198 results about "PH meter" patented technology

The invention discloses an automatic cleaning mechanism of a pH meter, comprising a connecting rod, wherein a pH electrode is arranged at the bottom of the connecting rod; an electrode signal wire passes through the connecting rod and is accessed into a special instrument; an electrode sheathing is connected with the connecting rod; and a sealing block is connected with the electrode sheathing. Through the action of an actuating mechanism, a pH electrode connected with the connecting rod is ascended and descended so as to achieve the purpose of separating the pH electrode from the liquid level for cleaning and maintaining or sinking into the liquid level to measure a measured medium. The special instrument can display a measurement result and control an electromagnetic valve and a water valve so as to realize the lifting control and the cleaning control of the pH electrode. The invention has the advantages of good cleaning and maintaining effects on the pH electrode, simple structure, safety, reliability, wide application range, service life extension of the pH electrode, and the like.

The invention relates to a measure apparatus of a flue gas desulphurization absorbing tower, a slurry pH meter and a densitometer by using a wet method and its method, which belongs to the field of desulphurization with environmental protection. The measure apparatus comprises a desulphurization island absorbing tower, a pH meter container, the pH meter, the densitometer and a slurry main pipe in the desulphurization island absorbing tower. According to the invention, the measure method employs an automatic control apparatus, so that the instrument on-line rate and the accuracy are raised, the workload for on-site apparatus maintenance can be minimized and the energy consumption is reduced.

The present invention relates to an apparatus and method of preparing carbonate and / or formate from carbon dioxide.The apparatus of preparing carbonate and / or formate from carbon dioxide (CO2), comprising: an electrolysis reactor comprising (i) an anode which contains an aqueous solution of a Group I metal salt as an electrolytic solution, (ii) an ion-exchange membrane through which metal cations derived from the Group I metal salt and water flow from an anode to a cathode, (iii) a cathode, and (iv) a gas diffusion layer which supplies a carbon dioxide-containing gas to the cathode;a power supply unit of applying a voltage between the anode and the cathode;a first gas-liquid separator of recovering the electrolytic solution from the products formed in the anode;a second gas-liquid separator of recovering carbonate and / or formate from the products formed in the cathode;a pH meter of measuring the pH of the electrolytic solution recovered from the first gas-liquid separator;a first reactant supply unit of supplying (a) the electrolytic solution recovered from the first gas-liquid separator and (b) the aqueous solution of the Group I metal salt with which the recovered electrolytic solution is replenished according to the pH of the electrolytic solution, to the anode; anda second reactant supply unit of supplying carbon dioxide or a mixer comprising carbon dioxide and water vapor to the cathode;wherein, when a voltage is applied between the anode and the cathode,in the anode, water undergoes electrolysis to generate hydrogen ions, oxygen, and electrons, and metal cations in the Group I metal salt are substituted with the hydrogen ions, while the generated metal cations move to the cathode through the ion-exchange membrane and the electrons move to the cathode through an external electric line; andin the cathode, carbon dioxide, water, metal cations, and electrons are reacted and produce carbonate and / or formate.

The invention discloses a method for online measurement of pH of cigarette main stream smoke in real time. The method is characterized by comprising the following steps: directly placing a reformed pH electrode into the smoke passage of a cigarette sucking machine; starting the cigarette sucking machine to suck the cigarette, wherein when the main stream smoke passes by the surface of the electrode, the acid and alkaline chemical substances in the main stream smoke react with a buffering solution on the pH electrode; recording the reading of a pH meter, and measuring the pH of the cigarette main stream smoke in real time. The method disclosed by the invention can be used for accurately measuring the pH of the cigarette main stream smoke and directly and comprehensively reflecting the acid and alkaline indexes of the cigarette main stream smoke, and compared with the prior art, the method has the characteristics of simple operation, high sensitivity and reliable result, and a novel method for measuring pH of cigarette main stream smoke is created.

