CN114198500A - Method for sealing furnace throat manhole - Google Patents
Method for sealing furnace throat manhole Download PDFInfo
- Publication number
- CN114198500A CN114198500A CN202111438936.9A CN202111438936A CN114198500A CN 114198500 A CN114198500 A CN 114198500A CN 202111438936 A CN202111438936 A CN 202111438936A CN 114198500 A CN114198500 A CN 114198500A
- Authority
- CN
- China
- Prior art keywords
- sealing
- manhole
- throat
- port
- salt
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000010425 asbestos Substances 0.000 claims abstract description 45
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 45
- 150000003839 salts Chemical class 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000002791 soaking Methods 0.000 claims abstract description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 8
- 239000011780 sodium chloride Substances 0.000 claims abstract description 7
- 230000009191 jumping Effects 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 5
- 235000014121 butter Nutrition 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003034 coal gas Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
Abstract
The embodiment of the application discloses a method for sealing a furnace throat manhole, which relates to the field of blast furnace pressure medium sealing and comprises the following steps: 1) cleaning a manhole cover and a manhole groove, and soaking the asbestos rope in salt water; 2) putting the asbestos rope soaked with the saline water into the manhole groove from the second sealing opening, winding the asbestos rope around the manhole groove for a circle, exceeding the initial position by a certain distance D, and hammering the asbestos rope flat by a hand hammer; 3) covering the cover on the manhole groove, and fixing the sealing assembly on the five sealing ports; 4) sequentially knocking the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a sledge hammer according to a reverse triangle sequence, and then sequentially knocking the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to a regular triangle sequence; 5) and (5) repeating the step 4) for 2-3 times, and finishing sealing when the jumping sound is heard by the sledgehammer sealing assembly. The method can standardize the sealing operation and effectively solve the major equipment hidden trouble of gas leakage of the furnace throat manhole.
Description
Technical Field
The application relates to the field of blast furnace pressure medium sealing, in particular to a method for sealing a furnace throat manhole.
Background
The blast furnace hot air system, the crude gas system, the furnace top charging system and the like have a large number of manholes, partial manholes are required to be opened during each maintenance, most of the manholes are connected with the blast furnace body, so that the manholes are guaranteed to be sealed tightly by one-time back buckling when the manholes are buckled back, and once the manholes are not sealed tightly after blast of the blast furnace, the blast furnace is required to be stopped for air treatment, so that the secondary air stop fault of the blast furnace is caused. Almost all gas medium pipeline systems in the main body system of the iron-making blast furnace are single systems, equipment stops running, and manhole pressure relief and pressure reduction mean that the blast furnace stops production and reduces production. Because of the continuity of the production of the blast furnace, the short-time air cut-off and air reduction can cause great influence on the furnace condition, influence the continuous and stable operation of the blast furnace, directly influence the integral operation condition of the blast furnace and cause the reduction of the production of the blast furnace.
At present, the same industry in China has no system description aiming at the technology, particularly, salt water asbestos rope soaking and pin plate manhole do not have standards, teachers and masters with abundant experience are adopted to carry out the work in the same industry generally, and the phenomenon of manhole wind leakage often occurs due to the fact that the teachers and the masters have no standard operation standards and are influenced by high temperature and pressure.
In the actual production work, examine at every turn and repair all there is the phenomenon of manhole hourglass coal gas, not only bring the hidden danger to patrolling and examining personnel's safety, and there is the equipment hidden danger of enlargeing, the inside salt inflation of salt solution asbestos cord when meetting high temperature has played sealed effect, the salt solution that soaks the salt solution asbestos cord does not have unified standard, lead to soaking degree to differ, some can not reach sealed requirement even, it is random to detain 5 pin boards of manhole and strike the order simultaneously, there is not the standard, it is inhomogeneous to lead fine and close to seal the pressure mouth, in addition the salt solution asbestos cord also soaks originally, lead to the manhole to appear the wind phenomenon, how can solve this type of technological problem, it is indiscriminate not to delay to have just.
Content of application
The application aims to provide a method for sealing a furnace throat manhole, which aims to solve the technical problems existing in the prior art: the problem of air leakage caused by uneven sealing pressure port due to the fact that the furnace throat manhole is not standard when being sealed is solved.
In order to solve the technical problem, the following technical scheme is adopted in the application:
the first aspect of the embodiment of the application provides a method for sealing a furnace throat manhole, wherein the furnace throat manhole is provided with a manhole cover, a manhole groove, a manhole rotating shaft and five sealing ports, the manhole rotating shaft and the five sealing ports are uniformly and circumferentially arranged on the outer side of the furnace throat manhole, and each sealing port is provided with a sealing component; five the sealing ports are along the counter-clockwise direction of the manhole rotating shaft and are respectively: the first sealing port, the second sealing port, the third sealing port, the fourth sealing port and the fifth sealing port;
the method comprises the following steps:
1) cleaning a manhole cover and a manhole groove, and soaking the asbestos rope in salt water;
2) putting the asbestos rope soaked with the saline water into the manhole groove from the second sealing opening, winding the asbestos rope around the manhole groove for a circle, exceeding the initial position by a certain distance D, and hammering the asbestos rope flat by a hand hammer;
3) covering the cover on the manhole groove, and fixing the sealing assembly on the five sealing ports;
4) sequentially knocking the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a sledge hammer according to a reverse triangle sequence, and then sequentially knocking the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to a regular triangle sequence;
5) and (5) repeating the step 4) for 2-3 times, and finishing sealing when the jumping sound is heard by the sledgehammer sealing assembly.
In some embodiments, the method of soaking the asbestos cord in saline in step 1) comprises the following steps:
half of the water is added in a container, and then the salt is added in another container until the salt content in the water is saturated;
continuing to add salt into the water until a layer of salt precipitates at the bottom of the container;
and (3) putting the asbestos ropes into a container for soaking for more than 24 hours and less than 5 months.
In some embodiments, the seal assembly includes a pin plate for sealing the sealing port and a pin post for securing the pin plate.
In some embodiments, D in step 2) is from 40mm to 70 mm.
In some embodiments, in step 2), a layer of butter is applied to the asbestos cord after the asbestos cord is hammered flat by a hand hammer.
In some embodiments, if the pin plate rebounds when being knocked in the step 4), the pin plate is taken out, a welding rod is inserted into the mounting position of the pin plate, and then the pin plate is fixed.
In some embodiments, in step 2), the diameter of the asbestos cord is between 10mm and 15 mm.
In some embodiments, the method of determining whether the salt content in the container is saturated is: and adding salt into the container, and stirring until the salt is still undissolved during stirring, so that the salt content in the water can be judged to be saturated.
In some embodiments, the container is a bucket.
In some embodiments, the salt precipitate has a thickness of 3mm to 6 mm.
According to the technical scheme, the method has at least the following advantages and positive effects:
the application discloses method of sealed furnace throat manhole, place in through the asbestos rope that will steep salt solution in manhole groove, seal the furnace roar manhole at sealed furnace roar high temperature crystallization through the salt solution in the asbestos rope, formulated one kind simultaneously and beaten seal assembly and manhole pivot on second seal mouth and the fourth seal mouth in proper order according to the reverse triangle order, beat the method of beating seal assembly on third seal mouth, first seal mouth and the fifth seal mouth in proper order according to the positive triangle order afterwards, can standardize sealed operation, the effectual important equipment hidden danger that has solved the manhole and leak coal gas, the application of this technique is to guaranteeing that each process systems equipment of ironmaking operation portion continues steady operation, the blast furnace lasts the production of steadily producing and has important meaning. The method can also be applied to other manholes to treat similar problems, and has strong portability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a throat manhole according to an embodiment;
figure 2 is a schematic illustration of a tapping sequence for a throat manhole according to an embodiment.
The reference numerals are explained below: 1. a manhole shaft; 2. a first sealing port; 3. a second sealing port; 4. a third sealing port; 5. a fourth sealing port; 6. a fifth sealing port; 7. a pin plate; 8. a pin post; 9. an asbestos cord.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "communicate", "mount", "connect", and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Please refer to fig. 1.
