Formaldehyde preparation methanol oxygen-rich reaction equipment

Abstract

The present application relates to the technical field of formaldehyde preparation, and discloses a methanol oxygen-rich reaction equipment for preparing formaldehyde, which comprises a top cover, a servo motor is installed on the top of the top cover, and a rotating shaft is installed in the top cover. The hollow rod rotates in the rotating shaft, and the built-in rod rotates in the hollow rod. When the built-in rod and the hollow rod rotate, the stirring rod and the catalyst column pipe are driven to rotate, respectively. After the servo motor is started, the top bevel gear is driven to rotate, and after the transmission bevel gear is driven, the bottom bevel gear rotates in the direction opposite to that of the top bevel gear, thereby driving the stirring rod and the catalyst column pipe to uniformly stir the gas in the internal insulation reaction kettle in the opposite direction, so that the oxygen-rich gas and the methanol are fully mixed, the gas distribution is uniform, the reaction efficiency of the reaction equipment is improved, and the problem of low reaction efficiency caused by uneven gas mixing of the traditional reaction equipment is solved.

Description

Technical Field

[0001] This invention relates to the field of formaldehyde preparation technology, specifically to a methanol oxygen-enriched reaction apparatus for formaldehyde preparation. Background Technology

[0002] The core function of methanol oxygen-enriched reaction equipment is to chemically react methanol and gases with a higher oxygen concentration than ordinary air under specific conditions to efficiently produce formaldehyde. Oxygen enrichment improves production efficiency, reduces exhaust emissions, and optimizes the economics of the entire process.

[0003] Existing methanol oxygen-enriched reaction equipment for formaldehyde preparation typically employs a chemical reaction principle. It usually uses silver or iron-molybdenum oxide as a catalyst and selectively oxidizes gaseous methanol with oxygen at a temperature of 200-650℃ to produce formaldehyde and water.

[0004] The inventors of this application discovered in their research that the core defect of the aforementioned prior art is that, because it requires methanol and oxygen concentrations higher than those of ordinary air to participate in the reaction with the catalyst, when the gas distribution is uneven, the reaction efficiency of the gas in the reaction equipment is very low. Summary of the Invention

[0005] This invention provides a methanol oxygen-enriched reaction device for formaldehyde preparation, which solves the problem of uneven gas distribution inside the reaction device and improves the reaction efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a methanol oxygen-enriched reaction device for formaldehyde preparation, comprising a top cover, a servo motor mounted on the top of the top cover, a rotating shaft mounted inside the top cover, a hollow rod rotatably connected inside the rotating shaft, an internal rod rotatably connected inside the hollow rod, a top bevel gear fixedly connected to the top of the internal rod, the top bevel gear fixedly connected to the output end of the servo motor, a bottom bevel gear fixedly connected to the outside of the hollow rod, a fixing frame fixedly connected inside the top cover, a transmission bevel gear rotatably connected to one side of the fixing frame, the transmission bevel gear being rotatably connected to the top bevel gear and the bottom bevel gear respectively, a bottom frame fixedly connected to the bottom of the internal rod, a stirring rod fixedly connected to the top of the bottom frame, an external block fixedly connected to the outside of the hollow rod, a fixing body fixedly connected to the outside of the external block, and a mounting frame fixedly connected to one side of the fixing body.

[0007] By adopting the above technical solution, the mixing efficiency of methanol and oxygen-enriched air is improved, resulting in a more uniform gas distribution, increased reaction efficiency of the mixed gas, and improved formaldehyde preparation efficiency. This effectively avoids the phenomenon of uneven gas mixing in traditional reaction equipment and solves the problem of low reaction efficiency.

[0008] Preferably, the mounting bracket has an internal sliding block, one side of which is fixedly connected to a plug-in block. The bottom of the internal sliding block has a mounting screw hole, and the bottom of the internal sliding block is threadedly connected to a catalyst tube. The fixed body has a second telescopic rod, the top of which is fixedly connected to a plug-in block. The bottom of the plug-in block is fixedly connected to a second spring through the fixed body. Push blocks are fixedly connected to both sides of the plug-in block, and the push blocks are slidably connected to the fixed body.

[0009] Preferably, the built-in rod is externally fixedly connected to a bottom ratchet, and the bottom of the external block is fixedly connected to a first telescopic rod.

[0010] Preferably, a bottom ring is fixedly connected to the bottom of the first telescopic rod, the bottom ring is slidably connected to the outside of the hollow rod, and a first spring is fixedly connected to the top of the bottom ring through the bottom of the outer block.

[0011] Preferably, an outer protective shell is fixedly connected to the top of the bottom ring, and an inner protective shell is fixedly connected to the bottom of the outer block, with the inner protective shell and the outer protective shell being slidably connected.

[0012] Preferably, a top ratchet is fixedly connected to the bottom of the bottom ring, and a locking rod is fixedly connected to the outside of the bottom ring, with the locking rod slidably connected to the fixing body.

[0013] Preferably, a control valve is fixedly connected to the outside of the top cover, the output end of the control valve passes through the bottom of the top cover, and a heat-insulating reaction vessel is provided at the bottom of the top cover.

[0014] Preferably, a fixing bolt is provided between the top cover and the heat-insulated reactor, and a drain valve is installed at the bottom of the heat-insulated reactor.

[0015] Preferably, the bottom of the heat-insulating reactor is fixedly connected to a supporting leg, and a heating tube is wound around the inside of the heat-insulating reactor.

[0016] Preferably, one end of the heating tube is equipped with a liquid inlet, and the other end of the heating tube is connected to a liquid outlet.

[0017] By adopting the above technical solutions, the disassembly and installation of the catalyst tubes are made more convenient, facilitating their use and replacement. At the same time, the locking structure makes the catalyst tubes more stable during equipment operation.

[0018] This invention provides a methanol oxygen-enriched reaction apparatus for formaldehyde preparation. It has the following beneficial effects: 1. This invention features a hollow rod rotating inside a rotating shaft, and an internal rod rotating inside the hollow rod. When the hollow rod and internal rod rotate, they respectively drive the stirring rod and catalyst tubes to rotate. After the servo motor is started, the top bevel gear is driven to rotate, and through the transmission bevel gear, the bottom bevel gear rotates in the opposite direction to the top bevel gear. This, in turn, drives the stirring rod and catalyst tubes to uniformly stir the gas inside the heat-insulating reactor in opposite directions, ensuring thorough mixing of oxygen and methanol and uniform gas distribution. This improves the reaction efficiency of the equipment and solves the problem of low reaction efficiency caused by uneven gas mixing in traditional reaction equipment.

[0019] 2. This invention uses an internal slider to install the catalyst tube, which facilitates the overall installation and disassembly of the catalyst tube. The internal slider slides inside the mounting frame and is limited by a plug-in block, allowing the catalyst tube to be easily installed with the equipment and easily disassembled and replaced. This solves the problem of inconvenient disassembly and replacement of catalyst tubes in traditional reaction equipment.

[0020] 3. This invention, by setting a ratchet structure, allows the bottom ratchet to lift the top ratchet after the built-in rod and hollow rod rotate, causing the locking rod to abut against the bottom of the insertion block. When the built-in rod and hollow rod stop rotating, the first spring pushes the top ratchet downward, so that the locking rod no longer abuts against the bottom of the insertion block. This effectively locks and fixes the inner slider when the device is started, preventing the inner slider from accidentally dislodging during device operation and increasing the stability of the device during operation. Attached Figure Description

[0021] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a schematic diagram of the top cover of the present invention; Figure 3 This is a cross-sectional view of the top cover of the present invention; Figure 4 This is a schematic diagram of the built-in rod of the present invention; Figure 5 This is a schematic diagram of the hollow rod of the present invention; Figure 6 This is a schematic diagram of the mounting bracket of the present invention; Figure 7 This is an enlarged view of point A in the present invention; Figure 8 This is an enlarged view of section B of the present invention; Figure 9 This is an enlarged view of point C in the present invention.

[0022] The components include: 1. Insulated reactor; 2. Top cover; 3. Servo motor; 4. Supporting feet; 5. Liquid inlet; 6. Liquid outlet; 7. Control valve; 8. Heating tube; 9. Drain valve; 10. Fixing bolts; 11. Top bevel gear; 12. Fixing frame; 13. Transmission bevel gear; 14. Bottom bevel gear; 15. Rotating shaft; 16. Internal rod; 17. Bottom ratchet; 18. Base frame; 19. Stirring rod; 20. Hollow core. 21. Rod; 22. Mounting bracket; 23. Inner slider; 24. Catalyst tube; 25. Insertion block; 26. Fixing body; 27. Outer block; 28. Inner protective shell; 29. ​​Outer protective shell; 30. Bottom ring; 31. Top ratchet; 32. Locking rod; 33. First telescopic rod; 34. First spring; 35. Insertion block; 36. Second telescopic rod; 37. Second spring; 38. Push block; 39. Mounting screw hole. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-9 This invention provides a methanol oxygen-enriched reaction device for formaldehyde preparation, including a top cover 2, a servo motor 3 mounted on the top of the top cover 2, a rotating shaft 15 mounted inside the top cover 2, a hollow rod 20 rotatably connected inside the rotating shaft 15, an internal rod 16 rotatably connected inside the hollow rod 20, a top bevel gear 11 fixedly connected to the top of the internal rod 16, the top bevel gear 11 fixedly connected to the output end of the servo motor 3, a bottom bevel gear 14 fixedly connected to the outside of the hollow rod 20, a fixing frame 12 fixedly connected inside the top cover 2, a transmission bevel gear 13 rotatably connected to one side of the fixing frame 12, the transmission bevel gear 13 being rotatably connected to the top bevel gear 11 and the bottom bevel gear 14 respectively, a bottom frame 18 fixedly connected to the bottom of the internal rod 16, a stirring rod 19 fixedly connected to the top of the bottom frame 18, an external block 26 fixedly connected to the outside of the hollow rod 20, a fixing body 25 fixedly connected to the outside of the external block 26, and a mounting frame 21 fixedly connected to one side of the fixing body 25.

[0025] Specifically, the hollow rod 20 can rotate inside the rotating shaft 15, and the built-in rod 16 rotates inside the hollow rod 20. After the servo motor 3 is started, the top bevel gear 11 rotates as a whole, and the transmission bevel gear 13 drives the bottom bevel gear 14 to rotate. This causes the top bevel gear 11 and the bottom bevel gear 14 to rotate in opposite directions, synchronously driving the built-in rod 16 and the hollow rod 20 to rotate in opposite directions. This further enables the stirring rod 19 to cooperate with the catalyst tubes 23 that are rotating in opposite directions to achieve a thorough mixing of methanol and oxygen, and increases the contact between the catalyst tubes 23 and the mixed gas.

[0026] like Figure 5 , Figure 8 and Figure 9 The mounting bracket 21 has an inner slider 22 that is slidably connected inside. A plug block 24 is fixedly connected to one side of the inner slider 22. The bottom of the inner slider 22 has a mounting screw hole 38. A catalyst tube 23 is threadedly connected to the bottom of the inner slider 22. The fixed body 25 has a second telescopic rod 35 that is fixedly connected inside. A plug block 34 is fixedly connected to the top of the second telescopic rod 35. A second spring 36 is fixedly connected to the bottom of the plug block 34 through the inside of the fixed body 25. Push blocks 37 are fixedly connected to both sides of the plug block 34. The push blocks 37 are slidably connected to the fixed body 25.

[0027] Specifically, the catalyst tube 23 can be threaded to the bottom of the inner slider 22 via the mounting screw hole 38, and the inner slider 22 can be slidably connected to the inside of the mounting bracket 21. The plug block 24 can abut against one side of the plug-in block 34, so that the plug-in block 34 is forcefully contracted into the inside of the fixed body 25. During this process, the second telescopic rod 35 and the second spring 36 are forcefully compressed until the plug-in block 34 is inserted into the bottom of the plug block 24, thereby limiting the inner slider 22. Similarly, after pressing the push block 37 to descend, the plug-in block 34 descends, making it easier for the inner slider 22 to disengage from the mounting bracket 21.

[0028] like Figure 2 , Figure 7 and Figure 8 The built-in rod 16 is externally fixedly connected to a bottom ratchet 17, and the bottom of the external block 26 is fixedly connected to a first telescopic rod 32. The bottom of the first telescopic rod 32 is fixedly connected to a bottom ring 29, which is slidably connected to the outside of the hollow rod 20. The top of the bottom ring 29 is fixedly connected to a first spring 33 through the bottom of the outer block 26. The top of the bottom ring 29 is fixedly connected to an outer protective shell 28, and the bottom of the outer block 26 is fixedly connected to an inner protective shell 27. The inner protective shell 27 and the outer protective shell 28 are slidably connected. The bottom of the bottom ring 29 is fixedly connected to the top ratchet 30, and the outside of the bottom ring 29 is fixedly connected to the locking rod 31, which is slidably connected to the fixed body 25. A control valve 7 is fixedly connected to the outside of the top cover 2. The output end of the control valve 7 passes through the bottom of the top cover 2. A heat-insulating reaction vessel 1 is installed at the bottom of the top cover 2. A fixing bolt 10 is provided between the top cover 2 and the heat-insulated reactor 1, and a drain valve 9 is installed at the bottom of the heat-insulated reactor 1; The bottom of the heat-insulated reactor 1 is fixedly connected to a support leg 4, and a heating tube 8 is wound inside the heat-insulated reactor 1; One end of the heating tube 8 is equipped with a liquid inlet 5, and the other end of the heating tube 8 is connected to a liquid outlet 6.

[0029] Specifically, during the start-up of the servo motor 3, the built-in rod 16 drives the bottom ratchet 17 to rotate, which in turn pushes the top ratchet 30 and the bottom ring 29 to rise. At the same time, the first telescopic rod 32 and the first spring 33 are compressed, and the locking rod 31 abuts against the bottom of the plug-in block 34, thereby locking the plug-in block 34 from moving. During this process, the built-in protective shell 27 slides against the outer protective shell 28, thereby protecting the internal structure from contact with the mixed gas. The entry of methanol and oxygen is controlled by the control valve 7, and after thorough mixing, they come into contact with the catalyst tube 23 to react and generate formaldehyde and water. The liquid is discharged by the drain valve 9, and the temperature is controlled by the heating tube 8.

[0030] Working process: The hollow rod 20 can rotate inside the rotating shaft 15, and the built-in rod 16 rotates inside the hollow rod 20. After the servo motor 3 is started, the top bevel gear 11 rotates as a whole, and the transmission bevel gear 13 drives the bottom bevel gear 14 to rotate. This causes the top bevel gear 11 and the bottom bevel gear 14 to rotate in opposite directions, synchronously driving the built-in rod 16 and the hollow rod 20 to rotate in opposite directions. This further enables the stirring rod 19 to cooperate with the catalyst tubes 23 that are rotating in opposite directions to achieve a thorough mixing of methanol and oxygen, and increases the contact between the catalyst tubes 23 and the mixed gas. The catalyst tube 23 can be threaded to the bottom of the inner slider 22 via the mounting screw hole 38, and the inner slider 22 can be slidably connected to the inside of the mounting bracket 21. The plug block 24 can abut against one side of the plug-in block 34, so that the plug-in block 34 is forcefully retracted into the inside of the fixed body 25. During this process, the second telescopic rod 35 and the second spring 36 are forcefully compressed until the plug-in block 34 is inserted into the bottom of the plug block 24, thereby limiting the inner slider 22. Similarly, after pressing the push block 37 to descend, the plug-in block 34 descends, making it easier for the inner slider 22 to disengage from the mounting bracket 21. During the start-up of the servo motor 3, the built-in rod 16 drives the bottom ratchet 17 to rotate, and the bottom ratchet 17 pushes the top ratchet 30 and the bottom ring 29 to rise. At the same time, the first telescopic rod 32 and the first spring 33 are compressed, and the locking rod 31 abuts against the bottom of the plug-in block 34, thereby locking the plug-in block 34 from moving. During this process, the built-in protective shell 27 slides against the outer protective shell 28, thereby protecting the internal structure from contact with the mixed gas. The entry of methanol and oxygen is controlled by the control valve 7, and after thorough mixing, they come into contact with the catalyst tube 23 to react and generate formaldehyde and water. The liquid is discharged by the drain valve 9, and the temperature is controlled by the heating tube 8.

Claims

1. A methanol oxygen-enriched reaction apparatus for formaldehyde preparation, comprising a top cover (2), characterized in that, A servo motor (3) is mounted on the top of the top cover (2). A rotating shaft (15) is installed inside the top cover (2). A hollow rod (20) is rotatably connected inside the rotating shaft (15). An internal rod (16) is rotatably connected inside the hollow rod (20). A top bevel gear (11) is fixedly connected to the top of the internal rod (16). The top bevel gear (11) is fixedly connected to the output end of the servo motor (3). A bottom bevel gear (14) is fixedly connected to the outside of the hollow rod (20). A fixing bracket (12) is fixedly connected inside the top cover (2). The fixed frame (12) is rotatably connected to a transmission bevel gear (13) on one side. The transmission bevel gear (13) is rotatably connected to the top bevel gear (11) and the bottom bevel gear (14) respectively. The bottom of the built-in rod (16) is fixedly connected to a bottom frame (18). The top of the bottom frame (18) is fixedly connected to a stirring rod (19). The hollow rod (20) is fixedly connected to an outer block (26). The outer block (26) is fixedly connected to a fixing body (25). The fixing body (25) is fixedly connected to a mounting frame (21) on one side.

2. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 1, characterized in that, The mounting bracket (21) has an inner slider (22) slidably connected inside. A plug block (24) is fixedly connected to one side of the inner slider (22). The bottom of the inner slider (22) has a mounting screw hole (38). The bottom of the inner slider (22) is threadedly connected to a catalyst tube (23). The fixed body (25) has a second telescopic rod (35) fixedly connected inside. The top of the second telescopic rod (35) is fixedly connected to a plug-in block (34). The bottom of the plug-in block (34) is fixedly connected to a second spring (36) through the inside of the fixed body (25). Push blocks (37) are fixedly connected to both sides of the plug-in block (34). The push blocks (37) are slidably connected to the fixed body (25).

3. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 1, characterized in that, The built-in rod (16) is externally fixedly connected to a bottom ratchet (17), and the bottom of the external block (26) is fixedly connected to a first telescopic rod (32).

4. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 3, characterized in that, The bottom of the first telescopic rod (32) is fixedly connected to a bottom ring (29), which is slidably connected to the outside of the hollow rod (20). The top of the bottom ring (29) is fixedly connected to a first spring (33) through the bottom of the outer block (26).

5. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 4, characterized in that, The top of the bottom ring (29) is fixedly connected to an outer protective shell (28), and the bottom of the outer block (26) is fixedly connected to an inner protective shell (27). The inner protective shell (27) and the outer protective shell (28) are slidably connected.

6. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 4, characterized in that, The bottom of the bottom ring (29) is fixedly connected to a top ratchet (30), and the outside of the bottom ring (29) is fixedly connected to a locking rod (31). The locking rod (31) is slidably connected to the fixed body (25).

7. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 1, characterized in that, A control valve (7) is fixedly connected to the outside of the top cover (2). The output end of the control valve (7) passes through the bottom of the top cover (2). A heat-insulating reactor (1) is provided at the bottom of the top cover (2).

8. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 7, characterized in that, A fixing bolt (10) is provided between the top cover (2) and the heat-insulating reactor (1), and a drain valve (9) is installed at the bottom of the heat-insulating reactor (1).

9. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 7, characterized in that, The bottom of the heat-insulating reactor (1) is fixedly connected to a support foot (4), and a heating tube (8) is wound inside the heat-insulating reactor (1).

10. The methanol oxygen-enriched reaction apparatus for formaldehyde preparation according to claim 9, characterized in that, One end of the heating tube (8) is equipped with a liquid inlet (5), and the other end of the heating tube (8) is connected to a liquid outlet (6).

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