CN109749840A - The technique of energy-saving type waste mineral oil refining Reclaimed Base Oil and diesel oil - Google Patents
The technique of energy-saving type waste mineral oil refining Reclaimed Base Oil and diesel oil Download PDFInfo
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Abstract
A kind of technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil; on the one hand it is exchanged heat by many places and recycles the heat of refining cooling condensation; another party is by providing distillation and the condensed environment of negative pressure; enable oil product in boiling point and condensation point the practice gasification and liquefaction of lower temperature; it can reduce basic power source demand required for heating; the two combines can be significantly energy saving; negative pressure device returns the function of providing and do not shut down slagging-off; it can be realized the production process of serialization, improve production efficiency.
Description
Technical field
The present invention relates to the regenerative use technology fields of the mineral oil of waste and old recycling, more particularly to a kind of energy-saving type abandoned mine
The technique of object oil refining Reclaimed Base Oil and diesel oil.
Background technique
The waste mineral oil that China's machine-building at present and traffic transport industry generate every year is reached up to ten thousand tons of 3000-3500.
In face of so huge waste mineral oil, the current recovery utilization rate in China is but very low, only 20%-30 or so.Most of mineral waste
Oil is outwelled usually as waste material, there are many oils in waste mineral oil, is then resulted in waste of resources as waste disposal and environmental pollution；
Waste mineral oil also can be used as fuel use, but containing there are many miscellaneous oil, water, dust and iron filings etc. in waste mineral oil, so mineral waste
The heat that oil firing generates is few, and can generate a large amount of dense smokes, pollutes environment, is detrimental to health.It is raw recently as the people
The flat promotion of running water, energy needs is more more and more intense, and waste mineral oil is by recycling again and refines into burning oil, more and more
Appearance, thus solve the pollution problem of part to a certain extent, the heating method in existing refining equipment compares
The problem of between simple, can not achieve and the energy made full use of, causing refining higher cost.On the other hand due to above-mentioned impurity
Presence, the residual oil formed after refining refining tank in save bit by bit to a certain extent with regard to needing to carry out shutdown cleaning, also influence production
Efficiency.
Summary of the invention
To solve the above problems, the present invention proposes the work of a kind of refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil
Skill.
The technical scheme is that a kind of technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil, the work
Skill refines the outfit of Reclaimed Base Oil and diesel oil using negative pressure energy-saving formula waste mineral oil to realize, which includes electricity
Magnetic induction heating tank, base oil condensing heat exchanger, base oil collect heat exchanger, the first negative pressure diesel oil condensing heat exchanger, second negative
Press diesel oil condensing heat exchanger, waste mineral oil supply column, residual oil collection vessel, negative pressure pump；
The base oil condensing heat exchanger, base oil collect heat exchanger, the first negative pressure diesel oil condensing heat exchanger, the second negative pressure bavin
Oily condensing heat exchanger is the identical pipe heat exchanger of structure, which includes not being connected to but being exchanged heat by heat pipe
Cold medium channel and hot media channel,
It is equipped with the spiral coil for being close to its outer wall in the outside that base oil collects heat exchanger, is covered with heat preservation outside the spiral coil
Material, waste mineral oil supply column lower part are connected to the import of spiral coil by pipeline, the outlet of the spiral coil to
The import in the cold medium channel of one negative pressure diesel oil condensing heat exchanger,
The outlet in the cold medium channel of the first negative pressure diesel oil condensing heat exchanger is connected to the cold of base oil condensing heat exchanger by pipeline
The import of medium channel,
The outlet in the cold medium channel of base oil condensing heat exchanger is connected to electromagnetic induction heating tank oil inlet, electromagnetism by pipeline
The oil inlet of induction heating tank is located at the top of its tank body, is equipped with slag-drip opening, the slag-drip opening in the lower part of electromagnetic induction heating tank
The bottom of residual oil collection vessel is connected to by pipeline；Gaseous state oil outlet is equipped in the top of electromagnetic induction heating tank；
It is successively arranged upper interface, middle interface, lower interface from top to bottom on the hot media channel of base oil condensing heat exchanger, it is described
The gaseous state oil outlet of electromagnetic induction heating tank be connected to by pipeline on the hot media channel of base oil condensing heat exchanger
Middle interface,
Lower interface on the hot media channel of base oil condensing heat exchanger is connected to the heat that base oil collects heat exchanger by pipeline
Medium channel, the inlet end that base oil collects heat exchanger cold medium channel are connected to water source, and base oil collects cold Jie of heat exchanger
The outlet in matter channel to warm water collects drainpipe,
Upper interface on the hot media channel of base oil condensing heat exchanger is connected to the first negative pressure diesel oil condensing heat-exchange by pipeline
The thermal medium inlet of device, it is negative by pipeline connection second that the top of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel steam outlet
The thermal medium inlet on diesel oil condensing heat exchanger top is pressed, the lower part of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel oil outlet and passes through
Pipeline is connected to diesel oil collection vessel,
The thermal medium outlet of second negative pressure diesel oil condensing heat exchanger bottom is connected to diesel oil collection vessel, the second negative pressure by pipeline
The cold medium import of diesel oil condensing heat exchanger connects water source, the cold medium outlet of the second negative pressure diesel oil condensing heat exchanger to temperature
Water collects drainpipe, is connected to negative pressure dress by negative tube at the top of the hot media channel of the second negative pressure diesel oil condensing heat exchanger
It sets, which also passes through the top that pipeline is connected to residual oil collection vessel；
The bottom that the base oil collects the hot media channel of heat exchanger is equipped with oil exit pipe, and the oil exit pipe is for connecting base oil
Container；The negative pressure device includes two concatenated negative pressure pumps；The electromagnetic induction heating tank is steel can, in tank
Electromagnetic induction coil is wound with outside body, which is connected to electromagnetic induction heating power supply；On each pipeline
Equipped with the electromagnetic valve controlled for on-off.
The technique includes the following steps:
A. waste mineral oil is preheating to 40-60 DEG C
Waste mineral oil first enters the outer wall of base oil collection heat exchanger by pipeline after outflow out of waste mineral oil supply column
Spiral coil is preheated, by the base oil collect heat exchanger internal gathering to base oil waste mineral oil is heated to 40-60
℃；
B. waste mineral oil is preheating to 100 DEG C
Waste mineral oil after preheating in step a enters the cold medium channel of the first negative pressure diesel oil condensing heat exchanger by pipeline,
Heat exchange is carried out with gaseous diesel, is preheating to 100 DEG C；
C. waste mineral oil is preheating to 180-200 DEG C
Waste mineral oil after preheating in step b enters the cold medium channel of base oil condensing heat exchanger by pipeline, with gaseous state
The mixture progress heat exchange of diesel oil, gaseous state base oil, is preheating to 180-200 DEG C；
D. waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil
Waste mineral oil after preheating in step c is entered inside electromagnetic induction heating tank by pipeline, is heated to 300-350 DEG C,
Waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil；
E. base oil condensation is collected
The mixture of gaseous diesel, gaseous state base oil in step d enters base oil from electromagnetic induction heating tank by pipeline
Heat exchange, which is carried out, with the waste mineral oil generated in step b in condensing heat exchanger is cooled to 180-200 DEG C, gaseous diesel, gaseous-based
Base oil in the mixture of plinth oil is condensed into liquid base oil, is flowed into the thermal medium that base oil collects heat exchanger by pipeline
