CN106075948B - The one full fractionation process of stove three-stage process waste lubricant oil regeneration - Google Patents
The one full fractionation process of stove three-stage process waste lubricant oil regeneration Download PDFInfo
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- CN106075948B CN106075948B CN201610441047.0A CN201610441047A CN106075948B CN 106075948 B CN106075948 B CN 106075948B CN 201610441047 A CN201610441047 A CN 201610441047A CN 106075948 B CN106075948 B CN 106075948B
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- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
- B01D3/146—Multiple effect distillation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0025—Working-up used lubricants to recover useful products ; Cleaning by thermal processes
- C10M175/0033—Working-up used lubricants to recover useful products ; Cleaning by thermal processes using distillation processes; devices therefor
Abstract
The invention discloses a full fractionation process of stove three-stage process waste lubricant oil regeneration, the technique includes the following steps：One section of fractionation：Through one section of fractionating column feed pump through one group of comb at the top of the convection current of heating under reduced pressure stove, the superior effect of a full fractionation process of stove three-stage process waste lubricant oil regeneration of the invention is pretreated raw material：Compared with the prior art, investment is relatively low, simple for process, easy to operate by the present invention, and utilization rate of equipment and installations is high, and heat source utilizes fully, energy-saving and environment-friendly；Product (lube oil base stocks oil) yield higher (being more than 85%), product quality are preferable, and good refined material oil is provided for postorder refining step；The continuous on-stream time of device at least three months further develops to intensive, scale direction for waste lubricant oil regeneration enterprise and provides a practicable disposing technique, and economic benefit and social benefit are notable.
Description
Technical field
The present invention relates to a kind of process for regeneration of waste lubricating oil, are fractionated entirely more particularly to a stove three-stage process waste lubricant oil regeneration
Technique.
Background technology
Domestic waste lubricating oil factory disposal technology mostly is pretreatment, fractionation and process for refining.The expansion for scale of giving up with place,
How place is useless improves yield, improves finished product quality, extends fractionating device on-stream time, energy saving resource and locate useless in the process
It is always to perplex industry and be badly in need of the problem solved not produce the problems such as useless, while also restricts waste lubricating oil and dispose enterprise into one
It walks and develops to intensive, scale direction；It is intermediate other than the pretreatment of preceding road and rear road refine in waste lubricating oil comprehensive utilization
Effective and reasonable fractionation is most important link.By active ingredient in waste lubricating oil efficiently separate out all (or the overwhelming majority),
It is that industry is laid siege to always to increase substantially finished product yield, improve distillate product quality, extend device on-stream time
Target.
Invention content
The purpose of the present invention is for waste lubricating oil fractional distillation process provide it is a kind of more energy efficient, more environmentally friendly, easier, more practical and
The optimize technique of the longer waste lubricant oil regeneration fractionation overall process of more extensive finished product better quality simultaneously, device on-stream time.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：
The one full fractionation process of stove three-stage process waste lubricant oil regeneration, which is characterized in that the technique includes the following steps：
One section of fractionation：Pretreated raw material is through one section of fractionating column feed pump through one group of row at the top of the convection current of heating under reduced pressure stove
Pipe, taken using fume afterheat enter after heat one section of raw material heat exchanger, No. 1, two sections raw material heat exchangers 2 of two sections of raw material heat exchangers,
No. 3, three sections raw material heat exchangers of two sections of raw material heat exchangers enter back into one group of one group of comb and lower part in the middle part of heating under reduced pressure stove convection cell
Comb carries out being dehydrated de- light component subsequently into one section of vacuum fractionation tower, and one section of vacuum ejector of tower top is vacuumized, set in tower
One side line puts with one section of reflux and outside pumped, after being exchanged heat by one section of raw material heat exchanger, after the cooling of one-step cooling device, and one
As overhead reflux, a part obtains putting outside light fuel oil for part；
Two sections of fractionation：One section of fractionating column base oil is directly entered the radiation chamber of heating under reduced pressure stove through one section of bottom of towe pumped, reaches
It is produced after to required temperature into two sections of vacuum fractionation towers progress are low, medium viscosity material is oily, two sections of vacuum ejectors of tower top are taken out true
Sky, sets three side lines in tower, low viscosity material oil by two sections of reflux and it is outer put No. 1 extraction of pump, pass through two sections of raw material heat exchangers 1
After heat exchange, after No. 1 cooling of two-step cooling device, a part obtains low viscosity material oil and sends outside as overhead reflux, a part；
Medium viscosity material oil is extracted out by two sections of reflux and outer pump 2 of putting, after No. 2 heat exchange of two sections of raw material heat exchangers, one
It is allocated as to flow back, a part obtains medium viscosity material oil and send outside after No. 2 coolings of two-step cooling device；Piece side line of lowest part is punching
Section is washed to ensure the quality of top oil, rinsed by two sections and puts pumped outside, a part is directly entered purge zone upper strata and is washed
It washs, a part after No. 3 coolings of two-step cooling device, obtains a small amount of middle and high viscosity material after No. 3 heat exchange of two sections of raw material heat exchangers
It is put outside oily；
Three sections of fractionation：Two sections of fractionating column base oil gravity flows enter two sections of pans, and three are directly entered through two sections of bottom of towe pumpeds
Section thin film evaporator, the public two sections of fractionating system vacuum of thin film evaporation column overhead vacuum obtain high viscosity material after thin-film distillation
Oil is sent outside from three sections of pans 1 are flowed by putting pump outside three sections of distillate oils of high viscosity, and tower bottoms flows into three sections of pans 2 certainly
It number is arranged by three sections of base oil efflux pumps are outer after three sections of raw material heat exchangers of Residual oil/raw material, heat exchange.
After adopting the above technical scheme, the comprehensive characteristics of the present invention are will to be fractionated full mistake according to different light middle heavy constituents
Cheng Youji is divided into three different point processes, and three fractionation point processes can effectively cut different target components, while effectively anti-
The phenomenon that heater outlet temperature height, the easy coking of equipment, product easily crack when being fractionated in a tower is stopped.
The present invention is a kind of continous way group technology, and major advantage is that operating condition is mild, and process is easy, equipment
Compact in design operates flexibility and reliability.One stove of capital equipment, three tower used is all the more common equipment of petrochemical industry, is being met not
It can be manufactured at home under same treating capacity and basic technology requirement.It can be according to the composition and boiling range of waste lubricating oil come control manipulation
Condition, therefore various waste lubricating oils is suitble to be particularly the mixed refinement for mixing waste lubricating oil of various single waste lubricating oils.This
Advantageous effect of the invention with following aspect：
Three sections of fractionation of the invention only used a heating furnace rather than need to usually use two or three, thus greatly letter
The heating equipment configuration of system is changed, investment reduces, simple for process, energy saving, easy to operate.
The vacuum of third section thin film evaporator (tower 3) of the present invention is obtained without individually separately matching vacuum pump set, but is borrowed
The vacuum pump set of second segment (tower 2) thus greatlies simplify the vacuum equipment configuration of system, equally reduces investment, simplify
Technique, has saved the energy, easy operation.
Stove three-stage process of the present invention since each unit all operates at a lower temperature, is flowed entirely according to waste lubricating oil
Journey substep is carried out targetedly target oil and is obtained by the different vacuum degree of different temperature, different device structures or form,
It is thus fractionated in link in rear two sections of high temperature, raw material and product be not oxidizable, is not easy to crack, and also therefore target product lubricates oil base
Plinth oil plant oil yield is high, can be usually reached more than 85%, high-quality (of light color, fraction is narrow, and flash-point is high), for follow-up basic olein
System has prepared good raw material.
Stove three-stage process of the present invention can significantly solve the short general character of on-stream time in waste lubricating oil distillation process and ask
Topic since the operation temperature of second and third section of fractionation is more relatively low than other way of distillations, effectively prevents the feelings of the high easily coking of temperature
Condition occurs, thus under similarity condition, (usually all combining using under the conditions of waste lubricating oil pretreating process) common distillation side
The on-stream time of method is no more than one to one and a half months, and the on-stream time of a stove three-stage process can be at least up to three months or even longer.
In conclusion the present invention is compared with the prior art, relatively low, simple for process, easy to operate, utilization rate of equipment and installations is invested
Height, heat source utilizes fully, energy-saving and environment-friendly；Product (lube oil base stocks oil) yield higher (being more than 85%), product matter
Amount is preferable, and good refined material oil is provided for postorder refining step；The continuous on-stream time of device at least three months, for useless lubrication
Oil regeneration enterprise further develops to intensive, scale direction provides a practicable disposing technique, economic benefit
It is notable with social benefit.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the topology view of a full fractionation process of stove three-stage process waste lubricant oil regeneration of the invention；
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The all other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, a full fractionation process of stove three-stage process waste lubricant oil regeneration includes one section of 1, one section of fractionating column feed pump
2, two sections of raw material heat exchanger, 3, two sections of raw material heat exchanger 1,4, two sections of raw material heat exchanger 2,5, three sections of raw materials of raw material heat exchanger 3
6, one sections of heat exchanger, 7, one sections of vacuum fractionation tower, 8, one sections of vacuum ejector, 9, one sections of column bottoms pump flows back and outer to put 10, one sections of pump cold
But device 11,12, two sections of heating under reduced pressure stove, 13, two sections of vacuum fractionation tower, 14, two sections of vacuum ejector, 15, two sections of pans column bottoms pump
16th, 20, three sections of bottoms of pump are put outside three sections of 17, three sections of thin film evaporator, 18, three sections of pans 1 pans 2,19, three sections of distillate oils
Oily 21, two sections of efflux pump rinses and puts outside 22, two sections of reflux of pump and puts No. 2 23, two sections of reflux of pump outside and put pump No. 1 24, two outside
Section cooler No. 3 25, two-step cooling device No. 2 26 and two-step cooling device No. 1 27.
One section of 2, two sections of raw material heat exchanger, 3, two sections of raw material heat exchanger 1,4, two sections of raw material heat exchanger 3 of raw material heat exchanger 2
Numbers 5 and three sections of raw material heat exchangers 6 be sequentially connected, three sections of raw material heat exchangers 6 are connect with heating under reduced pressure stove 12,
One section of 8, one sections of vacuum ejector, 7, one sections of vacuum fractionation tower column bottoms pump 9 is sequentially connected with heating under reduced pressure stove 12.
One section of 7, one sections of vacuum fractionation tower flows back and puts 10, one sections of raw material heat exchangers 2 of pump outside to be connect with one-step cooling device 11.
Heating under reduced pressure stove 12 is connect with two sections of vacuum fractionation towers 13, two sections of 14, two sections of vacuum ejector, 13, two sections of vacuum fractionation tower centres
15, two sections of tank, 16, three sections of column bottoms pump, 17, three sections of thin film evaporator, 18, three sections of pans 1,19, three sections of distillate oils of pans 2
Outside 20, three sections of base oil efflux pumps 21 of pump are put to connect with three sections of raw material heat exchangers 6.
Two sections of vacuum fractionation towers 13 and two sections rinse and it is outer put 22, two sections of reflux of pump and it is outer put No. 2 23, two sections of reflux of pump and
Outer to put No. 1 24 connection of pump, two sections of reflux and outer pump of putting are connect for No. 24 for No. 2 23 with two sections of raw material heat exchangers,
Two sections of raw material heat exchangers No. 13 No. 1 27 with two-step cooling device are connect；
Two sections of raw material heat exchangers No. 24 No. 2 26 with two-step cooling device are connect；
Two sections of raw material heat exchangers No. 35 No. 3 25 with two-step cooling device are connect；
Below in conjunction with the accompanying drawings and description of the drawings table and the present invention is further described as follows by three sections of fractionation sequence：
One section of fractionation：Pretreated raw material is through one section of fractionating column feed pump 1 through one group at the top of 12 convection current of heating under reduced pressure stove
Comb (upper entering and lower leaving) enters one section of 2, two sections of raw material heat exchanger, 3, two sections of raw material heat exchanger 1 after taking heat using fume afterheat
4, two sections of raw material heat exchangers 3,5, the three sections of raw material heat exchangers 6 of raw material heat exchanger 2, enter back into 12 convection cell of heating under reduced pressure stove
One group of portion comb and one group of lower part comb (upper entering and lower leaving), carry out being dehydrated de- light component, tower subsequently into one section of vacuum fractionation tower 7
The one section of vacuum ejector 8 in top vacuumizes, and a side line is set in tower, is extracted out with one section of reflux and outer pump 10 of putting, passes through one section of raw material
After heat exchanger 2 exchanges heat, after the cooling of one-step cooling device 11, as overhead reflux, a part obtains putting outside light fuel oil a part；
Two sections of fractionation：One section of fractionating column base oil extracts the radiation chamber for being directly entered heating under reduced pressure stove 12 out through one section of column bottoms pump 9,
Enter after vaporization temperature needed for reaching two sections of vacuum fractionation towers 13 carry out it is low, medium viscosity material oil produce, two sections of vacuum of tower top
Injector 14, sets three side lines in tower, low viscosity material oil by two sections of reflux and it is outer put No. 1 24 extraction of pump, pass through two sections of raw materials
After No. 13 heat exchange of heat exchanger, after No. 1 27 cooling of two-step cooling device, a part obtains low viscosity as overhead reflux, a part
Material oil is sent outside；
Medium viscosity material oil is extracted out for No. 2 23 by two sections of reflux and outer pump of putting, after No. 24 heat exchange of two sections of raw material heat exchangers, one
Part obtains medium viscosity material oil and sends outside as reflux, a part after No. 2 26 coolings of two-step cooling device；Piece side line of lowest part
Be purge zone to ensure the quality of top oil, rinsed by two sections and it is outer put 22 extraction of pump, a part is directly entered purge zone upper strata
It is washed, a part is after No. 35 heat exchange of two sections of raw material heat exchangers, after No. 3 25 coolings of two-step cooling device, in obtaining on a small quantity,
High viscosity material oil is outer to be put.
Three sections of fractionation：Two sections of fractionating column base oil gravity flows enter two sections of pans 15, are fractionated through three sections into two sections of column bottoms pumps 16
Extraction is directly entered three sections of thin film evaporators 17, and the public two sections of fractionating system vacuum of thin film evaporation column overhead vacuum are steamed through film
High viscosity material oil is obtained after evaporating from three sections of pans No. 1 18 are flowed into, is sent outside by putting pump 20 outside three sections of distillate oils of high viscosity, bottom of towe is residual
Oil from flow into three sections of pans No. 2 19 by three sections of base oil efflux pumps 21 through three sections of raw material heat exchangers 6 of Residual oil/raw material, heat exchange (if you need to
When wanting) it arranges outside afterwards.
After adopting the above technical scheme, the comprehensive characteristics of the present invention are will to be fractionated full mistake according to different light middle heavy constituents
Cheng Youji is divided into three different point processes, and three fractionation point processes can effectively cut different target components, while effectively anti-
The phenomenon that heater outlet temperature height, the easy coking of equipment, product easily crack when being fractionated in a tower is stopped.
The present invention is a kind of continous way group technology, and major advantage is that operating condition is mild, and process is easy, equipment
Compact in design operates flexibility and reliability.One stove of capital equipment, three tower used is all the more common equipment of petrochemical industry, is being met not
It can be manufactured at home under same treating capacity and basic technology requirement.It can be according to the composition and boiling range of waste lubricating oil come control manipulation
Condition, therefore various waste lubricating oils is suitble to be particularly the mixed refinement for mixing waste lubricating oil of various single waste lubricating oils.This
Advantageous effect of the invention with following aspect：
Three sections of fractionation of the invention only used a heating furnace rather than need to usually use two or three, thus greatly letter
The heating equipment configuration of system is changed, investment reduces, simple for process, energy saving, easy to operate.
The vacuum of third section thin film evaporator (tower 3) of the present invention is obtained without individually separately matching vacuum pump set, but is borrowed
The vacuum pump set of second segment (tower 2) thus greatlies simplify the vacuum equipment configuration of system, equally reduces investment, simplify
Technique, has saved the energy, easy operation.
Stove three-stage process of the present invention since each unit all operates at a lower temperature, is flowed entirely according to waste lubricating oil
Journey substep is carried out targetedly target oil and is obtained by the different vacuum degree of different temperature, different device structures or form,
It is thus fractionated in link in rear two sections of high temperature, raw material and product be not oxidizable, is not easy to crack, and also therefore target product lubricates oil base
Plinth oil plant oil yield is high, can be usually reached more than 85%, high-quality (of light color, fraction is narrow, and flash-point is high), for follow-up basic olein
System has prepared good raw material.
Stove three-stage process of the present invention can significantly solve the short general character of on-stream time in waste lubricating oil distillation process and ask
Topic since the operation temperature of second and third section of fractionation is more relatively low than other way of distillations, effectively prevents the feelings of the high easily coking of temperature
Condition occurs, thus under similarity condition, (usually all combining using under the conditions of waste lubricating oil pretreating process) common distillation side
The on-stream time of method is no more than one to one and a half months, and the on-stream time of a stove three-stage process can be at least up to three months or even longer.
In conclusion the present invention is compared with the prior art, relatively low, simple for process, easy to operate, utilization rate of equipment and installations is invested
Height, heat source utilizes fully, energy-saving and environment-friendly；Product (lube oil base stocks oil) yield higher (being more than 85%), product matter
Amount is preferable, and good refined material oil is provided for postorder refining step；The continuous on-stream time of device at least three months, for useless lubrication
Oil regeneration enterprise further develops to intensive, scale direction provides a practicable disposing technique, economic benefit
It is notable with social benefit.
Finally it should be noted that：Above example only illustrates technical scheme of the present invention, rather than its limitations；Although reference
The present invention is described in detail in previous embodiment, it will be understood by those of ordinary skill in the art that：It still can be right
Technical solution recorded in foregoing embodiments modifies or carries out equivalent replacement to which part technical characteristic；And this
A little modifications are replaced, the spirit and model of various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (1)
- A 1. full fractionation process of stove three-stage process waste lubricant oil regeneration, which is characterized in that the technique includes the following steps：One section of fractionation：Pretreated raw material is vented through one section of fractionating column feed pump through the convection current of heating under reduced pressure stove, more than flue gas Heat enters one section of raw material heat exchanger, two sections of No. 1, two sections of raw material heat exchanger No. 2, two sections of raw material heat exchanger raw material heat exchangers after taking heat No. 3, three sections of raw material heat exchangers enter back into one group of comb and one group of lower part comb in the middle part of heating under reduced pressure stove convection cell, subsequently into One section of vacuum fractionation tower carries out being dehydrated de- light component, and one section of vacuum ejector of tower top vacuumizes, and a side line is set in tower, with one section It flows back and puts pumped outside, after being exchanged heat by one section of raw material heat exchanger, after the cooling of one-step cooling device, a part is returned as tower top Stream, a part obtain putting outside light fuel oil；Two sections of fractionation：One section of fractionating column base oil is directly entered the radiation chamber of heating under reduced pressure stove through one section of bottom of towe pumped, reaches institute It is produced after needing temperature into two sections of vacuum fractionation towers progress are low, medium viscosity material is oily, two sections of vacuum ejectors of tower top vacuumize, tower Three side lines of middle setting, low viscosity material oil are extracted out by two sections of reflux and outer pump 1 of putting, and pass through No. 1 heat exchange of two sections of raw material heat exchangers Afterwards, after No. 1 cooling of two-step cooling device, a part obtains low viscosity material oil and sends outside as overhead reflux, a part；Medium viscosity material oil is extracted out by two sections of reflux and outer pump 2 of putting, and after No. 2 heat exchange of two sections of raw material heat exchangers, a part is made For reflux, a part obtains medium viscosity material oil and sends outside after No. 2 coolings of two-step cooling device；Piece side line of lowest part is purge zone To ensure the quality of top oil, to be rinsed by two sections and put pumped outside, a part is directly entered purge zone upper strata and is washed, and one Part is after No. 3 heat exchange of two sections of raw material heat exchangers, and after No. 3 coolings of two-step cooling device, it is outer to obtain a small amount of middle and high viscosity material oil It puts；Three sections of fractionation：Two sections of fractionating column base oil gravity flows enter two sections of pans, are directly entered through two sections of bottom of towe pumpeds three sections thin Film evaporator, the public two sections of fractionating system vacuum of thin film evaporation column overhead vacuum obtain high viscosity material oil certainly after thin-film distillation Flow into three sections of pans 1, sent outside by putting pump outside three sections of distillate oils of high viscosity, tower bottoms from flow into three sections of pans 2 by Three sections of base oil efflux pumps are outer after three sections of raw material heat exchangers of Residual oil/raw material, heat exchange to be arranged.
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| CN110923052B (en) * | 2019-12-06 | 2022-04-12 | 烟台立衡环保科技有限公司 | Distillation recovery device for waste lubricating oil regeneration |
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| EP1260266A1 (en) * | 2000-02-14 | 2002-11-27 | Nikolai Ivanovich Selivanov | Method and device for resonance excitation of fluids and method and device for fractionating hydrocarbon liquids |
| CN101319166A (en) * | 2007-10-19 | 2008-12-10 | 尹英遂 | Application of distillation and multi-stage molecular distillation technique in regeneration process for waste lubricant oil |
| CN102443420A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep vacuum distillation process and system |
| CN102443407A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep drawing process method |
| CN203559020U (en) * | 2013-11-25 | 2014-04-23 | 辽宁中旭石油化工有限公司 | Device for producing naphtha, diesel oil and lubricant base oil from spent lubrication oil |
| CN104099171A (en) * | 2014-08-01 | 2014-10-15 | 四川省中明环境治理有限公司 | Continuous distillation technology used for regeneration of spent lubrication oil |
| CN105505550A (en) * | 2015-12-09 | 2016-04-20 | 台州天天环保科技有限公司 | Method for carrying out regeneration treatment on useless lubricating oil |
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2016
- 2016-06-20 CN CN201610441047.0A patent/CN106075948B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1260266A1 (en) * | 2000-02-14 | 2002-11-27 | Nikolai Ivanovich Selivanov | Method and device for resonance excitation of fluids and method and device for fractionating hydrocarbon liquids |
| CN101319166A (en) * | 2007-10-19 | 2008-12-10 | 尹英遂 | Application of distillation and multi-stage molecular distillation technique in regeneration process for waste lubricant oil |
| CN102443420A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep vacuum distillation process and system |
| CN102443407A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep drawing process method |
| CN203559020U (en) * | 2013-11-25 | 2014-04-23 | 辽宁中旭石油化工有限公司 | Device for producing naphtha, diesel oil and lubricant base oil from spent lubrication oil |
| CN104099171A (en) * | 2014-08-01 | 2014-10-15 | 四川省中明环境治理有限公司 | Continuous distillation technology used for regeneration of spent lubrication oil |
| CN105505550A (en) * | 2015-12-09 | 2016-04-20 | 台州天天环保科技有限公司 | Method for carrying out regeneration treatment on useless lubricating oil |
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