Online chromaticity detection device in naphtha heat exchange process

Abstract

The invention discloses an online chromaticity detection device in a naphtha heat exchange process, which comprises a controller, an analyzer sensor, a main pipeline, a branch pipeline, a regulating valve, a control valve I and a control valve II, the main pipeline and the branch pipeline are of a parallel structure, and a light source emitter and a receiver are arranged in the analyzer sensor. A square medium channel flows between the light source emitter and the receiver through a window body, flanges are arranged at the two ends of the outer side of the medium channel and connected with the branch pipeline, the controller is connected with the receiver of the analyzer sensor, the adjusting valve, the first control valve and the second control valve, and the first control valve and the second control valve are installed at the two ends of the branch pipeline respectively. According to the invention, a double-channel measurement principle is adopted, a bypass type sampling structure is selected, precipitation and filtration are carried out, a window lens is kept at a constant temperature, the response speed is high, and the measurement result is accurate.

Description

technical field [0001] The invention belongs to the technical field of detection equipment, in particular to an on-line chromaticity detection device in a naphtha heat exchange process. Background technique [0002] Naphtha is one of the petroleum products, also known as chemical light oil. It is a light oil that is processed from crude oil or other raw materials and used for chemical raw materials. It is mainly used as a raw material for chemical processes such as catalytic reforming and cracking. During the fractionation process of the atmospheric and vacuum unit, the outlet temperature of the naphtha is relatively high, and it usually exchanges heat with the crude oil to reduce the temperature of the naphtha while realizing the heating of the crude oil. However, due to various reasons, the crude oil will leak. In the naphtha, it will seriously endanger the safe and stable operation of the atmospheric and vacuum devices, and affect the normal production of the enterprise. ...

AI Technical Summary

Problems solved by technology

During the fractionation process of the atmospheric and vacuum unit, the temperature of the naphtha exiting the tower is relatively high, and it usually exchanges heat with the crude oil to lower the temperature of the naphtha while increasing the temperature of the crude oil. However, due to various reasons, the crude oil will leak Into naphtha, it seriously endangers the safe and stable operation of atmospheric and vacuum equipment, and affects the normal production of enterprises. Therefore, it is necessary to monitor in real time whether crude oil has leaked into naphtha. If sampling is used for inspection, the cost of sampling and storage is high. , the result period is long, and it cannot be detected quickly. If online beam detection is used, condensed water will be formed due to temperature differences, or impurities will cause unstable changes in light intensity, resulting in inaccurate measurement results, which need to be improved.

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