A non-reflux adjustable conical pulp distributor

Abstract

The invention relates to a headbox in paper making machinery, in particular to a reflux-free and adjustable tapered pulp distributor. The pulp distributor comprises a tapered header pipe, wherein multiple rotationally-adjustable flow blocking rods are transversely and evenly distributed in the tapered header pipe; insides of the flow blocking rods adopt cavity structures, water inlets are formed in top ends of the flow blocking rods, and a plurality of water outlets are formed in side walls; cross sections of the flow blocking rods adopt non-circular structures; the small end of the tapered header pipe adopts a closed structure. With the adoption of the tapered pulp distributor, the problem that when pulp distribution uniformity of existing tapered pulp distributors in the cross direction cannot meet the cross direction basis weight deviation requirement of paper, pulp distribution uniformity in the cross direction cannot realized through local adjustment can be effectively solved, the power consumption of a pulp loading system can be effectively reduced, and the cross direction adjustment accuracy is higher.

Description

technical field [0001] The invention relates to a headbox in a papermaking machine, in particular to an adjustable conical pulp distributor without backflow. Background technique [0002] One of the basic tasks of the headbox is to ensure that the fiber suspension is evenly distributed along the transverse direction of the paper machine, so as to minimize the transverse weight difference of the paper sheet. The pulp distributor is an integral part of the headbox, and its function is to evenly distribute the pulp into the weir pool of the headbox along the transverse direction of the paper machine. [0003] The most commonly used is the tapered slurry distributor, which includes a transition pipe, a tapered main pipe, a slurry distribution resistance element (branch pipe, tube bundle, orifice plate, stepped diffuser, etc.) and a return pipe. [0004] At present, the solution to solve the horizontal uniform distribution of pulp flow by using a conical pulp distributor is: in ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects and deficiencies of the existing technology, the purpose of the present invention is to provide a backflow-free adjustable conical pulp distributor, which can effectively solve the problem that the uniformity of the existing conical pulp distributor cannot satisfy the quantitative difference of the paper sheet. When required, it is impossible to realize the uniform distribution of slurry in the banner through local adjustment. This conical slurry distributor can effectively reduce the power consumption of the sizing system and has a high accuracy of banner adjustment.

Images