CN106706375B - Drop sampling and measuring device and method in a kind of wet flue gas - Google Patents
Drop sampling and measuring device and method in a kind of wet flue gas Download PDFInfo
- Publication number
- CN106706375B CN106706375B CN201611063595.0A CN201611063595A CN106706375B CN 106706375 B CN106706375 B CN 106706375B CN 201611063595 A CN201611063595 A CN 201611063595A CN 106706375 B CN106706375 B CN 106706375B
- Authority
- CN
- China
- Prior art keywords
- flue gas
- filter
- drop
- sampling
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses drop sampling and measuring device and methods in a kind of wet flue gas, are made of sampling pipe, filter, drier, temperature and pressure sensor, gas flowmeter, aspiration pump and thermal insulation material；When the present invention is sampled and is measured to drop in wet flue gas, under the action of aspiration pump, institute's hygrometric flue gas enters from the top inlet of sampling pipe, it flows through sampling pipe and enters filter, drop stop in flue gas is collected as droplet sample in the filter, flue gas without drop enters drier, and in drier, the vapor in flue gas is removed；Temperature and pressure sensor measures the temperature and pressure of the dry flue gas at this time without drop and vapor, and gas flowmeter measures the cumulative volume flow of the dry flue gas, the content of drop in institute's hygrometric flue gas can be calculated according to above data；The present invention, which can solve the prior art, can not carry out the problem of precise measurement and sampling to the drop in wet flue gas in engineering practice, and make accurate evaluation to the corrosivity of wet flue gas.
Description
Technical field
The invention belongs to flue gas inspection technical fields, and in particular to drop sampling and measuring device and side in a kind of wet flue gas
Method.
Background technique
In the flue gas that combustion of fossil fuel generates, contain a large amount of SOX、NOX、HCl、H2The gaseous pollutants such as S.Engineer application
In generally use the method for wet scrubbing these pollutants removed, i.e., rushed using the slurries adverse current largely containing absorbent
Brush flue gas, gaseous pollutant and absorbent in flue gas, which react, generates liquid or solid product, to be taken off from flue gas
It removes.Flue gas by wet scrubbing is wet flue gas, and wherein water vapour content is saturated, and carries a large amount of drops.These drops are logical
Often it is liquid-solid mixture, is mainly made of absorbent slurry and absorbing reaction product.Gaseous state is dirty in wet flue gas after wet scrubbing
It is very low to contaminate object content, 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 reason 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 gas2It is removed, which carries out in desulfurizing tower.Contain a large amount of liquid in the wet flue gas of desulfurizing tower outlet
Drop has very strong corrosivity, and the damage accident layer of desulfurizing tower rear pass, equipment and chimney caused by corroding due to wet flue gas goes out
It is not poor.However, the content of drop has very big difference in wet flue gas after different desulfurizing towers due to the difference that structure is designed and run
Not, it is likely lower than 5g/m3, it is also possible to up to 200g/m3More than, the ingredient of drop is also different, leads to 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
Corrosion phenomenon should be maintained in controlled range by measure, also avoid unnecessary cost.
In recent years, not rarely seen as underestimating corrosion accident caused by the corrosivity of wet flue gas after wet scrubbing.And it is another
The anti-corrosion measure and material that a little producers then be used directly very high-grade, although avoiding corrosion accident, bring it is high at
This, causes biggish waste.Will power corrosive to wet flue gas correctly assessed, it is necessary to measure the liquid in wet flue gas
Content is dripped, and sampling analysis is carried out to drop.However, at present, there is no a kind of accurate and feasible devices to reach in engineer application
To above-mentioned purpose.Therefore, designing a kind of can be applied in the wet flue gas in engineering practice drop sampling and measuring device and has
Highly important meaning.
