CN101559863B - Silo inertia protection device - Google Patents
Silo inertia protection device Download PDFInfo
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- CN101559863B CN101559863B CN2008102253841A CN200810225384A CN101559863B CN 101559863 B CN101559863 B CN 101559863B CN 2008102253841 A CN2008102253841 A CN 2008102253841A CN 200810225384 A CN200810225384 A CN 200810225384A CN 101559863 B CN101559863 B CN 101559863B
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Abstract
The invention relates to an explosion-proof inertia protection process for a pulverized coal and raw coal silo system of a thermoelectric power station and a device thereof. The device comprises an air supply, a gas tank, a decompressor, and embedded pipes arranged on silo walls and bottom plate of the silo and a gas locking pipe network, a gas filling pipe network and a breather pipe network which are arranged inside and outside the silo and combined to realize integration of locking, filling and breathing, thus preventing and inhibiting self combustion and explosion of raw coal in the silo deeply. The inertia protection method of the invention can be used for safety prevention of inflammable and explosive locations such as powder magazines, granaries, oil houses, coal mines, chemical workshops and the like.
Description
Technical field
The invention belongs to the silo fender guard, be specifically related to a kind of inerting gas replacement protection technology and device that is used for heat power plant boiler coal pulverized coal preparation system.
Background technology
Now, in order to solve the coal air storage of loosing, contaminated environment reduces the weathering ature of coal.Taked the silo storing mode.Facts have proved that raw coal silo housing coal storage has takes up an area of little, no dust pollution, is applicable to advantage such as various climatic conditions.But because raw coal silo vome of shell reaches tens thousand of cubic meters, belong to the container of relative closure, also brought the new problem of safety anti-explosive, as because the coal self-characteristic, i.e. oxidation heat liberation spontaneous combustion tendency is added " the air duct effect " of silo.In limited relative sealed space, be unfavorable for heat radiation, raw coal spontaneous combustion is certain a bit at first generation that possesses autoignition conditions in the part in addition, finally causes large tracts of land spontaneous combustion and detonation.During local spontaneous combustion, because scope is little, heat is low, ambient interference is big.Silo routine monitoring facility as: sensors such as temperature, combustable gas concentration, tolerance can not in time be made accurate forecast.If by the time the spontaneous combustion scope is big, the heat height, combustable gas concentration is big again forecast can affect improvement opportunity again adversely.The fire extinguishing of silo ignition retard is very difficult, can only consider prevention and control, promptly non-fire-fighting fire extinguishing problem.This class problem is for running into overhaul of the equipments, and when needing to store raw coal for a long time, the coal that especially the spontaneous combustion tendency is high, magnitude of explosion belongs to the I class is just more urgent.
At present power plant mainly usefulness be the aqueous vapor inerting system, the source is wide, price is low, but after spraying into water vapour, can't keep very high system temperature, can be condensed into aqueous water very soon and lose the effect of inerting gas, and the coal of burning can generate inflammable and explosive water gas with water vapor acting, all the other are the standby host state because each use has only 8～12 minutes simultaneously, also the phenomenon that the time spent can't afford to drive often appears in a large amount of hydrophobic hold modes of need, and is not only uneconomical but also dangerous.
Summary of the invention
At the characteristic of silo blast mechanism and coal, carried out long-term analytic demonstration, finally designed the silo inertia protection system.Inertia protection device adopts locks, fills, changes three-in-one automatic inactive protect technology.Explosion-proof technology is risen to the prevention and control stage, is comprehensive, profound datonation-inhibition, anti-explosion safety up-to-date technology.It can prevent effectively that silo from blasting, and causes unnecessary economic loss, thereby reaches the purpose of further protection silo.
The silo inertia protection device cardinal principle is: lock: with inerting gas lock coal outlet, isolated extraneous oxygen; Fill: permeate highly purified inerting gas to the coal seam, to coal seam cooling, protective mulch; Change: cement out with the fire gases of inerting gas with top, coal seam; It is minimum that the interior combustion source of silo is dropped to, and combustion-supporting source reaches minimum, thereby actv. has been protected the safety of silo, and detailed process realizes around locking, fill, change three grades exactly.
