Boiler air bin air distributing device with built-in flow stabilization and flow shunting and guide functions

Abstract

The invention belongs to the field of energy source utilization, and aiming at chain grate stoker grate firing boilers, relates to a boiler air bin air distributing device with built-in flow stabilization and flow shunting and guide functions. The boiler air bin air distributing device with the built-in flow stabilization and flow shunting and guide functions comprises three main components including an air bin outer shell, a built-in flow stabilization cavity and a distributary flow guide plate; the built-in flow stabilization cavity and the flow shunting and guide plate are fixed by adopting a fixed grating; the built-in flow stabilization cavity is directly connected with an air chamber air inlet, can prevent vortex generated at the inlet because of flow pass expansion, and plays a flow stabilization effect. A group of circular arc flow shunting and guide plates are distributed along the air flow direction of an air chamber inlet, and play roles of flow shunting and guide effects so as to achieve the requirement of horizontal air distribution uniformity. The boiler air bin air distributing device with the built-in flow stabilization and flow shunting and guide functions provided by the invention can be suitable for requirements of chain grate stoker boilers with different tonnages, is also suitable for the air bin structure transformation of old chain grate stoker boilers, can effectively improve the horizontal air distribution uniformity of a grate, and achieves the energy-saving and emission-reduction effects.

Description

technical field [0001] The invention belongs to the field of energy utilization, and relates to a boiler air chamber air distribution device with built-in functions of stabilizing flow and diverting flow. technical background [0002] At present, the air participating in the coal combustion of the layer-fired boiler is generally sent in through the air bin at the lower part of the chain grate. Air supply on both sides is a common air supply method for chain grate boilers. When the air supply on both sides is adopted, the air distribution along the moving direction of the grate can be controlled by the air intake volume of each air bin, and the horizontal air distribution perpendicular to the moving direction of the grate is determined by the distribution of the air flowing out from the outlet of the independent air bin. Uneven horizontal air distribution causes different air volumes at different positions along the horizontal direction of the grate, and insufficient coal co...

AI Technical Summary

Problems solved by technology

[0005] These research results have improved the uniformity of the outlet flow of the air chamber to varying degrees, but there are deficiencies in the aspects of complex structure, poor operability of air volume distribution, large consumption of metal materials, and large loss of air flow resistance.

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