CN101225951B - Computer control rotary regenerative air preheater with controllable heat exchange capability - Google Patents
Computer control rotary regenerative air preheater with controllable heat exchange capability Download PDFInfo
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- CN101225951B CN101225951B CN2007100365161A CN200710036516A CN101225951B CN 101225951 B CN101225951 B CN 101225951B CN 2007100365161 A CN2007100365161 A CN 2007100365161A CN 200710036516 A CN200710036516 A CN 200710036516A CN 101225951 B CN101225951 B CN 101225951B
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- air preheater
- rotary regenerative
- regenerative air
- rotary air
- speed
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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 a rotary air preheater of the controllable heat exchanging capacity which can be controlled by a computer, which comprises a rotary air preheater body (1), a speed change drive unit(2), a speed change control interface(3) and a computer control system(4). The rotary air preheater body (1) comprises a rotary air preheater rotor(5). The rotary air preheater adopts the method that the rotational speed of the rotary air preheater rotor is controlled and adjusted by the computer, so that the heat exchanging capacity of the rotary air preheater can be controlled. When the rotational speed of the rotary air preheater rotor is lowered, the heat exchanging capacity of the rotary air preheater will be monotonically decreased, and the exhaust gas temperature of boiler will be controlled to rise; the ash corrosion in low-temperature heating surface area can be alleviated. The technical proposal provided can adjust the rotational speed of the rotary air preheater rotor when the utility boiler is operating, and can optimize the heat exchanging capacity of the rotary air preheater so as to make the rotary air preheater be matched with the load and working condition of the utility boiler.
Description
(1) technical field: the present invention relates to the controlled rotary regenerative air preheater of exchange capability of heat that a kind of station boiler is used.The present invention is applicable to heating surface rotary regenerative air preheater and Air Hood Rotating Type Air Preheater.
(2) background technology: the rotor of the station boiler rotary regenerative air preheater of prior art is all moving under rated speed under the station boiler different load.When the station boiler underrun, the exchange capability of heat of prior art station boiler rotary regenerative air preheater is obviously superfluous, causes exhaust gas temperature low excessively, low temperature heating surface dust stratification, corrosion, especially when boiler was furnished with the selective denitrification device, situation was even more serious.
Have the drive motors of some rotary regenerative air preheater rotors to be furnished with variable-frequency power sources, but this variable-frequency power sources is used to reduce the angular acceleration of rotary regenerative air preheater start-up course rotor to reduce necessary staring torque only as soft starting device.
(3) summary of the invention: the present invention is a kind of controlled rotary regenerative air preheater of computer-controlled exchange capability of heat that adopts, by rotary regenerative air preheater body (1), and speed-changing driving device (2), speed Control interface (3), computer control system (4) is formed.Include rotary regenerative air preheater rotor (5) in the rotary regenerative air preheater body (1).
When the rotating speed of rotary regenerative air preheater rotor (5) reduced, the exchange capability of heat of rotary regenerative air preheater is dull to descend, the controlled rising of exhaust gas temperature, and low temperature heating surface dust stratification, corrosion are alleviated.The rotating speed of regulating rotary regenerative air preheater rotor (5) can effectively be controlled the exchange capability of heat of rotary regenerative air preheater.For avoiding rotary regenerative air preheater rotor (5) that irregular deformation takes place, the rotating speed decline process of rotary regenerative air preheater rotor (5) should be enough slow.The rotating speed uphill process of rotary regenerative air preheater rotor (5) can be very fast, is no more than the angular acceleration that allows in the soft start-up process and gets final product.The lower limit of rotary regenerative air preheater rotor (5) rotating speed has different numerical value to different rotary regenerative air preheater bodies (1), can't avoid rotary regenerative air preheater rotor (5) that irregular deformation takes place under this rotating speed.
Computer control system (4) changes the rotating speed of speed-changing driving device (2) in order to regulate the rotating speed of rotary regenerative air preheater rotor (5) by speed Control interface (3).The speed-changing driving device (2) of rotary regenerative air preheater rotor (5) can stepless or step speed change.For example:
● variable-frequency power sources adds alternating current generator;
● fluid coupling adds alternating current generator;
● direct current generator;
● speed-changing gear box;
The invention provides a kind of in service at station boiler, intelligence is regulated the rotating speed of rotary regenerative air preheater rotor, optimize the technical scheme that exchange capability of heat makes it with station boiler is loaded, operating mode is complementary of rotary regenerative air preheater, adopt benefit of the present invention to be:
● in the boiler design stage, can select relative prior art, the exhaust gas temperature under the lower boiler rated load improves boiler design efficient.And needn't worry that serious dust stratification and corrosion take place the low temperature heating surface at air preheater under the boiler at low load operating mode.
● can reduce the manufacturing cost of the air preheater of joining the selective denitrification device.
● can the rotary regenerative air preheater of active service be undergone technological transformation, improve its anti-stifled ash, erosion-resisting ability, effectively prolong the service life of the heating surface of preheater.
● can improve the grey effect of blowing of preheater soot blower, prevent that the pressure drop of preheater heating surface from excessively raising, reduce the preheater air leakage coefficient.
● can reduce the operation power consumption of rotary regenerative air preheater.
● can prolong the service life of rotary regenerative air preheater rotor load-bearing bearing.
The present invention is applicable to heating surface rotary regenerative air preheater and Air Hood Rotating Type Air Preheater.
To Air Hood Rotating Type Air Preheater, controlled plant is the rotating speed of revolution fan housing.
The present invention both had been applicable to that the rotary regenerative air preheater of new design, production also can be used for the rotary regenerative air preheater of active service is undergone technological transformation.
Fig. 1 structural representation of the present invention
Include rotary regenerative air preheater rotor (5) in the rotary regenerative air preheater body (1).
Speed-changing driving device (2) represents that with the line between the rotary regenerative air preheater rotor (5) the reductor tool connects.
Line between speed Control interface (3) and the computer control system (4) is represented the both-way communication interface.
Line between speed Control interface (3) and the speed-changing driving device (2) is represented the control relation.
Fig. 2 example 1 structural representation
Include rotary regenerative air preheater rotor (5) in the rotary regenerative air preheater body (1).
Drive motors (6) represents that with the line between the rotary regenerative air preheater rotor (5) the reductor tool connects.
The variable-frequency power sources (7) of band system interface is represented electric the connection with the line between the drive motors (6).
Line between the variable-frequency power sources (7) of DCS switch board (8) and band control interface is represented the control relation.
Line between DCS operator station (9) and the DCS switch board (8) is represented the both-way communication interface.
In Fig. 1, Fig. 2:
1 rotary regenerative air preheater body, 2 speed-changing driving devices, 3 speed Control interfaces
4 computer control systems, 5 rotary regenerative air preheater rotors, 6 drive motors
The variable-frequency power sources 8DCS switch board 9DCS operator station of 7 band system interfaces
(5) specific embodiment: this example 1 is the controlled rotary regenerative air preheater of exchange capability of heat of a kind of employing DCS (dcs) control, by rotary regenerative air preheater body (1), drive motors (6), the variable-frequency power sources (7) of band control interface, DCS switch board (8), DCS operator station (9) forms.Comprise rotary regenerative air preheater rotor (5) in the rotary regenerative air preheater body (1).
It is a kind of in service at station boiler that this example 1 provides, optimize the technical scheme that exchange capability of heat makes it with station boiler is loaded, operating mode is complementary of rotary regenerative air preheater, be applicable to the boiler unit that adopts DCS (dcs) control, its advantage is DCS switch board (8), DCS operator station (9) and data can be shared, and save the control cable.The program of the guaranteed rotary regenerative air preheater rotor of DCS switch board (8) configuration safety speed change and make the exchange capability of heat of rotary regenerative air preheater and the program of boiler load, operation optimization coupling, DCS operator station (9) configuration has the picture of being convenient to the boiler operatiopn personnel control.
Claims (3)
1. rotary regenerative air preheater that the computer control exchange capability of heat is controlled, it is characterized in that: by rotary regenerative air preheater body (1), speed-changing driving device (2), speed Control interface (3), computer control system (4) is formed, wherein, include rotary regenerative air preheater rotor (5) in the rotary regenerative air preheater body (1); In service at station boiler, when the rotating speed of rotary regenerative air preheater rotor (5) reduced, the exchange capability of heat of rotary regenerative air preheater is dull to descend, the controlled rising of exhaust gas temperature, and low temperature heating surface dust stratification, corrosion are alleviated; Computer control system (4) changes the rotating speed of speed-changing driving device (2) in order to regulate the rotating speed of rotary regenerative air preheater rotor (5) by speed Control interface (3), the exchange capability of heat of optimizing rotary regenerative air preheater makes it to be complementary with station boiler load, operating mode.
2. the controlled rotary regenerative air preheater of computer control exchange capability of heat according to claim 1 is characterized in that: described speed-changing driving device (2) can stepless or step speed change.
3. the controlled rotary regenerative air preheater of computer control exchange capability of heat according to claim 1 is characterized in that: the program of the safe speed change of the guaranteed rotary regenerative air preheater rotor of described computer control system (4) configuration (5) and the program that exchange capability of heat makes it with station boiler is loaded, operating mode is complementary of optimizing rotary regenerative air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100365161A CN101225951B (en) | 2007-01-17 | 2007-01-17 | Computer control rotary regenerative air preheater with controllable heat exchange capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100365161A CN101225951B (en) | 2007-01-17 | 2007-01-17 | Computer control rotary regenerative air preheater with controllable heat exchange capability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101225951A CN101225951A (en) | 2008-07-23 |
| CN101225951B true CN101225951B (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100365161A Expired - Fee Related CN101225951B (en) | 2007-01-17 | 2007-01-17 | Computer control rotary regenerative air preheater with controllable heat exchange capability |
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| Country | Link |
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| CN (1) | CN101225951B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148219B (en) * | 2013-03-04 | 2015-06-17 | 章礼道 | Intelligent adjustable and flexible sealing system for rotary type air pre-heater |
| CN103914615B (en) * | 2014-03-14 | 2017-01-04 | 上海交通大学 | A kind of rotary regenerative air heater temperature field On-line Estimation method of band self-correcting function |
| CN108870432B (en) * | 2018-05-11 | 2020-03-10 | 宁夏马连富电力科技有限公司 | Method for reducing rotor ash blockage of rotary air preheater with heating surface |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1602812A (en) * | 1977-03-02 | 1981-11-18 | Michigan Oven Co | Industrial oven |
| JP2000274994A (en) * | 1999-03-25 | 2000-10-06 | Toyota Motor Corp | Heat exchanger |
| CN1598469A (en) * | 2004-09-04 | 2005-03-23 | 王卫东 | Spoke type sealing device for rotary air preheater |
-
2007
- 2007-01-17 CN CN2007100365161A patent/CN101225951B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1602812A (en) * | 1977-03-02 | 1981-11-18 | Michigan Oven Co | Industrial oven |
| JP2000274994A (en) * | 1999-03-25 | 2000-10-06 | Toyota Motor Corp | Heat exchanger |
| CN1598469A (en) * | 2004-09-04 | 2005-03-23 | 王卫东 | Spoke type sealing device for rotary air preheater |
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| Publication number | Publication date |
|---|---|
| CN101225951A (en) | 2008-07-23 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20180117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |