CN204676019U - A kind of solvent treatment system of pyromellitic acid anhydride - Google Patents
A kind of solvent treatment system of pyromellitic acid anhydride Download PDFInfo
- Publication number
- CN204676019U CN204676019U CN201520340612.5U CN201520340612U CN204676019U CN 204676019 U CN204676019 U CN 204676019U CN 201520340612 U CN201520340612 U CN 201520340612U CN 204676019 U CN204676019 U CN 204676019U
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- communicated
- liquid
- pump unit
- kettle
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
The utility model discloses a kind of solvent treatment system of pyromellitic acid anhydride, comprising: reactor, strainer, crystallization kettle, whizzer, dryer, filtrate tank, still kettle and liquid-ring vacuum pump unit.The liquid-ring vacuum pump unit adopted includes condenser, circulation fluid hold-up vessel, and circulation fluid is recyclable reusable solvent, so the heat that the solvent vapour be drawn out of and pump running produce is by being absorbed completely after condenser condenses, neither loses circulation fluid and do not make again solvent vapour leak; Reach the not only energy-conservation but also object reduced discharging.
Description
Technical field
The utility model relates to pyromellitic acid anhydride field of refinement, particularly relates to a kind of solvent treatment system of pyromellitic acid anhydride.
Background technology
Aromatic polyimide film has superelevation thermotolerance, resistance to acids and bases, excellent mechanical property, electrical property and dimensional stability feature, is thus widely used in high-technology fields such as very high Aeronautics and Astronautics, microelectronics and the nuclear power of reliability requirement.Pyromellitic acid anhydride, as one of important raw and processed materials of producing aromatic polyimide film, along with the widespread use to aromatic polyimide film, there has also been more, higher requirement to its quality; Pyromellitic acid anhydride is as one of the important raw and processed materials of aromatic polyimide film, also more, higher to its requirement.
The process for purification of pyromellitic acid anhydride mainly contains Decompression Sublimation method, hot gas flow carries method, directly separation and purification method, recrystallization method, solvent wash method, form adduct process and serialization dehydration method for refining; Decompression Sublimation method, hot gas flow carry method, directly separation and purification method energy consumption is higher, and recrystallization method, solvent wash method, formation adduct process and serialization dehydration method for refining product purity are lower.
For this reason, my company passes through the continuous Improvement of more than ten years, finally determines a kind of pyromellitic acid anhydride process for purification.This technological process utilizes a kind of mixed solvent to be dissolved completely by crude product pyromellitic acid anhydride, then decolour, several step such as filtering and impurity removing, crystallisation by cooling and drying realizes.But existing system cannot play the effect of this technique completely when carrying out this technique, and can cause certain energy and the waste of material, therefore need a kind of not only save energy but also the solvent treatment system of the pyromellitic acid anhydride of emissions reduction badly.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of solvent treatment system of pyromellitic acid anhydride, can realize energy-saving and emission-reduction.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: the solvent treatment system providing a kind of pyromellitic acid anhydride, comprising: reactor, strainer, crystallization kettle, whizzer, dryer, filtrate tank, still kettle and liquid-ring vacuum pump unit;
Described reactor, comprise kettle and be positioned at charging opening, drain, bleeding point and the discharge port on kettle, described drain is positioned at the upper end of described reactor, and be communicated with exhausting pipeline, described exhausting pipeline at least comprises the first emptying small transfer line that a section is vertically positioned at drain upper end, and described first emptying small transfer line is provided with the first condenser;
The import of described strainer is communicated with the discharge port of described reactor, the outlet of described strainer and the inlet communication of described crystallization kettle;
The outlet of described crystallization kettle and the inlet communication of described whizzer, the bleeding point of described crystallization kettle is communicated with by vacuum lead with described liquid-ring vacuum pump unit, described vacuum lead at least comprises one section and is vertically positioned at first of the bleeding point upper end of described crystallization kettle and vacuumizes small transfer line, and described first vacuumizes on small transfer line and be provided with the second condenser;
Described whizzer comprises solids exit mouth and liquid outlet opening, and described liquid outlet opening is communicated with the opening for feed of described filtrate tank;
The bleeding point of described dryer is communicated with described liquid-ring vacuum pump unit;
The discharge port of described filtrate tank is communicated with the opening for feed of described reactor with the opening for feed of described still kettle respectively, and the bleeding point of described filtrate tank is communicated with described liquid-ring vacuum pump unit;
The bleeding point of described still kettle is communicated with described liquid-ring vacuum pump unit;
Described liquid-ring vacuum pump unit, comprise surge tank group, vacuum pump group and circulation flow container, described surge tank group is communicated with described vacuum pump group, the equipment that described surge tank group need vacuumize with outside is communicated with, described vacuum pump group is communicated with drain pipe circulation by liquid-inlet pipe with described circulation flow container, described liquid-inlet pipe is provided with the 3rd condenser; The drain of described circulation flow container is communicated with described exhausting pipeline, and described exhausting pipeline at least comprises the second emptying small transfer line that a section is vertically positioned at drain upper end, and described second emptying small transfer line is provided with the 4th condenser.
In the utility model preferred embodiment, described dryer is connected by material cycling mode with whizzer.
In the utility model preferred embodiment, described strainer is the superfine foreign body filter with heating unit.
In the utility model preferred embodiment, the circulation fluid of described liquid-ring vacuum pump unit is solvent.
The beneficial effects of the utility model are: the solvent treatment system of the utility model pyromellitic acid anhydride, the liquid-ring vacuum pump unit adopted includes condenser, circulation fluid hold-up vessel, and circulation fluid recyclablely reuses solvent, so the heat that the solvent vapour be drawn out of and pump running produce is by being absorbed completely after condenser condenses, neither loses circulation fluid and do not make again solvent vapour leak; Reach the not only energy-conservation but also object reduced discharging.
Accompanying drawing explanation
Fig. 1 is the structural representation of solvent treatment system one preferred embodiment of the utility model pyromellitic acid anhydride.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection domain of the present utility model.
Refer to Fig. 1, the utility model embodiment comprises:
A solvent treatment system for pyromellitic acid anhydride, comprising: reactor 1, strainer 2, crystallization kettle 3, whizzer 4, dryer 5, filtrate tank 6, still kettle 7 and liquid-ring vacuum pump unit 8;
Described reactor 1, comprise kettle and be positioned at charging opening, drain, bleeding point and the discharge port on kettle, described drain is positioned at the upper end of described reactor 1, and be communicated with exhausting pipeline, described exhausting pipeline at least comprises the first emptying small transfer line that a section is vertically positioned at drain upper end, and described first emptying small transfer line is provided with the first condenser 91;
The import of described strainer 2 is communicated with the discharge port of described reactor 1, the outlet of described strainer 2 and the inlet communication of described crystallization kettle 3;
The outlet of described crystallization kettle 3 and the inlet communication of described whizzer 4, the bleeding point of described crystallization kettle 3 is communicated with by vacuum lead with described liquid-ring vacuum pump unit 8, described vacuum lead at least comprises one section and is vertically positioned at first of the bleeding point upper end of described crystallization kettle 3 and vacuumizes small transfer line, and described first vacuumizes on small transfer line and be provided with the second condenser 92;
Described whizzer 4 comprises solids exit mouth and liquid outlet opening, and described liquid outlet opening is communicated with the opening for feed of described filtrate tank 6; The solids exit mouth of described whizzer 4 is connected with the opening for feed of described dryer 5; Particularly, described dryer 5 is connected by material cycling mode with whizzer 4; Such as, the solid materials of whizzer 4 discharging is transferred to dryer 5 by materials vehicle;
The bleeding point of described dryer 5 is communicated with described liquid-ring vacuum pump unit 8;
The discharge port of described filtrate tank 6 is communicated with the opening for feed of described reactor 1 with the opening for feed of described still kettle 7 respectively, and the bleeding point of described filtrate tank is communicated with described liquid-ring vacuum pump unit 8;
The bleeding point of described still kettle 7 is communicated with 8 groups, described liquid-ring vacuum pump machine;
Described liquid-ring vacuum pump unit 8, comprise surge tank group 81, vacuum pump group 82 and circulation flow container 83, described surge tank group 81 is communicated with described vacuum pump group 82, the equipment that described surge tank group 81 need vacuumize with outside is communicated with, described vacuum pump group 82 is communicated with drain pipe circulation by liquid-inlet pipe with described circulation flow container 83, described liquid-inlet pipe is provided with the 3rd condenser 93; The drain of described circulation flow container 83 is communicated with described exhausting pipeline, and described exhausting pipeline at least comprises the second emptying small transfer line that a section is vertically positioned at drain upper end, and described second emptying small transfer line is provided with the 4th condenser 94.
The working process of the solvent treatment system of the utility model pyromellitic acid anhydride is as follows:
A) react: in reactor 1, add raw material, solvent and discoloring agent, and stirring of heating is reacted; Described raw material is crude product pyromellitic acid anhydride, its mass percentage content >=90%, and described solvent is acetic anhydride, its concentration >=80%, and described discoloring agent is gac;
B) filter: reacted solution enters strainer 2 and filters, remove discoloring agent gac, mechanical impurity and foreign matter, strainer adopts ultra-fine foreign material filter, and the structure of this strainer, filter type are negative pressure heat filtering, and negative pressure is from liquid-ring vacuum pump unit 8;
C) crystallization: the solution after filtration to crystallization kettle 3, crystallization while stirring in still, crystallization outlet temperature is 30 ± 5 DEG C;
D) be separated: solid crystal is adopt whizzer 4 suction filtration with being separated of mother liquor, and negative pressure is from liquid-ring vacuum pump unit 8; Mother liquor after centrifugal suction filtration enters filtrate tank 6 and deposits, and enters reactor recycle according to need of production;
E) dry: the solid crystal containing a small amount of mother liquor after centrifugal suction filtration is dried, oven dry is dry under negative pressure with bipyramid dryer, and negative pressure is from liquid-ring vacuum pump unit 8;
F) distill: the solvent color after use is deepened gradually, adopts the mode of vacuum distillation to carry out recycling by still kettle 7, distillation negative pressure is from liquid-ring vacuum pump unit 8.
Vacuum pump common in chemical industry can simply be divided into variable displacement vacuum pump and ejector vacuum pump, variable displacement vacuum pump utilizes the mechanical periodicity of pump chamber to complete the device of air-breathing and exhaust, and reciprocating pump, sliding vane rotary vacuum pump, sliding valve vacuum pump, water ring vacuum pump, Roots vaccum pump belong to variable displacement vacuum pump exactly.Ejector vacuum pump is a kind of kinetic vacuum pump that the high-speed jet utilizing the Pressure Drop of Venturi effect to produce delivers gas to outlet, and water-jet pump, steam jet vacuum pump, gas-water cascade ejector vacuum pump, carbonated drink combined jet vacuum pump belong to ejector vacuum pump.
Water-ring vacuum pump is mounted on rotating with mutliblade eccentric rotor in pump case, and water throwing is formed the water ring concentric with pump case to pump case, and water ring and spinner blade define volume mechanical periodicity thus sucked by gas, compress and discharge.When its advantage is rough vacuum rate of air sucked in required large, can the direct condensable gases such as pump up water steam.Its shortcoming is low vacuum; Can not aspirate with granular medium; Rotor high-speed rotates the rotproofing that is not easy to do, and therefore can not aspirate and have corrosive medium.
But the solvent that we use is not only soluble in water but also have corrodibility, absorbs a large amount of solvent when using water-jet pump in recirculated water, the process of waste water is quite bothered; Therefore, we have employed liquid-ring vacuum pump unit.Power is that the liquid-ring vacuum pump unit maximum rate of air sucked in required per hour of 22KW can reach 800m
3, the required vacuum such as suction filtration, product drying, solvent distillation, mass transport of filtering and impurity removing in production process, solid-liquid separation can be met, and the water-jet pump of 5.5KW rate of air sucked in required per hour only 125m
3, the demand of whole process can not be met; Because liquid-ring vacuum pump unit has condenser, circulation fluid hold-up vessel, and circulation fluid is recyclable reusable solvent, so the heat that the solvent vapour be drawn out of and pump running produce is by being absorbed completely after condenser condenses, neither loses circulation fluid and do not make again solvent vapour leak; Reach the not only energy-conservation but also object reduced discharging.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification sheets and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (4)
1. a solvent treatment system for pyromellitic acid anhydride, is characterized in that, comprising: reactor, strainer, crystallization kettle, whizzer, dryer, filtrate tank, still kettle and liquid-ring vacuum pump unit;
Described reactor, comprise kettle and be positioned at charging opening, drain, bleeding point and the discharge port on kettle, described drain is positioned at the upper end of described reactor, and be communicated with exhausting pipeline, described exhausting pipeline at least comprises the first emptying small transfer line that a section is vertically positioned at drain upper end, and described first emptying small transfer line is provided with the first condenser;
The import of described strainer is communicated with the discharge port of described reactor, the outlet of described strainer and the inlet communication of described crystallization kettle;
The outlet of described crystallization kettle and the inlet communication of described whizzer, the bleeding point of described crystallization kettle is communicated with by vacuum lead with described liquid-ring vacuum pump unit, described vacuum lead at least comprises one section and is vertically positioned at first of the bleeding point upper end of described crystallization kettle and vacuumizes small transfer line, and described first vacuumizes on small transfer line and be provided with the second condenser;
Described whizzer comprises solids exit mouth and liquid outlet opening, and described liquid outlet opening is communicated with the opening for feed of described filtrate tank;
The bleeding point of described dryer is communicated with described liquid-ring vacuum pump unit;
The discharge port of described filtrate tank is communicated with the opening for feed of described reactor with the opening for feed of described still kettle respectively, and the bleeding point of described filtrate tank is communicated with described liquid-ring vacuum pump unit;
The bleeding point of described still kettle is communicated with described liquid-ring vacuum pump unit;
Described liquid-ring vacuum pump unit, comprise surge tank group, vacuum pump group and circulation flow container, described surge tank group is communicated with described vacuum pump group, the equipment that described surge tank group need vacuumize with outside is communicated with, described vacuum pump group is communicated with drain pipe circulation by liquid-inlet pipe with described circulation flow container, described liquid-inlet pipe is provided with the 3rd condenser; The drain of described circulation flow container is communicated with described exhausting pipeline, and described exhausting pipeline at least comprises the second emptying small transfer line that a section is vertically positioned at drain upper end, and described second emptying small transfer line is provided with the 4th condenser.
2. the solvent treatment system of pyromellitic acid anhydride according to claim 1, is characterized in that, described dryer is connected by material cycling mode with whizzer.
3. the solvent treatment system of pyromellitic acid anhydride according to claim 1, is characterized in that, described strainer is the superfine foreign body filter with heating unit.
4. the solvent treatment system of pyromellitic acid anhydride according to claim 1, is characterized in that, the circulation fluid of described liquid-ring vacuum pump unit is solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340612.5U CN204676019U (en) | 2015-05-25 | 2015-05-25 | A kind of solvent treatment system of pyromellitic acid anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340612.5U CN204676019U (en) | 2015-05-25 | 2015-05-25 | A kind of solvent treatment system of pyromellitic acid anhydride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204676019U true CN204676019U (en) | 2015-09-30 |
Family
ID=54175726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520340612.5U Expired - Fee Related CN204676019U (en) | 2015-05-25 | 2015-05-25 | A kind of solvent treatment system of pyromellitic acid anhydride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204676019U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107862974A (en) * | 2017-11-22 | 2018-03-30 | 河南莱帕克化工设备制造有限公司 | Benzamide production line instructional device |
| CN110698433A (en) * | 2019-11-25 | 2020-01-17 | 怀化市恒渝新材料有限公司 | Method and equipment for purifying photoinitiator |
-
2015
- 2015-05-25 CN CN201520340612.5U patent/CN204676019U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107862974A (en) * | 2017-11-22 | 2018-03-30 | 河南莱帕克化工设备制造有限公司 | Benzamide production line instructional device |
| CN107862974B (en) * | 2017-11-22 | 2023-11-24 | 河南莱帕克化工设备制造有限公司 | Benzamide production line teaching device |
| CN110698433A (en) * | 2019-11-25 | 2020-01-17 | 怀化市恒渝新材料有限公司 | Method and equipment for purifying photoinitiator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211462268U (en) | Vacuum suction filtration integrated device | |
| CN106986490B (en) | Process and device for recycling and treating industrial production wastewater of carboxylic ester | |
| CN113443977A (en) | Sulfur and chlorine removal process in 2-ethyl anthraquinone production | |
| CN103787542B (en) | The wastewater recovery processing technique that a kind of Preparation of Sebacic Acid From Castor Oil produces and device | |
| CN103253819B (en) | Production technology for treating ternary-monomer wastewater and extracting sodium sulfate | |
| CN204676019U (en) | A kind of solvent treatment system of pyromellitic acid anhydride | |
| CN115722154A (en) | Crotonic acid production system and technology | |
| CN220546960U (en) | Epoxy separation and purification device | |
| CN203754551U (en) | Device for recycling and treating waste water produced during preparation of decanedioic acid by utilizing castor oil | |
| CN203763913U (en) | Degasser | |
| CN102443122B (en) | Production method for refining polyetheretherketone | |
| CN104892621A (en) | Energy-saving emission-reduction process for producing pyromellitic dianhydride in solvent refining method | |
| CN208995416U (en) | A kind of tetrabromobisphenol A process units | |
| CN114436293B (en) | Method for directly producing sodium bromide from low-concentration brine | |
| CN217578335U (en) | Nanometer calcium carbonate production system | |
| CN213643133U (en) | A concentrator for traditional chinese medicine draws | |
| CN101372347A (en) | Salt drainage and caustification process as well as caustification system for aluminum oxide production by Bayer process | |
| CN208829472U (en) | A kind of processing heavy metal wastewater thereby device | |
| CN104892406A (en) | Industrialized preparation method of 2-carboxyl-3-naphthalene formic acid | |
| CN221106983U (en) | Sodium carbonate nitrogen gas drying system | |
| CN212017649U (en) | Furan resin apparatus for producing | |
| CN113620320B (en) | Process for preparing high-purity lithium carbonate by adopting continuous carbonization method | |
| CN221015202U (en) | Tail gas treatment device of polyvinyl alcohol dryer | |
| CN203922752U (en) | A kind of device that removes ammonium sulfate and calcium carbonate mixture slurry free ammonia | |
| CN219792515U (en) | Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20200525 |