CN109628133A - A kind of atmospheric distillation of reduction often top cooling system corrosion - Google Patents
A kind of atmospheric distillation of reduction often top cooling system corrosion Download PDFInfo
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- CN109628133A CN109628133A CN201811523228.3A CN201811523228A CN109628133A CN 109628133 A CN109628133 A CN 109628133A CN 201811523228 A CN201811523228 A CN 201811523228A CN 109628133 A CN109628133 A CN 109628133A
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- 238000001816 cooling Methods 0.000 title claims abstract description 57
- 238000005260 corrosion Methods 0.000 title claims abstract description 35
- 230000007797 corrosion Effects 0.000 title claims abstract description 34
- 238000004821 distillation Methods 0.000 title claims abstract description 27
- 230000009467 reduction Effects 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003921 oil Substances 0.000 claims description 22
- 239000002199 base oil Substances 0.000 claims description 20
- 239000000284 extract Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 9
- 239000007791 liquid phase Substances 0.000 claims description 8
- 210000003205 muscle Anatomy 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 18
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002253 acid Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 150000001805 chlorine compounds Chemical group 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/10—Inhibiting corrosion during distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
A kind of atmospheric distillation of reduction often top cooling system corrosion, it is related to oil Refining Technologies field, it uses fixed gas to extract atmospheric tower and side stripper, reduce the steam partial pressure of often top cooling system, the position that liquid acid solution is formed in normal top cooling system has been postponed, hydrochloric acid (HCl+H is avoided2S+H2O) corrosion and ammonium chloride underdeposit corrosion to reduce the requirement to the corrosion resistance of component in normal top cooling system, while reducing the consumption for etch-proof desalted water, achieve the purpose that reduce production cost.
Description
Technical field
The present invention relates to oil Refining Technologies fields, steam in particular to a kind of normal pressure of reduction often top cooling system corrosion
Evaporate method.
Background technique
Main corrosion problem in crude(oil)unit overhead condensation cooling system is caused by chloride.Crude(oil)unit
Five layers of atmospheric tower top tower tray, tower body and part volatilization line are concentrated mainly on by the position of chloride corrosion and Atmospheric Tower is cold
Solidifying cooling system." chloride corrosion " mainly includes following two mechanism: 1) hydrochloric acid (HCl+H2S+H2O) corrode；2) ammonium chloride dirt
Lower corrosion.
Currently, Atmospheric Tower condensation cooling system anticorrosive measure has: control tower top internal operating temperature is higher than water dew point
28 DEG C of temperature or more；Using " de- three notes ".Using above-mentioned measure, the corrosion of overhead condensation cooling system can only be slowed down, not
Etching problem can be solved from basic.
Summary of the invention
The purpose of the present invention is to provide a kind of atmospheric distillations of reduction often top cooling system corrosion, can effectively drop
The etching problem due to caused by chloride in low normal top cooling system, to extend the service life of equipment.
The embodiment of the present invention is achieved in that
A kind of atmospheric distillation of reduction often top cooling system corrosion comprising:
The feedstock oil exported by flash column is delivered to atmospheric tower, and inputs fixed gas into atmospheric tower, to raw material
Oil extracts；The normal base oil generated after extraction is discharged by the bottom of atmospheric tower, and gaseous component is entered normal by the top of atmospheric tower
Push up cooling system；
Atmospheric tower is equipped with multiple side strippers from top to bottom, is respectively used to extract different products；Side stripper is logical
Enter fixed gas to extract, the liquid-phase product extracted is discharged by the bottom of side stripper, and gaseous component is transmitted back to normal pressure
Tower, and often top cooling system is entered by the top of atmospheric tower.
The beneficial effect of the embodiment of the present invention is:
The embodiment of the invention provides a kind of atmospheric distillations of reduction often top cooling system corrosion, use fixed gas pair
Atmospheric tower and side stripper extract, and reduce the steam partial pressure of often top cooling system, have postponed normal top cooling system
The position that middle liquid acid solution is formed, avoids hydrochloric acid (HCl+H2S+H2O) corrosion and ammonium chloride underdeposit corrosion, to reduce pair
The requirement of the corrosion resistance of component in cooling system is often pushed up, while reducing the consumption for etch-proof desalted water, is reached
Reduce the purpose of production cost.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of extract equipment used by the embodiment of the present invention.
