CN103088279A - Improved gas caloricity abnormal control method of sendzimir method hot galvanizing heating furnace - Google Patents
Improved gas caloricity abnormal control method of sendzimir method hot galvanizing heating furnace Download PDFInfo
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- CN103088279A CN103088279A CN2013100290230A CN201310029023A CN103088279A CN 103088279 A CN103088279 A CN 103088279A CN 2013100290230 A CN2013100290230 A CN 2013100290230A CN 201310029023 A CN201310029023 A CN 201310029023A CN 103088279 A CN103088279 A CN 103088279A
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Abstract
The invention relates to an improved gas caloricity abnormal control method of a sendzimir method hot galvanizing heating furnace, and belongs to the technical field of hot galvanizing of heating furnaces of naked fire sections. The technical scheme is as follows: a gas caloricity detecting instrument ( a caloricity instrument for short) is added on a gas main pipeline, and the caloricity detecting value is passed on the HMI (human machine interface) interface of a work control machine of a technological operation chamber through a PLC (programmable logic controller); and an operator monitors the variation of the gas caloricity, and the empty coal ratio factor lambda is adjusted according to the variation range of the caloricity. The improved gas caloricity abnormal control method provided by the invention has the advantages and effects that whether working condition is met can be judged according to the gas caloricity, so as to judge whether to start or stop a car; the instant caloricity of coke oven gas for production is comprehended in time, and the manufacture stability is judged according to a caloricity value; and when the production is subjected to a dezincing condition, the improved gas caloricity abnormal control method is a reason which can fastest effectively judge the generation reason of dezincing, the different regulation factors are adopted according to different caloricity values, the heat supply required by production is achieved according to the requirement, and the generation of unacceptable products subjected to zinc layer stripping is reduced or avoided.
Description
Technical field
The present invention relates to a kind of improvement Sendzimir method hot galvanizing heating furnace caloric power of gas and extremely adjust method, belonging to has the process furnace of naked light section Hot Galvanizing Technology field.
Background technology
At present, for improvement Sendzimir method galvanization production line, process furnace naked light section furnace atmosphere directly affects zinc layer adhesion.Therefore require the calorific value stability of inflammable gas in stove to want high, calorific value is controlled in the 3900-4100KCal scope.Background technology adopts the pot galvanize with naked light section ground improvement Sendzimir method hot dip galvanizing process to produce line, owing to there is no online caloric power of gas detector, fluctuation can't in time be known for caloric power of gas, causes furnace atmosphere uncontrollable, zinc layer adhesion appears inadequate, the dezincify situation.
Summary of the invention
The object of the invention is to provide a kind of improvement Sendzimir method hot galvanizing heating furnace caloric power of gas and extremely adjusts method, in caloric power of gas fluctuation situation, operator's technical ability that heater parameters is regulated in fluctuation according to caloric power of gas, by the empty coal scale-up factor of manual regulation process furnace λ, both guaranteed the normal required heat requirement of producing, artificially building again in stove is reducing atmosphere, reduces zinc-plated Zinc Scaling, solves the problems referred to above that exist in background technology.
Technical scheme of the present invention is: a kind of improvement Sendzimir method hot galvanizing heating furnace caloric power of gas is adjusted method extremely, add a caloric power of gas detector on the coal gas main pipe line, be called for short caloric value instrument, calorific value detects numerical value and passes on the HMI interface of technological operation chamber industrial computer by PLC; The operative employee monitors that caloric power of gas changes, and according to the calorific value variation range, regulates empty coal scale-up factor λ; Caloric value instrument is carried out periodic calibrating, and the demarcation cycle is a week; Described according to the calorific value variation range, regulate empty coal scale-up factor λ, comprise following processing step:
1. when caloric power of gas 〉=3900KCal, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.9-0.98, and in stove, temperature is 1200-1300 ℃;
2. when caloric power of gas during at 3700-3900KCal, the empty coal scale-up factor λ of process furnace naked light section is 0.8, and in stove, temperature is 1100-1200 ℃;
3. when caloric power of gas during greater than 3600KCal, less than or equal to 3700KCal, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.70-0.75;
4. when caloric power of gas more than or equal to 3500KCal, less than or equal to 3600KCal the time, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.65-0.70;
5. the gas flow of process furnace naked light section is controlled at 750-800Nm3/h.
The dilution air temperature is controlled at 700-750 ℃, and this temperature is high, improves empty coal scale-up factor λ, and the raising scope is≤0.1; If low, reduce empty coal scale-up factor λ, the reduction scope is≤0.1.
Described coal gas is coke-oven gas, and the work calorific value is 3900-4100KCal.
Because improvement Sendzimir method process furnace naked light section combustion atmosphere directly contacts with the strip, if there is the belt steel surface oxidation, will affect zinc-plated effect of later stage.Therefore furnace atmosphere is had relatively high expectations, oxidizing atmosphere can not occur.Therefore principle of work of the present invention be when the coke-oven gas calorific value unstable, appearance is than great fluctuation process, and during lower than the normal operation calorific value, by adjusting empty coal scale-up factor λ, change the air, the gas flow ratio that pass into improvement Sendzimir method process furnace naked light section, naked light section furnace atmosphere is always worked in stable reducing atmosphere, belt steel surface oxidation situation can not occur, reduce the generation of Zinc Scaling unacceptable product.
