CN112076495A - A anti-blocking crystallization device for lactide purification - Google Patents
A anti-blocking crystallization device for lactide purification Download PDFInfo
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- CN112076495A CN112076495A CN202011005146.7A CN202011005146A CN112076495A CN 112076495 A CN112076495 A CN 112076495A CN 202011005146 A CN202011005146 A CN 202011005146A CN 112076495 A CN112076495 A CN 112076495A
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- connecting rod
- rotating
- blocking
- crystallizer
- scraper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/68—Large containers characterised by means facilitating filling or emptying preventing bridge formation using rotating devices
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
- C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention discloses an anti-blocking crystallization device for lactide purification, which comprises a crystallizer and a rotating connecting rod vertically penetrating the crystallizer, wherein an anti-blocking mechanism is also arranged in the crystallizer and is connected with the rotating connecting rod through a connecting block; the upper end of the crystallizer is provided with a feed inlet, and the lower end of the crystallizer is provided with a discharge outlet; the end point of the rotating connecting rod is also connected with a rotating mechanism to drive the rotating connecting rod to rotate; wherein, prevent stifled mechanism including setting up scraper and the stirring leaf on rotating the connecting rod, clear up material mouth and jar body. According to the invention, the material opening and the tank body are cleaned by the anti-blocking mechanism, so that the accumulation of materials in the tank body is effectively reduced, and the anti-blocking effect is realized.
Description
Technical Field
The invention belongs to the technical field of organic chemical separation, and particularly relates to an anti-blocking crystallization device for lactide purification.
Background
Under the existing chemical production conditions, the preparation of the lactide usually adopts a reduced pressure method or an atmospheric pressure method and respective corresponding matched equipment for preparation, the lactide prepared by the atmospheric pressure method or the reduced pressure method contains a certain amount of impurities, for example, the crude lactide prepared by taking an optical L-lactic acid solution as a raw material mainly comprises L-lactide, m-lactide, trace lactic acid, oligomer and the like, the lactide has high boiling point and high solidification point, has heat sensitivity, is easy to absorb water to generate ring-opening reaction, therefore, the purification difficulty of the lactide is large, the common lactide purification methods comprise extraction, rectification, crystallization and the like, wherein, the melting crystallization is to utilize the difference of freezing points among each component or key components of the separated substances, the mass transfer is controlled by adjusting the transmission of energy, so that the high-melting-point component of the mixture is crystallized and separated out in a molten state to achieve the purpose of analysis and purification.
Present melting crystallizer is mostly the tubular packed tower, sets up separator such as distributor, cloth membrane ware inside the packed tower, and the cloth membrane pipe of commonly using is mostly the tubulose, and the feed liquid gets into behind the cloth membrane pipe along the inner wall edge of tubulose cloth membrane pipe by the inlet pipe evenly flows in the cloth membrane pipe, forms the even ground that possesses certain thickness, the steady liquid film of flow pattern, prepares for follow-up heat transfer evaporation. However, the tubular material membrane distribution pipe is not uniform enough to cause non-ideal membrane distribution effect and low material separation degree.
Patent CN207608508U discloses a vertical heat transfer formula melting crystallizer, is equipped with the feed inlet including barrel, barrel upper end, and inside inlet pipe, liquid distributor and the material film distributor of being provided with of barrel, material film distributor be the same solid tube of a plurality of radiuses, all offer the helical groove of feed liquid evenly distributed on the side of every solid tube, the extending direction of helical groove is unanimous with the central line direction of solid tube. The melt crystallizer can effectively separate impurities in crude lactide to obtain L-lactide with the purity of 99.9 percent;
in addition, patent CN208426686U discloses a lactide purification device, which specifically includes: the heat exchanger comprises a vertical tank and a plurality of heat exchange tubes vertically arranged in the vertical tank; the top of the vertical tank is provided with a tube side fluid inlet, and the bottom of the vertical tank is provided with a tube side fluid outlet; an upper tube plate and a lower tube plate which are sealed with the inner wall of the vertical tank are respectively arranged at two ends of the heat exchange tube, and a shell side fluid inlet and a shell side fluid outlet are arranged on a closed space formed by the lower surface of the upper tube plate, the upper surface of the lower tube plate, the outer wall of the heat exchange tube and the inner wall of the vertical tank; a vacuum pumping port is arranged between the tube side fluid inlet and the upper tube plate of the vertical tank; a heating pipe is arranged in the inner cavity of the heat exchange pipe; the device provided by the invention can be used for efficiently separating and purifying the crude lactide product, and can reduce the times of lactide melt crystallization;
however, the lactide purification device provided by the prior patent is easy to generate clogging in the device during the purification process, thereby reducing the purification efficiency, so that an anti-blocking crystallization device for lactide purification is urgently needed.
Disclosure of Invention
The invention aims to provide an anti-blocking crystallization device for lactide purification, which solves the problems in the background technology.
The invention provides an anti-blocking crystallization device for lactide purification, which comprises a crystallizer and a rotating connecting rod vertically penetrating the crystallizer, wherein an anti-blocking mechanism is also arranged in the crystallizer; the end point of the rotating connecting rod is also connected with a rotating mechanism to drive the rotating connecting rod to rotate; wherein, prevent stifled mechanism and include scraper and the stirring leaf of connecting on rotating the connecting rod through the connecting block, clear up material mouth and jar body.
Further, the anti-blocking mechanism comprises a feed inlet anti-blocking mechanism and a discharge outlet anti-blocking mechanism; the feed inlet anti-blocking mechanism is arranged at the feed inlet, and the discharge outlet anti-blocking mechanism is arranged at the discharge outlet; the feed inlet anti-blocking mechanism comprises an upper scraper and an upper stirring blade which are arranged from top to bottom, the upper scraper is connected with the rotating connecting rod through a first connecting block, and the upper stirring blade is connected with the rotating connecting rod through a second connecting block; the discharge port anti-blocking mechanism comprises a lower scraper and a lower stirring blade, the lower scraper is arranged from bottom to top, the lower scraper is connected with the rotating connecting rod through a third connecting block, and the lower stirring blade is connected with the rotating connecting rod through a fourth connecting block.
Further, the upper scraper and the upper stirring blade are in the same plane, and the lower scraper and the lower stirring blade are in the same plane.
Further, the upper scraper is positioned at the joint of the feed inlet and the crystallizer, and the lower scraper is positioned at the joint of the discharge outlet and the crystallizer.
Furthermore, a connecting rod telescopic mechanism is connected to the rotating connecting rod, and the anti-blocking mechanism is controlled to move up and down through the rotating connecting rod.
Furthermore, the connecting rod telescopic mechanism is arranged at the upper end of the rotating mechanism and is connected with the rotating connecting rod through the rotating mechanism.
Furthermore, the connecting rod telescopic mechanism comprises a supporting rod connected with the rotating mechanism and a telescopic frame arranged at the upper end of the supporting rod, and the telescopic rod is fixedly connected with the telescopic frame;
the connecting rod telescopic mechanism further comprises a sliding connecting rod and a sliding block which are fixedly connected, the sliding connecting rod is connected with the telescopic rod, and the telescopic control sliding block of the telescopic rod moves up and down on the supporting rod.
Further, the rotating mechanism is a rotating motor and is arranged at the upper end of the rotating connecting rod.
Further, the feed inlet is funnel-shaped.
Furthermore, a valve is arranged at the discharge port.
Has the advantages that:
1. according to the anti-blocking crystallization device for lactide purification, during operation, the rotating motor drives the rotating connecting rod to rotate, so that the upper scraper, the lower scraper, the upper stirring blade and the lower stirring blade are driven to rotate, the upper scraper and the lower scraper can effectively clean a feeding port and a discharging port, the upper stirring blade and the lower stirring blade can also clean the top and the bottom of a crystallizer tank body while stirring materials, and particularly the joint of a crystallizer and the feeding port; in addition, the rotation of the stirring blades can also effectively avoid the deposition and condensation of materials;
2. the connecting rod telescopic mechanism drives the rotating connecting rod to move up and down in the crystallizer, so that the upper scraper and the lower scraper form thrust on materials at the feed inlet and the discharge outlet, the material outlet is cleaned, and blockage is effectively avoided;
3. the connecting rod telescopic mechanism comprises a supporting rod connected with the rotating mechanism and a telescopic frame arranged at the upper end of the supporting rod, the telescopic rod is fixedly connected with the telescopic frame, the connecting rod telescopic mechanism further comprises a sliding connecting rod and a sliding block which are fixedly connected, the sliding connecting rod and the telescopic rod are connected, the telescopic control sliding block of the telescopic rod moves up and down on the supporting rod, and the rotating connecting rod can be well driven to move up and down in the crystallizer.
