CN204017659U - The ammonia water spraying device of cement decomposing furnace SNCR method denitrating system - Google Patents
The ammonia water spraying device of cement decomposing furnace SNCR method denitrating system Download PDFInfo
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- CN204017659U CN204017659U CN201420306023.0U CN201420306023U CN204017659U CN 204017659 U CN204017659 U CN 204017659U CN 201420306023 U CN201420306023 U CN 201420306023U CN 204017659 U CN204017659 U CN 204017659U
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Abstract
The ammonia water spraying device of cement decomposing furnace SNCR method denitrating system.This ammonia water spraying device is included in cement decomposing furnace in the denitration temperature province of 850 ~ 1050 ℃, along temperature, be at least provided with from high to low two-layer ammoniacal liquor spray unit, in each ammoniacal liquor spray unit, be respectively equipped with the ammonia spray nozzle that at least one is connected with ammoniacal liquor supply structure, and the pass of ammonia spray nozzle that is arranged in the ammoniacal liquor spray unit at different temperatures aspect position is: the droplet that the ammonia spray nozzle that is arranged in temperature higher level face position ammoniacal liquor spray unit is ejection or size droplet diameter are greater than and are arranged in the ammonia spray nozzle that temperature lower levels position ammoniacal liquor spray unit sprays droplet or size droplet diameter.By the ammonia spray nozzle in different temperatures region, spray ammoniacal liquor droplet or the drop of corresponding different-grain diameter, it can fully be mixed with the flue gas by relevant temperature region in decomposition, and evaporate by realizing in the time of staying of this temperature province completely in operation, greatly improve the denitration rate that fully completes denitration reaction in dore furnace, reduced and avoided the phenomenon of the escaping of ammonia.
Description
Technical field
The utility model relates to a kind of ammonia water spraying device of cement decomposing furnace SNCR method denitrating system.
Background technology
At present, industrial production is to nitrogen oxide (NO
x) discharge, manufacture of cement has been the third-largest NO occupying after thermal power generation, vehicle exhaust
xdischarge industry, has a strong impact on environment, therefore extremely urgent to the denitration in cement production process.SNCR (SNCR) is the gas denitrifying technology that does not need catalyst action, and the denitration reaction temperature province (being generally 850 ℃ ~ 1050 ℃) that reducing agent is sprayed into upper/lower positions in cement decomposing furnace realizes NO
xbe reduced to N
2.Conventional denitrification reducing agent is ammoniacal liquor.In dore furnace bottom, establish fuel jetting device, make the endothermic process of the exothermic process of fuel combustion and the carbonate decomposition of raw material, in dore furnace to carry out rapidly under suspended state or fluidisation state.Dore furnace middle and lower part megadyne temperature degree is the reaction temperature region of 850 ℃ ~ 1050 ℃, is the position that spray ammonia unit is set of commonly using.
Spray ammonia droplet or drop and gas-liquid mixed are one of core technologies of SNCR denitrating technique, if ammoniacal liquor cannot fully mix with flue gas, just cannot reach higher denitration efficiency, also can cause higher the escaping of ammonia rate simultaneously, cause secondary pollution.Therefore,, when must guaranteeing that outlet flue gas NOx concentration is up to standard, also the concentration of escape ammonia to be controlled to reduced levels.
The impact that the particle diameter that sprays into ammoniacal liquor droplet in dore furnace or drop mixes ammoniacal liquor and flue gas is more complicated.The droplet that particle diameter is little or drop, due to poor rigidity, penetration capacity is little, and penetration range is short, is difficult to arrive the radial center position of dore furnace, and droplet or drop can not be transported to ammoniacal liquor the radial center region of dore furnace, and mixed effect is poor, causes denitration rate lower.Though improve the particle diameter of droplet or drop, can increase penetration range, can arrive the radial center of dore furnace, effectively increase mixing uniformity, but when droplet or size droplet diameter are larger, it is longer that droplet or drop evaporate the required time, in this thermotonus interval, may not yet be evaporated, and the time of staying of ammoniacal liquor in reaction temperature interval is relatively too short, particularly in the lower conversion zone of temperature, more can not evaporate and participate in reaction completely, cause occurring the escaping of ammonia phenomenon.For example existing three layers of adopting spray in ammonia regions at present, most of ammoniacal liquor droplet in lower floor's high temperature spray ammonia region or drop can evaporate completely and react with NOx in whole reaction interval, but in, ammoniacal liquor droplet or the drop of the same particle size of spraying in the spray ammonia region that reduces gradually of upper strata temperature, most of droplet or drop are to complete evaporation process outside reaction temperature region, thereby occur the escaping of ammonia situation.In reaction temperature region, be conventionally adopted as at present individual layer ammoniacal liquor spray pattern, the quantity of ammonia spray nozzle is also limited, and the distribution after ammoniacal liquor ejection is also limited to, and is therefore difficult to realize NH
3with the abundant mixing of NOx, even if the dore furnace of minority has the form in layering spray ammonia region, but the ammoniacal liquor droplet of each layer of ejection or the particle diameter of drop, flow are all identical, and spray ammonia mouth is also identical, therefore cannot fundamentally realize and make NH
3with the abundant mixing of NOx to improve denitration rate and to avoid the problem of the escaping of ammonia.
Utility model content
For above-mentioned situation, the utility model provides a kind of ammonia water spraying device of cement decomposing furnace SNCR method denitrating system, ammoniacal liquor droplet or the drop that makes to spray can be realized more fully in the reaction temperature region of dore furnace, evaporation completely and with the mixing of flue gas, reaction, improve denitration efficiency, reduce or avoid the generation of the escaping of ammonia.
The ammonia water spraying device of the utility model cement decomposing furnace SNCR method denitrating system, be included in cement decomposing furnace in the denitration temperature province of 850 ~ 1050 ℃, along temperature, be at least provided with from high to low two-layer ammoniacal liquor spray unit, in each ammoniacal liquor spray unit, be respectively equipped with the ammonia spray nozzle that at least one is connected with ammoniacal liquor supply structure, and the pass of ammonia spray nozzle that is arranged in the ammoniacal liquor spray unit at different temperatures aspect position is: the droplet that the ammonia spray nozzle that is arranged in temperature higher level face position ammoniacal liquor spray unit is ejection or size droplet diameter are greater than and are arranged in the ammonia spray nozzle that temperature lower levels position ammoniacal liquor spray unit sprays droplet or size droplet diameter.Wherein, the described ammonia spray nozzle that can spray relatively large droplet or size droplet diameter, except having the nozzle of different corresponding sprinkling bores by employing the most simply and easily, also can adopt and/or coordinate modes such as controlling corresponding spray pressure, flow velocity to realize simultaneously.
In above-mentioned ammonia water spraying device, a kind of preferred mode is that can be in described denitration temperature province 1050 ~ 950 ℃, 1000 ~ 900 ℃ and three temperature aspect positions of 950 ~ 850 ℃ be respectively arranged with high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space.Further, be more preferably described high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space flow direction along flue gas in cement decomposing furnace are equidistantly arranged.
In the SNCR denitrating system of current all kinds of conventionally form cement decomposing furnaces, pass through NH
3all carry out conventionally in 850 ~ 1050 ℃ of temperature ranges the decomposition region of reacting with NO and realizing denitration.Due to NH
3with reacting of NO, be first to spray after the ammoniacal liquor evaporation gasification entering in system, could mix with flue gas and carry out and complete the reaction of NOx reduction.Therefore this process need has the sufficient time.For example have bibliographical information, when SNCR denitration is implemented in the cement plant of European and American areas, this process at least will keep the time of staying of 0.5s.The time of staying is too short, NH
3incomplete with reacting of NOx, cause the removal efficiency decline of NOx and/or the increase of the escaping of ammonia.Practice discovery, on the one hand, along with NH
3the increase of the time of staying, the conversion ratio of NOx can tend towards stability, if but overstand, excessive NH
3again can with O
2react and generate NO, can cause on the contrary NO clearance to decline.Therefore, in control, send in system the NH for denitration
3amount simultaneously, guarantees the NH that amount is sent on demand
3can be fully, react with NOx completely, be the key that the removal efficiency of raising NOx is avoided the escaping of ammonia simultaneously.
The utility model adopts at temperature different temperatures aspect position from high to low two-layer or more multi-layered ammoniacal liquor spray unit is set in this denitration temperature province, and make to be arranged in the ammoniacal liquor that the nozzles spray of the ammoniacal liquor spray unit at high-temperature aspect position relatively goes out to have larger droplet or size droplet diameter, and the particle diameter of the ammoniacal liquor droplet that the nozzles spray that is arranged in the ammoniacal liquor spray unit at relatively lower temp aspect position goes out or drop is relatively little, and for greater particle size ammoniacal liquor droplet or drop, on the one hand its to enter in stove be in the relatively high region of temperature, its operation with inner flue gas of the stove in stove also has longer path and the time of staying relatively on the other hand, these conditions be all conducive to its fully/NOx higher with the interior concentration of stove mixes and reacts after evaporation gasification completely, on the contrary, when flue gas runs to the lower region of temperature, not only temperature reduces, the concentration of NOx also reduces relatively, the time of staying of flue gas also all shortens relatively, now spray have corresponding to ammoniacal liquor droplet or the drop of small particle diameter, make can the realize equally fully/evaporation gasification completely of ammoniacal liquor droplet in this region or drop and with the mixing of flue gas, reaction, obvious more reasonable with agreeing with mutually with the rule of SNCR denitrification process.
Test shows, except special circumstances, in the above-mentioned ammonia water spraying device of the utility model, in described each ammoniacal liquor spray unit, be set to spray droplet or the ammonia spray nozzle of size droplet diameter within the scope of 50 ~ 300 μ m, conventionally can meet denitration needs, and and obtain satisfied effect.
On this basis, while adopting the above-mentioned mode that is set to high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space, a kind of optimal way that adopts to the ammonia spray nozzle in each ammoniacal liquor spray unit in different temperatures aspect position is: what in the ammoniacal liquor spray unit of high-temperature region, arrange is that droplet or the size droplet diameter spraying is the ammonia spray nozzle of 100 ~ 300 μ m, and the droplet or the size droplet diameter that are more preferably ejection are the ammonia spray nozzle of 200 ~ 300 μ m; And/or in middle warm area ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 50 ~ 250 μ m, the droplet or the size droplet diameter that are more preferably ejection are the ammonia spray nozzle of 100 ~ 200 μ m; And/or in low-temperature space ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 50 ~ 200 μ m, the droplet or the size droplet diameter that are more preferably ejection are the ammonia spray nozzle of 50 ~ 100 μ m.
In order to be more conducive to that the ammoniacal liquor spraying is mixed with the even of flue gas of operation fast, make denitration reaction more stable and effective, ammonia spray nozzle in described ammoniacal liquor spray unit, is preferably in its residing temperature aspect position with at least two around the equidistant distribution of mode.According to the diameter of cement decomposing furnace, better mode is with 3 ~ 8 of equidistantly arranging around mode in its residing temperature aspect position.
Test shows, can also be separately or be combined can being conducive to equally of adopting with aforesaid way and make the ammoniacal liquor that sprays and the mixed uniformly another kind of mode of the flue gas of operation fast be, in described ammoniacal liquor spray unit, have at least ammonia spray nozzle to adopt to make ammoniacal liquor emission direction for cement decomposing furnace in the flow of flue gas direction mode with 30o ~ 90o angle arrange.
Deep research discovery, the spray effect of the nozzle of different structure form has different separately features.For example, under same hydrojet pressure, the atomizing particle size that the ammonia spray nozzle of fan-shaped hydrojet structure sprays is large, and the atomizing particle size that the ammonia spray nozzle of the ammonia spray nozzle of eddy flow hydrojet structure and/or spiral hydrojet structure sprays is relatively little.On the other hand, under same hydrojet pressure, the droplet that ammonia spray nozzle sprays of fan-shaped hydrojet structure or drop focus mostly in fan-shaped central area, and droplet or drop that the ammonia spray nozzle of the ammonia spray nozzle of eddy flow hydrojet structure and/or spiral hydrojet structure sprays, due to the wall phenomenon that becomes that its turning effort produces, the droplet of central area or drop are less.Therefore, to in different temperatures deck sections bit position, arrange for spraying the ammonia spray nozzle of different droplets or size droplet diameter, except above-mentioned including but not limited to has the ammonia spray nozzle of larger droplet or drop spray diameter, can also be separately or by combination, adopt the ammonia spray nozzle of different hydrojet versions, and/or further by adjusting the modes such as hydrojet pressure or flow velocity, realize the particle size of sprayed ammoniacal liquor droplet or drop is carried out to regulation and control.
Above-mentioned fan-shaped hydrojet structure nozzle, its spray shapes is plane sector, and it normally forms by an oval jet hole (general fan nozzle) or a round nozzle mouth tangent with guide face (deflection fan nozzle).When high speed water jet impact outlet guide stream interface, because inertia extruding forms fan shape liquid film, because it has larger relative velocity to air, be broken into little droplet or drop and then realize atomization with the violent fricting shearing of air.The spray angle of universal standard fan nozzle shower nozzle is 0 ~ 110 °.Spray shapes is the fan-shaped of multiple angles, and the impact due to terrestrial gravitation has the generation of " edge effect ", and it is tiny evenly that the fan-shaped section of spraying produces tapered edge spraying granule.When a plurality of fan-shaped hydrojet structure nozzles are arranged, need to have 25 ~ 30% overlapping so that arranging evenly in whole direction.Fan-shaped hydrojet structure jet expansion shape can have rectangle that length-width ratio is very large, olive shape etc., makes to export jet and is rectified into fan-shaped.Compare with the nozzle of other form, fan-shaped hydrojet structure nozzle forms flat fan shape at nozzle exit, can obtain larger atomizing angle, and the area that nozzle is covered is larger, is more conducive to the mixing between fluid, and the broad smoothness of passage is difficult for blocking.
Eddy flow hydrojet structure nozzle also claims rotarytype injector, it is to utilize nozzle inward eddy part to produce liquid in rotation, in convergent passage, accelerate the hollow diffusion taper liquid film of ejection, its principle is that liquid at high speed enters behind central rotation chamber, and liquid can produce high-speed motion in rotating room.According to spinning momentum square law of conservation, the radius of rotary speed and rotating room is inversely proportional to, and therefore large the closer to place, axle center rotary speed, static pressure is also little.When rotary speed reaches certain numerical value, when the pressure of swirl nozzle center equals atmospheric pressure, the liquid of ejection form the tapered annular liquid film rotating around air-core.Along with the prolongation of liquid film, the formed ripple development of the violent disturbance of air, liquid film splits into fine rule.Add the impact of turbulent flow radial velocity component and surrounding air relative velocity, finally cause liquid-sheet disintegration to become silk, after brin fracture, be subject to capillary effect, finally form the mist group who is formed by countless droplets or drop.Common eddy flow part has various structures form, as tangential slot, tangential hole, eddy flow groove, swirl plate etc.Due to centrifugal action, droplet or the drop of the ejection of eddy flow hydrojet structure nozzle have the wall of becoming phenomenon, cause droplet or drop centered region droplet or drop relatively less, and neighboring area are relatively many.
The helical form spout that spiral hydrojet structure nozzle is diminished gradually by middle cavity and surrounding forms.The starting point of its inner chamber and helical form spout is tangent, and nozzle chamber is streamlined from entrance to outlet, the resistance of minimizing fluid that can be fabulous.Liquid sprays by aperture under pressure, realizes pressure potential to the conversion of kinetic energy, obtains the flowing velocity that relative gas is higher.Fluid column impinges upon on helicoid at an angle, thus the concentric circles conical surface film that its outer liquid is split into diminish gradually from level to level, and spray from the space of spiral nozzle.Film and air produce the shear action between gas-liquid, and fragmentation becomes little water droplet, realizes atomization.All taper seat atomizations form the spray field of a complete solid-cone shape.Spiral hydrojet structure nozzle is a kind of solid cone shaped or conical hollow spray nozzle, and spray angle scope can be 60 ~ 170 o.
The spray nozzle that comprises the different structure forms such as fan-shaped hydrojet structure nozzle, eddy flow hydrojet structure nozzle and spiral hydrojet structure nozzle is all at present the available employing of commercial prod of existing many reports and/or use.
For example, a kind ofly can structure for reference form be set and be, in 850 ~ 1050 ℃ of temperature provinces described in cement decomposing furnace, the ammonia spray nozzle being arranged in the ammoniacal liquor spray unit at maximum temperature aspect position is the ammonia spray nozzle of fan-shaped hydrojet structure, and the ammonia spray nozzle in the ammoniacal liquor spray unit at all the other temperature aspect positions is respectively the ammonia spray nozzle of eddy flow hydrojet structure or the ammonia spray nozzle of spiral hydrojet structure.Particularly when adopting the above-mentioned mode that is set to high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space, except the ammonia spray nozzle being arranged in the ammoniacal liquor spray unit of high-temperature region is adopted as the ammonia spray nozzle of fan-shaped hydrojet structure, being preferably the ammonia spray nozzle being arranged in middle warm area ammoniacal liquor spray unit is the ammonia spray nozzle of eddy flow hydrojet structure, and the ammonia spray nozzle being arranged in low-temperature space ammoniacal liquor spray unit is the ammonia spray nozzle of spiral hydrojet structure.Adopt this structure that form is set, or further as required by the cooperation of hydrojet pressure or flow velocity is adjusted, can realize well taking into account and in high-temperature aspect spray ammonia region, there is in greater particle size and stove central area distribute more droplet or drop, in comprising, low-temperature space has the feature that particle diameter is relatively little and stove inner rim area distribution is more of droplet or drop in all the other interior temperature aspect positions, make the distribution and the more uniform mixed effect that near wall and the central area of stove, have reasonable ammoniacal liquor droplet or drop, be conducive to guarantee that the whole ammoniacal liquor droplets or the drop that spray can fully evaporate and fully mix in reaction temperature region, reaction.
The ammonia water spraying device of the above-mentioned cement decomposing furnace SNCR of the utility model method denitrating system, by the different temperatures region in common denitration reaction temperature province, adopt ammoniacal liquor droplet or the drop of ejection different-grain diameter size, can realize fully, evaporate completely, mix and react with NOx with the flue gas in dore furnace different temperatures regional level, greatly improved the denitration rate of dore furnace and reduced the escaping of ammonia phenomenon.
Below in conjunction with the specific embodiment of drawings and Examples, foregoing of the present utility model is described in further detail again.But this should be interpreted as to the scope of the above-mentioned theme of the utility model only limits to following example.Do not departing from the above-mentioned technological thought situation of the utility model, various replacements or the change according to ordinary skill knowledge and customary means, made, all should be included in scope of the present utility model.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the utility model cement decomposing furnace SNCR method denitrating system ammonia water spraying device.
Fig. 2 is the A-A cross section structure schematic diagram of cement decomposing furnace in Fig. 1.
Fig. 3 is the B-B cross section structure schematic diagram of cement decomposing furnace in Fig. 1.
Fig. 4 is the C-C cross section structure schematic diagram of cement decomposing furnace in Fig. 1.
The specific embodiment
embodiment 1
Fig. 1 is a kind of basic structure of the ammonia water spraying device of the utility model cement decomposing furnace SNCR method denitrating system.Flue gas 8 enters into the denitration reaction temperature province of 850～1050 ℃ from the bottom of cement decomposing furnace 1.In the temperature province of 850 ~ 1050 ℃ of this denitration reaction along temperature from high to low, in the position of 1050 ~ 950 ℃ of temperature aspects, be provided with respectively high-temperature region ammoniacal liquor spray unit 2, in the position of 1000 ~ 900 ℃ of temperature aspects, be provided with middle warm area ammoniacal liquor spray unit 3, in the position of 950 ~ 850 ℃ of temperature aspects, be provided with low-temperature space ammoniacal liquor spray unit 4.In each ammoniacal liquor spray unit, all to be placed with equally spacedly around mode, pass through respectively the ammonia spray nozzle that ammoniacal liquor arm 6 is connected with ammoniacal liquor supply structure with ammoniacal liquor house steward 7, and in each ammoniacal liquor arm 6, be also respectively equipped with the control valve 5 that can control ammoniacal liquor spray volume.Wherein, ammonia spray nozzle in high-temperature region ammoniacal liquor spray unit 2, for take fan-shaped mode and spray particle diameter and be more preferably 200 ~ 300 μ m as 100 ~ 300 μ m(to be placed with equally spacedly around mode) the fan-shaped ammonia spray nozzle of the form such as the general fan nozzle of droplet or drop or deflection fan nozzle, (shown in figure is 3 fan-shaped ammonia spray nozzles) as shown in Figure 4; Ammonia spray nozzle in middle warm area ammoniacal liquor spray unit 3, for take eddy flow form and spray particle diameter and be more preferably as 100 ~ 200 μ m as 50 ~ 250 μ m(to be placed with equally spacedly around mode) the cyclone structure ammonia spray nozzle of the patterns such as hollow cone of ammoniacal liquor droplet or drop, (shown in figure is 4 cyclone structure ammonia spray nozzles) as shown in Figure 3; Ammonia spray nozzle in low-temperature space ammoniacal liquor spray unit 4, for take spiral form and spray particle diameter and be more preferably as 50 ~ 100 μ m as 50 ~ 200 μ m(to be placed with equally spacedly around mode) ammoniacal liquor droplet or the solid cone shaped of drop or the ammonia spraying nozzle of conical hollow helical structure, as shown in Figure 2 (shown in figure is 6 helical structure ammonia spray nozzles).On this basis, the droplet of ammonia spray nozzle in each temperature province ammoniacal liquor spray unit ejection or the particle size of drop, can also be according to actual conditions, and the modes such as ejection flow velocity/flow by 5 pairs of ammoniacal liquor of control valve further regulate and control.In addition, as required, the ammoniacal liquor emission direction of the ammonia spray nozzle in each temperature province ammoniacal liquor spray unit, can also within the scope of 30 ~ 90 o, regulate the angle between flue gas 8 flow directions in itself and cement decomposing furnace 1, with regulate ammoniacal liquor be sprayed into distributing position after stove, with mixed effect and/or time of staying in relevant temperature region of flue gas, to obtain better denitration efficiency and minimizing/avoid the occurring resultant effect of the escaping of ammonia.
By this kind of structure and mode, or further as required in conjunction with the cooperation adjustment to hydrojet pressure or flow velocity, can realize well taking into account and in high-temperature aspect spray ammonia region, there is in greater particle size and stove central area distribute more droplet or drop, in comprising, low-temperature space has the feature that particle diameter is relatively little and stove inner rim area distribution is more of droplet or drop in all the other interior temperature aspect positions, make the distribution and the more uniform mixed effect that near wall and the central area of stove, have reasonable ammoniacal liquor droplet or drop, be conducive to guarantee that the whole ammoniacal liquor droplets or the drop that spray can fully evaporate and fully mix in reaction temperature region, reaction.
Claims (10)
1. the ammonia water spraying device of cement decomposing furnace SNCR method denitrating system, its feature comprises: in cement decomposing furnace in the denitration temperature province of 850 ~ 1050 ℃, along temperature, be at least provided with from high to low two-layer ammoniacal liquor spray unit, in each ammoniacal liquor spray unit, be respectively equipped with the ammonia spray nozzle that at least one is connected with ammoniacal liquor supply structure, and the pass of ammonia spray nozzle that is arranged in the ammoniacal liquor spray unit at different temperatures aspect position is: the droplet that the ammonia spray nozzle that is arranged in temperature higher level face position ammoniacal liquor spray unit is ejection or size droplet diameter are greater than and are arranged in the ammonia spray nozzle that temperature lower levels position ammoniacal liquor spray unit sprays droplet or size droplet diameter.
2. ammonia water spraying device as claimed in claim 1, is characterized by: in three temperature provinces of in described denitration temperature province 1050 ~ 950 ℃, 1000 ~ 900 ℃ and 950 ~ 850 ℃, be respectively arranged with high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space.
3. ammonia water spraying device as claimed in claim 2, is characterized by: described high-temperature region, middle warm area and three layers of ammoniacal liquor spray unit of low-temperature space flow direction along flue gas in cement decomposing furnace are equidistantly arranged.
4. the ammonia water spraying device as described in one of claims 1 to 3, is characterized by: what in described each ammoniacal liquor spray unit, arrange is that droplet or the size droplet diameter spraying is the ammonia spray nozzle of 50 ~ 300 μ m.
5. ammonia water spraying device as claimed in claim 4, it is characterized by: what in the ammoniacal liquor spray unit of high-temperature region, arrange is that droplet or the size droplet diameter spraying is the ammonia spray nozzle of 100 ~ 300 μ m, and/or in middle warm area ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 50 ~ 250 μ m, and/or in low-temperature space ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 50 ~ 200 μ m.
6. ammonia water spraying device as claimed in claim 5, it is characterized by: what in the ammoniacal liquor spray unit of high-temperature region, arrange is that the size droplet diameter spraying is the ammonia spray nozzle of 200 ~ 300 μ m, and/or in middle warm area ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 100 ~ 200 μ m, and/or in low-temperature space ammoniacal liquor spray unit, arrange be ejection droplet or size droplet diameter be the ammonia spray nozzle of 50 ~ 100 μ m.
