Steam boiler with through hole diameters being changeable

Abstract

The invention provides a steam boiler. The steam boiler comprises an upper boiler barrel, a lower boiler barrel, ascending pipes and descending pipes, wherein the ascending pipes and the descending pipes are arranged between the upper boiler barrel and the lower boiler barrel; the ascending pipes are internally provided with flow stabilizing devices, the same ascending pipe is internally provided with a plurality of the flow stabilizing devices, and the diameters of through holes of the flow stabilizing devices are smaller and smaller in the fluid flowing direction of the ascending pipes. The steam boiler is provided with the flow stabilizing devices of novel structures, and through the change of the diameters of the through holes, when gas-liquid two-phase flowing exists in the ascending pipes, heat transfer is strengthened; and meanwhile, vibration of the ascending pipes is weakened, and the noise level is lowered.

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...

AI Technical Summary

Problems solved by technology

However, it was found during the operation of this device that the space A formed between the three pipes is relatively small because the pipes are tightly combined, because the space A is formed by the convex arc of the three pipes, so most of the space A Narrowness will make it difficult for the fluid to enter and pass through, resulting in a short circuit of the fluid, which affects the heat transfer of the fluid and cannot play a good role in stabilizing the flow

Simultaneously because the many tubes of above-mentioned structure are combined together, manufacture difficulty

[0007] In view of the above problems, the present invention improves on the basis of the previous invention, and provides a new steam boiler, thereby solving the problem of low heat absorption efficiency of the rising tube

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