Technical manual 2G-TA 04 - Gas Combined Heat and Power Plants of 2G-Biogas, 2G-Natural gas and 2G-agenitor Series G-Box 50 2G-KWK-EG 2G-KWK-BGG 2G-agenitor G-BOX 50 2G-KWK-70EG 2G-KWK-100EG 2G-KWK-140EG 2G-KWK-200EG 2G-KWK-240EG 2G-KWK-250EG 2G-KWK-370EG 2G-KWK-400EG 2G-KWK-50BGG 2G-KWK-64BGG 2G-KWK-100BGG 2G-KWK-120BGG 2G-KWK-190BGG 2G-KWK-250BGG 2G-KWK-370BGG agenitor 206 agenitor 208 agenitor 212 agenitor 306 agenitor 312 agenitor 412 2G Energietechnik GmbH
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Contents 1 Purpose... 5 2 Safety information... 5 3 Effects of condensate in the propellant... 6 4 Preventing malfunctions caused by condensate in the propellant... 6 5 Minimum requirements with regard to gas quality... 7 5.1 General preconditions... 8 6 Changed limit values with the use of a catalytic converter... 8 2G-TA 04 Gas (engl.) 12.07.2011 Edition: 1.1 3 of 8
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1 Purpose This technical manual describes propellant properties required to operate a 2G Energietechnik combined heat and power plant. 2G Energietechnik products are to be fuelled only with gases which are not flammable in the state in which they exist outside of the motor (interface mixer connection). If necessary, additional plant specific measures must be taken in accordance with all applicable regulations (e.g. monitoring / regulation of oxygen concentrations in the gas emergency shut-down). For an intentional standstill of the plant (e.g. for repairs, maintenance and emergencies), a manual shut-off device outside the machine room must be provided, at best at the point where the gas line enters the machine room. The manual shut-off device is to be installed so that it cannot be operated by an unauthorised person. This applies especially so that the device cannot be moved to the open position from the locked position. It is the responsibility of the operating company to equip the fuel gas system with the required devices, to ensure that there are no leaks in the system and to ensure that all applicable regulations are fulfilled. 2 Safety information Malfunctions arising from a build-up of condensate in the available propellants are not covered under the guarantee. This is not the case if the scope of delivery contractually agreed with 2G Energietechnik expressly includes a gas dryer. Evaporated accompanying substances (which only occur in liquid form under certain circumstances) do not as a rule damage the motors. (This of course does not apply to gas components such as halogen and sulphur compounds, etc. which are known to cause damage.) As a matter of experience, malfunctions caused by inadequately dry gas usually occur outside of the actual motor in fittings, devices and piping. These malfunctions must be taken seriously. To ignore them can lead to serious motor malfunctions sooner or later. 2G-TA 04 Gas (engl.) 12.07.2011 Edition: 1.1 5 of 8
3 Effects of condensate in the propellant Properties of the condensate: Acidic water and gas compressor cylinder oil form an emulsion Corrosion ( wear) TAN enrichment or ph reduction in the oil Carbon deposits on the: valves, piston ring grooves and slits 4 Preventing malfunctions caused by condensate in the propellant Preventing vapor formation by cooling and/or releasing. Mechanical separation (e.g. with the use of a cyclone or separator filter) and siphoning off of the condensate. The gas line to the motor is to be designed so that the gas does not cool further and is effectively not further decompressed by resistance or downstream pressure reducer. (If necessary, isolate the propellant line or equip it with an auxiliary heating element). Because, despite the absence of condensate build-up, a certain amount of condensate can still get into the motor, it is important that the condensate is largely free of acidifiers. To be certain, the ph value of the water extract collected by the condensate separators must be checked. The stronger the acid, the more damaging it can be, even with hardly detectable amounts of condensate, which can nevertheless get into the motor with the gas. 6 of 8 2G Energietechnik GmbH
Technical Manual 2G-TA 09 - Gas Changed limit values with the use of a catalytic converter 5 Minimum requirements with regard to gas quality Parameter Identifier Limit value Unit Notes: Methane number MN > 80 Low methane number after consultation with 2G Energietechnik Heating value H u,n > 5 kwh / Nm³ Chlorine content Cl < 80 mg / Nm³ CH4 Chlorine occurs as a volatile compound Fluoride content F < 40 mg / Nm³ CH4 Fluoride occurs as a volatile compound Overall Chlorine-fluoride Dust content < 5 µm (Cl, F) < 80 mg / Nm³ CH4 < 10 mg / Nm³ CH4 Oil vapour < 400 mg / Nm³ CH4 There may be no condensation in the intake tract Solvent in the combustion air VOC < 25 mg / Nm³ CH4 Consult with 2G Energietechnik if concentrations are higher Silicon content Si < 2 mg / Nm³ CH4 Consult with 2G Energietechnik if silicon concentrations are higher Total sulphur content Hydrogen sulphide content S < 200 mg / Nm³ Total sulphur includes hydrogen sulphide H 2 S < 150 / 228 ppm/ mg / Nm³ Ammonia content NH 3 < 40 / < 30 ppm/ mg / Nm³ CH4 Consult with 2G Energietechnik if concentrations are higher Relative humidity φ < 60 % There may be no condensation in the intake tract Temperature of the gas mix in accordance with gas / air mixer T G 10< T G < 30 C 2G-TA 04 Gas (engl.) 12.07.2011 Edition: 1.1 7 of 8
5.1 General preconditions Parameter Limit value Unit Notes: Gas pressure, max. fluctuation speed 1 mbar / 2sec Hu fluctuation speed 1 % / 30 sec. 6 Changed limit values with the use of a catalytic converter The use of a catalytic converter intensifies the limit values as follows: (Data not listed in the table below remain unchanged) Parameter/ catalyst poison Identifier Limit value Unit Hydrogen sulphide content H 2 S < 5 ppm Sulphur content S < 5 mg / Nm³ Ammonia content NH³ < 40 / < 30 ppm/ mg / Nm³ Arsenic content As < 1 µg / Nm³ Mercury content Hg < 1 µg / Nm³ Lead content Pb < 2 µg / Nm³ Cadmium content Cd < 10 µg / Nm³ Zinc content Zn < 100 µg / Nm³ Phosphorous compounds and halogens < 5 mg / Nm³ Silicon content < 0 µg / Nm³ Silicon content Si < 0 µg / Nm³ Sodium content Na < 10 µg / Nm³ Calcium content Ca < 10 µg / Nm³ Bismuth content Bi < 1 µg / Nm³ Manganese content Mn < 10 µg / Nm³ Potassium content K < 10 µg / Nm³ Antimony content Sb < 1 µg / Nm³ Chlorine content Cl < 10 µg / Nm³ Iron content Fe < 10 µg / Nm³ Notes: 8 of 8 2G Energietechnik GmbH