CN108892348A - A kind of oily sludge synchronizes the method and device of dehydration oil recovery - Google Patents
A kind of oily sludge synchronizes the method and device of dehydration oil recovery Download PDFInfo
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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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
- 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)
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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
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/70—Catalyst aspects
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Abstract
The present invention provides a kind of method and devices of the synchronous dehydration oil recovery of oily sludge.This method is：Oily sludge is mixed with conditioning medicament and is preheated；Then further heating makes oily sludge and conditioning medicament carry out hydro-thermal reaction acquisition hydro-thermal greasy filth；Then it is flashed rapidly, realizes the separation of water vapour, oil gas and solid phase residue, the flash steam of generation realizes heat recovery for preheating；Flash distillation greasy filth after separation carries out filter-press dehydration, obtains solid phase residue and liquid phase oil water mixture, oil water mixture stratification, upper layer oil recovery, lower layer's recycling organic wastewater；Wherein, the conditioning medicament is made of thermometal oxide, catalyst and demulsifier.The technique can reach preferable decrement and oil recovery effect under lower hydrothermal temperature, greatly reduce energy consumption of reaction, and the waste liquid COD of generation is greatly lowered, and toxicity reduces, and is easy to biochemical treatment.
Description
Technical field
The invention belongs to the environmental protection technical fields of Petroleum and Petrochemical Industry, are related to a kind of synchronous be dehydrated of oily sludge and recycle
The method and device of oil.
Background technique
Oil field and oil plant generate every year and accumulate a large amount of oily sludge, such as in crude oil dehydration, drain sump, oil storage tank
Oil separator bed mud, the floation tank generated with the tank bottom mud of the generations such as slop tank and oil field and the sewage farm of oil plant is floating
Slag and biochemical section sludge etc..The general oil content of these greasy filth is high (3-50%), and ingredient is sufficiently complex；And greasy filth particle is tiny, is in
Floccule body shape, moisture content is high, retention ability is strong, and mud, oil, water phase are mutually bundled together, and fully emulsified, and viscosity is larger, it is difficult to de-
Water is not easy to realize oil-water-mud three phase separation.The recycling oil tech of oily sludge dehydration at present mainly has high-temperature steam spray, is molten
Agent extraction, pyrolysis and thermal desorption, above-mentioned technology can realize the dehydration oil recovery of High water cut greasy filth, but high-temperature steam spraying technique
Operating cost is high, treating capacity is small, and then extractant recycling is difficult for solvent extraction, and is pyrolyzed thermal desorption processing energy consumption height and has secondary dirt
Dye.Moisture percentage in sewage sludge can be further reduced to 50% hereinafter, but since it directly utilizes thermal energy by sludge water by heat drying technology
Divide rapid evaporation, therefore huge energy consumption, while operation difficulty and cost of investment are very high, and oil gas cannot be recycled effectively.Water absorbing agent
Curing and drying technical operation is simple, but reagent cost is too high, and treating capacity is small.And solar energy desiccation technology energy consumption is small, Operation and Maintenance
Simply, operational and administrative expenses is low, but it takes up a large area, and treatment effect is larger by weather and seasonal effect, in most instances
There is foul smell generation.
Sludge hydrothermal technology be by sludge under higher temperature and pressure (100 DEG C, 0.101MPa or more), make dirt
Sticky hydrolysis of organic matter in mud, destroys the colloform texture of sludge, is effectively improved dewatering performance of sludge.Not according to hydrothermal temperature
Together, and it is divided into pyrohydrolysis (100-180 DEG C), hydro-thermal charing (180-220 DEG C, 1.0-2.32MPa), hydrothermal liquefaction (220-370
DEG C, 2.32-21.05MPa), hydro-thermal gasification (>373.94 DEG C,>22.06MPa).Pyrohydrolysis can make part SOLID ORGANIC in greasy filth
Object dissolution, larger molecular organics hydrolysis and wadding body crack, to realize the separation of oil, water and mud, and then are added using mechanical equipment
Fast solid-liquor separation；Hydro-thermal charing can make sludge coked, and generate a small amount of fluid oil and gas；Hydrothermal liquefaction makes sludge in liquid
State；And hydro-thermal gasification temperature has sludge mainly in the form of fuel gas due to the critical point more than water.After pyrohydrolysis combines
Continuous preprocessing means of the dewatering process as municipal sludge, can make moisture percentage in sewage sludge drop to 50% hereinafter, just gradually being gone
The approval of industry.
