CN109868154A - A method of it reducing delayed coking unit emptying tower heavy oil and carries - Google Patents
A method of it reducing delayed coking unit emptying tower heavy oil and carries Download PDFInfo
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- CN109868154A CN109868154A CN201910270974.4A CN201910270974A CN109868154A CN 109868154 A CN109868154 A CN 109868154A CN 201910270974 A CN201910270974 A CN 201910270974A CN 109868154 A CN109868154 A CN 109868154A
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Abstract
The invention discloses a kind of method that reduction delayed coking unit emptying tower heavy oil carries, coke drum steams out the emptying stage, by injecting cooling medium, cooling emptying gas into emptying gas；By adjusting the injection rate of cooling medium, control enters the temperature of emptying tower oil gas；Setting emptying tower bottom oil heater, emptying one tower bottom heavy dirty oil of tower bottom pump discharge return to emptying tower suction line to after being vented the heating of tower bottom oil heater, pass through the flow of heat medium, temperature of the control into emptying tower liquid phase；Pressure-control valve is set on emptying tower top liquid separation tank fixed gas outlet conduit, adjusts coke drum and steams out when being vented, be vented the pressure of tower top；Heat exchanger plates are combined using heavy dirty oil distributor and umbellate form+inclination circular ring type in emptying tower.The present invention can be effectively reduced by suites of measure into the heavy oil fraction put in superficial gas, reduce the gas velocity in emptying tower, the washing absorption effect in emptying tower to heavy oil in gas phase is improved, the heavy oil for reducing emptying top gaseous phase carries, and improves the oil-water separation of emptying tower top liquid separation tank.
Description
Technical field
The present invention relates to the Delayed Coking Technology in petroleum refining field, specially a kind of reduction delayed coking unit emptying
The method that tower heavy oil carries.
Background technique
Delay coking process is a kind of important inferior heavy oil processing technology, as a kind of continuous production, intermittent operation
Technique, generally at least there are two coke drum, when a coke drum is in online green coke, another coke drum is devoked
Relevant operation, two coke drums alternately green coke and de-coking operations.The coke drum devoked need to steam out, blow greatly through too small
Vapour, it is burnt to water cooling, discharge water, open top of coke tower bottom cover, hydraulic coke-cutting, close top of coke tower bottom cover, steam catches up with air, steam examination
Pressure, oil gas preheating, feed switched.The emptying tower of delayed coking unit mainly handles the arrogant step that steams out and starts, until giving
Isolating valve, closing and breather valve opening steps are vented when water cooling coke terminates the gas for devoking coke drum tower top discharge in the process, discharge
Gas in mainly contain device in Gas, light sump oil, heavy dirty oil and steam.
The steam out process flow of the process that is vented of existing delayed coking unit is illustrated in conjunction with attached drawing 1 as follows.
Delayed coking unit green coke coke drum A is in the green coke stage, and four-way valve K is directed toward green coke coke drum A, the side coke drum A
Charging isolating valve, L1 is opened, oily main valve M1 closing is got rid of in the side coke drum A, coke drum A side bottom steams out valve N1 closing, the side coke drum A
Bottom water-supply valve O1 is closed；The big oil gas isolating valve, P1 in the side coke drum A is opened, the side-blown vapour emptying isolating valve, R1 of coke drum A is closed.Come
Enter in green coke coke drum A from the coking oil 1 of coking heater through four-way valve K, a series of cracking, condensation occur in coke drum
Reaction, the coke for reacting generation stay in coke drum, and the coking oil gas 2 for reacting production is flowed out by top of coke tower, cold through quench oil
But different fractions are isolated by main oil gas piping to coker fractionation system afterwards.
Coke drum B is devoked in when steaming out greatly and to the water cooling coke stage, the side coke drum B feeds isolating valve, L2 closing, coke
Tower B gets rid of side oily main valve M2 opening, the big oil gas isolating valve, P2 in the side coke drum B is closed, the side-blown vapour emptying isolating valve, R2 of coke drum B is beaten
It opens.When devoke coke drum B carry out greatly steam out operate when, coke drum B side bottom steam out valve N2 open, coke drum B side bottom water supply
Valve O2 is closed；When devoke coke drum B carry out water supply cooling down operation when, coke drum B side bottom steam out valve N2 close, the side coke drum B
Bottom water-supply valve O2 is opened.
Decoking coke drum B is steaming out, in water supply process greatly, and the high temperature (150~420 DEG C) of generation is by a large amount of steam and on a small quantity
The emptying gas 3 of oil gas composition enters to be vented the lower part tower C by decoking coke drum B jacking, is equipped with heat exchanger plates in emptying tower C, drops a hint
Body carries out contact heat-exchanging in the heavy dirty oil 6 that Ta Nei and tower top enter, and the heavy oil fraction in oil gas, which is condensed, to be absorbed and fall on emptying
Tower bottom, the heavy dirty oil 6 for being vented tower bottom are extracted out by emptying column bottoms pump G, and after the warp let-off is vented tower bottom cooler F cooling, a part is in weight
Tower is returned under sump oil reflux control valve J3 control and makees cooling absorption oil, and another part heavy dirty oil is in emptying tower bottom fluid level control valve J4
Control lower carrying device.The emptying tower overhead gas 7 of tower top discharge being made of steam and oil gas is vented again to emptying tower top cooler E
After being cooled to about 60 DEG C, emptying tower top liquid separation tank D is entered back into, sewage 8, light sump oil 9 and fixed gas 10 are isolated.Fixed gas 10 into
Enter flare discharge system, sewage 8 is sent through sewage pump H to acidic water stripping device, and light sump oil 9 is through sump (waste oil) pump I carrying device.
The problem of generally existing emptying tower heavy oil of delayed coking unit carries both at home and abroad at present, emptying tower heavy oil carrying refer to
The heavy oil of tower bottom is vented after cooling to tower top and high temp oil gas contact heat-exchanging and when absorbing heavy oil, emptying tower is carried to by gas
Top.The main harm that heavy oil carries has: (1) heavy oil enters tower top air cooler or water cooler by emptying tower top, and heavy oil can restrain
Inner wall unevenly solidifies, and reduces heat transfer coefficient, or even blocking tube bank, leads to temperature after air cooler bias current, pressure drop increase, gas cooling
It spends high.(2) oil gas cooling temperature is higher, and the high-temperature oil gas containing a large amount of steam goes flare system, is influencing flare system just
Often operation.(3) heavy oil fraction density and water are close, and being vented in tower overhead gas can cause to be vented in tower top liquid separation tank containing heavy oil fraction
Oil-water emulsion it is serious, sewage and sump oil can not efficiently separate, and sewage with oil rate is high, are not achieved and send acidic water stripping device outside
It is required that；Sump oil moisture content is high, freshening difficulty etc..(4) emptying bottom of tower heavy oil is carried to tower top, reduces in tower to lower reflux
Cooling oil mass, reduces the contact cooling effect in emptying tower, and emptying tower bottom liquid level decline easily leads to tower bottom pump depletion.In short,
The heavy oil carrying problem of emptying tower can seriously affect safe, the steady and long-term operation of blowdown system even coking plant.
Summary of the invention
The present invention provides a kind of method that reduction delayed coking unit emptying tower heavy oil carries, the method can be effectively reduced
The heavy oil being vented in tower carries, and improves delayed coking unit and steams out the operation of emptying and cold burnt system, extends the device cycle of operation,
Improve the safety in operation of device.
A kind of method for reducing delayed coking unit emptying tower heavy oil and carrying provided by the invention, by following technical solution
It realizes:
(1) coke drum outlet emptying gas pipeline on setting water filling atomizer, when coke drum be in greatly steam out and to
When the water cooling coke stage, atomized water is injected into emptying gas pipeline by filling the water atomizer, utilizes the heat of gasification cooling pipe of water
Interior high temperature emptying gas, realizes the cooling of emptying gas and the condensation of heavy dirty oil.
(2) the water filling atomizer is made of atomizer, adapter tube, flange and support frame, the installation position set of atomizer
In on the emptying gas general pipeline of top of coke tower to emptying tower, and as far as possible far from emptying tower entry position, the spray head of atomizer is located at
The shaft core position of emptying gas pipeline, injection direction are consistent with emptying gas flow direction.
(3) the emptying gas conduit upper setting in atomizer downstream measures temperature thermo-coupler on emptying gas flow direction,
Distance of the position of thermocouple in at least 10 times emptying gas pipe diameters in atomizer installation site downstream.Temperature thermo-coupler is surveyed
Measure gas phase temperature in emptying gas pipeline.Water injection flow controlling valves are set, gas in emptying gas pipeline is controlled by injection flow
Phase temperature is 150-250 DEG C.The sewage that water filling selects emptying tower top liquid separation tank to isolate first, can also be used in oil plant can mention
Other sewage supplied or water purification.
