CN116181534A - Secondary pressurizing methanol supply system and supply method - Google Patents

Abstract

The invention provides a secondary pressurizing methanol supply system and a supply method, wherein the system comprises the following steps: a methanol supply pump, a methanol heat exchanger, a filtering device and a methanol booster pump; the methanol supply pump pumps and conveys the methanol fuel to the methanol heat exchanger in a pressurizing mode; the methanol heat exchanger is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device; the methanol booster pump is used for boosting the methanol fuel to the pressure required by the methanol consumption device again; the filtering device is used for filtering the methanol fuel to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device. According to the invention, the stable transportation of the methanol fuel from the methanol fuel tank to the methanol booster pump can be ensured without arranging a daily tank, the daily tank for methanol and a matched transportation unit between the daily tank and a methanol fuel cabin are reduced, the space occupation is reduced, and the equipment cost input of a methanol system is also reduced.

Description

Secondary pressurizing methanol supply system and supply method

Technical Field

The invention relates to the technical field of ship supply systems, in particular to a secondary pressurizing methanol supply system without a daily tank and a supply method.

Background

In the face of increasingly stringent emissions regulations for ships, in order to achieve the goals of carbon neutralization and carbon peaking, the shipping industry is actively looking for solutions, many new fuels such as: fuels such as methanol, ammonia, and LNG have received extensive attention from designers, shipyards, shipowners, and renters. LNG fuel has been widely used as a marine fuel, but since it requires low-temperature storage, it is required to support additional input costs for such a characteristic in use, and a supply chain dedicated to LNG is also required to input a large amount of cost.

Methanol has the potential of reducing carbon dioxide emission during ship operation because of normal-temperature liquid storage, and attracts wide interest of ocean vessels, short-distance shipping, ferries, mail wheels and inland vessels. The global methanol industry association chief executive officer gregorie Dolan indicated that: "methanol can provide immediate decarbonization benefits to ship operators as a marine fuel: the net emission of greenhouse gases is greatly reduced, the requirements of IMO 2020 are completely met, and the renewable methanol yield is increased to be in the clean carbon neutralization. "indeed, methanol fuels are a preferred alternative to fuels for the shipping industry. However, because the calorific value of the methanol fuel is low, the required methanol reserves of the same voyage are larger than the fuel reserves, a larger and deeper fuel cabin needs to be configured, and because the methanol is easy to volatilize, has toxicity and other attributes, the arrangement scheme of the marine methanol fuel supply system still keeps the conventional fuel ship arrangement scheme, and is provided with a daily tank, but the daily tank stores the processed fuel (such as processed residual oil) when in main function, and arranges a methanol heat exchanger and a filtering device at the downstream of a methanol booster pump, thereby causing redundancy of an arrangement structure, high space occupation, high operation pressure of required working equipment and high cost investment.

Disclosure of Invention

The invention provides a secondary pressurizing methanol supply system without a daily tank and a supply method thereof aiming at the defects in the prior art.

According to one aspect of the present invention, there is provided a secondary pressurized methanol supply system comprising: the methanol supply pump, the methanol heat exchanger, the filtering device and the methanol booster pump are sequentially arranged; wherein:

the methanol supply pump pumps and conveys the methanol fuel to the methanol heat exchanger in a pressurizing mode;

the methanol heat exchanger is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the filtering device for filtering;

the methanol booster pump is used for boosting the methanol fuel subjected to heat exchange and filtration to the pressure required by the methanol consumption device again, so as to obtain pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

Optionally, the methanol heat exchanger adopts a double-plate heat exchanger or a double-shell heat exchanger, and exchanges heat with the methanol fuel through a heat source on a ship.

Optionally, the system further comprises: a methanol buffer tank; wherein:

the methanol buffer tank is arranged between the filtering device and the methanol booster pump and is used for storing the methanol fuel subjected to heat exchange and filtering;

the methanol booster pump is used for boosting the methanol fuel in the methanol buffer tank again.

Optionally, the system further comprises: a pressure monitoring device; wherein:

the pressure monitoring device is arranged at the outlet end of the methanol booster pump and is used for monitoring the outlet pressure of the methanol booster pump;

and the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank.

According to another aspect of the present invention, there is provided a secondary pressurized methanol supply system comprising: the methanol supply pump, the methanol heat exchanger, the methanol booster pump and the filtering device are sequentially arranged; wherein:

the methanol supply pump pumps and conveys the methanol fuel to the methanol heat exchanger in a pressurizing mode;

the methanol heat exchanger is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the methanol booster pump for boosting the methanol fuel to the pressure required by the methanol consumption device again;

the filtering device is used for filtering the methanol fuel subjected to heat exchange and pressurization to obtain pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

Optionally, the methanol heat exchanger adopts a double-plate heat exchanger or a double-shell heat exchanger, and exchanges heat with the methanol fuel through a heat source on a ship.

Optionally, the system further comprises: a methanol buffer tank; wherein:

the methanol buffer tank is arranged between the methanol heat exchanger and the methanol booster pump and is used for storing the methanol fuel subjected to heat exchange;

the methanol booster pump is used for boosting the methanol fuel in the methanol buffer tank again.

Optionally, the system further comprises: a pressure monitoring device; wherein:

the pressure monitoring device is arranged at the outlet end of the methanol booster pump and is used for monitoring the outlet pressure of the methanol booster pump; or the pressure monitoring device is arranged at the outlet end of the filtering device and is used for monitoring the outlet pressure of the filtering device;

and the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank.

According to a third aspect of the present invention, there is provided a secondary pressurized methanol supply method comprising:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, filtration treatment and repressurization treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

According to a fourth aspect of the present invention, there is provided a secondary pressurized methanol supply method comprising:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, repressurization treatment and filtration treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

Due to the adoption of the technical scheme, compared with the prior art, the invention has at least one of the following beneficial effects:

according to the secondary pressurizing methanol supply system and the secondary pressurizing methanol supply method, the methanol fuel can be stably conveyed from the methanol fuel tank to the methanol pressurizing pump without additionally arranging a daily tank, the daily tank for methanol and a matched conveying unit between the daily tank and a methanol fuel cabin are reduced, the space occupation is reduced, and the equipment cost investment of the methanol system is also reduced.

According to the secondary pressurizing methanol supply system and the secondary pressurizing methanol supply method, the methanol heat exchanger and the filtering device are arranged at the downstream of the supply pump, compared with the mode of arranging the methanol heat exchanger and the filtering device at the downstream of the methanol pressurizing pump, the technical conditions of equipment are effectively reduced, the equipment model selection range is increased, the occupation of the daily tank space is reduced, and the initial cost investment and the maintenance cost of the equipment are reduced.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

fig. 1 is a schematic diagram of a structure of a secondary pressurized methanol supply system according to an embodiment of the invention.

Fig. 2 is a schematic diagram showing the constitution of a secondary pressurized methanol supply system according to a preferred embodiment of the present invention.

Fig. 3 is a schematic diagram showing the composition of a secondary pressurized methanol supply system according to another embodiment of the present invention.

Fig. 4 is a schematic diagram showing the constitution of a secondary pressurized methanol supply system according to another preferred embodiment of the present invention.

In the figure: 1 is a methanol supply pump, 2 is a methanol heat exchanger, 3 is a filtering device, 4 is a methanol booster pump, 5 is a methanol buffer tank, 6 is a pressure monitoring device, 7 is a methanol fuel tank, 8 is a methanol supply pipeline, and 9 is a methanol pipeline for refluxing methanol to the methanol buffer tank.

Detailed Description

The following describes embodiments of the present invention in detail: the embodiment is implemented on the premise of the technical scheme of the invention, and detailed implementation modes and specific operation processes are given. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the invention.

As shown in fig. 1, an embodiment of the present invention provides a secondary pressurized methanol supply system, which may include: a methanol supply pump 1, a methanol heat exchanger 2, a filtering device 3 and a methanol booster pump 4 which are arranged in sequence; wherein:

the methanol supply pump 1 pumps and conveys methanol fuel to the methanol heat exchanger 2 in a pressurizing mode;

the methanol heat exchanger 2 is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the filtering device 3 for filtering;

the methanol booster pump 4 is used for boosting the methanol fuel subjected to heat exchange and filtration to the pressure required by the methanol consumption device again, and then obtaining pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

In a preferred embodiment, the methanol heat exchanger 2 may be a double plate heat exchanger or a double shell heat exchanger, and exchanges heat with the methanol fuel by a heat source on a ship.

As shown in fig. 2, in a preferred embodiment, the system may further comprise: a methanol buffer tank 5; wherein:

the methanol buffer tank 5 is arranged between the filtering device 3 and the methanol booster pump 4 and is used for storing the methanol fuel subjected to heat exchange and filtering;

the methanol booster pump 4 is used for boosting the methanol fuel in the methanol buffer tank 5 again.

As shown in fig. 2, in a preferred embodiment, the system may further comprise: a pressure monitoring device 6; wherein:

the pressure monitoring device 6 is arranged at the outlet end of the methanol booster pump 4 and is used for monitoring the outlet pressure of the methanol booster pump 4;

the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank 5.

The embodiment of the invention also provides a secondary pressurizing methanol supply method, which can comprise the following steps:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, filtration treatment and repressurization treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

It should be noted that, the steps in the method provided by the present invention may be implemented by using corresponding devices, components, etc. in the above system, and those skilled in the art may refer to a technical solution of the system to implement a step flow of the method, that is, an embodiment in the system may be understood as a preferred example of implementing the method, which is not described herein.

As shown in fig. 3, an embodiment of the present invention provides a secondary pressurized methanol supply system, which may include: the methanol heat exchanger comprises a methanol supply pump 1, a methanol heat exchanger 2, a methanol booster pump 4 and a filtering device 3 which are sequentially arranged; wherein:

the methanol supply pump 1 pumps and conveys methanol fuel to the methanol heat exchanger 2 in a pressurizing mode;

the methanol heat exchanger 2 is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the methanol booster pump 4 for boosting the methanol fuel to the pressure required by the methanol consumption device again;

the filtering device 3 is used for filtering the methanol fuel subjected to heat exchange and pressurization to obtain pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

In a preferred embodiment, the methanol heat exchanger 3 may be a double plate heat exchanger or a double shell heat exchanger, and exchanges heat with the methanol fuel by a heat source on a ship.

As shown in fig. 4, in a preferred embodiment, the system may further comprise: a methanol buffer tank 5; wherein:

the methanol buffer tank 5 is arranged between the methanol heat exchanger 2 and the methanol booster pump 4 and is used for storing the methanol fuel subjected to heat exchange;

the methanol booster pump 4 is used for boosting the methanol fuel in the methanol buffer tank 5 again.

As shown in fig. 4, in a preferred embodiment, the system may further comprise: a pressure monitoring device 6; wherein:

the pressure monitoring device 6 is arranged at the outlet end of the methanol booster pump 4 and is used for monitoring the outlet pressure of the methanol booster pump 4; or, the pressure monitoring device 6 is arranged at the outlet end of the filtering device 3 and is used for monitoring the outlet pressure of the filtering device 3;

the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank 5.

The embodiment of the invention also provides a secondary pressurizing methanol supply method, which can comprise the following steps:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, repressurization treatment and filtration treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

It should be noted that, the steps in the method provided by the present invention may be implemented by using corresponding devices, components, etc. in the above system, and those skilled in the art may refer to a technical solution of the system to implement a step flow of the method, that is, an embodiment in the system may be understood as a preferred example of implementing the method, which is not described herein.

The technical scheme provided by the embodiment of the invention is further described below.

The embodiment of the invention provides a secondary pressurizing methanol supply method and a supply method applied to a ship, wherein the system comprises the following steps: the device comprises a methanol supply pump, a methanol heat exchanger, a methanol booster pump, a filtering device, a methanol buffer tank and a pressure monitoring device. The methanol supply pump pumps the methanol fuel into the methanol heat exchanger after pressurizing the methanol fuel tank for the first time, the methanol heat exchanger directly exchanges heat with a heat source on the ship, and an intermediate medium is not used for separating the methanol fuel from the heat source on the ship; the methanol fuel enters the filtering device and the methanol booster pump to be filtered and pressurized respectively after being subjected to heat exchange by the methanol heat exchanger, and the sequence of the filtering and the pressurizing can be exchanged. A pressure monitoring device is arranged on the connected pipeline to monitor and control the pressure of the supplied methanol fuel.

The daily tank for methanol is not arranged between the methanol supply pump or the methanol booster pump and the methanol fuel tank on the ship, and the methanol supply pump directly sucks the methanol from the methanol fuel tank and conveys the methanol to the methanol booster pump.

The methanol heat exchanger is arranged at the upstream of the methanol booster pump, so that the use pressure of the methanol heat exchanger is effectively reduced.

The methanol heat exchanger can be a double-plate heat exchanger or a double-shell heat exchanger, so that a heat source on a ship can directly exchange heat with methanol, and the isolation space of the double-tube or the double-plate can effectively isolate two mediums without allowing leakage mediums to enter the non-leakage mediums.

And 1 methanol buffer tank can be arranged between the methanol supply pump and the methanol booster pump, and the methanol supply pump conveys the methanol to the methanol buffer tank after passing through the methanol heat exchanger or the methanol heat exchanger and the methanol filtering device. The methanol booster pump further boosts the pressure of the methanol from the upstream methanol buffer tank and delivers the methanol to the methanol consuming device.

The downstream of the methanol booster pump is provided with a pressure monitoring device, and methanol which needs to flow back due to pressure control can be returned to the methanol buffer tank.

The filtering device can be arranged at the upstream of the methanol booster pump or at the downstream of the methanol booster pump, and the use pressure of the methanol heat exchanger and the filtering device can be effectively reduced by arranging the filtering device at the upstream of the methanol booster pump. The arrangement of the methanol booster pump downstream can ensure that the methanol is completely filtered and then conveyed to the methanol consumption device.

The methanol fuel subjected to heat exchange and pressurization meets the temperature and pressure requirements of a methanol consumption device, and pure methanol fuel is obtained after filtration and can be used for being supplied to the methanol consumption device for fuel.

As shown in fig. 1, the structure of the secondary pressurizing methanol supply system without a daily tank is shown, wherein methanol fuel is pressurized from a methanol supply pump 1, enters a methanol heat exchanger 2, then enters a filtering device 3 for filtering, then enters a methanol booster pump 4 for pressurizing, and finally enters a methanol consumption device.

As shown in fig. 2, in the structure shown in fig. 1, 1 methanol buffer tank 5 is provided, and methanol is fed to methanol buffer tank 5 by methanol feed pump 1 after passing through methanol heat exchanger 2 and methanol filter 3. The methanol booster pump 4 further boosts the pressure of methanol from the upstream methanol buffer tank 5, and supplies the methanol to the methanol consuming apparatus.

Downstream of the methanol booster pump 4, a pressure monitoring device 6 is provided, and methanol to be refluxed due to pressure control can be returned to the methanol buffer tank 5 via a methanol reflux line 9.

As shown in fig. 3, another structure of the secondary pressurizing methanol supply system without a daily tank is shown, wherein methanol fuel is pressurized from a methanol supply pump 1 and then enters a methanol heat exchanger 2, then enters a methanol pressurizing pump 4 for pressurizing, then enters a filtering device 3 for filtering, and finally enters a methanol consumption device.

As shown in fig. 4, in the structure shown in fig. 3, 1 methanol buffer tank 5 is provided, and methanol fuel is fed by methanol supply pump 1 through methanol heat exchanger 2 and then into methanol buffer tank 5. The methanol booster pump 4 further boosts the pressure of the methanol from the upstream methanol buffer tank 5, and then the methanol is filtered by the methanol filter device 3 and finally is delivered to the methanol consumption device.

The downstream of the methanol booster pump 4 is provided with a pressure monitoring device 6, and methanol which needs to be refluxed due to pressure control can be returned to the methanol buffer tank 5 through a methanol reflux pipeline 9.

In some embodiments of the invention:

the daily tank for methanol is not arranged between the methanol supply pump or the methanol booster pump and the methanol fuel tank on the ship, and the methanol supply pump directly sucks the methanol from the methanol fuel tank and conveys the methanol to the methanol booster pump.

The methanol heat exchanger and the filtering device are arranged at the upstream of the methanol booster pump, so that the use pressure of the methanol heat exchanger and the filtering device is effectively reduced.

The methanol heat exchanger can be a double-plate heat exchanger or a double-shell heat exchanger, so that a heat source on a ship can directly exchange heat with methanol, and the isolation space of the double-tube or the double-plate can effectively isolate two mediums without allowing leakage mediums to enter the non-leakage mediums.

The methanol supply system collects residual methanol liquid from the methanol consumption device by using a small methanol collection tank (methanol buffer tank), realizes purification of the methanol liquid, replaces the methanol collection function in the daily tank, has the advantages of small volume, low cost, easy operation and maintenance and the like, and clean methanol in the methanol collection tank enters the methanol supply system from the inlet of the methanol supply pump for reuse.

According to the secondary pressurizing methanol supply system and the secondary pressurizing methanol supply method provided by the embodiment of the invention, the methanol fuel can be stably conveyed from the methanol fuel tank to the methanol pressurizing pump without arranging an additional daily tank, and the daily tank of the methanol and a matched conveying unit between the daily tank and a methanol fuel cabin are reduced; meanwhile, in the secondary pressurizing methanol supply system and the secondary pressurizing methanol supply method provided by the embodiment of the invention, the methanol heat exchanger and the filtering device are arranged at the downstream of the methanol supply pump, so that compared with the mode of arranging the methanol heat exchanger and the filtering device at the downstream of the methanol booster pump, the technical condition of equipment is effectively reduced, the equipment model selection range is increased, the occupation of the daily tank space is reduced, and the initial cost input and the maintenance cost of the equipment are reduced.

It should be noted that the terms "connected," "configured," and the like herein do not denote or imply a particular orientation, configuration, or operation of the elements or devices to be referred to, but rather are merely descriptive of the requirements. "connected" and the like, as used herein, may mean a direct connection between elements, or other connections may exist between the two.

The foregoing embodiments of the present invention are not all well known in the art.

The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.

Claims (10)

1. A secondary pressurized methanol supply system, comprising: the methanol supply pump, the methanol heat exchanger, the filtering device and the methanol booster pump are sequentially arranged; wherein:

the methanol supply pump pumps and conveys the methanol fuel to the methanol heat exchanger in a pressurizing mode;

the methanol heat exchanger is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the filtering device for filtering;

the methanol booster pump is used for boosting the methanol fuel subjected to heat exchange and filtration to the pressure required by the methanol consumption device again, so as to obtain pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

2. The secondary pressurized methanol supply system of claim 1 wherein the methanol heat exchanger is a double plate heat exchanger or a double shell heat exchanger and exchanges heat with the methanol fuel by a heat source on board a ship.

3. The secondary pressurized methanol supply system according to any one of claims 1-2, further comprising: a methanol buffer tank; wherein:

the methanol buffer tank is arranged between the filtering device and the methanol booster pump and is used for storing the methanol fuel subjected to heat exchange and filtering;

the methanol booster pump is used for boosting the methanol fuel in the methanol buffer tank again.

4. A secondary pressurized methanol supply system as set forth in claim 3 further comprising: a pressure monitoring device; wherein:

the pressure monitoring device is arranged at the outlet end of the methanol booster pump and is used for monitoring the outlet pressure of the methanol booster pump;

and the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank.

5. A secondary pressurized methanol supply system, comprising: the methanol supply pump, the methanol heat exchanger, the methanol booster pump and the filtering device are sequentially arranged; wherein:

the methanol supply pump pumps and conveys the methanol fuel to the methanol heat exchanger in a pressurizing mode;

the methanol heat exchanger is used for exchanging heat of the methanol fuel to the temperature required by the methanol consumption device and then conveying the methanol fuel to the methanol booster pump for boosting the methanol fuel to the pressure required by the methanol consumption device again;

the filtering device is used for filtering the methanol fuel subjected to heat exchange and pressurization to obtain pure methanol fuel meeting the temperature and pressure requirements of the methanol consumption device.

6. The secondary pressurized methanol supply system of claim 5 wherein the methanol heat exchanger is a double plate heat exchanger or a double shell heat exchanger and exchanges heat with the methanol fuel by a heat source on board the vessel.

7. The secondary pressurized methanol supply system according to any one of claims 5 to 6, further comprising: a methanol buffer tank; wherein:

the methanol buffer tank is arranged between the methanol heat exchanger and the methanol booster pump and is used for storing the methanol fuel subjected to heat exchange;

the methanol booster pump is used for boosting the methanol fuel in the methanol buffer tank again.

8. The secondary pressurized methanol supply system as set forth in claim 7 further including: a pressure monitoring device; wherein:

the pressure monitoring device is arranged at the outlet end of the methanol booster pump and is used for monitoring the outlet pressure of the methanol booster pump; or the pressure monitoring device is arranged at the outlet end of the filtering device and is used for monitoring the outlet pressure of the filtering device;

and the methanol fuel which needs to be returned to meet the pressure control requirement is returned to the methanol buffer tank.

9. A secondary pressurized methanol supply method, comprising:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, filtration treatment and repressurization treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

10. A secondary pressurized methanol supply method, comprising:

and (3) obtaining the methanol fuel in a pressurizing mode, and sequentially carrying out heat exchange treatment, repressurization treatment and filtration treatment on the methanol fuel through a supply pipeline to finally obtain the pure methanol fuel meeting the temperature and pressure requirements of a methanol consumption device.

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