Circulating mass dryer and method for drying wet sludge
AssigneeEndev Oy
InventorSeppo Ruottu
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Abstract
The invention relates to a circulating mass dryer for drying wet sludge. According to the invention, the circulating mass dryer includes two adjacent circulating mass systems in heat exchange communication with one another, wherein the first circulating mass system is a sludge drying side and the second circulating mass system is a heat releasing side, and the first and the second circulating mass system each comprises at least one elongated riser (3, 16), and the riser (3) of the first circulating mass system and the riser (16) of the second circulating mass system are adjacent in such a way that a common heat exchange surface is formed therebetween. In addition, the invention relates to a corresponding method.
Claims21
A circulating mass dryer for drying wet sludge, the dryer comprising:
- a first circulating mass system and a second circulating mass system in heat exchange communication with one another,
- the first circulating mass system being a sludge drying side comprising:
- a first elongated riser with a sludge inlet port, a first fluidization material port, and a gas feeding port;
- and
- a return channel in fluid communication with the first riser;
- and the second circulating mass system being a heat releasing side comprising:
- a second elongated riser with a second fluidization material port, and a heat releasing material feeding port;
- the first elongated riser of the first circulating mass system and the second elongated riser of the second circulating mass system being adjacent and separated by a heat exchange surface therebetween.
A method for drying wet sludge in a circulating mass dryer comprising a first circulating mass system and a second circulating mass system in heat exchange communication with one another, wherein the first circulating mass system is a sludge drying side comprising a first elongated riser, a sludge inlet port, a first fluidization material port, and a gas feeding port, and a return channel in fluid communication with the first riser, wherein the second circulating mass system is a heat releasing side comprising a second elongated riser with a second fluidization material port, and a heat releasing material feeding port, and wherein the riser of the first circulating mass system and the riser of the second circulating mass system are adjacent in such a way that a common heat exchange surface is formed therebetween,
- the method comprising:
- feeding wet sludge, a first fluidization material, and gas to the first circulating mass system;
- and
- feeding heat releasing material and a second fluidization material to the second circulating mass system.
Dependencies are inferred from the claim text.