0
By
Vinod Gogoriya
Intelligent Gas Alarm India Pvt Ltd
(c) Intelligent Gas Alarm India Pvt Ltd 1
Topics covered:
Understanding “Smoke & Fire” and its stages
Conventional, existing smoke, fire detection products
Limit...
Understanding Smoke & Fire:
STAGES OF FIRE:
1st
stage: Generation of Gas Radicals – Incipient Stage
2nd
stage: Non-Visi...
(c) Intelligent Gas Alarm India Pvt Ltd 4
Stage I : Incipient Stage
There is no visible smoke, no flame and very little heat. A significant
amount of invisible–but...
Stage II : Smoldering Stage I
There is invisible smoke, but no flame and very little heat.
Detectable by aspirating smok...
Stage III : Smoldering Stage II
There is visible smoke with sooth particles, little heat .
Detectable by optical, ionisa...
Stage IV : Heat Stage
There is considerable amount of smoke with heat.
Detected by heat sensors based on resistance chan...
Stage V : Fire & flare Stage
There will be flares and fire.
Damage is DONE. This is stage of damage control, rather than...
Limitations of Conventional, Existing
products:
Optical, ionisation type smoke detectors
 Cannot work in dusty environme...
Limitations of Conventional, Existing
products:
VESDA system
 Too complex, costly, high on maintenance
 Not suitable fo...
Basic of VEFSA system:
 Based on detection of earliest signs of smoke
 Monitor and detects gaseous radicals of hydrocarb...
VEFSA system – components:
 Sensing cell / Element
 Separate Unit
 Integral with monitoring & alarm unit
 Monitoring &...
VEFSA system – working:
 Sensing cell / Element
 Monitor and measure gaseous radicals in ambient air/ environment
 Send...
Features of VEFSA:
 Offers earliest warning signals, based on gaseous radical generation
 Proactive system, rather than ...
Sizing, selection:
 VEFSA sensor unit works good for 1000-2000 sq ft area (Standard ventilation,
design)
 Central unit w...
Application Areas:
 Coal mines, washeries, bunkers, container etc
 Power plants – coal based
 Clear rooms, pharmaceutic...
Contact Us:
Intelligent Gas Alarm India Pvt Ltd
69, Ramgali 7, Raja Park
Jaipur 302004
Ph: +91-141-4033769, 99833 45452
We...
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Smoke & Fire detector - Early fire monitoring system for Coal application

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Do you need to install smoke monitor for coal area?
Do your smoke detector does not work in coal area, conveyor, crusher units?

Gasalarm India offers smoke and fire detector for coal area application - coal mines, crusher units, bunker, stockyard, conveyor belt, railway wagon etc for mines, power plants, railway, shipyard, bunker area.
Based on advance gas radical monitoring technology, these sensors are not affected by coal dust, humidity, vibration, motion, radiation and other background gases, hence offer you early monitoring with adjustable trigger limits.
It offer perfect solution for your fire and smoke and safety needs.

Contact us: contact@gasalarm.co.in

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Transcript of "Smoke & Fire detector - Early fire monitoring system for Coal application "

  1. 1. By Vinod Gogoriya Intelligent Gas Alarm India Pvt Ltd (c) Intelligent Gas Alarm India Pvt Ltd 1
  2. 2. Topics covered: Understanding “Smoke & Fire” and its stages Conventional, existing smoke, fire detection products Limitations of existing products Basic concept of “very early fire & smoke monitoring (alarm) system (VEFSA)” Working of VEFSA and its components Features of VEFSA system Models, variants of VEFSA Sizing, selection, designing of VEFSA system Applications & Advantages of VEFSA (c) Intelligent Gas Alarm India Pvt Ltd 2
  3. 3. Understanding Smoke & Fire: STAGES OF FIRE: 1st stage: Generation of Gas Radicals – Incipient Stage 2nd stage: Non-Visible smoke – Smouldering Stage I 3rd stage: Visible smoke – Smouldering Stage II 4th stage: Red Hot / Heat stage – Heat Stage 5th stage: Fire Flame – Flame Stage (c) Intelligent Gas Alarm India Pvt Ltd 3
  4. 4. (c) Intelligent Gas Alarm India Pvt Ltd 4
  5. 5. Stage I : Incipient Stage There is no visible smoke, no flame and very little heat. A significant amount of invisible–but sometimes smellable–combustion particles may be created. This stage usually develops slowly. Products of Gaseous radicals – mixed hydrocarbon radicals or CO radicals. Conventional or even VESDA do not respond to these ‘early’ signs of smoke and fire. VEFSA (Very early fire and smoke monitoring system), based on world-class technology picks up these signs and generate alarm. (c) Intelligent Gas Alarm India Pvt Ltd 5
  6. 6. Stage II : Smoldering Stage I There is invisible smoke, but no flame and very little heat. Detectable by aspirating smoke detectors like VESDA system. (c) Intelligent Gas Alarm India Pvt Ltd 6
  7. 7. Stage III : Smoldering Stage II There is visible smoke with sooth particles, little heat . Detectable by optical, ionisation type smoke detectors. (c) Intelligent Gas Alarm India Pvt Ltd 7
  8. 8. Stage IV : Heat Stage There is considerable amount of smoke with heat. Detected by heat sensors based on resistance change, melting of heating elements etc. (c) Intelligent Gas Alarm India Pvt Ltd 8
  9. 9. Stage V : Fire & flare Stage There will be flares and fire. Damage is DONE. This is stage of damage control, rather than detection. (c) Intelligent Gas Alarm India Pvt Ltd 9
  10. 10. Limitations of Conventional, Existing products: Optical, ionisation type smoke detectors  Cannot work in dusty environment, industries, clean rooms, flour mills, pharma/power dust industries  Affected by change in temperature, humidity, vibration, moisture etc  Poor response to little smoke or early stage. By the time they response, its too late  Offer false alarms Heat sensor  Respond to very late stage of fire – no much time left before flares (c) Intelligent Gas Alarm India Pvt Ltd 10
  11. 11. Limitations of Conventional, Existing products: VESDA system  Too complex, costly, high on maintenance  Not suitable for every application, industries, particular small establishment  Detect invisible smoke – 2nd stage of smoke & fire CCTV, flame detector etc.  Detect last stage of fire  Focused more on damage control, rather than proactive detection. (c) Intelligent Gas Alarm India Pvt Ltd 11
  12. 12. Basic of VEFSA system:  Based on detection of earliest signs of smoke  Monitor and detects gaseous radicals of hydrocarbons and carbohydrates (CO+, HC+)  These gaseous radicals reacts with sensor electrolyte to generate proportional response.  Continuous Monitoring of these radicals, even before invisible smoke occurs (c) Intelligent Gas Alarm India Pvt Ltd 12
  13. 13. VEFSA system – components:  Sensing cell / Element  Separate Unit  Integral with monitoring & alarm unit  Monitoring & Alarm Unit  Standalone unit with integral sensor unit  Separate as central unit (c) Intelligent Gas Alarm India Pvt Ltd 13
  14. 14. VEFSA system – working:  Sensing cell / Element  Monitor and measure gaseous radicals in ambient air/ environment  Sends signals, continuously to central processing / monitoring unit  Monitoring & Alarm Unit  Accepts signals from sensing units  Generate alarms, warning signs, sends signal to FAS depending upon pre- defined limits  Adjustable system sensitivity, depending upon application, industries.  Have fault, error alarm, error log  PLC Based system with LCD display unit  With auto diagnostic watch dog (c) Intelligent Gas Alarm India Pvt Ltd 14
  15. 15. Features of VEFSA:  Offers earliest warning signals, based on gaseous radical generation  Proactive system, rather than damage control system  Unaffected by dust, temperature, humidity, moisture, vibration, frequency, radiations etc.  Can be mounted in any direction  Applicable to any application, industries, area  Adjustable sensitivity  Auto diagnostic watch dog  Fault LEDs, error log  No design requirement, low on maintenance, low on installation cost  Low initial cost wrt VESDA (c) Intelligent Gas Alarm India Pvt Ltd 15
  16. 16. Sizing, selection:  VEFSA sensor unit works good for 1000-2000 sq ft area (Standard ventilation, design)  Central unit will be designed and selected based on no. of sensor units.  Installation at Ceiling / pillars  Mounting in any direction (no orientation problem) (c) Intelligent Gas Alarm India Pvt Ltd 16
  17. 17. Application Areas:  Coal mines, washeries, bunkers, container etc  Power plants – coal based  Clear rooms, pharmaceuticals, medical, food, powder, flour mills  Defence, naval, artilleries stockyard  Packing, warehouse etc  Basement parking area  Cold stores, ripening chambers, plastic industries  Shipyard, dockyard, bunkers (c) Intelligent Gas Alarm India Pvt Ltd 17
  18. 18. Contact Us: Intelligent Gas Alarm India Pvt Ltd 69, Ramgali 7, Raja Park Jaipur 302004 Ph: +91-141-4033769, 99833 45452 Web: www.gasalarm.co.in, www.automationindia.in Email: contact@gasalarm.co.in (c) Intelligent Gas Alarm India Pvt Ltd 18
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