CN113769663A - Fixed bed reaction device, synthesis system and synthesis method for methylamine synthesis - Google Patents

Fixed bed reaction device, synthesis system and synthesis method for methylamine synthesis Download PDF

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CN113769663A
CN113769663A CN202111102910.7A CN202111102910A CN113769663A CN 113769663 A CN113769663 A CN 113769663A CN 202111102910 A CN202111102910 A CN 202111102910A CN 113769663 A CN113769663 A CN 113769663A
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tower body
synthesis
fixed bed
catalyst layer
section
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CN113769663B (en
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王延吉
王存申
赵希合
朱敬伟
李玉超
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Liaocheng Luxi Methylamine Chemical Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • 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
    • B01J8/04—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 the fluid passing successively through two or more beds
    • B01J8/0446—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 the fluid passing successively through two or more beds the flow within the beds being predominantly vertical
    • B01J8/0449—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 the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical beds
    • B01J8/0453—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 the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical beds the beds being superimposed one above the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • 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
    • B01J8/04—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 the fluid passing successively through two or more beds
    • B01J8/0492—Feeding reactive fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • 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
    • B01J8/04—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 the fluid passing successively through two or more beds
    • B01J8/0496—Heating or cooling the reactor
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/04—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups
    • C07C209/14—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of hydroxy groups or of etherified or esterified hydroxy groups
    • C07C209/16—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of hydroxy groups or of etherified or esterified hydroxy groups with formation of amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00327—Controlling the temperature by direct heat exchange
    • B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
    • B01J2208/00345—Cryogenic coolants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00539—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00796—Details of the reactor or of the particulate material
    • B01J2208/00893—Feeding means for the reactants
    • B01J2208/00911—Sparger-type feeding elements
    • 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
    • Y02P20/141—Feedstock

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Abstract

The invention discloses a fixed bed reaction device, a synthesis system and a synthesis method for synthesizing methylamine, wherein the fixed bed reaction device comprises a tower body, a plurality of catalyst layers and a plurality of feeding pipes, wherein the catalyst layers are respectively arranged on cross sections of the tower body at different heights; the plurality of feeding pipes are arranged in parallel along the axial direction of the tower body and are uniformly distributed along the cross section of the tower body; the feeding end of the feeding pipe is arranged close to the bottom of the tower body, and the discharging end of the feeding pipe is arranged close to the top of the tower body; the synthesis gas outlet of the tower body is positioned at the lower end of the tower body. The inlet pipe can utilize reaction heat to heat the feed gas more fully, through the heat transfer, has improved the temperature of feed gas, because the synthetic reaction of methylamine needs to go on under certain temperature and pressure, consequently after improving the feed gas temperature, can make the reaction just can abundant catalytic reaction in one section packing of the top, can improve the utilization ratio of catalyst in the synthetic fixed bed reaction unit.

Description

Fixed bed reaction device, synthesis system and synthesis method for methylamine synthesis
Technical Field
The invention belongs to the technical field of methylamine production, and particularly relates to a fixed bed reaction device, a fixed bed reaction system and a fixed bed reaction method for methylamine synthesis. In particular to a device and a system for generating monomethylamine, dimethylamine and trimethylamine by amination reaction of methanol and ammonia under the action of a catalyst by utilizing a fixed bed reaction device.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Methylamine is an important chemical raw material, which is widely used in various departments of national economy, and is a basic raw material for industries such as pesticides, medicines, rubbers, leathers, synthetic dyes, synthetic resins, chemical fibers, solvents, surfactants, dyes, and photographic materials. The production process of methylamine includes several kinds, and the currently widely used method at home and abroad is methanol gas phase catalytic ammoniation process, which includes reaction of methanol and ammonia gas as raw material at certain temperature and pressure and in certain proportion under the action of catalyst to obtain mono-, di-and trimethylamine.
The product prepared by the method has good quality and low cost, and can be used for large-scale production of methylamine. However, the inventor finds that when the method is used for producing methylamine, a fixed bed reaction device of a fixed bed is adopted, and a plurality of catalyst bed layers are distributed in series, so that the problem of uneven material distribution exists, the utilization efficiency of the catalyst is low, and the reaction efficiency of the fixed bed reaction device is influenced; although the reaction is exothermic, the reaction needs to be carried out at a certain temperature, so that the raw material gas needs to be preheated, and further the energy consumption of the system is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fixed bed reaction device, a synthesis system and a synthesis method for methylamine synthesis. The fixed bed reaction device provided by the invention can be used for preheating the synthesis feed gas in advance by fully utilizing the synthesis reaction heat of methylamine, so that the utilization rate of the methylamine synthesis catalyst is effectively improved, the energy consumption of a system is reduced, and the production cost of a product is reduced; simultaneously, the methylamine synthesis raw material gas can be uniformly distributed on the fixed bed.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a fixed bed reaction device for synthesizing methylamine, which comprises a tower body, a plurality of catalyst layers and a plurality of feeding pipes, wherein the catalyst layers are respectively arranged on the cross sections of the tower body at different heights;
the plurality of feeding pipes are arranged in parallel along the axial direction of the tower body and are uniformly distributed along the cross section of the tower body;
the feeding end of the feeding pipe is arranged close to the bottom of the tower body, and the discharging end of the feeding pipe is arranged close to the top of the tower body;
the synthesis gas outlet of the tower body is positioned at the lower end of the tower body.
Furthermore, the discharge end of each feeding pipe and the top of the tower body are reserved for a set distance.
The discharge end and the top of the tower top are reserved with a set distance, the part of space forms a buffer space of the raw material gas, and the introduced raw material gas flows uniformly downwards after being buffered in the buffer space, so that the distribution uniformity of the raw material gas in the catalyst layer can be ensured under the condition.
Furthermore, the discharge ends of the feed pipes are flush. Further ensuring the distribution uniformity of the raw material gas.
In some embodiments, the feed end of each feed pipe is located near the bottom of the column. The methylamine synthesis raw material gas enters from the bottom of the tower body, flows out from the top of the tower body, has a long enough flowing distance in the tower, fully exchanges heat with the reaction environment outside the feeding pipe in the flowing process, preheats the raw material gas, and simultaneously enables the raw material gas to quickly react on the uppermost section of filler of the synthesis fixed bed reaction device, thereby effectively improving the utilization rate of the methylamine catalyst.
After the flowing raw material gas is uniformly distributed by buffering, the raw material gas is uniformly distributed in the catalyst layer again, and methylamine is synthesized under the catalysis of the catalyst.
In some embodiments, the syngas outlet of the tower is located at the bottom of the tower.
In some embodiments, the number of catalyst layers is 4, and from the top to the bottom of the tower body are a first stage catalyst layer, a second stage catalyst layer, a third stage catalyst layer, and a fourth stage catalyst layer, respectively.
Further, the first section of catalyst layer is provided with a stainless steel wire mesh layer, a ceramic ball layer and a catalyst layer from bottom to top in sequence. The ceramic ball layer comprises
Figure BDA0003268585240000031
A ceramic ball layer and
Figure BDA0003268585240000032
and (4) a ceramic ball layer. The stainless steel wire mesh layer is 20 meshes.
Further, the stainless steel wire mesh layer and the catalyst layer are sequentially arranged on the second section of catalyst layer and the third section of catalyst layer from bottom to top. The stainless steel wire mesh layer is 20 meshes.
Further, a stainless steel wire mesh layer, a catalyst layer and a catalyst layer are sequentially arranged on the fourth section of catalyst layer from bottom to top,
Figure BDA0003268585240000033
A ceramic ball layer and
Figure BDA0003268585240000034
and (4) a ceramic ball layer.
In some embodiments, the feed tube is fixedly mounted. The four feeding pipes are fixed, so that the situation that the four feeding pipes vibrate due to the flowing of materials can be prevented.
In some embodiments, each catalyst layer is provided with a manhole and a discharge hole. Wherein the manhole is used as a personnel entering channel and a catalyst filling channel when the catalyst is filled, the discharge hole is positioned at the bottommost part of each section of filler, and the manhole is used as a discharge channel of the old catalyst when the catalyst is replaced.
In some embodiments, the top of the tower body is provided with a rupture disc and a safety valve. Can be used for emergency pressure relief valves in case of emergency of synthesis reaction.
Furthermore, the top of the tower body is provided with an emptying valve. And part of non-condensable gas is generated in the methylamine synthesis reaction, and the emptying valve can discharge the non-condensable gas generated by the system in time.
In a second aspect, the invention provides a synthesis system for methylamine synthesis, which comprises a Venturi mixer and the fixed bed reaction device, wherein a raw material gas source is connected with an inlet of the Venturi mixer, a cold shock material source is connected with a side line inlet of the Venturi mixer, and an outlet of the Venturi mixer is connected with each feeding pipe.
The mixing chamber of the Venturi mixer uniformly mixes the feed gas and the cold shock material, so that the stability of the components of the material entering the synthetic fixed bed reaction device is ensured, and the reaction of the synthetic tower can be stably carried out.
In a third aspect, the present invention provides a method for synthesizing methylamine, comprising the following steps:
uniformly mixing a raw material gas for synthesizing methylamine and a cold shock material through a Venturi mixer, uniformly entering each feeding pipe through a bottom inlet, flowing from bottom to top in the feeding pipes, and exchanging heat with a reaction environment outside the feeding pipes in the flowing process to preheat the raw material gas;
the preheated feed gas flows out from the top outlet of the feed pipe, is uniformly distributed on the cross section of the tower body after being buffered at the top of the tower, then uniformly flows through each catalyst layer from top to bottom to perform catalytic reaction, and the reaction product flows out from the lower end of the tower body.
The beneficial effects obtained by one or more of the above embodiments of the invention are as follows:
(1) the invention uses the material flow characteristic of the mixer to fully mix the material gas entering the methylamine synthesizer and the cold shock material by arranging the Venturi mixer in front of the methylamine synthesizer, and the mixed material is stable in temperature and components, thereby ensuring the stability of methylamine synthesis.
(2) The synthesis tower feeding pipe provided by the invention ensures the contact area and the contact time of the raw material gas and the synthesis gas, and simultaneously has the advantages of ensuring that the raw material gas is more uniformly distributed in the synthesis fixed bed reaction device and better catalyzing the synthesis reaction compared with the traditional fixed bed reaction device with one central pipe.
(3) The invention can more fully utilize the reaction heat to heat the raw material gas through the feeding pipe, and the temperature of the raw material gas is improved through heat exchange.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram showing the overall structure of a synthesis reaction apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the distribution of feed pipes in a synthetic fixed bed reactor in an example of the present invention;
FIG. 3 is a schematic structural diagram of a synthesis reaction apparatus according to an embodiment of the present invention.
The method comprises the following steps of 1-safety valve, 2-first section catalyst layer, 3-second section catalyst layer, 4-third section catalyst layer, 5-manhole, 6-discharge hole, 7-Venturi mixer, 8-feed pipe, 9-fourth section catalyst layer, 10-vent pipeline and 11-discharge hole.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described above, in the reaction process of some existing fixed bed reaction apparatuses for methylamine synthesis, the synthesis reaction is unstable and the energy consumption of the reaction is high due to unstable material feeding components, uneven distribution of raw material gas in the fixed bed reaction apparatus, insufficient utilization of reaction heat and the like, so that the invention provides a uniformly dispersed reaction apparatus; the invention will now be further described with reference to the drawings and detailed description.
Referring to fig. 1, a system for synthesis of methylamine comprises: the device comprises a Venturi mixer 7, a methylamine synthesis fixed bed reaction device, four feeding pipes 8, a manhole 5, a discharge opening 6, four catalyst layers, a catalyst temperature measuring point, a safety valve 12, a vent pipeline 10 and the like.
The raw material gas for methylamine reaction flows at the inlet of the Venturi mixer 7, the raw material gas rapidly flows in the Venturi mixer 7, negative pressure is formed in the air suction chamber, the cold shock material enters the air suction chamber at the side inlet of the Venturi mixer 7, is uniformly mixed with the raw material gas in the air suction chamber, and enters the fixed bed reaction device for methylamine synthesis through the outlet of the Venturi mixer 7. The material of the Venturi mixer 7 is at least S30408, and particularly, the material at the nozzle of the Venturi mixer 7 is required to be wear-resistant and corrosion-resistant.
The raw material gas feed pipe 8 of the methylamine synthesis fixed bed reaction device is a go direction after synthesis raw material gas enters the synthesis fixed bed reaction device, four feed pipes 8 are uniformly distributed in the synthesis fixed bed reaction device, in order to prevent the feed pipes 8 from vibrating, the feed pipes 8 are fixed with the tower wall in a welding mode, the raw material gas flows from bottom to top in the pipes after entering the feed pipes 8, exchanges heat with synthesis gas outside the pipes and is heated, the raw material gas after heat exchange is turned back downwards after coming out from the outlet of the feed pipe at the top of the synthesis fixed bed reaction device and is uniformly contacted with the uppermost layer of catalyst filler in the synthesis fixed bed reaction device, the raw material gas is subjected to amination reaction under the action of a methylamine catalyst, and is catalyzed by four sections of catalysts to generate ditrimethylamine, and the reaction gas enters the next section of process for purification and separation through the outlet of the synthesis fixed bed reaction device, due to the uniform distribution of the catalyst material lifting pipe and the advanced preheating of the raw material gas, the purposes of fully utilizing the catalyst and reducing the energy consumption of the system can be achieved.
The manhole 5 of the synthetic fixed bed reaction device is used for loading methylamine catalyst, installing catalyst porcelain balls and installing catalyst supporting nets.
The discharge hole 6 of the synthetic fixed bed reaction device is used for discharging the catalyst for use after the methylamine catalyst reaches the use period, and the value of the discharge manhole is that the catalyst can be rapidly discharged out of the synthetic fixed bed reaction device, so that potential safety hazards caused by personnel entering the synthetic fixed bed reaction device are reduced.
The air release valve of the synthetic fixed bed reaction device is used for adjusting the pressure of the methylamine synthetic fixed bed reaction device, and the methylamine synthetic reaction is accompanied with certain side reaction, so that partial non-condensable gas can be generated by the side reaction, and the generated synthetic gas needs to be discharged out of the system in time in order to ensure the synthetic pressure.
The safety valve of the synthetic fixed bed reaction device is suitable for pressure relief under emergency of the synthetic fixed bed reaction device, and when the system overpressure is caused by reaction reasons of the methylamine synthetic fixed bed reaction device, the pressure of the system can be timely discharged out of the system through the vent pipeline of the safety valve, so that safety accidents are avoided.
The side inlet of the venturi mixer is connected with the cold shock material, and the function of the venturi mixer is to adjust the temperature in the fixed bed reaction device.
The first section of catalyst layer 2 is composed of two layers of isolated stainless steel wire meshes (20 meshes) from bottom to top, and is degreased, cleaned and dried
Figure BDA0003268585240000081
A ceramic ball layer,
Figure BDA0003268585240000082
A ceramic ball layer and a catalyst layer.
The second section of catalyst layer 3 and the third section of catalyst layer 4 are respectively two layers of isolated stainless steel wire mesh (20 meshes) and catalyst layers from bottom to top.
The fourth catalyst layer 9 comprises two layers of isolated stainless steel wire mesh (20 meshes), a catalyst layer,
Figure BDA0003268585240000083
A ceramic ball layer and
Figure BDA0003268585240000084
and (4) a ceramic ball layer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A fixed bed reaction device for methylamine synthesis is characterized in that: the device comprises a tower body, a plurality of catalyst layers and a plurality of feeding pipes, wherein the catalyst layers are respectively arranged on the cross sections of the tower body at different heights;
the plurality of feeding pipes are arranged in parallel along the axial direction of the tower body and are uniformly distributed along the cross section of the tower body; the feeding end of the feeding pipe is arranged close to the bottom of the tower body, and the discharging end of the feeding pipe is arranged close to the top of the tower body;
the synthesis gas outlet of the tower body is positioned at the lower end of the tower body.
2. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: a set distance is reserved between the discharge end of each feed pipe and the top of the tower body;
furthermore, the discharge ends of the feed pipes are flush.
3. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: the feed end of each feed pipe is close to the bottom of the tower body.
4. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: the synthesis gas outlet of the tower body is positioned at the bottom of the tower body.
5. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: the number of the catalyst layers is 4, and a first section of catalyst layer, a second section of catalyst layer, a third section of catalyst layer and a fourth section of catalyst layer are respectively arranged from the top to the bottom of the tower body;
further, the first section of catalyst layer is sequentially provided with a stainless steel wire mesh layer, a ceramic ball layer and a catalyst layer from bottom to top;
further, the stainless steel wire mesh layer and the catalyst layer are sequentially arranged on the second section of catalyst layer and the third section of catalyst layer from bottom to top;
further, a stainless steel wire mesh layer, a catalyst layer and a catalyst layer are sequentially arranged on the fourth section of catalyst layer from bottom to top,
Figure FDA0003268585230000021
A ceramic ball layer and
Figure FDA0003268585230000022
and (4) a ceramic ball layer.
6. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: the feed pipe is fixedly installed.
7. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: each catalyst layer is provided with a manhole and a discharge hole.
8. A fixed bed reactor apparatus for the synthesis of methylamines as set forth in claim 1, wherein: the top of the tower body is provided with a rupture disk and a safety valve;
furthermore, the top of the tower body is provided with an emptying valve.
9. A synthetic system for methylamine synthesis, which is characterized in that: comprising a Venturi mixer and a fixed bed reaction device as described in any one of claims 1 to 8, wherein a raw material gas source is connected with an inlet of the Venturi mixer, a cold shock material source is connected with a side inlet of the Venturi mixer, and an outlet of the Venturi mixer is connected with each feeding pipe.
10. A synthetic method for methylamine is characterized in that: the method comprises the following steps:
uniformly mixing a raw material gas for synthesizing methylamine and a cold shock material through a Venturi mixer, uniformly entering each feeding pipe through a bottom inlet, flowing from bottom to top in the feeding pipes, and exchanging heat with a reaction environment outside the feeding pipes in the flowing process to preheat the raw material gas;
the preheated feed gas flows out from the top outlet of the feed pipe, is uniformly distributed on the cross section of the tower body after being buffered at the top of the tower, then uniformly flows through each catalyst layer from top to bottom to perform catalytic reaction, and the reaction product flows out from the lower end of the tower body.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004820A1 (en) * 1984-04-23 1985-11-07 Mitsubishi Jukogyo Kabushiki Kaisha Reactor
CN201086010Y (en) * 2007-08-22 2008-07-16 安阳化学工业集团有限责任公司 Energy-saving insulation reactor for synthesizing methylamine
CN203183988U (en) * 2013-04-23 2013-09-11 淄博伟创石油化工设计有限公司 Benzene alkylation fixed bed reactor
WO2016152151A1 (en) * 2015-03-23 2016-09-29 千代田化工建設株式会社 Process and device for producing synthesis gas
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