CN106947509B - A kind of system and method that plastics pyrolytic gasification prepares oil product - Google Patents
A kind of system and method that plastics pyrolytic gasification prepares oil product Download PDFInfo
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- 239000000428 dust Substances 0.000 claims description 20
- 239000002296 pyrolytic carbon Substances 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 18
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Classifications
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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)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The present invention relates to a kind of system and method that plastics pyrolytic gasification prepares oil product.The system comprises no heat carrier heat accumulating type rotating bed and fractionating columns, no heat carrier heat accumulating type rotating bed includes revolving bed pyrolysis oven, heat storage type gas radiation pipe burner, the shell of revolving bed pyrolysis oven is equipped with feed inlet, gas-liquid mixture outlet, discharge port, combustible gas entrance and exhanst gas outlet, gas-liquid mixture outlet is set to the side wall of shell, and the furnace bottom of revolving bed pyrolysis oven is rotatable ring-shaped furnace bottom；Heat storage type gas radiation pipe burner is arranged on the annular furnace wall of the revolving bed pyrolysis furnace shell, heat storage type gas radiation pipe burner includes upper regenerative gas radiant tube and lower regenerative gas radiant tube, is located at the two sides up and down of rotatable ring-shaped furnace bottom.The present invention is heated without heat carrier heat accumulating type rotating bed using radiant tube, and air can be effectively completely cut off, and is reduced the generation of the pernicious gases such as dioxin, is increased the stability and controllability of oil gas product.
Description
Technical field
The invention mainly relates to plastic resource process fields, and in particular to a kind of plastics pyrolytic gasification prepares oil product
System and method.
Background technique
Currently, the energy-consuming in the world is mainly based on the fossil fuels such as coal, oil and natural gas.World energy organization
Prediction 2005 to the year two thousand thirty, global non-renewable energy demand will will increase 55%, and average growth rate per annum 1.8% can not be again
Raw fossil fuel is still the main source of non-renewable energy consumption, accounts for 84% in demand growth total amount.How adjusting and optimizing
Energy consumption structure, Looking For Substitutions Of Oil are the important topics that countries in the world face.
With the development of modern science and technology especially chemical technology, plastic products have occurred in more and more fields and
In daily life, but consequent is tens million of tons of the plastic garbage generated every year.These waste plastics are seriously dirty
Environment is contaminated, influence is all produced on people's lives and production, is known as " white garbage ".How to handle and is used
These waste plastics have become problem concerned by people.
The calorific value of plastics is high in house refuse, and the Harmful ingredient contents such as heavy metal are less, if it is possible to effectively be returned
It receives and utilizes, can be very big contribution to the minimizing of solid waste, recycling, harmlessness disposing.
Processing and utilization to waste plastics, what is used has the methods of regeneration, burial, burning.Regeneration particle legal system must mould
The poor quality of material products；Since the natural degradation speed of plastics is very slow, plastics are stayed in soil and cannot be decomposed for a long time burial method,
Make soil hardening；Incineration method generates the pernicious gases such as HCl, HCN during the burning process, will cause secondary dirt again to ecological environment
Dye.Into after the nineties, researcher is decomposed smashed waste plastics using thermal decomposition method under certain condition, to produce
The products such as gasoline, diesel oil and wax, technique not only can effectively pollution abatement, environment purification, but also have high economic benefit.
Currently, mainly having 4 kinds to the processing mode of waste plastics in rubbish: landfill, burning, material regeneration and chemical recovery.
Landfill method less investment, but a large amount of soil is occupied, and polluted underground water.With landfill place reduction, landfill cost also by
It is cumulative to add；Incineration method can be recycled thermal energy, but when waste plastics burns can generate pollutant, as dust, oxysulfide, nitrogen oxides and
Some other noxious material (such as dioxin) is seriously polluted；The product quality of material regeneration manufacture can be declined, object in container
Product are easy the pollution by waste plastics dirt；Chemical recycling can not only obtain widely used Elementary Chemical Industry raw material and fuel, and
And less pollution, environment benefits and economic gains are obvious.Chemical recycling includes that thermal cracking, gasification, liquid-gas add hydrogen etc., wherein useless modeling
Expect that pyrolysis oil preparation is more promising developing direction, many scholars at home and abroad study this.
