新的Valmet技术净化牛皮纸纸浆中的甲醇

来自Valmet的新型甲醇技术的化石自由纸浆厂

Fossil-free mills with lower NOx emissions

Purified methanol from pulp mills is a renewable, high-quality fuel. It is produced naturally from the incoming wood and can be used instead of oil. Better use of it can therefore help pulp mills to reduce their use of fossil fuels.

随着Valmet的甲醇净化技术生产的甲醇作为磨机中许多地区的初创和支持燃料。它具有均匀的质量,可以更好地控制火焰。并且火焰控制在许多应用中都很重要,特别是实现石灰窑的可靠运行。

Purified methanol has other benefits as well. Since most of the nitrogen is removed, fuel NOx is practically eliminated and emissions of NOx are lower.

现有的甲醇植物可以升级

The Valmet methanol purification technology is designed as an upgrade to existing methanol plants. The first step in the upgrade is to install a low-NOx module upstream from the methanol plant. The low-NOx module mainly removes nitrogen and water from the stripper off gas.

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A methanol plant with upgrade for production of purified methanol

用低NOX模块到位,甲醇植物产生纯化的甲醇。这种甲醇在气味中低,可以容易地处理并储存在磨机中。

用于二氧化氯生产的甲醇

Methanol for production of chlorine dioxide has to be free from compounds like ethanol and acetone. These compounds can be removed with a distillation technology similar to the one used in traditional methanol plants.

If the upgraded methanol plant is further upgraded with two distillation columns, the flow of purified methanol becomes one flow of distilled methanol and one flow of purified methanol. The distilled methanol is extremely pure and can be used in several processes that require the methanol to be of very high quality.

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在现有的甲醇厂之前和之后升级的甲醇植物。在甲醇植物去除氮气之前的低NOx纯化,而甲醇植物后的两个蒸馏塔产生一流的蒸馏甲醇和一流的纯化甲醇。

降低化石燃料的使用,也可能降低化学品成本

Using purified methanol can help the mill to reduce the use of fossil fuels and could also help to lower emissions of NOx. But there are also other mill processes where methanol can be used.

一个例子是生产二氧化氯,普通漂白化学品。一些生产二氧化氯的一些最重要的技术使用甲醇作为还原剂。使用本地生产的甲醇可以显着降低磨机的进口甲醇的成本。

Chemical consumption and sulfur recovery

The Valmet methanol purification process uses sulfuric acid to convert ammonium into ammonium salts and promote separation of sulfur components. The extracted oil (red oil) contains sulfur and can be incinerated in the recovery boiler. The cost of chemicals is very low compared to the financial benefits of locally produced methanol.

小足迹,投资水平有吸引力

Valmet甲醇净化技术具有小的占地面积,并且可以安装在相对有限的空间内。Valmet甲醇纯化使得可以在非常有吸引力的投资水平上升级现有的甲醇植物。

Unleashing the green value of methanol

甲醇是一种具有巨大潜力的纸浆磨坊副产物。它更好的使用可能有助于纸浆轧机降低燃料成本,降低碳足迹并增加生产。