High efficiency feedwater heater

High efficiency feedwater heater

  • CN 102,016,411 B
  • Filed: 03/19/2008
  • Issued: 03/16/2016
  • Est. Priority Date: 03/22/2007
  • Status: Active Grant
First Claim
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1. , for a feedwater heater system for waste heat recovery steam generator, described waste heat recovery steam generator has the shell of the internal discharge flow path included an inlet and an outlet and between them, and described feedwater heater system comprises:

  • Water, to water heat exchanger, is positioned at the outside of the internal discharge flow path of described waste heat recovery steam generator, described water to water heat exchanger have for accept feed water the first entrance, the second entrance, first outlet and second outlet;

    Deaerator, is positioned at the outside of the internal discharge flow path of described waste heat recovery steam generator, and described deaerator has at least one outlet, and has the first entrance and the second entrance;

    First pipeline path, being arranged to and being connected by its flowing, being connected from being connected to the flowing that first of water heat exchanger exports the flowing extended to the first entrance of described deaerator with described water;

    Second pipe path, is arranged to and is connected by its flowing, extends to be connected with the flowing of described water to the second entrance of water heat exchanger from the outlet of at least one deaerator;

    First feed-water heater, be positioned at the position of the upstream of the outlet of the inherent described waste heat recovery steam generator of internal discharge flow path of described waste heat recovery steam generator, described first feed-water heater has outlet, and has entrance;

    To water evaporimeter, comprise the coil pipe of the heat exchanger tube of the position of the upstream of inherent described first feed-water heater of the internal discharge flow path being positioned at described waste heat recovery steam generator, outlet should be had to the coil pipe of water evaporimeter;

    3rd pipeline path, being arranged to and being connected by its flowing, being connected, to make steam and described deaerator UNICOM from being connected with the flowing that described feedwater evaporator coil exports the flowing extended to the second entrance of described deaerator;

    4th pipeline path, being arranged to and being connected by its flowing, being connected from being connected to the flowing that second of water heat exchanger exports the flowing extended to the entrance of described first feed-water heater with described water;

    Second feed-water heater, give the position of the upstream of water evaporimeter described in the internal discharge flow path inherence being positioned at described waste heat recovery steam generator, described second feed-water heater has outlet, and has entrance;

    With5th pipeline path, is arranged to and is connected by its flowing, be connected the flowing extended to the entrance of described second feed-water heater be connected from the flowing of the outlet with described first feed-water heater.

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