Low-pollution concrete expansive agent preparation system

Abstract

The utility model relates to the field of industrial preparation of concrete expansive agents, and discloses a low-pollution concrete expansive agent preparation system which comprises a plurality of rotating limiting wheels, the exteriors of the rotating limiting wheels are connected to the interior of a fixed connecting frame in a sliding mode, and the inward sides of the rotating limiting wheels are rotationally connected with fine hole screening plates. And a coarse hole screening plate is fixedly connected to the other end of the fixed connecting plate, a screening assembly is fixedly connected to the interior of the fixed connecting frame, a crushing box is fixedly connected to the top of the fixed base, and two rotating crushing rollers are rotationally connected to the interior of the crushing box. According to the utility model, raw materials are put into the crushing box and are crushed by using the two rotating crushing rollers, the crushed raw materials are screened to a proper particle size through cooperation of the coarse-hole screening plate and the fine-hole screening plate, the screened raw materials are fed into the pulse type reaction kettle for reaction, and the stirring speed and temperature are controlled, so that the reaction efficiency is improved; and the production period is shortened.

Description

Technical Field

[0001] This utility model relates to the field of industrial preparation of concrete expansion agents, and in particular to a low-pollution concrete expansion agent preparation system. Background Technology

[0002] With increasingly stringent environmental protection requirements, traditional concrete expansion agent production equipment can no longer meet the needs of modern industry in terms of environmental performance and efficiency. Existing equipment generally suffers from problems such as high dust emissions, high energy consumption, and low production efficiency, leading to increased production costs and difficulty in meeting international environmental standards. In recent years, the technological development of environmentally friendly building materials production equipment has mainly focused on reducing pollutant emissions, improving energy utilization, and optimizing production processes.

[0003] A search revealed Chinese Patent Publication No. CN204411738U, which discloses an extraction system for a high-efficiency concrete expansive agent, belonging to the technical field of high-efficiency concrete expansive agent preparation. This utility model's high-efficiency concrete expansive agent extraction system includes a balance tank connected to a feed pipe, a preheater connected to the balance tank, a three-stage evaporator-condenser, and two spiral tube coolers. The preheater is connected to the evaporator-condenser, and the spiral tube coolers are connected to a discharge pipe. This utility model's high-efficiency concrete expansive agent extraction system is mainly used to extract it from a mixture containing a high-efficiency concrete expansive agent. It has a simple structure, is easy to operate, convenient to use, and highly automated, greatly reducing manual operation and lowering labor costs. However, in practical use, the above-mentioned device has drawbacks: although it can achieve continuous production, the reaction efficiency is low and energy consumption is high, resulting in low efficiency and a prolonged production cycle. Therefore, a low-pollution concrete expansive agent preparation system is proposed to solve these problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-pollution concrete expansion agent preparation system, which aims to improve the problems of low reaction efficiency and high energy consumption in the existing technology, which can achieve continuous production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-pollution concrete expansion agent preparation system, comprising a fixed base, characterized in that: a fixed connecting frame is fixedly connected to the top of the fixed base, a pre-reaction mechanism is slidably connected inside the fixed connecting frame, a pulse-type reaction vessel is fixedly connected to the top of the fixed base, and a drying mechanism is fixedly connected to the top of the fixed base.

[0006] The pre-reaction mechanism includes multiple rotating limiting wheels, the outer side of which is slidably connected to the inside of the fixed connecting frame. A fine-pore screening plate is rotatably connected to one side of the rotating limiting wheel. Two fixed connecting plates are fixedly connected to both sides of the fine-pore screening plate. A coarse-pore screening plate is fixedly connected to the other end of the fixed connecting plate. A collection box is fixedly connected to the top of the fixed base. A screening assembly is fixedly connected inside the fixed connecting frame. A crushing box is fixedly connected to the top of the fixed base. Two rotating crushing rollers are rotatably connected inside the crushing box. A drive assembly is fixedly connected inside the fixed base.

[0007] The above technical solutions improve the accuracy and efficiency of raw material processing through the design of the system's rotating limit wheel, screening plate, and crushing roller. At the same time, the cooperation between the collection box and the drive components ensures the stability and automation of the operation, effectively reducing pollution.

[0008] As a further description of the above technical solution:

[0009] The drying mechanism includes a heating fan, the bottom of which is fixedly connected to the top of the fixed base. A transport pipe is fixedly connected to the outside of the heating fan, and a heater is fixedly connected to the outside of the transport pipe. A fluidized bed is fixedly connected to the other end of the transport pipe, and a discharge assembly is fixedly connected to the outside of the fluidized bed. A cyclone separator and a dust removal assembly are fixedly connected to the top of the fixed base.

[0010] The above technical solutions effectively remove dust through cyclone separators and dust removal components, improving the cleanliness and efficiency of the system. The discharge components facilitate efficient material discharge, and the overall design enhances the automation and environmental friendliness of the drying process.

[0011] As a further description of the above technical solution:

[0012] The screening assembly includes a first motor, the bottom of which is fixedly connected inside the fixed connecting frame. The drive end of the first motor is fixedly connected to a first rotating connecting shaft. A rotating eccentric wheel is fixedly connected to the outside of the first rotating connecting shaft. A transmission connecting shaft is rotatably connected to the outside of the rotating eccentric wheel.

[0013] Through the above technical solutions, the design of the eccentric wheel optimizes the stability and accuracy of the screening action, improves the efficiency of material screening, and enhances the automation and screening effect of the system through the overall structure.

[0014] As a further description of the above technical solution:

[0015] The drive assembly includes a second motor, which is externally fixedly connected to the inside of the fixed base. The drive end of the second motor is fixedly connected to a second rotary connecting shaft, and a rotation transmission wheel is fixedly connected to the outside of the second rotary connecting shaft.

[0016] The above technical solution features a simple and stable structural design, improves the system's driving efficiency and operational reliability, ensures the coordinated work of various components, and enhances the automation and stability of the overall system.

[0017] As a further description of the above technical solution:

[0018] The discharge assembly includes a feed inlet, which is fixedly connected to the outside of the fluidized bed, and a wet material outlet is fixedly connected to the outside of the fluidized bed.

[0019] The above technical solution allows the wet material outlet design to discharge the dried wet material in a timely manner, improving the material flowability and processing efficiency, and optimizing the overall production process.

[0020] As a further description of the above technical solution:

[0021] The dust removal assembly includes two device housings, the bottoms of which are fixedly connected to the top of the fixed base. Multiple electrostatic adsorption plates and multiple activated carbon adsorption plates are fixedly connected inside the device housings.

[0022] Through the above technical solutions, the electrostatic adsorption plate improves the capture efficiency of particulate matter, while the activated carbon adsorption plate further purifies the air, ensuring the cleanliness and environmental friendliness of the system and improving overall work efficiency.

[0023] As a further description of the above technical solution:

[0024] The other end of the transmission connecting shaft is rotatably connected to the outside of the fine-pore screening plate. The surface of the fine-pore screening plate has multiple small holes, which are used to screen the material that has been screened through the holes of the coarse-pore screening plate.

[0025] The above technical solution utilizes multiple small holes on the surface of the fine-pore screening plate to further remove fine particles, ensuring precise screening of materials, improving screening effect and material separation accuracy, and increasing overall screening efficiency.

[0026] As a further description of the above technical solution:

[0027] The crushing box is rotatably connected to the outside of the two rotating transmission wheels, and the two rotating transmission wheels are meshed with each other. The inside of the rotating transmission wheels is fixedly connected to the outside of the rotating crushing roller.

[0028] Through the above technical solutions, the transmission system is stable and precise, which enhances the power transmission efficiency of the crushing process, ensures uniform crushing and efficient processing of materials, and improves the overall working efficiency and crushing effect.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, the raw materials are crushed by feeding them into a crushing box and using two rotating crushing rollers. The crushed raw materials are then screened to a suitable particle size by coarse and fine mesh screens. The screened raw materials are then sent to a pulse-type reactor for reaction. By controlling the stirring speed and temperature, the reaction efficiency is improved, and the production cycle is shortened.

[0031] 2. In this utility model, hot air from the bottom is sent in by a heating fan and discharged from the top to the fluidized bed of the cyclone separator. The solid particles are violently washed and tumbled by the hot air flow, which enhances heat and mass transfer, resulting in low drying energy consumption and reduced production costs. The electrostatic adsorption plate and activated carbon adsorption plate treat the dust and waste gas generated during the production process, and the dust emission is ideally controlled, meeting strict environmental protection standards. Attached Figure Description

[0032] Figure 1 This is a perspective view of a low-pollution concrete expansion agent preparation system proposed in this utility model.

[0033] Figure 2 This is a schematic diagram of the fluidized bed structure of a low-pollution concrete expansion agent preparation system proposed in this utility model;

[0034] Figure 3 This is a schematic diagram of the rotating crushing roller structure of a low-pollution concrete expansion agent preparation system proposed in this utility model.

[0035] Figure 4 for Figure 3 Enlarged view of point A.

[0036] Legend:

[0037] 1. Fixed base; 2. Fixed connecting frame; 3. Pre-reaction mechanism; 301. Rotating limit wheel; 302. Fine-mesh sieve plate; 303. Fixed connecting plate; 304. Coarse-mesh sieve plate; 305. Collection box; 306. Sieving assembly; 30601. First motor; 30602. First rotating connecting shaft; 30603. Rotating eccentric wheel; 30604. Transmission connecting shaft; 307. Crushing box; 308. Rotating crushing roller; 309. Drive assembly; 30901. Second... 30902, Second Rotary Connecting Shaft; 30903, Rotary Transmission Wheel; 4, Pulse Reactor; 5, Drying Mechanism; 501, Heating Fan; 502, Transport Pipeline; 503, Heater; 504, Fluidized Bed; 505, Discharge Assembly; 50501, Feed Inlet; 50502, Wet Material Outlet; 506, Cyclone Separator; 507, Dust Removal Assembly; 50701, Device Shell; 50702, Electrostatic Adsorption Plate; 50703, Activated Carbon Adsorption Plate. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a low-pollution concrete expansion agent preparation system, including a fixed base 1. The fixed base 1 is generally rectangular in shape, providing a solid support foundation for the entire preparation system and ensuring that the system will not shake or shift during operation. A fixed connecting frame 2 is fixedly connected to the top of the fixed base 1. The fixed connecting frame 2 has a frame structure, providing a stable installation and support platform for components such as the pre-reaction mechanism 3 and the screening component 306. It also has an internal sliding track structure for cooperating with the rotation limit wheels 301 of the pre-reaction mechanism 3, enabling the pre-reaction mechanism 3 to slide within the fixed connecting frame 2. The pre-reaction mechanism 3 is slidably connected inside the fixed connecting frame 2. The pre-reaction mechanism 3 includes multiple rotation limit wheels 301, which can slide along the length of the fixed connecting frame 2 within the sliding track. The rotating limit wheel 301 is externally slidably connected to the inside of the fixed connecting frame 2. The rotating limit wheel 301 is rotatably connected to a fine-hole screening plate 302 on one side. The surface of the fine-hole screening plate 302 is evenly distributed with multiple small holes for fine screening of materials. Two fixed connecting plates 303 are fixedly connected to both sides of the fine-hole screening plate 302. The fixed connecting plates 303 are rectangular plates and are used to connect the fixed connecting plates 303 and the fine-hole screening plate 302, so that the fixed connecting plates 303 move with the fine-hole screening plate 302. The other end of the fixed connecting plate 303 is fixedly connected to a coarse-hole screening plate 304. The coarse-hole screening plate 304 is rectangular plates and is used for preliminary screening of materials. A collection box 305 is fixedly connected to the top of the fixed base 1 for placing materials that need to be crushed.

[0040] Specifically, the fixed connecting frame 2 is a frame structure that not only provides a stable installation support platform for components such as the pre-reaction mechanism 3, but its internal slide can also cooperate with the rotation limit wheel 301 of the pre-reaction mechanism 3 to realize the sliding of the pre-reaction mechanism 3. The pre-reaction mechanism 3 rolls along the slide by rotating the limit wheel 301. The fine-mesh sieve plate 302 and the coarse-mesh sieve plate 304 can respectively perform fine and preliminary screening of materials to ensure the screening quality of materials. The collection box 305 on the top of the fixed base 1 can hold the materials to be crushed. The entire system is scientifically and rationally designed and can efficiently and stably carry out the preparation of concrete expansion agent.

[0041] A screening assembly 306 is fixedly connected inside the fixed connecting frame 2. The screening assembly 306 includes a first motor 30601. The bottom of the first motor 30601 is fixedly connected inside the fixed connecting frame 2. A first rotating connecting shaft 30602 is fixedly connected to the drive end of the first motor 30601. A rotating eccentric wheel 30603 is fixedly connected to the outside of the first rotating connecting shaft 30602. A transmission connecting shaft 30604 is rotatably connected to the outside of the rotating eccentric wheel 30603. The other end of the transmission connecting shaft 30604 is rotatably connected to the outside of the fine hole screening plate 302. Multiple small holes are opened on the surface of the fine hole screening plate 302 to screen the material screened from the holes of the coarse hole screening plate 304 again.

[0042] Specifically, the rotating eccentric wheel 30603 is connected to the fine-pore sieve plate 302 via the transmission connecting shaft 30604, which can convert the rotational motion of the motor into the specific motion of the fine-pore sieve plate 302. The surface of the fine-pore sieve plate 302 has numerous tiny holes, which can further finely sieve the material after the initial sieve by the coarse-pore sieve plate 304, making the sieve process more efficient and precise, further improving the quality of the raw materials for concrete expansion agent preparation, ensuring better performance of the final product, and meeting the high standard preparation requirements of low-pollution concrete expansion agent.

[0043] A crushing box 307 is fixedly connected to the top of the fixed base 1. The crushing box 307 is rectangular in shape and can withstand the impact force during the crushing process. The outside of the crushing box 307 is rotatably connected to the outside of two rotating transmission wheels 30903. The two rotating transmission wheels 30903 are meshed with each other. The inside of the rotating transmission wheels 30903 is fixedly connected to the outside of rotating crushing rollers 308. Two rotating crushing rollers 308 are rotatably connected inside the crushing box 307. The crushing rollers 308 are cylindrical and parallel to each other, rotating in opposite directions. When the material enters the crushing box 307, it is crushed into smaller particles under the squeezing and friction of the two rotating crushing rollers 308. A drive assembly 309 is fixedly connected inside the fixed base 1. The drive assembly 309 includes a second motor 30901. The second motor 30901 is externally fixedly connected to the inside of the fixed base 1. The drive end of the second motor 30901 is fixedly connected to the second rotating connecting shaft 30902, which is cylindrical. When the second motor 30901 starts, the drive end drives the second rotating connecting shaft 30902 to rotate at high speed, thereby driving the rotating transmission wheel 30903 to rotate, thus driving the rotating crushing roller 308 and completing the crushing work of the material. The rotating transmission wheel 30903 is externally fixedly connected to the second rotating connecting shaft 30902. The rotating transmission wheel 30903 is gear-shaped. One rotating transmission wheel 30903 rotates under the drive of the second motor 30901 and transmits the rotational force to the other rotating transmission wheel 30903 through meshing connection, thereby driving the two rotating crushing rollers 308 to rotate.

[0044] Specifically, the parallel and counter-rotating crushing rollers 308 inside the box crush the material into small particles through compression and friction after it enters. The drive assembly 309 in the fixed base 1 consists of a second motor 30901, etc. After the second motor 30901 is started, its drive end drives the second rotating connecting shaft 30902 to rotate at high speed, which in turn drives the gear-shaped rotating transmission wheel 30903 to rotate. The two meshing rotating transmission wheels 30903 can efficiently transmit the rotational force to drive the two rotating crushing rollers 308, ensuring that the crushing work is stable and efficient, and can quickly crush the material into suitable particle size, providing qualified raw materials for subsequent preparation work and improving the operating efficiency of the entire preparation system.

[0045] Reference Figures 1 to 3A pulse-type reactor 4 is fixedly connected to the top of the fixed base 1. The pulse-type reactor 4 is cylindrical and contains a built-in stirring paddle and temperature control coil to achieve intermittent high-efficiency reaction. A drying mechanism 5 is fixedly connected to the top of the fixed base 1. The drying mechanism 5 includes a heating fan 501, which is rectangular in shape and converts air into hot air, which is then transported to the fluidized bed 504 through a transport pipe 502. The bottom of the heating fan 501 is fixedly connected to the top of the fixed base 1. A transport pipe 502 is fixedly connected to the outside of the heating fan 501. The transport pipe 502 is cylindrical and a heater 503 is fixedly connected to the outside of the transport pipe 502. The heater 503 uses electric heating to heat the air. The other end of the transport pipe 502 is fixedly connected to the fluidized bed 504. 04. The fluidized bed 504 is cylindrical. When the heating fan 501 is working, it draws in and heats the air. The heated air is then transported into the fluidized bed 504 through the transport pipe 502. The hot air in the fluidized bed 504 causes the material to be dried in a fluidized state, improving the drying efficiency. The external of the fluidized bed 504 is fixedly connected to the discharge assembly 505. The discharge assembly 505 includes a feed inlet 50501, which is funnel-shaped and used to transport the material to be dried into the fluidized bed 504. The external of the feed inlet 50501 is fixedly connected to the outside of the fluidized bed 504. The external of the fluidized bed 504 is fixedly connected to a wet material outlet 50502, which is cylindrical and used to discharge the humid air and a small amount of incompletely dried material generated during the drying process.

[0046] Specifically, the drying unit 5 consists of a heating fan 501, a transport pipe 502, a heater 503, a fluidized bed 504, and a discharge assembly 505. The heating fan 501 draws in and heats air, which is then sent to the fluidized bed 504 after being heated through the transport pipe 502 and heater 503. The hot air causes the material to dry rapidly in a fluidized state, improving drying efficiency. The inlet 50501 of the discharge assembly 505 can transport the material to be dried, while the wet material outlet 50502 can discharge humid air and a small amount of incompletely dried material. The reasonable structural design ensures the smooth progress of the drying process, providing qualified raw materials for the preparation of concrete expansion agents and guaranteeing the efficient operation of the preparation system.

[0047] A cyclone separator 506 is fixedly connected to the top of the fixed base 1. The cyclone separator 506 is cylindrical and is used to separate material particles and gas generated during the drying process. Through centrifugal force, the material particles are separated and collected in a collection device at the bottom, reducing material loss and purifying the discharged gas. A dust removal assembly 507 is fixedly connected to the top of the fixed base 1. The dust removal assembly 507 includes two device housings 50701, which are cuboid in shape. The bottoms of the two device housings 50701 are fixedly connected to the top of the fixed base 1. Multiple electrostatic adsorption plates 50702 are fixedly connected inside the device housing 50701. The electrostatic adsorption plates 50702 are rectangular plates. By applying an electrostatic field, they adsorb tiny particulate pollutants in the gas, further purifying the gas. Multiple activated carbon adsorption plates 50703 are fixedly connected inside the device housing 50701. The activated carbon adsorption plates 50703 are used to adsorb organic pollutants and odors in the gas. After dual purification by the electrostatic adsorption plates 50702 and the activated carbon adsorption plates 50703, the discharged gas meets environmental protection standards, reducing pollution to the environment.

[0048] Specifically, the dust removal component 507 consists of two cuboid housings 50701. The internal electrostatic adsorption plate 50702 adsorbs fine particulate pollutants through an electrostatic field, while the activated carbon adsorption plate 50703 adsorbs organic pollutants and odors. Through the dual purification of the electrostatic adsorption plate 50702 and the activated carbon adsorption plate 50703, the exhaust gas can meet environmental protection standards, greatly reducing environmental pollution. It not only effectively recycles and utilizes materials but also ensures that the gas emissions during the preparation process meet environmental protection requirements, achieving the goal of low pollution and demonstrating the environmental advantages and practicality of the preparation system.

[0049] Working principle: First, the raw material to be processed is put into the collection box 305 located on top of the fixed base 1, and then sent into the crushing box 307. Inside the crushing box 307, two rotating crushing rollers 308 crush the raw material. The crushing process is controlled by the drive assembly 309. The second motor 30901 drives the rotating transmission wheel 30903, and under the meshing transmission of the rotating transmission wheel 30903, the other rotating transmission wheel 30903 rotates, thereby driving the two rotating crushing rollers 308 to rotate. The material is crushed into smaller particles under the squeezing and friction of the two rotating crushing rollers 308. The crushed material is sent for screening. The first motor 30601 is started to drive the first The rotating connecting shaft 30602 drives the rotating eccentric wheel 30603, which in turn moves the fine-mesh sieve plate 302 through the transmission connecting shaft 30604. A fixed connecting plate 303 is located at the bottom of the fine-mesh sieve plate 302, allowing the fixed connecting plate 303 to slide on the internal groove of the fixed base 1. The fixed connecting plate 303 transmits the vibration force to the coarse-mesh sieve plate 304, which performs preliminary screening. Then, the fine-mesh sieve plate 302 performs fine screening. The screened material is sent to the pulse-type reactor 4 for reaction. The reactor has a built-in stirring paddle and temperature control coil, which can control the stirring speed and temperature, improve reaction efficiency, and shorten the production cycle.

[0050] The reacted material enters the drying unit 5. Hot air generated by the heating fan 501 is sent into the fluidized bed 504 from the bottom and transported through the transport pipe 502. The heater 503 heats the air. The hot air dries the material in a fluidized state in the fluidized bed 504, improving the drying efficiency. The humid air and incompletely dried material in the fluidized bed 504 are discharged through the wet material outlet 50502. The dried material particles and gas are sent to the cyclone separator 506. Through the action of centrifugal force, the material particles are separated and collected at the bottom to reduce material loss and purify the discharged gas. The gas enters the dust removal component 507 and undergoes dual purification through the electrostatic adsorption plate 50702 and the activated carbon adsorption plate 50703 to adsorb small particles and organic pollutants, ensuring that the discharged gas meets environmental protection standards and reducing the impact on the environment.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-pollution concrete expansion agent preparation system, comprising a fixed base (1), characterized in that: The top of the fixed base (1) is fixedly connected to a fixed connecting frame (2), and the inside of the fixed connecting frame (2) is slidably connected to a pre-reaction mechanism (3). The top of the fixed base (1) is fixedly connected to a pulse-type reactor (4), and the top of the fixed base (1) is fixedly connected to a drying mechanism (5). The pre-reaction mechanism (3) includes multiple rotating limiting wheels (301). The external side of the rotating limiting wheel (301) is slidably connected to the inside of the fixed connecting frame (2). The rotating limiting wheel (301) is rotatably connected to a fine-hole screening plate (302) on one side. Two fixed connecting plates (303) are fixedly connected to both sides of the fine-hole screening plate (302). A coarse-hole screening plate (304) is fixedly connected to the other end of the fixed connecting plate (303). A collection box (305) is fixedly connected to the top of the fixed base (1). A screening assembly (306) is fixedly connected to the inside of the fixed connecting frame (2). A crushing box (307) is fixedly connected to the top of the fixed base (1). Two rotating crushing rollers (308) are rotatably connected to the inside of the crushing box (307). A drive assembly (309) is fixedly connected to the inside of the fixed base (1).

2. The low-pollution concrete expansion agent preparation system according to claim 1, characterized in that: The drying mechanism (5) includes a heating fan (501), the bottom of which is fixedly connected to the top of the fixed base (1). A transport pipe (502) is fixedly connected to the outside of the heating fan (501), a heater (503) is fixedly connected to the outside of the transport pipe (502), a fluidized bed (504) is fixedly connected to the other end of the transport pipe (502), a discharge assembly (505) is fixedly connected to the outside of the fluidized bed (504), a cyclone separator (506) is fixedly connected to the top of the fixed base (1), and a dust removal assembly (507) is fixedly connected to the top of the fixed base (1).

3. The low-pollution concrete expansion agent preparation system according to claim 1, characterized in that: The screening assembly (306) includes a first motor (30601), the bottom of which is fixedly connected inside the fixed connecting frame (2). The drive end of the first motor (30601) is fixedly connected to a first rotating connecting shaft (30602), and a rotating eccentric wheel (30603) is fixedly connected to the outside of the first rotating connecting shaft (30602). A transmission connecting shaft (30604) is rotatably connected to the outside of the rotating eccentric wheel (30603).

4. The low-pollution concrete expansion agent preparation system according to claim 1, characterized in that: The drive assembly (309) includes a second motor (30901), the second motor (30901) is externally fixedly connected to the inside of the fixed base (1), the drive end of the second motor (30901) is fixedly connected to a second rotating connecting shaft (30902), and the external of the second rotating connecting shaft (30902) is fixedly connected to a rotation transmission wheel (30903).

5. The low-pollution concrete expansion agent preparation system according to claim 2, characterized in that: The discharge assembly (505) includes a feed inlet (50501), which is fixedly connected to the outside of the fluidized bed (504), and a wet material outlet (50502) is fixedly connected to the outside of the fluidized bed (504).

6. The low-pollution concrete expansion agent preparation system according to claim 2, characterized in that: The dust removal assembly (507) includes two device housings (50701), the bottoms of the two device housings (50701) are fixedly connected to the top of the fixed base (1), and multiple electrostatic adsorption plates (50702) are fixedly connected inside the device housings (50701) and multiple activated carbon adsorption plates (50703) are fixedly connected inside the device housings (50701).

7. The low-pollution concrete expansion agent preparation system according to claim 3, characterized in that: The other end of the transmission connecting shaft (30604) is rotatably connected to the outside of the fine hole screening plate (302). The surface of the fine hole screening plate (302) has multiple small holes, which will screen the material after it has been screened on the holes of the coarse hole screening plate (304) again.

8. The low-pollution concrete expansion agent preparation system according to claim 4, characterized in that: The crushing box (307) is rotatably connected to the outside of the two rotating transmission wheels (30903), and the two rotating transmission wheels (30903) are meshed with each other. The inside of the rotating transmission wheels (30903) is fixedly connected to the outside of the rotating crushing roller (308).

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