Plastics pyrolysis is, by plastic heating to certain temperature, to make the organic matter in plastics under conditions of anaerobic or anoxic
Thermal cracking and thermochemical study reaction occurs, generates H2、CO、CH4The mistake of equal imflammable gas, oil-water mixture and solid product
Journey.Plastics pyrolysis is the new plastics heat chemistry of one kind using disposal technology, and with environmental pollution, small, at low cost, resource high-efficiency is returned
The many merits such as receipts.Pyrolytic process is divided into low temperature pyrogenation (≤500 DEG C) and high temperature pyrolysis.Since high temperature pyrolysis large scale equipment manufactures
Difficulty is big, service requirement is high, and energy consumption is relatively high, and current Research Emphasis both domestic and external is placed on low temperature pyrogenation.Plastics are low
Warm pyrolytic technique can effectively increase the yield of pyrolysis oil.Since reaction temperature is low, dioxin generation area, NO are avoidedxAnd SOx
Generation is also seldom, therefore low temperature pyrogenation technology is relatively effective plastics pyrolysis processing technique.
Plastics pyrolysis is that converting-plastics can be the effective way of fuel oil by one kind, but be limited to energy consumption height, pyrolytic process
The problems such as control is difficult, pyrolytic process poisonous gas leakage is difficult to be widely popularized；The pyrolysis oil of plastics pyrolysis is because of complicated component, pin
Difficulty is sold, economy is lower；Plastics pyrolysis after oil gas need to individually be purified, extraction processing, energy consumption is high, and apparatus and process is multiple
It is miscellaneous.
In addition, the gas that plastics pyrolysis generates has certain calorific value, it is difficult to utilize.Moreover, the heat that plastics pyrolysis generates
Solution charcoal does not find effective processing method yet.
Further more, existing conventional pyrolytic technique, equipment design is complicated, and service requirement is high, easily goes wrong, generates secondary dirt
Dye.
Therefore, for apparatus and process complexity in plastics pyrolytic process, the pyrolysis oil of the poor quality of pyrolysis oil, plastics pyrolysis at
Point complexity, the oil gas after pyrolysis need to be purified individually, extraction processing and pyrolysis gas can not utilize, heat energy recycle
The problems such as low, pyrolytic carbon can not utilize need to provide a kind of cleaning, efficient, energy-efficient plastics method for pyrolysis.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of system and method that plastics pyrolytic gasification prepares oil product, with
Simplify pyrolysis plant and technique, the quality for improving pyrolysis oil, convenient for the oil gas after being pyrolyzed extraction with separate.
The present invention provides a kind of system that plastics pyrolytic gasification prepares oil product, and the system comprises no heat carrier heat accumulating types
Revolving bed and fractionating column, wherein
The no heat carrier heat accumulating type rotating bed includes revolving bed pyrolysis oven, heat storage type gas radiation pipe burner, described
The shell of revolving bed pyrolysis oven is equipped with feed inlet, gas-liquid mixture outlet, discharge port, combustible gas entrance and exhanst gas outlet, institute
The side wall that gas-liquid mixture outlet is set to the shell is stated, the furnace bottom of the revolving bed pyrolysis oven is rotatable ring-shaped furnace bottom；
The heat storage type gas radiation pipe burner is arranged on the annular furnace wall of the revolving bed pyrolysis furnace shell, the heat accumulating type combustion
Gas radiant tube burner includes upper regenerative gas radiant tube and lower regenerative gas radiant tube, is equipped in burner hearth and is installed on furnace
Bottom simultaneously is used to carry the support plate for being pyrolyzed object, and upper regenerative gas radiant tube and lower regenerative gas radiant tube are located at institute
State the two sides up and down of support plate；The fractionating column includes oil and gas import, steam inlet, heavy oil outlet, light oil products outlet, pyrolysis
Gas outlet, the oil and gas import are connected with the outlet of the gas-liquid mixture of the revolving bed pyrolysis oven.
Above-mentioned system, the system also includes fluidized gasification device, the fluidized gasification device is equipped with plastics charcoal
Entrance, gasification agent inlet, the outlet of gasification gas and dedusting ash entrance, the discharging of the plastics charcoal entrance and the revolving bed pyrolysis oven
Mouth is connected.
