CN116857666A - Soot blowing steam source device of supercritical unit boiler - Google Patents
Soot blowing steam source device of supercritical unit boiler Download PDFInfo
- Publication number
- CN116857666A CN116857666A CN202310737422.6A CN202310737422A CN116857666A CN 116857666 A CN116857666 A CN 116857666A CN 202310737422 A CN202310737422 A CN 202310737422A CN 116857666 A CN116857666 A CN 116857666A
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- China
- Prior art keywords
- pipeline
- soot blowing
- soot
- steam source
- air preheater
- 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.)
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- 239000004071 soot Substances 0.000 title claims abstract description 174
- 238000007664 blowing Methods 0.000 title claims abstract description 120
- 238000002955 isolation Methods 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 12
- 239000003245 coal Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to the technical field of air pre-heaters, in particular to a soot blowing steam source device of a boiler of a supercritical unit. The invention independently guides a path of soot blowing pipeline to separate the air preheater soot blower from the boiler body soot blower from the rear of the soot blowing steam source regulating door of the boiler body, which not only can ensure the steam supply of the air preheater when continuously blowing the soot, but also can solve the problems of unstable steam supply pressure from auxiliary steam to the air preheater and long-term compression before the lifting of the boiler body soot blower.
Description
Technical Field
The invention relates to the technical field of air pre-heaters, in particular to a soot blowing steam source device of a boiler of a supercritical unit.
Background
The air preheater soot blowing steam source consists of two parts, one part is from the auxiliary steam source to the air preheater soot blowing steam source, and the other part is from the boiler body soot blowing steam source. When the ash content of the coal variety change is large, the air preheater is required to be continuously blown to ash in order to prevent the air preheater from being blocked. Because the auxiliary steam pressure is linked with the load change of the unit, sometimes the auxiliary steam supply pressure is less than 1MPa, and the requirement of the air preheater on the soot blowing steam source pressure cannot be met. When the air preheater soot blowing steam source adopts the boiler body soot blowing steam source, all soot blowers of the boiler body are communicated with the boiler body soot blowing steam source, when the air preheater soot blowing is carried out, the front of other boiler body soot blower lift valves are under pressure, when the boiler body soot blower lift valves are not tight and leak inwards, the heating surface of the boiler body is damaged by flushing, and when serious, the heating surface is exploded, and a unit is stopped.
The prior art has the following problems:
1. as the combustion coal type of the boiler changes, when the ash content of the coal type changes greatly, in order to prevent the air preheater from being blocked, the pressure difference between the inlet and the outlet of the air preheater becomes large, and the air preheater needs to continuously blow ash.
2. The air preheater soot blowing steam source is provided by two parts, one part is from the auxiliary steam source to the air preheater soot blowing steam source, and the other part is from the boiler body soot blowing steam source. Because the auxiliary steam pressure is linked with the load change of the unit, the low load sometimes has the auxiliary steam supply pressure less than 1MPa and cannot meet the soot blowing condition, so that the continuous soot blowing steam source of the air preheater can only be taken from the soot blowing steam source of the boiler body.
3. When the air preheater soot blowing steam source is provided by the boiler body soot blowing steam source, because the air preheater soot blower and the boiler body soot blower, the hearth long soot blower and the economizer soot blower belong to the same system, when the air preheater soot blowing is carried out, the front of the other boiler body soot blowers are also pressurized, if the soot blowers leak in the poppet valves under the condition of not blowing, the internal leakage steam can wash the damaged heating surface, and the safety operation of the heating surface is threatened.
Disclosure of Invention
Aiming at the problems, the invention provides a soot blowing steam source device of a boiler of a supercritical unit.
The invention provides a boiler soot blowing steam source device of a supercritical unit, which comprises:
a first pipeline from the boiler body to the hearth soot blower, wherein a soot blowing safety valve 4 is arranged on the first pipeline;
a second pipeline leading to the pin removal soot blower is connected between the first pipeline soot blowing safety valve 4 and the hearth soot blower, and a denitration check valve is arranged on the second pipeline;
a third pipeline leading to the air preheater is connected between the second pipeline denitration check valve and the pin removal soot blower;
a fourth pipeline leading to the air preheater is arranged between the connection point of the first pipeline and the second pipeline and the soot blowing safety valve 4.
Further, a newly added active electric door 5 is arranged on the first pipeline between the connection point of the first pipeline and the second pipeline and the connection point of the first pipeline and the fourth pipeline.
Further, a newly-increased air preheater soot blowing steam source electric door 7 is arranged on the fourth pipeline between the connection point of the first pipeline and the fourth pipeline and the connection point of the fourth pipeline and the third pipeline.
Further, a new air preheater soot blowing steam source manual door 6 is arranged between the connection point of the first pipeline and the fourth pipeline and between the connection point of the fourth pipeline and the third pipeline.
Further, the apparatus further comprises: and a fifth pipeline from the auxiliary steam to the air preheater.
Further, a soot blowing isolation door 8 of the auxiliary steam to air preheater and a soot blowing check door 9 of the auxiliary steam to air preheater are arranged on the fifth pipeline.
Further, a soot blowing steam source adjusting door 3 is arranged between the boiler body and the soot blowing safety valve 4 on the first pipeline.
Further, a soot blowing steam source manual door 1 and a soot blowing steam source electric door 2 are arranged between the boiler body and the soot blowing steam source adjusting door 3 on the first pipeline.
Further, a denitration soot blower end of the second pipeline is provided with a denitration soot blower isolation door 11.
Further, one end of the fourth pipeline, which is close to the air preheater, is provided with an air preheater soot blowing isolation door 12.
The invention has at least the following beneficial effects:
the invention independently guides a path of soot blowing pipeline to separate the air preheater soot blower from the boiler body soot blower from the rear of the soot blowing steam source regulating door of the boiler body, which not only can ensure the steam supply of the air preheater when continuously blowing the soot, but also can solve the problems of unstable steam supply pressure from auxiliary steam to the air preheater and long-term compression before the lifting of the boiler body soot blower.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a soot blowing steam source device according to an embodiment of the present invention.
In the accompanying drawings: 1-a soot blowing steam source manual door; 2-soot blowing steam source electric door; 3-soot blowing steam source adjusting door; 4-soot blowing safety valve; 5-adding a new active electric door; 6-a soot blowing steam source manual door of the new air preheater; 7-a soot blowing steam source electric door of the new air preheater; 8-auxiliary steam to air preheater soot blowing isolation door; 9-auxiliary steam to a soot blowing check valve of the air preheater; 10-out-of-stock check door; 11-out-of-stock soot blowing isolation door; 12-soot blowing isolation door of air preheater.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the prior art, when the air preheater soot blowing steam source is provided by the boiler body soot blowing steam source, because the air preheater soot blower, the boiler body soot blower, the hearth long soot blower and the economizer soot blower belong to the same system, when the air preheater soot blower blows, the front of the other boiler body soot blowers are also pressurized, if the soot blowers leak in the lift valves under the condition of not blowing, the leaked steam can wash the damaged heating surface, and the safe operation of the heating surface is threatened.
According to the invention, a soot blowing pipeline is independently led to separate the air preheater soot blower from the boiler body soot blower after the boiler body soot blowing steam source regulating door 3, so that the steam supply of the air preheater during continuous soot blowing can be ensured, and the problems of unstable steam supply pressure from auxiliary steam to the air preheater and long-term compression before the boiler body soot blower is lifted can be solved.
As shown in FIG. 1, the invention provides a boiler soot blowing steam source device of a supercritical unit, which comprises:
a first pipeline from the boiler body to the hearth soot blower, wherein a soot blowing safety valve 4 is arranged on the first pipeline;
a second pipeline leading to the pin removal soot blower is connected between the first pipeline soot blowing safety valve 4 and the hearth soot blower, and a denitration check valve is arranged on the second pipeline;
a third pipeline leading to the air preheater is connected between the second pipeline denitration check valve and the pin removal soot blower;
a fourth pipeline leading to the air preheater is arranged between the connection point of the first pipeline and the second pipeline and the soot blowing safety valve 4.
In an embodiment, a newly added active electric door 5 is arranged on the first pipeline between the connection point of the first pipeline and the second pipeline and the connection point of the first pipeline and the fourth pipeline.
In one embodiment, a newly-increased ash blowing steam source electric door 7 of the air preheater is arranged on the fourth pipeline between the connection point of the first pipeline and the fourth pipeline and the connection point of the fourth pipeline and the third pipeline.
In an embodiment, a new air preheater soot blowing steam source manual door 6 is further arranged on the fourth pipeline between the connection point of the first pipeline and the fourth pipeline and the connection point of the fourth pipeline and the third pipeline.
In one embodiment, the apparatus further comprises: and a fifth pipeline from the auxiliary steam to the air preheater.
In one embodiment, the fifth pipeline is provided with an auxiliary steam-to-air preheater soot blowing isolation door 8 and an auxiliary steam-to-air preheater soot blowing check door 9.
In one embodiment, a soot blowing steam source regulating door 3 is arranged between the boiler body and the soot blowing safety valve 4 on the first pipeline.
In one embodiment, a soot blowing steam source manual door 1 and a soot blowing steam source electric door 2 are arranged between the boiler body and the soot blowing steam source adjusting door 3 on the first pipeline.
In one embodiment, one end of the second pipeline, which is close to the denitration soot blower, is provided with a denitration soot blowing isolation door 11.
In one embodiment, the fourth pipeline is provided with a soot blowing isolation door 12 of the air preheater near one end of the air preheater.
In order for those skilled in the art to better understand the present invention, the principles of the present invention are described below with reference to the accompanying drawings:
the air preheater soot blowing steam source consists of two parts, one part is from the auxiliary steam source to the air preheater soot blowing steam source, and the other part is from the boiler body soot blowing steam source. When the ash content of the coal variety change is large, the air preheater is required to be continuously blown to ash in order to prevent the air preheater from being blocked. Because the auxiliary steam pressure is linked with the load change of the unit, sometimes the auxiliary steam supply pressure is less than 1MPa, and the requirement of the air preheater on the soot blowing steam source pressure cannot be met. When the air preheater soot blowing steam source adopts the boiler body soot blowing steam source, all soot blowers of the boiler body are communicated with the boiler body soot blowing steam source, when the air preheater soot blowing is carried out, the front of other boiler body soot blower lift valves are under pressure, when the boiler body soot blower lift valves are not tight and leak inwards, the heating surface of the boiler body is damaged by flushing, and when serious, the heating surface is exploded, and a unit is stopped.
If the air preheater soot blower is separated from the boiler body soot blower by independently leading a soot blowing pipeline from the boiler body soot blowing steam source regulating door 3, the steam supply of the air preheater during continuous soot blowing can be ensured, and the problems of unstable steam supply pressure from auxiliary steam to the air preheater and long-term compression before the boiler body soot blower is lifted can be solved.
Considering that all systems mutually blow-by after the pipeline is transformed, the pipeline leading-out point is led out from the boiler body soot blowing steam source after the regulation of the valve, and is additionally provided with an isolation door, and the junction is connected to the boiler body to the air preheater check valve and the auxiliary steam to the air preheater soot blowing check valve 9.
The on-site investigation pipeline laying space is enough, and the scheme is feasible.
The scheme is implemented in 7 to 9 months of 2022, and the modification technology is implemented on the No. 1 unit of our factory temporarily. After the 2022 month 1 unit is started, the system is put into operation, the steam source of the boiler body to the soot blower is separated from the steam source pipeline of the boiler body soot blower, the boiler body soot blower is not pressed when the air preheater soot blower blows the soot, the pressure is not applied before the poppet valve of the boiler body soot blower, the potential safety hazard of flushing the heating surface and damaging the heating surface due to the non-tight poppet valve is eliminated, and the running safety of the unit is ensured.
A soot blowing pipeline is independently led to separate the air preheater soot blower from the boiler body soot blower after the boiler body soot blowing steam source regulating door 3, so that steam supply during continuous soot blowing of the air preheater can be ensured, and the problems of unstable steam supply pressure from auxiliary steam to the air preheater and long-term pressure before the lifting of the boiler body soot blower can be solved.
Considering that all systems mutually blow-by after the pipeline is transformed, the pipeline leading-out point is led out from the boiler body soot blowing steam source after the regulation of the valve, and is additionally provided with an isolation door, and the junction is connected to the boiler body to the air preheater check valve and the auxiliary steam to the air preheater soot blowing check valve 9.
The invention solves two problems:
because the soot blowing pressure of auxiliary steam to the air preheater is less than 1MPa due to the load of the unit, the pressure requirement of the soot blowing steam source of the air preheater cannot be met.
When the soot blowing steam source of the air preheater adopts the soot blowing steam source of the boiler body, the potential safety hazard of the damage to the heating surface caused by the imprecise flushing of the heating surface by the lifting valve is eliminated, and the operation safety of the unit is ensured.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A boiler soot blowing steam source device of a supercritical unit is characterized by comprising:
a first pipeline from the boiler body to the hearth soot blower, wherein a soot blowing safety valve (4) is arranged on the first pipeline;
a second pipeline leading to the pin-removal soot blower is connected between the first pipeline soot blower safety valve (4) and the hearth soot blower, and a denitration check valve is arranged on the second pipeline;
a third pipeline leading to the air preheater is connected between the second pipeline denitration check valve and the pin removal soot blower;
a fourth pipeline leading to the air preheater is arranged between the connection point of the first pipeline and the second pipeline and the soot blowing safety valve (4).
2. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
and a newly-added active electric door (5) is arranged on the first pipeline between the connection point of the first pipeline and the second pipeline and the connection point of the first pipeline and the fourth pipeline.
3. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
and a newly-increased air preheater soot blowing steam source electric door (7) is arranged on the fourth pipeline between the connection point of the first pipeline and the fourth pipeline and the connection point of the fourth pipeline and the third pipeline.
4. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
and a new air preheater soot blowing steam source manual door (6) is further arranged on the fourth pipeline between the connection point of the first pipeline and the fourth pipeline and the connection point of the fourth pipeline and the third pipeline.
5. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
the apparatus further comprises: and a fifth pipeline from the auxiliary steam to the air preheater.
6. The soot blowing steam source device of the supercritical unit boiler according to claim 5, wherein,
the fifth pipeline is provided with a soot blowing isolation door (8) of the auxiliary steam-air preheater and a soot blowing check door (9) of the auxiliary steam-air preheater.
7. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
a soot blowing steam source adjusting door (3) is arranged between the boiler body and the soot blowing safety valve (4) on the first pipeline.
8. The soot blowing steam source device of the supercritical unit boiler according to claim 7, wherein,
a soot blowing steam source manual door (1) and a soot blowing steam source electric door (2) are arranged between the boiler body and the soot blowing steam source adjusting door (3) on the first pipeline.
9. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
one end of the second pipeline, which is close to the denitration soot blower, is provided with a denitration soot blowing isolation door (11).
10. The soot blowing steam source device of the supercritical unit boiler according to claim 1, wherein,
one end of the fourth pipeline, which is close to the air preheater, is provided with an air preheater soot blowing isolation door (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310737422.6A CN116857666A (en) | 2023-06-20 | 2023-06-20 | Soot blowing steam source device of supercritical unit boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310737422.6A CN116857666A (en) | 2023-06-20 | 2023-06-20 | Soot blowing steam source device of supercritical unit boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116857666A true CN116857666A (en) | 2023-10-10 |
Family
ID=88218230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310737422.6A Pending CN116857666A (en) | 2023-06-20 | 2023-06-20 | Soot blowing steam source device of supercritical unit boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116857666A (en) |
-
2023
- 2023-06-20 CN CN202310737422.6A patent/CN116857666A/en active Pending
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