Bubble tower reactor with stop lever internal component

Abstract

The utility model discloses a bubble tower reactor with a stop lever internal component, which comprises a tower body, a gas inlet arranged at the lower part of the tower body, a gas distributor arranged in the tower body and connected with the gas inlet, and an internal component arranged above the gas distributor in the tower body, the inner component comprises a fixing ring and stop levers which are arranged in the fixing ring at intervals in parallel, the fixing ring is installed on the inner wall of the tower body, the circumference of the fixing ring is attached to the inner circumference of the tower body, the stop levers are horizontally arranged, the two ends of each stop lever are connected to the inner wall of the fixing ring respectively, and the space between every two adjacent stop levers forms a compartment for air and liquid to flow through. And the bottom surface of the stop lever adopts a V-shaped structure which is gradually enlarged from bottom to top. According to the utility model, bubbles are cut in the axial direction to prevent coalescence and are separated in the radial direction to prevent aggregation through components in the stop lever, so that the bubbles are distributed more uniformly in liquid, the gas-liquid contact area is increased, the gas-liquid mass transfer rate is improved, and the reaction process is strengthened.

Description

Technical Field

[0001] This utility model relates to a bubble column reactor with a baffle internal component, belonging to the technical field of gas-liquid bubble column reactors. Background Technology

[0002] Bubble column reactors, due to their excellent heat and mass transfer characteristics, are widely used in petrochemical, biochemical, and energy chemical industries. The oxidation of aldehydes to related carboxylic acids via gas-liquid contact reactions in bubble column reactors is increasingly being scaled up. A significant problem in the scaling up of bubble column reactors is the uneven distribution of bubbles in the axial and radial directions. As bubbles rise from the bottom, they tend to coalesce towards the center of the reactor, affecting the effectiveness of gas-liquid-solid contact and reaction within the reactor. Simultaneously, gas can undergo reverse coalescence, and the resulting plug flow can increase the oxygen concentration in the tail gas, posing safety hazards.

[0003] To address the safety issues arising from bubble coalescence, current technologies typically incorporate internal components within the reactor tower. Based on their function, these internal components, as seen in literature and industrial applications, fall into two categories: one type breaks up the bubbles to prevent coalescence, using materials such as steel wires or serrated steel sheets. These smaller structures can cut and break up the bubbles, offering a simple structure and low pressure loss. However, they are less effective at dispersing bubbles that have gathered at the center of the reactor, sometimes requiring a central sealing measure to disperse the bubbles, increasing manufacturing complexity and pressure loss. The other type alters the bubble flow direction, using multi-layered vertical baffles or perforated plates. This effectively changes the radial distribution of bubbles, but has less effect on breaking them up. Structures like perforated plates, due to the significantly reduced flow area, result in a sharp increase in pressure loss. Utility Model Content

[0004] The purpose of this invention is to provide a bubble column reactor with a baffle internal component, which improves the radial distribution of gas and liquid and solves the technical problem of bubbles coalescing towards the center of the reactor.

[0005] This utility model adopts the following technical solution: a bubble column reactor with baffle internal components, comprising a column body, a gas inlet at the bottom of the column body, a gas distributor connected to the gas inlet inside the column body, and an internal component above the gas distributor inside the column body. The internal component includes a fixing ring and baffles arranged parallel and spaced within the fixing ring. The fixing ring is installed on the inner wall of the column body, and the circumference of the fixing ring fits the inner circumference of the column body. The baffles are arranged horizontally, and both ends of the baffles are respectively connected to the inner wall of the fixing ring. The space between adjacent baffles forms a compartment for gas-liquid flow. The bottom surface of the baffles adopts a V-shaped structure that gradually increases from bottom to top.

[0006] The cross-section of the stop bar is a rhomboid structure, and one of the tips of the stop bar is set downward to form a V-shaped structure.

[0007] The rhomboid side length of the cross-section of the stop bar is 5mm~10mm.

[0008] The middle stop bar is positioned lower than the outer stop bar, and each stop bar is distributed in a concave arc shape within the stop ring.

[0009] The angle of the V-shaped structure of the stop bar is 30°~90°.

[0010] The angle between the line connecting the highest and lowest stop bars and the horizontal plane is 0° to 30°.

[0011] The horizontal distance between the centers of two adjacent baffles is maintained at 1 / 80 to 1 / 50 of the reactor diameter.

[0012] The distance between the baffle and the gas distributor is 0.5 to 1 times the diameter of the reactor.

[0013] When the height-to-diameter ratio of the tower body is more than 2, the internal components of the baffle are arranged in two or more layers above the gas distributor, and the baffles of different layers are staggered.

[0014] A boss is fixed on the inner wall of the tower body, and the fixing ring is fixed on the boss.

[0015] The beneficial effects of this invention are as follows: By setting up baffle internal components in the reaction zone above the gas distributor, the baffles spaced apart obstruct the bubbles, cut the bubbles axially upwards, break up large bubbles, reduce the probability of bubble aggregation, and produce almost no pressure loss. The broken bubbles flow upwards evenly from the gaps between the baffles. The bottom surface of the baffle adopts a V-shaped structure that gradually increases from bottom to top, and the bubble flow area gradually decreases and then increases, which can effectively cut large bubbles at the millimeter level, dividing them into several small bubbles. This disperses the bubbles in the gaps within the reactor, achieving a uniform radial distribution of bubbles, preventing the formation of plunger flow during the upward process, improving the gas-liquid mass transfer rate, and enhancing the reaction process.

[0016] In the preferred embodiment, the cross-section of the baffle is a rhomboid structure, which can first reduce and then increase the gas-liquid flow area. The pressure drop increases as the flow area decreases, which squeezes and disperses the gathered bubbles into multiple baffle compartments, changing the flow state and distribution. Then, the flow area increases, which disperses the bubbles in the compartments into the reactor, achieving a radially uniform distribution of bubbles.

[0017] In the preferred embodiment, the baffles are arranged in an arc shape with higher sides and lower center, which can disperse the bubbles gathered in the center of the reactor and increase the radial uniformity of the bubbles.

[0018] In the preferred embodiment, the angle between the maximum height difference baffles of the same internal component in the horizontal direction is 0~30°. If the reactor is arranged with multiple internal components, the angle can be gradually reduced from bottom to top. The multiple baffle internal components have a multiple squeezing and separating effect on the bubbles, making the radial distribution of the bubbles more uniform, increasing the gas-liquid contact area, and further improving the gas-liquid mass transfer rate.

[0019] In the preferred embodiment, the first layer of the baffle internal components is arranged at a height of 0.5 to 1 times the reactor diameter above the gas distributor. According to CFD simulation, the bubble localization is most severe in this area, and arranging the internal components in this area can maximize the uniform distribution of bubbles.

[0020] In the preferred embodiment, the horizontal distance between the centers of two adjacent baffles is maintained at 1 / 80 to 1 / 50 of the reactor diameter to ensure that there are enough baffle internal components to act on the bubbles. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of a bubble column reactor with baffle internal components according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram illustrating the function of the central stop bar inside the tower body;

[0023] Figure 3 yes Figure 1 Schematic diagram of the internal components of the middle stop bar;

[0024] Figure 4 yes Figure 3 A cross-sectional schematic diagram of a single stop bar;

[0025] Figure 5 yes Figure 3 A schematic diagram of the internal component arrangement.

[0026] In the diagram: 1-Tower body, 2-Internal component of the baffle, 21-Fixing ring, 22-Baffle, 10-Gas distributor, 11-Boss. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] One embodiment of this utility model is a bubble column reactor with a baffle internal component, such as... Figures 1 to 5As shown, the bubble column reactor with baffle internal components in this embodiment includes a column body 1. A gas inlet is provided at the lower part of the column body 1. A gas distributor 10 connected to the gas inlet is provided inside the column body 1. An internal component 2 is provided above the gas distributor 10 inside the column body 1. The internal component includes a fixing ring 21 and baffles 22 arranged parallel and spaced inside the fixing ring 21. The fixing ring 21 is installed on the inner wall of the column body and the circumference of the fixing ring 21 fits the inner circumference of the column body. In this embodiment, a boss is fixed on the inner wall of the column body 1, and the fixing ring 21 is fixed on the boss. The fixing ring 21 is made of steel.

[0029] The baffle 22 is horizontally positioned, with both ends connected to the inner wall of the fixing ring 21. The space between adjacent baffles 22 forms a compartment for gas-liquid flow. The bottom surface of the baffle 22 adopts a V-shaped structure that gradually increases in size from bottom to top. Preferably, in this embodiment, the cross-section of the baffle 22 is a rhomboid structure, with one tip of the baffle 22 pointing downwards to form the V-shaped structure of the baffle. Figure 4 As shown, the angle α of the V-shaped structure of the stop bar is 30°~90°, and the rhomboid side length L of the cross-section of the stop bar 22 is 5mm~10mm. This type of stop bar can effectively cut the millimeter-sized large bubbles produced by the gas distributor 10.

[0030] like Figure 3 As shown, the baffle 22 located in the middle is lower than the baffles located on the outer side, and each baffle 22 is distributed in a concave arc shape within the baffle ring 21. The angle β between the line connecting the highest and lowest baffles and the horizontal plane is 0°~30°. The horizontal distance between the centers of two adjacent baffles is maintained at 1 / 80 to 1 / 50 of the reactor diameter, ensuring that a sufficient number of baffles act on the bubbles. At the same time, the rhomboid structure of the baffles first reduces and then increases the gas-liquid flow area. The decrease in gas-liquid flow area increases the pressure drop, dispersing the accumulated bubbles in the compartments between the baffles. Subsequently, the gas-liquid flow area increases, and the bubbles in the compartments disperse throughout the reactor.

[0031] When the height-to-diameter ratio of the tower body 1 is greater than 2, two or more layers of baffle inner components 2 are arranged above the gas distributor 10, with the baffles 22 staggered between different layers. The distance between the baffle and the gas distributor is 0.5 to 1 times the reactor diameter. This height is where bubble aggregation is severe, and placing the baffle inner components 2 here can effectively reduce bubble aggregation and coalescence, making the radial distribution of bubbles more uniform. In this embodiment, three layers of baffle inner components 2 are used, and the angle β of the baffles with the maximum height difference in the same inner component in the horizontal direction is 0~30°. Since the horizontal distance between adjacent baffles remains unchanged, due to the arc arrangement, the gas-liquid flow area of ​​the baffle inner components 2 gradually increases from the center to the outside. At the same time, the baffle in the center is arranged in a lower position, and due to the pressure difference and arc arrangement, the bubbles in the center of the reactor are more easily dispersed when they come into contact with the baffle inner components 2. If multiple layers of baffle inner components 2 are arranged, the angle β can gradually decrease from bottom to top because the uniformity of bubbles gradually improves with height.

[0032] In practical application, multiple layers of baffle internal components 2 can be arranged according to the actual height of the reactor. Baffle internal components of different heights can be staggered; for example, two layers of baffle internal components 2 can be staggered by 90°, and four layers can be staggered by 45°, etc. The number of layers of baffle internal components is unlimited; several internal components can be arranged above the first layer of baffle internal components based on the height of the bubbling tower and in conjunction with CFD simulation.

[0033] This invention utilizes baffle inner components within the reaction zone above the gas distributor. Due to the angle at the lower end of the baffle inner components, large bubbles are cut and broken in the axial direction, reducing the probability of bubble aggregation. The arc-shaped arrangement of the baffles disperses the bubbles that have gathered in the middle. Simultaneously, the number of baffles reduces the gas-liquid flow area. Through the separation effect, the aggregated bubbles are dispersed, resulting in a more uniform distribution of bubbles in the radial direction. This increases the gas-liquid contact area, improves the gas-liquid mass transfer rate, and enhances the reaction process.

Claims

1. A bubble column reactor with a baffle rod inner member, comprising a column body, a gas inlet being arranged at a lower part of the column body, a gas distributor being arranged in the column body and connected to the gas inlet, and an inner member being arranged in the column body above the gas distributor, characterized in that: The inner member comprises a fixed ring and baffle rods arranged in parallel and spaced apart in the fixed ring, the fixed ring is installed on the inner wall of the tower body, and the circumferential surface of the fixed ring is attached to the inner circumferential surface of the tower body, the baffle rods are arranged horizontally, two ends of the baffle rods are connected to the inner wall of the fixed ring respectively, and the space between adjacent baffle rods forms a compartment for gas-liquid flow.

2. Bubble column reactor with baffle rod internals according to claim 1, characterized in that The cross section of the baffle rod is in a rhombic structure, and one pointed end of the baffle rod is arranged downward to form the V-shaped structure of the baffle rod.

3. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The rhombic side length of the cross section of the baffle rod is 5mm-10mm.

4. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The baffle rods located in the middle are lower than the baffle rods located on the outer side, and each baffle rod is arranged in a concave arc shape in the baffle ring.

5. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The angle of the V-shaped structure of the baffle rod is 30°-90°.

6. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The included angle between the line connecting the baffle rod located at the highest position and the baffle rod located at the lowest position and the horizontal plane is 0°-30°.

7. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The horizontal distance between the centers of two adjacent baffle rods is kept at 1 / 80 to 1 / 50 of the diameter of the reactor.

8. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The distance between the baffle rod and the gas distributor is 0.5 to 1 times the diameter of the reactor.

9. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: When the height-diameter ratio of the tower body is more than 2 times, the baffle rod inner member is arranged above the gas distributor in two or more layers, and the baffle rods in different layers are arranged staggered.

10. The bubble column reactor with baffle-pole internals according to claim 1, characterized in that: The tower body is provided with a boss on the inner wall, and the fixed ring is fixed on the boss.

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