Laos pulp mill - Empire of the sun
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Empire of the sun

Sun Paper Holding Laos started up its 300,000 t/a greenfield pulp mill near the small town of Xepon, Savannakhet Province, Laos, last year after just 20 months from the signing of supplier contracts. ANDRITZ was chosen to supply various key technologies for the project.

Discussions were entered into with ANDRITZ in the second half of 2016, and Sun Paper ordered a number of key technologies for the new pulp mill in Laos, including equipment for the woodyard, fiberline, pulp drying, recausticizing plant, and methanol liquification. Importantly, Sun Paper also ordered an ANDRITZ HERB recovery boiler, now the largest of its kind in the country.

Liang Hongjin, Pulp Mill Production Director, Sun Paper Laos, says, “The main reason ANDRITZ was chosen as one of the major suppliers for this project in Laos was because at Sun Paper we already have a lot of experience with pulp production at our two sites near our headquarters in China. It is recognized that ANDRITZ supplies some of the best performing technology and most reliable equipment for pulp mills.”

The project itself kicked off with contracts being signed in January 2017 and the first deliveries taking place later in the year. In total, some 2,000 people worked on the project with 100 of Sun Paper’s employees coming in from China.

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“ANDRITZ supplies some of the best performing technology and most reliable equipment for pulp mills.”

LIANG HONGJIN
Pulp Mill Production Director
Sun Paper Laos

THE HERB RECOVERY BOILER – SAFETY, EFFICIENCY, STABILITY

Environmental and safety concerns were at the top of the list when it came to choosing the best technology for the Laos project. The recovery boiler was centrepiece to these concerns and, from the outset, Sun Paper was looking for the best and most efficient technology. ANDRITZ supplied the mill with the largest HERB recovery boiler in Laos with a capacity of 2,200 tds/d, but it was much more than simply capacity the mill was looking for. Fei Da, Recovery Island Director, Sun Paper Laos, explains, “We needed proven recovery boiler design and operation for this project in Laos, as we needed to be certain of safe, reliable, and stable operation, especially since we are in such a remote location, and the recovery boiler would be our only source of power.

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“We knew that with ANDRITZ HERB technology we would be getting the safety, high efficiency, and ultimate reliability that we needed.”

FEI DA

Recovery Island Director
Sun Paper Laos

PULP DRYER – A REPEAT ORDER

The pulp dryer supplied by ANDRITZ at the Laos mill was a repeat order of a similar dryer installed at Sun Paper’s headquarters in China. A complete pulp drying line with a TwinWirePress pulp machine, airborne dryer, cutter-layboy, and bale finishing system was supplied. In addition, ANDRITZ supplied equipment for broke handling and process water treatment as well as the control systems for the dryer, cutter, and baling line.

Zhou Yang, Pulp Dryer Manager, Sun Paper Laos, says, “We were very pleased with runability and stability of the first pulp dryer we had installed from ANDRITZ in China; it made good sense to go ahead and order another one for Laos.

READY FOR THE FUTURE

Ding Xingban, Fiberline Manager, Sun Paper Laos, says, “From the HHQ-Chipper in the wood yard to the pulp dryer and bale finishing system, we are delighted with how this project has gone. In the space of around 16 months, this mill in Xepon has gone from bare ground to start-up, with everything now running well.

“The ANDRITZ team has been excellent in the project delivery and most of all in the way they share knowledge; the sales and service people are always coming to us, presenting new technology, or opening us up to new market ideas.”

Gong Tieren, Fiberline Sales Director, ANDRITZ, with the Sun Paper production team in front of the dryer at Laos

ANDRITZ supplied the mill with the largest HERB recovery boiler in Laos with a capacity of 2,200 tds/d, in order to secure safe and reliable operation.

The pulp drying line consists of a TwinWirePress pulp machine, airborne dryer, cutter-layboy, and bale finishing system.

SCOPE OF SUPPLY

WOODYARD:Main process equipment including HHQ- Chipper, with a capacity of 250 m3 sub/h, chip screening and bark processing.
FIBERLINE:MC equipment for the complete fiberline as well as screening equipment and ozone bleaching stage.
RECOVERY BOILER:The largest HERB recovery boiler in Laos with a capacity of 2,200 tds/d, a steam temperature of 480 °C, steam pressure of 84 bar, and steam flow of 96 kg/s.
PULP DRYING:A complete pulp drying line with a TwinWirePress pulp machine, airborne dryer, cutter-layboy, and bale finishing system.
RECAUSTICIZING:A LimeWhite white liquor filter for the recausticizing plant.
METHANOL LIQUEFACTION:A methanol liquefaction system to produce additional fuel for the recovery boiler and lime kiln from gases from the evaporation plant.

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