CZ300494A3 - Water treating process and circuit arrangement for making the same - Google Patents

Abstract

This method of treating water in swimming pools with a controlled circulation system is based on the fact that in one place of the circulation system, preferably in front of the filter, a diluted solution of hydro peroxide and a dirt coagulator is continually supplied. In another place of the circulation system, preferably behind the filter, in particular on the inlet into the swimming pool, sodium hypochlorite or chlorine is supplied. The connection of the circulation system for treating the water consists of a swimming pool bath tube (1) from which the piping (4) and (6) runs into the pump (5), the circuit through the piping (7), the filter (8) and through the piping (11) is connected back to the swimming pool bath tube (1). In the piping (7) between the pump (5) and the filter (8) there is an inlet (9) for the hydro peroxide solution and an inlet (10) for dirt coagulant and in the piping (11) behind the filter (8) there is an inlet (13) for the sodium hypochlorite and/or chlorine.<IMAGE>

Description

METHOD OF WATER TREATMENT AND CONNECTION TO IMPLEMENT THIS WAY

Technical field

The invention relates to a method of treating water in swimming pools and water tanks with a controlled circulation system, as well as to the connection of a circulating water treatment system for carrying out the method.

BACKGROUND OF THE INVENTION

Recreational use of water, whether for swimming or water sports, is currently of a mass character and one of the most used recreational facilities are swimming pools.

However, some problems related to the quality of pool water cannot be overlooked. The problem lies in the fact that the quality of the pool water is influenced by a number of circumstances, the most important of which is the high attendance on the one hand and the limited volume of water in the pool, albeit modified and treated on the other. Water is thus exposed to an extraordinary load which affects its physical, chemical properties, significantly affects microbial contamination and, in aggregate, the resulting water quality.

Bacteriological safety of the pool water is ensured by dosing the sodium hypochlorite solution (or chlorine) into the pool water by means of dispensers. The chlorine content is maintained in the range of 0.2 - 0.5 mg / liter, after operating hours the water is chlorinated by shock, ie a precisely measured, pre-tested dose of concentrated hypochlorite is poured into the pool. (Chlorine treatment increases chlorine performance.) Increased chlorine concentration destroys more resistant microorganisms and partially destroys (oxidizes) chlorine-nitrogen compounds. The amount of hypochlorite (chlorine) must be chosen so that its content spontaneously drops below 0.5 mg / l by the start of operation.

The method described should guarantee the maintenance of bacteriological safety according to Hygiene Regulation 48, Volume 41/78 and is commonly used in the Czech Republic and abroad, but has some undesirable side effects:

- chlorine odor annoying visitors and staff, ⁼ -corrosion has a negative effect on the 'metal parts' of water treatment plants, 'accelerates their corrosion.' The same applies to concrete structures.

- some strains of bacteria and viruses become resistant to the chlorine concentrations used,

- the concentration of salts in pool water, especially chlorides, is rapidly increasing. The solution is to increase the amount of make-up water or to drain the pool more often.

SUMMARY OF THE INVENTION

The essence of the method of water treatment in swimming pools and water tanks with controlled circulation system consists in that at one place of the circulation system a dilute solution of hydrogen peroxide is continuously supplied in an amount giving a final consumption in the range of 8 to 15 mg / l per day and at the same time in the second place of the circulation system, sodium hypochlorite and / or chlorine are continuously fed in amounts giving a final chlorine content in water of 0.2 to 0.3 mg / l, and a coagulant of impurities is continuously fed. Preferably, the diluted hydrogen peroxide solution and the coagulant of impurities are fed to the circulation system upstream of the filtering site and sodium hypochlorite or chlorine is fed to the circulation system downstream of the filtering site at the pool inflow.

Another object of the invention is to provide a water treatment circulating system comprising a swimming pool tub with an upper drainage channel connected to an accumulation well, from which a pipe to a pump is connected, to which a water drain pipe from the bottom of the pool is connected. another pipe, through a possible heater, back to the pool. The essence of this solution is that the inlet between the pump and the filter is connected to the inlet of hydrogen peroxide solution and the inlet of the coagulant of impurities and to the inlet after the filter is the inlet of sodium hypochlorite and / or chlorine.

The advantages of the invention compared to known processes and circulation systems are in particular

- high efficiency of the disposal of micro-organisms in the pool water, even at higher water temperatures,

- the chlorine odor in the pool area is significantly reduced,

- low acquisition and operating costs,

- extends the service life of metal and concrete structures.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in more detail with the aid of a drawing showing a circuit diagram of a water treatment system.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The circuit diagram of the circulating water treatment system shown in the figure consists of a pool tub 1 with an upper sampling trough 2 connected to an accumulation well 3. From the accumulation well 3, a conduit 4 leads to a pump 5 into which a &quot; Bottom bath water L ·

From the pump 5, the pipe 7 leads to the filter 8, with the inlet 9 of the hydrogen peroxide solution and the inlet 10 of the coagulant impurities leading to the discharge of the pump 5 before the filter 8. Pipes Π from the filter. via a heater 12 back to the pool tub 1, with a feed 13 of sodium hypochlorite and / or chlorine flowing into the conduit 11.

The water that flows from the pool tub 1 through the upper sampling trough 2 flows by gravity into the accumulation well 3. From there it is sucked by the pump 5 together with the water withdrawn from the bottom of the pool tub 1 via line 6 and pumped to filter 8. 8, the hydrogen peroxide solution is continuously supplied, and a coagulant of impurities, e.g. aluminum sulphate. The filtered water is passed through line 11 through the heater 12 back to the pool tub 1. Sodium hypochlorite and / or chlorine is supplied to line 11 via line 13. In this circulation system, the pool water is continuously circulated and freed of impurities introduced by bathers.

----- Example 2; Water treatment method --------—------ The 20 x 11 x 1.2 m pool tub has a volume of 264 m ^{3 of} water, another 30 m ³ _ ^r * of water is in the accumulation well 3 and with water in filter 8 and in the circulation pipe, it is approx. _________ 300 m ^{3 of} water. The consumption of 30% hydrogen peroxide is 3 kg per 24 hours, 10-10 mg / l corresponding to a water load of about 500 visitors per day and a water temperature of about 32 ° C. Hydrogen peroxide is diluted 1: 100 and is continuously fed into the circulation system at the point between pump 5 and filter 8. Aluminum sulphate is also added to the space between pump 5 and filter 8 as an impurity coagulant of about 2 kg per 24 hours .

The consumption of sodium hypochlorite, which is fed into the duct 11 at the inflow to the pool 1, is about 8 kg per day, i.e. about 26.6 mg / l of water, while maintaining the chlorine content in the water between 0.2 and 0.3 mg / l.

Alternatively, the pool water can be treated with chlorine gas, with 1.5 to 1.8 kg of chlorine being dosed per 300 m ^{3 of} water (i.e. 0.5-0.6 kg per 100 m ^{3 of} water).

The process of the present invention utilizes the combined disinfecting action of atomic oxygen in the state of hydrogen peroxide and chlorine decomposition, with particularly excellent results when the hydrogen peroxide solution is dosed before the filtering site and the hypochlorite solution is dosed into the circulation system downstream of the filtering site .

Even under a very heavy load on the pool water, for example. up to 500 visitors a day and a water temperature of 32 ° C (rehabilitation pool in the spa) the use of the process and the engagement according to the invention enabled the faecal colli bacteria to be destroyed continuously. Enterococci, psychrophilic and mesophilic microorganisms are kept at very low levels. Analyzes of water carried out by a microbiological laboratory showed satisfactory results in the long term.

Claims (3)

PATENT CLAIMS Process for the treatment of water in pools and reservoirs with a controlled circulation system, comprising the action of a solution of sodium hypochlorite and / or of chlorine and coagulant of impurities, characterized in that a dilute hydrogen peroxide solution is continuously supplied at one point of the circulation system in the range of 8 to 15 mg / l per day and at the same time in the second place of the circulation system, sodium hypochlorite and / or chlorine is continuously fed in amounts giving actual chlorine content in water in the range of 0.2 to 0.3 mg / l and further fed continuously coagulant of impurities. Treatment method according to claim 1, characterized in that the dilute hydrogen peroxide solution and the coagulant impurities are fed to the circulation system upstream of the filtering site and sodium hypochlorite and / or chlorine are fed to the circulation system downstream of the filtering site at the inflow to the pool. Connection of a circulation system for water treatment according to claims 1 and 2, consisting of a pool basin (1) with an upper drainage trough (2) connected to an accumulation well (3) from which a pipe (4) leads to a pump (5) where a line (6) for draining water from the bottom of the pool tub (1) is connected at the same time, from the pump (5) the line (7) leads to the filter (8) and therefrom via a heater (12) through the line (11) back to the pool characterized in that an inlet (9) of the hydrogen peroxide solution and an inlet (10) of the coagulant dirt is connected to the duct (7) between the pump (5) and the filter (8) and to the duct (11) downstream of the filter is an inlet (13) sodium hypochlorite and / or chlorine.