CN101831313A - Waste plastics pretreatment process based on coking by coke oven - Google Patents
Waste plastics pretreatment process based on coking by coke oven Download PDFInfo
- Publication number
- CN101831313A CN101831313A CN201010166299A CN201010166299A CN101831313A CN 101831313 A CN101831313 A CN 101831313A CN 201010166299 A CN201010166299 A CN 201010166299A CN 201010166299 A CN201010166299 A CN 201010166299A CN 101831313 A CN101831313 A CN 101831313A
- Authority
- CN
- China
- Prior art keywords
- pyrolysis
- coking
- waste plastics
- plastic waste
- coke
- 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
Links
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a waste plastics pretreatment process based on coking by a coke oven, which solves the problems of low equipment life, large environmental influence and influenced coke quality after coal blending in the process of treating waste plastics by using the coking process in the prior art. The technical scheme adopted by the invention is as follows: (1) performing coarse crushing on the waste plastics by a crusher until the grain size is 8-12mm; (2) feeding the waste plastics with the grain size of 8-12mm after coarse crushing in a pyrolysis oven, heating to 225-275 DEG C under the condition of air isolation, pyrolyzing for 30-90min at a constant temperature and dissolving out pyrolysis gas; (3) cooling the fluid residue of the waste plastics after pyrolysis to form solid-state solids, and feeding the solid-state solids in the crusher again for crushing until the grain size is no more than 1mm; and (4) blending the solid-state solids in coking coal according to the proportioning of 1% by weight. The invention has the advantages of simple process, no environment pollution and no influence on coke quality.
Description
Technical field
The present invention relates to a kind of green technology, a kind of specifically waste plastics pretreatment process based on coking by coke oven.
Background technology
The plastic waste that reclaims has following characteristics:
1. the waste plastics recovery amount of this class greatly, mostly contains chlorine, the cl content that has even up to 51.10%.
2, wide material sources, inclusion is many: these class plastics have from the scrap stock that produce in factory's production process, defect ware etc., also have from product after the various personal consumptions that reclaim in the society or the like, this class waste product is often contaminated, have painted also is printed on trade mark, what have also contains impurity such as sand, cutting metal, wood chip or shredded paper, and tiny solid impurity is difficult to remove by handling in common go-no-go or early stage.
3, soft or hard varying degree: the plastic waste of recovery is from every field, and there wherein have hard also to have to be soft.
Utilizing coking process treatment of waste plastics technology is the combination of traditional coal coking technology and modern plastic waste processing treatment technology, utilizes the technical scheme of coking process treatment of waste plastics to mainly contain following three classes at present:
(1) plastic waste fully is melted in the pitch, is cooled to room temperature then, be crushed to particle diameter below 3 millimeters with pulverizer again and allocate in the coking coal.
(2) with the plastic waste simple crushing to certain particle size (≤10mm), again with itself and coal uniform mixing, bonding, plated film and be pressed into moulded coal, final and coke making and coal blending is mixed into coking by coke oven.
(3) operations such as plastic waste collection, cleaning and processing are made plastic grain and the plastic waste bar is allocated in the coking coal.
Utilize three kinds of above-mentioned plastic waste coal-blending coking technology to be used for treatment of waste plastics and all have following problems:
When 1, handling chloride higher plastic waste, if directly allocate coking coal into, in process of coking, the most of chlorine that decomposes will enter in the coke-oven gas, can produce heavy corrosion to gas line and gas purification equipment, influence the work-ing life of equipment, when temperature is higher than 500 ℃, chlorine in the plastic waste can generate dioxin-like chemical, environment is produced have a strong impact on.
2, because the plasticity of plastic waste, pulverizer commonly used plastic waste can not be crushed to thinner granularity (≤1mm), when allocating coking coal into, it is inhomogeneous to cause the plastic waste particle to disperse in coking coal, thereby cause the problem of coke quality decline.
3, because the wide material sources of plastic waste, wherein unavoidably can be mixed with various inclusiones, particularly attached to frosting or dissolve in wherein label paper, fine sand, rubble or metallic particles etc., these materials are difficult to be difficult to remove by ordinary method, allocate the quality that also can influence coke behind the coking coal into.
Summary of the invention
To the objective of the invention is in order solving the problems of the technologies described above, to provide that a kind of technology is simple, dechlorination is effective, can remove tiny impurity, help pulverizing, allocate into the waste plastics pretreatment process based on coking by coke oven that can improve coke quality behind the coking coal.
Another object of the present invention is for a kind of pyrolysis oven that is exclusively used in above-mentioned treatment process is provided.
Treatment process of the present invention may further comprise the steps:
(1) with plastic waste through tentatively carrying out coarse breaking to granularity 8-12mm with pulverizer;
(2) coarse breaking to the plastic waste of granularity 18-12mm is sent into pyrolysis oven, under the condition of secluding air, be heated to 225-275 ℃,, separate out pyrolysis gas through the pyrolysis of 30-90min constant temperature;
(3) pyrolysis gas is sent into recycle in the coke oven gas purification system after the liming washing; Residue after the plastic waste pyrolysis is a fluidised form, and cooling back forms solid-stately to be sent into pulverizer again and be crushed to≤the 1mm granularity;
(4) be that 1% proportioning is allocated in the coking coal by mass percentage.
Because the chlorine in the plastic waste is to the problem of equipment corrosion, the contriver considers to adopt pyrolysis method to remove most chlorine earlier in waste plastics pretreatment process, under pyrolysis furnace high-temperature and anaerobic environment, plastic waste is broken down into pyrolysis gas and pyrolysis residue two portions, the pyrolysis band of gas is walked most chlorine (in the plastic waste more than 96% quality of chlorine), after the liming washing, can send into recycle in the coke-oven gas again.Remove for the overwhelming majority that guarantees chlorine, the contriver is through repeatedly testing and analyze discovery, before 275 ℃, along with pyrolysis temperature raises, the pyrolysis residue productive rate of plastic waste reduces fast, and 225-275 ℃ violent thermolysis takes place, separate out a large amount of gas things, volatile matter has removed more than 50%; When being increased to 275 ℃, because violent thermolysis takes place plastic waste, pyrolysis residue plasticity is eliminated especially, and when the constant temperature pyrolysis reached 60min, plastic waste pyrolysis residue cl content can sharply be reduced to (the chlorine decreasing ratio is more than 96%) below 2.14%; And after 275 ℃, then raise along with pyrolysis temperature, thermolysis and bubbing speed take place to slow down, pyrolysis residue productive rate descends.The pyrolysis gas of separating out becomes main component after the washing of liming or sig water be the CmHn inflammable gas, and this gas can be sent into recycle once more in the existing coke oven gas purification system, and real is energy-saving and cost-reducing, is beneficial to environment protection.
Therefore take all factors into consideration the maximum performance and the cost control of pyrolysis efficient, in the step (2), preferred described Heating temperature is 275 ℃, and heat-up rate is 5 ℃/min, and the constant temperature pyrolysis time is 60min.Described pyrolysis oven is not particularly limited, as long as satisfy secluding air and correlated response temperature requirement.
Further, the contriver thinks that the plastic waste particle diameter of allocating coking coal into is big more, the quality uniformity variation of coking coal, thus the coke strenth of generation is descended; And when particle size after cracking≤1mm, then can eliminate the disadvantageous effect that STRENGTH ON COKE intensity is brought of allocating into of plastic waste.Therefore, the present invention requires particle size after cracking to be controlled at≤1mm, so that tiny plastic waste particle homodisperse in coking coal.And the solids plasticity that the cooling of the residue after pyrolysis back forms is abolished fully, can easily this solids be crushed to the tiny granularity that needs, and utilizes common crusher it can be crushed to≤the 1mm granularity.
Further, before residue after the pyrolysis is uncolled is fluidised form, this moment, positive good utilisation filtration method filtered, and can will be mingled with effectively being filtered by pyrolytic solid inclusion (as fine sand, rubble or metallic particles) wherein under 275 ℃, thereby guaranteed to allocate into after the cooling quality of coking coal.Therefore, described filtration method is not particularly limited, and for example uses centrifugal filtration process, can remove the matter that is mingled with more than 90% mass percent, has improved the quality of allocating the solids in the coking coal into greatly.
Beneficial effect:
1, utilized pyrolytic technique to kill two birds with one stone thoroughly to solve chlorine in the plastic waste to remove the problem of the particle size after cracking of (the chlorine decreasing ratio reaches more than 96%) and plastic waste, both avoided the corrosion of the chlorine that discharges in the process of coking to equipment, cooled solids plasticity is abolished fully simultaneously, can be crushed to granularity≤1mm with common crusher.And pyrolysis temperature is only up to 275 ℃, and chlorine can not generate dioxin-like chemical under this temperature, can not impact environment.
2, the solids after granularity≤1mm pyrolysis is allocated in the coking coal, can be solved the plastic waste particle and in coking coal, disperse uneven problem, thereby guarantee coke quality.
3, the residual flow thing after the pyrolysis filters earlier under fluidised form, cool off again after removing wherein insoluble inclusion, can further guarantee to allocate into the high purity of the plastic waste of coking coal, avoid owing to too much there is the problem that influences the coking coal quality in inclusion in the plastic waste.
4, pyrolytic pyrolysis air purge is washed the back and sent into the coke oven gas purification system with coke-oven gas, and the cooled solids of pyrolysis can be allocated coking coal into, does not produce secondary slugs, satisfies and saves energy and reduce the cost, and is significant in the environment protection and the utilization of resources.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1
The plastic waste source: coal-blending coking is taken from the various mixed waste plastics that the Wuhan City eastern plastic waste of force source mill reclaims from society, cl content 51.10% (mass percent) with plastic waste.
Pretreatment technology:
(1) above-mentioned plastic waste is sent into primary crusher after by washing machine water flush away surface earth, with the plastic waste coarse crushing to 8-12mm;
(2) plastic waste after the coarse crushing is sent into the plastic waste pyrolysis oven, plastic waste heat-up rate with 5 ℃/min under the condition of secluding air is heated to 225-275 ℃, through the pyrolysis of 30-90min constant temperature, obtain the pyrolysis residue of pyrolysis gas and fluidised form, the pyrolysis gas of separating out accounts for plastic waste quality 56%, wherein contains the HCl gas that the above chlorine of 96% (mass percent) generates in the plastic waste;
The pyrolysis gas of (3) separating out is drawn by the pyrolysis oven top and is entered the liming washing tower, absorb pyrolytic HCl gas with the liming washing, the gas main component of washing behind the tower is the CmHn inflammable gas, this inflammable gas is sent into gas-holder earlier store, be mixed through coke-oven gas negative-pressure pipeline and coke-oven gas (COG) afterwards and send into the coke oven gas purification system.
(4) the effusive pyrolysis residue in plastic waste pyrolysis oven bottom enters watercooler again and is cooled to solid-state frangible solids after directly sending into centrifugal filter with fluidised form and filtering out inclusion more than 90%, is crushed to granularity≤1mm with pulverizer then.
(5) solids and 1: 99 by ratio of weight and the number of copies the proportioning of coking coal after will pulverizing allocated in the coking coal.
The broken plastic waste coal-blending coking coke important quality index of moulding of pyrolysis
List weight proportion (dry coal: the pyrolysis plastics) be 100: 0 (not allocating plastic waste into) in the last table respectively, 99: 1, with 98: 2, the important indicator of coke contrast under three kinds of coking coal proportioning situations (described pyrolysis plastics refer to after the inventive method pre-treatment, obtain solids).M
25(coke shatter strength) is slightly to improve in 99: 1 o'clock in proportioning, but is 98: 2 o'clock M in proportioning
25Variation; M after allocating the pyrolysis plastic waste into
10(coke abrasive wear resistance) reduces, and promptly the coke abrasive wear resistance strengthens; CRI (coke reactivity) is to reduce at 99: 1 in proportioning, but is being to increase 2.22% at 98: 2 o'clock in proportioning; CSR (postreaction strength of coke) all descends after allocating the pyrolysis plastic waste into, but is only to descend 0.93% at 99: 1 in proportioning, and proportioning is to descend at 98: 2 to reaching 4.77%, and postreaction strength of coke obviously degenerates.
In sum, when the pyrolysis plastic waste amount of allocating into 1% important quality index of coke except that CSR slightly descends, other indexs M
25, M
10All slightly improve with CRI.But the important quality index CSR of coke obviously degenerates when the pyrolysis plastic waste amount of allocating into 2%, thereby has limited the amount of allocating into of pyrolysis plastic waste.This shows that its amount of allocating into of pyrolysis plastic waste coal-blending coking is can not influence coke quality at 1% o'clock.
Claims (4)
1. the waste plastics pretreatment process based on coking by coke oven is characterized in that, may further comprise the steps:
(1) plastic waste is carried out coarse breaking to granularity 8-12mm through pulverizer;
(2) coarse breaking to the plastic waste of granularity 8-12mm is sent into pyrolysis oven, under the condition of secluding air, be heated to 225-275 ℃,, separate out pyrolysis gas through the pyrolysis of 30-90min constant temperature;
(3) residue after the plastic waste pyrolysis is a fluidised form, and the cooling back forms solid-state solids, sends into pulverizer again and is crushed to≤the 1mm granularity;
(4) be that 1% proportioning is allocated in the coking coal by mass percentage with above-mentioned solids.
2. the waste plastics pretreatment process based on coking by coke oven as claimed in claim 1 is characterized in that, in the step (2), and described Heating temperature to 275 ℃, heat-up rate is 5 ℃/min, the constant temperature pyrolysis time is 60min.
3. the waste plastics pretreatment process based on coking by coke oven as claimed in claim 1 is characterized in that, in the step (2), the pyrolysis gas of separating out is sent in the coke oven gas purification system with coke-oven gas after liming washing dechlorination.
4. as claim 1 or 2 or 3 described waste plastics pretreatment process, it is characterized in that in the step (3), the residue after the described pyrolysis is removed the solids that wherein is mingled with by filtration method earlier under fluidised form, cool off again based on coking by coke oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166299A CN101831313A (en) | 2010-04-30 | 2010-04-30 | Waste plastics pretreatment process based on coking by coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166299A CN101831313A (en) | 2010-04-30 | 2010-04-30 | Waste plastics pretreatment process based on coking by coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101831313A true CN101831313A (en) | 2010-09-15 |
Family
ID=42715533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010166299A Pending CN101831313A (en) | 2010-04-30 | 2010-04-30 | Waste plastics pretreatment process based on coking by coke oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101831313A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758033A (en) * | 2012-07-04 | 2012-10-31 | 山东轻工业学院 | Spray gun used for blowing waste plastic pyrolysis gas premixed pulverized coal and blowing method |
| CN102758035A (en) * | 2012-07-04 | 2012-10-31 | 山东轻工业学院 | Spraying gun and spraying method for blowing waste plastic pyrolysis gas and premixed coal powder |
