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Monomers having carboxylic acid functional groups (polycarboxylates) Act as dispersants and weak sequestrants. o Maintain solubility of Ca, Fe, and Mg. Limited to <900 psig and 50 COC Subject to challenges of thermal degradation Can be corrosive if overfed Produce very clean heat transfer surfaces. o No precipitate is formed, blowdown can often ...
General. 2.1 State and briefly explain two major objectives of chemical control of the Condensate, Feedwater and Boiler System. 2.2 (a) Name two types of sludge and scale deposit-forming Substances and state their sources. (b) State three adverse effects of sludge and scale.
The basic construction material of condensate systems are iron and copper. These materials must not, therefore, be subjected to corrosion. The majority of corrosion products that are deposited in the boiler originate in the condensing system. High levels of iron oxide are formed in the condensate system. The following are the major corrosion ...
This document applies to industrial and commercial steam and hot water boiler plant, including steam generators, operating at a working pressure of between 0.5 and 32bar gauge (except where stated) and a working temperature between 110°C and 239°C.
This process can be carried out by an automatic system which uses either a probe inside the boiler, or a small sensor chamber containing a sample of boiler water, to measure the TDS level in the boiler.
Condensate: The water returning from the steam user(s). Feedwater: The water entering the boiler feed heating system, which will normally be a blend of treated water and condensate. Boiler water: The contents of the boiler. Blowdown: The water blown down from the boiler in order to maintain its total dissolved level below the specified limit.
Introduction. Boiler is a vessel wherein water is heated to convert into steam, with the application of heat of a burning fuel and/or the hot exhaust gas from some process. The heat potential available in steam is one of the well-known sources of energy to do mechanical work in any steam engine.
