Research On The Technology And Equipment Of Double Helix Continuous Ptrolysis Of Waste Rubber And Plastic Materials

The double helix continuous pyrolysis equipment allows waste rubber and plastic particles to flow through different heating intervals under the continuous conveying effect,so that the materials can be continuously and quickly pyrolyzed,which can improve the pyrolysis efficiency and reduce energy consumption.This equipment is mainly used for solid waste treatment field.This subject takes waste rubber and plastic particles with a diameter of about 5mm as the research object,and takes process control and equipment optimization as the research purposes.From the research on the pyrolysis product yield and mechanism,to the intermittent pyrolysis process research,and finally to the double helix Pyrolysis reactor optimization and process parameter adjustment,combined with simulation and experiment,studied the pyrolysis process and pyrolysis gas movement process of waste rubber and plastic particles in batch and continuous reactors,and optimized the key structural parameters of the double spiral reactor.The other key components of continuous pyrolysis equipment are designed,and the prototype design is completed.The main contents are:(1)Through separate and mixed pyrolysis experiments of four typical waste rubber and plastic materials with a particle size of 5mm in a small reactor,the temperature and heating rate and other process parameters were studied to determine the yield and yield of pyrolysis products of waste rubber and plastic materials.With the influence of pyrolysis time,the best technological parameters were found under theoretical conditions,and the thermogravimetric analysis and kinetic analysis of the mixture were carried out.(2)Combining experiments and simulations,the effects of design parameters(agitating blade rotation speed,high-diameter ratio)and process parameters(temperature,filling ratio)on energy efficiency in batch reactors of different sizes were studied,and the pyrolysis efficiency was found.The highest reactor size,design parameters and process parameters.(3)Based on the discrete element method,the motion characteristics of waste rubber and plastic particles in the double-helical continuous reactor were studied using simulation methods,and the influence of key parameters such as screw pitch,rotation speed and filling rate on the material transportability and uniformity was analyzed.The basic parameters of the double spiral reactor were designed,and a control experiment was carried out on the experimental prototype.The effects of the length and temperature setting of the heating zone on the temperature field distribution in the reactor and the influence of the negative pressure of the exhaust port on the gas distribution in the reactor were studied by simulation.(4)Based on the previous research results,a double helix continuous reactor was further designed,the motor power of the reactor was calculated,the strength of the screw shaft was checked,a matching electromagnetic heating system and a condensation system were designed,and the electromagnetic The relevant parameters of heating and the theoretical condensation heat exchange area completed the design and manufacture of the engineering prototype,and verified the pyrolysis effect of waste rubber and plastic materials on the prototype.