CN106139450A - Coal pulverizer inerting fire extinguishing system - Google Patents
Coal pulverizer inerting fire extinguishing system Download PDFInfo
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- CN106139450A CN106139450A CN201510138694.XA CN201510138694A CN106139450A CN 106139450 A CN106139450 A CN 106139450A CN 201510138694 A CN201510138694 A CN 201510138694A CN 106139450 A CN106139450 A CN 106139450A
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- coal pulverizer
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Abstract
The invention discloses a kind of coal pulverizer inerting flame protection system.nullCoal pulverizer inert gas is water vapour，Start at coal pulverizer、Stop being used to lower the oxygen content of coal dust in coal pulverizer，Inerting steam pressure 0.689MPa，Vapor (steam) temperature 179 DEG C，The most main inerting 2 minutes，Injection steam 1972kg/min，General 20 minutes of auxiliary inerting，Injection steam flow 197kg/min，Inerting steam valve uses pneumatic operated valve to control，Remote operation，The position of injection is at coal pulverizer First air main pipeline and separator inlet，Coal pulverizer inerting flame protection system mainly uses steam as inert media，The great advantage utilizing steam is to allow injection rate big，Ensure that volatile matter is constantly removed，Another one important advantage is，After coal pulverizer or raw-fuel feeder trip，Combustible in coal pulverizer can be sent into burner hearth soon，Coal pulverizer is restarted the most safely.
Description
Technical field
The present invention relates to coal pulverizer inerting flame protection system, specifically a kind of coal pulverizer inerting flame protection system, be particularly suited for the running protection of coal pulverizer, ensure that equipment secure context has irreplaceable effect.
Background technology
Operating mill fire has many factors.Modal ignition cause.Modal ignition cause is to have foreign material in coal pulverizer overtemperature, coal pulverizer and amass coal up and down in mill bowl region.Pulverizer outlet temperature never allows more than 93.3 DEG C, and when using coal to exceed the operation of this temperature, the probability caught fire will increase.If exotic such as paper, cloth grass, timber etc. are gathered in coal pulverizer, probability of catching fire will increase.These materials can not be grated, and hampers the supply of raw coal.Once they enter pulverized coal preparation system, will flock together and cause catching fire, and the coal of surrounding of igniting.Therefore, when checking every time, these materials should be cleared up away from coal pulverizer.The generally modal reason of mill fire is long-pending coal.Individually with vision or other sensation detection coal pulverizers when catching fire supervisor, sluggish, more seriously need people place oneself in the midst of danger region.
Summary of the invention
For stoping because of the mill fire harm to equipment, the present invention provides a kind of coal pulverizer inerting flame protection system, it is characterized in that: coal pulverizer inert gas is water vapour, start at coal pulverizer, stop being used to lower the oxygen content of coal dust in coal pulverizer, inerting steam pressure 0.689MPa, vapor (steam) temperature 179 DEG C, the most main inerting 2 minutes, injection steam 1972kg/min, general 20 minutes of auxiliary inerting, injection steam flow 197kg/min, inerting steam valve uses pneumatic operated valve to control, remote operation, the position of injection is at coal pulverizer First air main pipeline and separator inlet.By spraying steam to carrying out coal pulverizer inerting fire extinguishing to coal pulverizer.
The present invention realizes with following technical scheme: a kind of coal pulverizer inerting flame protection system; by being contained on coal chute of coal feeder, coal pulverizer outlet, coal pulverizer entry zone, dump valve outlet, the detection system of catching fire of fine coal tube outer surface measure catch fire generation time; after control system receives warning; audible-visual annunciator in all deathtraps of startup warning system control and control room, notifies that all personnel should leave from deathtrap.Control system starts inerting fire extinguishing system simultaneously, open inerting steam valve at coal pulverizer First air main pipeline and separator inlet, spray steam (inerting steam pressure 0.689MPa, vapor (steam) temperature 179 DEG C) to coal pulverizer, until all signs that catch fire all disappear, stop alarm system and inerting fire extinguishing system.Start purging system in time and clean out coal pulverizer inner product coal.
Patent of the present invention provides the benefit that: coal pulverizer inerting flame protection system mainly uses steam as inert media.The great advantage utilizing steam is to allow injection rate big, it is possible to ensure that volatile matter is constantly removed.Another one important advantage is, after coal pulverizer or raw-fuel feeder trip, the combustible in coal pulverizer can be sent into burner hearth soon so that coal pulverizer is restarted the most safely.Additionally steam is nontoxic and cheap, and the thermal shock to coal pulverizer housing is less.
Accompanying drawing explanation
Fig. 1 is present system electrical principle block diagram.
Detailed description of the invention
As shown in drawings, a kind of coal pulverizer inerting flame protection system, system includes catch fire detection system, warning system, inerting fire extinguishing system, purging system and control system composition.
According to pulverized coal preparation system catch fire its scene classification, they be segmented into five kinds of fundamental types, i.e. feeder catch fire, grind catch fire on bowl, grind catch fire under bowl, dump valve catches fire, coal pipe catches fire.So catching fire detection system be necessary for as shown in drawings on coal chute of coal feeder, coal pulverizer outlet, the outlet of coal pulverizer entry zone, dump valve, temperature detection device is installed to cover the detection of all of ignition temperature at fine coal tube outer surface.The temperature of the most all temperature detection devices detection all must incoming control system.
When detection system of catching fire detects and catches fire generation, after control system receives temperature alarming, start warning system to control, make to be contained in all deathtraps (around coal pulverizer, air channel, coal pipe and raw-fuel feeder district) and control room in audible-visual annunciator send sound and light alarm, notify that all personnel should leave from deathtrap.Till warning should keep being triggered to all automatic triggering blackouts, by manually disannuling a call.The artificial warning triggered needs artificial termination, until finding out the reason of warning, after taking correction measure ann reset, just can reenter deathtrap.
Simultaneously when detect catch fire time, operations staff also should perform necessity inerting fire extinguishing program, this contents of program depends on the place that catches fire.The following is the inerting fire extinguishing program of all kinds of fire: mill bowl is upper and lower when detecting, drain or coal pipe catch fire, open inerting steam valve at coal pulverizer First air main pipeline and separator inlet, spray steam (inerting steam pressure 0.689MPa, vapor (steam) temperature 179 DEG C) to coal pulverizer, and be raw-fuel feeder tripping operation.Once coal pulverizer becomes inertia, allow water be ejected into mill bowl up and down, separator zone or be ejected into dump valve on demand.The time that water injection starts is made by oneself by operations staff, but coal pulverizer must make inert vapor valve open holding inerting until water injection terminates always, after coal pulverizer empties, coal pulverizer can be with stall and isolate, and water injection should continue until all signs that catches fire all disappear.If detect and catch fire in tripping operation coal pulverizer, the low inerting flow that should start inerting fire extinguishing system makes water be ejected into coal pulverizer mill bowl up and down, separator or be ejected into dump valve.Water injection should be sign all disappears to all signs that catch fire.Coal pulverizer inner product coal will be cleared up the most as occasion serves.Water is mist sprayed to coal pulverizer, and its flow be enough to put out a fire, and the eject position of water should not cause detonation or stir the combustible of precipitation.When all signs that catch fire disappear, just can stop, and make coal pulverizer stall, isolation, then check.
At coal pulverizer after water sprays, long-pending coal must clean out.After coal pulverizer and chamber thereof are cooled to room temperature and ann reset and start suitably to ventilate, regular measure isolation should be taked before entering coal pulverizer and personal distance should be reserved, simultaneously it should be noted that check for sultry dump, any sultry coal should put out.After checking that result is satisfactory, just can start purging system and clean.
Claims (1)
1. a coal pulverizer inerting flame protection system; it is characterized in that: coal pulverizer inert gas is water vapour; start at coal pulverizer, stop being used to lower the oxygen content of coal dust in coal pulverizer; inerting steam pressure 0.689MPa; vapor (steam) temperature 179 DEG C; the most main inerting 2 minutes; injection steam 1972kg/min; general 20 minutes of auxiliary inerting; injection steam flow 197kg/min; inerting steam valve uses pneumatic operated valve to control, and remote operation, the position of injection is at coal pulverizer First air main pipeline and separator inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138694.XA CN106139450A (en) | 2015-04-20 | 2015-04-20 | Coal pulverizer inerting fire extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138694.XA CN106139450A (en) | 2015-04-20 | 2015-04-20 | Coal pulverizer inerting fire extinguishing system |
Publications (1)
| Publication Number | Publication Date |
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| CN106139450A true CN106139450A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510138694.XA Pending CN106139450A (en) | 2015-04-20 | 2015-04-20 | Coal pulverizer inerting fire extinguishing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339209A (en) * | 2018-01-19 | 2018-07-31 | 华能国际电力股份有限公司海门电厂 | One kind preventing pulverized coal preparation system detonation Full automatic fire fighting device and its processing method |
| CN108896116A (en) * | 2018-09-26 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | Coal powder leakage and explosion online monitoring method for large coal gasification device |
| CN112221041A (en) * | 2020-09-04 | 2021-01-15 | 广东红海湾发电有限公司 | Fire extinguishing device for coal mill |
-
2015
- 2015-04-20 CN CN201510138694.XA patent/CN106139450A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339209A (en) * | 2018-01-19 | 2018-07-31 | 华能国际电力股份有限公司海门电厂 | One kind preventing pulverized coal preparation system detonation Full automatic fire fighting device and its processing method |
| CN108339209B (en) * | 2018-01-19 | 2020-09-22 | 华能国际电力股份有限公司海门电厂 | Full-automatic fire extinguishing device for preventing powder process system from deflagration and processing method thereof |
| CN108896116A (en) * | 2018-09-26 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | Coal powder leakage and explosion online monitoring method for large coal gasification device |
| CN112221041A (en) * | 2020-09-04 | 2021-01-15 | 广东红海湾发电有限公司 | Fire extinguishing device for coal mill |
| CN112221041B (en) * | 2020-09-04 | 2023-08-18 | 广东红海湾发电有限公司 | Fire extinguishing device for coal mill |
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Application publication date: 20161123 |