Multistage-atomization feed nozzle
A technology of feeding nozzle and atomizing chamber, applied in cracking, injection device, catalytic cracking and other directions, can solve the problems of catalyst crushing, high injection speed of raw oil, poor reaction effect, etc. Effect
Active Publication Date: 2016-09-21
QINGDAO JINGRUN PETROCHEM ENG
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Problems solved by technology
[0005] However, in the actual use process, the above-mentioned nozzles have more or less the following problems: first, the atomization effect of the feedstock oil needs to be further improved; wide, the reaction effect is not good; the third is that the spray speed of the atomized raw material oil droplets sprayed out by the nozzle is too high, which seriously breaks the catalyst
Method used
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[0042] Feed rate of raw oil to one nozzle is 25t / h, feed temperature is 250°C, feed pressure is 0.7MPa(G), pressure inside the reactor is 0.2MPa(G); atomizing steam is 1.0t / h, steam temperature is 250°C, steam Pressure 0.8MPa (G).
[0043] according to figure 1 Shown structure of the present invention, nozzle design example is as follows:
[0044] Oil inlet 1 specification DN80, steam port 2 specification DN50, steam port 6 specification DN40, outer pipe 7 inner diameter 132mm, inner pipe 8 outer diameter 89mm, φ3=35mm, B1=20°, A1=12°, 4A number M =10, φB=8mm, 10A number N=12, φD=5mm, 12A number=12, φ1=8mm, B2=15°, A2=8°α=β=15°, C1=C2=5°, L=400mm, the steam output of steam outlet 2 is 700kg / h, the steam output of steam outlet 6 is 300kg / h, 12 12A presses Figure 6 The circular arrangement shown.
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The invention relates to a multistage-atomization feed nozzle which comprises a sprayer, an outer tube, an inner tube, a raw oil inlet, a primary steam inlet, a primary steam pore plate, a secondary steam inlet and a secondary steam pore plate. Primary steam is utilized to perform primary atomization on raw oil in a primary mixing chamber; the raw oil enters the inner tube and is subjected to secondary atomization; secondary steam is utilized to further impact and crush the raw oil in a secondary mixing chamber, thereby implementing tertiary atomization; and the raw oil enters the sprayer and is subjected to quaternary atomization. The nozzle exits of the sprayer have multiple arrangement forms, so that raw-oil-carrying steam forms a broad screen distribution when being sprayed, thereby being beneficial to sufficient contact and reaction between the raw oil and catalyst, and effectively lowering the catalyst crushing.
Description
technical field [0001] The invention belongs to a catalytic cracking device in the field of petroleum refining, and mainly relates to a multi-stage atomization catalytic cracking feed nozzle. Background technique [0002] Raw oil feeding atomization nozzle is an important equipment of catalytic cracking unit in the field of petroleum refining. In the tube reactor, it mixes and reacts with the catalyst in the riser reactor. At present, there are many forms of raw oil feed atomization nozzles used in catalytic cracking units, for example, there are branch pipe type, throat pipe type, Y type, spiral blade type, cone target type and various target type nozzles, domestic nozzles have single The tubular nozzle, that is, adopts a single lumen feeding and air mixing atomization, the use effect is not very ideal. [0003] The nozzle makes the reaction raw material into small droplets, the purpose is to quickly gasify and react. Atomization is not the ultimate goal, but improving th...
Claims
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IPC IPC(8): C10G11/00B05B7/04B05B7/08
CPCB05B7/0416B05B7/08C10G11/00
Inventor 郭伟
Owner QINGDAO JINGRUN PETROCHEM ENG
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