Justification
- Namibia is the largest producer and exporter of raw salt in Sub-Saharan Africa.
- SADC annually imports 81,213 tonnes of caustic soda from China and India.
- Increased demand for chlorine and caustic soda products, post-pandemic era.
Scope
Nuberg Engineering Limited is the appointed EPC (Engineering, procurement and
construction) firm. Calculus Industries and Nuberg have established and fostered a strong
relationship since 2017. A process design criteria session was held in Nuberg’s Delhi
offices, in December 2018. During this session, Calculus provided the desired product suite
and quantities, as per market opportunity. After various iterations and considering
equipment sizing, processes design criteria were attained and approved. The plant design
criteria are as per table 1.
Table 1. Primary design capacity.
| Ex-Electrolyser | Design capacity |
| Caustic Soda (as 32 % NaOH) | 156.25 TPD |
| Chlorine on Dry Basis (as 100 % Cl2) | 44.31 TPD |
| Hydrogen on Dry Basis (as 100 % H2) | 1.26 TPD |
| Hydrochloric Acid Plant Capacity (as 33% HCl) | 135 TPD |
| Caustic Flaking Unit (as 100% NaOH) | 50 TPD |
| Sodium Hypo Plant Capacity (as 15% Cl2 basis) | (#) 45 TPD |
| Liquid Chlorine (as 100% Cl2 Basis) | 16 TPD |
| Liquid Carbon Dioxide (100% Basis) | 22.6 TPD |
| Calcium Chloride granules (as 100% CaCl2 basis) | 60 TPD |
| Annual Operating Days | 330 per year |