Feeding nozzle for catalytic cracking device

Abstract

The utility model relates to the technical field of catalytic cracking devices, in particular to a feeding nozzle for a catalytic cracking device, which comprises an outer pipe, a guide vane, a nozzle head, a conical nozzle hole, a nozzle cap, a round hole, a feeding component and a reinforced mixing component, guide blades are arranged on the inner side of the outer pipe and fixedly connected with the outer pipe, a nozzle head is arranged at one end of the outer pipe, a conical nozzle hole is formed in the inner side of the nozzle head, a nozzle cap is arranged at one end of the nozzle head, the nozzle cap is in threaded connection with the outer pipe, and a round hole is formed in the inner side of the nozzle cap. A reinforced mixing assembly is arranged on the inner side of the outer pipe; according to the catalytic cracking device, the spraying effect is improved by optimizing the nozzle structure, so that the problems that most structural designs have certain defects, catalyst loss is caused, and catalyst consumption in the later operation period of the device is gradually increased due to the catalyst loss are solved, the catalyst loss is reduced, and the working efficiency and the product quality of the catalytic cracking device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalytic cracking devices, in particular to a feed nozzle for a catalytic cracking device. Background Art

[0002] The catalytic cracking unit feed nozzle is a key equipment used in the catalytic cracking unit of an oil refinery. Its main function is to atomize the feed oil so that it can fully contact with the catalyst during the catalytic cracking process, thereby increasing the yield of light oil.

[0003] Most of the feed nozzles used in current catalytic cracking units often have certain structural design defects, which lead to catalyst loss. Catalyst loss will cause the catalyst consumption to gradually increase in the later stage of unit operation, which not only increases the operating cost of the unit, but also reduces the working efficiency and product quality of the catalytic cracking unit.

[0004] Therefore, for the existing feed nozzles for catalytic cracking units, most of the structural designs often have certain defects, which lead to catalyst loss. Catalyst loss will lead to a gradual increase in catalyst consumption in the later stage of the unit operation. A feed nozzle for catalytic cracking units can be designed to improve the injection effect by optimizing the nozzle structure, thereby solving the problem that most of the structural designs often have certain defects, which lead to catalyst loss. Catalyst loss will lead to a gradual increase in catalyst consumption in the later stage of the unit operation, reduce catalyst loss, and improve the working efficiency and product quality of the catalytic cracking unit. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a feed nozzle for a catalytic cracking unit. The feed nozzle for a catalytic cracking unit is intended to solve the technical problem that most structural designs in the existing technology often have certain defects, resulting in catalyst loss, and catalyst loss will lead to a gradual increase in catalyst consumption in the later stage of device operation.

[0006] The technical solution of the utility model is: a feed nozzle for a catalytic cracking device, comprising an outer tube, guide vanes, a nozzle head, a conical nozzle hole, a nozzle cap, a circular hole, a feed assembly and an enhanced mixing assembly; the inner side of the outer tube is provided with a guide vane, the guide vane is fixedly connected to the outer tube, one end of the outer tube is provided with a nozzle head, the inner side of the nozzle head is provided with a conical nozzle hole, one end of the nozzle head is provided with a nozzle cap, the nozzle cap is threadedly connected to the outer tube, the inner side of the nozzle cap is provided with a circular hole, one end of the outer tube is provided with a feed assembly, and the inner side of the outer tube is provided with an enhanced mixing assembly.

[0007] Preferably, the crude oil and atomized steam enter the interior of the outer tube through the feed assembly, and then undergo multiple intensified mixing through the intensified mixing assembly, and then pass through the guide blades. The guide blades help adjust the flow rate and direction of the gas-liquid mixture in the nozzle, improve the injection effect, and then are sprayed out through the conical nozzle hole. The conical nozzle hole is a conical structure with good atomization effect, which helps to improve the mixing degree of the catalyst and the crude oil and reduce catalyst loss. A nozzle cap is provided at one end of the nozzle head, which can prevent the catalyst from entering the nozzle hole and reduce catalyst loss.

[0008] Preferably, the feed assembly includes an atomizing steam inlet, a raw oil inlet, an inner tube steam distributor, a steam distributor hole and an annular mixing chamber; a raw oil inlet is provided on the outside of the outer tube, and the raw oil inlet is fixedly connected to the outer tube.

[0009] Preferably, an atomizing steam inlet is provided at one end of the outer tube, the atomizing steam inlet penetrates the outer tube, and an inner tube steam distributor is provided at one end of the atomizing steam inlet.

[0010] Preferably, a steam distributor hole is provided on the inner side of the inner tube steam distributor, and an annular mixing chamber is provided between the inner tube steam distributor and the outer tube.

[0011] Preferably, the enhanced mixing assembly includes a first distributor, a first mixing chamber, a first enhanced mixing baffle, a second mixing chamber, a second distributor, a third mixing chamber and a second mixing enhanced baffle; a free first distributor is provided on the inner side of the outer tube, and the first distributor is fixedly connected to the outer tube.

[0012] Preferably, a first enhanced mixing baffle is provided on the inner side of the outer tube, a first mixing chamber is opened between the first enhanced mixing baffle and the first distributor, a second distributor is provided on the inner side of the outer tube, and a second mixing chamber is opened between the second distributor and the first enhanced mixing baffle.

[0013] Preferably, a second mixing enhancement baffle is provided on the inner side of the outer tube, the second mixing enhancement baffle is fixedly connected to the outer tube, and a third mixing chamber is provided between the second mixing enhancement baffle and the second distributor.

[0014] Beneficial effects of the utility model:

[0015] 1. Compared with the traditional feed nozzles used in catalytic cracking units, most of the structural designs often have certain defects, which lead to catalyst loss. Catalyst loss will lead to a gradual increase in catalyst consumption in the later stage of the unit operation. This device improves the injection effect by optimizing the nozzle structure, thereby solving the problem that most of the structural designs often have certain defects, which lead to catalyst loss. Catalyst loss will lead to a gradual increase in catalyst consumption in the later stage of the unit operation, reducing catalyst loss and improving the working efficiency and product quality of the catalytic cracking unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the three-dimensional structure of a feed nozzle for a catalytic cracking unit according to the present invention;

[0017] Figure 2 Shown is a schematic cross-sectional view of a feed nozzle for a catalytic cracking unit according to the present invention;

[0018] Figure 3 Shown is a schematic cross-sectional view of an atomizing nozzle assembly of a feed nozzle for a catalytic cracking unit according to the present invention;

[0019] Figure 4 Shown is a schematic cross-sectional view of a feed assembly of a feed nozzle for a catalytic cracking unit according to the present invention;

[0020] Figure 5 Shown is a schematic cross-sectional view of the enhanced mixing assembly of a feed nozzle for a catalytic cracking unit according to the present invention.

[0021] Explanation of the reference numerals: 1. Outer tube; 201. Guide vane; 202. Nozzle head; 203. Conical nozzle hole; 204. Nozzle cap; 205. Circular hole; 301. Atomizing steam inlet; 302. Crude oil inlet; 303. Inner tube steam distributor; 304. Steam distributor hole; 305. Annular mixing chamber; 401. First distributor; 402. First mixing chamber; 403. First enhanced mixing baffle; 404. Second mixing chamber; 405. Second distributor; 406. Third mixing chamber; 407. Second mixing enhanced baffle. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1-Figure 3 The utility model provides an embodiment: a feed nozzle for a catalytic cracking device, comprising an outer tube 1, a guide vane 201, a nozzle head 202, a conical nozzle hole 203, a nozzle cap 204, a circular hole 205, a feed assembly and an enhanced mixing assembly; the guide vane 201 is provided on the inner side of the outer tube 1, the guide vane 201 is fixedly connected to the outer tube 1, a nozzle head 202 is provided at one end of the outer tube 1, a conical nozzle hole 203 is provided on the inner side of the nozzle head 202, a nozzle cap 204 is provided at one end of the nozzle head 202, the nozzle cap 204 is threadedly connected to the outer tube 1, a circular hole 205 is provided on the inner side of the nozzle cap 204, a feed assembly is provided at one end of the outer tube 1, and an enhanced mixing assembly is provided inside the outer tube 1.

[0024] See also Figure 4The feeding component includes an atomizing steam inlet 301, a raw oil inlet 302, an inner tube steam distributor 303, a steam distributor hole 304 and an annular mixing chamber 305; a raw oil inlet 302 is provided on the outside of the outer tube 1, and the raw oil inlet 302 is fixedly connected to the outer tube 1, and the raw oil enters the inside of the outer tube 1 through the raw oil inlet 302, and an atomizing steam inlet 301 is provided at one end of the outer tube 1, and the atomizing steam inlet 301 is penetrated by the outer tube 1, and an inner tube steam distributor 303 is provided at one end of the atomizing steam inlet 301, and atomizing steam enters the inner tube steam distributor 303 through the atomizing steam inlet 301, and a steam distributor hole 304 is provided on the inner side of the inner tube steam distributor 303, and an annular mixing chamber 305 is provided between the inner tube steam distributor 303 and the outer tube 1, and the atomizing steam passes through the steam distributor hole 304 opened on the inner tube steam distributor 303 and is evenly mixed with the raw oil in the annular mixing chamber 305.

[0025] See also Figure 5 In this embodiment, the enhanced mixing component includes a first distributor 401, a first mixing chamber 402, a first enhanced mixing baffle 403, a second mixing chamber 404, a second distributor 405, a third mixing chamber 406 and a second mixing enhanced baffle 407; a first distributor 401 is provided on the inner side of the outer tube 1, and the first distributor 401 is fixedly connected to the outer tube 1. After the atomized steam and the raw oil are evenly mixed, they enter the first mixing chamber 402 through the first distributor 401. A first enhanced mixing baffle 403 is provided on the inner side of the outer tube 1. A first mixing chamber 402 is opened between the first enhanced mixing baffle 403 and the first distributor 401. A second distributor 405 is provided on the inner side of the outer tube 1. The second distributor 405 and the first enhanced mixing baffle A second mixing chamber 404 is opened between 403. After entering the first mixing chamber 402, the vaporized steam is vaporized through the inner tube steam distributor 303 and sprayed into the vapor-liquid two-phase flow in the first mixing chamber 402 at high speed through the first distributor 401, thereby intensifying the collision and shearing of the gas phase and the liquid phase, further refining the liquid, and entering the second mixing chamber 404 through the first enhanced mixing baffle 403 for enhanced mixing. A second mixing enhanced baffle 407 is provided on the inner side of the outer tube 1, and the second mixing enhanced baffle 407 is fixedly connected to the outer tube 1. A third mixing chamber 406 is opened between the second mixing enhanced baffle 407 and the second distributor 405. After enhanced mixing in the second mixing chamber 404, it enters the third mixing chamber 406 through the second distributor 405 for enhanced mixing again.

[0026] When using the feed nozzle for the catalytic cracking unit, the raw oil is poured into the annular mixing chamber 305 through the raw oil inlet 302, the atomized steam enters the inner tube steam distributor 303 through the atomized steam inlet 301, and the atomized steam enters the annular mixing chamber 305 through the steam distributor hole 304 opened on the inner tube steam distributor 303 and is uniformly mixed with the raw oil in the annular mixing chamber 305. After the atomized steam and the raw oil are uniformly mixed, they enter the first mixing chamber 402 through the first distributor 401. After entering the first mixing chamber 402, the vaporized steam passes through the inner tube steam distributor 303 and is sprayed into the vapor-liquid two-phase flow in the first mixing chamber 402 at a high speed through the first distributor 401, thereby intensifying the collision and The liquid is sheared to further refine the liquid, and then passes through the first enhanced mixing baffle 403, the second mixing chamber 404, the second distributor 405, the third mixing chamber 406, and the second mixing enhanced baffle 407 for multiple enhanced mixing, and then passes through the guide blade 201. The guide blade 201 helps to adjust the flow rate and flow direction of the gas-liquid mixture in the nozzle, improves the injection effect, and is ejected through the tapered nozzle hole 203. The tapered nozzle hole 203 is a tapered structure with good atomization effect, which helps to improve the mixing degree of the catalyst and the crude oil and reduce the catalyst loss. A nozzle cap 204 is provided at one end of the nozzle head 202 to prevent the catalyst from entering the nozzle hole and reduce the catalyst loss.

[0027] Through the above steps, the crude oil and the atomized steam enter the interior of the outer tube 1 through the feed component, and then undergo multiple enhanced mixing through the enhanced mixing component, and then pass through the guide blade 201. The guide blade 201 helps to adjust the flow rate and flow direction of the gas-liquid mixture in the nozzle, thereby improving the injection effect, and then is ejected through the conical nozzle hole 203. The conical nozzle hole 203 is a conical structure with a good atomization effect, which helps to improve the degree of mixing between the catalyst and the crude oil and reduce catalyst loss. A nozzle cap 204 is provided at one end of the nozzle head 202. The nozzle cap 204 can prevent the catalyst from entering the nozzle hole and reduce catalyst loss.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A feed nozzle for a catalytic cracking unit, comprising an outer tube (1); characterized in that: The invention also comprises a guide blade (201), a nozzle head (202), a tapered nozzle hole (203), a nozzle cap (204), a circular hole (205), a feed assembly and an enhanced mixing assembly; the guide blade (201) is provided on the inner side of the outer tube (1), the guide blade (201) is fixedly connected to the outer tube (1), one end of the outer tube (1) is provided with a nozzle head (202), the inner side of the nozzle head (202) is provided with a tapered nozzle hole (203), one end of the nozzle head (202) is provided with a nozzle cap (204), the nozzle cap (204) is threadedly connected to the outer tube (1), the inner side of the nozzle cap (204) is provided with a circular hole (205), one end of the outer tube (1) is provided with a feed assembly, and the inner side of the outer tube (1) is provided with an enhanced mixing assembly.

2. A feed nozzle for a catalytic cracking unit according to claim 1, characterized in that: The feed assembly comprises an atomizing steam inlet (301), a raw oil inlet (302), an inner tube steam distributor (303), a steam distributor hole (304) and an annular mixing chamber (305); a raw oil inlet (302) is provided on the outer side of the outer tube (1), and the raw oil inlet (302) is fixedly connected to the outer tube (1).

3. A feed nozzle for a catalytic cracking unit according to claim 2, characterized in that: An atomizing steam inlet (301) is provided at one end of the outer tube (1), the atomizing steam inlet (301) penetrates the outer tube (1), and an inner tube steam distributor (303) is provided at one end of the atomizing steam inlet (301).

4. A feed nozzle for a catalytic cracking unit according to claim 2, characterized in that: A steam distributor hole (304) is provided on the inner side of the inner tube steam distributor (303), and an annular mixing chamber (305) is provided between the inner tube steam distributor (303) and the outer tube (1).

5. The feed nozzle for a catalytic cracking unit according to claim 2, characterized in that: The enhanced mixing assembly comprises a first distributor (401), a first mixing chamber (402), a first enhanced mixing baffle (403), a second mixing chamber (404), a second distributor (405), a third mixing chamber (406) and a second enhanced mixing baffle (407); the first distributor (401) is provided on the inner side of the outer tube (1), and the first distributor (401) is fixedly connected to the outer tube (1).

6. The feed nozzle for a catalytic cracking unit according to claim 1, characterized in that: A first enhanced mixing baffle (403) is provided on the inner side of the outer tube (1), a first mixing chamber (402) is provided between the first enhanced mixing baffle (403) and the first distributor (401), a second distributor (405) is provided on the inner side of the outer tube (1), and a second mixing chamber (404) is provided between the second distributor (405) and the first enhanced mixing baffle (403).

7. A feed nozzle for a catalytic cracking unit according to claim 6, characterized in that: A second mixing enhancement baffle (407) is provided on the inner side of the outer tube (1), the second mixing enhancement baffle (407) is fixedly connected to the outer tube (1), and a third mixing chamber (406) is provided between the second mixing enhancement baffle (407) and the second distributor (405).

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