CN216935946U - Tube still fixed bed reactor - Google Patents
Tube still fixed bed reactor Download PDFInfo
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- CN216935946U CN216935946U CN202220659067.6U CN202220659067U CN216935946U CN 216935946 U CN216935946 U CN 216935946U CN 202220659067 U CN202220659067 U CN 202220659067U CN 216935946 U CN216935946 U CN 216935946U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Abstract
The utility model belongs to a fixed bed reactor and discloses a tubular fixed bed reactor which comprises a reactor cylinder, a spiral baffle plate, a reaction tube and a heat exchange tube capable of exchanging heat for the reaction tube, wherein the spiral baffle plate is arranged inside the heat exchange tube 4, the reactor cylinder is provided with a feed inlet, a discharge outlet, a heat exchange inlet and a heat exchange outlet, the feed inlet is arranged above the discharge outlet, the heat exchange inlet is arranged below the heat exchange outlet, a feed channel is formed between the feed inlet and the inlet of the reaction tube, a discharge channel is formed between the outlet of the reaction tube and the discharge outlet, a heat exchange medium inlet channel is formed between the inlet of the heat exchange tube and the heat exchange inlet, and a heat exchange medium discharge channel is formed between the outlet of the heat exchange tube and the heat exchange outlet. The reactor disclosed by the utility model can effectively improve the conversion rate of reactants, reduce the vibration of the reaction tube and increase the heat exchange efficiency of the reactor.
Description
Technical Field
The utility model relates to a fixed bed reactor, in particular to a tube array type fixed bed reactor.
Background
At present, the process for synthesizing vinyl acetate by using acetylene as a raw material has two modes of a fixed bed and a fluidized bed (fluidized bed), although the fluidized bed can increase the contact area and the heat transfer area between two phases and has the characteristics of high mass transfer rate and the like, the severe back mixing of solid particles and fluid is caused due to the severe movement of catalyst particles, so that the concentration of reactants is reduced, the conversion rate is reduced, the catalyst breakage rate is increased due to the severe movement of the catalyst particles, and the loss of the catalyst is increased. Meanwhile, the catalyst can also collide with the wall of the device violently, so that the device and the pipeline are easily corroded, and the loss of the device is increased.
The fixed bed has fixed catalyst grains, less back mixing, high reactant concentration and fast reaction rate, and may be used in overcoming the demerits of the fluidized bed. However, most of the baffle plates adopted in the tubular fixed bed reactor in the prior art are bow-shaped baffle plates, the shell side heat supply coefficient can be improved by means of multiple tortuous flows of fluid, but the flow resistance is increased, local flow dead angles and axial backflow exist, bypass flow and short-circuit flow are serious, the heat transfer performance is reduced, the fluid washes the tube bundle at high speed in a cross flow manner, the induced vibration and damage of the tube are caused, and the problems are particularly prominent along with the increase of the diameter and the production capacity.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a tubular fixed bed reactor, which can effectively improve the conversion rate of reactants, reduce the vibration of a reaction tube and increase the heat exchange efficiency of the reactor.
In order to solve the technical problem, the utility model provides a tube-type fixed bed reactor which comprises a reactor barrel, a spiral baffle plate, a reaction tube and a heat exchange tube capable of exchanging heat for the reaction tube, wherein the spiral baffle plate is arranged inside the heat exchange tube, the reactor barrel is provided with a feed inlet, a discharge outlet, a heat exchange inlet and a heat exchange outlet, the feed inlet is arranged above the discharge outlet, the heat exchange inlet is arranged below the heat exchange outlet, a feed channel is formed between the feed inlet and the inlet of the reaction tube, a discharge channel is formed between the outlet of the reaction tube and the discharge outlet, a heat exchange medium inlet channel is formed between the inlet of the heat exchange tube and the heat exchange inlet, and a heat exchange medium discharge channel is formed between the outlet of the heat exchange tube and the heat exchange outlet.
Preferably, the heat exchange tube is a coiled tube coiled outside the reaction tube, and a heat exchange medium channel is formed between the heat exchange tube and the reaction tube.
Preferably, an upper tube plate and a lower tube plate are arranged in the reactor barrel, the upper tube plate is arranged below the feed inlet, the lower tube plate is arranged above the discharge outlet, one end of the reaction tube is connected with the upper tube plate, and the other end of the reaction tube is connected with the lower tube plate.
Further preferably, the top end of the reaction tube is provided with a protective agent layer, and the tail end of the reaction tube is provided with a grid and a support structure.
Preferably, the reaction tube is provided with a plurality of tubes.
Further preferably, a plurality of the reaction tubes are vertically arranged and arranged in a triangle.
Preferably, the heat exchange inlet is arranged between the lower tube plate and the discharge hole, and the heat exchange outlet is arranged between the upper tube plate and the feed hole.
Preferably, a liquid distributor is arranged in the reactor barrel, and the liquid distributor is arranged below the feeding hole.
Preferably, an insulating layer is arranged on the inner wall surface of the reactor cylinder.
Preferably, a visible window is arranged on the reactor barrel.
According to the tube array type fixed bed reactor, the feed inlet and the discharge outlet are formed in the reactor barrel, and the discharge outlet is formed below the feed inlet, so that reacted materials can be discharged from the reactor in real time, the reaction is promoted, and the reaction efficiency is improved. And the arrangement of the spiral baffle plate can lead the heat exchange medium to pass between the reaction tubes in a spiral shape, eliminate the additional flow resistance caused by the sudden change of the flow direction and the separation of the boundary layer when the heat exchange medium leaves the baffle plate, lighten the vibration of the reaction tubes, reduce the bypass flow and the axial backflow, eliminate dead angles, and properly keep the axial component for scouring the reaction tubes, thereby having higher heat transfer coefficient and heat exchange efficiency and lightening the local scaling tendency of the spiral baffle plate.
Further advantages of the present invention, as well as the technical effects of preferred embodiments, are further described in the following detailed description.
Drawings
FIG. 1 is a schematic structural view of a shell and tube type fixed bed reactor according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a reaction tube in a shell and tube fixed bed reactor according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a reaction tube in a shell and tube fixed bed reactor according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an arrangement of reaction tubes in a tubular fixed bed reactor according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a liquid distributor in a shell and tube fixed bed reactor according to an embodiment of the present invention.
Description of the reference numerals
1 reactor barrel 2 spiral baffle
3 reaction tube 4 heat exchange tube
5 upper pipe plate and 6 lower pipe plate
7 liquid distributor 8 visualization window
11 inlet and 12 outlet
13 heat exchange inlet and 14 heat exchange outlet
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that the terms "upper," "lower," "front," "back," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus are not to be considered limiting of the present invention.
In a basic embodiment of the present invention, as shown in fig. 1, a tubular fixed bed reactor is provided, which includes a reactor barrel 1, a spiral baffle plate 2, a reaction tube 3, and a heat exchange tube 4 capable of exchanging heat with respect to the reaction tube 3, wherein the spiral baffle plate 2 is disposed inside the heat exchange tube 4, the reactor barrel 1 is provided with a feed inlet 11, a discharge outlet 12, a heat exchange inlet 13, and a heat exchange outlet 14, the feed inlet 11 is disposed above the discharge outlet 12, the heat exchange inlet 13 is disposed below the heat exchange outlet 14, a feed channel is formed between the feed inlet 11 and the inlet of the reaction tube 3, a discharge channel is formed between the outlet of the reaction tube 3 and the discharge outlet 12, a heat exchange medium inlet channel is formed between the inlet of the heat exchange tube 4 and the heat exchange inlet 13, and a heat exchange medium outlet channel is formed between the outlet of the heat exchange tube 4 and the heat exchange outlet 14.
According to the utility model, the feed inlet 11 and the inlet of the reaction tube 3 can be connected by a pipeline or by other means; the outlet of the reaction tube 3 and the discharge port 12 may be connected by a pipe or a hopper. The inlet of the heat exchange tube 4 is connected with the heat exchange inlet 13, and the outlet of the heat exchange tube 4 is connected with the heat exchange outlet 14 through pipelines. The heat exchange medium for heat exchange can be a conventional heat exchange medium, and preferably, in order to improve the heat exchange effect and reduce the heat exchange cost, the heat exchange medium is water.
The spiral baffle plate 2 is arranged in the heat exchange tube 4, and the spiral direction of the spiral baffle plate 2 is consistent with the axial direction of the heat exchange tube 4, namely the axis of the spiral baffle plate 2 is parallel to the axis of the heat exchange tube 4.
Specifically, the reaction tube 3 is filled with catalyst particles, the catalyst is a catalyst conventionally used for preparing vinyl acetate by reacting acetylene and ethanol, and the filling density of the catalyst can be determined by those skilled in the art according to actual conditions, and is preferably 600-3Under the condition of the packing density, the catalytic performance of the catalyst can be utilized to a large extent.
Specifically, in order to guarantee the stability of the whole reactor, the bottom of the reactor cylinder 1 is connected with a skirt, the connection mode of the reactor cylinder 1 and the skirt is butt welding, and a full penetration continuous welding seam is adopted. The inner diameter of the skirt barrel body is consistent with the diameter of the reactor barrel 1. The skirt is fixed on the ground through foundation bolts.
When the tubular fixed bed reactor provided by the above basic embodiment of the present invention is in operation, the materials (acetylene and ethanol) are mixed and injected from the inlet of the reactor barrel 1, and enter the reaction tube 3 through the inlet channel, after being catalyzed by the catalyst in the reaction tube 3, most of the acetylene and ethanol react to generate vinyl acetate, and the remaining reactants enter the outlet channel from the outlet of the reaction tube 3, and are finally discharged from the outlet 12. In the reaction process, the cooling medium enters the heat exchange medium inlet channel from the heat exchange inlet 13, exchanges heat with the reaction tubes 3 in the heat exchange tubes 4 to reduce the temperature of the reaction tubes 3, and is finally discharged through the heat exchange outlet 14. In the process, the spiral baffle plate 2 is adopted, the heat exchange medium flows in the heat exchange tube 4 in a spiral shape, the additional flow resistance caused by sudden change of the flow direction and separation of a boundary layer when leaving the baffle plate is eliminated, the vibration of the tube bundle is reduced, the bypass flow and the axial backflow are reduced, the dead angle is eliminated, the axial component of the tube bundle scouring is properly kept, and therefore the heat exchanger has higher heat transfer coefficient and heat exchanger efficiency, and the local scaling tendency of a shell pass is also reduced.
In the tubular fixed bed reactor provided by the above basic embodiment of the present invention, the reactor barrel 1 is provided with the feed port 11 and the discharge port 12, and the discharge port 12 is disposed below the feed port 11, so that the reacted material can be discharged from the reactor in real time, the reaction is promoted, and the reaction efficiency is improved. And the arrangement of the spiral baffle plate 2 can lead the heat exchange medium to spirally pass between the reaction tubes 3, eliminate the additional flow resistance caused by the sudden change of the flow direction and the separation of the boundary layer when leaving the baffle plate, lighten the vibration of the reaction tubes 3, reduce the bypass flow and the axial backflow, eliminate dead angles, and properly keep the axial component for scouring the reaction tubes 3, thereby having higher heat transfer coefficient and heat exchange efficiency and lightening the local scaling tendency of the spiral baffle plate 2.
The heat exchange tube 4 may be a commonly used heat exchange tube, and specifically, the heat exchange tube 4 may be sleeved outside the reaction tube 3, or may be coiled outside the reaction tube 3. Referring to fig. 2 and 3 as an embodiment of the present invention, the heat exchange tube 4 is a coiled tube coiled outside the reaction tube 3, and a heat exchange medium channel is formed between the heat exchange tube 4 and the reaction tube 3.
Specifically, one side of the heat exchange tube 4 close to the reaction tube 3 is provided with an opening so that a heat exchange medium in the heat exchange tube 4 is directly contacted with the reaction tube 3, thereby further improving the heat exchange effect of the heat exchange medium in the heat exchange tube 4 on the reaction tube 3, solving the problem of large temperature gradient in the reaction tube 3, enabling the temperature distribution in the reaction tube to be uniform, not only ensuring the conversion rate and reaction time of materials, but also meeting the heat transfer and reactant corrosion requirements of the materials and the reaction, and reducing the level of side reaction in the reaction process. In order to ensure the heat exchange effect between the heat exchange tube 4 and the reaction tube 3, the opening of the heat exchange tube 4 is welded with the reaction tube 3.
More specifically, the spiral baffle plate 2 is matched with the reaction tube 3 in structure, that is, the spiral angle of the spiral baffle plate 2 is consistent with that of the heat exchange tube 4, in the using process, the spiral baffle plate 2 is coiled outside the reaction tube 3, and the heat exchange tube 4 is sleeved outside the spiral baffle plate 2 and is coiled outside the reaction tube 3.
The reaction tube 3 can be fixed in the reactor barrel 1 by any feasible way, as a specific embodiment of the utility model, an upper tube plate 5 and a lower tube plate 6 are arranged in the reactor barrel 1, the upper tube plate 5 is arranged below the feed inlet 11, the lower tube plate 6 is arranged above the discharge outlet 12, one end of the reaction tube 3 is connected with the upper tube plate 5, and the other end is connected with the lower tube plate 6.
Specifically, the upper tube plate 5 and the lower tube plate 6 are both provided with sieve holes suitable for materials to pass through, and preferably, the positions of the sieve holes correspond to the inlet and the outlet of the reaction tube 3. The reaction tube 3 can be better fixed by arranging the lower tube plate 6 of the upper tube plate 5, so that the vibration of the reaction tube 3 in the reaction process is reduced, and the structure is simple. The reaction tube 3 is welded and fixed between the upper tube plate 5 and the lower tube plate 6.
More specifically, the reactor barrel 1 is provided with a stress relief groove suitable for the clamping of the upper tube plate 5 and the lower tube plate 6, so that the stress concentration at the edges of the upper tube plate 5 and the lower tube plate 6 can be reduced on the premise of not increasing the thickness of the upper tube plate 5 and the lower tube plate 6, and the strength of the whole reactor is improved. The thickness of the upper tube plate 5 and the lower tube plate 6 is set to 40-50 mm.
In one embodiment of the present invention, the top end of the reaction tube 3 is provided with a protective agent layer, and the tail end of the reaction tube 3 is provided with a grid and a support structure. The protective agent used in the protective agent layer is an FBN protective agent, has the characteristics of strong raw material adaptability, strong device adaptability, strong process adaptability and the like, is favorable for improving the impurity interception and scale dissolution capacities, reducing the pressure drop of a reactor bed layer, slowing down the rising rate of the pressure drop of a reaction device, prolonging the operation period of the reaction device and reducing the operation cost of the reaction device. The support structure may be a support structure as disclosed in the prior art, such as a support spring that can be used for support. Set up the grid at 3 tail ends of reaction tube and can reduce the condition that the catalyst in reaction tube 3 flows out from reaction tube 3 along with the material in the reaction process to can guarantee going on smoothly of whole reaction.
Preferably, the protective agent layer is arranged between the reaction tubes 3 and the upper tube plate 5, and the grid and the support structure are arranged between the reaction tubes 3 and the lower tube plate 6.
According to the present invention, the reaction tube 3 is provided in plural. The multiple reaction tubes 3 can be dispersedly provided with the catalyst, so that the contact area of the materials and the catalyst is increased, and the reaction efficiency of the whole reaction is improved. The inner diameter and number of the reaction tubes 3 can be determined by those skilled in the art as the case may be. As a specific embodiment of the present invention, the inner diameter of the reaction tube 3 is 20 to 50 mm. The reactor tube 3 preferably has a size of 45X 2.5mm and is a molybdenum-containing chromium-nickel alloy, and more preferably a 316L-type molybdenum-containing chromium-nickel alloy. The number of reaction tubes 3 should satisfy the diameter of the catalyst bed, and thus 700 reaction tubes 3 are required. Preferably, as shown in fig. 4, the plurality of reaction tubes 3 are vertically arranged and arranged in a triangular shape.
In one embodiment of the utility model, the heat exchange inlet 13 is disposed between the lower tube sheet 6 and the discharge port 12, and the heat exchange outlet 14 is disposed between the upper tube sheet 5 and the feed port 11. The arrangement can exchange heat for the whole reaction tube 3, achieves a good heat exchange effect, can reduce pipelines between the heat exchange tube 4 and the heat exchange inlet 13 and between the heat exchange tube 4 and the heat exchange outlet 14, and reduces heat exchange cost. From the viewpoint of further cost reduction, it is preferable that the heat exchange inlet 13 is provided at the mounting position of the lower tube plate 6 in the reactor barrel 1 and the heat exchange outlet 14 is provided at the mounting position of the upper tube plate 5 in the reactor barrel 1.
In one embodiment of the utility model, a liquid distributor 7 is arranged in the reactor barrel 1, the liquid distributor 7 being arranged below the feed opening 11. In particular, the liquid distributor 7 may or may not be connected to the feed port 11, and preferably is connected to the feed port 11. The structure of the liquid distributor 7 is shown in fig. 5. The liquid distributor 7 plays a role in dispersing the liquid flow in the feed port 11 along the radial direction of the reactor, and the liquid distribution is uneven, which affects the conversion rate and the selectivity, so that the reaction is difficult to carry out. The liquid distributor 7 is arranged at the feed inlet 11 of the tubular reactor, so that the problem of uneven liquid quantity distributed to each reaction tube 3 by the liquid feed of the tubular reactor is solved. One end of the liquid distributor 7 is connected with the feed inlet 11 of the reactor through a flange, so that the disassembly is convenient, and the filling and the equipment maintenance of the catalyst in the reactor are convenient.
In one embodiment of the present invention, the inner wall surface of the reactor barrel 1 is provided with a heat insulating layer. The arrangement of the heat insulation layer can prevent unnecessary damage caused by overhigh temperature outside the reactor barrel 1. Specifically, the heat-insulating layer can be made of any material capable of achieving the heat-insulating effect, such as asbestos, cotton, rock wool and the like. From the viewpoint of further improving the heat preservation effect, the heat preservation layer is preferably a rock wool layer. The thickness of the heat-insulating layer is 50-70 mm.
In one embodiment of the utility model, the reactor barrel 1 is provided with a viewing window 8. The condition inside the reactor tube 1 can be observed at any time. Preferably, two visual windows 8 can be arranged, wherein one visual window 8 is arranged on the reactor barrel 1 between the inlet of the reaction tube 3 and the feed inlet 11, and the other visual window 8 is arranged between the outlet of the reaction tube 3 and the discharge outlet 12, so that the condition before the reaction of the materials in the reactor barrel 1 can be observed at any time, and the condition after the reaction of the materials in the reactor barrel 1 can be observed at any time.
In a relatively preferred embodiment of the present invention, referring to fig. 1-4, a tubular fixed bed reactor is provided, comprising a reactor barrel 1, a spiral baffle plate 2, a plurality of reaction tubes 3 and heat exchange tubes 4 capable of exchanging heat with the reaction tubes 3, wherein the reaction tubes 3 are provided with a protective agent layer at the top ends thereof, the tail ends of the reaction tubes 3 are provided with grids and support structures, the heat exchange tubes 4 are coiled tubes coiled outside the reaction tubes 3, a heat exchange medium channel is formed between the heat exchange tubes 4 and the reaction tubes 3, the spiral baffle plate 2 is coiled outside the reaction tubes 3 and is arranged inside the heat exchange tubes 4, the reactor barrel 1 is provided with a feed inlet 11, a discharge outlet 12, a heat exchange inlet 13 and a heat exchange outlet 14, the feed inlet 11 is arranged above the discharge outlet 12, the heat exchange inlet 13 is arranged below the heat exchange outlet 14, the heat exchange inlet 13 is arranged at the installation position of the lower tube plate 6 in the reactor barrel 1, the reactor comprises a reactor barrel 1, a heat exchange outlet 14, a feeding channel, a discharging channel, a heat exchange medium inlet channel, a heat exchange medium outlet channel, a heat exchange medium discharging channel, a liquid distributor 7, a heat insulation layer and a visible window 8, wherein the heat exchange outlet 14 is arranged at the installation position of an upper tube plate 5 in the reactor barrel 1, the feeding channel is formed between the inlet of the feeding port 11 and the inlet of the reaction tube 3, the discharging channel is formed between the outlet of the reaction tube 3 and the heat exchange inlet 13, the heat exchange medium discharging channel is formed between the outlet of the heat exchange tube 4 and the heat exchange outlet 14, the upper tube plate 5 and a lower tube plate 6 are arranged in the reactor barrel 1, the upper tube plate 5 is arranged below the feeding port 11, the lower tube plate 6 is arranged above the discharging port 12, one end of the reaction tube 3 is connected with the upper tube plate 5, the other end of the reaction tube 3 is connected with the lower tube plate 6, the liquid distributor 7 is arranged in the reactor barrel 1, the liquid distributor 7 is arranged below the feeding port 11, the inner wall surface of the reactor barrel 1 is provided with the heat insulation layer, and the visible window 8 is arranged on the reactor barrel 1.
When the tubular fixed bed reactor provided by the preferred embodiment works, materials (acetylene and ethanol) are mixed and injected from the feed inlet of the reactor barrel 1, dispersed in the feed channel through the liquid distributor 7, and then enter the reaction tube 3, after being catalyzed by the catalyst in the reaction tube 3, most of acetylene and ethanol react to generate vinyl acetate, and the vinyl acetate and the residual reactants enter the discharge channel from the outlet of the reaction tube 3, and finally are discharged from the discharge port 12. In the reaction process, the cooling medium enters the heat exchange medium inlet channel from the heat exchange inlet 13, exchanges heat with the reaction tubes 3 in the heat exchange tubes 4 to reduce the temperature of the reaction tubes 3, and is finally discharged through the heat exchange outlet 14.
According to the tubular fixed bed reactor provided by the preferred embodiment, the reactor barrel 1 is provided with the feeding hole 11 and the discharging hole 12, and the discharging hole 12 is arranged below the feeding hole 11, so that the reacted materials can be discharged from the reactor in real time, the chemical balance is broken, the reaction is promoted, and the reaction efficiency is improved. And the arrangement of the spiral baffle plate 2 can lead the heat exchange medium to spirally pass between the reaction tubes 3, eliminate the additional flow resistance caused by the sudden change of the flow direction and the separation of the boundary layer when leaving the baffle plate, lighten the vibration of the reaction tubes 3, reduce the bypass flow and the axial backflow, eliminate dead angles, and properly keep the axial component for scouring the reaction tubes 3, thereby having higher heat transfer coefficient and heat exchange efficiency and lightening the local scaling tendency of the spiral baffle plate 2. Experiments prove that the reaction conversion rate in the reactor can be improved to 99 percent, the conversion rate is further improved, raw materials are saved, and the manufacturing cost is saved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A tube-type fixed bed reactor is characterized by comprising a reactor cylinder (1), a spiral baffle plate (2), a reaction tube (3) and a heat exchange tube (4) capable of exchanging heat for the reaction tube (3), wherein the spiral baffle plate (2) is arranged inside the heat exchange tube (4), the reactor cylinder (1) is provided with a feed inlet (11), a discharge outlet (12), a heat exchange inlet (13) and a heat exchange outlet (14), the feed inlet (11) is arranged above the discharge outlet (12), the heat exchange inlet (13) is arranged below the heat exchange outlet (14), a feed channel is formed between the feed inlet (11) and the inlet of the reaction tube (3), a discharge channel is formed between the outlet of the reaction tube (3) and the discharge outlet (12), and a heat exchange medium inlet channel is formed between the inlet of the heat exchange tube (4) and the heat exchange inlet (13), a heat exchange medium discharge channel is formed between the outlet of the heat exchange tube (4) and the heat exchange outlet (14).
2. The shell and tube fixed bed reactor according to claim 1, characterized in that the heat exchange tubes (4) are coiled tubes coiled outside the reaction tubes (3), and a heat exchange medium channel is formed between the heat exchange tubes (4) and the reaction tubes (3).
3. The shell-and-tube fixed bed reactor according to claim 1 or 2, characterized in that an upper tube plate (5) and a lower tube plate (6) are arranged in the reactor tube (1), the upper tube plate (5) on the upper tube plate (5) is arranged below the feed inlet (11), the lower tube plate (6) is arranged above the discharge outlet (12), one end of the reaction tube (3) is connected with the upper tube plate (5), and the other end is connected with the lower tube plate (6).
4. The tubular fixed bed reactor according to claim 3, characterized in that the top end of the reaction tube (3) is provided with a protective agent layer and the tail end of the reaction tube (3) is provided with a grid and a support structure.
5. The tubular fixed bed reactor according to claim 3, characterized in that the reaction tubes (3) are provided with a plurality of tubes.
6. The tubular fixed bed reactor according to claim 5, characterized in that a plurality of said reaction tubes (3) are arranged vertically and in a triangular arrangement.
7. The shell-and-tube fixed bed reactor according to claim 3, characterized in that the heat exchange inlet (13) is arranged between the lower tube sheet (6) and the outlet port (12), and the heat exchange outlet (14) is arranged between the upper tube sheet (5) and the inlet port (11).
8. Tubular fixed bed reactor according to claim 1 or 2, characterized in that a liquid distributor (7) is arranged in the reactor tube (1), the liquid distributor (7) being arranged below the feed opening (11).
9. The tubular fixed bed reactor according to claim 1 or 2, characterized in that the inner wall surface of the reactor barrel (1) is provided with a heat insulating layer.
10. Tubular fixed bed reactor according to claim 1 or 2, characterized in that the reactor tube (1) is provided with a viewing window (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220659067.6U CN216935946U (en) | 2022-03-23 | 2022-03-23 | Tube still fixed bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220659067.6U CN216935946U (en) | 2022-03-23 | 2022-03-23 | Tube still fixed bed reactor |
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| Publication Number | Publication Date |
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| CN216935946U true CN216935946U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220659067.6U Active CN216935946U (en) | 2022-03-23 | 2022-03-23 | Tube still fixed bed reactor |
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| CN (1) | CN216935946U (en) |
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- 2022-03-23 CN CN202220659067.6U patent/CN216935946U/en active Active
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