Liquid level measuring device

Abstract

The invention discloses a liquid level measuring device. The liquid level measuring device comprises a plurality of liquid level transmitters and differential pressure transmitters which are connected with an upright synthesis gas cooler, wherein an upper liquid level interface of each liquid level transmitter connected with the synthesis gas cooler is equal in height; a lower liquid level interface of each liquid level transmitter connected with the synthesis gas cooler is equal in height; an upper differential pressure interface of each differential pressure transmitter connected with the synthesis gas cooler is equal in height; a lower differential pressure interface of each differential pressure transmitter connected with the synthesis gas cooler is equal in height; upper liquid level interfaces are arranged above a liquid level inside the synthesis gas cooler; and lower liquid level interfaces, upper differential pressure interfaces and lower differential pressure interfaces are arranged under the liquid level inside the synthesis gas cooler. As the upper and lower interferences of the differential pressure transmitters are all arranged under the liquid level, when water and steam inside the synthesis gas cooler achieve balanced, density of the water can be calculated through the measuring device no matter the water is saturated water, saturated steam or unsaturated water or unsaturated steam.

Description

technical field [0001] The invention relates to a device for measuring the liquid level of a syngas cooler. Background technique [0002] In the chemical industry, by measuring the liquid level of the syngas cooler to protect the heating process of the gasifier reactor, maintain the normal working state of the gasifier reactor, and maintain the normal operation and safety of the gasification device. Accurately measuring the liquid level of the syngas cooler is very important to the safety of the gasifier reactor. Under normal operating conditions, the pressure of the syngas cooler is 12.3-13.5MpaG, and the water temperature is as high as 327°C-350°C. Since the temperature and pressure fluctuate, the density of the water will fluctuate accordingly, which will cause liquid level measurement. Inaccurate. Therefore, how to measure the density of water in a long-term, stable and accurate manner under this temperature and pressure is the main problem to be solved. [0003] At p...

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Problems solved by technology

[0004] The above-mentioned measurement device has the following disadvantages: 1. The density of the medium in the double-chamber balance container can only be close to the density of the medium in the steam drum. When the insulation of the double-chamber balance container is not ideal, the measurement error will be large; 2. The double-chamber balance The length of the container is generally less than 2000mm. The error of the double-chamber balance container exceeding 2000mm is large, the weight is heavy, the installation is difficult, and it is basically not used; 3. It can only measure the liquid level of saturated water and saturated steam. When the medium is unsaturated For water and unsaturated steam, the corresponding density of the medium cannot be converted by measuring the pressure

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