| CN105316016A (en) * | 2014-07-31 | 2016-02-10 | 宝山钢铁股份有限公司 | Method for producing coke through co-coking coal and waste/used phenolic plastics |
| US11999920B2 (en) | 2021-09-10 | 2024-06-04 | Ecolab Usa Inc. | Cold flow additives for plastic-derived synthetic feedstock |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002012876A (en) * | 2000-06-28 | 2002-01-15 | Sumitomo Metal Ind Ltd | Method for treating waste plastic in coke oven |
-
2010
- 2010-04-30 CN CN201010166299A patent/CN101831313A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002012876A (en) * | 2000-06-28 | 2002-01-15 | Sumitomo Metal Ind Ltd | Method for treating waste plastic in coke oven |
Non-Patent Citations (2)
| Title |
|---|
| 余广炜: "利用焦化工艺处理废旧塑料实验研究", 《中国博士学位论文全文数据库，工程科技I辑》 * |
| 钱晖 等: "煤与废塑料共焦化试验研究", 《钢铁》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758033A (en) * | 2012-07-04 | 2012-10-31 | 山东轻工业学院 | Spray gun used for blowing waste plastic pyrolysis gas premixed pulverized coal and blowing method |
| CN102758035A (en) * | 2012-07-04 | 2012-10-31 | 山东轻工业学院 | Spraying gun and spraying method for blowing waste plastic pyrolysis gas and premixed coal powder |
| CN105316016A (en) * | 2014-07-31 | 2016-02-10 | 宝山钢铁股份有限公司 | Method for producing coke through co-coking coal and waste/used phenolic plastics |
| CN105316016B (en) * | 2014-07-31 | 2017-10-31 | 宝山钢铁股份有限公司 | A kind of method that coal produces coke with waste and old phenoplasts co carbonization |
| US11999920B2 (en) | 2021-09-10 | 2024-06-04 | Ecolab Usa Inc. | Cold flow additives for plastic-derived synthetic feedstock |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101033066B (en) | Method of recovering silicon carbide micro-powder | |
| CN101474834B (en) | Cyclic utilization method of waste and old rubber | |
| CN103949459B (en) | A kind of electrolytic aluminium breeze of recycling produces aluminium electrolyte and the method reclaiming carbon | |
| CN100447187C (en) | Process of reclaimed rubber by improved high-temperature dynamic desulfurization | |
| CN111717916B (en) | Method and device for producing active calcium oxide as calcium carbide raw material by wet method calcium carbide slag | |
| CN105132949B (en) | A kind of method of comprehensive utilization of aluminum electrolysis waste cathode material | |
| CN104162536A (en) | Harmless treatment and resource utilization method of waste cathode | |
| CN104438280A (en) | Method for sorting waste aluminum electrolytic cathodes | |
| CN103849017A (en) | Preparation method of tire reclaimed rubber | |
| CN102295396B (en) | Reprocessing and comprehensive utilization method of red mud | |
| CN103949460A (en) | Device and method for producing regenerative electrolyte from aluminum-electrolysis carbon residues | |
| CN101831313A (en) | Waste plastics pretreatment process based on coking by coke oven | |
| CN104311882A (en) | Method for recovering waste stone powder | |
| CN104496413B (en) | The processing technology of Imitation Rock Porcelain Tiles | |
| CN108726522B (en) | Silicon slag electric separation method capable of effectively improving silicon metal recovery rate | |
| CN106242518A (en) | A kind of riverway sludge fires ancient blue bricks and preparation method thereof | |
| CN111848190B (en) | Environment-friendly anhydrous stemming for double-taphole blast furnace and preparation method thereof | |
| CN108011147B (en) | Waste lead-acid storage battery treatment system, treatment process and application of secondary lead | |
| CN104016318B (en) | A kind of phosphorus production combination charcoal element reductive agent and preparation method thereof | |
| CN113200680B (en) | Microcrystalline glass and preparation method thereof | |
| CN103613300A (en) | Recycling and treatment process and device for waste ceramic by crushing and grinding and pre-mixed concrete | |
| CN107445614A (en) | A kind of compound zirconium oxide powder and preparation method thereof | |
| CN107902908A (en) | It is a kind of to utilize devitrified glass of iron tailings processing and preparation method thereof | |
| CN104986897B (en) | Method for recovering valuable metals in wastewater | |
| CN107501963A (en) | A kind of production method of rubber chemicals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100915 |
|
| RJ01 | Rejection of invention patent application after publication |