CN109876659A - A kind of low-temperature smoke air SCR denitrating system and its working method - Google Patents
A kind of low-temperature smoke air SCR denitrating system and its working method Download PDFInfo
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- CN109876659A CN109876659A CN201910294267.9A CN201910294267A CN109876659A CN 109876659 A CN109876659 A CN 109876659A CN 201910294267 A CN201910294267 A CN 201910294267A CN 109876659 A CN109876659 A CN 109876659A
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Abstract
The invention discloses a kind of low-temperature smoke air SCR denitrating system and its working methods, the outlet of blower is divided into two-way, wherein it is connected all the way through secondary air flow regulating device with the burner on combustion chamber, another way is connected through tuning wind flow regulator with the tuning wind nozzle in combustion chamber, the outlet of combustion chamber is connected through high-temperature flue gas output channel with the high-temperature flue gas injection apparatus in SCR inlet flue, inflammable gas pipeline is connected with the burner on combustion chamber, fuel gas flow regulator is provided on inflammable gas pipeline, the high-temperature flue gas temperature measuring equipment for going out flue-gas temperature in pipeline for detecting high-temperature flue gas speed is provided on high-temperature flue gas output channel, mixed flue gas temperature measuring equipment is provided at SCR inlet flue upper outlet, the outlet of SCR inlet flue is connected with SCR reactor, low temperature cigarette Feed channel is connected with the entrance of SCR inlet flue, and the system and its working method can be realized the SCR denitration processing to low-temperature flue gas.
Description
Technical field
The invention belongs to gas denitrifying technology field, it is related to a kind of low-temperature smoke air SCR denitrating system and its working method.
Background technique
With vigorously implementing for national energy conservation and emission reduction policy, flue gas pollutant emission reduction policy and technology start by power industry
Extend to the industries such as hot-water boiler, metallurgy, glass kiln, but Thermal Power Generation Industry SCR denitration technology in popularization due to flue-gas temperature
It is low and be restricted, it is therefore desirable to develop a kind of system, which can be realized the SCR denitration processing to low-temperature flue gas.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of low-temperature smoke air SCR denitrating system is provided
And its working method, the system and its working method can be realized the SCR denitration processing to low-temperature flue gas.
In order to achieve the above objectives, low-temperature smoke air SCR denitrating system of the present invention includes blower, secondary air flow adjusting
It is device, combustion chamber, tuning wind flow regulator, low-temperature flue gas pipeline, high-temperature flue gas output channel, SCR inlet flue, flammable
Gas pipeline and controller；
The outlet of blower is divided into two-way, wherein all the way through secondary air flow regulating device and the burner phase on combustion chamber
Connection, another way are connected through tuning wind flow regulator with the tuning wind nozzle in combustion chamber, and the outlet of combustion chamber is through height
Warm flue gas exit pipe road is connected with the high-temperature flue gas injection apparatus in SCR inlet flue, on inflammable gas pipeline and combustion chamber
Burner be connected, fuel gas flow regulator is provided on inflammable gas pipeline, on high-temperature flue gas output channel
It is provided with the high-temperature flue gas temperature measuring equipment for going out flue-gas temperature in pipeline for detecting high-temperature flue gas speed, SCR inlet flue upper outlet
Place is provided with mixed flue gas temperature measuring equipment, and the outlet of SCR inlet flue is connected with SCR reactor, low-temperature flue gas pipeline and SCR
The entrance of gas approach is connected, wherein controller and mixed flue gas temperature measuring equipment, high-temperature flue gas temperature measuring equipment, fuel gas
Flow regulator, secondary air flow regulating device and tuning wind flow regulator are connected.
High-temperature flue gas current equalizer is provided in combustion chamber, wherein tuning wind nozzle and high-temperature flue gas current equalizer are along flue gas stream
Logical direction is sequentially distributed.
Mixed flue gas current equalizer is provided in SCR inlet flue, wherein high-temperature flue gas injection apparatus and mixed flue gas flow
Device is sequentially distributed along the direction that flue gas circulates.
Thermal insulation layer is provided on the inner wall of SCR inlet flue, wherein mixed flue gas current equalizer and high-temperature flue gas injection apparatus
Face thermal insulation layer.
Nozzle on high-temperature flue gas injection apparatus is uniformly distributed.
The working method of low-temperature smoke air SCR denitrating system of the present invention the following steps are included:
Air is divided into two-way after blower is pressurized, wherein enters burning dress through secondary air flow regulating device all the way
In setting, another way is sprayed into combustion chamber after tuning wind flow regulator and tuning wind nozzle as tuning wind, fuel gas
It enters in burner and burns through fuel gas flow regulator, to generate high-temperature flue gas, the high-temperature flue gas warp
The tuning wind that tuning wind nozzle sprays adjusts temperature, to form the high-temperature flue gas after temperature adjustment, then through high-temperature flue gas injection apparatus
It sprays into SCR inlet flue, the low-temperature flue gas of low-temperature flue gas pipeline output enters in SCR inlet flue, and and high-temperature flue gas
The high-temperature flue gas that injection apparatus ejects is mixed, to form mixed flue gas, then into carrying out SCR in SCR reactor
Denitration process；
Controller is led to simultaneously by the flue-gas temperature in high-temperature flue gas temperature measuring equipment real-time detection high-temperature flue gas output channel
The temperature of mixed flue gas at mixed flue gas temperature measuring equipment real-time detection SCR inlet flue outlet is crossed, it is then defeated according to high-temperature flue gas
Out the temperature control fuel gas flow regulator of mixed flue gas at the flue-gas temperature in pipeline and SCR inlet flue outlet,
Secondary air flow regulating device and tuning wind flow regulator, so that the temperature of mixed flue gas is at SCR inlet flue outlet
360 DEG C -380 DEG C, to adapt to SCR reactor.
The invention has the following advantages:
Low-temperature smoke air SCR denitrating system of the present invention and its working method pass through fuel gas when specific operation
It burns, to generate high-temperature flue gas, while being mixed by tempering air with high-temperature flue gas, to adjust in a combustion chamber with air
The temperature of high-temperature flue gas, then high-temperature flue gas is mixed with low-temperature flue gas, it then enters back into and carries out SCR in SCR reactor
Denitration process, in addition, it is necessary to explanation, at work, controller is according to the flue gas in high-temperature flue gas output channel by the present invention
Temperature control fuel gas flow regulator, the secondary air flow of mixed flue gas are adjusted at temperature and SCR inlet flue outlet
Device and tuning wind flow regulator, so that the temperature of mixed flue gas is 360 DEG C -380 DEG C at SCR inlet flue outlet, with
Meeting the denitration requirement of SCR reactor, then realizes the SCR denitration processing of low-temperature flue gas, structure is simple, and it is easy to operate, it is whole
Without manpower intervention, human cost is saved.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 it is fuel gas flow regulator, 2 be blower, 3 be secondary air flow regulating device, 4 is tuning wind
Flow regulator, 5 be burner, 6 be combustion chamber, 7 be tuning wind nozzle, 8 be high-temperature flue gas current equalizer, 9 be high temperature cigarette
Gas spraying device, 10 be mixed flue gas current equalizer, 11 be thermal insulation layer, 12 be high-temperature flue gas temperature measuring equipment, 13 be mixed flue gas survey
Warm device, 14 be controller, 15 be SCR reactor, 16 be SCR inlet flue.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, low-temperature smoke air SCR denitrating system of the present invention include blower 2, secondary air flow regulating device 3,
It is combustion chamber 6, tuning wind flow regulator 4, low-temperature flue gas pipeline, high-temperature flue gas output channel, SCR inlet flue 16, flammable
Gas pipeline and controller 14；The outlet of blower 2 is divided into two-way, wherein all the way through secondary air flow regulating device 3 and combustion chamber 6
On burner 5 be connected, another way is connected through tuning wind flow regulator 4 with the tuning wind nozzle 7 in combustion chamber 6
Logical, the outlet of combustion chamber 6 is connected through high-temperature flue gas output channel with the high-temperature flue gas injection apparatus 9 in SCR inlet flue 16,
Inflammable gas pipeline is connected with the burner 5 on combustion chamber 6, and the adjusting of fuel gas flow is provided on inflammable gas pipeline
Device 1 is provided on high-temperature flue gas output channel to go out the high-temperature flue gas of flue-gas temperature in pipeline for detecting high-temperature flue gas speed and survey
Warm device 12, is provided with mixed flue gas temperature measuring equipment 13 at 16 upper outlet of SCR inlet flue, the outlet of SCR inlet flue 16 with
SCR reactor 15 is connected, and low-temperature flue gas pipeline is connected with the entrance of SCR inlet flue 16, wherein controller 14 with mix
Flue gas temperature measuring equipment 13, high-temperature flue gas temperature measuring equipment 12, fuel gas flow regulator 1, secondary air flow regulating device 3 and
Tuning wind flow regulator 4 is connected.
High-temperature flue gas current equalizer 8 is provided in combustion chamber 6, wherein tuning wind nozzle 7 and high-temperature flue gas current equalizer 8 are along cigarette
The logical direction of air-flow is sequentially distributed；Mixed flue gas current equalizer 10 is provided in SCR inlet flue 16, wherein high-temperature flue gas injection
Device 9 and mixed flue gas current equalizer 10 are sequentially distributed along the direction that flue gas circulates.
Thermal insulation layer 11 is provided on the inner wall of SCR inlet flue 16, wherein mixed flue gas current equalizer 10 and high-temperature flue gas spray
9 face thermal insulation layer 11 of injection device；Nozzle on high-temperature flue gas injection apparatus 9 is uniformly distributed.
The working method of low-temperature smoke air SCR denitrating system of the present invention the following steps are included:
Air is divided into two-way after the pressurization of blower 2, wherein enters burning through secondary air flow regulating device 3 all the way
In device 5, another way is sprayed into combustion chamber 6 after tuning wind flow regulator 4 and tuning wind nozzle 7 as tuning wind, can
Combustion gas body enters in burner 5 through fuel gas flow regulator 1 to burn, to generate high-temperature flue gas, the height
The tuning wind that warm flue gas is sprayed through tuning wind nozzle 7 adjusts temperature, to form the high-temperature flue gas after temperature adjustment, then through high-temperature flue gas
Injection apparatus 9 sprays into SCR inlet flue 16, and the low-temperature flue gas of low-temperature flue gas pipeline output enters in SCR inlet flue 16,
And the high-temperature flue gas ejected with high-temperature flue gas injection apparatus 9 is mixed, it is anti-then into SCR to form mixed flue gas
Answer progress SCR denitration processing in device 15；
Controller 14 is by the flue-gas temperature in 12 real-time detection high-temperature flue gas output channel of high-temperature flue gas temperature measuring equipment, together
When by the temperature of 13 real-time detection SCR inlet flue of mixed flue gas temperature measuring equipment, 16 exit mixed flue gas, then according to height
The temperature of 16 exit mixed flue gas of flue-gas temperature and SCR inlet flue in warm flue gas exit pipe road controls fuel gas flow
Regulating device 1, secondary air flow regulating device 3 and tuning wind flow regulator 4, so that 16 exit of SCR inlet flue is mixed
The temperature for closing flue gas is 360 DEG C -380 DEG C, to adapt to SCR reactor 15.
In practical operation, when the temperature of 16 exit mixed flue gas of SCR inlet flue is higher than default maximum temperature, control
Device 14 processed controls fuel gas flow regulator 1, secondary air flow regulating device 3 and tuning wind flow regulator 4, to increase
Add the temperature adjustment wind flow entered in tuning wind nozzle 7, reduces and enter the flow of fuel gas and air in burner 5
Flow；When the temperature of 16 exit mixed flue gas of SCR inlet flue is lower than default minimum temperature, controller 14 controls combustible gas
Body flow regulator 1, secondary air flow regulating device 3 and tuning wind flow regulator 4 enter tuning wind spray to reduce
Temperature adjustment wind flow in mouth 7, increase enters the flow of the flow of fuel gas and air in burner 5, so that SCR be entered
The temperature of mouth 16 exit mixed flue gas of flue is stablized in the range of 360 DEG C -380 DEG C.
Claims (6)
1. a kind of low-temperature smoke air SCR denitrating system, which is characterized in that including blower (2), secondary air flow regulating device (3), combustion
Burn room (6), tuning wind flow regulator (4), low-temperature flue gas pipeline, high-temperature flue gas output channel, SCR inlet flue (16),
Inflammable gas pipeline and controller (14)；
The outlet of blower (2) is divided into two-way, wherein all the way through the burning on secondary air flow regulating device (3) and combustion chamber (6)
Device (5) is connected, and another way is connected through tuning wind flow regulator (4) with the tuning wind nozzle (7) in combustion chamber (6)
Logical, the outlet of combustion chamber (6) is through the high-temperature flue gas injection apparatus (9) in high-temperature flue gas output channel and SCR inlet flue (16)
It is connected, inflammable gas pipeline is connected with the burner (5) on combustion chamber (6), is provided on inflammable gas pipeline flammable
Gas flow adjusting means (1) are provided on high-temperature flue gas output channel and go out flue gas temperature in pipeline for detecting high-temperature flue gas speed
The high-temperature flue gas temperature measuring equipment (12) of degree is provided with mixed flue gas temperature measuring equipment (13) at SCR inlet flue (16) upper outlet,
The outlet of SCR inlet flue (16) is connected with SCR reactor (15), and low-temperature flue gas pipeline enters with SCR inlet flue (16)
Mouth is connected, wherein controller (14) and mixed flue gas temperature measuring equipment (13), high-temperature flue gas temperature measuring equipment (12), fuel gas
Flow regulator (1), secondary air flow regulating device (3) and tuning wind flow regulator (4) are connected.
2. low-temperature smoke air SCR denitrating system according to claim 1, which is characterized in that be provided with high temperature in combustion chamber (6)
Flue gas flow equalizing device (8), wherein tuning wind nozzle (7) and high-temperature flue gas current equalizer (8) are sequentially distributed along the direction that flue gas circulates.
