WATER FEEDING DEVICE FOR DOUBLE PRESSURE TYPE EXHAUST HEAT RECOVERY BOILER

摘要

PURPOSE:To provide a water feeding device for double pressure type exhaust heat recovery boiler, which prevents the deterioration of a high pressure water feed pump and an intermediate pressure water feed pump and which can be so arranged as to make the maintenance and inspection easy. CONSTITUTION:A high pressure drum 10, an intermediate pressure drum 11 and a low pressure drum 12 respectively are connected to a high pressure evaporator 3, an intermediate pressure evaporator 6 and a low pressure evaporator 8 and water is fed from the discharge pipe of a condensate pump through a fuel economizer into these drums. The fuel economizer is divided into a high pressure economizer 9b and an intermediate/low pressure economizer 9a. The discharge pipe of the condensate pump is branched off into a high pressure water feed pipe 15a and an intermediate/low pressure water feed pipe 17a. A high pressure water feed pump 16a and an intermediate/low pressure water feed pump 18a respectively are connected to these water feed pipes to feed water to the high pressure economizer and the intermediate/low pressure economizer.