CN110240369A - A kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment process method - Google Patents
A kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment process method Download PDFInfo
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- CN110240369A CN110240369A CN201910490781.XA CN201910490781A CN110240369A CN 110240369 A CN110240369 A CN 110240369A CN 201910490781 A CN201910490781 A CN 201910490781A CN 110240369 A CN110240369 A CN 110240369A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment process methods, this method comprises: by polymer-containing oil sludge and crude oil demulsifier, the pyrolysis oil that pyrolytic reaction obtains is carried out liquid in extraction reactor as extractant and sewage disposal system and is thoroughly mixed, after extraction, again through three phase separation of flocculating, the gas phase that wherein solid slag item pyrolysis reactor progress pyrolytic reaction obtains is through level-one, secondary heat exchange, condenser condensation enters the isolated pyrolysis oil of three phase separator and is circulated back to extraction reactor after heat exchange as extractant, isolated fixed gas enters the dissolving of sewage disposal system after processing is collected, coalescence gas is provided for sewage disposal system.Processing method of the present invention not only can sufficiently recycle the crude resources in polymer-containing oil sludge, but also heat, pyrolysis oil and fixed gas realization in pyrolytic process is enabled to recycle, and realize volume reduction minimizing, recycling and the harmless treatment of polymer-containing oil sludge.
Description
Technical field:
The invention belongs to solid waste process fields, and in particular at a kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling
Science and engineering process.
Background technique:
Due to the large-scale application of polymer flooding, remaining polyacrylamide (HPAM) and water treatment agent in polymer-containing oil sludge,
Solid particle interaction, wraps up crude oil and water, forms the stable polymer-containing oil sludge of property.Poly- displacing oil-field and the poly- repelling crude oil of use
The crude oil storage tank bed mud of refinery and the scum bottom sludge of water treatment system produce a large amount of polymer-containing oil sludge, and performance is different from common
" three mud of refinery ", processing difficulty is larger.
In the treatment process of polymer-bearing produced fluid, the Water purification medicaments such as coagulant and flocculant of addition can play oil removing and remove
The effect of suspended matter, but a kind of property and its stable greasy filth i.e. polymer-containing oil sludge are brought therewith.Due to anionic polymer
In the presence of so that poly- flooding produced liquid stability improves, the dosage of common coagulant and flocculant can be in sewage purification process
Growth again, generates a large amount of large viscosities, the very poor polymer-containing oil sludge of mobility.Such polymer-containing oil sludge performance and its stabilization, grease contain
Amount is high, and solid content is low, can be by its resource utilization wherein valuable crude resources.Due to the presence of polymer, polymer-containing oil sludge is de-
Water is very difficult, and after " chemical modulation-centrifuge separation ", for moisture content in 80%-90%, whole pyrolysis processing energy consumptions are too high.
Summary of the invention:
It is an object of the invention to a kind of pyrolysis by polymer-containing oil sludge-extraction cycle recycling treatment process to solve to contain
Poly- greasy filth emulsion stabilization, dehydration and the high problem of recycling crude oil difficulty, can not only sufficiently recycle the crude oil in polymer-containing oil sludge
Resource, and heat, pyrolysis oil and fixed gas realization in pyrolytic process is enabled to recycle, realize polymer-containing oil sludge
Volume reduction minimizing, recycling and harmless treatment.
The present invention provides a kind of pyrolysis-extraction cycle recycling treatment process method of polymer-containing oil sludge, and this method includes such as
Lower step:
(1) polymer-containing oil sludge is pumped into extraction reactor by diaphragm, crude oil demulsifier is filled on pipeline, with 100 DEG C-
120 DEG C of pyrolysis oil and sewerage is carried out liquid and is thoroughly mixed in extraction reactor, after extracting 40-60min, by spiral shell
Bar, which pumps and fills to be sent into three-phase centrifuge after flocculating agent A, carries out three phase separation, and oil mutually enters Crude Oil Buffer Tank's and settles, and is contained
Water rate flows into crude oil storage tank in 0.5% crude oil below, and the sewage settled enters sewage surge tank；Water phase sewage flows into dirty
Water surge tank, solid slag are mutually sent into desiccation reactor by auger conveyor；The weight of the pyrolysis oil and polymer-containing oil sludge oil content
Than for 1:1-1:5；
(2) solid slag communicated desiccation reactor under the action of 100-150 DEG C of thermal medium is oily for the moisture content of polymer-containing oil sludge
It is reduced to 30%, after then the solid slag after desiccation is mutually delivered to pyrolysis reactor, in nitrogen reducing atmosphere, 550-650 DEG C of temperature
The lower pyrolysis of degree, is pyrolyzed the vapor for generating 550-650 DEG C and pyrolysis gas after first-class heat exchanger is cooled to 250-300 DEG C, then with
The pyrolysis oil of circulation is cooled to 180-200 DEG C in secondary heat exchanger, and three-phase is entered after being down to 50-60 DEG C finally by condenser
The isolated fixed gas of separator, pyrolysis oil and sewage three-phase, fixed gas enter fixed gas processing system, and pyrolysis oil passes through second level
Extraction reactor is returned after heat exchanger heating, sewage enters sewage disposal system；Pyrolysis residue outward transport landfill or solidification；(3)
Into the fixed gas of fixed gas processing system, first passes through sack cleaner and cyclone separator dedusting denitration is compressed through fixed gas again
Enter fixed gas storage tank after machine pressurization, the fixed gas part in storage tank is dissolved in dissolving, and dissolving pressure is controlled in 0.2-
0.6MPa, part fixed gas enter flare system；
The fixed gas enters agglomerated air floatation device with the recirculation water of agglomerated air floatation device after fixed gas processing system
Dissolving.
(4) after the sewage from three-phase centrifuge, Crude Oil Buffer Tank's and three phase separator enters sewage surge tank, first
Agglomerated air floatation device is pumped to by sewage pump, sewage obtains oil content and be reduced to 30mg/ by coalescing with after oil removal by air bubbling
Sewage within L, the dross wherein generated in agglomerated air floatation device are pumped to after collecting by agglomerated air floatation dross elevator pump
In extraction reactor, the gas phase that agglomerated air floatation device generates enters low pressure flare system, and the recirculation water of agglomerated air floatation device enters
Dissolving is back to agglomerated air floatation device and releases in agglomerated air floatation area bottom after being sufficiently mixed with the fixed gas from fixed gas storage tank
It puts；Sewage after oil removing enters the further oil removing of purpose ceramic-film filter, obtains middle water and concentrate that oil content is lower than 5mg/L,
Wherein middle water enter in water surge tank as water, concentrate and purpose ceramic-film filter backwashing water in reuse use pumped to extraction
It is handled again in reactor.
In pyrolysis-extraction cycle recycling treatment process method of polymer-containing oil sludge of the present invention, crude oil demulsifier is preferably
Polyethers demulsifier, mass concentration 0.5%-2%.
Further preferably, the flocculating agent A is preferably polyacrylamide flocculant.
Further preferably, the Crude Oil Buffer Tank's are horizontal oil water separator, inside set baffle plate, expansion chamber, grease chamber
And water chamber.
Further preferably, the three-phase centrifuge is horizontal helical type three-phase supercentrifuge, and revolving speed is in 3000-4000r/
min。
Further preferably, mutually addition is dehydrated biochemical sludge to the polymer-containing oil sludge solid slag before entering desiccation reactor, adds
Dosage is the 0-15% of polymer-containing oil sludge solid slag phase weight.
Further preferably, flocculating agent B is filled at the agglomerated air floatation device portal, the flocculating agent B is polyaluminium
The compounding product of one or more of aluminium, poly-ferric chloride and polydimethyl diallyl ammonium chloride.
The present invention still further provides a kind of processing system of pyrolysis-extraction cycle recycling treatment for realizing polymer-containing oil sludge
System, the system include extraction and separation system, pyrolytic reaction system and sewage disposal system, the extraction and separation system include according to
Extraction reactor, screw pump, three-phase centrifuge, crude oil elevator pump and the Crude Oil Buffer Tank's of secondary connection；The pyrolytic reaction system
System includes sequentially connected desiccation reactor, pyrolysis reactor and condenser, and the sewage disposal system includes being sequentially connected
Sewage surge tank, sewage pump, agglomerated air floatation device, purpose ceramic-film filter entrance elevator pump, purpose ceramic-film filter, middle water
Surge tank, in which:
The system further includes fixed gas processing system, and the pyrolytic reaction system further includes level-one heat exchange
Device, two-stage heat exchanger and three phase separator, the gaseous phase outlet of the pyrolysis reactor successively with the first-class heat exchanger,
Secondary heat exchanger, condenser, three phase separator connection, the pyrolysis oil export of the three phase separator through pyrolysis oil elevator pump with
The secondary heat exchanger connection, the secondary heat exchanger outlet is connect with extraction reactor entrance, so that pyrolysis oil be made to pass through
Extraction reactor is returned after heat exchange；The fixed gas outlet of the three phase separator is connect with the fixed gas processing system,
The fixed gas system includes sequentially connected sack cleaner, cyclone separator, fixed gas compressor, fixed gas buffering
Tank, the wherein fixed gas of sack cleaner and three phase separator outlet connection；The outlet of sewer of the three phase separator and institute
The sewage disposal system connection stated, the sewage disposal system further include dissolving, and dissolving is equipped with gas access, liquid enters
Mouthful and the outlet of molten gas, wherein gas access connects fixed gas surge tank, so that part fixed gas is entered dissolving, liquid inlet and poly-
The reflux water pipe connection of air-floating apparatus is tied, the molten gas outlet of dissolving is connect with the molten gas entrance of agglomerated air floatation device, to will return
The dissolved air water that flowing water and fixed gas are sufficiently mixed is back to agglomerated air floatation device.
