Bubble breaking and target type impact combined reinforced throat pipe type nozzle

A bubble breaking, target technology, applied in cracking, injection device, catalytic cracking and other directions, can solve the problems of high oil pressure, large liquid, less application and so on

Active Publication Date: 2021-03-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Bubble breaking and target type impact combined reinforced throat pipe type nozzle
  • Bubble breaking and target type impact combined reinforced throat pipe type nozzle
  • Bubble breaking and target type impact combined reinforced throat pipe type nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Daqing Crude Oil Atomization: A Throat Nozzle Combined with Bubble Breaking and Target Impact, such as figure 1 As shown, a certain flux of Daqing crude oil FLUX oil It is preheated to 220-250°C by an external device, pressurized by a high-pressure pump to about 10 atm, and sent to the nozzle inlet (2), and then enters the outer chamber (6) to be mixed with water vapor. A certain amount of atomized superheated steam FLUX gas It is preheated to 250±20°C by an external device, pressurized by a compressor to about 10atm, and then sent to the steam inlet (3), then enters the inner chamber (7), and then flows out through the foamed porous tube wall (5), and in the tube The outer surface of the wall (5) is mixed with Daqing crude oil to form air bubbles. The bubble-like gas-liquid high-pressure mixed flow continues to flow along the outer cavity (6) to the outlet (27) of the gas-liquid microchannel mixer. Among them, the mass ratio of FLUX gas / FLUX oil =0.8, D5 is 14mm,...

Embodiment 2

[0083] No. 0 diesel oil atomization: Utilize the nozzle structure and parameters in Example 1, replace high-temperature crude oil with normal-temperature No. 0 diesel oil in Beijing, and replace high-temperature water vapor with normal-temperature air. Others are consistent with those in Example 1. Diesel mist droplets with an average particle size of 38 μm can be obtained, the droplet size is significantly reduced, the maximum particle size is 58 μm, and the particle size range is significantly narrowed.

Embodiment 3

[0088] No. 92 gasoline atomization: Utilize the nozzle structure and parameters in Example 1, replace high-temperature crude oil with No. 92 normal-temperature gasoline in the current Beijing area, and replace high-temperature water vapor with normal-temperature air. Others are consistent with those in Example 1. Gasoline mist droplets with an average particle size of 35 μm can be obtained, the droplet size is significantly reduced, the maximum particle size is 55 μm, and the particle size range is significantly narrowed.

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Abstract

The invention relates to the field of catalytic cracking productive chemicals, in particular to an efficient atomizing nozzle technology for crude oil. Provided is a bubble breaking and target type impact combined reinforced throat pipe type nozzle. According to the nozzle, first-stage bubble breaking, second-stage impact breaking, third-stage throat pipe type breaking and fourth-stage throat pipetype re-breaking are included. Finally, crude oil enters a spray head (24) through an expansion buffer chamber (18) and is sprayed out from a nozzle spout (19). Due to the fact that the nozzle spoutis inclined, thin fan-shaped spraying mist flow is finally formed, and the mist flow can be fully mixed with catalyst particle flow from the pre-lifting section. According to the novel nozzle, the principle of instant bubble blasting is fully utilized, the advantages and characteristics of a target type nozzle and a throat pipe type nozzle are integrated, the atomization performance of high-viscosity crude oil is greatly improved, fog drops with small particle sizes and narrow particle size distribution are effectively generated, and the nozzle has the characteristics of adjustable droplet ejection speed, low gas-liquid ratio, stable atomization process, high operation elasticity, simple structure, impact wear resistance, reduction of coking in the cracking process and the like.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B7/04C10G11/00
CPCB05B7/0416C10G11/00C10G2300/1033C10G2300/1055C10G2300/1059C10G2300/1044C10G2300/104
Inventor 公茂明张涛王红岩焦念明周志茂王慧张香平张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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