MVR (Mechanical Vapor Recompression) continuous circulating evaporation equipment for chinlon elementary substance extraction

Abstract

The invention relates to the technical field of evaporation equipment, in particular to MVR continuous circulation evaporation equipment for chinlon elementary substance extraction. The problem that in existing MVR continuous circulation evaporation equipment, the amount of steam generated by a previous-stage device is unstable, and the follow-up process is affected is solved. Comprising fixed tanks which are uniformly distributed, evaporation parts are fixedly connected in the fixed tanks, the outer sides of the fixed tanks are fixedly connected and communicated with a gas storage tank, the gas 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, and the first sliding plate is fixedly connected with first pressure sensors which are symmetrically distributed. Steam generated by the adjacent fixed tanks is temporarily stored and collected through the gas storage tank, then the collected steam is pushed out to the compressor at a uniform speed, the fluctuation amplitude of the steam amount is reduced, meanwhile, the generation situation of the steam in the adjacent fixed tanks is known in advance through the first pressure sensor, and a worker can make adjustment according to the actual situation conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of evaporation equipment, and in particular to an MVR continuous circulation evaporation equipment for nylon single substance extraction. Background Art

[0002] In the process of nylon element recovery, an organic solution is usually used to extract the nylon element. In the extraction process, in order to increase the extraction efficiency, the extraction process is usually repeated many times, so a large amount of extraction water with a low nylon element concentration will be produced in the end. This part of the extraction water usually needs to be recovered using MVR continuous cycle evaporation equipment to separate the organic solvent and nylon element. MVR continuous cycle evaporation equipment is an energy-saving and environmentally friendly multi-stage evaporation equipment. MVR continuous cycle evaporation equipment usually passes the low-temperature and low-pressure steam generated by the first-stage evaporation into the compressor, and then converts it into high-temperature and high-pressure high-quality steam through the work of the compressor. Finally, The high-quality steam is introduced into the subsequent circulating evaporation equipment, thereby saving the energy consumed by heating the steam in the traditional way during the evaporation process, and achieving the purpose of energy saving and emission reduction. When the existing MVR continuous circulating evaporation equipment is working, the steam required by the latter stage is heavily dependent on the steam produced by the previous stage device, but the speed and amount of steam that can be produced by the previous stage device during the evaporation process are not stable, which will undoubtedly have an adverse effect on the evaporation efficiency of the latter stage device, and this effect will be further amplified under the multi-stage chain reaction, and ultimately affect the overall evaporation efficiency of the device. Therefore, the existing MVR continuous circulating evaporation equipment needs to be improved to a certain extent. Summary of the invention

[0003] In order to overcome the disadvantage of the existing MVR continuous circulation evaporation equipment that the steam output of the previous stage device is unstable and affects the subsequent processes, the technical problem of the present invention is to provide an MVR continuous circulation evaporation equipment for nylon single substance extraction.

[0004] The technical implementation scheme of the present invention is: an MVR continuous circulation evaporation device for nylon single substance extraction, including uniformly distributed fixed tanks, an evaporating element is fixedly connected in the fixed tank, an air storage tank is fixedly connected and connected to the outside of the fixed tank, and a one-way valve is installed at the connection between the two, the air storage tank 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 fixed tank is connected to the compressor outlet through a pipeline near the adjacent air storage tank, the air storage tank is fixedly connected to a first electric push rod, the telescopic end of the first electric push rod is fixedly connected to a first sliding plate, the telescopic end of the first electric push rod is slidably connected to the adjacent air storage tank, and the first sliding plate is located at a relative The first sliding plate is fixedly connected with a symmetrically distributed fixed shell and a symmetrically distributed first pressure sensor, the fixed shell is slidably connected with a sliding member, the sliding member is fixedly connected with a second sliding plate on a side away from the adjacent fixed shell, the telescopic end of the first electric push rod is slidably connected with the adjacent second sliding plate, the second sliding plate is sealingly and slidably connected with the adjacent gas storage tank, an elastic member is fixedly connected between the second sliding plate and the adjacent first pressure sensor, the first sliding plate is provided with a locking mechanism for prohibiting the movement of the adjacent and symmetrically distributed sliding members, and a liquid pressure mechanism for actively promoting the flow of nylon solution is provided in the fixed tank.

[0005] Furthermore, the locking mechanism includes an electric rotating shaft, which is installed on the first sliding plate, and the electric rotating shaft is fixed with a symmetrically distributed multi-stage telescopic rod, and the telescopic end of the multi-stage telescopic rod is fixed with a rotating plate, and the rotating plate is rotatably connected to the adjacent sliding member, and 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 connected and matched.

[0006] Furthermore, the through holes uniformly distributed circumferentially on two adjacent sliding members correspond to each other one by one, and the through holes uniformly distributed on two adjacent rotating plates are staggered.

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

[0008] Furthermore, the liquid pressure mechanism includes a second electric push rod, which is fixedly connected to the upper side of the adjacent fixed tank, and the evaporation member includes an upper circular plate, a lower circular plate and evenly distributed evaporation tubes, and the upper circular plate and the lower circular plate jointly divide the cavity in the adjacent gas storage tank into a liquid inlet cavity, a steam cavity and a liquid outlet cavity from top to bottom in sequence, and the liquid inlet cavity and the adjacent liquid outlet cavity are connected through the adjacent and evenly distributed evaporation tubes, and the telescopic end of the second electric push rod is fixedly connected to a squeezing plate, and the squeezing plate is slidably connected to the adjacent fixed tank in the adjacent liquid inlet cavity, and the squeezing plate is provided with evenly distributed through holes, The evenly distributed through holes on the extrusion plate correspond to the adjacent evaporation tubes one by one, respectively; a liquid storage cylinder is fixedly connected in the through holes of the extrusion plate; the liquid storage 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; the telescopic end of the second electric push rod passes through the adjacent top plate; the upper circular plate and the adjacent extrusion plate are jointly provided with blocking components and liquid guiding components that are evenly distributed and correspond to the evaporation tubes one by one; the blocking components are used to block the flow path of the nylon solution entering the adjacent evaporation tube; the liquid guiding components are used to prompt the adjacent liquid storage cylinder to introduce the nylon solution into the adjacent evaporation tube.

[0009] Furthermore, the blocking component includes upper and lower fixed frames, which are respectively fixed to one side of the evaporator close to the adjacent evaporator tube and the adjacent through hole on the extrusion plate, and the lower side of the fixed frame is rotatably connected with a liquid guiding part, and the upper side of the liquid storage cylinder and the upper side of the adjacent evaporator tube are both equipped with electromagnetic blocking parts, and the electromagnetic blocking part is located on the lower side of the adjacent liquid guiding part and the two are sealed together.

[0010] Furthermore, the liquid guiding component includes an upper liquid guiding ring, which is fixedly connected to and communicated with the lower side of the adjacent liquid containing cylinder, and the fixed frame adjacent to the lower side of the liquid containing cylinder is fixedly connected with a lower liquid guiding ring, and the upper liquid guiding ring and the lower liquid guiding ring are connected through a flexible hose, and the lower side of the lower liquid guiding ring is rotatably connected and communicated with a liquid guiding tube group, and the liquid guiding tube group is connected with the adjacent evaporating tube, and the upper circular plate is provided with a power component for driving all the liquid guiding parts 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; Figure 2 It is a cross-sectional view of the fixed tank and the gas storage tank of the present invention; Figure 3 A cross-sectional view of the gas storage tank, the first sliding plate and the second sliding plate of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first sliding plate, the fixed shell and the second sliding plate of the present invention; Figure 5 An exploded view of the sliding member, the electric rotating shaft and the rotating plate of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the fixed tank, the extrusion plate and the top plate of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed tank, the second electric push rod and the rotating column of the present invention; Figure 8 It is a cross-sectional view of the evaporation tube, the fixing frame and the liquid guide member of the present invention; Fig. 9 An exploded view of the fixing frame, the liquid guiding member and the electromagnetic blocking member of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the evaporation tube, the fixing plate and the liquid scraping member of the present invention.

[0018] The meanings of the reference numerals in the figure are as follows: 1: fixed tank, 2: evaporation part, 3: gas storage tank, 4: first electric push rod, 5: first sliding plate, 6: fixed shell, 7: first pressure sensor, 8: sliding part, 9: second sliding plate, 10: elastic part, 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: squeezing plate, 24: liquid storage cylinder, 25: top plate, 26: fixed frame, 27: liquid guiding part, 28: electromagnetic blocking part, 29: upper liquid guiding ring, 30: lower liquid guiding ring, 31: liquid guiding tube group, 32: rotating column, 33: motor, 34: liquid blocking ring, 35: fixed plate, 36: scraping part, 37: second pressure sensor. DETAILED DESCRIPTION

[0019] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] Embodiment 1: Because when the existing MVR continuous cycle evaporation equipment is working, it is necessary to pass the steam generated by the previous stage evaporation into the compressor, and then pass the compressed steam into the next stage equipment through the compressor, so that the next stage equipment continues to distill the nylon solution. However, the steam efficiency and the amount of steam produced by the previous stage evaporation are unstable. If the steam generated by the equipment is directly passed into the compressor for compression, the quality of the steam produced by the compressor to the next stage equipment will be unstable, affecting the evaporation efficiency of the next stage equipment for the nylon solution.

[0021] In view of the above problems, the present invention proposes a MVR continuous circulation evaporation device for nylon single substance extraction. Figure 1-Figure 4 , including three evenly distributed fixed tanks 1, an external compressor and a control terminal. The three fixed tanks 1 are respectively 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 sequentially perform continuous distillation on the nylon solution. An evaporator 2 is fixedly connected in the fixed tank 1. The evaporator 2 comprises an upper circular plate, a lower circular plate and evenly distributed evaporation tubes 21. The evaporator 2 evaporates the nylon solution by allowing the nylon liquid on the upper side of the upper circular plate to flow into the adjacent evaporation tubes 21 and heating the evaporation tubes 21 by steam. The upper circular plate and the lower circular plate jointly divide the cavities in the adjacent gas storage tanks 3 from top to bottom into a liquid inlet chamber, a steam chamber and a liquid outlet chamber. The upper part of the left side of the liquid inlet chamber is connected to the existing liquid storage tank containing the nylon solution through a pipeline (the connection position is as shown in FIG. 1 ). Figure 2 As shown in the figure, the steam and concentrated liquid produced in the evaporation tube 21 are discharged downward into the liquid outlet cavity, and the concentrated nylon solution in the liquid outlet cavity is connected to the existing liquid pump through the lower pipe. The liquid pump is used to pump the concentrated nylon solution into the existing liquid storage tank. The liquid inlet cavity and the adjacent liquid outlet cavity are connected through adjacent and evenly distributed evaporation tubes 21. The outer side of the fixed tank 1 is fixedly connected to the gas storage tank 3, and the right side of the fixed tank 1 is connected to the adjacent gas storage tank 3 through a pipe (the connection position is shown in the figure). Figure 2 and Figure 3 As shown), and a one-way valve is installed at the connection between the two. The pipeline is connected to the steam chamber of the fixed tank 1, and the lower part of 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 to 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 to the adjacent compressor. The upper part of the right side of the fixed tank 1 is connected to the compressor outlet through a pipeline (the connection position is as shown Figure 1 and Figure 2As 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, a first sliding plate 5 is fixedly connected to the telescopic end of the first electric push rod 4, 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, the first sliding plate 5 is fixedly connected to a fixed shell 6 symmetrically distributed up and down and a first pressure sensor 7 symmetrically distributed and electrically connected to the control terminal, the fixed shell 6 is slidably connected to a sliding member 8, the sliding member 8 is composed of a support rod and a slide plate, the sliding member 8 is fixedly connected to a second sliding plate 9 on the side away from the adjacent fixed shell 6, the cavity in the gas storage tank 3 is divided into two gas storage cavities by the two second sliding plates 9, and the two gas storage cavities are respectively located on the two symmetrically distributed second sliding plates On the back side of 9, the second sliding plate 9 is used to detect the amount of steam generated, 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 to be discharged to the compressor, the telescopic end of the first electric push rod 4 is slidingly connected with the adjacent second sliding plate 9, the second sliding plate 9 is sealingly and slidingly connected with 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 adjacent and symmetrically distributed sliding members 8 is provided on the first sliding plate 5, a liquid pressure mechanism for actively promoting the flow of nylon solution is provided in the fixed tank 1, and the locking mechanism and the liquid pressure mechanism are both electrically connected to the control terminal.

[0022] Comparison 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 fixed with two multi-stage telescopic rods 12 symmetrically distributed up and down, the telescopic ends of the multi-stage telescopic rods 12 are fixed with 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 uniformly distributed through holes with the same diameter, the circumferentially uniformly distributed through holes on the two adjacent sliding members 8 correspond to each other one by one, and the uniformly distributed through holes on the two adjacent rotating plates 13 are staggered, that is, of the two symmetrical sliding members 8 at the same time, only one through hole on the sliding member 8 is connected to the through hole on the adjacent rotating plate 13.

[0023] Comparison Figure 1-Figure 3 A fixing column 14 is fixedly connected to the upper side of the second sliding plate 9 on the upper side of the first sliding plate 5. 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 that the efficiency of the upper and lower air storage chambers in discharging gas to the outside is the same, and further ensuring the stability of the air supply to the compressor. The pipelines connecting the air storage tank 3 on the first fixed tank 1 and the third fixed tank 1 and the compressor are fixedly connected with an electromagnetic three-way valve 15 electrically connected to the control terminal. The two electromagnetic three-way valves 15 are connected to each other, and are used to supplement the steam produced in the third fixed tank 1 to the compressor when the steam output in the first fixed tank 1 is seriously insufficient.

[0024] Comparison Figure 6-Figure 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, and a squeezing plate 23 is fixedly connected to the telescopic end of the second electric push rod 22. The squeezing plate 23 divides the liquid inlet cavity into an upper liquid inlet cavity and a lower liquid inlet cavity. The squeezing plate 23 is located in the liquid inlet cavity. The squeezing plate 23 is slidably connected to the adjacent fixed tank 1. The squeezing plate 23 is provided with evenly distributed through holes. The evenly distributed through holes on the squeezing plate 23 correspond to the adjacent evaporation tubes 21 one by one. A liquid storage cylinder 24 is fixedly connected in the through holes of the squeezing plate 23. The liquid storage cylinder 24 is used to collect the nylon solution adjacent to the upper side of the squeezing plate 23, which is convenient for the back The subsequent device discharges the nylon solution into the adjacent evaporation tube 21 on the lower side. 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 top plate 25 is located on the upper side of 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 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 and the liquid guiding components are both electrically connected to the control terminal. The blocking component is used to block the flow path of the nylon solution entering the adjacent evaporation tube 21, and the liquid guiding component is used to prompt the adjacent liquid storage cylinder 24 to introduce the nylon solution into the adjacent evaporation tube 21.

[0025] Comparison Figure 6-Figure 8 The blocking component includes a fixing frame 26 which is distributed up and down and is respectively fixed to one side of the evaporating member 2 close to the adjacent evaporating tube 21 and the adjacent through hole on the extrusion plate 23. The lower side of the fixing frame 26 is rotatably connected with a liquid guiding member 27. The liquid guiding member 27 is composed of a circular ring and three liquid guiding plates uniformly distributed in the circumferential direction. The upper side of the liquid storage cylinder 24 and the upper side of the adjacent evaporating tube 21 are both equipped with an electromagnetic blocking member 28 electrically connected to the control terminal. The electromagnetic blocking member 28 is composed of a push rod and a blocking circular ring. The electromagnetic blocking member 28 is sealed with the lower side of the adjacent liquid guiding member 27, thereby controlling the flow state of the adjacent nylon solution.

[0026] Comparison Figure 8-Figure 10 The liquid guiding component includes an upper liquid guiding ring 29 fixedly connected to and communicated with the lower side of the adjacent liquid storage cylinder 24, and a lower liquid guiding ring 30 is fixedly connected to the adjacent fixed frame 26 at the lower side of the liquid storage cylinder 24. The upper liquid guiding ring 29 and the lower liquid guiding ring 30 are connected 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 tube group 31, and the liquid guiding tube group 31 is connected to the adjacent evaporation tube 21. The upper circular plate is provided with a power component for driving all liquid guiding parts 27 to rotate, and the power component is electrically connected to the control terminal.

[0027] Comparison Figure 7-Figure 9The power assembly includes a rotating column 32 that is evenly distributed and corresponds to all the evaporation tubes 21 in the adjacent fixed tank 1. The rotating column 32 is rotatably connected to the top plate 25. The evenly distributed rotating columns 32 are all driven by a pulley belt (the transmission method is as follows Figure 7 As 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 is connected to the adjacent rotating column 32 through a gear rack transmission, which is used to drive all the rotating columns 32 to rotate together. The liquid guide 27 on the extrusion plate 23 is fixedly connected with magnets symmetrically distributed on the left and right (such as Fig. 9 As shown in the figure, a long strip magnet symmetrically distributed on the left and right is fixedly connected in the rotating column 32, and the magnet in the liquid guide part 27 on the extrusion plate 23 and the magnet in the adjacent rotating column 32 are magnetically attracted to each other, so that the rotating column 32 drives the adjacent liquid guide part 27 to rotate through its own magnet, and does not affect the relative sliding state between the rotating column 32 and the liquid guide part 27. The rotating column 32 is rotatably connected with the adjacent upper liquid guide ring 29 and the adjacent lower liquid guide ring 30, the rotating column 32 and the adjacent liquid guide tube group 31 are fixedly connected, the rotating column 32 and the adjacent liquid guide part 27 on the upper circular plate are fixedly connected, and a liquid blocking ring 34 is fixedly connected to the lower side of the liquid guide part 27 on the upper circular plate. The liquid blocking ring 34 is used to guide the adjacent nylon solution to avoid uneven spraying of the nylon solution between the adjacent liquid guide part 27 and the adjacent electromagnetic blocking part 28 into the adjacent evaporation tube 21.

[0028] When the staff evaporates and concentrates the extract (hereinafter referred to as nylon solution), the staff first passes the pre-prepared steam into the steam chamber of the first fixed tank 1 through the pipeline. After the steam enters the steam chamber of the first fixed tank 1, it heats the evaporation tube 21 on the adjacent evaporation element 2. The steam flows from the upper side of the steam chamber of the first fixed tank 1 to the lower side thereof. 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. The staff then 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 adjacent parts to move back and forth up and down. The extrusion plate 23 passes the adjacent pipeline on the left side to The nylon solution is drawn into the liquid inlet cavity of the first fixed tank 1 on the left side, and the motor 33 rotates by driving the adjacent rotating column 32. The rotating rotating column 32 drives all the rotating columns 32 in the first fixed tank 1 to rotate through the belt, and the rotating column 32 drives the adjacent liquid guide member 27 and the liquid guide tube group 31 to rotate. The liquid guide member 27 is used to promote the surrounding nylon solution to move toward the adjacent rotating column 32, so that the nylon solution can enter the adjacent evaporation tube 21 and the adjacent liquid storage cylinder 24. The rotation of the liquid guide tube group 31 is used to rotate and spray the nylon solution in the adjacent lower liquid guide ring 30 into the adjacent evaporation tube 21, so that the nylon solution is evenly distributed in the adjacent evaporation tube 21. Take the squeezing plate 23 first moving from bottom to top as an example: The remote control terminal controls the electromagnetic blocking piece 28 on the extrusion plate 23 to open, and the electromagnetic blocking piece 28 releases the seal between it and the adjacent liquid guiding piece 27 (at this time, the electromagnetic blocking piece 28 on the upper circular plate is still sealed with the adjacent liquid guiding piece 27). When the extrusion plate 23 moves upward, the adjacent lower liquid inlet cavity generates negative pressure, and the nylon solution is drawn from the existing liquid storage tank into the lower liquid inlet cavity of the first fixed tank 1 by the negative pressure. The gas in the upper liquid inlet cavity of the first fixed tank 1 passes through the upper liquid guiding ring 29, the lower liquid guiding ring 30 and the evaporation piece 2 and other components and is discharged downward. When the extrusion plate 23 moves to the uppermost end of the stroke, the extrusion plate 23 starts to move downward. At this time, the remote control terminal controls the electromagnetic blocking piece 28 on the upper circular plate to open, and at the same time closes the electromagnetic blocking piece 28 on the extrusion plate 23. During the downward movement of the extrusion plate 23, the nylon solution is extracted from the upper liquid inlet cavity according to the same principle. At the same time, the extrusion plate 23 squeezes the nylon solution in the lower liquid inlet cavity into the adjacent evaporation tube 21. Under the guidance of the liquid part 27, the liquid gathers at the adjacent evaporation tube 21, passes through the gap between the adjacent electromagnetic blocking part 28 and the adjacent liquid guiding part 27, and enters the adjacent evaporation tube 21. After the nylon solution enters the evaporation tube 21, it first contacts the liquid retaining ring 34. The liquid retaining ring 34 guides the nylon solution to a position close to the inner wall of the evaporation tube 21, promotes the nylon solution to flow downward close to the inner wall of the evaporation tube 21, and increases the evaporation efficiency of the nylon solution in the evaporation tube 21. The nylon solution evaporates to generate secondary steam. The secondary steam flows downward together with the concentrated nylon solution and finally enters the adjacent liquid outlet cavity. When the extrusion plate 23 moves to the lowest end of the stroke, the above steps are repeated in a cycle. When the extrusion plate 23 moves upward again, the nylon solution in the upper liquid inlet cavity is introduced into the adjacent liquid holding cylinder 24 by the adjacent liquid guiding member 27. The nylon solution passes through the adjacent upper liquid guiding ring 29 and the adjacent lower liquid guiding ring 30 and enters the adjacent liquid guiding tube group 31. The adjacent liquid guiding tube group 31 sprays the nylon solution toward the inner wall of the adjacent evaporation tube 21.

[0029] After the secondary steam enters the liquid outlet cavity of the first fixed tank 1, it is discharged into the gas storage tank 3 through the pipeline. The concentrated nylon solution is pumped into the existing liquid storage tank by the 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 simultaneously. The telescopic end of the first electric push rod 4 drives the adjacent first sliding plate 5 and adjacent parts to move slowly up and down. The following takes the movement of the leftmost first sliding plate 5 from top to bottom as an example: When the first sliding plate 5 moves from top to bottom, the control terminal controls the electric rotating shaft 11 to rotate a certain angle, and 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 its upper through hole is connected with the upper through hole of the adjacent sliding member 8, and the lower rotating plate 13 rotates a certain angle so that its upper through hole is staggered with the upper through hole of 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 negative pressure to be generated in the upper gas storage cavity. The secondary steam in the first fixed tank 1 is sucked into the gas storage cavity on the upper side of the gas storage tank 3 by the negative pressure, and the gas in the gas storage cavity on the lower side of the gas storage tank 3 is squeezed by the lower second sliding plate 9 and discharged to the compressor through the pipeline.

[0030] When the secondary steam in the first fixed tank 1 enters the air storage cavity on the upper side 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 upper second sliding plate 9 is subject to a small suction force of negative pressure. 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 subject to the suction force of negative pressure, and the second sliding plate 9 drives the adjacent sliding member 8 to slide upward relative to the adjacent fixed shell 6, and the adjacent multi-stage telescopic rods 12 are lengthened 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, and the upper second sliding plate 9 moves downward with the first sliding plate 5, and the upper first pressure sensor 7 detects the elastic force change of the adjacent elastic member 10, and transmits the signal to the control terminal, which uses this to record the evaporation efficiency in the current fixed tank 1 in real time.

[0031] When the first sliding plate 5 drives the two second sliding plates 9 to move downward and moves to the second sliding plate 9 on the lower side to contact the adjacent gas storage tank 3, the control terminal changes the moving direction of the telescopic end of the first electric push rod 4, and the telescopic end of the first electric push rod 4 drives the first sliding plate 5 and the adjacent parts to move upward. At this time, the control terminal controls the electric shaft 11 to rotate and reset, and the electric shaft 11 drives the two rotating plates 13 to rotate and reset through the two adjacent multi-stage telescopic rods 12. At this time, the through hole of the upper rotating plate 13 is staggered with the through hole on the adjacent sliding member 8, and the through hole of the lower rotating plate 13 is staggered with the through hole on the adjacent sliding member 8. The upper through hole is connected, and 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 resets together with the adjacent sliding member 8, and the secondary steam in the upper air storage chamber is evenly squeezed toward the compressor.

[0032] When the gas storage tank 3 passes secondary steam into the compressor, the staff starts the compressor through the control terminal at the same time. The compressor works on the secondary steam, converts the secondary steam into high-temperature and high-pressure high-quality steam, and passes the high-quality steam into the steam chamber of the second fixed tank 1 and the steam chamber of the third fixed tank 1, and heats the evaporation element 2 in the second fixed tank 1 and the evaporation element 2 in the third fixed tank 1. At this time, the staff starts the electric control unit in the second fixed tank 1 and the electric control unit in the third fixed tank 1 in sequence through the control terminal in the same way as above, and draws the concentrated nylon solution discharged from the first fixed tank 1 into the second fixed tank 1 for re-evaporation. The concentrated nylon solution discharged from the second fixed tank 1 The liquid is discharged into the third fixed tank 1 for evaporation, and the concentrated nylon solution discharged from the third fixed tank 1 is collected. The steam generated after evaporation again in the second fixed tank 1 is passed into the adjacent gas storage tank 3, and the steam collected in the gas storage tank 3 is passed into the first fixed tank 1 after doing work in the compressor, replacing the prepared steam to heat the evaporation element 2 in the first fixed tank 1. The small amount of steam evaporated in the third fixed tank 1 is passed into the adjacent gas storage tank 3 and discharged to the outside 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 amount of steam filled into the compressor by the first fixed tank 1.

[0033] 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, and then the staff successively introduces 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.

[0034] Example 2: Control Fig. 9 and Fig.10 , and also includes detection mechanisms that are evenly distributed and respectively arranged in adjacent evaporation tubes 21, the detection mechanisms are used to detect whether the nylon solution is evenly distributed in the adjacent evaporation tubes 21, the detection mechanisms include a fixed plate 35 fixedly connected to the lower side of the adjacent rotating column 32, a scraper 36 is slidably connected to the left side of the fixed plate 35, the scraper 36 is formed by fixing a slide plate and an arc frame, the scraper 36 is fixedly connected to a second pressure sensor 37, the second pressure sensor 37 and the scraper 36 are both fixedly connected to a spring between the adjacent fixed plate 35, there is a gap between the scraper 36 and the adjacent evaporation tube 21, which is used to scrape the nylon solution to the thickness of the gap, thereby ensuring that the nylon solution flows evenly downward in the adjacent evaporation tubes 21.

[0035] When the rotating column 32 rotates, the rotating column 32 pushes the adjacent scraper 36 to rotate together through the fixed plate 35 and the spring thereon, and the scraper 36 scrapes the nylon solution on the inner wall of the adjacent evaporation tube 21, promoting the nylon solution sprayed from the adjacent liquid guide tube group 31 to adhere to the tube wall of the adjacent evaporation tube 21 more evenly and flow downward. When the viscosity of the nylon solution in the second fixed tank 1 and the third fixed tank 1 gradually increases, the nylon solution may not be able to evenly cover the inner wall of the adjacent evaporation tube 21. At this time, the resistance of the scraper 36 to scrape the nylon solution during the movement will gradually change. If the inner wall of the adjacent evaporation tube 21 is less adhered to the nylon solution, the resistance encountered by the scraper 36 when moving is small, and the spring on the fixed plate 35 is The elastic force is proportional to the resistance encountered by the adjacent 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 is unevenly distributed on the inner walls of more than half of the evaporation tubes 21, it may be that the viscosity of the nylon solution is too high, and the pressure exerted on the nylon solution by the adjacent extrusion plate 23 is relatively small, resulting in less nylon solution entering the adjacent evaporation tube 21. At this time, the control terminal appropriately speeds up the movement speed of the telescopic end of the second electric push rod 22 at this location, and then controls the extrusion plate 23 at this location to squeeze the adjacent nylon solution with a greater pressure to flow into the adjacent evaporation tube 21, thereby promoting uniform distribution of the nylon solution in the evaporation tube 21.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution 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 evaporating element (2) comprising an upper circular plate, a lower circular plate and uniformly distributed evaporating tubes (21), the upper circular plate and the lower circular plate jointly dividing the inner cavity of the adjacent gas storage tank (3) 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 evaporating 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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