A denitrification treatment device for liquefied natural gas

Abstract

This utility model relates to the field of natural gas denitrification technology and proposes a liquefied natural gas denitrification treatment device, including: a support frame; a tank body and an outer cylinder respectively through and fixedly installed on both sides of the inner wall of the support frame; a heater fixedly installed on the inner side wall of the tank body; a spring tube fixedly installed inside the tank body; an inner cylinder fixedly installed inside the outer cylinder; a rotating rod rotatably connected to both sides of the inner wall of the inner cylinder. Through the spring tube, the inner cylinder, the spiral blade, and the heater, natural gas enters the spring tube from the inlet pipe at one end of the tank body. The spring tube is in a heat-conducting liquid to heat the natural gas inside. The heated natural gas enters the inner cylinder through a connecting pipe. When the natural gas passes through the carbon molecular sieve inside the inner cylinder, the carbon molecular sieve adsorbs nitrogen in the natural gas. The carbon molecular sieve is distributed throughout the interior of the inner cylinder. The natural gas moves slowly around the spiral blade to prolong the contact time with the carbon molecular sieve, thereby fully adsorbing nitrogen in the natural gas.

Description

Technical Field

[0001] This utility model relates to the field of natural gas denitrification technology, specifically to a liquefied natural gas denitrification treatment device. Background Technology

[0002] Nitrogen removal from liquefied natural gas is a key step in the natural gas processing, with the main purpose of improving energy efficiency, ensuring production safety, and meeting environmental protection requirements.

[0003] A Chinese public utility model patent (Announcement No.: CN219507874U) discloses a natural gas denitrification mechanism, comprising a heating chamber and an adsorption chamber. A natural gas inlet pipe is fixedly connected to one side of the heating chamber, and a connecting pipe is fixedly connected to the other side. Both the natural gas inlet pipe and the connecting pipe penetrate the side wall of the heating chamber. A heating pipe is fixedly connected to one end of the natural gas inlet pipe and the connecting pipe. A heat-conducting liquid is provided inside the heating chamber, and a heater is provided on the inner bottom side wall of the heating chamber. The adsorption chamber is filled with carbon molecular sieves, and a door is provided on the side wall of the adsorption chamber. One end of the connecting pipe penetrates the side wall of the adsorption chamber and is located inside the adsorption chamber. This utility model is reasonably designed and ingeniously conceived. By heating the natural gas in a water bath, the natural gas can be heated uniformly and stably, ensuring the adsorption effect of the carbon molecular sieve on nitrogen in the natural gas.

[0004] However, in implementing the relevant technology, the following problems were found in the above-mentioned natural gas denitrification mechanism: In the existing technology, the contact time between natural gas and carbon molecular sieve is increased by baffles. However, the number of baffles is small and the structure is simple, which makes it necessary to extend the contact time between natural gas and carbon molecular sieve. Therefore, a liquefied natural gas denitrification treatment device is proposed. Utility Model Content

[0005] This invention proposes a denitrification treatment device for liquefied natural gas, which solves the problem in related technologies where the number of baffles is small and the structure is simple, thus requiring a longer contact time between natural gas and carbon molecular sieves.

[0006] The technical solution of this utility model is as follows: A liquefied natural gas denitrification treatment device, comprising: A bracket is fixedly installed through the tank and the outer cylinder on both sides of the inner wall of the bracket, and a heater is fixedly installed on the inner wall of the tank. A spring tube is fixedly installed inside the tank body; The inner cylinder is fixedly installed inside the outer cylinder; A rotating rod is rotatably connected to both sides of the inner wall of the inner cylinder, and a spiral blade is fixedly installed on the outer wall of the rotating rod.

[0007] Preferably, a motor is fixedly installed on the outer wall of the inner cylinder, and a synchronous pulley is fixedly connected to the output end of the motor.

[0008] Preferably, one end of the rotating rod passes through the inner cylinder and is fixedly connected to a second synchronous pulley, and the first synchronous pulley is meshed with the outer side wall of the second synchronous pulley by a synchronous belt.

[0009] Preferably, a pump body is fixedly installed at one end of the tank body, the input end of the pump body extends into the interior of the tank body through liquid pumping, the output end of the pump body is fixedly connected to a delivery pipe, one end of the delivery pipe is connected to the outer cylinder, and a one-way pipe is fixedly installed on the outer wall of the tank body, one end of the one-way pipe is connected to the outer cylinder.

[0010] Preferably, a connecting pipe is fixedly connected to one end of the tank body, one end of the connecting pipe passes through the tank body and communicates with the spring tube, and the other end of the connecting pipe is communicated with the inner cylinder.

[0011] Preferably, an exhaust pipe is fixedly installed on the outer wall of the inner cylinder, and a valve is installed on the outer wall of the exhaust pipe.

[0012] Preferably, a feed pipe is fixedly installed at the top of the inner cylinder, and a discharge pipe is fixedly installed at the bottom of the inner cylinder. Valves are installed on the outer walls of the feed pipe and the discharge pipe, respectively.

[0013] The working principle and beneficial effects of this utility model are as follows: Through the spring tube, inner cylinder, spiral blades, and heater, natural gas enters the spring tube from the inlet pipe at one end of the tank. The spring tube is immersed in a heat-conducting liquid, which heats the natural gas inside. The heated natural gas then enters the inner cylinder through a connecting pipe. As the natural gas passes through the carbon molecular sieve inside the inner cylinder, the carbon molecular sieve adsorbs nitrogen from the natural gas. The carbon molecular sieves are distributed throughout the interior of the inner cylinder. The natural gas moves slowly around the spiral blades, extending the contact time with the carbon molecular sieves, thereby fully adsorbing the nitrogen from the natural gas. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Support; 2. Tank; 3. Heater; 4. Outer cylinder; 5. Inner cylinder; 6. Rotating rod; 7. Spiral blade; 8. Bourdon tube; 9. Motor; 10. Synchronous pulley one; 11. Synchronous pulley two; 12. Pump body; 13. Conveying pipe; 14. One-way pipe; 15. Connecting pipe; 16. Exhaust pipe; 17. Valve one; 18. Feed pipe; 19. Discharge pipe; 20. Valve two. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1 - Figure 3 The present invention provides a liquefied natural gas denitrification treatment device, comprising: The bracket 1 is fixedly installed through the tank 2 and the outer cylinder 4 on both sides of the inner wall of the bracket 1. The inner wall of the tank 2 is fixedly installed with a heater 3, and the inside of the tank 2 is filled with heat-conducting liquid. Spring tube 8 is fixedly installed inside the tank body 2; The inner cylinder 5 is fixedly installed inside the outer cylinder 4, and the interior of the inner cylinder 5 is filled with carbon molecular sieve. Rotating rod 6 is rotatably connected to both sides of the inner wall of inner cylinder 5, and a spiral blade 7 is fixedly installed on the outer wall of rotating rod 6; One end of the tank body 2 is fixedly connected to a connecting pipe 15. One end of the connecting pipe 15 passes through the tank body 2 and is connected to the spring tube 8. The other end of the connecting pipe 15 is connected to the inner cylinder 5. An exhaust pipe 16 is fixedly installed on the outer wall of the inner cylinder 5, and a valve 17 is installed on the outer wall of the exhaust pipe 16. Heater 3 heats the heat-conducting liquid inside tank 2. Natural gas enters spring tube 8 from the inlet pipe at one end of tank 2. Spring tube 8 is in the heat-conducting liquid and heats the natural gas inside. The heated natural gas enters inner cylinder 5 through connecting pipe 15. When the natural gas passes through the carbon molecular sieve inside inner cylinder 5, the carbon molecular sieve adsorbs nitrogen in the natural gas. The natural gas moves around the spiral blade 7 to prolong the contact time with the carbon molecular sieve. Finally, it is discharged through exhaust pipe 16. A filter plate is provided at the connection between exhaust pipe 16 and inner cylinder 5 to prevent the carbon molecular sieve from being discharged through exhaust pipe 16.

[0019] Specifically, a motor 9 is fixedly installed on the outer wall of the inner cylinder 5, and a synchronous pulley 10 is fixedly connected to the output end of the motor 9. One end of the rotating rod 6 passes through the inner cylinder 5 and is fixedly connected to a synchronous pulley 11. A synchronous belt is meshed between the outer walls of the synchronous pulley 10 and the synchronous pulley 11. The output of motor 9 drives synchronous wheel 10 to rotate. Synchronous wheel 10 drives synchronous wheel 11 to rotate via synchronous belt. Synchronous wheel 11 drives rotating rod 6 and spiral blade 7 to rotate, which facilitates the discharge of carbon molecular sieve from inside inner cylinder 5.

[0020] Specifically, a pump body 12 is fixedly installed at one end of the tank body 2. The input end of the pump body 12 extends into the interior of the tank body 2 through liquid pumping. The output end of the pump body 12 is fixedly connected to a delivery pipe 13. One end of the delivery pipe 13 is connected to the outer cylinder 4. A one-way pipe 14 is fixedly installed on the outer wall of the tank body 2. One end of the one-way pipe 14 is connected to the outer cylinder 4. A one-way valve is installed on the outer wall of the one-way pipe 14. Pump 12 transports the heat-conducting liquid inside tank 2 to the inner cavity of outer cylinder 4 through delivery pipe 13, heating the temperature around the carbon molecular sieve inside inner cylinder 5 to improve the adsorption effect. The heat-conducting liquid in the inner cavity of outer cylinder 4 flows back to tank 2 through one-way pipe 14 to achieve a circulation transport effect.

[0021] Specifically, an inlet pipe 18 is fixedly installed at the top of the inner cylinder 5, and a discharge pipe 19 is fixedly installed at the bottom of the inner cylinder 5. Valves 20 are installed on the outer walls of the inlet pipe 18 and the discharge pipe 19, respectively. When replacing the carbon molecular sieve, open valve 20 on the discharge pipe 19. The output of motor 9 drives synchronous wheel 10 to rotate. Synchronous wheel 10 drives synchronous wheel 11 to rotate via synchronous belt. Synchronous wheel 11 drives rotating rod 6 and spiral blade 7 to rotate. Spiral blade 7 transports the carbon molecular sieve to the discharge pipe 19 for discharge. Place the carbon molecular sieve and open valve 20 on the feed pipe 18. The carbon molecular sieve is poured into the feed pipe 18. Under the action of motor 9, rotating rod 6 and spiral blade 7 are driven to rotate. Spiral blade 7 assists in transporting the carbon molecular sieve into the inner cylinder 5 for use. This utility model controls the operation of heater 3, motor 9 and pump body 12 through an external controller.

[0022] Working principle of this utility model: This utility model is a liquefied natural gas denitrification treatment device. First, during use, the heater 3 heats the heat-conducting liquid inside the tank 2. The pump 12 transports the heat-conducting liquid inside the tank 2 to the inner cavity of the outer cylinder 4 through the delivery pipe 13, heating the temperature around the carbon molecular sieve inside the inner cylinder 5. The heat-conducting liquid in the inner cavity of the outer cylinder 4 flows back to the tank 2 through the one-way pipe 14. Natural gas enters the spring tube 8 from the inlet pipe at one end of the tank 2. The spring tube 8 is in the heat-conducting liquid and heats the natural gas inside it. The heated natural gas enters the inner cylinder 5 through the connecting pipe 15. When the natural gas passes through the carbon molecular sieve inside the inner cylinder 5, the carbon molecular sieve adsorbs nitrogen in the natural gas. The natural gas moves around the spiral blade 7 to prolong the contact time with the carbon molecular sieve. Finally, the natural gas is discharged through the exhaust pipe 16.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A liquefied natural gas denitrification treatment device, characterized in that, include: The bracket (1) is fixedly installed through the tank (2) and the outer cylinder (4) on both sides of the inner wall of the bracket (1). The inner side wall of the tank (2) is fixedly installed with a heater (3). A spring tube (8) is fixedly installed inside the tank body (2); The inner cylinder (5) is fixedly installed inside the outer cylinder (4); Rotating rod (6) is rotatably connected to both sides of the inner wall of the inner cylinder (5), and a spiral blade (7) is fixedly installed on the outer wall of the rotating rod (6).

2. The liquefied natural gas denitrification treatment device according to claim 1, characterized in that: A motor (9) is fixedly installed on the outer wall of the inner cylinder (5), and a synchronous pulley (10) is fixedly connected to the output end of the motor (9).

3. The liquefied natural gas denitrification treatment device according to claim 2, characterized in that: One end of the rotating rod (6) passes through the inner cylinder (5) and is fixedly connected to the second synchronous pulley (11). The first synchronous pulley (10) and the outer side wall of the second synchronous pulley (11) are connected by a synchronous belt.

4. The liquefied natural gas denitrification treatment device according to claim 1, characterized in that: A pump body (12) is fixedly installed at one end of the tank (2). The input end of the pump body (12) extends into the interior of the tank (2) by pumping liquid. A delivery pipe (13) is fixedly connected to the output end of the pump body (12). One end of the delivery pipe (13) is connected to the outer cylinder (4). A one-way pipe (14) is fixedly installed on the outer wall of the tank (2). One end of the one-way pipe (14) is connected to the outer cylinder (4).

5. A liquefied natural gas denitrification treatment device according to claim 1, characterized in that: One end of the tank (2) is fixedly connected to a connecting pipe (15). One end of the connecting pipe (15) passes through the tank (2) and connects with the spring tube (8). The other end of the connecting pipe (15) is connected with the inner cylinder (5).

6. A liquefied natural gas denitrification treatment device according to claim 1, characterized in that: An exhaust pipe (16) is fixedly installed on the outer wall of the inner cylinder (5), and a valve (17) is installed on the outer wall of the exhaust pipe (16).

7. The liquefied natural gas denitrification treatment device according to claim 1, characterized in that: The top of the inner cylinder (5) is fixedly installed with a feed pipe (18), and the bottom of the inner cylinder (5) is fixedly installed with a discharge pipe (19). Valves (20) are installed on the outer walls of the feed pipe (18) and the discharge pipe (19).

Images