Detailed description

I. Product Overview:
The development of water reducing agent has a long history, from the early lignosulfonate to the β-naphthalenesulfonic acid formaldehyde condensate sodium salt (SNF) and the sulfonated melamine formaldehyde condensate sodium. Salt (SMF) superplasticizer, has developed a new generation of high-efficiency polycarboxylate superplasticizer at home and abroad, which has low admixture, high water reduction, high reinforcement, low alkali, low shrinkage, high moisture retention, The characteristics of green environmental protection are increasingly favored by the market. However, due to the characteristics of the process route, polycarboxylate water reducer has obvious shortcomings, that is, the market is supplied with 22% aqueous solution, and the long-distance transportation cost is high, and it is impossible to supply dry powder mortar which requires powder. There are two reasons for this: First, due to the polymerization process of polycarboxylate superplasticizer, the water content is high, generally between 45% and 78%. It is necessary to make it into a powder, which requires high energy consumption and expensive processing cost. Its deep processing brings great difficulty; secondly, because the molecular weight of the polycarboxylate water reducing agent is relatively small, the softening point of the powder after drying is low, and when the processing temperature is higher than the softening point for a long time, the water reducing agent is caused. The reactive group may undergo side reactions such as imidization, resulting in yellowing of the product appearance and a decrease in dispersibility of the concrete.

Second, the engineering principle: the
special dryer for water reducing agent is heated by the hot air stove to generate high-temperature hot air from the top of the volute passage of the drying chamber. Under the action of the hot air distributor, a uniform rotating airflow is quickly entered into the drying chamber, and the tower is kept inside. The cloth is evenly distributed. The liquid material such as water reducing agent passes through a high-speed rotating atomizer to produce a fine mist mist. The mist is in contact with the swirling hot air, and the water evaporates rapidly. The material is dried in a very short time to obtain a hollow and thin wall. A spherical product that dissolves quickly in water.
In recent years, our company has accumulated rich experience in the drying process of water reducing agents (N, lanthanum, lignin, etc.), and developed a number of technologically advanced equipment for the characteristics of water reducing agents.
In view of the shortcomings of the water-reducing agent drying technology on the market, on the basis of in-depth study of product characteristics, combined with the transformation of the company's centrifugal spray dryer in other fields for heat-sensitive materials, the company finally developed a special spray dryer for water reducing agent. The processing difficulty of the polycarboxylic acid water reducing agent is completely solved, and the processed powder is white, and the powdery fluidity is good. It is completely guaranteed that the powder water reducing agent has good dispersing effect and slump retention ability for cement.

Second, the equipment features:
The centrifugal spray dryer of the company solves the problems of drying of the water reducing agent: 1. The material sticks to the wall; 2. The color turns yellow; 3. The gas sweep fails; 4. The finished material regains moisture.