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Ion Exchange Softeners and Dealkalizers – Water Technology

Offer Details: Poor quality or off-spec regeneration chemicals. Verify that the chemical regenerants meet your specifications. Increased Pressure Drop Across the Bed. An ion exchange bed exerts a resistance to flow that is measured as a pressure decrease across the vessel. Some pressure drop is a normal condition, but excessive loss of head and reduced flow See more ...

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Scale and Fouling Control in Cooling Tower Systems – Water

Offer Details: Traditionally, sulfuric acid is used to adjust the carbonate and bicarbonate alkalinity to maintain the pH of the cooling water in the 6.5 to 7.5 range. This corresponds to a total alkalinity of less than 100 ppm. When used with bleed off control to keep the calcium concentration in the 300 to 400 ppm range, calcium carbonate scales do not form. See more ...

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Corrosion Control in Water Distribution Systems – Water

Offer Details: Corrosion of water distribution systems causes billions of dollars of damage every year. Damage caused by corrosion affects the reliability and useful life of residential and commercial buildings, industrial processes and high purity water systems; just to name a few. The by-products of corrosion, which are commonly described as an off-taste, odor, or appearance, adversely… See more ...

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Cooling Tower Calculations – Water Technology Report

Offer Details: For modern mechanical draft cooling towers with drift eliminators, the impact of windage on the overall bleed rate is minimal and often ignored in cooling tower calculations. Theoretically, if the controlled bleed is shut off, the maximum cycles of concentration achievable in a cooling tower is limited by the percent evaporation and percent windage See more ...

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cycles of concentration – Water Technology Report

Offer Details: cycles of concentration Cycles of concentration is defined as the ratio between the impurity levels in the recirculating water to the same impurity level in the makeup water. Generally, the chloride ratio, conductivity ratio, or magnesium ratio is taken as the indicator of cycles of concentration, since these impurities are relatively soluble See more ...

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Chemical Treatment Requirements for Condensate Systems

Offer Details: When incoming steam is shut off, pressure drops as the unit or system cools. Accumulated carbon dioxide dissolves into the residual condensate causing the pH to drop sharply and accelerating corrosion. Proper drainage from intermittently operated condensing units is vital. See more ...

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Reverse Osmosis – Water Technology Report

Offer Details: Reverse osmosis is a useful technology for producing high purity water for many industrial, commercial and residential applications. Proper design, operation and maintenance of the RO system is required to insure minimal problems with membrane fouling, shortened membrane life, and increased operating and maintenance costs. See more ...

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Polishing Reverse Osmosis Permeate – Water Technology Report

Offer Details: Reverse osmosis (RO) produces water of excellent purity for many applications including semiconductor manufacturing, pharmaceutical, medical, laboratory and power generation to name a few. The RO process removes over 99% of the dissolved solids from the feedwater. But this means that 1% or so remain, which is unacceptable for many applications. See more ...

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Microbiological Control in Cooling Water Systems – Water

Offer Details: Microbiological problems are a common occurrence in cooling water systems. These living organisms are present in the air, soil and water. Under the proper conditions, these microscopic plants and animals grow into large colonies that block water flow, impede heat transfer, destroy wood, induce corrosion and cause offensive odors. If left unchecked, microbiological growths will… See more ...

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Boiler Layup Procedures – Water Technology Report

Offer Details: Shut off the continuous blowdown system. Blow down all manual valves including the sidewall and waterwall headers. Open the steam drum vent, close the steam non-return valve and the head stop valve. Blow down all manual valves once for every 25 psig decrease in boiler pressure. Draining the Boiler. The last blowdown should be made at 25 psig. See more ...

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Improving Softener Efficiency: How to Reduce the

Offer Details: Improving Softener Efficiency: How to Reduce the Environmental Impact of Salt Discharge. by William (Bill) Harfst September 6, 2016 September 5, 2016. Typical Dual Tank Water Softener Installation. The precipitated impurities are hauled off as a solid waste. See more ...

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Electrode Boilers – Water Technology Report

Offer Details: Electrode boilers are used in industrial applications where large amounts of water must be converted to steam often under short notice. The electrode boilers are of two basic types: Immersion electrode type Water jet or spray type In the conventional immersion type boiler, current flows through a resistance wire, which generates… See more ...

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Reducing Wastewater Discharge by Conservation, Reuse and

Offer Details: Effective water management focuses on keeping freshwater withdrawals as low as possible by the implementation of conservation, reuse and recycle policies. Conservation means eliminating waste whereas reuse and recycle strategies seek ways to use water more than once prior to discharge. Using sound chemical engineering principles, plant wastewater can be regenerated by water treatment methods… See more ...

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calcium phosphate – Water Technology Report

Offer Details: Scale deposits vary in chemical composition. The most common mineral scale is calcium carbonate, since this is the least soluble of the scale-forming minerals found in makeup water supplies. Other scales such as calcium phosphate, calcium sulfate and silica are also frequently found alone or in combination with calcium carbonate. See more ...

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cooling tower – Water Technology Report

Offer Details: In my post of March 2, 2015, Using Soft Water for Cooling Tower Makeup, I discuss the benefits of operating cooling towers at high pH and up to 10 cycles of concentration.Among other benefits, this creates an environment that is outside the amplification range of common bacteria that inhabit open cooling water systems. See more ...

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Using Soft Water for Cooling Tower Makeup – Water

Offer Details: This off-white sludge tends to accumulate in the tower basin and on the fill, but can also foul heat transfer equipment. Calcium hardness, total alkalinity, pH and temperature determine the solubility of calcium carbonate. Traditional cooling water treatment programs control these variables by adjusting the tower bleed to insure that the See more ...

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water softener – Water Technology Report

Offer Details: Typical Dual Tank Water Softener Installation. The softener regenerations take place off-site at the service providers location. Technically, this approach does not reduce or eliminate salt discharge into the environment, since the regeneration still takes place, but at a remote location. See more ...

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Internal Boiler Water Conditioning – Water Technology Report

Offer Details: The application of water treatment chemicals to the boiler feedwater or directly to the boiler constitutes the internal boiler water conditioning process. The goal of this procedure is to control scale formation, mitigate corrosion, and maintain steam quality and purity. The required chemical balances that are selected for a given steam plant are based on… See more ...

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Water Treatment Requirements for Low and Medium Pressure

Offer Details: Low and medium pressure boilers must be protected from scale deposition and corrosion to promote optimum energy efficiency and prolong the useful life of the plant equipment. The definition of low and medium pressure is somewhat discretionary. For the purposes of this discussion, low pressure shall apply to boilers up to 150 psig. These boilers… See more ...

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A Green Approach to Cooling Tower Operation – Water

Offer Details: A Green Approach to Cooling Tower Operation. by William (Bill) Harfst March 9, 2015 March 3, 2015. An abundant supply of fresh water is taken for granted in many parts of the world. This is the off-white, mineral scale that is frequently found in heat exchangers, in the tower fill or deposited in the sump. See more ...

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Water Chemistry Fundamentals – Water Technology Report

Offer Details: WATER AS A RESOURCE Water is one of our most important resources. It is essential for all plant and animal life. Therefore, it is not so surprising that 70% of the earth is covered by water. The earth has 326 cubic miles of water. However, 97% of the water supply is contained in the salty… See more ...

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William (Bill) Harfst – Page 4 – Water Technology Report

Offer Details: Author: William (Bill) Harfst Reverse Osmosis Cleaning Methods. by William (Bill) Harfst November 14, In some cases, dissolve air and gravity separation are used to float impurities to the surface where they are skimmed off for disposal or further treatment. Oil-water separators, for example, remove free oil from oily water waste streams. See more ...

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water treatment – Water Technology Report

Offer Details: Many municipal water treatment plants are required to adjust the water quality to minimize corrosion in the distribution system. In general, adding sodium bicarbonate (baking soda) to increase the alkalinity and pH helps to passivate metal pipe surfaces to reduce corrosion. See more ...

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alkalinity – Water Technology Report

Offer Details: Alkalinity and pH are related, but this relationship is not linear. We often focus on pH as the indicator of the tendency for metals to corrode, for example, but ignore the role alkalinity plays in the corrosion process. which often leads to arc-overs. Under this condition, the boiler goes off-line. Thus, proper pretreatment of the boiler See more ...

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Water Technology Articles – Page 5 – Water Technology Report

Offer Details: The by-products of corrosion, which are commonly described as an off-taste, odor, or appearance, adversely affects the quality of water as it flows through the piping system. This can have some adverse affects on the taste and quality of processed foods and beverages. See more ...

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corrosion – Water Technology Report

Offer Details: The by-products of corrosion, which are commonly described as an off-taste, odor, or appearance, adversely affects the quality of water as it flows through the piping system. This can have some adverse affects on the taste and quality of processed foods and beverages. See more ...

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Water Technology Articles – Page 3 – Water Technology Report

Offer Details: It’s a service, after all, and one would expect to pay more based on the additional labor, materials and transportation required. However, since the units are regenerated off-site, one does not need to contend with the handling and disposal of hazardous acid and caustic regeneration chemicals. Plus, no trained personnel are required. See more ...

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William (Bill) Harfst – Page 2 – Water Technology Report

Offer Details: Author: William (Bill) Harfst Chemical Treatment Requirements for Condensate Systems. When incoming steam is shut off, pressure drops as the unit or system cools. Accumulated carbon dioxide dissolves into the residual condensate causing the pH to drop sharply and accelerating corrosion. Proper drainage from intermittently operated See more ...

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boiler water – Water Technology Report

Offer Details: This leaves a residue of all the solids present in the boiler water. Here heat is transferred to the boiler water through a film of saturated steam resulting in a condition known as film boiling, which is a gross deviation from the desired nucleate boiling condition. See more ...

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corrosion control – Water Technology Report

Offer Details: This off-white sludge tends to accumulate in the tower basin and on the fill, but can also foul heat transfer equipment. Calcium hardness, total alkalinity, pH and temperature determine the solubility of calcium carbonate. This is below the optimum pH range for steel and copper corrosion control. Further, to compensate for the aggressive See more ...

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water quality – Water Technology Report

Offer Details: The maximum permissible cycles of concentration is limited by the makeup water quality, bleed rate and uncontrolled water losses. Set the cycles too high and you risk running the tower under scale-forming conditions. Set it too low and you waste water, chemicals and energy. Makeup Water Quality is a Key Factor See more ...

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William (Bill) Harfst – Page 6 – Water Technology Report

Offer Details: This is the off-white, mineral scale that is frequently found in heat exchangers, in the tower fill or deposited in the sump. To prevent the tower from over-concentrating, a percentage of the cooling water is discharged to drain. The bleed or blowdown rate is adjusted to control the concentration of dissolved minerals to just below their See more ...

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reverse osmosis – Water Technology Report

Offer Details: Reverse osmosis (RO) produces water of excellent purity for many applications including semiconductor manufacturing, pharmaceutical, medical, laboratory and power generation to name a few. Similar advantages can be stated for portable exchange mixed bed polishers since they are regenerated off-site, which essentially exports the hazards and See more ...

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Water Technology Articles – Water Technology Report

Offer Details: The cycles of concentration are controlled by the deliberate bleeding of water from the system. The bleed off water discharges the concentrated solids in the cooling water to drain. The water lost by evaporation and bleed off is replaced by fresh makeup water. See more ...

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membrane separation – Water Technology Report

Offer Details: Membrane separation technology can and is being used to effectively treat municipal and industrial wastewater for reuse as cooling tower makeup. MBR, MF, UF and RO processes eliminate or reduce impurities that might otherwise adversely affect cooling tower operations. See more ...

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water conservation – Water Technology Report

Offer Details: Cooling towers are water conservation devices that save water by rejecting heat to the atmosphere by evaporative cooling and then recycling the water back to the heat exchanger or process. If the plant is equipped with a cooling tower(s), optimum efficiency is achieved by operating the tower at maximum cycles of concentration (COC). See more ...

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water savings – Water Technology Report

Offer Details: water savings Practical Methods for Achieving Cooling Tower Water Savings. by William (Bill) Harfst March 30, 2015 March 29, 2015. This off-white sludge tends to accumulate in the tower basin and on the fill, but can also foul heat transfer equipment. Calcium hardness, total alkalinity, pH and temperature determine the solubility of calcium See more ...

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blowdown – Water Technology Report

Offer Details: The limiting constituent in this case is the total alkalinity, which can be concentrated only ten times. In this case, a blowdown rate of 1/10 or 10% would be required to maintain the boiler water quality within recommended limits. See more ...

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chemical treatment – Water Technology Report

Offer Details: chemical treatment Internal Boiler Water Conditioning. by William (Bill) Either may be applied directly to the boiler water since the chemicals are volatile and distill off with the steam where they are carried to all parts of the steam and condensate return system. Some plants are restricted on the type and amount of amines that can be See more ...

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