AN OPTIMAL ENERGY RECOVERY SCHEM FOR CATALYTIC REFORMER GASES

摘要

Based on the idea of integrated energy utilization of process system, an original forced cooling scheme for catalytic gases is presented. Catalytic gases release heat to an additional steam generator, which works as heat source for LiBr absorption chiller. The absorption chiller supplies cold energy and further cools the process gases in order to increase the production of LPG and decrease the energy consumption.Liquor condensate quantity of the mixed hydrocarbons is calculated under a range of temperature and a certain pressure. In the case of 50t/h catalytic reformer, the theoretical calculation shows the technical feasibility of this scheme. The heat released from catalytic gases completely satisfies the heat load of LiBr absorption chiller. Production of LPG is increased by about 0.50t/h. Economic analysis proves that the forced cooling scheme is superior in benefit. For the energy recovery scheme and forced cooling system, the total capital cost is roughly RMB2,500,000, annual benefit amounts to RMB3,346,000 and the payback period is less than 9 months. It is an optimal scheme to recover the released heat from work process and drive absorption chiller, and then to utilize the cold energy in the process itself.