Water glycol cooling system

Abstract

The utility model discloses a water glycol cooling system which comprises a storage pipeline, a liquid outlet pipeline and a liquefied petroleum gas cooling pipeline, the storage pipeline comprises a storage cabinet, a liquid outlet pipeline and a liquid return pipeline. Water glycol is stored in the storage cabinet; a filling port is formed in the top of the storage cabinet; a drain outlet is formed in the bottom of the storage cabinet; an inlet of the liquid outlet pipeline is connected with the bottom of the storage cabinet, and the other end of the liquid outlet pipeline is connected with the inlet of the liquid outlet pipeline; a first ball valve is arranged on the liquid outlet pipeline; the liquid return pipeline is used for enabling the water glycol after cooling the liquefied petroleum gas to flow back into the storage cabinet; a second ball valve, a first pipeline filter, a water glycol pump and a third ball valve are sequentially arranged on the liquid outlet pipeline in the flowing direction of the water glycol; and a fourth ball valve, a second temperature sensor and a fifth ball valve are sequentially arranged on the liquefied petroleum gas cooling pipeline. According to the utility model, the liquefied petroleum gas in the liquefied petroleum gas system can be subjected to heat exchange in a closed system as required, is cooled and then is conveyed to an engine.

Description

Technical Field

[0001] The utility model relates to the technical field of ship auxiliary facilities, in particular to a water glycol cooling system. Background Art

[0002] On ships, because LPG (liquefied petroleum gas) is in a low-temperature liquefied state in the storage tank, it needs to be heated before entering the main engine and needs to be cooled after leaving the main engine. Generally, a conventional cooling and heating system is used, which is composed of a steam heating system, a seawater cooling system, etc.

[0003] In recent years, the use of LNG as liquefied petroleum gas for green ships has greatly increased the application of LNG propulsion technology in newly built ocean-going ships, whether from the market price advantage, the increasingly improved LNG supply chain, or the maturity of application technology. In the next 3 to 5 years, among the available carbon-neutral or zero-carbon liquefied petroleum gases, LNG liquefied petroleum gas technology will still be one of the most important technical paths for green ships. The supply of liquefied petroleum gas is mainly through the role of compressors, evaporators, heaters, gas buffer cabinets and other equipment, which jointly provide gas liquefied petroleum gas that meets the use requirements of the main and auxiliary engines and boilers. Unlike fuel supply, the LNG liquefied petroleum gas supply process must complete the phase transition from liquid to gas. Therefore, the liquid liquefied petroleum gas needs to be heated, and the gas liquefied petroleum gas generated after heating may also need to be pressurized and then transported to the engine. Utility Model Content

[0004] The utility model aims to provide a water glycol cooling system, which can heat exchange the liquefied petroleum gas in the liquefied petroleum gas system in a closed system as needed to cool it and then transport it to the engine.

[0005] In order to achieve the purpose of the above utility model, a water glycol cooling system is provided, including a storage pipeline, a liquid outlet pipeline and a liquefied petroleum gas cooling pipeline;

[0006] The storage pipeline includes a storage cabinet, a liquid outlet pipeline and a liquid return pipeline.

[0007] Water glycol is stored in the storage cabinet;

[0008] A filling port is provided on the top of the storage cabinet;

[0009] A sewage outlet is provided at the bottom of the storage cabinet;

[0010] The inlet of the liquid outlet pipe is connected to the bottom of the storage cabinet, and the other end of the liquid outlet pipe is connected to the inlet of the liquid outlet pipeline;

[0011] The liquid outlet pipeline is provided with a first ball valve;

[0012] The liquid return pipe is used to return the water glycol after cooling the liquefied petroleum gas to the storage cabinet;

[0013] The liquid outlet pipeline is provided with a second ball valve, a first pipeline filter, a water glycol pump and a third ball valve in sequence along the flow direction of the water glycol;

[0014] The liquefied petroleum gas cooling pipeline is provided with a fourth ball valve, a second temperature sensor and a fifth ball valve in sequence.

