Dekati Ltd Technical Note

DEKATI® PM10 IMPACTOR FOR IS

Dekati Ltd. Osuusmyllynkatu 13 FIN-33700 Tampere Finland Author: HEI, Dekati Ltd. Date: 27.04.2010 Keywords: Dekati

® PM10 Impactor, ISO23210 standard

Modified: 03.05.2010

ISO 23210 description

The ISO standard 23210:2009 defines a standard reference method for simultaneous measurement of PM10 and PM2.5 from stationary emission standards about particle collection on a filter, but instead of a filter an impactor unit is used to collect size classified particles on filters. The method is aimed for lowdefined as 30 minute averages in standard conditions of 273K, 1013hPa and dry gas. The measurement method can be used in the stack gas measurements of any industry such as combustion, cement or steel production as long as the requirements for the stack gas conditions and PM are fulfilled. The standard may not be used in conditions where the stack gas is saturated with water vapor or when there is a significant fraction of particles above 10for the determination of total mass concentration of the dust.

A cascade impactor is used to enable the simultaneous measurement of PM10 and PM2.5. requirements for the impactor are set so that the measurement results with ancomparable. The collection efficiency curves of the impactor stages must agree as specified with the ISO 7708:1995 standard. The particulate matter is collected on quartz filters which are weighed before and after the PM collection to find the amount of collected PM in each size fraction.

The Dekati® PM10 fulfills all requirements set in the standard for the

impactor and can therefore be used to make measurements according to ISO23210.stainless steel and is therefore measurement conditions. The system can also be upgraded with an additional PM1 impactor stage which enables measurement of PM1 size fraction.

Figure 1. Dekati® PM10 Impactor.

PM10 IMPACTOR FOR ISO23210 MEASUREMENTS

Tel: +358 3357 8100 Fax: +358 3357 8140 support@dekati.fi www.dekati.fi

PM10 Impactor, ISO23210 standard

defines a standard reference method for simultaneous measurement of PM10 and PM2.5 from stationary emission sources with a two-stage impactor. The method is similar to standards about particle collection on a filter, but instead of a filter an impactor unit is used to collect size

The method is aimed for low-concentration measurements below 40mg/mdefined as 30 minute averages in standard conditions of 273K, 1013hPa and dry gas. The measurement method can be used in the stack gas measurements of any industry such as combustion, cement or steel

uirements for the stack gas conditions and PM are fulfilled. The standard may not be used in conditions where the stack gas is saturated with water vapor or when there is a significant fraction of particles above 10µm. A further limitation of the standard is that it may not be used for the determination of total mass concentration of the dust.

A cascade impactor is used to enable the simultaneous measurement of PM10 and PM2.5. requirements for the impactor are set so that the measurement results with any two systems are comparable. The collection efficiency curves of the impactor stages must agree as specified with the ISO

The particulate matter is collected on quartz filters which are weighed before and d the amount of collected PM in each size fraction.

all requirements set in the standard for the impactor and can therefore be used to make standard PM10 and PM2.5 measurements according to ISO23210. The impactor is made of

nless steel and is therefore a robust solution even for harsh measurement conditions. The system can also be upgraded with an

PM1 impactor stage which enables measurement of PM1 size

O23210 MEASUREMENTS

defines a standard reference method for simultaneous measurement of The method is similar to

standards about particle collection on a filter, but instead of a filter an impactor unit is used to collect size measurements below 40mg/m

3

defined as 30 minute averages in standard conditions of 273K, 1013hPa and dry gas. The measurement method can be used in the stack gas measurements of any industry such as combustion, cement or steel

uirements for the stack gas conditions and PM are fulfilled. The standard may not be used in conditions where the stack gas is saturated with water vapor or when there is a

is that it may not be used

A cascade impactor is used to enable the simultaneous measurement of PM10 and PM2.5. The y two systems are

comparable. The collection efficiency curves of the impactor stages must agree as specified with the ISO The particulate matter is collected on quartz filters which are weighed before and

Dekati PM10 Impactor setup according to ISO23210

The ISO23210 standard recommends that the impactor is placed inside the stack directly against the flue gas flow. Goose-neck and out-stack sampling is allowed only if extensive loss analysis is made, and the deposited material is carefully retrieved from the probe. The impactor must be operated at the specified flow rate and the sample must be taken isokinetically from the flue gas. The recommended setup is shown in Figure 2.

Figure 2. Recommended measurement setup according to ISO23210.

In practice, most impactor users will probably prefer the option of placing the impactor outside the stack. In this case, the Dekati

® PM10 impactor will be heated up to the sample temperature, the setup is shown

in Figure 3.

Figure 3. PM10 and PM2.5 measurement setup with the heated. impactor placed outside the stack.

Dekati can provide complete setups for both in-stack and out-stack measurements. The difference between the setups is that the out-stack setup also includes the impactor heater and its temperature controller. More detailed descriptions on the different setup options can be found in the next page. Impactor unit is also available without accessories to be used with already existing sampling pumps, isokinetic sampling heads and heating mattes.

1. Isokinetic nozzle 2. Two-stage impactor 3. Suction tube 4. Drying column 5. Manometer 6. Pump 7. Flow meter 8. Gas volume measurement device with thermometer 9. Temperature measurement device 10. Pitot tube with differential pressure meter

Everything heated after the stack – no cold spots!

Everything heated after the stack – no cold spots!

Connection

Nozzle from the SAC-100 set

Impactor heating jacket around the impactor

Stainless steel connection IA-322

PM10 Impactor

Stack – Flow direction

PMP-400/PMP-350 Pump

© Dekati Ltd. - Technical Note - 3 -

Complete Dekati® PM10 impactor setup for in-stack measurement The following items are needed for an in-stack measurement set-up:

• Dekati®

PM10 impactor unit

• Pump with flow control (PMP-350/PMP-400, other pumps may also be used)

• Collection substrates (25mm) for the impactor stages

• 47mm filters for the back-up filter stage

• Stainless steel connection hose between the impactor and the pump

� For decreasing gas temperature before pump and flow control devices

• Isokinetic sampling nozzles. The nozzle size needs to be selected so that the flow velocity inside the stack is equal to the flow velocity inside the nozzle. The calculation can be made using the impactor calculation sheet provided with the PM10 Impactor.

Complete Dekati® PM10 impactor setup for out-stack measurement The following items are needed for an out-stack measurement set-up:

• Dekati®

PM10 impactor unit

• Pump with flow control (PMP-350/PMP-400, other pumps may also be used)

• Collection substrates (25mm) for the impactor stages

• 47mm filters for the back-up filter stage

• PM10 impactor heating jacket and temperature controller unit for the heating jacket.

• Stainless steel connection hose between the impactor and the pump

� For decreasing gas temperature before pump and flow control devices

• Isokinetic sampling nozzles. The nozzle size needs to be selected so that the flow velocity inside the stack is equal to the flow velocity inside the nozzle. The calculation can be made using the impactor calculation sheet provided with the PM10 Impactor.

• Connection set to connect the nozzle into the impactor.

� Depending on the physical dimensions of the flue duct and the sampling site, different connector sets may be needed. Several options are available, please contact Dekati for details.

© Dekati Ltd. - Technical Note - 4 -

Dekati® PM10 impactor specifications (PMS-510) Measurement

Nominal air flow 10lpm

Particle size range 0−10µm Number of channels 3 (>10 µm, 10-2.5 µm, <2.5 µm). PM1 stage available. Operation conditions

Ambient temperature 0-200°C with high temperature bolts (incl.) Sample temperature 0-200°C with high temperature bolts (incl.) Accessories available for heating up the impactor to 400°C Dimensions and materials

Weight 2.4kg Dimensions Ø65 x H150 (mm) Inlet NW16 flange Outlet R 3/8 (NW16 flange) Impactor material Stainless steel

For more information, please contact Dekati Ltd.