On-line catalyst recovery device for petrochemical production

Abstract

The utility model relates to the technical field of catalyst recovery, in particular to an online catalyst recovery device for petrochemical production. Comprising an agent unloading bin, a catalyst inlet is formed in the top of the agent unloading bin, a catalyst outlet is formed in the bottom of the agent unloading bin, the top of the agent unloading bin is fixedly communicated with a cooling assembly through the catalyst inlet, and a stirring assembly is arranged in the agent unloading bin. The technical measure that the cooling assembly is arranged at the top of the catalyst unloading bin is adopted, the catalyst can exchange heat with the coolant when passing through the cooling assembly, and then the catalyst can be cooled, so that online unloading of the catalyst is achieved; the technical measure that the stirring assembly is arranged in the agent unloading bin is adopted, the catalyst stored in the agent unloading bin can be stirred and mixed, and therefore the technical problem that after entering the agent unloading bin, the catalyst which is not completely cooled is prone to hardening into blocks, and recovery of the catalyst is affected is solved.

Description

Technical Field

[0001] This utility model relates to the field of catalyst recovery technology, specifically to an online catalyst recovery device for petrochemical production. Background Technology

[0002] In petrochemical production, heavy oil catalytic cracking units are an important component. The heavy oil catalytic cracking process requires the addition of catalysts. During this process, heavy metal impurities such as vanadium, nickel, and iron contained in the feedstock gradually deposit on the catalyst surface, reducing the catalyst's activity and selectivity. Therefore, it is necessary to periodically remove some of the waste catalyst from the catalytic cracking unit.

[0003] The catalysts involved in or just completed the reaction are at high temperatures, typically above 500°C. The high temperature causes the catalyst to appear as dust, so it can only be unloaded after it cools down, making online unloading of the catalyst impossible. In addition, if the catalyst is not completely cooled before entering the unloading chamber, it is prone to caking into lumps due to its high temperature, which affects its recovery. Utility Model Content

[0004] This invention provides an online catalyst recovery device for petrochemical production, which aims to solve the technical problem that catalysts participating in or just completing a reaction cannot be unloaded online due to high temperatures, and catalysts that are not completely cooled tend to clump together after entering the unloading chamber, affecting their recovery.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] This utility model provides an online catalyst recovery device for petrochemical production, including a discharging chamber, a catalyst inlet II at the top of the discharging chamber, a catalyst outlet at the bottom of the discharging chamber, a cooling component fixedly connected to the top of the discharging chamber through the catalyst inlet II, and a stirring component installed inside the discharging chamber;

[0007] The cooling assembly includes a catalyst tube and a coolant tube. The coolant tube is sleeved around the outer periphery of the catalyst tube, and a sealed cavity for containing the coolant is formed between the outer wall of the catalyst tube and the inner wall of the coolant tube. The top of the catalyst tube is provided with a catalyst inlet I and a cleaning spray pipe, and the bottom of the catalyst tube is provided with a catalyst outlet. The catalyst outlet is connected to a solenoid valve, and the other end of the solenoid valve is connected to the catalyst inlet II. The top of the outer wall of the coolant tube is provided with a coolant inlet, and the bottom of the outer wall of the coolant tube is provided with a coolant outlet.

[0008] The stirring assembly includes a main shaft, a stirring rod, and a scraper. A drive motor is also provided at the center of the top surface of the unloading chamber. The output shaft of the drive motor is connected to the main shaft, and the drive motor is used to drive the stirring assembly to rotate.

[0009] Furthermore, the upper part of the unloading chamber is cylindrical, and the lower part is conical.

[0010] Furthermore, the unloading chamber is provided with an array of explosion-proof glass windows at equal intervals along the outer periphery of the chamber for observing the storage status of the catalyst. Each array of explosion-proof glass windows consists of three windows and is arranged vertically.

[0011] Furthermore, a nitrogen inlet is provided on the top surface of the unloading chamber, and the nitrogen inlet is connected to a nitrogen source.

[0012] Furthermore, the coolant is circulating water from the petrochemical plant area.

[0013] Furthermore, the distance between the outer edge of the scraper of the stirring assembly and the inner wall of the unloading chamber is 20cm.

[0014] Furthermore, the lower half of the cleaning nozzle is frustum-shaped, and several nozzles are evenly spaced and obliquely downward on the side wall of the lower half of the cleaning nozzle.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] This invention employs a technical measure of installing a cooling component at the top of the unloading chamber. When the catalyst passes through the cooling component, it can exchange heat with the circulating water. This serves two purposes: firstly, it cools the catalyst, thereby enabling online unloading of the catalyst; secondly, it heats the circulating water, thereby achieving the recovery and utilization of the catalyst's waste heat.

[0017] The cooling component of this invention is equipped with a solenoid valve at its outlet. By periodically opening and closing the solenoid valve, the residence time of the catalyst in the cooling component is increased, thereby enhancing the cooling effect. In addition, a cleaning nozzle is provided at the top of the catalyst tube. Several nozzles are evenly spaced and angled downwards at the bottom of the cleaning nozzle. A high-pressure gas source is periodically turned on, and high-pressure gas is sprayed out from the nozzles to clean the inner wall of the catalyst tube and prevent residue. Moreover, by injecting high-pressure gas, high pressure can also be formed inside the catalyst tube, which is conducive to the discharge of catalyst and effectively prevents catalyst from clogging at the solenoid valve.

[0018] This invention, through the technical measure of setting up a stirring component, can stir and mix the catalyst stored inside the unloading chamber, thereby avoiding the technical problem that the catalyst that is not fully cooled is prone to caking into lumps after entering the unloading chamber, which affects its recovery. Furthermore, during the process of exporting the catalyst stored in the unloading chamber to the catalyst storage bag, turning on the stirring component can scrape off the catalyst adhering to the inner wall of the unloading chamber, thereby reducing the residue of the catalyst in the unloading chamber.

[0019] This invention improves the safety of the unloading chamber by installing a nitrogen inlet at the top of the unloading chamber, which is connected to a nitrogen source. In the event of a safety accident in the unloading chamber, nitrogen can be introduced into the chamber in a timely manner to prevent the accident from escalating further. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention;

[0023] Figure 3 This is a front view structural diagram of the stirring assembly of this utility model;

[0024] Figure 4 This is a top view of the stirring assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the cleaning nozzle of this utility model.

[0026] In the diagram, 1. Unloading chamber; 1-1. Catalyst inlet II; 1-2. Catalyst outlet; 1-3. Nitrogen inlet; 1-4. Explosion-proof glass window; 2. Cooling assembly; 2-1. Catalyst pipe; 2-1-1. Catalyst inlet I; 2-1-2. Catalyst outlet; 2-1-3. Cleaning nozzle; 2-1-4. Nozzle; 2-2. Coolant pipe; 2-2-1. Coolant inlet; 2-2-2. Coolant outlet; 3. Stirring assembly; 3-1. Main shaft; 3-2. Stirring rod; 3-3. Scraper; 4. Drive motor; 5. Solenoid valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] like Figures 1-5 As shown, this utility model provides an online catalyst recovery device for petrochemical production, including a discharging chamber 1. The top of the discharging chamber 1 is provided with a catalyst inlet II1-1, and the bottom of the discharging chamber 1 is provided with a catalyst outlet 1-2. The top of the discharging chamber 1 is fixedly connected to a cooling component 2 through the catalyst inlet II1-1, and a stirring component 3 is provided inside the discharging chamber 1.

[0031] The cooling assembly 2 includes a catalyst tube 2-1 and a coolant tube 2-2. The coolant tube 2-2 is sleeved on the outer periphery of the catalyst tube 2-1, and a sealed cavity for containing the coolant is formed between the outer wall of the catalyst tube 2-1 and the inner wall of the coolant tube 2-2. The top of the catalyst tube 2-1 is provided with a catalyst inlet I 2-1-1 and a cleaning spray pipe 2-1-3, and the bottom of the catalyst tube 2-1 is provided with a catalyst outlet 2-1-2. The catalyst outlet 2-1-2 is connected to a solenoid valve 5, and the other end of the solenoid valve 5 is connected to the catalyst inlet II 1-1. By intermittently opening / closing the solenoid valve 5, the catalyst retention time is increased and the heat dissipation effect is enhanced.

[0032] Furthermore, the lower half of the cleaning nozzle 2-1-3 is frustum-shaped, and several nozzles 2-1-4 are evenly spaced and obliquely downward on the side wall of the lower half of the cleaning nozzle 2-1-3; the inlet of the cleaning nozzle 2-1-3 is connected to a nitrogen gas source, and the nitrogen gas source is opened intermittently during operation, firstly to use high-pressure gas to purge the inner wall of the catalyst tube 2-1 to prevent catalyst adhesion, and secondly to create high pressure in the catalyst tube 2-1 to prevent blockage.

[0033] A coolant inlet 2-2-1 is provided at the top of the outer wall of the coolant pipe 2-2, and a coolant outlet 2-2-2 is provided at the bottom of the outer wall of the coolant pipe 2-2; the stirring assembly 3 includes a main shaft 3-1, a stirring rod 3-2, and a scraper 3-3. One end of the stirring rod 3-2 is fixedly connected to the main shaft 3-1, and the other end is fixedly connected to the scraper 3-3. The specific shape is as follows... Figure 3 As shown; a drive motor 4 is also provided at the center of the top surface of the unloading chamber 1. The shaft extension end of the drive motor 4 is fixedly set with the main shaft 3-1 of the stirring assembly 3. The drive motor 4 is used to drive the stirring assembly 3 to rotate along the main shaft 3-1 as the central axis.

[0034] Specifically, the working principle of this utility model is as follows:

[0035] First, coolant is introduced into coolant pipe 2-2 through coolant inlet 2-2-1. After the coolant fills the sealed cavity formed between the inner wall of coolant pipe 2-2 and the outer wall of catalyst pipe 2-1, it flows out from coolant outlet 2-2-2. During this process, the coolant circulates continuously. Then, the high-temperature catalyst enters catalyst pipe 2-1 through catalyst inlet. The high-temperature catalyst exchanges heat with the cooling medium surrounding catalyst pipe 2-1 to achieve the purpose of cooling the catalyst. After further cooling, the catalyst enters unloading chamber 1 at intervals from catalyst outlet 2-1-2 under the control of solenoid valve 5. During this process, drive motor 4 drives stirring component 3 to rotate, so that the catalyst is mixed evenly and then settles, thereby preventing the catalyst from caking into lumps.

[0036] The upper part of the unloading chamber 1 is cylindrical, and the lower part is conical. This design facilitates the export of the catalyst stored in the unloading chamber 1 to the catalyst storage bag.

[0037] The unloading chamber 1 is equipped with several sets of explosion-proof glass windows 1-4 evenly spaced along its outer perimeter for observing the catalyst storage status. Each set of windows 1-4 consists of three vertically arranged windows. This design allows for two main benefits: firstly, it enables the timely detection of potential safety hazards within the unloading chamber 1, facilitating prompt implementation of safety measures; secondly, it allows for the timely transfer of the stored catalyst from the unloading chamber 1 to a catalyst storage bag, preventing overfilling and ensuring proper use.

[0038] The catalyst outlet 1-2 of the unloading chamber 1 is equipped with a valve to control the discharge of the catalyst and facilitate bagging.

[0039] The top surface of the unloading chamber 1 is provided with a nitrogen inlet 1-3, which is connected to a nitrogen source. This design allows for the timely introduction of nitrogen into the unloading chamber 1 in the event of a safety accident, preventing further escalation of the accident and thus improving the safety of the unloading chamber 1 during use.

[0040] The coolant is circulating water from the petrochemical plant area. This design serves two purposes: first, it cools the catalyst, enabling online unloading; second, it heats the circulating water, allowing for the recovery and utilization of waste heat from the catalyst.

[0041] The distance between the outer edge of the scraper 3-3 of the stirring assembly 3 and the inner wall of the unloading chamber 1 is 20cm. With this design, the stirring assembly 3 can be turned on during the process of exporting the catalyst stored in the unloading chamber 1 to the catalyst storage bag, so as to scrape off the catalyst adhering to the inner wall of the unloading chamber 1, thereby reducing the residue of catalyst in the unloading chamber 1.

[0042] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An apparatus for online recovery of catalyst used in petrochemical production, characterized in that: The device comprises a catalyst discharging bin (1), a catalyst inlet II (1-1) is arranged on the top of the catalyst discharging bin (1), a catalyst outlet (1-2) is arranged on the bottom of the catalyst discharging bin (1), the top of the catalyst discharging bin (1) is fixedly connected with a cooling assembly (2) through the catalyst inlet II (1-1), and a stirring assembly (3) is arranged in the catalyst discharging bin (1); The cooling assembly (2) comprises a catalyst pipe (2-1) and a coolant pipe (2-2), the coolant pipe (2-2) is sleeved on the outer circumferential side of the catalyst pipe (2-1), and a cavity for containing coolant is formed between the outer wall of the catalyst pipe (2-1) and the inner wall of the coolant pipe (2-2); a catalyst inlet I (2-1-1) and a cleaning nozzle (2-1-3) are arranged on the top of the catalyst pipe (2-1), a catalyst outlet (2-1-2) is arranged on the bottom of the catalyst pipe (2-1), the catalyst outlet (2-1-2) is connected with a solenoid valve (5), the other end of the solenoid valve (5) is communicated with the catalyst inlet II (1-1), a coolant inlet (2-2-1) is arranged on the top of the outer lateral wall of the coolant pipe (2-2), and a coolant outlet (2-2-2) is arranged on the bottom of the outer lateral wall of the coolant pipe (2-2). The stirring assembly (3) comprises a main shaft (3-1), a stirring rod (3-2) and a scraper (3-3), a driving motor (4) is further arranged on the top surface of the catalyst discharging bin (1), the output shaft of the driving motor (4) is connected with the main shaft (3-1), and the driving motor (4) is used to drive the stirring assembly (3) to rotate.

2. The on-line catalyst recovery unit for petrochemical production according to claim 1, characterized in that: The upper half of the catalyst discharging bin (1) is in a cylindrical shape, and the lower half is in a conical shape.

3. The apparatus for online recovery of catalyst used in petrochemical production according to claim 1, characterized in that: A plurality of explosion-proof glass windows (1-4) for observing the storage state of the catalyst are arranged on the outer circumferential side of the bin body at equal intervals, each group of the explosion-proof glass windows (1-4) is three and is arranged vertically.

4. The on-line catalyst recovery unit for petrochemical production according to claim 1, characterized in that: A nitrogen inlet (1-3) is arranged on the top surface of the catalyst discharging bin (1), and the nitrogen inlet (1-3) is connected with a nitrogen source.

5. The on-line catalyst recovery unit for petrochemical production according to claim 1, characterized in that: The coolant is circulating water from a petrochemical device area.

6. The on-line catalyst recovery unit for petrochemical production according to claim 1, characterized in that: The distance between the outer edge of the scraper (3-3) of the stirring assembly (3) and the inner wall of the catalyst discharging bin (1) is 20 cm.

7. The apparatus for online recovery of catalyst used in petrochemical production according to claim 1, characterized in that: The lower half of the cleaning nozzle (2-1-3) is in a circular truncated cone shape, and a plurality of nozzles (2-1-4) are arranged on the side wall of the lower half of the cleaning nozzle (2-1-3) at equal intervals and obliquely downward.

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