CN108870433A - A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus - Google Patents
A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus Download PDFInfo
- Publication number
- CN108870433A CN108870433A CN201810619474.2A CN201810619474A CN108870433A CN 108870433 A CN108870433 A CN 108870433A CN 201810619474 A CN201810619474 A CN 201810619474A CN 108870433 A CN108870433 A CN 108870433A
- Authority
- CN
- China
- Prior art keywords
- air
- air preheater
- rotary regenerative
- hearsay
- preheater
- 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.)
- Pending
Links
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 25
- 230000035571 calor Effects 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000003517 fume Substances 0.000 claims abstract description 9
- 239000000284 extract Substances 0.000 claims description 3
- 230000035900 sweating Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
-
- 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
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- 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
- 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 relates to a kind of rotary regenerative air preheater calor innatus hearsay to pass anti-block apparatus, including Secondary Air entrance bellows, and the Secondary Air entrance bellows are divided into heating compartment and cold secondary wind cabin by fanning strip, and the heating compartment is arranged close to fume side；The heating compartment is connect by circulation line with air preheater First air outlet conduits, for being heated, being washed away to the heat exchange element by the heating compartment higher than 300 DEG C of heat primary air from the extraction of First air outlet conduits for power using pressure difference between heat primary air and cold Secondary Air.The present invention can thoroughly eliminate air preheater cold-end air heat exchange element surface sweating and be stained with grey ability, fundamentally solve rotary regenerative air preheater blockage problem by heating to air preheater Secondary Air side cold end heat exchange element.
Description
Technical field
The present invention relates to a kind of hot Secondary Air circulation anti-block apparatus more particularly to a kind of rotary regenerative air preheater calor innatus
Hearsay passs anti-block apparatus.
Background technique
Air preheater is exactly that the flue gas in boiler back end ductwork passes through internal cooling fin for the air before entering boiler
It is preheating to the heating surface of certain temperature, is a kind of for improving the heat exchange performance of boiler, the equipment for reducing energy consumption.Power station
For boiler frequently with heating surface rotary preheater, application in the boiler is generally Liang Fencang, San Fencang, four warehouse separated types, wherein
Four points of storehouses are more common in circulating fluidized bed boiler.
Since air preheater rotor is constantly rotated in operational process, when heat accumulation plate turns to fume side temperature gradually on
It rises, hereafter heat accumulation plate enters air side, is cooled in air side, temperature is gradually reduced.When accumulation of heat passes again to fume side,
Vapor and sulfuric acid in flue gas condense on cold end heat exchange element, adhere to ash content, and chemistry occurs for the salt in sulfuric acid and ash content
Variation, the ackd salt toughness of generation aggravate dust stratification；On the other hand, it is increasingly stringenter with environment protection emission index, station boiler is equal
It is configured with SCR denitration equipment, after SCR denitration equipment is added in air preheater upstream, since the amount of ammonia in SCR is difficult to control
System, causes the escape of a part of ammonia, can be with the SO in flue gas3It is reacted with vapor and generates (NH4)HSO4, (NH4)HSO4With
Condensation binding ability on air preheater cold-end air heat exchange element is extremely strong, and air preheater heat exchange element surface area is further aggravated
Ash blocking.
Since air preheater blocks, air preheater fume side and air-side blockage is caused to increase, thus derive with
Lower problem：
(1) air preheater resistance increases the safety for seriously affecting unit operation, and the non-occurrence probability that stops of unit greatly increases；
(2) air preheater resistance raising causes air-introduced machine allowance deficiency to reduce unit on-load ability；
(3) air preheater resistance increases caused primary air fan, pressure fan and air-introduced machine power consumption and increases；
(4) air preheater, which blocks up ash, causes heat exchange element surface contamination to reduce air preheater exchange capability of heat；
(5) air preheater frequency of soot blowing raising causes air preheater hot end heat exchange element blow loss serious；
(6) air preheater cold end wall temperature is too low causes air preheater cold end heat exchange element to lead to the problem of low-temperature corrosion；
(7) air preheater water flushing causes air preheater cold end heat exchange element well damage, reduces service life of equipment.
Summary of the invention
The object of the present invention is to provide a kind of rotary regenerative air preheater calor innatus hearsay to pass anti-block apparatus, to solve by sky
The low basic reason for leading to Ash Blocking in Air Preheater of air preheater air side cold end heat exchange element temperature is started with, by pre- to air
Hot device Secondary Air side cold end heat exchange element is heated, and is thoroughly eliminated air preheater cold-end air heat exchange element surface sweating and is stained with grey energy
Power fundamentally solves rotary regenerative air preheater blockage problem.
The present invention provides a kind of rotary regenerative air preheater calor innatus hearsay to pass anti-block apparatus, including Secondary Air enters one's intention as revealed in what one says
Case, Secondary Air entrance bellows are divided into heating compartment and cold secondary wind cabin by fanning strip, and heating compartment is arranged close to fume side；Add
Hot compartment connect by circulation line with air preheater First air outlet conduits, for utilize heat primary air and cold Secondary Air it
Between pressure difference be power from First air outlet conduits extract higher than 300 DEG C heat primary air to by heating compartment heat exchange element
It heated, washed away.
Further, circulation line is equipped with the electric control valve for adjusting the heat primary air air quantity extracted.
Further, the input end of circulation line and outlet end are equipped with electronic shut-off valve.
Further, circulation line is equipped with pressure sensor, temperature sensor and flow sensor.
According to the above aspect of the present invention, anti-block apparatus is passed by rotary regenerative air preheater calor innatus hearsay, to air preheater two
Secondary wind side cold end heat exchange element is heated, and is thoroughly eliminated air preheater cold-end air heat exchange element surface sweating and is stained with grey ability, from
Fundamentally solves rotary regenerative air preheater blockage problem.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is that schematic diagram is transformed in rotary regenerative air preheater ontology；
Fig. 2 is the structural schematic diagram that rotary regenerative air preheater calor innatus hearsay of the present invention passs anti-block apparatus.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
It is determined by rotary regenerative air preheater ontological property, heat primary air pressure parameter is 10kPa~12kPa, cold secondary
Wind pressure force parameter is 1kPa~3kPa, and it is power that the present apparatus, which utilizes pressure difference between heat primary air and cold Secondary Air, will be partially high
It is delivered to Secondary Air cold end heating compartment in 300 DEG C of heat primary airs, to solve air preheater air side cold end heat exchange element
The basic reason of this low Ash Blocking in Air Preheater of temperature is started with, by air preheater Secondary Air side cold end heat exchange element into
Row heating thoroughly eliminates air preheater cold-end air heat exchange element surface sweating and is stained with grey ability, fundamentally solves rotary air
Preheater blockage problem.
Join shown in Fig. 1, to rotary regenerative air preheater Secondary Air side storehouse every being transformed, by former air preheater Secondary Air entrance
Bellows are transformed, as air preheater rotation direction increases one piece of fanning strip 1 newly close to fume side in Secondary Air side entrance, from
Secondary Air side is separated out the heating compartment 2 of certain angle, and individually a corresponding inlet bellows, former cold Secondary Air enter heating compartment 2
Mouth is contracted to newly-increased 1 outside of fanning strip.
Join shown in Fig. 2, rotary regenerative air preheater calor innatus hearsay provided in this embodiment passs anti-block apparatus, including secondary
Wind entrance bellows, Secondary Air entrance bellows are divided into heating compartment 2 and cold secondary wind cabin 3 by fanning strip 1, and heating compartment 2 is close
Fume side setting；Heating compartment 2 is connect by circulation line 4 with air preheater Secondary Air outlet conduits, and heat primary air is utilized
Pressure difference (natural pressure difference) is the heat one that power extracts that a part is higher than 300 DEG C from Secondary Air outlet conduits between cold Secondary Air
Secondary wind is delivered to heating compartment 2, is heated, is washed away to the heat exchange element by heating compartment 2.Heat primary air extraction amount can root
It is calculated according to actual set operating condition and air preheater performance parameter.
In the present embodiment, circulation line 4 is equipped with the electric control valve 5 for adjusting the heat primary air air quantity extracted.
In the present embodiment, the input end of circulation line 4 and outlet end are equipped with electronic shut-off valve 6.
In the present embodiment, circulation line 4 is equipped with pressure sensor, temperature sensor and flow sensor, is used for medium
Temperature, pressure and flow monitoring.Pressure sensor, temperature sensor and flow sensor are arranged in pressure, temperature, flow measuring point
7。
The operation method that the rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus includes：
1) control of heat primary air internal circulating load
The present apparatus be arranged electric control valve to extract heat primary air amount control, regulating degree using air preheater pressure difference as
Guidance feedback, makes air preheater fume side pressure difference be maintained at the setting value of this technology or less.
2) hot-air blowing
Since the heat primary air pressure in the present apparatus is higher, while it is smaller with flow area to heat compartment, and air preheater heats compartment
Middle highest circulated air scooter 62m/s, by formulating regular purge plan, according to practical retrofitted unit parameter, periodic adjustment is extremely
Maximum hot air flow carries out purge operations to rotary regenerative air heater heat exchange element by high speed hot wind, keeps heat exchange element surface
It is clean.
Rotary regenerative air preheater calor innatus hearsay provided in this embodiment is passed anti-block apparatus and is had the following technical effect that：
1) present apparatus can carry out the tune of heat primary air flow according to the temperature of rotary regenerative air preheater cold end heat exchange element
Section improves air preheater cold-end air heat exchange element temperature, from root using (NH4) HSO4 on hot wind dissolution heat exchange element surface
The stifled ash of rotary regenerative air preheater is solved the problems, such as in sheet.
2) present apparatus can pass through high speed hot wind according to practical retrofitted unit parameter, periodic adjustment to maximum hot air flow
Purge operations are carried out to rotary regenerative air heater heat exchange element, keep heat exchange element clean surface.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus, which is characterized in that including Secondary Air entrance bellows,
The Secondary Air entrance bellows are divided into heating compartment by fanning strip and cold secondary wind cabin, the heating compartment are set close to fume side
It sets；The heating compartment connect by circulation line with air preheater First air outlet conduits, for utilize heat primary air and
Pressure difference is that power extracts the heat primary air for being higher than 300 DEG C from First air outlet conduits to by the heating between cold Secondary Air
The heat exchange element of compartment is heated, is washed away.
2. rotary regenerative air preheater calor innatus hearsay according to claim 1 passs anti-block apparatus, which is characterized in that described
Circulation line is equipped with the electric control valve for adjusting the heat primary air air quantity extracted.
3. rotary regenerative air preheater calor innatus hearsay according to claim 2 passs anti-block apparatus, which is characterized in that described
The input end of circulation line and outlet end are equipped with electronic shut-off valve.
4. rotary regenerative air preheater calor innatus hearsay according to claim 3 passs anti-block apparatus, which is characterized in that described
Circulation line is equipped with pressure sensor, temperature sensor and flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619474.2A CN108870433A (en) | 2018-06-12 | 2018-06-12 | A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619474.2A CN108870433A (en) | 2018-06-12 | 2018-06-12 | A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108870433A true CN108870433A (en) | 2018-11-23 |
Family
ID=64339069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810619474.2A Pending CN108870433A (en) | 2018-06-12 | 2018-06-12 | A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108870433A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306568A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Device and method for relieving blockage of rotary air preheater by preheating heat storage element through hot air |
| CN112555889A (en) * | 2020-12-24 | 2021-03-26 | 重庆大唐国际石柱发电有限责任公司 | Air preheater anti-blocking hot air recirculation system |
| CN112577064A (en) * | 2020-11-11 | 2021-03-30 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure capable of introducing hot air in sections and working method thereof |
| CN113503556A (en) * | 2021-05-28 | 2021-10-15 | 大唐长春第三热电厂 | Heating and purging system for heat transfer element of independent bin-divided type air preheater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2742488A1 (en) * | 2010-06-14 | 2011-12-14 | Alstom Technology Ltd | Regenerative air preheater design to reduce cold end fouling |
| CN204853539U (en) * | 2015-07-16 | 2015-12-09 | 成都融科能源环境工程有限公司 | System for utilize hot -blast recycling to get rid of air preheater hydrogen sulfate ammonia |
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| 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 |
| CN107842872A (en) * | 2017-09-11 | 2018-03-27 | 大唐东北电力试验研究所有限公司 | Rotary regenerative air preheater and its subtract the obstruction-proof method that leaks out |
| CN208595552U (en) * | 2018-06-12 | 2019-03-12 | 大唐东北电力试验研究院有限公司 | A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus |
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2018
- 2018-06-12 CN CN201810619474.2A patent/CN108870433A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2742488A1 (en) * | 2010-06-14 | 2011-12-14 | Alstom Technology Ltd | Regenerative air preheater design to reduce cold end fouling |
| CN204853539U (en) * | 2015-07-16 | 2015-12-09 | 成都融科能源环境工程有限公司 | System for utilize hot -blast recycling to get rid of air preheater hydrogen sulfate ammonia |
| CN105864816A (en) * | 2016-05-06 | 2016-08-17 | 华电电力科学研究院 | System and method for inhibiting AH blockage due to ABS solidification through hot primary air countercurrent circulation |
| 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 |
| CN107842872A (en) * | 2017-09-11 | 2018-03-27 | 大唐东北电力试验研究所有限公司 | Rotary regenerative air preheater and its subtract the obstruction-proof method that leaks out |
| CN208595552U (en) * | 2018-06-12 | 2019-03-12 | 大唐东北电力试验研究院有限公司 | A kind of rotary regenerative air preheater calor innatus hearsay passs anti-block apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306568A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Device and method for relieving blockage of rotary air preheater by preheating heat storage element through hot air |
| CN112577064A (en) * | 2020-11-11 | 2021-03-30 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure capable of introducing hot air in sections and working method thereof |
| CN112577064B (en) * | 2020-11-11 | 2023-04-28 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure with hot air introduced in sections and working method thereof |
| CN112555889A (en) * | 2020-12-24 | 2021-03-26 | 重庆大唐国际石柱发电有限责任公司 | Air preheater anti-blocking hot air recirculation system |
| CN113503556A (en) * | 2021-05-28 | 2021-10-15 | 大唐长春第三热电厂 | Heating and purging system for heat transfer element of independent bin-divided type air preheater |
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Application publication date: 20181123 |
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