Working condition optimization method and gas volume adjustment control system of natural gas gathering booster

Abstract

The invention discloses a working condition optimization method for a natural gas gathering supercharger, and a gas volume adjustment control system applied to the same. According to the method, the gas volume adjustment control system is arranged on a cylinder head of the supercharger, and provided with a clearance adjustment unit and a rotational speed adjustment unit; the current inlet pressure value of the supercharger is judged through the gas volume adjustment control system; running rotational speed adjustment of the supercharger is coarse adjustment, and stepped adjustment is realized through the rotational speed adjustment unit; and clearance adjustment of the supercharger is fine adjustment, and continuous stepless adjustment in a range of 60-100% is realized through a clearance piston. The gas volume adjustment control system comprises an execution mechanism, a hydraulic oil station and an electric control cabinet, wherein the execution mechanism comprises a clearance cylinder, the clearance piston, a hydraulic cylinder and a displacement sensor; the electric control cabinet comprises a PLC module, a servo drive unit, a signal acquisition unit, a rotational speed adjustment unit and a touch screen. According to the invention, real-time automatic control for the variable working conditions of the gas gathering supercharger is realized, thus the adjustment workload of employees in the field is greatly reduced.

Description

technical field [0001] The invention relates to a method for optimizing working conditions of a natural gas gas-gathering supercharger and a gas volume adjustment control system applied thereto, which realizes automatic control of stepless gas volume adjustment of a natural gas gas-gathering supercharger with a relatively large gas volume adjustment range. Background technique [0002] Natural gas gas collecting booster is a kind of gas collecting and boosting equipment, which is widely used in natural gas fields and is one of the essential key equipment for the national economy. At present, during the production and operation of many domestic gas fields, natural gas production in some areas is seriously declining, and the inlet pressure of the first stage of the supercharger decreases, resulting in an increase in the compression ratio of the supercharger, which will cause the exhaust temperature of the supercharger unit to increase, and the moving parts Increased wear and r...

AI Technical Summary

Problems solved by technology

Its disadvantages are that the adjustment range of the exhaust volume is not large (less than 50,000 cubic meters), the state of the engine is unstable when the engine is running at low speed for a long time, and the speed of the moving parts (intake and exhaust valves) is reduced, the wear is intensified, and the vibration is relatively increased

Its disadvantage is that under the condition of the same fuel gas consumption, the operation efficiency of the supercharger is poor, and the high-temperature gas after supercharging enters the compression cylinder again, and the temperature in the cylinder is high, which is easy to aggravate the loss of accessories such as air valves.

[0006] Increase the clearance value of the fixed clearance device, reduce the volumetric efficiency, and reduce the displacement of the supercharger, which can reduce the load rate of the supercharger and effectively prevent the unit from being overloaded. The disadvantage is that the volume of the original clearance chamber of the unit is small. The adjustment range of the exhaust volume is small, each adjustment needs to be stopped for operation, and the non-continuous adjustment increases the adjustment workload of the staff

In addition, there may be safety risks due to improper operation by personnel

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