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Polycarboxylate water reducer high shear disperser
Polycarboxylic acid water reducer high shear disperser is mainly used for the production of micro lotion and ultra-fine suspension lotion. Since three
Product details
Polycarboxylate water reducer high shear disperser
Polycarboxylate high-performance water reducer high-speed disperser, polycarboxylate high-performance water reducer synthesis process, polycarboxylate high-performance water reducer is currently a cutting-edge concrete superplasticizer (water reducer) with high technological content, good application prospects, and excellent comprehensive performance in the world. Polycarboxylate based high-performance water reducer is a composite product of carboxylic acid grafted copolymers and other effective additives.
After decades of development, concrete water reducers can be basically divided into three generations of products, namely, the second-generation concrete water reducers represented by lignosulfonates, the second-generation concrete water reducers represented by fatty acids, and the third-generation concrete water reducers represented by polycarboxylates. From the current market situation, the third-generation water reducing agent has excellent performance and long-term durability; Strong resistance to chemical corrosion and can be used in various special projects; It has excellent construction performance such as high water reduction rate and high strength, as well as excellent workability, easy transportation, and easy compaction. However, in the process of use, such water reducers often encounter difficulties in conveying and rapid loss of concrete slump and hardening. The commonly used method to control slump loss is to rely on the addition of retarders, but the addition of retarders can affect the early strength development of concrete, which is very unfavorable in many situations.
Craftsmanship
1) Mix raw materials b, c, and g with water and stir evenly to make drip additive A, with a concentration of 15-30%;
2) Add water to raw material d to make dropwise addition B, with a concentration of 20-30 wt% for dropwise addition B;
3) Mix raw materials e and f with water and stir evenly to make dropwise addition C, with a concentration of 20-30 wt%;
4) Add raw material a into a reaction vessel containing water, stir and mix evenly, and completely dissolve to prepare a solution with a concentration of 15-40 wt%;
5) Raise the temperature of the reaction vessel and start uniformly adding the prepared dropwise additives A, B, and C to the reaction vessel at the same time. Control the drip rate so that drip additive A can be added within 2-3 hours, drip additive B can be added within 0.5-1 hour, and drip additive C can be added within 2-3 hours. After all drip additives are added, maintain the temperature for 1-2 hours to complete the reaction.
Polycarboxylate high-performance water reducer high-speed disperser, polycarboxylate high-performance water reducer synthesis process, polycarboxylate high-performance water reducer
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A high shear homogenizer is a device that efficiently, quickly, and uniformly transfers one or more solid phases into another immiscible continuous phase (usually liquid). When the fineness of one or more materials reaches the micrometer or even nanometer level, the system can be considered homogeneous. When external energy is input, the two materials recombine into a homogeneous phase. The high shear homogenizer, due to the high tangential velocity generated by the high-speed rotation of the rotor and the strong kinetic energy brought by high-frequency mechanical effects, subjects the material to strong mechanical and hydraulic shear, centrifugal extrusion, liquid layer friction, impact tearing, and turbulence in the narrow gap between the stator and rotor, forming a suspension. The high shear disperser enables immiscible solid, liquid, and gas phases to be instantly uniformly and finely dispersed and homogenized under the combined action of corresponding processes and appropriate additives. Through the cyclic operation of the high-frequency pipeline high shear disperser, stable high-quality products are finally obtained. The factors that affect the dispersion results are as follows The three-stage high shear dispersion machine is mainly used for the production of micro lotion and ultra-fine suspension lotion. Since three groups of dispersion heads (stator+rotor) in the working chamber work at the same time, after high shearing, the lotion drops are more delicate and the particle size distribution is narrower, so the stability of the generated mixed liquid is better. The three sets of dispersing heads are easy to replace and suitable for different process applications. The different models of machines in this series have the same line speed and shear rate, making it very easy to scale up production. It also meets the CIP/SIP cleaning standards and is suitable for food and pharmaceutical production. High rotational speed and shear rate are important for obtaining ultrafine suspension lotion. According to some industry specific requirements, its shear rate can exceed 15000rpm, and the rotor speed can reach 44m/s. Within this speed range, turbulence caused by shear forces combined with specially developed motors can reduce the particle size range to the nanometer level. The shear force is stronger, and the particle size distribution of lotion is narrower. The following is a model table for reference:
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Polycarboxylate water reducer high shear disperser
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