Carbon dioxide drying system

Abstract

The utility model relates to a carbon dioxide drying system and relates to the technical field of gas drying, the carbon dioxide drying system comprises a tank body, a tank cover, a gas inlet pipe and a gas outlet pipe, a drying pond and a spiral pipe are fixedly arranged in the tank body in sequence from bottom to top, the top end and the bottom end of the drying pond are both closed, and the spiral pipe is spiral in the vertical direction; the spiral pipe is arranged in the drying pond, the bottom end of the spiral pipe is communicated with the interior of the top of the drying pond, the top end of the spiral pipe is open, concentrated sulfuric acid is contained in the drying pond and the spiral pipe, a first one-way valve is installed at the bottom end of the spiral pipe, and the first one-way valve only enables carbon dioxide to enter the spiral pipe from the drying pond; one end of the air inlet pipe is positioned outside the tank body and close to the bottom, and the other end of the air inlet pipe is inserted into the drying pool; one end of the air outlet pipe is fixedly connected with the tank body and is communicated with the interior of the top of the tank body. The method has the effect of prolonging the drying time of carbon dioxide in concentrated sulfuric acid.

Description

Technical Field

[0001] This application relates to the field of gas drying technology, and in particular to a carbon dioxide drying system. Background Technology

[0002] Industrial production processes, especially the preparation of some chemicals, generate large amounts of carbon dioxide. Emitting carbon dioxide into the atmosphere damages the environment and contributes to the greenhouse effect. Therefore, in order to protect the environment, it is necessary to recycle and treat the generated carbon dioxide.

[0003] Carbon dioxide often contains moisture during its production process, therefore, it needs to be dried before recovery and treatment. Currently, commonly used carbon dioxide drying systems include an upper tank, an inlet pipe, an outlet pipe, and a lower tank. The lower tank is top-opening, and the upper tank cover is located at the top opening of the lower tank. One end of the inlet pipe connects to the lower tank, and one end of the outlet pipe connects to the bottom of the upper tank, while the other end extends from the top of the upper tank. Cold air vents are located on the side wall of the upper tank, and the lower tank contains liquid desiccant. In use, carbon dioxide enters the lower tank through the inlet pipe for drying, then flows into the outlet pipe. Cold air is supplied through the cold air vents to cool the carbon dioxide in the outlet pipe, and finally, the carbon dioxide is discharged from the outlet pipe, completing the drying process.

[0004] The carbon dioxide drying method mentioned in the appeal has the problem of short residence time of carbon dioxide in the liquid desiccant, resulting in poor drying effect. Utility Model Content

[0005] To address the problem of poor drying effect of carbon dioxide in liquid desiccants, this application provides a carbon dioxide drying system.

[0006] This application provides a carbon dioxide drying system, which adopts the following technical solution:

[0007] A carbon dioxide drying system includes a tank, a tank cover, an inlet pipe, and an outlet pipe. The tank has an open top, and the tank cover is installed over the top opening of the tank. Inside the tank, from bottom to top, are a drying tank for holding liquid desiccant and a spiral tube. The top and bottom of the drying tank are closed. The spiral tube is spiral-shaped vertically, and its bottom end is connected to the top of the drying tank. The top end of the spiral tube is open. Both the drying tank and the spiral tube contain liquid desiccant. A first one-way valve is installed at the bottom of the spiral tube, which allows carbon dioxide to enter the spiral tube only from the drying tank. One end of the inlet pipe is located outside the tank near the bottom, and the other end is inserted into the drying tank. One end of the outlet pipe is fixedly connected to the tank and is connected to the top of the tank.

[0008] By adopting the above technical solution, the inlet pipe is used to send carbon dioxide from the outside into the drying tank, the drying tank is used for the first drying of carbon dioxide, the spiral tube contains liquid desiccant and is used for the second drying of carbon dioxide, the first one-way valve is used to prevent the liquid desiccant in the spiral tube from flowing into the drying tank, and the outlet pipe is used to discharge the dried carbon dioxide. Carbon dioxide enters the bottom of the drying tank from the inlet pipe, fills the spiral tube with liquid desiccant, moves along the spiral tube, and is discharged from the end of the spiral tube away from the drying tank. The use of the drying tank and the spiral tube increases the drying time of carbon dioxide in the liquid desiccant, thereby improving the drying effect.

