Adsorption packed tower capable of reducing gas flow resistance
By incorporating a heating mechanism and baffle structure within the gas guide sleeve, the flow path of nitrogen is optimized, thus solving the problem of increased gas flow resistance during the heating process of the packed tower. This achieves low-resistance operation and efficient mass and heat transfer, reducing maintenance difficulty and costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BENGANG STEEL PLATES CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-05
AI Technical Summary
The existing nitrogen purification and refining unit's packed tower is prone to dry burning and agglomeration during the heating process, which increases the gas flow resistance, affects the packing life and the resistance drop required by the process, and increases the difficulty of maintenance and material replacement.
The gas flow path is optimized by using an internal heating mechanism and baffle structure in the gas guide sleeve. This eliminates dry burning and agglomeration, and reduces gas flow resistance.
It effectively reduces the resistance drop in the packed tower, reduces the difficulty of maintenance and material replacement, saves costs, and improves mass and heat transfer efficiency.
Smart Images
Figure CN224194411U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy and gas technology, and in particular to an adsorption packed tower that can reduce gas flow resistance. Background Technology
[0002] High-purity nitrogen is used as a protective gas in cold-rolled galvanizing production, and its oxygen content and dew point are particularly important. Currently, the oxygen content can reach less than 5 ppm, but the dew point is still between -40 and -55°C, failing to meet the requirement of less than -60°C. The nitrogen purification and refining process involves using hydrogenation deoxygenation technology to remove trace amounts of oxygen from air separation nitrogen, followed by deep drying to remove moisture, ultimately yielding high-purity refined nitrogen with an oxygen content of less than 5 ppm and a dew point less than -60°C, which is used as a protective gas in cold-rolled galvanizing production. Existing nitrogen purification and refining units use a dual-tower process, with one tower operating while the other regenerates, switching every 24 hours to achieve continuous operation. During regeneration, the packing needs to be heated, with the heating temperature controlled between 280 and 360°C, which is impossible for ordinary steam heat exchangers. The design uses DN15 sleeve electric heating rods installed inside the packing tower. Each packing tower is equipped with 24 DN8*2000mm 1000W electric heating rods according to the heating temperature, and the heating temperature for regeneration is controlled by silicon controlled rectifiers.
[0003] During use, it was found that the packing temperature near the heating rod area was high, which easily led to dry burning and agglomeration, affecting the service life and function of the packing. At the same time, the large size of the internal heating sleeve affected the gas flow and increased the resistance drop in the packed tower. The process requires the resistance drop to be less than 0.1MPa, but in reality it can reach 0.3MPa, which increases the difficulty of maintenance and material replacement. Utility Model Content
[0004] In view of the above-mentioned technical problems, an adsorption packed tower that can reduce gas flow resistance is provided.
[0005] The technical means adopted in this utility model are as follows:
[0006] An adsorption packed tower for reducing gas flow resistance includes a tower body, a gas guide sleeve, and a heating mechanism. The axial direction of the tower body is consistent with the vertical direction. A reaction chamber is coaxially formed inside the tower body. A product gas outlet is formed on the top wall of the tower body. The gas guide sleeve is coaxially and penetrates the top wall of the tower body. The top end of the gas guide sleeve is located outside the tower body, and the bottom end of the gas guide sleeve is located inside the reaction chamber. A raw material gas inlet is formed on the portion of the gas guide sleeve located outside the tower body. An outlet channel is formed between the outer side of the gas guide sleeve and the side of the reaction chamber. The bottom end of the outlet channel is connected to the bottom end of the gas guide sleeve. The heating mechanism is fixedly installed inside the gas guide sleeve.
[0007] Furthermore, the heating mechanism includes several inner heating sleeves, all of which are evenly distributed along the circumferential direction of the gas guide sleeve and are fixedly installed inside the gas guide sleeve; each inner heating sleeve includes a heat-conducting pipe and an electric heating rod, the axial direction of the heat-conducting pipe is consistent with the axial direction of the gas guide sleeve, the heat-conducting pipe is fixedly installed inside the gas guide sleeve, and the electric heating rod is coaxial and fixedly installed inside the heat-conducting pipe.
[0008] Furthermore, it also includes several left-side baffles and several right-side baffles. All the left-side baffles are evenly distributed along the axial direction of the gas guide sleeve and are fixedly installed on the left side of the inner side of the gas guide sleeve. All the right-side baffles are evenly distributed along the axial direction of the gas guide sleeve and are fixedly installed on the right side of the inner side of the gas guide sleeve. All the left-side baffles and all the right-side baffles are arranged alternately along the axial direction of the gas guide sleeve. The axial direction of the left-side baffles and the axial direction of the right-side baffles are both consistent with the left-right direction. The heat pipe passes through and is fixedly installed on the left-side baffles and the right-side baffles.
[0009] Furthermore, the heat pipe is made of stainless steel.
[0010] This utility model has the following advantages:
[0011] 1. In this utility model, the nitrogen gas heated by the heating mechanism inside the gas guide sleeve enters the gas outlet channel through the bottom end of the gas guide sleeve, and is then output to the outside of the tower through the product gas outlet. Since the flow of nitrogen gas in the gas outlet channel is not affected, the resistance drop inside the tower can be less than the process requirement of 0.1MPa, thereby reducing the difficulty of maintenance and material replacement, and thus saving a lot of costs.
[0012] 2. In this utility model, the left and right baffles optimize the flow path of nitrogen in the gas guide sleeve, significantly improving the residence time, contact area and turbulence of nitrogen in the gas guide sleeve, thereby improving the mass transfer and heat transfer efficiency of this utility model. Attached Figure Description
[0013] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is an overall structural diagram of an adsorption packed tower that can reduce gas flow resistance according to this utility model.
[0015] Attached reference numerals: 1-Gas guide sleeve; 2-Product gas outlet; 3-Tower body; 4-Right side baffle; 5-Reaction chamber; 6-Left side baffle; 7-Heating mechanism; 8-Raw material gas inlet. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0017] Example 1:
[0018] like Figure 1 As shown, an adsorption packed tower that can reduce gas flow resistance includes a tower body 3, a gas guide sleeve 1, and a heating mechanism 7. The axial direction of the tower body 3 is consistent with the vertical direction. A reaction chamber 5 is coaxially formed inside the tower body 3. A product gas outlet 2 is formed on the top wall of the tower body 3. The gas guide sleeve 1 is coaxially and through-mounted on the top wall of the tower body 3. The top end of the gas guide sleeve 1 is located outside the tower body 3, and the bottom end of the gas guide sleeve 1 is located inside the reaction chamber 5. A raw material gas inlet 8 is formed on the part of the gas guide sleeve 1 located outside the tower body 3. An outlet channel is formed between the outer side of the gas guide sleeve 1 and the side of the reaction chamber 5. The bottom end of the outlet channel is connected to the bottom end of the gas guide sleeve 1. The heating mechanism 7 is fixedly installed inside the gas guide sleeve 1.
[0019] Specifically, the nominal diameter of the air guide sleeve 1 is 300mm, and the air outlet channel is an annular structure with the axial direction and the vertical direction aligned.
[0020] In this embodiment, the heating mechanism 7 includes several inner heating sleeves, all of which are evenly distributed along the circumferential direction of the gas guide sleeve 1 and are fixedly installed inside the gas guide sleeve 1; the inner heating sleeve includes a heat-conducting pipe and an electric heating rod, the axial direction of the heat-conducting pipe is consistent with the axial direction of the gas guide sleeve 1, the heat-conducting pipe is fixedly installed inside the gas guide sleeve 1, and the electric heating rod is coaxial and fixedly installed inside the heat-conducting pipe.
[0021] Specifically, the inner heating sleeve is provided with 12 tubes, the nominal diameter of the electric heating rod is 16mm, the length of the electric heating rod is 2000mm, and the power of the electric heating rod is 2000W.
[0022] In this embodiment, a plurality of left-side baffles 6 and a plurality of right-side baffles 4 are also included. All the left-side baffles 6 are evenly distributed along the axial direction of the gas guide sleeve 1 and are fixedly installed on the left side of the inner side of the gas guide sleeve 1. All the right-side baffles 4 are evenly distributed along the axial direction of the gas guide sleeve 1 and are fixedly installed on the right side of the inner side of the gas guide sleeve 1. All the left-side baffles 6 and all the right-side baffles 4 are arranged alternately along the axial direction of the gas guide sleeve 1. The axial direction of the left-side baffles 6 and the axial direction of the right-side baffles 4 are both consistent with the left-right direction. The heat pipe passes through and is fixedly installed on the left-side baffles 6 and the right-side baffles 4.
[0023] In this embodiment, the heat pipe is made of stainless steel.
[0024] Since this embodiment eliminates the phenomenon of dry burning of the packing, the resistance drop in the tower body 3 is reduced, the difficulty of maintenance and material replacement is reduced, and thus a lot of costs are saved.
[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An adsorption packed tower that can reduce gas flow resistance, characterized in that, It includes a tower body (3), a gas guide sleeve (1), and a heating mechanism (7); The axial direction of the tower body (3) is consistent with the vertical direction. A reaction chamber (5) is coaxially opened inside the tower body (3). A product gas outlet (2) is opened on the top wall of the tower body (3). The gas guide sleeve (1) is coaxially and through installed on the top wall of the tower body (3). The top end of the gas guide sleeve (1) is located outside the tower body (3). The bottom end of the gas guide sleeve (1) is located inside the reaction chamber (5). A raw material gas inlet (8) is opened on the part of the gas guide sleeve (1) located outside the tower body (3). An outlet channel is formed between the outer side of the gas guide sleeve (1) and the side of the reaction chamber (5). The bottom end of the outlet channel is connected to the bottom end of the gas guide sleeve (1). The heating mechanism (7) is fixedly installed inside the gas guide sleeve (1).
2. The adsorption packed tower with reduced gas flow resistance according to claim 1, characterized in that, The heating mechanism (7) includes several inner heating sleeves, all of which are evenly distributed along the circumferential direction of the air guide sleeve (1) and fixedly installed inside the air guide sleeve (1). The inner heating sleeve includes a heat-conducting pipe and an electric heating rod. The axial direction of the heat-conducting pipe is consistent with the axial direction of the gas-conducting sleeve (1). The heat-conducting pipe is fixedly installed inside the gas-conducting sleeve (1), and the electric heating rod is coaxial and fixedly installed inside the heat-conducting pipe.
3. An adsorption packed tower for reducing gas flow resistance according to claim 2, characterized in that, It also includes several left-side baffles (6) and several right-side baffles (4). All the left-side baffles (6) are evenly distributed along the axial direction of the gas guide sleeve (1) and fixedly installed on the left side of the inner side of the gas guide sleeve (1). All the right-side baffles (4) are evenly distributed along the axial direction of the gas guide sleeve (1) and fixedly installed on the right side of the inner side of the gas guide sleeve (1). All the left-side baffles (6) and all the right-side baffles (4) are arranged alternately along the axial direction of the gas guide sleeve (1). The axial direction of the left baffle (6) and the axial direction of the right baffle (4) are both consistent with the left and right directions. The heat pipe passes through and is fixedly installed on the left baffle (6) and the right baffle (4).
4. An adsorption packed tower for reducing gas flow resistance according to claim 2, characterized in that, The heat pipe is made of stainless steel.