Energy-saving CNG pressure reducing and purifying integrated device

Abstract

The utility model relates to natural gas pressure reduction and purification integrated equipment technical field discloses an energy -conserving type CNG pressure reduction and purification integrated device, including base, the inner wall of base evenly fixedly connected with support seat, the top of support seat is provided with the tracheal passage symmetrically, one end fixedly connected with the air inlet pipe of tracheal passage, the other end fixedly connected with the air outlet pipe of tracheal passage, one side fixedly connected with the support plate of base, the top of support plate is provided with the cylinder, the inside fixedly connected with the conical body of cylinder, the inside evenly seted up of conical body has the hole groove, the hole groove in conical body is provided with the movable rod, in the utility model, the gas of cylinder bottom flows into the upper portion of conical body and triethylene glycol solution contact through hole groove, the hydroxyl in triethylene glycol solution combines through hydrogen bond and water molecule, forms physical absorption effect, absorbs the moisture containing in natural gas, realizes the dehydration of natural gas.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated natural gas pressure reduction and purification equipment, and in particular to an energy-saving integrated CNG pressure reduction and purification device. Background Technology

[0002] Natural gas in CNG storage cylinders is often stored or transported under high pressure, while the pressure required for engine intake or residential pipelines is usually lower. Therefore, pressure reducing and purification devices are needed to convert high-pressure CNG into low-pressure, clean natural gas suitable for residential, commercial, or engine use, while ensuring the safe and stable operation of the system.

[0003] Existing integrated CNG depressurization and purification devices cannot automatically adjust the contact between gas and triethylene glycol solution based on the gas pressure at the bottom of the cylinder when using triethylene glycol solution for natural gas dehydration and purification. When the pressure does not reach the set value, they cannot effectively prevent triethylene glycol solution from entering the gas channel, resulting in an unstable and unreliable dehydration process and waste of triethylene glycol solution. Furthermore, existing integrated depressurization and purification devices lack real-time monitoring of the water molecule content of natural gas in the exhaust pipe, and cannot inject fresh triethylene glycol in a timely manner to ensure the subsequent dehydration effect. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an energy-saving integrated CNG depressurization and purification device, which aims to improve the existing integrated CNG depressurization and purification devices. These devices cannot automatically adjust the contact between the gas and the triethylene glycol solution according to the gas pressure at the bottom of the cylinder. When the pressure does not reach the set value, they cannot effectively prevent the triethylene glycol solution from entering the gas channel, resulting in an unstable and unreliable dehydration process and waste of triethylene glycol solution.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving integrated CNG decompression and purification device, comprising a base, a support seat uniformly fixedly connected to the inner wall of the base, an air pipe channel symmetrically arranged on the top of the support seat, an air inlet pipe fixedly connected to one end of the air pipe channel, an air outlet pipe fixedly connected to the other end of the air pipe channel, a support plate fixedly connected to one side of the base, a cylinder provided on the top of the support plate, a conical body fixedly connected inside the cylinder, slots uniformly opened inside the conical body, a movable rod provided in the slots of the conical body, an inverted conical cap fixedly connected to the top of the movable rod, a limiting plate fixedly connected to the bottom of the movable rod, and a stirring assembly provided inside the cylinder.

[0006] By adopting the above technical solution, low-pressure natural gas flows into the interior of the cylinder through the guide pipe. Since the interior of the cylinder is filled with triethylene glycol solution, when the gas pressure at the bottom of the cylinder accumulates to a set value, the limit plate will drive the movable rod to move upward, the inverted conical cap will move upward and open the slot, allowing the gas at the bottom of the cylinder to flow into the upper part of the conical body through the slot and come into contact with the triethylene glycol solution. The hydroxyl groups in the triethylene glycol solution combine with water molecules through hydrogen bonds to form a physical absorption effect, absorbing the water contained in the natural gas and achieving the dehydration of the natural gas.

[0007] When the gas pressure at the bottom of the cylinder does not accumulate to the set value, the inverted conical cap and the groove form a conical seal, preventing the triethylene glycol solution from flowing into the bottom of the cylinder. This avoids the triethylene glycol solution from entering the gas channel unnecessarily, ensuring the stability and reliability of the dehydration process, and also reducing the waste of triethylene glycol solution.

[0008] Preferably, the stirring assembly includes an electric motor, the bottom of which is fixedly connected to the top of the cylinder, and a rotating rod is fixedly connected to the output end of the electric motor, the rotating rod being disposed through the interior of the conical body.