[0009] Optionally, a drying bag is provided inside the tank, and the drying bag is located above the spiral tube.

[0010] By adopting the above technical solution, when carbon dioxide is discharged from the spiral tube, it will come into contact with the drying bag, and the drying bag will further dry the carbon dioxide, thereby improving the drying effect of carbon dioxide.

[0011] Optionally, the bottom of the drying bag is provided with a horizontally placed storage plate, which is fixedly connected to the inner wall of the tank, and the storage plate is provided with a number of round holes.

[0012] By adopting the above technical solution, when carbon dioxide is discharged from the spiral tube, it will enter the drying bag through several round holes on the storage plate during the upward flow, thereby improving the utilization rate of the drying bag.

[0013] Optionally, a connecting pipe is provided at one end of the spiral tube near the drying tank. One end of the connecting pipe is connected to the bottom of the spiral tube, and the other end is connected to the top of the drying tank. A first switching valve is installed on the connecting pipe at the end of the connecting pipe near the drying tank.

[0014] By adopting the above technical solution, the connecting pipe is used to replace the liquid desiccant in the spiral tube and the drying tank. If the liquid desiccant is used for too long, the drying effect of carbon dioxide will decrease, so it is necessary to replace the liquid desiccant. When the liquid desiccant is discharged, the first switch valve on the connecting pipe is opened, and the liquid desiccant in the spiral tube flows into the drying tank. When liquid desiccant is injected, new liquid desiccant is injected from the end of the spiral tube near the drying bag. The liquid desiccant enters the drying tank along the spiral tube and the connecting pipe. When the drying tank is full of liquid desiccant, the first switch valve on the spiral tube is closed, and the spiral tube is filled with liquid desiccant, which facilitates the replacement of the liquid desiccant in the spiral tube.

[0015] Optionally, a baffle plate is provided at one end of the spiral tube near the top, the top of the baffle plate is inserted through the baffle plate, and the baffle plate is fixedly connected to the inner wall of the tank.

[0016] By adopting the above technical solution, the isolation plate is used to prevent carbon dioxide from moving downwards. After the carbon dioxide comes out of the spiral tube, it is located above the isolation plate and moves upwards, which improves the drying efficiency of carbon dioxide.

[0017] Optionally, a waste liquid pool is provided outside the tank, and a liquid outlet pipe is provided near the bottom of the tank. One end of the liquid outlet pipe passes through the outer wall of the tank and communicates with the drying pool, and the other end communicates with the waste liquid pool. A second switch valve is installed on the liquid outlet pipe. The second switch valve is located at one end near the tank and outside the tank.

[0018] By adopting the above technical solution, the waste liquid pool is used to hold the liquid desiccant flowing out of the tank, the liquid outlet pipe is used to send the liquid desiccant into the waste liquid pool, and the second switch valve is used to control the inflow of liquid desiccant. When the second switch valve is in the open state, the liquid desiccant flows out of the tank. When the second switch valve is in the closed state, it prevents the liquid desiccant from flowing out, thus facilitating the control of the liquid desiccant's outflow.

[0019] Optionally, a filter is provided on the vent pipe, and the filter is located at one end near the bottom of the can lid.

[0020] By adopting the above technical solution, the filter is used to filter particles in carbon dioxide. After passing through the drying bag, carbon dioxide will carry particles or dust. Using the filter improves the cleanliness of carbon dioxide.

[0021] Optionally, a storage tank is provided outside the tank body, and an inlet pipe is connected between the storage tank and the spiral tube near the top. A delivery pump and a third switch valve are installed on the inlet pipe.

[0022] By adopting the above technical solution, the storage tank is used to hold the prepared liquid desiccant, the inlet pipe is used to send the liquid desiccant into the spiral tube, the delivery pump provides power, and the third switch valve is used to control the inflow of liquid desiccant and the outflow of carbon dioxide gas from the outlet pipe. When delivering liquid desiccant into the spiral tube, the third switch valve is opened and the delivery pump is started, and the liquid desiccant enters the spiral tube from the storage tank, which facilitates the injection of liquid desiccant.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The carbon dioxide drying system can increase the residence time of carbon dioxide in the liquid desiccant through the spiral tube. At the same time, the design of the drying tank and activated carbon completes the three-stage drying process of carbon dioxide, thereby improving the carbon dioxide drying effect.

