CN101638585A - Delayed coking method - Google Patents
Delayed coking method Download PDFInfo
- Publication number
- CN101638585A CN101638585A CN 200910065265 CN200910065265A CN101638585A CN 101638585 A CN101638585 A CN 101638585A CN 200910065265 CN200910065265 CN 200910065265 CN 200910065265 A CN200910065265 A CN 200910065265A CN 101638585 A CN101638585 A CN 101638585A
- Authority
- CN
- China
- Prior art keywords
- coke
- coke drum
- tower
- delayed coking
- cat head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Coke Industry (AREA)
Abstract
The invention discloses a delayed coking method which comprises the following steps: 1) putting materials at the temperature of 480 DEG C-515 DEG C into a coke tower from the upper part of the coke tower, and conducting coking reaction for 2hr-16hr under the condition that the gauge pressure at the top of the tower is 0.103MPa-0.3MPa; and 2) laying the coke tower aside for 0min-4hr or after steamstripping for 20min-120min, blowing in inert gas from the upper part of the coke tower to maintain the pressure at the top of the tower to be 0.20MPa-0.6MPa, and discharging coke from the bottom of the tower. The delayed coking method shortens the decoking time, and prolongs the service life of the coke tower.
Description
Technical field
The invention belongs to the petroleum refining technology field, relate to the improvement to the delayed coking decoking, specifically, is a kind of method that shortens the delayed coking green coke cycle.
Technical background
Delay coking process have adaptability to raw material strong, take off that charcoal is thorough, flow process simple, advantage such as technology maturation, plant investment are low, become one of important process of heavy oil deep processing.China is delayed coking working ability in the world and technical development one of country faster, and state of the art is near external advanced level.The working ability of delayed coking in the end of the year 2006 has surpassed 50Mt/a, estimates will reach 70Mt/a in 2010, is only second in the U.S.; The scale of single covering device has reached 2.1Mt/a.In recent years, along with the heaviness and the deep drawing The Application of Technology of imported crude oil, high carbon residue, high-sulfur, high metal heavy oil are difficult to the material of mixing as catalytic cracking, have further promoted the development of China's delayed coking technology.
In delay coking process, the mixing oil of stock oil or stock oil and turning oil becomes high-temperature material by the process furnace radiation chamber and enters two coke drums that be arranged in parallel one from the bottom by transfer line and carry out pyrogenic reaction, and reaction oil gas carries out fractionation from the cat head knockout tower that goes out to make a return journey.When a coke drum was full of coke need coke cleaning, stock oil switched in another coke drum again.
Adopt above-mentioned delayed coking method, its green coke cycle is generally 24 hours, even measure such as take to increase work efficiency, its green coke cycle also had about 16 hours, and this mainly is subjected to the control of decoking process.Decoking process mainly comprises for a short time and steams out, steams out greatly, cold Jiao, draining, unloads top cover and bottom, holes, cuts Jiao, top cover and processes such as bottom, warm tower are installed.Decoking process is the program complexity not only, and the time is longer, and coke drum is in hot and cold alternative state always, and shortened its work-ing life, has also increased the energy consumption of device.
Chinese patent CN 98804337.8 discloses a kind of delayed coking method for reducing of cycling time.This method is that the coker in heat begins to feed before the step, and the STRENGTH ON COKE tower carries out indirect heating in the junction of tower shell and its support skirtboard, shortens delayed coking unit unitary cycling time with this.This can reduce the thermal stresses in the weld seam neighboring area of tower skirt plate.This method has suitably shortened the green coke time, but the work-ing life of proper extension coke drum, but the decoking mode is identical with conventional delayed coking decoking mode, promptly not cancellation steam out for a short time, steam out greatly, cold Jiao, draining, unload top cover and bottom, hole, cut Jiao, upper top cover and bottom, process such as warm tower, the decoking time is longer, and the green coke cycle of delayed coking should be more than 16 hours.
Summary of the invention
The objective of the invention is existing decoking technology is improved, shorten the green coke cycle of delayed coking, the energy consumption of reducing apparatus is avoided the cold and hot loop cycle of coke drum, simultaneously to prolong the work-ing life of coke drum.
The invention provides a kind of delayed coking method, concrete steps are:
1) temperature is 480 ℃～515 ℃, and preferred 485～510 ℃ of materials enter coke drum from the top or the bottom of coke drum, is to carry out pyrogenic reaction 2hr～16hr under 0.103Mpa～0.3MPa condition in the gauge pressure of cat head, preferred 3hr～8hr;
2) coke drum is placed the preferred 30min～150min of 0min～4hr, or through the preferred 30min of 20min～120min～60min stripping, be blown into rare gas element from tower top, the pressure of keeping cat head is the preferred 0.30MPa～0.45MPa of 0.20MPa～0.6MPa, and coke draws off from tower bottom.
Described coke drum is at least 2, realizes the coke drum blocked operation, and whole flow process is continuous.
The high temperature coke of discharging from coke drum bottom can directly be discharged to Jiao Chizhong after cooling, also can deliver to other storeroom by transport tape.
This prior art is compared, and the advantage of invention is:
1. technical process is simple, because of having cancelled cold burnt process, has shortened the decoking time;
2. avoid the cold and hot loop cycle of coke drum, can prolong the work-ing life of coke drum;
3. after cancelling cold burnt process, can save the power consumption and the required heat of warm tower of coke cooling water pump, high pressure decoking water pump; Simultaneously can utilize the heat generation steam of hot coke, thereby reduce the running cost of device;
4. avoid the processing of coke cooling water and coke cutting water, but alleviator is to the pollution of environment;
Description of drawings
Below in conjunction with accompanying drawing processing method provided by the present invention is given further instruction.
Fig. 1 is that raw material of the present invention is from coke drum top charging schematic flow sheet
Fig. 2 is that raw material of the present invention is from coke drum underfeed schematic flow sheet
Fig. 3 is the prior art schematic flow sheet
1,2-coke drum, 3,4-coke discharging valve, 5-heat-exchange equipment, 6-high-temperature material, 7-oil gas, 8-rare gas element, 9-steam, 10 coke lines, 11 drilling rods, 12 coke cutters, 13 high pressure waters.
Concrete true mode
Being 480 ℃～515 ℃ high-temperature materials 6 as accompanying drawing 1 temperature enters coke drum from the top of coke drum 1 or 2, gauge pressure at cat head is 0.103Mpa～0.3MPa, reaction 2hr～16hr, the high-temperature oil gas 7 that reaction generates is discharged from the cat head of coke drum 1 or 2, through chilling after pipeline goes separation column to separate; Coke drum 1 or 2 is placed 0min～4hr, or through steam 9 stripping 20min～120min, rare gas element 8 is blown into from the top of this tower, and the gauge pressure of cat head is 0.20MPa～0.6MPa, opens coke discharging valve 3 or coke discharging valve 4, high temperature coke 10 high-temperature cokes.
Being 480 ℃～515 ℃ high-temperature materials 6 as accompanying drawing 2 as accompanying drawing 1 temperature enters coke drum from the bottom of coke drum 1 or 2, gauge pressure at cat head is 0.103Mpa～0.3MPa, reaction 2hr～16hr, the high-temperature oil gas 7 that reaction generates is discharged from the cat head of coke drum 1 or 2, through chilling after pipeline goes separation column to separate; Coke drum 1 or 2 is placed 0min～4hr, or through steam 9 stripping 20min～120min, rare gas element 8 is blown into from the top of this tower, and the gauge pressure of cat head is 0.20MPa～0.6MPa, opens coke discharging valve 3 or coke discharging valve 4, high temperature coke 10 high-temperature cokes.
Embodiment 1:
From the delayed coker unit furnace radiation chamber (is the process furnace of pilot plant, down with) 496 ℃ high-temperature material enters coke drum by transfer line from the top of coke drum and carries out pyrogenic reaction, the gauge pressure of control coke drum cat head is 0.2Mpa, reaction oil gas is discharged behind chilling (controlled temperature is about 420 ℃, down together) from cat head and is gone knockout tower to separate; The feed time of coke drum is 5hr, and at this moment 496 ℃ high-temperature-coked material switches to and carries out pyrogenic reaction in another coke drum; Prepare the coke drum of decoking and under the state of heat, keep 60min, at this moment the top from this tower is blown into the low-pressure water steam, the gauge pressure of keeping the coke drum cat head is 0.45MPa, at this moment open the coke discharging valve of coke drum bottom, coke is extruded by rare gas element water vapour, and the coke of extruding is discharged after the heat-exchange equipment cooling.
Comparative Examples 1:
Enter coke drum by transfer line at the bottom of the coke Tata from the high-temperature material of 496 ℃ of delayed coker unit furnace radiation chambers and carry out pyrogenic reaction, the gauge pressure of control coke drum cat head is 0.2Mpa, and reaction oil gas is discharged from cat head and gone knockout tower to separate behind chilling; The feed time of coke drum is 18hr, and at this moment 496 ℃ high-temperature-coked material switches to and carries out pyrogenic reaction in another coke drum; The coke drum of preparing decoking begins boring then and cuts Jiao through steaming out for a short time, steam out greatly, behind the cold Jiao, draining, opening the top cover and the bottom of this coke drum, removed defocused on the top cover and the bottom of coke drum, warm up tower then, stand-by.This decoking process needs 16hr～24hr.
The stock oil character of embodiment 1 and Comparative Examples 1 processing sees Table 1; The operational condition contrast sees Table 2.
The main character of table 1 embodiment 1 and Comparative Examples 1 charging heavy oil
The operational condition contrast of table 2 embodiment and Comparative Examples
Embodiment 2:
Test raw material oil is with embodiment 1, enter coke drum by transfer line from the bottom of coke drum from the high-temperature material of 498 ℃ of delayed coker unit furnace radiation chambers and carry out pyrogenic reaction, the gauge pressure of control coke drum cat head is 0.17Mpa, and reaction oil gas is discharged from cat head and gone knockout tower to separate behind chilling; The feed time of coke drum is 4hr, and at this moment 498 ℃ high-temperature-coked material switches to and carries out pyrogenic reaction in another coke drum; Prepare the coke drum of decoking and under the state of heat, keep 120min, at this moment the top from this tower is blown into nitrogen, and the gauge pressure of keeping the coke drum cat head is 0.38MPa, at this moment opens the coke discharging valve of coke drum bottom, coke is extruded by inert nitrogen gas, and the coke of extruding is discharged after the heat-exchange equipment cooling.
Embodiment 3:
Test raw material oil is with embodiment 1, enter coke drum by transfer line from the top of coke drum from the high-temperature material of 494 ℃ of delayed coker unit furnace radiation chambers and carry out pyrogenic reaction, the gauge pressure of control coke drum cat head is 0.19Mpa, and reaction oil gas is discharged from cat head and gone knockout tower to separate behind chilling; The feed time of coke drum is 4.5hr, and at this moment 494 ℃ high-temperature-coked material switches to and carries out pyrogenic reaction in another coke drum; Prepare the coke drum of decoking and under the state of heat, keep 60min, at this moment go into the coke stripping 30min of an amount of steam from the tower bottom blowing to generating, top from this tower is blown into water vapour then, make the gauge pressure of coke drum cat head maintain 0.40MPa, at this moment open the coke discharging valve of coke drum bottom, coke is extruded by rare gas element water vapour, discharged after the coke heat apparatus cools of extruding.
