CN204601997U - A kind of boiler smoke and ammonia mixing arrangement - Google Patents
A kind of boiler smoke and ammonia mixing arrangement Download PDFInfo
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- CN204601997U CN204601997U CN201520196980.7U CN201520196980U CN204601997U CN 204601997 U CN204601997 U CN 204601997U CN 201520196980 U CN201520196980 U CN 201520196980U CN 204601997 U CN204601997 U CN 204601997U
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- eddy current
- venturi rod
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- flue gas
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Abstract
The utility model discloses a kind of boiler smoke and ammonia mixing arrangement, comprise make rising flue gas produce eddy current eddy current mixed plate, be arranged on the ammonia playpipe above eddy current mixed plate and be arranged on the Venturi rod mechanism in eddy current mixed plate downstream, described Venturi rod mechanism comprises one or more layers Venturi rod layer, Venturi rod in every layer of Venturi rod layer is round tube or oval pipe, the direction of described ammonia playpipe ejection ammonia is contrary with flow of flue gas direction, and the distance of described Venturi rod mechanism distance eddy current mixed plate is 2 ~ 4m.The utility model has the advantages that: before the catalyst that flue gas can be made to arrive in Benitration reactor, NO in the flue gas that in mixed flue gas, each is put
xand NH
3mix deviation within ± 5%, can NH be reached completely
3/ NO
xwell-mixed object, and equipment is simple, cost province, strong adaptability, maintenance are simple, effective.
Description
Technical field
The utility model relates to a kind of boiler smoke and ammonia mixing arrangement.
Background technology
NO in the boiler exhaust gas utilizing coal to be the energy
xdischarge becomes contaminated environment major reason, the mainstream technology of current denitration is that catalysts selective reduction technique (SCR) obtains good effect, the wherein Homogeneous phase mixing of flue gas and reducing agent ammonia, and flue gas enters reactor through over commutation with stable fluidised form after blending, this is one of core of technology.Current scheme has two kinds, and one, grating type ammonia blender, its operation principle is: it is inner that ammonia-spraying grid is arranged on the flue leading to SCR reactor.Arranging ammonia nozzle as much as possible is evenly distributed on flue cross section, and its pipeline arranges adjusting device, and the ammonia sprayed into can be mixed with flue gas, and arrange after blending one section of straight flue make flue gas natural commutation steadily after enter reactor.Two, vortex mixer, its operation principle is: the gas approach section of reactor arranges eddy current mixed plate, flue gas is made to produce eddy current, the winding-up of eddy current mixed plate aimed at by ammonia pipeline, on eddy current mixed plate, diffusion mixes with the flue gas producing eddy current, and the straight section flue (more than 12 meters) arranging a section longer after blending makes flue gas natural commutation steadily enter reactor afterwards.
The technological deficiency of above-mentioned two schemes, one, grating type ammonia blender: be in operation discovery, reach the object that ammonia mixes with flue gas, the quantity of nozzle and pipeline thereof is many, regulates each valve opening comparatively numerous and diverse, simultaneously because nozzle quantity is more, nozzle bore is little, nozzle clogging in high dust atmosphere happens occasionally, and has a strong impact on the mix uniformly effect of ammonia and flue gas, and then causes that denitration efficiency is low, the escaping of ammonia raises and causes secondary pollution.Two, the simple mixed effect of vortex mixer equipment is not good enough, the requirement meeting the denitration uniformity can not be mixed very uniformly, and this technology must provide the straight section flue of more than 12 meters after eddy current mixed plate, to allow flue gas in flue through natural commutation, stable fluidised form is formed before making flue gas enter reactor, this restrict the enforcement of engineering, add cost and engineering difficulty, the scope of application is reduced greatly.
Utility model content
The purpose of this utility model is to provide a kind of boiler smoke and ammonia mixing arrangement, effectively can solve existing boiler smoke and mix uneven problem with ammonia mixing arrangement.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of boiler smoke and ammonia mixing arrangement, comprise the eddy current mixed plate making rising flue gas produce eddy current, be arranged on the ammonia playpipe above eddy current mixed plate and the Venturi rod mechanism being arranged on eddy current mixed plate downstream, described Venturi rod mechanism comprises one or more layers Venturi rod layer, Venturi rod in every layer of Venturi rod layer is round tube or oval pipe, the direction of described ammonia playpipe ejection ammonia is contrary with flow of flue gas direction, the distance of described Venturi rod mechanism distance eddy current mixed plate is 2 ~ 4m.
Preferably, the superiors' Venturi rod is vertical with elbow exhanst gas outlet direction, flue top, and the spacing between every layer of Venturi rod layer is 1 ~ 2m, and the negotiable area of every layer of Venturi rod layer is 60% ~ 80% of flue sectional area; Reserve suitable distance turbulization and make gas and vapor permeation, the too little flue gas that can hinder of circulation area passes through, and makes flue gas in pipeline too much affect turbulent flow and produces, and circulation area makes too greatly the too low turbulent flow that can affect equally of flow velocity produce.
Preferably, described Venturi rod mechanism comprises multilayer Venturi rod layer, and adjacent two-layer Venturi rod layer is parallel to each other, and adjacent Venturi rod layer rod is between layers mutually vertical; Best gas and vapor permeation effect can be reached.
Preferably, the face that described eddy current mixed plate is relative with ammonia playpipe is plane and acutangulates with horizontal plane, and described eddy current mixed plate and the right face of Gas phase Smoke are the arcwall face protruded towards flue gas; After flue gas blows to eddy current mixed plate, form eddy current in its surrounding.
Compared with prior art, the utility model has the advantages that: before the catalyst that flue gas can be made to arrive in Benitration reactor, NO in the flue gas that in mixed flue gas, each is put
xand NH
3mix deviation within ± 5%, can NH be reached completely
3/ NO
xwell-mixed object, and can shorten the straight section flue length after mixed flow, equipment is simple, cost province, strong adaptability, maintenance are simple, effective.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of boiler smoke of the utility model and ammonia mixing arrangement;
Fig. 2 is that in Fig. 1, A place flue gas flows through eddy current mixed plate formation eddy current schematic diagram.
Detailed description of the invention
Consult the embodiment that Fig. 1 is a kind of boiler smoke of the utility model and ammonia mixing arrangement, a kind of boiler smoke and ammonia mixing arrangement, comprise the eddy current mixed plate 2 making rising flue gas produce eddy current, be arranged on the ammonia playpipe 3 above eddy current mixed plate 2 and the Venturi rod mechanism being arranged on eddy current mixed plate 2 downstream, the direction that described ammonia playpipe 3 sprays ammonia is contrary with flow of flue gas direction, the distance of described Venturi rod mechanism distance eddy current mixed plate 2 is 2 ~ 4m, described Venturi rod mechanism comprises at least two-layer Venturi rod layer 4, spacing between every layer of Venturi rod layer 4 is 1 ~ 2m, the negotiable area of every layer of Venturi rod layer 4 is 60% ~ 80% of flue 1 sectional area, adjacent two-layer Venturi rod layer 4 is parallel to each other, adjacent Venturi rod layer 4 rod is between layers mutually vertical, Venturi rod in every layer of Venturi rod layer 4 is round tube or oval pipe, the superiors' Venturi rod is vertical with elbow exhanst gas outlet direction, flue top.
The face that described eddy current mixed plate 2 is relative with ammonia playpipe 3 is plane and acutangulates with horizontal plane, and described eddy current mixed plate 2 face right with Gas phase Smoke is the arcwall face protruded towards flue gas.
As shown in Figure 2, ammonia is incorporated into flue 1 through pipeline inner, sprays to vortex mixer center by ammonia playpipe 3, the injection direction of ammonia is inverse flue gas direction.Ammonia playpipe 3 and eddy current mixed plate 2 maintain a certain distance.After flue gas 5 blows to eddy current mixed plate 2, form eddy current in its surrounding.After ammonia 6 is ejected into the lee face of eddy current mixed plate 2, the plane to eddy current mixed plate 2 is scattered to surrounding, and in the mixing of flue gas eddy current, completes preliminary mixing.Mixed flue gas after flue gas mixes with ammonia entered Venturi rod layer 4 after entering short-range rectification, flue gas is separated into several parts, because the circulation area of venturi layer reduces, flue gas flow rate is increased sharply, form turbulent flow, violent mixing is carried out in the various piece made inside.Flue gas to leave after venturi and bout rapidly, and forms eddy current at the back side of Venturi rod, mixes uniformly, thus reach the target mixed completely to carrying out exquisiteness between each local of flue gas.
The foregoing is only specific embodiment of the utility model, but technical characteristic of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and the change done or modification are all encompassed among the scope of the claims of the present utility model.
Claims (4)
1. a boiler smoke and ammonia mixing arrangement, it is characterized in that: comprise the eddy current mixed plate (2) making rising flue gas produce eddy current, be arranged on the ammonia playpipe (3) of eddy current mixed plate (2) top and be arranged on the Venturi rod mechanism in eddy current mixed plate (2) downstream, described Venturi rod mechanism comprises one or more layers Venturi rod layer (4), Venturi rod in every layer of Venturi rod layer (4) is round tube or oval pipe, the direction of described ammonia playpipe (3) ejection ammonia is contrary with flow of flue gas direction, the distance of described Venturi rod mechanism distance eddy current mixed plate (2) is 2 ~ 4m.
2. a kind of boiler smoke as claimed in claim 1 and ammonia mixing arrangement, it is characterized in that: the superiors' Venturi rod is vertical with elbow exhanst gas outlet direction, flue top, spacing between every layer of Venturi rod layer (4) is 1 ~ 2m, and the negotiable area of every layer of Venturi rod layer (4) is 60% ~ 80% of flue (1) sectional area.
3. a kind of boiler smoke as claimed in claim 1 or 2 and ammonia mixing arrangement, it is characterized in that: described Venturi rod mechanism comprises multilayer Venturi rod layer (4), adjacent two-layer Venturi rod layer (4) is parallel to each other, and adjacent Venturi rod layer (4) rod is between layers mutually vertical.
4. a kind of boiler smoke as claimed in claim 1 and ammonia mixing arrangement, it is characterized in that: described eddy current mixed plate (2) face relative with ammonia playpipe (3) is plane and acutangulates with horizontal plane, described eddy current mixed plate (2) face right with Gas phase Smoke is the arcwall face protruded towards flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520196980.7U CN204601997U (en) | 2015-04-02 | 2015-04-02 | A kind of boiler smoke and ammonia mixing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520196980.7U CN204601997U (en) | 2015-04-02 | 2015-04-02 | A kind of boiler smoke and ammonia mixing arrangement |
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| CN204601997U true CN204601997U (en) | 2015-09-02 |
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| CN201520196980.7U Active CN204601997U (en) | 2015-04-02 | 2015-04-02 | A kind of boiler smoke and ammonia mixing arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854557A (en) * | 2016-04-21 | 2016-08-17 | 上海迪夫格环境科技有限公司 | Method and device for evenly spraying alkali liquor to remove sulfur trioxide in exhaust gas |
| CN107213811A (en) * | 2017-05-25 | 2017-09-29 | 中国水利水电科学研究院 | Flow mixing device based on Karman vortex street |
| CN114682088A (en) * | 2022-04-02 | 2022-07-01 | 大唐林州热电有限责任公司 | Ejector applied to matrix nozzle |
-
2015
- 2015-04-02 CN CN201520196980.7U patent/CN204601997U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854557A (en) * | 2016-04-21 | 2016-08-17 | 上海迪夫格环境科技有限公司 | Method and device for evenly spraying alkali liquor to remove sulfur trioxide in exhaust gas |
| CN107213811A (en) * | 2017-05-25 | 2017-09-29 | 中国水利水电科学研究院 | Flow mixing device based on Karman vortex street |
| CN114682088A (en) * | 2022-04-02 | 2022-07-01 | 大唐林州热电有限责任公司 | Ejector applied to matrix nozzle |
| CN114682088B (en) * | 2022-04-02 | 2023-08-08 | 大唐林州热电有限责任公司 | Injector applied to matrix nozzle |
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| GR01 | Patent grant |