CN104479698B - Product method is protected for steam outside dry coke quenching - Google Patents
Product method is protected for steam outside dry coke quenching Download PDFInfo
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- CN104479698B CN104479698B CN201410756060.6A CN201410756060A CN104479698B CN 104479698 B CN104479698 B CN 104479698B CN 201410756060 A CN201410756060 A CN 201410756060A CN 104479698 B CN104479698 B CN 104479698B
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- Prior art keywords
- coke
- steam
- quenching
- dry
- overhaul
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
Abstract
The present invention relates to protect product method for steam outside a kind of dry coke quenching, outside a kind of dry coke quenching being applied to dry quenching system field, protect product method for steam.The one that the present invention provides can promote steam quality with the effectively save energy, improves and protects product method for steam outside the dry coke quenching of dry coke quenching steam guarantor's product time, including following step: a, judges that dry coke quenching equipment overhauls situation；B, before maintenance starts, according to maintenance situation, adjust coke dry quenching furnace material position, promote dry coke quenching operating mode to most preferably；C, at the maintenance initial stage, if overhaul of the equipments situation is the burnt system overhaul of dress and coke discharging system is overhauled simultaneously, then gradually reduce bypass flow, until Close All；D, maintenance mid-term, be gradually reduced warm water flow；E, maintenance latter stage, interval open coke dry quenching furnace bell.Ensureing in the case of steam quality, delaying coke dry quenching furnace outlet temperature, it is ensured that the minimum steam needs of lower procedure turbine LP rotors, reducing steam the diffusing of a large amount of steam after de-connecting, the saving energy.
Description
Technical field
The present invention relates to protect product method, a kind of dry coke quenching being applied to dry quenching system field for steam outside a kind of dry coke quenching
Outer for steam guarantor's product method.
Background technology
Dry coke quenching is as a kind of novel quenching mode, owing to the advantages such as energy-saving and environmental protection, raising coke quality are applied to vast steel
Ferrum joint enterprise and large-scale coal chemical enterprise.Current domestic most dry coke quenching enterprises are all based on CDQ, and wet quenching is standby
Quenching pattern.Protect product for steam outside dry coke quenching to refer to, in the case of ensureing steam quality and equipment safety, maintain as far as possible or prolong
The speed that slow coke dry quenching furnace outlet temperature and drum pressure decline, it is ensured that the minimum steam needs of lower procedure turbine LP rotors, protects
Card dry coke quenching steam and Steam Turbine not suspension, be possible not only to preferably promote to produce steadily propelling, also can reduce steam simultaneously and exist
De-connect diffusing of rear a large amount of steam, save the energy.But in the middle of actual production, owing to front end is produced and dress Jiao by coke furnace system
Systematic influence, rear end are affected by coke discharging and coke transport system, and especially coke transport system is that single system impact is bigger, at maintenance or equipment
Under failure condition, coke dry quenching boiler steam quality often can not be guaranteed, along with equipment processes the prolongation of time, dry coke quenching steam
Quality will progressively deteriorate, to such an extent as to the normal production of downstream steam turbine power generation can not be met, dry coke quenching steam has to take to break
Net de-connects operation.After steam de-connects, it is impossible to the steam meeting production requirement only diffuses, cause a large amount of waste of steam.Therefore existing
Have in technology and also do not have one can promote steam quality with the effectively save energy, improve dry coke quenching steam and protect the dry coke quenching of product time
Outer for steam guarantor's product method.
Summary of the invention
The technical problem to be solved is to provide one can promote steam quality with the effectively save energy, improves dry coke quenching
Product method is protected for steam, including following step outside the dry coke quenching of steam guarantor's product time:
A, judge dry coke quenching equipment overhaul situation；
B, before maintenance starts, according to maintenance situation, adjust coke dry quenching furnace material position, if overhaul of the equipments situation is the burnt system overhaul of dress
Overhaul with coke discharging system simultaneously, then coke dry quenching furnace material position is maintained at high charge level；If overhaul of the equipments situation is coke discharging system overhaul,
Then coke dry quenching furnace material position is maintained at low material position；If overhaul of the equipments situation is dress Jiao's system overhaul, then coke dry quenching furnace material position is maintained at high material
Position.
C, at the maintenance initial stage, gradually reduce the intake of cold cycle gas, until stopping being passed through of cold cycle gas；If
Overhaul of the equipments situation is the burnt system overhaul of dress, then coke discharge amount is maintained at 25t/h to 35t/h.
D, maintenance mid-term, be gradually reduced warm water flow, until warm water flow reduce to zero；If overhaul of the equipments situation is dress Jiao
System overhaul, then be interrupted coke discharging；If overhaul of the equipments situation is coke discharging system overhaul, then it is interrupted and loads coke.
E, maintenance latter stage, interval open coke dry quenching furnace bell.
Further, in b step, starting 3 to 5 hours away from maintenance when, gradually accelerate to load red Jiao and discharge
The speed of cold Jiao, CO and the H2 content that accumulation is sufficient.
Further, in b step, it is gradually lowered circulating fan rotating speed and is down to about 800 revs/min by 1000 revs/min.
Further, in Step d, progressively close off continuous blowdown system of boiler valve and periodical blowdown valve.
Further, circulating fan rotating speed again it is gradually lowered to 500 revs/min.
Further, in Step d, liquid level of steam drum fluctuation range is made to maintain-10mm extremely with reflux inlet regulation liquid level of steam drum
Within+10mm.
Further, in Step d, utilize the chamber pressure force regulating valve that prestores to adjust and prestore chamber pressure, make to prestore chamber pressure according to
Control at-50Pa to+50Pa.
Further, in Step d, main steam pressure regulation valve regulation drum pressure is utilized to make drum pressure fluctuation range tie up
Hold within 4.10Mpa to 4.30Mpa.
In step e, after opening bell, making the bell distance range from water seal face is 10cm to 20cm,
The invention has the beneficial effects as follows: due to the method that have employed the present invention, in the case of ensureing steam quality and equipment safety,
Maintain as far as possible or delay the speed that coke dry quenching furnace outlet temperature and drum pressure decline, it is ensured that lower procedure turbine LP rotors is
Low steam needs, it is ensured that dry coke quenching steam and Steam Turbine not suspension, is possible not only to preferably promote to produce steadily propelling, simultaneously
Also can reduce steam the diffusing of a large amount of steam after de-connecting, save the energy.Dry quenching system loads under maintenance or abnormal conditions
System cannot fill Jiao, coke discharging system cannot coke discharging or system i.e. cannot fill burnt and also cannot coke discharging time, the method using the present invention,
Ensure dry coke quenching steam quality the most for a long time, thus ensure that downstream steam turbine operation does not get rid of net.
Detailed description of the invention
Product method is protected for steam, including following step outside dry coke quenching of the present invention:
A, judge dry coke quenching equipment overhaul situation；
B, before maintenance starts according to maintenance situation, adjust coke dry quenching furnace material position, if the overhaul of the equipments situation burnt system overhaul that is dress and
Coke discharging system overhaul, then be maintained at high charge level by coke dry quenching furnace material position；If overhaul of the equipments situation is coke discharging system overhaul, the most dry put out
Furnace charge position is maintained at low material position；If overhaul of the equipments situation is dress Jiao's system overhaul, then coke dry quenching furnace material position is maintained at high charge level.Institute
Stating high charge level and refer to that coke dry quenching furnace can also load the material position of 1 stove to 2 stoves, described low material position refers to that coke dry quenching furnace also can load 4 to 5
The material position of stove.
C, at the maintenance initial stage, if overhaul of the equipments situation is the burnt system overhaul of dress and coke discharging system is overhauled simultaneously, gradually reduce low temperature
The intake of recyclegas, until stopping being passed through of cold cycle gas.After stopping dress Jiao and coke discharging, flammable in recyclegas
Composition CO, H2Can gradually reduce, utilize burn combustible gas, slow down coke dry quenching furnace outlet temperature.
D, maintenance mid-term, be gradually reduced warm water flow, until warm water flow reduce to zero；As time goes on, coke dry quenching furnace
Outlet temperature will reduce, and dry coke quenching steam quality is by continuous decrease.If overhaul of the equipments situation is dress Jiao's system overhaul, then adopt
Take interruption coke discharging；If overhaul of the equipments situation is coke discharging system overhaul, then take to be interrupted loading coke, utilize dress burnt and coke discharging product
Raw heat can effectively slow down coke dry quenching furnace outlet temperature and decline.
E, maintenance latter stage, interval open coke dry quenching furnace bell.Ensure to prestore room negative pressure, imports certain air capacity, and burning surface is burnt
Coke powder at charcoal and one-time dedusting, slows down coke dry quenching furnace outlet temperature and main steam temperature.In order to ensure that system runs safety, interval
Open coke dry quenching furnace bell to carry out in the case of spot check personnel permit.
In b step, before starting away from maintenance when of 3 to 5 hours, gradually accelerate load red Jiao and discharge cold burnt speed,
Make T3 mean temperature reach 250 DEG C, T4 reach 350 DEG C, T6 reach 960 DEG C, main steam temperature reach about 480 DEG C,
Recyclegas combustible component is to the upper limit, i.e. H2 reaches 3%, and CO reaches 6%, so operating mode is adjusted to most preferably before maintenance, can be dry
Accumulate enough heats in putting out stove, can effectively make up maintenance and start the deficiency of rear heat.
In b step, it is gradually lowered circulating fan rotating speed to 800 revs/min.So can reduce the dissipation of furnace heat.
In Step d, progressively close off continuous blowdown system of boiler valve and periodical blowdown valve.After coke dry quenching furnace outlet temperature declines, boiler steams
Amount of sending out, by also reducing therewith, now progressively closes off continuous blowdown system of boiler valve and periodical blowdown valve can increase boiler capacity.
In Step d, it is gradually lowered circulating fan rotating speed to the slow-speed of revolution to 500 revs/min, to slow down under coke dry quenching furnace outlet temperature
Reduction of speed degree.
During declining in coke dry quenching furnace outlet temperature, liquid level of steam drum, drum pressure and the chamber pressure that prestores are it would appear that bigger
Fluctuation, therefore in Step d, make liquid level of steam drum fluctuation range maintain-10mm to+10mm with reflux inlet regulation liquid level of steam drum
Within.
In Step d, utilize the chamber pressure force regulating valve that prestores to adjust the chamber pressure that prestores, make to prestore chamber pressure according to controlling at-50Pa
To+50Pa.In Step d, main steam pressure regulation valve regulation drum pressure is utilized to make drum pressure fluctuation range maintain
Within 4.10Mpa to 4.30Mpa.
In order to more effectively delay coke dry quenching furnace outlet temperature decrease speed, in step e, after opening bell, make bell from water seal
The distance range in face is 15cm to 20cm.
Claims (9)
1. protect product method for steam outside dry coke quenching, it is characterised in that: include following step:
A, judge dry coke quenching equipment overhaul situation；
B, before maintenance starts, according to maintenance situation, adjust coke dry quenching furnace material position, if overhaul of the equipments situation is the burnt system of dress and row
Burnt system is overhauled simultaneously, then coke dry quenching furnace material position is maintained at high charge level；If overhaul of the equipments situation is coke discharging system overhaul, then do
Put out furnace charge position and be maintained at low material position；If overhaul of the equipments situation is dress Jiao's system overhaul, then coke dry quenching furnace material position is maintained at high charge level；
C, at the maintenance initial stage, gradually reduce the intake of cold cycle gas, until stopping being passed through of cold cycle gas, if
Overhaul of the equipments situation is the burnt system overhaul of dress, and coke discharge amount is maintained at 25t/h to 35t/h；
D, maintenance mid-term, be gradually reduced warm water flow, until warm water flow reduce to zero；If overhaul of the equipments situation is dress Jiao
System overhaul, then be interrupted coke discharging；If overhaul of the equipments situation is coke discharging system overhaul, then it is interrupted and loads coke；
E, maintenance latter stage, interval open coke dry quenching furnace bell.
2. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in b step, opening away from maintenance
The when of beginning 3 hours to 5 hours, gradually accelerate load red Jiao and discharge the speed of cold Jiao, CO and H that accumulation is sufficient2。
3. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in b step, it is gradually lowered and follows
Ring rotation speed of fan is down to 800 revs/min by 1000 revs/min.
4. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in Step d, progressively close off pot
Stove continuous blowdown valve and periodical blowdown valve.
5. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in Step d, the most gradually drop
Low circulating fan rotating speed is to 500 revs/min.
6. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in Step d, adjust with reflux inlet
Joint liquid level of steam drum makes liquid level of steam drum fluctuation range maintain in-10mm to+10mm.
7. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in Step d, utilize the room that prestores
Pressure-regulating valve adjusts and prestores chamber pressure, and the chamber pressure that makes to prestore controls at-50Pa to+50Pa.
8. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in Step d, utilize main steam
Pressure-regulating valve regulation drum pressure makes drum pressure fluctuation range maintain 4.10Mpa to 4.30Mpa.
9. protect product method for steam outside dry coke quenching as claimed in claim 1, it is characterised in that: in step e, after opening bell,
Making the bell distance range from water seal face is 10cm to 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756060.6A CN104479698B (en) | 2014-12-10 | 2014-12-10 | Product method is protected for steam outside dry coke quenching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756060.6A CN104479698B (en) | 2014-12-10 | 2014-12-10 | Product method is protected for steam outside dry coke quenching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104479698A CN104479698A (en) | 2015-04-01 |
| CN104479698B true CN104479698B (en) | 2016-11-30 |
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| CN201410756060.6A Active CN104479698B (en) | 2014-12-10 | 2014-12-10 | Product method is protected for steam outside dry coke quenching |
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| CN112780364B (en) * | 2021-01-19 | 2022-11-25 | 山西太钢不锈钢股份有限公司 | Method for prolonging running time of dry quenching steam turbine generator |
| CN113322086B (en) * | 2021-06-29 | 2022-05-03 | 攀钢集团西昌钢钒有限公司 | Time delay method for controlling quality of externally supplied steam of dry quenching in sections |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59145280A (en) * | 1983-02-07 | 1984-08-20 | Kawasaki Steel Corp | Controlling hydrogen concentration in circulating gas in dry process coke quencher |
| CN101665703B (en) * | 2008-09-01 | 2012-07-18 | 鞍钢股份有限公司 | Method for continuous coke discharge operation of coke dry quenching system |
| CN101955777A (en) * | 2010-09-16 | 2011-01-26 | 南京钢铁股份有限公司 | Method for keeping stable coke dry quenching gas circulation system after pipe explosion of heat pipe exchanger and device thereof |
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