CN201245578Y - Formaldehyde reactor with floating tube sheet structure - Google Patents
Formaldehyde reactor with floating tube sheet structure Download PDFInfo
- Publication number
- CN201245578Y CN201245578Y CNU200820301675XU CN200820301675U CN201245578Y CN 201245578 Y CN201245578 Y CN 201245578Y CN U200820301675X U CNU200820301675X U CN U200820301675XU CN 200820301675 U CN200820301675 U CN 200820301675U CN 201245578 Y CN201245578 Y CN 201245578Y
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- CN
- China
- Prior art keywords
- cylindrical shell
- heat exchanging
- cylinder body
- exchanging segment
- conversion zone
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- Expired - Fee Related
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- Physical Or Chemical Processes And Apparatus (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a formaldehyde reaction vessel with a floating tube plate structure, which comprises a reaction zone cylinder body and a heat exchange zone cylinder body. A heat exchange pipe is arranged inside the heat exchange zone cylinder body; and the lower end of the heat exchange pipe is fixed and the upper end thereof is connected with a tube plate. The formaldehyde reaction vessel is characterized in that an expansion joint is arranged on the heat exchange zone cylinder body; the expansion joint is a radically molded convex ring or a concave ring; the expansion joint can also be arranged on the reaction zone cylinder body, and at the same time the reaction zone cylinder body and the heat exchange zone cylinder body are separated, the reaction zone cylinder body is arranged inside the upper port of the heat exchange zone cylinder body, and the upper port of the heat exchange zone cylinder body is connected with the reaction zone cylinder body; the tube plate is arranged at the bottom part of the reaction zone cylinder body; and the heat exchange pipe is arranged between the tube plate and the bottom part of the lower cylinder body. The expansion joint is arranged between the reaction zone cylinder body and the heat exchange zone cylinder body, so that the thermal stress generated when the heat exchange pipe is heated and expanded can be effectively removed, thereby reducing the damage of the thermal stress to the tube plate, greatly prolonging the service life of the tube plate, and at the same time prolonging the service life of the entire device.
Description
(1) technical field:
The utility model relates to a kind of formaldehyde reaction device, is specially the formaldehyde reaction device with floating tubesheet structure.
(2) background technology:
In traditional internal structure of formaldehyde reaction device, the outer cylinder body of its heat exchanging segment is the chuck of same diameter, the heat transfer tube that is provided with in the chuck is different with the structure and material of chuck, its coefficient of expansion is also inconsistent, be easy to cause fixedly that the tube sheet of heat transfer tube damages because of thermal stresses, cause the defective of work-ing life short (1～2 year).This is because of about 5 centimetres～25 centimetres sections on the top of reactor tube sheet, the zone of a temperature of reaction about 650 degree arranged, its temperature of reaction is to carry out heat exchange by the heat exchanger tube below the tube sheet, in heat transfer process, the elongation of heat transfer tube expanded by heating, and cause tube sheet to be subjected to its thermal stresses, because of causing the tube sheet drawing crack, thermal stresses damages.
(3) utility model content:
At the weak point of above-mentioned formaldehyde reaction device traditional structure, the utility model proposes a kind of effective solution tube sheet thermal stress issues, prolong the formaldehyde reaction device with floating tubesheet structure of the formaldehyde reaction device heat exchanging segment in its work-ing life.
Can realize the floating tubesheet structure of the formaldehyde reaction device heat exchanging segment of above-mentioned purpose, comprise cylindrical shell, cylindrical shell is divided into the conversion zone cylindrical shell and the heat exchanging segment cylindrical shell of upper-lower position, be provided with heat transfer tube in the heat exchanging segment cylindrical shell, the lower end of heat transfer tube is fixed, and its upper end is connected with tube sheet, and tube sheet is connected with cylindrical shell, different is that floating structure is set on cylindrical shell, can make tube sheet follow heat transfer tube thermal elongation and cold contraction.
Described floating structure can adopt the mode that expansion joint is set on the heat exchanging segment cylindrical shell, expansion joint is at the bulge loop of radially moulding or scrobicular ring, bulge loop or scrobicular ring place at expansion joint, the heat exchanging segment cylindrical shell has certain elastic telescopic amount, be enough to offset the heat exchanging segment cylindrical shell deformation that the dilatation owing to heat transfer tube causes, tube sheet is followed heat exchanging segment cylindrical shell dilatation, so the structure of floating, the stroke that has adapted to heat transfer tube is eliminated the thermal stresses of tube sheet better; Conversion zone cylindrical shell and the heat exchanging segment cylindrical shell of this moment can be an one-piece construction.