Summary of the invention
The purpose of the present invention is to provide drop sampling and measuring device and methods in a kind of wet flue gas, solve the prior art pair
Drop in engineering practice in wet flue gas can not carry out the problem of precise 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 detection device below and technical solutions:
Drop sampling and measuring device in a kind of wet flue gas, including sequentially connected sampling pipe 1, filter 2, drier 3, temperature
Degree and pressure sensor 4, gas flowmeter 5 and aspiration pump 6, the sampling pipe 1 are located at 2 outsourcing of part and filter outside flue
It is wrapped with thermal insulation material 7；The filter 2 includes shell 2-1, and the filter core 2-5 in shell 2-1 is arranged in, and setting is left in shell 2-1
The leakage fluid dram 2-4 and filter core 2-5 of the bottom shell 2-1 is arranged in the air inlet 2-2 and gas outlet 2-3 at right both ends；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 is used to when vertical gas pass be L-type bend pipe, is used to when horizontal flue be U-shaped bend pipe, at top inlet pipeline section with
Wet flue gas direction of flow is parallel, the direction of flow of top inlet face 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 is greater 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 acquires
Droplet sample total weight be not less than 2 initial weight of filter 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 keep the flue gas flow rate in the sampling pipe 1 wet close to point position
The flow velocity of flue gas.
Under the premise of guaranteeing air-tightness, the sampling pipe 1, filter 2, drier 3, temperature and pressure sensor 4, gas
Junction between flowmeter body 5 and aspiration pump 6 does not occur sharp less than 90 ° using threaded connection or flanged joint, junction
Angle.
The reduction of heater element hygrometric flue-gas temperature to slow down is disposed in the thermal insulation material 7.
A kind of drop sampled measurements method in wet flue gas, before measurement, first on institute's hygrometric flue gas point position walling of flue 8
Gaging hole 9 is opened, and measures the temperature T of point position wet flue gas using plug-in type temperature and pressure sensor 100And pressure p0, use
Balance measures the initial weight w of not used filter 2 in advance0。
When sampled measurements, sampling and measuring device described in claim 1 is placed horizontally at outside flue, and sampling pipe 1 passes through gaging hole 9
It is inserted into flue, pipeline section is parallel with the flow direction of wet flue gas at the top inlet of sampling pipe 1, top inlet face wet flue gas incoming flow side
To；Under the action of aspiration pump 6, wet flue gas enters 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, is rested in filter 2 when through the filter core 2-5 of filter 2, the flue gas without drop goes out from filter 2
Port 2-3 enters drier 3；In drier 3, the vapor in flue gas is removed；Subsequent temperature and pressure sensor 4 is surveyed
The temperature T of dry flue gas at this time without drop and vapor out1And pressure p1, gas flowmeter 5 measures measuring for the dry flue gas
Cumulative volume flow V in time t1；Aspiration pump 6 provides function required when extracting flue gas from flue out；
After the sampling of certain time t, sampling pipe 1 is extracted out from flue, filter 2 is removed rapidly, day is used
The flat weight w for measuring sampling after-filter 21；The leakage fluid dram 2-4 that 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 blown into cleaned air into filter 2, and the liquid flowed out from leakage fluid dram 2-4 is collected to sampling bottle
In；The liquid of collection is the sample of drop in institute's hygrometric flue gas, can further be analyzed it, its chemical property is detected；
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 inquired0The 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
Results are averaged obtains by survey calculation more than three times for the content of drop 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 of comprehensive collected droplet sample and measured wet flue gas, can be to institute's hygrometric cigarette
Gas corrosion power makes assessment.
Compared to the prior art compared with, the present invention has the advantage 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
Collection for 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 is generally to measure that water vapour content is unsaturated, vapor contains in the flue gas without liquid impurities
Amount, does not catch the essence of wet flue gas after wet scrubbing.
In flue gas after wet scrubbing, its actually hypersaturated state of vapor.Water vapour content is saturated in gas phase, simultaneously also
There are some with liquid existing for drops and solid impurity.Flue gas causes the master corroded after these impurity are only wet scrubbing
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 of vapor is saturated, and can be calculated by steam-laden vapour pressure, without measurement.Corruption to wet flue gas after wet scrubbing
The crucial place that corrosion is assessed is exactly the property for understanding its droplet content and drop.The present invention is exactly pointed out from above two
Hair, is sampled and is measured to drop in wet flue gas after wet scrubbing.
With the sternness of environmental problem, environmentally friendly system it is increasingly strict, wet scrubbing technology is widely used in all trades and professions
Smoke processing system in, and after wet scrubbing caused by wet flue gas corrosion have become 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 avoid
Unnecessary waste, has broad application prospects.
Detailed description of the invention
Fig. 1 is that the present invention carries out drop sampling in wet flue gas and structural schematic diagram when measuring.
Fig. 2 be the present invention be used for horizontal flue when variants structural schematic diagram.
Fig. 3 is the structural schematic diagram of filter in Fig. 1 and Fig. 2.
Fig. 4 is the schematic diagram of plug-in type temperature and pressure sensor measurement wet flue gas temperature and pressure.
Specific embodiment
Structure and working principle of the invention are further described with reference to the accompanying drawing.
Fig. 1 is drop sampling and the structural schematic diagram when work of measuring device in a kind of wet flue gas provided by the invention.
In a kind of wet flue gas provided by the invention drop sampling and measuring device by sampling pipe 1, filter 2, drier 3,
Temperature and pressure sensor 4, gas flowmeter 5, aspiration pump 6 and thermal insulation material 7 form.
Fig. 1 is the present invention for the case in vertical gas pass when wet flue gas, and sampling pipe 1 is L-type bend pipe at this time.Work as the present invention
For when wet flue gas, sampling pipe 1 to be U-shaped bend pipe in horizontal flue.Fig. 2 be the present invention be used for horizontal flue when variants structure
Schematic diagram.
As shown, 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
Mouth is connected, and the outlet of drier 3 is connected with temperature and pressure sensor 4, gas flowmeter 5, the outlet and pumping of gas flowmeter 5
Air pump 6 is connected.
Gaging hole 9 is provided on 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 passes 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 not used 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 thermal insulation material 7.Sampling pipe 1 is inserted into flue by gaging hole 9.The top of sampling pipe 1
Inlet pipeline section is parallel with the flow direction of wet flue gas, top inlet face wet flue gas direction of flow.It is wet under the action of aspiration pump 6
Flue gas enters the present apparatus from the top inlet of sampling pipe 1, enters filter 2 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 when passing through the filter core 2-5 of 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 dry without drop and vapor at this time
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 function required when extracting flue gas from flue out.
After the sampling of certain time t, sampling pipe 1 is extracted out from flue, filter 2 is removed rapidly, day is used
The flat weight w for measuring sampling after-filter 21.In summary measurement data is surveyed using the calculation method calculating in summary of the invention
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
It is blown into cleaned air into filter 2, to help the discharge of liquid in filter 2.The liquid 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.It can further analyze it, examine
Survey its chemical property.
The content of drop in the chemical property of comprehensive collected droplet sample and measured wet flue gas, 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 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 guarantee its top
The direction of flow of end entrance face 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 is greater 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 component in inlet film forming or drop causes to block up
Plug.
The material of shell 2-1 is the corrosion resistant hydrophobics plastics such as polytetrafluoroethylene (PTFE), polypropylene in the filter 2.
It is provided with lid or valve on leakage fluid dram 2-4 in the filter 2, can control unlatching and the pass of leakage fluid dram 2-4
It closes.
Filter core 2-5 is woven by materials such as glass fibre, plastic optical fibre or nylon in the filter 2, or by filter membrane
It is entwined, 1 μm is not less than to the filtering accuracy of drop in wet flue gas.
The sampling process must terminate before a large amount of hydrops occurs in 2 bottom of filter, to reduce the secondary of drop
Entrainment.
The total weight for the droplet sample that the filter 2 acquires is not less than 2 initial weight w of filter01/10, with reduce
The error of weighing.
3 internal desiccant of drier is the neutral desiccant such as anhydrous calcium chloride, silica gel, other than vapor in flue gas
Gas does not generate absorption.
The maximum absorption of 3 internal desiccant of drier 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 that the gas flowmeter 5 measures dry flue gas cumulative volume flow is not more than 10%.
The suction power for adjusting 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.
Since 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 atmosphere.When in former smoke processing system institute's hygrometric flue gas before discharging still need to carry out subsequent processing when, the aspiration pump 6 it
After install flue gas processing device additional.
When needing additionally to be attached using pipeline between the component 1~6, the material of pipeline is corrosion resistant hydrophobic
Plastics, internal diameter of the pipeline are not less than 5mm.
Under the premise of guaranteeing air-tightness, 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 connection types such as threaded connection, flanged joint, compression joint, and
There is not allowed that the acute angle less than 90 °, to avoid junction hydrops.
Institute's hygrometric flue gas at a temperature of, the sampling pipe 1, filter 2, drier 3, temperature and pressure sensor 4, gas
Flowmeter body 5 and aspiration pump 6 can work normally, and the change of physical property does not occur for 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 thermal 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 in the thermal insulation material 7.
If the diameter of the gaging hole 9 is greater than 1 outer diameter of sampling pipe, it is filled, is made in flue using suitable material
Wet flue gas not from the gaging hole 9 escape.
The plug-in type temperature and pressure sensor 10 measure when in flue vertical flue gas flow direction part length etc.
It is located at the length of pipe section of vertical flue gas flow direction in flue in the sampling pipe 1.
The unitary sampling of the present apparatus and the time of measurement are no less than 30 minutes.
The present apparatus obtain droplet sample can using pH value detection, ion concentration detection, solid content detection etc. means into
Row analysis.When being analyzed, droplet sample must be reheated to the temperature of institute's hygrometric flue gas, to avoid solute in droplet sample
It is influenced caused by precipitation.
Results are averaged obtains by survey calculation more than three times for the content of drop in point position wet flue gas, is missed with reducing
Difference.
Claims (8)
1. drop sampled measurements method in the wet flue gas of drop sampling and measuring device, the sampling and measuring device in a kind of wet flue gas
Including sequentially connected sampling pipe (1), filter (2), drier (3), temperature and pressure sensor (4), gas flowmeter (5)
With aspiration pump (6), the sampling pipe (1) is located at part outside flue and filter (2) is wrapped with thermal insulation material (7)；It is described
Filter (2) includes shell (2-1), and the filter core (2-5) being arranged in shell (2-1) is arranged in the left and right ends shell (2-1)
Leakage fluid dram (2-4) and filter core (2-5) in the bottom shell (2-1) is arranged in air inlet (2-2) and gas outlet (2-3)；The sampling
The tail end of pipe (1) is connected with the air inlet (2-2) of the filter (2)；The gas outlet (2-3) of the filter (2) with it is described
Drier (3) is connected；The sampling pipe (1) is used to when vertical gas pass be L-type bend pipe, is used to when horizontal flue be U-shaped bend pipe,
Pipeline section is parallel with wet flue gas direction of flow at top inlet, the direction of flow of top inlet face wet flue gas；
It is characterized by: drop sampled measurements method in the wet flue gas are as follows: before measurement, first in institute's hygrometric flue gas point position
It is opened on walling of flue (8) gaging hole (9), and measures the temperature of point position wet flue gas using plug-in type temperature and pressure sensor (4)
T0And pressure p0, measure the initial weight w of not used filter (2) in advance using balance0；
When sampled measurements, the sampling and measuring device is placed horizontally at outside flue, and sampling pipe (1) is inserted into flue by gaging hole (9)
In, pipeline section is parallel with the flow direction of wet flue gas at the top inlet of sampling pipe (1), top inlet face wet flue gas direction of flow；?