The pyrolysis of polymer-containing oil sludge of the present invention-extraction cycle recycling treatment process method compared with prior art, this method
Sufficient resource utilization is carried out to thermal decomposition product (pyrolysis oil and fixed gas), utilizes one in pyrolysis oil extraction polymer-containing oil sludge
Divide crude oil, reduce its oil content, it is difficult to which the part of extraction carries out pyrolysis processing again, and the heat of pyrolysis is utilized to carry out polymer-containing oil sludge
Desiccation reduce its moisture content so that efficiency highest in pyrolysis reactor；The fixed gas generated using pyrolysis is as agglomerated air floatation
The aeration gas source of device, the energy circulation rate and resource recovery of entire technique reach highest, to realize polymer-containing oil sludge
Minimizing, recycling and innoxious.
Detailed description of the invention
Fig. 1 is pyrolysis-extraction cycle recycling treatment process system schematic of polymer-containing oil sludge of the present invention.
1- extraction reactor in figure, 2- screw pump, 3- three-phase centrifuge, 4- auger conveyor, 5- crude oil elevator pump, 6- are former
Oily surge tank, 7- desiccation reactor, 8- pyrolysis reactor, 9- first-class heat exchanger, 10- secondary heat exchanger, 11- condenser A, 12-
Condenser B, 13- three phase separator, 14- sack cleaner, 15- cyclone separator, 16- fixed gas compressor, the storage of 17- fixed gas
Tank, 18- sewage surge tank, 19- sewage pump, 20- agglomerated air floatation device, 21- dissolving, 22- purpose ceramic-film filter entrance
Elevator pump, 23- purpose ceramic-film filter, 24- purpose ceramic-film filter backwash elevator pump, water surge tank in 25-, 26- agglomerated air floatation
Dross elevator pump, 27- purpose ceramic-film filter concentrate elevator pump, 28- pyrolysis oil elevator pump.
Specific embodiment
Further illustrate process and processing system provided by the present invention with reference to the accompanying drawing, but the present invention not because
This and be any way limited.
Fig. 1 is pyrolysis-extraction cycle recycling treatment system schematic diagram of polymer-containing oil sludge of the present invention.
As shown in Figure 1, the pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment system includes extraction and separation system, pyrolysis
Reaction system, fixed gas processing system and sewage disposal system.Wherein extraction and separation system includes sequentially connected extraction reaction
Device 1, screw pump 2, three-phase centrifuge 3, crude oil elevator pump 5 and Crude Oil Buffer Tank's 6；Pyrolytic reaction system includes sequentially connected dry
Change reactor 7, pyrolysis reactor 8, first-class heat exchanger 9, secondary heat exchanger 10, condenser-A11, three phase separator 13, wherein doing
The entrance for changing reactor 7 is connect by auger conveyor 4 with the three-phase centrifuge 3 of extraction and separation system, the gas of desiccation reactor 7
Body outlet is connect with condenser B12, and the outlet condenser B12 is connect with condenser A11 outlet line, what desiccation reactor 7 exported
Polymer-containing oil sludge is by auger conveyor 4 into pyrolysis reactor 8, the gaseous phase outlet of pyrolysis reactor 8 and by first-class heat exchanger 9
It exchanges heat in secondary heat exchanger 10 with pyrolysis oil with after the heat exchange condensation of thermal medium oil, pyrolysis gas finally passes through condenser A11 condensation
Enter three phase separator 13 afterwards, the pyrolysis oil export of three phase separator 13 is connected by pyrolysis oil elevator pump 28 and secondary heat exchanger 10
It connects, heats pyrolysis oil, secondary heat exchanger 10 is connect with 1 entrance of extraction reactor again, so that pyrolysis oil be made to return after exchanging heat
Extraction reactor；Fixed gas processing system includes sequentially connected sack cleaner 14, cyclone separator 15, fixed gas compressor
16, fixed gas surge tank 17, wherein the fixed gas of sack cleaner 14 and three phase separator 13, which exports, connects；Sewage disposal system
