Oil and gas separation recovery device for natural gas turbine expander and starting method thereof

By installing valves and humidity sensors on the return oil pipe to monitor the gas humidity difference and liquid volume change rate, and controlling the valve opening, the problem of oil mist backflow is solved, and the effective separation and recovery of lubricating oil is achieved, ensuring the stable operation of the filter and the efficiency of the equipment.

CN122183276APending Publication Date: 2026-06-12SICHUAN CHUANKONG HEAT EXCHANGER CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN CHUANKONG HEAT EXCHANGER CO LTD
Filing Date
2026-03-13
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing technologies, oil mist gas from pressurized oil tanks may flow into the filter through the filter return pipe under pressure, causing the filter to fail and become unable to effectively separate lubricating oil and natural gas, resulting in equipment contamination and reduced efficiency.

⚗Method used

A first valve, a liquid flow monitoring device, and a second valve are installed on the return oil pipe, along with a humidity sensor. By monitoring the gas humidity difference and the liquid volume change rate, the valves are controlled to open and close, ensuring the effective operation of the filter.

🎯Benefits of technology

It effectively prevents oil mist gas from flowing back into the filter, ensuring the filter's separation efficiency and stable operation, enabling the recycling of lubricating oil, and avoiding equipment contamination and efficiency reduction.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122183276A_ABST
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Abstract

The present application relates to oil and gas separation technical field, specifically for a kind of oil and gas separation recovery device and its starting method for natural gas turbine expander;The device aims at solving the problem that oil mist gas in pressure tank under the action of pressure flows into filter through oil return pipe in reverse, leading to failure;Device includes turbine expander, pressure tank, connecting pipe, filter and oil return pipe, first valve, liquid flow monitoring element and second valve are sequentially arranged on oil return pipe, form the oil return path that can be blocked;When starting, first valve and second valve are closed first, by monitoring the difference of gas humidity before and after filtering and the liquid volume change rate, gradually open valve after system stabilizes, realize safe and controllable start and oil return;The device can effectively separate and recover natural gas in pressure tank, and prevent lubricating oil from entering the pressurized end of natural gas turbine expander, with higher reliability and economy.
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