The present invention proposes the coal powder process that is used for thermal powerplant of arch, the explosion-proof inertia protection device of run coal bin system includes: one or more sources of the gas, pressure purger, one or more storage tank also include:
The pre-pipe laying of a plurality of lock gas is arranged on the circumference of silo body inner wall protection eaves, and circle distribution is in silo body, and the coal spout place pre-pipe laying of lock gas is positioned at the coal spout place of activation feeder below, and is arranged on coal spout place, center convolution reclaimer below.Finish connection with steel pipe from source of the gas to each lock gas pre-pipe laying, constitute lock tracheae net, guarantee when system monitoring produces primary signal to silo, system begins to fill highly purified inerting gas automatically in the silo that produces elementary warning, pin coal outlet, stop air from the coal outlet coal storage layer infiltration that make progress.
A grommet type seals; the one end is installed on the protection eaves in the silo body by angle steel, bolt; one end is fixedly connected on the shelves material ring of silo bottom; fuse with the rotary vane of spiral discharging machine,, do gyroscopic movement around center shaft together by driver drives; make silo bottom relative closure; protection profile of tooth rotary track is not buried by material, stops and has filled the into inerting gas leak of silo, and reduce involving in of oxygen.The implementation of grommet type seals is a kind of in flexible, the rigidity.
Inflation ring of the present invention has two kinds of inflation modes:
1. hoop multi-point inflation
Inerting gas has the hole of certain intervals to charge into highly purified inerting gas as inflation inlet to silo so that inner multi-point inflation ring is upward a plurality of.Poroid can be round, the side etc. multiple shape.
2. hoop continous way inflation
Inerting gas can only charge into highly purified inerting gas to each absolute altitude place of silo continuously equably with fixed position place embedded steel tube as inflation inlet.
The required a plurality of pre-pipe laying of one-level inflation ring, be arranged on the interior ring bottom inlet place of silo a plurality of activation feeders in bottom and center convolution reclaimer, the interior ring bottom and the place, outer shroud bottom of center convolution reclaimer, its effect is to silo base plate place infiltration high purity inerting gas.
Wherein, an inflation ring is respectively arranged in 6 of silo bottoms or a plurality of activation feeder, center convolution reclaimer entrance, and the inflation mode is the hoop continous way.Be positioned at the inflation ring of the ring bottom and the outer shroud bottom of center convolution reclaimer, mode is the inflation of hoop multi-point.
The pre-pipe laying of secondary inflation ring is arranged on silo endogenous protective eaves with absolute altitude place and protection eaves and silo wall intersection.The secondary inflation ring inflation mode that wherein is on the silo protection eaves is the hoop continous way.The pre-pipe laying of evenly arranging with absolute altitude place circumference by the protection eaves of secondary charges into highly purified inerting gas to silo.The secondary inflation ring inflation mode of protection eaves and silo wall intersection is the hoop multi-point; be arranged on silo inside; being characterized in inflating ring can be installed in the square groove that silo reserves; installation accessories also can be set will inflate ring and be fixed on the silo inwall, inerting gas has the hole of certain intervals to charge into highly purified inerting gas to silo by a plurality of on the inflation ring.
Three grades of inflation rings can be 2 layers or multilayer, and its pre-pipe laying evenly is arranged on the silo wall circumference that pushes up near silo.
The present invention also the layer in three grades of inflation rings with layer between be provided with automatic charge valve, implementation is a kind of in spring loaded, the gravity type boat davit.Automatically charge valve all is by flange and inflates the standpipe that encircles and fix in two ends up and down; move according to automatic charge valve pressure at two ends is different; its effect is that the automatic tracking coal seam guarantees to fill highly purified inerting gas between coal seam, different level place; to the coal seam cooling, and above the coal seam, form protective cover.
According to the system monitoring signal, air inflator system is according to the rank of the highly automated selection inflation ring in coal seam, automatically begin in producing the silo of reporting to the police, to fill highly purified inerting gas,, reach the purpose that comb. gas concentration is reduced to coal seam infiltration high purity inerting gas.
