35 results about "Alkalinity" patented technology

The invention discloses an acid-base permeation capacity detection device of an acid-base resistant membrane, and relates to the technical field of membrane detection, the acid-base permeation capacity detection device of the acid-base resistant membrane comprises a support, a first detection bottle and a second detection bottle are fixedly installed on the support, and membrane discs are inserted into the first detection bottle and the second detection bottle. An operation table is arranged on one side of the support, a mechanical arm is fixedly installed at one end of the operation table, a clamp is movably connected to the tail end of the mechanical arm, a detection table is installed at the other end of the operation table, and film discs are inserted into notches in a first detection bottle and a second detection bottle to divide the space in the bottles into two parts. Acidic and alkaline solutions are respectively input into the upper half part, penetration detection is carried out under the pressure of the water pump, the acid-base property of the liquid at each position is detected in real time through the detectors at the upper and lower ends of the detection bottle, a real use environment can be simulated by adjusting the output pressure of the water pump and the temperature control part, and the accuracy of a detection result is ensured.

1. Name of the product in this design: Soil Tester. 2. Purpose of this design: For testing soil moisture, acidity, alkalinity, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses an on-line automatic monitoring method and system for total alkalinity in water, and relates to the technical field of water quality on-line monitoring. When the current measuring state of the system is a starting state, a sampling unit is controlled to convey a target water sample to a mixed reaction unit based on a preset water sample flow; the reagent unit is controlled to convey a target reagent to the mixed reaction unit; dynamically adjusting the flow rate of the target reagent based on a proportional integral differential control strategy, so that the pH value of a mixed solution formed by mixing the target water sample and the target reagent in the mixed reaction unit fed back by the detection unit in real time is stabilized at a preset endpoint pH threshold value; and determining the total alkalinity of the target water sample based on the flow velocity of the target reagent when the pH value is stable, the concentration of the target reagent and the preset water sample flow. The pH value is stabilized at the titration end point by dynamically adjusting the reagent flow rate, the total alkalinity is calculated according to the reagent flow rate, the water sample flow rate and the reagent concentration during balance, continuous and rapid measurement can be realized, and the reagent consumption is low.

The utility model relates to the technical field of acidity and alkalinity detection, and provides foaming agent acidity and alkalinity detection experimental equipment which comprises an equipment body, sliding plates are connected to the two sides of the equipment body in a sliding mode, protection plates are fixedly connected to the tops of the sliding plates, and by arranging the protection plates, the top of the equipment body can be shielded by the protection plates; under the action of the vertical plate, the two sides of the equipment body can be shielded, so that the equipment body is protected, dust is prevented from falling on the equipment body, when the protection plate needs to be disassembled, the baffle is pulled upwards, the baffle is separated from the sliding plate, the sliding plate can be pulled out, the protection plate can be disassembled, and when the height of the test pen needs to be adjusted, the protection plate can be disassembled. When the control ring is rotated, the connecting plate and the mounting plate can be driven to descend along the vertical rod, and the top of the limiting rod also descends along the top of the vertical rod, so that the height of the test pen is adjusted, and the test pen is controlled to enter the container to detect the foaming agent.

The utility model relates to the technical field of soil acidity and alkalinity determination, in particular to a rapid acidity and alkalinity determination device for soil detection, which comprises a shell and a stirring unit arranged in the shell, a rotating shaft is arranged in the shell in the vertical direction, the axis of the rotating shaft and the axis of the shell are collinear, when the stirring unit operates, the rotating shaft rotates around the axis of the rotating shaft, a plurality of stirring assemblies are arranged on the rotating shaft in the vertical direction, each stirring assembly comprises a plurality of stirring rods, and the stirring rods are evenly distributed around the axis of the rotating shaft. The stirring rod is hinged to the rotating shaft, a control groove is formed in the rotating shaft in the vertical direction, a plurality of lifting discs are movably arranged in the control groove in the vertical direction, and connecting rods hinged to the lifting discs and the hinge rod are arranged between the lifting discs and the hinge rod. According to the utility model, the cleaning efficiency of the measuring device is improved, the measuring speed of the measuring device is further improved, and the accuracy of a measuring result is ensured.

The invention discloses a dosage calculation method for reducing sewage hardness through a dual-alkali method. The method comprises the specific calculation steps that 1, the total hardness and calcium hardness of sewage are measured; 2, calculating the magnesium hardness; step 3, determining phenolphthalein alkalinity and methyl orange alkalinity of the sewage; 4, calculating the concentrations of hydroxide, carbonate and bicarbonate; step 5, setting a double-alkali excess amount; step 6, calculating the dosage of NaOH; and step 7, calculating the dosage of Na2CO3. Compared with the prior art, the method has the advantages that the calculation precision is high: based on the actual ion concentration (calcium and magnesium hardness and alkalinity) of the sewage and a clear chemical reaction metering relationship, the blindness of a trial and error method is avoided, the dosage can be accurately controlled, and the risk of agent waste (cost reduction) or substandard hardness reduction (membrane scaling prevention) is reduced; the response speed is high; the operation is simple; the economical efficiency is good; the applicability is wide.

A multifunctional detection test kit includes a water test paper including a base and a plurality of test modules provided on different test zones of the base. Each of the test modules is configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine water hardness, lead, iron, copper, nitrite, nitrate, MPS, nickel, and phosphate.

The present invention relates to a device (1) for measuring the alkalinity of a liquid (41) present in an external reservoir (40). More particularly, the proposed device (1) is used in the aquarium sector for monitoring water quality (41) in marine aquariums (40), performing the mensuration and automatic correction of the alkalinity of this water (41), especially in aquariums (40) that have coral reefs and other sensitive organisms present in saltwater aquariums. In addition, the present invention also proposes a process for measuring the alkalinity of a liquid (41) in an external reservoir (40). In particular, the proposed device (1) and process are characterized in that they comprise a control unit (70) capable of determining the alkalinity of an external liquid (41) present in an external reservoir (40) to the mensuration device (1) by using a CO2SYS method in conjunction with information previously stored in said control unit (70).

1. Name of the design product: Acid-proof sensor. 2. Use of the design product: for detecting and measuring the acidity and alkalinity of a solution. 3. Design features of the design product: in the perspective view. 4. Picture or photograph best indicating the design features: perspective view.

A multifunctional detection test paper includes a base and a plurality of test modules attached to the base. The base includes a base layer and a hydrophobic layer coated thereon, wherein the hydrophobic layer has a plurality of test zones spaced apart from each other. The test modules are provided on the test zones of the hydrophobic layer respectively to separate the test modules from the base layer, wherein each of the test modules includes a detection substance being configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine and water hardness when the test modules are immersed into water.

The application discloses a hazardous waste acid-base determination method, which utilizes the principle of acid-base neutralization reaction heat release, determines three heat flow data of the self heat release of the measured hazardous waste sample, the reaction heat release after the measured hazardous waste sample is mixed with acid and the reaction heat release after the measured hazardous waste sample is mixed with alkali under constant external conditions, compares the sizes of the three heat flow data to determine the acid-base property of the substance, solves the difficult problem of hazardous waste acid-base determination, is suitable for the acid-base determination test involved in the storage and disposal of hazardous waste in the chemical industry, has the characteristics of simplicity, directness, high efficiency and strong applicability, and is suitable for the acid-base determination of all kinds of hazardous waste.

A device and method for a differential analysis of ocean's CO2 are described. In particular, the device and method allow quantification of CO2 removal and storage in seawater (or freshwater), wherein the device and method measure the difference in the three parameters of the aqueous inorganic carbon system—pH, Dissolved Inorganic Carbon (DIC), and Total Alkalinity (TA)—for a pair of samples comprising an untreated sample of ambient seawater (or another water source) and a treated sample comprising an effluent leaving a CO2 removal apparatus, to determine a bicarbonate concentration difference between the treated and untreated samples and, as such, the amount of CO2 absorbed via the CO2 removal apparatus.

The invention discloses a dosage calculation method for regulating and controlling the acidity of required soil by using an alkaline material, which comprises the following steps: step 1, measuring the initial pH value of the soil to be regulated and controlled, and generating a pH-lime water addition amount curve by using a calcium hydroxide titration method; 2, according to the pH-lime water addition amount curve, obtaining the lime demand amount for adjusting the soil; 3, according to the lime demand quantity for adjusting the soil, obtaining the lime equivalent value of an alkaline material and the alkaline material demand quantity for adjusting the soil through an acid extraction-alkali back titration method; and 4, according to the demand quantity of the lime for adjusting the soil and the demand quantity of the alkaline material for adjusting the soil, obtaining the combined dosage of the lime with the target pH value and the alkaline material. The method provided by the invention has the characteristics of reducing soil acidity, realizing dynamic adaptation of total alkalinity and reducing the risk of excessive application of a single material.

The present disclosure relates to devices, systems, uses and methods for determining the amount of carbon dioxide absorbed by a soil permeate (1). The method comprises positioning the device (3) at a measurement location (7) in the soil (2). A basicity storage layer (6) of the device (3) is arranged below the upstream wall (5), wherein the basicity storage layer (6) is formed from a material bearing a plurality of acidic groups on its surface. The method further comprises allowing the mineral (4) to react with water and carbon dioxide during the measurement time period to form a soil permeate (1) that permeates through the soil (2) and through the alkalinity storage layer (6), thereby deprotonating at least a portion of the acidic groups of the material forming the alkalinity storage layer (6). The method further comprises determining the total alkalinity absorbed by the alkalinity storage layer (6) and determining the total amount of carbon dioxide absorbed by the soil permeate (1) based on the determined total alkalinity absorbed by the alkalinity storage layer (6).

The present application relates to a method for improving the content of calcium carbonate in electrolytic water precipitate, taking calcium hardness, magnesium hardness and alkalinity as independent variables, obtaining the regression model of calcium hardness, magnesium hardness and alkalinity and the regression model of gas-water ratio under the condition of non-aeration improvement, calculating the gas-water ratio, realizing the application of electrolytic water precipitate in limestone wet flue gas desulfurization, improving the reaction rate of electrolytic water precipitation process and the content of calcium carbonate in electrolytic water precipitate to more than 95%, realizing the application of electrolytic water precipitate in limestone wet flue gas desulfurization, directly calculating the working condition of aeration improvement according to the quality of cooling water, avoiding blind test and saving labor cost; the water quality index of enterprise cooling water can be directly applied in this range, and the regression equation can be determined again according to the test method if it is not in this range, which has strong applicability.

A multifunctional detection test paper includes a base and a plurality of test modules attached to the base. The base includes a base layer and a hydrophobic layer coated thereon, wherein the hydrophobic layer has a plurality of test zones spaced apart from each other. The test modules are provided on the test zones of the hydrophobic layer respectively to separate the test modules from the base layer, wherein each of the test modules includes a detection substance being configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine and water hardness when the test modules are immersed into water.

This invention discloses a method for calculating and evaluating the erosiveness of slag used for converter slag splashing protection, relating to the field of metallurgical technology. The method includes: obtaining the chemical composition of the slag; thermodynamically calculating the Gibbs free energy of the reaction between each component and magnesia-carbon bricks, classifying components as strongly / weakly erosive; and calculating the oxidative erosion capacity Q. ox (Total oxygen content of highly corrosive components) and structural erosion ability Q st (low melting point liquid phase content × basicity coefficient); and a temperature correction factor is introduced. T Finally, the erosivity index Q is calculated. 侵蚀 = T ×[a1×Q ox +a2×Q st ]. Q 侵蚀 Compared with thresholds of 30 and 60, the slag is determined to be low, medium, or high corrosivity, and suggestions are given for direct slag splashing, adjusted slag splashing, or slag dumping. Industrial verification has confirmed that Q... 侵蚀 The corrosion rate was significantly positively correlated with the actual furnace lining corrosion rate (r=0.93), and the corrosion rate decreased by 70-80% after adjusting the slag composition. This invention fills the gap in the quantitative evaluation of slag corrosivity and provides a scientific and simple operational basis for slag splashing protection of the furnace.

This invention discloses a method for controlling the chemical dosing of circulating water to prevent corrosion and scaling, comprising: S1: continuously collecting circulating water samples in real time through an online water quality monitoring probe to obtain measured pH value, water temperature (t), total dissolved solids (TDS), calcium hardness, and total alkalinity, and uploading the data to the control host in real time; S2: calculating the Langerile saturation index (LSI) based on the data uploaded to the control host; S3: classifying the circulating water quality level and judging the circulating water quality based on the LSI; S4: generating a corresponding dosing strategy based on the circulating water quality, and performing dosing according to the dosing strategy; S5: repeating steps S1 to S4 after dosing, which has the advantages of high automation and precise control.

The application relates to a method for measuring total alkalinity of different base water bodies, and belongs to the field of total alkalinity measurement of water bodies, which can measure wide-range alkalinity of different base water bodies. The steps of the application are as follows: filtering a water sample to be measured, adding the water sample into a colorimetric cup, adding an indicator and hydrochloric acid in sequence, discharging air for a certain time after fully mixing the water sample, reading the absorbance of the water sample at a corresponding characteristic wavelength by using a spectrophotometer, substituting the absorbance into an alkalinity algorithm to obtain algorithmic alkalinity, and bringing the algorithmic alkalinity into a correction equation to obtain the total alkalinity of the water sample to be measured. The application has the advantages of simple operation, low requirement on instruments, easy availability of test materials, small required sample volume, and the like, and can be used for measuring total alkalinity of different base water bodies.

The invention discloses a method for batch determination of alkalinity in metallurgical industry circulating water. The method comprises the following steps: 1) electrode calibration; 2) setting titration parameters; 3) determination; 4) calculating data; a calculation formula is built in software, and a result is automatically calculated. The invention aims to provide a method for measuring the alkalinity of metallurgical industry circulating water in batches, which is realized as follows: the detection precision is as follows: the relative error is less than or equal to 1.5%, and the reproducibility RSD is less than or equal to 2%; the detection efficiency is as follows: single detection is less than or equal to 5 minutes, and continuous determination of more than 10 batches of samples is supported; the adaptability is as follows: the alkalinity range of 5-1000 mg / L (based on CaCO) is covered, the tolerance suspended matter is less than or equal to 50 mg / L, and the silicon content is less than or equal to 15% of circulating water.

A multifunctional detection test paper includes a base and a plurality of test modules attached to the base. The base includes a base layer and a hydrophobic layer coated thereon, wherein the hydrophobic layer has a plurality of test zones spaced apart from each other. The test modules are provided on the test zones of the hydrophobic layer respectively to separate the test modules from the base layer, wherein each of the test modules includes a detection substance being configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine and water hardness when the test modules are immersed into water.

The embodiment of the invention discloses a seawater pH quality control sample and a preparation method thereof, and belongs to the technical field of analysis and detection. The method comprises the following steps: dissolving a buffer reagent in simulated seawater, and adjusting the pH value to a target value by using hydrochloric acid or sodium hydroxide to prepare a seawater pH quality control sample with the pH range of 2-10. The quality control sample with the pH range of 2-10 can be obtained, the wide range from strong acidity to weak alkalinity is covered, the pH measurement requirements of seawater samples in different sea areas and different depths are met, the pH quality control sample is good in stability, the validity period is as long as 2 years, the pH quality control sample can be widely applied to the fields of marine scientific research, environmental monitoring, water quality analysis and the like, and the application prospect is wide. And reliable technical support is provided for accurate measurement and quality control of the pH value of seawater.

1. Name of the product in this design: pH measuring instrument. 2. Purpose of this design: This design is used as an analytical instrument for determining the acidity or alkalinity of substances. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention provides a circulating water acid adding control method and system, a medium and electronic equipment, and relates to the technical field of circulating water scaling control. The method comprises the steps that the flow, alkalinity and chloride ion concentration of circulating water are obtained, and the evaporation capacity, alkalinity and chloride ion concentration of a tower pool are obtained; determining a first concentration ratio based on the flow of the circulating water and the evaporation capacity of the tower pool; determining a second concentration ratio based on the chloride ion concentration of the circulating water and the chloride ion concentration of the tower pool; determining a third concentration ratio based on the alkalinity of the circulating water, the alkalinity of the tower pool and a preset solubility product correction coefficient; according to the first concentration ratio, the second concentration ratio and the third concentration ratio, determining a comprehensive concentration ratio by adopting a weighted balance algorithm; and according to the comprehensive concentration ratio, the first preset information and a preset tower pool control alkalinity parameter, determining the dosage of the acidic material. The problem that in the prior art, the difference between the acid adding amount calculation result and the actual requirement is large is solved.

