Safety ionic liquid hydrogen compressor with telescopic piston cylinder

Abstract

The application provides a safe ionic liquid hydrogen compressor of a telescopic piston cylinder, which comprises a gas passage and a liquid passage. The gas passage comprises a gas inlet assembly, a cylinder and a gas outlet assembly which are sequentially connected. The liquid passage comprises the cylinder, a liquid outlet pipeline, an ionic liquid cylinder and a liquid inlet pipeline which are sequentially connected. The liquid inlet pipeline is connected with the cylinder. The inner cylinder wall of the cylinder is sequentially connected with an elastic assembly and a baffle. The cylinder is provided with a piston. The piston is arranged on the inner side of the baffle. The piston is connected with a piston rod. The piston is provided with ionic liquid. The piston rod penetrates through the cylinder. The liquid inlet pipeline is provided with a driving pump. The liquid outlet pipeline is provided with a liquid outlet valve. The normal work of the reciprocating compressor can be well ensured, and the long-distance pipeline transportation task of hydrogen energy in China is facilitated.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to a safety-type ionic liquid hydrogen compressor with a retractable piston cylinder. Background Technology

[0002] In the entire hydrogen energy industry chain, the compressor, as the largest moving piece of equipment, is also the most complex and has the highest failure rate. Therefore, the safety and efficiency of the compressor directly affect the development of the entire hydrogen energy industry chain.

[0003] Currently, common hydrogen compressors on the market include diaphragm compressors and reciprocating piston compressors. However, due to the flammability and explosiveness of hydrogen, the requirements for the compressor's sealing and explosion-proof performance are more stringent. The emerging ionic liquid compressor, by using an "ionic liquid piston" to compress the gas, can significantly increase compression efficiency, enhance heat exchange, and substantially improve sealing.

[0004] However, the compression scheme of adding an ionic liquid to a reciprocating compressor still has a problem: at the end of the exhaust phase, when the pressure rises sharply due to liquid accumulation in the cylinder, there is a risk of liquid slugging. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] The compression scheme based on adding an ionic liquid to a reciprocating compressor still has a problem: at the end of the exhaust stage, when the pressure rises sharply due to liquid accumulation in the cylinder, there may be a risk of liquid slugging. This application provides a safe ionic liquid hydrogen compressor with a retractable piston cylinder.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, this application provides a safety-type ionic liquid hydrogen compressor with a retractable piston cylinder, comprising a gas channel and a liquid channel. The gas channel includes an inlet assembly, a cylinder, and an exhaust assembly connected in sequence. The liquid channel includes the cylinder, a drain pipe, an ionic liquid cylinder, and an inlet pipe connected in sequence. The inlet pipe is connected to the cylinder. The cylinder wall, an elastic component, and a baffle are connected in sequence. A piston is disposed inside the cylinder and located inside the baffle. The piston is connected to a piston rod and is loaded with ionic liquid. The piston rod passes through the cylinder. A drive pump is disposed on the inlet pipe, and a drain valve is disposed on the drain pipe.

[0009] Another embodiment provided in this application is as follows: the intake assembly includes an intake pipe and an intake valve, the exhaust assembly includes an exhaust valve and an exhaust pipe, the cylinder includes a cylinder head, the intake valve is disposed on the cylinder head, the exhaust valve is disposed on the cylinder head, and the intake pipe, the intake valve, the cylinder, the exhaust valve and the exhaust pipe are connected in sequence.

[0010] Another embodiment provided in this application is as follows: an ionic liquid filter and a one-way valve are provided on the liquid inlet pipe, the ionic liquid filter, the drive pump and the one-way valve are arranged in sequence along the direction from the ionic liquid cylinder to the liquid inlet pipe, and the drive pump is connected to a motor.

[0011] Another embodiment provided in this application is that the liquid inlet pipe is connected to the cylinder through the air inlet valve.

[0012] Another embodiment provided in this application is: a retainer is provided between the baffle and the inner side of the cylinder head to prevent the baffle from moving up and down.

[0013] Another embodiment provided in this application is: the cylinder includes a cylinder bottom, and the baffle is sealed to the cylinder bottom by a sealing ring.

[0014] Another embodiment provided in this application is that a piston ring is provided between the piston and the baffle.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the retractable piston cylinder safety ionic liquid hydrogen compressor provided in this application are as follows:

[0017] The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder provided in this application incorporates a spring device inside the cylinder. In the event of a liquid slugging risk, the spring device can push the baffle inside the compressor cylinder wall to move towards the cylinder wall, thereby rapidly increasing the volume of the compressor cylinder. This allows the ionic liquid to be discharged from the cylinder, thereby reducing the pressure inside the compressor cylinder and mitigating the risk.

[0018] The retractable piston cylinder safety-type ionic liquid hydrogen compressor provided in this application can effectively ensure the normal operation of reciprocating compressors and contribute to my country's long-distance hydrogen energy pipeline transportation mission. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the safety-type ionic liquid hydrogen compressor with a retractable piston cylinder according to this application;

[0020] Figure 2 This is a three-dimensional schematic diagram of the interior of the safety-type ionic liquid hydrogen compressor with a retractable piston cylinder according to this application.

[0021] Figure 3 This is a schematic diagram of the working principle of the compressor intake stage in this application;

[0022] Figure 4 This is a schematic diagram illustrating the working principle of the compressor's compression and exhaust stages in this application;

[0023] Figure 5 This is a schematic diagram illustrating the working principle of the compressor's liquid discharge stage in this application;

[0024] Figure 6 This is a schematic diagram illustrating the working principle of the compressor's liquid replenishment stage in this application. Detailed Implementation

[0025] In the following, specific embodiments of this application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features from various embodiments can be combined to obtain new implementations, or certain features from some embodiments can be substituted to obtain other preferred implementations.

[0026] See Figures 1-6 This application provides a safety-type ionic liquid hydrogen compressor with a retractable piston cylinder, including a gas channel and a liquid channel. The gas channel includes an inlet assembly, a cylinder 6, and an exhaust assembly connected in sequence. The liquid channel includes the cylinder 6, a drain pipe, an ionic liquid cylinder 16, and an inlet pipe connected in sequence. The inlet pipe is connected to the cylinder 6. The cylinder wall, an elastic component, and a baffle 11 are connected in sequence. A piston 8 is provided inside the cylinder 6 and is located inside the baffle 11. The piston 8 is connected to a piston rod 12 and is loaded with ionic liquid 7. The piston rod 12 passes through the cylinder 6. A drive pump 19 is provided on the inlet pipe, and a drain valve 15 is provided on the drain pipe.

[0027] The drain valve 15 is equipped with a pressure threshold. When the piston 8 moves from the top dead center to the bottom dead center during the intake phase, the pressure in the lower part of the cylinder 6 gradually increases. When the pressure reaches the threshold set by the drain valve 15, the drain valve 15 opens, and the ionic liquid 7 enters the ionic liquid cylinder 16 from the compressor cylinder 6.

[0028] The elastic component here can be a spring 14. Cylinder 6 contains ionic liquid 7, below which is piston 8 and piston rod 12.

[0029] When the pressure inside compressor cylinder 6 increases instantaneously at the end of the exhaust phase, the pressure compresses spring 14, causing baffle 11 to move towards cylinder 6. This results in a short-term increase in the volume inside compressor cylinder 6, leading to a decrease in compressor pressure. Simultaneously, drain valve 15 opens, allowing the ionic liquid 7 discharged to the lower side of compressor cylinder to return to ionic liquid cylinder 16. During the intake phase of the next compressor compression cycle, the ionic liquid in ionic liquid cylinder 16, under the action of pump 19, enters compressor cylinder along with the gas, achieving a replenishment effect.

[0030] Furthermore, the intake assembly includes an intake pipe 1 and an intake valve 2, the exhaust assembly includes an exhaust valve 4 and an exhaust pipe 3, the cylinder 6 includes a cylinder head 5, the intake valve 2 is disposed on the cylinder head 5, the exhaust valve 4 is disposed on the cylinder head 5, and the intake pipe 1, the intake valve 2, the cylinder 6, the exhaust valve 4 and the exhaust pipe 3 are connected in sequence.

[0031] Gas enters the cylinder through the intake valve 2, is compressed, and is discharged from the exhaust pipe 3 through the exhaust valve 4.

[0032] Furthermore, an ionic liquid filter 17 and a one-way valve 20 are provided on the liquid inlet pipe. The ionic liquid filter 17, the drive pump 19 and the one-way valve 20 are arranged in sequence along the direction from the ionic liquid cylinder 16 to the liquid inlet pipe. The drive pump 19 is connected to the motor 18.

[0033] Furthermore, the liquid inlet pipe is connected to the cylinder 6 through the air inlet valve 2.

[0034] Furthermore, a retainer 10 is provided between the baffle 11 and the inner side of the cylinder head 5 to prevent the baffle 11 from moving up and down.

[0035] Furthermore, the cylinder 6 includes a cylinder bottom, and the baffle 11 is sealed to the cylinder bottom by a sealing ring 13. A retainer 10 is provided above the baffle 11 to prevent the baffle 11 from moving up and down, and a sealing ring 13 is installed above the baffle 11 for sealing.

[0036] Furthermore, a piston ring 9 is provided between the piston 8 and the baffle 11. The piston ring 9 on the piston 8 increases the sealing between the piston 8 and the baffle 11.

[0037] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 A safe control method for a retractable piston cylinder ionic liquid hydrogen compressor includes the following methods:

[0038] 1) The working principle of the compressor during the intake stage is as follows:

[0039] Reference Figure 3 During the intake phase, intake valve 2 is open and exhaust valve 4 is closed. Hydrogen gas flows into compressor cylinder 6 through intake pipe 1 and intake valve 2. At this time, because it is the intake phase, the pressure inside the compressor cylinder is not high, so baffle 11 does not move and remains in contact with piston 8 under the action of spring 14. Piston 8 and piston rod 12 move from top dead center to bottom dead center, and compressor cylinder 6 gradually fills with hydrogen gas.

[0040] 2) The working principle of the compressor during the compression and exhaust stages is as follows:

[0041] Reference Figure 4 During the compression phase, intake valve 2 is closed and exhaust valve 4 is closed. At this time, the cylinder is in a closed state. The gas pressure continues to rise to compress the hydrogen. However, although the pressure inside the compressor cylinder is rising, it has not yet reached the deformation pressure of spring 14, so baffle 11 does not move and remains pressed against piston 8 under the action of spring 14. During the exhaust phase, intake valve 2 is closed and exhaust valve 4 is open, and the gas is discharged from the cylinder through exhaust port 3 along exhaust valve 4.

[0042] 3) The working principle of the compressor during the liquid discharge stage is as follows:

[0043] Reference Figure 5 At the end of the exhaust phase, the remaining hydrogen in compressor cylinder 6 is minimal, but piston 8 is still moving towards top dead center. Therefore, compression of the ionic liquid 7 may occur at the end of the exhaust phase. Since liquids are nearly incompressible, the pressure inside compressor cylinder 6 will rise sharply and instantaneously within a short period. At this time, the pressure applied to spring 14 by baffle 11 reaches the deformation limit of spring 14. Spring 14 is compressed, causing baffle 11 to move to the left. The volume of compressor cylinder 6 increases rapidly, and ionic liquid 7 flows through the gap to the lower side of compressor cylinder 6. Since it is already the end of the exhaust phase, the remaining hydrogen in cylinder 6 is minimal, so the portion flowing into the lower side of cylinder 6 with the ionic liquid can be ignored. This achieves the goal of rapidly reducing the pressure inside compressor cylinder 6.

[0044] 4) The working principle of the compressor's liquid replenishment stage is as follows:

[0045] Reference Figure 6 During the intake phase of the next compression cycle, intake valve 2 opens and exhaust valve 4 closes. Piston 8 and piston rod 12 move from top dead center to bottom dead center. At this time, the pressure inside the compressor cylinder decreases, spring 14 returns to its initial state, and baffle 11 is pressed tightly against piston 8 under the action of spring 14. The ionic liquid in ionic liquid cylinder 16, driven by pump 19 driven by motor 18, passes through filter 17 and check valve 20, and enters compressor cylinder 6 together with hydrogen from intake valve 2 to replenish the ionic liquid.

[0046] Although this application has been described above with reference to specific embodiments, those skilled in the art will understand that many modifications can be made to the configurations and details disclosed in this application within the principles and scope of the disclosure. The scope of protection of this application is determined by the appended claims, and the claims are intended to cover all modifications included in the literal meaning or scope of equivalents of the technical features in the claims.

Claims

1. A safety-type ionic liquid hydrogen compressor with a retractable piston cylinder, characterized in that: The device includes a gas channel and a liquid channel. The gas channel includes an intake assembly, a cylinder, and an exhaust assembly connected in sequence. The liquid channel includes the cylinder, a drain pipe, an ionic liquid cylinder, and an inlet pipe connected in sequence. The inlet pipe is connected to the cylinder. The cylinder wall, an elastic component, and a baffle are connected in sequence. A piston is installed inside the cylinder and is located inside the baffle. The piston is connected to a piston rod and is loaded with ionic liquid. The piston rod passes through the cylinder. A drive pump is installed on the inlet pipe, and a drain valve is installed on the drain pipe.

2. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 1, characterized in that: The intake assembly includes an intake pipe and an intake valve, the exhaust assembly includes an exhaust valve and an exhaust pipe, the cylinder includes a cylinder head, the intake valve is disposed on the cylinder head, the exhaust valve is disposed on the cylinder head, and the intake pipe, the intake valve, the cylinder, the exhaust valve and the exhaust pipe are connected in sequence.

3. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 2, characterized in that: An ionic liquid filter and a one-way valve are installed on the liquid inlet pipe. The ionic liquid filter, the drive pump, and the one-way valve are arranged in sequence along the direction from the ionic liquid cylinder to the liquid inlet pipe. The drive pump is connected to a motor.

4. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 3, characterized in that: The liquid inlet pipe is connected to the cylinder through the air inlet valve.

5. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 2, characterized in that: A retainer is provided between the baffle and the inner side of the cylinder head to prevent the baffle from moving up and down.

6. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 5, characterized in that: The cylinder includes a cylinder bottom, and the baffle is sealed to the cylinder bottom by a sealing ring.

7. The safety-type ionic liquid hydrogen compressor with a retractable piston cylinder as described in claim 2, characterized in that: A piston ring is provided between the piston and the baffle.

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