Icon: 100- atmospheric tower；110- dodges base oil oil inlet pipe；120- the first fixed gas air inlet pipe；130- dodges top gas air inlet
Pipe；140- drain pipe；It is recycled in 150- mono-；It is recycled in 160- bis-；200- side stripper；The normal line stripper of 210-；220-
Normal two wires stripper；230- atmosphere 3rd side cut stripper；240- the second fixed gas air inlet pipe；300- often pushes up cooling system；310- is often pushed up
Heat exchanger；320- level-one knockout drum；330- overhead air cooler device；340- often pushes up water cooler；350- second level knockout drum.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The atmospheric distillation for often pushing up cooling system corrosion to a kind of reduction of the embodiment of the present invention below is specifically described.
The air-distillation of crude oil is exactly the distillation that crude oil carries out under normal pressure (or a little higher than normal pressure), distillation equipment used
It is called atmospheric tower.Crude oil will be cut into gasoline, kerosene, light diesel fuel, heavy diesel fuel and heavy oil etc. four, five kind of product by air-distillation
Fraction.According to general polynary rectifying method, raw material could be divided into n fraction by needing n-1 rectifying column.And atmospheric tower
It is to open several side strippers in the side of tower to obtain multiple product cuts as described above.
Main corrosion problem in crude(oil)unit overhead condensation cooling system is caused by chloride.Crude(oil)unit
Five layers of atmospheric tower top tower tray, tower body and part volatilization line are concentrated mainly on by the position of chloride corrosion and Atmospheric Tower is cold
But system." chloride corrosion " mainly includes following two mechanism: 1) hydrochloric acid (HCl+H2S+H2O) corrode；2) rotten under ammonium chloride dirt
Erosion.
In the prior art, vapor is taken for the extraction of atmospheric tower and side line gas tower to carry out, due to vapor point
Pressure is high, and dew point is also just high, usually starts that liquid will be condensed at the top of atmospheric tower, and the tower top and tower top to atmospheric tower are cooling
The corrosion of system is more serious, and in order to reduce this corrosion, tower top cooling system generally requires but valence stronger using corrosion resistance
The more expensive material of lattice, or a large amount of desalted water is injected to be diluted, the difficulty of subsequent gas-liquid separation is not only caused,
Also cause the raising of production equipment cost.
Based on the above reasons, the embodiment of the invention provides a kind of reductions often to push up the atmospheric distillation that cooling system corrodes,
Comprising:
The feedstock oil exported by flash column is delivered to atmospheric tower, and inputs fixed gas into atmospheric tower, to raw material
Oil extracts；The normal base oil generated after extraction is discharged by the bottom of atmospheric tower, and gaseous component is entered normal by the top of atmospheric tower
Push up cooling system；
Atmospheric tower is equipped with multiple side strippers from top to bottom, is respectively used to extract different products；Side stripper is logical
Enter fixed gas to extract, the liquid-phase product extracted is discharged by the bottom of side stripper, and gaseous component is transmitted back to normal pressure
Tower, and often top cooling system is entered by the top of atmospheric tower.
The embodiment of the present invention extracts atmospheric tower and side stripper using fixed gas, reduces often top cooling system
Steam partial pressure, postponed it is normal top cooling system in liquid acid solution formed position, avoid hydrochloric acid (HCl+H2S+H2O) rotten
Erosion and ammonium chloride underdeposit corrosion are reduced simultaneously to reduce the requirement to the corrosion resistance of component in normal top cooling system
Consumption for etch-proof desalted water achievees the purpose that reduce production cost.
Often top cooling system includes sequentially connected normal top heat exchanger, level-one knockout drum, often top cooler and second level
Knockout drum.After entering often top cooling system by the gaseous component exported at the top of atmospheric tower, successively changed by often top heat exchanger
The liquid phase component of heat, the separation of level-one knockout drum, generation is discharged or is back to atmospheric tower, after gaseous component is mixed with desalted water
It is delivered to often top cooler.In the prior art, the formation of liquid acid solution is often pushed up in order to prevent usually before often top heat exchanger
On the one hand the corrosion of heat exchanger needs on the other hand to need normal using expensive carbon steel+two-way steel material heat exchanger
A large amount of desalted water is injected before the heat exchanger of top, and the injection of this partially desalted water, the increase of wastewater discharge is not only caused,
Also increase the burden of knockout drum.But after the method for the embodiment of the present invention, due to the steam partial pressure of Atmospheric Tower
Low, dew point is low, can just condense into acid solution before often top cooler, so the process of note desalted water can be put into often top cooler
Before, the wastewater discharge of whole system greatly reduces, meanwhile, more cheap carbon steel material can be used by often pushing up heat exchanger
Matter.
Optionally, often top cooler includes sequentially connected overhead air cooler device and often pushes up water cooler, by level-one gas-liquid separation
The gaseous component of tank output, after mixing with desalted water, successively by overhead air cooler device and often, top water cooler is cooling, is delivered to two
It is separated in grade knockout drum, the liquid phase component discharge of generation, gaseous component recycling enrichment is as fixed gas for atmospheric tower and side
Line stripper uses.By the continuous coo1ing of overhead air cooler device and normal top water cooler, better cooling effect can achieve.Together
When, gaseous component isolated in second level knockout drum is recycled, can achieve the purpose of self-produced personal, is reduced whole
The fixed gas of a system consumes.
Further, side stripper includes normal line stripper, normal two wires stripper and atmosphere 3rd side cut stripping from top to bottom
Tower；Wherein, normal two wires stripper and atmosphere 3rd side cut stripper are extracted using fixed gas, and normal line stripper does not use fixed gas
It extracts.Side stripper is to extract different product, and in the prior art, each side stripper is required to mentioning
The method for taking gas to extract, and using the embodiment of the present invention, normal line stripper are not needed using fixed gas, that is, can reach institute
The air lift effect needed reduces production cost to eliminate a large amount of fixed gas resource.
It is recycled in addition, being provided in one between normal line stripper and normal two wires stripper, to extract in atmospheric tower
Component is transmitted back to atmospheric tower after being exchanged heat again.Simultaneously, two are provided between normal two wires stripper and atmosphere 3rd side cut stripper
Middle circulation, the component to extract in atmospheric tower are transmitted back to atmospheric tower after being exchanged heat again.It recycles and is used in circulation and two in one
It takes extra heat away to be used, and improves the processing capacity of atmospheric tower.In the prior art, atmospheric tower is in addition to middle section circulation
Except, often top circulation is usually additionally provided at the top of atmospheric tower, but in embodiments of the present invention, often top circulation and often top cooling system
Simultaneously, often push up the normal top heat exchanger in cooling system is the heat exchange demand that can reach often top circulation to integration, is followed to eliminate often top
The equipment such as heat exchanger needed for ring, circulating pump, further decrease production cost.
In embodiments of the present invention, feedstock oil includes the sudden strain of a muscle base oil by flash column output and dodges top gas, dodges base oil by normal pressure
Tower bottom input dodges top gas by recycling in one and often inputting between the stripper of two wires.Wherein, the input quantity for dodging base oil is 800000
~850000kg/h, the water content for dodging base oil is 50~100kg/h；The input quantity for dodging top gas is 100000~150000kg/h,
The water content for dodging top gas is 1800~1900kg/h.Flash column itself has certain separating capacity, the sudden strain of a muscle top gas phase of output
Than in dodging for base oil, component is lighter, and water content is higher, it is injected by the middle section of atmospheric tower, can be subtracted to avoid repeated isolation
Few consumption to energy and extraction gas.
Further, using the method for the embodiment of the present invention, the pressure at the top of atmospheric tower is 0.07~0.09MPa.Herein
Under pressure, the dew point of water is at 50 DEG C hereinafter, the dew point of water is lower than the cooling section of condensation for often pushing up heat exchanger, it can be ensured that in Chang Ding
In heat exchanger heat transfer process, acid solution is not had and is formed, avoid that normal top heat exchanger is caused to corrode.
Optionally, the method for the embodiment of the present invention is carried out using equipment as shown in Figure 1 comprising atmospheric tower 100, multiple
Side stripper 200 and often top cooling system 300.
The bottom of atmospheric tower 100, which is provided with, dodges base oil oil inlet pipe 110 and the first fixed gas air inlet pipe 120, and middle part is provided with
Dodge top gas air inlet pipe 130.It enters the sudden strain of a muscle base oil of atmospheric tower 100 and dodges top gas, extract and separate through fixed gas, obtained normal base oil
It is discharged by the drain pipe 140 of 100 bottom of atmospheric tower, gaseous component enters often top cooling system 300 by the top of atmospheric tower 100.
The equipment is provided with 3 side strippers 200 altogether, respectively normal line stripper 210, normal two wires stripper 220
With atmosphere 3rd side cut stripper 230.Wherein, the bottom of normal two wires stripper 220 and atmosphere 3rd side cut stripper 230 is provided with the second fixed gas
Air inlet pipe 240.It is further extracted in side stripper 200 by the component extracted in atmospheric tower 100, liquid phase component is by side line
The bottom of stripper 200 is discharged, and gaseous component is transmitted back to atmospheric tower 100, and by entering often top cooling by the top of atmospheric tower 100
System 300.
It is provided in one between normal line stripper 210 and often two wires stripper 220 and recycles 150, normal two wires stripper 220
It is provided between atmosphere 3rd side cut stripper 230 in two and recycles 160 to take heat.Often top cooling system 300 includes sequentially connected
Often top heat exchanger 310, level-one knockout drum 320, overhead air cooler device 330, often top water cooler 340 and second level knockout drum
350, before overhead air cooler device 330, it is provided with the water injection pipe for injecting desalted water.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment provides a kind of atmospheric distillations of reduction often top cooling system corrosion, use equipment shown in FIG. 1
It carries out, specific steps include:
Feedstock oil is passed through into atmospheric tower 100, intake control is 954286kg/h, wherein feedstock oil includes dodging base oil
839525kg/h (aqueous 70kg/h) and sudden strain of a muscle top gas 114761kg/h (aqueous 1835kg/h).
It is passed through fixed gas into atmospheric tower 100, normal two wires stripper 220, atmosphere 3rd side cut stripper 230 to extract, Chang Yi
Line stripper 210 is extracted without fixed gas, and fixed gas used is often top 350 fixed gas of second level knockout drum enrichment.?
In extraction process, the fixed gas input quantity of side stripper 200 is 800kg/h, and the fixed gas input quantity of atmospheric tower 100 is
5300kg/h。
The normal base oil output quantity control in 100 bottom of atmospheric tower often pushes up oil gas output quantity at 511900kg/h, 100 top of atmospheric tower
Control is at 180115kg/h (aqueous 1905kg/h).
Through detecting, in the case where the pressure of 100 tower top of atmospheric tower is 0.08MPa (g), the dew point of water is 43.03 DEG C.Water reveals at this time
Point condenses cooling section hereinafter, condensing before often top heat exchanger 310 without acid solution in often top heat exchanger 310.Often top heat exchanger 310
Carbon steel can be used in main material.
Desalted water is infused before overhead air cooler device 330, water injection rate 2.345t/h reduces sewage discharge 6100kg/h.
Comparative example
This comparative example provides a kind of atmospheric distillation, is equally carried out using equipment shown in FIG. 1 comprising:
Feedstock oil is passed through into atmospheric tower 100, intake control is 954286kg/h, wherein feedstock oil includes dodging base oil
839525kg/h (aqueous 70kg/h) and sudden strain of a muscle top gas 114761kg/h (aqueous 1835kg/h).
It is passed through vapor into atmospheric tower 100, normal two wires stripper 220, atmosphere 3rd side cut stripper 230 to extract, Chang Yi
Line stripper 210 does not have to steam extraction.During the extraction process, the vapor input quantity of side stripper 200 is 800kg/h,
The vapor input quantity of atmospheric tower 100 is 5300kg/h.
The normal base oil output quantity control in 100 bottom of atmospheric tower often pushes up oil gas output quantity at 511900kg/h, 100 top of atmospheric tower
Control is at 180115kg/h (aqueous 8005kg/h).
Through detecting, in the case where the pressure of 100 tower top of atmospheric tower is 0.08MPa (g), the dew point of water is 73.68 DEG C.Water reveals at this time
Point condenses within cooling section in often top heat exchanger 310, has acid solution condensation before often top heat exchanger 310.Often top heat exchanger 310
Main material need to carry out anti-corrosion using carbon steel+dual phase steel.
Meanwhile note desalted water is needed before often top heat exchanger 310, water injection rate 16.14t/h guarantees that injection point has 25% liquid
State water.
By the comparison of embodiment and comparative example it can be found that air-distillation method used by the embodiment of the present invention, takes off
The consumption of salt water is only the 14.53% of comparative example, greatly reduces the consumption of desalted water and the discharge of waste water.Meanwhile by
It will not be condensed before often top heat exchanger in acid solution, relatively inexpensive carbon steel material can be used by often pushing up heat exchanger, greatly be saved
Equipment cost.In addition, in the prior art, for 8,000,000 tons/year of refinery, normal line stripper in atmospheric tower by extracting out
Group is divided into 132.91t/h, and the steam for needing to consume is 0.8t/h, the normal line stripper of the air-distillation method of the embodiment of the present invention
Stripping is not used, just eliminates above-mentioned consumption yet.Meanwhile in the prior art, often 140~160 DEG C of temperature of top circulation extraction, re-injection
Temperature is 80~130 DEG C, 350000~500000kg/h of internal circulating load, 9~20MW of heat exchange amount.And in embodiments of the present invention, into
Enter often top cooling system 120~140 DEG C of overhead oil temperature degree, 90~100 DEG C of reflux temperature, 6~10MW of heat exchange amount, basic energy
Enough reach the heat transfer effect of often top circulation, and save equipment 40~500,000/platform needed for often top recycles, greatly reduce equipment at
This.
In conclusion being adopted the embodiment of the invention provides a kind of atmospheric distillation of reduction often top cooling system corrosion
Atmospheric tower and side stripper are extracted with fixed gas, the steam partial pressure of often top cooling system is reduced, has postponed often
The position that liquid acid solution is formed in cooling system is pushed up, hydrochloric acid (HCl+H is avoided2S+H2O) corrosion and ammonium chloride underdeposit corrosion, from
And the requirement to the corrosion resistance of component in normal top cooling system is reduced, while reducing for etch-proof desalted water
Consumption achievees the purpose that reduce production cost.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of atmospheric distillation of reduction often top cooling system corrosion characterized by comprising
The feedstock oil exported by flash column is delivered to atmospheric tower, and inputs fixed gas into the atmospheric tower, to described
Feedstock oil extracts；The normal base oil generated after extraction is discharged by the bottom of the atmospheric tower, and gaseous component is by the atmospheric tower
Top enter often top cooling system；
The atmospheric tower is equipped with multiple side strippers from top to bottom, is respectively used to extract different products；The side line stripping
Tower is passed through fixed gas and extracts, and the liquid-phase product extracted is discharged by the bottom of the side stripper, and gaseous component is defeated
It sends the atmospheric tower back to, and the normal top cooling system is entered by the top of the atmospheric tower.
2. atmospheric distillation according to claim 1, which is characterized in that the normal top cooling system includes sequentially connected
Often top heat exchanger, level-one knockout drum, often top cooler and second level knockout drum；By the gas exported at the top of the atmospheric tower
After phase component enters the normal top cooling system, successively by the normal top heat exchanger heat exchange, the level-one knockout drum point
From the liquid phase component of generation is discharged or is back to the atmospheric tower, and gaseous component is delivered to often top cooling after mixing with desalted water
Device.
3. atmospheric distillation according to claim 2, which is characterized in that the normal top cooler includes sequentially connected normal
Head space cooler and often top water cooler, the gaseous component exported by the level-one knockout drum, after being mixed with desalted water, successively
It is cooling by the overhead air cooler device and the normal top water cooler, it is delivered in the second level knockout drum and separates, generation
Liquid phase component discharge, gaseous component recycling enrichment are used as fixed gas for the atmospheric tower and the side stripper.
4. atmospheric distillation according to claim 1, which is characterized in that the side stripper includes normal one from top to bottom
Line stripper, normal two wires stripper and atmosphere 3rd side cut stripper；Wherein, the normal two wires stripper and the atmosphere 3rd side cut stripper are adopted
It is extracted with fixed gas, the normal line stripper does not use fixed gas to extract.
5. atmospheric distillation according to claim 4, which is characterized in that the normal line stripper and the normal two wires vapour
It is provided in one and recycles between stripper, be transmitted back to the normal pressure again to extract after the component in the atmospheric tower is exchanged heat
Tower.
6. atmospheric distillation according to claim 5, which is characterized in that the normal two wires stripper and the atmosphere 3rd side cut vapour
It is provided in two and recycles between stripper, be transmitted back to the normal pressure again to extract after the component in the atmospheric tower is exchanged heat
Tower.
7. atmospheric distillation according to claim 6, which is characterized in that the feedstock oil includes being exported by the flash column
Sudden strain of a muscle base oil and dodge top gas, the sudden strains of a muscle base oil inputs by the atmospheric tower bottoms, and the sudden strain of a muscle top gas is by circulation and institute in described one
It states and is inputted between normal two wires stripper.
8. atmospheric distillation according to claim 7, which is characterized in that it is described dodge base oil input quantity be 800000~
850000kg/h, the water content for dodging base oil are 50~100kg/h；It is described dodge top gas input quantity be 100000~
150000kg/h, the water content for dodging top gas are 1800~1900kg/h.
9. atmospheric distillation according to claim 2, which is characterized in that the material of the normal top heat exchanger is carbon steel.
10. atmospheric distillation according to claim 1, which is characterized in that pressure at the top of the atmospheric tower is 0.07~
0.09MPa。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112048331A (en) * | 2020-08-21 | 2020-12-08 | 马金山 | Raw oil primary distillation processing device and production process |
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| CN109628133B (en) | 2021-04-27 |
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