Pressure stabilizing tank structure of marine methanol supply pipeline

Abstract

The utility model discloses a surge tank structure of a marine methanol supply pipeline, which comprises a methanol supply pipeline and a nitrogen inerting system, the methanol supply pipeline is provided with a surge tank, and the top of the surge tank is provided with a gas inlet connected with the nitrogen inerting system through an electronic ball valve. A pressure sensor in signal connection with the electronic ball valve is installed on a pipeline between the electronic ball valve and the gas inlet, a dynamic pressure adjusting mechanism is constructed, when the pressure drops to a preset value, nitrogen is supplemented into the surge tank in time through a nitrogen inerting system, and unsmooth methanol fuel supply caused by sudden pressure drop is avoided; a safety valve used for exhausting is further installed at the top of the surge tank, when the pressure in the surge tank is too high, the safety valve is automatically opened to exhaust redundant gas, the situation that a methanol supply pipeline is impacted due to the too high pressure is avoided, the methanol leakage risk is reduced, meanwhile, the service life of the pipeline and related equipment is prolonged, and the operation and maintenance cost of the ship is reduced.

Description

Technical Field

[0001] This utility model relates to a marine methanol supply pipeline, and in particular to a pressure stabilizing tank structure. Background Technology

[0002] In traditional designs, pressure stabilizing tanks are often only considered for connection to the methanol supply pipeline to balance the methanol pressure within the pipeline. Their air intake control logic is also designed solely around methanol pressure changes, without reserving channels and control interfaces for connection with the nitrogen inert purging system. Meanwhile, the nitrogen inert purging system's air supply pipeline is focused on purging the pipeline as a whole during specific stages (such as ship fuel loading and unloading, equipment maintenance, etc.). The layout and control strategy of its air intake port do not match the operational requirements of the pressure stabilizing tank, making it difficult for the two to be directly connected in terms of structure and function. This means that the pressure stabilizing tank can only achieve limited regulation of pipeline pressure by relying on its own structure. When faced with rapid and large pressure fluctuations under complex ship operating conditions, its regulation capability is clearly insufficient and cannot fully meet the actual needs of safe and efficient ship operation. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a pressure stabilizing tank structure for a marine methanol supply pipeline.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A pressure stabilizing tank structure for a marine methanol supply pipeline includes a methanol supply pipeline for supplying methanol from a methanol tank to an engine, and a nitrogen inerting system for purging the methanol supply pipeline. The methanol supply pipeline is equipped with a pressure stabilizing tank for stabilizing pressure. An air inlet is provided at the top of the pressure stabilizing tank. The air supply pipeline of the nitrogen inerting system is connected to the air inlet pipeline via an electronic ball valve. A pressure sensor with a signal connection to the electronic ball valve is installed in the pipeline between the electronic ball valve and the air inlet. A safety valve for venting is also installed at the top of the pressure stabilizing tank. The safety valve is a breather valve.

[0006] The nitrogen pressure of the nitrogen inerting system is 0.6-0.8 MPa; the exhalation pressure of the safety valve is 0.6 MPa.

[0007] The beneficial effects of this utility model are:

[0008] 1. An air inlet is provided on the top of the pressure stabilizing tank. The gas supply pipeline of the nitrogen inerting system is connected to the air inlet pipeline through an electronic ball valve. A pressure sensor with a signal connection to the electronic ball valve is installed in the pipeline between the electronic ball valve and the air inlet, thus constructing a dynamic pressure regulation mechanism. When the pressure of the methanol supply pipeline drops to the preset value, the pressure sensor can quickly sense it and control the electronic ball valve to open, so that nitrogen can be replenished into the pressure stabilizing tank in time. This effectively avoids the methanol fuel supply disruption caused by a sudden drop in pressure, ensures the stable operation of the ship's power system, and improves the adaptability of the methanol supply system to the complex navigation environment of the ship.

[0009] 2. The safety valve installed on the top of the pressure stabilizing tank forms a linkage protection mechanism with the electronic ball valve and pressure sensor. When the pressure inside the pressure stabilizing tank is too high, the safety valve will automatically open to discharge excess gas, preventing the methanol supply pipeline from being impacted by excessive pressure, preventing problems such as loosening of pipeline connections and failure of seals, reducing the risk of methanol leakage, and extending the service life of pipelines and related equipment, thereby reducing ship operation and maintenance costs. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the pipeline of this utility model;

[0012] Figure 2 This is a schematic diagram of the methanol supply pipeline. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0014] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0015] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0016] Reference Figure 1-2A pressure stabilizing tank structure for a marine methanol supply pipeline includes a methanol supply pipeline that supplies methanol from the methanol tank to the engine, and a nitrogen inerting system 5 for overall purging of the methanol supply pipeline. The methanol supply pipeline is equipped with a pressure stabilizing tank 1 for stabilizing pressure. An air inlet is located at the top of the pressure stabilizing tank 1. The air supply pipeline of the nitrogen inerting system is connected to the air inlet pipeline via an electronic ball valve 2. A pressure sensor 3, which forms a signal connection with the electronic ball valve 2, is installed in the pipeline between the electronic ball valve 2 and the air inlet, thus establishing a dynamic pressure regulation mechanism. When the pressure in the methanol supply pipeline drops to a preset value, the pressure sensor can quickly sense and control the electronic ball valve 3. The ball valve opens, allowing nitrogen to be replenished into the pressure stabilizing tank in a timely manner. This effectively prevents methanol fuel supply disruptions caused by sudden pressure drops, ensuring stable operation of the ship's power system and improving the adaptability of the methanol supply system to complex navigation environments. The top of the pressure stabilizing tank 1 is also equipped with a safety valve 4 for venting. The safety valve 4 is a breather valve, which forms a linkage protection mechanism with the electronic ball valve and pressure sensor. When the pressure inside the pressure stabilizing tank is too high, the safety valve automatically opens to release excess gas, preventing excessive pressure from impacting the methanol supply pipeline, preventing problems such as loosening of pipeline connections and sealing failure, reducing the risk of methanol leakage, extending the service life of pipelines and related equipment, and reducing ship operation and maintenance costs.

[0017] Due to the low ambient temperature, methanol needs to be heated (methanol has a temperature range of 20℃-40℃ and a pressure range of 0.5±0.05MPa, which has the advantages of high combustion efficiency, stable power output, and improved system safety). The volatility of methanol increases, which leads to an increase in the internal pressure of the methanol supply pipeline. When the internal pressure of the pressure stabilizing tank 1 is greater than 0.6MPa, the internal gas is discharged through the breather valve to release the pressure and prevent the pressure stabilizing tank 1 from rupturing due to excessive pressure.

[0018] In addition, factors such as hull rolling caused by wind and waves, fluctuations in fuel demand due to changes in navigation conditions, and significant changes in ocean temperature can all significantly affect the pressure in the methanol supply pipeline. Unstable pressure can not only cause poor methanol fuel supply and affect the output performance of the ship's power system, but may also cause problems such as loosening of pipeline connections and failure of seals, increasing the risk of methanol leakage. At the same time, methanol is a flammable and explosive substance. The methanol supply system is located in the relatively closed space of the ship. Once air is mixed into the pipeline to form a flammable mixture, it can easily cause catastrophic accidents such as explosions in the complex vibration and electrical environment of the ship, seriously threatening the life and property safety of the ship and its crew.

[0019] The nitrogen pressure of the nitrogen inerting system is 0.6-0.8 MPa, which is higher than the pressure requirement of the pressure stabilizing tank 1, thus ensuring the replenishment of nitrogen to the pressure stabilizing tank 1.

[0020] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pressure stabilizing tank structure for a marine methanol supply pipeline, comprising a methanol supply pipeline for supplying methanol from the methanol tank to the engine and a nitrogen inerting system (5) for purging the methanol supply pipeline as a whole, characterized in that... The methanol supply pipeline is equipped with a pressure stabilizing tank (1) for stabilizing pressure. The pressure stabilizing tank (1) has an air inlet at the top. The gas supply pipeline of the nitrogen inerting system (5) is connected to the air inlet pipeline through an electronic ball valve (2). The pipeline between the electronic ball valve (2) and the air inlet is equipped with a pressure sensor (3) that forms a signal connection with the electronic ball valve (2). The pressure stabilizing tank (1) is also equipped with a safety valve (4) for venting.

2. The pressure stabilizing tank structure for a marine methanol supply pipeline according to claim 1, characterized in that... The nitrogen pressure of the nitrogen inerting system (5) is 0.6-0.8 MPa.

3. The pressure stabilizing tank structure for a marine methanol supply pipeline according to claim 1, characterized in that... The safety valve (4) is a breather valve.

4. The pressure stabilizing tank structure for a marine methanol supply pipeline according to claim 1 or 3, characterized in that... The exhalation pressure of the safety valve (4) is 0.6 MPa.

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