Neutralization reaction device in production process of super absorbent resin

Abstract

The utility model relates to the field of neutralization reaction devices, in particular to a neutralization reaction device in the production process of super absorbent resin, which comprises a neutralization tank. When neutralization is needed, acrylic acid and sodium hydroxide are respectively put in from the corresponding inlet pipes, then the motor is started to stir the acrylic acid and the sodium hydroxide, and during filling, the water tank can be started to enable the water pump in the water tank to enable water to flow into the side wall of the neutralization tank from the water inlet pipe; then the water flows into the water tank again from the water outlet pipe to form a circulation so as to keep a low-temperature effect in the water tank all the time, and then the cooling rod is suspended in the neutralization tank, so that the internal temperature can reach a certain balance without stabilizing the temperature of the inner wall; after the reaction is finished, a valve is started to enable the reaction liquid to enter a filtering tank to remove insoluble impurities in the reaction liquid, the filtrate is evaporated and concentrated to obtain sodium acrylate, and the sodium acrylate is subjected to subsequent treatment to obtain a target product, so that the temperature is not easy to rise quickly.

Description

Technical Field

[0001] This utility model relates to the technical field of neutralization reaction devices, and in particular to a neutralization reaction device in the production process of superabsorbent resin. Background Technology

[0002] In the neutralization reaction process of hyaluronic acid production, the raw materials are acrylic acid and sodium hydroxide. The reaction must ensure that the sodium hydroxide reacts completely and that the degree of neutralization of the acrylic acid is 75%. In actual operation, the neutralization reaction temperature is required to not exceed 40°C. Temperature control is usually achieved by controlling the rate of addition of alkali solution during the reaction, which is not only complicated to operate but also prone to errors.

[0003] Patent number CN211988662U discloses a neutralization reaction device in the production process of superabsorbent resin, comprising a device body, an outer shell, a stirring shaft and a stirring motor cooperating with the stirring shaft, stirring blades on the stirring shaft, an acrylic acid inlet pipe and a sodium hydroxide inlet pipe at the upper part of the device body, a flow meter and a first valve on the acrylic acid inlet pipe, a second valve on the sodium hydroxide inlet pipe, and a product outlet at the lower part of the device body, which is connected to a filter device through a pipeline.

[0004] Although cooling can be achieved, it cannot be guaranteed that the temperature of the condensate will rise during use, which would exceed the required temperature and be detrimental to the neutralization reaction. Utility Model Content

[0005] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a neutralization reaction device in the production process of highly absorbent resin to solve the existing problems.

[0007] To achieve the above objectives, the technical solution of this utility model is: a neutralization reaction device in the production process of superabsorbent resin, comprising a neutralization tank, an acrylic acid inlet pipe and a sodium hydroxide inlet pipe respectively provided on both sides of the top of the neutralization tank, a motor provided on the top of the neutralization tank, a stirring rack provided inside the neutralization tank and connected to the motor, the side wall of the neutralization tank being hollow, multiple cooling rods provided on the inner wall of the neutralization tank, the cooling rods being hollow inside and communicating with the side wall of the neutralization tank, an inlet pipe and an outlet pipe connected to the outer wall of the neutralization tank, the inlet pipe and the outlet pipe being connected to a water tank, a filter tank provided at the bottom of the neutralization tank, the filter tank being connected to the neutralization tank via a conduit with a valve in the conduit, a support frame provided at the bottom of the filter tank, and a discharge port provided in the middle of the bottom of the filter tank.

[0008] In some embodiments, the stirring rack includes a stirring rod with multiple stirring plates and multiple through holes, and the stirring plates are arranged alternately with the cooling rod.

[0009] In some embodiments, a star-shaped blade is provided in the through hole.

[0010] In some embodiments, the side wall of the filter tank is provided with a pull-out groove, the pull-out groove is provided with a filter box, the top of the filter box is provided with an opening, and the bottom of the filter box is provided with a filter screen.

[0011] In some embodiments, the filter screen has an upward-convex arc shape in the middle.

[0012] In some embodiments, the filter box has a handle on its outer wall.

[0013] In some embodiments, the outlet pipe is equipped with a temperature detector.

[0014] By adopting the above technical solution, the beneficial effects of this utility model are as follows: When neutralization is required, acrylic acid and sodium hydroxide are respectively put into the corresponding inlet pipes, and then the motor is started to stir them. During the filling, the water tank can be started to allow the internal water pump to flow water from the inlet pipe into the side wall of the neutralization tank, and then flow back into the water tank from the outlet pipe to form a circulation to keep the inside at a low temperature. Then, by suspending the cooling rod in the neutralization tank, the internal temperature can reach a certain balance, rather than just stabilizing the temperature of the inner wall. After completion, the valve is started to let it enter the filter tank to remove incompatible impurities from the reaction liquid. The filtrate is evaporated and concentrated to obtain sodium acrylate. Sodium acrylate is then subjected to subsequent processing to obtain the target product. This prevents the temperature from rising too quickly.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0017] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the neutralization reaction device according to some embodiments of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the neutralization reaction device in some embodiments of the present invention;

[0023] Figure 3 This is a schematic diagram of the cooling rod distribution in some embodiments of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0025] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0029] Reference Figure 1-3This utility model provides a neutralization reaction device in the production process of superabsorbent resin, including a neutralization tank 1. The top of the neutralization tank 1 is provided with an acrylic acid inlet pipe 11 and a sodium hydroxide inlet pipe 12 on both sides. The top of the neutralization tank 1 is provided with a motor 4. The neutralization tank 1 is provided with a stirring rack 3 inside the neutralization tank 1, and the stirring rack 3 is connected to the motor 4. The side wall of the neutralization tank 1 is hollow. The inner wall of the neutralization tank 1 is provided with multiple cooling rods 14. The cooling rods 14 are hollow inside and communicate with the side wall of the neutralization tank 1. The outer wall of the neutralization tank 1 is connected with a water inlet pipe 15 and a water outlet pipe 16. The water inlet pipe 15 and the water outlet pipe 16 are connected to a water tank 13. The bottom of the neutralization tank 1 is provided with a filter tank 2. The filter tank 2 is connected to the neutralization tank 1 through a conduit 21. The conduit 21 is provided with a valve 22. The bottom of the filter tank 2 is provided with a support frame 23. The bottom center of the filter tank 2 is provided with a discharge port 24.

[0030] When neutralization is required, acrylic acid and sodium hydroxide are added into their respective inlet pipes, and then motor 4 is started to stir them. During the filling process, water tank 13 can be started to allow the internal water pump to flow water from inlet pipe 15 into the side wall of neutralization tank 1, and then flow back into water tank 13 from outlet pipe 16 to form a circulation, so that the inside can always maintain a low temperature. Then, the cooling rod 14 is suspended in the neutralization tank 1, so that the internal temperature can reach a certain balance, rather than just stabilizing the temperature of the inner wall. After completion, valve 22 is started to let it enter the filter tank 2 to remove incompatible impurities from the reaction solution. The filtrate is evaporated and concentrated to obtain sodium acrylate. Sodium acrylate is then subjected to further processing to obtain the target product. This process prevents the temperature from rising too quickly.

[0031] According to some embodiments of this utility model, optionally, the stirring rack 3 includes a stirring rod 31, on which multiple stirring plates 32 are provided, and each stirring plate 32 has multiple through holes 33. The stirring plates 32 and the cooling rod 14 are arranged alternately. The alternating arrangement of the stirring plates 32 and the cooling rod 14 prevents them from getting stuck and unable to stir during stirring, and the through holes 33 allow for more even stirring and can reduce the resistance of the stirring plates 32.

[0032] According to some embodiments of this utility model, optionally, a star-shaped blade 34 is provided in each of the through holes 33. Because sodium hydroxide is a solid, it can be cut to ensure uniform mixing.

[0033] According to some embodiments of this utility model, optionally, the side wall of the filter tank 2 is provided with a pull-out groove 25, and a filter box 26 is provided in the pull-out groove 25. The top of the filter box 26 is provided with an opening 27, and the bottom of the filter box 26 is provided with a filter screen 28. This facilitates the removal of impurities by pulling out the filter box 26, and protective measures should be taken during operation.

[0034] According to some embodiments of this utility model, optionally, the filter screen 28 has an upwardly convex arc shape in the middle. This allows impurities to slide off to the edges when liquid flows in, preventing them from concentrating in the middle and slowing down the filtration process.

[0035] According to some embodiments of this utility model, optionally, the filter box 26 is provided with a handle 29 on its outer wall. This facilitates pulling out the filter box 26.

[0036] According to some embodiments of this utility model, optionally, a temperature detector 17 is provided on the water outlet pipe 16. This allows for easy monitoring of the outflowing temperature, enabling effective control to keep it below 40°C.

[0037] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0038] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0039] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A neutralization reaction apparatus in the production process of superabsorbent resin, characterized in that, Include: The neutralization tank is provided with acrylic acid inlet pipe and sodium hydroxide inlet pipe on both sides of the top, and is provided with a motor at the top. A stirring frame is arranged in the neutralization tank and is connected with the motor. The side wall of the neutralization tank is hollow, and the inner wall is provided with a plurality of cooling rods which are hollow and communicated with the side wall. The outer wall of the neutralization tank is connected with water inlet pipe and water outlet pipe which are connected with a water tank. The bottom of the neutralization tank is provided with a filter tank which is connected with the neutralization tank through a conduit provided with a valve. The bottom of the filter tank is provided with a support frame, and the middle of the bottom is provided with a discharge port.

2. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 1, characterized by: The stirring frame comprises a stirring rod provided with a plurality of stirring plates, and the stirring plates are provided with a plurality of through holes and are arranged alternately with the cooling rods.

3. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 2, characterized by: The through holes are provided with star-shaped blades.

4. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 1, characterized by: The side wall of the filter tank is provided with a pull-out groove, and the pull-out groove is provided with a filter box which is provided with an opening at the top and a filter screen at the bottom.

5. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 4, characterized by: The filter screen is upwardly convex in the middle.

6. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 4, characterized by: The outer wall of the filter box is provided with a handle.

7. The neutralization reaction apparatus in a superabsorbent resin production process according to claim 1, characterized by: The water outlet pipe is provided with a temperature detector.

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