[0009] Preferably, stirring blades are uniformly fixedly connected to the outer wall of the rotating rod, and fan blades are uniformly fixedly connected to the bottom end of the rotating rod.

[0010] Preferably, one end of the air outlet pipe is fitted with a guide pipe via a flange, and one end of the guide pipe is fixedly connected to one side of the cylinder.

[0011] Preferably, an exhaust pipe is fixedly connected to the other side of the cylinder, and a water molecule detection probe is installed inside the exhaust pipe.

[0012] Preferably, an injection pipe is fixedly connected to the top of the cylinder, and a drain pipe is fixedly connected to one side of the cylinder.

[0013] Preferably, an inlet ball valve is symmetrically arranged at one end of the air passage near the inlet pipe, and an outlet ball valve is symmetrically arranged at one end of the air passage near the outlet pipe.

[0014] Preferably, a pressure regulator and a pressure reducing valve are symmetrically arranged on the outer wall of the tracheal passage, and a pressure gauge is provided on one side of the tracheal passage.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, low-pressure natural gas flows into the interior of the cylinder through the guide pipe. Since the interior of the cylinder is filled with triethylene glycol solution, when the gas pressure at the bottom of the cylinder accumulates to a set value, the limiting plate will drive the movable rod to move upward, the inverted conical cap will move upward and open the slot, so that the gas at the bottom of the cylinder flows into the upper part of the conical body through the slot and comes into contact with the triethylene glycol solution. The hydroxyl groups in the triethylene glycol solution combine with water molecules through hydrogen bonds to form a physical absorption effect, absorbing the water contained in the natural gas and realizing the dehydration of the natural gas.

[0017] 2. In this utility model, when the gas pressure at the bottom of the cylinder has not accumulated to the set value, the inverted conical cap and the groove form a conical seal to prevent the triethylene glycol solution from flowing into the bottom of the cylinder. This avoids the triethylene glycol solution from entering the gas channel unnecessarily, ensuring the stability and reliability of the dehydration process, and also reducing the waste of triethylene glycol solution.

[0018] 3. In this utility model, the gas after decompression and dehydration will flow out through the exhaust pipe. The water molecule detection probe can detect the water molecule content of the natural gas in the exhaust pipe in real time, and the data can be displayed by an external water molecule detector. When the water content is detected to be too high, fresh triethylene glycol can be injected through the injection pipe to improve the absorption capacity and ensure the subsequent dehydration effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an energy-saving integrated CNG decompression and purification device proposed in this utility model;

[0020] Figure 2 This is a partial structural diagram of the tracheal channel of an energy-saving CNG decompression and purification integrated device proposed in this utility model;

[0021] Figure 3 This is a partial structural diagram of the cylinder of an energy-saving CNG depressurization and purification integrated device proposed in this utility model;

[0022] Figure 4 This is a partial structural diagram of the stirring blade of an energy-saving CNG decompression and purification integrated device proposed in this utility model;

[0023] Figure 5 This is a partial structural diagram of the conical body of an energy-saving CNG decompression and purification integrated device proposed in this utility model.

[0024] Legend:

[0025] 1. Base; 2. Support seat; 3. Air pipe channel; 4. Air inlet pipe; 5. Air outlet pipe; 6. Inlet ball valve; 7. Outlet ball valve; 8. Pressure regulator; 9. Pressure reducing valve; 10. Pressure gauge; 11. Support plate; 12. Cylinder; 13. Conical body; 14. Motor; 15. Rotating rod; 16. Stirring blade; 17. Fan blade; 18. Groove; 19. Movable rod; 20. Inverted conical cap; 21. Limiting plate; 22. Flange; 23. Guide pipe; 24. Exhaust pipe; 25. Water molecule detection probe; 26. Injection pipe; 27. Drain pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Reference Figures 1-5 This utility model provides an embodiment of an energy-saving integrated CNG decompression and purification device, comprising a base 1, a support seat 2 uniformly fixedly connected to the inner wall of the base 1, an air pipe channel 3 symmetrically arranged on the top of the support seat 2, an air inlet pipe 4 fixedly connected to one end of the air pipe channel 3, an air outlet pipe 5 fixedly connected to the other end of the air pipe channel 3, a support plate 11 fixedly connected to one side of the base 1, a cylinder 12 arranged on the top of the support plate 11, a conical body 13 fixedly connected inside the cylinder 12, slots 18 uniformly opened inside the conical body 13, a movable rod 19 arranged in the slots 18 of the conical body 13, an inverted conical cap 20 fixedly connected to the top of the movable rod 19, a limiting plate 21 fixedly connected to the bottom of the movable rod 19, and a stirring assembly arranged inside the cylinder 12.

[0028] Specifically, during the dehydration treatment of depressurized natural gas, low-pressure natural gas flows into the interior of cylinder 12 through guide pipe 23. Since the interior of cylinder 12 contains triethylene glycol solution, which is located at the top of cone 13, when the gas pressure at the bottom of cylinder 12 accumulates to a set value, the limit plate 21 will move the movable rod 19 upward, and the inverted conical cap 20 will move upward accordingly, opening the slot 18. This allows the gas at the bottom of cylinder 12 to flow into the upper part of cone 13 through slot 18, bringing the low-pressure natural gas into contact with the triethylene glycol solution. The hydroxyl groups in the triethylene glycol solution combine with water molecules through hydrogen bonds, forming a physical absorption effect, absorbing the water contained in the natural gas, and thus achieving the dehydration of the natural gas.

[0029] When the gas pressure at the bottom of the cylinder 12 has not accumulated to the set value, the limit plate 21 will not drive the movable rod 19 to move upward. The inverted conical cap 20 and the groove 18 form a conical seal to prevent the triethylene glycol solution from flowing into the bottom of the cylinder 12. This avoids the triethylene glycol solution from entering the gas channel unnecessarily, ensuring the stability and reliability of the dehydration process, and also reducing the waste of triethylene glycol solution.

[0030] Reference Figures 2-4 The stirring assembly includes a motor 14, the bottom of which is fixedly connected to the top of the cylinder 12. A rotating rod 15 is fixedly connected to the output end of the motor 14. The rotating rod 15 is disposed inside the cone 13. Stirring blades 16 are uniformly fixedly connected to the outer wall of the rotating rod 15. Fan blades 17 are uniformly fixedly connected to the bottom end of the rotating rod 15.

[0031] Specifically, during the dehydration process, the motor 14 operates to drive the rotating rod 15 to rotate the stirring blades 16 and fan blades 17. The stirring blades 16 rotate at high speed inside the cylinder 12, forming forced convection, which allows the triethylene glycol solution to fully contact the water vapor in the natural gas, breaking the static layer on the solution surface, reducing the gas-liquid mass transfer resistance, accelerating the diffusion of water molecules from the gas phase to the liquid phase, avoiding local solution saturation, and enhancing the water absorption capacity of triethylene glycol.

[0032] The turbulence generated by the rotation of fan blade 17 disperses the gas evenly, and the high-speed airflow generated at the edge of the blade cuts the gas into tiny bubbles and propels the gas to flow in a spiral upward manner.

[0033] Reference Figure 2 One end of the exhaust pipe 5 is fitted with a guide pipe 23 via a flange 22, and one end of the guide pipe 23 is fixedly connected to one side of the cylinder 12.

[0034] Specifically, through the cooperation of the guide pipe 23 and the gas outlet pipe 5, the depressurized high-pressure gas can be jointly transported into the cylinder 12, which facilitates the subsequent dehydration treatment of the low-pressure natural gas.

[0035] Reference Figures 1-4 An exhaust pipe 24 is fixedly connected to the other side of the cylinder 12. A water molecule detection probe 25 is installed inside the exhaust pipe 24. An injection pipe 26 is fixedly connected to the top of the cylinder 12. A drain pipe 27 is fixedly connected to one side of the cylinder 12.

[0036] Specifically, the gas after dehydration under reduced pressure will flow out through the exhaust pipe 24. The water molecule detection probe 25 can detect the water molecule content of the natural gas in the exhaust pipe 24 in real time. The water molecule detection probe 25 is model DMT143 and is connected to an external water molecule detector to display the data. The water molecule detector is model CSY-K3. When the water content is detected to be too high, fresh triethylene glycol can be injected through the injection pipe 26 to improve the absorption capacity and ensure the subsequent dehydration effect.

[0037] Reference Figures 1-2 An inlet ball valve 6 is symmetrically arranged at one end of the air pipe channel 3 near the inlet pipe 4, and an outlet ball valve 7 is symmetrically arranged at one end of the air pipe channel 3 near the outlet pipe 5. A pressure regulator 8 and a pressure reducing valve 9 are symmetrically arranged on the outer wall of the air pipe channel 3 in sequence, and a pressure gauge 10 is arranged on one side of the air pipe channel 3.

[0038] Specifically, when reducing the pressure of high-pressure natural gas, the high-pressure natural gas flows into the gas pipe channel 3 through the inlet pipe 4. With the cooperation of the pressure regulator 8 and the pressure reducing valve 9, the pressure of the high-pressure natural gas is reduced step by step, so that the natural gas pressure is reduced to the low pressure value required by subsequent processes or equipment.

[0039] Working principle: When the high-pressure natural gas is depressurized and purified, the high-pressure natural gas first flows into the gas pipe channel 3 through the gas inlet pipe 4. With the cooperation of the pressure regulator 8 and the pressure reducing valve 9, the pressure of the high-pressure natural gas is reduced step by step, so that the pressure of the natural gas is reduced to the low pressure value required by the subsequent process or equipment.

[0040] Low-pressure natural gas is transported into the interior of cylinder 12 through outlet pipe 5 and guide pipe 23. Since the interior of cylinder 12 is filled with triethylene glycol solution, which is located in the upper part of cone 13, when the gas pressure at the bottom of cylinder 12 accumulates to a set value, the limit plate 21 will move the movable rod 19 upward, and the inverted cone cap 20 will move upward accordingly, opening the slot 18. This allows the gas at the bottom of cylinder 12 to flow into the upper part of cone 13 through slot 18, so that the low-pressure natural gas comes into contact with the triethylene glycol solution. The hydroxyl groups in the triethylene glycol solution combine with water molecules through hydrogen bonds to form a physical absorption effect, absorbing the water contained in the natural gas and achieving dehydration of the natural gas. The dew point of the dehydrated natural gas can be reduced to below -10℃, meeting the requirements of pipeline transportation or engine combustion.

[0041] When the gas pressure at the bottom of the cylinder 12 has not accumulated to the set value, the limit plate 21 will not drive the movable rod 19 to move upward. The inverted conical cap 20 and the groove 18 form a conical seal to prevent the triethylene glycol solution from flowing into the bottom of the cylinder 12. This avoids the triethylene glycol solution from entering the gas channel unnecessarily, ensuring the stability and reliability of the dehydration process, and also reducing the waste of triethylene glycol solution.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving integrated CNG pressure reduction and purification device, comprising a base (1), characterized in that: The inner wall of the base (1) is uniformly fixedly connected to a support seat (2). The top of the support seat (2) is symmetrically provided with an air pipe channel (3). One end of the air pipe channel (3) is fixedly connected to an air inlet pipe (4). The other end of the air pipe channel (3) is fixedly connected to an air outlet pipe (5). One side of the base (1) is fixedly connected to a support plate (11). The top of the support plate (11) is provided with a cylinder (12). The inside of the cylinder (12) is fixedly connected to a cone (13). The inside of the cone (13) is uniformly provided with slots (18). A movable rod (19) is provided in the slots (18) of the cone (13). The top of the movable rod (19) is fixedly connected to an inverted conical cap (20). The bottom of the movable rod (19) is fixedly connected to a limiting plate (21). The inside of the cylinder (12) is provided with a stirring assembly.

2. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: The stirring assembly includes an electric motor (14), the bottom of which is fixedly connected to the top of the cylinder (12), and a rotating rod (15) is fixedly connected to the output end of the electric motor (14), the rotating rod (15) being disposed inside the conical body (13).

3. The energy-saving integrated CNG pressure reduction and purification device according to claim 2, characterized in that: The outer wall of the rotating rod (15) is uniformly fixed with stirring blades (16), and the bottom end of the rotating rod (15) is uniformly fixed with fan blades (17).

4. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: One end of the air outlet pipe (5) is fitted with a guide pipe (23) through a flange (22), and one end of the guide pipe (23) is fixedly connected to one side of the cylinder (12).

5. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: An exhaust pipe (24) is fixedly connected to the other side of the cylinder (12), and a water molecule detection probe (25) is installed inside the exhaust pipe (24).

6. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: A liquid injection pipe (26) is fixedly connected to the top of the cylinder (12), and a liquid drain pipe (27) is fixedly connected to one side of the cylinder (12).

7. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: An inlet ball valve (6) is symmetrically provided at one end of the air passage (3) near the inlet pipe (4), and an outlet ball valve (7) is symmetrically provided at one end of the air passage (3) near the outlet pipe (5).

8. The energy-saving integrated CNG pressure reduction and purification device according to claim 1, characterized in that: The outer wall of the tracheal passage (3) is symmetrically provided with a pressure regulator (8) and a pressure reducing valve (9), and a pressure gauge (10) is provided on one side of the tracheal passage (3).

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