An increase in temperature results in an increase in electrical conductivity. For boiler water, the conductivity increases at the rate of approximately 2% (of the value at 25°C) for every 1°C increase in temperature. This can be written as: Example 3.12.3. A boiler water sample has an unneutralised conductivity of 5 000 μS/cm at 25°C.
Boiler feed water quality is limited owing to problems of (1) scaling, (2) corrosion, and (3) foaming. In order to avoid these problems, the quality guidelines shown in Table IV have been adopted. Data in Table IV show a major difference between cooling water and boiler feed water quality constraints, in that boiler feed water has a strong relationship between water quality and the pressure of
Boiler Water Conductivity is the measurement of the dissolve solids, dissolved gases, and suspended solids within the boiler water. Conductivity is used to monitor the boiler cycles of concentration. This is the most important measurement when performing boiler water testing.
When you’re looking to measure the conductivity of your boiler water, it’s important that you keep the conductivity of the water at a certain level. If you want to prevent corrosion in your boiler, the water should have a conductivity reading that’s below 3,000 PPM, which equates to 6,000 µS/cm.
File Size: 305KB
Jun 24, 2020· Troubleshooting Boiler Conductivity Sensors Posted on: 02 Jun 2020 June 24, 2020 Written by: Lloyd Brown Comments: 0 The main cause of boiler sensor failure is steam exposure.
controlled by measuring the conductivity of the boiler feedwater. Conductivity is a viable indicator of the overall total dissolved solid concentrations. Typically, blowdown rates range from 4 – 8 percent of boiler feedwater flow rate, but can be as high as 20 percent with extremely poor quality feedwater. A commonly used ratio for the amount of boiler blowdown required is computed as follows:
Boiler drum water before cation conductivity is maintained between 10 to 30 μS/cm Boiler drum water after cation conductivity is maintained between 5 to15 μS/cm Extraction pump discharge conductivity after cation columns is maintained between 0.1 to0.3 μS/cm with an alarm value of 0.5 μS/cm
Below are key points to help ensure proper operation when installing a boiler conductivity electrode. Make sure the water level in the boiler is at least 4-6 inches above the surface blowdown line. Maintain the manufacturer's recommended pipe ID with no flow restrictions from the shut off valve to the electrode.
ZOZEN is one of the best modern boiler manufacturers in China. Our products have been sold to more than 100 countries and regions and set up offices in many countries to ensure that they serve customers at the first time.
Addr: No. 76, Xin Da Road, Zhou tie Town, Yixing, Wuxi, China