CN216011868U - Steam distributor for heat exchanger - Google Patents
Steam distributor for heat exchanger Download PDFInfo
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- CN216011868U CN216011868U CN202121655765.0U CN202121655765U CN216011868U CN 216011868 U CN216011868 U CN 216011868U CN 202121655765 U CN202121655765 U CN 202121655765U CN 216011868 U CN216011868 U CN 216011868U
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Abstract
The utility model provides a steam distributor for a heat exchanger, which belongs to the technical field of shell-and-tube heat exchangers and comprises a shell-side cylinder and a peripheral shell; the shell-side barrel is used for being connected to the heat exchanger, a plurality of heat exchange tubes are arranged in the shell-side barrel along the axial direction, and a plurality of circulation ports are formed in the side wall of the shell-side barrel; the peripheral shell is sleeved on the outer side of the shell pass cylinder, and a buffer cavity is formed between the peripheral shell and the shell pass cylinder; the upper end of the peripheral shell is provided with a steam inlet pipe orifice for communicating the buffer cavity with an external steam pipeline; the lower end of the peripheral shell is provided with a condensed water discharge port. According to the steam distributor for the heat exchanger, steam is effectively blocked by the shell pass cylinder after entering the buffer cavity, the flow velocity is reduced, the steam is uniformly distributed in the buffer cavity, and the steam flows into the shell pass cylinder from the circulation port to exchange heat; effectively reduces the impact on the heat exchange pipe and solves the problem of low heat exchange efficiency caused by uneven steam distribution.
Description
Technical Field
The utility model belongs to the technical field of shell-and-tube heat exchangers, and particularly relates to a steam distributor for a heat exchanger.
Background
In the application field of shell-and-tube heat exchangers, steam is taken as a working medium for heating and generally flows through a shell pass, and the steam entering the shell pass has the characteristic of high temperature, high pressure and high flow velocity, so that the steam can erode and corrode the heat exchange tube after being introduced into the shell pass, and the fluid flowing at high speed can cause the vibration of the tube bundle to induce the leakage of the tube bundle, so that the structure that a baffle is added at a steam inlet with certain energy is generally required in the standard so as to reduce the impact of the steam on the heat exchange tube.
At present, the baffle is installed in orificial bottom more, for satisfying the energy requirement, needs reserve sufficient axial clearance for the baffle, and this must influence the stringing space of heat exchange tube, reduces the quantity of heat exchange tube, reduces the heat transfer area in the unit volume. And the steam flows unevenly in the heat exchanger after passing through the baffle, so that the utilization rate of the steam is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a steam distributor for a heat exchanger, which aims to achieve the aims of avoiding steam from impacting a tube bundle and uniformly distributing the steam.
In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a steam distributor for a heat exchanger, comprising:
the shell-side barrel is used for being connected to the heat exchanger, a plurality of heat exchange tubes arranged along the axial direction are arranged in the shell-side barrel, and a plurality of flow ports distributed in the circumferential direction are formed in the side wall of the shell-side barrel;
the peripheral shell is sleeved on the outer side of the shell pass cylinder, and a buffer cavity is formed between the peripheral shell and the shell pass cylinder; the upper end of the peripheral shell is provided with a steam inlet pipe orifice for communicating the buffer cavity with an external steam pipeline; and a condensed water discharge port communicated with the buffer cavity is arranged at the lower end of the peripheral shell.
As another embodiment of the present application, a longitudinal projection of the steam inlet pipe orifice is located between two adjacent circulation ports above the shell-side cylinder.
As another embodiment of the present application, the peripheral shell is disposed coaxially with the shell-side cylinder.
As another embodiment of the present application, the peripheral shell is welded to the outer sidewall of the shell-side cylinder.
As another embodiment of the application, the area of the axial section of the buffer cavity is larger than the area of the flow-passing section of the steam inlet pipe opening.
As another embodiment of the present application, the plurality of flow openings are uniformly distributed on the side wall of the shell-side cylinder.
As another embodiment of the present application, the flow section of the flow port is rectangular.
As another embodiment of the present application, the circulation ports are provided in plural sets at intervals in the axial direction of the shell-side cylinder.
As another embodiment of the application, the area of the flow cross section of the condensate water discharge port is smaller than that of the flow cross section of the steam inlet pipe opening.
As another embodiment of the application, an opening and closing valve is connected with the condensed water discharge port.
The steam distributor for the heat exchanger has the advantages that: compared with the prior art, the steam distributor for the heat exchanger has the advantages that steam is effectively blocked by the shell pass cylinder after entering the buffer cavity, is uniformly distributed in the buffer cavity after the flow rate is reduced, and flows into the shell pass cylinder from the circulation port for heat exchange; in the process, the quality of the steam is uniformly distributed, the flow rate is greatly reduced, the impact effect on the heat exchange pipe is avoided, the impact on the heat exchange pipe is effectively reduced, and the problem of low heat exchange efficiency caused by non-uniform distribution of the steam is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described 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 without creative efforts.
FIG. 1 is a schematic structural diagram of a steam distributor for a heat exchanger according to an embodiment of the present invention;
fig. 2 is a schematic view of a steam flow of a steam distributor for a heat exchanger according to an embodiment of the present invention.
In the figure: 10. a heat exchanger; 11. a heat exchange pipe; 20. a shell-side cylinder; 21. a flow port; 30. a peripheral housing; 31. an inlet pipe orifice; 32. a condensed water discharge port.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and 2, a steam distributor for a heat exchanger according to the present invention will now be described. The steam distributor for the heat exchanger comprises a shell pass cylinder 20 and a peripheral shell 30; the shell-side cylinder 20 is used for being connected to the heat exchanger 10, a plurality of heat exchange tubes 11 arranged along the axial direction are arranged in the shell-side cylinder 20, and a plurality of circulation ports 21 distributed in the circumferential direction are arranged on the side wall of the shell-side cylinder 20; the peripheral shell 30 is sleeved on the outer side of the shell-side cylinder 20, and a buffer cavity is formed between the peripheral shell 30 and the shell-side cylinder 20; the upper end of the peripheral shell 30 is provided with a steam inlet pipe orifice 31 for communicating the buffer cavity with an external steam pipeline; the lower end of the peripheral casing 30 is provided with a condensate water discharge port 32 communicating with the buffer chamber.
Compared with the prior art, the steam distributor for the heat exchanger provided by the utility model has the advantages that the shell-side cylinder 20 is connected to the heat exchanger 10, the side wall of the shell-side cylinder 20 is provided with a plurality of circulation ports 21, and the circulation ports 21 are distributed along the circumferential direction of the shell-side cylinder 20; the outer side of the shell-side cylinder 20 is provided with a peripheral shell 30, the outer side wall of the shell-side cylinder 20 and the inner side wall of the peripheral shell 30 are enclosed to form a buffer cavity, the buffer cavity is respectively communicated with an upper steam inlet pipe orifice 31 and a lower condensed water discharge orifice 32, the steam inlet pipe orifice 31 is arranged on the peripheral shell 30, and the steam inlet pipe orifice 31 is correspondingly arranged above the side wall between the upper circulation ports 21 of the shell-side cylinder 20.
Steam enters from the steam inlet pipe orifice 31 and fills the buffer cavity, and enters the shell side cylinder body 20 through the circulation port 21; after entering the shell-side cylinder 20, the steam fully exchanges heat with the heat exchange tubes 11 in the shell-side cylinder 20. In the heat exchange process, steam can be condensed into water drops when meeting cold in the shell-side cylinder 20 or the buffer cavity, condensed water in the shell-side cylinder 20 flows out from the flow opening 21 at the lower part of the shell-side cylinder 20 and is converged with the condensed water in the buffer cavity, and after the heat exchanger 10 stops working, the condensed water discharge port 32 is opened to discharge the condensed water.
According to the steam distributor for the heat exchanger, steam is effectively blocked by the shell pass cylinder 20 after entering the buffer cavity, the flow rate is reduced, the steam is uniformly distributed in the buffer cavity, and the steam flows into the shell pass cylinder 20 from the circulation port 21 to exchange heat; in the process, the quality of the steam is uniformly distributed, the flow rate is greatly reduced, and the impact effect on the heat exchange pipe 11 is avoided, so that the impact on the heat exchange pipe 11 is effectively reduced, and the problem of low heat exchange efficiency caused by non-uniform distribution of the steam is solved.
Optionally, the plurality of heat exchange tubes 11 are arranged at intervals, and steam flows between the heat exchange tubes 11 and fully contacts with the outer walls of the heat exchange tubes 11, so that the heat exchange efficiency is ensured.
Referring to fig. 1 and 2, a longitudinal projection of the steam inlet pipe 31 is located between two adjacent flow openings 21 above the shell-side cylinder 20. In this embodiment, the steam inlet 31 is located above the shell-side cylinder 20, and the longitudinal downward projection of the steam inlet 31 falls on the side wall of the shell-side cylinder 20 between two adjacent flow openings 21 above the shell-side cylinder 20. Steam enters the buffer cavity from the steam inlet pipe orifice 31, is decelerated and uniformly distributed in the buffer cavity after being blocked by the shell-side cylinder 20, enters the shell-side cylinder 20 through the flow-assisting opening 21, exchanges heat with the heat exchange pipe 11, and avoids the phenomenon that the steam directly enters the shell-side cylinder 20 and impacts the heat exchange pipe 11.
Referring to fig. 1 and 2, as an embodiment of the steam distributor for a heat exchanger according to the present invention, a peripheral shell 30 is coaxially disposed with a shell-side cylinder 20. In this embodiment, the peripheral casing 30 includes curb plate and two ring-shaped end plates, and two ring-shaped end plates are connected respectively at the both ends of curb plate, and the tip at the curb plate is connected to the outward flange of ring-shaped end plate, and the inward flange of ring-shaped end plate is connected on the lateral wall of shell side barrel 20, and the lateral wall of curb plate and shell side barrel 20 is connected to the ring-shaped end plate for fix the curb plate and form peripheral casing 30 in the outside of shell side barrel 20, form the cushion chamber between peripheral casing 30 and the shell side barrel 20.
Optionally, the peripheral shell 30 is welded to the outer sidewall of the shell-side cylinder 20. The inner edge of the annular end plate is welded on the outer side wall of the shell pass cylinder 20, and the outer edge of the annular end plate and the side plate are welded and fixed.
Optionally, the side plates and the outer side wall of the shell-side cylinder 20 are surrounded by annular end plates at both ends to form a buffer cavity with an annular cross section. The area of the axial section of the buffer cavity is larger than the area of the overflowing section of the steam inlet pipe orifice 31, and the flow speed of steam entering the buffer cavity from the steam inlet pipe orifice 31 is reduced until the steam is uniformly distributed in the buffer cavity.
Referring to fig. 1 and 2, a plurality of flow openings 21 are uniformly distributed on the side wall of the shell-side cylinder 20. In this embodiment, a plurality of circulation ports 21 are formed in the side wall of the shell-side cylinder 20 along the circumferential direction of the shell-side cylinder 20, the plurality of circulation ports 21 are uniformly distributed, and the distance between two adjacent circulation ports 21 is the same.
Alternatively, the flow-through port 21 has a rectangular flow-through cross section.
Optionally, the circulation ports 21 are provided in plural sets at intervals along the axial direction of the shell-side cylinder 20.
Optionally, the shell-side cylinder 20 is welded and fixed to the cylinder of the heat exchanger 10.
Optionally, the shell-side cylinder 20 is a part of the heat exchanger 10, a plurality of circulation ports 21 are formed in the shell-side cylinder 20 of the heat exchanger 10, a peripheral shell 30 is sleeved at a position where the circulation ports 21 are further arranged, the peripheral shell 30 and the shell-side cylinder 20 are enclosed to form a buffer cavity, and the circulation ports 21 are used for communicating the buffer cavity with the inside of the shell-side cylinder 20.
Referring to fig. 1 and 2, as an embodiment of the steam distributor for a heat exchanger according to the present invention, an area of a flow cross section of the condensed water discharge port 32 is smaller than an area of a flow cross section of the steam inlet pipe port 31. In this embodiment, the steam inlet pipe port 31 and the condensed water discharge port 32 are respectively disposed at the upper end and the lower end of the peripheral shell 30, and the condensed water discharge port 32 is used for discharging condensed water in the buffer cavity when the heat exchanger 10 does not work, so as to reduce corrosion of the condensed water to the shell-side cylinder 20 and the peripheral shell 30; a condensate discharge port 32 is provided at a lower end of the outer casing 30 to facilitate evacuation of condensate. The steam inlet pipe mouth 31 is used for externally connecting external steam, and the volume of the steam passing through the steam inlet pipe mouth is far larger than the volume of the condensed water to be discharged from the condensed water discharge port 32, so that the area of the overflowing section of the steam inlet pipe mouth 31 is larger than that of the overflowing section of the condensed water discharge port 32.
Optionally, the condensed water discharge port 32 is connected to an open/close valve for controlling an open/close state of the condensed water discharge port 32. When the heat exchanger 10 works, the opening and closing valve is closed, and the steam is prevented from overflowing from the condensed water discharge port 32; after the heat exchanger 10 stops working, the opening and closing valve is opened, condensed water accumulated in the peripheral shell 30 is discharged, and the corrosion of the shell side cylinder 20 and the peripheral shell 30 caused by the condensed water is reduced.
Optionally, the steam inlet pipe mouth 31 is welded to the peripheral shell 30.
Alternatively, the condensed water drain port 32 is welded to the outer case 30.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Steam distributor for the heat exchanger, its characterized in that includes:
the shell-side barrel is used for being connected to the heat exchanger, a plurality of heat exchange tubes arranged along the axial direction are arranged in the shell-side barrel, and a plurality of flow ports distributed in the circumferential direction are formed in the side wall of the shell-side barrel;
the peripheral shell is sleeved on the outer side of the shell pass cylinder, and a buffer cavity is formed between the peripheral shell and the shell pass cylinder; the upper end of the peripheral shell is provided with a steam inlet pipe orifice for communicating the buffer cavity with an external steam pipeline; and a condensed water discharge port communicated with the buffer cavity is arranged at the lower end of the peripheral shell.
2. The steam distributor for a heat exchanger of claim 1, wherein a longitudinal projection of said steam inlet pipe opening is located between two adjacent said flow openings above said shell-side cylinder.
3. The steam distributor for a heat exchanger of claim 2, wherein the peripheral shell is disposed coaxially with the shell-side cylinder.
4. The steam distributor for a heat exchanger of claim 3, wherein the peripheral shell is welded to an outer sidewall of the shell-side cylinder.
5. The steam distributor for a heat exchanger of claim 3, wherein the area of the axial cross section of the buffer chamber is larger than the area of the flow cross section of the steam inlet pipe orifice.
6. The steam distributor for a heat exchanger of claim 1, wherein the plurality of flow openings are uniformly distributed on the side wall of the shell-side cylinder.
7. The steam distributor for a heat exchanger of claim 6, wherein the flow-through openings have a rectangular cross-section.
8. The steam distributor for a heat exchanger of claim 6, wherein the flow ports are provided in a plurality of sets at intervals in an axial direction of the shell-side cylinder.
9. The steam distributor for a heat exchanger as set forth in claim 1, wherein the area of the flow cross section of said condensate discharge port is smaller than the area of the flow cross section of said steam inlet pipe port.
10. The steam distributor for a heat exchanger as set forth in claim 9, wherein an opening and closing valve is connected to said condensed water discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121655765.0U CN216011868U (en) | 2021-07-20 | 2021-07-20 | Steam distributor for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121655765.0U CN216011868U (en) | 2021-07-20 | 2021-07-20 | Steam distributor for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216011868U true CN216011868U (en) | 2022-03-11 |
Family
ID=80590368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121655765.0U Active CN216011868U (en) | 2021-07-20 | 2021-07-20 | Steam distributor for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216011868U (en) |
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2021
- 2021-07-20 CN CN202121655765.0U patent/CN216011868U/en active Active
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