OxyTech MDC cells

OxyTech Systems manufactures and licenses the MDC series of monopolar diaphragm cells (Fig. 39). The MDC cells feature woven steel wire cathode screen tubes open at both ends, which are welded into thick steel tube sheets at each end. The tubes, tube sheets, and the outer steel cathode shell form the catholyte chamber of the cell (Fig. 40). Copper is bonded, rather than welded, to the rectangular cathode shell on the two long sides parallel to the tube sheets. Copper connectors attached at the ends of the bonded copper side plates complete the encompassing of the cathode with copper. Anodes are connected to a copper patented cell base, which is protected from the anolyte by a rubber cover or a titanium base cover (TIBAC) [126], Orientation of the cathode tubes is parallel to the cell circuit, the opposite of a Hooker-type cell. This arrangement accommodates thermal expansion of the cell and circuit without changing the anode-to-cathode alignment. 

The combination of the Modified Diaphragm and expandable DSA anodes reduces power consumption by 10-15% from that of regular asbestos diaphragms and standard, fixed DSA anodes [127]. Table 12 presents performance data for the two most common MDC cell sizes [125]. The OxyTech MDC-29 is shown in Fig. 41. The licensed chlorine capacity of OxyTech cells now exceeds 20 000 t/d. 

Power consumed per ton (metric or short) of chlorine produced. 

Ihble 13. Typical brine feed specifications for diaphragm cells 

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