US3980458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying a gaseous stream
Assignee: Technicair SA
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Filing: 1976-01-02
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Granted: 1976-09-14
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Expires: 1996-01-02
Abstract
Abstract A gaseous stream is passed from an upstream channel through a bubbling washing liquid into a downstream channel whence it passes through a horizontal channel and the purified gas is sucked out by a fan. A partition wall extending below the normal level of a washing liquid in a sump separates the upstream from the downstream channel and the horizontal channel is defined between two walls an upper one of which has an upstream end connected to the upper end of the partition wall while the lower wall is shorter and has an upstream end spaced from the partition wall. A vertical wall has an upstream end connected to the downstream end of the upper horizontal wall and is spaced from the downstream end of the lower horizontal wall, and an inclined bottom wall connects the downstream end of the vertical wall to the sump for returning collected washing liquid carried by the gaseous stream to the sump. The fan circulates the gaseous stream through the channels while bubbling it through the liquid in the sump.
Inventors
- 👤 Andre Berthoud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:28
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
224 words
An apparatus for purifying a gaseous stream charged with particles, which comprises a bubbling device including 1. a sump containing a washing liquid assuming a normal level when the liquid is at rest in the sump, 2. an inlet for the gaseous stream substantially vertically above the sump, 3. a substantially vertical partition wall having an upper end and a lower end extending below the normal level of the liquid in the sump, the partition wall separating a. a substantially vertical upstream channel between the inlet and the sump from b. a substantially vertical downstream channel arising from the sump to an upper end whereby a gaseous stream passes downwardly through the upstream channel into the liquid in the sump and upwardly from the liquid in the sump through the downstream channel, 4. two substantially horizontal walls defining therebetween a horizontal channel in communication with the downstream channel, a. an upper one of the horizontal walls having a downstream end and an upstream end connected to the upper end of the partition wall and constituting an abutment surface substantially perpendicular to the downstream channel, the upwardly passing gaseous stream moving against the abutment surface, and b. a lower one of the horizontal walls being shorter than the upper horizontal wall and having an upstream end spaced from the partition wall and a downstream end,
Claim 2
Independent Claim
224 words
An apparatus for purifying a gaseous stream charged with particles, which comprises a bubbling device including 1. a sump containing a washing liquid assuming a normal level when the liquid is at rest in the sump, 2. an inlet for the gaseous stream substantially vertically above the sump, 3. a substantially vertical partition wall having an upper end and a lower end extending below the normal level of the liquid in the sump, the partition wall separating a. a substantially vertical upstream channel between the inlet and the sump from b. a substantially vertical downstream channel arising from the sump to an upper end whereby a gaseous stream passes downwardly through the upstream channel into the liquid in the sump and upwardly from the liquid in the sump through the downstream channel, 4. two substantially horizontal walls defining therebetween a horizontal channel in communication with the downstream channel, a. an upper one of the horizontal walls having a downstream end and an upstream end connected to the upper end of the partition wall and constituting an abutment surface substantially perpendicular to the downstream channel, the upwardly passing gaseous stream moving against the abutment surface, and b. a lower one of the horizontal walls being shorter than the upper horizontal wall and having an upstream end spaced from the partition wall and a downstream end,
Claim 3
Dependent Claim
142 words
a substantially vertical wall having an upstream end connected to the downstream end of the upper horizontal wall and a downstream end, the vertical wall constituting an abutment surface substantially perpendicular to the horizontal channel, the gaseous stream moving through the horizontal channel against the abutment surface, and the vertical wall being spaced from the downstream end of the lower horizontal wall, 6. an inclined bottom wall connecting the downstream end of the vertical wall to the sump for returning collected washing liquid carried by the gaseous stream to the sump, 7. a suction chamber below the horizontal channel and in communication therewith, and 8. suction means having an input in communication with the suction chamber whereby suction applied to the chamber circulates the gaseous stream from the inlet and through the channels while bubbling it through the liquid in the sump.
Claim 4
Dependent Claim
142 words
a substantially vertical wall having an upstream end connected to the downstream end of the upper horizontal wall and a downstream end, the vertical wall constituting an abutment surface substantially perpendicular to the horizontal channel, the gaseous stream moving through the horizontal channel against the abutment surface, and the vertical wall being spaced from the downstream end of the lower horizontal wall, 6. an inclined bottom wall connecting the downstream end of the vertical wall to the sump for returning collected washing liquid carried by the gaseous stream to the sump, 7. a suction chamber below the horizontal channel and in communication therewith, and 8. suction means having an input in communication with the suction chamber whereby suction applied to the chamber circulates the gaseous stream from the inlet and through the channels while bubbling it through the liquid in the sump.
Claim 5
Dependent Claim
72 words
The apparatus of claim 1, further comprising a generally rectangular casing having two transverse side walls generally parallel to each other, one of the transverse side walls and the partition wall defining the upstream channel therebetween, the other side wall constituting the substantially vertical wall, and a bottom extending between the two side walls, the bottom having a first part defining the sump and a second part constituting the inclined bottom wall.
Claim 6
Dependent Claim
27 words
The apparatus of claim 1, wherein the cross section of the horizontal channel perpendicular to the gaseous stream flow is smaller than that of the downstream channel.
Claim 7
Dependent Claim
39 words
The apparatus of claim 1, wherein the suction means comprises a centrifugal fan arranged above the horizontal channel and a vertical suction conduit passing through the horizontal channel, the conduit connecting the suction chamber and input of the fan.
Claim 8
Dependent Claim
59 words
The apparatus of claim 4, further comprising a baffle wall having a downstream end and an upstream end connected to the downstream end of the lower horizontal wall and extending towards the downstream channel over a major portion of an inlet end of the conduit to define the suction chamber between the lower horizontal wall and the baffle wall.
Claim 9
Dependent Claim
82 words
The apparatus of claim 5, further comprising a substantially vertical interior wall defining the downstream channel with the partition wall, an upper end of the interior wall being connected to the upstream end of the lower horizontal wall and the interior wall being spaced from the downstream end of the baffle wall, and a separator of drops of the liquid mounted obliquely between the downstream end of the baffle wall and the interior wall for return of liquid drops into the sump.
Claim 10
Dependent Claim
64 words
The apparatus of claim 1, further comprising a removable cover for the bubbling device, the cover including two downwardly projecting cheek plates, two substantially vertical walls extending between the cheek plates, one of the vertical walls constituting the partition wall and the other vertical wall defining the downstream channel with the one vertical wall, and the lower horizontal wall extending between the cheek plates.
Claim 11
Dependent Claim
86 words
The apparatus of claim 7, wherein the cover is a hollow housing, the suction means comprising a centrifugal fan having an input and an output, the fan being mounted in the housing, a vertical suction conduit passing through the horizontal channel into the hollow housing, the conduit connecting the suction chamber and the input of the fan, and the output of the fan opening into the hollow housing which constitutes a receiving chamber for the purified gaseous stream, the fan being rotatable about a vertical axis.
Claim 12
Dependent Claim
42 words
The apparatus of claim 1, further comprising a substantially vertical interior wall defining the downstream channel with the partition wall and extending below the normal level of the liquid in the sump, the interior wall and the sump defining a gap therebetween.
Claim 13
Dependent Claim
18 words
The apparatus of claim 9, wherein the interior wall descends into the liquid lower than the partition wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |