Heat exchanger tube block, exhaust heat recovery boiler, and method of constructing exhaust heat recovery boiler

Patent metadata

Field	Value
Publication number	US-12339077-B2
Application number	US-201917298794-A
Country	US
Kind code	B2
Filing date	Jul 19, 2019
Priority date	Nov 30, 2018
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A heat exchanger tube block is stacked on another heat exchanger tube block in an upper-lower direction and connected to the another heat exchanger tube block. The heat exchanger tube block includes: a duct casing wherein exhaust gas containing dust flows in the upper-lower direction; a heat exchanger tube in the duct casing extends horizontally; an inlet header connects to the heat exchanger tube inlet; an outlet header connected to an outlet of the heat exchanger tube; and a vibration transmitting member transmitting vibration, applied to an upper end part of the vibration transmitting member, to the heat exchanger tube to make the dust accumulating on the heat exchanger tube fall. A lower end of the duct casing is formed horizontally. The inlet header is located higher than the lower end of the duct casing. The outlet header is located higher than the lower end of the duct casing.

First claim

The invention claimed is:

1. A heat exchanger tube block comprising:
a duct casing in which exhaust gas containing dust flows in an upper-lower direction;
a heat exchanger tube located in the duct casing and extending in a horizontal direction;
an inlet header connected to an inlet of the heat exchanger tube;
an outlet header connected to an outlet of the heat exchanger tube; and
a vibration transmitting body configured to transmit vibration, applied to an upper end part of the vibration transmitting body, to the heat exchanger tube to make the dust accumulating on the heat exchanger tube fall, wherein:
upper and lower surfaces of the duct casing are open;
the duct casing is formed in a tubular shape;
a lower end of the duct casing extends horizontally;
an upper end of the duct casing extends horizontally;
the inlet header is located higher than the lower end of the duct casing;
the outlet header is located higher than the lower end of the duct casing;
the duct casing includes a lower recess formed such that an outer surface of the duct casing is concave inward;
the lower recess is located under the vibration transmitting body and is formed so as to open downward and outward in the horizontal direction;
the duct casing includes an upper recess formed such that an outer surface of the duct casing is concave inward;
the upper recess is formed so as to open upward and outward in the horizontal direction, with an upper end of the upper recess being located at the upper end of the duct casing;
the upper end part of the vibration transmitting body extends above the upper recess; and
the inlet header is located at a hollow portion of the duct casing below the heat exchanger tube between the upper and lower recesses and the outlet header.

2. The heat exchanger tube block according to claim 1 , wherein the upper end part of the vibration transmitting body projects to an outside of the duct casing.

3. The heat exchanger tube block according to claim 1 , wherein:
the outlet header is located lower than the upper end of the duct casing.

4. An exhaust heat recovery boiler comprising a plurality of heat exchanger tube blocks each of which is the heat exchanger tube block according to claim 1 , wherein
the plurality of heat exchanger tube blocks are stacked on each other in the upper-lower direction and connected to each other.

5. A method of manufacturing an exhaust heat recovery boiler,
the method comprising
stacking a plurality of heat exchanger tube blocks, each of which is the heat exchanger tube block according to claim 1 , on each other in the upper-lower direction and connecting the plurality of heat exchanger tube blocks to each other.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nozoe Takuro
• Takenaka Yukihiro
• Ino Tatsuo
• Yukioka Atsushi
• Yamamoto Shuji
• Tanaka Toshinori
• Nakamura Ryo
• Zhang Hao
• Fang Wei

Classifications

• F22B37/24

  Supporting, suspending or setting arrangements, e.g. heat shielding · CPC title

• F22B31/08 Primary

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

• F23J3/023

  cleaning the fireside of watertubes in boilers · CPC title

• F28D7/00

  Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall · CPC title

• F28D21/001

  for thermal power plants or industrial processes · CPC title