The polymerization reactor is the main equipment for the preparation of polymer compounds. It is generally a vertical cylindrical autoclave with a jacket to allow steam or cold water to be introduced for heating or cooling.
For emulsion polymerization, the horizontal paddle agitator with stainless steel inside is driven by an electric motor through a transmission device and a reducer. The outer wall of the kettle is often made of carbon steel, lined with stainless steel, and also lined with enamel. During polymerization, it can be produced intermittently in a single kettle, or it can be produced in series in multiple kettles. The polymerization reactant enters the upper part of the next kettle from the lower part of one kettle. The kettle is equipped with temperature, pressure and other instruments, as well as inlet and outlet ports. If it is used for bulk polymerization, there is no stirrer in the kettle, and it is not connected in series.
The polymerization kettle is generally composed of a kettle body, a kettle cover, a jacket, a stirrer, a transmission device, a shaft sealing device, a support, etc. Due to the different production processes and operating conditions of users, the stirring types in the polymerization kettle generally include anchor type, slurry type, turbine type, push type or frame type. When the mixing device is relatively large in height and diameter, it can be equipped with multi-layer stirring paddles, or it can be arbitrarily selected according to the user's requirements. And set a jacket outside the kettle wall, or set a heat exchange surface in the vessel, and also through the external circulation for heat exchange. The heating methods include electric heating, hot water heating, heat conduction oil circulation heating, far-infrared heating, external (internal) coil heating, etc., and the cooling methods are jacket cooling and kettle coil cooling. There are two kinds of support seats: hanging or supporting. Gear reducer should be used for speeds of more than 160 rpm. The number of holes, specifications or other requirements can be designed and made according to user requirements.
The reaction products of the polymerization kettle are cleaned, filtered, dried and other processes to obtain the finished product, which has the advantages of short reaction time, high powder purity, low energy consumption, the amount of hollow carbon balls contained in the product exceeds 90%, fire resistance, wear resistance, good chemical stability, and easy to achieve large-scale preparation. Due to the above-mentioned process, this product has advantages that general reactors do not have. The polymerization kettle is able to increase the polymer content of polydextrose products to more than 90%. The reducing sugar content has been reduced, generally less than 4%. The acidity and pH are low, with an acidity of 002, the pH value reaches 5.
Next, we will introduce the use of the Jutai kettle:
1. The polymerization kettle should be placed indoors. When equipping multiple autoclaves, they should be placed separately. Each operating room should have an exit directly to the outside or passage, and the equipment site should be well ventilated.
2. When installing the kettle lid, the sealing surfaces between the kettle lids should be prevented from bumping each other. The lid of the kettle is carefully placed on the body of the kettle in a fixed position, and when the main nut is tightened, it must be tightened diagonally and symmetrically in several times. The force should be even, and the lid of the kettle should not be tilted to one side to achieve a good sealing effect.
3. At the junction of the positive and negative nuts, only the positive and negative nuts are allowed to be rotated, and the sealing surfaces of the two arcs shall not be rotated relatively.
4. The needle pattern tether seal, only need to gently rotate the valve pin and press the cover tightly to achieve a good sealing effect.
5. Use the hand disc to move the rotating body to check whether the operation is flexible.
6. The controller should be placed flat on the operating table, its working environment temperature is 10-40, the relative humidity is less than 85%, and the surrounding medium does not contain conductive dust and corrosive gas.
7. Check whether the movable parts and fixed contacts on the panel and rear plate are normal, pull open the upper cover, check whether the contact of the connector is loose, and whether there is damage or rust caused by poor transportation and storage.
8. The controller should be reliably grounded.