CN108826349A - Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater - Google Patents
Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater Download PDFInfo
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- CN108826349A CN108826349A CN201810598961.5A CN201810598961A CN108826349A CN 108826349 A CN108826349 A CN 108826349A CN 201810598961 A CN201810598961 A CN 201810598961A CN 108826349 A CN108826349 A CN 108826349A
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- Prior art keywords
- air
- rotary regenerative
- anthracite
- heat primary
- circulating fan
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- 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 27
- 239000002802 bituminous coal Substances 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000003517 fume Substances 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000035900 sweating Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 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
- 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
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 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
- 239000000284 extract Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000000737 periodic effect Effects 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
Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater the present invention relates to a kind of, including First air entrance bellows, First air entrance bellows are divided into heating compartment and a cold wind cabin by fanning strip, and heating compartment is arranged close to fume side；Heating compartment is connect by circulating fan with air preheater First air outlet conduits, is heated, is washed away to the heat exchange element by heating compartment for the heat primary air by circulating fan from the extraction of First air outlet conduits higher than 300 DEG C.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 First air side cold end heat exchange element.
Description
Technical field
The present invention relates to a kind of heat primary airs to recycle anti-block apparatus, more particularly to one kind is based on using bituminous coal, anthracite pot
The heat primary air of furnace rotary regenerative air heater recycles 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
It is followed the object of the present invention is to provide a kind of based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater
Ring anti-block apparatus, to solve to lead to the basic of Ash Blocking in Air Preheater by air preheater air side cold end heat exchange element temperature is low
Reason is started with, and by heating to air preheater First air side cold end heat exchange element, thoroughly eliminates air preheater cold-end air
Heat exchange element surface sweating is stained with grey ability, fundamentally solves rotary regenerative air preheater blockage problem.
It is anti-blocking based on the heat primary air circulation for using bituminous coal, anthracite-fired boiler rotary regenerative air heater that the present invention provides a kind of
Device, including First air entrance bellows, First air entrance bellows are divided into heating compartment and a cold wind cabin, heating by fanning strip
Compartment is arranged close to fume side；Heating compartment is connect by circulating fan with air preheater First air outlet conduits, for leading to
Circulating fan is crossed to carry out the heat exchange element by heating compartment from the heat primary air that First air outlet conduits are extracted higher than 300 DEG C
It heats, wash away.
Further, circulating fan blade surface application has abrasion-resistant lining plate.
Further, circulating fan arrival end air duct is equipped with ash bucket, and ash bucket is equipped with automatic ash-removing device.
Further, circulating fan is frequency conversion fan, for carrying out the adjusting of heat primary air internal circulating load using frequency control.
Further, circulating fan arrival end air duct and outlet end air duct are equipped with electric butterfly valve.
Further, circulating fan is equipped with the temperature sensor for monitoring fan bearing temperature, circulating fan outlet end
Equipped with for monitoring outlet medium temperature, the temperature of pressure, pressure sensor.
According to the above aspect of the present invention, anti-by being recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater
Block apparatus heats air preheater First air side cold end heat exchange element, thoroughly eliminates air preheater cold-end air heat exchange member
Part surface sweating is stained with grey ability, 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 that the present invention is based on the heat primary airs for using bituminous coal, anthracite-fired boiler rotary regenerative air heater to recycle anti-block apparatus
Structural schematic diagram.
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.
Bituminous coal, anthracite generating set boiler are used, it is lower due to actually using coal moisture, lead to boiler combustion process
Middle primary air ratio is smaller, and primary air flow allowance is high.It analyzes after study, the present invention is based on using, bituminous coal unit boiler First air is abundant
On the basis of amount is high, directly divides heating compartment in rotary regenerative air preheater First air side by heating power accounting and carry out heat once
Wind circulating-heating is anti-blocking.
Join shown in Fig. 1, to rotary regenerative air preheater First air side storehouse every being transformed, by former air preheater First air entrance
Bellows are transformed, as air preheater rotation direction increases one piece of fanning strip 1 newly close to fume side in First air side entrance, from
First air side is separated out the heating compartment 2 of certain angle, and individually a corresponding inlet bellows, former cold First air enter heating compartment 2
Mouth is contracted to newly-increased 1 outside of fanning strip.
Join shown in Fig. 2, it is provided in this embodiment based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater
Anti-block apparatus, including First air entrance bellows are recycled, First air entrance bellows are divided into heating compartment 2 and cold one by fanning strip 1
Secondary wind cabin 3, heating compartment 2 are arranged close to fume side；Compartment 2 is heated to export by circulating fan 4 and air preheater First air
Air duct connection extracts heat primary air of a part higher than 300 DEG C from First air outlet conduits by circulating fan 4 and is delivered to heating
Compartment 2 heats the heat exchange element by heating compartment 2, is washed away.Heat primary air extraction amount can be run according to actual set
Situation and air preheater performance parameter are calculated.
In the present embodiment, 4 blade surface of circulating fan application has abrasion-resistant lining plate, with abrasionproof characteristic, reduces and adds
Abrasion of the ash content carried in hot compartment to blower improves circulating fan operation stability.
In the present embodiment, 4 arrival end air duct of circulating fan is equipped with ash bucket, and ash bucket is equipped with automatic (control) cinerary device,
Carry out regular ash discharge.
In the present embodiment, circulating fan 4 is frequency conversion fan, for carrying out heat primary air internal circulating load tune using frequency control
Section.
In the present embodiment, 4 arrival end air duct of circulating fan and outlet end air duct are equipped with electric butterfly valve 5.
In the present embodiment, circulating fan 4 is equipped with the temperature sensor for monitoring fan bearing temperature, and circulating fan goes out
Mouth end is equipped with for monitoring outlet medium temperature, the temperature of pressure, pressure sensor.
This includes based on the operation method that the heat primary air for using boiler using brown coal rotary regenerative air heater recycles anti-block apparatus：
1) control of heat primary air internal circulating load
Circulating fan (booster fan) use frequency control (adjusting of 380V motor frequency change), by adjusting rotation speed of fan into
Row is the adjusting of heat primary air internal circulating load, and regulating degree is fed back using air preheater pressure difference as guidance, makes air preheater fume side pressure difference
It is maintained at the setting value of this technology or less.
2) hot-air blowing
Since the circulating fan in device uses frequency control, while it is smaller with flow area to heat compartment, air preheater heating
Highest circulated air scooter 62m/s in compartment, according to practical retrofitted unit parameter, is periodically adjusted by formulating regular purge plan
Section carries out purge operations to rotary regenerative air heater heat exchange element by high speed hot wind, keeps heat exchange to maximum hot wind circular flow
Element surface is clean.
It is provided in this embodiment to be had based on the heat primary air circulation anti-block apparatus for using boiler using brown coal rotary regenerative air heater
Following technical effect：
1) present apparatus can carry out heat primary air internal circulating load according to the temperature of rotary regenerative air preheater cold end heat exchange element
It adjusts, using (the NH on hot wind dissolution heat exchange element surface4)HSO4, air preheater cold-end air heat exchange element temperature is improved, from root
The stifled ash of rotary regenerative air preheater is solved the problems, such as in sheet.
2) present apparatus can pass through high speed according to practical retrofitted unit parameter, periodic adjustment to maximum hot wind circular flow
Hot wind carries out purge operations to rotary regenerative air heater heat exchange element, keeps 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 (6)
1. a kind of recycle anti-block apparatus based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater, feature exists
In, including First air entrance bellows, the First air entrance bellows are divided by fanning strip heats compartment and a cold wind cabin, institute
Heating compartment is stated to be arranged close to fume side；The heating compartment is connected by circulating fan and air preheater First air outlet conduits
It connects, for extracting the heat primary air higher than 300 DEG C to passing through the heating from First air outlet conduits by the circulating fan
The heat exchange element of compartment is heated, is washed away.
2. according to claim 1 recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater is prevented
Block apparatus, which is characterized in that the circulating fan blade surface application has abrasion-resistant lining plate.
3. according to claim 2 recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater is prevented
Block apparatus, which is characterized in that circulating fan arrival end air duct is equipped with ash bucket, and the ash bucket is equipped with automatic ash-removing device.
4. according to claim 3 recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater is prevented
Block apparatus, which is characterized in that the circulating fan is frequency conversion fan, for carrying out heat primary air internal circulating load tune using frequency control
Section.
5. according to claim 4 recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater is prevented
Block apparatus, which is characterized in that circulating fan arrival end air duct and outlet end air duct are equipped with electric butterfly valve.
6. according to claim 5 recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater is prevented
Block apparatus, which is characterized in that the circulating fan is equipped with the temperature sensor for monitoring fan bearing temperature, the circulated air
Machine outlet end is equipped with for monitoring outlet medium temperature, the temperature of pressure, pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598961.5A CN108826349A (en) | 2018-06-12 | 2018-06-12 | Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598961.5A CN108826349A (en) | 2018-06-12 | 2018-06-12 | Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108826349A true CN108826349A (en) | 2018-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810598961.5A Pending CN108826349A (en) | 2018-06-12 | 2018-06-12 | Anti-block apparatus is recycled based on the heat primary air for using bituminous coal, anthracite-fired boiler rotary regenerative air heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN108826349A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500607A (en) * | 2019-08-21 | 2019-11-26 | 南京兆能节能科技有限公司 | A kind of dust-proof control block apparatus of rotary air preheater heat accumulating element and its dust-proof control blocking method |
| CN110513713A (en) * | 2019-08-21 | 2019-11-29 | 南京兆能节能科技有限公司 | A kind of rotary regenerative air preheater and its method for cleaning with clearing function |
| 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 |
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| 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 |
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Application publication date: 20181116 |