CN109096535A - A kind of waste plastic hydrothermal treatment device and method - Google Patents
A kind of waste plastic hydrothermal treatment device and method Download PDFInfo
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- CN109096535A CN109096535A CN201811051313.4A CN201811051313A CN109096535A CN 109096535 A CN109096535 A CN 109096535A CN 201811051313 A CN201811051313 A CN 201811051313A CN 109096535 A CN109096535 A CN 109096535A
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- waste plastic
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- heating
- hydrothermal oxidization
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- 239000004033 plastic Substances 0.000 title claims abstract description 77
- 229920003023 plastic Polymers 0.000 title claims abstract description 77
- 239000002699 waste material Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010335 hydrothermal treatment Methods 0.000 title claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 96
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 55
- 238000005086 pumping Methods 0.000 claims abstract description 54
- 230000007062 hydrolysis Effects 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 239000007800 oxidant agent Substances 0.000 claims abstract description 25
- 230000001590 oxidative effect Effects 0.000 claims abstract description 25
- 238000006731 degradation reaction Methods 0.000 claims abstract description 21
- 230000015556 catabolic process Effects 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000012452 mother liquor Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000004615 ingredient Substances 0.000 claims abstract description 15
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 35
- 239000003054 catalyst Substances 0.000 claims description 24
- 230000006837 decompression Effects 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 15
- 239000000047 product Substances 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 11
- 125000004122 cyclic group Chemical group 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 3
- 239000000413 hydrolysate Substances 0.000 claims description 3
- 239000010413 mother solution Substances 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007857 degradation product Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- -1 timber Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/14—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with steam or water
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/30—Polymeric waste or recycled polymer
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of waste plastic hydrothermal treatment device and methods, comprising: hydrothermal oxidization system is configured to carry out partial oxidation reaction to waste plastic；Highly pressured hydrolysis system is configured to further hydrolyze the product after the reaction of hydrothermal oxidization system oxidation；Waste plastic crushing system is configured to crush waste plastic and be transported in hydrothermal oxidization system；Ingredient pumping system is configured to the ingredient of water and mother liquor being pumped into the first pre-heating system from the first high-pressure pumping system, is transported in hydrothermal oxidization system after preheated；Oxidant pumping system is configured to oxidant being pumped into the second pre-heating system from the second high-pressure pumping system, is transported in hydrothermal oxidization system after preheated；The present invention successively carries out the device and method of partial oxidation and hydrolysis process under high-temperature and high-pressure conditions using water as degradation reagent, and waste plastic can be made to realize degradation treatment in relatively simple hydrothermal system.
Description
Technical field
The present invention relates to a kind of waste plastic hydrothermal treatment device and methods more particularly to waste plastic in high temperature and pressure item
The device and processing method being hydrolyzed after partial oxidation under part, belong to field of environment protection.
Background technique
High molecule plastic is largely used to replace the traditional materials such as metal, timber, paper, ceramics due to its excellent properties,
Applied to national economy and the every field of production and living.Currently, the volumetric production of global plastics oneself be substantially more than steel, at
For one of the main Types of Material Field.China is plastics-production and consumption big country, and Apparent con- sumption occupies the second in the world, every year
Growth rate is up to 12.3%.With the extensive use of plastic product, generated waste plastic brings ecological environment and human survival
Serious influence and a variety of potentially hazardous.
Waste plastic is derived from valuable petroleum resources, energy and chemical utilization value with higher.If from sustainable
The angle of development carries out resource utilization utilization to waste plastic, not only can solve waste plastic since its refractory organics is to life
State environment bring baneful influence, and the raw material and energy expended needed for producing these high molecular materials again is greatly saved
Amount alleviates social pressures.But since waste plastic is many kinds of, complicated component, and still shortcoming is effectively treated it at present
And the universality technology of resource utilization, so causing waste plastic recovery utilization rate low.
Using organic reagents such as methanol, ethyl alcohol, amine (ammonia), benzene,toluene,xylene, tetrahydrofuran, dihydric alcohols as molten
Waste plastic can effectively be degraded under high-temperature and high-pressure conditions, obtain the small molecule with potential utility value by agent
Close object.But since such reagent cost is higher, and itself has certain environmental hazard, such as benzene,toluene,xylene, four
The organic reagents such as hydrogen furans are just important environmental pollutants.Further, since waste plastic complicated component, the product after degradation
Also the situation that many kinds of substance coexists is presented, and these substances will likely interact with degradation reagent used, give catabolite
Isolate and purify and increase difficulty.In recent years, the water conduct under high-temperature and high-pressure conditions with specific physical chemical property
Green reagent gradually attracts people's attention, but how the water under high-temperature and high-pressure conditions is reasonably applied to the drop of waste plastic
Solution processing and resource utilization it is still necessary to will deeper into research.
Summary of the invention
The technical problem to be solved by the present invention is provide a kind of waste plastic under high-temperature and high-pressure conditions using water as drop
Solution reagent successively carries out the device and method of partial oxidation and hydrolysis process, makes waste plastic in relatively simple hydrothermal system
Degradation treatment is realized, to solve the shortcomings of the prior art.
The technical scheme is that a kind of waste plastic hydrothermal treatment device, comprising:
Hydrothermal oxidization system is configured to carry out partial oxidation reaction to waste plastic；
Highly pressured hydrolysis system, feed inlet are connected to the discharge port of hydrothermal oxidization system, are configured to through hydrothermal oxidization system oxygen
Product after changing reaction is further hydrolyzed；
Waste plastic crushing system is connected to the feed inlet of hydrothermal oxidization system, is configured to that waste plastic is crushed and conveyed
Into hydrothermal oxidization system；
Ingredient pumping system, including the first high-pressure pumping system and the first pre-heating system, the first high-pressure pumping system and first is in advance
Hot systems connection, the first pre-heating system is connected with the feed inlet of hydrothermal oxidization system, is configured to the ingredient of water and mother liquor from the
One high-pressure pumping system is pumped into the first pre-heating system, is transported in hydrothermal oxidization system after preheated；
Oxidant pumping system, including the second high-pressure pumping system and the second pre-heating system, the second high-pressure pumping system and second
Pre-heating system connection, the second pre-heating system is connected with the feed inlet of hydrothermal oxidization system, is configured to oxidant from the second high pressure
Pumping system is pumped into the second pre-heating system, is transported in hydrothermal oxidization system after preheated.
It further include decompression separation system, the discharge port of the feed end of the decompression separation system and the highly pressured hydrolysis system
Connection, suitable for the product at reduced pressure after hydrolysis is separated into gas, liquid and solid.
It further include absorption cleaning equipment, the absorption cleaning equipment is connect with the decompression separation system, and being suitable for will be through institute
Gas after stating decompression separation system decompression separation carries out absorption cleaning processing.
It further include settlement treatment equipment, the settlement treatment equipment is connect with the decompression separation system, and being suitable for will be through institute
Liquid and solid after stating decompression separation system decompression separation carry out settlement treatment.
It further include isolating and purifying equipment, the equipment that isolates and purifies is connect with the settlement treatment equipment, and being suitable for will be through institute
State settlement treatment equipment treated that liquid carries out separation and purification treatment.
It further include cyclic delivery system, the feed end of the cyclic delivery system is connect with the equipment that isolates and purifies, and
Discharge end is connect with first high-pressure pumping system, suitable for will through it is described isolate and purify equipment separation after Recycling Mother Solution conveying
To first high-pressure pumping system.
The hydrothermal oxidization system and the highly pressured hydrolysis system are autoclave.
The present invention also provides a kind of waste plastic hydrothermal treatment devices to carry out at waste plastic partial oxidation and hydrolysis
The method of reason, including following methods:
(1) reaction mass is fed
Step 1: carrying out pulverization process to waste plastic to be treated as required using waste plastic crushing system, and by institute
It obtains smashed plastic grain and enters hydrothermal oxidization system；
Step 2: water and circulating mother liquor are entered water after preheated according to scheduled mass ratio using ingredient pumping system
Thermal oxide system；
Step 3: using oxidant pumping system by oxidant required for partial oxidation reaction it is preheated after enter hydro-thermal oxygen
Change system；
(2) partial oxidation reaction
Step 1: opening the heating and stirring facility of hydrothermal oxidization system, the temperature inside autoclave reactor is made to reach setting
It is kept constant after value；
Step 2: catalyst required for partial oxidation reaction is added by catalyst inlet, catalyst inlet is closed after adding,
Start the partial oxidation reaction of waste plastic；
Step 3: stopping the heating and stirring facility of hydrothermal oxidization system after the completion of partial oxidation reaction, and incipient degradation is produced
Object is transferred to highly pressured hydrolysis system；
(3) highly pressured hydrolysis reacts
Step 1: opening the heating and stirring facility of highly pressured hydrolysis system, the temperature inside autoclave reactor is made to reach setting
It is kept constant after value；
Step 2: catalyst required for highly pressured hydrolysis reacts is added by catalyst inlet, catalyst inlet is closed after adding,
Start the highly pressured hydrolysis reaction of incipient degradation material；
Step 3: highly pressured hydrolysis system is heated in stopping after the highly pressured hydrolysis process of incipient degradation material, continue to stir
It mixes, makes hydrolysate temperature natural cooling；
(4) reaction mass separates
Step 1: stopping the stirring facility of highly pressured hydrolysis system after highly pressured hydrolysis product temperatur natural cooling, and it is transferred to and is subtracted
Separation system is pressed, after system pressure is reduced to normal pressure by pressure reducing valve, gas is separated, and passes through absorption cleaning equipment pair
Gained gas empties after being handled；
Step 2: the surplus material for removing gas is introduced in settlement treatment equipment, by inciting somebody to action after the settlement treatment of certain time
Supernatant, which enters, isolates and purifies equipment progress purification process, and target catabolite is enable to purify and collect, and remaining mother liquor
Recycled in the first high-pressure pumping system is transported to by cyclic delivery system；
Step 3: removing the residual solid after liquid is mainly inoganic solids residue, it is carried out by conventional methods such as landfills
Processing.
The beneficial effects of the present invention are: the present invention makes full use of the special nature that high-temperature and high-pressure conditions are lauched, make discarded modeling
Incipient degradation is realized by partial oxidation in the aqueous medium of material under this condition, the energy released using its oxidation reaction is to dimension
The continuous service for holding system compensates, and hydrolyzes initial degradation products further under hydrothermal conditions, can
Obtaining has the target catabolite for recycling value.Compared with prior art, particularly advantage of the invention is as follows:
(1) waste plastic carries out partial oxidation reaction and hydrothermal degradation reaction in the aqueous medium under high-temperature and high-pressure conditions, avoids
The use of conventional process reagent methanol, ethyl alcohol, amine (ammonia), benzene,toluene,xylene, tetrahydrofuran, dihydric alcohol etc. processes
Journey is small to the harm of human body, not will cause secondary pollution.
(2) it makes full use of the water under high-temperature and high-pressure conditions as the peculiar advantage of green reaction medium, not only makes discarded modeling
Material is effectively degraded to lesser molecule under this condition, and since system is simple, so that the separation and purifying of catabolite
It is easier to carry out, the resource utilization for being conducive to catabolite utilizes.
(3) waste plastic and oxidant come into full contact in hydrothermal oxidization system, and under the conditions ofs stirring, catalyst aid etc.
Quick partial oxidation reaction is carried out, a large amount of heat can be not only released, is made required for waste plastic hydrothermal oxidization system
Energy compensated, and substantially realize conversion of the solid plastic particles to liquid, be conducive to its further hydrothermal degradation
Reaction.
(4) it after waste plastic particle carries out partial oxidation processing, is and then just transferred into highly pressured hydrolysis system and carries out into one
The hydrolysis of step can make full use of material possessed higher-energy state in hydrothermal oxidization system, be conducive to handle
Requirement of the process for low energy consumption cost.
(5) waste plastic by partial oxidation, hydrothermal degradation, the several steps of decompression separation processing after, not only realize
Waste plastic it is degradable, and various materials caused by entire treatment process are dealt carefully with, i.e., by discarded modeling
The processing disposition of material and the resource utilization of its active principle utilize consideration of uniting, and the application for being conducive to technology is promoted.
Detailed description of the invention
Fig. 1 is structural schematic diagram according to the present invention.
Specific embodiment
With reference to the accompanying drawing and invention is described further in specific embodiment:
With reference to Fig. 1, a kind of waste plastic hydrothermal treatment device according to the present invention, comprising: hydrothermal oxidization system, highly pressured hydrolysis system
System, waste plastic crushing system, ingredient pumping system and oxidant pumping system.Wherein, hydrothermal oxidization system is used for discarded
Plastics carry out partial oxidation reaction, even if smashed waste plastic particle carries out partial oxidation in high temperature and pressure hydrothermal fluid
Reaction；The feed inlet of highly pressured hydrolysis system is connected to the discharge port of hydrothermal oxidization system, for through hydrothermal oxidization system oxidation
Product after reaction is further hydrolyzed, it is made to be converted into target degradation product as far as possible；Waste plastic crushing system and water
The feed inlet of thermal oxide system is connected to, for crushing and being transported in hydrothermal oxidization system by waste plastic；Ingredient pumping system
For by the ingredient of water and mother liquor it is preheated after be transported in hydrothermal oxidization system；Oxidant pumping system is for passing through oxidant
It is transported to after preheating in hydrothermal oxidization system.
Preferably, hydrothermal oxidization system is conventional autoclave, configured with stirring, heating, catalyst inlet, into
The facilities such as material, discharging, temperature and pressure monitoring.Wherein, the effect for stirring facility be to make waste plastic particle and hydrothermal fluid,
Oxidant comes into full contact with and rapid mass transfer, to accelerate its oxidation reaction；The effect of heating facility is to guarantee in autoclave
Temperature can reach actual requirement, carry out the partial oxidation reaction of waste plastic under determined temperature；Catalyst inlet
It is the facility entered for catalyst inside autoclave；Feed inlet is and ingredient pumping system, oxidant pumping system
The facility being connected with waste plastic crushing system, so that reaction mass enters inside autoclave；Discharge port is and height
The facility of hydrolysis system connection is pressed, treated that incipient degradation material enters highly pressured hydrolysis system so that completing partial oxidation；
Temperature and pressure monitoring is realized by temperature sensor and pressure sensor, with monitor in real time temperature inside autoclave reactor with
Pressure.
Preferably, highly pressured hydrolysis system is also conventional autoclave, structure function as hydrothermal oxidization system, this
Place repeats no more.
In one example, the 2/3 of autoclave body dischargeable capacity is not to be exceeded in autoclave materials inside.Partial oxidation reaction
Incipient degradation material afterwards stops the heating to highly pressured hydrolysis system after highly pressured hydrolysis internal system completes hydrolysis, and
Hydrolysis material is set to naturally cool to 50 DEG C or less.
Preferably, waste plastic crushing system is a conventional solid material pulverizer, waste plastic can be crushed
To certain particle size range, so that smashed plastic grain is transported to the hydro-thermal oxygen under high-temperature and high-pressure conditions in which not only can be convenient
Change system, and can be come into full contact with oxidant and carry out partial oxidation reaction.
Preferably, ingredient pumping system includes the first high-pressure pumping system and the first pre-heating system, and first is pumped by and is
System is connect with the first pre-heating system, and the first pre-heating system is connected with the feed inlet of hydrothermal oxidization system, suitable for by oxidant from the
One high-pressure pumping system is pumped into the first pre-heating system, is transported in hydrothermal oxidization system after preheated.Preferably, the first high pressure
Pumping system uses high-pressure pump, and the first pre-heating system is electric heating system, such as tube type electric-heating device, one port and high
The outlet of press pump, another port are connect with the feed inlet of hydrothermal oxidization system, i.e., connect with the feed inlet of autoclave.
In this way, the ingredient of water and mother liquor is pumped into the first pre-heating system from the first high-pressure pumping system, hydro-thermal oxygen is transported to after preheated
In change system.
Preferably, oxidant pumping system includes the second high-pressure pumping system and the second pre-heating system, and second is pumped by
System is connect with the second pre-heating system, and the second pre-heating system is connected with the feed inlet of hydrothermal oxidization system, be suitable for by oxidant from
Second high-pressure pumping system is pumped into the second pre-heating system, is transported in hydrothermal oxidization system after preheated.Preferably, second is high
Pressure pumping system uses high-pressure pump, and the second pre-heating system is electric heating system, such as tube type electric-heating device, one port with
The outlet of high-pressure pump, another port are connect with the feed inlet of hydrothermal oxidization system, i.e., connect with the feed inlet of autoclave
It connects.In this way, oxidant is pumped into the second pre-heating system from the second high-pressure pumping system, hydrothermal oxidization system is transported to after preheated
In.
In one example, the output of high-pressure pumping system (containing the first high-pressure pumping system and the second high-pressure pumping system)
Pressure can reach 35 megapascal, and actual working pressure can be set and be regulated and controled according to specific needs, and delivery rate range is
10 ml/mins to 100 ml/mins, practical delivery rate can be set and be adjusted according to specific needs.
In one example, pre-heating system (containing the first pre-heating system and the second pre-heating system) can respectively will be by high-pressure pump
The system material that conveying comes is sent to be preheating to 600 DEG C, practical preheating temperature can be set and be regulated and controled according to specific needs.
In order to separate the product after high temperature and high pressure hydrolysis, decompression is also connected in the discharge port of highly pressured hydrolysis system
Product at reduced pressure after hydrolysis is separated into gas, liquid and solid by separation system.Preferably, after decompression separation system also
It is connected with absorption cleaning equipment, absorption cleaning processing will be carried out through the gas after the decompression separation system decompression separation.Example
Such as after gas is separated, emptied after the gas to obtained by is handled through absorption cleaning equipment as absorbent or cleanser,
To reduce pollution of the exhaust gas to environment.
Preferably, it is also connected with settlement treatment equipment after decompression separation system, will subtract through the decompression separation system
Liquid and solid after pressure separation carry out settlement treatment.Settlement treatment equipment is preferably settling tank, passes through the sedimentation of certain time
Liquid and fixed separation can be achieved after processing, be at the middle and upper levels clear liquid, and bottom is solid residue.In one example, Gu
Body residue is conventionally handled, and supernatant is then purified and received to target degradable component according to actual needs
Collection recycles convenient for it,
Preferably, it is additionally provided with after settlement treatment equipment and isolates and purifies equipment, it will be after settlement treatment equipment processing
Liquid carry out separation and purification treatment, i.e., liquid is separated into target product and mother liquor.
Preferably, be provided with cyclic delivery system after isolating and purifying equipment, the feed end of cyclic delivery system with it is described
Equipment connection is isolated and purified, and discharge end is connect with first high-pressure pumping system, will isolate and purify equipment point through described
Recycling Mother Solution from after is conveyed to first high-pressure pumping system, realizes recycling for mother liquor, reduces waste plastic and decomposes
Cost.Cyclic delivery system can be conveyance conduit, can also have driving device, such as pump.
A kind of waste plastic hydrothermal treatment device according to the present invention carries out the side of waste plastic partial oxidation and hydrolysis process
Method, including following methods:
(1) reaction mass is fed
Step 1: carrying out pulverization process to waste plastic to be treated as required using waste plastic crushing system, and by institute
It obtains smashed plastic grain and enters hydrothermal oxidization system；
Step 2: water and circulating mother liquor are squeezed into according to scheduled mass ratio, such as 1:0.25 using ingredient pumping system
It is preheated to entering hydrothermal oxidization system after set temperature, such as 450 DEG C in one pre-heating system；
Step 3: oxidant required for partial oxidation reaction, such as 25% is squeezed into the second preheating using oxidant pumping system
It is preheated to entering hydrothermal oxidization system after set temperature, such as 400 DEG C in system；
(2) partial oxidation reaction
Step 1: opening the heating and stirring facility of hydrothermal oxidization system, the temperature inside autoclave reactor is made to reach setting
It keeps constant after value, such as is kept constant after reaching 450 DEG C；
Step 2: catalyst required for partial oxidation reaction is added by catalyst inlet, catalyst inlet is closed after adding,
Start the partial oxidation reaction of waste plastic；
Step 3: stopping the heating and stirring of hydrothermal oxidization system after partial oxidation reaction carries out setting time, such as 15 minutes
Facility, and initial degradation products are transferred to highly pressured hydrolysis system；
(3) highly pressured hydrolysis reacts
Step 1: opening the heating and stirring facility of highly pressured hydrolysis system, the temperature inside autoclave reactor is made to reach setting
Value, such as kept constant after 350 DEG C；
Step 2: catalyst required for highly pressured hydrolysis reacts is added by catalyst inlet, catalyst inlet is closed after adding,
Start the highly pressured hydrolysis reaction of incipient degradation material；
Step 3: highly pressured hydrolysis system is heated in stopping after the highly pressured hydrolysis process of incipient degradation material, continue to stir
It mixes, makes hydrolysate temperature natural cooling, such as be cooled to 50 DEG C or less；
(4) reaction mass separates
Step 1: stopping the stirring facility of highly pressured hydrolysis system after highly pressured hydrolysis product temperatur natural cooling, and it is transferred to and is subtracted
Separation system is pressed, after system pressure is reduced to normal pressure by pressure reducing valve, gas is separated, and passes through absorption cleaning equipment pair
Gained gas empties after being handled；
Step 2: the surplus material for removing gas is introduced in settlement treatment equipment, by inciting somebody to action after the settlement treatment of certain time
Supernatant, which enters, isolates and purifies equipment progress purification process, and target catabolite is enable to purify and collect, and remaining mother liquor
Recycled in the first high-pressure pumping system is transported to by cyclic delivery system；
Step 3: removing the residual solid after liquid is mainly inoganic solids residue, it is carried out by conventional methods such as landfills
Processing.
In this field, it is chemical production process that mother liquor, which refers to the residual liquid after the extraction of the target components in product liquid,
In general saying, because for the treatment of process difference, mother liquor is also identical.In the present invention, it is organic predominantly to contain minute quantity for mother liquor
The aqueous solution of catabolite is added a series of remainder after processes of the water in kettle in early period, it is allowed to recycle
Purpose is to save water, and makes that treated discharge is more cleaned.The ratio of itself and water wants depending on the circumstances, should not
Influence the treatment effect and efficiency of waste plastic.Oxidant is conventional oxidant, such as hydrogen peroxide in the present invention；Hydrothermal oxidization system
The catalyst of system is mainly metal or nonmetal oxide, such as calcium oxide, magnesia, aluminium oxide etc.；And highly pressured hydrolysis system
Catalyst is mainly liquid or solid alkaline matter, such as sodium hydroxide, sodium carbonate etc..
Partial oxidation of the waste plastic under by high-temperature and high-pressure conditions, hydrothermal degradation and decompression separation in the present invention
Afterwards, generated each component is dealt carefully with.Gained gaseous component directly empties after carrying out absorption cleaning, inorganic solid
Body residue is conventionally handled, and liquid according to actual needs collects target catabolite after purification,
Remaining mother liquor as degradation reagent component part and recycled.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of waste plastic hydrothermal treatment device characterized by comprising
Hydrothermal oxidization system is configured to carry out partial oxidation reaction to waste plastic；
Highly pressured hydrolysis system, feed inlet are connected to the discharge port of hydrothermal oxidization system, are configured to through hydrothermal oxidization system oxygen
Product after changing reaction is further hydrolyzed；
Waste plastic crushing system is connected to the feed inlet of hydrothermal oxidization system, is configured to that waste plastic is crushed and conveyed
Into hydrothermal oxidization system；
Ingredient pumping system, including the first high-pressure pumping system and the first pre-heating system, the first high-pressure pumping system and first is in advance
Hot systems connection, the first pre-heating system is connected with the feed inlet of hydrothermal oxidization system, is configured to the ingredient of water and mother liquor from the
One high-pressure pumping system is pumped into the first pre-heating system, is transported in hydrothermal oxidization system after preheated；
Oxidant pumping system, including the second high-pressure pumping system and the second pre-heating system, the second high-pressure pumping system and second
Pre-heating system connection, the second pre-heating system is connected with the feed inlet of hydrothermal oxidization system, is configured to oxidant from the second high pressure
Pumping system is pumped into the second pre-heating system, is transported in hydrothermal oxidization system after preheated.
2. waste plastic hydrothermal treatment device according to claim 1, it is characterised in that: it further include decompression separation system,
The feed end of the decompression separation system is connected to the discharge port of the highly pressured hydrolysis system, suitable for the product at reduced pressure after hydrolyzing
It is separated into gas, liquid and solid.
3. waste plastic hydrothermal treatment device according to claim 2, it is characterised in that: it further include absorption cleaning equipment,
The absorption cleaning equipment is connect with the decompression separation system, suitable for will be through the gas after the decompression separation system decompression separation
Body carries out absorption cleaning processing.
4. waste plastic hydrothermal treatment device according to claim 2, it is characterised in that: it further include settlement treatment equipment,
The settlement treatment equipment is connect with the decompression separation system, suitable for will be through the liquid after the decompression separation system decompression separation
Body and solid carry out settlement treatment.
5. waste plastic hydrothermal treatment device according to claim 4, it is characterised in that: it further include isolating and purifying equipment,
The equipment that isolates and purifies is connect with the settlement treatment equipment, be suitable for will through the settlement treatment equipment treated liquid into
Row separation and purification treatment.
6. waste plastic hydrothermal treatment device according to claim 5, it is characterised in that: it further include cyclic delivery system,
The feed end of the cyclic delivery system is connect with the equipment that isolates and purifies, and discharge end and first high-pressure pumping system
Connection, suitable for by through it is described isolate and purify equipment separation after Recycling Mother Solution be conveyed to first high-pressure pumping system.
7. waste plastic hydrothermal treatment device according to claim 1, it is characterised in that: the hydrothermal oxidization system and institute
Stating highly pressured hydrolysis system is autoclave.
8. it is a kind of using any waste plastic hydrothermal treatment device of claim 1 to 7 carry out waste plastic partial oxidation and
The method of hydrolysis process, which is characterized in that including following methods:
(1) reaction mass is fed
Step 1: carrying out pulverization process to waste plastic to be treated as required using waste plastic crushing system, and by institute
It obtains smashed plastic grain and enters hydrothermal oxidization system；
Step 2: water and circulating mother liquor are entered water after preheated according to scheduled mass ratio using ingredient pumping system
Thermal oxide system；
Step 3: using oxidant pumping system by oxidant required for partial oxidation reaction it is preheated after enter hydro-thermal oxygen
Change system；
(2) partial oxidation reaction
Step 1: opening the heating and stirring facility of hydrothermal oxidization system, the temperature inside autoclave reactor is made to reach setting
It is kept constant after value；
Step 2: catalyst required for partial oxidation reaction is added by catalyst inlet, catalyst inlet is closed after adding,
Start the partial oxidation reaction of waste plastic；
Step 3: stopping the heating and stirring facility of hydrothermal oxidization system after the completion of partial oxidation reaction, and incipient degradation is produced
Object is transferred to highly pressured hydrolysis system；
(3) highly pressured hydrolysis reacts
Step 1: opening the heating and stirring facility of highly pressured hydrolysis system, the temperature inside autoclave reactor is made to reach setting
It is kept constant after value；
Step 2: catalyst required for highly pressured hydrolysis reacts is added by catalyst inlet, catalyst inlet is closed after adding,
Start the highly pressured hydrolysis reaction of incipient degradation material；
Step 3: highly pressured hydrolysis system is heated in stopping after the highly pressured hydrolysis process of incipient degradation material, continue to stir
It mixes, makes hydrolysate temperature natural cooling；
(4) reaction mass separates
Step 1: stopping the stirring facility of highly pressured hydrolysis system after highly pressured hydrolysis product temperatur natural cooling, and it is transferred to and is subtracted
Separation system is pressed, after system pressure is reduced to normal pressure by pressure reducing valve, gas is separated, and passes through absorption cleaning equipment pair
Gained gas empties after being handled；
Step 2: the surplus material for removing gas is introduced in settlement treatment equipment, by inciting somebody to action after the settlement treatment of certain time
Supernatant, which enters, isolates and purifies equipment progress purification process, and target catabolite is enable to purify and collect, and remaining mother liquor
Recycled in the first high-pressure pumping system is transported to by cyclic delivery system；
Step 3: removing the residual solid after liquid is mainly inoganic solids residue, it is carried out by conventional methods such as landfills
Processing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022252244A1 (en) * | 2021-05-29 | 2022-12-08 | 浙江大学 | Method for preparing hydrogen-rich syngas by degrading polyolefin waste plastic at low temperature |
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| JP2023531848A (en) * | 2021-05-29 | 2023-07-26 | 浙江大学 | Method for producing hydrogen-rich synthesis gas by low-temperature cracking of polyolefin-based waste plastics |
| JP7475614B2 (en) | 2021-05-29 | 2024-04-30 | 浙江大学 | Method for producing hydrogen-rich synthesis gas by low-temperature decomposition of polyolefin waste plastics |
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Application publication date: 20181228 |