US3751214A
Expired / Lapsed
US
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Method of and apparatus for conveying granular masses in tubular treating chambers
Assignee: Rheinbraun AG
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Filing: 1971-04-02
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Granted: 1973-08-07
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Expires: 1991-04-02
Abstract
Abstract Solid fuel, such as granular raw brown coal, is moved through an approximately horizontally disposed tubular heat treating chamber (reaction tube) by means of a carrier fluid, the flow of which is periodically interrupted or at least decreased by periodically closing a fluid discharge valve disposed downstream of the reaction tube. During the closed periods of the valve, at least one part of the granular material settles in the tube and, when the valve is opened, the matrial is rendered turbulent by the initial thrust of the carrier fluid as the latter resumes its periodic effective flow.
Inventors
- 👤 W Wenzel
- 👤 F Franke
- 👤 M Meraikib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: heating at least a portion of the external wall of said tube thereby subjecting said material to a heat treatment; and periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 2
Dependent Claim
102 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: heating at least a portion of the external wall of said tube thereby subjecting said material to a heat treatment; and periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 3
Dependent Claim
27 words
A method as defined in claim 1, wherein the variation of the fluid speeds is effected by periodically interrupting the inflow of said fluid into said tube.
Claim 4
Dependent Claim
24 words
A method as defined in claim 1, including the step of causing said fluid to begin each high-level speed period with an initial thrust.
Claim 5
Dependent Claim
96 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the step of: periodically varying the speed of said fluid between a high speed level and a low speed level by periodically interrupting the outflow of said fluid at a discharge end of said tube, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 6
Dependent Claim
96 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the step of: periodically varying the speed of said fluid between a high speed level and a low speed level by periodically interrupting the outflow of said fluid at a discharge end of said tube, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 7
Dependent Claim
27 words
A method as defined in claim 4, wherein each interruption of said outflow is effected relatively slowly and each resumption of said outflow is effected relatively rapidly.
Claim 8
Dependent Claim
110 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therEthrough, the improvement comprising the step of: periodically varying the speed of said fluid between a high speed level and a low speed level by periodically interrupting the outflow of said fluid at a dischage end of said tube synchronously with a periodic interruption of the inflow of said fluid into said tube, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 9
Dependent Claim
110 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therEthrough, the improvement comprising the step of: periodically varying the speed of said fluid between a high speed level and a low speed level by periodically interrupting the outflow of said fluid at a dischage end of said tube synchronously with a periodic interruption of the inflow of said fluid into said tube, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow.
Claim 10
Dependent Claim
117 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow; and effecting a buildup of pressure of said fluid in said tube during each period of low-speed fluid flow, said pressure causing said fluid to resume each period of high-speed fluid flow with an initial thrust.
Claim 11
Dependent Claim
117 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow; and effecting a buildup of pressure of said fluid in said tube during each period of low-speed fluid flow, said pressure causing said fluid to resume each period of high-speed fluid flow with an initial thrust.
Claim 12
Dependent Claim
97 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow; and generating said carrier fluid within said tube by submitting said material to a heat treatment.
Claim 13
Dependent Claim
97 words
In a method for conveying granular material through a horizontal or slightly inclined tube by means of a carrier fluid flowing therethrough, the improvement comprising the steps of: periodically varying the speed of said fluid between a high speed level and a low speed level, at least a substantial part of said material settles in said tube during the low-speed fluid flow and at least a substantial part of said material is conveyed by said fluid during the high-speed fluid flow; and generating said carrier fluid within said tube by submitting said material to a heat treatment.
Claim 14
Dependent Claim
21 words
A method as defined in claim 8, wherein said carrier fluid is water vapor obtained from said material in said tube.
Claim 15
Dependent Claim
44 words
A method as defined in claim 9, wherein said material is water-containing coal, more particularly raw brown coal, said method including the step of heating said tube to temperatures for effecting a drying of said coal and its decomposition and gasification with water vapor.
Claim 16
Independent Claim
121 words
An apparatus for conveying granular material by means of periodically varying the speed of a carrier fluid in the apparatus between a high speed level and a low speed level, comprising: A. an approximately horizontal tube having an inlet and an outlet, B. means for externally heating said tube, C. fluidtight feeding means attached to said inlet end of said tube and D. a closing means disposed downstream of said outlet of said tube, with the arrangement of elements (A) through (D) being such that at least a substantial part of the material settles in said tube during the low-speed fluid flow and at least a substantial part of the material is conveyed by said fluid during the high-speed fluid flow.
Claim 17
Independent Claim
121 words
An apparatus for conveying granular material by means of periodically varying the speed of a carrier fluid in the apparatus between a high speed level and a low speed level, comprising: A. an approximately horizontal tube having an inlet and an outlet, B. means for externally heating said tube, C. fluidtight feeding means attached to said inlet end of said tube and D. a closing means disposed downstream of said outlet of said tube, with the arrangement of elements (A) through (D) being such that at least a substantial part of the material settles in said tube during the low-speed fluid flow and at least a substantial part of the material is conveyed by said fluid during the high-speed fluid flow.
Claim 18
Dependent Claim
16 words
An apparatus as defined in claim 11, wherein said fluidtight feeding means includes a feeding screw.
Claim 19
Dependent Claim
24 words
An apparatus as defined in claim 11, wherein said closing means is formed as a gate for blocking the cross section of said tube.
Claim 20
Dependent Claim
12 words
An apparatus as defined in claim 11, wherein said tube extends linearly.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |