A stirring device for preparing a catalytic cracking flue gas sulfur transfer agent

Abstract

The utility model relates to petroleum processing equipment technical field, concretely relates to a kind of stirring device for preparing catalytic cracking flue gas sulfur transfer agent, device is equipped with the unique height adjustable defoaming component, operator can conveniently adjust protective cover to stick to material liquid level position by rotating handle, the adjustment is realized by ball nut driven by screw rod rotation, driving connecting rod along guide rod stable lifting, fan high-speed rotation is driven by second motor in protective cover, controllable negative pressure area is generated below cover body, foam accumulated on liquid surface is efficiently sucked, foam is immediately cut and broken by precision knife net inside protective cover, subsequently blown apart by airflow through both sides through-hole and re-melted into liquid below, this defoaming process is rapid, active and completely destructive, effectively prevent the adverse effects of foam overflow or accumulation on mixed reaction efficiency and material quality, significantly improve the stability and product uniformity of preparation process.

Description

Technical Field

[0001] This utility model relates to the field of petroleum processing equipment technology, and in particular to a stirring device for preparing sulfur transfer agent in catalytic cracking flue gas. Background Technology

[0002] Sulfur transfer agents for catalytic cracking flue gas are key environmental protection materials used in modern oil refining industries to treat sulfur dioxide emissions generated from the regeneration flue gas of catalytic cracking units. Their main working principle is to efficiently adsorb sulfur-containing compounds, especially sulfur dioxide, in the flue gas through specific active components in the high-temperature environment of the regenerator of the catalytic cracking unit. Subsequently, the adsorbed sulfur is released or converted in the reactor or water vapor environment, and finally treated sulfides or sulfates are generated, thereby significantly reducing the concentration of sulfur oxides emitted into the atmosphere and meeting increasingly stringent environmental regulations.

[0003] In the wet preparation process of sulfur transfer agents for catalytic cracking flue gas, especially in the stirring process involving the mixing, reaction, and subsequent treatment of multiple liquid raw materials, the raw materials themselves may contain surface-active substances or generate gaseous byproducts during stirring, mixing, and chemical reactions. In addition, the vigorous agitation of the stirring blades causes a large amount of air to be entrained, which easily generates abundant and persistent foam on the surface of the liquid material. The continuous accumulation of this foam will occupy the effective space of the tank, resulting in a decrease in the actual throughput. In severe cases, it will cause the material to overflow from the feed port or gaps, resulting in waste and environmental pollution. More importantly, the foam layer will block the effective contact between the main body of the material and the stirring blades, which will seriously weaken the uniformity of stirring and mixing. This will result in uneven dispersion of active components and additives in the material, directly affecting the loading effect of the carrier on the active components. Ultimately, this will lead to batch-to-batch differences or even an overall decrease in key performance indicators such as sulfur adsorption capacity, mechanical strength, and service life of the sulfur transfer agent. The presence of foam may also interfere with subsequent solid-liquid separation, drying, or granulation processes, becoming a bottleneck problem restricting production efficiency and product quality stability.

[0004] To address the aforementioned foaming issues, traditional manufacturing processes commonly employ the method of directly adding chemical defoamers into the mixing tank. While this method is relatively simple to operate, it introduces a series of significant and insurmountable drawbacks. First, as an external additive, the chemical defoamer itself or its decomposition residues inevitably mix into the final product, becoming a source of impurities. These impurities may occupy active sites on the carrier surface or interact with the effective active components of the sulfur transfer agent, potentially reducing the sulfur adsorption activity and selectivity of the product and affecting its core environmental protection function. Second, the effectiveness of defoamers is usually greatly affected by temperature, pH value, and the composition of the material system, resulting in unstable effects. Often, excessive addition or multiple replenishments are required to maintain the defoaming effect, which not only increases raw material costs but also introduces additional variables, increasing the complexity of process control and the risk of product quality fluctuations. Furthermore, the use of chemical defoamers requires specialized storage and management, increasing supply chain links and operational steps. Moreover, their inherent characteristics, such as flammability and non-degradability, bring additional safety and environmental management burdens. Summary of the Invention

[0005] The purpose of this invention is to provide a stirring device for preparing sulfur transfer agent in catalytic cracking flue gas, which solves the problem of high cost of traditional defoaming methods.

