CN108926865B - A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP - Google Patents
A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP Download PDFInfo
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- CN108926865B CN108926865B CN201810638995.2A CN201810638995A CN108926865B CN 108926865 B CN108926865 B CN 108926865B CN 201810638995 A CN201810638995 A CN 201810638995A CN 108926865 B CN108926865 B CN 108926865B
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- reaction kettle
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- 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
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/38—Steam distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/76—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
- C07C69/80—Phthalic acid esters
- C07C69/82—Terephthalic acid esters
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- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a steam stripping evaporation device for production of environment-friendly plasticizer DOTP, which comprises a reaction kettle, wherein the upper end of the reaction kettle is arranged in an open manner, the upper end of the outer side surface of the reaction kettle is connected with the inner wall of a clamping groove at the lower surface of an upper cover in a sliding manner, a rubber ring is bonded at the position, corresponding to the reaction kettle, of the upper surface of the clamping groove at the lower surface of the upper cover, the lower surface of the rubber ring is contacted with the upper end of the upper cover, a submersible pump enables a solution to be sprayed out through a liquid inlet pipe, and the solution sprayed out from the liquid inlet pipe forms a conical liquid curtain under the action of a conical cover, so that the surface area of the solution is; the workman makes the screw rod rotatory through the dwang, thereby the length of screw rod rotation height-adjusting device to adjust the height of circular otter board, make the immersible pump can work in the solution of different liquid levels, improved this a steam stripping evaporation plant for production of environment-friendly plasticizer DOTP's suitability.
Description
Technical Field
The invention relates to the technical field of plasticizer production, in particular to a steam stripping evaporation device for producing an environment-friendly plasticizer DOTP.
Background
DOTP has low toxicity, high safety and strong water and oil resistance extraction performance, is always used as a nontoxic plasticizer and is allowed to be used in medical PVC products and various plastic toys. At present, the DOTP is produced industrially by a terephthalic acid (TPA) method (direct esterification method), wherein the TPA method comprises the steps of putting isooctanol and PTA into an esterification kettle according to a certain mass ratio, adding a catalyst, reacting for 10-12 hours at 170-230 ℃, and obtaining an esterification reaction end point when the acid value of an esterification solution is reduced to be below 0.2 mg.g < -1 >. After esterification, removing partial excessive alcohol by using esterification residual heat, then adding NaOH to neutralize unreacted monoester acid, reducing the acidity of the product, hydrolyzing the catalyst into solid flocculent titanium dioxide, dissolving the solid flocculent titanium dioxide in water, and separating the solid flocculent titanium dioxide from the ester. And then introducing steam under a vacuum state under reduced pressure, cleaning water and alcohol remained in the neutralization and washing process in a steam stripping mode, adding activated carbon and diatomite into the stripped crude ester, adsorbing pigments, impurities and the like in the crude ester, and finally filtering in a filter to obtain a pure product.
In most factories in the stripping section, a method of pumping vacuum in a kettle and directly introducing steam for stripping is adopted, and the stripping production efficiency of the existing equipment is low, so that the stripping production time is prolonged.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects and provide a stripping evaporation device for producing environment-friendly plasticizer DOTP, a submersible pump enables a solution to be sprayed out through a liquid inlet pipe, the solution sprayed out from the liquid inlet pipe forms a conical liquid curtain under the action of a conical cover, the surface area of the solution is increased, the evaporation of water and alcohol in the solution is promoted, the production efficiency is high, the stripping production time is short, and the problems in the background technology can be effectively solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a strip evaporation plant for production of environment-friendly plasticizer DOTP, which comprises a reaction vessel, the open setting in reation kettle's upper end, the upper end of reation kettle lateral surface and the inner wall sliding connection in upper cover lower surface joint groove, upper cover lower surface joint groove upper surface bonds to have the rubber ring to correspond reation kettle's position, the lower surface of rubber ring and the upper end contact of upper cover, the gas outlet of upper cover upper surface and the air inlet intercommunication of check valve, the gas outlet of check valve and the air inlet intercommunication of exhaust tube, the gas outlet of exhaust tube and the air inlet intercommunication of outside vacuum pump, the air inlet of upper cover and the gas outlet intercommunication of air inlet valve.
Reation kettle's lateral surface is fixed with the PLC controller, the inside lower fixed surface of reation kettle has the electric heating board, reation kettle's inside is equipped with circular otter board, circular otter board lower fixed surface has three high adjusting device, the upper surface of circular otter board is fixed with the immersible pump through the mount, the water inlet of immersible pump and the lower extreme of feed liquor pipe pass through flange joint, the upper end of feed liquor pipe is installed liquid and is dispersed the device, the lower fixed surface of circular otter board has temperature sensor, the input of PLC controller and external power source's output electricity are connected, the output of PLC controller is connected with the input of electric heating board and the input electricity of immersible pump respectively, the input of PLC controller and temperature sensor's.
As a preferred technical scheme, an upper cover fixing device is installed at the upper end of the outer side surface of the reaction kettle, a clamping plate is fixed on the outer side surface of the upper cover at a position corresponding to the upper cover fixing device, and a clamping groove is formed in one end, far away from the upper cover, of the clamping plate.
As a preferable technical scheme of the invention, the number of the upper cover fixing devices is three, and the three upper cover fixing devices are distributed at equal angles around the axis of the reaction kettle.
As a preferred technical scheme of the invention, the upper cover fixing device comprises a fixing screw rod, the lower end of the fixing screw rod is hinged with the upper end of the outer side surface of the reaction kettle through a hinge seat, the upper end of the fixing screw rod is in threaded connection with a butterfly nut, and the side surface of the fixing screw rod is clamped with a clamping groove on a clamping plate.
As a preferred technical scheme of the invention, the three height adjusting devices are distributed at equal angles around the axis of the circular screen plate, and the circular screen plate is positioned above the electric heating plate.
As a preferred technical scheme of the invention, the height adjusting device comprises a bearing, the bearing is fixed on the lower surface of the screen plate through a mounting frame, an inner ring of the bearing is fixedly connected with the upper end of a screw rod, the lower end of the screw rod is in threaded connection with the upper part of the inner wall of a screw pipe, and the lower end of the screw pipe is arranged in a sealing manner.
As a preferred technical scheme of the invention, two rotating rods are fixed at the upper end of the side surface of the screw rod, and the two rotating rods are symmetrically arranged at the left side and the right side of the screw rod.
As a preferred technical scheme of the invention, the liquid dispersing device comprises a transverse connecting rod, two ends of the transverse connecting rod are fixedly connected with the inner wall of the liquid inlet pipe, the side surface of the transverse connecting rod is fixedly connected with the lower end of the vertical connecting rod, and the upper end of the vertical connecting rod is fixedly connected with the side surface inside the conical cover.
As a preferable technical scheme of the invention, the axis of the conical cover is coincident with the axis of the liquid inlet pipe, and the diameter of the outer side surface of the liquid inlet pipe is smaller than that of the lower end of the conical cover.
As a preferable technical scheme of the invention, eight turbulence columns are fixed on the side edges of the inner side surface of the conical cover, and the eight turbulence columns are distributed at equal angles around the axis of the conical cover.
Compared with the prior art, the invention has the beneficial effects that: according to the stripping evaporation device for the production of the environment-friendly plasticizer DOTP, the submersible pump enables the solution to be sprayed out through the liquid inlet pipe, the solution sprayed out of the liquid inlet pipe forms a conical liquid curtain under the action of the conical cover, the surface area of the solution is increased, the evaporation of water and alcohol in the solution is promoted, the production efficiency is high, and the stripping production time is short; the workman makes the screw rod rotatory through the dwang, thereby the length of screw rod rotation height-adjusting device to adjust the height of circular otter board, make the immersible pump can work in the solution of different liquid levels, improved originally in the steam stripping evaporation plant's of environment-friendly plasticizer DOTP production suitability.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is an enlarged view of the structure at A of the present invention;
FIG. 3 is a schematic structural view of the upper cover fixing device of the present invention;
fig. 4 is a schematic structural view of the height adjusting device of the present invention.
In the figure: 1 exhaust tube, 2 check valves, 3 upper covers, 4 rubber rings, 5 reation kettle, 6 electric heating boards, 7 height adjusting device, 71 bearing, 72 screw rods, 73 screwed pipe, 8 dwang, 9 liquid diverging device, 91 taper cover, 92 vertical connecting rod, 93 transverse connecting rod, 10 PLC controller, 11 air inlet valve, 12 immersible pump, 13 feed liquor pipe, 14 temperature sensor, 15 circular otter board, 16 upper cover fixing device, 161 butterfly nut, 162 fixed screw, 163 articulated seat, 17 turbulence post, 18 joint board, 19 vertical pipe.
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.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a strip evaporation plant for production of environment-friendly plasticizer DOTP, including reation kettle 5, the open setting in upper end of reation kettle 5, the upper end of 5 lateral surfaces of reation kettle and the inner wall sliding connection in 3 lower surface joint grooves of upper cover, 3 lower surface joint grooves of upper cover upper surface correspond reation kettle 5's position bonding has rubber ring 4, the lower surface of rubber ring 4 and the upper end contact of upper cover 3, rubber ring 4 has improved the gas tightness between reation kettle 5 and the upper cover 3, the gas outlet of 3 upper surfaces of upper cover and the air inlet intercommunication of check valve 2, the gas outlet of check valve 2 and the air inlet intercommunication of exhaust tube 1, the gas outlet of exhaust tube 1 and the air inlet intercommunication of outside vacuum pump, the gas inlet of upper cover 3 and the gas outlet intercommunication of air inlet valve 11.
An upper cover fixing device 16 is installed at the upper end of the outer side surface of the reaction kettle 5, a clamping plate 18 is fixed on the outer side surface of the upper cover 3 at a position corresponding to the upper cover fixing device 16, a clamping groove is formed in one end, away from the upper cover 3, of the clamping plate 18, the number of the upper cover fixing devices 16 is three, the three upper cover fixing devices 16 are distributed around the axis of the reaction kettle 5 at equal angles, the upper cover fixing device 16 comprises a fixing screw 162, the lower end of the fixing screw 162 is hinged with the upper end of the outer side surface of the reaction kettle 5 through a hinge seat 163, the upper end of the fixing screw 162 is in threaded connection with a butterfly nut 161, the side surface of the fixing screw 162 is clamped with the clamping groove on the clamping plate 18, a worker enables the upper end of the outer side surface of the reaction kettle 5 to be in sliding connection with the inner wall of the clamping groove on the lower surface of the, the lower surface of wing nut 161 contacts the upper surface of clamping plate 18, so that reaction vessel 5 and upper cover 3 are firmly fixed.
A PLC (programmable logic controller) 10 is fixed on the outer side surface of a reaction kettle 5, an electric heating plate 6 is fixed on the lower surface inside the reaction kettle 5, a circular screen plate 15 is arranged inside the reaction kettle 5, three height adjusting devices 7 are fixed on the lower surface of the circular screen plate 15, a submersible pump 12 is fixed on the upper surface of the circular screen plate 15 through a fixing frame, a water inlet of the submersible pump 12 is connected with the lower end of a liquid inlet pipe 13 through a flange, a liquid dispersing device 9 is installed at the upper end of the liquid inlet pipe 13, a temperature sensor 14 is fixed on the lower surface of the circular screen plate 15, the input end of the PLC 10 is electrically connected with the output end of an external power supply, the output end of the PLC 10 is respectively electrically connected with the input end of the electric heating plate 6 and the input end of the submersible pump 12, the input end of the PLC 10 is electrically connected with the output end, solution in the electric heating plate 6 heats the reaction kettle 5, the submersible pump 12 enables the solution to be sprayed out through the liquid inlet pipe 13, and the solution sprayed out from the liquid inlet pipe 13 forms a conical liquid curtain under the action of the conical cover 91, so that the surface area of the solution is increased, evaporation of water and alcohol in the solution is promoted, the production efficiency is high, and the stripping production time is short.
Three height control device 7 are around the equal angular distribution of the axis of circular otter board 15, circular otter board 15 is located the top of electric heating board 6, height control device 7 includes bearing 71, bearing 71 passes through the mounting bracket to be fixed at the lower surface of otter board 15, the inner ring of bearing 71 and the upper end fixed connection of screw rod 72, the lower extreme of screw rod 72 and the upper portion threaded connection of screwed pipe 73 inner wall, the lower extreme of screwed pipe 73 is airtight setting, the upper end of screw rod 72 side is fixed with two dwang 8, two dwang 8 are in the left and right sides symmetry setting of screw rod 72, the workman makes screw rod 72 rotatory through dwang 8, thereby the length of height control device 7 is adjusted in the rotation of screw rod 72, thereby adjust the height of circular otter board 15, make immersible pump 12 can work in the solution of different liquid levels, the suitability of this steam stripping evaporation plant.
The PLC controller 10 controls the electric heating plate 6 and the submersible pump 12 as a means commonly used in the art.
When in use: the workman makes the upper end of 5 lateral surfaces of reation kettle and the inner wall sliding connection in the 3 lower surface joint grooves of upper cover, and rubber ring 4 has improved the gas tightness between reation kettle 5 and the upper cover 3, and workman's rotatory clamping screw 162 makes clamping groove joint on clamping screw 162 and the joint board 18, and the rotatory butterfly nut 161 of workman, the lower surface of butterfly nut 161 and the upper surface contact of joint board 18 for reation kettle 5 is fixed firm with upper cover 3.
The workman makes the screw rod 72 rotatory through dwang 8, thereby the rotatory length of adjusting height adjusting device 7 of screw rod 72 to adjust circular otter board 15's height, make immersible pump 12 can work in the solution of different liquid levels, improved this a steam stripping evaporation plant's that is used for environment-friendly plasticizer DOTP production suitability.
After the stripping is completed, the worker turns on the gas inlet valve 11, and the external gas enters the reaction kettle 5 through the gas inlet valve 11.
According to the invention, the submersible pump 12 enables the solution to be sprayed out through the liquid inlet pipe 13, and the solution sprayed out from the liquid inlet pipe 13 forms a conical liquid curtain under the action of the conical cover 91, so that the surface area of the solution is increased, the evaporation of water and alcohol in the solution is promoted, the production efficiency is high, and the steam stripping production time is short; the workman makes the screw rod 72 rotatory through dwang 8, thereby the rotatory length of adjusting height adjusting device 7 of screw rod 72 to adjust circular otter board 15's height, make immersible pump 12 can work in the solution of different liquid levels, improved this a steam stripping evaporation plant's that is used for environment-friendly plasticizer DOTP production suitability.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP, includes reation kettle (5), its characterized in that: the upper end of the reaction kettle (5) is arranged in an open mode, the upper end of the outer side face of the reaction kettle (5) is connected with the inner wall of the upper cover (3) lower surface clamping groove in a sliding mode, a rubber ring (4) is bonded to the position, corresponding to the reaction kettle (5), of the upper surface of the upper cover (3) lower surface clamping groove, the lower surface of the rubber ring (4) is in contact with the upper end of the upper cover (3), the air outlet of the upper surface of the upper cover (3) is communicated with the air inlet of the one-way valve (2), the air outlet of the one-way valve (2) is communicated with the air inlet of the air exhaust pipe (1), the air outlet of the air exhaust pipe (1) is communicated with the air inlet of an external vacuum pump, and the;
a PLC (programmable logic controller) 10 is fixed on the outer side surface of the reaction kettle 5, an electric heating plate 6 is fixed on the lower surface inside the reaction kettle 5, a circular screen plate 15 is arranged inside the reaction kettle 5, three height adjusting devices 7 are fixed on the lower surface of the circular screen plate 15, a submersible pump 12 is fixed on the upper surface of the circular screen plate 15 through a fixing frame, a water inlet of the submersible pump 12 is connected with the lower end of a liquid inlet pipe 13 through a flange, a liquid dispersing device 9 is installed at the upper end of the liquid inlet pipe 13, the liquid dispersing device 9 comprises a transverse connecting rod 93, two ends of the transverse connecting rod 93 are fixedly connected with the inner wall of the liquid inlet pipe 13, the side surface of the transverse connecting rod 93 is fixedly connected with the lower end of a vertical connecting rod 92, the upper end of the vertical connecting rod 92 is fixedly connected with the side surface inside a conical cover 91, the axis of toper cover (91) and the axis coincidence of feed liquor pipe (13), the diameter of feed liquor pipe (13) lateral surface is less than the diameter of toper cover (91) lower extreme, the side of toper cover (91) inside side is fixed with eight turbulence posts (17), angular distribution such as axis around toper cover (91) is equalled in eight turbulence posts (17), the lower fixed surface of circular otter board (15) has temperature sensor (14), the input of PLC controller (10) and external power source's output electricity are connected, the output of PLC controller (10) is connected with the input of electric heating board (6) and the input electricity of immersible pump (12) respectively, the input of PLC controller (10) and the output electricity of temperature sensor (14) are connected.
2. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 1, characterized in that: an upper cover fixing device (16) is installed at the upper end of the outer side face of the reaction kettle (5), a clamping plate (18) is fixed on the outer side face of the upper cover (3) corresponding to the upper cover fixing device (16), and a clamping groove is formed in one end, far away from the upper cover (3), of the clamping plate (18).
3. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 2, characterized in that: the number of the upper cover fixing devices (16) is three, and the three upper cover fixing devices (16) are distributed around the axis of the reaction kettle (5) at equal angles.
4. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 2, characterized in that: the upper cover fixing device (16) comprises a fixing screw rod (162), the lower end of the fixing screw rod (162) is hinged to the upper end of the outer side face of the reaction kettle (5) through a hinge seat (163), the upper end of the fixing screw rod (162) is in threaded connection with a butterfly nut (161), and the side face of the fixing screw rod (162) is clamped with a clamping groove in a clamping plate (18).
5. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 1, characterized in that: the three height adjusting devices (7) are distributed around the axis of the circular screen plate (15) at equal angles, and the circular screen plate (15) is positioned above the electric heating plate (6).
6. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 1, characterized in that: the height adjusting device (7) comprises a bearing (71), the bearing (71) is fixed on the lower surface of the screen plate (15) through a mounting frame, an inner ring of the bearing (71) is fixedly connected with the upper end of a screw rod (72), the lower end of the screw rod (72) is in threaded connection with the upper part of the inner wall of a solenoid (73), and the lower end of the solenoid (73) is arranged in a sealing mode.
7. The stripping evaporation plant for the production of environment-friendly plasticizer DOTP according to claim 6, characterized in that: the upper end of the side face of the screw rod (72) is fixed with two rotating rods (8), and the two rotating rods (8) are symmetrically arranged on the left side and the right side of the screw rod (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638995.2A CN108926865B (en) | 2018-06-20 | 2018-06-20 | A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638995.2A CN108926865B (en) | 2018-06-20 | 2018-06-20 | A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP |
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| Publication Number | Publication Date |
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| CN108926865A CN108926865A (en) | 2018-12-04 |
| CN108926865B true CN108926865B (en) | 2021-06-04 |
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| CN201810638995.2A Active CN108926865B (en) | 2018-06-20 | 2018-06-20 | A steam stripping evaporation plant for production of environment-friendly plasticizer DOTP |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7431806B2 (en) * | 2002-09-20 | 2008-10-07 | Lev Group, Llc | Low energy vacuum distillation method and apparatus |
| CN2668216Y (en) * | 2003-10-30 | 2005-01-05 | 原玉明 | Methanal removing kettle |
| CN204417039U (en) * | 2014-08-27 | 2015-06-24 | 郭嘉川 | A kind of multiple-effect manual type diving pump jacking system |
| CN204767483U (en) * | 2015-06-04 | 2015-11-18 | 江阴市江中设备制造有限公司 | Fruit vegetables atomizing enrichment facility |
| CN205815175U (en) * | 2016-06-24 | 2016-12-21 | 远大医药黄石飞云制药有限公司 | A kind of alcohol produced for Chinese medicine concentrates unit |
| CN206577653U (en) * | 2017-01-10 | 2017-10-24 | 广州都邦材料科技有限公司 | A kind of adhesive article manufactures raw material proportioning device |
| CN206910865U (en) * | 2017-07-12 | 2018-01-23 | 云南锦润生物科技有限公司 | A kind of high efficiente callback device of biology extraction alcohol |
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