CN204672113U - Ozone flue gas mixing arrangement and flue gas denitrification system - Google Patents
Ozone flue gas mixing arrangement and flue gas denitrification system Download PDFInfo
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- CN204672113U CN204672113U CN201520031930.3U CN201520031930U CN204672113U CN 204672113 U CN204672113 U CN 204672113U CN 201520031930 U CN201520031930 U CN 201520031930U CN 204672113 U CN204672113 U CN 204672113U
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Abstract
The utility model discloses a kind of ozone flue gas mixing arrangement and flue gas denitrification system, comprise the playpipe row be fixedly mounted in flue, vertical duct row and transverse pipe row are drawn together in playpipe package, form by the many playpipes arranged by uniform distances and flue cross section is divided into multiple mixed zone; Playpipe has the spout of bar shaped on the tube wall of flue gas flow direction side; Eddy flow mechanism is provided with outside spout, eddy flow mechanism comprises arc-shaped backplate, backplate is fastened on playpipe periphery, its lateral ends has symmetrical screw, be provided with bolt in screw, backplate is fixed on playpipe by bolt and screw cooperation, and backplate is provided with the groove exposing spout, be fixed with helical blade along vent length direction in groove, helical blade and spout have inclination angle.The utility model overcomes the problem of ozone and oxygen mix speed and degree of depth deficiency, increases the mixed area of ozone and flue gas, improves denitrating flue gas rate, also has that processing technology is simple, cost of investment is low simultaneously, easy to use with maintenance etc. advantage.
Description
Technical field
The utility model relates to denitration of boiler smoke technical field, particularly relates to a kind of the ozone flue gas mixing arrangement and the flue gas denitrification system that adopt oxidizing process denitration.
Background technology
Take coal as the various power-equipments that fuel provides heat energy, very common in production and life, the such as boiler etc. of power plant, steam power plant, coal can form the flue gas containing a large amount of nitrogen oxide in the process of burning, directly discharge meeting pollutant atmosphere, needs to carry out denitrogenation (i.e. denitration) process before discharging.
Existing method of denitration mainly contains reducing process and oxidizing process, and wherein applying more reducing process is utilize ammonia as denitrfying agent, under the effect of ammonia, decompose nitrogen oxides is become nitrogen and water.But the shortcoming that ubiquity denitration rate is lower, in addition, equipment investment is high, floor space is large; Ammonia easily produces escape, and then forms heating surface and the body of sulfate of ammoniac corrosion boiler tail, adds operation and the maintenance cost of boiler.Oxidizing process is a kind of new denitrating technique, and it utilizes ozone as oxidant, and the NO in nitrogen oxide is oxidized to NO
2, then with water or alkaline solution absorption.Because ozone has good oxidation susceptibility, the denitration rate of oxidizing process is higher, and ozone is escaped also can not form subsequent contamination and corrosion.Different with the characteristic that ammonia sprays into flue gas mixing as denitrfying agent, the less stable of ozone, easily decomposes, and the overlong time or uneven of ozone and flue gas mixing, will affect the efficiency of ozone denitration, also do not have good ozone and flue gas mixing arrangement at present.
Utility model content
The utility model provides a kind of ozone flue gas mixing arrangement and flue gas denitrification system, and in order to solve the problem of ozone and flue gas mixing velocity and degree of depth deficiency in prior art, the incorporation time of both increases and area, improve ozone denitration rate.
The utility model is achieved by the following technical programs:
A kind of ozone flue gas mixing arrangement, comprise the playpipe row be fixedly mounted in flue, vertical duct row and transverse pipe row are drawn together in described playpipe package, form by the many playpipes arranged by uniform distances, flue cross section is separated into the mixed flow district of multiple area equilibrium by its vertical and horizontal playpipe; Described playpipe has the spout of bar shaped at flue gas flow direction side pipe wall, and described spout is provided with many places at the length direction of playpipe by uniform distances; Eddy flow mechanism is provided with outside described spout, described eddy flow mechanism comprises the backplate of arc-shaped, backplate is fastened on playpipe periphery, its lateral ends has symmetrical screw, be provided with bolt in screw, backplate is fixed on playpipe by bolt and screw cooperation, and described backplate is provided with the groove that can expose spout, be fixed with helical blade along vent length direction in groove, described helical blade and spout have the inclination angle of 20 ° ~ 60 °.
The ozone flue gas mixing arrangement that the utility model provides, playpipe row is provided with in the cross section of the vertical flue gas flow direction of flue, comprise transverse pipe row and vertical duct row, playpipe row be made up of the playpipe that many are arranged by uniform distances, and playpipe splits the mixed zone flow area of flue gas in flue being divided into multiple area equilibrium in length and breadth.Playpipe has the spout of multiple bar shaped, the mixed area of flue gas and ozone can be increased preferably.Have essential distinction with employing circular hole shower nozzle etc., bar shaped spout has better jet velocity and the degree of depth, to the good disturbance of flue gas flow field, lengthen with the time of smoke contacts mixing, flour mixed with adulterants increases, thus makes mixing of ozone and flue gas, improves the oxidability of ozone.Ozone gas enters from playpipe entrance, and meet to flue gas ejection from the spout of bar shaped, same periphery is symmetrically arranged with two spouts with the center of circle, and spout and flue gas form certain angle cross jet, ensure interacting depth.Spout in a mixed zone on playpipe forms orthogonal many distributions, can guarantee ozone and flue gas Homogeneous phase mixing, reduces mixing blind area.In order to improve ozone from the disturbance of spout ejection to flue gas, eddy flow mechanism is provided with outside spout, ozone is through the helical blade of eddy flow mechanism, streams of ozone can be split and produce certain rotation radian, flue gas is driven to enter eddy flow dynamic, the disturbance of two kinds of air-flows is strengthened, and the face of mixing extends, and mixed effect is better.The eddy flow mechanism being simultaneously arranged on playpipe periphery also has the effect preventing smoke dust to be deposited on spout, and formation to be washed away through helical blade and taken away dust preferably and avoids dust stratification to block spout by streams of ozone.Arranged by said structure, make the efficiency of ozone oxidation better, ensure that higher ozone denitration efficiency.The ozone automatic classifying that avoid that ozone mixing velocity is slow, incorporation time is long etc. causes, the negative effects such as oxidation efficiency reduction.
In order to realize the purpose of this utility model further, can also by the following technical programs:
Described spout is symmetrically arranged with two parallel spouts at the same periphery of playpipe, and the centerlines a between two spouts is 90 ° ~ 120 °; On playpipe length direction, the centre-to-centre spacing b of adjacent ports is 350 ~ 500mm.Described transverse pipe row is located at vertical duct row rear, and spacing c is between the two 30 ~ 150mm.Be furnished with 1 ~ 3 layer of playpipe row in described flue, spacing d is between layers 2 ~ 3m.Described vent length is 1 ~ 2.5 times of playpipe diameter, and its width is 1/5 ~ 1/8 times of playpipe diameter, and described spout outlet flow velocity is 2 ~ 3.5 times that spray velocity in pipes.
The utility model provides a kind of flue gas denitrification system, comprise ozone flue gas mixing arrangement as above and ozone generator, the outlet delivery main of described ozone generator, delivery main connects playpipe entrance by conveying arm, and described delivery main is equipped with flow control valve.
In above-mentioned flue gas denitrification system, on described conveying arm, respectively a point adjustable valve can also be installed.According to the situation of flue gas flow field and the concentration of nitrogen oxide, every root playpipe is carried out to adjustment and the distribution of ozone emitted dose.The on-line computing model detected nitrous oxides concentration is installed in flue, the signal output part of on-line computing model connects the controller of ozone generator or the executing agency of flow control valve, when nitrous oxides concentration is higher than setting value, improves the flow of ozone, guarantee the efficiency of denitration; When nitrous oxides concentration is lower than setting value, suitably can reduces the flow of ozone, realize economical operation, cost-saving, improve effects.
The utility model has the advantages that:
1, adopt transverse pipe row and vertical duct arrangement to put, make playpipe crisscross, the flow area of flue gas is divided into the mixed zone of multiple area equilibrium.Spout in each mixed zone on playpipe forms orthogonal many distributions, can guarantee ozone and flue gas Homogeneous phase mixing, reduces mixing blind area.
2, the same periphery of playpipe is symmetrically arranged with two spouts with the center of circle, spout and flue gas form certain angle cross jet, ensure interacting depth.
3, outside spout, eddy flow mechanism is provided with, strengthen ozone from the disturbance of spout ejection to flue gas, ozone is through the helical blade of eddy flow mechanism, streams of ozone can be split and produce certain rotation radian, flue gas is driven to enter eddy flow dynamic, the disturbance of two kinds of air-flows is strengthened, and flour mixed with adulterants extends, and mixed effect is better.
4, be arranged on the eddy flow mechanism of playpipe periphery, also have the effect preventing smoke dust to be deposited on spout, formation, through helical blade, is washed away and takes away dust preferably by streams of ozone, avoids dust stratification to block spout.
5, the utility model offers bar shaped spout on playpipe, and playpipe and spout integrate, and processing technology is simple, production efficiency is high, cost of investment is low, easy to use and maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model ozone flue gas mixing arrangement embodiment; Fig. 2 is the left view of Fig. 1; Fig. 3 is I partial enlargement structural representation in Fig. 1; Fig. 4 be in Fig. 3 A-A to sectional view; Fig. 5 is the structural representation of the utility model flue gas denitrification system embodiment.
Reference numeral: 1, flue; 2, playpipe row; 3, playpipe; 4, spout; 5, eddy flow mechanism; 6, backplate; 9, groove; 10, helical blade; 11, ozone generator; 12, flow control valve; 13, adjustable valve is divided; 14, delivery main; 15, arm is carried; 16, on-line computing model.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1 and Figure 2, a kind of ozone flue gas mixing arrangement of the present embodiment, comprise the playpipe row 2 be fixedly mounted in flue 1, this playpipe row 2 is furnished with transverse pipe row and vertical duct row, form by the many playpipes 3 arranged by uniform distances, its vertical and horizontal playpipe 3 splits staggered mixed zone flue 1 cross section being divided into multiple area equilibrium in length and breadth; In Fig. 2 and Fig. 4, the direction of arrow is the flow direction of flue gas.Playpipe 3 has the spout 4 of bar shaped at flue gas flow direction side pipe wall, and spout 4 is provided with many places at the length direction of playpipe 3 by uniform distances; Eddy flow mechanism 5 is provided with outside spout 4, as shown in Figure 3, Figure 4, this eddy flow mechanism 5 comprises the backplate 6 of arc-shaped, backplate 6 is fastened on playpipe 3 periphery, and its lateral ends has symmetrical screw, is provided with bolt in screw, backplate 6 is fixed on playpipe 3 by bolt and screw cooperation, backplate 6 is provided with the groove 9 that can expose spout, and be fixed with helical blade 10 along spout 4 length direction in groove 9, the inclination angle of helical blade 10 and spout 4 is 30 °.
Wherein, playpipe row 2 can adopt support to fix in flue 1, the difficulty that flue 1 increases seal construction is passed in order to reduce playpipe 3, ozone delivery main 14 can be adopted once through flue 1, and in flue 1, utilize conveying arm 15 and every root playpipe 3 to realize being connected, the mode connected can adopt multiple, such as, can be flange and bolt fit system, or adopts welding manner etc.Playpipe 3 can adopt carbon steel pipe, stainless steel tube etc. to make through milling machine processing bar shaped spout 4, and the operating mode in flue 1 is comparatively complicated, in order to extend the service life of playpipe 3, the playpipe 3 in flue 1 can be carried out preservative treatment.In order to avoid ozone is to the oxidation of flue 1 inwall, need behind mixed zone in flue 1 to carry out inner liner stainless steel transformation.
Specifically, the ozone flue gas mixing arrangement that the present embodiment provides, in flue 1, the cross section of vertical flue gas flow direction is provided with playpipe row 2, the playpipe 3 arranged by uniform distances by many is formed, and playpipe 3 splits the mixed zone flow area of flue gas in flue 1 being divided into multiple area equilibrium in length and breadth.Playpipe 3 has the spout 4 of multiple bar shaped, the mixed area of flue gas and ozone can be increased preferably.Have essential distinction with spouts such as adopting shower nozzle circular hole, bar shaped spout 4 has better jet velocity and the degree of depth, to the good disturbance of flue gas flow field, lengthen with the time of smoke contacts mixing, flour mixed with adulterants increases, thus makes mixing of ozone and flue gas, improves the oxidability of ozone.Ozone gas enters from playpipe 3 entrance, and meet to flue gas ejection from the spout 4 of bar shaped, the same periphery of playpipe 3 is symmetrically arranged with two spouts 4 with the center of circle, spout 4 and flue gas form certain angle cross jet, ensure interacting depth.Spout 4 in a mixed zone on playpipe 3 forms orthogonal many distributions, can guarantee ozone and flue gas Homogeneous phase mixing, reduces mixing blind area.Disturbance to flue gas is sprayed from spout 4 in order to improve ozone, eddy flow mechanism 5 is provided with outside spout 4, ozone is through the helical blade 10 of eddy flow mechanism 5, streams of ozone can be split and produce certain rotation radian, flue gas is driven to enter eddy flow dynamic, the disturbance of two kinds of air-flows is strengthened, and flour mixed with adulterants extends, and mixed effect is better.The eddy flow mechanism 5 being simultaneously arranged on playpipe 3 periphery also has the effect preventing smoke dust to be deposited on spout 4, and formation is washed away through helical blade 10 by streams of ozone, and takes away dust preferably, avoids dust stratification to block spout 4.Arranged by said structure, make the efficiency of ozone oxidation better, ensure that higher ozone denitration efficiency.The negative effect such as ozone automatic classifying, oxidation efficiency reduction that avoid that ozone mixing velocity is slow, incorporation time is long etc. causes.
Further, the spout 4 of the present embodiment is symmetrically arranged with parallel two at the same periphery of playpipe 3, and the centerlines a between two spouts 4 is 110 °, and on playpipe 3 length direction, the centre-to-centre spacing b of adjacent ports 4 is 450mm.According to the actual conditions of flue gas flow field, the layout of spout 4 angle and quantity can be carried out, improve the effect of crosswise jet, ensure the degree of depth and the effect of injection.
Further, the present embodiment transverse pipe row is located at vertical duct row rear, and spacing c is between the two 100mm.According to the mixed characteristic of ozone and flue gas, after transverse pipe row is arranged in vertical duct row, and certain spacing is set, the uniformity of mixing can be improved, extend the flour mixed with adulterants of ozone and flue gas.
Based on technique scheme, optionally, as shown in Figure 2, the present embodiment arranges that in flue 1 the playpipe row 2, spacing d between layers that haves three layers is 2.5m.Playpipe 2 is arranged to sandwich construction, is conducive to ensureing higher ozone denitration rate.Keep certain spacing between layers, the consumption of ozone can be saved, reduce operating cost.Spout 4 length is 2 times of playpipe 3 diameter, and its width is 1/6 times of playpipe 3 diameter, and spout 4 exit velocity is 2 ~ 3.5 times that spray velocity in pipes.Spout 4 area is little, and jet velocity and the degree of depth are better, but emitted dose is few; Contrary, spout 4 area is large, and the ozone amount provided is many, but speed and the degree of depth poor.Adopt spout 4 area and vibrational power flow that are applicable to, while there is good mixed performance, good ozone denitration rate can be realized, save the consumption of ozone, reduce operating cost.
As shown in Figure 5, present embodiments provide a kind of flue gas denitrification system, comprise ozone flue gas mixing arrangement as above, also comprise ozone generator 11, the outlet delivery main 14 of ozone generator 11, delivery main 14 connects playpipe 3 entrance by conveying arm 15, and delivery main 15 is equipped with flow control valve.Wherein, on conveying arm 15, a point adjustable valve can also be housed.The convenient situation according to flue gas flow field, carries out Flow-rate adjustment and distribution to the every root playpipe 3 in playpipe row 2.Also the on-line computing model 16 that can carry out nitrous oxides concentration detection can be installed in flue 1, the signal output part of on-line computing model 16 connects the controller of ozone generator 11 or the executing agency of flow control valve 12, when nitrous oxides concentration is higher than setting value, improve the flow of ozone, guarantee the efficiency of denitration; When nitrous oxides concentration is lower than setting value, suitably can reduces the flow of ozone, realize economical operation, cost-saving, improve effects.
Specifically, the flue gas denitrification system in the present embodiment, can adopt the ozone flue gas mixing arrangement in the utility model embodiment, and its concrete structure, see the record of above-described embodiment and accompanying drawing 1-5, does not repeat them here.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (7)
1. an ozone flue gas mixing arrangement, it is characterized in that, comprise playpipe row (2) be fixedly mounted in flue (1), described playpipe row (2) comprises vertical duct row and transverse pipe row, form by the many playpipes (3) arranged by uniform distances, flue (1) cross section is separated into the mixed flow district of multiple area equilibrium by its vertical and horizontal playpipe (3), described playpipe (3) has the spout (4) of bar shaped at flue gas flow direction side pipe wall, and described spout (4) is provided with many places at the length direction of playpipe (3) by uniform distances, eddy flow mechanism (5) is provided with outside described spout (4), described eddy flow mechanism (5) comprises the backplate (6) of arc-shaped, backplate (6) is fastened on playpipe (3) periphery, its lateral ends has symmetrical screw, bolt is provided with in screw, backplate (6) is fixed on playpipe (3) by bolt and screw cooperation, described backplate (6) is provided with the groove (9) that can expose spout, helical blade (10) is fixed with along spout (4) length direction in groove (9), described helical blade (10) and spout (4) have the inclination angle of 20 ° ~ 60 °.
2. ozone flue gas mixing arrangement according to claim 1, it is characterized in that, described spout (4) is symmetrically arranged with parallel two at playpipe (3) same periphery, and the centerlines a between two spouts (4) is 90 ° ~ 120 °; On playpipe (3) length direction, the centre-to-centre spacing b of adjacent ports (4) is 350 ~ 500mm.
3. ozone flue gas mixing arrangement according to claim 1, is characterized in that, described transverse pipe row is located at vertical duct row rear, and spacing c is between the two 30 ~ 150mm.
4. ozone flue gas mixing arrangement according to claim 1, is characterized in that, is furnished with 1 ~ 3 layer of playpipe row (2) in described flue (1), and playpipe row (2) spacing d is between layers 2 ~ 3m.
5. ozone flue gas mixing arrangement according to claim 1, it is characterized in that, described spout (4) length is 1 ~ 2.5 times of playpipe (3) diameter, its width is 1/5 ~ 1/8 times of playpipe (3) diameter, and described spout (4) exit velocity is 2 ~ 3.5 times of playpipe (3) entrance flow velocity.
6. a flue gas denitrification system, it is characterized in that, there is the ozone flue gas mixing arrangement as described in claim 1-5, also comprise ozone generator (11), the outlet delivery main (14) of described ozone generator (11), delivery main (14) connects playpipe (3) entrance by conveying arm (15), described delivery main (14) is equipped with flow control valve (12).
7. flue gas denitrification system according to claim 6, is characterized in that, described conveying arm (15) is equipped with a point adjustable valve (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520031930.3U CN204672113U (en) | 2015-01-16 | 2015-01-16 | Ozone flue gas mixing arrangement and flue gas denitrification system |
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| CN201520031930.3U CN204672113U (en) | 2015-01-16 | 2015-01-16 | Ozone flue gas mixing arrangement and flue gas denitrification system |
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| CN204672113U true CN204672113U (en) | 2015-09-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944531A (en) * | 2016-06-29 | 2016-09-21 | 南京龙源环保有限公司 | Denitrating and dust removing device |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944531A (en) * | 2016-06-29 | 2016-09-21 | 南京龙源环保有限公司 | Denitrating and dust removing device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180116 |