초록 ▼

Heat recovery boiler equipment comprising high and low pressure boiler drums and high and low pressure evaporators is disclosed. A recirculation pipeline system is also disclosed in which a control device is provided to control the flow rate of recirculated feed water to maintain a temperature below

Heat recovery boiler equipment comprising high and low pressure boiler drums and high and low pressure evaporators is disclosed. A recirculation pipeline system is also disclosed in which a control device is provided to control the flow rate of recirculated feed water to maintain a temperature below which cold corrosion occurs. The recirculation of feed water allows for a shorter starting time during restart. Additionally, pressure can be held at a predetermined value to prevent corrosion due to the intrusion of air.

대표청구항 ▼

A heat recover boiler equipment, comprising: a high pressure boiler drum and a high pressure evaporator operatively connected together; a low pressure boiler drum and a low pressure evaporator operatively connected together; a low pressure economizer and a high pressure economizer; a first pipeline

A heat recover boiler equipment, comprising: a high pressure boiler drum and a high pressure evaporator operatively connected together; a low pressure boiler drum and a low pressure evaporator operatively connected together; a low pressure economizer and a high pressure economizer; a first pipeline operatively extending between the outlet of said low pressure economizer and the inlet of said low pressure drum; a second pipeline extending between the outlet of said low pressure economizer and the inlet of said high pressure economizer, and bypassing said low pressure boiler drum; a source of feed water; pump means for receiving water from said source of feed water and pumping the water through said low pressure economizer and into each of said first and second pipelines; valve means in said first pipeline for controlling the flow of water into said low pressure boiler drum; second pump means in said second pipeline for pumping the water in said second pipeline that is downstream from said first pipeline into the inlet of said high pressure economizer; a third pipeline operatively extending between the outlet of said high pressure economizer and the inlet of said high pressure boiler drum; and valve means in said third pipelines leading to the inlet of said high pressure boiler drum for providing flow control into said high pressure boiler drum from said third pipeline.