CN206229206U - The SCR denitration device of boiler smoke - Google Patents
The SCR denitration device of boiler smoke Download PDFInfo
- Publication number
- CN206229206U CN206229206U CN201621304739.2U CN201621304739U CN206229206U CN 206229206 U CN206229206 U CN 206229206U CN 201621304739 U CN201621304739 U CN 201621304739U CN 206229206 U CN206229206 U CN 206229206U
- Authority
- CN
- China
- Prior art keywords
- scr denitration
- economizer
- smoke
- gas
- scr
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses the SCR denitration device of boiler smoke, including exhaust gases passes and SCR denitration reactor, high-temperature economizer, high temperature air preheater, SCR denitration area and low temperature air preheater are sequentially installed with from top to bottom in the exhaust gases passes, and the SCR denitration area is provided with pipe and smoke-intake pipe；The upper end of the SCR denitration reactor connects the pipe, SCR denitration is set in the SCR denitration reactor, the SCR denitration reactor lower end is provided with low-level (stack-gas) economizer, the low-level (stack-gas) economizer lower end is provided with ash bucket, and the side wall of the ash bucket is offered outlet flue and is connected with the smoke-intake pipe by the outlet flue.The SCR denitration device of boiler smoke of the present utility model will move to the design after SCR desulfurization reactors outside low-level (stack-gas) economizer, the SCR denitration for being completed boiler is transformed, and is obtained denitration flue gas and is discharged again.
Description
Technical field
The utility model is related to the SCR denitration device of boiler smoke.
Background technology
Selective catalytic reduction (Selective Catalytic Reduction, SCR) is industrial most widely used
A kind of gas denitrifying technology, can be applied to the NOx emission control of the combustion apparatus such as station boiler, Industrial Stoves and waste incineration,
Ideally, the removal efficiency of NOx can be made up to more than 90%, is the technology of the best stationary source NOx improvement that can be found at present.
SCR denitration course of reaction：SCR denitration system is to spray into ammonia in flue gas to catalyst upstream or other are suitable
Reducing agent, using catalyst by the NOx conversion in flue gas be nitrogen and water.In the typical design, using liquid anhydrous ammonia or
Ammoniacal liquor, and diluent air mixing, in being sprayed into the flue gas of SCR reactors upstream using ammonia-spraying grid.
At 300 DEG C -420 DEG C, NH3 is reacted flue-gas temperature in reactor with NOx, and NO is gone back by following reaction
It is former：
4NO+4NH3+O2 → 4N2+6H2O (main reaction)
6NO+4NH3 → 5N2+6H2O (side reaction)
In flue gas, the reaction that 5%, the NO2 that NO2 typically accounts for total NOx concentration is participated in is as follows：
6NO2+8NH3 → 7N2+12H2O (main reaction)
2NO2+4NH3+O2 → 3N2+6H2O (side reaction)
Reaction above shows that reduction NO2 needs more ammonia than reduction NO, and in most of flue gas, NO2 only accounts for NOx
The sub-fraction of total amount, therefore the influence of NO2 is not notable.In selective catalysis reducing process, NOx and NH3 is in catalyst
Effect is lower to produce reduction reaction.Catalyst is placed in a fixed reactor, and flue gas is urged through parallel the flowing through of reactor
Agent surface.Catalyst elements are generally arranged vertically, and flue gas from up to down flows.General storage system, the ammonia by ammonia of SCR system
The composition such as system, reactor assembly, flue gas system, detecting and controlling system is sprayed into air mixing systems, ammonia.Due to catalyst
Very high to temperature requirement, SCR denitration reactor is typically located between economizer and air preheater, but built unit does not all have typically
There is reserved reactor to import and export flue space, it is difficult to be carried out at the SCR desulfurization of flue gas using SCR denitration method being completed on unit
Reason.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of SCR denitration device of boiler smoke, in original
Have on boiler controller system and transformed, SCR denitration is carried out to meet SCR denitration condition, obtaining can in line flue gas.
The SCR denitration device of boiler smoke of the present utility model, including exhaust gases passes and SCR denitration reactor, the cigarette
High-temperature economizer, high temperature air preheater, SCR denitration area and low temperature air preheater, the SCR are sequentially installed with from top to bottom in gas passage
Denitration region is provided with pipe and smoke-intake pipe；The upper end of the SCR denitration reactor connects the pipe, the SCR denitration
SCR denitration is set in reactor, the SCR denitration reactor lower end is provided with low-level (stack-gas) economizer, the low-level (stack-gas) economizer
Lower end is provided with ash bucket, and the side wall of the ash bucket is offered outlet flue and is connected with the smoke-intake pipe by the outlet flue.
Because the reaction temperature of catalytic denitration is between 300 DEG C -420 DEG C, because the boiler controller system being completed is not reserved
The position of SCR denitration reactor, therefore need the suitable location in exhaust gases passes to connect and draw smoke pipe by after SCR denitration reactor reaction
Discharge again.Shown according to temperature-measuring results, in original position temperature for placing low-level (stack-gas) economizer just in 300 DEG C of -420 DEG C of scopes,
Therefore the position of low-level (stack-gas) economizer is replaced with into SCR denitration reactor connection inlet/outlet pipe, then low-level (stack-gas) economizer is arranged on SCR denitration
After reactor, exhaust gases passes are flowed back to through ash flue bucket again by the flue gas of low-level (stack-gas) economizer, lowered the temperature by follow-up low temperature air preheater
Emit again.
Further, the SCR denitration area is provided with temperature inductor.
Further, it is coated with heat-insulation layer outside the pipe and smoke-intake pipe.
The SCR denitration device of boiler smoke of the present utility model will move to SCR desulfurization reactors outside low-level (stack-gas) economizer after
Design, the SCR denitration for being completed boiler is transformed, and is obtained denitration flue gas and is discharged again.
Brief description of the drawings
Fig. 1 is the structural representation of the SCR denitration device of the utility model boiler smoke.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
As shown in Figure 1, the SCR denitration device of the boiler smoke of the present embodiment, including exhaust gases passes 1 and SCR denitration are reacted
High-temperature economizer 3, high temperature air preheater 4, SCR denitration area 5 and low temperature are sequentially installed with device 2, exhaust gases passes 1 from top to bottom empty pre-
Device 6, SCR denitration area 5 is provided with the pipe 7 and smoke-intake pipe 8 for being coated with heat-insulation layer, and SCR denitration area 5 is provided with temperature inductor
9；The upper end connection pipe 7 of SCR denitration reactor 2, SCR denitration 10 is set in SCR denitration reactor 2, and SCR denitration is anti-
Answer the lower end of device 2 that low-level (stack-gas) economizer 11 is installed, the lower end of low-level (stack-gas) economizer 11 is provided with ash bucket 12, and the side wall of ash bucket 12 is offered out
Mouth 13 is simultaneously connected by outlet flue 13 with smoke-intake pipe 8.
The SCR denitration device of the boiler smoke of the present embodiment will move to setting after SCR desulfurization reactors outside low-level (stack-gas) economizer
Meter, the SCR denitration for being completed boiler is transformed, and is obtained denitration flue gas and is discharged again.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined
May be appreciated other embodiment.
Claims (3)
1. the SCR denitration device of boiler smoke, it is characterised in that：Including exhaust gases passes and SCR denitration reactor, the flue gas leads to
High-temperature economizer, high temperature air preheater, SCR denitration area and low temperature air preheater, the SCR denitration are sequentially installed with road from top to bottom
Area is provided with pipe and smoke-intake pipe；The upper end of the SCR denitration reactor connects the pipe, the SCR denitration reaction
SCR denitration is set in device, the SCR denitration reactor lower end is provided with low-level (stack-gas) economizer, the low-level (stack-gas) economizer lower end
Ash bucket is installed, the side wall of the ash bucket is offered outlet flue and is connected with the smoke-intake pipe by the outlet flue.
2. the SCR denitration device of boiler smoke according to claim 1, it is characterised in that：The SCR denitration area is provided with
Temperature inductor.
3. the SCR denitration device of boiler smoke according to claim 1, it is characterised in that：The pipe and smoke-intake pipe
It is coated with heat-insulation layer outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621304739.2U CN206229206U (en) | 2016-11-27 | 2016-11-27 | The SCR denitration device of boiler smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621304739.2U CN206229206U (en) | 2016-11-27 | 2016-11-27 | The SCR denitration device of boiler smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206229206U true CN206229206U (en) | 2017-06-09 |
Family
ID=58981217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621304739.2U Active CN206229206U (en) | 2016-11-27 | 2016-11-27 | The SCR denitration device of boiler smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206229206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869726A (en) * | 2017-09-30 | 2018-04-03 | 大唐东北电力试验研究所有限公司 | Thermal generation unit denitrating flue gas remodeling method |
-
2016
- 2016-11-27 CN CN201621304739.2U patent/CN206229206U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869726A (en) * | 2017-09-30 | 2018-04-03 | 大唐东北电力试验研究所有限公司 | Thermal generation unit denitrating flue gas remodeling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104190253A (en) | Coke oven flue gas SCR denitration system | |
| CN207680368U (en) | A kind of equipment for denitrifying flue gas based on temperature-compensating | |
| CN103638805B (en) | A kind of CFB boiler SNCR denitration method for flue gas of dual reducting agents | |
| CN104415660B (en) | A kind of equipment for denitrifying flue gas of CO waste heat boilers | |
| CN104324611A (en) | Flue gas SCR denitration system of thermal power plant | |
| CN102728217A (en) | Method and system for jointly desulfuration, denitration and demercuration by activated coke of moving bed | |
| CN106237851A (en) | A kind of utilize ozone to carry out SCR denitration to carry the System and method for of effect | |
| CN102806003A (en) | SNCR (selective non-catalytic reduction) denitration device and method for rotary cement kiln | |
| CN106215672A (en) | A kind of modified model SNCR SCR combined denitration device | |
| CN205386412U (en) | Boiler flue gas denitration system | |
| CN206229206U (en) | The SCR denitration device of boiler smoke | |
| CN205886603U (en) | Rectification mixed -flow SCR denitration ammonia injection system | |
| CN205886604U (en) | SCR denitration ammonia injection system with oval plate mixed flow ware | |
| CN106178946A (en) | Method for realizing integral embedded type smelting flue gas denitration system | |
| CN204996327U (en) | SNCR -SCR unites deNOx systems based on ammonia nitrogen mol ratio detects and regulation and control | |
| CN204637957U (en) | A kind of equipment for denitrifying flue gas | |
| CN204865545U (en) | Ammonia control system is spouted in denitration | |
| CN203525562U (en) | Selective non-catalytic reduction (SNCR) denitration device | |
| CN104386708B (en) | A kind of urea hydrolysis ammonia producing system being applied to thermal power plant's denitration and technique | |
| CN204261561U (en) | Coal steam-electric plant smoke SCR denitration system | |
| CN106955592A (en) | The urea pyrolysis ammonia structures and methods of SCR denitration system sulfur dioxide/sulphur trioxide conversion rate can be reduced | |
| CN205613280U (en) | A device that is used for muddy thermal technology of denitration to plant | |
| CN211069654U (en) | Two-stage ammonia injection combined denitration system | |
| CN107051191A (en) | The efficient SCR denitration structures and methods that a kind of achievable full load puts into operation | |
| CN208720184U (en) | A kind of waste heat boiler of nitrogen oxides minimum discharge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |