CN105885915A - Technology for recycling light hydrocarbon through atmosphere-vacuum distillation device - Google Patents
Technology for recycling light hydrocarbon through atmosphere-vacuum distillation device Download PDFInfo
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- CN105885915A CN105885915A CN201510016628.5A CN201510016628A CN105885915A CN 105885915 A CN105885915 A CN 105885915A CN 201510016628 A CN201510016628 A CN 201510016628A CN 105885915 A CN105885915 A CN 105885915A
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Abstract
The invention discloses a technology for recycling light hydrocarbon through an atmosphere-vacuum distillation device to overcome the defects that an existing device is large in occupied area, device maintenance workloads are large, investment is high and the process is complex. The method includes the steps that crude oil enters a flash tower after being heated, oil gas on the top of the flash tower enters the upper middle portion of a normal-pressure tower, tower bottom oil of the flash tower enters the lower portion of the normal-pressure tower after being heated, and tower top oil gas of the normal-pressure tower enters a light hydrocarbon recycling unit after first-stage condensation or second-stage condensation so that dry gas, liquefied gas, naphtha and the like can be separated out, wherein stable naphtha is injected on an oil gas pipeline on the top of the normal-pressure tower or stable naphtha is injected while a low-temperature condensation device is arranged so that light hydrocarbon components in oil gas can be fully condensed in an oil phase.
Description
Technical field
The invention belongs to atmospheric and vacuum distillation field, particularly to light hydrocarbon component in a kind of flash distillation-atmospheric distillation plant
Recovery process.
Background technology
The recovery of atmospheric and vacuum distillation unit light hydrocarbon component at present mainly has two schemes, and one is " compressor side
Case "；Another kind is " compressor-free scheme ", also referred to as " primary distillation tower pressure boosting operation scheme ".
" compressor scheme " has again two kinds of methods, and most common of which one is: atmospheric and vacuum distillation unit normal pressure portion
Point use flash distillation-air-distillation process program, often top return tank separate containing light hydrocarbon oil-gas, boost through compressor
(about 1.0MPa) mixes with the often top oil after part boosting afterwards so that it is is dissolved in this part and often pushes up in oil, this
Part is often pushed up the oil that often pushes up after oil boosts with another part and is delivered to lighter hydrocarbons recovery unit respectively.Lighter hydrocarbons recovery list
Unit can set as required four-column process flow (i.e. absorption, desorbing, stable, re-absorption), three-column process flow (i.e. absorb,
Desorbing, stable), double-column process (only stabilizer and absorption tower) or single column flow process (only stabilizer),
Reclaim liquefied gas therein.
Another kind of " compressor scheme ", such as the Chinese patent of Application No. 00125975.X, this technology is open
A kind of atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons, and its method is to use fore-running-air-distillation technique side
Case, just, often pushes up oil gas and delivers to absorption tower after compressor boosts, and absorbs light hydrocarbon component therein with often top is oily,
Then together sending into stabilizer with just top oil, tower top goes out liquefied petroleum gas product, goes out to stablize Petroleum at the bottom of tower；
Meanwhile, control to stablize the temperature and pressure of tower top so that it is discharge gas absorbs to absorption tower.
In compressor scheme, because compressor is dynamic equipment (need one open one standby) so that equipment take up an area many, set
Standby maintenance workload greatly, costly, investment is high, flow process is complicated, operator are many, energy consumption of compressor is high
Shortcoming.
Compressor-free reclaims lighter hydrocarbons scheme.As interim disclosed civilian in " oil refining design " 1996 volume 26 the 2nd
Chapter, entitled " reclaiming the distilling apparatus design of lighter hydrocarbons without compressor ".The program uses fore-running-normal pressure to steam
Evaporate process program, primary distillation tower pressure boosting operation (operation pressure is typically at 0.2-0.5MPa), make in crude oil a large amount of
Light hydrocarbon component be dissolved in just in apex stone cerebrol, remaining small part light hydrocarbon component is dissolved in Chang Dingshi cerebrol,
Just, Chang Dingshi cerebrol send lighter hydrocarbons recovery unit after pump boosts (lighter hydrocarbons recovery unit can set single column flow process, double
Tower flow process, three-column process flow and four-column process flow) carry out fractional distillation, the liquefied gas that output is qualified.
Program compressor-free, overall merit is many, and one comes out, and is widely adopted.But it is (interior to need to set primary distillation tower
If about more than 20 layer tower tray), and primary distillation tower wants pressure boosting operation, which increases equipment investment and energy consumption.
Summary of the invention
It is an object of the invention to provide the technique that a kind of new atmospheric and vacuum distillation unit reclaims lighter hydrocarbons.Existing to overcome
When having flash distillation-normal pressure technology to use compressor scheme, equipment take up an area many, plant maintenance workload greatly, costly,
The shortcomings such as investment height, flow process complexity and energy consumption of compressor are high.
The present invention provides the technique that the first atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil warp
Entering flash column after intensification, the tower top oil gas of flash column enters atmospheric tower middle and upper part, the tower base oil warp of flash column
Entering atmospheric tower bottom after intensification, the tower top oil gas of atmospheric tower enters often top oil gas cold exchange device, pushes up oil from often
The logistics out of air cooling exchange device enters often top product and return tank, in Atmospheric Tower to often top product and backflow
Injecting on oil-gas pipeline between tank and stablize Petroleum, injection rate is 0.5～100 weights of Atmospheric Tower oil and gas content
Amount %, so that light hydrocarbon component all coagulates in oil phase in oil gas, often top product and the atmospheric overhead warp of return tank
After boosting, a part returns to atmospheric tower top as backflow, and remainder send lighter hydrocarbons recovery unit to separate dry gas
(C1、C2), liquefied gas (C3、C4) and Petroleum (C+ 5) etc..
The first atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that is produced from described normal top further
The temperature of product and return tank is 30～60 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
The first atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that further and described stablizes stone
The particular location that cerebrol injects, depending on the temperature and pressure stablizing Petroleum, stablizes Petroleum pressure and is more than
The pressure of decanting point tower top oil gas, it is ensured that stablizing Petroleum can inject smoothly；Stablize Petroleum temperature and injection
The temperature difference of the overhead oil temperature of point is the smaller the better, generally-100 DEG C～+100 DEG C.
The first atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that described normal top oil further
Air cooling exchange device refers at least one in heat exchanger, air cooler and recirculated water cooling condenser etc..
The present invention provides the technique that the second atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil warp
Entering flash column after intensification, the tower top oil gas of flash column enters atmospheric tower middle and upper part, the tower base oil warp of flash column
Entering atmospheric tower bottom after intensification, the tower top oil gas of atmospheric tower uses condensed in two stages, the most often top one-level oil gas
Cold exchange device, enters often top return tank and separates after partial condensation, be divided into two after the oil phase that separates is boosted
Part, a part returns atmospheric tower top, another part and the oil gas one that often top return tank separates as backflow
Entering after often playing the two grades of oil gas cold exchange devices in top and often push up products pot, often the oil phase of top products pot send lighter hydrocarbons recovery
Unit, separates dry gas (C at lighter hydrocarbons recovery unit1、C2), liquefied gas (C3、C4) and Petroleum (C+ 5)；
Injecting on oil-gas pipeline between Atmospheric Tower to often top products pot and stablize Petroleum, injection rate is atmospheric tower
0.5～100 weight % of top oil and gas content, so that light hydrocarbon component all coagulates in oil phase in oil gas.
The second atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that described normal fight back further
The temperature of stream tank is 35～120 DEG C, and pressure is gauge pressure 0.01～0.15MPa.
The second atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that is produced from described normal top further
The temperature of product tank is 30～60 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
The second atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that described Chang Dingyi further
Level oil gas cold exchange device and the often two grades of oil gas cold exchange devices in top refer to heat exchanger, air cooler and recirculated water cooling condenser
At least one in Deng.
The second atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that further and described stablizes stone
The particular location that cerebrol injects, depending on the temperature and pressure stablizing Petroleum, stablizes Petroleum pressure and is more than
The pressure of decanting point tower top oil gas, it is ensured that stablizing Petroleum can inject smoothly；Stablize Petroleum temperature and decanting point
The temperature difference of overhead oil temperature is the smaller the better, generally-100 DEG C～+100 DEG C.
