CN1037093C - Method and equipment for producing styrene and by-product using waste polystyrene - Google Patents
Method and equipment for producing styrene and by-product using waste polystyrene Download PDFInfo
- Publication number
- CN1037093C CN1037093C CN93118016A CN93118016A CN1037093C CN 1037093 C CN1037093 C CN 1037093C CN 93118016 A CN93118016 A CN 93118016A CN 93118016 A CN93118016 A CN 93118016A CN 1037093 C CN1037093 C CN 1037093C
- Authority
- CN
- China
- Prior art keywords
- cracking
- vinylbenzene
- rectifying tower
- pyrolyzer
- equipment
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to a production method of styrene and the side products thereof by using waste polystyrene, and an apparatus thereof, wherein the production method comprises the steps that the waste polystyrene is thickened by thermal shrinkage and crushed, and then the waste polystyrene enters a cracking furnace with a catalyst together. An anchor type stirring device with a scraping plate, and a liftable discharge pipe are adopted in the cracking furnace, so the present invention solves the problems that coke is easy to form at the bottom of the furnace in a cracking process, so heat conduction, the yield of the styrene, the service life of the styrene, etc. are influenced.
Description
The present invention is a kind of cinnamic preparation method, particularly relates to a kind ofly producing cinnamic method and apparatus with deposed polystyrene.
Traditional production of styrene method is to utilize oil through catalysis, cracking, therefrom isolate benzene, toluene, ethene etc., elder generation's addition obtains vinylbenzene through dehydrogenation, rectifying separation again, and along with the continuous development of the in short supply and national economy of oil, the vinylbenzene contradiction that supply falls short of demand is more and more significant.
The polystyrene that is formed by styrene polymerization has purposes widely, as dinner ware made; The wrapping material of electrical equipment, instrument, high-grade furniture etc., effect with health, decoration, shockproof, prevent breakage, but, because the use of above-mentioned materials can only be disposable, the consequent is exactly to bring serious pollution to social environment, the disposable porous plastics lunch box that abandons as the railway both sides, electrical package pad that the Refuse bin is found everywhere etc., the maximum characteristics of this class waste are exactly can not rot voluntarily, so how handling these plastic garbages just becomes people's problem anxious to be solved.
At present, though many producers, research unit are arranged all in the comprehensive utilization of exploring deposed polystyrene, what have has also realized with the monomeric process of deposed polystyrene cracking preparation of styrene, still, and on scale, they once can only handle tens kilograms, on technology, none good, at the terms of settlement that combines in the coking layer at the bottom of the still that produces in the cracking process, so whenever do a cracking, will clear up at the bottom of still, and make the production can not serialization.
The present invention provides and a kind ofly prepares cinnamic method with deposed polystyrene, can not only improve cinnamic output to reach, and can also turn waste into wealth, and becomes the purpose of polluting for cleaning.
Another object of the present invention provides and a kind ofly can realize continuous production, the cinnamic production method of automatic decoking in the deposed polystyrene cracking process.
Another object of the present invention provides the used equipment of an above-mentioned cinnamic production method of cover.
Processing method of the present invention is deposed polystyrene to be introduced in the pyrolyzer that agitator with anchor formula belt scraping plate is stirred in normal pressure or decompression (as 0.01-0.05MPa) and as cracking under 300-400 ℃ the condition, the cracked gas that furnace roof comes out becomes lysate through condenser condenses, and furnace bottom is the scission reaction resistates.
After finishing, scission reaction falls the lift discharge nozzle that body of heater is installed, cracking resistates and impurity are discharged adding to depress, lysate is sent into separating device to be separated, obtain vinylbenzene and byproduct thereof, before cracking, polystyrene can be carried out pyrocondensation or mechanical defoaming density, fragmentation and/or melt in advance.In cracking, can also use catalyzer.
Described density, fragmentation and melt process in advance, be in order to make the material charging convenient, to help the thawing of material in stove, and fully cracking in cracking process.
After the material that melts enters pyrolyzer, because material is gelatin, add the biological material of the deposed polystyrene that does not melt fully, make heat-transfer effect relatively poor, react very slow; Simultaneously, because the refuse material is very dirty, be mingled with a lot of silts, adding material itself just has carbon dust to generate in cracking process, work as silt, when coke powder and material and split product mix, be easy to form as tight hard coking layer as the bituminous highway, heat conduction efficiency is descended more than 90%, is to influence the scission reaction time, the vinylbenzene productive rate, the major cause in energy utilization rate and pyrolyzer life-span, the agitator of employing anchor formula belt scraping plate, catalyzer is contacted with material evenly, increase thermal conduction, reduce the scission reaction time, burnt layer is wiped off once forming, can not form thicker coking layer, influence the scission reaction process.Can work as scission reaction under normal pressure or 300-400 ℃ condition of decompression, about 4 hours of cracking time, when the cracking quantum of output reaches the 80-90% of total charging capacity, stop heating, reaction is finished substantially, furnace bottom can have some silts, cracking resistates and impurity, as untimely removing, meeting coking in stove, take place for fear of above-mentioned phenomenon, avoid discharge nozzle to contact simultaneously with stove fire or stack gas, make its inner raffinate and residue carbonization, stop up discharge nozzle, can adopt the lift discharge nozzle to be installed in the body of heater top goes up or the side, discharge nozzle is fallen, the steam pressurized of available 0.15-0.25MPa with raffinate outside discharge nozzle extrudes stove, the lysate that the described gas that comes out from pyrolyzer obtains through condensation can be with a rectifying tower by the cat head extraction than the low-boiling light constituent of vinylbenzene, as benzene, toluene, ethylbenzene etc., extraction liquid enters another rectifying tower at the bottom of the tower, the extraction heavy constituent higher at the bottom of the tower than vinylbenzene boiling point, as isopropyl benzene, tar etc. obtain meeting the styrene product more than 99.0% that GB (GB3915-90) requires from cat head.Isolated light constituent benzene, toluene and ethylbenzene etc. can be used as industrial chemicals again, and isolated heavy constituent can further separate through system lacquer stove, extract the mixture of isopropyl benzene and alpha-methyl styrene, and resistates can be used for producing rust-inhibiting paint or waterproof paint.
Of the present inventionly produce cinnamic method with deposed polystyrene and can further be illustrated with accompanying drawing.
Accompanying drawing 1 is vinylbenzene and byproduct thereof are produced in expression with deposed polystyrene a process flow sheet.Raw material through density, fragmentation, melt in advance, catalytic pyrolysis process and sepn process obtain light constituent, vinylbenzene and heavy constituent.
The deposed polystyrene that utilizes of the present invention is produced cinnamic method, advantage with sufficient raw, cheap, less investment, instant effect, and flow process is short, advanced technology, and the cinnamic quality of main products can be up to state standards (GB3915-90), and byproduct serves many purposes.
The used equipment of production method of the present invention comprises the agitator that has anchor formula belt scraping plate and the pyrolyzer and the separating device of lift discharge nozzle.Also can further comprise baking oven, crusher and system lacquer stove.
Described baking oven is used for the density of deposed polystyrene froth breaking.
Described crusher is convenient for charging, and the material after the density is pulverized, and makes it be easy to melt in stove.
Described pyrolyzer can comprise change speed motor, body of heater, opening for feed, the agitator of anchor formula belt scraping plate, Liftable type discharge nozzle, cracked gas outlet, valve tube, vapour pipe.In cracking process, since deposed polystyrene itself with silt, cracking process in the carbon dust, material and the split product that produce mix and be easy to form the coking layer, thereby have influence on heat conduction efficiency, scission reaction time, vinylbenzene productive rate and pyrolyzer life-span, adopt the agitator of anchor formula belt scraping plate, can not only avoid the generation of above-mentioned phenomenon, but also material is contacted with catalyzer evenly, increase thermal conduction, reduce the scission reaction time.After scission reaction is finished substantially, fall the Liftable type discharge nozzle, impurity such as the silt that is easy to coking, cracking resistates are emitted in pressurization, guarantee that next cracking process proceeds.
The lysate that described separating device can come out pyrolyzer is divided into the boiling point light constituent lower than vinylbenzene, heavy constituent and styrene product that boiling point is higher than vinylbenzene.
Described system lacquer stove can the heavy constituent that boiling point is higher than vinylbenzene be done further deep processing, isolate isopropyl benzene etc. after, add auxiliary agent in the residue and auxiliary material obtains rust-inhibiting paint or waterproof paint.
Described production method equipment used of the present invention can further include and melts stove in advance, and the material that it can enter pyrolyzer carries out heating and melting earlier, and cracking process is thereafter accelerated, and reduces the operating time.
The used equipment of described production method of the present invention can further include two rectifying tower that are used to separate purification, the light constituent that the main extraction boiling point of the cat head of first rectifying tower is lower than vinylbenzene; Cat head at second rectifying tower can obtain the styrene product of content more than 99.0% (weight), mainly obtains the boiling point heavy constituent higher than vinylbenzene at the bottom of the tower.Rectifying can be adopted normal pressure or rectification under vacuum, also stopper such as Resorcinol can be added in the charging.
What accompanying drawing 2 was represented is the synoptic diagram of pyrolyzer, and label 1 is a body of heater; 2 is the agitator of anchor formula belt scraping plate; The 3rd, change speed motor; The 4th, the lift discharge nozzle; The 5th, opening for feed.
Embodiment
With the polystyrene of the useless foaming of 500Kg through pyrocondensation density, fragmentation, in advance melt after, together enter in the pyrolyzer with the catalyst copper powder of 0.125Kg, normal pressure stirs down-firing and is warming up to 320 ℃ of cracking and begins.When observing the cracking liquid measure of from pyrolyzer, coming out and reach the 85-90% of inlet amount, stop heating, with the steam utilization lift discharge nozzle of 0.2MPa cracking resistates and impurity 50Kg are discharged, obtain lysate 450Kg.Lysate is sent into first rectifying tower, in the cat head extraction than the low-boiling light constituent 67.5Kg of vinylbenzene, extraction liquid enters second rectifying tower at the bottom of the tower, obtain the vinylbenzene 315Kg that content reaches the GB3915-90 standard by cat head, system lacquer stove is sent in the heavy constituent higher than vinylbenzene boiling point of extraction at the bottom of the tower, separation obtains isopropyl benzene and alpha-methyl styrene is total to 13.5Kg, and its raffinate adds auxiliary agent and auxiliary material can get rust-inhibiting paint 100Kg.
Above-mentioned technical process equipment used comprises baking oven, crusher, melts pyrolyzer and two rectifying tower and the system lacquer stove of stove, the agitator that has anchor formula belt scraping plate and lift discharge nozzle, steam under pressure inlet, opening for feed and cracked gas outlet in advance.
Claims (8)
1, a kind ofly produce cinnamic method with deposed polystyrene, comprise deposed polystyrene is carried out cracking at normal pressure or decompression under 300-400 ℃, its lysate obtains vinylbenzene after separating, it is characterized in that cracking is to carry out under the stirring of agitator of the anchor formula belt scraping plate in pyrolyzer, in the cracking process, by the carbon dust that produces in the cracking, the silt that material brings, the coking layer of formations such as material itself and/or split product is wiped off with regard to the scraper plate that is stirred on the device once forming, and the liftable discharge nozzle pressurization that usefulness such as resistates after the cracking and/or impurity are fallen discharges out of the furnace.
2, the method for claim 1 is characterized in that carrying out density, pulverizing before the deposed polystyrene cracking and/or melting in advance.
3, the method for claim 1 is used copper powder catalyst when it is characterized in that cracking.
4, the method for claim 1 is characterized in that resistates after vapour pressure with 0.15-0.25MPa is with cracking and/or impurity etc. extrude outside the stove by the discharge nozzle that drops to the bottom.
5, the method for claim 1, the lysate that it is characterized in that coming out from pyrolyzer is through first rectifying tower, by the cat head extraction boiling point light constituent lower than vinylbenzene, extraction liquid enters second rectifying tower at the bottom of the tower, cat head by second rectifying tower obtains content in the styrene product more than 99.0%, is mainly the boiling point heavy constituent higher than vinylbenzene at the bottom of the tower in the extraction liquid.
6, the equipment of the method for claim 1 is characterized in that comprising the agitator that contains anchor formula belt scraping plate and the pyrolyzer and the separating device of liftable discharge nozzle.
7, the equipment of method as claimed in claim 2 is characterized in that comprising baking oven, the pulverizer that is used to pulverize that is used for density and melts stove in advance.
