WO2013046215A1 - Dispositif de dosage de produits chimiques - Google Patents

Dispositif de dosage de produits chimiques Download PDF

Info

Publication number
WO2013046215A1
WO2013046215A1 PCT/IN2012/000403 IN2012000403W WO2013046215A1 WO 2013046215 A1 WO2013046215 A1 WO 2013046215A1 IN 2012000403 W IN2012000403 W IN 2012000403W WO 2013046215 A1 WO2013046215 A1 WO 2013046215A1
Authority
WO
WIPO (PCT)
Prior art keywords
chemical
liquid
water
fluid chamber
dosing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IN2012/000403
Other languages
English (en)
Inventor
Dilshad Ahmad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tata Consultancy Services Ltd
Original Assignee
Tata Consultancy Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tata Consultancy Services Ltd filed Critical Tata Consultancy Services Ltd
Publication of WO2013046215A1 publication Critical patent/WO2013046215A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • B01F21/22—Dissolving using flow mixing using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/687—Devices for dosing solid compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/688—Devices in which the water progressively dissolves a solid compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00182—Controlling or regulating processes controlling the level of reactants in the reactor vessel
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges

Definitions

  • the present subject matter relates, in general, to dosing of a chemical in a liquid and, in particular, to a device for automatic dosing of the chemical into the liquid.
  • Liquids such as water
  • these processes usually require enhancing the quality of the liquid to achieve better results by, for example, adding chemicals.
  • drinking water may be purified by adding various chemicals, such as chlorine, aluminum hydroxide, and magnesium oxide to make the water suitable for drinking.
  • chemicals such as detergents are added in water to facilitate efficient washing of clothes, for example, in households or laundry industry.
  • the amount of chemical added in the liquids is usually controlled. Consistent and controlled dosing of chemicals in a liquid is thus of both domestic and industrial importance.
  • the chemical is dosed in the liquid using dosing devices configured to dose a controlled amount of the chemical in the liquid.
  • the dosing devices generally include various electrical components, such as water pumps, solenoid valves, and controllers, and are thus costly and also bulky in size. Further, using the electrical components also leads to an increase in operational and maintenance costs as these electrical components usually require regular maintenance.
  • a device for dosing of a chemical in a liquid includes a fluid chamber and a dosing unit coupled to the fluid chamber.
  • the fluid chamber is configured to receive the liquid and comprises a regulating means configured to regulate a level of the liquid in the fluid chamber.
  • the dosing unit is configured to release a predetermined amount of the chemical in the liquid when the liquid flowing through the fluid chamber reaches a predetermined level to come in contact with a bottom contact surface of the dosing unit
  • Figure 1 illustrates an apparatus for dosing a chemical into a liquid, according to an embodiment of the present subject matter.
  • Figure 2 illustrates a device for dosing a chemical into a liquid, according to a first embodiment of the present subject matter.
  • Figure 3 illustrates a device for dosing a chemical into a liquid, according to a second embodiment of the present subject matter.
  • Figure 4 illustrates a device for dosing a chemical into a liquid, according to a third embodiment of the present subject matter.
  • Figure 5 a device for dosing a chemical into a liquid, according to a fourth embodiment of the present subject matter.
  • Figure 6 illustrates a graph depicting performance of a device for dosing a chemical into a liquid, in accordance with the first embodiment of the present subject matter.
  • Figure 7 illustrates a graph depicting performance of the device, in accordance with the fourth embodiment of the present subject matter.
  • Controlled dosing of chemicals in water is thus of high importance, and various methods and systems have been employed to dose the chemicals into water.
  • Typical dosing devices include various electrical components such as water pumps, solenoid valves, and controllers, and are thus costly and also bulky in size.
  • Other conventional devices use microprocessors, such as sensors, to measure a concentration of chemicals in the water and a circuitry to control a dosing rate of the chemical based on the concentration.
  • Similar controlled dosing devices may also be used for adding chemicals to other liquids, for example, while adding additives to crude oil and petroleum products.
  • an apparatus for dosing chemicals into a liquid includes a dosing device, interchangeably referred to as a chemical doser, with an inlet and an outlet.
