The Superstar for Transporting High-Temperature, High-Viscosity Melts: Reactor Kettle Discharge Pump

In the field of transporting high-temperature, high-viscosity polymer melts, the Reactor Kettle Discharge Pump (often referred to as a high-temperature melt pump or polymer melt gear pump) plays a crucial role. Designed specifically for handling high-temperature, high-viscosity polymer melts, this pump can efficiently and stably perform tasks such as melt transportation, pressurization, and metering, making it an ideal choice for industries such as plastics, resins, rubber, and chemical fibers.

Working Principle of the Reactor Kettle Discharge Pump

The Reactor Kettle Discharge Pump is a positive displacement transport device that relies on the change in working volume caused by the intermeshing of the driving and driven gears to transport the melt. The specific process is as follows:

Inlet Stage: When the gears rotate, the melt enters the feed zone and fills the tooth spaces of the two intermeshing gears.

Transportation Stage: As the gears continue to rotate, the melt is drawn into the transportation zone from both sides of the tooth spaces.

Discharge Stage: When the gears mesh again, the melt in the tooth spaces is squeezed out of the discharge zone and pressed into the outlet pipe. Due to the continuous rotation of the pump shaft, the melt is continuously pressed from the inlet side to the outlet side, forming a stable melt flow. This positive displacement working principle ensures that the pump's flow rate is strictly proportional to its rotational speed, and it has low requirements for inlet flow rate and pressure, even allowing for vacuum suction at the inlet.

Characteristics of the Reactor Kettle Discharge Pump

Efficient Transportation: The Reactor Kettle Discharge Pump has high transportation efficiency and can handle polymer melts with high temperatures (up to over 400°C) and high viscosities (up to 40,000 Pas).

Stable Pressure: The pump can generate a certain pressure during transportation and maintain stable pressure of the melt material throughout the process, effectively preventing material fluctuations or backflow.

Precise Metering: By precisely controlling the pump's rotational speed, accurate metering of the transported melt volume can be achieved, which is particularly important for production processes that require precise control of material usage.

Long Lifespan: The pump has a precision structure and is manufactured using high-quality materials, exhibiting good wear resistance and corrosion resistance for a long service life.

Excellent Self-Priming Performance: Some models have excellent self-priming performance, making them suitable for transporting and pressurizing polymer materials under vacuum reaction conditions.

Applications of the Reactor Kettle Discharge Pump

The Reactor Kettle Discharge Pump is widely used in the extrusion molding processes of plastic, resin, rubber, and chemical fiber products, such as pelletizing, film production, pipe manufacturing, sheet production, sheet extrusion, artificial fiber production, optical fiber production, and medical plastic tubing, among others. It also plays an irreplaceable role in the production of polymers such as polyester, polycarbonate, and polyurethane.

Example of Technical Parameters

Taking a certain model of high-temperature melt pump as an example, its technical parameters are as follows:

Viscosity Range: 500-40,000 Pas (500,000-40,000,000 cP)

Inlet Pressure: Vacuum (-0.05 to -0.09 MPa) to 10 MPa

Outlet Pressure: 0-15 MPa

Maximum Pressure Differential: 15 MPa

Temperature Range: ≤350°C

Installation and Usage Precautions

Pre-installation Inspection: Carefully inspect the pump's appearance and internal structure before installation to ensure there is no damage or foreign matter.

Alignment: Ensure the concentricity between the pump base and the motor drive shaft during installation to avoid vibration and noise caused by misalignment.

Preheating and Startup: Preheat the pump before startup to avoid damage from cold starting. Start at a low speed and gradually increase the rotational speed after all components are fully lubricated.

Regular Inspection: Regularly inspect the pump's operating status during use, such as temperature, pressure, flow rate, and other parameters, to promptly identify and address any abnormalities.

Maintenance: Regularly maintain the pump, such as replacing seals and cleaning the gears, to extend its service life.

The Reactor Kettle Discharge Pump, with its characteristics of efficient transportation, stable pressure, precise metering, long lifespan, and excellent self-priming performance, plays a crucial role in the field of transporting high-temperature, high-viscosity polymer melts. It is an indispensable piece of equipment in industries such as plastics, resins, rubber, and chemical fibers, providing strong support for modern industrial production.

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