•SILICA -- coming thru the makeup water to the feedwater that may be used for attemperation can cause problems in the turbine area. Especially if colloidal silica is present in the makeup water. •Recommend maintaining close limits of allowable silica in the boiler water to keep sat steam silica < 20 ppb. Record all values daily
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Although a demineralizing plant existed for the boiler feed water make up, the ion exchange resins were not able to retain the colloidal silica. Also, the First Unit operation was held at 25% of its rated capacity; in trying to raise the output to 50%, the silica concentration in the boiler water went over the allowed limits, resulting in a
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Dec 31, 1988 · Although a demineralizing plant existed for the boiler feed water make up, the ion exchange resins were not able to retain the colloidal silica. Also, the First Unit operation was held at 25% of its rated capacity; in trying to raise the output to 50%, the silica concentration in the boiler water went over the allowed limits, resulting in a concentration of 1,500 ppb in the boiler …
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If colloidal silica is more, Boiler Water silica will increase even if CBD is open. IN BOILER WATER SO THAT ENTRY OF CHLORIDE IN STEAM IS RESTRICTED - DO NOT USE ATTEMPERATION SPRAY - OPERATE CBD TO CONTROL BOILER WATER SILICA AND CHLORIDE LEVEL. CONDENSER LEAK IDENTIFICATION Share on LinkedIn, opens a new window. LinkedIn.
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o Investigational works relating to plant problems relating to high silica in makeup and boiler water, colloidal/non-reactive silica in raw and makeup water, scale formation and corrosion in cooling water, blockage of generator cooling coils, life extension to ion exchange resins, low/high pH of D. M. water.
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Jun 08, 2005 · Even those lab results have poor resolution. The cutoff for detectability at one lab was 100 ppb colloidal silica. Obviously we could have been adding 99 ppb colloidal silica in our make-up water that the boiler was converting to reactive silica. So the lab results were not the definitive CSI: results we would have liked to have :).
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Colloidal silica slips through the demineralisation (DM) plant to get converted into reactive silica at high temperature and pressure leading to severe problems in boilers. When reverse osmosis (RO) plants are used in water treatment, colloidal silica and associated impurities can foul RO membranes leading to drop in productivity.
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• Analysis of industrial effluents treated water, Cooling Tower & Boiler water as well as other utility samples. • Preparation and standardization of analytical solutions. • Wet Analysis of Silica content in Colloidal Silica Sol. • Analysis of Ethyl Silicate.
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Some forms of silica, known as colloidal, or non-reactive, are not removed by a demineralizer. Hot, alkaline boiler water dissolves the colloidal material, forming simple silicates that are similar to those that enter the boiler in a soluble form. As such, they can form deposits on tube surfaces and volatilize into the steam. DEALKALIZATION
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Feb 14, 2020 · Silica removal is deployed for a variety of industrial applications, including treatment of raw water, cooling tower makeup water, boiler feed and blow down water. Silica can be present in the form of granules, colloids, or reactive ions, and selecting the appropriate silica removal technology depends on which physical forms of silica are
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If colloidal silica is more, Boiler Water silica will increase even if CBD is open. IN BOILER WATER SO THAT ENTRY OF CHLORIDE IN STEAM IS RESTRICTED - DO NOT USE ATTEMPERATION SPRAY - OPERATE CBD TO CONTROL BOILER WATER SILICA AND CHLORIDE LEVEL. CONDENSER LEAK IDENTIFICATION Share on LinkedIn, opens a new window. LinkedIn.
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• Analysis of industrial effluents treated water, Cooling Tower & Boiler water as well as other utility samples. • Preparation and standardization of analytical solutions. • Wet Analysis of Silica content in Colloidal Silica Sol. • Analysis of Ethyl Silicate.
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1. Cooling water treatment, Reverse Osmosis, STP: SWRO permeate corrosion problem solved, BWRO fouling problem and silica problem solved. 2. Boiler water chemistry. Reliability of units, & SWAS analytical system. Unit commissioning, PG test, BTL reduction and…
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1. Cooling water treatment, Reverse Osmosis, STP: SWRO permeate corrosion problem solved, BWRO fouling problem and silica problem solved. 2. Boiler water chemistry. Reliability of units, & SWAS analytical system. Unit commissioning, PG test, BTL reduction and…
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•SILICA -- coming thru the makeup water to the feedwater that may be used for attemperation can cause problems in the turbine area. Especially if colloidal silica is present in the makeup water. •Recommend maintaining close limits of allowable silica in the boiler water to keep sat steam silica < 20 ppb. Record all values daily
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Mar 16, 2004 · Silica removal is very expensive in terms of investment and operating costs. The risk of silica salt deposition in the boiler tubes becomes significant when the silica content in the feed water exceeds 100 mg/l (OTSG boiler supplier specifications). Deposition of silica increases local thermal resistance and can lead to tube failure.
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Colloidal Silica. Colloidal silica is much finer than granular silica. Because of their fineness, the particles stay dispersed in the boiler water without precipitating out, forming something called a colloid. These particles are harder to remove, especially if the water contains other suspended particles. Below are some of the best ways to
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Silica, in amounts ranging from less than 1 to over 100 ppm, is found in all natural water supplies.In rain hail and snow, silica content range from 1 to 2.8 ppm. In the analyses of various surface and ground waters, silica content range from 1 to 107 ppm.This refers to soluble silica content and not to the silica that may be present in the suspended matter.
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COLLOIDAL SILICA IN BOILER WATER COLLOIDAL SILICA IN BOILER WATER Gusto ni Allodia Novicio. Edukasyon Technological University of the Philippines Technological University of the Philippines -2015 - Kasalukuyan. Tingnan ang buong profile ni Allodia Tingnan ang mga pareho ninyong kilala
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By efficiently removing colloidal silica, the high-pressure boilers are protected from scale deposits, which maximises plant performance and prevents turbine failure. In one single process step, HFS 60 silica membranes are capable of removing 99.8% of colloidal silica.
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