Benfield Hybrid LoHeat Process

To improve the LoHeat process, a fifth stage of solution flashing was added along with mechanical vapor recompression (MVR) to boost the fifth-stage flashed steam back to the pressure of the regenerator column. The combination of ejectors plus MVR for multi-stage heat recovery is referred to as the Benfield Hybrid LoHeat Process. If this improvement is combined with ACT-1 activator the energy consumption can be reduced to 600 kcal/Nm3 of C02 removed. 

The installed costs (in January, 1997 dollars) for a Benfield Hybrid LoHeat Process in a 1,500 tonne per day ammonia plant are shown in Table 5.34. Table 5.35 lists the energy use in different Benfield processes that could be installed in a 1,500 tonne per day ammonia plant206. 

---