CZ281460B6 - 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

A method of water treatment and wiring for carrying out this method

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 the 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 being the high attendance on the one hand and the limited volume of pool water, 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 the 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,

- Over-chlorination has a negative effect on 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 more often to drain the pool.

Another method of disinfecting water is described in published European patent application EP 0 590 184. A water-soluble halogen compound and an oxidizing agent are added to the water, oxidizing the halogen ions in situ to a hypohalite while maintaining a pH preferably in the range of 7 , 0 to 7.5 S.

-1GB 281460 B6

Preferably sodium bromide and hydrogen peroxide are used. The disadvantage of this procedure is the high cost. In addition, bromine compounds are prohibited in the Czech Republic for the treatment of pool water.

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 point of the circulation system a dilute hydrogen peroxide solution is continuously supplied, resulting in consumption in the range of 8 to 15 mg / l of purified water per 24 h. sodium hypochlorite and / or chlorine are continuously fed in second place in the circulation system so that the actual active chlorine content in the water is 0.2 to 0.3 mg / l of purified water, and the coagulation of impurities is continuously fed. Preferably, the dilute hydrogen peroxide solution and the coagulant of impurities are fed to the circulation system upstream of the filtering site, and sodium hypochlorite and / 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 consisting of a 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. filter and from it another piping, 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 the hydrogen peroxide solution and the inlet of the dirt coagulant, 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

The conduit 4 leads to the pump 5, to which the conduit 6 for the drainage of water from the bottom of the pool basin 1 is simultaneously supplied.

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

The water that flows from the bathtub 1 through the upper drainage trough 2 flows through gravity into the accumulation well 3. From there it is sucked in by the pump 5 together with the water drawn from the bottom of the bathtub 1 through line 6 and pumped to the filter 8. the pump 5 and the filter 8 continuously feed the hydrogen peroxide solution, 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 free of impurities introduced by bathers.

Example 2

Method of water treatment

O Pool tub with dimensions of 20 x 11 x 1.2 m and capacity of 264 m, another 30 m ^{3 of} water is in the accumulation well 3. and with water in the filter, o

8th and in the circulation pipe it is a total of about 300 m of water.

The consumption of 30% by weight of hydrogen peroxide is 3 kg per 24 hours, ie.

mg / ml, corresponding to a water load of about 500 visitors per day and a water temperature of about 32 ° C. The hydrogen peroxide is diluted 1: 100 and continuously fed into the circulation system at the point between the pump 5 and the filter 8. Aluminum sulphate is also added to the space between the pump 5 and the filter 8 as an impurity coagulant in an amount 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 tub 1, is about 8 kg per day, ie about

26.6 mg / l of water, maintaining the actual active chlorine content in the water in the range of 0.2 to 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 at birth due to the decomposition of hydrogen peroxide and chlorine, 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 pool.

-3GB 281460 B6

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. C. (Rehabilitation Pool in the Spa), utilizing the procedure and engagement of the invention allowed the continuous disposal of faecal colli bacteria. Enterococci, psychrophilic and mesophilic microorganisms are kept at very low levels. Water analyzes carried out by a microbiological laboratory have shown satisfactory results over the long term.

PATENT CLAIMS

Claims (1)

1. in pools and water reservoirs with a controlled action consisting of a hypochlorite and / or chlorine solution and a coagulant of impurities, characterized in that at one point in the circulation The method of water treatment by the circulating system, the soda system is continuously fed with the resulting consumption in the range of 8 to 24 h, and at the same time continuously fed the actual content of purified tot to the second. water, instead of sodium hypochlorite in water was in and further continuously a hydrogen peroxide solution of 15 mg / l of purified water under a circulating system is and / or chlorine so that a coagulant of impurities is fed to a range of 0.2 to 0.3 mg / l. The method of claim 1, wherein 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 pool inflow. Connection of a water treatment circulation system according to claims 1 and 2, consisting of a pool tub (1) with an upper drain (2) connected to an accumulation well (3) from which the pipe (4) leads to the pump (5) where it is at the same time a pipe (6) for draining water from the bottom of the pool tub (1), (5) connects the pipe (7) to the filter (8) and from the heater (12) through the pipe (11) back to the pool. (7) and the filter (8) terminates inlet (9) of hydrogen peroxide solution and inlet (10) of impurities coagulant, and inlet (13) downstream of the filter is inlet (13) of sodium hypochlorite and / or chlorine. whereby a pump (5), possibly over the pump (5),