Advantage of the present invention and effect: can determine whether according to caloric power of gas and satisfy working condition determine whether stop, drive; Can in time understand the instant calorific value of producing coke-oven gas used, judge production stability according to calorific value numerical value; When the dezincify situation appears in production, can judge the fastest, most effectively the reason that produces dezincify; Adopt different adjustment coefficients according to different calorific value numerical value, both required to reach and produced required heat supply, reduce again or avoid the generation of Zinc Scaling unacceptable product.
Description of drawings,
Fig. 1 is embodiment of the present invention heating-furnace naked light segment structure schematic diagram;
In figure: 1-furnace shell, 2-naked light section A district, 3-naked light section B district, 4-naked light section C district, 5-naked light section D district, 6-naked light section E district, 7-band steel traffic direction, 8-combustion exhaust traffic direction.
Embodiment
The present invention will be further described by the following examples.
With reference to accompanying drawing 1, described process furnace naked light section evenly is divided into five districts successively according to band steel traffic direction, is respectively: naked light section A district, naked light section B district, naked light section C district, naked light section D district, naked light section E district.
Embodiment one:
When caloric power of gas is in the 3700-3900KCal scope,
1, production-line technique operative employee by the HMI main operation interface on industrial computer, observes instant caloric power of gas numerical value;
2, when finding that the caloric power of gas fluctuation is violent, and during lower than 3900KCal, open sky coal scale-up factor setting operation interface, prepare to revise the empty coal scale-up factor λ set(ting)value of process furnace naked light section;
3, the empty coal scale-up factor λ in naked light section B district, naked light section C district, naked light section D district, naked light section E district all is made as 0.8, and naked light section A district remains unchanged;
4, air, gas flow ratio are carried out automatic mixing according to actual temperature in stove according to 0.8 parameter that sets.
Embodiment two:
When caloric power of gas greater than 3600KCal, less than or equal to the 3700KCal scope in the time,
1, the production-line technique operative employee by the HMI main operation interface on industrial computer, observes instant caloric power of gas numerical value;
2, when finding that the caloric power of gas fluctuation is violent, and during lower than 3700KCal, open and respectively distinguish air, gas flow adjustment interface, regulate air, gas flow proportioning;
3, the gas flow regulation range is 750-770Nm3/h; And regulate air flow quantity according to the empty coal scale-up factor λ under this thermal value range;
4, air flow quantity is regulated according to following empty coal scale-up factor, naked light section B district 0.75, naked light section C district 0.74, naked light section D district 0.72, naked light section E district 0.70, and naked light section A district remains unchanged;
5, this moment, the fire box temperature span of control was between 1100-1200 ℃.
Embodiment three:
When caloric power of gas is in more than or equal to 3500KCal, less than or equal to the 3600KCal scope;
1, the production-line technique operative employee by HMI main operation interface on industrial computer, observes instant caloric power of gas numerical value;
2, when finding that the caloric power of gas fluctuation is violent, and during lower than 3600KCal, open and respectively distinguish air, gas flow adjustment interface, regulate air, gas flow proportioning;
3, the gas flow regulation range is 770-800Nm3/h; And regulate air flow quantity according to the empty coal scale-up factor λ under this thermal value range;
4, air flow quantity is regulated according to following empty coal scale-up factor, naked light section B district 0.7, naked light section C district 0.68, naked light section D district 0.67, naked light section E district 0.65, and naked light section A district remains unchanged;
5, this moment, the fire box temperature span of control was between 1000-1100 ℃.
After the invention process, the fluctuation of uncertain caloric power of gas can be dropped to the impact of quality product minimum, for the stability that guarantees the pot galvanize quality product has very large effect.Preferably resolve the bottleneck problem that the restriction quality product promotes, quality product is obviously improved and is stable, and the ratio of first-grade products improves month by month.
Claims (4)
1. improvement Sendzimir method hot galvanizing heating furnace caloric power of gas is adjusted method extremely, it is characterized in that adding a caloric power of gas detector on the coal gas main pipe line, is called for short caloric value instrument, and calorific value detects numerical value and passes on the HMI interface of technological operation chamber industrial computer by PLC; The operative employee monitors that caloric power of gas changes, and according to the calorific value variation range, regulates empty coal scale-up factor λ; Caloric value instrument is carried out periodic calibrating, and the demarcation cycle is a week; Described according to the calorific value variation range, regulate empty coal scale-up factor λ, comprise following processing step:
1. when caloric power of gas 〉=3900KCal, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.9-0.98, and in stove, temperature is 1200-1300 ℃;
2. when caloric power of gas during at 3700-3900KCal, the empty coal scale-up factor λ of process furnace naked light section is 0.8, and in stove, temperature is 1100-1200 ℃;
3. when caloric power of gas during greater than 3600KCal, less than or equal to 3700KCal, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.70-0.75;
4. when caloric power of gas more than or equal to 3500KCal, less than or equal to 3600KCal the time, the empty coal scale-up factor λ span of control of process furnace naked light section is 0.65-0.70;
5. the gas flow of process furnace naked light section is controlled at 750-800Nm3/h.
2. improvement Sendzimir method hot galvanizing heating furnace caloric power of gas according to claim 1 is adjusted method extremely, it is characterized in that the dilution air temperature is controlled at 700-750 ℃, and this temperature is high, improves empty coal scale-up factor λ, and the raising scope is≤0.1; If low, reduce empty coal scale-up factor λ, the reduction scope is≤0.1.
3. improvement Sendzimir method hot galvanizing heating furnace caloric power of gas according to claim 1 and 2 is adjusted method extremely, it is characterized in that described coal gas is coke-oven gas, and the work calorific value is 3900-4100KCal.
4. improvement Sendzimir method hot galvanizing heating furnace caloric power of gas according to claim 1 and 2 is adjusted method extremely, it is characterized in that, described process furnace naked light section, evenly be divided into successively five districts according to band steel traffic direction, be respectively: naked light section A district, naked light section B district, naked light section C district, naked light section D district, naked light section E district;
When caloric power of gas is in the 3700-3900KCal scope,
⑴ observe instant caloric power of gas numerical value by the HMI main operation interface on industrial computer;
⑵ when finding that the caloric power of gas fluctuation is violent, and during lower than 3900KCal, opens sky coal scale-up factor setting operation interface, prepares to revise the empty coal scale-up factor λ set(ting)value of process furnace naked light section;
⑶ the empty coal scale-up factor λ in naked light section B district, naked light section C district, naked light section D district, naked light section E district all is made as 0.8, and naked light section A district remains unchanged;
⑷ air, gas flow ratio are carried out automatic mixing according to actual temperature in stove according to 0.8 parameter that sets;
When caloric power of gas greater than 3600KCal, less than or equal to the 3700KCal scope in the time,
⑴ observe instant caloric power of gas numerical value by the HMI main operation interface on industrial computer;
⑵ when finding that the caloric power of gas fluctuation is violent, and during lower than 3700KCal, open and respectively distinguish air, gas flow adjustment interface, regulates air, gas flow proportioning;
⑶ gas flow regulation range is 750-770Nm3/h; And regulate air flow quantity according to the empty coal scale-up factor λ under this thermal value range;
⑷ air flow quantity is regulated according to following empty coal scale-up factor, naked light section B district 0.75, naked light section C district 0.74, naked light section D district 0.72, naked light section E district 0.70, and naked light section A district remains unchanged;
⑸ fire box temperature span of control this moment is between 1100-1200 ℃;
When caloric power of gas is in more than or equal to 3500KCal, less than or equal to the 3600KCal scope;
⑴ observe instant caloric power of gas numerical value by HMI main operation interface on industrial computer;
⑵ when finding that the caloric power of gas fluctuation is violent, and during lower than 3600KCal, open and respectively distinguish air, gas flow adjustment interface, regulates air, gas flow proportioning;
⑶ gas flow regulation range is 770-800Nm3/h; And regulate air flow quantity according to the empty coal scale-up factor λ under this thermal value range;
⑷ air flow quantity is regulated according to following empty coal scale-up factor, naked light section B district 0.7, naked light section C district 0.68, naked light section D district 0.67, naked light section E district 0.65, and naked light section A district remains unchanged;
⑸ fire box temperature span of control this moment is between 1000-1100 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238999A (en) * | 2015-11-25 | 2016-01-13 | 武汉钢铁(集团)公司 | 350MPa grade thick standard hot-dip galvanized steel and production method thereof |
| CN105256230A (en) * | 2015-11-25 | 2016-01-20 | 武汉钢铁(集团)公司 | 450Mpa-grade thick gauge hot-dip galvanized steel and production method thereof |
| CN107740023A (en) * | 2017-09-28 | 2018-02-27 | 邯郸钢铁集团有限责任公司 | Use the improvement Sendzimir method hot galvanizing heating furnace control method of mixing source of the gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101482732A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | Mixed gas calorific value stabilization control method |
| CN102453792A (en) * | 2010-10-26 | 2012-05-16 | 宝山钢铁股份有限公司 | Method and equipment for controlling furnace pressure of continuous annealing furnace |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101482732A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | Mixed gas calorific value stabilization control method |
| CN102453792A (en) * | 2010-10-26 | 2012-05-16 | 宝山钢铁股份有限公司 | Method and equipment for controlling furnace pressure of continuous annealing furnace |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238999A (en) * | 2015-11-25 | 2016-01-13 | 武汉钢铁(集团)公司 | 350MPa grade thick standard hot-dip galvanized steel and production method thereof |
| CN105256230A (en) * | 2015-11-25 | 2016-01-20 | 武汉钢铁(集团)公司 | 450Mpa-grade thick gauge hot-dip galvanized steel and production method thereof |
| CN107740023A (en) * | 2017-09-28 | 2018-02-27 | 邯郸钢铁集团有限责任公司 | Use the improvement Sendzimir method hot galvanizing heating furnace control method of mixing source of the gas |
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Granted publication date: 20141015 Termination date: 20170125 |