CN110527549A - A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method - Google Patents
A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method Download PDFInfo
- Publication number
- CN110527549A CN110527549A CN201810518139.3A CN201810518139A CN110527549A CN 110527549 A CN110527549 A CN 110527549A CN 201810518139 A CN201810518139 A CN 201810518139A CN 110527549 A CN110527549 A CN 110527549A
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- CN
- China
- Prior art keywords
- propane
- pitch
- discharged
- reducing pressure
- water
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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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/38—Steam distillation
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/003—Solvent de-asphalting
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/006—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents of waste oils, e.g. PCB's containing oils
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/28—Recovery of used solvent
-
- 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
- C10G2300/1007—Used oils
Abstract
A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method, steps are as follows: (1) propane-asphalt mixture is discharged from waste lubricating oil extraction tower bottom, one water is injected on propane-asphalt mixture pipeline at the same time, is formed by propane-pitch-aqueous mixtures in this way using being discharged after control valve reducing pressure by regulating flow；The effect of this strand of injection water is first is that constantly rinse internally piloted valve, second is that balancing propane-pitch-aqueous mixtures propane after control valve reducing pressure by regulating flow vaporizes generated cooling capacity；(2) propane-pitch-aqueous mixtures that (1) are step is discharged after internally piloted valve reducing pressure by regulating flow discharged on one flowing hot water pipeline, and the pipeline between control valve and hot water pipeline is short straight as far as possible as far as possible；Flow-rate ratio propane-pitch-aqueous mixtures flow of hot water is much larger, it is therefore an objective to so that pitch is dispersed in water and facilitate conveying；Step (2) after flowing hot water, carry pitch, propane and enter stripper after heater heats up, after stripping, propane and vapor are discharged from stripper top, and pitch and water without propane are discharged from the bottom of stripper.
Description
Technical field
The present invention relates to a kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method, this method belong to petrochemical industry and
Environmental protection technical field.
Background technique
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 generate the harmful substances such as a large amount of dioxin, sulphur phosphorus organic compound.Only have about 10% component rotten in waste lubricating oil,
Remaining major part hydro carbons composition is still that the main viscosity composition of lubricating oil can regenerate after removing rotten object and impurity and meet matter
Desired lube base oil is measured, and regeneration rate can reach 70% or more.2012, China's lubricating oil real consumption amount was up to 8,500,000
Ton is 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 period eighties in century, since waste lubricant oil regeneration industry starts fast development, especially 2000 year, waste lubricant oil regeneration enterprise
Scale has very big promotion, still, however it remains manufacturing process is simple, secondary pollution is serious, base oil yield is lower, product quality
The problems such as poor.It " is instructed about " 12th Five-Year Plan " comprehensive utilization of resources is printed and distributed in consideration of it, the National Development and Reform Commission has issued
The notice of opinion and large solid waste comprehensive utilization embodiment ", the recycling of notification waste lubricating oil and resource utilization
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 recycling as raw material
The industrial oils exempt from consumption tax such as lube base oil, gasoline, diesel oil of production.Country supports useless profit by preferential tax policy
Lubricating oil regenerates enterprise development, can not only alleviate the pressure of China's oil resource scarcity, but also regular distributors can be helped to spend
Hard time promotes the sector industrialized development, improves the technical level of the sector, reduces 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, by additive, colloid, asphalitine, the solid impurity etc. in extraction removing waste lubricating oil, removing this
A little substances are a kind of mixtures of complicated component, are generally termed pitch in industry.This pitch has very with traditional asphalt
Big difference, especially sticky and softening point are up to 200 DEG C or more, are very easy to blocking extraction tower lower part and its discharge is passed through
Pipeline and equipment.Especially: the 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 is de-
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, with annual amount for the treatment of for 100,000 tons of waste lubricating oils
Extraction tower for, pitch yield about 625kg/h(0.7m3/ h), yield small in this way is difficult to realize stable boundary position control
With continuous discharge, if bottom of the pitch in extraction tower is allowed to save bit by bit to form continuous phase and maintain certain boundary position and be then exhausted from,
Pitch will coalesce due to the residence time is longer in tower bottom, it is easy to cause tower bottom to block, even if can be discharged, because of flow rate of asphalt
Too small, its softening point is again high, be easy to block in the case where having heat preservation and heat tracing subsequent control valve, heat exchanger and
Pipeline；If control pitch is in lower boundary position and is continuously discharged, 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, will cause topical hypothermia, add this drip
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, the asphalt cement phase isolated due to propane vaporization can block heat exchanger and on the way regularly
Pipeline.Existing waste lubricating oil extraction tower pitch discharge technique, usually pitch (containing more propane) from extraction tower bottom
After discharge, control valve reducing pressure by regulating flow is first passed around, is heated using heat exchanger, then enters pitch evaporating column and asphaltene stripper,
The case where necessarily will appear above-mentioned pitch blocking pipeline, heat exchanger, valve or even tower, all brings to safety in production and continuous production
Very big threat and difficulty.
Goal of the invention
The purpose of the present invention is: it solves waste lubricating oil extraction tower bottom pitch and problem is discharged.
Summary of the invention
The technology of the present invention method, steps are as follows:
(1) propane-asphalt mixture is from waste lubricating oil extraction tower bottom discharge, at the same time on propane-asphalt mixture pipeline
One water is injected, is formed by propane-pitch-aqueous mixtures in this way using being discharged after control valve reducing pressure by regulating flow；The injection of this stock
The effect of water is first is that constantly rinse internally piloted valve, second is that balancing propane-pitch-aqueous mixtures after control valve reducing pressure by regulating flow
Propane vaporizes generated cooling capacity；
(2) propane-pitch-aqueous mixtures that (1) are step is discharged after internally piloted valve reducing pressure by regulating flow discharged into one flowing hot water pipe
On road, the pipeline between control valve and hot water pipeline is short straight as far as possible as far as possible；Flow-rate ratio propane-pitch-aqueous mixtures of hot water
Flow is much larger, it is therefore an objective to so that pitch is dispersed in water and facilitate conveying；
Step (2) after flowing hot water, carry pitch, propane after heater heats up enter stripper, by stripping
Afterwards, propane and vapor are discharged from stripper top, and pitch and water without propane are discharged from the bottom of stripper.
Advantages of the present invention:
First, propane-asphalt mixture is from waste lubricating oil extraction tower bottom discharge, at the same time in propane-asphalt mixture pipe
One water is injected on road, is formed by propane-pitch-aqueous mixtures in this way using being discharged after control valve reducing pressure by regulating flow；This stock
The effect of water is first is that constantly rinse internally piloted valve, second is that balancing propane-pitch-aqueous mixtures after control valve reducing pressure by regulating flow
Propane vaporizes generated cooling capacity；
Second, the propane-pitch-aqueous mixtures being discharged after internally piloted valve reducing pressure by regulating flow are discharged into one flowing hot water pipeline
On, flow-rate ratio propane-pitch-aqueous mixtures flow of hot water is much larger, so that pitch is dispersed in water and facilitates conveying；
Third can arrive the pitch circle position control for extracting tower bottom low as far as possible, it might even be possible to accomplish apparent pitch do not occur
Solids accumulation phase avoids pitch blocking extraction tower bottom；
4th, existing waste lubricating oil extraction tower bottom pitch discharge method is the mobility for guaranteeing pitch, it will usually into pitch
It is blended into the easy flowing oil product of equivalent, the oil product being blended into usually just comes from waste lubricating oil, and the pitch after being blended into oil product is unable to satisfy drip
Green quality index, product sales difficulty, and significant the yield for reducing reclaimed oil.This method is not needed into pitch
It is blended into any oil product, the yield of reclaimed oil can achieve highest；
5th, existing method asphaltic products are easy to solidify in storage and transportational process, and this method asphaltic products are normal
Warm solid-state can be sold convenient for storage and transport as the additive of different kinds of roads pitch.
Detailed description of the invention
Fig. 1 is method schematic diagram of the invention.
In figure: A be extraction tower, B be control valve, C be heater, D be stripper, 1 be propane-asphalt mixture,
2 be inject water, 3 be propane-pitch-aqueous mixtures, 4 be propane-pitch-aqueous mixtures after reducing pressure by regulating flow, 5 be flowing
Hot water, 6 be carry propane, the hot water of pitch, 7 be it is heated carry propane, the hot water of pitch, 8 be propane
The pitch and water of propane are free from vapor, 9.
Specific embodiment
Propane-asphalt mixture 1 is discharged from the bottom of extraction tower A, injection water 2 and propane-asphalt mixture 1
Mixing, the propane-pitch-aqueous mixtures 3 formed after mixing pass through internally piloted valve B reducing pressure by regulating flow, the propane-after reducing pressure by regulating flow
Pitch-aqueous mixtures 4 are mixed with flowing hot water 5, carry propane, the hot water 6 of pitch is added by heater C
Heat, the heated hot water 7 that carry propane, pitch is into stripper D, and after stripping separation, propane and water steam
Gas 8 is discharged from the top of stripper D, and pitch and water 9 without propane are discharged from the bottom of extraction tower D.
Embodiment one:
Propane-asphalt mixture 1 (temperature be 40 DEG C, pressure 4.2MPaG, flow 1.1t/h) is from the bottom of extraction tower A
Portion's discharge；It is mixed with propane-asphalt mixture 1 to inject water 2 (temperature be 90 DEG C, pressure 4.2MPaG, flow 1.1t/h)
It closes, the propane-pitch-aqueous mixtures 3 (temperature is 70 DEG C) formed after mixing pass through internally piloted valve B reducing pressure by regulating flow, throttling drop
Propane-pitch-aqueous mixtures 4 (temperature be 43 DEG C, pressure 0.1MPaG, flow 2.2t/h) and the heat of flowing after pressure
Water 5 (temperature be 90 DEG C, pressure 0.1MPaG, flow 20t/h) mixing, carries the 6 (temperature of hot water of propane, pitch
It is 84 DEG C) it is heated by heater C, the heated hot water 7 (temperature is 100 DEG C) that carry propane, pitch, into
Enter stripper D, after stripping separation, propane and vapor 8 are discharged from the top of stripper D, the drip without propane
Green and water 9 is discharged from the bottom of extraction tower D.
Claims (3)
1. a kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method, it is characterised in that:
Step is (1): propane-asphalt mixture is from waste lubricating oil extraction tower bottom discharge, at the same time in propane-asphalt mixture
One water is injected on pipeline, is formed by propane-pitch-aqueous mixtures in this way using being discharged after control valve reducing pressure by regulating flow；This
The effect of stock injection water is first is that constantly rinsing internally piloted valve, throttling second is that balancing propane-pitch-aqueous mixtures by control valve
Propane vaporizes generated cooling capacity after decompression.
2. a kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method described according to claim 1, in feature
Be: step (2): (1) propane-pitch-aqueous mixtures that step is discharged after internally piloted valve reducing pressure by regulating flow be discharged into one flowing
On hot water pipeline, the pipeline between control valve and hot water pipeline is short straight as far as possible as far as possible；Flow-rate ratio propane-pitch-water of hot water is mixed
The flow for closing object is much larger, it is therefore an objective to so that pitch is dispersed in water and facilitate conveying.
3. a kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method described according to claim 1, in feature
Be: step (3): step (2) after flowing hot water, carry pitch, propane after heater heats up enter stripper, warp
After crossing stripping, propane and vapor are discharged from stripper top, and pitch and water without propane are discharged from the bottom of stripper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518139.3A CN110527549A (en) | 2018-05-27 | 2018-05-27 | A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518139.3A CN110527549A (en) | 2018-05-27 | 2018-05-27 | A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method |
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|---|---|
| CN110527549A true CN110527549A (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810518139.3A Pending CN110527549A (en) | 2018-05-27 | 2018-05-27 | A kind of waste lubricating oil extraction tower pitch reducing pressure by regulating flow discharge method |
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Citations (4)
| 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 |
| CN104449820A (en) * | 2013-09-13 | 2015-03-25 | 中国石油化工股份有限公司 | System for reducing ethylene unit quenching oil viscosity and method for improving solvent recovery rate |
| CN205528605U (en) * | 2016-02-25 | 2016-08-31 | 中国石油化工股份有限公司 | Propane deasphalting test device's pitch discharging device |
| CN107699332A (en) * | 2017-08-16 | 2018-02-16 | 张家彬 | A kind of waste lubricating oil extraction tower pitch discharge method |
-
2018
- 2018-05-27 CN CN201810518139.3A patent/CN110527549A/en active Pending
Patent Citations (4)
| 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 |
| CN104449820A (en) * | 2013-09-13 | 2015-03-25 | 中国石油化工股份有限公司 | System for reducing ethylene unit quenching oil viscosity and method for improving solvent recovery rate |
| CN205528605U (en) * | 2016-02-25 | 2016-08-31 | 中国石油化工股份有限公司 | Propane deasphalting test device's pitch discharging device |
| CN107699332A (en) * | 2017-08-16 | 2018-02-16 | 张家彬 | A kind of waste lubricating oil extraction tower pitch discharge method |
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Application publication date: 20191203 |