Rectifying tower for formaldehyde production

Abstract

The utility model discloses a rectifying tower for formaldehyde production, which comprises a tank body, a mounting frame is fixed at the edge of the top of the tank body, a rectifying mechanism is arranged in the tank body, the rectifying mechanism comprises a feed pipe, a guide chute and a tower plate, sieve pores are arranged on the tower plate, and a driving mechanism is arranged at the top of the mounting frame; the driving mechanism comprises a mounting bracket, a driving motor, a driving disc, a supporting column, a connecting rod, a lantern ring and a driving shaft, the driving shaft is fixedly connected with the tower plate, and a limiting mechanism is arranged at the top of the driving shaft; the rectifying mechanism is arranged, a plurality of tower plates are matched with steam to rectify stock solution, in the process, the tower plates on the driving shaft are driven by the driving mechanism to reciprocate up and down, liquid is promoted to be sprayed on the sieve pores to cause dispersion and mixing and contact mass transfer, the flowability of the stock solution on the tower plates can be improved, and the stock solution is ensured to be in rapid and sufficient contact with high-temperature steam; and the efficiency of rectification extraction operation of formaldehyde is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde production, in particular to a distillation tower used for formaldehyde production. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It utilizes the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, to transfer the light components in the liquid phase to the gas phase, and the heavy components in the gas phase to the liquid phase, thereby achieving the purpose of separation. The distillation tower is also a mass and heat transfer device that is extremely widely used in petrochemical production.

[0003] After searching, the patent of Chinese patent application No. 202121401160.9 discloses a distillation tower for producing anhydrous formaldehyde, comprising a tower body, a discharge port is provided at the bottom center of the tower body, an air inlet is provided on the side wall of the tower body near the bottom, a reflux port is provided on the side wall of the tower body near the top, an air outlet is provided on the top of the tower body near the side wall, a water inlet is provided on the top of the tower body away from the air outlet, a feed port is provided on the side of the tower body away from the air inlet near the middle, a motor is fixedly connected to the top center of the tower body, the drive shaft of the motor passes through the top of the tower body and is rotatably connected thereto, the end face of the drive shaft of the motor is fixedly connected to a rotating shaft, and the outer wall of the rotating shaft is evenly fixedly connected to a turntable. The utility model improves the efficiency of separation by fully and evenly contacting the various materials in the tower, and at the same time cleans the distillation tower after use to ensure the cleanliness of the distillation tower.

[0004] The tower plate structure in the above patent is relatively fixed. During the actual distillation operation, the fluidity of the raw liquid on the tower plate is also poor, which reduces the extraction efficiency of formaldehyde and has poor practicality. Therefore, we propose a distillation tower for formaldehyde production to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a distillation tower for formaldehyde production.

[0006] The utility model solves the technical problem through the following technical solutions: comprising a tank body, a mounting frame fixed to the edge of the top of the tank body, a distillation mechanism provided inside the tank body, the distillation mechanism comprising a feed pipe fixed to one side of the tank body, a material guide trough fixed to one end of the feed pipe, a plurality of tower plates slidably connected to the inner wall of the tank body, sieve holes provided on the tower plates, and a driving mechanism provided on the top of the mounting frame;

[0007] The driving mechanism includes a mounting bracket, which is fixed to the top of the mounting frame by bolts, a driving motor is fixed to one side of the mounting bracket by bolts, a driving disk is fixed to the output end of the driving motor, a support column is fixed to one side of the driving disk, a connecting rod is rotatably connected to the outer side of the support column, one end of the connecting rod is rotatably connected to a collar, a driving shaft is fixed to the inner wall of the collar, the driving shaft is fixedly connected to the tower plate, and a limiting mechanism is provided on the top of the driving shaft.

[0008] As a further solution of the present invention: a support frame is fixed to the edge of the bottom of the tank body.

[0009] As a further solution of the present invention: a control panel is fixed to one side of the mounting frame by bolts.

[0010] As a further solution of the present invention: a steam inlet is fixed to the outer side of the tank body close to the support frame, and an exhaust port is fixed to the top of the tank body.

[0011] As a further solution of the present invention: an overflow weir is fixed on the top of the tower plate, a liquid collecting trough is provided at the bottom of the tower plate, a downcomer is fixed at the bottom of the tower plate, and an extractant inlet is fixed on the side of the tank body opposite to the steam inlet.

[0012] As a further solution of the present invention: the limiting mechanism includes a limiting slide column, the limiting slide column is fixed to the top of the drive shaft, the outer side of the limiting slide column is slidably connected to a sliding sleeve, the outer side of the sliding sleeve is fixed with a connecting bracket, and the connecting bracket is fixedly connected to the mounting bracket.

