CN109631075A - A kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running - Google Patents
A kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running Download PDFInfo
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- CN109631075A CN109631075A CN201811487579.3A CN201811487579A CN109631075A CN 109631075 A CN109631075 A CN 109631075A CN 201811487579 A CN201811487579 A CN 201811487579A CN 109631075 A CN109631075 A CN 109631075A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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
Abstract
The present invention provides a kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running, the anti-blocking grey air quantity adjusting method of air preheater, and the amounts of the acidic materials carried out by anti-blocking grey wind adjusts anti-blocking grey air quantity.Device for monitoring running, including hot wind probe tube, sampling control valve, solution absorb container and pH measures meter；The measurement end of hot wind probe tube is passed through solution and absorbs in container；Sampling control valve is located on hot wind probe tube；PH measures the pH value that meter measurement solution absorbs liquid in containers.The anti-blocking grey air quantity adjusting method of the present invention, the adjusting for the anti-blocking grey air quantity of air preheater provide direct foundation, determine most suitable air quantity, improve the economy of the anti-blocking ash system operation of air preheater, guarantee anti-blocking grey effect；Device for monitoring running, structure is simple, easy to control, and by the situation of change of pH, the adjusting for anti-blocking grey air quantity provides real-time foundation；Mounting structure, simple to operation, easy transformation is practical, easily promotes.
Description
Technical field
The present invention relates to a kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running, belong to station boiler
Air preheater running optimizatin technical field.
Background technique
Rotary regenerative air preheater (referred to as " air preheater ") is a kind of heat-exchange apparatus for large-sized station boiler,
Air needed for it heats burning using the heat of boiler smoke, the efficiency of boiler is improved with this.After air preheater,
Flue-gas temperature is generally cooled to 100~150 DEG C by 300~400 DEG C, and respective air temperature is generally heated to 280 by 0~50 DEG C~
380℃。
Air preheater realizes the continuous heat absorption and fume side of air side using the rotor continuous rotation for loading heat accumulating element
Continuous heat release, according to the needs of boiler oil system, air side point storehouse can be further divided into a wind separating bin and Secondary Air
Divide storehouse, correspondingly, fume side drives flow of flue gas by air-introduced machine, air side is flowed by primary air fan and pressure fan driving air.
Air preheater focus of attention problem mainly includes stifled ash, air leak rate of air curtain is higher, heat transfer efficiency is low, low-temperature corrosion is serious, smoke evacuation
Temperature is excessively high, and these problems affect the safe and economical operation of air preheater and entire boiler system for a long time.
The above problem is long-standing, and mutually promotes, influences each other.In recent years, generally putting into operation with denitrating system,
Air preheater running environment changes, and above-mentioned stifled grey problem becomes especially prominent, administers difficult, complicated.
The denitrating flue gas facility that coal-burning power plant adds at present is mainly based on selective catalytic reduction (SCR) technology.Using
Part SO after SCR denitration process, in flue gas2SO will be oxidized to by denitrating catalyst3, increase SO in flue gas3Volume it is dense
, there is inevitable the escaping of ammonia phenomenon in addition, lead to ammonium hydrogen sulfate (NH in degree4HSO4) etc. by-products a large amount of generations, and improve
Flue gas acid dew point temperature, causes low-temperature corrosion to aggravate.
Above-mentioned by-product ammonium hydrogen sulfate (NH4HSO4) it in temperature is within the scope of 146~207 DEG C, it is in molten, it can securely
It is adhered to air preheater heat accumulating element surface, makes heat accumulating element that corrosion and dust stratification occur, it is final easily to cause stifled ash, to unit
Safe operation causes very big hidden danger.Existing part power plant, the country leads to unit load limit because can not solve the problems, such as or alleviating this,
Even by forced-stopping machine.
When exhaust gas temperature is lower than acid dew point, sulfuric acid vapor will condense, and sulfuric acid droplets are attached on cold end heat accumulating element, rotten
Lose heat accumulating element.The acid dew point of flue gas is with SO3The raising of concentration and improve, typically up to 130~160 DEG C.Due to denitrating system
Increase SO2To SO3Conversion ratio, that is, improve SO in flue gas3Concentration, and many power plant are control cost of electricity-generating, practical coal
The sulfur of kind is generally higher than design coal, and therefore, the acid dew point of many power plant is higher than exhaust gas temperature at present, leads to low-temperature corrosion
It is quite prominent to block up ash problem for (acid dew piont corrosion) aggravation.
For solve Ash Blocking in Air Preheater problem, applicant disclose a series of patented solutions (such as application No. is
201510369487.5、201710698879.5、201721019416.3、201721321397.X、201711234268.1、
201721510369.2 equal patents or patent application), the technical idea of use is that hot wind is sent to air preheater cold-end air,
Localized hyperthermia, high-flow area are established inside heat accumulating element, by the double action of " high temperature pyrolysis " and " high speed is removed ", are prevented
The only stifled ash of heat accumulating element.Theoretically, increase hot wind air quantity, anti-blocking ash effect turns for the better, but operation energy consumption is bigger than normal simultaneously.
The above-mentioned hot wind anti-blocking for air preheater, it is defined as anti-blocking grey wind；Above-mentioned established localized hyperthermia,
High-flow area is defined as anti-blocking ash content storehouse.In engineer application, anti-blocking ash wind enters anti-blocking ash content storehouse from air preheater cold-end air
Import carries the above-mentioned sour gas (sulfuric acid and ammonium hydrogen sulfate) being adhered on heat accumulating element and is exported by anti-blocking ash content storehouse and flowed out,
The adjusting shortage direct basis of existing anti-blocking grey air quantity, the parameters such as ash fouling coefficient, the air preheater resistance of heat accumulating element, although
It can monitor on-line, but sensitivity and accuracy are not enough to the real-time adjusting for anti-blocking grey air quantity, and not adapt to boiler and auxiliary
The variation of machine system conditions.
It to sum up, is the operational effect for improving the anti-blocking ash system of air preheater hot wind, needing to research and develop one kind can be real online
When monitor operational effect new technology.
Summary of the invention
In order to improve the operational effect of the anti-blocking ash system of air preheater hot wind, it is anti-that the present invention provides a kind of air preheater
Stifled ash air quantity adjusting method and device for monitoring running.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of anti-blocking grey air quantity adjusting method of air preheater passes through the variable quantity for the acidic materials that anti-blocking grey wind carries out
To adjust anti-blocking grey air quantity.
The direct basis that the variable quantity of the above-mentioned acidic materials carried out using anti-blocking grey wind is adjusted as anti-blocking grey air quantity, it is real
The real-time and accurate adjusting of anti-blocking grey air quantity is showed, it is ensured that blocking-proof result.
In order to better assure blocking-proof result, while energy consumption is not wasted, cannot be carried out more when increasing anti-blocking grey air quantity
Acidic materials when, corresponding air quantity is the anti-blocking grey air quantity of target.Namely when anti-blocking grey air quantity is a, continue to increase air quantity
When, more acidic materials cannot be carried out, then air quantity a is the anti-blocking grey air quantity of target.
In order to the simple and quick amount for obtaining acidic materials, it is preferable that assess anti-blocking grey wind by solution absorption method and carry
The variable quantity of acidic materials out.
For the accuracy for reducing cost while ensuring to detect, it is preferable that the acidic materials that the anti-blocking grey wind of assessment carries out
The method of variable quantity are as follows: it is passed through taken hot wind is exported from anti-blocking ash content storehouse in liquid, by monitoring the variation of liquid pH value,
To characterize the variable quantity for the acidic materials that anti-blocking grey wind carries out.Certainly can also with acid value monitor, ion monitoring or with other objects
The methods of qualitative response characterizes the variable quantities of the acidic materials that anti-blocking grey wind carries out.
Aforesaid liquid is preferably water, and the application does not have specific requirement to the type of water, such as tap water can meet use
It is required that.
For anti-blocking ash air quantity during being gradually increased from zero, the amount for the acidic materials that anti-blocking ash wind carries out is by zero
It is gradually increased, the air quantity when beginning with acidic materials and being carried out is the minimum operation air quantity of anti-blocking grey wind, when anti-blocking grey wind
When measuring not less than minimum operation air quantity, anti-blocking in order to balance and energy-saving effect, when the anti-blocking grey wind of increase or reduction 1%~10%
The variation of amount, surveyed pH value is no more than 1%~3%, then current anti-blocking grey air quantity is the anti-blocking grey air quantity of target.
For anti-blocking ash air quantity during being gradually increased from zero, the amount for the acidic materials that anti-blocking ash wind carries out is by zero
It is gradually increased, the air quantity when beginning with acidic materials and being carried out is the minimum operation air quantity of anti-blocking grey wind, continues growing wind
When amount, the incrementss for the acidic materials being carried out can finally tend to be steady from quickling increase to be transitioned into be slowly increased, and be not less than
Under conditions of minimum operation air quantity, when anti-blocking grey air quantity is a, increase or reduce 1%~10% anti-blocking grey air quantity, surveyed pH value
Variation be no more than 1%~3%, then air quantity a is the anti-blocking grey air quantity of target.
As another scheme of the application, the method for assessing the variable quantity for the acidic materials that anti-blocking grey wind carries out are as follows:
It is passed through taken hot wind is exported from anti-blocking ash content storehouse in liquid, after pH value drops to less than 5, passes through control fluid flow dimension
It is constant to hold pH value, is changed by fluid flow, to characterize the variable quantity for the acidic materials that anti-blocking grey wind carries out.
As the anti-blocking grey device for monitoring running of a kind of air preheater for realizing the above method, including hot wind probe tube, take
Sample control valve, solution absorb container and pH measures meter；One end of hot wind probe tube is defined as sampling end, the other end is defined as
Measurement end, the measurement end of hot wind probe tube are passed through solution and absorb in container；Sampling control valve is located on hot wind probe tube；Solution is inhaled
Liquid is installed in receptacle, pH measures the pH value that meter measurement solution absorbs liquid in containers.
In use, the sampling end by hot wind probe tube is sampled in the outlet in anti-blocking ash content storehouse, samples taken passes through hot wind
It after probe tube, is absorbed in container into solution, the amount for the acidic materials that meter shows that anti-blocking grey wind carries out is measured by pH
Variation.It is preferred that the measurement end of hot wind probe tube is passed through in the liquid that solution absorbs in container.
In order to improve the comprehensive of sampling, it is preferable that the sampling end of hot wind probe tube is to being connected to multidraw section.Multidraw
Section is tubular structure, and the side wall of multidraw section is equipped with more than two sampling holes.
It is preferred that pH measurement meter is inserted directly into pH value determination in the liquid in solution absorption container.
It is preferred that solution, which absorbs container, is provided with water.
In order to realize that solution absorbs the continuous water inlet in container, it is ensured that the accuracy of detection, solution absorb container and is equipped with
Water inlet and overflow port, water inlet is in the lower section of overflow port.Because anti-blocking ash content storehouse, which exports, contains solid powder in taken hot wind
Trifle in the world matter will lead to solution and absorb liquid in containers muddiness even if the water that solution absorbs in container cannot recycle in time
Mud is generated, and then influences measurement accuracy.Therefore, preferably, it is provided with water inlet and overflow port, realizes that solution is inhaled
It constantly intakes in receptacle.The water outlet of overflow port is connected to other containers with using it for anything else or make purified treatment by pipeline.In order to
Guarantee the accuracy of test, flow of inlet water will be kept constant.
It is preferred that water inlet is located at the bottom that solution absorbs container.To play the role of bottom flow-disturbing while water inlet in this way,
Prevent bottom deposit from becoming silted up grey.
The nouns of locality such as the application top, lower section, top, bottom, refer both to the relative position of device normal use.
As it is another preferably, solution absorb container on is additionally provided with exhaust outlet, exhaust outlet is in the top of overflow port.
Applicant it has been investigated that, by adopting the above technical scheme, above-mentioned solution absorb container in, constantly fill into water, together
When be passed through from anti-blocking ash content storehouse and export the hot wind that takes, the acidic materials in hot wind are only absorbed by the water, and solution absorbs the gas in container
And solution is discharged through overflow port and/or exhaust outlet, measures the pH value that solution absorbs water after absorption acidic materials in container, according to
The variation of pH value calculates the variation of anti-blocking ash content storehouse outlet hot wind acidic substance content.Meanwhile according to surveyed pH value, moreover it is possible to comment
Estimate risk of the present air preheater by acid corrosion and stifled ash invasion.The water outlet of overflow port and/or exhaust outlet is connect by pipeline
To other containers with using it for anything else or make purified treatment；Overflow port and/or the gas of exhaust outlet discharge can be connected to it by pipeline
Its occasion is used as that it he uses or make to be vented after purified treatment etc..
Solution, which absorbs, in order to prevent mixes uneven, the anti-blocking grey device for monitoring running of air preheater of the present invention in container,
It further include pH test container, pH is measured in meter insertion pH test container, and pH test container is equipped with dirt inlet and sewage draining exit, into
Dirty mouth is located at the lower section of sewage draining exit；The dirt inlet that solution absorbs on overflow port and pH test container on container is connected by pipeline
It is logical.The solution being discharged from above-mentioned overflow port is introduced into dirt inlet, then is discharged from sewage draining exit, guarantees the continuous-stable of monitoring device
It uses.
It is preferred that dirt inlet is located at the bottom of pH test container, to play the role of bottom flow-disturbing while water inlet in this way, prevent
Only bottom deposit becomes silted up grey.Sewage outfalls setting is on the top of pH test container；Aforementioned top refers to the portion more than among pH test container
Point.
Above-mentioned hot wind probe tube dust stratification in order to prevent, the anti-blocking grey device for monitoring running of air preheater of the present invention further include
Air anti-blowpipe and the blowback control valve being located on air anti-blowpipe, one end of air anti-blowpipe are connected to hot wind probe tube, are another
One end connects blowback gas source.Above-mentioned blowback gas source is compressed air or cold First air or cold Secondary Air.Above-mentioned blowback control valve is beaten
It opens, realizes the blowing function of hot wind probe tube.
In order to improve the accuracy of monitoring, the anti-blocking grey device for monitoring running of air preheater of the present invention, further includes liquid flow
The water inlet on solution absorption container is arranged in meter and gas flowmeter, fluid flowmeter, and gas flowmeter is located at hot wind and takes
On sample pipe.Fluid flowmeter is used to measure the fluid flow entered in solution absorption container, and gas flowmeter is for measuring from anti-
Stifled ash content storehouse exports the hot air flow taken.It is preferred that it is constant into the fluid flow in solution absorption container, go out from anti-blocking ash content storehouse
The hot air flow that mouth takes is constant, can improve the accuracy of judgement in this way.
The mounting structure of the anti-blocking grey device for monitoring running of above-mentioned air preheater, including anti-blocking ash content storehouse are more when being not provided with
When point sampling section, the sampling end of hot wind probe tube is arranged in the outlet in anti-blocking ash content storehouse；When being equipped with multidraw section, multiple spot is taken
Sample section is arranged in the outlet in anti-blocking ash content storehouse.
Other parts mount positions of the application grey device for monitoring running anti-blocking to air preheater are not construed as limiting, as long as energy
It introduces solution by the hot wind that hot wind probe tube exports anti-blocking ash content storehouse to absorb in container, and convenient reading pH measured value, energy
The variation of real-time monitoring pH value.
In order to guarantee the representativeness of samples taken, while the normal operation of air preheater is not influenced, take when equipped with multiple spot
When sample section, multidraw section is fixed on the side of adjacent fanning strip, and does not touch mill with air preheater rotor.
As common sense, fanning strip is the existing conventional components of air preheater.
The application does not do the structure feature in anti-blocking ash content storehouse and excessively repeats, the disclosed air preheater before applicant
It is repeatedly illustrated in the relevant patent document of anti-blocking ash.
In practice, control valve can be set in the inlet and outlet of each component of above-mentioned apparatus or pipeline etc. as needed.
The unmentioned technology of the present invention is referring to the prior art.
A kind of anti-blocking grey air quantity adjusting method of air preheater of the present invention, the adjusting for the anti-blocking grey air quantity of air preheater mention
For direct foundation, most suitable air quantity is determined, improve the economy of the anti-blocking ash system operation of air preheater, guarantee anti-blocking ash
Effect；The anti-blocking grey device for monitoring running of air preheater, structure is simple, easy to control, is anti-blocking ash by the situation of change of pH value
The adjusting of air quantity provides real-time foundation；The mounting structure of the anti-blocking grey device for monitoring running of air preheater, it is simple to operation, easily change
It makes, it is practical, easily promote.
Detailed description of the invention
Fig. 1 is the anti-blocking grey device for monitoring running schematic diagram of 3 air preheater of the embodiment of the present invention.
Fig. 2 is 4 process flow diagram of the embodiment of the present invention.
Fig. 3 is 5 process flow diagram of the embodiment of the present invention.
Fig. 4 is 6 process flow diagram of the embodiment of the present invention.
Fig. 5 is multidraw section position schematic diagram of the present invention.
In figure: 1 is hot wind probe tube, and 2 be sampling control valve, and 3 absorb container for solution, and 4 measure meter for pH, and 5 be more
Point sampling section, 6 be water source, and 7 be water inlet, and 8 be overflow port, and 9 be exhaust outlet, and 10 be pH test container, and 11 be dirt inlet, and 12 are
Sewage draining exit, 13 be anti-blowpipe, and 14 be blowback control valve, and 15 be blowback gas source, and 16 be fluid flowmeter, and 17 be gas flowmeter；
20 be anti-blocking ash content storehouse, and 21 be fanning strip.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
Embodiment 1
The anti-blocking grey air quantity adjusting method of a kind of air preheater, by the amount for assessing the acidic materials that anti-blocking grey wind carries out
To adjust anti-blocking grey air quantity.Namely the amount of the acidic materials carried out using anti-blocking grey wind as anti-blocking grey air quantity adjusting it is direct
Foundation realizes the real-time adjusting of anti-blocking grey air quantity.As one of concrete implementation mode, can be carried by assessing anti-blocking grey wind
The variable quantity of acidic materials out adjusts anti-blocking grey air quantity, when increasing anti-blocking grey air quantity cannot carry out more acidic materials
When, corresponding air quantity is the anti-blocking grey air quantity of target.
The method for assessing the variable quantity for the acidic materials that anti-blocking grey wind carries out are as follows: by what is taken from the outlet of anti-blocking ash content storehouse
Hot wind is passed through in water, by monitoring the variation of liquid pH value, to characterize the variable quantity for the acidic materials that anti-blocking grey wind carries out.
As the anti-blocking grey device for monitoring running of a kind of air preheater for realizing the above method, including hot wind probe tube, take
Sample control valve, solution absorb container and pH measures meter；Solution, which absorbs in container, is installed with tap water；By the one of hot wind probe tube
End is defined as sampling end, the other end is defined as measurement end, and the measurement end of hot wind probe tube is passed through the hot wind in solution absorption container
The measurement end of probe tube is passed through solution and absorbs in container in tap water；Sampling control valve is located on hot wind probe tube；PH measures table
Meter measurement solution absorbs the pH value of liquid in containers.
The anti-blocking grey device for monitoring running of above-mentioned air preheater, is mounted on the air preheater equipped with anti-blocking ash content storehouse,
As long as guaranteeing that the sampling end of hot wind probe tube is arranged in the outlet in anti-blocking ash content storehouse, other components can come according to field condition
Arrangement, as long as the hot wind that can be exported anti-blocking ash content storehouse by hot wind probe tube introduces solution and absorbs in container, and convenient reading
PH measured value, the variation of energy real-time monitoring pH, the acidic materials that the anti-blocking grey wind of variation energy real-time characterization of pH value carries out
Variable quantity.
