CN205412683U - Cement kiln SCR flue gas denitration reductant gasification / mixture integrated device - Google Patents
Cement kiln SCR flue gas denitration reductant gasification / mixture integrated device Download PDFInfo
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- CN205412683U CN205412683U CN201620152776.XU CN201620152776U CN205412683U CN 205412683 U CN205412683 U CN 205412683U CN 201620152776 U CN201620152776 U CN 201620152776U CN 205412683 U CN205412683 U CN 205412683U
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- reducing agent
- cyclone cylinder
- level cyclone
- flue gas
- cement kiln
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Abstract
The utility model discloses a cement kiln SCR flue gas denitration reductant gasification / mixture integrated device, in spouting the uptake shaft of the correspondence between the present whirlwind section of thick bamboo in cement kiln tail pre -heater upper portion through reductant injection apparatus with SCR denitration reductant, utilize uptake shaft department to come from the high temperature flue gas of 500 DEG C ~750 DEG C of left and right sides of cement kiln tail, gasify into the gas ammonia with the reductant, after mixing, the gas ammonia gets into a whirlwind section of thick bamboo with the high temperature flue gas, utilize the whirl effect of a whirlwind section of thick bamboo, strengthen the flue gas disturbance, make the intensive mixing of flue gas and reductant, it carries out the denitrogenation reaction to get into SCR denitrification facility (9) arranged downriver again behind pre -heater exhaust pass. The utility model relates to a cement kiln SCR denitration reductant gasification that investment and running cost are low, the energy consumption is low, fail safe nature is high mixes integration method and device.
Description
Technical field
This utility model relates to denitrating flue gas field, specifically a kind of cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device.
Background technology
SCR denitration reducing agent mainly has liquefied ammonia, ammonia and carbamide at present.It is that denitrating system tank volume is less that liquefied ammonia makees the advantage of reducing agent, and reducing agent consumption is minimum, and system investments and operating cost are low；Shortcoming is that liquefied ammonia belongs to hazardous chemical (dangerous materials numbering 23003), and ammonia is poisonous, flammable, can be quick-fried, requires the highest to transport and condition of storage, and needing could mass storage, use through relevant fire fighting safety service examination & approval.When using ammonia to make reducing agent, being liquid under ammonia spirit room temperature, typically need not gentle heat tracing process of going bail for, technological process is succinct, and system energy consumption is low, but needs its consideration to transport safely and store.When carbamide is as reducing agent, its security requirement is relatively low, can be transported easily, stores and use, but carbamide to be made resolves into gas ammonia, and to need to consume substantial amounts of heat, energy consumption bigger.And ammonia has taken into account liquefied ammonia and carbamide characteristic, there is especially for periphery the factory of ammonia by-product, use ammonia to have more superiority of effectiveness as denitrification reducing agent.
When the ammonia of employing about 20% is reducing agent, first have to, by spraying into again after ammonia heating and gasifying, flue carries out under catalyst action chemical reaction, remove nitrogen oxides.Several method making reducing agent gasify is had to include at present: (1) uses heater to be heated by surrounding air, and makes it mix in a container with ammonia, so that ammonia gasification；(2) using the autoclave heat exchanger tank equipped with ammonia, it, equipped with the steam pipe coil of gasification ammonia, utilizes steam pipe coil to make ammonia gasify；(3) ammonia stripping column, by ammonia spraying to fluid contact tower top, and bottom steam feeding, and uses flue gas stream, flue gas stream aerator to extract and send into vaporizer vessel out, and flue gas mixes with ammonia and makes it gasify in this embodiment.
Spray into reactor leading portion flue from ammonia injection apparatus after dilution wind dilution again after ammonia is gasified, enter SCR reactor after mixing with NOx in flue gas and carry out catalytic reduction reaction.SCR technological design it is crucial that realize the uniform mixing of nitrogen oxides in effluent and reducing agent ammonia, if catalyst inlet ammonia nitrogen ratio is inconsistent, it will the region reaction of nitrogen oxides causing reductant concentration low is not enough, reduces the denitration efficiency of catalyst；The region supply excess that reducing agent ammonia density is high, the escaping of ammonia increases.The mixing of flue gas and reducing agent ammonia completes mainly by spray ammonia mixing arrangement, and ammonia/air mixture realizes uniformly mixing under the natural turbulent flow of flue gas or the flow-disturbing effect of static mixing gas.At present, conventional mixing arrangement includes static mixer, ammonia-spraying grid AIG technology etc., and whole ammonia prepares hybrid system complex process, and equipment is more, and cost of investment is the highest.
Utility model content the purpose of this utility model is to provide a kind of investment and the cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device that operating cost is low, energy consumption is low, security reliability is high, make full use of cement kiln existing apparatus equipment, the existing SCR denitration system of economization needs arrange the pyrolysis of baroque reducing agent or evaporation equipment, reducing agent dilution mixture equipment, optimize spraying system, simplify denitrating technique, reduce cost of investment.
In order to achieve the above object, the technical scheme that this utility model is used is:
nullCement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device，The C1 level cyclone cylinder carried including cement kiln end preheater、C2 level cyclone cylinder、C3 level cyclone cylinder、C4 level cyclone cylinder、C5 level cyclone cylinder，C1 C5 level cyclone cylinder is staggered successively by order from top to bottom，Wherein the uptake flue of C4 level cyclone cylinder is communicated to C5 level cyclone cylinder，The uptake flue of C3 level cyclone cylinder is communicated to C4 level cyclone cylinder，The uptake flue of C2 level cyclone cylinder is communicated to C3 level cyclone cylinder，The uptake flue of C1 level cyclone cylinder is communicated to C2 level cyclone cylinder，C1 level cyclone cylinder connects also by pipeline device out of stock with the SCR of far-end，It is characterized in that: also include reducing agent injection apparatus，Described reducing agent injection apparatus is arranged at the uptake flue of C1 level cyclone cylinder，Or it is arranged at the uptake flue of C2 level cyclone cylinder，Or it is arranged at the uptake flue of C3 level cyclone cylinder，Reducing agent injection apparatus sprays into the ammonia of 19.5-20.5% concentration as reducing agent in the uptake flue at place.
Described cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device, it is characterized in that: described reducing agent injection apparatus is arranged in the position that uptake flue temperature is 500 ~ 600 DEG C of C1 level cyclone cylinder, or it is arranged in the position that uptake flue temperature is 600 ~ 700 DEG C of C2 level cyclone cylinder, or is arranged in the position that uptake flue temperature is 700 ~ 750 DEG C of C3 level cyclone cylinder.
Described cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device, it is characterized in that: described reducing agent injection apparatus is the twin spray gun containing atomizer, twin spray gun is automatic telescopic or fixed, and atomizing medium is the compressed air of 0.3 ~ 0.6MPa.
Described cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device, it is characterized in that: described reducing agent injection apparatus entrance is connected with reducing agent storing feedway by reducing agent liquid line respectively, connected with compressed air feedway by compressed air line, described reducing agent storing feedway is disposed with reducing agent delivery pump in the reducing agent liquid line on reducing agent injection apparatus direction, effusion meter, reducing agent delivery pump, the reducing agent regulation valve regulating reducing agent flow between effusion meter also by feedback is connected with reducing agent storing feedway；Described compressed air feedway is disposed with compressed air require meter, compressed air regulating valve in the compressed air line on reducing agent injection apparatus direction.
Described cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device, it is characterized in that: described reducing agent injection apparatus is by regulation jet compression air capacity and the amount of reducing agent, control to be ejected into the size of reductant solution atomizing particle in flue gas, its a size of 80-100 μm.
Described cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device, it is characterised in that: described SCR denitration device can be high-temperature high dust arrangement, it is also possible to be middle warming middle-JIAO dirt arrangement.
This utility model will spray in existing C1 or C2 in cement kiln end preheater top or C3 level cyclone cylinder uptake flue by injection apparatus from SCR denitration reducing agent, utilize the high-temperature flue gas from 500 DEG C ~ about 750 DEG C of cement kiln end at uptake flue, reducing agent is gasified or resolves into gas ammonia, gas ammonia enters corresponding cyclone cylinder after mixing with high-temperature flue gas, utilize the cyclonic action of cyclone cylinder, reinforcement flue gas is sufficiently mixed with reducing agent, guarantee reducing agent and flue gas arrive be sufficiently mixed before SCR denitration device after enter the most afterwards and be arranged in the SCR denitration device in downstream and carry out denitrification reaction.
This utility model advantage is:
On the uptake flue of the existing cyclone cylinder that SCR system injection apparatus is arranged at cement kiln end preheater top by this utility model, make full use of cement kiln existing apparatus equipment: the SCR denitration device in (1) spray site distance downstream, apart from far, can make flue gas and reducing agent have sufficient incorporation time；(2) in economization conventional process system, reducing agent prepares the ammonia vapo(u)rization system equipment in district and ammonia buffer system equipment, it is only necessary to arrange reducing agent storage facilities, thus whole ammonia sound zone system structure is simpler, is substantially reduced cost of investment；(3) the ammonia sky mixing apparatus in economization traditional handicraft and diluent facilities, reduce cost of investment；(4) area occupied and the space in place, the problem being very beneficial for the denitration insufficient space that cement kiln faces in later stage denitration is transformed are reduced；(5) eliminate electrical heating used or steam in conventional Ammonia Process and add thermogenetic expense, use flue gas to directly heat, reduce operating cost and energy dissipation, have more economy and the feature of environmental protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is schematic diagram of device of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail:
Such as Fig. 1, cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration method and device, including: kiln tail preheater, preheater windspout barrel and uptake flue thereof, reducing agent injection apparatus.
SCR denitration reducing agent is sprayed in the corresponding uptake flue 5 or 6 or 7 between cement kiln end preheater 1 top cyclone cylinder 2 or 3 or 4 by reducing agent injection apparatus 8, utilize the high-temperature flue gas from 500 DEG C ~ about 750 DEG C of cement kiln end at uptake flue, reducing agent is gasificated into gas ammonia, gas ammonia enters cyclone cylinder after mixing with high-temperature flue gas, utilize the cyclonic action of cyclone cylinder, strengthen flue gas disturbance, make being sufficiently mixed of flue gas and reducing agent, reduce the inhomogeneities of reducing agent, ensure that reducing agent and flue gas enter after arriving before SCR reactor fully gasification mixing after preheater exhaust pass again to be arranged in the SCR denitration device 9 in downstream and carry out denitrification reaction.Reducing agent injection apparatus 8 may be arranged at (temperature range is 500 ~ 600 DEG C of intervals) at the A on the uptake flue between C1 and the C2 level cyclone cylinder of kiln tail preheater topmost, or at the uptake flue B between C2 and C3 level cyclone cylinder (temperature range is 600 ~ 700 DEG C of intervals), when between above-mentioned C1 and C2 cyclone cylinder, temperature is unsatisfactory for, it is possible to be arranged in the uptake flue between C3 and C4 level cyclone cylinder (temperature range is 600 ~ 700 DEG C of intervals).
Reducing agent injection apparatus 8 entrance is respectively communicated with compressed air line and reducing agent liquid line, reducing agent liquid line includes reducing agent storing feedway 10, reducing agent delivery pump 10-1, electromagnetic flowmeter 10-2 and reducing agent regulation valve 10-3, and compressed air line is provided with compressed air feedway 11, compressed air require meter 11-1 and compressed air regulating valve 11-2.A whole set of denitrification apparatus can regulate jet compression air capacity and the amount of reducing agent according to the real-time NOx concentration situation of change of cement kiln, controls to be ejected into the size of reductant solution atomizing particle in flue gas, its a size of 80-100 μm simultaneously.Reducing agent delivery pump uses backflow to add the mode of frequency conversion to control the conveying capacity of ammonia, the aperture of reducing agent regulation valve is controlled according to the electromagnetic flowmeter on system superintendent road, traffic requirement can not be met when valve reaches maximum, by the way of frequency conversion, then regulate the conveying capacity of ammonia water spray pump, make the ammonia vol of feeding spraying system reach system requirements.The pressure of compressed air line to ensure just can make the good atomizing effect of reducing agent in the range of 0.3 ~ 0.6Mpa, control according to the compressed air require meter on pipeline, when force value is below or above this scope, the aperture of regulation compressed air regulating valve, compressed air pressure is made to maintain in the range of setting, to obtain good atomizing effect.
Fig. 2 show gasification/existing cyclone cylinder in mixing arrangement cement kiln end preheater top used and connected uptake flue.Cement kiln preheaters is by some grades of cyclone cylinder heat exchange unit institute tandem compounds.Each cyclone cylinder and its duct coupling constituted one-level heat exchange unit.In denitrification apparatus running, after SCR denitration reducing agent is entered connection pipeline by injection apparatus 8, immediately by high-temperature flue gas gasification, the flue gas stream being simultaneously raised is broken up and is mixed with flue gas.As shown in Figure 2.Reducing agent-flue gas mixed airflow tangentially enters at a high speed cyclone cylinder, thus does selection motion in the annulus post being forced between cylinder and exhaustor.Gas, while rotating, moves downward, and from cylinder to cone, extends to the bottom of cone and just transfers and rotate upwards, finally from exhaustor discharge.Here, utilize the cyclonic action of cyclone cylinder, strengthen flue gas disturbance, make being sufficiently mixed of flue gas and reducing agent, it is ensured that reducing agent and flue gas are arranged in the SCR denitration device 9 in downstream from the entrance of preheater exhaust pass again after dividing gasification mixing and carry out denitrification reaction.
Claims (6)
- null1. cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device，The C1 level cyclone cylinder carried including cement kiln end preheater、C2 level cyclone cylinder、C3 level cyclone cylinder、C4 level cyclone cylinder、C5 level cyclone cylinder，C1 C5 level cyclone cylinder is staggered successively by order from top to bottom，Wherein the uptake flue of C4 level cyclone cylinder is communicated to C5 level cyclone cylinder，The uptake flue of C3 level cyclone cylinder is communicated to C4 level cyclone cylinder，The uptake flue of C2 level cyclone cylinder is communicated to C3 level cyclone cylinder，The uptake flue of C1 level cyclone cylinder is communicated to C2 level cyclone cylinder，C1 level cyclone cylinder connects also by pipeline device out of stock with the SCR of far-end，It is characterized in that: also include reducing agent injection apparatus，Described reducing agent injection apparatus is arranged at the uptake flue of C1 level cyclone cylinder，Or it is arranged at the uptake flue of C2 level cyclone cylinder，Or it is arranged at the uptake flue of C3 level cyclone cylinder，Reducing agent injection apparatus sprays into the ammonia of 19.5-20.5% concentration as reducing agent in the uptake flue at place.
- Cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device the most according to claim 1, it is characterized in that: described reducing agent injection apparatus is arranged in the position that uptake flue temperature is 500 ~ 600 DEG C of C1 level cyclone cylinder, or it is arranged in the position that uptake flue temperature is 600 ~ 700 DEG C of C2 level cyclone cylinder, or is arranged in the position that uptake flue temperature is 700 ~ 750 DEG C of C3 level cyclone cylinder.
- Cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device the most according to claim 1, it is characterized in that: described reducing agent injection apparatus is the twin spray gun containing atomizer, twin spray gun is automatic telescopic or fixed, and atomizing medium is the compressed air of 0.3 ~ 0.6MPa.
- Cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device the most according to claim 1, it is characterized in that: described reducing agent injection apparatus entrance is connected with reducing agent storing feedway by reducing agent liquid line respectively, connected with compressed air feedway by compressed air line, described reducing agent storing feedway is disposed with reducing agent delivery pump in the reducing agent liquid line on reducing agent injection apparatus direction, effusion meter, reducing agent delivery pump, the reducing agent regulation valve regulating reducing agent flow between effusion meter also by feedback is connected with reducing agent storing feedway；Described compressed air feedway is disposed with compressed air require meter, compressed air regulating valve in the compressed air line on reducing agent injection apparatus direction.
- Cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device the most according to claim 1, it is characterized in that: described reducing agent injection apparatus is by regulation jet compression air capacity and the amount of reducing agent, control to be ejected into the size of reductant solution atomizing particle in flue gas, its a size of 80-100 μm.
- Cement kiln SCR denitrating flue gas reducing agent gasification/conglomerate integration device the most according to claim 1, it is characterised in that: described SCR denitration device can be high-temperature high dust arrangement, it is also possible to be middle warming middle-JIAO dirt arrangement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620152776.XU CN205412683U (en) | 2016-02-29 | 2016-02-29 | Cement kiln SCR flue gas denitration reductant gasification / mixture integrated device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620152776.XU CN205412683U (en) | 2016-02-29 | 2016-02-29 | Cement kiln SCR flue gas denitration reductant gasification / mixture integrated device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983338A (en) * | 2016-02-29 | 2016-10-05 | 合肥水泥研究设计院 | Gasification/mixing all-in-one device for SCR (Selective Catalytic Reduction) flue gas denitrification reducing agent of cement kiln |
| CN115475508A (en) * | 2022-09-28 | 2022-12-16 | 天津中材工程研究中心有限公司 | Method for judging insertion position of SNCR cyclone spray gun and automatic adjusting system |
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2016
- 2016-02-29 CN CN201620152776.XU patent/CN205412683U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983338A (en) * | 2016-02-29 | 2016-10-05 | 合肥水泥研究设计院 | Gasification/mixing all-in-one device for SCR (Selective Catalytic Reduction) flue gas denitrification reducing agent of cement kiln |
| CN115475508A (en) * | 2022-09-28 | 2022-12-16 | 天津中材工程研究中心有限公司 | Method for judging insertion position of SNCR cyclone spray gun and automatic adjusting system |
| CN115475508B (en) * | 2022-09-28 | 2024-04-30 | 天津中材工程研究中心有限公司 | Method for judging insertion position of SNCR cyclone spray gun and automatic adjustment system |
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Granted publication date: 20160803 Termination date: 20200229 |