Injection device and steam turbine system

Patent metadata

Field	Value
Publication number	US-10107491-B2
Application number	US-201515127639-A
Country	US
Kind code	B2
Filing date	Jan 21, 2015
Priority date	Mar 28, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An injection device for injecting injection fluid (chemicals) into piping through which fluid flows, the injection device comprising: an injection line through which the injection fluid flows, the injection line being connected to the piping; an injection pump disposed on the injection line; an extrusion line connected downstream of the injection pump and upstream of a target portion for air removal on the injection line; and an extrusion pump for feeding extrusion fluid to the extrusion line, wherein a discharge capacity of the extrusion pump is greater than a discharge capacity of the injection pump.

First claim

The invention claimed is:

1. An injection device for injecting injection fluid into piping through which fluid flows, the injection device comprising:
an injection line through which the injection fluid flows, the injection line being connected to the piping;
an injection pump disposed on the injection line;
an extrusion line connected downstream of the injection pump and upstream of a target portion for air removal on the injection line; and
an extrusion pump for feeding extrusion fluid to the extrusion line, wherein
a discharge capacity of the extrusion pump is greater than a discharge capacity of the injection pump, and
the target portion for air removal is a rising portion in a piping of the injection line.

2. The injection device according to claim 1 , wherein
a water pump for feeding fluid is disposed on the piping,
the extrusion line is connected downstream of the water pump disposed on the piping, and
the water pump also serves as the extrusion pump.

3. A steam turbine system comprising:
the injection device according to claim 2 ;
a boiler that generates steam;
a steam turbine that is driven by the steam;
a condenser that condenses the steam exhausted from the steam turbine to water; and
a feedwater line for passing the water generated at the condenser to the boiler, wherein the feedwater line is the piping.

4. The injection device according to claim 1 , further comprising:
a cleaning line for passing cleaning fluid to the injection line; and
a cleaning pump for feeding cleaning fluid to the cleaning line, wherein
the cleaning line constitutes a portion of the extrusion line and is connected downstream of the injection pump and upstream of the target portion for air removal on the injection line, and
the cleaning pump also serves as the extrusion pump.

5. A steam turbine system comprising:
the injection device according to claim 4 ;
a boiler that generates steam;
a steam turbine that is driven by the steam;
a condenser that condenses the steam exhausted from the steam turbine to water; and
a feedwater line for passing the water generated at the condenser to the boiler, wherein the feedwater line is the piping.

6. A steam turbine system comprising:
the injection device according to claim 1 ;
a boiler that generates steam;
a steam turbine that is driven by the steam;
a condenser that condenses the steam exhausted from the steam turbine to water; and
a feedwater line for passing the water generated at the condenser to the boiler, wherein the feedwater line is the piping.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Kido Haruka
• HAMASAKI Akihiro
• MICHINO Takashi

Classifications

• F01K7/16 Primary

  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

• C02F1/686

  Devices for dosing liquid additives · CPC title

• C02F2103/02

  Non-contaminated water, e.g. for industrial water supply · CPC title

• F22B37/025 Primary

  Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point · CPC title

• F22B37/52

  Washing-out devices · CPC title