CN215765198U - Boiler fan pipeline for improving inlet air temperature - Google Patents
Boiler fan pipeline for improving inlet air temperature Download PDFInfo
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- CN215765198U CN215765198U CN202121958563.3U CN202121958563U CN215765198U CN 215765198 U CN215765198 U CN 215765198U CN 202121958563 U CN202121958563 U CN 202121958563U CN 215765198 U CN215765198 U CN 215765198U
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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 embodiment of the application discloses promote boiler fan pipeline of entry wind-warm syndrome for reduce the corrosion condition that air heater's wall temperature is in to be less than acid dew point temperature, improve boiler unit security. The embodiment of the application comprises the following steps: the air conditioner comprises a primary fan, a first air heater, an air preheater, a first electric three-way baffle, a first indoor inlet air box and a first outdoor inlet air box; the first indoor inlet air box and the first outdoor inlet air box are respectively connected with a first electric three-way baffle, the first indoor inlet air box is used for sucking air in the boiler room, the first outdoor inlet air box is used for sucking air outside the boiler room, and the first electric three-way baffle is used for switching air sources; the first electric three-way baffle is connected with a primary air fan, and the primary air fan is used for sucking gas; the primary air fan is connected with a first air heater, and the first air heater is used for heating air sucked by the primary air fan; the first air heater is connected with the air preheater, and the air preheater is used for heating the air.
Description
Technical Field
The embodiment of the application relates to the technical field of boilers, in particular to a boiler fan pipeline for improving inlet air temperature.
Background
Electric power is an important living resource indispensable to human life, and the current power generation modes are various, but the most important power generation mode is thermal power generation.
Thermal power generation is a thermal power plant that uses fuel and air to burn and converts energy stored in coal into electrical energy. Most of sulfur in fuel is converted into sulfur dioxide and sulfur trioxide in the combustion process of a boiler in a thermal power plant, and the sulfur trioxide reacts with water vapor in flue gas to form a layer of sulfuric acid film on the surface of heat exchange elements such as an air preheater, so that carbon steel heat exchange elements are corroded. The highest temperature of a layer of continuous sulfuric acid film formed on the surface of the heat exchange element is called as the acid dew point of the flue gas, when the wall temperature of the heat exchange element is lower than the acid dew point temperature, sulfuric acid steam can be condensed on the wall surface to corrode the heat exchange element, fly ash is continuously bonded, a channel is blocked, the heat exchange efficiency of the heat exchange element is reduced, the service life of the heat exchange element is prolonged, and therefore the safe and economic operation of the air preheater is influenced. To effectively control and slow the corrosion of heat exchange elements such as air preheaters, it is necessary to avoid long term operation of the air preheater below the acid dew point temperature.
At present, inlet air boxes of primary and secondary fans of a boiler are generally arranged at a position 8 meters away from a boiler room, and inlet air comes from outdoor atmosphere. The air temperature of the fan entering the northern severe cold area in winter is low, so that the air temperature entering the air preheater is low, the condition that the wall temperature of the air preheater is lower than the acid dew point temperature is easy to occur, the air preheater is damaged and shut down, and the safety of a boiler unit is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the application provides a boiler fan pipeline of promotion entry wind-warm syndrome, its characterized in that includes:
the air conditioner comprises a primary fan, a first air heater, an air preheater, a first electric three-way baffle, a first indoor inlet air box and a first outdoor inlet air box;
the first indoor inlet air box and the first outdoor inlet air box are respectively connected with the first electric three-way baffle, the first indoor inlet air box is used for sucking air in a boiler room, the first outdoor inlet air box is used for sucking air outside the boiler room, and the first electric three-way baffle is used for switching air sources;
the first electric three-way baffle is connected with the primary air fan, and the primary air fan is used for sucking air;
the primary air fan is connected with the first air heater, and the first air heater is used for heating the gas sucked by the primary air fan;
the first air heater is connected with the air preheater, and the air preheater is used for heating air.
Optionally, still include first air filter and second air filter, first air filter set up in on the first indoor import bellows, the second air filter set up in on the first outdoor import bellows, first air filter with the second air filter is arranged in the foreign matter among the filtered air.
Optionally, still include first muffler, first muffler sets up in connecting first electronic three baffle with the boiler pipeline of primary air fan is gone up, first muffler is used for making an uproar to fall the boiler pipeline.
Optionally, the air preheater is a rotary air preheater, and the rotary air preheater is used for circularly preheating air.
Optionally, the first indoor inlet air box is an indoor top inlet air box, and the indoor top inlet air box is used for extracting hot air from the top in the boiler room.
Optionally, the system further comprises a temperature sensor, wherein the temperature sensor is used for monitoring the temperature of the boiler fan pipeline.
Optionally, the air conditioner further comprises a secondary air fan, a second air heater, a second electric three-way baffle, a second indoor inlet air box and a second outdoor inlet air box;
the second indoor inlet air box and the second outdoor inlet air box are respectively connected with the second electric three-way baffle, the second indoor inlet air box is used for sucking air in the boiler room, the second outdoor inlet air box is used for sucking air outside the boiler room, and the second electric three-way baffle is used for switching air sources;
the second electric three-way baffle is connected with the secondary air fan, and the secondary air fan is used for sucking air;
the secondary air fan is connected with the second air heater, and the second air heater is used for heating air sucked by the secondary air fan;
the second air heater is connected with the air preheater, and the air preheater is used for heating air.
Optionally, still include third air filter and fourth air filter, the third air filter set up in on the second indoor import bellows, the fourth air filter set up in on the second outdoor import bellows, the third air filter with the fourth air filter is arranged in the foreign matter among the filtered air.
Optionally, the second silencer is arranged on a boiler pipeline connecting the second electric three-way baffle and the secondary air fan, and is used for reducing noise of the boiler pipeline.
Optionally, the second indoor inlet air box is an indoor top inlet air box, and the indoor top inlet air box is used for extracting hot air from the top in the boiler room.
According to the technical scheme, the embodiment of the application has the following advantages:
the first indoor inlet air box and the first outdoor inlet air box are respectively connected with the first electric three-way baffle, so that the first electric three-way baffle can freely adjust the inlet air box according to actual conditions. When being in winter, or when outdoor temperature is lower, first electronic tee bend baffle can select first indoor import bellows as the air inlet of taking out for the air in the boiler room passes through the primary air fan, reachs first air heater, and after the air was preheated to the air heater, it heats in letting in the air heater. Compared with outdoor air, because the air temperature in the boiler room is higher than the outdoor air temperature, the air temperature of the primary air fan is higher than the outdoor air, the air temperature of the primary air fan is increased, the wall temperature of the primary air heater is lower than the acid dew point temperature, the air preheater is prevented from being damaged and stopped, and the safety of a boiler unit is improved.
Drawings
FIG. 1 is a schematic structural view of one embodiment of a conventional boiler fan circuit provided herein;
FIG. 2 is a schematic structural diagram of an embodiment of a boiler fan pipeline for raising inlet air temperature provided in the present application.
Detailed Description
Referring to fig. 1, in a conventional boiler fan pipeline, inlet windboxes of a primary fan 1 and an overfire fan 10 of a boiler are generally arranged at 8 meters in a boiler room, inlet air of the inlet windboxes is totally from outdoor atmosphere, outdoor air is respectively transmitted to a first silencer 9 and a second silencer 17 through a second filter screen 8 and a fourth filter screen 16, then is subjected to heating treatment by the primary fan 1 and the overfire fan 10 to obtain a first air heater 2 and a second air heater 11, and finally is input into an air preheater 3 for heating. The air temperature of the fan entering the northern severe cold area in winter is low, so that the air temperature entering the air preheater is low, the condition that the wall temperature of the air preheater is lower than the acid dew point temperature is easy to occur, the air preheater is damaged and shut down, and the safety of a boiler unit is reduced.
In order to solve the technical problem, the embodiment of the application discloses a boiler fan pipeline for increasing inlet air temperature, which is used for reducing the corrosion condition that the wall temperature of an air preheater is lower than the acid dew point temperature, and improving the safety of a boiler unit.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit specific mounting orientations of the respective members or components.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 2, fig. 2 is a schematic diagram of a boiler fan pipeline for increasing inlet air temperature according to the present application, which includes:
the air conditioner comprises a primary fan 1, a first air heater 2, an air preheater 3, a first electric three-way baffle 4, a first indoor inlet air box 5 and a first outdoor inlet air box 6;
the first indoor inlet air box 5 and the first outdoor inlet air box 6 are respectively connected with the first electric three-way baffle 4, the first indoor inlet air box 5 is used for sucking air in a boiler room, the first outdoor inlet air box 6 is used for sucking air outside the boiler room, and the first electric three-way baffle 4 is used for switching air sources;
the first electric three-way baffle 4 is connected with the primary air fan 1, and the primary air fan 1 is used for sucking air;
the primary air fan 1 is connected with the first air heater 2, and the first air heater 2 is used for heating the gas sucked by the primary air fan 1;
the first air heater 2 is connected with the air preheater 3, and the air preheater 3 is used for heating air.
The first indoor inlet bellows 5 and the first outdoor inlet bellows 6 are respectively connected with the first electric three-way baffle 4, so that the first electric three-way baffle 4 can freely adjust the inlet bellows according to actual conditions. When being in winter, or when outdoor temperature is lower, first electronic tee bend baffle 4 can select first indoor import bellows 5 as the air inlet of drawing out for the air in the boiler room passes through primary air fan 1, reachs first fan heater 2, and after the fan heater preheats the air, lets in and heats in the air heater 3. Compare with outdoor air, because the air temperature in the boiler room is higher than outdoor air temperature for the air temperature that gets into primary air fan 1 is higher than outdoor air, and then leads to the air temperature who gets into air heater 3 to improve, makes the condition that air heater 3's wall temperature is in to be less than acid dew point temperature more difficult to take place, reduces the condition that air heater 3 damaged the shut down, increases boiler unit security.
Traditional boiler fan pipeline only uses outdoor air, and the boiler fan pipeline of this application embodiment can freely switch over indoor and outdoor air according to actual conditions, has strengthened the practicality.
Taking 30% of boiler load in winter as an example, the air temperature distribution of each part is as follows:
optionally, still include first air filter 7 and second air filter 8, first air filter 7 set up in on the first indoor import bellows 5, second air filter 8 set up in on the first outdoor import bellows 6, first air filter with second air filter 8 is arranged in the foreign matter in the filtered air.
The effect of filter screen is to separate foreign matters such as granule in the air, dust, places granule and dust and gets into the fan in, blocks up the fan, has increased the life of fan.
Optionally, the boiler further comprises a first silencer 9, the first silencer 9 is arranged on a boiler pipeline connecting the first electric three-way baffle 4 and the primary air fan 1, and the first silencer 9 is used for reducing noise of the boiler pipeline.
The muffler is used for making an uproar falls to the boiler pipeline, for the workman of boiler plant work and the resident around the boiler plant provides the noise reduction effect, reduces the noise pollution of boiler pipeline.
Optionally, the air preheater 3 is a rotary air preheater 3, and the rotary air preheater 3 is used for circularly preheating air.
Optionally, the first indoor inlet air box 5 is an indoor top inlet air box, and the indoor top inlet air box is used for extracting hot air from the top in the boiler room.
The indoor top inlet air box is used for extracting the hot air at the top layer in the boiler room, because the boiler room of a thermal power plant is usually closed in a close-fitting manner, heating facilities and operation equipment are arranged in the boiler room, the indoor bottom heat is sufficient in winter, the temperature of the air gathered at the top of the boiler room is relatively high and can reach 15-20 ℃, after the inlet air of a primary air fan 1 of the boiler is changed into the indoor top inlet air box, the cold end comprehensive temperature of an air preheater can be increased by 15-25 ℃, cold end low-temperature corrosion caused by the fact that the air temperature of an air preheater 3 is lower than the acid dew point temperature can be effectively avoided, the service life of the equipment is prolonged, and the operation reliability of a unit is improved. And secondly, the steam consumption of the first air heater 2 can be reduced, and the unit efficiency is improved.
Optionally, the system further comprises a temperature sensor, wherein the temperature sensor is used for monitoring the temperature of the boiler fan pipeline.
Optionally, the system further comprises an overfire air blower 10, a second air heater 11, a second electric three-way baffle 12, a second indoor inlet air box 13 and a second outdoor inlet air box 14;
the second indoor inlet air box 13 and the second outdoor inlet air box 14 are respectively connected with the second electric three-way baffle 12, the second indoor inlet air box 13 is used for sucking air in a boiler room, the second outdoor inlet air box 14 is used for sucking air outside the boiler room, and the second electric three-way baffle 12 is used for switching air sources;
the second electric three-way baffle 12 is connected with the secondary air fan 10, and the secondary air fan 10 is used for sucking air;
the secondary air fan 10 is connected with the second air heater 11, and the second air heater 11 is used for heating the air sucked by the secondary air fan 10;
the second air heater 11 is connected to the air preheater 3, and the air preheater 3 is used for heating air.
Optionally, still include third air filter 15 and fourth air filter 16, third air filter 15 set up in on the second indoor import bellows 13, fourth air filter 16 set up in on the second outdoor import bellows 14, third air filter 15 with fourth air filter 16 is arranged in the foreign matter in the filtered air.
Optionally, the system further comprises a second silencer 17, the second silencer 17 is arranged on a boiler pipeline connecting the second electric three-way baffle 12 and the secondary air fan 10, and the second silencer 17 is used for reducing noise of the boiler pipeline.
Optionally, the second indoor inlet air box 13 is an indoor top inlet air box, and the indoor top inlet air box is used for extracting hot air from the top in the boiler room.
The first indoor inlet bellows 5 and the first outdoor inlet bellows 6 are respectively connected with the first electric three-way baffle 4, so that the first electric three-way baffle 4 can freely adjust the inlet bellows according to actual conditions. When being in winter, or when outdoor temperature is lower, first electronic tee bend baffle 4 can select first indoor import bellows 5 as the air inlet of drawing out for the air in the boiler room passes through primary air fan 1, reachs first fan heater 2, and after the fan heater preheats the air, lets in and heats in the air heater 3. Compare with outdoor air, because the air temperature in the boiler room is higher than outdoor air temperature for the air temperature that gets into primary air fan 1 is higher than outdoor air, and then leads to the air temperature who gets into air heater 3 to improve, makes the condition that air heater 3's wall temperature is in to be less than acid dew point temperature more difficult to take place, reduces the condition that air heater 3 damaged the shut down, increases boiler unit security.
And secondly, an overfire air blower 10, a second air heater 11, a second electric three-way baffle 12, a second indoor inlet air box 13 and a second outdoor inlet air box 14 are added, so that the air input is increased, and the functions of the boiler unit are increased.
Claims (10)
1. A boiler fan pipeline for increasing inlet air temperature is characterized by comprising:
the air conditioner comprises a primary fan, a first air heater, an air preheater, a first electric three-way baffle, a first indoor inlet air box and a first outdoor inlet air box;
the first indoor inlet air box and the first outdoor inlet air box are respectively connected with the first electric three-way baffle, the first indoor inlet air box is used for sucking air in a boiler room, the first outdoor inlet air box is used for sucking air outside the boiler room, and the first electric three-way baffle is used for switching air sources;
the first electric three-way baffle is connected with the primary air fan, and the primary air fan is used for sucking air;
the primary air fan is connected with the first air heater, and the first air heater is used for heating the gas sucked by the primary air fan;
the first air heater is connected with the air preheater, and the air preheater is used for heating air.
2. The boiler fan pipeline of claim 1, further comprising a first air screen and a second air screen, the first air screen disposed on the first indoor inlet bellows, the second air screen disposed on the first outdoor inlet bellows, the first air screen and the second air screen for filtering foreign matter in the air.
3. The boiler fan pipeline of claim 1, further comprising a first silencer, the first silencer being disposed on the boiler pipeline connecting the first electric three-way baffle and the primary fan, the first silencer being configured to reduce noise of the boiler pipeline.
4. The boiler fan duct of claim 1, wherein the air preheater is a rotary air preheater for circulating preheated air.
5. The boiler fan duct of claim 1, wherein the first indoor inlet windbox is an indoor top inlet windbox for extracting top hot air from the inside of the boiler room.
6. The boiler fan duct of claim 1, further comprising a temperature sensor for monitoring a temperature of the boiler fan duct.
7. The boiler fan pipeline of any of claims 1 to 6, further comprising an overfire air fan, a second air heater, a second electrically powered three-way damper, a second indoor inlet windbox, and a second outdoor inlet windbox;
the second indoor inlet air box and the second outdoor inlet air box are respectively connected with the second electric three-way baffle, the second indoor inlet air box is used for sucking air in the boiler room, the second outdoor inlet air box is used for sucking air outside the boiler room, and the second electric three-way baffle is used for switching air sources;
the second electric three-way baffle is connected with the secondary air fan, and the secondary air fan is used for sucking air;
the secondary air fan is connected with the second air heater, and the second air heater is used for heating air sucked by the secondary air fan;
the second air heater is connected with the air preheater, and the air preheater is used for heating air.
8. The boiler fan pipeline of claim 7, further comprising a third air screen and a fourth air screen, the third air screen disposed on the second indoor inlet bellows, the fourth air screen disposed on the second outdoor inlet bellows, the third air screen and the fourth air screen for filtering foreign matter in the air.
9. The boiler fan pipeline of claim 7, further comprising a second silencer, the second silencer being disposed on the boiler pipeline connecting the second electric three-way baffle and the overfire air fan, the second silencer being configured to reduce noise of the boiler pipeline.
10. The boiler fan duct of claim 7, wherein the second indoor inlet windbox is an indoor top inlet windbox for extracting top hot air from the inside of the boiler room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121958563.3U CN215765198U (en) | 2021-08-19 | 2021-08-19 | Boiler fan pipeline for improving inlet air temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121958563.3U CN215765198U (en) | 2021-08-19 | 2021-08-19 | Boiler fan pipeline for improving inlet air temperature |
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| Publication Number | Publication Date |
|---|---|
| CN215765198U true CN215765198U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121958563.3U Active CN215765198U (en) | 2021-08-19 | 2021-08-19 | Boiler fan pipeline for improving inlet air temperature |
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| CN (1) | CN215765198U (en) |
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2021
- 2021-08-19 CN CN202121958563.3U patent/CN215765198U/en active Active
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