Purification tower for carbon dioxide production

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a purifying tower for carbon dioxide production, which comprises a tank body and an adsorbent module. An access hole with a cabin door is formed in the side wall of the tank body. A mounting frame of the adsorbent module is in sliding connection with the tank body and can enter and exit from the adsorption cavity through the access hole, a plurality of layers of supporting plates are arranged on the frame, and an adsorbent storage box can be placed on each layer. After impurity-containing carbon dioxide gas enters the adsorption cavity, the adsorbent adsorbs the impurities to purify carbon dioxide, such as activated carbon and a molecular sieve. The adsorbent needs to be replaced after being used for a period of time, a cabin door is opened to slide out the mounting rack, the adsorbent storage box is conveniently replaced or the adsorbent is treated, and the mounting rack slides in to continue working after completion. The design does not need complex disassembly, shortens the maintenance time, and improves the maintenance and production efficiency. In addition, the layout of multiple layers of supporting plates makes full use of space, the adsorbent loading capacity is increased, different adsorbents are convenient to manage and replace, and the purification capacity is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and more specifically, to a purification tower for carbon dioxide production. Background Technology

[0002] Carbon dioxide is one of the major greenhouse gases. As a major emitter of carbon dioxide, the coal chemical industry can help reduce carbon emissions, achieve low-carbon development, and address the challenges of climate change by utilizing the carbon dioxide in its tail gas. Carbon dioxide emitted during coal chemical production not only contributes to the greenhouse effect but can also impact the local environment, such as causing acid rain. Utilizing carbon dioxide can reduce its pollution and improve environmental quality. Carbon dioxide in coal chemical tail gas is a potential resource; recycling it can improve resource utilization and reduce waste. For example, carbon dioxide can be used to produce chemical products and fuels, achieving resource recycling. Currently, the pressure swing adsorption (PSA) method is commonly used to produce high-purity carbon dioxide from coal chemical tail gas. The PSA process is relatively simple, mainly including adsorption, pressure equalization and depressurization, forward release, vacuuming, pressure equalization and pressurization, and final pressurization, making it easy to operate and control. This method can obtain high-purity carbon dioxide products, typically exceeding 98.5%, and even reaching 99.5% to 99.99% in some applications, meeting the high purity requirements of food-grade and other applications.

[0003] After multi-stage pressure swing adsorption (PSA), to further improve the purity of carbon dioxide, the gas to be treated is passed into a purification tower equipped with activated carbon and molecular sieves for further purification. Activated carbon has a highly developed pore structure and a large specific surface area, which can effectively adsorb impurities in carbon dioxide, such as sulfides, nitrogen oxides, organic matter, and dust. Molecular sieves have specific pore sizes and structures, enabling selective adsorption based on molecule size and polarity. In carbon dioxide purification, molecular sieves can selectively adsorb impurities such as moisture, sulfides, and nitrogen oxides while allowing carbon dioxide molecules to pass through, thereby improving the purity of carbon dioxide. After a certain number of operating cycles, the activated carbon and molecular sieves inside the purification tower need to be replaced. Currently, replacing activated carbon and molecular sieves requires a 5-10 hour shutdown for maintenance, resulting in a long maintenance cycle and reduced production efficiency. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a purification tower for carbon dioxide production, which facilitates the periodic replacement of activated carbon and molecular sieves, reduces maintenance cycles, and improves production efficiency.

[0005] A purification tower for carbon dioxide production according to an embodiment of the present invention includes:

[0006] The tank body has an adsorption chamber inside, and an inspection port is provided on the side wall of the tank body. A hatch is provided on the inspection port.

[0007] The adsorbent module is equipped with a mounting frame that is slidably connected to the tank. The mounting frame can enter the adsorption chamber through the inspection port. The mounting frame is equipped with multiple support plates, and each support plate can hold an adsorbent storage box.

[0008] According to some embodiments of the present invention, the adsorbent storage box includes a shell and an end plate, and the shell and the end plate are detachably connected together by fastening bolts.

[0009] According to some embodiments of this utility model, air holes are provided at the bottom of the housing and on the end plate.

[0010] According to some embodiments of the present invention, the pores are arranged in a honeycomb pattern on the surfaces of the housing and the end plate.

[0011] According to some embodiments of the present invention, the lower end of the tank is provided with a funnel-shaped structure.

[0012] According to some embodiments of the present invention, the bottom of the mounting bracket is provided with sliding grooves on both sides, and the tank body is provided with guide strips corresponding to the sliding grooves.

[0013] According to some embodiments of this utility model, handles are provided on both sides of the mounting bracket.

[0014] According to some embodiments of the present invention, a sealing strip is provided on the side of the hatch near the tank body.

[0015] According to some embodiments of the present invention, an exhaust pipe is provided at the upper end of the tank body, and an air inlet pipe is provided at the lower end of the tank body. The air inlet pipe and the exhaust pipe are respectively located on both sides of the axial direction of the tank body.

[0016] According to some embodiments of the present invention, an intake valve is provided on the intake pipe, and an exhaust valve is provided on the exhaust pipe.

[0017] A purification tower for carbon dioxide production according to an embodiment of the present invention has at least the following beneficial effects:

[0018] According to the present invention, a purification tower for carbon dioxide production includes a tank and an adsorbent module. The tank contains an adsorption chamber, and the side wall of the tank has an inspection port. The adsorbent module has a mounting frame, which is slidably connected to the tank. The mounting frame can enter the adsorption chamber through the inspection port. The mounting frame has multiple support plates, each capable of holding an adsorbent storage box. Carbon dioxide gas containing impurities enters the adsorption chamber within the tank. The adsorbent storage box is placed on the multiple support plates of the mounting frame, located within the adsorption chamber. The adsorbent utilizes its own properties to adsorb impurities in the carbon dioxide gas. For example, activated carbon, with its highly developed pore structure and large specific surface area, adsorbs dust such as sulfides, nitrogen oxides, and organic matter; molecular sieves, based on their specific pore size and structure, selectively adsorb gaseous impurities such as moisture, sulfides, and nitrogen oxides according to molecular size and polarity, allowing carbon dioxide molecules to pass through, thereby purifying the carbon dioxide. After a period of use, the adsorbent's adsorption capacity decreases, requiring replacement. At this point, due to the sliding connection between the mounting bracket and the tank, the mounting bracket can be slid out of the adsorption chamber through the inspection port on the side wall of the tank. The inspection port provides a passage for easy access of the mounting bracket. After the mounting bracket slides out, it facilitates operation of the adsorbent storage box placed on the support plate of the mounting bracket. The adsorbent storage box can be directly replaced or the adsorbent can be treated. After completion, the mounting bracket can be slid back into the adsorption chamber through the inspection port to continue operation. The inspection port and the sliding mounting bracket allow the entire mounting bracket to be moved out of the adsorption chamber without a complex disassembly process when the adsorbent needs to be replaced or maintained, significantly shortening maintenance time. Compared to traditional methods that may require long downtime and complete disassembly of the equipment to replace the adsorbent, this design greatly improves maintenance efficiency, reduces production downtime caused by maintenance, and thus improves production efficiency. The mounting bracket has multiple support plates, each capable of holding one adsorbent storage box. This layout fully utilizes the space within the adsorption chamber, increasing the adsorbent loading capacity and thus improving the purification capacity for carbon dioxide gas. At the same time, layered placement also facilitates the management and replacement of different types or batches of adsorbents, and allows for flexible adjustment of the combination and order of use of adsorbents according to actual conditions. Attached Figure Description

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

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the present invention.

[0022] Figure 4This is a schematic diagram of the adsorbent module of this utility model.

[0023] In the picture:

[0024] 100-Tank body, 101-Adsorption chamber, 110-Inspection port, 120-Hatch door, 121-Sealing strip, 130-Funnel-shaped structure, 140-Guide strip, 150-Exhaust pipe, 151-Exhaust valve, 160-Inlet pipe, 161-Inlet valve

[0025] 200-Adsorbent module, 210-Mounting bracket, 211-Support plate, 212-Slide groove, 213-Handle, 220-Adsorbent storage box, 221-Housing shell, 222-End plate, 223-Fasting bolt, 224-Air hole. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 4As shown, this utility model discloses a purification tower for carbon dioxide production, which includes a tank 100 and an adsorbent module 200. The tank 100 contains an adsorption chamber 101, and its side wall has an inspection port 110 with a hatch 120. The adsorbent module 200 has a mounting frame 210, which is slidably connected to the tank 100. The mounting frame 210 can enter the adsorption chamber 101 through the inspection port 110. The mounting frame 210 has multiple support plates 211, each capable of holding an adsorbent storage box 220. Specifically, in this embodiment, the tank 100 contains an adsorption chamber 101, and its side wall has an inspection port 110 with a hatch 120 installed on it. The adsorbent module 200 is equipped with a mounting bracket 210, which is slidably connected to the tank 100, allowing the mounting bracket 210 to be easily inserted into the adsorption chamber 101 through the inspection port 110. Furthermore, the mounting bracket 210 is provided with multiple support plates 211, each of which is used to hold an adsorbent storage box 220.

[0031] In this embodiment, during the carbon dioxide purification process, carbon dioxide gas containing impurities enters the adsorption chamber 101 within the tank 100. At this time, the adsorbent storage box 220, placed on the multi-layer support plate 211 of the mounting frame 210 and located within the adsorption chamber 101, begins to function. The adsorbent adsorbs impurities in the carbon dioxide gas based on its unique properties. For example, activated carbon, relying on its highly developed pore structure and large specific surface area, can effectively adsorb dust such as sulfides, nitrogen oxides, and organic matter; molecular sieves, based on their specific pore size and structure, selectively adsorb gaseous impurities such as moisture, sulfides, and nitrogen oxides according to molecular size and polarity, allowing carbon dioxide molecules to pass through smoothly, thereby achieving the purpose of purifying carbon dioxide.

[0032] However, after a period of use, the adsorption capacity of the adsorbent gradually decreases, at which point it needs to be replaced. Since the mounting bracket 210 and the tank 100 are slidably connected, in this case, simply opening the hatch 120 on the inspection port 110 to provide a passage for the mounting bracket 210 allows it to slide out of the adsorption chamber 101 through the inspection port 110 on the side wall of the tank 100. After the mounting bracket 210 slides out, operators can easily operate the adsorbent storage box 220 placed on the support plate 211 on the mounting bracket 210, either by directly replacing the adsorbent storage box 220 or by performing appropriate treatment on the adsorbent. After completing these operations, the mounting bracket 210 is then slid back into the adsorption chamber 101 through the inspection port 110, allowing it to continue operating.

[0033] In this embodiment, on the one hand, the inclusion of an inspection port 110 and a slidably connected mounting bracket 210 allows the mounting bracket 210 to be moved entirely out of the adsorption chamber 101 when the adsorbent needs to be replaced or maintained, unlike traditional methods which require extensive disassembly of the equipment. This significantly shortens maintenance time, greatly improves maintenance efficiency, effectively reduces production downtime caused by maintenance, and thus enhances production efficiency. On the other hand, the mounting bracket 210 is equipped with multiple support plates 211, each capable of holding an adsorbent storage box 220. This layout fully utilizes the space within the adsorption chamber 101, increasing the adsorbent loading capacity and enhancing the purification capacity for carbon dioxide gas. Furthermore, the layered placement facilitates the management and replacement of different types or batches of adsorbents by staff, allowing for flexible adjustments to the combination and usage sequence of adsorbents according to actual conditions.

[0034] In some embodiments of this utility model, the adsorbent storage box 220 includes a shell 221 and an end plate 222, which are detachably connected together by fastening bolts 223. Specifically, in this embodiment, the adsorbent storage box 220 is composed of a shell 221 and an end plate 222. During the adsorption process, the adsorbent is placed inside the shell 221. When carbon dioxide gas flows through the adsorbent storage box 220, the adsorbent inside the shell 221, such as activated carbon or molecular sieves, plays a role in adsorbing impurities in the carbon dioxide gas according to their respective characteristics, thereby purifying the carbon dioxide. When the adsorbent's adsorption capacity decreases after a period of use and needs to be replaced, the shell 221 and end plate 222 are detachably connected by fastening bolts 223. Operators can easily unscrew the bolts 223 to separate the end plate 222 from the shell 221, allowing for easy removal of the degraded adsorbent and replacement with new adsorbent. The end plate 222 is then reconnected to the shell 221 using the fastening bolts 223, enabling the adsorbent storage box 220 to continue operation. The detachable connection between the shell 221 and end plate 222 using fastening bolts 223 greatly facilitates adsorbent replacement, saving significant time and labor costs.

[0035] In some embodiments of this invention, vents 224 are provided on the bottom of the housing 221 and the end plate 222. Specifically, in this embodiment, the design of the vents 224 on the bottom of the housing 221 and the end plate 222 allows the carbon dioxide gas entering the adsorbent collection box 220 to be more evenly distributed around the adsorbent. The gas enters and exits through multiple vents 224, avoiding localized poor gas flow or insufficient adsorption, greatly increasing the contact area and contact time between the gas and the adsorbent, thereby improving adsorption efficiency and enhancing the purification effect on carbon dioxide gas.

[0036] In some embodiments of this invention, the pores 224 are arranged in a honeycomb pattern on the surfaces of the housing 221 and the end plate 222. Specifically, in this embodiment, the honeycomb structure itself has high structural strength, ensuring a sufficient number of pores 224 to achieve good air permeability while maintaining the structural stability of the housing 221 and the end plate 222. This means that the adsorbent storage box 220 is not easily deformed or damaged when subjected to gas pressure and various forces during the adsorption process over a long period of time, ensuring reliability and durability.

[0037] In some embodiments of this utility model, a funnel-shaped structure 130 is provided at the lower end of the tank 100. Specifically, in this embodiment, a funnel-shaped structure 130 is provided at the lower end of the tank 100, and a slag discharge port is provided on the funnel-shaped structure 130. When cleaning and maintenance are required inside the tank 100, the funnel-shaped structure 130 helps to concentrate the impurities and waste deposited at the bottom into a smaller area, making it easier for workers to perform cleaning operations.

[0038] In some embodiments of this utility model, the mounting bracket 210 has sliding grooves 212 on both sides of its bottom, and the tank body 100 has guide bars 140 corresponding to the sliding grooves 212. Specifically, in this embodiment, the sliding grooves 212 on both sides of the bottom of the mounting bracket 210 and the corresponding guide bars 140 on the tank body 100 cooperate to function. When the adsorbent needs to be replaced or maintained, the operator opens the hatch 120 of the inspection port 110 on the side wall of the tank body 100. Since the mounting bracket 210 has sliding grooves 212 on both sides of its bottom, and the tank body 100 has guide bars 140 at the corresponding positions, the guide bars 140 fit perfectly into the sliding grooves 212. At this time, the operator can smoothly slide the mounting bracket 210 out of the adsorption chamber 101 inside the tank body 100 through the inspection port 110 along the direction determined by the guide bars 140. During the sliding process, the guide bar 140 slides within the groove 212, providing precise guidance for the movement of the mounting frame 210. This ensures that the mounting frame 210 moves accurately along the predetermined path without any deviation or jamming. After the adsorbent replacement or maintenance is completed, the operator can use the same guiding principle to precisely slide the mounting frame 210 back to its original position within the adsorption chamber along the guide bar 140, restoring the mounting frame 210 to its normal working state and ensuring that the adsorbent continues to purify carbon dioxide gas.

[0039] In some embodiments of this utility model, handles 213 are provided on both sides of the mounting bracket 210. Specifically, in this embodiment, the handles 213 greatly facilitate the operation of the mounting bracket 210 by the operator. When moving the mounting bracket 210, the operator can apply force more effectively through the handles 213, making it easier and less strenuous to pull the mounting bracket 210 out of the tank 100 or push it back.

[0040] In some embodiments of this invention, a sealing strip 121 is provided on the side of the hatch 120 near the tank 100. Specifically, in this embodiment, carbon dioxide gas is purified under a certain pressure inside the purification tower. The sealing strip 121, through its own compression deformation, is tightly pressed between the tank 100 and the hatch 120, forming an effective airtight barrier. Even under pressure fluctuations inside the tower, the sealing strip 121 can maintain a sealed state due to its elasticity, ensuring that the carbon dioxide gas is confined inside the tank 100, guaranteeing the normal operation of the purification process, and preventing gas leakage from causing harm to the environment and operators.

[0041] In some embodiments of this invention, an exhaust pipe 150 is provided at the upper end of the tank 100, and an inlet pipe 160 is provided at the lower end of the tank 100. The inlet pipe 160 and the exhaust pipe 150 are located on opposite sides of the axial direction of the tank 100. Specifically, in this embodiment, carbon dioxide gas containing impurities enters through the inlet pipe 160 at the lower end of the tank 100. Since the inlet pipe 160 is located at the lower end of the tank 100 and on one side of the axial direction, the gas flows into the tank 100 at a lower position and in a specific direction after entering, forming an upward flow trend. During the upward flow, the gas comes into full contact with the adsorbent in the tank 100, and the impurities are gradually removed, achieving purification of carbon dioxide. The purified carbon dioxide gas rises to the upper end of the tank 100, at which point the exhaust pipe 150, located on the other side of the upper end of the tank 100, begins to function. The purified gas is discharged from the exhaust pipe 150 and flows to subsequent processing or storage stages. The arrangement of the intake pipe 160 and the exhaust pipe 150 on both sides of the axial direction creates a more reasonable flow path for the gas within the tank 100, ensuring that the gas has sufficient residence time within the tank 100 and can fully function with the purification device, thereby improving purification efficiency and quality.

[0042] In some embodiments of this utility model, an inlet valve 161 is provided on the inlet pipe 160, and an exhaust valve 151 is provided on the exhaust pipe 150. Specifically, in this embodiment, during the daily operation of the carbon dioxide purification tower, the inlet valve 161 on the inlet pipe 160 and the exhaust valve 151 on the exhaust pipe 150 are in the normally open state. The inlet valve 161 controls the flow rate and speed of carbon dioxide gas containing impurities entering the tank 100, ensuring that an appropriate amount of gas can stably flow into the tank 100 for purification; the exhaust valve 151 is responsible for timely discharge of purified carbon dioxide gas, maintaining the dynamic balance of gas in the tank 100, and ensuring the continuous progress of the purification process. When the adsorbent needs to be replaced, the operator first closes the inlet valve 161. After the inlet valve 161 is closed, the channel for carbon dioxide gas containing impurities to enter the tank 100 is cut off, preventing new gas from entering the tank 100 during the adsorbent replacement process, interfering with the operation or causing harm to the personnel. Next, the exhaust valve 151 is closed. After the exhaust valve 151 is closed, the gas inside the tank 100 cannot be discharged, maintaining a relatively closed state inside the tank 100. In this way, a relatively independent and stable space is formed inside the tank 100, which not only prevents the entry of external gas, but also prevents the leakage of residual gas inside the tank 100, creating favorable conditions for the staff to safely and smoothly replace the adsorbent.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A purification tower for carbon dioxide production, characterized in that, include: Tank (100), wherein an adsorption chamber (101) is provided inside the tank (100), and an inspection port (110) is provided on the side wall of the tank (100), and a hatch (120) is provided on the inspection port (110). The adsorbent module (200) is provided with a mounting frame (210), which is slidably connected to the tank (100). The mounting frame (210) can enter the adsorption chamber (101) through the inspection port (110). The mounting frame (210) is provided with multiple support plates (211), and each support plate (211) can hold an adsorbent storage box (220).

2. The purification tower for carbon dioxide production according to claim 1, characterized in that, The adsorbent storage box (220) includes a shell (221) and an end plate (222), which are detachably connected together by fastening bolts (223).

3. The purification tower for carbon dioxide production according to claim 2, characterized in that, Air holes (224) are provided on the bottom of the housing (221) and on the end plate (222).

4. The purification tower for carbon dioxide production according to claim 3, characterized in that, The pores (224) are arranged in a honeycomb pattern on the surface of the housing (221) and the end plate (222).

5. The purification tower for carbon dioxide production according to claim 1, characterized in that, The lower end of the tank (100) is provided with a funnel-shaped structure (130).

6. The purification tower for carbon dioxide production according to claim 1, characterized in that, The mounting bracket (210) has sliding grooves (212) on both sides of its bottom, and the tank (100) has guide strips (140) corresponding to the sliding grooves (212).

7. The purification tower for carbon dioxide production according to claim 6, characterized in that, The mounting bracket (210) is provided with handles (213) on both sides.

8. The purification tower for carbon dioxide production according to claim 1, characterized in that, A sealing strip (121) is provided on the side of the hatch (120) near the tank body (100).

9. The purification tower for carbon dioxide production according to claim 1, characterized in that, The upper end of the tank (100) is provided with an exhaust pipe (150), and the lower end of the tank (100) is provided with an air inlet pipe (160). The air inlet pipe (160) and the exhaust pipe (150) are respectively located on both sides of the axial direction of the tank (100).

10. The purification tower for carbon dioxide production according to claim 9, characterized in that, An intake valve (161) is provided on the intake pipe (160), and an exhaust valve (151) is provided on the exhaust pipe (150).

Images