CN114669070A - Method for replacing shell gasket of vertical scraper evaporator - Google Patents
Method for replacing shell gasket of vertical scraper evaporator Download PDFInfo
- Publication number
- CN114669070A CN114669070A CN202210362841.1A CN202210362841A CN114669070A CN 114669070 A CN114669070 A CN 114669070A CN 202210362841 A CN202210362841 A CN 202210362841A CN 114669070 A CN114669070 A CN 114669070A
- Authority
- CN
- China
- Prior art keywords
- flange
- shell
- gasket
- evaporator
- vertical scraper
- 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
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000736911 Turritella communis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a method for replacing a shell gasket of a vertical scraper evaporator, which comprises the following steps: (1) disassembling the conical shell; (2) the gasket to be replaced is positioned between the first shell and the second shell, the first shell is positioned below the second shell, the top of the first shell is provided with a first flange, the bottom of the second shell is provided with a second flange, a connecting bolt between the first flange and the second flange is adjusted to drop the first shell, and the gasket to be replaced is taken out; (3) when the distance between the first flange and the second flange is 10-15cm, placing the replacement gasket between the first flange and the second flange; (4) lifting the first shell to enable the first flange to be matched with the second flange, and fastening the connecting bolt; (5) the distance between the first flange and the second flange is measured at multiple angles. The invention can realize the quick and convenient replacement of the shell gasket, saves the manpower, material resources and financial resources, and greatly improves the replacement and maintenance efficiency.
Description
Technical Field
The invention relates to the technical field of installation and maintenance of chemical equipment, in particular to a method for replacing a shell gasket of a vertical scraper evaporator.
Background
At present, tower equipment installation engineering in a plurality of chemical plant devices is an important part in electromechanical installation engineering, the tower equipment is generally positioned in the devices, pipelines are surrounded on the periphery of the tower equipment, the tower top is high in height, and a large crane is generally adopted to replace the tower equipment on the open ground after a gasket of a tower shell is damaged in the using process, so that the cost is high, and the efficiency is low.
A vertical scraper blade evaporimeter for preparing four hydrogen benzaldehyde, in the use, the flat pad of casing graphite appears and damages, leads to the material to leak, consequently needs to change the casing gasket. Because the equipment is arranged on the five layers of the frame, the replacement of the gasket is implemented according to the existing maintenance regulation, and the steam inlet and outlet pipelines and the lower outlet pipeline of the shell of the evaporator are required to be disconnected in sequence; splitting a motor, a reduction gearbox and the like, and using a crane to disassemble the motor, the reduction gearbox and the like to the open ground; a chain block is used for disassembling the conical seal head at the lowest end and moving the conical seal head to the open ground; disassembling a lower bearing and a shaft seal, and disassembling a lower rotor to move to the open ground; removing upper bearings, shaft seals and the like, and lifting out and moving to the open space for storage; the top large cover is disassembled, the large cover and the rotor are sequentially hung out, and special tools are used for storing the rotor on the open ground; disassembling foundation bolts of the evaporator, lifting out the shell, and moving to the open ground; disassembling the connecting bolts of the segmented shell; replacing the new gasket, then reinstalling all components, detecting the leakage to be qualified, completing the maintenance and the like.
According to the conventional maintenance and replacement steps, a plurality of groups of maintenance personnel of the movable and static equipment are required to be matched, the process has a plurality of cross operations, and after the bottom bearing shaft is disassembled, the one-way combined oil seal is required to be replaced. The workload is large, the number of resources to be overhauled is large, the period is long, the output of the device is influenced, and manpower, material resources and financial resources are greatly wasted.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a shell gasket replacing method of a vertical scraper evaporator, which can realize the quick replacement of a shell gasket without sequentially disassembling the whole equipment and has high efficiency and low cost.
In order to solve the technical problem, an embodiment of the present invention discloses a method for replacing a gasket of a vertical scraper evaporator casing, wherein the vertical scraper evaporator comprises a plurality of sections of casings along a vertical direction, the casings are connected through a flange, the gasket is arranged between two adjacent sections of casings, and a conical casing is arranged at the lower end of the vertical scraper evaporator, and the method comprises the following steps:
(1) disassembling the conical shell;
(2) the gasket to be replaced is positioned between the first shell and the second shell, the first shell is positioned below the second shell, the top of the first shell is provided with a first flange, the bottom of the second shell is provided with a second flange, the first shell is dropped by adjusting a connecting bolt between the first flange and the second flange, and the gasket to be replaced is taken out;
(3) when the distance between a first flange of a first shell and a second flange of a second shell is 10-15cm, placing a replacement gasket between the first flange and the second flange;
(4) lifting the first shell to enable the first flange to be matched with the second flange, and fastening a connecting bolt between the first flange and the second flange;
(5) the distance between the first flange and the second flange is measured at multiple angles.
Further, the replacement gasket is an omega interface segmented gasket.
Furthermore, the omega-shaped interface segmented gasket is formed by splicing four sections of arc-shaped gaskets end to end, and one end of each arc-shaped gasket is provided with an omega-shaped splicing interface.
Furthermore, the first flange and the second flange are respectively provided with a group of through holes in the directions of 0 degree, 90 degrees, 180 degrees and 270 degrees.
Furthermore, the group of through holes comprises four through holes, and the through holes are arranged on the same circumferential surface of the first flange and the second flange at equal intervals.
Furthermore, the first flange and the second flange are concave-convex flanges.
Further, the replacement shim is placed in the concave surface.
Further, the replacement gasket is fixed in the concave surface by gluing.
Further, in the step (5), the flatness of the inner wall of the cylinder of the vertical scraper evaporator is that the distance between the first flange and the second flange is qualified.
Further, the method also comprises the following steps after the step (5): and (5) performing a pressing test on the vertical scraper evaporator.
Compared with the prior art, the method for replacing the shell gasket of the vertical scraper evaporator has the following technical effects:
the shell of the vertical scraper evaporator is sequentially disassembled from top to bottom without using a large crane and other complex tools, and the shell gasket can be quickly and conveniently replaced without occupying extra open areas, so that manpower, material resources and financial resources are saved, and the replacement and maintenance efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view showing the structure of a vertical type blade evaporator according to an embodiment of the present invention;
fig. 2 shows a partially enlarged view of a portion B in fig. 1;
FIG. 3 shows a cross-sectional view along A-A in FIG. 1;
fig. 4 shows a schematic structural diagram of an Ω -interface segment gasket according to an embodiment of the present invention.
Reference numerals:
1-vertical scraper evaporator, 2-conical shell, 3-first shell, 4-second shell, 5-third shell, 6-fourth shell, 7-first flange, 8-second flange, 9-connecting bolt, 10-omega interface segmented gasket, 11-arc gasket, 12-omega type splicing interface, 21-first through hole, 22-second through hole, 23-third through hole, 24-fourth through hole, 31-fifth through hole, 32-sixth through hole, 33-seventh through hole, 34-eighth through hole, 41-ninth through hole, 42-tenth through hole, 43-eleventh through hole, 44-twelfth through hole, 51-thirteenth through hole, 52-fourteenth through hole, 53-fifteenth through hole and 54-sixteenth through hole.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable 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 meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the vertical scraper evaporator 1 of the present invention comprises a conical shell 2, a first shell 3, a second shell 4, a third shell 5, and a fourth shell 6 which are sequentially connected from bottom to top through flanges along a vertical direction (shown as x direction in fig. 1), wherein the flanges of each shell are connected by 48 bolts, a sealing gasket is arranged between two adjacent shells, and the specification of the sealing gasket is 1464 × 1434 × 2 HTC-9850; the vertical scraper evaporator 1 is arranged on the 5 layers of the device and is 28 meters high; the total length of the equipment is 14 meters, and the length of the shell is about 9.5 meters; the total weight of the components such as the speed reducer, the upper bearing and the rotor is 12t, the total weight of the rotor of the lower conical shell 2 part is about 5t, and the total weight of the shell is about 20 t.
