CN108913252A - A kind of note hydrocarbon dewaxing device and technique taking off hydrocarbon suitable for content of wax gas dehydration - Google Patents
A kind of note hydrocarbon dewaxing device and technique taking off hydrocarbon suitable for content of wax gas dehydration Download PDFInfo
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- CN108913252A CN108913252A CN201811071467.XA CN201811071467A CN108913252A CN 108913252 A CN108913252 A CN 108913252A CN 201811071467 A CN201811071467 A CN 201811071467A CN 108913252 A CN108913252 A CN 108913252A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
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Abstract
The invention discloses a kind of note hydrocarbon dewaxing devices and technique that hydrocarbon is taken off suitable for content of wax gas dehydration, and device includes sequentially connected unstripped gas forecooler, feed gas separator, unstripped gas aftercooler, refrigeration facility, cold catch pot, heater and three phase separator.The positive effect of the present invention is：Sufficiently combine gas dehydration hydrocarbon removal process, low temperature alcohol hydrocarbon liquid is heated into isolated hydrocarbon liquid and is injected into unstripped gas forecooler imported raw material gas pipeline, outside is injected into unstripped gas aftercooler inlet line come the lighter hydrocarbons of the not content of wax, change natural gas using hydrocarbon liquid and lighter hydrocarbons to form, through most of paraffin in unstripped gas pre-cooling separation removal unstripped gas, then through unstripped gas cryogenic refrigeration separation removal part paraffin.Since hydrocarbon liquid and lighter hydrocarbons dissolve the paraffin being precipitated in natural gas temperature-fall period, blocking of the gluey or solid paraffin to equipment and valve can be effectively avoided.Operation of the present invention is flexible, can satisfy the dewaxing needs of different content of wax gas field gas dehydration hydrocarbon removal process.
Description
Technical field
Feed change in the hydrocarbon liquid injection unstripped gas that content of wax lighter hydrocarbons and cryogenic separation do not obtain is utilized the present invention relates to a kind of
Natural gas composition is to prevent gas dehydration from taking off the note hydrocarbon dewaxing device and technique of precipitation wax in hydrocarbon temperature-fall period.
Background technique
With a large amount of exploitations of global natural gas resource, natural gas as clean energy resource industry with it is civilian in using getting over
Come more extensive, more and more important in the effect of energy field, content of wax gas dehydration hydrocarbon removal process has become natural gas processing
With an important component of processing.
In the natural gas processing of gas condensate field, generallys use cryogenic separation treatment process and carries out the de- hydrocarbon of gas dehydration,
Technological principle is mainly the difference for utilizing each component dew-point temperature in natural gas, and low temperature point is carried out after cooling down by refrigerating plant
From to obtain the product gas for meeting hydrocarbon water dew point requirement.Frozen block problem is always a key of cryogenic separation treatment process
The reason of point and difficult point, frozen block, essentially consists in hydrate and generates and wax component two kinds of factors of precipitation.Wherein blocked up caused by hydrate
Plug can reduce hydrate-formation temperature using hydrate inhibitor such as methanol, ethylene glycol is added, and avoid the generation of hydrate.
The paraffin component contained in natural gas is easy to be precipitated in being dehydrated de- hydrocarbon temperature-fall period becomes solid or jelly, the analysis of wax ingredient
The blocking of unstripped gas forecooler is not only resulted in out, is increased heat exchanger pressure difference, is influenced heat transfer effect, cause product gas hydrocarbon, water dew point
It is unqualified, cold catch pot inner member even can be blocked when serious, causes device to stop, seriously affects mentioning for Gas Productivity
It takes.But blocking caused by paraffin generallys use heating or heating mode halt production is washed wax and solved, and frequently stop production and wash wax,
It is neither able to satisfy normal production requirement, and increases the labor intensity of site operation personnel, while the frequent buck of device, liter
Cooling, brings a great deal of uncertainty the essential safety of device, seriously threatens production and life security.Therefore, how to have
Effect solves the problems, such as paraffin blockage, ensures and is dehydrated de- hydrocarbon equipment safety even running, it appears especially urgent and necessary.
According to current content of wax gas field development situation, there is larger area in different content of wax gas fields raw natural gas and wax component
Not.Although the wax ingredient being precipitated from natural gas is all mainly n-alkane, molecular formula CnH2n+2, wherein n=15~37, greatly
Account for about 40~60%, but the arene content in wax ingredient is widely different, fluctuation range is 6~40%.In addition, some gas fields
The natural gas quality of extraction is leaner, and the hydrocarbon liquid that unstripped gas is dehydrated de- hydrocarbon generation through cryogenic separation is considerably less, some gas field extraction
Natural gas quality is richer, and it is more that cryogenic separation is dehydrated the hydrocarbon liquid that de- hydrocarbon generates.For different content of wax gas fields what state effectively into
The dewaxing of row natural gas is a difficult point.
Summary of the invention
The shortcomings that in order to overcome the prior art, the present invention provides a kind of note hydrocarbon for taking off hydrocarbon suitable for content of wax gas dehydration is de-
Wax apparatus and technique, it is intended to which the technical disadvantages of occluding device, Neng Gouyou is precipitated in wax during overcoming content of wax gas dehydration to take off hydrocarbon
Effect solves the problems, such as paraffin blockage.
The technical scheme adopted by the invention is that：A kind of note hydrocarbon dewaxing device taking off hydrocarbon suitable for content of wax gas dehydration, packet
Include sequentially connected unstripped gas forecooler, feed gas separator, unstripped gas aftercooler, refrigeration facility, cold catch pot, heater
With three phase separator etc.；Hydrocarbon liquid atomization device is set in the raw natural gas inlet line of unstripped gas forecooler tube-side inlet,
Lighter hydrocarbons atomizer is set on the pipeline between feed gas separator and unstripped gas aftercooler tube side；The top exit of cold catch pot
It is connect with the shell side import of unstripped gas aftercooler, the shell side import of the shell-side outlet and unstripped gas forecooler of unstripped gas aftercooler connects
It connects；Mutually outlet is successively connect with hydrocarbon liquid storage tank, hydrocarbon liquid injection pump and hydrocarbon liquid atomization device one oil of the three phase separator bottom；
The hydrocarbon liquid storage tank is connect with light hydrocarbon storage tank, and the light hydrocarbon storage tank is successively connect with lighter hydrocarbons injection pump, lighter hydrocarbons atomizer.
The present invention also provides a kind of note hydrocarbon dewaxing techniques that hydrocarbon is taken off suitable for content of wax gas dehydration, include the following steps：
Step 1: raw natural gas enters unstripped gas forecooler tube side by hydrocarbon liquid atomization device, unstripped gas is entered after pre-cooling
Separator separation, the unstripped gas isolated enter unstripped gas aftercooler tube side by lighter hydrocarbons atomizer, and cold after injection unstripped gas
Cool down after ethylene glycol mixing in device through refrigeration facility, separated subsequently into cold catch pot, the natural gas after cryogenic separation according to
It is secondary natural as product to outer defeated device after the heat exchange of unstripped gas aftercooler shell side, unstripped gas forecooler shell side and unstripped gas
Gas；
It is separated Step 2: entering three phase separator after the heated device heating of low temperature alcohol hydrocarbon liquid that cold catch pot generates, point
The hydrocarbon liquid separated out enters hydrocarbon liquid storage tank, is then injected into hydrocarbon liquid atomization device after the pressurization of hydrocarbon liquid pump；
Step 3: entering light hydrocarbon storage tank from the not content of wax lighter hydrocarbons that outside is come, it is injected into after being then pressurized by light hydrocarbon pump light
In hydrocarbon atomizer.
Compared with prior art, the positive effect of the present invention is：In order to solve natural gas in low temperature separating and dehydrating hydrocarbon removal process
Blockage problem caused by middle paraffin is precipitated, the safety and steady operation of ensuring equipment, the present invention provides a kind of note hydrocarbon dewaxing technique,
Sufficiently combine gas dehydration hydrocarbon removal process, by low temperature alcohol hydrocarbon liquid heat isolated hydrocarbon liquid be injected into unstripped gas forecooler into
Outside is injected into unstripped gas aftercooler inlet line come the lighter hydrocarbons of the not content of wax, is changed using hydrocarbon liquid and lighter hydrocarbons by mouth raw material gas pipeline
Become natural gas composition, most of paraffin in separation removal unstripped gas is pre-chilled through unstripped gas, then de- through unstripped gas cryogenic refrigeration separation
Except part paraffin.Since hydrocarbon liquid and lighter hydrocarbons dissolve the paraffin being precipitated in natural gas temperature-fall period, glue can be effectively avoided
The blocking of shape or solid paraffin to equipment and valve.Operation of the present invention is flexible, can satisfy different content of wax gas fields gas dehydration
The dewaxing of hydrocarbon removal process needs, and specific manifestation is as follows：
(1) present invention changes the composition of raw natural gas by injecting hydrocarbon liquid and lighter hydrocarbons into unstripped gas, can be effective
Paraffinic components in dissolved natural gas avoid the problem of blocking in throttling refrigeration cryogenic separation due to wax deposition.
