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BM2.7 11 The BM2.7 single-element series: Major energy savings from zero-gap technology Nearly 30 years after the Uhde® single-element membrane cell was first marketed, the highly successful BM2.7 series is now in its sixth generation. However, cells from every generation are compatible, having an identical active area of 2.72 m2. From the BM2.7v3 in 1997, the first laser- welded cell where internals on the anode side allowed acidified operation, to the BM2.7v6 launched in 2012, the first full zero-gap cell featuring a flexible elastic element in the proven BM2.7 single-element design, the BM2.7 series has set new standards in chlor-alkali electrolysis. The current 6th generation reduces power consumption to 2,020–2,035kWh per metric ton of NaOH at 6kA/m2. Single-element + elastic element = zero gap The defining feature of the BM2.7v6 is a zero gap over the entire active membrane area. This is achieved by combining an Uhde® single-element with an elastic element. With the woven mesh cathode design and a state-of-the-art coating, high resistance to reverse pressure and pressure upsets is also ensured. The combination of the single and elastic elements brings key benefits. Key benefits of the BM2.7 single-element series - Energy savings: Much lower energy consumption thanks to increased utilizable area of membrane combined with full zero-gap design - Enhanced energy efficiency: More uniform current distribution to membrane and better release of gas bubbles to reduce any possible stagnation of gas transport inside cell - No leaks: 100% leakproof cell throughout service life due to single-element design with unique sealing and hose system - Contact pressure independently controlled: Direct control of pressure applied to elastic elements and thus to membranes irrespective of torque forces applied on bolts of flanges for the sealing system - Extended membrane service life: Membranes run in optimal contact window to ensure zero gap across full active area and increase membrane service lifePDF Image | Chlor-Alkali Electrolysis
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