CN208115518U - A kind of dual forked type reinforcing mixed flue gas denitrification apparatus - Google Patents
A kind of dual forked type reinforcing mixed flue gas denitrification apparatus Download PDFInfo
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- CN208115518U CN208115518U CN201820387159.7U CN201820387159U CN208115518U CN 208115518 U CN208115518 U CN 208115518U CN 201820387159 U CN201820387159 U CN 201820387159U CN 208115518 U CN208115518 U CN 208115518U
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- flue gas
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- spraying grid
- denitrification apparatus
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Abstract
The utility model discloses a kind of dual forked types to strengthen mixed flue gas denitrification apparatus, including flue, ammonia-spraying grid main pipe, it is characterised in that：The flue is vertically arranged; lateral ammonia-spraying grid branch pipe is equipped in flue; ammonia-spraying grid branch pipe is connected with ammonia-spraying grid main pipe; the ammonia-spraying grid branch pipe top constant spacing is equipped with several groups nozzle; every group of nozzle is two; point both sides tilt upwards at an angle with vertical direction; the upper end of the nozzle is equipped with spoiler; the ammonia that the utility model is conducive to spray into flue is sufficiently mixed with flue gas; obtain the flow fields environment of best catalytic reduction reaction; denitration efficiency is improved, environment is protected.
Description
Technical field
The utility model relates to the technical fields of denitrating flue gas, and in particular to a kind of dual forked type reinforcing mixed flue gas denitration dress
It sets.
Background technique
To promote Coal Cleanization to utilize and improving atmosphere quality, in December, 2015, Executive Meeting of the State Council is determined,
Minimum discharge and reducing energy consumption are implemented in full to coal-burning power plant before the year two thousand twenty.The main contents of minimum discharge are exactly in flue gas
Sulfur dioxide, nitrogen oxides and dust emission concentration are no more than 10 mg/m3,35 mg/m3,50 mg/m3 respectively.
Selective catalytic reduction（SCR）Gas denitrifying technology is because of denitration efficiency height, and technology maturation is stable, reliable, work
Make the features such as temperature is low, and becomes the technology for realizing Large-sized Coal-fired Power group flue gas nitrogen oxide minimum discharge most mainstream.It is basic
Principle be under the conditions of certain temperature, using ammonia as reducing agent, by ammonia-spraying grid injection flue, then in reactor,
The NOx in flue gas is reduced to N2 and H2O in catalytic action.Field requirements are to influence the most crucial key factor of SCR denitration efficiency
One of, in order to guarantee the good denitration performance of system, it need to determine that internal system velocity of flue gas is uniformly distributed.National regulations are reacting
The requirement of the upper surface of device first layer catalyst is that the maximum deviation coefficient of concentration is no more than ± 5%, existing routine ammonia-spraying grid arrangement
It is single injector, reducing agent injection direction is consistent with flow of flue gas direction, and that there are mixed effects is undesirable for this arrangement of nozzles mode,
If minimum discharge flow field technical requirements need to be reached, it is often possible to need to increase flue length to extend ammonia air mixing distance, or
Person improves mixed effect by adding static mixer, not only increases cost of investment, also adds system operation cost.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of dual forked type reinforcing mixing cigarette
Gas denitrification apparatus.
To achieve the above object, the technical scheme adopted by the utility model is that：
A kind of dual forked type reinforcing mixed flue gas denitrification apparatus, including flue, ammonia-spraying grid main pipe, the flue are vertical
Setting, flue is interior to be equipped with lateral ammonia-spraying grid branch pipe, and ammonia-spraying grid branch pipe is connected with ammonia-spraying grid main pipe, the spray ammonia lattice
Grid branch pipe top constant spacing is equipped with several groups nozzle, and every group of nozzle is two, divide both sides and vertical direction at an angle to
The upper end of upper inclination, the nozzle is equipped with spoiler.
Preferably, the spoiler is circle, the diameter of spoiler is 100-500mm, and spoiler is set to distance spray
At mouthpiece 10-20mm.
Preferably, the bottom surface of the spoiler is equipped with high temperature resistant metal film.
Preferably, the spoiler is detachable installation, it is easy to clean.
Preferably, the angle of the nozzle and vertical direction is 40-50 °.
Preferably, the angle of the nozzle and vertical direction is 45 °.
Preferably, the diameter of the nozzle is 10mm, the spacing of each group of nozzle is 120mm.
A kind of dual forked type described in the utility model strengthens mixed flue gas denitrification apparatus, compensates for the deficiencies in the prior art,
The inclined nozzle of dual forked type, the air-flow shape in the ammonia and flue gas being sparged into is at a certain angle, is conducive to reinforce ammonia and flue
The mixing of interior flue gas, while the presence of spoiler makes flue gas that can generate vortex not of uniform size behind spoiler, is conducive to
Ammonia is sufficiently mixed with flue gas, greatlys save mixing length and time, and flue gas in ammonia and flue is effectively ensured and reaches first layer
Full and uniform mixing before catalysis top, can get the flow fields environment of best catalytic reduction reaction, so that ammonia nitrogen molar ratio is anti-
It answers and meets concentration deviation factor above device first layer catalyst no more than 5%, greatly improve denitration efficiency, be discharged nitrous oxides
Concentration reaches minimum discharge requirement raising and fully ensures that, while save the cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model nozzle.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and examples.
