Diagnosis system for enhancing nitrogen sealing performance of PDH special valve

Abstract

The invention aims at providing a diagnosis system for enhancing the nitrogen sealing performance of a PDH special valve. The system comprises large reactor valves and loose joint stand columns. A plurality of groups of large reaction valves are set and are respectively and fixedly arranged on different support rods; and a plurality of the loose joint stand columns are arranged. Each loose joint stand column is provided with a remote pressure instrument. The large reactor valves are combined with pressure acquisition points and a dial plate mounting instrument to form a sealing diagnosis system for improving the nitrogen sealing performance; the output terminals of the pressure acquisition points are connected with acquisition input points of the large reactor valves in a contact manner; the output terminals of the large reactor valves are connected with input terminals of pressure leading points; the output terminals of the pressure leading points are directly connected with the inputterminals of the dial plate mounting instrument With a T-shaped three-way valve and multi-point air pressure acquisition, the pressure acquisition precision can be effectively improved, the air tightness can be effectively diagnosed and analyzed, and the effective prevention of position risks can be effectively realized and improved.

Description

technical field [0001] The invention relates to the field of nitrogen gas tightness diagnosis, and mainly relates to a diagnostic system for adding nitrogen gas tightness to a PDH special valve. Background technique [0002] With the rapid progress and development of our country's society, the current requirements for the exhaust gas are relatively strict, especially for the discharge requirements of nitrogen gas. Nitrogen seal pressure travel monitoring, and by monitoring the nitrogen seal-pressure, to judge the working status of the valve, however, there are many disadvantages and problems in the existing scheme, including the real-time monitoring of the nitrogen pressure of the large valve, the inability to record the data in real time and In the actual monitoring and diagnosis, a large number of acquisition breakpoints and incomplete records often occur, resulting in distorted diagnosis, which affects the air tightness monitoring to a large extent, and the operating stat...

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Problems solved by technology

[0002] With the rapid progress and development of our country's society, the current requirements for the exhaust gas are relatively strict, especially for the discharge requirements of nitrogen gas. Nitrogen seal pressure travel monitoring, and by monitoring the nitrogen seal-pressure, to judge the working status of the valve, however, there are many disadvantages and problems in the existing scheme, including the real-time monitoring of the nitrogen pressure of the large valve, the inability to record the data in real time and In the actual monitoring and diagnosis, a large number of acquisition breakpoints and incomplete records often occur, resulting in distorted diagnosis, which affects the air tightness monitoring to a large extent, and the operating state of the large valve is not stable enough, and the basis for judgment is insufficient, making it difficult to collect data for timely monitoring and diagnosis

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