CN100470156C - Method for preventing two-explosion gas high-energy impulse dusting device - Google Patents
Method for preventing two-explosion gas high-energy impulse dusting device Download PDFInfo
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- CN100470156C CN100470156C CNB2006100598133A CN200610059813A CN100470156C CN 100470156 C CN100470156 C CN 100470156C CN B2006100598133 A CNB2006100598133 A CN B2006100598133A CN 200610059813 A CN200610059813 A CN 200610059813A CN 100470156 C CN100470156 C CN 100470156C
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- siphunculus
- air curtain
- tuyere
- tube wall
- tank
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Abstract
A method for preventing high temperature two responses of fuel high energy pulse dust remove device. The fuel high energy pulse dust remove device is composed of a mixture tank, a backfire preventing tank, an ignition tank, a pulse tank and a pulse nozzle. The device is characterized in that: a wind curtain is formed between the pulse tank and the pulse nozzle, the said has certain wind pressure. The wind curtain which has certain wind pressure can be used to block mixture gas, improve mixture gas pressure and fullness in the ignition tank and the pulse tank, and block the direction contact of the mixture gas in the high temperature smoke and dust remove device. The method and device provided in the present invention can effectively block the direction contact of the mixture gas in the high temperature smoke and dust remove device, reduce the bad disturb to the work of the dust remove device from the high temperature smoke.
Description
Technical field
The present invention relates to a kind of boiler ash removal device, particularly a kind of method and air curtain apparatus of preventing combustion gas high energy pulse ash handling equipment high temperature two sound that is used on the combustion gas high energy pulse ash handling equipment.
Background technology
The attached boiler heating surface that combines in of flue gas that fuel burns in heating boiler and produces will make thermal resistance increase, and heat exchanger effectiveness reduces.The pyroconductivity of ash is 0.058～0.165W/ (m
2℃), only be 0.5% of steel plate, if fouling of heating surface, coking in the boiler operatiopn causes thermal resistance to increase, conduct heat and weaken, exhaust gas temperature raises, heat loss increases (grey thick 1mm, heat loss increases about 4%), heating furnace or boiler efficiency and reduces; Dust stratification easily makes the metal pipe-wall hot-spot, reduce heating surface service life, causes the boiler tubes explosion to be leaked; Because of a large amount of dust stratifications exists, make the runner of heat exchanger narrow down, the through-current capability of flue gas reduces greatly, and the EIAJ of heating furnace or boiler can reduce by 70%; Dust stratification can make the exhaust gases passes resistance increase in addition, requires the heating furnace of negative pressure operation, and in fact little negative pressure even operation under positive pressure have a strong impact on the stable operation of heating furnace or boiler.Developed various soot blowers both at home and abroad already, as steam soaking, pressure-air ash disposal, sonic soot cleaning, steel ball ash disposal, hydraulic(-ash) sluicing, vibration ash disposal and the ash disposal of combustion gas high energy etc.All are above-mentioned except that best with combustion gas high energy dedusting effect in the gray technology.
Shown in Figure 1 is the structure chart of existing combustion gas high energy ash handling equipment, mainly be to prevent that by blending tank 1, tempering jar 2, some cupping jar 3, Impulsive tank 4 and impulse jet nozzle 5 from being constituted, combustion gas, air (in the explosion limit) by a certain percentage enter blending tank 1 successively by pipeline, and tempering prevents that jar 2 ', some cupping jar 3, Impulsive tank 4 are until being full of impulse jet nozzle 5; When in case mist is full of impulse jet nozzle 5, igniting immediately.Mist in a cupping jar 3 through high-frequency ignition, detonation in Impulsive tank, volume sharply expands, produce the air-flow of high temperature, high pressure, in nozzle enters stove, and release energy, repeatedly reflect through heating surface tube bank, furnace wall and fill the air the whole gray surface of waiting to remove with impact kinetic energy, acoustic energy, heat energy form, make dust stratification relax, come off, thereby reach the purpose of ash disposal.
It is higher that combustion gas high energy pulse ash handling equipment blows the heating surface regional temperature of ash, and its high-temperature area temperature is 700-1200 ℃, because high-temperature flue gas causes the ash handling equipment advanced ignition to the direct contact and the radiation of mist, the phenomenon of 2 sound occurs.Work capacity descends, and does not reach the good result of ash disposal.
Summary of the invention
Technical problem to be solved by this invention is, above-mentioned deficiency at prior art, and provide a kind of high-temperature flue gas that cuts off to contact with the direct of mist in the ash handling equipment, reduce the bad interference of high-temperature flue gas, prevent the method and the air curtain apparatus of combustion gas high energy pulse ash handling equipment high temperature two sound ash handling equipment work.
Air curtain apparatus provided by the present invention is realized by following technical scheme.
A kind of method that prevents combustion gas high energy pulse ash handling equipment high temperature two sound, described combustion gas high energy pulse ash handling equipment is to prevent that by blending tank, tempering jar, some cupping jar, Impulsive tank and impulse jet nozzle from being constituted, it is characterized in that: between Impulsive tank and impulse jet nozzle, form an air curtain, described air curtain has certain blast, utilize this air curtain to stop mist with certain blast, improve mixture pressure in some cupping jar, the Impulsive tank, cut off high-temperature flue gas and contact with the direct of mist in the ash handling equipment.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents.
The described method that prevents combustion gas high energy pulse ash handling equipment high temperature two sound, it is characterized in that: described blast is 0.1-0.4MPa, that preferable is 0.2MPa.
The present invention also provides a kind of air curtain apparatus of realizing said method.
A kind of air curtain apparatus of realizing described method, be installed between Impulsive tank and the impulse jet nozzle, it is characterized in that: one connects the siphunculus of described Impulsive tank and impulse jet nozzle, is provided with tuyere in the tube wall of siphunculus, on the tube wall of the tuyere outside siphunculus room is arranged, room is provided with blast pipe.
Described air curtain apparatus is characterized in that: described tuyere is a plurality of being distributed on the siphunculus tube wall; Described room is the annular room of being located on the tube wall of tuyere outside siphunculus.
Described air curtain apparatus is characterized in that: described annular room is to be welded by the ring flat-plate that siphunculus, outer tube and two are located between the siphunculus outer tube.
Described air curtain apparatus is characterized in that: described a plurality of tuyeres that are distributed on the siphunculus tube wall are narrow slit type tuyere.
Described air curtain apparatus is characterized in that: the described seam type tuyere that is distributed on the siphunculus tube wall is three, and the width of each seam type tuyere is 3mm, and two ends and siphunculus line of centres angle are greater than 120 °.
Described air curtain apparatus is characterized in that: described a plurality of tuyeres that are distributed on the siphunculus tube wall are the pass tuyere.
Described air curtain apparatus is characterized in that: the described pass tuyere that is distributed on the siphunculus tube wall is two rows, and the aperture is 4mm, and adjacent two hole centre-to-centre spacing are 6mm, and two rounds are staggered, and array pitch is 4mm.
The invention has the advantages that:
Method proposed by the invention and device effectively cut off high-temperature flue gas and contact with the direct of mist in the ash handling equipment, reduce the bad interference of high-temperature flue gas to ash handling equipment work.
For architectural feature of the present invention and effect thereof are had further understanding, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the structure principle chart of existing high energy pulse ash handling equipment.
Fig. 2 is the structure principle chart that the present invention has the high energy pulse ash handling equipment of air curtain apparatus.
Fig. 3 is a kind of example structure figure of air curtain apparatus of the present invention.
Fig. 4 is the profile of Fig. 3, shows the mutual alignment of a plurality of seam type tuyeres.
Fig. 5 is the another kind of example structure figure of air curtain apparatus of the present invention.
The specific embodiment
The present invention works under the hot conditions for preventing combustion gas high energy pulse ash handling equipment, mist contacts with high-temperature flue gas, or be subjected to hyperthermia radiation, cause the ash handling equipment advanced ignition, the phenomenon that two sound occur, work capacity is descended, do not reach the good result of ash disposal, and propose a kind of method that prevents two sound.Described combustion gas high energy pulse ash handling equipment is to prevent that by blending tank, tempering jar, some cupping jar, Impulsive tank and impulse jet nozzle from being constituted.The reason that analysis appearance two sound can influence work capacity is advanced ignition, promptly before a certain proportion of flammable mist also is not full of each container in the ash handling equipment fully, promptly lighted at the impulse jet nozzle place, can't make the degree of filling and the pressure of mist in the Impulsive tank reach optimum value, therefore can not produce the predetermined pressure that fires, on the other hand, mix body and contact with high-temperature flue gas, or be subjected to hyperthermia radiation, cause the ash handling equipment advanced ignition.Ignition point is at the impulse jet nozzle mouth, gas unrestricted free wxpansion under atmospheric conditions of expanding rapidly, and no impact effect so work capacity is descended, does not reach the good result of ash disposal.And the ignition point of normal ignition is in a cupping jar, lights the gas that expands rapidly the back and is subjected to the container restriction, produces immense pressure, produces high energy pulse through the pulse generation tank, thereby has good dedusting effect.It is contemplated that if between Impulsive tank and impulse jet nozzle, establish a switch, before igniting, stop combustion mixture to discharge impulse jet nozzle, yet general mechanical switch can not stand the impact of HTHP exploded gas.The present inventor has proposed the solution of a kind of gas plug (air curtain).
Concrete grammar is:
Between Impulsive tank and impulse jet nozzle, form an air curtain, described air curtain has certain blast, utilize this air curtain to stop mist, improve mist degree of filling and pressure in some cupping jar, the Impulsive tank, cut off high-temperature flue gas and contact with the direct of mist in the ash handling equipment with certain blast.In case igniting, described air curtain can not stop going out of high energy pulse gas.
Blast for described air curtain has certain requirement, and its pressure should be greater than the pressure of mist.Generally can be 0.1-0.4MPa, preferably is 0.2MPa.
The present invention also provides a kind of air curtain apparatus of realizing said method.Described air curtain apparatus is installed in the combustion gas high energy pulse ash handling equipment as shown in Figure 2, described combustion gas high energy pulse ash handling equipment is to prevent that by blending tank 1, tempering jar 2, some cupping jar 3, Impulsive tank 4 and impulse jet nozzle 5 from being constituted, this device is a prior art, is not described in detail.Described air curtain apparatus 6 specifically is to be installed between Impulsive tank 4 and the impulse jet nozzle 5.
Shown in Figure 3 is a kind of structure chart of air curtain apparatus: described air curtain apparatus has the siphunculus 7 of a described Impulsive tank 4 of connection and impulse jet nozzle 5, tube wall in siphunculus 7 is provided with tuyere 8, in tuyere 8 outsides, room 9 is arranged on the tube wall of siphunculus 7, room 9 is provided with blast pipe 10.Described tuyere 8 is a plurality of being distributed on the siphunculus tube wall; Described room 9 is located on the tube wall of tuyere outside siphunculus 7.Described room 9 is to be welded by the ring flat-plate 12 that siphunculus 7, outer tube 11 and two are located between siphunculus, the outer tube.
In specific embodiment shown in Figure 3, described a plurality of tuyeres 8 that are distributed on the siphunculus tube wall are the narrow slit type.
The described a plurality of seam type tuyeres that are distributed on the siphunculus tube wall can be 3, and the width of each seam type tuyere is 3mm, and two ends and siphunculus line of centres angle are 130 °.Certainly, its quantity also can be 4,5 or more a plurality of.Therefore the overlapped sub-fraction of adjacent two seam type tuyeres is designed to two ends and siphunculus line of centres angle is 130 ° (shown in Figure 4).
Shown in Figure 5 is the another kind of structure chart of air curtain apparatus.In this embodiment, described a plurality of tuyere that is distributed on the siphunculus tube wall is a pass tuyere 8 '.The described pass tuyere 8 ' that is distributed on the siphunculus tube wall is two rows, and the aperture is 4mm, and adjacent two hole centre-to-centre spacing are 6mm, and two rounds are staggered, and array pitch is 4mm.
The course of work: feed compressed air by blast pipe 10, in the siphunculus 7 of air curtain apparatus, form air curtain, on the one hand mist is played certain barrier effect, make mist keep certain pressure, make the high-temperature flue gas can't reverse access to plant on the other hand, thereby ash handling equipment can be inflated and light a fire normally, the work capacity of assurance device.
Claims (10)
1, a kind of method that prevents combustion gas high energy pulse ash handling equipment high temperature two sound, described combustion gas high energy pulse ash handling equipment is to prevent that by blending tank, tempering jar, some cupping jar, Impulsive tank and impulse jet nozzle from being constituted, it is characterized in that: between Impulsive tank and impulse jet nozzle, form an air curtain, described air curtain has certain blast, utilize this air curtain to stop mist with certain blast, improve mixture pressure and degree of filling in some cupping jar, the Impulsive tank, cut off high-temperature flue gas and contact with the direct of mist in the ash handling equipment.
2, the method that prevents combustion gas high energy pulse ash handling equipment high temperature two sound according to claim 1, it is characterized in that: described blast is 0.1-0.4MPa.
3, the method that prevents combustion gas high energy pulse ash handling equipment high temperature two sound according to claim 2, it is characterized in that: described blast is 0.2MPa.
4, a kind of air curtain apparatus of realizing the described method of claim 1, be installed between Impulsive tank and the impulse jet nozzle, it is characterized in that: one connects the siphunculus of described Impulsive tank and impulse jet nozzle, tube wall in siphunculus is provided with tuyere, on the tube wall of the tuyere outside siphunculus room is arranged, room is provided with blast pipe.
5, air curtain apparatus according to claim 4 is characterized in that: described tuyere is a plurality of being distributed on the siphunculus tube wall; Described room is the annular room of being located on the tube wall of tuyere outside siphunculus.
6, air curtain apparatus according to claim 4 is characterized in that: described room is to be welded by the ring flat-plate that siphunculus, outer tube and two are located between the siphunculus outer tube.
7, air curtain apparatus according to claim 5 is characterized in that: described a plurality of tuyeres that are distributed on the siphunculus tube wall are narrow slit type tuyere.
8, air curtain apparatus according to claim 7 is characterized in that: the described narrow slit type tuyere that is distributed on the siphunculus tube wall is three, and the width of each narrow slit type tuyere is 3mm, and two ends and siphunculus line of centres angle are greater than 120 °.
9, air curtain apparatus according to claim 5 is characterized in that: described a plurality of tuyeres that are distributed on the siphunculus tube wall are the pass tuyere.
10, air curtain apparatus according to claim 9 is characterized in that: the described pass tuyere that is distributed on the siphunculus tube wall is two rows, and the aperture is 4mm, and adjacent two hole centre-to-centre spacing are 6mm, and two rounds are staggered, and array pitch is 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100598133A CN100470156C (en) | 2006-03-15 | 2006-03-15 | Method for preventing two-explosion gas high-energy impulse dusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100598133A CN100470156C (en) | 2006-03-15 | 2006-03-15 | Method for preventing two-explosion gas high-energy impulse dusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038079A CN101038079A (en) | 2007-09-19 |
| CN100470156C true CN100470156C (en) | 2009-03-18 |
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| CNB2006100598133A Expired - Fee Related CN100470156C (en) | 2006-03-15 | 2006-03-15 | Method for preventing two-explosion gas high-energy impulse dusting device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102410526A (en) * | 2011-12-15 | 2012-04-11 | 杭州新世纪能源环保工程股份有限公司 | Corrosion-protection type fuel pulse generation device of constant-positive-pressure nozzle |
| CN104930526B (en) * | 2015-07-03 | 2018-01-09 | 北京光华纺织集团有限公司 | A kind of curtain air system for shock-wave ash blowing |
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2006
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Non-Patent Citations (2)
| Title |
|---|
| 贯流风幕及其应用. 胡宜珍.食品与发酵工业，第02期. 1984 |
| 贯流风幕及其应用. 胡宜珍.食品与发酵工业，第02期. 1984 * |
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| CN101038079A (en) | 2007-09-19 |
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Granted publication date: 20090318 Termination date: 20120315 |