7. the ammonia water spraying device as described in one of claims 1 to 3, is characterized by: the ammonia spray nozzle in described ammoniacal liquor spray unit is with at least two around the equidistant distribution of mode in its residing temperature aspect position.
8. ammonia water spraying device as claimed in claim 6, is characterized by: the ammonia spray nozzle in described ammoniacal liquor spray unit for in its residing temperature aspect position with 3 ~ 8 of equidistantly arranging around mode.
9. the ammonia water spraying device as described in one of claims 1 to 3, is characterized by: in described ammoniacal liquor spray unit, have at least an ammonia spray nozzle to adopt to make ammoniacal liquor emission direction for cement decomposing furnace in the flow of flue gas direction mode with 30o ~ 90o angle arrange.
10. the ammonia water spraying device as described in one of claims 1 to 3, it is characterized by: in 850 ~ 1050 ℃ of temperature provinces of cement decomposing furnace, the ammonia spray nozzle being arranged in the ammoniacal liquor spray unit at maximum temperature aspect position is the ammonia spray nozzle of fan-shaped hydrojet structure, and the ammonia spray nozzle in the ammoniacal liquor spray unit at all the other temperature aspect positions is respectively the ammonia spray nozzle of eddy flow hydrojet structure or the ammonia spray nozzle of spiral hydrojet structure; Being preferably the ammonia spray nozzle being arranged in middle warm area ammoniacal liquor spray unit is the ammonia spray nozzle of eddy flow hydrojet structure, and the ammonia spray nozzle being arranged in low-temperature space ammoniacal liquor spray unit is the ammonia spray nozzle of spiral hydrojet structure.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| CN105214468A (en) * | 2014-06-10 | 2016-01-06 | 四川大学 | The ammoniacal liquor spray method of cement decomposing furnace SNCR method denitrating system and flusher |
| CN106540543A (en) * | 2017-01-17 | 2017-03-29 | 启迪桑德环境资源股份有限公司 | A kind of multiple pass type selective catalytic reduction denitration device |
| CN108392959A (en) * | 2018-02-08 | 2018-08-14 | 上海电气电站环保工程有限公司 | A kind of spray ammonia system and its implementation for denitrating flue gas |
| CN111151106A (en) * | 2018-11-07 | 2020-05-15 | 洛阳德明石化设备有限公司 | System for improving gas-liquid separation effect of WGS (WGS) desulfurizing tower and application of system |
| CN112191089A (en) * | 2020-08-20 | 2021-01-08 | 广西鱼峰水泥股份有限公司 | Decomposing furnace for reducing ammonia water consumption in nitrogen oxide treatment process and application method thereof |
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2014
- 2014-06-10 CN CN201420306023.0U patent/CN204017659U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214468A (en) * | 2014-06-10 | 2016-01-06 | 四川大学 | The ammoniacal liquor spray method of cement decomposing furnace SNCR method denitrating system and flusher |
| CN105214468B (en) * | 2014-06-10 | 2018-05-01 | 四川大学 | The ammonium hydroxide spray method and flusher of cement decomposing furnace SNCR method denitrating systems |
| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| CN106540543A (en) * | 2017-01-17 | 2017-03-29 | 启迪桑德环境资源股份有限公司 | A kind of multiple pass type selective catalytic reduction denitration device |
| CN106540543B (en) * | 2017-01-17 | 2022-12-02 | 启迪环境科技发展股份有限公司 | Multi-pass selective catalytic reduction denitration device |
| CN108392959A (en) * | 2018-02-08 | 2018-08-14 | 上海电气电站环保工程有限公司 | A kind of spray ammonia system and its implementation for denitrating flue gas |
| CN111151106A (en) * | 2018-11-07 | 2020-05-15 | 洛阳德明石化设备有限公司 | System for improving gas-liquid separation effect of WGS (WGS) desulfurizing tower and application of system |
| CN112191089A (en) * | 2020-08-20 | 2021-01-08 | 广西鱼峰水泥股份有限公司 | Decomposing furnace for reducing ammonia water consumption in nitrogen oxide treatment process and application method thereof |
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