Comparative Examples 1:
Enter coke drum by transfer line at the bottom of the coke Tata from the high-temperature material of 496 ℃ of delayed coker unit furnace radiation chambers and carry out pyrogenic reaction, the gauge pressure of control coke drum cat head is 0.2Mpa, and reaction oil gas is discharged from cat head and gone knockout tower to separate behind chilling; The feed time of coke drum is 18hr, and at this moment 496 ℃ high-temperature-coked material switches to and carries out pyrogenic reaction in another coke drum; The coke drum of preparing decoking begins boring then and cuts Jiao through steaming out for a short time, steam out greatly, behind the cold Jiao, draining, opening the top cover and the bottom of this coke drum, removed defocused on the top cover and the bottom of coke drum, warm up tower then, stand-by.This decoking process needs 16hr～24hr.
Claims (4)
1. delayed coking method is characterized in that:
1) to be 480 ℃～515 ℃ materials enter coke drum from the top of coke drum to temperature, is to carry out pyrogenic reaction 2hr～16hr under 0.103Mpa～0.3MPa condition in the gauge pressure of cat head;
2) coke drum is placed 0min～4hr or through 20min～120min stripping, and be blown into rare gas element to keep the pressure of cat head be 0.20MPa～0.6MPa from tower top, and coke draws off from tower bottom.
2. according to the described a kind of delayed coking method of claim 1, it is characterized in that: temperature is that 485 ℃～510 ℃ materials enter coke drum from the coke drum bottom.
3. according to claim 1 or 2 described a kind of delayed coking methods, it is characterized in that: the pyrogenic reaction time is 3hr～8hr, coke drum is placed as 30min～150min or through 30min～60min stripping, and be blown into rare gas element to keep the pressure of cat head be 0.30MPa～0.45MPa from tower top.
4. according to claim 1 or 2 described a kind of delayed coking methods, it is characterized in that: coke drum is at least 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100652659A CN101638585B (en) | 2009-06-25 | 2009-06-25 | Delayed coking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100652659A CN101638585B (en) | 2009-06-25 | 2009-06-25 | Delayed coking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101638585A true CN101638585A (en) | 2010-02-03 |
| CN101638585B CN101638585B (en) | 2013-11-20 |
Family
ID=41613765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100652659A Active CN101638585B (en) | 2009-06-25 | 2009-06-25 | Delayed coking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101638585B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220165A (en) * | 2010-04-13 | 2011-10-19 | 中国石油化工集团公司 | Process for delaying coking |
| CN102220166A (en) * | 2010-04-13 | 2011-10-19 | 中国石油化工集团公司 | Delayed coking method |
| CN102234533A (en) * | 2010-05-05 | 2011-11-09 | 中国石油化工集团公司 | Delayed coking method |
| CN102329633A (en) * | 2011-08-31 | 2012-01-25 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| CN102344825A (en) * | 2010-07-30 | 2012-02-08 | 中国石油化工集团公司 | Continuous delay coking device and method |
| CN102732297A (en) * | 2011-04-12 | 2012-10-17 | 中国石油化工股份有限公司 | Method for delaying coking |
| CN102899076A (en) * | 2011-07-27 | 2013-01-30 | 中国石油化工股份有限公司 | Delayed coking method |
| CN106635101A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Delay coking tower and method for preparing needle coke |
| CN107485948A (en) * | 2017-09-05 | 2017-12-19 | 常州大学 | A kind of new coker gas gas purification technique |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547284A (en) * | 1982-02-16 | 1985-10-15 | Lummus Crest, Inc. | Coke production |
| CN1119389C (en) * | 1999-09-29 | 2003-08-27 | 中国石油化工集团公司 | Coking delay process for lowering foam layer in coke tower |
| CN1261526C (en) * | 2003-07-31 | 2006-06-28 | 中国石油化工股份有限公司 | High acid value hydrocarbon oil delayed coking method |
-
2009
- 2009-06-25 CN CN2009100652659A patent/CN101638585B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220166A (en) * | 2010-04-13 | 2011-10-19 | 中国石油化工集团公司 | Delayed coking method |
| CN102220165A (en) * | 2010-04-13 | 2011-10-19 | 中国石油化工集团公司 | Process for delaying coking |
| CN102234533B (en) * | 2010-05-05 | 2014-01-01 | 中国石油化工集团公司 | Delayed coking method |
| CN102234533A (en) * | 2010-05-05 | 2011-11-09 | 中国石油化工集团公司 | Delayed coking method |
| CN102344825A (en) * | 2010-07-30 | 2012-02-08 | 中国石油化工集团公司 | Continuous delay coking device and method |
| CN102344825B (en) * | 2010-07-30 | 2014-02-26 | 中国石油化工集团公司 | Continuous delay coking device and method |
| CN102732297B (en) * | 2011-04-12 | 2014-08-13 | 中国石油化工股份有限公司 | Method for delaying coking |
| CN102732297A (en) * | 2011-04-12 | 2012-10-17 | 中国石油化工股份有限公司 | Method for delaying coking |
| CN102899076A (en) * | 2011-07-27 | 2013-01-30 | 中国石油化工股份有限公司 | Delayed coking method |
| CN102329633B (en) * | 2011-08-31 | 2013-09-18 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| CN102329633A (en) * | 2011-08-31 | 2012-01-25 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| CN106635101A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Delay coking tower and method for preparing needle coke |
| CN107485948A (en) * | 2017-09-05 | 2017-12-19 | 常州大学 | A kind of new coker gas gas purification technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101638585B (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101638585B (en) | Delayed coking method | |
| CN102295943B (en) | Method for coking needle coke by large recycle ratio oil system | |
| CN100362081C (en) | Industrial producing process for coal series needle coke | |
| CN104896926B (en) | The heating furnace of a kind of multiple hearth structure and method for designing thereof and purposes | |
| CN107057740B (en) | Modified asphalt production device | |
| CN102732297B (en) | Method for delaying coking | |
| CN202403609U (en) | Device for paraffin deposition treatment of water cooler in methanol synthesis | |
| CN201077829Y (en) | Coke tower bottom feeder | |
| CN102746883A (en) | Oil atmospheric vacuum distillation technology | |
| CN101531919B (en) | Energy-saving device and operation process for absorption-stabilization system | |
| CN101348730B (en) | Crude oil gradual distillation energy saving apparatuses and technological process | |
| CN102603455B (en) | Process and device for recovering C2 materials in ethylene device | |
| CN108102688A (en) | A kind of delayed coking coke drum heat control technique | |
| CN214654662U (en) | Cooking equipment oil gas recovery system | |
| CN105985804B (en) | A kind of mink cell focus processing technology and processing unit (plant) | |
| CN205368237U (en) | Biological carbide furnace of high -efficient tubular | |
| CN209797884U (en) | High-temperature gas heat recycling system | |
| CN107557046A (en) | A kind of liquefied method of straw splitting | |
| CN103805226A (en) | Delayed coking method | |
| CN102786953A (en) | Coke oven grouped novel bridge pipe crude gas waste heat recovery device | |
| CN217651150U (en) | Oil gas recovery processing system for delayed coking | |
| CN106010613A (en) | Method and equipment for direct acquisition of light oil by pyrolysis of small granular oil sand | |
| CN110527548A (en) | A kind of delayed coking coke drum conduction oil circulation preheating device and technique | |
| CN104593064B (en) | The separation method of pyrolysis gasoline hydrogenation device second stage reactor outlet material | |
| CN103113906A (en) | Coking delaying method of easy-coking oil product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Group Corp. Co-applicant after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant before: China Petrochemical Group Corp. Co-applicant before: Luoyang Petrochemical Engineering Co., China Petrochemical Group |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |