CN107699332A - A kind of waste lubricating oil extraction tower pitch discharge method - Google Patents

A kind of waste lubricating oil extraction tower pitch discharge method Download PDF

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Publication number
CN107699332A
CN107699332A CN201710862611.0A CN201710862611A CN107699332A CN 107699332 A CN107699332 A CN 107699332A CN 201710862611 A CN201710862611 A CN 201710862611A CN 107699332 A CN107699332 A CN 107699332A
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CN
China
Prior art keywords
pitch
propane
extraction tower
lubricating oil
waste lubricating
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710862611.0A
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Chinese (zh)
Inventor
张家彬
Original Assignee
张家彬
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN2017107022077 priority Critical
Priority to CN201710702207 priority
Application filed by 张家彬 filed Critical 张家彬
Publication of CN107699332A publication Critical patent/CN107699332A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/005Working-up used lubricants to recover useful products ; Cleaning using extraction processes; apparatus therefor
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00Purification; Separation; Use of additives
    • C07C7/005Processes comprising at least two steps in series
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00Purification; Separation; Use of additives
    • C07C7/10Purification; Separation; Use of additives by extraction, i.e. purification or separation of liquid hydrocarbons with the aid of liquids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10CWORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C3/00Working-up pitch, asphalt, bitumen
    • C10C3/08Working-up pitch, asphalt, bitumen by selective extraction
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0025Working-up used lubricants to recover useful products ; Cleaning by thermal processes
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0058Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor

Abstract

A kind of waste lubricating oil extraction tower pitch discharge method, the pitch that waste lubricating oil extraction tower bottom contains propane are discharged on the hot water pipeline that one is circulated, and hot water, propane and pitch enter back into settler and carries out three phase separation.

Description

A kind of waste lubricating oil extraction tower pitch discharge method
Technical field
The present invention relates to a kind of waste lubricating oil extraction tower pitch discharge method.This method belongs to petrochemical industry and environmental protection Technical field.
Background technology
Waste lubricating oil belongs to hazardous waste, and containing a large amount of carcinogens, toppling over will cause to seriously endanger to natural environment, combustion Burning can produce the harmful substances such as a large amount of dioxin, sulphur phosphorus organic compound.The component for there was only about 10% in waste lubricating oil goes bad, its Remaining most of hydro carbons composition is still the main viscosity composition of lubricating oil, after removing rotten thing and impurity, you can regeneration meets matter Desired lube base oil is measured, and regeneration rate can reach more than 70%.2012, China's lubricating oil real consumption amount was up to 8,500,000 Ton, calculated according to 20% proportion of goods damageds and 70% rate of recovery, every year at least recyclable 4,700,000 tons of waste lubricating oil, renewable lubrication More than 330 ten thousand tons of oil base oil.
China's waste lubricant oil regeneration industry starts to develop the sixties in last century, but backward in technique, and product quality is inferior.On The later stage eighties in century, since waste lubricant oil regeneration industry starts fast development, particularly 2000 year, waste lubricant oil regeneration enterprise Scale has very big lifting, still, however it remains manufacturing process is simple, secondary pollution is serious, base oil yield is relatively low, product quality The problems such as poor.In consideration of it, the National Development and Reform Commission have issued《Instructed on printing and distributing " 12 " comprehensive utilization of resources The notice of opinion and large solid waste comprehensive utilization embodiment》, notification waste lubricating oil reclaims and recycling It is the key industry for encouraging development, from October 31,1 day to 2018 November in 2013, to using the waste lubricating oil of recovery as raw material The industrial oil exempts from consumption tax such as the lube base oil of production, gasoline, diesel oil.Country supports useless profit by preferential tax policy Lubricating oil regenerates enterprise development, can both alleviate the pressure of China's oil resource scarcity, again regular distributors can be helped to spend Hard time, promote the sector industrialized development, improve the technical merit of the sector, reduce environmental pollution.
Solvent extraction early has an application in method for regenerating waste lubricating oil, common solvent have the lower carbon number hydrocarbons such as propane, butane or Their mixture of person, removes additive, colloid, asphalitine, solid impurity etc. in waste lubricating oil by extraction, removing this A little materials are a kind of mixtures of complicated component, and pitch is generally termed in industry.This pitch has very with traditional asphalt Big difference, especially sticky and softening point are up to more than 200 DEG C, are very easy to block extraction tower bottom and its discharge is passed through Pipeline and equipment.Particularly:Bitumen content in waste lubricating oil is very low, and typically not greater than 5%, with oil plant propane deasphalting The raw material of device-decompression residuum difference is very big, and about 50% pitch is usually contained in decompression residuum, and therefore, oil plant propane takes off Bitumen extraction tower is easy to form steady and continuous in tower reactor and has the pitch phase of preferable mobility, can be easily carried out boundary position Control and continuous discharge.And waste lubricating oil extraction tower is different, pitch is few and dry, using year treating capacity as 100,000 tons of waste lubricating oils Extraction tower exemplified by, its pitch yield about 625kg/h(0.7m3/h), the boundary position that so small yield is difficult to realize stabilization controls With continuous discharge, if allowing bottom of the pitch in extraction tower to save bit by bit to form continuous phase and maintain certain boundary position and be then exhausted from, Pitch will coalesce because the residence time is longer in bottom of towe, it is easy to cause bottom of towe to block, even if can discharge, because of flow rate of asphalt Too small, its softening point is again high, be also easy to block in the case of having insulation and heat tracing follow-up control valve, heat exchanger and Pipeline;If control pitch is discharged in relatively low boundary position and continuously, and inevitably makes to carry more propane in pitch, These propane vaporize after being discharged with pitch by boundary's level control valve reducing pressure by regulating flow, topical hypothermia can be caused, along with this drip Blue or green characteristic especially sticky, softening point is high, easily causes control valve, pipeline blockage, equally, this pitch for carrying more propane When by heat exchanger heating, because of the asphalt cement phase isolated propane vaporizes, heat exchanger and on the way can be blocked regularly Pipeline.Existing waste lubricating oil extraction tower pitch discharge technique, typically pitch(Contain more propane)From extraction tower bottom After discharge, control valve reducing pressure by regulating flow is first passed around, then is heated by heat exchanger, then enters pitch evaporating column and asphaltene stripper, Above-mentioned pitch blocking pipeline, heat exchanger, the valve even situation of tower necessarily occurs, is all brought to safety in production and continuous production Very big threat and difficulty.
The content of the invention
Technical solution of the present invention:Waste lubricating oil extraction tower bottom propane-asphalt mixture without any control valve and adds Hot equipment, it is directly discharged on the hot water pipeline that one is circulated;Hot water carries propane-pitch that extraction tower bottom is discharged and mixed Compound carries out flowing and transported, and provides the heat needed for propane vaporization, the heat needed for pitch heating;Hot water, propane and pitch Enter from the bottom of settler in settler, carry out three phase separation;The propane isolated at the top of settler throttles through control valve to drop Heel row is pressed to middle pressure(2.0MPa)Propane recovery system, the discharge rate of extraction tower bottom propane-asphalt mixture is exactly to lean on the control Valve processed is controlled;Settler middle and upper part is provided with screen pack, and hot water is circulated after filter screen isolates pitch into pump, and Consumed heat is heated by the vaporization of heat exchanger heat make-up propane and pitch;The pitch that settler bottom is isolated is settling Device and extraction tower isolate and be depressured after together with hot water discharge system.
Advantages of the present invention:
First, waste lubricating oil extraction tower bottom propane-asphalt mixture, without any control valve and firing equipment, it is directly discharged into On one hot water pipeline circulated, discharge path is short and does not have reducing pressure by regulating flow facility, and it is easy thoroughly to solve discharge pipe The problem of blocking;
Second, propane-asphalt mixture that hot water carrying extraction tower bottom is discharged carries out flowing and transported, the hot water of larger flow The mobility of material is not only ensure that, while also instead of heat exchanger, directly provides the heat needed for propane vaporization, pitch adds The required heat of heat, there would not be the situation of pitch blocking pipeline and heat exchanger again;
3rd, the discharge rate of extraction tower bottom propane-asphalt mixture is controlled by propane discharge control valve at the top of settler System, rather than set control valve to be directly controlled on propane-asphalt mixture discharge pipe, so, the circulation of control valve Medium just becomes single, clean propane from propane-asphalt mixture of complexity, and control is easily accurate, would not there is third again Alkane-asphalt mixture reducing pressure by regulating flow, vaporization cooling and the sticky blocking control valve of sticky pitch and the situation of pipeline;
4th, this method pitch can be separated merely through settler, it is no longer necessary to pitch evaporating column, asphaltene stripper this The complicated flow of sample, it is most simple also most reliable;
5th, existing waste lubricating oil extraction tower bottom pitch discharge method is the mobility for ensureing pitch, it will usually into pitch The easy flowing oil product of equivalent is blended into, the oil product being blended into generally just comes from waste lubricating oil, and being blended into the pitch after oil product can not meet to drip Blue or green quality index, production marketing is difficult, and significantly reduces the yield of reclaimed oil.This method, it is not necessary into pitch Any oil product is blended into, the yield of reclaimed oil can reach highest;
6th, existing method asphaltic products is storing and solidification is very easy in transportation, and this method asphaltic products is straight Normal temperature solid-state is connected in, is easy to store and transports, is easy to be sold as the additive of different kinds of roads pitch.
Brief description of the drawings
Fig. 1 is the method schematic diagram of the present invention.
In figure:A is that extraction tower bottom, B are that settler, C are that pump, D are that heater, E are that control valve, F1 are valves Door, F2 are that valve, F3 are that valve, G are screen packs, 1 are propane-asphalt mixtures, 2 are to carry propane-asphalt mixture Hot water, 3 be hot water.
Embodiment
Propane-asphalt mixture 1 is immediately discharged to carry on the hot water pipeline 2 of propane-asphalt mixture;Hot water carries Propane-asphalt mixture enters settler B from bottom;Propane, hot water, pitch carry out three phase separation in settler B;Third Alkane is discharged into middle pressure propane recovery system through control valve E;Hot water enters pump C after screen pack G intercepts lower pitch, carries Circulated after pressure into heater D after heating medium for heating.Through after a period of time, closing valve F1 and F2 by settler B Isolate with extraction tower A and be depressured settler B, then open valve F3, discharge pitch.
Embodiment one:
4.1 MPaG, 90 DEG C, 6t/h hot water 3, after pump C boosts to 4.2 MPaG, into heater D, hot water quilt After being heated to 95 DEG C, mixed with 0.6t/h propane-asphalt mixture of extraction tower bottom A discharges, hot water carries propane-pitch Mixture enters settler B bottoms through pipeline 2, and pitch is gradually assembled in settler B bottoms, and hot water passes through filter screen G Enter pump C circulations after isolating pitch, propane is assembled at settler B top and continuously discharged through control valve E.8 is small Shi Hou, valve F1 are closed, and valve F2 is closed, and valve F3 is opened, the 2.4t pitches of ejecting/collecting.

Claims (5)

  1. A kind of 1. waste lubricating oil extraction tower pitch discharge method, it is characterised in that:Waste lubricating oil extraction tower bottom contains propane Pitch is discharged on the hot water pipeline that one is circulated, and hot water, propane and pitch enter back into settler and carries out three phase separation.
  2. 2. according to a kind of waste lubricating oil extraction tower pitch discharge method described in claim 1, it is characterised in that useless lubrication The pitch that oil extraction tower bottom contains propane is directly discharged into one heat circulated without any control valve and firing equipment On waterpipe.
  3. 3. according to a kind of waste lubricating oil extraction tower pitch discharge method described in claim 1, it is characterised in that hot water is taken The pitch containing propane discharged with extraction tower bottom carries out flowing and transported, and provides heat, pitch needed for propane vaporization Heat needed for heating.
  4. 4. according to a kind of waste lubricating oil extraction tower pitch discharge method described in claim 1, it is characterised in that settler The propane that top is isolated contains the pitch of propane through control valve reducing pressure by regulating flow heel row to propane recovery system, extraction tower bottom Discharge rate is exactly to be controlled by the control valve.
  5. 5. according to a kind of waste lubricating oil extraction tower pitch discharge method described in claim 1, it is characterised in that settler Middle and upper part is provided with screen pack, and hot water is circulated after filter screen isolates pitch into pump, and passes through heat exchanger heat make-up Propane vaporizes and pitch heats consumed heat.
CN201710862611.0A 2017-08-16 2017-09-22 A kind of waste lubricating oil extraction tower pitch discharge method Pending CN107699332A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2017107022077 2017-08-16
CN201710702207 2017-08-16

Publications (1)

Publication Number Publication Date
CN107699332A true CN107699332A (en) 2018-02-16

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1410510A (en) * 2001-09-26 2003-04-16 石油大学(北京) Solvent extraction technology for removing high softening point asphalt in petroleum slag and its equipment
CN1539936A (en) * 2003-04-26 2004-10-27 荆门石油化工设计院 Technique for regenerating waste lubricating oil
CN103289807A (en) * 2013-05-21 2013-09-11 中国地质大学(武汉) Integrated membrane processing technology for purifying and regenerating spent lubrication oil
WO2014121368A1 (en) * 2013-02-06 2014-08-14 Envirollea Inc. Thermal process to transform contaminated or uncontaminated feed materials into useful oily products, uses of the process, products thereby obtained and uses thereof, manufacturing of the corresponding plant
CN105688441A (en) * 2015-08-30 2016-06-22 张海清 Waste engine oil propane extraction tower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1410510A (en) * 2001-09-26 2003-04-16 石油大学(北京) Solvent extraction technology for removing high softening point asphalt in petroleum slag and its equipment
CN1539936A (en) * 2003-04-26 2004-10-27 荆门石油化工设计院 Technique for regenerating waste lubricating oil
WO2014121368A1 (en) * 2013-02-06 2014-08-14 Envirollea Inc. Thermal process to transform contaminated or uncontaminated feed materials into useful oily products, uses of the process, products thereby obtained and uses thereof, manufacturing of the corresponding plant
CN103289807A (en) * 2013-05-21 2013-09-11 中国地质大学(武汉) Integrated membrane processing technology for purifying and regenerating spent lubrication oil
CN105688441A (en) * 2015-08-30 2016-06-22 张海清 Waste engine oil propane extraction tower

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Application publication date: 20180216

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