Under the action of aspiration pump (6), wet flue gas enters 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；Cigarette
Drop in gas is filtered in filter core (2-5) by filter (2), is rested in filter (2), the cigarette without drop
Gas enters drier (3) from the gas outlet (2-3) of filter (2)；In drier (3), the vapor in flue gas is removed；With
Temperature and pressure sensor (4) afterwards measures the temperature T of the dry flue gas at this time without drop and vapor1And pressure p1, gas stream
Meter (5) measures the cumulative volume flow V in time of measuring t of the dry flue gas1；Aspiration pump (6) is provided flue gas from flue
Required function when middle extraction；
After the sampling of certain time t, sampling pipe (1) is extracted out from flue, filter (2) is removed rapidly, day is used
The flat weight w for measuring sampling after-filter (2)1；The leakage fluid dram (2-4) that filter (2) are opened after the completion of weighing, from filter
(2) air inlet (2-2) and gas outlet (2-3) is blown into cleaned air into filter (2), will flow out from leakage fluid dram (2-4)
Liquid is collected into sampling bottle；The liquid of collection is the sample of drop in institute's hygrometric flue gas, is further analyzed it, inspection
Survey 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 inquired0The 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
Results are averaged obtains by survey calculation more than three times for the content of drop in point position wet flue gas, unitary sampling measurement
Time be no less than 30 minutes；
The content of drop in the chemical property of comprehensive collected droplet sample and measured wet flue gas, can be rotten to institute's hygrometric flue gas
Corrosion power makes assessment.
2. drop sampled measurements method in wet flue gas according to claim 1, it is characterised in that: sampling pipe (1) position
It is not less than 50cm in the length of pipe section of flue gas flow direction vertical in flue or greater than the 1/4 of point position flue width；The sampling
The internal diameter for managing (1) is not less than 5mm.
3. drop sampled measurements method 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) acquisition
Amount is not less than the 1/10 of filter (2) initial weight.
4. drop sampled measurements method in wet flue gas according to claim 1, it is characterised in that: the temperature and pressure passes
The measurement error of sensor (4) is not more than 5%.
5. drop sampled measurements method in wet flue gas according to claim 1, it is characterised in that: the gas flowmeter
It (5) is 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 sampled measurements method 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 sampled measurements method in wet flue gas according to claim 1, it is characterised in that: before guaranteeing air-tightness
It puts, the sampling pipe (1), filter (2), drier (3), temperature and pressure sensor (4), gas flowmeter (5) and pumping
Junction between air pump (6) does not occur the acute angle less than 90 ° using threaded connection, flanged joint or compression joint, junction.
8. drop sampled measurements method in wet flue gas according to claim 1, it is characterised in that: the thermal insulation material (7)
Inside it is disposed with the reduction of heater element hygrometric flue-gas temperature to slow down.
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 CN106706375A (en) | 2017-05-24 |
| CN106706375B true CN106706375B (en) | 2019-04-09 |
Family
ID=58934045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106706375B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643229A (en) * | 2017-09-28 | 2018-01-30 | 海南电网有限责任公司电力科学研究院 | A kind of Fume moisture method of testing and device |
| WO2019090546A1 (en) * | 2017-11-09 | 2019-05-16 | 陈博浩 | Flue gas liquid drop sampling device suitable for coal-fired power plant |
| 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 |
| CN109030122B (en) * | 2018-08-15 | 2023-12-01 | 山东国舜建设集团有限公司 | Sampling device and method for saturated wet flue gas condensate after wet desulfurization |
| CN111337545B (en) * | 2019-12-24 | 2023-04-07 | 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 |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310038A (en) * | 2001-01-17 | 2001-08-29 | 大连冰山集团有限公司 | Wet electron beam fume desulfurizing process |
| CN2502263Y (en) * | 2001-10-19 | 2002-07-24 | 修光伟 | Measurer for smoke humidity measurement |
| CN101256130A (en) * | 2008-03-13 | 2008-09-03 | 丁志江 | Method and apparatus for measuring water content of high-precision coal gas machinery |
| CN102175556A (en) * | 2011-01-28 | 2011-09-07 | 武汉市天虹仪表有限责任公司 | Automatic moisture content measuring apparatus |
| CN104406826A (en) * | 2014-11-30 | 2015-03-11 | 深圳睿境环保科技有限公司 | Condensable particle sampling device |
| CN205262814U (en) * | 2015-11-25 | 2016-05-25 | 河北涿州京源热电有限责任公司 | A absorbing device for flue gas ammonia escape determination |
-
2016
- 2016-11-28 CN CN201611063595.0A patent/CN106706375B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310038A (en) * | 2001-01-17 | 2001-08-29 | 大连冰山集团有限公司 | Wet electron beam fume desulfurizing process |
| CN2502263Y (en) * | 2001-10-19 | 2002-07-24 | 修光伟 | Measurer for smoke humidity measurement |
| CN101256130A (en) * | 2008-03-13 | 2008-09-03 | 丁志江 | Method and apparatus for measuring water content of high-precision coal gas machinery |
| CN102175556A (en) * | 2011-01-28 | 2011-09-07 | 武汉市天虹仪表有限责任公司 | Automatic moisture content measuring apparatus |
| CN104406826A (en) * | 2014-11-30 | 2015-03-11 | 深圳睿境环保科技有限公司 | Condensable particle sampling device |
| CN205262814U (en) * | 2015-11-25 | 2016-05-25 | 河北涿州京源热电有限责任公司 | A absorbing device for flue gas ammonia escape determination |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106706375A (en) | 2017-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106706375B (en) | Drop sampling and measuring device and method in a kind of wet flue gas | |
| CN103439152B (en) | The polymorphic sampling system of sulfuric anhydride and polymorphic method of testing in Concentration in Fixed Pollutants Source | |
| CN109959538B (en) | Device and method for testing sulfur trioxide and condensable particles emitted by fixed pollution source | |
| CN108303293A (en) | The sampling of sulfur trioxide and detecting system and method in a kind of fire coal boiler fume | |
| CN103471878A (en) | Sampling and collecting system of SO3 in wet method desulphurization system tail flue gas | |
| CN103472061A (en) | Device and method for detecting sulfur trioxide in flue gas on line | |
| CN201935838U (en) | Aerosol sampling device applicable to high-temperature, high-pressure and high-humidity pipeline environment | |
| CN1995956A (en) | Method and device for detecting SO3 content in flue gas | |
| CN109342284A (en) | A kind of detection system and detection method for harmful substances from flue gases | |
| CN203101128U (en) | Particulate matter sampling device | |
| CN102967491A (en) | Particle matter sampling device and method for particle matter detection using device | |
| CN106248442B (en) | SO in a kind of detection flue gas3Method | |
| CN106501443A (en) | For testing the test system of sulfur trioxide concentration and its condenser in flue gas | |
| CN207248581U (en) | A kind of sampling system for being used to measure escape ammonia density total in flue gas | |
| CN110398398A (en) | A kind of the classification sampling system and method for the emission intensity suitable for high-humidity gas fume | |
| CN106996883A (en) | Desulphurization for Coal-fired Power Plant equipment performance tests flue gas droplet sampling apparatus and the method for sampling | |
| CN110208160A (en) | A kind of measurement device and measuring method of flue gas total particulate | |
| CN108414299A (en) | A kind of stationary source exhaust gas sampling apparatus and the method for sampling | |
| CN205067454U (en) | Element sulphur morphological analysis monitoring devices | |
| CN207866584U (en) | The sampling system of sulfur trioxide in a kind of fire coal boiler fume | |
| CN206038527U (en) | Coal fired power plant smoke pollutants minimum discharge on -line monitoring system | |
| CN203490171U (en) | Online detection device for sulfur trioxide in smoke | |
| CN104764649B (en) | A kind of low-concentration flue gas detection pretreatment water-eliminating method and device and its flue gas inspection application system | |
| CN205317611U (en) | Flue gas water capacity detecting system | |
| CN108692997A (en) | A kind of flue gas droplet content test system and its flue gas drop sampler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |