CN217816692U - Boiler preheating system - Google Patents
Boiler preheating system Download PDFInfo
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- CN217816692U CN217816692U CN202220306608.7U CN202220306608U CN217816692U CN 217816692 U CN217816692 U CN 217816692U CN 202220306608 U CN202220306608 U CN 202220306608U CN 217816692 U CN217816692 U CN 217816692U
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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
Abstract
The application discloses boiler preheating system can heat the boiler through the hot-air on air cooling island to can reduce the energy consumption of stove, improve the economic nature of stove heating process. The boiler preheating system in this application includes: the system comprises an air cooling island, a hot air pipeline, a fan, an air outlet pipeline, a boiler to be preheated and a first boiler; the steam turbine generator unit of the first boiler is connected with the air cooling island, and the air cooling island is used for cooling the dead steam of the steam turbine generator unit of the first boiler so as to generate hot air and discharge the hot air from an air outlet of the air cooling island; the air inlet of the hot air pipeline is positioned above the air outlet of the air cooling island and is used for receiving and conducting hot air exhausted from the air outlet of the air cooling island; one end of the fan is connected with the hot air pipeline, and the other end of the fan is connected with the boiler to be preheated through the air outlet pipeline so as to guide hot air in the hot air pipeline to blow into the boiler to be preheated.
Description
Technical Field
The application relates to the technical field of boiler equipment in power plants, in particular to a boiler preheating system.
Background
The boiler is one of the main production equipment of the thermal power plant, and the main function of the boiler is to convert the chemical energy of the fuel into heat energy and heat the feed water by the heat energy to ensure that the feed water has qualified steam with certain quantity and quality.
In the prior art, the boiler needs to be preheated by external fuel in the starting process of the boiler, so that new fuel fed into the boiler is quickly ignited, and the fuel can be continuously combusted.
However, the external fuel has a high cost for preheating the boiler, thereby affecting the economy of the boiler preheating process.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present application provides a boiler preheating system capable of heating a boiler by hot air of an air cooling island, thereby improving the economy of a furnace heating process, and the following example is specifically referred to.
The application provides a boiler preheating system, includes: the system comprises an air cooling island, a hot air pipeline, a fan, an air outlet pipeline, a boiler to be preheated and a first boiler;
the steam turbine generator unit of the first boiler is connected with the air cooling island, and the air cooling island is used for cooling the dead steam of the steam turbine generator unit of the first boiler so as to generate hot air and discharge the hot air from an air outlet of the air cooling island;
the air inlet of the hot air pipeline is positioned above the air outlet of the air cooling island and is used for receiving and conducting hot air discharged from the air outlet of the air cooling island;
one end of the fan is connected with the hot air pipeline, and the other end of the fan is connected with the boiler to be preheated through the air outlet pipeline so as to guide hot air in the hot air pipeline to blow into the boiler to be preheated.
Optionally, the boiler preheating system further comprises an air inlet pipe;
one end of the air inlet pipeline is connected with the outside, and the other end of the air inlet pipeline is connected with the fan and used for connecting an air inlet of the fan with the outside.
Optionally, the hot air duct and the air inlet duct are respectively provided with a first baffle plate, and the first baffle plates are used for respectively controlling the communication or the disconnection of the air inlet of the fan with the outside of the hot air duct and the outside of the air inlet duct.
Optionally, the number of the fans is matched with that of the fans, one end of each fan is connected with a hot air pipeline, and the other end of each fan is connected with the boiler to be preheated, so that hot air in the hot air pipelines is guided to blow into the boiler to be preheated.
Optionally, a second baffle is arranged in the air outlet pipeline, and the second baffle is used for controlling the communication or disconnection isolation state between the air outlet of the fan and the boiler to be preheated.
Optionally, the axis direction of the air inlet of the hot air duct is perpendicular to the ground.
Optionally, an air inlet of the hot air pipeline is provided with a collector, and the collector is used for enabling hot air on the air cooling island to uniformly enter the hot air pipeline.
Optionally, a joint of the air outlet pipeline and the boiler to be preheated is located at the bottom of the boiler to be preheated, and an axis of an air outlet of the joint of the air outlet pipeline and the boiler to be preheated is perpendicular to an axis of the boiler to be preheated.
Optionally, the axes corresponding to the fan, the air inlet duct and the air outlet duct are located on the same straight line.
Optionally, the fan is an axial fan.
According to the technical scheme, the method has the following advantages:
the air cooling island is used for cooling the exhaust steam of the steam turbine generator unit of the first boiler so as to generate hot air and discharge the hot air from an air outlet of the air cooling island; the air inlet of the hot air pipeline is positioned above the air outlet of the air cooling island and used for collecting hot air exhausted from the air outlet of the air cooling island, one end of the fan is connected with the hot air pipeline, the other end of the fan is connected with the boiler to be preheated through the air outlet pipeline, so that the hot air in the hot air pipeline is guided to blow into the boiler to be preheated, the boiler to be preheated is heated by utilizing the hot air exhausted from the air cooling island, the energy consumption of the heating furnace can be reduced, and the economy of the heating furnace process is improved.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a boiler preheating system in the present application.
Detailed Description
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 in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.
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 the case may be.
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 application provides a boiler preheating system can heat the boiler through the hot-air on air cooling island to reduce the energy consumption of stove, improve the economic nature of stove process.
Referring to fig. 1, a boiler preheating system of the present application includes: the system comprises an air cooling island 1, a hot air pipeline 2, a fan 3, an air outlet pipeline 4, a boiler to be preheated 5 and a first boiler 6;
the steam turbine generator unit of the first boiler 6 is connected with the air cooling island 1, and the air cooling island 1 is used for cooling the steam exhaust of the steam turbine generator unit of the first boiler 6 so as to generate hot air and discharge the hot air from the air outlet of the air cooling island 1;
the air inlet of the hot air pipeline 2 is positioned above the air outlet of the air cooling island 1 and is used for receiving and conducting hot air discharged from the air outlet of the air cooling island 1;
and one end of the fan 3 is connected with the hot air pipeline 2, and the other end of the fan is connected with the boiler to be preheated 5 through the air outlet pipeline 4 so as to guide hot air in the hot air pipeline 2 to blow into the boiler to be preheated 5.
It should be particularly noted that the type of the boiler 5 to be preheated may be a circulating fluidized bed boiler or a common pulverized coal boiler, wherein the specific parts of the circulating fluidized bed boiler heated by hot air are a circulating material part and a hearth in the boiler, and the corresponding type of the fan may be a primary fan, and the primary fan blows hot air to preheat the circulating material; the specific part of the pulverized coal boiler heated by hot air is the space environment in the boiler, the corresponding fan type can be a secondary fan, and hot air is blown by the secondary fan to be guided into the pulverized coal boiler to preheat the boiler.
The blower 3 is mainly used for pressurizing air to a certain value, blowing hot air into a hearth of the boiler 5 to be preheated, and taking oxygen in the air as combustion-supporting gas, and it can be understood that the boiler 5 to be preheated is generally provided with other blowers for supporting combustion or fluidizing bed materials and adjusting a combustion center.
It should be noted that the air cooling island 1 is another name of an air cooling device, and is used for cooling high-temperature steam generated by a boiler and other devices by using air as a coolant, the air cooling island 1 is a cooling device for cooling exhaust steam generated in the power generation process of a turbo generator unit of the first boiler 6, so as to generate hot air for heating the boiler 5 to be preheated, and it can be understood that the air cooling island 1 is used for cooling the exhaust steam generated by the turbo generator unit of the first boiler 6 to recover the working medium of the turbo generator unit.
The air inlet of hot-blast main 2 is located the air outlet top in air cooling island 1, an air outlet exhaust hot-air for collecting air cooling island 1, 3 one end of fan is connected with hot-blast main 2, the other end is connected with treating preheating boiler 5 through air-out pipeline 4, in order to guide the hot-air in the hot-blast main 2 to blow to treating preheating boiler 5 in, utilize the hot-air of air cooling island 1 exhaust to treat preheating boiler 5 and heat, can reduce the energy consumption of warming-up furnace, thereby improve the economic nature of warming-up furnace process, furthermore, retrieve the heat of air in the direct air cooling, can reduce the extravagant saving of energy, the utilization ratio of the energy is improved and this treat that preheating boiler 5 heating process compares in the local high temperature condition that probably produces in the heating of external fuel has higher security.
Optionally, the boiler preheating system further comprises an air inlet duct 7; one end of the air inlet pipeline 7 is connected with the outside, and the other end of the air inlet pipeline is connected with the fan 3 and used for connecting an air inlet of the fan 3 with the outside. This inlet duct 7 can understand another branch that the inlet of fan 3 mouthful department is connected, and is similar with hot-blast main 2's effect, is used for normally docking the air outlet of fan 3 with the external world for when weather temperature is hotter or does not need the hot-blast air in the hot-blast main 2 temporarily to this treat preheating boiler 5 and heat, can utilize external normal atmospheric temperature air to provide the air gas circuit for the inlet of fan 3.
Optionally, the hot air duct 2 and the air inlet duct 7 are respectively provided with a first baffle 8, and the first baffle 8 is used for respectively controlling the communication or the disconnection isolation state between the air inlet of the fan 3 and the outside of the hot air duct 2 and the outside of the air inlet duct 7. It can be understood that the first baffle 8 is arranged in the hot air duct 2 and the air inlet duct 7, the first baffle 8 can be an electric baffle and is connected with an electric switch, so that the opening and closing state of the first baffle 8 is controlled by the electric switch, and the conduction or the blocking of the hot air duct 2 and the air inlet duct 7 are controlled respectively.
Optionally, the fan 3 includes a plurality of, and the quantity of hot-blast main 2 matches with the quantity of fan 3, and any fan 3 one end is connected with hot-blast main 2, and the other end is connected with the boiler 5 of waiting to preheat to the hot-blast air in the guide hot-blast main 2 blows to waiting to preheat in the boiler 5. It can be understood that the increase of the number of the fans 3 and the hot air pipes 2 can be understood as increasing the cross-sectional area of the air path for absorbing the hot air in the air cooling island 1, so that the velocity of the hot air introduced into the boiler 5 to be preheated in the same time can be increased, and the heating process of the hot air on the boiler 5 to be preheated can be accelerated.
Wherein, the quantity of air-out pipeline 4 can match with the quantity of fan 3, also can be one, treat that air-out pipeline 4 that preheating boiler 5 connects can also be for many, many air-out pipelines 4 are connected with fan 3 one-to-one respectively, thereby can understand the leading-in gas circuit sectional area increase of treating the hot-air in preheating boiler 5, thereby can be so that treat the speed increase of leading-in hot-air in preheating boiler 5 in the same time, thereby accelerate the heating process that preheating boiler 5 was treated to hot-air.
Optionally, a second baffle 9 is disposed in the air outlet duct 4, and the second baffle 9 is used to control a communication or a turn-off isolation state between the air outlet of the fan 3 and the boiler 5 to be preheated. When the temperature of the boiler 5 to be preheated is high in normal operation, the second baffle 9 can control the fan 3 to be conducted or blocked with the gas path of the boiler 5 to be preheated, so as to separate the preheating process of the boiler 5 to be preheated from the normal heating process of the boiler 5 to be preheated, it can be understood that the second baffle 9 can be an electric baffle, the working process of the electric baffle is similar to that of the first baffle 7, and details are not repeated here.
Alternatively, the axis direction of the air inlet of the hot air duct 2 is perpendicular to the ground. Because the hot air discharged from the air outlet of the air cooling island 1 has high temperature, the air is heated to expand in volume, the air density is small, and the weight is light, the moving direction of the hot air is generally vertical to the ground, the position of the hot air pipeline 2 is generally above the air cooling island 1, and the axial direction of the air inlet of the hot air pipeline 2 is vertical to the ground, so that more hot air can enter the hot air pipeline 2 as far as possible.
Optionally, the air inlet of the hot air duct 2 is provided with a collector, and the collector is used for enabling hot air on the air cooling island 1 to uniformly enter the hot air duct 2. It will be appreciated that the area of the current collector may be determined by calculation from the distance between its current collector and the air cooling island 1.
Optionally, the joint of the air outlet pipe 4 and the boiler 5 to be preheated is located at the bottom of the boiler 5 to be preheated, and the axis of the air outlet of the joint of the air outlet pipe 4 and the boiler 5 to be preheated is perpendicular to the axis of the boiler 5 to be preheated. Because the density of the hot air is low, the hot air can move upwards in the boiler 5 to be preheated, the connection position of the air outlet pipeline 4 and the boiler 5 to be preheated is positioned at the bottom of the boiler 5 to be preheated, and the axis of the air outlet of the connection position of the air outlet pipeline 4 and the boiler 5 to be preheated is perpendicular to the axis of the boiler 5 to be preheated, so that the hot air led into the boiler 5 to be preheated can heat the whole interior of the boiler 5 to be preheated from the bottom of the boiler 5 to be preheated, and the condition that the interior of the boiler 5 to be preheated is not uniformly heated is reduced.
Optionally, the axes corresponding to the fan 3, the air inlet pipeline 7 and the air outlet pipeline 4 are located on the same straight line, and it can be understood that the air paths passing through the air inlet pipeline 7, the fan 3 and the air outlet pipeline 4 are on the same straight line, so that the air paths are less obstructed, and the air guide performance of the fan 3 is improved.
Optionally, the fan 3 is an axial fan. The air exhaust direction of the axial flow fan is in straight line along the axial direction, and the air inlet and the air outlet of the fan are on the same axial line.
It should be noted that the above-mentioned application contents and the detailed description are intended to demonstrate the practical application of the technical solutions provided in the present application, and should not be construed as limiting the scope of the present application. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the present application. The protection scope of this application is subject to the appended claims.
Claims (10)
1. A boiler preheating system, comprising: the system comprises an air cooling island, a hot air pipeline, a fan, an air outlet pipeline, a boiler to be preheated and a first boiler;
the steam turbine generator unit of the first boiler is connected with the air cooling island, and the air cooling island is used for cooling the dead steam of the steam turbine generator unit of the first boiler so as to generate hot air and discharge the hot air from an air outlet of the air cooling island;
the air inlet of the hot air pipeline is positioned above the air outlet of the air cooling island and is used for receiving and conducting hot air discharged from the air outlet of the air cooling island;
one end of the fan is connected with the hot air pipeline, and the other end of the fan is connected with the boiler to be preheated through the air outlet pipeline so as to guide hot air in the hot air pipeline to blow into the boiler to be preheated.
2. The boiler preheating system according to claim 1, further comprising an inlet air duct;
and one end of the air inlet pipeline is connected with the outside, and the other end of the air inlet pipeline is connected with the fan and is used for connecting an air inlet of the fan with the outside.
3. The boiler preheating system according to claim 2, wherein a first baffle is disposed in each of the hot air duct and the air inlet duct, and the first baffle is configured to control communication or disconnection between an air inlet of the fan and the outside of the hot air duct and the outside of the air inlet duct, respectively.
4. The boiler preheating system according to claim 1, wherein the number of the fans is equal to the number of the fans, and one end of each fan is connected to a hot air duct, and the other end of each fan is connected to the boiler to be preheated.
5. The boiler preheating system according to claim 1, wherein a second baffle is disposed in the air outlet duct, and the second baffle is configured to control a communication or disconnection isolation state between the air outlet of the fan and the boiler to be preheated.
6. The boiler preheating system according to any one of claims 1 to 5, wherein the axial direction of the air inlet of the hot air duct is perpendicular to the ground.
7. The boiler preheating system according to any one of claims 1 to 5, wherein the air inlet of the hot air duct is provided with a current collector for uniformly feeding the hot air on the air cooling island into the hot air duct.
8. The boiler preheating system according to any one of claims 1 to 5, wherein a connection point of the air outlet pipeline and the boiler to be preheated is located at the bottom of the boiler to be preheated, and an air outlet axis of the connection point of the air outlet pipeline and the boiler to be preheated is perpendicular to an axis of the boiler to be preheated.
9. The boiler preheating system according to any one of claims 1 to 5, wherein corresponding axes of the fan and the air outlet duct are located on the same straight line.
10. The boiler preheating system according to claim 9, wherein the fan is an axial fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220306608.7U CN217816692U (en) | 2022-02-15 | 2022-02-15 | Boiler preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220306608.7U CN217816692U (en) | 2022-02-15 | 2022-02-15 | Boiler preheating system |
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| Publication Number | Publication Date |
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| CN217816692U true CN217816692U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220306608.7U Active CN217816692U (en) | 2022-02-15 | 2022-02-15 | Boiler preheating system |
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| CN (1) | CN217816692U (en) |
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- 2022-02-15 CN CN202220306608.7U patent/CN217816692U/en active Active
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