(4) setting heavy dirty oil distributor and umbellate form+inclination circular ring type combine heat exchanger plates inside emptying tower, and heavy dirty oil passes through weight
Sump oil distributor sprays downwards, carries out cooling and washing absorption to emptying gas by combination heat exchanger plates.Umbellate form+inclination circular ring type
Combination heat exchanger plates should have enough intensity and heat transfer effect.
(5) emptying tower top knockout drum non-condensable gas pipeline on pressure-control valve is set, steamed out greatly according to coke drum and
Steaming out greatly and cold burnt confluent when the stage burnt to water cooling, adjusts the pressure of emptying tower top knockout drum, steams out greatly and cold coke
When feedwater flow is larger and top of coke tower gas outlet temperature is higher, elevated pressures are controlled；Conversely, steaming out greatly with cold coke to water flow
When the smaller and top of coke tower gas outlet temperature of amount is lower, lower pressure is controlled.
(6) to avoid emptying tower bottom oil band water that water bumping is caused to rush tower or tower bottom pump depletion, setting is vented tower bottom oil circulation
Heater, emptying tower bottom oil is gone out by pumping after heated medium heating, returns to emptying tower entrance under the control of flow control valve
Pipeline, then it flow to emptying tower certainly.Liquid phase thermocouple is set in emptying tower inlet duct lower part, for measuring into emptying tower logistics liquid
The temperature of phase controls heating medium flow by liquidus temperature.
The present invention is a kind of method that reduction delayed coking unit is vented the carrying of tower heavy oil:
When Coking Tower for Delayed Coking Unit steam out emptying manipulation, coke drum steams out greatly and the cold burnt a large amount of high temperature of generation
(250~420 DEG C) are flowed out by oil gas and the emptying gas of vapour composition from top of coke tower.The sewage in overhead drum is vented by dirt
Water pump extraction, is sent to the above-mentioned water filling atomizer being installed on emptying gas pipeline, sewage is in emptying gas pipeline after pressurization
It is inside atomized and sufficiently exchanges heat with emptying gas, emptying gas is cooled.By automatically adjusting the flow of sewage, control into emptying
The temperature of tower gas is at 150-250 DEG C, to reduce the empty tower gas velocity of emptying tower.
The heavy dirty oil of emptying tower bottom is extracted out by emptying column bottoms pump, a part conduct under heavy dirty oil reflux control valve control
It absorbs washing oil and returns tower；After a part to the heated medium heating of emptying tower bottom oil heater, emptying tower suction line is returned, then
From emptying tower is flow to, it is 150-250 DEG C by adjusting heating medium flow control emptying tower entrance logistics liquidus temperature, avoids putting
Void tower bottom sump oil band water；Another part is after emptying tower bottom cooler is cooling, in emptying tower bottom liquid level and heavy dirty oil flow tandem
Control lower carrying device.
It is allocated as the heavy dirty oil for absorbing washing oil by heavy dirty oil distributor, then passes through umbellate form+inclination in tower
Circular ring type combines heat exchanger plates sub-distribution, contact and absorption washing again, reduces the heavy oil content of emptying top gaseous phase.
Pressure control on emptying tower top knockout drum non-condensable gas pipeline is to steam out and give water cooling coke greatly according to coke drum
Steaming out greatly when the stage is adjusted with cold burnt confluent, and steam out greatly and top of coke tower gas outlet temperature larger with cold burnt feedwater flow
When higher, control pressure is 0.15-0.2MPag；Steam out greatly and top of coke tower gas outlet temperature smaller with cold burnt feedwater flow
When lower, control pressure is 0.05-0.15MPag.
A kind of method for reducing delayed coking unit emptying tower heavy oil and carrying of the present invention, the high temperature from coke drum
Emptying gas and the sewage of atomization sufficiently exchange heat, and the temperature of the emptying gas into emptying tower are reduced, first is that in emptying gas
Gas phase heavy oil fraction liquid phase is condensed into due to the reduction of temperature, gas-liquid two-phase is tentatively divided by emptying gas pipeline
From, into emptying tower logistics in liquid phase heavy oil fraction fall directly into tower bottom, into emptying tower logistics gas phase in heavy oil fraction
It is greatly reduced；Second is that gas density increases at the same pressure due to the reduction of temperature, volume flow is reduced, and reduces void tower
Gas velocity reduces heavy oil carrying.
It is vented in tower and heavy dirty oil distributor is set, distribute heavy dirty oil more evenly within the scope of tower section；Cooperation umbellate form+incline
Oblique circular ring type combines heat exchanger plates, is vented gas and liquid two phases in tower and repeatedly reallocates, contacts absorption, strengthens heavy dirty oil to gas phase in tower
Washing effect, with reduce heavy oil carrying.
Existing delayed coking unit steams out emptying process, and the fixed gas of emptying tower top liquid separation tank is immediately discharged to without voltage-controlled
Flare system is vented the pressure about 0.05MPag of tower top liquid separation tank.The present invention by steam out greatly it is larger with cold burnt feedwater flow
And top of coke tower gas outlet temperature it is higher when, improve emptying tower top liquid separation tank pressure arrive 0.15-0.2MPag, improve be vented
Pressure tower to be vented density of gas phase in tower and increases, and empty tower gas velocity reduces about 50%, is conducive to sedimentation and the washing absorption of heavy oil,
The heavy oil for being also beneficial to reduce oil gas carries.
By be vented tower bottom heater heat one emptying tower bottom oil, to maintain emptying tower bottom oil temperature, avoid because
So that steam local overcooling is become water droplet as washing oil for cold emptying tower bottom oil and falls into tower bottom, when tower bottom oil is rapidly heated,
Cause water bumping to rush tower, heavy oil fraction made largely to be carried to emptying overhead system, leads to overhead system blocking and tower bottom pump depletion,
Device is influenced to operate normally.
This method achievees the purpose that reducing emptying tower heavy oil carries by the above comprehensive means.
Detailed description of the invention
Attached drawing 1: existing delayed coking unit, which steams out, is vented stage process flow diagram
Attached drawing 2: the flow diagram for the method that a kind of reduction delayed coking assembling device emptying tower heavy oil of the invention carries
Description of symbols:
Equipment: A, green coke coke drum B, decoking coke drum C, emptying tower D, emptying tower top liquid separation tank
E, tower top cooler F, emptying tower bottom cooler G, emptying column bottoms pump H, sewage pump are vented
I, sump (waste oil) pump J1, gas phase thermocouple J2, emptying tower entrance gas phase temperature-discharge of sewage control valve J3, weight are dirty
Oil reflux control valve J4, emptying tower bottom liquid level-heavy dirty oil go out device amount flow control valve J5, to steam flow control valve J6,
Feed water brake J7, emptying overhead drum voltage-controlled valve J8, liquid phase thermocouple J9, liquidus temperature-heat medium control valve
J10, circulation oil flow control valve K, four-way valve L1, the side coke drum A charging isolating valve, L2, the side coke drum B feed isolating valve,
M1, the side coke drum A get rid of oily main valve M2, oily main valve N1 is got rid of in the side coke drum B, coke drum A side bottom steams out valve N2, the side coke drum B
Bottom steam out valve O1, coke drum A side bottom water-supply valve O2, coke drum B side bottom water-supply valve P1, the big oil gas in the side coke drum A every
The side-blown vapour emptying isolating valve, R2 of disconnected valve P2, the big oil gas isolating valve, R1 in the side coke drum B, coke drum A, the side-blown vapour emptying of coke drum B
Isolating valve, S, water filling atomizer T, emptying tower bottom heater
Logistics: 1, coking oil 2, coking oil gas 3, emptying gas 4, steam 5, coke cooling water 6, heavy dirty oil 7, emptying tower
Top gas 8, sewage 9, light sump oil 10, fixed gas 11, heat medium
Specific embodiment
The method that a kind of 2 pairs of reduction delayed coking assembling devices emptying tower heavy oil of the invention carry with reference to the accompanying drawing make into
One step detailed description:
It is as shown in Figure 2: the setting water filling atomizer S on the emptying gas pipeline of coke drum outlet, when coke drum is in big
It steams out and when the stage burnt to water cooling, injects atomized water 8 into 3 pipeline of emptying gas by filling the water atomizer S, utilize the gasification of water
High temp oil gas in hot cooling pipe realizes the cooling of gas and the condensation of heavy dirty oil.
The water filling atomizer S is made of atomizer, adapter tube, flange and support frame, and the installation site of atomizer S is located at
On top of coke tower to 3 general pipeline of emptying gas of emptying tower C, and as far as possible far from the emptying entry position tower C, the spray head position of atomizer S
In the shaft core position of emptying gas pipeline, injection direction is consistent with emptying gas flow direction.
3 conduit upper of the emptying gas setting measurement temperature thermo-coupler in the downstream atomizer S on 3 flow direction of emptying gas
J1, distance of the thermocouple J1 installation site in the water filling at least 10 times emptying gas pipe diameters in atomizer S installation site downstream.Temperature
Spend gas phase temperature in thermocouple J1 measurement 3 pipeline of emptying gas.Water injection flow controlling valves J2 is set, is put by injection flow control
Gas phase temperature is 200 DEG C in air body pipeline.The sewage that water filling selects emptying tower top liquid separation tank to isolate first, can also be used refining
Other available sewage or water purification in oily factory.
It is vented setting heavy dirty oil distributor and umbellate form+inclination circular ring type inside tower C and combines heat exchanger plates, heavy dirty oil is dirty by weight
Oil dispenser sprays downwards, carries out cooling and washing absorption to emptying gas by combination heat exchanger plates.Umbellate form+inclination circular ring type group
Enough intensity and heat transfer effect should be had by closing heat exchanger plates.
Emptying tower top knockout drum D non-condensable gas pipeline on be arranged pressure-control valve J7, steamed out greatly according to coke drum and
Steaming out greatly and cold burnt confluent when the stage burnt to water cooling, adjusts the pressure of emptying tower top knockout drum D, steams out greatly and cold coke
When feedwater flow is larger and top of coke tower gas outlet temperature is higher, elevated pressures 0.15-0.2MPag is controlled；Conversely, steaming out greatly
It is smaller with cold burnt feedwater flow and when top of coke tower gas outlet temperature is lower, control lower pressure 0.05-0.15MPag.
To avoid emptying tower bottom oil 7 from causing water bumping to rush tower or column bottoms pump G evacuation with water, setting emptying tower bottom oil circulation adds
Hot device T, emptying tower bottom oil 7 is gone out by pumping after the heated heating of medium 11, returns to emptying tower under the control of flow control valve J10
Suction line, then it flow to emptying tower certainly.Liquid phase thermocouple J8 is set in emptying tower inlet duct lower part, for measuring into emptying tower
The temperature of logistics liquid phase controls heating medium flow by liquidus temperature.
Green coke coke drum A is in the green coke stage, and four-way valve K is directed toward green coke coke drum A, and the side coke drum A feeds isolating valve, L1
It opens；Coke drum A gets rid of side oily main valve M1 and closes；Coke drum A side bottom steam out valve N1 closing；Coke drum A side bottom water-supply valve O1
It closes；The big oil gas isolating valve, P1 in the side coke drum A is opened；The side-blown vapour emptying isolating valve, R1 of coke drum A is closed.From coking heater
Coking oil 1 enter in green coke coke drum A through four-way valve K, occur a series of cracking, condensation reaction in coke drum, reaction life
At coke stay in coke drum, the coking oil gas 2 for reacting production is flowed out by top of coke tower, to fractionation train after chilling oil quenching
System isolates different fractions.
Decoking coke drum B green coke, which is in, to steam out when being vented the stage, and the side coke drum B feeds isolating valve, L2 and closes；The side coke drum B
Oily main valve M2 is got rid of to open；The big oil gas isolating valve, P2 in the side coke drum B is closed；The side-blown vapour emptying isolating valve, R2 of coke drum B is opened.When removing
When burnt coke drum B carries out big blowing operation: coke drum B side bottom steams out valve N2 opening；Coke drum A side bottom water-supply valve O2 is closed
It closes；When devoke coke drum B carry out water supply cooling down operation when: coke drum B side bottom steam out valve N2 close；Coke drum B side bottom is given
Water valve O2 is opened.
Decoking coke drum B steams out greatly with cold burnt a large amount of high temperature (250~420 DEG C) emptying gas 3 generated from top of coke tower
Outflow.Sewage 8 is injected into emptying gas 3 by filling the water atomizer S, cooling emptying gas 3.By being vented tower entrance gas phase temperature
Degree-discharge of sewage control valve J2 adjusts 8 flow of sewage, and controlling into the temperature for being vented tower oil gas is 200 DEG C.In emptying gas 3
Gas phase heavy oil fraction is cooled to liquid phase, and gas and liquid two phases are separated by being vented tower C suction line, into after emptying tower 3,
Liquid phase heavy oil fraction falls directly into tower bottom, so that the heavy oil fraction in emptying tower in gas phase is greatly reduced；The gas phase being vented in tower C
Heavy oil fraction therein is further washed through heavy dirty oil 6.
The heavy dirty oil 6 for being vented tower bottom is extracted out by emptying column bottoms pump G, and a part is under heavy dirty oil reflux control valve J3 control
Tower is returned as washing oil；After a part is heated to the heated medium 11 of emptying tower bottom oil heater T, emptying tower inlet tube is returned
Line, then from emptying tower C is flow to, 200 DEG C are heated to by heavy dirty oil by liquidus temperature-heat medium control valve control；It is another
Part is after emptying tower bottom cooler F is cooling, in the case where emptying tower bottom liquid level-heavy dirty oil goes out device amount flow control valve J4 control
Device out.
The emptying tower overhead gas 7 of emptying tower top discharge being made of steam and oil gas is cooled to emptying tower top cooler E again
About 60 DEG C, emptying tower top liquid separation tank D is entered back into, sewage 8, light sump oil 9 and fixed gas 10 are isolated.It is voltage-controlled by emptying overhead drum
The pressure of valve J7 control emptying overhead drum is 0.18MPag, and fixed gas 10 is through voltage-controlled heel row to torch bleed-off system.Light sump oil 9 passes through
Sump (waste oil) pump I carrying device.Sewage 8 is sent through sewage pump H a part to coke cooling water pond or acidic water stripping device, another part send to
Water filling atomizer S on emptying gas line, control emptying tower entrance logistics gas phase temperature.
Embodiment
1,000,000 tons/year of certain domestic refinery delayed coking unit emptying tower causes to be vented there are serious heavy oil carrying problem
The air-cooled wax deposition of tower top, emptying tower top cooling capacity is insufficient, and the fixed gas of emptying tower top liquid separation tank deck can not be emitted into torch, seriously
The normal production of delayed coking unit is affected, so that device is forced to stop work once to air cooler coke cleaning every half a year.The refinery
Using it is of the present invention it is a kind of reduce delayed coking assembling device emptying tower heavy oil carry method transformation after, be vented the heavy oil of tower
The problem of carrying, is effectively solved, emptying tower top air cooler coke cleaning frequency by half a year/time, be reduced to 3 years per operation cycles/
Secondary, emptying tower top cooling capacity can be played effectively, and emptying tower top liquid separation tank oil-water emulsion phenomenon is effectively relieved, and ensure dress
Set long period safety, even running.
Claims (7)
1. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying, it is characterised in that: steam out greatly when coke drum is in
When with the stage burnt to water cooling, by being filled the water into emptying gas pipeline, using the high temp oil gas in the heat of gasification cooling pipe of water,
Realize the cooling of gas and the condensation of heavy dirty oil, by adjusting the injection rate of water, control enters the temperature of emptying tower oil gas；Setting
It is vented tower bottom oil heater, after emptying one tower bottom heavy dirty oil of tower bottom pump discharge is heated to emptying tower bottom oil heater, return is put
Void tower suction line；Pressure-control valve is set on emptying tower top liquid separation tank outlet non-condensable gas pipeline, adjusting coke drum, which steams out, to be put
The pressure of tower top is vented when empty.
2. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
It steams out greatly when coke drum is in and when the stage burnt to water cooling, water filling, water is injected into emptying gas pipeline by water filling atomizer
It is injected into emptying gas after being atomized by atomizer.
3. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
Control enters the temperature of emptying tower oil gas at 150 DEG C~250 DEG C.
4. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
Emptying tower top pressure is adjusted in 0.15~0.20MPag.
5. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
By adjusting the flow of heat medium, control enters emptying tower logistics liquidus temperature at 150 DEG C~250 DEG C.
6. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
Heavy dirty oil distributor is set inside the emptying tower, and heavy dirty oil is sprayed downwards by heavy dirty oil distributor, washs emptying gas；
Being vented heat exchanger plates in tower uses umbellate form+inclination circular ring type to combine heat exchanger plates.
7. a kind of method for reducing delayed coking unit emptying tower heavy oil and carrying according to claim 1, it is characterised in that:
The water-bearing medias such as demineralized water, deaerated water, fresh water, sour water, oily wastewater, aqueous sump oil can be used in the water filling.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112521969A (en) * | 2020-12-28 | 2021-03-19 | 大连福佳·大化石油化工有限公司 | Oil gas recovery system of cooking equipment |
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