CN207734831U - Solve the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness - Google Patents
Solve the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness Download PDFInfo
- Publication number
- CN207734831U CN207734831U CN201721173912.4U CN201721173912U CN207734831U CN 207734831 U CN207734831 U CN 207734831U CN 201721173912 U CN201721173912 U CN 201721173912U CN 207734831 U CN207734831 U CN 207734831U
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- CN
- China
- Prior art keywords
- gas pass
- vertical gas
- scr inlet
- flue
- turbulent baffle
- 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.)
- Expired - Fee Related
Links
- 239000007789 gas Substances 0.000 claims abstract description 61
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003546 flue gas Substances 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000013517 stratification Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229940095054 ammoniac Drugs 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 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
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical group [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model is related to a kind of vertical gas pass flow-disturbing system of solution SCR inlet temperature flow field unevenness, the system comprises：The turbulent baffle being hinged on the walling of flue of SCR inlet vertical gas pass, the turbulent baffle jointed crank connecting rod mechanism, the rotation angle of turbulent baffle is controlled by the crank connecting, the turbulent baffle rotates between 0 ° to 90 °, the flow-disturbing flow-stopping plate is under 0 ° of state, the turbulent baffle is bonded the walling of flue setting of the SCR inlet vertical gas pass, and the facing walling of flue of the SCR inlet vertical gas pass is equipped with the temperature sensor for obtaining the flue gas passed through in flue.
Description
Technical field
The utility model is related to a kind of vertical gas pass flow-disturbings of SCR inlet temperature flow field unevenness after solution gas bypass transformation
Baffle technology.
Background technology
Thermal power generation unit is all made of SCR denitration technology at present, and core equipment is vanadium Ti-base catalyst, the work in catalyst
Property ingredient be V2O5.Catalyst generally allows running temperature section at 300~420 DEG C, when flue-gas temperature is less than 300 DEG C, takes off
The ammonia of nitre entrance can be reacted with the SO3 in flue gas generates sulfate of ammoniac and hydrogen sulfate ammonia (commonly referred to as ABS), in certain temperature region
In range, ABS is that liquid easily penetrates into denitrating catalyst capillary micropore, and NH3 and NO in flue gas is hindered to be diffused into catalyst activity
Grain surface carries out reduction reaction, causes catalyst activity to reduce or fail, causes catalyst poisoning, equipment for denitrifying flue gas is logical thus
Standing fixed minimum continuous spray ammonia temperature MOT, the temperature are usually set to 300 DEG C or so.When SCR inlet flue-gas temperature is less than 300
DEG C, it is necessary to stop spray ammonia (or spraying ammonia in short term).
Since the boiler gone into operation before 2008 does not design denitrification apparatus substantially, most boilers there is
The problem of economizer exit smoke temperature is less than 300 DEG C when 50%-70% loads；In addition by recent years, fired power generating unit averagely utilizes small
When the influence that declines, fired power generating unit rate of load condensate reduces year by year, in individual periods power scheduling require unit to maintain 50% load
Operation makes former boiler of the design with denitrification apparatus the problem that SCR inlet flue-gas temperature is low when underload also occur；
National Energy Board continuously held a meeting and sent the documents at 2016 beginning of the year, proposed clearly to want to carrying out thermoelectricity flexibility transformation
It asks, China implements the flexibility transformation of 2.2 hundred million kilowatts of coal units during plan " 13 ", and unit is enable to have depth peak regulation
Power, and load -response-speed is further increased, part of generating units has rapid starting/stopping peak modulation capacity.Promotion flexibility transformation is expected will
Thermoelectricity unit is set to increase the peak modulation capacity of 20% rated capacity, minimum technology output reaches 40%~50% rated capacity；Pure condensate
Unit increases the peak modulation capacity of 15%~20% rated capacity, and minimum technology output reaches 30%~35% rated capacity.
Under the forcing of above-mentioned situation, power plant is less than 50% load and following operation to meet unit, takes boiler
Tail flue gas bypass flue renovation technique, the method that the high-temperature flue gas by extracting front flue is mixed with low-temperature flue gas, is improved
SCR inlet flue-gas temperature, denitrification apparatus puts into temperature requirements when meeting underload.
In view of above-mentioned defect, the designer is actively subject to research and innovation, to design a kind of solution SCR inlet temperature stream
The uneven vertical gas pass flow-disturbing system in field, makes it with more the utility value in industry.
Utility model content
To solve above-mentioned technology, safety problem, the purpose of this utility model is to provide a kind of laminar flow being sufficiently destroyed flue gas
State makes flue gas be sufficiently mixed, and flue gas bulk temperature is finally made to reach unanimity, and thoroughly eliminates the solution of temperature flow field deviation
The vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness.
The utility model solves the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness, including：SCR is hinged on to enter
Turbulent baffle on the walling of flue of mouth vertical gas pass, the turbulent baffle jointed crank connecting rod mechanism are connected by the crank
The rotation angle of mechanism controls turbulent baffle, the turbulent baffle rotate between 0 ° to 90 °, and the flow-disturbing flow-stopping plate is in 0 ° of shape
Under state, the turbulent baffle is bonded the walling of flue setting of the SCR inlet vertical gas pass, and the SCR inlet vertical gas pass is practised physiognomy
To walling of flue be equipped with temperature sensor for obtaining the flue gas passed through in flue.
Further, with the length direction that the length direction of SCR inlet vertical gas pass is the turbulent baffle, the flow-disturbing
The length of baffle is not less than the 1/2 of SCR inlet vertical gas pass, and the length of the turbulent baffle is not more than the vertical cigarette of SCR inlet
The 2/3 of road.
Further, the bottom of the turbulent baffle is equipped with several ash discharges, and the center spacing of two neighboring ash discharging hole is 1.0
To 1.5mm.
Further, the ash discharging hole is rectangle, circle or diamond structure.
Further, one end of the crank connecting is connect with the turbulent baffle, and the crank connects machine
The other end of structure is connect with speed reducer, and the speed reducer is driven by motor.
Further, when the angle between the walling of flue of SCR inlet vertical gas pass of the turbulent baffle is in more than 0 °,
The opening upwards of the turbulent baffle.
Further, the push rod of the crank connecting is connected with the turbulent baffle, and the end of the push rod is equipped with
It perforates, is set in the reinforcing plate there are two installation part, each installation part is equipped with pin shaft hole, and the push rod is arranged in two installation parts
Between, axis pin passes through the perforation, pin shaft hole, the push rod to be rotatably connected to one by axis pin and the turbulent baffle
It rises.
Further, the position that the turbulent baffle is connect with the push rod is equipped with reinforcing plate, the installation part setting
In the reinforcing plate.
Further, the push rod is cylindrical-shaped structure, and the walling of flue of the SCR inlet vertical gas pass is equipped with pipe,
The push rod passes through the pipe.
According to the above aspect of the present invention, the utility model solves the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness at least
It has the following advantages：
Turbulent baffle can effectively change flue gas flow direction on front side of SCR inlet flue, so that flue gas is fully disturbed and is mixed, thoroughly disappear
Except the flue-gas temperature deviation brought due to laminar flow boundary layer.
Push rod can be driven by driving motor and speed reducer, can flexibly be adjusted according to the size of vertical flue both sides smoke temperature difference
Whole turbulent baffle angle achievees the purpose that eliminate gas temperature windage.
When gas bypass is out of service and smokeless temperature deviation, 9. push rod is withdrawn by driving motor and speed reducer,
Turbulent baffle is stowed away, and one is formed with former flue.
Ash discharging hole is designed in turbulent baffle lower part, the problem of effectively preventing dust stratification in baffle and flue wall surface angle.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.
Description of the drawings
Fig. 1 is the utility model back-end ductwork bypass transformation and flue gas mixing, flowing pattern schematic figure；
Fig. 2 is the schematic diagram for the vertical gas pass flow-disturbing system that the utility model solves SCR inlet temperature flow field unevenness；
Fig. 3 is the vertical gas pass flow-disturbing system and flue gas mixing, stream that the utility model solves SCR inlet temperature flow field unevenness
Dynamic pattern schematic；
Fig. 4 is the office of the embodiment 1 for the vertical gas pass flow-disturbing system that the utility model solves SCR inlet temperature flow field unevenness
Portion's schematic diagram；
Fig. 5 is the office of the embodiment 2 for the vertical gas pass flow-disturbing system that the utility model solves SCR inlet temperature flow field unevenness
Portion's schematic diagram；
Fig. 6 is the turbulent baffle for the vertical gas pass flow-disturbing system that the utility model solves SCR inlet temperature flow field unevenness
Structural schematic diagram；
In figure：Flue gas back-end ductwork 1；Out of stock ontology flue 2；Gas bypass 3；Gas bypass controllable register 4；Gas bypass
Turn off baffle 5；Economizer flue collector adjustable plate 6；Ammonia injector 7；SCR inlet vertical gas pass 8；Retarder 9；Turbulent baffle
10；Push rod 11.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
Embodiment 1
As shown in Figures 1 to 4, the present embodiment solves the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness, including：
The turbulent baffle being hinged on the walling of flue of SCR inlet vertical gas pass, the turbulent baffle jointed crank connecting rod mechanism, passes through institute
The rotation angle of crank connecting control turbulent baffle is stated, the turbulent baffle rotates between 0 ° to 90 °, the flow-disturbing gear
For flowing plate under 0 ° of state, the turbulent baffle is bonded the walling of flue setting of the SCR inlet vertical gas pass, and the SCR inlet hangs down
The facing walling of flue of straight flue is equipped with the temperature sensor for obtaining the flue gas passed through in flue.
In the present embodiment, the angle between the walling of flue of SCR inlet vertical gas pass of the turbulent baffle is in be more than 0 °
When, the opening upwards of the turbulent baffle.With the length side that the length direction of SCR inlet vertical gas pass is the turbulent baffle
To the length of the turbulent baffle is not less than the 1/2 of SCR inlet vertical gas pass, and the length of the turbulent baffle is not more than SCR
The 2/3 of entrance vertical gas pass.
The push rod of the crank connecting is connected with the turbulent baffle, and the end of the push rod is equipped with perforation, described
It is set in reinforcing plate there are two installation part, each installation part is equipped with pin shaft hole, and the push rod is arranged between two installation parts, axis pin
Across the perforation, pin shaft hole, the push rod is rotatably connected together by axis pin and the turbulent baffle.
Further, one end of the crank connecting is connect with the turbulent baffle, and the crank connects machine
The other end of structure is connect with speed reducer, and the speed reducer is driven by motor.
The present embodiment solves the operation principle of the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness：By flue gas
After road 3 is put into, when 8 front and rear sides smoke temperature difference of SCR inlet vertical gas pass larger (reaching 10 DEG C), to the safety of denitration agent
Operation constitutes certain threat, drives push rod 11 by driving motor and speed reducer 9 at this time, turbulent baffle 10 is headed into SCR and is entered
In mouth vertical gas pass 8, turbulent baffle 10 is made to form certain angle [alpha], 0 ° of α ＞ with vertical gas pass.
After gas bypass 3 is put into, bypass flue gas and 1 top flue gas forming layer stream of flue collector, and along the vertical cigarette of SCR inlet
8 front side flow of road, and the flue gas of 1 lower part of flue collector flows after turning to along 8 rear side of SCR inlet vertical gas pass.
When flue gas passes through turbulent baffle 10, half side mixed flue gas flow direction is forced to change before flue, is filled with the flue gas of rear side
Divide and disturb and mix, laminar flow watershed area is entirely destroyed, and smoke-filling movement reaches unanimity, and eliminates flue-gas temperature deviation.
Embodiment 2
As shown in FIG. 5 and 6, the present embodiment solves the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness, is implementing
On the basis of example 1, the bottom of the turbulent baffle is equipped with several ash discharges, the center spacing of two neighboring ash discharging hole be 1.0 to
1.5mm.To prevent dust stratification between turbulent baffle and flue wall surface, wall surface can not be adjacent to when withdrawing by influencing turbulent baffle, in baffle
The separated several baffle ash discharging holes in top.When having dust stratification in angle between baffle and flue, dust stratification can be discharged by ash discharging hole.
In the present embodiment, the ash discharging hole is rectangle, circle or diamond structure.
In the various embodiments described above, the position that the turbulent baffle is connect with the push rod is equipped with reinforcing plate, the installation
Part is arranged in the reinforcing plate.
In the various embodiments described above, the push rod is cylindrical-shaped structure, and the walling of flue of the SCR inlet vertical gas pass is equipped with
Pipe, the push rod pass through the pipe.
The above is only the preferred embodiment of the utility model, is not intended to limit the utility model, it is noted that
For those skilled in the art, without deviating from the technical principle of the utility model, it can also do
Go out several improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of vertical gas pass flow-disturbing system solving SCR inlet temperature flow field unevenness, which is characterized in that including：It is hinged on SCR
Turbulent baffle on the walling of flue of entrance vertical gas pass, the turbulent baffle jointed crank connecting rod mechanism, is connected by the crank
Connection mechanism controls the rotation angle of turbulent baffle, and the turbulent baffle rotates between 0 ° to 90 °, and the flow-disturbing flow-stopping plate is at 0 °
Under state, the turbulent baffle is bonded the walling of flue setting of the SCR inlet vertical gas pass, the SCR inlet vertical gas pass phase
The walling of flue faced is equipped with the temperature sensor for obtaining the flue gas passed through in flue.
2. the vertical gas pass flow-disturbing system according to claim 1 for solving SCR inlet temperature flow field unevenness, feature exist
In with the length direction that the length direction of SCR inlet vertical gas pass is the turbulent baffle, the length of the turbulent baffle is not small
In the 1/2 of SCR inlet vertical gas pass, and the length of the turbulent baffle is not more than the 2/3 of SCR inlet vertical gas pass.
3. the vertical gas pass flow-disturbing system according to claim 1 for solving SCR inlet temperature flow field unevenness, feature exist
In the bottom of the turbulent baffle is equipped with several ash discharges, and the center spacing of two neighboring ash discharging hole is 1.0 to 1.5mm.
4. the vertical gas pass flow-disturbing system according to claim 3 for solving SCR inlet temperature flow field unevenness, feature exist
In the ash discharging hole is rectangle, circle or diamond structure.
5. the vertical gas pass flow-disturbing system according to claim 1 for solving SCR inlet temperature flow field unevenness, feature exist
In one end of the crank connecting is connect with the turbulent baffle, the other end and speed reducer of the crank connecting
Connection, the speed reducer are driven by motor.
6. the vertical gas pass flow-disturbing system according to claim 1 for solving SCR inlet temperature flow field unevenness, feature exist
In, when the angle between the walling of flue of SCR inlet vertical gas pass of the turbulent baffle is in more than 0 °, the turbulent baffle
Opening upwards.
7. the vertical gas pass flow-disturbing system according to claim 1 for solving SCR inlet temperature flow field unevenness, feature exist
In the push rod of the crank connecting is connected with the turbulent baffle, and the end of the push rod is equipped with perforation, is set in reinforcing plate
There are two installation part, each installation part is equipped with pin shaft hole, and the push rod is arranged between two installation parts, and axis pin passes through described
Perforation, pin shaft hole, the push rod are rotatably connected together by axis pin and the turbulent baffle.
8. the vertical gas pass flow-disturbing system according to claim 7 for solving SCR inlet temperature flow field unevenness, feature exist
In the position that the turbulent baffle is connect with the push rod is equipped with reinforcing plate, and the installation part is arranged in the reinforcing plate.
9. the vertical gas pass flow-disturbing system according to claim 7 for solving SCR inlet temperature flow field unevenness, feature exist
In the push rod is cylindrical-shaped structure, and the walling of flue of the SCR inlet vertical gas pass is equipped with pipe, and the push rod passes through institute
State pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173912.4U CN207734831U (en) | 2017-09-13 | 2017-09-13 | Solve the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173912.4U CN207734831U (en) | 2017-09-13 | 2017-09-13 | Solve the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207734831U true CN207734831U (en) | 2018-08-17 |
Family
ID=63114927
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721173912.4U Expired - Fee Related CN207734831U (en) | 2017-09-13 | 2017-09-13 | Solve the vertical gas pass flow-disturbing system of SCR inlet temperature flow field unevenness |
Country Status (1)
| Country | Link |
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| CN (1) | CN207734831U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889117A (en) * | 2018-09-03 | 2018-11-27 | 广州市绿森环保设备有限公司 | Upright type photocatalytic deodorizing device |
-
2017
- 2017-09-13 CN CN201721173912.4U patent/CN207734831U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889117A (en) * | 2018-09-03 | 2018-11-27 | 广州市绿森环保设备有限公司 | Upright type photocatalytic deodorizing device |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 |
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| CF01 | Termination of patent right due to non-payment of annual fee |