The present invention provides the technique that the third atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil warp
Entering flash column after intensification, the tower top oil gas of flash column enters atmospheric tower middle and upper part, the tower base oil warp of flash column
Entering atmospheric tower bottom after intensification, the tower top oil gas of atmospheric tower often pushes up oil gas cold exchange device and normal top oil gas is low
After temperature condensing plant cooling, temperature is 1～50 DEG C, and pressure is 0.005～0.1MPa, enter often top product and
Return tank, stablizes Petroleum in Atmospheric Tower to often pushing up injection on the oil-gas pipeline between product and return tank,
Injection rate is 00.1～100 weight % of Atmospheric Tower oil and gas content, makes light hydrocarbon component in oil gas all coagulate at oil
Xiang Zhong, after often the often top oil of top product and return tank is boosted, a part returns to atmospheric tower top as backflow,
Remainder send lighter hydrocarbons recovery unit to separate dry gas (C1、C2), liquefied gas (C3、C4) and Petroleum (C+ 5)。
The third atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that described normal top oil further
Coolant media used by gas low-temperature condenser is chilled water, from chilled water production unit or other dress of this device
Put.
The third atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that is produced from described normal top further
The temperature of product and return tank is 1～50 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
The third atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that further and described stablizes stone
The particular location that cerebrol injects, depending on the temperature and pressure stablizing Petroleum, stablizes Petroleum pressure and is more than
The pressure of decanting point tower top oil gas, it is ensured that stablizing Petroleum can inject smoothly；Stablize Petroleum temperature and decanting point
The temperature difference of overhead oil temperature the smaller the better, generally-100 DEG C～+100 DEG C.
The third atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that described normal top oil further
Air cooling exchange device refers at least one in heat exchanger, air cooler and recirculated water cooling condenser etc..
The present invention provides the technique that the 4th kind of atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil warp
Entering flash column after intensification, the tower top oil gas of flash column enters atmospheric tower middle and upper part, the tower base oil warp of flash column
Atmospheric tower bottom is entered after intensification, after the tower top oil gas of atmospheric tower often pushes up the cooling of primary oil air cooling exchange device,
Temperature is 35～120 DEG C, and pressure is 0.005～0.15MPa, enters often top return tank and separates, separates
Oil phase is divided into two parts, and boosted rear portion returns atmospheric tower top, another part and Chang Ding as backflow
The oil gas that return tank separates the most often pushes up two grades of oil gas cold exchange devices and often pushes up two grades of oil gas condensation at low temperature equipment
After cooling, temperature is 1～50 DEG C, and pressure is 0.005～0.1MPa, enters and often pushes up products pot, often pushes up product
The oil phase of tank send lighter hydrocarbons recovery unit, separates dry gas (C at lighter hydrocarbons recovery unit1、C2), liquefied gas (C3、
C4) and Petroleum (C+ 5), the oil-gas pipeline between Atmospheric Tower to often top products pot injects and stablizes stone brain
Oil, injection rate is 0.1～100 weight % of Atmospheric Tower oil and gas content, makes light hydrocarbon component in oil gas all coagulate
In oil phase.
The technique of the 4th kind of atmospheric and vacuum distillation unit recovery lighter hydrocarbons is technically characterized in that described normal top two further
Level coolant media used by oil gas condensation at low temperature equipment is chilled water, from the chilled water production unit of this device
Or other device.
The technique of the 4th kind of atmospheric and vacuum distillation unit recovery lighter hydrocarbons is technically characterized in that described normal fight back further
The temperature of stream tank is 35～120 DEG C, and pressure is gauge pressure 0.005～0.15MPa.
The technique of the 4th kind of atmospheric and vacuum distillation unit recovery lighter hydrocarbons is technically characterized in that is produced from described normal top further
The temperature of product tank is 1～50 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
The technique of the 4th kind of atmospheric and vacuum distillation unit recovery lighter hydrocarbons is technically characterized in that described Chang Dingyi further
Level oil gas cold exchange device and the often two grades of oil gas cold exchange devices in top refer to heat exchanger, air cooler and recirculated water cooling condenser
At least one in Deng.
4th kind of atmospheric and vacuum distillation unit reclaims the technique of lighter hydrocarbons and is technically characterized in that further and described stablizes stone
The particular location that cerebrol injects, depending on the temperature and pressure stablizing Petroleum, stablizes Petroleum pressure and is more than
The pressure of decanting point tower top oil gas, it is ensured that stablizing Petroleum can inject smoothly；Stablize Petroleum temperature and injection
The temperature difference of some overhead oil temperature is the smaller the better, generally-100 DEG C～+100 DEG C.
Petroleum of stablizing of the present invention is from this device or other device.
Atmospheric and vacuum distillation unit of the present invention reclaims the technique of lighter hydrocarbons and can be used in atmospheric and vacuum distillation unit light
The recovery of hydrocarbon component.The technology of the present invention compared with prior art has the advantage that as follows:
1) flash distillation-atmospheric processes of the present invention, can ensure under conditions of atmospheric and vacuum distillation unit routine operation,
Stablize Petroleum by adding in tower top In Oil-gas Line, or use overhead system inject stablize Petroleum with
The method that condensation at low temperature combines, improves the absorbability of Petroleum, makes often to push up in oil gas that light hydrocarbon component can be complete
Portion is molten in over-head naphtha, thus boosts through pump, is sent to lighter hydrocarbons recovery unit, reclaims its liquefied gas.
2) at present atmospheric and vacuum distillation unit reclaims the main two schemes of lighter hydrocarbons (" compressor scheme " and " first
Evaporate tower pressure boosting operation scheme ") in, " primary distillation tower pressure boosting operation scheme " energy consumption is higher (compares the present invention program
High about 0.2-0.3kgoe/t crude oil), " compressor scheme " one-time investment equipment maintenance cost height high, dynamic,
The shortcomings such as power consumption is many, energy consumption is high, occupation of land is many, operator are many, process Processing High-sulfur High-Acidity Crude Oils, especially to pressure
The material of contracting machine, performance requirement are higher, and investment is bigger, and equipment maintenance cost is the highest.Use the present invention
Method, injects in overhead system and stablizes Petroleum, or stablizes Petroleum and low temperature in overhead system injection
The method that condensation combines, can change tower top oil gas poised state, make tower top oil gas all be dissolved in Petroleum
In.Stablize Petroleum from the bottom of this device lighter hydrocarbons recovery unit stabilizer, it is possible to quoted from outer device.Although
Petroleum is stablized in overhead system injection can increase lighter hydrocarbons recovery unit stabilizer reboiler load, but energy consumption is the most relatively
Low.By the drawings and specific embodiments, the present invention is described in further detail below, but is not limiting as this
Bright scope.
Accompanying drawing explanation
Fig. 1 is the process flow diagram that the first atmospheric and vacuum distillation unit of the present invention reclaims lighter hydrocarbons.
Fig. 2 is the process flow diagram that the second atmospheric and vacuum distillation unit of the present invention reclaims lighter hydrocarbons.
Fig. 3 is the process flow diagram that the third atmospheric and vacuum distillation unit of the present invention reclaims lighter hydrocarbons.
Fig. 4 is the process flow diagram that the 4th kind of atmospheric and vacuum distillation unit of the present invention reclaims lighter hydrocarbons.
Reference shown in figure is:
1-flash column, 2-atmospheric pressure kiln, 3-atmospheric tower, 4-often pushes up oil gas cold exchange device, and 5-often pushes up oil gas low temperature cold
Solidifying equipment, 6-often pushes up product and return tank, and 7-often pushes up product and backflow oil pump, and 8-often pushes up primary oil air cooling and changes and set
Standby, 9-often pushes up return tank, 10-normal fight back stream oil pump, and 11-often pushes up two grades of oil gas cold exchange devices, and 12-often pushes up two grades
Oil gas condensation at low temperature equipment, 13-often pushes up products pot, and 14-often pushes up product oil pump, 15-feed surge tank, and 16-inhales
Receiving tower, 17-desorber, 18-stabilizer, 19-stablizes return tank of top of the tower, and 20-stablizes Petroleum cooler.
Detailed description of the invention
As it is shown in figure 1, Fig. 1 is the technique that the first atmospheric and vacuum distillation unit reclaims lighter hydrocarbons.Crude oil is through heating up
Rear entrance flash column 1, the tower top oil gas of flash column 1 enters the middle and upper part of atmospheric tower 3, at the bottom of the tower of flash column 1
Oil enters the bottom of atmospheric tower 3 after atmospheric pressure kiln 2 heats up, and the tower top oil gas of atmospheric tower 3 enters and often pushes up oil gas
Cold exchange device 4, enters often top product and return tank 6, often from often top oil gas cold exchange device 4 logistics out
The tower top of pressure tower 3 stablizes Petroleum to often pushing up injection on the oil-gas pipeline between oil gas cold exchange device 4, injects
(stablizing Petroleum can also be cold at often top oil gas for 0.5-100 weight % that amount is the overhead oil tolerance of atmospheric tower 3
Exchange device 4, to often pushing up injection on the oil-gas pipeline between product and return tank 6, is only wherein shown in Fig. 1
A kind of situation) so that all gas is dissolved in Petroleum, under normal circumstances, often top product and return tank 6
Gas outlet without gas emissions, often the atmospheric overhead of top product and return tank 6 often pushes up product and returns
After stream oil pump 7 boosting, a part returns to the top of atmospheric tower 3 as backflow, and remainder send lighter hydrocarbons recovery
Unit, is introduced into feed surge tank 15, after through absorption tower 16, desorber 17, stabilizer 18 and stable
Return tank of top of the tower 19, separates dry gas (C1、C2), liquefied gas (C3、C4) and Petroleum (C+ 5), at normal pressure
The tower top of tower 3 is to often pushing up the stable Petroleum injected on the oil-gas pipeline between oil gas cold exchange device 4 from surely
Determine at the bottom of tower 18 tower.
The first atmospheric and vacuum distillation unit described reclaims in the technique of lighter hydrocarbons, often top product and the temperature of return tank 6
Degree is for 30-60 DEG C, and pressure is gauge pressure 0.005-0.1MPa, and the lighter hydrocarbons in Atmospheric Tower oil gas are all dissolved in
In Petroleum.
The first atmospheric and vacuum distillation unit described reclaims in the technique of lighter hydrocarbons, the stable stone brain at the bottom of stabilizer 18 tower
Oil, a portion is injected in overhead system of atmospheric tower, shown in Fig. 1 after stablizing Petroleum cooler 20 cooling
Stablize the tower top that injection phase is atmospheric tower 3 of Petroleum to often pushing up the Oil/Gas Pipe between oil gas cold exchange device 4
On line.
As in figure 2 it is shown, Fig. 2 is the technique that the second atmospheric and vacuum distillation unit reclaims lighter hydrocarbons.It is with Fig. 1's
Difference is: the tower top oil gas of atmospheric tower 3 enters often top primary oil air cooling exchange device 8, enters after heat exchange cooling
Normal top return tank 9 separates, and divides after liquid phase frequent fight back stream oil pump 10 boosting that often top return tank 9 separates
Becoming two parts, a part returns the top of atmospheric tower 3, another part and often top one-level return tank 9 as backflow
The oil gas separated enters after the most often pushing up two grades of oil gas cold exchange devices 11 and often pushes up products pot 13, under normal circumstances,
Often the gas outlet of top products pot 13 is without gas emissions, and often the oil phase of top products pot 13 often pushes up product oil
Send lighter hydrocarbons recovery unit after pump 14 boosting, often top return tank 9 to often two grades of top oil gas cold exchange devices 11 it
Between oil-gas pipeline on inject that to stablize Petroleum (be only wherein the one of stable Petroleum injection phase shown in Fig. 2
The situation of kind), injection rate is 0.5-100 weight % of the overhead oil tolerance of atmospheric tower 3.
Described the second atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, and often the temperature of top return tank 9 is
35-120 DEG C, pressure is gauge pressure 0.01-0.15MPa.
Described the second atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, and often the temperature of top products pot 13 is
30-60 DEG C, pressure is gauge pressure 0.005-0.1MPa.
Stable Petroleum at the bottom of stabilizer 18 tower, a portion is after stablizing Petroleum cooler 20 cooling
It is injected into and often pushes up return tank 9 to often pushing up on the oil-gas pipeline between two grades of oil gas cold exchange devices 11.
As it is shown on figure 3, Fig. 3 is the technique that the third atmospheric and vacuum distillation unit reclaims lighter hydrocarbons.Crude oil is through heating up
Rear entrance flash column 1, the tower top oil gas of flash column 1 enters the middle and upper part of atmospheric tower 3, at the bottom of the tower of flash column 1
Oil enters the bottom of atmospheric tower 3 after atmospheric pressure kiln 2 heats up, and the tower top oil gas of atmospheric tower 3 the most often pushes up oil
After air cooling exchange device 4 and the often condensation of top oil gas condensation at low temperature equipment 5, temperature is 1-50 DEG C, and pressure is gauge pressure
0.005-0.1MPa, enters often top product and return tank 6, at often top oil gas cold exchange device 4 to often pushing up oil gas
On oil-gas pipeline between condensation at low temperature equipment 5, Petroleum is stablized in injection (is only stable Petroleum shown in Fig. 3
The one of which situation of injection phase), injection rate is 0.1-100 weight % of the overhead oil tolerance of atmospheric tower 3,
So that all gas is dissolved in Petroleum, under normal circumstances, product and the gas outlet of return tank 6 are often pushed up
Without gas emissions, often the atmospheric overhead of top product and return tank 6 often pushes up product and backflow oil pump 7
After boosting, a part returns to the top of atmospheric tower 3 as backflow, and remainder enters lighter hydrocarbons recovery unit,
Be introduced into feed surge tank 15, after through absorption tower 16, desorber 17, stabilizer 18 and stabilizer fight back
Stream tank 19, separates dry gas (C1、C2), liquefied gas (C3、C4) and Petroleum (C+ 5)。
The third atmospheric and vacuum distillation unit described reclaims in the technique of lighter hydrocarbons, often top product and the temperature of return tank 6
Degree is for 1-50 DEG C, and pressure is gauge pressure 0.005-0.1MPa, and the lighter hydrocarbons in Atmospheric Tower oil gas are all dissolved in stone
In cerebrol.
