CN206944214U - A kind of air preheater anti-blocking system using SCR boilers - Google Patents
A kind of air preheater anti-blocking system using SCR boilers Download PDFInfo
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- CN206944214U CN206944214U CN201720806319.2U CN201720806319U CN206944214U CN 206944214 U CN206944214 U CN 206944214U CN 201720806319 U CN201720806319 U CN 201720806319U CN 206944214 U CN206944214 U CN 206944214U
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- flue
- blocking
- powder feed
- scr
- air preheater
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Abstract
The utility model provides a kind of air preheater anti-blocking system using SCR boilers, and it includes：It is arranged on flue and positioned at the first dusting device, the second dusting device and the 3rd dusting device in air preheater downstream, is separately positioned between first dusting device and second dusting device, three filters between second dusting device and the 3rd dusting device and the 3rd dusting device downstream along flue gas outflow direction.The utility model provides a kind of SCR boilers air preheater anti-blocking system, and it can effectively reduce the generation of ammonium hydrogen sulfate solidfied material, so as to realize the anti-blocking purpose of air preheater.
Description
Technical field
The utility model belongs to field of boilers, more particularly to a kind of air preheater anti-blocking system using SCR boilers.
Background technology
At present in the industrial production, in order to reduce NOx, generally using SCR.And in combustion, the S in coal has part
SO can be converted into3（Including SO2Sulphate decomposition discharges in oxidation, coal）, SCR catalyst is to SO2Catalysis oxidation, cause to escape
The NH of ease3With SO3Combine to form NH4HSO4、(NH4)2SO4, and NH4HSO4250OC or so starts to solidify, and causes downstream empty pre-
Device blocks.
To prevent the blocking of air preheater it is necessary to prevent NH4HSO4、(NH4)2SO4Generation, can start with terms of two,
One kind is to reduce NH3Concentration, but this is difficult, because when spraying into NH3 before SCR and being mixed in flue gas, in flue gas
Through SO3 caused by burning, so as to initially form NH4HSO4、(NH4)2SO4, and the NH in SCR3During for denitration,
Catalyst promotes SO2 and is converted into SO3, if now there is a small amount of NH3 escapes, certainty and SO3 combination shapes caused by SCR catalysis
Into NH4HSO4、(NH4)2SO4, therefore attempt to reduce NH3Escape is difficult to be realized in engineering to reduce the generation of its sulfate to be
, another kind is the concentration for reducing SO3.
Utility model content
One kind is provided and uses SCR according to these purposes of the present utility model and further advantage, the utility model in order to realize
The air preheater anti-blocking system of boiler, it includes：
It is arranged on flue and the first dusting device positioned at air preheater upstream, second dusts dress along flue gas outflow direction
Put includes the anti-blocking powder feed hopper connected with the flue and is arranged on described with the 3rd dusting device, first dusting device
Air blower on flue lateral wall, the air blower are arranged on the lower section of the anti-blocking powder feed hopper, and its air outlet is arranged on cigarette
The air-out direction and flow of flue gas of road inside and the air blower are in opposite direction, and second dusting device is described including being arranged on
Some first jets of flue sidewall and the first anti-blocking powder feed pipe connected with the first jet, the 3rd dusting device
Including the second anti-blocking powder feed pipe for being arranged on some second nozzles of the flue sidewall and being connected with the second nozzle；
It is separately positioned between first dusting device and second dusting device, second dusting device and institute
State three filters between the 3rd dusting device and the 3rd dusting device downstream, each filter bag
Filter and the screen pack being arranged in the flue are included, the madial wall of the flue is provided with annular boss, the screen pack
External diameter be more than the internal diameter of the annular boss, and the screen pack is ridden upon on the annular boss.
Preferably, in described SCR boiler air preheater anti-blocking systems,
Some first jets are uniformly distributed in the flue sidewall；
Some second nozzles are uniformly distributed in the flue sidewall.
Preferably, in described SCR boiler air preheater anti-blocking systems,
Distribution density of the first jet on the flue is more than distribution of the second nozzle on the flue
Density；
The nozzle diameter of the first jet is more than the nozzle diameter of the second nozzle.
Preferably, in described SCR boiler air preheater anti-blocking systems,
Scale is provided with the anti-blocking powder feed hopper, and the bottom of the anti-blocking powder feed hopper is provided with the first valve；
The second valve and the 3rd are respectively arranged with the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe
Valve.
Preferably, in described SCR boiler air preheater anti-blocking systems,
The anti-blocking powder feed hopper, the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe are external to anti-blocking
Powder storage tank, potassium carbonate powder is placed with the anti-blocking powder storage tank.
Preferably, in described SCR boiler air preheater anti-blocking systems,
Pump is provided with the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe.
Preferably, in described SCR boiler air preheater anti-blocking systems,
The filter is arranged on the screen pack and the external diameter of the filter is equal to the internal diameter of the boiler flue；
Outflow direction of the mesh diameter of the screen pack of three filters along flue gas is gradually reduced.
Preferably, in described SCR boiler air preheater anti-blocking systems,
Valve is offered on the flue sidewall of the filter side, the valve is provided with the axle being connected with flue outer wall
And the switch that can be locked with flue lateral wall；The edge of the valve is provided with sealing strip；The axle of the valve and the cigarette
Road lateral wall pivot joint, the switch of the valve are fixed by latching with the flue.
The utility model provides a kind of air preheater anti-blocking system using SCR boilers, and it can effectively reduce ammonium hydrogen sulfate
The generation of solidfied material, so as to realize the anti-blocking purpose of air preheater.
Further advantage, target and feature of the present utility model embody part by following explanation, and part will also pass through
Research of the present utility model and practice are understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is a kind of knot of one embodiment of air preheater anti-blocking system using SCR boilers provided by the utility model
Structure schematic diagram.
In the figures above：1st, anti-blocking powder feed hopper；2nd, air blower；3rd, first jet；4th, the first anti-blocking powder feed pipe；5th,
Two nozzles；6th, the second anti-blocking powder feed pipe；7th, screen pack；8th, annular boss；9th, the first valve；10th, the second valve；11st, the 3rd
Valve；12nd, anti-blocking powder storage tank；13rd, pump；14th, filter；15th, valve.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to explanation
Book word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
As shown in figure 1, the utility model provides a kind of air preheater anti-blocking system using SCR boilers, it includes：
It is arranged on flue and the first dusting device positioned at air preheater upstream, second dusts dress along flue gas outflow direction
Put includes the anti-blocking powder feed hopper 1 connected with the flue and is arranged on institute with the 3rd dusting device, first dusting device
The air blower 2 on flue lateral wall is stated, the air blower 2 is arranged on the lower section of the anti-blocking powder feed hopper 1, and its air outlet is set
Inside flue and the air-out direction of the air blower 2 and flow of flue gas are in opposite direction, and second dusting device includes setting
Some first jets 3 and the first anti-blocking powder feed pipe 4 for being connected with the first jet 3 in the flue sidewall, described
Three dusting devices include be arranged on the flue sidewall some second nozzles 5 and connect with the second nozzle 5 second prevent
Stifled powder feed pipe 6；
It is separately positioned between first dusting device and second dusting device, second dusting device and institute
State three filters between the 3rd dusting device and the 3rd dusting device downstream, each filter bag
Filter 14 and the screen pack 7 being arranged in the flue are included, the madial wall of the flue is provided with annular boss 8, the mistake
The external diameter of filter screen 7 is more than the internal diameter of the annular boss 8, and the screen pack 7 is ridden upon on the annular boss 8.
Some first jets 3 are uniformly distributed in the flue sidewall；
Some second nozzles 5 are uniformly distributed in the flue sidewall.
Distribution density of the first jet 3 on the flue is more than point of the second nozzle 5 on the flue
Cloth density；
The nozzle diameter of the first jet 3 is more than the nozzle diameter of the second nozzle 5.
Scale is provided with the anti-blocking powder feed hopper 1, and the bottom of the anti-blocking powder feed hopper 1 is provided with the first valve
9；
The He of the second valve 10 is respectively arranged with the first anti-blocking powder feed pipe 4 and the second anti-blocking powder feed pipe 6
3rd valve 11.
The anti-blocking powder feed hopper 1, the first anti-blocking powder feed pipe 4 and the second anti-blocking powder feed pipe 6 are external to
Anti-blocking powder storage tank 12, potassium carbonate powder is placed with the anti-blocking powder storage tank 12.
Pump 13 is provided with the first anti-blocking powder feed pipe 4 and the second anti-blocking powder feed pipe 6.
The filter 14 is arranged on the screen pack 7 and the external diameter of the filter 14 is equal to the boiler flue
Internal diameter；
Outflow direction of the mesh diameter of the screen pack 7 of three filters along flue gas is gradually reduced.
Valve 15 is offered on the flue sidewall of the side of filter 14,
The valve 15 is provided with the axle being connected with flue outer wall and the switch that can be locked with flue lateral wall；
The edge of the valve 15 is provided with sealing strip；
The axle of the valve 15 is pivotally connected with the flue lateral wall, and the switch of the valve 15 passes through lock and the flue
It is fixed.
Although embodiment of the present utility model is disclosed as above, it is not restricted in specification and embodiment
Listed utilization, it can be applied to various suitable fields of the present utility model completely, for those skilled in the art,
Other modification is easily achieved, therefore under the universal limited without departing substantially from claim and equivalency range, this reality
Specific details is not limited to new and shown here as the legend with description.
Claims (8)
- A kind of 1. air preheater anti-blocking system using SCR boilers, it is characterised in that including：It is arranged on along flue gas outflow direction On flue and positioned at the first dusting device, the second dusting device and the 3rd dusting device of air preheater upstream, described first dusts Device includes the anti-blocking powder feed hopper connected with the flue and the air blower being arranged on the flue lateral wall, the air blast Machine is arranged on the lower section of the anti-blocking powder feed hopper, its air outlet be arranged on inside flue and the air-out direction of the air blower with Flow of flue gas is in opposite direction, second dusting device include be arranged on the flue sidewall some first jets and with it is described First anti-blocking powder feed pipe of first jet connection, the 3rd dusting device include be arranged on the flue sidewall some the Two nozzles and the second anti-blocking powder feed pipe connected with the second nozzle；It is separately positioned between first dusting device and second dusting device, second dusting device and described Three filters between three dusting devices and the 3rd dusting device downstream, each filter included Filter and the screen pack being arranged in the flue, the madial wall of the flue are provided with annular boss, the screen pack it is outer Footpath is more than the internal diameter of the annular boss, and the screen pack is ridden upon on the annular boss.
- A kind of 2. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatSome first jets are uniformly distributed in the flue sidewall；Some second nozzles are uniformly distributed in the flue sidewall.
- A kind of 3. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatDistribution density of the first jet on the flue is more than distribution density of the second nozzle on the flue；The nozzle diameter of the first jet is more than the nozzle diameter of the second nozzle.
- A kind of 4. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatScale is provided with the anti-blocking powder feed hopper, and the bottom of the anti-blocking powder feed hopper is provided with the first valve；The second valve and the 3rd valve are respectively arranged with the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe.
- A kind of 5. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatThe anti-blocking powder feed hopper, the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe are external to anti-blocking powder storage Batch can, potassium carbonate powder is placed with the anti-blocking powder storage tank.
- A kind of 6. air preheater anti-blocking system using SCR boilers according to claim 5, it is characterised in thatPump is provided with the first anti-blocking powder feed pipe and the second anti-blocking powder feed pipe.
- A kind of 7. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatThe filter is arranged on the screen pack and the external diameter of the filter is equal to the internal diameter of the boiler flue；Outflow direction of the mesh diameter of the screen pack of three filters along flue gas is gradually reduced.
- A kind of 8. air preheater anti-blocking system using SCR boilers according to claim 1, it is characterised in thatOffer valve on the flue sidewall of the filter side, the valve be provided with the axle that is connected with flue outer wall and The switch that can be locked with flue lateral wall；The edge of the valve is provided with sealing strip；Outside the axle of the valve and the flue Side wall is pivotally connected, and the switch of the valve is fixed by latching with the flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720806319.2U CN206944214U (en) | 2017-07-05 | 2017-07-05 | A kind of air preheater anti-blocking system using SCR boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720806319.2U CN206944214U (en) | 2017-07-05 | 2017-07-05 | A kind of air preheater anti-blocking system using SCR boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206944214U true CN206944214U (en) | 2018-01-30 |
Family
ID=61367839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720806319.2U Expired - Fee Related CN206944214U (en) | 2017-07-05 | 2017-07-05 | A kind of air preheater anti-blocking system using SCR boilers |
Country Status (1)
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|---|---|
| CN (1) | CN206944214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659308A (en) * | 2019-03-06 | 2020-09-15 | Sk新技术株式会社 | Powder conveying hopper with air purging function |
-
2017
- 2017-07-05 CN CN201720806319.2U patent/CN206944214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659308A (en) * | 2019-03-06 | 2020-09-15 | Sk新技术株式会社 | Powder conveying hopper with air purging function |
| CN111659308B (en) * | 2019-03-06 | 2024-03-08 | Sk新能源株式会社 | Powder delivery hopper including air purge |
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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: 20180130 Termination date: 20190705 |
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| CF01 | Termination of patent right due to non-payment of annual fee |