The hydrothermal treatment process of oily sludge perfect at present is less, and reaction temperature is usually higher, and oil recycling is difficult, and produces
Raw organic wastewater bio-toxicity is big, and processing difficulty is high.High, the big feature of processing difficulty based on oily sludge oil content, and
From the point of view of process safety, energy conservation, sewage treatment and resource reclaim, the pyrohydrolysis technology of lower temperature can make greasy filth
Viscosity is greatly reduced, and organic matter does not crack, and will not generate fixed gas, foul gas and hardly degraded organic substance, is conducive to contain
The minimizing of oily sludge, innoxious and recycling are realized in the processing of the dehydration of greasy dirt and the depth desiccation of residue and waste water.
Therefore exploitation low temperature, to mention oily drying technique meaningful for the dehydration of cost-efficiently greasy filth hydro-thermal.
Summary of the invention
Based on above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of synchronous dehydrations of oily sludge
The device of oil recovery；The object of the invention is also to provide the sides for synchronizing dehydration oil recovery to oily sludge using the device
Method, low energy consumption for the process, treatment effeciency is high, can be realized residue moisture content≤50% after processing, and mineral oil effectively recycles,
Solid waste volume reduction rate reaches 70% or more.
The purpose of the present invention is achieved by the following technical programs：
On the one hand, the present invention provides a kind of method that oily sludge synchronizes dehydration oil recovery comprising following steps：
Oily sludge is mixed with conditioning medicament and is preheated by step 1；
Step 2, the mixed liquor of oily sludge and conditioning medicament after preheating, which further heats, makes oily sludge and conditioning medicine
Agent carries out hydro-thermal reaction and obtains hydro-thermal greasy filth；
Step 3 flashes rapidly hydro-thermal greasy filth at the reaction temperatures, realizes water vapour, oil gas and solid phase residue
Separation flashes 3-10 times of volume expansion, and the flash steam (pressure 0.3-1.0MPa, 95-100 DEG C of temperature) of generation is for step 1
Heat recovery is realized in preheating；Flash distillation greasy filth after separation carries out filter-press dehydration, obtains solid phase residue and liquid phase oil water mixture, oil
The recycling of oil is realized on aqueous mixtures stratification, upper layer, and lower layer realizes the recycling of organic wastewater, is transported to sewage treatment as carbon source
Factory；
Wherein, the conditioning medicament is made of thermometal oxide, catalyst and demulsifier.
In above-mentioned method, organic wastewater takes different modes to dispose depending on field condition.It, can if nearby there is sewage treatment plant
Organic wastewater is delivered to sewage treatment plant's processing, such as without sewage treatment plant, then using techniques such as materialization, biochemistry, advanced treatings
Reuse or standard discharge are realized in processing.It is removed, or returned using biodegradable mode after the VOCs generated in treatment process is collected
Receive centralized processing disposition.
In above-mentioned method, the oil of recycling can be using after butterfly centrifugal machine refinement treatment times system or sale；After desiccation
Solid phase residue can be used as auxiliary fuel, prepare adsorbent or reclaimed rubber additive etc. realizes its recycling, can also pass through
It burns, its minimizing, innoxious is realized in the processing such as pyrolysis.
In above-mentioned method, it is preferable that the quality by the conditioning medicament is in terms of 100%, which includes 5%-
10% thermometal oxide, the catalyst of 60%-80% and the demulsifier of 10%-30%.
In above-mentioned method, it is preferable that the conditioning medicament additional amount is the 0.3%- of the oily sludge quality
2.0%.
In above-mentioned method, it is preferable that the thermometal oxide includes calcium oxide, iron oxide, titanium oxide, molybdenum oxide
With one of zinc oxide etc. or a variety of combinations.
In above-mentioned method, it is preferable that the catalyst includes sodium chloride, sodium carbonate, calcium chloride, calcium hydroxide and silicic acid
One of sodium etc. or a variety of combinations.The catalyst is polyelectron electrolyte, can reduce hydrothermal temperature, pressure, is reduced
Energy consumption of reaction.
In above-mentioned method, it is preferable that the demulsifier be ionic surface active agent include carboxylate, sulfate, polyethers,
One of quaternary ammonium salt and sulfonate etc. or a variety of combinations.It is further preferred that the demulsifier is lauryl sodium sulfate.It should
The effect of demulsifier, mainly promotes the demulsification of greasy filth, realizes that grease efficiently separates.
In above-mentioned method, it is preferable that in step 1, preheating is using being able to carry out electric preheating, steam preheating, microwave
The preheating can of preheating or conduction oil preheating.It can first be passed through steam preheating or other modes heating when starting, adopted after continuous operation
It is preheated with the oil gas of subsequent flash distillation recycling, to save the energy consumption of subsequent technique.
In above-mentioned method, it is preferable that preheating temperature is 90-99 DEG C.
In above-mentioned method, it is preferable that in step 2, hydro-thermal reaction using be able to carry out electric heating, steam heating,
Microwave heating or heat-conducting oil heating and the reaction kettle that can be stirred.
In above-mentioned method, it is preferable that the temperature of hydro-thermal reaction is 120-200 DEG C, pressure 0.2-1.45MPa, stirring
Time is 10-50min.It is dissolved by the solid organic matters (colloid, asphalitine class) after hydro-thermal process in High water cut greasy filth, big point
Sub- hydrolysis of organic matter is small organic molecule, wadding body cracks the three phase separation for realizing oil, water and mud.
In above-mentioned method, it is preferable that in step 3, filter-press dehydration is using high-pressure pressure filter, the high pressure filters pressing
Machine squeeze to filter plate by hydraulic cylinder realizes greasy filth dehydration.
In above-mentioned method, it is preferable that the high-pressure pressure filter dewatering pressure is 0.5-2.0MPa；Dewatering time is 30-
240min。
On the other hand, the present invention also provides a kind of device of the synchronous dehydration oil recovery of oily sludge, which includes：
Preheating unit, reaction member, flash evaporation unit, dewatering unit and recovery unit；
The preheating unit, the reaction member, the flash evaporation unit and the dewatering unit are sequentially connected logical；
The preheating unit is used to preheat oily sludge and conditioning medicament；
The reaction member reacts oily sludge with conditioning medicament progress pyrohydrolysis for heating stirring；
The flash evaporation unit is used for the separation of water vapour, oil gas and solid phase residue, and the flash distillation that the flash evaporation unit generates
Vapour is back to recycling of the preheating unit for heat；
Removing of the dewatering unit for moisture in oily sludge；The recovery unit is for liquid phase oil water mixture
It is layered simultaneously oil recovery phase；
The conditioning medicament is made of thermometal oxide, catalyst and demulsifier.
The present invention has following beneficial effect：
(1) moisture content declines to a great extent after handling, and volume substantially reduces, conducive to the depth desiccation and further recycling of greasy filth
Using and disposition；
(2) can effective oil recovery, realize resource reclaim, and after quenched release agent is added, the oily rate of recovery can be improved 20%
More than；
(3) treatment temperature at 200 DEG C hereinafter, and be able to carry out part of waste heat recycling, reduce energy consumption and processing cost,
Security risk is low；
(4) greasy filth is not necessarily to pre-treatment, and simple process is high-efficient；
(5) relative to high temperature (230 DEG C or more) hydro-thermal process, the fixed gas amount that 200 DEG C or less Low Temperature Thermal hydrolysis generate subtracts
It is few, ordorless smell；Organic matter charing is few in solid phase, and the waste liquid COD of generation is greatly lowered, and toxicity reduces, and is easy to biochemical
Processing；
(6) high-pressure pressure filter that the present invention uses, for pressure up to 10MPa or more, dehydrating effect is good, while recyclable part
Oil.
Detailed description of the invention
Fig. 1 is the device of the synchronous dehydration oil recovery of oily sludge in the embodiment of the present invention；
Accompanying drawings symbol description：
1 preheating can, 2 hydrothermal reaction kettles, 3 flash tanks, 4 high-pressure pressure filters, 5 recycling cans.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment 1
The present embodiment provides a kind of device of the synchronous dehydration oil recovery of oily sludge, which includes：
Preheating unit, reaction member, flash evaporation unit, dewatering unit and recovery unit；
The preheating unit, the reaction member, the flash evaporation unit and the dewatering unit are sequentially connected logical；
The preheating unit is used to preheat oily sludge and conditioning medicament；
The reaction member reacts oily sludge with conditioning medicament progress pyrohydrolysis for heating stirring；
The flash evaporation unit is used for the separation of water vapour, oil gas and solid phase residue, and the flash distillation that the flash evaporation unit generates
Vapour is back to recycling of the preheating unit for heat；
Removing of the dewatering unit for moisture in oily sludge；The recovery unit is for liquid phase oil water mixture
It is layered simultaneously oil recovery phase.
In one preferred embodiment of the present embodiment, as shown in Figure 1, the preheating unit be able to carry out electric preheating,
The preheating can 1 of steam preheating, microwave preheating or conduction oil preheating；The reaction member be able to carry out electric heating, steam heating,
Microwave heating or heat-conducting oil heating and the hydrothermal reaction kettle 2 that can be stirred；The flash evaporation unit is a flash tank 3, be can be used in
Carry out the separation of water vapour, oil gas and solid phase residue；The dewatering unit is high-pressure pressure filter 4, which is autonomous
Research and development, be squeeze to filter plate by hydraulic cylinder realizing greasy filth dehydration, pressure is up to 10MPa or more, dehydrating effect
It is good, while recyclable part oil；The recovery unit is a recycling can 5, which can be realized point of oil water mixture
The recycling of oil is realized on layer, upper layer, and lower layer's organic wastewater is transported to sewage treatment plant as carbon source and utilizes.
Embodiment 2
The present embodiment provides a kind of methods of the synchronous dehydration oil recovery of oily sludge, use the device of embodiment 1, specifically
Include the following steps：
Step 1, by the conditioning of dross greasy filth (moisture content 80-85%) 500g of a certain oil recovery factory of Xinjiang Oilfield and 2.5g
Medicament (5% calcium oxide, 70% sodium chloride and 25% lauryl sodium sulfate) be injected into preheating can and be preheating to 90-99
℃；
The mixed liquor of step 2, oily sludge and conditioning medicament after preheating is injected into hydrothermal reaction kettle, is added by electricity
Greasy filth is heated to 120-180 DEG C by heat, is reacted 20-50 minutes, and hydro-thermal greasy filth is obtained；
Hydro-thermal greasy filth is injected into rapidly the separation that flash tank carries out water vapour, oil gas and solid phase residue, generated by step 3
Flash steam be back to the preheating can in step 1 realize heat recovery；Flash distillation greasy filth after separation enter in high-pressure pressure filter into
Row filter-press dehydration obtains solid phase residue and liquid phase oil water mixture, and oil water mixture enters recycling can stratification, and upper layer is realized
The recycling of oil, lower layer realize the recycling of organic wastewater；
It is 45.3%-49.8%, volume reduction rate 71%-76% that residue moisture content is obtained in the present embodiment, after filter-press dehydration, is returned
The oily phase rate of recovery after contracture layer is 65.3%-72.3%, and it is 35.5%- that flash steam, which is back to the energy recovery rate in preheating can,
42.8%.The liquor C OD that the present embodiment generates<5000mg/L, bio-toxicity are lower；It is less and ordorless to generate fixed gas amount
Taste.