3. low-temperature smoke air SCR denitrating system according to claim 1, which is characterized in that setting in SCR inlet flue (16)
There are mixed flue gas current equalizer (10), wherein what high-temperature flue gas injection apparatus (9) and mixed flue gas current equalizer (10) circulated along flue gas
Direction is sequentially distributed.
4. low-temperature smoke air SCR denitrating system according to claim 3, which is characterized in that the inner wall of SCR inlet flue (16)
On be provided with thermal insulation layer (11), wherein mixed flue gas current equalizer (10) and high-temperature flue gas injection apparatus (9) face thermal insulation layer
(11)。
5. low-temperature smoke air SCR denitrating system according to claim 1, which is characterized in that on high-temperature flue gas injection apparatus (9)
Nozzle be uniformly distributed.
6. the working method of low-temperature smoke air SCR denitrating system described in a kind of claim 1, which comprises the following steps:
Air is divided into two-way after blower (2) are pressurized, wherein enters burning through secondary air flow regulating device (3) all the way
In device (5), another way sprays into combustion chamber as tuning wind after tuning wind flow regulator (4) and tuning wind nozzle (7)
(6) in, fuel gas enters in burner (5) through fuel gas flow regulator (1) to burn, to generate high temperature
Flue gas, the tuning wind that the high-temperature flue gas is sprayed through tuning wind nozzle (7) adjusts temperature, to form the high-temperature flue gas after temperature adjustment,
Then it is sprayed into SCR inlet flue (16) through high-temperature flue gas injection apparatus (9), the low-temperature flue gas of low-temperature flue gas pipeline output enters
To in SCR inlet flue (16), and the high-temperature flue gas ejected with high-temperature flue gas injection apparatus (9) is mixed, mixed to be formed
Flue gas is closed, then into progress SCR denitration processing in SCR reactor (15)；
Controller (14) is by the flue-gas temperature in high-temperature flue gas temperature measuring equipment (12) real-time detection high-temperature flue gas output channel, together
When by the temperature of mixed flue gas temperature measuring equipment (13) real-time detection SCR inlet flue (16) exit mixed flue gas, then root
Combustible gas is controlled according to the temperature of flue-gas temperature and SCR inlet flue (16) exit mixed flue gas in high-temperature flue gas output channel
Body flow regulator (1), secondary air flow regulating device (3) and tuning wind flow regulator (4), so that SCR inlet cigarette
The temperature of road (16) exit mixed flue gas is 360 DEG C -380 DEG C, to adapt to SCR reactor (15).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294267.9A CN109876659A (en) | 2019-04-12 | 2019-04-12 | A kind of low-temperature smoke air SCR denitrating system and its working method |
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| CN201910294267.9A CN109876659A (en) | 2019-04-12 | 2019-04-12 | A kind of low-temperature smoke air SCR denitrating system and its working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820293A (en) * | 2020-06-19 | 2021-12-21 | 核工业理化工程研究院 | Low-temperature gas spectrum measuring device and using method thereof |
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| CN207350356U (en) * | 2017-10-18 | 2018-05-11 | 东方电气集团东方锅炉股份有限公司 | Smoke-heating device for denitrating system |
| CN108105794A (en) * | 2017-11-30 | 2018-06-01 | 贵州黔桂发电有限责任公司 | A kind of SCR denitration system inlet flue gas temperature adaptive regulation method |
| US20180193796A1 (en) * | 2015-09-14 | 2018-07-12 | Mitsubishi Hitachi Power Systems, Ltd. | Boiler |
| CN108854531A (en) * | 2018-08-06 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of SCR equipment for denitrifying flue gas with a variety of regulatory functions |
| CN210079253U (en) * | 2019-04-12 | 2020-02-18 | 西安西热锅炉环保工程有限公司 | Low temperature flue gas SCR deNOx systems |
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2019
- 2019-04-12 CN CN201910294267.9A patent/CN109876659A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180193796A1 (en) * | 2015-09-14 | 2018-07-12 | Mitsubishi Hitachi Power Systems, Ltd. | Boiler |
| CN207350356U (en) * | 2017-10-18 | 2018-05-11 | 东方电气集团东方锅炉股份有限公司 | Smoke-heating device for denitrating system |
| CN108105794A (en) * | 2017-11-30 | 2018-06-01 | 贵州黔桂发电有限责任公司 | A kind of SCR denitration system inlet flue gas temperature adaptive regulation method |
| CN108854531A (en) * | 2018-08-06 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of SCR equipment for denitrifying flue gas with a variety of regulatory functions |
| CN210079253U (en) * | 2019-04-12 | 2020-02-18 | 西安西热锅炉环保工程有限公司 | Low temperature flue gas SCR deNOx systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820293A (en) * | 2020-06-19 | 2021-12-21 | 核工业理化工程研究院 | Low-temperature gas spectrum measuring device and using method thereof |
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