CN109030739A - A kind of pH value of slurry of desulfuration absorption tower and density online testing device and method - Google Patents

A kind of pH value of slurry of desulfuration absorption tower and density online testing device and method Download PDF

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CN109030739A
CN109030739A CN201810857172.9A CN201810857172A CN109030739A CN 109030739 A CN109030739 A CN 109030739A CN 201810857172 A CN201810857172 A CN 201810857172A CN 109030739 A CN109030739 A CN 109030739A
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density
tank
slurry
absorption tower
value
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CN109030739B (en
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贾西部
高皓
李红军
孙若晨
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China Datang Corp Science and Technology Research Institute Co Ltd Northwest Branch
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China Datang Corp Science and Technology Research Institute Co Ltd Northwest Branch
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/02Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
    • G01N9/04Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids

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Abstract

The invention discloses a kind of pH value of slurry of desulfuration absorption tower and density online testing device and method, which includes absorption tower, surge tank, density tank and processor;Absorption tower serum outlet is connected to surge tank bottom slurry entrance, and the outlet of surge tank top slurry is connected to density pot bottom injection point, and surge tank is equipped with pH tester;Density tank is equipped with overflow port;Density tank is connected with weighing component.The test method includes: to claim density tank weight m0;It is passed through process water to density tank, claims density tank and process water gross weight m1, pass through V=(m1‑m0)/ρWaterObtain density tank volume V;With c1Flow is passed through slurries to surge tank and density tank, surveys slurries pH, claims slurries and density tank gross weight m, passes through ρ=(m-m0)/V obtains serum density ρ.The present invention realizes that slurry pH value and density accurately measure online, avoids density measurements distortion caused by influence and blocking of the slurries foam to measurement result.

Description

A kind of pH value of slurry of desulfuration absorption tower and density online testing device and method
Technical field
The invention belongs to heat-engine plant desulfurized systems technology field, more particularly, to a kind of pH value of slurry of desulfuration absorption tower and Density online testing device and method.
Background technique
The pH value and density of absorption tower slurries are the important monitoring indexes of desulphurization system operation.If slurries pH is too low, Sulfur dioxide assimilation effect is poor, and desulfuration efficiency is relatively low;If pH is excessively high, limestone utilization and gypsum purity decline are unfavorable for The progress of desulphurization reaction.If serum density is too low, the solid contents such as lime stone and gypsum in slurries are lower, and desulfuration efficiency is inclined Low, dehydrated gypsum moisture content is higher;If serum density is excessively high, not only equipment attrition and system operation power consumption are bigger than normal, can also lead It causes slurries oxidation and crystallization to be deteriorated, leads to problems such as desulfuration efficiency decline and gypsum moisture content higher.
Absorption tower slurries pH and density are to instruct two critical datas of combustion adjustment.In actual production process, often deposit Data deviation it is larger and distortion the case where.
Absorption tower slurries pH is generally tested using electrode method, and absorption tower slurries are that liquid consolidates mixture, is different from uniform state Aqueous solution, therefore pH value test need carried out under slurries flow regime;The pH of conventional slurries is tested, and directly pacifies pH meter On slurries flow line, due to containing a large amount of gypsum crystallization body and silica impurity, excessively high slurry stream in slurries Speed causes pH meter wear to electrodes serious, substantially reduces its service life, while disturbed test precision.
The test of absorption tower fluid densitometer generallys use difference gauge and measures, and slurries flow in stable condition situation Under, test accuracy is preferable, if entrainment of bubble or foam in slurries, by severe jamming test result.There are also once There is a situation where blocking, measurement result will be distorted for difference gauge one end.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of pH value of slurry of desulfuration absorption tower and density online testing device, The online accurate measurement of absorption tower slurry pH value and density is realized, meanwhile, slurries foam is avoided to pH value and density measure As a result influence reduces abrasion of the larger solid impurity to pH tester electrode in slurries, solves density caused by blocking The problem of measurement result is distorted.
In order to achieve the above object, the present invention is resolved using following technical scheme.
A kind of pH value of slurry of desulfuration absorption tower and density online testing device, comprising: absorption tower, surge tank, density tank and Processor;The serum outlet on the absorption tower is connected to by slurries delivery pipe with the bottom slurry entrance of the surge tank, described The top slurry outlet of surge tank is connected to by connecting tube with the bottom slurry entrance of the density tank, in the slurries delivery pipe It is provided with flowmeter, the slurries delivery pipe is also connected with process water water inlet pipe.
PH tester is provided at the top of the surge tank, the electrode of the pH tester is inserted into the surge tank;Institute It states and is provided with multiple overflow ports on the side wall of density tank, and multiple overflow ports are arranged in same level, it is each described Overflow port is connected separately with inclined tube, is provided with liquid-contacting part below each inclined tube, and the lower port of the inclined tube is towards institute The liquid feeding end of liquid-contacting part is stated, and multiple liquid-contacting parts are interconnected;The liquid-contacting part bottom is provided with the first discharge Pipe;Top cover is provided at the top of the density tank, the top cover is connected with weighing component by suspending rod;The pH tester The signal output end of signal output end and the weighing component is believed with the pH value signal input part of the processor and weight respectively The connection of number input terminal, the signal output end of the processor are connected with display screen.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, the serum outlet on absorption tower pass through Slurries delivery pipe is connected to the bottom slurry entrance of surge tank, and the top slurry outlet of surge tank passes through connecting tube and density tank The connection of bottom slurry entrance, surge tank and density tank are arranged in series, and slurries is made to first pass through surge tank pH value determination, are reduced defeated The influence that the temperature difference of slurries measures True pH Value in absorption tower during sending;The design of slurries bottom in and top out in surge tank, The solid impurity in slurries is reduced to the wear to electrodes of pH tester, extends electrode life;It is arranged in slurries delivery pipe There is flowmeter, convenient for obtaining the flow for the slurries for entering surge tank and density tank, and then controls the flow, guarantee measurement accuracy; Slurries delivery pipe is also connected with process water water inlet pipe, which is passed through density tank for demarcating to density tank, in addition, just Device is rinsed in introducing process water into device.
PH tester is provided at the top of surge tank, the electrode of pH tester is inserted into surge tank, for testing surge tank The pH value of interior slurries.Multiple overflow ports are provided on the side wall of density tank, and multiple overflow ports are arranged in same level, often A overflow port is connected separately with inclined tube, is provided with liquid-contacting part below each inclined tube, and the lower port of inclined tube is towards liquid-contacting part Liquid feeding end, and multiple liquid-contacting parts be interconnected, liquid-contacting part bottom is provided with the first delivery pipe, makes the foam of slurry surface Tank body is taken out of together when slurries are from the outlet outflow of buffering tank top, avoids the intracorporal pH value of tank and weight measurement by steeping in slurries The influence of foam improves measurement accuracy.Top cover is provided at the top of density tank, top cover is connected with weighing component by suspending rod, makes Density tank is suspended on weighing component, convenient for weighing the weight of density tank and its internal slurries, top cover make density tank weight not by External air flow influences, and improves density measurement accuracy.The signal output end of pH tester and the signal output end difference of weighing component It is connect with the pH value signal input part of processor and weight signal input terminal, the signal output end of processor is connected with display screen. For pH value and weight to be transferred to processor, and weight value is converted into serum density, shows slurries eventually by display PH value and density, slurries desulfurization quality is monitored online convenient for operations staff.
In addition, pH value of slurry of desulfuration absorption tower provided by the invention and density online testing device can also have it is following attached Add technical characteristic:
Preferably, the periphery of the density tank is provided with protective pot, and the bottom of the protective pot offers circular hole, the circle The inner wall in hole is connected to by hose with the injection point of the bottom of the density tank;The top slurry outlet of the surge tank passes through Connecting tube is connected to the hose.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, the periphery of density tank are provided with guarantor Tank is protected, the bottom of protective pot offers circular hole, and the inner wall of circular hole is connected to the injection point of the bottom of density tank by hose, is delayed The top slurry outlet for rushing tank is connected to by connecting tube with hose.Make to form buffer area between density tank and connecting tube, and then subtracts Influence of the small connecting tube to density tank weight test accuracy.
Preferably, the lowest point of the connecting tube is provided at right-angle turning, is provided with discharge outlet at the right-angle turning, The discharge outlet is connected with the second delivery pipe, is provided with the first valve on second delivery pipe.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, the lowest point of connecting tube are provided with At right-angle turning, discharge outlet is provided at right-angle turning, discharge outlet is connected with the second delivery pipe, and is provided on the second delivery pipe One valve.Make the accumulation of impurities in slurries at right-angle turning, and be discharged by discharge outlet, avoids density pot bottom injection point Blocking.In addition, the process water in density tank is easily discharged, after demarcating density tank volume convenient for passing through slurries and process water Second delivery pipe flows into trench, and with the emission circular treatment in trench and utilizes.
Preferably, the bottom of the surge tank is provided with third delivery pipe, is provided with the second valve on the third delivery pipe Door.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, the bottom of surge tank are provided with Three delivery pipes are provided with the second valve on third delivery pipe, convenient for the deposit inside dredging surge tank, carry out to surge tank clear It washes.
Preferably, delivery pump, the injection point of the delivery pump and the surge tank are provided in the slurries delivery pipe Between be provided with regulating valve.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device are provided in slurries delivery pipe defeated Pump is sent, slurries is enable smoothly to be introduced into surge tank, regulating valve is provided between delivery pump and surge tank injection point, for subtracting The slow flow velocity into surge tank and the slurries of density tank reduces larger impurity in slurries washing away and grind to pH tester electrode Damage, meanwhile, the measurement accuracy of density tank can be improved in slow slurry flow rate.
Preferably, it is provided with multiple grooves on the inner sidewall of the top cover, is provided on the inner sidewall of the density tank more A boss, the groove can be with the fixed clampings of the boss.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device are provided on the inner sidewall of top cover Multiple grooves, are provided with multiple boss on the inner sidewall of density tank, groove can with boss is fixed is clamped.Density tank is set to pass through top cover It is suspended to below weighing component, convenient for weighing density tank weight.
Preferably, the pH tester is two.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, pH tester are two, make one When a pH tester damages, another can also continue to measure, in addition, two pH are measured when tester simultaneous, measurement result be made more Reflect the pH value of true slurry.
Preferably, third valve is provided on the process water water inlet pipe.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device are provided on process water water inlet pipe Third valve controls the flow velocity of flushing water when rinsing convenient for device.
Preferably, the liquid-contacting part is infundibulate.
PH value of slurry of desulfuration absorption tower according to the present invention and density online testing device, liquid-contacting part are infundibulate, are kept away Exempt from spilling slurries to fall on outside liquid-contacting part, influences the bare weight of tank body itself.
A kind of pH value of slurry of desulfuration absorption tower and density on-line testing method, based on a kind of pH value of slurry of desulfuration absorption tower and Density online testing device, comprising the following steps:
Step 1, density tank is demarcated: firstly, top cover and density tank are connected together, and being suspended to weighing by suspending rod It is m by weighing component to weigh density tank own wt below component0;Then, by process water water inlet pipe to surge tank and It is passed through process water in density tank, after density tank overflow port has process water spilling, weighs density tank and technique by weighing component The total weight of water is m1, pass through formula V=(m1-m0)/ρWater, calculating density tank volume is V;Finally, passing through connecting tube Right-angle turning at discharge outlet emptying surge tank and density tank in process water;
Step 2, slurries in absorption tower slurry pH value and density measurement: are passed through by surge tank and density tank by delivery pump It is interior, regulating valve is adjusted, flowmeter registration c is made1, from overflow port outflow and after non-foam is overflowed, pass through after slurries in density tank It is h that pH tester, which measures slurry pH value,1, slurries are weighed by weighing component and density tank total weight is m, pass through formula ρ =(m-m0It is ρ that serum density, which is calculated, in)/V.
Preferably, the c1For 0.5-0.7L/min.
Density measurement mechanism in pH value of slurry of desulfuration absorption tower and density on-line testing method of the invention is broken at present The differential pressure method of mainstream measures slurries real density from the most fundamental density calculation method;It avoids in differential pressure method and starches simultaneously Influence of the problems such as vacuole foam and blocking to measurement result provides a kind of new thinking and side for the serum density test on absorption tower Method.By the control of slurry flow rate, reduces solid impurity to the erosive wear of pH tester electrode, extend pH tester electrode Service life, while reducing the weighing error of density tank, and then improve the precision of density measure.When test, it is only necessary to density The weight and volume of tank is re-scaled influence of the fouling to density measurements that can avoid in density tank, and measurement is accurate Property it is high.
Detailed description of the invention
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is that a kind of structure of embodiment of pH value of slurry of desulfuration absorption tower and density online testing device of the invention is shown It is intended to.
Fig. 2 is the partial enlarged view of A in Fig. 1.
Fig. 3 is that the signal transmission of processor in pH value of slurry of desulfuration absorption tower and density online testing device of the invention is shown It is intended to.
In Fig. 1-Fig. 3: 1, absorption tower;2, surge tank;201, third delivery pipe;202, the second valve;3, density tank;4, Slurries delivery pipe;401, regulating valve;402, process water water inlet pipe;403, third valve;404, flowmeter;5, pH tester;6, Weighing component;7, processor;8, liquid-contacting part;9, top cover;10, inclined tube;11, connecting tube;1101, discharge outlet;1102, second row Put pipe;1103, the first valve;12, protective pot;13, delivery pump;14, the first delivery pipe;15, hose;16, display screen.
Specific embodiment
Embodiment 1
With reference to Fig. 1-Fig. 3, pH value of slurry of desulfuration absorption tower of the invention and density online testing device, comprising: absorption tower 1, surge tank 2, density tank 3 and processor 7;The serum outlet on absorption tower 1 is starched by the bottom of slurries delivery pipe 4 and surge tank 2 The top slurry outlet of the connection of liquid entrance, surge tank 2 is connected to by connecting tube 11 with the bottom slurry entrance of density tank 3, slurries Flowmeter 404 is provided in delivery pipe 4, slurries delivery pipe 4 is also connected with process water water inlet pipe 402.
The top of surge tank 2 is provided with pH tester 5, and the electrode of pH tester 5 is inserted into surge tank 2;Density tank 3 Multiple overflow ports are provided on side wall, and multiple overflow ports are arranged in same level, each overflow port is connected separately with tiltedly Pipe 10, the lower section of each inclined tube 10 are provided with liquid-contacting part 8, the lower port of inclined tube 10 towards liquid-contacting part 8 liquid feeding end, and it is more A liquid-contacting part 8 is interconnected;8 bottom of liquid-contacting part is provided with the first delivery pipe 14;The top of density tank 3 is provided with top cover 9, Top cover 9 is connected with weighing component 6 by suspending rod;The signal output end of pH tester 5 and the signal output end of weighing component 6 It is connect respectively with the pH value signal input part of processor 7 and weight signal input terminal, the signal output end of processor 7 is connected with Display screen 16.
In the embodiment above, the serum outlet on absorption tower 1 is entered by slurries delivery pipe 4 and the bottom slurry of surge tank 2 The top slurry outlet of mouth connection, surge tank 2 is connected to by connecting tube 11 with the bottom slurry entrance of density tank 3,2 He of surge tank Density tank 3 is arranged in series, and slurries is made to first pass through 2 pH value determination of surge tank, reduces the temperature difference of slurries in transmission process to suction Receive the influence of True pH Value measurement in tower 1;The design of slurries bottom in and top out in surge tank 2, the solid reduced in slurries are miscellaneous The wear to electrodes of confrontation pH tester 5 extends electrode life;Flowmeter 404 is provided in slurries delivery pipe 4, convenient for obtaining The flow of the slurries into surge tank 2 and density tank 3 is taken, and then controls the flow, guarantees measurement accuracy;Slurries delivery pipe 4 is also It is connected with process water water inlet pipe 402, which is passed through density tank 3 for demarcating to density tank 3, in addition, being convenient for dress Interior introducing process water is set to be rinsed device.
The top of surge tank 2 is provided with pH tester 5, and the electrode of pH tester 5 is inserted into surge tank 2, slow for testing Rush the pH value of slurries in tank 2.Multiple overflow ports are provided on the side wall of density tank 3, and multiple overflow ports are arranged in same level On face, each overflow port is connected separately with inclined tube 10, and the lower section of each inclined tube 10 is provided with liquid-contacting part 8, the lower end of inclined tube 10 Mouthful towards liquid-contacting part 8 liquid feeding end, and multiple liquid-contacting parts 8 be interconnected, 8 bottom of liquid-contacting part is provided with the first delivery pipe 14, so that the foam of slurry surface is taken tank body out of together when slurries are flowed out from 2 top exit of surge tank, avoids the intracorporal pH of tank Value and weight measurement are influenced by foam in slurries, improve measurement accuracy.The top of density tank 3 is provided with top cover 9, and top cover 9 is logical It crosses suspending rod and is connected with weighing component 6, be suspended to density tank 3 on weighing component 6, convenient for weighing density tank 3 and its inner pulp The weight of liquid, top cover 9 influence 3 weight of density tank by external air flow, improve density measurement accuracy.The signal of pH tester 5 The signal output end of output end and weighing component 6 connects with the pH value signal input part of processor 7 and weight signal input terminal respectively It connects, the signal output end of processor 7 is connected with display screen 16.For pH value and weight to be transferred to processor 7, and by slurries weight Magnitude is converted into serum density, and the pH value and density of slurries are shown eventually by display, convenient for operations staff to slurries desulfurization Quality is monitored online.
PH value of slurry of desulfuration absorption tower and density online testing device of the invention also has following additional embodiment:
With reference to Fig. 1 and Fig. 2, according to one embodiment of present invention, the periphery of density tank 3 is provided with protective pot 12, protection The bottom of tank 12 offers circular hole, and the inner wall of circular hole is connected to by hose 15 with the injection point of the bottom of density tank 3;Buffering The top slurry outlet of tank 2 is connected to by connecting tube 11 with hose 15.
In the embodiment above, the periphery of density tank 3 is provided with protective pot 12, and the bottom of protective pot 12 offers circular hole, The inner wall of circular hole is connected to by hose 15 with the injection point of the bottom of density tank 3, and the top slurry outlet of surge tank 2 passes through company Adapter tube 11 is connected to hose 15.Make to form buffer area between density tank 3 and connecting tube 11, and then reduces connecting tube 11 to density The influence of 3 weight test accuracy of tank.
With reference to Fig. 1, according to one embodiment of present invention, the lowest point of connecting tube 11 is provided at right-angle turning, right angle Corner is provided with discharge outlet 1101, and discharge outlet 1101 is connected with the second delivery pipe 1102, is provided on the second delivery pipe 1102 First valve 1103.
In the embodiment above, the lowest point of connecting tube 11 is provided at right-angle turning, and discharge is provided at right-angle turning Mouth 1101, discharge outlet 1101 is connected with the second delivery pipe 1102, and the first valve 1103 is provided on the second delivery pipe 1102.Make to starch Accumulation of impurities in liquid is discharged at right-angle turning, and through discharge outlet 1101, avoids 3 bottom slurry blocked inlet of density tank. In addition, the process water in density tank 3 is easily discharged after making 3 volume calibration of density tank, convenient for making slurries and process water by second Delivery pipe 1102 flows into trench, and with the emission circular treatment in trench and utilizes.
With reference to Fig. 1, according to one embodiment of present invention, the bottom of surge tank 2 is provided with third delivery pipe 201, third The second valve 202 is provided on delivery pipe 201.
In the embodiment above, the bottom of surge tank 2 is provided with third delivery pipe 201, is arranged on third delivery pipe 201 There is the second valve 202, convenient for the deposit inside dredging surge tank 2, surge tank 2 is cleaned.
With reference to Fig. 1, according to one embodiment of present invention, delivery pump 13, delivery pump 13 are provided in slurries delivery pipe 4 Regulating valve 401 is provided between the injection point of surge tank 2.
In the embodiment above, it is provided with delivery pump 13 in slurries delivery pipe 4, slurries is enable smoothly to introduce surge tank 2 In, it is provided with regulating valve 401 between 2 injection point of delivery pump 13 and surge tank, enters surge tank 2 and density tank 3 for slowing down Slurries flow velocity, reduce slurries in larger impurity washing away and wearing to 5 electrode of pH tester, meanwhile, slow slurries The measurement accuracy of density tank 3 can be improved in flow velocity.
With reference to Fig. 1, according to one embodiment of present invention, multiple grooves, density tank 3 are provided on the inner sidewall of top cover 9 Inner sidewall on be provided with multiple boss, groove can with boss is fixed is clamped.
In the embodiment above, it is provided with multiple grooves on the inner sidewall of top cover 9, is provided on the inner sidewall of density tank 3 Multiple boss, groove can be with the fixed clampings of boss.Density tank 3 is set to be suspended to 6 lower section of weighing component by top cover 9, convenient for weighing 3 weight of density tank.
With reference to Fig. 1, according to one embodiment of present invention, pH tester 5 is two.
In the embodiment above, pH tester 5 is two, and when damaging a pH tester 5, another can also continue to survey Amount, in addition, two pH testers 5 measure simultaneously, the pH value of true slurry can be reflected by making measurement result more.
With reference to Fig. 1, according to one embodiment of present invention, third valve 403 is provided on process water water inlet pipe 402.
In the embodiment above, it is provided with third valve 403 on process water water inlet pipe 402, when being rinsed convenient for device, liquidated The flow velocity of wash water is controlled.
With reference to Fig. 1, according to one embodiment of present invention, liquid-contacting part 8 is infundibulate.
In the embodiment above, liquid-contacting part 8 is infundibulate, avoids spilling slurries from falling on outside liquid-contacting part 8, influences To the bare weight of tank body itself.
Embodiment 2
Step 1, density tank is demarcated: firstly, top cover and density tank are connected together, and being suspended to electronics by suspending rod Below scale, density tank own wt m is weighed by electronic scale0For 3.52kg;Then, open third valve, by process water into Water pipe is passed through process water into surge tank and density tank, after density tank overflow port has process water spilling, by weighing density tank With the gross weight m of process water1For 13.53kg, pass through formula V=(m1-m0)/ρWater, calculating density tank volume V is 10.01L.Most Afterwards, the first valve is opened, after the process water in density tank and surge tank is emptied by the discharge outlet at connecting tube right-angle turning, is closed Close the first valve.
Step 2, slurry pH value and density measurement: regulating valve is opened, slurries in absorption tower are passed through by buffering by delivery pump In tank and density tank, regulating valve is adjusted, flowmeter registration c is made1For 0.5L/min, flowed out to slurries in density tank from overflow port and After non-foam is overflowed, slurry pH value h is measured by pH tester1It is 5.95, slurries and density tank gross weight is weighed by electronic scale Amount m is 14.53kg, passes through formula ρ=(m-m0It is 1100Kg/m that)/V, which calculates serum density ρ,3
Embodiment 3
Step 1, density tank is demarcated: firstly, top cover and density tank are connected together, and being suspended to electronics by suspending rod Below scale, density tank own wt m is weighed by electronic scale0For 3.82kg;Then, open third valve, by process water into Water pipe is passed through process water into surge tank and density tank, after density tank overflow port has process water spilling, is weighed by electronic scale The gross weight m of density tank and process water1For 13.59 kg, pass through formula V=(m1-m0)/ρWater, calculating density tank volume V is 9.77L.Finally, opening the first valve, emptied in density tank and surge tank by the discharge outlet at the right-angle turning of connecting tube After process water, the first valve is closed.
Step 2, slurry pH value and density measurement: regulating valve is opened, slurries in absorption tower are passed through by buffering by delivery pump In tank and density tank, regulating valve is adjusted, flowmeter registration c is made1For 0.6L/min, flowed out to slurries in density tank from overflow port and After non-foam is overflowed, slurry pH value h is measured by pH tester1It is 6.08, slurries and density tank gross weight is weighed by electronic scale Amount m is 14.48kg, passes through formula ρ=(m-m0It is 1091Kg/m that)/V, which calculates serum density ρ,3
Embodiment 4
Step 1, density tank is demarcated: firstly, top cover and density tank are connected together, and being suspended to electronics by suspending rod Below scale, density tank own wt m is weighed by electronic scale0For 3.95kg;Then, open third valve, by process water into Water pipe is passed through process water into surge tank and density tank, after density tank overflow port has process water spilling, is weighed by electronic scale The gross weight m of density tank and process water1For 13.63 kg, pass through formula V=(m1-m0)/ρWater, calculating density tank volume V is 9.68L.Finally, opening the first valve, emptied in density tank and surge tank by the discharge outlet at the right-angle turning of connecting tube After process water, the first valve is closed.
Step 2, slurry pH value and density measurement: regulating valve is opened, slurries in absorption tower are passed through by buffering by delivery pump In tank and density tank, regulating valve is adjusted, flowmeter registration c is made1For 0.7L/min, flowed out to slurries in density tank from overflow port and After non-foam is overflowed, slurry pH value h is measured by pH tester1It is 6.0, slurries and density tank total weight is weighed by electronic scale M is 14.58kg, passes through formula ρ=(m-m0It is 1098Kg/m that)/V, which calculates serum density ρ,3
In embodiment 2, embodiment 3 and embodiment 4, when serum density ρ deviates 1080-1180Kg/m3When range, filled Set flushing.Specifically, regulating valve is closed, the first valve is opened, empties slurries in surge tank and density tank, closes the first valve, Third valve is opened, process water is passed through into surge tank and density tank by process water water inlet pipe, makes flowmeter registration c2For 1.8L/min opens the first valve and the second valve, to surge tank and density tank when overflow port inclined tube has the outflow of stable liquid It is rinsed, until display shows that density is 1000Kg/m3, pH value 7-8 closes the first valve and the second valve.Then Repeat the above steps 1 and step 2, continues to monitor desulfurization slurry pH value and density on-line.
When the test result of two pH testers differs by more than 0.2, pH tester is calibrated again.Surge tank and It can not can be thoroughly removed when equipment downtime overhauls by the fouling washed off in the tank body of density tank.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modification and variations of the invention belong to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (10)

1. a kind of pH value of slurry of desulfuration absorption tower and density online testing device characterized by comprising
Absorption tower (1), surge tank (2), density tank (3) and processor (7);The serum outlet of the absorption tower (1) passes through slurries Delivery pipe (4) is connected to the bottom slurry entrance of the surge tank (2), and the top slurry outlet of the surge tank (2) passes through company Adapter tube (11) is connected to the bottom slurry entrance of the density tank (3), is provided with flowmeter on the slurries delivery pipe (4) (404), the slurries delivery pipe (4) is also connected with process water water inlet pipe (402);
It is provided with pH tester (5) at the top of the surge tank (2), the electrode of the pH tester (5) is inserted into the surge tank (2) in;
Multiple overflow ports are provided on the side wall of the density tank (3), and multiple overflow ports are arranged in same level, Each overflow port is connected separately with inclined tube (10), is provided with liquid-contacting part (8) below each inclined tube (10), described The lower port of inclined tube (10) towards the liquid-contacting part (8) liquid feeding end, and multiple liquid-contacting parts (8) be interconnected;Institute It states liquid-contacting part (8) bottom and is provided with the first delivery pipe (14);Top cover (9), the top are provided at the top of the density tank (3) It covers (9) and weighing component (6) is connected with by suspending rod;
The signal output end of the signal output end of the pH tester (5) and the weighing component (6) respectively with the processor (7) pH value signal input part is connected with weight signal input terminal, and the signal output end of the processor (7) is connected with display screen (16)。
2. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described The periphery of density tank (3) is provided with protective pot (12), and the bottom of the protective pot (12) offers circular hole, the inner wall of the circular hole It is connected to by hose (15) with the injection point of the bottom of the density tank (3);The top slurry outlet of the surge tank (2) is logical Connecting tube (11) is crossed to be connected to the hose (15).
3. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described The lowest point of connecting tube (11) is provided at right-angle turning, and discharge outlet (1101), the discharge are provided at the right-angle turning Mouth (1101) is connected with the second delivery pipe (1102), is provided with the first valve (1103) on second delivery pipe (1102).
4. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described The bottom of surge tank (2) is provided with third delivery pipe (201), is provided with the second valve on the third delivery pipe (201) (202)。
5. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described It is provided in slurries delivery pipe (4) delivery pump (13), is set between the delivery pump (13) and the injection point of the surge tank (2) It is equipped with regulating valve (401).
6. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described It is provided with multiple grooves on the inner sidewall of top cover (9), is provided with multiple boss on the inner sidewall of the density tank (3), it is described recessed Slot can be with the fixed clamping of the boss.
7. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described PH tester (5) is two.
8. pH value of slurry of desulfuration absorption tower according to claim 1 and density online testing device, which is characterized in that described Liquid-contacting part (8) is infundibulate.
9. a kind of pH value of slurry of desulfuration absorption tower and density on-line testing method, which comprises the following steps:
Step 1, density tank is demarcated: firstly, top cover and density tank are connected together, and being suspended to weighing component by suspending rod Lower section is m by weighing component to weigh density tank own wt0;Then, by process water water inlet pipe to surge tank and density It is passed through process water in tank, after density tank overflow port has process water spilling, weighs density tank and process water by weighing component Total weight is m1, pass through formula V=(m1-m0)/ρWater, calculating density tank volume is V;Finally, at by right-angle turning Discharge outlet empties the process water in surge tank and density tank;
Step 2, slurries in absorption tower: being passed through in surge tank and density tank by slurry pH value and density measurement by delivery pump, is adjusted Regulating valve is saved, flowmeter registration c is made1, from overflow port outflow and after non-foam is overflowed, tested by pH after slurries in density tank It is h that instrument, which measures slurry pH value,1, slurries are weighed by weighing component and density tank total weight is m, pass through formula ρ=(m- m0It is ρ that serum density, which is calculated, in)/V.
10. pH value of slurry of desulfuration absorption tower according to claim 9 and density on-line testing method, which is characterized in that institute State c1For 0.5-0.7L/min.
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