16 results about "Permanganate index" patented technology

The invention relates to the technical field of water body detection, and discloses a water body permanganate index detection device, which comprises a light beam output module, a reference light path, a measurement light path and a control module, the light beam output module outputs two paths of reference light and incident light with the same light intensity, the reference light path transmits the reference light to a first light intensity acquisition unit, and the measurement light path transmits the incident light to a second light intensity acquisition unit; the measuring light path inputs incident light into the reaction chamber and transmits emergent light of the reaction chamber to the second light intensity acquisition unit, the control module comprises a first light intensity acquisition unit, the second light intensity acquisition unit and a controller, and first light intensity of reference light and second light intensity of the emergent light are obtained through the first light intensity acquisition unit and the second light intensity acquisition unit; the titration end point of the potassium permanganate standard solution is determined based on the absorbance, so that the titration end point is judged by utilizing a method for measuring the optical absorbance, and the measurement accuracy is further improved.

The utility model relates to the technical field of permanganate detection, in particular to a high-accuracy water quality ORP (Oxidation Reduction Potential) permanganate index detection electrode method measuring chamber which comprises a detection module for measuring and outputting a numerical simulation signal, and a digestion container for accommodating sample liquid and a reagent for reaction, the heating module is used for heating the digestion container to generate steam, the condensation reflux device is used for digesting the heated steam to form liquid drops to fall back, and the stirring mechanism is used for fully stirring sample liquid and reagents. The device is simple in structure and reasonable in design, can realize a series of work such as automatic input reaction of sample liquid and reagents, heating of the sample liquid, digestion of steam, automatic stirring of the sample liquid and the reagents, automatic detection of permanganate indexes and the like, and is high in automation degree, high in detection efficiency, good in detection effect, high in integration and low in cost. Meanwhile, bottom liquid feeding is adopted, so that accumulation of water sample bubbles can be effectively avoided, dead volume can be reduced, and detection precision can be further improved.

The invention provides a method for monitoring the permanganate index of water quality on line. The method comprises the following steps: detecting the permanganate index of a water sample by adopting a titration method, and collecting the titration drop number and the absorbance of the water sample in the titration process; drawing a titration curve based on the titration drop number and the absorbance of the water sample; determining a titration end point based on the titration curve, and thus obtaining the titration drop number; and substituting the titration drop number into a standard function to obtain the permanganate index of the water sample. The method provided by the invention not only realizes on-line monitoring of the permanganate index of the water sample, but also is simple and convenient to operate, does not need frequent maintenance, can effectively reduce the use cost, improves the detection precision of the permanganate index of the water sample, and is beneficial to application and popularization.

1. The name of the design product: full-automatic permanganate index analyzer. 2. The use of the design product: for monitoring permanganate index in various water quality. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

This invention discloses a method for determining the permanganate index based on modified biochar adsorbents, comprising the following steps: Step 1, modifying the biochar with a modifying solution. When the concentration of the modifying solution is 0.1 mol / L, an acidic modifier is used to modify the biochar adsorbent; when the concentration of the modifier solution is 0.2~0.4 mol / L, a salt modifier is used. Step 2, thoroughly shaking and mixing the modified biochar adsorbent with a water sample, adding sulfuric acid solution to acidify the water sample, adding potassium permanganate solution to the acidified water sample and heating the reaction, adding sodium oxalate solution after heating, shaking until the solution becomes colorless and without precipitate, titrating with potassium permanganate solution while hot until a light pink color appears and does not fade within a fixed time, recording the volume of potassium permanganate solution consumed, and calculating the potassium permanganate index. The type and concentration of the modifier used in this invention have a significant impact on the adsorption performance of biochar.

The present application belongs to the technical field of water quality permanganate index detection, and particularly relates to a detection system for online monitoring of permanganate index. The present application provides a detection system for online monitoring of permanganate index, aiming at solving the problem of low detection precision of permanganate index in the prior art. The present method adopts a spectrophotometric colorimetric method, eliminates the reducing agent in the traditional online analysis method, reduces the reagent use cost, and also avoids the instability of sodium oxalate in a high-temperature and acidic environment, thereby generating systematic errors. The present method eliminates the use of reducing agent, and compared with the laboratory and the traditional online analysis process, the analysis process of the present method is reduced, the single test cycle is about 25 minutes, which is about 56-63% of the traditional online time length, and is far less than the analysis time length of the laboratory.

The application discloses a permanganate index online monitoring method and system, and the method comprises the following steps: S1, setting a minimum threshold value A; S2, taking a quantitative sample to be measured, then sequentially adding potassium permanganate solution and acid solution, and bubbling and mixing; S3, heating to 100 DEG C, and the duration is not more than 10 min, and then cooling to 40 DEG C; S4, adding an alkaline solution to the sample to be measured, bubbling and mixing; S5, adding 1 mL of pure water, bubbling and mixing, reacting for 5 min, and reading a received light intensity signal X; S6, comparing X with A; S8, calculating the absorbance of the sample to be measured, and S9, calculating the permanganate index of the water sample; the system comprises a four-channel valve, a heating pipe, a peristaltic pump, a twelve-channel valve and a metering pipe, the digestion is completed at 100 DEG C for 10 min, colorimetric test can be carried out, the reaction system only generates about 5 mL of reaction waste liquid at a time, the system has a self-cleaning function, the detection device does not need to be maintained in a life cycle, and the design achieves the purposes of short test time and low cost.

The invention provides a permanganate index on-line automatic determination method and system, and the method comprises the steps: synchronously obtaining an oxidation-reduction potential signal, an absorbance signal and a temperature signal of a to-be-detected solution at the same measurement point, and carrying out the temperature drift compensation of the oxidation-reduction potential to extract the potential change characteristics, thereby determining a predicted titration volume interval. If the potential change characteristic meets a first end point judgment condition and the absorbance signal reaches a verification threshold value, determining the corresponding volume as a first end point; if the potential change characteristic does not meet the condition or the absorbance signal does not reach the verification threshold value, the absorbance change characteristic is extracted based on the absorbance signal, and a second end point is determined when a second end point judgment condition is met. And judging a final titration end point according to the obtained number of end points and a difference value between the two end points, and calculating a permanganate index. Through potential and absorbance dual-signal collaborative decision making, the terminal point identification accuracy and the anti-interference capability are improved, and the method is suitable for online automatic monitoring of complex water bodies.

The invention discloses a method for determining an organic additive in an ammonia chloride method electrolytic zinc solution, and relates to the technical field of ammonia chloride method electrolytic zinc solution determination, and the method comprises the following steps: preparing an organic additive standard solution A with a concentration of a; the method comprises the following steps: diluting a to-be-detected sample of an ammonia chloride process electrolytic zinc solution with water to n times of volume to obtain a diluted sample; respectively measuring the permanganate indexes of the standard solution A and the diluted sample by adopting a potassium permanganate oxidation-sodium oxalate reduction titration method; calculating a conversion coefficient; and calculating the concentration of the organic additive in the to-be-detected sample according to a formula. According to the method, the unknown additive can be measured, and the measurement precision and reliability are improved, so that accurate data support is provided for the production process.

The invention discloses a permanganate index detection method and system based on a water quality detector, and relates to the technical field of water quality detection.The permanganate index detection method comprises the following steps that S1, a to-be-detected water sample and a potassium permanganate reagent react under preset conditions to form a to-be-detected reaction solution, the absorbance of the to-be-detected reaction solution is obtained through a spectrophotometer, and the absorbance of the to-be-detected reaction solution is calculated; obtaining the turbidity of the reaction liquid to be detected through a turbidimeter, establishing a turbidity interference database, and obtaining a turbidity interference compensation value through the turbidity interference database and the turbidity of the reaction liquid to be detected; the turbidity interference database is established, so that the corresponding turbidity interference compensation value is matched according to the turbidity condition of the reaction liquid, and the absorbance detected under the turbidity is corrected according to the turbidity interference compensation value, thereby being beneficial to avoiding the influence of the turbidity on the absorbance detection when the permanganate index is measured by a spectrophotometric method; and thus, the measurement result is more accurate.

The invention discloses an intelligent water station multi-parameter water quality cooperative monitoring and intelligent supervision platform, which relates to the technical field of water quality monitoring, adopts a distributed architecture, and comprises four core modules, the three modules are a data acquisition and preprocessing module, a multi-parameter analysis and quality control module, an intelligent supervision and operation and maintenance module and a big data analysis and decision support module. According to the intelligent water station multi-parameter water quality collaborative monitoring and intelligent supervision platform, through a multi-parameter collaborative monitoring technology, synchronous monitoring of multiple water quality parameters such as water temperature, pH, dissolved oxygen, conductivity, turbidity, ammonia nitrogen, permanganate index, total phosphorus, total nitrogen and chemical oxygen demand is achieved, and the problem that a traditional monitoring parameter is single is solved. Meanwhile, the intelligent pretreatment unit can automatically select the pretreatment modes of filtration, precipitation or centrifugation and the like according to the characteristics of water sample turbidity, particulate matter distribution and the like, and the reliability of analysis data is ensured in cooperation with regular calibration, multi-point linear check and standard recovery tests of the quality control unit.

The invention relates to a drainage basin river channel outlet section pollutant flux tracing method, which comprises the following steps of: firstly, decomposing pollutant flux into relatively stable point source flux and surface source flux which is obviously influenced by rainfall through an improved iterative algorithm by adopting a digital filtering technology; and then, performing further traceability analysis on point source and surface source flux obtained by decomposition by using absolute principal component score-multiple linear regression analysis, and identifying contribution proportions of different pollution sources such as an industrial point source, a living point source and an agricultural surface source. According to the method, by adjusting parameters of the digital filtering algorithm and the APCS-MLR analysis algorithm, mutual matching of results of the two algorithms is achieved, and the accuracy and reliability of traceability analysis are improved. The method is suitable for flux traceability of pollutant types such as permanganate index, ammonia nitrogen, total phosphorus and the like, and has important practical application value for drainage basin management and pollution control.

The utility model discloses a permanganate index analyzer convenient to collect water vapor, and relates to the technical field of permanganate index analyzers, the analyzer comprises a box body, and a digestion position is arranged in the box body; a water steam draining mechanism and a water steam collecting mechanism are arranged on the box body, the water steam draining mechanism comprises an air inlet formed in the left side of the box body, a right air outlet formed in the right side of the box body and an upper air outlet formed in the top of the box body, and exhaust fans are arranged at the right air outlet and the upper air outlet; the digestion position is positioned below the upper exhaust outlet; and the water vapor collecting mechanism is respectively communicated with the right air outlet and the upper air outlet. The water vapor collecting mechanism is mounted at the air outlet of the instrument, so that a large amount of water vapor generated when the instrument works can be collected, and the discharged water vapor is prevented from being attached to other equipment and instruments in a machine room, so that the normal operation of other equipment and instruments is not influenced; meanwhile, when the liquid in the liquid storage tank reaches a certain amount, the water vapor collecting mechanism can also automatically discharge the liquid.

The application provides a permanganate index online automatic determination method and system, the method comprises the following steps: synchronously acquiring the oxidation-reduction potential signal, the absorbance signal and the temperature signal of the solution to be measured at the same measurement point, and performing temperature drift compensation on the oxidation-reduction potential to extract the potential change characteristics, so as to determine the predicted titration volume interval. If the potential change characteristics meet the first end point determination condition and the absorbance signal reaches the verification threshold, the corresponding volume is determined as the first end point; if the potential change characteristics do not meet the condition or the absorbance signal does not reach the verification threshold, the absorbance change characteristics are extracted based on the absorbance signal, and the second end point is determined when the second end point determination condition is met. According to the obtained number of end points and the difference between the two end points, the final titration end point is determined, and the permanganate index is calculated. The application improves the end point recognition accuracy and the anti-interference ability through the cooperative decision of the potential and the absorbance signals, and is suitable for online automatic monitoring of complex water bodies.

The present application relates to a kind of multi-parameter water quality remote sensing inversion methods based on dynamic weighted ensemble learning, by spatial and temporal matching and preprocessing to multispectral remote sensing image and water quality monitoring data, construct basic dataset;Further fusion spectrum interaction feature, remote sensing index feature, time period feature and spatial statistical feature, form multi-source composite feature engineering, and obtain optimal feature subset by the feature screening mechanism of model importance, correlation and mutual information combination;On this basis, multi-model pool is constructed, and integrated learning is carried out according to model performance adaptive weight distribution, realize the synchronous inversion of turbidity, permanganate index, dissolved oxygen, total nitrogen and total phosphorus and other various water quality parameters.The present application can improve the stability and generalization ability of inversion result, and is suitable for remote sensing water quality monitoring application of multiple types of water body.

The application discloses a composite oxidizing agent water purifying agent and a preparation method thereof, and relates to the technical field of water treatment. The preparation method is as follows: 2-8 parts of potassium permanganate, 2-8 parts of sodium percarbonate, 5-15 parts of sodium hypochlorite, 2-8 parts of sodium persulfate, 2-8 parts of potassium hydrogen persulfate, 0.2-2 parts of titanium dioxide, 1-3 parts of sulfoblocked scale inhibition copolymer, 0.5-1.5 parts of black cumin seed regeneration powder, 5-20 parts of polyaluminum chloride, 5-15 parts of ferrous salt, 0.1-0.5 parts of calcium chloride and 0.1-0.5 parts of sodium bicarbonate are weighed according to the proportion and uniformly mixed to obtain the composite oxidizing agent water purifying agent. The composite oxidizing agent water purifying agent can solve the water quality problems such as the excessive permanganate index, the excessive heavy metal (manganese), the excessive microorganism, the excessive colority, the excessive turbidity and the like in the technical field of water treatment by the combination of various oxidizing agents, the addition of the prepared sulfoblocked scale inhibition copolymer and the black cumin seed regeneration powder.