Formaldehyde oxidation reaction apparatus

Abstract

The utility model discloses a formaldehyde oxidation reaction device belongs to formaldehyde oxidation reaction device's technical field, it includes: inner bag and lid, the inner bag is slidably equipped with piston plate no.

Description

Technical Field

[0001] This utility model relates to the technical field of formaldehyde oxidation reaction device, and specifically to a formaldehyde oxidation reaction device. Background Technology

[0002] Formaldehyde, also known as formalin, has a wide range of uses. It is a popular chemical product with a simple production process and abundant raw material supply. Industrially, it is mainly produced by methanol oxidation and direct natural gas oxidation. The main process flow is as follows: methanol is pumped to the oxidizer, and then sent to the methanol evaporator through a rotor flow meter. Air is blown in from the bottom of the evaporator to bubble the methanol gas. After the methanol is evaporated, a certain amount of water vapor is added to form a three-way gas mixture, which enters the oxidizer for reaction after passing through a heat exchanger and filter.

[0003] Existing formaldehyde oxidation reaction devices generally inject the raw materials directly into the inner liner. However, due to the slow mixing rate of various gases, it is difficult to completely extract the finished product from the inner liner. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a formaldehyde oxidation reaction device that can quickly complete the mixing of raw materials and discharge almost all of the finished product from the inner liner.

[0005] To solve the above problems, this utility model provides a formaldehyde oxidation reaction device, including: an inner liner and a lid. A piston plate 1 is slidably installed in the inner liner. A plurality of connection holes are equally spaced on the piston plate 1, and the two openings of each connection hole are flared. A piston plate 2 is slidably installed in the connection holes. A limiting mechanism is provided on the piston plate 2 for constraining and limiting the piston plate 2.

[0006] The cover is located on the top side of the inner liner. The cover is equipped with a driving mechanism for driving the piston plate to slide up and down in the inner liner. An electrically controlled valve is fixedly installed through the cover, and the interior of the electrically controlled valve is connected to the interior of the inner liner.

[0007] Preferably, a soft pad is fixedly installed on the bottom side of the lid, and the outer peripheral wall of the soft pad is in contact with the inner wall of the inner liner. The bottom side of the soft pad is sloped, and the bottom opening of the electrically controlled valve is located at the highest point of the slope of the soft pad.

[0008] Preferably, the electrically controlled valve is located on the outer periphery of the drive mechanism, and the end of the electrically controlled valve with its bottom opening away from the drive mechanism is located directly above the inner ring edge of the top opening of the inner liner.

[0009] Preferably, the limiting mechanism includes a guide rod that slides through the center of the corresponding piston plate two. Both ends of the guide rod are fixedly equipped with mesh plates, and the outer peripheral wall of each mesh plate is fixedly connected to the inner wall of the corresponding connecting hole. A spring is provided between the piston plate two and the corresponding mesh plate, and both ends of the spring are fixedly connected to the corresponding mesh plate and the corresponding piston plate two, respectively.

[0010] Preferably, the mesh plate has a plurality of mesh holes, all of which are arranged at an angle and adjacent mesh holes are arranged symmetrically.

[0011] Preferably, the driving mechanism includes a driver fixedly mounted on the top side of the cover, a threaded rod threaded through the center of the piston plate, the bottom end of the threaded rod being located between the bottom side of the piston plate and the inner wall of the inner liner, the driving end of the driver being inserted into the cover and fixedly connected to the top end of the threaded rod, and the top end of the threaded rod being rotatably connected to the cover.

[0012] This utility model has the following beneficial effects:

[0013] When this improved formaldehyde oxidation reaction device is in use, the raw materials are repeatedly compressed in the high-pressure chamber and repeatedly diffused in the negative-pressure chamber to achieve rapid mixing. The mixing rate is fast, and after the raw material oxidation reaction is completed and the finished product is formed, the finished product is gradually pushed into the electrically controlled valve for discharge by gradually reducing the space at the top of the inner liner. This allows almost all the finished product in the inner liner to be discharged. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This is a perspective view of the inner liner and threaded rod of this utility model;

[0017] Figure 3 This is a front view of the internal structure of the inner liner and lid of this utility model;

[0018] Figure 4 This is a perspective view of the internal structure of the piston plate of this utility model;

[0019] Figure 5 This is a perspective view of the internal structure of the piston plate and mesh plate of this utility model.

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Inner liner; 2. Lid; 3. Limiting mechanism; 31. Guide rod; 32. Mesh plate; 33. Spring; 34. Mesh hole; 4. Drive mechanism; 41. Driver; 42. Threaded rod; 5. Piston plate one; 6. Connecting hole; 7. Piston plate two; 8. Electrically controlled valve; 9. Soft pad. Detailed Implementation

[0022] In the description of this utility model, it should 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] See also Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to an embodiment of the present invention, a formaldehyde oxidation reaction device is provided, including: an inner liner 1 and a cover 2. A piston plate 5 is slidably installed inside the inner liner 1. A plurality of connecting holes 6 are equally spaced on the piston plate 5, and the two openings of each connecting hole 6 are flared. A piston plate 7 is slidably installed inside the connecting holes 6. A limiting mechanism 3 is provided on the piston plate 7 for constraining and limiting the piston plate 7.

[0027] The cover 2 is located on the top side of the inner liner 1. The cover 2 is equipped with a drive mechanism 4 for driving the piston plate to slide up and down in the inner liner 1. An electric control valve 8 is fixedly installed through the cover 2, and the interior of the electric control valve 8 is connected to the interior of the inner liner 1.

[0028] In this embodiment (please refer to...), Figure 1 and Figure 2 As shown, the inner liner 1 is fixedly installed inside the existing formaldehyde oxidation reactor body, and the cover 2 is the same as the cover 2 of the existing formaldehyde oxidation reactor body. The cover 2 is fixed to the top opening of the formaldehyde oxidation reactor body by bolts, and is used to seal the top opening of the inner liner 1. Please refer to... Figure 2 and Figure 3 As shown, an interface is fixedly installed at the center of the bottom of the inner liner 1, and the interface is connected to the discharge belt end of the formaldehyde oxidation reactor body through a pipe. When using this improved formaldehyde oxidation reactor, please refer to... Figure 2 As shown, after the raw material is injected into the inner liner 1, the drive mechanism 4 drives the piston plate 5 to slide up and down in the inner liner 1, thereby forming a high-pressure chamber at the top or bottom of the inner liner 1. When the pressure difference on both sides of the piston plate 5 reaches the threshold, the piston plate 7 is subjected to a downward or upward thrust of a corresponding magnitude. Due to the constraint of the limiting mechanism 3 on the piston plate 7, the piston plate 7 slides down or up in a linear trajectory. When the piston plate 7 moves into the flared opening of the connecting hole 6, the raw material at the top or bottom of the inner cavity passes through the gap between the piston plate 7 and the inner wall of the flared opening of the connecting hole 6 and the connecting hole 6, and flows over the piston plate into the bottom or top of the inner liner 1. When the raw material passes over the piston plate 5, it flows into a negative pressure chamber. Since the original gas molecule density in the negative pressure chamber is low, the collision resistance of the newly injected gas molecules is reduced, and the mean free path becomes longer, thereby accelerating diffusion. That is, the raw material diffuses rapidly in the negative pressure chamber. This repetition can accelerate the mixing of the raw material.

[0029] After the raw materials in the device complete the oxidation reaction to form the finished product, the drive mechanism 4 drives the piston plate 5 to move to the bottom of the inner liner 1 until the bottom side of the piston plate 5 touches the inner bottom wall of the inner liner 1. At this time, almost all the raw materials in the inner liner 1 pass over the piston plate 5 and move to the top side of the piston plate 5. Then the electric control valve 8 is opened (the top of the electric control valve 8 is connected to the inlet of the formaldehyde condenser through a pipe). The drive mechanism 4 drives the piston plate 5 to move slowly upward, gradually pushing the finished product in the inner liner 1 into the electric control valve 8, and the finished product is introduced into the formaldehyde condenser through the pipe to complete the condensation treatment of the finished product. At the same time, the formaldehyde oxidation reaction device simultaneously injects raw materials into the bottom of the inner liner 1 so that a large pressure difference is not formed on both sides of the piston plate 5, causing the finished product on the top side of the piston plate 5 to flow through the connecting hole 6 to the bottom of the inner liner 1.

[0030] In summary, when this improved formaldehyde oxidation reaction device is in use, the raw materials are repeatedly compressed in the high-pressure chamber and repeatedly diffused in the negative-pressure chamber, so that the raw materials are mixed quickly and the mixing rate is fast. After the raw material oxidation reaction is completed and the finished product is formed, the finished product is gradually pushed into the electrically controlled valve 8 for discharge by gradually reducing the space at the top of the inner liner 1, so that almost all the finished product in the inner liner 1 can be discharged.

[0031] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a soft pad 9 is fixedly installed on the bottom side of the cover 2, and the outer peripheral wall of the soft pad 9 is in contact with the inner wall of the inner liner 1. The bottom side of the soft pad 9 is set in a sloping shape, and the bottom opening of the electric control valve 8 is located at the highest point of the sloping surface of the soft pad 9.

[0032] In this embodiment, please refer to Figure 3 As shown, (the threaded rod 42 rotates through the soft pad 9), when the piston plate 5 pushes the finished product in the inner cavity into the electrically controlled three-way valve, as the distance between the piston plate 5 and the soft pad 9 decreases, the lowest point of the soft pad 9 will first contact the top side of the piston plate 5. Then, as the soft pad 9 contracts and deforms, the bottom side of the soft pad 9 will gradually and completely fit with the top side of the piston plate 5, so as to push almost all the finished product in the inner cavity into the electrically controlled valve 8, which can greatly reduce the residue of finished product in the inner liner 1.

[0033] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the electrically controlled valve 8 is located on the outer periphery of the drive mechanism 4, and the end of the bottom opening of the electrically controlled valve 8 that is away from the drive mechanism 4 is located directly above the inner ring edge of the top opening of the inner liner 1.

[0034] In this embodiment, please refer to Figure 2As shown, the position of the bottom opening of the electric control valve 8 and the inner ring edge of the top opening of the inner liner 1 is set so that the top side of the piston plate 5 will not completely block the bottom opening of the electric control valve 8 before the top side of the piston plate 5 and the soft pad 9 are fully attached.

[0035] In a further preferred embodiment of this utility model, such as Figure 3 , Figure 4 and Figure 5 As shown, the limiting mechanism 3 includes a guide rod 31, which slides through the center of the corresponding piston plate 7. Both ends of the guide rod 31 are fixedly mounted with mesh plates 32, and the outer peripheral wall of each mesh plate 32 is fixedly connected to the inner wall of the corresponding connecting hole 6. A spring 33 is provided between the piston plate 7 and the corresponding mesh plate 32, and both ends of the spring 33 are fixedly connected to the corresponding mesh plate 32 and the corresponding piston plate 7, respectively.

[0036] In this embodiment, please refer to Figure 3 , Figure 4 and Figure 5 As shown, when the piston plate 7 slides within the connecting hole 6, due to the mutual contact between the piston plate 7 and the guide rod 31 (a sealing ring is installed inside the piston plate 7 to seal the gap between the guide rod 31 and the piston plate 7), the piston plate 7 moves in a linear trajectory in the up and down direction within the connecting hole 6. This prevents the piston plate 7 from tilting or shifting its position, which would cause a high-intensity contact between the piston plate 7 and the inner wall of the connecting hole 6, resulting in damage to the piston plate 7 and reducing the service life of the device.

[0037] When the thrust on piston plate 27 is greater than the driving force of spring 33 on piston plate 27 (the driving force of spring 33 on piston plate 27 is the thrust or pull force applied by spring 33 on both sides of piston plate 27), piston plate 27 moves up or down until piston plate 27 moves into the flared opening of connecting hole 6.

[0038] When the thrust on piston plate 2 7 is less than the elastic driving force on piston plate, spring 33 drives piston plate 2 7 to reset and slide until piston plate 2 7 moves to the middle position of connection hole 6, so as to automatically complete the opening or sealing of connection hole 6. The device has a high degree of automation.

[0039] In a further preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, a number of mesh holes 34 are distributed on the mesh plate 32. All mesh holes 34 are arranged at an angle, and two adjacent mesh holes 34 are arranged symmetrically.

[0040] In this embodiment, please refer to Figure 4 and Figure 5As shown, during the process of the raw material flowing into the connecting hole 6, it needs to pass through the mesh hole 34 on the mesh plate 32. Since the mesh hole 34 is tilted relative to each other, the raw material will impact each other during the process of being discharged from the mesh hole 34, so as to accelerate the mixing of the raw material.

[0041] When the raw materials flow out from the connecting hole 6, they also need to pass through the mesh 34 to collide and impact with each other again, further accelerating the mixing of the raw materials.

[0042] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the drive mechanism 4 includes a driver 41, which is fixedly mounted on the top side of the cover 2. A threaded rod 42 is threaded through the center of the piston plate 5, and the bottom end of the threaded rod 42 is located between the bottom side of the piston plate 5 and the inner wall of the inner liner 1. The drive end of the driver 41 is inserted into the cover 2 and fixedly connected to the top end of the threaded rod 42. The top end of the threaded rod 42 is rotatably connected to the cover 2.

[0043] In this embodiment, (the driver 41 mainly consists of a housing, a motor, and a gear transmission mechanism), please refer to... Figure 3 As shown, after the raw material is injected into the inner liner 1, the driver 41 drives the threaded rod 42 to rotate in the forward or reverse direction (a sealing ring is installed inside the plate wall of the cover 2 to seal the gap between the threaded rod 42 and the cover 2), thereby driving the piston plate 5 to move up or down. The driver 41 and the electric control valve 8 can be intelligently controlled by the control host of the formaldehyde oxidation reaction device, and the device has a high degree of automation.

[0044] It should be noted that two guide rods are stacked on the outer periphery of the threaded rod 42, and the guide rods slide through the piston plate 5. The bottom end of the guide rod is fixedly connected to the inner bottom wall of the inner liner 1. A sealing ring 2 is installed inside the wall of the piston plate 5 to seal the gap between the piston plate 5 and the guide rod.

[0045] Working principle: When this improved formaldehyde oxidation reaction device is in use, the drive mechanism 4 drives the piston plate 5 to slide up and down in the inner liner 1, thereby repeatedly forming a high pressure chamber and a negative pressure chamber between the top and bottom of the inner liner 1. This causes the raw materials to flow back and forth in the high pressure chamber and the negative pressure chamber. Through the repeated compression of the raw materials in the high pressure chamber and the repeated diffusion of the raw materials in the negative pressure chamber, the raw materials are quickly mixed.

[0046] After the raw material oxidation reaction is completed and the finished product is formed, the space at the top of the inner liner 1 is gradually reduced by the upward movement of the piston plate 5, thereby gradually pushing almost all the finished product in the inner liner 1 into the electrically controlled valve 8 for discharge.

[0047] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A device for the oxidation of formaldehyde, characterized in that include: The inner liner (1) and the lid (2) are provided. A piston plate (5) is slidably installed inside the inner liner (1). Several connecting holes (6) are equally spaced on the piston plate (5), and the two openings of each connecting hole (6) are flared. A piston plate (7) is slidably installed inside the connecting hole (6). A limiting mechanism (3) is provided on the piston plate (7) for constraining and limiting the piston plate (7). The cover (2) is located on the top side of the inner liner (1). The cover (2) is provided with a drive mechanism (4) for driving the piston plate to slide up and down in the inner liner (1). An electric control valve (8) is fixedly installed on the cover (2), and the interior of the electric control valve (8) is connected to the interior of the inner liner (1).

2. A device for the oxidation of formaldehyde according to claim 1, characterized in that: The bottom side of the cover (2) is fixedly equipped with a soft pad (9), and the outer peripheral wall of the soft pad (9) is in contact with the inner wall of the inner liner (1). The bottom side of the soft pad (9) is set in an inclined shape, and the bottom opening of the electric control valve (8) is located at the highest point of the inclined surface of the soft pad (9).

3. A device for the oxidation of formaldehyde according to claim 2, characterized in that: The electrically controlled valve (8) is located on the outer periphery of the drive mechanism (4), and the end of the bottom opening of the electrically controlled valve (8) away from the drive mechanism (4) is located directly above the inner ring edge of the top opening of the inner liner (1).

4. A formaldehyde oxidation reaction apparatus according to claim 3, characterized by: The limiting mechanism (3) includes a guide rod (31) which slides through the center of the corresponding piston plate (7). Both ends of the guide rod (31) are fixedly equipped with mesh plates (32), and the outer peripheral wall of each mesh plate (32) is fixedly connected to the inner wall of the corresponding connecting hole (6). A spring (33) is provided between the piston plate (7) and the corresponding mesh plate (32), and both ends of the spring (33) are fixedly connected to the corresponding mesh plate (32) and the corresponding piston plate (7) respectively.

5. A formaldehyde oxidation reaction apparatus according to claim 4, characterized by: The mesh plate (32) has a plurality of mesh holes (34) distributed on it. The plurality of mesh holes (34) are all arranged at an angle, and two adjacent mesh holes (34) are arranged symmetrically.

6. A formaldehyde oxidation reaction apparatus according to claim 5, characterized by: The drive mechanism (4) includes a driver (41), which is fixedly mounted on the top side of the cover (2). A threaded rod (42) is threaded through the center of the piston plate (5), and the bottom end of the threaded rod (42) is located between the bottom side of the piston plate (5) and the inner wall of the inner liner (1). The drive end of the driver (41) is inserted into the cover (2) and fixedly connected to the top end of the threaded rod (42). The top end of the threaded rod (42) is rotatably connected to the cover (2).

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