CN110220189B - Method for improving slag discharging efficiency of boiler - Google Patents
Method for improving slag discharging efficiency of boiler Download PDFInfo
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- CN110220189B CN110220189B CN201910520637.6A CN201910520637A CN110220189B CN 110220189 B CN110220189 B CN 110220189B CN 201910520637 A CN201910520637 A CN 201910520637A CN 110220189 B CN110220189 B CN 110220189B
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- slag
- discharge port
- directional
- slag discharge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to a method for improving slag discharging efficiency of a boiler, which comprises the following steps of respectively arranging more than two bell-type blast caps at the periphery of a slag discharging port, respectively arranging more than two directional blast caps between the bell-type blast caps and the slag discharging port, and enabling the bell-type blast caps and the directional blast caps to be in a ventilation state; judging whether the slag amount of the slag around the slag discharge port is larger than a preset value or not; if the slag amount around the slag discharge port is larger than the preset value, the direction of the air outlet of the directional blast cap is adjusted to enable the air outlet of the directional blast cap to face the periphery of the slag discharge port, more than two directional blast caps form annular air flow around the slag discharge port, and the slag around the slag discharge port is blown into the slag discharge port until the slag amount around the slag discharge port is smaller than the preset value. Compared with the prior art, the invention strengthens the disturbance at the slag discharge port through the directional blast cap, and ensures that large-particle materials flow and slag discharge is smooth; the workload of personnel is reduced, and the potential safety hazard is avoided.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a method for improving boiler slag discharging efficiency.
Background
The boiler slag is required to be continuously discharged in order to ensure the continuous and safe operation of the boiler, most boilers adopt solid slag discharge, and a few boilers adopt liquid slag discharge, and the slag discharge quantity is related to the capacity of the boiler, the type of coal and the combustion mode.
The slag discharging mode of the circulating fluidized bed boiler comprises side slag discharging and bottom slag discharging. The side deslagging does not affect the fluidization state of air distribution, but insufficient deslagging power is caused if the thickness of the bed layer is not high. The bottom slag discharge port occupies the area of the air distribution plate and influences the fluidization state of the air distribution plate, but the slag discharge power is larger, so that slag discharge is facilitated.
In the prior art, four slag outlets with the diameter of 219mm are arranged on one hearth air distribution plate, and the area around the slag outlets forms a fluidization dead zone due to the large pipe diameter of the slag outlets, so that fluidization is poor, a large amount of coarse particles are deposited continuously, slag discharge is unsmooth, manual dredging is performed continuously in a high-temperature area, the danger is high, and the thermal efficiency of a boiler is reduced.
Disclosure of Invention
Therefore, it is necessary to provide a method for improving the slag discharging efficiency of the boiler, which is used for solving the technical problems in the prior art.
In order to achieve the above object, the inventor provides a method for improving the slag discharging efficiency of a boiler, comprising the following steps:
more than two bell-type blast caps are respectively arranged at the periphery of a slag discharge hole, more than two directional blast caps are respectively arranged between the bell-type blast caps and the slag discharge hole, and the bell-type blast caps and the directional blast caps are in a ventilation state;
the boiler starts to operate, and whether the slag amount of the slag around the slag discharging port is larger than a preset value is detected;
if the slag amount around the slag discharge port is larger than the preset value, the direction of an air outlet of the directional blast cap is adjusted to enable the air outlet of the directional blast cap to face the periphery of the slag discharge port, more than two directional blast caps form annular air flow around the slag discharge port, and the slag around the slag discharge port is blown into the slag discharge port until the slag amount around the slag discharge port is smaller than the preset value;
otherwise, the operation is normal.
As a preferable structure of the invention, six directional blast caps are arranged around the slag discharge port.
As a preferable structure of the invention, the air outlet of the directional hood is axially angled by 30-60 degrees.
In a preferred structure of the present invention, the diameter of the bell-type hood is 50 mm.
As a preferred structure of the invention, the diameter of the directional hood is 45 mm.
As a preferable structure of the present invention, the outlet of the directional hood faces in a horizontal direction.
As a preferred structure of the present invention, the height of the air outlet in the vertical direction is adjusted by the air outlet of the directional hood through a telescopic mechanism, and the orientation of the air outlet is adjusted by the air outlet of the directional hood through a rotating mechanism.
Different from the prior art, the technical scheme is that more than two bell-type blast caps are respectively arranged at the periphery of the slag discharge port, more than two directional blast caps are respectively arranged between the bell-type blast caps and the slag discharge port, the boiler starts to operate, and whether the slag amount around the slag discharge port is larger than a preset value is detected; if the slag amount around the slag discharge port is larger than the preset value, the direction of the air outlet of the directional blast cap is adjusted to enable the air outlet of the directional blast cap to face the periphery of the slag discharge port, more than two directional blast caps form annular air flow around the slag discharge port, and the slag around the slag discharge port is blown into the slag discharge port until the slag amount around the slag discharge port is smaller than the preset value. Therefore, annular air flow is formed around the slag discharge port through the matching of the bell-type blast cap and the directional blast cap, large-particle slag flow is promoted to fall into the slag discharge port, and the normal fluidization of the area is ensured. The directional blast cap strengthens the disturbance at the slag discharge port, large-particle materials flow, and smooth slag discharge is ensured; the workload of personnel is reduced, and the potential safety hazard is avoided.
Drawings
FIG. 1 is a schematic structural view of the arrangement of the wind caps on the wind distribution plate according to the embodiment;
FIG. 2 is a schematic structural view of a directional hood according to an embodiment;
FIG. 3 is a schematic flow chart illustrating a method for improving the boiler slagging efficiency according to an embodiment.
Description of reference numerals:
1. the air distribution plate is arranged on the air distribution plate,
2. the periphery of the slag discharging port is provided with a slag discharging hole,
3. a slag discharging port is arranged at the bottom of the slag discharging pipe,
4. the direction-oriented wind cap is arranged on the wind tunnel,
5. an air outlet is arranged on the air outlet,
8. a bell-type hood.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 3, the present embodiment relates to a slag discharging structure of a circulating fluidized bed boiler, wherein a bottom slag discharging manner is adopted in the present embodiment, a bottom slag discharging port 3 is disposed on an air distribution plate 1, and in a specific embodiment, one air distribution plate 1 is provided with four slag discharging ports 3. More than two bell-type wind caps 8 and more than two directional wind caps 4 are arranged around the four slag discharge ports 3. The bell-type blast cap 8 is arranged around the slag discharge port 3, and the exhaust direction of the bell-type blast cap 8 is blowing air to the periphery without a fixed exhaust direction. The directional blast cap 4 is arranged between the bell-type blast cap 8 and the slag discharge port 3, and the directional blast cap 4 can adjust the direction of air exhaust and adjust the air pressure.
In a specific embodiment, at least six bell-type blast caps 8 are arranged around one slag discharge port 3, and the six bell-type blast caps 8 are annularly distributed at equal angles with the slag discharge port 3 as a center. At least six directional blast caps 4 are arranged around one slag discharge port 3, and the six directional blast caps 4 are annularly distributed at equal angles by taking the slag discharge port 3 as a center. The six directional hoods 4 and the six bell-type hoods 8 are arranged in a staggered mode. The air outlets 5 of the six directional air caps 4 face the periphery 2 of the slag discharging port.
Optionally, the air outlet 5 of the directional hood 4 is axially angled by 30-60 degrees.
Optionally, the diameter of the bell hood 8 is 50 mm.
Optionally, the diameter of the directional hood 4 is 45 mm.
In particular, the first row is arranged around the slag discharge port 3
The directional blast cap 4 is designed to spray ∠ 45 axially, and annular blast flow is formed around the slag discharge port 3 to promote large-particle slag to flow into the slag discharge port 3 and ensure normal fluidization of the area, and the diameter of the directional blast cap 4 is smaller than that of the bell-type blast cap 8, so that the blast pressure of the directional blast cap 4 is increased.
As shown in fig. 2, the outlet 5 of the directional hood 4 faces in the horizontal direction. The air inlet of the directional blast cap 4 is arranged at the bottom of the directional blast cap 4, and the directional blast cap 4 changes the vertical wind into the horizontal wind, so that the slag in the periphery 2 of the slag discharging port is blown into the slag discharging port 3.
In other embodiments, the height of the air outlet 5 in the vertical direction is adjusted by the air outlet 5 of the directional hood 4 through a telescopic mechanism, and the orientation of the air outlet 5 is adjusted by the air outlet 5 of the directional hood 4 through a rotating mechanism. Thus, the height and angle of the outlet 5 can be adjusted by the cooperation of the telescopic mechanism and the rotating mechanism, and air in various directions can be blown out.
As shown in fig. 3, the present embodiment particularly relates to a method for improving slag discharging efficiency of a boiler, which comprises the following steps:
s101, respectively arranging more than two bell-type blast caps 8 around a slag discharge port 3, respectively arranging more than two directional blast caps 4 between the bell-type blast caps 8 and the slag discharge port 3, and enabling the bell-type blast caps 8 and the directional blast caps 4 to be in a ventilation state;
the boiler starts to operate, and whether the slag amount of the slag around the slag discharging port 3 is larger than a preset value is judged;
s102, if the slag amount around the slag discharge port 3 is larger than a preset value, adjusting the direction of an air outlet 5 of a directional blast cap 4 to enable the air outlet 5 of the directional blast cap 4 to face the periphery of the slag discharge port 3, enabling more than two directional blast caps 4 to form annular air flow around the slag discharge port 3, and blowing the slag around the slag discharge port 3 into the slag discharge port 3 until the slag amount of the slag around the slag discharge port 3 is smaller than the preset value;
s103, if the slag amount around the slag discharging port 3 is smaller than a preset value, the operation is normal.
The slag discharging port 3 detects the slag amount around the slag discharging port 3 through a pressure sensor, and a preset value is set through actual conditions.
The difference prior art, this embodiment forms annular air current around slag notch 3 through the cooperation of bell jar formula hood 8 and directional hood 4, promotes that large granule sediment flows and falls into slag notch 3, guarantees that this region can normally fluidize simultaneously. The directional blast cap 4 strengthens the disturbance at the slag discharge port 3, and large-particle materials flow up to ensure smooth slag discharge; the workload of personnel is reduced, and the potential safety hazard is avoided.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (6)
1. A method for improving the slag discharging efficiency of a boiler is characterized by comprising the following steps:
more than two bell-type blast caps are respectively arranged at the periphery of a slag discharge hole, more than two directional blast caps are respectively arranged between the bell-type blast caps and the slag discharge hole, and the bell-type blast caps and the directional blast caps are in a ventilation state;
the boiler starts to operate, and whether the slag amount of the slag around the slag discharging port is larger than a preset value is detected;
if the slag amount around the slag discharge port is larger than the preset value, the direction of an air outlet of the directional blast cap is adjusted to enable the air outlet of the directional blast cap to face the periphery of the slag discharge port, more than two directional blast caps form annular air flow around the slag discharge port, and the slag around the slag discharge port is blown into the slag discharge port until the slag amount around the slag discharge port is smaller than the preset value;
otherwise, the operation is normal;
the air outlet of the directional hood is adjusted in height in the vertical direction through a telescopic mechanism, and the air outlet of the directional hood is adjusted in orientation through a rotating mechanism.
2. The method for improving boiler slag discharging efficiency according to claim 1, wherein: six directional blast caps are arranged around the slag discharge port.
3. The method for improving boiler slag discharging efficiency according to claim 1, wherein: the air outlet of the directional hood is axially at an angle of 30-60 degrees.
4. The method for improving boiler slag discharging efficiency according to claim 1, wherein: the diameter of the bell-type hood is 50 mm.
5. The method for improving boiler slag discharging efficiency according to claim 1, wherein: the diameter of the directional hood is 45 mm.
6. The method for improving boiler slag discharging efficiency according to claim 1, wherein: and the air outlet of the directional hood faces to the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520637.6A CN110220189B (en) | 2019-06-17 | 2019-06-17 | Method for improving slag discharging efficiency of boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520637.6A CN110220189B (en) | 2019-06-17 | 2019-06-17 | Method for improving slag discharging efficiency of boiler |
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| Publication Number | Publication Date |
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| CN110220189A CN110220189A (en) | 2019-09-10 |
| CN110220189B true CN110220189B (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910520637.6A Active CN110220189B (en) | 2019-06-17 | 2019-06-17 | Method for improving slag discharging efficiency of boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405105B (en) * | 2021-07-07 | 2022-07-22 | 长兴新城环保有限公司 | Slag coking prevention device of circulating fluidized bed garbage incinerator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885240U (en) * | 2010-11-02 | 2011-06-29 | 无锡爱姆迪环保科技有限公司 | Intelligent sludge incinerator |
| CN108980840A (en) * | 2018-08-23 | 2018-12-11 | 浙江利欧环保科技有限公司 | It is a kind of for handling the equipment and its processing method of house refuse |
| CN208620342U (en) * | 2018-08-01 | 2019-03-19 | 联盛纸业（龙海）有限公司 | A kind of raising air distribution plate resistance and be conducive to deslagging smoothly device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7464669B2 (en) * | 2006-04-19 | 2008-12-16 | Babcock & Wilcox Power Generation Group, Inc. | Integrated fluidized bed ash cooler |
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- 2019-06-17 CN CN201910520637.6A patent/CN110220189B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885240U (en) * | 2010-11-02 | 2011-06-29 | 无锡爱姆迪环保科技有限公司 | Intelligent sludge incinerator |
| CN208620342U (en) * | 2018-08-01 | 2019-03-19 | 联盛纸业（龙海）有限公司 | A kind of raising air distribution plate resistance and be conducive to deslagging smoothly device |
| CN108980840A (en) * | 2018-08-23 | 2018-12-11 | 浙江利欧环保科技有限公司 | It is a kind of for handling the equipment and its processing method of house refuse |
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| CN110220189A (en) | 2019-09-10 |
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