CN102777926B - Intelligent rotary air heater on basis of comprehensive temperature control at cold end of air preheater - Google Patents
Intelligent rotary air heater on basis of comprehensive temperature control at cold end of air preheater Download PDFInfo
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- CN102777926B CN102777926B CN201210282876.0A CN201210282876A CN102777926B CN 102777926 B CN102777926 B CN 102777926B CN 201210282876 A CN201210282876 A CN 201210282876A CN 102777926 B CN102777926 B CN 102777926B
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- air heater
- air
- air preheater
- preheater
- heater
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- 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
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Abstract
The invention relates to an air heater and particularly discloses an intelligent rotary air heater on the basis of the comprehensive temperature control at the cold end of an air preheater. The intelligent rotary air heater comprises an air heater connected with the air preheater. The intelligent rotary air heater is characterized in that monitoring points are respectively arranged on an air passage and a flue gas passage of the air preheater; both the monitoring points are connected with a primary comparator; the primary comparator is connected with a comprehensive comparator communicated with a calculation function device; and the comprehensive comparator regulates a rotary executing mechanism arranged on the air heater by a proportional/integral controller. The intelligent rotary air heater has simple structure, is convenient to use, has reasonable design and is flexible to apply; a stop/start function of the air heater can be changed into a continuous mode from a discrete mode; the effective time of inhibiting the low temperature corrosion of the air preheater is prolonged; and power not only can be saved during the stop period, but also can be saved during the operation period.
Description
(1) technical field
The present invention relates to a kind of steam air heater, particularly a kind of intelligence controlled based on air preheater cold-end air integrated temperature can revolve steam air heater.
(2) background technology
The boiler of current big-and-middle-sized power plant generally adopts rotatable steam air heater to replace former fixed steam air heater, like this, can rotating tube bank working face when inactive steam air heater, emptying air channel, thus avoid excessive power consumption.But steam air heater can be revolved both at home and abroad to be at present in operation and can not to regulate working surface angle, the cost that can revolve steam air heater operation power consumption can not be reduced.
Steam air heater when the northern area of China spring and autumn or south China area winter operation, often need daytime and stop vapour, night steam supply, traditional rotary air heater, owing to cannot frequently excising or drop into, cannot adapt to this requirement, also can cause the increase of excessive power consumption.
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, and the intelligence based on the control of air preheater cold-end air integrated temperature providing a kind of structure simple, energy-saving and cost-reducing can revolve steam air heater.
The present invention is achieved through the following technical solutions:
A kind of intelligence controlled based on air preheater cold-end air integrated temperature can revolve steam air heater, comprise the steam air heater connecting air preheater, it is characterized in that: the air duct of air preheater and exhaust gases passes are respectively arranged with monitoring point, two monitoring points are all connected with elementary comparator, elementary comparator is connected with the Integrated comparative device being communicated with computing function device, and Integrated comparative device passing ratio/integral controller regulates the rotary actuator be arranged on steam air heater.
The outlet cigarette temperature of the outlet wind-warm syndrome of steam air heater and air preheater is introduced the control loop of intelligent steam air heater by the present invention, the setting of computing function device is used for determining cold junction integrated temperature set-point, rotary actuator accepts the anglec of rotation control instruction of adjuster, any working position realizing 0 ~ 180 degree regulates, and automatically maintaining cold junction integrated temperature is set-point.
More excellent scheme of the present invention is:
Described rotary actuator is stepless electrodynamic type mechanism, achieves flexibility and the convenience of application of installation, is convenient to receive instruction in time and regulate steam air heater tube bank position.
Described computing function device connects coal property test system, is provided with the flue gas dew point of touch-control air preheater, cold junction integrated temperature set-point and anglec of rotation controlling value, as standard operating conditions value, so that adjust in time in it.
The air intake valve of described steam air heater retains opening/closing two positions, has exited shaping modes, makes steam air heater energy-saving mode become 0 degree/90 degree/three economize on electricitys at any angle from the dibit energy-saving mode of 0 degree/90 degree.
Structure of the present invention is simple, easy to use, reasonable in design, applying flexible, can change the function of stop using/enabling of steam air heater into continuous mode by discrete mode, extends the effective time of suppressing low-temperature corrosion of air preheater, not only economize on electricity between lay-off period, and run duration also can economize on electricity.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the pattern diagram that works by day of steam air heater of the present invention;
Fig. 3 is the pattern diagram of working at night of steam air heater of the present invention.
In figure, 1 air duct, 2 exhaust gases passes, 3 elementary comparators, 4 computing function devices, 5 Integrated comparative devices, 6 adjusters, 7 rotary actuators, 8 steam air heaters.
(5) detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention.This embodiment comprises the steam air heater 8 connecting air preheater, the air duct 1 of air preheater and exhaust gases passes 2 are respectively arranged with monitoring point, two monitoring points are all connected with elementary comparator 3, elementary comparator 3 is connected with the Integrated comparative device 5 being communicated with computing function device 4, and Integrated comparative device 5 passing ratios/integral controller 6 regulates the rotary actuator 7 be arranged on steam air heater 8; Described rotary actuator 7 is stepless electrodynamic type mechanism; Described computing function device 4 connects coal property test system, is provided with the flue gas dew point of touch-control air preheater, cold junction integrated temperature set-point and anglec of rotation controlling value in it; The air intake valve of described steam air heater 8 retains opening/closing two positions.
