CN106811233B - A kind of diesel oil dewatering device and method - Google Patents
A kind of diesel oil dewatering device and method Download PDFInfo
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- CN106811233B CN106811233B CN201510854167.9A CN201510854167A CN106811233B CN 106811233 B CN106811233 B CN 106811233B CN 201510854167 A CN201510854167 A CN 201510854167A CN 106811233 B CN106811233 B CN 106811233B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/04—Diesel oil
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Abstract
The invention discloses a kind of diesel oil dewatering device and methods, belong to diesel oil dewatering field.The diesel oil dewatering device includes：Level-one is dried under reduced pressure tower, second depressurized drying tower, the first cooler, the second cooler, return tank, reflux pump, diesel pump, diesel oil air cooler.Level-one is dried under reduced pressure tower and is sequentially connected to from top to bottom with second depressurized drying tower, level-one be dried under reduced pressure the top exit of tower, the first cooler, return tank top inlet be sequentially connected with, the top exit of second depressurized drying tower, the second cooler, return tank top inlet be sequentially connected with, the feed inlet that the outlet at bottom of return tank, reflux pump, level-one are dried under reduced pressure tower top is sequentially connected with, and outlet at bottom, diesel pump, the diesel oil air cooler of second depressurized drying tower are sequentially connected with.Second cooler has both cooling and gas-liquid separating function.The diesel oil dewatering device provided through the invention can obtain as clear as crystal and water content is less than the diesel product of 100 μ g/g at 10 DEG C.
Description
Technical field
The present invention relates to diesel oil dewatering field, more particularly to a kind of diesel oil dewatering device and method.
Background technology
Diesel oil is a kind of oils, the generation of sulfur dioxide, nitrogen oxides etc. when in order to reduce diesel combustion, is needed
Hydrotreating is carried out to diesel oil.But adds the diesel product water content after hydrogen usually more than 2000 μ g/g, lead to diesel product
Turbid appearance, not only influences the using effect of diesel oil, but also can be damaged to the equipment for using diesel oil or corrosion, causes safety
Hidden danger.So pair plus hydrogen after diesel oil to carry out dehydration be steps necessary before diesel product use, and provide a kind of safe and efficient
Diesel oil dewatering device be then highly important.
The prior art provides a kind of device carrying out diesel oil dewatering using vacuum column.The vacuum column is divided into two up and down
Point, diesel oil or jet fuel enter vacuum column lower part, and flash distillation is balanced under 0-90kPa absolute pressures, the gas phase flashed off
Vacuum condensation and water-oil separating are carried out into vacuum column top, dewatered product is sent out from vacuum column lower tower bottom.The device
The moisture in diesel oil is sloughed by vacuum flashing, to obtain the diesel oil that water content is up to state standards.
Inventor has found that the prior art at least has following technical problem：
The diesel oil dewatering device dehydrating effect that the prior art provides is undesirable, although after its dehydration, diesel oil contains
Water can be up to state standards, but be extremely difficult to the as clear as crystal requirement of client's approval, i.e., at 10 DEG C, water content in diesel oil
Less than 100 μ g/g.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of water content that can obtain at 10 DEG C and be less than 100 μ g/
The diesel oil dewatering device and method of the diesel oil of g, specific technical solution are as follows：
On the one hand, an embodiment of the present invention provides a kind of diesel oil dewatering devices, including：Level-one is dried under reduced pressure tower, two level subtracts
Press drying tower, the first cooler, the second cooler, return tank, reflux pump, diesel pump, diesel oil air cooler.The level-one decompression is dry
Dry tower is sequentially connected to from top to bottom with the second depressurized drying tower；The level-one is dried under reduced pressure the top exit of tower, described
One cooler, the return tank top inlet be sequentially connected with；It is the top exit of the second depressurized drying tower, described second cold
But device, the return tank top inlet be sequentially connected with；The outlet at bottom of the return tank, the reflux pump, the level-one subtract
The feed inlet on pressure drying tower top is sequentially connected with；Outlet at bottom, the diesel pump, the diesel oil of the second depressurized drying tower
Air cooler is sequentially connected with.Second cooler has both cooling and gas-liquid separating function.
Specifically, preferably, described device further includes vacuum pump, the gas phase of the vacuum pump and second cooler
Outlet is connected.
Specifically, preferably, the level-one be dried under reduced pressure tower and the second depressurized drying tower be provided with it is multiple
The plate column of column plate.The column plate is the sieve pore tower tray with riser, and the sieve pore tower tray is staggered from top to bottom in institute
It states in plate column.
Specifically, preferably, the number of the column plate is 4-6.
On the other hand, the embodiment of the present invention additionally provides a kind of diesel oil dewatering process, including：Step a, by diesel oil fractionating column
The diesel oil of bottom outflow is introduced into the level-one and is dried under reduced pressure in tower, and under the gauge pressure of 0-30kPa, primary flash is carried out to the diesel oil
It is dry, it obtains the first gas phase portion and water content is less than the first liquid phase part of 200 μ g/g.Described in the first gas phase portion warp
The return tank is flowed into after the cooling of first cooler, first liquid phase part flows into the second depressurized drying tower.
Step b, to first liquid phase part of the inflow second depressurized drying tower, in the absolute pressure of 0-20kPa
Under, vacuum flashing drying is carried out, the second gas phase portion and second liquid phase part are obtained.Second gas phase portion flows into described the
Two coolers obtain third gas phase portion and third liquid phase part after cooling.The third liquid phase part flows into the return tank,
Substance in the return tank obtains oil phase part and aqueous portion after reflux.Reflux pump stream described in the oil phase part lease making
It returns the level-one to be dried under reduced pressure tower and be dehydrated again as raw material to be drained off, the second liquid phase part is flowed into through the diesel pump
The diesel oil air cooler is cooled down, and dewatered diesel product is obtained.
Specifically, preferably, the method further includes：Make the third gas phase portion drain into burner hearth through vacuum pump to carry out
It burns.
Specifically, preferably, the method further includes：The aqueous portion is drained into extraneous sewage network.
Specifically, preferably, the operation temperature that the level-one is dried under reduced pressure tower is 145-170 DEG C.
Specifically, preferably, the feeding temperature of the diesel oil is 150-200 DEG C.
Specifically, preferably, the cooling temperature of the diesel oil air cooler is 50 DEG C.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Diesel oil dewatering process provided in an embodiment of the present invention, by the level-one being sequentially connected to from top to bottom be dried under reduced pressure tower and
Second depressurized drying tower, to the diesel oil progress from Fractionator Bottom, expansion drying, optimizing drying effect make the water in diesel oil twice
It point is greatly decreased, to obtain at 10 DEG C, water content is less than the diesel product of 100 μ g/g.Meanwhile diesel oil is depressurized through level-one and is done
The gas phase portion that dry tower flashes off flows into return tank after cooler cools down, the gas phase portion flashed off by second depressurized drying tower
It is condensed through the second cooler, is carried out at the same time gas-liquid separation, liquid phase part also flows into return tank, and substance is after reflux in return tank
Obtained oil phase part lease making reflux pump flows back to level-one and is dried under reduced pressure tower again to be used as raw material to be drained off, to reduce diesel oil
Loss late during the dehydration process, and the operation temperature in tower is dried under reduced pressure to level-one and plays control action, ensure diesel oil dewatering
The safe operation of device.As it can be seen that the diesel oil dewatering process provided through the embodiment of the present invention, can obtain it is as clear as crystal and
Water content is less than the diesel product of 100 μ g/g at 10 DEG C, and easy to operate, energy-saving safe is convenient for large-scale promotion application.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram of diesel oil dewatering device provided in an embodiment of the present invention；
Fig. 2 is the front view for the sieve pore tower tray that further embodiment of this invention provides；
Fig. 3 is the vertical view for the sieve pore tower tray that further embodiment of this invention provides.
Reference numeral indicates respectively：
1 diesel oil,
2 level-ones are dried under reduced pressure tower,
201 sieve pore tower trays,
202 riseies,
203 open regions,
204 spraying zones,
205 areas Sheng Qi,
3 first coolers,
4 return tanks,
5 second depressurized drying towers,
6 second coolers,
7 vacuum pumps,
8 reflux pumps
9 diesel pumps,
10 diesel oil air coolers,
The first gas phase portions of A,
The first liquid phase parts of B,
The second gas phase portions of C,
D third liquid phase parts,
E third gas phase portions,
F aqueous portions,
G oil phases part,
The dewatered diesel products of H.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
On the one hand, an embodiment of the present invention provides a kind of diesel oil dewatering devices, as shown in Figure 1, the device includes：Level-one subtracts
Press drying tower 2, second depressurized drying tower 5, the first cooler 3, the second cooler 6, return tank 4, reflux pump 8, diesel pump 9, bavin
Oily air cooler 10.Level-one is dried under reduced pressure tower 2 and is sequentially connected to from top to bottom with second depressurized drying tower 5；Level-one is dried under reduced pressure tower 2
Top exit, the first cooler 3, return tank 4 top inlet be sequentially connected with；The top exit of second depressurized drying tower 5, second
Cooler 6, return tank 4 top inlet be sequentially connected with；The outlet at bottom of return tank 4, reflux pump 8, level-one are dried under reduced pressure on tower 2
The feed inlet in portion is sequentially connected with；Outlet at bottom, diesel pump 9, the diesel oil air cooler 10 of second depressurized drying tower 5 are sequentially connected with.The
Two coolers 6 have both cooling and gas-liquid separating function.
Diesel oil dewatering process provided in an embodiment of the present invention is dried under reduced pressure tower 2 by the level-one being sequentially connected to from top to bottom
With second depressurized drying tower 5, expansion drying, optimizing drying effect make bavin twice for the progress of diesel oil 1 flowed out to diesel oil Fractionator Bottom
Moisture in oil 1 is greatly decreased, to obtain the diesel product that the water content at 10 DEG C is less than 100 μ g/g.Meanwhile diesel oil is through one
Grade is dried under reduced pressure the gas phase portion that tower 2 flashes off and flows into return tank 4 after cooler cools down, and is flashed by second depressurized drying tower 5
The gas phase portion gone out is condensed through the second cooler 6, is carried out at the same time gas-liquid separation, and liquid phase part also flows into return tank 4, return tank
The oil phase part G that substance obtains after reflux in 4 flows back to level-one through reflux pump 8 and is dried under reduced pressure tower 2 as original to be drained off again
Material uses, and to reduce the loss late of diesel oil 1 during the dehydration process, and the operation temperature being dried under reduced pressure in tower 2 to level-one plays
Control action ensures the safe operation of diesel oil dewatering device.As it can be seen that the diesel oil dewatering process provided through the embodiment of the present invention,
It can obtain as clear as crystal and water content is less than the diesel product of 100 μ g/g at 10 DEG C, easy to operate, energy-saving safe is convenient for
Large-scale promotion application.
Wherein, the second cooler 6 has poly- liquid structure and liquid collecting packet, it is made to have both gas-liquid while with refrigerating function
Separation function.Since the second cooler 6 is connected with the top exit of second depressurized drying tower 5, and in the second cooler 6 almost
There is no droop loss, to ensure that the vacuum degree of second depressurized drying tower 5, and then ensures diesel oil 1 in second depressurized drying tower 5
The efficiency of middle vacuum flashing.
Specifically, a kind of diesel oil dewatering device provided in an embodiment of the present invention further includes vacuum pump 7, vacuum pump 7 and second
The gaseous phase outlet of cooler 6 is connected, and the on-condensible gas isolated from the second cooler 6 is extracted out, and burns.It does not coagulate
The energy of gas burning can be used for heating boiler etc., energy saving convenient for recycling for thermal energy.Wherein, vacuum pump 7 uses pawl
Formula vacuum pump, the small volume of claw vacuum pump, energy consumption is relatively low, and without contaminated wastewater, more safety and environmental protection.
Specifically, level-one is dried under reduced pressure tower 2 with second depressurized drying tower 5 using the arrangement side being sequentially connected to from top to bottom
Formula, floor space is less, has saved space.Meanwhile level-one be dried under reduced pressure tower 2 and second depressurized drying tower 5 be provided with it is more
The plate column of a column plate.Column plate therein is the sieve pore tower tray 201 with riser 202, and sieve pore tower tray 201 interlocks from top to bottom
It is arranged in plate column.The structure of sieve pore tower tray 201 is as shown in Figures 2 and 3, and sieve pore tower tray 201 is also divided into open region 203, spray
Drench area 204 and the areas Sheng Qi 205.Open region 203 is used to make gas phase and liquid phase substance circulation in drying tower, and realizes sieve pore tower tray
201 top-down interlaced arrangements.Spraying zone 204 is provided with multiple apertures, to improve the spray degree of scatter of diesel oil 1, more has
Conducive to the evaporation of moisture in diesel oil 1,1 flash efficiency of diesel oil is improved.The areas Sheng Qi 205 are provided with multiple riseies 202, for guiding
The moisture and lighter hydrocarbons that diesel oil 1 flashes off flow out equipment, effectively prevent the back-mixing again of water and diesel oil 1, are dodged to improve
Steam efficiency.The setting of sieve pore tower tray 201 more efficiently realizes diesel oil dewatering, wherein the number of sieve pore tower tray 201 is with 4-6
It is advisable.
On the other hand, the embodiment of the present invention additionally provides a kind of diesel oil dewatering process, including：Diesel oil is fractionated by step 101
The diesel oil 1 of bottom of tower outflow is introduced into level-one and is dried under reduced pressure in tower 2, and under the gauge pressure of 0-30kPa, it is dry to carry out primary flash to diesel oil 1
It is dry, it obtains the first gas phase portion A and water content is less than the first liquid phase part B of 200 μ g/g.First gas phase portion A is cold through first
But return tank 4 is flowed into after device 3 cools down, the first liquid phase part B flows into second depressurized drying tower 5.
Step 102, the first liquid phase part B to flowing into second depressurized drying tower 5, under the absolute pressure of 0-20kPa, into
Row vacuum flashing is dried, and the second gas phase portion C and second liquid phase part are obtained.Second gas phase portion C flows into the second cooler 6,
Third gas phase portion E and third liquid phase part D are obtained after cooling.Third liquid phase part D flows into return tank 4, the object in return tank 4
Matter obtains oil phase part G and aqueous portion F after reflux.Oil phase part G flows back to level-one through reflux pump 8 and is dried under reduced pressure 2 conduct of tower
Raw material to be drained off is dehydrated again, and second liquid phase part flows into diesel oil air cooler 10 through diesel pump 9 and cooled down, after obtaining dehydration
Diesel product H.
In diesel oil dewatering process provided in this embodiment, after level-one is dried under reduced pressure the flash distillation process of tower 2, diesel oil 1
In most water and the vaporization of part lighter hydrocarbons after outside discharge tower, i.e., the ingredient of above-mentioned first gas phase portion A is water and lighter hydrocarbons, the
One gas phase portion A flows into return tank 4.Second depressurized drying tower 5 is dried under reduced pressure level-one the diesel oil 1 flow down in tower 2, i.e., above-mentioned
First liquid phase part B, carries out vacuum flashing drying, further removes a small amount of moisture and lighter hydrocarbons in diesel oil 1.Vacuum flashing obtains
Liquid phase part, that is, second liquid phase part, water content is less than the dewatered bavin of 100 μ g/g standards when as meeting 10 DEG C
Oil, after cooling treatment be final dewatering after diesel product H.And a small amount of moisture and lighter hydrocarbons that vacuum flashing goes out, i.e.,
Two gas phase portion C are cooled down by the second cooler 6, and obtained gas phase portion is third gas phase portion E, this portion gas master
To be the lighter hydrocarbons not coagulated, this portion gas directly can be drained by burner hearth by vacuum pump 7 and burned；And from the second cooler
The liquid phase part obtained in 6, i.e. third liquid phase part D, then flow into return tank 4.
At this point, through cooling obtained liquid phase part, this part liquid after storing the flash distillation of two-stage decompression drying tower in return tank 4
Body carries out water-oil separating in return tank 4, and obtained aqueous portion F is oily wastewater, is discharged by extraneous sewage network,
Obtained from oil phase part G still condense into the lighter hydrocarbons of liquid containing diesel oil and a part, but its temperature has fallen to 40-50 DEG C.
This oil phase part G is dried under reduced pressure back to level-one in tower 2 by reflux pump 8, may be implemented to be dried under reduced pressure in tower 2 level-one and grasp
The control for making temperature, temperature when being dried under reduced pressure tower 2 into level-one due to the diesel oil 1 of diesel oil Fractionator Bottom outflow is 150-200
DEG C, so, the operation temperature that level-one is dried under reduced pressure in tower 2 can be controlled in 145-170 DEG C.Meanwhile without being dried to second depressurized
Temperature in tower 5 is controlled again.As it can be seen that diesel oil dewatering process provided by the invention can realize recycling for diesel oil 1, section
The about energy, and it is easy to operate, dehydrating effect is good, is appropriate for promoting and applying.
Specifically, the diesel oil of 5 bottom of second depressurized drying tower outflow as meets the diesel oil of water content requirement, but the diesel oil temperature
Degree is still higher, needs to be pumped into diesel oil air cooler 10 by diesel product pump and cooled down.Wherein, the outlet of diesel oil air cooler 10
Temperature is 50 DEG C.Dewatered diesel product H, dewatered bavin is as finally made through 10 diesel oil after cooling of diesel oil air cooler
The temperature of oil product H is 45-55 DEG C.
It will be described in detail below by specific embodiment：
Embodiment 1
A kind of diesel oil dewatering device is present embodiments provided, including：Level-one be dried under reduced pressure tower 2, second depressurized drying tower 5,
First cooler 3, the second cooler 6, claw vacuum pump 7, return tank 4, reflux pump 8, diesel pump 9, diesel oil air cooler 10.
Level-one is dried under reduced pressure tower 2 and is sequentially connected to from top to bottom with second depressurized drying tower 5；Level-one is dried under reduced pressure the top of tower 2
Portion outlet, the first cooler 3, return tank 4 top inlet be sequentially connected with；It is the top exit of second depressurized drying tower 5, second cold
But device 6, return tank 4 top inlet be sequentially connected with；Vacuum pump 7 is connected with the gaseous phase outlet of the second cooler 6；Return tank 4
The feed inlet that outlet at bottom, reflux pump 8, level-one are dried under reduced pressure 2 top of tower is sequentially connected with；The bottom of second depressurized drying tower 5 goes out
Mouth, diesel pump 9, diesel oil air cooler 10 are sequentially connected with.
Wherein, the second cooler 6 has both cooling and gas-liquid separating function.
It is plate column that level-one, which is dried under reduced pressure tower 2 and second depressurized drying tower 5, and 5 are provided in each plate column from upper
The column plate being staggered under and, column plate are the sieve pore tower tray 201 with riser 202, and sieve pore tower tray 201 is also divided into open region
203, spraying zone 204 and the areas Sheng Qi 205, concrete structure is as shown in Figures 2 and 3.
Embodiment 2
The present embodiment uses the diesel oil dewatering device provided in embodiment 1, carries out diesel oil dewatering, includes the following steps：
The diesel oil 1 that 180 DEG C of diesel oil Fractionator Bottom flows out is introduced into level-one and is dried under reduced pressure in tower 2 by step 1,25kPa's
Under gauge pressure, primary flash drying is carried out to diesel oil, the operation temperature that level-one is dried under reduced pressure in tower 2 maintains 145-170 DEG C, to bavin
After oil carries out primary flash drying, the first gas phase portion A and water content are obtained as the first liquid phase part B of 180 μ g/g.First gas
Phase part A flows into return tank 4 after the cooling of the first cooler 3, and the first liquid phase part B flows into second depressurized drying tower 5.
Step 2, the first liquid phase part B to flowing into second depressurized drying tower 5 are carried out true under the absolute pressure of 15kPa
Empty expansion drying obtains the second gas phase portion C and second liquid phase part.Second gas phase portion C flows into the second cooler 6, cooling
After obtain third gas phase portion E and third liquid phase part D.Third gas phase portion E drains into burner hearth through vacuum pump 7 and is burned.The
Three liquid phase part D flow into return tank 4, and the substance in return tank 4 obtains oil phase part G and aqueous portion F after reflux.Water phase
Part F drains into extraneous sewage network, and oil phase part G flows back to level-one through reflux pump 8 and is dried under reduced pressure tower 2 as raw material to be drained off progress
It is dehydrated again, wherein the temperature of oil phase part G is 45 DEG C.Second liquid phase part carries out cold through the inflow diesel oil of diesel pump 9 air cooler 10
But.Finally, the dewatered diesel product H that water content is 85 μ g/g when temperature is 50 DEG C, 10 DEG C is obtained.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (6)
1. the method for carrying out diesel oil dewatering using diesel oil dewatering device, the diesel oil dewatering device include：Level-one be dried under reduced pressure tower,
Second depressurized drying tower, the first cooler, the second cooler, return tank, reflux pump, diesel pump, diesel oil air cooler；
The level-one is dried under reduced pressure tower and is sequentially connected to from top to bottom with the second depressurized drying tower；The level-one is dried under reduced pressure tower
Top exit, first cooler, the return tank top inlet be sequentially connected with；The top of the second depressurized drying tower
Portion outlet, second cooler, the return tank top inlet be sequentially connected with；It is the outlet at bottom of the return tank, described
The feed inlet that reflux pump, the level-one are dried under reduced pressure tower top is sequentially connected with；The outlet at bottom of the second depressurized drying tower, institute
State diesel pump, the diesel oil air cooler is sequentially connected with；
Second cooler has both cooling and gas-liquid separating function；
The method includes：
Step a, the diesel oil that diesel oil Fractionator Bottom flows out is introduced into level-one to be dried under reduced pressure in tower, under the gauge pressure of 0-30kPa, to institute
It states diesel oil and carries out primary flash drying, obtain the first gas phase portion and water content is less than the first liquid phase part of 200 μ g/g, it is described
First gas phase portion flows into return tank after the cooling of the first cooler, and first liquid phase part flows into second depressurized drying tower；
Step b, to first liquid phase part of the inflow second depressurized drying tower, under the absolute pressure of 0-20kPa, into
Row vacuum flashing is dried, and the second gas phase portion and second liquid phase part are obtained, and second gas phase portion flows into the second cooler,
Obtain third gas phase portion and third liquid phase part after cooling, the third liquid phase part flows into return tank, in the return tank
Substance after reflux, obtain oil phase part and aqueous portion, it is dry that the oil phase part lease making reflux pump flows back to the level-one decompression
Dry tower is dehydrated again as raw material to be drained off, and the second liquid phase part carries out cold through the diesel pump inflow diesel oil air cooler
But, dewatered diesel product is obtained.
2. diesel oil dewatering process according to claim 1, which is characterized in that the method further includes：Make the third gas
Mutually part drains into burner hearth through vacuum pump and is burned.
3. diesel oil dewatering process according to claim 1, which is characterized in that the method further includes：By the water phase portion
Divide and drains into extraneous sewage network.
4. diesel oil dewatering process according to claim 1, which is characterized in that the level-one is dried under reduced pressure the operation temperature of tower
It is 145-170 DEG C.
5. diesel oil dewatering process according to claim 1, which is characterized in that the feeding temperature of the diesel oil is 150-200
℃。
6. diesel oil dewatering process according to claim 1, which is characterized in that the cooling temperature of the diesel oil air cooler is 50
℃。
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| CN104069652A (en) * | 2013-03-29 | 2014-10-01 | 王文兵 | Low-volatile liquid vacuum dehydrating method and device |
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