Above-mentioned system, the system also includes dust separation unit, the dust separation unit be equipped with gasification gas entrance,
Combustible gas outlet and dedusting ash outlet, the gasification of gasification the gas entrance and the fluidized gasification device of the dust separation unit
Gas outlet is connected, and the dedusting ash outlet of the dust separation unit is connected with the dedusting ash entrance of the fluidized gasification device.
Above-mentioned system, the system also includes flammable gas storage tank, the flammable gas storage tank is equipped with combustible gas entrance and can
Gas outlet；The combustible gas outlet of the combustible gas entrance and the dust separation unit is connected, the flammable gas storage tank can
Gas outlet is connected with the combustible gas entrance of the no heat carrier heat accumulating type rotating bed.
The method that plastics pyrolytic gasification prepares oil product is carried out using above system the present invention also provides a kind of, including following
Step:
Plastics are sent into the no heat carrier heat accumulating type rotating bed to be pyrolyzed, when heating makes regenerative gas radiant tube
Heating temperature be lower than lower regenerative gas radiant tube heating temperature, obtain pyrolytic carbon and high-temperature oil gas；
The high-temperature oil gas for generating pyrolysis is discharged from the side gas outlet of the no heat carrier heat accumulating type rotating bed；
High-temperature oil gas after making pyrolysis enters the fractionating column, and fractionation obtains oil product.
Above-mentioned method, the heating temperature of the upper regenerative gas radiant tube are 300-400 DEG C, the lower heat accumulating type combustion
The heating temperature of gas radiant tube is 400-500 DEG C.
Above-mentioned method, the method also includes steps:
The fluidized gasification device is sent into after the pyrolytic carbon that pyrolysis generates is crushed to gasify, and obtains gasification gas.
Above-mentioned method, the method also includes steps: by the gasification gas after dust separation, being sent into combustible gas storage
Tank, then by control gas flow rate, the upper and lower heat accumulating type for making it enter the no heat carrier heat accumulating type rotating bed as fuel fires
In gas radiant tube.
Above-mentioned method, the method also includes steps: the moisture that generation is separated after fractionation is delivered to as gasifying agent
In the fluidized gasification device.
Above-mentioned method, the method also includes steps: the pyrolysis gas that pyrolysis is generated is after alkali cleaning, then mixes described
The gasification gas that fluidized bed plant generates, the regenerative gas radiant tube of the no heat carrier heat accumulating type rotating bed is sent into as fuel
Burner.
Above-mentioned technical proposal according to the present invention, no heat carrier heat accumulating type rotating bed are heated using radiant tube, can be effective
Completely cut off air, reduces the generation of the pernicious gases such as dioxin, increase the stability and controllability of oil gas product.
The present invention is discharged without the oil gas that heat carrier heat accumulating type rotating bed generates from side gas outlet, and oil can be prevented in furnace roof
Second pyrolysis, to increase whole oil yield.
Temperature without regenerative gas radiant tube above and below heat carrier heat accumulating type rotating bed is different, upper regenerative gas radiant tube
Temperature be 300-400 DEG C, the temperature of lower regenerative gas radiant tube is 400-500 DEG C, ensure that the abundant heat of bottom plastics
Solution, improves pyrolysis output of fluid.
The invention enables the oil gas after pyrolysis to be directly entered fractionating column, can make full use of the hot conditions of oil gas itself, pole
Big has saved energy consumption.
The present invention is pyrolyzed the oil generated and forms flexible and changeable product by fractionation, can need to be adjusted according to market.
The combustion gas that the pyrolytic carbon that plastics generate is generated by gasification is together with the pyrolysis gas that pyrolysis generates in radiant tube internal combustion
It burns and is heated for no heat carrier heat accumulating type rotating bed, greatly improve the minimizing and recycling of plastics, can accomplish that fuel is self-sustaining.
Detailed description of the invention
Fig. 1 is that the plastics pyrolytic gasification of the embodiment of the present invention prepares the system flow chart of oil product.
Specific embodiment
Below in conjunction with drawings and examples, a specific embodiment of the invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limiting the invention.
Fig. 1 is that the plastics pyrolytic gasification of embodiment provided by the invention prepares the system flow chart of oil product.
The system that plastics pyrolytic gasification provided by the invention prepares oil product mainly includes no heat carrier heat accumulating type rotating bed
1 and fractionating column 2.
It is sent into after can slightly melting plastics and carries out low temperature pyrogenation reaction without heat carrier heat accumulating type rotating bed 1, generate high temperature
Oil gas (gas-liquid mixture) and pyrolytic carbon.
Wherein, the no heat carrier heat accumulating type rotating bed 1 includes revolving bed pyrolysis oven, the burning of regenerative gas radiant tube
The auxiliary bodies such as device and cloth, discharging.The shell of the revolving bed pyrolysis oven is equipped with feed inlet, gas-liquid mixture exports,
Discharge port, combustible gas entrance and exhanst gas outlet, the gas-liquid mixture outlet are set to the side wall of the shell, the revolving bed heat
The furnace bottom for solving furnace is rotatable ring-shaped furnace bottom.
The heat storage type gas radiation pipe burner is arranged on the annular furnace wall of the revolving bed pyrolysis furnace shell, described
Heat storage type gas radiation pipe burner includes upper regenerative gas radiant tube and lower regenerative gas radiant tube, is equipped in burner hearth
It is installed on furnace bottom and is used to carry the support plate for being pyrolyzed object, specifically, support plate is horizontally disposed and logical in its bottom or side
Vertical supporting muscle connection furnace bottom is crossed, makes have space to keep support plate hanging between support plate and furnace bottom, upper regenerative gas
Radiant tube is located on the upside of support plate and between support plate there is space to be pyrolyzed object to accommodate, lower regenerative gas radiant tube position
In the downside of the support plate；It is pyrolyzed by way of being pyrolyzed object heat source setting up and down to being pyrolyzed object.
Plastics catalytic pyrolysis institute calorific requirement, spoke are provided in a manner of heat radiation combustion fluidized bed gasification gas and pyrolysis gas
The atmosphere isolation in flue gas and revolving bed in pipe is penetrated, revolving bed is in anaerobic state.It is arranged in pyrolysis zone end sidewall of the furnace body
Gas liquid outlet, plastics pyrolysis gas-liquid mixture is discharged.
High-temperature oil gas (gas-liquid mixture) is directly entered fractionating column 2 and generates a variety of oil products, and gas incorporation gasification gas is available
In combustion heat supplying, extra gas can pass through generator combustion power generation.
The fractionating column 2 includes oil and gas import, steam inlet, heavy oil outlet, light oil products outlet, pyrolysis gas outlet, institute
It states oil and gas import to be connected with the outlet of the gas-liquid mixture of the revolving bed pyrolysis oven, centre can be controlled by pump.
The light oil products outlet of fractionating column 2 can be connected with settle and separate tank.The settle and separate tank specifically settable mixing
Liquid entrance, moisture outlet, oil product outlet.The entry to mixed solution of settle and separate tank is connected with the outlet of the light oil products of fractionating column.
The moisture outlet of settle and separate tank can further be connected with the gasification agent inlet of the fluidized gasification device.
The pyrolytic carbon that no heat carrier heat accumulating type rotating bed 1 generates can by being crushed laggard fluidized bed gasification installation, with point
Steam gasification reaction, obtained gasification gas occur for the moisture generated after evaporating.
Broken discharging machine can be used in the pyrolytic carbon discharging of the no heat carrier heat accumulating type rotating bed.The plastics pyrolytic carbon of generation
Fluidized gasification device 3 can be entered using sealing after broken discharging machine is handled.
The fluidized gasification device 3 is equipped with plastics charcoal entrance, gasification agent inlet, the outlet of gasification gas and dedusting ash entrance,
The plastics charcoal entrance is connected with the discharge port of the revolving bed pyrolysis oven.
It can be used for no heat carrier heat accumulating type rotating bed radiant tube combustion heating after gasification gas dedusting.Thus above system may be used also
It further comprise dust separation unit 4, the dust separation unit 4 is equipped with gasification gas entrance, combustible gas outlet and dedusting ash and goes out
Mouthful, the gasification gas entrance of the dust separation unit 4 is connected with the outlet of the gasification gas of the fluidized gasification device 3, described to remove
The dedusting ash outlet of dirt clean unit 4 is connected with the dedusting ash entrance of the fluidized gasification device 3, for returning to dedusting ash
Gasify in fluidized gasification device 3.
