348 results about "Water softening" patented technology

The embodiment of the invention discloses a leachate concentrated water softening control method based on double closed-loop predictive control, and relates to the technical field of automatic control of environmental engineering. The method comprises the following steps: acquiring multi-dimensional data acquired in real time; a dynamic mass balance equation of a magnesium removal / calcium removal reaction is constructed, the dosage of NaOH / Na2CO3 is optimized in a rolling mode on the basis of a model prediction control algorithm, and accurate control over the pH value and the hardness removal rate is achieved; a membrane pollution state space equation is constructed, a membrane type switching and cleaning strategy is optimized in combination with a dynamic programming algorithm, and Pareto optimal control of flux maintenance and cost minimization is achieved. The industrial problems of low control precision, high operation cost and poor system robustness in high-hardness wastewater softening treatment are solved, and the method has remarkable technical advancement and engineering application value.

The present application relates to the technical field of water treatment devices, and provides a water softener. The water softener comprises a water softening valve, a connection assembly, a water path assembly, and resin tanks. The water softening valve comprises a valve body, a valve element assembly, a driving part, and a transmission mechanism. Both the valve element assembly and the driving part are disposed within the valve body, and the driving part is in transmission connection with the valve element via the transmission mechanism. The connection assembly is in communication with the water softening valve and is located at one side of the water softening valve. The connection assembly is provided with a drain passage. The driving part is configured to drive the transmission mechanism to act, so as to control opening of the drain passage. The water path assembly is in communication with the connection assembly, and is used to guide the flow of water. The resin tanks are used to soften water flowing therethrough. In the present application, a driving apparatus is employed to drive the transmission mechanism to act, so that the transmission mechanism can control the valve element to control water-path switching, and can control the opening of passages within the connection assembly, thereby enabling full control of the entire water path, simplifying control logic, improving control efficiency, reducing the number of control devices, and lowering the failure rate of the water path control assembly.

The utility model provides a purified water dispenser which comprises a water softening system, a water purifying system and a hot water system, the water purifying system comprises a filtering system, a soft water quality detection piece, a soft water temperature detection piece and a variable-frequency booster pump, and the soft water quality detection piece and the soft water temperature detection piece are both connected with the variable-frequency booster pump. The rotating speed of the variable-frequency booster pump is determined according to the total amount and temperature of dissolved solids in soft water measured by the soft water quality detection part and the soft water temperature detection part, and the stability of the water making flow speed of the purified water dispenser is guaranteed.

The embodiment of the utility model discloses a purified water dispenser which comprises a water softening system, a water purifying system and a controller, a water inlet of the water softening system is used for receiving raw water, and a water outlet of the water softening system can output soft water; a water inlet of the water purification system is communicated with a water outlet of the water softening system, a water outlet of the water purification system is used for outputting purified water, the water purification system comprises a filtering system and a wastewater drainage pipeline, a water inlet of the filtering system is communicated with the water inlet of the water purification system, and a water outlet of the filtering system is communicated with the water outlet of the water purification system; a wastewater port of the filtering system is communicated with a wastewater drainage pipeline; the controller is connected with the soft water system and is connected with the wastewater drainage pipeline; when the water outlet of the water softening system outputs hard water, the controller is used for controlling the wastewater drainage pipeline to increase the wastewater discharge capacity so as to protect the filtering system, and the filter element can have the normal service life.

The utility model discloses a soft water valve and waterway tandem type water softener which comprises a control valve, a waterway plate and a waterway plate joint which are connected in sequence, according to the water softening valve of the water softener, an existing water softening valve of the water softener is improved, the water softening valve does not need to be directly installed on the glass fiber reinforced plastic barrel, then the water softening valve is connected with the glass fiber reinforced plastic barrel in series through the water way plate connector and the water way plate, and therefore the water softening valve can be connected in series. Therefore, the soft water valve can be placed anywhere, the problem that the soft water valve must be installed on a glass fiber reinforced plastic barrel in the prior art is avoided, the soft water valve is more flexible, the size of the water softener is greatly reduced, and the functionality of the water softener is not affected.

The invention belongs to the technical field of direct drinking water processing, and particularly relates to a direct drinking water softening and sterilizing device which comprises a bottom plate, the two sides of the upper end face of the bottom plate are fixedly connected with a softening pool and a sterilizing pool respectively, one side of the bottom of the softening pool is communicated with the sterilizing pool through a connecting pipe, and a drainage pipe is arranged on one side of the sterilizing pool. An ultraviolet germicidal lamp is arranged at the top of an inner cavity of the sterilization tank, and a feeding auxiliary mechanism used for uniformly adding lime and soda into the softening tank is further arranged on the softening tank. By means of the feeding auxiliary mechanism, lime and soda discharged from the discharging port can make contact with leaves, the lime and the soda are scattered, the distribution area of the lime and the soda on the water surface is enlarged, meanwhile, the caked and coagulated lime and the soda can also be scattered, and therefore the lime and the soda can be evenly added into water, and the situation that the lime and the soda are not prone to falling off due to the fact that the water surface area is too large is avoided. And an operator is not easy to uniformly add lime and soda into water.

The present invention relates to the field of soft water, and provides a resin tank assembly and a soft water device, wherein the resin tank assembly includes a tank body, a waterway plate, a central tube and an adapter, wherein the tank body has a receiving cavity and a tank mouth communicating with the receiving cavity; the waterway plate is installed at one end of the tank body close to the tank mouth, and the waterway plate has a soft water channel to communicate with the soft water channel through an adapter seat; the central tube is arranged in the receiving cavity, and the first end of the central tube passes through the tank mouth; the adapter is connected between the first end of the central tube and the adapter seat, and a water guide chamber communicating with the soft water channel and the central tube is formed between the adapter and the adapter seat. The present application simplifies the connection between the waterway plate and the central tube, while reducing the flow change at the transition between the waterway plate and the central tube, thereby improving the soft water output efficiency of the soft water device.

The invention provides a mine water softening and dosing system and a control method, and belongs to the technical field of water treatment equipment, and the mine water softening and dosing system comprises water treatment equipment, a detection mechanism, an adjusting mechanism and a control unit. Through cooperation of the detection mechanism and the control unit, feed-forward detection and feed-back detection of softening treatment of mine water are achieved, and the control unit can achieve determination of the initial feeding amount of drugs and adjustment of subsequent feeding according to the feed-forward detection and the feed-back detection; the flow, alkalinity and pH value of inlet water and outlet water as well as the turbidity and alumen ustum image of the outlet water are detected at the same time, and the control system can comprehensively sense the water quality change and the treatment effect according to the detection result, so that the refined and automatic adjustment of the addition of various medicaments is realized, the dependence on human eye observation and manual test is reduced, and the operation is simple and convenient. The intelligent level and the operation efficiency of the whole water treatment process are improved.

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.

A system for softening high-salinity water via self-induced calcium bicarbonate crystallization in a fluidized bed, including a fluidized bed-based crystallization-softening reaction unit, a water feeding unit, a dosing unit and a regulation unit. The fluidized bed-based crystallization-softening reaction unit is configured to induce a crystallization reaction to soften high-salinity water. The water feeding unit is configured to supply high-salinity water to the fluidized bed-based crystallization-softening reaction unit. The dosing unit is configured to supply a pH regulating agent to the fluidized bed-based crystallization-softening reaction unit. The regulation unit is configured to perform reflux replenishment for the fluidized bed-based crystallization-softening reaction unit and recover escaping crystals. A high-salinity water softening method using such system is also provided.

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 purification water dispenser comprises a water softening system, a water purification system and a hot water system, the water softening system is communicated with a raw water inlet of the purification water dispenser, the water purification system comprises a reverse osmosis filter element and a booster pump, and a water inlet of the reverse osmosis filter element is communicated with a first soft water outlet channel of the water softening system; the booster pump is arranged between a first soft water outlet channel of the water softening system and a water inlet of the reverse osmosis filter element, a water inlet of the hot water system is communicated with a water outlet of the reverse osmosis filter element, and the hot water system is used for providing hot water softened by the water softening system and purified by the water purification system for a user. According to the technical scheme, raw water can be softened through the water softening system, and the concentration of calcium and magnesium ions in water entering the reverse osmosis filter element is reduced, so that the service life of the reverse osmosis filter element is prolonged.

The invention discloses a water softening valve and a water softener, and relates to the technical field of water treatment equipment.The water softening valve comprises a valve body and a driving mechanism; the valve body is provided with a piston and a valve cavity communicated with a plurality of channels, and the piston is arranged in the valve cavity in a sliding mode so as to switch the channels communicated with the valve cavity; the driving mechanism comprises a mounting seat, a transmission assembly and a driving part, the mounting seat is connected to the valve body, the transmission assembly is movably arranged on the mounting seat and is in transmission connection with the piston, a first mounting groove is concavely formed in the mounting seat from the side deviating from the valve body to the side connected with the valve body, and a second mounting groove is concavely formed in the mounting seat from the side deviating from the valve body to the side connected with the piston. The driving part is at least partially installed in the first installation groove, and the driving part is in driving connection with the transmission assembly. According to the technical scheme, the size of the soft water valve is reduced, and the installation convenience of the soft water valve is improved.

The present invention relates to the technical field of water purification. Disclosed is a water softening treatment apparatus for beer brewing. The water softening treatment apparatus comprises a control cabinet, a main frame, a driving pump, a driving electric motor, a plurality of filters, a pipe, a washing pump, a softening tank, a salt box and a water intake pipe, wherein the control cabinet is mounted at the top of the main frame; the driving pump and the washing pump are mounted on two sides of the control cabinet; the driving electric motor is mounted at the top of the driving pump; the plurality of filters are mounted on a rear side of the control cabinet; the pipe connects the driving pump to the plurality of filters, and the pipe connects the washing pump to the salt box; the softening tank is mounted on one side of the filters; the filters are in communication with the softening tank by means of the water intake pipe; the salt box is arranged on one side of the softening tank; and a rotatable regeneration device is mounted in the middle of the softening tank. The water softening treatment apparatus solves the problems such as the efficiency and quality of water softening being affected by insufficient resin regeneration caused by incomplete washing during the resin regeneration performed by an existing water softening apparatus.

The embodiment of the utility model discloses a purified water dispenser, a control method and a computer readable storage medium, the purified water dispenser comprises a water softening system, a water purifying system and a controller, a water inlet of the water softening system is used for connecting tap water, and a water outlet of the water softening system can output soft water; a water inlet of the water purification system is communicated with a water outlet of the water softening system, a water outlet of the water purification system is used for outputting purified water, the water purification system comprises a pressurizing pipeline and a filtering system, a water inlet of the pressurizing pipeline is communicated with the water inlet of the water purification system, and a water outlet of the pressurizing pipeline is communicated with a water inlet of the filtering system; a water outlet of the filtering system is communicated with a water outlet of the water purifying system; the controller is connected with the water softening system and is connected with the pressurizing pipeline; when the water outlet of the water softening system outputs hard water, the controller can control the water pressure in the pressurizing pipeline to be reduced, so that the reverse osmosis filter element can reach the normal service life.

The purification water dispenser comprises a water softening system and a water purification system, the water softening system is communicated with a raw water inlet of the purification water dispenser, the water purification system comprises a reverse osmosis filter element, a waste water backflow pipeline and a booster pump, and a water inlet of the reverse osmosis filter element is communicated with a water outlet of the water softening system. A water outlet of the reverse osmosis filter element is communicated with a pure water outlet of the purified water dispenser, a water inlet of the wastewater backflow pipeline is communicated with a wastewater opening of the reverse osmosis filter element, a water outlet of the wastewater backflow branch is communicated with a water inlet of the reverse osmosis filter element, and the booster pump is arranged between a water outlet of the water softening system and the water inlet of the reverse osmosis filter element. Through the arrangement, the water softening system firstly softens raw water to reduce the concentration of calcium and magnesium ions in water entering the reverse osmosis filter element, so that the calcium and magnesium ions are prevented from forming scale on the membrane surface of the reverse osmosis filter element, and the service life of the reverse osmosis filter element is further prolonged.

