Carbon dioxide adsorption medium regeneration treatment device

Abstract

The utility model belongs to the technical field of carbon dioxide capture, and particularly relates to a carbon dioxide adsorption medium regeneration treatment device which is characterized by comprising a shell, a medium unit and a lifting driver, the medium unit is composed of an upper independent ventilation chamber and a lower independent ventilation chamber, and carbon dioxide adsorption media are contained in the ventilation chambers; the lifting driver is vertically arranged between the shell and the medium unit; three stations as high as the breathable bins are continuously formed in the shell from top to bottom, the medium unit ascends and descends among the three stations according to different working processes, the breathable bin located in the middle station is always located at a carbon dioxide adsorption station, and the upper station and the lower station are alternately located at a carbon dioxide desorption station. Compared with the prior art, the carbon dioxide adsorption device has the beneficial effects that along with the ascending and descending of the medium unit, the switching on different stations is realized, and the production efficiency of carbon dioxide adsorption is greatly improved; the method is especially suitable for application occasions with small flow.

Description

Technical Field

[0001] This utility model belongs to the field of carbon dioxide capture technology, and in particular relates to a carbon dioxide adsorption medium regeneration treatment device. Background Technology

[0002] Rising carbon dioxide concentrations lead to poorer heat dissipation on Earth, resulting in higher temperatures, the greenhouse effect, and numerous natural disasters worldwide, posing a serious threat to human survival. Current industrial iron and steel production processes generate large amounts of carbon dioxide, which is directly emitted into the atmosphere as waste gas. This not only causes enormous damage to the ecological environment and contributes to the greenhouse effect but also wastes carbon dioxide resources.

[0003] To ensure the green recycling and reuse of carbon dioxide in industrial waste gas and reduce its environmental impact, carbon dioxide capture processes are often required. The most common, environmentally friendly, and efficient carbon dioxide capture, absorption, and reuse methods generally employ chemical absorption. This involves a chemical reaction where carbon dioxide in the flue gas comes into contact with an alkaline absorption solution to form an unstable salt. Under certain conditions, the salt can decompose in reverse to release carbon dioxide and regenerate. Chemical absorption is fast and has a high degree of gas purification. It can selectively absorb carbon dioxide under low concentration and low pressure conditions, and no pressurization is required. Common chemical absorption methods are generally divided into monoethanolamine absorption and ammonia absorption.

[0004] Molecular sieves are synthetically produced hydrated aluminosilicates (zeolites) or natural zeolites that sieve molecules. They come in various types, including 3A (potassium A type), 4A (sodium A type), 5A (calcium A type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type), and sodium mordenite zeolite. They possess high adsorption capacity, strong selectivity, and high temperature resistance. They are widely used in organic and petrochemical industries and are also excellent adsorbents for coal gas dehydration. Molecular sieves are also receiving increasing attention in the purification of carbon dioxide waste gas.

[0005] Chinese utility model application No. 202322587567.0 discloses a carbon dioxide capture device for molecular sieve regeneration gas. The device includes a compressed air pipeline connected to an air-cooled tower, the outlet of which is connected to a molecular sieve adsorption unit. The molecular sieve adsorption unit is connected to a purified air pipeline. The inlet of the molecular sieve adsorption unit is connected to a vacuum pump for molecular sieve regeneration. A carbon dioxide capture unit is located at the end of the vacuum pump. A regeneration gas drying section is located between the inlet of the molecular sieve adsorption unit and the vacuum pump. This design uses two molecular sieve adsorbers in reverse operation, one for adsorption and the other for desorption. Its drawbacks are high equipment investment and unsuitability for applications with low flow rates.

[0006] Chinese utility model application No. 201020187080.3 discloses a carbon dioxide regeneration tower, which has a gas-lifting cap inside the outer shell and a boiling device connected to the outside. In use, the gas-lifting cap inside the outer shell and the boiling device connected to the outside are electrically heated. After the rich liquid desorbs carbon dioxide through the packing layer, it flows into the boiling device, where it is forcibly heated to 110°C to desorb the remaining carbon dioxide. The drawback of this design is that adsorption cannot occur simultaneously during packing desorption; it can only operate intermittently, affecting operational efficiency. Utility Model Content

[0007] The purpose of this invention is to provide a carbon dioxide adsorption medium regeneration treatment device that overcomes the shortcomings of the prior art. By setting a medium unit with two independent ventilated chambers and three workstations inside the shell, the ventilated chamber in the middle workstation performs the adsorption process, while the ventilated chambers in the upper and lower workstations alternately complete the desorption process. As the medium unit rises and falls, the switching between different workstations is realized, achieving continuous operation of adsorption and desorption, saving equipment investment and improving production efficiency.

[0008] To achieve the above objectives, this utility model employs the following technical solution:

[0009] A carbon dioxide adsorption medium regeneration treatment device includes a shell, a medium unit, and a lifting actuator. The medium unit consists of two independent ventilated chambers, with heat-insulating partitions at the top and bottom of each chamber. The ventilated chambers contain carbon dioxide adsorption medium. The bottom of the lifting actuator is vertically mounted on the bottom of the shell, and its piston end is connected to the bottom of the medium unit. Three workstations, at the same height as the ventilated chambers, are continuously formed from top to bottom inside the shell. Depending on the working process, the medium unit moves up and down between the three workstations. The ventilated chamber in the middle workstation is always the carbon dioxide adsorption position, while the upper and lower workstations alternately serve as carbon dioxide desorption positions. Three sealing rings are provided on the outer periphery of the medium unit, overlapping with the layers of the three workstations inside the shell to isolate adjacent workstations.

[0010] Furthermore, a telescopic guide post is provided between the bottom of the medium unit and the bottom of the outer casing.

[0011] Furthermore, the number of telescopic guide columns is 2-3, evenly distributed around the perimeter of the lifting driver.

[0012] Furthermore, the carbon dioxide adsorption medium is a 13X type granular molecular sieve with a diameter of 3-6 mm.

[0013] Furthermore, the outer casing corresponding to the carbon dioxide adsorption site is provided with a maintenance hole, and the maintenance hole is provided with a cover plate.

[0014] Furthermore, the upper part of the side wall of the ventilated chamber is provided with a filling port, and the lower part of the side wall is provided with a discharge port, both of which face the maintenance hole.

[0015] Furthermore, the lifting drive is any one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1) By setting up a medium unit with two independent ventilated chambers and three work stations inside the shell, the ventilated chamber in the middle work station performs the adsorption process, and the ventilated chambers in the upper and lower work stations alternately complete the desorption process. As the medium unit rises and falls, the switching between different work stations is realized, which significantly improves the production efficiency of carbon dioxide adsorption.

[0018] 2) It concentrates the adsorption and desorption of carbon dioxide in one device and can achieve continuous operation, thereby saving investment in equipment assets. It is particularly suitable for applications with small flow rates, such as the pilot or intermediate stage of carbon dioxide recovery projects in the environmental protection field, and has good application value. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 Top view;

[0021] Figure 3 yes Figure 2 Sectional view along line AA;

[0022] Figure 4 yes Figure 2 Sectional view along line BB;

[0023] Figure 5 yes Figure 3 Enlarged view of a portion of section I;

[0024] Figure 6 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0025] In the diagram: 1-outer shell, 2-medium unit, 3-lifting drive, 4-ventilated chamber, 5-insulating partition, 6-carbon dioxide adsorption medium, 7-sealing ring, 8-telescopic guide column, 9-layer plate, 10-cover plate, 11-maintenance hole, 12-filling port, 13-discharge port, 14-mounting support, 15-desorption medium pipeline, 16-flue gas pipeline. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0028] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0029] See Figure 1-6 This is a schematic diagram of an embodiment of the carbon dioxide adsorption medium regeneration treatment device of this utility model. It includes a shell 1, a medium unit 2, and a lifting drive 3. The medium unit 2 consists of two independent ventilated chambers 4, one above the other. The top and bottom of the ventilated chambers 4 are respectively provided with heat insulation partitions 5, and the side walls are surrounded by perforated plates. The heat insulation partitions 5 can be vacuum heat insulation panels, which can effectively avoid heat transfer caused by air convection and significantly reduce the thermal conductivity. Three working positions are continuously formed from top to bottom inside the shell 1, which are at the same height as the ventilated chambers 4. Depending on the working process, the medium unit 2 moves up and down between the three working positions. The ventilated chamber in the middle working position is always the carbon dioxide adsorption position, and the upper and lower working positions alternate as the carbon dioxide desorption positions. The upper and lower limit positions of the lifting drive 3 can realize the alternation of the two desorption working positions.

[0030] The ventilated chamber 4 contains carbon dioxide adsorption medium 6, which is a 13X type granular molecular sieve with a diameter of 3-6 mm. 13X type molecular sieve (also known as 13X type zeolite) is mostly used in gas purification and separation devices to remove water and carbon dioxide. Under the conditions of an adsorption state temperature of 15-35℃ and a gas pressure of 10 kPa, 13X type zeolite has the best CO2 capture capacity in the pressure swing adsorption process.

[0031] The bottom of the lifting actuator 3 is vertically mounted on the bottom of the housing 1, and the piston end of the lifting actuator 3 is connected to the bottom of the media unit 2. Telescopic guide posts 8 are provided between the bottom of the media unit 2 and the bottom of the housing 1. There are three telescopic guide posts 8, evenly distributed around the perimeter of the lifting actuator 3. The telescopic guide posts 8 assist the lifting actuator 3 in providing a more stable guiding effect, thereby making the lifting action of the media unit 2 more stable and controllable. In this embodiment, the lifting actuator 3 can be any of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, and a suitable thrust value is selected according to the weight of the media unit 2 of the device.

[0032] The outer periphery of the media unit 2 is provided with three layers of sealing rings 7. The sealing rings 7 overlap with the shelves 9 of the three workstations inside the outer casing 1, thus isolating adjacent workstations. The sealing rings 7 are silicone sealing rings, which form a sealing band with the shelf 9 through elastic deformation. The silicone sealing rings can withstand high temperatures of 200℃ and can still perform their sealing function at the desorption temperature.

[0033] The outer casing 1 corresponding to the carbon dioxide adsorption position is provided with a maintenance hole 11, and a cover plate 10 is provided on the maintenance hole. The outer casing 1 is also provided with a mounting bracket 14 for connection and fixation to the concrete foundation. The upper part of the side wall of the ventilated chamber 4 is provided with a filling port 12, and the lower part of the side wall is provided with a discharge port 13. Both the filling port 12 and the discharge port 13 face the maintenance hole 11. When it is necessary to replace the carbon dioxide adsorption medium 6, the old carbon dioxide adsorption medium 6 is discharged from the discharge port 13, and the new carbon dioxide adsorption medium 6 is added from the filling port 12.

[0034] In operation, the upper and lower flanges of this invention are first connected to the desorption medium pipeline 15, and the two middle flanges are then connected to the flue gas pipeline 16. The desorption medium can be water vapor, and it must meet the following desorption conditions: temperature 110-130℃, pressure 0.03-0.05MPa. Regulating valves are installed on the upper and lower flanges. These valves are opened alternately according to the location of the medium unit 2, allowing the carbon dioxide adsorption medium 6 at the corresponding desorption station to complete desorption. After desorption, once the temperature of the carbon dioxide adsorption medium 6 at the desorption station drops below 35℃, the lifting drive 3 can be operated to switch, or the switch can be performed automatically after a set time.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carbon dioxide adsorption medium regeneration treatment device, characterized in that, It includes an outer shell, a media unit, and a lifting drive. The media unit consists of two independent ventilated chambers, with heat-insulating partitions at the top and bottom of each ventilated chamber. The interior of the ventilated chamber contains carbon dioxide adsorption media. The bottom of the lifting driver is vertically mounted on the bottom of the housing, and the piston end of the lifting driver is connected to the bottom of the medium unit. The outer shell has three work stations that are at the same height as the ventilation chamber, which are continuously formed from top to bottom. Depending on the working process, the medium unit moves up and down between the three work stations. The ventilation chamber in the middle work station is always the carbon dioxide adsorption site, and the upper and lower work stations are alternate carbon dioxide desorption sites. The outer periphery of the medium unit is provided with three sealing rings, which overlap with the plates of the three workstations inside the outer shell, so that two adjacent workstations are isolated.

2. The carbon dioxide adsorption medium regeneration treatment device according to claim 1, characterized in that, A telescopic guide post is provided between the bottom of the medium unit and the bottom of the outer shell.

3. The carbon dioxide adsorption medium regeneration treatment device according to claim 2, characterized in that, The number of telescopic guide columns is 2-3, which are evenly distributed around the lifting drive.

4. The carbon dioxide adsorption medium regeneration treatment device according to claim 1, characterized in that, The carbon dioxide adsorption medium is a 13X type granular molecular sieve with a diameter of 3-6 mm.

5. The carbon dioxide adsorption medium regeneration treatment device according to claim 1, characterized in that, The outer casing corresponding to the carbon dioxide adsorption site is provided with a maintenance hole, and the maintenance hole is provided with a cover plate.

6. The carbon dioxide adsorption medium regeneration treatment device according to claim 5, characterized in that, The upper part of the side wall of the ventilated chamber is provided with a filling port, and the lower part of the side wall is provided with a discharge port. Both the filling port and the discharge port face the maintenance hole.

7. The carbon dioxide adsorption medium regeneration treatment device according to claim 1, characterized in that, The lifting drive is any one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

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