CN108238706A - Oily sludge substep pyrolysis treatment systems and technique - Google Patents
Oily sludge substep pyrolysis treatment systems and technique Download PDFInfo
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- CN108238706A CN108238706A CN201611206939.9A CN201611206939A CN108238706A CN 108238706 A CN108238706 A CN 108238706A CN 201611206939 A CN201611206939 A CN 201611206939A CN 108238706 A CN108238706 A CN 108238706A
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- oily sludge
- pyrolysis reactor
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 115
- 239000010802 sludge Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 77
- 239000003921 oil Substances 0.000 claims description 54
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 239000012530 fluid Substances 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 239000002296 pyrolytic carbon Substances 0.000 claims description 12
- 239000007792 gaseous phase Substances 0.000 claims description 10
- 239000012071 phase Substances 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 239000007790 solid phase Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000000295 fuel oil Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 235000014171 carbonated beverage Nutrition 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 7
- 239000012495 reaction gas Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 230000001925 catabolic effect Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000772415 Neovison vison Species 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005138 cryopreservation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Abstract
The invention discloses a kind of oily sludge substep pyrolysis treatment systems and technique, the processing system includes the first pyrolysis reactor, the second pyrolysis reactor, heat exchanger, heat supply combustion furnace, steam-water separator, oil-gas condenser and gas-liquid separator；The present invention can realize the cleaning of oily sludge, innoxious, recycling treatment under different pyrolysis temperatures and atmosphere, with conventional pyrolysis Technical comparing, its oil content of the pyrolysis residue that the present invention generates ＜ 0.3%, and heavy metal element is cured to and is wherein difficult to leach, pyrolysis residue reaches the standard of ordinary solid waste in itself, can directly landfill disposal without generating secondary pollution；In addition, the present invention can both recycle pyrolysis oil in oily sludge as merchantable fuel(s) oil, can also by pyrolysis oil together with the combustible gas of recycling for internal system heat supply to avoid additional energy, realization resource and energy recycle；The present invention has both Social benefit and economic benefit, has broad application prospects.
Description
Technical field
The present invention relates to a kind of oily sludge substep pyrolysis treatment systems and techniques.
Background technology
Oily sludge is one of primary solids waste of oil field and Petrochemical Enterprises.Oil enterprises in China generates landing oil every year
About 1,200,000 tons of mud (oily sludge), appearance are generally dark thick shape, and emulsification is serious, poor fluidity, has stink and crude oil
Taste, also containing harmful substances such as a large amount of crude oil, oil emulsions；Annual about 1/10 ground sludge can flow into environment, if not right
It is effectively treated, and not only results in secondary pollution, and huge harm can be also generated to human health.China will contain greasy dirt
Mud is included in《National Hazard waste catalogue》In,《Promotion law on cleaner production》With《Solid waste environmental pollution prevention and control method》Also requirement must
Harmless treatment must be carried out to it.
Currently, the conventional method of processing oily sludge has burning method, biological treatment, hot washing method, solvent extraction both at home and abroad
It follows the example of, chemical demulsification method, solid-liquid isolation method etc., but has the shortcomings that different degrees of：Burning method energy consumption is big, is also easy to produce secondary dirt
Dye, oily resource are not recycled utilization；Biological treatment need to mix oily sludge with fluffy powder, fertilizer and cultivation liquid, often quiver
Dynamic and gravity-flow ventilation, lasting 41 days could be biodegradable by 97% petroleum hydrocarbon, and similary oil resource is not recycled utilization yet；
Solvent extraction long flow path, complex process, long processing period, post processing are costly, only to containing the organic matter for being largely difficult to degrade
Oily sludge be applicable in；Chemical demulsification method need to separately add demulsifier and heating to emulsifying serious oily sludge；Solid-liquid isolation method pair
It is relatively low in oil content height, the oil recovery rate of seriously polluted oily sludge.As it can be seen that above-mentioned conventional method is due to treatment effect and life
Produce the reasons such as cost, it is difficult to which popularization and application at home causes current China's disposal of oily sludge problem never to obtain effectively
It solves.
Carry out the fundamental solution that disposal of oily sludge and recycling are disposal of oily sludge.Pyrolysismethod is a kind of energy regenerating
The treatment technology of type, its main feature is that thorough, the recyclable fuel-firing gas-firing resource of processing, is Net Energy output process.Oily sludge exists
After certain temperature is heated under anoxic condition making hydro carbons and organic matter depolymerization, hydrocarbon pyrolysis, remaining body refuse, hydro carbons i.e. other useful moneys
Source, that is, recoverable.However, its oil content of the greasy filth pyrolysis residue of conventional pyrolytic method generation is minimum still to reach 2%, pyrolysis
It is not changed with heavy metal existing for molecular state and ionic condition in residue, if these pyrolysis residues landfill arrives soil
In can cause secondary pollution, caused great harm to animals and plants.
Invention content
The technical problem to be solved by the present invention is in order to overcome oily sludge institute after pyrolysis processing technique in the prior art
The defects of pyrolysis residue its oil content reduction limitation obtained, the heavy metal element included easily cause secondary pollution, provides
A kind of oily sludge substep pyrolysis treatment systems and technique.
The present invention is to solve above-mentioned technical problem by following technical proposals：
The present invention provides a kind of oily sludge substep pyrolysis treatment systems, including the first pyrolysis reactor, the second heat
Solve reactor, heat exchanger, heat supply combustion furnace, steam-water separator, oil-gas condenser and gas-liquid separator；First pyrolysis is anti-
The solid phase discharge port of device is answered to be connect with the solid phase feed inlet of second pyrolysis reactor, the gas phase of first pyrolysis reactor
Discharge port is connect with the steam-water separator, the exhanst gas outlet of first pyrolysis reactor and the hot fluid of the heat exchanger
Entrance connects, and gas phase discharge port and the oil-gas condenser and the gas-liquid separator of second pyrolysis reactor connect successively
It connects, the gaseous phase outlet of the steam-water separator is connect with the oil-gas condenser, the gaseous phase outlet of the gas-liquid separator and institute
Feed inlet of the cold fluid outlet of heat exchanger with the heat supply combustion furnace is stated to connect, and the discharge port of the heat supply combustion furnace
It is connect with the gas-phase feed mouth of second pyrolysis reactor.
In the present invention, first pyrolysis reactor and second pyrolysis reactor be this field it is conventional can be continuous
The pyrolysis reactor of processing, including at least a feed inlet and a discharge port, according to structure difference be divided into fixed-bed pyrolysis reactor,
Moving bed pyrolysis reactor, fluidized bed pyrolysis reactor and revolving burner pyrolysis reactor etc., can be according to needed for selecting actual conditions
Pyrolysis reactor form.
In the present invention, a fluid pressure type preferably is provided between first pyrolysis reactor and second pyrolysis reactor
Closed feeding machine, for second pyrolytic reaction will to be sent into through the oily sludge after the first pyrolysis reactor preliminary treatment
In device；The fluid pressure type closed feeding machine is the fluid pressure type closed feeding machine of this field routine.
In the present invention, the heat exchanger is heat of the heat exchange between cold and hot fluid as principle of this field routine
Exchanger, including cold fluid inlet, cold fluid outlet, thermal fluid inlet and hot fluid outlet ports；The heat exchanger is according to effect
Principle difference is divided into dividing wall type heat exchanger, heat regenerator and direct contact heat exchanger, can be according to needed for selecting actual conditions
Heat exchanger form.
In the present invention, the hot fluid outlet ports of the heat exchanger are preferably connect with a column for smoke purification；The flue gas is net
It is conventional for this field to change tower, is used to implement the recycling of flue gas.
In the present invention, the heat supply combustion furnace is the burner of this field routine, for being provided for pyrolysis treatment systems
Partial heat energy.
In the present invention, the oil-gas condenser is the oil-gas condenser of this field routine, is generated for separating and recovering pyrolysis
Fuel oil and combustion gas.
In the present invention, the oil-gas condenser is preferably comprised level-one oil-gas condenser and two level oil-gas condenser, described
Level-one oil-gas condenser recycles for the preliminary condensation of high-temperature oil gas.
In the present invention, the steam-water separator is the steam-water separator of this field routine, for by the first pyrolysis reactor
The moisture of entrained with removes in institute's heat production solution oil gas；The gaseous phase outlet of the steam-water separator is preferably gas-cooled with the primary oil
Condenser connects, and the discharge outlet of the steam-water separator is connect with sewage disposal system.
In the present invention, gas-liquid separator of the gas-liquid separator for this field routine, the gas phase of the gas-liquid separator
Outlet is preferably connect with a combustible gas washing, purifying device, and the liquid-phase outlet of the gas-liquid separator is preferably stored up with a fuel oil
Cryopreservation device connects；The combustible gas washing, purifying device is the clarifier of this field routine.
The present invention also provides a kind for the treatment of process for applying oily sludge substep pyrolysis treatment systems as described above,
Include the following steps：
(1) oily sludge after desiccation is sent into the first pyrolysis reactor and carries out preliminary pyrolytic reaction, obtain high temperature cigarette
Oily sludge after gas, level-one pyrolysis oil gas and preliminary treatment, the high-temperature flue gas are passed through heat exchanger and after air heat-exchange points
Low-temperature flue gas and heating air are not obtained, and the low-temperature flue gas is handled through column for smoke purification to be absorbed, and the level-one pyrolysis oil gas is passed through
Steam-water separator is to remove the moisture of entrained with；
(2) oily sludge after the preliminary treatment is sent into the second pyrolysis reactor, and is passed through H2O carries out second heat
Solution reaction, obtains curing pyrolytic carbon and two level pyrolysis oil gas, and the two level is pyrolyzed oil gas and after steam-water separator processing
Level-one pyrolysis oil gas mixed in oil-gas condenser after through gas-liquid separator obtain pyrolysis oil and combustible gas, the combustible gas
It mixes to be incorporated in heat supply combustion furnace after burning with the heating air and is passed through second pyrolysis reactor；
(3) the curing pyrolytic carbon and the pyrolysis oil are recycled, you can；
Wherein, in step (1), the reaction temperature of the preliminary pyrolytic reaction is 420~550 DEG C, the reaction time for 25~
30min；
In step (2), the reaction temperature of the secondary pyrolytic reaction is 550~600 DEG C, reaction time 30min.
In the present invention, the oily sludge is conventional for this field, refer generally in petroleum industry production process due to it is various because
The mud mixture that element causes the mink cell focuses such as crude oil, product oil and residual oil to be mixed after leaking with soil, water etc. and formed；
The oil content of the oily sludge is generally 10~50%, and moisture content is 40~90%, while with a certain amount of silt solid.
In the present invention, in step (1), the desiccation is this field routine operation, for tentatively removing in oily sludge
Moisture；The moisture content of oily sludge after the desiccation is preferably less than 35%.
In the present invention, in step (1), the preliminary pyrolytic reaction preferably carries out under anoxybiotic or oxygen lean conditions.
In the present invention, in step (2), preferably also O is passed through into second pyrolysis reactor2；The O2For working as
Play the role of during the too low situation of existing reaction temperature it is combustion-supporting, to promote the reaction temperature of the secondary pyrolytic reaction.
In the present invention, in step (2), preferably also N is passed through into second pyrolysis reactor2；The N2For working as
Play the role of pressing down combustion during the excessively high situation of existing reaction temperature, to reduce the reaction temperature of the secondary pyrolytic reaction.
In the present invention, whether discharge is reached for oil content in the curing pyrolytic carbon after processing and content of beary metal
The judgement of standard is according to chinese national standard GB4284-1984《Pollutant catabolic gene standard in agricultural sludge》It carries out.
On the basis of common knowledge of the art, above-mentioned each optimum condition can be combined arbitrarily to get each preferable reality of the present invention
Example.
The positive effect of the present invention is：The oily sludge substep pyrolysis treatment apparatus and technique of the present invention can be
The cleaning, is innoxious of oily sludge, recycling treatment are realized under different pyrolysis temperatures and atmosphere, with conventional pyrolysis technology ratio
Compared with, its oil content of pyrolysis residue ＜ 0.3% that the present invention generates, and heavy metal element is cured to and is wherein difficult to leach, pyrolysis
Residue reaches the standard of ordinary solid waste in itself, can directly landfill disposal without generating secondary pollution；It is in addition, of the invention
Both the pyrolysis oil in oily sludge can have been recycled as merchantable fuel(s) oil, it can also be excellent together with the combustible gas of recycling by pyrolysis oil
It is first used for internal system heat supply to avoid additional energy consumption, realizes recycling for resource and energy；The present invention has both society
Meeting benefit and economic benefit, have broad application prospects.
Description of the drawings
Fig. 1 is the oily sludge substep pyrolysis treatment systems flow diagram of the embodiment of the present invention 1.
Reference sign：
The first pyrolysis reactors of 10-,
The second pyrolysis reactors of 20-,
30- heat exchangers, 31- column for smoke purification,
40- heat supply combustion furnaces,
50- steam-water separators,
61- level-one oil-gas condensers, 62- two level oil-gas condensers,
70- gas-liquid separators, 71- combustible gas washing, purifying devices, 72- fuel oil storage devices.
Specific embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
In various embodiments of the present invention, for curing oil content and catalyst in pyrolytic carbon after oily sludge and its pyrolysis processing
Whether the detection of content is carried out according to field conventional method, exceeded for oil content in curing pyrolytic carbon and content of beary metal
Criterion is according to chinese national standard GB4284-1984《Pollutant catabolic gene standard in agricultural sludge》It carries out.
Embodiment 1
As shown in Figure 1, a kind of oily sludge substep pyrolysis treatment systems are present embodiments provided, it is anti-including the first pyrolysis
Answer device 10, the second pyrolysis reactor 20, heat exchanger 30, heat supply combustion furnace 40, steam-water separator 50, level-one oil-gas condenser
61st, two level oil-gas condenser 62 and gas-liquid separator 70；The gas phase discharge port of first pyrolysis reactor 10 and the carbonated drink
Separator 50 connects, and the solid phase discharge port of first pyrolysis reactor 10 and the solid phase of second pyrolysis reactor 20 are fed
Mouthful connection, the exhanst gas outlet of first pyrolysis reactor 10 connect with the thermal fluid inlet of the heat exchanger 30, and described the
The gas phase discharge port of two pyrolysis reactors 20 and the level-one oil-gas condenser 61, the two level oil-gas condenser 62 and the gas
Liquid/gas separator 70 is sequentially connected, and the gaseous phase outlet of the steam-water separator 50 is connect with the level-one oil-gas condenser 61, described
Charging of the cold fluid outlet of the gaseous phase outlet of gas-liquid separator 70 and the heat exchanger 30 with the heat supply combustion furnace 40
Mouth connection, and the discharge port of the heat supply combustion furnace 40 is connect with the gas-phase feed mouth of second pyrolysis reactor 20；It is described
The hot fluid outlet ports of heat exchanger 30 are connect with column for smoke purification 31, gaseous phase outlet and the level-one of the steam-water separator 50
Oil-gas condenser 61 connects, and the discharge outlet of the steam-water separator 50 is connect with sewage disposal system, the gas-liquid separator 70
Gaseous phase outlet connect with combustible gas washing, purifying device 71, the liquid-phase outlet of the gas-liquid separator 70 and fuel oil storage device
72 connections.
