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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 external deposits of boiler tubes
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
Especially long-stretched horizontal designed boiler passes such as those often found in waste incineration plants, can be ideally cleaned by automatically operated pneumatic rapping as the deposits are mostly of porous characteristics. This cleaning technique can be applied to remove deposits from the heating and reaction surfacesGet Price
Symptoms: External tube wall loss and increasing tube strain. Tubes commonly have a pock-marked appearance when scale and corrosion products are removed. Causes: Fuel ash corrosion is a function of the ash characteristics of the fuel and the boiler design. It is usually associated with coal firing, but can also occur for certain types of oil Get Price
The start of the boiler operation (e.g. after periodic surveys) or its switch-off causes a dilatation in tubes length and leads to the deposit fall-off. A characteristic variation in ash deposit cross-section along the path of flue gases is schematically shown in Fig.l. Primarily, the deposit is formed on the front part of the tubes (Fig.2) and Get Price
An annual RYDLYME cleaning of boiler tubes will dissolve and remove the calcium, magnesium, rust, and other deposits into solution without harming the components within your boiler.Another benefit to cleaning boiler tubes with RYDLYME is that …Get Price
Excessive sludge formation disturbs the working of the boiler. Sludge can be removed by using 1) Softened water 2) by blow down operation i.e. drawing off a portion of the concentrated water. Scales: Hard deposits firmly sticking to the inner walls of the boiler. Difficult to remove, even with the help of hammer & Chisel.Get Price
Apr 14, 2014 · Slag deposits on boiler tubs will act as insulation, preventing the heat produced by the boiler from transferring to the water inside the tubes. Photo courtesy of …Get Price
Apr 14, 2014 · Slag deposits on boiler tubs will act as insulation, preventing the heat produced by the boiler from transferring to the water inside the tubes. Photo courtesy of …Get Price
External scaling and internal deposit buildup on boiler tubes reduce efficiency by acting as barriers to heat transfer. Analysis can determine the composition of the scale/deposit thereby providing insight about its source. Once the source has been identified, steps can be recommended for removal and mitigating future scale/deposit formation Get Price
– Deposits insulate the metal from cooling effects of the incoming saturated steam and lead to overheating of the metal on the fireside causing failure of superheater tubes – Silica from shore water makeup vaporizes with steam and deposits on tubes – Boiler water carryover with saturated steam causes internal sodium solids depositsGet Price
4 deposits Caustic SCC where tube-to-drum seals leak and concentrate alkaline boiler water chemicals 15 Superheater Highest metal temperatures, but high p O 2 forms surface oxides Tolerable corrosion on CS tubes to 400°C (750°F): Fe 3 O 4Get Price
Jun 01, 2009 · If the deposit quantity is above 40 mg/cm squared, then the tube is termed dirty and acid cleaning is recommended. The type of acid to be used for cleaning will depend upon the chemistry and adherence of the deposits to the tube surface. If the deposit contains copper from the pre-boiler system, then this has to be first removed.Get Price
Cost of boiler tube failures 9/4/2013 Steag O&M Company 7 The cost of boiler tube failures is comprised of three main components; the cost of the repair, the cost of start up oil to return unit to service, and the cost of lost production. A rule of thumb for repair costs of 200000 per day out of service+ cost of materialGet Price
Designed specifically for boiler tube cleaning and having been in service for many years, the Ferret has proven to be the tool of choice for many boiler maintenance teams. Cleans from 20mm upwards. Requires only 45cm of clearance at the front of the boiler. Unique two-way action efficiently removes stubborn deposits. CE Approved.Get Price
Jun 12, 2013 · Although cleaning slag from the inside of the boiler and exterior of the boiler tubes is a key aspect of keeping a boiler efficient, cleaning any deposits that may form on …Get Price
travel to the boiler. These metal oxides deposit on the hottest part of the boiler tubes and create insulating deposits. From the heat transfer discussion in section 5.1, such insulating deposits increase the temperature gradient needed to provide a constant heat flux. The temperature rises on the tube wall, and overheating may result.Get Price
scale on the boiler surfaces. Deposits of either the soft bicarbonate or the hard sulphate scale are undesirable as they will keep the water away from the metal of the boiler tubes and plates causing overheating of these surfaces. The dissolved solids, being in solution in the water, cannot be removed by filters or settling tanks.Get Price
Clean Firetube Boiler Waterside Heat Transfer Surfaces The prevention of scale formation in firetube boilers can result in 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
Symptoms: External tube wall loss and increasing tube strain. Tubes commonly have a pock-marked appearance when scale and corrosion products are removed. Causes: Fuel ash corrosion is a function of the ash characteristics of the fuel and the boiler design. It is usually associated with coal firing, but can also occur for certain types of oil Get Price
surface deposits. This information can be determined through a tube sampling and deposit analysis pro- gram. When sampling for internal deposits, the tube samples should be removed from the high heat-input zones of the boiler's furnace and areas where problems have occurred or presently exist. The amount of internal deposit, termed depositGet Price
ure itself. The catastrophic nature of a ruptured tube boiler tends to blow I.D. deposits from the surface of interest. The second problem is the lack of available tools for the analysis of the deposits. A third problem is the lack of knowledge of the history of the tube and feed- water-chemistry treatments including chemical cleaning.Get Price
Gas flow parallel to boiler bank tubes Two-drum boiler Large number mounted external to boiler – when activated they go in and then retract. 16 Deposit Removal with Sootblowers Adams (KROS 2006) Electrostatic PrecipitatorGet Price
TREATMENT FOR FOULING. Additives are used to control fouling by elevating the melting point of the deposits, by physically diluting deposits, or by providing a shear plane to assist in removal by soot blowing. Additives used to control …Get Price
4 Types of Boiler Tube Cleaning Methods | The Court Square Get Price
quality of the finished water to avoid the three major boiler system problems— deposits, corrosion, and carryover. DEPOSITS Deposits, particularly scale, can form on any water-washed equipment surface— especially on boiler tubes—as the equilibrium conditions in the water contacting these surfaces are upset by an external force, such as heat.Get Price
Abstract Boiler tubes are a vital component in the steam/. power co-generation plants. Depending on materials, fuel. used, and operation practices, different failures could. occur. Most of these Get Price
Frequently inspect the boiler for any abnormalities in operation and external appearance Water side inspections should be planned at intervals, every 6 or 12 months depending on operation. Important to check for deposits at water side or blockage of tubes etc. Inspection and CleaningGet Price
The aim of Chemical Cleaning is to is to safely remove all deposits from the inside of the boiler tubes. mill scale, oil, paint, preservatives, rust, welding slag's that would have entered during the assembly of new tubes. Steam piping must beGet Price
One of the most common is iron oxide deposition on radiant wall tubes. Iron oxide deposits are often quite porous and act as miniature boilers. Water is drawn into the iron oxide deposit. Heat applied to the deposit from the tube wall generates …Get Price
pitting can result with possible rupture of boiler condensate piping or boiler tubes. 3.3.4 Rusty water in the boiler gage glass is a sure sign of acid corrosion in the boiler feedwater/condesate system or in the boiler itself. 3.3.5 Make-up water is the major source of carbon dioxide. The first priority is to minimize the amount of make-up water.Get Price
May 27, 2006 · Stress assisted corrosion (SAC) of carbon steel boiler tubes is one of the major causes of waterside failure in industrial boilers. SAC is a major concern for kraft recovery boilers in the pulp and paper industry as any water leak into the furnace can cause a smelt-water explosion in the boiler.Get Price
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