CN111234308A - Rubber desulfurization method - Google Patents

Rubber desulfurization method Download PDF

Info

Publication number
CN111234308A
CN111234308A CN202010122085.6A CN202010122085A CN111234308A CN 111234308 A CN111234308 A CN 111234308A CN 202010122085 A CN202010122085 A CN 202010122085A CN 111234308 A CN111234308 A CN 111234308A
Authority
CN
China
Prior art keywords
rubber
desulfurization
waste rubber
desulfurizing
waste
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010122085.6A
Other languages
Chinese (zh)
Inventor
梁云标
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Mingrui Environmental Protection Technology Co ltd
Original Assignee
Fujian Shaowu Henghui Rubber Regeneration Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujian Shaowu Henghui Rubber Regeneration Co ltd filed Critical Fujian Shaowu Henghui Rubber Regeneration Co ltd
Publication of CN111234308A publication Critical patent/CN111234308A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C08J11/14—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 by treatment with steam or water
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The invention relates to the technical field of regenerated rubber production, in particular to a rubber desulfurization method; through the in-process that drops into heating and stirring in the stirring formula desulfurization jar at waste rubber powder, through when the waste rubber desulfurization, every 1-3min adds the clear water to the desulfurization jar in, make waste rubber powder obtain lasting moist, can effectively avoid waste rubber in the desulfurization process of stirring heating, the local condition of caking, scorching takes place to avoid waste rubber to produce poisonous flue gas because of the scorching, under the prerequisite that does not influence the performance of devulcanized rubber, it is the process environmental protection more of rubber desulfurization processing.

Description

Rubber desulfurization method
Technical Field
The invention relates to the technical field of regenerated rubber production, in particular to a rubber desulfurization method.
Background
The desulfurization of the waste rubber is an important step in the production process of the regenerated rubber, and the desulfurization of the waste rubber mainly comprises the steps of heating and stirring the waste rubber, and properly introducing air to break the sulfur bond of the waste rubber; in traditional waste rubber desulfurization process, because heating device in the digester can't reach the material and heat evenly completely, some rubber overheats easily and produces caking, scorching, not only influences the quality of reclaimed rubber, still can produce poisonous flue gas, the polluted environment.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a rubber desulfurization method for preventing the generation of agglomeration and scorching in the desulfurization process of waste rubber.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a rubber desulfurization method, which comprises the following steps:
step 1: putting waste rubber powder into a stirring type desulfurization tank, heating and stirring to desulfurize the waste rubber;
step 2: adding clean water into the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
The invention has the beneficial effects that: according to the rubber desulfurization method provided by the invention, when the waste rubber is desulfurized, clear water is added into the desulfurization tank every 1-3min, so that the waste rubber powder is continuously wetted, and the conditions of local caking and scorching of the waste rubber in the desulfurization process of stirring and heating can be effectively avoided, so that toxic smoke generated by scorching of the waste rubber is avoided, and the rubber desulfurization processing process is more environment-friendly on the premise of not influencing the performance of the desulfurized rubber.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The most key concept of the invention is as follows: clean water is added into the devulcanizer at intervals of 1-3min, so that the rubber keeps certain humidity and local caking and scorching are avoided.
The invention provides a rubber desulfurization method, which comprises the following steps:
step 1: putting waste rubber powder into a stirring type desulfurization tank, heating and stirring to desulfurize the waste rubber;
step 2: adding clean water into the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
According to the rubber desulfurization method, when the waste rubber is desulfurized, clear water is added into the desulfurization tank every 1-3min, so that the waste rubber powder is continuously wetted, the conditions of local caking and scorching of the waste rubber in the desulfurization process of stirring and heating can be effectively avoided, toxic smoke generated by the waste rubber due to scorching is avoided, and the rubber desulfurization processing process is more environment-friendly on the premise of not influencing the performance of the desulfurized rubber.
Further, the step 2 specifically comprises: adding clean water into the shaft part of the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
As can be seen from the above description, in the above rubber desulfurization method, in the process of putting the waste rubber powder into the stirring type desulfurization tank for heating and stirring, clean water is added to the shaft part of the desulfurization tank at intervals of 1-3min, since the clean water is added to the shaft part of the desulfurization tank, the temperature of the shaft part of the desulfurization tank is high, and in the rotating state, the clean water added to the shaft part is rapidly vaporized to form steam, and is uniformly dispersed into the desulfurization tank by the centrifugal action of the stirring shaft.
Further, the step 2 specifically comprises: and adding atomized clear water into the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
As can be seen from the above description, the cover body of the devulcanizer is provided with the water feeding pipe, the flow valve and the atomizer are arranged at the water feeding pipe, and the atomized water is fed into the devulcanizer to uniformly wet the rubber in the devulcanizer.
Furthermore, in the rubber desulfurization method, the weight ratio of the clean water added each time to the waste rubber powder put into the stirring type desulfurization tank is 2-7: 800.
As can be seen from the above description, the weight ratio of the amount of clean water added into the devulcanizer to the amount of waste rubber powder added into the devulcanizer each time needs to be maintained within the above range, if the amount of clean water added is too low, the purpose of preventing local rubber caking and scorching cannot be achieved, and if the amount of clean water added is too high, the overall performance of the devulcanized rubber is affected.
Furthermore, in the rubber desulfurization method, the weight ratio of the clean water added each time to the waste rubber powder put into the stirring type desulfurization tank is 1: 400.
Further, in the above rubber desulfurization method, in the step 1, the heating temperature set in the stirring-type desulfurization tank is 260-270 ℃.
Further, in the rubber desulfurization method, the input amount of the waste rubber powder in the step 1 is 40kg, and the addition amount of the clear water in the step 2 is 100-350 g.
Further, in the rubber desulfurization method, in the step 2, clean water is added to the devulcanizer every 2 min.
Further, in the rubber desulfurization method, in the step 2, the addition amount of clean water is 200 g.
Further, in the above rubber desulfurization method, the heating temperature set in the agitation type desulfurization tank is 265 ℃.
Example 1
A method of devulcanizing rubber comprising the steps of:
step 1: putting 40kg of waste rubber powder into a stirring type desulfurization tank, heating and stirring, wherein the heating set temperature is 265 ℃, and desulfurizing the waste rubber;
step 2: adding 250g of clear water into the shaft part of the devulcanizer every 2min until the waste rubber is devulcanized and discharged; and discharging when the viscosity of the waste rubber reaches the expected value to obtain the finished product of the desulfurized rubber.
Example 2
A method of devulcanizing rubber comprising the steps of:
step 1: putting 40kg of waste rubber powder into a stirring type desulfurization tank, heating and stirring, wherein the heating set temperature is 260 ℃, and desulfurizing the waste rubber;
step 2: adding 100g of atomized clear water into the devulcanizer every 1min until the waste rubber is devulcanized and discharged; and discharging when the viscosity of the waste rubber reaches the expected value to obtain the finished product of the desulfurized rubber.
Example 3
A method of devulcanizing rubber comprising the steps of:
step 1: putting 40kg of waste rubber powder into a stirring type desulfurization tank, heating and stirring, wherein the heating set temperature is 280 ℃, and desulfurizing the waste rubber;
step 2: adding 350g of clean water into the shaft part of the devulcanizer every 3min until the waste rubber is devulcanized and discharged; and discharging when the viscosity of the waste rubber reaches the expected value to obtain the finished product of the desulfurized rubber.
Using the above rubberAfter the rubber desulfurization method, the content of hydrogen sulfide and the content of non-methane total hydrocarbons are detected at the outlet of a desulfurization exhaust funnel of a rubber desulfurization tank by Xiamen environmental monitoring service company Limited, wherein the average value of the standard rod flow of the hydrogen sulfide is 67m3H, average value of emission concentration is 0.11mg/m3Average value of discharge rate was 7.37X 10-3kg/h, average benchmarking flow of non-methane total hydrocarbons 67m3H, average value of emission concentration of 7.75X 103mg/m3The average value of the discharge rate was 0.117kg/h, and both met the standard.
In conclusion, in the rubber desulfurization method provided by the invention, clear water is added into the desulfurization tank every 1-3min when the waste rubber is desulfurized, so that the waste rubber powder is continuously wetted, the conditions of local caking and scorching of the waste rubber in the desulfurization process of stirring and heating can be effectively avoided, toxic smoke generated by scorching of the waste rubber is avoided, and the rubber desulfurization processing process is more environment-friendly on the premise of not influencing the performance of the desulfurized rubber. Wherein, the mode of adding the clean water can be that the clean water is directly added into the shaft part of the desulfurizing tank, or the clean water is atomized and then the atomized water is added into the desulfurizing tank.
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 modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.

Claims (10)

1. A method for desulfurizing rubber, comprising the steps of:
step 1: putting waste rubber powder into a stirring type desulfurization tank, heating and stirring to desulfurize the waste rubber;
step 2: adding clean water into the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
2. The method for desulfurizing rubber according to claim 1, wherein said step 2 is specifically: adding clean water into the shaft part of the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
3. The method for desulfurizing rubber according to claim 1, wherein said step 2 is specifically: and adding atomized clear water into the devulcanizer every 1-3min until the waste rubber is devulcanized and discharged.
4. The method for desulfurizing rubber according to claim 1, wherein the weight ratio of the clean water to the waste rubber powder charged into the agitation type desulfurizing tank is 2-7: 800.
5. The method for desulfurizing rubber according to claim 1, wherein the weight ratio of the clean water to the waste rubber powder charged into the agitation type desulfurizing tank per one time is 1: 400.
6. The method for desulfurizing rubber according to claim 1, wherein the heating temperature set in the stirred desulfurization tank in step 1 is 260 ℃ to 270 ℃.
7. The method for desulfurizing rubber according to claim 1, wherein the amount of the waste rubber powder charged in the step 1 is 40kg, and the amount of the clear water charged in the step 2 is 100-350 g.
8. The method for desulfurizing rubber according to claim 1, wherein in the step 2, clean water is added to the desulfurizing tank every 2 min.
9. The method for desulfurizing rubber according to claim 7, wherein the amount of clean water added in step 2 is 200 g.
10. The method for desulfurizing rubber according to claim 1, wherein the heating temperature set in the agitation type desulfurization tank is 265 ℃.
CN202010122085.6A 2019-09-17 2020-02-27 Rubber desulfurization method Pending CN111234308A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910876507.6A CN110540675A (en) 2019-09-17 2019-09-17 Rubber desulfurization method
CN2019108765076 2019-09-17

Publications (1)

Publication Number Publication Date
CN111234308A true CN111234308A (en) 2020-06-05

Family

ID=68713747

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201910876507.6A Withdrawn CN110540675A (en) 2019-09-17 2019-09-17 Rubber desulfurization method
CN202010122085.6A Pending CN111234308A (en) 2019-09-17 2020-02-27 Rubber desulfurization method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201910876507.6A Withdrawn CN110540675A (en) 2019-09-17 2019-09-17 Rubber desulfurization method

Country Status (1)

Country Link
CN (2) CN110540675A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1103350A (en) * 1993-12-02 1995-06-07 梅州市梅江嘉应橡塑厂 Method for desulfuration regeneration of waste rubber
CN103819712A (en) * 2014-02-28 2014-05-28 海宁智盛橡胶科技有限公司 Preparation method of reclaimed rubber without activator addition during desulphurization process
US20150247020A1 (en) * 2012-09-12 2015-09-03 Sekhar Research Innovations Sdn. Bhd. Method for producing devulcanized rubber and an apparatus therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1103350A (en) * 1993-12-02 1995-06-07 梅州市梅江嘉应橡塑厂 Method for desulfuration regeneration of waste rubber
US20150247020A1 (en) * 2012-09-12 2015-09-03 Sekhar Research Innovations Sdn. Bhd. Method for producing devulcanized rubber and an apparatus therefor
CN103819712A (en) * 2014-02-28 2014-05-28 海宁智盛橡胶科技有限公司 Preparation method of reclaimed rubber without activator addition during desulphurization process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王允枭: ""防胶剂在橡胶配方中的应用研究"", 《中国优秀博硕士学位论文全文数据库（硕士）-工程科技I辑》 *

Also Published As

Publication number Publication date
CN110540675A (en) 2019-12-06

Similar Documents

Publication Publication Date Title
CN104773885A (en) Comprehensive treatment method of coking desulfurization waste liquid
CN110449002A (en) A kind of low concentration viscose fiber wastewater exhaust treatment system
KR100851948B1 (en) Apparatus and method for drying organic sludge
CN111234308A (en) Rubber desulfurization method
CN214781653U (en) Continuous biomass pyrolysis equipment
CN216779827U (en) Industrial waste salt pyrolysis system
US6311906B1 (en) Apparatus and method for recycling waste paint
CN204841399U (en) Desulfurization dust collector based on rotatory spray drying
CN108465339A (en) A kind of bitumen flue gas condensation cleaning processing unit
CN108043185A (en) A kind of processing system of waste gas containing VOC and the processing method realized using the system
CN208944079U (en) Organic silicon fibre retardant production is with taking off low device
JPH0947795A (en) Device for carbonizing and regenerating organic waste
CN214552517U (en) SDS dry desulfurization and SCR low temperature denitration device
CN102757164B (en) Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln
CN112454725A (en) Polyethylene gas removing device
CN205913967U (en) A waste gas recovery clean system for tyre reclaim production
CN111453970A (en) Sludge atomization molding device
CN107174930A (en) Rubber smell governing system
CN108912393A (en) A kind of preparation method of reclaimed rubber
CN104818076B (en) Compound desulphurization system and method before a kind of coal combustion
CN210506174U (en) Polypropylene powder purification device for ring tube method polypropylene process
CN104099152A (en) New technology for passivation refining of dried formed coal or semi coke of lignite
CN204058364U (en) A kind of damaged tire oil refining apparatus
CN208406437U (en) A kind of big flow flue gas precipitation and separation device
CN111892264A (en) Sludge co-combustion treatment device and treatment method without secondary exposure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20210722

Address after: 432500 east of new national highway 316, economic development zone, Yunmeng County, Xiaogan City, Hubei Province (in the hospital of Hubei Hairui environmental protection new material technology Co., Ltd.)

Applicant after: Hubei Mingrui Environmental Protection Technology Co.,Ltd.

Address before: 354001 No.19, shaikou Xinan Road, Shaowu City, Nanping City, Fujian Province

Applicant before: FUJIAN SHAOWU HENGHUI RUBBER RECYCLING Co.,Ltd.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200605