US7891325B2 - Cleaner for the smelt spout of a recove
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.). The possible splashes of smelt cause danger to the personnel working and moving in the surroundings.
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Smelt spout robot for recovery boiler - ANDRI
The smelt spout area of a recovery boiler is one of the least desirable and sometimes also a dangerous place to work. However, essential regular tasks need to be carried out for efficient and smooth operation of the boiler. Smelt can cause several issues in the spout area as it tends to coagulate and plug the spouts and needs regular cleaning.
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Failure of Smelt Spouts in Kraft Recovery Boile
furnace section of recovery boiler & smelt stream Could trigger a smelt-water explosion capable of destroying the boiler Significance manifested through published set of recommendations for proper smelt cooling system design, operation & maintenance BLRBAC suggests annual replacement – Ensures that failures are rare, but
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US9228745B2 - Cleaner equipment for the smelt spouts of
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.). The possible splashes of smelt cause danger to the personnel working and moving in the surroundings.
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4-1 Recovery Boiler Equipment and Operati
Spouts and Dissolving Tank Spouts – water-cooled troughs mounted in or on furnace at spout openings near hearth Spout cooling water system Agitated tank to dissolve smelt and make green liquor Shatter jets or other means to break up smelt stream as it enters the tank Sootblowers Use a steam jet to remove deposits Superheater Generating bank
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Recovery boiler is the part of Kraft process of pulping where chemicals for white liquor are recovered and reformed from black liquor, which contains lignin from previously processed wood. The black liquor is burned, generating heat, which is usually used in the process or in making electricity, much as in a conventional steam power plant.The invention of the recovery boiler by G.H. Tomlinson
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(PDF) Smelt spout corrosion in a recovery boil
Severe corrosion led to an in-service failure of one of the six spouts on a recovery boiler at Cenibra. The failure resulted in a large amount of cooling water entering the boiler and contacting
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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. Our latest innovation is a new, boiler wall-mounted hood enclosure design.
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Black Liquor Recovery Boilers - An Introducti
Molten smelt accumulates on the floor (protected from overheating by refractory or by solidified smelt) to a level of several inches before flowing out water-cooled smelt spouts to the smelt dissolving tank. It is the pool of molten smelt, at a temperature of 1700°F - 1800°F (925°C - …
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Our smelt spout can be utilized on any recovery boiler, and it is suitable for your local boiler condition. Valmet has a high set goal to be able to supply spare parts for our customers. The smelt spout is based on proven technology, and our smelt spout area is a complete solution with tube openings, wall box, spout, hoods, shattering equipment
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4-1 Recovery Boiler Equipment and Operati
boiler through smelt spouts. One feature of recovery boilers is the presence of a char bed on the hearth. char bed. The char bed consists of a pile of partially pyrolyzed black liquor solids, carbonaceous material and inorganics that accumulate on the hearth. It acts as …
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