When the sealing gasket appears damaging, the material appears in each casing link section department and reveals, needs in time change sealing gasket.
The invention provides a method for replacing a shell gasket of a vertical scraper evaporator, which specifically comprises the following steps:
(1) disassembling the conical shell 2 at the bottom and the bottom bearing, and moving the disassembled conical shell 2 and the disassembled bottom bearing to the empty place;
(2) as shown in fig. 2, the gasket to be replaced is located between the first housing 3 and the second housing 4 (also may be the gasket between the second housing 4 and the third housing 5 or the gasket between the third housing 5 and the fourth housing 6 needs to be replaced, which is only defined for convenience of description and is not used to define the specific position of the gasket), the top of the first housing 3 is fixed with a first flange 7, the bottom of the second housing 4 is fixed with a second flange 8, in a normal use state, the first flange 7 and the second flange 8 are tightened by 16 connecting bolts 9 (only 2 are shown in the figure, and the rest are not shown) to be fixedly connected, and the height of the first housing 3 is reduced by adjusting the connecting bolts 9;
taking the first flange 7 as an example, the first flange 7 of the present invention is provided with a set of through holes in the directions of 0 degrees, 90 degrees, 180 degrees, and 270 degrees in the same circumferential direction, as shown in fig. 3, the first through hole 21, the second through hole 22, the third through hole 23, and the fourth through hole 24 are a first set of through holes in the direction of 0 degrees, the fifth through hole 31, the sixth through hole 32, the seventh through hole 33, and the eighth through hole 34 are a second set of through holes in the direction of 90 degrees, the ninth through hole 41, the tenth through hole 42, the eleventh through hole 43, and the twelfth through hole 44 are a third set of through holes in the direction of 180 degrees, the thirteenth through hole 51, the fourteenth through hole 52, the fifteenth through hole 53, and the sixteenth through hole 54 are a fourth set of through holes in the direction, and a total of 16 connecting bolts in four directions are used to fix the first flange 7 and the second flange 8 above, and to realize the adjustment of the distance between the first flange 7 and the second flange 8. Four groups of workers loosen the nuts synchronously in sequence according to the same sequence so as to achieve the purpose that the first shell 3 slowly falls down, and take out the gasket which is arranged between the first flange 7 and the second flange 8 and needs to be replaced.
(3) The first shell slowly falls down, and when the distance between the first flange 7 and the second flange 8 reaches 10-15cm, the replacement gasket is placed on the upper surface of the first flange 7; as shown in fig. 4, the replaced gasket is an omega-interface segmented gasket 10, the omega-interface segmented gasket 10 is formed by splicing four arc gaskets 11 end to end, and one end of each arc gasket 11 is provided with an omega-shaped splicing opening 12; sequentially placing the arc gaskets 11 of the omega-interface segmented gasket 10 on the upper surface of the first flange 7, splicing to form the omega-interface segmented gasket 10, and gluing and fixing;
(4) lifting the first shell 3, uniformly tightening the connecting bolts 9 after the rabbets of the first flange 7 and the second flange 8 are aligned, then measuring the distance between the first flange 7 and the second flange 8 in multiple directions, and when the inner wall of a cylinder formed by the first shell 3 and the second shell 4 is straight, indicating that the distance between the first flange 7 and the second flange 8 is qualified;
(5) and (5) performing a pressing test, wherein the rotor runs qualified, and has no abnormal Katherin sound with the shell.
Optionally, the first flange 7 and the second flange 8 are concave-convex flanges, the first flange 7 is a concave flange, the second flange 8 is a convex flange, and the replacement gasket is placed in the concave surface of the first flange 7.
According to the method for replacing the shell gasket of the vertical scraper evaporator 1, a plurality of groups of maintenance personnel of dynamic and static equipment do not need to be used for cooperation, the workload is greatly reduced, the period is short, and the yield of the device is not greatly influenced; only the conical shell part at the lower part is disassembled, and the bottom bearing, the shaft seal, the top motor, the speed reducer and other parts of the vertical scraper evaporator do not need to be disassembled, so that the steps are simplified, the shutdown time is shortened, the overhaul cost is saved, and the shutdown overhaul time of the equipment is shortened.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a vertical scraper blade evaporator's casing gasket replacement method, vertical scraper blade evaporator includes along the multistage casing of vertical direction, passes through flange joint between each casing, is provided with the gasket between two sections adjacent casings, the lower extreme of vertical scraper blade evaporator is provided with the toper casing, its characterized in that includes following step:
(1) disassembling the conical shell;
(2) the gasket to be replaced is positioned between the first shell and the second shell, the first shell is positioned below the second shell, the top of the first shell is provided with a first flange, the bottom of the second shell is provided with a second flange, the first shell is dropped by adjusting a connecting bolt between the first flange and the second flange, and the gasket to be replaced is taken out;
(3) when the distance between a first flange of a first shell and a second flange of a second shell is 10-15cm, placing a replacement gasket between the first flange and the second flange;
(4) lifting the first shell to enable the first flange to be matched with the second flange, and fastening a connecting bolt between the first flange and the second flange;
(5) the distance between the first flange and the second flange is measured at multiple angles.
2. The method for replacing a gasket of a shell of a vertical scraper evaporator as claimed in claim 1, wherein the replacement gasket is an Ω -interface segmented gasket.
3. The method for replacing the casing gasket of the vertical scraper evaporator as claimed in claim 2, wherein the omega-shaped joint segmented gasket is formed by splicing four sections of arc-shaped gaskets end to end, and one end of each arc-shaped gasket is provided with an omega-shaped splicing port.
4. The method for replacing the gasket of the vertical scraper evaporator shell as claimed in claim 1, wherein the first flange and the second flange are respectively provided with a set of through holes in the directions of 0 degree, 90 degrees, 180 degrees and 270 degrees.
5. The method for replacing the gasket of the shell of the vertical scraper evaporator as claimed in claim 4, wherein the set of through holes comprises four through holes, and the through holes are arranged on the same circumferential surface of the first flange and the second flange at equal intervals.
6. The method for replacing a gasket of a shell of a vertical scraper evaporator as claimed in claim 1, wherein the first flange and the second flange are concave-convex flanges.
7. The vertical blade evaporator shell gasket replacement method of claim 6, wherein the replacement gasket is placed in a concave surface.
8. The method for replacing a gasket of a casing of a vertical blade evaporator according to claim 7, wherein the replacement gasket is fixed in the concave surface by gluing.
9. The method for replacing the gasket of the vertical scraper evaporator shell as claimed in claim 1, wherein in the step (5), the flatness of the inner wall of the vertical scraper evaporator barrel is that the distance between the first flange and the second flange is qualified.
10. The method for replacing the gasket of the shell of the vertical scraper evaporator as claimed in claim 1, wherein the step (5) is followed by the steps of: and (5) performing a pressing test on the vertical scraper evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210362841.1A CN114669070B (en) | 2022-04-07 | 2022-04-07 | Shell gasket replacement method of vertical scraper evaporator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210362841.1A CN114669070B (en) | 2022-04-07 | 2022-04-07 | Shell gasket replacement method of vertical scraper evaporator |
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| CN114669070A true CN114669070A (en) | 2022-06-28 |
| CN114669070B CN114669070B (en) | 2024-07-23 |
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| CN202210362841.1A Active CN114669070B (en) | 2022-04-07 | 2022-04-07 | Shell gasket replacement method of vertical scraper evaporator |
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|---|---|
| CN114669070B (en) | 2024-07-23 |
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