WO2023007503A1 - Système de purge au n2 pour l'aération de soute à fines de charbon - Google Patents

Système de purge au n2 pour l'aération de soute à fines de charbon Download PDF

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Publication number
WO2023007503A1
WO2023007503A1 PCT/IN2021/050906 IN2021050906W WO2023007503A1 WO 2023007503 A1 WO2023007503 A1 WO 2023007503A1 IN 2021050906 W IN2021050906 W IN 2021050906W WO 2023007503 A1 WO2023007503 A1 WO 2023007503A1
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WO
WIPO (PCT)
Prior art keywords
valve
pressure
cylinder
user
coal bin
Prior art date
Application number
PCT/IN2021/050906
Other languages
English (en)
Inventor
Yogesh Kantilal DOSHI
Anthony Oliver
Original Assignee
Vimal Fire Controls Pvt 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 Vimal Fire Controls Pvt Ltd filed Critical Vimal Fire Controls Pvt Ltd
Publication of WO2023007503A1 publication Critical patent/WO2023007503A1/fr

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Classifications

    • 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
    • A62C3/04—Fire prevention, containment or extinguishing specially adapted for particular objects or places for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys
    • 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
    • A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment

Definitions

  • the present invention relates to an N 2 purging system for fine coal bin aeration Nitrogen gas Purging system for line Bin aeration using inject the low-pressure Nitrogen gas ime the Corti Bin Hopper tor rot Allow accommodate duel purlicki in lhe hopper portion for avoiding the wrong reading tif Ji fie rent m ⁇ mkoiiTi
  • Ihe coal grinding pnoceti is a process In which LXSBHS broken and its surface iffta Is continuously Increased, Coal In griHind into pulverized coal in a co&l nallL mainly by crushing, crushing und grinding.
  • oi pulverized eotil it is always dt ⁇ irabie io mill the pulverized cddl fimer. The more ihe surhiuc area ui' the pulverized ccui is in contact with the air.
  • the nuue the nxiduliim [vaciiim with axi'gen in the air is iniawlficd, whieh will came ihe i-i-’niainer in accumulfi-tc.
  • the pulverised coal temperature riaca, und the spoEittmcuus combustion of pulverized coal is more likely to occur and cause an explosion.
  • the ecul mill is prime to spOnUmeiiiti combUHiinn explosion during the yiortiing process, mainly due 1t> the oxiddiioti roue lion of pulverized ccml and oxygen in the air to pnoducL- L'fi.
  • Jbc uxvuvniMtion of CO gas increasesforced spsec inside ihe coal mill, which reduces the ignition point of the combustible mixture in the coal mill.
  • the risk of fire or explosion of the euai mill is increased.
  • the imcmul temperature and pressure of the coal mill me sharply increased, which will accelerate the spontaneous combustion explosion.
  • the CO content in the coal mill is the main factor causing I he spontaneous combustion explosion of the coal milk
  • the probe with the filtering device is generally used, but the probe is easy to wear for a long time and the coal powder is easy to accumulate at the gas inlet of the probe. The sampling is inaccurate. Hie sampling speed is slow, the large gmnuinr wal powder is filtered through the filtering device, and then prt>trcMmem such aa cooling, dust removal, water removal, etc., finally, the CO gas is analyzed, and the analysis methods mainly include electrochemical analysis method and Infrared method.
  • Chincsc invention patent ptihlkaiicvi number I G227U374A- publication Jute: December 7, 201 1, disclosed a CU yas detection and alarm du vice, belonging to the 11 dd of harmful gas detection technology, which includes CO gas detection altmn signal processing main conlrol c ire ail, vkclrlcily Chemical sensor. CO gas detect! an PPN
  • the utility model is cherncimzed in that s relay k coil and a conlaul switch c iml re I led by the CPU program controlled by the CO gas cldeciion alarm signal processing muin ennirei!
  • Chinese Invention patenf publication number: I04771852A publication datei 15 th of 2015. disclosed n pulverized coal tank inert gas protection device and iti use method, which comprises a CO2 output line and an N2 output line:
  • the first total control valve, the first decompression table, the first vaporizer, the first inserting controller and the fust throlllc valve are connected in series ⁇ one and of" the COZ output pipeline is connected to the COZ storage device, and lhe other end is connected to more than.
  • the control Jiystem the control system is respectively connected to the first main control valve and the second main control valve.
  • the invention cart c (Tec lively prevent the spontaneous cumhuslion nt the ccrnl powder, ond cun also nrmke the inert gas gently pass into lhe pulverized coul tank, i hereby cyksuring that tfic pulverized uwil particles reach a stable state gently.
  • the disadvaniuge is that the patent is used for y-nti-spontuneou.s combustion explosion of pulverized cral tank, and the pulverized coal tank is used for storing the pulverized coal memev-eti zed coal, the internal working condition is relatively simple, and the volume is small;
  • the inert gas can reduce the possibility of spontaneous combustion explosion, the inert gas The addition well increase die internal pressure of the pulverized coal lank, which will bring & burden tti the pulverized coal lank.
  • the main object ol the proem in venlion system is iWHilahte with Industrial Nilrogfn filled yslmdcry, and am number cylinder qountity LJIFI prva idc within the .system, h-cnie ihi ⁇ ven much etrorvunii.-dlJ ⁇ duraper i!tc l.h.L'il l) pc Nitrogen gu.-ncrinm' PSA unh
  • Another object of the present irv-trnrirm system wherein N2 AHR.XTLON SYSTEM is movable and user can fix the system anywhere near to Coal Bin hence nitrogen gas pipeline cost can save much higher than fixed type PSA systcirt
  • N2 AERATION SYS'lEM used the number of industrial seamless cylinder end each cylinder provided with elcctric/crtaniial operated control valves. User can control /select the operation of cylinder Iten.ee system can operate continually without any disiurhanoe and full system shut down i* not Applicable.
  • N2 AERATION SYSTEM individual cylinder wn send for rel'illtrig without disturbing the system operation.
  • Even a high-prctsnri 1 siimiee cylinder however minimum quantity storiLge cylinder can store ninre gas quantity- in short the present invention system can actiumnndasc within the small orca near 1o operation place, Moreover the system is ccunomicaUy clu: «i
  • invcntinn system is lully LuUoiitaLi eally Lipernu'd for user DCS panel. In Hi?
  • Standby (reserve) cylinder banka also can provide as per the User spedfieatiork
  • each Cyfinder Manifold provided with a pneumatically operated high-pressure valve with a solenoid actuator. Operation whage shal be as awriabta at the site, ( Selector valve- one each for Main and Standby One)
  • Fig. represents the schematic diagram for nitrogen purging system for single coal
  • bln Fifr2 represents the schematic diagram for nitrogen purging system for multiple coal bin
  • FIG. 1 Required number of N2 gas-filled seamless cylinder (Item No-1) Tiinual on the specially designed cylinder mounting platform, this platform resting on load cell unit ( Item no, 11 )- Minimum 4 nos load cell unit proposed for each cylinder mounting platform,
  • This load cell unit has connected with a digital weight monitoring unit for continued monitoring of the cylinder with gas weight Total weight during the eonrmrissiomng of the system total cylinder bank weight will set with monitoring unit and alarm set point alio user can finalize the alarm sei point, hence during gas discharger user panel can get the audlo/visual signal as M2 gas cylinder weight losa/empty, After receiving lhe signal user can replace the N2 cylinder or lhe user can send lhe cylinders for re-filling.
  • each cylinder manifold is fixed with a Pneumatic operated directional valve with a solenoid actuator (item-4), this valve is operated by the user according to the selection of Main/Standby.
  • a solenoid valve manual operated valve with open/close position indicator (Item 6) provided with Main/Standby line for the isolated line during the maintenance.
  • Main & Standby lines join together and lead to a single supply line for gas flow to the Fine coal Bin/protected area.
  • a pneumatically operated Pressure reducing valve with position indicator (Item- 5) with analogue output signal provided for reducing the initial gas pressure to 2.5 . bar.
  • Multi number of pressure-reducing valves also will provide if pressure is not reached in the designed out-put pressure. Users can control the valve opening position according to the pressure in the line. Valve opening potion also can monitor by the users based on the analogue output signal of the position indicator provided with the valve.
  • a solenoid valve (Item-3-a)( Optional) is provided to control ON/OFF the gas flow from the Users panel
  • Manual operated isolation valve (Item-6-a) with ON/OFF position indicator is also provided for the Isolate line manually.
  • Pressure transmitter with analogue output (Item-8) provided in the same line, so User can find the actual pressure available in the line.
  • a pressure gauge (Item 7) was proposed for local verification of the pressure.
  • Flow monitor with the analogue output signal (Item- 10) also provided for monitoring the flow rate at the entry point, so the user can do the needfill control from the user panel.
  • End of the pipeline in the present invention system have provided a specially designed self-resetting type nozzle for discharge the gas to the Coal Bin/protected area.
  • This nozzle normally in close condition and during the gas discharge nozzle opens with the pressure of N2 gas.
  • Brief operation log of the present invented system is utilizing 120 to 150 bar high-pressure Nitrogen gas storage gas injecting to Fine Coal Bin hopper area through discharge nozzle at the pressure 2.5 to 1.5 bar with a required flow rate of 3.5 M3 to 20 M3 per hour. Also in the present invented system have provide the facility to control the pressure and flow rating according customer specification.
  • N2 cylinder system for fine Coal bin conical portion aeration the system consisting from the storage N2 cylinder to Gas discharge nozzle to Fine coal Bin. 100% standby cylinders are also included in present system design. Cylinder capacity will finalize based on storage capacity and flow rate required by the user.
  • each cylinder manifold is provided with an electro/pneumatic selector valve so, gas flow can confrol by the user from the control panel as main or standby.
  • One Isolation valve provided the outlet line of each selector valve so the user can isolate the line for doing the maintenance of further outlet portion . of the pipeline.
  • Outlet pipeline directly fixed with to Fine coal bin hopper portion the same tine can be provided with multiple coal bin hopper as shown in Fig, 2 with electric/pneumatic directional valves, this can make the economic system with a centralized cylinder bank.
  • flow monitor and pressure monitor provide for each flow section.
  • Cylinder battik provided with load cell mechanism for monitoring the cylinder with gas weight, so during the discharge of gas, user can get the infomatima how much weight becomes less in the cylinder bank so user can replace empty cylinder immediately for further use.
  • the complete system shall be operated from the user DCS panel. Entire N2 system shall be automatically controlled by the user from the DCS panel. The operating voltage shall be considered based on availability with the user. (If user need separate panel, we can incorporate the same as optional)

Abstract

La présente invention concerne un système de purge au N2 pour l'aération de soute à fines de charbon. La présente invention concerne un système de purge à l'azote pour l'aération de soute à fines de charbon en injectant de l'azote à basse pression dans la trémie de soute à charbon afin d'empêcher la présence de particules de poussière dans la partie trémie et d'éviter les erreurs de lecture des différents équipements de surveillance installés dans la soute à charbon. Une fois que les contenus de la soute à charbon sont combinés à de l'azote, une dilution se produit. Cette combinaison est ensuite ventilée, et le processus est répété. Ce procédé est idéal lorsqu'il s'agit d'une exploitation avec soute à charbon uniquement. La quantité d'azote nécessaire dans ce cas dépendra du nombre de purges sous pression requises pour réduire le contaminant jusqu'à ce qu'il atteigne un niveau acceptable. La présente invention est principalement utilisée pour l'aération de soute à fines de charbon dans les cimenteries et ce système peut également être utilisé dans d'autres domaines où de l'azote à basse pression est injecté en continu ou par intervalles pour répondre à une partie des besoins du système.
PCT/IN2021/050906 2021-07-26 2021-09-15 Système de purge au n2 pour l'aération de soute à fines de charbon WO2023007503A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202121033504 2021-07-26
IN202121033504 2021-07-26

Publications (1)

Publication Number Publication Date
WO2023007503A1 true WO2023007503A1 (fr) 2023-02-02

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Application Number Title Priority Date Filing Date
PCT/IN2021/050906 WO2023007503A1 (fr) 2021-07-26 2021-09-15 Système de purge au n2 pour l'aération de soute à fines de charbon

Country Status (1)

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WO (1) WO2023007503A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09267047A (ja) * 1996-04-01 1997-10-14 Ishikawajima Harima Heavy Ind Co Ltd 微粉炭ミルのシール流体供給装置
JP2007237011A (ja) * 2006-03-06 2007-09-20 Chugoku Electric Power Co Inc:The 石炭ミルの火災予防方法及びその装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09267047A (ja) * 1996-04-01 1997-10-14 Ishikawajima Harima Heavy Ind Co Ltd 微粉炭ミルのシール流体供給装置
JP2007237011A (ja) * 2006-03-06 2007-09-20 Chugoku Electric Power Co Inc:The 石炭ミルの火災予防方法及びその装置

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