Low Pressure Steam boilers Info Unilux
Dec 04, 2019 · Figure 1. Calcium carbonate scale on the internal surface of an extracted heat exchanger tube section. For decades, a typical primary treatment method for industrial boiler makeup was sodium zeolite softening. In this process, the water passes through beds of ion exchange resin, where the hardness ions calcium and magnesium are swapped for sodium.
Get PriceMay 02, 2000 · Similarly, if better dissolved solids control is required, another form of ion exchange may be employed. Demineralization is a method of choice for removal of nearly all dissolved solids for higher-pressure boilers that have tighter restrictions on boiler chemistry. Positively charged ions (cations) such as sodium, calcium, magnesium, and
Get PriceSodium carbonate can convert into sodium hydroxide through hydrolysis. The latter compound reacts with iron in the boiler, dissolving it and producing sodium ferrate. This product then undergoes hydrolysis again, converting back to sodium hydroxide, continuing the process.
Get PriceSodium carbonate treatment was used to precipitate calcium as calcium carbonate to prevent the formation of calcium sulfate. The driving force for the formation of calcium carbonate was the maintenance of a high concentration of carbonate ion in the boiler water. Even where this was accomplished, major scaling by calcium carbonate was common.
Get Pricecarbonate hardness is 14 ppm. If hard water is allowed to go to the DA, it can flash deposit in the DA and migrate to the shaft of the feed water pump causing the shaft and packing to fail. • Injection Quill – Always use stainless steel as sodium …
Get PriceDeaeration of make-up water and condensate return. Ion exchange; deionization, acid treatment of make-up water. Sodium salts are found in most waters. They are very soluble, and cannot be removed by chemical precipitation. Sulphates (SO 4) Hard scale if calcium is present. Deionization. Tolerance limits are about 100-300ppm as CaCO 3. Chlorides,
Get PriceIon exchange An ion exchanger is an insoluble material normally made in the form of resin beads of 0.5 to 1.0 mm diameter. The resin beads are usually employed in the form of a packed bed contained in a glass reinforced plastic pressure vessel. The resin beads are porous and hydrophilic - that is, they absorb water.
Get PriceIon Exchange Technologies Ion exchange equipment – the ion exchange process is an exchange of one ion for another, using a synthetic resin to perform the transfer of ions. These technologies are widely used for the removal of inorganic dissolved solid impurities from the feed water to steam-generating boilers or other process equipment to prevent
Get PriceIn high pressure boiler, sodium carbonate decomposes to give NaOH and CO 2 By using sodium phosphate instead of sodium carbonate for softening water. 2. By adding tannin or or lignin to the boiler water, since these block the 4 a Ion-exchanger process: 2 marks for . MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION
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