9661results about "Filtration separation" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

The invention discloses a pressure regulating solenoid valve, which relates to the technical field of solenoid valves, and comprises a valve body, the top of the valve body is provided with a valve seat, the valve seat is internally provided with a cavity, and through the arrangement of a first pressurizing hole, a second pressurizing hole, a flow dividing hole, a first flow dividing pipeline, a second flow dividing pipeline, a first pressurizing cavity and a second pressurizing cavity, the pressure regulating solenoid valve is formed. During use, when unstable high water pressure flows into the valve body, the high water pressure pushes the inner barrel upwards, then the inner barrel moves upwards to drive the flow dividing holes to move upwards, the flow dividing holes are driven to be sequentially in butt joint with the first pressurizing hole and the second pressurizing hole respectively, and then water is divided into the first flow dividing pipeline and the second flow dividing pipeline; then water flows into the first pressurizing cavity or the second pressurizing cavity, then water pressure is dispersed, then the water flowing into the first pressurizing cavity or the second pressurizing cavity downwards compresses the first spring to cause deformation shortening, and meanwhile, a stretched second spring is matched, so that when the water pressure upwards jacks the sleeve and the inner cylinder, buffering protection on the sleeve and the inner cylinder is enhanced.

Embodiments described herein provide a self-contained, above-the-counter beverage dispenser that allows for personalization of flavor intensity, temperature, and carbonation levels. The system can have a small form factor that allows it to sit on a countertop and below upper cabinetry. The dispenser can dispense carbonated beverages, still beverages, flavored beverages, hot beverages, cold beverages, and combinations thereof. Moreover, unlike existing systems, embodiments described herein may maintained by a user without special training, tools, or technical expertise. The dispenser can include consumable components, such as ingredient cartridges, a gas cylinder, and a filter. Each of these consumable components can be replaced easily without any tools or special training or expertise. Additionally, all consumables can be accessible behind a door on the front of the machine, making them readily accessible by only opening the front door.

A filter press includes a fabric stacking device, a filter press frame assembly, and a filter press device. The filter press frame assembly includes a filter press frame and a base plate. The filter press device includes a base, a main hydraulic cylinder, and a pressure plate. The fabric stacking mechanism includes a frame, a filter cloth operating assembly, a sludge discharge mechanism, a sludge separating and pressing mechanism, a pressing roller, and a fabric stacking and feeding mechanism. The filter cloth operating assembly includes a cloth winding mechanism, a winding and measuring mechanism, and a filter cloth correction mechanism. The cloth winding mechanism includes a cloth winding roller that can move along its own axial direction and rotate around its own axis. The cloth winding roller adjusts its position by moving along its own axial direction according to the detection result of the winding and measuring mechanism. The sludge separating and pressing mechanism includes a pressing plate with a horizontally arranged pressing part. The setting height of the pressing roller is adjustable, and the axis of the pressing roller is perpendicular to the moving direction of the lower filter cloth. The fabric stacking and feeding mechanism is located at one end of the frame and is used to transport sludge bags formed by the upper and lower filter cloths wrapping sludge. This invention can automatically correct the filter cloth deviation, keep the filter cloth flat, and prevent sludge leakage.

A disk-pack turbine for use, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid through a vortex chamber into an expansion chamber and then through at least a portion of a waveform pattern present between at least two rotors and / or disks. The rotors and / or disks having waveform patterns on at least one side. In at least one embodiment, the waveform patterns include a plurality of hyperbolic waveforms travelling around an axial center of the disk with each hyperbolic waveform having a varying diameter along the waveform.

A clothes dryer using an LED light source is proposed. Instead of using a heater, a blowing fan, and a heat exchanger, the clothes dryer employs a plurality of LED light source modules provided in a body and efficiently arranged therein and an air circulation structure of an air circulation part having a blowing fan arranged in the inner rear side thereof, and is configured to sterilize air through an air sterilization part, absorb and dry moisture by a ceramic filter, and then finally discharge the air to the outside through an exhaust fan. Therefore, without requiring a separate water discharge treatment process in an existing method, the clothes dryer can achieve efficient drying of clothes and drying of clothes without damage.

The invention discloses a method for realizing multi-stage solid-liquid separation by using graded filter pipes, which relates to the technical field of solid-liquid separation, and comprises the following steps: under the condition that the particle size between adjacent filter pipes is at a critical boundary, collecting a continuous motion track of particles in a particle size interval in a filter transition area, extracting a direction vector change sequence and a flow velocity disturbance amplitude, and judging whether particles of which the direction reversal frequency exceeds a preset threshold and the flow velocity disturbance amplitude is lower than a stable fluctuation limit exist or not so as to determine whether a particle repeated movement state occurs or not; a drift factor and a disturbance sensitivity factor are constructed according to a particle repeated movement state and are introduced into an affiliation path identification model as input variables, and affiliation judgment operation is executed through an affiliation probability calculation network. According to the invention, the problem that the path attribution of particles with critical particle sizes in the filtering transition area is unknown is solved, and the dynamic identification and accurate guide control of the particle attribution path are realized.

The utility model provides a cloth pressing assembly and water-containing material dewatering equipment, the cloth pressing assembly comprises a pressing rod which is used for pressing filter cloth and extends along the horizontal direction, and an angle is formed between the length direction of the pressing rod and the laying direction of the filter cloth; the limiting component is at least arranged on the side, facing the laying direction of the filter cloth, of the pressing rod, and the limiting component is attached to the pressing rod. According to the utility model, through the arrangement of the limiting component, when the pressing rod is subjected to the horizontal acting force of the filter cloth, the pressing rod can be propped through the limiting component, particularly, one side, facing the laying direction of the filter cloth, of the pressing rod is propped, so that the pressing rod is prevented from displacing along the horizontal direction, and the pressing effect of the pressing rod on the filter cloth is ensured.

The invention particularly relates to a double-sealing special-shaped ball valve which comprises a valve body, a valve rod rotating and lifting operation mechanism movably installed at the top of the valve body and a connector arranged at the bottom end of the valve rod rotating and lifting operation mechanism. A notch is formed in the top of the special-shaped ball valve clack movably installed in the valve body and can be tensioned, a thin-layer slotting plate part is arranged at the bottom of the special-shaped ball valve clack, deformation is easier, a side through opening is formed in the middle of the special-shaped ball valve clack and used for switching rapid water passing, and therefore the whole structure is an inverted-C-shaped special-shaped ball, and the special-shaped ball valve has the high opening and contracting functions. The left side and the right side of the special-shaped ball valve clack shrink and deform towards the middle portion, the two inclined holes close the notch in the top of the special-shaped ball valve clack, so that the second sealing gasket is separated from the first sealing gasket, and at the moment, in the whole rotating opening and closing process of the valve, the second sealing gasket of the special-shaped ball valve clack and the first sealing gasket of the connecting pipe do not rub; the service life is long.

The invention discloses a filter intelligent backwashing control system based on a pressure sensor, and relates to the technical field of intelligent equipment, and the filter intelligent backwashing control system comprises the following steps: S1, the system firstly executes pressure difference reference initialization, and determines a pressure difference reference value; s2, constructing a corrected differential pressure offset model, and determining the current differential pressure offset of the system; s3, constructing a blockage risk assessment model, and pre-judging whether the system needs to start backwashing or not; s4, carrying out segmented pulse backwashing control; and S5, constructing a closed-loop judgment model, and evaluating the actual backwashing effect of each stage. According to the method, a high-credibility differential pressure reference is obtained through a reference calculation model; the blocking trend is tracked in real time through the moving average pressure difference offset; constructing a blockage risk coefficient fusing the offset, the offset rate and the duration, and judging the flushing opportunity in multiple dimensions; a three-section flow is adopted to distribute flushing strength and duration according to needs; and after each section of pulse is finished, the backwashing effect is evaluated in a closed-loop manner through the closed-loop judgment model.

The invention belongs to the technical field of micro-nano processing, and particularly relates to a preparation method and application of a metal micro-nano tube array. Comprising the following steps: preparing a metal layer on the surface of a substrate; coining glue is sprayed on the surface of the metal layer, then coining is conducted through a template, and a micro glue column array is formed after curing; a plasma etching process is adopted, the micro glue column array is used as a mask, the metal layer exposed out of the gaps in the bottom of the micro glue column array is etched, and a structure with the micro glue columns wrapped by metal is formed; and removing the rubber columns in the structure of the metal-coated micro rubber columns to obtain the metal micro-nano tube array. According to the invention, a residual-layer-free imprinting technology is adopted, the problem of glue layer residue in traditional imprinting is avoided, and the etching uniformity is improved. A plasma dynamic balance process is adopted, the side wall redeposition effect of etching by-products is utilized, and the metal micro-nano tubes are formed in a self-assembly mode. The prepared metal micro-nano tube array has high aspect ratio compatibility, and the nano tube array with the aspect ratio as high as 10: 1 can be realized.

The invention belongs to the technical field of energy storage cooling, and particularly relates to a cooling circulation system and an equipment cooling method, and the cooling circulation system comprises a liquid inlet system, a heat exchange system and a liquid outlet system. The heat exchange system comprises a plurality of heat exchange units which are connected in parallel; the liquid inlet system is connected with the input end of the heat exchange system, and a pressure detection device, a liquid temperature measurement device I, a pollution discharge degassing tank and a liquid circulation driving unit are connected into the liquid inlet system; the liquid outlet system is connected with the output end of the heat exchange system, and a conductivity detection device, an outlet pressure detection device and a liquid temperature measurement device II are connected into the liquid outlet system. Through dynamic modular adjustment, multi-parameter intelligent control, energy-saving composite heat dissipation and high-reliability design, the problems of low heat dissipation efficiency, high energy consumption, high maintenance cost, poor adaptability and the like in the prior art are effectively solved; and particularly, the method has remarkable advantages in the aspects of precise heat dissipation of high-power-density equipment, stable operation under complex working conditions and full-life-cycle cost control.

The invention discloses self-adhesion-crosslinking double modified bamboo powder, a preparation method and application, and relates to the technical field of composites.The preparation method of the modified bamboo powder comprises the following steps that S1, bamboo powder, 2, 5-dihydroxyterephthalic acid, 4-aminobenzoyl hydrazine, N, N '-diisopropylcarbodiimide and tris (hydroxymethyl) aminomethane are mixed for a reaction; and S2, trimesic acid is added into the solution obtained after the reaction in the S1 for a reaction, filtering, washing and drying are conducted, and the self-adhesion-crosslinking double modified bamboo powder is obtained. The prepared modified bamboo powder is green and environmentally friendly, through a self-adhesion mechanism, a cross-linking mechanism, a branched-chain phenyl heterogeneous nucleation mechanism and the like, the interfacial compatibility of PBAT and the bamboo powder and the crystallinity of PBAT are improved, and therefore the mechanical property of PBAT / bamboo powder is enhanced.

The invention discloses a porous ceramic filter for liquid magnesium alloy purification and a preparation method thereof, and the porous ceramic filter comprises the following raw materials in percentage by mass: 70-85wt% of ceramic particles, 8-15wt% of multi-element oxide system microcrystalline glass brazing filler metal and the balance of a binder, al2O3-B2O3-SiO2-MgO-CaO multi-element oxide system microcrystalline glass brazing filler metal is adopted, under the condition of air atmosphere high-temperature calcination, a compact reaction layer containing a low-melting-point glass phase, an aluminum oxide phase, a magnesium aluminate spinel phase, a calcium aluminosilicate phase, a borate phase and a silicate phase is generated on the surfaces of ceramic particles of a porous ceramic filter through a chemical reaction; the magnesium alloy filter has high strength and good high-temperature stability, and the problems that the filter loses efficacy and magnesium alloy melt is polluted due to the fact that the filter is eroded by magnesium alloy liquid are effectively solved.

The invention relates to the technical field of filter press cleaning and discloses a plate-and-frame filter press cleaning system.The plate-and-frame filter press cleaning system comprises a spraying device, a sensor assembly, a control system and a sewage collecting tank, dirt and filtering resistance on the surface of filter cloth are detected through the sensor assembly, and the control system adjusts the working state of the spraying device according to sensor signals; according to the plate-and-frame filter press, the filter cloth of the plate-and-frame filter press is washed by the spraying device, and sewage generated by washing enters the sewage collecting tank for treatment, so that the working efficiency of the plate-and-frame filter press is improved, the efficiency reduction and manual cleaning requirements caused by blockage of the filter cloth are reduced, and the labor cost is reduced; the invention further provides a plate-and-frame filter press cleaning method, infrared thickness detection and pressure change rate two parameters are fused, the defect of a single sensor is avoided, the anti-interference capacity of the system is remarkably improved, cleaning is triggered based on the dirt index threshold value, cleaning is more timely and effective, and the service life of filter cloth and the service life of whole equipment are prolonged.

The invention relates to the technical field of pressure release valves, in particular to a fire-fighting pipeline linear adjusting pressure release valve and a method, the fire-fighting pipeline linear adjusting pressure release valve comprises a first valve body, and further comprises a third valve body, a second valve body, a third valve core assembly, a second valve core assembly and a third valve core assembly, the second valve body is fixedly connected to the top of the third valve body, and a second valve element assembly is connected to the interior of the second valve body; and the pressure regulating mechanism comprises a pressure assembly communicating with the water outlet end of the first valve body, and the top of the second valve body is connected with an elastic assembly. By arranging the pressure adjusting mechanism, a traditional single spring adjusting mode is broken through, the water pressure in the sealing cover and the mechanical pressure of the adjusting screw rod and the first spring are superposed to form a composite pressure relief threshold value, and a method for linearly and finely adjusting the pressure relief threshold value is added; incompressibility of a water medium is utilized, instantaneous pressure fluctuation is absorbed, fatigue failure of the spring under high-frequency impact is effectively avoided, and the device is suitable for starting and stopping of a fire pump or scenes where water hammers frequently occur.

The invention relates to the technical field of high-temperature gas filtration, and particularly discloses a preparation method of a high-temperature-resistant and corrosion-resistant composite spunlace filter material. The preparation method of the filter material comprises the following steps: pretreating the PTFE short fibers, the glass fibers and the high-temperature-resistant glass fiber woven base cloth; mixing the pretreated glass fibers with PI fibers to obtain mixed fibers; the pretreated PTFE fibers and the mixed fibers are respectively subjected to carding, net forming and net laying, the pretreated PTFE fibers form a surface layer, the mixed fibers form a bottom layer, pretreated high-temperature-resistant glass fiber woven base cloth is used as middle base cloth, pre-needled reinforcement and winding are performed to obtain a pre-needled felt, and the pre-needled felt is subjected to spunlace reinforcement, drying and winding to obtain a filter material plain felt; dipping, shaping and laminating the filter material to obtain the high-temperature-resistant and corrosion-resistant composite spunlace filter material. According to the method, a high-temperature-resistant system for increasing the temperature-resistant threshold value layer by layer is formed, the corrosion resistance is enhanced, and synergistic improvement of high temperature resistance and strong corrosion resistance is achieved.

A valve for quantitative discharge and a discharge method thereof are disclosed.The valve for quantitative discharge includes: a device case(5) having a valve body(51) inside of the device case(5)；the valve body(51) includes a plurality of adjustment units, a first flow channel(53) and a second flow channel(54) inside the valve body(51)；a solenoid valve(52) is installed on the valve body(51)；the adjustment unit(6) includes a piston cavity inside of the adjustment unit(6), and a piston component(64) is arranged in the piston cavity and divides the piston cavity into a liquid storage cavity(61) and a liquid discharge cavity(62)；the adjustment unit(6) also includes a flow guide component(63); when the solenoid valve(52) communicates with the first flow channel(53), the flow guide component(63) communicates with the liquid storage cavity(61), the first flow channel(53) feeds liquid into the liquid storage cavity(61), thereafter, pushing the piston component(64) to slide toward the liquid discharge cavity(62); when the solenoid valve(52) communicates with the second flow channel(54), the flow guide component(63) rises to communicate the liquid storage cavity(61) with the liquid discharge cavity(62); when the solenoid valve(52) recommunicates with the first flow channel(53), the first flow channel(53) introduces liquid into the liquid storage cavity(61) and pushes the piston component(64), causing the liquid in the liquid discharge cavity(62) to be discharged through the liquid outlet.The valve for quantitative discharge can realize the quantitative liquid discharge of a plurality of liquid discharge cavities.

A carbon dioxide capture module according to one or more embodiments may include: an absorber containing an amine-based absorbent capable of absorbing carbon dioxide; and a filter allowing air to pass through and preventing permeation of the amine-based absorbent. The filter is located between the amine-based absorbent and ambient air of the carbon dioxide capture module.

