75 results about "Plain water" patented technology

A compressed air / foam fire fighting system which is sufficiently compact to be carried on the bed of a pick-up truck includes a water tank, a pump for providing water at substantial pressure to a water conduit, an engine for driving the pump, a foam reservoir including a bladder tank connected to the pump, an air compressor, an engine for driving the air compressor, a differential pressure valve connected in the water conduit, a metering valve adjustable to supply a desired proportion of foam concentrate to water connected across the differential pressure valve, an air valve for controlling the amount of air from said compressor, and an air injection venturi for mixing air into a water / foam concentrate. A two-way valve connected between the tank and the pump is movable between a first position where water is pumped from the water tank and a second or suction position where water is drawn from an outside tank or other source. The system can supply plain water, a water / foam mixture, a mixture of compressed air, water, and foam, or compressed air only.

A Personal Care Vaporizer Device for the Eye Area of the Face. A treatment chamber formed within the device will encircle the user's eyes and surrounding facial area when the device is positioned over the eye area of the face. A soft gel eyemask element provides maximum comfort for the wearer during treatment. The device introduces therapeutic mist or vapor into the treatment chamber. The mist / vapor is generated from an internal reservoir containing plain water or water mixed with other therapeutic additives. An onboard blower can control the flow rate of the mist / vapor into the treatment chamber. One or more onboard heating elements within the device provide direct heat to the treatment chamber wall(s), and / or to heat the mist / vapor prior to its being introduced into the treatment chamber. Onboard vibration generators apply soothing massaging motion to the user's face when activated.

An analysis element for use in a blood test method enabling easy and simple operations that are performed quickly up to measurement, an analysis element for use in a blood test method that operations up to the measurement for many components can be quickly performed, and that is safe and has a sufficient measurement accuracy thereof, and an analysis element for use in a test method using body fluids and urines of humans and animals, plain water, seawater, soil extract, agricultural products, marine products, processed-food extracts, and liquid for use in scientific research as specimens, are provided, the present invention relates to a multi-component measurement dry analysis element for use in a method for testing a specimen, the method using an area sensor as a detector to obtain a result of measurement according to information represented by 1000 pixels or more per one component, and to perform simultaneous measurements of plural components.

The invention provides an EBM method for zero drainage treatment of dyeing wastewater. The method comprises that: step 1, a centrifuge dripping counter current washing process is carried out in a dyeing rinsing process; step 2, dyeing initial wastewater is subjected to standard-reaching treatment, step 2a, primary electro-oxidation is carried out, comprising micro-electrolysis, electro-oxidation, Fenton action and microwave, step 2b, biochemical treatment is carried out, comprising time delay anaerobism and short time aerobism, and superior bacteria is added in the same time, and step 2c, secondary electro-oxidation is carried out again after the biochemical treatment, comprising electrolytic flocculation, electric de-colorization and electro-oxidation; step 3, standard-reaching drainage water is subjected to deep purification treatment, which is to enter an electric desalination film system for treatment, plain water flows out after the standard-reaching drainage water is subjected to sand leach, fiber filtration, electric desalination and RO film in sequence, and can be recycled, and high concentrated water flows out from electric desalination. The treatment method saves water and energy, reduces COD drainage of the dyeing wastewater, and improves the de-colorization rate, the turbidity and the removal rate of ammonia nitrogen.

The invention relates to a process for producing potassium chloride by using carnallite. The process comprises the steps: S1. flotation: subjecting the carnallite to flotation treatment, so as to prepare low-sodium carnallite; S2. crystallization: adding isometric plain water into a first-section crystallizer and a second-section crystallizer, adding 55% to 75% of the low-sodium carnallite into the first-section crystallizer, adding 25% to 45% of the low-sodium carnallite into the second-section crystallizer, conveying underflow slurry formed in the first-section crystallizer into the second-section crystallizer for continuous decomposed crystallization, and carrying out decomposition in the second-section crystallizer, so as to form coarse-potassium slurry; S3. aftertreatment: subjectingthe coarse-potassium slurry to subsequent treatment, thereby preparing the product potassium chloride. According to the process for producing the potassium chloride by using the carnallite, provided by the invention, the low-sodium carnallite subjected to flotation is subjected to crystallizing treatment by connecting two sections of crystallizers in series, so that the complete decomposition of the low-sodium carnallite in a crystallization process is guaranteed, the content of potassium chloride in overflow liquor during crystallization is fundamentally lowered, and thus, the yield of the potassium chloride is increased to 75% or more.

Tunable down-hole stimulation systems feature closed-loop control of pumps and tunable down-hole stimulators. Stimulators generate and hydraulically transmit broad vibration spectra tuned for resonance excitation and fracturing of geologic materials adjacent to the wellbore. Feedback data for controlling stimulation includes backscatter vibration originating in stimulated geologic material and detected at the stimulator(s). For initial fracturing with relatively large particle sizes, the power spectral density (PSD) of each stimulator output is down-shifted toward the lower resonant frequencies of large particles. As fracturing proceeds to smaller (proppant-sized) fragments having higher resonant frequencies, backscatter vibration guides progressive up-shifting of stimulator PSD to higher vibration frequencies. Stimulator power requirements are minimized by concentrating vibration energy efficiently in frequency bands to which geologic materials are most sensitive at every stage of stimulation. Geologic fragmentation efficiency is thus optimized, with inherent potential for plain-water fracs completed with self-generated proppant.

Tunable down-hole stimulation arrays feature closed-loop control of spatial arrays comprising several connected stimulators. Each stimulator is responsive to a timed activation signal. Stimulators periodically transmit bursts comprising a plurality of vibration frequencies, each burst having an adjustable power spectral density (PSD) that is tunable via an adjustable rebound cycle time. Rebound cycle times also affect vibration interference among array stimulators, while simultaneous or sequential timed activation signals from a programmable controller affect directional propagation of combined vibration wave fronts from an array. Stimulator PSD's are adjusted for resonance excitation and fracturing of adjacent geologic materials. Closed-loop feedback control incorporates backscatter vibration from stimulated geologic material. As fracturing proceeds to smaller (proppant-sized) fragments having higher resonant frequencies, PSD's are up-shifted, increasing relative power in higher vibration frequencies. Progressive geologic stimulation is optimized, with inherent potential for plain-water fracs completed with self-generated proppant.

The invention discloses a treatment technology for sugarcane mixed clear juice, and in particular relates to a membrane method for treating the sugarcane mixed clear juice. The method comprises the following steps of: filtering the mixed clear juice through a first stage ultrafiltration membrane; filtering the obtained clear liquor through a second stage ultrafiltration membrane; evaporating the strong liquor filtered by the first stage ultrafiltration membrane for preparing sugar; mixing the mixed clear juice and the strong liquor filtered by the second stage ultrafiltration membrane and filtering by the first stage ultrafiltration membrane; and concentrating the thin liquor filtered by the second stage ultrafiltration membrane by a membrane concentration device so as to obtain a concentrated solution and plain water, wherein the molecular weight cutoff of the first stage ultrafiltration membrane is 50000-100000 Dalton, and the molecular weight cutoff of the second stage ultrafiltration membrane is 1000-20000 Dalton. The method has the advantages that the energy consumption can be greatly lowered, the equipment has low operating cost and long service life, the quality of the product is improved sharply, the degree of automation is higher and the method is more environment-friendly.

The invention relates to an industrial sewage treatment system and a sewage treatment method. The industrial sewage treatment system comprises a regulation pool which is used for collecting sewage, wherein a pretreatment system which mainly comprises a V-shaped filter tank is connected behind the regulation pool, and a first-stage ultrafiltration and reverse osmosis system is connected behind the pretreatment system. The industrial sewage treatment system is characterized in that behind a reverse osmosis unit in the first-stage ultrafiltration and reverse osmosis system, reverse osmosis concentrated water of one path enters an at-least-one-stage frequent-reverse-pole electrodialysis system connected with the path and is subjected to concentration, and plain water of another path is connected with a recycled water pool or communicated with a recycled plain water outlet pipe of the recycled water pool; and a concentrated water outlet behind the frequent-reverse-pole electrodialysis system is connected to a monovalent-bivalent-separation electrodialysis system which can be used for separating monovalent salt and bivalent salt, an MVR evaporation device which is used for concentrating and recovering the monovalent salt so as to obtain crystallized sodium chloride is connected behind the monovalent-bivalent-separation electrodialysis system, a plain water outlet behind the monovalent-bivalent-separation electrodialysis system is connected with an at-least-another-stage frequent-reverse-pole electrodialysis system, a plain water outlet behind the frequent-reverse-pole electrodialysis system is connected with the recycled water pool, and a concentrated water outlet behind the frequent-reverse-pole electrodialysis system is connected with another MVR evaporation device which can be used for obtaining sodium sulfate crystal salt.

A squeegee device having an integrated scraper blade, which includes a removable and telescoping / extendable handle pivotably connected to a squeegee head for motion of the device between squeegee position, wherein the handle is generally orthogonal to the head for facilitating cleaning windshields and windows, and a storage configuration, wherein the handle and head are generally parallel and the head can be disposed and sealed entirely within a portable container which includes an integrated reservoir which holds a supply of aqueous cleaning solution. The device can be used in conjunction with instant glass cleaner tablets which dissolve in plain water within the integrated reservoir to make an aqueous cleaning solution, and includes an integrated removable tray which stores a supply of cleaner tablets within the container. The device also features an integrated shield which serves to protect the user's hand and arm from becoming wet / soiled from aqueous solution and / or debris which might otherwise run unimpeded down the handle or fall from the squeegee head while the squeegee is being carried and / or used.

The invention discloses a high density microalgae culture method in membrane photobioreactor using municipal wastewater, belonging to the technical field of environment engineering and microalgae culture. In the method, municipal wastewater is added into the membrane photobioreactor, the algae cell is transplanted in a reactor, to achieve the purpose of culturing microalgae, and to achieve the culture effect of Zarrouk substrate at a basic level; the method reduces use of chemical medicines and plain water, and lowers the production cost of microalgae. Through filtration of the membrane components, the algae cell is entrapped in the reactor, high intensity culture is thus achieved; meanwhile the discharge of treated wastewater also achieves the treatment purpose of wastewater. In the process of microalgae culture, the method is able to save water resources and nutrition salt, the cost of microalgae culture is lowered, at the same time the wastewater is purified.

The invention discloses a method and a device for making drinking water by coal mine water, which relates to a waste water processing method and device. The method orderly comprises the following steps: a) causing raw coal mine water to flow through a clarifier added with CaCl2; b) pumping outlet water of the clarifier and coagulant into a manganese ore filter; c) carrying out the ultrafiltration on the outlet water of the manganese ore filter; and d) processing the nanofiltration plain water after the ultrafiltration. The device comprises a pipeline, wherein the clarifier, an inclined pipe sedimentation tank, a raw water tank, a booster pump, the manganese ore filter, an active carbon filter, a precision filter, an ultrafilter, a high-pressure pump, a nanofilter, a drinking water tank, a ultraviolet sterilization lamp and a microporus filter are orderly arranged from a water inlet end to a water outlet end of the pipeline, and the concentrated water outlet ends of the ultrafilter and the nanofilter are respectively provided with backflow pipelines connected with the clarifier. According to the method and the device, metal salt such as iron, manganese and the like exceeding the standard as well as fluoride, sulphate and the like can be removed, and thus the fresh water recovering rate is enhanced to the maximum extent.

A modular diluent changeover manifold for beverage dispensers provides quick and convenient changeover of supply of two different beverage liquid diluents to post-mix beverage dispensing valves. The diluent changeover manifold is mounted within a beverage dispenser behind a beverage valve mounting panel. The modular changeover manifold and valve assembly, when assembled, consists of a pair of diluent tubes and a plurality of changeover valves. Each changeover valve has an outlet fluidly connected to an associated one of the beverage dispensing valves and each tube supplies a different diluent, such as plain water and carbonated water, to one of two inlets to each changeover valve. The changeover valves are individually manually manipulateable to deliver to their associated beverage valves either the diluent from the first tube or the diluent from the second tube.

The invention refers to plain water supplying method for rain water and ground water resources; it selects a impounded area, and rig flooding well from one to one hundred of millions on the area, there sets a filter at the water entrance of the well; when meeting with moderate rain or heavy rain, storm rainfall or supergiant storm rainfall, the rain water is poured into the well through the filter directly, and afflux into ground water, thus the water impounded area will has rich ground water. The rain water turns into ground water, and the ground water is turned into plain water. The ground water can be used for edible water through simple process, or uses hyperfiltration technology to decrease the salinity of ground water. And it can supply plain water in drought years. The cost of ground is decreased, and the price of ground water can be decreased from 5-10 yuan per ton to 2-4 yuan per ton.

The invention discloses an ecological water permeable pavement. The ecological water permeable pavement comprises a water permeable surface layer, a plain water permeable concrete base layer and a broken stone cushion layer which are distributed in sequence from top to bottom, wherein the water permeable surface layer is made from a water permeable concrete mixture. The ecological water permeable pavement allows rainwater to infiltrate back to underground through original runoffs on the ground, underground water can be effectively restored and supplemented, underground ecological system balance is maintained, and the rainwater directly infiltrates into soil at the lower part through water permeable runoffs of the water permeable pavement, so that water discharge pressure of an urban pipeline network is reduced while the rainwater is filtered and purified by a soil layer in an infiltration process, and pollution of natural water such as rivers, lakes and seas due to pavement water is reduced; and the water permeable pavement adopts a porous structure, can effectively absorb all kinds of noise of automobiles, motorcycles and environment outside traffic, effectively ameliorates urban noise pollution and is ecological and environment-friendly.

The present invention relates to a computational tool that allows to evaluate the degradation of cement-based materials under various types of chemical attacks such as sulfates, chlorides, and plain water. It is based on the physical principles of ionic mass conservation and chemical equilibrium between a solution and different solid phases. The effect of the dissolution or the precipitation of solid phases on the transport coefficients is considered. A method for determining an ion concentration in solution of at least two ions capable of undergoing transport in a cement-based material under a chemical attack and a solid phase profile for at least one component of said cement-based material is provided. A method for determining a diffusion coefficient for each of at least two ions capable of undergoing transport in a cement-based material is also provided.

The invention relates to a resource-converting utilization method for desulfuration wastewater. The method comprises the steps: converting saline matters in the desulfuration wastewater into sodium chloride, and meanwhile, obtaining light salt brine containing organic matters; removing organic matter impurities from the light salt brine, and then, concentrating the light salt brine so as to prepare electrolytic brine; and recycling plain water obtained after membrane separation as fresh water. The method has the advantages that the desulfuration wastewater is applied as a resource, and three kinds of products, i.e., alkali, ferric chloride and water are obtained while the wastewater is treated, so that the method has very good economic, environmental and social benefits. By the popularization and application of the method, the bottleneck problem, i.e., wastewater pollution of a desulfuration wastewater production process can be thoroughly solved.

The invention provides a low-carbon ecological urban road space parking lot. The parking lot is erected above the motor vehicle road and is a parking shed, including support columns, a parking floor and a green top floor. The parking floor is connected with a two-way vehicle ramp. Vehicles enter the ramp from the motor vehicle road, and then enter the parking space on the parking floor. The green top layer of the parking lot is an ecological board. Ordinary flexible waterproof layer, root-blocking waterproof layer, isolation layer, 40mm thick fine stone mortar concrete protection layer, drainage board, water filter cotton, Baoshui element, Bao green element and plants. The present invention is also provided with a pedestrian escalator and an escalator leading to the ecological board. In addition to planting grass and greening on the ecological board, flower seats, courts, and leisure facilities are arranged on the ecological board according to needs and space size, so as to facilitate residents' recreational activities. The invention is a multifunctional ecological parking lot integrating social, ecological and economic benefits.

The invention relates to the technical field of the hydrographic engineering, in particular to a plain area water system characteristic evaluation method based on an ArcGIS (Geographic Information System). The plain area water system characteristic evaluation method comprises the following steps: 1) scanning a paper topographic map, and obtaining a picture with a geographic coordinate system and a projection; 2) carrying out water system classification on the picture obtained in the step 1), and independently digitizing each level of water system to obtain a digital plain river network map; 3) according to a water system structure characteristic index, endowing a water system characteristic parameter of the water system structure characteristic of the digital plain river network map; and 4) according to the digital plain river network map obtained in the step 2) and the water system characteristic parameter obtained in the step 3, carrying out comprehensive evaluation on the plain water system. The plain area water system characteristic evaluation method has the beneficial effects that the water system characteristics and the hydrographic characteristics of a plain river network are comprehensively and systematically expressed through five indexes. Compared with a traditional complex and repeated index, the evaluation method is more systematic and scientific.

A Personal Care Vaporizer Device for the Eye Area of the Face. A treatment chamber formed within the device will encircle the user's eyes and surrounding facial area when the device is positioned over the eye area of the face. A soft gel eyemask element provides maximum comfort for the wearer during treatment. The device introduces therapeutic mist or vapor into the treatment chamber. The mist / vapor is generated from an internal reservoir containing plain water or water mixed with other therapeutic additives. An onboard blower can control the flow rate of the mist / vapor into the treatment chamber. One or more onboard heating elements within the device provide direct heat to the treatment chamber wall(s), and / or to heat the mist / vapor prior to its being introduced into the treatment chamber. Onboard vibration generators apply soothing massaging motion to the user's face when activated.

The invention discloses a humidification and condensation integrating device and a sea water desalinization method thereof, and relates to the field of sea water desalinization. The integrating devicecomprises a shell, an air inlet, an air outlet, a humidifying chamber, a condensing chamber and a water storage chamber, wherein the humidifying chamber is connected with the air inlet, a clapboard provided with a hole is arranged between the humidifying chamber and the water storage chamber, the humidifying chamber is internally provided with a humidifying module, and a spraying device is positioned above the humidifying module; and the condensing chamber is internally provided with a condenser, and a water receiving basin is arranged under the condenser. The humidification and condensationintegrating device is simple in structure, small in volume and convenient for maintenance, can normally run under the normal pressure, has low requirements for equipment and running, can be combined with solar energy heat source or waste heat source, and requires low investment at the early stage, thus having wide market prospect. The sea water desalinization method utilizes sea water or brackishwater to spray to humidify the air in a strengthening way, and then cools the air for reducing the temperature to separate out and obtain plain water from the air, so that the whole process is simplein flow and convenient for operation.

The invention discloses a solar air water-collecting device. The solar air water-collecting device comprises a condenser, a refrigerating mechanism and an air heating mechanism, wherein the condenser is used for condensing water in air. The inlet of the condenser is connected with the outlet of the refrigerating mechanism through a pipeline, the outlet of the condenser is connected with the inlet of the refrigerating mechanism through a pipeline, and the air heating mechanism is arranged beside the condenser. The condenser is a heat exchanging plate which at least comprises a bottom plate and a surface plate, a heat exchanging cavity is sealed between the bottom plate and the surface plate, and a plurality of bonding parts attached to the inner surface of the bottom plate and the inner surface of the surface plate are formed in the heat exchanging cavity. The solar air water-collecting device has the advantages that no pollutant is discharged, the solar air water-collecting device is environmentally friendly, energy is saved, almost no operation cost exists, the structure is simple, installation is easy and convenient, the solar air water-collecting device can be widely applied to seaside buildings or offshore platforms and the like to condense water and produce plain water by fully utilizing the temperature difference on the water surface, and the solar air water-collecting device can be used in the arid desert areas to produce plain water.

The invention provides a method for comprehensively treating and utilizing cassava vinasse waste water and industrial sludge. The method includes: pumping original cassava vinasse waste water into an anaerobic fermentation tank to perform whole-tank high-temperature anaerobic treatment so as to produce biogas; concentrating sludge discharged by the anaerobic fermentation tank, then delivering into a plate-and-frame filter press, and filtering with the plate-and-frame filter press to obtain anaerobic sludge and filtered clear liquid; using a precision filter to perform multistage purification on the filtered clear liquid to obtain first-level plain water and concentrated discharge water, processing the first-level plain water with a membrane biological processing device to obtain second-level plain water which can reach the indexes of production water, and recycling the plain water; mixing the obtained concentrated discharge water and anaerobic sludge with other industrial sludge, dewatering with a dewatering machine, and then conveying to a pyrolyzing furnace for pyrolysis so as to produce combustible gas. The method has the advantages that after the cassava vinasse waste water is subjected to anaerobic fermentation to produce the biogas, self-balancing of energy production and power consumption can be achieved, the water produced after the treatment by the precision filter and a membrane biological reactor can be recycled, resource utilization is achieved, and production cost is lowered.

The invention provides a combined heat and power method for a house, which belongs to the technical field of utilization of renewable energy sources. The method comprises the following steps: firstly, a pond is built at a position around the house where irradiation of light is enough; secondly, a well is dug in the yard of the house; thirdly, a heat exchange tube in the well and a heat exchange tube in the pond are communicated; fourthly, a running gradient slope of a solar pond is designed; fifthly, the bottom of the solar pond is provided with an electro-optical system; sixthly, an indoor heat exchanger of the house is arranged; and finally, the heat exchange tube in the well and the heat exchange tube in the pond are communicated, plain water is filled, and a forcible closed cycle is carried out under the action of a timed inline pump. The combined heat and power method for the house has high photoelectric transformation efficiency and low generating cost, and fully saves the area of a photovoltaic cell. If the design of the area of the solar pond is reasonable, the daily power utilization of an independent house can be satisfied.

An air and water / soap concentrate mixing device which creates high quality compressed air foam without restricting the flow of liquid through the apparatus. The device consists of three water / soap concentrate chambers, an air manifold and a central air diffuser tube. Water / soap concentrate flow is increased through the device from the entry chamber (first) thru the acceleration (second) chambers. Upon entering the deceleration (third) chamber, the water / soap concentrate perimeter is laced with pressurized air from the air manifold wrapping the acceleration chamber. At the same time, pressurized air is also diffused and embedded in the center of the water / soap concentrate flow via the air diffuser tube. As the accelerated water / soap concentrate enters the deceleration chamber, the flow is dramatically decreased. This slowing of the water / soap concentrate and the introduction of pressurized air causes a pressure volatility and turbulence inside the deceleration chamber allowing the pressures of the water / soap concentrate and air to equalize and mix creating foam bubbles. The device is also capable of flowing plain water or water / soap concentrate through the device if the pressurized air system or soap injection system is deactivated.

The invention provides a system for utilizing oil field produced wastewater to prepare high-dryness steam for steam flooding. After thick oil produced water is heated through a preheater of the system, the thick oil produced water is drained into a water outlet pipe of a steam-water separator; a circulating pump conveys the thick oil produced water to an evaporator in a pumping mode, the thick oil produced water is heated through the evaporator to form a gas-liquid mixed phase, and the gas-liquid mixed phase enters the steam-water separator to be processed through steam-water separation; thick water formed through separation enters the water outlet pipe of the steam-water separator; steam formed through separation enters a steam compressor, the temperature of the steam is increased, the heated steam is conveyed to the evaporator, and serves as a heat source to enter the evaporator and to conduct heating, the thick oil produced water can evaporate, and the steam cools to form produced plain water; and the produced plain water is heated through a steam-injection boiler system to form the high-dryness steam. The system is low in pretreatment requirement, free of secondary pollution and low in cost, and latent heat energy contained in high-temperature sewage water drained by the steam-injection boiler system can be fully utilized.

The invention discloses an integrated prochloraz production wastewater treatment method. The integrated prochloraz production wastewater treatment method comprises the following steps of adjusting amination section wastewater to be acid to obtain a filter liquor I; adding sodium hydroxide into triethylamine wastewater to separate out triethylamine and to obtain triethylamine residue wastewater; mixing the filter liquor I, the triethylamine residue wastewater, etherification section wastewater and condensation section wastewater, and adjusting the liquid mixture to be acid; adding soluble ferrous salts and hydrogen peroxide into the liquid mixture for oxidizing reaction at 110-130 DEG C; regulating the pH of the oxidized liquid to 8-9, then filtering the liquid to obtain a filter liquor II,regulating the pH of the filter liquor II to 9-11, then uniformly mixing in phosphate and then soluble magnesium salts for precipitation, and performing filtering to obtain a filter liquor III; regulating the pH of the filter liquor III to 6-9, performing electrolysis; evaporating electrolyzed concentrated liquid to recycle inorganic salts; mixing electrolyzed plain water with evaporated distilled water for biochemical treatment. The integrated prochloraz production wastewater treatment method can achieve integrated resource treatment on wastewater from every working section of prochloraz production.

A method for evaluating the property of a reverse osmosis water treatment medicament based on differential pressure comprises the following steps: adding experimental water into a scale inhibitor, taking the mixture as supplied water during the reverse osmosis process, injecting the supplied water into a reverse osmosis module, and separating to produce concentrated water and plain water while continuously measuring and recording the differential pressure between the concentrated water and the supplied water during the process; under the same water quality condition and experimental operation, changing the variety of the added scale inhibitor, and repeating the above process; evaluating the property of the scale inhibitor according to the variation situation of the differential pressure between the concentrated water and the supplied water along with time when different scale inhibitors are adopted. The method is based on an on-line differential pressure gauge with reliable quality and high precision, and can be used for sensitively reflecting the sediment adhering situation of a reverse osmosis device in a real-time manner, so as to further evaluate the property of the reverse osmosis water treatment medicament. Compared with the conventional other evaluation methods, the evaluation method based on the differential pressure is high in precision, excellent in repeatability, quick in evaluation, and simple and convenient in operation, and can be used for comprehensively investigating the scale inhibition property, compatibility and long-term application performance of the reverse osmosis water treatment medicament.