CN102937289A - Method and device for saving water and energy of converter waste heat boiler - Google Patents
Method and device for saving water and energy of converter waste heat boiler Download PDFInfo
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- CN102937289A CN102937289A CN2012104525349A CN201210452534A CN102937289A CN 102937289 A CN102937289 A CN 102937289A CN 2012104525349 A CN2012104525349 A CN 2012104525349A CN 201210452534 A CN201210452534 A CN 201210452534A CN 102937289 A CN102937289 A CN 102937289A
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Abstract
The invention relates to the field of water level controlling of a drum of a converter waste heat boiler, in particular to a method and a device for saving water and energy of the converter waste heat boiler. The method is characterized in that the processes of water level controlling of the drum of the waste heat boiler and pollution discharging are separated, so that the discharging operation caused by the fact that the water level in the drum is too high is reduced. The method particularly includes the following processes: when the water level in the drum of the waste heat boiler exceeds an upper limit, a water discharging pneumatic valve is turned on, sewage in the drum enters a pollution-discharging flash vessel, and the redundant hot water in the drum is guided into a deaerator after timing for a period of time until the water level of the deaerator is lower than the lower limit or oxygen blast of a converter occurs. When oxygen blast of the converter stops, and the water level in the deaerator is higher than the upper limit or the redundant hot water in the drum is disqualified, the redundant hot water in the drum is still guided into the pollution-discharging flash vessel. Compared with the prior art, the method and the device for saving water and energy of the converter waste heat boiler have the advantages of separating water level controlling from the pollution discharging process, reducing pollution discharging rate, according with the national energy-saving and emission-reducing strategy target and having good application prospect.
Description
Technical field
The present invention relates to the Drum Waterlevel For Wasteheat Boiler of Converter control field, relate in particular to a kind of method of saving water and energy and device of Converter Residual Heat Boiler.
Background technology
Drum Waterlevel For Wasteheat Boiler of Converter rationally and effectively control is more scabrous problem all the time.According to the related specifications of country, industry, waste heat boiler normal " blowdown rate " answers≤5%.Converter Residual Heat Boiler adopts two water level controls in the steel-making enterprise, when having solved a water level control difficult problem, but causes blowdown rate larger, actual average " blowdown rate " 〉=21%.In order to guarantee carrying out smoothly of STEELMAKING PRODUCTION, must keep the ordinary water level of the high-order drum of Converter Residual Heat Boiler, this is that Converter Residual Heat Boiler system formation characteristics determine, rather than the needs of waste heat boiler blowdown.
Too high " blowdown rate " not only wasted a large amount of most valuable demineralized water resources, a large amount of heats has been taken away again in the discharging of a large amount of high temperature " blowdown " water, so that the quantity of steam of Converter Residual Heat Boiler production reduces in a large number, and, new pollution problem also produced.
Summary of the invention
The method of saving water and energy and the device that the purpose of this invention is to provide a kind of Converter Residual Heat Boiler, under the prerequisite that does not affect the production run requirement, rationally control the blowdown process of waste heat boiler, water level control is distinguished with the blowdown process, reduce unnecessary " blowdown rate ", realize energy-saving and emission-reduction.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of method of saving water and energy of Converter Residual Heat Boiler, it is characterized in that, the control of waste heat boiler steam water-level is separated with the blowdown process, minimizing is because of the too high emissions operation that causes of water level in the drum, its concrete control procedure is as follows: water level surpasses upper prescribing a time limit in the waste heat boiler drum, and the draining pneumatic operated valve is opened, and sewage enters in the blowdown system in the drum, timing a period of time, hot water unnecessary in the drum imported in the oxygen-eliminating device until deaerator level when being lower than lower limit or Converter Oxigen Blowing.
When not oxygen blast of converter and deaerator level are higher than in limited time or when unnecessary hot water water quality was defective in the drum, unnecessary hot water still imported in the blowdown system in the described drum.
A kind of device of saving water and energy of Converter Residual Heat Boiler comprises drum, oxygen-eliminating device and sampling cooler, is provided with the threeway pneumatic operated valve at the blow-off pipe of drum; The filling pipe of oxygen-eliminating device is provided with pneumatic operated valve, and the filling pipe of oxygen-eliminating device links to each other with threeway pneumatic operated valve on the drum blow-off pipe; The outlet pipe of sampling cooler is provided with pH meter and hardometer, and PLC system in control room links to each other with pneumatic operated valve with pH meter, hardometer, threeway pneumatic operated valve respectively.
Compared with former technology, the invention has the beneficial effects as follows: realize the waste heat boiler purpose of saving water and energy by reasonable control Converter Residual Heat Boiler water level method, water level control is distinguished with the blowdown process, reduce unnecessary " blowdown rate ", thereby for the waste heat boiler steam water-level rationally effectively is provided by a kind of brand-new method that provides, meet the strategic objective of the energy-saving and emission-reduction of country, have good popularizing application prospect.
Description of drawings
Fig. 1 is apparatus of the present invention example structure schematic diagram;
Fig. 2 is the structural representation that the present invention is applied to many converter systems embodiment.
Among the figure: 1-drum 2-oxygen-eliminating device 3-sampling cooler 4 – blow-off pipe 5-threeway pneumatic operated valve 6-filling pipe 7-pneumatic operated valve 8-probe tube 9-pH meter 10-hardometer 11-draining pneumatic operated valves
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Seeing Fig. 1, is the device example structure schematic diagram of saving water and energy of a kind of Converter Residual Heat Boiler of the present invention, comprises drum 1, oxygen-eliminating device 2 and sampling cooler 3, is provided with threeway pneumatic operated valve 5 at the blow-off pipe 4 of drum 1; The filling pipe 6 of oxygen-eliminating device 5 is provided with pneumatic operated valve 7, and the filling pipe 6 of oxygen-eliminating device links to each other with threeway pneumatic operated valve 5 on the blow-off pipe of drum; The probe tube 8 of sampling cooler 3 is provided with pH meter 9 and hardometer 10, and PLC system in control room links to each other with pH meter 9, hardometer 10, threeway pneumatic operated valve 5 and pneumatic operated valve 7 respectively.
The method of saving water and energy of a kind of Converter Residual Heat Boiler of the present invention, to separate with the blowdown process by the control with the waste heat boiler steam water-level, minimizing is because of the too high emissions operation that causes of water level in the drum, its concrete control procedure is as follows: when the waste heat boiler normal operation, water level surpasses upper prescribing a time limit in the drum, draining pneumatic operated valve 11 is opened, the logical AB of AC is disconnected on the threeway pneumatic operated valve 5, drum 1 interior sewage enters in the blowdown system, timing is (this time calculates according to blowdown flow rate, also can adjust according to the actual motion effect) after 1.5～3 minutes, oxygen-eliminating device 2 water levels≤450mm(lower limit water level) or during Converter Oxigen Blowing, pneumatic operated valve 7 is opened, the logical AC of AB is disconnected on the threeway pneumatic operated valve 5, and hot water unnecessary in the drum imports in the oxygen-eliminating device 2, and hot water is able to reuse, so both regulate steam water-level, reduced again too much hot water emission; After water level fell back to safety value in the drum, draining pneumatic operated valve 11 cut out, and stopped to discharge water;
When not oxygen blast of converter and deaerator level 〉=500mm(upper limit water level) time or drum in sewage quality when defective; at this moment; unnecessary hot water still imports in the blowdown system in the drum, and this step can be avoided oxygen-eliminating device overfill or oxygen-eliminating device fouling and corrosion as link of protection.
See Fig. 2, it is the structural representation that the present invention is applied to many converter systems embodiment, among the embodiment, three Converter Residual Heat Boilers are arranged, three block converters are carried out three and are blown two methods of operation, adopt piping-main scheme that three block converter waste heat boiler drum blow-off pipes and oxygen-eliminating device filling pipe thereof are communicated with, by the PLC system in Converter Residual Heat Boiler control room, form a complete organic system.
When certain converter deaerator level is lower than lower limit water level or certain Converter Oxigen Blowing, open the pneumatic operated valve on this converter oxygen-eliminating device filling pipe, unnecessary sewage flows in this converter oxygen-eliminating device in this waste heat boiler drum.When certain not oxygen blast of converter and deaerator level are higher than upper limit water level, close the pneumatic operated valve on the filling pipe of this converter oxygen-eliminating device.Owing to have at least a pneumatic operated valve on the oxygen-eliminating device filling pipe to open in three converters, therefore arbitrary the interior unnecessary sewage of waste heat boiler drum all can be recycled, and is not limited in the corresponding oxygen-eliminating device.
Claims (3)
1. the method for saving water and energy of a Converter Residual Heat Boiler, it is characterized in that, the control of waste heat boiler steam water-level is separated with the blowdown process, minimizing is because of the too high emissions operation that causes of water level in the drum, its concrete control procedure is as follows: water level surpasses upper prescribing a time limit in the waste heat boiler drum, and the draining pneumatic operated valve is opened, and sewage enters in the blowdown system in the drum, timing a period of time, hot water unnecessary in the drum imported in the oxygen-eliminating device until deaerator level when being lower than lower limit or Converter Oxigen Blowing.
2. the method for saving water and energy of described a kind of Converter Residual Heat Boiler according to claim 1, it is characterized in that, when not oxygen blast of converter and deaerator level are higher than in limited time or when unnecessary hot water water quality was defective in the drum, unnecessary hot water still imported in the blowdown system in the described drum.
3. realize the device of saving water and energy of a kind of Converter Residual Heat Boiler of claim 1 or 2 described methods, comprise drum, oxygen-eliminating device and sampling cooler, it is characterized in that, be provided with the threeway pneumatic operated valve at the blow-off pipe of drum; The filling pipe of oxygen-eliminating device is provided with pneumatic operated valve, and the filling pipe of oxygen-eliminating device links to each other with threeway pneumatic operated valve on the drum blow-off pipe; The outlet pipe of sampling cooler is provided with pH meter and hardometer, and PLC system in control room links to each other with pneumatic operated valve with pH meter, hardometer, threeway pneumatic operated valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452534.9A CN102937289B (en) | 2012-11-12 | 2012-11-12 | Method and device for saving water and energy of converter waste heat boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452534.9A CN102937289B (en) | 2012-11-12 | 2012-11-12 | Method and device for saving water and energy of converter waste heat boiler |
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| CN102937289A true CN102937289A (en) | 2013-02-20 |
| CN102937289B CN102937289B (en) | 2014-07-23 |
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| CN201210452534.9A Active CN102937289B (en) | 2012-11-12 | 2012-11-12 | Method and device for saving water and energy of converter waste heat boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112631343A (en) * | 2020-12-23 | 2021-04-09 | 浙江浙能绍兴滨海热电有限责任公司 | Method for controlling water level by parallelly operating multiple deaerators in main pipe system |
Citations (8)
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|---|---|---|---|---|
| CN1153266A (en) * | 1995-12-25 | 1997-07-02 | 冶金工业部重庆钢铁设计研究院 | Deaerating system for integrated deaerator |
| CN2867113Y (en) * | 2005-12-14 | 2007-02-07 | 中国神华能源股份有限公司 | Soot blowing and hydrophobic system used for coal-fired boiler |
| JP3972495B2 (en) * | 1998-12-11 | 2007-09-05 | 株式会社明電舎 | Boiler drum water level controller |
| CN201636838U (en) * | 2009-12-16 | 2010-11-17 | 孟霞 | Automatic blow-down device for power station boilers |
| CN201882998U (en) * | 2010-11-24 | 2011-06-29 | 济南市琦泉热电有限责任公司 | High-temperature high-pressure boiler water treatment equipment |
| CN202074501U (en) * | 2011-01-14 | 2011-12-14 | 东营鲁方金属材料有限公司 | Exhaust-heat boiler blow-off steam comprehensive recycling device |
| CN202322899U (en) * | 2011-11-21 | 2012-07-11 | 安阳钢铁股份有限公司 | Intelligent water supply device for steel converter steam drum |
| CN202915339U (en) * | 2012-11-12 | 2013-05-01 | 鞍钢集团工程技术有限公司 | Water-saving energy-saving device of converter heat recovery boiler |
-
2012
- 2012-11-12 CN CN201210452534.9A patent/CN102937289B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153266A (en) * | 1995-12-25 | 1997-07-02 | 冶金工业部重庆钢铁设计研究院 | Deaerating system for integrated deaerator |
| JP3972495B2 (en) * | 1998-12-11 | 2007-09-05 | 株式会社明電舎 | Boiler drum water level controller |
| CN2867113Y (en) * | 2005-12-14 | 2007-02-07 | 中国神华能源股份有限公司 | Soot blowing and hydrophobic system used for coal-fired boiler |
| CN201636838U (en) * | 2009-12-16 | 2010-11-17 | 孟霞 | Automatic blow-down device for power station boilers |
| CN201882998U (en) * | 2010-11-24 | 2011-06-29 | 济南市琦泉热电有限责任公司 | High-temperature high-pressure boiler water treatment equipment |
| CN202074501U (en) * | 2011-01-14 | 2011-12-14 | 东营鲁方金属材料有限公司 | Exhaust-heat boiler blow-off steam comprehensive recycling device |
| CN202322899U (en) * | 2011-11-21 | 2012-07-11 | 安阳钢铁股份有限公司 | Intelligent water supply device for steel converter steam drum |
| CN202915339U (en) * | 2012-11-12 | 2013-05-01 | 鞍钢集团工程技术有限公司 | Water-saving energy-saving device of converter heat recovery boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112631343A (en) * | 2020-12-23 | 2021-04-09 | 浙江浙能绍兴滨海热电有限责任公司 | Method for controlling water level by parallelly operating multiple deaerators in main pipe system |
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| CN102937289B (en) | 2014-07-23 |
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