CN114682171A - High-efficiency dehydrogenation or hydrogenation reactor and dehydrogenation or hydrogenation process system for organic liquid - Google Patents
High-efficiency dehydrogenation or hydrogenation reactor and dehydrogenation or hydrogenation process system for organic liquid Download PDFInfo
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- CN114682171A CN114682171A CN202210398236.XA CN202210398236A CN114682171A CN 114682171 A CN114682171 A CN 114682171A CN 202210398236 A CN202210398236 A CN 202210398236A CN 114682171 A CN114682171 A CN 114682171A
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
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Abstract
The invention relates to the field of chemical equipment, and discloses an organic liquid efficient dehydrogenation or hydrogenation reactor and a dehydrogenation or hydrogenation process system, wherein the organic liquid efficient dehydrogenation or hydrogenation reactor comprises: the reactor body, the upper end of reactor body is provided with the gas outlet, the lower extreme is provided with the liquid phase export, the middle part is provided with a plurality of reaction tubes that fill has the catalyst, the liquid adapter is connected to the lower extreme of reaction tube, be formed with the heat transfer medium cavity between a plurality of reaction tubes, the both ends of heat transfer medium cavity set up to seal, fixed insertion is provided with the circulating pipe that extends along the axial direction of reactor body in the heat transfer medium cavity, the both ends of circulating pipe set up to the opening. The organic liquid high-efficiency dehydrogenation or hydrogenation reactor can be used for both dehydrogenation reaction and hydrogenation reaction, and has the advantages of reasonable liquid phase distribution, full contact between the liquid phase and the catalyst, full reaction and low material and energy loss.
Description
Technical Field
The invention relates to the field of chemical equipment, in particular to an efficient organic liquid dehydrogenation or hydrogenation reactor and a dehydrogenation or hydrogenation process system.
Background
The dehydrogenation reaction is the reverse reaction of hydrogenation reaction, and the principle is that the hydrogen-rich organic liquid is given a certain temperature, under the action of catalyst the hydrocarbon bond is broken so as to attain the goal of dehydrogenation, and it is an endothermic reaction, and the hydrogenation reaction is opposite to dehydrogenation reaction, and at present, there are three forms of dehydrogenation reactor or hydrogenation reactor, i.e. tubular reactor, adiabatic reactor or multi-stage reactor.
The most widely used reactor at present is a tubular reactor, but the traditional tubular reactor has the following defects in the process reaction: the liquid phase enters the reaction cavity from a single tube at the bottom of the reactor to contact with the catalyst, and the arrangement of uniform distribution of the liquid phase is not provided, so that the problems of insufficient and uneven contact between the liquid phase and the catalyst exist, the reaction is insufficient, and the loss of materials and energy is caused.
Disclosure of Invention
The invention aims to solve the problems of insufficient and uneven contact between a liquid phase and a catalyst in the prior art, and provides an organic liquid high-efficiency dehydrogenation or hydrogenation reactor and a dehydrogenation or hydrogenation process system.
In order to achieve the above object, in one aspect, the present invention provides an organic liquid high efficiency dehydrogenation or hydrogenation reactor, comprising: the reactor comprises a reactor body, wherein a gas outlet is formed in the upper end of the reactor body, a liquid phase outlet is formed in the lower end of the reactor body, a plurality of reaction tubes filled with catalysts are arranged in the middle of the reactor body, the lower ends of the reaction tubes are connected with a liquid adapter, a heat exchange medium cavity is formed among the reaction tubes, two ends of the heat exchange medium cavity are sealed, a circulating tube extending along the axial direction of the reactor body is fixedly inserted into the heat exchange medium cavity, and two ends of the circulating tube are open.
Preferably, a heat exchange medium inlet and a heat exchange medium outlet which are communicated with the heat exchange medium cavity are arranged on the side face of the shell of the reactor body.
Preferably, the heat exchange medium inlet is disposed below the heat exchange medium outlet.
Preferably, a plurality of the reaction tubes are arranged around the circulation tube in an annular shape at equal intervals.
Preferably, a plurality of reaction tubes are distributed in layers along the radial direction of the reactor body, and a plurality of reaction tubes in each layer are arranged around the circulation tube at equal intervals in a circumferential direction.
Preferably, the liquid adaptor comprises: the upper end of the distribution plate is provided with a plurality of outlet pipes extending into the reaction pipe, and the lower end of the distribution plate is provided with an inlet pipeline.
Preferably, the feed line comprises: the distribution plate comprises a main pipeline and at least two branch pipelines, wherein the branch pipelines are arranged at equal intervals along the circumferential direction of the distribution plate.
Preferably, a flow valve and a pressure gauge are arranged on the inlet pipeline of the liquid adapter.
Preferably, the inner diameter of the reaction tube is 22 to 55 mm.
In a second aspect, the present invention provides a dehydrogenation or hydrogenation process system comprising: the device comprises an organic liquid high-efficiency dehydrogenation or hydrogenation reactor, a pump, a hydrogen-poor liquid storage tank, a hydrogen-rich liquid storage tank and a gas-liquid separation system; the liquid outlet of the gas-liquid separation system is connected with the hydrogen-poor liquid storage tank and the hydrogen-rich liquid storage tank, the liquid outlets of the hydrogen-poor liquid storage tank and the hydrogen-rich liquid storage tank are connected with the inlet of the liquid adapter through a pump, the gas outlet is connected with the gas inlet of the gas-liquid separation system, a hydrogen inlet pipeline is further arranged on the pipeline at the rear end of the pump, and the liquid outlet is connected with the liquid outlet pipeline of the gas-liquid separation system.
Through the technical scheme, the organic liquid high-efficiency dehydrogenation or hydrogenation reactor can be used for both dehydrogenation and hydrogenation, the liquid phase distribution is reasonable, the liquid phase is fully contacted with the catalyst, the reaction is full, and the material and energy loss is low.
Drawings
FIG. 1 is a block diagram of a preferred embodiment of a high efficiency dehydrogenation or hydrogenation reactor for organic liquids;
FIG. 2 is a schematic diagram of a preferred embodiment of a dehydrogenation or hydrogenation process system.
Description of the reference numerals
1-a reactor body; 2-a shell; 3-main pipeline; 4-a heat carrier inlet; 5-a liquid phase outlet; 6-heat carrier outlet; 7-gas outlet; 8-a reaction tube; 9-heat exchange medium cavity; 10-a liquid adapter; 11-space under the reactor; 12-a circulation pipe; 13-space above the reactor; 14-a catalyst; 15-branch pipeline; 16-an outlet pipe; 17-a pump; 18-a gas-liquid separation system; 19-a hydrogen lean liquid storage tank; 20-a hydrogen-rich liquid storage tank; 21-compressor.
Detailed Description
The following detailed description of embodiments of the invention 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 present invention, unless otherwise specified, directional words included in terms such as "upper, lower, left, right, front, rear, inner, and outer" and the like merely represent the directions of the terms in a normal use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
Referring to fig. 1, an organic liquid high efficiency dehydrogenation or hydrogenation reactor is shown, comprising: the reactor comprises a reactor body 1, wherein a gas outlet 7 is arranged at the upper end of the reactor body 1, a liquid phase outlet 5 is arranged at the lower end of the reactor body, a plurality of reaction tubes 8 filled with a catalyst 14 are arranged in the middle of the reactor body, a liquid adapter 10 is connected to the lower ends of the reaction tubes 8, a plurality of heat exchange medium cavities 9 are formed between the reaction tubes 8, two ends of each heat exchange medium cavity 9 are sealed, a circulating pipe 12 extending along the axial direction of the reactor body 1 is fixedly inserted into each heat exchange medium cavity 9, and two ends of each circulating pipe 12 are opened.
Through the implementation of the technical scheme, the organic liquid high-efficiency dehydrogenation or hydrogenation reactor can be used for both dehydrogenation reaction and hydrogenation reaction, the liquid phase distribution is reasonable, the liquid phase is fully contacted with the catalyst 14, the reaction is full, and the loss of materials and energy is low. Specifically, the liquid phase enters the liquid adapter 10 from the lower end, and is distributed to enter each reaction tube 8 to react with the catalyst 14 through the distribution action of the liquid adapter 10, and because the liquid phase enters the reaction tubes 8 from bottom to top to react with the catalyst 14, the contact time of the liquid phase feeding and the catalyst 14 can be controlled by controlling the pressure difference and the flow, the performance of the catalyst 14 can be fully utilized, and the optimal reaction condition can be achieved by reasonably utilizing the contact time. After the reaction is completed, the hydrogen-poor or hydrogen-rich carrier in the space above the reactor 13 flows down into the space below the reactor 11 by the circulating pipe 12 by gravity and is finally discharged from the liquid phase outlet 5, and the gas phase is discharged from the gas outlet 7.
In addition, in the dehydrogenation reaction, because the dehydrogenation reaction is an endothermic reaction, a part of heat exists in the hydrogen-deficient carrier after the reaction is completed, and the waste heat can be collected through the circulating pipe 12, so that the load of the heat exchange medium carrier is reduced, and the energy consumption is reduced. The lean hydrogen carrier after the reaction is finished is likely to be solidified due to low melting point, and the circulating pipe 12 also belongs to one of the heat exchange pipe bundles of the heat exchange medium, so that the energy consumption is reduced by preheating.
In addition, a plurality of circulation pipes 12 may be provided, and the load on the heat exchange medium carrier can be further reduced by providing a plurality of circulation pipes 12.
In this embodiment, the side of the shell 2 of the reactor body 1 is provided with a heat exchange medium inlet 4 and a heat exchange medium outlet 6 which are communicated with the heat exchange medium cavity 9. The heat exchange medium is supplied through the heat exchange medium inlet 4 and is discharged through the heat exchange medium outlet 6, wherein the heat exchange medium adopts a circulating supply mode, so that the temperature of the heat exchange medium is kept constant in a certain range, and the stability of hydrogenation or dehydrogenation reaction is improved.
In this embodiment, the heat exchange medium inlet 4 is disposed below the heat exchange medium outlet 6. Through such setting, heat transfer medium flows from down up, makes the speed of upflow slow down under its own gravity for heat transfer medium can reach the effect of abundant heat transfer.
In this embodiment, in order to further enhance the dehydrogenation or hydrogenation effect, a plurality of the reaction tubes 8 are arranged circumferentially at equal intervals around the circulation tube 12.
In this embodiment, in order to further enhance the dehydrogenation or hydrogenation effect, a plurality of reaction tubes 8 are layered in the radial direction of the reactor body 1, and the plurality of reaction tubes 8 in each layer are arranged circumferentially at equal intervals around the circulation tube 12.
In this embodiment, the liquid adapter 10 includes: a distribution plate, the upper end of which is provided with a plurality of outlet pipes 16 extending into the reaction tubes 8, and the lower end of which is provided with an inlet pipeline. The liquid phase enters the distribution plate from the inlet pipe, where a buffer chamber is located, and then enters the reaction tubes 8 from a plurality of outlet tubes 16 to react with the catalyst 14.
In this embodiment, the feed line comprises: a main pipe 3 and at least two branch pipes 15, the branch pipes 15 being arranged at equal intervals in the circumferential direction of the distributor plate. The uniformity of the liquid phase entering the reactor can be improved by providing a plurality of branch pipes 15 and arranging the branch pipes 15 at equal intervals in the circumferential direction of the distribution plate. As in one embodiment, two branch lines 15 are symmetrically arranged.
In the prior art, a hydrogen-rich liquid phase single pipe enters a reactor, the height of a catalyst 14 filling design space in the prior art is too high or too low, namely the height of an overflow weir is unreasonable, and the contact time of the catalyst 14 and a liquid phase is too long or too short, so that the reaction contact time period is too long or too short, and the reaction energy consumption is increased or the reaction is insufficient; the volume of the space for filling the catalyst 14 is too large, so that the catalyst 14 is not fully utilized and is wasted.
In the present invention, a flow valve and a pressure gauge are disposed on the inlet pipeline of the liquid adapter 10. For example, a flow valve and a pressure gauge are arranged on the outlet of the pump 17 and the inlet pipeline of the liquid adapter 10, the pressure difference is adjusted by adjusting the flow rate of the liquid phase, the pressure is observed in real time through the pressure gauge, the contact time of the liquid phase feeding and the catalyst 14 is controlled according to the pressure difference condition, the performance of the catalyst 14 is fully utilized, and the contact time is reasonably utilized to achieve the optimal reaction condition.
In this embodiment, the inner diameter of the reaction tube 8 is 22 to 55mm in order to further enhance the effect of the catalytic reaction.
In a second aspect, the present invention provides a dehydrogenation or hydrogenation process system, as shown in fig. 2, comprising: an organic liquid high-efficiency dehydrogenation or hydrogenation reactor, a pump 17, a hydrogen-poor liquid storage tank 19, a hydrogen-rich liquid storage tank 20 and a gas-liquid separation system 18; a liquid outlet of the gas-liquid separation system 18 is connected with the hydrogen-poor liquid storage tank 19 and the hydrogen-rich liquid storage tank 20, liquid outlets of the hydrogen-poor liquid storage tank 19 and the hydrogen-rich liquid storage tank 20 are connected with an inlet of the liquid adapter 10 through a pump 17, the gas outlet 7 is connected with a gas inlet of the gas-liquid separation system 18, a hydrogen gas inlet pipeline is further arranged on a rear end pipeline of the pump 17, and the liquid phase outlet 5 is connected with a liquid outlet pipeline of the gas-liquid separation system 18.
In the hydrogenation reaction, a hydrogen inlet pipeline is opened, the hydrogen-poor organic liquid in a hydrogen-poor liquid storage tank 19 is pumped into the liquid adapter 10 through the pump 17 for distribution, the hydrogen in the hydrogen inlet pipeline and the hydrogen-poor organic liquid are mixed and then enter the liquid adapter 10 for distribution, the distributed gas-liquid mixture reacts with the catalyst 14, redundant hydrogen after the reaction is discharged to a gas-liquid separation system 18 from a gas outlet 7, the separated hydrogen is compressed through a compressor 21 and then returns to the hydrogen inlet pipeline for recycling, the separated liquid returns to a hydrogen-rich liquid storage tank 20, and the hydrogen-rich liquid flowing out from a liquid phase outlet 5 flows to the hydrogen-rich liquid storage tank 20.
In the dehydrogenation reaction, the hydrogen-rich organic liquid in the hydrogen-rich liquid storage tank 20 is pumped into the liquid adapter 10 by the pump 17 for distribution, the distributed hydrogen-rich organic liquid reacts with the catalyst 14, the hydrogen gas generated after the reaction is discharged from the gas outlet 7 to the gas-liquid separation system 18, the separated hydrogen gas is compressed by the compressor 21 and then stored or used in other equipment, the separated liquid flows back to the hydrogen-poor liquid storage tank 19, and the hydrogen-poor liquid flowing out from the liquid phase outlet 5 flows to the hydrogen-poor liquid storage tank 19.
In the invention, when the catalysts 14 used for hydrogenation and dehydrogenation are different, a plurality of organic liquid high-efficiency dehydrogenation or hydrogenation reactors can be arranged in the same dehydrogenation or hydrogenation process system for switching use, and when the catalysts 14 used for hydrogenation and dehydrogenation are the same, one organic liquid high-efficiency dehydrogenation or hydrogenation reactor can be shared.
In the traditional process, reaction equipment, separation equipment and heat exchange equipment are integrally arranged. The equipment causes economic waste and cost increase, and meanwhile, the chemical properties of the hydrogen-poor carrier are considered to add a plurality of heat tracing pipelines, so that the energy consumption is increased, and the economic benefit is low.
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 invention 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. An organic liquid high efficiency dehydrogenation or hydrogenation reactor, characterized in that the organic liquid high efficiency dehydrogenation or hydrogenation reactor comprises: reactor body (1), the upper end of reactor body (1) is provided with gas outlet (7), and the lower extreme is provided with liquid phase outlet (5), and the middle part is provided with a plurality of reaction tubes (8) that fill catalyst (14), liquid adapter (10) is connected to the lower extreme of reaction tube (8), and is a plurality of be formed with heat transfer medium cavity (9) between reaction tube (8), the both ends of heat transfer medium cavity (9) set up to seal, fixed the inserting is provided with the edge in heat transfer medium cavity (9) circulating pipe (12) that the axial direction of reactor body (1) extends, the both ends of circulating pipe (12) set up to the opening.
2. A high-efficiency dehydrogenation or hydrogenation reactor for organic liquid as claimed in claim 1, wherein the side of the shell (2) of the reactor body (1) is provided with a heat exchange medium inlet (4) and a heat exchange medium outlet (6) which are communicated with the heat exchange medium cavity (9).
3. A high efficiency dehydrogenation or hydrogenation reactor for organic liquids according to claim 2 characterized in that the heat exchange medium inlet (4) is arranged below the heat exchange medium outlet (6).
4. A high efficiency dehydrogenation or hydrogenation reactor for organic liquids according to claim 1 characterized in that a plurality of said reaction tubes (8) are arranged circumferentially at equal intervals around said circulation tube (12).
5. A reactor for the efficient dehydrogenation or hydrogenation of organic liquids according to claim 4, characterized in that a plurality of reaction tubes (8) are distributed in layers along the radial direction of the reactor body (1), and a plurality of reaction tubes (8) in each layer are arranged in a circumferential direction around the circulation tube (12) at equal intervals.
6. The organic liquid high efficiency dehydrogenation or hydrogenation reactor according to claim 1, wherein the liquid adapter (10) comprises: the upper end of the distribution plate is provided with a plurality of outlet pipes (16) extending into the reaction pipes (8), and the lower end of the distribution plate is provided with an inlet pipeline.
7. The organic liquid high efficiency dehydrogenation or hydrogenation reactor according to claim 6, wherein the feed line comprises: the distribution plate comprises a main pipeline (3) and at least two branch pipelines (15), wherein the branch pipelines (15) are arranged at equal intervals along the circumferential direction of the distribution plate.
8. A high efficiency dehydrogenation or hydrogenation reactor for organic liquids according to claim 1 characterized in that the inlet pipeline of the liquid adapter (10) is provided with a flow valve and a pressure gauge.
9. A high efficiency dehydrogenation or hydrogenation reactor for organic liquids according to claim 1 characterized in that the inner diameter of the reaction tube (8) is 22-55 mm.
10. A dehydrogenation or hydrogenation process system, comprising: a high efficiency dehydrogenation or hydrogenation reactor for organic liquids, a pump (17), a hydrogen lean liquid storage tank (19), a hydrogen rich liquid storage tank (20), and a gas-liquid separation system (18) according to any one of claims 1-9;
the liquid outlet of the gas-liquid separation system (18) is connected with the hydrogen-poor liquid storage tank (19) and the hydrogen-rich liquid storage tank (20), and the liquid outlets of the hydrogen-poor liquid storage tank (19) and the hydrogen-rich liquid storage tank (20) are connected with the inlet of the liquid adapter (10) through a pump (17);
the gas outlet (7) is connected with a gas inlet of the gas-liquid separation system (18), a hydrogen inlet pipeline is further arranged on a pipeline at the rear end of the pump (17), and the liquid phase outlet (5) is connected with a liquid outlet pipeline of the gas-liquid separation system (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210398236.XA CN114682171A (en) | 2022-04-15 | 2022-04-15 | High-efficiency dehydrogenation or hydrogenation reactor and dehydrogenation or hydrogenation process system for organic liquid |
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| CN202210398236.XA CN114682171A (en) | 2022-04-15 | 2022-04-15 | High-efficiency dehydrogenation or hydrogenation reactor and dehydrogenation or hydrogenation process system for organic liquid |
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| CN101628216A (en) * | 2008-07-15 | 2010-01-20 | Ifp公司 | Treatment or hydrotreatment reactor |
| CN105148806A (en) * | 2009-12-28 | 2015-12-16 | 国际壳牌研究有限公司 | Reactor with gas distribution system in bottom |
| US20110172375A1 (en) * | 2010-01-14 | 2011-07-14 | Richard Cheng-Ming Yeh | Processes And Apparatus For Continuous Solution Polymerization |
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Application publication date: 20220701 |