Low-temperature liquid gas purification device

Abstract

The utility model provides a low-temperature liquid gas purification device which comprises a low-temperature rectifying tower, a liquid inlet pipe, a spring pipeline, an upper connecting pipe, a lower connecting pipe and a position adjusting mechanism, the position adjusting mechanism comprises a first electric push rod, a sieve plate tower plate, a rotating ring, a rotating motor, a gear and a rack, and the liquid inlet pipe extends into the low-temperature rectifying tower; liquid raw materials are conveyed through an upper connecting pipe, a spring pipeline and a lower connecting pipe in sequence, and a first electric push rod can adjust the height of a rotating ring through a sieve plate tower plate, so that the height of the lower connecting pipe connected with the rotating ring can be synchronously adjusted, and the height adjustment of a liquid inlet position is realized; the rotating motor on the sieve plate tower plate can drive the rotating ring to rotate through the gear and the rack, the rotating ring can drive the lower connecting pipe to rotate, horizontal adjustment of the liquid inlet position is achieved, through multi-directional liquid inlet position adjustment, the low-temperature distillation tower can be suitable for raw materials of different components, the separation efficiency is improved, and local overheating or supercooling in the low-temperature distillation tower is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas processing, in particular to a low-temperature liquid gas purification device. Background Art

[0002] Cryogenic liquid gas refers to gas that is liquid at extremely low temperatures. These gases are usually gaseous at room temperature and pressure. Common ones include argon, helium, hydrogen, nitrogen, oxygen and liquefied natural gas. These gases are widely used in industry, such as coolants, protective gases, chemical raw materials, or in medical and scientific research fields. After liquefying these gases, they can be stored and transported more easily, improving economy and practicality. In order to ensure that the cryogenic liquid gas meets the application standards and reduces the risk of use, the purity of the cryogenic liquid gas needs to be guaranteed. At present, it is used to separate and purify the cryogenic liquid gas. The main equipment for liquid gas is the cryogenic distillation tower. The raw gas is compressed and cooled to become liquid and then transported to the cryogenic distillation tower for separation and purification. However, when the current cryogenic distillation tower is in use, the liquid inlet position cannot be adjusted. It is impossible to adjust the number of plates in the cryogenic distillation tower after adjusting the liquid inlet position for raw gases with different compositions, resulting in poor separation ability of the components. In addition, the fixed liquid inlet position is prone to local overheating or local overcooling in the cryogenic distillation tower, and the thermal stress of equipment such as sieve plates, tower plates and pipelines is large, which is prone to damage, thereby reducing the service life of the cryogenic distillation tower. Utility Model Content

[0003] In view of this, the utility model proposes a cryogenic liquid gas purification device, which can adjust the position of the liquid inlet to facilitate the use of raw gas with different components, improve the separation effect, and extend the service life of the cryogenic distillation tower.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A cryogenic liquid gas purification device comprises a cryogenic distillation tower, a liquid inlet pipe, a spring pipe, an upper connecting pipe, a lower connecting pipe and a position adjustment mechanism, wherein one end of the liquid inlet pipe extends into the cryogenic distillation tower, the upper connecting pipe is connected to the end of the liquid inlet pipe located in the cryogenic distillation tower, the bottom end of the upper connecting pipe is connected to the top surface of the spring pipe, and the top end of the lower connecting pipe is connected to the bottom surface of the spring pipe; the position adjustment mechanism comprises a first electric push rod, a sieve plate, a rotating ring, a rotating motor, a gear and a rack, the first electric push rod is symmetrically arranged on the top surface of the cryogenic distillation tower, the output shaft of the first electric push rod is connected to the top surface of the sieve plate, the rotating ring is arranged below the sieve plate, the top surface of the first electric push rod is slidably connected to the bottom surface of the sieve plate, the rack is arranged on the inner circumferential surface of the rotating ring and is distributed in an annular shape, the rotating motor is arranged on the sieve plate, the output shaft of the first electric push rod passes downward through the sieve plate and is connected to the gear, the gear is meshed with the rack, and the outer wall of the lower connecting pipe is connected to the outer circumferential surface of the rotating ring.

[0006] Preferably, a T-shaped sliding block is provided on the top surface of the rotating ring, a T-shaped ring groove is provided on the bottom surface of the sieve plate tower plate, and the T-shaped sliding block is located in the T-shaped ring groove.

[0007] Preferably, the position adjustment mechanism further comprises a moving wheel, which is arranged on the bottom surface of the horizontal section of the T-shaped slider and contacts the inner bottom surface of the T-shaped ring groove.

[0008] Preferably, the position adjustment mechanism further comprises a horizontal tube, one end of which is connected to the bottom end of the lower connecting tube, and the other end of which extends below the rotating ring.

[0009] Preferably, the position adjustment mechanism also includes a second electric push rod, the horizontal tube includes a fixed tube, a corrugated telescopic tube, a movable tube and a connecting plate, the fixed tube, the corrugated telescopic tube and the movable tube are connected in sequence, the bottom end of the lower connecting tube is connected to the end of the fixed tube, the connecting plate is arranged on the top surface of the movable tube, the second electric push rod is arranged on the inner side wall of the rotating ring, and its output shaft is connected to the side wall of the connecting plate.

[0010] Preferably, it further comprises a valve, wherein the valve is arranged on the liquid inlet pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] ① The liquid inlet pipe extends into the cryogenic distillation tower, and the raw materials it transports are transported through the upper connecting pipe, the spring pipe and the lower connecting pipe in sequence, and the first electric push rod can drive the rotating ring and the lower connecting pipe to adjust the height through the sieve plate tower plate to achieve the change of the liquid raw material inlet height position, so that it can be suitable for raw materials of different compositions;

[0013] ② A rotating motor is also provided on the sieve plate, which can drive the gear to rotate, and drive the rotating ring to rotate through the rack. When the rotating ring rotates, it can drive the lower connecting pipe to rotate, so that the spring pipe is stretched, thereby realizing the change of the horizontal position of the raw material inlet, which is further suitable for raw materials of different compositions;

[0014] ③ Through multi-directional adjustment of the raw material position, local overheating or overcooling inside the cryogenic distillation tower can be avoided, thereby extending the service life of the cryogenic distillation tower and improving the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of a cryogenic liquid gas purification device of the utility model;

[0017] Figure 2 It is a schematic diagram of the connection structure of a position adjustment mechanism and a lower connecting pipe of a cryogenic liquid gas purification device of the utility model;

[0018] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0019] In the figure, 1 is a cryogenic distillation tower, 2 is a liquid inlet pipe, 3 is a spring pipe, 4 is an upper connecting pipe, 5 is a lower connecting pipe, 6 is a first electric push rod, 7 is a sieve plate tower plate, 8 is a rotating ring, 9 is a rotating motor, 10 is a gear, 11 is a rack, 12 is a T-shaped slider, 13 is a T-shaped ring groove, 14 is a moving wheel, 15 is a second electric push rod, 16 is a fixed pipe, 17 is a corrugated telescopic pipe, 18 is a moving pipe, 19 is a connecting plate, and 20 is a valve. DETAILED DESCRIPTION

[0020] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0021] See also Figures 1 to 3The utility model provides a cryogenic liquid gas purification device, comprising a cryogenic distillation tower 1, a liquid inlet pipe 2, a spring pipe 3, an upper connecting pipe 4, a lower connecting pipe 5 and a position adjustment mechanism, wherein one end of the liquid inlet pipe 2 extends into the cryogenic distillation tower 1, the upper connecting pipe 4 is connected to the end of the liquid inlet pipe 2 located in the cryogenic distillation tower 1, and the bottom end thereof is connected to the top surface of the spring pipe 3, and the top end of the lower connecting pipe 5 is connected to the bottom surface of the spring pipe 3; the position adjustment mechanism comprises a first electric push rod 6, a sieve plate tower plate 7, a rotating ring 8, a rotating motor 9, a gear 10 And a rack 11, the first electric push rod 6 is symmetrically arranged on the top surface of the low-temperature distillation tower 1, and its output shaft is connected to the top surface of the sieve plate tower plate 7, the rotating ring 8 is arranged below the sieve plate tower plate 7, and its top surface is slidingly connected to the bottom surface of the sieve plate tower plate 7, the rack 11 is arranged on the inner circumferential surface of the rotating ring 8 and is distributed in a ring shape, the rotating motor 9 is arranged on the sieve plate tower plate 7, and its output shaft passes downward through the sieve plate tower plate 7 and is connected to the gear 10, the gear 10 is meshed with the rack 11, and the outer wall of the lower connecting pipe 5 is connected to the outer circumferential surface of the rotating ring 8.

[0022] One end of the liquid inlet pipe 2 extends into the cryogenic distillation tower 1, and the liquid raw material transported by it can be transported to the cryogenic distillation tower 1 through the upper connecting pipe 4, the spring pipe 3 and the lower connecting pipe 5 in sequence. During the evaporation and cooling action of the cryogenic distillation tower 1, gas separation can be achieved. By collecting the gas at the top of the cryogenic distillation tower 1 and cooling it, cryogenic liquid gas can be obtained, and the cryogenic liquid gas is stored in a storage tank, so that the storage and transportation of the cryogenic liquid gas can be achieved.

[0023] A sieve plate tower plate 7 that can be raised and lowered is provided in the cryogenic distillation tower 1. During the separation process, the sieve plate tower plate 7 can realize a platform for gas-liquid two-phase contact, so that the rising steam and the descending liquid can interact with each other, and a rotating ring 8 is provided at the bottom of the sieve plate tower plate 7, and the outer wall of the lower connecting pipe 5 is connected to the outer circumferential surface of the rotating ring 8. The first electric push rod 6 can drive the lower connecting pipe 5 to rise and fall through the sieve plate tower plate 7 and the rotating ring 8, so that the spring pipe 3 is stretched or compressed, thereby realizing the height adjustment of the liquid inlet position. In addition, a rotating motor 9 is provided on the sieve plate mesh plate, and the rotating motor 9 can drive the gear 10 to rotate. The gear 10 can realize the rotation of the rotating ring 8 through the rack 11. When rotating, the rotating ring 8 can drive the lower connecting pipe 5 to move synchronously and stretch the spring pipe 3 to realize the horizontal adjustment of the liquid inlet position. Through the multi-directional adjustment of the liquid inlet position, it can be suitable for raw materials of different components, so as to facilitate real-time adjustment of the position of the tower plate in the cryogenic distillation tower 1.

[0024] When the liquid inlet position is adjusted horizontally, the rotating motor 9 can rotate forward and reverse according to the different adjustment positions to avoid the spring pipe 3 being stretched too long due to one rotation of the rotating ring 8. By adjusting the liquid inlet position, local overheating or overcooling inside the cryogenic distillation tower 1 can be avoided, and excessive thermal stress on pipelines and tower plates can be avoided, thereby extending the service life of the cryogenic distillation tower 1.

[0025] Preferably, a T-shaped slider 12 is provided on the top surface of the rotating ring 8, a T-shaped ring groove 13 is provided on the bottom surface of the sieve plate tower plate 7, the T-shaped slider 12 is located in the T-shaped ring groove 13, and the position adjustment mechanism also includes a moving wheel 14, which is provided on the bottom surface of the horizontal section of the T-shaped slider 12 and contacts with the inner bottom surface of the T-shaped ring groove 13.

[0026] When the rotating motor 9 drives the rack 11 to rotate through the gear 10 to realize the rotation of the rotating ring 8, the T-shaped slider 12 can move along the T-shaped ring groove 13. The setting of the moving wheel 14 can make the movement smoother and avoid the rotation deviation of the rotating ring 8. At the same time, the rotating ring 8 can be suspended below the sieve plate tower plate 7.

[0027] Preferably, the position adjustment mechanism further comprises a horizontal tube, one end of which is connected to the bottom end of the lower connecting tube 5 , and the other end of which extends to below the rotating ring 8 .

[0028] The arrangement of the horizontal pipe can restore the flow direction of the liquid raw material to a horizontal direction, so as to be suitable for the application requirements of the cryogenic distillation tower 1 .

[0029] Preferably, the position adjustment mechanism also includes a second electric push rod 15, the horizontal tube includes a fixed tube 16, a corrugated telescopic tube 17, a movable tube 18 and a connecting plate 19, the fixed tube 16, the corrugated telescopic tube 17 and the movable tube 18 are connected in sequence, the bottom end of the lower connecting tube 5 is connected to the end of the fixed tube 16, the connecting plate 19 is arranged on the top surface of the movable tube 18, the second electric push rod 15 is arranged on the inner wall of the rotating ring 8, and its output shaft is connected to the side wall of the connecting plate 19.

[0030] The length of the horizontal pipe is set to be adjustable so as to change the position of the liquid inlet, wherein the second electric push rod 15 can drive the movable pipe 18 to move through the connecting plate 19, so that the bellows telescopic pipe 17 is stretched or compressed, and the liquid raw material transported by the lower connecting pipe 5 can be transported from the fixed pipe 16, the bellows telescopic pipe 17 and the movable pipe 18 to the interior of the low-temperature distillation tower 1 to achieve the adjustment of the liquid inlet position.

[0031] Preferably, it further comprises a valve 20 , which is arranged on the liquid inlet pipe 2 .

[0032] The valve 20 is used to close and open the liquid inlet pipe 2 so as to adjust the liquid inlet position.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cryogenic liquid gas purification device, characterized in that: It includes a low-temperature distillation tower, a liquid inlet pipe, a spring pipe, an upper connecting pipe, a lower connecting pipe and a position adjustment mechanism, one end of the liquid inlet pipe extends into the low-temperature distillation tower, the upper connecting pipe is connected to the end of the liquid inlet pipe located in the low-temperature distillation tower, the bottom end of the upper connecting pipe is connected to the top surface of the spring pipe, and the top of the lower connecting pipe is connected to the bottom surface of the spring pipe; the position adjustment mechanism includes a first electric push rod, a sieve plate tower plate, a rotating ring, a rotating motor, a gear and a rack, the first electric push rod is symmetrically arranged on the top surface of the low-temperature distillation tower, and its output shaft is connected to the top surface of the sieve plate tower plate, the rotating ring is arranged below the sieve plate tower plate, and its top surface is slidably connected to the bottom surface of the sieve plate tower plate, the rack is arranged on the inner circumferential surface of the rotating ring and is distributed in a ring shape, the rotating motor is arranged on the sieve plate tower plate, and its output shaft passes downward through the sieve plate tower plate and is connected to the gear, the gear is meshed with the rack, and the outer wall of the lower connecting pipe is connected to the outer circumferential surface of the rotating ring.

2. A cryogenic liquid gas purification device according to claim 1, characterized in that: The top surface of the rotating ring is provided with a T-shaped sliding block, the bottom surface of the sieve plate tower plate is provided with a T-shaped ring groove, and the T-shaped sliding block is located in the T-shaped ring groove.

3. A cryogenic liquid gas purification device according to claim 2, characterized in that: The position adjustment mechanism also includes a moving wheel, which is arranged on the bottom surface of the horizontal section of the T-shaped sliding block and contacts the inner bottom surface of the T-shaped ring groove.

4. A cryogenic liquid gas purification device according to claim 1, characterized in that: The position adjustment mechanism also includes a horizontal tube, one end of which is connected to the bottom end of the lower connecting tube, and the other end of which extends below the rotating ring.

5. A cryogenic liquid gas purification device according to claim 4, characterized in that: The position adjustment mechanism also includes a second electric push rod, the horizontal tube includes a fixed tube, a corrugated telescopic tube, a movable tube and a connecting plate, the fixed tube, the corrugated telescopic tube and the movable tube are connected in sequence, the bottom end of the lower connecting tube is connected to the end of the fixed tube, the connecting plate is arranged on the top surface of the movable tube, the second electric push rod is arranged on the inner side wall of the rotating ring, and its output shaft is connected to the side wall of the connecting plate.

6. A cryogenic liquid gas purification device according to claim 1, characterized in that: The device also comprises a valve, which is arranged on the liquid inlet pipe.

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