Venturi nozzle

Abstract

The invention relates to a venturi nozzle, comprising a nozzle body, a liquid suction pipe and a baffle plate, and peripheral equipment includes a gas pipe, a tank body and a washing liquid; wherein the nozzle body is composed of a shrinking pipe, a throat pipe, an expanding pipe and a straight pipe section from bottom to top. It consists of a uniformly distributed liquid suction port at the intersection of the expansion pipe and the throat pipe. The liquid suction port is welded with the liquid suction pipe, and the baffle is connected to the upper part of the straight pipe section through the strut. The liquid level of the washing liquid in the tank is higher than the height of the suction pipe; the invention actively sucks the liquid into the suction pipe through negative pressure, so that the dust particles and the washing liquid droplets are fully mixed, thereby achieving the dust removal effect, and no additional power device is required. The gas and the washing liquid are fully mixed, the structure is concise, the operation is convenient, and the practicability is strong.

Description

Venturi nozzle technical field The invention relates to a Venturi nozzle, which is applied to the dust removal of harmful mixed gas and belongs to the field of mechanical structures. Background technique In the containment scrubbing and filtering discharge device of nuclear power plants, in order to remove dust from the harmful mixed gas discharged from the overpressure of the containment, it is necessary to install a gas filter device; the main function of the gas filter device is the Venturi nozzle, and the current Venturi nozzle structure It is more complex, requires active operation, cannot be applied to radioactive environments, and cannot meet high requirements for use. Venturi tube dust collector described in ZL03204250.7, the dust collector consists of a gas-water separator constituting the main body of the venturi tube, a shrinkage tube connected to the gas-water separator, and nozzles and water supply pipelines arranged inside and outside the shrink tube and so...

AI Technical Summary

Problems solved by technology

The different positions of the two suction ports of the Venturi nozzle described in US5017331 result in different negative pressures. When the processing capacity of the Venturi nozzle changes, especially when the flow rate decreases, that is, when the gas velocity in the throat decreases, the suction with higher pressure will The liquid port not only cannot absorb liquid, but also causes the leakage of the mixed gas, resulting in a decrease in filtration efficiency and unstable performance

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