US3918688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static mixing device
Assignee: Sulzer AG
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Filing: 1974-03-27
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Granted: 1975-11-11
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Expires: 1994-03-27
Abstract
Abstract The mixing device is constructed with a coarse mixing zone and fine mixing zone. The two zones are each generally constructed with corrugated plates or the like which are layered together to define a plurality of inclined criss-crossing flow ducts. The ducts in each layer are at least partially open to each other to allow cross-mixing. However, the upstream, or coarse, mixing zone is provided with a plate-like intermediate element, or the like, between each pair of adjacent corrugated plates to close off the adjacent flow ducts in the middle zones of the respective layers while leaving the edge zones open at least partially. This latter construction is to avoid a concentration gradient over the mixing zone and to provide a uniform distribution of the flowing media at the exit end of the zone.
Inventors
- 👤 Max Huber
- 👤 Gerhard Schutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/432; B01F25/4322
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A static mixing device for flowing media comprising a jacket having a wall defining a flow passage for the flowing media; at least one insert in said jacket comprising a plurality of contacting layers, each layer including a plurality of parallel flow ducts, said ducts in one layer being inclined relative to said ducts in an adjacent layer, and said ducts in adjacent layers being at least partially open to each other; and a second insert for coarse mixing in said jacket comprising a plurality of contacting layers each including a plurality of parallel inclined flow ducts, said ducts in adjacent layers being at least partially open to each other in an edge zone adjacent said jacket wall and closed to each other in a middle zone of said second insert, said second insert being disposed upstream of said first insert.
Claim 2
Dependent Claim
141 words
A static mixing device for flowing media comprising a jacket having a wall defining a flow passage for the flowing media; at least one insert in said jacket comprising a plurality of contacting layers, each layer including a plurality of parallel flow ducts, said ducts in one layer being inclined relative to said ducts in an adjacent layer, and said ducts in adjacent layers being at least partially open to each other; and a second insert for coarse mixing in said jacket comprising a plurality of contacting layers each including a plurality of parallel inclined flow ducts, said ducts in adjacent layers being at least partially open to each other in an edge zone adjacent said jacket wall and closed to each other in a middle zone of said second insert, said second insert being disposed upstream of said first insert.
Claim 3
Dependent Claim
43 words
A static mixing device as set forth in claim 1 which further comprises a plate-like intermediate element disposed between each pair of adjacent layers in said second insert to block the communication between said flow ducts of adjacent layers in said middle zone.
Claim 4
Dependent Claim
62 words
A static mixing device as set forth in claim 2 wherein each intermediate element is of rectangular shape of the same width as an adjacent layer and has apertures following a polygonal course on a side adjacent said jacket wall, each said intermediate element being centered inside said jacket wall on opposite sides of said edge zones at least at two corners.
Claim 5
Dependent Claim
32 words
A static mixing device as set forth in claim 2 wherein said intermediate element is of rectangular shape having a smaller width than an adjacent layer and being centered in said jacket.
Claim 6
Dependent Claim
35 words
A static mixing device as set forth in claim 1 wherein said second insert is constructed as a separate insert from said first insert and said first insert is a top insert for fine mixing.
Claim 7
Dependent Claim
62 words
A static mixing device as set forth in claim 1 wherein said inserts are constructed as a unitary component in vertical disposed relation with contacting layers constructed in the form of continuous surface elements, and with said second insert disposed below said first insert and which includes an intermediate element disposed between each pair of contacting layers only in said second layer.
Claim 8
Dependent Claim
91 words
A static mixing device for flowing media comprising a jacket having a wall defining a flow passage for the flowing media, and an insert in said jacket comprising a plurality of contacting layers, each layer including a plurality of parallel flow ducts, said ducts in one layer being inclined relative to said ducts in an adjacent layer, said ducts in at least two adjacent layers being at least partially open to each other in an edge zone adjacent said jacket wall and closed to each other in a middle zone thereof.
Claim 9
Dependent Claim
91 words
A static mixing device for flowing media comprising a jacket having a wall defining a flow passage for the flowing media, and an insert in said jacket comprising a plurality of contacting layers, each layer including a plurality of parallel flow ducts, said ducts in one layer being inclined relative to said ducts in an adjacent layer, said ducts in at least two adjacent layers being at least partially open to each other in an edge zone adjacent said jacket wall and closed to each other in a middle zone thereof.
Claim 10
Dependent Claim
40 words
A static mixing device as set forth in claim 7 which further comprises a plate-like intermediate element disposed between pairs of adjacent layers to block communication between said flow ducts in said pairs of adjacent layers within said middle zone.
Claim 11
Dependent Claim
61 words
A static mixing device as set forth in claim 8 wherein said element is of rectangular shape with a cut-out in each of two opposite edges, each cut-out being disposed in a respective edge zone and being of a shape to open the flow ducts of each adjacent layer terminating at said jacket wall within said edge zone to each other.
References Cited (Backward Citations)
US3618778A
Cited
US3785620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |