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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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•lowest reagent consumption rates;

最低的吸收剂消耗率;

•lowest solid residue production rates;

最低的固体副产物排放率;

•higher water consumption;

最高的水耗;

•production of an effluent that requires management;

有废水产生,需要进行处理;

•increased plume visibility;

增加了烟羽的可视性;

•PCDD/F build-up (memory effect) on scrubber plastic components requires addressing;

二噁英/呋喃,在吸收塔内塑料部件上的积累(记忆效应)需要处理;(这个addressing有处理的意思,但这里是不是这个意思?)

•if the input temperature is too high the material used in the wet scrubber may be destroyed.

如果进入洗涤塔的烟气温度过高,可能塔内材料会遭到损坏。

[74, TWG 2004 ]

Technical considerations relevant to applicability

4.5.3.1.6 技术适用性的考虑

The technique is generally applicable as long as there is a sufficient water supply.

只要当地不缺水,该技术通常是普遍适用的。

Due to the low outlet temperature (approximately 70 °C), the flue-gas may need to be reheated for subsequent FGC systems, e.g. bag filters and SCR.

由于出口排烟温度低(大约在70度,国内如果脱白会更低),考虑到下游烟气净化系统,如:布袋除尘和SCR系统,烟气需要进行在加热。

Economics

4.5.3.1.7 经济因素

Estimated capital costs for the technique are as in the table below.

该技术的投资成本估算如下表所示。

Table 4.20: Estimated investment costs of ed components of wet FGC systems

Table 4.20: 湿法烟气净化系统的部件投资成本估算

The key cost aspects of this technique compared to the alternatives are:

与可替代的工艺相比这个技术的关键成本是:

•higher capital investment costs than other systems, mainly due to the effluent treatment plant and the higher number of process units required, which may be a limiting factor in particular at smaller non-hazardous waste incineration sites;

比其他系统更高的投资成本,是否废水处理装置和采用多少段(我理解为2段塔,3段塔或4段塔)工艺单元是影响成本的关键,也是小规模无害化垃圾焚烧场所无法使用的原因;

•operational costs associated with disposal of residues may be lower, due to the lower specific residue production [ 74, TWG 2004 ];

由于副产物外排量较低,处置副产物的运行成本较低;

•labour costs are higher due to the increased complexity of the system.

由于系统更为复杂,所以劳动力成本更高。

Driving force for implementation

4.5.3.1.8 实施动力(该技术的优势)

•Achievement of particularly low and stable acid gas emission levels.

实现特别低且稳定的酸性气体排放控制水平。

•Reduction of disposal costs for flue-gas treatment residues.

减少烟气净化系统副产物的处置成本。

•Possibility to recover HCl, salt, gypsum.

可以实现HCL,盐类和石膏的回收。

•Particularly difficult to predict/control input waste composition.

特别难预测和控制的废弃物组成。(个人理解为垃圾成分不确定,烟气系统要面对的就是污染物的波动和高入口浓度,湿法是最佳处理方案,国内浙江,特别是温州这个区域经常会有这个需求)。

•Input waste may contain high and variable loads of acid gas precursors or metals (e.g. ionic mercury) [ 74, TWG 2004 ].

输入废弃物可以适应浓度较高且波动较大的酸性气体的前驱物或金属(如:离子汞)。

•Reduction of ammonia emissions.

减少氨逃逸。

Example plants


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