Energy-saving carbon dioxide capture separation tower

Abstract

The utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide separation tower technology, and in particular to an energy-saving carbon dioxide capture and separation tower. Background Technology

[0002] Carbon dioxide capture and separation towers are core equipment in the carbon capture, utilization and storage technology system. They are mainly used to separate and concentrate carbon dioxide from flue gas from industries such as coal / gas-fired power plants, steel plants, cement plants, and chemical plants. Their core objective is to efficiently and economically separate low-concentration CO, usually between 4% and 20%, from mixed gases to obtain a high-purity CO stream for subsequent transportation, utilization or storage.

[0003] Before entering the absorption tower, flue gas needs to undergo pretreatment such as cooling, dust removal, desulfurization, and denitrification to protect the absorbent, improve efficiency, and reduce equipment corrosion. The pretreated flue gas enters from the bottom of the absorption tower and flows upwards, undergoing spraying within the tower. This allows for thorough counter-current contact between the gas and liquid phases. However, the flue gas often has a short residence time, necessitating a large flow rate of amine aqueous solution for the spraying reaction. This amine aqueous solution requires regeneration, and the increased usage leads to higher load and energy consumption for the regeneration unit, resulting in insufficient energy efficiency. Therefore, those skilled in the art have provided an energy-saving carbon dioxide capture and separation tower to address the problems mentioned in the background section. Utility Model Content

[0004] 1. Technical Solution

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an energy-saving carbon dioxide capture and separation tower, comprising,

[0007] The capture structure includes a separation tower and a viewing window located inside the lower end of the separation tower.

[0008] The spray structure includes, from top to bottom, a buffer tank II, a connecting pipe II, a buffer tank I, a connecting pipe I, and a mounting box; nozzles arranged in a ring array at the lower end of the mounting box; a pressurized water pump located at one end of the separation tower; a rotating seat located inside the buffer tank I; a support rod I arranged in a ring array on the outer wall of the rotating seat and connected to the inner wall of the buffer tank II; a rotating shaft rotatably installed inside the rotating seat; a delivery pipe located at the output end of the pressurized water pump and connected to the buffer tank II; impellers arranged in a ring array on the outer wall of the rotating shaft and corresponding to the connection between the delivery pipe and the buffer tank II; and stirring rods arranged in a ring array on the lower outer wall of the rotating shaft.

[0009] as well as;

[0010] The opening and closing structure includes a valve seat located inside the connecting pipe one and the connecting pipe two, and a valve block located inside the valve seat.

[0011] Furthermore, both the front end of the buffer tank and the front end of the separation tower are provided with corresponding viewing windows, and an exhaust pipe is provided at the top of the separation tower, with a gas detector installed inside the exhaust pipe.

[0012] Specifically, the usage of the activator mixed inside the buffer tank can be viewed through window two.

[0013] Furthermore, a base is provided at the lower end of the separation tower, a discharge pipe is provided at the lower end of the separation tower, a valve is provided inside the discharge pipe, and an air inlet pipe is connected to the lower end of the separation tower.

[0014] Specifically, the solution after reaction is discharged from the exhaust pipe, and the treated flue gas input through the intake pipe first comes into contact with the solution after reaction inside the lower end of the separation tower, and flows upward in the form of bubbles.

[0015] Furthermore, the separation tower is provided with equally spaced partitions inside, and the partitions are provided with equally spaced through holes inside;

[0016] Specifically, the baffle intercepts the sprayed liquid, and the reacted solution drips down through the holes in the form of droplets. The liquid output in the form of bubbles is reacted a second time by the dripping liquid, which enhances the reaction effect between the solution and the gas.

[0017] Furthermore, a top rod is provided at the lower end of the valve block, and a slide seat is provided inside both the first and second connecting pipes. The top rod is slidably rubbed against the inside of the slide seat. The outer wall of the valve block and the inner wall of the valve seat are both tapered. A spring is provided at the upper end of the slide seat, which is connected to the valve block and sleeved on the outside of the top rod. Support rods two are arranged in a ring array on the outer wall of the slide seat.

[0018] Specifically, the push rod is elastically supported by a spring, which allows the valve block to be elastically supported inside the valve seat. The support rod supports the slide, and the slide supports the push rod. Inside the first connecting pipe, the gap between the valve block and the valve seat controls the flow rate output from the first buffer box and entering the mounting box. Inside the second connecting pipe, the gap between the valve block and the valve seat controls the flow rate output from the second buffer box and entering the first buffer box.

