Gas analysis and gas flow measurement in a biogas plant BINDER GROUP. Technology, Solutions, Experience

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2 Gas aalysis ad gas flow measuremet i a biogas plat BINDER GROUP Techology, Solutios, Experiece 2

3 Eergy from Biomass ad Biogas i the Agroidustry Jakarta, 20 May 2013 Gas aalysis ad gas flow measuremet i a biogas plat Itroductio compay BINDER Thermal dispersio mass flow measuremet Typical challeges ad solutios Summary ad coclusios 3

4 Bider Group AG Fiace Holdig Bider Egieerig GmbH Sales & Service Compaies i DE / F / CH / NL / B / Sigapore, Chia BINDER GmbH Maufacturig Compay for Gas Flowmeter, Gas Aalyzer ad Cotrol Systems with followig products: COMBIMASS / VACOMASS / CAMASS INSTRUM AG Maufacturig Compay for Stailess Steel Pressure Regulators ad Valves BETA B.V. Maufacturig Compay for Pressure ad Temperature Switches

5 BINDER Gas flow measuremet 5

6 BINDER Gas aalysis 6

7 Basics of thermal dispersio techology The priciple: Gas flows by a heated sesig elemet ad causes coolig dow of the elemet by the mass flow (molecules) direct mass flow measuremet, uaffected by gas pressure ad temperature chages Measuremet is based o a PT 100, a additioal o-heated sesor is used as a referece. The amout is directly related to the mass flow. 7

8 Typical challeges i biogas applicatios Outdoor istallatio operatio for years uder the sky rai, direct su light, sow,... biogas is highly corrosive big plats log distaces betwee the measurig poits igitio potetial of methae-air-mixture the cocetratio of methae is chagig i the biogas biogas has a high percetage of water vapour (at the top of the digester 100% relative humidity) ad cotais beside others H2S ad NH3 8

9 Typical challeges ad solutios Outdoor istallatio operatio for years uder the sky rai, direct su light, sow,... biogas is highly corrosive Rugged stailess steel desig Sesors are corrosio-proof ad resistat agaist moisture ad dirt No mechaical movig parts 9

10 Typical challeges ad solutios The cocetratio of methae is chagig i the biogas (e.g. desity chages ca cause 2 3% failure) I combiatio with a gas aalyser statio the chagig gas compositio ca be corrected i the flow sigal 10

11 Typical challeges ad solutios biogas has a high percetage of water vapour (at the top of the digester 100% relative humidity) Humidity correctio by either 1. Temperature Method 2. Dew-Poit Method 11

12 Humidity Correctio 1. Temperature Method Based o temperature of the biogas ad assumig a relative humidity of 100% the water cotets ca be calculated by stadard method ca be used oly directly after the digester. Eve if a gas cooler is used to dry the gas, directly after the gas cooler the gas is 100% water damp saturated. But gas temperature must't be icreased due to blowers, direct su light etc. I these cases temperature method will calculate a wrog (too high) water damp portio. 2. Dew-Poit Method Usig a special probe, the relative humidity ad so the water cotets ca be determied. The probe is sesitive agaist H 2 S, therefore it ca be used oly after the filter at very low H 2 S-cocetratios. 12

13 Summary ad Coclusios Coditios i biogas plats request solid ad reliable desiged products for a safe ad stable operatio Thermodyamic ad Chemical properties of biogas require sophisticated measuremet & cotrol equipmet Combiatio of gas flow ad gas aalyser esures a efficiet, reliable ad profitable operatio of the biogas plat 13

14 Questios / Remarks? We are happy to receive your feedback, questios ad remarks. Ja Talkeberger Maager Iteratioal Sales ja.talkeberger@bidergroup.ifo Bider GmbH Buchbrueweg Ulm, Germay Eddy Eg Maager South East Asia bider.egrg@pacific.et.sg Bider Istrumetatio Pte. Ltd 25 Iteratioal Busiess Park, # Germa Cetre Sigapore

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