Organic sulfur hydrolysis column gas distribution device and organic sulfur hydrolysis column thereof

Abstract

The utility model discloses an organic sulfur hydrolysis tower gas distribution device relates to coke oven gas fine desulfurization equipment field, including primary distributor and cylinder type tongue hole distribution cap, cylinder type tongue hole distribution cap is cylindrical cap cover, this cylindrical cap cover has the distribution cap cylinder body of cylindrical shape and sets up the sealing cover plate at the top of cylinder body, and the distribution cap cylinder body side wall sets up multiple rows tongue hole along the circumferential direction to the outside, and the tongue hole opening direction between the adjacent upper and lower rows of tongue hole is staggered arrangement according to the sequence of one row clockwise direction, one row counterclockwise direction, primary distributor is any one of row pipe type distributor, ring pipe type distributor or disc type distributor, and the bottom of cylinder type tongue hole distribution cap communicates with primary distributor, compared with prior art, the utility model discloses cylinder type tongue hole distribution cap realizes gas secondary mixing injection through the tongue hole of clockwise opening direction and counterclockwise opening direction of staggered arrangement, improves gas mixing uniformity, avoids bed layer partial flow phenomenon, ensures that gas and catalyst contact fully, improves reaction efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of coke oven gas desulfurization equipment, and in particular to a gas distribution device for an organic sulfur hydrolysis tower and the organic sulfur hydrolysis tower thereof. Background Technology

[0002] With increasingly stringent national environmental protection requirements, coke oven gas, originally considered a relatively clean fuel, no longer meets current ultra-low emission standards for its exhaust emissions. To meet the ultra-low emission requirements for sulfur dioxide, many coking plants in China have successively built desulfurization units, including processes such as iron oxide desulfurization, activated carbon desulfurization, and microcrystalline adsorption desulfurization. Detailed analysis of hydrogen sulfide and organic sulfur compounds in coke oven gas shows that while the desulfurization units already in operation can efficiently remove hydrogen sulfide, their efficiency in removing organic sulfur is limited. Data from domestic manufacturers such as Liuzhou Iron & Steel, Fangshan Iron & Steel, and Maanshan Iron & Steel shows that despite relevant treatment measures, the organic sulfur content in the gas still exceeds 300 mg / m³ (based on elemental sulfur), far exceeding the requirements of ultra-low emission standards. In recent years, several studies have focused on the hydrolysis technology of organic sulfur in coke oven gas, achieving some success. However, with the expansion of plant scale, the distribution of gas within the hydrolysis tower has become a crucial factor affecting hydrolysis efficiency. Uneven gas feed distribution can cause bed flow deviation and short-circuiting, leading to uneven contact between the gas and catalyst, resulting in incomplete reaction, poor treatment effect, and catalyst pulverization. To address this issue, current coke oven gas desulfurization units commonly employ methods such as filling the bottom of the catalyst with ceramic balls or increasing the catalyst loading height. However, with the increasing scale of the plant, the efficiency and economics of these methods are gradually declining. Currently, gas distributors used in other fields mainly fall into three types: ring-type feed distributors, manifold-type feed distributors, and disc distributors. Among these, ring-type feed distributors and manifold-type feed distributors both belong to the manifold-type gas distributor category, while disc distributors are also known as plate distributors. Information on these three types of distributors can be found on page 931 of *Modern Tower Technology* (Second Edition), in the section on gas distribution plates. For reactors with less stringent requirements for gas feed distribution, loop feed distributors, manifold feed distributors, or disc distributors can adequately meet process requirements. However, in coke oven gas organic sulfur hydrolysis units, the gas feed needs to contact the catalyst for a short time to complete the reaction, and the bed height is relatively small, making it unsuitable to achieve uniform gas feed distribution by increasing the bed height. Furthermore, due to the high cost and short lifespan of the catalyst used, catalyst loading must consider the need for regeneration at the plant. Distributing gas by filling with ceramic balls would affect the purity of the regenerated catalyst. Therefore, in this field, simply using loop feed distributors, manifold feed distributors, or disc distributors has limited effectiveness and cannot fundamentally solve the problem of uneven gas feed distribution. Utility Model Content

[0003] One of the objectives of this invention is to provide a gas distribution device for an organic sulfur hydrolysis tower, which can solve the problem that existing gas distributors cannot fundamentally address the issue of uneven gas feed distribution leading to low reaction efficiency and easy catalyst loss.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: This organic sulfur hydrolysis tower gas distribution device includes a primary distributor and a cylindrical tongue-shaped distribution cap. The cylindrical tongue-shaped distribution cap is a cylindrical cap cover with a cylindrical distribution cap body and a sealing cover plate on the top of the distribution cap body. Multiple rows of tongue holes are arranged outward along the circumferential direction on the side wall of the distribution cap body. The opening direction of the tongue holes is staggered between adjacent upper and lower rows in a clockwise direction and a counterclockwise direction. The primary distributor is any one of a pipe-type distributor, a ring-type distributor, or a disc-type distributor. The bottom of the cylindrical tongue-shaped distribution cap is connected to the primary distributor.

[0005] In the above-mentioned technical solution of the gas distribution device for the organic sulfur hydrolysis tower, a more specific technical solution may be: the tongue holes in the clockwise opening direction and the tongue holes in the counterclockwise opening direction are arranged in 2 to 15 rows on the side wall of the distribution cap body, and the number of tongue holes in each row is evenly distributed along the circumference of the distribution cap body.

[0006] In some possible implementations, the tongue hole is inclined outward at an angle of 15° to 60° to the wall of the distribution cap body, and the inclination directions of the tongue hole in the clockwise opening direction and the tongue hole in the counterclockwise opening direction are respectively along the clockwise and counterclockwise tangential directions.

[0007] In some possible implementations, the primary distributor is fixedly installed on the wall of the organic sulfur hydrolysis tower by a support, the support being bolted or welded to the tower wall, and the cylindrical tongue-shaped distribution cap being welded to the primary distributor at the connection point.

[0008] In some possible implementations, the primary distributor includes a main pipe, multiple branch pipes, and multiple sub-branch pipes, with the branch pipes vertically connected to the main pipe and the sub-branch pipes vertically connected to the sub-branch pipes, and the bottom of the cylindrical tongue-shaped distribution cap being connected to each sub-branch pipe in a corresponding manner.

[0009] In some possible implementations, the thickness of the distribution cap body wall is 3mm to 10mm, the tongue hole is a rectangular hole with a diameter of (5 to 20mm) × (15 to 30mm), and the tongue holes in adjacent rows are staggered.

[0010] In some possible implementations, the height of the cylindrical tongue-shaped distribution cap is 50mm to 300mm and the diameter is 30mm to 150mm, and multiple cylindrical tongue-shaped distribution caps are evenly arranged along the extension direction of the primary distributor.

[0011] In some possible implementations, a flow regulating valve is provided at the connection between the primary distributor and the air intake pipe, and the diameter of the air intake pipe is adapted to the diameter of the main pipe of the primary distributor, with an adaptation ratio of 1:1 to 1.5:1.

[0012] The second objective of this invention is to provide an organic sulfur hydrolysis tower that can achieve rapid and uniform mixing and distribution of gas, thereby improving the efficiency and stability of the hydrolysis reaction.

[0013] To solve the above-mentioned technical problems, the technical solution adopted by this organic sulfur hydrolysis tower is: including the gas distribution device as described in any one of claims 1 to 8, wherein the gas distribution device is disposed below the catalyst bed in the hydrolysis tower, and the distance between the top of the gas distribution device and the catalyst bed is H, wherein H is 300 mm to 1000 mm.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. As this utility model includes a primary distributor and a cylindrical tongue-shaped orifice distribution cap, it adopts a two-stage distribution design. The primary distributor realizes the initial gas distribution, and the cylindrical tongue-shaped orifice distribution cap realizes the secondary gas mixing and injection through the staggered clockwise and counterclockwise opening directions of the tongue-shaped orifice, which significantly improves the gas mixing uniformity, avoids bed flow deviation and short-circuit phenomenon, ensures that the gas and catalyst are in full contact, and improves reaction efficiency and stability.

[0015] 2. Uniform gas distribution can be achieved without increasing the catalyst bed height, which is suitable for the process requirements of small bed height in coke oven gas organic sulfur hydrolysis unit. At the same time, it avoids the catalyst regeneration purity problem caused by filling ceramic balls, thus reducing operating costs.

[0016] 3. The primary distributor can be flexibly selected from pipe type, ring type or disc type distributors to adapt to different specifications of hydrolysis towers and process requirements, and has strong versatility.

[0017] 4. The structure is simple and compact, and the installation and maintenance are convenient. It can be widely used in the organic sulfur hydrolysis tower of the coke oven gas desulfurization system, and can also be used in similar gas reaction equipment such as hydrogen sulfide adsorption tower. Attached Figure Description

[0018] Figure 1 This is the main drawing of the gas distribution device of this utility model.

[0019] Figure 2 This is a top view of the gas distribution device of this utility model.

[0020] Figure 3 This is an unfolded view of the side wall of the cap body of this utility model.

[0021] Figure 4 for Figure 3 AA sectional view.

[0022] Figure 5 This is a schematic diagram of the gas distribution device of this utility model installed inside an organic sulfur hydrolysis tower.

[0023] In the diagram: 1. Primary distributor, 1-1. Main pipe, 1-2. Branch pipe, 2. Cylindrical tongue-shaped distribution cap, 2-1. Distribution cap body, 2-2. Sealing cover, 3. Tongue opening in clockwise direction, 4. Tongue opening in counterclockwise direction, 5. Support, 6. Tower wall, 7. Catalyst bed, 8. Inlet pipe. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figures 1-4 The embodiment shown proposes a gas distribution device for an organic sulfur hydrolysis tower, including a primary distributor 1 and a cylindrical tongue-shaped distribution cap 2. The cylindrical tongue-shaped distribution cap is a cylindrical cap cover, which has a cylindrical distribution cap body 2-1 and a sealing cover plate 2-2 on the top of the distribution cap body. The side wall of the distribution cap body 2-1 is provided with multiple rows of tongue holes along the circumferential outwards. The opening direction of the tongue holes is staggered between adjacent rows in a clockwise direction and a counterclockwise direction. The primary distributor 1 is a pipe-type distributor, directly connected to... The intake pipe 8 is connected for primary gas distribution. The bottom of the cylindrical tongue-shaped distribution cap 2 is connected to the primary distributor 1 to achieve secondary gas distribution. Nine rows each of clockwise and counterclockwise opening tongue holes 3 and 4 are arranged on the side wall of the distribution cap cylinder 2-1, with the number of tongue holes in each row evenly distributed along the circumference of the distribution cap cylinder. Efficient mixing is achieved through clockwise and counterclockwise gas injection. The tongue holes are inclined outwards at an angle of 15° to 60° to the wall surface of the distribution cap cylinder 2-1. The clockwise opening tongue holes 3 and counterclockwise opening tongue holes 4 are arranged in a circumferential direction. The inclination direction of the tongue hole 4 in the needle opening direction is along the clockwise and counterclockwise tangential directions respectively; the primary distributor 1 is fixedly installed on the tower wall 6 of the organic sulfur hydrolysis tower by means of a support 5, and the support 5 is fixed to the tower wall of the organic sulfur hydrolysis tower by welding. The cylindrical tongue hole distribution cap 2 is connected to the primary distributor 1 by welding at the connection point; the primary distributor may include a main pipe 1-1 and multiple branch pipes 1-2, the branch pipes 1-2 are vertically connected to the main pipe 1-1, and the bottom of the cylindrical tongue hole distribution cap is connected to the branch pipes and the main pipe one by one; the thickness of the distribution cap cylinder wall is 3mm to 10mm. mm, the tongue hole is a rectangular hole with a diameter of (5~20mm)×(15~30mm). The tongue holes in two adjacent rows can be staggered or arranged side by side; the height of the cylindrical tongue hole distribution cap 1 is 50mm~300mm and the diameter is 30mm~150mm. Multiple cylindrical tongue hole distribution caps are evenly arranged along the extension direction of the primary distributor; a flow regulating valve is set at the connection between the primary distributor 1 and the air inlet pipe 8. The pipe diameter of the air inlet pipe 8 is matched with the pipe diameter of the main pipe 1-1 of the primary distributor 1, and the matching ratio is 1:1~1.5:1.

[0027] In other embodiments, the primary distributor may also include a main pipe, multiple branch pipes, and multiple sub-branch pipes. The branch pipes are vertically connected to the main pipe, and the sub-branch pipes are vertically connected to the sub-branch pipes. The bottom of the cylindrical tongue-shaped distribution cap is connected to the main pipe, branch pipes, and sub-branch pipes one by one. The tongue holes with clockwise opening direction and the tongue holes with counterclockwise opening direction on the side wall of the distribution cap cylinder can each be arranged in 2 to 15 rows, which can be flexibly adjusted according to the specifications and throughput of the hydrolysis tower to ensure the gas injection mixing effect.

[0028] like Figure 5 The embodiment shown proposes an organic sulfur hydrolysis tower. The gas distribution device of this organic sulfur hydrolysis tower includes a primary distributor 1 and a cylindrical tongue-shaped distribution cap 2. The cylindrical tongue-shaped distribution cap is a cylindrical cap cover, which has a cylindrical distribution cap body 2-1 and a sealing cover plate 2-2 on the top of the body. Multiple rows of tongue-shaped holes are arranged circumferentially outwards on the side wall of the distribution cap body 2-1. The opening directions of adjacent tongue-shaped holes are alternately arranged in a clockwise direction and a counterclockwise direction. The primary distributor 1 is a pipe-type distributor. The device is directly connected to the intake pipe 8 for primary gas distribution. The bottom of the cylindrical tongue-shaped distribution cap 2 is connected to the primary distributor 1 to achieve secondary gas distribution. Nine rows each of clockwise and counterclockwise opening tongue holes 3 and 4 are arranged on the side wall of the distribution cap cylinder 2-1, with the number of tongue holes in each row evenly distributed along the circumference of the distribution cap cylinder. Efficient mixing is achieved through clockwise and counterclockwise gas injection. The tongue holes are inclined outwards at an angle of 15° to 60° to the wall surface of the distribution cap cylinder 2-1. The clockwise opening tongue holes 3... The inclination direction of the tongue-shaped orifice 4, which opens counterclockwise, is along the clockwise and counterclockwise tangential directions, respectively; the primary distributor 1 is fixedly installed on the tower wall 6 of the organic sulfur hydrolysis tower by means of a support 5, and the support 5 is fixed to the tower wall of the organic sulfur hydrolysis tower by welding; the cylindrical tongue-shaped orifice distribution cap 2 is connected to the primary distributor 1 by welding; the primary distributor may include a main pipe 1-1 and multiple branch pipes 1-2, with the branch pipes 1-2 vertically connected to the main pipe 1-1; the bottom of the cylindrical tongue-shaped orifice distribution cap is connected to the branch pipes and the main pipe one by one; the thickness of the distribution cap cylinder wall is 3mm~1mm. 0mm, the tongue hole is a rectangular hole with a diameter of (5~20mm)×(15~30mm). The tongue holes in two adjacent rows can be staggered or arranged side by side; the height of the cylindrical tongue hole distribution cap 1 is 50mm~300mm and the diameter is 30mm~150mm. Multiple cylindrical tongue hole distribution caps are evenly arranged along the extension direction of the primary distributor; a flow regulating valve is set at the connection between the primary distributor 1 and the air inlet pipe 8. The pipe diameter of the air inlet pipe 8 is matched with the pipe diameter of the main pipe 1-1 of the primary distributor 1, and the matching ratio is 1:1~1.5:1.

[0029] The gas distribution device 1 is located below the catalyst bed 7 in the hydrolysis tower. The distance between the top of the gas distribution device 1 and the catalyst bed 7 is H, where H is 300 mm to 1000 mm.

[0030] The working process of this embodiment is as follows: Coke oven gas enters the pipe-type distributor 1 through the inlet pipe, where it undergoes primary uniform distribution through the diversion of the main pipe and branch pipes. Subsequently, the gas enters each cylindrical tongue-shaped distribution cap and is injected outward through the clockwise and counterclockwise opening tongues on the side wall of the distribution cap cylinder, achieving secondary mixing and uniform distribution during the injection process. Finally, the uniformly distributed gas rapidly enters the catalyst bed (alumina-based organic sulfur hydrolysis catalyst) above, fully contacts the catalyst, and undergoes an organic sulfur hydrolysis reaction, significantly improving reaction efficiency and stability.

[0031] This utility model is not limited to the above embodiments. The primary distributor can also be a ring-type distributor or a disc-type distributor. The size, number of orifices, and arrangement density of the cylindrical tongue-shaped distributor cap can be flexibly adjusted according to the specifications of the hydrolysis tower, the gas processing capacity, and other parameters, all of which fall within the protection scope of this utility model. This gas distribution device is not only suitable for coke oven gas organic sulfur hydrolysis towers, but also for reaction equipment requiring uniform gas distribution, such as hydrogen sulfide adsorption towers.

[0032] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A gas distribution device for an organic sulfur hydrolysis tower, characterized in that: The device includes a primary distributor and a cylindrical tongue-hole distribution cap. The cylindrical tongue-hole distribution cap is a cylindrical cap cover with a cylindrical distribution cap body and a sealing cover plate on the top of the body. The side wall of the distribution cap body is provided with multiple rows of tongue holes circumferentially outward. The opening directions of the tongue holes are staggered in a clockwise and counterclockwise order between adjacent rows. The primary distributor is any one of a pipe-type distributor, a ring-type distributor, or a disc-type distributor. The bottom of the cylindrical tongue-hole distribution cap is connected to the primary distributor.

2. The gas distribution device for the organic sulfur hydrolysis tower according to claim 1, characterized in that: The distribution cap body has 2 to 15 rows of tongue holes in both the clockwise and counterclockwise opening directions on its side wall, and the number of tongue holes in each row is evenly distributed along the circumference of the distribution cap body.

3. The gas distribution device for the organic sulfur hydrolysis tower according to claim 1 or 2, characterized in that: The tongue hole is inclined outward at an angle of 15° to 60° to the wall surface of the distribution cap body. The inclination directions of the tongue hole in the clockwise opening direction and the tongue hole in the counterclockwise opening direction are respectively along the clockwise and counterclockwise tangential directions.

4. The gas distribution device for the organic sulfur hydrolysis tower according to claim 3, characterized in that: The primary distributor is fixedly installed on the tower wall of the organic sulfur hydrolysis tower by a support. The support is bolted or welded to the tower wall of the hydrolysis tower. The cylindrical tongue-shaped distribution cap is welded to the primary distributor at the connection point.

5. The gas distribution device for the organic sulfur hydrolysis tower according to claim 4, characterized in that: The primary distributor includes a main pipe, multiple branch pipes, and multiple sub-branch pipes. The branch pipes are vertically connected to the main pipe, and the sub-branch pipes are vertically connected to the sub-branch pipes. The bottom of the cylindrical tongue-shaped distribution cap is connected to each sub-branch pipe in a corresponding manner.

6. The gas distribution device for the organic sulfur hydrolysis tower according to claim 3, characterized in that: The wall thickness of the distribution cap cylinder is 3mm to 10mm, and the tongue hole is a rectangular hole with a diameter of (5 to 20mm) × (15 to 30mm). The tongue holes in adjacent rows are staggered.

7. The gas distribution device for the organic sulfur hydrolysis tower according to claim 3, characterized in that: The height of the cylindrical tongue-shaped distribution cap is 50mm to 300mm, and the diameter is 30mm to 150mm. Multiple cylindrical tongue-shaped distribution caps are evenly arranged along the extension direction of the primary distributor.

8. The gas distribution device for the organic sulfur hydrolysis tower according to claim 5, characterized in that: A flow regulating valve is provided at the connection between the primary distributor and the air intake pipe. The diameter of the air intake pipe is adapted to the diameter of the main pipe of the primary distributor, with an adaptation ratio of 1:1 to 1.5:

1.

9. An organic sulfur hydrolysis tower, characterized in that: The gas distribution device includes any one of claims 1 to 8, wherein the gas distribution device is disposed below the catalyst bed in the hydrolysis tower, and the distance between the top of the gas distribution device and the catalyst bed is H, wherein H is 300 mm to 1000 mm.

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