Filter systems and flue gas cleaning

	There are two ways to filter the exhaust gas. On the one hand there is the wet and dry washing technology and on the other hand the electrostatic filter technology. For our systems we mainly use the dry washing technology. For our dry washing technology we can offer ceramic filters and fabric filters. We prefer ceramic filters for our furnaces up to 400 kg/h, as these have a very high filter efficiency on the one hand and a very long service life on the other. Which of these both filter technologies is suitable is mainly a question of the amount of exhaust gas and the media itself. The filter units are of modular design. Several modules can thus form a filter system. By default, these are made up of 1-2-3 and 4 modules and so on. The design of a plant is based on its operating data.
	For our dry-washing systems we additionally recommend to use a dry-scrubbing-solvent injection system. These dry scrubbing systems are used to remove corrosive and toxic gases (for example SO2 and HCl) from the exhaust gas. They are very effective with low investment and operating costs. The temperature range for the dry-scrubbing solvent should be from 170°C up to 300°C. In this range the dry-scrubbing solvent can transfer the contents. Flue gas mixed with dry-scrubbing solvent create a layer on outside surface of the filter and accumulate during operation. The dust layer causes a pressure drop and a differential pressure measurement indicate necessary cleaning steps.
	At a certain differential pressure level the filter will be cleaned by pressure air with a reverse jet cleaning system which clean the filter by a jet impulse and the dust layer on the outside surface of the filter will fall down. At the bottom of the filter the ash feed by a rotary valve to a big bag or ash container. The insulation at the outside of filter body keeps it from corrosion, during shut down periods. The dust inside is contaminated with sulpher and other components. If the temperature falls below the dew point, corrosion could be happen. Therfor a standstill heater is additionally recommended to protect the housing from corrosion. This heater is only an option, because if it is necessary depends allways only on local conditions. The filter can easily removed when necessary. It can be replaced by operation staff after training.
Requirements on the filter technology	Flue gas emission limits as per EN2000/76/EU directive ANNEX V AIR EMISSION LIMIT VALUES
Download	Flue gas emission limits as per EN2000_76_EU directive.pdf
	Please note that each system requires an individual configuration. Therefore, examples cannot be used for planning purposes, but only serve as rough information. We always calculate your system individually according to your specifications and requirements.

An example filter system for a first impression

Flue gas from combustion process

Please see our example of a combustion furnace

Flue gas from flue gas cooler

Flue gas filter

Reference emissions

Particulate

< 3 mg/Nm³

HCl

< 10 mg/Nm³

SO2

< 50 mg/Nm³

< 1 mg/Nm³

NOx

< 200 mg/Nm³

Heavy Metals

< 0,5 mg/Nm³

Dioxins

< 0,5 ng/Nm³

TYPE SICF 200-S – SICF 1000-S

(Non-binding, depending on the final configuration)

Plant type	SICF 200-S	SICF 300-S	SICF 400-S	SICF 500-S	SICF 600-S	SICF 800-S	SICF 1000-S
Total filter area	65,5	97,4	131,0	163,0	194,9	261,3	325,8	[m²]
Flue gas	1510	2264	3019	3774	4529	6039	7548	[m³/h wet]
Compressed air requirement	3,1	4,7	6,3	7,8	9,4	12,5	15,6	[m³N DL/h]
Number of candles	392	588	784	980	1176	1568	1764	[pcs]
Number of modules	2	3	4	5	6	8	8	[pcs]
Conveying air
Pressure	18000	18000	18000	18000	18000	18000	18000	[Pa]
Side channel blower	2SD 720 – 50/3,00	SD 80 – 50/5,50	2SD 820 – 50/8,50	SD 9 – 50/13,50	1SD 910 – 50/18,5	2SD 920 – 50/16,50	2SD 920 – 50/16,50	[Type]
Pressure max.	20000	20000	28000	28000	29000	35000	35000	[Pa]
Volume flow rate max.	318	318	534	534	660	1050	1050	[Nm³/h]
Fan Motor power	3,00	5,50	8,50	13,50	18,50	16,50	16,50	[kW]

More informations

Technical data in detail	As an example for the: Als ein Beispiel fuer die:	SLUDGE AND SOLID INCINERATION SCHLAMM- UND FESTSTOFFVERBRENNUNG
Overview of all SICF plants (200 - 1000 kg/h)	- SICF 200 (200 kg/h) - SICF 300 (300 kg/h) - SICF 400 (400 kg/h)	- SICF 500 (500 kg/h) - SICF 600 (600 kg/h) - SICF 800 (800 kg/h) - SICF 1000 (1000 kg/h)

	Subject to change. Sample data only. Changes to individual parameters can affect all values!

A useful guide to tendering
International tender specification template.pdf (759.74KB)

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Filter systems and flue gas cleaning

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