CN116637390A - Operation method of secondary purification device for refining lactic acid - Google Patents
Operation method of secondary purification device for refining lactic acid Download PDFInfo
- Publication number
- CN116637390A CN116637390A CN202310661113.5A CN202310661113A CN116637390A CN 116637390 A CN116637390 A CN 116637390A CN 202310661113 A CN202310661113 A CN 202310661113A CN 116637390 A CN116637390 A CN 116637390A
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- China
- Prior art keywords
- shell
- inner tank
- scraping plate
- transmission shaft
- phase outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004310 lactic acid Substances 0.000 title claims abstract description 20
- 235000014655 lactic acid Nutrition 0.000 title claims abstract description 20
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 238000007670 refining Methods 0.000 title claims abstract description 13
- 238000007790 scraping Methods 0.000 claims abstract description 51
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000004821 distillation Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 33
- 239000004744 fabric Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 11
- 238000000199 molecular distillation Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 description 2
- 239000001527 calcium lactate Substances 0.000 description 2
- 229960002401 calcium lactate Drugs 0.000 description 2
- 235000011086 calcium lactate Nutrition 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 238000004042 decolorization Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920002261 Corn starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000526 short-path distillation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/12—Molecular distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
An inner tank is arranged in a shell of an operation method of a secondary purification device for refining lactic acid, the shell and the inner tank form a shell, a heating mechanism is arranged between the shell and the inner tank, a vacuumizing tube is arranged on one side of the top end of the shell, a feeding tube is arranged on the other side of the top end of the shell, a motor is arranged in the middle of the top end of the shell, a heavy phase outlet is arranged on one side of the lower end of the shell, a light phase outlet is arranged at the bottom of the shell, a distributing mechanism is vertically arranged at the upper end in the condenser shell in the middle of the inner bottom of the shell, a scraping plate mechanism is arranged below the distributing mechanism, a transmission shaft is arranged between the motor and the scraping plate mechanism, and the motor drives the scraping plate mechanism to rotate through the transmission shaft; according to the invention, the first scraping plate and the second scraping plate are integrated into one set of equipment, so that the time of secondary distillation is shortened, the requirement on high vacuum can be easily realized, the product quality is improved, and the investment cost and the distillation cost of enterprises are greatly reduced.
Description
Technical Field
The invention relates to the field of refined lactic acid production equipment, in particular to an operation method of a secondary purification device for refined lactic acid.
Background
Lactic acid is a fine chemical product of food chemical industry, and the preparation process comprises the steps of taking corn or potato starch and calcium carbonate as main raw materials, adding microorganism strains, carrying out liquid fermentation and filtration to obtain calcium lactate liquid, carrying out processes such as concentration, acidolysis and the like, filtering calcium sulfate, separating to obtain industrial-grade crude lactic acid, and finally refining and purifying the industrial-grade crude lactic acid by a physical or chemical method to obtain the finished product lactic acid. In the prior art, many refining methods for industrial-grade crude lactic acid, such as a calcium lactate crystallization method, an esterification method, an extraction method, an ion exchange activated carbon decolorization method, a distillation method and the like, wherein the crystallization method has complicated steps; organic solvents are introduced by an esterification method and an extraction method, so that the method is not suitable for producing food and medical grade lactic acid; the ion exchange activated carbon decolorization method has problems in preparation and regeneration of separating agents; the distillation method is a physical purification method, especially short-path distillation and molecular distillation are novel distillation technologies which appear in recent years, at present, the existing short-path molecular distillation in the market has smaller treatment capacity, the product requirement can be met only by using a plurality of sets of short-path molecular distillation equipment for twice purification of the lactic acid, the investment cost of enterprises is greatly improved, and the energy consumption of the equipment is high.
In view of the above, a method of operating a secondary purification apparatus for refining lactic acid has been developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an operation method of a secondary purification device for refining lactic acid, wherein a first scraping plate and a second scraping plate are integrated into one set of equipment, so that the time for secondary distillation is shortened, the requirement on high vacuum can be easily met, the product quality is improved, and the investment cost and the distillation cost of enterprises are greatly reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme: an operation method of a secondary purification device for refining lactic acid, the secondary short-path molecular distillation device comprises the following steps: the device comprises a shell, an inner tank, a heating mechanism, a vacuum tube, a motor, a feeding pipe, a material distribution pipe, a liquid distribution disc, a transmission shaft, a light phase outlet, a rotary table, a support plate, a first scraping plate, a second scraping plate, a screw, a spring, a condenser and a heavy phase outlet; an inner tank is arranged in the shell, the shell and the inner tank form a shell, a heating mechanism is arranged between the shell and the inner tank, a vacuumizing pipe is arranged on one side of the top end of the shell, a feeding pipe is arranged on the other side of the top end of the shell, a motor is arranged in the middle of the top end of the shell, a heavy phase outlet is arranged on one side of the lower end of the shell, a light phase outlet is arranged at the bottom of the shell, a distributing mechanism is vertically arranged at the upper end in the middle of the inner bottom surface of the shell, a scraping plate mechanism is arranged below the distributing mechanism, a transmission shaft is arranged between the motor and the scraping plate mechanism, and the motor drives the scraping plate mechanism to rotate through the transmission shaft;
the scraper mechanism has the structure that: at least two vertical extension boards are evenly distributed on the lower surface of the rotary table, a first scraping board and a second scraping board are sequentially arranged on the outer side of the extension board from top to bottom, a connecting plate is arranged between the first scraping board and the extension board, a screw rod is arranged between the second scraping board and the extension board, the front end of the screw rod is fixedly arranged on the second scraping board, a limit nut is arranged after the rear end of the screw rod passes through a reserved hole on the extension board, a spring is sleeved on the screw rod between the second scraping board and the extension board, and the first scraping board and the second scraping board are arc-shaped.
The structure of the material distribution mechanism is as follows: the upper end in the casing sets up annular cloth pipe, and cloth pipe communicates with each other with the inlet pipe, evenly distributed discharge gate on the cloth pipe, and the below of cloth pipe sets up conical branch liquid dish, and the lower extreme of transmission shaft passes the branch liquid dish, and the transmission shaft drives the branch liquid dish and rotates.
The space between the first scraping plate and the inner tank is 0.4-1mm, the space between the second scraping plate 14 and the inner tank 2 is 0.1-0.4mm, and splash-proof plates are arranged on one side of the first scraping plate and one side of the second scraping plate.
The bottom surface in the casing be the inclined plane, the lower extreme of bottom surface extends to heavy phase export.
Firstly, connect the device with other equipment and constitute a complete equipment, then debug, and begin to use, start heating mechanism to heat this device earlier, with the temperature intensify to suitable temperature, the rethread inlet pipe is with the raw materials feeding in the cloth pipe, begin to spill cloth, annular cloth pipe is evenly distributed the raw materials at the liquid dish with the branch, simultaneously, start the motor, the motor drives liquid dish and scraper blade mechanism through the transmission shaft and rotates, the material on the liquid dish is by even throwing to the inner wall of inner tank because of centrifugal force when rotatory, and flow down along the inner wall of inner tank, first scraper blade evenly distributes the raw materials on the inner tank wall into the liquid film of certain thickness, heating mechanism makes the raw materials on the inner tank realize light and heavy component separation, afterwards light component flows down along the condenser outlet discharge after the condenser condensation into liquid, heavy component flows down along the inner wall of inner tank, the second scraper blade evenly distributes into very thin liquid film with the heavy component, thereby volatile material in the heavy component is better with the realization second grade distillation tank is by the volatile material in the light phase, realize the second grade distillation tank is discharged down along the condenser outlet of heavy phase after the condenser flows down.
The beneficial effects of the invention are as follows: according to the invention, the first scraping plate and the second scraping plate are integrated into one set of equipment, so that the time of secondary distillation is shortened, the high vacuum requirement can be easily realized, the product quality is improved, and the investment cost and the distillation cost of enterprises are greatly reduced; the present invention is described in detail in the prior art.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a general assembly structure;
in the figure: the device comprises a shell 1, an inner tank 2, a heating mechanism 3, a vacuumizing tube 4, a motor 5, a feeding pipe 6, a distributing pipe 7, a liquid separating disc 8, a transmission shaft 9, a light phase outlet 10, a rotary table 11, a support plate 12, a first scraping plate 13, a second scraping plate 14, a screw 15, a spring 16, a condenser 17 and a heavy phase outlet 18.
Detailed Description
The invention is further described in detail below with reference to examples and embodiments:
example 1
An inner tank 2 is arranged in the shell 1, the shell 1 and the inner tank 2 form a shell, a heating mechanism 3 is arranged between the shell 1 and the inner tank 2, a vacuumizing tube 4 is arranged on one side of the top end of the shell, a feeding pipe 6 is arranged on the other side of the top end of the shell, a motor 5 is arranged in the middle of the top end of the shell, a heavy phase outlet 18 is arranged on one side of the lower end of the shell, a light phase outlet 10 is arranged at the bottom of the shell, a condenser 17 is vertically arranged in the middle of the bottom surface of the shell, a distributing mechanism is arranged at the upper end in the shell, a scraping plate mechanism is arranged below the distributing mechanism, a transmission shaft 9 is arranged between the motor 5 and the scraping plate mechanism, and the motor 5 drives the scraping plate mechanism to rotate through the transmission shaft 9;
the scraper mechanism has the structure that: at least two vertical supporting plates 12 are evenly distributed on the lower surface of the rotary table 11, a first scraping plate 13 and a second scraping plate 14 are sequentially arranged on the outer side of the supporting plate 12 from top to bottom, a connecting plate is arranged between the first scraping plate 13 and the supporting plate 12, a screw 15 is arranged between the second scraping plate 14 and the supporting plate 12, the front end of the screw 15 is fixedly arranged on the second scraping plate, a limit nut is arranged after the rear end of the screw 15 passes through a reserved hole on the supporting plate 12, a spring 16 is sleeved on the screw 15 between the second scraping plate 14 and the supporting plate 12, and the first scraping plate 13 and the second scraping plate 14 are arc-shaped.
Example 2
The structure of the material distribution mechanism is as follows: the upper end in the casing sets up annular cloth pipe 7, and cloth pipe 7 communicates with each other with inlet pipe 6, evenly distributed discharge gate on the cloth pipe 7, and the below of cloth pipe 7 sets up conical branch liquid dish 8, and the lower extreme of transmission shaft 9 passes branch liquid dish 8, and transmission shaft 9 drives branch liquid dish 8 and rotates.
Example 3
The space between the first scraping plate 13 and the inner tank 2 is 0.4-1mm, the space between the second scraping plate 14 and the inner tank 2 is 0.1-0.2mm, and splash shields are arranged on one side of the first scraping plate 13 and one side of the second scraping plate 14.
Example 4
The bottom surface in the shell is an inclined surface, and the lower end of the bottom surface extends to the heavy phase outlet 18.
Example 5
Firstly, connect the device with other equipment to form a complete equipment, then debug, and begin to use, firstly start heating mechanism to heat this device, with the temperature intensify to suitable temperature, the raw materials is sent into cloth pipe 7 through inlet pipe 6 again, begin to spill cloth, annular cloth pipe 7 evenly distributes the raw materials at dividing liquid dish 8, simultaneously start motor 5, motor 5 drives dividing liquid dish 8 and scraper mechanism through transmission shaft 9 and rotates, the material on dividing liquid dish 8 is by centrifugal force effect by even throwing on the inner wall of inner tank 2, and flow down along the inner wall of inner tank 2, first scraper blade 13 evenly distributes the raw materials on the wall of inner tank 2 into the liquid film of certain thickness, heating mechanism 3 makes the raw materials on the inner tank 2 realize light and heavy components separation, afterwards light components flow down condenser 17 follow condenser 17 and discharge from light phase outlet 9 after the condensation, heavy components flow down along the inner wall of inner tank 2, second scraper blade 14 evenly distributes very thin liquid film, thereby better get rid of heavy components from light components down the inner wall of inner tank 2 through the better still, realize the effect of evaporating and discharging heavy components from light phase to the second evaporator 17 along the inner wall of inner tank 2, realize the separation of heavy components by distillation and the second evaporator, the effect of evaporating and the heavy components is discharged down along the inner wall of the light phase outlet 9.
Claims (5)
1. An operation method of a secondary purification device for refining lactic acid, the secondary short-path molecular distillation device comprises the following steps: the device comprises a shell (1), an inner tank (2), a heating mechanism (3), a vacuumizing tube (4), a motor (5), a feeding pipe (6), a distributing pipe (7), a liquid separating disc (8), a transmission shaft (9), a light phase outlet (10), a rotary disc (11), a support plate (12), a first scraper (13), a second scraper (14), a screw (15), a spring (16), a condenser (17) and a heavy phase outlet (18); the method is characterized in that: an inner tank (2) is arranged in a shell (1), the shell (1) and the inner tank (2) form a shell, a heating mechanism (3) is arranged between the shell (1) and the inner tank (2), a vacuumizing tube (4) is arranged on one side of the top end of the shell, a feeding tube (6) is arranged on the other side of the top end of the shell, a motor (5) is arranged in the middle of the top end of the shell, a heavy phase outlet (18) is arranged on one side of the lower end of the shell, a light phase outlet (10) is arranged at the bottom of the shell, a material distributing mechanism is vertically arranged at the upper end in the shell of a condenser (17), a scraping mechanism is arranged below the material distributing mechanism, a transmission shaft (9) is arranged between the motor (5) and the scraping mechanism, and the motor (5) drives the scraping mechanism to rotate through the transmission shaft (9);
the scraper mechanism has the structure that: at least two vertical extension boards (12) of carousel (11) lower surface evenly distributed, extension board (12) outside is from top to bottom set gradually first scraper blade (13), second scraper blade (14), set up the connecting plate between first scraper blade (13) and extension board (12), set up screw rod (15) between second scraper blade (14) and extension board (12), the front end of screw rod (15) is fixed to be set up on the second scraper blade, set up limit nut after the rear end of screw rod (15) passes the preformed hole on extension board (12), cover is established spring (16) on screw rod (15) between second scraper blade (14) and extension board (12), first scraper blade (13) and second scraper blade (14) be convex.
2. The method of operating a secondary purification apparatus for refining lactic acid according to claim 1, wherein: the structure of the material distribution mechanism is as follows: the upper end in the casing sets up annular cloth pipe (7), and cloth pipe (7) communicate with each other with inlet pipe (6), evenly distributed discharge gate on cloth pipe (7), and the below of cloth pipe (7) sets up conical branch liquid dish (8), and the lower extreme of transmission shaft (9) passes branch liquid dish (8), and transmission shaft (9) drive branch liquid dish (8) rotate.
3. The method of operating a secondary purification apparatus for refining lactic acid according to claim 1, wherein: the space between the first scraping plate (13) and the inner tank (2) is 0.4-1mm, the space between the second scraping plate (14) and the inner tank (2) is 0.1-0.2mm, and splash-proof plates are arranged on one sides of the first scraping plate (13) and one side of the second scraping plate (14).
4. The method of operating a secondary purification apparatus for refining lactic acid according to claim 1, wherein: the bottom surface in the casing is the inclined plane, and the lower extreme of bottom surface extends to heavy phase export (18).
5. The method of operating a secondary purification apparatus for refining lactic acid according to claim 1, wherein: firstly, connecting the device with other equipment to form a complete device, debugging and starting to use, firstly starting a heating mechanism to heat the device, heating the device to a proper temperature, then sending raw materials into a material distribution pipe (7) through a material inlet pipe (6), starting to distribute, uniformly distributing the raw materials on a liquid distribution disc (8) through the circular material distribution pipe (7), simultaneously starting a motor (5), driving the liquid distribution disc (8) and a scraping plate mechanism to rotate through a transmission shaft (9) by the motor (5), uniformly throwing the materials on the liquid distribution disc (8) onto the inner wall of an inner tank (2) due to the centrifugal force when the liquid distribution disc (8) rotates, and downwards flowing along the inner wall of the inner tank (2), the first scraper (13) uniformly distributes the raw materials on the wall surface of the inner tank (2) into a liquid film with a certain thickness, the heating mechanism (3) enables the raw materials on the inner tank (2) to realize light and heavy component separation, then the light components are condensed into liquid through the condenser (17) and then flow downwards along the condenser (17) to be discharged from the light phase outlet 9, the heavy components flow downwards along the inner wall of the inner tank (2), the second scraper (14) uniformly distributes the heavy components into a very thin liquid film, thereby better volatilizing volatile substances in the heavy components to achieve better separation effect, the light components after the second distillation are condensed into liquid through the condenser (17) and then flow downwards along the condenser (17) to be discharged from the light phase outlet 9, the heavy component flows downwards along the inner wall of the inner tank (2) and is discharged from the heavy phase outlet (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310661113.5A CN116637390A (en) | 2023-06-06 | 2023-06-06 | Operation method of secondary purification device for refining lactic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310661113.5A CN116637390A (en) | 2023-06-06 | 2023-06-06 | Operation method of secondary purification device for refining lactic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116637390A true CN116637390A (en) | 2023-08-25 |
Family
ID=87622782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310661113.5A Pending CN116637390A (en) | 2023-06-06 | 2023-06-06 | Operation method of secondary purification device for refining lactic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116637390A (en) |
-
2023
- 2023-06-06 CN CN202310661113.5A patent/CN116637390A/en active Pending
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