FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
AND
THE PATENTS RULES, 2003 COMPLETE SPECIFICATION
(See Section 10; Rule 13)
1. TITLE OF THE INVENTION:
"Ultra High Rate Clarifier"
2. APPLICANT:
(a) NAME: ION EXCHAGE (INDIA) LIMITED.
(b) NATIONALITY: AN INDIAN COMPANY INCORPORATE UNDER
THE COMPANIES ACT, 1956.
(c) ADDRESS: TIECICON HOUSE,
DR. E. MOSES ROAD, MAHALAXMI, MUMBAI-400 011, MAHARASHTRA, INDIA.
The following specification describes the nature of the invention and the manner in which it is to be performed:-
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Ultra High Rate Clarifier
3. PREAMBLE TO THE DESCRIPTION
Field of Invention
The present invention relates to ultra high rate clarifier.
Background of the Invention & the Related Art
It's a well known fact that clarifiers are used in treatment of water from different sources such as surface and waste water for removal of suspended solids in pretreatment section. Coagulant and other chemicals are used to develop flocks in the clarifier and get it removed when they settle at the bottom of the clarifier. These flocks when settled at the bottom of the clarifier are called sludge. The sludge is normally continuously removed from the clarifier.
In order to make it more versatile, a modified design of the clarifier is proposed by combining technologies of solid contact and lamella clarifier. By virtue of this combined advantages with enhanced performance at increased volumetric flow rate, better product quality is achieved.
4. DESCRIPTION OF THE INVENTION
In the ultra high rate clarifier unit, solid contact clarifier combines the mixing, flocculation and sedimentation in a single basin for reaction, flocculation, separation, sludge removal and clarification. All the processes take place in a single treatment basin for maximum treated water production in minimal space.
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The ultra high rate clarifier unit excels in treating the surface water and the ground water in applications such as turbidity removal, iron and manganese removal, colour removal, lime soda ash softening and excess silica removal. It also can be used for waste water clarification.
The working process of ultra high rate clarifier:
Ultra high rate clarifier carries out following operations in specific zones under normal working conditions:
• The Mixing Zone
• The Reaction - Flocculation Zone/Clarification Zone
• The Clarification Zone
• The Sludge Removal and Recirculation Zone
(Graphically described in the figure enclosed)
Figure enclosed is schematic diagram of ultra high rate clarifier. DRAWINGS - REFERENCE NUMERALS
1. Raw water feed pump.
2. Mixing zone.
3. Dosing pumps.
4. Impeller.
5. Feed water.
6. Bottom of the ultra high rate clarifier.
7. Scrapper.
8. Sludge removal and recirculation zone.
9. Sludge pump.
10. Sludge outlet.
11. Clarification zone.
12. Lamella plates.
13. Clarified water outlet.
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In ultra high rate clarifier, there is a raw water feed pump which is used to pump feed water in the mixing zone of ultra high rate clarifier at desired flow rate. There are dosing pumps which are used to dose chemicals such as lime, coagulant and flocculating agents like polymer in feed raw water in the mixing zone of ultra high rate clarifier. These chemicals are dosed to the feed raw water at desired rate.
There is an impeller in the mixing zone of ultra high rate clarifier which helps to mix the chemicals thoroughly in the feed water. With rising level of the feed raw water in the mixing zone due to functioning of the impeller within the mixing zone, the above referred chemicals and the feed raw water get mixed with each other. On contact of the above referred chemicals with suspended solids, turbidity and silica in the raw water, reaction takes place. Due to the chemical reaction, flocks formation takes place. As the water rises upwards at specific velocity at which ultra high rate clarifier unit is designed and due to continuous feeding of feed pump raw water and functioning of the impeller in the mixing zone, the above referred flocks formed convert into sludge. The sludge travels downwards towards the bottom of the ultra high rate clarifier and ultimately settles there. At the bottom of the ultra high rate clarifier, there is a scrapper which is continuously wiping the sludge from the bottom and putting the same in the sludge removal and recirculation zone. The said sludge is ultimately and continuously intermittently removed from the sludge removal and recirculation zone with the help of sludge pump through the sludge outlet.
In the meanwhile, water in the mixing zone travels downwards through the flocculation section and further moves upwards through the clarification zone. Within the clarification zone there are lamella plates which are placed and positioned in such a fashion that if any further solid impurities are left in the water, the same shall get removed due to said lamella plates. Further, the totally purified water moves out of the ultra high rate clarifier through clarified water outlet.
It is noteworthy here that, as the rise rate in the clarifier is adjusted by additional settling area provided by lamella plates and addition of the chemicals, the
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performance of the ultra high rate clarifier, does not get affected due to increase in suspended solids or higher flow rates. The results are consistent which may be monitored from time to time.
Advantages of Ultra High Rate Clarifier:
1. The ultra high rate clarifier is a combination of technique clarifiers such as clarifier and lamella clarifier in one product. Hence, it works even on higher flow rate and suspended solids.
2. The ultra high rate clarifier needs minimal space.
3. Due to combination of two techniques of clarification, the rate of chemical reaction of suspended solids and chemicals is high and needs less time to complete the reaction.
4. Even though there is fluctuation in the inlet suspended solids and flow rates, the performance of unit does not get affected.
5. The performance of ultra high rate clarifier is consistent.
6. The ultra high rate clarifier needs minimal space and can be operated for large flow rates as it is economical.
7. The working of ultra high rate clarifier is constant which leads to intermittently / continuous removal of sludge.
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5. We claim:
1. Ultra high rate clarifier.
2. Ultra high rate clarifier as claimed in claim 1, having a raw water feed pump being used to pump feed water in the mixing zone of ultra high rate clarifier at desired flow rate further there being the dosing pumps being used to dose chemicals such as lime, coagulant and flocculating agents like polymer in feed raw water in the mixing zone of ultra high rate clarifier and these chemicals being dosed to the feed raw water at a desired rate.

3. Ultra high rate clarifier as claimed in claim 1 & 2, there being an impeller in the mixing zone of ultra high rate clarifier helping to mix the chemicals thoroughly in the feed water and with rising level of the feed raw water in the mixing zone due to functioning of the impeller within the mixing zone, the above referred chemicals and the feed raw water getting mixed with each other and on contact of the above referred chemicals with suspended solids, turbidity and silica in the raw water, reaction taking place resulting into flocks formation, further, as the water being rising upwards at specific velocity at which ultra high rate clarifier unit being designed and due to continuous feeding of feed pump raw water and functioning of the impeller in the mixing zone, the above referred flocks formed converting into sludge, further the sludge traveling downwards towards the bottom of the ultra high rate clarifier and ultimately settling there.
4. Ultra high rate clarifier as claimed in claims 1, 2 & 3, at the bottom of the ultra high rate clarifier, there being a scrapper continuously wiping the sludge from the bottom and putting the same in the sludge removal and recirculation zone and the said sludge being ultimately and continuously
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intermittently removed from the sludge removal and recirculation zone with the help of sludge pump through the sludge outlet.
5. Ultra high rate clarifier as claimed in claims 1, 2, 3 & 4, the water in the mixing zone traveling downwards through the flocculation section and further moving upwards through the clarification zone, further within the clarification zone there being the lamella plates being placed and positioned in such a fashion that if any further solid impurities being left in the water, the same be getting removed due to said lamella plates, further, the totally purified water moving out of the ultra high rate clarifier through clarified water outlet.
6. Ultra high rate clarifier as claimed in claims 1, 2, 3, 4 & 5, as the rise rate in the clarifier being adjusted by an additional settling area provided by lamella plates and addition of the chemicals, the performance of the ultra high rate clarifier, not getting affected due to increase in suspended solids or higher flow rates.
Sanjeev Niphadkar,
Agent for the Applicant,
Ion Exchange (India) Limited.
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