首页> 外文会议>International Chemical Recovery Conference v.1; 20040606-20040610; Charleston,SC; US >Advanced Efficiency Options - Increasing Electricity Generating Potential from Pulp Mills
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Advanced Efficiency Options - Increasing Electricity Generating Potential from Pulp Mills

机译:先进的效率选项-提高纸浆厂的发电潜力

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The pulp and paper industry faces new era. New environmental expectations have appeared. Cutting down air emissions is not enough. Pulp and paper mills need to maximize their bioenergy potential and minimize their electricity consumption to produce green electricity. Energy efficiency has increased both in generating and consumption so that the newest pulp lines produce a surplus of electricity without firing mill bark and wood residues. Reducing the heat consumption in the mill has reduced the back pressure power potential and more and more of the power generated is actually condensing power. Higher black liquor dry solids generates more steam. Today's challenge is to have integrated pulp and paper mills that operate totally without auxiliary fuels producing a net surplus of electricity from 100% biomass fuels. The first Tomlinson recovery boilers started operating in Canada 70 years ago. Recovery technology developed from early inefficient chemical recovery to modern large plants. 2004 marks the year when the first Canadian commercial black liquor gasifier starts operation. Black liquor gasifiers pose a challenge to recovery boilers. The size of pulp lines has increased. In the largest lines we talk about utility sized recovery boiler power production ( > 100 MWe). Economics of scale means there are now new possibilities to increase the yield of bioenergy. At large boilers the electricity generation can be further increased with the adoption of utility type power plant connections. Black liquor gasification promises higher electric power but requires additional investments compared to recovery boilers. How black liquor gasification will fare in our industry is not clear yet. A lot of costly development work needs to be done. Only time will tell whether higher electricity generation can overcome lower efficiency and higher installation cost.
机译:制浆造纸业面临新时代。新的环境期望已经出现。减少空气排放是不够的。纸浆和造纸厂需要最大程度地发挥生物能源潜力,并最大程度地减少电力消耗以生产绿色电力。能源效率在发电和消耗方面都得到了提高,因此最新的纸浆生产线可产生多余的电力,而不会燃烧工厂的树皮和木材残渣。减少磨机中的热量消耗已经降低了背压电源的潜力,并且越来越多的发电实际上是冷凝电力。黑液干燥固体含量越高,产生的蒸汽越多。当今的挑战是拥有完全不使用辅助燃料就能运转的纸浆和造纸厂一体化,从而从100%的生物质燃料中产生净电力过剩。 70年前,第一台Tomlinson回收锅炉开始在加拿大运行。回收技术从早期效率低下的化学回收发展到现代大型工厂。 2004年是第一台加拿大商业黑液气化炉开始运行的一年。黑液气化炉对回收锅炉提出了挑战。纸浆生产线的尺寸增加了。在最大的几行中,我们讨论了公用事业规模的回收锅炉发电量(> 100 MWe)。规模经济意味着现在有增加生物能源产量的新可能性。在大型锅炉上,通过采用实用型电厂连接可以进一步增加发电量。黑液气化有望提供更高的电力,但是与回收锅炉相比需要更多的投资。黑液气化将如何在我们的行业中发展尚不清楚。需要完成许多昂贵的开发工作。只有时间才能证明更高的发电量能否克服更低的效率和更高的安装成本。

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