Pressure vessel liquid level measuring device

Abstract

The invention belongs to the technical field of chemical production, and particularly relates to a pressure vessel liquid level measuring device which comprises a pressure vessel, a high pressure tapping pipe and a low pressure tapping pipe, and the high pressure tapping pipe and the low pressure tapping pipe are fixedly connected to the pressure vessel at different heights. The output end of thehigh pressure tapping pipe is fixedly connected with a negative pressure chamber flange ball valve; a method of a double-pressure-leading type differential liquid level transmitter is adopted, two source taking measuring points are connected to two different heights of a pressure container, the pressure difference at a source taking point measuring element is converted into the height of a page ofthe pressure container, and pressure signals are transmitted to a diaphragm type pressure transmitter through capillary tubes by flat diaphragm double flanges and connecting diaphragm flanges. Therefore, the height of the liquid level of the pressure vessel can be directly read, and the material level of a medium with corrosivity, high viscosity, easy crystallization and low freezing point characteristics can be measured; the device has the characteristics of high sensitivity and stable signal processing, and can cope with various process conditions.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a pressure vessel liquid level measuring device. Background technique [0002] In daily life, various daily necessities such as plastics, straws, containers, etc. are used. Most of them are directly or indirectly synthesized by chemical products. Petroleum, chemical, pharmaceutical and other chemical products are produced according to certain technological processes and under certain conditions by using corresponding mechanical equipment. With the rapid development of science and the development of industrial production, pressure vessels have been widely used in various industrial fields such as petroleum, chemical industry, medicine, environmental protection, and food. For example, the production of urea requires matching pressure vessels such as synthesis towers, heat exchangers, separators, reactors, and storage tanks; the processing of crude oil requ...

AI Technical Summary

Problems solved by technology

This variety of operating characteristics has caused complexity for pressure vessels from material selection, manufacturing, inspection, use, maintenance, and management. Therefore, it has caused certain difficulties in the measurement of operating parameters during pressure vessel production.

[0004] The control of the liquid level of the pressure vessel is one of the important parameters in the chemical production process, such as the control of the liquid level of the tower bottom in the absorption tower or the rectification tower. When the liquid level is too high, it will cause the liquid phase to flood on the tray. In severe cases, there may even be operational accidents such as tower flooding

If the liquid level is too low, it will cause dry plate phenomenon on the tray, which will seriously affect the efficiency of unit operation

further affect the quality of the product

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