As shown, a kind of dual forked type strengthens mixed flue gas denitrification apparatus, including flue 5, ammonia-spraying grid main pipe 4, it is described
Flue 5 be vertically arranged, lateral ammonia-spraying grid branch pipe 2, ammonia-spraying grid branch pipe 2 and ammonia-spraying grid main pipe 4 are equipped in flue 5
Be connected, the 2 top constant spacing of ammonia-spraying grid branch pipe is equipped with several groups nozzle 1, and every group of nozzle 1 is two, divide both sides with
Vertical direction tilts upwards at an angle, and the upper end of the nozzle 1 is equipped with spoiler 3, and the spoiler 3 is circle,
The diameter of spoiler 3 is 100-500mm, and spoiler 3 is set to the bottom surface of the spoiler 3 at jet hole 10-20mm
Equipped with high temperature resistant metal film, the spoiler 3 is detachable installation, and the angle of the nozzle 1 and vertical direction is 40-
50 °, the diameter of the nozzle 1 is 10mm, and the spacing of each group of nozzle 1 is 120mm.
Equipment for denitrifying flue gas described in the utility model, the inclined nozzle of dual forked type, in the ammonia and flue gas being sparged into
Air-flow shape is at a certain angle, is conducive to the mixing for reinforcing flue gas in ammonia and flue, when flue gas flows from the bottom up in flue,
By vortex not of uniform size can be generated behind spoiler when spoiler, is conducive to ammonia and is sufficiently mixed with flue gas, significantly
Improve denitration efficiency, save ammonia cost, simultaneously because save mixing length and time, can by shorten flue length come
Save the cost.
It is learnt by largely testing, when the diameter of nozzle is 10mm, the spacing of each group of nozzle is 120mm, nozzle and perpendicular
Histogram to angle be 50 °, the diameter of spoiler is that 100mm can reach more when spoiler is set at jet hole 10mm
Ideal denitration effect, we can also set spoiler to the mode of angle adjustable, meet flue gas need different in flow rate
It asks, since flue gas is high temperature, and has solid particle polluter, impurity can be accumulated in spoiler bottom for a long time, while high
Temperature can cause to damage to spoiler, set a high temperature resistant metal film to extend the service life of spoiler, together in spoiler bottom surface
When be not easy accumulate impurity, be convenient to clean.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., is all contained in the protection of the utility model within novel spirit and principle
Within the scope of.
Claims (7)
1. a kind of dual forked type strengthens mixed flue gas denitrification apparatus, including flue, ammonia-spraying grid main pipe, it is characterised in that：Described
Flue is vertically arranged, and lateral ammonia-spraying grid branch pipe is equipped in flue, and ammonia-spraying grid branch pipe is connected with ammonia-spraying grid main pipe, institute
The ammonia-spraying grid branch pipe top constant spacing stated is equipped with several groups nozzle, and every group of nozzle is two, and point both sides are in vertical direction
Certain angle tilts upwards, and the upper end of the nozzle is equipped with spoiler.
2. a kind of dual forked type according to claim 1 strengthens mixed flue gas denitrification apparatus, which is characterized in that the flow-disturbing
Plate is circle, and the diameter of spoiler is 50-100mm, and spoiler is set at jet hole 10-20mm.
3. a kind of dual forked type according to claim 2 strengthens mixed flue gas denitrification apparatus, which is characterized in that the flow-disturbing
The bottom surface of plate is equipped with high temperature resistant metal film.
4. a kind of dual forked type according to claim 3 strengthens mixed flue gas denitrification apparatus, which is characterized in that the flow-disturbing
Plate is detachable installation.
5. a kind of dual forked type according to claim 1 strengthens mixed flue gas denitrification apparatus, which is characterized in that the nozzle
Angle with vertical direction is 40-50 °.
6. a kind of dual forked type according to claim 5 strengthens mixed flue gas denitrification apparatus, which is characterized in that the nozzle
Angle with vertical direction is 45 °.
7. a kind of dual forked type according to claim 6 strengthens mixed flue gas denitrification apparatus, which is characterized in that the nozzle
Diameter be 10mm, the spacing of each group of nozzle is 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820387159.7U CN208115518U (en) | 2018-03-21 | 2018-03-21 | A kind of dual forked type reinforcing mixed flue gas denitrification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820387159.7U CN208115518U (en) | 2018-03-21 | 2018-03-21 | A kind of dual forked type reinforcing mixed flue gas denitrification apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
-
2018
- 2018-03-21 CN CN201820387159.7U patent/CN208115518U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
| CN109316902B (en) * | 2018-12-07 | 2023-06-09 | 国家能源集团科学技术研究院有限公司 | Multi-point cyclone vortex mixing flow equalizing multi-pollutant deep purifying system |
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