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INDUSTRIAL PURE WATER APPLICATION

Boiler Feedwater Treatment Solutions

BOILER FEED WATER TREATMENT-pure water use in industrial
The necessity of pretreatment of boiler feed water 
Proper treatment of boiler feed water is an important part of operating and maintaining a boiler system. As steam is produced, dissolved solids become concentrated and form deposits inside the boiler. This leads to poor heat transfer and reduces the efficiency of the boiler. Dissolved gasses such as oxygen and carbon dioxide will react with the metals in the boiler system and lead to boiler corrosion. In order to protect the boiler from these contaminants, they should be controlled or removed, trough external or internal treatment
The necessity of Boiler feed water purification
Boiler feed water, specifically for steam generation requires high purity water, different depending on regions and scales. The feed water quality requirement varies depending on the manufacturer/generator, as well as the boiler model. Poor water quality or system design results in boiler life span shortening. The design of the water treatment system is a function of the water quality that varies dramatically depending on the water source and region.


Boiler Feed Water Purification Process:
KELOPURE is very experienced in designing boiler feed water system, completing a lot of cases in China. The mature process for small to large scale boiler is RO+MB or RO+EDI, depending on investment.

The main contaminants to remove are hardness, iron, silica, sodium and chlorides. The basic pretreatment process removes the suspended matter and particles before reverses osmosis and finally deionized in mixed bed or EDI device. RO pre-treatment commonly consists of coagulation, flocculation, clarification, sand filtration, ultrafiltration, etc. Essentially 100% of the suspended particles must be removed in the pre-treatment. RO removes approximately 98% of TDS in raw water.



The diagram of BOILER FEED WATER TREATMENT

To the water running trough via boiler 


BOILER FEED WATER TREATMENT in whole power boiler system



BOILER FEED WATER TREATMENT
Project name: Hebei Jiheng Chemical Co., Ltd   
service time:March,2006
Process:IX-2stage RO 
Output 20m3/h qualified boiler feed water 
Conductivity≤2μs/cm
PLC control panel


Workshop-RO plant 


ION EXCHANGE


 Mixed bed or EDI is used at the last step to remove the residual ions, producing ultrapure water for feeding boiler. Resistivity of product water is usually over 10MΩ•cm. the comparison between mixed bed and EDI is listed below.