Embodiment 2
It is substantially the same manner as Example 1, except that: the anti-blocking grey air quantity adjusting method of air preheater, anti-blocking ash air quantity
During being gradually increased from zero, the amount of acidic materials that anti-blocking ash wind carries out is gradually increased by zero, when beginning with
Air quantity when acidic materials are carried out is the minimum operation air quantity of anti-blocking grey wind, when anti-blocking grey air quantity is not less than minimum operation wind
When amount, anti-blocking in order to balance and energy-saving effect, when the anti-blocking grey air quantity of increase or reduction 1%~10%, the variation of surveyed pH value
No more than 1%~3%, then current anti-blocking grey air quantity is the anti-blocking grey air quantity of target.
The sampling end of hot wind probe tube is to being connected to multidraw section.Multidraw section is tubular structure, multidraw section
It is disposed with 5 (being also possible to 3,8 or 11 etc. in practice) sampling holes on side wall, can preferably guarantee sampling in this way
It is representative.When installation, as shown in figure 5, multidraw section to be arranged in the outlet in anti-blocking ash content storehouse, and it is fixed on adjacent fanning strip
Side, and do not touch mill with air preheater rotor.
Embodiment 3
As shown in Figure 1, it is substantially the same manner as Example 2, except that: pH measurement meter is inserted directly into solution and absorbs container
In liquid in pH value determination.In order to realize that solution absorbs the continuous water inlet in container, it is ensured that the accuracy of detection, solution absorb
Container is equipped with water inlet and overflow port, and water inlet is in the lower section of overflow port, and water inlet is located at the bottom that solution absorbs container.
Because anti-blocking ash content storehouse, which exports, contains solid dust impurity in taken hot wind, if the water that solution absorbs in container cannot be timely
It recycles, will lead to solution and absorb the muddy even generation mud of liquid in containers, and then influence measurement accuracy.Therefore, it is arranged
Water inlet and overflow port realize that solution absorbs and constantly intake in container that water inlet is located at the bottom that solution absorbs container, into
To play the role of bottom flow-disturbing while water, prevent bottom deposit from becoming silted up grey.The water outlet of overflow port is connected to other appearances by pipeline
Device is with using it for anything else or make purified treatment.In order to guarantee the accuracy of measurement, flow of inlet water will keep keeping constant.Simultaneously in order to true
It ensures safety, solution, which absorbs, is additionally provided with exhaust outlet on container, and exhaust outlet is in the top of overflow port.
Applicant it has been investigated that, by adopting the above technical scheme, above-mentioned solution absorb container in, constantly fill into originally
Water, while being passed through from anti-blocking ash content storehouse and exporting the hot wind taken, the acidic materials in hot wind are only absorbed by the water, and solution absorbs in container
Gas and solution are discharged through overflow port and/or exhaust outlet, measure the pH value that solution absorbs water after absorption acidic materials in container,
The variation of anti-blocking ash content storehouse outlet hot wind acidic substance content is calculated according to the variation of pH value.Meanwhile according to surveyed pH value, also
Risk of the present air preheater by acid corrosion and stifled ash invasion can be assessed.
Embodiment 4
As shown in Fig. 2, it is substantially the same manner as Example 3, except that: above-mentioned hot wind probe tube dust stratification in order to prevent, it is empty
The blowback control valve that the anti-blocking grey device for monitoring running of air preheater further includes air anti-blowpipe and is located on air anti-blowpipe, it is empty
One end of gas anti-blowpipe is connected to hot wind probe tube, the other end connect blowback gas source.Above-mentioned blowback gas source is compressed air or cold
First air or cold Secondary Air.Above-mentioned blowback control valve is opened, and realizes the blowing function of hot wind probe tube.
Embodiment 5
As shown in figure 3, it is substantially the same manner as Example 4, except that: solution, which absorbs, in order to prevent mixes unevenness in container
Even, the anti-blocking grey device for monitoring running of air preheater further includes pH test container, and pH is measured in meter insertion pH test container,
PH test container is equipped with dirt inlet and sewage draining exit, and dirt inlet is located at the bottom of pH test container, and sewage outfalls setting is tested in pH
The top of container；The dirt inlet that solution absorbs on overflow port and pH test container on container passes through pipeline connection.It overflows from above-mentioned
The solution of head piece discharge is introduced into dirt inlet, then is discharged from sewage draining exit, guarantees that the continuous-stable of monitoring device uses.
Embodiment 6
As shown in figure 4, it is substantially the same manner as Example 5, except that: the accuracy in order to improve monitoring, air preheat
The anti-blocking grey device for monitoring running of device further includes fluid flowmeter and gas flowmeter, and fluid flowmeter setting is absorbed in solution to be held
Water inlet on device, gas flowmeter are located on hot wind probe tube.Fluid flowmeter enters in solution absorption container for measuring
Fluid flow, gas flowmeter is used to measure from the hot air flow that takes of anti-blocking ash content storehouse outlet.It is absorbed in container into solution
Fluid flow it is constant, from the outlet of anti-blocking ash content storehouse, the hot air flow that takes is constant, can improve the accuracy judged in this way.
Embodiment 7
It is substantially the same manner as Example 6, except that: the side of the variable quantity for the acidic materials that the anti-blocking grey wind of assessment carries out
Method are as follows: be passed through taken hot wind is exported from anti-blocking ash content storehouse in liquid, after pH value drops to 4.5, inhaled by control solution
It is 4.5 constant that the flow of receptacle water inlet saliva, which maintains pH value, is changed by water flow, to characterize the acid that anti-blocking grey wind carries out
The variable quantity of property substance, applicant it has been investigated that, it is in a linear relationship between water flow and the amount of acidic materials.
Claims (14)
1. a kind of anti-blocking grey air quantity adjusting method of air preheater, it is characterised in that: the acid carried out by anti-blocking grey wind
The variable quantity of matter adjusts anti-blocking grey air quantity.
2. the anti-blocking grey air quantity adjusting method of air preheater as described in claim 1, it is characterised in that: when the anti-blocking grey wind of increase
When amount cannot carry out more acidic materials, corresponding air quantity is the anti-blocking grey air quantity of target.
3. the anti-blocking grey air quantity adjusting method of air preheater as claimed in claim 1 or 2, it is characterised in that: inhaled by solution
Receipts method assesses the variable quantities of the acidic materials that anti-blocking grey wind carries out.
4. the anti-blocking grey air quantity adjusting method of air preheater as claimed in claim 1 or 2, it is characterised in that: assess anti-blocking ash
The method of the variable quantity for the acidic materials that wind carries out are as follows: be passed through in liquid, lead to by taken hot wind is exported from anti-blocking ash content storehouse
The variation of monitoring liquid pH value is crossed, to characterize the variable quantity for the acidic materials that anti-blocking grey wind carries out.
5. the anti-blocking grey air quantity adjusting method of air preheater as claimed in claim 4, it is characterised in that: anti-blocking ash air quantity from
During zero is gradually increased, the amount of acidic materials that anti-blocking ash wind carries out is gradually increased by zero, when beginning with acidity
Air quantity when substance is carried out is the minimum operation air quantity of anti-blocking grey wind, when anti-blocking grey air quantity is not less than minimum operation air quantity
When, when the anti-blocking grey air quantity of increase or reduction 1%~10%, the variation of surveyed pH value is no more than 1%~3%, then current anti-blocking
Grey air quantity is the anti-blocking grey air quantity of target.
6. the anti-blocking grey air quantity adjusting method of air preheater as claimed in claim 1 or 2, it is characterised in that: assess anti-blocking ash
The method of the variable quantity for the acidic materials that wind carries out are as follows: it is passed through taken hot wind is exported from anti-blocking ash content storehouse in liquid, when
After pH value drops to less than 5, maintains pH value constant by control fluid flow, changed by fluid flow, to characterize anti-blocking ash
The variable quantity for the acidic materials that wind carries out.
7. a kind of anti-blocking grey device for monitoring running of air preheater, it is characterised in that: including hot wind probe tube, multidraw section,
Sample control valve, solution absorbs container and pH measures meter；One end of hot wind probe tube is defined as sampling end, other end definition
For measurement end, multidraw section is docked at the sampling end of hot wind probe tube, and the measurement end of hot wind probe tube, which is passed through solution and absorbs, to be held
In device；Sampling control valve is located on hot wind probe tube；Solution, which absorbs, is installed with liquid in container, pH measures meter measurement solution and inhales
The pH value of liquid in receptacle.
8. the anti-blocking grey device for monitoring running of air preheater as claimed in claim 6, it is characterised in that: solution absorbs in container
Equipped with water, solution absorbs container and is equipped with water inlet and overflow port, and water inlet is in the lower section of overflow port.
9. the anti-blocking grey device for monitoring running of air preheater as claimed in claim 8, it is characterised in that: water inlet is located at solution
Absorb the bottom of container.
10. the anti-blocking grey device for monitoring running of air preheater as claimed in claim 8, it is characterised in that: solution absorbs container
On be additionally provided with exhaust outlet, exhaust outlet is in the top of overflow port.
11. the anti-blocking grey device for monitoring running of air preheater as claimed in claim 8, it is characterised in that: further include pH test
Container, pH are measured in meter insertion pH test container, and pH test container is equipped with dirt inlet and sewage draining exit, and dirt inlet is located at blowdown
The lower section of mouth；The dirt inlet that solution absorbs on overflow port and pH test container on container passes through pipeline connection.
12. the anti-blocking grey device for monitoring running of air preheater as described in claim 7-11 any one, it is characterised in that: also
Including air anti-blowpipe and the blowback control valve being located on air anti-blowpipe, one end of air anti-blowpipe and hot wind probe tube connect
The logical, other end connects blowback gas source.
13. the anti-blocking grey device for monitoring running of air preheater as described in claim 7-11 any one, it is characterised in that: also
Including fluid flowmeter and gas flowmeter, the water inlet on solution absorption container, gas flowmeter is arranged in fluid flowmeter
It is located on hot wind probe tube.
14. the mounting structure of the anti-blocking grey device for monitoring running of air preheater described in claim 7-13 any one, including
Anti-blocking ash content storehouse, it is characterised in that: multidraw section is arranged in the outlet in anti-blocking ash content storehouse, and multidraw section be fixed on it is adjacent
Fanning strip side, do not touch mill with air preheater rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487579.3A CN109631075A (en) | 2019-01-31 | 2019-01-31 | A kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487579.3A CN109631075A (en) | 2019-01-31 | 2019-01-31 | A kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running |
Publications (1)
| Publication Number | Publication Date |
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| CN109631075A true CN109631075A (en) | 2019-04-16 |
Family
ID=66071718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811487579.3A Withdrawn CN109631075A (en) | 2019-01-31 | 2019-01-31 | A kind of anti-blocking grey air quantity adjusting method of air preheater and device for monitoring running |
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| CN (1) | CN109631075A (en) |
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| CN107158925A (en) * | 2017-07-05 | 2017-09-15 | 山西新唐工程设计股份有限公司 | A kind of SCR boilers air preheater anti-blocking method |
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| CN208365577U (en) * | 2018-07-03 | 2019-01-11 | 南京博沃科技发展有限公司 | It is a kind of to utilize the self-cleaning rotary regenerative air preheater of high flow rate hot wind |
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2019
- 2019-01-31 CN CN201811487579.3A patent/CN109631075A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2703548B2 (en) * | 1988-01-13 | 1998-01-26 | バブコツク日立株式会社 | Air preheater performance diagnostic device |
| CN201416901Y (en) * | 2009-03-19 | 2010-03-03 | 天津宝成机械集团有限公司 | Preheater with adjustable flue air temperatures |
| CN104949149A (en) * | 2015-06-29 | 2015-09-30 | 南京博沃科技发展有限公司 | Rotary air preheater dust-blocking-prevention synergy sealing method and system |
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