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A desulfurization and discharge control method and control device for recycled rubber

A technology of reclaimed rubber and control device, applied in the field of rubber processing, can solve the problems of unstable quality of desulfurized rubber and Mooney value error of desulfurized rubber, and achieve the effect of improving quality stability and reducing viscosity error

Active Publication Date: 2021-03-30
湖北明睿环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The desulfurization of waste rubber powder is an important step in the production process of regenerated rubber. The desulfurization of waste rubber is mainly to add and stir the waste rubber, and properly introduce air to break the sulfur bond of the waste rubber; in the traditional waste rubber desulfurization process , the control conditions for the discharge are usually temperature and time, that is, the rubber is discharged after being stirred and reacted for a predetermined time at a certain temperature in the desulfurization device, but the quality of the desulfurized rubber discharged by the above-mentioned discharge control method is not stable, different batches The Mooney value error of the discharged devulcanized rubber reaches 10-20%

Method used

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  • A desulfurization and discharge control method and control device for recycled rubber

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Experimental program
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Effect test

Embodiment 1

[0032] A method for controlling desulfurization and discharge of recycled rubber, comprising the following steps:

[0033] Step 1, putting the waste rubber powder into the stirring type desulfurization tank 1 with a constant rotating speed of the stirring shaft 2, heating and stirring, so as to desulfurize the waste rubber powder;

[0034] Step 2, obtain the torque value of the motor through the torque sensor 5 connected to the motor shaft, receive the motor torque value obtained by the torque sensor 5 through the PLC, and judge whether the motor torque value reaches the preset value, if so, the PLC controls the motor shaft to stop rotating, Simultaneously, the PLC controls the heating device to stop heating, and controls the flapper valve at the discharge port of the desulfurization tank 1 to open to discharge the rubber to obtain desulfurized rubber.

Embodiment 2

[0036] A desulfurization discharge control device for recycled rubber, comprising a desulfurization tank 1, a stirring shaft 2, a heating device, a reducer 3, a drive motor 4, a torque sensor 5, a gate valve and a PLC;

[0037] The stirring shaft 2 is installed in the stirring tank, the stirring shaft 2 is parallel to the vertical direction, the stirring shaft 2 is connected to the driving motor 4 through the reducer 3, and the torque sensor 5 is connected to the motor and the reducer 3 Between, the gate valve is arranged at the discharge port of the desulfurization tank 1; the PLC is electrically connected with the gate valve, the driving motor 4, the temperature sensor and the torque sensor 5 respectively. The desulfurization tank 1 is provided with a temperature sensor, and the temperature sensor is electrically connected with the controller 6 .

Embodiment 3

[0039] Adopt the desulfurization discharging control device of the regenerated rubber of embodiment 2, and adopt the desulfurization discharging control method of the regenerated rubber of embodiment 1;

[0040] When no material is added to the desulfurization tank 1, the motor drives the stirring shaft 2 to rotate, and the measured output torque of the motor is 453.63Nm at this time;

[0041] Put 40kg of waste rubber powder into the desulfurization tank 1 and put in the corresponding ingredients, close the desulfurization tank 1, heat the inside of the desulfurization tank 1 through the PLC control heating device, and keep the temperature inside the desulfurization tank 1 constant at the preset temperature through the temperature sensor. The driving motor 4 is controlled by the PLC to drive the stirring shaft 2 to stir the waste rubber powder, and the operating frequency of the driving motor 4 is set to 37 Hz by the frequency converter, so that the rotating speed of the stirri...

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Abstract

The invention relates to a control method and a control device for desulfurization and discharge of recycled rubber. Since the viscosity of waste rubber powder is positively correlated with the torque output by the motor, the corresponding motor can be set according to the viscosity value of the desulfurized rubber to be discharged. The output torque is determined by monitoring whether the output torque value of the motor reaches the preset value to determine whether the waste rubber powder has reached the required viscosity, so as to control the shutdown of the motor and the heating device and discharge the material, compared with the traditional method through By setting the heating temperature and processing time to realize automatic discharge, the viscosity error of devulcanized rubber obtained from different batches is greatly reduced, and the error is always controlled at 0.5‑1%, which greatly improves the quality stability of recycled rubber.

Description

technical field [0001] The invention relates to the technical field of rubber processing, in particular to a method for controlling desulfurization and discharge of reclaimed rubber and a control device thereof. Background technique [0002] The desulfurization of waste rubber powder is an important step in the production process of recycled rubber. The desulfurization of waste rubber is mainly to add and stir the waste rubber, and properly introduce air to break the sulfur bond of the waste rubber; in the traditional waste rubber desulfurization process , the control conditions for the discharge are usually temperature and time, that is, the rubber is discharged after being stirred and reacted for a predetermined time at a certain temperature in the desulfurization device, but the quality of the desulfurized rubber discharged by the above-mentioned discharge control method is not stable, different batches The Mooney value error of the discharged devulcanized rubber reaches ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/10C08L19/00
CPCC08J11/10C08J2319/00Y02W30/62
Inventor 梁云标
Owner 湖北明睿环保科技有限公司