CN204345697U - The boiler air preheater of on-line rinsing - Google Patents
The boiler air preheater of on-line rinsing Download PDFInfo
- Publication number
- CN204345697U CN204345697U CN201420780780.1U CN201420780780U CN204345697U CN 204345697 U CN204345697 U CN 204345697U CN 201420780780 U CN201420780780 U CN 201420780780U CN 204345697 U CN204345697 U CN 204345697U
- Authority
- CN
- China
- Prior art keywords
- rotor
- guide rail
- air preheater
- housing
- unit
- 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.)
- Expired - Fee Related
Links
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
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses the boiler air preheater of a kind of on-line rinsing in fired power generating unit technical field, comprise housing, coordinate in housing and be provided with rotor, the upper and lower side of rotor shaft is supported on rotor field spider respectively, rotor is provided with the heat exchange element be made up of some grids, housing upper and lower sides is connected to flue gas flow channel, an air channel and secondary air duct, and rotor integral sealing blocks on the separation position of flue gas flow channel, an air channel and secondary air duct; Be provided with guide rail below rotor, guide rail is provided with high-pressure sprayer, is provided with roller bottom high-pressure sprayer, and roller is equipped with in guide rail.This device is by water under high pressure on-line rinsing, and during flushing, unit does not need load down, and denitrification apparatus does not need to stop transport, and has both met the requirement of environmental protection, also meets the allotment of scheduling to unit load simultaneously.Ensure that unit long-term operation, improve the operational reliability of unit.
Description
Technical field
The utility model relates to a kind of air preheater of boiler, particularly a kind of air preheater of the boiler for fired power generating unit.
Background technology
At present, because country is to the raising of environmental requirement, fired power generating unit was all carrying out denitration transformation in recent years.After increase denitrification apparatus, boiler air preheater carries out heating surface replacing simultaneously, and heat transfer element is all changed, and wherein the transformation of cold junction heat transfer element is replaced by enamel material element, and along with the growth of unit operation time, air preheater differential pressure can rise.
Adopt the unit of denitrating system, when winter environment temperature is low, when underload, exhaust gas temperature is also lower, and minimum cold junction mean temperature controls sometimes not reach design load requirement, when amount of ammonia slip is large, and NH
3and SO
3concentration is high, escape ammonia and sulfuric acid reaction generate than normally much more ammonium hydrogen sulfate, hydrogen sulfate ammonia is in a liquid state at air preheater middle-temperature section, and liquid sulfuric acid hydrogen ammonia combines with the fly ash particle in flue gas and defines the extremely strong dust stratification melting salt-form of caking property, causes air preheater stifled ash in a large number.Traditional scheme is carried out water flushing after air preheater need being isolated and is solved the high problem of air preheater differential pressure.Its weak point is: unit is generally arranged in parallel two air preheaters, as ensured, unit normally runs, then isolate an air preheater and carry out off-line flushing, unit need be down to below 50% rated load and be run, and can affect the safety and economic operation of unit like this.
Utility model content
The purpose of this utility model is to provide a kind of boiler air preheater of on-line rinsing, when can ensure that unit normally runs, realizes the on-line rinsing of air preheater.
The purpose of this utility model is achieved in that a kind of boiler air preheater of on-line rinsing, comprise housing, coordinate in housing and be provided with rotor, the upper and lower side of rotor shaft is supported on rotor field spider respectively, rotor is provided with the heat exchange element be made up of some grids, housing upper and lower sides is connected to flue gas flow channel, an air channel and secondary air duct, and rotor integral sealing blocks on the position of separation up and down of flue gas flow channel, an air channel and secondary air duct; Be provided with guide rail below rotor, guide rail is provided with high-pressure sprayer, is provided with roller bottom high-pressure sprayer, and roller is equipped with in guide rail.
During the work of this device, rotor rotates, when flue gas is through rotor local, heat in flue gas passes to rotor, now rotor heat absorption, when the rotor local after absorbing heat turns to air channel, secondary air duct opposite position, rotor heat release, the heat absorbed passes to First air and Secondary Air, and because epitrochanterian grid is circle distribution, there is partial grid in any moment at heat absorption, partial grid in heat release; Therefore, can preheating of air be realized, when the pressure reduction that rotor is upper and lower is larger, shows that on rotor, dust stratification is serious, need to rinse, now, on rotor, spray High-Pressure Water by high-pressure sprayer, impact rotor, epitrochanterian dust stratification is come off; Water injector can along guide rail shift position, and make developing result more thorough, after flushing, before and after air preheater, pressure reduction can be down to normal level.The utility model is by water under high pressure on-line rinsing, and during flushing, unit does not need load down, and denitrification apparatus does not need to stop transport, and has both met the requirement of environmental protection, also meets the allotment of scheduling to unit load simultaneously.Avoid unit because of " unplanned outage " number of times produced when air preheater blocks serious, ensure that unit long-term operation, improve the operational reliability of unit.
For ensureing that structure is simple, and rinse more thorough, described guide rail is arranged along the radial direction of rotor in housing.During flushing, can from interior side direction outermost stepping displacement, also can slow continuous moving, rotor rotates, and can comprehensively rinse rotor from bottom to top.
Rinse for convenience of water injector shift position, described high-pressure sprayer is connected with high-pressure plunger delivery side of pump through flexible pipe.
During for ensureing to rinse, nozzle can by the water flow jet of high pressure on rotor, and the nozzle of described high-pressure sprayer is arranged upward.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
Fig. 2 is top view of the present utility model.
Fig. 3 is the structural representation after the utility model removes rotor and rotor field spider.
Wherein, 1 rotor field spider, 2 rotor shafts, 3 grids, 4 housings, 5 flexible pipes, 6 high-pressure plunger pumps, 7 rollers, 8 high-pressure sprayers, 9 guide rails, 10 air channels, 11 secondary air ducts, 12 flue gas flow channels.
Detailed description of the invention
As Figure 1-3, for a kind of boiler air preheater of on-line rinsing, coordinate in its housing 4 and be provided with rotor, the upper and lower side of rotor shaft 2 is supported on rotor field spider 1 respectively, rotor is provided with the heat exchange element be made up of some grids 3, the local of grid 3 is only shown in Fig. 2, and housing 4 upper and lower sides is connected to flue gas flow channel 12, air channel 10 and secondary air duct 11, and rotor integral sealing blocks on the position of separation up and down of flue gas flow channel 12, air channel 10 and secondary air duct 11; Be provided with guide rail 9 below rotor, guide rail 9 is provided with high-pressure sprayer 8, is provided with roller 7 bottom high-pressure sprayer 8, and roller 7 is equipped with in guide rail 9; High-pressure sprayer 8 is connected through the outlet of flexible pipe 5 with high-pressure plunger pump 6, and the nozzle of high-pressure sprayer 8 is arranged upward.Guide rail 9 is arranged along the radial direction of rotor in housing 4.
This device is when carrying out high pressure water washing, and water pressure controls at 30MPa, flow-control at 3t/h, the good industry water of water under high pressure choosing source water quality.Before high pressure washing water system is set up, operations staff should confirm that the former soot blower system valve of air preheater is in closed condition, formerly blows grey program stopped.One-sidedly to rinse, exit the unit AGC method of operation.Do not need to exit air preheater during flushing to run, stop air preheater steam soot blowing.Check industrial water system normal operation, high-pressure sprayer 8 moves back each 0.025m by inner step outward, and the inner side point time of staying is initially 10 minutes, every step outward moves back 10 times, increase by 5 minutes washing times, until step retreats to air preheater outermost, complete once flushing flow process.According to air preheater differential pressure situation of change, determine flushing cycle or time.Between air preheater flush period, notice that air preheater inside answers collisionless sound and air preheater fume side to discharge water the inspection of situation; After air preheater artificial flushing terminates, drain air and flue system water.Online water rinses and covers a flow process, and about washing time is 79 hours, and primary air pressure shaking amplitude is little, and furnace pressure fluctuation scope recovers normal, and developing result is good.
The utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some to some technical characteristics wherein to replace and distortion, these are replaced and are out of shape all in protection domain of the present utility model.
Claims (4)
1. the boiler air preheater of an on-line rinsing, it is characterized in that comprising housing, coordinate in housing and be provided with rotor, the upper and lower side of rotor shaft is supported on rotor field spider respectively, rotor is provided with the heat exchange element be made up of some grids, housing upper and lower sides is connected to flue gas flow channel, an air channel and secondary air duct, and rotor integral sealing blocks on the position of separation up and down of flue gas flow channel, an air channel and secondary air duct; Be provided with guide rail below rotor, guide rail is provided with high-pressure sprayer, is provided with roller bottom high-pressure sprayer, and roller is equipped with in guide rail.
2. the boiler air preheater of on-line rinsing according to claim 1, is characterized in that: described guide rail is arranged along the radial direction of rotor in housing.
3. the boiler air preheater of on-line rinsing according to claim 1 and 2, is characterized in that: described high-pressure sprayer is connected with high-pressure plunger delivery side of pump through flexible pipe.
4. the boiler air preheater of on-line rinsing according to claim 1 and 2, is characterized in that: the nozzle of described high-pressure sprayer is arranged upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420780780.1U CN204345697U (en) | 2014-12-12 | 2014-12-12 | The boiler air preheater of on-line rinsing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420780780.1U CN204345697U (en) | 2014-12-12 | 2014-12-12 | The boiler air preheater of on-line rinsing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204345697U true CN204345697U (en) | 2015-05-20 |
Family
ID=53228962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420780780.1U Expired - Fee Related CN204345697U (en) | 2014-12-12 | 2014-12-12 | The boiler air preheater of on-line rinsing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204345697U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526598A (en) * | 2016-01-26 | 2016-04-27 | 华北电力大学 | Low-exergy-loss bypass type primary air temperature regulating system |
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN108871046A (en) * | 2018-05-21 | 2018-11-23 | 合力正华（北京）工程技术有限公司 | Automatic purging system and automatic blow-washing method |
-
2014
- 2014-12-12 CN CN201420780780.1U patent/CN204345697U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526598A (en) * | 2016-01-26 | 2016-04-27 | 华北电力大学 | Low-exergy-loss bypass type primary air temperature regulating system |
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN108871046A (en) * | 2018-05-21 | 2018-11-23 | 合力正华（北京）工程技术有限公司 | Automatic purging system and automatic blow-washing method |
| CN108871046B (en) * | 2018-05-21 | 2020-06-30 | 合力正华（北京）工程技术有限公司 | Automatic purging system and automatic purging method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102042605B (en) | Side-to-side thermal deashing method for rotary air preheater | |
| CN107062957A (en) | Shell and tube fluoroplastics flue gas flue gas heat-exchange unit | |
| CN202860549U (en) | Flue gas SCR denitration catalyst online cleaning and activating process system | |
| CN109966812A (en) | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling | |
| CN204345697U (en) | The boiler air preheater of on-line rinsing | |
| CN104006401A (en) | Power station boiler smoke waste heat deep recycling and emission reducing system | |
| CN205182484U (en) | Energy -efficient SOx/NOx control dust pelletizing system | |
| CN204952337U (en) | Wet flue gas desulfurization heat pipe formula heat transfer defogging device | |
| CN205746958U (en) | Air preheater hot blast adverse current in coal-burning power plant is the most anti-blocking and the system of corrosion | |
| CN205066555U (en) | Solve online rinse -system of intelligence of stifled ash of air heater | |
| CN104307362A (en) | Convenient and efficient moveable type SCR denitration device | |
| CN205746956U (en) | The system of heat primary air circulated in countercurrent suppression ABS frozen plug AH | |
| CN202962189U (en) | Defroster flushing water system of wet-method smoke desulfuration system | |
| CN205235731U (en) | Modular denitrification facility | |
| CN101914778A (en) | Microwave heating device for heating cold-rolling pickling process medium | |
| CN201764834U (en) | Utilization and treatment device for industrial kiln fume | |
| CN204730235U (en) | A kind of high-pressure water flushing device for air preheater, air preheating system | |
| CN103303876A (en) | Waste-heat recovery method in making acid by using pyrite | |
| CN203635222U (en) | Catalyst regeneration device for solidifying active matter by utilizing overheated vapor | |
| CN205690963U (en) | Rotary regenerative air preheater and high-head low discharge non-isolated on-line cleaning device thereof | |
| CN105381695A (en) | Energy-efficient desulfurization and denitrification dust removal system | |
| CN202057204U (en) | Waste gas desulfuration and dust control device of carbon calcining furnace | |
| CN204485652U (en) | A kind of low-temperature denitration reactor | |
| CN203530365U (en) | Annealing furnace flue waste heat recovering device | |
| CN207351232U (en) | A kind of coking flue gas purification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20161212 |