Carbon dioxide liquefying device

Abstract

The utility model belongs to the field of carbon dioxide liquefying devices, and discloses a carbon dioxide liquefying device which comprises a liquefying box, a gas conveying assembly and a pressurizing assembly are installed on the top of the liquefying box, a discharging assembly and a barometer are installed at the bottom of the liquefying box, a sealing plate is installed in the liquefying box in a sliding mode, and the pressurizing assembly is in transmission connection with the sealing plate. The pressure maintaining mechanism comprises a pressure maintaining plate, a pressure maintaining spring, a connecting rod and a limiting block, the connecting rod is fixed to the bottom of the sealing plate, the limiting block is fixed to the bottom of the connecting rod, the connecting rod is sleeved with the pressure maintaining plate in a sliding mode, the pressure maintaining plate is arranged on the inner side of the liquefying box in a sliding fit mode, and the connecting rod is sleeved with the pressure maintaining spring which is located between the pressure maintaining plate and the sealing plate. And through the arrangement of the pressure maintaining device, when the liquid carbon dioxide in the liquefaction box is discharged, the air pressure in the liquefaction box can be kept relatively stable, so that the vaporization degree of the carbon dioxide is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon dioxide liquefaction devices, and in particular relates to a carbon dioxide liquefaction device. Background Art

[0002] Among greenhouse gases, excessive emissions of industrial carbon dioxide (CO2) are an important factor leading to global warming. Carbon dioxide is an important gas for some industrial uses. Therefore, collecting carbon dioxide from exhaust gases can reduce greenhouse gas emissions and can also be used for industrial purposes. Generally, the collected carbon dioxide is stored and transported in liquefied form.

[0003] A Chinese patent with publication number CN216845324U discloses a carbon dioxide liquefaction device for a flue gas carbon capture system. The device installs a molecular sieve inside the delivery pipe, which filters impurities and water mist in the carbon dioxide to prevent it from affecting the subsequent work. A lubricating metal film is installed on the inner wall of the liquefaction tank. The lubricating metal film has a good lubricating effect, which makes the sealing plate move up and down more smoothly. An observation window is installed at the front end of the liquefaction tank to facilitate the user to observe the working conditions inside the liquefaction tank, which greatly improves the perfection of the device.

[0004] However, in actual use, when the liquefied carbon dioxide is discharged from the liquefied tank, the capacity of the carbon dioxide decreases, which will cause part of the liquid carbon dioxide in the liquefied tank to vaporize while the volume remains unchanged, thereby affecting the purity of the discharged liquid carbon dioxide. Although the gas compression mechanism can fully compress the carbon dioxide so that the gas pressure in the liquefied tank is much greater than the liquefied gas pressure of the carbon dioxide, thereby overcoming the decrease in gas pressure when discharging carbon dioxide to a certain extent, as the pressure in the liquefied tank increases, the strength required for storage and transportation devices such as the liquefied tank also needs to be increased, thereby greatly increasing the cost. Utility Model Content

[0005] The utility model aims to provide a carbon dioxide liquefaction device to solve the above-mentioned problem of reduced gas pressure when discharging liquid carbon dioxide.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbon dioxide liquefaction device, comprising

[0007] A liquefaction box, a gas delivery component and a pressurizing component are installed on the top of the liquefaction box, a discharging component and a pressure gauge are installed on the bottom of the liquefaction box, a sealing plate is slidably installed in the liquefaction box, and the pressurizing component is drivingly connected to the sealing plate;

[0008] The pressure-maintaining mechanism includes a pressure-maintaining plate, a pressure-maintaining spring, a connecting rod and a limit block. The connecting rod is fixed to the bottom of the sealing plate, the limit block is fixed to the bottom of the connecting rod, the pressure-maintaining plate is slidably mounted on the connecting rod, and the pressure-maintaining plate is slidably fitted on the inner side of the liquefied tank, the pressure-maintaining spring is mounted on the connecting rod, and is located between the pressure-maintaining plate and the sealing plate.

[0009] The principle and effect of this technical solution:

[0010] 1. After the carbon dioxide gas is transported to the liquefied tank through the gas delivery component, the sealing plate is pressed down by the pressurizing component, and the pressure-maintaining mechanism is pressed down, so that the carbon dioxide gas is liquefied, and then the liquid carbon dioxide is discharged through the discharging component. As the carbon dioxide is discharged, the pressure-maintaining mechanism starts to work to maintain the pressure in the liquefied tank, thereby positioning the carbon dioxide.

[0011] 2. Through the setting of the pressure-maintaining mechanism, when the sealing plate is pressed downward, the pressure at the bottom of the inner side of the liquefied tank increases, which causes the pressure-maintaining plate to be subjected to upward pressure, thereby driving the pressure-maintaining plate to compress the pressure-maintaining spring and move upward to balance the increased pressure. As the sealing plate moves downward, the pressure-maintaining plate follows the sealing plate downward and slides upward relative to the sealing plate, thereby pressurizing the entire liquefied tank until the pressure of the barometer reaches a certain parameter, and then the pressurization is stopped. When the liquid carbon dioxide is discharged through the discharge assembly, as the total capacity of carbon dioxide decreases, according to PV=(m / M)RT, it can be seen that the pressure in the liquefied tank also decreases. From the relationship P=F / S, it can be seen that when the area of ​​the pressure-maintaining plate remains unchanged, due to the decrease in pressure, the pressure applied to the pressure-maintaining plate also decreases. The pressure-maintaining spring drives the pressure-maintaining plate to move downward relative to the sealing plate, thereby reducing the volume occupied by carbon dioxide in the liquefied tank, thereby increasing the pressure on carbon dioxide, thereby playing a pressure-maintaining role to a certain extent and reducing the degree of carbon dioxide vaporization.

[0012] 3. The selected pressure-maintaining spring is a strong spring, which saves costs and has higher economic benefits compared to improving the strength of the liquefied tank and the conveying components.

[0013] The utility model is further configured as follows: the sealing plate includes a pressure plate and a sealing ring, the pressure plate and the liquefaction tank are slidably matched, and the bottom of the pressure plate has a boss, the sealing ring is fixed outside the boss, and the top of the sealing ring is in contact with the bottom of the pressure plate, the outer wall of the sealing ring is in slidable contact with the inner wall of the liquefaction tank, and the connecting rod is fixed to the bottom of the boss.

[0014] The principle and effect of this technical solution: because the sealing ring is sleeved outside the boss and the top is in contact with the sealing plate, the sealing ring can also be blocked by the sealing plate when pressed down, which can achieve a better sealing and pressurizing effect, thereby making the shape of the sealing ring more stable, and due to the increase in contact area, the sealing ring can be more firmly fixed to the bottom of the sealing plate, so that the sealing ring is not easy to fall off.

[0015] The utility model is further configured as follows: four corners of the inner side of the liquefied tank are provided with protrusions.

[0016] The principle and effect of this technical solution: the setting of the four protrusions is equivalent to the setting of reinforcing ribs, which improves the structural strength of the liquefied tank. At the same time, through the setting of the four protrusions, the setting of the protrusions can also guide the sliding of the pressure-maintaining plate and the sealing plate, so that the sealing plate and the pressure-maintaining plate are more stable when pressurized and sliding.

[0017] The utility model is further configured as follows: the pressurizing component includes a slow-speed motor, a driving shaft, a driving gear, a driven gear, a screw, a connecting block and a protective cover, the protective cover is fixed to the top of the liquefaction tank, the slow-speed motor is fixed to the top of the protective cover, the driving shaft is rotatably installed on the top of the liquefaction tank, the top of the driving shaft passes through the protective cover and is fixed to the rotating end of the slow-speed motor, the driving gear is fixed to the driving shaft and is located on the inner side of the protective cover, the connecting block is fixed to the sealing plate, the bottom of the screw is fixed to the connecting block, the top of the screw passes through the top of the liquefaction tank and the protective cover, and extends to above the top of the protective cover, the driven gear is rotatably installed on the top of the liquefaction tank, is located in the protective cover, and is threadedly mounted on the screw, and the driven gear is meshed with the driving gear.

[0018] The principle and effect of this technical solution is as follows: the driving shaft is driven to rotate by a slow-speed motor, so that the driving shaft drives the driving gear to rotate, and the driving gear drives the driven gear, so that the screw rod with the threaded sleeve of the driven gear moves up and down, and the driving force exerted on the sealing plate is more uniform through the drive of the connecting block, so that the sealing plate can be driven by the slow-speed motor to compress the inside of the liquefied tank.

[0019] The utility model is further configured as follows: two slow-speed motors, drive shafts and drive gears are matched and arranged symmetrically with respect to the screw rod.

[0020] The principle and effect of this technical solution: The setting of two slow-speed motors, a drive shaft and a drive gear makes the driving force on the driven gear more balanced and symmetrical, thereby avoiding the deflection caused by unilateral driving of the driven gear and improving the stability of the pressurizing mechanism.

[0021] The utility model is further configured as follows: a guide cylinder is fixed on the top of the protective cover, and the screw rod is slidably inserted in the guide cylinder.

[0022] The principle and effect of this technical solution: The setting of the guide cylinder can guide the screw rod under pressure when it rotates up and down, thereby limiting the deflection of the screw rod, making the up and down movement of the screw rod more stable and improving the reliability of the pressurizing mechanism.

[0023] The utility model is further configured as follows: the gas delivery component includes a negative pressure air cooler, an air supply pipe, a filter tube and a control tube; the negative pressure air cooler is fixed on the side wall of the liquefied tank; one end of the air supply pipe is connected to the negative pressure air cooler; the other end of the air supply pipe is rotatably connected to the outer wall with a threaded sleeve; one end of the filter tube is threadedly matched with the threaded sleeve and is connected to the air supply pipe; the control tube is fixed on the side wall at the top of the liquefied tank and is connected to the inside of the liquefied tank; a butterfly valve is installed on the control tube; one end of the control tube away from the liquefied tank is threadedly fitted with the filter tube, and the filter tube is connected to the control rod.

[0024] The principle and effect of this technical solution is: the threaded sleeve is rotatably installed on the air supply pipe and is threadedly mounted on the filter pipe, and the other end of the filter pipe is threadedly mounted on the control pipe, so that the filter pipe can be easily disassembled and replaced after being used for a period of time, thereby ensuring the filtering effect of the filter pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the main structural diagram of the utility model;

[0026] Figure 2 for Figure 1 A top view structural diagram of the middle liquefaction tank;

[0027] Figure 3 for Figure 1 A bottom view of the structure of the middle sealing plate;

[0028] Figure 4 for Figure 1 Enlarged view of the middle filter tube. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0030] The figure marks in the drawings of the specification include: 101, liquefaction tank; 102, pressure gauge; 103, discharge assembly; 104, bump; 201, pressure maintaining plate; 202, pressure maintaining spring; 203, connecting rod; 204, limit block; 301, pressure plate; 302, boss; 303, sealing ring; 401, slow motor; 402, drive shaft; 403, drive gear; 404, driven gear; 405, screw; 406, connecting block; 407, protective cover; 408, guide cylinder; 501, negative pressure cooler; 502, air supply pipe; 503, filter pipe; 504, control pipe; 505, threaded sleeve.

[0031] As attached Figure 1-4 As shown, the utility model discloses a carbon dioxide liquefaction device, including a liquefaction tank 101, a pressure-maintaining mechanism, a gas delivery component, a pressurizing component, a discharge component 103, a pressure gauge 102 and a sealing plate;

[0032] The four corners of the inner side of the liquefied tank 101 are provided with square protrusions 104 . The pressure gauge 102 is fixed to the left side of the bottom of the liquefied tank 101 and is connected to the inside of the liquefied tank 101 . The discharge assembly 103 includes a discharge pipe and a butterfly valve installed on the discharge pipe. The discharge pipe is connected to the inside of the liquefied tank 101 .

[0033] The gas delivery component includes a negative pressure cooling fan 501, an air supply pipe 502, a filter tube 503 and a control tube 504. The negative pressure cooling fan 501 is fixed on the side wall of the liquefied tank 101, one end of the air supply pipe 502 is connected to the negative pressure cooling fan 501, and the outer wall of the other end of the air supply pipe 502 is rotatably connected with a threaded sleeve 505, one end of the filter tube 503 is threadedly matched with the threaded sleeve 505, and is abutted and connected with the air supply pipe 502, the control tube 504 is fixed on the side wall at the top of the liquefied tank 101, and is connected with the inside of the liquefied tank 101, a butterfly valve is installed on the control tube 504, one end of the control tube 504 away from the liquefied tank 101 is threadedly fitted with the filter tube 503, and the filter tube 503 is connected with the control rod, and the filter tube 503 is installed with a molecular sieve and other filtering components for filtering water vapor and impurities.

[0034] The pressurizing assembly includes a slow motor 401, a drive shaft 402, a drive gear 403, a driven gear 404, a screw 405, a connecting block 406 and a protective cover 407. The protective cover 407 is fixed to the top of the liquefied tank 101, the slow motor 401 is fixed to the top of the protective cover 407, the drive shaft 402 is rotatably mounted on the top of the liquefied tank 101, the top of the drive shaft 402 passes through the protective cover 407 and is fixed to the rotating end of the slow motor 401, the drive gear 403 is fixed to the drive shaft 402 and is located inside the protective cover 407, and is connected to the The block 406 is fixed to the sealing plate, the bottom of the screw 405 is fixed to the connecting block 406, the top of the screw 405 passes through the top of the liquefied tank 101 and the protective cover 407, and extends to the top of the protective cover 407, the driven gear 404 is rotatably installed on the top of the liquefied tank 101, and is located in the protective cover 407, and is threadedly mounted on the screw 405, and the driven gear 404 is meshed with the driving gear 403, wherein the slow motor 401, the driving shaft 402 and the driving gear 403 are matched and arranged in two, and are symmetrical about the screw 405. A guide cylinder 408 is fixed to the top of the protective cover 407, and the screw 405 is slidably inserted in the guide cylinder 408.

[0035] The sealing plate includes a pressure plate 301 and a sealing ring 303. The pressure plate 301 is slidably matched with the liquefied tank 101, and the bottom of the pressure plate 301 has a boss 302. The sealing ring 303 is fixed to the outside of the boss 302, and the top of the sealing ring 303 is in contact with the bottom of the pressure plate 301, the outer wall of the sealing ring 303 is in slidable contact with the inner wall of the liquefied tank 101, and the connecting rod 203 is fixed to the bottom of the boss 302.

[0036] The pressure maintaining mechanism includes a pressure maintaining plate 201, a pressure maintaining spring 202, a connecting rod 203 and a limit block 204. The connecting rod 203 is fixed to the bottom of the sealing plate, the limit block 204 is fixed to the bottom of the connecting rod 203, the pressure maintaining plate 201 is slidably mounted on the connecting rod 203, and the pressure maintaining plate 201 is slidably fitted on the inner side of the liquefied tank 101, the pressure maintaining spring 202 is mounted on the connecting rod 203, and is located between the pressure maintaining plate 201 and the sealing plate.

[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A liquefied carbon dioxide device, characterized in that: include A liquefaction box, wherein a gas delivery component and a pressurizing component are installed on the top of the liquefaction box, a discharging component and a pressure gauge are installed on the bottom of the liquefaction box, a sealing plate is slidably installed in the liquefaction box, and the pressurizing component is drivingly connected to the sealing plate; The pressure-maintaining mechanism includes a pressure-maintaining plate, a pressure-maintaining spring, a connecting rod and a limit block. The connecting rod is fixed to the bottom of the sealing plate, and the limit block is fixed to the bottom of the connecting rod. The pressure-maintaining plate is slidably mounted on the connecting rod, and the pressure-maintaining plate is slidably fitted on the inner side of the liquefied tank. The pressure-maintaining spring is mounted on the connecting rod and is located between the pressure-maintaining plate and the sealing plate.

2. A liquefied carbon dioxide according to claim 1, characterized in that: The sealing plate includes a pressure plate and a sealing ring. The pressure plate is slidably matched with the liquefied tank, and the bottom of the pressure plate has a boss. The sealing ring is fixed to the outside of the boss, and the top of the sealing ring abuts against the bottom of the pressure plate. The outer wall of the sealing ring abuts against the inner wall of the liquefied tank in a slidable manner, and the connecting rod is fixed to the bottom of the boss.

3. The carbon dioxide liquefaction device according to claim 1, characterized in that: The four corners of the inner side of the liquefaction tank are all provided with convex blocks.

4. A liquefied carbon dioxide according to claim 1, characterized in that: The pressurizing assembly includes a slow-speed motor, a driving shaft, a driving gear, a driven gear, a screw, a connecting block and a protective cover. The protective cover is fixed to the top of the liquefaction tank, the slow-speed motor is fixed to the top of the protective cover, the driving shaft is rotatably installed on the top of the liquefaction tank, the top of the driving shaft passes through the protective cover and is fixed to the rotating end of the slow-speed motor, the driving gear is fixed to the driving shaft and is located on the inner side of the protective cover, the connecting block is fixed to the sealing plate, the bottom of the screw is fixed to the connecting block, the top of the screw passes through the top of the liquefaction tank and the protective cover, and extends above the top of the protective cover, the driven gear is rotatably installed on the top of the liquefaction tank, is located in the protective cover, and is threadedly mounted on the screw, and the driven gear is meshed with the driving gear.

5. A carbon dioxide liquefaction device as claimed in claim 4, characterized in that: The slow-speed motor, the driving shaft and the driving gear are matched with each other and are symmetrical with respect to the screw rod.

6. A carbon dioxide liquefaction device as claimed in claim 4, characterized in that: A guide cylinder is fixed on the top of the protective cover, and the screw rod is slidably inserted in the guide cylinder.

7. The carbon dioxide liquefaction device according to claim 1, characterized in that: The gas delivery assembly includes a negative pressure cooling fan, an air supply pipe, a filter tube and a control tube. The negative pressure cooling fan is fixed on the side wall of the liquefied tank, one end of the air supply pipe is connected to the negative pressure cooling fan, and the outer wall of the other end of the air supply pipe is rotatably connected with a threaded sleeve, one end of the filter tube is threadedly matched with the threaded sleeve and is connected to the air supply pipe in abutment. The control tube is fixed on the side wall at the top of the liquefied tank and is connected to the inside of the liquefied tank. A butterfly valve is installed on the control tube, and one end of the control tube away from the liquefied tank is threadedly fitted with the filter tube, and the filter tube is connected to the control rod.

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