Concentrating kettle for producing 2-acrylamido-2-methylpropanesulfonic acid

Abstract

The utility model discloses a concentration kettle for producing 2-acrylamido-2-methylpropanesulfonic acid, which comprises a concentration kettle evaporation section, the top of the concentration kettle evaporation section is provided with a gas phase outlet, a liquid collecting cover is arranged above the gas phase outlet, the section of the liquid collecting cover is trapezoidal, and the section of the liquid collecting cover is provided with a liquid outlet. And the bottom of the concentration kettle evaporation section is communicated with an evaporation section lower sealing head. According to the utility model, an operator introduces cold water into the cooling water inlet pipe and then discharges the cold water from the cooling water outlet pipe, so that the environment in the working cavity is subjected to first-stage cooling, part of heat in the working cavity is transferred into heat-conducting oil in the heat-conducting cavity, and the heat in the heat-conducting oil is transferred to the outside of the crystallization section of the concentration kettle through the heat-conducting block; and through cooperation with the fan and the blades, the environment in the working cavity is indirectly subjected to second-stage cooling, an operator can start the motor to drive the multiple stirring rods to rotate synchronously, then the environment in the working cavity is subjected to third-stage cooling, and the device has the advantage of being good in cooling effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concentration kettle, concretely to a concentration kettle for producing 2-acrylamido-2-methylpropanesulfonic acid. BACKGROUND

[0002] In the production process of 2-acrylamido-2-methylpropanesulfonic acid, 90% acetic acid is needed to recrystallize and purify 2-acrylamido-2-methylpropanesulfonic acid, and then filter and dry to obtain the product. Generally, the mother liquor contains about 15% 2-acrylamido-2-methylpropanesulfonic acid, and this part of the product is usually difficult to recover. In the synthesis of 90% acetic acid mother liquor containing 2-acrylamido-2-methylpropanesulfonic acid, selecting a suitable concentration kettle, concentration temperature and concentration time is the key to the success of recovering 2-acrylamido-2-methylpropanesulfonic acid from the mother liquor.

[0003] The utility model patent discloses a kind of novel concentration kettles for producing 2-acrylamido-2-methylpropanesulfonic acid, which solves the problem that the existing equipment is a jacketed kettle, by passing into steam in the jacket, the acetic acid is evaporated under negative pressure, 15% 2-acrylamido-2-methylpropanesulfonic acid often polymerizes, and cannot be continuously recovered. The temperature control is relatively stable during the recovery of 2-acrylamido-2-methylpropanesulfonic acid, and the recovery rate of 2-acrylamido-2-methylpropanesulfonic acid in the mother liquor reaches 80%. The structure of this method is simple, but in actual use, the crystallization section of the concentration kettle is only cooled by cooling water, the cooling method is single, which leads to poor cooling effect. UTILITY MODEL CONTENTS

[0004] To solve the problems raised in the above background art, the purpose of the utility model is to provide a concentration kettle for producing 2-acrylamido-2-methylpropanesulfonic acid, which has the advantage of good cooling effect.

[0005] To achieve the above object, the utility model provides the following technical scheme: A production 2 -acrylamide - 2 - methyl propane sulfonic acid is with concentration kettle, including concentration kettle evaporation section, the top of concentration kettle evaporation section is provided with gas phase export, the top of gas phase export is provided with liquid trap cover, the cross section of liquid trap cover is trapezoidal, the bottom of concentration kettle evaporation section is connected with evaporation section lower end cover, the bottom of evaporation section lower end cover is connected with downcomer, the lower end of downcomer is connected with reducing pipe, the below of concentration kettle evaporation section is provided with concentration kettle concentration section, the below of concentration kettle evaporation section is provided with concentration kettle crystallization section, the concentration kettle crystallization section includes heat conduction chamber and working chamber, the inside of heat conduction chamber is provided with heat conduction oil, the inside fixedly connected of heat conduction chamber has heat conduction block, the number of heat conduction block is several, the end of heat conduction block away from downcomer extends to the outside of concentration kettle crystallization section, the top fixedly connected of concentration kettle crystallization section has annular slide rail, the inside slidingly connected of annular slide rail has sliding block, the top fixedly connected of sliding block has gear ring, the inner wall fixedly connected of concentration kettle crystallization section has fixed block, the number of fixed block is several, the inside rotatably connected of fixed block has stirring rod, the top fixedly connected of stirring rod has gear, the gear is engaged with gear ring, the surface of concentration kettle concentration section is fixedly connected with motor through support, the output of motor is fixedly connected with gear, the surface of working chamber is connected with cooling water inlet pipe, cooling water outlet pipe and cooling water discharge pipe respectively.