(2) the hydrocarbon liquid and two kinds of solution of lighter hydrocarbons that the present invention makes full use of cold catch pot to obtain different wax precipitation temperature and wax
Content difference is injected separately into unstripped gas pre-cooling separation front and back raw material gas pipeline, realizes second level note hydrocarbon dewaxing, can be to the maximum extent
By the wax removing in unstripped gas.
(3) the hydrocarbon liquid that cryogenic separation obtains is injected into unstripped gas forecooler front end by the present invention, in raw material gas hydrate shape
At part wax more than temperature is removed, external lighter hydrocarbons dosage can be effectively reduced, reduce production cost.
(4) present invention is good to unstripped gas makings adaptability, when waxy feeds natural gas is leaner, the hydrocarbon liquid that cryogenic separation obtains
It is less, three phase separator oil phase cavity portion Liquid level adjusting valve can be closed, while supplementing lighter hydrocarbons to hydrocarbon liquid from light hydrocarbon storage tank and storing up
Tank meets front end note hydrocarbon demand；When waxy feeds natural gas is richer, the hydrocarbon liquid that cryogenic separation obtains is more, can pass through three-phase
Extra hydrocarbon liquid is delivered to condensation oil treatment provisions by separator oil phase cavity portion Liquid level adjusting valve.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is process flow chart of the invention.
Specific embodiment
A kind of note hydrocarbon dewaxing device taking off hydrocarbon suitable for content of wax gas dehydration, as shown in Figure 1, including：Unstripped gas forecooler
1, feed gas separator 2, unstripped gas aftercooler 3, refrigeration facility 4, cold catch pot 5, heater 6, three phase separator 7, hydrocarbon liquid
Storage tank 8, hydrocarbon liquid injection pump 9, light hydrocarbon storage tank 10 and lighter hydrocarbons injection pump 11, hydrocarbon liquid atomization device 12, lighter hydrocarbons atomizer 13, unstripped gas are pre-
It is cooler shell side bypass regulator valve 14, unstripped gas aftercooler shell side bypass regulator valve 15, feed gas separator Liquid level adjusting valve 16, low
Warm separator Liquid level adjusting valve 17, three phase separator pressure-regulating valve 18, three phase separator water phase Liquid level adjusting valve 19, three-phase separate
From device oil phase liquid position regulating valve 20, hydrocarbon liquid storage tank Liquid level adjusting valve 21, hydrocarbon flow meters 22, lighter hydrocarbons flow control valve 23, lighter hydrocarbons
Flowmeter 24 etc., wherein：
The tube side import of unstripped gas forecooler 1 is connect with raw material gas pipeline, the tube side outlet of unstripped gas forecooler 1 and raw material
The import of gas separating device 2 connects, and the top exit of feed gas separator 2 is connect with the tube side import of unstripped gas aftercooler 3, raw material
The tube side outlet of gas aftercooler 3 is connect with the import of refrigeration facility 4；The outlet of refrigeration facility 4 and the import of cold catch pot 5 connect
It connects；The top exit of cold catch pot 5 is connect with the shell side import of unstripped gas aftercooler 3, the shell-side outlet of unstripped gas aftercooler 3
It is connect with the shell side import of unstripped gas forecooler 1, bypass pipe is set between the shell side import of unstripped gas aftercooler 3 and shell-side outlet
By-pass line is arranged between the shell side import of unstripped gas forecooler 1 and shell-side outlet in road.The outlet at bottom of cold catch pot 5 with
6 import of heater connection, the outlet of heater 6 are connect with 7 import of three phase separator, 7 top exit of three phase separator and flash distillation
Gas pipeline connection, the outlet of 7 bottom aqueous phase of three phase separator are connect with ethylene glycol rich solution pipeline, 7 bottom of three phase separator wherein one
Mutually outlet is connect a oil with condensation oil treatment provisions hydrocarbon liquid pipe line is removed, and mutually outlet is connect another oil with 8 import of lime set storage tank.It is solidifying
The outlet of liquid storage tank 8 pumps 9 imports with lime set and connect, and 9 outlet of lime set pump is connect with hydrocarbon liquid atomization device 12.10 import of light hydrocarbon storage tank and outer
The ngl pipeline connection that portion comes, the one outlet of light hydrocarbon storage tank 10 are connect with 11 import of light hydrocarbon pump, the outlet of light hydrocarbon pump 11 and lighter hydrocarbons
Atomizer 13 connects, another outlet of light hydrocarbon storage tank 10 is connect with 8 import of hydrocarbon liquid storage tank.In 1 tube-side inlet of unstripped gas forecooler
Raw natural gas inlet line on be arranged hydrocarbon liquid atomization device 12, between 3 tube side of feed gas separator 2 and unstripped gas aftercooler
Pipeline on lighter hydrocarbons atomizer 13 is set, regulating valve 14 is set on the shell side by-pass line of unstripped gas forecooler 1, after unstripped gas
Regulating valve 15 is set on the shell side by-pass line of cooler 3, is arranged on the content of wax lime set pipeline of 2 outlet at bottom of feed gas separator
Liquid level adjusting valve 17 is arranged, in three phase separator in Liquid level adjusting valve 16 on the alcohol hydrocarbon liquid pipe line of 5 outlet at bottom of cold catch pot
Pressure-regulating valve 18 is set on the flash distillation gas pipeline of 7 top exits, the ethylene glycol rich solution in the outlet of 7 bottom aqueous phase of three phase separator
On pipeline be arranged Liquid level adjusting valve 19,7 bottom of three phase separator oil mutually outlet hydrocarbon liquid pipe line on be arranged Liquid level adjusting valve 20,
Liquid level adjusting valve 21 and hydrocarbon flow meters 22 are set on the hydrocarbon liquid pipe line between three phase separator 7 and hydrocarbon liquid storage tank 8, are stored up in lighter hydrocarbons
Flow control valve 23 and lighter hydrocarbons flowmeter 24 are set on the ngl pipeline between tank 10 and hydrocarbon liquid storage tank 8.
It is set on the unstripped gas forecooler inlet line, unstripped gas aftercooler inlet line and unstripped gas aftercooler tube sheet
Set pipeline atomizer.
The present invention also provides a kind of note hydrocarbon dewaxing techniques that hydrocarbon is taken off suitable for content of wax gas dehydration, mainly include unstripped gas
The parts such as separation, unstripped gas cryogenic refrigeration separation, low temperature alcohol hydrocarbon liquid heating separation, the injection of hydrocarbon liquid, storage of lighter hydrocarbon and injection are pre-chilled,
Specifically comprise the following steps：
Step 1: raw natural gas enters 1 tube side of unstripped gas forecooler by hydrocarbon liquid atomization device 12, raw material is entered after pre-cooling
Gas separating device 2 separates, and the content of wax lime set isolated enters condensation oil treatment provisions, and the unstripped gas isolated passes through lighter hydrocarbons atomizer
13 enter 3 tube side of unstripped gas aftercooler, and unstripped gas is set after mixing with the ethylene glycol injected at 3 tube sheet of unstripped gas aftercooler through refrigeration
Enter cold catch pot 5 after applying 4 coolings, it is pre- that the natural gas after cryogenic separation successively passes through 3 shell side of unstripped gas aftercooler, unstripped gas
Become product natural gas to outer defeated device after 1 shell side of cooler and unstripped gas heat exchange.
Wherein：Bypass line is set in 1 shell side of unstripped gas forecooler, installation and adjustment valve 14 in bypass line is pre-chilled in unstripped gas
Temperature transmitter is installed on device tube side outlet line, the control of bypass regulator valve aperture is adjusted according to the temperature that temperature transmitter detects
Pipe temperature between unstripped gas forecooler 1 and feed gas separator 2 processed adjusts the pipe temperature to unstripped gas gas hydrate synthesis temperature
Du or more 3~5 DEG C；In 3 shell side of unstripped gas aftercooler, bypass line, installation and adjustment valve 15 in bypass line, in cold catch pot are set
Temperature transmitter is installed in inlet line, bypass regulator valve aperture control low temperature is adjusted according to the temperature that temperature transmitter detects
Separation temperature adjusts cryogenic separation temperature between -10~-20 DEG C, meets product gas hydrocarbon, water dew point requirement and equipment and do not occur
Blocking.
It is separated Step 2: the heated device 6 of low temperature alcohol hydrocarbon liquid that cold catch pot 5 generates enters three phase separator 7 after heating,
Flashed vapour makees the use of factory's fuel gas, and ethylene glycol rich solution removes ethylene glycol regenerating device, and a part of hydrocarbon liquid enters hydrocarbon liquid storage tank 8, so
It is injected into hydrocarbon liquid atomization device 12 after being pressurized by hydrocarbon liquid pump 9, a part of hydrocarbon liquid enters condensation oil treatment provisions.
Wherein：The hydrocarbon liquid that three phase separator 7 is isolated is injected into the amount in hydrocarbon liquid atomization device 12 by natural gas processing amount 100
×104m3/ d injects 50~100kg/h and calculates, and injection pressure is higher than 1~2MPa of raw gas pressure.If natural gas quality is leaner,
The hydrocarbon liquid that cryogenic separation generates is less, and part lighter hydrocarbons can be supplemented from light hydrocarbon storage tank 10 to hydrocarbon liquid storage tank 8, meet front end note hydrocarbon need
It asks；When waxy feeds natural gas is richer, the hydrocarbon liquid that cryogenic separation obtains is more, can pass through the oily phase cavity portion of three phase separator 7
Extra hydrocarbon liquid is delivered to condensation oil treatment provisions by Liquid level adjusting valve 20.
Step 3: entering light hydrocarbon storage tank 10 from the not content of wax lighter hydrocarbons that outside is come, then, can be both pressurized by light hydrocarbon pump 11
After be injected into lighter hydrocarbons atomizer 13, can also enter hydrocarbon liquid storage tank 8 through hydrocarbon liquid pump 9 pressurization after be injected into hydrocarbon liquid atomization device 12
In.
Wherein：Lighter hydrocarbons be injected into the amount in 3 tube side inlet line of unstripped gas aftercooler by natural gas processing amount 100 ×
104m3/ d injects 40~80kg/h, and injection pressure is higher than 1~2MPa of raw gas pressure, the lighter hydrocarbons of storage in light hydrocarbon storage tank 10,
Wax precipitation temperature answers < -30 DEG C.
Wherein：Flowmeter 24 and flow control valve 23 are provided on pipeline between light hydrocarbon storage tank 10 and hydrocarbon liquid storage tank 8,
The aperture of valve 23 is controlled to adjust by the lighter hydrocarbons flow detected, so that control enters hydrocarbon liquid storage tank 8 from light hydrocarbon storage tank 10
Lighter hydrocarbons flow；The liquid level of feed gas separator 2 is by the liquid level tune that is arranged on the content of wax lime set pipeline that feed gas separator 2 exports
Section valve 16 is controlled；The liquid level of cold catch pot 5 is by the liquid that is arranged on the low temperature alcohol hydrocarbon liquid pipe line that cold catch pot 5 exports
Position regulating valve 17 is controlled；The pressure flashed on gas pipeline that the pressure of three phase separator 7 is exported by three phase separator 7 is arranged in
Force regulating valve 18 is controlled；The ethylene glycol rich solution that 7 water phase liquid level of three phase separator is exported by 7 water phase of three phase separator is arranged in
Liquid level adjusting valve 19 on pipeline is controlled, what 7 oil phase liquid position of three phase separator was mutually exported by 7 oil of three phase separator is arranged in
Liquid level adjusting valve 20 on hydrocarbon liquid pipe line is controlled, the hydrocarbon liquid pipe that the liquid level of hydrocarbon liquid storage tank 8 is mutually exported by 7 oil of three phase separator
Liquid level adjusting valve 21 on line is controlled.
The working principle of the invention is：According to the principle of substance " similar to mix ", cold catch pot is made full use of to obtain
Hydrocarbon liquid and the different wax precipitation temperature and wax content difference of two kinds of solution of lighter hydrocarbons are injected separately into unstripped gas pre-cooling separation front and back unstripped gas
Pipeline is made up of feed change natural gas, realizes second level note hydrocarbon dewaxing.It is main in the hydrocarbon liquid and lighter hydrocarbons obtained due to cryogenic separation
Contain C5~C10Oil product component, and these oil product components are close with paraffinic components ingredient, and wax precipitation temperature is relatively low.It will
The hydrocarbon liquid that cryogenic separation obtains is injected into the preceding unstripped gas of pre-cooling, and the most of paraffin contained in unstripped gas is separated in unstripped gas
Level-one separation is carried out in device；The lower lighter hydrocarbons of wax precipitation temperature are injected into before cryogenic refrigeration in unstripped gas, will be contained in unstripped gas
Part paraffin the second-order separation is carried out in cold catch pot；Make the paraffinic components in natural gas in being dehydrated de- hydrocarbon temperature-fall period
Always exist in liquid form, can effectively avoid the problem that paraffin there are occluding device and valve, the safety of ensuring equipment
Even running.Lighter hydrocarbons employed in the present invention, wax precipitation temperature is very low, and molten wax effect is good, usually need to be from external roping or pipe
Road is delivered to treatment plant, will be dehydrated the hydrocarbon liquid that cryogenic separation obtains in hydrocarbon removal process and is injected into unstripped gas pre-cooling separation front end, has
Conducive to lighter hydrocarbons dosage is reduced, operating cost is reduced.
Claims (10)
1. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration, it is characterised in that：Including sequentially connected raw material
Gas forecooler, feed gas separator, unstripped gas aftercooler, refrigeration facility, cold catch pot, heater and three phase separator；?
Hydrocarbon liquid atomization device is set in the raw natural gas inlet line of unstripped gas forecooler tube-side inlet, in feed gas separator and raw material
Lighter hydrocarbons atomizer is set on the pipeline between gas aftercooler tube side；The top exit of cold catch pot and the shell of unstripped gas aftercooler
Journey import connection, the shell-side outlet of unstripped gas aftercooler are connect with the shell side import of unstripped gas forecooler；The three phase separator
Mutually outlet is successively connect with hydrocarbon liquid storage tank, hydrocarbon liquid injection pump and hydrocarbon liquid atomization device one oil of bottom；The hydrocarbon liquid storage tank and light
The connection of hydrocarbon storage tank, the light hydrocarbon storage tank are successively connect with lighter hydrocarbons injection pump, lighter hydrocarbons atomizer.
2. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 1, it is characterised in that：
Bypass line is set in the unstripped gas forecooler shell side, the installation and adjustment valve in bypass line is exported in unstripped gas forecooler tube side
Temperature transmitter is installed on pipeline；The unstripped gas aftercooler shell side be arranged bypass line, the installation and adjustment valve in bypass line,
Temperature transmitter is installed in cold catch pot inlet line.
3. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 1, it is characterised in that：
Liquid level adjusting valve is set on the content of wax lime set pipeline of feed gas separator outlet at bottom；In the alcohol of cold catch pot outlet at bottom
Liquid level adjusting valve is set on hydrocarbon liquid pipe line.
4. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 1, it is characterised in that：
Pressure-regulating valve is set on the flash distillation gas pipeline of three phase separator top exit, the second in the outlet of three phase separator bottom aqueous phase
Liquid level adjusting valve is set on glycol rich solution pipeline, setting liquid level is adjusted on three phase separator bottom oil mutually the hydrocarbon liquid pipe line of outlet
Valve.
5. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 1, it is characterised in that：
Liquid level adjusting valve and hydrocarbon flow meters are set on the hydrocarbon liquid pipe line between three phase separator and hydrocarbon liquid storage tank.
6. a kind of note hydrocarbon dewaxing device for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 1, it is characterised in that：
Flow control valve and lighter hydrocarbons flowmeter are set on the ngl pipeline between light hydrocarbon storage tank and hydrocarbon liquid storage tank.
7. a kind of note hydrocarbon dewaxing technique for taking off hydrocarbon suitable for content of wax gas dehydration, it is characterised in that：Include the following steps：
Step 1: raw natural gas enters unstripped gas forecooler tube side by hydrocarbon liquid atomization device, unstripped gas is entered after pre-cooling and is separated
Device separation, the unstripped gas isolated enter unstripped gas aftercooler tube side by lighter hydrocarbons atomizer, in injection unstripped gas aftercooler
Ethylene glycol mixing after cool down through refrigeration facility, separated subsequently into cold catch pot, the natural gas after cryogenic separation successively passes through
It crosses after unstripped gas aftercooler shell side, unstripped gas forecooler shell side and unstripped gas heat exchange to outer defeated device as product natural gas；
It separates, isolates Step 2: entering three phase separator after the heated device heating of low temperature alcohol hydrocarbon liquid that cold catch pot generates
Hydrocarbon liquid enter hydrocarbon liquid storage tank, then through hydrocarbon liquid pump pressurization after be injected into hydrocarbon liquid atomization device；
Step 3: entering light hydrocarbon storage tank from the not content of wax lighter hydrocarbons that outside is come, lighter hydrocarbons mist is injected into after being then pressurized by light hydrocarbon pump
Change in device.
8. a kind of note hydrocarbon dewaxing technique for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 7, it is characterised in that：
In unstripped gas forecooler shell side, bypass line, installation and adjustment valve in bypass line, by unstripped gas forecooler and feed gas separator are set
Between pipe temperature control 3~5 DEG C more than unstripped gas hydrate-formation temperature；It is arranged in unstripped gas aftercooler shell side and bypasses
Line, installation and adjustment valve in bypass line, cryogenic separation temperature is adjusted between -10~-20 DEG C.
9. a kind of note hydrocarbon dewaxing technique for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 7, it is characterised in that：
The hydrocarbon liquid that three phase separator is isolated is injected into the amount in hydrocarbon liquid atomization device by natural gas processing amount 100 × 104m3/ d injection 50~
100kg/h is calculated, and injection pressure is higher than 1~2MPa of raw gas pressure；When the hydrocarbon liquid that cryogenic separation generates is less, stored up from lighter hydrocarbons
Tank supplements part lighter hydrocarbons to hydrocarbon liquid storage tank, meets front end note hydrocarbon demand；When the hydrocarbon liquid that cryogenic separation obtains is more, extra hydrocarbon
Liquid is delivered to condensation oil treatment provisions.
10. a kind of note hydrocarbon dewaxing technique for taking off hydrocarbon suitable for content of wax gas dehydration according to claim 9, feature exist
In：Lighter hydrocarbons are injected into the amount in unstripped gas aftercooler tube side inlet line by natural gas processing amount 100 × 104m3/ d injection 40~
80kg/h, injection pressure are higher than 1~2MPa of raw gas pressure；The lighter hydrocarbons stored in light hydrocarbon storage tank, < -30 DEG C of wax precipitation temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071467.XA CN108913252B (en) | 2018-09-14 | 2018-09-14 | Hydrocarbon injection dewaxing device and process suitable for dehydrating and dealkylating wax-containing natural gas |
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| CN201811071467.XA CN108913252B (en) | 2018-09-14 | 2018-09-14 | Hydrocarbon injection dewaxing device and process suitable for dehydrating and dealkylating wax-containing natural gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302897A (en) * | 2020-03-23 | 2020-06-19 | 西南石油大学 | Energy-saving and simple methanol regeneration and recovery process device and method |
| CN111456702A (en) * | 2019-01-18 | 2020-07-28 | 中国石油天然气股份有限公司 | Oil-gas separation system and method |
| CN111732982A (en) * | 2020-06-10 | 2020-10-02 | 中国石油天然气集团有限公司 | Natural gas dewaxing method and device |
| CN113388426A (en) * | 2020-03-12 | 2021-09-14 | 中国石油天然气股份有限公司 | Dewaxing agent and natural gas dewaxing treatment method |
| CN114963012A (en) * | 2021-02-26 | 2022-08-30 | 中国石油天然气股份有限公司 | Gas processing system |
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| CN113388426B (en) * | 2020-03-12 | 2022-08-05 | 中国石油天然气股份有限公司 | Dewaxing agent and natural gas dewaxing treatment method |
| CN111302897A (en) * | 2020-03-23 | 2020-06-19 | 西南石油大学 | Energy-saving and simple methanol regeneration and recovery process device and method |
| CN111732982A (en) * | 2020-06-10 | 2020-10-02 | 中国石油天然气集团有限公司 | Natural gas dewaxing method and device |
| CN111732982B (en) * | 2020-06-10 | 2021-08-13 | 中国石油天然气集团有限公司 | Natural gas dewaxing method and device |
| CN114963012A (en) * | 2021-02-26 | 2022-08-30 | 中国石油天然气股份有限公司 | Gas processing system |
| CN114963012B (en) * | 2021-02-26 | 2024-04-30 | 中国石油天然气股份有限公司 | Gas treatment system |
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