Two-section combined type selective riser reactor used in catalytic cracking process of petrochemical industry

Abstract

The utility model relates to the technical field of petrochemical engineering catalytic cracking, and discloses a two-section combined type selective riser reactor used in a petrochemical engineering catalytic cracking process, which comprises a main body tank, a riser, a junction station and an oil gas introduction and dispersion mechanism, the left side and the right side of the main body tank are each provided with a lifting pipe connected with a junction station, each lifting pipe is provided with an oil gas guiding-in and dispersing mechanism extending into the corresponding lifting pipe, each lifting pipe comprises a mixing box, a catalyst guiding-in pipe, an oil gas guiding-out pipe, a valve and a splitter blade, the catalyst guiding-in pipes are installed on the lower side of the mixing box, and the oil gas guiding-out pipes are connected with the catalyst guiding-in pipes. A valve is installed on the catalyst ingress pipe, an oil gas ingress pipe connected with the junction station is installed on the upper side of the mixing box, and a plurality of splitter blades are fixed to the position, at the inner bottom end of the mixing box, of the upper side of the catalyst ingress pipe. According to the utility model, oil gas and a catalyst are fully mixed, and the reaction efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical catalytic cracking, in particular to a two-stage combined selective riser reactor used in the process of petrochemical catalytic cracking. Background Art

[0002] Petroleum cracking is the process of breaking hydrocarbons with larger molecular weight and higher boiling point into hydrocarbons with smaller molecular weight and lower boiling point under certain conditions. The cracking reaction that occurs solely by heat is called thermal cracking, and the cracking under the action of a catalyst is called catalytic cracking.

[0003] The riser reactor is a commonly used equipment in oil cracking. It is used to mix oil and gas with catalysts so that the oil and gas are cracked under the action of the catalyst. However, the existing riser reactors directly use pipelines to ventilate the oil and gas and catalysts inside so that they can mix and react by themselves. The mixing degree of oil and gas and catalysts is poor, resulting in insufficient contact between oil and gas and catalysts and low reaction efficiency. Therefore, in view of the above situation, it is urgent to develop a two-stage combined selective riser reactor for petrochemical catalytic cracking process that can fully mix oil and gas with catalysts and has higher reaction efficiency, so as to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The utility model aims to provide a two-stage combined selective riser reactor for use in the catalytic cracking process of petrochemical industry, which can fully mix oil, gas and catalyst and has higher reaction efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process comprises a main tank, a riser, a manifold and an oil and gas introduction and dispersion mechanism, wherein the manifold is installed in the main tank, a riser connected to the manifold is installed on both the left and right sides of the main tank, the oil and gas introduction and dispersion mechanism extending to the interior thereof is installed on the riser, the riser comprises: a mixing box, a catalyst introduction pipe, an oil and gas outlet pipe, a valve and a splitter blade, a catalyst introduction pipe is installed on the lower side of the mixing box, a valve is installed on the catalyst introduction pipe, an oil and gas outlet pipe connected to the manifold is installed on the upper side of the mixing box, and a plurality of splitter blades are fixed on the upper side of the catalyst introduction pipe at the inner bottom end of the mixing box.

[0007] Preferably, the oil and gas introduction and dispersion mechanism comprises: a conduit, an annular tube and a discharge nozzle, the annular tube is installed in the mixing box, a conduit extending to the outside of the mixing box is installed on the annular tube, and a plurality of discharge nozzles are installed in the annular tube.

[0008] Preferably, the annular tube is located above the splitter blades.

[0009] Preferably, a discharge pipe extending to the outside of the main tank is installed on the manifold.

[0010] The beneficial effects of the utility model are as follows: the two-stage combined selective riser reactor used in the catalytic cracking process of petrochemical industry, when in use, opens one riser or opens both risers (just open the valve) according to the demand, then inputs the catalyst from the catalyst inlet pipe into the mixing box, disperses the catalyst into the mixing box through a plurality of diverter blades, and at the same time, the external oil and gas delivery nozzle inputs the oil and gas into the annular pipe through the conduit, and outputs the oil and gas into the mixing box through a plurality of discharge nozzles, thereby making the oil and gas more widely dispersed, improving the mixing degree of the catalyst and the oil and gas, and improving the reaction efficiency, then, the reacted oil and gas enter the conduit into the merger, and then is discharged from the discharge pipe. In summary, the utility model fully mixes the oil and gas with the catalyst, and has a higher reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0012] Figure 2 It is an internal sectional view of the present utility model.

[0013] Figure 3 It is a partial structure diagram of the utility model Figure 1 .

[0014] Figure 4 It is a partial structure diagram of the utility model Figure 2 .

[0015] Legend:

[0016] 1. Main tank; 2. Lifting pipe; 201. Mixing box; 202. Catalyst inlet pipe; 203. Oil and gas outlet pipe; 204. Valve; 205. Diverter blade; 3. Converger; 301. Discharge pipe; 4. Oil and gas introduction and dispersion mechanism; 401. Conduit; 402. Annular pipe; 403. Discharge nozzle. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Specific examples are given below.

[0019] See also Figure 1~Figure 4 In the embodiment of the utility model, a two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process comprises a main tank 1, a riser 2, a manifold 3, and an oil and gas introduction dispersion mechanism 4. The main tank 1 is provided with a manifold 3, and the manifold 3 is provided with a discharge pipe 301 extending to the outside of the main tank 1. The left and right sides of the main tank 1 are provided with a riser 2 connected to the manifold 3, and the riser 2 is provided with an oil and gas introduction dispersion mechanism 4 extending to the inside thereof, and the oil and gas introduction dispersion mechanism 4 is connected to an external oil and gas delivery nozzle. The riser 2 comprises: a mixing box 201, a catalyst introduction pipe 202, an oil and gas outlet pipe 203, a valve 204, and a splitter blade 205. The mixing box A catalyst inlet pipe 202 is installed on the lower side of 201, and a valve 204 is installed on the catalyst inlet pipe 202. An oil and gas outlet pipe 203 connected to the merger 3 is installed on the upper side of the mixing box 201. A plurality of diverter blades 205 are fixed on the upper side of the catalyst inlet pipe 202 at the inner bottom end of the mixing box 201. When in use, the valve 204 is opened, and the catalyst is blown into the mixing box 201 from the catalyst inlet pipe 202. The external oil and gas delivery nozzle delivers the oil and gas to the oil and gas introduction dispersion mechanism 4, and the oil and gas introduction dispersion mechanism 4 then delivers the oil and gas to the mixing box 201, and the catalyst is dispersed in the mixing box 201 through the plurality of diverter blades 205, so that the oil and gas and the catalyst are mixed more fully.

[0020] The oil and gas introduction and dispersion mechanism 4 includes: a conduit 401, an annular tube 402 and a discharge nozzle 403. The annular tube 402 is installed in the mixing box 201. The annular tube 402 is located above the splitter blade 205. The conduit 401 extending to the outside of the mixing box 201 is installed on the annular tube 402. Multiple discharge nozzles 403 are installed in the annular tube 402. The conduit 401 is connected to an external oil and gas delivery nozzle. When in use, the external oil and gas delivery nozzle inputs the oil and gas into the annular tube 402 through the conduit 401, and outputs the catalyst into the mixing box 201 through the multiple discharge nozzles 403, thereby making the oil and gas more widely dispersed and improving the mixing degree of the catalyst and the oil and gas.

[0021] Working principle: The two-stage combined selective riser reactor used in the catalytic cracking process of petrochemical industry, when in use, opens one riser 2 or opens both risers 2 (open valve 204) as required, then inputs the catalyst from the catalyst inlet pipe 202 into the mixing box 201, disperses the catalyst into the mixing box 201 through a plurality of splitter blades 205, and at the same time, the external oil and gas delivery nozzle inputs the oil and gas into the annular pipe 402 through the conduit 401, outputs the oil and gas into the mixing box 201 through a plurality of discharge nozzles 403, thereby making the oil and gas more widely dispersed, improving the mixing degree of the catalyst and the oil and gas, and improving the reaction efficiency, then, the reacted oil and gas enters the combiner 3 from the oil and gas outlet pipe 203, and is discharged from the discharge pipe 301.

[0022] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process, characterized in that: The invention comprises a main tank (1), a lifting pipe (2), a flow collector (3) and an oil and gas introduction and dispersion mechanism (4), wherein the main tank (1) is provided with a flow collector (3), a lifting pipe (2) connected to the flow collector (3) is provided on both the left and right sides of the main tank (1), and the oil and gas introduction and dispersion mechanism (4) extending into the interior of the lifting pipe (2) is provided on the lifting pipe (2), and the lifting pipe (2) comprises: a mixing box (201), a catalyst introduction pipe (202), an oil and gas outlet pipe (203), a valve (204) and a flow splitter blade (205), a catalyst introduction pipe (202) is provided on the lower side of the mixing box (201), a valve (204) is provided on the catalyst introduction pipe (202), an oil and gas outlet pipe (203) connected to the flow collector (3) is provided on the upper side of the mixing box (201), and a plurality of flow splitter blades (205) are fixed on the upper side of the catalyst introduction pipe (202) at the inner bottom end of the mixing box (201).

2. The two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process according to claim 1, characterized in that: The oil and gas introduction and dispersion mechanism (4) comprises: a conduit (401), an annular tube (402) and a discharge nozzle (403); the annular tube (402) is installed in a mixing box (201); a conduit (401) extending to the outside of the mixing box (201) is installed on the annular tube (402); and a plurality of discharge nozzles (403) are installed in the annular tube (402).

3. The two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process according to claim 2, characterized in that: The annular tube (402) is located above the splitter blade (205).

4. The two-stage combined selective riser reactor for use in a petrochemical catalytic cracking process according to claim 1, characterized in that: The flow combiner (3) is provided with a discharge pipe (301) extending to the outside of the main tank (1).

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