Heat absorption tower drum external suspension type molten salt pipeline system and molten salt pipeline suspension method

Abstract

The invention provides a heat absorption tower drum external suspension type molten salt pipeline system and a molten salt pipeline suspension method. The heat absorption tower drum external suspension type molten salt pipeline system comprises a molten salt pipeline, a tower top suspension support structure and a tower body limit support structure, the tower top suspension support structure and the tower body limit support structure are partially overhung and extend out of a tower; a suspension supporting steel beam is arranged on an overhang part of the tower top suspension support structure, and a limiting supporting steel beam is arranged on an overhang part of the tower body limit support structure; the upper portion of the molten salt pipeline is connected with a pipeline suspensionpoint connecting component through a pipeline connecting piece to be then suspended on the suspension supporting steel beam, and the lower portion of the molten salt pipeline is connected with a pipeline limiting point connecting component through a pipeline connecting piece to be then arranged above the limiting supporting steel beam; and a suspension pipeline is mainly pulled and can freely stretch out and draw back in deformation, unbalanced internal force generated by a temperature difference is released, and the wall thickness is obviously reduced compared with that of a bending type in the tower. The stress form of a steel platform component suspended or limited and supported outside the tower can be changed from bending shear torsion to tension or compression, the stress on the section of the component is uniform, and the steel consumption is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of tower-type photothermal power generation, and in particular relates to a molten salt pipeline system and a molten salt pipeline suspension method suspended outside a heat-absorbing tower cylinder. Background technique [0002] In the tower-type molten salt solar thermal power generation system, the heat absorbing tower is its iconic towering structure, and its height is generally more than 200 meters. The heat absorber, as one of the core equipment, is located on the top of the heat absorbing tower. The liquid molten salt at about 290°C is pumped from the cold tank on the ground by a cold molten salt pump, and delivered to the heat absorber through the serpentine cold molten salt pipeline 3 arranged in the heat absorption tower, where it is absorbed by the solar energy It is heated to 565°C, and then enters the hot molten salt tank for storage through the serpentine hot molten salt pipeline in the tower. ...

AI Technical Summary

Problems solved by technology

[0005] 2) There are a large number of steel platforms for maintenance and support at various elbow valves, etc., and they are subject to relatively large pipeline support reactions

[0006] 3) The pipe diameter and wall thickness are large, the construction is complicated, the construction period is long, the quality requirements are high, and the cost is extremely high

[0007] 4) Since the hot and cold salt pipes spiral in the tower, the space inside the tower must be large enough to increase the cost of the heat-absorbing tower

[0008] 5) The height of the heat-absorbing towers of large-scale power stations will become higher and higher, which will lead to more and more difficulties in the design and construction of serpentine molten salt pipelines

For example, the number of support and hanger platforms supporting molten salt pipelines in the tower and the corresponding tower wall embedded parts increase, the design and installation difficulties increase due to the increase in pipe diameter, the cost of pipelines to overcome temperature stress increases, and the demand for space in the tower tube increases. increase etc.

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