CN207805389U - Cigarette temperature raising denitrification apparatus is mixed in a kind of stove - Google Patents
Cigarette temperature raising denitrification apparatus is mixed in a kind of stove Download PDFInfo
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- CN207805389U CN207805389U CN201721923585.XU CN201721923585U CN207805389U CN 207805389 U CN207805389 U CN 207805389U CN 201721923585 U CN201721923585 U CN 201721923585U CN 207805389 U CN207805389 U CN 207805389U
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Abstract
Cigarette temperature raising denitrification apparatus is mixed in a kind of stove of the utility model offer, including burner hearth, convection bank is equipped in convection pass outside burner hearth, the outlet of convection bank is connected with SCR denitration reactor, the outlet of SCR denitration reactor is connected with economizer, high-temperature flue, the high temperature section in the entrance connection burner hearth of high-temperature flue are respectively set at left and right sides of burner hearth；The upper horizontal of burner hearth is provided with high temperature smoke box, and the outlet of high-temperature flue connects high temperature smoke box, and high temperature smoke box connects the outlet of convection bank.The utility model draws high-temperature flue gas in burner hearth high temperature section, is mixed with the low-temperature flue gas in convection bank exit, the medium temperature flue gas needed for formation SCR denitration reactor, high financial profit, and denitration effect is good.It is respectively provided with high-temperature flue at left and right sides of burner hearth, extracts equivalent flue gas out from the both sides of boiler, high-temperature flue gas is made more uniformly to flow to SCR denitration reactor, is conducive to stablizing for denitration reaction and carries out.
Description
Technical field
The utility model belongs to flue gases purification field, and in particular to cigarette temperature raising denitrification apparatus is mixed in a kind of stove.
Background technology
Currently, air pollution increasingly attracts people's attention caused by nitrogen oxides.Control the measure of NOx emission substantially
It is divided into two classes：One kind is flue gases purification, removes the NOx in flue gas；Another kind of is low-NO_x combustion technology, passes through various technologies
Means inhibit or restore the NOx in combustion process, achieve the purpose that reduce NOx emission.
It is net currently as a kind of more mature flue gas as the selective catalysis reduction technique (SCR) of reducing agent by NH3
Change technology is widely used in station boiler, Industrial Boiler, fuel oil and gas fired-boiler, internal combustion engine, chemical plant and steel mill, takes off
Nitre efficiency is up to 90% or more.SCR denitration technology is in certain temperature range, in V2O5/TiO2 and V2O5-WO3/TiO2 etc.
Under the action of catalyst, NOx in flue gas is reduced into N2 with reducing agents such as liquefied ammonia or urea.Molding catalyst module is placed
In SCR denitration reactor babinet, the generally vertical arrangement of SCR denitration reactor, flow of flue gas passes through catalyst duct.It is wide at present
General to be applied in industry be medium temperature denitration, corresponding catalyst activity reaction temperature is 320~420 DEG C.This is because low
The catalyst of warm denitration is expensive, and the catalyst of medium temperature denitration is more economical；Medium temperature denitration more safety and stability, efficiency have
Ensure.
And in actual production, some boiler export smoke temperatures are relatively low, and the catalyst that cannot be satisfied current medium temperature denitration is wanted
The minimum operating temperature asked；In addition, boiler is often chronically at underrun, corresponding boiler tail smoke temperature is compared to design value
It is lower.Flue-gas temperature is too low so that SCR denitration is ineffective, denitrating system can be caused to stop transport when serious.Prolonged cold is run, ammonia
Production ammonium hydrogen sulfate is reacted with the SO3 in flue gas, is covered in catalyst surface, causes catalyst duct to block and wear, significantly
Catalyst life is reduced, the O＆M cost of denitrating system is improved.
Utility model content
The purpose of this utility model, which is to provide in a kind of stove, mixes cigarette temperature raising denitrification apparatus, and the temperature that can meet medium temperature denitration is wanted
Ask, the temperature of flue gas uniformly, flow speed stability, denitration reaction it is efficient.
The utility model provides the following technical solution：
Cigarette temperature raising denitrification apparatus, including burner hearth are mixed in a kind of stove, and convection bank, convection current are equipped in the convection pass outside burner hearth
The outlet of tube bank is connected with SCR denitration reactor, and the outlet of SCR denitration reactor is connected with economizer, which is characterized in that in stove
High-temperature flue, the high temperature section in the entrance connection burner hearth of high-temperature flue are respectively set at left and right sides of thorax；The upper horizontal of burner hearth
It is provided with high temperature smoke box, the outlet of high-temperature flue connects high temperature smoke box, and high temperature smoke box connects the outlet of convection bank.
Preferably, high-temperature flue is equipped with the flying dust catcher of vertical straight section volume expansion structure.
Preferably, multiple drainage hoods are equipped with below high temperature smoke box, high temperature smoke box connects going out for convection bank by drainage hood
Mouthful；Axially disposed multiple longitudinal sections are the deflector of arc in high temperature smoke box, and one end of deflector is arranged in high-temperature flue one
Side, the other end are arranged in the side of drainage hood.
Preferably, the fixed plate for fixing deflector is connected with above deflector, the other end of fixed plate is fixed on
On the inner wall of high temperature smoke box.
Preferably, multiple through-holes are equipped in deflector and fixed plate.
Preferably, the top of SCR denitration reactor is equipped with flow straightening grid.
Preferably, the junction of high-temperature flue and high temperature smoke box is equipped with electronic air register.
The utility model has the beneficial effects that：
1, high-temperature flue gas is drawn in burner hearth high temperature section, is mixed with the low-temperature flue gas in convection bank exit, form SCR denitration
Medium temperature flue gas needed for reactor, the lower boiler of smoke temperature will be exported by, which realizing, puts into operation into middling temperature DeNOx system.In burner hearth
The left and right sides be respectively provided with high-temperature flue, from the both sides of boiler extract out equivalent flue gas, so that high-temperature flue gas is more uniformly flowed to SCR
Benitration reactor is conducive to stablizing for denitration reaction and carries out.
2, the flying dust catcher of vertical straight section volume expansion structure, allows the flying dust in high-temperature flue gas to lose kinetic energy, flying dust is made to settle,
It prevents flying dust from entering in the catalyst of SCR denitration reactor, reduces catalytic efficiency.
3, the deflector of arc is set in high temperature smoke box, guiding high-temperature flue gas is flowed to drainage hood direction, keeps flue gas uniform
Distribution, flowing are quick.
4, the flow straightening grid at the top of SCR denitration reactor, the low-temperature flue gas that high-temperature flue gas can be made to be exported with convection bank
After mixing by flow straightening grid, then SCR denitration reactor is flowed to, ensures that the temperature of denitration reaction is stable, uniform.
5, the Electric Actuator of electronic air register can be improved by the inlet flue gas temperature of automatic adjustment SCR denitration reactor
Out of stock efficiency.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the left view of Fig. 1.
In figure label for：1. burner hearth；2. convection bank；3.SCR Benitration reactors；4. economizer；5. high-temperature flue；51.
Flying dust catcher；6. high temperature smoke box；61. deflector；62. fixed plate；7. drainage hood；8. flow straightening grid；9. electronic air register.
Specific implementation mode
As depicted in figs. 1 and 2, cigarette temperature raising denitrification apparatus, including burner hearth 1 are mixed in a kind of stove, in the convection pass outside burner hearth 1
Equipped with convection bank 2, the outlet of convection bank 2 is connected with SCR denitration reactor 3, and the outlet of SCR denitration reactor 3 is connected with
High-temperature flue 5, the high temperature in the entrance connection burner hearth 1 of high-temperature flue 5 is respectively set in the left and right sides of burner hearth 1 in economizer 4
Section；The upper horizontal of burner hearth 1 is provided with high temperature smoke box 6, and the outlet connection high temperature smoke box 6 of high-temperature flue 5, high temperature smoke box 6 connects
The outlet of convection bank 2.To meet SCR denitration temperature requirement, in the high temperature section extraction section high-temperature flue gas of boiler, it is drained to pair
The outlet of flowing bundle 2 is mixed with low-temperature flue gas, and the flue gas of denitration entrance is made to meet the temperature requirement of medium temperature denitration.In order to make high temperature
Flue gas is distributed more uniformly across, and high-temperature flue 5 is respectively set in the left and right sides of burner hearth 1, and equivalent cigarette is extracted out from the both sides of boiler
The flue gas of gas, both sides is collected in the high temperature smoke box 6 of 1 top of burner hearth, then the flue gas exported with convection bank 2 is uniformly mixed, real
The now more uniform and stable temperature raising function of this denitrification apparatus.
Preferably, high-temperature flue 5 is equipped with the flying dust catcher 51 of vertical straight section volume expansion structure, allows in high-temperature flue gas and flies
Ash loses kinetic energy, and flying dust is made to settle, and prevents flying dust from entering in the catalyst of SCR denitration reactor 3, the height after ash disposal
Warm flue gas is retracted into the former basal area of high-temperature flue 5 again, into high temperature smoke box 6.
Preferably, 6 lower section of high temperature smoke box is equipped with multiple drainage hoods 7, and high temperature smoke box 6 connects convection bank 2 by drainage hood 7
Outlet；Axially disposed multiple longitudinal sections are the deflector 61 of arc in high temperature smoke box 6, and one end of deflector 61 is arranged in height
5 side of warm flue, the other end are arranged in the side of drainage hood 7, and high-temperature flue gas is by the deflector 61 of arc to 7 direction of drainage hood
Flowing, flue gas are uniformly distributed, and flowing is quick.
Preferably, fixed as shown in Fig. 2, the top of deflector 61 is connected with the fixed plate 62 for fixing deflector 61
The other end of plate 62 is fixed on the inner wall of high temperature smoke box 6, and fixed plate 62 can avoid the smoke-shock deflector 61 of turbulent flow and lead
Deflector 61 is caused to loosen.