The present invention provides a composite nanofiltration membrane, its preparation method, and application. The composite nanofiltration membrane comprises a supporting base membrane and an active separation layer supported on the supporting base membrane; the active separation layer comprises an interfacial polymerization product of a polyamine and a polyacyl chloride that has undergone post-treatment modification; the post-treatment modification comprises post-treatment with a mixed solution of an amine-containing solute and a swelling solvent. The composite nanofiltration membrane has a narrow pore size distribution, high hydrophilicity, and a smooth surface with a near-neutral charge. While significantly improving pure water permeation flux, it achieves high separation selectivity for small-molecule organic compounds and exhibits excellent anti-fouling properties and long-term operational stability. The composite nanofiltration membrane can be used for wastewater decolorization, wastewater desalination, resource recovery, or water softening.

The present application relates to soft water technical field, provide a kind of resin tank assembly and soft water device, wherein, resin tank assembly includes resin tank body and waterway component, resin tank body has the accommodating cavity of accommodating resin and the necking, necking is located at the end of one end of resin tank body, the end of resin tank body is equipped with tapering portion, tapering portion is tapered towards necking direction setting, tapering portion is equipped with first clamping portion along the circumference of necking;Waterway is constructed in waterway component, and the communicating port is equipped on waterway component, waterway is communicated with necking by communicating port, and the second clamping portion corresponding to first clamping portion is equipped on the circumferential side of communicating port, and second clamping portion is connected by with first clamping portion spin card.This application has reduced the contact area between resin tank body and waterway component, thereby reducing the opening force between resin tank body and waterway component, and the connecting strength between resin tank body and waterway component is improved.

The invention discloses a gas field wastewater treatment process, belongs to the technical field of wastewater treatment, and solves the technical problems of poor treatment effect and high cost of fracturing flowback fluid in the prior art. The treatment process comprises regulating homogenization, flotation reaction, advanced oxidation, biochemical treatment, boron removal treatment and membrane treatment. The flotation reaction comprises adding 10-300 ppm of an organic breaker, 50-1100 ppm of a hard water softener, 1-200 ppm of a heavy metal scavenger, 1‰-2‰ of a flocculant, and 10-100 ppm of a coagulant aid to the wastewater, and pneumatically stirring the wastewater to obtain a supernatant. The advanced oxidation comprises performing ozone oxidation, iron-carbon micro-electrolysis and electrocatalytic oxidation on the supernatant obtained by the flotation reaction. The biochemical treatment comprises performing anaerobic denitrification and aerobic treatment on the wastewater after the advanced oxidation. The invention has the advantages of low dosage of reagents, simple and stable process, high treatment efficiency and no secondary pollution.

The invention discloses a water softening valve and a water softening machine, and relates to the technical field of water softening machines, a valve body of the water softening valve is provided with a valve cavity, a grating assembly comprises a plurality of supporting baffle rings arranged at intervals, the outer peripheries of the multiple supporting baffle rings abut against the inner circumferential face of the valve cavity, and a water passing cavity is formed between every two adjacent supporting baffle rings; the piston is connected to the inner peripheries of the supporting baffle rings in an inserted mode and comprises a first piston body and a second piston body which are connected, the diameter of the first piston body is larger than that of the second piston body, the first piston body is provided with a water passing channel with the two ends communicated, and a first water passing ring groove is formed in the periphery of the first piston body. A second water passing ring groove is formed in the periphery of the second piston body, and the supporting baffle ring abuts against the piston to block communication between the corresponding water passing cavities. In the process that the piston moves in the axial direction of the valve cavity, the first piston body is at least connected with the inner peripheries of the two supporting baffle rings in an abutting mode. According to the technical scheme, the sealing performance of the soft water valve can be improved.

The present invention provides a plant indigo exhaust dyeing process for garments and the resulting indigo-dyed garments. The process comprises placing garments to be dyed in a non-air-insulated dyeing machine and adding water for infiltration; pumping a mixed solution of liquid caustic soda and sodium sulfate into the dyeing machine and operating the dyeing machine; mixing a plant indigo dye solution and a sodium sulfate solution and adding the mixture into the dyeing machine to dye the garments; pumping the mixed solution of liquid caustic soda and sodium sulfate into the dyeing machine and continuing to dye the garments; subjecting the dyed garments to oxidative water washing, dehydration, drying, ozone treatment, and water softening treatment to obtain indigo-dyed garments. The process provided by the present invention has the advantages of simple process, short dyeing time, convenient operation, re-dyeing and reworkability, and good stability. The indigo-dyed garments obtained by the process have unique style, uniform color, bright color, fresh and natural style, high color fastness, and meet the first-class plant dye standard, meeting subsequent wearing requirements.

The present application relates to the technical field of water treatment, and provides a soft water valve and a soft water machine. The soft water valve comprises a valve shell, a raw water inlet, a soft water outlet, a main cavity, a secondary cavity, a raw water outlet and a soft water inlet; the raw water outlet and the soft water inlet are communicated through a softening device; the secondary cavity is communicated with the soft water outlet; the main cavity is communicated with the raw water outlet; a main valve assembly comprises a main valve core and a main driving part; the main valve core is located in the main cavity; the main cavity and the raw water inlet are adjusted by the main valve core; a secondary valve assembly comprises a secondary valve core and a secondary driving part; the secondary valve core is located in the secondary cavity; the soft water inlet and the secondary cavity are adjusted by the secondary valve core; the soft water valve is switched between a first water taking state and a second water taking state; in the first water taking state, the main cavity is communicated with the raw water inlet through the main valve core; the secondary cavity is communicated with the soft water inlet through the secondary valve core; in the second water taking state, the secondary cavity is communicated with the raw water inlet. The soft water valve provided by the present application can realize the switching of multiple functions and simplify the structure of the soft water valve.

The utility model discloses a water softening device for a boiler, which relates to the field of water treatment equipment and comprises a box body, a partition plate is arranged in the box body to form a first chamber positioned above the partition plate and a second chamber positioned below the partition plate, and the first chamber is communicated with the second chamber through a chamber connecting pipe; the softening assembly comprises sliding grooves formed in the inner walls of the two sides of the first cavity and filtering boxes installed in the sliding grooves in a sliding mode; one end of the water distribution pipe is externally connected with boiler water, the other end of the water distribution pipe penetrates into the first cavity and is connected with a water distributor arranged above the filter box, and a plurality of water distribution holes are formed in the water distributor and used for uniformly distributing water to the filter box; one end of the second chamber water outlet pipe is communicated with the second chamber, the other end of the second chamber water outlet pipe is connected with the boiler, and water in the second chamber is discharged into the boiler. According to the utility model, a split type structure is adopted, and the softening assembly is of a detachable structure, so that ion exchange resin which is lost after long-term use is convenient to replace.

The utility model discloses a water distributor assembly, a resin tank, a water softening system and a purified water dispenser, and relates to the technical field of water softening and purifying equipment.The water distributor assembly comprises an inner ring body, an outer ring body, a plurality of annular ribs and a plurality of connecting ribs, and the annular ribs and the connecting ribs are arranged between the inner ring body and the outer ring body; the two ends of the connecting ribs are connected with the inner ring body and the outer ring body respectively, the multiple connecting ribs are arranged at intervals along the circumferential side of the inner ring body, the connecting ribs and the annular ribs are arranged in a crossed mode and connected, so that the inner ring body and the outer ring body are connected together, and the multiple annular ribs can be sequentially distributed at intervals in the radial direction of the outer ring body. The annular ribs comprise the first ribs and the second ribs, and the width of the first ribs in the radial direction of the outer ring body is larger than that of the second ribs in the radial direction of the outer ring body, so that the first ribs can further improve the structural strength of the disc body, and the rigidity of the water distributor assembly can be improved; and the water distributor assembly is not easy to deform under the impact of water flow.

The utility model relates to the technical field of water treatment devices, and discloses a water distributor assembly and water softening equipment. The water distributor assembly comprises a central pipe, an upper water distributor and a lower water distributor, wherein the upper water distributor is connected to the top of the central pipe; the lower water distributor comprises a lower water distributor body and an inserting protrusion arranged on the lower water distributor body in a protruding mode, and the inserting protrusion is inserted into the central pipe from the bottom of the central pipe. The lower water distributor body is provided with the insertion bulge, so that when the water softening equipment is assembled, after the tank body is filled with resin, the insertion bulge of the lower water distributor can be aligned with the bottom of the central pipe to be inserted into the central pipe, and the condition that the resin is extruded when the lower water distributor and the central pipe are assembled is avoided; therefore, the use performance of the resin and the softening effect of the water softening equipment are ensured, and the user experience is improved.

The invention discloses a control valve, a water softener and a control method of the water softener, and belongs to the technical field of water softening treatment.The control valve is provided with a first valve cavity and a second valve cavity, and control assemblies composed of grids and pistons are arranged in the two valve cavities correspondingly; the independent axial movement of the two pistons is utilized to flexibly combine and form different waterway connection states, so that the single valve body structure can realize three water supply modes of series connection, parallel connection and one-use and one-standby. According to the scheme, one control valve can switch working modes in a self-adaptive mode according to different water hardness and water flow requirements, the water outlet quality can be guaranteed through a series connection mode under high-hardness water quality, the water supply requirement can be met through a parallel connection mode when large flow is needed, and the water supply efficiency is improved. And meanwhile, alternate working and regeneration of the resin tanks can be realized in a one-use and one-standby mode.

The utility model relates to the technical field of softened water treatment, disclose a kind of softened water treatment device for induced crystallization granulation, the side end of water inlet pipe is fixedly connected with filter box, the bottom of filter box is fixedly connected with extension box, the inside of filter box is equipped with the filter assembly for filtering hard water impurities, the inside between the inside of filter box to extension box is equipped with water retaining component, the outside top of filter box is equipped with two groups of limiting component for limiting filter assembly and water retaining component, the utility model is provided with limiting component, filter assembly and water retaining component, hard water first after flowing to filter screen after passing through pass, to realize the filtration of impurities in hard water, it is convenient to filter and treat hard water, avoid the situation that the accumulation and deposition of impurities in water appear in the softened water operation, avoid the situation that impurities block pipeline appear in the conveying process of water flow, to avoid the normal progress of hard water softening operation.

The invention relates to the technical field of water treatment, and particularly discloses a water softening treatment device which comprises a tank body, the tank body is filled with resin particles, a central pipe is arranged at the axis in the tank body, a water outlet pipe and a water inlet pipe communicated with the central pipe are mounted at the top of the tank body, a blow-down valve is mounted at the bottom of the tank body, and a plurality of partition plate groups are arranged in the tank body in the vertical direction. Every two adjacent partition plate sets are rotationally staggered by 180 degrees relative to the axis of the tank body, each partition plate set comprises an upper partition plate and a lower partition plate, a filler cavity is formed between the upper partition plate and the lower partition plate, and the upper partition plate and the lower partition plate are the same in structure and rotationally staggered by 180 degrees relative to the axis of the tank body. Resin particles are forced to deform through mechanical pressure under the reciprocating extrusion action of the upper partition plate, so that residual pollutants in the resin particles are extruded out, and the reciprocating extrusion mode not only improves the regeneration effect, but also remarkably reduces the time required by regeneration.

The application discloses a storage-stable methylglycine-N,N-diacetic acid trialkali salt composition and a preparation method and application thereof, which comprises methylglycine-N,N-diacetic acid trialkali salt, N,N-dimethylglycine metal salt, sulfite and water. The composition can be used for storing and / or stabilizing transportation of methylglycine-N,N-diacetic acid trialkali salt, improving the stability of the metal ion chelating ability of the composition product, especially the stability of the chelating ability of calcium ions and magnesium ions, and the composition product can be stably applied to the fields of daily washing, water softening and sewage treatment.

The present application relates to the technical field of water treatment, and provides a soft water valve and a soft water machine. The soft water valve comprises a valve shell, a main valve assembly and a secondary valve assembly. The valve shell comprises a raw water channel, a soft water channel, a main cavity, a secondary cavity, a raw water outlet and a soft water inlet. The raw water outlet and the soft water inlet are connected through a softening device. One end of the raw water channel forms a raw water inlet, and the other end of the raw water channel is connected with the main cavity. One end of the soft water channel forms a soft water outlet, and the other end of the soft water channel is connected with the soft water inlet. The main valve assembly comprises a main valve core. The secondary valve assembly comprises a secondary valve core. A bypass valve is connected to the valve shell and is used for controlling the on-off of the raw water channel and the soft water channel. In the water production mode, the main cavity and the raw water outlet are connected through the main valve core, the soft water inlet is connected with the soft water channel, and the bypass valve connects or disconnects the raw water channel and the soft water channel. The soft water valve provided by the present application can realize the flow direction adjustment of raw water and raw water through the cooperation of the double cavities and the double valves, and can also adjust the water hardness.