CN106706375A - Device and method for performing liquid drop sampling and measurement in wet flue gas - Google Patents
Device and method for performing liquid drop sampling and measurement in wet flue gas Download PDFInfo
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- CN106706375A CN106706375A CN201611063595.0A CN201611063595A CN106706375A CN 106706375 A CN106706375 A CN 106706375A CN 201611063595 A CN201611063595 A CN 201611063595A CN 106706375 A CN106706375 A CN 106706375A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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Abstract
The invention discloses a device and method for performing liquid drop sampling and measurement in wet flue gas. The device comprises a sampling pipe, a filter, a drier, a temperature and pressure sensor, a gas flowmeter, an air extracting pump and a thermal insulation material. When liquid drop in wet flue gas is sampled and measured, the measured wet flue gas enters the sampling pipe from the top end under the action of the air extracting pump, flows through the sampling pipe and enters the filter, the liquid drop in the flue gas remains in the filter and is collected to form a liquid drop sample, the flue gas not containing liquid drop enters the drier, and water vapor in the flue gas is removed in the drier; at the moment, the temperature and pressure sensor is used for measuring the temperature and pressure of dry flue gas not containing liquid drop and water vapor, the gas flowmeter measures the cumulative volume flow of the dry flue gas, and the content of liquid in the measured wet flue gas can be worked out according to the data. The device and the method can solve the problem in the prior art that liquid drop in wet flue gas cannot be accurately measured and sampled in engineering practice, and an accurate assessment on the corrosivity of the wet flue gas is made.
Description
Technical field
The invention belongs to flue gas inspection technical field, and in particular to drop sampling and measuring device and side in a kind of wet flue gas
Method.
Background technology
In the flue gas that combustion of fossil fuel is produced, contain a large amount of SOX、NOX、HCl、H2The gaseous contaminants such as S.Engineer applied
In these pollutants are removed using the method for wet scrubbing generally, i.e., rushed using a large amount of slurries adverse currents containing absorbent
Brush flue gas, the gaseous contaminant in flue gas reacts with absorbent and generates liquid or solid product, so as to be taken off from flue gas
Remove.It is wet flue gas, wherein water vapour content saturation by the flue gas of wet scrubbing, and carries a large amount of drops.These drops lead to
Often it is liquid-solid mixture, is mainly made up of absorbent slurry and absorbing reaction product.Gaseous state is dirty in wet flue gas after wet scrubbing
Dye thing content is very low, and SO in drop4 2-、SO3 2-、NO3 -、Cl-、F-The concentration of isoreactivity anion is but very high, therefore wet flue gas
The drop of middle carrying is only the main cause for causing wet flue gas to cause corrosion, and the content and chemical property of drop directly determine wet cigarette
The power of gas corrosion.Droplet content is higher in wet flue gas, drop chemical property is more active, and the corrosivity of wet flue gas is also more
By force.
By taking fire coal boiler fume as an example, China's overwhelming majority coal-burning boiler uses wet desulfurization of flue gas by limestone-gypsum method skill
Art is to the SO in flue gas2Removed, the process is carried out in desulfurizing tower.Contain a large amount of liquid in the wet flue gas of desulfurizing tower outlet
Drop, with very strong corrosivity, because the damage accident layer of desulfurizing tower rear pass, equipment and chimney caused by wet flue gas corrosion goes out
It is not poor.However, due to structure design and the difference of operation, the content of drop has very big difference in wet flue gas after different desulfurizing towers
Not, it is likely lower than 5g/m3, it is also possible to up to 200g/m3More than, the composition of drop is also different, causes the corrosivity of wet flue gas
With very big difference.Desulfurizing tower rear pass, equipment and chimney should take different degrees of anti-corrosion according to the corrosive power of wet flue gas
, should be maintained at corrosion phenomenon in controlled range by measure, also avoid unnecessary cost.
