Reduction type polycarboxylate superplasticizer reaction kettle

Abstract

The utility model belongs to the technical field of reaction kettles, and particularly relates to a reduction type polycarboxylate superplasticizer reaction kettle, which comprises a kettle body, a reaction kettle body, a reaction kettle cover, a reaction kettle cover and a reaction kettle cover, and is characterized in that the upper end and the lower end of the kettle body are provided with a discharge port and a feed port; supporting plates are welded to the two sides of the upper surface of the bottom plate in parallel, supporting columns are connected to the two sides of the supporting plates, and the other ends of the supporting columns are connected with the outer wall of the kettle body; the heat exchange assembly is used for controlling the temperature of the materials in the kettle body; the stirring device is used for stirring raw materials in the emulsifying kettle, the heat exchange assembly is installed on the outer wall of the kettle body, the stirring device is installed in the kettle body, and after the kettle body is heated, the reaction kettle body is rapidly cooled in time, so that the production efficiency of the reduction type polycarboxylate superplasticizer is improved; therefore, the practical performance of the reaction kettle is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reaction kettles, in particular to a shrinkage-reducing polycarboxylic acid water-reducing agent reaction kettle. Background Art

[0002] At present, the following methods are usually used to reduce the shrinkage cracking of cement-based materials: first, optimizing the raw materials and mix ratio; second, strengthening the maintenance of cement-based materials; and third, reducing the shrinkage cracking of cement-based materials by adding admixtures or fiber reinforcement. Among them, directly adding concrete shrinkage reducers will have an adverse effect on the strength of concrete, and will also increase the cost of concrete, which is not conducive to the construction of large-volume concrete. Therefore, it is necessary to study water reducers with shrinkage reduction functions. Polycarboxylate water reducers have become the first choice of shrinkage-reducing water reducers due to their unique advantages of molecular structure and designable performance.

[0003] The existing Chinese utility model patent with publication number CN218962636U includes a heat preservation barrel, a reaction barrel and a stirring rod, a heating tube is spirally sleeved between the heat preservation barrel and the reaction barrel, the heat preservation barrel is filled with water, the heating tube is immersed in the water, two stirring blades are evenly fixed on the circumference of the stirring rod, and the circumference of the stirring blade is wrapped with a heating wire. The application has the effect of improving the production efficiency of polycarboxylate water reducer.

[0004] In the above technical solution, the heat source of the reactor is the electric heating wire and the heating tube. However, after the reactor body is heated, the reactor body cannot be cooled down quickly in time, which will affect the production efficiency of the subsequent shrinkage-reducing polycarboxylic acid water-reducing agent, thereby greatly reducing the practical performance of the reactor. Utility Model Content

[0005] The purpose of the utility model is to provide a shrinkage-reducing polycarboxylate water-reducing agent reactor in view of the above-mentioned technical problems, so that after the reactor body is heated, the reactor body can be quickly cooled down in time to improve the production efficiency of the shrinkage-reducing polycarboxylate water-reducing agent, thereby greatly improving the practical performance of the reactor.

[0006] In view of this, the utility model provides a shrinkage-reducing polycarboxylic acid water-reducing agent reactor, characterized in that it comprises:

[0007] A kettle body, wherein the upper and lower ends of the kettle body are provided with a discharge port and a feed port;

[0008] A bottom plate, support plates are welded in parallel on both sides of the upper surface of the bottom plate, support columns are connected to both sides of the support plate, and the other end of the support column is connected to the outer wall of the kettle body;

[0009] A heat exchange component, wherein the heat exchange component is used to control the temperature of the material in the kettle;

[0010] A stirring device, the stirring device is used to stir the raw materials in the emulsification kettle,

[0011] The heat exchange component is arranged on the outer wall of the kettle body, and the stirring device is arranged inside the kettle body.

[0012] In the technical scheme, when the raw materials are poured into the reactor, the stirring device is started to stir the raw materials, and then the reactor is heated by the heat exchange component to promote the completion of the reaction. After the reaction is completed, the reactor is quickly cooled down with the cooperation of the heat exchange component, thereby improving the production efficiency of the shrinkage-reducing polycarboxylic acid water-reducing agent, thereby greatly improving the practical performance of the reactor.

[0013] In the above technical solution, further, the heat exchange component includes:

[0014] A jacket, wherein a cavity is provided inside the jacket, and an air inlet and an air outlet are also provided on the jacket, and the air inlet and the air outlet are communicated with the cavity;

[0015] A thermometer, which is used to measure the temperature of the material in the kettle;

[0016] Wherein, the jacket is sleeved on the outer wall of the kettle body, and the thermometer is arranged on the upper end of the kettle body and extends into the kettle body.

[0017] In the present technical scheme, when the raw materials are poured into the reactor, the stirring device is started to stir the raw materials, and the heat medium is input into the cavity of the jacket through the air inlet pipe, so that the material in the reactor body is heated through the outer wall. After the reaction is completed, the heat medium is discharged through the air outlet pipe. After the reaction is completed, the finished product is discharged from the discharge port, and then the refrigerant is input into the cavity of the jacket through the air inlet pipe, so that the material in the reactor body is cooled through the outer wall. During the reaction, the input of the refrigerant / heat medium is controlled in real time by observing the thermometer on the reactor body to control the temperature environment of the material reaction.

[0018] In the above technical solution, further, the stirring device comprises:

[0019] A stirring motor, wherein the stirring motor drives a stirring device;

[0020] A stirring shaft, the lower end of which is connected to the output shaft of the stirring motor;

[0021] A stirring rod is bolted to the stirring shaft through bolts.

[0022] In the technical solution, the stirring shaft is driven to rotate by the stirring motor, thereby driving the stirring rod to rotate circumferentially to stir the raw materials in the kettle.

[0023] In the above technical solution, further, an air outlet channel is provided at the upper end of the kettle body, the air outlet channel is connected to the interior of the kettle body, and the air outlet channel is blocked by a screw plug.

[0024] In the present technical solution, after the kettle body is heated, while the refrigerant is input into the jacket, the stirring motor is started to rotate the stirring rod. By increasing the speed of the stirring motor, the stirring rod is used as a fan blade to speed up the air circulation speed in the kettle body, so that the hot air can flow out quickly from the air outlet channel, thereby achieving the effect of auxiliary cooling.

[0025] In the above technical solution, further, the stirring rod is provided with an embedding groove, and the heating wire is embedded in the embedding groove.

[0026] In the present technical solution, when the raw materials enter the kettle, the jacket is introduced with heat medium and the heating function of the heating wire is turned on. Under the heating of the heating wire, the temperature inside the kettle rises, thereby improving the heating efficiency of the kettle and the production efficiency of the polycarboxylic acid water reducer.

[0027] In the above technical solution, further, the reactor is also provided with a defoaming device, and the defoaming device is used to eliminate bubbles generated by the synthesis of the shrinkage-reducing polycarboxylic acid water-reducing agent.

[0028] In the above technical solution, further, the defoaming device includes:

[0029] A container, wherein the container is used to store the defoaming agent;

[0030] A centrifugal pump, wherein the upper end of the centrifugal pump is connected to the outlet end of the container;

[0031] The upper end of the pipeline is connected to the centrifugal pump, the lower end of the pipeline leads to the interior of the kettle body and the end of the pipeline is connected to the nozzle.

[0032] In the present technical scheme, a large amount of air is often mixed into the polycarboxylate water-reducing agent during the production process to generate a large number of bubbles. If not removed in time, it may cause a boiling pot, and the bubbles generated will seriously affect the performance of the product. Then, the defoaming agent inside the container is extracted by a centrifugal pump and sprayed onto the surface of the polycarboxylate water-reducing agent through a nozzle, thereby reducing the surface tension of the liquid.

[0033] In the above technical solution, further, a filter plate is installed inside the kettle body, and the filter plate is located at the upper end of the discharge port.

[0034] In the present technical solution, the setting of the filter plate can effectively remove unreacted solid impurities in the liquid.

[0035] The beneficial effects of the utility model are:

[0036] 1. When the raw materials are poured into the reactor, the stirring device is started to stir the raw materials, and the heat medium is input into the cavity of the jacket through the air inlet pipe, so that the material in the reactor body is heated through the outer wall. After the reaction is completed, the heat medium is discharged through the air outlet pipe. After the reaction is completed, the finished product is discharged from the discharge port, and then the refrigerant is input into the cavity of the jacket through the air inlet pipe, so that the material in the reactor body is cooled through the outer wall. During the reaction, the input of the refrigerant / heat medium is controlled in real time by observing the thermometer on the reactor body to control the temperature environment of the material reaction.

[0037] 2. During the production process of polycarboxylic acid water reducer, a large amount of air is often mixed in to produce a large number of bubbles. If it is not removed in time, it may cause boiling of the kettle, and the bubbles produced will seriously affect the performance of the product. Then, the defoaming agent inside the container is extracted by a centrifugal pump and sprayed onto the surface of the polycarboxylic acid water reducer through a nozzle, thereby reducing the surface tension of the liquid.

[0038] 3. After the kettle body is heated, while the refrigerant is input into the jacket, the stirring motor is started to rotate the stirring rod. By increasing the speed of the stirring motor, the stirring rod acts as a fan blade, speeding up the air circulation speed in the kettle body and making the hot air flow out quickly from the air outlet channel, thereby achieving the effect of auxiliary cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the shrinkage-reducing polycarboxylic acid water-reducing agent reaction kettle of the utility model;

[0040] Figure 2 It is a cross-sectional view of the reaction kettle of the reduced-type polycarboxylate water-reducing agent of the utility model;

[0041] Figure 3 It is a structural schematic diagram of the stirring device of the utility model;

[0042] The symbols in the figure are:

[0043] 1. Kettle body; 2. Feed inlet; 3. Discharge outlet; 4. Bottom plate; 5. Support plate; 6. Support column; 7. Air inlet; 8. Air outlet; 9. Defoaming device; 10. Thermometer; 11. Stirring device; 12. Jacket; 13. Cavity; 14. Stirring motor; 15. Stirring shaft; 16. Stirring rod; 17. Embedded groove; 18. Heating wire; 19. Container; 20. Centrifugal pump; 21. Pipeline; 22. Nozzle; 23. Screw plug; 24. Air outlet pipe; 25. Filter plate. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0045] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0047] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words 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, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0048] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0049] Embodiment 1:

[0050] The present embodiment provides a shrinkage-type polycarboxylate water-reducing agent reaction kettle, comprising: a kettle body 1, wherein the upper and lower ends of the kettle body 1 are provided with a discharge port 3 and a feed port 2; a bottom plate 4, wherein support plates 5 are welded in parallel on both sides of the upper surface of the bottom plate 4, and support columns 6 are connected to both sides of the support plate 5, and the other end of the support column 6 is connected to the outer wall of the kettle body 1;

[0051] A heat exchange component, which is used to control the temperature of the material in the kettle body 1; a stirring device 11, which is used to stir the raw materials in the emulsification kettle, wherein the heat exchange component is arranged on the outer wall of the kettle body 1, and the stirring device 11 is arranged inside the kettle body 1.

[0052] In this embodiment, when the raw materials are poured into the reactor, the stirring device 11 is started to stir the raw materials, and then the reactor is heated by the heat exchange component to promote the completion of the reaction. After the reaction is completed, the reactor is quickly cooled down with the cooperation of the heat exchange component, thereby improving the production efficiency of the shrinkage-reducing polycarboxylic acid water-reducing agent, thereby greatly improving the practical performance of the reactor.

[0053] In the above technical solution, further, the reactor is also provided with a defoaming device 9, and the defoaming device 9 is used to eliminate bubbles generated by the synthesis of the shrinkage-reducing polycarboxylic acid water-reducing agent.

[0054] In the above technical solution, further, the defoaming device 9 includes:

[0055] A container 19, wherein the container 19 is used to store a defoaming agent;

[0056] A centrifugal pump 20, wherein the upper end of the centrifugal pump 20 is connected to the outlet end of the container 19;

[0057] The pipeline 21 has an upper end connected to the centrifugal pump 20 , a lower end leading to the interior of the kettle body 1 and an end connected to the nozzle 22 .

[0058] In the present technical solution, a large amount of air is often mixed into the polycarboxylate water-reducing agent during the production process to generate a large number of bubbles. If not removed in time, it may cause a boiling pot, and the bubbles generated will seriously affect the performance of the product. Then, the defoaming agent in the container 19 is extracted by a centrifugal pump 20 and sprayed onto the surface of the polycarboxylate water-reducing agent through a nozzle 22, thereby reducing the surface tension of the liquid.

[0059] In the above technical solution, further, a filter plate 25 is installed inside the kettle body 1 and is located at the upper end of the discharge port 3 .

[0060] In the present technical solution, the filter plate 25 can be provided to effectively remove unreacted solid impurities in the liquid.

[0061] Embodiment 2:

[0062] The present embodiment provides a shrinkage-type polycarboxylate water-reducing agent reaction kettle, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the heat exchange component comprises: a jacket 12, a cavity 13 is provided inside the jacket 12, and an air inlet 7 and an air outlet 8 are also provided on the jacket 12, and the air inlet 7 and the air outlet 8 are connected to the cavity 13; a thermometer 10, and the thermometer 10 is used to measure the temperature of the material in the kettle body 1; wherein the jacket 12 is sleeved on the outer wall of the kettle body 1, and the thermometer 10 is arranged at the upper end of the kettle body 1 and extends into the kettle body 1.

[0063] In this embodiment, when the raw materials are poured into the reactor, the stirring device 11 is started to stir the raw materials, and the heat medium is input into the cavity 13 of the jacket 12 through the air inlet pipe, so that the material in the reactor body 1 is heated through the outer wall. After the reaction is completed, the heat medium is discharged through the air outlet pipe. After the reaction is completed, the finished product is discharged from the discharge port 3, and then the refrigerant is input into the cavity 13 of the jacket 12 through the air inlet pipe, so that the material in the reactor body 1 is cooled through the outer wall. During the reaction, the input of the refrigerant / heat medium is controlled in real time by observing the thermometer 10 on the reactor body 1 to control the temperature environment of the material reaction.

[0064] Refrigerant: Refrigerant is a substance that easily absorbs heat to become a gas and easily releases heat to become a liquid. In the early days, refrigeration plants used ammonia as a refrigerant. When ammonia is pressurized, it releases heat to become a liquid; when the high-pressure liquid is decompressed to become a gas, it absorbs heat.

[0065] Heat medium: Heat medium refers to the medium material that transfers heat. For example, hot water, steam, and air are commonly used now. Therefore, it can be divided into hot water heating system, steam heating system, and hot air heating system.

[0066] Embodiment 3:

[0067] The present embodiment provides a shrinkage-type polycarboxylate water-reducing agent reactor, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the stirring device 11 comprises: a stirring motor 14, which is driven and connected to the stirring device 11; a stirring shaft 15, the lower end of which is connected to the output shaft of the stirring motor 14; a stirring rod 16, which is bolted to the stirring shaft 15 by bolts, and an embedding groove 17 is provided on the stirring rod 16, in which a heating wire is embedded.

[0068] In the present technical solution, the stirring shaft 15 is driven to rotate by the stirring motor 14, and then the stirring rod 16 is driven to rotate circumferentially to stir the raw materials in the kettle body 1. When the raw materials enter the kettle body 1, the jacket 12 is introduced with heat medium, and the heating function of the heating wire is turned on. Under the heating of the heating wire, the temperature inside the kettle body 1 rises, thereby improving the heating efficiency of the kettle body 1 and improving the production efficiency of the polycarboxylic acid water reducer.

[0069] In the above technical solution, further, a gas outlet channel is provided at the upper end of the kettle body 1 , and the gas outlet channel is connected to the interior of the kettle body 1 , and the gas outlet channel is blocked by a screw plug 23 .

[0070] In the present technical solution, after the kettle body 1 is heated, while the refrigerant is input into the jacket 12, the stirring motor 14 is started to rotate the stirring rod 16. By increasing the rotation speed of the stirring motor 14, the stirring rod 16 acts as a fan blade, thereby accelerating the air circulation speed in the inner kettle body 1 and allowing the hot air to flow out quickly from the air outlet channel, thereby achieving the effect of auxiliary cooling.

[0071] Embodiment 4:

[0072] The present embodiment provides a shrinkage-reducing polycarboxylate water-reducing agent reactor. In addition to the technical solutions of the above embodiments, the reactor also has the following technical features: the reactor is further provided with a defoaming device 9, which is used to eliminate bubbles generated by the synthesis of the shrinkage-reducing polycarboxylate water-reducing agent. The defoaming device 9 includes: a container 19, which is used to store the defoaming agent; a centrifugal pump 20, the upper end of which is connected to the outlet end of the container 19; and a pipeline 21, the upper end of which is connected to the centrifugal pump 20, and the lower end of which passes into the interior of the kettle body 1 and the end of which is connected to the nozzle 22.

[0073] In the present technical solution, a large amount of air is often mixed into the polycarboxylate water-reducing agent during the production process to generate a large number of bubbles. If not removed in time, it may cause a boiling pot, and the bubbles generated will seriously affect the performance of the product. Then, the defoaming agent in the container 19 is extracted by a centrifugal pump 20 and sprayed onto the surface of the polycarboxylate water-reducing agent through a nozzle 22, thereby reducing the surface tension of the liquid.

[0074] In the above technical solution, further, a filter plate 25 is installed inside the kettle body 1 , and the filter plate 25 is located at the upper end of the discharge port 3 .

[0075] In the present technical solution, the filter plate 25 can be provided to effectively remove unreacted solid impurities in the liquid.

[0076] The working process of the utility model is as follows: the raw material of the shrinkable polycarboxylate water-reducing agent is poured into the kettle body 1 of the reaction kettle, the heat medium is introduced into the air inlet 7 of the jacket 12, the outer wall of the kettle body 1 is heated, and at the same time, the heating wire on the stirring rod 16 is started to heat the inside of the kettle body 1, the heating efficiency of the kettle body 1 is improved, and the production efficiency of the polycarboxylate water-reducing agent is improved. After the reaction is completed, the finished product is discharged from the discharge port 3, the heating function of the heating wire is turned off, and the jacket 12 is introduced with the refrigerant while the air outlet channel is opened. By accelerating the rotation speed of the stirring motor 14, the stirring rod 16 is used as a fan blade, the air circulation speed in the inner kettle body 1 is accelerated, and the hot air is quickly discharged from the air outlet channel, thereby achieving the effect of auxiliary cooling.

[0077] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A shrinkage-reducing polycarboxylate water-reducing agent reactor, characterized in that ,include: A kettle body (1), wherein the upper and lower ends of the kettle body (1) are provided with a discharge port (3) and a feed port (2); A bottom plate (4), support plates (5) are welded in parallel on both sides of the upper surface of the bottom plate (4), support columns (6) are connected to both sides of the support plate (5), and the other end of the support column (6) is connected to the outer wall of the kettle body (1); A heat exchange component, the heat exchange component is used to control the temperature of the material in the kettle (1); A stirring device (11), wherein the stirring device (11) is used to stir the raw materials in the emulsification kettle, The heat exchange component is arranged on the outer wall of the kettle body (1), and the stirring device (11) is arranged inside the kettle body (1).

2. According to the shrinkage-reducing polycarboxylate water-reducing agent reactor of claim 1, the heat exchange component comprises: A jacket (12), wherein a cavity (13) is provided inside the jacket (12), and an air inlet (7) and an air outlet (8) are also provided on the jacket (12), wherein the air inlet (7) and the air outlet (8) are in communication with the cavity (13); A thermometer (10), wherein the thermometer (10) is used to measure the temperature of the material in the kettle (1); The jacket (12) is sleeved on the outer wall of the kettle body (1), and the thermometer (10) is arranged at the upper end of the kettle body (1) and extends into the kettle body (1).

3. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 1, characterized in that: The stirring device (11) comprises: A stirring motor (14), wherein the stirring motor (14) is drivingly connected to the stirring device (11); A stirring shaft (15), the lower end of which is connected to the output shaft of the stirring motor (14); A stirring rod (16), wherein the stirring rod (16) is bolted to the stirring shaft (15) via bolts.

4. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 3, characterized in that: The upper end of the kettle body (1) is also provided with an air outlet passage, the air outlet passage is connected to the interior of the kettle body (1), and the air outlet passage is blocked by a screw plug (23).

5. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 4, characterized in that: The stirring rod (16) is provided with an embedding groove (17), and a heating wire is embedded in the embedding groove (17).

6. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 1, characterized in that: The reaction kettle is also provided with a defoaming device (9), and the defoaming device (9) is used to eliminate bubbles generated during the synthesis of the shrinkage-reducing polycarboxylic acid water-reducing agent.

7. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 6, characterized in that: The defoaming device (9) comprises: A container (19), wherein the container (19) is used to store a defoaming agent; a centrifugal pump (20), wherein the upper end of the centrifugal pump (20) is connected to the outlet end of the container (19); A pipeline (21), wherein the upper end of the pipeline (21) is connected to the centrifugal pump (20), the lower end of the pipeline (21) is passed into the interior of the kettle body (1) and the end of the pipeline (21) is connected to the nozzle (22).

8. A shrinkage-reducing polycarboxylate water-reducing agent reaction kettle according to claim 1, characterized in that: A filter plate (25) is installed inside the kettle body (1), and the filter plate (25) is located at the upper end of the discharge port (3).

Images