Further, system may also include flammable gas storage tank 5, and the flammable gas storage tank 5 is equipped with combustible gas entrance and flammable
Gas outlet.The combustible gas outlet of the combustible gas entrance and the dust separation unit 4 is connected, the flammable gas storage tank 5 can
Gas outlet can be connected with the combustible gas entrance of the no heat carrier heat accumulating type rotating bed 1.
If plastics to be processed are more open, using the waste heat in recycling product and flue gas by its appropriate thawing to increase
Material speed is added.Therefore, system can also further comprise thawing apparatus.
The thawing apparatus has feed inlet, discharge port, gas inlet, exhaust outlet, and the feed inlet of the thawing apparatus can
It is connected with screw-feeder, the discharge port of the thawing apparatus can be connected with the feed inlet of no heat carrier heat accumulating type rotating bed 1, institute
The gas inlet for stating thawing apparatus can be connected with the exhanst gas outlet of no heat carrier heat accumulating type rotating bed 1.
The method that the present invention specific implementation plastics pyrolytic gasification prepares oil product, technical process is:
It is sent into (if necessary) after plastics are slightly melted and carries out low temperature pyrogenation reaction without heat carrier heat accumulating type rotating bed 1,
Generate high-temperature oil gas (gas-liquid mixture) and pyrolytic carbon.Pyrolytic carbon can by being crushed laggard fluidized bed gasification installation 3, can with it is rear
Steam gasification reaction occurs for the moisture that continuous fractionation process generates, and revolves after obtained gasification gas dedusting for no heat carrier heat accumulating type
The combustion heating of 1 radiant tube of rotated bed.High-temperature oil gas (gas-liquid mixture) is directly entered fractionating column 2 and generates a variety of oil products, gas
Incorporation gasification gas after-combustion heat supply, extra gas pass through generator combustion power generation.
Entire process flow of the invention realizes making full use of for plastics pyrolysis product, and system is simple, and pyrolysis does not generate
Dioxin, secondary pollution are small, make full use of the heat of pyrolysis oil gas itself to be fractionated, operating cost is low, heat recovery
The industrial applications that rate is high, the horizontal height of recycling, product economy is profitable, is pyrolyzed conducive to plastics.
The method that plastics pyrolytic gasification of the invention prepares oil product, comprising steps of
A, pan feeding: the pan feeding of plastic product is impure less, and moisture content is also relatively low, can direct feeding after simple process.
If plastics are more open, using the waste heat in recycling product and flue gas by its appropriate thawing to increase pan feeding speed.
B, the catalytic pyrolysis of plastics: plastics are uniformly distributed into no heat carrier heat accumulating type rotating bed by distribution device and carry out heat
Solution, is located at plastics among upper and lower regenerative gas radiant tube, and heat storage type gas radiation pipe burner is arranged in annular furnace wall, leads to
It crosses combustion fluidized bed gasification gas and pyrolysis gas provides plastics catalytic pyrolysis institute calorific requirement, the cigarette in radiant tube in a manner of heat radiation
Atmosphere in gas and revolving bed completely cuts off, and revolving bed is in anaerobic state.Gas liquid outlet is set in pyrolysis zone end sidewall of the furnace body, is used
Plastics pyrolysis gas-liquid mixture is discharged.
Upper regenerative gas radiant tube temperature is set as 300-400 DEG C, and lower regenerative gas radiant tube temperature is set as
400-500℃.The present invention is conducive to plastics uniform heat by the way of the temperature for properly increasing lower regenerative gas radiant tube
Solution, thermal decomposition product property are stablized.Upper regenerative gas radiant tube sets lower temperature to increase the yield of oil product as far as possible.
And side gas outlet of the invention is also for the yield for increasing oil product as much as possible, and it is oily in furnace roof to prevent
Second pyrolysis, to increase whole oil yield.
The plastics pyrolytic carbon of generation carries out handling laggard fluidized bed gasification installation 3 using broken discharging machine is sealed, and guarantees
The charging stability of fluidized bed, reduces parking, frequency of maintenance, broken pyrolytic carbon is more conducive to the progress of gasification reaction.
C, prepared by oil product: the high-temperature oil gas (gas-liquid mixed flowed out from no heat carrier heat accumulating type rotating bed pyrolysis furnace sidewall
Object) it is directly entered fractionating column 2, a variety of oil products are formed after fractionation, specific cut point and product quantity are set as needed
It sets.Pyrolysis gas mixes fluidized gasification gas as revolving bed radiant tube fuel after alkali cleaning, also can be used as product sale or straight
Sending and receiving electricity, the oil product after fractionation can be purified by extraction, can be separated grease by liquid distributing device, the water of generation
It can be used as the gasifying agent of gasification furnace or be heated to be steam and be supplied to fractionating column 2.
D, the moisture that fractionation and settle and separate generate fluidized bed steam gasification: is passed through into pipeline to fluidized gasification
In device 3, steam gasification occurs with the pyrolytic carbon from no heat carrier heat accumulating type rotating bed 1 and reacts, " waste water " is become into " gas
Agent " not only reduces operating cost, but also improves the yield of combustible gas, while the residue for generation of gasifying can carry out landfill disposal.
After gasification gas can be using dust separation unit 4, into flammable gas storage tank 5, by controlling gas flow rate, into nothing
Combustion heating in the upper and lower regenerative gas radiant tube of heat carrier heat accumulating type rotating bed 1, the flue gas after burning can be passed through thawing dress
It sets, exhaust gas is discharged after treatment.
Certainly the sequence of above-mentioned steps is not determining, can be set as needed.It is all necessary that the step of mentioning, which is also not,
, it can increase and decrease according to the actual situation.
Of the invention revolving bed is heated using radiant tube compared with prior art, can effectively completely cut off air, is reduced two and is disliked
The generation of the pernicious gases such as English increases the stability and controllability of oil gas product.
The oil gas that revolving bed of the invention generates is discharged from side gas outlet, can prevent the oily second pyrolysis in furnace roof, from
And increase whole oil yield.
Temperature of the present invention without regenerative gas radiant tube above and below heat carrier heat accumulating type rotating bed is different, upper regenerative gas
The temperature of radiant tube is 300-400 DEG C, and the temperature of lower regenerative gas radiant tube is 400-500 DEG C, ensure that bottom plastics
Sufficiently pyrolysis, improves pyrolysis output of fluid.
High-temperature oil gas after present invention pyrolysis is directly entered fractionating column, can make full use of the hot conditions of oil gas itself, pole
The earth has saved energy consumption.
The present invention also can be used system flue gas and waste heat and plastics carried out with preliminary thawing, it is possible to reduce the heap of plastics is close
Degree, and pan feeding can be facilitated, uniform fabric thickness is formed in furnace body.
The oil of generation after present invention pyrolysis forms flexible and changeable product by fractionation, can be adjusted according to market
Section, economy with higher.
Further, the pyrolytic carbon that the present invention generates plastics is by gasification, and the combustion gas of generation is together with pyrolysis gas in spoke
Combustion inner pipe is penetrated as revolving bed heating, the minimizing and recycling of plastics is greatly improved, can accomplish that fuel is self-sustaining.
Embodiment 1
The plastic raw materials that city sub-elects using certain city, plastics kind mainly have polyethylene (PE), polypropylene (PP), polyphenyl
Ethylene (PS), polyvinyl chloride (PVC) and polyethylene terephthalate (PET) etc..
Plastics are being pyrolyzed after tentatively melting into no heat carrier heat accumulating type rotating bed 1, upper regenerative gas spoke
Penetrate 400 DEG C of pipe set temperature, lower 500 DEG C of regenerative gas radiant tube set temperature.The pyrolytic carbon that revolving bed is pyrolyzed passes through
It is crushed laggard fluidized bed gasification installation 3, steam gasification occurs with the moisture that knockout drum generates and reacts, reaction temperature is
800-900 DEG C, gasification gas obtained enters combustible gas storage tank 5 after dust separation unit 4, is by controlling combustible gas flow velocity
No 1 radiant tube of heat carrier heat accumulating type rotating bed heating.The gas-liquid mixture that revolving bed is pyrolyzed passes through sidewall of the furnace body delivery line
It is pumped into 2 rectifying of fractionating column separation, the gasoline for respectively obtaining initial boiling point to 205 DEG C, 205~350 DEG C and 350 DEG C or more evaporates
Divide, diesel oil distillate and heavy oil, pyrolysis gas are sent into flammable gas storage tank 5.
