CN109876660A - A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method - Google Patents
A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method Download PDFInfo
- Publication number
- CN109876660A CN109876660A CN201910294275.3A CN201910294275A CN109876660A CN 109876660 A CN109876660 A CN 109876660A CN 201910294275 A CN201910294275 A CN 201910294275A CN 109876660 A CN109876660 A CN 109876660A
- Authority
- CN
- China
- Prior art keywords
- temperature
- flue gas
- scr
- flue
- scr inlet
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000003546 flue gas Substances 0.000 claims abstract description 71
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 239000002737 fuel gas Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims description 6
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 239000005439 thermosphere Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a kind of Direct-type low-temperature smoke air SCR denitrating system and its working methods, burner and tuning wind nozzle are provided in SCR inlet flue, wherein, the outlet of blower is divided into two-way, wherein it is connected all the way through secondary air flow regulating device with the entrance of burner, another way is connected through tuning wind flow regulator with the entrance of tuning wind nozzle, inflammable gas pipeline is connected with the entrance of burner, fuel gas flow regulator is provided on inflammable gas pipeline, low-temperature flue gas pipeline is connected with the entrance of SCR inlet flue, the outlet of SCR inlet flue is connected with SCR reactor, the high-temperature flue gas temperature measuring equipment for detecting mixed flue gas temperature at SCR inlet flue outlet is provided on SCR inlet flue, the system and its working method can be realized low-temperature flue gas SCR denitration processing, and cost is relatively low.
Description
Technical field
The invention belongs to SCR denitration technical field, it is related to a kind of Direct-type low-temperature smoke air SCR denitrating system and its work side
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 be related to a kind of system, which can be realized the SCR denitration processing of low-temperature flue gas, need simultaneously
Consider cost problem.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, it is de- to provide a kind of Direct-type low-temperature smoke air SCR
Nitre system and its working method, the system and its working method can be realized low-temperature flue gas SCR denitration processing, and cost compared with
It is low.
In order to achieve the above objectives, Direct-type low-temperature smoke air SCR denitrating system of the present invention include SCR inlet flue,
Blower, secondary air flow regulating device, tuning wind flow regulator, inflammable gas pipeline, low-temperature flue gas pipeline, SCR inlet
Flue, SCR reactor and controller；
Burner and tuning wind nozzle are provided in SCR inlet flue, wherein the outlet of blower is divided into two-way, wherein
It is connected all the way through secondary air flow regulating device with the entrance of burner, another way is through tuning wind flow regulator and adjusts
The entrance of warm wind nozzle is connected, and inflammable gas pipeline is connected with the entrance of burner, is provided on inflammable gas pipeline
Fuel gas flow regulator, low-temperature flue gas pipeline are connected with the entrance of SCR inlet flue, the outlet of SCR inlet flue
It is connected with SCR reactor, is provided on SCR inlet flue for detecting mixed flue gas temperature at SCR inlet flue outlet
High-temperature flue gas temperature measuring equipment, controller and high-temperature flue gas temperature measuring equipment, fuel gas flow regulator, temperature adjustment wind flow are adjusted
Device and secondary air flow regulating device are connected.
Flue gas flow equalizing device is additionally provided in SCR inlet flue, wherein tuning wind nozzle, flue gas flow equalizing device and high-temperature flue gas
Temperature measuring equipment is set gradually along the direction that flue gas circulates.
Thermal insulation layer is provided on the inner wall of SCR inlet flue, wherein burner, tuning wind nozzle and flue gas flow equalizing device
Equal face thermal insulation layer.
The working method of Direct-type low-temperature smoke air SCR denitrating system of the present invention is the following steps are included: air passes through wind
It is divided into two-way after machine pressurization, wherein entering in burner through secondary air flow regulating device all the way, another way is through tuning wind
Flow regulator enters in tuning wind nozzle as tuning wind, and the fuel gas of inflammable gas pipeline output is through burner
It burns, to generate high-temperature flue gas, the tuning wind that the high-temperature flue gas is exported through tuning wind nozzle enters after adjusting temperature
The denitration of flue gas is carried out in SCR reactor；
Controller passes through the temperature information of flue gas at high-temperature flue gas temperature measuring equipment real-time detection SCR inlet flue outlet, and
Secondary air flow regulating device, tuning wind flow regulator are controlled according to the temperature information of flue gas at SCR inlet flue outlet
And fuel gas flow regulator, so that the temperature of flue gas is within the scope of 360 DEG C -380 DEG C at SCR inlet flue outlet,
To meet the denitrating flue gas requirement of SCR reactor.
The invention has the following advantages:
Direct-type low-temperature smoke air SCR denitrating system of the present invention and its working method are when specific operation, by can
Combustion gas volumetric combustion is mixed to generate high-temperature flue gas, then by high-temperature flue gas with low-temperature flue gas, so that the temperature of mixed flue gas is full
The denitration reaction requirement of sufficient SCR reactor, it should be noted that burner is directly arranged at SCR inlet flue in the present invention
It is interior, intermediate link bring cost problem is avoided, structure is simple, and easy to operate, practicability is stronger.
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 tuning wind nozzle, 7 be flue gas flow equalizing device, 8 be thermal insulation layer, 9 be high-temperature flue gas survey
Warm device, 10 be controller, 11 be SCR reactor, 12 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, Direct-type low-temperature smoke air SCR denitrating system of the present invention include SCR inlet flue 12, blower 2,
Secondary air flow regulating device 3, tuning wind flow regulator 4, inflammable gas pipeline, low-temperature flue gas pipeline, SCR inlet flue
12, SCR reactor 11 and controller 10；Burner 5 and tuning wind nozzle 6 are provided in SCR inlet flue 12, wherein wind
The outlet of machine 2 is divided into two-way, wherein be connected all the way through secondary air flow regulating device 3 with the entrance of burner 5, another way
It is connected through tuning wind flow regulator 4 with the entrance of tuning wind nozzle 6, the entrance of inflammable gas pipeline and burner 5
It is connected, fuel gas flow regulator 1, low-temperature flue gas pipeline and SCR inlet flue 12 is provided on inflammable gas pipeline
Entrance be connected, the outlet of SCR inlet flue 12 is connected with SCR reactor 11, is provided with and is used on SCR inlet flue 12
Detect the high-temperature flue gas temperature measuring equipment 9 of 12 exit mixed flue gas temperature of SCR inlet flue, controller 10 and high-temperature flue gas thermometric
Device 9, fuel gas flow regulator 1, tuning wind flow regulator 4 and secondary air flow regulating device 3 are connected.
Flue gas flow equalizing device 7 is additionally provided in SCR inlet flue 12, wherein tuning wind nozzle 6, flue gas flow equalizing device 7 and high temperature
Flue gas temperature measuring equipment 9 is set gradually along the direction that flue gas circulates；Thermal insulation layer 8 is provided on the inner wall of SCR inlet flue 12,
In, burner 5, tuning wind nozzle 6 and the equal face thermal insulation layer 8 of flue gas flow equalizing device 7.
The working method of Direct-type low-temperature smoke air SCR denitrating system of the present invention is the following steps are included: air passes through wind
Machine 2 is divided into two-way after being pressurized, wherein entering in burner 5 through secondary air flow regulating device 3 all the way, another way is through temperature adjustment
Distinguished and admirable quantity regulating device 4 enters in tuning wind nozzle 6 as tuning wind, and the fuel gas of inflammable gas pipeline output is through burning
Device 5 burns, to generate high-temperature flue gas, after the tuning wind that the high-temperature flue gas is exported through tuning wind nozzle 6 adjusts temperature
It enters in SCR reactor 11 and carries out the denitration of flue gas；
Controller 10 is believed by the temperature of 9 real-time detection SCR inlet flue of high-temperature flue gas temperature measuring equipment, 12 exit flue gas
Breath, and secondary air flow regulating device 3, temperature adjustment wind flow are controlled according to the temperature information of 12 exit flue gas of SCR inlet flue
Regulating device 4 and fuel gas flow regulator 1 so that the temperature of 12 exit flue gas of SCR inlet flue be in 360 DEG C-
Within the scope of 380 DEG C, to meet the denitrating flue gas requirement of SCR reactor 11.
In practical operation, when the temperature of 12 exit mixed flue gas of SCR inlet flue is higher than default maximum temperature, control
Device 10 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 6, reduces and enter the flow of fuel gas and air in burner 5
Flow；When the temperature of 12 exit mixed flue gas of SCR inlet flue is lower than default minimum temperature, controller 10 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 6, increase enters the flow of the flow of fuel gas and air in burner 5, so that SCR be entered
The temperature of mouth 12 exit mixed flue gas of flue is stablized in the range of 360 DEG C -380 DEG C.
Claims (4)
1. a kind of Direct-type low-temperature smoke air SCR denitrating system, which is characterized in that including SCR inlet flue (12), blower (2), two
Secondary distinguished and admirable quantity regulating device (3), tuning wind flow regulator (4), inflammable gas pipeline, low-temperature flue gas pipeline, SCR inlet cigarette
Road (12), SCR reactor (11) and controller (10)；
Burner (5) and tuning wind nozzle (6) are provided in SCR inlet flue (12), wherein the outlet of blower (2) is divided into
Two-way, wherein being connected all the way through secondary air flow regulating device (3) with the entrance of burner (5), another way is through tuning wind
Flow regulator (4) is connected with the entrance of tuning wind nozzle (6), the entrance phase of inflammable gas pipeline and burner (5)
It is connected to, is provided with fuel gas flow regulator (1) on inflammable gas pipeline, low-temperature flue gas pipeline and SCR inlet flue
(12) entrance is connected, and the outlet of SCR inlet flue (12) is connected with SCR reactor (11), on SCR inlet flue (12)
It is provided with the high-temperature flue gas temperature measuring equipment (9) for detecting SCR inlet flue (12) exit mixed flue gas temperature, controller
(10) with high-temperature flue gas temperature measuring equipment (9), fuel gas flow regulator (1), tuning wind flow regulator (4) and secondary
Distinguished and admirable quantity regulating device (3) is connected.
2. Direct-type low-temperature smoke air SCR denitrating system according to claim 1, which is characterized in that SCR inlet flue (12)
Inside it is additionally provided with flue gas flow equalizing device (7), wherein tuning wind nozzle (6), flue gas flow equalizing device (7) and high-temperature flue gas temperature measuring equipment (9)
Direction along flue gas circulation is set gradually.
3. Direct-type low-temperature smoke air SCR denitrating system according to claim 1, which is characterized in that SCR inlet flue (12)
Inner wall on be provided with thermal insulation layer (8), wherein burner (5), tuning wind nozzle (6) and flue gas flow equalizing device (7) face every
Thermosphere (8).
4. the working method of Direct-type low-temperature smoke air SCR denitrating system described in a kind of claim 1, which is characterized in that including with
Lower step: air is divided into two-way after blower (2) are pressurized, wherein entering combustion through secondary air flow regulating device (3) all the way
It burns in device (5), another way enters in tuning wind nozzle (6) through tuning wind flow regulator (4) as tuning wind, flammable
The fuel gas of gas pipeline output burns through burner (5), and to generate high-temperature flue gas, the high-temperature flue gas is through temperature adjustment
The tuning wind of wind nozzle (6) output enters in SCR reactor (11) denitration for carrying out flue gas after adjusting temperature；
Controller (10) passes through the temperature of high-temperature flue gas temperature measuring equipment (9) real-time detection SCR inlet flue (12) exit flue gas
Information, and secondary air flow regulating device (3), temperature adjustment are controlled according to the temperature information of SCR inlet flue (12) exit flue gas
Distinguished and admirable quantity regulating device (4) and fuel gas flow regulator (1), so that the temperature of SCR inlet flue (12) exit flue gas
Degree is within the scope of 360 DEG C -380 DEG C, to meet the denitrating flue gas requirement of SCR reactor (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294275.3A CN109876660A (en) | 2019-04-12 | 2019-04-12 | A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294275.3A CN109876660A (en) | 2019-04-12 | 2019-04-12 | A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109876660A true CN109876660A (en) | 2019-06-14 |
Family
ID=66937114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910294275.3A Pending CN109876660A (en) | 2019-04-12 | 2019-04-12 | A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109876660A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007275838A (en) * | 2006-04-11 | 2007-10-25 | Babcock Hitachi Kk | Exhaust gas denitration apparatus and its operation method |
| CN103041703A (en) * | 2012-12-27 | 2013-04-17 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN204962817U (en) * | 2015-09-08 | 2016-01-13 | 东方电气集团东方锅炉股份有限公司 | SCR flue gas denitration system that full load mode put into operation |
| 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 |
| CN210079252U (en) * | 2019-04-12 | 2020-02-18 | 西安西热锅炉环保工程有限公司 | Direct type low temperature flue gas SCR deNOx systems |
-
2019
- 2019-04-12 CN CN201910294275.3A patent/CN109876660A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007275838A (en) * | 2006-04-11 | 2007-10-25 | Babcock Hitachi Kk | Exhaust gas denitration apparatus and its operation method |
| CN103041703A (en) * | 2012-12-27 | 2013-04-17 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN204962817U (en) * | 2015-09-08 | 2016-01-13 | 东方电气集团东方锅炉股份有限公司 | SCR flue gas denitration system that full load mode put into operation |
| 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 |
| CN210079252U (en) * | 2019-04-12 | 2020-02-18 | 西安西热锅炉环保工程有限公司 | Direct type low temperature flue gas SCR deNOx systems |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107152695B (en) | Heating furnace visualization combustion control system and control method based on many reference amounts detection | |
| CN204460275U (en) | A kind of combustion energy saving safety control system | |
| CN113266843B (en) | Combustion optimization method, system and device for coal-fired boiler | |
| CN107763657A (en) | A kind of Boiler Combustion Optimization System of thermal power plant's thermoisopleth sound wave temperature measuring unit | |
| CN103672948A (en) | Combustion control system and method of industrial furnace | |
| CN106196134A (en) | A kind of fume afterheat energy-conserving and environment-protective coal dust preparation system | |
| CN103712468A (en) | Combustion control system and method for lowering oxygenation burning losses of industrial furnace | |
| CN106247396A (en) | A kind of control system of burner optimization burning | |
| CN208751298U (en) | A kind of automatic combustion-compensating device of low-temperature flue gas waste heat | |
| CN112268296A (en) | Primary air control system capable of realizing online monitoring and intelligent adjustment and operation method | |
| CN102686946A (en) | Method for correcting the combustion settings of a set of combustion chambers and apparatus implementing the method | |
| CN108105794A (en) | A kind of SCR denitration system inlet flue gas temperature adaptive regulation method | |
| CN103807863B (en) | A kind of cigarette temperature controlling system for SCR transformation | |
| CN113341713B (en) | Coal-air synchronous dynamic coordination control method for coal-fired unit | |
| CN109876660A (en) | A kind of Direct-type low-temperature smoke air SCR denitrating system and its working method | |
| CN107906553A (en) | A kind of Boiler Air Heater's optimization progress control method and device | |
| CN104989501B (en) | A kind of SCR system temperature compensation device peculiar to vessel | |
| CN203731707U (en) | Control system for fuel oil gas conduction oil boiler | |
| CN105371670B (en) | A kind of Industrial Stoves polyoxy combustion product gases reduction reuse means and its operation method | |
| CN109876659A (en) | A kind of low-temperature smoke air SCR denitrating system and its working method | |
| CN205316379U (en) | Boiler operation oxygen volume automatic control system and boiler | |
| CN210079252U (en) | Direct type low temperature flue gas SCR deNOx systems | |
| CN210079253U (en) | Low temperature flue gas SCR deNOx systems | |
| CN103398397A (en) | Combustion system of boiler and combustion method implemented by aid of system | |
| CN205316377U (en) | Opposed firing after -flame amount of wind automatic control system and boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190614 |