Membrane stacked type continuous cooling crystallizer

Abstract

The utility model relates to a diaphragm stacking type continuous cooling crystallizer which is provided with a crystallization kettle, the crystallization kettle comprises an upper kettle body, a lower kettle body and a middle kettle body, the middle kettle body comprises at least one connecting kettle, a feeding pipe is arranged on the upper kettle body, a discharging pipe is arranged on the lower kettle body, a driving motor is arranged on the upper kettle body, and a driving shaft is arranged in the crystallization kettle. Membrane frames are arranged in the upper kettle body, the connecting kettles and the lower kettle body, the membrane frames are installed on a driving shaft, jackets are arranged on the outer walls of the upper kettle body, the connecting kettles and the lower kettle body, first liquid inlet pipes and first liquid outlet pipes are arranged on the jackets, butt joint heat exchange flanges are arranged between the middle kettle body and the upper kettle body and between the connecting kettles, and the butt joint heat exchange flanges are connected with the connecting kettles. A heat exchange cavity is formed in the butt joint heat exchange flange, a second liquid inlet pipe and a second liquid outlet pipe are arranged on the butt joint heat exchange flange, the upper end of the middle kettle body is in sealed connection with the upper kettle body, the connecting kettles are in sealed connection, and the middle kettle body is in sealed connection with the lower kettle body. The utility model has the advantages of ingenious structure, better universality, convenience and practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cooling crystallization field, especially involves the membrane piece stack type continuous cooling crystallizer. BACKGROUND

[0002] Cooling crystallizer is a kind of equipment that makes material crystallize by reducing the temperature of material, and its working principle involves heat transfer and substance transfer process, when the solute in solution is supersaturated, crystallizer promotes solute to crystallize and deposit into solid particles by controlling temperature.Cooling crystallizer can be divided into internal circulation cooling type and external circulation cooling type crystallizer according to its cooling form.

[0003] The existing cooling crystallizer is customized according to the actual use environment, and the crystallizer is prepared after the size of the crystallizer is determined, but with the change of different use environment and use scene, it needs to prepare a variety of different size of crystallizer, and the preparation cost is higher, the universality is poor, and it is not convenient to transport, install and disassemble the crystallizer, which is very inconvenient. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing membrane piece stack type continuous cooling crystallizer, clever structure can prepare different size of crystallizer according to actual use environment and use scene, has good adjustable and universality, convenient and practical.

[0005] The technical scheme for realizing the purpose of the utility model is: the utility model has a crystallization kettle, the crystallization kettle comprises an upper kettle body, a lower kettle body coaxially arranged with the upper kettle body and an intermediate kettle body arranged between the upper kettle body and the lower kettle body, the intermediate kettle body comprises at least one connecting kettle coaxially arranged with the upper kettle body, the upper kettle body is provided with a feeding pipe, the lower kettle body is provided with a discharging pipe, the upper kettle body is further provided with a driving motor, the crystallization kettle is provided with a driving shaft arranged in the crystallization kettle and capable of rotating under the driving of the driving motor, the driving shaft is coaxially arranged with the crystallization kettle, the upper kettle body, each connecting kettle and the lower kettle body are all provided with diaphragm frames capable of stirring the feed, each diaphragm frame is installed on the driving shaft and stirs the feed along with the rotation of the driving shaft, the outer walls of the upper kettle body, each connecting kettle and the lower kettle body are all provided with jackets, the jacket on the upper kettle body, the jacket on each connecting kettle and the jacket on the lower kettle body all form condensation cavities with the outer walls of the upper kettle body, the connecting kettle and the lower kettle body, the jackets are provided with first liquid inlet pipes capable of inputting condensing medium into the condensation cavities and first liquid outlet pipes capable of discharging the condensing medium in the condensation cavities, the intermediate kettle body and the upper kettle body and each connecting kettle are all provided with butt joint heat exchange flanges capable of increasing the heat exchange area and guiding the sliding of the crystallization after condensation, the butt joint heat exchange flanges are funnel-shaped, the butt joint heat exchange flanges are provided with heat exchange cavities capable of containing condensing medium, the butt joint heat exchange flanges are provided with second liquid inlet pipes capable of inputting condensing medium into the cavities of the butt joint heat exchange flanges and second liquid outlet pipes capable of discharging the condensing medium in the cavities of the butt joint heat exchange flanges, the upper end of the intermediate kettle body is sealingly connected with the upper kettle body through the butt joint heat exchange flanges and is fixedly connected with the upper kettle body through locking pieces, each connecting kettle is also sealingly connected through the butt joint heat exchange flanges and is fixed through locking pieces, the lower end of the intermediate kettle body is sealingly connected with the lower kettle body and is fixed through locking pieces.

[0006] Further, the diaphragm frame comprises a first connecting shaft sleeve and a second connecting shaft sleeve detachably mounted on the driving shaft, and a side frame symmetrically arranged on both sides of the first connecting shaft sleeve along the axis of the first connecting shaft sleeve, the first connecting shaft sleeve and the second connecting shaft sleeve are coaxially arranged with the driving shaft, the side frame comprises an upper diaphragm plate integrally formed with the first connecting shaft sleeve, a lower diaphragm plate integrally formed with the second connecting shaft sleeve, and a side diaphragm plate for connecting the upper diaphragm plate and the lower diaphragm plate, each side diaphragm plate is provided with a plurality of side scraper groups capable of scraping off frost or crystals on the inner wall of the upper kettle body or the inner wall of the connecting kettle or the inner wall of the lower kettle body, the side scraper groups on each side diaphragm plate are centrally symmetrically arranged, each side scraper group comprises a plurality of side scrapers, each side scraper on the side diaphragm plate on one side of the driving shaft is staggered with each side scraper on the side diaphragm plate on the other side of the driving shaft, each lower diaphragm plate is provided with a lower scraper group capable of scraping off frost and crystals on the upper end face of the butt joint heat exchange flange, each lower scraper group on each lower diaphragm plate is centrally symmetrically arranged, the lower scraper group comprises a plurality of lower scrapers, each lower scraper on the lower diaphragm plate on one side of the driving shaft is staggered with each lower scraper on the lower diaphragm plate on the other side of the driving shaft, each upper diaphragm plate in each connecting kettle is provided with an upper scraper group capable of scraping off frost and crystals on the lower end face of the butt joint heat exchange flange, each upper scraper group on each upper diaphragm plate is centrally symmetrically arranged, each upper scraper on the upper diaphragm plate on one side of the driving shaft is staggered with each upper scraper on the upper diaphragm plate on the other side of the driving shaft, each upper scraper, each side scraper, and each side scraper on the side frame are arranged on the same side of the side frame.

[0007] Further, the driving shaft is provided with a first wedge-shaped connecting block matched with the first connecting shaft sleeve and a second wedge-shaped connecting block matched with the second connecting shaft sleeve, the first connecting shaft sleeve is provided with a first wedge-shaped through hole, the second connecting shaft sleeve is provided with a second wedge-shaped through hole, the first connecting shaft sleeve is connected with the driving shaft through the cooperation of the first wedge-shaped through hole and the first wedge-shaped connecting block, and is fixed on the driving shaft through a locking piece, the second connecting shaft sleeve is connected with the driving shaft through the cooperation of the second wedge-shaped through hole and the second wedge-shaped connecting block, and is fixed on the driving shaft through a locking piece, the diaphragm frame is fixedly connected with the driving shaft through the cooperation of the first connecting shaft sleeve and the driving shaft, and the cooperation of the second connecting shaft sleeve and the driving shaft.

[0008] Further, each upper scraping plate, each side scraping plate and each lower scraping plate comprises a mounting base, a connecting plate body rotatably connected to the mounting base, and a scraping plate part detachably mounted on the connecting plate body, a scraping slope is arranged on a side of the scraping plate part away from the connecting plate body, the scraping plate part extends from one side of the connecting plate body to the other side of the connecting plate body, a connecting slot is arranged on the connecting plate body, the width of the slot opening of the connecting slot is smaller than the width of the slot bottom, the connecting slot extends from one side of the connecting plate body to the other side of the connecting plate body, a plug-in plate body is arranged on the scraping plate part and integrally formed with the scraping plate part, the plug-in plate body extends from one side of the scraping plate part to the other side of the scraping plate part, the scraping plate part is connected with the connecting plate body through the cooperation of the plug-in plate body and the connecting slot, and is fixedly mounted on the rotating plate body through a locking part, each connecting plate body is limited to press against the side frame in the process of rotation of the driving shaft, and each scraping plate part forms linear contact with the inner wall of the connecting kettle, the inner wall of the lower kettle body, and the upper end face and the lower end face of the butt joint heat exchange flange.

[0009] Further, the butt joint heat exchange flange comprises a heat exchange flange part and a heat exchange part integrally formed with the heat exchange flange part and in a funnel shape, each heat exchange part is provided with an inner hole through which the driving shaft passes, the heat exchange cavity is arranged in the heat exchange part, and the heat exchange cavity is annular, the second liquid inlet pipe communicates with the heat exchange cavity after passing through the heat exchange flange part, and the second liquid outlet pipe communicates with the heat exchange cavity after passing through the heat exchange flange part, the heat exchange cavity is provided with annular first and second partition plates, the first and second partition plates are coaxially arranged with the driving shaft, and the diameter of the second partition plate is greater than that of the first partition plate, the heat exchange cavity is divided into first, second and third heat exchange cavities by the first and second partition plates, the first partition plate is provided with a plurality of shunt holes distributed thereon along the circumference of the axis of the driving shaft, and the second partition plate is also provided with a plurality of shunt holes distributed thereon along the circumference of the axis of the driving shaft, the first, second and third heat exchange cavities communicate through the shunt holes.

[0010] Further, the second liquid inlet pipe is connected with a liquid injection pipe, the liquid injection pipe is fixed on the first and second partition plates, one end of the liquid injection pipe communicates with the second liquid inlet pipe, the other end of the liquid injection pipe extends into the first heat exchange cavity after passing through the second partition plate and the first partition plate, and communicates with the first heat exchange cavity.

[0011] Further, the diaphragm frame comprises a first connecting shaft sleeve and a second connecting shaft sleeve detachably mounted on the driving shaft, and a side frame symmetrically arranged on both sides of the first connecting shaft sleeve along the axis of the first connecting shaft sleeve, the first connecting shaft sleeve and the second connecting shaft sleeve are coaxially arranged with the driving shaft, the side frame comprises an upper diaphragm plate integrally formed with the first connecting shaft sleeve, a lower diaphragm plate integrally formed with the second connecting shaft sleeve, and a side diaphragm plate for connecting the upper diaphragm plate and the lower diaphragm plate, the upper diaphragm plate of each connecting kettle is provided with a positioning plate, the positioning plate is provided with a side pressing plate, and the side scraping groove on the side pressing plate is arranged on the side pressing plate, the side scraping groove on the side pressing plate is pressed on the hole wall of the inner hole of the heat exchange part, and the side scraping groove on the side pressing plate is scraped off the frost and crystals on the hole wall of the inner hole of the heat exchange part through the rotation of the diaphragm frame.

[0012] Further, the upper kettle body is provided with a first flange part, the upper end of each connecting kettle is provided with a second flange part, the lower end of each connecting kettle is provided with a third flange part, the lower kettle body is provided with a fourth flange part, the upper and lower end faces of the first flange part, the second flange part, the third flange part, the fourth flange part, and the heat exchange flange part are provided with connecting bosses, each connecting boss is coaxially arranged with the driving shaft, the connecting bosses on the first flange part, the second flange part, and the third flange part are provided with connecting ring grooves coaxially arranged with the connecting bosses, the upper end face and the lower end face of the heat exchange flange part, and the fourth flange part are provided with connecting bosses coaxially arranged with the connecting bosses, the upper end of the upper kettle body and the upper end of the intermediate kettle body are sealingly connected with the butt joint heat exchange flange through the plug-in cooperation of the connecting bosses on the upper end face of the heat exchange flange part and the connecting ring grooves on the first flange part, and the plug-in cooperation of the connecting bosses on the lower end face of the heat exchange flange part and the connecting ring grooves on the second flange part closest to the upper kettle body, and are fixed through locking members, each adjacent connecting kettle is sealingly connected with the butt joint heat exchange flange through the plug-in cooperation of the connecting ring grooves on the third flange part and the connecting bosses on the upper end face of the heat exchange flange part, and the plug-in cooperation of the connecting bosses on the lower end face of the heat exchange flange part and the connecting ring grooves on the second flange part on the adjacent connecting kettle, and are fixed through locking members, and the lower kettle body is sealingly connected with the connecting kettle closest to the lower kettle body through the plug-in cooperation of the connecting bosses on the fourth flange part and the connecting ring grooves on the third flange part on the connecting kettle closest to the lower kettle body, and is fixed through locking members.

[0013] Further, the upper kettle body is provided with a connecting bottom plate, the connecting bottom plate is fixedly provided with a connecting support, the driving motor is fixedly installed on the connecting support, the output end of the driving motor is fixedly provided with a transmission shaft coaxially arranged with the driving shaft, the connecting support is fixedly provided with a bearing seat, the bearing seat is provided with a plurality of transmission bearings coaxially arranged with the transmission shaft, each transmission bearing on the bearing seat is sleeved on the transmission shaft, the connecting bottom plate is provided with a mechanical seal coaxially arranged with the transmission shaft, the transmission shaft is connected with the driving shaft after penetrating through the mechanical seal, the connecting bottom plate and the upper kettle body, and the connecting flanges are arranged between the transmission shaft and the driving shaft.

[0014] Further, the bottom of the lower kettle body is provided with a discharging kettle coaxially arranged with the lower kettle body and in communication, the side wall of the discharging kettle is provided with an aeration pipe in communication, one end of the driving shaft is connected with the transmission shaft through the connecting flange, the other end of the driving shaft is rotatably connected in the discharging kettle, the discharging pipe is arranged on the discharging kettle and in communication with the discharging kettle, the discharging pipe is arranged at the bottom of the discharging kettle, the diaphragm frame is also arranged in the discharging kettle, the diaphragm frame is rotated in the discharging kettle and stirs the feed through the driving of the driving motor on the transmission shaft and the connection between the transmission shaft and the driving shaft.

[0015] The utility model discloses have positive effect: (1) the utility model discloses through setting up crystallization kettle into the connection of upper kettle body, lower kettle body and intermediate kettle body, and setting up intermediate kettle body into the splicing of the coaxial connection of multiple connecting kettle, the size of intermediate kettle body can change according to actual use environment and use scene, at the same time, setting up intermediate kettle body into the connection of multiple connecting kettle, can be convenient for intermediate kettle body and upper kettle body and lower kettle body install and dismantle, on the other hand, also facilitate crystallization kettle transport, in addition, setting up intermediate kettle body into the connection of multiple connecting kettle, can realize crystallization kettle transport to use scene after processing site processing, or also can directly splice on the spot, have better universal and applicability, set up condensing cavity on upper kettle body, each connecting kettle and lower kettle body, after inputting heat exchange medium in condensing cavity, through upper kettle body, each connecting kettle and lower kettle body, carry out multiple continuous cooling to feed, set up butt joint heat exchange flange between intermediate kettle body and upper kettle body and between each connecting kettle, through butt joint heat exchange flange, can guarantee the tightness of connection between upper kettle body and intermediate kettle body and between each connecting kettle, on the other hand, through setting up butt joint heat exchange flange, can increase the overall heat exchange area, funnel-shaped setting can guide the transfer of the condensed frost or crystallization that hangs, guarantee the continuous multiple segment cooling crystallization of feed at the same time, also greatly improve the efficiency of crystallization precipitation and the precipitation rate of feed crystallization, the structure is ingenious, convenient and practical.

[0016] (2) The utility model discloses a symmetrical side frame is arranged on the both sides of first connecting shaft sleeve and second connecting shaft sleeve, sets up a plurality of upper scraping plates on the upper membrane plate, sets up a plurality of lower scraping plates on the lower membrane plate, each upper scraping plate on the both sides upper membrane plate is staggered arrangement, the upper end surface and the lower end surface of the butt joint heat exchange flange are scraped to remove the frost and crystallization comprehensively through each upper scraping plate and lower scraping plate, set up a plurality of side scraping plates on each side membrane plate, each side scraping plate on each side membrane plate is staggered arrangement, can comprehensively scrape to remove the frost and crystallization of the side of upper kettle body, each connecting kettle and lower kettle body, the upper scraping plate, side scraping plate and lower scraping plate on one side frame are arranged on the same side of side frame, and the upper scraping plate, side scraping plate and lower scraping plate on the opposite side frame are centrally symmetric, can be in the process of driving shaft rotation, synchronously and comprehensively scrape to remove the frost and crystallization of the upper and lower end surface of butt joint heat exchange flange, the inner wall of upper kettle body, the inner wall of connecting kettle and the inner wall of lower kettle body.

[0017] (3) The utility model discloses a first wedge connecting block and second wedge connecting block are seted up on the driving shaft, first wedge through -hole is seted up on the first connecting shaft sleeve, second wedge through -hole is seted up on the second connecting shaft sleeve, the diaphragm frame is through the insertion joint of first wedge connecting block and first wedge through -hole, and the insertion joint of second wedge connecting block and second wedge through -hole, can detachable with driving shaft fixed connection, after being fixed through locking member, the stability and firmness of the connection between diaphragm frame and driving shaft are guaranteed, convenient diaphragm frame stable installation also is convenient diaphragm frame's quick dismounting and replacement, convenient and practical.

[0018] (4) The utility model discloses a cooperation of installing seat, connecting plate body and scraping plate part through setting up upper scraping plate, side scraping plate and lower scraping plate, through setting up scraping material bevel, thereby make each scraping plate part and the inner wall of connecting kettle, the inner wall of lower kettle body and the upper end surface and the lower end surface of butt joint heat exchange flange form line contact, thereby form line contact, on one hand can when just contact of scraping plate part and the inner wall of connecting kettle, the inner wall of lower kettle body and the upper end surface and the lower end surface of butt joint heat exchange flange, based on line contact to increase the pressure of scraping plate part to the inner wall of connecting kettle, the inner wall of lower kettle body and the upper end surface and the lower end surface of butt joint heat exchange flange, avoid the problem of incomplete scraping of scraping plate part and the inner wall of connecting kettle, lower kettle body and upper kettle body, the width of the upper slot of connecting slot is seted up to be less than the width of groove bottom, make the cross section of connecting slot be wedge -shaped, set up connecting slot, insertion plate body and scraping plate part to be equal length, on one hand can convenient scraping plate part's quick installation, dismounting and replacement, on the other hand in the process of scraping plate part installation and dismounting, can be inserted through insertion plate body from the side of connecting slot, and fixed connection is carried out with connecting plate body after being fixed through locking member, can effectively prevent scraping plate part from coming off in the process of scraping, guarantee the stability and safety of scraping plate part and connecting plate body after being connected.

[0019] (5) The utility model discloses a heat exchange flange is set to the cooperation of heat exchange flange part and heat exchange part, and the heat exchange part is funnel -shaped, can increase the heat exchange area of whole on one hand through the heat exchange part, and the flow of crystallization is oriented, and the heat exchange cavity is separated into first heat exchange cavity, second heat exchange cavity and third heat exchange cavity through first partition and second partition, through separating multiple heat exchange cavities, and first heat exchange cavity, second heat exchange cavity and third heat exchange cavity are sequentially arranged from low to high, in the process of guiding crystallization in the heat exchange part, on one hand, guarantee the effciency of crystallization in the heat exchange part, on the other hand, in the process of guiding crystallization in the heat exchange part, avoid crystallization to melt into feed again, guarantee the quality of crystallization.

[0020] (6) The utility model discloses setting the liquid injection pipe on the second liquid inlet pipe, injecting the condensing medium into the first heat exchange cavity through the liquid inlet pipe, and the condensing medium in the first heat exchange cavity enters the second heat exchange cavity and the third heat exchange cavity in turn through the shunt hole. The condensing medium enters the first heat exchange cavity for heat exchange, and then enters the second heat exchange cavity and the third heat exchange cavity for heat exchange treatment. On one hand, after the condensing medium is injected into the first heat exchange cavity, the heat exchanged condensing medium can be partially heat exchanged in the second heat exchange cavity and the third heat exchange cavity. After the heat exchange in the first heat exchange cavity is completed, the continuously injected condensing medium enters the second heat exchange cavity and then the third heat exchange cavity for heat exchange. After the heat exchange in the second heat exchange cavity is completed, the condensing medium enters the third heat exchange cavity. On one hand, the condensing medium can be fully and efficiently heat exchanged in the heat exchange cavity, improving the heat exchange efficiency. On the other hand, the heat exchange cavity is not separated and the condensing medium is not injected from the bottom. After the condensing medium is injected from the second liquid inlet pipe, it is discharged from the second liquid outlet pipe after partial heat exchange. The condensing medium cannot be fully utilized. Therefore, by separating and injecting the condensing medium from the first heat exchange layer, the efficiency can be improved, and the utilization rate of the condensing medium can also be improved.

[0021] (7) The utility model discloses setting the positioning plate on the upper membrane plate, setting the side pressing plate on the positioning plate, setting the side scraping groove on the side pressing plate, and scraping the frost and crystallization on the inner hole wall at the bottom end of the heat exchange part when the side scraping plate rotates with the driving shaft. When the driving shaft is not rotating, the heat exchange part is supported, thereby ensuring the stability of the butt joint heat exchange flange during heat exchange and crystallization.

[0022] (8) The utility model discloses setting the connection ring groove and the connection convex ring to seal and connect the upper end of the upper kettle body and the intermediate kettle body, each connection kettle, and the lower single of the intermediate kettle body and the lower kettle body, and fixing them after the seal connection through the locking piece, thereby ensuring the sealing property of the crystallization kettle and the stability of the crystallization kettle, which is convenient and practical.

[0023] (9) The utility model discloses a connecting bottom plate, connecting support and mechanical seal are set up on the upper kettle body, and the stability of driving motor installation is guaranteed through connecting support, a plurality of transmission bearings are set up on the bearing seat, and the flange is set up between transmission shaft and driving shaft, and the smoothness of transmission shaft rotation, and the high efficiency, stability and sealing property of transmission between transmission shaft and driving shaft are guaranteed.

[0024] (10) The utility model discloses setting the discharging kettle on the bottom of lower kettle body, setting the aeration pipe on the discharging kettle, when the discharging pipe is blocked, can pass into gas or liquid through the aeration pipe to carry out pipeline dredging to the discharging pipe, thereby guaranteeing the smoothness of crystallization discharge. DRAWINGS

[0025] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further detailed, wherein

[0026] Figure 1 It is the whole structure schematic diagram of membrane sheet stack type continuous cooling crystallizer in the utility model,

[0027] Figure 2 It is the sectional view of the whole structure of membrane sheet stack type continuous cooling crystallizer in the utility model,

[0028] Figure 3 It is the sectional view of the connecting structure of driving motor and connecting support in the utility model,

[0029] Figure 4 It is the sectional view of the connecting structure of upper kettle body and connecting kettle in the utility model,

[0030] Figure 5 It is Figure 4 the enlarged view of A in the utility model,

[0031] Figure 6 It is the sectional view of the whole structure of connecting kettle and membrane sheet frame in the utility model,

[0032] Figure 7 It is the sectional view of the whole structure of first connecting shaft sleeve and first wedge connection in the utility model,

[0033] Figure 8 It is the sectional view of the whole structure of second connecting shaft sleeve and second wedge connection in the utility model,

[0034] Figure 9 It is the explosion drawing of the connecting structure of scraper and connecting plate body in the utility model,

[0035] Figure 10 It is the whole structure schematic diagram of butt joint heat exchange flange in the utility model,

[0036] Figure 11 It is the cross section view of the overall structure of the butt joint heat exchange flange in the utility model;

[0037] Figure 12 It is the cross section view of the overall structure of the butt joint heat exchange flange in the utility model; Figure 11 It is the enlarged view of B in the utility model;

[0038] Figure 13 It is the cross section view of the overall structure of the butt joint heat exchange flange in the utility model; DETAILED DESCRIPTION

[0039] See Figures 1 to 13The utility model discloses a crystallization kettle, the crystallization kettle includes each other intercommunication's upper kettle body 1, with the coaxial setting of upper kettle body 1's lower kettle body 3, and the intermediate kettle body of setting between upper kettle body 1 and lower kettle body 3, the intermediate kettle body includes at least one with the coaxial setting of upper kettle body 1's connecting kettle 2, be equipped with feed pipe 11 on upper kettle body 1, be equipped with discharge pipe 41 on lower kettle body 3, still be equipped with the overflow port that can prevent the fullness of the feed in crystallization kettle and overflow on upper kettle body 1, still be equipped with drive motor 6 on upper kettle body 1, be equipped with the drive shaft 10 that can be set in crystallization kettle under the drive of drive motor 6 and rotate in crystallization kettle, the drive shaft 10 is coaxial with crystallization kettle and sets up, all be equipped with the diaphragm frame 9 that can stir the feed in upper kettle body 1, each connecting kettle 2 and lower kettle body, each diaphragm frame 9 is installed on drive shaft 10 and stirs the feed along with the rotation of drive shaft 10, the sidewall of upper kettle body 1 and connecting kettle 2 all are equipped with manhole c for overhauling and assembling, be equipped with the sight glass d that can inspect the stirring and crystallization in crystallization kettle in manhole c, manhole c and the sidewall of upper kettle body 1 and connecting kettle 2 dead angle fit, the crystallization on the inner wall of sight glass d can be scraped by diaphragm frame 9, guarantee that the inner wall of sight glass d is not adhered with crystallization, the outer wall of upper kettle body 1, each connecting kettle 2 and lower kettle body 3 all are equipped with the jacket 7, the jacket 7 on upper kettle body 1 and the outer wall of upper kettle body 1, the jacket 7 on connecting kettle 2 and the outer wall of connecting kettle 2, and the jacket 7 on lower kettle body 3 and the outer wall of lower kettle body 3 all form condensation cavity 70, be equipped with the first liquid inlet pipe 71 that can input condensing medium into condensation cavity 70 and the first liquid outlet pipe 72 that can discharge the condensing medium in condensation cavity 70 on the jacket 7, the intermediate kettle body and upper kettle body 1 between, and each connecting kettle 2 between all are equipped with the butt joint heat exchange flange 8 that can increase the heat exchange area and can slide guide after the crystallization of condensation, the butt joint heat exchange flange 8 is funnel-shaped, is equipped with the heat exchange cavity 80 that can hold condensing medium in the butt joint heat exchange flange 8, be equipped with the second liquid inlet pipe 81 that can input condensing medium into the inner chamber of butt joint heat exchange flange 8 and the second liquid outlet pipe 82 that can discharge the condensing medium in the inner chamber of butt joint heat exchange flange 8 on the butt joint heat exchange flange 8, the upper end of intermediate kettle body is sealedly connected with upper kettle body 1 through butt joint heat exchange flange 8, and is fixedly connected with upper kettle body 1 through locking piece, each connecting kettle 2 is also sealedly connected through butt joint heat exchange flange 8 and is fixed through locking piece, the lower end of intermediate kettle body is sealedly connected with lower kettle body 3 and is fixed through locking piece.

[0040] By injecting condensing medium in the condensing cavity 70, the upper kettle body 1, each connecting kettle 2 and the lower kettle body 3 become a heat exchange chamber arranged in series one by one, and the feed input from the feed pipe 11 enters the upper kettle body 1, each connecting kettle 2 and the lower kettle body 3 in turn, and the heat exchange is carried out continuously and repeatedly in the process, thereby greatly improving the precipitation rate of the crystals in the feed, and by setting the butt joint heat exchange flange 8 and setting the butt joint heat exchange flange 8 into a funnel shape, the overall heat exchange area in the upper kettle body 1, each connecting kettle 2 and the lower kettle body 3 is increased, the heat exchange efficiency of the feed is greatly improved by increasing the heat exchange area, and the precipitation rate of the crystals in the feed is further improved.

[0041] At the same time, the crystallization kettle is provided with the upper kettle body 1, the lower kettle body 3 and the intermediate kettle body, the size of the intermediate kettle body can be adapted according to the actual use environment and use scene, which can effectively ensure the continuous heat exchange crystallization of the feed in the crystallization kettle, and effectively solve the problems of poor universality and affecting the overall transportation and installation and disassembly in the prior art, and has good adjustability and universality.

[0042] A plurality of connecting struts 12 distributed along the axis of the upper kettle body 1 are arranged on the outer wall of the upper kettle body 1, and the entire crystallization kettle is fixedly connected with the external rack through the connecting struts 12, so as to ensure the stability of the crystallization kettle as a whole.

[0043] The butt joint heat exchange flange 8 between the upper kettle body 1 and the connecting kettle 2 closest to the upper kettle body 1 is arranged between the diaphragm frames 9 of the upper kettle body 1 and the connecting kettle 2, and the butt joint heat exchange flanges 8 between each connecting kettle 2 are arranged between the diaphragm frames 9 in each connecting kettle 2, so as to effectively avoid the interference between the diaphragm frames 9 and the butt joint heat exchange flanges 8 during rotation.

[0044] The diaphragm frame 9 comprises a first connecting sleeve 901 and a second connecting sleeve 902 detachably mounted on the driving shaft 10, and a side frame symmetrically arranged on both sides of the first connecting sleeve 901 along the axis of the first connecting sleeve 901, the first connecting sleeve 901 and the second connecting sleeve 902 are coaxially arranged with the driving shaft 10, the side frame comprises an upper membrane plate 91 integrally formed with the first connecting sleeve 901, a lower membrane plate 93 integrally formed with the second connecting sleeve 902, and a side membrane plate 92 for connecting the upper membrane plate 91 and the lower membrane plate 93, each side membrane plate 92 is provided with a plurality of side scraper groups for scraping the frost or crystals on the inner wall of the upper kettle body 1 or the inner wall of the connecting kettle 2 or the inner wall of the lower kettle body 3, the side scraper groups on each side membrane plate 92 are centrally symmetrically arranged, each side scraper group comprises a plurality of side scrapers 95, each side scraper 95 on the side membrane plate 92 on one side of the driving shaft 10 is staggered with each side scraper 95 on the side membrane plate 92 on the other side of the driving shaft 10, each lower membrane plate 93 is provided with a lower scraper group for scraping the frost and crystals on the upper end face of the butt joint heat exchange flange 8, each lower scraper group on each lower membrane plate 93 is centrally symmetrically arranged, the lower scraper group comprises a plurality of lower scrapers 96, each lower scraper 96 on the lower membrane plate 93 on one side of the driving shaft 10 is staggered with each lower scraper 96 on the lower membrane plate 93 on the other side of the driving shaft 10, each upper membrane plate 91 in each connecting kettle 2 is provided with an upper scraper group for scraping the frost and crystals on the lower end face of the butt joint heat exchange flange 8, each upper scraper group on each upper membrane plate 91 is centrally symmetrically arranged, each upper scraper 94 on the upper membrane plate 91 on one side of the driving shaft 10 is staggered with each upper scraper 94 on the upper membrane plate 91 on the other side of the driving shaft 10, each upper scraper 94, each side scraper 95 and each side scraper 95 on the side frame are arranged on the same side of the side frame.

[0045] Each side scraper 95, each upper scraper 94 and each lower scraper 96 is a fluorine scraper;

[0046] The driving shaft 10 is provided with a first wedge-shaped connecting block 101 matched with the first connecting sleeve 901, and a second wedge-shaped connecting block 102 matched with the second connecting sleeve 902, the first connecting sleeve 901 is provided with a first wedge-shaped through hole 903, the second connecting sleeve 902 is provided with a second wedge-shaped through hole 904, the first connecting sleeve 901 is connected with the driving shaft 10 through the cooperation of the first wedge-shaped through hole 903 and the first wedge-shaped connecting block 101, and is fixed on the driving shaft 10 through a locking member, the second connecting sleeve 902 is connected with the driving shaft 10 through the cooperation of the second wedge-shaped through hole 904 and the second wedge-shaped connecting block 102, and is fixed on the driving shaft 10 through a locking member, the diaphragm frame 9 is fixedly connected with the driving shaft 10 through the cooperation of the first connecting sleeve 901 and the driving shaft 10, and the cooperation of the second connecting sleeve 902 and the driving shaft 10.

[0047] Each of the first wedge-shaped connecting block 101 and the second wedge-shaped connecting block 102 is provided with external threads, and each of the first wedge-shaped connecting block 101 and the second wedge-shaped connecting block 102 is provided with a locking nut, the first connecting shaft sleeve 901 is positioned and pressed against the first wedge-shaped connecting block 101 through the insertion and connection of the first wedge-shaped through hole 903 and the first wedge-shaped connecting block 101, and is fixed on the driving shaft 10 through the cooperation of the locking nut and the external threads, and the second connecting shaft sleeve 902 is positioned and pressed against the second wedge-shaped connecting block 102 through the insertion and connection of the second wedge-shaped through hole 904 and the second wedge-shaped connecting block 102, and is fixed on the driving shaft 10 through the cooperation of the locking nut and the external threads.

[0048] Each of the upper scraper 94, each of the side scraper 95 and each of the lower scraper 96 comprises a mounting seat 905, a connecting plate body 906 rotatably connected to the mounting seat 905, and a scraper part 907 detachably mounted on the connecting plate body 906, the scraper part 907 is provided with a scraping inclined surface 9071 on the side away from the connecting plate body 906, the scraper part 907 extends from one side of the connecting plate body 906 to the other side of the connecting plate body 906, the connecting plate body 906 is provided with a connecting slot 908, the width of the slot opening of the connecting slot 908 is smaller than the width of the slot bottom, the connecting slot 908 extends from one side of the connecting plate body 906 to the other side of the connecting plate body 906, the connecting slot 908 is provided with a plug-in plate body 909 integrally formed with the scraper part 907, the plug-in plate body 909 extends from one side of the scraper part 907 to the other side of the scraper part 907, the scraper part 907 is connected with the connecting plate body 906 through the insertion and connection of the plug-in plate body 909 and the connecting slot 908, and is fixedly mounted on the rotating plate body through the locking member, each of the connecting plate bodies 906 is limited and pressed against the side frame during the rotation of the driving shaft 10, and each of the scraper parts 907 forms a line contact with the inner wall of the connecting kettle 2, the inner wall of the lower kettle body 3, and the upper end face and the lower end face of the butt joint heat exchange flange 8.

[0049] By setting the width of the slot opening of the connecting slot 908 to be smaller than the width of the slot bottom, the connecting slot 908 is formed in a wedge shape, the scraper part 907 is detachably fixedly connected through the insertion and connection of the plug-in plate body 909, during the installation of the scraper part 907, the operator can only insert the plug-in plate body 909 into the connecting slot 908 from the side, then lock the screw through the through hole on the plug-in plate body 909 and cooperate with the locking nut, so as to fix the scraper part 907, which ensures the stability and firmness of the connection between the scraper body and the connecting plate body 906, and also avoids the disconnection between the scraper part 907 and the connecting plate body 906;

[0050] The docking heat exchange flange 8 comprises a heat exchange flange part 83 and heat exchange parts 84 integrally formed with the heat exchange flange part 83 and in the shape of a funnel, each heat exchange part 84 is provided with an inner hole through which the driving shaft 10 passes, the heat exchange cavity 80 is arranged in the heat exchange part 84, and the heat exchange cavity 80 is annular, the second liquid inlet pipe 81 communicates with the heat exchange cavity 80 after passing through the heat exchange flange part 83, the second liquid outlet pipe 82 communicates with the heat exchange cavity 80 after passing through the heat exchange flange part 83, the heat exchange cavity 80 is provided with annular first and second partition plates 86 and 87, the first and second partition plates 86 and 87 are coaxially arranged with the driving shaft 10, and the diameter of the second partition plate 87 is greater than that of the first partition plate 86, the heat exchange cavity 80 is divided into first, second and third heat exchange cavities 801, 802 and 803 by the first and second partition plates 86 and 87, the first partition plate 86 is provided with a plurality of shunt holes 88 distributed on the first partition plate 86 along the circumference of the axis of the driving shaft 10, and the second partition plate 87 is also provided with a plurality of shunt holes 88 distributed on the second partition plate 87 along the circumference of the axis of the driving shaft 10, the first, second and third heat exchange cavities 801, 802 and 803 communicate through each shunt hole 88.

[0051] The heat exchange part 84 is arranged in the shape of a funnel, which can increase the overall heat exchange area on the one hand, and on the other hand, by arranging the heat exchange part 84, the crystals in the upper kettle body 1 are guided to the middle kettle body, and the crystals in the middle kettle body are guided to the lower kettle body 3, which ensures the efficiency and yield of crystallization and also ensures the continuity of cooling and crystallization in the crystallization kettle.

[0052] The second liquid inlet pipe 81 is connected with a liquid injection pipe 85, the liquid injection pipe 85 is fixed on the first and second partition plates 86 and 87, one end of the liquid injection pipe 85 communicates with the second liquid inlet pipe 81, the other end of the liquid injection pipe 85 passes through the second and first partition plates 87 and 86 and extends into the first heat exchange cavity 801 and communicates with the first heat exchange cavity 801.

[0053] The liquid injection pipe 85 is arranged on the second liquid inlet pipe 81. The first heat exchange cavity 801 is injected with condensed medium through the liquid inlet pipe. The condensed medium in the first heat exchange cavity 801 enters the second heat exchange cavity 802 and the third heat exchange cavity 803 in turn through the flow dividing hole. The condensed medium enters the first heat exchange cavity 801 first to exchange heat, and then enters the second heat exchange cavity 802 and the third heat exchange cavity 803 to exchange heat. On one hand, after the condensed medium in the first heat exchange cavity 801 exchanges heat, the condensed medium can be partially exchanged heat from the second heat exchange cavity 802 and the third heat exchange cavity 803. After the heat exchange in the first heat exchange cavity 801 is completed, the condensed medium injected from the pipe enters the second heat exchange cavity 802 from the first heat exchange cavity 801, and then enters the third heat exchange cavity 803 to exchange heat after the heat exchange in the second heat exchange cavity 802 is completed. After the heat exchange in the second heat exchange cavity 802 is completed, the condensed medium enters the third heat exchange cavity 803. On one hand, the condensed medium can fully and efficiently exchange heat with the heat exchange cavity 80, improving the heat exchange efficiency. On the other hand, the heat exchange cavity 80 is not separated and the condensed medium is not injected from the bottom. After the condensed medium enters from the second liquid inlet pipe 81, it is discharged from the second liquid outlet pipe 82 after being partially exchanged heat. The condensed medium cannot be fully utilized, so the efficiency and the utilization rate of the condensed medium can be improved by separating and injecting from the first heat exchange cavity 801.

[0054] The diaphragm frame 9 comprises a first connecting shaft sleeve 901 and a second connecting shaft sleeve 902 detachably mounted on the driving shaft 10, and side frames symmetrically arranged on both sides of the first connecting shaft sleeve 901 along the axis of the first connecting shaft sleeve 901. The first connecting shaft sleeve 901 and the second connecting shaft sleeve 902 are coaxially arranged with the driving shaft 10. The side frame comprises an upper diaphragm plate 91 integrally formed with the first connecting shaft sleeve 901, a lower diaphragm plate 93 integrally formed with the second connecting shaft sleeve 902, and a side diaphragm plate 92 for connecting the upper diaphragm plate 91 and the lower diaphragm plate 93. The upper diaphragm plate 91 of each connecting kettle 2 is provided with a positioning plate 97. The positioning plate 97 is provided with a side pressing plate 98. The side scraping groove 99 on the side pressing plate 98 is pressed against the hole wall of the inner hole of the heat exchange part 84. The side scraping groove 99 on the side pressing plate 98 scrapes off the frost and crystals on the hole wall of the inner hole of the heat exchange part 84 through the rotation of the diaphragm frame 9.

[0055] The bottom end of the heat exchange part 84 is arc-shaped, the side scraping groove 99 on the side pressing plate 98 is attached to the bottom end of the heat exchange part 84, each upper scraping plate 94 and lower scraping plate 96 can only scrape the frost and crystals on the upper end face and lower end face of the heat exchange part 84, and the bottom end of the heat exchange part 84 is a blind area of the heat exchange part 84. The side pressing plate 98 and the side scraping groove 99 are arranged, on the one hand, the crystals and frost generated at the bottom end of the heat exchange part 84 can be scraped out during the rotation of the diaphragm frame 9, and on the other hand, the side scraping plate 95 can also support the heat exchange part 84 when the diaphragm frame 9 is not rotating, thereby ensuring the stability of the heat exchange part 84.

[0056] The upper end of each connecting kettle 2 is provided with a second flange part 21, the lower end of each connecting kettle 2 is provided with a third flange part 22, the lower kettle body 3 is provided with a fourth flange part 31, the upper and lower end faces of the first flange part 13, the second flange part 21, the third flange part 22, the fourth flange part 31 and the heat exchange flange part 83 are all provided with a connecting boss, each connecting boss is coaxially arranged with the driving shaft 10, the connecting boss on the first flange part 13, the second flange part 21 and the third flange part 22 is all provided with a connecting ring groove a coaxially arranged with the connecting boss, the upper end face and the lower end face of the heat exchange flange part 83 and the fourth flange part 31 are all provided with a connecting boss b coaxially arranged with the connecting boss, the upper end of the upper kettle body 1 and the upper end of the intermediate kettle body are sealingly connected with the butt joint heat exchange flange 8 through the plug-in cooperation of the connecting boss b on the upper end face of the heat exchange flange part 83 and the connecting ring groove a on the first flange part 13, and the plug-in cooperation of the connecting boss b on the lower end face of the heat exchange flange part 83 and the connecting ring groove a on the second flange part 21 closest to the upper kettle body 1, and are fixed through a locking piece, each adjacent connecting kettle 2 is sealingly connected with the butt joint heat exchange flange 8 through the plug-in cooperation of the connecting ring groove a on the third flange part 22 and the connecting boss b on the upper end face of the heat exchange flange part 83, and the cooperation of the connecting boss b on the lower end face of the heat exchange flange part 83 and the connecting ring groove a on the second flange part 21 of the adjacent connecting kettle 2, and is fixed through a locking piece, and the lower kettle body 3 is sealingly connected with the connecting kettle 2 closest to the lower kettle body 3 through the plug-in cooperation of the connecting boss b on the fourth flange part 31 and the connecting ring groove a on the third flange part 22 of the connecting kettle 2 closest to the lower kettle body 3, and is fixedly connected through a locking piece.

[0057] In order to ensure the sealing, a sealing ring coaxially arranged with the connecting ring groove a can be arranged in each connecting ring groove a, so as to ensure the sealing of the whole after the connecting boss b is connected with the connecting ring groove a.

[0058] The upper kettle body 1 is provided with a connecting bottom plate 14, the connecting bottom plate 14 is fixedly provided with a connecting support 5, the connecting bottom plate 14 is in sealing connection with the upper kettle body 1 and the connecting support 5, the driving motor 6 is fixedly installed on the connecting support 5, the output end of the driving motor 6 is fixedly provided with a transmission shaft 52 coaxially arranged with the driving shaft 10, the connecting support 5 is fixedly provided with a bearing seat 53, the bearing seat 53 is provided with a plurality of transmission bearings 54 coaxially arranged with the transmission shaft 52, each transmission bearing 54 on the bearing seat 53 is sleeved on the transmission shaft 52, the connecting bottom plate 13 is provided with a mechanical seal 55 coaxially arranged with the transmission shaft 52, the transmission shaft 52 passes through the mechanical seal 55, the connecting bottom plate 14 and the upper kettle body 1 and is connected with the driving shaft 10, a connecting flange is arranged between the transmission shaft 52 and the driving shaft 10, and the transmission shaft 52 and the driving shaft 10 are connected through the connecting flange.

[0059] The front and rear end faces of the connecting support 5 are both provided with filter plates 51, which can be used for heat dissipation and dust prevention.

[0060] The bottom of the lower kettle body 3 is provided with a discharging kettle 4 coaxially arranged with the lower kettle body 3 and in communication, the side wall of the discharging kettle 4 is provided with a communication aeration pipe 42, the aeration pipe 42 can prevent crystallization from blocking each pipeline, thereby playing a role of dredging the pipeline, one end of the driving shaft 10 is connected with the transmission shaft 52 through the connecting flange, the other end of the driving shaft 10 is rotatably connected in the discharging kettle 4, the discharging pipe 41 is arranged on the discharging kettle 4 and in communication with the discharging kettle 4, the discharging pipe 41 is arranged at the bottom of the discharging kettle 4, the discharging kettle 4 is also provided with a diaphragm frame 9, the diaphragm frame 9 is driven to rotate in the discharging kettle 4 and stirs the feed through the driving of the driving motor 6 on the transmission shaft 52 and the connection between the transmission shaft 52 and the driving shaft 10.

[0061] The utility model discloses a working principle: the utility model in the process of using, fixed mounting is installed in the upper kettle body 1, installs drive motor 6 on the connecting support 5, and drive motor 6 is connected with drive shaft 10 through transmission shaft 52, and then according to the specific use environment and use scene, selects the connecting kettle 2 of different number, after determining the number of connecting kettle 2, first diaphragm frame 9 in the upper kettle body 1 is installed, in the process of installation, first connecting shaft sleeve 901 is connected with drive shaft 10 through the cooperation of first wedge-shaped through hole 903 and first wedge-shaped connecting block 101, and is fixed on drive shaft 10 through locking piece, and second connecting shaft sleeve 902 is connected with drive shaft 10 through the cooperation of second wedge-shaped through hole 904 and second wedge-shaped connecting block 102, and is fixed on drive shaft 10 through locking piece, through the wedge-shaped cooperation of first wedge-shaped connecting block 101 and first wedge-shaped through hole 903 and the wedge-shaped cooperation of second wedge-shaped connecting block 102 and second wedge-shaped through hole 904, the firmness that first connecting shaft sleeve 901 and second connecting shaft sleeve 902 are connected with drive shaft 10 is guaranteed, and the diameter of the upper end surface of first wedge-shaped connecting block 101 and second wedge-shaped connecting block 102 is less than the diameter of lower end surface, so in the process of using, first connecting shaft sleeve 901 and second connecting shaft sleeve 902 will be more and more downwards and be pressed between first wedge-shaped connecting block 101 and second wedge-shaped connecting block 102, and the stability of diaphragm frame 9 on drive shaft 10 is guaranteed after being fixed through locking piece, when the side scraper 95 on diaphragm frame 9 in the upper kettle body 1 is pressed on the inner wall of the upper kettle body 1, then each butt joint heat exchange flange 8 and connecting kettle 2 are installed;

[0062] In the process of installing and connecting the connecting body closest to the upper kettle body 1 with the upper kettle body 1, the lower end of the upper kettle body 1 is sealed and connected with the butt joint heat exchange flange 8 through the plug-in cooperation of the connecting convex ring b on the upper end surface of the heat exchange flange part 83 with the connecting ring groove a on the first flange part 13 and the plug-in cooperation of the connecting convex ring b on the lower end surface of the heat exchange flange part 83 with the connecting ring groove a on the second flange part 21 closest to the upper kettle body 1, and is fixed through locking piece, so as to ensure the stable, firm and sealed connection of the upper kettle body 1 and the connecting kettle 2, and then the diaphragm frame 9 in the connecting kettle 2 is installed on the drive shaft 10;

[0063] Then the butt heat exchange flange 8, connecting kettle 2 and membrane frame 9 are installed in turn, each connecting kettle 2 in the process of installation, each adjacent connecting kettle 2 is sealed and connected with the butt heat exchange flange 8 through the insertion and fitting of the connecting ring groove a on the third flange part 22 and the connecting convex ring b on the upper end surface of the heat exchange flange part 83, and the connecting convex ring b on the lower end surface of the heat exchange flange part 83 and the connecting ring groove a on the second flange part 21 on the adjacent connecting kettle 2, and is fixed by the locking member, after the installation of the connecting kettle 2 closest to the lower kettle body 3 and the membrane frame 9 is completed, the connecting kettle 2 and the lower kettle body 3 are connected in the process, the lower kettle body 3 is sealed and connected with the connecting kettle 2 closest to the lower kettle body 3 through the insertion and fitting of the connecting convex ring b on the fourth flange part 31 and the connecting ring groove a on the third flange part 22 on the connecting kettle 2 closest to the lower kettle body 3, and is fixed by the locking member;

[0064] Each side scraper 95 on the membrane frame 9 in the upper kettle body 1 is pressed against the inner wall of the upper kettle body 1, each lower scraper 96 is pressed against the upper end surface of the butt heat exchange flange 8 between the upper kettle body 1 and the connecting kettle 2, each upper scraper 94 on the membrane frame in each connecting kettle 2 is pressed against the lower end surface of the corresponding butt heat exchange flange 8, each side scraper 95 is pressed against the inner wall of each connecting kettle 2, and each lower scraper 96 is pressed against the upper end surface of the corresponding butt heat exchange flange 8, the side scraping groove 99 of the side pressing plate 98 on the upper membrane plate 91 in the connecting kettle 2 removes the frost and crystal on the hole wall in the hole of the heat exchange part 84 through the rotation of the membrane frame 9, after the installation and connection of the lowermost connecting kettle 2 in each connecting kettle 2 and the lower kettle body 3, the side scraper 95 on the membrane frame 9 in the connecting kettle 2 and the lower kettle body 3 removes the frost and crystal on the inner wall of the connecting kettle 2 and the inner wall of the lower kettle body 3 through the driving of the driving shaft 10;

[0065] After the crystallization vessel is installed, heat exchange medium is injected into each condensation chamber 70 and heat exchange chamber 80. The drive shaft 10 is driven by the drive motor 6 to rotate, which in turn drives each diaphragm frame 9 on the drive shaft 10 to rotate. Then, the medium is fed through the feed pipe 11. The medium first enters the upper vessel 1 for stirring and heat exchange. The crystals and frost on the inner wall of the upper vessel 1, as well as the crystals and frost on the upper end face of the corresponding docking heat exchange flange 8, are scraped off by each side scraper 95 and lower scraper 96 on the diaphragm frame 9, and guided to the intermediate vessel through the heat exchange part 84 on the docking heat exchange flange 8. Each upper scraper 94 on the diaphragm frame 9 in each intermediate vessel is then removed. The lower end face of the corresponding upper docking heat exchange flange 8 is scraped to remove crystals and frost. Each side scraper 95 scrapes the frost and crystals on the inner wall of the corresponding connecting vessel 2 by rotating the diaphragm frame 9. Each lower scraper 96 scrapes the crystals and frost on the upper end face of the corresponding lower docking heat exchange flange 8 by rotating the diaphragm frame 9. The inner wall of the inner hole of each docking heat exchange flange 8 is scraped by the side scraping groove 99 on the side pressure plate 98. Each side scraper 95 on the diaphragm in the lower vessel 3 is driven by the drive shaft 10 to scrape off the frost and crystals on the inner wall of the connecting vessel 2 and the lower vessel 3. Then the crystals are discharged from the discharge vessel 4.

[0066] This utility model sets the intermediate vessel body as a connection of multiple connecting vessels 2. The size of the multiple connecting vessels 2 can be adjusted according to the actual use scenario and usage requirements. At the same time, multiple docking heat exchange flanges 8 are set to ensure the continuity and efficiency of feeding and increase the overall heat exchange area. On the one hand, it can greatly improve the overall heat exchange efficiency and heat exchange speed, and on the other hand, it can also greatly improve the precipitation rate of crystals in the feed. The structure is ingenious, stable and practical.

[0067] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A membrane cascade continuous cooling crystallizer having a crystallization tank, characterized in that: The crystallization kettle comprises an upper kettle body, a lower kettle body coaxially arranged with the upper kettle body, and an intermediate kettle body arranged between the upper kettle body and the lower kettle body, the intermediate kettle body comprises at least one connecting kettle coaxially arranged with the upper kettle body, the upper kettle body is provided with a feeding pipe, the lower kettle body is provided with a discharging pipe, the upper kettle body is further provided with a driving motor, the crystallization kettle is provided with a driving shaft arranged in the crystallization kettle and capable of rotating under the driving of the driving motor, the driving shaft is coaxially arranged with the crystallization kettle, each membrane frame capable of stirring the feed is arranged in the upper kettle body, each connecting kettle and the lower kettle body, each membrane frame is installed on the driving shaft and stirs the feed along with the rotation of the driving shaft, the outer wall of the upper kettle body, each connecting kettle and the lower kettle body is provided with a jacket, the jacket on the upper kettle body, the jacket on each connecting kettle and the jacket on the lower kettle body form a condensation cavity with the outer wall of the upper kettle body, the outer wall of each connecting kettle and the outer wall of the lower kettle body, the jacket is provided with a first liquid inlet pipe capable of inputting the condensing medium into the condensation cavity and a first liquid outlet pipe capable of discharging the condensing medium in the condensation cavity, the intermediate kettle body and the upper kettle body, and each connecting kettle are provided with a butt joint heat exchange flange capable of increasing the heat exchange area and guiding the crystallization after condensation, the butt joint heat exchange flange is funnel-shaped, the butt joint heat exchange flange is provided with a heat exchange cavity capable of containing the condensing medium, the butt joint heat exchange flange is provided with a second liquid inlet pipe capable of inputting the condensing medium into the inner cavity of the butt joint heat exchange flange and a second liquid outlet pipe capable of discharging the condensing medium in the inner cavity of the butt joint heat exchange flange, the upper end of the intermediate kettle body is sealingly connected with the upper kettle body through the butt joint heat exchange flange and fixedly connected with the upper kettle body through a locking piece, each connecting kettle is also sealingly connected through the butt joint heat exchange flange and fixed through a locking piece, and the lower end of the intermediate kettle body is sealingly connected with the lower kettle body and fixed through a locking piece.

2. The sheet- cascade continuous cooling crystallizer according to claim 1, characterized in that: The diaphragm frame comprises a first connecting shaft sleeve and a second connecting shaft sleeve detachably mounted on the driving shaft, and a side frame symmetrically arranged along the axis of the first connecting shaft sleeve on both sides of the first connecting shaft sleeve, the first connecting shaft sleeve and the second connecting shaft sleeve are coaxially arranged with the driving shaft, the side frame comprises an upper membrane plate integrally formed with the first connecting shaft sleeve, a lower membrane plate integrally formed with the second connecting shaft sleeve, and a side membrane plate for connecting the upper membrane plate and the lower membrane plate, each side membrane plate is provided with a plurality of side scraper groups capable of scraping off frost or crystals on the inner wall of the upper kettle body or the inner wall of the connecting kettle or the inner wall of the lower kettle body, the side scraper groups on each side membrane plate are centrally symmetrically arranged, each side scraper group comprises a plurality of side scrapers, each side scraper on the side membrane plate on one side of the driving shaft is staggered with each side scraper on the side membrane plate on the other side of the driving shaft, each lower membrane plate is provided with a lower scraper group capable of scraping off frost and crystals on the upper end face of the butt joint heat exchange flange, each lower scraper group on each lower membrane plate is centrally symmetrically arranged, the lower scraper group comprises a plurality of lower scrapers, each lower scraper on the lower membrane plate on one side of the driving shaft is staggered with each lower scraper on the lower membrane plate on the other side of the driving shaft, each upper membrane plate in each connecting kettle is provided with an upper scraper group capable of scraping off frost and crystals on the lower end face of the butt joint heat exchange flange, each upper scraper group on each upper membrane plate is centrally symmetrically arranged, each upper scraper on the upper membrane plate on one side of the driving shaft is staggered with each upper scraper on the upper membrane plate on the other side of the driving shaft, each upper scraper, each side scraper, and each side scraper on the side frame are arranged on the same side of the side frame.

3. The sheet- cascade continuous cooling crystallizer according to claim 2, characterized in that: The driving shaft is provided with a first wedge-shaped connecting block matched with the first connecting shaft sleeve and a second wedge-shaped connecting block matched with the second connecting shaft sleeve, the first connecting shaft sleeve is provided with a first wedge-shaped through hole, the second connecting shaft sleeve is provided with a second wedge-shaped through hole, the first connecting shaft sleeve is connected with the driving shaft through the cooperation of the first wedge-shaped through hole and the first wedge-shaped connecting block, and is fixed on the driving shaft through a locking piece, the second connecting shaft sleeve is connected with the driving shaft through the cooperation of the second wedge-shaped through hole and the second wedge-shaped connecting block, and is fixed on the driving shaft through a locking piece, the diaphragm frame is fixedly connected with the driving shaft through the cooperation of the first connecting shaft sleeve and the driving shaft and the cooperation of the second connecting shaft sleeve and the driving shaft.

4. The sheet- cascade continuous cooling crystallizer of claim 3, wherein: Each upper scraper, each side scraper and each lower scraper comprises a mounting seat, a connecting plate body rotatably connected to the mounting seat, and a scraper part detachably mounted on the connecting plate body, a scraping slope is arranged on a side of the scraper part away from the connecting plate body, the scraper part extends from one side of the connecting plate body to the other side of the connecting plate body, a connecting slot is arranged on the connecting plate body, the width of the slot opening of the connecting slot is smaller than the width of the slot bottom, the connecting slot extends from one side of the connecting plate body to the other side of the connecting plate body, an insertion plate body is integrally formed on the scraper part, the insertion plate body extends from one side of the scraper part to the other side of the scraper part, the scraper part is connected to the connecting plate body through the cooperation of the insertion plate body and the connecting slot, and is fixedly mounted on the rotating plate body through a locking part, each connecting plate body is limited to abut against the side frame during the rotation of the drive shaft, and each scraper part forms linear contact with the inner wall of the connecting kettle, the inner wall of the lower kettle body, and the upper end face and the lower end face of the butt joint heat exchange flange.

5. The sheet- cascade continuous cooling crystallizer of claim 1, wherein: The butt joint heat exchange flange comprises a heat exchange flange part and a heat exchange part which is integrally formed with the heat exchange flange part and is funnel-shaped, each heat exchange part is provided with an inner hole through which the drive shaft passes, the heat exchange cavity is arranged in the heat exchange part, and the heat exchange cavity is annular, the second liquid inlet pipe communicates with the heat exchange cavity after passing through the heat exchange flange part, the second liquid outlet pipe communicates with the heat exchange cavity after passing through the heat exchange flange part, the heat exchange cavity is provided with annular first and second partition plates, the first and second partition plates are coaxially arranged with the drive shaft, and the diameter of the second partition plate is greater than that of the first partition plate, the heat exchange cavity is divided into first, second and third heat exchange cavities by the first and second partition plates, the first partition plate is provided with a plurality of shunt holes which are circumferentially distributed on the first partition plate along the axis of the drive shaft, and the second partition plate is also provided with a plurality of shunt holes which are circumferentially distributed on the second partition plate along the axis of the drive shaft, and the first, second and third heat exchange cavities communicate through the shunt holes.

6. The sheet- cascade continuous cooling crystallizer of claim 5, wherein: The second liquid inlet pipe is connected with a liquid injection pipe, the liquid injection pipe is fixed on the first and second partition plates, one end of the liquid injection pipe communicates with the second liquid inlet pipe, and the other end of the liquid injection pipe extends into the first heat exchange cavity after passing through the second and first partition plates and communicates with the first heat exchange cavity.

7. The sheet- cascade continuous cooling crystallizer of claim 6, wherein: The diaphragm frame comprises first and second connecting shaft sleeves which are detachably mounted on the drive shaft, and side frames which are symmetrically arranged on both sides of the first connecting shaft sleeve along the axis of the first connecting shaft sleeve, the first and second connecting shaft sleeves are coaxially arranged with the drive shaft, and the side frame comprises an upper diaphragm plate which is integrally formed with the first connecting shaft sleeve, a lower diaphragm plate which is integrally formed with the second connecting shaft sleeve, and a side diaphragm plate for connecting the upper and lower diaphragm plates, each upper diaphragm plate of each connecting kettle is provided with a positioning plate, the positioning plate is provided with a side pressing plate, and a side scraping groove is arranged on the side pressing plate, the side scraping groove of the side pressing plate abuts against the hole wall of the inner hole of the heat exchange part, and the side scraping groove on the side pressing plate scrapes off the frost and crystals on the hole wall of the inner hole of the heat exchange part through the rotation of the diaphragm frame.

8. The sheet- cascade continuous cooling crystallizer of claim 7, wherein: The upper kettle body is provided with a first flange part, the upper end of each connecting kettle is provided with a second flange part, the lower end of each connecting kettle is provided with a third flange part, the lower kettle body is provided with a fourth flange part, the upper and lower end faces of the first flange part, the second flange part, the third flange part, the fourth flange part and the heat exchange flange part are all provided with connecting bosses, each connecting boss is coaxially arranged with the driving shaft, the connecting bosses on the first flange part, the second flange part and the third flange part are all provided with connecting ring grooves coaxially arranged with the connecting bosses, the upper end face and the lower end face of the heat exchange flange part and the fourth flange part are all provided with connecting bosses coaxially arranged with the connecting bosses, the upper end of the upper kettle body and the intermediate kettle body are sealingly connected with the butt joint heat exchange flange through the plug-in cooperation of the connecting bosses on the upper end face of the heat exchange flange part and the connecting ring grooves on the first flange part and the plug-in cooperation of the connecting bosses on the lower end face of the heat exchange flange part and the connecting ring grooves on the second flange part closest to the upper kettle body, and are fixed through locking members, each adjacent connecting kettle is sealingly connected with the butt joint heat exchange flange through the plug-in cooperation of the connecting ring grooves on the third flange part and the connecting bosses on the upper end face of the heat exchange flange part and the cooperation of the connecting bosses on the lower end face of the heat exchange flange part and the connecting ring grooves on the second flange part on the adjacent connecting kettle, and is fixed through locking members, and the lower kettle body is sealingly connected with the connecting kettle closest to the lower kettle body through the plug-in cooperation of the connecting bosses on the fourth flange part and the connecting ring grooves on the third flange part on the connecting kettle closest to the lower kettle body, and is fixedly connected through locking members.

9. The sheet- cascade continuous cooling crystallizer of claim 2, wherein: The upper kettle body is provided with a connecting bottom plate, the connecting bottom plate is fixedly provided with a connecting support, the driving motor is fixedly installed on the connecting support, the output end of the driving motor is fixedly provided with a transmission shaft coaxially arranged with the driving shaft, the connecting support is fixedly provided with a bearing seat, the bearing seat is provided with a plurality of transmission bearings coaxially arranged with the transmission shaft, each transmission bearing on the bearing seat is sleeved on the transmission shaft, the connecting bottom plate is provided with a mechanical seal coaxially arranged with the transmission shaft, the transmission shaft is connected with the driving shaft after penetrating through the mechanical seal, the connecting bottom plate and the upper kettle body, a connecting flange is arranged between the transmission shaft and the driving shaft, and the transmission shaft and the driving shaft are connected through the connecting flange.

10. The sheet- cascade continuous cooling crystallizer of claim 9, wherein: The bottom of the lower kettle body is provided with a discharging kettle coaxially arranged with the lower kettle body and in communication, the side wall of the discharging kettle is provided with an aeration pipe in communication, one end of the driving shaft is connected with the transmission shaft through the connecting flange, the other end of the driving shaft is rotationally connected in the discharging kettle, the discharging pipe is arranged on the discharging kettle and in communication with the discharging kettle, the discharging pipe is arranged at the bottom of the discharging kettle, the discharging kettle is also provided with a diaphragm frame, the diaphragm frame is rotated in the discharging kettle through the driving of the driving motor on the transmission shaft and the connection between the transmission shaft and the driving shaft and stirs the feed.

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