According to operation coal varitation, computing function device 4 calculates cold junction integrated temperature set-point, for controlling the outlet wind-warm syndrome of steam air heater 8 in real time.Elementary comparator 3 exports the actual cold junction integrated temperature value recorded, the difference of Integrated comparative device 5 to actual cold junction integrated temperature value and cold junction integrated temperature set-point carries out the instruction of analysis and Control adjuster 6 Drazin inverse, change the displacement of rotary actuator 7, rotary actuator 7 control bundle working face and air carry out the angle of flow path direction, change air velocity and tube bank arrangement simultaneously, thus change steam air heater 8 heat output and air temperature rise, when air velocity reduces, reduction falls in the wind side pressure of steam air heater 8, reaches the object running economize on electricity.
The working position of steam air heater mainly contains three kinds:
(1) inactive position: air preheater air-pressure drop is minimum, but to preheater unprotect function;
(2) run position: air preheater air-pressure drop and steam air heater 8 temperature rise are functional relation, can carry out not discrete continuous protection to air preheater, and perform operation electricity-saving function;
(3) purge position: utilize air self kinetic energy, blowback is carried out to steam air heater tube bank, avoids labor cleaning, maintenance.
Due to the air-pressure drop of steam air heater 8 and power consumption and steam air heater 8 temperature rise proportional, when steam air heater 8 EAT raises, adjuster 6 exports tube bank rotating operation position, reduces steam consumption, and automatically to maintain cold junction integrated temperature be set-point.
Claims (2)
1. the intelligence controlled based on air preheater cold-end air integrated temperature can revolve steam air heater, comprise the steam air heater connecting air preheater, it is characterized in that: the air duct of air preheater and exhaust gases passes are respectively arranged with monitoring point, two monitoring points are all connected with elementary comparator, elementary comparator is connected with the Integrated comparative device being communicated with computing function device, elementary comparator exports the actual cold junction integrated temperature value recorded, the difference of Integrated comparative device to actual cold junction integrated temperature value and cold junction integrated temperature set-point carries out the instruction of analysis and Control adjuster Drazin inverse, change the displacement of rotary actuator, Integrated comparative device passing ratio/integral controller regulates the rotary actuator be arranged on steam air heater, described rotary actuator is stepless electrodynamic type mechanism, described computing function device connects coal property test system, is provided with the flue gas dew point of touch-control air preheater, cold junction integrated temperature set-point and anglec of rotation controlling value in it.
2. the intelligence controlled based on air preheater cold-end air integrated temperature according to claim 1 can revolve steam air heater, it is characterized in that: the air intake valve of described steam air heater retains opening/closing two positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282876.0A CN102777926B (en) | 2012-08-10 | 2012-08-10 | Intelligent rotary air heater on basis of comprehensive temperature control at cold end of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282876.0A CN102777926B (en) | 2012-08-10 | 2012-08-10 | Intelligent rotary air heater on basis of comprehensive temperature control at cold end of air preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777926A CN102777926A (en) | 2012-11-14 |
| CN102777926B true CN102777926B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210282876.0A Active CN102777926B (en) | 2012-08-10 | 2012-08-10 | Intelligent rotary air heater on basis of comprehensive temperature control at cold end of air preheater |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113204B (en) * | 2020-08-14 | 2022-05-03 | 中国神华能源股份有限公司国华电力分公司 | Temperature control method and device of air preheater and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162647A (en) * | 2011-04-19 | 2011-08-24 | 西安交通大学 | Frameless detachment-free rotary air heater |
| CN102278768A (en) * | 2011-06-28 | 2011-12-14 | 高明逊 | Energy-saving optimizing control system of power station boiler steam air heater |
| CN202709170U (en) * | 2012-08-10 | 2013-01-30 | 山东泓奥电力科技有限公司 | Intelligent rotatable steam air heater based on comprehensive temperature control of cold end of air preheater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110303135A1 (en) * | 2010-06-14 | 2011-12-15 | Alstom Technology Ltd | Regenerative air preheater design to reduce cold end fouling |
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2012
- 2012-08-10 CN CN201210282876.0A patent/CN102777926B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162647A (en) * | 2011-04-19 | 2011-08-24 | 西安交通大学 | Frameless detachment-free rotary air heater |
| CN102278768A (en) * | 2011-06-28 | 2011-12-14 | 高明逊 | Energy-saving optimizing control system of power station boiler steam air heater |
| CN202709170U (en) * | 2012-08-10 | 2013-01-30 | 山东泓奥电力科技有限公司 | Intelligent rotatable steam air heater based on comprehensive temperature control of cold end of air preheater |
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| CN102777926A (en) | 2012-11-14 |
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