CN110452411B - Control method and control device for rubber desulfurization - Google Patents
Control method and control device for rubber desulfurization Download PDFInfo
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- CN110452411B CN110452411B CN201910733488.1A CN201910733488A CN110452411B CN 110452411 B CN110452411 B CN 110452411B CN 201910733488 A CN201910733488 A CN 201910733488A CN 110452411 B CN110452411 B CN 110452411B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2319/00—Characterised by the use of rubbers not provided for in groups C08J2307/00 - C08J2317/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention provides a control method and a control device for rubber desulfurization, because the viscosity of waste rubber powder is continuously increased in the stirring and heating processes of the rubber powder, in order to maintain the constant rotating speed of the stirring shaft, the output current of the motor is continuously increased under the condition that the voltage is not changed, therefore, the viscosity of the waste rubber powder is in positive correlation with the current value output by the motor, the current value output by the corresponding motor can be set according to the viscosity value of the desulfurized rubber to be discharged, whether the waste rubber powder reaches the required viscosity is judged by detecting whether the current value output by the motor reaches a preset value, compared with the traditional method in which the automatic discharging mode is realized by setting the heating temperature and the heating time, the method has the advantages that the viscosity error of the desulfurized rubber obtained in different batches is greatly reduced, the error is always controlled to be 0.5-4.5%, and the quality stability of the regenerated rubber is greatly improved.
Description
Technical Field
The invention relates to the technical field of rubber processing, in particular to a control method and a control device for rubber desulfurization.
Background
The desulfurization of the waste rubber powder is an important step in the production process of the regenerated rubber, and the desulfurization of the 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 conventional waste rubber desulfurization process, the control conditions of the discharge are generally temperature and time, namely, the rubber is discharged after being stirred and reacted in a desulfurization device at a certain temperature for a preset time, but the quality of the discharged desulfurized rubber is not stable in the control mode of the discharge, and the Mooney value error of the discharged desulfurized rubber of different batches reaches 10-20%.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided are a method and a device for controlling the discharge of a desulfurized rubber from a reclaimed rubber, which can significantly improve the stability of the quality of the discharged desulfurized rubber.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a control method for rubber desulfurization, which comprises the following steps:
step 1: putting the waste rubber powder into a stirring type desulfurization tank with a constant stirring shaft rotating speed, heating and stirring to desulfurize the waste rubber powder;
step 2: through obtaining the current value of the motor that is connected in drive digester (mixing) shaft, judge whether the viscosity of rubber reaches anticipated viscosity, if, then the digester stops heating and stirring to the ejection of compact obtains the devulcanized rubber.
The invention also relates to a control device for rubber desulfurization, which comprises a desulfurization tank, a stirring shaft, a heating device, a speed reducer, a driving motor, a current monitoring device and a controller;
the stirring shaft penetrates through the stirring tank, the stirring shaft is in transmission connection with a driving motor through a speed reducer, and the current monitoring device is electrically connected with the driving motor;
the current monitoring device is a device capable of monitoring the current of the driving motor;
the controller is respectively and electrically connected with the heating device, the driving motor and the current monitoring device.
The invention has the beneficial effects that: in the control method for rubber desulfurization provided by the invention, as the viscosity of the waste rubber powder is continuously increased in the stirring and heating processes of the rubber powder, in order to maintain the constant rotating speed of the stirring shaft, the output current of the motor is continuously increased under the condition that the voltage is not changed, therefore, the viscosity of the waste rubber powder is in positive correlation with the current value output by the motor, the current value output by the corresponding motor can be set according to the viscosity value of the desulfurized rubber to be discharged, whether the waste rubber powder reaches the required viscosity is judged by detecting whether the current value output by the motor reaches a preset value, compared with the traditional method in which the automatic discharging mode is realized by setting the heating temperature and the heating time, the method has the advantages that the viscosity error of the desulfurized rubber obtained in different batches is greatly reduced, the error is always controlled to be 0.5-4.5%, and the quality stability of the regenerated rubber is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a control device for rubber devulcanization according to an embodiment of the present invention;
description of reference numerals:
1. a devulcanizer; 2. a stirring shaft; 3. a speed reducer; 4. a drive motor; 5. a current monitoring device; 6. and a controller.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: whether the waste rubber powder reaches the required viscosity is judged by detecting whether the current value output by the motor reaches a preset value, so that the machine is controlled to stop and discharge.
Referring to fig. 1, the present invention relates to a method for controlling rubber desulfurization, comprising the following steps:
step 1: waste rubber powder is put into a stirring type desulfurizing tank 1 with a stirring shaft 2 with constant rotating speed and is heated and stirred, so that the waste rubber powder is desulfurized;
step 2: through obtaining the current value of the motor that is connected in drive digester 1 (mixing) shaft 2, judge whether the viscosity of rubber reaches anticipated viscosity, if, then digester 1 stops heating and stirring to the ejection of compact, obtain the devulcanized rubber.
In the control method for rubber desulfurization, the viscosity of the waste rubber powder is continuously increased in the stirring and heating processes of the rubber powder, in order to maintain the stirring shaft 2 at a constant rotating speed, the output current of the motor is increased under the condition of constant voltage, so the viscosity of the waste rubber powder is in positive correlation with the current value output by the motor, the current value output by the corresponding motor can be set according to the viscosity value of the desulfurized rubber to be discharged, whether the waste rubber powder reaches the required viscosity is judged by detecting whether the current value output by the motor reaches a preset value, compared with the traditional method in which the automatic discharging mode is realized by setting the heating temperature and the heating time, the method has the advantages that the viscosity error of the desulfurized rubber obtained in different batches is greatly reduced, the error is always controlled to be 0.5-4.5%, and the quality stability of the regenerated rubber is greatly improved.
Further, in the above method for controlling rubber devulcanization, the step 2 specifically comprises: the current value of the motor is obtained through a current sensor electrically connected with the motor, the motor current value obtained through a PLC receiving frequency converter is used for judging whether the motor current value reaches a preset value, if so, the PLC controls the motor shaft to stop rotating, and meanwhile, the PLC controls a heating device to stop heating the desulfurizing tank 1 and control discharging to obtain the desulfurized rubber.
According to the above description, a user can perform a preliminary experiment before determining conditions to determine the relationship between the output current value of the motor and the viscosity of the rubber, so as to determine the current value of the motor corresponding to the required viscosity, preset the current value on the PLC, and control the motor to stop rotating when the current sensor monitors that the output current value of the motor reaches a preset value, the heating device stops heating the devulcanizer 1, and controls discharging.
Further, in the above method for controlling rubber devulcanization, the step 2 specifically comprises: the current value of the motor is obtained through a frequency converter electrically connected with the motor, the motor current value obtained through the frequency converter is received by the PLC, whether the motor current value reaches a preset value or not is judged, if yes, the PLC controls the motor shaft to stop rotating, meanwhile, the PLC controls the heating device to stop heating the desulfurizing tank 1, and controls the gate valve at the discharge hole of the desulfurizing tank 1 to be opened, so that rubber is discharged, and the desulfurized rubber is obtained.
According to the description, the output current value of the motor can be directly obtained through the frequency converter, an ammeter does not need to be additionally installed, the gate valve is installed at the discharge port, the gate valve, the heating device, the motor and the frequency converter are all electrically connected with the PLC, and the automatic control of the device can be realized by programming a PLC program.
The invention also relates to a control device for rubber desulfurization, which comprises a desulfurization tank 1, a stirring shaft 2, a heating device, a speed reducer 3, a driving motor 4, a current monitoring device 5 and a controller 6;
the stirring shaft 2 penetrates through the stirring tank, the stirring shaft 2 is in transmission connection with a driving motor 4 through a speed reducer 3, and the current monitoring device 5 is electrically connected with the driving motor 4;
the current monitoring device 5 is a device capable of monitoring the current of the driving motor 4;
the controller 6 is electrically connected with the heating device, the driving motor 4 and the current monitoring device 5 respectively.
Further, in the above rubber desulfurization control device structure, the current monitoring device 5 is a current sensor or a frequency converter.
Further, in the above rubber desulfurization control device structure, the stirring shaft 2 is arranged in the vertical direction.
Further, in the above rubber desulfurization control device structure, the controller 6 is a PLC.
Further, in the above-mentioned rubber desulfurization's controlling means structure, still include the valve, the valve setting is at the discharge gate of digester 1, the valve is connected with controller 6 electricity.
Further, in the structure of the control device for rubber desulfurization, the valve is a gate valve.
Further, in the above rubber desulfurization control device structure, a temperature sensor is arranged in the devulcanizer 1, and the temperature sensor is electrically connected with the controller 6.
Example 1
A control method for rubber desulfurization comprises the following steps:
step 1: waste rubber powder is put into a stirring type desulfurizing tank 1 with a stirring shaft 2 with constant rotating speed and is heated and stirred, so that the waste rubber powder is desulfurized;
step 2: the current value of the motor is obtained through a current sensor electrically connected with the motor, the motor current value obtained through a PLC receiving frequency converter is used for judging whether the motor current value reaches a preset value, if so, the PLC controls the motor shaft to stop rotating, and meanwhile, the PLC controls a heating device to stop heating the desulfurizing tank 1 and control discharging to obtain the desulfurized rubber.
Example 2
A control method for rubber desulfurization comprises the following steps:
step 1: waste rubber powder is put into a stirring type desulfurizing tank 1 with a stirring shaft 2 with constant rotating speed and is heated and stirred, so that the waste rubber powder is desulfurized;
step 2: the current value of the motor is obtained through a frequency converter electrically connected with the motor, the motor current value obtained through the frequency converter is received by the PLC, whether the motor current value reaches a preset value or not is judged, if yes, the PLC controls the motor shaft to stop rotating, meanwhile, the PLC controls the heating device to stop heating the desulfurizing tank 1, and controls the gate valve at the discharge hole of the desulfurizing tank 1 to be opened, so that rubber is discharged, and the desulfurized rubber is obtained.
Example 3
A control device for rubber desulfurization comprises a desulfurization tank 1, a stirring shaft 2, a heating device, a speed reducer 3, a driving motor 4, a current monitoring device 5 and a controller 6; the stirring shaft 2 penetrates through the stirring tank, the stirring shaft 2 is in transmission connection with a driving motor 4 through a speed reducer 3, and the current monitoring device 5 is electrically connected with the driving motor 4; the current monitoring device 5 is a current sensor; the controller 6 is electrically connected with the heating device, the driving motor 4 and the current monitoring device 5 respectively. The stirring shaft 2 is arranged in the vertical direction. The controller 6 is a PLC. Still include the valve, the valve setting is at the discharge gate of digester 1, the valve is connected with 6 electricity in the controller. The valve is a gate valve. And a temperature sensor is arranged in the desulfurizing tank 1 and is electrically connected with the controller 6.
Example 4
A control device for rubber devulcanization as set forth in embodiment 3, wherein said current monitoring device 5 is a frequency converter.
Example 5
By adopting the control method for rubber desulfurization in the embodiment 2 and the control device for rubber desulfurization in the embodiment 4, when no material is added into the devulcanizer 1, the stirring shaft 2 is driven to rotate by the motor, and at the moment, the current output by the motor is obtained by the frequency converter to be 19A;
putting 40kg of waste rubber powder into a desulfurizing tank 1, putting corresponding ingredients into the desulfurizing tank 1, sealing the desulfurizing tank 1, heating the interior of the desulfurizing tank 1 by a PLC (programmable logic controller) control heating device, keeping the temperature in the desulfurizing tank 1 constant at a preset temperature by a temperature sensor, controlling a driving motor 4 to drive a stirring shaft 2 to stir the waste rubber powder by the PLC, and setting the working frequency of the driving motor 4 to be 37Hz by a frequency converter so that the rotating speed of the stirring shaft 2 is constant at 152 r/min;
if the discharging viscosity is required to be 40 Mooney, the output current value of the motor corresponds to 28A;
if the discharging viscosity is required to be 60 Mooney, the output current value of the motor corresponds to 27A;
the error between the actual viscosity value and the expected viscosity value of the materials obtained from different batches is always controlled to be 0.5-4.5%.
In conclusion, in the control method for rubber desulfurization provided by the invention, as the viscosity of the waste rubber powder is continuously increased in the processes of stirring and heating the rubber powder, in order to maintain the constant rotating speed of the stirring shaft, the output current of the motor is continuously increased under the condition that the voltage is not changed, therefore, the viscosity of the waste rubber powder is in positive correlation with the current value output by the motor, the current value output by the corresponding motor can be set according to the viscosity value of the desulfurized rubber to be discharged, whether the waste rubber powder reaches the required viscosity is judged by detecting whether the current value output by the motor reaches a preset value, compared with the traditional method in which the automatic discharging mode is realized by setting the heating temperature and the heating time, the method has the advantages that the viscosity error of the desulfurized rubber obtained in different batches is greatly reduced, the error is always controlled to be 0.5-4.5%, and the quality stability of the regenerated rubber is greatly improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (4)
1. A control method for rubber desulfurization is characterized by comprising the following steps:
step 1: putting the waste rubber powder into a stirring type desulfurization tank with a constant stirring shaft rotating speed, heating and stirring to desulfurize the waste rubber powder;
step 2: the current value of the motor is obtained through a current sensor electrically connected with the motor, the motor current value obtained through a PLC receiving frequency converter is used for judging whether the motor current value reaches a preset value, if so, the PLC controls the motor shaft to stop rotating, and meanwhile, the PLC controls a heating device to stop heating the devulcanizer and control discharging to obtain the devulcanized rubber.
2. A control method for rubber desulfurization is characterized by comprising the following steps:
step 1: putting the waste rubber powder into a stirring type desulfurization tank with a constant stirring shaft rotating speed, heating and stirring to desulfurize the waste rubber powder;
step 2: the current value of the motor is obtained through the frequency converter electrically connected with the motor, the motor current value obtained through the frequency converter is received through the PLC, whether the motor current value reaches a preset value or not is judged, if yes, the PLC controls the motor shaft to stop rotating, meanwhile, the PLC controls the heating device to stop heating the devulcanizer, and controls the gate valve at the discharge hole of the devulcanizer to be opened, so that rubber is discharged, and the devulcanized rubber is obtained.
3. A control device based on the control method of rubber devulcanization according to any one of claims 1 to 2, comprising a devulcanization tank, a stirring shaft, a heating device, a speed reducer, a driving motor, a current monitoring device and a controller;
the stirring shaft penetrates through the stirring tank, the stirring shaft is in transmission connection with a driving motor through a speed reducer, and the current monitoring device is electrically connected with the driving motor;
the current monitoring device is a device capable of monitoring the current of the driving motor;
the controller is electrically connected with the heating device, the driving motor and the current monitoring device respectively, and is a PLC;
the current monitoring device is a current sensor or a frequency converter.
4. The apparatus for controlling desulfurization of rubber according to claim 3, wherein said stirring shaft is disposed in a vertical direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733488.1A CN110452411B (en) | 2019-08-09 | 2019-08-09 | Control method and control device for rubber desulfurization |
| PCT/CN2020/071127 WO2021027248A1 (en) | 2019-08-09 | 2020-01-09 | Method for controlling desulfurization and discharge of reclaimed rubber and control device therefor |
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| CN201910733488.1A CN110452411B (en) | 2019-08-09 | 2019-08-09 | Control method and control device for rubber desulfurization |
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| CN110452411B true CN110452411B (en) | 2021-07-20 |
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| WO2021027248A1 (en) * | 2019-08-09 | 2021-02-18 | 福建省邵武市恒晖橡胶再生有限公司 | Method for controlling desulfurization and discharge of reclaimed rubber and control device therefor |
| CN112337189B (en) * | 2020-10-19 | 2021-11-19 | 浙江华基环保科技有限公司 | Garbage incineration flue gas dedusting filter material and processing method thereof |
| CN113025360B (en) * | 2021-02-25 | 2021-10-22 | 广西交科集团有限公司 | Method and device for controlling viscosity of rubber asphalt based on current change |
| CN114161597A (en) * | 2021-11-02 | 2022-03-11 | 镇江泰舸电池隔膜科技有限公司 | Quantitative determination method for high-speed mixing of PE (polyethylene) partition plates |
| CN115253871B (en) * | 2022-07-14 | 2024-02-23 | 古茗科技集团有限公司 | Automatic stirring device and control method thereof |
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| CN1561363A (en) * | 2001-10-03 | 2005-01-05 | 美国橡胶技术公司 | Recycled rubber processing and performance enhancement |
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| US4146508A (en) * | 1975-05-29 | 1979-03-27 | U.S. Rubber Reclaiming Co., Inc. | Process of reclaiming rubber and refining reclaimed rubber |
| US5883140A (en) * | 1993-12-06 | 1999-03-16 | National Rubber L.L.C. | Process for regeneration of rubber |
| US6224796B1 (en) * | 1998-08-19 | 2001-05-01 | CENTRE DE RECHERCHE INDUSTRIELLE DU QUéBEC | Process for producing batches of rubber-based composition |
| US7250451B2 (en) * | 2004-03-09 | 2007-07-31 | American Rubber Technologies, Inc. | Recycled rubber processing and performance enhancement |
| KR101303710B1 (en) * | 2010-12-20 | 2013-09-03 | 한국타이어 주식회사 | Method for mixing rubber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1561363A (en) * | 2001-10-03 | 2005-01-05 | 美国橡胶技术公司 | Recycled rubber processing and performance enhancement |
| CN103231466A (en) * | 2013-05-07 | 2013-08-07 | 寿宁县信达特种橡胶有限公司 | Novel automatic production system for electromagnetic single-spiral turbine plasticizer |
| CN107043473A (en) * | 2017-06-19 | 2017-08-15 | 四川乐山亚联机械有限责任公司 | A kind of reclaimed rubber desulfurization at normal-pressure system |
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