[0006] To achieve the above objectives, this utility model provides a stirring device for preparing sulfur transfer agents from catalytic cracking flue gas, comprising a tank, a feeding port fixedly disposed at the upper end of the tank, a first motor fixedly disposed at the upper end of the tank, a heating device fixedly disposed at the left end of the tank, a viewing window fixedly disposed at the right end of the tank, and a support base fixedly disposed at the lower end of the tank. A stirring rod is rotatably disposed inside the tank. The output shaft of the first motor is connected to the stirring rod via a coupling. A defoaming component is disposed inside the tank. The tank, as the core container, contains and carries all materials for mixing and reaction, providing a closed or semi-closed reaction space. The feeding port allows materials to smoothly enter the tank and serves as the material input channel. The first motor provides the main rotational power to drive the stirring system. The heating device generates the necessary heat energy to provide the temperature conditions for internal chemical reactions or material processing. The viewing window allows operators to directly observe the state of the materials inside the tank, the degree of mixing, the liquid level, and the working status of the defoaming component. The support base stably supports the entire device to ensure stable operation and reduce vibration. The stirring rod directly contacts the materials and achieves strong stirring, shearing, and uniform mixing through rotation.

[0007] The defoaming component includes a rotating handle. The rotating handle is movably mounted on the upper end of the tank, and a lead screw is fixedly mounted on the lower end of the rotating handle. The rotating handle is a manual operation interface for the operator to rotate and adjust the height of the defoaming component. The lead screw converts the rotational motion of the rotating handle into a precise linear lifting motion.

[0008] The lead screw is movably equipped with a ball nut, and a connecting rod is fixedly installed at the right end of the ball nut. The ball nut efficiently converts the rotational force of the lead screw into linear motion along the lead screw axis, and the connecting rod transmits the linear motion of the ball nut to the protective cover to realize its lifting and lowering.

[0009] A guide rod is provided through the connecting rod. One end of the guide rod is fixedly connected to the inner wall of the tank. The guide rod provides precise guidance for the lifting and lowering movement of the connecting rod, ensuring a stable and straight movement trajectory and preventing deviation and shaking.

[0010] The lower end of the connecting rod is fixedly equipped with a protective cover, and the upper end of the protective cover is fixedly equipped with a second motor. The protective cover covers the core defoaming component, and its bottom is close to or in contact with the liquid surface. Under the action of the fan, a negative pressure zone is formed to guide the foam in while protecting the internal mechanism. The second motor provides rotational power for the defoaming fan.

[0011] The protective cover has a fixed blade mesh inside, and a fan is rotatably mounted on the lower side of the blade mesh. The blade mesh, located above the fan inside the protective cover, has a sharp structure that powerfully cuts and breaks the sucked-in foam. Driven by a second motor, the fan rotates at high speed, generating negative pressure below the protective cover to suck in the foam and blow out the broken foam airflow.

[0012] The output shaft of the second motor is connected to the fan via a coupling. The protective cover has through holes on both sides, which serve as airflow channels to allow the broken foam airflow to be smoothly blown out and return to the liquid below.

[0013] The tank body has a heat-conducting layer fixedly installed inside, the heating device is connected to the heat-conducting layer, and a discharge valve is fixedly installed at the lower end of the tank body.

[0014] The device is equipped with a unique height-adjustable defoaming component. The operator can easily adjust the protective cover to a position close to the liquid surface by turning the handle. This adjustment is achieved by rotating the lead screw to drive the ball nut, which in turn drives the connecting rod to rise and fall steadily along the guide rod. Inside the protective cover, a second motor drives a fan to rotate at high speed, creating a controllable negative pressure area below the cover. This efficiently sucks in the foam accumulated on the liquid surface. The foam is then powerfully cut and broken by the precision blade mesh inside the protective cover. Subsequently, it is blown away by the airflow through the through holes on both sides and reintegrated into the liquid below. This defoaming process is rapid, proactive, and thorough, effectively preventing foam overflow or accumulation from adversely affecting the mixing reaction efficiency and material quality, and significantly improving the stability of the preparation process and the uniformity of the product. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of the stirring device for preparing sulfur transfer agent in catalytic cracking flue gas according to an embodiment of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of a stirring device for preparing sulfur transfer agent in catalytic cracking flue gas according to an embodiment of the present invention.

[0018] Figure 3 This is a partial cross-sectional schematic diagram of the stirring device according to an embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional structural diagram of the defoaming component according to an embodiment of the present invention.

[0020] 1. Bracket, 2. Beam, 3. Reinforcing component, 4. Hanging plate, 5. Groove, 6. Rope, 7. Fixing seat, 8. Precast beam, 9. Double-acting screw, 10. Coupling, 11. Ball nut, 12. Moving block, 13. Through hole, 14. Guide rod, 15. Clamping plate, 16. Protrusion, 17. Damper, 18. Motor. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figures 1-4 A stirring device for preparing a sulfur transfer agent from catalytic cracking flue gas includes a tank 1. A feeding port 2 is fixedly installed at the upper end of the tank 1. A first motor 3 is fixedly installed at the upper end of the tank 1. A heating device 4 is fixedly installed at the left end of the tank 1. A viewing window 5 is fixedly installed at the right end of the tank 1. A support base 6 is fixedly installed at the lower end of the tank 1. A stirring rod 7 is rotatably mounted inside the tank 1. The output shaft of the first motor 3 is connected to the stirring rod 7 via a coupling. A defoaming component is installed inside the tank 1. The tank 1 serves as the main container to hold materials and provide a mixing and reaction space. The feeding port 2 is... The material enters the inlet channel of the tank 1. The first motor 3 is powered and rotates to generate power and drives the stirring rod 7 to rotate through the coupling. The rotating stirring rod 7 stirs, mixes and shears the material in the tank 1. The heating device 4 is powered and generates heat energy. The heat-conducting layer 19 is in close contact with the heating device 4 and covers the inner wall of the tank 1 to conduct heat evenly and efficiently to the internal material to maintain the reaction temperature. The viewing window 5 is made of transparent material to allow the operator to directly observe the internal condition of the tank 1. The support base 6 is fixed to the ground or base to provide stable support for the entire device and prevent vibration. During the stirring process, the material reacts and produces foam.

[0023] The defoaming assembly includes a rotating handle 8. The rotating handle 8 is movably mounted on the upper end of the tank body 1. A lead screw 9 is fixedly mounted on the lower end of the rotating handle 8. A ball nut 10 is movably mounted on the lead screw 9. A connecting rod 11 is fixedly mounted on the right end of the ball nut 10. A guide rod 12 is passed through the connecting rod 11. One end of the guide rod 12 is fixedly connected to the inner wall of the tank body 1. The rotating handle 8 can be rotated manually. The lead screw 9 is fixedly connected to the rotating handle 8 and converts the rotational motion into its own precise axial rotation. The ball nut 10 has embedded balls that engage with the threaded lead screw 9, efficiently converting the rotational motion of the lead screw 9 into its own linear lifting motion. One end of the connecting rod 11 is fixed to the ball nut 10, and the other end is connected to the protective cover 13, thereby transmitting the linear lifting motion to the protective cover 13. The guide rod 12 passes through the hole on the connecting rod 11 to provide precise guidance for the lifting motion of the connecting rod 11 and the protective cover 13, maintaining vertical stability.

[0024] A protective cover 13 is fixedly installed at the lower end of the connecting rod 11, and a second motor 14 is fixedly installed at the upper end of the protective cover 13. A blade mesh 15 is fixedly installed inside the protective cover 13, and a fan 16 is rotatably installed on the lower side of the blade mesh 15. The output shaft of the second motor 14 is connected to the fan 16 through a coupling 17. Through holes 18 are opened on the left and right sides of the protective cover 13. A heat-conducting layer 19 is fixedly installed inside the tank body 1, and the heating device 4 is connected to the heat-conducting layer 19. A discharge valve 20 is fixedly installed at the lower end of the tank body 1. The protective cover 13 is raised and lowered by the connecting rod 11 so that its bottom can be adjusted to be close to or in contact with the liquid surface. The second motor 14 is fixed inside the protective cover 13 and rotates to generate power. The coupling 17 is connected to the fan 16 through a coupling 18. 7 connects the output shaft of the second motor 14 to the shaft of the fan 16 to reliably transmit rotational power. Driven by the second motor 14, the fan 16 rotates at high speed to form a negative pressure area at the bottom opening of the protective cover 13. The negative pressure draws the foam on the liquid surface into the protective cover 13. The blade mesh 15 is fixed inside the protective cover 13. The fan 16 above has sharp edges or a mesh structure to mechanically cut and break the foam. The broken foam airflow is blown out from the through holes 18 on both sides of the protective cover 13 by the wind force generated by the rotation of the fan 16 and disperses back into the liquid below to complete the defoaming process. The discharge valve 20 is installed at the bottom of the tank 1. The valve opens to control the discharge flow rate of the material after the reaction and ensures thorough discharge to reduce residue.

[0025] Working principle: Material enters the tank 1 through the feed port 2. The first motor 3 is started, driving the stirring rod 7 through the output shaft to stir and promote the mixing and reaction of the material. During the stirring process, foam will be generated due to the chemical reaction and accumulate on the liquid surface, which may affect the mixing efficiency. In order to eliminate the foam, the operator observes the internal situation through the viewing window 5 and rotates the rotating handle 8 to adjust the height of the defoaming component. The rotating handle 8 drives the lead screw 9 to rotate, and the ball nut 10 converts the rotational force into up and down movement. The connecting rod 11 moves along the guide rod 12, thereby adjusting the position of the protective cover 13 to make it close to the liquid surface. The second motor 14 is started, driving the fan 16 to rotate through the coupling 17. A negative pressure is generated below the protective cover 13, and the foam is sucked into the protective cover 13 and passed through the blade. After the mesh 15 is broken, it is blown out through the through hole 18 and returned to the liquid, achieving efficient defoaming. At the same time, the heating device 4 heats the inside of the tank 1 evenly through the heat-conducting layer 19 to maintain the reaction temperature. After stirring, the product is discharged through the discharge valve 20. The whole process ensures the uniformity and efficiency of the preparation of sulfur transfer agent for catalytic cracking flue gas. The support base 6 provides stable support to prevent the equipment from shaking. The height adjustment of the defoaming component can adapt to different liquid levels. The rotation speed of the fan 16 is adjustable to optimize the negative pressure effect. The fine structure of the blade mesh 15 enhances the foam breaking ability. The design of the through hole 18 ensures smooth airflow return. The thermal conductivity of the heat-conducting layer 19 ensures uniform temperature distribution. The discharge valve 20 controls the discharge timing to avoid residue. The feeding port 2 facilitates material addition.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A stirring device for preparing sulfur transfer agent from catalytic cracking flue gas, comprising a tank (1), characterized in that, A feeding port (2) is fixedly provided at the upper end of the tank (1), a first motor (3) is fixedly provided at the upper end of the tank (1), a heating device (4) is fixedly provided at the left end of the tank (1), a viewing window (5) is fixedly provided at the right end of the tank (1), a support base (6) is fixedly provided at the lower end of the tank (1), a stirring rod (7) is rotatably provided inside the tank (1), the output shaft of the first motor (3) is connected to the stirring rod (7) through a coupling, and a defoaming component is provided inside the tank (1), the defoaming component including a rotating handle ( 8) A rotating handle (8) is movably provided at the upper end of the tank body (1), and a lead screw (9) is fixedly provided at the lower end of the rotating handle (8); a ball nut (10) is movably provided on the upper part of the lead screw (9), and a connecting rod (11) is fixedly provided at the right end of the ball nut (10); a protective cover (13) is fixedly provided at the lower end of the connecting rod (11), and a second motor (14) is fixedly provided at the upper end of the protective cover (13); a blade net (15) is fixedly provided inside the protective cover (13), and a fan (16) is rotatably provided on the lower side of the blade net (15).

2. The stirring device for preparing sulfur transfer agent in catalytic cracking flue gas as described in claim 1, characterized in that, A guide rod (12) is provided through the connecting rod (11), and one end of the guide rod (12) is fixedly connected to the inner wall of the tank (1).

3. The stirring apparatus for preparing sulfur transfer agent in catalytic cracking flue gas as described in claim 1, characterized in that, The output shaft of the second motor (14) is connected to the fan (16) via a coupling (17), and through holes (18) are provided on the left and right sides of the protective cover (13).

4. The stirring apparatus for preparing sulfur transfer agent in catalytic cracking flue gas as described in claim 1, characterized in that, A heat-conducting layer (19) is fixedly installed inside the tank (1), and the heating device (4) is connected to the heat-conducting layer (19). A discharge valve (20) is fixedly installed at the lower end of the tank (1).

Images