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What are the advantages and disadvantages of the three water circulation methods in swimming pools? How to choose? 2023-05-15 09:41:58

What are the advantages and disadvantages of the three water circulation methods in swimming pools? How to choose?

 

Before choosing swimming pool equipment, you need to determine the water circulation method. The swimming pool water circulation method is the way in which the swimming pool water and the swimming pool return water continuously flow in the pool. In layman's terms, it is necessary to solve the position or part of the swimming pool to take water (ie return water) and send the purified water from the swimming pool to the swimming pool, so as to effectively remove the water floating on the swimming pool water surface. Dirty surface water can minimize the existence of sediment pollution at the bottom of the pool. This is the main principle for choosing a swimming pool water circulation method.


downstream


The downstream water circulation method means that all the circulating water of the swimming pool is sent into the pool through the water supply port set at the end of the pool or below the water surface of the side wall, and then retrieved from the return water port at the bottom of the pool, and then sent back to the pool after water treatment. The water flow organization used.


advantage:


1. The requirements for the civil structure are lower, and the cost is lower than that of counter-flow and mixed-flow.

 

2. The pipeline layout is simple, the quantity is small, and there is no need to invest in redundant equipment such as equalizing water tanks. The management and maintenance are convenient and the investment is relatively low.

 

3. The computer room occupies a small area, and the elevation is required to be 1m lower than the water surface of the swimming pool.

 

Shortcoming:

 

1. The pool water in the lower part of the water inlet cannot be effectively circulated. The water distribution is not as uniform as that of the counter-flow type, and it is easy to produce dead water areas, resulting in uneven water quality in the pool.

 

2. All the overflow water in the overflow tank is discharged outside, which wastes more water.

 

3. The negative pressure of water absorption at the bottom of the pool is relatively dangerous, and it is easy to cause human body or hair to be absorbed by the water return port and cause injury.

 

Counterflow


The countercurrent water circulation method means that all the circulating water in the swimming pool is sent into the swimming pool through the water supply port or the water supply tank at the bottom of the pool, and then is retrieved by the overflow tank outside the pool wall, and then sent back to the pool after water treatment to continue. The water flow organization used.

 

Advantage:

 

1. The evenly arranged water supply ports at the bottom of the pool can meet the uniform water flow in the pool and prevent eddy currents, short flows and dead water areas;

 

2. Dirty impurities on the surface of the pool water can be collected through the overflow tank and then enter the water treatment system, which can effectively purify the water and suspended substances on the surface of the pool water. There are more water outlets and less sediment at the bottom of the pool.

 

3. Ensure that the water quality (cleanliness, disinfection margin, PH value and water temperature, etc.) in different water layers and different parts of the pool is uniform;

 

shortcoming:

 

1. The construction cost is higher.

 

2. It is necessary to configure a balanced water tank. The computer room occupies a large area. The height of the computer room is required to be about 3m lower than the water surface of the swimming pool to ensure overflow and return water, and the investment is high.

 

3. The construction of water distribution at the bottom of the pool is more difficult. There are more pipes than downstream and the overflow pipe diameter is required to be larger. Construction, installation and maintenance are more difficult.

 

4. There is a lot of noise in the overflow tank.

 

Mixed flow

 

The mixed-flow water circulation method refers to all the circulating water in the swimming pool. 75% to 80% of the water is retrieved through the overflow return port on the outside of the pool wall; the other 20% to 25% of the water is retrieved from the return port at the bottom of the pool. After the two parts of the circulating water are combined for the water treatment system, they are sent into the swimming pool through the water supply port at the bottom of the swimming pool to continue to use the water flow organization.

 

Advantage:

 

It not only has the advantages of the counter-flow pool water circulation method, but also has the advantage of the down-flow pool bottom return water that can rely on the water flow to wash away and take away the deposited dirt at the bottom of the pool. Although there are few examples of this method used in our country, it is known that the effect is satisfactory.

 

Shortcoming:

 

1. Higher construction costs. The construction of the computer room is basically the same as that of the reverse flow. The computer room occupies a large area and requires high investment.

 

2. The actual flow distribution of the pool bottom and overflow return water is difficult to control reasonably.

 

3. There is a lot of noise in the overflow tank.

 

4. The pipeline construction is similar to the counter-flow type. The flow is more than that of the downstream type and the overflow pipe diameter is required to be larger. The construction is more complicated, and there is one more return pipe than the counter-flow type that needs to be led to the machine room.

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