Liquid carbon dioxide supplementing and supercharging device

Abstract

The invention provides a liquid carbon dioxide supplementing and supercharging device. The liquid carbon dioxide supplementing and supercharging device comprises a carbon dioxide storage tank, a reciprocating booster pump, a supercharging buffering tank, a foaming agent metering and injecting system and an extruder. The top end and the bottom end of the carbon dioxide storage tank are connected with the reciprocating booster pump through pipelines, the reciprocating booster pump is provided with a hydraulic motor and connected with the supercharging buffering tank through a pipeline, a pressure sensor is arranged at the top end of the supercharging buffering tank, a pressure sensor and a safety valve are arranged on the two sides of the pressure sensor respectively, a heating device is arranged at the bottom end in the supercharging buffering tank, a weighing sensor is arranged in the center of the top end outside the supercharging buffering tank, the supercharging buffering tank is connected with the foaming agent metering and injecting system through a pipeline, the foaming agent metering and injecting system is connected with the extruder through a pipeline, and stop valves are arranged on all the pipelines. The liquid carbon dioxide supplementing and supercharging device has the advantages that the system is stable, and cost is low.

Description

technical field [0001] The invention belongs to the field of supercharging devices, in particular to a liquid carbon dioxide replenishment supercharging device. Background technique [0002] In the existing technology, liquid carbon dioxide enters the pressurized buffer tank from the CO2 storage tank through the reciprocating booster pump. Since there is part of the gaseous carbon dioxide in the pressurized buffer tank, in order to ensure that the liquid carbon dioxide can stably enter the blowing agent metering injection system , The pressure in the pressurized buffer tank must be above 7.1MPa (critical pressure), generally controlled at 8MPa, so that the liquid carbon dioxide in the pressurized buffer tank can be saturated. Pressure gauge, pressure sensor and safety valve are installed on the pressurized buffer tank. When the tank pressure is less than 8MPa, the pressure sensor signal will start the reciprocating booster pump to work through the control circuit. When the t...

AI Technical Summary

Problems solved by technology

At the same time, in order to maintain the tank pressure of 8MPa, the reciprocating booster pump must be started and stopped frequently, which not only affects the service life of electrical components, but also causes large fluctuations in the pressure at the outlet of the booster buffer tank

[0003] Since the temperature of liquid carbon dioxide in the reciprocating booster pump is -20°, the reciprocating booster pump must be started and stopped frequently to ensure the pressure in the booster buffer tank. This working environment has a great impact on the service life of the sealing device of the reciprocating booster pump In addition, the pressure fluctuation of the liquid carbon dioxide at the outlet of the pressurized buffer tank also affects the accuracy of the blowing agent metering injection system

Images