Esterification synthesis reaction kettle for sodium carboxymethyl cellulose

Abstract

The utility model relates to the technical field of reaction kettles, and particularly discloses a sodium carboxymethyl cellulose esterification synthesis reaction kettle which comprises a reaction kettle body, a heating mechanism is arranged on one side of the reaction kettle body, a stirring mechanism is connected in the reaction kettle body and comprises a stirring shaft, a centrifugal disc is fixedly connected to the upper portion of the stirring shaft, and the centrifugal disc is fixedly connected to the lower portion of the stirring shaft. The heating mechanism comprises a heating box, a water inlet pipe and a water outlet pipe are respectively communicated between the upper part and the lower part of one side of the heating box and the reaction kettle, and a spiral pipe is connected between the water inlet pipe and the water outlet pipe; the spiral pipe is embedded in the reaction kettle, and the cross section of the spiral pipe is flat; according to the reaction kettle, the stirring sufficiency and the heating uniformity of raw materials can be improved, the layering phenomenon of the raw materials during reaction or the local high temperature or low temperature condition in the reaction kettle is avoided, and the reaction effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of reaction kettle, concretely relates to a sodium carboxymethyl cellulose esterification synthesis reaction kettle. BACKGROUND

[0002] The synthesis of sodium carboxymethyl cellulose is first alkalization process, and esterification reaction occurs between cellulose after alkalization and chloroacetic acid. During esterification reaction, the nucleophilic oxygen atom of sodium cellulose attacks the carbonyl carbon in chloroacetic acid, forms a tetrahedral intermediate, then the chlorine atom takes a pair of electrons and generates sodium carboxymethyl cellulose.

[0003] To ensure esterification synthesis efficiency, the temperature of the reaction kettle needs to be maintained within a certain range, and the raw materials need to be continuously stirred. When the raw materials are stirred and mixed, a single stirring structure cannot be fully and uniformly stirred, and stratification may occur. In addition, if the heating method or heating structure distribution of the heating device is unreasonable, local high or low temperature may also exist, affecting the reaction effect.

[0004] Therefore, the skilled person in the art provides a sodium carboxymethyl cellulose esterification synthesis reaction kettle to solve the problems raised in the background art. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a sodium carboxymethyl cellulose esterification synthesis reaction kettle, which solves the following technical problems:

[0006] How to improve the fullness of stirring and the uniformity of heating, avoid stratification or local high or low temperature of raw materials, and ensure the reaction effect.

[0007] The purpose of the utility model can be achieved by the following technical solutions:

[0008] A sodium carboxymethyl cellulose esterification synthesis reaction kettle, comprising a reaction kettle, a heating mechanism is arranged on one side of the reaction kettle, and a turnover stirring mechanism is connected in the reaction kettle;

[0009] The turnover stirring mechanism comprises a stirring shaft, a centrifugal disc is fixedly connected above the stirring shaft, a plurality of stirring blades are rotatably connected below the stirring shaft, and a plurality of discharge holes are formed in the stirring blades.

[0010] The heating mechanism comprises a heating box, water inlet pipes and water outlet pipes are respectively communicated between the heating box and the reaction kettle on one side and below, a spiral pipe is connected between the water inlet pipe and the water outlet pipe, the spiral pipe is embedded in the reaction kettle, and the cross section of the spiral pipe is flat.

[0011] Further, the water outlet pipe is connected with a liquid supply pump, the output end of the liquid supply pump extends into the reaction kettle and communicates with the end of the spiral pipe, and the input end of the liquid supply pump communicates with the heating box.

[0012] Further, the bottom of the heating box is fixedly connected with a heating rod, the lower side of the heating box is connected with a temperature sensor, the bottom of the heating box is fixedly connected with a support frame, the outer side of the heating box is fixedly connected with a controller, and the controller is in electrical connection with the liquid supply pump, the heating rod and the temperature sensor.

[0013] Further, the upper side of the reaction kettle is connected with a feeding pipe, the lower middle of the reaction kettle is connected with a discharging pipe, and the outer sides of the reaction kettle and the heating box are fixedly connected with heat preservation layers.

