An adjustable distillation device for producing benzaldehyde

Abstract

The invention discloses an adjustable distillation device for producing benzaldehyde, which relates to the technical field of distillation and comprises a distillation tank body, wherein a plurality of tower plates are equidistantly arranged in the upper and lower parts of the distillation tank body, a feed pipeline is connected to the middle end of the distillation tank body, and a sieve hole for liquid diversion is opened on each tower plate; a float valve assembly is arranged in the sieve hole, and the float valve assembly comprises a mounting ring which slides up and down in the sieve hole, an impeller structure is connected below the mounting ring, a guide groove is used to increase the pressure of the liquid in the liquid discharge process, so that the impact force of the liquid when the liquid is discharged is used as the power to drive the impeller structure to rotate, so that the liquid is stirred while being diverted, so that the liquid flows through the impeller structure in a vortex shape, and the flow rate of the liquid is increased, so that the sieve hole is flushed, and coking, high-viscosity materials or impurities are reduced. Adherence to the sieve hole causes blockage, and the problem of sieve hole blockage is solved by changing the liquid discharge state.

Description

Technical Field

[0001] The invention relates to the technical field of distillation, in particular to an adjustable distillation device for producing benzaldehyde. Background Art

[0002] Benzaldehyde is usually produced by oxidation of toluene or benzyl alcohol. Distillation is a key step in the purification process. Benzaldehyde has a boiling point of 179°C and is a heat-sensitive substance. It may decompose or polymerize at high temperatures, affecting product purity and yield. Imprecise temperature control during operation can cause impure fractions or coking of materials.

[0003] The materials used in benzaldehyde production may contain high-viscosity substances, polymers or tars, which are easy to accumulate on the float valve. For example, benzaldehyde may polymerize at high temperatures to generate tar-like substances, or the raw materials may contain unreacted impurities, which may form deposits. If the operating temperature is too high, the decomposition and coking of the materials may be accelerated. Pressure fluctuations or flooding may cause solid particles to be brought into the float valve area. These substances gather and adhere to the float valve, which may easily cause the float valve to become clogged, affecting the liquid discharge and ventilation efficiency, especially in the case of high viscosity or containing solid particles, which greatly increases the chance of clogging. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable distillation device for benzaldehyde production, which uses a guide groove to increase the pressure of the liquid during the liquid discharge process, so that the impact force of the liquid during the liquid discharge is used as the power to drive the impeller structure to rotate, and the liquid is stirred while being diverted, so that the liquid flows through the impeller structure in a vortex shape, and the flow rate of the liquid is increased, so that the liquid is flushed in the sieve hole, and the coking, high-viscosity materials or impurities adhering to the sieve hole are reduced, resulting in blockage, and the problem of sieve hole blockage is solved by changing the liquid discharge state.

[0005] To achieve the above object, the present invention provides the following technical solution: an adjustable distillation device for producing benzaldehyde, comprising a distillation tank body, wherein a plurality of tower plates are arranged equidistantly from top to bottom in the distillation tank body, a feed pipeline is connected to the middle end of the distillation tank body, and a sieve hole for liquid drainage is provided on each tower plate; A float valve assembly is arranged in the sieve hole, and the float valve assembly includes a mounting ring that slides up and down in the sieve hole, an impeller structure is connected below the mounting ring, a floating member is connected above the mounting ring, and a plurality of guide grooves are arranged in an annular array in the mounting ring, and the outlet end of each guide groove faces the blades on the impeller structure, and a cleaning member is installed on the impeller structure; When the mounting ring is inserted into the sieve hole, the inner wall of the sieve hole is used to close the inlet end of the guide groove. When the mounting ring moves up to the open state of the guide groove, liquid enters the guide groove, and the liquid serves as the power to drive the mounting ring to move up. The impact force of the liquid when it flows through the guide groove and is pressurized and discharged serves as the power to drive the impeller structure to rotate. When the impeller structure rotates, it drives the cleaning part to clean the sieve hole.

[0006] Furthermore, the impeller structure is connected to the mounting ring bearing, and a plurality of sliding support plates are connected below the mounting ring. The inner wall of the sieve hole is provided with a plurality of limit brackets for limiting the sliding of the sliding support plates. The bottom end of the limit bracket is vertically connected to an axis connecting plate through the bracket, and the bottom end of the impeller structure is mounted on the axis connecting plate.

[0007] Furthermore, an oblique guide grille is extended from the side of each sliding support plate.

[0008] Furthermore, the impeller structure includes an outer rotating ring, a mounting ring seat, a telescopic rod, an inner plate and an adjusting rod. The outer surface of the outer rotating ring is provided with a plurality of hole grooves for accommodating the mounting ring seat. Each blade is correspondingly fixed on each mounting ring seat. An inner plate is slidably arranged inside the outer rotating ring. A plurality of adjusting rods are installed on the inner plate. The bottom end of the inner plate is connected to the telescopic rod.

[0009] Furthermore, one end of the mounting ring seat located inside the outer rotating ring is vertically connected to a transverse rod, one end of the transverse rod is hinged to the upper end of the adjusting rod, and the lower end of the adjusting rod is hinged to the built-in plate.

[0010] Furthermore, the outer wall of the mounting ring seat is butted against the inner wall of the hole groove formed on the outer surface of the outer rotating ring through a bearing.

[0011] Furthermore, when the float valve assembly rises, the blade is adjusted to the first state, and when the float valve assembly moves down and resets, the blade is adjusted back to the second state. When the blade is in the first state, the liquid discharged from the outlet end of the guide groove contacts the blade surface in a vertical state.

[0012] Furthermore, the guide groove is spiral-shaped, the upper opening of the guide groove is located on the outer surface of the mounting ring, the lower outlet of the guide groove is located on the lower end surface of the mounting ring, and the diameters of both ends of the guide groove continuously decrease from top to bottom.

[0013] Furthermore, the cleaning member comprises a U-shaped bracket connected to the impeller structure, and a cleaning layer in contact with the inner wall of the sieve hole is provided on the surface of the U-shaped bracket.

[0014] Furthermore, a conical baffle is connected below the impeller structure, and a plurality of radial grooves are formed on the conical baffle.

[0015] Technical effects and advantages of the present invention: 1. When the mounting ring of the present invention moves up to the open state of the guide groove, liquid enters the guide groove, and the liquid serves as the driving force for driving the mounting ring to move up, and the impact force of the liquid when it flows through the guide groove and is pressurized and discharged serves as the driving force for the impeller structure to rotate. The guide groove is used to increase the pressure of the liquid during the discharge process, so that the impact force of the liquid when it is discharged serves as the driving force for the impeller structure to rotate, thereby achieving stirring of the liquid while guiding the liquid, making the liquid flow through the impeller structure in a vortex shape, and increasing the flow rate of the liquid, so that it flushes the sieve hole, reduces coking, high-viscosity materials or impurities adhering to the sieve hole, causing blockage, and solves the problem of sieve hole blockage by changing the liquid discharge state.

[0016] 2. The present invention adjusts the inclination of the blades so that the kinetic energy of the fluid is converted into the rotational mechanical energy of the blades through a momentum transfer mechanism, causing the blades to produce angular acceleration motion around the axis. When the flow direction of the fluid is in contact with the working surface of the blade at a 90° perpendicular state, the force acting on the blades is maximum, effectively increasing the rotation speed of the blades.

[0017] 3. The present invention changes the flow direction of the liquid when it flows in from the slot by setting an oblique guide grid, and the flow direction of the liquid flowing in from the slot is the same as the rotation direction of the impeller structure, which increases the state of vortex discharge from the screen hole without affecting the rotation of the impeller structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the distillation tank body of the present invention; Figure 2 It is a schematic diagram of the installation structure of the tower plate and the floating valve assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the float valve assembly of the present invention; Figure 4 An exploded view of a float valve assembly of the present invention; Figure 5 A half-section diagram of the impeller structure of the present invention; Figure 6 It is a schematic diagram of adjusting the angle between the blade receiving surface and the water flow incident angle of the present invention; Figure 7 It is a schematic diagram of the mounting ring structure of the present invention; Figure 8 It is a schematic diagram of the conical baffle structure of the present invention.

[0019] In the figure: 1. Distillation tank body; 11. Tower plate; 111. Sieve hole; 112. Limit bracket; 12. Feed pipe; 2. Float valve assembly; 21. Mounting ring; 211. Floating part; 212. Guide groove; 213. Sliding support plate; 2132. Guide grid; 22. Impeller structure; 221. Blade; 222. Outer rotating ring; 223. Mounting ring seat; 2231. Transverse rod; 224. Telescopic rod; 225. Built-in plate; 226. Adjustment rod; 23. Conical baffle; 231. Guide groove; 3. Cleaning part; 31. U-shaped bracket; 32. Cleaning layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to better understand the adjustable distillation device for producing benzaldehyde provided in the present embodiment, the existing microsphere filtration equipment is briefly introduced below. In order to solve the problem that the prior art places the filter membrane on the filtration plane, the center of the filter membrane is the filtration hole position, and when the filter membrane filters the mixture containing microspheres, the mixture is poured on the filter membrane. Since the center of the filter membrane is subjected to the greatest impact and there is no support at the center of the filter membrane, the edge of the filter membrane is lifted up, and part of the mixture is directly discharged without being filtered by the filter membrane, affecting the filtration effect. The specification aims to solve the above technical problems. The present application embodiment provides an adjustable distillation device for producing benzaldehyde, wherein the float valve assembly 2 provided therein can generate buoyancy by cooperating with the liquid, and diverts the liquid during the floating process, and utilizes The guide groove 212 is used to increase the pressure of the liquid during the discharge process, so that the impact force of the liquid when it is discharged is used as the power to drive the impeller structure 22 to rotate, so as to achieve stirring of the liquid while guiding the flow, so that the liquid flows through the impeller structure 22 in a vortex shape, and the flow rate of the liquid is increased, so that it can flush the sieve hole 111, reduce coking, high-viscosity materials or impurities adhering to the sieve hole 111, causing blockage, and solve the problem of blockage of the sieve hole 111 by changing the liquid discharge state, without the need to configure power, avoiding unnecessary energy consumption. Secondly, the rotation of the impeller structure 22 can not only change the liquid inlet state, but also the steam rising state. When the steam passes through the sieve hole 111, it is broken up by the vortex, which can promote the gas-liquid two-phase mass and heat exchange in a more uniform and dispersed manner, thereby improving the distillation efficiency.

[0022] Example 1: Reference Figure 1 - Figure 6, which is the first embodiment of the present invention, provides an adjustable distillation device for producing benzaldehyde, comprising a distillation tank body 1, wherein a plurality of trays 11 are arranged equidistantly in the upper and lower parts of the distillation tank body 1, a feed pipe 12 is connected to the middle end of the distillation tank body 1, and a sieve hole 111 for liquid drainage is provided on each tray 11; A float valve assembly 2 is arranged in the sieve hole 111, and the float valve assembly 2 includes a mounting ring 21 that slides up and down in the sieve hole 111, an impeller structure 22 is connected below the mounting ring 21, a floating member 211 is connected above the mounting ring 21, and a plurality of guide grooves 212 are arranged in an annular array in the mounting ring 21, and the outlet end of each guide groove 212 faces the blade 221 on the impeller structure 22. When the mounting ring 21 is inserted and arranged in the sieve hole 111, the inner wall of the sieve hole 111 is used to close the inlet end of the guide groove 212. When the mounting ring 21 moves up to the open state of the guide groove 212, the liquid enters the guide groove 212, and the liquid is used as a drive. The driving force for the upward movement of the movable mounting ring 21 and the impact force of the liquid when it flows through the guide groove 212 and is pressurized and discharged are used as the driving force for the impeller structure 22 to rotate. The guide groove 212 is used to increase the pressure of the liquid during the discharge process, so that the impact force of the liquid when it is discharged is used as the driving force for the impeller structure 22 to rotate, thereby achieving the stirring of the liquid while guiding the liquid, so that the liquid flows through the impeller structure 22 in a vortex shape, and the flow rate of the liquid is increased, so that it flushes the sieve hole 111, reduces coking, high-viscosity materials or impurities adhering to the sieve hole 111, causing blockage, and solves the problem of blockage of the sieve hole 111 by changing the liquid discharge state.

[0023] A cleaning piece 3 is installed on the impeller structure 22. When the impeller structure 22 rotates, the cleaning piece 3 is driven to clean the inside of the sieve hole 111. The cleaning piece 3 includes a U-shaped bracket 31 connected to the impeller structure 22, and a cleaning layer 32 in contact with the inner wall of the sieve hole 111 is provided on the surface of the U-shaped bracket 31. The U-shaped bracket 31 rotates together, and the cleaning layer 32 on the surface scrubs the inner wall of the sieve hole 111 to achieve secondary cleaning, thereby effectively cleaning stubborn attachments.

[0024] The impeller structure 22 is connected to the bearing of the mounting ring 21, and a plurality of sliding support plates 213 are connected below the mounting ring 21. The inner wall of the sieve hole 111 is provided with a plurality of limit brackets 112 for limiting the sliding of the sliding support plates 213. The bottom end of the limit bracket 112 is vertically connected to an axis connecting plate through the bracket. The bottom end of the impeller structure 22 is installed on the axis connecting plate. The upper and lower ends of the impeller structure 22 are both connected with bearings. The limit bracket 112 is used to limit the sliding stroke of the sliding support plate 213. When the mounting ring 21 moves down and retracts into the sieve hole 111, the sieve hole 111 is blocked.

[0025] Example 2: Reference Figure 3 - Figure 5, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the impeller structure 22 includes an outer rotating ring 222, a mounting ring seat 223, a telescopic rod 224, an inner plate 225 and an adjusting rod 226. The outer surface of the outer rotating ring 222 is provided with a plurality of holes and grooves for accommodating the mounting ring seat 223. Each blade 221 is correspondingly fixed on each mounting ring seat 223. An inner plate 225 is slidably arranged in the outer rotating ring 222. A plurality of adjusting rods 226 are installed on the inner plate 225. The bottom end of the inner plate 225 is connected to the telescopic rod 224.

[0026] One end of the mounting ring seat 223 located inside the outer rotating ring 222 is vertically connected to a transverse rod 2231, one end of the transverse rod 2231 is hinged to the upper end of the adjusting rod 226, and the lower end of the adjusting rod 226 is hinged to the built-in plate 225. The outer wall of the mounting ring seat 223 is butt-jointed with the inner wall of the hole groove opened on the outer surface of the outer rotating ring 222 through a bearing.

[0027] When the float valve assembly 2 rises, the blade 221 is adjusted to the first state. When the float valve assembly 2 moves down and resets, the blade 221 is adjusted back to the second state. When the blade 221 is in the first state, the liquid discharged from the outlet end of the guide groove 212 is in vertical state and contacts the surface of the blade 221. At this time, the impact force of the liquid discharged from the outlet end of the guide groove 212 on the surface of the blade 221 is the largest, so that the impact force can be used to drive the impeller structure 22 to rotate. By adjusting the inclination of the blade 221, when the water flows on the blade 221 at an incident angle consistent with the normal direction of the flow receiving surface of the blade 221, The normal impact force generated by the fluid momentum will form a pressure gradient field on the geometric surface of blade 221. The impact force can be decomposed into a shear force component and a radial pressure component along the tangential direction of blade 221, wherein the tangential shear force component constitutes a driving torque on the rotating shaft of blade 221. The fluid kinetic energy is converted into the rotational mechanical energy of blade 221 through a momentum transfer mechanism, causing blade 221 to produce angular acceleration motion around the axis. When the fluid flow direction is in contact with the working surface of blade 221 at a 90° orthogonal state, the force on blade 221 is the largest, effectively increasing the rotation speed of blade 221.

[0028] Specifically, when the mounting ring 21 floats up due to the action of the floating member 211, the outer rotating ring 222, the mounting ring seat 223 and the blade 221 are driven to move up together, and the inner plate 225 pulls the adjustment rod 226 under its own weight. Under the pull of the adjustment rod 226, the transverse rod 2231 rotates, and then drives the mounting ring seat 223 and the blade 221 to rotate together to adjust the inclination angle of the blade 221. When the mounting ring 21 moves up to the bottom end and is locked with the inner plate 225, the blade 221 is adjusted to the first state. The mounting ring 21 continuously moves upward, thereby driving the built-in plate 225 and the adjusting rod 226 to move upward together. The dead weight of the built-in plate 225 and the adjusting rod 226 always keeps the blade 221 in the first state. When the mounting ring 21 loses buoyancy and moves downward, the outer rotating ring 222, the mounting ring seat 223 and the blade 221 move downward by their own weight. The built-in plate 225 is reset under the action of the telescopic rod 224, and the adjusting rod 226 is pushed up, thereby driving the transverse rod 2231, the mounting ring seat 223 and the blade 221 to rotate and reset.

[0029] Example 3: Reference Figure 7 , which is the third embodiment of the present invention. This embodiment is different from the first embodiment in that the guide groove 212 is spiral, the upper end opening of the guide groove 212 is located on the outer surface of the mounting ring 21, and the lower end outlet of the guide groove 212 is located on the lower end surface of the mounting ring 21, and the diameter of the two ends of the guide groove 212 is continuously reduced from top to bottom. The spiral and smooth guide groove 212 improves the smoothness of drainage and avoids absorbing the impact force during liquid discharge. The inlet and outlet are set from large to small in sequence. The water pressure of the liquid is increased by gradually reducing the diameter of the pipeline, and then the impact force of the liquid is increased, ensuring that the impeller structure 22 can be driven to rotate while increasing the impact force, so that the substances accumulated on the float valve assembly 2 and in the sieve hole 111 are washed away as much as possible to avoid clogging of the float valve.

[0030] An oblique guide grille 2132 is extended from the side of each sliding support plate 213. The oblique guide grille 2132 is used to change the shape of the slot between two adjacent sliding support plates 213. By setting the guide grille 2132, the flow direction of water when entering from the slot between the two sliding support plates 213 is changed, so that when the liquid flows in from the slot, its flow direction is opposite to the blade 221. It should be noted that when the mounting ring 21 is moved up to expose the sliding support plate 213, the slot between the sliding support plates 213 is also used as a through hole for liquid discharge, and when the liquid is discharged from the slot between the sliding support plates 213, the water pressure of the liquid discharged in the guide groove 212 will become smaller. By setting the oblique guide grille 2132, the flow direction of the liquid when flowing in from the slot is changed, and the flow direction of the liquid flowing in from the slot is the same as the rotation direction of the impeller structure 22, while not affecting the rotation of the impeller structure 22, the state of vortex discharge of the sieve hole 111 is increased.

[0031] Example 3: Reference Figure 8, which is the third embodiment of the present invention. This embodiment is different from the first embodiment in that a conical baffle 23 is connected below the impeller structure 22, and a plurality of radial grooves 231 are formed on the conical baffle 23. The conical baffle 23 is used to block the rising steam to prevent the rising steam from directly contacting the impeller structure 22, thereby damaging the blade 221 structure. The radial grooves 231 are used to guide the rising steam in a dispersed manner and to guide the downstream liquid, thereby increasing the dispersion and rise of the steam and protecting the impeller structure 22 at the same time.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable distillation device for producing benzaldehyde, comprising a distillation tank (1), characterized in that: A plurality of trays (11) are equidistantly arranged in the distillation tank body (1), the middle end of the distillation tank body (1) is connected to a feed pipe (12), and each tray (11) is provided with a sieve hole (111) for liquid drainage; A float valve assembly (2) is arranged in the sieve hole (111), the float valve assembly (2) comprising a mounting ring (21) that slides up and down in the sieve hole (111), an impeller structure (22) is connected below the mounting ring (21), a floating member (211) is connected above the mounting ring (21), a plurality of guide grooves (212) are arranged in an annular array in the mounting ring (21), an outlet end of each guide groove (212) faces a blade (221) on the impeller structure (22), and a cleaning member (3) is installed on the impeller structure (22); When the mounting ring (21) is inserted and arranged in the sieve hole (111), the inner wall of the sieve hole (111) is used to close the inlet end of the guide groove (212). When the mounting ring (21) moves upward to the open state of the guide groove (212), liquid enters the guide groove (212). The liquid serves as a driving force for driving the mounting ring (21) to move upward, and the impact force of the liquid when it flows through the guide groove (212) and is pressurized and discharged serves as a driving force for the impeller structure (22) to rotate. When the impeller structure (22) rotates, it drives the cleaning member (3) to clean the inside of the sieve hole (111).

2. The adjustable distillation apparatus for producing benzaldehyde according to claim 1, characterized in that: The impeller structure (22) is connected to the bearing of the mounting ring (21); a plurality of sliding support plates (213) are connected below the mounting ring (21); the inner wall of the sieve hole (111) is provided with a plurality of limit brackets (112) for limiting the sliding of the sliding support plates (213); the bottom end of the limit bracket (112) is vertically connected to a shaft connecting plate via the bracket; and the bottom end of the impeller structure (22) is mounted on the shaft connecting plate.

3. The adjustable distillation apparatus for producing benzaldehyde according to claim 2, characterized in that: An oblique flow guide grille (2132) is extended from the side of each sliding support plate (213).

4. The adjustable distillation apparatus for producing benzaldehyde according to claim 3, characterized in that: The impeller structure (22) comprises an outer rotating ring (222), a mounting ring seat (223), a telescopic rod (224), an inner plate (225) and an adjusting rod (226); a plurality of holes and grooves for accommodating the mounting ring seat (223) are provided on the outer surface of the outer rotating ring (222); each blade (221) is correspondingly fixed on each mounting ring seat (223); an inner plate (225) is slidably arranged inside the outer rotating ring (222); a plurality of adjusting rods (226) are mounted on the inner plate (225); and the bottom end of the inner plate (225) is connected to the telescopic rod (224).

5. The adjustable distillation apparatus for producing benzaldehyde according to claim 4, characterized in that: One end of the mounting ring seat (223) located inside the outer rotating ring (222) is vertically connected to a transverse rod (2231), one end of the transverse rod (2231) is hinged to the upper end of the adjustment rod (226), and the lower end of the adjustment rod (226) is hinged to the built-in plate (225).

6. The adjustable distillation apparatus for producing benzaldehyde according to claim 4, characterized in that: The outer wall of the mounting ring seat (223) is butted against the inner wall of the hole groove formed on the outer surface of the outer rotating ring (222) via a bearing.

7. The adjustable distillation apparatus for producing benzaldehyde according to claim 1, characterized in that: When the float valve assembly (2) rises, the blade (221) is adjusted to a first state; when the float valve assembly (2) moves downward and resets, the blade (221) returns to a second state; when the blade (221) is in the first state, liquid discharged from the outlet end of the guide groove (212) contacts the surface of the blade (221) in a vertical state.

8. The adjustable distillation apparatus for producing benzaldehyde according to claim 1, characterized in that: The guide groove (212) is spiral-shaped, the upper opening of the guide groove (212) is located on the outer surface of the mounting ring (21), the lower outlet of the guide groove (212) is located on the lower end surface of the mounting ring (21), and the diameters of both ends of the guide groove (212) continuously decrease from top to bottom.

9. The adjustable distillation apparatus for producing benzaldehyde according to claim 1, characterized in that: The cleaning member (3) comprises a U-shaped bracket (31) connected to the impeller structure (22), and a cleaning layer (32) in contact with the inner wall of the sieve hole (111) is provided on the surface of the U-shaped bracket (31).

10. The adjustable distillation apparatus for producing benzaldehyde according to claim 1, characterized in that: A conical baffle (23) is connected below the impeller structure (22), and a plurality of radial grooves (231) are formed on the conical baffle (23).

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