CN201906563U - n-shaped cold model experiment device for flue gas denitration - Google Patents
n-shaped cold model experiment device for flue gas denitration Download PDFInfo
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- CN201906563U CN201906563U CN2010205515228U CN201020551522U CN201906563U CN 201906563 U CN201906563 U CN 201906563U CN 2010205515228 U CN2010205515228 U CN 2010205515228U CN 201020551522 U CN201020551522 U CN 201020551522U CN 201906563 U CN201906563 U CN 201906563U
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- conduit enclosure
- deflector
- spray ammonia
- flue gas
- centrifugal fan
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Abstract
An n-shaped cold model experiment device for flue gas denitration belongs to the technical field of thermal power generation and comprises a pipeline casing, flow guiding plates, a rectification layer, perforated pressure loss resistance plates, a simulate ammonia injection nozzle array, an experiment pipeline air supply module and a trace gas spraying module. By using the n-shaped cold model experiment device for flue gas denitration, better ammonia and nitrogen oxides mixing and distributing effects can be achieved, the denitration efficiency is improved, and the environment pollution is relieved.
Description
Technical field
The utility model relates to the device in a kind of coal-burning boiler denitration technology field, specifically is that a kind of II type that is used for denitrating flue gas is arranged cold mould experimental provision.
Background technology
Selective catalytic reduction is that remove nitrogen oxide in the boiler exhaust gas the most common also is effective method the most, is widely used in each industrial circle.Its cardinal principle is to adopt liquefied ammonia or ammoniacal liquor as reducing agent, with its with the flue of the upstream that sprays into the SCR reactor after air mixes in, under the effect of catalyst with flue gas in nitrogen oxide react the harmless nitrogen G﹠W discharge system of generation.Wherein the mixing of ammonia and nitrogen oxide and distribution effect are one of the key factors that influences the denitration efficiency of flue gas.
Find through retrieval prior art, Dong Xiaohong, Ni Yun at " discussion of coal steam-electric plant smoke denitration technology " (Inner Mongol environmental science the 20th volume, the 1st phase, in February, 2008) introduced the generation approach of thermal power plant's coal-fired boiler NOx in, domestic and international various denitration technology methods, selective catalytic reduction flue gas denitration technical characterstic and different catalysts pattern performance relatively wait achievement in research at present.But since bad in this technology to the undesirable mixing of ammonia and nitrogen oxide and the distribution effect of making of cold conditions bath scaled model experimental device design, cause denitration efficiency low excessively, and environmental pollution is serious, the wasting of resources.
The utility model content
The utility model provides a kind of П type that is used for denitrating flue gas to arrange cold mould experimental provision at the prior art above shortcomings, can obtain the mixing and the distribution effect of better ammonia and nitrogen oxide, improves denitration efficiency, alleviates environmental pollution.
The utility model is achieved through the following technical solutions, and the utility model comprises: conduit enclosure, deflector, rectification layer, crushing flaps with holes, simulation spray ammonia mouth array, experimental channel air feed module and search gas jet module, wherein:
Described conduit enclosure is the transparent pipeline of П type structure, is provided with three bent angles in П type structure, and the whole pipe shell is horizontal distribution.
Described deflector is an arc-shaped structure, and the radian of its circular arc is 90 °, and the length of deflector is identical with the width of conduit enclosure, and this deflector specifically is positioned at the corner of described conduit enclosure.
The outside of described conduit enclosure is provided with the adjusting handle, and this adjusting handle is connected with deflector and realizes angular adjustment to guide plate.
Described rectification layer is positioned at a side of conduit enclosure and is made up of mutually orthogonal grid, thereby experimental gas is flowed vertically downward.
Totally 3 layers and be positioned at rectification layer below and from top to bottom be arranged in order of described crushing flaps with holes are provided with equally distributed hole on crushing flaps with holes.
Described simulation spray ammonia mouth array is positioned at the relative side of rectification layer of conduit enclosure, this simulation spray ammonia mouth array comprises: grid support and spray ammonia pipe, wherein: spray ammonia pipe vertically is fixed on the grid support and in the array structure mode to be arranged, and the length of totally 3 row and each row spray ammonia pipe is identical.
Described experimental channel air feed module comprises: belt driven type centrifugal fan, variable-frequency governor and damper, wherein: variable-frequency governor is connected with the belt driven type centrifugal fan by cable, damper is arranged at the output of belt driven type centrifugal fan, and the air outlet of belt driven type centrifugal fan is connected with the inlet of conduit enclosure.
Described search gas jet module comprises: gas cylinder, pressure-reducing valve, control valve, vortex-shedding meter, spinner flowmeter and injection grid, wherein: gas cylinder is connected with pressure-reducing valve and vortex-shedding meter after the bus-bar series connection successively, the output of vortex-shedding meter links to each other with several triple valves and is divided into several branch roads, be provided with control valve and spinner flowmeter on each branch road successively, the output of spinner flowmeter sprays grid with several respectively and is connected.
The utility model can be obtained the mixing and the distribution effect of better ammonia and nitrogen oxide, improves denitration efficiency, alleviates environmental pollution, can help to improve denitration efficiency, alleviates environmental pollution.
Description of drawings
Fig. 1 is the utility model exterior sheath conduit and internal structure and air feed module diagram.
Fig. 2 is the utility model simulation spray ammonia mouth array side view.
Fig. 3 is the utility model simulation spray ammonia mouth array front view.
Fig. 4 is the utility model search gas jet module schematic diagram.
Fig. 5 is the utility model crushing flaps with holes structural representation.
Fig. 6 is the utility model rectification layer structural representation.
Fig. 7 is the utility model deflector and regulates the grip structure schematic diagram.
The specific embodiment
Below embodiment of the present utility model is elaborated; present embodiment is being to implement under the prerequisite with technical solutions of the utility model; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, present embodiment comprises: conduit enclosure 1, deflector 2, rectification layer 3, crushing flaps 4 with holes, simulation spray ammonia mouth array 5, experimental channel air feed module 6 and search gas jet module 7, wherein:
Described conduit enclosure 1 is the transparent pipeline of II type structure, is provided with three bent angles 8 in II type structure, and whole pipe shell 1 is horizontal distribution.
Described deflector 2 is an arc-shaped structure, and the radian of its circular arc is 90 °, and the length of deflector 2 is identical with the width of conduit enclosure 1, and this deflector 2 specifically is positioned at bent angle 8 places of described conduit enclosure 1.
The outside of described conduit enclosure 1 is provided with regulates handle 9, this adjustings handle 9 angular adjustment of realization to guide plate that be connected with deflector 2.
Described rectification layer 3 is positioned at a side of conduit enclosure 1 and is made up of mutually orthogonal grid 10, thereby experimental gas is flowed vertically downward.
Totally 3 layers and to be positioned at that rectification layer 3 below from top to bottom are arranged in order be the 1st, 2,3 layers of described crushing flaps 4 with holes are provided with equally distributed hole 11 on crushing flaps with holes.
Described simulation spray ammonia mouth array 5 is positioned at rectification layer 3 a relative side of conduit enclosure 1, this simulation spray ammonia mouth array 5 comprises: grid support 12 and spray ammonia pipe 13, wherein: spray ammonia pipe 13 vertically is fixed on the grid support 12 and in the array structure mode to be arranged, and the length of totally 3 row and each row spray ammonia pipe 13 is identical.
Described experimental channel air feed module 6 comprises: belt driven type centrifugal fan 14, variable-frequency governor 15 and damper 16, wherein: variable-frequency governor 15 is connected with belt driven type centrifugal fan 14 by cable, damper 16 is arranged at the output of belt driven type centrifugal fan 14, and the air outlet of belt driven type centrifugal fan 14 is connected with the inlet of conduit enclosure 1.
Described search gas jet module 7 comprises: gas cylinder 17, pressure-reducing valve 18, control valve 19, vortex-shedding meter 20, spinner flowmeter 21 and injection grid 22, wherein: gas cylinder 17 is connected with pressure-reducing valve 18 and vortex-shedding meter 20 after the bus-bar series connection successively, the output of vortex-shedding meter 20 links to each other with several triple valves 23 and is divided into several branch roads, be provided with control valve 19 and spinner flowmeter 21 on each branch road successively, the output of spinner flowmeter 21 sprays grid 22 with several respectively and is connected.
In the experimental channel air feed module, the belt driven type centrifugal fan under variable-frequency governor control produces the experiment air-flow, and controls the size of air-flow to meet experimental conditions by the air door of adjusting ventilation blower.The outlet of experimental channel air feed module is connected to the air inlet of conduit enclosure.Control the flow of the search gas of simulation spray ammonia mouth array injection by the control valve of adjusting the search gas jet module, thereby mix mutually in certain proportion with the experiment air-flow, and by adjusting the number of 3 groups of deflectors, position and angle flow after making mist by deflector and finish layer vertically downward.Owing in the search gas jet module, increased control valve and flowmeter, and the structure adjusted of deflector, make experimental gas can guarantee the vertical flow direction and rational flow size, the result be experimental gas the 1st layer resistance plate above the VELOCITY DISTRIBUTION standard deviation be 12.31%, the CONCENTRATION DISTRIBUTION standard deviation is 4.72%, 25%, the concentration standard difference has reached technological requirement in 15% situation much smaller than original VELOCITY DISTRIBUTION standard deviation.
Claims (2)
1. a ∏ type that is used for denitrating flue gas is arranged cold mould experimental provision, comprising: conduit enclosure, deflector, rectification layer, crushing flaps with holes, simulation spray ammonia mouth array, experimental channel air feed module and search gas jet module, wherein:
Described deflector is an arc-shaped structure, and the radian of its circular arc is 90 °, and the length of deflector is identical with the width of conduit enclosure, and this deflector specifically is positioned at the corner of described conduit enclosure;
The outside of described conduit enclosure is provided with the adjusting handle, and this adjusting handle is connected with deflector and realizes angular adjustment to guide plate;
Described rectification layer is positioned at a side of conduit enclosure and is made up of mutually orthogonal grid, thereby experimental gas is flowed vertically downward;
Totally 3 layers and be positioned at rectification layer below and from top to bottom be arranged in order of described crushing flaps with holes are provided with equally distributed hole on crushing flaps with holes;
Described simulation spray ammonia mouth array is positioned at the relative side of rectification layer of conduit enclosure, this simulation spray ammonia mouth array comprises: grid support and spray ammonia pipe, wherein: spray ammonia pipe vertically is fixed on the grid support and in the array structure mode to be arranged, and the length of totally 3 row and each row spray ammonia pipe is identical;
Described experimental channel air feed module comprises: belt driven type centrifugal fan, variable-frequency governor and damper, wherein: variable-frequency governor is connected with the belt driven type centrifugal fan by cable, damper is arranged at the output of belt driven type centrifugal fan, and the air outlet of belt driven type centrifugal fan is connected with the inlet of conduit enclosure;
Described search gas jet module comprises: gas cylinder, pressure-reducing valve, control valve, vortex-shedding meter, spinner flowmeter and injection grid, wherein: gas cylinder is connected with pressure-reducing valve and vortex-shedding meter after the bus-bar series connection successively, the output of vortex-shedding meter links to each other with several triple valves and is divided into several branch roads, be provided with control valve and spinner flowmeter on each branch road successively, the output of spinner flowmeter sprays grid with several respectively and is connected.
2. the ∏ type that is used for denitrating flue gas according to claim 1 is arranged cold mould experimental provision, it is characterized in that, described conduit enclosure is the transparent pipeline of ∏ type structure, is provided with three bent angles in ∏ type structure, and the whole pipe shell is horizontal distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205515228U CN201906563U (en) | 2010-10-02 | 2010-10-02 | n-shaped cold model experiment device for flue gas denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205515228U CN201906563U (en) | 2010-10-02 | 2010-10-02 | n-shaped cold model experiment device for flue gas denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201906563U true CN201906563U (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205515228U Expired - Lifetime CN201906563U (en) | 2010-10-02 | 2010-10-02 | n-shaped cold model experiment device for flue gas denitration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN105498530A (en) * | 2015-12-08 | 2016-04-20 | 江苏方天电力技术有限公司 | Method for instructing ammonia spray adjustment through introducing tracer gases in SCR system simulation |
| CN108800175A (en) * | 2017-04-26 | 2018-11-13 | 南京空天机电设备有限公司 | A kind of large size flue Three-dimensional Flow homogenization method and device |
-
2010
- 2010-10-02 CN CN2010205515228U patent/CN201906563U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN104307359B (en) * | 2014-10-24 | 2017-09-08 | 上海交通大学 | Equipment for denitrifying flue gas and its flow guide bar design method for disperseing fly ash granule |
| CN105498530A (en) * | 2015-12-08 | 2016-04-20 | 江苏方天电力技术有限公司 | Method for instructing ammonia spray adjustment through introducing tracer gases in SCR system simulation |
| CN105498530B (en) * | 2015-12-08 | 2018-02-06 | 江苏方天电力技术有限公司 | The method that search gas instructs spray ammonia adjustment is introduced in SCR system simulation |
| CN108800175A (en) * | 2017-04-26 | 2018-11-13 | 南京空天机电设备有限公司 | A kind of large size flue Three-dimensional Flow homogenization method and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110727 |