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Mono-polar Electrolyzer (CME)

About Mono-polar Electrolyzer (CME)

fig 2
Structure of CMENew Window

The most popular IEM that we use in Japan is the CME electrolyzer. CME is a monopolar electrolyzer for mercury process that was started in use from 1974. It fulfills all needs such as building a new plant and transformation, and addition of diaphragm facilities.

As shown in Figure 2, the anode element (made of Ti) and cathode element (made of Ni or SUS310S) are placed alternately between the ion exchange membrane. The filter press structure is bonded with tierod and the supply/drain power is supplied by the under cell bus bar installed under the electrolyzer.

Feature 1: Natural Circulation System of Electrolyte (Self-Circulation)

fig 3: Natural Circulation System of Electrolyte (Self-Circulation)

You must strictly control the temperature and density of electrolyte in each anode/cathode element to maintain high electrolysis performance for a long period with the ion exchange membrane method electrolyzer. As shown in Figure 3, the electrolyte is naturally circulated because of relative density difference generated between the electrolyte inside and mixture of electrolyte and gas outside when you use a pail type supply/drain power material (Current Distributor) in the anode/cathode. Temperature and density are equalized by this natural circulation system and quickly discharge gas from the electrolysis surface.

Feature 2: Advanced Bus Bar Arrangment

You must strictly control the temperature and density of electrolyte in each anode/cathode element to maintain high electrolysis performance for a long period with the ion exchange membrane method electrolyzer. As shown in Figure 3, the electrolyte is naturally circulated because of relative density difference generated between the electrolyte inside and mixture of electrolyte and gas outside when you use a pail type supply/drain power material (Current Distributor) in the anode/cathode. Temperature and density are equalized by this natural circulation system and quickly discharge gas from the electrolysis surface.

fig 4: Uniform Current Distribution

Feature 3: Overflow Mode of Electrolyte from Element

fig 5: Overflow Mode of Electorlyte from Element

The gas-liquid blending electrolyte is isolated in the chamber above the element and overflowed from the nozzle (Figure 5). he ion exchange membrane does not directly come in contact with hydrogen gas or chlorine gas when you use this system. A ripple current can be avoided when gas-liquid blending electrolyte is discharged, and no unnecessary vibration or outside pressure is transmitted to the delicated ion exchange membrane with this system.

Feature 4: The Operation Status is Easily Monitored (Visible Flow)

fig 6: The Operation Status is Easily Monitored (Visible Flow)

Electrolytes overflow from the anode/cathode element above the electrolyzer and flows through a semi-transparent teflon tube (Figure 6) and is collected in the manifold. By examining the overflow condition and color change of the electrolyte, you can quickly discover any trouble such as pinhole in the ion exchange membrane and therefore operate the facility safely.

Feature 5: Natural Circulation System of Electrolyte (Self-Circulation)

Users do not want to use expensive and delicate ion exchange membranes for a long period of time. We have achieved a long-run non-stop operation record that other competitive CME cannot achieve. All long-run operation records by each ion exchange membrane maker are achieved using CME.

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