[0025] 2. The use of the connecting pipe and the first switching valve enables the replacement of the liquid desiccant in the drying tank and the spiral tube, thereby ensuring that the liquid desiccant has a good drying effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the carbon dioxide drying system of this application;

[0027] Figure 2 This is a longitudinal sectional view of the carbon dioxide drying system of this application;

[0028] Figure 3 This is a schematic diagram of the explosion of the carbon dioxide drying system hidden in the tank of this application;

[0029] Figure 4 yes Figure 1 A magnified view of a portion of point A in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Tank body; 11. Inlet pipe; 111. Second one-way valve; 2. Tank cover; 21. Outlet pipe; 211. Filter; 3. Drying tank; 4. Spiral pipe; 41. First one-way valve; 42. Connecting pipe; 421. First switching valve; 43. Isolation plate; 5. Drying bag; 51. Storage plate; 6. Waste liquid tank; 61. Outlet pipe; 62. Second switching valve; 7. Storage tank; 71. Inlet pipe; 72. Third switching valve; 73. Transfer pump. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a carbon dioxide drying system. (Refer to...) Figure 1 and Figure 2 The carbon dioxide drying system includes a tank 1, a tank cover 2, an inlet pipe 11, and an outlet pipe 21. The tank 1 has an open top, and the tank cover 2 is placed over the top opening of the tank 1. Inside the tank 1, from bottom to top, there are a drying pool 3 for holding liquid desiccant, a spiral tube 4, and a drying bag 5. In this embodiment, the liquid desiccant is a high-concentration calcium chloride solution. The drying bag 5 is filled with activated carbon and anhydrous calcium chloride. One end of the inlet pipe 11 is located outside the tank 1, and the other end is inserted into the drying pool 3. The outlet pipe 21 is fixedly connected to the tank cover 2 and communicates with the inside of the tank 1. During drying, carbon dioxide enters the tank 1 through the inlet pipe 11, undergoes a first drying in the drying pool 3, a second drying through the spiral tube 4, and a third drying through the drying bag 5, before being discharged through the outlet pipe 21, completing the carbon dioxide drying process.

[0033] Reference Figure 1The canister 1 is cylindrical, and the canister lid 2 is a conical cylinder with an open bottom. The top opening of the canister 1 abuts against the bottom opening of the canister lid 2, and the canister 1 and canister lid 2 are detachably connected by bolts. After prolonged use, the desiccant bag 5 inside the canister 1 can be replaced by opening the canister lid 2.

[0034] Reference Figure 2 The drying tank 3 is a cylindrical shape with both the top and bottom closed. The side of the drying tank 3 abuts against the inner side of the tank body 1, and the drying tank 3 is fixedly connected to the bottom surface inside the tank body 1. In use, liquid desiccant is injected into the drying tank 3, and carbon dioxide is dried once in the drying tank 3.

[0035] Reference Figure 2 and Figure 3 The spiral tube 4 is spiral-shaped vertically, with its bottom end connected to the top of the drying tank 3. The top of the spiral tube 4 is open and located below the drying bag 5. A first one-way valve 41 is installed at the end of the spiral tube 4 near the drying tank 3. The first one-way valve 41 allows carbon dioxide to enter the spiral tube 4 while preventing liquid desiccant in the spiral tube 4 from entering the drying tank 3. An isolation plate 43 is installed at the top end of the spiral tube 4, with the top of the spiral tube 4 passing through it. The isolation plate 43 is circular, and its diameter is equal to the inner diameter of the tank 1. The storage plate 51 is fixedly connected to the tank 1. A connecting pipe 42 is installed at the end of the spiral tube 4 near the drying tank 3. One end of the connecting pipe 42 is connected to the end of the spiral tube 4 near the drying tank 3, and the other end is connected to the top of the drying tank 3. A first switching valve 421 is installed on the connecting pipe 42.

[0036] During the secondary drying of carbon dioxide, the first one-way valve 41 on the spiral tube 4 is in the open state, and the first switch valve 421 on the connecting pipe 42 is in the closed state. After the carbon dioxide is dried in the drying tank 3, it enters the spiral tube 4 and undergoes a second drying process along the spiral tube 4. When the liquid desiccant has been used for a period of time and the drying effect deteriorates, the first one-way valve 41 on the spiral tube 4 is in the closed state, and the first switch valve 421 on the connecting channel is in the open state. The liquid desiccant in the spiral tube 4 enters the drying tank 3 through the connecting pipe 42 to replace the liquid desiccant.

[0037] Reference Figure 3 The bottom of the drying bag 5 is provided with a horizontal storage plate 51. The drying bag 5 is placed on the storage plate 51, which is fixedly connected to the inner wall of the tank 1. The storage plate 51 has several round holes. In use, carbon dioxide enters from the spiral tube 4 below the storage plate 51 and enters the drying bag 5 through the round holes on the storage plate 51 for a third drying process.

[0038] Reference Figure 1A second one-way valve 111 is installed at the end of the inlet pipe 11 closest to the tank body 1. The second one-way valve 111 is located outside the tank body 1 and ensures that carbon dioxide can only enter the drying tank 3 along the inlet pipe 11. In use, carbon dioxide enters from the end of the inlet pipe 11 away from the tank body 1, passes through the second one-way valve 111, and then enters the drying tank 3 along the inlet pipe 11 for drying.

[0039] Reference Figure 1 A filter 211 is installed at one end of the vent pipe 21 near the can lid 2. The filter 211 is used to filter particles in the carbon dioxide. In use, after the carbon dioxide passes through the drying bag 5, the conical shape of the can lid 2 ensures that the carbon dioxide enters the vent pipe 21. The carbon dioxide passes through the filter 211 and is discharged from the vent pipe 21, completing the drying process.

[0040] Reference Figure 1 and Figure 4 The tank body 1 is equipped with a waste liquid pool 6 on its exterior, which holds the liquid desiccant flowing out of the tank body 1. A liquid outlet pipe 61 is located on the side of the tank body 1 near the bottom. A second switch valve 62 is installed at one end of the liquid outlet pipe 61 near the tank body 1. One end of the liquid outlet pipe 61 extends into the drying tank 3, and the other end connects to the top of the waste liquid pool 6. When the liquid desiccant needs to be replaced, the second switch valve 62 on the liquid outlet pipe 61 is open, and the liquid in the drying tank 3 is discharged into the waste liquid pool 6 through the liquid outlet pipe 61. After the liquid desiccant is discharged, the second switch valve 62 is closed to prevent the liquid desiccant from flowing out of the drying tank 3.

[0041] Reference Figure 2 A storage tank 7 is installed outside the tank body 1. The storage tank 7 contains the prepared liquid desiccant. An inlet pipe 71 connects the storage tank 7 to the spiral tube 4 near the top. A delivery pump 73 and a third switch valve 72 are installed on the inlet pipe 71. When the liquid desiccant is delivered from the spiral tube 4 to the drying tank 3, the third switch valve 72 on the liquid inlet pipe 71 and the first switch valve 421 on the connecting pipe 42 are in the open state. The delivery pump 73 sends the liquid desiccant in the storage tank 7 into the spiral tube 4. The liquid desiccant flows along the spiral tube 4 and the connecting pipe 42 into the drying tank 3. When the drying tank 3 is full of liquid desiccant, the first switch valve 421 on the connecting pipe 42 is closed. Then, the spiral tube 4 is filled with concentrated sulfuric acid, completing the input of concentrated sulfuric acid.

[0042] The implementation principle of a carbon dioxide drying system according to an embodiment of this application is as follows: Carbon dioxide enters the drying tank 3 from the inlet pipe 11, where it undergoes a first drying process. After passing through the drying tank 3, the carbon dioxide enters the spiral tube 4, which is filled with concentrated sulfuric acid. The carbon dioxide travels along the spiral tube 4, undergoing a second drying process. Next, the carbon dioxide enters the drying bag 5, where it undergoes a third drying process. After passing through the drying bag 5, the carbon dioxide enters the outlet pipe 21 and flows out through the filter 211 in the outlet pipe 21, completing the drying process. After a period of time, the concentration of concentrated sulfuric acid will decrease. Open the first switch valve 421 on the connecting pipe 42 and the second switch valve 62 on the outlet pipe 61. The concentrated sulfuric acid in the spiral tube 4 flows into the drying tank 3. The concentrated sulfuric acid in the drying tank 3 flows out through the outlet pipe 61. After completion, close the second switch valve 62 on the outlet pipe 61 and open the third switch valve 72 on the outlet pipe 61. The transfer pump 73 transports the concentrated sulfuric acid in the storage tank 7 to the spiral tube 4 through the inlet pipe 71. The concentrated sulfuric acid is then sent into the drying tank 3 along the spiral tube 4. When the drying tank 3 is full of concentrated sulfuric acid, close the first switch valve 421 on the connecting pipe 42 to fill the spiral tube 4 with concentrated sulfuric acid. Then close the third switch valve 72 on the outlet pipe 61 to complete the replacement of concentrated sulfuric acid.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A carbon dioxide drying system, characterized by: The utility model provides a kind of liquid desiccant air conditioning system, including tank body (1), tank cover (2), air inlet pipe (11), air outlet pipe (21), the tank body (1) is top opening, the tank cover (2) is covered in the tank body (1) top opening place;The tank body (1) inside is sequentially fixed with dry pool (3) and spiral pipe (4) for containing liquid desiccant from bottom to top, the dry pool (3) top end and bottom end are closed, the spiral pipe (4) is spiral along vertical direction, and the spiral pipe (4) bottom end with the dry pool (3) top portion inner communication, the spiral pipe (4) top end is open, the dry pool (3) and the spiral pipe (4) are contained with liquid desiccant, the spiral pipe (4) bottom end is equipped with first check valve (41), first check valve (41) can only make carbon dioxide from the dry pool (3) into the spiral pipe (4) inside;Air inlet pipe (11) one end is located in the tank body (1) outside near bottom, other end inserts in the dry pool (3);Air outlet pipe (21) one end is fixedly connected with the tank body (1), and with the tank body (1) top portion inner communication.

2. The carbon dioxide drying system of claim 1, wherein: The tank body (1) is provided with a drying bag (5), and the drying bag (5) is located above the spiral pipe (4).

3. The carbon dioxide drying system of claim 2, wherein: The bottom of the drying bag (5) is provided with a horizontally placed storage plate (51), and the storage plate (51) is fixedly connected with the inner wall of the tank body (1). A plurality of circular holes are formed in the storage plate (51).

4. The carbon dioxide drying system of claim 1, wherein: The spiral pipe (4) is provided with a communication pipe (42) near one end of the dry pool (3). One end of the communication pipe (42) is in communication with the spiral pipe (4) near the bottom end, and the other end is in communication with the top of the dry pool (3). A first switch valve (421) is installed on the communication pipe (42), and the first switch valve (421) is located near one end of the communication pipe (42) close to the dry pool (3).

5. The carbon dioxide drying system of claim 1, wherein: The spiral pipe (4) is provided with an isolation plate (43) near one end of the top. The isolation plate (43) is fixedly connected with the inner wall of the tank body (1).

6. The carbon dioxide drying system of claim 1, wherein: The tank body (1) is provided with a waste liquid pool (6) outside. The tank body (1) is provided with a liquid outlet pipe (61) near the bottom. One end of the liquid outlet pipe (61) penetrates through the outer side wall of the tank body (1) and communicates with the dry pool (3), and the other end communicates with the waste liquid pool (6). A second switch valve (62) is installed on the liquid outlet pipe (61). The second switch valve (62) is located near one end of the tank body (1) and is located outside the tank body (1).

7. The carbon dioxide drying system of claim 1, wherein: A filter (211) is arranged on the air outlet pipe (21), and the filter (211) is located near one end of the bottom of the tank cover (2).

8. The carbon dioxide drying system of claim 1, wherein: The tank body (1) is provided with a storage tank (7) outside. The storage tank (7) and the spiral pipe (4) are in communication with each other through a liquid inlet pipe (71) near the top end. A delivery pump (73) and a third switch valve (72) are installed on the liquid inlet pipe (71).

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