Tube bundle-type heat exchanger, tube base, and method for sealing same

Patent metadata

Field	Value
Publication number	US-11378342-B2
Application number	US-201916971392-A
Country	US
Kind code	B2
Filing date	Feb 27, 2019
Priority date	Feb 28, 2018
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A tube bundle-type heat exchanger, to a tube base, and to a method for sealing same. Aspects of the invention relate to a tube base for a tube bundle-type heat exchanger. In particular, the tube base includes a stack of multiple tube base plates with at least one through-opening for receiving a respective tube of the tube bundle-type heat exchanger. The throughopening is sealed by at least one seal ring. Additional aspects relate to a tube bundle-type heat exchanger comprising such a tube base and to a method for sealing a tube bundle-type heat exchanger in particular in the region of the tube base.

First claim

The invention claimed is:

1. A tube base for a shell-and-tube heat exchanger, the tube base comprising:
a first tube base plate with a core and plastics sheathing surrounding the core,
a second tube base plate made of a temperature-resistant material, wherein the temperature-resistant material has no substantial flow behaviour for temperatures up to at least 200° C. and no substantial thermal expansion for temperatures between −50° C. and 200° C., and
a third tube base plate with a core and plastics sheathing surrounding the core,
wherein the first, second and third tube base plates are stacked to form a stack, wherein the second tube base plate is arranged as an intermediate plate between the first and the third tube base plate, so that a first surface of the second tube base plate is directed towards the first tube base plate and an opposite second surface of the second tube base plate is directed towards the third tube base plate, and wherein the stack comprises at least one through-opening for receiving a respective tube of the shell-and-tube heat exchanger, and
wherein the tube base further has, for each of the at least one through-opening(s) with
at least one sealing ring each for sealing the respective tube,
at least one seal seat each for receiving the at least one sealing ring wherein the seal seat is an indentation in the second tube base plate which surrounds the respective through-opening directly in ring-like manner.

2. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the core of the first and/or the third tube base plate in each case comprises at least one of a metal and a fibre-composite material.

3. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the first and third tube base plate are of identical construction.

4. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the second tube base plate is a graphite or ceramic plate.

5. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the at least one through-opening is a plurality of through-openings, and wherein the second tube base plate is of one piece, so that the same monolithic material of the second tube base plate adjoins the plurality of through-openings.

6. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the at least one sealing ring is designed with a cross section which is rectangular, trapezoidal, conical, cone-shaped, or oval in portions.

7. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein each at least one sealing ring is at least two sealing rings, and wherein each at least one seal seat comprises at least a first and a second seal seat, wherein the first seal seat is arranged as an indentation in the first surface of the second tube base plate and the second seal seat is arranged as an indentation in the second surface of the second tube base plate.

8. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the sealing rings in the respective seal seat are pressed in between the second and the first tube base plate or the second and the third tube base plate respectively in such a way that the sealing rings contact the respective plastics sheathing on at most one side.

9. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the seal seat is arranged as an indentation in a side wall of the through-opening, spaced apart from the first and second surface of the second tube base plate.

10. The tube base for a shell-and-tube heat exchanger according to claim 1 , wherein the first, second and third tube base plate are pressed against each other by wedging.

11. A shell-and-tube heat exchanger, comprising:
a tube base including a first tube base plate with a core and plastics sheathing surrounding the core,
a second tube base plate made of a temperature-resistant material, wherein the temperature-resistant material has no substantial flow behaviour for temperatures up to at least 200° C. and no substantial thermal expansion for temperatures between −50° C. and 200° C., and
a third tube base plate with a core and plastics sheathing surrounding the core,
wherein the first, second and third tube base plates are stacked to form a stack, wherein the second tube base plate is arranged as an intermediate plate between the first and the third tube base plate, so that a first surface of the second tube base plate is directed towards the first tube base plate and an opposite second surface of the second tube base plate is directed towards the third tube base plate, and wherein the stack comprises at least one through-opening for receiving a respective tube of the shell-and-tube heat exchanger, and
wherein the tube base further has, for each of the at least one through-opening(s) with
at least one sealing ring each for sealing the respective tube,
at least one seal seat each for receiving the at least one sealing ring wherein the seal seat is an indentation in the second tube base plate which surrounds the respective through-opening directly in ring-like manner and for each of the at least one through-openings a tube which passes through the respective through-opening and is sealed in by the at least one seal ring lying in the at least one seal seat.

12. The shell-and-tube heat exchanger according to claim 11 , wherein the tube is a graphite, SiC or glass tube.

13. The shell-and-tube heat exchanger according to claim 11 , wherein the shell-and-tube heat exchanger is provided for a corrosive medium and wherein the plastics sheathing is chemically resistant to the corrosive medium.

14. A method for sealing a shell-and-tube heat exchanger, the method comprising:
a tube base including a first tube base plate with a core and plastics sheathing surrounding the core,
a second tube base plate made of a temperature-resistant material, wherein the temperature-resistant material has no substantial flow behaviour for temperatures up to at least 200° C. and no substantial thermal expansion for temperatures between −50° C. and 200° C., and
a third tube base plate with a core and plastics sheathing surrounding the core,
wherein the first, second and third tube base plates are stacked to form a stack, wherein the second tube base plate is arranged as an intermediate plate between the first and the third tube base plate, so that a first surface of the second tube base plate is directed towards the first tube base plate and an opposite second surface of the second tube base plate is directed towards the third tube base plate, and wherein the stack comprises at least one through-opening for receiving a respective tube of the shell-and-tube heat exchanger, and
wherein the tube base further has, for each of the at least one through-opening(s) with
at least one sealing ring each for sealing the respective tube,
at least one seal seat each for receiving the at least one sealing ring wherein the seal seat is an indentation in the second tube base plate which surrounds the respective through-opening directly in ring-like manner,
at least one tube of the shell-and-tube heat exchanger being passed through the corresponding through-opening and sealed in by means of the at least one seal ring lying in the at least one seal seat.

15. The shell-and-tube heat exchanger according to claim 12 , wherein the shell-and-tube heat exchanger is provided for a corrosive medium and wherein the plastics sheathing is chemically resistant to the corrosive medium.

16. The tube base for a shell-and-tube heat exchanger according to cl

Assignees

• Sgl Carbon Se

Inventors

• Anetseder Werner
• Ferber Hermann
• Baldermann Klaus
• Spuller Ralph

Classifications

• F28F9/12

  by flange-type connections · CPC title

• F28D7/16 Primary

  the conduits being arranged in parallel spaced relation ({F28D7/0008 - F28D7/0058 take precedence}; F28D7/02 - F28D7/10 take precedence) · CPC title

• F28F21/04

  of ceramic; of concrete; of natural stone · CPC title

• F28F2230/00

  Sealing means · CPC title

• F28F9/0229

  Double end plates; Single end plates with hollow spaces · CPC title