EP0504581A2 - Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe - Google Patents

Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe Download PDF

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Publication number
EP0504581A2
EP0504581A2 EP92102168A EP92102168A EP0504581A2 EP 0504581 A2 EP0504581 A2 EP 0504581A2 EP 92102168 A EP92102168 A EP 92102168A EP 92102168 A EP92102168 A EP 92102168A EP 0504581 A2 EP0504581 A2 EP 0504581A2
Authority
EP
European Patent Office
Prior art keywords
airlock
coal
silo
depressurization
gas
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.)
Granted
Application number
EP92102168A
Other languages
English (en)
French (fr)
Other versions
EP0504581A3 (en
EP0504581B1 (de
Inventor
Louis Schmit
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0504581A2 publication Critical patent/EP0504581A2/de
Publication of EP0504581A3 publication Critical patent/EP0504581A3/fr
Application granted granted Critical
Publication of EP0504581B1 publication Critical patent/EP0504581B1/de
Anticipated expiration legal-status Critical
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
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S48/00—Gas: heating and illuminating
    • Y10S48/04—Powdered fuel injection

Definitions

  • the present invention relates to a method for treating powdered coal in a solid fuel injection installation, comprising a silo for storing powdered coal, at least one airlock connected to the pneumatic coal transport circuit, at least one filtering screen connected between each airlock and the silo, a source of inert gas under pressure for the pressurization of each airlock and the formation of the pneumatic propulsion current of the coal and a circuit for pressure equalization and depressurization of each airlock through a filter.
  • the invention also relates to a device for implementing this method.
  • the humidity level poses a number of problems in the storage silo.
  • the drying gas accumulates a large quantity of water vapor which, as it cools in the silo, condenses above the mass and is responsible for agglomeration. and encrusting the coal powder.
  • the object of the present invention is to provide a new process and a new device in which the risks of condensation of water vapor are significantly reduced.
  • the process proposed by the present invention is essentially characterized in that the major part of the inert depressurization gas of each airlock is subjected to a filtration operation before being injected into the bottom of the storage silo in the mass of coal and to be released through a filter at the top of the silo above the level of coal and in that the residual part of the inert depressurization gas is deflected directly towards the top of the storage silo.
  • the filtration operation preferably includes a dynamic filtration phase and a static filtration phase.
  • the filtration means can be purged and cleaned with inert gas which, at the outlet of the filtration means, is directed through the screen (s) with the carbon powder in the airlock (s) during their filling.
  • the invention allows advantageous use to be made of the availability of this fairly dry and inert gas to improve the thermal and hygrometric conditions in the silo, both within the mass of coal and above it. In fact, by injecting this inert gas under pressure into the bottom of the silo, a multiple beneficial effect is achieved.
  • the passage of gas through the mass of the coal powder also has a beneficial effect on its consistency, thanks to its loosening action.
  • the device for implementing the invention is characterized in that the pressure equalization and depressurization circuit of each airlock comprises a primary circuit connecting the top of the storage silo to each airlock and a secondary circuit connecting the bottom from the storage silo, through a filtration station, to each airlock.
  • the filtration station may include a cyclone and a filter plate. Both the cyclone and the filter plate can be connected to at least one screen on the one hand and to an inert gas cleaning circuit on the other.
  • References 2 and 4 designate two airlocks operating alternately to lock powdered coal in a pneumatic transport pipe 6 under the action of a gas. of inert propulsion injected, under pressure, into each airlock 2 and 4 from one or two sources of pressurized gas not shown and whose pressure is measured and monitored by pressure sensors 8, 10.
  • the airlocks 2 and 4 are supplied with coal powder from a storage silo 12 through screens 14, 16 containing means for filtering the coal powder.
  • each of the airlocks 2, 4 is connected through a primary circuit 18, 20 to the top of the storage silo 12 where the aeration is carried out through a filter 22 located on the silo 12.
  • each of the two airlocks is also connected through a secondary circuit 24 at the bottom of the silo 12.
  • This secondary circuit 24 passes through a filtration station which may consist of a cyclone 26 and a filter plate 28.
  • the cyclone 26 and the filter plate 28 can be connected by the opening of a valve 30 to a source of inert gas 32 intended for cleaning the cyclone 26 and the filter plate 28.
  • the cyclone 26 and the filter plate 28 can also be put in communication with one or both screens 14, 16 by the opening of valves 34, 36, which makes it possible to use the cleaning residues by sending them in the screen 14 (and / or in the screen 16 ) and use the pressure of the cleaning gas as a propellant to facilitate filling the airlocks 2 and 4.
  • When cleaning the filtration station it is disconnected from the silo 12 by closing a valve 38.
  • the two airlocks can be connected to their depressurization circuit 18, 20, 24 by automatic closing valves 40, 42 while the control of the operation of the primary and secondary circuits is carried out by automatic adjustment valves 44, 46, d 'a part and the automatic adjustment valve 48 in the secondary circuit 24, on the other hand.
  • These valves 44, 46, 48 are valves the opening of which is adjusted automatically as a function of the pressure detected by the sensors 8 or 10 to ensure a determined and constant flow.
  • the remains of coal powder entrained by the gas in the secondary circuit 24 are, in part, deposited in the cyclone 26 and, in part, retained by the filter plate 28, while the inert gas, freed of remains of coal powder, is injected from the bottom into silo 12 to purge the water vapor.
  • This injection is carried out through non-return sieves, not shown, incorporated in the wall of the silo 12 and capable of letting the gas pass and retaining the coal powder.
  • These non-return screens therefore prevent the powder from leaving the silo 12 towards the circuit 24 and at the same time ensure a good distribution in the silo 12 of the depressurization gas coming from the circuit 24.
  • the valve 48 is designed to be closed automatically when the pressure of the depressurization gas falls below a predetermined threshold corresponding to the minimum pressure required to pass through the secondary circuit 24 and the mass of coal in the silo 12.
  • the valve 44 is designed to be opened automatically by the sensor 8 at this same pressure, so that the airlock 2 is automatically switched from the secondary circuit 24 to the primary circuit 18 and that the residual part of inert gas at low pressure is deflected towards the top of the silo 12 to be released through the filter 22.
  • the airlock 2 is completely depressurized, it is disconnected from the two circuits 18 and 24 by closing the valve 40. From this moment can begin filling the airlock by opening valves, not shown, in the pipe connecting the airlock 2 to the silo 12.
  • the remains of coal powder entrained by the rinsing gas in the cyclone 26 and the filter plate 28 are then mixed with the coal powder flowing from the silo 12 into the tank 14.
  • the airlock 2 When the airlock 2 is full, it can be disconnected from the intermediate reservoir 14 and connected to the pneumatic transport line 6, while the empty airlock 4 undergoes the depressurization and filling operations as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP92102168A 1991-03-20 1992-02-10 Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe Expired - Lifetime EP0504581B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87910 1991-03-20
LU87910A LU87910A1 (fr) 1991-03-20 1991-03-20 Procede et dispositif de traitement de charbon en poudre dans une installation d'injection de combustibles solides

Publications (3)

Publication Number Publication Date
EP0504581A2 true EP0504581A2 (de) 1992-09-23
EP0504581A3 EP0504581A3 (en) 1993-01-27
EP0504581B1 EP0504581B1 (de) 1995-03-29

Family

ID=19731284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102168A Expired - Lifetime EP0504581B1 (de) 1991-03-20 1992-02-10 Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe

Country Status (9)

Country Link
US (1) US5284187A (de)
EP (1) EP0504581B1 (de)
CA (1) CA2063279C (de)
DE (1) DE69201812T2 (de)
ES (1) ES2073199T3 (de)
LU (1) LU87910A1 (de)
RU (1) RU2062951C1 (de)
UA (1) UA25927C2 (de)
ZA (1) ZA921662B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162306A (zh) * 2011-12-14 2013-06-19 佛山市国保节能环保技术有限公司 煤粉远程输送和燃烧系统

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7008459B1 (en) * 1997-04-09 2006-03-07 Arthur P. Fraas Pretreatment process to remove oxygen from coal en route to a coal pyolysis process as a means of improving the quality of the hydrocarbon liquid product
US6079461A (en) * 1998-08-17 2000-06-27 The Heil Co. Use of inert gas in transfer of comminuted product to tank
US6810929B1 (en) * 2003-06-12 2004-11-02 Ppg Industries Ohio, Inc. Transportable container for fluidizable material and method
TW200900421A (en) * 2006-10-10 2009-01-01 Univation Tech Llc Discharge system to remove solids from a vessel
FI124436B (fi) * 2008-03-18 2014-08-29 Maricap Oy Menetelmä ja laitteisto pneumaattisessa materiaalinsiirtojärjestelmässä
WO2012138702A1 (en) 2011-04-04 2012-10-11 Proven Engineering And Technologies, Llc Accurate dry bulk handling system and method of use
LU92916B1 (en) * 2015-12-17 2017-07-13 Wurth Paul Sa Grinding and drying plant
JP7039795B2 (ja) * 2018-02-23 2022-03-23 三菱重工業株式会社 粉体供給ホッパ加圧装置、ガス化炉設備およびガス化複合発電設備ならびに粉体供給ホッパ加圧装置の制御方法
CN111232453A (zh) * 2020-03-19 2020-06-05 马鞍山市天工科技股份有限公司 球形储煤仓智能防燃清堵装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775071A (en) * 1971-06-20 1973-11-27 Hydrocarbon Research Inc Method for feeding dry coal to superatmospheric pressure
DE2434526C2 (de) * 1974-07-18 1983-01-13 Shell Internationale Research Maatschappij B.V., 2501 's-Gravenhage Verfahren und Einrichtung zum Einführen feinzerteilten festen Brennstoffes in einen unter erhöhtem Druck stehenden Vergasungsraum
IN145376B (de) * 1975-12-02 1978-09-30 Babcock & Wilcox Co
US4153427A (en) * 1978-02-23 1979-05-08 The United States Of America As Represented By The United States Department Of Energy Apparatus and method for feeding coal into a coal gasifier
LU83701A1 (fr) * 1981-10-19 1983-06-08 Wurth Paul Sa Dispositif de controle du contenu et du remplissage d'un reservoir de distribution de matieres pulverulentes
FR2549580A1 (fr) * 1983-07-19 1985-01-25 Wurth Paul Sa Procede et dispositif pour l'injection de charbon pulverise dans un four industriel
LU86048A1 (fr) * 1985-08-21 1987-03-06 Wurth Paul Sa Dispositif pour l'injection pneumatique de matieres pulverulentes dans une enceinte sous pression et application a l'injection de combustibles solides dans un four a cuve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162306A (zh) * 2011-12-14 2013-06-19 佛山市国保节能环保技术有限公司 煤粉远程输送和燃烧系统

Also Published As

Publication number Publication date
EP0504581A3 (en) 1993-01-27
RU2062951C1 (ru) 1996-06-27
DE69201812T2 (de) 1995-08-10
ES2073199T3 (es) 1995-08-01
CA2063279C (fr) 2001-10-23
ZA921662B (en) 1993-01-27
LU87910A1 (fr) 1992-11-16
US5284187A (en) 1994-02-08
DE69201812D1 (de) 1995-05-04
UA25927C2 (uk) 1999-02-26
EP0504581B1 (de) 1995-03-29
CA2063279A1 (fr) 1992-09-21

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