A catalytic rectification unit for upgrading pyrolysis oil from waste tires

By integrating catalytic reforming and fractionation functions into a catalytic distillation unit, the problem of poor stability of pyrolysis oil is solved, achieving efficient reforming and convenient catalyst replacement, reducing system complexity and investment, and improving the quality of pyrolysis oil and system availability.

CN116532050BActive Publication Date: 2026-06-26HANGZHOU BOILER GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU BOILER GRP CO LTD
Filing Date
2023-03-22
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing tire pyrolysis processes, pyrolysis oil has poor stability, low calorific value, and high olefin content. The lack of effective catalytic modification methods limits its application scenarios. In addition, adding catalytic modification and fractionation units increases system complexity and investment. Furthermore, catalysts are prone to carbon deposition in olefin-rich environments, resulting in poor system availability.

Method used

A catalytic distillation unit is designed to integrate catalytic reforming and fractionation functions. It adopts a three-stage reflux temperature control, incorporates online catalyst replacement technology, and utilizes a metal hollow spherical shell and spherical catalyst modules for gas-solid catalytic reactions. The gas-liquid heat and mass transfer is optimized by combining the tray and packing structure to avoid catalyst carbon buildup.

Benefits of technology

This technology enables efficient upgrading of pyrolysis oil, reduces equipment investment and system complexity, ensures convenient online catalyst replacement, and improves system availability and the quality of pyrolysis oil.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a catalytic rectification unit for tire pyrolysis oil modification, which comprises a catalytic rectification tower, a tower bottom reflux pump, a tower bottom reflux cooler, a middle section reflux pump, a middle section reflux heat exchanger, a stripping tower, a diesel pump, a diesel cooler, a catalyst hopper, a catalyst discharge pipe, a catalyst cooler, a gas-rich separator, a booster fan, a tower top reflux cooler, an oil-gas separator, a tower top reflux pump and a three-way valve. The application improves the quality of pyrolysis oil, provides a solution for high investment and high complexity of the system caused by the separation of the cooling unit, the fractionation unit and the catalytic modification unit, and improves the system availability by coupling the online catalyst replacement technology.
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