CN207025075U - A kind of flue gas denitrification system - Google Patents
A kind of flue gas denitrification system Download PDFInfo
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- CN207025075U CN207025075U CN201720604026.6U CN201720604026U CN207025075U CN 207025075 U CN207025075 U CN 207025075U CN 201720604026 U CN201720604026 U CN 201720604026U CN 207025075 U CN207025075 U CN 207025075U
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Abstract
It the utility model is related to gas denitrifying technology field, a kind of flue gas denitrification system, including Benitration reactor, deduster and adjusting means are provided, denitration reactor inlet flue-gas temperature is improved by adjusting means, it is allowed to, higher than minimum spray ammonia temperature, ensure that denitration reaction is normally carried out；Adjusting means includes distribution plenum and hot air supply device and cold wind feedway, high-temperature flue gas and cryogenic gas, which first mix, enters back into Benitration reactor, and flue-gas temperature is unlikely to too high, and denitration reaction catalyst will not inactivate because of high temperature, ensure denitration efficiency, effectively control the escaping of ammonia.
Description
Technical field
It the utility model is related to gas denitrifying technology field, and in particular to a kind of flue gas denitrification system.
Background technology
With national economy fast development and living standards of the people increasingly raising, nationwide integrated power grid installed capacity also with
Increase, national power structure also changed, the long-term underload fortune of large-scale, high parameter fired power generating unit (coal-fired, combustion gas)
OK, depth peak regulation is participated in, it has also become the new normality that China's electric power development occurs under the new situation.As regulating units number of units constantly increases
It is more, the depth of peak regulation, the increase of continuous underrun time, and the issuing and implementation of the New emission standard such as minimum discharge, thermoelectricity
Unit normal operation is faced with severe challenge.
The work of existing SCR (Selective Catalytic Reduction, SCR) denitration technology
Temperature is at 310 DEG C -420 DEG C, and when fired power generating unit underrun, SCR catalyst inlet flue gas temperature reduces, and easily causes SCR catalysis
Agent activity decrease.Relatively low catalyst activity can increase amount of ammonia slip, generate a large amount of ammonium hydrogen sulfates and condense in catalyst surface, from
And block the micropore on SCR catalyst surface.Now, to protect SCR catalyst, it is necessary to stop spraying ammonia, SCR system is exited into fortune
OK.
For SCR denitration under underload it is out of service the problem of, the renovation technique of full load denitration at present is mainly from fume side
Several aspects such as temperature adjustment bypass, the bypass of economizer water side, economizer hierarchical arrangement and raising flue gas generation device feed temperature enter
Hand.The various technologies for improving SCR system inlet flue gas temperature are respectively provided with different advantage and disadvantage.Integrated comparative, current various transformation skills
Art and engineering example, SCR denitration system operating load scope is widened, but truly complete can not be realized
Load denitrification apparatus puts into operation, it is impossible to meets the requirement of all necessary qualified discharge under any operating load.
For above-mentioned deficiency, the U of Chinese patent CN 204962817 disclose the SCR flue gases that a kind of full load mode puts into operation
Denitrating system, its combustion-compensating device are the afterburning burner being directly arranged on denitration flue.This method can realize that flue gas produces dress
Igniting is put to the full load denitration under any operating mode of 100%BMCR loads, but denitration flue is joined directly together with combustion-compensating device, i.e.,
The high-temperature gas of the burning of combustion-compensating device directly mixes with the flue gas in denitration pipeline, easily causes local overheating or flue gas to mix
Close it is uneven, the problems such as so as to cause the escaping of ammonia, denitration efficiency to decline.
Utility model content
Therefore, the technical problems to be solved in the utility model in overcome in the prior art in flue directly set burning
Device is unfavorable for the flue gas mixing of denitrating system, easily causes local overheating or flue gas to mix uneven and cause the escaping of ammonia, denitration
The defects of efficiency declines.
Therefore, the technical scheme that the application takes is：
The utility model provides a kind of flue gas denitrification system, including：
Benitration reactor, has the second air inlet and the second gas outlet, and second air inlet is connected with the first pipeline；
Deduster, has the 3rd air inlet and the 3rd gas outlet, and the deduster passes through setting with the Benitration reactor
The second pipeline connection between the 3rd air inlet and second gas outlet；
Also include,
Adjusting means, for adjusting the temperature of flue gas in the Benitration reactor.
Optionally, the adjusting means is arranged on first pipeline by the 3rd pipeline, by anti-to the denitration
The flue gas of temperature needed for input in device is answered to adjust temperature；The adjusting means includes distribution plenum, and into the distribution plenum
The hot air supply device and cold wind feedway of high-temperature flue gas and cryogenic gas are provided respectively.
Optionally, the adjusting means includes temperature sensor, pressure sensor, controller, high-temperature flue gas regulating valve, low
Warm gas control valve；The temperature sensor is arranged at second air inlet, and is connected with the controller；The pressure
Sensor is arranged at the distribution plenum exit, and is connected with the controller；The high-temperature flue gas regulating valve is arranged at described
Hot air supply device exports；The cryogenic gas regulating valve is arranged at the cold wind feedway outlet；The controller is simultaneously
Connect the high-temperature flue gas regulating valve and the cryogenic gas regulating valve.
Optionally, the adjusting means, which also includes being arranged in the distribution plenum, is used to mixing the high-temperature flue gas and described
The mixed organization of cryogenic gas.
Optionally, the mixed organization is at least one layer of horizontally disposed deflector being arranged in the distribution plenum；Or
Person,
It is the rotating shaft for including stretching into the distribution plenum, and at least one oar being fixed in the rotating shaft outside wall surface
Leaf.
Optionally, first pipeline includes rake, and the horizontal part being molded on rake one end, the inclination
The other end in portion is connected with the first gas outlet of flue gas generation device, and the other end of the horizontal part connects second air inlet
Mouthful；3rd pipeline connects the horizontal part；
The hot air supply device is one or more groups of hot-blast stoves being set up in parallel and/or electric high-temp. fume fluidised-bed furnace；Institute
Cold wind feedway is stated to be connected to form circulation loop with the 3rd gas outlet by the 4th pipeline, or cold wind supply dress
Put and be directly connected by the 5th pipeline with air.
Optionally, the adjusting means is the heat exchange pipeline or heat exchange fin being arranged in the Benitration reactor.
Technical solutions of the utility model, have the following advantages that：
1. a kind of flue gas denitrification system provided by the utility model, including Benitration reactor and deduster, in addition to regulation
Device, for the flue gas to temperature needed for input in Benitration reactor, to adjust the temperature of flue gas in Benitration reactor, it is allowed to
In preset temperature range, ensure that denitration reaction is normally carried out, realize that large-scale, high parameter fired power generating unit realizes denitration since grid-connected
Put into operation.
Due to the gas after burning be higher than 1000 DEG C, if being directly entered Benitration reactor, can cause local overheating or
Flue gas mixing is uneven and causes the escaping of ammonia, denitration efficiency to decline.The uniform mixed flue gas of temperature is obtained by adjusting means, then
Benitration reactor is entered back into, its flue-gas temperature is adapted to catalyst activity temperature, ensures catalyst activity, so as to improve denitration
Efficiency, the escaping of ammonia is effectively controlled, realize that flue gas generation device is lighted a fire to the full load under any operating mode of 100%BMCR loads and take off
Nitre.
2. the method provided by the utility model that denitration reactor inlet cigarette temperature is adjusted using above-mentioned flue gas denitrification system, when
When the denitration reactor inlet cigarette temperature exceeds denitration reaction temperature range, by the way that the mixed flue gas of preset temperature is filled into denitration
Reactor inlet, inlet flue gas temperature is set to be maintained in denitration reaction temperature range.The mixed flue gas for obtaining preset temperature has following three
Kind approach：(1) high-temperature flue-gas is constant, changes the air demand ratio of high-temperature flue gas and cryogenic gas；(2) high-temperature flue gas and low
The air demand constant rate of warm flue gas, change high-temperature flue-gas；(3) change high-temperature flue-gas, while change the high temperature
The air demand ratio of flue gas and the cryogenic gas.Flue gas denitrification system tune can be carried out according to the suitable approach of selection is actually needed
The regulation of denitration reactor inlet cigarette temperature is saved, the mixed flue gas of preset temperature is obtained, subsequently into denitration reactor inlet, will enter
Can be in denitration reaction temperature range, the complete of SCR denitration system be realized in and simple to operate, positive effect for mouthful fibre selection
Operating mode puts into operation.
3. the adjusting means of flue gas denitrification system provided by the utility model includes distribution plenum, hot air supply device, cold wind
Feedway, and temperature sensor, pressure sensor, controller, high-temperature flue gas regulating valve, cryogenic gas regulating valve.Air distribution
Interior is provided with the mixed organization for being used for mixing high-temperature flue gas and cryogenic gas, such as deflector, blade.Temperature sensor is used to supervise
Flue-gas temperature at the second air inlet is surveyed, pressure sensor is used to monitor air distribution room pressure, and high-temperature flue gas regulating valve is used to adjust
The air demand of high-temperature flue gas, cryogenic gas regulating valve are used for the air demand for adjusting cryogenic gas.
By temperature sensor monitors the second entrance flue-gas temperature, and compared with denitration reaction temperature range, such as
Flue-gas temperature exceedes denitration reaction temperature range at the air inlet of fruit second, then controller regulation high-temperature flue gas regulating valve and low temperature gas
Body regulating valve, change the air demand ratio of high-temperature flue gas and cryogenic gas so that the flue-gas temperature of the second entrance is in denitration
In range of reaction temperature, it is ensured that denitration reaction is normally carried out.
Pressure sensor monitoring air distribution room pressure, and control high-temperature flue gas regulating valve and cryogenic gas to adjust by controller
Section valve opening size, i.e. holding distribution plenum constant, the Benitration reactor stable gas pressure to Benitration reactor into total air demand, instead
It should be normally carried out.
4. in the method provided by the utility model that denitration reactor inlet cigarette temperature is adjusted using above-mentioned flue gas denitrification system,
The flue gas after Benitration reactor can be made full use of, on the one hand can be achieved the halfway flue gas of denitration reaction re-starting denitration
Reaction, on the other hand can avoid the smoke pollution environment.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific implementation of the present utility model
Example and with reference to accompanying drawing, is described in further detail to the utility model, wherein：
Fig. 1 is to realize the flue gas denitrification system process chart described in the utility model embodiment 1；
Reference is expressed as in figure：
1- flue gas generation devices；The air inlets of 11- first；The gas outlets of 12- first；
2- Benitration reactors；The air inlets of 21- second；The gas outlets of 22- second；
3- dedusters；The air inlets of 31- the 3rd；The gas outlets of 32- the 3rd；
4- adjusting meanss；41- distribution plenums；42- hot air supply devices；43- cold wind feedways；44- deflectors；45- temperature
Spend sensor；46- pressure sensors；47- controllers；48- high-temperature flue gas regulating valves；49- cryogenic gas regulating valves；
The pipelines of 5- first；51- rakes, 52- horizontal parts；
The pipelines of 6- second；The pipelines of 7- the 3rd；The pipelines of 8- the 4th；The pipelines of 9- the 5th；10- economizers.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.As long as in addition, technical characteristic involved in the utility model different embodiments disclosed below
Conflict can is not formed each other to be combined with each other.
Embodiment 1
The present embodiment provides a kind of flue gas denitrification system, as shown in figure 1, including flue gas generation device 1, Benitration reactor 2,
Deduster 3, adjusting means 4.
As shown in figure 1, flue gas generation device 1 has the first air inlet 11 and the first gas outlet 12；Benitration reactor 2 has
Second air inlet 21 and the second gas outlet 22, Benitration reactor 2 and flue gas generation device 1 by be arranged on the second air inlet 21 with
The first pipeline 5 between first gas outlet 12 connects；Deduster 3 has the 3rd air inlet 31 and the 3rd gas outlet 32, deduster 3
It is connected with Benitration reactor 2 by the second pipeline 6 being arranged between the 3rd air inlet 31 and the second gas outlet 22；Adjusting means
4 are arranged on first pipeline 5 by the 3rd pipeline 7, for adjusting the temperature of flue gas in the Benitration reactor 2.
Above-mentioned flue gas denitrification system, flue gas caused by flue gas generation device enter denitration reactor inlet by the first pipeline,
High-temperature flue gas is provided for Benitration reactor.If the system is influenceed by operating mode, denitration reactor inlet cigarette temperature exceeds denitration reaction
During temperature range, then flue gas is introduced from the external world to denitration reactor inlet by adjusting means, this flue-gas temperature is different from flue gas
Generation device provides the temperature of flue gas, is mixed at the two denitration reactor inlet so that Benitration reactor flue gas is in denitration reaction
In temperature range, ensure that denitration reaction is normally carried out.Ash-laden gas removing dust device processing after denitration reaction can obtain dustiness
Relatively low flue gas, uses it for anything else.
As shown in figure 1, adjusting means 4 includes distribution plenum 41, hot air supply device 42 and cold wind feedway 43.Hot blast supplies
High-temperature flue gas is provided to distribution plenum to device 42, cold wind feedway 43 provides cryogenic gas to distribution plenum, and the two forms mixing
Flue gas.
As shown in figure 1, hot air supply device 42 is set up in parallel from hot-blast stove is one or more groups of.According to Benitration reactor institute
Need temperature to be set up in parallel using conventional hot-blast stove is one or more groups of, can efficiently for Benitration reactor provide needed for temperature height
Warm flue gas.As one embodiment of the present utility model, in the present embodiment, hot air supply device 42 selects one group of hot-blast stove.
As shown in figure 1, cold wind feedway 43 is connected to form circulation loop by the 4th pipeline 8 with the 3rd gas outlet 32.
Due in the flue gas after denitration reaction containing not with NH3The NO and NO of reaction2, after removing dust device dedusting, it is ensured that dustiness is less than
10mg/Nm3, enter distribution plenum 41 through the 4th pipeline, the flue-gas temperature is higher, contains a large amount of waste heats.Therefore, heat can accordingly be reduced
Wind feedway 42 conveys the supply of high-temperature flue gas to distribution plenum 41, also can guarantee that the mixed flue gas temperature in distribution plenum 41 reaches
To requiring, this is saving resource to a certain degree, while it also avoid smoke pollution air.As a reality of the present utility model
Apply example, in the present embodiment, dustiness 5mg/Nm3。
As shown in figure 1, distribution plenum 41 in set mixed organization, because high-temperature flue-gas is high (1000 DEG C of ＞), with
In air compartment, high-temperature flue gas and cryogenic gas are first mixed to get the uniform mixed flue gas of temperature, then enter back into Benitration reactor, make
Obtain flue-gas temperature therein and be unlikely to too high, denitration reaction catalyst will not inactivate because of high temperature, ensure denitration efficiency, effectively control
The escaping of ammonia processed.
As shown in figure 1, mixed organization is at least one layer of horizontally disposed deflector 44 being arranged in distribution plenum 41.As
One embodiment of the present utility model, in the present embodiment, mixed organization is three layers of deflector 44.Deflector 44 is staggered,
Increase high-temperature flue gas and cryogenic gas mixability, reach and mix homogeneous effect.
Adjusted as shown in figure 1, adjusting means 4 includes temperature sensor 45, pressure sensor 46, controller 47, high-temperature flue gas
Save valve 48, cryogenic gas regulating valve 49.Temperature sensor 45 is arranged at the second air inlet 22, monitors cigarette at the second air inlet 22
Temperature degree, and be connected with controller 47；Pressure sensor 46 is arranged at the exit of distribution plenum 41, and is connected with controller 47；It is high
Warm smoke regulating valve 48 is arranged at hot air supply device 42 and exported, for adjusting the air demand of high-temperature flue gas；Cryogenic gas is adjusted
Valve 49 is arranged at cold wind feedway 43 and exported, for adjusting the air demand of cryogenic gas；Controller 47 connects high temperature cigarette simultaneously
Gas regulating valve 48 and cryogenic gas regulating valve 49, control two valve switch.
By temperature sensor monitors the second entrance flue-gas temperature, and compared with denitration reaction temperature value, if
Flue-gas temperature exceedes denitration reaction temperature values at second air inlet, then controller regulation high-temperature flue gas regulating valve and low temperature gas
Body regulating valve, change the air demand ratio of high-temperature flue gas and cryogenic gas so that the flue-gas temperature of the second entrance is in reasonable
In the range of, it is ensured that denitration reaction just produces progress；Height is controlled by pressure sensor monitoring air distribution room pressure, and by controller
Warm smoke regulating valve and cryogenic gas control valve opening size, that is, distribution plenum is kept to enter total air demand not to Benitration reactor
Become, Benitration reactor stable gas pressure, reaction is normally carried out.
As shown in figure 1, the first pipeline 5 also includes rake 51, and the horizontal part 52 being molded on rake one end, incline
The other end of inclined portion is connected to the first gas outlet 12, and the other end of horizontal part is connected to the second air inlet 21；3rd pipeline 7 connects
In horizontal part 52.
As shown in figure 1, flue gas denitrification system also includes being arranged on economizer 10 in the first pipeline, economizer 10 is positioned at the
Between one gas outlet 12 and the rake.
As one embodiment of the present utility model, in the present embodiment, flue gas generation device is boiler；As interchangeable
Embodiment, the device that high-temperature flue gas is provided for Benitration reactor can also be other devices.As further deformation, may be used also
To be not provided with flue gas generation device, the circulatory system that Benitration reactor, deduster and adjusting means form is matched somebody with somebody with other devices
Close and use.
As interchangeable embodiment, adjusting means can also be to be arranged on the heat exchanger tube of porch in Benitration reactor
Road or heat exchange fin, or even the adjusting means of other forms, only extraneous heat supply need to be used to provide heat for Benitration reactor ensures
Reactor temperature is suitable to denitration reaction.
As interchangeable embodiment, adjusting means is temperature sensor, high-temperature flue gas regulating valve, low-temperature flue gas regulation
Valve is applied in combination, not including controller.As further deformation, adjusting means can also be pressure sensor, high-temperature flue gas
Regulating valve, low-temperature flue gas regulating valve are applied in combination, not including temperature sensor.
As interchangeable embodiment, mixed organization can also be the rotating shaft stretched into distribution plenum, and be fixed on institute
State at least one blade in rotating shaft outside wall surface.As further deformation, distribution plenum can also be not provided with mixed organization, be one
Cavity, high-temperature flue gas and cryogenic gas is only needed to mix.
As interchangeable embodiment, hot air supply device can also be that electric high-temp. fume fluidised-bed furnace is one or more groups of simultaneously
Row are set, or with hot-blast stove is one or more groups of is used cooperatively, only need that high-temperature flue gas can be provided.
As interchangeable embodiment, cold wind feedway can also be directly connected by the 5th pipeline with air, be adopted
It is simple and easy to do by the use of air as cryogenic gas.As further deformation, cold wind feedway can also be simultaneously anti-using denitration
Flue gas and air after answering, only need that cryogenic gas can be provided for adjusting means.
As interchangeable embodiment, the 3rd pipeline for conveying mixed flue gas is arranged on the inclination of the first pipeline
Portion, only mixed flue gas need to be passed through Benitration reactor.As further deformation, the first pipeline can also be arranged to other
Structure type is connected with the second air inlet of Benitration reactor.
As interchangeable embodiment, flue gas denitrification system can also be not provided with economizer.
Embodiment 2
The present embodiment provides the side that a kind of flue gas denitrification system using embodiment 1 adjusts denitration reactor inlet cigarette temperature
Method, including：
When the denitration reactor inlet cigarette temperature exceeds denitration reaction temperature range, by changing high-temperature flue-gas
And/or change the air demand ratio of the high-temperature flue gas and the cryogenic gas, the mixed flue gas of preset temperature is obtained, the mixing
Flue gas enters denitration reactor inlet, inlet flue gas temperature is in denitration reaction temperature range, denitration reaction is normally carried out.
Specifically, when denitrating system is lighted a fire, temperature sensor 45 monitors the inlet flue gas temperature of Benitration reactor 2, and now, denitration is anti-
Answer the inlet flue gas temperature of device 2 can not be carried out far below minimum spray ammonia temperature, denitration reaction.Hot-blast stove is opened, is increased in the unit interval
Fuel duty, high-temperature flue-gas caused by hot-blast stove constantly rise.According to the temperature signal of temperature sensor 45, controller
47 unlatching high-temperature flue gas regulating valves 48 and low-temperature flue gas regulating valve 49, high-temperature flue gas caused by hot-blast stove enter distribution plenum 41, empty
Gas enters distribution plenum 41 by the 5th pipeline 8.Now, the aperture of controller control high-temperature flue gas regulating valve 48 is adjusted more than low-temperature flue gas
The aperture of valve 49, then the air demand of high-temperature flue gas be more than the air demand of cryogenic gas, on the mixed flue gas constant temperature in distribution plenum
Rise, mixed flue gas obtains the uniform mixed flue gas of temperature through the flowing of turning back of distribution plenum inner deflector.Mixed flue gas is through the 3rd pipeline 7
Into in the first pipeline 5, the entrance flue gas temperature of Benitration reactor 2 persistently raises.When higher than minimum spray ammonia temperature, start to de-
NH is passed through in nitre system3、NO、NO2, denitration reaction normally starts.In the present embodiment, mixed flue gas temperature is 600 in distribution plenum
DEG C, dustiness 5mg/Nm3。
In distribution plenum 41 in the continuous uphill process of temperature T, pressure sensor 46 monitor distribution plenum 41 in pressure, according to
(n is the material of mixed gas to functional relation PV=nRT in air compartment between mixed gas pressure intensity P, volume V and absolute temperature T
Amount, R is gas constant (proportionality constant)), controller 47 reduces high-temperature flue gas regulation according to the pressure signal of pressure sensor 46
Valve 48 and the aperture of low-temperature flue gas regulating valve 49, i.e., reduced to air distribution indoor gas supply, volume V reduces, then in distribution plenum 41
Keep pressure P invariable, denitration reaction is stable to be carried out.
As interchangeable embodiment, the preset temperature of mixed flue gas can also be controlled as 580~620 in distribution plenum
Other temperature in the range of DEG C, the purpose of this utility model can be achieved, belong to the scope of protection of the utility model.
As interchangeable embodiment, the dustiness of mixed flue gas can also be less than 10mg/Nm in distribution plenum3's
Other numerical value, such as 1mg/Nm3, 3mg/Nm3, 7mg/Nm3, 10mg/Nm3Etc., the purpose of this utility model can be achieved, belong to
The scope of protection of the utility model.
As interchangeable embodiment, manual mode can be also used, i.e., is changed according to inlet flue gas temperature, control high-temperature flue gas
Valve and cryogenic gas valve opening or closing and aperture size control the high-temperature flue gas to enter distribution plenum with cryogenic gas
Air demand ratio, inlet flue gas temperature need to be only adjusted to denitration reaction temperature range., can also be right as further deformation
Distribution plenum detects without pressure.
As interchangeable embodiment, when denitration reactor inlet cigarette temperature exceeds denitration reaction temperature range, also may be used
To keep the air demand constant rate of high-temperature flue gas and cryogenic gas, i.e. high-temperature flue gas regulating valve and cryogenic gas control valve opening
It is constant, change mixed flue gas temperature in distribution plenum by changing high-temperature flue-gas.The mode for changing high-temperature flue-gas can
Realized using the fuel duty in the hot air supply device unit interval is increased or decreased.
As interchangeable embodiment, high-temperature flue-gas can also be kept constant, by changing high-temperature flue gas and low
The air demand ratio of wet body changes mixed flue gas temperature in distribution plenum.Change the air demand ratio of high-temperature flue gas and cryogenic gas
Example can be realized using control high-temperature flue gas regulating valve and cryogenic gas control valve opening.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (7)
- A kind of 1. flue gas denitrification system, it is characterised in that including：Benitration reactor (2), there is the second air inlet (21) and the second gas outlet (22), second air inlet (21) and first Pipeline (5) connects；Deduster (3), there is the 3rd air inlet (31) and the 3rd gas outlet (32), the deduster (3) and the denitration reaction Device (2) is connected by the second pipeline (6) being arranged between the 3rd air inlet (31) and second gas outlet (22)；Also include,Adjusting means (4), for adjusting the temperature of the Benitration reactor (2) interior flue gas.
- 2. flue gas denitrification system according to claim 1, it is characterised in that the adjusting means (4) passes through the 3rd pipeline (7) it is arranged on first pipeline (5), by the flue gas to temperature needed for input in the Benitration reactor (2) to adjust Temperature；The adjusting means (4) includes distribution plenum (41), and provides into the distribution plenum (41) high-temperature flue gas and low respectively The hot air supply device (42) and cold wind feedway (43) of wet body.
- 3. flue gas denitrification system according to claim 2, it is characterised in that the adjusting means (4) includes TEMP Device (45), pressure sensor (46), controller (47), high-temperature flue gas regulating valve (48), cryogenic gas regulating valve (49)；The temperature Degree sensor (45) is arranged at the second air inlet (21) place, and is connected with the controller (47)；The pressure sensor (46) distribution plenum (41) exit is arranged at, and is connected with the controller (47)；The high-temperature flue gas regulating valve (48) It is arranged at the hot air supply device (42) outlet；The cryogenic gas regulating valve (49) is arranged at the cold wind feedway (43) export；The controller (47) while connect the high-temperature flue gas regulating valve (48) and the cryogenic gas regulating valve (49)。
- 4. the flue gas denitrification system according to Claims 2 or 3, it is characterised in that the adjusting means (4) also includes setting It is used for the mixed organization for mixing the high-temperature flue gas and the cryogenic gas in the distribution plenum (41).
- 5. flue gas denitrification system according to claim 4, it is characterised in that the mixed organization is to be arranged on the air distribution At least one layer of horizontally disposed deflector (44) in room (41)；OrIt is the rotating shaft for including stretching into the distribution plenum, and at least one blade being fixed in the rotating shaft outside wall surface.
- 6. the flue gas denitrification system according to Claims 2 or 3, it is characterised in that first pipeline (5) includes rake (51), and the horizontal part (52) that is molded on rake one end, the other end of the rake (51) are connected with flue gas generation The first gas outlet (12) of device (1), the other end of the horizontal part (52) connect second air inlet (21)；Described 3rd Pipeline (7) connects the horizontal part (52)；The hot air supply device (42) is one or more groups of hot-blast stoves being set up in parallel and/or electric high-temp. fume fluidised-bed furnace；Institute State cold wind feedway (43) to be connected to form circulation loop with the 3rd gas outlet (32) by the 4th pipeline (8), Huo Zhesuo Cold wind feedway (43) is stated by the 5th pipeline (9) directly with air to be connected.
- 7. flue gas denitrification system according to claim 1, it is characterised in that the adjusting means (4) is described to be arranged on The interior heat exchange pipeline of Benitration reactor (2) or heat exchange fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720604026.6U CN207025075U (en) | 2017-05-26 | 2017-05-26 | A kind of flue gas denitrification system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720604026.6U CN207025075U (en) | 2017-05-26 | 2017-05-26 | A kind of flue gas denitrification system |
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| CN207025075U true CN207025075U (en) | 2018-02-23 |
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| CN201720604026.6U Withdrawn - After Issue CN207025075U (en) | 2017-05-26 | 2017-05-26 | A kind of flue gas denitrification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126834A (en) * | 2017-05-26 | 2017-09-05 | 中国华电集团科学技术研究总院有限公司 | A kind of flue gas denitrification system and method for denitration |
| CN115301056A (en) * | 2022-08-31 | 2022-11-08 | 阳江翌川金属科技有限公司 | Denitration flue gas interlocking control system and denitration process |
-
2017
- 2017-05-26 CN CN201720604026.6U patent/CN207025075U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126834A (en) * | 2017-05-26 | 2017-09-05 | 中国华电集团科学技术研究总院有限公司 | A kind of flue gas denitrification system and method for denitration |
| CN107126834B (en) * | 2017-05-26 | 2023-07-04 | 中国华电集团科学技术研究总院有限公司 | Flue gas denitration system and denitration method |
| CN115301056A (en) * | 2022-08-31 | 2022-11-08 | 阳江翌川金属科技有限公司 | Denitration flue gas interlocking control system and denitration process |
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