CN101373067B - Method for controlling thermal storage combustion - Google Patents
Method for controlling thermal storage combustion Download PDFInfo
- Publication number
- CN101373067B CN101373067B CN200710045221A CN200710045221A CN101373067B CN 101373067 B CN101373067 B CN 101373067B CN 200710045221 A CN200710045221 A CN 200710045221A CN 200710045221 A CN200710045221 A CN 200710045221A CN 101373067 B CN101373067 B CN 101373067B
- Authority
- CN
- China
- Prior art keywords
- burner
- gas flow
- heat
- interval
- burners
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a regenerative combustion control method which comprises the following steps: (1) judging the number of burners; (2) calculating the minimum values of gas flow rate according to regenerative combustion burners with different logarithms through the formula, that is, the gas flow rate is more than or equal to the value obtained by the standard gas flow rate of the regenerative combustion burner divided by the adjusting rate and multiplied by the number of regenerative combustion burners in a certain segment, and then determining the gas flow rate intervals corresponding to the burner logarithms according to the minimum values; (3) confirming the current gas flow rate interval, so as to further decide the number of the burners which need to be correspondingly input; (4) completing at least one burning circle through the burners; (5) and judging again the gas flow rate interval, if the interval changes, carrying on the step (3); if not, confirming the input and exchange order of burners so as to ensure the uniformity of furnace temperature. Compared with prior art, the invention has the advantages of ensuring the safety of the regenerative combustion burners, increasing the regenerative combustion rate of the regenerative combustion burners, and achieving energy conservation.
Description
Technical field
The invention belongs to industrial thermal technology field, particularly the heat-accumulation combustion control method of heat-accumulating burner.
Background technology
Heat-accumulating burner makes media such as the accumulation of heat bead of splendid attire in high-temp waste gas in the stove and the heat storage tank or honeycomb ceramics carry out heat exchange by heat-accumulation combustion, enters the effect that reaches energy-conservation in the stove thereby allow cold air become high-temperature gas by heat storage medium again.
No. 2 stoves of Baosteel 2050 hot rollings are domestic first heavy slab heating furnaces that use heat-accumulating burner, this stove has used 22 heat-accumulating burners altogether in first bringing-up section and the second bringing-up section bottom, the minimum gas flow valve opening of its original each section is 5% (gas flow is less in this period), owing to do not consider the rated capacity and the minimal adjustment ratio thereof of each heat-accumulating burner, therefore easily cause the tempering danger when the low discharge heat-accumulation combustion, while Yin Wendu need often switch to conventional burning and cause heat storage efficiency to descend, and has influenced energy-saving effect.
Summary of the invention
The purpose of this invention is to provide a kind of heat-accumulation combustion control method, can also can guarantee temperature uniformity simultaneously in the safety and stability that guarantees that heat-accumulating burner burns under low discharge coal gas state.
Inventive concept: regulate than a kind of functional characteristic that is burner, be meant that burner can keep good fired state being not less than under the rated load of this ratio, during less than this ratio, the burner duty does not guarantee any.Because it is that unit controls that heating furnace has with the section, therefore, the inventive method is carried out the gas flow interval division in conjunction with the heat-accumulating burner logarithm: the specified gas flow (m of heat-accumulating burner in conjunction with the rated capacity and the adjusting ratio of heat-accumulating burner
3/ h) ÷ regulates heat-accumulating burner logarithm n in the ratio * section (the total logarithm of heat-accumulating burner in 0≤n≤section), thereby be divided into some each and every one gas flow intervals, carry out the control of staged heat-accumulation combustion with this, guarantee that each heat-accumulating burner keeps good fired state in it regulates than scope.
Technical scheme of the present invention specifically may further comprise the steps:
1) judges the heat-accumulating burner logarithm that drops at present;
2) according to formula: the specified gas flow (m of gas flow 〉=heat-accumulating burner
3/ h) ÷ regulates the interior heat-accumulating burner logarithm n of ratio * section (the interior total logarithm of heat-accumulating burner of 0≤n≤section) calculate the minimum of a value that gas flow is had to the heat-accumulating burner of corresponding different pairs the time, and according to this minimum of a value determine with the corresponding gas flow of burner logarithm interval be [gas flow (n), gas flow (n+1)); Regulate than a kind of functional characteristic that is burner, be meant that burner can keep good fired state being not less than under the rated load of this ratio, during less than this ratio, the duty of burner can not be guaranteed any.
3) determine the residing interval of current gas flow, so determine current should the corresponding burner logarithm that drops into;
4) the timing burner is finished at least one combustion period;
5) judge once more whether gas flow interval of living in changes (thereby determining whether the burner number in this section changes), if, execution in step 3), if not, thereby the input exchange sequence of determining burner guarantees temperature uniformity.
Preferably, certain hour is to guarantee the stable of gas flow interval at interval earlier before determining the burner number in the described step 3), and repeated execution of steps 2 again).
Preferably, described certain hour is 60～120 seconds.
The institute of above-mentioned heat-accumulation combustion control method will periodically carry out in steps.
The present invention compared with prior art has following beneficial effect:
1. the present invention can make heat-accumulating burner can guarantee the security of heat-accumulating burner thus in conjunction with the ability of burner own, adjusting than carrying out the staged heat-accumulation combustion when gas flow changes in section.
2. the present invention has improved the heat storage efficiency and the temperature uniformity of heat-accumulating burner to a great extent, has guaranteed energy-saving effect.
Description of drawings
Fig. 1 is that 6 sections burners in one embodiment of the present of invention are arranged schematic diagram.
Fig. 2 is a staged heat-accumulation combustion control flow schematic diagram of the present invention.
Fig. 3 is the staged heat-accumulation combustion schematic diagram of one embodiment of the present of invention.
The specific embodiment
With No. 2 stoves of Baosteel 2050 hot rollings is the embodiment of the invention for 6 sections, 6 pairs of the shared heat-accumulating burners of this section, section overall design heat capacity mixed gas 5508m
3/ h, the heat-accumulating burner technical parameter is as follows:
Burner ability: 8.83GJ/h
Mixed gas calorific value: 9614kJ/m3
Mixed gas flow: 918m
3/ h
Air mass flow: 2323m
3/ h
Air pressure: 2472Pa before the burner
Mixed gas pressure: 3738Pa before the burner
Commutating period: 40 seconds
The length of flame: 3505mm
Flame diameter: 30 ° of horn mouth: 800mm
Burner nozzle diameter: 571mm
Regulate than 8: 1
As shown in Figure 2, the heat-accumulation combustion control method comprises following steps:
1) judges the burner number;
2) according to formula: the specified gas flow (m of gas flow 〉=heat-accumulating burner
3/ h) ÷ regulates heat-accumulating burner logarithm n (0≤n≤6) in the ratio * section calculate the minimum of a value that gas flow is had to the heat-accumulating burner of corresponding different pairs the time, and according to this minimum of a value the definite and corresponding gas flow of burner logarithm interval;
As shown in Figure 1, compare as can be known according to the adjusting of burner, the 6th section the normal gas flow of each burner reversing combustion can not be less than 115m
3/ h, i.e. 918 ÷, 8 gained.Gas flow can not be less than 690m in the time of can pushing away to such an extent that 6 pairs of heat-accumulating burners normally drop in this section
3/ h, i.e. 115 * 6 gained.By that analogy, draw following interval as shown in table 1:
Table 1
| Coal gas amount interval (m 3/h) | [690，55 08] | [575，690 ) | [460，575 ) | [345，460 ) | [230，345 ) | [115，23 0) | [0，1 15) |
| Burner normally drops into |
6 | 5 | 4 | 3 | 2 | 1 | 0 |
3) determine the residing interval of current gas flow, so determine current should the corresponding burner logarithm that drops into; In the step 3) before definite burner number 60～120 seconds earlier at interval, repeated execution of steps 2 again).
4) burner is finished at least one combustion period;
5) judge once more whether gas flow interval of living in changes (thereby determining whether the burner number in this section changes), if, execution in step 3), if not, thereby the input exchange sequence of determining burner guarantees temperature uniformity.Then, periodically carry out above-mentioned heat-accumulation combustion control method the institute in steps.
As shown in figures 1 and 3, this example is interval carries out staged control in order with heat-accumulating burner: after first burner takes fire, every interval started next burner in 3 seconds, circulated successively until starting to last of this section burner, and each heat-accumulating burner was finished a combustion period 40 seconds.
Among Fig. 1, be beginning with 6A1 during normal heat-accumulation combustion, start 6A2 after 3 seconds at interval, till the 6A6, opposite 6B1 to 6B6 is the accumulation of heat state by that analogy.Enter the accumulation of heat state behind 6A1 burning one-period (40 seconds), 6B1 starts burning, starts 6B2 after 3 seconds at interval, by that analogy.
When the section gas flow is lower than 690m
3/ h, but more than or equal to 575m
3(section gas flow [575,690) m during/h
3The interval of/h), and (present embodiment is set at 120 seconds to gas flow at a heating model computing cycle, can be set at any number between 60～120 as the case may be) in when still not changing, regulating ratio with interior operate as normal in order to guarantee each burner that drops into, guarantee the needs of its combustion stability, according to stove inner segment flow interval division, in the coal gas interval the normal input logarithm of burner be 5 pairs as can be known, need close 6A1 and 6B1 this to heat-accumulating burner, and note close before this to burner separately the state at place be accumulation of heat or the burning.If in the next time period (80 seconds), the heat-accumulating burner in 6 sections drops into number and still is 5 pairs, then in order to guarantee the demand of temperature homogeneity in the stove, 6A1 and 6B1 drop into, but corresponding state is by the foundation that is recorded as in early stage, and close 6A2 and 6B2, by that analogy, vice versa.
The burner that present embodiment adopted, combustion period are 40 seconds, and in the inventive method implementation process, combustion period can change according to the difference of burner.
Claims (4)
1. heat-accumulation combustion control method is characterized in that may further comprise the steps:
1) judges the heat-accumulating burner logarithm;
2) according to formula: the specified gas flow ÷ of gas flow 〉=heat-accumulating burner regulates heat-accumulating burner logarithm n in the ratio * section, calculate the minimum of a value that gas flow is had to the heat-accumulating burner of corresponding different pairs the time, and according to this minimum of a value determine with the corresponding gas flow of burner logarithm interval be [gas flow (n), gas flow (n+1)), the logarithm of heat-accumulating burner in the n section of being wherein, the interior total logarithm of heat-accumulating burner of 0≤n≤section;
3) determine the residing interval of current gas flow, so determine current should the corresponding burner logarithm that drops into;
4) burner is finished at least one combustion period;
5) judge once more whether gas flow interval of living in changes, thereby determine whether the burner number in this section changes, if, execution in step 3), if not, thereby the input exchange sequence of determining burner guarantees temperature uniformity.
2. heat-accumulation combustion control method as claimed in claim 1 is characterized in that in the described step 3) before definite burner number earlier certain hour at interval, and repeated execution of steps 2 again).
3. heat-accumulation combustion control method as claimed in claim 2 is characterized in that described certain hour is 60～120 seconds.
4. heat-accumulation combustion control method as claimed in claim 3 is characterized in that periodically carrying out institute in steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710045221A CN101373067B (en) | 2007-08-24 | 2007-08-24 | Method for controlling thermal storage combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710045221A CN101373067B (en) | 2007-08-24 | 2007-08-24 | Method for controlling thermal storage combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101373067A CN101373067A (en) | 2009-02-25 |
| CN101373067B true CN101373067B (en) | 2010-05-19 |
Family
ID=40447364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710045221A Active CN101373067B (en) | 2007-08-24 | 2007-08-24 | Method for controlling thermal storage combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101373067B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636039A (en) * | 2011-02-11 | 2012-08-15 | 宝山钢铁股份有限公司 | Small flow control method for regenerative furnace |
| CN103256625B (en) * | 2012-02-16 | 2015-09-23 | 宝山钢铁股份有限公司 | Accumulation of heat pulse heating furnace method for controlling combustion |
| CN108828940A (en) * | 2018-06-01 | 2018-11-16 | 山东明泉新材料科技有限公司 | A kind of gasification furnace duty control method |
| CN112146088B (en) * | 2019-06-26 | 2022-08-16 | 宝山钢铁股份有限公司 | Flow control method for premixed burner of walking beam type heating furnace |
| CN111811257B (en) * | 2020-06-16 | 2021-12-21 | 首钢京唐钢铁联合有限责任公司 | Heating furnace combustion control method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427897A (en) * | 2001-01-17 | 2003-07-02 | 川崎制铁株式会社 | Heating furnace with regenerative burners and method of operating heating furnace |
-
2007
- 2007-08-24 CN CN200710045221A patent/CN101373067B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427897A (en) * | 2001-01-17 | 2003-07-02 | 川崎制铁株式会社 | Heating furnace with regenerative burners and method of operating heating furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101373067A (en) | 2009-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101373067B (en) | Method for controlling thermal storage combustion | |
| CN104456617A (en) | Control method of regenerative combustion device | |
| CN101196369A (en) | Heat accumulation-exchange type heating stove and heating method thereof | |
| CN112795716B (en) | Efficient and practical hot blast stove burning control method | |
| CN101338894A (en) | Low-calorie fuel dual prewarming and thermal storage type energy-saving boiler | |
| CN109140431B (en) | Ignition method of circulating fluidized bed boiler | |
| CN103868387A (en) | Heat accumulating type heat exchanger | |
| CN201778080U (en) | Heat accumulating type soaking pit furnace | |
| CN101261089A (en) | Cell-type car-type heating stove highly effective combustion system | |
| CN112665407A (en) | Hearth pressure control method for regenerative heating furnace | |
| CN201706903U (en) | Device used for controlling internal pressure of furnace and recovering heat energy of flue gas | |
| CN203052713U (en) | Efficient double thermal storage type heating furnace pulse combustion device | |
| CN202007261U (en) | Combusting system of coiling furnace | |
| JP3267140B2 (en) | Heating furnace, combustion control method thereof, and combustion control device | |
| CN201416888Y (en) | Pulse heat accumulating-type burner | |
| CN212988001U (en) | Combustion control system suitable for heat accumulating type smelting furnace | |
| CN201149427Y (en) | Heat-accumulation heat-exchange type heating furnace | |
| CN106766172A (en) | A kind of efficient energy-saving gas heating wall-hanging furnace | |
| CN202209788U (en) | Energy-saving and power-saving controlling means of hot-blast stove | |
| CN205137460U (en) | Automatic burning furnace is fired to heat accumulation formula of adjusting amount of wind | |
| CN1276433A (en) | High-air temp hot-blast stove for blast furnace | |
| CN107401923A (en) | Kiln burning efficiency control method | |
| CN201935557U (en) | Regenerative combustion furnace | |
| KR100406423B1 (en) | A combustion control method of hot stove in blast furnace process | |
| CN102636039A (en) | Small flow control method for regenerative furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |