CN-224221322-U - Polycarbonate polymerization tubular reaction device

CN224221322UCN 224221322 UCN224221322 UCN 224221322UCN-224221322-U

Abstract

The utility model provides a polycarbonate polymerization tubular reaction device, and belongs to the technical field of chemical industry. The utility model provides a polycarbonate polymerization reaction tubular reaction device which comprises a prepolymerization section reaction assembly, a polycondensation section reaction assembly and a final polymerization section reaction assembly, wherein a prepolymerization section spiral pipe piece is spirally wound on the outer side of a prepolymerization section cooling assembly and is provided with a prepolymerization section temperature sensor, a polycondensation section spiral pipe piece is spirally wound on the outer side of a polycondensation section cooling assembly and is provided with a polycondensation section temperature sensor, a final polymerization section spiral pipe piece is spirally wound on the outer side of a final polymerization section cooling assembly and is provided with a final polymerization section temperature sensor, and a prepolymerization section spiral pipe piece and reaction materials enter through the prepolymerization section spiral pipe piece and are discharged through the final polymerization section spiral pipe piece. According to the tubular reaction device for polycarbonate polymerization, provided by the utility model, in the reaction process, the temperature is fed back in real time, and the temperature is respectively reduced in different reaction stages, so that the differential temperature control requirements of the different reaction stages are met.

Inventors

LIU ZENG
MA MENGYING
LI YONGKUO
DU XIAOLING
ZHENG XIANCAI
LI PANPAN
MA HONGQING

Assignees

沧州大化股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (10)

1. A tubular polycarbonate polymerization reaction apparatus, comprising: The prepolymerization section reaction assembly comprises a prepolymerization section spiral pipe fitting and a prepolymerization section cooling assembly, wherein the prepolymerization section spiral pipe fitting is spirally wound on the outer side of the prepolymerization section cooling assembly, a prepolymerization section temperature sensor is arranged in the prepolymerization section spiral pipe fitting, and the prepolymerization section temperature sensor is connected to a PLC control system; the condensation polymerization section reaction assembly comprises a condensation polymerization section spiral pipe fitting and a condensation polymerization section cooling assembly, wherein the condensation polymerization section spiral pipe fitting is spirally wound on the outer side of the condensation polymerization section cooling assembly, a condensation polymerization section temperature sensor is arranged in the condensation polymerization section spiral pipe fitting and connected to a PLC control system, and The final polymerization section reaction assembly comprises a final polymerization section spiral pipe fitting and a final polymerization section cooling assembly, wherein the final polymerization section spiral pipe fitting is spirally wound on the outer side of the final polymerization section cooling assembly, a final polymerization section temperature sensor is arranged in the final polymerization section spiral pipe fitting, and the final polymerization section temperature sensor is connected to a PLC control system; The pre-polymerization section spiral pipe fitting the polycondensation section spiral pipe fitting the final polymerization section spiral pipe fitting is connected in sequence through a pipeline, the spiral directions of the pre-polymerization section spiral pipe fitting, the final polymerization section spiral pipe fitting and the final polymerization section spiral pipe fitting are consistent, and reaction materials enter through the left end of the pre-polymerization section spiral pipe fitting and are discharged through the right end of the final polymerization section spiral pipe fitting.
2. A tubular polycarbonate polymerization reaction apparatus as described in claim 1, wherein the pitch of the prepolymerization section screw pipe is smaller than the pitch of the polycondensation section screw pipe and smaller than the pitch of the final polymerization section screw pipe.
3. The tubular polycarbonate polymerization reaction apparatus of claim 1, wherein the pitch of the polycondensation pipe is a divergent pitch and the pitch of the final polycondensation pipe is a divergent pitch.
4. The tubular reactor for polycarbonate polymerization as described in claim 1, wherein a plurality of sets of guide vanes are provided in each of the prepolymerization section spiral pipe fitting, the polycondensation section spiral pipe fitting and the final polymerization section spiral pipe fitting.
5. A polycarbonate polymerization tubular reaction apparatus as described in claim 4, wherein said guide vanes are provided alternately along both sides of the inner wall of said prepolymerization section spiral pipe member/said polycondensation section spiral pipe member/said final polymerization section spiral pipe member.
6. The tubular reactor for polycarbonate polymerization according to claim 1, wherein a plurality of groups of static mixing plates are arranged in the spiral pipe of the polycondensation section, and the static mixing plates are used for improving the mixing uniformity of the reaction materials.
7. A tubular polycarbonate polymerization reaction apparatus as described in claim 6, wherein said static mixing plate is provided with a flow dividing hole.
8. The tubular reactor for polycarbonate polymerization reaction according to claim 1, wherein the prepolymerization section cooling assembly is internally provided with a prepolymerization section cooling pipe fitting which is a spiral pipe fitting.
9. A tubular polycarbonate polymerization reaction apparatus as described in claim 8, wherein the direction of the spiral of said prepolymerization section cooling pipe member is opposite to the direction of the spiral of said prepolymerization section spiral pipe member.
10. The tubular reactor for polycarbonate polymerization as described in claim 1, wherein a first sampling port is provided on a pipe between the prepolymerization section spiral pipe and the polycondensation section spiral pipe, and a second sampling port is provided on a pipe between the polycondensation section spiral pipe and the final polymerization section spiral pipe.

Description

Polycarbonate polymerization tubular reaction device Technical Field The utility model belongs to the technical field of chemical industry, and particularly relates to a polycarbonate polymerization tube type reaction device. Background Polycarbonate (PC) is a tough thermoplastic resin, and is a high-molecular polymer having a carbonate group in a molecular chain, and is classified into various types such as aliphatic, aromatic, aliphatic-aromatic, and the like, depending on the structure of the ester group. Due to the structural specificity of polycarbonate, the polycarbonate has become the most rapid-growing general engineering plastic of five engineering plastics. The polymerization reaction of the polycarbonate reaction materials is a strong exothermic process, a certain temperature is required to be maintained in a reactor in the reaction process, the temperature in the reactor is required to be accurately controlled, the reaction temperature is controlled in a proper interval, so that side reactions are avoided, the quality of products is ensured, and in order to realize temperature control, a PLC (programmable logic controller) control system is often used for receiving temperature data in real time and performing temperature control and adjustment. In the prior art, a reactor for polymerization reaction of polycarbonate is generally divided into a kettle type reactor and a tubular reactor, the tubular reactor can realize continuous production, but still has a certain problem, the traditional spiral tubular reactor adopts a cooling medium to carry out single countercurrent cooling, the mass transfer effect in a tube is poor, the heat transfer efficiency is insufficient, the different temperature control requirements of different reaction stages are difficult to cope with, the local overheating phenomenon is easy to occur, and the temperature fluctuation is easy to generate. Disclosure of utility model The utility model aims to provide a tubular reaction device for polycarbonate polymerization, which aims to solve the problem that the temperature control is not matched with the reaction stage due to insufficient heat transfer efficiency of a tubular reactor in the polycarbonate polymerization. In order to achieve the aim, the technical scheme adopted by the utility model is that the tubular reaction device for polycarbonate polymerization reaction comprises: The prepolymerization section reaction assembly comprises a prepolymerization section spiral pipe fitting and a prepolymerization section cooling assembly, wherein the prepolymerization section spiral pipe fitting is spirally wound on the outer side of the prepolymerization section cooling assembly, a prepolymerization section temperature sensor is arranged in the prepolymerization section spiral pipe fitting, and the prepolymerization section temperature sensor is connected to a PLC control system; the condensation polymerization section reaction assembly comprises a condensation polymerization section spiral pipe fitting and a condensation polymerization section cooling assembly, wherein the condensation polymerization section spiral pipe fitting is spirally wound on the outer side of the condensation polymerization section cooling assembly, a condensation polymerization section temperature sensor is arranged in the condensation polymerization section spiral pipe fitting and connected to a PLC control system, and The final polymerization section reaction assembly comprises a final polymerization section spiral pipe fitting and a final polymerization section cooling assembly, wherein the final polymerization section spiral pipe fitting is spirally wound on the outer side of the final polymerization section cooling assembly, a final polymerization section temperature sensor is arranged in the final polymerization section spiral pipe fitting, and the final polymerization section temperature sensor is connected to a PLC control system; The pre-polymerization section spiral pipe fitting the polycondensation section spiral pipe fitting the final polymerization section spiral pipe fitting is connected in sequence through a pipeline, the spiral directions of the pre-polymerization section spiral pipe fitting, the final polymerization section spiral pipe fitting and the final polymerization section spiral pipe fitting are consistent, and reaction materials enter through the left end of the pre-polymerization section spiral pipe fitting and are discharged through the right end of the final polymerization section spiral pipe fitting. In one possible implementation, the pitch of the pre-polymerization section helical tube is smaller than the pitch of the polycondensation section helical tube and smaller than the pitch of the final-polymerization section helical tube. In one possible implementation, the pitch of the polycondensation section spiral pipe is a diverging pitch, and the pitch of the final polycondensation section spiral pipe is a diverging pitch.