Variable-diameter connecting tube with flue gas flow guiding device

Abstract

The invention discloses a variable-diameter connecting tube with a flue gas flow guiding device. The flue gas flow guiding device is arranged inside the variable-diameter connecting tube, and structurally comprises a front-end flow stirring plate assembly and a tail-end flow stabilizing plate which are sequentially arranged at two ends of the variable-diameter connecting tube in the flow direction of flue gas, wherein the front-end flow stirring plate assembly has the structure as follows: a plurality of retainer rings are arranged inside the variable-diameter connecting tube; an installing base is arranged inside the innermost retainer ring; turbulence zones are formed between adjacent retainer rings, between the outmost retainer ring and the tube wall of the variable-diameter connectingtube, and between the installing base and the innermost retainer ring respectively; a plurality of flow stirring plates with the same inclining direction are arranged inside ach turbulence zone; the inclining directions of the flow stirring plates in the adjacent turbulence zones are opposite; and the tail-end flow stabilizing plate is a grid-type plate. The variable-diameter connecting tube withthe flue gas flow guiding device has the advantages that high-temperature flue gas has a uniform flow distribution; and the heat efficiency of a flue gas heating device can be effectively improved.

Description

technical field [0001] The invention relates to the boiler field, in particular to a pipe structure between a flue inlet and a boiler high-temperature tail gas discharge outlet in heat exchange equipment heated by waste gas in the boiler field. Background technique [0002] With the vigorous implementation of energy saving and emission reduction policies, the boiler industry is paying more and more attention to the utilization of high-temperature exhaust gas. Usually, waste gas boilers or other waste gas heat exchange devices are installed to improve the overall thermal efficiency of the boiler and reduce energy consumption and carbon emissions. [0003] In actual use, the diameter of the flue inlet pipe on the exhaust gas boiler or other exhaust gas heat exchange devices is different from the outlet pipe diameter of the high-temperature exhaust gas of the boiler, and the two are usually connected by a conical reducing connection pipe. The diameter of the inlet of the tapere...

AI Technical Summary

Problems solved by technology

The diameter of the inlet of the tapered variable-diameter connecting pipe is small, and the caliber of the outlet is large, so that the flue gas flow at the middle position of the outlet of the variable-diameter connecting pipe is concentrated, and the flow at the outside is small and scattered, so the flue gas flow at the outlet of the variable-diameter connecting pipe is uneven. , which will easily lead to uneven heat transfer of the heat exchange surface in the exhaust gas boiler or other exhaust gas heat exchange devices, the decrease of thermal efficiency, and even the deterioration of local heat transfer and other adverse consequences

Images