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What should you test for fresh water?

By.Johns 2024-08-06 04:27:01 Share on facebook Share on Google Share on Instagram Share on Pinterest Share on Twitter Share on Tumblr Share on WhatsApp Share on Telegram Share on Reddit Visit our Instagram

Introduction What should you test for fresh water? 1. Coal-fired boilers such as vertical water tube boilers, vertical fire tube boilers, horizontal internal combustion boilers, etc. Test items: suspended solids, total hardness, total alkalinity, pH (25

What should you test for fresh water?

1. Vertical water tube boilers, vertical fire tube boilers, horizontal internal combustion boilers and other coal-fired boilers

Test items: suspended solids, total hardness, total alkalinity, pH (25° C), Dissolved solids, relative alkalinity (free NaOH/dissolved solids)

II. Hot water boiler

Project

Hot water temperature ≤95℃, use chemical treatment in the pot >95℃, use external chemical treatment

< p> Make-up water circulating water Feed water circulating water

Suspended solids, mg/L ≤20 ≤5

Total hardness, mmol/L ≤3 ≤ 0.35

pH (25 ℃) ＞ 7 10～12 >7 8.5～10

Dissolved oxygen, mg/L ≤0.1 ≤0.1

Three. Water tube boilers, water and fire tube combination boilers and other oil and gas boilers

Test items: working pressure, suspended solids, total hardness, total alkalinity [H+ ], PH (25℃), oil content, oxygen dissous

See: National Water Quality Standard of the People's Republic of China on Industrial Boiler Water Quality GBl576-2001

Fresh water does not is just a name, indicating that the content of magnesium ions in water is low, not a standard.

Is your fresh water used to power the boiler? Of course, testing standards also depend on your water quality requirements! Different types of boilers have different makeup water needs. You just need to find the make-up water standard corresponding to the boiler type and carry out a project inspection according to the requirements of the standard to see if it meets the requirements.

There are different detection methods for different indicators, and each has its own instrumentation. For example: TSS of suspended solids can be measured with a turbidimeter, and pH can be measured with a pH meter...

The detectionection of various indicators can be measured by online instruments or local instruments installed on the pipeline. Of course, if you take water samples and measure them with a portable meter, this is not a problem.

In addition, two commonly used softening methods include ion exchange resin treatment and reverse osmosis treatment. If your softened water is treated by reverse osmosis, then you can judge whether it is qualified based on the conductivity of the effluent water.

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