[0013] As a further solution of the present invention: a liquid outlet is fixed at the center of the bottom of the tank body.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. A distillation mechanism is provided to perform a distillation operation on the raw liquid through multiple trays in combination with steam. During the process, the driving mechanism drives the drive shaft to move up and down reciprocatingly, which can make the trays on the drive shaft move up and down, promote the liquid to be sprayed in the sieve holes to cause dispersion and mixing, and perform contact mass transfer. This can improve the fluidity of the raw liquid on the trays, ensure that the raw liquid is quickly and fully exposed to high-temperature steam, improve the efficiency of the distillation extraction operation of formaldehyde, and thus improve the practicality of the distillation tower when used;

[0016] 2. By setting up a limiting mechanism, when the drive shaft moves up and down reciprocatingly, the drive shaft drives the limiting slide to move up and down. Through the sliding connection between the limiting slide and the sliding sleeve, the movement of the drive shaft can be supported and limited, thereby ensuring the stability of the drive shaft movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows an axonometric structural diagram provided according to an embodiment of the utility model;

[0018] Figure 2 It shows an axonometric cross-sectional structural schematic diagram provided according to an embodiment of the utility model;

[0019] Figure 3 Shown is a diagram according to an embodiment of the present invention. Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 4 It shows a schematic diagram of a front cross-sectional structure provided according to an embodiment of the utility model;

[0021] Figure 5 Shown is a diagram according to an embodiment of the present invention. Figure 4 Schematic diagram of the enlarged structure of part B in the middle.

[0022] Legend:

[0023] 100 tank body, 110 support frame, 120 mounting frame, 130 control panel, 140 steam inlet, 150 liquid outlet, 160 exhaust port, 210 feed pipe, 220 guide trough, 230 tower plate, 231 overflow weir, 232 liquid collecting trough, 240 downcomer, 250 extractant inlet, 310 mounting bracket, 320 drive motor, 330 drive disc, 331 support column, 340 connecting rod, 350 collar, 360 drive shaft, 410 limiting sliding column, 420 sliding sleeve, 430 connecting bracket. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, “plurality” means two or more, unless otherwise clearly defined.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0027] See also Figure 1-5 The utility model provides a technical solution: comprising a tank body 100, a support frame 110 is fixed to the edge of the bottom of the tank body 100, a mounting frame 120 is fixed to the edge of the top of the tank body 100, a control panel 130 is fixed to one side of the mounting frame 120 by bolts, a distillation mechanism is provided inside the tank body 100, the distillation mechanism includes a feed pipe 210, a guide trough 220 and a tower plate 230, the tower plate 230 is provided with sieve holes, and a driving mechanism is provided on the top of the mounting frame 120;

[0028] The driving mechanism includes a mounting bracket 310, a driving motor 320, a driving disk 330 and a support column 331. The outer side of the support column 331 is rotatably connected to a connecting rod 340. One end of the connecting rod 340 is rotatably connected to a collar 350. The inner wall of the collar 350 is fixed with a driving shaft 360. The driving shaft 360 is fixedly connected to the tower plate 230. A limiting mechanism is provided on the top of the driving shaft 360. A distillation mechanism is provided to perform a distillation operation on the raw liquid through multiple tower plates 230 in combination with steam. During the process, the driving mechanism drives the driving shaft 360 to move back and forth up and down, which can make the tower plates 230 on the driving shaft 360 do reciprocating motion up and down, promote the liquid to be dispersed and mixed by injection in the sieve holes, and perform contact mass transfer, which can improve the fluidity of the raw liquid on the tower plate 230, ensure that the raw liquid quickly and fully contacts the high-temperature steam, improve the efficiency of the distillation extraction operation of formaldehyde, and thereby improve the practicality of the distillation tower when in use.

[0029] Specifically, a steam inlet 140 is fixed to the outside of the tank body 100 near the support frame 110, a liquid outlet 150 is fixed at the center of the bottom of the tank body 100, and an exhaust port 160 is fixed to the top of the tank body 100; steam is injected into the interior of the tank body 100 through the steam inlet 140, and the liquid outlet 150 is provided to discharge the material inside the tank body 100, and the steam released during the distillation operation is discharged through the exhaust port 160.

[0030] Specifically, an overflow weir 231 is fixed to the top of the tower plate 230, a liquid collecting tank 232 is provided at the bottom of the tower plate 230, a downcomer 240 is fixed to the bottom of the tower plate 230, and an extractant inlet 250 is fixed to the side of the tank body 100 opposite to the steam inlet 140; by providing a distillation mechanism, the raw liquid enters the liquid collecting tank 232 through the feed pipe 210 and the guide trough 220, and gradually flows through the tower plate 230, then overflows through the overflow weir 231, and finally enters the bottom tower plate 230 through the downcomer 240, and cooperates with the steam entering the bottom of the tank body 100 through the steam inlet 140 to realize the distillation operation of the raw liquid.

[0031] Specifically, the limiting mechanism includes a limiting slide 410, which is fixed to the top of the drive shaft 360. The outer side of the limiting slide 410 is slidably connected to a sleeve 420, and the outer side of the sleeve 420 is fixed with a connecting bracket 430, and the connecting bracket 430 is fixed to the mounting bracket 310. By setting a limiting mechanism, when the drive shaft 360 moves up and down, the drive shaft 360 drives the limiting slide 410 to move up and down. Through the sliding connection between the limiting slide 410 and the sleeve 420, the movement of the drive shaft 360 can be supported and limited, thereby ensuring the movement stability of the drive shaft 360.

[0032] Working principle: When in use, the tank body 100 is supported by the support frame 110, the operation of the distillation tower is controlled by the control panel 130, steam is injected into the tank body 100 through the steam inlet 140, and the steam released during the distillation operation is discharged through the exhaust port 160. The raw liquid enters the liquid collecting tank 232 through the feed pipe 210 and the guide trough 220, and gradually flows through the tower plate 230, then overflows through the overflow weir 231, and finally enters the bottom tower plate 230 through the downcomer 240. The steam entering the bottom of the tank body 100 through the steam inlet 140 realizes the distillation operation of the raw liquid. During the process, the driving motor 320 drives the driving disk 330 to rotate. The driving disc 330 drives the connecting rod 340 to move through the support column 331, and the connecting rod 340 drives the driving shaft 360 to move back and forth up and down through the collar 350, which can make the tower plate 230 on the driving shaft 360 reciprocate up and down, promote the liquid to be dispersed and mixed by injection in the sieve holes, and perform contact mass transfer, which can improve the fluidity of the raw liquid on the tower plate 230. When the driving shaft 360 moves back and forth up and down, the driving shaft 360 drives the limiting slide 410 to move up and down. The sliding connection between the limiting slide 410 and the sliding sleeve 420 can support and limit the movement of the driving shaft 360, and the material inside the tank body 100 is discharged by providing a liquid outlet 150.

[0033] The motor involved in the embodiment, its supporting control system, electromagnetic switch and pipeline route can also be provided by the manufacturer. In addition, the power supply module, circuit and electronic components and control module involved in the utility model are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to the internal structure and method.

[0034] Although the present invention discloses embodiments and drawings, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A distillation tower for formaldehyde production, characterized in that: The invention comprises a tank body (100), a mounting frame (120) is fixed to the edge of the top of the tank body (100), a distillation mechanism is arranged inside the tank body (100), the distillation mechanism comprises a feed pipe (210), the feed pipe (210) is fixed to one side of the tank body (100), a material guide trough (220) is fixed to one end of the feed pipe (210), a plurality of tower plates (230) are slidably connected to the inner wall of the tank body (100), the tower plates (230) are provided with sieve holes, and a driving mechanism is arranged on the top of the mounting frame (120); The driving mechanism comprises a mounting bracket (310), wherein the mounting bracket (310) is fixed to the top of the mounting frame (120) by means of bolts, a driving motor (320) is fixed to one side of the mounting bracket (310) by means of bolts, a driving disc (330) is fixed to the output end of the driving motor (320), a supporting column (331) is fixed to one side of the driving disc (330), a connecting rod (340) is rotatably connected to the outer side of the supporting column (331), a collar (350) is rotatably connected to one end of the connecting rod (340), a driving shaft (360) is fixed to the inner wall of the collar (350), the driving shaft (360) is fixedly connected to the tower plate (230), and a limiting mechanism is provided at the top of the driving shaft (360).

2. A distillation tower for formaldehyde production according to claim 1, characterized in that: A support frame (110) is fixed to the edge of the bottom of the tank body (100).

3. A distillation tower for formaldehyde production according to claim 2, characterized in that: A control panel (130) is fixed to one side of the mounting frame (120) by means of bolts.

4. A distillation tower for formaldehyde production according to claim 3, characterized in that: A steam inlet (140) is fixed to the outer side of the tank body (100) close to the support frame (110), and an exhaust port (160) is fixed to the top of the tank body (100).

5. A distillation tower for formaldehyde production according to claim 1, characterized in that: An overflow weir (231) is fixed on the top of the tower plate (230), a liquid collecting tank (232) is provided at the bottom of the tower plate (230), a downcomer (240) is fixed at the bottom of the tower plate (230), and an extractant inlet (250) is fixed on the side of the tank body (100) opposite to the steam inlet (140).

6. A distillation tower for formaldehyde production according to claim 1, characterized in that: The limiting mechanism includes a limiting slide (410), the limiting slide (410) is fixed to the top of the drive shaft (360), the outer side of the limiting slide (410) is slidably connected to a sliding sleeve (420), the outer side of the sliding sleeve (420) is fixed with a connecting bracket (430), and the connecting bracket (430) is fixedly connected to the mounting bracket (310).

7. A distillation tower for formaldehyde production according to claim 1, characterized in that: A liquid outlet (150) is fixed at the center of the bottom of the tank body (100).

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