How reaction kettle melt discharge pumps work and their advantageous characteristics
The reaction kettle melt discharge pump is especially suitable for high-temperature, highly viscous polymer melt reaction conveying that requires high output pressure, such as resin, chemical fiber and other industries. The following is a detailed description of its working principle and characteristics:
I. Working principle
The working principle of the reaction kettle melt discharge pump is based on the design of positive displacement pump, which realizes the change of working volume through the precision meshing of the master and slave gears, thus completing the conveyance of the melt. Specifically, when the gears rotate in the specified direction, the melt enters the grooves of the two gears in the feeding area. As the gears rotate, the melt is brought into the feeding zone from both sides. The re-engagement of the gears causes the melt in the grooves to be squeezed out of the discharge area and pressed into the outlet pipe. As long as the pump shaft rotates, the gears press the melt to the outlet side, so that high pressures can be achieved at the pump outlet.
Characteristics
High adaptability: the reactor melt discharge pump can be applied to high temperature (350℃), medium and high pressure (15MPa), high viscosity (20000Pa-s) working conditions to meet specific process requirements.
Stable flow rate: small pressure and flow rate pulsation, can realize nearly linear output of flow rate, easy to control.
Good self-priming performance: it can be applied to the working condition where the inlet is vacuum (-0.05~-0.09MPa), and it can make the high viscosity medium sucked in smoothly under the vacuum condition, and it can complete the conveying and pressurizing of polymer materials.
Precise structure: the pump body is made of various materials, such as stainless steel, alloy steel, corrosion-resistant alloy, etc. The gear material also has a variety of options, such as nitrided steel, tool steel, etc., in order to adapt to different media and working environment. Meanwhile, its sealing structure includes melt dynamic seal + packing seal, high temperature resistant packing seal, etc., to ensure the safe and reliable operation of the pump. In addition, it is also characterized by high precision and long service life.
Wide range of parameters: the viscosity of conveying medium ranges from 1~40000Pa-s (1000~40000000cP), the inlet pressure ranges from vacuum (-0.05~-0.09MPa) to 5.0MPa, the outlet pressure ranges from 0~15MPa, and the operating temperature does not exceed 350℃.
In summary, the reactor melt discharge pump plays an important role in chemical, resin, chemical fiber and other industries with its unique working principle and excellent characteristics.
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