Nothing Special   »   [go: up one dir, main page]

US3182825A - Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure - Google Patents

Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure Download PDF

Info

Publication number
US3182825A
US3182825A US301328A US30132863A US3182825A US 3182825 A US3182825 A US 3182825A US 301328 A US301328 A US 301328A US 30132863 A US30132863 A US 30132863A US 3182825 A US3182825 A US 3182825A
Authority
US
United States
Prior art keywords
rotator
pressure
space under
container
valves
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 - Lifetime
Application number
US301328A
Inventor
Zellerhoff Bruno
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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
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 Koppers Co Inc filed Critical Koppers Co Inc
Priority to US301328A priority Critical patent/US3182825A/en
Application granted granted Critical
Publication of US3182825A publication Critical patent/US3182825A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • B01J8/002—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor with a moving instrument
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/02—Feed or outlet devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/16—Pneumatic conveyors
    • B65G2812/1608—Pneumatic conveyors for bulk material
    • B65G2812/1616—Common means for pneumatic conveyors
    • B65G2812/1625—Feeding or discharging means

Definitions

  • This invention relates to apparatus for feeding material from a zone of predetermined pressure to a zone of high pressure.
  • the pressure is maintained in the space prevailing under high pressure by arranging in the upper part of the supply tank prevailing under pressure a rotator which is provided at its periphery with openings closed under spring pressure and which revolves at a high speed; and supplying the material to the rotator through a feed pipe which passes gastightly through the supply tank and is gastightly connected with the rotator.
  • the powdered or fine-grained material is supplied to the storage tank prevailing under pressure only through the openings of the rotator which revolves at a high speed when the spring-pressure Valves which open under the effect of centrifugal force release the way for passage of powdered material against the pressure in the supply tank. If the pressure in the supply tank is higher than the centrifugal pressure formed by the centrifugal force, the valves are closed by the pressure in the tank and the pressure of the spring, so that an escape of the pressure medium from the tank through the rotator is excluded.
  • the inner space of the rotator constructed according to the invention consists of a concentric space connected to the feed pipe and conical branches leading to the peripheral openings, so that a light plug-like filling is formed in the conical branches; this counteracts an opening during the turning by centrifugal action.
  • the feed pipe which is firmly connected with the rotator is rotatably mounted and projects in an apparatus for charging the material.
  • FIGURE 1 is a vertical section through a supply tank provided with the rotator conforming to the invention and the connected charging apparatus to the gasifier.
  • FIGURE 2 is a horizontal section through the rotator.
  • Powdered fuel is introduced to gasifier 1 through a screw conveyor 2 which is supplied from a supply tank 3.
  • Screw conveyor 2 has at its end a conical grinding means 4 which loosens the powdered fuel compressed in the screw conveyor.
  • the powdered fuel is finely distributed r 3,182,825 Patented May 11, 1965 in oxygen introduced at 5 and is then introduced into the gasifier 1 through a feed pipe 6.
  • the supply tank 3 prevailing under pressure is charged up to about level 7.
  • a rotator 10 projects in the free space 8 of the supply tank above level 7.
  • Rotator 10 is gastightly connected with a pipe 9 which passes gastightly through the cover of the supply tank in a stufiing box 11.
  • the pipe 9 is mounted in journal and radial ball bearings 12, 13. i
  • the pipe is provided with a gear 14 and is maintained in revolution during the charging by a motor 16 revolving at a high speed with interposition of a transmission 15.
  • the pipe 9 passes through the outlet of a feed bunker 18 in a stufiing box 17 and is provided with spherical slings 19 arranged on the top of rods of various length,
  • Rotator 10 consists of a circular housing which has on the inside a concentric free space 20 located in the passageway of pipe 9. Radial branches 21 which are constructed conically and the number of which corresponds to the desired throughput are connected to this free space.
  • Conical branches 21 discharge into openings 22 which are closed in the state of rest by valves 23 acting against valve seats 30.
  • the closed position of valves 23 is effected by pressure springs 25 supported on bows 24.
  • Valves 23 are opened against the spring pressure under the effect of the centrifugal force of the rotator revolving at a high speed, so that the coal collected in the inner space of the rotator can leave through the slit formed thereby.
  • the discharge of the powdered fuel takes place against the high pressure maintained in the free space 8 of the supply tank 3.
  • the high pressure is maintained by introduction of nitrogen at 26 and the pressure corresponds to the pressure of the oxygen introduced at 5 to the charging apparatus leading to the gasifier.
  • Apparatus for injecting particulate matter into a pressurized atmosphere comprising:
  • said rotator being a tubular member projecting within said container and terminating therein as a hollow vessel, and having a plurality of outwardly extending peripheral valve seats, a weighted valve head for each set, a bowed retaining member extending outwardly of each valve, and a compression spring between each said bowed member and said valve head operable in response to centrifugal force to open the port as said rotator rotates about its axis;
  • said rotator includes a plurality of radial internal 5 material delivery channels connecting respective peripheral valves.
  • (a) means is provided to continuously inject material into said rotator while it rotates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Description

B. ZELLERHOFF FER May 11, 1965 3,182,825 ULAR MATERIAL 0 A SPACE APPARATUS FOR TRANS OF A POWDERED OR GRAN FROM A SPACE UNDER LOW PRESSURE INT UNDER HIGH PRESSURE 2 Sheets-Sheet 1 Filed Aug. 12, 1963 GAS/FIE? OXYGEN a scnsw CONVEYOR 4 INVENTOR. BPMVO THEE/10F) 'FIG. 2
y 1965 B. ZELLERHOFF 3,132,825
APPARATUS FOR TRANSFER OF A POWDERED 0R GRANULAR MATERIAL FROM A SPACE UNDER LOW PRESSURE INTO A SPACE UNDER HIGH PRESSURE Filed Aug. 12, 1963 2 Sheets-Sheet 2 IN VENTOR. BfiU/VO ZELZEPl/OFF dtzfavzg United States Patent 3,182,825 APPARATUS FOR TRANSFER OF A POWDERED 0R GRANULAR MATERIAL FROM A SPACE UNDER LOW PRESSURE INTO A SPACE UNDER HIGH PRESSURE Bruno Zellerhofi, Essen-Werden, Germany, assignor, by
mesne assignments, to Koppers Company, Inc., Pittsburgh, Pa., a corporation of Delaware Filed Aug. 12, 1963, Ser. No. 301,328 3 Claims. (Cl. 214-17) This invention relates to apparatus for feeding material from a zone of predetermined pressure to a zone of high pressure.
Upon introducing powdered or fine-grained materials from a space under low pressure, for example a space prevailing under atmospheric pressure, into a space prevailing under high pressure, it is necessary to solve the problem of substantially preventing an escape of the pressure medium in order not to have to replenish pressure medium constantly, as in the case in known apparatus which consist of storage tanks, bins, and sluices, etc.
According to the invention, the pressure is maintained in the space prevailing under high pressure by arranging in the upper part of the supply tank prevailing under pressure a rotator which is provided at its periphery with openings closed under spring pressure and which revolves at a high speed; and supplying the material to the rotator through a feed pipe which passes gastightly through the supply tank and is gastightly connected with the rotator.
In this way the powdered or fine-grained material is supplied to the storage tank prevailing under pressure only through the openings of the rotator which revolves at a high speed when the spring-pressure Valves which open under the effect of centrifugal force release the way for passage of powdered material against the pressure in the supply tank. If the pressure in the supply tank is higher than the centrifugal pressure formed by the centrifugal force, the valves are closed by the pressure in the tank and the pressure of the spring, so that an escape of the pressure medium from the tank through the rotator is excluded.
The inner space of the rotator constructed according to the invention consists of a concentric space connected to the feed pipe and conical branches leading to the peripheral openings, so that a light plug-like filling is formed in the conical branches; this counteracts an opening during the turning by centrifugal action.
According to the invention, the feed pipe which is firmly connected with the rotator is rotatably mounted and projects in an apparatus for charging the material.
The invention is illustrated by way of example in the drawings which show a charging apparatus for pressure gasification apparatus.
FIGURE 1 is a vertical section through a supply tank provided with the rotator conforming to the invention and the connected charging apparatus to the gasifier.
FIGURE 2 is a horizontal section through the rotator.
Powdered fuel is introduced to gasifier 1 through a screw conveyor 2 which is supplied from a supply tank 3. Screw conveyor 2 has at its end a conical grinding means 4 which loosens the powdered fuel compressed in the screw conveyor. The powdered fuel is finely distributed r 3,182,825 Patented May 11, 1965 in oxygen introduced at 5 and is then introduced into the gasifier 1 through a feed pipe 6.
The supply tank 3 prevailing under pressure is charged up to about level 7. A rotator 10 projects in the free space 8 of the supply tank above level 7. Rotator 10 is gastightly connected with a pipe 9 which passes gastightly through the cover of the supply tank in a stufiing box 11. The pipe 9 is mounted in journal and radial ball bearings 12, 13. i
The pipe is provided with a gear 14 and is maintained in revolution during the charging by a motor 16 revolving at a high speed with interposition of a transmission 15.
The pipe 9 passes through the outlet of a feed bunker 18 in a stufiing box 17 and is provided with spherical slings 19 arranged on the top of rods of various length,
in order to bring the material stored in bunker 18 into pipe 9 in the loosened state.
Rotator 10 consists of a circular housing which has on the inside a concentric free space 20 located in the passageway of pipe 9. Radial branches 21 which are constructed conically and the number of which corresponds to the desired throughput are connected to this free space.
Conical branches 21 discharge into openings 22 which are closed in the state of rest by valves 23 acting against valve seats 30. The closed position of valves 23 is effected by pressure springs 25 supported on bows 24.
Valves 23 are opened against the spring pressure under the effect of the centrifugal force of the rotator revolving at a high speed, so that the coal collected in the inner space of the rotator can leave through the slit formed thereby. The discharge of the powdered fuel takes place against the high pressure maintained in the free space 8 of the supply tank 3. The high pressure is maintained by introduction of nitrogen at 26 and the pressure corresponds to the pressure of the oxygen introduced at 5 to the charging apparatus leading to the gasifier.
The introduction of any type of powdered or finegrained materials into a tank under high pressure is possible with the described apparatus.
I claim:
1. Apparatus for injecting particulate matter into a pressurized atmosphere comprising:
(a) a container capable of withstanding superatmospheric pressure;
(b) a rotator extending through said container and disposed therein;
(0) means to rotate said rotator;
(d) said rotator being a tubular member projecting within said container and terminating therein as a hollow vessel, and having a plurality of outwardly extending peripheral valve seats, a weighted valve head for each set, a bowed retaining member extending outwardly of each valve, and a compression spring between each said bowed member and said valve head operable in response to centrifugal force to open the port as said rotator rotates about its axis; and
(e) means for introducing particulate material into said tubular member at substantially atmospheric pressure whereby said material is centrifugally ejected via said valves into the superatmospheric interior of 3 said container as said rotator rotates and the compression spring of said valves close said valves to prevent flow material when rotation stops. 2. The invention set forth in claim 1 wherein:
(a) said rotator includes a plurality of radial internal 5 material delivery channels connecting respective peripheral valves.
3. The invention set forth in claim 1 wherein:
(a) means is provided to continuously inject material into said rotator while it rotates.
4 References Cited by the Examiner UNITED STATES PATENTS 975,232 11/10 Hanes et al 103-100 1,661,986 3/28 Yetter 103-100 2,692,702 10/54 Church 222-410 2,822,097 2/58 Lee 214--17.64 2,920,793 1/ 60 Munsell 222410 X LOUIS I. DEMBO, Primary Examiner.
HADD S. LANE, RAPHAEL M. LUPPO, Examiners.

Claims (1)

1. APPARATUS FOR INJECTING PARTICULATE MATTER INTO A PRESSURIZED ATMOSPHERE COMPRISING: (A) A CONTAINER CAPABLE OF WITHSTANDING SUPRATMOSSPHERIC PRESSURE; (B) A ROTATOR EXTENDING THROUGH SAID CONTAINER AND DISPOSED THEREIN; (C) MEANS TO ROTATE SAID ROTATOR; (D) SAID ROTATOR BEING A TUBULAR MEMBER PROJECTING WITHIN SAID CONTAINER AND TERMINATING THEREIN AS A HOLLOW VESSEL, AND HAVING A PLURALITY OF OUTWARDLY EXTENDING PERIPHERAL VALVE SEATS, A WEIGHTED VALVE HEAD FOR EACH SET, A BOWED RETAINING MEMBER EXTENDING OUTWARDLY OF EACH VALVE, AND A COMPRESSION SPRING BETWEEN EACH SAID BOWED MEMBER AND SAID VALVE HEAD OPERABLE IN RESPONSIVE TO CENTRIFUGAL FORCE TO OPEN THE PORT AT SAID ROTATOR ROTATES ABOUT ITS AXIS; AND (E) MEANS FOR INTRODUCING PARTICULATE MATERIAL INTO SAID TUBULAR MEMBER AT SUBSTANTIALLY ATMOSPHERIC PRESSURE WHEREBY SAID MATERIAL IS CENTRIFUGALLY EJECTED VIA SAID VALVES INTO THE SUPERATMOSPHERIC INTERIOR OF SAID CONTAINER AS SAID ROTATOR ROTATES AND THE COMPRESSION SPRING OF SAID VALVES CLOSE SAID VALVES TO PREVENT FLOW MATERIAL WHEN ROTATION STOPS.
US301328A 1963-08-12 1963-08-12 Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure Expired - Lifetime US3182825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US301328A US3182825A (en) 1963-08-12 1963-08-12 Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US301328A US3182825A (en) 1963-08-12 1963-08-12 Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure

Publications (1)

Publication Number Publication Date
US3182825A true US3182825A (en) 1965-05-11

Family

ID=23162889

Family Applications (1)

Application Number Title Priority Date Filing Date
US301328A Expired - Lifetime US3182825A (en) 1963-08-12 1963-08-12 Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure

Country Status (1)

Country Link
US (1) US3182825A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034870A (en) * 1974-05-15 1977-07-12 Duch Bernard P Device for introducing a substance, particularly a pulverulent substance, from a chamber having a pressure P1, into a chamber having a pressure P2 higher than P1
US4049133A (en) * 1975-04-24 1977-09-20 Shell Internationale Research Maatschappij B.V. Process and apparatus for the supply of a dry, free-flowing coal powder to a high-pressure coal gasification reactor
US4077541A (en) * 1976-06-04 1978-03-07 Stanford Research Institute Particulate material feeding method and apparatus
US4120410A (en) * 1976-09-13 1978-10-17 Shell Internationale Research Maatschappij B.V. Apparatus for the supply of fuel powder to a gas-pressurized vessel
WO1980002278A1 (en) * 1979-04-23 1980-10-30 Lockheed Missiles Space The kinetic extruder:a dry pulverized solid material pump
WO1980002279A1 (en) * 1979-04-23 1980-10-30 Lockheed Missiles Space A system for throttling and compensation for variable feedstock properties
WO1980002413A1 (en) * 1979-05-07 1980-11-13 Lockheed Missiles Space Apparatus for throttling a dry pulverized solid material pump
EP0029262A1 (en) * 1979-11-14 1981-05-27 Shell Internationale Researchmaatschappij B.V. A method and device for the feeding of finely divided solid matter to a gas-containing vessel
WO1982000993A1 (en) * 1980-09-17 1982-04-01 Lockheed Missiles Space The kinetic extruder:a dry pulverized solid material pump
WO1982001537A1 (en) * 1980-10-23 1982-05-13 Lockheed Missiles Space Means and apparatus for throttling a dry pulverized solid material pump
US4439200A (en) * 1981-12-14 1984-03-27 Lockheed Missiles & Space Co., Inc. Single stage high pressure centrifugal slurry pump
US4605352A (en) * 1981-11-20 1986-08-12 Shell Oil Company Centrifugal pump for pulverized material
FR2616457A1 (en) * 1987-06-12 1988-12-16 Andritz Ag Maschf DISPENSING SYSTEM ASSOCIATED WITH A CONTAINER, PARTICULARLY FOR THE DISTRIBUTION OF THE PRODUCT FROM A CELLULOSE BLEACHING TOWER
EP0430832A1 (en) * 1989-12-01 1991-06-05 Pignat S.A. Metering feeding for powdered, granular, party products or the like

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US975232A (en) * 1909-06-07 1910-11-08 George E Hanes Centrifugal pump.
US1661986A (en) * 1926-07-21 1928-03-06 Aaron E Yetter Pump
US2692702A (en) * 1949-12-09 1954-10-26 Phillips Petroleum Co Pebble feeder
US2822097A (en) * 1955-08-10 1958-02-04 Us Hoffman Machinery Corp Centrifugal trickle valve
US2920793A (en) * 1957-04-25 1960-01-12 Cabot Godfrey L Inc Air-tight discharge valve for discharging fine solid materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US975232A (en) * 1909-06-07 1910-11-08 George E Hanes Centrifugal pump.
US1661986A (en) * 1926-07-21 1928-03-06 Aaron E Yetter Pump
US2692702A (en) * 1949-12-09 1954-10-26 Phillips Petroleum Co Pebble feeder
US2822097A (en) * 1955-08-10 1958-02-04 Us Hoffman Machinery Corp Centrifugal trickle valve
US2920793A (en) * 1957-04-25 1960-01-12 Cabot Godfrey L Inc Air-tight discharge valve for discharging fine solid materials

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034870A (en) * 1974-05-15 1977-07-12 Duch Bernard P Device for introducing a substance, particularly a pulverulent substance, from a chamber having a pressure P1, into a chamber having a pressure P2 higher than P1
US4049133A (en) * 1975-04-24 1977-09-20 Shell Internationale Research Maatschappij B.V. Process and apparatus for the supply of a dry, free-flowing coal powder to a high-pressure coal gasification reactor
US4077541A (en) * 1976-06-04 1978-03-07 Stanford Research Institute Particulate material feeding method and apparatus
US4120410A (en) * 1976-09-13 1978-10-17 Shell Internationale Research Maatschappij B.V. Apparatus for the supply of fuel powder to a gas-pressurized vessel
WO1980002278A1 (en) * 1979-04-23 1980-10-30 Lockheed Missiles Space The kinetic extruder:a dry pulverized solid material pump
WO1980002279A1 (en) * 1979-04-23 1980-10-30 Lockheed Missiles Space A system for throttling and compensation for variable feedstock properties
US4265580A (en) * 1979-04-23 1981-05-05 Lockheed Missiles & Space Company, Inc. System for throttling and compensation for variable feedstock properties
US4362441A (en) * 1979-05-07 1982-12-07 Lockheed Missiles & Space Company, Inc. Means and apparatus for throttling a dry pulverized solid material pump
WO1980002413A1 (en) * 1979-05-07 1980-11-13 Lockheed Missiles Space Apparatus for throttling a dry pulverized solid material pump
EP0029262A1 (en) * 1979-11-14 1981-05-27 Shell Internationale Researchmaatschappij B.V. A method and device for the feeding of finely divided solid matter to a gas-containing vessel
WO1982000993A1 (en) * 1980-09-17 1982-04-01 Lockheed Missiles Space The kinetic extruder:a dry pulverized solid material pump
WO1982001537A1 (en) * 1980-10-23 1982-05-13 Lockheed Missiles Space Means and apparatus for throttling a dry pulverized solid material pump
US4605352A (en) * 1981-11-20 1986-08-12 Shell Oil Company Centrifugal pump for pulverized material
US4439200A (en) * 1981-12-14 1984-03-27 Lockheed Missiles & Space Co., Inc. Single stage high pressure centrifugal slurry pump
FR2616457A1 (en) * 1987-06-12 1988-12-16 Andritz Ag Maschf DISPENSING SYSTEM ASSOCIATED WITH A CONTAINER, PARTICULARLY FOR THE DISTRIBUTION OF THE PRODUCT FROM A CELLULOSE BLEACHING TOWER
EP0430832A1 (en) * 1989-12-01 1991-06-05 Pignat S.A. Metering feeding for powdered, granular, party products or the like
FR2655319A1 (en) * 1989-12-01 1991-06-07 Pignat Sa INTRODUCER-DOSER FOR POWDERY PRODUCTS, GRANULES, PASTY OR SIMILAR.

Similar Documents

Publication Publication Date Title
US3182825A (en) Apparatus for transfer of a powdered or granular material from a space under low pressure into a space under high pressure
US2793914A (en) Apparatus for transporting finely divided solid materials in carrier gas streams
US4097092A (en) Disperser
US3158362A (en) Method of blending granular materials
US4247240A (en) Solids feeder having a solids-liquid separator
PL111707B1 (en) Process for pressure gasification of dust fuels and apparatus therefor
US3921831A (en) Device for distributing raw materials into blast furnace
US4027920A (en) Distributor
US5095825A (en) Method and apparatus for feeding fuel into a pressurized space
GB2089330A (en) Discharging storage containers
US20110049198A1 (en) Rotary feeders, rotor assemblies for rotary feeders and related methods
US10294030B2 (en) Dew condensation prevention device for discharge chute, and particulate feeding device using same
US3302805A (en) Materials distributor of a blast furnace
US2802698A (en) Material feed regulator
US4128343A (en) Apparatus for blending granular materials
US4067452A (en) Charging apparatus for receptacle
US4405340A (en) Process and apparatus for charging solid fuels into a fixed-bed gasifier
US2559557A (en) Aerating feeding of pulverized materials
US2984521A (en) Method and apparatus for blending flour or other pulverulent material
US4049133A (en) Process and apparatus for the supply of a dry, free-flowing coal powder to a high-pressure coal gasification reactor
US2663465A (en) Apparatus for handling finely divided solid materials
US3084001A (en) Discharge means for storage vessels
CN1009452B (en) Ejection arrangments for granular material stockhouse
US4384704A (en) Cargo valve
US3311421A (en) Device for the continuous pneumatic feeding of powdered or granular material