CN104774632A - Method for producing coke by replacing part of coal with waste plastics - Google Patents
Method for producing coke by replacing part of coal with waste plastics Download PDFInfo
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- CN104774632A CN104774632A CN201410016119.8A CN201410016119A CN104774632A CN 104774632 A CN104774632 A CN 104774632A CN 201410016119 A CN201410016119 A CN 201410016119A CN 104774632 A CN104774632 A CN 104774632A
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- coke
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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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
- 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
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- Chemical & Material Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Processing Of Solid Wastes (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a method for producing coke by replacing a part of coal with waste plastics, wherein the method includes the following steps: (1) heating and co-melting asphalt, the waste plastics and tar residues at the temperature of 125-135 DEG C, completely melting for 5 min, and stopping heating; (2) cooling to 20-30 DEG C, then crushing into particles with the particle size of 4 mm or less, adding mixed coal, fully mixing, adding into a crusher, crushing, and thus obtaining a mixed material with the particle size of 1 mm or less after crushing; (3) adding the mixed material into a coke oven, heating to 1050 DEG C, then stopping heating, maintaining the oven temperature for 3 h, carrying out pyrolysis into coke, and cooling the generated coke by a coke dry quenching way. Co-carbonization of the waste plastics and the coking coal provides an effective method for utilization of the waste plastics, environmental pollution of the waste plastics is reduced, at the same time, a part of replacing raw material is provided for the shortage of coking coal resources, and the good economic benefits and environment benefits are provided.
Description
Technical field
The present invention relates to coal high temperature pyrolysis coke and waste or used plastics comprehensive utilization technique, be specifically related to a kind of method utilizing waste or used plastics Substitute For Partial coal to produce coke.
Background technology
Because of the fast development of economic construction, plastics industry is swift and violent.Processing and use after plastics grow with each passing day .2010 world market plastics output break through 2.5 hundred million t.And China has also become genuine plastics-production, consumption and import big country.Due to erosion resistance, resistance physical property, the ageing resistance of plastics itself, be present in occurring in nature for a long time and difficult degradation, cause serious " white pollution "." white pollution " that waste or used plastics produces is not only an environmental problem, especially a social concern.Environmental issue is the subject matter of restriction development of iron and steel enterprises all the time, and therefore reducing the pollution of self and strengthen self improvement, is the condition that iron and steel enterprise depends on for existence and development.If but can contribute for overall environment protection and improvement, more can give security for steel industry group. simultaneouslyThe treatment process of current most of waste or used plastics is the method for burying or combustion method, but these 2 kinds of methods existence take a large amount of soil, cause serious secondary pollution etc. to be difficult to the problem overcome.Waste or used plastics thermolysis is utilized to produce gasoline, technology (the CN97108253.7 of diesel oil, CN200610141363.2, CN200810225614.4), also waste or used plastics is utilized to produce light concrete construction material (CN98124978.7), also be processed into derivatived fuel (RDF) combustion energy and utilize technology (CN201010186399.9), also have other chemical treatment methods in addition, as coating processed, paint, tamanori etc.
Along with expanding economy, China's hot metal output is more than 800,000,000 tons, and this STRENGTH ON COKE consumption proposes great demand, but continually developing along with coal resource, non-renewable due to coal resource, and coking coal resource is fewer and feweri.
Waste or used plastics and coal is utilized to carry out co-carbonization process, not only solve the environmental problem of " white pollution ", but also overcome the defect of traditional waste or used plastics treating processes, decrease environmental stress, the generation and the gas that fundamentally eliminate the obnoxious flavour that waste or used plastics and burning bring carry out the possibility of directly discharge without process, thus " Greenhouse effect " and the hydrogenchloride of the Global warming that direct discharge of burning the carbonic acid gas produced brings can be alleviated, the pollution etc. of the carcinogenss such as dioxin (dioxin) and heavy metal, there is good environmental benefit, also alleviating coking coal resource consumption to a certain extent lacks brought pressure simultaneously.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of novel method utilizing waste or used plastics Substitute For Partial coal to produce coke.The object of the invention is for waste or used plastics intractability and environmental contamination, propose a kind of waste or used plastics that utilizes and carry out as coking coal resource and coal the method that co-carbonization prepares good coke, effectively process white pollution waste or used plastics, simultaneously to the shortage of coking coal resource, have found a kind of material of Some substitute coking coal, be conducive to alleviating the short pressure brought of coking coal resource, there is good environmental benefit simultaneously.
In order to solve the problem, technical scheme of the present invention is:
Utilize waste or used plastics Substitute For Partial coal to produce a method for coke, it comprises the steps:
(1) pitch, waste or used plastics and coke tar refuse are heated congruent melting at 125-135 DEG C of temperature, completely after fusing, after 5min, stop heating;
(2) be crushed to the particle of granularity at below 4mm after being cooled to 20-30 DEG C, add mixed coal and fully mix, add in pulverizer and pulverize, after pulverizing, obtain the mixture of granularity at below 1mm;
(3) add in coke oven by mixture, stop heating keeping furnace temperature 3h pyrolysis coke after being heated to 1050 DEG C, the coke of generation utilizes dry coke quenching mode to cool.
Preferably,
The total mass of described pitch, waste or used plastics and coke tar refuse is the 5-8% of mixed coal quality.
The mass ratio of described waste or used plastics and described pitch is 1:6-3:4.
The mass ratio of described coke tar refuse and described pitch is 4%-8%.
Described mixed coal is Ad=8-10%, VM
d=24-27%.Ad represents pit ash, and VMd represents the volatile matter of coal.
In the present invention,
Described coke tar refuse refers to that, by the isolated solid residue of tar ammonia clarifying tank, main component is heavy tar, coal dust and dust etc.The plastics that described waste or used plastics is discarded after referring to and using, are preferably polypropylene, polyvinyl chloride, polystyrene etc.The granularity of described waste or used plastics is less than 2mm.
Described pitch is mid-temperature pitch, and the ring and ball softening point of pitch is 75-98 DEG C.
Described coke oven is 40kg small coke oven.
Heating described in step (3), mode is be heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min.
Dry coke quenching mode described in step (3) is cooled to and utilizes nitrogen in enclosed space, carry out heat exchange with coke thus impel coke to cool.
Compared with prior art, the beneficial effect utilizing waste or used plastics Substitute For Partial coal to produce the method for coke of the present invention is:
In the present invention, owing to having carried out congruent melting process to waste or used plastics, coke tar refuse and pitch, waste or used plastics, coke tar refuse and pitch occur when congruent melting cracking, polymerization and and copolymerization, waste or used plastics and the more uniform same pitch of coke tar refuse warm, this obviates the interpolation of plastics and the coking segregation problems caused.Participate in the Co carbonization process with coal by pitch, coke tar refuse, pitch serves the effect of buffer carrier, decrease the melting contracting body of waste or used plastics when carbonizing, coke tar refuse serves the effect increasing coke strenth, therefore avoid the formation of a large amount of cavity and hole, thus improve the quality of coke.
Utilize waste or used plastics and coking coal carry out Co carbonization for reuse of waste plastics proposes a kind of effective ways, decrease the environmental pollution of waste or used plastics, simultaneously for the shortage of coking coal resource provides Some substitute raw material, there is good economic benefit and environmental benefit.
Embodiment
Below in conjunction with embodiment, the method utilizing waste or used plastics Substitute For Partial coal to produce coke of the present invention is described in further detail.
Embodiment 1
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 125 DEG C, in the process of heating, add granularity be less than 2mm waste and old polypropylene granulated plastic, the mass ratio of waste and old polypropylene granulated plastic and pitch is 1:6, add simultaneously account for pitch weight 4% coke tar refuse, stir while add, keep being cooled to after 5min 20 DEG C until completely melted and be crushed to granularity and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 5%, and the composition of mixed coal is Ad=8%, VMd=24%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40(coke shatter strength) be 79.19%, M10(coke abrasive wear resistance) be 7.72%, CRI(coke reactivity) be 38.73%, CSR(postreaction strength of coke) be 47.43%.
Embodiment 2
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 130 DEG C, in the process of heating, add granularity be less than 2mm waste polyvinyl chloride granulated plastic, the mass ratio of waste polyvinyl chloride granulated plastic and pitch is 2:5, add simultaneously account for pitch weight 5% coke tar refuse, stir while add, be crushed to granularity after being cooled to 25 DEG C after keeping 5min until completely melted and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 7%, and the composition of mixed coal is Ad=9%, VMd=25%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 73.28%, M10 be 7.37%, CRI be 37.8%, CSR is 46.54%.
Embodiment 3
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 130 DEG C, in the process of heating, add granularity be less than 2mm waste and old polystyrol granulated plastic, the mass ratio of waste and old polystyrol granulated plastic and pitch is 2:5, add simultaneously account for pitch weight 7% coke tar refuse, stir while add, be crushed to granularity after being cooled to 30 DEG C after keeping 5min until completely melted and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 7%, and the composition of mixed coal is Ad=10%, VMd=26%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Added by material after pulverizing in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke after being heated to 1050 DEG C under the heat-up rate of 2.5 DEG C/min, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 77.64%, M10 be 6.65%, CRI be 39.11%, CSR is 47.25%.
Embodiment 4
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 135 DEG C, in the process of heating, add granularity be less than 2mm waste and old polystyrol granulated plastic, the mass ratio of waste and old polystyrol granulated plastic and pitch is 3:4, add simultaneously account for pitch weight 8% coke tar refuse, stir while add, be crushed to granularity after being cooled to 30 DEG C after keeping 5min until completely melted and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 8%, and the composition of mixed coal is Ad=10%, VMd=27%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 74.13%, M10 be 8.04%, CRI be 35.6%, CSR is 54.58%.
Comparative example 1
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 135 DEG C, in the process of heating, add granularity be less than the waste and old polyoxymethylene granulated plastic of 2mm, the mass ratio of waste and old polyoxymethylene granulated plastic and pitch is 3:4, add simultaneously account for pitch weight 8% coke tar refuse, stir while add, be crushed to granularity after being cooled to 30 DEG C after keeping 5min until completely melted and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal part by weight 8%, and the composition of mixed coal is Ad=10%, VMd=27%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 64.13%, M10 be 15.04%, CRI be 45.6%, CSR is 44.58%.
Comparative example 2
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 135 DEG C, in the process of heating, add granularity be less than 2mm waste polyvinyl chloride granulated plastic, the mass ratio of waste polyvinyl chloride granulated plastic and pitch is 3:4, add simultaneously account for pitch weight 8% coke tar refuse, stir while add, be crushed to granularity after being cooled to 30 DEG C after keeping 5min until completely melted and be less than 4mm.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight mass ratio 8%, and the composition of mixed coal is Ad=17%, VMd=20%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 54.13%, M10 be 25.04%, CRI be 43.6%, CSR is 40.58%.
Comparative example 3
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 125 DEG C, in the process of heating, add granularity be less than 2mm waste and old polypropylene granulated plastic, the mass ratio of waste and old polypropylene granulated plastic and pitch is 1:6, abundant stirring, is crushed to granularity after being cooled to 20 DEG C and is less than 4mm after keeping 5min until completely melted.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 5%, and the composition of mixed coal is Ad=8%, VMd=24%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40(coke shatter strength) be 65.19%, M10(coke abrasive wear resistance) be 13.55%, CRI(coke reactivity) be 48.93%, CSR(postreaction strength of coke) be 37.22%.
Comparative example 4
Mid-temperature pitch from Shanghai Ming Tong roadbed material company limited is slowly heated to 130 DEG C, in the process of heating, add granularity be less than 2mm waste polyvinyl chloride granulated plastic, the mass ratio of waste polyvinyl chloride granulated plastic and pitch is 2:5, abundant stirring, is crushed to granularity after being cooled to 25 DEG C and is less than 4mm after keeping 5min until completely melted.Mixture after process is added granularity be less than in the mixed coal of 6mm according to accounting for mixed coal weight ratio 7%, and the composition of mixed coal is Ad=9%, VMd=25%.Add in pulverizer after abundant mixing and pulverize, the raw meal particle size after pulverizing is less than 1mm.Being added by material after pulverizing after being heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min in 40kg small coke oven stops heating keeping furnace temperature 3h pyrolysis to generate coke, and dry coke quenching mode cools.Detecting coke quality index is: M40 is 62.57%, M10 be 14.09%, CRI be 39.6%, CSR is 48.52%.
Above embodiment is only the illustrative embodiments of invention, can not be used for limiting the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, these are revised or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (8)
1. utilize waste or used plastics Substitute For Partial coal to produce a method for coke, it is characterized in that, the method comprises the following steps:
(1) pitch, waste or used plastics and coke tar refuse are heated congruent melting at 125-135 DEG C of temperature, melt completely, after 5min, stop heating;
(2) be crushed to the particle of granularity at below 4mm after being cooled to 20-30 DEG C, add mixed coal and fully mix, add in pulverizer and pulverize, after pulverizing, obtain the mixture of granularity at below 1mm;
(3) add in coke oven by mixture, stop heating keeping furnace temperature 3h pyrolysis coke after being heated to 1050 DEG C, the coke of generation utilizes dry coke quenching mode to cool.
2. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: described pitch is mid-temperature pitch.
3. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: described waste or used plastics is the one in polypropylene, polyvinyl chloride, polystyrene.
4. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: the method for the heating described in step (3) is heated to 1050 DEG C with the heat-up rate of 2.5 DEG C/min.
5. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: the total mass of described pitch, waste or used plastics and coke tar refuse is the 5-8% of mixed coal quality.
6. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: the mass ratio of described waste or used plastics and described pitch is 1:6-3:4.
7. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: the mass ratio of described coke tar refuse and described pitch is 4%-8%.
8. the method utilizing waste or used plastics Substitute For Partial coal to produce coke according to claim 1, is characterized in that: described mixed coal is A
d=8-10%, VMd=24-27%.
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| CN109135765A (en) * | 2018-08-17 | 2019-01-04 | 沂州科技有限公司 | coke and preparation method thereof |
| CN113717743A (en) * | 2021-09-14 | 2021-11-30 | 北京旭阳科技有限公司 | Composite coke modifier and its prepn and use |
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