CN219072905U - Acrolein synthesis oxidation reactor - Google Patents
Acrolein synthesis oxidation reactor Download PDFInfo
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- CN219072905U CN219072905U CN202223547108.1U CN202223547108U CN219072905U CN 219072905 U CN219072905 U CN 219072905U CN 202223547108 U CN202223547108 U CN 202223547108U CN 219072905 U CN219072905 U CN 219072905U
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Abstract
An acrolein synthesis oxidation reactor belongs to the technical field of synthesis reactors. The method is characterized in that: an upper layer heating bin (2) and a lower layer heating bin (2) are arranged in the reactor tank body (1) in a sealing manner, a plurality of reaction tubes (11) which are penetrated up and down are arranged in the heating bin (2) in a sealing manner, a catalyst attaching layer (1102) is attached to the inner wall of each reaction tube (11), and the heating bin (2) is connected with a heating pipeline; the lower part of the heating bin (2) is provided with a cooling bin (7) in a sealing way, a plurality of cooling pipes which are penetrated up and down are arranged in the cooling bin (7) in a sealing way, and the cooling bin (7) is connected with a cooling liquid pipeline (8). The oxidation reactor is divided into two sections of reaction areas and one section of cooling area, so that the performance of the reaction product is uniform, the subsequent process is convenient to adjust, the excessive oxidation of acrolein is avoided, and the yield of the target product is improved.
Description
Technical Field
An acrolein synthesis oxidation reactor belongs to the technical field of synthesis reactors.
Background
Acrylic acid production is typically produced from propylene by a two-stage oxidation reaction, so the oxidation reactor is a key device in the acrylic acid synthesis industry. The oxidation reactor is typically a fixed bed reactor used directly in conventional propylene oxidation synthesis systems. The existing fixed bed reactor consists of a shell side and a tube side, and comprises a reaction cylinder body, an upper tube plate and a lower tube plate which are arranged in the reaction cylinder body, and a reaction tube which is arranged in the reaction cylinder body and penetrates through the upper tube plate and the lower tube plate, wherein a material inlet and a material outlet are arranged on the reaction cylinder body. When the fixed bed reactor is used, after reaction materials enter the reaction tubes, the materials in each reaction tube can not exchange mutually. If the materials are not fully and uniformly mixed before entering the reaction tubes, the reaction rate and the reaction efficiency in each reaction tube are different, and the performance of the product is different, so that the quality of the product is unstable.
Disclosure of Invention
The utility model aims to solve the technical problems that: overcomes the defects of the prior art and provides an acrolein synthesis oxidation reactor with stable and uniform synthetic product quality.
The technical scheme adopted for solving the technical problems is as follows: the acrolein synthesis oxidation reactor comprises a reactor tank body, wherein the top of the reactor tank body is connected with a reactant feeding pipe, and the bottom of the reactor tank body is connected with a synthetic material pipe, and is characterized in that:
an upper layer heating bin and a lower layer heating bin are arranged in the reactor tank body in a sealing manner, a plurality of reaction tubes which are penetrated up and down are arranged in the heating bin in a sealing manner, a catalyst attaching layer is attached to the inner wall of each reaction tube, and the heating bin is connected with a heating pipeline; the lower part of the heating bin is provided with a cooling bin in a sealing way, a plurality of cooling pipes which are penetrated up and down are arranged in the cooling bin in a sealing way, and the cooling bin is connected with a cooling liquid pipeline.
The heating bin is provided with at least two layers, and materials pass through one section of mixing layer in the process from the upper layer to the lower layer, so that the materials can be further mixed, and the conversion rate difference caused by temperature, concentration and the like is reduced. The cooling bin is arranged below the heating bin for reaction, so that the temperature can be reduced more timely, the reaction time can be controlled, and peroxidation can be prevented. The heating of the heating bin and the cooling of the cooling bin are respectively and independently carried out, the influence of each other is small, the oxidation temperature of the propylene raw material can be ensured, the reaction can be timely stopped, and the oxidation degree is controlled.
Preferably, a reaction material distributor is arranged above the heating bin. The reaction materials are dispersed before entering the reaction tube of the heating bin, so that the materials are prevented from being too concentrated, and the utilization rate of the heating bin is improved.
Preferably, a collecting hopper is arranged below the cooling bin, and the synthetic material pipe is connected to the bottom of the collecting hopper. And a collecting hopper is arranged below the cooling bin, the materials cooled by the cooling bin are timely collected and sent to the next working procedure from the synthetic material pipe, and the accumulation of the materials in the reactor is reduced.
Preferably, the top surface and the bottom surface of the heating bin are correspondingly and fixedly provided with fixing rings, the fixing rings are internally and spirally connected with tetrafluoro sealing rings, and the reaction tube is arranged in the heating bin in a sealing way through the tetrafluoro sealing rings. The mounting mode of the reaction tubes can enable each reaction tube to be independently dismounted, so that the catalyst can be timely and accurately replenished or replaced, and the oxidation rate of the oxidation reaction is ensured.
Preferably, the heating pipeline is a heat conducting oil return pipeline and a heat conducting oil supply pipeline, and the heat conducting oil return pipeline and the heat conducting oil supply pipeline are connected with an external heat conducting oil constant temperature heating system. The heat supply is carried out by using heat conduction oil, so that the temperature of the heating bin is more stable, and the long-term stable oxidation reaction is facilitated.
Preferably, the height and the diameter of the heating bin are 1:1.5-2.5.
Preferably, the height and the diameter of the cooling bin are 1:3-5.
Preferably, the reaction tube is made of stainless steel.
Preferably, the catalyst on the catalyst attached layer is a catalyst containing molybdenum or/and vanadium.
Compared with the prior art, the acrolein synthesis oxidation reactor has the following beneficial effects: the heating bin is provided with at least two layers, and materials pass through one section of mixing layer in the process from the upper layer to the lower layer, so that the materials can be further mixed, and the conversion rate difference caused by temperature, concentration and the like is reduced. The cooling bin is arranged below the heating bin for reaction, so that the temperature can be reduced more timely, the reaction time can be controlled, and peroxidation can be prevented. The heating of the heating bin and the cooling of the cooling bin are respectively and independently carried out, the influence of each other is small, the oxidation temperature of the propylene raw material can be ensured, the reaction can be timely stopped, and the oxidation degree is controlled. The mounting mode of the reaction tubes can enable each reaction tube to be independently dismounted, so that the catalyst can be timely and accurately replenished or replaced. The oxidation reactor is divided into two sections of reaction areas and one section of cooling area, so that the performance of the reaction product is uniform, the subsequent process is convenient to adjust, the excessive oxidation of acrolein is avoided, and the yield of the target product is improved.
Drawings
FIG. 1 is a schematic diagram of an acrolein synthesis oxidation reactor of the present utility model.
FIG. 2 is a schematic diagram of a synthesis chamber of an acrolein synthesis oxidation reactor of the present utility model.
Fig. 3 is an enlarged view at a in fig. 2.
Wherein, 1, reactor tank 2, heating bin 201, fixed ring 202, tetrafluoro sealing ring 3, reactant distributor 4, reactant feed pipe 5, conduction oil return line 6, conduction oil feed line 7, cooling bin 8, coolant line 9, composite material pipe 10, collecting hopper 11, reaction pipe 1101, reaction pipe funnel 1102, catalyst attachment layer.
Detailed Description
FIGS. 1-3 illustrate preferred embodiments of the present utility model, and the present utility model will be further described with reference to FIGS. 1-3.
Referring to fig. 1 to 3: the utility model relates to an acrolein synthesis oxidation reactor, which comprises a reactor tank body 1, a heating bin 2 and a cooling bin 7, wherein the top of the reactor tank body 1 is connected with a reactant feed pipe 4, and pre-mixed air and propylene enter the oxidation reactor from the reactant feed pipe 4; the reaction material distributor 3 is arranged above the heating bin 2, and materials are dispersed before entering the reaction tube 11 of the heating bin 2, so that the materials are prevented from being too concentrated. At least two layers of heating cabins 2 are arranged in the reactor tank body 1 in a sealing manner, and materials can pass through a section of mixing layer in the process from the upper layer of heating cabins 2 to the lower layer of heating cabins 2, so that the materials are further mixed. A plurality of reaction tubes 11 which are penetrated up and down are hermetically arranged in the heating bin 2, a catalyst attaching layer 1102 is attached to the inner wall of the reaction tubes 11, the heating bin 2 is connected with a heating pipeline, and the mixed material is heated in the reaction tubes 11 and contacts with a catalyst to perform oxidation reaction to generate acrolein; the heating pipeline is a heat conducting oil return pipeline 5 and a heat conducting oil supply pipeline 6, and the heat conducting oil return pipeline 5 and the heat conducting oil supply pipeline 6 are connected with an external heat conducting oil constant temperature heating system to provide stable temperature heating. The cooling bin 7 is arranged under the heating bin 2 in a sealing way, a plurality of cooling pipes which are penetrated up and down are arranged in the cooling bin 7 in a sealing way, and the cooling bin 7 is connected with a cooling liquid pipeline 8, so that the temperature can be reduced timely, and the reaction time can be controlled. The below of cooling bin 7 is equipped with aggregate bin 10, and composite material pipe 9 is connected in aggregate bin 10 bottom, and the timely collection of material through cooling bin 7 cooling is sent into next process from composite material pipe 9. The top surface and the bottom surface of the heating bin 2 are correspondingly fixed with a fixed ring 201, the fixed ring 201 is internally connected with a tetrafluoro sealing ring 202 in a threaded manner, the reaction tubes 11 are arranged in the heating bin 2 in a sealing manner through the tetrafluoro sealing ring 202, and each reaction tube 11 can be independently disassembled and assembled, so that the catalyst can be timely and accurately supplemented or replaced. The height and diameter of the heating bin 2 are 1:1.5-2.5, the temperature of the oxidation reaction is controlled to be about 150 ℃, the height and diameter of the cooling bin 7 are 1:3-5, and the material of the reaction tube 11 is stainless steel.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (8)
1. The utility model provides an acrolein synthesis oxidation reactor, includes reactor jar body (1), and reactor jar body (1) top is connected with reactant inlet pipe (4), and reactor jar body (1) bottom is connected with synthetic material pipe (9), its characterized in that:
an upper layer heating bin (2) and a lower layer heating bin (2) are arranged in the reactor tank body (1) in a sealing manner, a plurality of reaction tubes (11) which are penetrated up and down are arranged in the heating bin (2) in a sealing manner, a catalyst attaching layer (1102) is attached to the inner wall of each reaction tube (11), and the heating bin (2) is connected with a heating pipeline; the lower part of the heating bin (2) is provided with a cooling bin (7) in a sealing way, a plurality of cooling pipes which are penetrated up and down are arranged in the cooling bin (7) in a sealing way, and the cooling bin (7) is connected with a cooling liquid pipeline (8).
2. An acrolein synthesis oxidation reactor according to claim 1, wherein:
a reaction material distributor (3) is arranged above the heating bin (2).
3. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the lower part of the cooling bin (7) is provided with a collecting hopper (10), and the composite material pipe (9) is connected to the bottom of the collecting hopper (10).
4. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the top surface and the bottom surface of the heating bin (2) are correspondingly and fixedly provided with a fixed ring (201), the fixed ring (201) is internally and in threaded connection with a tetrafluoro sealing ring (202), and the reaction tube (11) is arranged in the heating bin (2) in a sealing way through the tetrafluoro sealing ring (202).
5. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the heating pipeline is a heat conducting oil return pipeline (5) and a heat conducting oil supply pipeline (6), and the heat conducting oil return pipeline (5) and the heat conducting oil supply pipeline (6) are connected with an external heat conducting oil constant temperature heating system.
6. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the height and the diameter of the heating bin (2) are 1:1.5-2.5.
7. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the height and the diameter of the cooling bin (7) are 1:3-5.
8. An acrolein synthesis oxidation reactor according to claim 1, wherein:
the reaction tube (11) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223547108.1U CN219072905U (en) | 2022-12-20 | 2022-12-20 | Acrolein synthesis oxidation reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223547108.1U CN219072905U (en) | 2022-12-20 | 2022-12-20 | Acrolein synthesis oxidation reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219072905U true CN219072905U (en) | 2023-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223547108.1U Active CN219072905U (en) | 2022-12-20 | 2022-12-20 | Acrolein synthesis oxidation reactor |
Country Status (1)
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| CN (1) | CN219072905U (en) |
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2022
- 2022-12-20 CN CN202223547108.1U patent/CN219072905U/en active Active
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