CN206688520U - It is directly used in the ammonia and air mixing device of SCR reactions - Google Patents
It is directly used in the ammonia and air mixing device of SCR reactions Download PDFInfo
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- CN206688520U CN206688520U CN201720219033.4U CN201720219033U CN206688520U CN 206688520 U CN206688520 U CN 206688520U CN 201720219033 U CN201720219033 U CN 201720219033U CN 206688520 U CN206688520 U CN 206688520U
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- gas
- ammoniacal liquor
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- ammonia
- heat exchanger
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Abstract
The utility model proposes a kind of ammonia and air mixing device for being directly used in SCR reactions, it includes Benitration reactor, sets gas-gas heat exchanger in the inner bottom part of Benitration reactor, gas-gas heat exchanger is connected by dilution air with boiler primary air piping pipeline；Gas-gas heat exchanger is also connected by pipeline with ammoniacal liquor evaporator pipeline, and ammoniacal liquor evaporator is connected by pipeline with flue.The utility model uses hot blast of boiler with certain heat as dilution wind regime, 250 DEG C or so are again heated to by out of stock reactor afterbody high-temperature flue gas, dilution wind after heating enters ammoniacal liquor evaporator to gasify to ammoniacal liquor, become the ammonia and air gas mixture for being used directly for SCR reactions, the energy that whole ammoniacal liquor gasification needs additionally to supplement becomes very little, ammoniacal liquor is absolutely vaporized and is fully used, and plays energy-saving operational effect.
Description
Technical field
It the utility model is related to SCR denitration, and in particular to a kind of ammonia and air mixing device for being directly used in SCR reactions.
Background technology
SCR（Selective Catalytic Reduction）As SCR technology, developed in recent years
Comparatively fast.At present, ammonia catalytic reduction process method is using technologies most SCR, is in catalyst（Such as V2O5/TiO2 and V2O5-WO3/
TiO2）Under effect, reducing agent NH3By NO and NO at 290-400 DEG C2It is reduced into N2, and NH hardly occurs3Oxidation reaction,
So as to improve N2Selectivity, reduce NH3Consumption.
Past people think the mistaken ideas main to ammoniacal liquor SCR, because ammoniacal liquor contains the water of larger proportion, therefore are evaporating
During need to consume more energy.And application practice shows, the energy consumption of this process is less than similar urea ammonia mistake
Journey, even if being compared with liquefied ammonia also without very big difference.The calculating of material balance shows, as long as a certain proportion of hot blast temperature
250 DEG C, you can complete the evaporation process of ammonia spirit.Therefore, design one kind can reduce thermal energy loss, improve out of stock efficiency
Ammonia and air mixing device are come to be directly used in SCR reactions be the required of people.
Utility model content
Technical problem to be solved in the utility model is a kind of ammonia for being directly used in SCR reactions of design and air mixing
Device, the device use the out of stock technology of ammonia evaporator, can reduce the loss of thermal energy, improve out of stock efficiency.
In order to solve the above technical problems, technical solution adopted in the utility model is：One kind is directly used in SCR reactions
Ammonia and air mixing device, including Benitration reactor sets gas-gas heat exchanger, gas-gas changes in the inner bottom part of Benitration reactor
Hot device is connected by dilution air with boiler primary air piping pipeline；Gas-gas heat exchanger also passes through pipeline and ammoniacal liquor evaporator pipeline
Connection, ammoniacal liquor evaporator are connected by pipeline with flue.
For reactant without interruption, the ammoniacal liquor evaporator is also connected by measuring pump with ammoniacal liquor storage tank.
The utility model uses the ammonia and air mixing device that are directly used in SCR reactions designed by above-mentioned technical proposal,
Using hot blast of boiler with certain heat as dilution wind regime, heated again by out of stock reactor afterbody high-temperature flue gas
To 250 DEG C or so, the dilution wind after heating enters ammoniacal liquor evaporator to gasify to ammoniacal liquor, becomes and is used directly for
The ammonia and air gas mixture of SCR reactions.In addition to the ammonia atomization evaporator of key, one is cleverly designed the utility model
It is that its heating dilution wind is made using heat possessed by heat smoke by a small-sized gas-gas heat exchanger, it is a series of by this
Optimization design so that the energy that whole ammoniacal liquor gasification needs additionally to supplement becomes very little, and absolutely vaporization is simultaneously for ammoniacal liquor
It is fully used, plays energy-saving operational effect.
Brief description of the drawings
Fig. 1 represents that the utility model is directly used in the ammonia of SCR reactions and the structural representation of air mixing device.
Embodiment
The ammonia and air mixing device for being directly used in SCR reactions to the utility model below in conjunction with the accompanying drawings illustrate.
Referring to Fig. 1, the utility model is directly used in the ammonia and air mixing device of SCR reactions, including Benitration reactor 4,
Gas-gas heat exchanger 5, which is set, in the inner bottom part of Benitration reactor 4 carries out heat exchange.Heat exchanger heat transfer type is broadly divided into three kinds：
Heat transfer, convection current and radiation.Gas-gas heat exchanger is to belong to convective heat transfer mode, and heat passes from the higher part of thing body temperature
The process for being delivered to the relatively low part of temperature or being delivered to the relatively low another object of the temperature contacted is referred to as heat transfer, referred to as
Heat conduction.Gas of the present utility model-gas heat exchanger 5 is exactly that the high gas of temperature is delivered to the conventional Space Facilities low to temperature.
Gas-gas heat exchanger 5 is connected by dilution air 6 with boiler primary air piping by pipeline 7.Gas-gas heat exchanger 5 also passes through pipeline
8 are connected with the pipeline of ammoniacal liquor evaporator 1, and ammoniacal liquor evaporator 1 is connected by pipeline 2 with flue 3, and flue 3 is provided with cigarette
Gas inlet port.For reactant without interruption, the utility model needs to set single ammoniacal liquor storage tank, ammoniacal liquor storage tank and ammonia
The pipeline of water evaporimeter 1 is connected, and ammoniacal liquor is transported to ammoniacal liquor evaporator 1 by design flow pump on pipeline, to whole denitration rate
Control is realized by the Flow-rate adjustment of ammoniacal liquor.
Ammoniacal liquor evaporator of the present utility model uses conical head using the ammoniacal liquor evaporator used on the market, its end socket,
Gas distributor uses spiral-flow type structure, insulation material from the rock wool that thickness is 40mm, top tank structure use anti-corrosion surplus for
1mm。
Dilution air 6 delivers to hot blast of more than 120 DEG C boilers in the gas in Benitration reactor 4-gas heat exchanger 5, heat
Wind is further heated to more than 250 DEG C of the temperature of gasification ammonia spirit enough, and ammoniacal liquor evaporator 1 of then making a gift to someone promotes 20%-
30% ammonia spirit vaporization.By this flow, ammonia water and air, which is diluted to less than 5%, turns into mixed gas, is made
It is ejected into for SCR reactant by ammonia-spraying grid in the flue gas in flue 3, goes to complete SCR reactions.
Claims (2)
1. a kind of ammonia and air mixing device for being directly used in SCR reactions, including Benitration reactor, it is characterized in that anti-in denitration
The inner bottom part of device is answered to set gas-gas heat exchanger, gas-gas heat exchanger is connected by dilution air with boiler primary air piping pipeline；
Gas-gas heat exchanger is also connected by pipeline with ammoniacal liquor evaporator pipeline, and ammoniacal liquor evaporator is connected by pipeline with flue.
2. the ammonia and air mixing device according to claim 1 for being directly used in SCR reactions, it is characterized in that the ammoniacal liquor
Evaporator is also connected by measuring pump with ammoniacal liquor storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219033.4U CN206688520U (en) | 2017-03-08 | 2017-03-08 | It is directly used in the ammonia and air mixing device of SCR reactions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219033.4U CN206688520U (en) | 2017-03-08 | 2017-03-08 | It is directly used in the ammonia and air mixing device of SCR reactions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206688520U true CN206688520U (en) | 2017-12-01 |
Family
ID=60442374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720219033.4U Active CN206688520U (en) | 2017-03-08 | 2017-03-08 | It is directly used in the ammonia and air mixing device of SCR reactions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206688520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108452677A (en) * | 2018-05-16 | 2018-08-28 | 东方电气集团东方锅炉股份有限公司 | It is a kind of using ammonium hydroxide as the SCR denitration method for flue gas and device of denitrification reducing agent |
-
2017
- 2017-03-08 CN CN201720219033.4U patent/CN206688520U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108452677A (en) * | 2018-05-16 | 2018-08-28 | 东方电气集团东方锅炉股份有限公司 | It is a kind of using ammonium hydroxide as the SCR denitration method for flue gas and device of denitrification reducing agent |
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