  • the inlet is used for receiving a liquid such as water from one or more water sources.
  • the inlet may be connected to a reservoir of the liquid.
  • the liquid is subsequently received by the chemical doser for dosing the chemical.
  • Dosed liquid i.e., liquid dosed with a chemical, exits from the chemical doser through the outlet.
  • the chemical doser releases a controlled amount of the chemical at a predetermined rate so as to ensure that the concentration of the chemical is maintained in a predetermined range in the dosed liquid.
  • the explanation of the embodiments will be provided with respect to the liquid being water. However, it will be understood that embodiments and implementations described herein can be used for controlled dosing of any suitable chemical in any liquid.
  • the chemical doser includes a dosing unit, a fluid chamber, and a mixing chamber.
  • the dosing unit is configured to store and release a predetermined amount of the chemical into the water to receive dosed water, i.e., water dosed with a chemical.
  • the fluid chamber is coupled to the dosing unit and is configured to regulate the level of the water so as to ensure that the concentration of the chemical is maintained in a predetermined range in the dosed water for variable flow of water through the chemical doser.
  • the water to be dosed with the chemical first enters into the fluid chamber.
  • the fluid chamber regulates the level of the water such that at a predetermined level the water comes in contact with a bottom contact surface of the dosing unit.
  • the dosing unit begins dosing of the chemical into the water.
  • the water along with the chemical subsequently exits the fluid chamber and enters the mixing chamber, where the chemical is uniformly mixed with the water to achieve uniform concentration of the chemical in the dosed water coming out of the water mixing chamber.
  • water level Attenuates to a predetermined value ensuring that a predetermined amount of the chemical is being mixed with the water.
  • the water level in the fluid chamber With increase in flow rate of water, the water level in the fluid chamber also rises, which in turn increases an amount of the chemical dosed by the dosing unit.
  • the dosing unit As soon as the inflow of the water decreases, the water level in the fluid chamber falls below the predetermined level.
  • the dosing unit and the water are thus no more in contact due to which the dosing unit stops the dosing of the chemical in the water.
  • the dosing unit is thus configured to dose the chemical in accordance to the flow rate of the water and stops the dosing in absence of or in case of a decrease in the flow rate of the water. Additionally, the dosing unit doses the chemical into the water with variable flow rate so as to maintain a predefined concentration of the chemical into the dosed water irrespective of the flow rate of the water entering the fluid chamber.
  • Figure 1 illustrates an apparatus 100 for dosing a chemical into a liquid, according to an embodiment of the present subject matter.
  • the apparatus 100 includes a source container 102 for storing liquid, such as water that needs to be mixed with the chemical, a dosing device 104 for dosing the chemical in the liquid to provide dosed liquid, and a collection container 106 for receiving the dosed liquid.
  • the dosing device 104 may be connected to the source container 102 in a leak proof manner.
  • the chemical may be any of a hygroscopic chemical, a non-hygroscopic chemical, a crystalline chemical, and an amorphous chemical.
  • the chemical examples include, but are not limited to, an aluminium salt, such as aluminium acetate, aluminium chloride, aluminium hydroxide, aluminium sulphate, aluminium nitrate, and aluminium carbonate, or an iron salt, such as ferric bromide, ferrous carbonate, ferrous chloride, ferrous hydroxide, ferrous sulphate, ferrous oxalate, ferric sulphate, and ferric chloride.
  • the chemical used for dosing can also be used in the form of a chemical composition, such as a mixture of two or more of the aforementioned chemicals, a detergent composition, a pH conditioner, and a water softener.
  • a chemical composition such as a mixture of two or more of the aforementioned chemicals, a detergent composition, a pH conditioner, and a water softener.
  • Water from any source such as ground water and other surface water sources may be poured in to the source container 102 through a water inlet 108 for mixing with the chemical for various household and industrial purposes, such as purification.
  • the water from the source container 102 then enters the dosing device 104 as shown by an arrow 1 10.
  • the dosed water, having the chemical mixed in a predetermined amount may then flow into and get collected in the collection container 106 as shown by an arrow 1 12.
  • the collection container 106 is provided with an outlet, such as a tap 114 from which the purified water may be drawn for consumption.
  • the dosing device 104 can be used for dosing chemicals in water running in a passage without altering pressure and flow rate of the running water.
  • the dosing device 104 interchangeably referred to as the chemical doser 104 includes a dosing unit 116, a fluid chamber 118, and a mixing chamber 120.
  • the dosing unit 116 is configured to store and release a predetermined amount of the chemical into the water to receive the dosed water.
  • the dosing unit includes a chemical storage (not shown in this figure) to store the chemical and a doser (not shown in this figure) coupled to the chemical storage to receive the chemical from the chemical storage and release the chemical in the water.
  • the fluid chamber 1 18 is coupled to the dosing unit 1 16 and is configured to ensure regular dosing of the chemical in the dosed water for variable flow and pressure of water through the chemical doser 104.
  • the fluid chamber 118 includes a breathing mechanism (not shown in this figure) to maintain uniform pressure inside the dosing unit and a regulating means (not shown in this figure).
  • the regulating means is configured to regulate the level of the water such that at a predetermined level the liquid comes in contact with the dosing unit 1 16 to receive the predetermined amount of the chemical.
  • Water from the fluid chamber 118 along with the chemical dosed by the dosing unit 116 is subsequently received by the mixing chamber 120.
  • the chemical is mixed with the water so as to achieve a uniform concentration of the chemical in the dosed water coming out of the mixing chamber 120 and into the collection container 106.
  • the water In operation, as the water enters into the chemical doser 104 the water initially gets collected in the fluid chamber 1 18. As the water starts collecting, the water level (not shown in the figure) increases inside the fluid chamber 118 and starts touching a bottom contact surface (not shown in the figure) of the chemical doser 104, making the chemical doser 104 release the chemical. With the increase of the water level, the regulating means starts draining out the water along with the chemical from the fluid chamber 118 to the mixing chamber 120 to regulate the predetermined level of the water in the fluid chamber 118. With further increase of the water level, outflow of the water and the chemical in the mixing chamber 120 also increases.
  • the water level attenuates to a predetermined level ensuring that a predetermined amount of the chemical is mixed with the water.
  • the water level further increases inside the fluid chamber 118.
  • the water starts entering the dosing unit 1 16, thus increasing the surface of the dosing unit 1 16 in contact with the water, which in turn increases the amount of the chemical dosed in the water.
  • Rate of flow of water entering the fluid chamber 118 thus controls the increase of water level and in turn the amount of the chemical dosed in the water.
  • the dosing unit 1 16 is thus configured to dose the chemical in accordance to the flow rate of the water and stops the dosing in absence of or in case there is a substantial decrease in the flow rate of the water. Additionally, the dosing unit 1 16 doses -the chemical into the water with variable flow rate so as to maintain a the concentration of chemical into the dosed water in a predetermined range irrespective of the flow rate of the water entering the fluid chamber 118.
  • Figure 2 illustrates components of the chemical doser 104 for automatic and metered dosing of a chemical into a liquid, according to a first embodiment of the present subject matter.
  • the chemical doser 104 includes the dosing unit 1 16, the fluid chamber 1 18, and the mixing chamber 120.
  • the dosing unit 116 includes a chemical cartridge 202, as a chemical storage, containing the chemical, and a doser 204 to release a predetermined amount of the chemical into the liquid.
  • the Figure 2 has been described in considerable detail with respect to water, it will be understood that the chemical doser 104 can be used to dose a chemical in any liquid.
  • the chemical cartridge 202 includes the chemical soaked in a fibrous matrix 206.
  • the chemical can be any hygroscopic or non-hygroscopic in nature such as sodium bisulfate, poly aluminum chloride, aluminum sulfate, ferric chloride and ferric sulfate in the form of granules, powder or paste. Further, the chemical may be provided in the form of granules, powder, or paste.
  • the fibrous matrix 206 may be a fiber composed of a fabric, mesh, foam, cotton, felt, nylon, polypropylene, polyamide, and polyester. In one implementation, diameter of the felt fiber used for the fibrous matrix 206 is in the range of about 5 micrometer ( ⁇ ) to 100 ⁇ .
  • the chemical cartridge 202 holds the fibrous matrix 206 soaked in the chemical and allows a controlled release of the chemical through it. Further, the amount of the chemical soaked in the fibrous matrix 206 is determined based upon predefined conditions.
  • the predefined conditions include, for example, the concentration of the chemical desired to be dosed in the water and amount of the water to be dosed with the chemical.
  • the chemical cartridge 202 may be of any shape including, but not limited to, a circular, square, elliptical, and cylindrical shape.
  • the dosing unit 116 is kept inside a casing 208 to make the chemical doser 104 leak proof.
  • the casing 208 includes a dosing inlet 210 for receiving the water from a source of water and the .. dosing outlet 212 to provide the dosed water.
  • the casing 208 further includes a breathing orifice 214 to maintain equal pressure between the dosing unit 116 and the fluid chamber 118 so that the device can also operate under variable pressure flow.
  • the breathing orifice 214 has a diameter in the range of about 1 millimeter (mm) to 3 mm.
  • the doser 204 is attached to the chemical cartridge 202 such that it receives one end of the fibrous matrix 206.
  • the fibrous matrix 206 thus establishes a physical link between the doser 204 and the chemical cartridge 202 facilitating transfer of the chemical to the doser 204 for being dosed in the water.
  • the doser 204 is in the shape of a circular cylinder and is provided with a slanting tip 216 having an elliptical cross section. The slant of the slanting tip 216 is made in such a way that the amount of the chemical dosed in the water varies in proportion to the flow rate of the water into the chemical doser 104.
  • Varying the amount of the chemical in proportion to the flow rate of the water helps in ensuring that a controlled amount of the chemical is dosed, in the water.
  • height of the doser 204 and area of the slanting tip 216 in contact with the water may also be varied in order to vary the amount of the chemical released in the water.
  • the height of the doser 204 varies from 2 centimeter (cm) to 4 cm.
  • height of the slanting tip 216 varies in the range of about 0.5 cm to 2 cm.
  • the fluid chamber 118 is provided such that it houses the doser 204.
  • the fluid chamber 118 is configured to regulate the water level of the water flowing in through the fluid chamber 1 18 in order to control the area of the slanting tip 216 dipped in the water.
  • the fluid chamber 1 18 includes regulating means such as orifices 218-1 , 218-2, and 218-3, hereinafter collectively referred to as regulating orifices 218.
  • the regulating orifices 218 are provided to drain out water from the fluid chamber 1 18 into the mixing chamber 120 in order to maintain a desired rate of flow of the water in the fluid chamber 118.
  • the regulating orifices 218 thus also work as water outlet for the fluid chamber 118.
  • diameter of the orifices 218-1 is much smaller than the diameter of the dosing inlet 210. This difference in diameters results in accumulation and rise of level of water inside the fluid chamber 118. At larger flow rate the orifices 218-2 and 218-3 also start working as water outlets thus controlling the level of water inside the fluid chamber 1 18. The rise of water level in the fluid chamber 1 18 is controlled in such a way that the area of the slanting tip 216 dipped in the water is proportional to the flow rate of the water. Controlling flow rate of the water and the area of the slanting' tip 216 dipped in the water ensures proportional increase in amount of the chemical dosed in the water.
  • concentration of the chemical in the dosed water may be maintained in a predetermined range irrespective of the flow rate and water level of the water.
  • the water along with the chemical drained by the regulating orifices 218 is received by the mixing chamber 120.
  • the mixing chamber 120 mixes the chemical with the water so as to achieve uniform concentration of the chemical in the dosed water received from the dosing outlet 212 as shown by an arrow 220.
  • the water to be dosed is received by the chemical doser 104 via the dosing inlet 210 as shown by an arrow 222.
  • the water subsequently enters into and gets collected in the fluid chamber 118.
  • the water level (not shown in the figure) increases inside the fluid chamber 118.
  • the water starts touching a bottom contact surface, i.e., the slanting tip 216 of the dosing unit 1 16, making the doser 204 release the chemical.
  • the outflow of the water through the orifice 218-1 also increases.
  • the water level attenuates to a predetermined value ensuring that a predetermined amount of the chemical is being mixed with the water.
  • the water level further increases inside the fluid chamber 118 until it reaches the orifices 218-2 and 218-3.
  • the orifices 218-2 and 218-3 also start acting as outlets and drain the water into the mixing chamber 120. This increases the rate of total outflow from the fluid chamber 1 18 and thus controls the increase of water level in a desired fashion.
  • the bottom most portion of the slanting tip 216 is placed just above the orifice 218-1.
  • the water level increases and the slanting tip 216 starts touching rising water as soon as the water reaches the predetermined level.
  • the water level increases and hence the area of the slanting tip 216 in contact with the water also increases.
  • the water level is thus controlled in such a way that the contact area of the slanting tip 216 is proportional to the inflow rate of water into the fluid chamber 118.
  • the doser 204 is also filled with the fibrous matrix
  • the doser 204 stops dosing of the chemical as soon as the water level goes below the predetermined level.
  • the chemical doser 104 is thus configured to be synchronized with the flow of the liquid such that the chemical doser 104 starts and stops dosing of the chemical in accordance with the flow of the liquid.
  • Figure 3 illustrates components of the chemical, doser 104 for automatic and metered dosing of a chemical into a liquid, according to a second embodiment of the present subject matter.
  • the chemical doser 104 includes the chemical in a crystal or a powder form.
  • the chemical doser 104 includes the dosing unit 1 16, the fluid chamber 118, and the mixing chamber 120.
  • the dosing unit 1 16 includes a container 302 to store the chemical and the doser 204 having the fibrous matrix 206.
  • the doser 204 is attached to the container 302 in such a way that the chemical is always in a physical contact with the fibrous matrix 206 of the doser 204.
  • the fluid chamber 1 18 and the mixing chamber 120 are similar to the embodiment described in the figure 2.
  • the fluid chamber 118 thus includes the regulating means such as the regulating orifices 218 to regulate level of the liquid in the fluid chamber 118 such that at a predetermined level the liquid comes in contact with a bottom contact surface of the dosing unit 1 16 to receive the predetermined amount of the chemical.
  • the Figure 3 has been described in considerable detail with respect to water, it will be understood that the chemical doser 104 can be used to dose a chemical in any liquid.
  • the water to be dosed is received by the chemical doser 104 via the dosing inlet 210 as shown by the arrow 222.
  • the water subsequently enters into and gets collected in the fluid chamber 118.
  • the water level (not shown in the figure) increases inside the fluid chamber 1 18.
  • the water starts touching a bottom contact surface, i.e., the slanting tip 216 of the dosing unit 1 16, making the doser 204 release the chemical.
  • the water starts rising inside the doser 204 via the capillary tubes formed in the fibrous matrix 206.
  • the portion of the fibrous matrix 206 touching the chemical gets wet.
  • the chemical touching the wet fibrous matrix 206 subsequently starts dissolving in the vicinity of the fibrous matrix 206 and the container 302.
  • the dissolved chemical gets diffused in the fibrous matrix 206 and reaches to the slanting tip 216.
  • the chemical reaching the slanting tip in turn 216 gets released into the water touching the slanting tip 216 in the fluid chamber 118.
  • the water along with the chemical enters the mixing chamber 120 that mixes the chemical with the water so as to achieve uniform concentration of the chemical in the dosed water received from the dosing outlet 212 as shown by the arrow 220.
  • the water level in the fluid chamber 118 is controlled using the same mechanism as discussed in the first embodiment of the chemical doser 104 described in the figure 2.
  • the dissolution of the chemical in the container 302 and releasing of the dissolved chemical into the water keeps on happening as long as the water remains in contact with the slanting tip 216.
  • the chemical doser 104 is thus configured to be synchronized with the flow of the liquid such that the chemical doser 104 starts and stops dosing of the chemical in accordance with the flow of the liquid. Further, providing the chemical in the form of crystals or powder makes the chemical doser 104 compact as the fibrous matrix 206 are now only provided in the doser 104.
  • Fig. 4 illustrates components of the chemical doser 104 for automatic and metered dosing of a chemical into a liquid, according to a third embodiment of the present subject matter.
  • the chemical doser 104 includes the chemical in a crystal or a powder form.
  • the chemical doser 104 includes the dosing unit 1 16, the fluid chamber 118, and the mixing chamber 120.
  • the dosing unit 116 includes the container 302 to store the chemical, the doser 204 having the fibrous matrix 206, a disc 402 in contact with the chemical for compressing the chemical towards the fibrous matrix 206.
  • the disc 402 is supported by a spring 404 placed near the top surface of the container 302.
  • the doser 204 is attached to the container 302 in such a way that the chemical is always in a physical contact with the fibrous matrix 206 of the doser 204.
