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Domestic hot water and heating series: gas hot water boiler, vacuum hot water boiler, vertical atmospheric pressure hot water boiler, electric hot water boiler Factory use, high temperature steam: wns fuel gas steam boiler, szs water tube steam boiler, vertical steam boiler, electric steam boiler
FANGKUAI is founded in 1998, which is a clean fuel boiler enterprise integrating R&D, manufacturing, sales and service. In the past 20 years of development and innovation, the company has grown into a global enterprise, and its products have been exported to more than 80 countries including Russia, Mongolia and Thailand, and have established long-lasting cooperative relations with local enterprises!
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removal of silica scaleon water tube boiler
HOT
Capacity:1-20t/h
Rated thermal efficiency: 100-104%
Fixed working pressure: ≤1.6MPa
Applicable fuel:natural gas etc.
HOT
Capacity:0.7-14MW
Rated thermal efficiency:96-98%
Fixed working pressure:≤1.25MPa
Applicable fuel:Natural gas, light oil, etc.
HOT
Capacity:0.7-2.8Mw
Rated thermal efficiency: 97.2-106%
Fixed working pressure:0.1MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:2.8-7.0Mw
Rated thermal efficiency:≥105.5%
Fixed working pressure:-0.02MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:99Kw
Rated thermal efficiency:97.2-104.4%
Fixed working pressure:1.0MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:0.5-4.0 t/h
Rated thermal efficiency:98%
Fixed working pressure:≤1.25MPa
Applicable fuel:electric energy
Removal of carbon dioxide and oxygen from boiler feedwater is Control of boiler-water chemistry, before and after the water enters the steam generating system, is vital to efficient operation, Silica max (ppm Si0 2) 700-3500 350 15 1100-5400 150 600-3000 300 10 900-4600 90 500-2500 250 8 800-3800 40 200-1000 200 3Get Price
Boiler scale is caused by impurities being precipitated out of the water directly on heat transfer surfaces or by suspended matter in water settling out on the metal and becoming hard and adherent. Evaporation in a boiler causes impurities to concentrate. This interferes with heat transfers and may cause hot spots. Leading to local overheating. Scaling mechanism is the …Get Price
fired tube boilers, products of combustion pass through the tubes, which are surrounded by water. In the water tube boilers, products of combustion pass around the tubes containing water. The tubes are interconnected to common channels or headers and eventually to a steam outlet for distribution to the plant system [Brockman, 1988]. The boiler Get Price
• Fire tube - the fire or hot gases are directed through the inside of tubes within the boiler shell, which are surrounded by water. The tubes are arranged in banks so that the gases can be passed through the boiler up to 4 times before passing out the stack. This system exposes the maximum heat transfer surface to the water. Fire tube Get Price
(2) Presence of silica (SiO 2), even present in small quantities, deposits as calcium silicate (CaSiO 3) and/ or magnesium silicate (MgSiO 3). These deposits stick very firmly on the inner side of the boiler surface and are very difficult to remove. One important source of silica in water is the sand filter. Disadvantages of scale formation Get Price
Apr 26, 2016 · The water then goes through treatment processes, and it is used in a once-through steam generator (OTSG) with additional water (makeup water) to produce steam for the SAGD injectors. At high pressure and temperature conditions, hard scales are formed on the inside surface of the boiler tubes.Get Price
As the boiler pressures increase above 400 psi, there is an increase in the tendency for silica to be selectively carried into the steam in amounts proportionate to the amount of silica present in the boiler water. Problems caused by carryover. Suspended and dissolved solids in the boiler water tend to deposit in the steam and condensate system.Get Price
Sep 01, 2014 · Please contact [email protected] or call 888-707-5814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm. ET), to start a free trial, get pricing information, order a …Get Price
Despite advances in conventional deposit control technologies, high-silica boiler water (>150 mg/L as SiO2) continues to have a major impact on the operation and efficiency of boilers.Get Price
Even a thin layer of scale on the metallic surfaces can reduce the boiler efficiency by 20%. The metal becomes increasingly hotter due to resistance in heat flow and thus the metal becomes more prone to deformation and rupture effect. Layers of scale act as an insulator, reducing the heat transfer rate from the hot zones to the water.Get Price
Mar 09, 2015 · Boiler is used in order to produce steam from water for processing in industry and for power generation in power plants. Regarding to …Get Price
3.2 Boiler feed water treatment options 18 Section 4. Removal of gaseous impurities 4.1 General 20 4.2 Physical de-aeration 20 2 Maximum concentrations of silica in boiler water 11 water-tube boilers operating up to critical pressure; e) once-through boilers, including `coil' and …Get Price
This refers to soluble silica content and not to the silica that may be present in the suspended matter. Suspended matter may be removed from a water supply by coagulation and filtration; such processes have little effect in reducing the soluble silica content. Silica is the only boiler water salt which vaporizes at pressures below 2400 psig. It can vaporize at pressures as low …Get Price
SAMCO's custom-engineered boiler feed water treatment systems can help your facility remove: iron; either soluble or insoluble, iron can deposit on boiler parts and tubes, damage downstream equipment, and affect the quality of certain manufacturing processes. copper; can cause deposits to settle in high-pressure turbines, decreasing their Get Price
Therefore, good internal boiler water treatment programs are necessary. DEPOSITS. Common feedwater contaminants that can form boiler deposits include calcium, magnesium, iron, copper, aluminum, silica, and (to a lesser extent) silt and oil. Most deposits can be classified as one of two types ( Figure 12-1 )Get Price
Boiler water treatment is done to minimize corrosion, deposition, scale, and carryover in the water–steam circuits. The aim is to maximize the reliability of the steam–water circuit. Boiler water treatment has basically two phases: First, we remove impurities from the water to the desired cleanliness.Get Price
Sep 03, 2020 · In boilers, the source of this corrosion could be dissolved gases in the boiler water or the excessive use of Hydrazine which will corrode Copper and Copper alloys, allowing Copper to be carried back to the boiler. Copper in the boiler displaces metal from the tube surfaces and plates out on the tubes.Get Price
Boiler water treatment is a critical part of the preventative maintenance program for any boiler system. Deposition from dissolved solids and other impurities in boiler water form scale on boiler tubes that reduce heat transfer efficiency and increase fuel consumption. Dissolved oxygen in the boiler feedwater system causes corrosion to the Get Price
Clean Boiler Waterside Heat Transfer Surfaces Even on small boilers, the prevention of scale formation can produce substantial energy savings. Scale deposits occur when calcium, magnesium, and silica, commonly found in most water supplies, react to form a continuous layer of material on the waterside of the boiler heat exchange tubes.Get Price
Removal of calcium and magnesium to below 0.5 ppm as calcium carbonate. Removal of silica and/or alkalinity from the makeup water. Plant steam production and operating requirements preclude the use of a precipitating program. Boiler design …Get Price
Softened make-up water quality Mailfunctioning of softener High hardness & silica content Removal of hardness & silica scale (online cleaning) Shell boiler and water-tube boilers up to 20 bar Spiral once-through boilers All types of industry (incl. food industry) O KURiTAGet Price
Boiler water treatment is a critical part of the preventative maintenance program for any boiler system. Deposition from dissolved solids and other impurities in boiler water form scale on boiler tubes that reduce heat transfer efficiency and increase fuel consumption. Dissolved oxygen in the boiler feedwater system causes corrosion to the Get Price
Dec 31, 2021 · Silica is mainly distributing in a specific ratio, according to research. Under any set of boiler settings utilizing demineralized or evaporated grade make-up water, it is distributed between the boiler water and the steam. This ratio is affected by two factors: boiler pressure and boiler water pH.Get Price
Despite advances in conventional deposit control technologies, high-silica boiler water (>150 mg/L as SiO2) continues to have a major impact on the operation and efficiency of boilers.Get Price
Water Treatment, Storage and Blowdown for Steam Boilers. A look at the chemistry of water supplies including hardness and pH values. Before boiler blowdown can be discussed and understood it is necessary to establish a definition of water along with its impurities and associated terms such as hardness, pH etc.Get Price
A boiler (experimental boiler) having a holding water quantity of about 0.15 L', to which scale composed of hardness and carbonate and scale composed of hardness and silica, SiOz, in combination had been deposited, was fed with soft water with a hardness of 0.4 ppm and operated under atmospheric pressure.Get Price
Large water tube boilers are field erected and may be unique design Fire Tube Boilers. to remove suspended solids in boiler water Blowdown - Removes boiler water with Silica 6 0 % Condensate 50 Basic Boiler Calculations. Calculate the feedwater composition (impurities) Get Price
Silica Descaling Chemical. Silica is considered to be the hardest deposit to be removed from heat exchangers like condenser tubes and boiler tubes. Removal of silicated scales help in easy removal of silica and silicate deposits. Silica being the only salt inside boilers which vaporizes at pressures below 2400 psig, vaporizing at pressures as Get Price
May 04, 2021 · Boiler failure is a major concern for heating and power plants, and the corrosion associated with the boiler's water quality is known to be the main cause.The total cost of boiler tube failures in power plants is estimated to be about $5 billion a year (note that this figure is from 2009, so is likely to be much higher.) To ensure the long-term safe operation of a boiler, the …Get Price
May 02, 2000 · ASME Guidelines for Water Tube Boilers Drum Pressure Iron Copper Total Silica Total Conductivity 0-300 0.100 0.050 0.300 150 700 7000 301-450 0.050 0.025 0.300 90 600 6000Get Price
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