Optimum Design Method of Riser Tube Spacing

Abstract

The invention provides a design method of a steam boiler. The steam boiler comprises an upper boiler cylinder, a lower boiler cylinder, lifting pipes and falling pipes, wherein the lifting pipes and the falling pipes are connected between the upper boiler cylinder and the lower boiler cylinder. The design method comprises the steps that with the increase of the lifting pipe diameter, the lifting pipe spacing increases continuously. The change of a law is obtained by a large number of numerical simulation and experiments, and through the changes of the law, the heat transfer effect can be further improved.

Description

technical field [0001] The present invention is a project commissioned by colleges and universities to carry out research and development. The invention belongs to the field of steam generation, in particular to a steam boiler, and belongs to the field of IPC classification number F22. Background technique [0002] The circuit that receives heat from the furnace and makes the fluid flow from a low level to a high level is called an "ascending loop", while the circuit that receives heat and makes a fluid flow from a high level to a low level is called a "falling loop". A circuit consists of a pipe or a group of pipes leading from a common point, such as a header or steam drum, and terminating at a common point, also a header or drum. [0003] In most natural circulation boiler designs, the heated tubes making up the evaporating section generally provide upward flow, but in multi-drum boilers, the descending heated tubes of the evaporator bundle do not. In this type of boile...

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Problems solved by technology

[0008] In view of the above problems, the present invention improves on the basis of the previous invention, and provides a new steam boiler and its design method, thereby solving the problem of low heat absorption efficiency of the rising tube

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