The invention discloses a supervisory control method for producing trehalose by a double-enzyme method. The supervisory control method comprises the following steps of firstly mounting a near-infrared real-time monitoring and control system; collecting starch liquefied liquid, measuring a DE (Dextrose Equivalent) value by using a Fehling's reagent method, collecting catalysis liquid, measuring a pH (potential of Hydrogen) value by using a pH meter, measuring the content of the trehalose by using high performance liquid chromatography, associating with a correspondingly collected near-infrared spectrum, establishing a quantitative model of changes of the DE value, the content of the trehalose and the pH value in a production process, and correcting; afterwards, quickly detecting the DE value, the content of the trehalose and the pH value in the production process by utilizing the established model, and stabilizing the DE value to be 8 to 20 and stabilizing the pH value to be in the range, in which the activity of malto-oligosaccharide based trehalose synthase-MTSase and malto-oligosaccharide based trehalose hydrolase-MTHase is optimal, by utilizing a control system. The method can be used for monitoring the DE value of starch liquid and the content of the trehalose in reaction liquid in real time and can also used for automatically controlling the change of the pH value and the content of the trehalose and the result is accurate and reliable.

The invention discloses an on-line ore pulp pH meter, which comprises three parts, namely a measuring electrode, an amplifier and an intelligent instrument. The measuring electrode comprises a measuring head on which a metal electrode is arranged; the surface of the metal electrode is provided with a scraper component which comprises a scraper head; the scraper head is provided with a scraper blade which contacts the surface of the metal electrode and is compressed on the surface of the metal electrode through a spring; and the scraper blade is driven by a driving device to rotate on the surface of the metal electrode, so as to scrape and wash the surface of the metal electrode. The amplifier is arranged in the measuring electrode, and a pH signal generated by the measuring electrode is converted into a digital signal by the amplifier to communicate with the intelligent instrument. The on-line ore pulp pH meter has the advantages of high reliability and long service life, can be applied under harsh working conditions, and can be arranged on a container such as an ore pulp stirring groove, a reaction tank, an open channel or a pipeline and the like to achieve continuous on-line measurement of pH value of a solution to be measured.

The invention relates to an internal cold water quality monitoring control system applicable to a power generator with a stator bar made from red copper. The traditional domestic and overseas internal cold water quality adjusting devices all have problems of large water quality fluctuation and poor safety due to the use of alkali adding systems using a single-point control method. According to the invention, two paths of sampling points are arranged on a water inlet mother pipe and a water return mother pipe of a stator cooling water tank; an online pH meter and an online conductivity meter are mounted on each path of sampling points; the pH meter, the conductivity meter and a stator cooling water pump in the internal cold water system are connected with a PLC (Programmable Logic Controller) controller by signal wires; the PLC controller is embedded with a PID (Proportion Integration Differentiation) control algorithm program applicable to the internal cold water system and based on expert control rules; and the PID control algorithm program is used for processing the collected real-time data according to set rules and controlling the starting and stopping of an alkali adding metering pump according to an operation result. By using the multi-point control method provided by the invention, more complete interlocked protective function is realized, the excessive adding of the alkali liquor is completely eliminated and the safety of the internal cold water system is assured.

A waterproof pH meter includes a main unit, a probe, which includes a probe electrode and a signal processing circuit, and a waterproof signal transmission line electrically coupled between a main circuit in the main unit and the signal processing circuit of the probe. When measuring a solution, a potential signal generated by the probe electrode is amplified by the signal processing circuit and then transmitted to the main unit through the waterproof signal transmission line for reading by the user. As the design has a better capacity in bearing noise interference, the signal transmission line can be selected from a regular waterproof cable instead of a BNC material.

The invention relates to a method for leaching germanium in zinc oxide smoke through ultrasonic reinforcement. The method comprises the following steps: adding the zinc oxide smoke dust into a leaching tank filled with a sulfuric acid solution, stirring and leaching for 1-5 minutes at the temperature of 50-80 DEG C to obtain a leaching system A, and monitoring the pH value of the system in the leaching tank through a pH meter in the leaching process; the leaching system A in the leaching tank is subjected to ultrasonic enhanced agitation leaching for 19-39 min through an ultrasonic vibration plate, and the pH value of the system in the leaching tank is monitored through a pH meter in the leaching process; after a pH meter monitors that the pH value of a system in the leaching tank is smaller than 3, a reducing agent is automatically added through a batching pump at the temperature of 50-80 DEG C, then ultrasonic enhanced reduction leaching is conducted for 5-15 min, solid-liquid separation is conducted to obtain leachate and leaching residues, germanium is extracted from the leachate, and the leaching residues are returned to a lead smelting system. According to the method, the germanium in the smoke dust can be efficiently extracted under the condition of low acid consumption, the leaching rate of the germanium reaches 93%, and accumulation of the germanium in a system is reduced.

The embodiment of the invention discloses a pH value measuring method. The pH value measuring method comprises the following steps: simultaneously measuring pH values in three positions in a reaction kettle; judging whether a first pH value is unavailable according to the difference between the first pH value and a second pH value as well as the difference between the first pH value and a third pH value, wherein when the first pH value is available, the average value of the three pH values is taken as the pH value of a solution in the reaction kettle, and when the first pH value is not available, the average value of the second pH value and the third pH value is taken as the pH value of the solution in the reaction kettle. According to the pH value measuring method provided by the embodiment of the invention, when a certain pH meter malfunctions, the fault can be timely found, and the pH value measured by the malfunctioned pH meter is removed when the pH value of the solution in the reaction kettle is calculated, so that the measurement accuracy of the pH value of the solution in the reaction kettle is improved, and the control errors of the pH value of the solution are reduced in a production process. The application further discloses a pH value measuring device.

The invention relates to a device for simulating motion transfer of charcoal in a soil system, which comprises an original pool, a water pump, a pH equalizing tank, a stirring device, a simulated soil column and an automatic part collector. The original pool comprises a solution injection bottle and a conduit; the pH equalizing tank comprises a pH electrode, a pH meter, charcoal particles; the stirring device comprises a magneton and the stirring device; valves are arranged at upper and lower ends of the simulated soil column, an air outlet is arranged at top, a silica gel pad is arranged in flange plates at upper and lower ends, the porous filter panels are respectively placed at upper and lower position of a filling medium; the automatic part collector comprises an outlet pipe, a timing rotating disk and a liquid outlet collection container; a water inlet of the pH equalizing tank is connected to the original pool, the water inlet of the stirring device is connected to the water outlet of the pH equalizing tank, the water inlet of the simulated soil column is connected to the water outlet of the stirring device, and the water outlet of the simulated soil column is connected to the automatic part collector. The device for simulating motion transfer of charcoal enables real-time acquisition of distribution condition of charcoal concentration on time and space as well as real-time change of output liquid volume, and has the characteristics of high automation degree, high accuracy, less volume of experiment apparatus, less interference factor and easily controlled condition.

The invention discloses a concentration-rectification optimized production system for concentrating 27.5% hydrogen peroxide dilute solution into 50% hydrogen peroxide thick solution and a method thereof. The concentration-rectification optimized production system comprises jars of 27.5% hydrogen peroxide dilute solution pumped with a hydrogen peroxide dilute concentrating stabilizer, 50% hydrogen peroxide product pumped with a hydrogen peroxide stabilizer and chemical-grade product pumped with the hydrogen peroxide stabilizer, wherein outputs of the jars are all conveyed to the pipeline of an evaporator for application according to the invention; gas out of the top of a rectifying tower is mixed with gas pumped out of the shell of the evaporator and then the mixed gas passes through a tail gas condenser; after being cooled, the mixed gas enters a vacuum pump package via a gas-liquid mixed separation tank; and a desalted water acidity adjusting device and a pH meter online monitoring device are additionally arranged in the process of conveying desalted water to a reflux liquid tank from a desalted water station; therefore, controllable production safety of the system is guaranteed. According to the invention, the requirement of the system for the water quality of the desalted water in the production process and in emergency is met; and the system has the advantages of high product yield, low device investment, stable guarantee of product quality, low energy consumption and low product storage risk.

Voltammetric sensors prepared from composite materials and optionally using microfabrication techniques enable detection of analyte in sample volumes under ten microliters.

The invention relates to an intelligent online PH (potential of hydrogen) meter system with an automatic cleaning function, and belongs to the field of PH measuring devices. The intelligent online PH meter system comprises a PH meter measuring system, a water taking system and an ultrasonic cleaning system; the water taking system comprises a filter, a centrifugal pump, water supply pipelines, regulating valves and a hydrophone pool, and the filter is connected with the centrifugal pump by the water supply pipelines; the regulating valves are arranged on the water supply pipelines, one end of each water supply pipeline is positioned in sample water, and the other end of each water supply pipeline is connected with a water inlet end of the hydrophone pool; and the PH meter measuring system comprises a computer, an acquisition board and a PH meter measuring instrument, and a PH detector is disposed on the top of the hydrophone pool and is in transmission connection with the PH meter measuring instrument by a transmission line. The intelligent online PH meter system has the advantages that the PH of water can be monitored and measured in real time, abnormal change of the quality of the water can be reflected timely, pollution sources can be tracked, and the measuring instrument can be cleaned automatically.

The invention discloses a rotaxane molecular machine of naphthalimide crown ether and a pH meter based on the molecular machine. Structural formula of the molecular machine is represented as a formula (I) as shown in the specification. The pH meter includes a gold electrode and the rotaxane molecular machine of the naphthalimide crown ether which is adsorbed on the surface of the gold electrode to form a self-assembled monolayer. The synthesized rotaxane molecular machine of the naphthalimide crown ether is bonded with the gold electrode through a disulfide bond, to result in transfer of the molecular machine and charges on the gold electrode in a process of adding acid or alkali, thus achieving online rapid monitoring of pH value; the molecular machine can avoid accumulation of waste generated from the whole monitoring process on the monolayer, thus enhancing detection limit, sensitivity and fatigue resistance.

The invention discloses a novel pH (Potential of Hydrogen) meter which comprises a sensor, wherein a bracket is arranged on the sensor, and connected with a measuring electrode; an object placing platform, an LED (Light-emitting Diode) display screen and a function selection area are arranged on the sensor; the object placing platform is circular; a weighing switching button and a temperature adjustment and control area are arranged on the function selection area; and a switch is arranged on one side of the temperature adjustment and control area. The novel pH meter is simple in structure, convenient to use, exquisite in appearance, long in service life, simple and direct to operate, and convenient to popularize and use, and is applicable to different scopes; an electromagnetic oven is endowed with a new function, so that a cooking mode can be adjusted more quickly, conveniently and freely during cooking; and a timing module is adopted, so that the pH meter can be used more friendly.

The invention discloses a device for measuring the density and the pH value of slurry. The device comprises an air sampling pipe component, a densitometer, a first pH meter and a second pH meter, wherein the air sampling pipe component comprises a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe and a fifth branch pipe; the lower end of the first branch pipe is connected with the lower end of an absorption tower; the first pH meter is inserted into the first branch pipe; the second branch pipe is horizontally communicated with the first branch pipe; the free end of the second branch pipe is connected with a flushing water pipe; the upper end and lower end of the third branch pipe are respectively communicated with the lower ends of the first branch pipe and the densitometer; the upper end of the densitometer is communicated with the lower end of the fourth branch pipe; the second pH meter is inserted into the fourth branch pipe; the fifth branch pipe is vertically communicated with the fourth branch pipe; and the central lines of the third branch pipe, the fourth branch pipe and the densitometer are positioned on the same straight line and are parallel to the wall of the absorption tower. The device for measuring the density and the pH value of slurry can prolong the service life of the densitometer and the pH meters and reduce the maintenance workload of field equipment.

The invention discloses a method for rapidly detecting low-concentration boric acid in an aqueous solution. The method comprises the following steps: respectively preparing a boric acid standard solution and a reaction reagent standard solution; mixing the boric acid standard solution with the reaction reagent standard solution, detecting the pH value of the obtained mixed solution, and drawing astandard working curve of a relationship between the pH value and the mass of boric acid; and detecting the pH value of a solution obtained after mixing a boric acid solution sample to be detected with the reaction reagent standard solution, and calculating the mass of the boric acid in the boric acid solution sample to be detected according to the standard working curve. The method has the advantages of simplicity in operation, short reaction time, low cost, high accuracy, and large measurable concentration range of boric acid.

The invention discloses a method for absorbing and fixing carbon dioxide by using spirulina, and belongs to the technical field of biology. According to the method, sealed photobioreactors are connected in series. Each photobioreactor is connected to a pH meter and a peristaltic pump, wherein a pH probe of the pH meter is soaked in a spirulina liquid contained in the photobioreactor and used for continuously detecting the pH value of the spirulina liquid, and the other end of the pH meter is connected to a switch of the peristaltic pump through a signal line. One end of the peristaltic pump isconnected to an alkaline solution storage container via a silica gel pipe, and the other end enters the spirulina liquid located inside the photobioreactor via a silica gel pipe. The peristaltic pumpcan convey an alkaline solution from the storage container to the photobioreactor, so that the pH value of the spirulina liquid is raised. When the pH value of the spirulina liquid reaches 11.0 or higher, the pH meter controls the switch of the peristaltic pump to be automatically off, so that the peristaltic pump stops conveying the alkaline solution from the storage container to the photobioreactor. According to the method, a large amount of carbon dioxide in the air can be absorbed and fixed. The method is also suitable for other spirulina varieties and basophilia microalgae varieties.

The invention relates to a flue gas desulfurization pH measurement device, and belongs to the technical field of environmental protection in flue gas desulfurization. The flue gas desulfurization pH measurement device comprises a desulfurization absorption tower, a pH meter installation tank, wherein the desulfurization absorption tower is connected with the pH meter installation tank through a sampling pipeline; the pH meter installation tank is provided with a flushing opening and two pH meter connection openings and connected with a flushing pipeline through the flushing opening; two pH meters are arranged through the pH meter connection openings; a liquid inlet is formed in the middle and lower part of the side wall of the pH meter installation tank and the pH meter installation tank is connected with the sampling pipeline through the liquid inlet; a liquid outlet is formed in the middle and upper part of the pH meter installation tank and the pH meter installation tank is connected with a liquid discharge pipeline through the liquid outlet; slurry is discharged to a desulfurization island trench through the liquid discharge pipeline; a drain outlet is formed at the bottom of the side wall of the pH meter installation tank; and two baffle plates are fixed in the pH meter installation tank from top to bottom. The pressure of long-term running of a gypsum discharge pump system is relieved, the energy consumption is reduced, the equipment abrasion is reduced and the service life of equipment is prolonged.

The invention provides a small evaluation apparatus for the activity of a catalyst. The small evaluation apparatus comprises a catalytic reaction zone and a reaction control zone. The catalytic reaction zone comprises a reaction zone shell, a base support, a photocatalytic excitation light source, an aeration head, an aeration pipe, a liquidometer, a catalyst adding opening, an acid / alkali adding opening, a water inlet and a sampling opening; and the reaction control zone comprises a switch, a light intensity controller, a temperature controller, a magnetic agitation speed controller, an air flow meter and a pH meter. Catalytic reaction conditions are set by adjusting each controller in the reaction control zone; the catalyst and a simulation and evaluation catalysis liquid are fully mixed under the action of aeration air-flow or magnetic stirring so as to form a suspension system; and the suspension system can select dark catalytic reaction or light-catalyzed reaction according to the characteristics of catalytic reaction. According to results of the catalytic reaction of the simulation and evaluation catalysis liquid, the activity of the catalyst can be effectively evaluated and a high-activity catalyst can be screened. The small evaluation apparatus provided by the invention has the advantages of portability, small size, easiness in operation, conservation of time and energy, and high efficiency.

The invention relates to a flower planting soil parameter detection device with adjustable detection positions. The flower planting soil parameter detection device comprises a soil nutrient tester, a pH (potential of hydrogen) meter and a controller, the soil nutrient tester is used for detecting soil nutrient valves, the pH meter is used for detecting soil pH values, the controller comprises a sampling control module and a data processing module, the sampling control module is used for controlling working conditions of the soil nutrient tester and the pH meter, the data processing module is used for analyzing the soil nutrient values and the soil pH values, the controller is connected with a parameter setting module for setting sampling time and sampling depth, the soil nutrient tester and the pH meter are arranged on a removable soil detection probe, and the sampling control module is connected with a driving device for driving the soil detection probe to bilaterally move. The sampling time and the sampling depth are set, so that the soil nutrient values and the pH values are more controllable and accurate, and flower growing soil conditions are more effectively mastered.