Described floating structure also can adopt the mode that expansion joint is set on the conversion zone cylindrical shell, the conversion zone cylindrical shell of this moment can separate with the heat exchanging segment cylindrical shell, and heat exchanging segment cylindrical shell back cut diameter is greater than the conversion zone barrel diameter, the lower end of conversion zone cylindrical shell be built in the heat exchanging segment cylindrical shell suitable for reading in, the heat exchanging segment cylindrical shell is suitable for reading to be connected with the conversion zone cylindrical shell above expansion joint by the ring-type web plate, tube sheet is located at conversion zone cylindrical shell bottom, heat transfer tube is arranged between tube sheet and the heat exchanging segment cylindrical shell bottom, and described expansion joint is at the bulge loop of radially moulding or scrobicular ring.
Expansion joint on the described conversion zone cylindrical shell can be processed into convex hoop shape, and for avoiding bulge loop and the heat exchanging segment cylindrical shell is suitable for reading collides, the diameter of bulge loop should be compared with scrobicular ring less than heat exchanging segment cylindrical shell back cut diameter, and bulge loop does not account for conversion zone inner barrel space.
For reducing the stroke of conversion zone cylindrical shell or heat exchanging segment cylindrical shell, can on conversion zone cylindrical shell and heat exchanging segment cylindrical shell, expansion joint be set simultaneously, when heat transfer tube was flexible, conversion zone cylindrical shell and heat exchanging segment cylindrical shell trace simultaneously were flexible.
Expansion joint on the heat exchanging segment cylindrical shell also can be processed into bulge loop.
For keeping the reasonable distance of expansion joint on conversion zone cylindrical shell and the heat exchanging segment cylindrical shell, the expansion joint on the heat exchanging segment cylindrical shell can be arranged on the tube sheet below.
Tube sheet in the utility model adopts flat butterfly end socket, can better improve the compression chord intensity of tube sheet.
Advantage of the present utility model is:
On the conversion zone cylindrical shell or on the heat exchanging segment cylindrical shell or on conversion zone cylindrical shell and heat exchanging segment cylindrical shell, expansion joint is set simultaneously, thermal stresses in the time of eliminating because of the heat transfer tube expanded by heating well, thereby reduce the destruction of thermal stresses to tube sheet, prolong the tube sheet life-span significantly (more than 5 years), also prolonged the life-span of entire equipment simultaneously.
(4) description of drawings:
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
The figure labelled notation:
1, reaction chamber; 2, Heat Room; 3, tube sheet; 4, heat transfer tube; 5, reacting gas inlet; 6, venting port; 7, water of condensation import; 8, condensation-water drain; 9, gas uniform device; 10, conversion zone cylindrical shell; 11, heat exchanging segment cylindrical shell; 12, expansion joint; 13, ring-type web plate; 14, product outlet; 15, the upper end circulation mouth of a river; 16, the lower end circulation mouth of a river; 17, circulation tube; 18, dividing plate.
(5) embodiment:
In embodiment shown in Figure 1, the heat exchange segment that the utlity model has the formaldehyde reaction device of floating tubesheet structure comprises conversion zone cylindrical shell 10 and heat exchanging segment cylindrical shell 11, suitable for reading section diameter of heat exchanging segment cylindrical shell 11 is greater than conversion zone cylindrical shell 10 diameters, the lower section diameter of heat exchanging segment cylindrical shell 11 equals conversion zone cylindrical shell 10 diameters, suitable for reading period oblique connection of the hypomere with heat exchanging segment cylindrical shell 11 of heat exchanging segment cylindrical shell 11, conversion zone cylindrical shell 10 coaxial suitable for reading sections of placing heat exchanging segment cylindrical shell 11, the end suitable for reading of heat exchanging segment cylindrical shell 11 is connected with conversion zone cylindrical shell 10 by ring-type web plate 13.
As shown in Figure 1, tube sheet 3 is connected conversion zone cylindrical shell 10 bottoms, and many heat transfer tubes 4 arrange evenly that axially its lower end is fixedly connected on heat exchanging segment cylindrical shell 11 bottoms, fixedlys connected with tube sheet 3 in its upper end, and tube sheet 3 adopts flat butterfly end socket.
As shown in Figure 1, each roll forming radial convex loop shape expansion joint 12 on conversion zone cylindrical shell 10 and the heat exchanging segment cylindrical shell 11, conversion zone cylindrical shell 10 expansion joints 12 are located on the conversion zone cylindrical shell 10 in the heat exchanging segment cylindrical shell 11, its diameter and less than heat exchanging segment cylindrical shell 11 back cut diameters, heat exchanging segment cylindrical shell 11 expansion joints 12 are located at heat exchanging segment cylindrical shell 11 hypomeres of tube sheet 3 belows.
Claims (9)
- [claim 1] has the formaldehyde reaction device of floating tubesheet structure, comprise cylindrical shell, cylindrical shell is divided into the conversion zone cylindrical shell (10) and the heat exchanging segment cylindrical shell (11) of upper-lower position, be provided with heat transfer tube (4) in the heat exchanging segment cylindrical shell (11), heat transfer tube (4) lower end is fixed, its upper end is connected with tube sheet (3), and tube sheet (3) is connected with cylindrical shell, it is characterized in that: setting makes tube sheet (3) follow the flexible floating structure of heat transfer tube (4) on the cylindrical shell.
- [claim 2] formaldehyde reaction device with floating tubesheet structure according to claim 1, it is characterized in that: described floating structure is to be provided with expansion joint (12) on the heat exchanging segment cylindrical shell (11) or to be provided with expansion joint (12) on conversion zone cylindrical shell (10), or upward and on the conversion zone cylindrical shell (10) is provided with expansion joint (12) at heat exchanging segment cylindrical shell (11) simultaneously.
- [claim 3] formaldehyde reaction device with floating tubesheet structure according to claim 2 is characterized in that: described expansion joint (12) is bulge loop or scrobicular ring in radially moulding.
- [claim 4] formaldehyde reaction device with floating tubesheet structure according to claim 2 is characterized in that: conversion zone cylindrical shell (10) and heat exchanging segment cylindrical shell (11) are same integral body.
- [claim 5] formaldehyde reaction device with floating tubesheet structure according to claim 2, it is characterized in that: conversion zone cylindrical shell (10) and heat exchanging segment cylindrical shell (11) are chorista, conversion zone cylindrical shell (10) lower end be built in heat exchanging segment cylindrical shell (11) suitable for reading in, heat exchanging segment cylindrical shell (11) is suitable for reading to be connected with conversion zone cylindrical shell (10) by ring-type web plate (13), and tube sheet (3) is located at conversion zone cylindrical shell (10) bottom.
- [claim 6] formaldehyde reaction device with floating tubesheet structure according to claim 5 is characterized in that: when conversion zone cylindrical shell (10) was provided with expansion joint (12), ring-type web plate (13) was on the expansion joint (12).
- [claim 7] formaldehyde reaction device with floating tubesheet structure according to claim 6 is characterized in that: the expansion joint (12) on the conversion zone cylindrical shell (10) is a bulge loop, and its diameter is less than heat exchanging segment cylindrical shell (11) back cut diameter.
- [claim 8] formaldehyde reaction device with floating tubesheet structure according to claim 6 is characterized in that: the expansion joint (12) on the heat exchanging segment cylindrical shell (11) is positioned at tube sheet (3) below.
- [claim 9] is characterized in that according to any one described formaldehyde reaction device with floating tubesheet structure in the claim 1～8: tube sheet (3) adopts flat butterfly end socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820301675XU CN201245578Y (en) | 2008-08-01 | 2008-08-01 | Formaldehyde reactor with floating tube sheet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820301675XU CN201245578Y (en) | 2008-08-01 | 2008-08-01 | Formaldehyde reactor with floating tube sheet structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201245578Y true CN201245578Y (en) | 2009-05-27 |
Family
ID=40729397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820301675XU Expired - Fee Related CN201245578Y (en) | 2008-08-01 | 2008-08-01 | Formaldehyde reactor with floating tube sheet structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201245578Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104689765A (en) * | 2015-03-24 | 2015-06-10 | 江苏凯茂石化科技有限公司 | Formaldehyde oxidation device with expansion joint |
| CN104772080A (en) * | 2015-03-24 | 2015-07-15 | 江苏凯茂石化科技有限公司 | Over 120000 ton level long-life formaldehyde oxidation device |
-
2008
- 2008-08-01 CN CNU200820301675XU patent/CN201245578Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104689765A (en) * | 2015-03-24 | 2015-06-10 | 江苏凯茂石化科技有限公司 | Formaldehyde oxidation device with expansion joint |
| CN104772080A (en) * | 2015-03-24 | 2015-07-15 | 江苏凯茂石化科技有限公司 | Over 120000 ton level long-life formaldehyde oxidation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20160801 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |