CN219120551U - Combustion system of coal-fired boiler - Google Patents
Combustion system of coal-fired boiler Download PDFInfo
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- CN219120551U CN219120551U CN202223479229.7U CN202223479229U CN219120551U CN 219120551 U CN219120551 U CN 219120551U CN 202223479229 U CN202223479229 U CN 202223479229U CN 219120551 U CN219120551 U CN 219120551U
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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 relates to the technical field of coal-fired boilers, in particular to a combustion system of a coal-fired boiler, which comprises a boiler water-cooled wall, wherein the boiler water-cooled wall is provided with the combustion system, a coke-preventing air system and a heat control element; the combustion system is arranged on a water-cooled wall of the boiler, and the anti-coking wind system and the thermal control element are arranged at the downstream of the combustion system according to the rotation direction of the combustion system; the system Jiao Fengji is for supplying air to the combustion system, and the thermal control element is arranged around the anti-coking system for detecting the temperature and the reducing atmosphere downstream of the combustion system. By arranging the anti-coking wind system, the utility model not only can avoid coking at four corners of the furnace wall, but also can avoid high-temperature corrosion at four corners of the furnace wall.
Description
Technical Field
The utility model relates to the technical field of coal-fired boilers, in particular to a combustion system of a coal-fired boiler.
Background
In the pulverized coal boiler adopting the four-corner tangential firing mode, coking and high-temperature corrosion are easy to occur on the four-corner wall surfaces due to the characteristics of coal types and improper regulation and control in the boiler operation process, and huge hidden troubles are brought to the safe operation of the boiler. To this end, we propose a combustion system for a coal-fired boiler.
Disclosure of Invention
The utility model aims to provide a combustion system of a coal-fired boiler, which can avoid coking at four corners of a furnace wall and high-temperature corrosion at four corners of the furnace wall through the arrangement of a coke-preventing air system.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a combustion system of coal-fired boiler, includes boiler water-cooling wall, install combustion system, anti-burnt wind system, thermal control element on the boiler water-cooling wall, combustion system arranges on the boiler water-cooling wall, anti-burnt wind system and thermal control element arrange in combustion system's low reaches according to combustion system's direction of rotation, thermal control element arranges around anti-burnt wind system.
Preferably, the combustion system is arranged at four corners of the water-cooled wall of the boiler, and the combustion system, the anti-coking wind system and the thermal control element are all 4 groups.
Preferably, the Jiao Fengji preventing system comprises an air supply system, a furnace side preventing Jiao Fengshi, a valve group and an air outlet, wherein the air outlet faces to the hearth.
Preferably, the air supply system adopts the primary air or adopts a blower to supply air.
Preferably, the thermal control element is provided with a plurality of CO meters, H 2 S measuring instrument.
Preferably, the anti-Jiao Fengji system pipeline is provided with a stop valve and a regulating valve.
Preferably, the air quantity occupied by the anti-coking air system is 0.2% -1% of the total air quantity of the boiler.
Preferably, the boiler water-cooled wall is arranged in a manner of a thin pipe, and the air outlet structure is a diaphragm structure.
Preferably, the boiler water-cooling wall adopts a fin type boiler water-cooling wall, and different air openings are formed in fins of the boiler water-cooling wall.
Compared with the prior art, the utility model has the following beneficial effects:
by arranging a coke-preventing air system, a thermal control element temperature and CO and H at the downstream of each combustion system 2 S (reducing atmosphere) measuring instrument, when the boiler is started, the starting of the anti-coking air system and the adjustment of the air quantity are selected through the actual measurement values of the temperature and the reducing atmosphere at the downstream of the combustion system. Thereby avoiding coking at four corners of the furnace wall and avoiding high-temperature corrosion at four corners of the furnace wall.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a water wall of a boiler in accordance with the present utility model;
FIG. 3 is a schematic view of a water wall of a boiler according to the present utility model.
In the figure: 1. a boiler water cooling wall; 2. a combustion system; 3. a scorching prevention system; 4. a thermal control element; 5. a stop valve; 6. a regulating valve; 7. fins; 8. an air port; 9. a thin tube.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the combustion system of the coal-fired boiler comprises a boiler water wall 1, wherein the boiler water wall 1 is provided with a combustion system 2, a coke-preventing wind system 3 and a thermal control element 4; the combustion system 2 is arranged at four corners of the boiler water wall 1, and the combustion system 2, the anti-coking air system 3 and the thermal control elements 4 are all 4 groups.
The combustion system 2 is arranged on the wall of the boiler water wall 1, and the anti-coking wind system 3 and the thermal control element 4 are arranged downstream of the combustion system 2 according to the rotation direction (see arrow direction in fig. 1) of the combustion system 2;
the anti-coking wind system 3 is used for supplying wind to the combustion system 2, and the thermal control element 4 is arranged around the anti-coking wind system 3 for detecting the temperature and the reducing atmosphere downstream of the combustion system 2.
According to the condition of the boiler burning coal, a certain temperature control element 4, CO and H are arranged at the downstream of each combustion system 2 2 S (reducing atmosphere) measuring instrument, when the boiler is started, the opening of the anti-coking air system 3 and the adjustment of the air quantity are selected by the actual measurement values of the temperature and the reducing atmosphere at the downstream of the combustion system 2.
The anti-coking air system 3 comprises an air supply system, a furnace side anti-coking Jiao Fengshi, a valve group and an air outlet, wherein the air outlet faces to the hearth. The air supply system adopts direct reference primary air or adopts a blower to supply air.
The thermal control element 4 is provided with a plurality of CO and H according to the size of the boiler water wall 1 2 S measuring instrument. CO measuring instrument and H 2 S-meter monitoring CO and H 2 S content by measuring CO and H 2 S, whether the combustion in the furnace is anoxic or not can be judged.
A stop valve 5 and a regulating valve 6 are arranged on the pipeline of the anti-coking air system 3. For opening and closing the anti-coking air system 3 and adjusting the air quantity according to the combustion condition of the combustion system 2. The air quantity of the anti-coking air is 0.2% -1% of the total air quantity of the boiler, and the anti-coking air quantity is different according to different coal types.
As shown in fig. 2, when the fin type boiler water wall 1 is adopted as the boiler water wall 1, different air ports 8 are formed in the fins 7 according to different heat loads of the boiler section. As shown in fig. 3, when the boiler water wall 1 is arranged in a manner of a thin pipe 9, the air outlet structure is a membrane structure. Each air outlet of the anti-coking air system 3 adopts different arrangement modes according to different structural types of the boiler water wall 1 pipes, and the air outlet faces the hearth.
In use, a plurality of CO meters, H, through the thermal control element 4 2 S measuring instrument monitors actual measurement value of reducing atmosphere downstream of combustion system 2 and communicatesWhen the actual measurement value of the reducing atmosphere reaches a set value and the temperature is lower than the set value, any one item or two items are met, the anti-coking air system 3 is started to supply air for the combustion system 2, and the air quantity is adjusted according to the actual measurement data, so that coking at four corners of a furnace wall and high-temperature corrosion at four corners of the furnace wall are finally avoided.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A combustion system for a coal-fired boiler comprising a boiler water wall, characterized by: the boiler water cooling wall (1) is provided with a combustion system (2), a coke-preventing wind system (3) and a thermal control element (4);
the combustion system (2) is arranged on the boiler water wall (1), and the Jiao Fengji preventing system (3) and the thermal control element (4) are arranged at the downstream of the combustion system (2) according to the rotation direction of the combustion system (2);
the anti-Jiao Fengji system (3) is used for supplying air to the combustion system (2), and the thermal control element (4) is arranged around the anti-coking wind system (3) and is used for detecting the temperature and the reducing atmosphere downstream of the combustion system (2).
2. The combustion system of a coal-fired boiler as set forth in claim 1, wherein: the combustion system (2) is arranged at four corners of the boiler water wall (1), and the combustion system (2), the anti-coking air system (3) and the thermal control element (4) are all 4 groups.
3. A combustion system of a coal-fired boiler according to claim 1 or 2, characterized in that: the anti-Jiao Fengji system (3) comprises an air supply system, a furnace side anti-Jiao Fengshi, a valve group and an air outlet, wherein the air outlet faces towards the hearth.
4. A combustion system of a coal-fired boiler according to claim 3, characterized in that: the air supply system adopts primary air or adopts a blower to supply air.
5. A combustion system of a coal-fired boiler according to claim 1 or 2, characterized in that: the thermal control element (4) is provided with a plurality of CO measuring instruments and H 2 S measuring instrument.
6. A combustion system of a coal-fired boiler according to claim 1 or 2, characterized in that: a stop valve (5) and a regulating valve (6) are arranged on the pipeline of the anti-Jiao Fengji system (3).
7. The combustion system of a coal-fired boiler as set forth in claim 1, wherein: the air quantity occupied by the Jiao Fengji prevention system (3) is 0.2% -1% of the total air quantity of the boiler.
8. The combustion system of a coal-fired boiler as set forth in claim 1, wherein: the boiler water-cooling wall (1) is arranged in a manner of a thin-film tube (9), and the air outlet structure is a diaphragm structure.
9. The combustion system of a coal-fired boiler as set forth in claim 1, wherein: the boiler water-cooling wall (1) adopts a fin type boiler water-cooling wall (1), and different air openings (8) are formed in fins (7) of the boiler water-cooling wall (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223479229.7U CN219120551U (en) | 2022-12-26 | 2022-12-26 | Combustion system of coal-fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223479229.7U CN219120551U (en) | 2022-12-26 | 2022-12-26 | Combustion system of coal-fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219120551U true CN219120551U (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223479229.7U Active CN219120551U (en) | 2022-12-26 | 2022-12-26 | Combustion system of coal-fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219120551U (en) |
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2022
- 2022-12-26 CN CN202223479229.7U patent/CN219120551U/en active Active
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