Pure Flue Gas Waste Heat Boiler For Catalytic & Cracking Unit With Professional Techniccal Service

Pure Flue Gas Waste Heat Boiler for catalytic & cracking unit with professional techniccal service

SMDERI has been engaged in research and development on waste heat boiler for catalytic cracking unit in oil refinery industries for more than 40 years and obtained numbers of patents. Based on his strong R&D ability and engineering experience, SMDERI provides design, fabrication, engineering, technical supervision and EPC contract service for the new-built project & upgrade reconstruction of various types of waste heat boilers.

Pure Flue Gas Waste Heat Boiler is to recover the physical enthalpy of flue gas generated by production plant and produce steam or hot water as required by the owner. Therefore, it can not only reduce the exhaust temperature from production unit but also produce steam or hot water for further utilization, which is both environment friendly and energy saving.

Working Principle

The work flow is described below based on flue gas flow and steam-water flow:

* Flue gas flow: 

  When discharged from the production plant, the hot flue gas first flows into the water seal drum and then   is connected into the heating surface of waste heat boiler through flue gas duct. In the waste heat boiler,   the flue gas successively flows through the superheater, evaporizer, economizer, and finally the emission   duct. The heating surface of waste heat boiler supplied by SMDERI is designed as modules in order to       minimize site installation work and reduce the installation time.

* Steam-water flow:

  Feedwater system: The medium pressure deaerated water from external supply is heated at the         feedwater preheater before it is delivered to the low temperature economizer. Hot water from the low temperature economizer flows to the feedwater preheater to discharge heat there before it flows into the high temperature economizer. The flow is medium pressure deaerated water→ feedwater preheter→ low temperature economizer→ feedwater preheater→ high temperature economizer→ hot water for external consumer or steam drum

* Evaporization system: Saturated water is delivered to the evaporizer through different process pipelines, where it is heated and vaporizes. Then the steam-water mixture enters steam drum through the process piping. In this way, the evaporizer and steam establishes an evaporization system of natural circulation.

* Steam system: Saturated steam produced at the steam drum, together with those from external supply, is connected to the inlet header of low temperature superheater. It is superheated there before it flows into the high temperature superheater. The superheated steam from the outlet header of high temperature supereheater is piped to the medium steam network of the plant.

Available Service: project design, equipment supply and supervision on site installation, system testing & commissioning for new-built project / upgrade reconstruction of old boiler system.