Rear wall shape designing method for square-cone pulp distribution header of pulp flow tank

Abstract

The invention relates to a rear wall shape designing method for a square-cone pulp distribution header of a pulp flow tank. The method comprises the steps of: (a) carrying out geometric modeling and mesh partitioning on a square-cone pipe pulp distributor by adopting GAMBIT software, setting a boundary type and generating header.msh files; (b) importing the header.msh files into FLUENT software, checking the quality of meshes, setting a flowing model, a medium and boundary conditions, carrying out automatic solving and result post-processing, and outputting calculation results; (c) resolving the calculation results by adopting iSIGHT software; according to calculation results obtained in the step (c), if the pulp distributing quality / flow deviation of branch bundles is lower than 1%, obtaining results meeting design goals; and otherwise, adjusting the design parameter for the height hi(x) of the rear wall of the square-cone pulp distribution header, and repeating the steps (a), (b) and (c) until the results meeting the design goals are obtained. According to the method, structure optimizing design is carried out by adopting data integration and process integration technologies, so that the pulp distribution is more uniform.

Description

[0001] technical field [0002] The invention relates to a design method for a headbox of a high-speed paper machine, in particular to a design method for the shape of the rear wall of a square cone main pipe of a hydraulic headbox. Background technique [0003] The hydraulic headbox is the core part of the modern high-speed paper machine, and the square cone tube pulp distributor is one of the key components of the hydraulic headbox, and its function is to distribute the pulp evenly along the width. Whether the slurry distribution of the square conical tube slurry distributor is uniform mainly depends on the structure of the main pipe. The initial design method is a simplified design method, which does not consider the flow loss of the slurry flow in the main pipe, and is only established based on the geometrically similar proportional relationship. Therefore, the pulp flow in the main pipe is not equal-pressure flow, and the pulp flow cannot be evenly distributed along th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for designing the shape of the rear wall of the headbox square cone slurry distribution main pipe, to search for a reasonable structure of the slurry distribution main pipe, to overcome the uneven distribution of slurry in the existing square cone main pipe slurry distribution device, and to make the slurry distribution more efficient. uniform

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