Gas heat preservation device based on LNG fuel ship
By using gas bypass pipes and PLC control systems on LNG fuel ships, the gas temperature is automatically adjusted, which solves the high energy consumption and safety hazards in the gas preparations, and achieves rapid increase in gas temperature and reduction in energy consumption.
Patent Information
- Application Number
- CN202422538410.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The temperature management of existing LNG fuel ships in the gas preparation room has high energy consumption and safety risks, especially the serious gas waste when the heat tracing facilities fail.
The gas bypass pipe is used to return the low-temperature gas in the gas buffer tank to the LNG fuel compartment and heat it through the LNG heating evaporator. Combined with the temperature sensor and the PLC control system, the gas bypass and main valve are automatically adjusted to ensure that the gas temperature meets the requirements of the consumption equipment and avoid the use of heat tracing facilities.
Increase the gas temperature in a short time, reduce energy consumption, improve the safety of gas ships, and avoid gas waste and equipment damage.
Smart Images
Figure CN223165396U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of LNG fuel ships, and specifically, to a gas heat preservation device based on an LNG fuel ship. Background Art
[0002] With the strong promotion of low-carbon economy, the development of green shipping, and the construction of low-carbon ships at home and abroad, LNG has gradually become the main ship energy due to its advantages such as clean emissions, convenient storage and transportation, and high utilization efficiency.
[0003] Due to the existence of forced ventilation and low-temperature systems, the minimum designed temperature in the gas preparation room of LNG fuel ships needs to be the same as the minimum outside air temperature. For LNG fuel ships in unrestricted navigation areas, the minimum designed value of the outside air temperature is generally below -10°C, while the gas equipment generally requires the LNG fuel inlet temperature to be above 0°C. For MAN ME-GI main engines, the LNG fuel inlet temperature needs to reach above 30°C.
[0004] To solve the problems of gas heat preservation during long-term fuel mode operation and gas standby operation, the conventional solution is to add heat tracing facilities and implement heat preservation for the part from the gas heating evaporator to the gas buffer tank, so as to avoid the decrease or even liquefaction of the gas temperature, which affects the use. However, the heat tracing facilities need to continuously consume energy. At the same time, if the heat tracing facilities fail, the low-temperature gas can only be vented, resulting in the problem of LNG fuel waste and even potential safety hazards. Summary of the Utility Model
[0005] Aiming at the problems existing in the prior art, the utility model provides a gas heat preservation device based on an LNG fuel ship, which can increase the temperature of the gas in a short time, avoid using heat tracing facilities, reduce energy consumption, and improve the safety of LNG fuel ships.
[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme: A gas heat preservation device based on an LNG fuel ship, comprising: an LNG fuel tank, an LNG heating evaporator, a gas buffer tank, a gas bypass pipe, and a gas consumption device. The LNG fuel outlet of the LNG fuel tank is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator. The gas outlet of the LNG fuel heating evaporator is fixedly connected to the gas inlet of the gas buffer tank. The gas outlet of the gas buffer tank is fixedly connected to the gas inlet of the gas consumption device. A bypass port is provided on the gas buffer tank, and the bypass port is fixedly connected to the gas inlet of the LNG fuel tank through the gas bypass pipe.
[0007] Further, a temperature sensor is provided on the gas buffer tank, and the temperature sensor is used to measure the gas temperature in the gas buffer tank.
[0008] Further, a gas bypass control valve is provided on the gas bypass pipe.
[0009] Further, a main gas valve is provided between the gas outlet of the gas buffer tank and the gas inlet of the gas-consuming equipment.
[0010] Further, it further includes: a control box, which is respectively connected to the temperature sensor, the gas bypass control valve, and the main gas valve. The temperature sensor feeds back the measured gas temperature in the gas buffer tank to the control box. If the measured gas temperature in the gas buffer tank is lower than the operating temperature of the gas-consuming equipment, the control box controls the main gas valve to close and the gas bypass control valve to open.
[0011] Further, the control box is a PLC control box of Siemens S7-1500 model, the temperature sensor is of PT100 model, the gas bypass control valve is of HABONIM-P05-F27W-66MMWTG-BW160 model, and the main gas valve is of HABONIM-P10-F27W-66MMWTG-BWXXS model; the power signal terminals of the temperature sensor, the gas bypass control valve, and the main gas valve are all connected to the power output terminal of the PLC control box, the signal output port of the temperature sensor is connected to the AI port of the PLC control box, the signal control terminal of the gas bypass control valve is connected to the first AO port of the PLC control box, and the signal control terminal of the main gas valve is connected to the second AO port of the PLC control box.
[0012] Further, an LNG pump is provided in the LNG fuel tank. The inlet of the LNG pump accesses the LNG fuel in the LNG fuel tank, and the outlet of the LNG pump is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator.
[0013] Further, the power signal terminal of the LNG pump is connected to the power output terminal of the control box.
[0014] Compared with the prior art, the present utility model has the following beneficial effects: The gas heat preservation device based on the LNG fuel ship of the present utility model returns the low-temperature gas in the gas buffer tank to the LNG fuel tank through the gas bypass pipe, and supplements the heated gas to the gas buffer tank, which can increase the temperature of the gas in a short time, avoid using heat tracing facilities, reduce energy consumption, and improve the safety of the LNG fuel ship. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the gas heat preservation device based on the LNG fuel ship of the present utility model;
[0016] Among them, 1. LNG fuel tank, 2. LNG pump, 3. LNG heating evaporator, 4. Gas buffer tank, 5. Temperature sensor, 6. Control box, 7. Gas bypass control valve, 8. Gas bypass pipe, 9. Gas main valve, 10. Gas consumption equipment. Specific implementation manner
[0017] The technical solution of the present utility model will be further explained below in conjunction with the accompanying drawings.
[0018] As Figure 1 This is a schematic diagram of the gas heat preservation device based on the LNG fuel ship of the present utility model. The gas heat preservation device includes: an LNG fuel tank 1, an LNG heating evaporator 3, a gas buffer tank 4, a gas bypass pipe 8, and a gas consumption equipment 10. The LNG fuel outlet of the LNG fuel tank 1 is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator 3. The gas outlet of the LNG fuel heating evaporator 3 is fixedly connected to the gas inlet of the gas buffer tank 4. The gas outlet of the gas buffer tank 4 is fixedly connected to the gas inlet of the gas consumption equipment 10. A bypass port is provided on the gas buffer tank 4, and the bypass port is fixedly connected to the gas inlet of the LNG fuel tank 1 through the gas bypass pipe 8. The present utility model can return the low-temperature gas in the gas buffer tank 4 to the LNG fuel tank 1 through the gas bypass pipe 8 and supplement the heated gas to the gas buffer tank 1. Therefore, the gas heat preservation device can increase the temperature of the gas in a short time, avoid using heat tracing facilities, reduce energy consumption, and improve the safety of the LNG fuel ship.
[0019] A temperature sensor 5 is provided on the gas buffer tank 4 of the present utility model. The temperature sensor 5 is used to measure the gas temperature in the gas buffer tank 4. In a technical solution of the present utility model, the model of the temperature sensor 5 is PT100.
[0020] A gas bypass control valve 7 is provided on the gas bypass pipe 8 of the present utility model. When the gas temperature in the gas buffer tank 4 is lower than the operating temperature of the gas consumption equipment 10, the bypass control valve 7 opens, and part of the low-temperature gas flows back to the LNG fuel tank 1 through the gas bypass pipe 8. The LNG fuel in the LNG fuel tank 1 enters the LNG fuel heating evaporator 3 for heating, so that the high-temperature gas enters the gas buffer tank 4, thereby increasing the gas temperature in the gas buffer tank 4; otherwise, the bypass control valve 7 closes to avoid high-temperature gas bypass, reduce energy consumption, and at the same time avoid excessive pressure increase in the LNG fuel tank 1 caused by high-temperature gas bypass, damaging the LNG fuel tank 1. In a technical solution of the present utility model, the model of the gas bypass control valve 7 is HABONIM-P05-F27W-66MMWTG-BW160; in addition, the pipe diameter of the gas bypass pipe 8 is smaller than that of the gas main pipe but not less than DN15, so as to meet the bypass rate while improving the bypass flow control accuracy.
[0021] A gas main valve 9 is provided between the gas outlet of the gas buffer tank 4 of the present utility model and the gas inlet of the gas consumption device 10. When the gas temperature in the gas buffer tank 4 is lower than the operating temperature of the gas consumption device 10, the gas main valve 9 closes to prevent low-temperature gas from entering the gas consumption device 10 and damaging the gas consumption device 10. In a technical solution of the present utility model, the model of the gas main valve 9 is HABONIM-P10-F27W-66MMWTG-BWXXS.
[0022] The present utility model further includes: a control box 6, which is respectively connected to a temperature sensor 5, a gas bypass control valve 7, and a gas main valve 9. In the present utility model, the model of the control box 6 is a PLC control box of the Siemens S7-1500 model. The power signal terminals of the temperature sensor 5, the gas bypass control valve 7, and the gas main valve 9 are all connected to the power output terminal of the PLC control box to supply power to the temperature sensor 5, the gas bypass control valve 7, and the gas main valve 9 through the PLC control box; the signal output port of the temperature sensor 5 is connected to the AI port of the PLC control box, the signal control end of the gas bypass control valve 7 is connected to the first AO port of the PLC control box, and the signal control end of the gas main valve 9 is connected to the second AO port of the PLC control box. The temperature sensor 5 feeds back the measured gas temperature in the gas buffer tank 4 to the control box 6. If the measured gas temperature in the gas buffer tank 4 is lower than the operating temperature of the gas consumption device 10, the control box 6 controls the gas main valve 9 to close and the gas bypass control valve 7 to open; otherwise, the control box 6 controls the gas main valve 9 to open and the gas bypass control valve 7 to close.
[0023] In a technical solution of the present utility model, an LNG pump 2 is provided in the LNG fuel tank 1. The inlet of the LNG pump 2 accesses the LNG fuel in the LNG fuel tank 1, and the outlet of the LNG pump 2 is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator 3, so as to quickly transfer the LNG fuel in the LNG fuel tank 1 to the LNG fuel heating evaporator 3; and the power signal terminal of the LNG pump 2 is connected to the power output terminal of the control box 6, and the opening and closing of the LNG pump 2 are controlled through the control box 6.
[0024] Before the gas main valve 9 is opened, the gas heat preservation device based on the LNG fuel ship of the present utility model judges whether the gas temperature meets the gas start-up operation requirements of the gas consumption equipment 10 through the temperature sensor 5 installed on the gas buffer tank 4. If the gas temperature does not meet the requirements, the gas bypass control valve 7 on the gas bypass pipe 8 is controlled to open by the control box 6, and the low-temperature gas is transmitted to the LNG fuel tank 1 through the gas bypass pipe 8; the LNG fuel in the LNG fuel tank 1 is continuously transported to the LNG fuel heating evaporator 3 to be heated into gas and transmitted to the gas buffer tank 4. When the gas temperature in the gas buffer tank 4 meets the gas start-up operation requirements of the gas consumption equipment 10, the control box 6 controls the closing of the gas bypass control valve 7. At the same time, the control box 6 controls the opening of the gas main valve 9, and the gas that meets the gas start-up operation requirements of the gas consumption equipment 10 is transmitted to the gas consumption equipment 10 for combustion energy supply.
[0025] The gas heat preservation device based on the LNG fuel ship of the present utility model judges the gas temperature condition before each gas start-up, and increases the gas temperature in the gas buffer tank 4 in a short time, ensuring the normal operation and safety of the gas consumption equipment 10, avoiding the continuous consumption of the heat tracing energy in the long-term fuel mode, and reducing the energy consumption.
[0026] The above is only the preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above embodiment. All technical solutions within the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, several improvements and retouches without departing from the principle of the present utility model should be regarded as the protection scope of the present utility model.
Claims
1. A gas insulation device for LNG fuel ships, characterized in that Comprising: An LNG fuel tank (1), an LNG heating evaporator (3), a gas buffer tank (4), a gas bypass pipe (8), and a gas consumption device (10). The LNG fuel outlet of the LNG fuel tank (1) is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator (3). The gas outlet of the LNG fuel heating evaporator (3) is fixedly connected to the gas inlet of the gas buffer tank (4). The gas outlet of the gas buffer tank (4) is fixedly connected to the gas inlet of the gas consumption device (10). A bypass port is provided on the gas buffer tank (4), and the bypass port is fixedly connected to the gas inlet of the LNG fuel tank (1) through the gas bypass pipe (8).
2. The gas heat preservation device for an LNG fuel ship according to claim 1, wherein A temperature sensor (5) is provided on the gas buffer tank (4), and the temperature sensor (5) is used to measure the gas temperature inside the gas buffer tank (4).
3. The gas heat preservation device based on an LNG fuel ship according to claim 2, characterized in that, A gas bypass control valve (7) is provided on the gas bypass pipe (8).
4. The gas heat preservation device based on an LNG fuel ship according to claim 3, characterized in that, A gas main valve (9) is provided between the gas outlet of the gas buffer tank (4) and the gas inlet of the gas consumption device (10).
5. The gas heat preservation device based on an LNG fuel ship according to claim 4, wherein Also comprising: A control box (6). The control box (6) is respectively connected to the temperature sensor (5), the gas bypass control valve (7), and the gas main valve (9). The temperature sensor (5) feeds back the measured gas temperature inside the gas buffer tank (4) to the control box (6). If the measured gas temperature inside the gas buffer tank (4) is lower than the operating temperature of the gas consumption device (10), the control box (6) controls the gas main valve (9) to close and the gas bypass control valve (7) to open.
6. The gas heat preservation device based on an LNG fuel ship according to claim 5, wherein, The control box (6) is a PLC control box of the Siemens S7-1500 model. The model of the temperature sensor (5) is PT100. The model of the gas bypass control valve (7) is HABONIM-P05-F27W-66MMWTG-BW160. The model of the gas main valve (9) is HABONIM-P10-F27W-66MMWTG-BWXXS. The power signal terminals of the temperature sensor (5), the gas bypass control valve (7), and the gas main valve (9) are all connected to the power output terminal of the PLC control box. The signal output port of the temperature sensor (5) is connected to the AI port of the PLC control box. The signal control terminal of the gas bypass control valve (7) is connected to the first AO port of the PLC control box. The signal control terminal of the gas main valve (9) is connected to the second AO port of the PLC control box.
7. The gas heat preservation device based on an LNG fuel ship according to claim 6, characterized in that, An LNG pump (2) is provided in the LNG fuel tank (1). The inlet of the LNG pump (2) accesses the LNG fuel in the LNG fuel tank (1). The outlet of the LNG pump (2) is fixedly connected to the LNG fuel inlet of the LNG fuel heating evaporator (3).
8. A gas heat preservation device based on an LNG fuel ship according to claim 7, characterized in that, The power signal terminal of the LNG pump (2) is connected to the power output terminal of the control box (6).