[0019] Furthermore, both the first and second connecting pipes are equipped with a hydraulic rod at one end, and the telescopic end of the hydraulic rod is equipped with a cone plate whose upper end height gradually increases to one side. The lower end of the push rod is rotatably installed with a ball bearing that rolls and fits against the upper end of the cone plate.

[0020] Specifically, the hydraulic rod drives the telescopic rod to move the tapered plate to pressurize the lower end of the push rod. The compression degree of the spring and the gap between the valve block and the valve seat are adjusted by the tapered surface, and the ball bearings reduce the friction and resistance during the compression process of the push rod.

[0021] Furthermore, one end of the second buffer box is connected to an input pipe, and a closing cover is provided at the opening of the input pipe;

[0022] Specifically, the activator is introduced into the buffer box 2 through the input tube, and the opening and closing of the input tube is controlled by closing the cover.

[0023] 2. Beneficial effects

[0024] Compared with existing technologies, the advantages of this utility model are:

[0025] In this invention, the treated flue gas is transported into the separation tower, where it flows from top to bottom. During this flow, the amine aqueous solution sprayed from the nozzles reacts with the gas, reacting with the carbon dioxide in the gas. Most of the carbon dioxide is chemically absorbed by the absorbent, forming weakly bound compounds. The treated gas is then discharged from the top of the tower. During this process, the existing pressurized water pump in the separation tower delivers the amine aqueous solution and mixes the activator, increasing the reaction rate and absorption capacity. Furthermore, during the input process, the buffer tank continuously delivers the activator into its interior. Under water pressure, the impeller stirs and mixes the different solutions, avoiding the use of additional electrical equipment. This reduces the use of the amine aqueous solution, lowers the processing pressure and energy consumption of the regeneration unit for the amine aqueous solution, and achieves indirect energy saving.

[0026] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

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

[0028] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a front-view three-dimensional structural diagram of the internal structure of the separation tower of this utility model;

[0030] Figure 3 This is a bottom-view perspective view of the buffer box 1 and buffer box 2 of this utility model.

[0031] Figure 4This is a three-dimensional sectional view of the buffer box of this utility model.

[0032] Figure 5 This is a three-dimensional sectional view of the valve block of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 100. Capture structure; 101. Separation tower; 102. Viewing window one; 103. Discharge pipe; 104. Valve; 105. Base; 106. Viewing window two; 107. Exhaust pipe; 108. Gas detector; 109. Inlet pipe;

[0035] 200. Spray structure; 201. Inlet pipe; 202. Closing cover; 203. Pressurized water pump; 204. Delivery pipe; 205. Buffer tank one; 206. Connecting pipe one; 207. Mounting box; 208. Partition plate; 209. Through hole; 210. Connecting pipe two; 211. Buffer tank two; 212. Nozzle; 213. Rotating seat; 214. Rotating shaft; 215. Support rod one; 216. Impeller; 217. Stirring rod;

[0036] 300. Opening and closing structure; 301. Valve seat; 302. Valve block; 303. Hydraulic rod; 304. Conical plate; 305. Top rod; 306. Ball bearing; 307. Slide seat; 308. Support rod two; 309. Spring. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0041] Example 1

[0042] Please see Figure 1-5 As shown, this embodiment is an energy-saving carbon dioxide capture and separation tower, comprising:

[0043] The capture structure 100 includes a separation tower 101 and a viewing window 102 located inside the lower end of the separation tower 101.

[0044] The spray structure 200 includes, from top to bottom, a buffer tank 211, a connecting pipe 210, a buffer tank 205, a connecting pipe 206, and a mounting box 207; nozzles 212 arranged in a ring array at the lower end of the mounting box 207; a pressurized water pump 203 located at one end of the separation tower 101; a rotating seat 213 located inside the buffer tank 205; a support rod 215 arranged in a ring array on the outer wall of the rotating seat 213 and connected to the inner wall of the buffer tank 211; a rotating shaft 214 rotatably installed inside the rotating seat 213; a conveying pipe 204 located at the output end of the pressurized water pump 203 and connected to the buffer tank 211; a wheel blade 216 arranged in a ring array on the outer wall of the rotating shaft 214 and corresponding to the point where the conveying pipe 204 connects to the buffer tank 211; and a stirring rod 217 arranged in a ring array on the lower outer wall of the rotating shaft 214.

[0045] as well as;

[0046] The opening and closing structure 300 includes a valve seat 301 located inside the first connecting pipe 206 and the second connecting pipe 210, and a valve block 302 located inside the valve seat 301.

[0047] Both the front end of the buffer tank 211 and the front end of the separation tower 101 are equipped with corresponding viewing windows 216. The upper end of the separation tower 101 is equipped with an exhaust pipe 107, and a gas detector 108 is installed inside the exhaust pipe 107.

[0048] A base 105 is provided at the lower end of the separation tower 101, a discharge pipe 103 is provided at the lower end of the separation tower 101, a valve 104 is provided inside the discharge pipe 103, and an air inlet pipe 109 is connected to the lower end of the separation tower 101.

[0049] The separation tower 101 is provided with equally spaced baffles 208 inside, and equally spaced through holes 209 are opened inside the baffles 208.

[0050] A push rod 305 is provided at the lower end of the valve block 302. A slide seat 307 is provided inside both the first connecting pipe 206 and the second connecting pipe 210. The push rod 305 is slidably rubbed against the inside of the slide seat 307. The outer wall of the valve block 302 and the inner wall of the valve seat 301 are both tapered. A spring 309 is provided at the upper end of the slide seat 307, which is connected to the valve block 302 and sleeved on the outside of the push rod 305. Support rods 308 arranged in a ring array are provided on the outer wall of the slide seat 307.

[0051] Hydraulic rods 303 are provided at one end of both connecting pipe 1 206 and connecting pipe 2 210. A cone plate 304 with an upper height that gradually increases to one side is provided at the telescopic end of the hydraulic rod 303. A ball bearing 306 that rolls and fits against the upper end of the cone plate 304 is rotatably installed inside the lower end of the push rod 305.

[0052] One end of the buffer box 211 is connected to the input tube 201, and a closing cover 202 is provided at the opening of the input tube 201.

[0053] The spray structure 200 and the opening / closing structure 300 are used;

[0054] The flue gas, after dust removal, desulfurization, and denitrification pretreatment, is introduced from the bottom inlet pipe 109 of the separation tower 101 and flows upward in the form of bubbles. The pressurized water pump 203 is started to pump the amine aqueous solution into the buffer tank 211 at the top of the tower. At the same time, the activator is injected into the buffer tank 211 through the independent connecting pipe 210. When the water flows through the delivery pipe 204, it impacts the impeller 216, which drives the rotating shaft 214 to rotate. The linkage stirring rod 217 mechanically mixes the solution in the buffer tank without the need for additional electric power to drive the stirring equipment.

[0055] The mixed solution flows into the buffer tank 205 through the connecting pipe 210, and then enters the bottom mounting box 207 through the connecting pipe 206. It is sprayed downward by the nozzles 212 of the annular array. The hydraulic rod 303 pushes the conical plate 304 to move, and the ball bearing 306 lifts the top rod 305, compressing the spring 309, so that the gap between the conical valve block 302 and the valve seat 301 changes, thereby regulating the solution flow rate, avoiding excessive spraying, and reducing the amount of amine solution circulating.

[0056] The spray liquid and the rising flue gas come into countercurrent contact in the tower. The amine liquid absorbs CO to generate rich liquid. The multi-layer baffle 208 intercepts the falling droplets, and its through holes 209 make the droplets fall in a dispersed manner, and collide with the rising bubbles for a second reaction. The baffle 208 prolongs the gas-liquid contact time, improves the single absorption efficiency, and makes up for the short residence time of the flue gas. After decarbonization, the gas is discharged through the exhaust pipe 107 at the top of the tower. The built-in gas detector 108 monitors the CO concentration in real time.

[0057] The rich liquid is discharged from the bottom discharge pipe 103 to the regeneration section. It is worth noting that the rich liquid is usually heated by a heat exchanger in the regeneration tower, with steam as the main heat source. Then it flows downward. At a lower pressure and a higher temperature, usually 100-120℃, the compounds in the rich liquid that are combined with CO undergo a reverse reaction, releasing high-purity CO gas. The released CO gas is discharged from the top of the regeneration tower. After cooling, dehydration, and compression, it is ready for transportation, utilization, or storage. The absorbent solution that has desorbed most of the CO is called the lean liquid. It flows out from the bottom of the regeneration tower. After cooling, it is pumped back to the top of the absorption tower and reused to capture CO. The pressurized water flow drives the impeller 216 and the stirring rod 217 to achieve zero-power mixing of amine liquid and activator, replacing the traditional electric stirrer and reducing system power consumption.

[0058] Valve block 302 controls the solution flow rate. The falling droplets and rising bubbles react in a secondary reaction, which improves the CO capture rate and reduces the amine liquid circulation volume under the same processing capacity. Traditional problems include short flue gas residence time, requiring high flow rate amine liquid spraying, and a sharp increase in regeneration energy consumption. By reusing mechanical energy and dynamically throttling, the amount of amine liquid used is reduced. The baffle 208 enhances mass transfer and reduces dependence on high spray volume, ultimately reducing the processing capacity of the regeneration unit and reducing steam consumption, thus achieving comprehensive energy saving.

[0059] Viewing windows 102 and 106 allow for real-time observation of liquid level and mixing status, facilitating adjustment of activator dosage. Through fluid-driven mixing, hydraulic adaptive throttling, and secondary absorption by baffle 208, energy consumption is concentrated in the core reaction process, eliminating redundant power consumption, directly reducing amine liquid circulation, and indirectly significantly reducing regeneration steam demand, thus solving the problem of high energy consumption in chemical absorption methods.

[0060] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy-efficient carbon dioxide capture separation column, characterized by: include, The trapping structure (100) includes a separation tower (101) and a viewing window (102) located inside the lower end of the separation tower (101); The spray structure (200) includes, from top to bottom, a buffer tank two (211), a connecting pipe two (210), a buffer tank one (205), a connecting pipe one (206), and a mounting box (207); nozzles (212) arranged in a ring array at the lower end of the mounting box (207); a pressurized water pump (203) located at one end of the separation tower (101); a rotating seat (213) located inside the buffer tank one (205); and nozzles arranged in a ring array on the outer wall of the rotating seat (213). Support rod 1 (215) connected to the inner wall of buffer tank 2 (211), rotating shaft (214) rotatably installed inside rotating seat (213), delivery pipe (204) located at the output end of pressurized water pump (203) and connected to buffer tank 2 (211), impeller (216) located on the outer wall of rotating shaft (214) in a ring array and corresponding to the connection between delivery pipe (204) and buffer tank 2 (211), and stirring rod (217) located on the lower outer wall of rotating shaft (214) in a ring array; as well as; The opening and closing structure (300) includes a valve seat (301) located inside the first connecting pipe (206) and the second connecting pipe (210), and a valve block (302) located inside the valve seat (301).

2. The energy-saving carbon dioxide capture and separation tower according to claim 1, characterized in that: Both the front end of the buffer tank (211) and the front end of the separation tower (101) are provided with corresponding viewing windows (106). An exhaust pipe (107) is provided at the upper end of the separation tower (101), and a gas detector (108) is provided inside the exhaust pipe (107).

3. The energy-saving carbon dioxide capture and separation tower according to claim 1, characterized in that: The lower end of the separation tower (101) is provided with a base (105), the lower end of the separation tower (101) is provided with a discharge pipe (103), the discharge pipe (103) is provided with a valve (104), and the lower end of the separation tower (101) is connected to an air inlet pipe (109).

4. The energy-saving carbon dioxide capture and separation tower according to claim 1, characterized in that: The separation tower (101) is provided with equally spaced partitions (208), and equally spaced through holes (209) are provided inside the partitions (208).

5. The energy-saving carbon dioxide capture and separation tower according to claim 1, characterized in that: The lower end of the valve block (302) is provided with a push rod (305). Both the first connecting pipe (206) and the second connecting pipe (210) are provided with a slide seat (307). The push rod (305) is slidably rubbed against the inside of the slide seat (307). The outer wall of the valve block (302) and the inner wall of the valve seat (301) are both conical. The upper end of the slide seat (307) is provided with a spring (309) that is connected to the valve block (302) and sleeved on the outside of the push rod (305). The outer wall of the slide seat (307) is provided with a second support rod (308) arranged in a ring array.

6. The energy-saving carbon dioxide capture and separation tower according to claim 5, characterized in that: Hydraulic rods (303) are provided at one end of both the first connecting pipe (206) and the second connecting pipe (210). The telescopic end of the hydraulic rod (303) is provided with a cone plate (304) whose upper end height gradually increases to one side. A ball bearing (306) that rolls and fits against the upper end of the cone plate (304) is rotatably installed inside the lower end of the top rod (305).

7. The energy-saving carbon dioxide capture and separation tower according to claim 1, characterized in that: One end of the buffer box (211) is connected to an input pipe (201), and a closing cover (202) is provided at the opening of the input pipe (201).

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