  • the disc 402 keeps the chemical compressed to ensure that a proper physical contact is maintained between the fibrous matrix 206 and the chemical. Further, as the chemical gets consumed, the spring 404 starts expanding, pushing the disc 402 and the chemical downwards. This gives an indication of unused amount of the chemical and thus acts as a life indicator of the chemical doser 104. Providing an indication of the unused amount of the chemical doser 104 helps in ensuring that the chemical doser 104 is not used beyond a safe prescribed limit The mechanism of the dissolution of the chemical and dosing of the chemical into the water is similar to the embodiment of the chemical doser 104 as described in the figure 3..
  • Figure 5 illustrates components of the chemical doser 104 for automatic and metered dosing of a chemical into a liquid such as water, according to a fourth embodiment of the present subject matter.
  • the chemical doser 104 includes the dosing unit 1 16, the fluid chamber 118, and the mixing chamber 120.
  • the dosing unit 1 16 includes a chemical releasing component 502 provided inside a doser 504.
  • the doser 504 is provided with a perforated contact plate 506 at the bottom surface to release a predetermined amount of the chemical in the water.
  • the perforated contact plate 506 helps water to reach to the bottom most chemical releasing component 502 to dissolve it from a bottom surface.
  • the chemical releasing component 502 is composed of the chemical intended to be dosed into the water, additives, binders and lubricants made in the form of a tablet by compressing at high pressure or in the form of a candle cast in a mould and dried at a suitable temperature to obtain a structural integrity.
  • the additive include, but are not limited to, calcium hydroxide, calcium oxalate, calcium phosphate, D-galactose, magnesium carbonate, magnesium hydroxide, magnesium phosphate, magnesium oxalate or any combination thereof, and starch such as maize starch, potato starch etc.
  • the chemical releasing component 502 is made in the form of a tablet composed of a chemical such as aluminum sulphate in the range of about 60% to 80% by weight, mixed with an additive such as maize starch in the range of about 20% to 40% by weight.
  • a dry mixture thus obtained is compressed at pressure of about 1 ton to 5 tons for a time period of about 1 minute to 10 minutes in a suitable tablet press.
  • the resulting tablet is ready to be used in the dosing unit 116.
  • the chemical releasing component 502 is made in the form of a candle composed of a chemical such as aluminum sulphate in the range of about 60% to 80% by weight, mixed with an additive such as maize starch in the range of about 20% to 40% by weight.
  • a suitable amount of water is added to a dry mixture thus obtained and molded in a die under a suitable pressure ranging from about 70 kilograms (kg) to 200 kg.
  • the resulted candle is dried till the structural integrity is obtained.
  • the resulting candle is ready to be used in the dosing unit 116.
  • the fluid chamber 118 is provided such that it houses the doser 504.
  • the fluid chamber 118 is configured to regulate the flow rate of the water flowing in through the fluid chamber 1 18 in order to control the chemical dipped in the water.
  • the fluid chamber 118 includes regulating means such as a siphon tube 508.
  • the siphon tube 508 controls the filling and emptying of the fluid chamber 118 thus regulating level of the water in the fluid chamber 1 18 such that at a predetermined level the water comes in contact with a bottom contact surface of the chemical composition 502, i.e., the face of the chemical composition 502 touching the perforated contact plate 506 of the dosing unit 116 to receive a predetermined amount of the chemical.
  • the fluid chamber 1 18 further includes a dosing inlet 510 to receive water to be dosed with the chemical, a dosing outlet 512 to provide the dosed water, and a breather tube 514 to maintain equal pressure between the fluid chamber 1 18 and the mixing chamber 120 thus facilitating the operation of the dosing device 104 at variable pressure of the water flow.
  • the water to be dosed is received by chemical doser 104 via the dosing inlet 510 as shown by an arrow 516.
  • the water subsequently enters into and gets collected in the fluid chamber 118.
  • the water level (not shown in the figure) increases inside the fluid chamber 118.
  • the water starts entering into the siphon tube 508 via a siphon inlet 518.
  • the water level keeps on rising within the fluid chamber 1 18 till it reaches up to the top of the siphon tube 508.
  • the dosing unit 1 16 is placed inside the fluid chamber 118 such that the perforated contact plate 506 is little below the maximum height of the water level in the fluid chamber 118 and the siphon tube 508.
  • the water starts touching the perforated contact plate 506.
  • a predetermined level i.e., just below the top of the siphon tube 508
  • the water starts touching the perforated contact plate 506.
  • the perforated contact plate 506 it enters into dosing unit 116 and touches the bottom most chemical releasing component 502 from its bottom surface, making the doser 204 release a predetermined amount of the chemical into the water.
