JP2516506Y2 - Heating reactor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a heating reactor equipped with a heating jacket by a heating medium vapor around the outer periphery of a reactor, when the reactants need to be cooled during or after the reaction. The present invention relates to a heating reaction device that can be rapidly cooled.

[0002]

2. Description of the Related Art Conventionally, as a reaction apparatus for producing a thermoplastic polymer such as polyester, a heating reaction apparatus in which a heating jacket for heating medium vapor is provided on the outer periphery of a reactor has been widely used.

However, in such a reactor,
When the reaction product needs to be cooled because the temperature of the reaction product becomes too high during the reaction or the temperature of the reaction product is kept low after completion of the reaction, the reaction product cannot be cooled promptly. was there.

The inventors of the present invention, as an apparatus for improving such a drawback, cool a heat medium liquid through a cooler and make it circulate by showering in a heating jacket in the upper part of the reactor. We first proposed a device equipped with a liquid circulation device (Japanese Patent Application No. 2-8538). However, in the device, depending on the type of reactants, the gas phase portion of the inner wall of the reactor is cooled, so low-polymerization products, etc. adhere, solidify, grow, peel off and fall into the reaction products, There was a problem of degrading quality.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a heating system capable of rapidly cooling a reaction product when it is necessary to cool the reaction product and producing a reaction product of stable quality with high production efficiency. It is intended to provide a reactor.

[0006]

The present invention is to solve the above-mentioned problems, and the gist thereof is to cool a heating medium liquid in a heating reactor in which a heating jacket for heating medium vapor is provided on the outer periphery of a reactor. The heating and reaction apparatus is characterized in that a heat transfer medium circulation device is provided which is cooled through a reactor and is made to circulate by flowing down from an overflow cell provided in a heating jacket on the side wall of the reactor.

FIG. 1 is a schematic explanatory view showing an example of the device of the present invention. 1 is a reactor, 2 is a heating jacket by heat medium vapor, 3 is a heat medium liquid part, 41 and 42 are heaters, 5 is a heat medium liquid circulation pipe, 6 is a pump, 7 is a cooler, 81 and 82 are heat medium Shows liquid overflow box.

During a normal reaction, the heating medium liquid is not circulated, the heating medium liquid 3 is heated by the heaters 41 and 42 to generate steam, and the heating medium steam is sent to the heating jacket 2 to heat the reactants. To do.

If the reactants need to be cooled in order to keep the temperature of the reactants too high during the reaction or to keep the temperature of the reactants low after completion of the reaction, a heater is used.
While turning off 41 and 42, the heat medium liquid is extracted by the pump 6,
The heat medium liquid cooled by the cooler 7 and cooled from the overflow cells 81, 82 provided on the side surface cylinder of the outer wall of the reactor 1 is caused to flow down along the outer wall of the reactor to cool the reactor (reactant). To do.

In the conventional reaction apparatus having no heat transfer medium circulation device, when cooling the reactants, the heaters 41 and 42 must be turned off and indirect heat transfer by heat radiation from the outer wall of the jacket must be used, resulting in extremely high cooling efficiency. It was bad.

On the other hand, according to the apparatus of the present invention, when the reaction product is cooled, the cooled heat transfer liquid is caused to flow down along the outer wall of the reactor, so that the reactor is directly cooled and effective transfer is achieved. The heat area becomes large, and the reaction product can be cooled quickly.

It should be noted that one or more overflow cells may be provided to receive the heat transfer medium flowing down from the overflow cells 81 and 82.

[0013]

EXAMPLE The reactor shown in FIG. 1 (reactor capacity 4.5 m
Charge 2000 kg of triethylene glycol to the reactor of ³ ),
After heating to 280 ° C, heating was stopped, the heat transfer liquid was cooled to a temperature 20 ° C lower than the internal temperature, and the heat transfer liquid was circulated at a flow rate of 20 m ³ / hr. The time required to lower the temperature of the reactor to 150 ° C was 4 hours.

On the other hand, when a similar experiment was conducted without circulating the heat transfer liquid, the time required to lower the temperature of triethylene glycol to 150 ° C. was 48 hours.

[0015]

According to the present invention, in a heating reactor having a heating jacket provided with a heating medium vapor around the outer periphery of the reactor, the reactant can be cooled rapidly when it is necessary to cool it. Provided is a heating reaction device capable of producing a reaction product of stable quality with high production efficiency without inclusion of foreign matter in a product.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an example of an apparatus of the present invention.

[Explanation of symbols]

 1 Reactor 2 Heating jacket with heat medium vapor 3 Heat medium liquid part 41 Heater 42 Heater 5 Heat medium liquid circulation piping 6 Pump 7 Cooler 81 Heat medium liquid overflow container 82 Heat medium liquid overflow container

Claims (1)

(57) [Scope of utility model registration request] 1. In a heating reactor in which a heating jacket for heating medium vapor is provided on the outer periphery of a reactor, the heating medium liquid is cooled through a cooler and flows down from an overflow box provided in the heating jacket on the side wall of the reactor. A heating reaction device, characterized in that a heating medium liquid circulating device is provided so as to circulate.