The third atmospheric and vacuum distillation unit described reclaims in the technique of lighter hydrocarbons, the stable stone brain at the bottom of stabilizer 18 tower
Oil, a portion is injected into after stablizing Petroleum cooler 20 cooling and often pushes up oil gas cold exchange device 4 to often
On oil-gas pipeline between the oil gas condensation at low temperature equipment 5 of top.
The third described atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, often top oil gas condensation at low temperature equipment 5
Chilled water used is from system share engineering.
As shown in Figure 4, Fig. 4 is the technique that the 4th kind of atmospheric and vacuum distillation unit reclaims lighter hydrocarbons.It is with Fig. 3's
Difference is: the tower top oil gas of atmospheric tower 3 enters often top primary oil air cooling exchange device 8, temperature after heat exchange cooling
For 35-120 DEG C, pressure is gauge pressure 0.005-0.15MPa, enters often top return tank 9 and separates, often pushes up
Being divided into two parts after liquid phase that return tank 9 separates is boosted, a part is upper as backflow return atmospheric tower 3
Portion, another part frequent two grades of oil gas cold exchange devices 11 in top and normal together with the oil gas that often top return tank 9 separates
After pushing up two grades of oil gas condensation at low temperature equipment 12, temperature is 1-50 DEG C, and pressure is gauge pressure 0.005-0.1MPa,
Entering often top products pot 13, under normal circumstances, often the gas outlet of top products pot 13 is without gas emissions, often
The oil phase of top products pot 13 send lighter hydrocarbons recovery unit after often pushing up product oil pump 14 boosting, at the often two grades of oil in top
Air cooling exchange device 11 stablizes stone to often pushing up injection on the oil-gas pipeline between two grades of oil gas condensation at low temperature equipment 12
Cerebrol (being only the one of which situation of stable Petroleum injection phase shown in Fig. 4), injection rate is atmospheric tower 3
0.1-100 weight % of overhead oil tolerance.
Described 4th kind of atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, and often the temperature of top return tank 9 is
35-120 DEG C, pressure is gauge pressure 0.005-0.15MPa.
Described 4th kind of atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, and often the temperature of top products pot 13 is
1-50 DEG C, pressure is gauge pressure 0.005-0.1MPa.
Described 4th kind of atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, the stable stone brain at the bottom of stabilizer 18 tower
Oil, a portion is injected into the often two grades of oil gas cold exchange devices 11 in top after stablizing Petroleum cooler 20 cooling
On oil-gas pipeline between the often two grades of oil gas condensation at low temperature equipment 12 in top.
The 4th kind of described atmospheric and vacuum distillation unit reclaims in the technique of lighter hydrocarbons, the often two grades of oil gas condensation at low temperature in top
Chilled water used by equipment 12 is from system share engineering.
Claims (20)
1. the technique that an atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil enters after heating up
Flash column, the tower top oil gas of flash column enters atmospheric tower middle and upper part, and the tower base oil of flash column enters after heating up
Atmospheric tower bottom, the tower top oil gas of atmospheric tower enters often top oil gas cold exchange device, from often top oil gas cold exchange device
Logistics out enters often top product and return tank, in Atmospheric Tower to often pushing up the oil between product and return tank
Injecting on gas pipeline and stablize Petroleum, injection rate is 3～100 weight % of Atmospheric Tower oil and gas content, so that oily
In gas, light hydrocarbon component all coagulates in oil phase, after often the atmospheric overhead of top product and return tank is boosted, and one
Part as backflow return atmospheric tower top, remainder send lighter hydrocarbons recovery unit separate dry gas, liquefied gas and
Petroleum.
A kind of atmospheric and vacuum distillation unit the most according to claim 1 reclaims the technique of lighter hydrocarbons, and its feature exists
In: the temperature of described normal top product and return tank is 30～60 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
A kind of atmospheric and vacuum distillation unit the most according to claim 1 reclaims the technique of lighter hydrocarbons, and its feature exists
In: the described particular location stablizing Petroleum injection, depending on the temperature and pressure stablizing Petroleum, stable
Petroleum pressure is more than the pressure of decanting point tower top oil gas, it is ensured that stablizes Petroleum and injects；Stablize Petroleum temperature
Degree is-100 DEG C～+100 DEG C with the temperature difference of the overhead oil temperature of decanting point.
A kind of atmospheric and vacuum distillation unit the most according to claim 1 reclaims the technique of lighter hydrocarbons, and its feature exists
In: described normal top oil gas cold exchange device refers at least one in heat exchanger, air cooler and recirculated water cooling condenser.
5. the technique that an atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil enters after heating up
Flash column, the tower top oil gas of flash column enters atmospheric tower middle and upper part, and the tower base oil of flash column enters after heating up
Atmospheric tower bottom, the tower top oil gas of atmospheric tower uses condensed in two stages, the most often top primary oil air cooling exchange device,
Enter often top return tank after partial condensation to separate, after the oil phase that separates is boosted, be divided into two parts, one
Being allocated as returning to atmospheric tower top for backflow, another part often pushes up two together with the oil gas that often top return tank separates
Entering after level oil gas cold exchange device and often push up products pot, often the oil phase of top products pot send lighter hydrocarbons recovery unit, gently
Hydrocarbon recovery unit separates dry gas, liquefied gas and Petroleum, the oil gas between Atmospheric Tower to often top products pot
Injecting on pipeline and stablize Petroleum, injection rate is 3～100 weight % of Atmospheric Tower oil and gas content, so that oil gas
Middle light hydrocarbon component all coagulates in oil phase.
A kind of atmospheric and vacuum distillation unit the most according to claim 5 reclaims the technique of lighter hydrocarbons, and its feature exists
In: the temperature of described normal top return tank is 35～120 DEG C, and pressure is gauge pressure 0.01～0.15MPa.
A kind of atmospheric and vacuum distillation unit the most according to claim 5 reclaims the technique of lighter hydrocarbons, and its feature exists
In: the temperature of described normal top products pot is 30～60 DEG C, and pressure is gauge pressure 0.005～0.1MPa.
A kind of atmospheric and vacuum distillation unit the most according to claim 5 reclaims the technique of lighter hydrocarbons, and its feature exists
In: described normal top primary oil air cooling exchange device and the often two grades of oil gas cold exchange devices in top refer to heat exchanger, air cooler
With at least one in recirculated water cooling condenser.
A kind of atmospheric and vacuum distillation unit the most according to claim 5 reclaims the technique of lighter hydrocarbons, and its feature exists
In: the described particular location stablizing Petroleum injection, depending on the temperature and pressure stablizing Petroleum, stable
Petroleum pressure is more than the pressure of decanting point tower top oil gas, it is ensured that stablizes Petroleum and injects；Stablize Petroleum temperature
It it is-100 DEG C～+100 DEG C with the temperature difference of decanting point overhead oil temperature.
10. the technique that an atmospheric and vacuum distillation unit reclaims lighter hydrocarbons, it is characterised in that: crude oil is laggard through heating up
Entering flash column, the tower top oil gas of flash column enters atmospheric tower middle and upper part, and the tower base oil of flash column is laggard through heating up
Entering atmospheric tower bottom, the tower top oil gas of atmospheric tower often pushes up oil gas cold exchange device and normal top oil gas condensation at low temperature sets
After standby cooling, temperature is 1～50 DEG C, and pressure is 0.005～0.1MPa, enters often top product and return tank,
Stablizing Petroleum in Atmospheric Tower to often pushing up injection on the oil-gas pipeline between product and return tank, injection rate is
3～100 weight % of Atmospheric Tower oil and gas content, make light hydrocarbon component in oil gas all coagulate in oil phase, often push up product
After often top oil that product and return tank separate is boosted, a part returns atmospheric tower top, its remaining part as backflow
Dispensing lighter hydrocarbons recovery unit separates dry gas, liquefied gas and Petroleum.
11. a kind of atmospheric and vacuum distillation units according to claim 10 reclaim the technique of lighter hydrocarbons, its feature
Be: the coolant media used by the oil gas condensation at low temperature equipment of described normal top from the chilled water of this device or other
Device.
12. a kind of atmospheric and vacuum distillation units according to claim 10 reclaim the technique of lighter hydrocarbons, its feature
Being: the temperature of described normal top product and return tank is 1～50 DEG C, pressure is gauge pressure 0.005～0.1MPa.
13. a kind of atmospheric and vacuum distillation units according to claim 10 reclaim the technique of lighter hydrocarbons, its feature
It is: the described particular location stablizing Petroleum injection, depending on the temperature and pressure stablizing Petroleum, surely
Determine the Petroleum pressure pressure more than decanting point tower top oil gas, it is ensured that stablize Petroleum and inject；Stablize Petroleum temperature
Degree is-100 DEG C～+100 DEG C with the temperature difference of the overhead oil temperature of decanting point.
14. a kind of atmospheric and vacuum distillation units according to claim 10 reclaim the technique of lighter hydrocarbons, its feature
It is: described normal top oil gas cold exchange device refers at least one in heat exchanger, air cooler and recirculated water cooling condenser.
The technique that 15. 1 kinds of atmospheric and vacuum distillation units reclaim lighter hydrocarbons, it is characterised in that: crude oil is laggard through heating up
Entering flash column, the tower top oil gas of flash column enters atmospheric tower middle and upper part, and the tower base oil of flash column is laggard through heating up
Enter atmospheric tower bottom, the tower top oil gas of atmospheric tower often push up primary oil air cooling exchange device cooling after, temperature be 35～
120 DEG C, pressure is 0.005～0.15MPa, enters often top one-level return tank and separates, the oil phase liter separated
Being divided into two parts after pressure, a part returns atmospheric tower top, another part and often top one-level backflow as backflow
The oil gas that tank separates the most often pushes up two grades of oil gas cold exchange devices and often two grades of top oil gas condensation at low temperature equipment cooling
After, temperature is 1～50 DEG C, and pressure is 0.005～0.1MPa, enters and often pushes up products pot, often pushes up products pot
Oil phase send lighter hydrocarbons recovery unit, separates dry gas, liquefied gas and Petroleum at lighter hydrocarbons recovery unit, in Atmospheric Tower
Injecting on oil-gas pipeline between often top products pot and stablize Petroleum, injection rate is Atmospheric Tower oil and gas content
3～100 weight %, make light hydrocarbon component in oil gas all coagulate in oil phase.
16. a kind of atmospheric and vacuum distillation units according to claim 15 reclaim the technique of lighter hydrocarbons, its feature
Be: the coolant media used by the oil gas condensation at low temperature equipment of two grades of described normal top from this device chilled water or
Other device.
17. a kind of atmospheric and vacuum distillation units according to claim 15 reclaim the technique of lighter hydrocarbons, its feature
Being: the temperature of described normal top return tank is 35～120 DEG C, pressure is gauge pressure 0.005～0.15MPa.
18. a kind of atmospheric and vacuum distillation units according to claim 15 reclaim the technique of lighter hydrocarbons, its feature
Being: the temperature of described normal top products pot is 1～50 DEG C, pressure is gauge pressure 0.005～0.1MPa.
19. a kind of atmospheric and vacuum distillation units according to claim 15 reclaim the technique of lighter hydrocarbons, its feature
It is: described normal top primary oil air cooling exchange device and the often two grades of oil gas cold exchange devices in top refer to heat exchanger, air cooling
At least one in device and recirculated water cooling condenser.
20. a kind of atmospheric and vacuum distillation units according to claim 15 reclaim the technique of lighter hydrocarbons, its feature
It is: the described particular location stablizing Petroleum injection, depending on the temperature and pressure stablizing Petroleum, surely
Determine the Petroleum pressure pressure more than decanting point tower top oil gas, it is ensured that stablize Petroleum and inject；Stablize Petroleum
Temperature is-100 DEG C～+100 DEG C with the temperature difference of decanting point overhead oil temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016628.5A CN105885915A (en) | 2015-01-07 | 2015-01-07 | Technology for recycling light hydrocarbon through atmosphere-vacuum distillation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016628.5A CN105885915A (en) | 2015-01-07 | 2015-01-07 | Technology for recycling light hydrocarbon through atmosphere-vacuum distillation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205154A (en) * | 2019-06-10 | 2019-09-06 | 江苏新海石化有限公司 | A kind of light ends unit |
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