Suzano Mucuri White Liquor Plant: Industrial Experience with a Large Single Line, 2010 TAPPI/PAPTAC International Chemical Recovery Conference

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Suzano Mucuri expansion project consisted of a new line that increased the mill production by 1.000.000 ADTM/ year of eucalyptus pulp. With this production the new pulp line is one of the biggest single fiber lines in the world in operation. The orders for the main packages were made in November 2005 and the project delivery time was 21 months.

One single line white liquor plant with a capacity of 10,000 m3 WL/d and 900 MTPD lime kiln supports the pulp mill production exceeding one million tons per year. The recausticizing includes state-of-the-art disc filters for green liquor, white liquor and lime mud. It is actually the first recausticizing line with 3 Disc Filters in operation, the so called 3D concept. This concept provides shared spare parts between the filters, common operating principle and more flexibility since the green liquor filter can be also operated as a white liquor filter.

The lime kiln is one of the biggest flash dryer kilns at the size of 5 x 125 m. It is equipped with special features for large kilns as the semi-rigid supports and hydraulic thrust roller. The electrostatic precipitator has 2 chambers with space in the layout for a third chamber if needed in the future. The kiln is further equipped with the high efficient COMPAX^TM burnt lime cooler.

In August 2007 the white liquor plant started-up. After six months of operation the plant demonstrated good performance at nominal capacity. The White Liquor Plant has proven to be flexible and easy to operate. It is for example possible with the 3D concept, to operate the white liquor plant with 60% of its nominal capacity, using the green liquor disc filter to produce filtered white liquor.