Water quality requirements for low-pressure boiler water-Yuanlai Water Treatment

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Water quality requirements for low-pressure boiler water

Released Date: Aug 25,2015 Article Source: Yuanlai Water Treatment

Boilers are classified by the steam pressure they produce into low-pressure boilers (p≤205MPa, T≤400℃), medium-pressure boilers (2.5MPa < p≤6MPa, 400℃ < T≤450℃), and high-pressure boilers (6MPa < p≤14MPa, 460℃ < T≤). (540℃), ultra-high pressure boilers (14MPa < p≤17MPa, 540℃ < T≤570℃), subcritical pressure boilers (17MPa < p≤18MPa, 540℃ < T≤ At 570℃, supercritical pressure boilers (24MPa, 538℃), and even ultra-supercritical pressure boilers (30MPa, 566℃). The water quality of low-pressure boilers should comply with GB1576-2001 "Industry

Boilers are classified into low-pressure boilers based on the steam pressure they produce.p≤205MPa,T≤400℃Medium-pressure boiler2.5MPa＜p≤6MPa,400℃＜T≤450℃"High-pressure boiler6MPa＜p≤14MPa,460℃＜T≤540℃"Ultra-high pressure boiler14MPa＜p≤17MPa,540℃＜T≤570℃Subcritical pressure boiler17MPa＜p≤18MPa,540℃＜T≤570℃Supercritical pressure boiler24MPa,538℃Ultra-supercritical pressure boiler30MPa,566℃"

The water quality of the low-pressure boiler should comply withGB1576-2001"Water Quality Standard for Industrial Boilers", this standard is applicable to fixed steam boilers and steam-water dual-purpose boilers, fixed pressurized hot water boilers and atmospheric hot water boilers. The feed water of steam boilers and steam-water dual-purpose boilers is generally treated by external chemical water treatment, and the water quality should comply with the provisions of the following table:

For the rated evaporation capacity≤2t/hAnd the rated steam pressure≤1.0MPaFor steam boilers and steam-water dual-purpose boilers, in-boiler chemical treatment can also be adopted. However, the scaling, corrosion and water quality of the boilers should be strictly supervised. The water quality should comply with the following table.

For hot water boilers and atmospheric hot water boilers, either in-boiler chemical treatment or out-of-boiler chemical treatment can be adopted. The water quality indicators should comply with the provisions of the following table:

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