Method for burning evaporated waste liquor

Details Method for burning evaporated waste liquor Method for burning evaporated waste liquor

1988-01-15

1989-11-21

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 3011, 110238, 110244, 110348, D21C 1112, D21C 1114, F23L 100, F23G 704

Patent

active

048820105

ABSTRACT:
In a method for burning evaporated waste liquor obtained at pulp production in accordance with cooking processes on sodium basis for recovering sodium carbonate and sulphide, the liquor (10) is injected towards the inlet end side (4) of a cylinder-shaped reaction chamber with mainly tangential gas supply (6). In this cyclone (2) the liquor is dried and pyrolysed by hot fumes recirculated from the outlet portion (12) and obtained through the ejector action of the liquor injection. After ignition of the pyrolysis gas and rests of the liquor the formed smelt (16) is discharged after sulphuration from the outlet portion of the cyclone. The fumes of the cyclone are oxidized in a separate furnace (14) after the cyclone (2). A stable and, from a process technical point of view, suitable combustion without support firing with any other fuel can be maintained with liquor including 25-40 % of water.

REFERENCES:
patent: 3867251 (1975-02-01), Holme
patent: 4350101 (1982-09-01), Prudhon et al.
patent: 4462319 (1984-07-01), Larsen
patent: 4562778 (1986-01-01), Bernard et al.

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