CN206470092U - Boiler water wall near wall region flue gas sampling device - Google Patents
Boiler water wall near wall region flue gas sampling device Download PDFInfo
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- CN206470092U CN206470092U CN201720177174.4U CN201720177174U CN206470092U CN 206470092 U CN206470092 U CN 206470092U CN 201720177174 U CN201720177174 U CN 201720177174U CN 206470092 U CN206470092 U CN 206470092U
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- flue gas
- boiler water
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- housing
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Abstract
The utility model is related to a kind of boiler water wall near wall region flue gas sampling device, the device is provided with housing, the inner chamber of housing is exhaust gases passes, exhaust gases passes both sides set gas approach and exhanst gas outlet respectively, the device is arranged in the heat-insulation layer of boiler water wall back-fire side, and the sample tap being adapted with gas approach is offered on boiler water wall fin, the water cooled wall back-fire side of gas approach is arranged on the sample tap, and is connected through the sample tap with boiler.Its beneficial effect produced is effectively to solve smoke sampling probe（Rifle）Scaling loss, blocking and smoke sampling pipeline blockage problem.
Description
Technical field
The utility model is related to a kind of coal-fired plant boiler water wall high temperature corrosion monitoring and Prevention Technique, and in particular to one
Coal-burning boiler burner hearth water-cooling wall near wall region flue gas sampling device is planted, belongs to electric power and power engineering technology field.
Background technology
In recent years, with increasingly strict, the particularly continuous improvement of thermal power plant's NOx emission standard, fire coal of environmental requirement
Power plant implements the transformation of NOx control technologies, and the mainstream technology used is low-NO_x combustion technology+SCR gas denitrifying technology.Boiler
Though strong reducing zone can reduce NOx discharge in the stove that low-NO_x combustion technology is organized the formation of, boiler water wall high temperature is exacerbated rotten
Erosion.Coal-fired power station boiler water wall high temperature corrosion is typical sulfide corrosion.Water-cooling wall wall temperature and its near wall region flue gas are oxygen-containing
Amount is to influence two key factors of high temperature corrosion.Under conditions of wall temperature setting, it is to alleviate to improve near wall region flue gas oxygen content
The effective way of water wall high temperature corrosion.The concentration of O2, CO and corrosive gas H2S in water-cooling wall near wall region flue gas are monitored, is
The premise of near wall region oxygen amount is improved, is also the basis for carrying out high temperature corrosion monitoring.
At present, for the monitoring of boiler water wall near wall region flue gas composition, domestic and international researcher has been presented for correlation technique
Scheme.Patent 200810236550.8 proposes a kind of apparatus and method for monitoring boiler water-cooling wall high-temperature corrosion on-line, including
Flue gas sampling pipe, flue gas analyzer, industrial computer, pyrometer couple, display.Pass through the perforate arrangement flue gas sampling on extended surface tube
Pipe, extracts by flue gas analyzer and measures CO, O2 and SO2 in flue gas, the water-cooling wall wall temperature measured with reference to pyrometer couple, warp
Industrial computer is handled using improved fuzzy AHP, obtains the weight size of current high temperature corrosion influence factor, and
Ranking results are included on display picture.Said apparatus flue gas sampling pipe is directly protruding into burner hearth, there is the risk of scaling loss,
On vapor clear and definite measure is not provided to the influence that SO2 is measured.
For the sampler blockage problem being related in solution technology, patent 2012100887830.3 proposes a kind of pot
Stove water wall high temperature corrosion atmosphere monitoring device.Auger is arranged inside by being popped one's head in smoke sampling, bulky grain is being prevented effectively from
While uncombusted coal dust and clinker enter smoke sampling probe, the fine grained that enter boiler condenser can also be passed through auger
Agitaion send burner hearth back to, significantly improve the reliability of high-temperature corrosion atmosphere continuous monitoring.But, the smoke sampling of the device
Probe stretches out sampling probe about 0~5mm, entered through fin panel casing, length about 5~10mm of exposed portion, one end of auger
Go the sampling probe and auger of burner hearth because no cooling there is scaling loss the problem of.In addition, auger be movable part easily by dust
Influence and leakage of wearing and tearing, operational reliability is high.
Monitoring water-cooling wall near wall region flue gas composition has great importance to preventing and administering water wall high temperature corrosion in real time
And value, but due to burner hearth inside smoke temperature height, complicated components, dustiness is big, water-cooling wall fin width is small, sampling difficulty etc.
Many reasons, cause current prior art to remain in the application in problems with：
（1）Smoke sampling is popped one's head in（Rifle, device）Easy scaling loss
Due to the reason such as fire box temperature is high, radiation heat transfer is strong, smoke sampling flow is small, cooling effect is poor, installed in water cooling
Smoke sampling probe on wall, the probe particularly stretched into inside burner hearth is easy to be burnt.Smoke sampling probe once burns
Damage, can cause poorly sealed, reveal, cause measurement result distortion.In addition, the probe distal end of scaling loss occurs melting and become
Shape, can cause front end sampling pipe blocking, and such block can not be solved using measures such as conventional blowbacks, cause system can not
Normal work.
（2）Smoke sampling mouthful and gas sampling probe Louis are blocked
Prior art generally opens the sampling mode that aperture extracts flue gas using fin.Because water-cooling wall fin size is small（One
As width<20mm）, open the general diameter in hole is smaller, be easy to by burner hearth in molten state uncombusted lime-ash block.In addition,
Because most technical filter devices are arranged in the smoke sampling pipeline away from sample tap certain distance, although system is equipped with anti-
Blowing apparatus, but smoke sampling pipeline is still particularly easy to blocking.
The content of the invention
The purpose of this utility model is can the effectively anticlogging nearly wall of boiler water wall there is provided one kind for above-mentioned deficiency
Area's flue gas sampling device.
To achieve the above object, the concrete technical scheme that the utility model is used is as follows：
A kind of boiler water wall near wall region flue gas sampling device, provided with housing, the inner chamber of housing is exhaust gases passes, and flue gas leads to
Road both sides set gas approach and exhanst gas outlet respectively, and the device is arranged in the heat-insulation layer of boiler water wall back-fire side, and
The sample tap being adapted with gas approach is offered on boiler water wall fin, the water cooled wall back-fire side of gas approach is arranged on should
On sample tap, and connected through the sample tap with boiler.
Further design of the present utility model is：
Filtrating smoke dust piece is additionally provided with exhaust gases passes, filtrating smoke dust piece is arranged between gas approach and exhanst gas outlet, cigarette
Dirt filter is flake porous filter core.
Gas approach is arranged on lower housing portion, and exhanst gas outlet is arranged on side body top corresponding thereto, and housing bottom surface is used
Along the acclivitous ramp structure of gas approach.
Exhaust gases passes bottom uses gradual-enlargement type structure with gas approach coupling part.Housing correspondence exhaust gases passes bottom and cigarette
Gas import connecting portion is in addition to the ramp structure of bottom, and remainder uses arcuate structure, and the arcuate structure and bottom bevel are common
Form the gradual-enlargement type structure of exhaust gases passes bottom.
In ensureing that bulky grain deposit can roll down to furnace chamber from inclined-plane, housing bottom surface is with water-cooling wall fin angle a
135°~170°。
Gas approach uses rectangular opening.
In order to which timing is cleaned to exhaust gases passes, compressed air interface, correspondence are provided with the top of exhanst gas outlet position
The compressed air interface accordingly sets depressed structure in shell, and the air outlet slit of the depressed structure is used for just to filtrating smoke dust piece
Filtrating smoke dust piece is purged during access compressed air.
Housing bottom is provided with blowback compressed air interface with gas approach position opposite side.Blowback contracting air interface is along shell
Body bottom surface slope direction extends and connects exhaust gases passes, for accessing compressed air, and housing bottom slope is purged.
In order to overhaul maintenance, the housing side is provided with access hole.
In order to ensure sampling precision, anti-locking apparatus is damaged at high temperature, and device is integrally provided in boiler insulation layer, and pot
Sample tap is opened up on stove water-cooling wall fin.
The utility model has the advantages that compared with prior art：
The utility model solves the easy scaling loss of smoke sampling probe, susceptible to plugging problem, and flue gas takes compared with prior art
Sample probe service life is long, and operational reliability is high.
1st, the utility model effectively solves smoke sampling probe（Rifle）Easy scaling loss, susceptible to plugging problem, this practicality are new
Smoke sampling mouth is designed as rectangle and non-circular hole on water-cooling wall fin in type, and on the one hand the design can down-sample resistance
（Water-cooling wall fin is strip, and width is minimum（Generally 7 ~ 12mm）, sample tap is designed as circle, it may appear that sampling resistance is big,
Easy blockage problem）, increase the amount of fume extraction；On the other hand single Coal Char Particles are also possible to prevent to block sample tap, prevented
Blocked when only sampling.
2nd, the utility model devises compressed air interface and access hole, can be periodically by pressure-air to gas approach
Blowback is carried out, the lime-ash around gas approach is removed；Hole can also be entered to flue gas by access hole to check.
3rd, sample tap is opened on adjacent two water screen tube fins in the utility model, designs very ingenious, and by flue gas
Sampler is placed at the back-fire side of water-cooling wall, and the design of the optimization can directly be radiated with avoiding device by furnace flame, effectively
The problem of solving sampling probe scaling loss, it is to avoid high temperature corrosion.Device is arranged in heat-insulation layer simultaneously, is carried out beneficial to sample gas
Insulation, effectively prevents that vapor is condensed before condenser is entered in sampling flue gas so that sampling blockage.
4th, the utility model effectively solves the exhaust gases passes in smoke sampling pipeline blockage problem, flue gas sampling device
Flaring form is designed as, flue gas flow rate is reduced in the smoke sampling passage of flaring form, big dust granules can occur nature and sink
Drop, is deposited on bottom.Flue gas sampling device lower case is more than 135 ° with the design of water-cooling wall fin angle so that be deposited on bottom
Bulky grain on housing can be slid back in burner hearth.It is regular alternatively, it is also possible to periodically be carried out by pressure-air to the flying dust of deposition
Blowback.
5th, the fine particle not settled in filtrating smoke dust piece, sampling flue gas is devised in flue gas sampling device can be more by sheet
Hole filter core capture, periodically thorax is melted down in the presence of the pressure-air of top by blowback.
Brief description of the drawings
Fig. 1 is water-cooling wall near wall region flue gas sampling device structural representation of the present utility model；
Fig. 2 is boiler water wall near wall region flue gas sampling device scheme of installation（Side view）；
Fig. 3 is stove water-cooling wall near wall region flue gas sampling device scheme of installation（Front view）；
Fig. 4 is boiler water wall near wall region flue gas sampling device and water-cooling wall fin connected mode schematic diagram.
In figure：1st, gas approach；2nd, housing；3rd, filtrating smoke dust piece；4th, compressed air interface；5th, exhanst gas outlet；6th, overhaul
Mouthful；7th, blowback compressed air interface；8th, exhaust gases passes；9th, fin panel casing；9a, water screen tube；9b, fin；10th, sample tap；
11st, boiler insulation layer.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Embodiment one：
As shown in figure 1, boiler water wall near wall region flue gas sampling device of the present utility model, installed in boiler water wall fin
In the back-fire side boiler insulation layer of piece, housing 2 is mainly provided with, housing 2 connects provided with gas approach 1, exhaust gases passes 8, compressed air
Mouth 4 and exhanst gas outlet 5, housing cavity are exhaust gases passes 8, and gas approach 1 and exhanst gas outlet 5 are respectively arranged on the two ends of exhaust gases passes 8,
Wherein gas approach 1 is rectangular opening, is arranged on the bottom of housing 2, exhanst gas outlet 5 is arranged on the upper end of housing 2, and is located at
The position opposite side of gas approach 1.The device is arranged in the heat-insulation layer on the outside of boiler water wall, and on boiler water wall fin
The sample tap 10 being adapted with gas approach 1 is offered, gas approach 1 is welded on sample tap 10 via water-cooling wall back-fire side,
And connected by the sample tap 10 with boiler internal.To down-sample resistance, gas approach uses rectangular opening.
Upper end in exhaust gases passes 8 is provided with filtrating smoke dust piece 3 close to the position of exhanst gas outlet 4, and filtrating smoke dust piece 3 is fixed on
In inner walls, and ambient junction keeps sealing.The filtrating smoke dust piece 3 is flake porous filter core.
During the present apparatus is in order to ensure that bulky grain deposit can roll down to furnace chamber from inclined-plane, housing bottom surface uses to enter along flue gas
The acclivitous ramp structure of mouth, it is 135 ° ~ 170 ° to be commonly designed housing bottom surface with water-cooling wall fin angle a.
In order to ensure that sampling is unobstructed, exhaust gases passes bottom uses gradual-enlargement type structure with gas approach coupling part.（Usual cigarette
Gas passage 8 is vertically arranged, and gas approach 1 is horizontally disposed with exhanst gas outlet 4 and perpendicular to fin, housing correspondence exhaust gases passes and cigarette
A changeover portion is provided between gas import, the changeover portion is in addition to the ramp structure of bottom, and remainder uses arcuate structure, the arc
Structure is collectively forming the gradual-enlargement type structure of exhaust gases passes bottom with bottom bevel.）
In order to which timing is cleaned to exhaust gases passes, compressed air interface 4 is provided with the top of the position of exhanst gas outlet 1, it is right
Depressed structure should be set in the housing of the position of compressed air interface 4, the air outlet slit of depressed structure is just to filtrating smoke dust piece
3, filtrating smoke dust piece 3 is purged during compressed air for accessing, depressed structure can use the AND DEWATERING FOR ORIFICE STRUCTURE of multiple stomatas.
Housing bottom is provided with blowback compressed air interface 7, the edge of blowback contracting air interface 7 with the position opposite side of gas approach 1
Housing bottom surface slope direction to extend and connect exhaust gases passes, for accessing compressed air, housing bottom slope is blown
Sweep.
Being additionally provided with one in housing side simultaneously is used for the access hole 6 of mainteinance repair, and access hole 6 is protected when device is used
Hold sealing.
Embodiment two：
In this example, housing bottom surface uses planar structure, and a mistake is provided between housing correspondence exhaust gases passes and gas approach
Section is crossed, the changeover portion adopts the changeover portion in addition to the planar structure of bottom, and remainder uses arcuate structure, the arcuate structure and bottom
Facial planes is collectively forming the gradual-enlargement type structure of exhaust gases passes bottom.Remainder be the same as Example one.
Embodiment three：In this example, housing bottom surface uses planar structure, and gas approach is horizontally disposed with exhanst gas outlet, and
It is set directly at exhaust gases passes both sides, does not form the gradual-enlargement type structure of exhaust gases passes bottom.Remainder be the same as Example one.
Application example one：
Such as Fig. 2, shown in Fig. 3, boiler water wall near wall region flue gas sampling device of the present utility model is integrally attached to boiler
Heat-insulation layer 11 in, and the rectangle being adapted with gas approach 1 is opened on fin 9b between adjacent two water screen tube of boiler
Sample tap 10, such as Fig. 3.High 50~the 200mm of sample tap 10, width is the 50~80% of fin width, and by gas approach 1 with taking
Sample mouthful 10 is connected by way of full weld, makes to keep sealing, gas approach 1, sample tap between gas approach 1 and sample tap 10
10th, compressed air interface 4, exhanst gas outlet 5, access hole 6 and blowback compressed air interface 7 are horizontally disposed, and they are perpendicular to fin
Piece is set.Simultaneously in order to prevent high temperature scaling loss, the gas approach 1 of the device is welded on above-mentioned sample tap 10, as shown in Figure 4.
In actual use, the exhanst gas outlet 5 of flue gas sampling device is passed through into smoke sampling joint and required cigarette first
Gas probe tube is connected, and the air intlet of compressed air interface is connected by compressed air joint with compressed air hose, and access hole is protected
Hold sealing.
After the completion of connection, start sampling process, during sampling, boiler water wall near wall region flue gas leads in the presence of sampling pump
Cross gas approach 1 to enter in exhaust gases passes 8, because the gradual-enlargement type of exhaust gases passes 8 is designed, the cross section of exhaust gases passes 8 gradually increases
Greatly, flow velocity of the flue gas in exhaust gases passes 8 is gradually reduced, the bulky grain natural subsidence in flue gas to the bottom of exhaust gases passes 8, by
138 ° are used in the inclined bottom surface of housing 2 and with the design of water-cooling wall fin angle, it is ensured that bulky grain dust can pass through bottom surface
Slope glide fall into again in boiler furnace chamber, remaining fine dusts are then caught by the flake porous filter core in flue gas sampling device
Catch；Flue gas after removing dust then enters gas sampling probe by exhanst gas outlet 5.
After the completion of sampling, high pressure sky is imported by being arranged on the air pressure channel of gas approach and outlet port respectively
Gas, carries out blowback cleaning to the dust deposited on the slope of exhaust gases passes and in filtrating smoke dust piece, it is fallen into furnace chamber.Such as
There is the dust that compressed air can not also be cleaned in fruit, then can open side sealedly access hole, carry out manual handle, protect at any time
The cleaning in exhaust gases passes is held, the problem of exhaust gases passes are blocked can be effectively avoided.
Claims (10)
1. a kind of boiler water wall near wall region flue gas sampling device, provided with housing, the inner chamber of housing is exhaust gases passes, exhaust gases passes
Both sides set gas approach and exhanst gas outlet respectively, it is characterized in that：The device is arranged on the heat-insulation layer of boiler water wall back-fire side
In, and the sample tap being adapted with gas approach, the water cooled wall back-fire side of gas approach are offered on boiler water wall fin
Connected on the sample tap, and through the sample tap with boiler.
2. boiler water wall near wall region flue gas sampling device according to claim 1, it is characterized in that：Also set in exhaust gases passes
There is filtrating smoke dust piece, filtrating smoke dust piece is arranged between gas approach and exhanst gas outlet.
3. boiler water wall near wall region flue gas sampling device according to claim 2, it is characterized in that：The filtrating smoke dust piece
For flake porous filter core.
4. boiler water wall near wall region flue gas sampling device according to claim 2, it is characterized in that：Gas approach is arranged on
Lower housing portion, exhanst gas outlet is arranged on side body top corresponding thereto, and housing bottom surface uses acclivitous along gas approach
Ramp structure.
5. boiler water wall near wall region flue gas sampling device according to claim 4, it is characterized in that：Exhaust gases passes bottom with
Gas approach coupling part uses gradual-enlargement type structure.
6. boiler water wall near wall region flue gas sampling device according to claim 4, it is characterized in that：The housing bottom surface with
Water-cooling wall fin angle a is 135 ° ~ 170 °.
7. boiler water wall near wall region flue gas sampling device according to claim 5, it is characterized in that：Gas approach uses square
Shape mouthful.
8. according to any described boiler water wall near wall region flue gas sampling devices of claim 1-7, it is characterized in that：Go out in flue gas
The top of mouthful position is provided with compressed air interface, to should compressed air interface accordingly depressed structure is set in shell, the equal gas
The air outlet slit of structure just to filtrating smoke dust piece, is purged for accessing during compressed air to filtrating smoke dust piece.
9. boiler water wall near wall region flue gas sampling device according to claim 8, it is characterized in that：Housing bottom and flue gas
Entrance location opposite side is provided with blowback compressed air interface.
10. boiler water wall near wall region flue gas sampling device according to claim 9, it is characterized in that：On the housing also
Provided with access hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720177174.4U CN206470092U (en) | 2017-02-27 | 2017-02-27 | Boiler water wall near wall region flue gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720177174.4U CN206470092U (en) | 2017-02-27 | 2017-02-27 | Boiler water wall near wall region flue gas sampling device |
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| Publication Number | Publication Date |
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| CN206470092U true CN206470092U (en) | 2017-09-05 |
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ID=59713346
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720177174.4U Active CN206470092U (en) | 2017-02-27 | 2017-02-27 | Boiler water wall near wall region flue gas sampling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644613A (en) * | 2017-02-27 | 2017-05-10 | 国电科学技术研究院 | Sampling device for flue gas in close-to-wall zone of boiler water wall |
| CN109507224A (en) * | 2018-12-07 | 2019-03-22 | 谭丽娟 | A kind of building materials volatility detection method |
-
2017
- 2017-02-27 CN CN201720177174.4U patent/CN206470092U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644613A (en) * | 2017-02-27 | 2017-05-10 | 国电科学技术研究院 | Sampling device for flue gas in close-to-wall zone of boiler water wall |
| CN106644613B (en) * | 2017-02-27 | 2023-09-19 | 国电科学技术研究院有限公司 | Smoke sampling device for near-wall area of water-cooled wall of boiler |
| CN109507224A (en) * | 2018-12-07 | 2019-03-22 | 谭丽娟 | A kind of building materials volatility detection method |
| CN109507224B (en) * | 2018-12-07 | 2021-04-02 | 苏州市相城检测股份有限公司 | Building material volatility detection method |
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Address after: 210046 Qixia, Jiangsu Province, Wonderland Road, No. 10, Co-patentee after: Guodian Nanjing electric power test & Research Co., Ltd. Patentee after: National Electric Science and Technology Research Institute Co., Ltd. Address before: 210046 Qixia, Jiangsu Province, Wonderland Road, No. 10, Co-patentee before: Nanjing Power Equipment Quality & Performance Test Center Patentee before: Guodian Science and Technology Research Institute |