The Full set production line equipmentand process of the SAP

1. SAP production line flow

   The whole process flow includes several stage, many of them are hard to operate. To produce high quality products in a complete pipeline way, strict control in every step during the process is needed.

   The process flow involves: equipment of the raw material,gel polymerization ,gel broken,drying,surface treatment,second drying,screening,product packing.

2.Description to the equipment

(1)   Equipment of the material(preparation process)

The equipment which the process involves:Acrylic acid storage tank diluted ,NAOH Configuration kettle,Acid &alkali neutralization kettle.

During the process of the material configuration and acid-base neutralization, we must make sure that the enough cooling to the material and control the material temperature strictly.

(2)   Gel polymerization

This process is one of the key step to produce the SAP, by many years’ research and practice, it has achieve the high automatic and production, high quality and uniform in products.

(3) Slitting,Granulating

The development of this process is for drying. Due to the material shape is massive after the gel polymerization, and it is hard to dry directly. We choose to slit the material into stick, then by squeezing and granulating to make the material granulous.

(4)   Drying

    After SAP wet colloid granulating, the drying method can adopt the box-type,Continuous belt,rotary kiln,XIR extreme infrared,microwave and so on. As the drying time and temperature are the important factors to affect the molecular weight, box-type drying need specialized colloidal particle container, it’s not applied to the continuous produce and the drying process is from outside into the inside, the surface turned into harder, the inner moisture isn’t easy to evaporate, the drying speed and production efficiency is low, using the fuel such as coal may result in environment problems such as the flue gas emission. While the heating efficiency of electricity drying is low and the floor space of the rotary kiln is big, it needs the fuel such as coal may also bring about the environment pollution problems such as flue gas emission. As the SAP colloidal particle has stickiness, it’s not suitable to adopt this way of drying. The infrared ray and microwave are the advanced method of drying. Microwave drying has fast drying speed, but it may existing some problems such as the temperature is hard to control, the product functions is destroyed, the shape of drying material needs uniformity, investment and maintenance cost is high. 

 (5) Crushing

This process plays a key role in whole production line. Owing to the high standard to the product granularity, the finished product became the key factor. In the previous crushing, the rate of finished product is only about 60% and result in the waste. By many years’ practice and research, our company improved in the crushing equipment and by a large margin to improve the yield. So far, the rate can mainly reach above90%.

(6) Surface treatment (mixer)

This process is also a necessary part in whole process. It needs the formula (liquid form) mixed with the crushed granule evenly. We adopt the way of mixing, meanwhile the formula spray into the material and stirring fully.

(7) Drying after surface treatment

After surface treatment, we dried the material. Adopt the most common drying oven can do it.

(8) Sifting (vibration screen)

   Civil case of SAPchild diaper30-40x, women sanitary articles60x.

(9) Assorting packing