Sports pool reconstruction

Contents

1. Source data. General provisions

2. Adopted norms

3. Private Pool Process Flow Diagram

3.1. Water filtration

3.2. Water heating

3.3. Chemical treatment of water

3.4. Makeup of overflow tank

Application

Application

Application

1. Source data. General provisions.

The design documentation is developed in accordance with the requirements of technological, sanitary, chemical, fire and other standards applicable in the territory of the Russian Federation, and ensures safe operation of the facility for life and health of people, subject to the measures provided for in the design documentation.

The documentation is developed on the basis of the following regulatory documents:

Construction Norms and Regulations 110195 "Instruction about an order of development, coordination, statement and structure of the project documentation ".

SanPiN 2.1.2.118803 "Hygienic requirements for the arrangement, operation and water quality of swimming pools."

SNiP 2.04.0185 * "Internal water supply and sewerage of buildings."

Reference manual for SNiP "Pool Design" was developed for SNiP 2.08.0289 "Public Buildings and Structures."

GOST 21.60179 "System of design documentation for construction" Water supply and sewerage. " Working drawings. "

Technical documentation for installed equipment.

2. Adopted norms

The initial filling time of the bath is not more than 24 hours during the period of minimum water consumption .

The bath is replenished with fresh water - 5% of the bath volume during the day.

Water temperature from the city water supply + 5С.

The water temperature in the bath is + 2428C.

Emptying the pool in no more than 24 hours.

3. Basic process diagram of the public pool.

The pool is designed for sports swimming. A pool bath with a rectangular shape with dimensions of 25.00 x 16.00 x 1.80 sound2.05 m; volume - 770.00 m3; surface area - 400.00 m2.

The total water exchange time is 6.8 hours.

Water treatment system equipment is located below the water level in the basement room.

Overflow scheme of water exchange is used in basin.

The adopted water treatment scheme allows performing the following operations:

Auto-watering.

Initial heating of water to preset temperature.

Filtration of heated water.

Chemical treatment of water.

Return purified, heated and disinfected water to the bath.

Flushing of filter with discharge of dirty water into sewage system.

Emptying bath and overflow vessels.

The initial filling of the pool is carried out with drinking quality water according to an independent branch when the filtering plant is turned off by the Customer with the jet rupture.

During filtration, the water supplied to the bath through the reverse current nozzles mounted in the bottom of the basin displaces the upper, most contaminated layer of water into the overflow tray.

From the overflow tray, water through the collecting headers enters the overflow (balance) tanks, from where it is supplied to the filters by the pump. After mechanical purification of water, it is heated and then disinfected. After passing through the filtration, heating and chemical treatment systems, water is returned to the bath through the supply nozzles.

The bath is emptied into the sewer via bottom drains using a filter pump.

The need to empty the bath is determined by the data of chemical and biological analyses and the conclusion of the SES bodies.

Emptying is carried out after water treatment with increased doses of disinfectant, sludge and subsequent dechlorination. In this case, water can be used for watering, cleaning the territory, etc.

As an additional function of the water exchange system, the possibility of connecting an underwater "vacuum cleaner" to clean the bottom and walls of the bath should be noted.

In addition to the water treatment system, the pool is equipped with a water illumination system.

Binding valves and pipelines of the systems are made of PVC, which has high strength, low weight and, in comparison with steel, greater resistance to salt deposition and destruction under the influence of aggressive media, lower hydraulic resistance. The use of PVC pipes and fittings with a smooth internal surface increases the throughput and service life of process pipelines several times.

Annex 1 to the present document shows the hydraulic schematic diagram of the basin equipment, annex 2 - the single-line diagram of the electrical equipment connection, annex 3 - the electrical equipment specification.

3.2. Water heating.

The water temperature in the basin is 2630 ° С.

The amount of heat required to heat the water poured into the bath and the parameters of the water heating device are determined taking into account the volume of the bath, the temperature of the water in the water supply in winter and the duration of filling. During operation, the main task of heating is to compensate for heat losses when replenishing the volume of fresh make-up water and losses resulting from its evaporation from the surface of the mirror, in communications and equipment of the recycled water supply system.

Four water-water heat exchangers are selected as water-heating device. They have a nominal thermal power of 120 kW each. This power is calculated for certain rates of primary (hot) and secondary (cold) flows through the heat exchanger, and at a temperature difference of 60 deg. C. Heat exchanger power varies depending on the water flow rates in the primary and secondary circuits. It also depends on their temperature difference.

Water from the heating network is supplied to the heat exchanger via the direct branch of the coolant, is discharged via the reverse. The circulation of closed circuit water from the network to the heat exchanger is provided by a circulation pump, the supply of hot water to the heat exchanger is controlled by an electromagnetic valve. Solenoid valve and circulation pump is controlled by thermostat installed after filter.

The control circuit of the circulation pump and the electromagnetic valve of the heat exchanger is assembled so that power is supplied to them at the start of the pump of the filter unit and is stopped when this pump is disconnected.

Technical specifications of "MAXIFLO" heat exchanger:

Material - acid-resistant stainless steel AISI 316L;

Maximum pressure: primary circuit - 10 atm., secondary circuit - 10 atm.;

Performance - 120 kW;

Head loss in primary circuit (coolant) - 0.7 m;

Coolant flow rate 150 l/min;

Pressure loss of heated water - 2.9 m;

Heated water flow 630 l/min;

The heat exchange area is 3.3 m2.

During the initial filling of the pool, in order to reduce the heating time of the water, it is possible to supply it from the hot water supply system with a temperature of no more than 35 ° С.

For detailed information on heat exchanger installation and operation rules, refer to its technical documentation.

In order to facilitate adjustment of the heat exchanger equipment and effective control over its operation during operation, the following instruments and valves shall be provided in the OM design:

Prefilter on straight pipe.

Thermometers on straight and return pipe

Membrane pressure gauge on straight and return pipe.

Coolant supply disconnection valves on the direct and reverse coolant pipe.

3.3. Chemical treatment of water.

The circulating water treatment and disinfection system is designed to maintain water quality in the swimming pool that meets the main indicators established by SanPiN 2.1.2.118803 "Hygienic requirements for the arrangement, operation and water quality of swimming pools."

Water disinfection with chlorine-containing preparations is carried out in such doses that after the complete oxidation of organic substances, excess chlorine, the so-called free chlorine, remains in the water. When chlorinating water in the cooling water supply system of the basin, the concentration of free chlorine should be 0.30.5mg/l. With a long recirculation of water, bacteria, microorganisms and even amoebas are "accustomed" to this concentration of free chlorine. The resulting stable forms can be destroyed by rechlorination of water.

Rechlorination - treatment of basin water (usually at night) with increased doses of chlorine (4-5 mg/l) - will lead to the destruction of chloro- resistant forms of bacteria, a decrease in the concentration of nitrogen-containing compounds and an increase in the content of HOCl.

In order to achieve these quality characteristics, the project provides for the following basin water treatment technology:

Dosed addition of coagulant to water before filtration to improve the quality of mechanical purification of water;

water filtration through a high-performance sand filter;

water disinfection with ultraviolet radiation;

automatic control of water temperature entering the pool bowl;

controlling the acidity level of the pH by dosed addition of reagent pHMinus to water;

decontamination of water by dosed addition of chlorine-containing reagent to water.

Bactericidal (ultraviolet) rays alter the internal structure of microorganisms and destroy all types of bacteria. Treatment of water with bactericidal rays is carried out much faster than with reagents. However, such disinfection has a significant drawback - water does not have bactericidal properties and is not able to eliminate the newly introduced bacterial contaminants. Bactericidal radiation as a method of disinfecting water for pools can be used only in combination with another method of disinfection with a "residual consequence."

Water disinfection with bactericidal rays is carried out using the bactericidal ultraviolet unit "UDV6A300H10150."

The use of physical and chemical methods of water disinfection in combination makes it possible to significantly reduce the consumption of chemical reagents, which in turn will affect the improvement of the physical and organoleptic properties of the pool water.

Detailed information on the rules for installation and operation of UV disinfectant station "UDV-6A300N-10-150" is contained in the technical documentation for it.

Reagent pHMinus is designed to control the level of acidity of water. The optimal level of acidity (pH = 7.0-7.4) increases the effectiveness of decontaminating reagents.

Chlorine-based reagents are used to disinfect water. Chlorine destroys bacteria, spores, viruses and destroys organic substances dissolved in water.

Determination of water quality and dosing of chemical reagents is carried out by automatic dosing station "BAYROL ANALIT," which includes water quality control sensors, control panel, dosing pumps. Water parameters are displayed on the control panel screens. By the signal of the processor, liquid chemical reagents supplied in canisters are supplied to the water by dosing pumps.

The addition of chemicals to water is carried out after its heating.

For detailed information on the installation and operation of the BAYROL ANALIT dosing station, refer to the technical documentation.

Sanitary treatment of the bath, including full drainage of water, mechanical cleaning and disinfection, is carried out in time agreed with the bodies of the State Sanitary and Epidemiological Supervision.

Bath disinfection can be carried out by specially trained pool personnel or by local disinfection stations, as well as by preventive disinfection departments of sanitary and epidemiological service institutions (under contracts). (SanPiN 2.1.2.118803, para. 3.9.3.)

In the absence of a production analytical laboratory in the basin, water quality control can be carried out on a contractual basis in laboratories accredited and certified in the system of the State Sanitary and Epidemiological Supervision.

During the pool operation, the room treatment, water extraction for sampling from the pool bowl and pipelines shall be carried out according to SanPiN 2.1.2.118803.

In accordance with the authorities of the State Sanitary and Epidemiological Supervision, in each particular case, the multiplicity of water samples and the list of indicators can be changed depending on the type (purpose) of the basin and its operating conditions.

Water sampling for analysis from the pool bath is carried out in at least 2 points in the small and deep parts of the pool bath at a depth of 2530 cm from the surface of the water mirror.

Water sampling for analysis from pipelines is performed in 4 points:

Incoming (tap) water.

Before and after filters.

After chemical treatment of water.

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