Embodiment 3
The present embodiment provides a kind of methods of the synchronous dehydration oil recovery of oily sludge, use the device of embodiment 1, specifically
Include the following steps：
Step 1, by the conditioning of dross greasy filth (moisture content 75%-80%) 500g of a certain oil recovery factory of Xinjiang Oilfield and 5g
Medicament (5% calcium oxide, 70% sodium carbonate and 25% lauryl sodium sulfate) be injected into preheating can and be preheating to 90-99
℃；
Step 2, oily sludge and conditioning medicament mixed liquor after preheating are injected into hydrothermal reaction kettle, are passed through 0.45-
The saturated vapor of 1.45MPa reacts 10-40 minutes, obtains hydro-thermal greasy filth；
Hydro-thermal greasy filth is injected into rapidly the separation that flash tank carries out water vapour, oil gas and solid phase residue, generated by step 3
Flash steam be back to the preheating can in step 1 realize heat recovery；Flash distillation greasy filth after separation enter in high-pressure pressure filter into
Row filter-press dehydration obtains solid phase residue and liquid phase oil water mixture, and oil water mixture enters recycling can stratification, and upper layer is realized
The recycling of oil, lower layer realize the recycling of organic wastewater；
It is 41.5%-46.3%, volume reduction rate 72%-78% that residue moisture content is obtained in the present embodiment, after filter-press dehydration, is returned
The oily phase rate of recovery after contracture layer is 68.2%-74.6%, and it is 35.2%- that flash steam, which is back to the energy recovery rate in preheating can,
40.3%.The liquor C OD that the present embodiment generates<5000mg/L, bio-toxicity are lower；It is less and ordorless to generate fixed gas amount
Taste.
Embodiment 4
The present embodiment provides a kind of methods of the synchronous dehydration oil recovery of oily sludge, use the device of embodiment 1, specifically
Include the following steps：
Step 1, by the tune of viscous crude dross (moisture content 70%-75%) 500g of a certain oil recovery factory in Liaohe Oil Field and 7.5g
Reason medicament (5% calcium oxide, 70% calcium chloride and 25% lauryl sodium sulfate) be injected into preheating can and be preheating to 90-
99℃；
The mixed liquor of step 2, oily sludge and conditioning medicament after preheating is injected into hydrothermal reaction kettle, is added by electricity
Greasy filth is heated to 120-200 DEG C by heat, is reacted 10-40 minutes, and hydro-thermal greasy filth is obtained；
Hydro-thermal greasy filth is injected into rapidly the separation that flash tank carries out water vapour, oil gas and solid phase residue, generated by step 3
Flash steam be back to the preheating can in step 1 realize heat recovery；Flash distillation greasy filth after separation enter in high-pressure pressure filter into
Row filter-press dehydration obtains solid phase residue and liquid phase oil water mixture, and oil water mixture enters recycling can stratification, and upper layer is realized
The recycling of oil, lower layer realize the recycling of organic wastewater；
It is 32.5%-38.3%, volume reduction rate 78.5%- that residue moisture content is obtained in the present embodiment, after filter-press dehydration
83.2%, the oily phase rate of recovery after recycling layering is 67.2%-75.3%, and flash steam is back to the energy recovery rate in preheating can
For 36.7%-41.2%.The liquor C OD that the present embodiment generates<5000mg/L, bio-toxicity are lower；It is less to generate fixed gas amount,
And no foul smell.
Comparative example 1
This comparative example is the comparative experiments of embodiment 2, which provides a kind of synchronous dehydration oil recovery of oily sludge
Method uses the device of embodiment 1, specifically includes following steps：
Dross greasy filth (moisture content 80%-85%) 500g of a certain oil recovery factory of Xinjiang Oilfield is injected into preheating by step 1
90-99 DEG C is preheating in tank；
Step 2, the oily sludge after preheating are injected into hydrothermal reaction kettle, and greasy filth is heated to 140- by electric heating
It 180 DEG C, reacts 20-50 minutes, obtains hydro-thermal greasy filth；
Hydro-thermal greasy filth is injected into rapidly the separation that flash tank carries out water vapour, oil gas and solid phase residue, generated by step 3
Flash steam be back to the preheating can in step 1 realize heat recovery；Flash distillation greasy filth after separation enter in high-pressure pressure filter into
Row filter-press dehydration obtains solid phase residue and liquid phase oil water mixture, and oil water mixture enters recycling can stratification, and upper layer is realized
The recycling of oil, lower layer realize the recycling of organic wastewater；
It is 55.3%-59.7%, volume reduction rate 61%-67% that residue moisture content is obtained in the present embodiment, after filter-press dehydration, is returned
The oily phase rate of recovery after contracture layer is 32.1%-35.3%, and it is 34.5%- that flash steam, which is back to the energy recovery rate in preheating can,
40.8%.The liquor C OD that the present embodiment generates<5000mg/L, bio-toxicity are lower；It is less and ordorless to generate fixed gas amount
Taste.
Comparative example 2
This comparative example is the comparative experiments of embodiment 2, which provides a kind of synchronous dehydration oil recovery of oily sludge
Method uses the device of embodiment 1, specifically includes following steps：
Dross greasy filth (moisture content 80%-85%) 500g of a certain oil recovery factory of Xinjiang Oilfield is injected into preheating by step 1
90-99 DEG C is preheating in tank；
Step 2, the oily sludge after preheating are injected into hydrothermal reaction kettle, and greasy filth is heated to 230- by electric heating
It 260 DEG C, reacts 20-50 minutes, obtains hydro-thermal greasy filth；
Hydro-thermal greasy filth is injected into rapidly the separation that flash tank carries out water vapour, oil gas and solid phase residue, generated by step 3
Flash steam be back to the preheating can in step 1 realize heat recovery；Flash distillation greasy filth after separation enter in high-pressure pressure filter into
Row filter-press dehydration obtains solid phase residue and liquid phase oil water mixture, and oil water mixture enters recycling can stratification, and upper layer is realized
The recycling of oil, lower layer realize the recycling of organic wastewater；
It is 46.2%-51.7%, volume reduction rate 69%-73% that residue moisture content is obtained in the present embodiment, after filter-press dehydration, is returned
The oily phase rate of recovery after contracture layer is 52.1%-65.3%, and it is 28.1%- that flash steam, which is back to the energy recovery rate in preheating can,
31.2%.The liquor C OD that the present embodiment generates>20000mg/L, bio-toxicity are severe toxicity；Generate a large amount of foul gas.
Show technique of the invention under lower reaction temperature (200 DEG C) with comparative example experiment through the foregoing embodiment
For residue moisture content less than 60%, volume reduction rate reaches 60% or more after can be realized processing, and oil mutually 30% or more recycling is recycled certain
Energy and reduce energy consumption.If further promoted decrement and oil recovery effect, hydrothermal temperature need to be promoted to 220-250 DEG C with
On, along with the consumption of big energy.But after adding conditioner, hydro-thermal reaction is under lower hydrothermal temperature (200 DEG C)
Reach preferable decrement and oil recovery effect, greatly reduces energy consumption of reaction, and the waste liquid COD generated is greatly lowered, and poison
Property reduce, be easy to biochemical treatment.
Claims (10)
1. a kind of method of the synchronous dehydration oil recovery of oily sludge comprising following steps：
Oily sludge is mixed with conditioning medicament and is preheated by step 1；
The mixed liquor of step 2, oily sludge after preheating and conditioning medicament further heat make oily sludge with improve medicament into
Row hydro-thermal reaction obtains hydro-thermal greasy filth；
Step 3 flashes rapidly hydro-thermal greasy filth at the reaction temperatures, realizes point of water vapour, oil gas and solid phase residue
From heat recovery is realized in preheating of the flash steam of generation for step 1；Flash distillation greasy filth after separation carries out filter-press dehydration, obtains
The recycling of oil is realized on solid phase residue and liquid phase oil water mixture, oil water mixture stratification, upper layer, and lower layer realizes organic wastewater
Recycling；
Wherein, the conditioning medicament is made of thermometal oxide, catalyst and demulsifier.
2. according to the method described in claim 1, it is characterized in that：Quality by the conditioning medicament is the conditioning in terms of 100%
Medicament includes the thermometal oxide, the catalyst of 60%-80% and the demulsifier of 10%-30% of 5%-10%.
3. method according to claim 1 or 2, it is characterised in that：The conditioning medicament additional amount is the oily sludge
The 0.3%-2.0% of quality.
4. method according to claim 1 or 2, it is characterised in that：The thermometal oxide includes calcium oxide, oxidation
One of iron, titanium oxide, molybdenum oxide and zinc oxide or a variety of combinations.
5. method according to claim 1 or 2, it is characterised in that：The catalyst includes sodium chloride, sodium carbonate, chlorination
One of calcium, calcium hydroxide and sodium metasilicate or a variety of combinations.
6. method according to claim 1 or 2, it is characterised in that：The demulsifier is ionic surface active agent, including carboxylic
One of hydrochlorate, sulfate, polyethers, quaternary ammonium salt and sulfonate or a variety of combinations；
Preferably, the demulsifier is lauryl sodium sulfate.
7. according to the method described in claim 1, it is characterized in that：In step 1, preheating using be able to carry out electric preheating,
The preheating can of steam preheating, microwave preheating or conduction oil preheating；
Preferably, preheating temperature is 90-99 DEG C.
8. according to the method described in claim 1, it is characterized in that：In step 2, hydro-thermal reaction is using being able to carry out electricity
Heating, steam heating, microwave heating or heat-conducting oil heating and the reaction kettle that can be stirred；
Preferably, the temperature of hydro-thermal reaction is 120-200 DEG C, pressure 0.2-1.45MPa, mixing time 10-50min.
9. according to the method described in claim 1, it is characterized in that：In step 3, filter-press dehydration using high-pressure pressure filter,
The high-pressure pressure filter squeeze to filter plate by hydraulic cylinder realizes greasy filth dehydration；
Preferably, which is 0.5-2.0MPa；Dewatering time is 30-240min.
10. a kind of device of the synchronous dehydration oil recovery of oily sludge, the device include：
Preheating unit, reaction member, flash evaporation unit, dewatering unit and recovery unit；
The preheating unit, the reaction member, the flash evaporation unit and the dewatering unit are sequentially connected logical；
The preheating unit is used to preheat oily sludge and conditioning medicament；
The reaction member reacts oily sludge with conditioning medicament progress pyrohydrolysis for heating stirring；
The flash evaporation unit is used for the separation of water vapour, oil gas and solid phase residue, and the flash steam that the flash evaporation unit generates returns
It flow to recycling of the preheating unit for heat；
Removing of the dewatering unit for moisture in oily sludge；The recovery unit is used for the layering of liquid phase oil water mixture
And oil recovery phase；
The conditioning medicament is made of thermometal oxide, catalyst and demulsifier.
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