  • the siphon tube 508 starts draining the water from the fluid chamber 118 to the mixing chamber 120 through a siphon outlet 520 at a high flow rate.
  • the siphon tube 508 drains water from the fluid chamber 118, the water level comes down and when water level is below the predetermined level, it stops touching the perforated contact plate 506, thus stopping the further dissolution of the chemical releasing component 502.
  • the water along with the chemical drained by the siphon tube 508 is received by the mixing chamber 120.
  • the mixing chamber 120 mixes the chemical with the water so as to achieve uniform concentration of the chemical in the dosed water received from the dosing outlet 512 as shown by an arrow 522. Further, as the inflow of the water into the fluid chamber 1 18 stops, the water level starts decreasing. Consequently, the doser 504 stops dosing of the chemical as soon as the water level goes below the predetermined level. As the inflow of the water into the fluid chamber 1 18 resumes, the water level starts rising and comes in contact with the perforated contact plate 506, thus restarting the. dosing of the chemical into the water, thus making the chemical dosing process consistent and automatic.
  • the chemical doser 104 is thus configured to be synchronized with the flow of the liquid such that the chemical doser 104 starts and stops dosing of the chemical in accordance with the flow of the liquid.
  • FIG. 6 illustrates a graph depicting performance of a dosing device, such as the dosing device 104, in accordance with the first embodiment of the present subject matter.
  • the graph 600 shows the results obtained after experiments were performed for testing performance of the dosing device 104 as a pH conditioner for conditioning pH of water.
  • the pH conditioner was tested using 72 liters of untreated water having a pH level of about 8.
  • the acidic salt used for dosing and the pH change was measured using known methods of measuring pH of water.
  • a total amount of the untreated water, in liters, passed through the pH conditioner is taken as a reference position and is represented along a horizontal axis 602.
  • Vertical axis 604 represents the pH value of the untreated water and the dosed water, while the flow rate of the untreated water through the pH conditioner is represented on a vertical axis 606.
  • Curve 608 represents pH level of the untreated water provided to the pH conditioner.
  • Curve 610 depicts pH level of the dosed water received after adjusting the pH level of the untreated water.
  • Curve 612 depicts flow rate of untreated water through the pH conditioner.
  • the graph 600 shows that the pH level in the dosed water is about 5.5 to 7.5 and is consistent across variable flow rates ranging from 2 liters per hour to 7 liters per hour.
  • Figure 7 illustrates a graph depicting performance of a dosing device, such as the dosing device 104, in accordance with the fourth embodiment of the present subject matter.
  • the dosing device 104 is supplied with about 400 liters of water having negligible sulphate into it.
  • An aluminum sulphate candle is used for dosing of aluminum sulphate into the water and dosing is measured by measuring sulphate concentration in the output water using known methods of sulphate measurement.
  • a total amourit of water, in liters, passed through the dosing device 104 is taken as a reference position and is represented along a horizontal axis 702.
  • Vertical axis 704 represents sulphate ion concentration in the water.
  • Curve 706 represents sulphate ion concentration in the chemical dosed water.
  • the sulphate ion concentration in the chemical dosed water is in the range of about 300 to 350 parts per million (ppm) across the predicted life of the chemical candle except at the start and end of the dosing process. Further, the dissolution of the sulphate ions stabilizes at the beginning of the dosing process, i.e., when the chemical candle is new, and tapers off at end of dosing process, i.e., when the chemical candle is dissolved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un dispositif (104) pour le dosage d'un produit chimique dans un liquide. Le dispositif (104) comprend une unité de dosage (116) et une chambre de fluide (118) couplée à l'unité de dosage (116). La chambre de fluide (118) est conçue pour recevoir le liquide et comprend un moyen de régulation conçu pour réguler le niveau de liquide dans la chambre de fluide (118). L'unité de dosage (116) est conçue pour libérer une quantité prédéterminée de produit chimique dans le liquide s'écoulant à travers la chambre de fluide (118) lorsque le liquide atteint un niveau prédéterminé pour venir en contact avec une surface de contact inférieure de l'unité de dosage (116).
PCT/IN2012/000403 2011-09-20 2012-06-07 Dispositif de dosage de produits chimiques Ceased WO2013046215A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2665MU2011 2011-09-20
IN2665/MUM/2011 2011-09-20

Publications (1)

Publication Number Publication Date
WO2013046215A1 true WO2013046215A1 (fr) 2013-04-04

Family

ID=47553303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2012/000403 Ceased WO2013046215A1 (fr) 2011-09-20 2012-06-07 Dispositif de dosage de produits chimiques

Country Status (1)

Country Link
WO (1) WO2013046215A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3277638A4 (fr) * 2015-04-01 2019-02-06 Spectrum Brands, Inc. Pastille retard et procédés s'y rapportant
CN113250649A (zh) * 2020-02-07 2021-08-13 四川维泰科创石油设备制造有限公司 一种井下封堵系统及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1113003A (fr) * 1953-11-11 1956-03-22 Benckiser Gmbh Joh A Dispositif de dosage pour le traitement de liquides en circulation avec des matières solides, solubles dans ces liquides
EP0489587A1 (fr) * 1990-12-06 1992-06-10 Control Chemicals (Proprietary) Limited Traitement de liquides
US5384102A (en) * 1993-07-28 1995-01-24 Ppg Industries, Inc. Chemical feeder
US6138703A (en) * 1999-11-24 2000-10-31 Ppg Industries, Ohio Chemical feeder
US6298871B1 (en) * 2000-12-15 2001-10-09 Ppg Industries Ohio, Inc. Chemical feeder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1113003A (fr) * 1953-11-11 1956-03-22 Benckiser Gmbh Joh A Dispositif de dosage pour le traitement de liquides en circulation avec des matières solides, solubles dans ces liquides
EP0489587A1 (fr) * 1990-12-06 1992-06-10 Control Chemicals (Proprietary) Limited Traitement de liquides
US5384102A (en) * 1993-07-28 1995-01-24 Ppg Industries, Inc. Chemical feeder
US6138703A (en) * 1999-11-24 2000-10-31 Ppg Industries, Ohio Chemical feeder
US6298871B1 (en) * 2000-12-15 2001-10-09 Ppg Industries Ohio, Inc. Chemical feeder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3277638A4 (fr) * 2015-04-01 2019-02-06 Spectrum Brands, Inc. Pastille retard et procédés s'y rapportant
US11111163B2 (en) 2015-04-01 2021-09-07 Spectrum Brands, Inc. Time-release tablet and methods
CN113250649A (zh) * 2020-02-07 2021-08-13 四川维泰科创石油设备制造有限公司 一种井下封堵系统及其使用方法
CN113250649B (zh) * 2020-02-07 2023-03-14 四川维泰科创石油设备制造有限公司 一种井下封堵系统及其使用方法

Similar Documents

Publication Publication Date Title
CA2639110C (fr) Salometre et ensemble de capteurs de debit
KR101075298B1 (ko) 이온교환장치의 제어방법
JP7154213B2 (ja) 軟水化装置及び軟水化装置の操作方法
CN107511056A (zh) 石灰石石膏湿法脱硫系统水质调控方法及调控装置
WO2012042530A1 (fr) Appareil pour la purification de l'eau
CN103274500A (zh) 一种软水机
US20170368482A1 (en) Multistage Fiber Filtering Apparatus Capable of Selectively Filtering
KR101942477B1 (ko) 이온교환수지 교체시기 판단 기능을 갖는 연수기
JP2009160585A (ja) イオン交換装置
CN120646963A (zh) 核电厂凝结水精处理用树脂评价装置
WO2013093944A2 (fr) Dispositif de dosage de produits chimiques
CN212685496U (zh) 一种用于车辆洗消的自动加药装置
JP3246507B2 (ja) イオン除去手段及びイオン除去方法
CN203307090U (zh) 一种软水机
CN209338125U (zh) 一种活性炭生产脱磷酸装置
CN217377474U (zh) 高硬度水主动成垢处理装置
RU2347751C2 (ru) Устройство для очистки сточной воды
CN211770426U (zh) 一种小型软水机盐水浓度保持系统
KR100696829B1 (ko) 연수기의 연수 농도 측정 장치
CN208287827U (zh) 一种反渗透膜清洗装置
CN113060804A (zh) 一种重金属工业有机废水处理设备
CN209885589U (zh) 一种可清洗管路的净水设备
US4468318A (en) Apparatus for the uninterrupted treatment of a liquid with ion exchange resins
CN211111189U (zh) 一种自动再生软水机
CN219670214U (zh) 一种具有缺盐提醒功能的软水装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12813524

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12813524

Country of ref document: EP

Kind code of ref document: A1