RU2424200C2 - System for treating and disinfecting water in swimming pools - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to water treatment in circulating water supply systems and is meant for treating and disinfecting water in swimming pools. The system comprises a pool deck with a hydraulic circulation loop. The circulation loop comprises a primary filter 9, a circulation pump 4, clarification 5 and sorption filters 10, an ozonation apparatus 6 with a unit for feeding ozone 7 into the water, a UV radiation apparatus 8, an apparatus for supplying a chlorine-containing reagent 13 and a reagent for correcting pH of the water 14, a water heater 15, a control unit 16 with sensors for controlling redox potential 17 and pH of the water 19. The unit for feeding water 2 into the pool deck is in form of nozzles 20 for supplying water, uniformly arranged at the bottom of the pool deck, and the water outlet unit 3 is in form of an overflow edge 21 with a tray 22, lying along the perimetre of the pool deck.

EFFECT: high efficiency of treatment and disinfection of water and ensuring quality of water which is safe for human health in swimming pools.

2 cl, 1 dwg, 1 tbl

Description

The invention relates to the field of water purification in circulating water supply systems and is intended for the purification and disinfection of water in swimming pools.

Sanitary and epidemiological requirements for the design, construction, reconstruction and operation of swimming pools are established by SanPiN 2.1.2.1188-03 (Swimming pools. Hygienic requirements for the design, operation and quality of water. Quality control). In accordance with the requirements of the specified SanPiN, to ensure the quality of the water in the pool bathtub that is safe for human health, swimming pools should be equipped with systems that provide water exchange in bathtubs with a frequency of (3 ÷ 4) per day, depending on the purpose of the pool.

At present, the most widespread are recirculation-type pools, in which water exchange is provided by circulating water in a closed circuit, in which it is cleaned and disinfected before being fed to the pool bath. In pools of this type, using highly effective systems for cleaning and disinfecting water, water quality that is safe for humans is ensured, while the consumption of fresh water is significantly reduced and operating costs are reduced. Thus, the most important element of a circulation-type swimming pool is a system for cleaning and disinfecting circulating water circulating in a closed pool circuit.

A known system for cleaning and disinfecting water in a swimming pool of a recirculation type, comprising a pool bath with a recirculation loop, in which, as the water moves, a recirculation pump, a water chlorination unit, a heater and a filter are installed [1. PCT Patent WO 95/33112, CL E04H 4/00, A63B 69/12, 12/07/1995].

A disadvantage of the known system for cleaning and disinfecting water in a swimming pool is its low cleaning efficiency, due to the fact that the water taken from the pool is immediately, without preliminary treatment, subjected to chlorination. In this case, when chlorine acts on organic compounds contained in water, harmful organochlorine derivatives are formed (for example, chloramines, chloroform, etc.), which are not removed from the purified water by further filtration. In addition, the system lacks regulation of the supply of chlorine-containing reagents to the water. In this case, when the amount of pollution in the pool water changes, the treated water will either exceed the residual chlorine or its deficiency, which as a result has a negative effect on human health.

A known system for cleaning and disinfecting water in a swimming pool, comprising a pool bath with a recirculation loop, in which a recirculation pump, a filter, a heater, and a water chlorination unit are installed. In this case, the recirculation circuit is equipped with an additional circuit containing a sequentially installed sorption filter and an ozonizer installation (Japanese Patent JP No. 6057357, CL B4, MKI C02F 1/78 of 08/03/94).

The disadvantage of this water purification system is its low efficiency, due to the fact that water is supplied directly to the sorption filter from the pool bath, since there is no coarse filter for suspended solids at the water outlet of the pool, as a result of which suspended solids present in the water and delayed by sorption loading, clog the pores of the latter, which dramatically reduces its sorption capacity. As a result, the filter service life is significantly reduced. In addition, only part of the recirculated water stream is subjected to ozone treatment. In this case, and in the absence of regulation of the ozone supply, when the water pollution in the pool changes, conditions can be created under which pollution will leak through the filter installed in the main recirculation loop. Upon further processing of such water with chlorine-containing reagents, harmful organochlorine derivatives are formed in it, which will enter the pool bath. It should also be noted that even the use of ozonation and sorption filtering does not provide reliable water purification from all chlorine derivatives, as a result of which the specified water purification system does not guarantee protection of the pool bath from harmful organochlorine contaminants (such as, for example, chloramines, chloroform).

Closest to the proposed technical solution in terms of technical nature and the achieved result, adopted as a prototype, is a system for cleaning and disinfecting water in a swimming pool, including a pool bowl and a hydraulic circulation circuit containing units for introducing water into and out of the pool bowl, a circulation pump water, an ozonation unit with a unit for introducing ozone into the circulating water and a UV irradiation unit (RF Patent No. 2217388, class C02F 1/78 of 04/22/2002) (prototype).

A drawback of this water purification and disinfection system is that the ozonation and UV irradiation units are installed in parallel, as a result of which the water circulating in the hydraulic circuit is treated separately by ozone and UV irradiation. In this case, it is not possible to obtain the effect of the combined effects of ozone and UV radiation on pollution in purified water. As a result, contaminants may remain in the purified water supplied to the pool bowl. In addition, this system does not provide a long-term, at least 6 hours, disinfecting effect in the water located in the pool bowl, since disinfection is carried out only by ozone and UV radiation (the maximum prolonged action in this case is possible no more than one hour). Also, in the system adopted as a prototype, the quality of the treated water is not controlled and the ozone supply is not ensured when the amount of pollution in the water changes. It should also be noted as a lack of a coarse filter in front of the pump, which can lead to failure if hair or other such contaminants get into it.

The objective of the present invention is to provide a system for cleaning and disinfecting water in a swimming pool, ensuring its quality safe for humans.

The task is achieved in that it is additionally equipped with a coarse filter, a sorption filter, chlorine-containing reagent and reagent injection units for adjusting the pH of the water with appropriate input units, a water heater circulating in the pool, and a control unit electrically connected to two oxidation-control sensors recovery potential and a pH control sensor, and UV-irradiation and water ozonation installations are placed between the clarification and sorption filters so that the entrance to of the ozone injection port is connected to the output pipe of the lighting filter, and the output to the input pipe of the UV irradiation unit, the output pipe of which is connected to the input pipe of the sorption filter, a coarse filter is placed between the unit for draining water from the pool bowl and the suction pipe of the water circulation pump, discharge the nozzle of which is connected to the inlet of the clarification filter, the outlet of the sorption filter is in communication with the input of the chlorine-containing reagent introduction unit, the outlet of which is connected to the inlet a water heater nozzle, the outlet nozzle of which is connected to the input of the input unit of the reagent for adjusting the pH of the water, while one of the sensors for monitoring the redox potential is installed between the outlet nozzle of the heater and the input of the unit of the input of the reagent for adjusting the pH of the water, the second one is in the unit for draining the water from the pool, and a sensor for controlling the pH of the water is installed in the unit for introducing water into the pool, and the control unit is additionally electrically connected to the ozonation unit and the units for introducing chlorine-containing reagents and reagent for adjustments to the pH of the water.

The implementation of the node for introducing water into the pool bowl in the form of water nozzles located evenly along the bottom of the bowl, and the water drainage unit in the form of an overflow edge with a tray located around the perimeter of the bowl, provides a uniform flow of water through the entire volume of the pool bowl, which eliminates the formation of stagnant zones and creates safe sanitary conditions for the operation of the pool.

A comparative analysis of the proposed technical solution with the technical solution of the prototype indicates the presence of new nodes and connections that can improve the efficiency of water purification and disinfection in the swimming pool and ensure safe sanitary and hygienic conditions for its operation.

Thus, the claimed technical solution meets the criteria of the invention of "novelty."

The drawing shows a process diagram of a system for cleaning and disinfecting water in a swimming pool.

The system for cleaning and disinfecting water in a swimming pool includes a bowl 1 of the pool and a hydraulic circuit. The hydraulic circuit contains units 2 and 3 for introducing water into the bowl 1 of the pool, a pump 4 for circulating water, a clarification filter 5, an ozonation unit 6 with a unit 7 for introducing ozone into the circulating water, and an UV irradiation unit 8. The hydraulic circuit also includes a coarse filter 9, a sorption filter 10, installation 11 and 12 of the introduction of chlorine-containing reagent and reagent to adjust the pH of the circulating water with the nodes 13 and 14 of the input of the corresponding reagents. To maintain the required temperature in the bowl 1 of the pool, the hydraulic circuit is equipped with a heater 15 of water circulating in the circuit. To monitor and control the water purification processes, the system is equipped with a control unit 16 with two sensors 17 and 18 for monitoring the redox potential, installed between the heater 15 and the reagent inlet unit 14 to adjust the pH of the water and at the outlet from the pool 1, respectively, and a control sensor 19 pH of the water in the circulation circuit installed at the entrance to the pool bowl.

The node 2 for entering water into the bowl 1 of the pool is made in the form of nozzles 20, evenly spaced along the bottom of the bowl 1 of the pool.

The node 3 drainage of water from the pool is made in the form of an overflow edge 21 and a tray 22 located along the perimeter of the bowl 1 of the pool.

The system for cleaning and disinfecting water in a swimming pool works as follows.

From the tray 22 of the unit 3 for draining water from the bowl 1 of the pool, water through the coarse filter 9, in which large suspended particles (such as hair) are retained, enters the suction pipe of pump 4. By pump 4, water is supplied under pressure to the clarification filter 5, in which fine suspended organic and inorganic pollution. The water clarified in the filter 5 enters the ozone input unit 7, into which ozone enters from the ozonizer 6. Water saturated with ozone then enters the UV irradiation unit 8, in which it is treated with the simultaneous exposure to ozone and UV irradiation. With combined ozonation and UV irradiation, the process of radical formation is intensified and pollutants are activated. As a result of such water treatment, even the most persistent organochlorine and organic compounds contained in it are oxidized, which are not susceptible to oxidation separately by ozone or UV irradiation and which are poorly recovered by sorption filter loads. The water treated with ozone and UV irradiation enters the sorption filter 10. Since the contaminants in such treated water are light forms of organic contaminants, they are almost completely delayed at the filter load. In the presence of residual ozone in the water entering the sorption filter 10, the delayed contamination is additionally oxidized by it as a result of the catalytic effect of the sorption charge. As a result, after leaving the sorption filter 10, the circulating water is almost completely cleaned of organic impurities, therefore, with its further chlorination, there is no danger of the appearance of harmful organochlorine compounds hazardous to human health. Therefore, the introduction after the sorption filter 10 into the water using the installation 11 of a chlorine-containing reagent does not cause deterioration of the quality of the water in the pool. In addition, this reagent is introduced in small quantities necessary to maintain the disinfecting effect in the bowl 1 of the pool. During the operation of the water purification and disinfection system in the swimming pool, the oxidation-reduction potential is monitored at the outlet of the pool 1 in the pool water drainage unit using the sensor 18, the control signal from which is supplied to the control unit 16, in which it is converted into a control the signal supplied to the ozonizer 6 and regulating the supply of the required amount of ozone to the water circulating in the circuit. The second redox potential monitoring sensor 17, installed after the heater 15, monitors the quality of the water supplied to the pool, a control signal from which it also enters the control unit 16 and, after being converted into the control unit, is supplied to the chlorine-containing reagent introduction unit 11 for water chlorination. Depending on the ORP value, the required amount of reagent for chlorination of water is supplied. If necessary, adjust the pH of the water supplied to the bowl 1 of the pool, according to the signal of the pH control sensor 1.9, the unit 12 for introducing the reagent is turned on to adjust the pH of the water and maintain it at the required level.

The purified and disinfected water is fed through the unit 2 of the water inlet into the bowl 1 of the pool and is evenly distributed over the pool volume by the supply nozzles 20.

The results of chemical analysis of water (see the data given in the table) taken from a pool bowl, performed during comparative tests of water treatment technologies in a swimming pool according to the prototype scheme (Option I) and according to the scheme of this technical solution (Option II), show that the proposed technical solution improves the efficiency of water treatment and ensures the quality of the water in the swimming pool, safe for people.

Swimming Pool Water Pollution Index The level of pollution in the basin, mg / l Normative data on SanPiN 2.1.2.1188-03, mg / l Option I Option II Chloroform: <0.1 - at the entrance to the pool 0.12 0.01 - in the middle of the pool 0.2 0.05 - at the exit from the pool 0.27 0,074

Claims (2)

1. A system for cleaning and disinfecting water in a swimming pool, including a pool bowl and a hydraulic circulation circuit, containing nodes for introducing water into and out of the pool, a water circulation pump, a clarification filter, an ozonation unit with an ozone unit for circulating water and a UV unit -exposure, characterized in that it is additionally equipped with a coarse filter, sorption filter, installations for introducing a chlorine-containing reagent and a reagent to adjust the pH of the water with the corresponding input nodes, n a water heater circulating in the hydraulic circuit and a control unit electrically connected to two sensors for monitoring the redox potential and a sensor for controlling the pH of the water, the UV irradiation and water ozonation units being placed between the clarification and sorption filters so that the input of the ozone input unit is connected with the outlet pipe of the clarification filter, and the outlet with the inlet of the UV irradiation unit, the outlet of which is connected to the inlet of the sorption filter, the filter is coarse a source is located between the unit for discharging water from the pool bowl and the suction pipe of the water circulation pump, the discharge pipe of which is connected to the inlet pipe of the clarification filter, the output pipe of the sorption filter is in communication with the input of the chlorine-containing reagent introduction unit, the output of which is connected to the input pipe of the water heater, the output pipe of which connected to the input of the input unit of the reagent adjusting the pH of the water, while one of the sensors monitoring the redox potential is installed between the output one heater pipe and the input of the reagent inlet unit adjust the pH of the water, the second in the unit for discharging water from the pool, and the water pH control sensor is installed in the unit for entering water into the pool, and the control unit is additionally electrically connected to the ozonation unit and the units for introducing chlorine-containing reagents and reagent to adjust the pH of the water. 2. The water purification and disinfection system according to claim 1, characterized in that the node for introducing water into the pool bowl is made in the form of water nozzles evenly spaced along the bottom of the bowl, and the water discharge unit is made in the form of an overflow edge with a tray located around the perimeter bowls of the pool.