Water Treatment

BLOWDOWN–Blowdown, or bleed-off, is the continuous removal of a portion of the water from the circulating system. Blowdown is used to prevent the dissolved solids from concentrating to the point where they will form scale. The amount of blowdown required depends upon the cool- ing range (the difference between the hot and cold water temperatures) and the composition of the make-up water (water added to the system to compensate for losses by blowdown, evaporation and drift). The follow- ing table shows the amount of blowdown required to maintain different concentrations with various cooling ranges:

BLOWDOWN–% OF CIRCULATING RATE

Cooling Range

 

 

Number of Concentrations

 

 

 

 

 

 

 

 

 

1.5X

2.0X

2.5X

3.0X

4.0X

5.0X

6.0X

 

 

 

 

 

 

 

 

 

5° F (2.78° C)

.78

.38

.25

.18

.11

.08

.06

 

 

 

 

 

 

 

 

10° F (5.56° C)

1.58

.78

.51

.38

.25

.18

.14

 

 

 

 

 

 

 

 

15° F (8.33° C)

2.38

1.18

.78

.58

.38

.28

.22

 

 

 

 

 

 

 

 

20° F (11.11° C)

3.18

1.58

1.05

.78

.51

.38

.30

 

 

 

 

 

 

 

 

25° F (13.89° C)

3.98

1.98

1.32

.98

.64

.48

.38

 

 

 

 

 

 

 

 

Multipliers are based on drift of 0.02% of the circulating water rate.

EXAMPLE: 7000 GPM circulating rate, 15° cooling range. To maintain 4 concentrations, the required blowdown is .38% or .0038 times 7000 GPM which is 26.6 GPM.

If tower is operated at 4 concentrations, circulating water will contain four times as much dissolved solid as the make-up water, providing none of the solids form scale or are otherwise removed from the system.

CHEMICAL TREATMENT–In some cases chemical treatment of the circu- lating water is not required if adequate blowdown is maintained. In most cases, however, chemical treatment is required to prevent scale formation and corrosion. Sulfuric acid or one of the polyphosphates is most gener- ally used to control calcium carbonate scale. Various proprietary materi- als containing chromates, phosphates or other compounds are available for corrosion control. When water treatment chemicals are required, the services of reliable water treating companies should be obtained.

Slime, a gelatinous organic growth, and algae, a green moss, may grow in the cooling tower or heat exchangers. Their presence can interfere with cooling efficiencies. Proprietary compounds are available from water treating companies for the control of slime and/or algae; however,

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SPX Cooling Technologies F400 user manual Water Treatment, BLOWDOWN-% of Circulating Rate
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F400 specifications

The SPX Cooling Technologies F400 is an advanced cooling tower renowned for its robust design, efficiency, and versatility in industrial applications. Engineered with cutting-edge technologies, the F400 addresses the demanding thermal management needs of various sectors, including power generation, oil and gas, and manufacturing.

One of the standout features of the F400 is its modular design, allowing for seamless scalability. This design enables businesses to adapt their cooling solutions to fluctuating demand without compromising on performance. The ability to integrate multiple units into a singular system provides flexibility in addressing specific cooling needs while maintaining operational efficiency.

The F400 employs patented air and water flow technologies that enhance its heat transfer capabilities. The combination of optimized fan design and advanced drift eliminators maximizes air circulation while minimizing water loss, making it an environmentally friendly choice. The use of high-efficiency fans contributes to lower energy consumption, thus reducing operational costs and supporting sustainability initiatives.

Another key characteristic of the F400 is its durable construction. Built with corrosion-resistant materials and components, it is designed to withstand harsh environmental conditions, ensuring longevity and reliability. The tower's modular fill design enhances thermal performance while simplifying maintenance, as individual components can be accessed easily for inspection and cleaning.

The F400 is equipped with advanced monitoring and control systems that enable real-time performance assessments. These systems provide operators with valuable insights into operational efficiency, enabling proactive maintenance and troubleshooting, further enhancing productivity while reducing downtime.

Additionally, the F400’s quiet operation is a significant benefit for installations in urban or noise-sensitive areas. The sound suppression features ensure that the cooling tower blends seamlessly into its surroundings without causing disturbances.

Overall, the SPX Cooling Technologies F400 represents a significant leap forward in cooling tower technology, combining efficiency, adaptability, and durability. Its features make it a leading choice for industries that require dependable cooling solutions, underscoring SPX Cooling Technologies' commitment to innovation and excellence in thermal management.
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