A Throat Nozzle Combined with Bubble Crushing and Target Impact

Abstract

The invention relates to the field of catalytic cracking prolific chemicals, in particular to the crude oil high-efficiency atomization nozzle technology. The throat-type nozzle combined with bubble crushing and target impact includes primary bubble crushing, secondary impact crushing, third-stage throat-type crushing, and fourth-stage throat-type re-crushing. Finally, it enters the spray head (24) through the expansion buffer chamber (18) and sprays out from the nozzle spout (19). Because the nozzle is inclined, a thin fan-shaped spray mist flow is finally formed to facilitate the full mixing of the mist flow and the catalyst particle flow from the pre-lifting section. This new type of nozzle makes full use of the principle of instantaneous bubble blasting, and integrates the advantages and characteristics of target nozzles and throat nozzles, which greatly improves the atomization performance of high-viscosity crude oil, and effectively produces particles with smaller particle size and larger particle size distribution. Narrow droplets, and has the characteristics of adjustable droplet exit speed, low gas-liquid ratio, stable atomization process, large operating flexibility, simple structure, impact and wear resistance, and reduced coking in the cracking process.

Description

technical field [0001] The invention relates to the field of catalytic cracking prolific chemicals, in particular to the crude oil high-efficiency atomization nozzle technology. Background technique [0002] The world's oil refining industry is transforming from a traditional fuel-based refinery to an integrated refining and chemical industry. In recent years, due to the strengthening of environmental protection in various countries around the world, the vigorous development of new energy vehicles, the rapid growth of global chemical demand, the fluctuation and decline of crude oil prices, the world's oil refining industry is being reshaped, and crude oil-produced chemicals have quietly become The direction of competition among the world's major crude oil companies. The chemical yield of traditional fuel-based refineries is about 5% to 10%, the chemical yield of conventional refining and chemical integration equipment is about 10% to 20%, and the crude oil prolific chemical...

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Problems solved by technology

2. Target type nozzles, such as BX-II target type nozzles and straight partition HW type nozzles, mainly use high-pressure oil to impact obstacles at high speed to form oil films on the surface of obstacles, and the high kinetic energy and high turbulence of the lateral atomized airflow Under the action, the oil film breaks rapidly to form sputtering droplets, but this type of nozzle requires high oil pressure and a large gas-liquid ratio

Judging from the current research results, the atomization effect of the bubble nozzle is less affected by the flow rate and viscosity, which is very suitable for the atomization of high-viscosity heavy oil and shows excellent atomization performance, but it is rarely used in domestic devices at present.

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