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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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4.5.3.1.9 工厂案例

Wet flue-gas scrubbing is widely used throughout Europe for the full range of waste types.

烟气湿法洗涤工艺广泛应用于整个欧洲的各类型废物处理工厂。

Reference literature

4.5.3.1.10 参考文献

[ 1, UBA 2001 ], [ 2, InfoMil 2002 ], [12, Achternbosch, 2002], [ 64, TWG 2003 ]

4.5.3.2 Semi-wet scrubbing systems

4.5.3.2 半干法系统

Description

4.5.3.2.1 说明

This technique is described in Section 2.5.4.

该技术在2.5.4章节描述。

Technical description

4.5.3.2.2 技术说明

The diagram below shows a typical semi-wet FGC system, with a reactor on the left and downstream deduster on the right.

下图显示了一个典型的半干法烟气净化工艺,左边是一个反应塔右边是一个下游除尘器。

Figure 4.6:Typical design of a semi-wet FGC system

Figure 4.6:半干法烟气净化系统的典型设计

Achieved environmental benefits

4.5.3.2.3 获得环境效益

There is no effluent disge from semi-wet scrubbers as the amount of water used is generally lower than with wet scrubbers and it is evaporated with the flue-gases. If of suitable quality,

other site waste water (e.g. rainwater) may be sent to the FGC system. [ 74, TWG 2004 ]

半干法反应器没有废水排放,其用水量比湿法洗涤要小,水跟随烟气蒸发了。如果水的品质合适,其他部位的废水(如:雨水)可以拿来使用。

Semi-wet FGC systems provide high removal efficiencies (for soluble acid gases). Emission levels can be decreased by adjusting the reagent dosing rate and design point of the system, but generally at the cost of increased reagent consumption and residue production rates.

半干法烟气净化系统提供较高的去除效率(针对可溶性的酸性气体)。通过调节吸收剂的添加量和系统的设计点(是不是排烟温度?看4.5.3.9.4。),排放可以污染物排放水平,但是这通常会增加吸收剂的消耗量和副产物的排放量。

Semi-wet systems are used with fabric filters to remove the reagents added and their reaction products. Reagents, other than alkaline reagents, can also be added to adsorb other flue-gas components (e.g. activated carbon for mercury and PCDD/F).

半干法系统通常使用布袋除尘器去脱除吸收剂和反应副产物。除了碱性吸收剂外,其他试剂也可以被用于吸收其烟气污染物组分(例如:将活性炭用于汞和二噁英/呋喃)。

They are most commonly used as a single-stage reactor/filter for the combined reduction of:

他们通常采用单级反应器/布袋,然后组合在一起来减少如下污染物:

•acid gases- removed by the alkaline reagent;

酸性气体—通过碱性吸收剂去除;

•dust- filtered by the fabric filter;

粉尘—被布袋除器过滤;

•PCDD/F- adsorbed if activated carbon is injected as well as alkaline reagent;

二噁英/呋喃—喷入的活性炭与碱性吸收剂一起吸附;

•Hg- adsorbed if activated carbon is injected as well as alkaline reagent.

汞—喷入的活性炭与碱性吸收剂一起吸附;

Environmental performance and operational data

4.5.3.2.4 排放性能和运行数据

The air emission levels generally achieved by plants fitted with semi-wet scrubbers are as

follows.

安装半干法工艺的焚烧厂可以达到如下排放水平。

Table 4.21: Emission levels associated with the use of semi-wet scrubbers

Table 4.21: 使用半干法工艺的排放水平


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