EP0066984B1 - System zur Verteilung von pulverförmigem Material - Google Patents

System zur Verteilung von pulverförmigem Material Download PDF

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Publication number
EP0066984B1
EP0066984B1 EP82302551A EP82302551A EP0066984B1 EP 0066984 B1 EP0066984 B1 EP 0066984B1 EP 82302551 A EP82302551 A EP 82302551A EP 82302551 A EP82302551 A EP 82302551A EP 0066984 B1 EP0066984 B1 EP 0066984B1
Authority
EP
European Patent Office
Prior art keywords
inlet
vessel
tubes
gas
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82302551A
Other languages
English (en)
French (fr)
Other versions
EP0066984A1 (de
Inventor
Christopher Foster
Douglas Maurice Willis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Publication of EP0066984A1 publication Critical patent/EP0066984A1/de
Application granted granted Critical
Publication of EP0066984B1 publication Critical patent/EP0066984B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast

Definitions

  • This invention concerns a system for distributing particulate material.
  • the present invention has particular, although not exclusive, reference to such systems employed for distributing fuel to burners or outlets in a kiln or other equipment in which the fuel is to be burnt, for example a furnace or boiler, and in these applications can be regarded as a "firing system".
  • the fuel is often conveyed pneumatically, by entrainment, from a main input point to a distribution device and thence to the burners.
  • this distribution device per se usually involves some kind of mechanism having moving parts which are prone to malfunctioning thus resulting in unsatisfactory operation of the plant concerned and high maintenance costs.
  • the mechanism concerned can, as a rule, only serve a limited number of delivery points and the maximum is of the order of twenty, but in some systems can be less, for example the 'Octopus' system (Registered Trade Mark) serves eight. A number of mechanisms would, therefore, be required should the number of delivery points exceed the designed capacity, thus adding appreciably to the capital cost of the plant.
  • An object of the present invention is to provide an improved system for distributing particulate material substantially obviating the disadvantages of conventional systems.
  • a further object of the invention is to provide a method of operating such an improved system.
  • a system for distributing particulate material including a vessel having an inlet for particulate material, a gas manifold, a plurality of inlet tubes connected to the gas manifold and adapted to extend into the vessel, a gas inlet to the manifold, and a plurality of outlet tubes extending through the inlet tubes to define passages therebetween and having outlet connections exteriorly of the vessel, the outlet tubes defining in use, paths for entrained particulate material.
  • the vessel is conveniently a pressure vessel and the top thereof may incorporate the inlet for particulate material.
  • the gas manifold may be located externally or internally of the vessel and may be in the form of a ring main for a gas, conveniently air.
  • the inlet tubes are connected to the gas manifold and the outlet tubes may extend co-axially therethrough to define an annular passage for the gas which, in use, would flow downwardly into the vessel.
  • a cylinder advantageously of shorter length than the inlet or outlet tubes may be provided within each annular passage and is preferably adapted for sliding movement relative to the inlet and outlet tubes, the cylinder being disposed near to the free ends of the inlet and outlet tubes within the vessel.
  • a means for adjusting the position of the cylinder is conveniently provided and may comprise a threaded rod which is secured at one end to the cylinder and protrudes outside the vessel where a simple nut adjustment assembly is provided.
  • the purpose of the sliding cylinder is in effect to extend or shorten the length of the outlet tube thereby controlling, in use, the solids/air mass ratio and adjustment can take place during operation of the system.
  • each outlet tube may be positionally adjustable relative to the inlet tube.
  • a method of operating a system for distributing particulate material including the steps of passing particulate material into the vessel through the inlet thereof, feeding a positive pressure gas flow to the gas inlet of the manifold, and passing the gas through the passages defined between the inlet tubes and the outlet tubes to issue into the material in the vessel to entrain some of the material in the vicinity of the free ends of the tubes, the mixture of gas and material entrained flowing through the outlet tubes for discharge through the outlet connections.
  • the method may also include the step of varying the position of the cylinder to control the material to air mass ratio, each cylinder being actuable independently and during operation of the system.
  • the present invention thus differs from the prior art disclosed in EP-A-63629 and AT-B-92107 in that the outlet tubes pass through the inlet tubes and only one source of conveying gas is required for distributing the particulate material.
  • a system for distributing particulate material is depicted at 1 and comprises a pressure vessel 2 having in the top 4 thereof an inlet 6 for particulate material; the inlet 6 may incorporate a rotary valve (not shown) for sealing the vessel 2 and monitoring the amount of material passing therethrough into vessel 2.
  • a gas manifold 8 is located at the top of the vessel 2 and has an inlet 10 and a plurality of outlets 12 to each of which is connected an inlet tube 14 depending therefrom into the vessel 2 and terminating at a distance from the base 16 thereof. Extending co-axially through the inlet tubes 14 are outlet tubes 18 between each pair of which is defined an annular passage 20.
  • the outlet tubes 18 terminate in the vicinity of the free ends of the inlet tubes 14 and extend through the gas manifold 8 to the exterior of the vessel 2 and are suitably adapted for connection to pipes (not shown) for remote connection to points of use (not shown).
  • a cylinder 22 is disposed within each annular passage 20 towards the lower end thereof, as viewed in Figures 1 and 3 and has attached thereto a rod 24 having a threaded portion at least at its relatively outer end 25 for engagement with a lock nut arrangement 26, the outer end 25 having a knurled nut 27.
  • the system as described may be employed as a firing system for a kiln, the particulate material conveyed being crushed or pulverised coal, and the outlet tubes 18 being connected to the combustion zones of the kiln.
  • the coal is admitted to the vessel 2 through the inlet 6 and air is passed into the manifold 8 through the inlet 10.
  • the air then travels down through each annular passage 20 and entrains the coal in the vicinity of the free ends of the inlet tubes 14.
  • the entrained coal is conveyed up through each outlet tube 18 for transport to an injection point in the kiln.
  • the solids/air mass ratio may be varied by raising or lowering the cylinder 22 in each annular passage 20 thereby affording individual control on the amount of fuel passed the relevant injection point in the kiln.
  • hot particulate material from a fluidised combustion bed is admitted through the inlet 6 and air is passed into the manifold 8 through the inlet 10.
  • the air then travels down through each annular passage 20 and entrains the particulate material in the vicinity of the free ends of the inlet tubes 14.
  • the entrained material is conveyed up through each outlet tube 18 for transport either directly back to the fluidised combustion bed or indirectly through a size classification system.
  • the solids/air mass ratio may be varied by raising or lowering the cylinder 22 in each annular passage 20. In this application of the system fewer outlet connections may be employed than for the kiln firing system.
  • the system of the present invention has no moving parts save for the adjustment of the cylinder 22 and has the capacity of achieving a high solids/air mass ratio thus avoiding the disadvantage of high excess air levels associated with conventional systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Air Transport Of Granular Materials (AREA)

Claims (11)

1. System zum Verteilen von teilchenförmigem Material mit einem Behälter (2) mit einem Eingang (6) für teilchenförmiges Material, einem Gaseingangsrohr (14), welches sich in den Behälter (2) hineinerstreckt, und mit einer Mehrzahl von Ausgangsrohren (18) mit Ausgangsanschlußstücken außerhalb des Behälters (2), wobei die Ausgangsrohre (18) im Betrieb Bahnen für mitgenommenes teilchenförmiges Material definieren, gekennzeichnet durch eine Mehrzahl von Eingangsrohren (14), welche mit einem Gasverteiler (8) verbunden sind und sich in den Behälter (2) hineinerstrecken, durch einen Gaseingang (10) zum Verteiler (8), sowie dadurch, daß die Ausgangsrohre (18) sich durch die Eingangsrohre (14) hindurcherstrecken, um hierzwischen Durchgänge (20) zu definieren.
2. System nach Anspruch 1, dadurch gekennzeichnet, daß der Behälter (2) ein Druckbehälter ist.
3. System nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Gasverteiler (8) innerhalb oder außerhalb des Behälters (2) angeordnet ist.
4. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich die Ausgangsrohre (18) koaxial durch die Eingangsrohre (14) hindurch erstrecken, um ringförmige Durchgänge (20) für das Gas zu definieren.
5. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Zylinder (22) innerhalb des zwischen einem jeden Eingangsrohr (14) und einem jeden Ausgangsrohr (18) definierten Durchgangs (20) in der Nachbarschaft der freien Enden hiervon innerhalb des Gefäßes angeordnet ist.
6. System nach Anspruch 5, dadurch gekennzeichnet, daß der Zylinder (22) relativ zu den Eingangs- und Ausgangsrohren (14, 18) bewegbar ist.
7. System nach Anspruch 6, dadurch gekennzeichnet, daß en einem jeden Zylinder (22) eine Einstellstange (24) befestigt ist und dazu dient, den Zylinder (22) zu bewegen.
8. Feuerungssystem mit einem System (1) gemäß einem der vorhergehenden Ansprüche.
9. Verfahren zum Betreiben des Systems (1) gemäß einem der vorhergehenden Ansprüche, gekennzeichnet durch die Verfahrensschritte, teilchenförmiges Material in den Behälter (2) durch dessen Eingang (6) hindurch einzuführen, einen Überdruck-Gasstrom dem Gaseingang (10) des Gasverteilers (8) zuzuführen und das Gas durch die Durchgänge (20), welche zwischen den Eingangsrohren (14) und den Ausgangsrohren (18) definiert sind, hindurchzuführen, so daß es in das Material innerhalb des Behälters (2) gelangt, um etwas von diesem Material in die Nachbarschaft der freien Enden der Rohre (14, 18) mitzunehmen, wobei die Mischung aus Gas und mitgenommenem Material durch die Ausgangsrohre (18) strömt, um durch die Ausgangsanschlußteile entladen zu werden.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Position eines jeden Zylinders (22) unabhängig variierbar ist, um das Massenverhältnis Material zu Luft zu variieren.
11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß der Zylinder während des Betriebes des Systems (1) betätigbar ist.
EP82302551A 1981-06-09 1982-05-19 System zur Verteilung von pulverförmigem Material Expired EP0066984B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8117663 1981-06-09
GB8117663 1981-06-09
GB8134594 1981-11-17
GB8134594 1981-11-17

Publications (2)

Publication Number Publication Date
EP0066984A1 EP0066984A1 (de) 1982-12-15
EP0066984B1 true EP0066984B1 (de) 1984-07-25

Family

ID=26279739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302551A Expired EP0066984B1 (de) 1981-06-09 1982-05-19 System zur Verteilung von pulverförmigem Material

Country Status (3)

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EP (1) EP0066984B1 (de)
DE (1) DE3260457D1 (de)
GB (1) GB2101064B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8951315B2 (en) 2008-11-12 2015-02-10 Exxonmobil Research And Engineering Company Method of injecting fuel into a gasifier via pressurization

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT92107B (de) * 1918-11-26 1923-04-10 Comb E Economica Societa Anoni Brennstaubfeuerung.
EP0063629A1 (de) * 1981-04-29 1982-11-03 Ruhrkohle-Carborat GmbH Kohlenstaubeintrag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE93436C (de) *
US1838521A (en) * 1928-03-17 1931-12-29 Milton W Arrowood Apparatus for and method of feeding powdered fuel
FR1562781A (de) * 1967-05-12 1969-04-11

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT92107B (de) * 1918-11-26 1923-04-10 Comb E Economica Societa Anoni Brennstaubfeuerung.
EP0063629A1 (de) * 1981-04-29 1982-11-03 Ruhrkohle-Carborat GmbH Kohlenstaubeintrag

Also Published As

Publication number Publication date
GB2101064B (en) 1985-01-16
DE3260457D1 (en) 1984-08-30
EP0066984A1 (de) 1982-12-15
GB2101064A (en) 1983-01-12

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