Mixing device for preparing modified kaolin

Abstract

The invention relates to the technical field of kaolin preparation, in particular to a mixing device for modified kaolin preparation, which comprises a reaction kettle, a heat preservation shell fixedly sleeves the outer side of the reaction kettle, a temperature control mechanism for heat preservation of the reaction kettle is arranged on the side surface of the heat preservation shell, and a feed hopper is fixedly inserted into the top of the reaction kettle. A cleaning mechanism for cleaning kaolin powder on the inner wall of the reaction kettle is arranged in the reaction kettle; a rotating air cylinder is controlled to drive an L-shaped rod to rotate in the forward direction, so that a groove formed in the side face of an electric heating block is attached to the outer wall of a feeding hopper, the electric heating block is started to heat the feeding hopper and preheat kaolin powder in the feeding hopper, moisture and impurities adsorbed on the surface of the feeding hopper are conveniently removed, and therefore the intercalation reaction activity is improved; in the stirring process, clear water in the disc is uniformly splashed towards the periphery under the action of centrifugal force, so that not only is the kaolin powder effectively cleaned, but also the situation that too much deionized water is injected and the concentration of an intercalation agent is reduced is avoided, and the intercalation effect is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of kaolin preparation, in particular to a mixing device for preparing modified kaolin. Background Art

[0002] Modified kaolin is a specially treated non-metallic mineral material, the main components of which are alumina, silicon dioxide and water. Modified kaolin has good physical and chemical properties such as plasticity, fire resistance and high whiteness. In the process of preparing modified kaolin, it is necessary to add the calcined kaolin powder into the reactor, add deionized water and stir evenly, then add the intercalation agent, and then carry out water bath insulation and stirring reaction. When kaolin powder is stirred and mixed with deionized water in a conventional reactor, the kaolin powder easily adheres to the inner wall of the reactor, making it difficult to clean it effectively. If too much deionized water is added, the concentration of the intercalant is reduced, affecting the intercalation effect. At the same time, when performing the intercalation reaction, the temperature in the reactor needs to be accurately controlled to heat up and cool down. However, after the conventional reactor is heated up, it is difficult to quickly and accurately cool down to the optimal temperature for the intercalation reaction because an insulation layer is provided on the outside, affecting the efficiency of the intercalation reaction. Summary of the invention

[0003] The technical problems solved by this solution are: (1) How to solve the problem that kaolin powder easily adheres to the inner wall of the reactor, making it difficult to clean effectively, and adding too much deionized water reduces the concentration of the intercalation agent, affecting the intercalation effect; (2) How to solve the problem that after the existing reactor is heated up, it is inconvenient to quickly and accurately cool down to the optimal temperature for the intercalation reaction, which affects the efficiency of the intercalation reaction.

[0004] The object of the present invention can be achieved by the following technical scheme: A mixing device for preparing modified kaolin, comprising a reactor, a heat-insulating shell is fixedly sleeved on the outside of the reactor, a temperature control mechanism for keeping the reactor warm is arranged on the side of the heat-insulating shell, a feed hopper is fixedly inserted on the top of the reactor, a first control valve is fixedly installed in the middle of the feed hopper, and a cleaning mechanism for cleaning kaolin powder on the inner wall of the reactor is arranged inside the reactor; The temperature control mechanism comprises a water storage box fixedly connected to the heat preservation shell, a water pump is fixedly arranged on the front of the water storage box, an input end of the water pump is connected to the bottom of the water storage box, and an output end of the water pump is connected to a drain pipe.

[0005] A further technical improvement of the present invention lies in that: a heat conduction pipe is sleeved at the bottom of the outer wall of the reaction kettle, the heat conduction pipe is fixedly connected to the inner wall of the heat preservation shell, and the input end of the heat conduction pipe is communicated with the output end of the drain pipe. A water return pipe is communicated with the top of the back surface of the water storage box, and the input end of the water return pipe is communicated with the output end of the heat conduction pipe.

[0006] A further technical improvement of the present invention lies in that: a rotary cylinder is fixedly installed on the top of the heat preservation shell, the output end of the rotary cylinder is fixedly installed with an L-shaped rod, one end of the L-shaped rod is fixedly installed with an electric heating block, the electric heating block is located in the water storage box, and a groove is opened on the side surface of the electric heating block. The size and position of the groove correspond to those of the feed hopper. By driving the L-shaped rod to rotate reversely through the rotary cylinder, the electric heating block is immersed below the liquid level of the clear water in the water storage box, and the clear water in the water storage box is heated to a set temperature. After stirring is completed, a plurality of electric heating plates are controlled to heat the reaction kettle. When the temperature exceeds the threshold value, the electric heating plates are timely turned off, and then the water pump is turned on, so that the warm water at the set temperature in the water storage box enters the heat conduction pipe along the drain pipe, and then flows back into the water storage box through the water return pipe. The warm water flowing in the heat conduction pipe not only quickly absorbs the excess heat in the reaction kettle, but also insulates the subsequent reaction kettle. This process quickly and accurately cools down to the optimal temperature for the intercalation reaction, avoiding affecting the efficiency of the intercalation reaction.

[0007] A further technical improvement of the present invention lies in that: the cleaning mechanism includes a guide frame fixedly connected to the inner wall of the reaction kettle. A square rod is movably inserted on the guide frame. The square rod is horizontally arranged, and one end of the square rod movably penetrates through the reaction kettle and is rotatably provided with a roller. The roller is in rolling connection with the middle part of the L-shaped rod.

[0008] A further technical improvement of the present invention lies in that: a water storage tank is fixedly installed on the top of the inner wall of the reaction kettle. An opening is opened on the top of the water storage tank. A water inlet pipe is communicated with the top of the reaction kettle, and the position of the output end of the water inlet pipe corresponds to the position of the opening.

[0009] A further technical improvement of the present invention lies in that: a baffle is fixedly installed at the end of the square rod away from the roller. A tension spring is fixedly connected between the baffle and the guide frame. A push-pull rod is fixedly connected to the side surface of the baffle facing the water storage tank. A piston is fixedly installed at one end of the push-pull rod.

[0010] A further technical improvement of the present invention lies in that: a water outlet pipe is fixedly communicated with the bottom of the side surface of the water storage tank, the diameter of the piston is the same as the inner diameter of the water outlet pipe, and the position of the piston corresponds to the position of the water outlet pipe; by controlling the rotation of the rotary cylinder to drive the L-shaped rod to rotate forward, the groove formed on the side surface of the electric heating block is attached to the outer wall of the feed hopper, and the electric heating block is turned on to heat the feed hopper, so as to preheat the kaolin powder therein, facilitating the removal of the adsorbed moisture and impurities on its surface, thereby improving the activity of the intercalation reaction; during the process of several stirring paddles stirring the kaolin powder mixed with deionized water, the L-shaped rod rotates reversely to provide a thrust to the roller, so that the push-pull rod drives the piston to extend into the water storage tank, facilitating the deionized water in the water storage tank to flow along the water outlet pipe into the disc. At this time, the stirring shaft is in a rotating state, so that the clear water in the disc is evenly sprinkled around due to the action of centrifugal force, facilitating the deionized water to flow down along the inner wall of the reaction kettle, not only effectively cleaning the kaolin powder, but also avoiding adding too much deionized water, reducing the concentration of the intercalating agent, and ensuring the effect of intercalation.

[0011] A further technical improvement of the present invention lies in that: a stirring shaft is rotatably arranged inside the reaction kettle, the stirring shaft is longitudinally arranged, and a disc is fixedly installed in the middle and upper part of the stirring shaft. The position of the disc is below the output end of the water outlet pipe, and several stirring paddles are fixedly installed in the middle and lower part of the stirring shaft.

[0012] Compared with the prior art, the beneficial effects of the present invention are: When the present invention is in use, by controlling the rotation of the rotary cylinder to drive the L-shaped rod to rotate forward, the groove formed on the side surface of the electric heating block is attached to the outer wall of the feed hopper, and the electric heating block is turned on to heat the feed hopper, so as to preheat the kaolin powder therein, facilitating the removal of the adsorbed moisture and impurities on its surface, thereby improving the activity of the intercalation reaction; during the process of several stirring paddles stirring the kaolin powder mixed with deionized water, the L-shaped rod rotates reversely to provide a thrust to the roller, so that the push-pull rod drives the piston to extend into the water storage tank, facilitating the deionized water in the water storage tank to flow along the water outlet pipe into the disc. At this time, the stirring shaft is in a rotating state, so that the clear water in the disc is evenly sprinkled around due to the action of centrifugal force, facilitating the deionized water to flow down along the inner wall of the reaction kettle, not only effectively cleaning the kaolin powder, but also avoiding adding too much deionized water, reducing the concentration of the intercalating agent, and ensuring the effect of intercalation.

[0013] When the present invention is in use, the rotary cylinder drives the L-shaped rod to rotate in the reverse direction, so that the electric heating block is immersed below the liquid level of the clear water in the water storage box, and the clear water in the water storage box is heated to a set temperature. After the stirring is completed, several electric heating plates are controlled to heat the reaction kettle. When the temperature exceeds the threshold value, the electric heating plates are promptly turned off, and then the water pump is turned on, so that the warm water reaching the set temperature in the water storage box enters the heat conduction tube along the drain pipe, and then flows back into the water storage box through the return pipe. The warm water flowing through the heat conduction tube not only quickly absorbs the excess heat in the reaction kettle, but also insulates the subsequent reaction kettle. This process quickly and accurately cools down to the optimal temperature for the intercalation reaction, avoiding affecting the efficiency of the intercalation reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 Schematic three-dimensional view of the overall structure of the present invention; Figure 2 Front structural sectional view of the overall structure of the present invention; Figure 3 Schematic view of the temperature control mechanism structure of the present invention; Figure 4 Schematic three-dimensional view of the partial structure of the temperature control mechanism of the present invention; Figure 5 Schematic view of the cleaning mechanism structure of the present invention; Figure 6 Schematic three-dimensional view of the partial structure of the cleaning mechanism of the present invention.

[0016] In the figure: 1, feed hopper; 2, first control valve; 3, temperature control mechanism; 4, control panel; 5, heat preservation shell; 6, thermometer; 7, reaction kettle; 8, water inlet pipe; 9, cleaning mechanism; 10, stirring shaft; 11, blanking pipe; 12, drive motor; 13, heat conduction tube; 14, electric heating plate; 301, rotary cylinder; 302, L-shaped rod; 303, electric heating block; 304, water storage box; 305, water pump; 306, water outlet pipe; 307, return pipe; 901, drain pipe; 902, push-pull rod; 903, disc; 904, piston; 905, water storage tank; 906, opening; 907, square rod; 908, roller; 909, guide frame; 910, baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-6 As shown, a mixing device for preparing modified kaolin includes a reaction kettle 7. A heat preservation shell 5 is fixedly sleeved on the outer side of the reaction kettle 7. A temperature control mechanism 3 for heat preservation of the reaction kettle 7 is arranged on the side surface of the heat preservation shell 5. A feed hopper 1 is fixedly inserted at the top of the reaction kettle 7. A first control valve 2 is fixedly installed in the middle of the feed hopper 1. A cleaning mechanism 9 for cleaning kaolin powder on the inner wall of the reaction kettle 7 is arranged inside the reaction kettle 7.

[0019] Please refer to Figure 3 and Figure 4 As shown, the above-mentioned temperature control mechanism 3 includes a water storage box 304 fixedly connected to the heat preservation shell 5. A water pump 305 is fixedly arranged on the front surface of the water storage box 304. The input end of the water pump 305 is communicated with the bottom of the water storage box 304, and the output end of the water pump 305 is communicated with a water outlet pipe 306.

[0020] Please refer to Figure 3 and Figure 4 As shown, a heat conduction pipe 13 is sleeved on the bottom of the outer wall of the above-mentioned reaction kettle 7. The heat conduction pipe 13 is fixedly connected to the inner wall of the heat preservation shell 5. The input end of the heat conduction pipe 13 is communicated with the output end of the water outlet pipe 306. A return water pipe 307 is communicated with the top of the back surface of the water storage box 304. The input end of the return water pipe 307 is communicated with the output end of the heat conduction pipe 13.

[0021] Please refer to Figure 3 and Figure 4 As shown, a rotary cylinder 301 is fixedly installed on the top of the above-mentioned heat preservation shell 5. The output end of the rotary cylinder 301 is fixedly installed with an L-shaped rod 302. One end of the L-shaped rod 302 is fixedly installed with an electric heating block 303. The electric heating block 303 is located inside the water storage box 304. A groove is formed on the side surface of the electric heating block 303. The size and position of the groove correspond to those of the feed hopper 1. By driving the L-shaped rod 302 to rotate reversely through the rotary cylinder 301, the electric heating block 303 is immersed below the liquid level of the clear water in the water storage box 304, heating the clear water in the water storage box 304 to a set temperature. After stirring is completed, control several electric heating plates 14 to heat the reaction kettle 7. When the temperature exceeds the threshold value, promptly turn off the electric heating plates 14, and then turn on the water pump 305, so that the warm water at the set temperature in the water storage box 304 enters the heat conduction pipe 13 along the water outlet pipe 306, and then flows back to the water storage box 304 through the return water pipe 307. The warm water flowing in the heat conduction pipe 13 not only quickly absorbs the excess heat in the reaction kettle 7, but also insulates the subsequent reaction kettle 7. This process quickly and accurately cools down to the optimal temperature for the intercalation reaction, avoiding affecting the efficiency of the intercalation reaction.

[0022] Please refer to Figure 2 and Figure 5As shown, the above-mentioned cleaning mechanism 9 includes a guiding frame 909 fixedly connected to the inner wall of the reaction kettle 7. A square rod 907 is movably inserted on the guiding frame 909. The square rod 907 is horizontally arranged, and one end of the square rod 907 movably penetrates through the reaction kettle 7, and a roller 908 is rotatably arranged. The roller 908 is in rolling connection with the middle part of the L-shaped rod 302.

[0023] Please refer to Figure 5 As shown, a water storage tank 905 is fixedly installed at the top of the inner wall of the above-mentioned reaction kettle 7. An opening 906 is formed at the top of the water storage tank 905. A water inlet pipe 8 is communicated with the top of the reaction kettle 7. The output end position of the water inlet pipe 8 corresponds to the position of the opening 906.

[0024] Please refer to Figure 5 and Figure 6 As shown, a baffle 910 is fixedly installed at one end of the square rod 907 away from the roller 908. A tension spring is fixedly connected between the baffle 910 and the guiding frame 909. A push-pull rod 902 is fixedly connected to the side of the baffle 910 facing the water storage tank 905. A piston 904 is fixedly installed at one end of the push-pull rod 902.

[0025] Please refer to Figure 5 and Figure 6 As shown, a drain pipe 901 is fixedly communicated with the bottom of the side of the above-mentioned water storage tank 905. The diameter of the piston 904 is the same as the inner diameter of the drain pipe 901, and the position of the piston 904 corresponds to the position of the drain pipe 901; by controlling the rotation of the rotary cylinder 301 to drive the L-shaped rod 302 to rotate forward, the groove formed on the side of the electric heating block 303 is attached to the outer wall of the feed hopper 1, and the electric heating block 303 is turned on to heat the feed hopper 1, so as to preheat the kaolin powder therein, facilitate the removal of the adsorbed moisture and impurities on its surface, and thus improve the activity of the intercalation reaction; during the process of several stirring paddles stirring the kaolin powder mixed with deionized water, the L-shaped rod 302 rotates reversely to provide a thrust to the roller 908, so that the push-pull rod 902 drives the piston 904 to extend into the water storage tank 905, facilitating the deionized water in the water storage tank 905 to flow along the drain pipe 901 into the disc 903. At this time, the stirring shaft 10 is in a rotating state, so that the clear water in the disc 903 is evenly splashed around due to the action of centrifugal force, facilitating the deionized water to flow down along the inner wall of the reaction kettle 7, not only effectively cleaning the kaolin powder, but also avoiding adding too much deionized water, reducing the concentration of the intercalating agent, and ensuring the intercalation effect.

[0026] Please refer to Figure 2 and Figure 5 As shown, a stirring shaft 10 is rotatably arranged inside the above-mentioned reaction kettle 7. The stirring shaft 10 is longitudinally arranged, and a disc 903 is fixedly installed in the upper middle part of the stirring shaft 10. The position of the disc 903 is below the output end of the drain pipe 901. A plurality of stirring paddles are fixedly installed in the lower middle part of the stirring shaft 10.

[0027] Please refer to Figure 2 As shown, a driving motor 12 is fixedly installed at the bottom of the above-mentioned heat preservation shell 5. A material discharging pipe 11 is arranged on one side of the driving motor 12. The input end of the material discharging pipe 11 is communicated with the reaction kettle 7, and a second control valve is fixedly installed in the middle of the material discharging pipe 11. The bottom end of the stirring shaft 10 movably penetrates through the reaction kettle 7 and is fixedly connected with the output end of the driving motor 12.

[0028] Please refer to Figure 2 As shown, a plurality of electric heating plates 14 are equidistantly embedded on the inner wall of the above-mentioned heat preservation shell 5, and the electric heating plates 14 are in contact with the reaction kettle 7.

[0029] Please refer to Figure 1 and Figure 2 As shown, a thermometer 6 for monitoring the internal temperature is fixedly inserted at the top of the side surface of the above-mentioned reaction kettle 7.

[0030] Please refer to Figure 1 As shown, a control panel 4 is fixedly arranged on the front surface of the above-mentioned heat preservation shell 5.

[0031] Working principle: When the present invention is in use, first, as Figure 2 and Figure 3 shown, after closing the first control valve 2, a sufficient amount of kaolin powder is put into the feed hopper 1, and then the rotary cylinder 301 is controlled to drive the L-shaped rod 302 to rotate forward, so that the groove formed on the side surface of the electric heating block 303 fits with the outer wall of the feed hopper 1, and the electric heating block 303 is turned on to heat the feed hopper 1, thereby preheating the kaolin powder therein, facilitating the removal of the adsorbed moisture and impurities on its surface, and thus improving the activity of the intercalation reaction; as Figure 2 and Figure 5 shown, while opening the first control valve 2, deionized water is injected into the reaction kettle 7 through the water inlet pipe 8. The deionized water will enter the water storage tank 905 through the opening 906. Due to the action of the tension spring, the piston 904 is located in the drain pipe 901, blocking the drain pipe 901, so that the water storage tank 905 is filled with deionized water, and the excess deionized water overflows from the opening 906 and contacts the kaolin powder entering the reaction kettle 7. The driving motor 12 is turned on, and a plurality of stirring paddles are driven to rotate through the stirring shaft 10, and the kaolin powder mixed with deionized water is stirred in cooperation with the intercalating agent. As Figures 2-4As shown, the rotation of the rotating cylinder 301 drives the L-shaped rod 302 to rotate in the reverse direction, so that the electric heating block 303 is immersed below the liquid level of the clear water in the water storage box 304, heating the clear water in the water storage box 304 to the set temperature. After the stirring is completed, several electric heating plates 14 are controlled to heat the reaction kettle 7. When the temperature exceeds the threshold, the electric heating plates 14 are promptly turned off, and then the water pump 305 is turned on, so that the warm water at the set temperature in the water storage box 304 enters the heat conduction pipe 13 along the water outlet pipe 306, and then flows back to the water storage box 304 through the water return pipe 307. The warm water flowing through the heat conduction pipe 13 not only quickly absorbs the excess heat in the reaction kettle 7, but also insulates the subsequent reaction kettle 7. This process quickly and accurately cools down to the optimal temperature for the intercalation reaction, avoiding affecting the efficiency of the intercalation reaction; as Figure 3 and Figure 5 shown, during the process of several stirring paddles stirring the kaolin powder in the mixed deionized water, the reverse rotation of the L-shaped rod 302 will provide a thrust to the roller 908, so that the push-pull rod 902 drives the piston 904 to extend into the water storage tank 905, facilitating the deionized water in the water storage tank 905 to flow along the drain pipe 901 into the disc 903. At this time, the stirring shaft 10 is in a rotating state, so that the clear water in the disc 903 is evenly splashed around due to the action of centrifugal force, facilitating the deionized water to flow down along the inner wall of the reaction kettle 7, not only effectively cleaning the kaolin powder, but also avoiding adding too much deionized water, reducing the intercalating agent concentration, and ensuring the intercalation effect.

[0032] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A mixing device for preparing modified kaolin, comprising a reaction kettle (7), and a heat preservation shell (5) is fixedly sleeved outside the reaction kettle (7), and is characterized in that: A temperature control mechanism (3) for insulating the reaction kettle (7) is provided on the side of the heat preservation shell (5). A feed hopper (1) is fixedly inserted at the top of the reaction kettle (7). A first control valve (2) is fixedly installed in the middle of the feed hopper (1). A cleaning mechanism (9) for cleaning kaolin powder on the inner wall of the reaction kettle (7) is arranged inside the reaction kettle (7). The temperature control mechanism (3) includes a water storage box (304) fixedly connected to the heat preservation shell (5). A water pump (305) is fixedly arranged on the front surface of the water storage box (304). The input end of the water pump (305) is communicated with the bottom of the water storage box (304), and the output end of the water pump (305) is communicated with a water outlet pipe (306).

2. The mixing device for preparing modified kaolin according to claim 1, characterized in that, A heat conduction pipe (13) is sleeved on the bottom of the outer wall of the reaction kettle (7). The heat conduction pipe (13) is fixedly connected to the inner wall of the heat preservation shell (5), and the input end of the heat conduction pipe (13) is communicated with the output end of the water outlet pipe (306). A water return pipe (307) is communicated with the top of the back surface of the water storage box (304). The input end of the water return pipe (307) is communicated with the output end of the heat conduction pipe (13).

3. A mixing device for preparing modified kaolin according to claim 1, characterized in that, A rotary cylinder (301) is fixedly installed on the top of the heat preservation shell (5). An L-shaped rod (302) is fixedly installed at the output end of the rotary cylinder (301). An electric heating block (303) is fixedly installed at one end of the L-shaped rod (302). The electric heating block (303) is located inside the water storage box (304), and a groove is formed on the side surface of the electric heating block (303). The size and position of the groove correspond to those of the feed hopper (1).

4. A mixing device for preparing modified kaolin according to claim 1, characterized in that, The cleaning mechanism (9) includes a guide frame (909) fixedly connected to the inner wall of the reaction kettle (7). A square rod (907) is movably inserted on the guide frame (909). One end of the square rod (907) movably penetrates through the reaction kettle (7) and a roller (908) is rotatably arranged. The roller (908) is in rolling connection with the middle part of the L-shaped rod (302).

5. A mixing device for preparing modified kaolin according to claim 4, characterized in that, A water storage tank (905) is fixedly installed at the top of the inner wall of the reaction kettle (7). An opening (906) is formed at the top of the water storage tank (905). A water inlet pipe (8) is communicated with the top of the reaction kettle (7). The position of the output end of the water inlet pipe (8) corresponds to the position of the opening (906).

6. The mixing device for preparing modified kaolin according to claim 4, wherein, A baffle (910) is fixedly installed at the end of the square rod (907) away from the roller (908). A tension spring is fixedly connected between the baffle (910) and the guide frame (909). A push-pull rod (902) is fixedly connected to the side surface of the baffle (910) facing the water storage tank (905). A piston (904) is fixedly installed at one end of the push-pull rod (902).

7. The mixing device for preparing modified kaolin according to claim 6, characterized in that, A drain pipe (901) is fixedly communicated with the bottom of the side surface of the water storage tank (905). The diameter of the piston (904) is the same as the inner diameter of the drain pipe (901), and the position of the piston (904) corresponds to the position of the drain pipe (901).

8. A mixing device for preparing modified kaolin according to claim 1, characterized in that, A stirring shaft (10) is rotatably arranged inside the reactor (7). A disc (903) is fixedly installed in the upper middle part of the stirring shaft (10). The position of the disc (903) is below the output end of the drain pipe (901). A plurality of stirring paddles are fixedly installed in the lower middle part of the stirring shaft (10).

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