阅读说明：本技术 一种高效水泥混凝土减水剂及其制备方法 (High-efficiency cement concrete water reducing agent and preparation method thereof ) 是由 不公告发明人 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种高效水泥混凝土减水剂及其制备方法,包括以下重量份原料甲基烯丙基聚氧乙烯醚30-38份、巯基乙酸8-10份、甲基丙烯酸二甲氨基乙酯28-35份、二氯甲烷5-8份、氯化苄12-16份、乙醚12-16份、阻聚剂1-3份、引发剂a2-5份、引发剂b3-6份、去离子水15-26份。该高效水泥混凝土减水剂,通过采用甲基丙烯酸二甲氨基乙酯、二氯甲烷和阻聚剂制备单体产物,复配甲基烯丙基聚氧乙烯醚,对粘土起到一定抵抗作用,进而有效的降低水泥浆体的流动度,提高减水剂的适用范围；整个制备流程保证物料的密封性,避免外界污染的发生,进而有效提高水泥混凝土减水剂的制备质量。(The invention discloses a high-efficiency cement concrete water reducer and a preparation method thereof, wherein the water reducer comprises the following raw materials, by weight, 30-38 parts of methyl allyl polyoxyethylene ether, 8-10 parts of thioglycollic acid, 28-35 parts of dimethylaminoethyl methacrylate, 5-8 parts of dichloromethane, 12-16 parts of benzyl chloride, 12-16 parts of diethyl ether, 1-3 parts of a polymerization inhibitor, 2-5 parts of an initiator a, 3-6 parts of an initiator b, and 15-26 parts of deionized water. According to the high-efficiency cement concrete water reducer, a monomer product is prepared from dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor, and methyl allyl polyoxyethylene ether is compounded to play a certain resistance role on clay, so that the fluidity of cement paste is effectively reduced, and the application range of the water reducer is improved; the whole preparation process ensures the sealing property of the materials, avoids the occurrence of external pollution and further effectively improves the preparation quality of the cement concrete water reducing agent.)

1. The high-efficiency cement concrete water reducing agent is characterized in that: the feed comprises the following raw materials in parts by weight: 30-38 parts of methyl allyl polyoxyethylene ether, 8-10 parts of thioglycollic acid, 28-35 parts of dimethylaminoethyl methacrylate, 5-8 parts of dichloromethane, 12-16 parts of benzyl chloride, 12-16 parts of diethyl ether, 1-3 parts of a polymerization inhibitor, 2-5 parts of an initiator a, 3-6 parts of an initiator b and 15-26 parts of deionized water;

the cement concrete water reducing agent is prepared by the following steps:

firstly, putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment together, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a reaction kettle I (2) through a feeding pipe (25) at the top of the reaction kettle I (2), introducing circulating water of 40 ℃ into a spiral heat exchange pipe (9) on the surface of the reaction kettle I (2) through a water inlet pipe (10), continuously adding benzyl chloride into the reaction kettle I (2) through the feeding pipe (25), starting a driving motor (5) working switch at the top of the reaction kettle I (2), driving a reaction frame (6) inside the reaction kettle I (2) to rotate through an output shaft of the driving motor (5), stirring and mixing raw materials inside the reaction kettle I (2), after stirring reaction for 5 hours, introducing cooling water into the spiral heat exchange pipe (9) through the water inlet pipe (10), cooling the raw materials in the first reaction kettle (2) to room temperature;

step two, introducing circulating water of 40 ℃ into the spiral heat exchange tube (9) on the surface of the first reaction kettle (2) through the water inlet tube (10), adding diethyl ether into the first reaction kettle (2) through the feed tube (25), continuously driving the reaction frame (6) to rotate in the first reaction kettle (2) through the output shaft of the driving motor (5), and reacting for 3 hours to obtain a monomer product;

starting a working switch of a material pump (21) on the left side of the top of the vacuum drying box (4), extracting the monomer product in the reaction kettle I (2) by utilizing the material pump (21) in cooperation with a pumping pipe (22), filtering the monomer product by a filter screen (14) in a filter frame (13) before the monomer product enters the pumping pipe (22), pumping the monomer product into a material box (19), introducing steam of 40 ℃ into a steam pipe (20), and drying the monomer product in the material box (19);

step four, feeding methyl allyl polyoxyethylene ether and deionized water into the reaction kettle II (3) through a feeding pipe (25) at the top of the reaction kettle II (3), starting a working switch of a driving motor (5) at the top of the reaction kettle II (3), rotating a reaction frame (6) in the reaction kettle II (3) to completely dissolve the methyl allyl polyoxyethylene ether, then adding mercaptoacetic acid and an initiator a into the reaction kettle II (3) through a feeding pipe (25), reacting for 10min, starting a material pump (21) working switch on the right side of the top of the vacuum drying box (4), pumping the monomer product in the material box (19) into the reaction kettle II (3), adding an initiator b into the reaction kettle II (3) through a feeding pipe (25), introducing 50 ℃ circulating water into the spiral heat exchange pipe (9) on the surface of the reaction kettle II (3), and stirring at constant temperature for reaction for 2 hours;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the reaction kettle II (3) through a feeding pipe (25), adjusting the pH value of a reaction liquid in the reaction kettle II (3) to 7, and sending the reaction liquid in the reaction kettle II (3) out through a discharging pipe (24) to obtain the cement concrete water reducer.

2. The high efficiency cement concrete water reducing agent according to claim 1, characterized in that: the polymerization inhibitor is p-tert-butyl catechol, the initiator a is hydrogen peroxide, and the initiator b is ascorbic acid.

3. The high efficiency cement concrete water reducing agent according to claim 1, characterized in that: the integrated production equipment comprises a base (1), a first reaction kettle (2), a second reaction kettle (3) and a vacuum drying box (4), two sides of the top of the base (1) are respectively and fixedly connected with a first reaction kettle (2) and a second reaction kettle (3), and the top of the base (1) is arranged between the first reaction kettle (2) and the second reaction kettle (3) and is provided with a vacuum drying box (4), the tops of the first reaction kettle (2) and the second reaction kettle (3) are both provided with a driving motor (5), reaction frames (6) are arranged inside the first reaction kettle (2) and the second reaction kettle (3), one end of the output shafts of the two driving motors (5) respectively penetrates through the first reaction kettle (2) and the second reaction kettle (3) and extends to the insides of the first reaction kettle (2) and the second reaction kettle (3), and one end of the output shafts of the two driving motors (5) is fixedly connected with the top ends of the two reaction frames (6) through a coupler respectively.

4. The high efficiency cement concrete water reducing agent according to claim 3, characterized in that: the surface of reation kettle (2) and reation kettle two (3) all is provided with heating element (7), heating element (7) are including insulation cover (8), spiral heat exchange tube (9), inlet tube (10) and outlet pipe (11), the surface of reation kettle (2) and reation kettle two (3) all is provided with insulation cover (8), and the inner wall of two insulation covers (8) all is provided with spiral heat exchange tube (9), the top intercommunication of spiral heat exchange tube (9) has inlet tube (10), and the bottom intercommunication of spiral heat exchange tube (9) has outlet pipe (11), two the internal surface of spiral heat exchange tube (9) respectively with the surface contact of reation kettle one (2) and reation kettle two (3).

5. The high efficiency cement concrete water reducing agent according to claim 3, characterized in that: a filtering component (12) is arranged below the inner part of the first reaction kettle (2), the filtering component (12) comprises a filtering frame (13), a filtering screen (14), a linear motor (15), a cleaning roller (16), a rotating block (17) and a transmission groove (18), a filter frame (13) is fixedly connected below the front surface of the first reaction kettle (2) through a screw, a filter screen (14) is arranged in the filter frame (13), a linear motor (15) is arranged above the interior of the filter frame (13), a rotating block (17) is arranged at the bottom of the linear motor (15), a cleaning roller (16) is rotatably connected at the bottom of the rotating block (17), a transmission groove (18) is arranged below the inside of the filter frame (13), and the bottom end of the cleaning roller (16) is rotatably connected with the inside of the transmission groove (18), and the surface of the cleaning roller (16) is contacted with one side of the filter screen (14).

6. The high efficiency cement concrete water reducing agent according to claim 3, characterized in that: the inside of vacuum drying oven (4) is provided with workbin (19) and steam pipe (20), the both sides at vacuum drying oven (4) top all are provided with material pump (21), two the feed end of material pump (21) all communicates there is material pumping pipe (22), and the discharge end of two material pumps (21) all communicates there is row material pipe (23), is located the left side the inside intercommunication of one end and reation kettle (2) of material pumping pipe (22), is located the right side the one end and the inside below intercommunication of workbin (19) of material pumping pipe (22), be located the left side arrange the inside intercommunication of the one end and workbin (19) of material pipe (23), be located the right side the one end of material pumping pipe (23) and the inside intercommunication of reation kettle two (3).

7. The high efficiency cement concrete water reducing agent according to claim 3, characterized in that: the inside below of reation kettle (2) and reation kettle two (3) all is provided with discharging pipe (24), and the inside of two discharging pipes (24) communicates with the inside of reation kettle (2) and reation kettle two (3) respectively, the top of reation kettle (2) and reation kettle two (3) all is provided with a plurality of inlet pipe (25), and the inside of a plurality of inlet pipe (25) communicates with the inside of reation kettle (2) and reation kettle two (3) respectively.

8. A preparation method of a high-efficiency cement concrete water reducing agent is characterized by comprising the following steps: the method comprises the following steps:

firstly, putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment together, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a reaction kettle I (2) through a feeding pipe (25) at the top of the reaction kettle I (2), introducing circulating water of 40 ℃ into a spiral heat exchange pipe (9) on the surface of the reaction kettle I (2) through a water inlet pipe (10), continuously adding benzyl chloride into the reaction kettle I (2) through the feeding pipe (25), starting a driving motor (5) working switch at the top of the reaction kettle I (2), driving a reaction frame (6) inside the reaction kettle I (2) to rotate through an output shaft of the driving motor (5), stirring and mixing raw materials inside the reaction kettle I (2), after stirring reaction for 5 hours, introducing cooling water into the spiral heat exchange pipe (9) through the water inlet pipe (10), cooling the raw materials in the first reaction kettle (2) to room temperature;

step two, introducing circulating water of 40 ℃ into the spiral heat exchange tube (9) on the surface of the first reaction kettle (2) through the water inlet tube (10), adding diethyl ether into the first reaction kettle (2) through the feed tube (25), continuously driving the reaction frame (6) to rotate in the first reaction kettle (2) through the output shaft of the driving motor (5), and reacting for 3 hours to obtain a monomer product;

starting a working switch of a material pump (21) on the left side of the top of the vacuum drying box (4), extracting the monomer product in the reaction kettle I (2) by utilizing the material pump (21) in cooperation with a pumping pipe (22), filtering the monomer product by a filter screen (14) in a filter frame (13) before the monomer product enters the pumping pipe (22), pumping the monomer product into a material box (19), introducing steam of 40 ℃ into a steam pipe (20), and drying the monomer product in the material box (19);

step four, feeding methyl allyl polyoxyethylene ether and deionized water into the reaction kettle II (3) through a feeding pipe (25) at the top of the reaction kettle II (3), starting a working switch of a driving motor (5) at the top of the reaction kettle II (3), rotating a reaction frame (6) in the reaction kettle II (3) to completely dissolve the methyl allyl polyoxyethylene ether, then adding mercaptoacetic acid and an initiator a into the reaction kettle II (3) through a feeding pipe (25), reacting for 10min, starting a material pump (21) working switch on the right side of the top of the vacuum drying box (4), pumping the monomer product in the material box (19) into the reaction kettle II (3), adding an initiator b into the reaction kettle II (3) through a feeding pipe (25), introducing 50 ℃ circulating water into the spiral heat exchange pipe (9) on the surface of the reaction kettle II (3), and stirring at constant temperature for reaction for 2 hours;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the reaction kettle II (3) through a feeding pipe (25), adjusting the pH value of a reaction liquid in the reaction kettle II (3) to 7, and sending the reaction liquid in the reaction kettle II (3) out through a discharging pipe (24) to obtain the cement concrete water reducer.

Technical Field

The invention relates to the technical field of water reducing agents, in particular to a high-efficiency cement concrete water reducing agent and a preparation method thereof.

Background

The water reducing agent is a concrete additive widely applied in China at present, and can reduce the water consumption for mixing and improve the strength of concrete under the condition of unchanged concrete workability and cement consumption; and the cement consumption can be saved under the condition of unchanged workability and strength.

The existing polycarboxylate water reducing agent has the advantages of low mixing amount, high water reducing rate, excellent dispersing performance, adjustable molecular structure, environmental friendliness and the like, and is widely applied to the field of concrete, but the polycarboxylate water reducing agent is extremely sensitive to clay, and clay components are always brought into concrete mixing materials, so that the polycarboxylate water reducing agent is one of important factors causing serious loss of fluidity of cement slurry, the application range of the polycarboxylate water reducing agent is directly restricted, and in order to solve the problem, technical personnel in the field provide a high-efficiency cement concrete water reducing agent and a preparation method of the high-efficiency cement concrete water reducing agent.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a high-efficiency cement concrete water reducing agent and a preparation method thereof, and solves the problems that a polycarboxylate water reducing agent is extremely sensitive to clay, and the clay components are always brought into a concrete mixing material, which is one of important factors causing serious loss of cement paste fluidity, and the application range of the polycarboxylate water reducing agent is directly restricted.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the efficient cement concrete water reducing agent comprises the following raw materials in parts by weight: 30-38 parts of methyl allyl polyoxyethylene ether, 8-10 parts of thioglycollic acid, 28-35 parts of dimethylaminoethyl methacrylate, 5-8 parts of dichloromethane, 12-16 parts of benzyl chloride, 12-16 parts of diethyl ether, 1-3 parts of a polymerization inhibitor, 2-5 parts of an initiator a, 3-6 parts of an initiator b and 15-26 parts of deionized water;

the cement concrete water reducing agent is prepared by the following steps:

putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a first reaction kettle through a feeding pipe at the top of the first reaction kettle, introducing circulating water of 40 ℃ into a spiral heat exchange pipe on the surface of the first reaction kettle through a water inlet pipe, continuously adding benzyl chloride into the first reaction kettle through the feeding pipe, starting a driving motor working switch at the top of the first reaction kettle, driving a reaction frame in the first reaction kettle to rotate through a driving motor output shaft, stirring and mixing raw materials in the first reaction kettle, after stirring and reacting for 5 hours, introducing cooling water into the spiral heat exchange pipe through the water inlet pipe, and cooling the raw materials in the first reaction kettle to room temperature;

step two, introducing circulating water of 40 ℃ into the spiral heat exchange tube on the surface of the first reaction kettle through a water inlet tube, adding diethyl ether into the first reaction kettle through a feed tube, continuously driving the reaction frame to rotate in the first reaction kettle through an output shaft of a driving motor, and reacting for 3 hours to obtain a monomer product;

starting a material pump working switch on the left side of the top of the vacuum drying box, extracting a monomer product in the reaction kettle I by using a material pump matched with a material pumping pipe, filtering the monomer product by using a filter screen in a filter frame before the monomer product enters the material pumping pipe, pumping the monomer product into a material box, introducing steam of 40 ℃ into the steam pipe, and drying the monomer product in the material box;

feeding methyl allyl polyoxyethylene ether and deionized water into the second reaction kettle through a feeding pipe at the top of the second reaction kettle, starting a driving motor working switch at the top of the second reaction kettle, rotating a reaction frame in the second reaction kettle to completely dissolve the methyl allyl polyoxyethylene ether, then feeding mercaptoacetic acid and an initiator a into the second reaction kettle through the feeding pipe, after reacting for 10min, starting a material pump working switch at the right side of the top of a vacuum drying box, pumping a monomer product in the material box into the second reaction kettle, feeding an initiator b into the second reaction kettle through the feeding pipe, introducing 50 ℃ circulating water into the spiral heat exchange pipe on the surface of the second reaction kettle, and carrying out constant-temperature stirring reaction for 2 h;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the second reaction kettle through a feeding pipe, adjusting the pH value of the reaction liquid in the second reaction kettle to be 7, and sending the reaction liquid in the second reaction kettle out through a discharging pipe to obtain the cement concrete water reducing agent.

Preferably, the polymerization inhibitor is p-tert-butyl catechol, the initiator a is hydrogen peroxide, and the initiator b is ascorbic acid.

Preferably, integrative production facility includes base, reation kettle one, reation kettle two and vacuum drying case, the both sides at base top are fixedly connected with reation kettle one and reation kettle two respectively, and the top of base is located and is provided with vacuum drying case between reation kettle one and the reation kettle two, reation kettle one and reation kettle two's top all is provided with driving motor, and reation kettle one and reation kettle two's inside all is provided with the reaction frame, two reation kettle one and reation kettle two are run through respectively to driving motor output shaft's one end and extend to reation kettle one and reation kettle two's inside, and the one end of two driving motor output shafts passes through shaft coupling fixed connection with the top of two reaction frames respectively.

Preferably, the surface of the first reaction kettle and the surface of the second reaction kettle are both provided with heating components, each heating component comprises a heat insulation sleeve, a spiral heat exchange tube, an inlet tube and an outlet tube, the surface of the first reaction kettle and the surface of the second reaction kettle are both provided with the heat insulation sleeves, the inner walls of the two heat insulation sleeves are both provided with the spiral heat exchange tubes, the top ends of the spiral heat exchange tubes are communicated with the inlet tubes, the bottom ends of the spiral heat exchange tubes are communicated with the outlet tubes, and the inner surfaces of the spiral heat exchange tubes are in contact with the surfaces of the first reaction kettle and the second reaction kettle respectively.

Preferably, a filtering component is arranged below the inner part of the reaction kettle, the filtering component comprises a filtering frame, a filtering screen, a linear motor, a cleaning roller, a rotating block and a transmission groove, the filtering frame is fixedly connected to the lower part of the front surface of the reaction kettle through screws, the filtering frame is arranged inside the filtering frame, the linear motor is arranged above the inner part of the filtering frame, the rotating block is arranged at the bottom of the linear motor, the cleaning roller is connected to the bottom of the rotating block in a rotating mode, the transmission groove is formed in the lower part of the inner part of the filtering frame, the bottom of the cleaning roller is connected with the transmission groove in a rotating mode, and the surface of the cleaning roller is in contact with one side of the filtering screen.

Preferably, the inside of vacuum drying oven is provided with workbin and steam pipe, the both sides at vacuum drying oven top all are provided with the material pump, two the feed end of material pump all communicates there is the pumping pipe, and the discharge end of two material pumps all communicates there is row material pipe, is located the left side the one end of pumping pipe and reation kettle one's inside intercommunication are located the right side the one end of pumping pipe and the inside below intercommunication of workbin are located the left side arrange the one end of material pipe and the inside intercommunication of workbin, are located the right side arrange the one end of material pipe and reation kettle two's inside intercommunication.

Preferably, the inside below of reation kettle one and reation kettle two all is provided with the discharging pipe, and the inside of two discharging pipes communicate with reation kettle one and reation kettle two's inside respectively, reation kettle one and reation kettle two's top all is provided with a plurality of inlet pipe, and the inside of a plurality of inlet pipe communicates with reation kettle one and reation kettle two's inside respectively.

A preparation method of a high-efficiency cement concrete water reducing agent comprises the following steps:

putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a first reaction kettle through a feeding pipe at the top of the first reaction kettle, introducing circulating water of 40 ℃ into a spiral heat exchange pipe on the surface of the first reaction kettle through a water inlet pipe, continuously adding benzyl chloride into the first reaction kettle through the feeding pipe, starting a driving motor working switch at the top of the first reaction kettle, driving a reaction frame in the first reaction kettle to rotate through a driving motor output shaft, stirring and mixing raw materials in the first reaction kettle, after stirring and reacting for 5 hours, introducing cooling water into the spiral heat exchange pipe through the water inlet pipe, and cooling the raw materials in the first reaction kettle to room temperature;

step two, introducing circulating water of 40 ℃ into the spiral heat exchange tube on the surface of the first reaction kettle through a water inlet tube, adding diethyl ether into the first reaction kettle through a feed tube, continuously driving the reaction frame to rotate in the first reaction kettle through an output shaft of a driving motor, and reacting for 3 hours to obtain a monomer product;

starting a material pump working switch on the left side of the top of the vacuum drying box, extracting a monomer product in the reaction kettle I by using a material pump matched with a material pumping pipe, filtering the monomer product by using a filter screen in a filter frame before the monomer product enters the material pumping pipe, pumping the monomer product into a material box, introducing steam of 40 ℃ into the steam pipe, and drying the monomer product in the material box;

feeding methyl allyl polyoxyethylene ether and deionized water into the second reaction kettle through a feeding pipe at the top of the second reaction kettle, starting a driving motor working switch at the top of the second reaction kettle, rotating a reaction frame in the second reaction kettle to completely dissolve the methyl allyl polyoxyethylene ether, then feeding mercaptoacetic acid and an initiator a into the second reaction kettle through the feeding pipe, after reacting for 10min, starting a material pump working switch at the right side of the top of a vacuum drying box, pumping a monomer product in the material box into the second reaction kettle, feeding an initiator b into the second reaction kettle through the feeding pipe, introducing 50 ℃ circulating water into the spiral heat exchange pipe on the surface of the second reaction kettle, and carrying out constant-temperature stirring reaction for 2 h;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the second reaction kettle through a feeding pipe, adjusting the pH value of the reaction liquid in the second reaction kettle to be 7, and sending the reaction liquid in the second reaction kettle out through a discharging pipe to obtain the cement concrete water reducing agent.

(III) advantageous effects

The invention provides a high-efficiency cement concrete water reducing agent and a preparation method thereof. Compared with the prior art, the method has the following beneficial effects: the monomer product is prepared from dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor, and the methyl allyl polyoxyethylene ether is compounded to play a certain resistance role on clay, so that the fluidity of cement paste is effectively reduced, and the application range of the water reducer is improved; the integral production equipment is used for realizing the rapid preparation of the cement concrete water reducing agent, the monomer product is prepared in the reaction kettle I, the filtering component is used for filtering the monomer product, and the cleaning roller is matched for cleaning the inside of the meshes of the filter screen, so that the blockage of the inside of the meshes of the filter screen is effectively avoided, and the filtering treatment of the monomer product is smoothly completed; through starting the left material pump job switch in vacuum drying oven top, utilize material pump cooperation pumping pipe to extract reation kettle one inside monomer result, the monomer result carries out the filter material processing through the inside filter screen of filter frame before getting into pumping pipe inside, then the monomer result is by the inside of suction workbin, let in 40 ℃ steam to the inside of steam pipe, the monomer result to the workbin inside dries, two material pump cooperation vacuum drying casees, realize the full-automatic drying process of accomplishing the monomer result, carry out the built reaction with methyl allyl polyoxyethylene ether in reation kettle two's inside and monomer result at last, obtain high-efficiency cement concrete water-reducing agent, the leakproofness of material is guaranteed to whole preparation flow, avoid external pollution's emergence, and then effectively improve cement concrete water-reducing agent's preparation quality.

Drawings

FIG. 1 is a schematic view of the structure of an integrated production apparatus of the present invention;

FIG. 2 is a cross-sectional view of a first reactor configuration of the present invention;

FIG. 3 is a side view of the internal structure of the filter assembly of the present invention;

FIG. 4 is a top view of the internal structure of the heating assembly of the present invention;

fig. 5 is a sectional view showing the structure of the vacuum drying oven according to the present invention.

In the figure, 1, a base; 2. a first reaction kettle; 3. a second reaction kettle; 4. a vacuum drying oven; 5. a drive motor; 6. a reaction frame; 7. a heating assembly; 8. a thermal insulation sleeve; 9. a spiral heat exchange tube; 10. a water inlet pipe; 11. a water outlet pipe; 12. a filter assembly; 13. a filter frame; 14. filtering with a screen; 15. a linear motor; 16. cleaning the roller; 17. rotating the block; 18. a transmission groove; 19. a material box; 20. a steam pipe; 21. a material pump; 22. a material pumping pipe; 23. a discharge pipe; 24. a discharge pipe; 25. and (4) feeding a pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the efficient cement concrete water reducing agent comprises the following raw materials in parts by weight: 30 parts of methyl allyl polyoxyethylene ether, 8 parts of thioglycollic acid, 28 parts of dimethylaminoethyl methacrylate, 5 parts of dichloromethane, 12 parts of benzyl chloride, 12 parts of diethyl ether, 1 part of a polymerization inhibitor, 2 parts of an initiator a, 3 parts of an initiator b and 26 parts of deionized water;

the cement concrete water reducing agent is prepared by the following steps:

putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment together, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a reaction kettle I2 through a feeding pipe 25 at the top of the reaction kettle I2, introducing circulating water of 40 ℃ into a spiral heat exchange pipe 9 on the surface of the reaction kettle I2 through a water inlet pipe 10, continuously adding benzyl chloride into the reaction kettle I2 through the feeding pipe 25, starting a driving motor 5 working switch at the top of the reaction kettle I2, driving a reaction frame 6 in the reaction kettle I2 to rotate through an output shaft of the driving motor 5, stirring and mixing raw materials in the reaction kettle I2, after stirring and reacting for 5 hours, introducing cooling water into the spiral heat exchange pipe 9 through the water inlet pipe 10, and cooling the raw materials in the reaction kettle I2 to room temperature;

step two, introducing 40 ℃ circulating water into the spiral heat exchange tube 9 on the surface of the first reaction kettle 2 through the water inlet tube 10, adding diethyl ether into the first reaction kettle 2 through the feed tube 25, continuously driving the reaction frame 6 to rotate inside the first reaction kettle 2 through the output shaft of the driving motor 5, and reacting for 3 hours to obtain a monomer product;

starting a working switch of a material pump 21 on the left side of the top of the vacuum drying box 4, extracting the monomer products in the reaction kettle I2 by using the material pump 21 and a material pumping pipe 22, filtering the monomer products by a filter screen 14 in a filter frame 13 before the monomer products enter the material pumping pipe 22, then pumping the monomer products into a material box 19, introducing steam of 40 ℃ into a steam pipe 20, and drying the monomer products in the material box 19;

fourthly, feeding methyl allyl polyoxyethylene ether and deionized water into the second reaction kettle 3 through a feeding pipe 25 at the top of the second reaction kettle 3, starting a working switch of a driving motor 5 at the top of the second reaction kettle 3, rotating a reaction frame 6 in the second reaction kettle 3 to completely dissolve the methyl allyl polyoxyethylene ether, then feeding thioglycolic acid and an initiator a into the second reaction kettle 3 through the feeding pipe 25, after reacting for 10min, starting a material pump 21 working switch at the right side of the top of a vacuum drying box 4, pumping a monomer product in a material box 19 into the second reaction kettle 3, feeding an initiator b into the second reaction kettle 3 through the feeding pipe 25, introducing 50 ℃ circulating water into the spiral heat exchange pipe 9 on the surface of the second reaction kettle 3, and carrying out constant-temperature stirring reaction for 2 hours;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the second reaction kettle 3 through a feeding pipe 25, adjusting the pH value of the reaction liquid in the second reaction kettle 3 to 7, and sending the reaction liquid in the second reaction kettle 3 out through a discharging pipe 24 to obtain the cement concrete water reducing agent.

The polymerization inhibitor is p-tert-butyl catechol, the initiator a is hydrogen peroxide, and the initiator b is ascorbic acid.

Integrative production facility includes base 1, reation kettle 2, reation kettle 3 and vacuum drying case 4, the both sides at base 1 top are fixedly connected with reation kettle 2 and reation kettle 3 respectively, and the top of base 1 is located and is provided with vacuum drying case 4 between reation kettle 2 and the reation kettle 3, reation kettle 2 and reation kettle 3's top all is provided with driving motor 5, and reation kettle 2 and reation kettle 3's inside all is provided with reation frame 6, two one end of driving motor 5 output shaft runs through reation kettle 2 and reation kettle 3 respectively and extends to reation kettle 2 and reation kettle 3's inside, and the one end of two driving motor 5 output shafts passes through shaft coupling fixed connection with the top of two reation frame 6 respectively, reation kettle 2 and reation kettle 3's surface all is provided with heating element 7, heating element 7 includes heat preservation cover 8, Spiral heat exchange tube 9, inlet tube 10 and outlet pipe 11, the surface of reation kettle one 2 and reation kettle two 3 all is provided with insulation cover 8, and the inner wall of two insulation cover 8 all is provided with spiral heat exchange tube 9, the top intercommunication of spiral heat exchange tube 9 has inlet tube 10, and the bottom intercommunication of spiral heat exchange tube 9 has outlet pipe 11, two the internal surface of spiral heat exchange tube 9 contacts with reation kettle one 2 and reation kettle two 3's surface respectively, reation kettle one 2 inside below is provided with filter assembly 12, filter assembly 12 includes filter frame 13, filter screen 14, linear electric motor 15, cleaning roller 16, turning block 17, driving groove 18, the positive below of reation kettle one 2 is through screw fixed connection filter frame 13, and the inside of filter frame 13 is provided with filter screen 14, the inside top of filter frame 13 is provided with linear electric motor 15, and linear electric motor 15's bottom is provided with turning block 17, the bottom of the rotating block 17 is rotatably connected with a cleaning roller 16, a transmission groove 18 is formed in the lower portion inside the filter frame 13, the bottom end of the cleaning roller 16 is rotatably connected with the inside of the transmission groove 18, the surface of the cleaning roller 16 is in contact with one side of the filter screen 14, a material box 19 and a steam pipe 20 are arranged inside the vacuum drying box 4, material pumps 21 are arranged on two sides of the top of the vacuum drying box 4, the feeding ends of the two material pumps 21 are communicated with a material pumping pipe 22, the discharging ends of the two material pumps 21 are communicated with a material discharging pipe 23, one end of the material pumping pipe 22 positioned on the left side is communicated with the inside of a first reaction kettle 2, one end of the material pumping pipe 22 positioned on the right side is communicated with the lower portion inside the material box 19, one end of the material discharging pipe 23 positioned on the left side is communicated with the inside of the material box 19, one end of the material discharging pipe 23 positioned on the right side is communicated with the inside of a second reaction kettle 3, the inside below of reation kettle 2 and reation kettle two 3 all is provided with discharging pipe 24, and the inside of two discharging pipes 24 communicates with reation kettle 2 and reation kettle two 3's inside respectively, reation kettle 2 and reation kettle two 3's top all is provided with a plurality of inlet pipe 25, and the inside of a plurality of inlet pipe 25 communicates with reation kettle 2 and reation kettle two 3's inside respectively.

A preparation method of a high-efficiency cement concrete water reducing agent comprises the following steps:

putting dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor into integrated production equipment together, sequentially putting dimethylaminoethyl methacrylate, dichloromethane and the polymerization inhibitor into a reaction kettle I2 through a feeding pipe 25 at the top of the reaction kettle I2, introducing circulating water of 40 ℃ into a spiral heat exchange pipe 9 on the surface of the reaction kettle I2 through a water inlet pipe 10, continuously adding benzyl chloride into the reaction kettle I2 through the feeding pipe 25, starting a driving motor 5 working switch at the top of the reaction kettle I2, driving a reaction frame 6 in the reaction kettle I2 to rotate through an output shaft of the driving motor 5, stirring and mixing raw materials in the reaction kettle I2, after stirring and reacting for 5 hours, introducing cooling water into the spiral heat exchange pipe 9 through the water inlet pipe 10, and cooling the raw materials in the reaction kettle I2 to room temperature;

step two, introducing 40 ℃ circulating water into the spiral heat exchange tube 9 on the surface of the first reaction kettle 2 through the water inlet tube 10, adding diethyl ether into the first reaction kettle 2 through the feed tube 25, continuously driving the reaction frame 6 to rotate inside the first reaction kettle 2 through the output shaft of the driving motor 5, and reacting for 3 hours to obtain a monomer product;

starting a working switch of a material pump 21 on the left side of the top of the vacuum drying box 4, extracting the monomer products in the reaction kettle I2 by using the material pump 21 and a material pumping pipe 22, filtering the monomer products by a filter screen 14 in a filter frame 13 before the monomer products enter the material pumping pipe 22, then pumping the monomer products into a material box 19, introducing steam of 40 ℃ into a steam pipe 20, and drying the monomer products in the material box 19;

fourthly, feeding methyl allyl polyoxyethylene ether and deionized water into the second reaction kettle 3 through a feeding pipe 25 at the top of the second reaction kettle 3, starting a working switch of a driving motor 5 at the top of the second reaction kettle 3, rotating a reaction frame 6 in the second reaction kettle 3 to completely dissolve the methyl allyl polyoxyethylene ether, then feeding thioglycolic acid and an initiator a into the second reaction kettle 3 through the feeding pipe 25, after reacting for 10min, starting a material pump 21 working switch at the right side of the top of a vacuum drying box 4, pumping a monomer product in a material box 19 into the second reaction kettle 3, feeding an initiator b into the second reaction kettle 3 through the feeding pipe 25, introducing 50 ℃ circulating water into the spiral heat exchange pipe 9 on the surface of the second reaction kettle 3, and carrying out constant-temperature stirring reaction for 2 hours;

and fifthly, adding a sodium hydroxide solution with the mass concentration of 30% into the second reaction kettle 3 through a feeding pipe 25, adjusting the pH value of the reaction liquid in the second reaction kettle 3 to 7, and sending the reaction liquid in the second reaction kettle 3 out through a discharging pipe 24 to obtain the cement concrete water reducing agent.

And those not described in detail in this specification are well within the skill of those in the art.

When the integrated production equipment is used, dimethylaminoethyl methacrylate, dichloromethane and a polymerization inhibitor are sequentially put into a first reaction kettle 2 through a feeding pipe 25 at the top of the first reaction kettle 2, circulating water of 40 ℃ is introduced into a spiral heat exchange pipe 9 on the surface of the first reaction kettle 2 through a water inlet pipe 10, then benzyl chloride is continuously added into the first reaction kettle 2 through the feeding pipe 25, a driving motor 5 at the top of the first reaction kettle 2 is started to operate a switch, an output shaft of the driving motor 5 drives a reaction frame 6 inside the first reaction kettle 2 to rotate, raw materials inside the first reaction kettle 2 are stirred and mixed, after stirring reaction is carried out for 5 hours, cooling water is introduced into the spiral heat exchange pipe 9 through the water inlet pipe 10, and the raw materials inside the first reaction kettle 2 are cooled to room temperature;

introducing 40 ℃ circulating water into the spiral heat exchange tube 9 on the surface of the first reaction kettle 2 through the water inlet tube 10, adding diethyl ether into the first reaction kettle 2 through the feed tube 25, continuously driving the reaction frame 6 to rotate in the first reaction kettle 2 through the output shaft of the driving motor 5, and reacting for 3 hours to obtain a monomer product;

starting a working switch of a material pump 21 on the left side of the top of the vacuum drying box 4, extracting the monomer products in the first reaction kettle 2 by using the material pump 21 to match with a material pumping pipe 22, filtering the monomer products by a filter screen 14 in a filter frame 13 before the monomer products enter the material pumping pipe 22, pumping the monomer products into a material box 19, introducing steam of 40 ℃ into a steam pipe 20, and drying the monomer products in the material box 19;

putting methyl allyl polyoxyethylene ether and deionized water into a second reaction kettle 3 through a feeding pipe 25 at the top of the second reaction kettle 3, starting a working switch of a driving motor 5 at the top of the second reaction kettle 3, rotating a reaction frame 6 in the second reaction kettle 3 to completely dissolve the methyl allyl polyoxyethylene ether, then putting thioglycolic acid and an initiator a into the second reaction kettle 3 through the feeding pipe 25, after reacting for 10min, starting a working switch of a material pump 21 on the right side of the top of a vacuum drying box 4, pumping a monomer product in a material box 19 into the second reaction kettle 3, putting an initiator b into the second reaction kettle 3 through the feeding pipe 25, introducing 50 ℃ circulating water into a spiral heat exchange pipe 9 on the surface of the second reaction kettle 3, and carrying out constant-temperature stirring reaction for 2 h;

adding a sodium hydroxide solution with the mass concentration of 30% into the second reaction kettle 3 through the feeding pipe 25, adjusting the pH value of a reaction liquid in the second reaction kettle 3 to 7, and sending the reaction liquid in the second reaction kettle 3 out through the discharging pipe 24 to obtain the cement concrete water reducing agent.

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

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.