CN203656971U - Residual oxygen analytic combustion control device of hot blast stove - Google Patents
Residual oxygen analytic combustion control device of hot blast stove Download PDFInfo
- Publication number
- CN203656971U CN203656971U CN201420023937.6U CN201420023937U CN203656971U CN 203656971 U CN203656971 U CN 203656971U CN 201420023937 U CN201420023937 U CN 201420023937U CN 203656971 U CN203656971 U CN 203656971U
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- Prior art keywords
- blast stove
- combustion
- residual oxygen
- hot blast
- air
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000001301 oxygen Substances 0.000 title claims abstract description 42
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 31
- 239000002912 waste gas Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003546 flue gas Substances 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model provides a residual oxygen analytic combustion control device of a hot blast stove, belongs to the technical field of the control equipment for the blast-furnace hot blast stoves and aims at implementing real-time automatic control on the combustion of the hot blast stove. The technical scheme adopted is as follows: an exhaust gas thermocouple, an arch crown thermocouple, a gas flowmeter and an air flowmeter of the residual oxygen analytic combustion control device are mounted on the hot blast stove, respectively, the signal output ends of the exhaust gas thermocouple, the arch crown thermocouple, the gas flowmeter and the air flowmeter are connected with the signal input end of a combustion controller by virtue of an isolator, a residual oxygen analyzer is mounted on the flue gas duct of the hot blast stove, and the signal output end of the residual oxygen analyzer is connected with the signal input end of the combustion controller. The residual oxygen analytic combustion control device realizes integration of residual oxygen analysis and hot blast stove combustion control, provides the optimal air-fuel ratio of the hot blast stove in a rapid burning period and provides the optimal air-fuel ratio cardinal number for next combustion process; meanwhile, the residual oxygen analytic combustion control device functions in regulating the air-fuel ratio in the combustion management period of the hot blast stove, and therefore, sufficient burning of gas is realized, the amount of the gas used by the hot blast stove is saved to an utmost extent, the combustion cost is reduced, and the environmental pollution is reduced.
Description
Technical field
The utility model relates to a kind of combustion control device of blast funnace hot blast stove, belongs to blast furnace and hot blast cupola combustion control appliance technical field.
Background technology
In the running of blast funnace hot blast stove, need to control effectively to the burning of hot-blast stove by combustion control device, at present, the main method of determining the initial air-fuel ratio of Combustion of Hot Air Furnace control device is to rely on a large amount of historical datas, determines the value of air-fuel ratio according to the corresponding relation of historical dome temperature and air-fuel ratio; Another kind method is to determine the value of the initial air-fuel ratio of this combustion process according to the empirical value that burnt in the past.These two kinds of methods all can not realize due to the complexity of hot-blast stove operating mode with experience error the real-time of Combustion of Hot Air Furnace and accurately control, and cause the problems such as security reliability is poor, gas consumption is high, emission reduction effect is poor.
Utility model content
Technical problem to be solved in the utility model is to provide the residual oxygen analytic combustion of a kind of hot-blast stove control device, this device is that residual oxygen analysis and Combustion of Hot Air Furnace control integration are integrated, the optimal air-fuel ratio of hot-blast stove in rapid burning period is provided, and provide optimal air-fuel ratio radix for lower first phase combustion process, play in the Combustion of Hot Air Furnace management phase effect of adjusting air-fuel ratio simultaneously, realizing coal gas fully burns, save to greatest extent hot-blast stove coal gas use amount, reduce burning cost, reduce environmental pollution.
The technical scheme solving the problems of the technologies described above is:
The residual oxygen analytic combustion of a kind of hot-blast stove control device, its formation comprises combustion controller, isolator, waste gas heat galvanic couple, vault thermocouple, gas regulator, air control valve, gas flow meter, mass air flow sensor, waste gas heat galvanic couple, vault thermocouple, gas flow meter, mass air flow sensor is arranged on respectively on hot-blast stove, their signal output part is connected with the signal input part of combustion controller by isolator, it has also increased residual oxygen analytical instrument, residual oxygen analytical instrument is arranged on the flue of hot-blast stove, the signal output part of residual oxygen analytical instrument is connected with the signal input part of combustion controller.
The residual oxygen analytic combustion of above-mentioned hot-blast stove control device, the gas regulator on the gas inlet pipe road of the signal output part of described combustion controller and hot-blast stove, the air control valve on air input channel are connected.
The beneficial effects of the utility model are:
The utility model is by residual oxygen analysis and the highly integrated integrated controller of Combustion of Hot Air Furnace control, index using the size of oxygen content in flue gas as control combustion efficiency, tentatively the setting value of oxygen content loop control unit is set in to mean value 0.2%, the value of feedback using oxygen content measured residual oxygen analytical instrument as loop control unit.Air-fuel ratio is set a datum mark in each hot stove stokehold, around this datum mark, according to the size of oxygen amount loop control unit output, air-fuel ratio datum mark is revised, result, as the setting value that participates in controlling air-fuel ratio, makes air-fuel ratio accurately be adjusted to safely again rapidly optimum value, and air and coal gas are fully burnt, reduce the use of coal gas, reduced the pollution of air, aspect energy-conservation, obtained good economic benefit, amount of energy saving is more than 5%.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model;
Fig. 2 is structural representation of the present utility model.
In figure, mark is as follows: residual oxygen analytical instrument 1, waste gas heat galvanic couple 2, vault thermocouple 3, gas regulator 4, air control valve 5, gas flow meter 6, mass air flow sensor 7, combustion controller 8, programmable controller 9, isolator 10, hot-blast stove 11.
The specific embodiment
Formation of the present utility model comprises residual oxygen analytical instrument 1, waste gas heat galvanic couple 2, vault thermocouple 3, gas regulator 4, air control valve 5, gas flow meter 6, mass air flow sensor 7, combustion controller 8, isolator 10.
In figure, show, waste gas heat galvanic couple 2, vault thermocouple 3, gas flow meter 6, mass air flow sensor 7 are installed respectively on hot-blast stove 11, and their signal output part is connected with the signal input part of combustion controller 8 by isolator 10.
The effect of waste gas heat galvanic couple 2 is to measure EGT, vault thermocouple 3 is for measuring dome temperature, gas regulator 4 is for controlling gas flow, air control valve 5 is for controlling air mass flow, gas flow meter 6 is for measuring gas flow, mass air flow sensor 7 is for measuring air mass flow, and the effect of combustion controller 8 is to regulate gas regulator 4 and air control valve 5 according to data such as the dome temperature of feedback, EGT, remaining oxygens, and isolator 10 is for shunting signal.
In figure, show, residual oxygen analytical instrument 1 is arranged on the flue of hot-blast stove 11, and the signal output part of residual oxygen analytical instrument 1 is connected with the signal input part of combustion controller 8.The effect of residual oxygen analytical instrument is the oxygen content of measuring in flue gas.
In figure, show, waste gas heat galvanic couple 2, vault thermocouple 3, gas flow meter 6, mass air flow sensor 7 are divided into two signal to be connected to respectively programmable controller 9 and combustion controller 8 by isolator 10, residual waste gas oxygen signal is reached combustion controller 8 by residual oxygen analytical instrument 1 simultaneously, and programmable controller 9 does communication with combustion controller 8, combustion controller 8 regulates gas regulator 4 and air control valve 5 according to the number of scene feedback.
The course of work of the present utility model is as follows:
Manual switchover is to " automatic burning stove ", click " starting to burn stove ", gas regulator 4, the air control valve 5 of hot-blast stove 11 start slowly to open, and gas regulator 4 stops while opening to original coal tolerance, and air control valve 5 is according to initial air-fuel ratio regulation, enter rapid burning period, residual oxygen analytical instrument 1 starts to measure the oxygen content in flue gas, calculates according to theory, and oxygen content controller setting value is generally set in 0.2% to be had, but there is certain ripple, as long as fluctuation is 0.0% ~ 0.3%.In controller dead band design, do not do to change in 0.1% ~ 0.2% interval controller output, particularly oxygen content was less than for 0.1% duration and is less than having thought of 5s, and controller need not move.If continue to be less than 0.1%5s above and equal 0.0%2s more than, controller needs action, strengthens air door, and oxygen content is controlled to more than 0.1%, in like manner can be used on oxygen content and is greater than in 0.2% judgement.Control system can be remembered oxygen content in the air-fuel ratio in 0.1% ~ 0.2% interval, and as the reference data of burning next time, combustion system enters vault directorial area and waste gas directorial area afterwards, until burning finishes.
Claims (2)
1. the residual oxygen analytic combustion of a hot-blast stove control device, its formation comprises combustion controller (8), isolator (10), waste gas heat galvanic couple (2), vault thermocouple (3), gas regulator (4), air control valve (5), gas flow meter (6), mass air flow sensor (7), waste gas heat galvanic couple (2), vault thermocouple (3), gas flow meter (6), mass air flow sensor (7) is arranged on respectively on hot-blast stove (11), their signal output part is connected with the signal input part of combustion controller (8) by isolator (10), it is characterized in that: it has also increased residual oxygen analytical instrument (1), residual oxygen analytical instrument (1) is arranged on the flue of hot-blast stove (11), the signal output part of residual oxygen analytical instrument (1) is connected with the signal input part of combustion controller (8).
2. the residual oxygen analytic combustion of hot-blast stove according to claim 1 control device, is characterized in that: the gas regulator (4) on the gas inlet pipe road of the signal output part of described combustion controller (8) and hot-blast stove (11), the air control valve (5) on air input channel are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420023937.6U CN203656971U (en) | 2014-01-15 | 2014-01-15 | Residual oxygen analytic combustion control device of hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420023937.6U CN203656971U (en) | 2014-01-15 | 2014-01-15 | Residual oxygen analytic combustion control device of hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656971U true CN203656971U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420023937.6U Expired - Lifetime CN203656971U (en) | 2014-01-15 | 2014-01-15 | Residual oxygen analytic combustion control device of hot blast stove |
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| CN (1) | CN203656971U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534504A (en) * | 2014-12-25 | 2015-04-22 | 河北钢铁股份有限公司承德分公司 | Rotary kiln combustion control device and method |
| CN106352339A (en) * | 2016-11-01 | 2017-01-25 | 深圳德尔科机电环保科技有限公司 | Optimal control system for air-fuel ratio of gas heating furnace |
| CN108458486A (en) * | 2018-04-13 | 2018-08-28 | 安徽工业大学 | A kind of Combustion of Hot Air Furnace automatic control system and its control method |
| CN114350877A (en) * | 2022-01-10 | 2022-04-15 | 广东韶钢松山股份有限公司 | Hot-blast stove baking method |
-
2014
- 2014-01-15 CN CN201420023937.6U patent/CN203656971U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534504A (en) * | 2014-12-25 | 2015-04-22 | 河北钢铁股份有限公司承德分公司 | Rotary kiln combustion control device and method |
| CN104534504B (en) * | 2014-12-25 | 2017-01-18 | 河北钢铁股份有限公司承德分公司 | Rotary kiln combustion control device and method |
| CN106352339A (en) * | 2016-11-01 | 2017-01-25 | 深圳德尔科机电环保科技有限公司 | Optimal control system for air-fuel ratio of gas heating furnace |
| CN106352339B (en) * | 2016-11-01 | 2018-06-08 | 深圳德尔科机电环保科技有限公司 | A kind of gas-fired heater optimization of air-fuel ratio control system |
| CN108458486A (en) * | 2018-04-13 | 2018-08-28 | 安徽工业大学 | A kind of Combustion of Hot Air Furnace automatic control system and its control method |
| CN114350877A (en) * | 2022-01-10 | 2022-04-15 | 广东韶钢松山股份有限公司 | Hot-blast stove baking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 2316-04, Block B, Binjiang Business Building, No. 158, Zhongshan East Road, Qiaoxi District, Shijiazhuang City, Hebei Province, 050000 Patentee after: Hebei Hanyao Carbon New Energy Technology Co.,Ltd. Address before: Room 2315, Block B, Binjiang Business Building, No. 158, Zhongshan East Road, Shijiazhuang City, Hebei Province, 050000 Patentee before: HEBEI HANYAO ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |