Determining method for two-phase stream diving pump dredging system booster pump station optimal number

Abstract

The invention discloses a method of determining the optimal number of compression stations in a dredging system of two-phase flow submersible pump transporting mud, which is suitable for dredging rivers and lakes and for long-distance sand transportation. The optimal number of compression stations is determined according to the performance parameters of compression station pumps and submersible pumps on the dredging platform after calculating the total lift head Hf required by the dredging system transporting mud with the established mathematical model. The determination basis is as follows: If H0 is larger than or equal to Hf, compression stations are not selected; if H0 is less than Hf which is less than or equal to H0 plus H1, one compression state is selected; if H0 plus H1 is less than Hf, which is less or equal to H0 plus H1 plus H2, two compression states are selected and so on, wherein H0 is the head of the submersible pump with a rotation speed of 980rpm on the dredging platform, H1 is the head of the pump with a rotation speed of 980rpm of compression a station I, and H2 is the head of the pump with a rotation speed of 980rpm of compression a station II. The method with significant economic benefits changes the method of determining the number of compression states based on construction experience and construction practice, which optimizes the dredging system operation, improves the system efficiency and saves energy consumption for sand transportation.

Description

1. Technical field [0001] The invention belongs to the field of water conservancy dredging engineering, in particular to a method for determining the optimum number of pressurization stations in a two-phase flow submersible pump dredging system. 2. Background technology [0002] Due to water and soil erosion, rivers, lakes, and reservoirs in most parts of my country are seriously silted up. In order to ensure flood control safety, it is necessary to regularly dredge rivers, lake beds, or reservoirs. At present, the devices used for dredging rivers and lakes mainly include simple suction dredgers, dredgers, flushing units, two-phase flow submersible pumps, etc. Among them, the use of two-phase flow submersible pumps for hydraulic sand pumping is the most commonly used and fast and effective Methods. A large amount of sediment produced by dredging is often transported to an appropriate location for storage due to site restrictions or environmental protection requirements, and...

AI Technical Summary

Problems solved by technology

[0006] Technical problem: Considering the flow-head relationship of each pump, the type and diameter of the pipeline, as well as the main influencing factors such as sediment particles and transportation distance, through a large number of field tests and theoretical derivation, provide a method to accurately determine the optimal number of pressurization stations Methods

Images