The invention relates to the technical field of micro-nano motors, in particular to a preparation method and application of a micro-nano motor for improving oil reservoir exploitation. Due to the wheel shape of the micro-nano motor and the hydrophobic modification effect, the micro-nano motor can move in a high-viscosity oil reservoir environment in oil reservoir exploitation. Under the action of a magnetic field, the micro-nano motor can controllably move in a complex three-dimensional core environment, and the size of the micro-nano motor can be reduced when the micro-nano motor encounters a narrower pore throat, so that the micro-nano motor can smoothly pass through the pore throat. When the micro-nano motor makes contact with crude oil drops, the micro-nano motor can carry the oil drops to move and carry the oil drops to a high-permeability area of the oil reservoir, and the motor carrying the oil drops is extracted to the ground along with displacement fluid, so that the recovery rate of the oil reservoir is increased. Meanwhile, the micro-nano motor can be recycled for multiple times.

The invention relates to a method (100) for manufacturing a photocatalytic multi-component fiber including the following steps:Supplying a support mixture (110), including at least one thermoplastic polymer;Supplying an active mixture (120), including:at least one organic polymer,at least one photocatalyst at a concentration of at least 10% by weight relative to the weight of active mixture,at least one coupling agent resistant to oxidation,Spinning (130) a multi-component fiber from support and active mixtures;Eliminating (160) the at least one organic polymer on the surface of the multi-component fiber so as to generate a photocatalytic multi-component fiber.The invention also relates to a multi-component fiber, a textile and a filter.

The embodiment of the utility model provides a filter plate of a plate-and-frame filter press and the plate-and-frame filter press, and relates to the technical field of filter presses. The filter plate of the plate-and-frame filter press comprises a filter plate main body, a plate frame body and a filter disc plate, and connecting grooves are formed in the front side and the rear side of the tops of the two sides of the filter plate main body. A pressing plate is pressed to drive a pull rod to move downwards, a second clamping plate is driven to move when the pull rod moves, the second clamping plate extrudes and retracts a spring set, at the moment, the second clamping plate is separated from the surface of a first clamping plate, and then a plate frame body and a filter disc plate can be detached for maintenance or replacement; meanwhile, when filtering work is completed and a hydraulic cylinder drives a movable end to be separated from a filter plate main body, a second spring is reset to drive a sliding ring to move on the surface of a positioning rod, so that a supporting plate drives a propping plate to move, and the propping plate drives a guide wheel and the spaced filter plate main body to assist in bouncing off, so that filtered materials are conveniently discharged, the pressure of a shifting device is reduced, and the filtering efficiency is improved. And the discharging efficiency is improved.

The invention discloses a filter cloth on-line automatic cleaning control method and system for a filter cloth walking type filter press, and relates to the technical field of solid-liquid separation equipment automation control, and the method comprises the following steps: S100, constructing a cleaning control topological structure, grouping filter cloth according to the number of the filter cloth, configuring a corresponding cleaning solenoid valve and a cleaning nozzle for each group, the valve opening sequence table is connected to a cleaning pump through a cleaning pipeline, and meanwhile, a set of valve opening sequence table for all groups is generated. The filter cloth is grouped, the cleaning valves and the nozzles are independently controlled, and real-time parameter calculation and alternate valve opening logic are combined, so that accurate scheduling and balanced distribution of the cleaning area and frequency are realized. Through a walking counting and condition judgment mechanism, cleaning is started according to needs, efficiency is improved, and energy consumption is reduced. A closed-loop control process of setting, judging, executing, alternating and recording is constructed, and the comprehensive technical effects of filter press cleaning rhythm stability, resource optimization, efficiency improvement, equipment service life prolonging and the like are achieved.

The utility model discloses a multi-filtering-form multifunctional sewage blocking treatment system for a riverway, which comprises a group of soft enclosures which are sequentially arranged along the riverway to form a plurality of independent water purification areas, floating plants and ecological plant floating beds are arranged in the soft enclosures, and a vertical bank slope automatic liftable river water body filtering device is arranged between the soft enclosures. According to the system disclosed by the utility model, through the innovative design of the filter cloth and the application of a plurality of soft enclosures, step-by-step filtration and regional division of a water body are realized, and the filtration efficiency is improved. Meanwhile, the system adopts a hydrophilic high polymer material and a super-hydrophobic high polymer material, and combines biological filtration and physical filtration, so that the water quality is effectively purified. The system is further provided with an in-situ functional treatment area, and the water treatment efficiency and effect are improved by planting aquatic plants and adding functional filler.

Mobile or stationary air filter (L) or room fan (RL) according to Figure 1, comprising an outer wall (5), a (2) for generating an airflow (3) which is guided through an air filter material (1.1), an air inlet (2.1) and an air outlet (2.2), wherein the air filter material (1.1) contains poly(styrenesulfonic acid) (sulfonic acid biocide) (1.3) cross-linked with divinylbenzene and / or an acidic salt (1.3.1) (sulfonic acid biocide salt) of the sulfonic acid biocide (1.3) with biocidal cations, wherein the sulfonic acid biocide (1.3) and / or sulfonic acid biocide salt (1.3.1)(i) are positively and / or materially bonded to and / or in inert carriers and, in the fixed state, are in direct contact with carrier materials (1.1.7) on and / or in which biocidal Metal microparticles of a mean particle size d50 of 0.1 µm to <1,000 µm are fixed, and / or (ii) with carrier materials (1.1.7) on and / or in which biocidal metal microparticles of a mean particle size d50 of 0.1 µm to <1.000 µm are fixed, are mixed; its use and methods for the production and environmentally friendly disposal of air filter materials (1.1).

Nonwoven material, self-supporting filter media and filters, such as residential and commercial air filters, are provided that comprise a plurality of fibers with a silicone-based coating. The silicone-based coating comprises a silicone compound having an add-on weight of at least about 1.0 gsm. The silicone-based coating increases the efficiency of the filter media at capturing contaminants, particularly contaminants in the E2 and E3 particle group range, without compromising other important characteristics of the filter, such as longevity, dust holding capacity, pressure drop or air permeability. In addition, the filter media allows for the production of self-supporting filters having a Minimum Efficiency Reporting Value of at least MERV 8 that are fully incinerable because they do not include a metal wire backing to hold the shape of the pleats.

The invention relates to the field of solid-liquid waste separation devices, in particular to a solid-liquid waste separation device for aluminum triphosphate production, which comprises a separation component, two support plates arranged on a plate-and-frame filter press, a plurality of filter plates arranged on the support plates, and a pair of extension plates arranged on the filter plates, the first electric sliding rail is arranged on the supporting plate, the switching block is arranged on the first electric sliding rail, and the plate pulling device is arranged on the switching block; the vibration component comprises a lifting assembly arranged on the plate pulling device, a guide assembly arranged on the plate pulling device, a one-way assembly arranged on the guide assembly, an impact assembly arranged on the plate pulling device and a transmission assembly arranged on the guide assembly; according to the multi-directional vibration filter plate, through multi-directional vibration, material cakes are prevented from being adhered to the filter plate, and waste of the material cakes during washing is avoided.

The invention relates to the technical field of mineralized filter elements, particularly provides a magnesium-containing mineralized filter material, a mineralized filter element and a preparation method of the mineralized filter element, and aims at solving the problem that the service life of the magnesium mineralized filter element is shortened due to the fact that the magnesium ion release speed of the existing magnesium mineralized filter element is too high. The magnesium-containing mineralized filter material comprises modified magnesium ore and modified dolomite, wherein the mass ratio of the modified magnesium ore to the modified dolomite is (0.25-6): 1. By controlling the ratio of the modified magnesium ore to the modified dolomite, the precipitation concentration and speed of magnesium ions in water can be controlled, so that the concentration of the magnesium ions in the water can meet user requirements, and the service life of a magnesium mineralization filter element can be prolonged.

A gas filter system including an outer filter element having a first filter medium arranged between a first end cap and a second end cap, and an inner filter element having a second filter medium arranged between a third end cap and a fourth end cap, wherein the first, third and fourth end caps are open, wherein the outer filter element is closed at the second end cap, wherein the first filter medium is arrangeable to surround the second filter medium, such that the outer filter element is sealed against the inner filter element between the second end cap and the fourth end cap.

The present invention is directed to a storm water storage system comprising:—a storm water collection well (1) having at least one inlet (2), (9) for storm water to enter the storm water collection well (1); and one or more outlets (3) for storm water to exit the storm water collection well (1);—one or more void channels (4) each having a bottom surface, an upper surface and side surfaces, wherein each void channel extends away from and is in fluid communication with at least one outlet (3) and has a width in the range of 20 cm to 200 cm;—a storm water buffer system (5) comprising man-made vitreous fibres (MMVF) bonded with a cured binder composition, wherein the storm water buffer system encloses and is in fluid communication with at least one side surface of the one or more void channels (4);—a lid (6) positioned on top of the storm water buffer system (5) such that the upper surface of the void channel is formed by the lid (6).