[0015] Preferably, a liquid level meter is provided in the storage cabinet.

[0016] Preferably, a ventilation hole is also provided on the top of the storage cabinet.

[0017] Preferably, a spare liquid outlet pipeline is also connected in parallel to the liquid outlet pipeline, and a spare second ball valve, a spare first pipeline filter, a spare water glycol pump and a spare third ball valve are sequentially arranged on the spare liquid outlet pipeline along the flow direction of the water glycol;

[0018] A first stop check valve is provided between the standby water glycol pump and the standby third ball valve, and between the water glycol pump and the third ball valve.

[0019] Furthermore, a first pressure sensor and a first temperature sensor are provided at the input end of the liquid outlet pipeline, and a second pressure sensor is provided at the output end of the liquid outlet pipeline.

[0020] Preferably, it also includes a seawater cooling pipeline, which includes a seawater circulation pipeline, a water glycol cooling pipeline and a first heat exchanger;

[0021] The seawater circulation pipeline is provided with a seawater inlet, a sixth ball valve, a third pressure sensor, the first heat exchanger, a first pressure regulating valve, a second pipeline filter, a fourth pressure sensor, a seventh ball valve and a seawater outlet in sequence along the flow direction of the seawater;

[0022] The first heat exchanger is connected to the seawater circulation pipeline via the seawater pipeline inside the first heat exchanger.

[0023] The water glycol cooling pipeline is connected in parallel with the fourth ball valve;

[0024] The water glycol pipeline to be cooled is provided with an eighth ball valve, the first heat exchanger and a ninth ball valve in sequence along the flow direction of the water glycol;

[0025] The first heat exchanger is connected to the water glycol pipeline to be cooled via the water glycol pipeline inside the first heat exchanger.

[0026] Furthermore, it also includes a steam heating pipeline, which includes a steam circulation pipeline, a water glycol pipeline to be heated, and a second heat exchanger;

[0027] The steam circulation pipeline is provided with a steam inlet, a tenth ball valve, a second pressure regulating valve, a fifth pressure sensor, the second heat exchanger, an eleventh ball valve, a second stop check valve and a coolant outlet in sequence along the steam flow direction;

[0028] The second heat exchanger is connected to the steam circulation pipeline via the steam pipeline inside the second heat exchanger;

[0029] The water glycol pipeline to be heated is connected in parallel with the fifth ball valve;

[0030] The water glycol pipeline to be heated is provided with a twelfth ball valve, the second heat exchanger and a thirteenth ball valve in sequence along the flow direction of the water glycol;

[0031] The second heat exchanger is connected to the water glycol pipeline to be heated via the water glycol pipeline inside the second heat exchanger.

[0032] Preferably, a steam pump liquid storage tank is also provided on the steam circulation pipeline between the eleventh ball valve and the second stop check valve, the steam outlet on the steam pump liquid storage tank is connected to the pipeline between the tenth ball valve and the second pressure regulating valve through a pipeline, and a fourteenth ball valve is provided on the pipeline connected to the steam outlet on the steam pump liquid storage tank.

[0033] Preferably, a third pipeline filter is further provided on the steam circulation pipeline between the tenth ball valve and the second pressure regulating valve.

[0034] The water glycol cooling system of the utility model has the following advantages:

[0035] (1) The liquefied petroleum gas in the liquefied petroleum gas system can be heat exchanged in a closed system as needed to cool it down and then transported to the engine; only water glycol enters the heat exchanger in the combustion system to exchange heat with the liquefied petroleum gas, which has little corrosiveness to the heat exchanger in the combustion system and will not cause damage to the main engine;

[0036] (2) Water glycol can be cooled or heated as needed, and the liquefied petroleum gas in the combustion system can be cooled and heated at the same time;

[0037] (3) Closed circulation system with small loss, easy operation and cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the water glycol cooling system of this embodiment;

[0039] Figure 2 is a schematic diagram of the storage pipeline in this embodiment;

[0040] Figure 3 Schematic diagram of the water outlet pipeline in this embodiment;

[0041] Figure 4 is a schematic diagram of a liquefied petroleum gas cooling pipeline and a steam heating pipeline in this embodiment;

[0042] Figure 5 Schematic diagram of the structure of the seawater cooling pipeline in this embodiment. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] like Figure 1 As shown, the water glycol cooling system includes a storage pipeline, a liquid outlet pipeline and a liquefied petroleum gas cooling pipeline.

[0045] like Figure 2 As shown, the storage pipeline includes a storage cabinet 1, a liquid outlet pipeline 2 and a liquid return pipeline 3.

[0046] Water glycol is stored in the storage cabinet 1; a filling port 4 is provided on the top of the storage cabinet 1, and when the circulating water glycol needs to be increased, liquid is added through the filling port 4; a sewage outlet 5 is provided at the bottom of the storage cabinet 1, and after the water glycol is circulated for a long time, it can be discharged to an external pipeline for treatment through the sewage outlet 5.

[0047] The inlet of the liquid outlet pipe 2 is connected to the bottom of the storage cabinet 1, and the other end of the liquid outlet pipe 2 is connected to the inlet of the liquid outlet pipeline; Figure 3 As shown, a first ball valve 8 is provided on the liquid outlet pipe 2 .

[0048] The liquid return pipe 3 is used for cooling the water glycol after the liquefied petroleum gas and returning it to the storage cabinet.

[0049] In this embodiment, a liquid level meter 6 is provided in the storage cabinet 1 to monitor the liquid level in the storage cabinet 1 in real time.

[0050] In this embodiment, the top of the storage cabinet 1 is further provided with an air vent 7 to facilitate the discharge of the remaining air in the entire cooling system.

[0051] like Figure 3 As shown, the liquid outlet pipeline is provided with a second ball valve 9, a first pipeline filter 10, a water glycol pump 11 and a third ball valve 12 in sequence along the flow direction of the water glycol; the water glycol in the storage cabinet flows into the liquid outlet pipeline through the liquid outlet pipeline 2, and after filtering impurities through the first pipeline filter 10, it is pressurized and pumped out to the liquefied petroleum gas cooling pipeline through the water glycol pump 11.

[0052] In this embodiment, if Figure 3As shown, a spare liquid outlet pipeline is also connected in parallel to the liquid outlet pipeline, and a spare second ball valve 13, a spare first pipeline filter 14, a spare water glycol pump 15 and a spare third ball valve 16 are sequentially arranged on the spare liquid outlet pipeline along the flow direction of water glycol; a first stop check valve 17 is arranged between the spare water glycol pump 15 and the spare third ball valve 16, and between the water glycol pump 11 and the third ball valve 13 to prevent the backflow of water glycol; with such an arrangement, when there is a problem with the liquid outlet pipeline, the liquid can work normally through the spare liquid outlet pipeline.

[0053] In this embodiment, a first pressure sensor 18 and a first temperature sensor 19 are provided at the input end of the liquid outlet pipeline, and a second pressure sensor 20 is provided at the output end of the liquid outlet pipeline, so as to detect the temperature of the water glycol before entering the water glycol pump, and the pressure difference of the water glycol before and after the liquid outlet pipeline.

[0054] like Figure 4 As shown, the liquefied petroleum gas cooling pipeline is provided with a fourth ball valve 21, a second temperature sensor 22 and a fifth ball valve 23 in sequence; water glycol passes through the liquefied petroleum gas cooling pipeline and enters the liquefied petroleum gas system to cool the liquefied petroleum gas.

[0055] like Figure 5 As shown, the water glycol cooling system of this embodiment further includes a seawater cooling pipeline, and the seawater cooling pipeline includes a seawater circulation pipeline, a water glycol pipeline to be cooled and a first heat exchanger 24 .

[0056] The seawater circulation pipeline is provided with a seawater inlet 25, a sixth ball valve 26, a third pressure sensor 27, the first heat exchanger 24, a first pressure regulating valve 28, a second pipeline filter 29, a fourth pressure sensor 30, a seventh ball valve 31 and a seawater outlet 32 ​​in sequence along the flow direction of seawater; the first heat exchanger 24 is connected to the seawater circulation pipeline through its internal seawater pipeline.

[0057] The water glycol pipeline to be cooled is connected in parallel with the fourth ball valve 21; the water glycol pipeline to be cooled is provided with an eighth ball valve 33, the first heat exchanger 24 and a ninth ball valve 34 in sequence along the flow direction of the water glycol; the first heat exchanger 24 is connected to the water glycol pipeline to be cooled through the water glycol pipeline inside it.

[0058] With such arrangement, when the water glycol temperature is too high and needs to be cooled, the fourth ball valve 21 is closed, and the water glycol to be cooled flows into the water glycol cooling pipeline and the seawater in the seawater circulation pipeline for heat exchange in the first heat exchanger 24, and then flows into the liquefied petroleum gas cooling pipeline.

[0059] like Figure 4As shown, the water glycol cooling system of this embodiment further includes a steam heating pipeline, and the steam heating pipeline includes a steam circulation pipeline, a water glycol pipeline to be heated and a second heat exchanger 35.

[0060] The steam circulation pipeline is provided with a steam inlet 36, a tenth ball valve 37, a second pressure regulating valve 38, a fifth pressure sensor 39, the second heat exchanger 35, an eleventh ball valve 40, a second stop check valve 41 and a coolant outlet 42 in sequence along the steam flow direction; the second heat exchanger 35 is connected to the steam circulation pipeline through its internal steam pipeline.

[0061] The water glycol pipeline to be heated is connected in parallel with the fifth ball valve 23; the twelfth ball valve 43, the second heat exchanger 35 and the thirteenth ball valve 44 are sequentially arranged on the water glycol pipeline to be heated along the flow direction of water glycol; the second heat exchanger 35 is connected to the water glycol pipeline to be heated through the water glycol pipeline inside it.

[0062] With such arrangement, when the temperature of the water glycol is too low, before the water glycol exchanges heat with the liquefied petroleum gas in the combustion system, the fifth valve 23 is closed, and the water glycol to be heated flows into the water glycol heating pipeline, and exchanges heat with the steam in the steam circulation pipeline in the second heat exchanger 35, and then the heated water glycol enters the liquefied petroleum gas cooling pipeline.

[0063] Furthermore, in the present embodiment, a steam pump liquid storage tank 45 is provided between the eleventh ball valve 40 and the second stop check valve 41 on the steam circulation pipeline, and the steam outlet 46 on the steam pump liquid storage tank 45 is connected to the pipeline between the tenth ball valve 37 and the second pressure regulating valve 38 through a pipeline, and a fourteenth ball valve 47 is provided on the pipeline connected to the steam outlet 46 on the steam pump liquid storage tank 45; with such an arrangement, part of the steam is not liquefied, but flows back to the second heat exchanger 35 through the pipeline connected to the steam outlet 46 on the steam liquid storage tank 45 to exchange heat with water glycol again, thereby improving the utilization rate of the steam.

[0064] In this embodiment, if Figure 4 As shown, a third pipeline filter 48 is provided between the tenth ball valve 37 and the second pressure regulating valve 38 on the steam circulation pipeline to filter the steam and remove impurities.

[0065] The water glycol cooling system of this embodiment is a closed system with small losses, simple operation, cost savings, and effective prevention of seawater from entering the liquefied petroleum gas system and causing damage.

[0066] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. Water glycol cooling system, characterized in that: Including storage pipeline, liquid outlet pipeline and liquefied petroleum gas cooling pipeline; The storage pipeline includes a storage cabinet, a liquid outlet pipeline and a liquid return pipeline; Water glycol is stored in the storage cabinet; A filling port is provided on the top of the storage cabinet; A sewage outlet is provided at the bottom of the storage cabinet; The inlet of the liquid outlet pipe is connected to the bottom of the storage cabinet, and the other end of the liquid outlet pipe is connected to the inlet of the liquid outlet pipeline; The liquid outlet pipeline is provided with a first ball valve; The liquid return pipe is used to return the water glycol after cooling the liquefied petroleum gas to the storage cabinet; The liquid outlet pipeline is provided with a second ball valve, a first pipeline filter, a water glycol pump and a third ball valve in sequence along the flow direction of the water glycol; The liquefied petroleum gas cooling pipeline is provided with a fourth ball valve, a second temperature sensor and a fifth ball valve in sequence.

2. The water glycol cooling system according to claim 1, characterized in that: A liquid level meter is arranged in the storage cabinet.

3. The water glycol cooling system according to claim 1 or 2, characterized in that: The top of the storage cabinet is also provided with a ventilation opening.

4. The water glycol cooling system according to claim 1, characterized in that: The liquid outlet pipeline is also connected in parallel with a spare liquid outlet pipeline, and a spare second ball valve, a spare first pipeline filter, a spare water glycol pump and a spare third ball valve are sequentially arranged on the spare liquid outlet pipeline along the flow direction of the water glycol; A first stop check valve is provided between the standby water glycol pump and the standby third ball valve, and between the water glycol pump and the third ball valve.

5. The water glycol cooling system according to claim 1 or 4, characterized in that: The input end of the liquid outlet pipeline is provided with a first pressure sensor and a first temperature sensor, and the output end of the liquid outlet pipeline is provided with a second pressure sensor.

6. The water glycol cooling system according to claim 1, characterized in that: It also includes a seawater cooling pipeline, which includes a seawater circulation pipeline, a water glycol cooling pipeline and a first heat exchanger; The seawater circulation pipeline is provided with a seawater inlet, a sixth ball valve, a third pressure sensor, the first heat exchanger, a first pressure regulating valve, a second pipeline filter, a fourth pressure sensor, a seventh ball valve and a seawater outlet in sequence along the flow direction of the seawater; The first heat exchanger is connected to the seawater circulation pipeline via the seawater pipeline inside the first heat exchanger; The water glycol cooling pipeline is connected in parallel with the fourth ball valve; The water glycol cooling pipeline is provided with an eighth ball valve, the first heat exchanger and a ninth ball valve in sequence along the flow direction of the water glycol; The first heat exchanger is connected to the water glycol pipeline to be cooled via the water glycol pipeline inside the first heat exchanger.

7. The water glycol cooling system according to claim 1 or 6, characterized in that: It also includes a steam heating pipeline, which includes a steam circulation pipeline, a water glycol pipeline to be heated and a second heat exchanger; The steam circulation pipeline is provided with a steam inlet, a tenth ball valve, a second pressure regulating valve, a fifth pressure sensor, the second heat exchanger, an eleventh ball valve, a second stop check valve and a coolant outlet in sequence along the steam flow direction; The second heat exchanger is connected to the steam circulation pipeline via the steam pipeline inside the second heat exchanger; The water glycol pipeline to be heated is connected in parallel with the fifth ball valve; The water glycol pipeline to be heated is provided with a twelfth ball valve, the second heat exchanger and a thirteenth ball valve in sequence along the flow direction of the water glycol; The second heat exchanger is connected to the water glycol pipeline to be heated via the water glycol pipeline inside the second heat exchanger.

8. The water glycol cooling system according to claim 7, characterized in that: A steam pump liquid storage tank is also provided on the steam circulation pipeline between the eleventh ball valve and the second stop check valve. The steam outlet on the steam pump liquid storage tank is connected to the pipeline between the tenth ball valve and the second pressure regulating valve through a pipeline, and a fourteenth ball valve is provided on the pipeline connected to the steam outlet on the steam pump liquid storage tank.

9. The water glycol cooling system according to claim 8, characterized in that: A third pipeline filter is also provided on the steam circulation pipeline between the tenth ball valve and the second pressure regulating valve.

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