CN104531198A - Process for thermal cracking of waste tires - Google Patents

Process for thermal cracking of waste tires Download PDF

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Publication number
CN104531198A
CN104531198A CN201410792574.7A CN201410792574A CN104531198A CN 104531198 A CN104531198 A CN 104531198A CN 201410792574 A CN201410792574 A CN 201410792574A CN 104531198 A CN104531198 A CN 104531198A
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CN
China
Prior art keywords
cracking
nitrogen
junked tire
tire
preheating
Prior art date
Application number
CN201410792574.7A
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Chinese (zh)
Inventor
代永娟
张驰
张国豪
张贯旭
张仕飚
Original Assignee
河北科技大学
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Publication date
Application filed by 河北科技大学 filed Critical 河北科技大学
Priority to CN201410792574.7A priority Critical patent/CN104531198A/en
Publication of CN104531198A publication Critical patent/CN104531198A/en

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    • Y02P20/124

Abstract

The invention discloses a process for thermal cracking of waste tires. The process comprises the following steps: preheating a whole waste tire with a catalyst in a preheating bin by using flowing nitrogen of which the temperature is 300-450 DEG C; then putting the waste tire into a cracking bin, and performing cracking in a flowing nitrogen atmosphere of which the temperature is 600-1000 DEG C; and finally separating steel wires and carbon black after cracking, separating a cracking gas from hot nitrogen, and introducing the cracking gas into a condenser for condensation. In the whole cracking process, oxidation is isolated by the nitrogen, a high-value oil product is obtained, and meanwhile, the recovery rate of pyrolysis oil is improved. The nitrogen used in the process disclosed by the invention is a byproduct from a steel plant, and the heat of the nitrogen is reused in the whole process. The thermal cracking cost of the waste tires is reduced by adopting the waste nitrogen of the steel plant, the cracking quality is improved, and meanwhile, the recovery utilization of the cracking gas ensures that self-sufficiency of energy is realized by the process disclosed by the invention. By adopting the process, the reutilization of industrial waste gases and waste tires is realized, and the aims of resource recovery and energy efficiency are achieved.

Description

A kind of thermal cracking process of junked tire

Technical field

The present invention relates to a kind of recovery processing technique of junked tire, particularly a kind of thermal cracking process of junked tire.

Background technology

Along with the development of automotive industry, grow with each passing day to the demand of the rubber items such as tire, meanwhile, the quantity of junked tire also sharply increases, and brings environmental problem.At present, to the process of junked tire, mainly contain following several method: bury method, burning method, regeneration and cracking process etc., wherein junked tire pyrolysis is the incomplete pyrolytic process that superpolymer under anoxic or rare gas element existence condition in junked tire is cracked at moderate temperatures based on the depot energy of pyrolysis gas, pyrolysis oil, pyrolytic carbon and raw material.Rare gas element pyrolytic technique refers to that in the process of tire pyrolysis, pass into rare gas element in reactor purges reactant, the method can greatly reduce the volatilization phase residence time of product in reactor, inhibit the second pyrolysis of volatilization phase product, thus the yield of pyrolysis oil can be improved.N 2under condition, containing more light-end products in oil product, light-end products have higher utility value compared with heavy oil product, therefore from the utilization of oil product, and N 2conditions favouring is in the oil product obtaining high value.The product of tire pyrolysis is useful industrial chemicals, both eliminates environmental pollution, makes again refuse be fully utilized, and produces economic benefit.Disclosed in prior art there is following defect in junked tire cleavage method: before cracking first by the annular steel wire pull-out in tire, then tire is cut into block, this technique adds production process and processing cost; During cracking, supplying heat source is power supply, and energy consumption is high, of poor benefits; The nitrogen used is produced by Nitrogen plant, and equipment investment is many, Production Flow Chart is long, and cost is high.

Summary of the invention

The object of this invention is to provide a kind of thermal cracking process of junked tire, utilize steel mill to give up nitrogen, save the energy, can continuous seepage be realized.

Concrete, the thermal cracking process of a kind of junked tire of the present invention, comprises the following steps:

(1) feeding warehouse will sent into together with catalyzer after junked tire cleaning and descaling under nitrogen atmosphere, through honeycomb fashion Low Temperature Thermal wind furnace nitrogen is preheated to 300 DEG C ~ 450 DEG C and continued by pipeline pass in feeding warehouse, under anoxic condition, junked tire is preheated to 50 DEG C ~ 280 DEG C;

(2) tire after preheating is sent into the nitrogen cracking storehouse of 600 DEG C ~ 1000 DEG C of continuous flow, carry out catalytic pyrolysis under nitrogen atmosphere, cracking temperature 300 DEG C ~ 580 DEG C;

(3) solid that catalytic pyrolysis produces is sent in discharging transitional storehouse, isolates steel wire and carbon black through magnetic separation;

(4) be separated the gas mixture that catalytic pyrolysis produces, obtain nitrogen and splitting gas respectively, the nitrogen meeting preheating temperature enters pre-heating system and carries out preheating, recycle, and remaining enters hotblast stove and heats, for cracking storehouse;

(5) splitting gas produced obtains fuel gas and cracked oil through condensation, and cracked oil obtains heavy oil, diesel oil and gasoline through processing further.

The thermal cracking process of junked tire of the present invention, junked tire 1min ~ 25min warm up time.

The thermal cracking process of junked tire of the present invention, cracking pressure is normal pressure or 0.01MPa ~ 0.04MPa, and pyrolysis time is 10min ~ 50 min.

The thermal cracking process of junked tire of the present invention, cracking storehouse energy is provided by the nitrogen of 600 DEG C ~ 1000 DEG C of high temperature hot-blast furnace preheating.

The feeding warehouse of nitrogen atmosphere used in the present invention be by the nitrogen of Low Temperature Thermal wind furnace preheating and cracking after high temperature nitrogen provide; tire is heated by heat trnasfer by the nitrogen after preheating in pre-heating cabin; nitrogen both also played heat effect for shielding gas; realize continuous print cracking; enhance the safety of cracking process simultaneously, prevent the inflammable gas produced during cracking from contacting with air and blast.

Catalyzer used in the present invention be by kaolin and/or atlapulgite formulated with arbitrary proportion, the addition of catalyzer and the weight ratio of junked tire are 0.1%-5%.Such ratio selects to accelerate rate of cleavage makes the output of oil fuel reach maximization, reduces temperature of reaction, cost-saving, also avoid virulent gases such as producing dioxin simultaneously.

The byproduct nitrogen that the nitrogen that the present invention uses produces from steelworks.

In the present invention, feeding warehouse preheating speed is fast, and warm up time is short, and the nitrogen after the preheating that heat is produced by honeycomb fashion hotblast stove and the high temperature nitrogen after cracking provide.The heat in cracking storehouse is provided by the high temperature nitrogen of high temperature honeycomb fashion hotblast stove preheating, and inflammable gas source is the inflammable gas produced after junked tire cracking.

The major equipment that junked tire cleavage method of the present invention uses comprises feeding warehouse, cracking storehouse and hotblast stove and is conventional industrial equipments, and market is easily buied, without particular requirement.

The beneficial effect that the present invention obtains is: present invention achieves whole tire charging, eliminate chopping operation, reduce cost.Utilize honeycomb fashion hotblast stove as the origin of heat of whole device, cost is little, avoids secondary pollution.Feeding warehouse and cracking storehouse arrange nitrogen atmosphere protection, are in anaerobic state, improve the security of cracking process, achieve continuous seepage, contribute to economizing on resources.What the present invention not only solved nitrogen carrys out source problem, also solves the place to go problem of steel mill's nitrogen.Technology in metallurgy is applied in the production of macromolecule product by the present invention innovatively, can realize the recycling of industrial gaseous waste and junked tire, reaches the object of resource reclaim.Present invention process operates continuously, and self-sufficient, the steel mill that can realize energy give up the utilization of nitrogen, also reduce the thermo-cracking cost of junked tire, and omnidistance anaerobic state, improves quality product simultaneously.

Embodiment

Following examples are for illustration of the present invention.

