CN107760355A - A kind of stable light hydrocarbon recovery system and its recovery method - Google Patents
A kind of stable light hydrocarbon recovery system and its recovery method Download PDFInfo
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- CN107760355A CN107760355A CN201711249643.XA CN201711249643A CN107760355A CN 107760355 A CN107760355 A CN 107760355A CN 201711249643 A CN201711249643 A CN 201711249643A CN 107760355 A CN107760355 A CN 107760355A
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- light hydrocarbon
- outlet
- stable light
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- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 84
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 84
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 55
- 238000011084 recovery Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 19
- 238000007599 discharging Methods 0.000 claims abstract description 28
- 230000008676 import Effects 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 86
- 239000012071 phase Substances 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 230000009897 systematic effect Effects 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
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
-
- 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
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
-
- 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
-
- 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
- C10G7/12—Controlling or regulating
-
- 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
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/40—Characteristics of the process deviating from typical ways of processing
- C10G2300/4006—Temperature
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)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The present invention discloses a kind of stable light hydrocarbon recovery system,Including heat exchanger,Separator,Rectifying column,Reboiler,Heat exchanger includes the first import,First outlet and the second import,Second outlet,Raw material feed channel is connected with first import,First outlet is connected with the charging aperture of separator by pipeline,Separator is provided with the first gas outlet and the first discharging opening,First gas outlet is arranged on separator top,First gas outlet is connected with gas vent by pipeline,First discharging opening is arranged on separator bottom,First discharging opening is connected with the charging aperture of rectifying column by pipeline,The second gas outlet is provided with the top of rectifying column,Second gas outlet is connected with gas vent by pipeline,Rectifier bottoms are connected with reboiler,The bottom of reboiler is provided with the second discharging opening,Second import of the second discharging opening and heat exchanger passes through pipeline communication,Stable light hydrocarbon recovery channel is connected with the second outlet of heat exchanger.The system light hydrocarbon recovery rate is high, separation accuracy is high.
Description
Technical field
The present invention relates to oil refinery technical field, and in particular to a kind of stable light hydrocarbon recovery system and its recovery method.
Background technology
Lighter hydrocarbons refer to what is extracted from gas reducing liquid, using pentane and heavier hydro carbons as the oil product of main component, its end
Boiling point is not higher than 190 DEG C, under defined vapour pressure, it is allowed to contain a small amount of butane, also referred to as natural gasoline.
Stable light hydrocarbon may generally serve as producing the raw material of solvent naphtha, and there are two classes in its source, and one kind is that crude oil passes through flash distillation, from
Settled down in flashed vapour, component is heavier, and color is generally transparent faint yellow or yellowish-brown；Another kind of is associated gas
Or the pentane above component contained in other natural gases, separated by the process such as freezing and compress, general isopentane content compared with
Height, pentane above component is less, and color is generally transparent colourless.
For stable light hydrocarbon due to low containing aromatic hydrocarbons, molten wax ability is strong, is the desirable feedstock for producing solvent naphtha and well wax clearing agent for oil；Mesh
Before, methods of light hydrocarbon recovery mainly includes absorption method, oil-absorption process and condensation separation method.Absorption method is using having loose structure
The solid absorbent difference strong and weak to hydrocarbon component adsorption capacity, and the method for enabling hydrocarbon gas to separate, its principle and stream
Journey is similar to molecular sieve adsorbing and dewatering.Oil-absorption process is then the difference based on the solubility in oil is absorbed of each component in natural gas,
And the method for enabling different hydrocarbons gas to separate.Condensation separation method is to utilize each hydrocarbon component condensation temperature in natural gas different
The characteristics of, natural gas is cooled to certain temperature by freezing, so as to divide by the higher hydro carbons condensation separation of boiling point, and by condensate liquid
Evaporate into the method for qualified products.Because absorption method and oil-absorption process are present, high energy consumption, operating cost are high low with product yield etc. to be lacked
Point, progressively substituted by more economical and advanced condensation separation method.However, deposited in existing condensation method natural gas methods of light hydrocarbon recovery
Not high in light hydrocarbon recovery rate, separation accuracy is low, and the hydrocarbon liquid inferior quality and source of the gas of separation are poor for applicability, and the scope of application is limited etc.
Shortcoming.
The content of the invention
In view of this, the application provide that a kind of light hydrocarbon recovery rate is high, separation accuracy is high and can realize automatically control and
The higher stable light hydrocarbon recovery system of security.
To solve above technical problem, technical scheme provided by the invention is a kind of stable light hydrocarbon recovery system, including is changed
Hot device, separator, rectifying column, reboiler and PLC, the heat exchanger includes the first import, first outlet and second is entered
Mouth, second outlet, the raw material feed channel are connected with first import, the first outlet and the first of the separator
Charging aperture is connected by pipeline, and the separator is provided with the first gas outlet and the first discharging opening, and first gas outlet is set
Put and be connected in the separator top, first gas outlet with gas vent by pipeline, first discharging opening is arranged on
The separator bottom, first discharging opening are connected with the second charging aperture of rectifying column by pipeline, the rectifying column
Top is provided with the second gas outlet, and second gas outlet is connected with gas vent by pipeline, and the rectifier bottoms connect
Reboiler is connected to, the bottom of the reboiler is provided with the second discharging opening, second discharging opening and the second of the heat exchanger
Import is connected with stable light hydrocarbon recovery channel by pipeline communication at the second outlet of the heat exchanger.
Preferably, the heat exchanger, separator and reboiler bottom are provided with blowoff valve, the blowoff valve by pipeline with
Sewage draining exit is connected.
Preferably, the first ball valve, sampling gauge valve, the first axial-flow type are disposed with the stable light hydrocarbon recovery channel
Regulating valve and first flow control device, first axial flow control valve are connected with PLC.
Preferably, the second ball valve and the 3rd ball are respectively arranged with the second entrance and second outlet of the heat exchanger
Valve, second ball valve and the 3rd ball valve both ends have been arranged in parallel the first stop valve, one end of first stop valve with it is described
Second discharging opening of reboiler is connected, and gently recovery channel is connected the other end with the stabilization.
Preferably, it is provided with first liquid level gauge on the separator lower end, the first discharging opening on the separator and essence
Evaporate and the 4th ball valve, the second axial flow control valve and second flow control are disposed with the pipeline between the second charging aperture of tower
Device, second axial flow control valve and the second flow control device are connected with PLC respectively.
Preferably, first pressure transmitter is connected on the pipeline between the first gas outlet of the separator and gas vent
With the 3rd axial flow control valve, the first pressure transmitter and the 3rd axial flow control valve respectively with PLC controller phases
Connection.
Preferably, it is provided with second pressure on the pipeline between the second gas outlet at the top of the rectifying column and gas vent
Transmitter and the 4th axial flow control valve, the second pressure transmitter are controlled with PLC respectively with the 4th axial flow control valve
Device processed is connected.
Preferably, second liquid level gauge is provided with the reboiler, the second liquid level gauge is connected with PLC.
Preferably, the top of the separator and the rectifying column is respectively arranged with gas safety outlet.
Preferably, it is provided with quick action emergency valve in the raw material feed channel.
Present invention also offers a kind of stable light hydrocarbon recovery method, it is characterised in that comprises the following steps：
(1) unstripped gas is entered in separator after heat exchanger heats up, lighter hydrocarbons separate out after heating in separator
One gas is discharged into out-of-bounds by separator top into gas phase pipeline, and the first lighter hydrocarbons isolated in separator are by separator bottom
Outlet outflow, enters rectifying column from rectifier；
(2) first lighter hydrocarbons obtain the second lighter hydrocarbons in rectifying column and lower into reboiler after rectifying, and the second lighter hydrocarbons exist
Heating separates out second gas in reboiler, obtains stable light hydrocarbon, and the second gas rises at the top of rectifying column and is emitted into out-of-bounds,
The stable light hydrocarbon is reclaimed after heat exchanger cools.
Compared with prior art, its detailed description is as follows by the application：This application provides a kind of stable light hydrocarbon recovery system,
The system includes heat exchanger, separator, rectifying column, reboiler and PLC, and unstripped gas to be recycled enters from raw material feed channel
Enter into system, quick action emergency valve is provided with unstripped gas entrance, when being in an emergency in system or dangerous situation
When, unstripped gas can be made to be cut off from porch, to ensure the safety of whole system.Heat exchanger include the first import, first outlet,
Second import and second outlet, unstripped gas enters heat exchanger from the first import and collects carry out heat exchange, then from first outlet
Discharge, the first charging aperture of separator is entered by pipeline, and unstripped gas can separate out the first gas after heating in the separator
Body, this part first gas are discharged by being arranged on the first gas outlet at the top of separator, and the liquid phase isolated in separator is light
Hydrocarbon enters rectifying through electric control valve, flowmeter by the discharging opening of separator bottom first from the second charging aperture at the top of rectifying column
Tower, the lighter hydrocarbons after filling extract rectification lower into reboiler, have heater in reboiler, the electrical heating setting in reboiler
Temperature is 105 DEG C, and it is second gas that liquid light hydrocarbon separates out gaseous component again after heating, and second gas rises through rectifying column
Second gas outlet at top is drawn, and the second gas outlet is connected by pipeline with gas vent, converged after axial flow control valve
Enter separator and guide gas phase pipeline out-of-bounds into, remaining lighter hydrocarbons are stable light hydrocarbon after reboiler heats and separates out gas phase, from weight
Second discharging opening of boiling device bottom draws the second import into heat exchanger, exchanges heat and drops with the relatively low unstripped gas of temperature in heat exchanger
After temperature then output is reclaimed to it to stable light hydrocarbon recovery channel and obtains stable light hydrocarbon product.
In addition, in the system that the application provides, the heat exchanger, separator and reboiler bottom are provided with blowoff valve, institute
Blowoff valve is stated by pipeline with sewage draining exit to be connected.The blowoff valve is valve cover drainage valve, has self-cleaning function, while close
Front cover has the characteristics of resistance to erosion, and the dirt of container bottom can be made to discharge clean usage time length simultaneously, add whole system
The service life of system.
The first gas that lighter hydrocarbons separate out after heating in separator enters gas phase pipe by first gas outlet on separator top
The axial flow control valves of Lu Jing tri- are gone out-of-bounds, and the 3rd axial flow control valve and separator pressure are chain, are controlled to adjust and separated by PLC
Device pressure；The liquid phase lighter hydrocarbons isolated in separator are by separator bottom first time discharging opening through the second axial flow control valve,
Two flows, which are controlled from the second charging aperture of rectifier, enters rectifying column, and the lighter hydrocarbons after filling extract rectification lower into reboiling
Device, wherein the second axial flow control valve and separator liquid level are chain, separator liquid level is controlled by PLC, separator liquid is set
Position low alarm, full level alarm.
It is 105 DEG C that electrical heating, which sets temperature, in reboiler, and liquid light hydrocarbon separates out second gas again, and second gas rises
Through rectifying column Base top contact, remittance separator guides gas phase pipeline out-of-bounds into after the 4th axial flow control valve, is set on rectifying column
Second pressure transmitter is equipped with, the 4th axial flow control valve and reboiler pressure are chain, and reboiler is controlled to adjust by PLC
Pressure.Temperature transmitter is additionally provided with reboiler, during being electrically heated in reboiler to lighter hydrocarbons, is examined by temperature transmitter
Survey fluid temperature and be sent to PLC and chain control is carried out to electric heater, reboiler temperature sets high alarm, high alarm；For peace
Entirely, the detection of reboiler casing surface temperature is separately set, high alarm, high alarm, reboiler fluid temperature or surface of shell are set
Electric emergency cut-off valve turns off during temperature height height alarm, and heating tube stops heating.It is remaining after reboiler heats and separates out gas phase
As stable light hydrocarbon, draw into heat exchanger from the second discharging opening of reboiler bottom, cool with being exchanged heat from unstripped gas out-of-bounds
By the first axial flow control valve, first flow control device, the output of the first ball valve out-of-bounds；The second liquid level is provided with reboiler
Meter, first axial flow control valve and reboiler liquid level are chain, and reboiler liquid level is controlled by PLC, set liquid level low
Position alarm, low alarm, full level alarm, electric emergency cut-off valve turns off during low low alarm, and heating tube stops heating.
For the safety of system, gas safety outlet is respectively arranged with the top of separator and rectifying column, when gas goes out
When pressure in mouth pipeline is excessive, then gas safety outlet is opened, first gas and second gas is put from gas safety outlet
It is empty.
In summary, the beneficial effects of the present invention are：This set system belongs to the intelligent equipment controlled by PLC, system
Fully automatic operation after startup, after each regulating valve is by manually setting systematic parameter, according to the actual pressure of each station in system process
The operating modes such as power, liquid level automatically adjust valve aperture, while the automatic switch of heater is performed according to reboiler temperature, realize height
The automation of degree, saves manpower and materials, solves cost for actual production.
Multiple safety devices are provided with system, it is ensured that the safe operation of whole system, the blowdown in simultaneity factor
Valve is valve cover drainage valve, has self-cleaning function, while sealing surface has the characteristics of resistance to erosion, can make container bottom
The clean usage time length simultaneously of dirt discharge, add the service life of whole system.In addition, heat exchanger in system is by temperature
Relatively low unstripped gas carries out heat exchange with the higher stable light hydrocarbon of temperature, has saved mass energy, has realized the effect of energy-saving and emission-reduction
Fruit.By being separated to the heating for multiple times of lighter hydrocarbons in the system, make that the rate of recovery of lighter hydrocarbons is more preferable, and precision is higher, quality is more preferable.
Brief description of the drawings
Fig. 1 is the structural representation for the stable light hydrocarbon recovery system that the application provides.
In figure, 1- heat exchangers, 2- separators, 3- rectifying columns, 4- reboilers, 5- quick action emergency valves, 6- blowoff valves, 7- first
Axial flow control valve, the axial flow control valves of 8- second, the axial flow control valves of 9- the 3rd, the axial flow control valves of 10- the 4th, 11-
One volume control device, 12- second flow control devices, 13- first pressure transmitters, 14- second pressure transmitters, 15-
One liquid level gauge, 16- second liquid level gauges, 17- sampling gauge valves, the ball valves of 18- first, the ball valves of 19- second, the ball valves of 20- the 3rd, 21-
4th ball valve, the stop valves of 22- first, 23- temperature transmitters, the imports of 24- first, 25- first outlets, the imports of 26- second, 27-
Second outlet, 28- first charging apertures, 29 first discharging openings, 30- second charging apertures, the gas outlets of 31- second, 32- second discharge
Mouthful, the gas outlets of 33- first.
Embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment pair
The present invention is described in further detail.
Embodiment 1
The schematic flow sheet of the present embodiment is as shown in figure 1, this application provides a kind of stable light hydrocarbon recovery system, the system
Including heat exchanger 1, separator 2, rectifying column 3, reboiler 4 and PLC, its specific workflow is：Original to be recycled
Material gas is entered in system from raw material feed channel, quick action emergency valve 5 is provided with unstripped gas entrance, when occurring in system
When emergency or dangerous situation, unstripped gas can be made to be cut off from porch, to ensure the safety of whole system.Heat exchanger includes
First import 24, first outlet 25, the second import 26 and second outlet 27, unstripped gas enter heat exchanger 1 from the first import 24
Middle carry out heat exchange, is then discharged from first outlet 25, and the first charging aperture 28 of separator 2, unstripped gas are entered by pipeline
First gas can be separated out after heating in the separator, this part first gas goes out by being arranged on first at the top of separator
Gas port 33 is discharged, the liquid phase lighter hydrocarbons isolated in separator 2 by separator bottom the first discharging opening 29 at the top of rectifying column
Two charging apertures 30 enter rectifying column 3, and the lighter hydrocarbons after filling extract rectification lower into reboiler 4, have heating to fill in reboiler 4
Put, it is 105 DEG C that electrical heating, which sets temperature, in reboiler, and it is the second gas that liquid light hydrocarbon separates out gaseous component again after heating
Body, second gas rises draws through the second gas outlet 31 at the top of rectifying column, and the second gas outlet 31 passes through pipeline with gas vent
It is connected, remittance separator guides gas phase pipeline out-of-bounds into after axial flow control valve, after reboiler heats and separates out gas phase
Remaining lighter hydrocarbons are stable light hydrocarbon, and the second import 26 into heat exchanger is drawn from the second discharging opening 32 of the bottom of reboiler 4,
Output to stable light hydrocarbon recovery channel, is then reclaimed to it after the unstripped gas relatively low with temperature heat exchange cooling in heat exchanger 1
Obtain stable light hydrocarbon product.
In addition, in the system that the application provides, the heat exchanger 1, separator 2 and the bottom of reboiler 4 are provided with blowoff valve
6, the blowoff valve 6 is connected by pipeline with sewage draining exit.The blowoff valve is valve cover drainage valve, has self-cleaning function,
Sealing surface has the characteristics of resistance to erosion simultaneously, and the dirt of container bottom can be made to discharge clean usage time length simultaneously, added
The service life of whole system.
The first gas that lighter hydrocarbons separate out after heating in separator 2 enters gas phase by first gas outlet 33 on separator top
Pipeline is gone out-of-bounds through the 3rd axial flow control valve 9, and first pressure transmitter 13, the regulation of the 3rd axial-flow type are provided with the top of separator
Valve 9 and separator pressure are chain, and separator pressure is controlled to adjust by PLC；The liquid phase lighter hydrocarbons isolated in separator are by separator
Bottom first time discharging opening 29 enters through the second axial flow control valve 8, second flow control device 12 from the second of rectifier
Material mouth 30 enters rectifying column 3, and the lighter hydrocarbons after filling extract rectification lower into reboiler 4, wherein the second axial flow control valve 8 with
The liquid level of separator 2 is chain, and first liquid level gauge 15 is provided with separator, controls the liquid level of separator 2 by PLC, sets separation
Device liquid level low alarm, full level alarm.
It is 105 DEG C that electrical heating, which sets temperature, in reboiler, and liquid light hydrocarbon separates out second gas again, and second gas rises
Drawn through the second gas outlet of rectifying column 31, remittance separator guides gas phase pipeline out-of-bounds into after the 4th axial flow control valve 10,
Second pressure transmitter 14, the 4th axial flow control valve 10 and the pressure interlock of reboiler 2 are provided with rectifying column, by PLC
Control to adjust reboiler pressure.Temperature transmitter 23 is additionally provided with reboiler, process is electrically heated to lighter hydrocarbons in reboiler
In, fluid temperature is detected by temperature transmitter 23 and is sent to PLC chain control is carried out to electric heater, reboiler temperature sets
Height alarm, high alarm；It is another that the detection of reboiler casing surface temperature is set for safety, high alarm, high alarm, reboiling are set
Electric emergency cut-off valve turns off when device fluid temperature or casing surface temperature height height alarm, and heating tube stops heating.Through reboiler
It is stable light hydrocarbon that heating, which separates out remaining after gas phase, and the into heat exchanger is drawn from the second discharging opening 32 of the bottom of reboiler 2
Two imports 26, with from out-of-bounds unstripped gas heat exchange cooling after through the first axial flow control valve 7, first flow control device 11,
First ball valve 18 exports out-of-bounds；Second liquid level gauge 16, first axial flow control valve 7 and reboiler liquid are provided with reboiler
Position is chain, and reboiler liquid level is controlled by PLC, sets the low low alarm of liquid level, low alarm, full level alarm, low level report
Electric emergency cut-off valve turns off when alert, and heating tube stops heating.
27 are respectively arranged with the second ball valve 19 and the 3rd ball valve 20, institute at the second entrance 26 and second outlet of heat exchanger
State the second ball valve 19 and the both ends of the 3rd ball valve 20 have been arranged in parallel the first stop valve 22, one end of first stop valve 22 and institute
The second discharging opening 28 for stating reboiler is connected, and gently recovery channel is connected the other end with the stabilization.In the first ball valve 18
Sampling gauge valve 17 is additionally provided between the first axial flow control valve 7, for being sampled to stable light hydrocarbon.
For the safety of system, gas safety outlet is respectively arranged with the top of separator and rectifying column, when gas goes out
When pressure in mouth pipeline is excessive, then gas safety outlet is opened, first gas and second gas is put from gas safety outlet
It is empty.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of stable light hydrocarbon recovery system, including heat exchanger, separator, rectifying column, reboiler and PLC, its feature
Be, the heat exchanger includes the first import, first outlet and the second import, second outlet, the raw material feed channel with it is described
First import is connected, and the first outlet is connected with the charging aperture of the separator by pipeline, and the separator is set
Have the first gas outlet and the first discharging opening, first gas outlet is arranged on the separator top, first gas outlet with
Gas vent is connected by pipeline, and first discharging opening is arranged on the separator bottom, first discharging opening and rectifying
The charging aperture of tower is connected by pipeline, and the second gas outlet, second gas outlet and gas are provided with the top of the rectifying column
Body outlet is connected by pipeline, and the rectifier bottoms are connected with reboiler, and the bottom of the reboiler is provided with second and gone out
Material mouth, the second import of second discharging opening and the heat exchanger is by pipeline communication, at the second outlet of the heat exchanger
It is connected with stable light hydrocarbon recovery channel.
2. stable light hydrocarbon recovery system according to claim 1, it is characterised in that the heat exchanger, separator and reboiling
Device bottom is provided with blowoff valve, and the blowoff valve is connected by pipeline with sewage draining exit.
3. stable light hydrocarbon recovery system according to claim 1, it is characterised in that on the stable light hydrocarbon recovery channel according to
It is secondary to be provided with the first ball valve, sampling gauge valve, the first axial flow control valve and first flow control device, first axial-flow type
Regulating valve is connected with PLC.
4. stable light hydrocarbon recovery system according to claim 1, it is characterised in that the second entrance of the heat exchanger and
The second ball valve and the 3rd ball valve are respectively arranged with second outlet, second ball valve and the 3rd ball valve both ends have been arranged in parallel
One stop valve, one end of first stop valve are connected with the second discharging opening of the reboiler, the other end and the stabilization
Gently recovery channel is connected.
5. stable light hydrocarbon recovery system according to claim 1, it is characterised in that is provided with the separator lower end
Is disposed with one liquid level gauge, the first discharging opening on the separator and the pipeline between the second charging aperture of rectifying column
Four ball valves, the second axial flow control valve and second flow control device, second axial flow control valve and the second flow
Control device is connected with PLC respectively.
6. stable light hydrocarbon recovery system according to claim 1, it is characterised in that the first gas outlet of the separator with
Connect first pressure transmitter and the 3rd axial flow control valve on pipeline between gas vent, the first pressure transmitter with
3rd axial flow control valve is connected with PLC respectively.
7. stable light hydrocarbon recovery system according to claim 1, it is characterised in that the second outlet at the top of the rectifying column
Second pressure transmitter and the 4th axial flow control valve are provided with pipeline between mouth and gas vent, the second pressure becomes
Device is sent to be connected respectively with PLC with the 4th axial flow control valve.
8. stable light hydrocarbon recovery system according to claim 1, it is characterised in that the second liquid is provided with the reboiler
Position meter, the second liquid level gauge are connected with PLC.
9. stable light hydrocarbon recovery system according to claim 1, it is characterised in that be provided with the raw material feed channel tight
Anxious stop valve.
10. a kind of stable light hydrocarbon recovery method, it is characterised in that comprise the following steps：
(1) unstripped gas is entered in separator after heat exchanger heats up, the first gas that lighter hydrocarbons separate out after heating in separator
Body is discharged into out-of-bounds by separator top into gas phase pipeline, and the first lighter hydrocarbons isolated in separator are by separator lower part outlet
Outflow, enters rectifying column from rectifier；
(2) first lighter hydrocarbons obtain the second lighter hydrocarbons in rectifying column and lower into reboiler after rectifying, and the second lighter hydrocarbons are in reboiling
Heating separates out second gas in device, obtains stable light hydrocarbon, the second gas rises at the top of rectifying column and is emitted into out-of-bounds, described
Stable light hydrocarbon is reclaimed after heat exchanger cools.
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Application publication date: 20180306 |