Fender guard of the present invention also comprises a plurality of embedded boards, is arranged on the silo outer wall, and the assurance dish is climbed at the steel pipe on the silo and is fixed on the silo outer wall.
A plurality of ventilation posts are arranged on the silo inwall circumference, form the ventilation groove.
The pre-pipe laying of a plurality of ventilations is arranged on the silo external wall of upper portion, is in the top of ventilation post, guarantees to charge into from the top down the ventilation post from the inerting gas that source of the gas comes out.
A plurality of scavenge valves, its implementation are a kind of in electromagnetic type, weight valve, the motorized valve.Be arranged on each ventilation post, press the homodisperse layout of absolute altitude, inerting gas is come out by source of the gas, pressure purger, the pre-pipe laying of taking a breath through silo top, be stored in from top to bottom in the ventilation post, can exchange a plurality of scavenge valves generation actions of gas column automatically with the absolute altitude place according to monitor signal.Reach the highly purified inerting gas to this layer injection, gas increases from low to high gradually, and displaces the fire gases on top, coal seam.For the silo of top complete closed, be at the explosion door of silo top mounting strap electric pushrod, the explosion door that original hazardous gas is opened from the silo top in the silo is discharged, and reaches the purpose with hazardous gas in the former silo of inerting gas replacement.
Lock gas, inflation, the pre-pipe laying of ventilation, the mode of trend for saving most pipe network of decision pipe network, the position that pre-pipe laying is provided with can be any suitable position of silo, can be along evenly arranging on the silo circumference, can be in silo inside, also can be at the silo outer wall.
The mode of operation of locking, filling, changing many grades inertia protection device can be when elementary alerting signal is arranged, the gas of unblanking; When senior alerting signal was arranged, inflation was carried out simultaneously with lock gas, also multiple mode such as inflation work only; When senior alerting signal was arranged, ventilation was carried out simultaneously with inflation, lock gas, also several working ways such as ventilation work only.
The number of plies of the pipe network of lock gas, inflation, ventilation is to decide according to the actual conditions at scene and the kind of silo, can be one or more layers.
Pressure purger in the silo inertia protection system of the present invention, its effect are that the gas of the band pressure that comes out from source of the gas is reduced pressure, and make its force value reach requirement, and its implementation can be various valves.
The present invention has adopted " lock, fill, change " three-in-one complex technique, solved silo explosion-proof, control a quick-fried difficult problem.Silo inertia protection device of the present invention is simple in structure; easy to use; maintaining is simple and easy; the unattended operation that can realize ideal; used inerting gas source is wide; inerting is effective, safely and fast, burn into multi-stage protection not, safety factor is big, is applicable to the material storage that various silos, run coal bin, powder storehouse, silo and spontaneous combustion tendency thereof are high.
Description of drawings
Fig. 1 is a silo inertia protection process schematic representation of the present invention.
Fig. 2 is the structural representation of silo inertia protection device of the present invention.
Fig. 3 is a lock tracheae web frame scheme drawing among Fig. 2.
Fig. 4 is the structural representation of grommet type seals among Fig. 2.
Fig. 5 is an appendix web frame scheme drawing among Fig. 2.
Fig. 6 is an automatic charge valve structural representation among Fig. 5.
Fig. 7 is a scavenge trunk web frame scheme drawing among Fig. 2.
Fig. 8 is a scavenge valve structural representation among Fig. 7.
The specific embodiment:
As Fig. 2 is the structural representation of silo inertia protection device.The present invention by 1 source of the gas 1, storage tank 2,2 sources of the gas 3, pressure purger 4, ventilation pipe network 5, lock tracheae net 6, one-level inflation pipe network 7, secondary inflation pipe network 8, three grades of inflation pipe networks 9, annular seal 13, automatically charge valve 18, scavenge valve 21, silo are formed automatically.Detailed process realizes that around locking, fill, change three grades technological process as shown in Figure 1 exactly.Inflammable, explosive gas in the displacement silo make the combustion source cooling in the silo, thereby actv. has been protected the safety of silo.The entry condition of " locking, fill, changing " is to decide according to the characteristic that stores coal in the storehouse, and carries out by the signal that the silo monitoring is transmitted.
Lock gas: as Fig. 1,3; the pre-pipe laying 14 of lock gas is arranged on the circumference of silo body inner wall protection eaves 15; circle distribution; the coal spout place pre-pipe laying 11 of lock gas is positioned at the coal spout place 23 of activation feeder below; and be arranged on coal spout place, center convolution reclaimer below 24; utilize steel pipe will lock the pre-pipe laying 14 of gas, the coal spout place lock pre-pipe laying of gas (11) and couple together, form lock tracheae net.Lock tracheae net move towards according to pre-pipe laying decision, when system monitoring when silo produces elementary alerting signal, use inerting gas blockade coal outlet, avoid the inerting gas leak, improved explosion-proof, datonation-inhibition efficient.
As Fig. 4 is the annular seal structural representation, is made up of angle steel 26, steel ball 27, closing plate 28, bolt 29, steel plate 30 etc.One end is installed on the protection eaves 15 in the silo body by angle steel 26, bolt 29; one end is fixedly connected on the shelves material ring 31 of silo base plate 45; fuse with the rotary vane of spiral discharging machine; by driver drives; do gyroscopic movement around center shaft together, make silo bottom relative closure, protection profile of tooth rotary track 12 is not buried by material; stop and filled the into inerting gas leak of silo, and reduce involving in of oxygen.
Inflation: as Fig. 5, a plurality of one-levels are inflated pre-pipe laying 10, are arranged in 32 entrance, interior ring bottom of silo a plurality of activation feeders 34 in bottom and center convolution reclaimer, the interior ring bottom 33 and 35 places, outer shroud bottom of center convolution reclaimer.Wherein, an inflation ring is respectively arranged in 6 of silo bottoms or a plurality of activation feeder 34, center convolution reclaimer 32 entrance, and the inflation mode is the hoop continous way.Be positioned at the inflation ring of the ring bottom 33 and the outer shroud bottom 35 of center convolution reclaimer, mode is the inflation of hoop multi-point;
On silo endogenous protective eaves 15, evenly arrange the gas filed pre-pipe laying 16 of secondary with silo wall intersection circumference with absolute altitude place and protection eaves 15; wherein be in the secondary inflation ring on the silo protection eaves 15, the pre-pipe laying of evenly arranging with absolute altitude place circumference by the protection eaves 16 of secondary charges into highly purified inerting gas to silo.The inflation ring of protection eaves and silo wall intersection can be installed in the square groove that silo is reserved herein, installation accessories also can be set will inflate ring and be fixed on the silo inwall, inerting gas has the hole of certain intervals to charge into highly purified inerting gas to silo by a plurality of on the inflation ring;
The pre-pipe laying 17 of three grades of inflation rings is arranged on the circumference of silo outer wall different level uniformly, and three grades of inflation pipe networks are coupling together to a plurality of pre-pipe layings from source of the gas; According to the system monitoring signal, the rank that air inflator system selects inflation to encircle according to the height in coal seam begins to fill highly purified inerting gas automatically in producing the silo of reporting to the police, and to coal seam infiltration high purity inerting gas, reaches the purpose that comb. gas concentration is reduced.
Also comprising 2 or a plurality of automatic charge valve in three grades of inflation rings, is automatic charge valve structural representation as Fig. 6, is made up of valve companion flange 36, bonnet, 37, spool 38, bottom flange 39, socket bolt 40 etc.Two ends are fixed by the valve companion flange 36 and the standpipe of inflation ring, move according to automatic charge valve 18 pressure at two ends are different, and the big bottom flange 39 of the pressure of lower end is opened.The coal seam that is higher than automatic charge valve 18 is put on the air protective mulch.Inerting gas is filled in real having reached between coal, the automatic tracking coal seam forms protective cover above the coal seam.Reach comb. gas concentration is reduced, and reduce the purpose of coal seam temperature.At this moment inflation is carried out simultaneously with lock gas.
Ventilation: be ventilation unit construction scheme drawing as Fig. 7, form by 2 sources of the gas 3, ventilation pipe network 5, silo wall 19, automatic scavenge valve 21, the pre-pipe laying 22 of ventilation, ventilation post 20.On silo inner and upper circumference, evenly arrange 20,2 on the ventilation post of enough height or a plurality of, with the absolute altitude place the automatic scavenge valve 21 of one deck is set in the vertical direction of silo wall.When system monitoring arrives senior alerting signal, electromagnet 41 in a plurality of automatic scavenge valve at nearest same absolute altitude place, coal seam moves simultaneously, there is the inerting gas of pressure to open as the plate washer among Fig. 8 42, highly purified inerting gas is injected in this top, coal seam, along with increasing gradually of inerting gas, the hazardous gas of coal seam upper space is progressively discharged from the silo top vent in the silo.For the silo of top complete closed, be at silo top mounting strap Electric Explosion-proof door, the explosion door that original hazardous gas is opened from the silo top in the silo is discharged, and reaches the purpose of replacing hazardous gas in the former silo with the noble gas body.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any those skilled in the art, every technical solution of the present invention that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, variation and modification that above embodiment did according to technical spirit of the present invention.
Claims (11)
1. a silo inertia protection device that is used for powder process of thermal powerplant coal and run coal bin system comprises source of the gas, pressure purger, inertia protection device pipe network, it is characterized in that:
The lock pre-pipe laying of gas (14) is arranged on the circumference of silo body inner wall protection eaves (15), and circle distribution is a plurality of; The coal spout place lock pre-pipe laying of gas (11) is positioned at the coal spout place (23) of activation feeder below, and is arranged on coal spout place (24), center convolution reclaimer below; Between the shelves material ring of protection eaves in the silo body and silo bottom annular seal (13) is installed; The one end is installed on the protection eaves (15) in the silo body, and an end is fixedly connected on the shelves material rings (31) of silo bottom, fuses with the rotary vane of spiral discharging machine, by driver drives, does gyroscopic movement around center shaft together;
Silo base plate (45) is located to reserve a plurality of one-levels and is inflated pre-pipe laying (10), and interior interior ring bottom (33) and the outer shroud bottom (35) of encircling (33) entrance, bottom, center convolution reclaimer that is arranged on silo bottom a plurality of activation feeders (34), center convolution reclaimer located; Upward evenly arrange the gas filed pre-pipe laying of secondary (16) with absolute altitude place and protection eaves (15) with silo wall intersection circumference at silo endogenous protective eaves (15), protection eaves (15) is inflated ring with the secondary of silo wall intersection and is inner multi-point inflation ring; The pre-pipe laying (17) of a plurality of three grades of inflation rings is arranged on the circumference of silo outer wall different level uniformly; By valve companion flange (36) the automatic charge valve (18) and the standpipe of inflation ring are fixed between the multilayer inflation ring;
Ventilation pre-pipe laying (22) is reserved in the silo middle and upper part, and ventilation pipe network (5) is installed; Be provided with ventilation post (20) at the silo inwall, on each ventilation post, press a plurality of scavenge valves of the homodisperse layout of absolute altitude (21), can start the ventilation pipe network of different layers automatically according to the height of different coals position.
2. silo inertia protection device according to claim 1; it is characterized in that being provided with lock, fill, change datonation-inhibition, the explosion-proof pipe network of many grades; reach lock, fill, change three-in-one, be applicable to the material storage that various types of silos, powder storehouse, silo and spontaneous combustion thereof tendency is high.
3. silo inertia protection device according to claim 1, it is characterized in that inertia protection device lock, fill, the trend of replace tubes net mode for saving most pipe network.
According to the lock in the described silo inertia protection device of claim 1, fill, change many grades inactive protect, it is characterized in that mode of operation can be batch (-type), continous way, can also one work or a plurality ofly work simultaneously.
5. according to the pre-pipe laying of lock gas, inflation, ventilation in the described silo inertia protection device of claim 1; it is characterized in that being arranged on any suitable position of silo, can be along evenly arranging on the silo circumference, can be in silo inside; also can be at the silo outer wall, quantity is a plurality of.
6. according to the pipe network in the described silo inertia protection device of claim 1, it is characterized in that and to decide the number of plies of lock gas, inflation, ventilation pipe network according to the actual conditions and the silo kind at scene, can be one or more layers.
7. according to pars intramuralis multiple spot inflation ring in the silo in the described silo inertia protection device of claim 1, a kind of in circular, square of the point that it is characterized in that the multiple spot shape.
8. according to the source of the gas in the described silo inertia protection device of claim 1, the kind that it is characterized in that gas is a kind of in flue gas, carbon dioxide, the nitrogen inerting gas, and quantity is one or more.
9. according to the annular seal in the described silo inertia protection device of claim 1, its feature can have multiple implementation, a kind of in flexible, the rigidity.
10. according to the automatic charge valve in the described silo inertia protection device of claim 1; the height of automatic tracking coal position; realize the inflation of different level place; form protective cover on the surface, coal seam; fill inerting gas in the middle of the coal seam, its feature can be according to the size of silo, and the number of plies of inflation pipe network decides; can be for one or more, implementation is a kind of in spring loaded, the gravity type boat davit.
11. according to the scavenge valve in the described silo inertia protection device of claim 1; evenly arrange along the silo circumference with the absolute altitude place at silo inwall ventilation post; its feature can decide according to the height of silo size or ventilation post; can be for a plurality of, implementation is a kind of in electromagnetic type, weight valve, motorized valve, the lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102253841A CN101559863B (en) | 2008-10-31 | 2008-10-31 | Silo inertia protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102253841A CN101559863B (en) | 2008-10-31 | 2008-10-31 | Silo inertia protection device |
Publications (2)
| Publication Number | Publication Date |
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| CN101559863A CN101559863A (en) | 2009-10-21 |
| CN101559863B true CN101559863B (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102253841A Expired - Fee Related CN101559863B (en) | 2008-10-31 | 2008-10-31 | Silo inertia protection device |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120013472A1 (en) * | 2010-07-15 | 2012-01-19 | General Electric Company | Systems and Methods of Monitoring Combustible Gases in a Coal Supply |
| CN102303758A (en) * | 2010-11-26 | 2012-01-04 | 徐州中矿奥特麦科技有限公司 | Coal storage silo safety protection process and protection system |
| CN102323798B (en) * | 2011-05-16 | 2013-05-15 | 上海发电设备成套设计研究院 | Automatic control system of coal bed loads of thermal power generating unit |
| CN103662490B (en) * | 2013-04-25 | 2016-01-13 | 陕西祥瑞电气工程自动化有限公司 | A kind of coal storage silo feed arrangement |
| CN103625803B (en) * | 2013-12-13 | 2016-03-23 | 徐州中矿奥特麦科技有限公司 | The full inertia protection device of wall silo altogether |
| CN103920260B (en) * | 2014-04-16 | 2016-04-27 | 西安西热锅炉环保工程有限公司 | Low-temperature furnace smoke sucking inerting ball-type coal bunker anti-raw coal oxidation and spontaneous combustion system and method |
| CN105314298B (en) * | 2014-07-29 | 2019-05-17 | 盛美半导体设备（上海）有限公司 | Inert gas shielding reservoir |
| CN104771852B (en) * | 2015-04-03 | 2018-07-24 | 煤科院节能技术有限公司 | A kind of coal dust pot inert gas protection device and its application method |
| CN107082205A (en) * | 2017-05-18 | 2017-08-22 | 北京工业大学 | A kind of ball storehouse inertia protection device |
| CN108455103B (en) * | 2018-03-15 | 2023-11-24 | 樊建华 | Heat-storage pool floating heat-insulating cover with wind resistance, rain resistance and dehumidification functions |
| CN113697308B (en) * | 2021-08-28 | 2022-08-12 | 徐州国晟智能科技有限公司 | Silo safety inerting protection device convenient for quick inflation |
| CN115282543A (en) * | 2022-08-03 | 2022-11-04 | 新疆天池能源有限责任公司 | Intelligent fire prevention and extinguishing system and method for coal storage silo |
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2008
- 2008-10-31 CN CN2008102253841A patent/CN101559863B/en not_active Expired - Fee Related
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