CN109486505A - The device and method of separating heavy from ethane cracking product - Google Patents
The device and method of separating heavy from ethane cracking product Download PDFInfo
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- CN109486505A CN109486505A CN201710822896.5A CN201710822896A CN109486505A CN 109486505 A CN109486505 A CN 109486505A CN 201710822896 A CN201710822896 A CN 201710822896A CN 109486505 A CN109486505 A CN 109486505A
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- water
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- gun barrel
- heavy oil
- tank
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
-
- 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
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/06—Dewatering or demulsification of hydrocarbon oils with mechanical means, e.g. by filtration
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention belongs to ethylene and correlative technology fields, and in particular to the device and method of separating heavy from ethane cracking product.The device includes quenching water column, gun barrel and heavy oil tank；The quenching water column is connected to raw cracked gas feeding line, and quenching water column bottom is provided with heavy oil discharge outlet, is connected to heavy oil tank, and side is connected to by lateral line discharging pipeline with gun barrel, and top is provided with cracking gas outlet；Quenching water column bottom is provided with multiple chilled water (chw) outlet ports, and top and middle part are provided with chilling water return port；The gun barrel is connected to by least one takeoff line with heavy oil tank, and side is provided with process water extraction mouth, and bottom is provided with product extraction mouth.Compared with existing conventional ethylene device chilling area, process of the present invention is simple and direct, and easy to operate, number of devices is few, and investment is saved, and can isolate heavy oil, fuel oil and part of gasoline component from ethane cracking product simultaneously.
Description
Technical field
The invention belongs to ethylene and correlative technology fields, more particularly, to the separating heavy from ethane cracking product
Device and method.
Background technique
The cracking stock of ethylene unit mainly has ethane, propane lighter hydrocarbons, saturation LPG, naphtha, hydrogenation tail oil and light diesel fuel
Deng general raw material is lighter, and the yield of ethylene is higher, and the energy consumption of device is also lower.The yield of ethylene when ethane is as cracking stock
(about 80%) highest, energy consumption is minimum, and with the exploitation of shale gas and associated gas all over the world, ethane cracking process will have extensively
General application.
Domestic existing ethylene unit primary raw material is naphtha, hydrogenation tail oil etc., in pyrolysis product containing a large amount of gasoline,
Quenching oil column, quenching water column, gasoline stripping tower and light, heavy fuel oil stripper, benefit is arranged in diesel oil and fuel oil ingredient, chilling area
Diesel oil and fuel oil ingredient are separated with light, heavy fuel oil stripper with quenching oil column, utilizes quenching water column and gasoline stripping tower point
From gasoline component.And in ethane cracking product based on C3s light hydrocarbon component below, gasoline, diesel oil and fuel oil and heavy oil
Component is very low, and quench oil, disk oil circulation can not all be established in chilling system, the hydro carbons that quenching oil column, quenching water column are isolated
Seldom, stripper separating effect is unobvious, and appliance arrangement investment waste is serious, therefore the chilling system of conventional ethylene device is uncomfortable
With.
Summary of the invention
To solve the problems, such as to lack in the prior art the separating heavy means from ethane cracking product, the present invention provides
A kind of device and method of the separating heavy from ethane cracking product.Process of the present invention is simple and direct, easy to operate, number of devices
Few, investment is saved, and can isolate gasoline, fuel oil and heavy oil component from ethane cracking product simultaneously.
To achieve the goals above, the present invention provides a kind of device of separating heavy from ethane cracking product, the dress
It sets including quenching water column, gun barrel and heavy oil tank；
The quenching water column is connected to raw cracked gas feeding line, and quenching water column bottom is provided with heavy oil discharge outlet, with
Heavy oil tank connection, side are connected to by lateral line discharging pipeline with gun barrel, and top is provided with cracking gas outlet；Quenching water column
Bottom is provided with multiple chilled water (chw) outlet ports, and top and middle part are provided with chilling water return port；
The gun barrel is connected to by least one takeoff line with heavy oil tank, and side is provided with process water extraction mouth,
Bottom is provided with product extraction mouth.
The interface internal adapter tube of a kind of preferred embodiment according to the present invention, the chilled water (chw) outlet port stretches out upwards, connects
The pipe other end is connected to chilling water pump.
Preferably, the heavy oil discharge outlet is arranged in the quenching water column tower bottom minimum point, enters with the heavy oil tank side
Mouth connection.
Preferably, quenching water column lower part higher position side is open, and passes through lateral line discharging pipeline and the grease point
It is connected to from tank entrance.
A kind of preferred embodiment according to the present invention, the gun barrel are internally provided with coalescing internal and partition, will
Space is divided into three parts in tank: close to coalescing internal side be buffering side, close to partition side be light oil side, coalescing internal with every
It is water side between plate；Each section tank bottom is respectively arranged with takeoff line, the takeoff line and the heavy oil tank entrance of buffering side and water side
Connection, the takeoff line of light oil side are connected to petrol pump.
Preferably, the process water extraction mouth is arranged in the middle part of the side wall of water side, with process water system connectivity.
Preferably, the gun barrel entrance is located at the buffering side；Balanced line is arranged in the gun barrel tank deck
It is connected to the quenching water column lower part.
A kind of preferred embodiment according to the present invention, the heavy oil tank top connect with gun barrel and quenching water column tower reactor
Logical, bottom is connected to petroleum pump.
The present invention also provides a kind of methods of separating heavy from ethane cracking product, and this method is in above-mentioned device
It carries out, this method comprises:
Cracking gas from pyrolysis furnace is sent into quenching water column and is further cooled down after cooling down, dilute in cracking gas
It releases steam and heavy constituent is condensed, from quenching water column bottom discharge to heavy oil tank, chilled water (chw) is sent the heavy oil of condensation from tower reactor extraction
Enter chilled water (chw) circulation, it is further by coalescence and sedimentation that the mixture containing gasoline, fuel oil and process water is sent into gun barrel
Separation, the process water isolated are sent into technique water system, and the gasoline isolated, fuel oil are sent into downstream unit or send out battery limit (BL).
Preferably, heavy constituent by chilled water (chw) takes quenching water column tower reactor in cracking gas, and heavy oil component sinks to tower bottom lowest level
And be discharged into heavy oil tank, chilled water (chw) enters chilled water (chw) through chilled water (chw) outlet port and recycles；Quenching water column lower part is taken out by oil water mixture
It is sent into gun barrel out.
Under conditions of above-mentioned gun barrel is internally provided with coalescing internal and partition；Containing gasoline, fuel oil and technique
The mixture of water enters gun barrel from side, the current stabilization buffering through gun barrel, using coalescing internal, in grease point
Middle part settle and separate from tank；Most heavy heavy oil component is deposited to tank bottom from the middle part of gun barrel, then is discharged into heavy oil tank
In；The water of secondary weight is enriched with above heavy oil component, is expelled to technique water system from the process water of water-oil separating pot sidewall extraction mouth,
The boundary position of water is not higher than the bottom surface on partition along and not less than tank in the middle part of gun barrel；Most light hydro carbons floats on the top, warp
Partition overflows to the other side of gun barrel, is sent into downstream unit through takeoff line or sends out battery limit (BL)；Buffering side passes through takeoff line
The heavy oil that bottom accumulates is emitted into heavy oil tank.
A kind of specific embodiment of the present invention is as follows: cracking gas gives up pot outlet through a series of cooling of cooling means from pyrolysis furnace
Afterwards, into quenching water column, about 40 DEG C are cooled to through chilled water (chw), the gasoline, fuel oil and heavy oil component in cracking gas are by chilled water (chw)
Bring quenching water column lower part into, due to the difference of density, heavy oil component sinks to quenching water column bottommost, through quenching water column bottom low spot
Heavy oil discharge outlet flows into heavy oil tank, and chilled water (chw) is pumped into urgency by chilled water (chw) above heavy oil, through tower bottom chilled water (chw) outlet port
Circulating chilled water, gasoline and fuel oil ingredient are drawn to water-oil separating in the top, from the higher position side in quenching water column lower part
In tank.
Coalescing internal and partition are set in gun barrel, divide the tank into three parts, buffers side, water side and light oil side,
The oil water mixture extracted out from quenching water column is flowed into the buffering side of gun barrel, passes through after the stabilization in space in the side tank
Coalescing internal enters the water side of tank, and a small amount of hydro carbons gathers into big drop by droplet in liquid, under the effect of gravity separation speed
Rate is accelerated, and a small amount of heavy oil component sinks to tank bottom, is discharged into heavy oil tank through tank bottom discharge outlet, and water is enriched in the middle part of tank, from tank side
Wall opening extraction feeding technique water system, and the smallest gasoline of density and light, the heavy fuel oil side of floating on the water, when top liquid level height
Hydro carbons overflows to light oil side when partition between water side and light oil side, and buffering side passes through takeoff line lacking bottom long-term accumulation
Amount heavy oil is emitted into heavy oil tank.In this process, the bound position of water not higher than edge on partition and is not less than gun barrel
Bottom surface, the hydro carbons of light oil side is by light oil side tank bottom discharge outlet with being pumped into downstream unit or submitting battery limit (BL).
Compared with existing conventional ethylene device chilling area, process of the present invention is simple and direct, and easy to operate, number of devices is few, investment
It saves, heavy oil, fuel oil and part of gasoline component can be isolated from ethane cracking product simultaneously.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 is the process flow chart of the separating heavy of the invention from ethane cracking product.
Fig. 2 is the schematic device of the separating heavy of the invention from ethane cracking product.
Fig. 3 is quenching water column tower bottom aperture situation schematic diagram in the present invention.
Description of symbols:
1 quenching water column；2 gun barrels；3 heavy oil tanks；4 petroleum pumps；5 petrol pumps；6 raw cracked gas；7 cooling cracking
Gas；8 upper sections return to chilled water (chw)；9 middle sections return to chilled water (chw)；10 extraction chilled water (chw)s；11 heavy oil；12 process waters；13 gasoline, fuel
Oil；14 coalescing internals；15 partitions；16 heavy oil discharge outlets；17 chilled water (chw) outlet ports.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.
Embodiment 1:
As shown in Figure 1 and Figure 2, the device of the separating heavy from ethane cracking product includes quenching water column 1, grease
Knockout drum 2 and heavy oil tank 3；
The quenching water column 1 is connected to raw cracked gas feeding line, and 1 bottom of quenching water column is provided with heavy oil discharge outlet
16, it is connected to heavy oil tank 3, side is connected to by lateral line discharging pipeline with gun barrel 2, and top is provided with cracking gas outlet；
1 bottom of quenching water column is provided with multiple chilled water (chw) outlet ports 17, and top is provided with the return port that upper section returns to chilled water (chw) 8, middle part
It is provided with the return port that middle section returns to chilled water (chw) 9；The gun barrel 2 is connected to by two takeoff lines with heavy oil tank 3, side
It is provided with process water extraction mouth, bottom is provided with product extraction mouth.
Wherein, the interface internal adapter tube of the chilled water (chw) outlet port 17 stretches out upwards, and the adapter tube other end and chilling water pump are (not
Show) connection；The heavy oil discharge outlet 16 is arranged in the 1 tower bottom minimum point of quenching water column, with 3 one side entrance of heavy oil tank
Connection；1 lower part higher position side of the quenching water column opening, passes through lateral line discharging pipeline and 2 entrance of gun barrel
Connection.The set-up mode of the chilled water (chw) outlet port 17 and heavy oil discharge outlet 16 is as shown in Figure 3.
The gun barrel 2 is internally provided with coalescing internal 14 and partition 15, space in tank is divided into three parts: close
Coalescing internal side is buffering side, is light oil side close to partition side, is water side between coalescing internal 14 and partition 15；Each section
Tank bottom is respectively arranged with takeoff line, and the takeoff line for buffering side and water side is connected to heavy oil tank entrance, the takeoff line and vapour of light oil side
Oil pump 5 is connected to；The process water extraction mouth is arranged in the middle part of the side wall of water side, with process water system connectivity；The gun barrel 2
Entrance is located at the buffering side；2 tank deck of the gun barrel setting balanced line is connected to 1 lower part of quenching water column.
3 top of heavy oil tank is connected to gun barrel 2 and 1 tower reactor of quenching water column, and bottom is connected to petroleum pump 4.
During the work time, the method for separating heavy includes: from ethane cracking product
Cracking gas from pyrolysis furnace is sent into quenching water column 1 after necessary cooling system is cooling, in quenching water column 1,
The chilled water (chw) of circulation makes cracking gas be further cooled to about 40 DEG C, and the dilution steam generation and heavy constituent in cracking gas are brought by chilled water (chw)
1 lower part of quenching water column, due to the difference of density, the heavy oil component of condensation sinks to quenching water column bottommost, through 1 bottom of quenching water column
Low spot heavy oil discharge outlet 16 flows into heavy oil tank 3, and chilled water (chw) passes through chilled water (chw) above heavy oil, through tower bottom chilled water (chw) outlet port 17
Chilled water (chw) circulation, gasoline and weight fuel oil ingredient are pumped into the top, is taken out from the higher position side in 1 lower part of quenching water column
Out into gun barrel 2.
Mixture into gun barrel 2 contains gasoline, fuel oil, process water and minute quantity heavy oil soluble in water,
Current stabilization buffering through tank, using with coalescing internal 14, in the middle part settle and separate of tank；Hydro carbons is agglomerated into big liquid by droplet
Drop, under the effect of gravity, most heavy heavy oil component is deposited to bottom in heavy oil side, is discharged into heavy oil tank 3 through tank bottom takeoff line；
The water of secondary weight is enriched at middle part, and the opening in the middle part of tank is expelled to technique water system；Most light hydro carbons floats on the top, through partition
15 overflow to the light oil side of tank, are sent into downstream unit through petrol pump 5 or send out battery limit (BL)；It is by takeoff line that bottom is long-term to buffer side
A small amount of heavy oil of accumulation is emitted into heavy oil tank 3；Wherein, the boundary position of 2 middle part water of gun barrel not higher than on partition 15 along and
Not less than the bottom surface of tank.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of device of the separating heavy from ethane cracking product, which is characterized in that the device includes quenching water column, grease
Knockout drum and heavy oil tank；
The quenching water column is connected to raw cracked gas feeding line, and quenching water column bottom is provided with heavy oil discharge outlet, with heavy oil
Tank connection, side are connected to by lateral line discharging pipeline with gun barrel, and top is provided with cracking gas outlet；Quenching water column bottom
Multiple chilled water (chw) outlet ports are provided with, top and middle part are provided with chilling water return port；
The gun barrel is connected to by least one takeoff line with heavy oil tank, and side is provided with process water extraction mouth, bottom
It is provided with product extraction mouth.
2. the device of the separating heavy according to claim 1 from ethane cracking product, wherein the chilled water (chw) extraction
The interface internal adapter tube of mouth stretches out upwards, and the adapter tube other end is connected to chilling water pump.
3. the device of the separating heavy according to claim 1 from ethane cracking product, wherein the heavy oil discharge outlet
It is arranged in the quenching water column tower bottom minimum point, is connected to one side entrance of heavy oil tank.
4. the device of the separating heavy according to claim 1 from ethane cracking product, wherein under the quenching water column
Portion, side, higher position opening, is connected to by lateral line discharging pipeline with the gun barrel entrance.
5. the device of the separating heavy according to claim 1 from ethane cracking product, wherein the gun barrel
Be internally provided with coalescing internal and partition, space in tank be divided into three parts: close to coalescing internal side for buffering side, close to every
Plate side is light oil side, is water side between coalescing internal and partition；Each section tank bottom is respectively arranged with takeoff line, buffers side and water
The takeoff line of side is connected to heavy oil tank entrance, and the takeoff line of light oil side is connected to petrol pump.
6. the device of the separating heavy according to claim 5 from ethane cracking product, wherein the process water extraction
Mouth is arranged in the middle part of the side wall of water side, with process water system connectivity.
7. the device of the separating heavy according to claim 5 from ethane cracking product, wherein the gun barrel
Entrance is located at the buffering side；The gun barrel tank deck setting balanced line is connected to the quenching water column lower part.
8. the device of the separating heavy according to claim 1 from ethane cracking product, wherein at the top of the heavy oil tank
It is connected to gun barrel and quenching water column tower reactor, bottom is connected to petroleum pump.
9. a kind of method of the separating heavy from ethane cracking product, which is characterized in that this method is appointed in claim 1-8
It is carried out in device described in meaning one, this method comprises:
Cracking gas from pyrolysis furnace is sent into quenching water column and is further cooled down after cooling down, and the dilution in cracking gas is steamed
Vapour and heavy constituent are condensed, and the heavy oil of condensation from quenching water column bottom discharge to heavy oil tank, extract out from tower reactor and be sent into suddenly by chilled water (chw)
Circulating chilled water, the mixture containing gasoline, fuel oil and process water are sent into gun barrel by coalescence and settle further separation,
The process water isolated is sent into technique water system, and the gasoline isolated, fuel oil are sent into downstream unit or send out battery limit (BL).
10. the method for the separating heavy according to claim 9 from ethane cracking product, wherein in gun barrel
Portion is provided with coalescing internal and partition；
Mixture containing gasoline, fuel oil and process water enters gun barrel from side, the current stabilization buffering through gun barrel,
Using coalescing internal, in the middle part settle and separate of gun barrel；Most heavy heavy oil component is heavy from the middle part of gun barrel
Tank bottom is dropped to, then is discharged into heavy oil tank；The water of secondary weight is enriched with above heavy oil component, from the process water of water-oil separating pot sidewall
It produces mouth and is expelled to technique water system, the boundary position of water is not higher than the bottom surface on partition along and not less than tank in the middle part of gun barrel；
Most light hydro carbons floats on the top, and the other side of gun barrel is overflowed to through partition, is sent into downstream unit through takeoff line or send
Battery limit (BL) out；The heavy oil that bottom accumulates is emitted into heavy oil tank by buffering side by takeoff line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822896.5A CN109486505B (en) | 2017-09-13 | 2017-09-13 | Device and method for separating heavy components from ethane cracking products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822896.5A CN109486505B (en) | 2017-09-13 | 2017-09-13 | Device and method for separating heavy components from ethane cracking products |
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| Publication Number | Publication Date |
|---|---|
| CN109486505A true CN109486505A (en) | 2019-03-19 |
| CN109486505B CN109486505B (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710822896.5A Active CN109486505B (en) | 2017-09-13 | 2017-09-13 | Device and method for separating heavy components from ethane cracking products |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948698A (en) * | 2010-10-14 | 2011-01-19 | 天津大学 | Novel energy-saving device for condensing and recovering oil shale in retorting oil gas and method |
-
2017
- 2017-09-13 CN CN201710822896.5A patent/CN109486505B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948698A (en) * | 2010-10-14 | 2011-01-19 | 天津大学 | Novel energy-saving device for condensing and recovering oil shale in retorting oil gas and method |
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| CN109486505B (en) | 2021-01-08 |
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