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《垃圾焚烧厂最佳可用技术参考文件》2018年版 4.5章 第一部分(待续) 学习笔记(一)

2020-02-12 11:30来源:无锡华星东方电力环保关键词:烟气净化工艺除尘技术华星东方收藏点赞

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Furthermore, the use of two different systems for the removal of solids from the flue-gas enables the separation of fly ash from the FGC residues (salts from acid gas neutralisation). This may then allow the recovery of one or other fraction where suitable outlets exist.

此外,使用二种不同的除尘系统可以将烟气固体颗粒物中的飞灰和脱酸副产物(主要是中和烟气酸性物质后得到的盐类)实现分离。这可以使得对飞灰或副产物进行有效回收得以实现。

Environmental performance and operational data

4.5.2.2.4 排放性能和运行数据

Generally, similar dust emission levels can be achieved with upstream and downstream dedusting.

一般来说,上游除尘和下游除尘可达到同等的粉尘排放水平。

In the case of double dedusting, further reductions of emissions to air beyond that already achieved by other FGC components are as shown in the table below.

如果使用双除尘技术,粉尘的减排能力将比其他烟气净化系统工艺段更好,正如下表所示。

Table 4.14: Emission levels associated with the use of BF flue-gas polishing systems

Table 4.14: 使用布袋除尘作为抛光系统(末端布置)的排放水平

Careful maintenance of bag filters is very important to ensure their effective operation and hence low emissions. The pressure across the bags is monitored in order to maintain a cake on the filter. It can also be used as a means to detect bag damage (such as irreversible fouling). Dust emissions can usually be controlled to a very low level, simply by observing the pressure more closely and adopting stricter criteria (i.e. less latitude allowed before maintenance action is taken) for bag replacement. Analysis of the filter media may also be used to assess the reagent dose rate required and to assess its condition and its remaining lifetime.

仔细对布袋除尘器进行维护对确保其运行效率和较低的排放水平是非常重要的。对布袋压差的监控是为了维持滤袋的滤饼层。这也是监测布袋是否损坏的一个方法(例如:糊袋),粉尘排放通常可以被控制在一个非常低的水平,只要密切关注压差和采用严格的换袋标准(在维护之前应当严格遵守)。滤料的化验分析可以用于评估吸收剂的给料率,评估其状况和剩余寿命。

Table 4.15: Operational data associated with the use of flue-gas polishing

Table 4.15: 与使用末端布置除尘相关的运行数据

Cross-media effects

4.5.2.2.5 跨介质影响(增加的能源消耗或其他影响)

The cross-media effects associated with double dedusting are identified in the following table.

下表列出了与双重除尘相关的跨介质效应。

Table 4.16: Cross-media effects associated with the use of additional flue-gas polishing

Table 4.16: 使用末端布置除尘在不同介质下的影响

For this technique, the most significant cross-media effect is the consumption of energy due to the pressure across the bag filters.

对于这个技术,最显著的跨介质影响(能源消耗)来自于布袋除尘器压降造成的能源消耗。


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