CN215637291U - Air supply system of boiler - Google Patents
Air supply system of boiler Download PDFInfo
- Publication number
- CN215637291U CN215637291U CN202121072163.2U CN202121072163U CN215637291U CN 215637291 U CN215637291 U CN 215637291U CN 202121072163 U CN202121072163 U CN 202121072163U CN 215637291 U CN215637291 U CN 215637291U
- Authority
- CN
- China
- Prior art keywords
- air
- boiler
- adjusting
- supply system
- taking port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
Abstract
The utility model relates to a boiler air supply system, comprising: the boiler comprises a shell covering the boiler, an air channel positioned between the shell and the outer wall of the boiler and a blower used for conveying air into a hearth of the boiler, wherein a first air taking port is arranged at the upper end of the shell, a second air taking port is arranged at the lower end of the shell, a first adjusting piece used for adjusting the air intake of the first air taking port is arranged at the first air taking port, a second adjusting piece used for adjusting the air intake of the second air taking port is arranged at the second air taking port, the blower is positioned in the air channel, and the air inlet of the blower is arranged close to the second air taking port. The boiler air supply system based on the utility model can effectively improve the temperature of the inlet air, is beneficial to reducing the possibility of low-temperature corrosion of the cold end of the air preheater and reducing the operation rate of the steam air heater, and the heat exchange in the air duct prevents the loss of the dissipated heat of the outer wall of the boiler, improves the utilization rate of the combustion heat of the boiler and effectively improves the boiler efficiency.
Description
Technical Field
The utility model belongs to the technical field of boiler equipment, and particularly relates to a boiler air supply system.
Background
In a thermal power plant, the combustion of fuel in a boiler is not separated from the combustion of the oxidant in air, which is one of the necessary conditions for the fuel to be able to burn, so that a suitable and moderate amount of oxidant contributes to the continuous and stable combustion of the fuel, while the most important oxidant for the combustion of the fuel is the oxygen in air, so that the delivery and demand of air are essential in the combustion of the fuel in the boiler. The conventional air intake system of the boiler is as follows: sufficient air is directly taken from the atmosphere, and is sent to a boiler after the pressure head and the temperature are improved by power equipment such as a blower and heating equipment such as a steam air heater, an air preheater and the like, so as to be combined with fuel for chemical reaction.
Along with the increasing strictness of environmental protection supervision, necessary desulfurization, denitrification and dust removal equipment is added to a plurality of coal-fired boilers, the increase of the equipment in a boiler system inevitably causes the reduction of the temperature of a fume exhaust system under the same working condition, particularly, the possibility of low-temperature corrosion of the cold end of an air preheater is increased under the working condition of winter due to the lower environmental temperature, and under the condition, the possibility of low-temperature corrosion of the air preheater is generally reduced by a method of improving the air supply temperature of the boiler and the comprehensive temperature of the cold end of the air preheater through a steam air heater, on one hand, the steam air heater is generally of a tubular structure, the joint of the pipeline and the end face is cracked to cause leakage due to long-term frequent operation and withdrawal of the air heater, the phenomena of deformation, leakage and the like of the air heater are inevitably caused by the change of thermal stress, or the system is frozen under the working condition in winter due to improper operation, so that the safety of equipment is influenced; on the other hand, the conventional air intake system of the boiler directly takes air from the atmosphere, and under the working condition in winter, because the ambient temperature is too low, the air supply temperature of the boiler is low, the delivery volume of the steam air heater is large, the steam consumption is large, and the energy consumption is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a boiler air supply system, which is used for solving the problem of corrosion of a cold end of an air preheater in the prior art and the problem of equipment safety caused by long-term frequent operation and quit of an air heater.
The specific solution provided by the utility model is as follows:
the utility model provides a boiler air supply system, comprising: the boiler comprises a shell covering the boiler, an air channel positioned between the shell and the outer wall of the boiler and a blower used for conveying air into a hearth of the boiler, wherein a first air taking port is arranged at the upper end of the shell, a second air taking port is arranged at the lower end of the shell, a first adjusting piece used for adjusting the air intake of the first air taking port is arranged at the first air taking port, a second adjusting piece used for adjusting the air intake of the second air taking port is arranged at the second air taking port, the blower is positioned in the air channel, and the air inlet of the blower is close to the second air taking port.
The boiler air supply system is based on the casing outside the boiler, the air channel is arranged between the casing and the outer wall of the boiler, and air entering from the first air intake port enters the boiler furnace through preheating when passing through the air channel, so that the air supply temperature can be effectively improved, the possibility of low-temperature corrosion of the cold end of the air preheater and the operation rate of the steam air heater are reduced, the heat exchange in the air channel prevents the loss of dissipated heat of the outer wall of the boiler, the utilization rate of the combustion heat of the boiler is improved, and the boiler efficiency is effectively improved; the air intake system can switch air sources according to the change of the environmental temperature, and the second adjusting piece can be adjusted to close or reduce the air intake of the second air intake port, the first adjusting piece can be adjusted to open or increase the air intake of the first air intake port under the working condition in winter; in summer, the external environment is higher, the second adjusting piece can be adjusted, the air inlet amount of the second air intake opening is opened or increased, air is directly taken from the external environment, the first adjusting piece is adjusted, and the air inlet amount of the first air intake opening is closed or increased, so that the air volume adjustment of the first air intake opening and the air volume adjustment of the second air intake opening can be carried out according to the temperature of the external environment.
On the basis of the scheme, the utility model can be further improved as follows:
furthermore, the first air intake is arranged on the top wall of the housing, and the second air intake is arranged at the lower end of the side wall of the housing.
Therefore, air enters the air channel from the first air intake port on the top wall of the housing, is subjected to heat exchange with the outer wall of the boiler in the air channel, is increased in temperature, enters from the air inlet of the air blower close to the second air intake port, and is conveyed to the boiler through the air blower.
Further, the first adjusting piece and the second adjusting piece are respectively and independently selected from one of an air volume adjusting baffle door and an adjustable shutter.
The adjustable shutter and the air quantity adjusting baffle door can realize air quantity adjustment, and air quantity requirements of the boiler under various working conditions are met.
Further, the first adjusting piece is an electric air quantity adjusting baffle door, and the second adjusting piece is an electric shutter.
The first air intake is positioned at the top end of the housing (namely above the boiler), the temperature is higher generally, the requirement on the material is high, the mechanical strength of the electric air volume adjusting baffle door is high, the safety is high, and the first air intake can be used as an air volume adjusting device.
The air preheater is used for heating air conveyed by the air feeder, an air outlet of the air feeder is communicated with a cold end of the air preheater, and a hot end of the air preheater is communicated with an air inlet of a boiler hearth.
Therefore, air flowing through the air channel enters the air feeder after being preheated, is conveyed to the cold end of the air preheater through the air feeder, and then enters the boiler furnace after being heated by smoke flowing out of the boiler flue.
Drawings
Fig. 1 is a schematic structural view of a boiler air supply system of the present invention.
In fig. 1, the components represented by the respective reference numerals are as follows:
1. a housing; 11. a first air intake; 12. a second air intake;
2. a blower;
3. an air duct;
4. a first adjustment member;
5. a second adjustment member;
6. an air preheater;
7. a boiler;
8. a flue.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
The utility model is described below with reference to a specific embodiment in conjunction with fig. 1.
As shown in fig. 1, the air supply system for a boiler according to the present invention includes: the boiler comprises a shell 1 covering the boiler, an air channel 3 located between the shell 1 and the outer wall of the boiler and a blower 2 used for conveying air into a hearth of the boiler, wherein a first air taking port 11 is arranged at the upper end of the shell 1, a second air taking port 12 is arranged at the lower end of the shell 1, the first air taking port is provided with a first adjusting piece 4 used for adjusting the air intake of the first air taking port, the second air taking port is provided with a second adjusting piece 5 used for adjusting the air intake of the second air taking port, the blower 2 is located in the air channel 3, and the air inlet of the blower 2 is close to the second air taking port. Based on the boiler air supply system, the air channel 3 is arranged between the housing 1 and the outer wall of the boiler, when air entering from the first air intake passes through the air channel (arrows represent the flowing direction of the air entering the boiler hearth from the first air intake and the second air intake), the air enters the boiler 7 hearth through preheating, so that the temperature of the air entering can be effectively increased, the possibility of low-temperature corrosion of the cold end of the air preheater is reduced, the operation rate of the steam air heater is reduced, the loss of the heat dissipated from the outer wall of the boiler is prevented by heat exchange in the air channel, the utilization rate of the combustion heat of the boiler is increased, and the boiler efficiency is effectively increased; the air intake system can switch air sources according to the change of the environmental temperature, and the second adjusting piece can be adjusted to close or reduce the air intake of the second air intake port, the first adjusting piece can be adjusted to open or increase the air intake of the first air intake port under the working condition in winter; in summer, the external environment is higher, the second adjusting piece can be adjusted, the air inlet amount of the second air intake opening is opened or increased, air is directly taken from the external environment, the first adjusting piece is adjusted, and the air inlet amount of the first air intake opening is closed or increased, so that the air volume adjustment of the first air intake opening and the air volume adjustment of the second air intake opening can be carried out according to the temperature of the external environment.
Based on the boiler air supply system of the embodiment of the utility model, the first air intake 11 is arranged on the top wall of the housing 1, and the second air intake 12 is arranged at the lower end of the side wall of the housing 1. Air enters the air channel from the first air intake port on the top wall of the housing 1, is subjected to heat exchange with the outer wall of the boiler in the air channel, is heated, enters the air channel from the air inlet of the air feeder 2 close to the second air intake port, and is conveyed to the boiler through the air feeder.
According to the air supply system of the boiler, the first adjusting piece 4 and the second adjusting piece 5 are respectively and independently selected from one of an air volume adjusting baffle door and an adjustable shutter. The adjustable shutter and the air quantity adjusting baffle door can realize air quantity adjustment, and air quantity requirements of the boiler under various working conditions are met.
Based on the boiler air supply system of the embodiment of the utility model, the first adjusting piece 4 is an electric air quantity adjusting baffle door, and the second adjusting piece 5 is an electric shutter. The first air intake is positioned at the top end of the housing (namely above the boiler), the temperature is higher generally, the requirement on the material is high, the mechanical strength of the electric air volume adjusting baffle door is high, the safety is high, and the first air intake can be used as an air volume adjusting device.
The boiler air supply system based on the embodiment of the utility model further comprises an air preheater 6 for heating air conveyed by the air feeder, the air outlet of the air feeder 2 is communicated with the cold end of the air preheater 6, and the hot end of the air preheater 6 is communicated with the air inlet of the boiler hearth. The air flowing through the air duct 3 enters the air feeder 2 after being preheated, is conveyed to the cold end of the air preheater 6 through the air feeder 2, and then enters the hearth of the boiler 7 after being heated by the smoke flowing out of the flue 8.
Although embodiments of the present invention have been described in detail above, those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A boiler air supply system, comprising: the boiler comprises a shell (1) covering the boiler, an air duct (3) arranged between the shell (1) and the outer wall of the boiler and a blower (2) used for conveying air into a boiler furnace, wherein a first air taking opening (11) is formed in the upper end of the shell (1), a second air taking opening (12) is formed in the lower end of the shell (1), a first adjusting piece (4) used for adjusting the air intake of the first air taking opening is arranged at the first air taking opening, a second adjusting piece (5) used for adjusting the air intake of the second air taking opening is arranged at the second air taking opening, the blower (2) is located in the air duct (3), and the air inlet of the blower (2) is close to the second air taking opening.
2. The boiler air supply system according to claim 1, wherein the first air intake (11) is provided in a top wall of the casing (1), and the second air intake (12) is provided in a lower end of a side wall of the casing (1).
3. The boiler air supply system according to claim 1, wherein the first adjusting member (4) and the second adjusting member (5) are respectively and independently selected from one of an air volume adjusting damper door and an adjustable louver.
4. A boiler air supply system according to claim 3, characterized in that the first adjusting member (4) is an electric air volume adjusting damper door and the second adjusting member (5) is an electric shutter.
5. The boiler air supply system according to any one of claims 1-4, further comprising an air preheater (6) for heating air supplied by the air supply blower, wherein the air outlet of the air supply blower (2) is communicated with the cold end of the air preheater (6), and the hot end of the air preheater (6) is communicated with the air inlet of the boiler furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121072163.2U CN215637291U (en) | 2021-05-19 | 2021-05-19 | Air supply system of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121072163.2U CN215637291U (en) | 2021-05-19 | 2021-05-19 | Air supply system of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215637291U true CN215637291U (en) | 2022-01-25 |
Family
ID=79938574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121072163.2U Active CN215637291U (en) | 2021-05-19 | 2021-05-19 | Air supply system of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215637291U (en) |
-
2021
- 2021-05-19 CN CN202121072163.2U patent/CN215637291U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104832930A (en) | Slag cooling device applicable to dry slag discharge machines and application thereof | |
| CN109028035A (en) | A kind of gasification of biomass-combustion side coupling coal-burning boiler | |
| CN215637291U (en) | Air supply system of boiler | |
| CN111118245B (en) | High-temperature preheating system and method for hot blast stove | |
| CN201053764Y (en) | Highly efficient energy-saving heat-conductive oil stove | |
| CN209445339U (en) | A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler | |
| CN208735652U (en) | The eliminating white smoke system that a kind of heat exchanger and air preheater combine | |
| CN207786296U (en) | Denitration in Boiler system | |
| CN214370115U (en) | Waste heat cascade utilization system for coal-fired flue gas | |
| CN111895442A (en) | Flue gas treatment system of power plant | |
| CN201110555Y (en) | Low heat consuming electric desulfurizing device | |
| CN203880710U (en) | Preheating type combustor for industrial kilns and furnaces | |
| CN201429336Y (en) | Heat Recovery System for Waste Heat Boiler in Glass Production Line with Combustion Air Heating Section | |
| CN214581032U (en) | Stable furnace pressure regenerative combustion system | |
| CN214038367U (en) | Power plant's boiler flue gas waste heat utilization system | |
| CN210951374U (en) | Device for increasing primary air temperature | |
| CN204534546U (en) | Biomass boiler environmental protection and energy saving control system | |
| CN113623680A (en) | Biomass fuel preheating evaporation dryer and method | |
| CN208794393U (en) | A kind of gasification of biomass-combustion side coupling coal-burning boiler | |
| CN207797100U (en) | Flue gas denitrification system | |
| CN208475347U (en) | Low nitrogen high efficient heat exchanging system | |
| CN207046878U (en) | Hot-blast stove fume comprehensive utilization device in a kind of aluminium polychloride production | |
| CN217356938U (en) | Smoke discharging temperature adjusting device of boiler flue gas cooler | |
| CN219194888U (en) | High-efficiency biomass gasification furnace | |
| CN111207600A (en) | Method for utilizing waste heat of flue gas in glass kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |