2-acrylamido-2-methylpropanesulfonic acid distillation equipment

Abstract

The utility model discloses 2-acrylamido-2-methylpropanesulfonic acid distillation equipment which comprises a tank body, the top of the tank body is fixedly connected with a cover plate through bolts, and the top of the cover plate is fixedly connected with a motor. An operator starts the motor to rotate to drive the rotating shaft to rotate so as to drive the film removing stirring paddle and the annular stirring frame to rotate, the annular stirring frame rotates to stir materials in the lower part of the evaporation tank, and the lower part of the evaporation tank is spherical; the annular stirring frame can drive a plurality of stirring rods to rotate during rotation, so that the materials at the lower part of the evaporation tank are further stirred, and the annular stirring frame rotates to drive a spiral conveying rod to rotate, so that the materials at the lower part in the lower part of the evaporation tank are conveyed upwards; the device disclosed by the utility model has the advantages of good stirring effect and high distillation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to 2 -acrylamido -2 -methylpropane sulfonic acid technical field, concretely is 2 -acrylamido -2 -methylpropane sulfonic acid distillation equipment. BACKGROUND

[0002] The synthesis of 2-acrylamido-2-methylpropane sulfonic acid can be divided into one-step method and two-step method. The one-step method is to react raw materials acrylonitrile, isobutene and oleum together at a proper temperature, and then separate the product 2-acrylamido-2-methylpropane sulfonic acid. The two-step method is to first sulfonate isobutene with oleum or SO3 at low temperature in the presence of a reaction solvent to obtain a sulfonated intermediate, and then react the sulfonated intermediate with acrylonitrile in the presence of sulfuric acid, and then separate the product 2-acrylamido-2-methylpropane sulfonic acid. Both methods require an excess of acrylonitrile as a solvent. In the synthesis of 2-acrylamido-2-methylpropane sulfonic acid, selecting a suitable evaporator is the key to the quality and recovery rate of the recovered acrylonitrile.

[0003] The utility model patent with publication (announcement) number CN205307822U discloses a kind of new evaporator for producing 2-acrylamido-2-methylpropane sulfonic acid, which solves the problem that currently domestic all adopts 10m³ kettle with jacket to distill. This method generally transfers 5t material into the kettle with jacket at one time, heats up by jacket, and distills under vacuum state. The defect of this method is that the residence time of the material is long, generally about 10 hours, the polymerization of acrylonitrile cannot be controlled, and the evaporation capacity is small, about 0.5t per hour under the same recovery process. The temperature of the heating medium during evaporation is lower than that of the traditional evaporator, the polymerization of acrylonitrile is easy to control, the recovery rate of acrylonitrile reaches 99.3%, the purity is higher than 99.5%, the evaporation capacity is greater than 3.5t / h, and the temperature of the heating medium is less than 55℃. This way is simple in structure, but in actual use, the stirring shaft drives the membrane removal stirring paddle and anchor stirrer to rotate to stir the material. Although this way is simple in structure, the contact area between the anchor stirrer and the material is small, which leads to poor stirring effect and cannot uniformly stir the material. SUMMARY

[0004] To solve the problems raised in the background art, the purpose of the present utility model is to provide a 2-acrylamido-2-methylpropane sulfonic acid distillation equipment with good stirring effect and high distillation efficiency.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: 2-acrylamide-2-methyl propane sulfonic acid distillation equipment, including jar body, the top of jar body is connected with the cover plate through bolt fixing, the top of cover plate is connected with motor fixedly, the inside rotation of cover plate is connected with the shaft, the output of motor is connected with the shaft fixedly, the surface of the shaft is connected with the film removing paddle fixedly, the surface of the shaft is connected with annular stirring frame fixedly, the inner wall of annular stirring frame is connected with stirring rod fixedly, the number of stirring rod is several, the inner wall of annular stirring frame is connected with spiral conveying rod fixedly.

[0006] As the utility model is preferred, the jar body includes evaporation tank upper part, evaporation tank reducing part and evaporation tank lower part, the bottom of evaporation tank lower part is connected with electromagnetic discharge valve, the evaporation tank lower part is spherical, and the evaporation tank reducing part is fixedly connected with the evaporation tank lower part.

[0007] As the utility model is preferred, the surface of evaporation tank upper part and the surface of evaporation tank reducing part are fixedly connected with flange, and the upper and lower two flanges are fixedly connected through bolt and nut.

[0008] As the utility model is preferred, the bottom of the shaft is fixedly connected with the fan blade.

[0009] As the utility model is preferred, the inner wall of annular stirring frame is fixedly connected with the knob, and the number of knob is several.

[0010] As the utility model is preferred, the inner wall of evaporation tank reducing part is fixedly connected with stabilizing frame, and the stabilizing frame is rotatably connected with the shaft through bearing.

[0011] Compared with the prior art, the utility model has the advantages as follows:

[0012] 1, the utility model discloses the operator starts motor rotation and drives the rotation of the shaft, and then drives the rotation of the film removing paddle and annular stirring frame, and the rotation of annular stirring frame can stir the material in the lower part of evaporation tank, and the lower part of evaporation tank is spherical, and the annular stirring frame can uniformly stir the material in contact with the inner wall of the lower part of evaporation tank when rotating, and the rotation of annular stirring frame can drive the rotation of multiple stirring rods, and then further stir the material in the lower part of evaporation tank, and the rotation of annular stirring frame drives the rotation of spiral conveying rod, and then upwardly conveys the material below the inside of the lower part of evaporation tank, and then efficiently stirs the material in the lower part of evaporation tank, and the device has the advantages of good stirring effect and high distillation efficiency.

[0013] 2, the utility model discloses a through the setting of evaporation tank upper portion, evaporation tank reducing portion and evaporation tank lower portion can conveniently assemble the jar body, through the setting of electromagnetic discharge valve, can discharge the material in evaporation tank lower portion, the lower portion of evaporation tank is spherical and is arranged, cooperates with annular stirring frame, avoids the material adhesion in the inner wall of evaporation tank lower portion, and further improves the effect of stirring. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is the jar body structure front view sectional view schematic diagram of the utility model;

[0016] Figure 3 It is the annular stirring frame structure schematic diagram of the utility model;

[0017] Figure 4 It is the utility model Figure 1 It is the structure enlarged schematic diagram of A place in the utility model.

[0018] In the drawing: 1, jar body;2, cover plate;3, motor;4, rotating shaft;5, membrane removal stirring paddle;6, annular stirring frame;7, stirring rod;8, spiral conveying rod;9, evaporation tank upper portion;10, evaporation tank reducing portion;11, evaporation tank lower portion;12, electromagnetic discharge valve;13, flange;14, fan blade;15, push block;16, stabilizing frame. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0020] As Figures 1 to 4As shown, 2-propylene amide-2-methyl propane sulfonic acid distillation equipment, including the tank body 1, the top of the tank body 1 is bolted to the cover plate 2, the top of the cover plate 2 is fixedly connected with the motor 3, the inside of the cover plate 2 is rotatably connected with the shaft 4, the output end of the motor 3 is fixedly connected with the shaft 4, the surface of the shaft 4 is fixedly connected with the film removal stirring paddle 5, the surface of the shaft 4 is fixedly connected with the annular stirring frame 6, the inner wall of the annular stirring frame 6 is fixedly connected with the stirring rod 7, the number of the stirring rod 7 is several, the inner wall of the annular stirring frame 6 is fixedly connected with the spiral conveying rod 8, the surface of the tank body 1 is provided with a heating jacket for heating the material in the lower part 11 of the evaporation tank, the outside of the tank body 1 is provided with a condensing mechanism, and the tank body 1 and the condensing mechanism are communicated through a gas conveying pipeline. The above-mentioned heating jacket and film removal stirring paddle 5 are similar to the jacket and film removal stirring paddle mentioned in the utility model patent with publication (announcement) No. CN205307822U for producing 2-propylene amide-2-methyl propane sulfonic acid, and the same effect is achieved. The present application will not be described in detail. The above-mentioned condensing mechanism is a mature technology, and the present application will not be described in detail.

[0021] Reference Figure 1 , Figure 2 and Figure 4 , the tank body 1 includes the evaporation tank upper part 9, the evaporation tank variable diameter part 10 and the evaporation tank lower part 11, the bottom of the evaporation tank lower part 11 is communicated with the electromagnetic discharge valve 12, the evaporation tank lower part 11 is spherical, and the evaporation tank variable diameter part 10 is fixedly connected with the evaporation tank lower part 11.

[0022] As a technical optimization scheme of the utility model, through the setting of the evaporation tank upper part 9, the evaporation tank variable diameter part 10 and the evaporation tank lower part 11, the tank body 1 can be assembled conveniently, through the setting of the electromagnetic discharge valve 12, the material in the evaporation tank lower part 11 can be discharged, the lower part of the evaporation tank is spherical, which cooperates with the annular stirring frame 6 to avoid the adhesion of the material to the inner wall of the evaporation tank lower part 11, thereby improving the stirring effect.

[0023] Reference Figure 1 , Figure 2 and Figure 4 , the surface of the evaporation tank upper part 9 and the surface of the evaporation tank variable diameter part 10 are fixedly connected with the flanges 13, and the upper and lower two flanges 13 are fixedly connected through bolts and nuts.

[0024] As a technical optimization scheme of the utility model, through the setting of the flanges 13, the operator can conveniently disassemble and assemble the evaporation tank upper part 9 and the evaporation tank variable diameter part 10, thereby conveniently maintaining the components in the tank body 1.

[0025] Reference Figure 2 and Figure 3 , the bottom of the shaft 4 is fixedly connected with the fan blade 14.

[0026] As the technical optimization scheme of the utility model, through the setting of the fan blade 14, the rotation of the rotating shaft 4 drives the rotation of the fan blade 14, and then the gaseous material formed by the evaporation of the material in the lower part 11 of the evaporation tank is conveniently transported upwards.

[0027] Reference Figure 2 And Figure 3 The inner wall of the annular stirring frame 6 is fixedly connected with the poking block 15, and the number of the poking block 15 is several.

[0028] As the technical optimization scheme of the utility model, through the setting of the poking block 15, the rotation of the annular stirring frame 6 drives the rotation of the poking block 15, and then the material in the lower part 11 of the evaporation tank is stirred, and then the stirring effect of the device is improved.

[0029] Reference Figure 2 The inner wall of the evaporation tank variable diameter part 10 is fixedly connected with the stabilizing frame 16, and the stabilizing frame 16 is rotatably connected with the rotating shaft 4 through the bearing.

[0030] As the technical optimization scheme of the utility model, through the setting of the stabilizing frame 16, the rotating shaft 4 can be supported and limited, and then the stability of the rotating shaft 4 during rotation is improved.

[0031] The working principle and use process of the utility model: when using, the operator can start the motor 3 to rotate and drive the rotating shaft 4 to rotate, and then drive the membrane-removing stirring paddle 5 and the annular stirring frame 6 to rotate, the rotation of the annular stirring frame 6 can stir the material in the lower part 11 of the evaporation tank, the lower part 11 of the evaporation tank is spherical, and when the annular stirring frame 6 rotates, the material in contact with the inner wall of the lower part 11 of the evaporation tank can be uniformly stirred, the rotation of the annular stirring frame 6 can drive the plurality of stirring rods 7 to rotate, and then the material in the lower part 11 of the evaporation tank is further stirred, the rotation of the annular stirring frame 6 drives the spiral conveying rod 8 to rotate, and then the material below the inside of the lower part 11 of the evaporation tank is transported upwards, and then the material in the lower part 11 of the evaporation tank is efficiently stirred, and then the efficiency of distillation is improved.

[0032] It should be noted that in this text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Distillation apparatus for 2-acrylamido-2-methylpropane sulfonic acid comprising a tank body (1), characterized in that: The top of the tank body (1) is bolted and connected with a cover plate (2), the top of the cover plate (2) is fixedly connected with a motor (3), the inside of the cover plate (2) is rotatably connected with a rotating shaft (4), the output end of the motor (3) is fixedly connected with the rotating shaft (4), the surface of the rotating shaft (4) is fixedly connected with a film removing stirring paddle (5), the surface of the rotating shaft (4) is fixedly connected with an annular stirring frame (6), the inner wall of the annular stirring frame (6) is fixedly connected with a stirring rod (7), the number of the stirring rod (7) is several, the inner wall of the annular stirring frame (6) is fixedly connected with a spiral conveying rod (8).

2. The 2-acrylamidoglycolic acid distillation apparatus of claim 1, wherein: The tank body (1) comprises an evaporation tank upper part (9), an evaporation tank reducing part (10) and an evaporation tank lower part (11), the bottom of the evaporation tank lower part (11) is communicated with an electromagnetic discharge valve (12), the evaporation tank reducing part (10) is fixedly connected with the evaporation tank lower part (11).

3. The 2-acrylamidoglycolic acid distillation apparatus of claim 2, wherein: The surface of the evaporation tank upper part (9) and the surface of the evaporation tank reducing part (10) are both fixedly connected with flanges (13), and the two flanges (13) are fixedly connected by bolts and nuts.

4. The 2-acrylamidoglycolic acid distillation apparatus of claim 1, wherein: The bottom of the rotating shaft (4) is fixedly connected with a fan blade (14).

5. The 2-acrylamidoglycolic acid distillation apparatus of claim 1, wherein: The inner wall of the annular stirring frame (6) is fixedly connected with a poking block (15), and the number of the poking block (15) is several.

6. The 2-acrylamidoglycolic acid distillation apparatus of claim 2, wherein: The inner wall of the evaporation tank reducing part (10) is fixedly connected with a stabilizing frame (16), and the stabilizing frame (16) is rotatably connected with the rotating shaft (4) through a bearing.

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