Treatment installation and method for treating workpieces

Patent metadata

Field	Value
Publication number	US-12422188-B2
Application number	US-201616060821-A
Country	US
Kind code	B2
Filing date	Dec 12, 2016
Priority date	Dec 10, 2015
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

In order to provide a treatment installation which is of simple construction and enables an energy-efficient workpiece treatment, it is proposed that the treatment installation comprises the following:
a treatment chamber which comprises multiple treatment chamber sections that are each associated with one of multiple separate circulatory air modules of the treatment installation; a heating installation which comprises a heating gas conduit, wherein multiple circulatory air modules are coupled to the heating gas conduit, in particular for heating the gas guided through the treatment chamber sections.

First claim

The invention claimed is:

1. A treatment installation for treating workpieces, the treatment installation comprising:
a treatment chamber including multiple separate treatment chamber sections that are each associated with one of multiple separate circulatory air modules of the treatment installation;
a heating installation including a heating device, a heating gas conduit, and a heat exchanger,
wherein the circulatory air modules are fluidly coupled to the heating gas conduit through which a heating gas is guided, the ones of the circulatory air modules to guide a separate circulatory gas stream of heating gas from the heating gas conduit through the respective treatment chamber sections, wherein the heat exchanger transfers heat produced in the heating device to the heating gas of the heating gas conduit; and
a removal section of the heating gas conduit to remove gas from ones of the circulatory air modules and to provide the removed gas to the heat exchanger, bypassing the heating device, for reheating it as heating gas.

2. The treatment installation in accordance with claim 1 , wherein the heat exchanger is of a multistage configuration.

3. The treatment installation in accordance with claim 2 , wherein multiple heat transfer stages of the heat exchanger are at least one of arranged spatially successively in a direction or are fluidly coupled to each other in such a way that a hot gas from a combustion device, which releases heat, flows consecutively through the heat transfer stages in said direction.

4. The treatment installation in accordance with claim 2 , wherein a hot gas from a combustion device and a cold gas is to flow through the heat exchanger in such a way that the cold gas flows alternatingly through one or more hotter and one or more colder heat transfer stages with respect to a respective preceding heat transfer stage.

5. The treatment installation in accordance with claim 2 , wherein multiple heat exchangers of the treatment installation jointly form a heat exchanger device, and wherein the heat exchangers form heat transfer sections of the heat exchanger device which spatially adjoin each other.

6. The treatment installation in accordance with claim 5 , wherein a hot gas, which forms a heat source, is able to flow consecutively through heat transfer stages of all heat transfer sections, wherein multiple cold gases, which form a heat sink and are to be heated by heat transfer from the hot gas, are provided, and wherein in each case one cold gas to be heated is associated with each heat transfer section.

7. The treatment installation in accordance with claim 6 , wherein at least one of:
the cold gas is the hot gas;
the cold gas is circulatory air of one or more circulatory air conduits or air circulators; or
the cold gas is fresh gas.

8. The treatment installation in accordance with claim 2 , wherein the heat exchanger includes a tube bundle heat exchanger which includes multiple hollow-cylindrical tubes, and wherein a chamber surrounding the hollow-cylindrical tubes is divided by multiple dividing plates into at least one of multiple mutually separated heat transfer regions, heat transfer sections or heat transfer stages.

9. The treatment installation in accordance with claim 8 , wherein at least one of two heat transfer regions, heat transfer sections, or heat transfer stages are separated from each other by two dividing plates, and wherein a gap region is formed between the two dividing plates, to which gap region sealing air is suppliable.

10. The treatment installation in accordance with claim 1 , further including a combustion device for heating the gas guided through the respective multiple separate treatment chamber sections.

11. The treatment installation in accordance with claim 10 , wherein the combustion device includes at least one of a gas burner, a gas turbine, or a micro gas turbine, for producing exhaust gas.

12. The treatment installation in accordance with claim 10 , wherein one or more circulatory air modules or one or more circulatory air conduits each include one or more injector devices for supplying the heating gas stream to the treatment chamber in accordance with an injector principle.

13. The treatment installation in accordance with claim 12 , wherein the heating gas stream is introducible into the treatment chamber by one or more injector nozzles of the respective injector device with a flow rate of at least about 10 m/s.

14. The treatment installation in accordance with claim 12 , wherein the heating gas stream is introducible into the treatment chamber by one or more injector nozzles of the respective injector device with a temperature of at least about 150° C.

15. The treatment installation in accordance with claim 1 , wherein ones of the circulatory air modules include a respective blower.

16. The treatment installation in accordance with claim 1 , further including a pre-treatment installation.

17. The treatment installation in accordance with claim 16 , wherein the pre-treatment installation includes a second treatment chamber including respective separate treatment chamber sections with corresponding circulatory air modules.

18. The treatment installation in accordance with claim 17 , wherein the second treatment chamber is fluidly coupled to the heating gas conduit.

19. The treatment installation in accordance with claim 1 , wherein the heating gas conduit is configured to be annularly closed.

20. The treatment installation in accordance with claim 1 , wherein the heating gas conduit includes a circulatory air conduit which is formed in sections by multiple circulatory air modules and/or treatment chamber sections which are arranged in parallel.

21. The treatment installation in accordance with claim 1 , wherein the heating gas conduit includes a central heating gas line, by which a heating gas is annularly guidable from the heat exchanger for heating the heating gas to the circulatory air modules and/or the treatment chamber sections and again back to the heat exchanger.

22. The treatment installation in accordance with claim 1 , wherein the heating gas guided in the heating gas conduit is drivable by exactly one blower or by multiple blowers.

23. The treatment installation in accordance with claim 1 , wherein the heating gas conduit includes multiple bifurcations or branchings for distributing the heating gas, guided in the heating gas conduit, to the circulatory air modules and/or the treatment chamber sections.

24. A method for treating workpieces, the method comprising:
providing multiple gas streams of heated heating gas, guided in separate circulatory gas streams, to flow through multiple separate treatment chamber sections of a treatment chamber of a treatment installation, ones of the treatment chamber sections associated with respective ones of circulatory air modules of the treatment installation, ones of the circulatory air modules to guide the separate circulatory gas stream through respective treatment chamber sections;
heating the circulatory gas streams by a heating gas stream of a heating gas conduit of a heating installation, wherein the heating gas conduit is fluidly coupled to the circulatory air modules and heat that is produced by a heating device of the heating installation is transferred via a heat exchanger of the heating installation to the heating gas stream of the heating gas conduit;
removing, by a removal section of the heating gas conduit, gas from the circ

Assignees

• Duerr Systems Ag

Inventors

• Iglauer Oliver
• Woll Kevin
• Wieland Dietmar

Classifications

• F26B21/25

  partly outside the drying enclosure · CPC title

• F26B21/20 Primary

  Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure · CPC title

• F26B21/50

  Ducting arrangements from the source of air or other gases to the materials or objects being dried · CPC title

• F28D7/0066

  Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids (F28D7/103 takes precedence) · CPC title

• F26B23/02

  using combustion heating ({F26B3/305, F26B13/186, F26B21/001, } F26B23/10 take precedence) · CPC title