A filter and salt removing device for POY oil agent monomer

Abstract

The application provides a POY oil agent monomer special filtering and desalting device, and relates to the technical field of spinning oil agent. The POY oil agent monomer special filtering and desalting device comprises a candle filter, a plurality of desalting assemblies are uniformly communicated with one end of a collecting pipe, a filter cloth is sleeved on the filter core, a compression ring is arranged at the top end of the filter cloth, and the compression ring is elastically sleeved on the filter core; a motor is arranged on the top cover, a first shaft is drivingly connected to the output end of the motor, a top support is threadedly connected to one end of the first shaft, and the top support and the compression ring are rotationally fixed. The heating equipment is combined with the vacuumizing equipment to perform temperature rising and pressure reducing operation on the filter cylinder, so that the raw liquid is filtered and desalted under high temperature and low pressure, the conductivity of the polyether monomer is reduced, the motor drives the first shaft to make the filter cloth perform extrusion and distortion actions, the filter cake is partially detached in the deformation process, the service life of the filter cloth is prolonged, and the use effect of the filter cloth is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spinning oil, in particular to a filter and salt removal device special for POY oil agent monomer. BACKGROUND

[0002] The monomer components of the existing pre-spinning oil are generally polyether and aliphatic polyoxyethylene ether products catalyzed by alkali metals. The transparency and electrical conductivity of the product produced by ethoxylation reaction are close to the ideal index, but the pre-spinning oil prepared by directly compounding the product produced by the previous ethoxylation reaction contains many monomer by-products and a large amount of salt. After the pre-spinning oil is used on the yarn, the hot box period is shortened during the drawing process, the hot box is seriously coked, and the polyether monomer not subjected to the salt removal and adsorption step has uneven molecular distribution and is easily settled at the bottom of the packaging barrel due to gravity. After transportation, the product is prone to turbidity. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a filter and salt removal device special for POY oil agent monomer, which comprises a candle filter, the candle filter comprises a filter cylinder, a plurality of liquid collecting pipes are uniformly arranged in the filter cylinder, one end of the liquid collecting pipe extending to the outside of the filter cylinder is communicated and is provided as a filtrate outlet, a top cover is arranged at the top end of the filter cylinder, a raw liquid inlet and a raw liquid outlet are respectively communicated with the side wall bottom of the filter cylinder, a filter cake outlet is communicated with the bottom end of the filter cylinder, a pressure sensor is arranged on the top cover to monitor the pressure value change in the filter cylinder, and the filter and salt removal device further comprises:

[0004] The filter cylinder is provided with a heating device to heat the raw liquid in the filter cylinder, and the filter cylinder is provided with a vacuum pumping device to reduce the pressure value in the filter cylinder;

[0005] One end of the liquid collecting pipe in the filter cylinder is uniformly communicated with a plurality of salt removal assemblies, the salt removal assembly comprises a filter element communicated with the liquid collecting pipe, a filter cloth is sleeved on the filter element, a pressing ring is arranged at the top end of the filter cloth, and the pressing ring is elastically sleeved on the filter element;

[0006] A motor is arranged on the top cover, the output end of the motor extends into the filter cylinder and is transmissionally connected with a first shaft, a top bracket is threadedly connected with the end of the first shaft away from the motor, and the top bracket and the pressing ring are rotationally fixed.

[0007] In addition, the filter and salt removal device special for POY oil agent monomer according to the embodiment of the present application also has the following additional technical features:

[0008] In some embodiments of the application, the filter element comprises a center tube arranged centrally and a filter tube arranged circumferentially around the center tube, the top end of the filter tube is closed, and a plurality of filter holes are uniformly arranged on the side wall of the filter tube.

[0009] In some embodiments of the application, the top end of the filter tube is sealingly connected with a drainage end, the drainage end is sealingly inserted with the center tube, and the top end of the drainage end is fixedly communicated with the collecting tube.

[0010] In some embodiments of the application, the upper end surface of the drainage end is provided with a radially protruding outer eave, and the outer eave is slidingly sleeved with the compression ring.

[0011] In some embodiments of the application, the bottom end of the center tube is sealingly connected with a collection cabin, and the filter tube and the collection cabin are sealingly communicated.

[0012] In some embodiments of the application, the lower end surface of the compression ring is abutted with an elastic member, the elastic member is sleeved with the filter tube, and the end of the elastic member away from the drainage end is abutted with the upper end surface of the collection cabin.

[0013] In some embodiments of the application, the two ends of the filter cloth are respectively detachably fixedly connected with the compression ring and the collection cabin.

[0014] In some embodiments of the application, a helical rod is fixedly connected between the drainage end and the collection cabin, the helical rod is circumferentially arranged around the center tube, and the helical rod is located between the elastic member and the filter tube.

[0015] In some embodiments of the application, the helical rod is slidingly inserted with the compression ring.

[0016] In some embodiments of the application, the first shaft is provided with an upper thread on the end side wall close to the top support, the position where the top support and the compression ring are connected is slidingly sleeved with the drainage end, and the top support and the inner wall of the filter cartridge body are slidingly matched.

[0017] In some embodiments of the application, the internal cavity of the collection cabin is conically arranged, the bottom end of the collection cabin is communicated with a blocking member, the end of the blocking member away from the filter element is connected with a cleaning assembly, the cleaning assembly comprises a connecting cabin sealingly slidingly inserted with the blocking member, a bottom support fixedly connected with the connecting cabin, and a second shaft drivingly matched with the bottom support.

[0018] In some embodiments of the present application, the sealing member comprises a connecting pipe fixedly connected with the collecting cabin, a connecting rod is fixedly connected with one end of the connecting pipe away from the collecting cabin, and a plug is fixedly connected with one end of the connecting rod away from the connecting pipe.

[0019] In some embodiments of the present application, the connecting cabin and the collecting cabin are sealingly and fittingly connected, wherein the connecting cabin is conically arranged, and a through hole is arranged at the bottom end of the conically arranged connecting cabin and sealingly and slidingly fitted with the plug.

[0020] In some embodiments of the present application, the second shaft and the first shaft are fixedly connected with one end away from the motor, and a lower thread is arranged on the sidewall of one end of the second shaft close to the first shaft, and the lower thread and the upper thread are only opposite in thread direction.

[0021] In some embodiments of the present application, the bottom support is screw-fitted between the bottom support and the upper thread on the second shaft, and the bottom support and the inner wall of the filter cylinder are limitingly and slidingly fitted.

[0022] In some embodiments of the present application, an auxiliary assembly is arranged in the filter cylinder, and the auxiliary assembly comprises an upper paddle drivingly connected with the first shaft and a lower paddle drivingly connected with the second shaft.

[0023] In some embodiments of the present application, the blades of the upper paddle and the lower paddle are symmetrically and obliquely arranged.

[0024] In some embodiments of the present application, the upper paddle is fixedly connected with the non-threaded end of the first shaft, and the lower paddle is fixedly connected with the non-threaded end of the second shaft.

[0025] According to the filter and desalination device for POY oil agent monomer, the beneficial effects are as follows:

[0026] 1. The heating device is used to heat the raw liquid in the filter cylinder, and the external vacuumizing device is used to reduce the pressure in the filter cylinder, so that the raw liquid in the filter cylinder is filtered by the filter core under high temperature and low pressure, the salt in the polyether monomer is removed as much as possible, the polyether monomer after filtration contains less salt, and the conductivity of the polyether monomer is reduced.

[0027] 2. The first shaft is driven to rotate by the motor, and under the limiting action of the filter element and the liquid collecting pipe, the top support will be axially displaced on the first shaft, and then the pressure ring will be axially displaced on the filter element, so that the pressure ring and the filter cloth on the filter element will be extruded and twisted, which can make the filter cake formed on the filter cloth fall off to a certain extent during the deformation of the filter cloth, prolong the service life of the filter cloth, enhance the use effect of the filter cloth, and accelerate the removal of the filter cake when the filter element is cleaned (forward washing or backwashing);

[0028] 3. The guide effect of the screw rod makes the pressure ring axially displace on the filter element while rotating, thereby enhancing the efficiency of removing the filter cake on the filter cloth.

[0029] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the description or be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 is a schematic diagram of the overall structure of a filter and salt removal device specially used for POY oil agent monomers according to an embodiment of the application;

[0032] Figure 2 is a schematic diagram of the internal structure of a filter and salt removal device specially used for POY oil agent monomers according to an embodiment of the application;

[0033] Figure 3 is a schematic diagram of the internal structure of a filter and salt removal device specially used for POY oil agent monomers according to an embodiment of the application;

[0034] Figure 4 is a schematic diagram of the connection relationship between the liquid collecting pipe and the filter element according to an embodiment of the application;

[0035] Figure 5 is a schematic diagram of the local structure of the salt removal assembly according to an embodiment of the application;

[0036] Figure 6 is a schematic diagram of the local structure of the salt removal assembly according to an embodiment of the application;

[0037] Figure 7 is a schematic diagram of the connection relationship between the top support and the first shaft according to an embodiment of the application;

[0038] Figure 8 is a partial structure schematic diagram of a cleaning assembly according to an embodiment of the application;

[0039] Figure 9 is a partial connection relationship schematic diagram of a cleaning assembly and a desalination assembly according to an embodiment of the application;

[0040] Figure 10 is a connection relationship schematic diagram between a connecting cabin and a plugging member and a filter core according to an embodiment of the application.

[0041] Figure: 1, filter cylinder; 11, liquid collecting pipe; 12, top cover; 13, filter cake outlet; 2, desalination assembly; 21, filter core; 211, center pipe; 212, filter pipe; 213, liquid discharge end; 214, collection cabin; 22, filter cloth; 23, pressure ring; 231, screw rod; 24, elastic member; 25, top support; 26, first shaft; 27, motor; 28, plugging member; 281, connecting pipe; 282, connecting rod; 283, plug; 3, cleaning assembly; 31, connecting cabin; 32, bottom support; 33, second shaft; 4, auxiliary assembly; 41, upper paddle; 42, lower paddle. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the application will be described below with reference to the drawings in the embodiments of the application.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.

[0044] As shown in Figures 1-10 A POY oil agent monomer dedicated filter desalination device according to an embodiment of the application includes a candle filter, and the candle filter includes a filter cylinder 1, a plurality of liquid collecting pipes 11 are uniformly arranged in the filter cylinder 1, one end of the liquid collecting pipe 11 extending to the outside of the filter cylinder 1 is communicated and set as a filtrate outlet, a top cover 12 is arranged at the top end of the filter cylinder 1, a raw liquid inlet and a raw liquid outlet are respectively communicated with the sidewall bottom of the filter cylinder 1, a filter cake outlet 13 is communicated with the bottom end of the filter cylinder 1, and a pressure sensor is arranged on the top cover 12 to monitor the pressure value change in the filter cylinder 1.

[0045] Specifically, the POY oil agent monomer dedicated filter desalination device according to an embodiment of the application further includes:

[0046] The filter cylinder 1 is provided with a heating device for heating the raw solution in the filter cylinder 1, and the filter cylinder 1 is connected with a vacuum pumping device for reducing the pressure in the filter cylinder 1. It should be noted that the heating device and the vacuum pumping device are prior art, and in the embodiment of the present application, they are only used as a heating source and a pressure reduction source. The specific heating device and vacuum pumping device are controlled by a control end to start and stop. The specific control end can be a microcomputer or other automation technology in the prior art.

[0047] As shown in Figures 2-6 The liquid collecting pipe 11 is uniformly connected with a plurality of desalination assemblies 2 at one end in the filter cylinder 1. The desalination assembly 2 comprises a filter core 21 connected with the liquid collecting pipe 11. The filter core 21 is sleeved with a filter cloth 22. The top end of the filter cloth 22 is provided with a compression ring 23. The compression ring 23 is elastically sleeved on the filter core 21.

[0048] The top cover 12 is provided with a motor 27. The output end of the motor 27 extends into the filter cylinder 1 and is drivingly connected with a first shaft 26. The end of the first shaft 26 away from the motor 27 is threadedly connected with a top bracket 25. The top bracket 25 and the compression ring 23 are rotationally fixed.

[0049] It should be noted that the top bracket 25 and the first shaft 26 are threadedly connected at a position without the filter core 21.

[0050] Therefore, the motor 27 drives the first shaft 26 to rotate. Under the limitation of the liquid collecting pipe 11 and the filter core 21, the top bracket 25 will axially displace on the threaded segment of the first shaft 26. Then, the compression ring 23 will axially displace on the filter core 21. Further, the filter cloth 22 will be extruded under the axial displacement of the compression ring 23. Therefore, the filter cake formed on the filter cloth 22 during use will fall off during the deformation of the filter cloth 22, thereby prolonging the service life and improving the filtering effect of the filter cloth 22.

[0051] In addition, the POY oil agent monomer dedicated filter and desalination device according to the embodiment of the present application also has the following additional technical features:

[0052] As shown in Figure 5 and Figure 6 The filter core 21 comprises a center pipe 211 arranged in the center and a filter pipe 212 arranged circumferentially on the side of the center pipe 211. The top end of the filter pipe 212 is closed to prevent filtered liquid from entering and exiting from the top end of the filter pipe 212. A plurality of filter holes are uniformly arranged on the side wall of the filter pipe 212 to increase the filtering area of the filter pipe 212.

[0053] It should be noted that diatomite, adsorbent and other substances can be added to the filter pipe 212 to further improve the filtering capacity of the filter pipe 212.

[0054] Further, the filter tube 212 is sealingly connected with a liquid discharge end 213, the liquid discharge end 213 is sealingly inserted into the center tube 211, and the top end of the liquid discharge end 213 is fixedly communicated with the liquid collecting tube 11.

[0055] Further, the bottom end of the center tube 211 is sealingly connected with a collection cabin 214, and the filter tube 212 is sealingly communicated with the collection cabin 214.

[0056] Therefore, it can be understood that the filter tube 212 and the center tube 211 are fixedly connected with the liquid discharge end 213 and the collection cabin 214 respectively, and the raw liquid can only enter from the side wall of the filter tube 212, then flow to the collection cabin 214, then enter the center tube 211 from the collection cabin 214, and finally enter the liquid collecting tube 11 from the liquid discharge end 213.

[0057] The upper end surface of the liquid discharge end 213 is provided with a radially protruding outer eave, the outer eave is slidingly sleeved with a compression ring 23 at the bottom side, and the outer eave limits the compression ring 23 to avoid the compression ring 23 from sliding off the liquid discharge end 213.

[0058] Further, the lower end surface of the compression ring 23 is abutted with an elastic member 24, the elastic member 24 is sleeved on the filter tube 212, and the end of the elastic member 24 away from the liquid discharge end 213 is abutted with the upper end surface of the collection cabin 214.

[0059] It should be noted that the elastic member 24 is a spring with rust-proof design.

[0060] Therefore, when the compression ring 23 is axially displaced on the filter element 21 due to the driving of the top bracket 25, the elastic member 24 will be extruded.

[0061] It should be noted that in the embodiment of the application, when the compression ring 23 is located at the top end of the liquid discharge end 213, the filter cloth 22 is in a relaxed state at this time, so that the filter cloth 22 is forced to move towards the filter tube 212 during the process that the raw liquid enters the filter element 21 from the inside of the filter cylinder 1, and the existence of the elastic member 24 causes the filter cloth 22 to form spiral indentations when it moves towards the filter tube 212. It can be understood that during use, as the filtering time increases, a filter cake with a certain thickness gradually forms on the filter cloth 22, and the filter cake causes the filter cloth 22 to be in a set state on the elastic member 24, so that when the compression ring 23 extrudes the elastic member 24, the elastic member 24 will extrude the filter cloth 22 during the contraction process, further promoting the filter cake on the filter cloth 22 to fall off.

[0062] It should be noted that the two ends of the filter cloth 22 are detachably fixed with the compression ring 23 and the collection cabin 214, which is convenient for replacement.

[0063] Further, the drain end 213 and the collection cabin 214 are fixed with the screw rod 231, the screw rod 231 is arranged in a circumferential array with the central tube 211 as the axis, and the screw rod 231 is located between the elastic member 24 and the filter tube 212.

