Valve bank unit for marine methanol fuel engine

Abstract

The invention provides a valve group unit for a marine methanol fuel engine. The valve group unit comprises a pipeline system and control equipment, the pipeline system comprises a methanol supply pipeline, a nitrogen purging pipeline and a fresh water pipeline; the nitrogen purging pipeline is used for purging residual methanol fuel remaining in the methanol supply pipeline and inerting the supply pipeline, so that the use safety of the methanol fuel is improved; the fresh water pipeline is used for providing fresh water to be mixed with methanol for combustion, so that the NOX content after methanol combustion can be reduced; the control equipment not only can be used for monitoring and controlling the valve group unit, but also can be used as an equipment signal transfer station for signal interaction between the host and the valve group unit, so as to meet different requirements of hosts of different brands on the valve group unit.

Description

Technical Field

[0001] The present invention relates to the technical field of ship energy utilization, and particularly to a valve group unit for a marine methanol fuel engine. Background Art

[0002] In recent years, with the increasing pressure of ship emissions reduction, the shipping industry has accelerated the exploration of the application of clean fuels. The voice of methanol as an alternative fuel for the low-carbon transformation of the shipping industry is getting higher and higher. At present, the application of methanol on ships is mainly as the fuel of internal combustion engines, and a small number is used as the fuel of fuel cell-powered ships or the raw material for reforming to produce hydrogen. As a renewable substance, methanol is a renewable energy synthesized from raw materials such as coal, natural gas, wood, and garbage, and is considered the preferred clean fuel to replace petroleum fuel. It has a broad application background in fields such as automobiles, non-road machinery, shipping, and power generation. It has the advantages of sufficient supply, low price, and low emissions after combustion, and has received widespread attention.

[0003] The methanol valve group unit is one of the key components of the marine methanol fuel engine supply system. It is arranged between the methanol supply system and the engine, and has functions such as leakage detection, inerting scavenging, manually and automatically cutting off the methanol fuel supply, filtering the methanol fuel entering the engine, and methanol water mixing.

[0004] Therefore, it is necessary to design a valve group unit for a marine methanol fuel engine to meet the above functional requirements. Summary of the Invention

[0005] In view of the requirements for the use of methanol fuel, the present invention provides a valve group unit for a marine methanol fuel engine.

[0006] The technical solution of the present invention is as follows:

[0007] A valve group unit for a marine methanol fuel engine includes a fixed bracket, and is characterized in that a pipeline system and control equipment are installed on the fixed bracket;

[0008] The pipeline system includes a methanol supply pipeline, a nitrogen purge pipeline, and a fresh water pipeline. Among them, the methanol supply pipeline is used to provide fuel for the methanol fuel engine, the nitrogen purge pipeline is used to purge the residual methanol liquid in the methanol fuel supply pipeline, and the fresh water pipeline is used to provide fresh water for mixing with methanol for combustion to reduce the NO X content after methanol combustion;

[0009] The control equipment is used to monitor and control the valve group unit, and at the same time serves as a signal transfer station for the signal interaction between the engine and the valve group unit.

[0010] The two ends of the methanol fuel supply pipeline are respectively connected to the methanol fuel inlet and the methanol fuel outlet. The methanol supply pipeline, from the inlet to the outlet, successively includes a methanol inlet pneumatic valve, a first pressure transmitter, a first nitrogen purge port, a methanol filter, a filter differential pressure transmitter, a first methanol pneumatic stop valve, a second methanol pneumatic relief stop valve, a second pressure transmitter, a third methanol pneumatic stop valve, a second nitrogen purge port, a fresh water inlet, a temperature transmitter, and a second pressure sensor.

[0011] The nitrogen purge pipeline is used to purge the residual methanol liquid in the methanol fuel supply pipeline. The nitrogen purge pipeline includes a pressure transmitter, a pressure gauge, a manual stop valve, a nitrogen filter, a pneumatic valve stop valve, an adjustable orifice plate, and a manual stop check valve.

[0012] The fresh water pipeline is used to provide fresh water for mixing with methanol for combustion, which can reduce the NOX content after methanol combustion. The fresh water pipeline includes a pressure transmitter, a pneumatic stop valve, an adjustable orifice plate, and a manual stop valve.

[0013] The control device can not only be used to monitor and control the valve group unit, but also serve as a signal transfer station for the signal interaction between the engine and the valve group unit, meeting the different requirements of different brands of main engines for the valve group unit. The described control device can be a control cabinet with a control system or a junction box without a control system. The control device can real-time monitor the methanol supply process, nitrogen purge process, and methanol-water mixing process of the described pipeline system, can drive the valve components of the pipeline system, and can be electrically connected to the pressure transmitters and temperature transmitters in the described pipeline system.

[0014] Compared with the prior art, the present invention can quickly cut off the methanol fuel, improving the safety of using methanol fuel on ships, which is convenient for the promotion of methanol fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present invention will become more obvious.

[0016] Figure 1 FIG. is a schematic structural diagram of a marine methanol fuel valve group unit according to the present invention.