Figure 1 is a schematic view of the structure of a throat manhole according to one embodiment of the method of sealing a throat according to the present application. As shown in the figure, a manhole cover, a manhole groove, a manhole rotating shaft 1 and five sealing ports are arranged on the furnace throat manhole, and the manhole rotating shaft 1 and the five sealing ports are uniformly and circumferentially arranged on the outer side of the furnace throat manhole;
each sealing opening is provided with a sealing component; the sealing assembly comprises a pin plate 7 and a pin column 8, the pin plate 7 is used for sealing the sealing opening, and the pin column 8 is used for fixing the pin plate 7.
Five the sealing ports are along the counter-clockwise direction of the manhole rotating shaft 1: a first sealing port 2, a second sealing port 3, a third sealing port 4, a fourth sealing port 5 and a fifth sealing port 6;
a method of sealing a furnace throat manhole comprising the steps of:
1) cleaning the manhole cover and the manhole groove, and soaking the asbestos rope 9 in salt water;
2) putting the asbestos rope 9 soaked with the saline water into the manhole groove from the second sealing port 3, winding the asbestos rope around the manhole groove for a circle, exceeding the initial position by 40-70 mm, ensuring that the manhole groove can be fully filled with the asbestos rope 9, and hammering the asbestos rope 9 flat by a hand hammer to ensure the sealing property;
3) covering the cover on the manhole groove, and fixing the pin plate 7 on the five sealing ports through the pin columns 8;
4) as shown in fig. 2, a sledge hammer is used for sequentially knocking the pin plates 7 on the second sealing port 3 and the fourth sealing port 5 and the manhole rotating shaft 1 according to the regular triangle sequence, and then sequentially knocking the pin plates 7 on the third sealing port 4, the first sealing port 2 and the fifth sealing port 6 according to the reverse triangle sequence; the triangular pin plate 7 with stability is used for knocking the pin plates of all the sealing ports, so that all the sealing ports are uniformly sealed.
5) And (5) repeating the step 4) for 2-3 times, and finishing sealing when the jumping sound is heard by the sledgehammer sealing assembly. When the sound of "jumping" is heard, the airtightness in the furnace is good.
In this embodiment, the method for soaking the asbestos cord 9 in saline water includes the following steps:
half of the water is added in a container, and then the salt is added in another container until the salt content in the water is saturated;
continuing to add salt into the water until a layer of salt precipitates at the bottom of the container;
and putting the asbestos cord 9 into a container for soaking for more than 24 hours and less than 5 months.
In this embodiment, in step 2), a layer of butter is also applied to the asbestos cord 9 after the asbestos cord 9 is hammered flat by a hand hammer. The tightness of the asbestos rope 9 is enhanced through the butter, and air leakage is avoided.
In this embodiment, the pin plate 7 rebounds when the pin plate 7 is knocked in step 4), at this time, the pin plate 7 is taken out, a welding rod is inserted into the mounting position of the pin plate 7, and the pin plate 7 is fixed well, so that the rebounding phenomenon can be effectively prevented.
In the present embodiment, in step 2), the diameter of the asbestos cord 9 is 10mm to 15mm, wherein the diameter of the asbestos cord 9 is preferably 13 mm.
In this embodiment, the method for determining whether the salt content in the container is saturated is as follows: and adding salt into the container, and stirring until the salt is still undissolved during stirring, so that the salt content in the water can be judged to be saturated. The saturated saline water can ensure the sealing performance of the asbestos cord 9.
In this embodiment, the container is a bucket.
In this example, the thickness of the salt precipitate is 3mm to 6 mm. Can effectively ensure that the asbestos rope 9 can fully absorb salt. According to the technical scheme, the method has at least the following advantages and positive effects:
the application discloses method of sealed furnace throat manhole, place in through the asbestos rope that will steep salt solution in manhole groove, seal the furnace roar manhole at sealed furnace roar high temperature crystallization through the salt solution in the asbestos rope, formulated one kind simultaneously and beaten seal assembly and manhole pivot on second seal mouth and the fourth seal mouth in proper order according to positive triangle order, beat the method of beating seal assembly on third seal mouth, first seal mouth and the fifth seal mouth in proper order according to positive triangle order afterwards, can standardize sealed operation, the effectual important equipment hidden danger that has solved the manhole and leak coal gas, the application of this technique is to guaranteeing that each process systems equipment of ironmaking operation portion lasts steady operation, the blast furnace lasts the production of stabilizing and has important meaning. The method can be applied to manholes of other factories to treat similar problems, and has strong portability.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or 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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The method for sealing the furnace throat manhole is characterized in that a manhole cover, a manhole groove, a manhole rotating shaft and five sealing ports are arranged on the furnace throat manhole, the manhole rotating shaft and the five sealing ports are uniformly and circumferentially arranged on the outer side of the furnace throat manhole, and a sealing assembly is arranged on each sealing port; five the sealing ports are along the counter-clockwise direction of the manhole rotating shaft and are respectively: the first sealing port, the second sealing port, the third sealing port, the fourth sealing port and the fifth sealing port;
the method comprises the following steps:
1) cleaning a manhole cover and a manhole groove, and soaking the asbestos rope in salt water;
2) putting the asbestos rope soaked with the saline water into the manhole groove from the second sealing opening, winding the asbestos rope around the manhole groove for a circle, exceeding the initial position by a certain distance D, and hammering the asbestos rope flat by a hand hammer;
3) covering the cover on the manhole groove, and fixing the sealing assembly on the five sealing ports;
4) sequentially knocking the sealing components on the second sealing port and the fourth sealing port and the manhole rotating shaft by using a sledge hammer according to a reverse triangle sequence, and then sequentially knocking the sealing components on the third sealing port, the first sealing port and the fifth sealing port according to a regular triangle sequence;
5) and (5) repeating the step 4) for 2-3 times, and finishing sealing when the jumping sound is heard by the sledgehammer sealing assembly.
2. A method of sealing a furnace throat manhole as claimed in claim 1, wherein the method of soaking asbestos cord in saline in step 1) comprises the steps of:
half of the water is added in a container, and then the salt is added in another container until the salt content in the water is saturated;
continuing to add salt into the water until a layer of salt precipitates at the bottom of the container;
and (3) putting the asbestos ropes into a container for soaking for more than 24 hours and less than 5 months.
3. A method of sealing a throat manhole according to claim 1, wherein the sealing assembly comprises a pin plate for sealing the sealing opening and a pin post for securing the pin plate.
4. A method of sealing a throat manhole according to claim 1, wherein D is 40mm to 70mm in step 2).
5. The method for sealing the furnace throat manhole according to claim 1, wherein a layer of butter is applied to the asbestos cord after the asbestos cord is hammered by a hammer in step 2).
6. A method of sealing a throat manhole of a furnace as claimed in claim 3, wherein the pin plate is removed if a bounce of the pin plate occurs when the pin plate is knocked in step 4), and a welding rod is inserted into the mounting portion of the pin plate, and the pin plate is fixed.
7. A method of sealing a furnace throat manhole as claimed in claim 1, wherein in step 2), the diameter of the asbestos cord is 10mm to 15 mm.
8. A method of sealing the throat manhole of a furnace according to claim 2, wherein the method of judging whether the salt content in the vessel is saturated is: and adding salt into the container, and stirring until the salt is still undissolved during stirring, so that the salt content in the water can be judged to be saturated.
9. A method of sealing a throat manhole according to claim 2 wherein the vessel is a bucket.
10. A method of sealing a throat manhole according to claim 2 wherein the salt deposit has a thickness of 3mm to 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438936.9A CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438936.9A CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114198500A true CN114198500A (en) | 2022-03-18 |
| CN114198500B CN114198500B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111438936.9A Active CN114198500B (en) | 2021-11-30 | 2021-11-30 | Method for sealing throat manhole |
Country Status (1)
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|---|---|
| CN (1) | CN114198500B (en) |
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2021
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| Publication number | Publication date |
|---|---|
| CN114198500B (en) | 2024-02-02 |
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