Coalescence separator, in particular for use in a crankcase ventilation system, crankcase ventilation system and use of coalescence separator

Patent metadata

Field	Value
Publication number	US-11530634-B2
Application number	US-202016857654-A
Country	US
Kind code	B2
Filing date	Apr 24, 2020
Priority date	Oct 27, 2017
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A coalescence separator for separating liquid droplets from a gas flow has a gas inlet and a gas outlet. A multi-layer structure of a plurality of individual layers of a coalescence filter medium is arranged between the gas inlet and the gas outlet, wherein the coalescence filter medium is provided with a glass fiber paper with glass fibers. The individual layers of the coalescence filter medium each have an individual layer thickness of more than 0.8 mm and maximally 5 mm, a grammage of greater than 80 g/m 2 and less than 500 g/m 2 , and an air permeability of 350 l/m 2 s to 1,800 l/m 2 s. The multi-layer structure has between 2 and 80 of the individual layers.

First claim

What is claimed is:

1. A coalescence separator for separating liquid droplets from a gas flow, the coalescence separator comprising:
a gas inlet;
a gas outlet;
a multi-layer structure comprising a plurality of individual layers of a coalescence filter medium and arranged between the gas inlet and the gas outlet,
wherein the coalescence filter medium comprises a glass fiber paper with glass fibers;
wherein the individual layers of the coalescence filter medium each have an individual layer thickness of more than 0.8 mm and maximally 5 mm, a grammage of greater than 80 g/m 2 and less than 500 g/m 2 , and an air permeability of 350 l/m 2 s to 1,800 l/m 2 s;
wherein a mass proportion of incinerable materials contained in the coalescence filter medium amounts to maximally 10%.

2. The coalescence separator according to claim 1 , wherein
the multi-layer structure comprises between 2 and 80 of the individual layers.

3. The coalescence separator according to claim 2 , wherein
the individual layers are immediately arranged on each other and are either stacked or coiled.

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

5. The coalescence separator according to claim 4 , wherein
the single layer structure is homogenous.

6. The coalescence separator according to claim 1 , wherein
a total grammage of the multi-layer structure, calculated by multiplying the grammage of the individual layers by the number of the individual layers, is between 500 g/m 2 and 8,000 g/m 2 .

7. The coalescence separator according to claim 1 , wherein
a total air permeability of the multi-layer structure having the plurality of individual layers of a coalescence filter medium is between 15 l/m 2 s and 350 l/m 2 s.

8. The coalescence separator according to claim 1 , wherein
a product of the air permeability of the individual layers multiplied by the grammage of the individual layers amounts to between 110 g/m*s and 220 g/m*s.

9. The coalescence separator according to claim 1 , wherein
a mass proportion of the glass fibers of the glass fiber paper of the coalescence filter medium amounts to at least 90%.

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

11. The coalescence separator according to claim 10 , wherein
the binder contained in the coalescence filter medium contains no bi-component fibers or melt fibers.

12. The coalescence separator according to claim 10 , wherein
the binder contained in the coalescence filter medium is an acrylate binder.

13. The coalescence separator according to claim 1 , wherein
the grammage of the individual layers is greater than 100 g/m 2 .

14. The coalescence separator according to claim 1 , wherein
the air permeability of the individual layers is greater than 600 l/m 2 s.

15. The coalescence separator according to claim 1 , wherein
at least 90% of the glass fibers of the glass fiber paper of the coalescence filter medium have a fiber diameter of greater than 2.5 μm.

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

17. The coalescence separator according to claim 1 , wherein
the glass fibers of the glass fiber paper of the coalescence filter medium have an average fiber diameter of between 4 μm and 6 μm.

18. The coalescence separator according to claim 1 , wherein
a finest separation stage of the coalescence separator is formed by the multi-layer structure.

19. The coalescence separator according to claim 1 , wherein
a finest separation stage of the coalescence separator is formed by the coalescence filter medium.

20. The coalescence separator according to claim 1 , wherein
a finest separation stage of the coalescence separator is formed by the multi-layer structure and the coalescence filter medium.

21. The coalescence separator according to claim 1 , wherein
the multi-layer structure forms a separating stage of the coalescence separator that determines an efficiency of the coalescence separator.

22. The coalescence separator according to claim 1 , wherein
the coalescence filter medium forms a separating stage of the coalescence separator that determines an efficiency of the coalescence separator.

23. The coalescence separator according to claim 1 , wherein
the multi-layer structure and the coalescence filter medium form a separating stage of the coalescence separator that determines an efficiency of the coalescence separator.

24. The coalescence separator according to claim 1 , wherein
the multi-layer structure comprises two or more differently configured ones of the individual layers of the coalescence filter medium.

25. A crankcase venting system comprising a coalescence separator according to claim 1 .

26. The crankcase venting system according to claim 25 , wherein
the crankcase venting system is a closed crankcase venting system of an internal combustion engine and the coalescence separator has no further fine separator or further fine separation layer.

Assignees

• Mann & Hummel Gmbh

Inventors

• Grein Thomas
• Zuerker Markus

Classifications

• B01D2239/1258

  Permeability · CPC title

• B01D17/045

  with coalescers · CPC title

• B01D46/0031

  with collecting, draining means · CPC title

• B01D2239/1233

  Fibre diameter · CPC title

• B01D39/2017 Primary

  the material being filamentary or fibrous · CPC title