CN211345388U - Device for cleaning ammonium bisulfate condensed in rotary air preheater - Google Patents
Device for cleaning ammonium bisulfate condensed in rotary air preheater Download PDFInfo
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- CN211345388U CN211345388U CN201922176814.1U CN201922176814U CN211345388U CN 211345388 U CN211345388 U CN 211345388U CN 201922176814 U CN201922176814 U CN 201922176814U CN 211345388 U CN211345388 U CN 211345388U
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- 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
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Abstract
The utility model provides a device of ammonium bisulfate condenses in clearance rotation air preheater that online cleaning treatment is effectual and practice thrift the efficiency. The device for cleaning ammonium bisulfate condensed in the rotary air preheater comprises a hot air recirculation cleaning component arranged on the side part of the rotary air preheater and used for communicating the hot end of the air side of the rotary air preheater with the cold end of a secondary air bin on the air side of the rotary air preheater and a high-pressure water online cleaning component arranged at the bottom of the cold end of the smoke side of the rotary air preheater, wherein the hot air recirculation cleaning component comprises a hot air combined circulation pipe, a fan, an air quantity adjusting part and a hot air blowing pipe, the hot air combined circulation pipe is communicated with the hot end of the air side of the rotary air preheater and the fan, the hot air blowing pipe is communicated with the fan and the cold end of the secondary air bin on the air side of the rotary air preheater, and the air quantity adjusting part is arranged on the hot. The utility model discloses can prevent ammonium bisulfate's condensation and the air preheater heat transfer element that causes corrodes and blocks up, reduces the coal-fired volume, reduces fuel cost.
Description
Technical Field
The utility model relates to an air preheater cleaning device, in particular to device of ammonium bisulfate condenses in clearance rotation air preheater.
Background
With the coming of more and more strict environmental protection policies of the country, the flue gas emission of power plant equipment must reach the ultra-clean standard. The SCR (selective catalytic reduction) flue gas denitration technology is a mainstream technical route for controlling flue gas NOx emission of domestic power plants, particularly coal-fired power plants. The SCR flue gas denitration system generally has the problems of excessive ammonia spraying and high ammonia escape, the escaped ammonia and sulfur trioxide in the flue gas generate ammonium bisulfate, and the ammonium bisulfate is condensed at the temperature of 150-210 ℃.
In the boiler flue gas air system, the middle lower part of the air preheater is just in the temperature area. Therefore, a large amount of ammonium bisulfate can be condensed on the surfaces of the heat transfer elements of the air preheater, particularly in the middle and low temperature sections of the air preheater. The acidic ammonium bisulfate has stronger corrosion effect on heat transfer elements of the air preheater, so that the service life of the air preheater is greatly shortened; more seriously, the condensed ammonium bisulfate can adhere to fly ash in flue gas to block the gaps of heat transfer elements of the air preheater, so that the resistance of the air preheater is greatly increased, the energy consumption of a fan is increased, and the blockage of the air preheater is more and more serious along with the increase of the running time until the furnace is shut down for maintenance.
Therefore, how to remove ammonium bisulfate in the air preheater, particularly the rotary air preheater, has been a research topic of great attention in the field. In the prior art, a high-pressure water online washing system is arranged at the bottom of a cold end of a rotary air preheater and used for washing accumulated dust and ammonium bisulfate scales in the rotary air preheater on line, but the online cleaning effect is greatly reduced due to the influence of conditions such as high-temperature vaporization and flue gas turbulence during online cleaning.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device of ammonium bisulfate condenses in clearance rotation air preheater that online cleaning treatment is effectual and practice thrift the efficiency, solve the background art in.
The utility model provides a technical scheme that its technical problem adopted is:
a device for cleaning ammonium bisulfate condensed in a rotary air preheater comprises a hot air recirculation cleaning component which is arranged at the side part of the rotary air preheater and is used for communicating the hot end at the air side of the rotary air preheater with the cold end of a secondary air bin at the air side of the rotary air preheater and a high-pressure water online cleaning component which is arranged at the bottom of the cold end at the smoke side of the rotary air preheater, the hot air recycling cleaning assembly comprises a hot air combined circulating pipe, a fan, an air quantity adjusting part and a hot air blowing pipe, the hot air combined circulating pipe is communicated with the hot end of the air side of the rotary air preheater and the fan, the hot air blowing pipe is communicated with the fan and the cold end of the secondary air bin of the air side of the rotary air preheater, the air quantity adjusting part is arranged on the hot air blowing pipe, the included angle between the soot blowing end of the hot air soot blowing pipe and the central line of the fan-shaped plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the radial surface of the rotary air preheater is 5-15 degrees.
Preferably, the hot air combined circulating pipe comprises a hot air primary air circulating pipe and a hot air secondary air circulating pipe, the hot air primary air circulating pipe is communicated with the hot end of the primary air bin at the air side of the rotary air preheater and the fan, and the hot air secondary air circulating pipe is communicated with the hot end of the secondary air bin at the air side of the rotary air preheater and the fan. The hot end of the primary air bin of the rotary air preheater has larger air pressure, hot air can be directly led into the hot air combined circulation pipe to reach the fan, and simultaneously, in order to increase the hot air quantity, the fan is used for synchronously leading hot air into the hot end of the secondary air bin of the rotary air preheater to form combined circulation of the hot primary air and the hot secondary air.
Preferably, the included angle between the soot blowing end of the hot air soot blowing pipe and the central line of the fan-shaped plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the axial surface of the rotary air preheater is 0-15 degrees.
Preferably, the air volume adjusting member is an adjusting valve.
Preferably, the high-pressure water online cleaning assembly comprises a driving motor, a high-pressure gun body, a telescopic gun barrel and a nozzle, the telescopic gun barrel is arranged on the high-pressure gun body, the driving motor is connected with the telescopic gun barrel through the high-pressure gun body, and the nozzle is arranged on the telescopic gun barrel.
Preferably, the cleaning medium of the high-pressure water online cleaning component is high-pressure water with the pressure of at least 20 MPa.
The utility model has the advantages that:
the utility model discloses a device of ammonium bisulfate condenses in clearance rotation air preheater, combine high pressure water on-line cleaning and hot air recycling, evaporate the ammonium bisulfate that condenses in the heat transfer element surface with hot air recycling's mode, make it easily washed by high pressure water on-line cleaning subassembly, improve the cleaning effect, because high pressure water on-line cleaning and hot air recycling's combined action, can use the same water pressure with off-line cleaning to reach better on-line cleaning effect, and what hot air recycling subassembly introduced is the hot-blast in rotation air preheater air side hot junction, the energy consumption has been practiced thrift. The device can prevent ammonium bisulfate condensation and the air preheater heat transfer element that causes corrodes and blocks up, has avoided the reduction of boiler exhaust gas temperature and air draught fan energy consumption, and then effectively improves boiler efficiency, reduces the coal-fired volume, reduces fuel cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic structural view of the hot air recirculation cleaning assembly of the present invention;
FIG. 3 is a schematic view of the radial layout of the hot air blowing pipe of the present invention;
FIG. 4 is a schematic view of the axial layout of the hot air blowing pipe of the present invention;
fig. 5 is a schematic structural diagram of the high-pressure water online cleaning assembly of the present invention.
In the figure: 1. the device comprises a hot air recycling cleaning assembly, a high-pressure water online cleaning assembly, a rotary air preheater, a rotary.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings. It is to be understood that the practice of the present invention is not limited to the following examples, and that any modifications and/or changes in form made to the present invention are intended to fall within the scope of the present invention.
In the utility model, all parts and percentages are weight units, and the adopted equipment, raw materials and the like can be purchased from the market or commonly used in the field if not specified. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.
Example (b):
the device for cleaning ammonium bisulfate condensed in the rotary air preheater shown in fig. 1 comprises a hot air recirculation cleaning component 1 arranged on the side part of the rotary air preheater and used for communicating the hot end of the air side of the rotary air preheater with the cold end of a secondary air bin on the air side of the rotary air preheater and a high-pressure water online cleaning component 2 arranged at the bottom of the cold end of the smoke side of the rotary air preheater. A smoke side 4 and an air side 5 are arranged in the rotary air preheater 3, the smoke side and the air side are separated by a fan-shaped plate 6 to form an independent circulation channel of the smoke side and the air side, and the air side comprises a primary air bin 7 and a secondary air bin 8.
As shown in fig. 2, the hot air recirculation cleaning assembly includes a hot air circulation pipe, a blower 101, an air volume adjusting part 102 and a hot air blowing pipe 103, the hot air circulation pipe is communicated with the hot air side end of the rotary air preheater and the blower, the hot air blowing pipe is communicated with the blower and the cold end of the secondary air bin at the air side of the rotary air preheater, the air volume adjusting part is arranged on the hot air blowing pipe, and the air volume adjusting part is an adjusting valve.
The hot air combined circulating pipe comprises a hot air primary air circulating pipe 104 and a hot air secondary air circulating pipe 105. The hot air primary air circulating pipe is communicated with the hot end of the primary air bin at the air side of the rotary air preheater and the fan, and the hot air secondary air circulating pipe is communicated with the hot end of the secondary air bin at the air side of the rotary air preheater and the fan. The hot end of the primary air bin of the rotary air preheater has larger air pressure, hot air can be directly led into the hot air combined circulation pipe to reach the fan, and simultaneously, in order to increase the hot air quantity, the fan is used for synchronously leading hot air at the hot end of the secondary air bin of the rotary air preheater into the hot air, so that the combined circulation of the hot primary air and the hot secondary air is formed, and the energy consumption is saved.
As shown in FIG. 3, the included angle A between the soot blowing end of the hot air soot blowing pipe and the central line of the sector plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the radial surface of the rotary air preheater is 5-15 degrees. In the area of the section, the temperature of the cold end heat exchange element of the rotary air preheater on the motion path in the whole rotary air preheater is the lowest, because the cold end heat exchange element just finishes the heat transfer work of the air side secondary air bin and rotates to the smoke side. Therefore, the deposition position of the ammonium bisulfate in the section area is higher, and the high-pressure water online cleaning assembly can hardly achieve the cleaning effect in the section area. And the hot air direct blowing evaporation effect of the hot air soot blowing pipe in the area can make the deposition position of the ammonium bisulfate move downwards, thereby being convenient for the washing of the high-pressure water online cleaning assembly.
As shown in fig. 4, an included angle B between the soot blowing end of the hot air soot blowing pipe and the central line of the sector plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the axial surface of the rotary air preheater is 0-15 °. The soot blowing end of the hot air soot blowing pipe obliquely blows soot at the cold end of the rotary air preheater at a certain inclination angle, so that the diffusion effect of hot air at the cold end is better.
As shown in fig. 5, the high pressure water online cleaning assembly includes a driving motor 201, a high pressure gun body 202, a telescopic gun barrel 203 and a nozzle 204, the telescopic gun barrel is disposed on the high pressure gun body, the driving motor is connected with the telescopic gun barrel through the high pressure gun body and can drive the telescopic gun barrel to move telescopically along the high pressure gun body, and the nozzle is disposed on the telescopic gun barrel. When the rotary air preheater is in a working state, the telescopic gun barrel extends into the rotary air preheater under the driving of the driving motor, and when the rotary air preheater is in a non-working state, the telescopic gun barrel can be withdrawn from the rotary air preheater, so that the accessories can be conveniently overhauled or replaced.
The cleaning medium of the high-pressure water online cleaning component is high-pressure water with the pressure of at least 20 MPa. In the prior art, the off-line cleaning generally adopts high-pressure water of 20MPa, while the on-line cleaning is influenced by high-temperature vaporization, and the water pressure is increased to 30MPa to ensure the cleaning effect. The cleaning device of the embodiment benefits from the evaporation effect of the hot air recycling cleaning component on the ammonium bisulfate, the expected online cleaning effect can be achieved by adopting high-pressure water with the pressure above 20MPa, and the energy consumption can be saved.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (6)
1. The utility model provides a device of ammonium bisulfate condenses in clearance rotation air preheater which characterized in that: the device for cleaning the ammonium bisulfate condensed in the rotary air preheater comprises a hot air recycling cleaning component which is arranged on the side part of the rotary air preheater and is used for communicating the hot end of the air side of the rotary air preheater with the cold end of a secondary air bin on the air side of the rotary air preheater and a high-pressure water online cleaning component which is arranged at the bottom of the cold end on the smoke side of the rotary air preheater, the hot air recycling cleaning assembly comprises a hot air combined circulating pipe, a fan, an air quantity adjusting part and a hot air blowing pipe, the hot air combined circulating pipe is communicated with the hot end of the air side of the rotary air preheater and the fan, the hot air blowing pipe is communicated with the fan and the cold end of the secondary air bin of the air side of the rotary air preheater, the air quantity adjusting part is arranged on the hot air blowing pipe, the included angle between the soot blowing end of the hot air soot blowing pipe and the central line of the fan-shaped plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the radial surface of the rotary air preheater is 5-15 degrees.
2. The device for cleaning the condensed ammonium bisulfate in the rotary air preheater as recited in claim 1, wherein: the hot air combined circulating pipe comprises a hot air primary air circulating pipe and a hot air secondary air circulating pipe, the hot air primary air circulating pipe is communicated with the hot end of the primary air bin at the air side of the rotary air preheater and the fan, and the hot air secondary air circulating pipe is communicated with the hot end of the secondary air bin at the air side of the rotary air preheater and the fan.
3. The device for cleaning the condensed ammonium bisulfate in the rotary air preheater as recited in claim 1, wherein: the included angle between the soot blowing end of the hot air soot blowing pipe and the central line of the fan-shaped plate at the cold end of the secondary air bin at the air side of the rotary air preheater on the axial surface of the rotary air preheater is 0-15 degrees.
4. The device for cleaning the condensed ammonium bisulfate in the rotary air preheater as recited in claim 1, wherein: the air quantity regulating component is a regulating valve.
5. The device for cleaning the condensed ammonium bisulfate in the rotary air preheater as recited in claim 1, wherein: the high-pressure water online cleaning assembly comprises a driving motor, a high-pressure gun body, a telescopic gun barrel and a nozzle, the telescopic gun barrel is arranged on the high-pressure gun body, the driving motor is connected with the telescopic gun barrel through the high-pressure gun body, and the nozzle is arranged on the telescopic gun barrel.
6. The device for cleaning the condensed ammonium bisulfate in the rotary air preheater as recited in claim 1, wherein: the cleaning medium of the high-pressure water online cleaning component is high-pressure water with the pressure of at least 20 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922176814.1U CN211345388U (en) | 2019-12-08 | 2019-12-08 | Device for cleaning ammonium bisulfate condensed in rotary air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922176814.1U CN211345388U (en) | 2019-12-08 | 2019-12-08 | Device for cleaning ammonium bisulfate condensed in rotary air preheater |
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| CN211345388U true CN211345388U (en) | 2020-08-25 |
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| CN201922176814.1U Active CN211345388U (en) | 2019-12-08 | 2019-12-08 | Device for cleaning ammonium bisulfate condensed in rotary air preheater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555889A (en) * | 2020-12-24 | 2021-03-26 | 重庆大唐国际石柱发电有限责任公司 | Air preheater anti-blocking hot air recirculation system |
| CN112577064A (en) * | 2020-11-11 | 2021-03-30 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure capable of introducing hot air in sections and working method thereof |
| CN113686195A (en) * | 2021-07-07 | 2021-11-23 | 华能伊春热电有限公司 | Clear stifled equipment of sack dust remover unit air preheater intelligent monitoring |
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2019
- 2019-12-08 CN CN201922176814.1U patent/CN211345388U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577064A (en) * | 2020-11-11 | 2021-03-30 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure capable of introducing hot air in sections and working method thereof |
| CN112577064B (en) * | 2020-11-11 | 2023-04-28 | 湖南华电常德发电有限公司 | Air preheater anti-blocking structure with hot air introduced in sections and working method thereof |
| CN112555889A (en) * | 2020-12-24 | 2021-03-26 | 重庆大唐国际石柱发电有限责任公司 | Air preheater anti-blocking hot air recirculation system |
| CN113686195A (en) * | 2021-07-07 | 2021-11-23 | 华能伊春热电有限公司 | Clear stifled equipment of sack dust remover unit air preheater intelligent monitoring |
| CN113686195B (en) * | 2021-07-07 | 2023-10-27 | 华能伊春热电有限公司 | Intelligent monitoring and blocking removing equipment for air pre-heater of bag-type dust collector unit |
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