The oily sludge substep pyrolysis processing technique of the present embodiment includes the following steps：
(1) oily sludge after desiccation is sent into the first pyrolysis reactor and carries out preliminary pyrolytic reaction, obtain high temperature cigarette
Oily sludge after gas, level-one pyrolysis oil gas and preliminary treatment, the high-temperature flue gas are passed through heat exchanger and after air heat-exchange points
Low-temperature flue gas and heating air are not obtained, and the low-temperature flue gas is handled through column for smoke purification to be absorbed, and the level-one pyrolysis oil gas is passed through
Steam-water separator is to remove the moisture of entrained with；
(2) oily sludge after the preliminary treatment is sent into the second pyrolysis reactor by fluid pressure type closed feeding machine
In, and be passed through reaction gas and carry out secondary pyrolytic reaction, obtain curing pyrolytic carbon and two level pyrolysis oil gas, the two level pyrolysis oil
Gas and treated after level-one pyrolysis oil gas mixes in oil-gas condenser through gas-liquid separator through the steam-water separator
Pyrolysis oil and combustible gas, the combustible gas mixed with the heating air be incorporated in burn in heat supply combustion furnace after be passed through described the
Two pyrolysis reactors；
(3) the curing pyrolytic carbon and the pyrolysis oil are recycled, you can；
Wherein, in step (1), the oily sludge is well site greasy filth, petroleum transferring station tank sludge, drilling well greasy filth and sludge containing
The mixing oily sludge of sand etc., oil content 15%, moisture content 50%；The moisture content of oily sludge after the desiccation is
35%, the preliminary pyrolytic reaction carries out under anoxybiotic or oxygen lean conditions, and the reaction temperature of the preliminary pyrolytic reaction is 480
DEG C, reaction time 25min；After testing, the oil recovery rate of the step (1) is 57.1%, gas production 20L/kg-1, gained
The oil content of oily sludge after preliminary treatment is 0.76%.
In step (2), the reaction temperature of the secondary pyrolytic reaction is 580 DEG C, reaction time 30min, the reaction
Gas is H2O；The oil recovery rate of the step (2) is 0.4%, gas production 16L/kg-1, the oil-containing of gained curing pyrolytic carbon
Rate is 0.07%, can direct landfill disposal.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, difference lies in：
In step (1), the reaction temperature of the preliminary pyrolytic reaction is 420 DEG C, reaction time 28min；After testing, institute
The oil recovery rate for stating step (1) is 58.3%, gas production 22L/kg-1, the oil content of the oily sludge after gained preliminary treatment
It is 0.53%.
In step (2), the reaction temperature of the secondary pyrolytic reaction is 550 DEG C, reaction time 30min, the reaction
Gas is H2O and O2；The oil recovery rate of the step (2) is 0.6%, gas production 15L/kg-1, gained curing pyrolytic carbon
Oil content is 0.14%, can direct landfill disposal.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, difference lies in：
In step (1), the reaction temperature of the preliminary pyrolytic reaction is 550 DEG C, the reaction time for 30min after testing, institute
The oil recovery rate for stating step (1) is 61.3%, gas production 28L/kg-1, the oil content of the oily sludge after gained preliminary treatment
It is 0.41%.
In step (2), the reaction temperature of the secondary pyrolytic reaction is 600 DEG C, reaction time 30min, the reaction
Gas is H2O and N2；The oil recovery rate of the step (2) is 0.47%, gas production 25L/kg-1, gained curing pyrolytic carbon
Oil content for 0.08%, can direct landfill disposal.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (10)
1. a kind of oily sludge substep pyrolysis treatment systems, which is characterized in that it includes the first pyrolysis reactor, the second pyrolysis instead
Answer device, heat exchanger, heat supply combustion furnace, steam-water separator, oil-gas condenser and gas-liquid separator；First pyrolysis reactor
Gas phase discharge port connect with the steam-water separator, the solid phase discharge port of first pyrolysis reactor with described second pyrolysis
The solid phase feed inlet connection of reactor, the exhanst gas outlet of first pyrolysis reactor and the thermal fluid inlet of the heat exchanger
Connection, gas phase discharge port and the oil-gas condenser and the gas-liquid separator of second pyrolysis reactor are sequentially connected,
The gaseous phase outlet of the steam-water separator is connect with the oil-gas condenser, the gaseous phase outlet of the gas-liquid separator and the heat
Feed inlet of the cold fluid outlet of exchanger with the heat supply combustion furnace is connect, and the discharge port of the heat supply combustion furnace and institute
State the gas-phase feed mouth connection of the second pyrolysis reactor.
2. oily sludge substep pyrolysis treatment systems as described in claim 1, which is characterized in that first pyrolysis reactor
A fluid pressure type closed feeding machine is equipped between second pyrolysis reactor.
3. oily sludge substep pyrolysis treatment systems as described in claim 1, which is characterized in that the hot-fluid of the heat exchanger
Body outlet is connect with a column for smoke purification.
4. oily sludge substep pyrolysis treatment systems as described in claim 1, which is characterized in that the oil-gas condenser includes
Level-one oil-gas condenser and two level oil-gas condenser；
Preferably, the gaseous phase outlet of the steam-water separator is connect with the level-one oil-gas condenser, the steam-water separator
Discharge outlet is connect with sewage disposal system.
5. oily sludge substep pyrolysis treatment systems as described in claim 1, which is characterized in that the gas of the gas-liquid separator
Mutually outlet is connect with a combustible gas washing, purifying device.
6. oily sludge substep pyrolysis treatment systems as described in claim 1, which is characterized in that the liquid of the gas-liquid separator
Mutually outlet is connect with a fuel oil storage device.
7. a kind for the treatment of process applied such as claim 1~6 any one of them oily sludge substep pyrolysis treatment systems,
It is characterized in that, includes the following steps：
(1) oily sludge after desiccation is sent into the first pyrolysis reactor and carries out preliminary pyrolytic reaction, obtain high-temperature flue gas, one
Grade pyrolysis oil gas and preliminary treatment after oily sludge, the high-temperature flue gas be passed through heat exchanger with after air heat-exchange respectively it is low
Warm flue gas and heating air, the low-temperature flue gas is handled through column for smoke purification to be absorbed, and the level-one pyrolysis oil gas is passed through carbonated drink point
From device to remove the moisture of entrained with；
(2) oily sludge after the preliminary treatment is sent into the second pyrolysis reactor, and is passed through H2It is anti-that O carries out secondary pyrolysis
Should, obtain curing pyrolytic carbon and two level pyrolysis oil gas, two level pyrolysis oil gas and through the steam-water separator treated institute
It states and obtains pyrolysis oil and combustible gas, the combustible gas and institute through gas-liquid separator after level-one pyrolysis oil gas mixes in oil-gas condenser
State heating air mix be incorporated in heat supply combustion furnace burn after be passed through second pyrolysis reactor；
(3) the curing pyrolytic carbon and the pyrolysis oil are recycled, you can；
Wherein, in step (1), the reaction temperature of the preliminary pyrolytic reaction is 420~550 DEG C, the reaction time for 25~
30min；
In step (2), the reaction temperature of the secondary pyrolytic reaction is 550~600 DEG C, reaction time 30min.
8. treatment process as claimed in claim 7, which is characterized in that in step (1), oily sludge after the desiccation contains
Water rate is less than 35%.
9. treatment process as claimed in claim 7, which is characterized in that in step (1), the preliminary pyrolytic reaction in anoxybiotic or
It is carried out under oxygen lean conditions.
10. treatment process as claimed in claim 7, which is characterized in that in step (2), pass through a fluid pressure type closed feeding machine
Oily sludge after the preliminary treatment is sent into second pyrolysis reactor；
And/or in step (2), also O is passed through into second pyrolysis reactor2；
And/or in step (2), also N is passed through into second pyrolysis reactor2。
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