Low-temperature liquefied gas boil-off gas recovery system

Abstract

The utility model relates to the technical field of low-temperature liquefied gas boil-off gas recovery, in particular to a low-temperature liquefied gas boil-off gas recovery system which comprises a bottom plate, a mounting groove is formed in the right side of the top of the bottom plate, and a low-temperature liquid barrel is mounted on the mounting groove; a cleaning mechanism is mounted in the low-temperature liquid barrel; four supporting columns are installed on the left side of the upper side of the bottom plate in a bilateral symmetry mode, and a carrier gas box is fixedly installed at the tops of the four supporting columns. According to the utility model, the recycled gas enters the carrier gas box and firstly passes through the air filter screen plate of the air filter mechanism, and the activated carbon mounted on the air filter screen plate can adsorb impurities in the recycled gas, so that the purity of the recycled gas is improved; and the handle enables the activated carbon on the air filter screen plate to be more convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature liquefied gas boil-off recovery, in particular to a low-temperature liquefied gas boil-off recovery system. Background Art

[0002] With the large-scale and liquefied air separation equipment, small air separation equipment has been gradually eliminated. Instead, cryogenic liquefied gas filling stations have been established in various places to fill cryogenic insulated gas cylinders and high-pressure gas cylinders. However, the technical problem of how to recover the evaporated gas of cryogenic liquefied gas has arisen.

[0003] A Chinese patent discloses a cryogenic liquefied gas boil-off gas recovery system and compressor (authorization announcement number CN207316460 U). The patented technology can be achieved by using a cryogenic liquid tank truck, a cryogenic liquid storage tank, a cryogenic insulated gas cylinder, a compressor and a high-pressure gas filling bus. The gas phase end of the cryogenic liquid tank truck is connected to the compressor intake pipe through a first branch pipe and a valve V1; the gas phase end of the cryogenic liquid storage tank is connected to the compressor intake pipe through a second branch pipe and a valve V2; an intake pressure gauge, an intake valve V4, a safety valve V5 and an exhaust pressure gauge are arranged on the compressor intake pipe, and the intake valve V4 is used to control the intake pressure of the compressor; a cooling water tank is arranged in the compressor, and a heat exchanger is installed in the cooling water tank, and the cryogenic liquefied gas boil-off gas and the cooling water are indirectly exchanged for heat The reheated gas passes through the first-stage compression, the first-stage cooler, the second-stage compression, and the second-stage cooler of the compressor, and then passes through the buffer tank and the valve V7 discharge pipeline to the high-pressure gas filling bus, which fully utilizes the cold energy and pressure energy of the low-temperature gas and reduces energy consumption. The exhaust temperature of the compressor is significantly lower than the isentropic compression temperature. Running at a low speed also reduces the wear of parts and improves the durability of the machine. However, it is not considered that before the low-temperature liquefied gas evaporates and is recovered, a large amount of impurities will be mixed in the gas. When the external recovered gas carries these impurities into the interior of the recovery device, it is easy to affect the recovery effect of the recovery device.

[0004] Therefore, those skilled in the art provide a cryogenic liquefied gas boil-off gas recovery system to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a low-temperature liquefied gas evaporated gas recovery system, including a base plate, a mounting groove is installed on the top right side of the base plate, a low-temperature liquid barrel is installed on the mounting groove; a cleaning mechanism is installed inside the low-temperature liquid barrel; a support column is installed on the upper left side of the base plate, and the support columns are provided with four symmetrical ones, and a gas carrier box is fixedly installed on the top of the four support columns; a movable groove is opened on the upper left side of the gas carrier box; an air filtering mechanism is installed in the movable groove; sliding grooves are opened on the front and rear inner walls of the gas carrier box.

[0006] Preferably: a liquid inlet is arranged on the upper right side of the low-temperature liquid barrel, and a valve 1 is installed on the liquid inlet; a liquid outlet is arranged on the lower right side of the low-temperature liquid barrel, and a valve 2 is installed on the liquid outlet;

[0007] Preferably: the cleaning mechanism includes a motor, which is installed on the top of the cryogenic liquid barrel; a rotating rod is installed on the lower side of the motor; a number of cleaning leaves are installed on the rotating rod; four groups of cleaning leaves are arranged from top to bottom; a filter plate is installed on the upper side of the uppermost cleaning leaf, and the filter plate can filter out some impurities to a certain extent when the low-temperature liquefied water enters the cryogenic liquid barrel, thereby improving the water quality; a scraper is installed on the upper side of the filter plate, and the scraper is provided with two groups distributed up and down, and the uppermost group of scrapers is close to the top inner wall of the cryogenic liquid barrel, which is convenient for cleaning the dirt on the top inner wall of the cryogenic liquid barrel; when the cleaning mechanism is in operation, the rotating rod is driven to move by the motor, and then the cleaning leaves are driven to rotate in the cryogenic liquid barrel to clean the inner wall of the cryogenic liquid barrel; when the rotating rod moves, the scraper is driven to scrape the filter plate; impurities on the filter plate are removed to avoid affecting the later use effect of the filter plate;

[0008] Preferably: an exhaust pipe is installed on the left side of the cryogenic liquid barrel, an air pump is installed on the left side of the exhaust pipe, and a support rod is installed at the bottom of the air pump to support the air pump; an air delivery pipe is installed on the left side of the air pump, and the terminal of the air delivery pipe is connected to the carrier gas box; the exhaust pipe extracts the low-temperature liquefied gas vapor inside the cryogenic liquid barrel through the air pump, and then transports it to the carrier gas box through the air delivery pipe, so as to complete the recovery of the low-temperature liquefied gas vapor;

[0009] Preferably: the air filter mechanism comprises an air filter plate, and a handle is installed on the left side of the air filter plate; activated carbon is installed inside the air filter plate to absorb impurities in the evaporated gas of low-temperature liquefied gas; sealing gaskets are installed on the inner walls around the air filter plate, and the sealing gaskets can improve the sealing of the air carrier box to avoid gas leakage; limit blocks are installed on the front and rear outer walls of the air filter plate, and the limit blocks are embedded in the slide groove; the slide groove can move left and right in the slide groove; the recovered gas enters the air carrier box and first passes through the air filter plate of the air filter mechanism, and the activated carbon installed on the air filter plate will absorb impurities in the recovered gas to improve the purity of the recovered gas; the handle makes the installation and removal of the activated carbon on the air filter plate more convenient;

[0010] Preferably: a limit groove is formed at the bottom of the gas carrier box, a spring telescopic rod is installed in the limit groove; a strong magnetic plate 1 is installed on the rear side of the spring telescopic rod; a strong magnetic plate 2 is installed on the upper side of the strong magnetic plate 1, the strong magnetic plate 2 is placed on the bottom inner wall of the gas carrier box, and a brush is installed on the bottom of the strong magnetic plate 2; the user can pull the spring telescopic rod and the strong magnetic plate 1 to indirectly drive the strong magnetic plate 2 to slide back and forth in the gas carrier box, and drive the strong magnetic plate 2 to slide on the bottom of the gas carrier box through magnetic force, and then use the brush to clean the sedimentation and attachment generated at the bottom of the gas carrier box, so as to achieve quick cleaning after use; the moving mechanism includes supporting feet; the supporting feet are provided with four mutually symmetrical supporting feet, and the lower sides of the four supporting feet are provided with universal wheels.

[0011] Technical effects and advantages of the utility model:

[0012] 1. The utility model provides a low-temperature liquefied gas evaporation gas recovery system. When the cleaning mechanism is in operation, the motor drives the rotating rod to move, and then drives the cleaning leaves to rotate in the low-temperature liquid barrel to clean the inner wall of the low-temperature liquid barrel; when the rotating rod moves, it drives the scraper to scrape the filter plate; impurities on the filter plate are removed to avoid affecting the later use effect of the filter plate.

[0013] 2. In the utility model, the recovered gas enters the gas carrier box and first passes through the air filter plate of the air filtering mechanism. The activated carbon installed on the air filter plate will adsorb impurities in the recovered gas to improve the purity of the recovered gas; the handle makes the installation and removal of the activated carbon on the air filter plate more convenient.

[0014] 3. In the utility model, the user can pull the spring telescopic rod and the strong magnetic plate one to indirectly drive the strong magnetic plate two to slide back and forth in the gas carrier box, and drive the strong magnetic plate two to slide at the bottom of the gas carrier box through magnetic force, and then use a brush to clean the sediment attachments generated at the bottom of the gas carrier box, thereby achieving quick cleaning after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of a cryogenic liquefied gas boil-off gas recovery system provided in an embodiment of the present application;

[0016] Figure 2 It is a front cross-sectional view of a cryogenic liquefied gas boil-off gas recovery system provided in an embodiment of the present application;

[0017] Figure 3 The present invention provides an explosion protection device in a cryogenic liquefied gas boil-off gas recovery system. Figure 1 ;

[0018] Figure 4 The present invention provides an explosion protection device in a cryogenic liquefied gas boil-off gas recovery system. Figure 2 ;

[0019] Figure 5 The present invention provides an explosion protection device in a cryogenic liquefied gas boil-off gas recovery system. Figure 3 .

[0020] In the figure: 1. bottom plate; 2. supporting feet; 3. universal wheels; 4. low-temperature liquid barrel; 41. mounting slot; 5. liquid inlet; 6. valve one; 7. liquid outlet; 8. valve two; 9. motor; 10. rotating rod; 11. cleaning blade; 12. filter plate; 121. scraper; 13. supporting rod; 14. exhaust pipe; 15. gas pipe; 16. gas carrier box; 161. supporting column; 17. air pump; 18. air filter plate; 181. slide; 19. limit block; 20. handle; 21. sealing pad; 22. moving slot; 23. limit slot; 24. spring telescopic rod; 25. strong magnetic plate one; 26. strong magnetic plate two. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes. Example

[0022] See also Figure 1 to Figure 5 In this embodiment, a low-temperature liquefied gas evaporation gas recovery system is provided, including a bottom plate 1, a mounting groove 41 is installed on the top right side of the bottom plate 1, and a low-temperature liquid barrel 4 is installed on the mounting groove 41; a cleaning mechanism is installed inside the low-temperature liquid barrel 4 to facilitate cleaning the inside of the low-temperature liquid barrel 4; a support column 161 is installed on the upper left side of the bottom plate 1, and the support column 161 is provided with four left-right symmetrical ones, and a gas carrier box 16 is fixedly installed on the top of the four support columns 161; a mobile groove 22 is opened on the upper left side of the gas carrier box 16; an air filtering mechanism is installed in the mobile groove 22 to filter the extracted low-temperature liquefied gas evaporation gas to improve the purity of the gas; a slide groove 181 is opened on the inner walls of the front and rear sides of the gas carrier box 16; a liquid inlet 5 is provided on the upper right side of the low-temperature liquid barrel 4, and a valve one 6 is installed on the liquid inlet 5; a liquid outlet 7 is provided on the lower right side of the low-temperature liquid barrel 4, and a valve two 8 is installed on the liquid outlet 7;

[0023] The cleaning mechanism includes a motor 9, which is installed on the top of the cryogenic liquid barrel 4; a rotating rod 10 is installed on the lower side of the motor 9; a plurality of cleaning leaves 11 are installed on the rotating rod 10; the cleaning leaves 11 are arranged in four groups from top to bottom; a filter plate 12 is installed on the upper side of the uppermost cleaning leaf 11, and the filter plate 12 can filter out some impurities to a certain extent when the low-temperature liquefied water enters the cryogenic liquid barrel 4, thereby improving the quality of the water; a scraper 121 is installed on the upper side of the filter plate 12, and the scraper 121 is provided with two groups distributed up and down, and the uppermost group of scrapers 121 is close to the top inner wall of the cryogenic liquid barrel 4, so as to facilitate the removal of dirt on the top inner wall of the cryogenic liquid barrel 4; when the cleaning mechanism is in operation, the rotating rod 10 is driven to move by the motor 9, and then the cleaning leaves 11 are driven to rotate in the cryogenic liquid barrel 4 to clean the inner wall of the cryogenic liquid barrel 4; when the rotating rod 10 moves, the scraper 121 is driven to scrape the filter plate 12; impurities on the filter plate 12 are removed to avoid affecting the later use effect of the filter plate 12;

[0024] An exhaust pipe 14 is installed on the left side of the cryogenic liquid barrel 4, and an air pump 17 is installed on the left side of the exhaust pipe 14. A support rod 13 is installed at the bottom of the air pump 17 to support the air pump 17; an air delivery pipe 15 is installed on the left side of the air pump 17, and the terminal of the air delivery pipe 15 is connected to the air carrier box 16; the exhaust pipe 14 extracts the low-temperature liquefied gas vapor inside the cryogenic liquid barrel 4 through the air pump 17, and then transports it to the air carrier box 16 through the air delivery pipe 15, completing the recovery of the low-temperature liquefied gas vapor;

[0025] The air filtering mechanism comprises an air filter plate 18, and a handle 20 is installed on the left side of the air filter plate 18; activated carbon is installed inside the air filter plate 18 to absorb impurities in the evaporated gas of the low-temperature liquefied gas; sealing gaskets 21 are installed on the inner walls around the air filter plate 18, and the sealing gaskets 21 can improve the sealing performance of the carrier gas box 16 to avoid gas leakage; limit blocks 19 are installed on the outer walls on both sides of the front and rear sides of the air filter plate 18, and the limit blocks 19 are embedded in the slide groove 181; the slide groove 181 can move left and right in the slide groove 181; the recovered gas enters the carrier gas box 16 and first passes through the air filter plate 18 of the air filtering mechanism, and the activated carbon installed on the air filter plate 18 will absorb impurities in the recovered gas to improve the purity of the recovered gas; the handle 20 makes the installation and removal of the activated carbon on the air filter plate 18 more convenient;

[0026] A limiting groove 23 is provided at the bottom of the gas carrier box 16, and a spring telescopic rod 24 is installed in the limiting groove 23; a strong magnetic plate 25 is installed on the rear side of the spring telescopic rod 24; a strong magnetic plate 26 is installed on the upper side of the strong magnetic plate 25, and the strong magnetic plate 26 is placed on the bottom inner wall of the gas carrier box 16, and a brush is installed at the bottom of the strong magnetic plate 26; the user can indirectly drive the strong magnetic plate 26 to slide back and forth in the gas carrier box 16 by pulling the spring telescopic rod 24 and the strong magnetic plate 1 25, and drive the strong magnetic plate 26 to slide at the bottom of the gas carrier box 16 by magnetic force, and then use the brush to clean the sediment attachments generated at the bottom of the gas carrier box 16, so as to achieve rapid cleaning after use;

[0027] The moving mechanism comprises a supporting foot 2 ; the supporting foot 2 is provided with four mutually symmetrical ones, and universal wheels 3 are installed on the lower sides of the four supporting feet 2 ; the moving mechanism can complete the movement of the entire device through the universal wheels 3 .

[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A cryogenic liquefied gas boil-off gas recovery system, characterized in that: It comprises a bottom plate (1), a mounting groove (41) is mounted on the top right of the bottom plate (1), and a low-temperature liquid barrel (4) is mounted on the mounting groove (41); A cleaning mechanism is installed inside the low-temperature liquid barrel (4); A support column (161) is installed on the upper left side of the bottom plate (1), and four support columns (161) are provided in a left-right symmetrical manner, and a gas carrier box (16) is fixedly installed on the top of the four support columns (161); The inner walls of the front and rear sides of the gas carrier box (16) are provided with sliding grooves (181); A movable groove (22) is formed on the upper left outer wall of the gas carrier box (16); An air filtering mechanism is installed in the movable groove (22).

2. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: A liquid inlet (5) is arranged on the upper right side of the low-temperature liquid barrel (4), and a valve 1 (6) is installed on the liquid inlet (5); a liquid outlet (7) is arranged on the lower right side of the low-temperature liquid barrel (4), and a valve 2 (8) is installed on the liquid outlet (7).

3. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: The cleaning mechanism comprises a motor (9), wherein the motor (9) is mounted on the top of a low-temperature liquid barrel (4); a rotating rod (10) is mounted on the lower side of the motor (9); a plurality of cleaning leaves (11) are mounted on the rotating rod (10); the cleaning leaves (11) are arranged in four groups from top to bottom, and a filter plate (12) is mounted on the upper side of the cleaning leaves (11) at the top layer; a scraper (121) is mounted on the upper side of the filter plate (12), and the scraper (121) is provided with two groups distributed up and down, and the uppermost group of scrapers (121) is in close contact with the top inner wall of the low-temperature liquid barrel (4).

4. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: An exhaust pipe (14) is installed on the left side of the low-temperature liquid barrel (4), an air pump (17) is installed on the left side of the exhaust pipe (14), and a support rod (13) is installed at the bottom of the air pump (17) for supporting the air pump (17); an air supply pipe (15) is installed on the left side of the air pump (17), and the terminal of the air supply pipe (15) is connected to the air carrier box (16).

5. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: The air filtering mechanism comprises an air filter plate (18), a handle (20) is installed on the left side of the air filter plate (18); activated carbon is installed inside the air filter plate (18); sealing gaskets (21) are installed on the inner walls around the air filter plate (18); and limit blocks (19) are installed on the outer walls on both sides of the front and rear sides of the air filter plate (18), and the limit blocks (19) are embedded in the slide groove (181).

6. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: A limiting groove (23) is provided at the bottom of the gas carrier box (16), and a spring telescopic rod (24) is installed in the limiting groove (23); a strong magnetic plate 1 (25) is installed on the rear side of the spring telescopic rod (24); a strong magnetic plate 2 (26) is installed on the upper side of the strong magnetic plate 1 (25), and the strong magnetic plate 2 (26) is placed on the bottom inner wall of the gas carrier box (16), and a brush is installed on the bottom of the strong magnetic plate 2 (26).

7. A cryogenic liquefied gas boil-off gas recovery system according to claim 1, characterized in that: It also comprises a moving mechanism, which comprises a supporting foot (2); the supporting foot (2) is provided with four mutually symmetrical supporting feet, and universal wheels (3) are installed on the lower sides of the four supporting feet (2).

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