CN108801850A - A kind of flue gas wet flue gas desulfurization gypsum slurries are in line density and pH value combined measurement device and measurement method - Google Patents
A kind of flue gas wet flue gas desulfurization gypsum slurries are in line density and pH value combined measurement device and measurement method Download PDFInfo
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- CN108801850A CN108801850A CN201810644345.9A CN201810644345A CN108801850A CN 108801850 A CN108801850 A CN 108801850A CN 201810644345 A CN201810644345 A CN 201810644345A CN 108801850 A CN108801850 A CN 108801850A
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- 239000002002 slurry Substances 0.000 title claims abstract description 77
- 238000005259 measurement Methods 0.000 title claims abstract description 53
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 47
- 239000010440 gypsum Substances 0.000 title claims abstract description 47
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000003546 flue gas Substances 0.000 title claims abstract description 35
- 230000023556 desulfurization Effects 0.000 title claims abstract description 33
- 238000000691 measurement method Methods 0.000 title abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000011010 flushing procedure Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 210000002966 serum Anatomy 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to machinery equipment field more particularly to a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value combined measurement device and measurement method.Device provided by the invention includes：Case is measured, measures and is provided with venthole at the top of case, bottom is provided with thick liquid discharge mouth, and the densitometer and pH meter stretched into babinet is equipped on babinet；The sampling line being connected with measurement case, for being connected with the bottom of tower of smoke-gas wet desulfurization tower, the other end is extend into the babinet for measuring case for one end of sampling line；One end that sampling line is extend into babinet is provided with spray head.In the present invention, the slurries of smoke-gas wet desulfurization tower bottom of tower are entered by the sampling line of measuring device in the measurement case of measuring device, and by that will measure the control of the liquid level of slurry in case in the sensor for not crossing densitometer and pH meter, measurement obtains the density and pH value of slurries.Measuring device provided by the invention can realize that gypsum slurries are accurately measured in the low-maintenance of line density and pH value, consistently online and height.
Description
Technical field
The invention belongs to machinery equipment field more particularly to a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value
Combined measurement device and measurement method.
Background technology
Recent years, with the serious of environmental pollution, country has put into effect a series of policies and thermal power plant is encouraged to implement to surpass
Low emission is transformed, transformation after-burning coal smoke power-plant flue gas SO2Concentration of emission requires control in 35mg/Nm3Hereinafter, this is to desulphurization system
Safety, economical operation propose tightened up requirement.Currently, in Limestone-gypsum Wet Flue Gas Desulfurization Process system, gypsum slurries density
It is two important parameters of Limestone-gypsum Wet Flue Gas Desulfurization Process with pH value, operation, the control of whole system is played vital
Effect.Gypsum slurries pH value is one of the main control parameters of Limestone-gypsum Wet Flue Gas Desulfurization Process technique, to the shadow of desulfuration efficiency
Sound is the most notable, and it is one of the key factor that guarantee system is well run to select suitable pH value.Under normal circumstances, absorption tower is starched
Liquid pH value should control between 5.0~5.4.In actual operation, it should find and be suitble to this desulphurization system pH value operation and control range,
While the indexs such as desulfuration efficiency reach requirement, system energy consumption is reduced.Serum density control is mainly by keeping absorption tower
Output balance, the slurries delivery flow on absorption tower is controlled to realize.It is absorbed simultaneously by adjusting to return from hydrocyclone
The spillway discharge and underflow slurry liquid measure of tower carry out stable slurry density.Keep serum density stablize for improve system desulfuration efficiency,
The quality of by-produced gypsum and equipment scaling is prevented to be advantageous.Gypsum slurries density is controlled in operation in a suitable model
(1080~1100kg/m in enclosing3), be conducive to the efficient of desulphurization system, economy and safe operation.It controls and joins in view of two above
Several importance, it is therefore necessary to configure on-line continuous combined measurement device, realize gypsum slurries pH value that absorption tower be discharged with
The accurate measurement of density, to ensure the safe and stable operation of desulphurization system.