Including sewage surge tank 18, sewage pump 19, agglomerated air floatation device 20, the purpose ceramic-film filter entrance elevator pump being sequentially connected
22, purpose ceramic-film filter 23, middle water surge tank 25, the wherein entrance of sewage surge tank 18 water phase with three-phase centrifuge 3 respectively
Outlet, the water chamber outlet of Crude Oil Buffer Tank's 6, the water phase outlet connection of three phase separator 13, sewage disposal system further includes molten gas
Tank 21, dissolving are equipped with gas access, liquid inlet and the outlet of molten gas, and wherein gas access connects fixed gas surge tank 17, makes
Part fixed gas enters dissolving 21, and liquid inlet is connect with the reflux water pipe of agglomerated air floatation device 20, and the molten gas of dissolving goes out
Mouth is connect with the molten gas entrance of agglomerated air floatation device 20, so that recirculation water and the dissolved air water that fixed gas is sufficiently mixed are back to
Agglomerated air floatation device 20.Agglomerated air floatation device 20 is additionally provided with gas vent, dross outlet, wherein gas vent and low pressure flare system
System connection, dross outlet are connect through agglomerated air floatation dross elevator pump 26 with extraction reactor 1；The concentrate of purpose ceramic-film filter 23
Outlet is connected with purpose ceramic-film filter concentrate elevator pump 27, and purpose ceramic-film filter concentrate is mentioned through purpose ceramic-film filter concentrate
Pump 27 is risen to be back in extraction reactor 1；Sewage disposal system further preferably includes purpose ceramic-film filter backwash elevator pump 24, pottery
Porcelain membrane filter backwash elevator pump 24 is connect with purpose ceramic-film filter 23 and middle water surge tank 25 respectively, to realize ceramic membrane
The Membrane cleaning of filter 23.
Start diaphragm pump, untreated polymer-containing oil sludge is injected into extraction reactor 1, and fill mass concentration and be
1.5% demulsifier (demulsifier that the present embodiment uses is alkyl phenolic resin block polyether), blender in extraction reactor 1
Mixing speed be adjusted to 120r/min, after stirring 40min, into carrying out oil-water residue three phase separation, filling in three-phase centrifuge 3
Flocculating agent A (the cationic polyacrylamide class flocculant that embodiment uses, specially acrylamide and methylacryoyloxyethyl
The copolymer of trimethyl ammonium chloride) 300mg/L, oil, which is mutually entered in Crude Oil Buffer Tank's 6 by crude oil elevator pump 5, continues sedimentation separation
It obtains moisture content and flows into crude oil storage tank in 0.5% crude oil below, water phase enters sewage surge tank 18, solid slag phase by gravitational difference
It is to enter in pyrolysis reactor 8 after being sent into the desiccation of desiccation reactor by auger conveyor, pyrolysis reactor 8 is added by electromagnetic radiation
Heat is pyrolyzed 50min to 600 DEG C under nitrogen atmosphere, and the high-temperature vapor and pyrolysis gas for obtaining 600 DEG C are in first-class heat exchanger 9
Thermal medium oil is heated to 120 DEG C, opens 7 thermal medium oil-in of desiccation reactor and outlet valve at this time, and it is anti-to start desiccation
After answering device 7, vapor and pyrolysis gas to be cooled to 230 DEG C in first-class heat exchanger 9, the bypass line of secondary heat exchanger 10 is walked,
Condenser A is condensed to three phase separator 13 is entered after 50 DEG C, carries out oil-water-gas three-phase separation, opens secondary heat exchanger 10, pyrolysis
Oil is entered after secondary heat exchanger 10 is heated to 100 DEG C by vapor and pyrolysis gas after entering grease chamber by pyrolysis oil elevator pump 28
Extraction reactor 1, at this point, the flow of adjustment entrance polymer-containing oil sludge, the weight ratio of polymer-containing oil sludge and pyrolysis oil is controlled 5:
1, demulsifier adding amount is adjusted downward to 0.5%.Reaction temperature is 150 DEG C in desiccation reactor 7, and vapor and low boiling point oil gas are cold
After being cooled to 50 DEG C in condenser B12, into three phase separator 13.Pyrolysis residue outward transport landfill or solidification.
Fixed gas in three phase separator 13 is after gaseous phase outlet enters 14 dedusting of bag filter by cyclonic separation
15 denitration of device is compressed to fixed gas surge tank 17 through fixed gas compressor 16, and the fixed gas in fixed gas surge tank 17 passes through valve
For door adjustment flow into dissolving 21, keeping pressure in dissolving 21 is 0.4MPa.
Into sewage surge tank 18, the sewage in sewage surge tank 18 passes through sewage overflow in 13 water chamber of three phase separator
Sewage pump 19 is pumped to agglomerated air floatation device 20 and carries out purified treatment, and filling flocculating agent B (is in embodiment at suction line
Polydimethyl diallyl ammonium chloride) 90mg/L, sewage enter after coalescence area removes most of oil agglomerated air floatation area into
One step Air Exposure, outlet sewage with oil control is in 30mg/L or less.The water purification outlet of agglomerated air floatation device 20 passes through ceramic membrane
Filter inlet elevator pump 22 enters purpose ceramic-film filter 23, wherein the reflux ratio control that agglomerated air floatation device 20 exports exists
20%, the dross in grease chamber is pumped to extraction reactor 1 by agglomerated air floatation dross elevator pump 26.In agglomerated air floatation device 20
Fixed gas enters the low pressure flare system of plant area.The producing water ratio 75% of ceramic membrane, 25% concentrate pass through purpose ceramic-film filter
23 concentrate elevator pumps 27 are pumped to extraction reactor 1.The water purification of purpose ceramic-film filter 23 enter in water surge tank 25 to reuse,
Start purpose ceramic-film filter backwash elevator pump 24 after the outlet water purification oil content of purpose ceramic-film filter 23 is more than 5mg/L to use
The middle water backwashing of middle water surge tank 23, backwashing water enter in extraction reactor 1.
The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit
Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (8)
1. a kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment process method, which comprises the steps of:
(1) polymer-containing oil sludge is pumped into extraction reactor by diaphragm, crude oil demulsifier is filled on pipeline, with 100 DEG C -120
DEG C pyrolysis oil and sewerage carry out liquid and be thoroughly mixed in extraction reactor, after extracting 40-60min, by screw rod
It pumps and fills to be sent into three-phase centrifuge after flocculating agent A and carry out three phase separation, oil mutually enters Crude Oil Buffer Tank's and settles, and obtains aqueous
Rate flows into crude oil storage tank in 0.5% crude oil below, and the sewage settled enters sewage surge tank；Water phase sewage flows into sewage
Surge tank, solid slag are mutually sent into desiccation reactor by auger conveyor；The weight ratio of the pyrolysis oil and polymer-containing oil sludge oil content
For 1:1-1:5；
(2) solid slag communicated desiccation reactor and reduced the moisture content of polymer-containing oil sludge under the action of 100-150 DEG C of thermal medium is oily
To 30%, after then the solid slag after desiccation is mutually delivered to pyrolysis reactor, at a temperature of nitrogen reducing atmosphere, 550-650 DEG C
Pyrolysis, pyrolysis generate 550-650 DEG C vapor and pyrolysis gas after first-class heat exchanger is cooled to 250-300 DEG C, then with circulation
Pyrolysis oil 180-200 DEG C is cooled in secondary heat exchanger, after being down to 50-60 DEG C finally by condenser enter three phase separation
The isolated fixed gas of device, pyrolysis oil and sewage three-phase, fixed gas enter fixed gas processing system, and pyrolysis oil passes through secondary heat exchange
Extraction reactor is returned after device heating, sewage enters sewage disposal system；Pyrolysis residue outward transport landfill or solidification；(3) enter
The fixed gas of fixed gas processing system, first passes through sack cleaner and cyclone separator dedusting denitration increases through fixed gas compressor again
Enter fixed gas storage tank after pressure, the fixed gas part in storage tank is dissolved in dissolving, and dissolving pressure is controlled in 0.2-
0.6MPa, part fixed gas enter flare system；
The fixed gas enters the molten of agglomerated air floatation device with the recirculation water of agglomerated air floatation device after fixed gas processing system
Gas tank；
(4) after the sewage from three-phase centrifuge, Crude Oil Buffer Tank's and three phase separator enters sewage surge tank, first by dirt
Water elevator pump is pumped to agglomerated air floatation device, sewage through coalescence and oil removal by air bubbling after, obtain oil content be reduced to 30mg/L with
Interior sewage, the dross wherein generated in agglomerated air floatation device are pumped to extraction by agglomerated air floatation dross elevator pump after collecting
It takes in reactor, the gas phase that agglomerated air floatation device generates enters low pressure flare system, and the recirculation water of agglomerated air floatation device enters molten
Gas tank and the fixed gas from fixed gas storage tank are back to agglomerated air floatation device and discharge in agglomerated air floatation area bottom after being sufficiently mixed；
Sewage after oil removing enters the further oil removing of purpose ceramic-film filter, obtains middle water and concentrate that oil content is lower than 5mg/L, wherein
Water surge tank is reacted as water, concentrate and purpose ceramic-film filter backwashing water in reuse use pumped to extraction in middle water entrance
It is handled again in device.
2. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In the crude oil demulsifier is polyethers demulsifier, and the mass concentration for accounting for polymer-containing oil sludge is 0.5%-2%.
3. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In the flocculating agent A is polyacrylamide flocculant.
4. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In the Crude Oil Buffer Tank's are horizontal oil water separator, inside set baffle plate, expansion chamber, grease chamber and water chamber.
5. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In the three-phase centrifuge is horizontal helical type three-phase supercentrifuge, and revolving speed is in 3000-4000r/min.
6. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In,
Mutually addition dehydration biochemical sludge, additive amount are solid for polymer-containing oil sludge before entering desiccation reactor for the polymer-containing oil sludge solid slag
The 0-15% of slag phase weight.
7. the pyrolysis of polymer-containing oil sludge according to claim 1-extraction cycle recycling treatment process method, feature exist
In,
At the agglomerated air floatation device portal fill flocculating agent B, the flocculating agent B be aluminium polychloride, poly-ferric chloride and
The compounding product of one or more of polydimethyl diallyl ammonium chloride.
8. a kind of pyrolysis of polymer-containing oil sludge-extraction cycle recycling treatment system, including extraction and separation system, pyrolytic reaction system
And sewage disposal system, the extraction and separation system include sequentially connected extraction reactor, screw pump, three-phase centrifuge,
Crude oil elevator pump and Crude Oil Buffer Tank's；The pyrolytic reaction system include sequentially connected desiccation reactor, pyrolysis reactor,
And condenser, the sewage disposal system include the sewage surge tank being sequentially connected, sewage pump, agglomerated air floatation device,
Purpose ceramic-film filter entrance elevator pump, purpose ceramic-film filter, middle water surge tank, which is characterized in that
The system further includes fixed gas processing system, and the pyrolytic reaction system further includes level-one heat exchanger, two
Grade heat exchanger and three phase separator, the gaseous phase outlet of the pyrolysis reactor successively with the first-class heat exchanger, second level
Heat exchanger, condenser, three phase separator connection, the pyrolysis oil export of the three phase separator through pyrolysis oil elevator pump with it is described
Secondary heat exchanger connection, the described secondary heat exchanger outlet is connect with extraction reactor entrance, to make pyrolysis oil through exchanging heat
After return to extraction reactor；The fixed gas outlet of the three phase separator is connect with the fixed gas processing system, described
Fixed gas system include sequentially connected sack cleaner, cyclone separator, fixed gas compressor, fixed gas surge tank,
The fixed gas of middle sack cleaner and three phase separator outlet connection；The outlet of sewer of the three phase separator and the dirt
Water treatment system connection, the sewage disposal system further includes dissolving, and dissolving is equipped with gas access, liquid inlet and molten
Gas outlet, wherein gas access connects fixed gas surge tank, and part fixed gas is made to enter dissolving, liquid inlet and agglomerated air floatation
The reflux water pipe of device connects, and the molten gas outlet of dissolving is connect with the molten gas entrance of agglomerated air floatation device, thus by recirculation water and
The dissolved air water that fixed gas is sufficiently mixed is back to agglomerated air floatation device.
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| CN113060864A (en) * | 2021-03-25 | 2021-07-02 | 中汇金源（北京）科技发展有限公司 | Process for purifying and recycling petrochemical oily sewage and sump oil |
| CN115448562A (en) * | 2021-06-09 | 2022-12-09 | 中国石油天然气集团有限公司 | Oily sludge pyrolysis treatment system and method |
| CN115028333A (en) * | 2022-07-07 | 2022-09-09 | 重庆工商大学 | Device and method for oil sludge pyrolysis and particle removal |
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