CN114034643B - Sulfate radical on-line analysis device - Google Patents
Sulfate radical on-line analysis device Download PDFInfo
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- CN114034643B CN114034643B CN202111439014.XA CN202111439014A CN114034643B CN 114034643 B CN114034643 B CN 114034643B CN 202111439014 A CN202111439014 A CN 202111439014A CN 114034643 B CN114034643 B CN 114034643B
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- 238000004458 analytical method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 239000007788 liquid Substances 0.000 claims abstract description 133
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 69
- 239000002699 waste material Substances 0.000 claims abstract description 49
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 61
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 6
- 230000002572 peristaltic effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004448 titration Methods 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/152—Scraping; Brushing; Moving band
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/154—Ultrasonic cleaning
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a sulfate radical on-line analysis device, which comprises a main case, wherein an analyzer system and an electric control system are arranged in the main case, the analysis system comprises a sulfate radical detector, a sulfate radical reactor, a feed pump, a discharge pump, a reagent dripping pump, a pure water pump, a plunger pump device and a reagent switching device, the reagent switching device is provided with a water inlet, a feed port, a liquid outlet and a waste liquid port, the plunger pump device comprises a vertically arranged piston cylinder and a piston rod which moves up and down in the piston cylinder, the lower end of the piston rod is provided with a piston head which is in sealing fit with the inner wall of the piston cylinder, the piston cylinder is a transparent cylinder with a liquid inlet and a liquid outlet at the lower end, the piston cylinder is fixed on the main case, the sulfate radical detector is in fit with the outer wall of the piston cylinder, a first three-way valve is connected to the liquid inlet and the liquid outlet of the piston cylinder, and two ports of the first three-way valve are respectively provided with a reaction liquid inlet and a reaction liquid outlet and a pure water inlet.
Description
Technical Field
The invention relates to an online sulfate radical analysis device, and belongs to the technical field of chemical detection equipment.
Background
In the chemical industry, it is often required to detect the content of sulfate ions in brine, a reaction cup and a detector of sulfate detection equipment in the prior art are integrated, barium sulfate is generated after a barium chloride reagent reacts with sulfate in brine in the reaction cup, and the turbidity of the reacted liquid containing barium sulfate is detected by using the detector. The barium sulfate generated after the reaction is attached to the wall of the reaction cup, so that the detection cup is not easy to clean after long-term use, the detector is a photometric detector, and the light transmittance of the reaction cup which is not cleaned thoroughly is reduced, thereby influencing the accuracy of the test result.
Disclosure of Invention
The invention aims to provide an online sulfate radical analysis device with accurate detection results and no influence of transmittance of a detection cup, which is used for solving the technical problem of inaccurate detection results caused by incomplete cleaning of the detection cup in the prior art.
The invention adopts the following technical scheme: the utility model provides an online analytical equipment of sulfate radical, including the mainframe box, be provided with analysis appearance system and electrical system in the mainframe box, analysis system includes sulfate radical detector, sulfate radical reactor, feed pump, discharge pump, reagent dropwise add pump, pure water pump, the sulfate radical reactor includes reaction cup and bowl cover, be equipped with feed port, discharge port, reagent dropwise add interface and waste liquid discharge port on the bowl cover, the import of pure water pump is connected with the intake manifold, still be equipped with plunger pump device, reagent auto-change over device in the mainframe box, reagent auto-change over device is equipped with water inlet, feed port, liquid outlet and waste liquid mouth, plunger pump device includes the piston cylinder of vertical setting and the piston rod that reciprocates in the piston cylinder, piston rod lower extreme has the piston head of sealing laminating with piston cylinder inner wall, the piston cylinder is the lower extreme is equipped with the transparent cylinder of feed and drain mouth, the piston cylinder is fixed on the mainframe box, the sulfate radical detector is laminated with piston cylinder outer wall and is set up, be connected with first three-way valve on the feed and drain mouth of piston cylinder, one port and piston cylinder intercommunication, two ports are respectively reaction liquid import and pure water import, two inlet branch pipes and one water intake branch pipe and another three-way valve intercommunication; in the sulfate radical reactor, a liquid outlet of the feeding interface and the reagent switching device, a liquid discharge interface and a reaction liquid inlet and outlet of the first three-way valve, a reagent dripping interface and an outlet of the reagent dripping pump, and a waste liquid discharge interface and an inlet of the discharge pump are respectively communicated through pipelines; in the reagent switching device, the water inlet is communicated with the outlet of the pure water pump, and the feed inlet is communicated with the outlet of the feed pump through pipelines respectively.
Still be equipped with feeding pure water auto-change over device in the mainframe box, feeding pure water auto-change over device includes switch valve seat and switching solenoid valve, is equipped with inlet end, feed end, discharge end and waste liquid end on the switching solenoid valve, and the feed end is connected with the liquid pipeline that awaits measuring, and the discharge end is connected with the inlet connection of discharge pump, and the inlet end is connected with pure water house steward.
The main machine box is internally provided with a waste liquid temporary storage tank, and a waste liquid port of the reagent switching device, an outlet of the discharge pump and a waste liquid end of the switching electromagnetic valve are all led into the waste liquid temporary storage tank through waste liquid pipelines.
A second three-way valve is arranged between the two water inlet branch pipes and the water inlet main pipe; the water inlet branch pipe communicated with the pure water inlet of the first three-way valve is provided with a third three-way valve, a first port of the third three-way valve is communicated with the pure water inlet, a second port of the third three-way valve is communicated with the pure water inlet of the first three-way valve, and the third port of the third three-way valve is connected with the water inlet end of the switching electromagnetic valve.
The sulfate radical reactor comprises an ultrasonic cleaning device, and the ultrasonic cleaning device comprises an ultrasonic generator positioned outside the reaction cup and an ultrasonic oscillator positioned inside the reaction cup.
The reagent switching device comprises a valve seat, a valve core rotatably and hermetically arranged in the valve seat and a motor for driving the valve core to rotate, wherein a connecting shaft is connected between the valve core and the motor, a water inlet, a feed inlet, a liquid outlet and a liquid outlet are uniformly formed in the circumferential direction of the valve seat, fluid channels with two open ends are arranged in the valve core, when pure water enters the valve core, the valve core rotates, and two ends of the fluid channels are respectively communicated with the water inlet and the liquid outlet; when the liquid to be measured enters the valve core, the valve core rotates, and two ends of the fluid channel are respectively communicated with the feed inlet and the waste liquid port.
And a code disc encoder is arranged between the connecting shaft and the motor.
The motor fixing plate is arranged in the main case, the motor is fixedly arranged on one side of the motor fixing plate, the valve seat fixing frame is arranged on the other side of the motor fixing plate, the code wheel encoder is positioned between the valve seat fixing frame and the motor mounting plate, the valve seat is fixed on the valve seat fixing frame, and the control circuit board is fixed on the motor fixing plate.
The pure water pump is provided with a pressure reducing structure; the pure water pump, the reagent dropwise adding pump, the feeding pump and the discharging pump are peristaltic pumps.
The display screen is arranged on the main case, and the electric control system comprises a power supply, a PLC (programmable logic controller), a control electric plate and a wiring electric plate which are arranged in the main case.
The beneficial effects of the invention are as follows: the detection process of the invention is as follows: firstly, the plunger pump device operates, a piston rod moves upwards, pure water enters a piston cylinder from a pure water inlet of a first three-way valve, a sulfate radical detector operates, and the turbidity value of the pure water in the plunger pump device is recorded; after pure water detection, the piston rod moves downwards, and pure water in the piston cylinder is discharged; the feeding pump operates to suck the liquid to be detected into the reagent switching device and then into the reaction cup; then a reagent dripping pump is operated, and the reagent is added into a reaction cup of the sulfate radical reactor to react with the measured liquid; then the piston rod of the plunger pump device moves upwards, the reaction liquid in the reaction cup is sucked into the piston cylinder, the sulfate radical detector operates, and the turbidity value of the reaction liquid in the piston cylinder is recorded; and calculating the difference between the two values obtained by the sulfate radical detector, and carrying the difference into a formula to obtain the sulfate radical content of the measured liquid. When the plunger pump device discharges the reaction liquid, the piston rod moves downwards, the piston head scrapes off sediment attached to the inner wall of the piston cylinder, and after the reaction liquid in the piston cylinder is discharged into the reaction cup, the liquid in the reaction cup is sucked out by the discharge pump, and the operation is finished.
According to the invention, the reaction cup and the sulfate radical detector are separated, the sulfate radical detector is arranged outside the piston cylinder of the plunger pump device, water and reaction liquid are sucked by the plunger pump device, the sulfate radical detector detects the turbidity of the liquid in the piston cylinder of the plunger pump device, and when the plunger pump discharges liquid and washes, the piston head at the end part of the piston rod is in sealing fit with the inner wall of the piston cylinder, so that the sediment adhered to the piston cylinder can be scraped when the piston head moves downwards, the piston cylinder of the plunger pump can be thoroughly washed, the transmittance of the piston cylinder can not be reduced, and the accuracy of a detection result is improved.
Preferably, the pure water feeding switching device is used for switching the feeding of the liquid to be detected and the pure water, when the liquid to be detected enters the reaction cup, the liquid to be detected enters the feeding port of the reagent switching device from the discharging end through the feeding pump under the action of the feeding pump and then enters the reaction cup; when the pipeline is cleaned, pure water enters from the water inlet end of the feeding pure water switching device, the feeding pump is opened to suck the pure water into the feeding port of the reagent switching device, and then the pure water is discharged into the reaction cup of the sulfate radical reactor and is discharged through the waste liquid discharge interface.
Preferably, the waste liquid temporary storage tank can temporarily store the waste liquid for testing and cleaning, the waste liquid is not required to be discharged outwards for each test, and the waste liquid is uniformly discharged to the outside after a certain amount of waste liquid is collected by the waste liquid temporary storage tank.
Preferably, the reaction cup is cleaned by ultrasonic wave, and the ultrasonic wave oscillator can vibrate the liquid in the reaction cup, so that the sediment attached to the wall of the reaction cup is cleaned, and the reaction cup is cleaned more thoroughly.
Preferably, the reagent switching device is a four-way valve, the feeding pump works to enable the liquid to be detected to enter a fluid channel in the valve core during feeding, and when the feeding pump stops, a section of liquid to be detected is reserved in the valve core, the four-way valve plays a role in quantifying the liquid to be detected due to higher concentration of the liquid to be detected, the valve core rotates, pure water is introduced into a pure water inlet of the reagent switching device, the pure water also enters the reaction cup while the liquid to be detected enters the reaction cup, and the liquid to be detected is diluted, so that the detection result is more accurate.
Preferably, the encoder positions the rotation of the valve core, ensures the precision of each rotation, and ensures normal liquid feeding and discharging.
Drawings
FIG. 1 is a schematic diagram of an internal analyzer system of an online sulfate analysis device of the present invention;
FIG. 2 is a schematic diagram of the internal electronic control system of the sulfate online analysis device of FIG. 1;
FIG. 3 is a schematic block diagram of a fluid circuit system of the analyzer system of FIG. 1;
FIG. 4 is an enlarged view of the sulfate detector and plunger pump device of FIG. 1;
FIG. 5 is a schematic diagram of the reagent switching apparatus of FIG. 1;
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is a schematic illustration of the reagent switching device of FIG. 5 in a feed state;
FIG. 8 is a schematic view of the reagent switching device of FIG. 5 in a water inlet state.
In the figure: 1-mainframe box, 2-sulfate reactor, 201-feeding interface, 202-discharging interface, 203-reagent drop interface, 204-waste liquid discharging interface, 3-feeding pump, 4-discharging pump, 5-reagent drop pump, 6-pure water pump, 7-sulfate detector, 8-plunger pump device, 810-plunger cylinder, 820-piston rod, 830-first three-way valve, 831-reaction liquid inlet and outlet, 832-pure water inlet, 9-reagent switching device, 910-valve seat, 911-water inlet, 912-feeding port, 913-liquid outlet, 914-waste liquid port, 920-valve core, 930-motor, 940-connecting shaft, 950-motor fixing plate, 960-valve seat fixing frame, 970-code disc encoder, 980-control electric plate, 10-feeding pure water switching device, 101-water inlet end, 102-discharging end, 103-waste liquid end, 11-second three-way valve, 12-third three-way valve, 13-waste liquid temporary storage tank, 14-power supply, 15-PLC controller, 16-control electric plate, 17-connection electric plate, 18-display screen, 19-USB interface.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1 to 8, the sulfate online analysis device according to an embodiment of the invention comprises a main case 1, wherein an analyzer system and an electric control system are arranged in the main case 1, the analysis system comprises a sulfate detector 7, a sulfate reactor 2, a feed pump 3, a discharge pump 4, a reagent drop pump 5 and a pure water pump 6, the sulfate reactor 2 comprises a reaction cup and a cup cover, a feed interface 201, a discharge interface 202, a reagent drop interface 203 and a waste liquid discharge interface 204 are arranged on the cup cover, and an evacuation interface for discharging air in the reaction cup is also arranged on the cup cover. The inlet of the pure water pump 6 is connected with a water inlet main pipe, a plunger pump device 8 and a reagent switching device 9 are also arranged in the main case 1, and the reagent switching device 9 is provided with a water inlet 911, a feed inlet 912, a liquid outlet 913 and a liquid outlet 914.
As shown in fig. 4, the plunger pump device 8 includes a vertically disposed piston cylinder 810 and a piston rod 820 moving up and down in the piston cylinder 810, a piston head sealing and attaching to the inner wall of the piston cylinder 810 is provided at the lower end of the piston rod 820, the piston cylinder 810 is a transparent cylinder with a liquid inlet and outlet port at the lower end, the piston cylinder 810 is fixed on the main casing 1, the sulfate detector 7 is attached to the outer wall of the piston cylinder 810, a first three-way valve 830 is connected to the liquid inlet and outlet port of the piston cylinder 810, one port of the first three-way valve 830 is communicated with the piston cylinder 810, the other two ports are a reaction liquid inlet 831 and a pure water inlet 832, two water inlet branch pipes are connected in parallel to the water inlet main pipe, one water inlet branch pipe is communicated with the inlet port of the pure water pump, and the other water inlet branch pipe is communicated with the pure water inlet port of the first three-way valve 830; in the sulfate reactor 2, the feeding interface 201 is communicated with the liquid outlet 913 of the reagent switching device 9, the discharging interface 202 is communicated with the reaction liquid inlet 831 of the first three-way valve 830, the reagent dripping interface 203 is communicated with the outlet of the reagent dripping pump 5, and the waste liquid discharging interface 204 is communicated with the inlet of the discharging pump 4 through pipelines; in the reagent switching apparatus 9, the water inlet 911 is connected to the outlet of the pure water pump 6, and the feed port 912 is connected to the outlet of the feed pump 4 via pipes.
Still be equipped with feeding pure water auto-change over device 10 in mainframe 1, feeding pure water auto-change over device 10 includes switching disk seat and switching solenoid valve, is equipped with inlet end 101, feed end (the feed end is used for inhaling external measured liquid, not shown in the drawing), discharge end 102 and waste liquid end 103 on the switching solenoid valve, and the feed end is connected with the liquid pipeline that awaits measuring, and discharge end 102 is connected with the inlet connection of discharge pump 4, and inlet end 101 is connected with pure water house steward. The main case 1 is also internally provided with a waste liquid temporary storage tank 13, and a waste liquid port 914 of the reagent switching device 9, an outlet of the discharge pump 4 and a waste liquid end 103 of the switching electromagnetic valve are all led into the waste liquid temporary storage tank 13 through waste liquid pipelines.
A second three-way valve 11 is arranged between the two water inlet branch pipes and the water inlet main pipe; a third three-way valve 12 is arranged on the water inlet branch pipe communicated with the pure water inlet of the first three-way valve 830, a first port of the third three-way valve 12 is communicated with the pure water inlet, a second port of the third three-way valve 12 is communicated with the pure water inlet of the first three-way valve 830, and a third port of the third three-way valve is connected with the water inlet end 101 of the switching electromagnetic valve.
The sulfate reactor 2 comprises an ultrasonic cleaning device, and the ultrasonic cleaning device comprises an ultrasonic generator positioned outside the reaction cup and an ultrasonic oscillator positioned inside the reaction cup.
As shown in fig. 5-8, the reagent switching device 9 includes a valve seat 910, a valve core 920 rotatably mounted in the valve seat in a sealing manner, and a motor 930 for driving the valve core to rotate, wherein a connecting shaft 940 is connected between the valve core 920 and the motor 930, the water inlet 911, the feed inlet 912, the liquid outlet 913 and the liquid outlet 914 are uniformly arranged on the circumference of the valve seat 910, a fluid channel with two open ends is arranged in the valve core 920, as shown in fig. 7, when pure water enters the valve core 920, the valve core 920 rotates, and two ends of the fluid channel are respectively communicated with the water inlet 911 and the liquid outlet 913; as shown in fig. 8, when the liquid to be measured enters the valve element 920, the valve element 920 rotates, and both ends of the fluid channel are respectively communicated with the inlet 912 and the outlet 914.
A code disc encoder 970 is arranged between the connecting shaft 940 and the motor 930, a motor fixing plate 950 is arranged in the main case 1, the motor 930 is fixedly arranged on one side of the motor fixing plate 950, a valve seat fixing frame 960 is arranged on the other side of the motor fixing plate 950, the code disc encoder 970 is positioned between the valve seat fixing frame 960 and the motor mounting plate 950, the valve seat 910 is fixed on the valve seat fixing frame 960, and a control circuit board 980 is fixed on the motor fixing plate 950.
The pure water pump 6 is provided with a decompression structure, and the pure water pump 6, the reagent dropwise adding pump 5, the feeding pump 3 and the discharging pump 4 are peristaltic pumps. The main case 1 is provided with a display screen 18 and a USB interface 19, and the electric control system comprises a power supply 14, a PLC controller 15, a control electric plate 16 and a wiring electric plate 17 which are positioned in the main case 1.
The liquid path control system of the sulfate radical on-line analysis device in this embodiment is shown in fig. 3, and the operation flow is as follows:
(1) Cleaning a plunger pump: the plunger pump device operates, the piston rod moves upwards, pure water enters the piston cylinder from the pure water inlet of the first three-way valve, the piston rod moves downwards, the pure water is discharged into the sulfate reactor from the reaction liquid outlet of the first three-way valve, and the pure water is discharged through the waste liquid discharge interface;
(2) Cleaning a pipeline: pure water enters from the water inlet end of the feeding pure water switching device, the feeding pump is opened to suck the pure water into the reagent switching device, and then the pure water is discharged into the sulfate radical reactor and is discharged through the waste liquid discharge interface;
(3) Adding water into the reaction cup: the pure water pump operates to suck pure water into the reagent switching device and then discharge the pure water into a reaction cup of the sulfate reactor;
(4) Detecting the value of pure water: the plunger pump device operates, a piston rod moves upwards, pure water enters the piston cylinder from a pure water inlet of the first three-way valve, the sulfate radical detector operates and records the pure water value in the plunger pump device, the sulfate radical detector is a luminosity detector, and the turbidity value is recorded; after detection, the plunger pump device operates, the piston rod moves downwards, and pure water in the piston cylinder is discharged into a reaction cup of the sulfate radical reactor;
(5) Cleaning the reaction cup: the stirring device and the ultrasonic oscillator of the sulfate radical reactor operate to clean the reaction cup, a liquid discharge pump is opened after cleaning, and waste liquid is sucked out and discharged through a waste liquid discharge interface;
(6) The reaction cup sucks the liquid to be tested: the feeding pump operates, the liquid to be tested is sucked into the fluid channel of the valve core of the reagent switching device by the feeding pure water switching device, the valve core of the reagent switching device is in the state in fig. 7 when the liquid to be tested is sucked, then the valve core of the reagent switching device rotates to be in the state in fig. 8, the pure water pump is opened to suck pure water into the reagent switching device, the liquid to be tested in the valve core of the reagent switching device is discharged into the reaction cup while the pure water is sucked, the liquid to be tested is diluted by the pure water, and the reagent switching device is closed;
(7) Dropwise adding a test agent: the reagent dripping pump operates, and the reagent is added into a reaction cup of the sulfate radical reactor to react with the detected liquid;
(9) The plunger pump device sucks the reaction liquid: the reaction liquid inlet and outlet of the first three-way valve are opened, the piston rod moves upwards, and the reaction liquid in the reaction cup is sucked into the piston cylinder;
(10) The sulfate radical detector operates and records the turbidity value of the reaction liquid in the piston cylinder; calculating the difference value of the two values obtained by the sulfate radical detector, and carrying the difference value into a formula to obtain the sulfate radical content of the detected liquid;
(11) The reaction solution was discharged: the piston rod moves downwards, the reaction liquid in the piston cylinder is discharged into the reaction cup, the discharge pump operates, the discharge pump sucks the liquid in the reaction cup into the waste liquid temporary storage tank, and the operation is finished.
According to the sulfate online analysis device, the reaction cup and the sulfate detector are separated, the sulfate detector is arranged outside the piston cylinder of the plunger pump device, water and reaction liquid are sucked by the plunger pump device, the sulfate detector detects the turbidity of the liquid in the piston cylinder of the plunger pump device, when the plunger pump is cleaned, the piston head at the end part of the piston rod is in sealing fit with the inner wall of the piston cylinder, and when the piston head moves downwards, precipitation which is prevented from adhering to the piston cylinder can be scraped off, so that the piston cylinder of the plunger pump is thoroughly cleaned, the transmittance of the piston cylinder is not reduced, and the accuracy of a detection result is improved; the up-and-down movement of the piston rod can be driven by a motor or a screw lifting mechanism or a hydraulic push rod and other driving devices. In addition, the reaction cup is cleaned by the ultrasonic generator, and the ultrasonic generator can vibrate the liquid in the reaction cup, so that the sediment attached to the wall of the reaction cup can be cleaned, and the reaction cup can be cleaned more thoroughly.
The reagent auto-change over device of this embodiment is a kind of cross valve in fact, and the charge pump work makes the liquid that is surveyed get into in the fluid channel in the case when feeding, and when the charge pump stopped, the case is inside to be left one section liquid that is surveyed, because the liquid concentration that is surveyed is higher, and the cross valve plays the effect to the liquid ration that is surveyed, and the case is rotatory, and when the liquid that is surveyed got into the reaction cup, pure water also got into the reaction cup, dilutes the liquid that is surveyed for the testing result is more accurate.
The sulfate radical on-line analysis device of the embodiment has the following characteristics: (1) The photometric analyzer of the sulfate radical detector adopts a specific wavelength LED cold light source, so that the service life is very long and the sensitivity is high; the detection time is fast, the result is accurate, and the precision can reach ppm and ppb level; (2) The optimized pretreatment system is customized according to different use conditions of the end user, and can adapt to different working conditions; (3) The sample range of the analyzer is customized according to the actual production requirements of customers, so that the actual production requirements of customers can be completely met; (4) The intelligent detection is completely realized, the full-automatic operation is realized, and the intelligent functions of automatic sampling, automatic detection, automatic cleaning, automatic discharging, automatic analysis, automatic alarming and the like can be realized; the analyzer can automatically adjust the sampling quantity, the analysis frequency, the titration step length and the like through the analysis result under certain special working conditions so as to meet the special requirements in the production process; (5) The sampling analysis interval period can be set independently for 0-999 minutes, and the typical analysis time is 5-10 minutes; the DCS can also be set to remotely start and stop the instrument according to the requirements; (6) Each measuring result is output through one or more paths of 4-20 mA analog signals and is used for being connected with a control system such as a recorder or a DCS; (7) According to the environmental requirements, an explosion-proof or non-explosion-proof analysis cabin can be selected, and a matched sample pretreatment system, a pure water decompression system, a positive pressure protection system and the like are greatly simplified and are convenient for a customer to install and use.
For the same liquid to be detected, the accuracy deviation of the sulfate radical analyzer of the embodiment is +/-2%, and the manual detection deviation is +/-5%. The sulfate radical analyzer can continuously and uninterruptedly detect, and has higher detection efficiency than manual detection, more accurate detection result and great time and cost saving.
The components and the pipelines which are in contact with the liquid are made of PFA and tetrafluoro, and the box body is made of SMC composite materials, so that the sulfate radical analyzer is firm and durable, flame-retardant, waterproof and corrosion-resistant, and therefore, the sulfate radical analyzer has better corrosion-resistant effect.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (6)
1. An online sulfate radical analysis method, wherein an analysis device adopted by the analysis method comprises the following steps: the main machine case is provided with analysis appearance system and electrical system in the main machine case, and analysis system includes sulfate radical detector, sulfate radical reactor, charge pump, discharge pump, reagent dropwise add pump, pure water pump, and the sulfate radical reactor includes reaction cup and bowl cover, is equipped with charge-in interface, discharge interface, reagent dropwise add interface and waste liquid emission interface on the bowl cover, and the access connection of pure water pump has a water inlet header pipe, its characterized in that: the main case is internally provided with a plunger pump device and a reagent switching device, the reagent switching device is provided with a water inlet, a feed inlet, a liquid outlet and a liquid outlet, the plunger pump device comprises a vertically arranged piston cylinder and a piston rod which moves up and down in the piston cylinder, the lower end of the piston rod is provided with a piston head which is in sealing fit with the inner wall of the piston cylinder, the piston cylinder is a transparent cylinder with a liquid inlet and a liquid outlet at the lower end, the piston cylinder is fixed on the main case, the sulfate radical detector is in fit with the outer wall of the piston cylinder, the liquid inlet and the liquid outlet of the piston cylinder are connected with a first three-way valve, one port of the first three-way valve is communicated with the piston cylinder, the other two ports are respectively a reaction liquid inlet and a pure water inlet, two water inlet branch pipes are connected on a water inlet main pipe in parallel, one water inlet branch pipe is communicated with the inlet of the pure water pump, and the other water inlet branch pipe is communicated with the pure water inlet of the first three-way valve; in the sulfate radical reactor, a liquid outlet of the feeding interface and the reagent switching device, a liquid discharge interface and a reaction liquid inlet and outlet of the first three-way valve, a reagent dripping interface and an outlet of the reagent dripping pump, and a waste liquid discharge interface and an inlet of the discharge pump are respectively communicated through pipelines; in the reagent switching device, a water inlet is communicated with an outlet of the pure water pump, and a feed inlet is communicated with an outlet of the feed pump through pipelines respectively;
the main machine box is internally provided with a feeding pure water switching device which comprises a switching valve seat and a switching electromagnetic valve, wherein the switching electromagnetic valve is provided with a water inlet end, a feeding end, a discharging end and a waste liquid end, the feeding end is connected with a liquid pipeline to be tested, the discharging end is connected with an inlet of a discharging pump, and the water inlet end is connected with a pure water main pipe;
the main machine box is internally provided with a waste liquid temporary storage tank, and a waste liquid port of the reagent switching device, an outlet of the discharge pump and a waste liquid end of the switching electromagnetic valve are all led into the waste liquid temporary storage tank through a waste liquid pipeline;
a second three-way valve is arranged between the two water inlet branch pipes and the water inlet main pipe; a third three-way valve is arranged on the water inlet branch pipe communicated with the pure water inlet of the first three-way valve, a first port of the third three-way valve is communicated with the pure water inlet, a second port of the third three-way valve is communicated with the pure water inlet of the first three-way valve, and the third port of the third three-way valve is connected with the water inlet end of the switching electromagnetic valve;
the sulfate radical reactor comprises an ultrasonic cleaning device, wherein the ultrasonic cleaning device comprises an ultrasonic generator positioned outside the reaction cup and an ultrasonic oscillator positioned inside the reaction cup;
the analysis method comprises the following specific steps:
(1) Cleaning a plunger pump: the plunger pump device operates, the piston rod moves upwards, pure water enters the piston cylinder from the pure water inlet of the first three-way valve, the piston rod moves downwards, the pure water is discharged into the sulfate reactor from the reaction liquid outlet of the first three-way valve, and the pure water is discharged through the waste liquid discharge interface;
(2) Cleaning a pipeline: pure water enters from the water inlet end of the feeding pure water switching device, the feeding pump is opened to suck the pure water into the reagent switching device, and then the pure water is discharged into the sulfate radical reactor and is discharged through the waste liquid discharge interface;
(3) Adding water into the reaction cup: the pure water pump operates to suck pure water into the reagent switching device and then discharge the pure water into a reaction cup of the sulfate reactor;
(4) Detecting the value of pure water: the plunger pump device operates, a piston rod moves upwards, pure water enters the piston cylinder from a pure water inlet of the first three-way valve, the sulfate radical detector operates and records the pure water value in the plunger pump device, the sulfate radical detector is a luminosity detector, and the turbidity value is recorded; after detection, the plunger pump device operates, the piston rod moves downwards, and pure water in the piston cylinder is discharged into a reaction cup of the sulfate radical reactor;
(5) Cleaning the reaction cup: the stirring device and the ultrasonic oscillator of the sulfate radical reactor operate to clean the reaction cup, a liquid discharge pump is opened after cleaning, and waste liquid is sucked out and discharged through a waste liquid discharge interface;
(6) The reaction cup sucks the liquid to be tested: the feeding pump operates to suck the measured liquid into the fluid channel of the valve core of the reagent switching device by the feeding pure water switching device, the pure water pump is opened to suck pure water into the reagent switching device, the measured liquid in the valve core of the reagent switching device is discharged into the reaction cup while the pure water is sucked, the measured liquid is diluted by the pure water, and the reagent switching device is closed;
(7) Dropwise adding a test agent: the reagent dripping pump operates, and the reagent is added into a reaction cup of the sulfate radical reactor to react with the detected liquid;
(9) The plunger pump device sucks the reaction liquid: the reaction liquid inlet and outlet of the first three-way valve are opened, the piston rod moves upwards, and the reaction liquid in the reaction cup is sucked into the piston cylinder;
(10) The sulfate radical detector operates and records the turbidity value of the reaction liquid in the piston cylinder; calculating the difference value of the two values obtained by the sulfate radical detector, and carrying the difference value into a formula to obtain the sulfate radical content of the detected liquid;
(11) The reaction solution was discharged: the piston rod moves downwards, the reaction liquid in the piston cylinder is discharged into the reaction cup, the discharge pump operates, the discharge pump sucks the liquid in the reaction cup into the waste liquid temporary storage tank, and the operation is finished.
2. The sulfate online analysis method according to claim 1, wherein: the reagent switching device comprises a valve seat, a valve core rotatably and hermetically arranged in the valve seat and a motor for driving the valve core to rotate, wherein a connecting shaft is connected between the valve core and the motor, a water inlet, a feed inlet, a liquid outlet and a liquid outlet are uniformly formed in the circumferential direction of the valve seat, fluid channels with two open ends are arranged in the valve core, when pure water enters the valve core, the valve core rotates, and two ends of the fluid channels are respectively communicated with the water inlet and the liquid outlet; when the liquid to be measured enters the valve core, the valve core rotates, and two ends of the fluid channel are respectively communicated with the feed inlet and the waste liquid port.
3. The sulfate online analysis method according to claim 2, wherein: and a code disc encoder is arranged between the connecting shaft and the motor.
4. A sulfate on-line analysis method according to claim 3, characterized in that: the motor fixing plate is arranged in the main case, the motor is fixedly arranged on one side of the motor fixing plate, the valve seat fixing frame is arranged on the other side of the motor fixing plate, the code wheel encoder is positioned between the valve seat fixing frame and the motor mounting plate, the valve seat is fixed on the valve seat fixing frame, and the control circuit board is fixed on the motor fixing plate.
5. The sulfate online analysis method according to claim 1, wherein: the pure water pump is provided with a pressure reducing structure; the pure water pump, the reagent dropwise adding pump, the feeding pump and the discharging pump are peristaltic pumps.
6. The sulfate online analysis method according to claim 1, wherein: the display screen is arranged on the main case, and the electric control system comprises a power supply, a PLC (programmable logic controller), a control electric plate and a wiring electric plate which are arranged in the main case.
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