Formaldehyde generation reactor with low-temperature pretreatment function
By designing a formaldehyde generation reactor with low-temperature pretreatment function and using a cooling mechanism to achieve uniform cooling, the problem of reduced methanol activity caused by high temperature was solved, and production costs were reduced.
Patent Information
- Application Number
- CN202422802671.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-18
AI Technical Summary
In the formaldehyde production process, high temperatures reduce the activity of methanol, requiring more methanol to be added, which increases costs.
Design a formaldehyde generation reactor with low-temperature pretreatment function. Through the cooperation of a cooling mechanism including an inlet valve pipe, a distribution plate, branch water pipes and nozzles, uniform cooling can be achieved to avoid the negative impact of high temperature on methanol activity.
This improved the efficiency of cooling water supply and cooling effect, avoided methanol waste, and reduced production costs.
Smart Images
Figure CN223530393U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of formaldehyde production technology, and in particular to a formaldehyde generation reactor with low-temperature pretreatment function. Background Technology
[0002] Formaldehyde is an important industrial chemical widely used in the manufacture of resins, plastics, coatings, textiles, etc. In industrial production, formaldehyde is usually produced industrially through the catalytic oxidation of methanol. The most common catalysts are silver or a mixture of iron and molybdenum or vanadium oxide. In the more commonly used FORMOX process, methanol and oxygen react at about 250-400°C in a mixture of iron oxide and molybdenum and / or vanadium to produce formaldehyde. However, the methanol synthesis reaction is an exothermic process, generating a large amount of heat during synthesis, especially under conditions of vigorous reaction or high exothermic activity. It is difficult to quickly reduce the temperature by relying solely on the internal temperature control mechanism of the reactor. If the reactor cannot be cooled in time, the high temperature will reduce the equilibrium constant of methanol, thus reducing the activity of methanol. With reduced methanol activity, more methanol needs to be added to produce formaldehyde, resulting in methanol waste and increased formaldehyde production costs. Therefore, this invention addresses the above problems. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a formaldehyde generation reactor with a low-temperature pretreatment function.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A formaldehyde generation reactor with low-temperature pretreatment function includes a shell, a top cover fixed to the top of the shell via a flange, the top surface of the top cover being hemispherical, an installation hole being provided in the center of the top surface of the top cover, a cooling mechanism being installed in the installation hole, four support legs being evenly fixed to the bottom of the shell, and fixing openings being provided on the upper part of one side and the lower part of the other side of the shell, and a reaction assembly being installed inside the shell through the fixing holes.
[0006] Preferably, a drain outlet is provided on one side of the bottom surface of the equipment housing, and a drain valve pipe is installed inside the drain outlet.
[0007] Preferably, the reaction assembly includes a reactor, an inlet pipe, and an outlet pipe. The reactor is located in the middle of the equipment shell. One end of the inlet pipe is connected to the lower part of one side of the reactor, and the outer end of the inlet pipe extends out from one of the fixed openings in the equipment shell. One end of the outlet pipe is connected to the upper part of the other side of the reactor, and the other end of the outlet pipe extends out from another fixed opening in the equipment shell.
[0008] Preferably, the cooling mechanism includes a water inlet assembly, a spray assembly, and a water outlet assembly. The water inlet assembly consists of a water inlet valve pipe and a distribution plate. The top end of the water inlet valve pipe extends from the mounting hole in the top cover, and the bottom end of the water inlet valve pipe is connected to and installed with the distribution plate.
[0009] Preferably, the spraying assembly includes branch pipes and nozzles. The branch pipes are evenly distributed around the periphery of the reactor. The top of the branch pipes is connected to the diversion plate. Multiple nozzles are vertically and equidistantly installed on the inner side of the branch pipe.
[0010] Preferably, the water outlet assembly includes a water outlet valve pipe and a collector plate. The collector plate is installed at the bottom of multiple branch water pipes. The bottom collector plate is connected to the water outlet valve pipe, and the bottom end of the water outlet valve pipe is sealed and penetrates the outside of the equipment housing.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model facilitates the transportation of cooling water by cooperating with the inlet valve pipe and the outlet valve pipe, thereby improving efficiency and achieving the ability to supply a sufficient amount of cooling water. Furthermore, by cooperating with the branch pipe and the nozzle, it facilitates the output of a large area of water mist, thereby improving efficiency and achieving the ability to cool evenly, ultimately solving the problem of methanol waste caused by excessively high temperatures. Attached Figure Description
[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this utility model;
[0014] Figure 2 This is a front view schematic diagram of the overall structure proposed in this utility model;
[0015] Figure 3 This is a three-dimensional structural diagram of the reactor and branch pipe proposed in this utility model;
[0016] Figure 4 This is a three-dimensional structural diagram of the branch pipe and nozzle proposed in this utility model;
[0017] Figure 5 This is a schematic diagram of the overall structure proposed in this utility model.
[0018] The numbers in the diagram are: 1. Equipment shell; 2. Top cover; 3. Support leg; 4. Drain valve pipe; 5. Reactor; 6. Air inlet pipe; 7. Air outlet pipe; 8. Branch water pipe; 9. Diverter plate; 10. Water inlet valve pipe; 11. Water outlet valve pipe; 12. Nozzle. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0020] Example: See Figure 1-5 This utility model discloses a formaldehyde generation reactor with low-temperature pretreatment function, comprising a shell 1, a top cover 2 fixed to the top of the shell 1 via a flange, the top surface of the top cover 2 being hemispherical, with a mounting hole in the center of the top surface of the top cover 2, into which a cooling mechanism is installed; four support legs 3 evenly fixed around the bottom of the shell 1; fixing openings on the upper part of one side and the lower part of the other side of the shell 1; reaction components installed inside the shell 1 through the fixing holes; and a drain outlet on one side of the bottom of the shell 1, into which a drain valve is installed. The water valve pipe 4 is modularly designed to facilitate equipment maintenance and upgrades. The reaction assembly includes a reactor 5, an inlet pipe 6, and an outlet pipe 7. The reactor 5 is located in the middle of the equipment shell 1. One end of the inlet pipe 6 is connected to the lower part of one side of the reactor 5, and the outer end of the inlet pipe 6 passes through one of the fixed ports of the equipment shell 1. One end of the outlet pipe 7 is connected to the upper part of the other side of the reactor 5, and the other end of the outlet pipe 7 passes through another fixed port of the equipment shell 1. The cooperation between the inlet pipe 6 and the outlet pipe 7 facilitates the connection of other system mechanisms and improves practicality.
[0021] In this invention, the cooling mechanism includes a water inlet assembly, a spraying assembly, and a water outlet assembly. The water inlet assembly consists of an inlet valve pipe 10 and a distribution plate 9. The top end of the inlet valve pipe 10 extends from the mounting hole in the top cover 2, and the bottom end of the inlet valve pipe 10 is connected to the distribution plate 9. The cooperation between the inlet valve pipe 10 and the distribution plate 9 facilitates the dispersion of water flow and improves practicality. The spraying assembly includes branch pipes 8 and nozzles 12. The branch pipes 8 are evenly distributed around the periphery of the reactor 5, and the top ends of the branch pipes 8 connect to the distribution plate. The branch pipes 8 are connected, and multiple nozzles 12 are vertically and equidistantly installed on the inner side of the pipe body. Through the cooperation of the branch pipes 8 and the nozzles 12, it is easy to output a large area of water mist, which improves efficiency. The water outlet assembly includes a water outlet valve pipe 11 and a flow collector plate. The flow collector plate is installed at the bottom of the multiple branch pipes 8. The bottom flow collector plate is connected to the water outlet valve pipe 11. The bottom end of the water outlet valve pipe 11 is sealed and penetrates through the outside of the equipment shell 1. Through the cooperation of the water outlet valve pipe 11 and the flow collector plate 9, it is easy to collect water flow, which improves practicality.
[0022] Working principle: When using this utility model, the equipment is first set up in the whole system. After high temperature ethanol mixed gas is introduced into the inlet pipe 6, the gas will react with a series of media such as catalyst in the reactor 5 to form formaldehyde mixed gas, and then enter the next process through the outlet pipe 7. During the reaction, cooling water is continuously introduced into the water inlet valve pipe 10. The cooling water enters each branch water pipe 8 through the action of the distribution plate 9. Then, part of the cooling water is sprayed out from the nozzle 12 to form water mist, which absorbs the heat of the reactor 5. The other part is collected in the outlet water valve pipe 11 through the action of the collection plate and enters other circulation equipment. After the water mist and steam condense, they gather at the bottom of the equipment shell 1 and are discharged outside the equipment through the drain valve pipe 4.
[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A formaldehyde generation reactor with low-temperature pretreatment function, comprising a shell (1), characterized in that: The top of the equipment housing (1) is fixed to a top cover (2) by a flange. The top surface of the top cover (2) is hemispherical. An installation hole is opened in the middle of the top surface of the top cover (2). A cooling mechanism is installed in the installation hole. Four support feet (3) are evenly fixed around the bottom surface of the equipment housing (1). Fixing openings are opened on the upper part of one side and the lower part of the other side of the equipment housing (1). A reaction component is installed inside the equipment housing (1) through the fixing hole.
2. The formaldehyde generation reactor with low-temperature pretreatment function according to claim 1, characterized in that: A drain outlet is provided on one side of the bottom surface of the equipment housing (1), and a drain valve pipe (4) is installed inside the drain outlet.
3. The formaldehyde generation reactor with low-temperature pretreatment function according to claim 1, characterized in that: The reaction assembly includes a reactor (5), an inlet pipe (6), and an outlet pipe (7). The reactor (5) is located in the middle of the equipment shell (1). One end of the inlet pipe (6) is connected to the lower part of one side of the reactor (5), and the outer end of the inlet pipe (6) passes through one of the fixed ports of the equipment shell (1). One end of the outlet pipe (7) is connected to the upper part of the other side of the reactor (5), and the other end of the outlet pipe (7) passes through another fixed port of the equipment shell (1).
4. A formaldehyde generation reactor with low-temperature pretreatment function according to claim 1, characterized in that: The cooling mechanism includes a water inlet assembly, a spray assembly and a water outlet assembly. The water inlet assembly consists of a water inlet valve pipe (10) and a diverter plate (9). The top end of the water inlet valve pipe (10) extends out from the mounting hole of the top cover (2), and the bottom end of the water inlet valve pipe (10) is connected to the diverter plate (9).
5. A formaldehyde generation reactor with low-temperature pretreatment function according to claim 4, characterized in that: The spraying assembly includes branch pipes (8) and nozzles (12). The branch pipes (8) are evenly arranged around the reactor (5). The top of the branch pipes (8) is connected to the diversion plate (9). Multiple nozzles (12) are vertically and equidistantly installed on the inner side of the branch pipes (8).
6. A formaldehyde generation reactor with low-temperature pretreatment function according to claim 4, characterized in that: The water outlet assembly includes a water outlet valve pipe (11) and a collection plate. The collection plate is installed at the bottom of multiple branch water pipes (8). The bottom collection plate is connected to the water outlet valve pipe (11). The bottom end of the water outlet valve pipe (11) is sealed and penetrates the outside of the equipment housing (1).