CN205886604U - SCR denitration ammonia injection system with oval plate mixed flow ware - Google Patents
SCR denitration ammonia injection system with oval plate mixed flow ware Download PDFInfo
- Publication number
- CN205886604U CN205886604U CN201620715775.1U CN201620715775U CN205886604U CN 205886604 U CN205886604 U CN 205886604U CN 201620715775 U CN201620715775 U CN 201620715775U CN 205886604 U CN205886604 U CN 205886604U
- Authority
- CN
- China
- Prior art keywords
- flue
- vertical
- vertical smoke
- ammonia
- 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
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a SCR denitration ammonia injection system with oval plate mixed flow ware relates to a SCR denitration ammonia injection system. It includes level entry flue, SCR reactor, vertical exhaust pass, first rectifier, second rectifier, catalyst layer and heating pipe, vertical smoke inlet pipeline and level entry flue intercommunication, vertical tobacco pipe say with vertical exhaust pass intercommunication, install a shutter board on the level entry flue, install the gravitational dust collection device in the level entry flue, the back taper ash bucket is installed to level entry flue bottom, installing ammonia in the vertical smoke inlet pipeline and spraying grid and oval plate mixed flow ware, vertical tobacco pipe says that one side is equipped with the air intake, and the opposite side is equipped with the air outlet, vertical tobacco pipe is said and is installed the 2nd shutter board. The utility model discloses the volume of spouting ammonia of can not only effectively solving is unstable, mixes the insufficient problem of effect, but also enables the power plant at SCR flue gas denitration high efficiency, the reliability service of keeping in service.
Description
Technical field
The utility model is related to a kind of scr denitration ammonia spraying system, specifically a kind of with oval plate flow mixing device
Scr denitration ammonia spraying system.
Background technology
In fire coal/oil and gas power plant production process, a large amount of nox can be produced.Wherein no, no2 are toxic gas,
Natural environment and the mankind are damaged.Nox enters in air and can form acid rain, and nitric acid type acid rain endangers journey than sulfate type acid rain
Degree is higher.Some entrance stratosphere of nox in air, can damage to ozone layer.N2o in nox is also to draw simultaneously
Play one of factor of global warming although its quantity is few, but the ability of its greenhouse effects is 200 to 300 times of co2.
Therefore, domestic overwhelming majority fire coal/oil and gas power plant takes scr flue gas denitrification system to control the discharge of nox, to meet
The legal emission limit of country, thus realizing the effective control of nox discharge, is also the important process realizing national emission reduction tasks.
In scr flue gas denitrification system, the injection of reducing agent ammonia and mixing be whole system important component part.Existing
The injection of some ammonia and hybrid system often have that ammonia spraying amount is unstable, and the insufficient problem of mixed effect leads to denitration efficiency low,
The disadvantages such as the escaping of ammonia height.
Utility model content
The purpose of this utility model is the weak point in order to overcome background technology, and provides one kind to carry oval plate mixed flow
The scr denitration ammonia spraying system of device, can not only effectively solving ammonia spraying amount unstable, the insufficient problem of mixed effect, but also
Power plant can be made to keep efficient, reliability service in the operation of scr denitrating flue gas.
To achieve these goals, the technical solution of the utility model is: the scr denitration ammonia spray with oval plate flow mixing device
Penetrate system, including horizontal access flue, scr reactor and vertical exhaust pass, scr reactor vertically enters cigarette by be sequentially communicated
Pipeline, horizontal rectification pipeline and vertical smoke pipeline are constituted, and described vertical smoke-intake pipe road is connected with horizontal access flue, described perpendicular
Straight smoke pipeline connect with vertical exhaust pass it is characterised in that: on described horizontal access flue, first gear door-plate, water are installed
Gravitational dust collecting device is installed in flat gas approach, horizontal access stack base is provided with the back taper connecting with horizontal access flue
Shape ash bucket；Described vertical smoke-intake pipe Dao Neiyan flow of flue gas direction is sequentially installed with ammonia injection grid and oval plate flow mixing device, erects
Straight smoke pipeline is provided with the first rectifier with the junction of horizontal rectification pipeline, pacifies successively from top to bottom inside vertical smoke pipeline
Equipped with the second rectifier, catalyst layer and heating tube, described vertical smoke pipeline side is provided with the air intake with air intake motor connection
Mouthful, opposite side is provided with the air outlet with air-out motor connection；On described vertical smoke pipeline, second gear door-plate is installed.
In technique scheme, described second rectifier is located at the gas approach of vertical smoke pipeline, described catalysis
Oxidant layer has three layers and is in arranged for interval, and described heating tube has multiple and is in be arranged in parallel each other, and multiple heating tubes are passed through to prop up
Fagging is arranged in vertical smoke-intake pipe road.
In technique scheme, described back taper ash bucket is provided with rapping-off-ash device.
In practical work process, the effect of critical piece of the present utility model is as follows: (1) supplies ammonia pipeline, is mainly used in defeated
Send the mixed gas of ammonia and in the air；(2) ammonia injection grid, distributes as net shape in scr denitration reactor inlet flue
Section, the mixed gas equal proportion of ammonia and air is distributed to flue cross section regional；(3) nozzle, is distributed in ammonia injection
On grid, strengthen the mixing of ammonia flue gas and ammonia when entering in scr reactor inlet flue；(4) oval plate flow mixing device, position
In scr denitration reactor inlet flue, it is in, along flow of flue gas direction, the downstream that ammonia sprays grid, change scr gas approach
The flow regime of middle flue gas is so as to change into turbulent flow from laminar flow；(5) fixed rectifier, positioned at scr denitration reactor inlet cigarette
In road and at reactor inlet, it is in the downstream of disk flow mixing device along flow of flue gas direction, for changing in scr gas approach
The flow regime of flue gas is so as to change into laminar flow from turbulent flow.
Compared with prior art, its advantage is as follows for the utility model:
1st, improve the mixed effect of denitrification reducing agent ammonia；
2nd, the ammonia spraying amount simplifying denitrating system is adjusted；
3rd, effectively improve the denitration efficiency of denitrating system；
4th, effective control the escaping of ammonia rate, it is to avoid secondary pollution.
Brief description
Fig. 1 is structural representation of the present utility model.
In figure 1- horizontal access flue, 2-scr reactor, 21- vertical smoke-intake pipe road, 22- horizontal rectification pipeline, 23- erects
Straight smoke pipeline, the vertical exhaust pass of 3-, 41- first gear door-plate, 42- second gear door-plate, 43- gravitational dust collecting device, 44- back taper
Shape ash bucket, 45- rapping-off-ash device, 50- air outlet, 51- ammonia injection grid, 52- oval plate flow mixing device, 53- first rectifier,
54- second rectifier, 55- catalyst layer, 56- heating tube, 57- enters wind turbine, 58- air inlet, and 59- goes out wind turbine, and 6- supports
Plate.
Specific embodiment
Describe performance of the present utility model below in conjunction with the accompanying drawings in detail, but they are not constituted to of the present utility model
Limit, only for example.Make advantage of the present utility model more clear and easy to understand by explanation simultaneously.
Refering to accompanying drawing understand: the scr denitration ammonia spraying system with oval plate flow mixing device, including horizontal access flue 1,
Scr reactor 2 and vertical exhaust pass 3, scr reactor 2 is by the vertical smoke-intake pipe road 21 being sequentially communicated, horizontal rectification pipeline 22
Constitute with vertical smoke pipeline 23, described vertical smoke-intake pipe road 21 is connected with horizontal access flue 1, described vertical smoke pipeline 23
Connect with vertical exhaust pass 3 it is characterised in that: on described horizontal access flue 1, first gear door-plate 41, horizontal access are installed
Gravitational dust collecting device 43 is installed in flue 1, horizontal access flue 1 bottom is provided with the back taper connecting with horizontal access flue 1
Shape ash bucket 44；Prolong flow of flue gas direction in described vertical smoke-intake pipe road 21 and be sequentially installed with ammonia injection grid 51 and oval plate mixed flow
Device 52, vertical smoke-intake pipe road 21 is provided with the first rectifier 53, in vertical smoke pipeline 23 with the junction of horizontal rectification pipeline 22
Portion is sequentially installed with the second rectifier 54, catalyst layer 55 and heating tube 56, described vertical smoke pipeline 23 side from top to bottom
It is provided with and enters the air inlet 58 that wind turbine 57 is connected, opposite side is provided with and goes out the air outlet 50 that wind turbine 59 is connected；Described vertical
Second gear door-plate 42 is provided with smoke pipeline 23.
Preferably, described second rectifier 54 is located at the gas approach of vertical smoke pipeline 23, described catalyst layer 55
There are three layers and in arranged for interval, described heating tube 56 has multiple and is in be arranged in parallel each other, and multiple heating tubes 56 are passed through to prop up
Fagging 6 is arranged in vertical smoke-intake pipe road 21.Preferably, described back taper ash bucket 44 is provided with rapping-off-ash device 45.
The utility model enables the efficient uniform mixing of ammonia injection in scr denitrating system, and can make vertical exhaust pass 3
The nox concentration at place and amount of ammonia slip, in the nox concentration of horizontal access flue 1, ammonia escape amount, flue-gas temperature, unit load etc.
It is ensured that stablizing controlled when related quantity of state changes.
Because flue of the present utility model is longer vertical gas pass, flow field in flue for the flue gas levels off to laminar flow shape
State, the flue gas flow direction in this state lower flue is more regular, and adjacent fluid interlayer material does not exchange substantially, is unfavorable for that ammonia is empty mixed
Conjunction gas is sufficiently mixed with flue gas.Existing spray ammonia system need to carry out difference according to flue flow field condition to zones of different
Change and supply ammonia, this can meet the needs of scr denitration in theory for ammonia mode.But because actual operating mode is complex, boiler
Operation affected by multiple condition such as coal, load.
Therefore actual operating mode often off-design operating mode, carries out supplying ammonia according to design in this case,
Will result in and be difficult to match with actual conditions for ammonia amount, lead to denitration efficiency to decline, the harmful effect such as the escaping of ammonia rising.Setting
After oval plate flow mixing device, the laminar condition in scr denitration reactor inlet flue can be destroyed, form the violent turbulent flow of disturbance, this
Make being sufficiently mixed of ammonia sky mixed gas and flue gas, thus ensure scr denitration reaction efficiently and stably.In control aspect,
Also only need nox content according to contained by inlet flue gas to be adjusted for ammonia amount, uniformly ammonia is supplied to each region of flue cross section, simplifies control
Means processed, thus improve the stability of system.
Other unaccounted parts belong to prior art.
Claims (3)
1. carry oval plate flow mixing device scr denitration ammonia spraying system, including horizontal access flue (1), scr reactor (2) and
Vertically exhaust pass (3), scr reactor (2) by the vertical smoke-intake pipe road (21) being sequentially communicated, horizontal rectification pipeline (22) and erects
Straight smoke pipeline (23) is constituted, and described vertical smoke-intake pipe road (21) is connected with horizontal access flue (1), described vertical smoke pipeline
(23) connect with vertical exhaust pass (3) it is characterised in that:
First gear door-plate (41) is provided with described horizontal access flue (1), horizontal access flue is provided with gravitational dust collection in (1)
Device (43), horizontal access flue (1) bottom is provided with the back taper ash bucket (44) connecting with horizontal access flue (1)；
Prolong flow of flue gas direction in described vertical smoke-intake pipe road (21) and be sequentially installed with ammonia injection grid (51) and oval plate mixed flow
Device (52), ammonia injection grid (51) is provided with nozzle, the junction of vertical smoke-intake pipe road (21) and horizontal rectification pipeline (22)
It is provided with the first rectifier (53), inside vertical smoke pipeline (23), be sequentially installed with the second rectifier (54), catalysis from top to bottom
Oxidant layer (55) and heating tube (56), described vertical smoke pipeline (23) side is provided with and enters the air inlet that wind turbine (57) is connected
(58), opposite side is provided with and goes out the air outlet (50) that wind turbine (59) is connected；
On described vertical smoke pipeline (23), second gear door-plate (42) is installed.
2. the scr denitration ammonia spraying system with oval plate flow mixing device according to claim 1 it is characterised in that: described
Second rectifier (54) is located at the gas approach of vertical smoke pipeline (23), and described catalyst layer (55) has three layers and in interval
Arrangement, described heating tube (56) has multiple and is in be arranged in parallel each other, and multiple heating tubes (56) are passed through gripper shoe (6) and installed
In vertical smoke-intake pipe road (21).
3. the scr denitration ammonia spraying system with oval plate flow mixing device according to claim 1 and 2 it is characterised in that: institute
State and rapping-off-ash device (45) is provided with back taper ash bucket (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715775.1U CN205886604U (en) | 2016-07-08 | 2016-07-08 | SCR denitration ammonia injection system with oval plate mixed flow ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715775.1U CN205886604U (en) | 2016-07-08 | 2016-07-08 | SCR denitration ammonia injection system with oval plate mixed flow ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205886604U true CN205886604U (en) | 2017-01-18 |
Family
ID=57770736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620715775.1U Active CN205886604U (en) | 2016-07-08 | 2016-07-08 | SCR denitration ammonia injection system with oval plate mixed flow ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205886604U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704476A (en) * | 2018-06-12 | 2018-10-26 | 彭圆 | A kind of thermal power plant SCR method flue-gas denitration process |
| CN108704475A (en) * | 2018-06-12 | 2018-10-26 | 彭圆 | A kind of thermoelectricity station-service SCR denitration device |
| CN113028434A (en) * | 2021-03-08 | 2021-06-25 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Coal fired boiler flying dust discrete denitration flue |
-
2016
- 2016-07-08 CN CN201620715775.1U patent/CN205886604U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704476A (en) * | 2018-06-12 | 2018-10-26 | 彭圆 | A kind of thermal power plant SCR method flue-gas denitration process |
| CN108704475A (en) * | 2018-06-12 | 2018-10-26 | 彭圆 | A kind of thermoelectricity station-service SCR denitration device |
| CN108704476B (en) * | 2018-06-12 | 2021-01-19 | 山东煦国能源有限责任公司 | SCR (Selective catalytic reduction) flue gas denitration process for thermal power plant |
| CN113028434A (en) * | 2021-03-08 | 2021-06-25 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Coal fired boiler flying dust discrete denitration flue |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102626585B (en) | V-type ammonia spraying and mixing system for SCR (Selective Catalytic Reduction) smoke denitrification device | |
| CN204543996U (en) | Coal-fired plant flue gas multi-pollutant deep purifying controls coupled system | |
| CN104190253A (en) | Coke oven flue gas SCR denitration system | |
| CN204073849U (en) | Coke oven flue gas SCR denitration system | |
| CN109731451A (en) | A cement kiln flue gas SDS dry desulfurization and low-dust SCR denitration purification device and process | |
| CN102179171A (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN102512953A (en) | CFB boiler SCR denitration technology and denitration device | |
| CN217613822U (en) | A carbon dioxide absorption system | |
| CN205886604U (en) | SCR denitration ammonia injection system with oval plate mixed flow ware | |
| CN205886603U (en) | Rectification mixed -flow SCR denitration ammonia injection system | |
| CN106139868A (en) | A kind of remove the system of sulfur trioxide in flue gas in power station boiler | |
| CN113522012B (en) | Flue gas denitration ammonia spraying mixing system, static mixer thereof and ammonia spraying control method | |
| CN202860407U (en) | Full mixing-type ammonia spraying component | |
| CN204247065U (en) | Single tower Two-way Cycle wet flue gas desulfurization tower cascade type liquid collector | |
| CN205965481U (en) | System for sulfur trioxide among desorption power plant boiler flue gas | |
| CN203777911U (en) | Desulfuration, dedusting and denitration integrated flue gas cleaner | |
| CN209564842U (en) | A kind of collaboration of sintering flue gas SCR denitration takes off white device | |
| CN203916431U (en) | A kind of gaseous oxidation is in conjunction with the flue gas combined desulfurization and denitration device of wet absorption | |
| CN104941446A (en) | Ammonia spraying grating anti-blocking device for SCR denitration system | |
| CN203916465U (en) | A kind of equipment for denitrifying flue gas | |
| CN206823549U (en) | Environment-friendly and energy-efficient CFBB combined denitration system | |
| CN202962241U (en) | Device for synergistically removing flue gas mercury | |
| CN106178946A (en) | Method for realizing integral embedded type smelting flue gas denitration system | |
| CN211936312U (en) | Blast furnace hot blast stove waste gas desulfurization denitration system | |
| CN204261561U (en) | Coal steam-electric plant smoke SCR denitration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |