CN204478901U - High-temperature heat-exchanging floating tube sheet structure - Google Patents
High-temperature heat-exchanging floating tube sheet structure Download PDFInfo
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- CN204478901U CN204478901U CN201520079223.1U CN201520079223U CN204478901U CN 204478901 U CN204478901 U CN 204478901U CN 201520079223 U CN201520079223 U CN 201520079223U CN 204478901 U CN204478901 U CN 204478901U
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Abstract
The utility model relates to the partial structurtes of chemical industry equipment, be applied in chemical industry, petrochemical plant manage, high temp, vertical heat exchanger, particularly a kind of high-temperature heat-exchanging floating tube sheet structure that shell side wall temperature difference is larger.It is arranged on has in the shell side housing of fixed form lower perforated plate; It is characterized in that: comprise a floating type upper perforated plate, between floating type upper perforated plate and lower perforated plate, be provided with tube bank; This shell side housing upper end is welded with Outer Taper lower end; Outer Taper upper end is welded with processing medium entrance lower end; Floating type upper perforated plate welds with an inner cone lower end, and this inner cone upper end is welded with expansion joint lower end, and expansion joint upper end is welded with Outer Taper.Its structure is more reasonable, reliable, extends to large-scale vertical high-temperature heat-exchanging housing and the larger occasion of interbank wall temperature difference.
Description
Technical field
The utility model relates to the partial structurtes of chemical industry equipment, be applied in chemical industry, petrochemical plant manage, high temp, vertical heat exchanger, particularly a kind of high-temperature heat-exchanging floating tube sheet structure that shell side wall temperature difference is larger.
Background technology
The vertical heat exchanger of high-temperature steam heating process medium is adopted in chemical industry, petrochemical plant.Shell side steam inlet temperature is close to 900 DEG C, tube side processing medium inlet temperature only about 500 DEG C, because shell side housing and interbank wall temperature difference are comparatively large, in order to reduce or eliminate thermal (temperature difference) stress, usually adopt shell side that fixed tube-sheet exchanger or the movable tube sheets heat exchanger of expansion joint are set.
Existing structure one (Fig. 1): heat exchanger is according to fixed tube sheet type, and when shell side housing 4 and tube bank 8 wall temperature differences are large, shell side housing 4 need arrange expansion joint 5, absorbs the differential expansion between shell side housing 4 and tube bank 8.The shortcoming of this structure is: 1. expansion joint is arranged on shell side housing, diameter of the housing is larger, under same design pressure, temperature and compensation rate require, the physical dimension of required expansion joint is larger, and compensation ability reduces, and anti-fatigue performance declines, material consumption is more, make mould larger, and can only select nickel-base alloy by design temperature, equipment investment increases greatly; 2. domestic most expansion joint producer is little to large diameter expansion joint manufacturing experience like this, also just adds manufacture difficulty.
Existing structure two (Fig. 2): the occasion that wall temperature difference is larger between shell side housing 4 and tube bank 8, also can adopt movable tube sheets heat exchanger.Movable tube sheets heat exchanger one end is floating tubesheet, and tube bank 8 is expanded and do not retrained by shell side housing 4, can not produce thermal (temperature difference) stress.Shortcoming is: 1. floating head heat exchanger floating head end structure is complicated, heavy, and outer skull raises the nose above water to breathe to hold because placing, and need enlarged diameter, contour size of the unit(s) and weight all increase, and greatly, cost is high, and cost ratio fixed tube sheet type is about high by 20% for consumption of materials; 2. raise the nose above water to breathe to hold tube sheet to adopt flange gasket sealing, interior leakage easily occurs; 3. the annular space between tube bank and shell side housing is comparatively large, the easy short circuit of shell side side liquid; 4. because shell side vapor (steam) temperature is higher, flange sealing structure should not be adopted.
Utility model content
The purpose of this utility model is to provide a kind of high-temperature heat-exchanging floating tube sheet structure, mainly solve the technical problem existing for above-mentioned prior art, its structure is more reasonable, reliable, extends to large-scale vertical high-temperature heat-exchanging housing and the larger occasion of interbank wall temperature difference.
For achieving the above object, the utility model realizes like this.
A kind of high-temperature heat-exchanging floating tube sheet structure, it is arranged on has in the shell side housing of fixed form lower perforated plate; It is characterized in that: comprise a floating type upper perforated plate, between floating type upper perforated plate and lower perforated plate, be provided with tube bank; This shell side housing upper end is welded with Outer Taper lower end; Outer Taper upper end is welded with processing medium entrance lower end; Floating type upper perforated plate welds with an inner cone lower end, and this inner cone upper end is welded with expansion joint lower end, and expansion joint upper end is welded with Outer Taper.
Described high-temperature heat-exchanging floating tube sheet structure, is characterized in that: have gap between this upper perforated plate and shell side housing.
Described high-temperature heat-exchanging floating tube sheet structure, is characterized in that: this upper perforated plate is can floating structure.
Described high-temperature heat-exchanging floating tube sheet structure, is characterized in that: this expansion joint is built in shell side housing.
Technique effect of the present utility model is: the utility model structure is simple, is easy to manufacture, install, and simultaneously by the restriction of shell-side high temperature section temperature, strong adaptability, extends to large high-temperature vertical heat exchanger housing and the larger occasion of interbank wall temperature difference.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of vertical heat exchanger.
In Fig. 1: 1-high-temperature steam outlet; 2-processing medium entrance; 3-upper perforated plate; 4-shell side housing; 5-expansion joint; 6-high-temperature steam entrance; 7-lower perforated plate; 8-tube bank.
Fig. 2 is the structural representation of existing another kind of vertical heat exchanger.
In Fig. 2: 31-upper perforated plate; 4-shell side housing; 71-lower perforated plate; 8-tube bank; 9-outer skull; 10-raise the nose above water to breathe to hold.
Fig. 3 is structural representation of the present utility model.
Partial enlargement structure chart in Fig. 4 in the utility model between upper perforated plate and shell side housing.
In Fig. 3-4: 1-high-temperature steam outlet; 2-processing medium entrance; 32-upper perforated plate; 4-shell side housing; 5-expansion joint; 6-high-temperature steam entrance; 72-lower perforated plate; 8-tube bank; 11-inner cone; 12-Outer Taper; 13-gap.
Detailed description of the invention
Refer to Fig. 3, the utility model discloses a kind of high-temperature heat-exchanging floating tube sheet structure.As shown in the figure: it is arranged on has in the shell side housing 4 of fixed form lower perforated plate 72; Comprise a floating type upper perforated plate 32, between floating type upper perforated plate 32 and lower perforated plate 72, be provided with tube bank 8; This shell side housing 4 upper end is welded with Outer Taper 12 lower end; Outer Taper 12 upper end is welded with processing medium entrance 2 lower end; Floating type upper perforated plate 32 welds with inner cone 11 lower end, and this inner cone 11 upper end is welded with expansion joint 5 lower end, and expansion joint 5 upper end is welded with Outer Taper 12.
As Fig. 4, between this upper perforated plate 32 and shell side housing 4, there is gap 13.
As Fig. 3-4, this upper perforated plate 32 can float.
As Fig. 3-4, this expansion joint 5 is built in shell side housing 4.
Of the present utility modelly to be characterized in: 1. upper perforated plate can free floating, and shell side housing and interbank differential expansion are absorbed by built-in expansion joint; 2. adopt Welding Structure to seal between pipe, shell side, avoid leaking; 3. built-in expansion joint is arranged on tube side, avoids directly contacting high-temperature steam, and expansion joint design temperature reduces; 4. expansion joint internal diameter is equal with processing medium import internal diameter, and physical dimension reduces greatly; Compensation ability and anti-fatigue performance improve.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model.Namely all equivalences done according to the content of the utility model claim change and modify, and all should be technology category of the present utility model.
Claims (4)
1. a high-temperature heat-exchanging floating tube sheet structure, it is arranged on has in the shell side housing (4) of fixed form lower perforated plate (72); It is characterized in that: comprise a floating type upper perforated plate (32), be provided with between floating type upper perforated plate (32) and lower perforated plate (72) and restrain (8); This shell side housing (4) upper end is welded with Outer Taper (12) lower end; Outer Taper (12) upper end is welded with processing medium entrance (2) lower end; Floating type upper perforated plate (32) welds with an inner cone (11) lower end, and this inner cone (11) upper end is welded with expansion joint (5) lower end, and expansion joint (5) upper end is welded with Outer Taper (12).
2. high-temperature heat-exchanging floating tube sheet structure according to claim 1, is characterized in that: have gap (13) between this upper perforated plate (32) and shell side housing (4).
3. high-temperature heat-exchanging floating tube sheet structure according to claim 1 and 2, is characterized in that: this upper perforated plate (32) is can floating structure.
4. high-temperature heat-exchanging floating tube sheet structure according to claim 1 and 2, is characterized in that: this expansion joint (5) is built in shell side housing (4).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520079223.1U CN204478901U (en) | 2015-02-05 | 2015-02-05 | High-temperature heat-exchanging floating tube sheet structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520079223.1U CN204478901U (en) | 2015-02-05 | 2015-02-05 | High-temperature heat-exchanging floating tube sheet structure |
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CN204478901U true CN204478901U (en) | 2015-07-15 |
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CN201520079223.1U Active CN204478901U (en) | 2015-02-05 | 2015-02-05 | High-temperature heat-exchanging floating tube sheet structure |
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2015
- 2015-02-05 CN CN201520079223.1U patent/CN204478901U/en active Active
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