CN108800192A - A kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method - Google Patents
A kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method Download PDFInfo
- Publication number
- CN108800192A CN108800192A CN201810429667.1A CN201810429667A CN108800192A CN 108800192 A CN108800192 A CN 108800192A CN 201810429667 A CN201810429667 A CN 201810429667A CN 108800192 A CN108800192 A CN 108800192A
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- CN
- China
- Prior art keywords
- air preheater
- storehouse
- hot cigarette
- fanning strip
- rotary regenerative
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The present invention proposes a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method, including fanning strip, draws smoke pipeline, high temperature resistant frequency conversion wind turbine and control unit.Wherein, the inside of rotary regenerative air preheater is divided into flue gas storehouse and air bin (air bin of three warehouse separated type air preheaters is divided into a wind cabin and secondary wind cabin).The fanning strip is placed in the outlet of air preheater flue gas storehouse, and fanning strip is with rotor lower face close to close to rotor back-out side；It is that hot cigarette divides storehouse that the fanning strip and rotor, which screw out the space among the main fanning strip of side,；Hot cigarette point storehouse is connected with smoke pipeline outlet is drawn；It is described draw high temperature resistant frequency conversion wind turbine is in series on smoke pipeline；The high temperature resistant frequency conversion wind turbine is connected with described control unit.High-temperature flue gas is sent to air preheater heat accumulating element temperature lower region by this method by drawing smoke pipeline, prevents sulfureous in flue gas acid hydrogen ammonia in this area deposition, to have the function that prevent air preheater from blocking.
Description
Technical field
The present invention relates to the anti-blocking gray technology fields of rotary regenerative air preheater in power station equipment boiler back end ductwork, especially
It is the hardened NH of rotary regenerative air preheater cold end caused by for being transformed due to Denitration in Boiler4HSO4Caused stifled grey problem.
Background technology
According to national environmental protection portion about publication《Thermal power plant's pollution prevention technique policy》Bulletin（Bulletin 2017 years the
No. 1）Content provided, coal-burning power plant's prevention and control of air pollution should be to implement qualified discharge as basic demand, to implement in full ultralow row
It puts as target.And in order to realize the minimum discharge target of NOx, power plant carries out denitration transformation one after another, and wherein most common method
It is by putting into a large amount of NH3The discharge capacity of NOx in flue gas is greatly reduced.A large amount of NH3Input causes ammonia in back-end ductwork
Escape amount increases, especially when burning high sulfur coal kind, NH3Easily with the SO in flue gas3Reaction generates NH4HSO4, swinging air
Preheater cold end is as being less than NH4HSO4Dew-point temperature, then rotary regenerative air preheater cold end be also easy to produce liquid NH4HSO4And it is hardened
Dust stratification makes rotary regenerative air preheater block, and seriously affects the safety and economic operation of unit.
In actual moving process, rotary regenerative air preheater blocks up ash and has become each power plant's common problem.So far
Until, no one of existing known technology improvement cost is low, operational effect is good, can be by universally recognized anti-blocking grey skill in the industry
Art.
Patent 201610722752.8 proposes a kind of device for removing air preheater cold-end air dust stratification after SCR system puts into operation
And method, this method by heat smoke be added air preheater entire exhanst gas outlet cold end to improve cold end heat accumulating element temperature, by
It is huge in entire flue gas storehouse surface product, comparatively small part of smoke is introduced wherein to heat cold end heat accumulating element, this method
It is very limited to the promotion of air preheater cold junction temperature, anti-blocking ash effect unobvious.
The rotary regenerative air preheater and its subtract leak out obstruction-proof method and patent that patent 201710812701.9 proposes
201710811400.4 rotary regenerative air preheaters proposed and its First air side subtract the obstruction-proof method that leaks out, and such method will
Moderate oven cigarette introduces wind cabin of air preheater cold end and secondary wind cabin, and required blower pressure is relatively high and be easy to cause flue gas
Leakage into primary and secondary air, heating location choose the improper air preheater heat exchange efficiency that also results in and are affected.
Invention content
The technical problem to be solved by the present invention is to provide one kind efficiently to prevent rotary regenerative air preheater because of NH4HSO4Plate
It ties and the device and method of dust stratification blocking.
In order to solve the above technical problems, a kind of hot cigarette anti-block apparatus of air preheater of present invention offer and method, including fan
Shape plate draws smoke pipeline, high temperature resistant frequency conversion wind turbine and control unit.Wherein, rotary regenerative air preheater is Junker formula air preheat
Device includes shell and rotor, and the internal chamber of air preheater is divided into flue gas storehouse and air bin（Three warehouse separated type air preheaters
Air bin can be divided into a wind cabin and secondary wind cabin again）.The fanning strip be placed in air preheater flue gas storehouse outlet, fanning strip with
Rotor lower face is close to close to rotor back-out side（I.e. rotor divides storehouse to screw out position along direction of rotation from air）；The fanning strip
The hot cigarette of composition of the channel among the main fanning strip of side is screwed out with rotor divides storehouse；Hot cigarette point storehouse is connected with smoke pipeline outlet is drawn；It is described
Draw and is in series with high temperature resistant frequency conversion wind turbine on smoke pipeline；At the medium temperature flue that the entrance for drawing smoke pipeline is arranged before preheater,
After economizer；The high temperature resistant frequency conversion wind turbine is connected with control unit.
On the outside of the fanning strip（In flue gas storehouse）It is provided with Non-contact Infrared Temperature Measurement device, temperature detection range 0
DEG C ~ 300 DEG C, the temperature of monitoring top heat accumulating element, infrared measurement of temperature signal accesses control unit.
Described control unit includes photoelectric coupled circuit, D/A converter, display module, microprocessor and control switch enclosure, micro- place
The control output end of reason device is connected with high temperature resistant frequency conversion wind turbine.
The high temperature resistant frequency conversion wind turbine inlet and outlet are equipped with control valve and pressure transmitter.
Compared with the relevant technologies, the hot cigarette anti-block apparatus of rotary regenerative air preheater provided by the invention is additionally arranged relatively independent
Hot cigarette divide storehouse so that be sent to rotary regenerative air preheater relatively by drawing the flue gas that smoke pipeline extracts at medium temperature flue
Small heat accumulating element low-temperature region makes the heat accumulating element temperature in the region be raised to the temperature of setting or more.Because using smaller cigarette
Tolerance is to the precisely heating of local heat accumulating element interval, so improving the efficiency of heating surface, has reached anti-non-return with minimum heat loss
The effect that rotary air preheater blocks.The present apparatus and method are drawn smoke pipeline entrance and can be arranged as required to before air preheater
Appropriate location, in order to install and construct.
Description of the drawings
Fig. 1 is the hot cigarette anti-block apparatus structural schematic diagram of present example rotary regenerative air preheater.Label in figure：1, it fans
Shape plate, 2, draw smoke pipeline, 3, high temperature resistant frequency conversion wind turbine, 4, control unit.
Specific implementation mode
With reference to the accompanying drawings of the specification, the present invention is described in detail.
As shown in Fig. 1：The hot cigarette anti-block apparatus of rotary regenerative air preheater of the present embodiment, including fanning strip 1, draw smoke pipe
Road 2, high temperature resistant frequency conversion wind turbine 3 and control unit 4.The upper surface of fanning strip 1 and rotor bottom are adjacent, fanning strip 1 and rotor rotation
The space gone out between the main fanning strip of side constitutes hot cigarette point storehouse, lower to be connected with the outlet for drawing smoke pipeline 2, draws smoke pipeline 2
It is in series with high temperature resistant frequency conversion wind turbine 3 between outlet and entrance, is drawn between the outlet of smoke pipeline 2 and high temperature resistant frequency conversion wind turbine 3, resistance to height
There are valve, 4 phase of control terminal and processing unit of high temperature resistant frequency conversion wind turbine 3 between warm frequency conversion fan 3 and the entrance for drawing smoke pipeline 2
Even, draw on the medium temperature flue that the entrance of smoke pipeline 2 is arranged before air preheater.The present embodiment need to be to original flue gas storehouse changeover portion
It is transformed, the hot cigarette point storehouse surface adjusted as needed between fanning strip 1 and main fanning strip is accumulated, and is closed according to the exhaust gas volumn calculated
Reason selection line size, type selecting wind turbine so just construct such flow path：Heat smoke is extracted out from medium temperature flue, resistance to
Under the driving of high temperature frequency conversion fan, from rotary regenerative air preheater lower part, it is pre- to flow through swinging air from the bottom up for heating flue import
Hot device rotor after being blended into rotary regenerative air preheater flue gas storehouse hot junction flue gas, then flows through air preheater rotor, from sky from top to bottom
The cold end outflow of air preheater flue gas storehouse.
The present invention the hot cigarette anti-block apparatus of rotary regenerative air heater and method, wherein the fan angle of fanning strip 1 be greater than to
The angle of few storehouse lattice, so that heat smoke flows upwardly through rotor and is prematurely leaked in flue gas storehouse.
The hot cigarette anti-block apparatus of rotary regenerative air heater and method of the present invention, wherein the sides near-thermal cigarette Fen Cang are leaned in flue gas storehouse
The infrared temperature measurement apparatus of monitoring heat exchange element temperature is provided at fanning strip.
The hot cigarette anti-block apparatus of rotary regenerative air heater and method of the present invention, wherein utilize and be higher than 300 DEG C in medium temperature flue
Flue gas heats the heat accumulating element just produced from air bin.
The hot cigarette anti-block apparatus of rotary regenerative air heater and method of the present invention, wherein resisting blower uses frequency control, leads to
The rotating speed for overregulating wind turbine carries out the adjusting of exhaust gas volumn, and regulating degree is guidance with the feedback temperature of above-mentioned infrared temperature measurement apparatus,
The wall temperature of the most cold place's heat accumulating element of rotary regenerative air preheater is set to be maintained at set temperature value or more.
Rotary regenerative air preheater includes using above-mentioned hot cigarette anti-block apparatus and method, the benefit obtained：1, it send, air inducing
Machine operation total current is greatly lowered；2, unit is run steadily in the long term, flue gas storehouse air preheater pressure difference maintain 120% design value with
It is interior；3, the pre- device inleakage of swinging air declines.
The foregoing is merely the exemplary embodiments of the present invention, are not intended to limit the present invention in any form；All one's own professions
The those of ordinary skill of industry, can be shown in by specification attached drawing and described above and swimmingly implement the present invention；This is not being departed from
The technical solution of invention and the equivalent variations for making differentiation are the equivalent embodiment of the present invention, should all belong to the power of the present invention
In the protection domain that sharp claim determines.
Claims (5)
1. a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method, it is characterised in that：Utilize rotary regenerative air preheater
Medium temperature flue gas in preceding flue heats heat accumulating element temperature lowest point.
2. a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method as described in claim 1, it is characterised in that：In cigarette
Fanning strip is placed at gas storehouse cold side outlet, the upper surface of fanning strip and rotor bottom are adjacent, the master of fanning strip and rotor back-out side
Fanning strip constitutes hot cigarette and storehouse, hot cigarette point storehouse is divided to flow through the entrance that rotor heats cold end heat accumulating element as medium temperature flue gas.
3. a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method as claimed in claim 2, it is characterised in that：Hot cigarette
Point storehouse is connected with smoke pipeline is drawn, and draws and is in series with resisting blower on smoke pipeline, will be higher than 300 in flue before air preheater using wind turbine
DEG C medium temperature flue gas be sent into the hot cigarette and divide storehouse.
4. a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method as claimed in claim 3, it is characterised in that：Resistance to height
Warm air machine is frequency conversion fan, and by the temperature feedback to cold end heat accumulating element, the rotating speed for adjusting wind turbine draws to adjust in smoke pipeline
By exhaust gas volumn.
5. a kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method as claimed in claim 4, it is characterised in that：In cigarette
Contactless infrared temperature measurement apparatus is equipped in gas storehouse at the fanning strip of the sides near-thermal cigarette Fen Cang, monitoring rotor will screw in flue gas point
The wall surface temperature of the heat accumulating element in storehouse, and feed back to control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810429667.1A CN108800192A (en) | 2018-05-08 | 2018-05-08 | A kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810429667.1A CN108800192A (en) | 2018-05-08 | 2018-05-08 | A kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108800192A true CN108800192A (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810429667.1A Pending CN108800192A (en) | 2018-05-08 | 2018-05-08 | A kind of hot cigarette anti-block apparatus of rotary regenerative air preheater and method |
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| CN (1) | CN108800192A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013377A (en) * | 2019-11-19 | 2020-04-17 | 华电电力科学研究院有限公司 | Independently adjustable anti-blocking structure and method for four-bin air preheater |
| CN112710004A (en) * | 2021-01-29 | 2021-04-27 | 西安热工研究院有限公司 | System and method for preventing ammonium bisulfate ash accumulation and blockage of rotary air preheater |
| CN114857961A (en) * | 2022-04-25 | 2022-08-05 | 内蒙古大板发电有限责任公司 | Power plant boiler system capable of preventing air preheater from being blocked |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204829997U (en) * | 2015-07-10 | 2015-12-02 | 清华大学 | Multichannel regenerative air preheater |
| CN107559876A (en) * | 2017-09-04 | 2018-01-09 | 孙孝禹 | The reduction of rotary regenerative air preheater is leaked out anti-blocking ash system and method |
| CN107655027A (en) * | 2017-09-11 | 2018-02-02 | 大唐东北电力试验研究所有限公司 | Rotary regenerative air preheater and its Secondary Air side subtract the obstruction-proof method that leaks out |
-
2018
- 2018-05-08 CN CN201810429667.1A patent/CN108800192A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204829997U (en) * | 2015-07-10 | 2015-12-02 | 清华大学 | Multichannel regenerative air preheater |
| CN107559876A (en) * | 2017-09-04 | 2018-01-09 | 孙孝禹 | The reduction of rotary regenerative air preheater is leaked out anti-blocking ash system and method |
| CN107655027A (en) * | 2017-09-11 | 2018-02-02 | 大唐东北电力试验研究所有限公司 | Rotary regenerative air preheater and its Secondary Air side subtract the obstruction-proof method that leaks out |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013377A (en) * | 2019-11-19 | 2020-04-17 | 华电电力科学研究院有限公司 | Independently adjustable anti-blocking structure and method for four-bin air preheater |
| CN112710004A (en) * | 2021-01-29 | 2021-04-27 | 西安热工研究院有限公司 | System and method for preventing ammonium bisulfate ash accumulation and blockage of rotary air preheater |
| CN114857961A (en) * | 2022-04-25 | 2022-08-05 | 内蒙古大板发电有限责任公司 | Power plant boiler system capable of preventing air preheater from being blocked |
| CN114857961B (en) * | 2022-04-25 | 2024-03-01 | 内蒙古大板发电有限责任公司 | Power plant boiler system for preventing air preheater from being blocked |
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Application publication date: 20181113 |