[0006] As the utility model is preferred, the surface of the gear ring is fixedly connected with the blades, the number of the blades is several, and the blades are evenly distributed on the surface of the gear ring in a ring shape.

[0007] As the utility model is preferred, the bottom of the concentration kettle crystallization section is fixedly connected with the cover plate, the bottom of the cover plate is provided with the discharge valve, and the discharge valve is communicated with the working chamber.

[0008] As the utility model is preferred, the surface of the concentration kettle crystallization section is fixedly connected with the air pipe through the support, the inside of the air pipe is fixedly connected with the fan through the support, the number of the air pipe is several, and the air pipe is evenly distributed on the surface of the concentration kettle crystallization section in a ring shape.

[0009] As the utility model is preferred, the top and the bottom of the air pipe are fixedly connected with the dustproof net through the bolts.

[0010] As the utility model is preferred, the inside of the fixed block is fixedly connected with the bearing, the outer ring of the bearing is fixedly connected with the fixed block, the inner ring of the bearing is fixedly connected with the stirring rod.

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

[0012] 1. The utility model discloses a cooling effect is good to the device that the operator imports cold water to cooling water inlet pipe, then exports from cooling water outlet pipe, further to the environment of working cavity carries out first -class cooling, and the partial heat in working cavity is transferred to the heat conduction oil in heat conduction cavity, and the heat in heat conduction oil is transferred to the outside of the crystallization section of concentration kettle through heat conduction block, and through cooperation with fan and blade, further indirectly to the environment in working cavity carries out second -class cooling, and the operator can start motor and drive multiple stirring rod synchronous rotation, further to the environment in working cavity carries out third -class cooling, and the device has the advantage of good cooling effect.

[0013] 2. The utility model discloses through the setting of blade, and the gear ring rotation drives blade rotation, can increase the air flow rate of heat conduction block surface to a certain extent, further indirectly improve the heat dissipation efficiency of heat conduction oil, further indirectly improve the heat dissipation efficiency of the internal environment of working cavity. ACCOUNT OF DRAWINGS

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

[0015] Figure 2 It is the structure front cross section schematic drawing of the crystallization section of concentration kettle of the utility model;

[0016] Figure 3 It is the utility model Figure 1 The structure amplification schematic drawing of A place in the middle;

[0017] Figure 4 It is the utility model Figure 2 The structure amplification schematic drawing of B place in the middle.

[0018] In the drawing: 1, the evaporation section of concentration kettle;2, gas phase export;3, liquid collecting cover;4, evaporation section lower end cover;5, downcomer;6, reducing pipe;7, concentration kettle concentration section;8, concentration kettle crystallization section;9, heat conduction cavity;10, working cavity;11, discharge valve;12, cooling water inlet pipe;13, cooling water outlet pipe;14, cooling water discharge pipe;15, cover plate;16, annular slide rail;17, sliding block;18, gear ring;19, fixed block;20, stirring rod;21, gear;22, motor;23, blade;24, air pipe;25, dust screen;26, heat conduction block. 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. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0020] AsFigures 1 to 4 As shown in the figure, a production 2-propylene amide-2-methyl propane sulfonic acid is provided with a concentration kettle, which comprises an evaporation section 1 of the concentration kettle, a gas phase outlet 2 is arranged at the top of the evaporation section 1 of the concentration kettle, a liquid collecting cover 3 is arranged above the gas phase outlet 2, the cross section of the liquid collecting cover 3 is trapezoidal, a lower head 4 of the evaporation section is communicated with the bottom of the evaporation section 1 of the concentration kettle, a downcomer 5 is communicated with the bottom of the lower head 4, a reducing pipe 6 is communicated with the lower end of the downcomer 5, a concentration section 7 of the concentration kettle is arranged below the evaporation section 1 of the concentration kettle, a crystallization section 8 of the concentration kettle is arranged below the evaporation section 1 of the concentration kettle, the crystallization section 8 of the concentration kettle comprises a heat conduction cavity 9 and a working cavity 10, heat conduction oil is arranged in the heat conduction cavity 9, a plurality of heat conduction blocks 26 are fixedly connected in the heat conduction cavity 9, one end of the heat conduction block 26 away from the downcomer 5 extends to the outside of the crystallization section 8 of the concentration kettle, an annular slide rail 16 is fixedly connected to the top of the crystallization section 8 of the concentration kettle, a sliding block 17 is slidably connected in the annular slide rail 16, a gear ring 18 is fixedly connected to the top of the sliding block 17, a plurality of fixed blocks 19 are fixedly connected to the inner wall of the crystallization section 8 of the concentration kettle, a stirring rod 20 is rotatably connected in the fixed block 19, a gear wheel 21 is fixedly connected to the top of the stirring rod 20, the gear wheel 21 is engaged with the gear ring 18, an electric motor 22 is fixedly connected to the surface of the concentration section 7 of the concentration kettle through a support, the output end of the electric motor 22 is fixedly connected with the gear wheel 21, the surface of the working cavity 10 is respectively communicated with a cooling water inlet pipe 12, a cooling water outlet pipe 13 and a cooling water discharge pipe 14.

[0021] Reference Figure 1 , Figure 2 and Figure 4 The surface of the gear ring 18 is fixedly connected with a plurality of blades 23, the blades 23 are evenly distributed on the surface of the gear ring 18 in a ring shape.

[0022] As a technical optimization scheme of the utility model, through the setting of the blades 23, the rotation of the gear ring 18 drives the rotation of the blades 23, which can increase the air flow rate on the surface of the heat conduction block 26 to a certain extent, thereby indirectly improving the heat dissipation efficiency of the heat conduction oil, and further indirectly improving the heat dissipation efficiency of the internal environment of the working cavity 10.

[0023] Reference Figures 1 to 3 The bottom of the crystallization section 8 of the concentration kettle is fixedly connected with a cover plate 15, the bottom of the cover plate 15 is provided with a discharge valve 11, and the discharge valve 11 is communicated with the working cavity 10.

[0024] As a technical optimization scheme of the utility model, through the setting of the cover plate 15 and the discharge valve 11, the cover plate 15 can seal the heat conduction cavity 9, and the discharge valve 11 can discharge the material in the working cavity 10.

[0025] Reference Figures 1 to 3The surface of the concentration kettle crystallization section 8 is fixedly connected with air pipes 24 through supports, the inside of the air pipes 24 is fixedly connected with fans through supports, the number of the air pipes 24 is several, and the air pipes 24 are evenly distributed in the surface of the concentration kettle crystallization section 8 in a ring shape.

[0026] As a technical optimization scheme of the utility model, through the setting of the air pipes 24 and the fans, the operator starts the fans, so that the fans blow upward, the airflow generated by the rotation of the blades 23 is also upward, thereby greatly increasing the air flow rate of the surface of the heat conduction block 26, thereby indirectly improving the heat dissipation efficiency of the heat conduction oil, and thereby indirectly improving the heat dissipation efficiency of the environment in the working cavity 10.

[0027] Reference Figures 1 to 3 The top and bottom of the air pipe 24 are fixedly connected with dustproof nets 25 through bolts.

[0028] As a technical optimization scheme of the utility model, through the setting of the dustproof nets 25, the airflow entering the air pipe 24 can be filtered and dedusted.

[0029] Reference Figure 2 And Figure 4 The inside of the fixed block 19 is fixedly connected with a bearing, the outer ring of the bearing is fixedly connected with the fixed block 19, and the inner ring of the bearing is fixedly connected with the stirring rod 20.

[0030] As a technical optimization scheme of the utility model, through the setting of the bearing, the friction between the fixed block 19 and the stirring rod 20 can be reduced, thereby facilitating the rotation of the stirring rod 20.

[0031] The working principle and use process of the utility model: when in use, the operator pours cold water into the cooling water inlet pipe 12, and then discharges the cold water from the cooling water outlet pipe 13, at this time, the cooling water discharge valve 14 is in a closed state, thereby performing first-stage cooling on the environment in the working cavity 10, part of the heat in the working cavity 10 is transferred to the heat conduction oil in the heat conduction cavity 9, the heat in the heat conduction oil is transferred to the outside of the concentration kettle crystallization section 8 through the heat conduction block 26, and through cooperation with the fan and the blade 23, thereby indirectly performing second-stage cooling on the environment in the working cavity 10.

[0032] The left side of the evaporation section 1 of the concentration kettle is provided with a heater, the heater, the evaporation section 1 of the concentration kettle, the gas phase outlet 2, the liquid collecting cover 3, the evaporation section lower head 4, the downcomer 5, the reducing pipe 6 and the concentration section 7 of the concentration kettle are respectively the same as the heater, the evaporation section of the concentration kettle, the gas phase outlet, the liquid collecting cover, the evaporation section lower head, the downcomer, the reducing pipe and the concentration section of the concentration kettle in the utility model patent with publication (announcement) No. CN205307823U, the principle is the same, the same effect is realized, and the application will not be described in detail.

[0033] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A concentration still for producing 2-acrylamido-2-methylpropane sulfonic acid comprising a concentration still evaporation section (1) characterized by: The top of the evaporation section (1) of the concentration kettle is provided with a gas phase outlet (2), the upper side of the gas phase outlet (2) is provided with a liquid collecting cover (3), the cross section of the liquid collecting cover (3) is trapezoidal, the bottom of the evaporation section (1) is communicated with an evaporation section lower end cover (4), the bottom of the evaporation section lower end cover (4) is communicated with a downcomer (5), the lower end of the downcomer (5) is communicated with a reducing pipe (6), the lower side of the evaporation section (1) is provided with a concentration kettle concentration section (7), the lower side of the evaporation section (1) is provided with a concentration kettle crystallization section (8), the concentration kettle crystallization section (8) comprises a heat conduction cavity (9) and a working cavity (10), the inside of the heat conduction cavity (9) is provided with heat conduction oil, the inside of the heat conduction cavity (9) is fixedly connected with heat conduction blocks (26), the number of the heat conduction blocks (26) is several, one end of the heat conduction blocks (26) away from the downcomer (5) extends to the outside of the concentration kettle crystallization section (8), the top of the concentration kettle crystallization section (8) is fixedly connected with an annular slide rail (16), the inside of the annular slide rail (16) is slidably connected with a sliding block (17), the top of the sliding block (17) is fixedly connected with a gear ring (18), the inner wall of the concentration kettle crystallization section (8) is fixedly connected with fixed blocks (19), the number of the fixed blocks (19) is several, the inside of the fixed blocks (19) is rotatably connected with stirring rods (20), the top of the stirring rods (20) is fixedly connected with gears (21), the gears (21) are engaged with the gear ring (18), the surface of the concentration kettle concentration section (7) is fixedly connected with a motor (22) through a support, the output end of the motor (22) is fixedly connected with the gears (21), the surface of the working cavity (10) is respectively communicated with a cooling water inlet pipe (12), a cooling water outlet pipe (13) and a cooling water discharge pipe (14).

2. A concentration still for producing 2-acrylamido-2-methylpropanesulfonic acid according to claim 1, characterized in that: The surface of the gear ring (18) is fixedly connected with blades (23), the number of the blades (23) is several, the blades (23) are evenly distributed on the surface of the gear ring (18) in a ring shape.

3. A concentration still for producing 2-acrylamido-2-methylpropanesulfonic acid according to claim 1, characterized in that: The bottom of the concentration kettle crystallization section (8) is fixedly connected with a cover plate (15), the bottom of the cover plate (15) is provided with a discharge valve (11), the discharge valve (11) is communicated with the working cavity (10).

4. A concentration still for producing 2-acrylamido-2-methylpropanesulfonic acid according to claim 1, characterized in that: The surface of the concentration kettle crystallization section (8) is fixedly connected with air pipes (24) through supports, the inside of the air pipes (24) is fixedly connected with fans through supports, the number of the air pipes (24) is several, the air pipes (24) are evenly distributed on the surface of the concentration kettle crystallization section (8) in a ring shape.

5. A concentration still for producing 2-acrylamido-2-methylpropanesulfonic acid according to claim 4, characterized in that: The top and bottom of the air pipes (24) are fixedly connected with dustproof nets (25) through bolts.

6. A concentration still for producing 2-acrylamido-2-methylpropanesulfonic acid according to claim 1, characterized in that: The inside of the fixed blocks (19) is fixedly connected with bearings, the outer ring of the bearings is fixedly connected with the fixed blocks (19), and the inner ring of the bearings is fixedly connected with the stirring rods (20).

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