GB2403947A

GB2403947A - Water chlorinating system

Info

Publication number: GB2403947A
Application number: GB0316460A
Authority: GB
Inventors: Ben David Tsur
Original assignee: MAPAL INTRO Ltd
Current assignee: MAPAL INTRO Ltd
Priority date: 2003-07-15
Filing date: 2003-07-15
Publication date: 2005-01-19
Also published as: GB0316460D0

Abstract

A drinking water chlorinating system comprising a container 12 for solid chlorine-containing substance in tablets 14 with a water nozzle 22 therein connectable to water mains, a settling chamber 16 disposed under the container, a feed chamber 18 in fluid communication with an upper part of the settling chamber, the feed chamber having an outlet connectable to a chlorinated water pipe 39 via a high-pressure pump, the container having water-permeable bottom 24 and being configured so that water emanating from the water nozzle washes the tablets and drips onto water surface in the settling chamber. Preferably, the feed chamber is adjacent the settling chamber and is separated therefrom by a wall 20 allowing overflow of water from the settling chamber thereby providing for said fluid communication.

Description

WATER CEILORDNAID!iG SYSTEM

FIELD OF TEIE INVENTION

This i.n.vention Plates to water chlorinating systems, more particularly to systems for chlorinating drinking water.

BACKGROIJD OF TlIE llVEtITION Facilities for samtn.g a water supply, such as vixning pool watt or drinking water, utilize solid chlorinating chemicals such as calcium hypochlorite in.

forte of pellets which are disposed in a chlonnadng assembly (feeder) Hat is in constant communication with the water. Water fiom the water supply is periodically fed into the chlorinating assembly so as to dissolve a portion of the solid chemical.

to Two types of chemical feeders are commonly used for dissolving calcium hypocblorite pellets. Ho erosion feeder immerses He pellets into a solution of water thereby allowing He water to dissolve He pellets. Alternatively, a feeder may spray water onto the pellets, either Dom above or below.

The water-chemical solution is then passed Dom He cblorinating assembly back into the water supply. He Dow of water Coin the water supply into the chlorinating assembly is periodically interrupted and then recommenced so as to deliver periodic infusions of the chlonnag solution to the water supply.

Obtaining proper dissolution of the chlorinating chemical and avoiding undesirable deposits or residues have posed problems in feeder design Particular problems exist avid the use of commercial calcium hypochlonte pellets which produce calcium carbonate deposits.

US 5,928,608 discloses a chlorinator assembly using internlittt spray for swimming pool or drinking water eabnent. The chlorinator assembly includes a chamber for holding a qv of solid dry chlorinating chemical in the fonn of briquettes or pellets. The watt spray impact arid dissolves the briquettes to a degree, and Me resulting solution Ells into a chamber below the spray. It is evacuated therefrom. Cough discb.arge/check valve assembly to a return line Cat leads back to the source of We water being chlorinated.

s IJS 6,045,706 describes a feeder for use in water treatment systems wherein.

a settle basin is disposed downstream of an erosion chant filled with calcium hypochlorite pellets. The calcium hypochlorite sol.udon is transposed born He erosion chamber through a solution guide pipe to Me bottom part of the settling basin. The solution is evacuated back to the water supply line from the same lo settling basin but from its upper part. The precipitate donned in the selling basin remans fluid arid does not form scale when fed to the injection point and allowed to flow through the water supply lines.

US6,497,822 discloses a feeder Using vortex Wow for Educing a chlorincontaining liquid chemical into a flow of water. The feeder teas first and Is second chambers. reservoir of chemical is positioned to direct the chemical into the body of water in the first charxber. nozzle sends water into the first chamber so as to produce vortex flow therein, thus encouraging dissolving of the chemical in the water body. A wall separates the first chamber few the second chamber and defines an outlet for overflmv to the second chamber. The water containing the to dissolved chemical is evacuated Trough an outlet in Me second chamber.

SUIARY OF TO I,IVENTION In accordance with Me present invention, there is provided a drinking water chlorinating system comprising a container for solid chlormcontaing substance in tablets win a water nozzle Herein connectable to water mains via a pressure :5 regulator, a sealing chamber disposed under the container, a feed chamber In fluid cornmuu ication with Me upper part of Be soling chamber. The feed chamber has an outlet connectable to a chlorinated Rear pipe via a high-pressure pump. The conner has wai:er permeable bottom and is conjured so Rat wan emanating frown said water nozzle washes said tablets and drips onto Rater surface in the so settling clamber. Me settling chamber is designed for accumulation of non-dissolved particles at its bottom, and composes a flushing nozzle adjacent Me bottom and a discharge pipe connected to We lowest part of the bottom. Preferably, Me feed chamber is adjacent the soling chamber and separated therefrom by a wale allowing overflow of. water.

The Feed chamber has a low-level sensor and a bith-level sensor, the water nozzle is connected to water mains via an electric stop-,ral.ve, and Me chlorinating system is equipped with an. automatic controller adapted to receive signals Dom Me sensors and to control the electric stop-valve so Mat the wet" level in Me feed chamber is nnauntained between Me hi-level sensor and Me low-level. sensor.

lo Preferably, a mechanical float valve is disposed in Me feed chamber and is connected in series with the electrical stop valve so as to stop the DOW MOUE the nozzle if Tic water levy in the feed chaxnber rises above the high-level sensor.

Additionally, an overflow drainage pipe is provided, with an inlet above the high-level. sensor.

is bypass water line wad a bypass valve may be connected in parallel avid Tic water nozzle SO as to feed a controllable quantity of water into the setding chamber bypassing said container.

Else chlorinating system of the present invention is adapted for use of solid but soluble chlorinating substances in tablet form such as calcium hypochlorite to which generally contain insoluble particles and may form hard scale. Ibe s cttlg chamber is designed so that nondissolved particles are not allowed to pass into the drinking water. They precipitate to the bottom of Me chamber and either continue to dissolve or are flushed frown the bottom through the discharge pipe. The sefflg chamber provides permanent level of the solution without undue sing, and as Redrawing the solution from the surface layer which is Bee Rom particles.

Conversely, the second, feeding chamber provides withdrawing of the solution from near die bottom so Hat variations of Me water level do not Interfere with the pumping.

Chlonnating substances in tablet form can be preserved in solid state for so very long time, contrary to concentrated solutions. Thus, the present chlorinating system. is especially advantageous for processing of dying water in remote regions win irregular supply periods.

BRIEF DESCRIPTION OF THE DRAWINGS

Lo. order to understand the invention and to see how it may be carried out us practice, a preferred embodiment will now be described, by way of non-limiting example only, win reference to the accompanying drawing, In which: F ig. 1 is a schematic layout of e water chlorinating system of the present invention.

DETAILED D1DSCRIPTJ.ON OF THE: INVENTION to With reference to Fig. 1, a driving water cblorting system 10 according to the present invention comprises a container 12 for chlorinating tables 14, a settling claamber 16 disposed under He container 12, a feed chamber 18 adjacent Ale settling chamber and separated from it by a wall 20 allowing overflow of water.

The container 12 has a water nozzle 22 therein, adapted to spray water over Is the tablets 14, arid perforated bottom 24 allowing water to drip onto the water surface in the settling chamber 16. The cblormating system 10 is connected to water mains 24 via an electric showoff valve 25 and a pressure regulator 27 adapted to reduce He mains pressure to about 2 ala. An inlet brancl, pipe 26 connects the pressure regulator 27 to the nozzle 22 via an electric valve 28 and a float valve 29 connected in series.

The settling chamber 16 has a descending bodom 30 designed for accumulation and flushing of non-dissolved particles 31. A flushing nozzle 32 win flush valve 33 is mound adjacent He bottom JO, and a discharge pipe 34 win a stop-valve 35 is connected to the lowest part of the bottom 30. A bypass line 36 Is with a bypass valve 37 is branched off the inlet pipe 26, allowing to supply water directly to He settle chamber 16. Another inlet branch pipe 26' feeds He nozzle 32.

The feed chamber 18 has also a descending bottom and an outlet 38 near the bottom's upper part. A discbe pipe 39 win discharge valve 40 Is connected to He lowest part of Me bottling. The outlet 38 is connected bulk to Me males pipe 24 via a high-pr.esse dosage puml? 42 and outlet pipe 44. Ihe float valve 29 has a Doat disposed in Me feed chamber. consumer of chlorinated drinking water 46, schematically sb.ovn, is connected to Me Wins 24 Via a stop-valve 41. The system s is equipped aim a moveable wa=-gun 48 for washing and is secured by an overflow discharge pipe 49 with art inlet just above the overflow wall 20.

Nile chlorinating system to is equipped win. a control system including an automatic controller 50' lovlevel sensor 52, hi.ghlevel sensor 54 and critical level sensor 56 disposed in. Me feed chamber 18, Dow detector 58 at the mains pipe 24, to and leak detector 59 on the overflow pipe 49. Controlled mechanisms are the dosage pump 42 and Me electric stovalve 28.

In operation, Me controller 50 opens die electric valve 28, and the Bourns water, passing Ma Me pressure regulator 27 arid the nozzle 22, sprays the cblorinating, tables 14. Is water dissolves part of the tablets and drips down on Me water surreal of Idle seeding chamber 16 m the form. of concentrated chlorinated solution. Non-disso1.ved particles 31 of the tablets settle on the bottoms 30 of the chamber while clear solution overflows the wall 20 arid pours into Me feed chamber 18. When Me water in die feed chamber 18 rims to We high-lel sensor 54, the controller 50 closes Me electric valve 28. The float valve 29 operates as a safety zo valve, closing Me inlet pipe 26 in case the water level in We feed chamber rises above the hi-level. sensor 54. In. case the coat valve fails, the surp1.us water is drained Trough the overflow pipe 49. This leak is detected by Me leak detector 59, andante controller 50 closes the shut-ovalve 25.

When the consumer 46 opens die valve 47 to consume chlorinated Grater, doe as flow detector 58 sends a signal to the conlroller 50. The controller operates We dosage pump 42 which raises the pressure in the oudet pipe 44 above the pressure m the finales and pumps chlorinated solutior. from the feed chamber outlet 38 into the s pipe 24. If Me solution level in Me feed chamber 18 falls Id" the lor-level sensor 52, the controller 50 again opens Me el.c valve 28. lf me so solution level falls fiber, to Me critical level sensor 56, the controller stops We dosage pump 42.

The concen.ahon of e solution in the settling chamber 16 may be adjusted by opening the bypass valve 37 to dilute the solution.

From time to tone, the discharge valve 35 and die Bush valve 33 are opened in order to flush out Me accumulated silt (particles) 31 by means of the nozzle 32 s through the discharge pipe 34. The water-gur 48 is used Bom time to slime far flushing and cluing bow chamber, We water Mom the feed chamber 18 bed drained Trough the discharge pipe 39.

The chlorinadug substance is in Me form of calcium hypochlonte tablets or pellets, which can be preserved solid state for a long time. Thus, the chlorinating lo system 10 is especially advantageous for production of chlorinated drinking water in remote regions with irregular supply Chlorinating chemicals.

Although a description of a specific embodiment has been presented, it is contemplated that various changes could be nude without deviating front the scope of Me present invention. For example, We present invention could be modified and Is used together with a cooling system or built into such system, Tic overflow was.

may be replaced by wide pipes, etc. 1l1AR1n-nd

Claims

CLAI1'IS: 1. A drinking water chlorinating system composing a container

for solid chlonncontaining substance in tablets with a water nozzle therem connectable to water mains, a settling; clamber disposed under said container, a feed chamber in s fluid communication win an upper past of said settling chamber. said feed chamber beving an oul:l.et connectable to a cllonnated water pipe via a 0th-pressure pump, said container having water-pneabl.e bottom and being configured so Hat water emanating Tom said water nozzle washes said tablets and drips onto watt surface in said settling chamber.

lo
2. The water chlorinating system of Claim 1, erein said feed chamber is adjacent said settling chamber and is separated therefrom, by a wall allowing overflow of water Dom said settling chamber Hereby providing Ad fluid coqnmunicati,on,
3. The water chlorinating system of Claim 1, wherein said water nozzle is Is connectable to water mains via a pressure regulator.
4. The water chlorinating system of Claim 1, wherem said settling chamber is designed for accumulation of oonissolved particles at its bottom' and comprises a flushing nozzle adjacent said bottom, and a discharge pipe connected to the lowest part of said bottom.

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5. The water chlorinating system of Claim 1, wherein said feed chamber has a low-level sensor and a high-level sensor, said math nozzle is connected to water mains via an electric stovalve, and said chlorinating system is equipped win an automatic controller adapted to receive signals from said sensors and to control said electric stop-valve so that He water level in He feed clamber is maintained 2s between Tic high-level sensor and Me lov-level sensor.
6. TO water chlorinating system of Claim s, wherein a mechanical float valve is disposed said feed chamber and is connected in series wad said electrical stop valve so as to stop the flow through said water nozzle if He wata level in the feed chamber rises above said high-level sensor.
7. The water chlonnadog system of Claim 5, further coTnposing an overflow pipe win an inlet disposed above said Jaigb-level sensor.
8. The water chlorinating system of Claun 1, wherein a bypass water line win a bypass valve is connected in parallel with said water nozzle so as to feed a s controllable quantity of water into said setding chamber be passing said container.