CN110975768A - Pyromellitic dianhydride reactor - Google Patents
Pyromellitic dianhydride reactor Download PDFInfo
- Publication number
- CN110975768A CN110975768A CN201911271687.1A CN201911271687A CN110975768A CN 110975768 A CN110975768 A CN 110975768A CN 201911271687 A CN201911271687 A CN 201911271687A CN 110975768 A CN110975768 A CN 110975768A
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- Prior art keywords
- tank body
- reaction gas
- air inlet
- inlet pipe
- air
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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
- B01J8/06—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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- 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
- B01J8/0278—Feeding reactive fluids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
- C07D493/04—Ortho-condensed systems
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
The invention relates to the technical field of chemical equipment, and discloses a pyromellitic dianhydride reactor, which comprises a tank body, wherein one side of the bottom of the tank body is provided with a reaction gas outlet, the top of the tank body is provided with a reaction gas inlet, one side of the upper end of the tank body is provided with a molten salt inlet, one side of the lower end of the tank body is provided with a molten salt outlet, the bottom of the tank body is fixedly provided with a supporting leg, one side of the top of the tank body is provided with an air inlet, the lower end of the inside of the tank body is fixedly provided with an air inlet pipe, one end of the air inlet pipe penetrates through the air inlet and extends out of the tank body and is fixedly arranged with a blower, the pyromellitic dianhydride reactor is horizontally provided with the reaction gas inlet pipe above tubes, so that the reaction gas in each tube is uniformly fed, the air speed can be controlled, and the reaction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of biochemical equipment, in particular to a pyromellitic dianhydride reactor.
Background
Pyromellitic dianhydride is widely used and is an important chemical raw material, and various preparation modes of pyromellitic dianhydride are available, wherein the most common durene gas-phase oxidation process is adopted. When the process is adopted, the reaction speed is reduced due to insufficient air input, the hot spot temperature is overhigh, the temperature fluctuation of the hot spot due to insufficient reaction is too large due to unstable reaction air input, so that the local side reaction is increased, and the selectivity is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the pyromellitic dianhydride reactor which has the advantages of stable reaction gas feeding and sufficient air quantity, and solves the problems in the background technology.
The invention provides the following technical scheme: a pyromellitic dianhydride reactor comprises a tank body, wherein a reaction gas outlet is formed in one side of the bottom of the tank body, a reaction gas inlet is formed in the top of the tank body, a molten salt inlet is formed in one side of the upper end of the tank body, a molten salt outlet is formed in one side of the lower end of the tank body, supporting legs are fixedly mounted at the bottom of the tank body, an air inlet is formed in one side of the top of the tank body, an air inlet pipe is fixedly mounted at the upper end of the tank body, one end of the air inlet pipe penetrates through the air inlet and extends out of the tank body and is fixedly mounted with a blower, a reaction gas inlet pipe is fixedly mounted at the upper end inside the tank body, two ends of the upper part of the inner wall of the tank body are fixedly mounted with two ends of a first tube supporting plate, two ends of the lower, and the tubes are filled with catalyst.
And carefully selecting, wherein one end of the air inlet pipe in the tank body is provided with three groups of equidistant air outlets positioned below the second tube array supporting plate, and the air outlets are in a horn shape.
And carefully selecting, wherein one end of the reaction gas inlet pipe in the tank body is provided with air outlets which are arranged above the tubes at equal intervals.
Carefully, the number of the supporting legs is three.
Compared with the prior art, the invention has the following beneficial effects:
1. this pyromellitic dianhydride reactor is through the top installation reaction gas air inlet at the tubulation to install the equidistant air outlet of being separated from at this reactor air inlet, make the reaction gas air inlet of tubulation stable, avoid the reaction to produce too high temperature and produce the side reaction, the reaction gas feeding unstability can make the hot temperature rise, and temperature fluctuation increases.
2. This pyromellitic dianhydride reactor is through installing air inlet above the tubulation for the air of tubulation evenly gets into, and air velocity steadily can control, and the temperature when reducing oxidation reaction and producing is not even enough than ordinary reactor air pipe air admission, makes the oxidation reaction temperature too high easily, reduces the selectivity.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic view of an air intake of the present invention;
FIG. 3 is a schematic view of a reaction gas inlet pipe of the structure of the present invention.
In the figure: 1. a tank body; 2. a reaction gas outlet; 3. a reaction gas inlet; 4. a molten salt inlet; 5. a molten salt outlet; 6. supporting legs; 7. an air inlet; 8. an air inlet pipe; 9. a blower; 10. a reaction gas inlet pipe; 11. a first support plate; 12. a second support plate; 13. and (4) arranging pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a pyromellitic dianhydride reactor comprises a tank body 1, a reaction gas outlet 2 is formed at one side of the bottom of the tank body 1, a reaction gas inlet 3 is formed at the top of the tank body 1, a molten salt inlet 4 is formed at one side of the upper end of the tank body 1, a molten salt outlet 5 is formed at one side of the lower end of the tank body 1, support legs 6 are fixedly installed at the bottom of the tank body 1, an air inlet 7 is formed at one side of the top of the tank body 1, an air inlet pipe 8 is fixedly installed at the upper end of the inside of the tank body 1, one end of the air inlet pipe 8 passes through the air inlet 7 and extends out of the tank body 1 and is fixedly installed with a blower 9, a reaction gas inlet pipe 10 is fixedly installed at the upper end of the inside of the tank body 1, two ends of the upper, a tube array 13 is fixedly arranged between the tube array support plate I11 and the tube array support plate II 12, and the tube array 13 is filled with a catalyst.
Wherein, the air intake pipe 8 is in the inside one end of jar body 1 for being located three groups of equidistant air outlets of being separated from of tubulation backup pad two 12 below, and the shape of this air outlet is the horn type, utilizes the air outlet of this kind of design, and the air in the reactor can distribute evenly, stably, has improved reaction efficiency.
Wherein, one end of the reaction gas inlet pipe 10 in the tank body 1 is provided with air outlets which are arranged above the tubes 13 and are at equal intervals, and the air input of the reaction gas is stable and can be controlled by utilizing the air outlets at equal intervals, so that the condition of overheating reaction is avoided.
Wherein, the quantity of supporting leg 6 is three, utilizes and can make the rational in infrastructure stability of jar body at three supporting legs of reactor bottom fixed mounting, is favorable to the reaction to go on.
The working principle is as follows: when the reactor is used, a proper amount of catalyst is added into the tubes 13, molten salt is added into the tank body 1 from the molten salt inlet 4, the blower 9 is started, air is conveyed into the tank body 1 from the air inlet pipe 8, the reaction gas conveying device is started, reaction gas is conveyed into the tank body 1 from the reaction gas inlet pipe 10, the reaction gas reacts in the tubes 13, and products are discharged from the reaction gas outlet 2.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention. In the drawings of the present invention, the filling pattern is only for distinguishing the layers, and is not limited to any other way.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a pyromellitic dianhydride reactor, includes jar body (1), its characterized in that: a reaction gas outlet (2) is formed in one side of the bottom of the tank body (1), a reaction gas inlet (3) is formed in the top of the tank body (1), a molten salt inlet (4) is formed in one side of the upper end of the tank body (1), a molten salt outlet (5) is formed in one side of the lower end of the tank body (1), support legs (6) are fixedly mounted at the bottom of the tank body (1), an air inlet (7) is formed in one side of the top of the tank body (1), an air inlet pipe (8) is fixedly mounted at the upper end of the inside of the tank body (1), one end of the air inlet pipe (8) penetrates through the air inlet (7) to extend out of the tank body (1) and is fixedly mounted with an air blower (9), a reaction gas inlet pipe (10) is fixedly mounted at the upper end of the inside of the tank body (1), and two ends, the two ends of the lower part of the inner wall of the tank body (1) and the two ends of the tube support plate II (12) are fixedly installed, a tube (13) is fixedly installed between the tube support plate I (11) and the tube support plate II (12), and a catalyst is filled in the tube (13).
2. The pyromellitic dianhydride reactor according to claim 1, characterized in that: one end of the air inlet pipe (8) in the tank body (1) is provided with three groups of equidistant air outlets positioned below the tube array supporting plate II (12), and the air outlets are horn-shaped.
3. The pyromellitic dianhydride reactor according to claim 1, characterized in that: one end of the reaction gas inlet pipe (10) in the tank body (1) is an air outlet which is positioned above the tube nest (13) and is spaced at equal intervals.
4. The pyromellitic dianhydride reactor according to claim 1, characterized in that: the number of the supporting legs (6) is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271687.1A CN110975768A (en) | 2019-12-12 | 2019-12-12 | Pyromellitic dianhydride reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271687.1A CN110975768A (en) | 2019-12-12 | 2019-12-12 | Pyromellitic dianhydride reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110975768A true CN110975768A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911271687.1A Pending CN110975768A (en) | 2019-12-12 | 2019-12-12 | Pyromellitic dianhydride reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591485A (en) * | 2022-11-25 | 2023-01-13 | 石家庄昊普科技有限公司（Cn） | Pyromellitic dianhydride reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10134026A1 (en) * | 2000-07-12 | 2002-01-24 | Basf Ag | Countercurrent reactor, for use in oxidative preparation of (meth)acrylic acid, comprising contact tube bundle and having system for improving flow of circulating heat exchange medium |
| CN103097014A (en) * | 2010-09-14 | 2013-05-08 | 旭化成化学株式会社 | Gaseous phase exothermic reaction method and gaseous phase exothermic reaction device |
| CN204933425U (en) * | 2015-09-01 | 2016-01-06 | 云南大为恒远化工有限公司 | A kind of calandria type fixed bed reactor of benzene oxidatoin cis-butenedioic anhydride |
| CN207576356U (en) * | 2017-04-25 | 2018-07-06 | 郑忠 | A kind of chemical industry equipment of propane acrylonitrile production |
-
2019
- 2019-12-12 CN CN201911271687.1A patent/CN110975768A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10134026A1 (en) * | 2000-07-12 | 2002-01-24 | Basf Ag | Countercurrent reactor, for use in oxidative preparation of (meth)acrylic acid, comprising contact tube bundle and having system for improving flow of circulating heat exchange medium |
| CN103097014A (en) * | 2010-09-14 | 2013-05-08 | 旭化成化学株式会社 | Gaseous phase exothermic reaction method and gaseous phase exothermic reaction device |
| CN204933425U (en) * | 2015-09-01 | 2016-01-06 | 云南大为恒远化工有限公司 | A kind of calandria type fixed bed reactor of benzene oxidatoin cis-butenedioic anhydride |
| CN207576356U (en) * | 2017-04-25 | 2018-07-06 | 郑忠 | A kind of chemical industry equipment of propane acrylonitrile production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591485A (en) * | 2022-11-25 | 2023-01-13 | 石家庄昊普科技有限公司（Cn） | Pyromellitic dianhydride reactor |
| CN115591485B (en) * | 2022-11-25 | 2023-03-10 | 石家庄昊普科技有限公司 | Pyromellitic dianhydride reactor |
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Application publication date: 20200410 |
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| RJ01 | Rejection of invention patent application after publication |