the adjacent sliding member 8 are in a relatively fixed state with the adjacent fixed shell 6, the second sliding plate 9 squeezes the adjacent gas out towards the compressor. The telescopic end of the first electric push rod 4 is slidably connected to the adjacent second sliding plate 9. The second sliding plate 9 is slidably and sealingly connected to the adjacent gas storage tank 3. An elastic member 10 is fixedly connected between the second sliding plate 9 and the adjacent first pressure sensor 7. The elastic member 10 is a tension spring. A locking mechanism for prohibiting the movement of the adjacent and symmetrically distributed sliding members 8 is arranged on the first sliding plate 5. A liquid pressing mechanism for actively pushing the nylon solution to flow is arranged in the fixed tank 1. The locking mechanism and the liquid pressing mechanism are both electrically connected to the control terminal.

[0031] Contrast Figure 4 and Figure 5 , the locking mechanism includes an electric rotating shaft 11 installed in the middle of the first sliding plate 5. The electric rotating shaft 11 is electrically connected to the control terminal. The electric rotating shaft 11 is fixedly connected with two multi-stage telescopic rods 12 symmetrically distributed up and down. The telescopic ends of the multi-stage telescopic rods 12 are fixedly connected to a rotating plate 13. The rotating plate 13 is rotatably connected to the adjacent sliding member 8. The sliding member 8 and the adjacent rotating plate 13 are both provided with through holes evenly distributed and having the same diameter. The through holes circumferentially and evenly distributed on the adjacent two sliding members 8 correspond one by one. The through holes evenly distributed on the adjacent two rotating plates 13 are staggered. That is, among the two symmetrically distributed sliding members 8 at the same time, only the through holes on one sliding member 8 are communicated with the through holes on the adjacent rotating plate 13.

[0032] Control Figures 1-3 , on the upper side of the second sliding plate 9 on the upper side of the first sliding plate 5, a fixing column 14 is fixedly connected. The diameter of the fixing column 14 is the same as the diameter of the telescopic end of the first electric push rod 4, thereby ensuring the same efficiency of discharging gas from the upper and lower air storage chambers, further ensuring the stability of supplying gas to the compressor. On both the first fixed tank 1 and the third fixed tank 1, electromagnetic three-way valves 15 electrically connected to the control terminal are fixedly connected to the pipelines where the gas storage tank 3 is connected to the compressor. The two electromagnetic three-way valves 15 are interconnected and are used to supplement the steam produced in the third fixed tank 1 into the compressor when the steam production in the first fixed tank 1 is severely insufficient.

[0033] Control Figures 6-8 , the liquid pressing mechanism includes a second electric push rod 22 electrically connected to the control terminal. The second electric push rod 22 is fixedly connected to the upper side of the adjacent fixed tank 1. The telescopic end of the second electric push rod 22 is fixedly connected with a pressing plate 23. The pressing plate 23 divides the liquid inlet cavity into an upper liquid inlet cavity and a lower liquid inlet cavity. The pressing plate 23 is located in the liquid inlet cavity and is slidably connected to the adjacent fixed tank 1. The pressing plate 23 is provided with uniformly distributed through holes. The uniformly distributed through holes on the pressing plate 23 respectively correspond to the adjacent evaporation tubes 21 one by one. A liquid holding cylinder 24 is fixedly connected in the through hole of the pressing plate 23. The liquid holding cylinder 24 is used to collect the nylon solution adjacent to the upper side of the pressing plate 23, facilitating the subsequent device to discharge the nylon solution into the adjacent evaporation tube 21 below. The liquid holding cylinder 24 and the adjacent evaporation tube 21 are set as a group. A top plate 25 is fixedly connected to the upper side of the fixed tank 1. The top plate 25 is located above the upper liquid inlet cavity. The telescopic end of the second electric push rod 22 passes through the adjacent top plate 25. The upper circular plate and the adjacent pressing plate 23 are jointly provided with uniformly distributed plugging components and liquid guiding components that correspond to the evaporation tubes 21 one by one. Both the plugging components and the liquid guiding components are electrically connected to the control terminal. The plugging components are used to block the flow path of the nylon solution entering the adjacent evaporation tube 21, and the liquid guiding components are used to promote the adjacent liquid holding cylinder 24 to introduce the nylon solution into the adjacent evaporation tube 21.

[0034] Control Figures 6-8 , the plugging component includes fixing frames 26 that are distributed up and down and are respectively fixedly connected to one side of the evaporation part 2 close to the adjacent evaporation tube 21 and at the adjacent through holes on the pressing plate 23. A liquid guiding part 27 is rotatably connected to the lower side of the fixing frame 26. The liquid guiding part 27 is composed of a circular ring and three liquid guiding plates evenly distributed in the circumferential direction. Electromagnetic plugging parts 28 electrically connected to the control terminal are installed on the upper side of the liquid holding cylinder 24 and the upper side of the adjacent evaporation tube 21. The electromagnetic plugging part 28 is composed of a push rod and a plugging ring. The electromagnetic plugging part 28 is in sealing cooperation with the lower side surface of the adjacent liquid guiding part 27, thereby controlling the flow state of the adjacent nylon solution.

[0035] Control Figures 8-10, the liquid guiding component includes an upper liquid guiding ring 29 fixedly connected and communicated with the lower side of the adjacent liquid storage cylinder 24. A lower liquid guiding ring 30 is fixedly connected to the adjacent fixing frame 26 on the lower side of the liquid storage cylinder 24. The upper liquid guiding ring 29 and the lower liquid guiding ring 30 are communicated through a flexible hose. The upper liquid guiding ring 29 guides the nylon solution on the upper side of the extrusion plate 23 into the adjacent lower liquid guiding ring 30, and then smoothly injects the nylon solution into the adjacent evaporation tube 21. The lower side of the lower liquid guiding ring 30 is rotatably connected and communicated with a liquid guiding pipe group 31. The liquid guiding pipe group 31 is communicated with the adjacent evaporation tube 21. The upper circular plate is provided with a power component for driving all the liquid guiding members 27 to rotate. The power component is electrically connected to the control terminal.

[0036] Control Figures 7-9 , the power component includes rotating columns 32 that are evenly distributed and correspond one by one to all the evaporation tubes 21 in the adjacent fixed tank 1. The rotating columns 32 are rotatably connected to the top plate 25. The evenly distributed rotating columns 32 are all driven by belt and pulley (the transmission method is as Figure 7 shown). A motor 33 electrically connected to the control terminal is fixedly connected to the upper part of the fixed tank 1. The output shaft of the motor 33 and the adjacent rotating column 32 are driven by gear and rack to drive all the rotating columns 32 to rotate together. Magnets symmetrically distributed left and right are fixedly connected inside the liquid guiding members 27 on the extrusion plate 23 (as Figure 9 shown). Long strip magnets symmetrically distributed left and right are fixedly connected inside the rotating columns 32. The magnets inside the liquid guiding members 27 on the extrusion plate 23 and the magnets inside the adjacent rotating columns 32 are magnetically attracted to each other, which is convenient for the rotating columns 32 to drive the adjacent liquid guiding members 27 to rotate through their own magnets, and does not affect the relative sliding state of the rotating columns 32 and the liquid guiding members 27. The rotating columns 32 are rotatably connected to the adjacent upper liquid guiding ring 29 and the adjacent lower liquid guiding ring 30. The rotating columns 32 are fixedly connected to the adjacent liquid guiding pipe group 31. The rotating columns 32 are fixedly connected to the adjacent liquid guiding members 27 on the upper circular plate. A liquid blocking ring 34 is fixedly connected to the lower side of the liquid guiding member 27 on the upper circular plate. The liquid blocking ring 34 is used to guide the adjacent nylon solution to prevent the nylon solution between the adjacent liquid guiding members 27 and the adjacent electromagnetic blocking members 28 from being unevenly sprayed into the adjacent evaporation tube 21.

[0037] When the staff evaporates and concentrates the extraction liquid (hereinafter referred to as the nylon solution), the staff first passes the pre-prepared preliminary steam into the steam chamber of the first fixed tank 1 through a pipeline. After the steam enters the steam chamber of the first fixed tank 1, it heats the evaporation tubes 21 on the adjacent evaporation parts 2. The steam flows from the upper side to the lower side of the steam chamber of the first fixed tank 1, and then the steam is discharged to the outside through the pipeline on the lower side of the steam chamber in the first fixed tank 1. Subsequently, the staff starts the second electric push rod 22 and the motor 33 on the first fixed tank 1. The telescopic end of the second electric push rod 22 drives the extrusion plate 23 and the adjacent parts to move up and down reciprocally. The extrusion plate 23 sucks the nylon solution into the liquid inlet chamber of the left first fixed tank 1 through the pipeline adjacent to the left side. The motor 33 drives the adjacent rotating column 32 to rotate through transmission. The rotating rotating column 32 drives all the rotating columns 32 in the first fixed tank 1 to rotate through a belt. The rotating column 32 drives the adjacent liquid guiding parts 27 and the liquid guiding pipe group 31 to rotate. The liquid guiding part 27 is used to promote the surrounding nylon solution to move towards the adjacent rotating column 32, facilitating the nylon solution to enter the adjacent evaporation tubes 21 and the adjacent liquid holding cylinders 24. The rotation of the liquid guiding pipe group 31 is used to rotate and spray the nylon solution in the adjacent lower liquid guiding ring 30 into the adjacent evaporation tubes 21, facilitating the uniform distribution of the nylon solution in the adjacent evaporation tubes 21. Taking the extrusion plate 23 moving from bottom to top as an example:

[0038] The remote control terminal controls the electromagnetic plugging member 28 on the pressing plate 23 to open, and the electromagnetic plugging member 28 releases the seal between it and the adjacent liquid guiding member 27 (at this time, the electromagnetic plugging member 28 on the upper circular plate still seals and cooperates with the adjacent liquid guiding member 27). When the pressing plate 23 moves upward, a negative pressure is generated in the adjacent lower liquid inlet chamber. The nylon solution is sucked into the lower liquid inlet chamber of the first fixed tank 1 from the existing liquid storage tank by the negative pressure. The gas in the upper liquid inlet chamber of the first fixed tank 1 is discharged downward through components such as the upper liquid guiding ring 29, the lower liquid guiding ring 30, and the evaporation member 2. When the pressing plate 23 moves to the uppermost end of the stroke, the pressing plate 23 starts to move downward. At this time, the remote control terminal controls the electromagnetic plugging member 28 on the upper circular plate to open, and at the same time closes the electromagnetic plugging member 28 on the pressing plate 23. During the downward movement of the pressing plate 23, the nylon solution is sucked into the upper liquid inlet chamber according to the same principle. The pressing plate 23 simultaneously squeezes the nylon solution in the lower liquid inlet chamber into the adjacent evaporation tube 21. The nylon solution gathers towards the adjacent evaporation tube 21 under the guiding action of the adjacent liquid guiding member 27 and enters the adjacent evaporation tube 21 through the gap between the adjacent electromagnetic plugging member 28 and the adjacent liquid guiding member 27. After the nylon solution enters the evaporation tube 21, it first contacts the liquid blocking ring 34. The liquid blocking ring 34 guides the nylon solution to a position close to the inner wall of the evaporation tube 21, promoting the nylon solution to flow downward closely along the inner wall of the evaporation tube 21, increasing the evaporation efficiency of the evaporation tube 21 for the nylon solution. The nylon solution evaporates to generate secondary steam. The secondary steam and the concentrated nylon solution flow downward together and finally enter the adjacent liquid outlet chamber. When the pressing plate 23 moves to the lowermost end of the stroke, the above steps are repeated cyclically. When the pressing plate 23 moves upward again, the nylon solution in the upper liquid inlet chamber is guided by the adjacent liquid guiding member 27 into the adjacent liquid holding cylinder 24. The nylon solution enters the adjacent liquid guiding tube group 31 through the adjacent upper liquid guiding ring 29 and the adjacent lower liquid guiding ring 30. The adjacent liquid guiding tube group 31 sprays the nylon solution towards the inner wall of the adjacent evaporation tube 21.

[0039] After the secondary steam enters the liquid outlet chamber in the first fixed tank 1, it is discharged into the gas storage tank 3 through a pipeline. The concentrated nylon solution is pumped into the existing liquid storage tank by a liquid pump to prepare for the subsequent evaporation process. When the staff starts the second electric push rod 22, the adjacent first electric push rod 4 is started synchronously. The telescopic end of the first electric push rod 4 drives the adjacent first sliding plate 5 and the adjacent components to move slowly up and down reciprocally. The following takes the downward movement of the leftmost first sliding plate 5 as an example:

[0040] When the first sliding plate 5 moves downward, the control terminal controls the electric rotating shaft 11 to rotate a certain angle. The electric rotating shaft 11 drives the adjacent rotating plate 13 to rotate a certain angle through two multi-stage telescopic rods 12. The upper rotating plate 13 rotates a certain angle so that the through hole on it communicates with the through hole on the adjacent sliding member 8. The lower rotating plate 13 rotates a certain angle so that the through hole on it is staggered from the through hole on the adjacent sliding member 8. At this time, the lower second sliding plate 9 and the adjacent sliding member 8 cannot slide relative to the adjacent fixed shell 6, and the upper second sliding plate 9 and the adjacent sliding member 8 can slide relative to the adjacent fixed shell 6 according to the force. The first sliding plate 5 drags the upper second sliding plate 9 to move downward together through the upper first pressure sensor 7 and the adjacent elastic member 10. The downward movement of the upper second sliding plate 9 causes a negative pressure in the upper air storage cavity. The secondary steam in the first fixed tank 1 is sucked into the upper air storage cavity of the air storage tank 3 by the negative pressure. The gas in the lower air storage cavity of the air storage tank 3 is squeezed by the lower second sliding plate 9 and discharged to the compressor through the pipeline.

[0041] When the secondary steam in the first fixed tank 1 enters the upper air storage cavity of the adjacent air storage tank 3, if the amount of secondary steam generated is large, the air pressure in the upper air storage cavity is sufficient, and the suction force of the upper second sliding plate 9 by the negative pressure is small. The upper second sliding plate 9 moves downward under the elastic force of the adjacent elastic member 10. If the amount of secondary steam generated in the first fixed tank 1 is small, it will cause a large negative pressure in the upper air storage cavity. At this time, the upper second sliding plate 9 is sucked by the negative pressure, and the second sliding plate 9 drives the adjacent sliding member 8 to slide upward relative to the adjacent fixed shell 6. The adjacent multi-stage telescopic rod 12 is stretched until the elastic force of the upper elastic member 10 is the same as the suction force of the negative pressure in the upper air storage cavity. Then the upper second sliding plate 9 moves downward together with the first sliding plate 5. The upper first pressure sensor 7 detects the change in the elastic force of the adjacent elastic member 10 and transmits the signal to the control terminal. The control terminal records the current evaporation efficiency in the fixed tank 1 in real time based on this.

[0042] When the first sliding plate 5 drives the two second sliding plates 9 to move downward, when the lower second sliding plate 9 moves to contact the adjacent gas storage tank 3 during the downward movement, the control terminal changes the moving direction of the telescopic end of the first electric push rod 4. The telescopic end of the first electric push rod 4 drives the first sliding plate 5 and the adjacent components to move upward. At this time, the control terminal controls the electric rotating shaft 11 to rotate and reset. The electric rotating shaft 11 drives the two rotating plates 13 to rotate and reset through the adjacent two multi-stage telescopic rods 12. At this time, the through holes of the upper rotating plate 13 are staggered from the through holes on the adjacent sliding member 8, and the through holes of the lower rotating plate 13 are communicated with the through holes on the adjacent sliding member 8. The lower sliding member 8 and the adjacent second sliding plate 9 can be in a free sliding state with the adjacent fixed shell 6. The lower second sliding plate 9 continues to collect the secondary steam in the first fixed tank 1 according to the above principle during the upward movement. The upper second sliding plate 9 and the sliding member 8 are in a relatively fixed state with the adjacent fixed shell 6. The second sliding plate 9 moves upward at a uniform speed. At this time, the lower elastic member 10 drives the lower second sliding plate 9 and the sliding member 8 to reset, and the multi-stage telescopic rod 12 follows the adjacent sliding member 8 to reset together, and uniformly extrudes the secondary steam in the upper gas storage cavity into the compressor.

[0043] When the gas storage tank 3 supplies the secondary steam to the compressor, the staff simultaneously starts the compressor through the control terminal. The compressor does work on the secondary steam, converts the secondary steam into high-quality steam with high temperature and high pressure, and supplies the high-quality steam into the steam cavities of the second fixed tank 1 and the third fixed tank 1 to heat the evaporation parts 2 in the second fixed tank 1 and the evaporation parts 2 in the third fixed tank 1. At this time, the staff starts the electrical control components in the second fixed tank 1 and the electrical control components in the third fixed tank 1 in the same way as above through the control terminal, pumps the concentrated nylon solution discharged from the first fixed tank 1 into the second fixed tank 1 for re-evaporation, discharges the concentrated nylon solution discharged from the second fixed tank 1 into the third fixed tank 1 for evaporation, and collects the concentrated nylon solution discharged from the third fixed tank 1. The steam generated after re-evaporation in the second fixed tank 1 is introduced into the adjacent gas storage tank 3, and the steam collected in this gas storage tank 3 is introduced into the first fixed tank 1 after doing work by the compressor to heat the evaporation part 2 in the first fixed tank 1 instead of the preparatory steam. A small amount of steam evaporated in the third fixed tank 1 is introduced into the adjacent gas storage tank 3 and discharged outward through the adjacent electromagnetic three-way valve 15. When the amount of steam produced in the first fixed tank 1 is insufficient, the control terminal simultaneously introduces the steam into the compressor through the adjacent electromagnetic three-way valve 15 to supplement the quantity of the steam filled into the compressor in the first fixed tank 1.

[0044] When the staff stops evaporating and concentrating the nylon solution, the staff first turns off the compressor and the three first electric push rods 4. Subsequently, the staff sequentially passes cleaning hot water into the first fixed tank 1, the second fixed tank 1, and the third fixed tank 1. After cleaning the three fixed tanks 1, the staff turns off the second electric push rods 22 and the motors 33 in the three fixed tanks 1.

[0045] Example 2: Control Figure 9 and Figure 10 It also includes a detection mechanism evenly distributed and respectively arranged in adjacent evaporation tubes 21. The detection mechanism is used to detect whether the nylon solution is evenly distributed in the adjacent evaporation tubes 21. The detection mechanism includes a fixing plate 35 fixedly connected to the lower side of the adjacent rotating column 32. A liquid scraping member 36 is slidably connected to the left side of the fixing plate 35. The liquid scraping member 36 is formed by fixedly connecting a sliding plate and an arc-shaped frame. The liquid scraping member 36 is fixedly connected with a second pressure sensor 37. Springs are fixedly connected between the second pressure sensor 37 and the liquid scraping member 36 and the adjacent fixing plate 35. There is a gap between the liquid scraping member 36 and the adjacent evaporation tube 21, which is used to scrape the nylon solution flat to the thickness of this gap, so as to ensure that the nylon solution evenly flows downward in the adjacent evaporation tubes 21.

