CN109022031A - Reduce the delayed coking method and processing of heavy oil method of sewage discharge - Google Patents
Reduce the delayed coking method and processing of heavy oil method of sewage discharge Download PDFInfo
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- CN109022031A CN109022031A CN201810947739.1A CN201810947739A CN109022031A CN 109022031 A CN109022031 A CN 109022031A CN 201810947739 A CN201810947739 A CN 201810947739A CN 109022031 A CN109022031 A CN 109022031A
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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
- C10G55/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process
- C10G55/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only
- C10G55/04—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one thermal cracking step
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
- C10G2300/1007—Used oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1077—Vacuum residues
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention relates to petroleum refining fields, in particular to a kind of delayed coking method and processing of heavy oil method for reducing sewage discharge.Reduce the delayed coking method of sewage discharge, comprising the following steps: be passed through sealing gas medium to the valve of the pipeline between coke drum and fractionating column, the sealing gas medium includes any one or two kinds in stripping gas and device in Gas.The consumption of the water vapour of device and the discharge of sour water are not only reduced, while also significantly reducing the energy consumption of device.Meanwhile using stripping gas or device in Gas after, processed through coking plant absorbing-stabilizing system, can be recycled C3And the above component, the surplus capacity of coking plant absorbing-stabilizing system is taken full advantage of, the process flow of refinery is optimized, the processing charges for separating this portion gas is reduced, increases the economic benefit of enterprise.
Description
Technical field
The present invention relates to petroleum refining field, in particular to a kind of delayed coking method for reducing sewage discharge and
Processing of heavy oil method.
Background technique
Heavy Oil Processing Technology can be divided into two classes, and one kind is plus hydrogen, one kind are to take off charcoal, and delay coking process is suitable with raw material
The advantages such as Ying Xingqiang, process flow be simple, technology relative maturity, plant investment are low, it has also become the important hand of heavy oil deep processing
One of section.
The heating furnace continuous feed of delayed coking unit, and coke drum will switch over operation.Due to delayed coking unit
The raw material of processing is the poor residual oil of property, high-temperature oil gas easy green coke in furnace tubing and pipeline, therefore, in coke drum tower
It pushes up to the valve location on the oil-gas pipeline between fractionating column and injects a large amount of water vapour, main purpose is to pass through water vapor purging
To prevent oil gas in the coking of valve position, valve coking or the improper shut-down of stuck caused device are avoided.Although using injection
Water vapour method prevention valve coking or it is stuck be relatively simple method, still, but use water vapour as sealing be situated between
Matter will lead to water vapour and largely consume, and increase the energy consumption of device；A large amount of sour water is generated simultaneously, is brought to enterprise heavier
Environmental burden.
Summary of the invention
The present invention provides a kind of delayed coking methods for reducing sewage discharge, which reduce the consumption of device water vapour and
The discharge of sour water, while the energy consumption of device is also significantly reduced, reduce production cost.
The present invention also provides a kind of processing of heavy oil methods, and low energy consumption, is able to ascend yield, reduce the discharge of sewage.
The present invention is implemented as follows:
A kind of delayed coking method reducing sewage discharge, comprising the following steps:
It is passed through sealing gas medium to the valve of the pipeline between coke drum and fractionating column, the sealing gas medium includes
Any one in stripping gas and device in Gas or two kinds.
A kind of processing of heavy oil method comprising the delayed coking method of above-mentioned reduction sewage discharge.
The beneficial effects of the present invention are: the present invention is by being passed through desorption to the valve of the pipeline between coke drum and fractionating column
Gas and/or device in Gas effectively reduce the note that coke drum tower top oil gas is exported between fractionating column low-pressure steam on oil-gas pipeline
Enter amount, overcome current coking plant and fill the water more defect, not only reduces consumption and the sour water of the water vapour of device
Discharge, also significantly reduce the energy consumption of device.Meanwhile using stripping gas or device in Gas after, through coking plant Vapor recovery unit
System processing, can be recycled C3And the above component, the surplus capacity of coking plant absorbing-stabilizing system is taken full advantage of, refinery is optimized
Process flow, reduce separate this portion gas processing charges, increase the economic benefit of enterprise.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described.
