US3912015A - System for the safe handling of pulverized coal - Google Patents

System for the safe handling of pulverized coal Download PDF

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Publication number
US3912015A
US3912015A US480013A US48001374A US3912015A US 3912015 A US3912015 A US 3912015A US 480013 A US480013 A US 480013A US 48001374 A US48001374 A US 48001374A US 3912015 A US3912015 A US 3912015A
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United States
Prior art keywords
explosion
extinguishers
separator
pulverizing
coal
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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
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US480013A
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English (en)
Inventor
Allen K Garbee
John A Honaker
James R Sexton
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Armco Steel Co LP
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Armco Inc
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Publication date
Application filed by Armco Inc filed Critical Armco Inc
Priority to US480013A priority Critical patent/US3912015A/en
Priority to CA227,077A priority patent/CA1061306A/en
Priority to AU81325/75A priority patent/AU501509B2/en
Priority to ZA00753235A priority patent/ZA753235B/xx
Priority to GB21826/75A priority patent/GB1508494A/en
Priority to IT49934/75A priority patent/IT1035953B/it
Priority to DE2526126A priority patent/DE2526126C2/de
Priority to BE157220A priority patent/BE830105A/xx
Priority to YU1509/75A priority patent/YU37272B/xx
Priority to JP50070285A priority patent/JPS5835239B2/ja
Priority to NL7507061A priority patent/NL7507061A/xx
Priority to PL1975181223A priority patent/PL118707B1/pl
Priority to FR7518800A priority patent/FR2274530A1/fr
Priority to BR4850/75D priority patent/BR7503769A/pt
Priority to CS754252A priority patent/CS212747B2/cs
Priority to ES438636A priority patent/ES438636A1/es
Application granted granted Critical
Publication of US3912015A publication Critical patent/US3912015A/en
Assigned to ARMCO STEEL COMPANY, L.P., A DE LIMITED PARTNERSHIP reassignment ARMCO STEEL COMPANY, L.P., A DE LIMITED PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARMCO INC., A CORP. OF OHIO
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Expired - Lifetime 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
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • 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
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/10—Obtaining an average product from stored bulk material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B31/00—Charging devices

Definitions

  • ABSTRACT A system for the safe handling of pulverized coal, which system includes conventional coal pulverizing &
  • explosion suppression and fire suppression systems both of which latter systems include conventional components. All three of these systems (coal preparation, explosion suppression and fire suppression) are so combined as to effect the grinding of raw coal whereby to dry and collect the pulverized coal in a oxygen containing atmosphere without property loss due to explosion or fire.
  • a number of explosion detectors and associated extinguishers are strategically located throughout the coal preparation system so that when pressures slightly above operating pressure begin to develop, the explosion extinguishers will be actuated not only to suppress the explosion but also simultaneously to shut down the coal preparation system.
  • fire detectors and associated extinguishers are also strategically located throughout the system so that when temperatures slightly above process temperature are sensed the extinguishers will immediately act to suppress the fire and simultaneously shut down the coal preparation system.
  • the fire suppression system will go into actuation prior to the explosion suppression system and when this happens, the explosion suppression system may be shut down manually if the operator decides it will not be needed, whereby to avoid the expense of having to reload the explosion suppression system.
  • the system for the safe handling of pulverized coal may be used as the coal preparation part of a blast furnace coal injection system, or in other arrangements wherein pulverized coal is to be a reactant; it may also be used in a coal gasification system.
  • the system is de signed for use when pulverizing, drying and collecting coal in an oxidizing atmosphere that could support an explosion or a fire.
  • Bag filters may be used in these coal preparation systems and such filters are especially prone to explosions and/or fires because coal can accumulate in the bag filter and spontaneously ignite.
  • coal pulverizing has been done without the benefit of fire'and explosion protection.
  • Most conventional applications feed the finely divided coal directly to burners or combustion chambers.
  • the conveying air is used as all or part of the air required to burn the coal.
  • premature ignition does not cause explosions if the velocity of the conveying air of kept above the flame propagation velocity for pulverized coal.
  • Burning coal particles are simply blown into the combustion chamber. In those applications to which the instant system is directed, however, the burning particles could enter the bag filter or storage vessel and cause an explosion or a fire.
  • the proposed system is designed to prevent such explosions or fires.
  • the invention herein lies in combining the known Fenwal components into a single process system for safe operation of a coal grinding and collecting stream; similarly, the known Cardox components may also be incorporated into this system. It is to the strategic locations of the various detectors and extinguishers in 'the coal grinding and collecting stream that the invendown, but also the Fenwal components may not be actuated, depending on the circumstances, thus saving the cost of having to replace the bromochloromethane or the like. If, however, the explosion is the first event to be sensed, the Fenwal extinguishers will, of
  • the drawing consists of a single schematic diagram of a coal preparation system to which the explosion components and fire components have been applied.
  • a typical coal preparation system to which the instant system for the safe handling of pulverized coal may be applied may be comprised of a raw coal storage bunker 10 having feeder means 11 for directing the raw coal lumps into a pulverizer 12 through a duct 13.
  • Coal feed means 13a may be employed to insure properly controlled feeding of the pulverizer 12.
  • means generally indicated at 14 are provided by means of which hot air is directed into the pulverizer 12.
  • the means 14 may, for example, be comprised of a fan and a direct fired heater.
  • the pulverizer 12 and heater 14 to regulate the temperature of the air in the pulverizer in accordance with, among other things, the moisture content of the lump coal going into the pulverizer. Typically such content may be in the neighborhood of 6%. Generally it is desirable to have the coal particles leaving the pulverizer to have a low amount of surface moisture, a content in the neighborhood of one/half percent. It is desirable that the particles leaving the pulverizer have 80% thereof which will pass through 200 mesh grid; this means that the pulverizer coal particles will have a texture similar to common face powder. It is because of the dust-like nature of the pulverized coal, and the presence of an atmosphere that can support combustion, that explosion and fire hazards exist in the system.
  • the pulverized coal leaves the pulverizer 12 through a coal pipe 15 to a cyclone separator 16.
  • a cyclone separator 16 typically, of the coal powders introduced into the known cyclone separator 16 will be discharged directly into the coal storage tank 17 via the duct 18.
  • the fines, constituting the remaining 10% of the pulverized coal entering the cyclone separator 16 exit via the duct 19 into a pair of bag filters or the like 20 and 21 through the duct extensions 19a and 19b.
  • the fines thus separated and collected in the filters 20 and 21 are discharged into the coal storage tank 17 via the ducts 22 and 23.
  • the instant invention is the protection of that part of the coal separation system so far described from damage due to either explosion or fire. What happens to the coal after it is collected in the storage tank 17 is not of vital importance to the invention.
