A marine methanol residue recovery device

Abstract

The application discloses a marine methanol residual liquid recovery device and relates to the technical field of methanol fuel recovery, in particular to the marine methanol residual liquid recovery device. The device specifically comprises a separation recovery tank, a methanol heat exchanger, a precipitation tank and a liquid regulating valve. A methanol residual liquid inlet pipe is fixed to one side of the top end of the separation recovery tank. The separation recovery tank is connected with the hot fluid channel inlet end of the methanol heat exchanger through a methanol vapor conveying pipe. The hot fluid channel discharge end of the methanol heat exchanger is connected with the top end of the inner cavity of the precipitation tank through a methanol liquid discharge pipe. A methanol conveying pipe is fixed to one side of the bottom end of the inner cavity of the precipitation tank. The other end of the methanol conveying pipe is connected with a methanol supply system, and a liquid regulating valve is arranged on the methanol conveying pipe. The marine methanol residual liquid recovery device can increase the recovery rate of methanol residual liquid to more than 90% by using low-temperature gaseous technology, and effectively avoids the waste problem generated in the use of methanol fuel.

Description

Technical Field

[0001] This invention relates to the field of methanol fuel recovery technology, specifically to a marine methanol residue recovery device. Background Technology

[0002] Methanol is a renewable resource, and its high energy density and low pollution levels after combustion have led to its widespread application in certain fields. Today, methanol fuel, as a new type of clean energy, is seeing its usage expand. Methanol fuel plays a crucial role in the transition from traditional fuels to clean energy.

[0003] A methanol fuel supply system typically includes components such as a methanol fuel storage tank, a methanol supply unit, and a fuel valve assembly. The working principle of the methanol fuel supply system is to pressurize and heat liquid methanol fuel within the methanol supply unit before delivering it to the engine combustion chamber for combustion and power generation. However, during the use of methanol fuel, due to various reasons such as low or insufficient fuel levels or different emission patterns, a large amount of residual methanol can remain in the fuel system, affecting its efficiency and causing environmental pollution.

[0004] Existing technologies include methods for recycling and reuse (such as reheating, recompression, and re-evaporation) as well as traditional waste storage and treatment methods. These methods have the advantages of being technologically mature and stable, but they also have disadvantages such as high energy consumption and the generation of pollutants during the treatment process. Therefore, there is a need to provide a permanent and efficient methanol residue recovery device solution that addresses these shortcomings. Summary of the Invention

[0005] This invention provides a marine methanol residue recovery device, which solves the problems of high energy consumption and pollutant generation in the existing methanol residue recovery methods mentioned in the background art.

[0006] The present invention provides the following technical solution: a marine methanol residue recovery device, which adopts low temperature gasification technology to purify the collected methanol residue by first evaporating and then liquefying it. No harmful substances are generated in the methanol residue recovery process, and the device can utilize the existing resources on the ship without causing any interference to the ship's original methanol fuel supply system.

[0007] A marine methanol residue recovery device includes a separation and recovery tank, a methanol heat exchanger, a sedimentation tank, and a liquid regulating valve. A methanol residue inlet pipe is fixed to one side of the top of the separation and recovery tank, and the bottom end of the methanol residue inlet pipe is located below the lowest liquid level in the separation and recovery tank. The inlet end of the hot fluid channel of the separation and recovery tank is connected to the methanol heat exchanger via a methanol vapor delivery pipe. The outlet end of the hot fluid channel of the methanol heat exchanger is connected to the top of the inner cavity of the sedimentation tank via a methanol liquid outlet pipe. A methanol delivery pipe is fixed to one side of the bottom of the inner cavity of the sedimentation tank, and the other end of the methanol delivery pipe is connected to a methanol supply system. A liquid regulating valve is provided on the methanol delivery pipe.

[0008] Preferably, the sedimentation tank is equipped with a pressure gauge and a level gauge.

[0009] Preferably, the separation and recovery tank is equipped with a heating structure, and the heating temperature of the heating structure is 75-85℃; the top of the separation and recovery tank is equipped with a safety valve, and the outside of the separation and recovery tank is wrapped with an insulation sleeve.

[0010] Preferably, the flow direction of the medium fluid in the hot fluid channel of the methanol heat exchanger is opposite to the flow direction of the medium fluid in the cold fluid channel of the methanol heat exchanger, and the inlet end of the hot fluid channel of the methanol heat exchanger is located above the outlet end of the hot fluid channel of the methanol heat exchanger. The medium fluid in the cold fluid channel of the methanol heat exchanger is low-temperature water or seawater. The inlet end of the cold fluid channel of the methanol heat exchanger is connected to the coolant inlet pipe, and the outlet end of the cold fluid channel of the methanol heat exchanger is connected to the coolant outlet pipe.

[0011] Preferably, one end of the methanol vapor conveying pipe is fixedly connected to the top of the inner cavity of the separation and recovery tank, and the other end of the methanol vapor conveying pipe is fixedly connected to the inlet end of the hot fluid channel of the methanol heat exchanger.

[0012] Preferably, a flow regulating valve is provided at one end of the methanol residual liquid inlet pipe, one end of the methanol vapor conveying pipe, one end of the coolant inlet pipe, one end of the coolant outlet pipe, and one end of the methanol liquid outlet pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The shipboard methanol residue recovery device utilizes low-temperature gasification technology, which can increase the methanol residue recovery rate to over 90%, effectively avoiding the waste problem generated during the use of methanol fuel.

[0015] 2. The shipboard methanol residue recovery device operates at normal temperature and pressure. No energy input is required during the methanol residue recovery process. It only needs to provide residual heat to the residue through a heat exchanger to achieve the purpose of evaporation. No harmful substances are generated during the methanol residue recovery process. Furthermore, the heat loss of the separation and recovery tank can be reduced by the heat insulation jacket, thus saving energy.

[0016] 3. The shipboard methanol residue recovery device has a simple, centralized, and compact structure, is easy to operate and maintain, and is stable and reliable in operation. It can utilize the existing resources on the ship and will not cause any interference to the ship's original methanol fuel supply system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural workflow of the present invention;

[0018] Figure 2 This is a schematic diagram of a methanol heat exchanger in an embodiment of the present invention.

[0019] In the diagram: 1. Separation and recovery tank; 2. Methanol heat exchanger; 3. Sedimentation tank; 4. Liquid regulating valve; 5. Methanol residual liquid inlet pipe; 6. Methanol vapor delivery pipe; 7. Coolant inlet pipe; 8. Coolant outlet pipe; 9. Methanol liquid outlet pipe; 10. Methanol delivery pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a marine methanol residue recovery device, including a separation and recovery tank 1. The outer surface of the separation and recovery tank 1 is covered with an insulation sleeve, which can reduce heat loss during the use of the separation and recovery tank 1. In some embodiments of this application, the insulation sleeve is made of PEVA material. A methanol residue inlet is provided on one side of the top of the separation and recovery tank 1. A methanol residue inlet pipe 5 is fixed in the inner cavity of the methanol residue inlet, and the bottom end of the methanol residue inlet pipe 5 is located below the lowest liquid level of the separation and recovery tank 1. Through the setting of the methanol residue inlet pipe 5, the collected methanol residue can enter the inner cavity of the separation and recovery tank 1.

[0022] The separation and recovery tank 1 is equipped with a heating structure. The heat generated by this structure evaporates the methanol residue within the tank. During operation, the controller maintains a heating temperature between 75-85°C, effectively turning the methanol liquid into a gas. In some embodiments of this invention, the heating structure is an electric heating element or a coil is installed inside the tank. High-temperature water flows within the coil, exchanging heat with the methanol residue and thus turning it into a gas. When this methanol residue recovery device is applied to a ship's methanol fuel supply system, it can utilize existing ship resources. A heat exchanger allows seawater to exchange heat with the exhaust gases generated during ship operation. The exhaust gases heat the seawater, which then exchanges heat with the methanol residue. This eliminates the need for any energy input during methanol residue recovery, ensuring that the device does not generate any waste gas, wastewater, or waste residue during operation.

[0023] The top of the separation and recovery tank 1 is equipped with a safety valve and a methanol vapor outlet. A methanol vapor delivery pipe 6 is fixed to the top of the methanol vapor outlet. The other end of the methanol vapor delivery pipe 6 is fixedly connected to the inlet end of the hot fluid channel of the methanol heat exchanger 2. Through the methanol vapor delivery pipe 6, the methanol vapor in the separation and recovery tank 1 enters the hot fluid channel of the methanol heat exchanger 2.

[0024] The flow direction of the medium fluid in the hot fluid channel of methanol heat exchanger 2 is opposite to that in the cold fluid channel of methanol heat exchanger 2. The medium fluid in the cold fluid channel of methanol heat exchanger 2 is low-temperature water or seawater. The inlet end of the cold fluid channel of methanol heat exchanger 2 is connected to the coolant inlet pipe 7, and the outlet end of the cold fluid channel of methanol heat exchanger 2 is connected to the coolant outlet pipe 8. When methanol heat exchanger 2 is in use, during the flow of methanol vapor in the hot fluid channel of methanol heat exchanger 2, the low-temperature water or seawater can exchange heat with the methanol vapor, the methanol vapor liquefies, and the liquefied methanol liquid is discharged from the outlet end of the hot fluid channel of methanol heat exchanger 2.

[0025] In some embodiments of this application, the methanol heat exchanger 2 is a cyclone condenser. The cold fluid channel of the methanol heat exchanger 2 is located inside the side wall of the cyclone condenser and is spiral-shaped. The cold fluid rotates within the cold fluid channel. The inlet of the cold fluid channel is located at the bottom of the inner cavity of the side wall of the cyclone condenser, and the outlet of the cold fluid channel is located at the top of the inner cavity of the cyclone condenser. The hot fluid channel of the methanol heat exchanger 2 is located inside the inner cavity of the cyclone condenser. The inlet of the hot fluid channel is located at the top of the inner cavity of the cyclone condenser, and the outlet of the hot fluid channel is located at the bottom of the cyclone condenser. When methanol vapor enters the inner cavity of the cyclone condenser along the tangential inlet, the methanol vapor rotates from top to bottom along the inner wall of the cyclone condenser, exchanging heat with the coolant during its movement. By setting up the cyclone condenser, the movement path of methanol vapor within the methanol heat exchanger 2 can be increased, facilitating the liquefaction of methanol vapor.

[0026] A methanol liquid discharge pipe 9 is fixed to the outlet end of the hot fluid channel of the methanol heat exchanger 2. The other end of the methanol liquid discharge pipe 9 is fixedly connected to the top of the inner cavity of the settling tank 3. The liquefied methanol vapor enters the settling tank 3 through the methanol liquid discharge pipe 9. The settling tank 3 is equipped with a pressure gauge and a level gauge.

[0027] A methanol delivery pipe 10 is fixed to one side of the bottom of the inner cavity of the sedimentation tank 3. The other end of the methanol delivery pipe 10 is connected to the methanol supply system. A liquid regulating valve 4 is provided on the methanol delivery pipe 10. The liquid level of the sedimentation tank is automatically interlocked with the liquid regulating valve 4. The liquid regulating valve 4 controls the flow rate and pressure of methanol to ensure that it enters the methanol fuel supply system smoothly.

[0028] As can be seen from the above description, the entire operation of the methanol residue recovery device in this invention is carried out at normal temperature and pressure, without causing any harmful substances to be emitted.

[0029] When in use, this methanol residue recovery device can utilize existing resources on board the ship to recover methanol residue from the ship's methanol supply system, and the recovered methanol residue can be reintroduced into the methanol fuel supply system.

[0030] Flow regulating valves are installed at one end of the methanol residue inlet pipe 5, one end of the methanol vapor delivery pipe 6, one end of the coolant inlet pipe 7, one end of the coolant outlet pipe 8, and one end of the methanol liquid outlet pipe 9. The working efficiency of the methanol residue recovery device can be controlled by setting the flow regulating valves.

[0031] In summary: When the shipboard methanol residue recovery device is in use, the collected methanol residue enters the separation and recovery tank 1 through the methanol residue inlet pipe 5. The heating structure in the separation and recovery tank 1 heats the methanol residue, causing it to vaporize. The methanol vapor enters the methanol heat exchanger 2 through the methanol vapor delivery pipe 6. The methanol vapor exchanges heat with low-temperature water or seawater in the methanol heat exchanger 2, and the methanol vapor liquefies. The liquefied methanol enters the methanol sedimentation tank 3 through the methanol liquid discharge pipe 9. The methanol liquid in the sedimentation tank 3 can be reintroduced into the methanol fuel supply system through the methanol delivery pipe 10.

[0032] The methanol residue recovery device of this invention can efficiently, environmentally friendly, and energy-savingly utilize methanol residue, converting it into methanol vapor for reuse. It boasts advantages such as high recovery rate, simple operation, and stable reliability. The application of this device not only improves the efficiency of methanol fuel use and the working environment but also completely solves the resource waste and environmental pollution problems caused by methanol residue emissions, providing greater technical support for the promotion and application of methanol fuel.

[0033] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine methanol residue recovery device, comprising a separation and recovery tank (1), a methanol heat exchanger (2), a sedimentation tank (3), and a liquid regulating valve (4), characterized in that: A methanol residue inlet pipe (5) is fixed to one side of the top of the separation and recovery tank (1), and the bottom end of the methanol residue inlet pipe (5) is located below the lowest liquid level of the separation and recovery tank (1). The separation and recovery tank (1) is connected to the inlet end of the hot fluid channel of the methanol heat exchanger (2) through a methanol vapor delivery pipe (6). The outlet end of the hot fluid channel of the methanol heat exchanger (2) is connected to the top of the inner cavity of the sedimentation tank (3) through a methanol liquid outlet pipe (9). A methanol delivery pipe (10) is fixed to one side of the bottom end of the inner cavity of the sedimentation tank (3). The other end of the methanol delivery pipe (10) is connected to the methanol supply system. A liquid regulating valve (4) is provided on the methanol delivery pipe (10). The liquid level of the sedimentation tank (3) is automatically interlocked with the liquid regulating valve (4). The liquid regulating valve (4) is used to control the flow rate and pressure of methanol. The sedimentation tank (3) is equipped with a pressure gauge and a level gauge; The separation and recovery tank (1) is equipped with a heating structure, and the heating temperature of the heating structure is 75°C. 85℃; the top of the separation and recovery tank (1) is equipped with a safety valve, and the outside of the separation and recovery tank (1) is wrapped with an insulation sleeve; The flow direction of the medium fluid in the hot fluid channel of the methanol heat exchanger (2) is opposite to the flow direction of the medium fluid in the cold fluid channel of the methanol heat exchanger (2), and the inlet end of the hot fluid channel of the methanol heat exchanger (2) is located above the outlet end of the hot fluid channel of the methanol heat exchanger (2). The medium fluid in the cold fluid channel of the methanol heat exchanger (2) is seawater. The inlet end of the cold fluid channel of the methanol heat exchanger (2) is connected to the coolant inlet pipe (7), and the outlet end of the cold fluid channel of the methanol heat exchanger (2) is connected to the coolant outlet pipe (8). One end of the methanol vapor conveying pipe (6) is fixedly connected to the top of the inner cavity of the separation and recovery tank (1), and the other end of the methanol vapor conveying pipe (6) is fixedly connected to the inlet end of the hot fluid channel of the methanol heat exchanger (2).

2. The marine methanol residue recovery device according to claim 1, characterized in that: A flow regulating valve is provided at one end of the methanol residual liquid inlet pipe (5), one end of the methanol vapor conveying pipe (6), one end of the coolant inlet pipe (7), one end of the coolant outlet pipe (8), and one end of the methanol liquid outlet pipe (9).

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