Fig. 1 is process flow diagram provided in an embodiment of the present invention.
Icon: 1- heating furnace；2- coke drum；3- fractionating column；4- oil gas multiple-way valve；5- ring valve；6- blow valve；7- coker gas oil changes
Hot device；8- coking light wax oil heat exchanger；9- coking wax slop heat exchanger；10- coking cycle oil heat exchanger.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The delayed coking method to the reduction sewage discharge of the embodiment of the present invention and processing of heavy oil method carry out specific below
Explanation.
A kind of delayed coking method reducing sewage discharge, comprising the following steps:
Firstly, carrying out heat exchange using the product for separating the sealing gas medium and fractionating column.Fractionating column point
Separate out the product come include coker gas oil or with light wax tailings, weight wax tailings, one of coking recycle oil or it is a kind of with
On.Heat exchange is that the product separated using fractionating column heats sealing gas medium, so that the behaviour of delayed coking unit
Make more steady, safety, and can guarantee that oil gas reaction is gone on smoothly.Meanwhile heat exchange, energy are carried out using the product of fractionating column
Energy consumption is enough reduced, reduces production cost, and be avoided that production safety hidden danger caused by valve uneven heating.
The temperature of sealing gas medium is 150~300 DEG C, preferably 180~260 DEG C after heat exchange.Circulation in pipeline
Product temperatur it is higher, and if the temperature of sealing gas medium is too low, it will so that valve uneven heating, is then easy to cause peace
Full accident.Cause energy consumption excessively high if the temperature of sealing gas medium is excessively high, increases production cost.It is situated between by control sealing gas
The temperature of matter can make the operation of delayed coking unit more steady, safe.
Further, the pressure of sealing gas medium is greater than 0.3MPa, preferably 0.3~1.2MPa, further preferably
0.4~0.6MPa.The pressure of control sealing gas medium can guarantee that valve works normally, and guarantee that low energy consumption.Meanwhile to close
The pressure of envelope gas medium is controlled, and can be advanced optimized linear speed of the oil gas in pipeline and valve, be prevented oil-gas pipeline
With valve coking.
Further, sealing gas medium is the mixture of any one or two kinds of stripping gas or device in Gas.Using
Stripping gas or device in Gas, can guarantee that it effectively purges valve, can then prevent oil gas in valve coking, protect
Card valve can work normally, meanwhile, the waste water of intractable oil-containing, sulfur-bearing will not be generated.Meanwhile stripping gas and device in Gas are logical
Enter valve not and will cause valve topical hypothermia, then guarantees the stability and safety of production.
Stripping gas is the PSA device from refinery, hydro-refining unit, hydro-upgrading unit, hydrocracking unit, residual oil
Any one or more than one combined gas in hydrodesulfurization unit, catalytic reforming unit or device for producing hydrogen.Stripping gas
Including hydrogen, alkanes substance, alkanes substance includes the alkane that methane, ethane, propane and carbon number are not less than 4.Specifically,
It include ethane, the 10-12% of the hydrogen of 40-45%, the methane of 15-20%, 15-20% with volume percentage, in stripping gas
Propane, 10-12% carbon number are not less than 4 alkane.It can accomplish to recycle using the stripping gas of above-mentioned apparatus, then further
Production cost is reduced, while reducing the vent gas treatment of related device, further reduces pollution of the gas to air.
Further, device in Gas is the gas of the high pressure gas pipe network from refinery.Device in Gas includes hydrogen, alkanes object
Matter and olefin compound.Specifically, with volume percentage, device in Gas include the hydrogen of 13-16%, 40-45% methane,
The ethane of 15-17%, 8-10% propane 1-2% ethylene, 3-5% propylene and 8-12% carbon number be not less than 4 hydro carbons.Using
Above-mentioned device in Gas can make full use of device in Gas, further reduced production cost.
Finally, being passed through sealing gas medium, and coke drum and fractionation to the valve of the pipeline between coke drum and fractionating column
The valve of pipeline between tower includes oil gas multiple-way valve, ring valve and blow valve.The oil and gas content for flowing through above-mentioned valve is big, and therefore, it is necessary to spies
The coking situation of above-mentioned valve is not paid attention to.
Further, the amount for being passed through the sealing gas medium of the oil gas multiple-way valve is 300-400Nm3/ h, it is passed through the ring valve
The sealing gas medium amount 450-550Nm3The amount of/h and the sealing gas medium for being passed through the blow valve is
300-400Nm3/h.Being passed through sealing gas medium using above-mentioned rate can guarantee that coking will not occur for corresponding valve, meanwhile,
Energy consumption is reduced as much as possible, and can guarantee the surplus capacity for taking full advantage of coking plant absorbing-stabilizing system, optimizes refinery
Process flow reduces the processing charges for separating this portion gas, increases the economic benefit of enterprise.
As shown in Figure 1, the technique of whole delayed coking is: decompression residuum enters together after mixing with coking recycle oil and adds
Hot stove 1 heats, and the logistics high speed that heated furnace 1 is heated to 480~510 DEG C passes through oil transfer line and enters coke drum 2, and coking material exists
Cracking and condensation reaction are constantly carried out in coke drum, the coke of generation remains in coke drum 2, and the oil gas for reacting generation enters
Fractionating column 3 is fractionated, and gas and coker gasoline, coker gas oil, the products such as wax tailings are obtained after fractionation.In the above process
In, sealing gas medium is through coker gas oil heat exchanger 7 or/and coking light wax oil heat exchanger 8, coking wax slop heat exchanger 9, coking
After recycling the heat exchange heating of oil heat exchanger 10, the sealing gas medium decanting point note through pipeline oil gas multiple-way valve 4, ring valve 5 and blow valve 6
Enter.
The embodiment of the present invention also provides a kind of processing of heavy oil method comprising the delayed coking of above-mentioned reduction sewage discharge
Method.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment provides a kind of delayed coking methods for reducing sewage discharge, comprising the following steps:
Sealing gas medium provided in this embodiment is stripping gas, which is the PSA device of refinery, hydrofinishing dress
It sets, the combined gas in hydro-upgrading unit, hydrocracking unit and residuum hydrodesulfurization device.Main group of the stripping gas
At referring to table 1.
The main composition of 1 stripping gas of table
Coking material in the present embodiment is decompression residuum, and main physical property is listed in Table 2 below.Coking material enters delay coke
Change and heated in heating furnace tube, the coking material after heating enters coke drum, generates after sufficiently reacting in coke drum
Oil gas enters fractionating column and is fractionated, and obtains gas and product liquid.
The main physical property of 2 decompression residuum of table
The coker gas oil that stripping gas and fractionating column are separated exchanges heat, and temperature is risen to 230 DEG C, the pressure of stripping gas is
0.5MPa is then passed through in oil gas multiple-way valve, ring valve and the blow valve of the pipeline between coke drum and fractionating column, oil gas multiple-way valve, ring valve and
It is respectively 375Nm that the amount of stripping gas is injected in blow valve3/h、500Nm3/ h and 375Nm3/h.And delay coking heating furnace outlet temperature
Degree is 495 DEG C, and coke drum tower top pressure is 0.17MPa, recycle ratio 0.2.
The present embodiment also provides a kind of processing of heavy oil method comprising the delayed coking side of above-mentioned reduction sewage discharge
Method.
Embodiment 2
The reduction sewage discharge that the delayed coking method provided in this embodiment for reducing sewage discharge and embodiment 1 provide
Delayed coking method operating procedure is almost the same, and difference is that operating condition changes.
Specifically, the air seal medium that this implementation uses is device in Gas, and the main composition of device in Gas is referring to table 3.
The main composition of 3 device in Gas of table
The coking recycle oil and weight wax tailings heat exchange that device in Gas and fractionating column are separated, rise to 300 DEG C for temperature, watt
The pressure of this gas is 0.8MPa, is then passed through in oil gas multiple-way valve, ring valve and the blow valve of the pipeline between coke drum and fractionating column, oil
It is respectively 375Nm that the amount of device in Gas is injected in air valve, ring valve and blow valve3/h、500Nm3/ h and 375Nm3/h。
Embodiment 3
The reduction sewage discharge that the delayed coking method provided in this embodiment for reducing sewage discharge and embodiment 1 provide
Delayed coking method operating procedure is almost the same, and difference is that operating condition changes.
Specifically, for the air seal medium that this implementation uses for stripping gas, which is PSA device, hydrofinishing dress
It sets, the combination in hydro-upgrading unit, hydrocracking unit, residuum hydrodesulfurization device, catalytic reforming unit and device for producing hydrogen
Gas.The main composition of the stripping gas is referring to table 4.
The main composition of 4 stripping gas of table
Coker gas oil, weight wax tailings and the light wax tailings that stripping gas and fractionating column are separated exchange heat, by temperature liter
To 150 DEG C, the pressure of stripping gas is 0.3MPa, be then passed through the oil gas multiple-way valve of the pipeline between coke drum and fractionating column, ring valve and
In blow valve, the amount that stripping gas is injected in oil gas multiple-way valve, ring valve and blow valve is respectively 370Nm3/h、470Nm3/ h and 310N m3/
h。
Embodiment 4
The reduction sewage discharge that the delayed coking method provided in this embodiment for reducing sewage discharge and embodiment 1 provide
Delayed coking method operating procedure is almost the same, and difference is that operating condition changes.
Specifically, for the air seal medium that this implementation uses for stripping gas, which is the gas in hydrocracking unit
Body.The main composition of the stripping gas is referring to table 5.
The main composition of 5 stripping gas of table
The coker gas oil and light wax tailings that stripping gas and fractionating column are separated exchange heat, and temperature are risen to 260 DEG C, desorption
The pressure of gas is 0.4MPa, is then passed through in oil gas multiple-way valve, ring valve and the blow valve of the pipeline between coke drum and fractionating column, oil gas
It is respectively 400Nm that the amount of stripping gas is injected in valve, ring valve and blow valve3/h、550Nm3/ h and 300Nm3/h。
Embodiment 5
The reduction sewage discharge that the delayed coking method provided in this embodiment for reducing sewage discharge and embodiment 1 provide
Delayed coking method operating procedure is almost the same, and difference is that operating condition changes.
Sealing gas medium is the mixed gas of stripping gas and device in Gas, the coking that mixed gas and fractionating column are separated
Diesel oil and the heat exchange of light wax tailings, rise to 180 DEG C for temperature, and the pressure of mixed gas is 0.6MPa, be then passed through coke drum and
In the oil gas multiple-way valve of pipeline between fractionating column, ring valve and blow valve, the amount of mixed gas is injected in oil gas multiple-way valve, ring valve and blow valve
Respectively 300Nm3/h、450Nm3/ h and 400Nm3/h。
Comparative example: its operating process with embodiment 1, difference from example 1 is that, using water vapour substitute desorb
Gas, is injected into oil gas multiple-way valve, the injection rate of water vapour is respectively 300kg/h, 400kg/h and 300kg/h in ring valve and blow valve, should
The intake of vapor is that basis is passed through the stripping gas of same molar and vapor is calculated.
The coking material of same weight, coking raw material are handled with the delayed coking method that Examples 1 to 5 and comparative example 1 provide
For decompression residuum shown in table 2, each embodiment and comparative example operating parameter and test result are as shown in table 6.
The operating condition and energy consumption comparison of 6 embodiment and comparative example of table
(working ability is 1,400,000 tons/year)
According to table 6 it is found that being 1,400,000 tons/year of coking plant for working ability, with delayed coking unit annual 8400
Hour production cycle be used as benchmark, each valve water filling steam in comparative example and the sewage quantity that additionally generates is 8400 tons/year,
And water vapour is replaced not generate excess effluent using stripping gas or device in Gas in Examples 1 to 5.Meanwhile compared with comparative example,
The energy consumption of 5 embodiments reduces between 0.320~0.370kgEO/t.
In conclusion the present invention by the valve of the pipeline between coke drum and fractionating column be passed through stripping gas and/or watt
This gas effectively reduces the injection rate that coke drum tower top oil gas is exported between fractionating column low-pressure steam on oil-gas pipeline, overcomes
Current coking plant fills the water more defect, not only reduces the consumption of the water vapour of device and the discharge of sour water, together
When also significantly reduce the energy consumption of device.Meanwhile using stripping gas or device in Gas after, add through coking plant absorbing-stabilizing system
C can be recycled in work3And the above component, the surplus capacity of coking plant absorbing-stabilizing system is taken full advantage of, the technique for optimizing refinery
Process reduces the processing charges for separating this portion gas, increases the economic benefit of enterprise.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of delayed coking method for reducing sewage discharge, which comprises the following steps:
It is passed through sealing gas medium to the valve of the pipeline between coke drum and fractionating column, the sealing gas medium includes desorption
The mixture of any one or two kinds in gas and device in Gas.
2. it is according to claim 1 reduce sewage discharge delayed coking method, which is characterized in that the coke drum it
Before be passed through the sealing gas medium, the product that the sealing gas medium and fractionating column are separated carries out heat exchange.
3. the delayed coking method according to claim 2 for reducing sewage discharge, which is characterized in that the institute after heat exchange
The temperature for stating sealing gas medium is 150~300 DEG C, preferably 180~260 DEG C.
4. the delayed coking method according to claim 2 for reducing sewage discharge, which is characterized in that be passed through the coke drum
The sealing gas medium pressure be greater than 0.3MPa, preferably 0.3~1.2MPa, further preferably 0.4~0.6MPa.
5. the delayed coking method according to claim 1 for reducing sewage discharge, which is characterized in that the valve includes oil
Air valve, ring valve and blow valve.
6. the delayed coking method according to claim 5 for reducing sewage discharge, which is characterized in that be passed through the oil gas multiple-way valve
Sealing gas medium amount be 300-400Nm3/ h, be passed through the ring valve the sealing gas medium amount be 450-
550Nm3/ h and the amount for being passed through the sealing gas medium of the blow valve are 300-400Nm3/h。
7. the delayed coking method according to claim 1 for reducing sewage discharge, which is characterized in that the stripping gas comes
PSA device from refinery, hydro-refining unit, hydro-upgrading unit, hydrocracking unit, residuum hydrodesulfurization device, catalysis
Any one or more than one combined gas in reformer or device for producing hydrogen；The device in Gas is the height from refinery
Press the gas of gas pipe network.
8. the delayed coking method according to claim 7 for reducing sewage discharge, which is characterized in that the stripping gas includes
Hydrogen, alkanes substance.
9. the delayed coking method according to claim 7 for reducing sewage discharge, which is characterized in that the device in Gas includes
Hydrogen, alkanes substance and olefin compound.
10. a kind of processing of heavy oil method, which is characterized in that it includes the delay coke described in claim 1 for reducing sewage discharge
Change method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115231723A (en) * | 2022-07-28 | 2022-10-25 | 鞍钢化学科技有限公司 | Coal-based needle coke delayed coking oil-containing process wastewater separation system and method |
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| US20040200715A1 (en) * | 2003-04-11 | 2004-10-14 | Lah Ruben F. | Dynamic flange seal and sealing system |
| CN104194826A (en) * | 2014-07-31 | 2014-12-10 | 天津市瑞德赛恩新材料开发有限公司 | Technique for reducing dry gas yield in delayed coking reaction |
| CN106433740A (en) * | 2016-11-08 | 2017-02-22 | 中石化炼化工程（集团）股份有限公司 | Delayed coking method and apparatus for heavy oil |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040200715A1 (en) * | 2003-04-11 | 2004-10-14 | Lah Ruben F. | Dynamic flange seal and sealing system |
| CN104194826A (en) * | 2014-07-31 | 2014-12-10 | 天津市瑞德赛恩新材料开发有限公司 | Technique for reducing dry gas yield in delayed coking reaction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115231723A (en) * | 2022-07-28 | 2022-10-25 | 鞍钢化学科技有限公司 | Coal-based needle coke delayed coking oil-containing process wastewater separation system and method |
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Application publication date: 20181218 |