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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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Table 4.30: Emission levels associated with the use of intermediate systems

Table 4.30: 使用中间系统的排放水平

Cross-media effects

4.5.3.5.5 跨介质影响(增加的能源消耗或其他影响)

This technique enables the reduction of the amount of solid residues produced, as it is lower than without recirculation.

该技术可以减少固体副产物的产生量,它比没有物料循环的排放量要低。

The reported reagent stoichiometry is in the range 1.5–2.5 depending on the implemented technology. A better stoichiometric ratio is achieved with low-pressure steam than with water addition or maturation.

据报告称该技术的吸收剂的化学计量比(钙酸比,钠酸比)范围在1.5-2.5,具体取决于所采用的技术(是指基于干法的物料循环,还是半干法的物料循环,个人理解半干法的物料循环化学计量比肯定更低)。通过加入低压蒸汽会获得比加水或熟化更好的化学计量比。

Water/low-pressure steam consumption depends on the inlet flue-gas temperature.

水/低压蒸汽的消耗量取决于入口的烟气温度。

Plume visibility is very low due to the minimal amount of water/low-pressure steam used for conditioning.

由于用于调节的水/低压蒸汽量最小,烟羽的可见度非常低。

In some cases, increases in mercury releases have been reported. Consideration of the mercury input rates and the provision of sufficient mecury removal may therefore be required to control this.

在有些案例中,有报告称采用物料循环后汞的排放量有所升高。因此需要控制和考虑汞的入口浓度和提供足够的汞的脱除能力。

Technical considerations relevant to applicability

4.5.3.5.6 技术适用性的考虑

The technique is generally applicable in combination with FGC systems other than wet systems.

该技术通常可应用于除湿法系统以外的其他烟气净化系统(如:干法,半干法)。

The recirculation of FGC residues requires a larger bag filter and additional space to accommodate the recirculation/reactivation/maturation equipment.

烟气净化系统物料再循环工艺需要一个选型较大的布袋除尘器和额外的空间来容纳再循环/再活化/熟化等设备。(活化设备是个啥?阿尔斯通的增湿活化器?有可能)

Economics

4.5.3.5.7 经济因素

Capital costs are reported to be somewhat lower than for wet and semi-wet systems due to the

reduced number of process components and consequently the smaller footprint, but slightly higher than for dry FGC without recirculation.

报告称,投资成本低于湿法和半干法系统,因为减少了工艺设备,因此占地面积也减少,但是投资比没有物料循环系统的干法烟气净化系统要稍微高些。

Operating costs, compared with dry FGC without recirculation, are reduced by the lower reagent consumption (improved stoichiometric ratio compared with dry systems) and the reduced residue disposal costs.

运行成本与没有物料循环系统的干法系统相比则更低,因为吸收剂消耗量减少(与干法系统相比改进了化学计量比,更低)和副产物处置成本降低。

Driving force for implementation

4.5.3.5.8 实施动力(该技术的优势)

• Reduction of reagent consumption.

吸收剂消耗量减少。

• Reduction of residue production.

副产物产量减少。

• Limited space requirements.

需要的占地共空间较少。

• Limited process complexity.

工艺复杂程度相对较低。(对于物料循环干法工艺而言我不认为负责程度低。)

Example plants

4.5.3.5.9 工厂案例

Existing plants incinerating MSW, RDF and wood wastes in France, the UK, Italy, Sweden, Norway, Germany, Denmark and Spain.

在法国,英国,意大利,瑞典,挪威,德国,丹麦,西班牙的现有生活垃圾,RDF(垃圾衍生燃料)和木材废料焚烧厂。

Reference literature

4.5.3.5.10 参考文献

[ 57, Alstom 2003 ], [ 64, TWG 2003 ], [7, TWG 2017]-CEWEP-ESWET

4.5.3.6 Direct addition of alkaline reagents to the waste (direct desulphurisation)

4.5.3.6 垃圾直接添碱工艺(直接脱硫工艺,流化床)

Description

4.5.3.6.1 说明

This technique is described in Section 2.5.4.4. It is generally only applied to fluidised bed furnaces.

该技术在2.5.4.4章节中描述。它通常适用于流化床焚烧炉。

The alkaline reagent reacts in the furnace with acid gases to reduce the acid loads in the raw flue-gas passing to subsequent flue-gas cleaning stages.

碱性吸收剂在熔炉里面和酸性气体反应,减少了烟气下游烟气净化段中原烟气的酸性负荷。(即减少了原烟气中的原始排放浓度)


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