Optimal design method for cathode protection system of drilling platform ballast water tank

Abstract

The invention discloses an optimal design method for a cathode protection system of a drilling platform ballast water tank. Based on boundary element numerical value analog simulation calculation, the optimal design method comprises the following steps: carrying out geometric modeling to a target platform by computer modeling software, and determining numbering information, space coordinate information and other information of each unit and each node in a boundary element model; loading an anode control module to generate digitalized sacrificial anode information; carrying out numerical value simulation calculation by a boundary element algorithm; judging whether the calculation result conforms to polarization characteristics; and judging whether optimized conditions are satisfied nor not. In the method, numerical value calculation is carried out on the basis of the boundary element algorithm, continuous potential information of the structure surface can be obtained, and when the protection potential of any local structure can not satisfy the requirement, the anode is adjusted and calculated again until all protection potential at any position satisfies the requirement. Thus, the problems of 'adsorption-type shielding effect' and 'dodging-type shielding effect' are perfectly solved, and the service life of the platform is prolonged.

Description

technical field [0001] The invention relates to the anti-corrosion design technology of the ballast water tank of the deep-water semi-submersible drilling platform in the field of ocean engineering, in particular, a sacrificial anode for the ballast water tank of the deep-water semi-submersible drilling platform is optimized in quantity and reasonable in space Optimal design method for ballast water tank cathodic protection system of arranged drilling platform. Background technique [0002] The deep-water semi-submersible drilling platform operates in the open sea all the year round, and the corrosion of the structural steel plate will lead to a decrease in the structural reserve strength and reduce the safety of the operation. At the same time, the platform operates in the open sea, and the cost of docking and maintenance is relatively high. In order to reduce structural corrosion, it is necessary to carry out anti-corrosion design and optimize the platform as a whole. [...

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Problems solved by technology

[0011] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a device that can solve the problem of "absorbing shielding effect" caused by piping systems and related equipment, and the problem of "shielding shielding effect" caused by complex structures, etc. , Establish the life-cycle optimization scheme of the ballast water tank sacrificial anode system, and optimize the design method of the ballast water tank cathodic protection system of the drilling platform to improve the protection efficiency of the ballast water tank sacrificial anode system

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