8, equipment as claimed in claim 6 is characterized in that its separating device comprises two rectifying tower, promptly is used to isolate first rectifying tower of the boiling point light constituent lower than vinylbenzene, is used to obtain second rectifying tower of content in the styrene product more than 99.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93118016A CN1037093C (en) | 1993-10-08 | 1993-10-08 | Method and equipment for producing styrene and by-product using waste polystyrene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93118016A CN1037093C (en) | 1993-10-08 | 1993-10-08 | Method and equipment for producing styrene and by-product using waste polystyrene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1088568A CN1088568A (en) | 1994-06-29 |
| CN1037093C true CN1037093C (en) | 1998-01-21 |
Family
ID=4992285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93118016A Expired - Fee Related CN1037093C (en) | 1993-10-08 | 1993-10-08 | Method and equipment for producing styrene and by-product using waste polystyrene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037093C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058260A (en) * | 2022-06-22 | 2022-09-16 | 常州工学院 | Cracking furnace device for treating waste polystyrene and operation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2359212A (en) * | 1941-09-17 | 1944-09-26 | Dow Chemical Co | Process for depolymerizing polystyrene |
| SU1035017A1 (en) * | 1982-03-31 | 1983-08-15 | Воронежский технологический институт | Method for preparing styrene |
-
1993
- 1993-10-08 CN CN93118016A patent/CN1037093C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2359212A (en) * | 1941-09-17 | 1944-09-26 | Dow Chemical Co | Process for depolymerizing polystyrene |
| SU1035017A1 (en) * | 1982-03-31 | 1983-08-15 | Воронежский технологический институт | Method for preparing styrene |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1088568A (en) | 1994-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101230284B (en) | Delayed coking treatment method for waste plastics and treatment device thereof | |
| US5811606A (en) | Process and equipment for treatment of waste plastics | |
| CN107746722A (en) | The method and apparatus that a kind of cracking waste plastics prepare gasoline and diesel oil | |
| GR3036510T3 (en) | Process for the complete conversion of hydrocarbon materials with a high molecular weight | |
| CN101550056B (en) | A thermal plasma coal cracking - gasification coupling process and reaction unit | |
| KR20020052168A (en) | A process for producing gasoline and diesel from waste plastics and/or heavy oil | |
| EP1707614A1 (en) | Thermal or catalytic cracking process for hydrocarbon feedstocks and corresponding system | |
| CN203159540U (en) | Device for continuously producing fuel oil by waste plastics and/or waste rubber | |
| CN103275757B (en) | A kind of method of oil gas coupling Poly-generation in Chemical Industry | |
| CN109517612A (en) | A kind of damaged tire superheated steam energy conversion method of continuous high-efficient green | |
| CN106635079A (en) | Solid waste RDF treating method | |
| CN202610189U (en) | Automatic continuous production equipment for regenerated diesel oil from waste oil through catalytic cracking | |
| CN102071042A (en) | Intelligentized continuous quick microwave cracking device for biomass and waste of biomass | |
| CN1962818B (en) | Process for preparing bio-oil by using rapid thermal cleavage technology | |
| EP2834323A1 (en) | System and method for converting plastic/rubber to hydrocarbon fuel by thermo-catalytic process | |
| CN1434100A (en) | Method for making fuel oil by mixing-cracking waste plastics, waste oil and heavy oil | |
| CN101759148B (en) | Process of generating hydrogen by cracking biomass with molten alkali | |
| Shen et al. | Ultrapyrolysis of automobile shredder residue | |
| CN1037093C (en) | Method and equipment for producing styrene and by-product using waste polystyrene | |
| CN1102605C (en) | Process for treating waste rubber or plastics and its gasifying equipment | |
| CN210420095U (en) | Utilize potassium hydroxide serialization to handle device of useless metal sodium | |
| CN209412150U (en) | A kind of autonomous superheated steam energy source conversion system of damaged tire of continuous high-efficient green | |
| CN217230618U (en) | Organic dangerous solid waste recycling equipment | |
| JP3959009B2 (en) | Thermal decomposition recycling method of organic matter | |
| EP3634616B1 (en) | Method of preparation of hydrocarbon fuels from polyolefin waste materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |