CN211886808U - Kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride - Google Patents
Kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride Download PDFInfo
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- CN211886808U CN211886808U CN202020120991.8U CN202020120991U CN211886808U CN 211886808 U CN211886808 U CN 211886808U CN 202020120991 U CN202020120991 U CN 202020120991U CN 211886808 U CN211886808 U CN 211886808U
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Abstract
The utility model belongs to the technical field of chemical industry equipment, a synthetic cauldron formula reation kettle for tetrahydrophthalic anhydride is related to, specifically disclose a take four layers of agitating unit and aeration ring's reation kettle for tetrahydrophthalic anhydride is synthetic. The reaction kettle comprises a reaction kettle body and a kettle cover, wherein a stirrer is arranged in the reaction kettle body, and the reaction kettle is characterized in that a plurality of layers of stirring paddles are longitudinally fixed along a stirring shaft of the stirrer, an axial flow paddle is arranged in the middle of the stirring shaft, and an open type self-absorption combined paddle is arranged at the upper part and the lower part of the stirring shaft; the upper end of the stirring shaft is connected with the magnetic stirrer supporting base through a shell clamping coupler, and the lower end of the stirring shaft is connected with the lower end socket through a bottom supporting shaft sleeve; an aeration ring is arranged in the kettle body. The utility model can fully and uniformly mix the gas and liquid raw materials and accelerate the reaction speed; the aeration ring can increase the contact area of gas-liquid reaction and improve the reaction conversion rate; the heat exchange mode of external heating and internal cooling and the temperature control mode of the lower two sections of the kettle in the kettle can realize reasonable temperature control of the reaction, avoid the generation of a large amount of polymers caused by excessive heat release, thereby improving the product quality and being beneficial to industrialized continuous production.
Description
Technical Field
The utility model belongs to the technical field of chemical industry equipment, concretely relates to take four layers of agitating unit and aeration ring's tetrahydrophthalic anhydride synthetic cauldron formula reactor of using.
Background
Tetrahydrophthalic anhydride is one of the downstream products of maleic anhydride. It is a novel organic acid anhydride epoxy resin curing agent with excellent performance, is used for alkyd resin and unsaturated resin, and can improve the adhesive force, elasticity, gloss and water resistance of the coating. As a plasticizer, the PVC can improve the cold resistance and heat resistance of PVC and is nontoxic. The method is widely applied to the fields of electronic and electrical industry and aerospace. Meanwhile, the product is also a raw material for synthesizing a surfactant and a medicinal and agricultural product. Tetrahydrophthalic anhydride is generally synthesized by the addition of maleic anhydride and butadiene, so the reaction apparatus is a core unit.
The traditional synthesis method is carried out in a kettle type reaction kettle by adopting a liquid melting gas bubbling method, wherein the reaction kettle is usually composed of a stirring rod and a heating sleeve, excessive gas butadiene is required to be introduced in the use process to avoid incomplete reaction, the excessive butadiene is difficult to recover and add due to the characteristic of easy polymerization and is usually directly discharged into an incinerator for incineration, the calorific value is high, and the incinerator is correspondingly required to resist high temperature. In addition, the gas bubbling method easily causes uneven gas flow, excessive heat release quantity of a reaction liquid part or too fast ventilation, and when cooling water is not smooth, local temperature rise is easily caused too fast, butadiene is polymerized, the color of a tetrahydrophthalic anhydride product is too dark, or the consistency of batches is poor. Therefore, the research and development of a special synthesis device for tetrahydrophthalic anhydride is an urgent need for technical improvement at present.
SUMMERY OF THE UTILITY MODEL
To the problems existing in the prior art, the utility model aims to provide a tetrahydrophthalic anhydride synthesis reaction kettle with uniform gas-liquid mixing, high reaction efficiency and reasonable temperature control.
The reaction kettle for synthesizing tetrahydrophthalic anhydride comprises a reaction kettle body and a kettle cover, wherein a stirrer is arranged in the reaction kettle body, and is characterized in that a plurality of layers of stirring paddles are longitudinally fixed along a stirring shaft of the stirrer, an axial flow paddle is arranged in the middle of the stirring shaft, and an open type self-absorption combined paddle is arranged at the upper part and the lower part of the stirring shaft; the upper end of the stirring shaft is connected with the magnetic stirrer supporting base through a clamping shell coupler, and the lower end of the stirring shaft is connected with the lower seal head through a bottom supporting shaft sleeve. The multilayer stirring paddles are uniformly arranged according to the height of the kettle body, and generally 4-6 layers are selected, and four layers are preferred.
The internal aeration ring that is equipped with of cauldron, aeration ring include ring section and straight tube section, and the ascending return bend of ring section passes through the clamp with straight tube section and is connected, and straight tube section is for dismantling the loose axle, with the straight tube section sealing connection of kettle cover upper band flange, and aeration ring bottom holds in the palm in cauldron bottom sprag board, opens the bleeder vent on the ring.
The reaction kettle for synthesizing tetrahydrophthalic anhydride is characterized in that a heating jacket is arranged outside the kettle body of the reaction kettle, and a cooling coil is arranged in the kettle body.
The reaction kettle for synthesizing tetrahydrophthalic anhydride is characterized in that thermometers are respectively arranged at the bottom of the reaction kettle body and in the reaction kettle.
The utility model discloses the advantage: according to the characteristics of the tetrahydrophthalic anhydride synthesis raw material, a plurality of layers of stirring paddles are longitudinally fixed along a stirring shaft of the stirrer, so that gas and liquid can be fully and uniformly mixed by full-mixing stirring in the reaction process, and the reaction speed is accelerated; the aeration ring can increase the contact area of gas-liquid reaction and improve the reaction conversion rate; the heat exchange mode of external heating and internal cooling and the temperature control mode of the lower two sections of the kettle in the kettle can realize reasonable temperature control of the reaction, avoid the generation of a large amount of polymers caused by excessive heat release, thereby improving the product quality and being beneficial to industrialized continuous production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a reaction kettle body, 2-a kettle cover, 3-a cooling coil support column, 4-a stirring shaft, 5-an axial flow paddle, 6-an open type self-priming combined paddle, 7-a jacketed coupler, 8-a magnetic stirrer base, 9-a bottom support shaft sleeve, 10-an annular section of an aeration ring, 11-a ventilation straight pipe of the aeration ring, 12-a detachable movable shaft, 13-a flanged straight pipe section, 14-a straight pipe section hoop, 15-a support plate, 16-an aeration ring hoop, 17-a heating jacket, 18-an internal cooling coil, 19-a kettle thermometer and 20-a kettle bottom thermometer.
Detailed Description
The invention will be further explained with reference to the drawings attached to the description, but the scope of protection of the invention is not limited thereto:
as shown in fig. 1, the reaction kettle for synthesizing tetrahydrophthalic anhydride of the present invention comprises a reaction kettle body 1 and a kettle cover 2, wherein a stirrer is arranged in the kettle body, four layers of stirring paddles are longitudinally fixed along a stirring shaft 4 of the stirrer, a high-efficiency axial flow paddle 5 is arranged in the middle of the kettle body, an open type self-priming combined paddle is arranged at the upper part of the high-efficiency axial flow paddle 5, and two open type self-priming combined paddles 6 are arranged at the lower part of the high-efficiency axial flow paddle 5; the upper end of the stirring shaft 4 is connected with a magnetic stirrer supporting base 8 through a clamping shell coupler 7, and the lower end of the stirring shaft is connected with a lower end socket through a bottom supporting shaft sleeve 9, so that the gas-liquid mixing effect can be improved, and the reaction is more thorough. The bottom still is equipped with the aeration ring in the cauldron body, and it includes ring section 10 and straight tube section 11, and the ascending return bend of ring section passes through clamp 14 to be connected with straight tube section 11, and straight tube section can design for dismantling loose axle 12, with the straight tube section 13 sealing connection of the kettle cover upper band flange. The circular ring sections 10 of the aeration ring are connected by a hoop 16, the bottom of the circular ring is supported on a kettle bottom supporting plate 15, and the aeration ring is provided with air holes. The reactor body of the reaction kettle is externally provided with a heating jacket 17, and the reactor body is internally provided with a cooling coil 18. The reaction kettle body is internally provided with a kettle thermometer 19 and a kettle bottom thermometer 20 respectively.
When tetrahydrophthalic anhydride is produced, the gas phase is directly communicated to the bottom of the reaction kettle through the aeration ring and flows out upwards through the air holes, the liquid phase is added from the feeding port at the upper part of the reaction kettle, and the gas phase and the liquid phase are fully mixed through the multilayer stirring paddle, so that the contact area of gas and liquid is increased, and the reaction speed is higher. The reaction temperature in the kettle is regulated and controlled by adopting the form of an external heating jacket and an internal cooling coil pipe and arranging thermometers at the middle part and the bottom of the kettle for testing, so that the accuracy of reaction temperature control is improved, the reaction heat is dispersed, and the generation of polymers is reduced.
The utility model discloses also be applicable to the solid three-phase reaction of gas-liquid of difficult misce bene.
Claims (1)
1. A kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride comprises a reaction kettle body and a kettle cover, wherein a stirrer is arranged in the reaction kettle body, and is characterized in that a plurality of layers of stirring paddles are longitudinally fixed along a stirring shaft of the stirrer, an axial flow paddle is arranged in the middle of the reaction kettle, and an open type self-absorption combined paddle is arranged at the upper part and the lower part of the reaction kettle respectively; the upper end of the stirring shaft is connected with the magnetic stirrer supporting base through a shell clamping coupler, and the lower end of the stirring shaft is connected with the lower end socket through a bottom supporting shaft sleeve; the multilayer stirring paddles are uniformly arranged according to the height of the kettle body, and 4-6 layers are selected;
an aeration ring is arranged in the kettle body, the aeration ring comprises a circular ring section and a straight pipe section, an ascending bent pipe of the circular ring section is connected with the straight pipe section in a clamping manner, the straight pipe section is a detachable movable shaft and is in sealing connection with the straight pipe section with a flange on the kettle cover, the bottom of the aeration ring is supported on a kettle bottom support plate, and air holes are formed in the ring;
a heating jacket is arranged outside the kettle body of the reaction kettle, and a cooling coil is arranged in the kettle body;
thermometers are respectively arranged at the bottom of the reaction kettle body and in the kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020120991.8U CN211886808U (en) | 2020-01-19 | 2020-01-19 | Kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020120991.8U CN211886808U (en) | 2020-01-19 | 2020-01-19 | Kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride |
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| CN211886808U true CN211886808U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020120991.8U Active CN211886808U (en) | 2020-01-19 | 2020-01-19 | Kettle type reaction kettle for synthesizing tetrahydrophthalic anhydride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973613A (en) * | 2021-02-10 | 2021-06-18 | 中国科学院过程工程研究所 | Continuous gas-liquid reaction system device and preparation method for continuously synthesizing tetrahydrophthalic anhydride by adopting same |
| CN113117627A (en) * | 2021-04-15 | 2021-07-16 | 濮阳市盛源能源科技股份有限公司 | Tetrahydrophthalic anhydride apparatus for producing |
-
2020
- 2020-01-19 CN CN202020120991.8U patent/CN211886808U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973613A (en) * | 2021-02-10 | 2021-06-18 | 中国科学院过程工程研究所 | Continuous gas-liquid reaction system device and preparation method for continuously synthesizing tetrahydrophthalic anhydride by adopting same |
| CN113117627A (en) * | 2021-04-15 | 2021-07-16 | 濮阳市盛源能源科技股份有限公司 | Tetrahydrophthalic anhydride apparatus for producing |
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