[0046] When the rotating column 32 rotates, the rotating column 32 drives the adjacent liquid scraping member 36 to rotate together through the fixing plate 35 and the spring thereon. The liquid scraping member 36 scrapes the nylon solution on the inner wall of the adjacent evaporation tube 21, promoting the more uniform adhesion of the nylon solution sprayed by the adjacent liquid guiding pipe group 31 on the inner wall of the adjacent evaporation tube 21 and flowing downward. When the viscosity of the nylon solution in the second fixed tank 1 and the third fixed tank 1 gradually increases, at this time the nylon solution may not evenly cover the inner wall of the adjacent evaporation tube 21. At this time, the resistance of the liquid scraping member 36 scraping the nylon solution will gradually change during the movement. If there is less nylon solution attached to the inner wall of the adjacent evaporation tube 21, the resistance received by the liquid scraping member 36 during movement is smaller. The elastic force of the spring on the fixing plate 35 is proportional to the resistance received by the adjacent liquid scraping member 36. The second pressure sensor 37 detects the elastic force of the adjacent spring and transmits the signal to the control terminal. The control terminal receives the signals of all the second pressure sensors 37 in the fixed tank 1. If the nylon solution distribution on the inner walls of more than half of the evaporation tubes 21 is uneven, it may be that the viscosity of the nylon solution is too high, and the pressure exerted by the adjacent pressing plate 23 on the nylon solution is small, resulting in less nylon solution flowing into the adjacent evaporation tube 21. At this time, the control terminal appropriately increases the moving speed of the telescopic end of the second electric push rod 22 at this place, and then controls the pressing plate 23 at this place to extrude the adjacent nylon solution to flow into the adjacent evaporation tube 21 with a greater pressure, promoting the uniform distribution of the nylon solution in the evaporation tube 21.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An MVR continuous circulation evaporation device for nylon single substance extraction, comprising uniformly distributed fixed tanks (1), wherein an evaporation element (2) is fixedly connected to the fixed tank (1), and wherein: The invention also comprises uniformly distributed gas storage tanks (3), wherein the gas storage tanks (3) are fixedly connected to and communicated with the outer sides of the adjacent fixed tanks (1), and a one-way valve is installed at the connection point between the two, the gas storage tanks (3) are connected to the inlet of the compressor via a pipeline, and a one-way valve is installed at the connection point between the two, the inside of the fixed tank (1) near the adjacent gas storage tank (3) is connected to the outlet of the compressor via a pipeline, the gas storage tank (3) is fixedly connected to a first electric push rod (4), the telescopic end of the first electric push rod (4) is fixedly connected to a first sliding plate (5), the telescopic end of the first electric push rod (4) is slidably connected to the adjacent gas storage tank (3), the first sliding plate (5) is located in the adjacent gas storage tank (3) and slides, and the first sliding plate (5) is fixedly connected to symmetrically distributed The invention relates to a fixed shell (6) and a symmetrically distributed first pressure sensor (7), wherein the fixed shell (6) is slidably connected to a sliding member (8), and a second sliding plate (9) is fixedly connected to the side of the sliding member (8) away from the adjacent fixed shell (6), the telescopic end of the first electric push rod (4) is slidably connected to the adjacent second sliding plate (9), the second sliding plate (9) is sealingly slidably connected to the adjacent gas storage tank (3), an elastic member (10) is fixedly connected between the second sliding plate (9) and the adjacent first pressure sensor (7), the first sliding plate (5) is provided with a locking mechanism for prohibiting the adjacent and symmetrically distributed sliding members (8) from moving, and a liquid pressure mechanism for actively promoting the flow of nylon solution is provided in the fixed tank (1).

2. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 1 is characterized in that: The locking mechanism comprises an electric rotating shaft (11), the electric rotating shaft (11) being mounted on the first sliding plate (5), the electric rotating shaft (11) being fixedly connected to symmetrically distributed multi-stage telescopic rods (12), the telescopic ends of the multi-stage telescopic rods (12) being fixedly connected to a rotating plate (13), the rotating plate (13) being rotatably connected to the adjacent sliding member (8), the sliding member (8) and the adjacent rotating plate (13) both being provided with evenly distributed through holes of the same diameter, and the through holes of the two are in communication and matched.

3. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 2 is characterized in that: The through holes uniformly distributed circumferentially on two adjacent sliding members (8) correspond to each other one by one, and the through holes uniformly distributed on two adjacent rotating plates (13) are staggered.

4. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 1 is characterized in that: The second sliding plate (9) on the side of the first sliding plate (5) away from the adjacent first electric push rod (4) is fixedly connected with a fixing column (14), and the fixing column (14) is located on the side of the second sliding plate (9) away from the adjacent first electric push rod (4). The two gas storage tanks (3) farthest apart from each other among the evenly distributed gas storage tanks (3) are both fixedly connected with electromagnetic three-way valves (15) on the pipelines connecting the compressor, and the adjacent electromagnetic three-way valves (15) are connected with each other.

5. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 1 is characterized in that: The liquid pressing mechanism comprises a second electric push rod (22), the second electric push rod (22) being fixedly connected to the upper side of the adjacent fixed tank (1), the evaporation member (2) comprising an upper circular plate, a lower circular plate and uniformly distributed evaporation tubes (21), the upper circular plate and the lower circular plate jointly dividing the inner cavity of the adjacent fixed tank (1) into a liquid inlet cavity, a steam cavity and a liquid outlet cavity from top to bottom in sequence, the liquid inlet cavity and the adjacent liquid outlet cavity being connected via the adjacent and uniformly distributed evaporation tubes (21), the telescopic end of the second electric push rod (22) being fixedly connected to a squeezing plate (23), the squeezing plate (23) being slidably connected to the adjacent fixed tank (1) in the adjacent liquid inlet cavity, the squeezing plate (23) being provided with uniformly distributed through holes, and the squeezing plate (23) being uniformly distributed on the squeezing plate (23). The evenly distributed through holes correspond to the adjacent evaporation tubes (21) one by one, respectively; a liquid storage cylinder (24) is fixedly connected in the through hole of the extrusion plate (23); the liquid storage cylinder (24) and the adjacent evaporation tube (21) are set as a group; a top plate (25) is fixedly connected to the upper side of the fixed tank (1); the telescopic end of the second electric push rod (22) passes through the adjacent top plate (25); the upper circular plate and the adjacent extrusion plate (23) are jointly provided with evenly distributed blocking components and liquid guiding components corresponding to the evaporation tubes (21) one by one; the blocking components are used to block the flow path of the nylon solution entering the adjacent evaporation tube (21); and the liquid guiding components are used to promote the adjacent liquid storage cylinder (24) to introduce the nylon solution into the adjacent evaporation tube (21).

6. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 5 is characterized in that: The blocking component comprises a fixing frame (26) arranged up and down, the fixing frame (26) arranged up and down being fixedly connected to a side of the evaporating member (2) close to the adjacent evaporating tube (21) and to an adjacent through hole on the extrusion plate (23), respectively; a liquid guiding member (27) is rotatably connected to the lower side of the fixing frame (26); an electromagnetic blocking member (28) is installed on the upper side of the liquid storage cylinder (24) and the upper side of the adjacent evaporating tube (21); the electromagnetic blocking member (28) is located on the lower side of the adjacent liquid guiding member (27) and the two are sealed together.

7. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 6 is characterized in that: The liquid guiding component comprises an upper liquid guiding ring (29), the upper liquid guiding ring (29) being fixedly connected to and in communication with the lower side of the adjacent liquid storage cylinder (24), a lower liquid guiding ring (30) being fixedly connected to the fixing frame (26) adjacent to the lower side of the liquid storage cylinder (24), the upper liquid guiding ring (29) and the lower liquid guiding ring (30) being in communication with each other via a flexible hose, the lower side of the lower liquid guiding ring (30) being rotatably connected to and in communication with a liquid guiding tube group (31), the liquid guiding tube group (31) being in communication with the adjacent evaporating tube (21), and the upper circular plate being provided with a power assembly for driving all the liquid guiding components (27) to rotate.

8. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 7 is characterized in that: The power assembly comprises evenly distributed rotating columns (32), the rotating columns (32) corresponding one to one with the evenly distributed evaporating tubes (21) in the adjacent fixed tank (1), the rotating columns (32) being rotatably connected to the top plate (25), the evenly distributed rotating columns (32) being driven by pulleys and belts, an electric motor (33) being fixedly connected to the upper part of the fixed tank (1), the output shaft of the electric motor (33) being driven by the adjacent rotating columns (32) by gear racks, the liquid guide on the extrusion plate (23) The component (27) is fixedly connected with symmetrically distributed magnets, the rotating column (32) is fixedly connected with symmetrically distributed magnets, the magnet in the liquid guiding component (27) on the extrusion plate (23) and the magnet in the adjacent rotating column (32) are magnetically attracted to each other, the rotating column (32) is rotatably connected with the adjacent upper liquid guiding ring (29) and the adjacent lower liquid guiding ring (30), the rotating column (32) is fixedly connected with the adjacent liquid guiding tube group (31), and the rotating column (32) is fixedly connected with the adjacent liquid guiding component (27) on the upper circular plate.

9. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 8 is characterized in that: A liquid blocking ring (34) is fixedly connected to the lower side of the liquid guiding member (27) on the upper circular plate.

10. The MVR continuous circulation evaporation equipment for nylon single substance extraction according to claim 8 is characterized in that: The invention also comprises detection mechanisms which are evenly distributed and respectively used to detect whether the nylon solution is evenly distributed in adjacent evaporation tubes (21). The detection mechanisms are arranged in adjacent evaporation tubes (21). The detection mechanisms comprise a fixing plate (35). The fixing plate (35) is fixedly connected to the lower side of the adjacent rotating column (32). The fixing plate (35) is slidably connected to a scraping member (36). The scraping member (36) is fixedly connected to a second pressure sensor (37). A spring is fixedly connected between the second pressure sensor (37) and the scraping member (36) and the adjacent fixing plate (35). A gap exists between the scraping member (36) and the adjacent evaporation tube (21).

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