CN218307846U - Tubular reactor with variable volume - Google Patents
Tubular reactor with variable volume Download PDFInfo
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- CN218307846U CN218307846U CN202222632885.XU CN202222632885U CN218307846U CN 218307846 U CN218307846 U CN 218307846U CN 202222632885 U CN202222632885 U CN 202222632885U CN 218307846 U CN218307846 U CN 218307846U
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Abstract
The utility model relates to a tubular reactor field of fixed bed reaction discloses a tubular reactor of variable volume, include the reaction tube and set up in the inside catalyst bed of reaction tube and set up in the sealed lid at reaction tube both ends, the catalyst bed is provided with the catalyst in situ, its the inside of reaction tube is provided with the sieve that can follow reaction tube length direction and remove, the sieve separates into deformation zone and the catalytic zone who is used for installing the catalyst bed with reaction tube inner space, the volume in deformation zone can increase or reduce along with catalyst volume change. The utility model discloses a tubular reactor of variable volume can adapt to the volume change of catalyst automatically to overcome the fixed problem of catalyst in the reaction tube among the prior art.
Description
Technical Field
The utility model relates to a tubular reactor field of fixed bed reaction especially relates to a tubular reactor of variable volume.
Background
Methyl 3-mercaptopropionate is an important raw material for producing industrial bactericides, and the most competitive production process at present takes methyl acrylate and hydrogen sulfide as raw materials to continuously prepare the methyl 3-mercaptopropionate. The continuous process needs to use a tubular reactor, and in the reaction process, the catalyst in the bed layer of the tubular reactor is influenced by factors such as reaction temperature, pressure, solvent and the like, and the volume of the catalyst is easy to expand or contract; if the bed volume of the tubular reactor is fixed and unchanged, catalyst particles are easy to be extruded and crushed during expansion; when the catalyst shrinks, gaps among catalyst particles become large, so that the catalyst cannot be fixed in a bed layer of the reactor, and the reaction effect of the catalyst is influenced.
Therefore, under the condition of not changing the amount of the catalyst and the space size of the tubular reactor, a tubular reactor with a variable volume is urgently needed to be provided, so that the problems of volume change of the catalyst and inadaptation of the reactor in the continuous reaction process are solved, and the catalyst is fixed in the reaction tube in the continuous reaction process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a tubular reactor of variable volume can adapt to the volume change of catalyst automatically to overcome the fixed problem of catalyst in the reaction tube among the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a tubular reactor of variable volume, includes the reaction tube and sets up in the inside catalyst bed of reaction tube and set up in the sealed lid at reaction tube both ends, be provided with the catalyst in the catalyst bed, its the inside of reaction tube is provided with can follow the sieve that reaction tube length direction removed, the sieve separates reaction tube inner space into deformation zone and the catalytic zone who is used for installing the catalyst bed, the volume in deformation zone can increase or reduce along with catalyst volume change.
Furthermore, an upper fixing plate and a lower fixing plate are respectively arranged at two ends of the reaction tube, the upper fixing plate, the sieve plate and the lower fixing plate are sequentially arranged along the flowing direction of reaction liquid, the catalyst bed layer is arranged between the sieve plate and the lower fixing plate, and the sieve plate can move to one side close to or far away from the lower fixing plate along with the volume change of the catalyst; and the upper fixing plate, the sieve plate and the lower fixing plate are respectively provided with a plurality of pore channels for reaction liquid to pass through.
Further, the inner diameter of the pore passage is gradually reduced along the flowing direction of the reaction liquid.
Furthermore, a compression spring is fixedly arranged between the upper fixing plate and the sieve plate.
Furthermore, a slide rod is arranged in the reaction tube, one end of the slide rod is fixedly connected with the upper fixing plate, and the other end of the slide rod penetrates through the catalyst bed layer and the sieve plate and is fixedly connected with the lower fixing plate.
Furthermore, a groove is formed in the center of the upper fixing plate, and the end of the sliding rod is inserted into the groove.
Furthermore, a jacket is arranged outside the reaction tube, and a constant temperature cavity for containing circulating liquid is defined by the jacket and the outer wall of the reaction tube.
Further, a heater is arranged outside the reaction tube, a circulating liquid outlet and a circulating liquid inlet are formed in the jacket, the circulating liquid outlet is formed in one side close to the liquid inlet end of the reaction tube, and the circulating liquid outlet and the circulating liquid inlet are connected with the heater.
The utility model discloses a tubular reactor of variable volume's beneficial effect:
firstly, the volume of the deformation zone can expand or contract along with the volume change of the catalyst, so that the volume of a bed layer of the reactor is adjusted, the extrusion damage of the catalyst or the floating of catalyst particles caused by the volume change of the catalyst is avoided, and the influence of the conditions on the reaction is avoided;
secondly, through set up the pore on the sieve, can make the reaction liquid that flows through more even distribution, play the effect of distributor to improve the equilibrium that the reaction liquid distributes, thereby promote the reaction quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a cross-sectional view of a variable volume tubular reactor of the present disclosure;
FIG. 2 is a schematic structural diagram of an upper fixing plate in a tubular reactor with variable volume according to the present invention;
fig. 3 is a schematic structural diagram of a lower fixing plate in a tubular reactor with variable volume disclosed by the present invention.
In the figure: 1. a reaction tube; 11. a sealing cover; 2. a catalyst bed layer; 31. a feed line; 32. a discharge line; 4. an upper fixing plate; 41. a groove; 5. a sieve plate; 51. a duct; 6. a lower fixing plate; 7. a compression spring; 8. a slide rod; 9. a jacket; 91. a constant temperature cavity; 92. a circulating liquid outlet; 93. and a circulating liquid inlet.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3 of the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a tubular reactor with variable volume comprises a tubular reaction tube 1 with two open ends, a catalyst bed layer 2 filled with catalyst and arranged in the reaction tube 1, and two sealing covers 11 arranged at two ends of the reaction tube 1, wherein the two sealing covers 11 are respectively and fixedly connected with the reaction tube 1 through flanges, so that the whole reaction system achieves a sealing effect. The center of two sealed lids 11 is seted up the material mouth respectively, and one of them material mouth is connected with feed line 31, and another material mouth is connected with discharging line 32, and reaction liquid passes through feed line 31 and gets into inside reaction tube 1 to flow out through discharging line 32 behind catalyst bed 2.
Referring to fig. 1, an upper fixing plate 4, a sieve plate 5 and a lower fixing plate 6 are sequentially arranged in a reaction tube 1 along the flowing direction of a reaction liquid, wherein the upper fixing plate 4 and the lower fixing plate 6 are respectively sealed at openings at two ends of the reaction tube 1, the sieve plate 5 is abutted against one side of a catalyst bed layer 2 close to the upper fixing plate 4, and the sieve plate 5 can move along the length direction of the reaction tube 1 along with the change of the catalyst volume. The sieve plate 5 divides the inner space of the reaction tube 1 into a deformation area and a catalytic area for installing the catalyst bed layer 2, and the volume of the deformation area can be increased or reduced along with the volume change of the catalyst.
Referring to fig. 1, fig. 2 and fig. 3, a plurality of channels 51 for reaction liquid to pass through are respectively formed on the upper fixing plate 4, the sieve plate 5 and the lower fixing plate 6, the channels 51 are uniformly distributed, and the channels 51 are uniformly distributed on the upper fixing plate 4, so that the arrangement of the upper fixing plate 4 does not hinder the reaction liquid from entering the reaction tube 1; the inner diameters of the pore channels 51 positioned on the upper fixing plate 4, the sieve plate 5 and the lower fixing plate 6 are gradually reduced, and the micro pore channels 51 are distributed on the sieve plate 5, so that the flowing reaction liquid can be more evenly distributed, the function of a distributor is achieved, the distribution balance of the reaction liquid is improved, and the reaction quality is improved; through laying tiny pore 51 on bottom plate 6 for bottom plate 6's setting does not hinder reaction liquid and gets into discharging line 32, slows down reaction liquid's outflow rate simultaneously, prolongs the contact time of reaction liquid and catalyst, increases catalyst utilization ratio.
Referring to fig. 1, a compression spring 7 is fixedly arranged between an upper fixed plate 4 and a sieve plate 5, when the catalyst in a catalyst bed layer 2 expands due to the volume influenced by the environment, the stress of the compression spring 7 is increased, the spring contracts, and the movable sieve plate 5 moves towards one side close to the upper fixed plate 4, so that the volume of the catalyst bed layer 2 is increased, and the catalyst particles are prevented from being damaged due to expansion and extrusion.
Referring to fig. 1, a slide rod 8 for keeping the upper fixing plate 4, the sieve plate 5 and the lower fixing plate 6 parallel is further disposed inside the reaction tube 1, the axis of the slide rod 8 coincides with the axis of the reaction tube 1, and the upper fixing plate 4 and the lower fixing plate 6 are respectively provided with a groove 41 for inserting the end of the slide rod 8 at the center thereof. One end of the slide rod 8 is connected with the upper fixing plate 4, and the other end of the slide rod penetrates through the sieve plate 5 and the catalyst bed layer 2 in sequence and then is connected with the lower fixing plate 6, so that the sieve plate 5 is kept parallel to the upper fixing plate and the lower fixing plate, the catalyst bed layer 2 is further kept stable, and the flowing reaction liquid is uniformly distributed in the catalyst bed layer 2 to increase the utilization rate of the catalyst.
Referring to fig. 1, a jacket 9 is sleeved outside a reaction tube 1, and the jacket 9 and the outer wall of the reaction tube 1 enclose a thermostatic chamber 91 for containing a circulating liquid. The jacket 9 is provided with a circulating liquid outlet 92 and a circulating liquid inlet 93, wherein the circulating liquid outlet 92 is arranged on one side close to the liquid inlet end of the reaction tube 1, a heater (not shown in the figure of the heater) is arranged outside the reaction tube 1, the circulating liquid outlet 92 is connected with the inlet of the heater, and the circulating liquid inlet 93 is connected with the outlet of the heater, so that the influence of the external environment on the internal reaction environment of the reaction tube 1 is reduced, and the stability of the whole reaction system is improved.
The application has the implementation principle that: the position of the sieve plate 5 is controlled through the compression spring 7, so that the volume of a reactor bed layer is adjusted, when the volume of the catalyst in the catalyst bed layer 2 is changed, the compression spring 7 can change the volume of the catalyst bed layer 2 according to stress, the phenomenon that the catalyst is extruded and damaged or catalyst particles float due to the change of the volume of the catalyst is avoided, and the influence of the conditions on the reaction is avoided. Meanwhile, the sieve plate 5 is fully distributed with the tiny pore channels 51, so that the flowing reaction liquid is more evenly distributed, and the function of a distributor is achieved, thereby improving the distribution balance of the reaction liquid and improving the reaction quality.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a tubular reactor of variable volume, includes reaction tube (1) and sets up in inside catalyst bed (2) of reaction tube (1) and sets up in sealed lid (11) at reaction tube (1) both ends, be provided with the catalyst in catalyst bed (2), its characterized in that, the inside of reaction tube (1) is provided with sieve (5) that can follow reaction tube (1) length direction and remove, sieve (5) separate into deformation zone and the catalytic zone that is used for installing catalyst bed (2) with reaction tube (1) inner space, the volume in deformation zone can increase or reduce along with catalyst volume change.
2. The tubular reactor with the variable volume according to claim 1, characterized in that the two ends of the reaction tube (1) are respectively provided with an upper fixing plate (4) and a lower fixing plate (6), the upper fixing plate (4), the sieve plate (5) and the lower fixing plate (6) are sequentially arranged along the flowing direction of the reaction liquid, the catalyst bed layer (2) is arranged between the sieve plate (5) and the lower fixing plate (6), and the sieve plate (5) can move to the side close to or far away from the lower fixing plate (6) along with the change of the volume of the catalyst; and a plurality of pore channels (51) for reaction liquid to pass through are respectively arranged on the upper fixing plate (4), the sieve plate (5) and the lower fixing plate (6).
3. A variable volume tubular reactor as claimed in claim 2, wherein the inner diameter of the channels (51) decreases in the direction of flow of the reaction liquid.
4. A variable volume tubular reactor as claimed in claim 2, wherein a compression spring (7) is fixedly arranged between the upper fixing plate (4) and the sieve plate (5).
5. The tubular reactor of claim 2, characterized in that the inside of the reaction tube (1) is provided with a slide rod (8), one end of the slide rod (8) is fixedly connected with the upper fixed plate (4), and the other end thereof penetrates through the catalyst bed (2) and the sieve plate (5) and is fixedly connected with the lower fixed plate (6).
6. A variable volume tubular reactor as claimed in claim 5, characterized in that said upper fixed plate (4) is provided with a recess (41) at its center, and the ends of said slide rods (8) are inserted inside said recess (41).
7. A variable volume tubular reactor as claimed in claim 1, wherein the outside of the reaction tube (1) is provided with a jacket (9), and the jacket (9) and the outer wall of the reaction tube (1) enclose a thermostatic chamber (91) for containing the circulating liquid.
8. The tubular reactor of claim 7, characterized in that a heater is arranged outside the reaction tube (1), and the jacket (9) is provided with a circulating liquid outlet (92) and a circulating liquid inlet (93), wherein the circulating liquid outlet (92) is arranged at a side close to the liquid inlet end of the reaction tube (1), and the circulating liquid outlet (92) and the circulating liquid inlet (93) are connected with the heater.
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CN202222632885.XU CN218307846U (en) | 2022-10-08 | 2022-10-08 | Tubular reactor with variable volume |
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CN202222632885.XU CN218307846U (en) | 2022-10-08 | 2022-10-08 | Tubular reactor with variable volume |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116571189A (en) * | 2023-07-07 | 2023-08-11 | 江苏长青农化南通有限公司 | Preparation process of 5- (2-chloro-4- (trifluoromethyl) phenoxy) -2-nitrobenzoic acid |
CN116803485A (en) * | 2023-06-13 | 2023-09-26 | 安徽恒光聚氨酯材料有限公司 | Preparation method and preparation system of continuous aminopropionitrile mixture |
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2022
- 2022-10-08 CN CN202222632885.XU patent/CN218307846U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116803485A (en) * | 2023-06-13 | 2023-09-26 | 安徽恒光聚氨酯材料有限公司 | Preparation method and preparation system of continuous aminopropionitrile mixture |
CN116803485B (en) * | 2023-06-13 | 2024-03-26 | 安徽恒光聚氨酯材料有限公司 | Preparation method and preparation system of continuous aminopropionitrile mixture |
CN116571189A (en) * | 2023-07-07 | 2023-08-11 | 江苏长青农化南通有限公司 | Preparation process of 5- (2-chloro-4- (trifluoromethyl) phenoxy) -2-nitrobenzoic acid |
CN116571189B (en) * | 2023-07-07 | 2024-04-02 | 江苏长青农化南通有限公司 | Preparation process of 5- (2-chloro-4- (trifluoromethyl) phenoxy) -2-nitrobenzoic acid |
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