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SMELT SPOUT OF RECOVERY 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
Insertable Smelt Spouts continued The design, installation and maintenance of smelt spouts, used to discharge liquid smelt from the furnace to the dissolving tank, are important to the safe, reliable operation of Kraft recovery boilers. To address the explosive nature of smelt-water interactions and theGet Price
Solenis offers a variety of chemical and equipment solutions for recovery boiler systems, including feedwater, condensate and internal boiler water treatments; organic and inorganic corrosion inhibitors for smelt spout cooling systems; monitoring and control systems; and proprietary statistical software that can detect leaks with maximum Get Price
Recovery boilers also improved the smelt removal. It is removed directly from the furnace through smelt spouts into a dissolving tank. Some of the first recovery units employed the use of Cottrell's electrostatic precipitator for dust recovery. Babcock & Wilcox was founded in 1867 and gained early fame with its water tube boilers.Get Price
Nov 05, 2021 · Below are four inventions and innovations that have improved the working conditions around recovery boilers and made operation of the boiler more stable. Smelt Spout Micro Hood Arrangement. One area considered the most dangerous for operators, and one of the leading causes of recordable injuries is the spout deck on a recovery boiler.Get Price
The boiler had four smelt spouts. The runoff problems were clearly indicated by the abrupt change in exit temperature of the spout cooling water. Since all four spouts responded si-2. Summary of heavy runoff incidents in recovery boilers with different bottom types.Get Price
The purchaser of a recovery boiler should be aware that the ASME Boiler Code is a minimum standard. Due to the nature of operating conditions of recovery boilers, these stacked and fin studs in smelt spout openings. Fabrication and construction details should, therefore, be …Get Price
Sep 11, 2013 · Recovery boiler boiler is a special unit used for obtaining soda or to purify inorganic chemical compounds (chemical recovery) contained in the black liquor from the digester and the rest of the cooking as well as generating high-pressure steam (high pressure steam). compound called smelt. Melt chemicals (smelt) will gather around the Get Price
recovery boilers. Cracks also are found in tubes at smelt spout openings; in tubes that form air port openings and in wall tubes near the floor. The main focus of this TIP is cracks in the alloy cladding (or overlay), although cracks also occur in the membrane between tubes, in membrane welds and in other welds on the tubes. Cracks in welds andGet Price
The smelt spout area is one of the least desirable work environments in a recovery boiler, nonetheless regular spout cleaning is needed for efficient and smooth operation. ANDRITZ has developed Smelt spout robot, a fully automated robot …Get Price
smelt spouts and that the cracked area often was centered in fiat of the spouts. In one boiler it was reported that the worst cracking was located just before the downward bend to the header. Cracking has also been detected in boilers with composite wall tubes that extend for a short distance into the floor before joiningGet Price
May 03, 2011 · Fig. 17.9 shows a recovery boiler building at a brown paper mill. The purpose of the recovery boiler is to recover the inorganic chemicals as smelt (sodium carbonate and sodium sulfide), burn the organic chemicals so they are not discharged from the mill as pollutants, and recover the heat of combustion in the form of steam.Get Price
the reduction efficiency for the three spouts were found to be in the same range as at Mill B, with typically very low thiosulphate and sulphate levels. Similar smelt analyses for samples taken from the recovery boiler at Mill D are shown in Table IV. At Mill D, the variability from spout to spout was less than that seen in Mills B and C.Get Price
To improve safety and make smelt spouts more accessible for cleaning, several recovery boiler suppliers developed smaller individual hoods for the smelt spouts, referred to as mini or micro-hoods. Compared to the larger hood designs, this arrangement allows for easier access to the individual spouts for cleaning and maintenance (Figure 3).Get Price
surges, substantial dissolving tank action). These tasks incorporate rodding and cleaning the smelt spouts and air ports just as embedding, evacuating and cleaning liquor guns. 2. SODA RECOVERY BOILER The recovery boiler is the important component of the Kraft recovery process and a major recovery boiler explosion isGet Price
In kraft recovery boiler operations, molten smelt (mainly consisting of sodium carbonate and sodium sulfide, and small amounts of sodium sulfate, sodium chloride, and potassium salts) flows out of the boiler at 800°C-850°C down a number of spouts, at a flow rate on the order of 1 L/s per spout, before falling into the dissolving tank belowGet Price
4-1 Recovery Boiler Equipment and Operation. FIG. 1 shows a typical smelt spout area of a recovery boiler, which comprises smelt spouts 1, along which the smelt is directed from the furnace 2 to the dissolving tank 3. Typically, the smelt is very hot (for example 750 to 820° C.).Get Price
flue gas from the boiler Operate on a balanced draft FD Fan ID Fan Recover Inorganic Chemicals Recover the inorganic chemicals as a molten smelt of Na 2S and Na 2CO 3 Na 2S requires a local reducing (oxygen deficient) environment Some S leaves as Na 2SO 4 – incomplete reduction measured by reduction efficiency Runs out of the furnace through spoutsGet Price
Jan 29, 2020 · Smelt spouts have a limited lifetime and that is due to thermal stresses but also erosion effect of the smelt flow during an operation. Molten smelt exits the recovery boiler at a temperature as high as 850 °C (1500 °F). So not surprisingly, the smelt spouts are under a …Get Price
Safe Firing of Black Liquor in Black Liquor Recovery Boilers April 2019 Page 7 In January 1962, the Black Liquor Recovery Boiler Advisory Committee was formed by representatives of the pulp and paper industry, manufacturers of black liquor recovery boilers and insurance companies providing coverage on black liquor recovery boilers.Get Price
Recovery Boiler Corrosion Chemistry Sandy Sharp and Honghi Tran Symposium on Corrosion in Pulp and Paper Mills and Biorefineries, RBI at Georgia Tech., November 14, 2014 SharpConsultant University of Toronto Pulp and Paper Centre Introduction Smelt Spouts are vulnerable toGet Price
The cleaning apparatus for the smelt spout of a recovery boiler according to the invention comprises a path and a cleaning unit, which comprises …Get Price
A smelt spout opener for opening a smelt spout of a furnace used in a chemical recovery process in which concentrated black liquor is burned in the furnace to produce a gas and a hot molten smelt in the bottom of said furnace and the hot molten smelt is discharged from said furnace via a smelt spout where said smelt has solidified in or about Get Price
Insertable Smelt Spouts continued The design, installation and maintenance of smelt spouts, used to discharge liquid smelt from the furnace to the dissolving tank, are important to the safe, reliable operation of Kraft recovery boilers. To address the explosive nature of smelt-water interactions and theGet Price
Oct 01, 2019 · A total of 573 domestic recovery boiler incidents were reported to BLRBAC between fall 2009 and spring 2019. 4 Smelt Water Furnace Explosions. Boiler Location. Smelt Spout Failures - And Get Price
4-1 Recovery Boiler Equipment and Operation. FIG. 1 shows a typical smelt spout area of a recovery boiler, which comprises smelt spouts 1, along which the smelt is directed from the furnace 2 to the dissolving tank 3. Typically, the smelt is very hot (for example 750 to 820° C.).Get Price
Smelt Spouts. The design, installation and maintenance of smelt spouts, used to discharge liquid smelt from the furnace to the dissolving tank, are important to the safe, reliable operation of Kraft recovery boilers. Since supplying the first Kraft recovery boiler in 1929, B&W has led the development of many improvements in safer, longer-lasting operation of smelt spout systems.Get Price
Our smelt spout can be utilized on any recovery boiler, and it is suitable for your local boiler condition. The smelt spout is based on proven technology, and our smelt spout area is a complete solution with tube openings, wall box, spout, …Get Price
21 Kawnish Kirtania Recovery Boiler Size • The average size of recovery boiler has grown significantly in each year • The nominal capacity of new recovery boilers at the beginning of the 1980s was 1700 metric tons of dry solids per day • By year 2000 more than ten recovery boilers, capable of handling 2500 … • 3500 metric tons of dry solids per day were built.Get Price
• Liquor System - heavy black liquor storage through dissolving tank and smelt spout cooling system. • Boiler Water - boiler makeup treatment facilities and condensate return systems through recovery boiler steam outlet non-return valve. • Furnace Gas - Combustion air fan inlet through flue gas stack outlet including sootblower.Get Price
Oct 01, 2019 · Recovery Boiler Ash Pulp and Paper Smelt Spouts Black Liquor Pulp and Paper ESP Dissolving Tank Explosion About Fornax Services A group of people that combined engineering, software development, and passion.Get Price
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