A multifunctional detection test kit includes a water test paper including a base and a plurality of test modules provided on different test zones of the base. Each of the test modules is configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine water hardness, lead, iron, copper, nitrite, nitrate, MPS, nickel, and phosphate.

The application provides a method for detecting the alkalinity of water sample, comprising the following steps: S1. constructing a mathematical model of the alkalinity of water body and the change value of the electric signal of water body; S2. contacting the water sample with acidic material to change the electric signal value of the water sample, collecting the electric signal value of the water sample before and after the water sample is contacted with the acidic material, and then constructing the change value of the electric signal of the water sample; and S3. substituting the change value of the electric signal of the water sample into the change value of the electric signal of the water body in the mathematical model to calculate the alkalinity of the water sample. The above method does not need to involve the use of titrant and the pre-calibration operation, and has low requirement on the hardware equipment, so that the complicated and tedious daily maintenance of the instrument can be saved, and the method has the advantages of simple operation, high reliability and green environmental protection.

The present invention discloses a method and system for measuring the precipitation rate of inorganic salts in water, an electronic device, and a storage medium. The method includes steps S1, S2, and S3. The steps include: (1) acquiring the type of precipitated inorganic salt in the sample water; (2) acquiring the inorganic carbon methyl orange alkalinity (Cmalk); (3) acquiring the initial content of the target inorganic salt; (4) acquiring the initial content of the target inorganic salt; (5) acquiring the carbon dioxide concentration (CO2w) or its equilibrium gas-phase carbon dioxide concentration (PCO2) in the sample water in a sealed, constant-temperature, constant-pressure environment; (6) acquiring the amount of precipitated target inorganic salt based on the data acquired in steps S1 and S2; and (7) acquiring the precipitation rate of the target inorganic salt based on the amount of precipitate acquired in step S3. The present invention provides a method for measuring the precipitation rate of inorganic salts in water with minimal manual intervention, a low lower limit of quantification, and high accuracy.

The invention discloses a reagent for rapidly detecting the alkalinity of industrial boiler water and application of the reagent, and belongs to the technical field of water quality analytical chemistry. The alkalinity reagent is divided into a phenolphthalein alkalinity reagent A, a phenolphthalein alkalinity reagent B, a total alkalinity reagent C and a total alkalinity reagent D. A water quality limit value-sample amount-reagent amount three-dimensional control detection system is constructed, two levels are set for each dimension, and the two levels of the two dimensions of the sample amount and the reagent amount are designed into a multiple relationship, so that the reagent purchasing problem can be solved, precursor components do not exist, purchasing does not need special examination and approval, visual detection can be performed, and the reagent purchasing efficiency is improved. The color of the end point is easy to distinguish, pertinence is high, boiler blowdown is guided, and energy conservation and emission reduction are

The aqueous phase of a drilling fluid can be provided with self-adjusting alkalinity by introducing a buffering system, where the buffering system includes a buffering agent, an acid or a base, and an inorganic salt, and where the pH of the aqueous phase is in the range of from about 8 to about 12. In one non-limiting embodiment, the pH does not vary by more than about 0.5 pH units after a variation in temperature of the drilling fluid of at least about 175° C. for at least about 200 hours.

The invention discloses a convenient method for testing the pH value of an ethyl silicate-ethanol mixed solution, and aims to solve the problems that existing pH test paper cannot be used for direct detection and a pH meter is tedious to operate. The method comprises the following steps: correcting by using a pH meter, measuring the pH value of an original solution, diluting the original solution by 10 times by using purified water, uniformly stirring, and measuring the pH value of the diluted solution; the pH test paper is used for detecting the pH of the diluent, the corresponding relation of the pH of the test paper, the pH after dilution and the pH before dilution is established, a pH meter is not needed for subsequent detection of the solution with the same proportion, and the pH of the original solution can be inversely deduced through the pH of the test paper. According to the method disclosed by the invention, the pH values of various ethyl silicate-ethanol mixed solutions before and after dilution are measured through the pH meter and are in one-to-one correspondence, and the pH value of the solution before dilution can be deduced subsequently according to the reading of the pH test paper and the corresponding value given by the table, so that the pH value of the ethyl silicate-ethanol mixed solution before dilution is quickly obtained.