The part physical property of 1 drippolene of table and diesel oil
In order to investigate cracking oil product in light-weight fuel oil, gasoline and diesel oil quality, to the main physical property in their part into
Measurement is gone, measurement result is shown in Table 1.As can be seen from the table, the gasoline obtained through catalytic pyrolysis has very high octane number, surpasses
90 are crossed, can be used as 90# motor petrol after suitably refining.Obtained cold filter point of diesel oil is higher, but can be used as the tune of 0# diesel oil
And component.
Embodiment 2
The plastic raw materials that city sub-elects using certain city, plastics kind mainly have polyethylene (PE), polypropylene (PP), polyphenyl
Ethylene (PS) and polyvinyl chloride (PVC) etc..
Using catalytic pyrolysis, waste plastics, base oil, modeling is added after reaching certain temperature in the activated catalyst first in furnace body
Material is pyrolyzed after thawing into no heat carrier heat accumulating type rotating bed 1, and upper 350 DEG C of regenerative gas radiant tube set temperature,
Lower 450 DEG C of regenerative gas radiant tube set temperature, it is pyrolyzed 45min.The pyrolytic carbon that revolving bed is pyrolyzed is laggard by being crushed
Fluidized bed gasification installation 3, gasification gas obtained enter combustible gas storage tank 5 after dust separation unit 4.Revolving bed is pyrolyzed to obtain
To gas-liquid mixture by sidewall of the furnace body delivery line be pumped into 2 rectifying of fractionating column separation, respectively obtain gasoline fraction, bavin
Oil distillate and heavy oil, pyrolysis gas are sent into flammable gas storage tank 5.
The material balance table of the present embodiment is shown in Table 2.
2 material balance table of table
Cracking Light high income, good product quality, gasoline can be used directly as 90# unleaded gas.
Embodiment 3
The plastic raw materials that city sub-elects using certain city, plastics kind mainly have polyethylene (PE), polypropylene (PP), polyphenyl
Ethylene (PS) and polyvinyl chloride (PVC) etc..
Using catalytic pyrolysis, waste plastics, base oil, modeling is added after reaching certain temperature in the activated catalyst first in furnace body
Material is pyrolyzed after thawing into no heat carrier heat accumulating type rotating bed 1, and upper 300 DEG C of regenerative gas radiant tube set temperature,
Lower 400 DEG C of regenerative gas radiant tube set temperature, it is pyrolyzed 45min.The pyrolytic carbon that revolving bed is pyrolyzed is laggard by being crushed
Fluidized bed gasification installation 3, gasification gas obtained enter combustible gas storage tank 5 after dust separation unit 4.Revolving bed is pyrolyzed to obtain
To gas-liquid mixture by sidewall of the furnace body delivery line be pumped into 2 rectifying of fractionating column separation, respectively obtain gasoline fraction, bavin
Oil distillate and heavy oil, pyrolysis gas are sent into flammable gas storage tank 5.
The material balance table of the present embodiment is shown in Table 3.
3 material balance table of table
Cracking Light high income, good product quality, gasoline can be used directly as 90# unleaded gas.
Finally, it should be noted that obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out are still in the protection scope of this invention.
Claims (10)
1. a kind of system that plastics pyrolytic gasification prepares oil product, the system comprises no heat carrier heat accumulating type rotating bed and fractionation
Tower, wherein
The no heat carrier heat accumulating type rotating bed includes revolving bed pyrolysis oven, heat storage type gas radiation pipe burner,
The shell of the revolving bed pyrolysis oven is equipped with feed inlet, gas-liquid mixture outlet, discharge port, combustible gas entrance and flue gas
Outlet, the gas-liquid mixture outlet are set to the side wall of the shell, and the furnace bottom of the revolving bed pyrolysis oven is rotatable ring
Shape furnace bottom；
The heat storage type gas radiation pipe burner is arranged on the annular furnace wall of the revolving bed pyrolysis furnace shell, the accumulation of heat
Formula fired-gas radiant tube combustor includes upper regenerative gas radiant tube and lower regenerative gas radiant tube, and installation is equipped in burner hearth
In furnace bottom and for carrying the support plate for being pyrolyzed object, the support plate is horizontally disposed and logical in the support plate bottom or side
It crosses vertical supporting muscle and connects the furnace bottom, keep the support plate hanging, upper regenerative gas radiant tube and lower regenerative gas spoke
Penetrate the two sides up and down that pipe is located at the support plate；
The fractionating column includes oil and gas import, steam inlet, heavy oil outlet, light oil products outlet, pyrolysis gas outlet, the oil gas
Import is connected with the outlet of the gas-liquid mixture of the revolving bed pyrolysis oven.
2. system according to claim 1, which is characterized in that the system also includes fluidized gasification device, the stream
Change bed gasifying apparatus be equipped with plastics charcoal entrance, gasification agent inlet, gasification gas outlet and dedusting ash entrance, the plastics charcoal entrance with
The discharge port of the revolving bed pyrolysis oven is connected.
3. system according to claim 2, which is characterized in that the system also includes dust separation unit, the dedusting
Clean unit be equipped with gasification gas entrance, combustible gas outlet and dedusting ash outlet, the gasification gas entrance of the dust separation unit with
The gasification gas outlet of the fluidized gasification device is connected, dedusting ash outlet and the fluidized bed gas of the dust separation unit
Disguise the dedusting ash entrance set to be connected.
4. system according to claim 3, which is characterized in that the system also includes flammable gas storage tank, the combustible gas
Storage tank is equipped with combustible gas entrance and combustible gas exports；The combustible gas of the combustible gas entrance and the dust separation unit exports phase
Even, the combustible gas outlet of the flammable gas storage tank is connected with the combustible gas entrance of the no heat carrier heat accumulating type rotating bed.
5. a kind of method for preparing oil product using any one of the Claims 1-4 4 system progress plastics pyrolytic gasification, including
Following steps:
Plastics are sent into the no heat carrier heat accumulating type rotating bed to be pyrolyzed, when heating make regenerative gas radiant tube plus
Hot temperature is lower than the heating temperature of lower regenerative gas radiant tube, obtains pyrolytic carbon and high-temperature oil gas；
The high-temperature oil gas for generating pyrolysis is discharged from the side gas outlet of the no heat carrier heat accumulating type rotating bed；
High-temperature oil gas after making pyrolysis enters the fractionating column, and fractionation obtains oil product.
6. according to the method described in claim 5, it is characterized in that, the heating temperature of the upper regenerative gas radiant tube is
300-400 DEG C, the heating temperature of the lower regenerative gas radiant tube is 400-500 DEG C.
7. according to the method described in claim 5, it is characterized in that, the method also includes steps:
The fluidized gasification device is sent into after the pyrolytic carbon that pyrolysis generates is crushed to gasify, and obtains gasification gas.
8. the method according to the description of claim 7 is characterized in that the method also includes steps: the gasification gas is passed through
After dust separation, it is sent into flammable gas storage tank, then by control gas flow rate, it is made to enter the no heat carrier accumulation of heat as fuel
In the upper and lower regenerative gas radiant tube of formula revolving bed.
9. according to the method described in claim 5, it is characterized in that, the method also includes steps: being generated being separated after fractionation
Moisture be delivered in the fluidized gasification device as gasifying agent.
10. the method according to the description of claim 7 is characterized in that the method also includes steps: the pyrolysis that pyrolysis is generated
Gas is after alkali cleaning, then mixes the gasification gas that the fluidized bed plant generates, and is sent into the no heat carrier heat accumulating type as fuel
The heat storage type gas radiation pipe burner of revolving bed.
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| CN109705888A (en) * | 2019-01-16 | 2019-05-03 | 武汉博立达农业科技发展有限公司 | Heat accumulating type rotating bed |
| US11447576B2 (en) | 2019-02-04 | 2022-09-20 | Eastman Chemical Company | Cellulose ester compositions derived from recycled plastic content syngas |
| US11286436B2 (en) | 2019-02-04 | 2022-03-29 | Eastman Chemical Company | Feed location for gasification of plastics and solid fossil fuels |
| US11939406B2 (en) | 2019-03-29 | 2024-03-26 | Eastman Chemical Company | Polymers, articles, and chemicals made from densified textile derived syngas |
| CN112708472B (en) * | 2019-10-25 | 2022-11-01 | 中国石油化工股份有限公司 | Combined biomass gasification device and biomass gasification method |
| CN112342063A (en) * | 2020-10-28 | 2021-02-09 | 华中科技大学 | Method for promoting plastic gasification through wet sludge pyrolysis, and combustible gas preparation method and system |
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