CN101463998A - Gas shock wave ash removing system equipped with Archimedes spiral accelerator - Google Patents
Gas shock wave ash removing system equipped with Archimedes spiral accelerator Download PDFInfo
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- CN101463998A CN101463998A CNA2009100763416A CN200910076341A CN101463998A CN 101463998 A CN101463998 A CN 101463998A CN A2009100763416 A CNA2009100763416 A CN A2009100763416A CN 200910076341 A CN200910076341 A CN 200910076341A CN 101463998 A CN101463998 A CN 101463998A
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- combustible gas
- archimedes spiral
- shock wave
- flow meter
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Abstract
The invention provides a fuel gas shock wave ash disposal system equipped with an Archimedes spiral accelerating installation, comprising a combustible gas pipeline, a combustible gas valve, a combustible gas flow meter and an air duct, an air valve and an air flow meter; the combustible gas valve and the combustible gas flow meter are connected in sequence by the combustible gas pipeline, the air valve and the air flow meter are connected in sequence by the air duct, the combustible gas flow meter is connected with a premixer by the combustible gas pipeline, the air flow meter is connected with the premixer by the air duct, the right end of the premixer is connected with an igniter by a premixing pipeline, the igniter is connected with an Archimedes spiral explosion mixture space formed by arranging pins in the explosion tube, the explosion mixture space is connected with an output tube. In the invention, pins are arranged on the inner wall of the explosion tube according to the Archimedes spiral, thus forming a disturbed cone-type structure, therefore, pressure at the outlet of the explosion mixture space is greatly increased and fuel gas shock wave with powerful pulse energy is generated when cleaning ash of high viscosity and high adhesive attraction on a heat exchange surface, ensuring better ash removal effect.
Description
Technical field
The present invention relates to be used for ash handling equipment, relate in particular to the gas shock wave ash disposal system of configuration Archimedes spiral accelerator boiler heating surface.Belong to boiler heating surface ash handling equipment technical field.
Background technology
The coal burning boiler of power station back-end surfaces is long-pending big, is a more insoluble problem always.Especially the boiler of burning low grade coal, because of the too high calorific value of ash content in its raw coal is lower again, it is extremely insufficient to burn, and it is more outstanding that the problem of dust stratification just seems, also can cause great production accident when serious.It is commonly used that to remove gray technology be to utilize HCS to blow ash, its principle be high velocity vapor stream continuously by the bonding force that entrainments, carries secretly, effect such as impact destroys dust stratification and the surface of solids, make dust disengaging dust stratification surface.The problem that this mode exists is owing to water entrained by steam, increases the humidity of flue gas, and the bonding condition that provides of dust stratification is provided, and particularly for high calcium ash, dust stratification and obstruction is aggravated.Also have a kind of sonic soot cleaning that is,, on the one hand gas molecule and dust particle are vibrated, dust particle can not be deposited at heat exchange surface when sound wave is done the time spent; May make thin heat exchange surface that extremely slight vibration takes place on the other hand, dust particle is owing to the effect of inertia force or distortion shearing force breaks away from the dust stratification surface.But this method is lower because of its energy, is helpless for compact conformation, the more serious rotary regenerative air preheater of dust stratification.And in modern power industry, the fire coal of most Generator Set or oil burning boiler nearly all are to use this efficient, compact rotary regenerative air preheater.Therefore the method for sonic soot cleaning has its unsurmountable limitation.
Current, China energy-saving and emission-reduction as an important indicator, the fume afterheat that produces in a large amount of metallurgical furnaces all reclaims generating, but because metallurgical gas contains a large amount of metal oxide dust, when reclaiming fume afterheat, the metal oxide dust can be securely attached on the residual heat boiler for exchanging heat face, and the pulse ash disposal system of using at present, its impulse generator adopts light pipe substantially, and the pulse energy of generation also is not enough to remove this metal oxide dust.
Summary of the invention
The objective of the invention is in order to overcome the deficiencies in the prior art, a kind of gas shock wave ash disposal system that disposes the Archimedes spiral accelerator is provided.
The present invention is achieved by the following technical solutions:
A kind of gas shock wave ash disposal system that disposes the Archimedes spiral accelerator, comprise the combustible gas pipeline, the combustible gas valve, the combustible gas flow is taken into account air duct, air door, mass air flow sensor, described combustible gas valve, combustible gas flow meter connects from left to right successively by described combustible gas pipeline, described air door, mass air flow sensor connects from left to right successively by air duct, described combustible gas flow meter is connected with premixed device by the combustible gas pipeline, described mass air flow sensor is connected with premixed device by air duct, the right-hand member of described premixed device is connected with igniter by the premix pipeline, described igniter connects the detonation chamber that is arranged in the Archimedes spiral that the explosion tube inwall forms by pin, described detonation chamber connection efferent duct.
And described pin evenly is arranged on the inwall of described explosion tube circumferencial direction with Archimedean spiral type.
And the Archimedes spiral spacing L in the described explosion tube is the diameter D of 0.5-2 times of explosion tubes.
And, the upper vertebra surface diameter d of the Archimedes spiral disturbance vertebra shape in the described explosion tube
1Be the diameter D of 0.6-0.9 times of explosion tube.
And, the lower vertebra surface diameter d of the Archimedes spiral disturbance vertebra shape in the described explosion tube
2Be the diameter D of 0.1-0.3 times of explosion tube.
And 4-20 described pins of the circumferential directions of described explosion tube inwall, pin are that round steel is manufactured and formed, and are different in size.
Explosion tube inwall of the present invention sets in advance barrier, when fuel gas passes through the combustible gas pipeline, the combustible gas valve, combustible gas flow meter is at premixed device and pass through air duct, air door, after mass air flow sensor and the air that comes mix, pass through the premix pipeline again, light a fire by igniter, it is pin that flame sets in advance barrier through explosion tube, the flame place of arrival, then can change the distortion and the disturbance of the fluid micellar of the upstream of flowing, the wake flow flow pattern that the difference of arranging owing to barrier (being pin) produces will influence flowing of unburned gas, and the wake flow flow pattern depends on the shape and size and the flowing velocity of barrier.After entering the barrier perturbing area, flame will be distorted and gauffer, and the flame surface area significantly increases, its result increases burn rate, and the corresponding energyreleaserate that increased, and flame speed increases, and the flame speed increase can strengthen turbulence intensity, and therefore, this is a positive feedback mechanism.In the downstream of barrier, disturbance in the flow field and distortion will weaken, and remove nonflame and can keep turbulent propagation self-holdingly, otherwise it must be adaptive to local airflow.Certainly, if in explosion tube, repeat to be provided with the sufficient amount barrier, preferably, it is barrier that 4-20 root pin is set on the explosion tube inwall circumference, and pin is perpendicular to the setting of explosion tube inwall, then disturbance in the flow field and distortion will be kept, thereby may excite above-mentioned positive feedback mechanism, then flame constantly quickens, and pressure constantly raises, last shock wave is sprayed by efferent duct, to removing laying dust obvious effects is arranged.
The principal element that causes flame propagation to be quickened has: (1) is because the unburned gas that the rising of the gas specific volume of flame propagation district (in the explosion tube) causes mobile; (2) distortion and the disturbance of the fluid micellar that causes owing to the existence of boundary layer and/or barrier; (3) interaction of the distortion of flame and fluid micellar and disturbance.
The present invention is with respect to the beneficial effect of prior art:
1, the present invention is owing to be provided with pin according to Archimedes spiral on the explosion tube inwall of detonation chamber, form disturbance vertebra shape structure, thereby, the outlet pressure of detonation chamber increases substantially, when the high viscosity on the removing heat-transfer surface, the dust of high adhesion force, can produce the gas shock wave of powerful pulse energy, make dedusting effect better.
2, the present invention can be designed to different " Archimedes spiral " perturbations according to the order of severity of collecting ash, can adjust the surge pressure of impulse wave easily and accurately, thereby intensity of wave is impacted in control, guarantee efficient ash disposal, guarantee the boiler heat exchange efficiency, guarantee the equipment security of operation.
3, the present invention is simple in structure, easy to use, is widely used in various industrial circle dust stratifications with burning structure and removes.
Description of drawings
Fig. 1 is the gas shock wave ash disposal system structural representation of configuration Archimedes spiral accelerator of the present invention;
Fig. 2 is the gas shock wave ash disposal system detonation chamber schematic diagram of configuration Archimedes spiral accelerator of the present invention;
Fig. 3 is the gas shock wave ash disposal system detonation chamber profile of configuration Archimedes spiral accelerator of the present invention;
The different fuel gas that Fig. 4 is adopted for the gas shock wave ash disposal system of configuration Archimedes spiral accelerator of the present invention in explosion tube maximum pressure with the strength of turbulence variation diagram.
The specific embodiment
For can being known, one of ordinary skill in the art understands technical scheme of the present invention, existing in conjunction with the accompanying drawings to the further explanation at large of the specific embodiment of the present invention do:
As shown in Figure 1, a kind of gas shock wave ash disposal system that disposes the Archimedes spiral accelerator of the present invention, comprise combustible gas pipeline 1, combustible gas valve 2, combustible gas flow meter 3 and air duct 4, air door 5, mass air flow sensor 6, combustible gas valve 2, combustible gas flow meter 3 connects from left to right successively by combustible gas pipeline 1, air door 5, mass air flow sensor 6 connects from left to right successively by air duct 4, combustible gas flow meter 3 is connected with premixed device 7 by combustible gas pipeline 1, mass air flow sensor 6 is connected with premixed device 7 by air duct 4, the right-hand member of premixed device 7 is connected with igniter 9 by premix pipeline 8, igniter 9 connects the detonation chamber 10 that is arranged in the Archimedes spiral that explosion tube 101 inwalls form by pin 102, detonation chamber 10 connection efferent ducts.
Further, pin 102 spirallies evenly are arranged on the explosion tube 101 circumferencial direction inwalls.As shown in Figures 2 and 3.
Further, the spacing L of the Archimedes spiral of explosion tube 101 inwalls is the diameter D of 0.5-2 times of explosion tubes 101.As shown in Figure 2.
Further, upper vertebra surface 104 diameter d of the Archimedes spiral disturbance vertebra shape of explosion tube 101 inwalls
1It is the diameter of 0.6-0.9 times of explosion tube 101.As shown in Figure 3.
Further, lower vertebra surface 103 diameter d of the Archimedes spiral disturbance vertebra shape of explosion tube 101 inwalls
2It is the diameter of 0.1-0.3 times of explosion tube 101.As shown in Figure 3.
Further, 4-20 pins of circumferential directions 102 of explosion tube 101 inwalls.As shown in Figure 2.
Embodiment 1: as shown in Figure 1, combustible gas and air are respectively via combustible gas pipeline 1, combustible gas valve 2, combustible gas flow meter 3 and air duct 4, air door 5, mass air flow sensor 6 enters premixed device 7, premix gas enters detonation chamber 10 through premix pipeline 8, the formation premixed flame entered detonation chamber 10 after igniter 9 was lighted premix gas, be furnished with the Archimedes spiral disturbance device that barrier pin 102 is formed in the detonation chamber 10, the quantity of pin 102 is provided with according to explosion tube 101 circumferencial direction 4-20 roots, because flame front and Archimedes spiral disturbance device form positive feedback mechanism, flame constantly quickens, pressure improves constantly, last shock wave is sprayed by efferent duct, act directly on the heat-transfer surface, reach efficient ash disposal, guarantee the effect of boiler heat exchange.The combustible gas flow that enters premixed device 7 can be regulated by combustible gas valve 2, the air that enters premixed device 7 can be regulated by air door 5, and combustible gas flow meter 3, mass air flow sensor 6 are respectively applied for combustible gas flow and the air mass flow that is metered in the premixed device 7.
Embodiment 2: reach as shown in Figure 3 as Fig. 2, explosion tube 101 is generally cylindrical shape, pin 102 evenly is arranged on the explosion tube 101 circumferencial direction inwalls according to Archimedean spiral type, and the spacing L of the Archimedes spiral of explosion tube 101 inwalls is the diameter D of 0.5-2 times of explosion tubes 101.Upper vertebra surface 104 diameter d of the Archimedes spiral disturbance vertebra shape of explosion tube 101 inwalls
1Be the diameter D of 0.6-0.9 times of explosion tube 101.Lower vertebra surface 103 diameter d of the Archimedes spiral disturbance vertebra shape of explosion tube 101 inwalls
2Be the diameter D of 0.1-0.3 times of explosion tube 101.4-20 pins of circumferential directions 102 of explosion tube 101 inwalls, pin 102 are perpendicular to explosion tube 101 inwalls, and pin 102 is manufactured for round steel and formed.
Embodiment 3: as shown in Figure 4, different fuel gas after explosion tube 101 internal combustion the pressure that produces inequality, as methane, water-gas, acetylene, hydrogen etc., the maximum pressure that above-mentioned fuel gas is produced in explosion tube 101 is inequality with the strength of turbulence variation tendency.Therefore, can be according to the firm degree of laying dust be selected different fuel gas, to reach best removing effect.
Claims (6)
1, a kind of gas shock wave ash disposal system that disposes the Archimedes spiral accelerator, it is characterized in that, comprise combustible gas pipeline (1), combustible gas valve (2), combustible gas flow meter (3) and air duct (4), air door (5), mass air flow sensor (6), described combustible gas valve (2), combustible gas flow meter (3) connects from left to right successively by described combustible gas pipeline (1), described air door (5), mass air flow sensor (6) connects from left to right successively by air duct (4), described combustible gas flow meter (3) is connected with premixed device (7) by combustible gas pipeline (1), described mass air flow sensor (6) is connected with premixed device (7) by air duct (4), the right-hand member of described premixed device (7) is connected with igniter (9) by premix pipeline (8), described igniter (9) connects the detonation chamber (10) that is arranged in the Archimedes spiral that explosion tube (101) inwall forms by pin (102), described detonation chamber (10) connection efferent duct.
2, the gas shock wave ash disposal system of configuration Archimedes spiral accelerator according to claim 1 is characterized in that: described pin (102) evenly is arranged on described explosion tube (101) the circumferencial direction inwall by Archimedean spiral type.
3, the gas shock wave ash disposal system of configuration Archimedes spiral accelerator according to claim 1 and 2 is characterized in that: the Archimedes spiral spacing in the described explosion tube (101) is the diameter of 0.5-2 times of explosion tubes (101).
4, according to the gas shock wave ash disposal system of any described configuration Archimedes spiral accelerator in the claim 1 to 3, it is characterized in that: upper vertebra surface (104) diameter of the Archimedes spiral disturbance vertebra shape in the described explosion tube (101) is the diameter of 0.6-0.9 times of explosion tube (101).
5, according to the gas shock wave ash disposal system of any described configuration Archimedes spiral accelerator in the claim 1 to 4, it is characterized in that: lower vertebra surface (103) diameter of the Archimedes spiral disturbance vertebra shape in the described explosion tube (101) is the diameter of 0.1-0.3 times of explosion tube (101).
6, the gas shock wave ash disposal system of configuration Archimedes spiral accelerator according to claim 2 is characterized in that, 4-20 described pins of circumferential directions (102) of described explosion tube (101) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100763416A CN101463998A (en) | 2009-01-13 | 2009-01-13 | Gas shock wave ash removing system equipped with Archimedes spiral accelerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100763416A CN101463998A (en) | 2009-01-13 | 2009-01-13 | Gas shock wave ash removing system equipped with Archimedes spiral accelerator |
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| CN101463998A true CN101463998A (en) | 2009-06-24 |
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| CNA2009100763416A Pending CN101463998A (en) | 2009-01-13 | 2009-01-13 | Gas shock wave ash removing system equipped with Archimedes spiral accelerator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642172A (en) * | 2016-09-21 | 2017-05-10 | 北京宸控科技有限公司 | Flame accelerating duct |
| CN109335748A (en) * | 2018-09-30 | 2019-02-15 | 北京晟时电力科技有限公司 | Mobile clear library device and control method |
| EP3708942A1 (en) * | 2019-03-12 | 2020-09-16 | Lushkevich, Leonid | Pulse soot blower |
-
2009
- 2009-01-13 CN CNA2009100763416A patent/CN101463998A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642172A (en) * | 2016-09-21 | 2017-05-10 | 北京宸控科技有限公司 | Flame accelerating duct |
| CN109335748A (en) * | 2018-09-30 | 2019-02-15 | 北京晟时电力科技有限公司 | Mobile clear library device and control method |
| EP3708942A1 (en) * | 2019-03-12 | 2020-09-16 | Lushkevich, Leonid | Pulse soot blower |
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Open date: 20090624 |