CN219596586U - Reactor for preparing high-concentration formaldehyde from methanol - Google Patents
Reactor for preparing high-concentration formaldehyde from methanol Download PDFInfo
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- CN219596586U CN219596586U CN202320585464.8U CN202320585464U CN219596586U CN 219596586 U CN219596586 U CN 219596586U CN 202320585464 U CN202320585464 U CN 202320585464U CN 219596586 U CN219596586 U CN 219596586U
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Abstract
A reactor for preparing high-concentration formaldehyde from methanol belongs to the technical field of formaldehyde preparation devices. The inside of the reactor cylinder is divided into a raw material air cavity, a heat conduction oil gas cavity and a lower heat insulation layer air cavity from top to bottom by an upper tube plate and a lower tube plate. A plurality of catalyst filling pipes are arranged between the upper pipe plate and the lower pipe plate, the upper ends of the catalyst filling pipes are provided with inverted trapezoid openings, and the inverted trapezoid openings act on the inclined plane of the upper pipe plate. The reactor enlarges the area of the inlet of the catalyst filling pipe, reduces the upper surface area of the upper pipe plate, ensures that the raw material gas completely and rapidly and uniformly enters the catalyst filling pipe, and reduces the area of collision with the surface of the upper pipe plate. Meanwhile, the flow speed of the raw material gas in the reaction zone is improved, the situation that the gas state of the methanol is too long on the surface of the upper tube plate, the partial overhigh temperature of the reactor caused by the overhigh partial methanol content of the mixed gas is avoided, and meanwhile, the pressure difference of the reactor is reduced. The methanol reactor has high space utilization rate and high methanol conversion rate.
Description
Technical Field
The utility model relates to a reactor for preparing high-concentration formaldehyde from methanol, and belongs to the technical field of formaldehyde preparation devices.
Background
The formaldehyde prepared by methanol has silver method and iron-molybdenum method, and formaldehyde gas can be obtained by reacting mixed gas composed of methanol and air under the action of a catalyst. In the tubular reactor of the iron-molybdenum catalyst, raw material gas enters a raw material gas cavity of the reactor from an inlet of the reactor, then enters a catalyst filling pipe from the raw material gas cavity, contacts with the iron-molybdenum catalyst to perform oxidation reaction, and the reacted mixed gas enters a lower heat insulation layer gas cavity and is conveyed to a vaporizer, an absorption tower and the like from an outlet of the reactor. After the raw material gas enters the reactor, a part of the raw material gas enters the catalyst filling pipe to be contacted with the catalyst in the catalyst filling pipe to react, and a part of the raw material gas collides with the surface of the upper pipe plate to be retained, so that the raw material gas is unevenly mixed with the air, and after the raw material gas with uneven methanol content enters the catalyst filling pipe to be contacted with the catalyst, the heat released by the uneven methanol content reaction is more or less, so that the partial temperature of the reactor is higher or lower.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a reactor for preparing high-concentration formaldehyde from methanol, and the upper tube plate reaction tube orifice of the formaldehyde synthesis reactor is safer without effusion.
The utility model adopts the technical scheme that: the reactor for preparing high-concentration formaldehyde from methanol comprises a cylinder body arranged on a skirt, wherein the inside of the cylinder body is divided into a raw material air cavity, a heat-conducting oil-gas cavity and a heat-insulating layer air cavity from top to bottom by an upper tube plate and a lower tube plate; a plurality of catalyst filling pipes are arranged between the upper pipe plate and the lower pipe plate, the upper ends of the catalyst filling pipes are communicated with the raw material air cavity, and the lower ends of the catalyst filling pipes are communicated with the heat insulation layer air cavity;
the raw material air cavity is provided with a raw material air inlet, the bottom of the heat insulation layer air cavity is provided with a formaldehyde gas outlet, and the heat conduction oil air cavity is provided with a heat conduction oil inlet and a heat conduction oil outlet;
the upper end of the catalyst filling pipe is provided with an inverted trapezoid opening, the inverted trapezoid opening acts on an upper pipe plate inclined plane of the upper pipe plate, and the included angle between the upper pipe plate inclined plane and the horizontal plane is 30-45 degrees.
The lower end of the heat conduction oil gas cavity is provided with a heat conduction oil inlet, and the upper end of the heat conduction oil gas cavity is provided with a heat conduction oil outlet;
and the raw material air cavity is also provided with a safety discharge port.
The beneficial effects of the utility model are as follows: the inside of the reactor cylinder is divided into a raw material air cavity, a heat conduction oil gas cavity and a lower heat insulation layer air cavity from top to bottom by an upper tube plate and a lower tube plate. A plurality of catalyst filling pipes are arranged between the upper pipe plate and the lower pipe plate, inverted trapezoid openings are arranged at the upper ends of the catalyst filling pipes, the inverted trapezoid openings act on the inclined surface of the upper pipe plate, and the included angle between the inclined surface of the upper pipe plate and the horizontal plane is 30-45 degrees.
The reactor enlarges the area of the inlet of the catalyst filling pipe, reduces the surface area on the upper pipe plate, ensures that the raw material gas completely and rapidly and uniformly enters the catalyst filling pipe, and reduces the area of collision with the surface of the upper pipe plate. Meanwhile, the flow speed of the raw material gas in the reaction zone is improved, the situation that the gas state of the methanol is too long on the surface of the upper tube plate, the partial overhigh temperature of the reactor caused by the overhigh partial methanol content of the mixed gas is avoided, and meanwhile, the pressure difference of the reactor is reduced. The reactor has high space utilization rate, high methanol conversion rate, high efficiency and energy conservation.
Drawings
FIG. 1 is a schematic structural diagram of a reactor for preparing formaldehyde with high concentration from methanol.
Fig. 2 is an enlarged view of a in fig. 1.
In the figure: 1. the device comprises a cylinder body, 2, a skirt seat, 3, a raw material air inlet, 4, a formaldehyde gas outlet, 5, a safety discharge port, 6, an upper tube plate, 6a, an upper tube plate inclined plane, 7, a lower tube plate, 8, a raw material air cavity, 9, a heat insulation layer air cavity, 10, a catalyst filling pipe, 10a, an inverted trapezoid port, 11, a heat conduction oil gas cavity, 11a, a heat conduction oil inlet, 11b and a heat conduction oil outlet.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, the reactor for preparing high-concentration formaldehyde by oxidizing methanol comprises a cylinder 1, wherein the cylinder 1 is connected with a skirt 2, a feed gas inlet 3 and a formaldehyde gas outlet 4 are respectively arranged on the upper part and the lower part of the cylinder 1, an upper tube plate 6 and a lower tube plate 7 are arranged in the cylinder 1, the cylinder 1 is divided into an upper feed gas cavity 8, a heat conducting oil gas cavity 11 and a lower heat insulating layer gas cavity 9 by the upper tube plate and the lower tube plate, a plurality of catalyst filling pipes 10 penetrate through the upper tube plate 6 and the lower tube plate 7, the upper end and the lower end of each catalyst filling pipe 10 are respectively communicated with the upper feed gas cavity 8 and the lower heat insulating layer gas cavity 9, and a heat conducting oil inlet 11a and a heat conducting oil outlet 11b are arranged on the heat conducting oil gas cavity 11. The heat conducting oil inlet 11a is arranged on the cylinder body 1 at the position of the heat conducting oil air cavity 11 near the lower end, and the heat conducting oil outlet 11b is arranged on the upper tube plate 6.
The top of the raw material air cavity 8 on the cylinder body 1 is provided with a safety discharge port 5.
The catalyst loading tube 10 is loaded with an iron molybdenum catalyst. The upper tube sheet 6 interfaces with the catalyst loading tubes 10 to form an inverted trapezoidal shaped orifice 10a which acts on the upper tube sheet inclined surface 6a to reduce the upper tube sheet surface area and increase the amount of feed gas entering the catalyst loading tubes. The area of the inlet of the catalyst filling pipe is enlarged, the upper surface area of the upper pipe plate is reduced, the raw material gas is enabled to enter the catalyst filling pipe completely and rapidly, and the area of collision with the surface of the upper pipe plate is reduced. Meanwhile, the flow speed of the raw material gas in the reaction zone is improved, the situation that the gas state of the methanol is too long on the surface of the upper tube plate, the partial overhigh temperature of the reactor caused by the overhigh partial methanol content of the mixed gas is avoided, and meanwhile, the pressure difference of the reactor is reduced.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (3)
1. The utility model provides a reactor of methyl alcohol preparation high concentration formaldehyde, it includes barrel (1) that sets up on skirt (2), its characterized in that: the inside of the cylinder body (1) is divided into a raw material air cavity (8), a heat conduction oil gas cavity (11) and a heat insulation layer air cavity (9) from top to bottom by an upper tube plate (6) and a lower tube plate (7); a plurality of catalyst filling pipes (10) are arranged between the upper tube plate (6) and the lower tube plate (7), the upper ends of the catalyst filling pipes (10) are communicated with the raw material air cavity (8), and the lower ends of the catalyst filling pipes are connected with the heat insulation layer air cavity (9);
the raw material air cavity (8) is provided with a raw material air inlet (3), the bottom of the heat insulation layer air cavity (9) is provided with a formaldehyde gas outlet (4), and the heat conduction oil air cavity (11) is provided with a heat conduction oil inlet (11 a) and a heat conduction oil outlet (11 b);
the upper end of the catalyst filling pipe (10) is provided with an inverted trapezoid opening (10 a), and the inverted trapezoid opening (10 a) acts on an upper pipe plate inclined surface (6 a) of the upper pipe plate (6); the included angle between the inclined plane (6 a) of the upper tube plate and the horizontal plane is 30-45 degrees.
2. The reactor for preparing formaldehyde with high concentration from methanol according to claim 1, wherein: the lower end of the heat conduction oil gas cavity (11) is provided with a heat conduction oil inlet (11 a), and the upper end of the heat conduction oil gas cavity is provided with a heat conduction oil outlet (11 b);
3. the reactor for preparing formaldehyde with high concentration from methanol according to claim 1, wherein: the raw material air cavity (8) is also provided with a safety discharge port (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320585464.8U CN219596586U (en) | 2023-03-23 | 2023-03-23 | Reactor for preparing high-concentration formaldehyde from methanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320585464.8U CN219596586U (en) | 2023-03-23 | 2023-03-23 | Reactor for preparing high-concentration formaldehyde from methanol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219596586U true CN219596586U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320585464.8U Active CN219596586U (en) | 2023-03-23 | 2023-03-23 | Reactor for preparing high-concentration formaldehyde from methanol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219596586U (en) |
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2023
- 2023-03-23 CN CN202320585464.8U patent/CN219596586U/en active Active
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