Method for processing a liquid medium and processing plant

Patent metadata

Field	Value
Publication number	US-2018080646-A1
Application number	US-201615561759-A
Country	US
Kind code	A1
Filing date	Mar 31, 2016
Priority date	Apr 10, 2015
Publication date	Mar 22, 2018
Grant date	—

Abstract

A method for processing a liquid medium, wherein the medium to be processed is conducted through a liquid circuit and the medium to be processed is heated up in the liquid circuit with the aid of a heat exchanger. A liquid-vapor separation process is carried out in a separating device, and a liquid obtained in the liquid-vapor separation process is conducted into the heat exchanger as a heating medium.

First claim

1 .- 15 . (canceled)

16 . A method for processing a liquid medium, the method comprising:
conducting the medium to be processed through a liquid circuit,
heating the medium to be processed in the liquid circuit with the aid of a heat exchanger, carrying out a liquid-steam separation in a separation device,
introducing a liquid which is produced during the liquid-steam separation into the heat exchanger as heating medium, conducting a gaseous carrier medium through an evaporator and a condenser in a cooling circuit, dispersing the medium to be processed in the evaporator by an atomizing device, wherein at least some of the dispersed medium to be processed is evaporated and picked up by the gaseous carrier medium, and condensing at least some of the evaporated medium to be processed, which is picked up by the carrier medium, in the condenser.

17 . The method as claimed in claim 16 , further comprising:
introducing a contaminated liquid from a steam drum in which a first pressure prevails into the separation device, wherein steam is separated from the contaminated liquid during the liquid-steam separation, and introducing the separated steam from the separation device into an element of a steam generator, wherein a second pressure, which is lower than the first pressure, prevails in the element, and the liquid which is produced during the liquid-steam separation is produced from the contaminated liquid.

18 . The method as claimed in claim 17 ,
wherein the element of the steam generator, into which the separated steam from the separation device is introduced, is an additional steam drum or an element of the steam generator which is connected downstream to the additional steam drum.

19 . The method as claimed in claim 16 ,
wherein the liquid which is produced during the liquid-steam separation is conducted through the heat exchanger and from the heat exchanger is introduced into the liquid circuit, wherein the liquid which is produced during the liquid-steam separation forms at least one part of the medium to be processed.

20 . The method as claimed in claim 16 ,
wherein a condensate is produced in a condenser, which condensate is degassed with the aid of a degassing device, and the degassed condensate is introduced into a steam turbine cycle and/or is deionized with the aid of an electro-deionization module.

21 . The method as claimed in claim 16 ,
wherein the medium to be processed is heated in the liquid circuit with the aid of an additional heat exchanger, wherein at least some of a process liquid, which flows through a condensate preheater, is directed from the condensate preheater into the additional heat exchanger as heating medium.

22 . The method as claimed in claim 16 ,
wherein that part of the medium to be processed which discharges from an evaporator in liquid form is cooled by an additional heat exchanger and is introduced into a buffer tank.

23 . A processing plant for processing a liquid medium, comprising:
a liquid circuit with a heat exchanger for heating the medium to be processed, a separation device, connected to the heat exchanger, adapted to carry out a liquid-steam separation, wherein a liquid which is produced during the liquid-steam separation is introduced into the heat exchanger as heating medium, a cooling circuit, which is designed with a condenser and an evaporator, the cooling circuit adapted to feed a gaseous carrier medium from the condenser to the evaporator and from the evaporator back again to the condenser, and an atomizing device, wherein the medium to be processed is dispersed in the evaporator by the atomizing device so that at least some of the dispersed medium to be processed evaporates and is picked up by the gaseous carrier medium and at least some of the evaporated medium to be processed, which is picked up by the carrier medium, is condensed in the condenser.

24 . The processing plant as claimed in claim 23 ,
wherein the liquid circuit comprises an additional heat exchanger which is adapted to cool a liquid.

25 . The processing plant as claimed claim 23 , further comprising:
a degassing device and an electro-deionization module which is connected to the degassing device.

26 . A steam turbine plant, comprising:
a processing plant as claimed in claim 23 , a steam generator with a first steam drum in which a first pressure prevails, and a second steam drum in which a second, lower pressure prevails, wherein the separation device is connected to the first steam drum and to the second steam drum.

27 . The steam turbine plant as claimed in claim 26 , further comprising:
a condensate preheater, wherein the liquid circuit comprises an additional heat exchanger for heating the medium to be processed and which is connected to the condensate preheater.

28 . A method for processing a liquid medium, the method comprising:
producing a process liquid for a steam turbine cycle and/or producing a demineralized liquid using the processing plant of claim 23 .

29 . The method as claimed in claim 16 ,
wherein the gaseous carrier medium comprises air.

30 . The method as claimed in claim 17 ,
wherein the contaminated liquid comprises blowdown water.

31 . The method as claimed in claim 19 ,
wherein the liquid which is produced during the liquid-steam separation is conducted through the heat exchanger and from the heat exchanger is introduced into a buffer tank.

Assignees

• Siemens Ag

Inventors

• Roman Hernandez Raul
• Baldauf Manfred
• Ziegmann Markus

Classifications

• F01K21/06

  Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine · CPC title

• B01D5/0069

  with degasification or deaeration · CPC title

• F01K7/16

  the engines being only of turbine type (the engines using steam of critical or overcritical pressure F01K7/32; the engines being of extraction or non-condensing type F01K7/34) · CPC title

• C02F1/20

  by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D) · CPC title

• F22B37/50

  for draining or expelling water · CPC title