The cold water passed through in heat exchanger is collected in channel with base oil again and the expense mineral oil from waste mineral oil charging-tank carries out simultaneously
Heat exchange is cooled to 40-60 DEG C；
F.100 a DEG C high temperature negative pressure diesel oil condensation is collected
Gaseous diesel in step e by pipeline from plinth oil condensing heat exchanger enter in the first negative pressure diesel oil condensing heat exchanger with
40-60 DEG C of the waste mineral oil preheated in step a carries out heat exchange and is cooled to 100 DEG C, is condensed into liquid diesel, forms liquid
Diesel oil exits into diesel oil collection vessel from the hot media channel lower pipeline of the first negative pressure diesel oil condensing heat exchanger；
G.30 a DEG C low-temperature negative-pressure diesel oil condensation is collected
The non-liquefied gaseous diesel of total condensation enters the second negative pressure bavin from the first negative pressure diesel oil condensing heat exchanger in step f
Heat exchange is carried out with cold water in oily condensing heat exchanger, 30 DEG C is cooled to, is condensed into liquid diesel, forms the diesel oil of liquid from second
The hot media channel lower pipeline of negative pressure diesel oil condensing heat exchanger exits into diesel oil collection vessel；
H. negative pressure deslagging
After accumulating residual oil in electromagnetic induction heating tank, negative pressure device connects residual oil collection vessel, is made by the adjustment of electromagnetic valve
Pressure in residual oil collection vessel is lower than the pressure of electromagnetic induction heating tank, the slag that bottom is accumulated in such electromagnetic induction heating tank
Oil is just entered inside residual oil collection vessel by pipeline, closes electromagnetic induction heating tank and residual oil collection vessel after residual oil discharge
Between valve.
Preferably, the cold medium import of the first negative pressure diesel oil condensing heat exchanger is equipped with solid impurity filter,
Solid impurity filtration step is additionally provided between step a and b.
Preferably, the thermal medium of the first negative pressure diesel oil condensing heat exchanger and the first negative pressure diesel oil condensing heat exchanger goes out
Mouth connects oil water separator after converging, and is additionally provided with water-oil separating step after step f and g.
Preferably, the pipeline being connected between waste mineral oil supply column lower part and the import of spiral coil is sleeved on warm water remittance
The external of integrate draining pipe forms interlayer pipe type heat transfer structure, is additionally provided with before step a and waste mineral oil is preheating to 30 DEG C of step
Suddenly, the warm water that waste mineral oil passes through after getting off from supply column in interlayer pipe heat exchange structure and warm water manifold trunk carries out heat exchange, in advance
Heat is to 30 DEG C.
Technical effect of the invention
The energy-saving type waste mineral oil refines the technique of Reclaimed Base Oil and diesel oil, is on the one hand exchanged heat by many places and recycles refining cooling
The heat of condensation, another party enable oil product in the boiling point of lower temperature and cold by providing distillation and the condensed environment of negative pressure
Condensation point practice gasification and liquefaction, can reduce basic power source demand required for heating, and the two is combined and can significantly be saved
The energy, negative pressure device return the function of providing and do not shut down slagging-off, can be realized the production process of serialization, improve production
Efficiency.
Detailed description of the invention
Fig. 1 is the process flow chart for the technique that energy-saving type waste mineral oil refines Reclaimed Base Oil and diesel oil；
Fig. 2 is the system schematic for the outfit that negative pressure energy-saving type waste mineral oil refines Reclaimed Base Oil and diesel oil；
Fig. 3 is the basic block diagram of the pipe heat exchanger in Fig. 2；
1. electromagnetic induction heating tanks, 2. base oils collect heat exchanger, 3. first negative pressure diesel oil condensing heat exchangers, 4. second in figure
Negative pressure diesel oil condensing heat exchanger, 5. base oil condensing heat exchangers, 6. waste mineral oil supply columns, 7. solid impurity filters, 8. oil
Separator, 9. vacuum pumps, 10. residual oil collection vessels, 11. warm water collect drainpipe, 12. interlayer pipe type heat transfer structures.
201. cold or hot media channel, 202. heat or cold medium channels.
Specific embodiment
Embodiment one: referring to Fig. 1-3, a kind of technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil in figure,
The technique using negative pressure energy-saving formula waste mineral oil refines the outfit of Reclaimed Base Oil and diesel oil to realize, the outfit packet
It includes electromagnetic induction heating tank, base oil condensing heat exchanger, base oil and collects heat exchanger, the first negative pressure diesel oil condensing heat exchanger, the
Two negative pressure diesel oil condensing heat exchangers, waste mineral oil supply column, residual oil collection vessel, negative pressure pump；
The base oil condensing heat exchanger, base oil collect heat exchanger, the first negative pressure diesel oil condensing heat exchanger, the second negative pressure bavin
Oily condensing heat exchanger is the identical pipe heat exchanger of structure, which includes not being connected to but being exchanged heat by heat pipe
Cold medium channel and hot media channel,
It is equipped with the spiral coil for being close to its outer wall in the outside that base oil collects heat exchanger, is covered with heat preservation outside the spiral coil
Material, waste mineral oil supply column lower part are connected to the import of spiral coil by pipeline, the outlet of the spiral coil to
The import in the cold medium channel of one negative pressure diesel oil condensing heat exchanger,
The outlet in the cold medium channel of the first negative pressure diesel oil condensing heat exchanger is connected to the cold of base oil condensing heat exchanger by pipeline
The import of medium channel,
The outlet in the cold medium channel of base oil condensing heat exchanger is connected to electromagnetic induction heating tank oil inlet, electromagnetism by pipeline
The oil inlet of induction heating tank is located at the top of its tank body, is equipped with slag-drip opening, the slag-drip opening in the lower part of electromagnetic induction heating tank
The bottom of residual oil collection vessel is connected to by pipeline；Gaseous state oil outlet is equipped in the top of electromagnetic induction heating tank；
It is successively arranged upper interface, middle interface, lower interface from top to bottom on the hot media channel of base oil condensing heat exchanger, it is described
The gaseous state oil outlet of electromagnetic induction heating tank be connected to by pipeline on the hot media channel of base oil condensing heat exchanger
Middle interface,
Lower interface on the hot media channel of base oil condensing heat exchanger is connected to the heat that base oil collects heat exchanger by pipeline
Medium channel, the inlet end that base oil collects heat exchanger cold medium channel are connected to water source, and base oil collects cold Jie of heat exchanger
The outlet in matter channel to warm water collects drainpipe,
Upper interface on the hot media channel of base oil condensing heat exchanger is connected to the first negative pressure diesel oil condensing heat-exchange by pipeline
The thermal medium inlet of device, it is negative by pipeline connection second that the top of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel steam outlet
The thermal medium inlet on diesel oil condensing heat exchanger top is pressed, the lower part of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel oil outlet and passes through
Pipeline is connected to diesel oil collection vessel,
The thermal medium outlet of second negative pressure diesel oil condensing heat exchanger bottom is connected to diesel oil collection vessel, the second negative pressure by pipeline
The cold medium import of diesel oil condensing heat exchanger connects water source, the cold medium outlet of the second negative pressure diesel oil condensing heat exchanger to temperature
Water collects drainpipe, is connected to negative pressure dress by negative tube at the top of the hot media channel of the second negative pressure diesel oil condensing heat exchanger
It sets, which also passes through the top that pipeline is connected to residual oil collection vessel；
The bottom that the base oil collects the hot media channel of heat exchanger is equipped with oil exit pipe, and the oil exit pipe is for connecting base oil
Container；The negative pressure device includes two concatenated negative pressure pumps, in the normally refining course of work, provides 0.098 megapascal
Negative pressure；The electromagnetic induction heating tank is steel can, has been externally wrapped with electromagnetic induction coil in tank body, the electromagnetism sense
Coil is answered to be connected to electromagnetic induction heating power supply；The electromagnetic valve for on-off control is equipped on each pipeline.
The technique includes the following steps:
A. waste mineral oil is preheating to 40-60 DEG C
Waste mineral oil first enters the outer wall of base oil collection heat exchanger by pipeline after outflow out of waste mineral oil supply column
Spiral coil is preheated, by the base oil collect heat exchanger internal gathering to base oil waste mineral oil is heated to 40-60
℃；
B. waste mineral oil is preheating to 100 DEG C
Waste mineral oil after preheating in step a enters the cold medium channel of the first negative pressure diesel oil condensing heat exchanger by pipeline,
Heat exchange is carried out with gaseous diesel, is preheating to 100 DEG C；
C. waste mineral oil is preheating to 180-200 DEG C
Waste mineral oil after preheating in step b enters the cold medium channel of base oil condensing heat exchanger by pipeline, with gaseous state
The mixture progress heat exchange of diesel oil, gaseous state base oil, is preheating to 180-200 DEG C；
D. waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil
Waste mineral oil after preheating in step c is entered inside electromagnetic induction heating tank by pipeline, is heated to 300-350 DEG C,
Waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil；
E. base oil condensation is collected
The mixture of gaseous diesel, gaseous state base oil in step d enters base oil from electromagnetic induction heating tank by pipeline
Heat exchange, which is carried out, with the waste mineral oil generated in step b in condensing heat exchanger is cooled to 180-200 DEG C, gaseous diesel, gaseous-based
Base oil in the mixture of plinth oil is condensed into liquid base oil, is flowed into the thermal medium that base oil collects heat exchanger by pipeline
The cold water passed through in heat exchanger is collected in channel with base oil again and the expense mineral oil from waste mineral oil charging-tank carries out simultaneously
Heat exchange is cooled to 40-60 DEG C；
F.100 a DEG C high temperature negative pressure diesel oil condensation is collected
Gaseous diesel in step e by pipeline from plinth oil condensing heat exchanger enter in the first negative pressure diesel oil condensing heat exchanger with
40-60 DEG C of the waste mineral oil preheated in step a carries out heat exchange and is cooled to 100 DEG C, is condensed into liquid diesel, forms liquid
Diesel oil exits into diesel oil collection vessel from the hot media channel lower pipeline of the first negative pressure diesel oil condensing heat exchanger；
G.30 a DEG C low-temperature negative-pressure diesel oil condensation is collected
The non-liquefied gaseous diesel of total condensation enters the second negative pressure bavin from the first negative pressure diesel oil condensing heat exchanger in step f
Heat exchange is carried out with cold water in oily condensing heat exchanger, 30 DEG C is cooled to, is condensed into liquid diesel, forms the diesel oil of liquid from second
The hot media channel lower pipeline of negative pressure diesel oil condensing heat exchanger exits into diesel oil collection vessel；
H. negative pressure deslagging
After accumulating residual oil in electromagnetic induction heating tank, negative pressure device connects residual oil collection vessel, is made by the adjustment of electromagnetic valve
Pressure in residual oil collection vessel is lower than the pressure of electromagnetic induction heating tank, the slag that bottom is accumulated in such electromagnetic induction heating tank
Oil is just entered inside residual oil collection vessel by pipeline, closes electromagnetic induction heating tank and residual oil collection vessel after residual oil discharge
Between valve.
The cold medium import of the first negative pressure diesel oil condensing heat exchanger is equipped with solid impurity filter, in step a and b
Between be additionally provided with solid impurity filtration step.
The thermal medium outlet of the first negative pressure diesel oil condensing heat exchanger and the first negative pressure diesel oil condensing heat exchanger is converged
After connect oil water separator, be additionally provided with water-oil separating step after step f and g.
The pipeline being connected between waste mineral oil supply column lower part and the import of spiral coil is sleeved on warm water and collects draining
The external of pipe forms interlayer pipe type heat transfer structure, and the step of waste mineral oil is preheating to 30 DEG C, abandoned mine are additionally provided with before step a
The warm water that object oil passes through after getting off from supply column in interlayer pipe heat exchange structure and warm water manifold trunk carries out heat exchange, is preheated to 30
℃。
Claims (4)
1. a kind of technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil, the technique use negative pressure energy-saving formula mineral waste
The outfit of oil refining Reclaimed Base Oil and diesel oil realizes, which includes that electromagnetic induction heating tank, base oil are cold
Solidifying heat exchanger, base oil collect heat exchanger, the first negative pressure diesel oil condensing heat exchanger, the second negative pressure diesel oil condensing heat exchanger, abandoned mine
Object oil supply column, residual oil collection vessel, negative pressure pump；
The base oil condensing heat exchanger, base oil collect heat exchanger, the first negative pressure diesel oil condensing heat exchanger, the second negative pressure bavin
Oily condensing heat exchanger is the identical pipe heat exchanger of structure, which includes not being connected to but being exchanged heat by heat pipe
Cold medium channel and hot media channel,
It is equipped with the spiral coil for being close to its outer wall in the outside that base oil collects heat exchanger, is covered with heat preservation outside the spiral coil
Material, waste mineral oil supply column lower part are connected to the import of spiral coil by pipeline, the outlet of the spiral coil to
The import in the cold medium channel of one negative pressure diesel oil condensing heat exchanger,
The outlet in the cold medium channel of the first negative pressure diesel oil condensing heat exchanger is connected to the cold of base oil condensing heat exchanger by pipeline
The import of medium channel,
The outlet in the cold medium channel of base oil condensing heat exchanger is connected to electromagnetic induction heating tank oil inlet, electromagnetism by pipeline
The oil inlet of induction heating tank is located at the top of its tank body, is equipped with slag-drip opening, the slag-drip opening in the lower part of electromagnetic induction heating tank
The bottom of residual oil collection vessel is connected to by pipeline；Gaseous state oil outlet is equipped in the top of electromagnetic induction heating tank；
It is successively arranged upper interface, middle interface, lower interface from top to bottom on the hot media channel of base oil condensing heat exchanger, it is described
The gaseous state oil outlet of electromagnetic induction heating tank be connected to by pipeline on the hot media channel of base oil condensing heat exchanger
Middle interface,
Lower interface on the hot media channel of base oil condensing heat exchanger is connected to the heat that base oil collects heat exchanger by pipeline
Medium channel, the inlet end that base oil collects heat exchanger cold medium channel are connected to water source, and base oil collects cold Jie of heat exchanger
The outlet in matter channel to warm water collects drainpipe,
Upper interface on the hot media channel of base oil condensing heat exchanger is connected to the first negative pressure diesel oil condensing heat-exchange by pipeline
The thermal medium inlet of device, it is negative by pipeline connection second that the top of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel steam outlet
The thermal medium inlet on diesel oil condensing heat exchanger top is pressed, the lower part of the first negative pressure diesel oil condensing heat exchanger is equipped with diesel oil outlet and passes through
Pipeline is connected to diesel oil collection vessel,
The thermal medium outlet of second negative pressure diesel oil condensing heat exchanger bottom is connected to diesel oil collection vessel, the second negative pressure by pipeline
The cold medium import of diesel oil condensing heat exchanger connects water source, the cold medium outlet of the second negative pressure diesel oil condensing heat exchanger to temperature
Water collects drainpipe, is connected to negative pressure dress by negative tube at the top of the hot media channel of the second negative pressure diesel oil condensing heat exchanger
It sets, which also passes through the top that pipeline is connected to residual oil collection vessel；
The bottom that the base oil collects the hot media channel of heat exchanger is equipped with oil exit pipe, and the oil exit pipe is for connecting base oil
Container；The negative pressure device includes two concatenated negative pressure pumps；The electromagnetic induction heating tank is steel can, in tank
Electromagnetic induction coil is wound with outside body, which is connected to electromagnetic induction heating power supply；On each pipeline
Equipped with the electromagnetic valve controlled for on-off；
The technique includes the following steps:
A. waste mineral oil is preheating to 40-60 DEG C
Waste mineral oil first enters the outer wall of base oil collection heat exchanger by pipeline after outflow out of waste mineral oil supply column
Spiral coil is preheated, by the base oil collect heat exchanger internal gathering to base oil waste mineral oil is heated to 40-60
℃；
B. waste mineral oil is preheating to 100 DEG C
Waste mineral oil after preheating in step a enters the cold medium channel of the first negative pressure diesel oil condensing heat exchanger by pipeline,
Heat exchange is carried out with gaseous diesel, is preheating to 100 DEG C；
C. waste mineral oil is preheating to 180-200 DEG C
Waste mineral oil after preheating in step b enters the cold medium channel of base oil condensing heat exchanger by pipeline, with gaseous state
The mixture progress heat exchange of diesel oil, gaseous state base oil, is preheating to 180-200 DEG C；
D. waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil
Waste mineral oil after preheating in step c is entered inside electromagnetic induction heating tank by pipeline, is heated to 300-350 DEG C,
Waste mineral oil is boiling evaporated into the mixture of gaseous diesel, gaseous state base oil；
E. base oil condensation is collected
The mixture of gaseous diesel, gaseous state base oil in step d enters base oil from electromagnetic induction heating tank by pipeline
Heat exchange, which is carried out, with the waste mineral oil generated in step b in condensing heat exchanger is cooled to 180-200 DEG C, gaseous diesel, gaseous-based
Base oil in the mixture of plinth oil is condensed into liquid base oil, is flowed into the thermal medium that base oil collects heat exchanger by pipeline
The cold water passed through in heat exchanger is collected in channel with base oil again and the expense mineral oil from waste mineral oil charging-tank carries out simultaneously
Heat exchange is cooled to 40-60 DEG C；
F.100 a DEG C high temperature negative pressure diesel oil condensation is collected
Gaseous diesel in step e by pipeline from plinth oil condensing heat exchanger enter in the first negative pressure diesel oil condensing heat exchanger with
40-60 DEG C of the waste mineral oil preheated in step a carries out heat exchange and is cooled to 100 DEG C, is condensed into liquid diesel, forms liquid
Diesel oil exits into diesel oil collection vessel from the hot media channel lower pipeline of the first negative pressure diesel oil condensing heat exchanger；
G.30 a DEG C low-temperature negative-pressure diesel oil condensation is collected
The non-liquefied gaseous diesel of total condensation enters the second negative pressure bavin from the first negative pressure diesel oil condensing heat exchanger in step f
Heat exchange is carried out with cold water in oily condensing heat exchanger, 30 DEG C is cooled to, is condensed into liquid diesel, forms the diesel oil of liquid from second
The hot media channel lower pipeline of negative pressure diesel oil condensing heat exchanger exits into diesel oil collection vessel；
H. negative pressure deslagging
After accumulating residual oil in electromagnetic induction heating tank, negative pressure device connects residual oil collection vessel, is made by the adjustment of electromagnetic valve
Pressure in residual oil collection vessel is lower than the pressure of electromagnetic induction heating tank, the slag that bottom is accumulated in such electromagnetic induction heating tank
Oil is just entered inside residual oil collection vessel by pipeline, closes electromagnetic induction heating tank and residual oil collection vessel after residual oil discharge
Between valve.
2. the technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil according to claim 1, it is characterized in that: institute
The cold medium import for the first negative pressure diesel oil condensing heat exchanger stated is equipped with solid impurity filter, is additionally provided between step a and b
Solid impurity filtration step.
3. the technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil according to claim 1, it is characterized in that: institute
The thermal medium outlet of the first negative pressure diesel oil condensing heat exchanger and the first negative pressure diesel oil condensing heat exchanger stated connects grease after converging
Separator is additionally provided with water-oil separating step after step f and g.
4. the technique of the refining of energy-saving type waste mineral oil Reclaimed Base Oil and diesel oil according to claim 1, it is characterized in that: even
It connects the pipeline between waste mineral oil supply column lower part and the import of spiral coil and is sleeved on the external shape that warm water collects drainpipe
At interlayer pipe type heat transfer structure, it is additionally provided with the step of waste mineral oil is preheating to 30 DEG C before step a, waste mineral oil is from supply
The warm water that tower passes through after getting off in interlayer pipe heat exchange structure and warm water manifold trunk carries out heat exchange, is preheated to 30 DEG C.
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