In recent years, it is not rarely seen due to underestimating the corrosion accident that the corrosivity of wet flue gas after wet scrubbing causes.And it is another
A little producers then directly use very high-grade anti-corrosion measure and material, although avoid corrosion accident, but bring it is high into
This, causes larger waste.The corrosive power of wet flue gas is correctly assessed, it is necessary to measure the liquid in wet flue gas
Drop content, and sampling analysis is carried out to drop.However, a kind of accurate and feasible device can not reach in engineer applied at present
To above-mentioned purpose.Therefore, drop sampling and measurement apparatus have in a kind of wet flue gas that may apply in engineering practice of design
Highly important meaning.
The content of the invention
It is an object of the invention to provide drop sampling and measuring device and method in a kind of wet flue gas, prior art pair is solved
Drop in engineering practice in wet flue gas cannot carry out the problem of accurate measurement and sampling, and on this basis, to wet flue gas
Corrosivity makes accurate evaluation.
In order to achieve the above object, present invention employs following detection means and technical scheme：
Drop sampling and measuring device in a kind of wet flue gas, including sampling pipe 1, filter 2, drier 3, the temperature being sequentially connected
Degree and pressure sensor 4, gas flowmeter 5 and aspiration pump 6, the sampling pipe 1 are located at part and the outsourcing of filter 2 outside flue
It is wrapped with insulation material 7；The filter 2 includes shell 2-1, is arranged on the filter core 2-5 in shell 2-1, is arranged on shell 2-1 left
The air inlet 2-2 and gas outlet 2-3 at right two ends, are arranged on the leakage fluid dram 2-4 and filter core 2-5 of shell 2-1 bottoms；The sampling pipe
1 tail end is connected with the air inlet 2-2 of the filter 2；The gas outlet 2-3 of the filter 2 is connected with the drier 3；
The sampling pipe 1 be used for vertical gas pass when be L-type bend pipe, during for horizontal flue be U-shaped bend pipe, at its top inlet pipeline section with
Wet flue gas direction of flow is parallel, and its top inlet is just to the direction of flow of wet flue gas.
The sampling pipe 1 is located at the length of pipe section of vertical flue gas flow direction in flue not less than 50cm or more than point position cigarette
The 1/4 of road width；The internal diameter of the sampling pipe 1 is not less than 5mm.
Filter core 2-5 is not less than 1 μm to the filtering accuracy of drop in wet flue gas in the filter 2；The filter 2 is gathered
Droplet sample gross weight not less than the initial weight of filter 2 1/10.
The measurement error of the temperature and pressure sensor 4 is not more than 5%.
The gas flowmeter 5 is vortex-shedding meter, thermal flowmeter or Roots type flowmeter；The gas flowmeter 5 is surveyed
The error for measuring dry flue gas cumulative volume flow is not more than 10%.
The suction power of the aspiration pump 6 can be adjusted, and make the flue gas flow rate in the sampling pipe 1 wet close to point position
The flow velocity of flue gas.
On the premise of air-tightness is ensured, the sampling pipe 1, filter 2, drier 3, temperature and pressure sensor 4, gas
Using threaded connection or flange connection, junction occurs without sharp less than 90 ° for junction between flowmeter body 5 and aspiration pump 6
Angle.
The reduction of heater element hygrometric flue-gas temperature to slow down is disposed with the insulation material 7.
A kind of drop sampled measurements method in wet flue gas, before measurement, first on institute hygrometric flue gas point position walling of flue 8
Gaging hole 9 is opened, and the temperature T of point position wet flue gas is measured using plug-in type temperature and pressure sensor 100And pressure p0, use
Balance measures the initial weight w of untapped filter 2 in advance0。
During sampled measurements, sampling and measuring device is placed horizontally at outside flue described in claim 1, and sampling pipe 1 passes through gaging hole 9
In insertion flue, pipeline section is parallel with flowing to for wet flue gas at the top inlet of sampling pipe 1, and top inlet is just to wet flue gas come the side of stream
To；In the presence of aspiration pump 6, wet flue gas enter sampling and measuring device from the top inlet of sampling pipe 1, by sampling pipe 1 from
The air inlet 2-2 of filter 2 enters filter 2, and the leakage fluid dram 2-4 of filter 2 is closed in measurement process；Drop in flue gas
It is filtered in the filter core 2-5 by filter 2, is rested in filter 2, the flue gas without drop goes out from filter 2
Gas port 2-3 enters drier 3；In drier 3, the vapor in flue gas is removed；Subsequent temperature and pressure sensor 4 is surveyed
Go out the temperature T of the dry flue gas now without drop and vapor1And pressure p1, gas flowmeter 5 measure the dry flue gas measurement
Cumulative volume flow V in time t1；Aspiration pump 6 provides work(required when flue gas is extracted out from flue；
By after the sampling of certain hour t, sampling pipe 1 being extracted out from flue, filter 2 is removed rapidly, use day
The flat weight w for measuring sampling after-filter 21；The leakage fluid dram 2-4 of filter 2 is opened after the completion of weighing, from the air inlet of filter 2
Mouth 2-2 and gas outlet 2-3 is collected to sampling bottle the liquid flowed out from leakage fluid dram 2-4 to cleaned air is blown into filter 2
In；The liquid of collection is the sample of drop in institute's hygrometric flue gas, and further it can be analyzed, and detects its chemical property；
The content ω of drop is calculated using following methods in institute's hygrometric flue gas：
1) the temperature T of point position wet flue gas is inquired about0The saturated vapour pressure p of lower vaporw：
2) the cumulative volume flow V of dry flue gas part in point position institute hygrometric flue gas is calculatedd：
Vd=V1×p1×T0/(T1×p0)
3) the cumulative volume flow V of water vapor portion in point position institute hygrometric flue gas is calculatedw：
Vw=Vd×pw/(p0-pw)
4) the total cumulative volume flow V of point position institute hygrometric flue gas is calculated0：
V0=Vd+Vw
5) the content ω of drop in point position wet flue gas is calculated：
ω=(w1-w0)/V0
The content of drop is drawn by more than three times survey calculation results averageds in point position wet flue gas, unitary sampling
The time of measurement is no less than 30 minutes；
The content of drop in the chemical property and measured wet flue gas of comprehensive collected droplet sample, can be to institute's hygrometric cigarette
Gas corrosion power makes assessment.
Compared to the prior art compared with, the invention has the advantages that：
Impurity sampling apparatus is nearly all the sampling apparatus of flue dust in dry flue gas in current flue gas existing on the market.It is only suitable
For the collection of solid particulate matter in the dry flue gas without liquid impurities without wet scrubbing.Other is declared can be used for
The device of " wet flue gas " measurement, be generally measure that water vapour content is unsaturated, vapor contains in the flue gas without liquid impurities
Amount, the essence of wet flue gas after wet scrubbing is not caught.
In flue gas after wet scrubbing, vapor its actually hypersaturated state.Water vapour content saturation in gas phase, while also
The liquid and solid impurity existed with drops in the presence of some.These impurity are only the master that flue gas after wet scrubbing causes corrosion
Want reason.The sampling apparatus of flue dust is not used to the flue gas after wet scrubbing in dry flue gas.In flue gas gas phase after wet scrubbing
The content saturation of vapor, can be calculated by steam-laden vapour pressure, without measurement.Corruption to wet flue gas after wet scrubbing
The crucial part that corrosion is estimated is exactly the property for understanding its droplet content and drop.The present invention two is pointed out exactly more than
Hair, is sampled and is measured to drop in wet flue gas after wet scrubbing.
With environmental problem severe, environmentally friendly system it is increasingly strict, wet scrubbing technology is widely used in all trades and professions
Smoke processing system in, and the corrosion that wet flue gas are caused after wet scrubbing has turned into a serious engineering problem.The present invention
Assessment corrosive for wet flue gas after wet scrubbing has important value, can both reduce the generation of corrosion accident, also avoids
Unnecessary waste, has broad application prospects.
Brief description of the drawings
Fig. 1 is the structural representation when present invention carries out drop sampling in wet flue gas and measures.
Fig. 2 be the present invention for horizontal flue when variants structural representation.
Fig. 3 is the structural representation of filter in Fig. 1 and Fig. 2.
Fig. 4 is the schematic diagram that plug-in type temperature and pressure sensor measures wet flue gas temperature and pressure.
Specific embodiment
Structure of the invention and operation principle are further described below in conjunction with the accompanying drawings.
Structural representation when Fig. 1 is for drop sampling in a kind of wet flue gas for providing of the invention and the work of measurement apparatus.
The present invention provide a kind of wet flue gas in drop sampling and measurement apparatus by sampling pipe 1, filter 2, drier 3,
Temperature and pressure sensor 4, gas flowmeter 5, aspiration pump 6 and insulation material 7 are constituted.
Fig. 1 is the case in vertical gas pass during wet flue gas of the invention, and now sampling pipe 1 is L-type bend pipe.Work as the present invention
For during wet flue gas, sampling pipe 1 to be U-shaped bend pipe in horizontal flue.Fig. 2 be the present invention for horizontal flue when variants structure
Schematic diagram.
As illustrated, filter 2 includes shell 2-1, air inlet 2-2, gas outlet 2-3, leakage fluid dram 2-4 and filter core 2-5.
The tail end of sampling pipe 1 is connected with the air inlet 2-2 of filter 2, the gas outlet 2-3 of filter 2 and entering for drier 3
Mouthful be connected, the outlet of drier 3 is connected with temperature and pressure sensor 4, gas flowmeter 5, the outlet of gas flowmeter 5 with take out
Air pump 6 is connected.
Gaging hole 9 is provided with wet flue gas point position walling of flue 8, the size of gaging hole 9 should ensure that probe tube 1 and insertion
Formula temperature and pressure sensor 10 is passed through.
Fig. 4 is the schematic diagram that plug-in type temperature and pressure sensor 10 measures wet flue gas temperature and pressure.
The temperature T of point position wet flue gas is measured by gaging hole 9 using plug-in type temperature and pressure sensor 100And pressure
p0。
The initial weight w of untapped filter 2 is measured using balance0。
When drop in wet flue gas is sampled and measured, the present apparatus is placed horizontally at outside flue.Sampling pipe 1 is located at cigarette
Part and filter 2 outside road are wrapped with insulation material 7.Sampling pipe 1 is inserted in flue by gaging hole 9.The top of sampling pipe 1
Porch pipeline section is parallel with flowing to for wet flue gas, and top inlet is just to wet flue gas direction of flow.It is wet in the presence of aspiration pump 6
Flue gas enters the present apparatus from the top inlet of sampling pipe 1, and filter 2 is entered from the air inlet 2-2 of filter 2 by sampling pipe 1.
The leakage fluid dram 2-4 of filter 2 is closed in measurement process.Drop in flue gas is filtered in the filter core 2-5 by filter 2
Fall, rest in filter 2, the flue gas without drop enters drier 3 from the gas outlet 2-3 of filter 2.In drier 3,
Vapor in flue gas is removed.Subsequent temperature and pressure sensor 4 can be measured now dry without drop and vapor
The temperature T of flue gas1And pressure p1, gas flowmeter 5 can measure the cumulative volume flow in time of measuring t of the dry flue gas
V1.Aspiration pump 6 provides work(required when flue gas is extracted out from flue.
By after the sampling of certain hour t, sampling pipe 1 being extracted out from flue, filter 2 is removed rapidly, use day
The flat weight w for measuring sampling after-filter 21.In summary measurement data, is calculated using the computational methods in the content of the invention and is surveyed
The content ω of drop in wet flue gas.
The leakage fluid dram 2-4 of filter 2 is opened after the completion of weighing, while from the air inlet 2-2 and gas outlet 2-3 of filter 2
To cleaned air is blown into filter 2, to help the discharge of liquid in filter 2.The liquid that will be flowed out from leakage fluid dram 2-4 is collected
Into sampling bottle.The liquid of this collection step is the sample of drop in institute's hygrometric flue gas.Further it can be analyzed, examined
Survey its chemical property.
The content of drop in the chemical property and measured wet flue gas of comprehensive collected droplet sample, can be to institute's hygrometric cigarette
Gas corrosion power makes assessment.Droplet content is higher in wet flue gas, drop chemical property is more active, the corrosivity of wet flue gas
Also it is stronger；Droplet content is lower, drop chemical property is more stable, and the corrosivity of wet flue gas is also weaker.
The material of the sampling pipe 1 is corrosion resistant hydrophobic duroplasts, is not deformed in sampling process.
The sampling pipe 1 is L-type bend pipe (being used for vertical gas pass) or U-shaped bend pipe (being used for horizontal flue), to ensure that it is pushed up
End entrance is just to the direction of flow of wet flue gas.
The sampling pipe 1 is located at the length of pipe section of vertical flue gas flow direction in flue not less than 50cm or more than point position cigarette
The 1/4 of road width, to reduce the influence in flue gas flow field boundary layer in flue.
The internal diameter of the sampling pipe 1 is not less than 5mm, in case drop solid constituent in porch film forming or drop causes to block up
Plug.
The material of shell 2-1 is the corrosion resistant hydrophobic plastics such as polytetrafluoroethylene (PTFE), polypropylene in the filter 2.
Lid or valve are provided with the filter 2 on leakage fluid dram 2-4, unlatching and the pass of leakage fluid dram 2-4 can be controlled
Close.
Filter core 2-5 is formed by the braiding of the materials such as glass fibre, plastic optical fibre or nylon in the filter 2, or by filter membrane
It is entwined, the filtering accuracy to drop in wet flue gas is not less than 1 μm.
The sampling process must terminate before a large amount of hydrops occurs in the bottom of the filter 2, to reduce the secondary of drop
Entrainment.
The gross weight of the droplet sample of the collection of the filter 2 is not less than the initial weight w of filter 201/10, with reduce
The error weighed.
The internal desiccant of the drier 3 is the neutral drier such as anhydrous calcium chloride, silica gel, beyond vapor in flue gas
Gas does not produce absorption.
The maximum absorption of the internal desiccant of the drier 3 is not less than 5 times of vapor total amount in institute's hygrometric flue gas, to protect
Demonstrate,prove the drying efficiency of drier 3.
The measurement error of the temperature and pressure sensor 4 is not more than 5%.
The gas flowmeter 5 can be vortex-shedding meter, thermal flowmeter or Roots type flowmeter etc..
The error of the measurement dry flue gas cumulative volume flow of the gas flowmeter 5 is not more than 10%.
Adjusting the suction power of the aspiration pump 6 makes flue gas flow rate in the sampling pipe 1 close to point position wet flue gas
Flow velocity, to meet the requirement of isokinetic sampling.
By institute's hygrometric flue gas is generally the clean flue gas after wet scrubbing, therefore by that can be directly discharged to after aspiration pump 6
In air.When institute's hygrometric flue gas still needs to carry out before discharging subsequent treatment in former smoke processing system, the aspiration pump 6 it
After install flue gas processing device additional.
When needing additionally to be attached using pipeline between the part 1~6, the material of pipeline is corrosion resistant hydrophobic
Plastics, internal diameter of the pipeline is not less than 5mm.
On the premise of air-tightness is ensured, the sampling pipe 1, filter 2, drier 3, temperature and pressure sensor 4, gas
Junction between flowmeter body 5 and aspiration pump 6 can use the connected modes such as threaded connection, flange connection, compression joint, and
The acute angle less than 90 ° must not occur, to avoid junction hydrops.
At a temperature of institute's hygrometric flue gas, the sampling pipe 1, filter 2, drier 3, temperature and pressure sensor 4, gas
Flowmeter body 5 and aspiration pump 6 energy normal work, and there is no the change of physical property in its material.
Total temperature drop of the surveyed flue gas in sampling pipe 1 and filter 2 is not more than 1 DEG C.
The plastic material that the insulation material 7 is covering property, thermal insulation is excellent.
The reduction of heater element hygrometric flue-gas temperature to slow down can be disposed with the insulation material 7.
If the gaging hole 9 with diameter greater than the external diameter of the sampling pipe 1, be filled using suitable material, make in flue
Wet flue gas do not escaped from the gaging hole 9.
The plug-in type temperature and pressure sensor 10 length of vertical flue gas flow direction part etc. in flue when measuring
The length of pipe section of vertical flue gas flow direction in flue is located in the sampling pipe 1.
The unitary sampling of the present apparatus and the time of measurement are no less than 30 minutes.
The droplet sample that the present apparatus is obtained can be entered using means such as pH value detection, ion concentration detection, solid content detections
Row analysis.When being analyzed, droplet sample must be reheated to the temperature of institute's hygrometric flue gas, to avoid droplets from solute in sample
The influence that precipitation is caused.
The content of drop is drawn by more than three times survey calculation results averageds in point position wet flue gas, to reduce mistake
Difference.
Claims (9)
1. drop sampling and measuring device in a kind of wet flue gas, it is characterised in that：Including the sampling pipe (1), the filter that are sequentially connected
(2), drier (3), temperature and pressure sensor (4), gas flowmeter (5) and aspiration pump (6), the sampling pipe (1) are located at
Part and filter (2) outside flue are wrapped with insulation material (7)；The filter (2) includes shell (2-1), is arranged on
Filter core (2-5) in shell (2-1), is arranged on the air inlet (2-2) and gas outlet (2-3) at shell (2-1) left and right two ends, sets
In the leakage fluid dram (2-4) and filter core (2-5) of shell (2-1) bottom；The tail end of the sampling pipe (1) and the filter (2)
Air inlet (2-2) is connected；The gas outlet (2-3) of the filter (2) is connected with the drier (3)；The sampling pipe (1) is used
It is L-type bend pipe when vertical gas pass, is U-shaped bend pipe during for horizontal flue, pipeline section and wet flue gas is come the side of stream at its top inlet
To parallel, its top inlet is just to the direction of flow of wet flue gas.
2. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：Sampling pipe (1) position
In vertical flue gas flow direction in flue length of pipe section not less than 50cm or more than point position flue width 1/4；The sampling
The internal diameter for managing (1) is not less than 5mm.
3. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：In the filter (2)
Filter core (2-5) is not less than 1 μm to the filtering accuracy of drop in wet flue gas；The gross weight of the droplet sample of filter (2) collection
1/10 of amount not less than filter (2) initial weight.
4. drop is sampled and measurement apparatus in wet flue gas according to claim 1, it is characterised in that：The temperature and pressure
The measurement error of sensor (4) is not more than 5%.
5. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：The gas flowmeter
(5) be vortex-shedding meter, thermal flowmeter or Roots type flowmeter；The gas flowmeter (5) measures dry flue gas cumulative volume stream
The error of amount is not more than 10%.
6. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：The aspiration pump (6)
Suction power can be adjusted, and make the flue gas flow rate in the sampling pipe (1) close to the flow velocity of point position wet flue gas.
7. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：Before air-tightness is ensured
Put, the sampling pipe (1), filter (2), drier (3), temperature and pressure sensor (4), gas flowmeter (5) and take out
Using threaded connection, flange connection or compression joint, junction occurs without the acute angle less than 90 ° for junction between air pump (6).
8. drop sampling and measuring device in wet flue gas according to claim 1, it is characterised in that：The insulation material (7)
Inside it is disposed with the reduction of heater element hygrometric flue-gas temperature to slow down.
9. a kind of drop sampled measurements method in wet flue gas, it is characterised in that：
Before measurement, gaging hole (9) is opened in institute's hygrometric flue gas point position walling of flue (8) first, and use plug-in type temperature and pressure
Force snesor (10) measures the temperature T of point position wet flue gas0And pressure p0, measure untapped filter in advance using balance
(2) initial weight w0。
During sampled measurements, sampling and measuring device is placed horizontally at outside flue described in claim 1, and sampling pipe (1) is by gaging hole (9)
In insertion flue, pipeline section is parallel with flowing to for wet flue gas at the top inlet of sampling pipe (1), and top inlet flows just to wet flue gas
Direction；In the presence of aspiration pump (6), wet flue gas enter sampling and measuring device from the top inlet of sampling pipe (1), by sampling
Pipe (1) enters filter (2) from the air inlet (2-2) of filter (2), and the leakage fluid dram (2-4) of filter (2) is in measurement process
Close；Drop in flue gas is filtered in filter core (2-5) by filter (2), rests in filter (2), is free of
The flue gas of drop enters drier (3) from the gas outlet (2-3) of filter (2)；In drier (3), the vapor in flue gas
It is removed；Subsequent temperature and pressure sensor (4) measures the temperature T of the dry flue gas now without drop and vapor1And pressure
Power p1, gas flowmeter 5 measures the cumulative volume flow V in time of measuring t of the dry flue gas1；Aspiration pump (6) is provided cigarette
Gas work(required when being extracted out from flue；
By after the sampling of certain hour t, sampling pipe (1) being extracted out from flue, filter (2) is removed rapidly, use day
The flat weight w for measuring sampling after-filter (2)1；The leakage fluid dram (2-4) of filter (2) is opened after the completion of weighing, from filter
(2) air inlet (2-2) and gas outlet (2-3) is blown into cleaned air to filter (2) is interior, will be from leakage fluid dram (2-4) outflow
Liquid is collected into sampling bottle；The liquid of collection is the sample of drop in institute's hygrometric flue gas, and further it can be analyzed,
Detect its chemical property；
The content ω of drop is calculated using following methods in institute's hygrometric flue gas：
1) the temperature T of point position wet flue gas is inquired about0The saturated vapour pressure p of lower vaporw：
2) the cumulative volume flow V of dry flue gas part in point position institute hygrometric flue gas in flue is calculatedd：
Vd=V1×p1×T0/(T1×p0)
3) the cumulative volume flow V of water vapor portion in point position institute hygrometric flue gas is calculatedw：
Vw=Vd×pw/(p0-pw)
4) the total cumulative volume flow V of point position institute hygrometric flue gas is calculated0：
V0=Vd+Vw
5) the content ω of drop in point position wet flue gas is calculated：
ω=(w1-w0)/V0
The content of drop is drawn by more than three times survey calculation results averageds in point position wet flue gas, unitary sampling measurement
Time be no less than 30 minutes；
The content of drop in the chemical property and measured wet flue gas of comprehensive collected droplet sample, can be rotten to institute's hygrometric flue gas
Corrosion power makes assessment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063595.0A CN106706375B (en) | 2016-11-28 | 2016-11-28 | Drop sampling and measuring device and method in a kind of wet flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063595.0A CN106706375B (en) | 2016-11-28 | 2016-11-28 | Drop sampling and measuring device and method in a kind of wet flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106706375A true CN106706375A (en) | 2017-05-24 |
| CN106706375B CN106706375B (en) | 2019-04-09 |
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ID=58934045
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611063595.0A Active CN106706375B (en) | 2016-11-28 | 2016-11-28 | Drop sampling and measuring device and method in a kind of wet flue gas |
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| CN108692997A (en) * | 2018-05-07 | 2018-10-23 | 西安交通大学 | A kind of flue gas droplet content test system and its flue gas drop sampler |
| CN109030122A (en) * | 2018-08-15 | 2018-12-18 | 山东国舜建设集团有限公司 | Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization |
| WO2019090546A1 (en) * | 2017-11-09 | 2019-05-16 | 陈博浩 | Flue gas liquid drop sampling device suitable for coal-fired power plant |
| CN111337545A (en) * | 2019-12-24 | 2020-06-26 | 中国特种设备检测研究院 | Device and method for measuring moisture content of rapid supersaturated flue gas facing wind |
| CN111366422A (en) * | 2020-03-13 | 2020-07-03 | 国电环境保护研究院有限公司 | Method and device for testing slurry fog drops of wet desulphurization system |
| CN113376049A (en) * | 2020-03-10 | 2021-09-10 | 中国石化工程建设有限公司 | Method for measuring smoke-air ratio of catalytic cracking device |
| CN113740197A (en) * | 2021-06-29 | 2021-12-03 | 西安热工研究院有限公司 | System and method for evaluating performance of demister of flue gas seawater desulfurization device |
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| CN113376049B (en) * | 2020-03-10 | 2023-04-07 | 中国石化工程建设有限公司 | Method for measuring smoke-air ratio of catalytic cracking device |
| CN111366422A (en) * | 2020-03-13 | 2020-07-03 | 国电环境保护研究院有限公司 | Method and device for testing slurry fog drops of wet desulphurization system |
| CN113740197A (en) * | 2021-06-29 | 2021-12-03 | 西安热工研究院有限公司 | System and method for evaluating performance of demister of flue gas seawater desulfurization device |
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