CN204644245U - A kind of reactive system for unsaturated polyester resin - Google Patents

Abstract

The utility model relates to a reaction system for unsaturated polyester resin, which comprises a reaction kettle and an alkyd recovery device. One side of the reaction kettle is provided with a sampling pipe, and an observation hole and an inert gas pipe are arranged on the top of the reaction kettle; the alkyd recovery unit includes an acid recovery tower, an alcohol recovery tower, a horizontal condenser and a water tank, and the acid recovery tower and The inlets of the alcohol recovery towers are all connected to the gas outlet at the top of the reaction kettle, the acid recovery tower and the alcohol recovery tower are arranged in parallel, and the tops of the acid recovery tower and the alcohol recovery tower are respectively connected in series with a vertical condenser, two vertical The outlet of the condenser is connected in parallel with the inlet of the horizontal condenser, and the outlet of the horizontal condenser is connected with the water tank. The utility model is equipped with a coil pipe and a stirrer, so that the production cycle is controlled, the temperature of the reactants is uniform, the acid recovery tower and the alcohol recovery tower can completely recover and separate the acid and alcohol, the product yield is improved, and the environmental pollution is reduced.

Description

A kind of reaction system for unsaturated polyester resin

technical field

The utility model relates to a reaction system for unsaturated polyester resin, which belongs to the field of reaction devices for unsaturated polyester resin.

Background technique

Unsaturated polyester resin is generally a linear polymer compound with ester bonds and unsaturated double bonds formed by polycondensation of unsaturated dibasic acid saturated diols or saturated dibasic acid unsaturated diols. Usually, the polycondensation reaction of unsaturated polyester resin is carried out at 190-220°C until the expected acid value (or viscosity) is reached. After the polycondensation reaction of unsaturated polyester resin is completed, a certain amount of vinyl monomer is added while it is hot. into a viscous liquid.

The reaction kettle is the key equipment in the polycondensation reaction process of unsaturated polyester resin. The general reaction kettle is heated by pinch tube. When the volume of the kettle increases, the ratio of the surface area of the kettle to increase is smaller than the ratio of the volume increase, so for the unit volume , the effective heating or cooling area becomes smaller, making the production cycle longer and difficult to control.

In addition, the water generated in the reaction process is heated to form water vapor, which is discharged from the top of the reactor. The water vapor will be mixed with more alcohol and acid. The existing technology is to directly connect the fractionation column to the top of the reactor, and the top of the fractionation column is connected to the vertical condenser in turn. The water vapor is separated through the separation of the fractionation column, and the alcohol and acid are reused. However, the separation effect is poor when a single fractionation column is used, and part of the alcohol and acid is still lost, thereby reducing the unsaturated polyester. Resin yield, and increase the difficulty of subsequent wastewater treatment.

Utility model content

The utility model provides a reaction system for unsaturated polyester resin aiming at the deficiencies in the above-mentioned prior art.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: a reaction system for unsaturated polyester resin, which is special in that it includes a reaction kettle and an alkyd recovery device, the side wall of the reaction kettle is a jacket, A coil pipe and an agitator are arranged in the reaction kettle, a sampling pipe is arranged on one side of the reaction kettle, an observation hole and an inert gas pipe are arranged on the top of the reaction kettle; the alkyd recovery device includes an acid recovery tower, an alcohol recovery tower , a horizontal condenser and a water tank, the inlets of the acid recovery tower and the alcohol recovery tower are all connected to the gas outlet at the top of the reactor, the acid recovery tower and the alcohol recovery tower are arranged in parallel, the acid recovery tower and the alcohol recovery tower A vertical condenser is connected in series at the top of the two vertical condensers, and the outlets of the two vertical condensers are connected in parallel to the inlets of the horizontal condensers, and the outlets of the horizontal condensers are connected to the water tank.

The beneficial effects of the utility model are: the utility model is equipped with a coil in the reactor, so that the production cycle is controlled, and the agitator provided in the reactor is on the center line of the reactor, so that the materials can be mixed evenly, and the whole reaction The temperature of the material is uniform, which prevents local overheating. The observation hole can be used for workers to enter the pot to check the corrosion of the pot wall and the integrity of the internal equipment. There are multiple sampling tubes on the pot, so that samples can be taken regularly to determine the reaction. Degree, improve production efficiency and economic benefits. The acid recovery tower and the alcohol recovery tower installed in parallel are separated by the alcohol recovery tower in the early stage of the reaction and separated by the acid recovery tower in the later stage of the reaction. The recovery and separation of acid and alcohol is relatively thorough, and the product yield is increased by 1-2%. It is easy to handle and will not pollute the environment.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the agitator is connected under the coil.

Further, the coil is made of stainless steel pipe, installed in a spiral shape on the inner wall of the reaction kettle, and extends upward from the bottom of the reaction kettle.

The beneficial effect of adopting the above further scheme is that better heat exchange is achieved between the reactant and the heat medium, and this structure improves the working efficiency.

Further, the agitator is propeller type.

The beneficial effect of adopting the above-mentioned further scheme is that the materials can be mixed evenly, the temperature of the whole reactant is uniform, local overheating is prevented, and various reactants are in good contact with each other, the water is discharged quickly, the reaction is accelerated, and the work efficiency is improved.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure, 1. Reactor; 2. Jacket; 3. Coil; 4. Stirrer; 5. Sampling tube; 6. Observation hole; 7. Inert gas tube; 8. Acid recovery tower; 9. Alcohol recovery tower ; 10, horizontal condenser; 11, water tank.

Detailed ways

The principles and features of the present utility model are described below in conjunction with examples, which are only used to explain the utility model, and are not used to limit the scope of the utility model.

A reaction system for unsaturated polyester resin, which is special in that it includes a reaction kettle 1 and an alkyd recovery device, the side wall of the reaction kettle 1 is a jacket 2, and the reaction kettle 1 is provided with a coil 3 and agitator 4, a sampling tube 5 is provided on one side of the reactor 1, and an observation hole 6 and an inert gas pipe 7 are arranged on the top of the reactor 1; the alkyd recovery unit includes an acid recovery tower 8, an alcohol recovery tower 9. Horizontal condenser 10 and water tank 11, the inlets of the acid recovery tower 8 and the alcohol recovery tower 9 are all connected to the gas outlet at the top of the reactor 1, the acid recovery tower 8 and the alcohol recovery tower 9 are arranged in parallel, the The tops of the acid recovery tower 8 and the alcohol recovery tower 9 are respectively connected in series with a vertical condenser, and the outlets of the two vertical condensers are connected in parallel with the inlet of the horizontal condenser 10, and the outlet of the horizontal condenser 10 is connected with the horizontal condenser 10. Sink 11 links to each other.

The stirrer 4 is connected under the coil 3 .

Said coil pipe 3 is made of stainless steel pipe, which is spirally installed on the inner wall of the reaction kettle 1 and extends upward from the bottom of the reaction kettle 1 .

The agitator 4 is a propeller type.

In the early stage of the reaction, the main substance entrained in the water vapor in the reactor is alcohol, which is more thoroughly separated through the alcohol recovery tower; in the later stage of the reaction, the main substance entrained in the water vapor is acid, and the separation effect is better through the acid recovery tower.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. the reactive system for unsaturated polyester resin, it is characterized in that, comprise reactor and alcohol acid-restoring plant, described reactor sidewall is chuck, coil pipe and agitator is provided with in reactor, be provided with stopple coupon in the side of reactor, above reactor, be provided with vision slit and inert gas tube; Described alcohol acid-restoring plant comprises acid recovery tower, alcohol recovery tower, horizontal condenser and tank, described acid recovery tower is all connected with the air outlet on reactor top with the import of alcohol recovery tower, described acid recovery tower and alcohol recovery tower are arranged in parallel, the top of described acid recovery tower and alcohol recovery tower is in series with a vertical (type) condenser respectively, be connected with the entrance of horizontal condenser after the outlet parallel connection of two vertical (type) condensers, the outlet of described horizontal condenser is connected with tank.

2. reactive system according to claim 1, is characterized in that, described agitator is connected under described coil pipe.

3. reactive system according to claim 1, is characterized in that, described coil pipe stainless steel tube is made, and is arranged on reactor inwall in the shape of a spiral, upwards extends by Polycondensation Reactor and Esterification Reactor.

4. reactive system according to claim 1, is characterized in that, described agitator is propeller type.