A diesel-LNG dual-fuel inland fruit and vegetable cargo ship

Abstract

The present invention discloses a diesel-LNG dual-fuel inland fruit and vegetable cargo ship, which relates to the field of ship technology, including a hull, a diesel propeller, a gas propeller and a liquid storage tank, the hull is provided with a cargo hold, the outlet end of the liquid storage tank is connected with a vaporizer, the vaporizer is fixed on the hull, the vaporizer includes a shell and an LNG gas transmission bypass pipe arranged in the shell, a water bath room is provided in the shell, the upper end of the water bath room is provided with a water inlet, the lower end of the water bath room is provided with a water outlet, the two ends of the LNG gas transmission bypass pipe are respectively connected to the liquid storage tank and the gas propeller, the water outlet is connected with a fresh-keeping device, the fresh-keeping device is arranged in the cargo hold, the fresh-keeping device includes a humidifier and a plurality of radiators, the radiator is arranged on the side wall of the cargo hold, and the humidifier is connected to the radiator through a water pipe. When the low-temperature water passing through the vaporizer flows through the radiator, the cargo hold is cooled by the heat dissipation effect of the radiator, and the fresh vegetables and fruits in the cargo hold are preserved.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a diesel-LNG dual-fuel inland river vegetable and fruit freight ship. Background Art

[0002] With the development of the global economy, the global shortage of oil resources and the increasingly serious environmental pollution problems have led to a sharp increase in the consumption of natural gas with good combustion and low pollution. Natural gas is a gas at room temperature, which is not convenient for storage and long-distance transportation. Therefore, it is generally converted into -163℃ low-temperature liquid LNG (Liquefied Natural Gas), and then stored and transported over long distances. However, before using LNG, a vaporization device is required to increase the temperature of LNG at about -163℃ to NG (Natural Gas) at about 5℃. The vaporization device currently used is generally a vaporizer. Traditional vaporizers can be divided into two types according to the heat source classification: liquid heating and air heating. For LNG ships, since the water source is abundant and easy to obtain, liquid heating is generally used. A water pump is used to draw river water into the vaporizer to heat the LNG inside it, and the cooled river water is directly discharged back into the river. Although this method is convenient, the cooled river water is directly discharged back into the river without being used, resulting in a waste of energy. Summary of the invention

[0003] The present invention provides a diesel-LNG dual-fuel inland river fruit and vegetable cargo ship, which solves the problem of energy waste caused by not utilizing low-temperature river water after LNG vaporization.

[0004] The present invention is realized through the following technical scheme: a diesel-LNG dual-fuel inland fruit and vegetable cargo ship, comprising a hull, a diesel propeller, a gas propeller and a liquid storage tank, the hull is provided with a first power compartment, a second power compartment, a liquid storage tank and a cargo hold, the first power compartment, the second power compartment and the liquid storage tank are all arranged at the stern of the hull, the first power compartment and the second power compartment are respectively arranged below the main deck at the stern of the hull, the liquid storage tank is arranged on the main deck at the stern of the hull, and the cargo hold is arranged between the main deck at the stern of the hull and the bow of the hull; the diesel propeller is arranged in the first power compartment; the gas propeller is arranged in the first power compartment; the The inlet is arranged in the second power cabin; the liquid storage tank is fixedly arranged in the liquid storage tank, the outlet end of the liquid storage tank is connected to a vaporizer for vaporizing LNG, and the vaporizer is fixed on the hull; the vaporizer includes a shell and an LNG gas transmission bypass pipe, a water bath is arranged in the shell, two ends of the LNG gas transmission bypass pipe are respectively fixed to two ends of the shell, the middle part of the LNG gas transmission bypass pipe is erected in the water bath, the upper end of the water bath is provided with a water inlet, the lower end of the water bath is provided with a water outlet, the two ends of the LNG gas transmission bypass pipe are respectively provided with a liquefied natural gas inlet and a vaporized natural gas outlet, the liquefied natural gas The natural gas inlet is connected to the outlet end of the liquid storage tank, the vaporized natural gas outlet is connected to the gas propulsion unit, the water inlet is connected to a water pump, the water pump outlet is connected to river water, the water outlet is connected to a fresh-keeping device through a water pipe, and the fresh-keeping device is arranged in the cargo hold; the fresh-keeping device includes a humidifier and a plurality of radiators, the plurality of radiators include a first radiator, a second radiator, ... an Nth radiator connected in sequence through water pipes, the first radiator is connected to the water outlet, the Nth radiator is connected to the humidifier, the humidifier and the radiator are both arranged in the cargo hold, and the radiator includes An inner tube and a plurality of heat sinks, the inner tube is fixed to the side wall of the cargo hold, the heat sink is fixed to the outer wall of the inner tube, the humidifier comprises a water tank, an atomizer and a fan, the water tank is fixed to the side wall of the cargo hold, a water collecting port is provided at the bottom of the water tank, the water collecting port is connected to the Nth radiator through a water pipe, a drain port is provided in the middle of the side wall of the water tank, a mist outlet is provided at the upper part of the water tank, the atomizer is fixed in the water tank, the atomizer is higher than the drain port, the water suction port of the atomizer is lower than the drain port, the fan is provided in the mist outlet, and the drain port is connected to the outside of the hull through a water pipe.

[0005] Furthermore, an insulation pad is provided between the vaporizer and the hull. Since the vaporization of LNG will cause the temperature of the vaporizer to drop suddenly, the insulation pad can prevent the low temperature of the vaporizer from damaging the hull.

[0006] Furthermore, the heat sink is fixedly arranged on the side of the inner tube facing the interior of the cargo hold, and a plurality of the heat sinks are evenly arranged, so that the temperature of the water passing through the vaporizer diffuses into the cargo hold, achieving a good cooling effect.

[0007] Furthermore, heat-insulating cloth is provided on both sides of the cargo hold, and when the fresh-keeping device is not working, the heat-insulating cloth covers the fresh-keeping device.

[0008] Furthermore, a support plate is fixedly provided in the water tank, the support plate is higher than the drain port, a water leakage hole is provided on the support plate, and the atomizer is fixed on the support plate, so as to prevent the water in the water tank from splashing onto the atomizer when the boat shakes.

[0009] Furthermore, the water pipe of the water outlet connected to the radiator is wrapped with a heat preservation layer to maintain the temperature of the water passing through the evaporator.

[0010] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0011] 1. The diesel-LNG dual-fuel inland fruit and vegetable cargo ship of the present invention uses LNG and diesel as two fuels. When LNG is sufficient, the gas propulsion system is used, and when LNG is used up, the diesel propulsion system is used again, thereby reducing the use of diesel, saving energy and protecting the environment, and the cost of LNG is low.

[0012] 2. The diesel-LNG dual-fuel inland vegetable and fruit freight ship of the present invention is provided with a preservation device in the cargo hold, and the preservation device includes a radiator and a humidifier. In the process of vaporizing liquefied natural gas by the vaporizer, the liquefied natural gas absorbs the heat of the water in the water bath room, so that the temperature of the water in the water bath room is reduced, and the low-temperature water in the water bath room is transported to the cargo hold through a water pipe, and then the heat dissipation effect of the radiator is used to reduce the temperature in the cargo hold, so as to preserve the fresh vegetables and fruits in the cargo hold. The low-temperature mist sprayed by the humidifier increases the humidity in the cargo hold and maintains the moisture of the fresh vegetables and fruits in the cargo hold. The present invention makes full use of the heat absorption characteristic of LNG vaporization, and transports the low-temperature river water obtained after LNG vaporization to the cargo hold, and then the temperature in the cargo hold is reduced by the radiator, so as to preserve the fresh vegetables and fruits in the cargo hold, thereby improving energy utilization and saving energy.

[0013] 3. The humidifier of the present invention moisturizes the air in the cargo hold, the atomizer atomizes the water in the water tank into mist, and the fan discharges the mist into the cargo hold. Since the water temperature in the water tank is low, the temperature of the obtained mist is also low, so the mist can moisturize the cargo hold and cool the cargo hold at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a diesel-LNG dual-fuel inland fruit and vegetable cargo ship of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the vaporizer and the fresh-keeping device of the present invention;

[0016] Among them, 1-hull, 2-cargo hold, 3-first power compartment, 4-second power compartment, 5-liquid storage tank, 6-diesel propeller, 7-gas propeller, 8-liquid storage tank, 9-vaporizer, 91-shell, 92-LNG gas transmission bypass, 93-bathroom, 94-water inlet, 95-water outlet, 96-liquefied natural gas inlet, 97-vaporized natural gas outlet, 98-water pump, 10-radiator, 101-inner pipe, 102-heat sink, 11-humidifier, 111-water tank, 112-atomizer, 113-fan, 114-water collection port, 115-drainage port, 116-mist outlet. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Please refer to Figure 1 As shown, a diesel-LNG dual-fuel inland fruit and vegetable cargo ship includes a hull 1, a diesel propeller 6, a gas propeller 7 and a liquid storage tank 8. The diesel propeller 6, the gas propeller 7 and the liquid storage tank 8 are fixed on the hull 11 respectively, and the diesel propeller 6 and the gas propeller 7 are symmetrically arranged on both sides of the hull 1. The model of the diesel propeller 6 is YC6K295L-C20, the rated power is 218KW, and the rated speed is 1500r / min. The model of the gas propeller 7 is YC6K295LN-C20, the rated power is 218KW, and the rated speed is 1500r / min.

[0019] A first power compartment 3 and a second power compartment 4 are symmetrically arranged below the main deck at the rear of the hull 1, a liquid storage tank 5 is arranged on the main deck at the rear of the hull 1, a cargo hold 2 is arranged between the main deck at the rear of the hull 1 and the bow of the hull 1, the cargo hold 2 is provided with a roof and side walls, ventilation holes are arranged on the side walls of the cargo hold 2, exhaust fans are arranged in the ventilation holes, and heat insulation cloth is hung on the side walls of the cargo hold 2 on both sides.

[0020] The diesel propeller 6 is arranged in the first power compartment 3, the gas propeller 7 is arranged in the second power compartment 4, and the liquid storage tank 8 is fixed in the liquid storage tank 5. The liquid storage tank 8 is a marine LNG horizontal gas tank. The outlet end of the liquid storage tank 8 is connected to a vaporizer 9 for vaporizing LNG. The vaporizer 9 is fixed on the main deck of the hull 1, and an insulating pad is arranged between the vaporizer 9 and the hull 1. A liquid filling port is arranged on the top of the liquid storage tank 8, and the liquid filling port is connected to an LNG filling pipe. The end of the LNG filling pipe away from the liquid filling port is connected to a filling joint. When it is necessary to fill LNG into the liquid storage tank 8, the filling joint is connected to the filling station to fill LNG.

[0021] Please refer to Figure 2As shown, the vaporizer 9 includes a shell 91 and an LNG gas transmission pipe 92. A water bath chamber 93 is provided in the shell 91. Two ends of the LNG gas transmission pipe 92 are respectively fixed to the two ends of the shell 91. The middle part of the LNG gas transmission pipe 92 is erected in the water bath chamber 93. A water inlet 94 is provided on the right side of the upper end of the water bath chamber 93. A water outlet 95 is provided on the left side of the lower end of the water bath chamber 93. A liquefied natural gas inlet 96 is provided at the left end of the LNG gas transmission pipe 92. A vaporized natural gas outlet 97 is provided at the right end of the LNG gas transmission pipe 92. The liquefied natural gas inlet 96 is connected to the outlet end of the liquid storage tank 8 through an air pipe. The vaporized natural gas outlet 97 is connected to the gas propulsion unit 7 through an air pipe. The water inlet 94 is connected to a water pump 98. The water pump 98 is connected to the river water. The water outlet 95 is connected to a fresh-keeping device. The fresh-keeping device is provided in the cargo hold 2. When the fresh-keeping device is not working, the heat insulation cloth is pulled down to cover the fresh-keeping device.

[0022] Please refer to Figure 2 As shown, the fresh-keeping device includes a humidifier 11 and a plurality of radiators 10, the plurality of radiators 10 include a first radiator, a second radiator, ... an Nth radiator which are sequentially connected through water pipes, the first radiator is connected to the water outlet 95, the Nth radiator is connected to the humidifier 11, the radiator 10 and the humidifier 11 are both arranged in the cargo hold 2, the radiator 10 includes an inner tube 101 and a plurality of heat sinks 102, the inner tube 101 is fixed on the side wall of the cargo hold 2, the heat sink 102 is fixed on the side of the inner tube 101 facing the inside of the cargo hold 2, the plurality of heat sinks 102 are evenly arranged, the inner tubes 101 of the plurality of radiators 10 are sequentially connected through water pipes, the water pipe connecting the water outlet 95 to the radiator 10 is wrapped with a thermal insulation layer, and the thermal insulation layer is a sponge layer. The humidifier 11 includes a water tank 111, an atomizer 112 and a fan 113. A water collection port 114 is provided at the bottom of the water tank 111, and the water collection port 114 is connected to the inner tube 101 of the Nth radiator through a water pipe. A drain port 115 is provided in the middle of the side wall of the water tank 111, and a mist outlet 116 is provided at the upper part of the water tank 111. A support plate is fixedly provided in the water tank 111, the support plate is higher than the drain port 115, and a water leakage hole is provided on the support plate. The atomizer 112 is fixed on the support plate, and the water suction port of the atomizer 112 is connected to the water in the water tank 111. The fan 113 is provided in the mist outlet 116, and the drain port 115 is connected to the river water through a water pipe.

[0023] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A diesel-LNG dual-fuel inland fruit and vegetable cargo ship, characterized by: include A hull, wherein the hull is provided with a first power compartment, a second power compartment, a liquid storage tank and a cargo hold, wherein the first power compartment, the second power compartment and the liquid storage tank are all arranged at the stern of the hull, the first power compartment and the second power compartment are respectively arranged below the main deck at the stern of the hull, the liquid storage tank is arranged on the main deck at the stern of the hull, and the cargo hold is arranged between the main deck at the stern of the hull and the bow of the hull; A diesel propeller, wherein the diesel propeller is arranged in the first power compartment; a gas propulsion unit, the gas propulsion unit being arranged in the second power cabin; A liquid storage tank, the liquid storage tank is fixedly arranged in the liquid storage tank, the outlet end of the liquid storage tank is connected to a vaporizer for vaporizing LNG, and the vaporizer is fixed on the hull; The vaporizer comprises a shell and an LNG gas transmission bypass pipe, wherein a water bath chamber is provided in the shell, two ends of the LNG gas transmission bypass pipe are respectively fixed to two ends of the shell, the middle part of the LNG gas transmission bypass pipe is erected in the water bath chamber, a water inlet is provided at the upper end of the water bath chamber, a water outlet is provided at the lower end of the water bath chamber, a liquefied natural gas inlet and a vaporized natural gas outlet are respectively provided at two ends of the LNG gas transmission bypass pipe, the liquefied natural gas inlet is connected to the outlet end of the liquid storage tank, the vaporized natural gas outlet is connected to the gas propulsion device, the water inlet is connected to a water pump, the water pumping port of the water pump is connected to river water, the water outlet is connected to a fresh-keeping device through a water pipe, and the fresh-keeping device is arranged in the cargo hold; The fresh-keeping device includes a humidifier and a plurality of radiators, the plurality of radiators include a first radiator, a second radiator, and an Nth radiator which are sequentially connected through water pipes, the first radiator is connected to the water outlet, the Nth radiator is connected to the humidifier, the humidifier and the radiator are both arranged in the cargo hold, the radiator includes an inner tube and a plurality of radiating fins, the inner tube is fixed to the side wall of the cargo hold, the radiating fins are fixed to the outer wall of the inner tube, the humidifier includes a water tank, an atomizer and a fan, the water tank is fixed to the side wall of the cargo hold, a water collecting port is provided at the bottom of the water tank, the water collecting port is connected to the Nth radiator through a water pipe, a drain port is provided in the middle of the side wall of the water tank, a mist outlet is provided at the upper part of the water tank, the atomizer is fixed in the water tank, the atomizer is higher than the drain port, the water suction port of the atomizer is lower than the drain port, the fan is provided in the mist outlet, and the drain port is connected to the outside of the hull through a water pipe; In addition, a heat-insulating pad is provided between the vaporizer and the hull; heat-insulating cloth is also provided on both sides of the cargo hold, and when the fresh-keeping device is not working, the heat-insulating cloth covers the fresh-keeping device.

2. A diesel-LNG dual-fuel inland fruit and vegetable cargo ship according to claim 1, characterized in that: The heat sink is fixedly arranged on a side of the inner tube facing the interior of the cargo hold, and a plurality of the heat sinks are evenly arranged.

3. The diesel-LNG dual-fuel inland fruit and vegetable cargo ship according to claim 1, characterized in that: A support plate is fixedly arranged in the water tank, the support plate is higher than the drain port, a water leakage hole is arranged on the support plate, and the atomizer is fixed on the support plate.

4. The diesel-LNG dual-fuel inland fruit and vegetable cargo ship according to claim 1, characterized in that: The water pipe connecting the water outlet to the radiator is wrapped with a heat-insulating layer.

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