Problem No. 44: Rise in HP CO₂ stripper outlet temperature

In the high-pressure CO₂ stripper of a urea plant, which is essentially a shell-and-tube heat exchanger, the incoming carbon dioxide feed flows counter-current to the urea solution leaving the reactor. On the shell side, the high-pressure stripper is heated with steam. The off-gas of the high-pressure stripper, containing the feed carbon dioxide along with additional carbon dioxide and ammonia from the dissociated carbamate, is then fed into the carbamate condenser or pool reactor. This round table discussion is about the high-pressure CO₂ stripper and how to solve the problem of a high temperature in the bottom of the stripper.

Sandesh Patil from Mangalore Chemicals and Fertilizers Company, India initiates this round table discussion: