A continuous preparation device for polycarboxylate water reducer

Abstract

The present invention provides a continuous preparation device for polycarboxylic acid water reducer, which belongs to the technical field of water reducer preparation. It includes a primary mixing kettle, a titration mixing device and a support platform, wherein the titration mixing device is provided in multiple groups and all are connected to the primary mixing kettle, and multiple groups of the titration mixing devices and the primary mixing kettle are connected to the support platform, and the outer wall of the primary mixing kettle is fixedly connected to the top of the support platform, and a feeding trough is provided on the inner wall of the top of the primary mixing kettle, and a feeding pipe is fixedly installed on the outer wall of the primary mixing kettle, and the feeding pipe is connected to the feeding trough. The present invention arranges a primary mixing kettle and a mixing kettle so that the preparation of the water reducer is completed step by step in the primary mixing kettle and the mixing kettle to realize the continuous preparation of the water reducer, and at the same time, a ring spray assembly is arranged to accelerate the mixing of the macromonomer raw material and the initiator to improve the preparation efficiency, so as to solve the problem that the existing polycarboxylic acid water reducer has low preparation efficiency and colloid will appear on the kettle wall.

Description

Technical Field

[0001] The invention relates to the technical field of water reducing agent preparation, and in particular to a device for continuously preparing a polycarboxylic acid water reducing agent. Background Art

[0002] Polycarboxylate water reducer is a high-performance water reducer and a cement dispersant used in cement concrete. It is widely used in projects such as roads, bridges, dams, tunnels, and high-rise buildings.

[0003] The existing preparation method of polycarboxylic acid water reducer is usually divided into two steps. First, the macromonomer raw material is dissolved and mixed with the initiator. Then, the water reducer is prepared by titrating and adding the material and stirring. However, the titration takes a long time, while the macromonomer raw material and the initiator are mixed in a short time. Therefore, the water reducer cannot be prepared continuously in a short time.

[0004] Based on the above situation, if the water reducer needs to be prepared quickly and continuously, the mixing efficiency of the macromonomer raw material and the initiator needs to be accelerated. The existing stirring rod has low mixing efficiency and cannot complete the mixing of the macromonomer raw material and the initiator in a short time.

[0005] At the same time, during the titration process, if the stirring rod is long and the stirring paddle is close to the mixing kettle, the dripping material dripping from the burette is hit by the stirring paddle onto the inner wall of the mixing kettle, and then the titration material self-polymerizes in the solution with no chain transfer or little chain transfer, thereby forming a colloid on the inner wall of the mixing kettle.

[0006] Therefore, the present application provides a continuous preparation device for polycarboxylate water-reducing agent to meet the demand. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a continuous preparation device for a polycarboxylic acid water reducer. By setting a primary mixing kettle and a mixing kettle, the preparation of the water reducer is completed step by step in the primary mixing kettle and the mixing kettle to achieve continuous preparation of the water reducer. At the same time, a ring spray component is set to accelerate the mixing of the macromonomer raw material and the initiator to improve the preparation efficiency, so as to solve the problem that the existing polycarboxylic acid water reducer has low preparation efficiency and colloid will appear on the kettle wall.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A continuous preparation device for a polycarboxylate water-reducing agent comprises a primary mixing kettle, a titration mixing device and a support platform, wherein the titration mixing device is provided with a plurality of groups and all are connected to the primary mixing kettle, the plurality of groups of the titration mixing device and the primary mixing kettle are connected to the support platform, the outer wall of the primary mixing kettle is fixedly connected to the top of the support platform, a feeding trough is provided on the inner wall of the top of the primary mixing kettle, a feeding pipe is fixedly installed on the outer wall of the primary mixing kettle, and the feeding pipe is connected to the feeding trough, a downstream trough is provided on the inner wall of the primary mixing kettle, and the downstream trough is provided with a Multiple groups are evenly distributed on the inner wall of the primary mixing kettle, the tops of the multiple groups of downstream troughs are connected with the feeding trough, the inner wall of the primary mixing kettle is installed with a ring spray assembly, a solenoid valve 1 is fixedly installed at the bottom kettle port of the primary mixing kettle, a discharge pipe is fixedly installed at the output port of the solenoid valve 1, a three-way valve is fixedly installed at the other pipe port of the discharge pipe, the middle valve port of the three-way valve is connected with the titration mixing device, a connecting pipe is fixedly installed at the bottom valve port of the three-way valve, and the other pipe port of the connecting pipe is fixedly connected to another group of three-way valves.

[0010] Optionally, the inner wall at the top of the primary mixing kettle is rotatably connected to a clamping ring through a bearing, and the ring spray assembly includes a three-dimensional four-way pipe, the inner wall of the clamping ring is rotatably connected to the outer wall at the top of the three-dimensional four-way pipe through a bearing, the three-dimensional four-way pipe bottom three pipe openings are arranged at 120° to each other and at 45° to the horizontal plane, the top pipe opening of the three-dimensional four-way pipe is sealed and fixedly connected with a sealing cover, and the top inner wall of the sealing cover is sealed and fixedly installed with an injection pipe, the injection pipe is provided in multiple groups, and all are connected to the inside of the three-dimensional four-way pipe, the three bottom pipe openings of the three-dimensional four-way pipe are fixedly installed with solenoid valve 2, and the other end of the solenoid valve 2 is fixedly installed with a conical nozzle, and the mouth of the conical nozzle is located above the downstream groove.

[0011] Optionally, positioning seats are fixedly installed on the outer walls of the three pipe openings at the bottom of the three-dimensional four-way pipe, and the side walls of two adjacent groups of the positioning seats are fixedly connected by bolts. The inner walls of the three groups of positioning seats are rotatably connected to the same annular bushing, and the inner wall of the annular bushing is rotatably connected to an inner gear ring. A positioning shaft is fixedly installed on the inner wall of the bottom kettle opening of the primary mixing kettle, and a gear one is fixedly installed on the top of the positioning shaft, and the gear one is meshed with the inner gear ring.

[0012] Optionally, a bottom shell is fixedly installed on the inner wall of the middle part of the primary mixing kettle, the positioning shaft passes through the bottom shell, a rotating sleeve is sleeved on the outer wall of the top of the positioning shaft, an outer gear ring 1 is fixedly installed on the outer wall of the bottom of the rotating sleeve, and the outer gear ring 1 is located inside the bottom shell, the bottom shell is rotatably connected to the rotating sleeve, a conductive slip ring is fixedly installed on the outer wall of the rotating sleeve, and the conductive slip ring is electrically connected to the solenoid valve 2, the top of the rotating sleeve is fixedly connected to the positioning seat by bolts, the inner wall of the bottom shell is rotatably connected to gear 2, and gear 2 is meshed with outer gear ring 1, a motor 1 is fixedly installed on the bottom of the bottom shell, and the output end of motor 1 is fixedly connected to gear 2.

[0013] Optionally, the titration mixing device includes a mixing kettle, the outer wall of the mixing kettle is fixedly connected to the inner wall of the support platform, an outer sleeve is fixedly installed on the inner wall at the center of the top of the mixing kettle, an outer sleeve is fixedly installed on the bottom of the outer sleeve, and the outer sleeve coincides with the center line of the outer sleeve, the inner wall of the outer sleeve is rotatably connected to the inner tube through a bearing, a guide tube is sealed and fixedly connected to the bottom of the inner tube, an inner sleeve is fixedly installed on the bottom of the guide tube, the inner sleeve is located inside the outer sleeve, and the center lines coincide, the outer sleeve is provided with a throw-out groove on the outer sleeve and the inner sleeve, and the throw-out groove is provided in multiple groups and is evenly distributed on the outer sleeve and the inner sleeve, the throw-out groove on the outer sleeve forms an angle of 60° with the horizontal plane, and the throw-out groove on the inner sleeve is vertically arranged with the horizontal plane, an outer gear ring 2 is fixedly installed on the outer wall of the top of the inner tube, a gear 3 is rotatably connected to the top of the mixing kettle, and the gear 3 is meshed with the outer gear ring 2, a motor 2 is fixedly installed on the top of the mixing kettle, and the output end of the motor 2 is fixedly connected to the gear 3.

[0014] Optionally, an inlet pipe is provided on the top of the mixing kettle, the top pipe opening of the inlet pipe is sealed and connected to the output pipe opening of the three-way valve, a rotating joint is fixedly installed on the bottom pipe opening of the inlet pipe, the other end of the rotating joint is sealed and connected to the top of the inner tube, a solenoid valve three is fixedly installed on the valve opening at the bottom of the mixing kettle, burettes are fixedly installed on both sides of the top of the mixing kettle, an annular electric heating plate one is sleeved on the outer wall of the primary mixing kettle, and an annular electric heating plate two is sleeved on the outer wall of the mixing kettle.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In the above scheme, a primary mixing kettle is provided, and macromonomer raw materials, acrylic acid, sodium methacrylic acid sulfonate and ammonium persulfate solution are added into the primary mixing kettle for mixing, so that a mixed liquid without added materials is formed in the primary mixing kettle, and the raw materials in the primary mixing kettle are transported to different titration mixing devices in batches for titration, so that the polycarboxylic acid water reducer can be prepared uninterruptedly.

[0017] A mixed solution of acrylic acid solution, sodium methacrylate sulfonate solution and ammonium persulfate solution is slowly introduced into the feeding tank in proportion through the feeding pipe, so that it flows along the downstream groove to the bottom of the primary mixing kettle. During this process, the solenoid valve 2 at the bottom of the three-dimensional four-way pipe is opened, so that the hexamethylene polyoxyethylene ether solution in the three-dimensional four-way pipe can be sprayed into the downstream groove by the conical nozzle, fully mixed with the mixed solution in the downstream groove, and flowed to the bottom of the primary mixing kettle along the downstream groove, thereby accelerating the mixing of the hexamethylene polyoxyethylene ether solution and the initiator.

[0018] By driving motor 2 to drive gear 3 to mesh with outer gear ring 2, the inner tube is driven to rotate, so that the inner ring rotates synchronously inside the outer ring. At this time, the solution around the inner ring will be thrown out from the throwing-out groove on the outer ring under the action of the inner ring. At the same time, the solution on the top of the outer ring will enter the inner ring under the action of extrusion, thereby achieving the stirring effect. Since the outer ring and the inner ring are located at the bottom of the mixing kettle and away from the inner wall of the mixing kettle, when the mixed liquid in the mixing kettle is stirred during the titration process, it can effectively prevent the formation of rubber blocks on the inner wall of the mixing kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a continuous preparation device for polycarboxylate water-reducing agent;

[0021] Figure 2 It is a structural diagram of the connection between the primary mixing kettle and the titration mixing device;

[0022] Figure 3 This is a schematic diagram of the installation of the ring spray assembly in the primary mixing kettle;

[0023] Figure 4 is a cross-sectional view of a primary mixing kettle;

[0024] Figure 5 It is a structural schematic diagram of the ring spray assembly;

[0025] Figure 6 is a schematic diagram of the structure inside the bottom shell;

[0026] Figure 7 It is a schematic diagram of the installation of the positioning seat on the three-dimensional four-way pipe;

[0027] Figure 8 This is a schematic diagram of the installation of the positioning shaft and the positioning seat;

[0028] Fig. 9 It is the assembly diagram of three sets of positioning seats;

[0029] Fig.10 It is a schematic diagram of the installation of the positioning shaft and the rotating sleeve;

[0030] Fig.11 It is a structural schematic diagram of a titration mixing device;

[0031] Fig.12 is a cross-sectional view of a mixing kettle;

[0032] Fig.13 is a schematic diagram of the structure of the outer sleeve;

[0033] Fig.14 This is the installation position diagram of the inner tube;

[0034] Fig.15 It is a schematic diagram of the installation structure of the outer ring and the inner ring.

[0035] Reference numerals:

[0036] Primary mixing kettle 100, feeding trough 101, feeding pipe 102, downstream trough 103, solenoid valve 104, clamping ring 105, discharge pipe 106, annular electric heating plate 110, annular spray assembly 120, three-dimensional four-way pipe 121, sealing cover 122, injection pipe 123, solenoid valve 124, conical nozzle 125, positioning seat 126, annular bushing 127, inner gear ring 128, bottom shell 130, positioning shaft 131, rotating sleeve 132, outer gear ring 133, gear 134, 4. Conductive slip ring 135, gear 2 136, motor 1 137, three-way valve 140, connecting pipe 150, titration mixing device 200, mixing kettle 210, outer sleeve 211, outer ring 212, inner tube 213, outlet pipe 214, inner ring 215, ejection groove 216, outer gear ring 2 217, gear 3 218, motor 2 219, inlet pipe 220, rotary joint 221, solenoid valve 3 230, burette 240, annular electric heating plate 2 250, support platform 300.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following is a detailed description of a polycarboxylate water-reducing agent continuous preparation device provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0039] like Figures 1 to 15As shown, an embodiment of the present invention provides a continuous preparation device for polycarboxylate water-reducing agent, comprising a primary mixing kettle 100, a titration mixing device 200 and a support platform 300. The titration mixing device 200 is provided with a plurality of groups, and all are connected to the primary mixing kettle 100. The plurality of groups of titration mixing devices 200 and the primary mixing kettle 100 are connected to the support platform 300. In the present invention, the primary mixing kettle 100 can complete the mixing of the macromonomer raw material and the initiator. By transporting the raw materials in the primary mixing kettle 100 to different titration mixing devices 200 for titration in batches, the polycarboxylate water-reducing agent can be prepared uninterruptedly. The primary mixing kettle 100 The outer wall is fixedly connected to the top of the support platform 300, a feeding trough 101 is provided on the inner wall of the top of the primary mixing kettle 100, a feeding pipe 102 is fixedly installed on the outer wall of the primary mixing kettle 100, and the feeding pipe 102 is connected to the feeding trough 101, a downstream trough 103 is provided on the inner wall of the primary mixing kettle 100, and a plurality of groups of downstream troughs 103 are provided and evenly distributed on the inner wall of the primary mixing kettle 100, and the tops of the plurality of groups of downstream troughs 103 are all connected to the feeding trough 101, and a ring spray assembly 120 is installed on the inner wall of the primary mixing kettle 100, and the ring spray assembly 120 can spray the ejected macromonomer solution into the downstream trough 103, thereby realizing the macromonomer The solution and the initiator are mixed, the bottom of the primary mixing kettle 100 is fixedly installed with a solenoid valve 104, the output port of the solenoid valve 104 is fixedly installed with a discharge pipe 106, the other pipe port of the discharge pipe 106 is fixedly installed with a three-way valve 140, the middle valve port of the three-way valve 140 is connected to the titration mixing device 200, the bottom valve port of the three-way valve 140 is fixedly installed with a connecting pipe 150, and the other pipe port of the connecting pipe 150 is fixedly connected to another set of three-way valves 140. In the present invention, acrylic acid solution, sodium methacrylate sulfonate solution and the reaction mixture are slowly introduced into the feeding tank 101 in proportion through the feeding pipe 102. The mixed liquid of the ammonium sulfate solution is used as an initiator for the raw materials, so that it flows along the downstream groove 103 to the bottom of the primary mixing kettle 100. During this process, the solenoid valve 124 at the bottom of the three-dimensional four-way pipe 121 is opened, so that the hexamethylene polyoxyethylene ether solution in the three-dimensional four-way pipe 121 can be sprayed into the downstream groove 103 by the conical nozzle 125, fully mixed with the mixed liquid in the downstream groove 103, and flows along the downstream groove 103 to the bottom of the primary mixing kettle 100. At the same time, the annular electric heating plate 110 is energized to keep the solution temperature in the primary mixing kettle 100 at about 70°C.

[0040] In this embodiment, if Figure 3 and Figure 7As shown, the inner wall of the top of the primary mixing kettle 100 is rotatably connected to a clamping ring 105 through a bearing, the ring spray assembly 120 includes a three-dimensional four-way pipe 121, the inner wall of the clamping ring 105 is rotatably connected to the outer wall of the top of the three-dimensional four-way pipe 121 through a bearing, the clamping ring 105 supports the three-dimensional four-way pipe 121, the three-dimensional four-way pipe 121 has three pipe openings at the bottom arranged at 120° to each other and at 45° to the horizontal plane, the top pipe opening of the three-dimensional four-way pipe 121 is sealed and fixedly connected with a sealing cover 122, the sealing cover 122 can prevent the mixed liquid from overflowing from the top of the three-dimensional four-way pipe 121 during the rotation of the three-dimensional four-way pipe 121, the top inner wall of the sealing cover 122 is sealed and fixedly installed with an injection pipe 123, the injection pipe 123 is provided with a plurality of groups, and all are connected to the inside of the three-dimensional four-way pipe 121, and the macromonomer raw material and water can be injected into the injection pipe 123. For injection, the three pipe openings at the bottom of the three-dimensional four-way tube 121 are fixedly installed with electromagnetic valve 2 124, and the other end of the electromagnetic valve 2 124 is fixedly installed with a conical nozzle 125, and the mouth of the conical nozzle 125 is located above the downstream groove 103. In the present invention, a total amount of 360 kg of hexamethylene polyoxyethylene ether macromonomer is continuously injected into the three-dimensional four-way tube 121 in batches through the injection pipe 123, and a total amount of 350 kg of 80°C water is injected in proportion. During this process, the driving motor 137 drives the gear 2 136 to engage with the outer gear ring 133, so that the rotating sleeve 132 drives the positioning seat 126 to rotate, thereby rotating the three-dimensional four-way tube 121, so that the hexamethylene polyoxyethylene ether macromonomer in the three-dimensional four-way tube 121 is completely dissolved, and the temperature is maintained at about 30°C.

[0041] As an implementation method in this embodiment, Figures 3 to 10 As shown, positioning seats 126 are fixedly installed on the outer walls of the three pipe openings at the bottom of the three-dimensional four-way pipe 121, and the side walls of two adjacent groups of positioning seats 126 are fixedly connected by bolts. The inner walls of the three groups of positioning seats 126 are rotatably connected to the same annular bushing 127, and the inner wall of the annular bushing 127 is rotatably connected to the inner ring gear 128. A positioning shaft 131 is fixedly installed on the inner wall of the bottom kettle opening of the primary mixing kettle 100, and a gear 134 is fixedly installed on the top of the positioning shaft 131, and the gear 134 is meshed with the inner ring gear 128. The meshing of the gear 134 and the inner ring gear 128 can ensure the stable rotation of the three groups of positioning seats 126.

[0042] A bottom shell 130 is fixedly installed on the inner wall of the middle part of the primary mixing kettle 100, a positioning shaft 131 passes through the bottom shell 130, a rotating sleeve 132 is sleeved on the outer wall of the top of the positioning shaft 131, an outer gear ring 133 is fixedly installed on the outer wall of the bottom of the rotating sleeve 132, and the outer gear ring 133 is located inside the bottom shell 130, the bottom shell 130 is rotatably connected to the rotating sleeve 132, a conductive slip ring 135 is fixedly installed on the outer wall of the rotating sleeve 132, and the conductive slip ring 135 is electrically connected to the electromagnetic valve 124, the conductive slip ring 135 can supply power to the electromagnetic valve 124, the top of the rotating sleeve 132 is fixedly connected to the positioning seat 126 by bolts, a gear 2 136 is rotatably connected to the inner wall of the bottom shell 130, and the gear 2 136 is meshed with the outer gear ring 133, a motor 137 is fixedly installed at the bottom of the bottom shell 130, and the output end of the motor 137 is fixedly connected to the gear 2 136.

[0043] As an implementation method in this embodiment, Figures 11 to 15As shown, the titration mixing device 200 includes a mixing kettle 210, the outer wall of the mixing kettle 210 is fixedly connected to the inner wall of the support platform 300, an outer sleeve 211 is fixedly installed on the inner wall at the top center of the mixing kettle 210, an outer sleeve ring 212 is fixedly installed on the bottom of the outer sleeve 211, and the outer sleeve ring 212 coincides with the center line of the outer sleeve 211, the inner wall of the outer sleeve 211 is rotatably connected to an inner tube 213 through a bearing, the bottom of the inner tube 213 is sealed and fixedly connected to a guide tube 214, and the bottom of the guide tube 214 is fixedly installed with an inner sleeve Ring 215, the inner ring 215 is located inside the outer ring 212, and the midlines coincide with each other. The outer ring 212 and the inner ring 215 are both provided with ejection grooves 216, and there are multiple groups of ejection grooves 216, which are evenly distributed on the outer ring 212 and the inner ring 215. The ejection grooves 216 on the outer ring 212 form an angle of 60° with the horizontal plane, and the ejection grooves 216 on the inner ring 215 are vertically arranged with the horizontal plane. The outer wall of the top of the inner tube 213 is fixedly installed with an outer toothed ring 217. The top of the mixing kettle 210 is rotatably connected with a gear 3 218, and the gear 3 218 is meshed with the outer gear ring 217. A motor 219 is fixedly installed on the top of the mixing kettle 210, and the output end of the motor 219 is fixedly connected with the gear 3 218. In the present invention, the motor 219 is driven to drive the gear 3 218 to mesh with the outer gear ring 217, thereby driving the inner tube 213 to rotate, so that the inner ring 215 rotates synchronously inside the outer ring 212. At this time, the inner ring 215 is rotated around The solution will be thrown out from the throwing-out groove 216 on the outer ring 212 under the action of the inner ring 215, and at the same time, the solution on the top of the outer ring 212 will enter the inner ring 215 under the action of squeezing, thereby achieving the stirring effect. In particular, since the outer ring 212 and the inner ring 215 are located at the bottom of the mixing kettle 210 and away from the inner wall of the mixing kettle 210, when the mixed liquid in the mixing kettle 210 is stirred during the titration process, it can effectively prevent the generation of rubber blocks on the inner wall of the mixing kettle 210.

[0044] In this embodiment, if Figure 1 and Fig.11 As shown, an inlet pipe 220 is provided at the top of the mixing kettle 210, and the top pipe opening of the inlet pipe 220 is sealed and connected to the output pipe opening of the three-way valve 140, a rotary joint 221 is fixedly installed at the bottom pipe opening of the inlet pipe 220, and the other end of the rotary joint 221 is sealed and connected to the top of the inner tube 213, a solenoid valve three 230 is fixedly installed at the valve opening at the bottom of the mixing kettle 210, and burettes 240 are fixedly installed on both sides of the top of the mixing kettle 210. Installing the burettes 240 on both sides of the mixing kettle 210 can effectively prevent the generation of rubber blocks on the inner wall of the mixing kettle 210, and the outer wall of the primary mixing kettle 100 is sleeved with an annular electric heating plate one 110, and the outer wall of the mixing kettle 210 is sleeved with an annular electric heating plate two 250.

[0045] The preparation process of the technical solution provided by the present invention is as follows:

[0046] S1: A total amount of 360 kg of hexamethylene polyoxyethylene ether macromonomer is continuously injected into the three-dimensional four-way tube 121 in batches through the injection pipe 123, and a total amount of 350 kg of 80° C. water is injected in proportion. During this process, the driving motor 137 drives the gear 2 136 to mesh with the outer gear ring 133, so that the rotating sleeve 132 drives the positioning seat 126 to rotate, thereby rotating the three-dimensional four-way tube 121, so that the hexamethylene polyoxyethylene ether macromonomer in the three-dimensional four-way tube 121 is completely dissolved, and the temperature is maintained at about 30° C.;

[0047] S2: slowly introduce a mixture of acrylic acid solution (27 kg acrylic acid diluted with 73 kg water), sodium methacrylate sulfonate solution (4.8 kg sodium methacrylate sulfonate diluted with 45.2 kg water) and ammonium persulfate solution (3.6 kg dissolved with 46.4 kg water) into the feeding tank 101 through the feeding pipe 102, so that it flows along the downstream tank 103 to the bottom of the primary mixing kettle 100. In this process, the solenoid valve 2 124 at the bottom of the three-dimensional four-way pipe 121 is opened, so that the hexamethylene polyoxyethylene ether solution in the three-dimensional four-way pipe 121 can be sprayed into the downstream tank 103 by the conical nozzle 125, fully mixed with the mixed solution in the downstream tank 103, and flow into the bottom of the primary mixing kettle 100 along the downstream tank 103. At the same time, the annular electric heating plate 110 is energized so that the temperature of the solution in the primary mixing kettle 100 is always maintained at about 70°C;

[0048] S3: After the batch of macromonomer solution and initiator are mixed, the mixed liquid in the primary mixing kettle 100 is discharged into the corresponding introduction pipe 220 in sequence through the discharge pipe 106, the three-way valve 140 and the connecting pipe 150 by opening the solenoid valve 104, and then introduced into the inner tube 213 through the rotary joint 221, and finally falls into the mixing kettle 210 from the bottom of the outlet pipe 214 connected to the inner tube 213. In this process, the driving motor 219 drives the gear 3 218 to mesh with the outer gear ring 217, thereby driving the inner tube 213 to rotate, so that the inner ring 215 rotates synchronously inside the outer ring 212. At this time, the solution around the inner ring 215 will be thrown out by the throwing groove 216 on the outer ring 212 under the action of the inner ring 215, and at the same time, the solution on the top of the outer ring 212 will enter the inner ring 215 under the action of the extrusion, thereby achieving the stirring effect;

[0049] S4: While stirring the solution, a bleaching solution (3 kg of sodium formaldehyde sulfoxylate is dissolved in 87 kg of water) is dripped into the mixing kettle 210 through two sets of burettes 240 according to the total amount of the macromonomer, and the titration duration is controlled to be 3 hours, followed by insulation for 1 hour. During this process, the mixed solution in the mixing kettle 210 is fully stirred by the outer ring 212 and the inner ring 215, and the annular electric heating plate 250 is powered on at the same time, so that the solution temperature in the mixing kettle 210 is always maintained at about 80°C;

[0050] S5: After the heat preservation is completed, the annular electric heating plate 250 is turned off and the electromagnetic valve 3 230 is opened to release the finished product in the mixing kettle 210. After that, the product can be obtained after the temperature is lowered to 40°C.

[0051] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A continuous preparation device for a polycarboxylate water-reducing agent, comprising a primary mixing kettle (100), a titration mixing device (200) and a support platform (300), wherein the titration mixing device (200) is provided in multiple groups and all are connected to the primary mixing kettle (100), and the multiple groups of the titration mixing device (200) and the primary mixing kettle (100) are connected to the support platform (300), characterized in that: The outer wall of the primary mixing kettle (100) is fixedly connected to the top of the support platform (300); a feeding trough (101) is provided on the inner wall of the top of the primary mixing kettle (100); a feeding pipe (102) is fixedly installed on the outer wall of the primary mixing kettle (100), and the feeding pipe (102) is connected to the feeding trough (101); a downstream trough (103) is provided on the inner wall of the primary mixing kettle (100); a plurality of groups of the downstream troughs (103) are provided and are evenly distributed on the inner wall of the primary mixing kettle (100); the tops of the plurality of groups of the downstream troughs (103) are all connected to the feeding trough (101); The inner wall of the (100) is provided with a ring spray assembly (120); a solenoid valve (104) is fixedly installed at the bottom of the primary mixing kettle (100); a discharge pipe (106) is fixedly installed at the output port of the solenoid valve (104); a three-way valve (140) is fixedly installed at the other pipe port of the discharge pipe (106); a middle valve port of the three-way valve (140) is connected to a titration mixing device (200); a connecting pipe (150) is fixedly installed at the bottom valve port of the three-way valve (140); and the other pipe port of the connecting pipe (150) is fixedly connected to another set of three-way valves (140); The inner wall of the top of the primary mixing kettle (100) is rotatably connected to a clamping ring (105) via a bearing. The annular spray assembly (120) comprises a three-dimensional four-way pipe (121). The inner wall of the clamping ring (105) is rotatably connected to the outer wall of the top of the three-dimensional four-way pipe (121) via a bearing. The three-dimensional four-way pipe (121) has three pipe openings at the bottom arranged at 120 degrees to each other and at 45 degrees to the horizontal plane. The top pipe opening of the three-dimensional four-way pipe (121) is sealed and fixedly connected to a sealing cover ( 122), a material injection tube (123) is sealed and fixedly installed on the inner wall of the top of the sealing cover (122), a plurality of material injection tubes (123) are provided, and all are connected to the inside of the three-dimensional four-way tube (121), and three tube openings at the bottom of the three-dimensional four-way tube (121) are all fixedly installed with a second solenoid valve (124), and a conical nozzle (125) is fixedly installed at the other end of the second solenoid valve (124), and the mouth of the conical nozzle (125) is located above the downstream groove (103).

2. A continuous preparation device for polycarboxylate water-reducing agent according to claim 1, characterized in that: Positioning seats (126) are fixedly mounted on the outer walls of the three pipe openings at the bottom of the three-dimensional four-way pipe (121); the side walls of two adjacent groups of the positioning seats (126) are fixedly connected by bolts; the inner walls of the three groups of the positioning seats (126) are rotatably connected to the same annular bushing (127); the inner wall of the annular bushing (127) is rotatably connected to an inner gear ring (128); a positioning shaft (131) is fixedly mounted on the inner wall of the bottom opening of the primary mixing kettle (100); a gear one (134) is fixedly mounted on the top of the positioning shaft (131); and the gear one (134) is meshed with the inner gear ring (128).

3. A continuous preparation device for polycarboxylate water-reducing agent according to claim 2, characterized in that: A bottom shell (130) is fixedly mounted on the inner wall of the middle part of the primary mixing kettle (100); the positioning shaft (131) passes through the bottom shell (130); a rotating sleeve (132) is sleeved on the top outer wall of the positioning shaft (131); an outer toothed ring (133) is fixedly mounted on the bottom outer wall of the rotating sleeve (132); the outer toothed ring (133) is located inside the bottom shell (130); the bottom shell (130) is rotatably connected to the rotating sleeve (132); and the outer wall of the rotating sleeve (132) is fixedly mounted on the bottom outer wall of the rotating sleeve (132). A conductive slip ring (135) is installed, and the conductive slip ring (135) is electrically connected to the second solenoid valve (124); the top of the rotating sleeve (132) is fixedly connected to the positioning seat (126) by bolts; the inner wall of the bottom shell (130) is rotatably connected to the second gear (136), and the second gear (136) is meshed with the first outer gear ring (133); the bottom of the bottom shell (130) is fixedly installed with the first motor (137), and the output end of the first motor (137) is fixedly connected to the second gear (136).

4. A continuous preparation device for polycarboxylate water-reducing agent according to claim 3, characterized in that: The titration mixing device (200) comprises a mixing kettle (210), the outer wall of the mixing kettle (210) being fixedly connected to the inner wall of a support platform (300), an outer sleeve (211) being fixedly installed on the inner wall at the top center of the mixing kettle (210), an outer sleeve ring (212) being fixedly installed on the bottom of the outer sleeve (211), and the center lines of the outer sleeve ring (212) and the outer sleeve (211) coincide with each other, the inner wall of the outer sleeve (211) being rotatably connected to an inner tube (213) via a bearing, a guide tube (214) being sealed and fixedly connected to the bottom of the inner tube (213), an inner sleeve ring (215) being fixedly installed on the bottom of the guide tube (214), the inner sleeve ring (215) being located inside the outer sleeve ring (212), and the center lines of the outer sleeve ring (212) and the inner sleeve ring coincide with each other, (215) are provided with ejection grooves (216), and the ejection grooves (216) are provided in multiple groups and are evenly distributed on the outer ring (212) and the inner ring (215). The ejection grooves (216) located on the outer ring (212) form an angle of 60° with the horizontal plane, and the ejection grooves (216) located on the inner ring (215) are vertically arranged with the horizontal plane. The outer wall of the top of the inner tube (213) is fixedly installed with an outer gear ring 2 (217). The top of the mixing kettle (210) is rotatably connected with a gear 3 (218), and the gear 3 (218) is meshed with the outer gear ring 2 (217). The top of the mixing kettle (210) is fixedly installed with a motor 2 (219), and the output end of the motor 2 (219) is fixedly connected with the gear 3 (218).

5. A continuous preparation device for polycarboxylate water-reducing agent according to claim 4, characterized in that: An inlet pipe (220) is provided at the top of the mixing kettle (210), the top pipe opening of the inlet pipe (220) is in sealed communication with the output pipe opening of the three-way valve (140), a rotary joint (221) is fixedly installed at the bottom pipe opening of the inlet pipe (220), the other end of the rotary joint (221) is in sealed communication with the top of the inner tube (213), a solenoid valve three (230) is fixedly installed at the valve opening at the bottom of the mixing kettle (210), burettes (240) are fixedly installed on both sides of the top of the mixing kettle (210), an annular electric heating plate one (110) is sleeved on the outer wall of the primary mixing kettle (100), and an annular electric heating plate two (250) is sleeved on the outer wall of the mixing kettle (210).

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