Kvaerner Pulping Ab

Metso Power Oy

Teknologian Tutkimuskeskus Vtt Oy

Valmet Technologies Oy

Ismo Hirvonen

Jani Lehto

Markku Raiko

Tuomo Hilli

Mikko Anttila

Sampo Ratinen

Randy Stern

Kristin Onarheim

Yrjo Solantausta

Yrjö Solantausta

Disclosed herein is an apparatus and a method for producing a pyrolysis liquid, wherein the pyrolysis liquid is formed by means of pyrolysis from a raw material by forming, and a pyrolysis reactor, a gaseous pyrolysis product by pyrolysis and condensing it in a condenser into a pyrolysis liquid, and feeding circulation gas into the pyrolysis reactor. The circulation gas is conducted by a liquid ring compressor into the pyrolysis reactor and purified before being conducted into the pyrolysis reactor, and the pyrolysis liquid is used as the liquid layer in the liquid ring compressor.

Method and apparatus for producing a pyrolysis liquid

The present invention relates to a process and a device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances which are to be concentrated. The liquid is heated to close to boiling temperature in a heat exchanger () of the falling-film type. The process is characterized in that the pressure on the liquid side in the falling-film heat exchanger () is kept so high that boiling does not take place in this heat exchanger and in that the evaporation takes place, by means of flashing, in a separate expansion tank () that has a lower steam.

Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances

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Tampere, Finland

Ismo Hirvonen