CN111060157A - Miniature surface water environmental quality check out test set - Google Patents
Miniature surface water environmental quality check out test set Download PDFInfo
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- CN111060157A CN111060157A CN201911409635.6A CN201911409635A CN111060157A CN 111060157 A CN111060157 A CN 111060157A CN 201911409635 A CN201911409635 A CN 201911409635A CN 111060157 A CN111060157 A CN 111060157A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
- G01N2001/1427—Positive displacement, piston, peristaltic
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Abstract
The invention relates to the technical field of water quality detection, in particular to a miniature surface water environment quality detection device. The equipment comprises a case, and a pretreatment module, a water channel pipeline, a five-parameter acquisition module, a chemical single-parameter testing module, a central control transmission module and an industrial control display module which are arranged in the case. The advantage of this patent is be convenient for realize automatically cleaning and non-maintaining effect to further promote water measuring stability and accuracy, reach energy-concerving and environment-protective effect simultaneously.
Description
Technical Field
The invention relates to the technical field of water quality detection, in particular to a miniature surface water environment quality detection device.
Background
Water is a source of life, people can not leave water in life and production activities, and the quality of drinking water is closely related to the health of people. With the development of social economy, scientific progress and improvement of the living standard of people, the requirements of people on the water quality of drinking water are continuously improved, and the water quality standard of the drinking water is correspondingly continuously developed and improved. Because the formulation of the water quality standard of the drinking water is related to various factors such as living habits, cultures, economic conditions, scientific and technical development level, water resources and the current situation of the water quality of people, the requirements for the water quality are different between countries and different regions of the same country, and the water quality detection device is used for detecting the water quality condition.
At present, water quality measurement is carried out by introducing water into a tank body and measuring water quality through a probe on the tank body, but the following problems exist in the process of measuring water quality: various impurities often exist in the introduced water body, and the impurities influence the measurement of the probe in the water body conveying process, so that the accuracy of data is influenced in the measurement; (II) microorganisms in the water are continuously bred, so that a plurality of microorganisms are attached to the inside of the pipe and the probe, and the detection precision is influenced; and thirdly, due to the influence of impurities and microorganisms on the measurement, the tank body and the probe are required to be cleaned and maintained frequently or regularly, so that the maintenance cost is wasted, and the measurement efficiency is greatly reduced. (IV) the data acquired by the multiple parameters are inaccurate, and each parameter is not accurately tested; and (V) real-time monitoring cannot be continuously and stably carried out.
Disclosure of Invention
The invention aims to solve the problem of the existing water quality measurement, and provides a method for continuously, timely and accurately monitoring the water quality and the change condition of a target water area through user setting, and obtaining continuous online monitoring data for 24 hours; the pretreatment module is convenient for realizing better oil removal, sedimentation and filtration effects, and the five-parameter acquisition module is used for further accurately and stably measuring the five parameters in real time; the pipeline switching is convenient for collecting different liquids through the electromagnetic eight-way valve; the chemical single-parameter testing module is convenient for more accurately testing each parameter; the miniature surface water environment quality detection equipment is convenient to operate better through a circuit board, a display unit and an industrial personal computer.
For the purpose of the invention, the following technical scheme is adopted for realizing the purpose:
a kind of miniature surface water environmental quality detection equipment, this apparatus includes the chassis and preconditioning module, water channel pipeline, five parameter acquisition modules, chemical single parameter test module, central control transmission module and industrial control display module set up in the chassis; the pretreatment module one end pretreatment module connect the outside water inlet, the other end connects the waterway pipeline, the waterway pipeline connects the five-parameter acquisition module, the chemical single-parameter test module comprises a plurality of reagent bottles, a peristaltic pump, an electromagnetic eight-way valve, a permanganate index test module, an ammonia nitrogen test module, a total phosphorus test module, a total nitrogen test module and a chemical oxygen demand, the water outlet of the five-parameter acquisition module and each reagent bottle are connected to the electromagnetic eight-way valve, the water outlet of the electromagnetic eight-way valve is respectively connected to the chemical single-parameter test module, the chemical single-parameter test module selectively measures and sends data to the central control transmission module, the central control transmission module comprises a chemical single-parameter acquisition circuit board, a chemical single-parameter control circuit board, an electrode interface circuit board and a main control interface circuit board, the chemical single-parameter acquisition circuit board, the peristaltic pump and the electromagnetic eight-way valve are connected to the, the chemical single-parameter control circuit board is connected to the industrial control display module; the five-parameter acquisition module acquires real-time measurement of water temperature, pH, turbidity, conductivity and dissolved oxygen and sends data to the electrode interface circuit board, and the electrode interface circuit board is connected to the industrial control display module; the industrial control display module collects data to perform parallel sample testing, standard sample checking, water sample adding standard, zero drift and range drift testing on the chemical single-parameter testing module, and the measuring result is uploaded and displayed through the industrial control display module.
Preferably, the five-parameter acquisition module comprises a pH temperature sensor, a dissolved oxygen sensor, a turbidity sensor and a conductivity sensor. The five-parameter acquisition module only comprises some measurement modes, and the system can also comprise the measurement of other probe products and has the same function.
Preferably, the chemical single-parameter testing module adopts a potassium permanganate oxidation spectrophotometry, the ammonia nitrogen testing module adopts a salicylic acid spectrophotometry, the total phosphorus testing module adopts an ammonium molybdate spectrophotometry, the total nitrogen testing module adopts a potassium persulfate oxidation ultraviolet spectrophotometry, and the chemical oxygen demand adopts a potassium dichromate oxidation spectrophotometry. Can be adjusted according to the requirements of the measurement.
Preferably, the equipment further comprises a wastewater liquid level meter, a pure water liquid level meter, a gas blowing valve, an electric ball valve, a five-parameter acquisition module liquid level meter, a safety protection module and an ultrasonic Doppler flow meter, wherein the wastewater liquid level meter, the pure water liquid level meter, the gas blowing valve, the electric ball valve and the five-parameter acquisition module liquid level meter are all connected to the main control interface circuit board.
Preferably, the five-parameter acquisition module further comprises a tank body, a filtering assembly and a cleaning and blowing assembly; the tank body is obliquely arranged, the liquid outlet end of the tank body is higher than the liquid inlet end of the tank body, and impurities are precipitated at the liquid inlet end; the liquid inlet end of the tank body is provided with a water inlet interface, the liquid outlet end of the tank body is connected with an overflow interface, the upper part of the tank body is provided with four sensor interfaces, and the middle parts of the four sensor interfaces are provided with filtering interfaces; four air blowing interfaces are arranged at the lower part of the tank body corresponding to the lower parts of the four sensor interfaces; the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor are sequentially and respectively arranged at four sensor interfaces of the tank body from the feeding end to the discharging end, and respectively comprise a measuring probe limiting sleeve and a measuring probe column; the measuring and detecting column is arranged on the tank body through a measuring probe limiting sleeve, the measuring and detecting column is positioned in the middle of the measuring probe limiting sleeve, and the lower part of the measuring and detecting column is positioned in the tank body; a matching column sleeve is arranged on the tank body below the measuring and detecting column on the pH temperature sensor, and a matching concave surface is arranged on the matching column sleeve; the filtering component is arranged on the filtering interface of the tank body and is used for filtering impurities; the cleaning and blowing assembly comprises four cleaning and blowing joints; the four cleaning blowing joints are connected to blowing interfaces of the tank body, the cleaning blowing joints are matched with the measuring probe, and the matching column sleeves are connected to the blowing interfaces corresponding to the pH temperature sensors; the tank body is also provided with an algae removal assembly, the algae removal assembly is used for degerming and removing algae of liquid, and comprises two algae removal metal heads which are respectively connected to the left side and the right side of the front part of the tank body.
Preferably, the filtering component comprises a filtering seat, four sampling ports and a through interface, the filtering seat is connected to the filtering interface, a filtering screen is arranged at the bottom of the filtering seat, the four sampling ports and the through interface are circumferentially and regularly arranged at the top of the filtering seat, each sampling port is connected with a sampling joint, and the through interface is connected with a through joint.
Preferably, each cleaning and blowing joint comprises a blowing connector and a blowing head, the blowing head is arranged in the top of the blowing connector, and the top of the blowing head is positioned in the tank body; the four cleaning blowing joints are in one-to-one correspondence with the bottoms of the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor.
Preferably, a liquid level detection head is arranged on the front side of the liquid outlet end part of the device and is used for detecting the liquid level of the tank body.
Preferably, a through joint is arranged above the liquid outlet end part of the device, and the through joint is connected with the through interface through a pipeline.
According to the technical scheme, the central control system in the equipment controls the external water pump, measured raw water is managed and updated through the pretreatment module, the measured raw water is sent to the five-parameter measurement module to be measured, the chemical single-parameter test module extracts the raw water which is settled and filtered in the tank body into the reaction system to be measured, all control of the equipment is controlled by the central control transmission system, all measurement results are transmitted to the industrial control display module, and the measurement results are uploaded to the management system through the industrial control display module.
The water quality and the change condition of the target water area can be continuously, timely and accurately monitored through user setting, 24-hour continuous online monitoring data can be obtained, and further, the five-parameter acquisition module is obliquely arranged through the tank body, so that impurities can be conveniently deposited, and the measurement quality is improved; through the matching of the cleaning and blowing joint and the sensor, the probe is ensured to be self-cleaned under the action of air blowing without influencing measurement, and the maintenance and cleaning cost and time are saved; the algae removal component releases cations into the measurement water body under the condition of not influencing measurement, so that the breeding of microorganisms and algae is reduced; the device can realize the functions by using measurement water without excluding access to other clean water sources by ensuring the measurement requirements through the filtering component, the liquid level detection head and the through joint and further improving the measurement effect,
to sum up, the advantage of this patent is that the quality of water and the situation of change that realize continuous, timely, accurate monitoring target waters are set for through the user to can obtain 24 continuous on-line monitoring data of hour, further be convenient for realize automatically cleaning and non-maintaining effect, and further promote water measuring stability and accuracy, reach energy-concerving and environment-protective effect simultaneously.
Drawings
FIG. 1 is a system block diagram of a micro surface water environment quality detection device according to the present invention.
Fig. 2 is a schematic structural diagram of a five-parameter acquisition module.
FIG. 3 is a cross-sectional view of a five parameter acquisition module.
Fig. 4 is an exploded view of a five parameter acquisition module.
Fig. 5 is a schematic view of the structure of the filter assembly.
Detailed Description
The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a micro surface water environment quality detection device comprises a case, and a pretreatment module, a waterway pipeline, a five-parameter acquisition module, a chemical single-parameter testing module, a central control transmission module and an industrial control display module which are arranged in the case; the pretreatment module one end pretreatment module connect the outside water inlet, the other end connects the waterway pipeline, the waterway pipeline connects the five-parameter acquisition module, the chemical single-parameter test module comprises a plurality of reagent bottles, a peristaltic pump, an electromagnetic eight-way valve, a permanganate index test module, an ammonia nitrogen test module, a total phosphorus test module, a total nitrogen test module and a chemical oxygen demand, the water outlet of the five-parameter acquisition module and each reagent bottle are connected to the electromagnetic eight-way valve, the water outlet of the electromagnetic eight-way valve is respectively connected to the chemical single-parameter test module, the chemical single-parameter test module selectively measures and sends data to the central control transmission module, the central control transmission module comprises a chemical single-parameter acquisition circuit board, a chemical single-parameter control circuit board, an electrode interface circuit board and a main control interface circuit board, the chemical single-parameter acquisition circuit board, the peristaltic pump and the electromagnetic eight-way valve are connected to the, the chemical single-parameter control circuit board is connected to the industrial control display module; the five-parameter acquisition module acquires real-time measurement of water temperature, pH, turbidity, conductivity and dissolved oxygen and sends data to the electrode interface circuit board, and the electrode interface circuit board is connected to the industrial control display module; the industrial control display module collects data to perform parallel sample testing, standard sample checking, water sample adding standard, zero drift and range drift testing on the chemical single-parameter testing module, and the measuring result is uploaded and displayed through the industrial control display module.
Such as valve body blockage caused by solid-lifting particle deposition in the valve, management of liquid reagent residues, long-term non-operation equipment cleaning and the like. Only need to collude the valve passageway that needs the washing, click and carry out, the system is automatic to be extracted the pure water and is discharged into the pipeline of choosing, and the repeated operation reaches the washing purpose.
The chemical single-parameter testing module comprises a permanganate index testing module, an ammonia nitrogen testing module, a total phosphorus testing module, a total nitrogen testing module and chemical oxygen demand.
Chemical single parameter testing principle table:
| temperature of | Temperature sensor method |
| pH | Glass electrode method |
| Dissolved oxygen | Fluorescence method |
| Electrical conductivity of | Quadrupole electrode method |
| Turbidity of water | 90 degree scattering light method |
| Permanganate index | Potassium permanganate oxidation spectrophotometry |
| Ammonia nitrogen | Salicylic acid spectrophotometry |
| Total phosphorus | Ammonium molybdate spectrophotometry |
| Total nitrogen | Potassium persulfate oxidation ultraviolet spectrophotometry |
| Chemical Oxygen Demand (COD) | Potassium dichromate oxidation spectrophotometry |
Permanganate index: under an acidic condition, adding a quantitative potassium permanganate solution into a water sample, heating and digesting for a period of time, fully reacting reducing substances in the water sample with potassium permanganate, cooling and detecting the absorbance of the water sample, wherein the absorbance has a certain linear relation with the permanganate index in the water sample. The permanganate index content can be calculated by measuring the absorbance of the component to be measured.
Ammonia nitrogen: after a water sample to be detected is pretreated by using trisodium citrate as a masking agent under the conditions of pH of 11.7 and existence of sodium nitroprusside, ammonia and ammonium ions in the water sample react with salicylate and hypochlorite ions to generate a blue-green compound, and the absorbance of the blue-green compound is measured at the wavelength of 660 nm. The absorbance and the ammonia nitrogen concentration in the water sample have a certain linear relation. The content of ammonia nitrogen in the water sample can be indirectly obtained through the determination of the absorbance.
Total phosphorus: the method adopts an ammonium molybdate spectrophotometry, and has the detection principle that a certain amount of water sample is added with potassium persulfate for heating and digesting for a period of time, phosphorus contained in the water sample is converted into orthophosphate, a reducing agent and a color developing agent are added after cooling, the orthophosphate is reduced by ascorbic acid after reacting with ammonium molybdate and antimony potassium tartrate, a blue complex is generated, the absorbance is detected at a specific wavelength, and a certain linear relation exists between the absorbance and the phosphorus content in the water sample.
Total nitrogen: adding potassium persulfate into a certain amount of water sample at the temperature of 120 ℃ and 124 ℃, heating and digesting for a period of time, converting nitrogen-containing compounds in the water sample into nitrate nitrogen, cooling, adding dilute hydrochloric acid for adjusting the pH value of the reaction solution to be acidic, respectively measuring absorbances A220 and A275 at 220nm and 275nm by adopting an ultraviolet spectrophotometry, and calculating a corrected absorbance A according to the following formula, wherein the proportional relation A between the total nitrogen content and the corrected absorbance A is A220-2A 275.
Chemical oxygen demand: under an acidic condition, adding a quantitative potassium dichromate solution into a water sample, heating and digesting for a period of time, carrying out sufficient oxidation-reduction reaction on reducing substances in the water sample and potassium dichromate, reducing the potassium dichromate to generate trivalent chromium ions, cooling, and testing the absorbance of the trivalent chromium ions at a wavelength of 610nm, wherein the absorbance has a direct proportion relation with the trivalent chromium ions in the water sample.
Five-parameter technical parameter table:
the five parameter signal data of water temperature, pH, turbidity, conductivity, dissolved oxygen and the like are real-time data, and the state data are refreshed at intervals of 20s (not recorded). The display lamp of each status bar is red, namely, the display lamp indicates that the communication is normal, the IO output is normal or the IO input is normal. Wherein, the status light such as temperature, pH, turbidity, conductivity and dissolved oxygen shows the communication, preceding, back door magnetism, pure water liquid level 1, 2, waste water liquid level 1, 2, jar body liquid level are IO mouth input, and the light shows that the instrument appears unusually, and air conditioner, water pump, air pump, RTU, five parameters, fan 1, 2, ball valve 1, 2, air-blowing valve 1, 2, 3, 4 etc. all are IO mouth output, and the status light is bright shows that this interface 24V output is normal.
Calibration of the pH, generally 3 points (4.01 or 4.00, 6.86 or 7.00, 9.18 or 9.00) are recommended. After the calibration of the 3 points is finished, the calibrated 3 points are selected, a 'training' button is clicked to fit the newly calibrated KB, and the fitting goodness R2 is ensured to be more than 0.999 according to the fitting result. And setting the displayed decimal and effective number according to the prompt, checking automatic measurement and real-time recording of the probe, and recording parameters in real time.
Calibration of conductivity, 2 points (0, 1413. mu.S/cm) are generally recommended. After the 2 points are calibrated, the calibrated 2 points are selected, a 'training' button is clicked to fit the newly calibrated KB, and the conductivity standard solution is measured reversely after the calibration is finished, wherein the conductivity standard solution of 147-1413 muS/cm is generally measured reversely.
Calibration of turbidity generally suggests 2 points (pure water 0NTU, 200NTU), after the 2 points are calibrated, 2 points of calibration are selected, and a 'training' button is clicked to fit the newly calibrated KB. And (5) reversely measuring the turbidity solution of 20-100 NTU after the calibration is finished.
And (3) calibrating dissolved oxygen, namely calibrating the dissolved oxygen probe in the air generally, wherein the standard value is 8.11mg/L (room temperature environment), and performing click calibration and training.
The water temperature and the dissolved oxygen share one probe, and calibration is not needed.
The electrode interface circuit board is connected to the industrial control display module; the industrial control display module collects data to perform parallel sample testing, standard sample checking, water sample adding standard, zero drift and range drift testing on the chemical single-parameter testing module, and the measuring result is uploaded and displayed through the industrial control display module.
The instrument measurement is mainly divided into 5 modules, which are respectively interval, integral point measurement setting, measurement parameter selection (only chemical module), measurement mode selection (only chemical module) and measurement mode. The execution is an instant trigger button, and the instant trigger button is immediately executed according to the current setting after being clicked. After the integral point measurement is clicked, a setting interface can be entered according to the prompt double-click time point, and five-parameter execution or non-execution selection and chemical module measurement operation selection can be carried out on each integral point.
The measurement time and the whole-point measurement time can be set, the whole machine measurement and the single parameter measurement can be selected according to the parameter measurement requirement, and the automatic measurement and the inverse control measurement can be divided according to the control mode.
The interval and hour settings are associated with a measurement mode, where a single measurement is performed only once. The chemical modules (permanganate index, ammonia nitrogen, total phosphorus and total nitrogen) can be selectively measured, and meanwhile, remote reverse control quality control measurement can be alternated according to the field requirements. The quality control measurement is consistent with the requirements of national standard stations and respectively comprises a parallel sample test, a standard sample check, a water sample standard adding test, a zero drift test and a measuring range drift test (zero standard measurement); this function can be entered into a single chemical module for manual operation and remote Modbus triggering.
The chemical single-parameter testing module adopts a potassium permanganate oxidation spectrophotometry, the ammonia nitrogen testing module adopts a salicylic acid spectrophotometry, the total phosphorus testing module adopts an ammonium molybdate spectrophotometry, the total nitrogen testing module adopts a potassium persulfate oxidation ultraviolet spectrophotometry, and the chemical oxygen demand adopts a potassium dichromate oxidation spectrophotometry.
The reagent bottle comprises pure water, a glucose solution, an ammonium chloride solution, a potassium dihydrogen phosphate solution, a potassium nitrate solution and a potassium hydrogen phthalate solution.
The equipment further comprises a wastewater liquid level meter, a pure water liquid level meter, a gas blowing valve, an electric ball valve, a five-parameter acquisition module liquid level meter, a safety protection module and an ultrasonic Doppler flow meter, wherein the wastewater liquid level meter, the pure water liquid level meter, the gas blowing valve, the electric ball valve and the five-parameter acquisition module liquid level meter are all connected to a main control interface circuit board.
The method refers to the monitoring technical specifications in a national surface water environment quality automatic monitoring station (hereinafter referred to as a national station) and comprises parallel testing, standard sample checking, water sample adding and drifting testing, and the method can be set in instrument measurement if the whole point needs to be checked at zero point and standard sample checking).
And (3) parallel testing: the collection and determination of the parallel sample is a measure for implementing the quality assurance of environmental monitoring. The measurement results of the parallel samples reflect the precision level of the test to some extent. In environmental monitoring, the percentage of parallel samples collected and measured should be determined according to the lot size of the samples, the difficulty of measurement, the presence or absence of quality control, and the like, and is generally not less than 10% of the total samples. The determination result of the parallel sample can be judged whether the parallel sample is qualified or not according to the limit specified by the standard method, and the determination result can also be pointed into a quality control chart for judgment.
The testing process comprises the following steps: the substation control software receives a remote instruction or a field timing trigger instruction, starts a substation field water sampling unit and pretreatment, a pretreated water sample enters the water sample storage tank through a pipeline, and the volume is fixed through a drain valve. After the water sample preparation is finished, the substation control software triggers the instrument to measure the water sample for the first time, and the instrument extracts the water sample from the water sample storage tank of the quality control device. And after the first measurement of the instrument is finished, the substation control software triggers the instrument again to carry out the second measurement. After the second measurement is finished, the substation control software carries out relative error calculation analysis on the results of the two measurements, and the results are recorded and stored and are simultaneously uploaded to the central platform to serve as a reference basis for the quality control audit basis of the on-line monitoring data.
And (3) standard sample checking: the check is carried out by measuring standard samples. And the substation control software receives a remote instruction or a field timing trigger instruction, starts a quality control unit corresponding to the instrument to cut the sample tube of the quality control unit to a standard sample channel with specified concentration, and then triggers a measurement task of the instrument, and the instrument extracts the inspection standard solution from a container of the quality control device. After the measurement of the instrument is finished, the substation control software carries out relative error calculation analysis on the concentration of the standard sample and the measurement result of the instrument, records and stores the result and uploads the result to the central platform as a reference basis for the quality control audit basis of the on-line monitoring data.
Adding a water sample: taking two parts of the same sample, and adding a quantitative standard substance of the component to be detected into one part of the sample; and (3) simultaneously analyzing the two parts according to the same analysis step, subtracting the result obtained by adding the part without the standard from the result obtained by adding the part with the standard, and determining the ratio of the difference value to the theoretical value of the added standard substance as the sample standard adding recovery rate. The measurement of the recovery rate of the added standard is a quality control technology which is often used for automatic control in a laboratory. Theoretical formula: the recovery rate of spiked sample (spiked sample measurement value-sample measurement value) ÷ spiked amount × 100%.
The testing process comprises the following steps: the substation control software receives a remote instruction or a field timing trigger instruction, starts the on-site water sampling unit of the substation and carries out pretreatment, and the pretreated water sample enters the water sample storage tank through the pipeline. After the water sample preparation is finished, the substation control software triggers the instrument to measure the water sample for the first time, and the instrument extracts the water sample from the water sample storage tank of the quality control device. After the instrument finishes the measurement for the first time, the quality control device quantitatively adds the high-concentration standard-adding liquid into the water sample storage tank through the injection pump, and blows air to the water sample storage tank through the air pump to uniformly mix the water sample after the standard is added. After the preparation of the added standard water sample is finished, the substation control software triggers the instrument again to carry out the second measurement. After the second measurement is finished, the substation control software calculates the standard adding recovery rate according to the two measurement results before and after standard adding, performs error judgment, records and stores the result and uploads the result to the central platform as a reference basis for the online monitoring data quality control auditing basis.
And (3) drift test: the continuous drift test can be carried out on the zero point correction fluid and the range correction fluid. And the zero mark and the quantity mark check are required to be carried out at the whole point, and the check can be set in the instrument test.
Zero-mark measurement: the check was performed by measuring pure water. And the substation control software receives a remote instruction or a field timing trigger instruction, starts a quality control unit corresponding to the instrument to cut the sample tube of the quality control unit to a pure water channel, and then triggers a measurement task of the instrument, and the instrument extracts pure water from a container of the quality control device. After the measurement of the instrument is finished, the substation control software analyzes the zero concentration and the measurement result of the instrument, and simultaneously uploads the result record to the central platform to be used as a reference basis for the quality control audit of the on-line monitoring data.
Measuring and mapping quantity: the check is made by measuring a standard solution of the specified concentration. The substation control software receives a remote instruction or a field timing trigger instruction, starts a quality control unit corresponding to the instrument to cut a sample tube of the quality control unit to a range calibration liquid channel, and then triggers a measurement task of the instrument, and the instrument extracts range liquid from a container of the quality control device. After the measurement of the instrument is finished, the substation control software analyzes the concentration of the range standard liquid and the measurement result of the instrument, records and stores the result and simultaneously uploads the result to the central platform to be used as a reference basis for quality control and audit of on-line monitoring data.
As shown in fig. 2 to 5, the five-parameter acquisition module comprises a tank body 1, a filter assembly 3, a pH temperature sensor, a dissolved oxygen sensor, a turbidity sensor, a conductivity sensor and a cleaning and blowing assembly 4; the tank body 1 is obliquely arranged, and the liquid outlet end of the tank body 1 is higher than the liquid inlet end of the tank body 1, so that impurities can be conveniently precipitated at the lower part of the tank body after water enters the tank body, and the measurement precision of the water quality is further improved. The liquid inlet end of the tank body 1 is provided with a water inlet interface 101, the liquid outlet end of the tank body 1 is connected with an overflow interface 102, the upper part of the tank body 1 is provided with four sensor interfaces 103, and the installation of a pH temperature sensor, a dissolved oxygen sensor, a turbidity sensor and a conductivity sensor is facilitated through the sensor interfaces 103. The pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor are sequentially and respectively arranged on four sensor interfaces 103 of the tank body 1 from the feeding end to the discharging end, a filtering interface 104 is arranged in the middle of the four sensor interfaces 103, the assembly of the filtering component 3 is facilitated through the filtering interface 104, the filtering component 3 is arranged on the filtering interface 104 of the tank body 1, and the filtering component 3 is used for filtering impurities; four air blowing interfaces 105 are arranged at the lower part of the tank body 1 corresponding to the lower parts of the four sensor interfaces 103; the cleaning and blowing assembly 4 comprises four cleaning and blowing joints 401; four cleaning and blowing joints 401 are connected to the four blowing interfaces 105 of the tank body 1, and the cleaning and blowing joints 401 are matched with four sensors to realize self-cleaning.
The pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor respectively comprise a measuring probe limiting sleeve 21 and a measuring probe column 22; the measuring and detecting column 22 is arranged on the tank body 1 through the measuring probe limiting sleeve 21, so that better fixing is facilitated, and the detection precision is further improved. The measuring and detecting column 22 is positioned in the middle of the measuring probe limiting sleeve 21, and the lower part of the measuring and detecting column 22 is positioned in the tank body 1, so that the measuring and detecting column 22 can better detect the water quality in the tank body 1. A matching column sleeve 221 is arranged on the tank body 1 below the measuring and detecting column 22 on the pH temperature sensor, and the matching column sleeve 221 is connected to the air blowing interface 105 corresponding to the pH temperature sensor; be provided with cooperation concave surface 222 on the cooperation post cover 221, through cooperation concave surface 222 be convenient for better with the pH temperature sensor on measure to survey post 22 and cooperate, the bottom of survey post 22 is located cooperation concave surface 222 to measure on the pH temperature sensor, through cooperation concave surface 222 be convenient for better with measure to survey post 22 and cooperate and be convenient for promote the accuracy and the detection efficiency who detect.
The filter assembly 3 includes a filter base 31, four sampling ports 32 and a through interface 33, the filter base 31 is connected to the filter interface 104, a filter screen 311 is arranged at the bottom of the filter base 31, and other impurities are prevented from entering through the filter screen 311, so that the filter effect is further improved. Four sample connection 32 and the regular array of penetrating through interface 33 circumference are at the top of filtering seat 31, are convenient for carry out a lot of samplings through a plurality of sample connection 301, further promote the degree of accuracy of sampling to further promote and be convenient for carry out water quality measurement. A sampling connector 321 is connected to each sampling port 32, and the sampling connector 321 facilitates better connection. The through-port 33 is connected to a through-joint 331, and the through-joint 331 facilitates better connection.
Each of the cleaning and blowing joints 401 includes a blowing joint 402 and a blowing head 403, and the blowing head 403 is disposed in the top of the blowing joint 402, thereby facilitating further improvement of the connection strength through the blowing joint 402. The top of the blowing head 403 is positioned in the tank body 1, and the blowing head 403 is convenient for better blowing and cleaning. The four cleaning and blowing joints 401 correspond to the bottoms of the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor, and the conductivity sensor one to one. The probe is self-cleaned under the action of air blowing and does not influence measurement, so that the maintenance and cleaning cost and time are saved.
Still be provided with on jar body 1 and remove algae subassembly 5, remove algae subassembly 5 and be used for the degerming of liquid and remove algae, remove algae subassembly 5 and include two algae removal metal head 501, two algae removal metal head 501 connect respectively in the anterior left and right sides of jar body 1. Through two algae removal metal heads 501, cations are released into the measurement water body under the condition that the measurement is not influenced, so that the breeding of microorganisms and algae is reduced, and the effects of degerming and algae removal are achieved.
The upper side of the liquid outlet end part of the module is provided with a through joint 7, and the through joint 7 is connected with a through interface 33 through a pipeline. Through the through joint 7, better liquid conveying is facilitated, and therefore water quality measurement is further improved. A liquid level detection head 6 is arranged on the front side of the liquid outlet end part of the device, and the liquid level detection head 6 is used for detecting the liquid level of the tank body 1. The liquid level detection head is convenient for feeding and knowing the condition of the water level in the tank body, so that the water level can be better controlled.
The acquisition method of the water environment parameter acquisition module sequentially comprises the following steps: the water gets into from water inlet 101, places through the slope and makes impurity pile up in the bottom, and the water is measured quality of water through four sensors in proper order, removes algae metal head 501 release positive ions through two, reduces microorganism and alga and breeds, blows to the sensor bottom through wasing blowing joint 401 simultaneously to realize the clear effect of oneself, need not take out the probe again and wash the maintenance.
The module adopts a round and compact design structure, has smaller installation space and is convenient to be assembled into equipment better; the tank body is obliquely arranged, so that impurities can be conveniently deposited, and the measurement quality is improved; through the matching of the cleaning and blowing joint and the sensor, the probe is ensured to be self-cleaned under the action of air blowing without influencing measurement, and the maintenance and cleaning cost and time are saved; the algae removal component releases cations into the measurement water body under the condition of not influencing measurement, so that the breeding of microorganisms and algae is reduced; the device can realize the functions by using measurement water, but does not exclude access to other clean water sources; the small-sized low-power-consumption air source is adopted to realize self-cleaning, and the effects of energy conservation and environmental protection are achieved.
The following figures are five parameter data from 9 am on 23.7.19 years to 5 am on 22.7.19 months:
| time of day | CODnn(mg/L) | Ammonia oxygen (mg/L) | Total phosphorus (mg/L) | Total oxygen (mg/L) | pH | Electric conductivity (u) | |
| 1 | 19-07-23 09:00 | 16.8 | 0.78 | 0.033 | 2.66 | 7.59 | 236.6 |
| 2 | 19-07-23 07:00 | 16.7 | 0.79 | 0.026 | 2.75 | 7.59 | 234.6 |
| 3 | 19-07-23 05:01 | 17.1 | 0.78 | 0.038 | 2.80 | 7.61 | 234.7 |
| 4 | 19-07-23 03:01 | 17.7 | 0.78 | 0.057 | 2.70 | 7.65 | 233.9 |
| 5 | 19-07-23 01:43 | -- | -- | -- | -- | 7.62 | 231.2 |
| 6 | 19-07-23 00:43 | -- | -- | -- | -- | 7.58 | 232.6 |
| 7 | 19-07-22 23:00 | 15.9 | 0.80 | 0.030 | 2.72 | 7.58 | 232.5 |
| 8 | 19-07-22 21:00 | 16.4 | 0.79 | 0.031 | 2.74 | 7.58 | 232.5 |
| 9 | 19-7-22 19:00 | 15.7 | 0.80 | 0.030 | 2.79 | 7.59 | 230.1 |
| 10 | 19-07-22 17:01 | 16.0 | 0.79 | 0.027 | 2.77 | 7.59 | 230.4 |
| 11 | 19-07-22 15:00 | 16.1 | 0.81 | 0.035 | 2.76 | 7.60 | 226.6 |
| 12 | 19-07-22 13:01 | 15.8 | 0.81 | 0.033 | 2.77 | 7.61 | 226.4 |
| 13 | 19-07-22 11:01 | 15.6 | 0.80 | 0.025 | 2.77 | 7.60 | 227.9 |
| 14 | 19-07-22 09:00 | 16.0 | 0.80 | 0.030 | 2.83 | 7.61 | 225.8 |
| 15 | 19-07-22 07:00 | 15.3 | 0.82 | 0.026 | 2.77 | 7.61 | 227.2 |
| 16 | 19-07-22 05:00 | 15.7 | 0.79 | 0.032 | 2.75 | 7.63 | 226.1 |
To sum up, the advantage of this patent is be convenient for realize automatically cleaning and non-maintaining effect to further promote water measuring stability and accuracy, reach energy-concerving and environment-protective effect simultaneously.
Claims (9)
1. The equipment is characterized by comprising a case, a pretreatment module, a waterway pipeline, a five-parameter acquisition module, a chemical single-parameter testing module, a central control transmission module and an industrial control display module, wherein the pretreatment module, the waterway pipeline, the five-parameter acquisition module, the chemical single-parameter testing module, the central control transmission module and the industrial control display module are arranged in the case; the pretreatment module one end pretreatment module connect the outside water inlet, the other end connects the waterway pipeline, the waterway pipeline connects the five-parameter acquisition module, the chemical single-parameter test module comprises a plurality of reagent bottles, a peristaltic pump, an electromagnetic eight-way valve, a permanganate index test module, an ammonia nitrogen test module, a total phosphorus test module, a total nitrogen test module and a chemical oxygen demand, the water outlet of the five-parameter acquisition module and each reagent bottle are connected to the electromagnetic eight-way valve, the water outlet of the electromagnetic eight-way valve is respectively connected to the chemical single-parameter test module, the chemical single-parameter test module selectively measures and sends data to the central control transmission module, the central control transmission module comprises a chemical single-parameter acquisition circuit board, a chemical single-parameter control circuit board, an electrode interface circuit board and a main control interface circuit board, the chemical single-parameter acquisition circuit board, the peristaltic pump and the electromagnetic eight-way valve are connected to the, the chemical single-parameter control circuit board is connected to the industrial control display module; the five-parameter acquisition module acquires real-time measurement of water temperature, pH, turbidity, conductivity and dissolved oxygen and sends data to the electrode interface circuit board, and the electrode interface circuit board is connected to the industrial control display module; the industrial control display module collects data to perform parallel sample testing, standard sample checking, water sample adding standard, zero drift and range drift testing on the chemical single-parameter testing module, and the measuring result is uploaded and displayed through the industrial control display module.
2. The micro surface water environment quality detection device as recited in claim 1, wherein the five parameter acquisition module comprises a pH temperature sensor, a dissolved oxygen sensor, a turbidity sensor and a conductivity sensor.
3. The micro surface water environment quality detection device as claimed in claim 1, wherein the chemical single-parameter test module adopts potassium permanganate oxidation spectrophotometry, the ammonia nitrogen test module adopts salicylic acid spectrophotometry, the total phosphorus test module adopts ammonium molybdate spectrophotometry, the total nitrogen test module adopts potassium persulfate oxidation ultraviolet spectrophotometry, and the chemical oxygen demand adopts potassium dichromate oxidation spectrophotometry.
4. The miniature surface water environment quality detection device according to claim 1, further comprising a wastewater level meter, a pure water level meter, an air blowing valve, an electric ball valve, a five-parameter acquisition module level meter, a safety protection module and an ultrasonic Doppler flow meter, wherein the wastewater level meter, the pure water level meter, the air blowing valve, the electric ball valve, the five-parameter acquisition module level meter, the safety protection module and the ultrasonic Doppler flow meter are connected to the main control interface circuit board.
5. The miniature surface water environment quality detection equipment according to claim 2, wherein the five-parameter acquisition module further comprises a tank body (1), a filtering component (3) and a cleaning and blowing component (4); the tank body (1) is obliquely arranged, the liquid outlet end of the tank body (1) is higher than the liquid inlet end of the tank body (1), and impurities are precipitated at the liquid inlet end; a water inlet interface (101) is arranged at the liquid inlet end of the tank body (1), an overflow interface (102) is connected with the liquid outlet end of the tank body (1), four sensor interfaces (103) are arranged at the upper part of the tank body (1), and a filtering interface (104) is arranged in the middle of the four sensor interfaces (103); the lower part of the tank body (1) is provided with four air blowing interfaces (105) corresponding to the lower parts of the four sensor interfaces (103); the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor are sequentially and respectively arranged on four sensor interfaces (103) of the tank body (1) from the feeding end to the discharging end, and respectively comprise a measuring probe limiting sleeve (21) and a measuring detection column (22); the measuring and detecting column (22) is arranged on the tank body (1) through a measuring probe limiting sleeve (21), the measuring and detecting column (22) is positioned in the middle of the measuring probe limiting sleeve (21), and the lower part of the measuring and detecting column (22) is positioned in the tank body (1); a matching column sleeve (221) is arranged on the tank body (1) below the measuring and detecting column (22) on the pH temperature sensor, and a matching concave surface (222) is arranged on the matching column sleeve (221); the filtering component (3) is arranged on the filtering interface (104) of the tank body (1), and the filtering component (3) is used for filtering impurities; the cleaning and blowing assembly (4) comprises four cleaning and blowing joints (401); the four cleaning blowing joints (401) are connected to the blowing interface (105) of the tank body (1), the cleaning blowing joints (401) are matched with the measuring probe (201), and the matching column sleeve (221) is connected to the blowing interface (105) corresponding to the pH temperature sensor; the tank body (1) is further provided with an algae removal assembly (5), the algae removal assembly (5) is used for degerming and removing algae of liquid, the algae removal assembly (5) comprises two algae removal metal heads (501), and the two algae removal metal heads (501) are connected to the left side and the right side of the front portion of the tank body (1) respectively.
6. The self-maintenance probe measuring device according to claim 5, wherein the filter assembly (3) comprises a filter base (31), four sampling ports (32) and a through interface (33), the filter base (31) is connected to the filter interface (104), a filter screen (311) is arranged at the bottom of the filter base (31), the four sampling ports (32) and the through interface (33) are circumferentially and regularly arranged at the top of the filter base (31), each sampling port (32) is connected with a sampling joint (321), and the through interface (33) is connected with a through joint (331).
7. A self-maintenance probe measuring device according to claim 5, characterized in that each cleaning and blowing connector (401) comprises a blowing connector (402) and a blowing head (403), the blowing head (403) is arranged in the top of the blowing connector (402), and the top of the blowing head (403) is positioned in the tank body (1); the four cleaning and blowing joints (401) correspond to the bottoms of the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor one by one.
8. A self-maintenance probe measuring device according to claim 5, characterized in that a liquid level detecting head (6) is arranged at the front side of the liquid outlet end part of the device, and the liquid level detecting head (6) is used for detecting the liquid level of the tank body (1).
9. A self-maintenance probe measuring device according to claim 5, characterized in that the device is provided with a through connector (7) at the upper side of the liquid outlet end, and the through connector (7) is connected with the through interface (33) through a pipeline.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929265A (en) * | 2020-10-09 | 2020-11-13 | 天津市赛普新锐仪器科技有限公司 | Accurate compensation determination method for COD and/or BOD of domestic sewage |
| CN112114002A (en) * | 2020-08-07 | 2020-12-22 | 北京建筑大学 | Precipitation and surface runoff water quality full-parameter online measurement system and application |
| CN112114002B (en) * | 2020-08-07 | 2024-06-07 | 北京建筑大学 | Precipitation and surface runoff water quality full-parameter online measurement system and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114002A (en) * | 2020-08-07 | 2020-12-22 | 北京建筑大学 | Precipitation and surface runoff water quality full-parameter online measurement system and application |
| CN112114002B (en) * | 2020-08-07 | 2024-06-07 | 北京建筑大学 | Precipitation and surface runoff water quality full-parameter online measurement system and application |
| CN111929265A (en) * | 2020-10-09 | 2020-11-13 | 天津市赛普新锐仪器科技有限公司 | Accurate compensation determination method for COD and/or BOD of domestic sewage |
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