The invention discloses a pH meter for water quality detection, which comprises a main machine, a metering electrode, a temperature probe, an electric wire, and a calibration potentiometer. The metering electrode and the temperature probe are electrically connected to the main machine through the electric wire; the calibration potentiometer is installed in the main machine; a groove is formed in the metering electrode; a rubber sheath is installed on the upper end of the metering electrode; a plastic shell is arranged on the lower end of the metering electrode; a liquid crystal display screen is installed on the main machine; a transversal rod is installed on one side of the main machine, where two vertical rods are fixed to the middle of the transversal rod; a sleeve ring is arranged on the end of the transversal rod, wherein the diameter of the sleeve ring is larger than the diameter of the metering electrode and is smaller than the diameter of the plastic shell. The pH meter is convenient to use, has compact structure and is high in measurement precision.

The invention discloses a method and system for directly recycling red mud alkali. The method comprises the following steps that: (1) red mud is leached with alkaline circulating water as leaching water, and the pH or conductivity of a leacheate is detected; (2) evaporation and concentration are performed when the pH or concentration of the leacheate is relatively high; (3) when the pH or concentration of the leachate is small, the leachate is used as alkaline circulating water, and fresh water is used as leaching water to leach the red mud; and (4) leaching is stopped when the pH value of theleachate reaches a set value. The system comprises a leaching pool; leaching spray heads are distributed at the top of the leaching pool; each spray head is connected with an alkaline circulating water storage tank and a condensate water storage tank through liquid conveying pipes; a pH meter is arranged at the liquid outlet of the leaching pool and is connected with a high-pH leachate storage tank and the alkaline circulating water storage tank through liquid inlet valves; the liquid outlet of the high-pH leachate storage tank is connected with an MVR evaporator; and the MVR evaporator is connected with a condensate water storage tank and a second evaporator. Additional components are not needed. The method and system have the advantages of simple treatment process, high treatment efficiency, good effect, and low cost.

Voltammetric sensors prepared from composite materials and optionally using microfabrication techniques enable detection of analyte in sample volumes under ten microliters.

The invention discloses an on-line pH (Potential of Hydrogen) value sampling measurement device for a slurry material, belonging to the technical field of sampling measurement. A pH meter is fixedly arranged in a measuring cavity through a fixed pin and is connected with an intelligent instrument; a filtrate pH signal measured by the pH meter is converted into an electric signal, and the electric signal is amplified and output to the intelligent instrument to display a pH value; an opening in the lower part of the measuring cavity is fixed with a keel frame through a fixed flange; a side wall of the keel frame is provided with a hole; filter cloth is fixedly arranged outside the keel frame through a fixing component; the fixing component comprises a fixing forage and a fastening pin; an electric vacuum extraction valve and an electric compressed air valve are arranged on the measuring cavity; and opening and closing of the electric vacuum extraction valve and the electric compressed air valve are controlled by an intelligent time relay. After long-term use, the problem of scaling is not caused on an electrode head of the pH meter, the measuring accuracy of the pH meter is kept at a higher level all the time, the service life of the pH meter is long, and the entire device can operate stably for a long time.

An apparatus has a platinum group metal carrying resin column provided in a supply line of ultrapure water, and has a pH adjuster injection device and a redox potential adjuster injection device provided in a later stage thereof. The apparatus has a membrane-type deaeration apparatus and a gas dissolving membrane apparatus sequentially provided in a later stage of the devices, and a discharge line communicates with the gas dissolving membrane apparatus. A pH meter and an ORP meter are each provided at some midpoint in the discharge line, and the pH meter and the ORP meter are connected to a control device. Then, the control device controls the amount of adjusters to be injected from the pH adjuster injection device and the redox potential adjuster injection device, on the basis of the measurement results of the pH meter and the ORP meter.

The invention discloses an anti-scaling system and method for a wet deslagging system of a thermal power plant. The anti-scaling system comprises a controller, a fine treatment regeneration system, afirst online pH meter, a fine treatment regeneration acidic wastewater delivery valve, a fine treatment regeneration alkaline wastewater delivery valve, a chemical regeneration system, a second onlinepH meter, a chemical regeneration acidic wastewater delivery valve, a chemical regeneration alkaline wastewater delivery valve, a desulfurization system, a slag removal system water replenishing tank, a slag removal system water replenishing tank delivery pump, a slag conveyor, a boiler, a slag overflow tank, a concentration tank, a clean water tank and a third online pH meter, According to the system and the method, the scaling problem of pipelines and equipment of the wet deslagging system can be prevented and the disposal problem of regenerated wastewater of the whole plant can be solved and the cost is low.