[0014] Further, a plurality of arc-shaped grooves are arranged at equal intervals on the outer side of the stirring shaft, the middle of the stirring blade is fixedly connected with a connecting rod, one end of the connecting rod is fixedly connected with a ball head, and the ball head is rotatably connected in the arc-shaped groove.

[0015] Further, a limiting rod is rotatably connected to the middle of the ball head, and the limiting rod penetrates through the arc-shaped groove in the transverse direction and is fixedly connected with the stirring shaft.

[0016] Further, a plurality of through holes are formed in the centrifugal disc, and the discharge port of the feeding pipe is located above the centrifugal disc on one side.

[0017] Further, the stirring blade is arranged in a flat elliptical shape, the top of the reaction kettle is fixedly connected with a motor, the output end of the motor extends into the reaction kettle and is fixedly connected with the stirring shaft, the bottom of the stirring shaft is fixedly connected with a stirring paddle, and the stirring paddle is attached to the inner bottom of the reaction kettle.

[0018] The utility model discloses a beneficial effect:

[0019] (1) the utility model discloses a turnover mechanism, when using, the raw material enters the reaction kettle through the feeding pipe, and the centrifugal disc evenly scatters the material to the inner bottom of the reaction kettle, simultaneously, a plurality of stirring blades and the stirring paddle at the bottom synchronous operation, and the material is turned over and stirred, and the motor can make the stirring blade stir at different angles by changing the rotating speed, thereby can realize the turnover action, and the fullness and uniformity of raw material stirring are improved.

[0020] (2) the utility model discloses a heating mechanism, when reacting, the liquid in the heating box is heated to the appropriate temperature, and then the liquid supply pump pumps the heated liquid into the spiral pipe to circulate and heat, and the hot flow can flow uniformly in the pipeline, so that the uniformity of heating is improved, and the cross section of the spiral pipe is arranged in a flat shape, so that the heating contact area with the reaction kettle is increased, the heating efficiency is improved, the material in the reaction kettle reaches the required reaction temperature more quickly, and the reaction effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further described below with reference to the drawings.

[0022] Figure 1 It is the three-dimensional connection structure schematic diagram of the utility model;

[0023] Figure 2 It is the internal connection structure schematic diagram of the utility model;

[0024] Figure 3 It is the connection structure schematic diagram of the turning over and stirring mechanism of the utility model;

[0025] Figure 4 It is the connection structure schematic diagram of the connecting rod and the stirring shaft of the utility model;

[0026] Figure 5 It is Figure 3 The enlarged view of A in figure 1.

[0027] Reference signs:

[0028] 1, reaction kettle;2, turning over and stirring mechanism;3, heating mechanism;4, controller;5, feed pipe;6, discharge pipe;7, heat preservation layer;8, support frame;21, motor;22, stirring shaft;23, connecting rod;24, stirring blade;241, discharging hole;25, stirring paddle;26, centrifugal disc;261, through hole;27, arc-shaped groove;28, ball head;29, limiting rod;31, heating box;32, water inlet pipe;33, water outlet pipe;34, liquid supply pump;35, heating rod;36, temperature sensor;37, spiral pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than 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 protection scope of the utility model.

[0030] Embodiment one

[0031] Please refer to the drawings Figures 1-5 In the utility model embodiment, a sodium carboxymethyl cellulose esterification synthesis reaction kettle, including reaction kettle 1, the one side of reaction kettle 1 is provided with heating mechanism 3, heating mechanism 3 is used for heating the raw materials in the reaction kettle, ensures that it is in the suitable temperature and reacts, accelerates the reaction rate, and the reaction kettle 1 is connected with turning over and stirring mechanism 2, turning over and stirring mechanism 2 can quickly mix the raw materials uniformly, and turning over and stirring mechanism 2 and heating mechanism 3 cooperate with each other, so that the raw materials are heated uniformly.

[0032] The stirring mechanism 2 comprises a stirring shaft 22, a centrifugal disc 26 is fixedly connected above the stirring shaft 22, a plurality of through holes 261 are formed in the centrifugal disc 26, the through holes 261 facilitate the raw materials on the centrifugal disc 26 to fall faster, the discharge port of the feeding pipe 5 is located above one side of the centrifugal disc 26, and then the raw materials enter the reaction kettle 1 through the feeding pipe 5 and directly fall to the edge of the centrifugal disc 26, under the rotating action of the stirring shaft 22, the centrifugal disc 26 generates a centrifugal force to uniformly throw and disperse the materials to the bottom of the reaction kettle 1;

[0033] A plurality of stirring blades 24 are rotationally connected below the stirring shaft 22, when the stirring blades 24 rotate with the stirring shaft 22, under the double action of the centrifugal force and the speed change of the motor 21, the stirring blades 24 gradually rotate upwards or downwards to stir the areas at different heights in the reaction kettle 1, avoid stirring dead angles, and help to break the stratification of the materials, so that the materials of different densities can be better mixed together, a plurality of discharge holes 241 are formed in the stirring blades 24, the existence of the discharge holes 241 enables the materials to pass through the stirring blades 24 more freely during stirring, forms a complex material flow path, further improves the uniformity and sufficiency of stirring, is beneficial to the esterification reaction, improves the reaction conversion rate and product performance, the stirring blades 24 are arranged in a flat oval shape, the flat arrangement facilitates to increase the contact area with the materials, and the oval shape can reduce the stress at the end to enable the stirring blades 24 to better perform the stirring action;

[0034] A plurality of arc-shaped grooves 27 are formed at equal intervals on the outer side of the stirring shaft 22, a connecting rod 23 is fixedly connected to the middle of the stirring blade 24, a ball head 28 is fixedly connected to one end of the connecting rod 23, the ball head 28 is rotationally connected in the arc-shaped groove 27, the cooperation between the ball head 28 and the arc-shaped groove 27 can reduce the friction during rotation, and the materials entering the arc-shaped groove 27 can slide along the arc of the arc-shaped groove 27, cooperating with the rotating ball head 28, can effectively prevent the materials from being stuck in the arc-shaped groove 27.

[0035] A limiting rod 29 is rotationally connected to the middle of the ball head 28, the limiting rod 29 penetrates the arc-shaped groove 27 transversely and is fixedly connected with the stirring shaft 22, so that the rotating direction of the stirring blade 24 is limited, so that the plurality of stirring blades 24 will not interfere with each other, but only swing up and down to perform the stirring action.

[0036] The motor 21 is fixedly connected to the top of the reaction kettle 1, the motor 21 can make the stirring blades 24 stir at different angles in the longitudinal direction by changing the speed, the output end of the motor 21 extends into the reaction kettle 1 and is fixedly connected with the stirring shaft 22, the stirring shaft 22 is fixedly connected with a stirring paddle 25 at the bottom, the stirring paddle 25 is attached to the bottom of the reaction kettle 1, which facilitates to improve the sufficiency of stirring.

[0037] Example two

[0038] Based on the embodiment one, please refer to the attached Figures 1-2 The heating mechanism 3 comprises a heating box 31, and an inlet water pipe 32 and an outlet water pipe 33 are communicated with the reaction kettle 1 on the upper and lower sides of one side of the heating box 31 respectively, a spiral pipe 37 is connected between the inlet water pipe 32 and the outlet water pipe 33, the spiral pipe 37 is embedded in the reaction kettle 1, and the cross section of the spiral pipe 37 is arranged in a flat shape, the outlet water pipe 33 is connected with a liquid supply pump 34, the output end of the liquid supply pump 34 extends into the reaction kettle 1 and is communicated with the end of the spiral pipe 37, the input end of the liquid supply pump 34 is communicated with the heating box 31, after the liquid in the heating box 31 is heated to a suitable temperature, the liquid supply pump 34 pumps the heated liquid into the spiral pipe 37 for circulating heating, the hot flow can flow uniformly in the spiral pipe 37, so that the uniformity of heating is improved, the cross section of the spiral pipe 37 is arranged in a flat shape, so that the heating contact area with the reaction kettle is increased, the heating efficiency is improved, the material in the reaction kettle can reach the required reaction temperature more quickly, and the reaction effect is ensured.

[0039] A heating rod 35 is fixedly connected to the bottom of the heating box 31, the heating rod 35 heats the liquid in the heating box 31, a temperature sensor 36 is connected below the heating box 31, the temperature sensor 36 can monitor the temperature of the liquid in the box in real time, so that the temperature of the liquid is heated and kept in a suitable range, an exhaust port is communicated with the top of the heating box 31, a support frame 8 is fixedly connected to the bottom of the heating box 31, a controller 4 is fixedly connected to the outer side of the heating box 31, and the controller 4 is electrically connected with the liquid supply pump 34, the heating rod 35 and the temperature sensor 36.

[0040] An inlet pipe 5 is communicated with the upper side of the reaction kettle 1, an outlet pipe 6 is communicated with the lower middle of the reaction kettle 1, a heat preservation layer 7 is fixedly connected to the outer sides of the reaction kettle 1 and the heating box 31, and necessary valves are connected to the plurality of pipelines in the scheme, and the specific setting is the prior art, which is not described in detail.

[0041] The above embodiment of the utility model has been described in detail, but the content described can only be the preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the application range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A sodium carboxymethyl cellulose esterification synthesis reactor, comprising a reactor (1), characterized in that, One side of the reaction kettle (1) is provided with a heating mechanism (3), the reaction kettle (1) is connected with a turnover stirring mechanism (2); The turnover stirring mechanism (2) comprises a stirring shaft (22), a centrifugal disc (26) is fixedly connected above the stirring shaft (22), a plurality of stirring blades (24) are rotatably connected below the stirring shaft (22), and a plurality of discharge holes (241) are formed in the stirring blades (24). The heating mechanism (3) comprises a heating box (31), water inlet pipes (32) and water outlet pipes (33) are respectively communicated between the heating box (31) and the reaction kettle (1) on the side and above and below, a spiral pipe (37) is connected between the water inlet pipes (32) and the water outlet pipes (33), the spiral pipe (37) is embedded in the reaction kettle (1), and the cross section of the spiral pipe (37) is arranged in a flat shape.

2. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: The water outlet pipe (33) is connected with a liquid supply pump (34), the output end of the liquid supply pump (34) extends into the reaction kettle (1) and is communicated with the end of the spiral pipe (37), and the input end of the liquid supply pump (34) is communicated with the heating box (31).

3. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: A heating rod (35) is fixedly connected to the bottom of the heating box (31), a temperature sensor (36) is connected below the heating box (31), the bottom of the heating box (31) is fixedly connected with a support frame (8), the outer side of the heating box (31) is fixedly connected with a controller (4), and the controller (4) is in electrical connection with the liquid supply pump (34), the heating rod (35) and the temperature sensor (36).

4. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: A feeding pipe (5) is communicated with one side above the reaction kettle (1), a discharging pipe (6) is communicated with the middle below the reaction kettle (1), and heat preservation layers (7) are fixedly connected to the outer sides of the reaction kettle (1) and the heating box (31).

5. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: A plurality of arc-shaped grooves (27) are formed at equal intervals on the outer side of the stirring shaft (22), a connecting rod (23) is fixedly connected to the middle of the stirring blade (24), a ball head (28) is fixedly connected to one end of the connecting rod (23), and the ball head (28) is rotatably connected in the arc-shaped groove (27).

6. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: A limiting rod (29) is rotatably connected to the middle of the ball head (28), and the limiting rod (29) penetrates the arc-shaped groove (27) transversely and is fixedly connected with the stirring shaft (22).

7. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 4, characterized in that: A plurality of through holes (261) are formed in the centrifugal disc (26), and the discharge port of the feeding pipe (5) is located above one side of the centrifugal disc (26).

8. The carboxymethyl sodium cellulose esterification synthesis reactor according to claim 1, characterized in that: The stirring blade (24) is arranged in a flat oval shape, a motor (21) is fixedly connected to the top of the reaction kettle (1), the output end of the motor (21) extends into the reaction kettle (1) and is fixedly connected with the stirring shaft (22), a stirring paddle (25) is fixedly connected to the bottom of the stirring shaft (22), and the stirring paddle (25) is attached to the inner bottom of the reaction kettle (1).

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