[0017] In the figure: 1 represents the pneumatic shut-off valve at the methanol inlet, 2 represents the pressure transmitter, 3 represents the methanol filter, 4 represents the methanol pneumatic shut-off valve, 5 represents the methanol drain shut-off valve, 6 represents the pressure transmitter, 7 represents the methanol pneumatic shut-off valve, 8 represents the nitrogen manual check valve, 9 represents the pressure transmitter, 10 represents the temperature transmitter, 11 represents the nitrogen pneumatic shut-off valve, 12 represents the manual fresh water check valve, 13 represents the pneumatic fresh water shut-off valve, 14 represents the pneumatic fresh water shut-off valve, 15 represents the pressure transmitter, 16 represents the fresh water pneumatic shut-off valve, 17 represents the pressure transmitter, 18 represents the nitrogen manual check valve, 19 represents the nitrogen pneumatic shut-off valve, 20 represents the nitrogen pneumatic shut-off valve, 21 represents the nitrogen pneumatic shut-off valve, 22 represents the nitrogen pneumatic shut-off valve, 23 represents the nitrogen pneumatic shut-off valve, 24 represents the nitrogen filter, 25 represents the manual shut-off valve, 26 represents the pressure gauge, 27 represents the pressure transmitter, 28 represents the nitrogen manual check valve, 29 represents the nitrogen manual check valve, 30 represents the control equipment; Detailed implementation mode

[0018] The embodiments of the present invention will be described in detail below: These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

[0019] An embodiment of the present invention provides a marine methanol fuel valve group unit, which can effectively protect the safety of ships using methanol fuel.

[0020] As Figure 1 shown, the marine methanol fuel valve group unit provided by this embodiment may include: a pipeline system and a control equipment; wherein:

[0021] The pipeline system includes a methanol fuel pipeline, a nitrogen purging pipeline, and a fresh water pipeline. The methanol fuel pipeline includes a path from the methanol inlet to the methanol pneumatic shut-off valve 1, to the pressure transmitter 2, to the methanol filter 3, to the methanol pneumatic shut-off valve 4, to the pressure transmitter 6, to the methanol pneumatic shut-off valve 7, to the temperature transmitter 10, to the pressure transmitter 9, and then to the methanol outlet. Among them, the methanol pneumatic shut-off valve 5 is used for methanol discharge; the nitrogen purging pipeline is divided into two paths. The first path includes a path from the nitrogen inlet, to the pressure transmitter 27, to the pressure gauge 26, to the nitrogen manual shut-off valve 25, to the nitrogen filter 24, to the nitrogen pneumatic shut-off valve 23, to the nitrogen pneumatic shut-off valve 22, to the nitrogen manual check valve 28, and then to the methanol fuel pipeline. Among them, the nitrogen pneumatic shut-off valve 21 and the nitrogen manual check valve 29 are used for nitrogen discharge; the second path of the nitrogen purging pipeline includes a path from the nitrogen inlet, to the pressure transmitter 27, to the pressure gauge 26, to the nitrogen manual shut-off valve 25, to the nitrogen filter 24, to the nitrogen pneumatic shut-off valve 20, to the nitrogen pneumatic shut-off valve 11, to the nitrogen manual check valve 8, and then to the methanol fuel pipeline. Among them, the nitrogen pneumatic check valve 19 and the nitrogen manual check valve 18 are used for nitrogen discharge; the fresh water pipeline includes a path from the fresh water inlet, to the fresh water pressure sensor 15, to the fresh water pneumatic check valve 16, to the pressure sensor 17, to the fresh water pneumatic shut-off valve 13, to the fresh water manual check valve 12, and then to the methanol fuel pipeline;

[0022] The control device 30 is used to control all the pneumatic valves in the pipeline system, receive the signals of all the transmitters, and monitor the state of the pipeline system, so as to realize the leakage detection, inerting scavenging, manual and automatic cut-off of the methanol fuel supply, filtration of the methanol fuel entering the engine, and methanol water blending function of the pipeline system.

[0023] All matters not covered in the above embodiments of the present invention are well-known technologies in the art.

[0024] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A valve group unit for a marine methanol fuel engine, comprising a fixed bracket, characterized in that, a pipeline system and control equipment are installed on the fixed bracket; The pipeline system includes a methanol supply pipeline, a nitrogen purge pipeline, and a fresh water pipeline. Among them, the methanol supply pipeline is used to supply fuel to a methanol fuel engine, the nitrogen purge pipeline is used to purge the residual methanol liquid in the methanol fuel supply pipeline, and the fresh water pipeline is used to supply fresh water for mixing with methanol for combustion to reduce the NO X content; the control equipment is used to monitor and control the valve group unit, and at the same time serves as a signal transfer station for signal interaction between the engine and the valve group unit.

2. The valve group unit for a marine methanol fuel engine according to claim 1, characterized in that: the methanol supply pipeline sequentially includes a methanol inlet pneumatic valve, a first pressure transmitter, a first nitrogen purge port, a methanol filter, a filter differential pressure transmitter, a first methanol pneumatic shut-off valve, a second methanol pneumatic relief shut-off valve, a second pressure transmitter, a third methanol pneumatic shut-off valve, a second nitrogen purge port, a fresh water inlet, a temperature transmitter, and a second pressure sensor from the inlet to the outlet; the nitrogen purge pipeline includes a pressure transmitter, a pressure gauge, a manual shut-off valve, a nitrogen filter, a pneumatic valve shut-off valve, an adjustable orifice plate, and a manual check valve. the fresh water pipeline includes a pressure transmitter, a pneumatic shut-off valve, an adjustable orifice plate, and a manual shut-off valve.

3. The valve group unit for a marine methanol fuel engine according to claim 1, characterized in that, the control equipment is a control cabinet with a control system or a junction box without a control system.

4. The valve group unit for a marine methanol fuel engine according to claim 1, characterized in that, the control equipment can monitor in real time the methanol supply process, nitrogen purge process, and methanol-water mixing process of the pipeline system, can drive the valve components of the pipeline system, and can be electrically connected to the pressure transmitters and temperature transmitters in the pipeline system.

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