527 results about "Softened water" patented technology

The invention discloses a high-pressure soft water medium treatment and supply system, which belongs to the technical field of seawater desalination treatment, and comprises a multi-dimensional ion detection module for detecting the concentration distribution characteristics of target inhibition ions in original seawater to generate a corresponding coating material selection instruction; the electric field dynamic coupling module captures a termination signal according to the coating material selection instruction; the shock wave generation module starts a main pump to generate fluid shock waves to execute sediment breaking action according to the termination signal; the monitoring module is used for monitoring the finally output softened water ion concentration and reversely calculating the pollution index of the coating surface; and the heat cycle feedback device is used for starting a self-cleaning mode according to the pollution index and transmitting waste heat in the cleaning process to the pump set. The electric field dynamic coupling adsorption and fluid shock wave cooperative treatment technology is adopted, high-efficiency ion capture, dynamic sediment removal and waste heat recycling can be achieved, energy consumption is remarkably reduced, and continuous and stable operation of the system is guaranteed.

The present invention relates to the technical field of boiler drain treatment, and specifically to a headless full thermal deaerator for collecting boiler drain, comprising: a deaerator, a connecting shell and a base, the connecting shell is located outside the deaerator, the base is located at the bottom of the deaerator and the connecting shell, the end of the deaerator away from the deaerator is fixedly connected with a drain inlet pipe, the drain inlet pipe extends to the inside of the deaerator and is fixedly connected with a drain dispersion head, the inside of the drain inlet pipe and one end close to the drain dispersion head is provided with a guide component, the outside of the drain dispersion head is provided with a drain water separation tray, the end of the drain water separation tray away from the drain dispersion head is provided with a softened water pipeline, the end of the connecting shell close to the deaerator is fixedly connected with a sealing component, the connecting shell is connected to the deaerator through the connecting component, and a buffer component is provided inside the base. The beneficial effects of the present invention are: boiler drain is recycled, the deoxidizer and steam are mixed, the steam consumption for deoxidation is reduced, the thermal efficiency of the boiler is improved, and high efficiency and energy saving are achieved.

A molten salt heating direct-flow type wet saturated steam generation system, comprising an evaporation device, a molten salt conveying device, a preheating device, a softened water conveying device, and a dryness adjustment device. The evaporation device is provided with a first heat exchange pipeline and a second heat exchange pipeline; the molten salt conveying device comprises a molten salt conveying apparatus and a molten salt recovery apparatus; the preheating device is provided with a first preheating pipeline, and an outlet of the second heat exchange pipeline is connected to a steam output pipeline; and the dryness adjustment device comprises an adjustment member and a dryness measurement apparatus. According to the steam generation system provided by the present invention, the temperature of softened water and the temperature of molten salt can be adjusted to appropriate ranges, avoiding the crystallization of the molten salt; moreover, the dryness of wet saturated steam can be controlled by means of coarse adjustment and fine adjustment, and the direct-flow type evaporation device is suitable for softened water having poor quality so as to meet the steam injection requirements of oil fields.

The invention discloses an unattended tertiary oil recovery injection allocation system. A produced water treatment module receives oil well produced water, treats the oil well produced water and then provides softened water for a system; the dry powder dispersing, dissolving and curing module is used for mixing polymer dry powder with softened water treated by the produced water treatment module to form a polymer mother solution and curing the polymer mother solution; the liquid medicament storage and feeding module is used for storing, preparing and accurately adding liquid medicaments such as surfactants and bactericides; the mother liquor feeding and watering module conveys the polymer mother liquor to the injection module at a constant pressure, and meanwhile, softened water and a surfactant target solution in a set proportion are doped; the injection module mixes a polymer solution, water and an agent provided by the mother liquor feeding and watering module and then injects the mixture into the stratum at constant pressure; and the monitoring communication module controls the injection allocation system through the PLC. The system has the beneficial effects that the whole production process is automatically operated under the scheduling of the monitoring communication module, the operation state of corresponding equipment can be timely adjusted in case of special situations, the management efficiency is improved, and the maintenance cost is reduced.

The utility model relates to a waste incineration fly ash washing wastewater treatment system, which comprises a raw water tank for collecting fly ash washing wastewater; the heavy metal removal reaction tank is used for removing heavy metals from the wastewater to obtain a mud-water mixture, and carrying out solid-liquid separation on the mud-water mixture to generate heavy-removed water; the hardness removal reaction tank is used for removing calcium and magnesium ions from the heavy water to obtain a mud-water mixture II and carrying out solid-liquid separation to generate softened water and calcium carbonate sludge; the pH adjusting barrel is used for adjusting the pH of the softened water to generate reclaimed water; the COD removal system is used for removing COD in the reclaimed water; the multi-medium filter is used for filtering the COD-removed water to obtain filtered water; the ultrafiltration equipment is used for filtering the filtered water to obtain ultrafiltration permeate liquid; the nanofiltration equipment is used for carrying out nanofiltration on the ultrafiltration permeate liquid, and chlorine salt enters separation membrane permeate liquid; and the evaporative crystallization equipment is used for evaporating and concentrating the separation membrane permeate to generate sodium chloride and potassium chloride. The device disclosed by the utility model can efficiently remove COD (Chemical Oxygen Demand) and heavy metals, reduce calcium ions in washing wastewater and ensure the quality of subsequent evaporative crystallization products.

A fused salt energy storage coupled CO2 air source heat pump water heater cascade energy storage steam supply system comprises a first-stage energy storage system and a second-stage energy storage system, the first-stage energy storage system comprises a softened water tank, and a water inlet of the softened water tank is connected with a water outlet of a softened water treatment device through a water conveying pipeline; a water outlet of the softened water tank is connected with a water inlet of a heated channel of a condenser of the carbon dioxide air source heat pump water heater through a softened water pipe connected with a softened water pump in series, and a water outlet of the heated channel of the condenser is connected with a water inlet of the heat storage water tank through a first-stage hot water pipe. A high-temperature and high-pressure gaseous carbon dioxide inlet of the heat dissipation channel of the condenser is connected with a circulating medium outlet of the carbon dioxide compressor through a pipeline. According to the cascade energy storage and steam supply system of the fused salt energy storage coupled CO2 air source heat pump water heater, the electricity price advantage of electricity in the off-peak period is fully utilized, the operation cost of a steam supply system of an enterprise can be reduced, and finished steam with the lower cost is provided for the enterprise.

The present invention relates to the technical field of softening water treatment, specifically a softening water treatment device, including a filter box body, a raw water outlet pipe is arranged at the upper end of the filter box body, a water inlet is opened at the top of the filter box body, a filtering and cleaning mechanism is arranged on the surface of the water inlet, a valve device is rotatably connected inside the raw water outlet pipe, a support frame is fixedly connected to the surface of the filter box body, a driving mechanism is fixedly connected to the inside of the support frame, a synchronization mechanism is fixedly connected to the surface of the filter box body, a packing mechanism is arranged on the side of the synchronization mechanism, and an ion exchange resin filter is fixedly connected inside the filter box body. In the present invention, when the spring rod rotates, it will drive the sliding rod fixed on the notch to reciprocate inside the slide slot, and the sliding rod drives the scraper bar fixed on the other side to scrape back and forth on the surface of the filter screen, scraping off the debris on the surface of the filter screen, so as to facilitate the cleanliness of the filter screen when it is used next time.

The utility model discloses an energy storage type steam system based on a steam heat accumulator, which comprises a softened water supply unit, a gas steam supply unit, an electric steam boiler, the steam heat accumulator and a second thermal deaerator, the steam distribution cylinder is connected with the second thermal deaerator through a second steam pipeline, water supply of the first thermal deaerator is divided into two paths, the first path is connected with the gas steam boiler through a second water supply pipeline, and the second path is connected with the electric steam boiler through a third water supply pipeline. The electric steam boiler is used for supplying steam in an auxiliary mode, steam can be stored in the off-peak electricity period, the stored steam is used for supplying steam, the steam heat accumulator has the peak load shifting function, the proportion of absorbing green electricity is increased, gas consumption is reduced, energy is saved, emission is reduced, and the influence of steam load fluctuation on the gas steam boiler is eliminated. And the service life of the gas-steam boiler is prolonged.

The invention belongs to the field of wine brewing distillation, and provides a waste heat recovery type wine brewing distillation system and method. Comprising ground pot equipment, a wine retort, a precooler, a waste heat water pump, a heat accumulating type evaporator, a first refrigerant compressor, a first throttling valve, a steam generator, a middle tube plate, a condensation recovery device, a second throttling valve, a second refrigerant compressor, an evaporative condenser, a low-temperature fin type heat exchanger, a third throttling valve, a third refrigerant compressor, a softened water supply device and a first water supplementing valve. The system comprises a first water replenishing valve, a second water replenishing valve, a first steam supply valve, a second steam supply valve, a third steam supply valve, a wine receiver, a ground pot water valve and a grain moistening valve. Through the multiple waste heat recovery devices, full recovery and utilization of waste heat in the wine cooling process are achieved; steam is automatically generated through the steam generator, the wine retort and related devices, and input of external energy is reduced; the gradient cooling of the wine steam is realized through the precooler and the condensation recovery device, the wine cold output temperature is reduced, and the wine yield is improved.

The utility model belongs to the technical field of water treatment equipment, and relates to double-valve-body softened water treatment equipment which comprises a first valve body part and a second valve body part, and the first valve body part comprises a first valve body, a communicating pipe and a movable valve plate; a first valve outer cavity and a first valve inner cavity which are coaxial and separated from each other are formed in the first valve body. The first valve inner cavity comprises a drainage cavity which is coaxial and separated from each other, a first cavity, a second cavity, a third cavity and a fourth cavity, wherein the first cavity, the second cavity, the third cavity and the fourth cavity are evenly distributed around the circumference of the drainage cavity, and the corresponding central angles of the first cavity, the second cavity, the third cavity and the fourth cavity are 90 degrees. The movable valve plate is provided with a central drainage groove, a water inlet through hole, a first groove, a second groove and a third groove, a salt suction opening is formed in the communicating pipe, and a first channel, a second channel, a third channel and a fourth channel which are separated from one another are arranged in the communicating pipe. The device has the characteristics of simple structure, small size, excellent water passing performance and high water treatment efficiency.

The invention belongs to the technical field of heat pump units, and particularly relates to a high-efficiency middle-deep layer geothermal heat pump unit which comprises a unit body and a heat exchange pipe fixedly communicated to the unit body, and a water temperature sensor is further arranged at the position, corresponding to a water return opening, of the heat exchange pipe. The system further comprises a water softening mechanism, a bactericide supplementing mechanism, a water pressure real-time monitoring feedback mechanism, a water pressure descending speed monitoring feedback mechanism, an alarm grade dividing mechanism, an automatic water supplementing and pressure stabilizing mechanism and a working frequency self-regulating mechanism. Heat exchange water can be automatically softened, the content of ions such as calcium and magnesium is reduced, scaling is prevented, the heat exchange efficiency is maintained, the service life of equipment is prolonged, and cost is reduced; the regeneration frequency of the water softening mechanism and the bactericide adding frequency can be automatically regulated and controlled according to the water temperature, and the softening and sterilizing effects are guaranteed; and leakage of the heat exchange tube can be effectively monitored, graded warning is performed according to the size of leakage points, workers can respond and process in time conveniently, and the fault risk is reduced.

The invention discloses a hardness removal method and system for a sulfate-based mine water concentrated solution, and the method comprises the following steps: sequentially introducing the sulfate-based mine water concentrated solution into a coagulating basin and a flocculation basin for chemical treatment, and allowing the treated mine water concentrated solution to enter a sedimentation basin for standing to obtain softened effluent; wherein lime or sodium hydroxide and a coagulant are put into the coagulating basin, and the coagulating basin is used for carrying out coagulating treatment on the mine water concentrated solution; sodium carbonate, a coagulant aid and an inducer seed crystal are put into the flocculation basin and used for carrying out flocculation treatment and precipitation reaction on the mine water concentrated solution subjected to coagulation treatment, the standing time of the flocculation basin is 14-45 minutes, the precipitation reaction time is 6-30 minutes, and the excessive amount of sodium carbonate is 1.5-2.5 mmol / L. According to the invention, the hardness of calcium in softened water can be lower than 20mg / L.

A water treatment system is provided that includes an inlet in fluid communication with a source of untreated water, where the inlet is in fluid communication with a prefiltration unit. The prefiltration unit is adapted to remove one or more components from the untreated water. A membrane element is in fluid communication with the prefiltration unit and is adapted to remove the one or more components from the untreated water. A permeate stream and a retentate stream are generated by the membrane element. The water treatment system further includes a first treatment vessel that is positioned downstream of the inlet. The first treatment vessel is provided with a first treatment chemical, and the first treatment chemical is adapted to remove the one or more components from the untreated water.

The utility model relates to the technical field of medical waste treatment, and discloses a medical waste incineration treatment system which comprises an incineration treatment production line, and the incineration treatment production line is composed of a feeding mechanism, an incineration mechanism, a waste heat boiler, a composite deacidification tower, a bag type dust collector, a wet deacidification tower and a chimney which are sequentially connected. A dry type quench cooler is integrated on the bag type dust collector, and an air outlet of the dry type quench cooler forms an outlet of the bag type dust collector; the softened water supply system is used for providing cooling water for the incineration mechanism and providing a water source for the waste heat boiler and the composite deacidification tower; and the compressed air supply system is used for providing feeding blowing gas for the composite deacidification tower and providing low-temperature dry gas for the dry quench cooler. The medical waste incineration treatment system has the advantages of being convenient to cool and convenient to supply treatment auxiliary materials.

The embodiment of the invention provides a steam generation system based on solid heat storage and fused salt heating and a control method of the steam generation system, and belongs to the technical field of oil exploitation equipment. The system comprises a preheating device connected with the water supply device and used for preheating softened water; the steam generating device is connected to the outlet end of the preheating device and is used for performing multi-stage evaporation on the preheated softened water so as to obtain wet saturated steam for steam injection; wherein the steam generation device and the fused salt heat storage device are correspondingly arranged, and the steam generation device executes heat exchange with high-temperature fused salt in the fused salt heat storage device so as to obtain wet saturated steam used for steam injection; and the control device is used for generating a linkage control scheme of the water supply device, the preheating device and the steam generation device based on the real-time steam injection requirement. According to the scheme, the problems of slow starting response and poor linkage in the prior art are solved, and the operation efficiency and energy efficiency of the steam generation system are remarkably improved.

The boiler softened water tank comprises a softened water tank body and a support, the bottom of the softened water tank body is fixedly connected with the support, the left side of the softened water tank body is fixedly connected with a liquid level sight glass, the surface of an emptying pipe is fixedly connected with an emptying valve, the bottom of the right side of the softened water tank body is communicated with a boiler pipe, and the bottom of the boiler pipe is communicated with a vacuum suppressor. The utility model relates to the technical field of boiler softened water tanks, a small liquid level control tank is installed outside the tank, a vacuum suppressor is installed at the top of the liquid level control tank and used for exhausting air when water enters, a floating ball valve is installed in the tank and connected with the softened water tank through a U-shaped bend, and the soft water tank is connected with the vacuum suppressor. The normal temperature is kept, the service life of the sealing piece is prolonged, the sealing piece can be maintained in time without shutdown when damaged and is not influenced by use and hot water in the tank, and the problem that the sealing piece of the floating ball valve is used at high temperature for a long time and is easy to age to cause water leakage is solved.

The utility model relates to the technical field of waste heat recovery devices, and discloses a waste heat recovery device for black water flash steam. The black water flash steam waste heat recovery device comprises a tank body, an annular air pipe is arranged on the inner wall of the tank body, air blowing pipes are evenly arranged on the inner wall of the annular air pipe, a partition plate is arranged on the top wall of the annular air pipe, a heat exchange mechanism is arranged on the top wall of the partition plate, and a rotating rod is arranged on the bottom wall of the partition plate; according to the scheme, the annular air pipe, the partition plate, the fan blades and other devices are arranged to be matched, softened water can be conveniently stirred through the device, the softened water makes full contact with the heat exchange mechanism, heat can be conveniently and evenly conducted into the softened water, and the heat exchange efficiency of the device can be improved; through cooperation of the heat exchange pipe, the gas disc, the exhaust valve and other devices, the device can conveniently conduct heat in steam into water through the heat exchange pipe, the heat in flash steam is recycled, and energy waste is reduced.

Systems and methods are described, which relate to internet-of-things (IoT) feedback systems, in which data received from a given IoT device may be analyzed by a controller and used as a basis for controlling another IoT device and / or sending an alert to a user. The controller may activate a dehumidifier upon detecting activation of a sump pump. The controller may monitor water level data and alert a user and / or request maintenance of the sump pump upon detecting the water level exceeds a threshold. The controller may monitor dishwasher data to detect suboptimal performance of a dishwasher, in response to which the controller may instruct valves of a manifold and water heater to close to isolate the dishwasher, and instruct a water softener to elevate salt levels of softened water during a self-cleaning cycle of the dishwasher.

The invention discloses a paper mill high-salt reclaimed water reuse treatment device, and belongs to the technical field of paper mill high-salt reclaimed water reuse treatment, the paper mill high-salt reclaimed water reuse treatment device comprises a reclaimed water collection pool, a manganese sand filter, a clean water pool, a self-cleaning filter, a UF system and a UF water production pool which are sequentially connected through pipelines, and an outlet of the UF water production pool is connected with a primary concentration RO device through a pipeline; the second-stage concentration RO device comprises a second-stage RO concentration membrane and a second-stage RO concentrated water tank; the second-stage RO concentrated water tank is sequentially connected with a hardness removal reaction tank, a hardness removal coagulation tank, a hardness removal flocculation tank, a softening clarification tank, a tubular ultrafiltration membrane, a tubular ultrafiltration water producing tank, a softener, a softened water tank, a third-stage security filter, a third-stage concentration DTRO device, a concentrated brine collecting tank, an MVR evaporation device and a condensate water tank through pipelines. The system is used for recycling the high-salt reclaimed water of the paper mill, and has the advantages of low operation cost, good use effect, small occupied area, large water recycling amount, good water outlet effect and the like.

The invention provides a top gas treatment system and method and a blast furnace. The method comprises the steps that top gas is supplied to a cooling and purifying tower through a top gas supply pipeline, cooling water is supplied to the cooling and purifying tower through a cooling water supply pipeline, and the cooling water is in contact with the top gas to conduct heat exchange and cooling on the top gas; purified water is supplied to the cooling and purifying tower through a softened water supply pipeline, and the purified water is used for purifying the top gas subjected to heat exchange and cooling; and communicating a top gas outlet of the cooling purification tower with a purified top gas downstream conveying pipeline, and outputting the top gas subjected to heat exchange cooling and purification treatment to the outside. In the cooling purification tower, cooling water can be in direct contact with the top gas for heat exchange and cooling, and softened water can be in direct contact with the top gas subjected to heat exchange and cooling for washing and purification; therefore, two different top gas purification processes can be carried out in the cooling purification tower, which means that cooling and dust removal of the top gas can be simultaneously realized in the same set of device.

The invention relates to the technical field of household water purification, and provides a control method and device, softening water purification equipment, electronic equipment, a medium and a product, the softening water purification equipment comprises a capacitive deionization system, and the capacitive deionization system is used for removing ions and salt in water. The control method of the softening water purification equipment comprises the following steps: acquiring historical operation data, a current state and user preference data of the softening water purification equipment; inputting the historical operation data, the current state and the user preference data into a prediction model to obtain a prediction result output by the prediction model; the prediction result comprises water demand and water quality change; determining working parameters of the capacitive deionization system according to the water demand, the water quality change and the current state; and controlling the capacitive deionization system according to the working parameters so as to output purified water meeting the water demand. Through the mode, the intelligent self-adaptive control characteristic of the softening water purification equipment is enhanced, and accurate water quality control, predictive maintenance and efficient, energy-saving and personalized water quality treatment are realized.

A water system configured for installation in a vehicle comprises a pressure washer, a de-ionization system configured for de-ionizing water, and a water softener configured for softening water. The de-ionization system is in fluid communication with the pressure washer and configured to supply de-ionized water to the pressure washer. The water softener is in fluid communication with a water tank installed in the vehicle and configured to supply softened water to the water tank. A tee junction in fluid communication with the de-ionization system and the water softener routes an inlet feed of water to each of the de-ionization system and the water softener. The water system may include valves for selectively routing water, water filters for filtering water, and a waterproof tray configured to contain the components within a single compartment of the vehicle.

The invention belongs to the technical field of thermal power plant circulating water and sewage pretreatment, and relates to a circulating water lime softening system and method based on seed crystal circulation and intelligent control. Comprising a raw water tank, a lime softening tank, a flocculation reaction tank, a clarification tank and a softened water tank, through the synergistic effect of the seed crystal reflux circulation and the intelligent control technology, the softening efficiency is remarkably improved, the medicament consumption and the sludge output are reduced, and the resource utilization of the calcium carbonate byproduct is realized; according to the system, through organic connection of the raw water tank, the lime softening tank, the flocculation reaction tank, the clarification tank and the softening water tank, accurate adding of lime, sodium carbonate, seed crystal and a flocculating agent is combined, and whole-process water quality on-line monitoring and intelligent regulation and control are matched, so that efficient softening treatment of circulating water blow-down water is realized, stable and up-to-standard effluent quality is ensured, and the quality of discharged water is improved. Meanwhile, the operation cost and the treatment effect are optimized.

The utility model relates to a softened water preparation device, in particular to a softened water preparation device with high hardness removal rate. The utility model relates to a softened water preparation device with high hardness removal rate, which comprises a water inlet pipe, a reaction chamber I, a settling chamber I, a settling chamber II, a reaction chamber II, a settling chamber III, a settling chamber IV, an immersed UF reaction tank, an adjusting chamber, an ion exchange chamber and a water outlet pipe which are sequentially arranged, a sodium carbonate solution adding opening is formed between the settling chamber II and the reaction chamber II.

The invention relates to the technical field of autoclaved aerated concrete slabs, in particular to an autoclaved aerated concrete slab and a preparation method thereof, and the autoclaved aerated concrete slab comprises the following raw materials by mass: 110-120 parts of lime; 140 to 150 parts of cement; 50 to 55 parts of desulfurized gypsum; 9-11 parts of aluminum powder; 8-15 parts of functional particles; 0.15 to 0.25 part of a polycarboxylic acid type water reducing agent; 0.08 to 0.12 part of a citric acid retarder; 0.08 to 0.12 part of a rosin thermopolymer air entraining agent; the hardness of the softened water is lower than 50mg / L. Through innovative design of functional particles and regulation and control of a whole-flow process, collaborative improvement of light weight, high strength, excellent durability and process stability of the autoclaved aerated concrete plate is realized; the problems that strength and density of a traditional product are difficult to balance, durability is insufficient due to weak interface bonding, and process fluctuation is caused by mismatching of gas forming and condensation rhythms are solved.

The utility model relates to the technical field of softened water processing, and discloses a softened water processing and filtering device which comprises a lower shell, the cross section of the lower shell is in an L shape, a first connecting pipeline, a second connecting pipeline and a third connecting pipeline are fixedly connected to the lower shell, a blocking piece is installed in the lower shell and comprises a blocking plate, and the blocking plate is fixedly connected with the lower shell. A baffle is arranged in the lower shell, a fixing hook is fixedly connected to the upper portion of the baffle, a sealing gasket is fixedly connected to the lower portion of the baffle, an upper cover is detachably connected to the upper portion of the lower shell, a limiting block is arranged on the upper cover, a filter plate is arranged in the lower shell, and the filter plate is fixedly connected with the limiting block through a fastener. According to the utility model, through the arrangement of the lower shell, the barrier piece and the limiting block, another filter channel can be provided when the filter plate is replaced, so that the filter plate is always in a filtering state, the filtering efficiency is improved, and the use is very convenient.

The utility model relates to an energy-saving and environment-friendly screw type steam compressor testing device, which comprises an air suction filter, an exhaust separator, a heat recoverer, a lubricating oil tank, a softened water tank and a softened water treatment device, an air suction silencer and an air exhaust silencer are respectively arranged on the compressor air exhaust pipe and the compressor air inlet pipe; the compressor air inlet pipe is connected with the exhaust separator through a circulating water spraying pipeline; the heat recoverer is connected with the softened water tank through a condensate pipe and a balance pipe, the softened water treatment device is connected with the softened water tank, and the softened water tank supplements water to the screw type steam compressor to be tested through a softened water supplementing pipe. The steam generation speed of the air dynamic heat engine is increased through the circulating water spraying pipeline, the dynamic heat engine time is short, and meanwhile the power consumption of the driving motor is reduced; the noise reduction effect is good, the noise reduction cost is greatly reduced, and meanwhile, the field working environment of the test device is greatly improved; through the condensation phase change white smoke elimination technology of the heat recoverer, the heat in the steam can be completely recycled.

The utility model discloses a reverse osmosis ultrapure water purification device in the technical field of water treatment, which comprises a dosing device, one end of a second connecting pipe is fixedly connected with a quartz sand filtering tank, and the quartz sand filtering tank is connected with an activated carbon filtering tank through a water pipe. The activated carbon filtering tank is connected with the water softening equipment through a water pipe, and the water softening equipment is connected with the precision filter through a water pipe, so that water can be preliminarily filtered in advance, impurities, suspended solids, organic matters, chromaticity, peculiar smell and the like in the water are removed, and the surface of the medium is adsorbed, so that the purpose of purifying the water is achieved; the softening equipment can reduce the hardness of water in the tank, remove calcium and magnesium ions in the water and reduce the total salt content in the water, and sterilization and disinfection are performed again through the ozone sterilization equipment, so that the burden of reverse osmosis membrane filtration is reduced, and the quality of purified water is improved.

The water softening system comprises at least two water softening assemblies, any water softening assembly comprises a softening tank, a water inlet pipeline, water softening resin and a water outlet pipeline, the water inlet pipeline and the water outlet pipeline are both communicated with the softening tank, the water softening resin is arranged in the softening tank, and the water outlet pipeline is communicated with the softening tank; the to-be-softened water entering the softening tank flows to the input end of the water outlet pipeline after being adsorbed by the water softening resin; the resin regeneration assembly is used for generating a saturated salt solution, any softening tank is provided with a salt water pipeline for inputting the saturated salt solution, and the multiple salt water pipelines are connected with the resin regeneration assembly; and the control assembly is used for controlling the flowing of the solution between the water softening assembly and the resin regeneration assembly. The water softening system is simple in structure, high in intelligent degree and accurate in brine proportion control, and the flushing and dissolving capacity is remarkably improved.

Method for softening produced oilfield brine for enhanced oil recovery, the method including dissolving gaseous carbon dioxide and a base in a produced oilfield brine that includes divalent ions to yield solid carbonates, filtering the solid carbonates to yield a softened water, and injecting the softened water into a subterranean formation.