CN204220334U - A kind of denitrating flue gas directly sprays spraying urea liquid emitter - Google Patents
A kind of denitrating flue gas directly sprays spraying urea liquid emitter Download PDFInfo
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- CN204220334U CN204220334U CN201420591600.5U CN201420591600U CN204220334U CN 204220334 U CN204220334 U CN 204220334U CN 201420591600 U CN201420591600 U CN 201420591600U CN 204220334 U CN204220334 U CN 204220334U
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- urea liquid
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- flue gas
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Abstract
The utility model discloses a kind of denitrating flue gas and directly spray spraying urea liquid emitter, comprise the urea liquid transfer pipeline being provided with urea liquid entrance, the compressed air conveying pipeline being provided with atomization compressed air inlet and be provided with the cooling line of refrigerating gas import, described compressed air conveying pipeline is set in the periphery of described urea liquid transfer pipeline, and described cooling line is set in the periphery of described compressed air conveying pipeline; Described urea liquid transfer pipeline is arranged at intervals with some separator tubes, described compressed air conveying pipeline is arranged at intervals with some expansion joints, when one side works under the high temperature conditions in order to compensate injector, because expanding with heat and contract with cold the former and axis that produces and radial displacement produce change in size, protection shower nozzle under about 600 DEG C conditions by heating power destruction; Meanwhile, compensate the difference in size of internal duct and exterior line, guarantee that emitter construction is stablized, ensure jeting effect; Alleviate injector vibrations, play cushioning effect, extend injector service life.
Description
Technical field
The utility model relates to a kind of denitrating flue gas spraying urea liquid emitter, belongs to gas denitrifying technology field.
Background technology
Can to a large amount of pollutant of environmental emission while power conversion is carried out in industrial fuel burning, the most importantly coal-fired pollution caused in these pollutants, sulfur dioxide in coal-fired flue-gas, nitrogen dioxide are the primary pollution source affecting China's ambient air quality, " the 12 " planning outline passed through at the beginning of 2011, first nitrogen oxide (NOx) is listed in the binding indicator system, require minimizing 10%, thus make nitrogen oxide (NOx) become the emphasis of China's next stage pollution emission reduction.
At present, in denitration of boiler smoke technique, normal employing be selective catalytic reduction (SCR) and SNCR method (SNCR) two kinds of methods, its principle is all the nitrogen oxide (NOx) in flue gas and the reducing agent sprayed in boiler are reacted, and generates nitrogen (N
2) and water (H
2o) to reduce the discharge of nitrogen oxide (NOx).Wherein the normal reducing agent adopted is urea liquid, and device urea liquid being sprayed into boiler internal employing is injector, because injector is in high-temperature flue gas, in order to avoid urea liquid evaporates gasification in injector, usually needs to cool injector.
As Chinese patent literature CN103212285A discloses a kind of Denitration urea injector, it comprises jet element and the urea liquid inlet pipeline that is connected with jet element and compressed air inlet pipeline, described jet element, urea liquid inlet pipeline and compressed air inlet pipeline external seal have sheath body, described sheath body offers cooling water inlet and coolant outlet, cooling water from cooling water inlet enter in sheath body, injector is cooled after discharge from coolant outlet.Said apparatus adopts water-cooled mode to cool the material in injector, effectively prevent the gasification phenomenon of urea liquid in injector, but the density of water is larger, by the cooling water of circulation rapidly in exterior sleeves, increase the weight of the load of injector, with under the acting in conjunction of external high temperature, injector is easily made to deform, in addition, the sheath body of this injector directly contacts with outside high-temperature flue gas, be out of shape larger under the conduct of external high temperature, and its inside is relatively little through its distortion of pipeline of cooling, the difference of inside and outside pipeline distortion easily causes jet element to be connected insecure, occur to loosen distortion, thus affect the jeting effect of injector.
Utility model content
For solving in prior art, when adopting water-cooled mode to cool the urea liquid in injector, easily make the problem that injector deforms, and cause jet element to be connected insecure because inner and outer pipes route makes its deformation there is larger difference in temperature contrast, there is the problem loosening distortion, and then provide a kind of denitrating flue gas spraying urea liquid emitter.
For this reason, the technical scheme that the utility model is taked is,
A kind of denitrating flue gas directly sprays spraying urea liquid emitter, comprise the urea liquid transfer pipeline being provided with urea liquid entrance, the compressed air conveying pipeline being provided with atomization compressed air inlet and be provided with the cooling line of refrigerating gas import, described compressed air conveying pipeline is set in the periphery of described urea liquid transfer pipeline, and described cooling line is set in the periphery of described compressed air conveying pipeline; Described urea liquid transfer pipeline is arranged at intervals with some separator tubes; The corresponding described separator tube of described compressed air conveying pipeline is provided with expansion joint, and described expansion joint is set in the periphery of described separator tube.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, is provided with temperature element in described urea liquid conveyance conduit, in order to monitor the temperature in described urea liquid conveyance conduit.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and described separator tube and urea liquid are carried to be responsible for and be alternately connected in series, to form described urea liquid transfer pipeline; Described expansion joint and compressed air delivery are responsible for and are alternately connected in series, and to form described compressed air conveying pipeline, described expansion joint comprises expansion joint adapter and bellows, and described bellows to be responsible for compressed air delivery by the adapter of described expansion joint and to be connected.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and described cooling line, described compressed air conveying pipeline and described urea liquid transfer pipeline correspondence is provided with the patchhole in order to described temperature element to be inserted described urea liquid transfer pipeline inside.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and the wall thickness of described cooling line is thinning gradually along the flow direction of refrigerating gas, or the wall thickness of described cooling line is along the flow direction step wise reduction of refrigerating gas.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and described injector is provided with some injection structures, and described injection structure correspondence to be arranged on described in adjacent two between separator tube.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, the sidewall of described urea liquid transfer pipeline is provided with some urea liquid arms, on the sidewall of described compressed air conveying pipeline, corresponding described urea liquid arm is provided with compressed air jet pipe, on the sidewall of described cooling line, corresponding described compressed air jet pipe is provided with cooling medium dissipation hole, described compressed air jet pipe is connected with injector spray tip, described urea liquid arm, compressed air jet pipe, cooling medium dissipation hole and injector spray tip form described injection structure jointly, wherein said compressed air jet pipe is sheathed on the outside of described urea liquid arm, and and leave gap between described urea liquid arm, it is inner that described injector spray tip is positioned at described cooling medium dissipation hole, and and leave gap between described cooling medium dissipation hole.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and described urea liquid arm is perpendicular to described urea liquid transfer pipeline; Described urea liquid arm, described compressed air jet pipe and described cooling medium dissipation hole are coaxially arranged.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and the front end of described injector is also provided with described injection structure, the axes normal of described injection structure and described cooling line.
Above-mentioned denitrating flue gas directly sprays spraying urea liquid emitter, and described temperature element is thermocouple, and described thermocouple is parallel to described urea liquid transfer pipeline and arranges; Described injector spray tip comprises the connecting portion be connected with described compressed air jet pipe and the vaulted nozzle be wholely set with described connecting portion, and described vaulted nozzle is provided with injector spray orifice; Described separator tube is corrugated flexible hose; Described urea liquid transfer pipeline, described compressed air conveying pipeline and described cooling line are coaxially arranged.
Compared with prior art, the utility model tool has the following advantages:
(1) denitrating flue gas that the utility model provides directly sprays spraying urea liquid emitter, and described compressed air conveying pipeline is set in the periphery of described urea liquid transfer pipeline, and described cooling line is set in the periphery of described compressed air conveying pipeline; This urea liquid transfer pipeline is more conducive to isolated high-temperature flue gas by the structure that two-layer sleeve pipe is coated and conducts heat; Described urea liquid transfer pipeline is arranged at intervals with some separator tubes, the corresponding described separator tube of described compressed air conveying pipeline is arranged at intervals with some expansion joints, when one side works under the high temperature conditions in order to compensate injector, owing to expanding with heat and contract with cold reason and change in size that the axis that produces and radial displacement produce, thus protection shower nozzle under about 600 DEG C temperature conditions by heating power destruction; Meanwhile, due to internal and external casing structure, make different pipeline heating temperature different, cause size of expanding with heat and contract with cold between each pipeline there are differences, thus compensate internal duct and the difference in size of exterior line, guarantee that injection structure is stablized, guarantee jeting effect.On the other hand, when medium flows through injector under elevated pressures condition, separator tube and expansion joint can alleviate injector vibrations, play cushioning effect, extend injector service life.
(2) denitrating flue gas that the utility model provides directly sprays spraying urea liquid emitter, the wall thickness of described cooling line is thinning gradually along the flow direction of medium, namely described injector cooling line is thinning gradually to front end wall thickness from rear end, alleviate injector front end weight, thus move after center of gravity when it can be made to be fixed in cigarette stove, reduce the deformation because injector self gravitation reason produces.
(3) denitrating flue gas that the utility model provides directly sprays spraying urea liquid emitter, arranges temperature element to detect the temperature of urea liquid transfer pipeline inside, thus according to circumstances adjusts the intake of cooling medium.
(4) denitrating flue gas that the utility model provides directly sprays in spraying urea liquid emitter, the sidewall of described cooling line is provided with some cooling medium dissipation holes, and the refrigerating gas after being heated is overflowed from cooling medium dissipation hole.Described urea liquid transfer pipeline, described compressed air conveying pipeline and described cooling line are coaxially arranged, and are conducive to cooling medium and cool uniformly the urea liquid in urea liquid transfer pipeline.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 directly sprays the schematic diagram of spraying urea liquid emitter for denitrating flue gas that the utility model provides;
Fig. 2 directly sprays the separator tube of spraying urea liquid emitter and the schematic diagram of expansion joint for the denitrating flue gas that the utility model provides;
Fig. 3 is the front view of the novel a kind of injector spray tip of this enforcement;
Fig. 4 is the side view of injector spray tip shown in Fig. 2.
Wherein, Reference numeral is expressed as,
1-urea liquid transfer pipeline, 2-urea liquid entrance, 3-compressed air conveying pipeline, 4-is atomized compressed air inlet, 5-cooling line, the import of 6-refrigerating gas, 7-injector spray tip, 71-connecting portion, the vaulted nozzle of 72-, 73-injector spray orifice, 8-patchhole, 9-urea liquid arm, 10-compressed air jet pipe, 11-cooling medium dissipation hole, 12-expansion joint is taken over, 13-bellows, 14-compressed air delivery is responsible for, 15-separator tube, 16-urea liquid conveying supervisor.
Detailed description of the invention
Be illustrated in figure 1 a kind of denitrating flue gas of the utility model and directly spray spraying urea liquid emitter, comprise the urea liquid transfer pipeline 1 being provided with urea liquid entrance 2, the compressed air conveying pipeline 3 being provided with atomization compressed air inlet 4 and be provided with the cooling line 5 of refrigerating gas import 6, wherein, described compressed air conveying pipeline 3 is set in the periphery of described urea liquid transfer pipeline 1, and described cooling line 5 is set in the periphery of described compressed air conveying pipeline 3; Described urea liquid transfer pipeline 1 is arranged at intervals with some separator tubes 15; The corresponding described separator tube 15 of described compressed air conveying pipeline 3 is provided with expansion joint, and described expansion joint is set in the periphery of described separator tube.Separator tube described in present embodiment is provided with 3, correspondingly, described expansion joint is also provided with three, and described separator tube is corrugated flexible hose, cools even described urea liquid transfer pipeline, described compressed air conveying pipeline and described cooling line coaxially arrange for making urea liquid.
On the basis of above-mentioned embodiment, in described urea liquid conveyance conduit 1, be provided with temperature element, in order to monitor the temperature in described urea liquid transfer pipeline 1.
On the basis of above-mentioned embodiment, described separator tube 15 carries supervisor 16 to be alternately connected in series, to form described urea liquid transfer pipeline 1 with urea liquid;
Described expansion joint and compressed air delivery are responsible for 14 and are alternately connected in series, to form described compressed air conveying pipeline 3, described expansion joint comprises expansion joint adapter 12 and bellows 13, and described bellows 13 is responsible for 14 by described expansion joint adapter 12 and compressed air delivery and is connected.
On the basis of above-mentioned embodiment, described cooling line 5, described compressed air conveying pipeline 4 and described urea liquid transfer pipeline 1 correspondence are provided with the patchhole 8 in order to described temperature element to be inserted described urea liquid transfer pipeline inside.In the present embodiment, described temperature element is thermocouple, and described thermocouple is inserted urea liquid transfer pipeline 1 inside by described patchhole 8 and is parallel to described urea liquid transfer pipeline 1 and arranges.
On the basis of above-mentioned embodiment, the wall thickness of described cooling line 5 is thinning gradually along the flow direction of refrigerating gas, and in the present embodiment, its cooling line wall thickness is thinning with the Size ladder of 9.5mm, 6.5mm and 3.5mm, and described 9.5mm wall thickness length is 4.9m; 6.5mm wall thickness length is 2.5m; 3.5 wall thickness length are 3m.
On the basis of above-mentioned embodiment, described injector is provided with some injection structures, described injection structure correspondence is arranged on described in adjacent two between separator tube, and corresponding described injection structure also correspondence to be arranged on described in adjacent two between expansion joint.As illustrated in fig. 1 and 2, in the present embodiment, the sidewall of described urea liquid transfer pipeline is provided with some urea liquid arms 9, on the sidewall of described compressed air conveying pipeline, corresponding described urea liquid arm is provided with compressed air jet pipe 10, on the sidewall of described cooling line, corresponding described compressed air jet pipe is provided with cooling medium dissipation hole 11, described compressed air jet pipe is connected with injector spray tip 7, described urea liquid arm 8, compressed air jet pipe 9, cooling medium dissipation hole 10 and injector spray tip 7 form described injection structure jointly, wherein said compressed air jet pipe 10 is sheathed on the outside of described urea liquid arm 9, and and leave gap between described urea liquid arm, it is inner that described injector spray tip 7 is positioned at described cooling medium dissipation hole 11, and and leave gap between described cooling medium dissipation hole.As shown in Figures 3 and 4, described injector spray tip 7 comprises the connecting portion 71 be connected with described compressed air jet pipe and the vaulted nozzle 72 be wholely set with described connecting portion, and described vaulted nozzle is provided with injector spray orifice 73.
Mass concentration is that the urea liquid of 40-60wt% enters urea liquid transfer pipeline 1 by urea liquid entrance 2, compressed air enters compressed air conveying pipeline 3 by atomization compressed air inlet 4, urea liquid sprays formation from injector spray tip 7 and is less than 400 micro droplets under the compressed-air actuated pressure of atomization, cooling air enters cooling line 5 by refrigerating gas import 6, thus enter the outermost cavity of injector, reduce the temperature of surrounding air, thus reduce injector outside wall temperature and ensure that urea liquid is not vaporized, and finally discharged by cooling medium escape hole.
On the basis of above-mentioned embodiment, described urea liquid arm 9 is perpendicular to described urea liquid transfer pipeline 1; Described urea liquid arm 9, described compressed air jet pipe 10 are coaxially arranged with described cooling medium dissipation hole 11.
On the basis of above-mentioned embodiment, as shown in Figure 1, the front end of described injector is also provided with described injection structure, the axes normal of described injection structure and described cooling line.
Injector of the present utility model can add demineralized water from urea liquid entrance 2 after finishing using, to having urine in injector to there being the place of urea liquid process to rinse in injector, prevent urea liquid from residuing in injector intercrystalline, cause injector to block, the flushing water after flushing is discharged by injector spray tip 7.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. denitrating flue gas directly sprays a spraying urea liquid emitter, comprises the urea liquid transfer pipeline being provided with urea liquid entrance, the compressed air conveying pipeline being provided with atomization compressed air inlet and is provided with the cooling line of refrigerating gas import, it is characterized in that,
Described compressed air conveying pipeline is set in the periphery of described urea liquid transfer pipeline, and described cooling line is set in the periphery of described compressed air conveying pipeline;
Described urea liquid transfer pipeline is arranged at intervals with some separator tubes;
The corresponding described separator tube of described compressed air conveying pipeline is provided with expansion joint, and described expansion joint is set in the periphery of described separator tube.
2. denitrating flue gas according to claim 1 directly sprays spraying urea liquid emitter, it is characterized in that, is provided with temperature element in described urea liquid conveyance conduit, in order to monitor the temperature in described urea liquid conveyance conduit.
3. denitrating flue gas according to claim 1 and 2 directly sprays spraying urea liquid emitter, it is characterized in that,
Described separator tube and urea liquid are carried to be responsible for and are alternately connected in series, to form described urea liquid transfer pipeline;
Described expansion joint and compressed air delivery are responsible for and are alternately connected in series, and to form described compressed air conveying pipeline, described expansion joint comprises expansion joint adapter and bellows, and described bellows to be responsible for compressed air delivery by the adapter of described expansion joint and to be connected.
4. denitrating flue gas according to claim 3 directly sprays spraying urea liquid emitter, it is characterized in that, described cooling line, described compressed air conveying pipeline and described urea liquid transfer pipeline correspondence is provided with the patchhole in order to described temperature element to be inserted described urea liquid transfer pipeline inside.
5. denitrating flue gas according to claim 4 directly sprays spraying urea liquid emitter, it is characterized in that, the wall thickness of described cooling line is thinning gradually along the flow direction of refrigerating gas, or the wall thickness of described cooling line is along the flow direction step wise reduction of refrigerating gas.
6. the denitrating flue gas according to claim 4 or 5 directly sprays spraying urea liquid emitter, it is characterized in that,
Described injector is provided with some injection structures, and described injection structure correspondence to be arranged on described in adjacent two between separator tube.
7. denitrating flue gas according to claim 6 directly sprays spraying urea liquid emitter, it is characterized in that,
The sidewall of described urea liquid transfer pipeline is provided with some urea liquid arms, on the sidewall of described compressed air conveying pipeline, corresponding described urea liquid arm is provided with compressed air jet pipe, on the sidewall of described cooling line, corresponding described compressed air jet pipe is provided with cooling medium dissipation hole, described compressed air jet pipe is connected with injector spray tip, described urea liquid arm, compressed air jet pipe, cooling medium dissipation hole and injector spray tip form described injection structure jointly, wherein said compressed air jet pipe is sheathed on the outside of described urea liquid arm, and and leave gap between described urea liquid arm, it is inner that described injector spray tip is positioned at described cooling medium dissipation hole, and and leave gap between described cooling medium dissipation hole.
8. denitrating flue gas according to claim 7 directly sprays spraying urea liquid emitter, it is characterized in that,
Described urea liquid arm is perpendicular to described urea liquid transfer pipeline;
Described urea liquid arm, described compressed air jet pipe and described cooling medium dissipation hole are coaxially arranged.
9. the denitrating flue gas according to claim 7 or 8 directly sprays spraying urea liquid emitter, it is characterized in that, the front end of described injector is also provided with described injection structure, the axes normal of described injection structure and described cooling line.
10. denitrating flue gas according to claim 9 directly sprays spraying urea liquid emitter, it is characterized in that,
Described temperature element is thermocouple, and described thermocouple is parallel to described urea liquid transfer pipeline and arranges;
Described injector spray tip comprises the connecting portion be connected with described compressed air jet pipe and the vaulted nozzle be wholely set with described connecting portion, and described vaulted nozzle is provided with injector spray orifice;
Described separator tube is corrugated flexible hose; Described urea liquid transfer pipeline, described compressed air conveying pipeline and described cooling line are coaxially arranged.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106345297A (en) * | 2016-09-30 | 2017-01-25 | 上海守望者喷雾智能系统有限公司 | Novel denitration nozzle base, multinozzle denitration spray gun barrel and denitration spray gun |
| CN106823760A (en) * | 2017-03-21 | 2017-06-13 | 中国华能集团公司 | A kind of multitube path length spray gun for thermal power plant's SNCR denitration system |
| CN107047238A (en) * | 2017-05-02 | 2017-08-18 | 池州市神洲生态农业有限公司 | A kind of Afyon chrysanthemum spraying water replanishing device |
| CN110860200A (en) * | 2018-08-28 | 2020-03-06 | 艾克赛尔能源科技江苏有限公司 | High-efficient cooling sprayer |
| CN114746185A (en) * | 2019-11-19 | 2022-07-12 | 日立造船株式会社 | Nozzle and hydrolysis device |
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- 2014-10-13 CN CN201420591600.5U patent/CN204220334U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106345297A (en) * | 2016-09-30 | 2017-01-25 | 上海守望者喷雾智能系统有限公司 | Novel denitration nozzle base, multinozzle denitration spray gun barrel and denitration spray gun |
| CN106345297B (en) * | 2016-09-30 | 2022-11-18 | 上海守望者喷雾智能系统有限公司 | Novel denitration nozzle base, multi-nozzle denitration spray gun rod and denitration spray gun |
| CN106823760A (en) * | 2017-03-21 | 2017-06-13 | 中国华能集团公司 | A kind of multitube path length spray gun for thermal power plant's SNCR denitration system |
| CN107047238A (en) * | 2017-05-02 | 2017-08-18 | 池州市神洲生态农业有限公司 | A kind of Afyon chrysanthemum spraying water replanishing device |
| CN110860200A (en) * | 2018-08-28 | 2020-03-06 | 艾克赛尔能源科技江苏有限公司 | High-efficient cooling sprayer |
| CN114746185A (en) * | 2019-11-19 | 2022-07-12 | 日立造船株式会社 | Nozzle and hydrolysis device |
| CN114746185B (en) * | 2019-11-19 | 2023-06-16 | 日立造船株式会社 | Nozzle and hydrolysis device |
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