CN205939221U - Reduce uneven device of air heater hot junction inflation - Google Patents
Reduce uneven device of air heater hot junction inflation Download PDFInfo
- Publication number
- CN205939221U CN205939221U CN201620972851.7U CN201620972851U CN205939221U CN 205939221 U CN205939221 U CN 205939221U CN 201620972851 U CN201620972851 U CN 201620972851U CN 205939221 U CN205939221 U CN 205939221U
- Authority
- CN
- China
- Prior art keywords
- air preheater
- air
- gas
- hot junction
- air heater
- 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.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 29
- 235000019504 cigarettes Nutrition 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 1
- 239000000779 smoke Substances 0.000 description 19
- 238000000605 extraction Methods 0.000 description 3
- 206010022000 influenza Diseases 0.000 description 3
- 239000003517 fume Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses a reduce uneven device of air heater hot junction inflation, including air heater and controller, a plurality of sides of air heater's flue gas inlet are connected through a plurality of connecting pipes to air heater's exhanst gas outlet, just a plurality of sides of air heater's flue gas inlet all are equipped with temperature sensor, are equipped with flow control system on every connecting pipe, the flue gas temperature signal that the temperature sensor of every side of air heater's flue gas inlet will incline most likely all transmits to the controller, air heater's flue gas inlet's high temperature side and low temperature side are distinguished according to temperature signal to the controller, simultaneously, flow control system is adjusted according to the temperature difference of flue gas inlet high temperature side with the flue gas inlet low temperature side to the controller to the low temperature flue gas of control air heater's exhanst gas outlet gets into the air input of air heater's flue gas inlet high temperature side. Can reduce air preheater entry high temperature side gas temperature.
Description
Technical field
A kind of device reducing air preheater hot junction non-homogeneous expansion of this utility model.
Background technology
With the increase of power plant units capacity motor, flue cross section size becomes very huge, air preheater entrance
Flue gas Temperature Distribution is extremely uneven, and when at full capacity, high level can differ 60 DEG C～100 DEG C with low value, especially quadrangle tangential circle combustion
Burning boiler.Different flue-gas temperatures makes that air preheater fanning strip hot junction swell increment is unbalanced, and long-play does not only result in
Fanning strip deformation is serious, the lost of life, unit at full capacity when inlet flue gas temperature highest, fanning strip deflection is maximum, may result in air
Preheater bite is serious so that air preheater current fluctuation is big and peak value increases, once exceeding alarming value, disposes even meeting not in time
Cause that unit is non-to stop.
Typically solve this problem using following methods at present, some boilers are improved the standard flue by long-time steam soot blowing
Heating surface absorbs heat, and reduces back-end ductwork flue-gas temperature, but water consumption is big and shortens superheater service life；Some boilers pass through
Tune up the spacing of air preheater fanning strip and top, it is to avoid the big situation of air preheater current fluctuation occurs, but air preheat can be caused
Device air leak rate of air curtain raises, and increases blower fan and exerts oneself, and economy declines.
Utility model content
For overcoming the defect of prior art, the utility model discloses a kind of air preheat of minimizing hot junction non-homogeneous expansion
Device, can reduce air preheater entrance high temperature side cigarette temperature.
For achieving the above object, the technical solution of the utility model is：
A kind of device reducing air preheater hot junction non-homogeneous expansion, including air preheater and controller, described air
If the exhanst gas outlet of preheater connects the dry side of the gas approach of air preheater by some connecting tubes, and described air preheat
If the dry side of the gas approach of device is equipped with temperature sensor, each connecting tube is provided with flow control system；Air preheater
The temperature sensor of every side of gas approach the flue-gas temperature signal of this side is all transferred to controller, described controller according to
Temperature signal differentiates the high temperature side of gas approach and the low temperature side of air preheater, and meanwhile, described controller is according to gas approach
High temperature side and the temperature difference of gas approach low temperature side, adjust flow control system, thus controlling the exhanst gas outlet of air preheater
The gas approach high temperature side of low-temperature flue gas air inlet preheater air inflow.
Preferably, described flow control system is the booster fan of scalable blast.
Preferably, described flow control system is booster fan and electromagnetic valve.
Preferably, described connecting tube is provided with valve, the opening and closing of described controller control valve door.
Preferably, the gas approach of described air preheater is provided with air inlet pipe.
It is further preferred that each connecting tube is uniformly connected on air inlet tube wall.
Compared with prior art, the beneficial effects of the utility model are：
1st, this utility model is by entering the flue gas of the low-temperature flue gas after heat exchange and air preheater gas approach high temperature side
Row mixing, reduces the temperature of air preheater gas approach high temperature side flue gas, makes entrance entirety cigarette temperature uniformly, fanning strip hot junction
Expand uniformly and maximum deformation quantity declines, improve unit operation safety.
2nd, this utility model structure be simple and convenient to operate, effect obvious.
Brief description
Fig. 1 is the structural representation of this utility model embodiment 1；
Wherein, 1. air preheater, 2. air preheater smoke inlet, 3. air preheater exhanst gas outlet, 4. electromagnetic valve
I, 5. draw flue I, 6. booster fan I, 7. electromagnetic valve II, 8. draw flue II, 9. booster fan II, 10. control
Device processed.
Specific embodiment
To describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Embodiment 1
As shown in figure 1, a kind of device reducing air preheater hot junction non-homogeneous expansion, including air preheater 1 and control
Device 10, the air preheater exhanst gas outlet 3 of air preheater 1 passes through respectively to draw flue I 5 and draws flue II 8
It is connected on the tube wall of air preheater smoke inlet 2 both sides of air preheater 1, the both sides of air preheater smoke inlet 2
It is equipped with temperature sensor, draw flue I 5 and be provided with electromagnetic valve I 4 and booster fan I 6, draw and set on flue II 8
There are electromagnetic valve II 7 and booster fan II 9, controller 10 controls the aperture of electromagnetic valve and the switch of booster fan, air preheater
The temperature signal recording air preheater smoke inlet 2 both sides is all sent to control by the temperature sensor of the both sides of smoke inlet 2
Device 10 processed, controller 10 differentiates high temperature side and the low temperature side of air preheater smoke inlet 2 according to temperature signal.
If the flue-gas temperature drawing the side that flue I 5 connects air preheater smoke inlet 2 is higher than to draw fume pipe
Road II 8 connects the flue-gas temperature of the side of air preheater smoke inlet 2, and controller 10 is according to air preheater smoke inlet 2
High temperature side and the temperature difference of air preheater smoke inlet 2 low temperature side, open increase blower fan I 6 electromagnetic valve for adjusting I 4, thus controlling
The air inflow of the high temperature side of low-temperature flue gas air inlet preheater flue gas entrance 2 of air preheater exhanst gas outlet 3 processed, thus will
The temperature difference of air preheater smoke inlet 2 high temperature side and air preheater smoke inlet 2 low temperature side controls within 30 DEG C.
If the flue-gas temperature drawing the side that flue I 5 connects air preheater smoke inlet 2 is less than draws fume pipe
Road II 8 connects the flue-gas temperature of the side of air preheater smoke inlet 2, and controller 10 is according to air preheater smoke inlet 2
High temperature side and the temperature difference of air preheater smoke inlet 2 low temperature side, open increase blower fan II 9 electromagnetic valve for adjusting II 7, thus
Control the air inflow of the high temperature side of low-temperature flue gas air inlet preheater flue gas entrance 2 of air preheater exhanst gas outlet 3, thus
The temperature difference of air preheater smoke inlet 2 high temperature side and air preheater smoke inlet 2 low temperature side is controlled within 30 DEG C.
The air preheater fanning strip hot junction of the present embodiment is under more uniform temperature field, expands uniformly and peak value subtracts
Little, reduce air preheater vibration, current wave momentum reduces, and improves unit general safety operation level.
Embodiment 2
The present embodiment is same as Example 1, and difference is, the present embodiment includes 4 extraction flues, and each
Draw and electromagnetic valve and booster fan are equipped with flue, the outlet of 4 extraction flues is uniformly connected to air preheat
At device smoke inlet 2.
Embodiment 3
The present embodiment is same as Example 1, and difference is, the present embodiment includes 6 extraction flues, and each
Draw and electromagnetic valve and booster fan are equipped with flue, draw flue for 6 and be uniformly connected to air preheater flue gas
At entrance 2.
Although the above-mentioned accompanying drawing that combines is described to specific embodiment of the present utility model, not to utility model
The restriction of protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, this area
Technical staff does not need to pay the various modifications that creative work can make or deformation still in protection domain of the present utility model
Interior.
Claims (6)
1. a kind of device reducing air preheater hot junction non-homogeneous expansion, is characterized in that, including air preheater and controller, institute
If the exhanst gas outlet stating air preheater connects the dry side of the gas approach of air preheater by some connecting tubes, and described sky
If the dry side of the gas approach of air preheater is equipped with temperature sensor, each connecting tube is provided with flow control system；Air
The flue-gas temperature signal of this side is all transferred to controller by the temperature sensor of every side of the gas approach of preheater, described control
Device differentiates the high temperature side of gas approach and the low temperature side of air preheater according to temperature signal, and meanwhile, described controller is according to cigarette
Gas import high temperature side and the temperature difference of gas approach low temperature side, adjust flow control system, thus controlling the cigarette of air preheater
The air inflow of the gas approach high temperature side of low-temperature flue gas air inlet preheater of gas outlet.
2. a kind of device reducing air preheater hot junction non-homogeneous expansion as claimed in claim 1, is characterized in that, described flow
Control system is the booster fan of scalable blast.
3. a kind of device reducing air preheater hot junction non-homogeneous expansion as claimed in claim 1, is characterized in that, described flow
Control system is booster fan and electromagnetic valve.
4. a kind of device reducing air preheater hot junction non-homogeneous expansion as claimed in claim 1, is characterized in that, described connection
Pipe is provided with valve, the opening and closing of described controller control valve door.
5. a kind of device reducing air preheater hot junction non-homogeneous expansion as claimed in claim 1, is characterized in that, described air
The gas approach of preheater is provided with air inlet pipe.
6. a kind of device reducing air preheater hot junction non-homogeneous expansion as claimed in claim 5, is characterized in that, each connection
Pipe is uniformly connected on air inlet tube wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620972851.7U CN205939221U (en) | 2016-08-29 | 2016-08-29 | Reduce uneven device of air heater hot junction inflation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620972851.7U CN205939221U (en) | 2016-08-29 | 2016-08-29 | Reduce uneven device of air heater hot junction inflation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205939221U true CN205939221U (en) | 2017-02-08 |
Family
ID=57953077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620972851.7U Active CN205939221U (en) | 2016-08-29 | 2016-08-29 | Reduce uneven device of air heater hot junction inflation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205939221U (en) |
-
2016
- 2016-08-29 CN CN201620972851.7U patent/CN205939221U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |