Method for realizing feeding at any liquid level

Abstract

The invention relates to a method for realizing feeding at any liquid level, and provides a liquid level feeding detection device. The liquid level feeding detection device comprises a material injection container, a water pump, a pressure sensor and a controller; the calculation formula of the controller is that P=rhog h, wherein P is liquid pressure, rho is liquid material density, g is a gravity constant, and h is liquid level height; before a liquid material to be injected is added into the material injection container, the density rho of the liquid material to be injected is measured; in the feeding process, the controller continuously monitors the pressure value P fed back by the pressure sensor; when the pressure value P fed back by the pressure sensor is larger than or equal to the pressure P under the corresponding liquid level h, the controller sends out a signal to shut down the water pump, and otherwise, the water pump continuously feeds materials into the material injection container. The method for realizing feeding at any liquid level is reliable in principle, convenient to set, simple and convenient to install, suitable for various reaction containers and capable of continuously and randomly controlling the liquid level.

Description

technical field [0001] The invention belongs to the technical field of liquid level detection and control, in particular to a method for realizing arbitrary liquid level feeding. Background technique [0002] At present, it is often necessary to control the liquid level when injecting liquid in industrial production. Most of them adopt the method of floating ball. The float sensor is a switch of magnetic principle. In the liquid, the float floats up and the magnetic switch is closed. Through this principle, the liquid level control is realized. [0003] However, the float sensor can only be controlled at a fixed point, and the controlled liquid level depends on the installation position of the float switch. Other positions need to be installed with other float switches to achieve, and the installation is complicated. For large reactors, the installation is complicated and needs to be arranged The wire of the float switch is very long, and the reliability and anti-corrosion ...

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Problems solved by technology

[0003] However, the float sensor can only be controlled at a fixed point, and the controlled liquid level depends on the installation position of the float switch. Other positions need to be installed with other float switches to achieve, and the installation is complicated. For large reactors, the installation is complicated and needs to be arranged The wire of the float switch is very long, and the reliability and anti-corrosion treatment must also be considered. The engineering volume is large, and the float switch has requirements for the density of the liquid. If the liquid density is too small to float the float, it is not applicable.

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