CN218559087U

CN218559087U - Condensing system for methanol fuel storage cabin

Info

Publication number: CN218559087U
Application number: CN202222267052.8U
Authority: CN
Inventors: 秦明达; 喻林; 彭贵胜; 李达; 余卓蓉; 任怀远; 关英华; 迟磊; 耿思奇
Original assignee: Dalian Shipbuilding Industry Co Ltd
Current assignee: Dalian Shipbuilding Industry Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-03-03
Anticipated expiration: 2032-08-29

Abstract

A condensing system for a methanol fuel storage cabin is characterized in that a cooling coil is arranged in the methanol storage cabin, and the cooling coil is sequentially connected with an evaporator, an expansion water tank and a temperature control valve and then flows back to the methanol storage cabin to form a first circulation network; the evaporator is connected with the compressor and the condenser in sequence through pipelines and then reflows to the evaporator to form a second circulation network. The methanol storage cabin is internally provided with a cooling coil, the cooling coil is immersed in methanol liquid or positioned above the methanol liquid, the liquid outlet of the cooling coil is connected with the evaporator through a pipeline, and the return pipeline of the expansion water tank is connected with the liquid inlet of the cooling coil. The invention can effectively reduce the evaporation gas generated in the methanol fuel storage cabin, thereby reducing the operation cost of the ship, reducing the risk of contacting toxic gas for workers, improving the safety coefficient of the ship operation, reusing the steam generated by the methanol fuel, increasing the cargo capacity without adding an isolation cabin or heat insulation treatment aiming at the external environment, reducing the weight of the ship body and reducing the operation and construction cost.

Description

Condensing system for methanol fuel storage cabin

Technical Field

The invention relates to a ship using methanol as fuel, in particular to a system for condensing methanol in a methanol storage tank in the ship.

Background

Green methanol is taken as a carbon neutralization fuel, and is currently paid much attention and attention by the shipping industry in order to obtain more carbon emission reduction effects. Due to the low flash point of methanol, its fuel storage tanks can only be arranged in the area of the cargo tanks in connection with other cargo tanks and away from the safe areas. Because the methanol liquid is liquid at normal temperature, is easy to evaporate, has low boiling point (64.7 ℃), is toxic and the like, when the methanol liquid is used as fuel, the storage temperature is usually lower than 30 ℃, the temperature in a methanol fuel storage cabin is not suitable to exceed 37 ℃, but for a methanol fuel cargo ship of which the cargo hold needs to be heated, the SLOP cabin is usually heated at 66 ℃, for a finished oil tanker, the temperature of the loaded cargo oil is usually over 80 ℃ when the cargo oil is filled, for a ship provided with a cargo hold heater, the heating temperature is usually over 60 ℃, and for a ship running in a hot-zone area for a long time, the temperature in the cabin is usually over 40-50 ℃ due to high external temperature, sunlight irradiation and the like. Therefore, no matter the methanol fuel storage cabin is arranged above the deck or in the cargo area of the liquid cargo ship by using the C-shaped tank, the evaporation of the methanol fuel can be accelerated by the increased temperature, and in order to avoid fuel waste caused by excessive evaporation gas and consider the toxicity and the danger caused by flammability and explosiveness of the methanol evaporation gas, the methanol cabin and other adjacent high-temperature cabins or the deck surface are usually required to be isolated or insulated, so that the cargo space of the ship is inevitably lost, the structural weight is increased, the cargo carrying capacity is reduced, the safety protection measures are increased, and the operation cost is increased.

Disclosure of Invention

In order to solve the problems, the invention provides a condensing system for a methanol fuel storage cabin, which aims to achieve the purpose of avoiding fuel waste caused by methanol evaporation gas while not losing the cargo space of a ship, and adopts the technical scheme that:

a condensing system for a methanol fuel storage cabin is characterized in that a cooling coil is arranged in the methanol storage cabin, and is sequentially connected with an evaporator, an expansion water tank and a temperature control valve and then reflows to the methanol storage cabin to form a first circulation network; the evaporator is connected with the compressor and the condenser in sequence through pipelines and then flows back to the evaporator to form a second circulation network.

The methanol storage cabin is internally stored with methanol liquid, the methanol storage cabin is internally provided with a cooling coil, the cooling coil is immersed in the methanol liquid or is positioned above the methanol liquid, the liquid outlet of the cooling coil is connected with the evaporator through a pipeline, and the return pipeline of the expansion water tank is connected with the liquid inlet of the cooling coil.

According to the condensing system for the methanol fuel storage cabin, furthermore, the top of the methanol storage cabin is provided with an upward convex cavity, and the cooling coil is located in the cavity.

In the above condensation system for the methanol fuel storage tank, further, a cooling liquid is circulated in the cooling coil, and the cooling liquid is seawater, fresh water or water glycol.

In the above condensation system for the methanol fuel storage tank, further, the branch pipe of the temperature control valve is connected into the pipeline from the liquid outlet of the cooling coil to the evaporator.

The condensing system for the methanol fuel storage cabin is further provided with a condensate inlet and a condensate outlet, wherein condensate enters through the condensate inlet and flows out through the condensate outlet.

In the above condensation system for the methanol fuel storage tank, a temperature control valve is further arranged on a pipeline of the expansion water tank leading to the methanol storage tank.

The invention utilizes the physical characteristic that methanol liquid is liquid at low temperature but is easy to evaporate at normal temperature or in a heating state, reduces the temperature of methanol in the storage cabin through the condensing device, reduces the evaporated gas generated in the cabin, condenses and liquefies the methanol vapor through the cooling coil pipe on the top of the cabin, and recovers the liquefied methanol fuel into the storage cabin or the daily cabin.

The invention can effectively reduce the evaporation gas generated in the methanol fuel storage cabin and reduce the waste generated by evaporation, thereby reducing the operation cost of the ship. Because the steam that the methanol fuel produced no longer outwards diffuses, reduce the risk that the staff contacted toxic gas, reduce inflammable and explosive risk, improve the factor of safety of boats and ships operation. The steam generated by the methanol fuel can be reused without adding an isolation cabin or heat insulation treatment aiming at the external environment, so that the cargo capacity is increased, the weight of the ship body is reduced, and the operation and construction cost is reduced.

Drawings

FIG. 1 is a schematic of the system of the present invention;

FIG. 2 is a schematic diagram of the intrusion of a cooling coil into the methanol liquid;

FIG. 3 is a schematic structural diagram of a methanol storage tank with a cavity at the top and a cooling coil in the cavity;

wherein: 1-a methanol storage cabin, 2-an evaporator, 3-an expansion water tank, 4-a compressor, 5-a condenser, 6-a cooling coil, 7-a cavity and 8-a temperature control valve.

Detailed Description

The invention is further explained with reference to the drawings.

Example 1

A condensing system for a methanol fuel storage cabin is shown in figures 1 and 2, wherein a cooling coil is arranged in the methanol storage cabin and sequentially connected with an evaporator, an expansion water tank and a temperature control valve and then reflows to the methanol storage cabin to form a first circulation network. The evaporator is connected with the compressor and the condenser in sequence through pipelines and then reflows to the evaporator to form a second circulation network.

The methanol storage cabin is internally stored with methanol liquid, and is provided with cooling coil in the methanol storage cabin, and in cooling coil invaded the methanol liquid, the cooling coil liquid outlet passed through the pipeline and is connected with the evaporimeter, and expansion tank return line is connected with the cooling coil inlet. The cooling coil is arranged in the methanol liquid, so that the methanol liquid can be ensured to be always in a low-temperature state, namely a liquid state.

Example 2

According to the condensing system for the methanol fuel storage tank in embodiment 1, a cavity is arranged at the top of the methanol storage tank, as shown in fig. 3, a cooling coil is placed in the cavity, methanol vapor generated by methanol liquid upwards contacts the cooling coil, and under the action of the cooling coil, the methanol gas is changed into liquid when meeting cold and returns to the lower part, and is stored in the methanol storage tank, so that fuel is continuously provided for a ship, and waste of the fuel is avoided.

Example 3

The condensing system for the methanol fuel storage tank according to embodiment 1, wherein the cooling coil is located at the top of the methanol storage tank, does not intrude into the methanol liquid, and can also have the function and effect of cooling the methanol gas to liquefy the methanol gas and return the liquefied methanol gas to the lower part.

The invention can effectively reduce the evaporation gas generated in the methanol fuel storage cabin and reduce the waste generated by evaporation, thereby reducing the operation cost of the ship. Because the steam that the methanol fuel produced no longer outwards diffuses, reduce the risk that the staff contacted toxic gas, reduce inflammable and explosive risk, provide the factor of safety of ship operation. The steam generated by the methanol fuel can be reused without adding an isolation cabin or heat insulation treatment aiming at the external environment, so that the cargo capacity is increased, the weight of the ship body is reduced, and the operation and construction cost is reduced.

Claims

1. A condensing system for a methanol fuel storage tank, characterized by: a cooling coil is arranged in the methanol storage cabin, and the cooling coil is connected with the evaporator, the expansion water tank and the temperature control valve in sequence and then flows back to the methanol storage cabin to form a first circulation network; the evaporator is connected with the compressor and the condenser in sequence through pipelines and then flows back to the evaporator to form a second circulation network;

2. A condensing system for a methanol fuel storage compartment as in claim 1, wherein: the top of the methanol storage cabin is provided with a cavity protruding upwards, and the cooling coil is positioned in the cavity.

3. A condensing system for a methanol fuel storage tank according to claim 1 or 2, characterized in that: cooling liquid is circulated in the cooling coil, and the cooling liquid is seawater, fresh water or water glycol.

4. A condensing system for a methanol fuel storage tank as in claim 1 wherein: the branch pipe of the temperature control valve is connected into the pipeline of the liquid outlet of the cooling coil pipe leading to the evaporator.

5. A condensing system for a methanol fuel storage tank as in claim 1 wherein: the condenser is provided with a condensate inlet and a condensate outlet, and condensate enters through the condensate inlet and flows out through the condensate outlet.

6. A condensing system for a methanol fuel storage tank as in claim 1 wherein: a single control valve is arranged on a pipeline of the expansion water tank leading to the methanol storage cabin.