CN206055661U - A kind of controlling device of coal-fired power station boiler air preheater obstruction - Google Patents
A kind of controlling device of coal-fired power station boiler air preheater obstruction Download PDFInfo
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- CN206055661U CN206055661U CN201621030862.XU CN201621030862U CN206055661U CN 206055661 U CN206055661 U CN 206055661U CN 201621030862 U CN201621030862 U CN 201621030862U CN 206055661 U CN206055661 U CN 206055661U
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- vaporizer
- air
- agitator tank
- compressed
- ash bucket
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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 utility model discloses a kind of controlling device of coal-fired power station boiler air preheater obstruction, the device is connected with boiler back end ductwork, including agitator tank, water pump, filter, air pressure pump, aerator, heater, vaporizer and ash bucket；The air pressure pump is communicated in the top of vaporizer side wall by compressed-air atomizer, agitator tank is connected with compressed-air atomizer by pipeline, water pump and filter are provided with the middle of agitator tank and compressed-air atomizer, agitator is additionally provided with three pipelines for adding flying dust, fresh water (FW) and alkaline matter；The heated device of the aerator is connected with the top of vaporizer, is connected with boiler back end ductwork by connecting pipe below vaporizer side wall, and base of evaporator is provided with ash bucket.The controlling device that this utility model is provided can reduce the higher granule of the granule reunited in spraying into alkaline flying dust and silicon content to greatest extent, reduce pipe wear, can effectively reduce SO in flue again3Concentration, change flue gas in particulate matter viscosity, effective control air preheater obstructing problem.
Description
Technical field
This utility model is related to a kind of controlling device of coal-fired power station boiler air preheater obstruction.
Background technology
In coal-fired plant boiler burning running, a small amount of SO is had3Generate, in coal institute's sulfur-bearing number determine SO3
Content it is different, the SO of low sulfur-bearing coal3Can be little ppm magnitudes, and high-sulfur coal can make SO3Reach 30～40ppm even
It is higher.Increasingly strict with environmental protection standard, coal-fired power station boiler is equipped with SCR (SCR) denitrating flue gas, removes
The pollutant catabolic gene facilities such as dirt (electrostatic precipitator/sack cleaner), wet process of FGD (WFGD), to producing in coal combustion process
Raw NOx, flue dust, SO2Effective removing, but the catalyst of SCR denitration system have been carried out by the middle part of flue gas Deng Conventional pollution
Divide SO2Catalysis oxidation is SO3, make SO in flue gas3Concentration increase, flue gas acid dew point raise, cause air preheater burn into accumulate
Ash, blocking, jeopardize the safe operation of unit.
In air preheater, when flue-gas temperature is cooled to 177～215 DEG C, unreacted NH in SCR3With SO3Reaction life
Into ammonium hydrogen sulfate.Ammonium hydrogen sulfate is that a kind of viscosity is very strong and with the material compared with severe corrosive, and the viscosity of ammonium hydrogen sulfate is caused greatly
Amount flying dust is deposited on air preheater surfaces and causes air preheater to block, and increases the resistance of air preheater, increases air-introduced machine
Power consumption, even force unit blowing out cleaning air preheater, practical operating experiences to show that ammonium hydrogen sulfate is when serious
After SCR puts into operation, the principal element of air preheater corrosion and blocking causes air preheater resistance to increase, or even crisis unit
Safe operation.
The content of the invention
The purpose of this utility model is to provide a kind of controlling device of coal-fired power station boiler air preheater obstruction, is used for
Reduce SO in flue gas3Concentration, changes deposit viscosity, reduces the tendency of air preheater dust stratification and fouling；
Above-mentioned purpose of the present utility model is achieved by techniques below scheme：
A kind of controlling device of coal-fired power station boiler air preheater obstruction, the device are connected with boiler back end ductwork, are wrapped
Include agitator tank, water pump, filter, air pressure pump, aerator, heater, vaporizer and ash bucket；The air pressure pump leads to
Overcompression air nozzle is communicated in the top of vaporizer side wall, and agitator tank is connected with compressed-air atomizer by pipeline, agitator tank
Be provided with water pump and filter in the middle of compressed-air atomizer, agitator is additionally provided with three for adding flying dust, fresh water (FW) and alkalescence
The pipeline of material；The heated device of the aerator is connected with the top of vaporizer, passes through connecting pipe and pot below vaporizer side wall
Stove back-end ductwork is connected, and base of evaporator is provided with ash bucket.
Preferably, the ash bucket is replaced with centrifugal pellet catcher.
The beneficial effects of the utility model：
The controlling device that this utility model is provided can be by increasing flying dust and SO in boiler back end ductwork flue gas3Ratio
With the alkalescence of flying dust, SO in flue is reduced3Concentration, change deposit viscosity, and then reduce air preheater dust stratification and fouling
Tendency, can effectively reduce SO in flue3Concentration, the granule that can reunite in reducing alkaline flying dust to greatest extent again and
The higher granule of silicon content, reduces pipe wear.
Description of the drawings
The schematic device for administering coal-fired power station boiler air preheater obstruction that Fig. 1 is provided for this utility model；
Wherein, 1, agitator tank；2nd, water pump；3rd, filter；4th, air pressure pump；5th, aerator；6th, heater；7th, evaporate
Device；8th, ash bucket；9th, boiler back end ductwork；10th, flying dust addition pipeline；11st, fresh water (FW) addition pipeline；12nd, alkaline matter addition
Pipeline.
Specific embodiment
Essentiality content of the present utility model is further illustrated with reference to embodiment, but it is new this practicality not to be limited with this
Type protection domain.Although being explained in detail to this utility model with reference to preferred embodiment, one of ordinary skill in the art should
Work as understanding, the technical solution of the utility model can be modified or equivalent, without deviating from the essence of technical scheme
And scope.
Embodiment 1：
Device as shown in Figure 1, for administering coal-fired power station boiler air preheater obstruction, is connected with boiler back end ductwork 9
It is logical, including agitator tank 1, water pump 2, filter 3, air pressure pump 4, aerator 5, heater 6, vaporizer 7 and ash bucket 8；Institute
The top that air pressure pump 4 is communicated in 7 side wall of vaporizer by compressed-air atomizer is stated, agitator tank 1 is empty with compression by pipeline
Gas jets are connected, and are provided with water pump 2 and filter 3 in the middle of agitator tank 1 and compressed-air atomizer, and agitator 1 is additionally provided with three to be used for
The pipeline 10,11,12 of addition flying dust, fresh water (FW) and alkaline matter；Connect at the top of 5 heated device 6 of the aerator and vaporizer 7
It is logical, connected with boiler back end ductwork 9 by connecting pipe below 7 side wall of vaporizer, 7 bottom of vaporizer is provided with ash bucket 8.Its
In, ash bucket can also be replaced with centrifugal pellet catcher.In order to improve solute effect of the flying dust in fresh water (FW), can be with
Heating, attemperator are set in agitator tank.
The operation principle of the device：
Flying dust, fresh water (FW) and the alkaline matter that power station cleaner unit is collected enters agitator tank by pipeline respectively, mixes
Into alkaline slurry；Alkaline slurry Jing water pumps and filter flow to compressed-air atomizer, meanwhile, the compression that air pressure pump is produced is empty
The compressed air nozzle of gas squeezes into vaporizer, and alkaline slurry is blown and beaten into drop, is formed after drop air evaporation heated again
Alkaline flying dust, while by piping and druming to base of evaporator, the higher granule of the granule and silicon content reunited in alkaline flying dust because compared with
In ash bucket, the pipeline below other alkaline flying dust Jing vaporizer side walls sends into boiler back end ductwork to resedimentation, directly increases
Flying dust/SO3Ratio, and SO is further reduced by neutralization reaction3Concentration.
A kind of administering method of coal-fired power station boiler air preheater obstruction, is flown by increasing in boiler back end ductwork flue gas
Ash and SO3Ratio and flying dust alkalescence, reduce flue in SO3Concentration, and then reduce air preheater surfaces deposit；
Specifically include step as described below：
The fresh water (FW) that power station cleaner unit is collected is compared 3-10 according to weight with flying dust by step S1:Slurry is made in 1 mixing
Liquid, the temperature for preparing serosity are 30-50 DEG C；
Step S2, adds alkaline matter in serosity obtained by step S1, and it is 8-13 to control alkaline slurry pH, obtains alkaline slurry
Liquid；The alkaline matter is one or more in sodium carbonate, sodium bicarbonate, sodium sulfite, calcium oxide or magnesium oxide；
Step S3, alkaline slurry is sprayed in vaporizer by the way of compressed air atomization, is removed with hot-air or purification
Liquid evaporation in alkaline slurry is formed the alkaline flying dust after modulation by the flue gas after dirt；In vaporizer, temperature is 240-280
℃；
Alkaline flying dust obtained by step S3 is sent into boiler back end ductwork, is mixed with the flue gas in flue by step S4；Into pot
Before stove back-end ductwork, Jing ash buckets (or centrifugal pellet catcher) remove the fly ash granule and high silicon content wherein reunited
Fly ash granule, to reduce abrasion to pipeline.
Embodiment 2：
The flying dust that cleaner unit is collected is according to liquid-solid ratio 4:Serosity is made in 1 addition agitator tank stirring, and agitator tank arranges insulation
Measure and electric heater unit, slurry temperature is controlled between 40-50 DEG C；Sodium hydroxide adjustment serosity is added after serosity is stable
PH to 13；
Vaporizer is flowed from the top down using vertically arrangement, thermal current, is flowed out from the lateral exit of bottom, and bottom arranges product
Ash bucket；
Air Jing blowers enter heater, and after heating, Jing vaporizers spray into boiler back end ductwork and form stable gas
Stream, in control vaporizer, gas temperature is between 240-250 DEG C；
Alkaline slurry water pump is delivered to into compressed air atomizer after filter, compressed air pressure is
0.04Mpa, the bulky grain after evaporation and weight granule are deposited on the ash bucket of base of evaporator, and fine particle sprays into boiler with air-flow
Back-end ductwork；
Using the SO of boiler tail3Monitoring device implements feedback control, flue entrance SO to straying quatity3Concentration 57.4mg/
Nm3When, can be by SO3Removal efficiency is controlled more than 94.6%；Now flying dust emitted dose and the ratio of flue gas hour flow are 1195mg/
Nm3。
Embodiment 3：
The flying dust that cleaner unit is collected is according to liquid-solid ratio 10:Serosity is made in 1 addition agitator tank stirring, and agitator tank arranges insulation
Measure and electric heater unit, slurry temperature is controlled between 30-40 DEG C；Sodium carbonate adjustment serosity pH is added after serosity is stable
It is worth to 8；
Vaporizer is flowed from the top down using vertically arrangement, thermal current, is flowed out from the lateral exit of bottom, and bottom arranges product
Ash bucket；
Heater is caused with blower fan after neat stress condensation eliminating water after desulfurization, Jing vaporizers spray into boiler back end ductwork after heating
Steady air flow is formed, gas temperature is between 260-280 DEG C in control vaporizer；
Alkaline slurry water pump is delivered to into compressed air atomizer after filter, compressed air pressure is
0.04Mpa, the bulky grain after evaporation and weight granule are deposited on the ash bucket of base of evaporator, and fine particle sprays into boiler with air-flow
Back-end ductwork；
Using the SO of boiler tail3Monitoring device implements feedback control, flue entrance SO to straying quatity3Concentration 56.1mg/
Nm3When, can be by SO3Removal efficiency is controlled more than 95.2%；Now flying dust emitted dose and the ratio of flue gas hour flow are 1281mg/
Nm3。
Embodiment 4：
The flying dust that cleaner unit is collected is according to liquid-solid ratio 3:Serosity is made in 1 addition agitator tank stirring, and agitator tank arranges insulation
Measure and electric heater unit, slurry temperature is controlled between 30-40 DEG C；Calcium oxide adjustment serosity pH is added after serosity is stable
It is worth to 11；
Vaporizer is flowed from the top down using vertically arrangement, thermal current, is flowed out from the lateral exit of bottom, and bottom arranges product
Ash bucket；
Air Jing blowers enter heater, and after heating, Jing vaporizers spray into boiler back end ductwork and form stable gas
Stream, in control vaporizer, gas temperature is between 250-260 DEG C；
Alkaline slurry water pump is delivered to into compressed air atomizer after filter, compressed air pressure is
0.04Mpa, the bulky grain after evaporation and weight granule are deposited on the ash bucket of base of evaporator, and fine particle sprays into boiler with air-flow
Back-end ductwork；
Using the SO of boiler tail3Monitoring device implements feedback control, flue entrance SO to straying quatity3Concentration 58.2mg/
Nm3When, can be by SO3Removal efficiency is controlled more than 90.3%；Now flying dust emitted dose and the ratio of flue gas hour flow are 1073mg/
Nm3。
Above-described embodiment shows that the administering method that this utility model is provided is by increasing flying dust in boiler back end ductwork flue gas
With SO3Ratio and flying dust alkalescence, reduce flue in SO3Concentration, change deposit viscosity, and then reduce air preheat
Device dust stratification and the tendency of fouling, efficiently solve the problems, such as that air preheater blocks.Meanwhile, the improvement dress that this utility model is provided
Put can reduce to greatest extent spray into alkaline flying dust in the higher granule of the granule reunited and silicon content, reduce pipe wear,
SO in flue can be effectively reduced again3Concentration.
The effect of above-described embodiment indicates that essentiality content of the present utility model, but it is new not limit this practicality with this
The protection domain of type.It will be understood by those within the art that, the technical solution of the utility model can be modified
Or equivalent, without deviating from the essence and protection domain of technical solutions of the utility model.
Claims (2)
1. the controlling device that a kind of coal-fired power station boiler air preheater blocks, the device are connected with boiler back end ductwork, and which is special
Levy and be：Including agitator tank, water pump, filter, air pressure pump, aerator, heater, vaporizer and ash bucket；The sky
Gas compressor pump is communicated in the top of vaporizer by compressed-air atomizer, and agitator tank is connected with compressed-air atomizer by pipeline,
Water pump and filter are provided with the middle of agitator tank and compressed-air atomizer, agitator is additionally provided with three for adding flying dust, fresh water (FW)
With the pipeline of alkaline matter；The heated device of the aerator is connected with the top of vaporizer, passes through connecting tube below vaporizer side wall
Road is connected with boiler back end ductwork, and base of evaporator is provided with ash bucket.
2. device according to claim 1, it is characterised in that：The ash bucket is replaced with centrifugal pellet catcher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621030862.XU CN206055661U (en) | 2016-08-31 | 2016-08-31 | A kind of controlling device of coal-fired power station boiler air preheater obstruction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621030862.XU CN206055661U (en) | 2016-08-31 | 2016-08-31 | A kind of controlling device of coal-fired power station boiler air preheater obstruction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206055661U true CN206055661U (en) | 2017-03-29 |
Family
ID=58374849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621030862.XU Active CN206055661U (en) | 2016-08-31 | 2016-08-31 | A kind of controlling device of coal-fired power station boiler air preheater obstruction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206055661U (en) |
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2016
- 2016-08-31 CN CN201621030862.XU patent/CN206055661U/en active Active
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