13 results about "Alkalinity" patented technology

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 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).

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).

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 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 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 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 present application relates to a kind of inhibitor of high-efficiency separation copper-sulfur under low alkalinity condition, flotation reagent and flotation method, the inhibitor is the compound shown in formula I: (formula I);Wherein, R1, R2, R3, R4 each is independently selected from -R5X, -X, -H, -N + One of R6, R5 is C1-C10 alkyl, C3-C10 cycloalkyl or C3-C10 heterocyclic group, the ring of the heterocyclic group is with or without substituent;X is one of F, Cl, Br, I, tertiary amine positive ion, nitro, cyano, sulfonic acid group, formyl, acyl, carboxyl;R6 is C1-C5 alkyl or C3-C5 cycloalkyl;The inhibitor has low viscosity and good fluidity, can effectively separate pyrite and chalcopyrite in complex copper sulfide ore copper-sulfur ore under low alkalinity condition, and separation effect is remarkable.

The invention discloses a multilayer fluxed pellet which comprises three layers of gradient alkalinity structures from inside to outside: (1) the diameter of the innermost layer is 2-5mm, and the binary alkalinity of the innermost layer is 0.4-0.6; the innermost layer is wrapped with the middle layer, so that the diameter of the pellet reaches 5-10 mm, and the binary alkalinity is 0.7-0.9; (3) the middle layer is wrapped with the outermost layer, so that the overall diameter of the pellet reaches 8-16 mm, and the binary alkalinity is 0.9-1.1; a preparation method of a multilayer fluxed pellet comprises the following steps of a, innermost layer pelletizing, b, middle layer wrapping, c, outermost layer wrapping and d, roasting solidification. Compared with the prior art, the multilayer fluxed pellet has the advantages that the metallurgical performance is synergistically optimized, the roasting strength is remarkably improved, reduction degradation is effectively inhibited, and the process feasibility is high.