Drawings
FIG. 1 is a schematic diagram of an operational state of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram illustrating another operational state of an embodiment of the present invention;
FIG. 3 is an enlarged schematic view at A in FIG. 1;
FIG. 4 is an enlarged schematic view at B of FIG. 1;
FIG. 5 is an enlarged schematic view at C of FIG. 1;
fig. 6 is a top view of an anti-clog mechanism according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the attached figure 1, the invention provides an anti-blocking crystallization device for lactide purification, which comprises a crystallizer 1 and a rotating connecting rod 2 vertically penetrating the crystallizer 1, wherein an anti-blocking mechanism 3 is also arranged in the crystallizer 1, a feed inlet 4 is arranged at the upper end of the crystallizer 1, and a discharge outlet 5 is arranged at the lower end of the crystallizer 1; the end point of the rotating connecting rod 2 is also connected with a rotating mechanism 6 which drives the rotating connecting rod 2 to rotate; the anti-blocking mechanism 3 comprises a scraper and a stirring blade which are connected to the rotating connecting rod 2 through a connecting block 7, and is used for cleaning the material port and the tank body;
in the present embodiment, the rotating mechanism 6 is a rotating motor, and is disposed at the upper end of the rotating link 2;
as shown in fig. 1-4, the anti-blocking mechanism 3 includes a feed inlet anti-blocking mechanism 31 and a discharge outlet anti-blocking mechanism 32; the feed inlet anti-blocking mechanism 31 is arranged at the feed inlet 4, and the discharge outlet anti-blocking mechanism 32 is arranged at the discharge outlet 5; the feed inlet anti-blocking mechanism 31 comprises an upper scraper 311 and an upper stirring blade 312 which are arranged from top to bottom, the upper scraper 311 is connected with the rotating connecting rod 2 through a first connecting block 71, and the upper stirring blade 312 is connected with the rotating connecting rod 2 through a second connecting block 72; the discharge port anti-blocking mechanism 32 comprises a lower scraper 321 and a lower stirring blade 322 which are arranged from bottom to top, the lower scraper 321 is connected with the rotating connecting rod 2 through a third connecting block 73, and the lower stirring blade 322 is connected with the rotating connecting rod 2 through a fourth connecting block 74;
the upper scraper 311 and the lower scraper 321 can effectively clean the feed inlet 4 and the discharge outlet 5, and the upper stirring blade 312 and the lower stirring blade 322 can also clean the top and the bottom of the tank body of the crystallizer 1 while stirring materials, in particular to the joint of the crystallizer 1 and the material port; in addition, the rotation of the stirring blades can also effectively avoid the deposition and the condensation of materials.
In a further embodiment, as shown in fig. 6, the upper scraper 311 and the upper stirring blade 312 are in the same plane, and the lower scraper 321 and the lower stirring blade 322 are in the same plane; the scraper and the stirring blade which are limited in the same plane can better prevent the material from being blocked.
Further, the upper scraper 311 is located at a connection position of the feed port 4 and the crystallizer 1, and the lower scraper 321 is located at a connection position of the discharge port 5 and the crystallizer 1.
In a further embodiment, a connecting rod telescopic mechanism 8 is further connected to the rotating connecting rod 2, and the anti-blocking mechanism 3 is controlled to move up and down through the rotating connecting rod 2; the material port and the crystallizer 1 tank body are cleaned while the anti-blocking mechanism 3 rotates, and the cleaning effect is better. In addition, the link mechanism 8 is connected to the support plate 10 for fixing, and in a further embodiment, the link mechanism 8 may be rotatably connected to the support plate 10, and the link mechanism 8 rotates around the support plate 10 as a pivot.
Further, the connecting rod telescopic mechanism 8 is arranged at the upper end of the rotating mechanism 6 and is connected with the rotating connecting rod 2 through the rotating mechanism 6;
as shown in fig. 5, the link mechanism 8 includes a support rod 81 connected to the rotating mechanism 6 and a telescopic frame 82 disposed at an upper end of the support rod 81, and the telescopic rod 84 is fixedly connected to the telescopic frame 82;
the link telescoping mechanism 8 further comprises a sliding link 83 and a sliding block 85 which are fixedly connected, the sliding link 83 is connected with the telescopic rod 84, and the telescopic control sliding block 85 of the telescopic rod 84 moves up and down on the support rod 81.
Further, the feed inlet 4 is funnel-shaped; in addition, a valve 9 is arranged at the discharge port 5.
The working principle is as follows: when the device works, the rotating motor drives the rotating connecting rod 2 to rotate, so that the upper scraper 311, the lower scraper 321, the upper stirring blade 312 and the lower stirring blade 322 are driven to rotate, and a material port and the crystallizer 1 are cleaned; as shown in fig. 1 and fig. 2, which are schematic structural diagrams of the present invention in different working states, wherein the telescopic rod 84 is in an extended state and a retracted state, and the telescopic control sliding block 85 of the telescopic rod 84 moves up and down on the support rod 81, so as to drive the rotating connecting rod 2 to move up and down in the crystallizer 1, so that the upper scraper 311 and the lower scraper 321 form a thrust on the materials at the feed inlet 4 and the discharge outlet 5, thereby cleaning the material inlet and effectively avoiding blockage.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The present invention is not limited to the above description of the embodiments, and those skilled in the art should, in light of the present disclosure, appreciate that many changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. An anti-blocking crystallization device for lactide purification is characterized in that: the crystallizer comprises a crystallizer and a rotating connecting rod vertically penetrating the crystallizer, wherein an anti-blocking mechanism is also arranged in the crystallizer, a feed inlet is formed in the upper end of the crystallizer, and a discharge outlet is formed in the lower end of the crystallizer; the end point of the rotating connecting rod is also connected with a rotating mechanism to drive the rotating connecting rod to rotate; wherein, prevent stifled mechanism and include scraper and the stirring leaf of connecting on rotating the connecting rod through the connecting block, clear up material mouth and jar body.
2. The anti-blocking crystallization device for lactide purification according to claim 1, wherein: the anti-blocking mechanism comprises a feed inlet anti-blocking mechanism and a discharge outlet anti-blocking mechanism; the feed inlet anti-blocking mechanism is arranged at the feed inlet, and the discharge outlet anti-blocking mechanism is arranged at the discharge outlet; the feed inlet anti-blocking mechanism comprises an upper scraper and an upper stirring blade which are arranged from top to bottom, the upper scraper is connected with the rotating connecting rod through a first connecting block, and the upper stirring blade is connected with the rotating connecting rod through a second connecting block; the discharge port anti-blocking mechanism comprises a lower scraper and a lower stirring blade, the lower scraper is arranged from bottom to top, the lower scraper is connected with the rotating connecting rod through a third connecting block, and the lower stirring blade is connected with the rotating connecting rod through a fourth connecting block.
3. The anti-blocking crystallization device for lactide purification according to claim 2, wherein: the upper scraper and the upper stirring blade are positioned in the same plane, and the lower scraper and the lower stirring blade are positioned in the same plane.
4. The anti-blocking crystallization device for lactide purification according to claim 2, wherein: the upper scraper is positioned at the joint of the feed inlet and the crystallizer, and the lower scraper is positioned at the joint of the discharge outlet and the crystallizer.
5. The anti-blocking crystallization device for lactide purification according to claim 1, wherein: and the rotating connecting rod is also connected with a connecting rod telescopic mechanism, and the anti-blocking mechanism is controlled to move up and down by rotating the connecting rod.
6. The anti-blocking crystallization device for lactide purification according to claim 5, wherein: the connecting rod telescopic mechanism is arranged at the upper end of the rotating mechanism and is connected with the rotating connecting rod through the rotating mechanism.
7. The anti-blocking crystallization device for lactide purification according to claim 6, wherein: the connecting rod telescopic mechanism comprises a supporting rod connected with the rotating mechanism and a telescopic frame arranged at the upper end of the supporting rod, and the telescopic rod is fixedly connected with the telescopic frame;
the connecting rod telescopic mechanism further comprises a sliding connecting rod and a sliding block which are fixedly connected, the sliding connecting rod is connected with the telescopic rod, and the telescopic control sliding block of the telescopic rod moves up and down on the supporting rod.
8. The anti-blocking crystallization device for lactide purification according to claim 1, wherein: the rotating mechanism is a rotating motor and is arranged at the upper end of the rotating connecting rod.
9. The anti-blocking crystallization device for lactide purification according to claim 1, wherein: the feed inlet is funnel-shaped.
10. The anti-blocking crystallization device for lactide purification according to claim 1, wherein: and a valve is also arranged at the discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005146.7A CN112076495A (en) | 2020-09-23 | 2020-09-23 | A anti-blocking crystallization device for lactide purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005146.7A CN112076495A (en) | 2020-09-23 | 2020-09-23 | A anti-blocking crystallization device for lactide purification |
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| Publication Number | Publication Date |
|---|---|
| CN112076495A true CN112076495A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011005146.7A Pending CN112076495A (en) | 2020-09-23 | 2020-09-23 | A anti-blocking crystallization device for lactide purification |
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| Country | Link |
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| CN (1) | CN112076495A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933092A (en) * | 2021-09-17 | 2022-01-14 | 江苏绿泰检测科技有限公司 | Comprehensive detection method and detection system for middle and lower layer soil |
| CN115489887A (en) * | 2022-09-28 | 2022-12-20 | 衡阳市大宇锌业有限公司 | Anti-blocking discharging device of zinc oxide storage hopper |
-
2020
- 2020-09-23 CN CN202011005146.7A patent/CN112076495A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933092A (en) * | 2021-09-17 | 2022-01-14 | 江苏绿泰检测科技有限公司 | Comprehensive detection method and detection system for middle and lower layer soil |
| CN115489887A (en) * | 2022-09-28 | 2022-12-20 | 衡阳市大宇锌业有限公司 | Anti-blocking discharging device of zinc oxide storage hopper |
| CN115489887B (en) * | 2022-09-28 | 2023-06-30 | 衡阳市大宇锌业有限公司 | Anti-blocking discharging device of zinc oxide bucket |
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