CN216260661U - Double-helix heat exchange reactor - Google Patents
Double-helix heat exchange reactor Download PDFInfo
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- CN216260661U CN216260661U CN202122564542.XU CN202122564542U CN216260661U CN 216260661 U CN216260661 U CN 216260661U CN 202122564542 U CN202122564542 U CN 202122564542U CN 216260661 U CN216260661 U CN 216260661U
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Abstract
The utility model relates to a double-helix heat exchange reactor, which comprises a reaction cylinder body, wherein the upper end of the reaction cylinder body is provided with a reaction material inlet and an upper tube plate, and the bottom end of the reaction cylinder body is provided with a lower tube plate and a reaction material outlet; a reaction tube is vertically arranged between the upper tube plate and the lower tube plate in the reaction cylinder body, and a catalyst is filled in the reaction tube; a double-spiral heat exchange partition plate is also arranged in the reaction barrel, the top end of the double-spiral heat exchange partition plate is connected with an upper tube plate, the bottom end of the double-spiral heat exchange partition plate is connected with a lower tube plate, the periphery of the double-spiral heat exchange partition plate is connected with the inner wall of the reaction barrel, and the reaction tube penetrates through the double-spiral heat exchange partition plate; two ends of each spiral heat exchange partition plate are respectively provided with a heat exchange medium inlet and a heat exchange medium outlet, and the two heat exchange medium inlets are not simultaneously arranged on the upper tube plate/the lower tube plate. The utility model divides the heat exchange area of the conventional fixed tubular reactor into two parts by using the heat exchange partition plate with the double-spiral structure, realizes the reverse flow of two heat exchange media, improves the heat exchange effect, reduces the temperature difference between the inlet and the outlet of the reaction tube and ensures the uniform temperature of the catalytic reactor.
Description
Technical Field
The utility model belongs to a heat exchanger, which mainly realizes high-efficiency heat exchange through a double-spiral structure.
Background
Catalytic reactors have important applications in the chemical industry. Currently, the form of the catalytic reactor mainly includes a fixed bed reactor, a fluidized bed reactor, a slurry bed reactor, and the like, wherein a fixed bed is common. On the basis, the fixed bed catalytic reactor can be divided into a fixed tube type catalytic reactor, a wound tube type catalytic reactor, a heat insulation type catalytic reactor and the like according to a heat exchange mode. The main reason for this classification is that the catalytic reaction process is often accompanied by certain endothermic and exothermic processes. For some reactions where the thermal effect is not very intense, adiabatic catalytic reactors may be used; for the reaction with stronger heat effect, the heat must be supplemented or removed by a heat exchange medium so as to achieve the purpose of controlling the temperature of the catalyst bed layer.
The structure of the fixed tubular catalytic reactor is similar to that of the tubular heat exchanger, the catalyst is filled in the tubular heat exchanger, and the shell side is used for carrying away a heat exchange medium, so that high-efficiency heat exchange is realized. However, such reactors usually have only one heat exchange medium inlet and one heat exchange medium outlet, which is more likely to cause a temperature gradient along the length of the reaction tube, and thus cannot well realize uniform control of the reaction temperature. For example, when the reaction is endothermic, the temperature of the heat exchange medium providing the heat is reduced at the heat exchange medium outlet as it flows through the reactor, which results in a higher catalyst bed temperature near the heat exchange medium inlet and a lower catalyst bed temperature near the heat exchange medium outlet. For certain reaction processes where precise control of the reaction temperature is required, the smaller the temperature gradient, the better.
In order to realize accurate control of the reaction temperature, a multi-inlet and multi-outlet wound tube heat exchanger is developed, wherein heat exchange media flow in different heat exchange tubes, so that the temperature of the whole reactor is relatively uniform. However, the processing difficulty of the coiled tube heat exchanger is large, and the filling mode of the catalyst is greatly different from that of a fixed tube type, which is not suitable for some reactions.
On this basis, this scheme has developed a fixed shell and tube heat transfer reactor of double helix structure, and wherein heat transfer medium flow area is divided into two parts by double bolt structure to realize heat transfer medium's reverse flow, and then make the catalyst temperature in the reactor shell and tube more even.
Disclosure of Invention
The utility model aims to solve the problems, and provides a catalytic reactor with high heat exchange efficiency, wherein a heat exchange area is divided into two parts by a double-bolt structure, a heat exchange medium enters from different channels of the double-bolt structure, and the two parts of the heat exchange medium flow in a countercurrent manner, so that the temperature of a catalyst in a reactor tube is more uniform while the heat exchange effect is enhanced, and the stable operation of the reaction process is ensured.
The technical scheme of the utility model is as follows:
a double-helix heat exchange reactor comprises a reaction cylinder body, wherein the upper end of the reaction cylinder body is provided with a reaction material inlet and an upper tube plate, and the bottom end of the reaction cylinder body is provided with a lower tube plate and a reaction material outlet; a reaction tube is vertically arranged between the upper tube plate and the lower tube plate in the reaction cylinder body, and a catalyst is filled in the reaction tube; a double-spiral heat exchange partition plate is also arranged in the reaction barrel, the top end of the double-spiral heat exchange partition plate is connected with an upper tube plate, the bottom end of the double-spiral heat exchange partition plate is connected with a lower tube plate, the periphery of the double-spiral heat exchange partition plate is connected with the inner wall of the reaction barrel, and the reaction tube penetrates through the double-spiral heat exchange partition plate; two ends of each spiral heat exchange partition plate are respectively provided with a heat exchange medium inlet and a heat exchange medium outlet, and the two heat exchange medium inlets are not simultaneously arranged at the upper tube plate/the lower tube plate.
The double-spiral heat exchange partition plates comprise odd layers of spiral heat exchange partition plates and even layers of spiral heat exchange partition plates, heat exchange medium inlets of the odd layers of spiral heat exchange partition plates are arranged at the upper tube plate, and heat exchange medium outlets of the odd layers of spiral heat exchange partition plates are arranged at the lower tube plate; the heat exchange medium inlets of the even layers of spiral heat exchange clapboards are arranged at the lower tube plate, and the heat exchange medium outlets of the even layers of spiral heat exchange clapboards are arranged at the upper tube plate.
The distance between spiral layers in the double-spiral heat exchange partition plate is 1/10-1/2 of the inner diameter of the reaction cylinder.
The heat exchange device is characterized by further comprising transverse plates arranged on each spiral layer in the double-spiral heat exchange partition plate, wherein each transverse plate is in a zigzag shape, is 5-20mm in height and deflects an angle a towards a perpendicular bisector of the reaction cylinder body, and the angle a is 5-45 degrees.
The utility model has the technical effects that:
according to the method provided by the utility model, the heat exchange partition plate with a double-spiral structure is used for dividing the heat exchange area of the conventional fixed tubular reactor into two parts, so that the two heat exchange media flow reversely, the heat exchange effect is improved, the temperature difference between the inlet and the outlet of the reaction tube is reduced, and the temperature uniformity of the catalytic reactor is ensured.
Drawings
FIG. 1 is a schematic diagram of a double spiral heat exchange reactor according to the present invention.
FIG. 2 is a schematic structural view of the cross plate of the present invention.
Reference numerals: 1. A reaction cylinder; 2. an upper tube sheet; 3. a reaction tube; 4. a double helix heat exchange baffle plate; 5. a reaction material inlet; 6. a reaction material outlet; 7. heat exchange medium inlets of the odd layers of spiral heat exchange clapboards; 8. heat exchange medium inlets of even layers of spiral heat exchange clapboards; 9. heat exchange medium outlets of the spiral heat exchange partition plates of the even number of layers; 10. the heat exchange medium outlet of the odd layers of spiral heat exchange clapboards; 11. a transverse plate; 12. a lower tube plate.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Embodiment 1 a double helix heat exchanger reactor, including a reaction cylinder 1, the upper end of the reaction cylinder 1 is provided with a reaction material inlet 5 and an upper tube plate 2, and the bottom end is provided with a lower tube plate 12 and a reaction material outlet 6; a reaction tube 3 is vertically arranged between the upper tube plate 2 and the lower tube plate 12 in the reaction cylinder 1, and the reaction tube 3 is filled with a catalyst and used for a catalytic reaction process; a reaction material inlet 5 enters from a reaction medium inlet, and a product obtained by reaction flows out from a reaction material outlet 6;
in order to further improve the heat exchange effect, a double-spiral heat exchange partition plate 4 is also arranged in the reaction cylinder 1, the top end of the double-spiral heat exchange partition plate 4 is connected with the upper tube plate 2, the bottom end of the double-spiral heat exchange partition plate 4 is connected with the lower tube plate 12, the periphery of the double-spiral heat exchange partition plate is connected with the inner wall of the reaction cylinder 1, and the reaction tubes 3 penetrate through the double-spiral heat exchange partition plate 4; two ends of each spiral heat exchange partition plate are respectively provided with a heat exchange medium inlet and a heat exchange medium outlet, and the two heat exchange medium inlets are not simultaneously arranged at the upper tube plate 2/the lower tube plate 12.
As shown in fig. 1, the double-spiral heat exchange partition plate 4 divides the heat exchange area in the reaction cylinder 1 into two parts in the diameter direction, namely the double-spiral heat exchange partition plate 4 comprises an odd number layer of spiral heat exchange partition plates and an even number layer of spiral heat exchange partition plates, and the two parts are isolated from each other; the heat exchange medium inlet 7 of the odd-numbered layer of spiral heat exchange partition plates is arranged at the upper tube plate 2, and the heat exchange medium outlet 10 of the odd-numbered layer of spiral heat exchange partition plates is arranged at the lower tube plate 12; the heat exchange medium inlets 8 of the spiral heat exchange clapboards at the even layers are arranged at the lower tube plate 12, and the heat exchange medium outlets are arranged at the upper tube plate 2.
In order to maintain the countercurrent heat exchange of the heat exchange medium, the heat exchange medium respectively enters from a heat exchange medium inlet 7 of an odd layer spiral heat exchange partition plate positioned at the upper tube plate 2 and a heat exchange medium inlet 8 of an even layer spiral heat exchange partition plate positioned at the lower tube plate 12, two heat exchange media reversely flow, the heat exchange medium entering from the heat exchange medium inlet 7 of the odd layer spiral heat exchange partition plate flows out from a heat exchange medium outlet 10 of the odd layer spiral heat exchange partition plate positioned at the lower tube plate 12, and the heat exchange medium entering from the heat exchange medium inlet 8 of the even layer spiral heat exchange partition plate flows out from a heat exchange medium outlet 9 of the even layer spiral heat exchange partition plate positioned at the upper tube plate 2. The reaction tubes 3 at the same height are respectively contacted with two heat exchange media, and the two heat exchange media can also transfer heat mutually, so that the temperature of the reaction tubes 3 is uniform along the length direction.
Example 2
On the basis of embodiment 1, the method further comprises the following steps: the distance between the spiral layers in the double-spiral heat exchange partition plate 4 is 1/10-1/2 of the inner diameter of the reaction cylinder body 1; the smaller the spacing, the smaller the temperature difference, which needs to be determined according to the reaction temperature requirement.
Example 3
On the basis of embodiment 2, in order to further enhance the heat exchange effect, the method further comprises the following steps: the reaction device also comprises a transverse plate 11 arranged on each spiral layer in the double-spiral heat exchange partition plate 4, wherein the transverse plate 11 is in a zigzag shape, is 5-20mm in height and deflects towards a perpendicular bisector of the reaction cylinder 1 by an angle a, and the angle a is 5-45 degrees. After the fluid meets the transverse plate 11, disturbance is formed, the turbulent motion effect is increased, and the heat exchange is improved.
With the above embodiment, the following effects can be achieved:
when a conventional fixed tube-plate heat exchanger is adopted, the temperature difference between the inlet and the outlet of the reaction tube 3 is more than 15 ℃; by adopting the structure provided by the utility model, the temperature difference between the inlet and the outlet of the reaction tube 3 is less than 5 ℃ under the condition of adopting the same medium and the same total flow, thereby effectively ensuring the accurate control of the reaction temperature.
Claims (4)
1. A double-helix heat exchange reactor comprises a reaction cylinder body (1), wherein the upper end of the reaction cylinder body (1) is provided with a reaction material inlet (5) and an upper tube plate (2), and the bottom end of the reaction cylinder body is provided with a lower tube plate (12) and a reaction material outlet (6); a reaction tube (3) is vertically arranged between the upper tube plate (2) and the lower tube plate (12) in the reaction cylinder body (1), and a catalyst is filled in the reaction tube (3); the method is characterized in that: a double-spiral heat exchange partition plate (4) is further arranged in the reaction barrel body (1), the top end of the double-spiral heat exchange partition plate (4) is connected with the upper tube plate (2), the bottom end of the double-spiral heat exchange partition plate is connected with the lower tube plate (12), the periphery of the double-spiral heat exchange partition plate is connected with the inner wall of the reaction barrel body (1), and the reaction tubes (3) penetrate through the double-spiral heat exchange partition plate (4); two ends of each spiral heat exchange partition plate are respectively provided with a heat exchange medium inlet and a heat exchange medium outlet, and the two heat exchange medium inlets are not arranged at the upper tube plate (2)/the lower tube plate (12) at the same time.
2. The double spiral heat exchange reactor of claim 1, wherein: the double-spiral heat exchange partition plates (4) comprise odd layers of spiral heat exchange partition plates and even layers of spiral heat exchange partition plates, heat exchange medium inlets (7) of the odd layers of spiral heat exchange partition plates are arranged at the upper tube plate (2), and heat exchange medium outlets (10) of the odd layers of spiral heat exchange partition plates are arranged at the lower tube plate (12); the heat exchange medium inlets (8) of the spiral heat exchange clapboards at the even layers are arranged at the lower tube plate (12), and the heat exchange medium outlets (9) of the spiral heat exchange clapboards at the even layers are arranged at the upper tube plate (2).
3. The double spiral heat exchange reactor of claim 2, wherein: the distance between the spiral layers in the double-spiral heat exchange partition plate (4) is 1/10-1/2 of the inner diameter of the reaction cylinder body (1).
4. The double spiral heat exchange reactor of claim 3, wherein: the reaction device is characterized by further comprising a transverse plate (11) arranged on each spiral layer in the double-spiral heat exchange partition plate (4), wherein the transverse plate (11) is in a sawtooth shape, the height of the transverse plate is 5-20mm, and the transverse plate deflects to a perpendicular bisector of the reaction cylinder body (1) by an angle a which is 5-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122564542.XU CN216260661U (en) | 2021-10-25 | 2021-10-25 | Double-helix heat exchange reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122564542.XU CN216260661U (en) | 2021-10-25 | 2021-10-25 | Double-helix heat exchange reactor |
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| Publication Number | Publication Date |
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| CN216260661U true CN216260661U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122564542.XU Active CN216260661U (en) | 2021-10-25 | 2021-10-25 | Double-helix heat exchange reactor |
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| CN (1) | CN216260661U (en) |
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2021
- 2021-10-25 CN CN202122564542.XU patent/CN216260661U/en active Active
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