SU1243804A1 - Arrangement for inserting catalyst into reactor - Google Patents

Description

one

The invention relates to a device for introducing a de-heated catalyst from a regenerator of a catalytic cracking unit to a through-flow reactor and can be used in the oil refining, petrochemical and chemical industries.

The aim of the invention is to increase the yield of light ‑ target cracking products and reduce coke deposition on the catalyst by reducing the contact time of the overheated catalyst with the feedstock. . .

Figure 1 shows the device, a general view; figure 2 - section aa in figure 1.

A device for introducing a catalyst into a reactor comprises a vertical cylindrical / casing with a bottom 2, an inclined transport pipe 3 connected to the casing 1, an annular manifold 4 for pre-aerating the catalyst placed in the casing 1 and located near its bottom 2, and the nozzles 5 fixed in the bottom 2, a tsidindrichesky shell 6, coaxially mounted on the housing 1 and forming with it an annular chamber 7, and a conical socket 8 connecting the transport pipeline 3 to the cylindrical shell 6. In the case I along its perimeter vtolneny window 9 and equalizing holes 10 connecting the cavity of the housing 1 with the lower and upper portions of the annular chamber 7, respectively, and the nozzles 5 are arranged eccentrically and parallel to the housing axis I about its 9 windows.

Additionally, the device is equipped with splitters 11 and 12 installed in the socket 8 and the annular chamber 7 coaxially with each other and the axes of the transport pipeline 3, while the housing 1 is located between the dividers 11 and 12 and the annular mother liquor placed in the annular chamber 7.

The device works as follows.

The flow of the microspheric catalyst heated during regeneration to

ten

15

20

25

12438042

600-650 ° C, through the transport pipeline 3 enters the socket 8, where the splitter 11 divides the catalyst flow into two streams. From the socket 8, two catalyst flows tangentially from two sides enter the distribution ring chamber 7. In order for the counter catalyst flows in chamber 7 not to collide when they meet, but to flow smoothly into the reactor, there is a diverter inside of the refractory material 12 and mother liquor 13.

Through the availability in the lower part of the body 1 of the window 9 (their number can be from 3 to 10, depending on the diameter of the body), the catalyst enters the internal cavity of the body, where at the beginning it is aerated with a stream of water vapor or its mixture with hydrocarbons. pairs coming through the holes in the annular manifold 4, and then mixed with the stream of sprayed raw materials entering through the nozzles 5. The nozzles 5 spraying the raw material are installed along the reactor axis at the piers between the windows 9 so that the sprayed raw material contacts the catalyst flows from two adjacent windows 9.

In this case, a quick and complete contact of the hot catalyst with the dispersible feedstock is achieved, which ensures that the cracking reaction is complete with minimum catalyst coking.

The reaction products formed upon contact of the raw material with the hot catalyst carry the catalyst up the body 1 to the central part of the reactor (not shown), where they are separated from the catalyst particles. In order to equalize the pressures in chamber 7 and housing 1 above windows 9, equalization holes 10 are located at an angle to its axis, through which part of the fresh catalyst is injected from chamber 7 into housing 1, which further deepens the cracking reaction. To reduce heat losses, the pipeline 3, the bell 8, the chamber 7 and the housing 1 are internally covered with a layer of refractory heat insulation.

thirty

35

40

45

50

fi9.1

13

raw material

Compiler A.Tarasov Editor A.Dolinich Tehred V.Kadar Proofreader I.Erdeyi

Order 3740/9 Circulation 527 Subscription

 VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow ,. Zh-35, Raushska nab., D.4 / 5

Production and printing company, Uzhgorod, Projecto st., 4

Fi & 2

Claims (3)

1. DEVICE FOR INPUT OF THE CATALYST INTO THE REACTOR, comprising a vertical cylindrical body with a bottom, an inclined transport pipe connected to the body, an annular collector for preliminary aeration of the catalyst placed in the body and located near its bottom, and nozzles fixed in the bottom are distinguished. I mean, in order to increase the yield of light target cracking products and reduce coke deposition on the catalyst by reducing the contact time of the superheated catalyst with β-raw material, it is equipped with a cylindrical shell coaxially mounted on the casing and forming an annular chamber with it, and a conical socket, connecting the transport pipeline with a cylindrical shell, while in the case along the perimeter there are windows and equalizing holes connecting the body cavity with the lower and upper parts of the annular chamber ry, respectively, and the nozzles are eccentric * and parallel to the axis of the housing near its windows. 2. The device according to claim 1, characterized in that it is equipped with dividers installed in the socket and the annular chamber aligned with each other and the axis of the transport pipeline, the housing being located between the dividers. 3. The device according to claims 1 and 2, characterized in that it is equipped with an annular mother liquor for introducing steam, located in the annular chamber. 1 1243804 2