Desulfurizer gypsum slurries pH value is often with measurement method at present：It is installed on gypsum slurries slurry pump outlet conduit
Branch pipe installs plug-in type pH electrodes on branch pipe, while introducing flushing water, rinses pH electrodes.The disadvantage is that：PH electricity in outlet conduit
Slurry flow rate at pole is higher, fluid erosion electrode easy to wear；Rinse mouth face electrode, the interior water flow velocity that rinses of pipeline is larger, meeting
Impact failure electrode, causes glass electrode to rupture when serious, can not use；Gypsum particle causes to dismantle in surrounding them fouling
Difficulty is not easy to periodic calibrating.When system shutdown for a period of time when, also need a pH electrodes to remove and be immersed in the water protection, otherwise
Exposure in air, can influence measurement accuracy, electrode failure can be caused to scrap when serious electrode for a long time.This increases operation and maintenance
Personnel's maintenance.
Desulfurizer gypsum slurries density often with measurement method is set on the outlet conduit of gypsum slurries discharge pump at present
A bit of slurries shunt valve is set, slurries are introduced into shunt valve, density measure is carried out by duct type mass flowmenter.But it bypasses
The caliber of pipeline is smaller, and there is strict demand in while measuring serum density to flow velocity, and deposition is also easy to produce when flow velocity is low, blocks and measures
Pipe；When flow velocity is high slurries to measure transducer wall's abrasion it is larger, influence measurement accuracy, when serious can worn out measurement pipe, lead to quality stream
Gauge is scrapped.The caliber difference of shunt valve and main pipeline can make the slurry flow rate of measurement point generate larger fluctuation, it is difficult to control,
Therefore cause mass flowmenter that cannot run steadily in the long term.
Gypsum slurries density and pH value cannot reliable, accurately on-line measurement, desulphurization system just can not timely for slurry and
Plasma discharge, pH value is too low also to cause system corrosion serious, reduce the service life of equipment, in addition make desulphurization system be difficult to it is economical,
The operation of safety.Therefore, a kind of low-maintenance, consistently online, high accurately gypsum slurries density and pH value combined measurement dress are developed
It sets, is those skilled in the art's technical barrier urgently to be resolved hurrily.
Invention content
Join in line density and pH value in view of this, the purpose of the present invention is to provide a kind of flue gas wet flue gas desulfurization gypsum slurries
Close measuring device and measurement method, device provided by the invention realize gypsum slurries the low-maintenance of line density and pH value,
Consistently online and height accurately measure.
The present invention provides a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value combined measurement device, including：
Case is measured, is provided with venthole at the top of the measurement case, bottom is provided with thick liquid discharge mouth, is equipped with and stretches on babinet
Densitometer in babinet and pH meter；
The sampling line being connected with the measurement case, one end of the sampling line is for the tower with smoke-gas wet desulfurization tower
Bottom is connected, and the other end is extend into the babinet for measuring case；The sampling line extend into the setting of one end in the babinet
There is spray head.
Preferably, the sampling line is disposed with sampling electric butterfly valve and sampling along slurries flow direction and adjusts manually
Diaphragm valve.
Preferably, it is additionally provided with flushing water water inlet on the sampling line.
Preferably, the measuring device further includes the water flushing line being connected with the flushing water water inlet；The water punching
It washes and is provided with electric butterfly valve on pipeline.
Preferably, the measuring device further includes the plasma discharge pipeline being connected with the thick liquid discharge mouth；The discharge pipe road is set
It is equipped with plasma discharge electric butterfly valve.
Preferably, the densitometer is mounted on the side wall of the babinet；
The pH meter is mounted on the top of the babinet.
Preferably, the density is calculated as tuning-fork type densitometer；
The pH meter is immersion abrasion-resistance glass electrode pH meters.
Preferably, it is provided with overflow port on the side wall for measuring case.
Preferably, the babinet top for measuring case is cylindrical shape, and lower part is cone.
The present invention provides a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value union measuring method, including with
Lower step：
A) sampling line of measuring device described in the slurries Pass through above-mentioned technical proposal of smoke-gas wet desulfurization tower bottom of tower enters
In the measurement case of the measuring device；
B) sensor and the pH meter by the liquid level of slurry control in the measurement case in excessively not described densitometer
Sensor, measurement obtain the density and pH value of slurries.
Compared with prior art, the present invention provides a kind of flue gas wet flue gas desulfurization gypsum slurries combines in line density and pH value
Measuring device and measurement method.Measuring device provided by the invention includes：Case is measured, is provided at the top of the measurement case logical
Stomata, bottom are provided with thick liquid discharge mouth, and the densitometer and pH meter stretched into babinet is equipped on babinet；It is connected with the measurement case
Sampling line, for being connected with the bottom of tower of smoke-gas wet desulfurization tower, the other end extend into the survey for one end of the sampling line
In the babinet of measuring tank；One end that the sampling line is extend into the babinet is provided with spray head.In the present invention, flue gas is wet
The slurries of method desulfurizing tower bottom of tower are entered by the sampling line of the measuring device in the measurement case of the measuring device, pass through by
Liquid level of slurry in the measurement case is controlled in the sensor of the excessively not described densitometer and the sensor of the pH meter, is measured
To the density and pH value of slurries.Due to the bottom of tower phase of the sampling line and smoke-gas wet desulfurization tower of measuring device provided by the invention
Connection, can obtain the gypsum slurries of desulfurizing tower bottom of tower and measure its density and pH value in real time, to realize to gypsum slurries density
It is measured with the consistently online of pH value.It is to be measured when measuring device is run since measuring device provided by the invention is provided with spray head
Slurries, which need to flow through after spray head makes its volume dilatation, can just enter in measurement case, so as to abolish the gas in gypsum slurries
Bubble realizes steam-water separation, and then ensures the required fluid state of densimeter measurement, reduces gypsum slurries aeration densitometer
Measurement accuracy.Since thick liquid discharge mouth is arranged in measuring device provided by the invention, measuring device at runtime, can be measured by opening
The thick liquid discharge mouth in bottom portion excludes to measure case solid, prevents from blocking；When stoppage in transit maintenance, the plasma discharge that closing measures bottom portion can be passed through
Mouthful, so that measurement case is maintained liquid level, so that the sensor of pH meter is submerged in a liquid, prevent the dry and astringent damage of measuring electrode.In this hair
Flushing water water inlet is additionally provided in the preferred embodiment of bright offer, on sampling line, it can be achieved that being timed punching to measuring device
It washes, preventing slurries, product stream blocks for a long time.As it can be seen that the measuring device provided through the invention can realize gypsum slurries in line density
It is accurately measured with low-maintenance, consistently online and the height of pH value, makes that desulfurizer is safer, economical operation.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is flue gas wet flue gas desulfurization gypsum serum density provided in an embodiment of the present invention and the online combined measurement dress of pH value
It sets.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value combined measurement device, including：
Case is measured, is provided with venthole at the top of the measurement case, bottom is provided with thick liquid discharge mouth, is equipped with and stretches on babinet
Densitometer in babinet and pH meter；
The sampling line being connected with the measurement case, one end of the sampling line is for the tower with smoke-gas wet desulfurization tower
Bottom is connected, and the other end is extend into the babinet for measuring case；The sampling line extend into the setting of one end in the babinet
There is spray head.
It is that flue gas wet flue gas desulfurization gypsum serum density provided in an embodiment of the present invention and pH value are combined online referring to Fig. 1, Fig. 1
Measuring device.Wherein, 1 is sampling line, and 2 adjust diaphragm valve manually for sampling electric butterfly valve, 3 for sampling, and 4 be overflow port, and 5 are
Spray head, 6 be pH meter, and 7 be densitometer, and 8 is measure case, and 9 be observation window of liquid level, and 10 be venthole, and 11 be thick liquid discharge mouth, and 12 be row
Electric butterfly valve is starched, 13 be water flushing line, and 14 rinse electric butterfly valve for water.
Measuring device provided by the invention includes sampling line 1 and measurement case 8.Wherein, one end of sampling line 1 be used for
The bottom of tower of smoke-gas wet desulfurization tower is connected, and the other end is extend into the babinet for measuring case 8, is used for the stone of smoke-gas wet desulfurization tower
Cream slurries, which are delivered to, measures case 8, and the mode of conveying is preferably flow automatically.In the present invention, gypsum slurries corrosive wear in order to prevent
Pipeline, sampling line 1 preferably use DN80 inner liner rubber carbon steel pipes.
In the present invention, sampling line 1 is preferably disposed with sampling electric butterfly valve 2 and sampling hand along slurries flow direction
It is dynamic to adjust diaphragm valve 3.Wherein, sampling electric butterfly valve 2 is used to open or closes sampling line 1, by opening the electric butterfly valve, cigarette
Gas wet desulfuration tower gypsum slurries are flow to along sampling line 1 measures case 8, which needs to stop transport or close the electricity when rinsing
Dynamic butterfly valve；Sampling adjusts diaphragm valve 3 for the height of liquid level according to smoke-gas wet desulfurization tower manually, manually adjusts sampling line 1
Flow, achieve the purpose that keep measure 8 liquid level of case.
In the present invention, flushing water water inlet is preferably additionally provided on sampling line 1, water flushing can pass through the water inlet
Into in sampling line 1, flushing is timed to sampling line 1 and measurement case 8, product stream blocks for a long time to prevent slurries.
In the present invention, the flushing water water inlet is preferably provided between sampling electric butterfly valve 2 and the manual adjusting diaphragm valve 3 of sampling.
In the present invention, the measuring device preferably further includes the water flushing line 13 being connected with the flushing water water inlet, the water
It is preferably provided with water on flushing line 13 and rinses electric butterfly valve 14, so as to rinse the realization of electric butterfly valve 14 to surveying by switching water
The flushing that amount device is timed.In the present invention, water flushing line 13 preferably uses DN50 carbon steel pipes.
In the present invention, one end that sampling line 1 is extend into the babinet is provided with spray head 5, and spray head 5, which is located at, to be surveyed
On the design liquid level of measuring tank 8.In the present invention, the flow of spray head 5 is preferably 270L/min；The inlet pressure of spray head 5
Preferably 0.5bar；The connection size of spray head 5 is preferably 1-1/2；The spray angle of spray head 5 is preferably 70~120 °, more
Preferably 90 °；Spray head 5 is preferably solid-cone (type) nozzle.In the present invention, slurries can make volume dilatation by spray, to broken
Except the bubble in gypsum slurries, steam-water separation is realized, and then ensure the required fluid state of densimeter measurement.In the present invention
In, gypsum slurries corrosive wear spray head in order to prevent, the material of spray head 5 is preferably 316L stainless steels.
In the present invention, it measures and the pH meter 6 and densitometer 7 stretched into babinet is installed on the babinet of case 8, be used for online survey
Measure the pH value and density of slurries.In the present invention, pH meter 6 is preferably immersion abrasion-resistance glass electrode pH meters, and pH meter 6 is preferred to be installed
At the top of the babinet, the mode of installation is preferably inserted type of flange installation.In the present invention, densitometer 7 is preferably tuning fork
Formula densitometer, densitometer 7 are preferably mounted on the side wall of the babinet, and the mode of installation is preferably inserted type of flange installation.
In the present invention, the top for measuring case 8 is provided with venthole 10, and the pressure balance in case 8 is measured for maintaining.
In the present invention, the bottom for measuring case 8 is provided with thick liquid discharge mouth 11, and playing exclusion measurement 8 solid of case prevents blocking
Purpose, it should be noted that thick liquid discharge mouth 11 can the row of realization it is solid, avoid the slurry in babinet to empty again.In the present invention, institute
It further includes the plasma discharge pipeline being connected with thick liquid discharge mouth 11 to state measuring device, and the plasma discharge pipeline preferably uses DN80 inner liner rubber carbon steels
Pipe.In the present invention, the discharge pipe road is preferably provided with plasma discharge electric butterfly valve 12, is used to open or closes discharge pipe,
The measuring device is opened when putting into operation, and for discharging gypsum slurries, the measuring device is closed when stopping transport, and measurement case 8 is made to keep
There is liquid level, so that the sensor of pH meter 6 is submerged in a liquid, prevent the dry and astringent damage of the sensor of pH meter.
In the present invention, it measures and is preferably additionally provided with overflow port 4 on the side wall of case 8, maintain to measure case using overflow port 4
8 liquid level.In the present invention, the measuring device preferably further includes the overflow passage being connected with overflow port 4, the overflow passage
The other end be passed through the melt pit of smoke-gas wet desulfurization tower, the overflow port 4 is preferably DN100 inner liner rubber carbon steel pipes.
In the present invention, it measures and is preferably additionally provided with observation window of liquid level 9 on the side wall of case 8 for observing and measuring case liquid level.
In the present invention, the material for measuring case 8 is preferably polypropylene (PP)；The babinet top for measuring case 8 is preferably cylinder
Shape, lower part are preferred conical, conical horizontal tilt angle preferably ≮ 60 °.
The present invention also provides a kind of flue gas wet flue gas desulfurization gypsum slurries in line density and pH value union measuring method, including
Following steps：
A) sampling line of measuring device described in the slurries Pass through above-mentioned technical proposal of smoke-gas wet desulfurization tower bottom of tower enters
In the measurement case of the measuring device；
B) sensor and the pH meter by the liquid level of slurry control in the measurement case in excessively not described densitometer
Sensor, measurement obtain the density and pH value of slurries.
It, can be real-time since the sampling line of measuring device provided by the invention is connected with the bottom of tower of smoke-gas wet desulfurization tower
It obtains the gypsum slurries of desulfurizing tower bottom of tower and measures its density and pH value, gypsum slurries density and pH value are continued to realize
On-line measurement.Since measuring device provided by the invention is provided with spray head, when measuring device is run, slurries needs to be measured flow through
Spray head can just enter after making its volume dilatation in measurement case, so as to abolish the bubble in gypsum slurries, realize carbonated drink point
From, and then ensure the required fluid state of densimeter measurement, reduce gypsum slurries aeration densimeter measurement accuracy.By
Thick liquid discharge mouth is set in measuring device provided by the invention, measuring device at runtime, can measure the plasma discharge in bottom portion by unlatching
Mouthful, it excludes to measure case solid, prevents from blocking；When stoppage in transit maintenance, the thick liquid discharge mouth in bottom portion can be measured by closing, measurement case be made to protect
Hold liquid level, so that the sensor of pH meter is submerged in a liquid, prevent the dry and astringent damage of measuring electrode.In preferred side provided by the invention
Flushing water water inlet is additionally provided in case, on sampling line, it can be achieved that being timed flushing to measuring device, when preventing slurries long
Between product stream block.As it can be seen that the measuring device provided through the invention can realize gypsum slurries the low-maintenance of line density and pH value,
Consistently online and height accurately measure, and make that desulfurizer is safer, economical operation.
For the sake of becoming apparent from, it is described in detail below by following embodiment.
Embodiment 1
The flue gas wet flue gas desulfurization gypsum serum density and pH value for present embodiments providing a kind of structure as shown in Figure 1 join online
Close measuring device, including sampling line 1, sampling electric butterfly valve 2, the manual adjusting diaphragm valve 3 of sampling, overflow port 4, spray head 5, pH
Meter 6, measures case 8, observation window of liquid level 9, venthole 10, thick liquid discharge mouth 11, plasma discharge electric butterfly valve 12, water flushing line at densitometer 7
13, water rinses electric butterfly valve 14, flushing water water inlet (Fig. 1 is not marked), overflow passage (Fig. 1 is not marked) and plasma discharge pipeline (Fig. 1
It does not mark).Wherein, the connection relation of each component, optional material and function hereinbefore by the agency of, details are not described herein.
In the present embodiment, spray head 5 is solid-cone (type) nozzle, inlet pressure 0.5bar, connection size 1-1/2, jet angle
Degree is 90 °.
In the present embodiment, the babinet top for measuring case 8 is cylindrical shape, and size φ 800, height 900mm, lower part is circle
Cone, cone height 700mm, conical horizontal tilt angle ≮ 60 degree.The setting of densitometer 7 height is from measurement 8 bottom of cylinder of case
200mm, the setting of overflow port 4 height are arranged from 8 bottom of cylinder 400mm of case, pH meter 6 is measured at the top for measuring case 8.
The measuring device carrying out practically operating mode：8~12wt% of solid content of fed slurry when operation, feed rate 270~
300L/min, liquid level maintain height from case bottom of cylinder 400mm is measured, and pH meter determination data is 5~5.8, density measurement data
In 1050~1100kg/m3, per tour (6~12h) is rinsed primary.Measuring device is run 1 year or more, does not occur blocking and measuring different
Often.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of flue gas wet flue gas desulfurization gypsum slurries are in line density and pH value combined measurement device, including：
Case is measured, is provided with venthole at the top of the measurement case, bottom is provided with thick liquid discharge mouth, is equipped on babinet and stretches into babinet
Interior densitometer and pH meter；
The sampling line being connected with the measurement case, one end of the sampling line is for the bottom of tower phase with smoke-gas wet desulfurization tower
Even, the other end is extend into the babinet for measuring case；One end that the sampling line is extend into the babinet is provided with spray
Drench head.
2. measuring device according to claim 1, which is characterized in that the sampling line is set successively along slurries flow direction
It is equipped with sampling electric butterfly valve and sampling adjusts diaphragm valve manually.
3. measuring device according to claim 1, which is characterized in that be additionally provided with flushing water water inlet on the sampling line
Mouthful.
4. measuring device according to claim 3, which is characterized in that the measuring device further include with the flushing water into
The connected water flushing line in the mouth of a river；It is provided with electric butterfly valve on the water flushing line.
5. measuring device according to claim 1, which is characterized in that the measuring device further includes and the thick liquid discharge mouth phase
Plasma discharge pipeline even；The discharge pipe road is provided with plasma discharge electric butterfly valve.
6. measuring device according to claim 1, which is characterized in that the densitometer is mounted on the side wall of the babinet
On；
The pH meter is mounted on the top of the babinet.
7. measuring device according to claim 1, which is characterized in that the density is calculated as tuning-fork type densitometer；
The pH meter is immersion abrasion-resistance glass electrode pH meters.
8. measuring device according to claim 1, which is characterized in that be provided with overflow port on the side wall for measuring case.
9. measuring device according to claim 1, which is characterized in that the babinet top for measuring case is cylindrical shape, under
Portion is cone.
10. a kind of flue gas wet flue gas desulfurization gypsum slurries include the following steps in line density and pH value union measuring method：
A) slurries of smoke-gas wet desulfurization tower bottom of tower by the sampling line of any one of claim 1~9 measuring device into
Enter in the measurement case of the measuring device；
B) liquid level of slurry in the measurement case is controlled in the sensor of the excessively not described densitometer and the sensing of the pH meter
Device, measurement obtain the density and pH value of slurries.
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