A vane type variable diameter Venturi throat

Abstract

The invention discloses a vane-type variable-diameter Venturi throat structure, design principle and main performance parameters. , gears, lower fixed plate, lower moving plate, etc. Through the effective operation of each component, the automatic adjustment of the flow rate of the desulfurization flue gas is realized. The beneficial effect of the present invention is: solve the desulfurization "collapsed bed" caused by the change of flue gas volume, realize the stable, continuous and efficient operation of circulating fluidized bed flue gas desulfurization; ‑100% can be adjusted arbitrarily; the equipment is simpler and more compact, and the operation, maintenance and repair are convenient, which improves the operation rate of the equipment; the flue gas flow rate can be adjusted according to the needs, and the recirculation amount of the desulfurizer can be reduced to achieve energy saving and consumption reduction; it can be easily included The desulfurization automatic control system realizes online automatic adjustment with flue gas volume changes.

Description

technical field [0001] The invention relates to the technical field of flue gas purification and environmental protection equipment manufacturing, and relates to flue gas regulating equipment for a circulating fluidized bed desulfurization project, in particular to a blade-type variable-diameter Venturi throat. Background technique [0002] As far as the emission control of flue gas desulfurization of coal-fired boilers is concerned, circulating fluidized bed flue gas desulfurization is widely used as a relatively mature desulfurization process. Circulating fluidized bed flue gas desulfurization is a new type of semi-dry desulfurization process using circulating fluidized bed as a desulfurization absorption reactor. This process makes full use of the unique characteristics of circulating fluidized bed. The gas and reactants reach a state of intense turbulence, the absorbent circulates many times and the contact reaction time with the flue gas is long, which greatly improves ...

AI Technical Summary

Problems solved by technology

Because the load change of the boiler will cause the change of flue gas flow rate, especially when the boiler is at low load, the flue gas volume will be greatly reduced, which will reduce the flow rate of the flue gas entering the desulfurization tower, which often leads to bed collapse in the desulfurization tower (in the circulating fluidized bed) A large number of solid particles fall back to the bottom of the absorption tower), and even desulfurization outages and furnace shutdowns occur

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