[0064] The screw rod 231 is slidingly inserted into the compression ring 23.

[0065] Therefore, when the compression ring 23 is axially displaced on the filter core 21, the compression ring 23 will be guided by the screw rod 231 to rotate while being axially displaced, so that the filter cloth 22 is twisted while being squeezed.

[0066] It should be noted that the first shaft 26 is provided with an upper thread on the side wall of the end close to the top support 25, the position where the top support 25 and the compression ring 23 are connected is slidingly sleeved on the drain end 213, and the top support 25 and the inner wall of the filter cylinder 1 are slidingly fitted.

[0067] The use process of the POY oil agent monomer dedicated filter and desalination device according to the embodiment of the application will be described below with reference to the accompanying drawings:

[0068] The raw liquid (product produced after the front spinning oil agent is subjected to ethoxylation reaction) is injected into the filter cylinder 1, the heating device and vacuumizing device are started, and the pressure value in the filter cylinder 1 and the temperature of the raw liquid reach the predetermined standard. The liquid flow direction and the connection relationship between the filter cylinder 1 and the filter are not described in the embodiments of the present application, because the candle filter is a prior art. Specifically, after the raw liquid enters the filter cylinder 1, it penetrates into the filter tube 212 through the filter cloth 22, and then enters the collection cabin 214 from the bottom end of the filter tube 212, and finally enters the liquid discharge end 213 from the top end of the center tube 211 and is discharged from the liquid collecting pipe 11. During this process, the impurities and salts in the raw liquid will form a filter cake on the surface of the filter cloth 22, and the filter cloth 22 will form an extrusion shape towards the filter tube 212 on the elastic member 24. After a period of use, the thickness of the filter cake will gradually increase, which will reduce the permeation effect of the filter cloth 22 and the filtration efficiency of the raw liquid. The motor 27 is started to drive the first shaft 26 to drive the top bracket 25 to axially displace, and then the pressure ring 23 is driven by the top bracket 25 to axially displace on the filter core 21 and rotate along the spiral rod 231. Thus, the filter cake on the filter cloth 22 is crushed and falls by the extrusion and twisting of the filter cloth 22 by the pressure ring 23 and the elastic member 24, and converges to the filter cake outlet 13 at the bottom end of the filter cylinder 1. During this process, the raw liquid can continue to be filtered. In this way, the service life of the filter cloth 22 is increased, and the filtration effect of the filter cloth 22 is enhanced, which can increase the service life of the entire candle filter and reduce the number of times of stopping filtration for backwashing operation due to the continuous increase in the thickness of the filter cake on the filter cloth 22.

[0069] In the related art, in addition to the filter cloth 22 filtering the impurities and salts in the raw liquid, the filler in the filter tube 212 also performs secondary filtration on the raw liquid that has been preliminarily filtered by the filter cloth 22. Part of the filter residue will be deposited into the collection cabin 214 under the action of gravity. If the collection cabin 214 stores a large amount of filter residue, the filter residue needs to be discharged before the filtration can continue. In the prior art, backwashing and backflushing techniques are often used to remove the filter cake on the filter cloth 22. However, during this process, the filter residue will move in the opposite direction of the flow direction of the raw liquid, enter from the bottom end of the filter tube 212, and return to the inside of the filter cylinder 1 after passing through the filter cloth 22 from the side wall. The reverse movement of the filter residue will cause a certain degree of blockage of the filler in the filter tube 212 and the filter cloth 22, which will reduce the backwashing and backflushing effect.

[0070] According to some embodiments of the present application, as Figures 6-10As shown, the inner cavity of the collecting cabin 214 is conically arranged, facilitating the filter residue to deposit to the inner bottom of the collecting cabin 214. The bottom end of the collecting cabin 214 is communicated with a blocking piece 28. The end of the blocking piece 28 away from the filter core 21 is connected with a cleaning assembly 3. The cleaning assembly 3 comprises a connecting cabin 31 sealingly and slidingly connected with the blocking piece 28, a bottom support 32 fixedly connected with the connecting cabin 31, and a second shaft 33 in driving cooperation with the bottom support 32.

[0071] As shown, Figure 6 As shown, the blocking piece 28 comprises a connecting pipe 281 fixedly and communicated with the collecting cabin 214. The end of the connecting pipe 281 away from the collecting cabin 214 is fixedly connected with a connecting rod 282. The end of the connecting rod 282 away from the connecting pipe 281 is fixedly connected with a plug 283.

[0072] Further, the connecting cabin 31 is sealingly and slidingly connected with the collecting cabin 214. The connecting cabin 31 is conically arranged, facilitating the filter residue to gather at the inner bottom of the connecting cabin 31. The bottom end of the conically arranged connecting cabin 31 is provided with a through hole sealingly and slidingly connected with the plug 283.

[0073] Therefore, it can be understood that when the bottom end of the connecting cabin 31 is sealingly and slidingly connected with the plug 283, the connecting cabin 31 is in a closed state. When the bottom end of the connecting cabin 31 is separated from the plug 283, the connecting cabin 31 is in an open state.

[0074] It should be noted that the second shaft 33 is fixedly connected with the end of the first shaft 26 away from the motor 27. The end of the second shaft 33 close to the first shaft 26 is provided with a lower thread. The lower thread and the upper thread are only opposite in thread direction.

[0075] The bottom support 32 is threadedly connected with the upper thread on the second shaft 33. The bottom support 32 is limitingly and slidingly connected with the inner wall of the filter cylinder 1.

[0076] It should be noted that the bottom support 32 can only axially slide with the inner wall of the filter cylinder 1. The bottom support 32 cannot rotate in the filter cylinder 1.

[0077] Thus, when the motor 27 drives the first shaft 26 to rotate, the second shaft 33 is synchronously driven to rotate, and then the bottom support 32 is driven to displace along the axial direction of the second shaft 33. When the bottom support 32 displaces towards the inner bottom of the filter cylinder 1, the filter residue gathered at the bottom of the connecting cabin 31 will be discharged from the through hole at the bottom of the connecting cabin 31. Specifically, when the scheme is used, the supply of the raw liquid at the raw liquid inlet needs to be stopped, that is, the filtration needs to be stopped, so as to avoid that the raw liquid entering the inside of the filter cylinder 1 directly flows into the central pipe 211 from the through hole at the bottom of the connecting cabin 31. When the motor 27 drives the first shaft 26 to reversely rotate, the bottom support 32 is reversely displaced through the second shaft 33, and then the connecting cabin 31 and the plug 283 re-form the sealed plugging effect, so that the raw liquid can normally flow into the central pipe 211 after being filtered.

[0078] In the related art, when the filter cake on the filter cloth 22 is removed to a certain extent during the filtering process, the filter cake will be broken and fall under the action of the extrusion and twisting of the filter cloth 22, but part of the filter cake will still be adhered to the filter cloth 22, forming a state of partial falling and non-falling. The part of the filter cake that falls and does not completely adhere to the filter cloth 22 will affect the filtering effect and the service life of the filter cloth 22 (when the filter cloth 22 is extruded and twisted next time, the filter cloth 22 can be scratched).

[0079] According to some embodiments of the present application, as shown in Figure 3 The filter cylinder 1 is provided with an auxiliary assembly 4, which includes an upper paddle 41 connected to the first shaft 26 in a transmission manner and a lower paddle 42 connected to the second shaft 33 in a transmission manner.

[0080] The blades of the upper paddle 41 and the lower paddle 42 are symmetrically and obliquely arranged. Thus, when the upper paddle 41 and the lower paddle 42 rotate, the raw liquid at the bottom end will surge upwards in the stirring process, and the raw liquid at the upper end will surge downwards in the stirring process. In this way, the raw liquid in the filter cylinder 1 can not form a vortex, and can form a turbulent flow in the filter cylinder 1, so that the residual filter cake on the filter cloth 22 is impacted to fall as much as possible.

[0081] Specifically, the upper paddle 41 is fixed to the non-threaded end of the first shaft 26, and the lower paddle 42 is fixed to the non-threaded end of the second shaft 33.

[0082] Thus, in specific use, when the motor 27 removes the filter cake on the filter cloth 22, the first shaft 26 and the second shaft 33 will synchronously drive the upper paddle 41 and the lower paddle 42 fixedly connected thereon to rotate synchronously, and then agitate the top and bottom of the inside of the filter cylinder 1, so that the raw liquid forms a chaotic flow in the entire filter cylinder 1, and then impacts the residual filter cake on the filter cloth 22, cooperates with the extrusion and distortion of the filter cloth 22 by the compression ring 23 and the elastic member 24, so that the filter cake on the filter cloth 22 can be removed as much as possible, and the existence of residual filter cake is reduced.

[0083] It should be noted that the specific model and specifications of the center pipe 211, the filter pipe 212, the filter cloth 22, the elastic member 24 and the motor 27 need to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0084] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A filtration and desalination device specifically for POY oil monomers, comprising a candle filter, wherein the candle filter comprises a filter cylinder (1), wherein a plurality of liquid collecting pipes (11) are uniformly arranged inside the filter cylinder (1), wherein one end of each liquid collecting pipe (11) extends to the outside of the filter cylinder (1) and is connected to the filtrate outlet, wherein a top cover (12) is provided at the top of the filter cylinder (1), wherein a raw liquid inlet and a raw liquid outlet are respectively connected to the bottom of the side wall of the filter cylinder (1), wherein a filter cake outlet (13) is connected to the bottom of the filter cylinder (1), and a pressure sensor is provided on the top cover (12) for monitoring the pressure change inside the filter cylinder (1), characterized in that: The filter cylinder (1) has a built-in heating device to heat the raw liquid inside the filter cylinder (1), and the filter cylinder (1) is connected to a vacuum device to reduce the pressure inside the filter cylinder (1). The liquid collection pipe (11) is located inside the filter cylinder (1) and is uniformly connected to a plurality of desalination components (2). The desalination component (2) includes a filter element (21) connected to the liquid collection pipe (11). A filter cloth (22) is sleeved on the filter element (21). A pressure ring (23) is provided at the top of the filter cloth (22). The pressure ring (23) is elastically sleeved on the filter element (21). A motor (27) is provided on the top cover (12). The output end of the motor (27) extends into the filter cylinder (1) and is connected to a first shaft (26). The end of the first shaft (26) away from the motor (27) is threaded with a top bracket (25). The top bracket (25) and the pressure ring (23) are rotatably fixed together. The filter element (21) includes a centrally located central tube (211) and filter tubes (212) arranged circumferentially around the central tube (211). The top end of the filter tubes (212) is closed, and multiple filter holes are evenly arranged on the sidewalls of the filter tubes (212). A drain end (213) is sealed to the top end of the filter tubes (212), and the drain end (213) is sealed and inserted into the central tube (211). The top end of the drain end (213) is fixedly connected to the collection tube (11). The bottom end of the tube (211) is sealed to a collection chamber (214), and the filter tube (212) and the collection chamber (214) are sealed and connected; the lower end face of the pressure ring (23) abuts against an elastic element (24), the elastic element (24) is sleeved on the filter tube (212), and the end of the elastic element (24) away from the drain end (213) abuts against the upper end face of the collection chamber (214); both ends of the filter cloth (22) are detachably fixed to the pressure ring (23) and the collection chamber (214) respectively; A spiral rod (231) is fixed between the drain end (213) and the collection chamber (214). The spiral rod (231) is arranged in a circumferential array with the central tube (211) as the axis. The spiral rod (231) is located between the elastic element (24) and the filter tube (212). The spiral rod (231) is slidably inserted into the pressure ring (23).

2. The filtration and desalination device for POY oil monomers as described in claim 1, characterized in that: The upper end face of the drain end (213) is provided with a radially protruding outer edge, and the pressure ring (23) is slidably sleeved on the bottom side of the outer edge.

3. The filtration and desalination device for POY oil monomers as described in claim 1, characterized in that: The first shaft (26) has an upper thread on one side wall near the top bracket (25). The top bracket (25) and the pressure ring (23) are slidably sleeved on the drain end (213). The top bracket (25) and the inner wall of the filter cylinder (1) are slidably engaged.

Images