Coalescence separator, in particular for use in a compressed air compressor system, compressed air compressor system, and use of a coalescence separator

Patent metadata

Field	Value
Publication number	US-11896925-B2
Application number	US-202017008915-A
Country	US
Kind code	B2
Filing date	Sep 1, 2020
Priority date	Mar 1, 2018
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A coalescence separator for separating liquid droplets from a gas flow is provided with a multilayer structure of a coalescence filter medium as a finest stage of the coalescence separator. The multilayer structure of the coalescence filter medium is arranged between a gas inlet and a gas outlet and surrounds a cavity. A product of an air permeability of the coalescence filter medium and a grammage of the coalescence filter medium amounts to at least 16 g/m*s and maximally 100 g/m*s. The coalescence filter medium is a glass fiber paper. The coalescence separator is used, for example, as a main oil separator in screw compressors.

First claim

What is claimed is:

1. A coalescence separator for separating liquid droplets from a gas flow, the coalescence separator comprising:
a multilayer structure comprised of a coalescence filter medium as a finest stage of the coalescence separator,
wherein the multilayer structure comprised of the coalescence filter medium is configured to be arranged between a gas inlet and a gas outlet and surrounds a cavity, and
wherein a product of an air permeability of the coalescence filter medium and a grammage of the coalescence filter medium amounts to at least 16 g/m*s and maximally 100 g/m*s.

2. The coalescence separator according to claim 1 , wherein the coalescence filter medium is a glass fiber paper.

3. The coalescence separator according to claim 1 , further comprising two end discs,
wherein the multilayer structure is fastened seal-tightly between the two end discs for lateral sealing.

4. The coalescence separator according to claim 1 , wherein an individual layer thickness of the coalescence filter medium amounts to more than 0.1 mm and maximally 2 mm.

5. The coalescence separator according to claim 1 , wherein an individual layer of the coalescence filter medium comprises a grammage larger than 40 g/m 2 and less than 200 g/m 2 .

6. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises a mass to volume ratio of less than 170 kg/m 3 and larger than 80 kg/m 3 .

7. The coalescence separator according to claim 1 , wherein an individual layer of the coalescence filter medium has an air permeability of more than 180 l/m 2 s and maximally 1,500 l/m 2 s.

8. The coalescence separator according to claim 1 , wherein the multilayer structure comprises between 2 and 80 layers of the coalescence filter medium.

9. The coalescence separator according to claim 8 , wherein layers of the coalescence filter medium are immediately arranged on each other and are either stacked or wound.

10. The coalescence separator according to claim 1 , wherein the coalescence filter medium is a single layer.

11. The coalescence separator according to claim 10 , wherein the single layer is homogenous.

12. The coalescence separator according to claim 1 , wherein a total thickness of the multilayer structure amounts to at least 8 mm and maximally 60 mm.

13. The coalescence separator according to claim 1 , wherein a total air permeability of the multilayer structure amounts to less than 100 l/m 2 s.

14. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises glass fibers in a mass proportion of at least 50%.

15. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises incinerable materials in a mass proportion of maximally 10%.

16. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises a binder in a mass proportion of maximally 10%.

17. The coalescence separator according to claim 16 , wherein the binder comprises no fibers selected from the group consisting of bi-component fibers and fusible fibers.

18. The coalescence separator according to claim 16 , wherein the binder is an acrylate binder.

19. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises fibers comprising one among hydrophobic properties, fibers comprising oleophobic properties, and fibers comprising hydrophobic properties and oleophobic properties.

20. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises glass fibers, and
wherein at least 90% of the glass fibers have a fiber diameter larger than 0.5 μm.

21. The coalescence separator according to claim 1 , wherein the coalescence filter medium comprises glass fibers, and
wherein at least 90% of the glass fibers have a fiber diameter of less than 10 μm.

22. The coalescence separator according to claim 1 , wherein a finest separation stage of the coalescence separator is formed by the multilayer structure and/or the coalescence filter medium.

23. The coalescence separator according to claim 1 , wherein the multilayer structure and/or the coalescence filter medium forms a separation stage determining at least an efficiency of the coalescence separator.

24. The coalescence separator according to claim 1 , wherein the coalescence separator is configured as a first separation stage comprised of fibers and configured to be arranged downstream of a screw of a screw compressor.

25. The coalescence separator according to claim 24 , wherein the fibers are glass fibers.

26. The coalescence separator according to claim 1 , wherein the coalescence separator is configured as an exchangeable coalescence separator insert for exchangeable installation in a pressure container of a compressed air compressor.

27. The coalescence separator according to claim 1 , wherein the coalescence separator is configured as a main oil separator of a screw compressor, the coalescence separator further comprising a fine coalescing separator arranged downstream of the multilayer structure for post separation of residual oil in a compressed air flow of the screw compressor.

28. A compressed air compressor system, comprising:
a pressure container for stationary compressors, or a separator cartridge housing, the pressure container or the separator cartridge housing being embodied as a spin-on filter and mountable on a connecting head; and
a coalescence separator according to claim 1 ,
wherein the coalescence separator is arranged exchangeably in the pressure container or in the separator cartridge housing to be exchangeable together with the separator cartridge housing.

Assignees

• Mann & Hummel Gmbh

Inventors

• Grein Thomas
• Dworatzek Klemens
• Zuerker Markus

Classifications

• B01D46/0031 Primary

  with collecting, draining means · CPC title

• B01D39/2024

  otherwise bonded, e.g. by resins · CPC title

• B01D46/2411

  Filter cartridges · CPC title

• B01D46/528

  using wound sheets (B01D46/527 takes precedence) · CPC title

• B01D46/58

  connected in parallel · CPC title