CN113375177A - Boiler and sealing method - Google Patents
Boiler and sealing method Download PDFInfo
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- CN113375177A CN113375177A CN202110592963.5A CN202110592963A CN113375177A CN 113375177 A CN113375177 A CN 113375177A CN 202110592963 A CN202110592963 A CN 202110592963A CN 113375177 A CN113375177 A CN 113375177A
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- soot blower
- wall
- boiler
- air
- positive pressure
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- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000004071 soot Substances 0.000 claims abstract description 171
- 238000007664 blowing Methods 0.000 claims abstract description 27
- 125000004122 cyclic group Chemical group 0.000 claims description 20
- 238000010030 laminating Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 13
- 239000003546 flue gas Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/001—Ash removal, handling and treatment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2700/00—Constructional details of combustion chambers
- F23M2700/008—Preventing outwards emission of flames or hot gases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a boiler and a sealing method, wherein the boiler comprises a boiler wall, a soot blower, a positive pressure wall box and an air supply assembly, the positive pressure wall box is arranged on the boiler wall, the soot blower comprises a soot blower gun body, the soot blower gun body penetrates through the positive pressure wall box and is inserted into the boiler wall, the air supply assembly is connected with the positive pressure wall box, and the air supply assembly is used for blowing air flow into the positive pressure wall box so that the air pressure in the positive pressure wall box is greater than the air pressure in the boiler wall, thereby preventing the smoke in the boiler wall from leaking out through a wall-penetrating gap; the air supply subassembly is connected with the soot blower, and the air supply subassembly is used for blowing into the air current in to the soot blower, and when the soot blower stopped blowing the ash operation, the air supply subassembly can make the internal atmospheric pressure of soot blower rifle be greater than the atmospheric pressure in the boiler furnace wall, prevents that the soot blower when stopping the operation, and inside the flue gas corroded the soot blower in revealing to the soot blower rifle body through the steam hole.
Description
Technical Field
The invention relates to the technical field of sealing equipment, in particular to a boiler and a sealing method.
Background
In the wet flue Gas desulfurization process of the coal-fired power plant in China, the traditional GGH (Gas-Heater) has the series problems of excessive SO2 emission, heat exchange plate corrosion, ash deposition and scaling, flue Gas blockage, large resistance, high operation and maintenance cost and the like, and in order to improve the flue Gas emission effect and improve the environmental protection performance, the traditional GGH is changed into MGGH (Mitsubishi Gas-Heater).
In order to ensure that the cooling end is not blocked by accumulated dust during the operation of the MGGH, a steam soot blower is generally installed for periodically blowing dust so as to maintain the pressure difference of the MGGH to be basically stable. In the steam soot blowing process, the whole stroke of a soot blower gun tube penetrates through the boiler furnace wall, and a certain wall penetrating gap exists between the gun tube and the boiler furnace wall for ensuring that the gun tube does not wear or block in and out.
During the operation of the MGGH system, the boiler furnace wall is always in a micro-positive pressure state, so that smoke is sprayed out from a barrel wall through gap, the environment is polluted, the supporting wheel and the bracket of the soot blower are corroded, the heat preservation and outer protection of the MGGH are corroded, the barrel of the soot blower is jammed, other faults are caused, and the equipment maintenance workload is increased;
meanwhile, the smoke at positive pressure enters a gun tube and a soot blower valve of the soot blower, corrodes the gun tube and the soot blower valve, causes internal leakage of the soot blower valve, influences the soot blowing effect, causes MGGH pressure difference to rise, and is not beneficial to safety, stability and economic operation of the unit.
Disclosure of Invention
The invention discloses a boiler and a sealing method, which are used for solving the technical problems that the leakage of flue gas of the boiler pollutes the environment, corrodes equipment and influences the stable and safe operation of a unit in the prior art.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a boiler which comprises a boiler wall, a soot blower, a positive pressure wall box and an air supply assembly, wherein the positive pressure wall box is arranged on the boiler wall, the soot blower comprises a soot blower gun body, and the soot blower gun body penetrates through the positive pressure wall box and is inserted into the boiler wall.
The air supply assembly is connected with the positive pressure wall box, and the air supply assembly is used for blowing air flow into the positive pressure wall box, so that the air pressure in the positive pressure wall box is greater than the air pressure in the boiler wall.
The air supply assembly is connected with the soot blower and used for blowing air flow into the soot blower, and when the soot blower stops soot blowing operation, the air supply assembly can enable air pressure in a gun body of the soot blower to be larger than air pressure in a boiler wall.
Specifically, the air supply assembly comprises a primary air main pipe, a first air supply assembly and a second air supply assembly, the primary air main pipe is connected with the positive pressure wall box through the first air supply assembly, and the primary air main pipe is connected with the soot blower through the second air supply assembly.
First air supply subassembly includes first branch pipe and first valve, the both ends of first branch pipe are connected respectively the female pipe of a tuber of anger with malleation wall case, first valve is located first branch pipe.
The second air supply assembly comprises a second branch pipe and a second valve, two ends of the second branch pipe are respectively connected with the primary air main pipe and the soot blower, and the second valve is arranged on the second branch pipe.
Furthermore, the second air supply assembly further comprises a one-way valve, the one-way valve is arranged on the soot blower, and the second branch pipe is connected with the soot blower through the one-way valve.
Furthermore, a soot blower valve is arranged in the soot blower and connected with the soot blower gun body to control steam to enter the soot blower gun body, and the one-way valve is positioned at the air inlet rear end of the soot blower valve.
Furthermore, a labyrinth seal is arranged between the positive pressure wall box and the soot blower gun body.
Furthermore, labyrinth seal includes a plurality of cyclic annular interior seal boards and a plurality of cyclic annular outer seal board, cyclic annular interior seal board with cyclic annular outer seal board cover is in turn established soot blower rifle body is last, the inner wall of cyclic annular interior seal board with soot blower rifle body's outer wall laminating, cyclic annular outer seal board with the inner wall laminating of malleation wall case.
The boiler further comprises a supporting installation seat and a soot blower support, wherein the supporting installation seat is arranged on the boiler wall, the positive pressure wall box is arranged on the supporting installation seat, the soot blower is arranged on the soot blower support, and the supporting installation seat is fixedly connected with the soot blower support through a cantilever.
The invention also provides a sealing method of the boiler, which comprises the following steps:
s101: opening the first valve;
s102: and air flow is blown into the positive pressure wall box through the primary air main pipe and the first branch pipe, so that the air pressure in the positive pressure wall box is greater than the air pressure in the boiler wall.
Further, the sealing method further comprises the following steps:
s201: closing the soot blower valve to stop the soot blower;
s202: opening the second valve;
s203: and blowing airflow into the soot blower gun body through the primary air main pipe and the second branch pipe to enable the air pressure in the soot blower gun body to be larger than the air pressure in the boiler wall.
The technical scheme adopted by the invention can achieve the following beneficial effects:
according to the boiler disclosed by the embodiment of the invention, the air supply assembly blows air flow into the positive pressure wall box, so that the air pressure in the positive pressure box is larger than the air pressure in the boiler wall of the boiler, and thus positive pressure sealing of the air pressure of the air flow in the positive pressure wall box on the air pressure of smoke in the boiler wall is formed, and the smoke in the boiler wall is prevented from leaking out through a wall-penetrating gap; when the soot blower stops soot blowing operation, the air supply assembly blows air flow into the soot blower gun body, so that air pressure in the soot blower gun body is larger than air pressure in a boiler wall, positive pressure sealing of the air pressure of the air flow in the soot blower gun body to smoke pressure in the boiler wall is formed, and smoke is prevented from leaking into the soot blower through a steam hole to corrode the inside of the soot blower when the soot blower stops working.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a boiler of an embodiment;
FIG. 2 is an internal schematic view of the positive pressure wall box of an embodiment;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a partially enlarged schematic view at B in fig. 2.
In the figure:
1-boiler furnace wall; 2-soot blower, 201-soot blower gun body, 202-soot blower valve; 3-positive pressure wall box; 4-primary air main pipe; 5-a first air supply assembly, 501-a first branch pipe, 502-a second branch pipe; 6-a second air supply assembly, 601-a second branch pipe, 602-a second valve, 603-a one-way valve; 7-annular inner seal plate; 8-annular outer seal plate; 9-supporting the mounting seat; 10-a sootblower bracket; 11-cantilever.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The boiler provided by the embodiment of the present application is described in detail below with reference to fig. 1 to 4 through specific embodiments and application scenarios thereof.
The present embodiment provides a boiler, a boiler furnace wall 1, a soot blower 2, a positive pressure wall box 3 and a wind supply assembly.
Referring to fig. 1, the positive pressure wall box 3 is arranged on a boiler wall 1, the soot blower 2 includes a soot blower gun body 201, a steam hole is formed in the front end of the soot blower gun body 201, a soot blower valve 202 is arranged in the soot blower 2, the soot blower valve 202 is connected with the soot blower gun body 201 to control steam to enter the soot blower gun body 201, a wall through hole is formed in the boiler wall 1, and when the soot blower 2 performs soot blowing operation, the front end of the soot blower gun body 201 penetrates through the positive pressure wall box 3 and is inserted into the wall through hole of the boiler wall 1.
A wall penetrating gap is formed between the front end of the soot blower gun body 201 and the wall penetrating hole, and the positive pressure wall box 3 is arranged on the soot blower gun body 201 and covers the wall penetrating gap to prevent the flue gas from leaking out of the positive pressure wall box 3.
The air supply component is connected with the positive pressure wall box 3 and is used for blowing air flow into the positive pressure wall box 3 so that the air pressure in the positive pressure wall box 3 is greater than the air pressure in the boiler furnace wall 1, and the positive pressure sealing of the air pressure in the positive pressure wall box 3 to the smoke air pressure in the boiler furnace wall 1 is formed.
The air supply assembly is connected with the soot blower 2 and used for blowing air flow into the soot blower 2, and when the soot blower 2 stops soot blowing operation, the air supply assembly enables the air pressure in the soot blower gun body 201 to be larger than the air pressure in the boiler furnace wall 1, so that positive pressure sealing of the air pressure of the air flow in the soot blower gun body 201 to the air pressure of flue gas in the boiler furnace wall is formed.
The air supply assembly comprises a primary air main pipe 4, a first air supply assembly 5 and a second air supply assembly 6, the primary air main pipe 4 is connected with the positive pressure wall box 3 through the first air supply assembly 5, the primary air main pipe 4 supplies air to the positive pressure wall box 3 through the first air supply assembly 5, the primary air main pipe 4 is connected with the soot blower 2 through the second air supply assembly 6, and the primary air main pipe 4 supplies air to the soot blower 2 through the second air supply assembly 6.
In an alternative embodiment, the first air supply assembly 5 includes a first branch pipe 501 and a first valve 502, one end of the first branch pipe 501 is communicated with the primary air header pipe 4, the other end of the first branch pipe 501 is communicated to the positive pressure wall box 3, the first valve 502 is disposed on the first branch pipe 501, and the first valve 502 is used for controlling on-off of the first branch pipe 501.
During the specific application, open first valve 502, the female pipe 4 of wind once communicates through first branch pipe 501 with malleation wall case 3, and the female pipe 4 of wind blows into the air current in to malleation wall case 3 once, makes the atmospheric pressure in the malleation wall case 3 be greater than the atmospheric pressure in the boiler furnace wall 1 and forms the malleation sealed to prevent that the flue gas in the boiler furnace wall 1 from leaking through the wall clearance, cause the corruption to the outside of soot blower 2 and soot blower support, protect the heat preservation of MGGH to protect outward simultaneously.
The second air supply assembly 6 is connected between the primary air main pipe 4 and the soot blower gun body 201, and when the soot blower gun body 201 is in a stop state, the second air supply assembly 6 can enable the air pressure in the soot blower gun body 201 to be larger than the air pressure in the boiler furnace wall 1.
The second air supply assembly 6 comprises a second branch pipe 601 and a second valve 602, wherein both ends of the second branch pipe 601 are respectively connected with the primary air main pipe 4 and the soot blower 2, and the second valve 602 is arranged on the second branch pipe 601.
When the soot blower 2 stops blowing soot, in order to prevent the flue gas in the boiler furnace wall 1 from entering the soot blower gun body 201 through the steam holes to corrode the inside of the soot blower, the primary air main pipe 4 blows air flow into the soot blower gun body 201 through the second branch pipe 601, so that the air pressure in the soot blower gun body 201 is greater than the air pressure in the boiler furnace wall 1 to form positive pressure sealing, and the flue gas is prevented from entering the inside of the soot blower 2 through the steam holes.
In this embodiment, the first valve 502 and the second valve 602 are both manual valves.
The second air supply assembly 6 further comprises a one-way valve 603, the one-way valve 603 is arranged on the soot blower 2, and the second branch pipe 601 is connected with the soot blower 2 through the one-way valve 603.
The first valve 502 and the second valve 602 are normally open, and when the soot blower 2 performs soot blowing operation, the soot blower valve 202 is opened, and the pressure of steam entering the soot blower 2 closes the check valve 603 to block the communication between the second branch pipe 601 and the soot blower 2, and the check valve 603 can prevent the steam from entering the second branch pipe 601.
When the soot blower 2 stops the soot blowing operation, the soot blower valve 202 is closed, the check valve 603 is in an open state, and the primary air main pipe 4 blows air flow into the soot blower gun body 201 through the second branch pipe 601.
In this embodiment, the check valve 603 can prevent steam in the sootblower 2 from entering the second branch pipe 601 during sootblowing operation of the sootblower 2. When the soot blower 2 needs to be overhauled, the first valve 502 is closed to isolate primary air from the second valve 602, so that the soot blower 2 is convenient to overhaul.
Further, the sootblower valve 202 is a poppet valve, and the check valve 603 is provided at the poppet valve.
When the soot blower gun body 201 enters the positive pressure wall box 3, the soot blower gun body 201 will shake, and in order to ensure the sealing performance and ensure that the soot blower gun body 201 can smoothly enter the positive pressure wall box 3, in an optional embodiment, a labyrinth seal is arranged between the positive pressure wall box 3 and the soot blower gun body 201.
Specifically, labyrinth seal includes a plurality of cyclic annular interior seal boards 7 and a plurality of cyclic annular outer seal board 8, cyclic annular interior seal board 7 and cyclic annular outer seal board 8 cover in turn establish on soot blower rifle body 201, the inner wall of cyclic annular interior seal board 7 and the laminating of the outer wall of soot blower rifle body 201, the laminating of the inner wall of cyclic annular outer seal board 8 and malleation wall case 3, form a series of clearances and inflation cavity of damming between cyclic annular interior seal board 7 and the cyclic annular outer seal board 8, make the flue gas produce the throttling effect when the clearance through tortuous labyrinth and reach the purpose of hindering the hourglass, prevent that the flue gas from revealing outside malleation wall case 3.
In an optional embodiment, the boiler further comprises a supporting mounting seat 9 and a soot blower bracket 10, wherein the supporting mounting seat 9 is arranged on the boiler wall 1 and plays a role of strengthening and fixing the positive pressure wall box 3, the positive pressure wall box 3 is arranged on the supporting mounting seat 9, the soot blower is arranged on the soot blower bracket 10, and the supporting mounting seat 9 is fixedly connected with the soot blower bracket 10 through a cantilever 12.
The boiler of this embodiment, when in particular use:
when the soot blower 2 blows soot or stops blowing, the first air supply assembly 5 can be in an opening state to realize positive pressure sealing of the positive pressure wall box 3 on smoke in the boiler wall 1: opening a first valve 502, blowing air flow into the positive pressure wall box 3 through a first branch pipe 501 by a primary air main pipe 4, and enabling the air pressure in the positive pressure wall box 3 to be larger than the air pressure in the boiler wall 1, so that the smoke in the boiler wall 1 is prevented from leaking out through a wall-through gap;
when the soot blower stops working, the second air supply assembly 6 is started to realize positive pressure sealing of the soot blower gun body 201 on smoke in the boiler furnace wall 1: the second valve 602 is opened, the primary air main pipe 4 can blow air flow into the soot blower gun body 201 through the second branch pipe 601, so that the air pressure in the soot blower gun body 201 is larger than the air pressure in the boiler wall, and when the soot blower 2 stops working, smoke is prevented from leaking into the soot blower gun body 201 through the steam hole of the soot blower 2, corroding the inner wall of the soot blower gun body 201 and the soot blower valve 202, causing leakage in the soot blower valve 202, and affecting the soot blowing effect.
The embodiment also provides a sealing method using the boiler, which comprises the following steps:
s101: opening the first valve 502;
s102: air flow is blown into the positive pressure wall box 3 through the first branch pipe 501 through the primary air main pipe 4, so that the air pressure in the positive pressure wall box 3 is greater than the air pressure in the boiler wall 1, and positive pressure sealing of the air pressure of the air flow in the positive pressure wall box 3 to the air pressure of smoke in the boiler wall 1 is formed.
Further, the sealing method may further include the steps of:
s201: closing a soot blower valve 202 to stop the soot blower 2 from working;
s202: opening the second valve 602;
s203: air flow is blown into the soot blower gun body 201 through the primary air main pipe 4 and the second branch pipe 601, so that the air pressure in the soot blower gun body 201 is larger than the air pressure in the boiler wall 1, and positive pressure sealing of the air pressure of the air flow in the soot blower gun body 201 to the flue gas pressure in the boiler wall 1 is formed.
In summary, the boiler and the sealing method of the present embodiment have the following technical effects:
firstly, positive pressure sealing of the positive pressure wall box 3 on smoke in the boiler wall 1 is realized, so that the soot blower gun body 201 can smoothly penetrate through the boiler wall 1 without abrasion or jamming, the smoke in the boiler wall 1 can be prevented from leaking from a through-wall gap, the outside of the soot blower gun body 201, the soot blower bracket 10 and the heat preservation outer protection of MGGH are corroded, the failure rate of the soot blower is reduced, and the maintenance workload of equipment is reduced;
secondly, when the soot blower 2 stops soot blowing operation, positive pressure sealing of the soot blower gun body 201 on smoke of the boiler furnace wall 1 is realized, the smoke in the boiler furnace wall 1 is prevented from entering the soot blower gun body 201 through a steam hole, the inner wall of the soot blower gun body 201 and the soot blower valve 202 are corroded, the soot blowing effect is prevented from being influenced by internal leakage of the soot blower valve 202, and the safe, stable and economic operation of a unit is facilitated.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A boiler is characterized by comprising a boiler wall (1), a soot blower (2), a positive pressure wall box (3) and an air supply assembly; wherein the content of the first and second substances,
the positive pressure wall box (3) is arranged on the boiler wall (1), the soot blower (2) comprises a soot blower gun body (201), and the soot blower gun body (201) penetrates through the positive pressure wall box (3) and is inserted into the boiler wall (1);
the air supply assembly is connected with the positive pressure wall box (3), and is used for blowing air flow into the positive pressure wall box (3) so that the air pressure in the positive pressure wall box (3) is greater than the air pressure in the boiler wall (1);
the air supply assembly is connected with the soot blower (2), and is used for blowing air flow into the soot blower (2), and when the soot blower (2) stops soot blowing operation, the air supply assembly can enable the air pressure in the soot blower gun body (201) to be larger than the air pressure in the boiler furnace wall (1).
2. The boiler according to claim 1, wherein the air supply assembly comprises a primary air main pipe (4), a first air supply assembly (5) and a second air supply assembly (6), the primary air main pipe (4) is connected with the positive pressure wall box (3) through the first air supply assembly, and the primary air main pipe (4) is connected with the soot blower (2) through the second air supply assembly.
3. The boiler according to claim 2, wherein the first air supply assembly (5) comprises a first branch pipe (501) and a first valve (502), the two ends of the first branch pipe (501) are respectively connected with the primary air header pipe (4) and the positive pressure wall box (3), and the first valve (502) is arranged on the first branch pipe (501).
4. The boiler according to claim 3, wherein the second air supply assembly (6) comprises a second branch pipe (601) and a second valve (602), the two ends of the second branch pipe (601) are respectively connected with the primary air header pipe (4) and the soot blower (2), and the second valve (602) is arranged on the second branch pipe (601).
5. The boiler according to claim 4, characterized in that the second air supply assembly (6) further comprises a one-way valve (603), the one-way valve (603) being provided to the sootblower (2), the second branch pipe (601) being connected to the sootblower (2) via the one-way valve (603).
6. The boiler according to claim 5, wherein the sootblower (2) has a sootblower valve (202) therein, the sootblower valve (202) is connected to the sootblower gun body (201) to control steam to enter the sootblower gun body (201), and the check valve (603) is located at an air intake rear end of the sootblower valve (202).
7. The boiler according to any of the claims 1 to 6, characterized in that a labyrinth seal is arranged between the positive pressure wall box (3) and the soot blower gun body (201);
labyrinth seal includes a plurality of cyclic annular interior seal boards (7) and a plurality of cyclic annular outer seal board (8), cyclic annular interior seal board (7) with cyclic annular outer seal board (8) cover is established in turn on the soot blower rifle body (201), the inner wall of cyclic annular interior seal board (7) with the laminating of the outer wall of the soot blower rifle body (201), cyclic annular outer seal board (8) with the laminating of the inner wall of malleation wall case (3).
8. The boiler according to claim 7, further comprising a support mounting seat (9) and a soot blower bracket (10), wherein the support mounting seat (9) is arranged on the boiler furnace wall (1), the positive pressure wall box (3) is arranged on the support mounting seat (9), the soot blower (2) is arranged on the soot blower bracket (10), and the support mounting seat (9) is fixedly connected with the soot blower bracket (10) through a cantilever (11).
9. A method of sealing a boiler according to claim 6, comprising the steps of:
s101: opening the first valve (502);
s102: air flow is blown into the positive pressure wall box (3) through the primary air main pipe (4) through the first branch pipe (501), so that the air pressure in the positive pressure wall box (3) is greater than the air pressure in the boiler wall (1).
10. The method for sealing a boiler according to claim 9, further comprising the steps of:
s201: closing the soot blower valve (202) to stop the soot blower (2);
s202: opening the second valve (602);
s203: and blowing airflow into the soot blower gun body (201) through the primary air main pipe (4) through the second branch pipe (601), so that the air pressure in the soot blower gun body (201) is greater than the air pressure in the boiler wall (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592963.5A CN113375177A (en) | 2021-05-28 | 2021-05-28 | Boiler and sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592963.5A CN113375177A (en) | 2021-05-28 | 2021-05-28 | Boiler and sealing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113375177A true CN113375177A (en) | 2021-09-10 |
Family
ID=77574851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110592963.5A Pending CN113375177A (en) | 2021-05-28 | 2021-05-28 | Boiler and sealing method |
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| CN (1) | CN113375177A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247403A (en) * | 1995-03-15 | 1996-09-27 | Mitsubishi Heavy Ind Ltd | Heat soak method of soot blower |
| CN201141611Y (en) * | 2007-09-11 | 2008-10-29 | 中国船舶重工集团公司第七一一研究所 | Positive sealing and fixing type steam ash blower |
| CN205102138U (en) * | 2015-10-15 | 2016-03-23 | 武汉三宇机械有限公司 | A two malleation wall casees for soot blower |
| CN106015582A (en) * | 2016-07-01 | 2016-10-12 | 大唐呼图壁能源开发有限公司热电厂 | Positive pressure sealing device for soot blower |
| CN106940021A (en) * | 2017-05-08 | 2017-07-11 | 江苏方天电力技术有限公司 | A kind of sootblower arrangement |
| CN206817482U (en) * | 2017-06-15 | 2017-12-29 | 华电江苏能源有限公司句容发电厂 | A kind of steam sootblower positive seal device |
| CN207777825U (en) * | 2017-12-27 | 2018-08-28 | 中国神华能源股份有限公司 | The sealing structure and sealing system of blowing pipe |
-
2021
- 2021-05-28 CN CN202110592963.5A patent/CN113375177A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247403A (en) * | 1995-03-15 | 1996-09-27 | Mitsubishi Heavy Ind Ltd | Heat soak method of soot blower |
| CN201141611Y (en) * | 2007-09-11 | 2008-10-29 | 中国船舶重工集团公司第七一一研究所 | Positive sealing and fixing type steam ash blower |
| CN205102138U (en) * | 2015-10-15 | 2016-03-23 | 武汉三宇机械有限公司 | A two malleation wall casees for soot blower |
| CN106015582A (en) * | 2016-07-01 | 2016-10-12 | 大唐呼图壁能源开发有限公司热电厂 | Positive pressure sealing device for soot blower |
| CN106940021A (en) * | 2017-05-08 | 2017-07-11 | 江苏方天电力技术有限公司 | A kind of sootblower arrangement |
| CN206817482U (en) * | 2017-06-15 | 2017-12-29 | 华电江苏能源有限公司句容发电厂 | A kind of steam sootblower positive seal device |
| CN207777825U (en) * | 2017-12-27 | 2018-08-28 | 中国神华能源股份有限公司 | The sealing structure and sealing system of blowing pipe |
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