  • such coal may be directed via ducts 24 and 25 to coal tanks 26 and 27 having discharge conduits 28 and 29 directed to the feed means for a blast furnace and the like, not shown.
  • the coal from the storage tank or reservoir 17 may be led therefrom via the conduit 30 to a tank 31 which may be connected to a coal gasification system, not shown.
  • coal pulverizing process accomplished by the apparatus so far described, relatively wet lump coal from the bunker is fed by the means 11 into a coal pulverizer 12 which ia a classifier (not shown) located in the top section of the pulverizer.
  • the ground coal is air-conveyed by conventional means, also not shown, under positive pressure out of the mill 12 through the duct 15 which typically may be a 30" diameter pipe for a distance which typically would be in the neighborhood of approximately 130 into the cyclone 16 for further distribution into the process.
  • the outlet side of the cyclone 16 is connected to two bag collectors 20 and 21 which typically may be located approximately 40' from the top portion of the cyclone. (Although a positive pressure system is described herein, it will be understood by those skilled in the art that a negative pressure system could be employed.)
  • the protection provided by this invention starts with the pulverizer 12 and includes the interconnecting ductwork to the cyclone outlet and the two dust collector hoppers 20 and 21.
  • the explosion detection portion of this system is comprised of pressure-sensitive explosion detectors that will respond to the pressure wave generated during an incipient explosion.
  • the detector will, in turn, complete a circuit through the power unit to actuate each high-rate discharge extinguisher electrically connected to the power unit.
  • the sensing devices and extinguishers are well known as illustrated by the Fenwal devices available in the marketplace. Proper location of these known devices, however, in the coal preparation system is believed novel and of much importance. A detailed description, therefore, of the means interconnecting the detectors and the extinguishers, whether they be of the Fenwal type for suppressing explosions, or of the Cardox type for extinguishing fires, will now be depicted in detail.
  • the first explosion detector 32 is located in connection with the outlet duct 15 of the pulverizer 12; in actual practice, this would be approximately I inch from the pulverizer.
  • the second explosion detector 33 is also located on the outlet duct but further up from the mill 12; in actual practice, this duct 33 would be approximately inches from the mill 12.
  • the third explosion detector 34 is located near the top of the air conveyor duct or coal pipe 15 and in practice this would be at a distance of approximately 100 inches from the mill 12.
  • the fourth detector 35 is located on the outlet duct 19 of the cyclone 16.
  • the fifth and sixth detectors 36 and 37 are located on the inlet ducts 19a and 19b to the dust collectors represented by the bag filters generally indicated at 20 and 21.
  • the seventh and eighth explosion detectors 38 and 39 may be located on the dust collectors 20 and 21 at the inlet side thereof above the floor grading and at the base of the filtering box (not shown).
  • a first extinguisher 40 is located above the coal pulverizer or mill l2 and releases its agent down the outlet duct 15 and into the pulverizer 12. Typically this would be a l0-liter high-rate discharge extinguisher 40.
  • a second high-rate discharge extinguisher 41 is located somewhat further from the mill l2 and is oriented so as to release its agent down the duct 15 toward the pulverizer 12. In practice, this may be a 5-liter extinguisher.
  • Third and fourth explosion extinguisher 42 and 43 are located towards the top end of the coal pipe or air conveyor 15 and are oriented so that both of these extinguishers 42 and 43 direct their agent down the duct 15 towards the pulverizer 12. typically these extinguishers may be of l0-liter capacity.
  • a fifth explosion extinguisher 44 is mounted on its top section behind the outlet duct 19; in practice, this would normally be a 5-liter high-rate discharge extinguisher.
  • This extinguisher 44 releases its agent into the cyclone 16 through a spreader assembly (not shown) which distributes the agent into the cyclonic air.
  • a sixth explosion extinguisher is located on the outlet duct 19 of the cyclone 16 and releases it agent down the duct to the interior portion of the cyclone. In practice this extinguisher 45 may also be of 5-liter capacity.
  • Seventh and eighth extinguishers 46 and 47 are located on the feed ducts 19a and 19b of each of the two dust collectors 20 and 21. These extinguishers 46 and 47 are mounted on the ducts and release their agent down the ducts 19a and 19b to the dust collectors 20 and 21. Typically these extinguishers 46 and 47 may be of 5-liter capacity. In the hopper of each dust collector 20 and 21, there are located ninth and tenth extinguishers 48 and 49.
  • each of these extinguishers 48 and 49 is located under the floor grading (not shown) so as to release its agent into its respective hopper through a spreader assembly (also not shown) which will distribute the agent into a cone of In practice, these extinguishers 48 and 49 are of l0-liter capacity.
  • eleventh and twelth explosion extinguishers are located above the floor grading so as to release their agent into the respective collector 20 and 21. In practice it is preferred that these be of approximately 30-liter capacity. These extinguishers 50 and 51 may also be used to provide fire suppression and advance inerting in the bag house portion of the collectors 20 and 21.
  • the extinguishing agent used in these twelve extinguishers 40 through 51 may be bromochloromethane or equivalent substance.
  • the mechanism by which these agents act to arrest combustion may be one of chemical inhibition. Inasmuch as combustion seems to be a chemical reaction, it is dependent upon certain radicals in the pre-flame zone to branch these chains, thereby substaining an advancing flame front.
  • the halogenated hydrocarbons, such as bromochloromethane and bromotrifluoromethane react with these radicals, thereby terminating the chains.
  • a first sensor 61 is located in connection with the pulverizer or mill 12.
  • a second sensor 62 is associated with the cyclone 16 via its outlet duct 19.
  • Third and fourth sensors 63 and 64 are provided in association with the filters 20 and 21. These four sensors 61 through 64 protect the main parts of the coal handling system from fire via, of course, the extinguishers to which they are operatively connected.
  • fifth and sixth sensors 65 and 66 are provided towards the top and discharge ends of the coal storage tank 17 and are arranged to be sensitive to fire not only in such tank but also in the auxiliary systems represented by the reference numerals 26, 27 and 31.
  • the fire extinguishers for protecting the system may be located in the following manner. Three are shown as being associated with the pulverizer 12 as indicated at 71, 72 and 73. A fourth extinguisher is associated with the cyclone 16 as indicated at 74. Four more extinguishers 75, 76, 77 and 78 are located within the bag house filters 20 and 21 as indicated. Ninth, tenth and eleventh extinguishers 79, 80 and 81 may be associated with the coal storage tank 17 while the final three extinguishers 82, 83 and 84 may be associated with the auxiliary systems designated by the reference numerals 26, 27 and 31.
  • the six sensors 61 through 66 are operatively connected with the 14 extinguishers 71 through 84 in conventional manner. The details of these connections, therefore, are again only schematically illustrated in the drawing and accompanying description. The actual operation of these devices is not the point of novelty herein but rather it is their specific location in the coal preparation system that is of importance. It will be further understood that the six sensors 61 through 66 are also tied into the means which actuate the coal preparation system so that upon actuation of any one of the sensors the complete system will be shut down.
  • pulverized coal discharged from the mill 12 may be in the neighborhood of 155F while the heated air in the bag filters 20 and 21 may be in the neighborhood of 1 10 to F.
  • These temperatures are needed to insure the removal of surface moisture from the coal particles. It is also these temperatures, therefore, which render the system subject to explosion and fire and, of course, the invention is directed to suppressing such events before they really get started.
  • a typical coal preparation system may operate on 10 to 16 tons per hour and the temperature blown into the pulverizer 12 will depend on ambient air temperture, the moisture of the coal and the amount of coal. When large quantities of relavely moist coal are employed, hotter air must be forced into the pulverizing unit.
  • the normal pressure level in the coal preparation system if first determined.
  • the eight sensors 32 through 39 are then set to be sensitive to a pressure slightly higher then the normal operating process pressure. When such higher pressures are sensed, the explosion extinguishers are actuated.
  • the normal operating temperature of the coal preparation system is determined and the six sensors 61 through 66 are set so as to be sensitive to temperatures slightly above process temperatures whereupon the fire extinguishers will be actuated to shoot, for example, carbon dioxide into the system.
  • these fire extinguishers will operate to eliminate a source of ignition thereby preventing an explosion as well as to suppress fire, and in such arrangement actuation of the fire sensors and extinguishers may deactivate the explosion suppression system so as to render unnecessary reloading of such latter system; in any event, the operator may do this manually if circumstances warrant it.
  • Manually operated fire extinguishers may be located throughout the system as desired. Three such of these have been indicated at 91, 92 and 93 in association with the coal bunker 10, the storage tank 17, and the auxiliary systems 26, 27, 31. Even when a substantially inert gas such as CO plus nitrogen is employed, such as in the storage tank and auxiliary systems, there may be some oxygen present. If this gas is kept relatively low in oxygen content, about one-half percent, dangers are minimal; but as the oxygen content passes 6 to 8 percent, dangers become magnified. These additional Cardox extinguishers 91-93, therefore, provide an extra measure of safety.
  • a substantially inert gas such as CO plus nitrogen
  • a system for the safe handling of pulverized coal including: loading means for feeding raw coal into the system; pulverizing means to grind and heat lump coal received from the loading means to a dry powder condition; separator means to divide out the fines; a coal powder storage tank; filter means; first duct means connecting the pulverizing means to the separator means; second duct means connecting the separator means directly to the storage tank; third duct means connecting the separator means to the filter means; fourth duct means connecting the filter means to the storage tank; a plurality of explosion detectors; a plurality of explosion extinguishers; means interconnecting said explosion detectors and said explosion extinguishers so that when pressures above normal operating pressures develop said explosion extinguishers will be actuated; a said explosion detector in close association with said pulverizing means and a said explosion extinguisher for discharging explosion suppression agent into said pulverizing means; a said explosion detector in close association with said separator means and a said explosion extinguisher for discharging
  • the system of claim 1 including a plurality of fire detectors; a plurality of fire extinguishers; means interconnecting said fire detectors and said fire extinguishers so that when temperatures above normal operating temperatures develop said fire extinguishers will be actuated; and means interconnecting said fire detectors with said loading means, said pulverizing means and said separator means so that when said fire extinguishers are actuated said loading means, said pulverizing means and said separator means are simultaneously inactivated whereby to shut down the system.
  • the system of claim 4 including an additional explosion extinguisher for said cyclone separator, one said explosion extinguisher being located in said third duct means and being directed towards said separator, the other of said explosion extinguishers being located in said cyclone separaton 6.
  • the system of claim 4 including two additional explosion extinguishers for each of said bag filters whereby there are three said explosion extinguishers for each said filter, two of said three explosion extinguishers being located in each of said bag filters and the other of said three explosion extinguishers being located in the said duct means extending from said cyclone separator to each said bag filter and being directed to a respective said bag filter.
  • a system for the safe handling of pulverized coal including; loading means for feeding raw coal into the system; pulverizing means to grind and heat lump coal received from the loading means to a dry powder condition; separator means to divide out the fines; a coal powder storage tank; filter means; first duct means connecting the pulverizing means to the separator means; second duct means connecting the separator means directly to the storage tank; third duct means connecting the separator means to the filter means; fourth duct means connecting the filter means to the storage tank; a plurality of explosion detectors; a plurality of explosion extinguishers; means interconnecting said explosion detectors and said explosion extinguishers so that when pressures above normal operating pressures develop said explosion extinguishers will be actuated; said separator means comprising a cyclone separator; said filter means comprising a pair of bag filter; said third duct means comprising two branch ducts, each of said branch ducts extending from said cyclone separator to respective ones of said bag filters; there being eight of
  • a system for the safe handling of pulverized coal including: loading means for feeding raw coal into the system; pulverizing means to grind and heat lump coal received from the loading means to a dry powder condition; separator means to divide out the fines; a coal powder storage tank; filter means; first duct means connecting the pulverizing means to the separator means; second duct means connecting the separator means directly to the storage tank; third duct means connecting the separator means to the filter means; fourth duct means connecting the filter means to the storage tank;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Business, Economics & Management (AREA)
  • Combustion & Propulsion (AREA)
  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Emergency Management (AREA)
  • Organic Chemistry (AREA)
  • Disintegrating Or Milling (AREA)
  • Coke Industry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Cyclones (AREA)
  • Drying Of Solid Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Air Transport Of Granular Materials (AREA)
US480013A 1974-06-17 1974-06-17 System for the safe handling of pulverized coal Expired - Lifetime US3912015A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US480013A US3912015A (en) 1974-06-17 1974-06-17 System for the safe handling of pulverized coal
CA227,077A CA1061306A (en) 1974-06-17 1975-05-15 System for the safe handling of pulverized coal
AU81325/75A AU501509B2 (en) 1974-06-17 1975-05-20 Pulverizing coal
ZA00753235A ZA753235B (en) 1974-06-17 1975-05-20 A system for the safe handling of pulverized coal
GB21826/75A GB1508494A (en) 1974-06-17 1975-05-21 System for the safe handling of pulverized coal
IT49934/75A IT1035953B (it) 1974-06-17 1975-06-05 Perfezionamento negli impianti per la manipolazione sicuradi polverino di carbone in atmosfera ossidante
YU1509/75A YU37272B (en) 1974-06-17 1975-06-11 Device for a safe manipulation of powdered coal
BE157220A BE830105A (fr) 1974-06-17 1975-06-11 Systeme pour la manutention, dans des conditions de securite, du charbon pulverise
DE2526126A DE2526126C2 (de) 1974-06-17 1975-06-11 System für die sichere Handhabung von Kohlenstaub
JP50070285A JPS5835239B2 (ja) 1974-06-17 1975-06-12 ビフンタンノ アンゼントリアツカイノタメノソウチ
NL7507061A NL7507061A (nl) 1974-06-17 1975-06-13 Systeem voor het veilig behandelen van verpulver- de kolen.
PL1975181223A PL118707B1 (en) 1974-06-17 1975-06-14 Coal treatment apparatus
FR7518800A FR2274530A1 (fr) 1974-06-17 1975-06-16 Perfectionnements aux installations de manutention de charbon pulverise
BR4850/75D BR7503769A (pt) 1974-06-17 1975-06-16 Sistema para o manuseio com seguranca de carvao pulverizado
CS754252A CS212747B2 (en) 1974-06-17 1975-06-17 Apparatus for safe manipulation of powdered coal
ES438636A ES438636A1 (es) 1974-06-17 1975-06-17 Perfeccionamientos en sistemas para el manejo seguro de car-bon pulverizado en instalaciones industriales.

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Application Number Priority Date Filing Date Title
US480013A US3912015A (en) 1974-06-17 1974-06-17 System for the safe handling of pulverized coal

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US3912015A true US3912015A (en) 1975-10-14

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US480013A Expired - Lifetime US3912015A (en) 1974-06-17 1974-06-17 System for the safe handling of pulverized coal

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US (1) US3912015A (cs)
JP (1) JPS5835239B2 (cs)
AU (1) AU501509B2 (cs)
BE (1) BE830105A (cs)
BR (1) BR7503769A (cs)
CA (1) CA1061306A (cs)
CS (1) CS212747B2 (cs)
DE (1) DE2526126C2 (cs)
ES (1) ES438636A1 (cs)
FR (1) FR2274530A1 (cs)
GB (1) GB1508494A (cs)
IT (1) IT1035953B (cs)
NL (1) NL7507061A (cs)
PL (1) PL118707B1 (cs)
YU (1) YU37272B (cs)
ZA (1) ZA753235B (cs)

Cited By (18)

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EP0019408A1 (en) * 1979-05-07 1980-11-26 The Cleveland-Cliffs Iron Company Method of inhibiting explosions in a pulverizing system
US4267889A (en) * 1978-12-27 1981-05-19 Williams Robert M Explosion suppression system for fire or explosion susceptible enclosure
US4321096A (en) * 1980-12-16 1982-03-23 John B. Pike & Son, Inc. Apparatus and method for cleaning an explosion sensing port
US4637473A (en) * 1986-01-16 1987-01-20 Kidde, Inc. Fire suppression system
US4754932A (en) * 1987-03-18 1988-07-05 Combustion Engineering, Inc. Coal pulverizer inerting and fire extinguishing system
US4972998A (en) * 1989-07-24 1990-11-27 Smith & Mahoney, P.C. Method and system for preventing explosions within a solid waste disposal facility
US5137218A (en) * 1991-08-26 1992-08-11 Western Farmers Electric Cooperative Pulverizer for reducing the possibility of explosions
US5607021A (en) * 1995-06-08 1997-03-04 Weyerhaeuser Company Fire suppression system
US5839673A (en) * 1996-09-10 1998-11-24 Williams; Robert M. Apparatus for grinding material
US20070297881A1 (en) * 2004-08-06 2007-12-27 Mario Magaldi Dry Mechanical Conveyor Plant for Pyrites and Coal Dust
CN102940940A (zh) * 2012-10-31 2013-02-27 中国石油化工股份有限公司 温度压力双重控制抑制爆炸装置和石油化工安全反应设备
US20140263772A1 (en) * 2013-03-15 2014-09-18 Alstom Technology Ltd Pulverizer monitoring
US20150238787A1 (en) * 2012-08-27 2015-08-27 Stuvex International Nv Valve Device and Method for Preventing Explosion Propagation
CN104888384A (zh) * 2015-06-11 2015-09-09 中国神华能源股份有限公司 原煤斗存煤自燃预警与防火系统
US9421551B2 (en) 2012-05-01 2016-08-23 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
US9604226B2 (en) 2012-05-01 2017-03-28 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
CN110081455A (zh) * 2019-05-15 2019-08-02 金方圆安全技术研究院（苏州）有限公司 一种煤粉制备控爆集成保护系统
US20230233891A1 (en) * 2022-01-27 2023-07-27 Black Card Emergency Solutions, LLC Fire Extinguishing Assembly

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526519B2 (cs) * 1972-10-10 1980-07-14
FR2501833B1 (fr) * 1981-03-10 1985-05-31 Stein Industrie Dispositif d'introduction et de combustion d'un combustible solide pulverise dans une enceinte sous pression
IN166429B (cs) * 1986-04-29 1990-05-05 Babcock & Wilcox Co
RU2255808C1 (ru) * 2003-12-26 2005-07-10 Восточно-Сибирский государственный технологический университет Вихревой аппарат для охлаждения сыпучих материалов
RU2337595C1 (ru) * 2007-01-09 2008-11-10 Государственное образовательное учреждение высшего профессионального образования Восточно-Сибирский государственный технологический университет Вихревой аппарат для охлаждения сыпучих материалов
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US4267889A (en) * 1978-12-27 1981-05-19 Williams Robert M Explosion suppression system for fire or explosion susceptible enclosure
EP0019408A1 (en) * 1979-05-07 1980-11-26 The Cleveland-Cliffs Iron Company Method of inhibiting explosions in a pulverizing system
US4321096A (en) * 1980-12-16 1982-03-23 John B. Pike & Son, Inc. Apparatus and method for cleaning an explosion sensing port
US4637473A (en) * 1986-01-16 1987-01-20 Kidde, Inc. Fire suppression system
US4754932A (en) * 1987-03-18 1988-07-05 Combustion Engineering, Inc. Coal pulverizer inerting and fire extinguishing system
AU592287B2 (en) * 1987-03-18 1990-01-04 Combustion Engineering Inc. Coal pulverizer inerting and fire extinguishing system
US4972998A (en) * 1989-07-24 1990-11-27 Smith & Mahoney, P.C. Method and system for preventing explosions within a solid waste disposal facility
US5137218A (en) * 1991-08-26 1992-08-11 Western Farmers Electric Cooperative Pulverizer for reducing the possibility of explosions
US5607021A (en) * 1995-06-08 1997-03-04 Weyerhaeuser Company Fire suppression system
US5839673A (en) * 1996-09-10 1998-11-24 Williams; Robert M. Apparatus for grinding material
US20070297881A1 (en) * 2004-08-06 2007-12-27 Mario Magaldi Dry Mechanical Conveyor Plant for Pyrites and Coal Dust
US8371794B2 (en) * 2004-08-06 2013-02-12 Magaldi Power S.P.A. Dry mechanical conveyor plant for pyrites and coal dust
US9604226B2 (en) 2012-05-01 2017-03-28 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
US9421551B2 (en) 2012-05-01 2016-08-23 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
US9452303B2 (en) * 2012-08-27 2016-09-27 Sturvek International NV Valve device and method for preventing explosion propagation
US20150238787A1 (en) * 2012-08-27 2015-08-27 Stuvex International Nv Valve Device and Method for Preventing Explosion Propagation
CN102940940B (zh) * 2012-10-31 2015-05-06 中国石油化工股份有限公司 温度压力双重控制抑制爆炸装置和石油化工安全反应设备
CN102940940A (zh) * 2012-10-31 2013-02-27 中国石油化工股份有限公司 温度压力双重控制抑制爆炸装置和石油化工安全反应设备
US20140263772A1 (en) * 2013-03-15 2014-09-18 Alstom Technology Ltd Pulverizer monitoring
US9494319B2 (en) * 2013-03-15 2016-11-15 General Electric Technology Gmbh Pulverizer monitoring
CN104888384A (zh) * 2015-06-11 2015-09-09 中国神华能源股份有限公司 原煤斗存煤自燃预警与防火系统
CN110081455A (zh) * 2019-05-15 2019-08-02 金方圆安全技术研究院（苏州）有限公司 一种煤粉制备控爆集成保护系统
US20230233891A1 (en) * 2022-01-27 2023-07-27 Black Card Emergency Solutions, LLC Fire Extinguishing Assembly
US12109443B2 (en) * 2022-01-27 2024-10-08 Black Card Emergency Solutions, LLC Fire extinguishing assembly

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IT1035953B (it) 1979-10-20
AU501509B2 (en) 1979-06-21
AU8132575A (en) 1976-11-25
YU37272B (en) 1984-08-31
FR2274530B1 (cs) 1977-07-22
ES438636A1 (es) 1977-03-01
YU150975A (en) 1983-04-27
NL7507061A (nl) 1975-12-19
CS212747B2 (en) 1982-03-26
PL118707B1 (en) 1981-10-31
DE2526126C2 (de) 1986-03-27
FR2274530A1 (fr) 1976-01-09
ZA753235B (en) 1976-04-28
GB1508494A (en) 1978-04-26
JPS519104A (en) 1976-01-24
JPS5835239B2 (ja) 1983-08-01
DE2526126A1 (de) 1976-01-02
BE830105A (fr) 1975-10-01
CA1061306A (en) 1979-08-28
BR7503769A (pt) 1976-07-06

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