Waste-heat steam generator

Patent metadata

Field	Value
Publication number	US-10451267-B2
Application number	US-201615542522-A
Country	US
Kind code	B2
Filing date	Jan 20, 2016
Priority date	Jan 23, 2015
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

A waste-heat steam generator has an exhaust gas channel in which at least one evaporator heating surface and at least one preheater heating surface are arranged. The evaporator heating surface and the preheater heating surface are connected together such that the preheater heating surface is arranged upstream of the evaporator heating surface on the feed-water side. The waste-heat steam generator also has a water separator arranged downstream of the evaporator heating surface on the feed-water side. An excess pipe length system is arranged outside of the exhaust gas channel and between the preheater heating surface and the evaporator heating surface on the feed-water side, the system being designed such that the feed water causes an overflow in a rising pipe of the excess pipe length system after completely filling the preheater heating surface and thus reaches the evaporator heating surface via a downpipe.

First claim

The invention claimed is:

1. A waste-heat steam generator, comprising:
an exhaust-gas channel in which at least one evaporator heating surface and at least one preheater heating surface are arranged, wherein the at least one evaporator heating surface and the at least one preheater heating surface are connected to one another in such a way that, on a feed-water side, the at least one preheater heating surface is arranged upstream of the at least one evaporator heating surface, and
a water separator which is arranged downstream of the at least one evaporator heating surface on the feed-water side,
wherein outside the exhaust-gas channel and between the at least one preheater heating surface and the at least one evaporator heating surface on the feed-water side, there is arranged an excess pipe length system which is designed in such a way that, after the complete filling of the at least one preheater heating surface with feed water, the feed water, in a riser of the excess pipe length system, reaches an overflow and thus passes into the at least one evaporator heating surface via a down pipe, and
wherein between the at least one evaporator heating surface and an atmospheric expansion device, there is provided a dewaterinq line with at least one dewaterinq valve for dewaterinq the at least one evaporator heating surface.

2. The waste-heat steam generator as claimed in claim 1 ,
wherein between the overflow of the excess pipe length system and a steam discharge line of the water separator, there is provided a vent line with a vent valve.

3. The waste-heat steam generator as claimed in claim 1 ,
wherein parallel to the at least one evaporator heating surface, there is provided a measurement line and a pressure-measurement device for measuring the level of the feed water in the at least one evaporator heating surface.

4. The waste-heat steam generator as claimed in claim 1 ,
wherein the waste-heat steam generator is of vertical design.

5. A waste-heat steam generator, comprising:
an exhaust-gas channel in which at least one evaporator heating surface and at least one preheater heating surface are arranged, wherein the at least one evaporator heating surface and the at least one preheater heating surface are connected to one another in such a way that, on a feed-water side, the at least one preheater heating surface is arranged upstream of the at least one evaporator heating surface, and a water separator which is arranged downstream of the at least one evaporator heating surface on the feed-water side,
wherein outside the exhaust-gas channel and between the at least one preheater heating surface and the at least one evaporator heating surface on the feed-water side, there is arranged an excess pipe length system which is designed in such a way that, after the complete filling of the at least one preheater heating surface with feed water, the feed water, in a riser of the excess pipe length system, reaches an overflow and thus passes into the at least one evaporator heating surface via a down pipe, and
wherein between the overflow of the excess pipe length system and a steam discharge line of the water separator, there is provided a vent line with a vent valve.

Assignees

• Siemens Ag

Inventors

• Zubrod Horst

Classifications

• F22B1/18 Primary

  the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines · CPC title

• F22B37/50

  for draining or expelling water · CPC title

• F22B1/1815 Primary

  using the exhaust gases of gas-turbines · CPC title

• F22D1/32

  arranged to be heated by steam, e.g. bled from turbines · CPC title

• F22B31/08

  Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion · CPC title