Valmet Technologies Oy

Lauri Kokko

Risto Hämäläinen

Joakim Autio

Teppo Riihimäki

Naveen Chenna

Tarja Korhonen

Teppo Riihimaeki

Antti Kaura

A method for producing aqueous hydrochloric acid from flue gases is provided. The method comprises conveying water to a first scrubber () or to a line () to use the water in a scrubbing liquid of the first scrubber. The method also comprises providing flue gas containing chlorides into the first scrubber () and scrubbing the flue gas containing chlorides with the scrubbing liquid by contacting the flue gas with the scrubbing liquid in the first scrubber (). Dilute hydrochloric acid and a flue gas derivate () are produced. The method comprises letting out at least some of the dilute hydrochloric acid from the first scrubber () as a scrubber bleed, separating solids suspended by the scrubber bleed in a solids separator (), conveying the scrubber bleed from the solids separator () into an evaporation vessel () and concentrating the scrubber bleed in the evaporation vessel () to produce hydrochloric acid vapor having a concentration of 5-22 wt-%. A corresponding system is also provided.

Method and a system for producing hydrochloric acid from flue gases

A filter for filtering pyrolysis oil and an arrangement. The filter is a split-flow filter (), comprising a filter element (), comprising plurality of apertures () extending through the filter element (), a receiving channel () for receiving a flow (F) of pyrolysis oil to be filtered and for supplying said flow on first side (A) of the filter element (), a main discharge channel () arranged on the first side (A) of the filter element () for discharging the portion of the flow (F) of pyrolysis oil having not penetrated through the filter element (), and a filtrate channel () arranged on second side (B) of the filter element () for discharging the portion of the flow (F) of pyrolysis oil having penetrated through the filter element ().

Filter and filtering arrangement

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Tampere, Finland

Lauri Kokko