Embodiment

(1) be that the junked tire of 100Kg carries out cleaning, impurity elimination by weight; Whole tire is sent into preheating in feeding warehouse, and the useless nitrogen from steelworks being preheating to 350 DEG C through Low Temperature Thermal wind furnace continues through with certain flow velocity the object that feeding warehouse reaches preheating tire, through 15 min, tire is preheated to 200 DEG C;

(2) tire through previous step process is sent into cracking storehouse, add 1.5Kg kaolin catalyst and 1.5Kg activated bauxite catalyst simultaneously, the high temperature nitrogen being preheated to 850 DEG C through high temperature hot-blast furnace is passed into cracking storehouse, now nitrogen not only does heat source but also shield as rare gas element, also can be used as simultaneously sweeping gas splitting gas is taken out of in time cracking storehouse avoid occur second pyrolysis, high temperature nitrogen stability of flow is made to remain on 500 DEG C to make cracking storehouse temperature, cracking 20 min under maintenance normal pressure;

(3) steel wire produced after cracking and carbon black solid matter are sent in discharging transitional storehouse, then by magnetic separation, steel wire and carbon black are carried out being separated and packing carbon black;

(4) be separated the gas mixture that catalytic pyrolysis produces, obtain nitrogen and splitting gas respectively, the nitrogen meeting preheating temperature enters pre-heating system and carries out preheating, recycle, and remaining enters hotblast stove and heats, for cracking storehouse;

(5) splitting gas produced is sent in condenser and is carried out condensation, obtains cracked oil and fuel gas, and wherein cracked oil obtains gasoline, diesel oil and heavy oil through being separated further;

Its product is specific as follows:

Claims (4)

1. a thermal cracking process for junked tire, is characterized in that comprising the following steps:
(1) feeding warehouse will sent into together with catalyzer after junked tire cleaning and descaling under nitrogen atmosphere, through honeycomb fashion Low Temperature Thermal wind furnace nitrogen be preheated to 300 DEG C ~ 450 DEG C and passed into constantly in feeding warehouse by pipeline, under anoxic condition, junked tire being preheated to 50 DEG C ~ 280 DEG C;
(2) tire after preheating is sent into the nitrogen cracking storehouse of 600 DEG C ~ 1000 DEG C of continuous flow, carry out catalytic pyrolysis under nitrogen atmosphere, cracking temperature 300 DEG C ~ 580 DEG C;
(3) solid that catalytic pyrolysis produces is sent in discharging transitional storehouse, isolates steel wire and carbon black through magnetic separation;
(4) be separated the gas mixture that catalytic pyrolysis produces, obtain nitrogen and splitting gas respectively, the nitrogen meeting preheating temperature enters pre-heating system and carries out preheating, recycle, and remaining enters hotblast stove and heats, for cracking storehouse;
(5) splitting gas produced obtains fuel gas and cracked oil through condensation, and cracked oil obtains heavy oil, diesel oil and gasoline through processing further.
2. the thermal cracking process of junked tire according to claim 1, is characterized in that junked tire min warm up time 1 ~ 25.
3. the thermal cracking process of junked tire according to claim 1, is characterized in that cracking storehouse pressure is normal pressure or 0.01MPa ~ 0.04MPa, pyrolysis time 10 ~ 50 min.
4. the thermal cracking process of junked tire according to claim 1, it is characterized in that catalyzer is formulated with arbitrary proportion by kaolin, atlapulgite, the amount of catalyzer and the weight ratio of junked tire are 0.1%-5%.
CN201410792574.7A 2014-12-19 2014-12-19 Process for thermal cracking of waste tires CN104531198A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105331147A (en) * 2015-10-28 2016-02-17 贵州安泰再生资源科技有限公司 Method of preparing carbon black from junked tires
CN105694942A (en) * 2016-04-21 2016-06-22 陕西延长石油(集团)有限责任公司 Method for preparing high aromatic liquefied oil by two-step catalytic pyrolysis of waste rubber
CN105733644A (en) * 2016-03-14 2016-07-06 四川宏图普新微波科技有限公司 Tire rubber pyrolysis method combining pyrolysis gas circulation heating and microwaves
CN106190219A (en) * 2016-08-31 2016-12-07 广东新生环保科技股份有限公司 A kind of decomposition method of organic polymer waste material
CN106334704A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Cracking technology and system of solid organic material
CN106338066A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Solid organic material cracking method and system
CN106338067A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Solid organic material cracking system
CN106916601A (en) * 2017-03-29 2017-07-04 山东铂铠环保科技有限公司 A kind of apparatus and method of the junked tire pyrolysis low ash content low-sulfur carbon black of production
CN107760354A (en) * 2017-11-20 2018-03-06 叶子毓 The continuous cracking device and application method of a kind of waste old
CN109504134A (en) * 2019-01-03 2019-03-22 蔡国政 A kind of waste tire production carbon black treatment process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1208742A (en) * 1997-08-18 1999-02-24 中国科学院山西煤炭化学研究所 Method for prodn. of gasolene, diesel oil and carbon black from waste tyre, and prodn. equipment therefor
US6659025B2 (en) * 2001-10-26 2003-12-09 Zhian Yu Tire recycling process
CN2846413Y (en) * 2005-09-27 2006-12-13 任丽娟 Automatic control treating device for waste tire
CN101089124A (en) * 2006-06-15 2007-12-19 任丽娟 Waste tyre cracking process and apparatus
WO2012149590A1 (en) * 2011-05-05 2012-11-08 Omv Refining & Marketing Gmbh Method and apparatus for energy-efficient processing of secondary deposits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1208742A (en) * 1997-08-18 1999-02-24 中国科学院山西煤炭化学研究所 Method for prodn. of gasolene, diesel oil and carbon black from waste tyre, and prodn. equipment therefor
US6659025B2 (en) * 2001-10-26 2003-12-09 Zhian Yu Tire recycling process
CN2846413Y (en) * 2005-09-27 2006-12-13 任丽娟 Automatic control treating device for waste tire
CN101089124A (en) * 2006-06-15 2007-12-19 任丽娟 Waste tyre cracking process and apparatus
WO2012149590A1 (en) * 2011-05-05 2012-11-08 Omv Refining & Marketing Gmbh Method and apparatus for energy-efficient processing of secondary deposits

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105331147A (en) * 2015-10-28 2016-02-17 贵州安泰再生资源科技有限公司 Method of preparing carbon black from junked tires
CN106338067B (en) * 2016-03-14 2018-12-07 四川宏图普新微波科技有限公司 A kind of solid organic material cracking system
CN105733644A (en) * 2016-03-14 2016-07-06 四川宏图普新微波科技有限公司 Tire rubber pyrolysis method combining pyrolysis gas circulation heating and microwaves
CN106338066B (en) * 2016-03-14 2018-12-07 四川宏图普新微波科技有限公司 A kind of cleavage method and system of solid organic material
CN106334704A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Cracking technology and system of solid organic material
CN106338066A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Solid organic material cracking method and system
CN106338067A (en) * 2016-03-14 2017-01-18 四川宏图普新微波科技有限公司 Solid organic material cracking system
WO2017157180A1 (en) * 2016-03-14 2017-09-21 四川宏图普新微波科技有限公司 Method of tyre rubber pyrolysis employing combined heating and microwaving and recycling pyrolysis gas
CN105694942A (en) * 2016-04-21 2016-06-22 陕西延长石油(集团)有限责任公司 Method for preparing high aromatic liquefied oil by two-step catalytic pyrolysis of waste rubber
CN106190219A (en) * 2016-08-31 2016-12-07 广东新生环保科技股份有限公司 A kind of decomposition method of organic polymer waste material
CN106190219B (en) * 2016-08-31 2018-08-07 广东新生环保科技股份有限公司 A kind of decomposition method of organic polymer waste material
CN106916601A (en) * 2017-03-29 2017-07-04 山东铂铠环保科技有限公司 A kind of apparatus and method of the junked tire pyrolysis low ash content low-sulfur carbon black of production
CN107760354A (en) * 2017-11-20 2018-03-06 叶子毓 The continuous cracking device and application method of a kind of waste old
CN109504134A (en) * 2019-01-03 2019-03-22 蔡国政 A kind of waste tire production carbon black treatment process

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Application publication date: 20150422

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