CN103088279B - 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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- CN103088279B CN103088279B CN201310029023.0A CN201310029023A CN103088279B CN 103088279 B CN103088279 B CN 103088279B CN 201310029023 A CN201310029023 A CN 201310029023A CN 103088279 B CN103088279 B CN 103088279B
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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, belong to and have 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 within the scope of 3900-4100KCal.Background technology adopts the pot galvanize have naked light section and improve Sendzimir method hot dip galvanizing process to produce line, owing to there is no online caloric power of gas detector, for caloric power of gas, fluctuation cannot be known in time, causes furnace atmosphere uncontrollable, occur that zinc layer adhesion is inadequate, 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 are fluctuateed and are regulated the technical ability of heater parameters 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, the problems referred to above that exist in solution 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, on coal gas main pipeline, add a caloric power of gas detector, be called for short caloric value instrument, calorific value detects numerical value and by PLC, passes on the HMI interface of technological operation chamber industrial computer; Operative employee monitors that caloric power of gas changes, and according to calorific value variation range, regulates empty coal scale-up factor λ; Caloric value instrument is carried out to periodic calibrating, and the demarcation cycle is one week; Described according to 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 is 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 be greater than 3600KCal, while being 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 is when being more than or equal to 3500KCal, being less than or equal to 3600KCal, 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.
Dilution air temperature is controlled at 700-750 ℃, and this temperature is high, improves empty coal scale-up factor λ, and raising scope is≤0.1; If low, reduce empty coal scale-up factor λ, reduction scope is≤0.1.
Described coal gas is coke-oven gas, and 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 belt steel surface oxidation, will affect zinc-plated effect of later stage.Therefore furnace atmosphere is had relatively high expectations, can not occur oxidizing atmosphere.Therefore principle of work of the present invention be when coke-oven gas calorific value unstable, there is larger fluctuation, and during lower than normal work 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: according to caloric power of gas, can determine whether and meet working condition determine whether stop, drive; Can understand in time the instant calorific value of producing coke-oven gas used, according to calorific value numerical value, judge production stability; When dezincify situation appears in production, can judge the soonest, most effectively the reason that produces dezincify; According to different calorific value numerical value, adopt different adjustment coefficients, both required to reach and produced required heat supply, reduce again or avoid the generation of Zinc Scaling unacceptable product.
accompanying drawing explanation,
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, is evenly divided into Wu Ge district successively according to band steel traffic direction, 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 mono-:
When caloric power of gas is within the scope of 3700-3900KCal,
1, production-line technique operative employee, by the HMI main operation interface in industrial computer, observes instant caloric power of gas numerical value;
During 2, when finding that caloric power of gas fluctuation is violent, and 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 is all made as 0.8, and naked light section A district remains unchanged;
4, air, gas flow ratio, carry out automatic mixing according to actual temperature in stove according to 0.8 parameter setting.
Embodiment bis-:
When caloric power of gas be greater than 3600KCal, while being less than or equal within the scope of 3700KCal,
1, production-line technique operative employee, by the HMI main operation interface in industrial computer, observes instant caloric power of gas numerical value;
During 2, when finding that caloric power of gas fluctuation is violent, and lower than 3700KCal, open each district's air, gas flow adjustment interface, regulate air, gas flow proportioning;
3, 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 regulates 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, now fire box temperature span of control is between 1100-1200 ℃.
Embodiment tri-:
When caloric power of gas be more than or equal to 3500KCal, while being less than or equal within the scope of 3600KCal;
1, production-line technique operative employee, by HMI main operation interface in industrial computer, observes instant caloric power of gas numerical value;
During 2, when finding that caloric power of gas fluctuation is violent, and lower than 3600KCal, open each district's air, gas flow adjustment interface, regulate air, gas flow proportioning;
3, 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 regulates 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, now fire box temperature span of control is 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 guaranteeing that the stability of pot galvanize quality product has very large effect.Preferably resolve the bottleneck problem that restriction quality product promotes, quality product is obviously improved and is stable, and the ratio of first-grade products improves month by month.
Claims (3)
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 coal gas main pipeline, is called for short caloric value instrument, and calorific value detects numerical value and by PLC, passes on the HMI interface of technological operation chamber industrial computer; Operative employee monitors that caloric power of gas changes, and according to calorific value variation range, regulates empty coal scale-up factor λ; Caloric value instrument is carried out to periodic calibrating, and the demarcation cycle is one week; Described according to 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 is 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 be greater than 3600KCal, while being 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 is when being more than or equal to 3500KCal, being less than or equal to 3600KCal, 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;
Described process furnace naked light section, is evenly divided into Wu Ge district successively according to band steel traffic direction, 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 within the scope of 3700-3900KCal,
(1) by the HMI main operation interface in industrial computer, observe instant caloric power of gas numerical value;
(2) during when finding that caloric power of gas fluctuation is violent, and 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 is all made as 0.8, and naked light section A district remains unchanged;
(4) air, gas flow ratio, carry out automatic mixing according to actual temperature in stove according to 0.8 parameter setting;
When caloric power of gas be greater than 3600KCal, while being less than or equal within the scope of 3700KCal,
(1) by the HMI main operation interface in industrial computer, observe instant caloric power of gas numerical value;
(2) during when finding that caloric power of gas fluctuation is violent, and lower than 3700KCal, open each district's air, gas flow adjustment interface, regulate air, gas flow proportioning;
(3) 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 regulates 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) now fire box temperature span of control is between 1100-1200 ℃;
When caloric power of gas be more than or equal to 3500KCal, while being less than or equal within the scope of 3600KCal;
(1) by HMI main operation interface in industrial computer, observe instant caloric power of gas numerical value;
(2) during when finding that caloric power of gas fluctuation is violent, and lower than 3600KCal, open each district's air, gas flow adjustment interface, regulate air, gas flow proportioning;
(3) 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 regulates 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) now fire box temperature span of control is between 1000-1100 ℃.
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 dilution air temperature is controlled at 700-750 ℃, and this temperature is high, improves empty coal scale-up factor λ, and raising scope is≤0.1; If low, reduce empty coal scale-up factor λ, 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 work calorific value is 3900-4100KCal.
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| CN105256230B (en) * | 2015-11-25 | 2017-01-25 | 武汉钢铁(集团)公司 | 450Mpa-grade thick gauge hot-dip galvanized steel and production method thereof |
| CN105238999B (en) * | 2015-11-25 | 2017-01-25 | 武汉钢铁(集团)公司 | 350MPa grade thick standard 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 |
|---|---|---|---|---|
| CN101482732A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | Method for stably controlling calorific value of mixed gas |
| CN102453792A (en) * | 2010-10-26 | 2012-05-16 | 宝山钢铁股份有限公司 | Furnace pressure control method and control equipment for continuous annealing furnace |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482732A (en) * | 2008-01-08 | 2009-07-15 | 鞍钢股份有限公司 | Method for stably controlling calorific value of mixed gas |
| CN102453792A (en) * | 2010-10-26 | 2012-05-16 | 宝山钢铁股份有限公司 | Furnace pressure control method and control equipment for continuous annealing furnace |
Non-Patent Citations (2)
| Title |
|---|
| 热镀锌退火炉热工工艺分析;贾丽娣等;《鞍钢技术》;20051231(第2期);第24-26页 * |
| 贾丽娣等.热镀锌退火炉热工工艺分析.《鞍钢技术》.2005,(第2期), |
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Granted publication date: 20141015 Termination date: 20170125 |