Preferably, as shown in Fig. 2, being equipped with multiple through-holes in deflector 61 and fixed plate 62, can while water conservancy diversion into
One step mixes high-temperature flue gas, and reduces the resistance to deflector 61 and fixed plate 62 to high-temperature flue gas.
Preferably, as shown in Figure 1, the top of SCR denitration reactor 3 is equipped with flow straightening grid 8, high-temperature flue gas and convection bank
The low-temperature flue gas of 2 outlets after mixing, then flow to SCR denitration reactor 3 by flow straightening grid 8.
Preferably, as shown in Figure 1, high-temperature flue 5 and the junction of high temperature smoke box 6 are equipped with electronic air register 9, electric adjustable
The Electric Actuator of air door 9 can be controlled by automatically controlling air quantity into the smoke in high temperature smoke box 6, and then adjust SCR
The inlet flue gas temperature of Benitration reactor 3 makes the temperature of denitration reaction stablize in the range of needs.
By taking certain boiler factory SHW85-1.6/150/90-H-type forced circulation high-temperature-hot-water stove as an example, this boiler is for concentrating
For warm supplying high temperature hot water, combustion apparatus uses reciprocal grate.In practice of construction, suitable temperature is chosen in boiler furnace
One end of high-temperature flue is installed in hole by interval range trepanning, is drawn high-temperature flue gas using high-temperature flue, is captured through flying dust
Device adjusts high temperature air quantity, high-temperature flue gas mixes with low-temperature flue gas through deflector, passes through into high temperature smoke box using electric flap
Flow straightening grid enters SCR denitration reactor, it is ensured that denitration carries out in suitable temperature range.When boiler at full capacity when, boiler
About 800 DEG C of inlet flue gas temperature, convection bank export about 270 DEG C of smoke temperature；The inlet flue gas temperature of SCR denitration reactor controls on 350 DEG C of left sides
It is right.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
Technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this practicality
Within novel protection domain.
Claims (7)
1. mixing cigarette temperature raising denitrification apparatus, including burner hearth in a kind of stove, convection bank, institute are equipped in the convection pass outside the burner hearth
The outlet for stating convection bank is connected with SCR denitration reactor, and the outlet of the SCR denitration reactor is connected with economizer, special
Sign is, high-temperature flue is respectively set at left and right sides of the burner hearth, and the entrance of the high-temperature flue connects in the burner hearth
High temperature section；The upper horizontal of the burner hearth is provided with high temperature smoke box, and the outlet of the high-temperature flue connects the high temperature smoke box,
The high temperature smoke box connects the outlet of the convection bank.
2. mixing cigarette temperature raising denitrification apparatus in stove according to claim 1, which is characterized in that the high-temperature flue is equipped with vertical
The flying dust catcher of formula straight section volume expansion structure.
3. mixing cigarette temperature raising denitrification apparatus in stove according to claim 1, which is characterized in that be equipped with below the high temperature smoke box
Multiple drainage hoods, the high temperature smoke box connect the outlet of the convection bank by the drainage hood；Edge in the high temperature smoke box
Axial to be arranged the deflector that multiple longitudinal sections are arc, one end setting of the deflector is described in the high-temperature flue side
The other end of deflector is arranged in the side of the drainage hood.
4. mixing cigarette temperature raising denitrification apparatus in stove according to claim 3, which is characterized in that the top of the deflector connects
It is useful for fixing the fixed plate of the deflector, the other end of the fixed plate is fixed on the inner wall of the high temperature smoke box.
5. mixing cigarette temperature raising denitrification apparatus in stove according to claim 4, which is characterized in that the deflector and the fixation
Multiple through-holes are equipped on plate.
6. mixing cigarette temperature raising denitrification apparatus in stove according to claim 1, which is characterized in that the SCR denitration reactor
Top is equipped with flow straightening grid.
7. mixing cigarette temperature raising denitrification apparatus in stove according to claim 1, which is characterized in that the high-temperature flue and the height
The junction of warm smoke box is equipped with electronic air register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923585.XU CN207805389U (en) | 2017-12-30 | 2017-12-30 | Cigarette temperature raising denitrification apparatus is mixed in a kind of stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923585.XU CN207805389U (en) | 2017-12-30 | 2017-12-30 | Cigarette temperature raising denitrification apparatus is mixed in a kind of stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207805389U true CN207805389U (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721923585.XU Active CN207805389U (en) | 2017-12-30 | 2017-12-30 | Cigarette temperature raising denitrification apparatus is mixed in a kind of stove |
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| CN (1) | CN207805389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110841442A (en) * | 2019-12-23 | 2020-02-28 | 福建龙净脱硫脱硝工程有限公司 | Denitration device and method |
-
2017
- 2017-12-30 CN CN201721923585.XU patent/CN207805389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110841442A (en) * | 2019-12-23 | 2020-02-28 | 福建龙净脱硫脱硝工程有限公司 | Denitration device and method |
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