Self-cleaning filler type rectification device

Abstract

The invention provides a self-cleaning packing type rectification device. The self-cleaning packing type rectification device comprises a rectification tower body, a first cleaning pump, a first liquid conveying pipe, a spraying assembly, a first liquid discharging pipe and at least two packing layers which are sequentially arranged at intervals from bottom to top in the tower body, at least one spraying assembly is arranged at the position corresponding to each filler layer, each spraying assembly comprises at least two spraying water guns which are uniformly distributed around the filler layer and mounted on the outer circumferential wall of the tower body, a liquid outlet of the first cleaning pump is communicated with the first end of a first liquid conveying pipe, and the second end of the first liquid conveying pipe is communicated with each spraying water gun; the first liquid discharge pipe is communicated with the bottom of the tower body; a containing groove is formed in the position, corresponding to the spraying water gun, of the packing layer, a gun head of the spraying water gun extends into the corresponding containing groove, a gun shaft of the spraying water gun extends in the radial direction of the tower body, the gun head can swing in the containing groove in the direction perpendicular to the gun shaft, and the swing gun head can rotate around the gun shaft. The technical problems of high labor intensity and high cost of a rectification device are solved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and in particular to a self-cleaning packing type distillation device. Background Art

[0002] α-Pyrrolidone is a pharmaceutical intermediate. It is a colorless or slightly yellow clear liquid with a slight ammonia smell. Its melting point is 24.6°C and boiling point is 245°C. It is miscible with organic solvents such as water, alcohol, chloroform, benzene, acetic acid, ethyl ester and sulfur dioxide, but is insoluble in petroleum ether.

[0003] At present, most manufacturers use the production process of γ-butyrolactone ammoniation to produce α-pyrrolidone. In the production process, a distillation device is required to separate and purify the reaction products. Packing distillation devices are widely used in the preparation of α-pyrrolidone due to their low pressure drop, strong adaptability and high efficiency. However, during the long-term continuous operation of the packing distillation device, the solid impurities in the distilled liquid will gradually adhere to and accumulate on the packing, causing the heat transfer and mass transfer efficiency to decrease, which will seriously affect the normal operation of the distillation device. Therefore, it is necessary to clean the distillation device regularly to remove the adhesion on the packing and restore the working condition of the distillation device.

[0004] The traditional cleaning method is: disassembly-cleaning-assembly mode, which requires large-scale lifting equipment for disassembly, is labor-intensive, consumes a lot of manpower, takes a long time, is costly, and has a great impact on production. At present, there are also automatic cleaning distillation devices, which generally set a spray device above the packing layer to clean the packing below by spraying cleaning liquid. In this way, the water flow through the packing is slow and the power is poor, and the stubborn dirt in the packing cannot be cleaned. The distillation tower still needs to be disassembled and cleaned at regular intervals.

[0005] Therefore, an improved self-cleaning packing type distillation device is urgently needed. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a self-cleaning packing type distillation device, which solves the technical problems of poor cleaning effect, high labor intensity and high cost of the prior distillation device.

[0008] (II) Technical solution

[0009] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0010] The present invention provides a self-cleaning packing type distillation device, comprising a distillation tower body, a first cleaning system and at least two packing layers arranged in sequence from bottom to top in the tower body;

[0011] The first cleaning system includes a first cleaning pump, a first liquid infusion pipe, a spray assembly and a first liquid discharge pipe. At least one spray assembly is arranged corresponding to the position of each packing layer. The spray assembly includes at least two spray water guns evenly distributed around the packing layer and installed on the peripheral wall of the tower body. The liquid outlet of the first cleaning pump is connected to the first end of the first liquid infusion pipe through the first liquid infusion valve. The second end of the first liquid infusion pipe is connected to each spray water gun. The first liquid discharge pipe is connected to the bottom of the tower body.

[0012] A receiving groove is provided at the position of the packing layer corresponding to the spray water gun. The gun head of the spray water gun extends into the tower body and is located in its corresponding receiving groove. The gun axis of the spray water gun extends radially along the tower body. The gun head can swing in the receiving groove in a direction perpendicular to the gun axis, and the gun head can rotate around the gun axis after swinging.

[0013] Optionally, the self-cleaning packed distillation device also includes a second cleaning system, which includes a second cleaning pump, a second infusion pipe and a second discharge pipe. The outlet of the second cleaning pump is connected to the first end of the second infusion pipe through a second infusion valve, the second end of the second infusion pipe is connected to the top of the tower body, the first end of the second discharge pipe is connected to the bottom of the tower body, and the second end of the second discharge pipe is formed with a first discharge sub-pipe and a second discharge sub-pipe. The first discharge sub-pipe is connected to the liquid inlet of the second cleaning pump through the first discharge valve, and the second discharge sub-pipe is connected to the waste liquid bin through the second discharge valve.

[0014] Optionally, the liquid pumped by the first cleaning pump is clean water, and the liquid pumped by the second cleaning pump is descaling liquid.

[0015] Optionally, the spray water gun includes a first drive unit, a second drive unit, a first pull rope, a second pull rope, a rope winding wheel group, a water gun housing, a water spray pipe, and a swing sleeve and a mounting sleeve arranged in sequence along the gun axis;

[0016] The water gun housing can be rotatably mounted on the outer peripheral wall of the tower body around the gun axis, the mounting sleeve is fixed on the water gun housing, the first end of the swing sleeve is rotatably connected to the first end of the mounting sleeve to form a swing axis, the swing sleeve swings around the swing axis in a direction perpendicular to the gun axis, the water spray pipe is inserted into the mounting sleeve and the swing sleeve, the portion of the water spray pipe extending out of the second end of the swing sleeve forms a gun head, the water spray pipe corresponding to the rotational connection position of the swing sleeve and the mounting sleeve is a flexible section, and the portion of the water spray pipe extending out of the first end of the mounting sleeve is rotatably connected to the first infusion pipe;

[0017] The first driving unit and the rope winding wheel group are both installed on the water gun housing, the first driving unit is connected to the rope winding wheel group in transmission, the first end of the first pull rope is connected to the swing sleeve and is located on the first side of the water spray pipe, the first end of the second pull rope is connected to the swing sleeve and is located on the second side of the water spray pipe, the second end of the first pull rope is wound around the rope winding wheel group, and the second end of the second pull rope is wound around the rope winding wheel group; the power output shaft of the first driving unit rotates forward, drives the rope winding wheel group to release the second pull rope forward, tightens the first pull rope backward, and the first pull rope pulls the swing sleeve and the water spray pipe in the swing sleeve to swing in the first direction; the power output shaft of the first driving unit rotates reversely, drives the rope winding wheel group to release the first pull rope forward, tightens the second pull rope backward, and the second pull rope pulls the swing sleeve and the water spray pipe in the swing sleeve to swing in the second direction;

[0018] The second driving unit is fixedly mounted on the outer peripheral wall of the tower body, and the second driving unit is transmission-connected with the water gun housing. The second driving unit drives the water gun housing to rotate relative to the first infusion tube.

[0019] Optionally, the water spray pipe includes a gun head and a straight tube body connected in sequence along the gun axis, the gun head is Y-shaped, including a first straight tube portion, a second straight tube portion and a third straight tube portion connected to one point, the first straight tube portion is connected to the straight tube body to form a straight line, the second straight tube portion and the third straight tube portion are symmetrically arranged about the first straight tube portion, and the angle between the second straight tube portion and the third straight tube portion is 30° to 80°; the plane where the gun head is located is coplanar with the swing plane of the swing sleeve.

[0020] Optionally, the included angle between the second straight tube portion and the third straight tube portion is 60° to 80°.

[0021] Optionally, three spray assemblies are arranged corresponding to the position of each packing layer, namely, a first spray assembly, a second spray assembly and a third spray assembly, the first spray assembly is arranged at the top of the packing layer, the second spray assembly is arranged at the middle of the packing layer, and the third spray assembly is arranged at the bottom of the packing layer;

[0022] The spray water gun of the first spray assembly and the spray water gun of the second spray assembly are arranged in corresponding positions, and the spray water gun of the second spray assembly and the spray water gun of the third spray assembly are arranged in corresponding positions.

[0023] Optionally, the distance between two adjacent spray water guns in the first spray assembly is less than 1.7 times the spray distance of the spray water gun, the distance between two spray water guns corresponding to each other in the first spray assembly and the second spray assembly is less than 1.7 times the spray distance of the spray water gun, and the distance between two spray water guns corresponding to each other in the second spray assembly and the third spray assembly is less than 1.7 times the spray distance of the spray water gun; the diameter of the tower body is less than 1.7 times the spray distance of the spray water gun.

[0024] Optionally, the rope winding wheel group includes a driving wheel, a first rope winding wheel and a second rope winding wheel installed in the water gun housing, the first rope winding wheel is located on the first side of the water spray pipe, the second rope winding wheel is located on the second side of the water spray pipe, the driving wheel is located between the first rope winding wheel and the second rope winding wheel, the first rope winding wheel and the second rope winding wheel are respectively connected to the driving wheel in transmission, the first drive unit is connected to the driving wheel in transmission, the second end of the first pull rope is wound around the first rope winding wheel, and the second end of the second pull rope is wound around the second rope winding wheel.

[0025] Optionally, an assembly gap is formed between the water spray pipe and the mounting sleeve, the first pull rope and the second pull rope are both accommodated in the assembly gap, the first end of the first pull rope extends out of the assembly gap and is connected to the swing sleeve, the first end of the second pull rope extends out of the assembly gap and is connected to the swing sleeve, and a first through hole and a second through hole relative to each other are opened on the tube wall of the mounting sleeve, the second end of the first pull rope passes through the first through hole and is wound around the rope winding wheel group, and the second end of the second pull rope passes through the second through hole and is wound around the rope winding wheel group.

[0026] (III) Beneficial effects

[0027] The beneficial effects of the present invention are:

[0028] The self-cleaning distillation device provided by the present invention is characterized in that a spray water gun is arranged around the packing layer, and the gun head of the spray water gun can swing in the horizontal direction in the receiving tank, and the gun head after swinging can rotate around the gun axis, so as to realize comprehensive high-pressure cleaning of the packing layer, quickly wash away the stubborn dirt on the packing layer, have good cleaning effect and high cleaning efficiency, and the whole process can be realized by automation without consuming a lot of manpower, with short time and low cost, and little impact on production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a self-cleaning packed distillation device according to a specific embodiment of the present invention;

[0030] Figure 2 A schematic cross-sectional view of a spray gun according to a specific embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the enlarged structure of the connection between the swing sleeve and the installation sleeve according to a specific embodiment of the present invention.

[0032] Description of Reference Numerals

[0033] 1: Tower body;

[0034] 2: Filling layer;

[0035] 21: receiving slot;

[0036] 3: Spray water gun;

[0037] 31: first pull rope; 32: second pull rope; 33: water gun housing; 34: swing sleeve; 35: installation sleeve; 36: water spray pipe; 37: first infusion pipe;

[0038] 352: first through hole; 353: second through hole;

[0039] 362: second straight pipe section; 363: third straight pipe section;

[0040] 381: driving wheel; 382: first rope winding wheel; 383: second rope winding wheel; 384: first transition wheel; 385: second transition wheel;

[0041] 41: second cleaning pump; 42: second infusion tube; 43: second discharge tube; 45: second infusion valve; 46: first discharge sub-tube; 47: second discharge sub-tube; 48: first discharge valve; 49: second discharge valve. DETAILED DESCRIPTION

[0042] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0043] like Figure 1 As shown, the present invention provides a self-cleaning packing type distillation device, comprising a distillation tower body 1, a first cleaning system and at least two packing layers 2 arranged in sequence from bottom to top in the tower body 1; the first cleaning system comprises a first cleaning pump (not shown in the figure), a first liquid infusion pipe 37 (not shown in the figure), a spray assembly and a first liquid discharge pipe (not shown in the figure), at least one spray assembly is arranged corresponding to the position of each packing layer 2, and the spray assembly comprises at least two spray water guns 3 evenly distributed around the packing layer 2 and installed on the outer peripheral wall of the tower body 1, The liquid outlet of the first cleaning pump is connected to the first end of the first liquid infusion pipe 37 through the first liquid infusion valve, the second end of the first liquid infusion pipe 37 is connected to each spray water gun 3, and the first liquid discharge pipe is connected to the bottom of the tower body 1; the packing layer 2 is provided with a receiving groove 21 at the position corresponding to the spray water gun 3, the gun head of the spray water gun 3 extends into the tower body 1 and is located in its corresponding receiving groove 21, the gun axis of the spray water gun 3 extends along the radial direction of the tower body 1, and the gun head can swing in the receiving groove 21 in a direction perpendicular to the gun axis, and the gun head after swinging can rotate around the gun axis.

[0044] The distillation device arranged in this way is provided with a spray water gun 3 around the packing layer 2, and the gun head of the spray water gun 3 can swing in the horizontal direction in the receiving groove 21, and the gun head after swinging can rotate around the gun axis, so as to realize comprehensive high-pressure cleaning of the packing layer, quickly wash away the stubborn dirt on the packing layer, have good cleaning effect and high cleaning efficiency, and the whole process can be realized by automation without consuming a lot of manpower, with short time and low cost, and little impact on production.

[0045] Preferably, the distillation device further comprises a second cleaning system, which comprises a second cleaning pump 41, a second liquid infusion pipe 42 and a second liquid discharge pipe 43. The liquid outlet of the second cleaning pump 41 is connected to the first end of the second liquid infusion pipe 42 through a second liquid infusion valve 45, the second end of the second liquid infusion pipe 42 is connected to the top of the tower body 1, the first end of the second liquid discharge pipe 43 is connected to the bottom of the tower body 1, the second end of the second liquid discharge pipe 43 is formed with a first liquid discharge sub-pipe 46 and a second liquid discharge sub-pipe 47, the first liquid discharge sub-pipe 46 is connected to the liquid inlet of the second cleaning pump 41 through a first liquid discharge valve 48, and the second liquid discharge sub-pipe 47 is connected to the waste liquid bin through a second liquid discharge valve 49. The liquid pumped by the first cleaning pump is clean water, and the liquid pumped by the second cleaning pump 41 is a descaling liquid.

[0046] In this way, the packing layer 2 is firstly rinsed with the descaling liquid by the second cleaning system, and then the packing layer 2 is fully cleaned with clean water by the first cleaning system, thereby greatly improving the cleaning efficiency.

[0047] like Figures 2 to 3 As shown, the spray water gun 3 includes a first drive unit (not shown in the figure), a second drive unit (not shown in the figure), a first pull rope 31, a second pull rope 32, a rope winding wheel group, a water gun housing 33, a water spray pipe 36, and a swing sleeve 34 and a mounting sleeve 35 arranged in sequence along the gun axis.

[0048] The water gun housing 33 can be rotatably installed on the outer peripheral wall of the tower body 1 around the gun axis, the mounting sleeve 35 is fixed on the water gun housing 33, the first end of the swing sleeve 34 is rotatably connected to the first end of the mounting sleeve 35 to form a swing axis, the swing sleeve 34 swings around the swing axis in a direction perpendicular to the gun axis, the water spray pipe 36 is inserted into the mounting sleeve 35 and the swing sleeve 34, the water spray pipe 36 extends out of the second end of the swing sleeve 34 to form a gun head, the water spray pipe 36 corresponding to the rotational connection position of the swing sleeve 34 and the mounting sleeve 35 is a flexible section, and the water spray pipe 36 extends out of the first end of the mounting sleeve 35 and is rotatably connected to the first infusion pipe 37.

[0049] The first drive unit and the rope winding wheel group are both installed on the water gun housing 33, and the first drive unit is connected to the rope winding wheel group in a transmission manner. The first end of the first pull rope 31 is connected to the swing sleeve 34 and is located on the first side of the water spray pipe 36, and the first end of the second pull rope 32 is connected to the swing sleeve 34 and is located on the second side of the water spray pipe 36. The second end of the first pull rope 31 is wound around the rope winding wheel group, and the second end of the second pull rope 32 is wound around the rope winding wheel group; the power output shaft of the first drive unit rotates forward, drives the rope winding wheel group to release the second pull rope 32 forward, tightens the first pull rope 31 backward, and the first pull rope 31 pulls the swing sleeve 34 and the water spray pipe 36 in the swing sleeve 34 to swing in the first direction; the power output shaft of the first drive unit rotates reversely, drives the rope winding wheel group to release the first pull rope 31 forward, tightens the second pull rope 32 backward, and the second pull rope 32 pulls the swing sleeve 34 and the water spray pipe 36 in the swing sleeve 34 to swing in the second direction.

[0050] The second driving unit is fixedly mounted on the outer peripheral wall of the tower body 1 . The second driving unit is in transmission connection with the water gun housing 33 . The second driving unit drives the water gun housing 33 to rotate relative to the first liquid infusion tube 37 .

[0051] The spray water gun 3 with the water spray pipe 36 and the first liquid infusion pipe 37 arranged in this way has a simple structure. The gun head can swing in the direction perpendicular to the gun axis in the accommodating groove 21, and the gun head, the rope winding wheel group, the water gun housing 33 and the first driving unit after swinging can rotate 360° around the gun axis as a whole under the drive of the second driving unit, thereby making the spray water gun 3 have a high degree of freedom, thereby improving the cleaning range of the spray water gun 3 on the packing layer 2.

[0052] Preferably, the water spray pipe 36 includes a gun head and a straight pipe body connected in sequence along the gun axis. The gun head is Y-shaped, including a first straight pipe part, a second straight pipe part 362 and a third straight pipe part 363 connected at one point. The first straight pipe part is connected to the straight pipe body to form a straight line. The second straight pipe part 362 and the third straight pipe part 363 are symmetrically arranged about the first straight pipe part. The angle between the second straight pipe part 362 and the third straight pipe part 363 is 30° to 80°. The plane where the gun head is located is coplanar with the swing plane of the swing sleeve 34. The first water spray sub-pipe 36 arranged in this way further increases the cleaning range of the spray water gun 3 on the packing layer 2 on the basis of the swing range of the swing sleeve 34.

[0053] Further preferably, the angle at which the gun head swings in a direction perpendicular to the gun axis is 40° to 75°. In this way, the second straight pipe portion 362 can be swung to be parallel to the outer peripheral wall of the tower body 1, and the third straight pipe portion 363 can be swung to be parallel to the outer peripheral wall of the tower body 1, thereby increasing the cleaning range of the spray water gun 3 on the packing layer 2, which is conducive to cleaning the packing completely without dead corners.

[0054] Further preferably, the included angle between the second straight tube portion 362 and the third straight tube portion 363 is 60° to 80°.

[0055] Preferably, three spray assemblies are arranged corresponding to the position of each packing layer 2, namely, the first spray assembly, the second spray assembly and the third spray assembly, the first spray assembly is arranged at the top of the packing layer 2, the second spray assembly is arranged at the middle of the packing layer 2, and the third spray assembly is arranged at the bottom of the packing layer 2; the spray water gun 3 of the first spray assembly and the spray water gun 3 of the second spray assembly are arranged in a one-to-one position corresponding to each other, and the spray water gun 3 of the second spray assembly and the spray water gun 3 of the third spray assembly are arranged in a one-to-one position corresponding to each other. The spray assemblies arranged in this way are conducive to the spray assemblies to fully clean the packing layer.

[0056] Further preferably, the distance between two adjacent spray guns 3 in the first spray assembly is less than 1.7 times the spray distance of the spray gun 3, the distance between two spray guns 3 corresponding to each other in the first spray assembly and the second spray assembly is less than 1.7 times the spray distance of the spray gun 3, the distance between two spray guns 3 corresponding to each other in the second spray assembly and the third spray assembly is less than 1.7 times the spray distance of the spray gun 3, and the diameter of the tower body 1 is less than 1.7 times the spray distance of the spray gun (3). The first, second and third spray assemblies thus arranged can achieve comprehensive cleaning of the entire packing layer 2, that is, the cleaning range of the first, second and third spray assemblies covers the entire packing layer 2.

[0057] Preferably, the rope winding wheel group includes a driving wheel 381, a first rope winding wheel 382 and a second rope winding wheel 383 installed in the water gun housing 33, the first rope winding wheel 382 is located on the first side of the water spray pipe 36, the second rope winding wheel 383 is located on the second side of the water spray pipe 36, the driving wheel 381 is located between the first rope winding wheel 382 and the second rope winding wheel 383, the first rope winding wheel 382 and the second rope winding wheel 383 are respectively connected to the driving wheel 381 in transmission, the first drive unit is connected to the driving wheel 381 in transmission, the second end of the first pull rope 31 is wound around the first rope winding wheel 382, ​​and the second end of the second pull rope 32 is wound around the second rope winding wheel 383.

[0058] In this embodiment, the driving wheel 381 is located below the mounting sleeve 35. Thus, the structure is simple.

[0059] Preferably, the rope winding wheel group also includes a first transition wheel 384 and a second transition wheel 385, the first transition wheel 384 is rotatably installed in the water gun housing 33 and is located on the first side of the mounting sleeve 35, and the second transition wheel 385 is rotatably installed in the water gun housing 33 and is located on the second side of the mounting sleeve 35; the second end of the first pull rope 31 is wound around the first transition wheel 384 and the first rope winding wheel 382 in sequence, and the second end of the second pull rope 32 is wound around the second transition wheel 385 and the second rope winding wheel 383 in sequence.

[0060] Specifically, in the present embodiment, the first rope winding wheel 382, ​​the second rope winding wheel 383, the first transition wheel 384 and the second transition wheel 385 are all placed horizontally.

[0061] Specifically, in this embodiment, the first rope winding wheel 382 includes a first gear portion and a first rotating wheel portion coaxially connected in sequence from bottom to top, the second rope winding wheel 383 includes a second gear portion and a second rotating wheel portion coaxially connected in sequence from bottom to top, the first gear portion and the second gear portion are respectively meshed with the driving wheel 381, the second end of the first pull rope 31 is sequentially wound around the first transition wheel 384 and the first rotating wheel portion, and the second end of the second pull rope 32 is sequentially wound around the second transition wheel 385 and the second rotating wheel portion in sequence.

[0062] Specifically, in this embodiment, the second end portion of the first pull rope 31 is fixedly connected to the first rope winding wheel 382 , and the second end portion of the second pull rope 32 is fixedly connected to the second rope winding wheel 383 .

[0063] Preferably, an assembly gap is formed between the water spray pipe 36 and the mounting sleeve 35, and the first pull rope 31 and the second pull rope 32 are both accommodated in the assembly gap. The first end of the first pull rope 31 extends out of the assembly gap and is connected to the swing sleeve 34, and the first end of the second pull rope 32 extends out of the assembly gap and is connected to the swing sleeve 34. A first through hole 352 and a second through hole 353 are provided on the tube wall of the mounting sleeve 35. The second end of the first pull rope 31 passes through the first through hole 352 and is wound around the rope winding wheel group, and the second end of the second pull rope 32 passes through the second through hole 353 and is wound around the rope winding wheel group.

[0064] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be 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; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0068] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A self-cleaning packed distillation device, characterized in that: It comprises a distillation tower body (1), a first cleaning system and at least two packing layers (2) arranged in sequence from bottom to top in the tower body (1); The first cleaning system comprises a first cleaning pump, a first liquid infusion pipe (37), a spray assembly and a first liquid discharge pipe, at least one spray assembly is arranged corresponding to the position of each packing layer (2), the spray assembly comprises at least two spray water guns (3) evenly distributed around the packing layer (2) and installed on the outer peripheral wall of the tower body (1), the liquid outlet of the first cleaning pump is connected to the first end of the first liquid infusion pipe (37) through the first liquid infusion valve, the second end of the first liquid infusion pipe (37) is connected to each spray water gun (3), and the first liquid discharge pipe is connected to the bottom of the tower body (1); A receiving groove (21) is provided at a position of the packing layer (2) corresponding to the spray water gun (3); a gun head of the spray water gun (3) extends into the tower body (1) and is located in the corresponding receiving groove (21); a gun axis of the spray water gun (3) extends radially along the tower body (1); the gun head can swing in a direction perpendicular to the gun axis in the receiving groove (21); and the gun head can rotate around the gun axis after swinging.

2. The self-cleaning packed distillation device according to claim 1, characterized in that: The invention also comprises a second cleaning system, the second cleaning system comprising a second cleaning pump (41), a second liquid infusion pipe (42) and a second liquid discharge pipe (43); the liquid outlet of the second cleaning pump (41) is connected to the first end of the second liquid infusion pipe (42) through a second liquid infusion valve (45); the second end of the second liquid infusion pipe (42) is connected to the top of the tower body (1); the first end of the second liquid discharge pipe (43) is connected to the bottom of the tower body (1); the second end of the second liquid discharge pipe (43) is formed with a first liquid discharge sub-pipe (46) and a second liquid discharge sub-pipe (47); the first liquid discharge sub-pipe (46) is connected to the liquid inlet of the second cleaning pump (41) through a first liquid discharge valve (48); and the second liquid discharge sub-pipe (47) is connected to the waste liquid bin through a second liquid discharge valve (49).

3. The self-cleaning packed distillation device according to claim 2, characterized in that: The liquid pumped by the first cleaning pump is clean water, and the liquid pumped by the second cleaning pump (41) is descaling liquid.

4. The self-cleaning packed distillation device according to claim 1, characterized in that: The spray water gun (3) comprises a first driving unit, a second driving unit, a first pull rope (31), a second pull rope (32), a rope winding wheel group, a water gun housing (33), a water spray pipe (36), and a swing sleeve (34) and a mounting sleeve (35) arranged in sequence along the gun axis; The water gun housing (33) is rotatably mounted on the outer peripheral wall of the tower body (1) around a gun axis; the mounting sleeve (35) is fixed on the water gun housing (33); the first end of the swing sleeve (34) is rotatably connected to the first end of the mounting sleeve (35) to form a swing axis; the swing sleeve (34) swings around the swing axis in a direction perpendicular to the gun axis; the water spray pipe (36) is inserted into the mounting sleeve (35) and the swing sleeve (34); the portion of the water spray pipe (36) extending out of the second end of the swing sleeve (34) forms a gun head; the water spray pipe (36) is a flexible section corresponding to the rotational connection position of the swing sleeve (34) and the mounting sleeve (35); the portion of the water spray pipe (36) extending out of the first end of the mounting sleeve (35) is rotatably connected to the first infusion pipe (37); The first drive unit and the rope winding wheel group are both installed on the water gun housing (33), the first drive unit is connected to the rope winding wheel group in a transmission manner, the first end of the first pull rope (31) is connected to the swing sleeve (34) and is located on the first side of the water spray pipe (36), the first end of the second pull rope (32) is connected to the swing sleeve (34) and is located on the second side of the water spray pipe (36), the second end of the first pull rope (31) is wound around the rope winding wheel group, and the second end of the second pull rope (32) is wound around the rope winding wheel group; the power output of the first drive unit The shaft rotates forward, driving the rope winding wheel group to release the second pull rope (32) forward and tighten the first pull rope (31) backward, and the first pull rope (31) pulls the swing sleeve (34) and the water spray pipe (36) in the swing sleeve (34) to swing in the first direction; the power output shaft of the first drive unit rotates reversely, driving the rope winding wheel group to release the first pull rope (31) forward and tighten the second pull rope (32) backward, and the second pull rope (32) pulls the swing sleeve (34) and the water spray pipe (36) in the swing sleeve (34) to swing in the second direction; The second drive unit is fixedly mounted on the outer peripheral wall of the tower body (1), and is in transmission connection with the water gun housing (33). The second drive unit drives the water gun housing (33) to rotate relative to the first liquid infusion tube (37).

5. The self-cleaning packed distillation device according to claim 4, characterized in that: The water spray pipe (36) comprises a gun head and a straight pipe body connected in sequence along the gun axis. The gun head is Y-shaped and comprises a first straight pipe portion, a second straight pipe portion (362) and a third straight pipe portion (363) connected at one point. The first straight pipe portion is connected to the straight pipe body to form a straight line. The second straight pipe portion (362) and the third straight pipe portion (363) are symmetrically arranged with respect to the first straight pipe portion. The angle between the second straight pipe portion (362) and the third straight pipe portion (363) is 30° to 80°. The plane where the gun head is located is coplanar with the swing plane of the swing sleeve (34).

6. The self-cleaning packed distillation device according to claim 5, characterized in that: The included angle between the second straight tube portion (362) and the third straight tube portion (363) is 60° to 80°.

7. The self-cleaning packed distillation device according to claim 6, characterized in that: Three spray assemblies are arranged corresponding to the position of each packing layer (2), namely a first spray assembly, a second spray assembly and a third spray assembly, the first spray assembly is arranged at the top of the packing layer (2), the second spray assembly is arranged at the middle of the packing layer (2), and the third spray assembly is arranged at the bottom of the packing layer (2); The spray water gun (3) of the first spray assembly and the spray water gun (3) of the second spray assembly are arranged in a one-to-one corresponding position, and the spray water gun (3) of the second spray assembly and the spray water gun (3) of the third spray assembly are arranged in a one-to-one corresponding position.

8. The self-cleaning packed distillation device according to claim 7, characterized in that: The spacing between two adjacent spray water guns (3) in the first spray assembly is less than 1.7 times the spray distance of the spray water gun (3); the spacing between two spray water guns (3) corresponding to each other in the first spray assembly and the second spray assembly is less than 1.7 times the spray distance of the spray water gun (3); the spacing between two spray water guns (3) corresponding to each other in the second spray assembly and the third spray assembly is less than 1.7 times the spray distance of the spray water gun (3); and the diameter of the tower body (1) is less than 1.7 times the spray distance of the spray water gun (3).

9. The self-cleaning packed distillation device according to claim 4, characterized in that: The rope winding wheel group comprises a driving wheel (381) installed in a water gun housing (33), a first rope winding wheel (382) and a second rope winding wheel (383), wherein the first rope winding wheel (382) is located on a first side of a water spray pipe (36), and the second rope winding wheel (383) is located on a second side of the water spray pipe (36), and the driving wheel (381) is located between the first rope winding wheel (382) and the second rope winding wheel (383), and the first rope winding wheel (382) and the second rope winding wheel (383) are respectively connected to the driving wheel (381 in transmission, and the first driving unit is connected to the driving wheel (381 in transmission, and the second end of the first pull rope (31) is wound around the first rope winding wheel (382), and the second end of the second pull rope (32) is wound around the second rope winding wheel (383).

10. The self-cleaning packed distillation device according to claim 4, characterized in that: An assembly gap is formed between the water spray pipe (36) and the installation sleeve (35), and the first pull rope (31) and the second pull rope (32) are both accommodated in the assembly gap. The first end of the first pull rope (31) extends out of the assembly gap and is connected to the swing sleeve (34), and the first end of the second pull rope (32) extends out of the assembly gap and is connected to the swing sleeve (34). A first through hole (352) and a second through hole (353) are provided on the wall of the installation sleeve (35) to oppose each other. The second end of the first pull rope (31) passes through the first through hole (352) and is wound around the rope winding wheel group, and the second end of the second pull rope (32) passes through the second through hole (353) and is wound around the rope winding wheel group.

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