30 PROJECTS & CONTRACTS


First of five tissue lines at Yibin in China started up


Y


ibin Paper Co in China successfully started up its TM2 tissue making line in September,


the first of an order for five machines, the remaining four of which will be commissioned before the end of 2018. The paper maker, located at Yibin in central China, was founded in 1944 as China Paper Mill and now mostly makes high-grade paper- cup base paper and bamboo pulp. The TM2 line, supplied by A.Celli


Paper, has a design speed of 1,800 metres per minute, an operating


and a Dust Removal system. A.Celli, based in Lucca, Italy, said


Yibin workers celebrate the start-up of their first tissue line


speed of 1,600 m/min and an untrimmed roll width of 2,850mm. The project included the delivery of an iDEAL tissue


machine along with an Approach Flow system complete with Crescent Former machines, an MCS control system, an Air System


SCA Östrand’s pulp mill capacity in Sweden more than doubled


The start-up of new technologies and equipment has been successfully completed at SCA’s Östrand pulp mill in Sweden by Andritz. At around US$875 million, the mill expansion is the largest-ever industrial investment in northern Sweden. SCA Östrand is doubling its annual production capacity from 430,000 to 900,000 tons, making it the largest mill in the world for softwood kraft pulp. The list of technologies is


comprehensive. It includes a complete debarking


plant with two parallel debarking and chipping lines each consisting of a PowerFeed de-icing conveyor, a hydrostatically-supported debarking drum measuring 5.5 x 39 metres with a capacity of 425 cubic metres sob/h, and a horizontally-fed, XL-size HHQ- Chipper operating with a TK-IV


September/October 2018


knife system. The delivery also includes two new-generation HQ-Press bark presses resulting in excellent bark dry content, as well as modernisation of the existing chip-handling system. The pulp drying system includes


an EvoDry system with energy- saving technologies that reduce the mill’s operating costs, including a boiler-exhaust energy- recovery system, fine screening, a twin-wire dewatering system with a fully-automatic tail-threading system to meet strictest health, safety, and environmental regulations, a new-generation sheet dryer for lowest downtime and fast start up, as well as a cutter and two baling lines. New recausticising machinery includes a LimeGreen green liquor filter providing efficient filtration with a minimum of waste going to landfill, two LimeFree


centrifuges for dregs, LimeSlake technology, LimeWhite disc filter to optimise white-liquor quality, and a LimeDry lime mud disc filter upgrade. The capacity of the existing lime kiln was increased without the need for a new replacement by using LimeFlash technology. The delivery also included upgrade of the existing wood dust burning system, which Andritz supplied in 2011. The recovery boiler capacity


was increased from 3,300 to 5,000 tds/d. The existing boiler had been supplied by Andritz in 2006 and had been designed to enable a major extension by moving the boiler side wall and widening the heating surfaces of the superheater, boiler generation bank, and economisers. The boiler extension enables optimum flue gas flux before and


that the start-up and subsequent running-in all went smoothly. Yibin’s management are said to have expressed great satisfaction with the result and highly praised A.Celli’s professional work. When the five machines are running the tissue production capacity of the mill will be 120,000 tons a year. Yibin’s capacity for paper cup base paper is 200,000 tons a year and for bamboo pulp is also 200,000 tons a year.


Pulp Paper & Logistics


SCA’s Östrand investment makes it the biggest softwood kraft pulp mill in the world


after the rebuild, which is said to offer great benefits compared to traditional technology for expanding the recovery boiler, by moving its front wall. The total increase of the boiler width was 3.8 metres. In addition to boiler enlargement, one additional electrostatic precipitator chamber and feed water pump were added.


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