CN106482414A - One kind is used for fishing boat power LNG cold energy stair device - Google Patents

Abstract

The invention discloses a LNG cold energy cascade device for fishing boat power, including an LNG tank, a main engine, a heater, a cold energy accumulator and a semiconductor generator, and is characterized in that: the LNG tank, the cold energy accumulator, and the heater , the NG tank and the main engine are connected in sequence through pipelines, wherein: a pressure regulating valve is installed on the pipeline between the LNG tank and the cold energy accumulator, and a gas supply valve is installed on the pipeline between the NG tank and the main engine; The cold energy accumulator is sequentially connected to the cold storage pump and the fluidized ice maker to form a closed circulation pipeline; a branch pipeline one is also installed on the pipeline between the LNG tank and the cold energy accumulator; Beneficial effects of the present invention: the main engine of the fishing boat burns NG instead of diesel to reduce marine environmental pollution, LNG heats up the main engine of the fishing boat and uses the released cold energy to collect and utilize it to make fluidized ice. The use of fishing boats solves the problem of keeping seafood fresh and solving the problem of ice on current fishing boats. The operation is inconvenient, and the utilization rate of energy is improved, which is suitable for popularization and use.

Description

A cascade device for LNG cold energy for fishing boat power

technical field

The invention relates to the technical field of ship power, in particular to an LNG cold energy cascade device used for power of fishing boats.

Background technique

LNG (Liquefied Natural Gas), the English abbreviation for liquefied natural gas. Natural gas is a combustible gas that is naturally extracted from gas fields and is mainly composed of methane. LNG is condensed into a liquid by cooling gaseous natural gas at normal pressure to -162°C. Natural gas liquefaction can greatly save storage and transportation space, and has the characteristics of large calorific value and high performance.

LNG is a clean and efficient energy source. Importing LNG helps energy consuming countries diversify energy supply and ensure energy security, while exporting LNG helps natural gas producing countries effectively develop natural gas resources, increase foreign exchange income, and promote national economic development, so LNG trade is becoming a global energy market. new hotspot.

Natural gas is becoming more and more popular as a clean energy source. Many countries have listed LNG as the preferred fuel, and the proportion of natural gas in energy supply has increased rapidly. Liquefied natural gas is growing at a high rate of about 12% per year, making it one of the fastest growing energy industries in the world. In recent years, global LNG production and trade have become increasingly active. LNG has become a scarce and clean resource and is becoming a new hot spot in the world's oil and gas industry. In order to ensure the diversification of energy supply and improve the energy consumption structure, some major energy consuming countries are paying more and more attention to the introduction of LNG. Japan, South Korea, the United States, and Europe are all building large-scale LNG receiving stations. Major international oil companies have also shifted their new profit growth point to LNG business, and LNG will become the next hot energy commodity in the world after oil.

The notification number CN104806877A discloses a marine LNG forced evaporator, which belongs to the field of natural gas gasification devices. Including the tank body of the gasification tank, the left end of the tank body is provided with the left end cover of the tank body, the cover is fixed on the left end cover interface of the tank body, the left port of the interface is fixed on the left end cover interface sealing plate, the right end is provided with the right end cover of the tank body, and the right end cover interface of the tank body is fixed on the cover, The right port of the interface is fixed to the sealing plate of the right end cover interface, the upper part of the gasification tank body is provided with an intermediate medium inlet interface, and the bottom is provided with an intermediate medium outlet interface; a set of U-shaped heat dissipation pipes is located in the tank cavity; a set of U-shaped gasification The tube is set in the tank cavity; the heat dissipation medium guide joint is fixed on one side of the sealing plate at the interface between the right end and the left end cover, and the heat dissipation medium guide joint cavity partition plate is arranged in the cavity, the upper part is fixed with the heat dissipation medium introduction interface, and the lower part is fixed with the heat dissipation medium outlet interface ; The gas-liquid guide joint, the cavity is provided with a gas-liquid guide partition plate, a lower fixed LNG inlet port, and an upper fixed gasified natural gas outlet port. Embodies safety; improves heat dissipation and gasification efficiency; facilitates processing.

With the successive implementation of IMO Tier II and Tier III emission standards, the control of exhaust emissions from marine diesel engines has become more stringent. In addition to measures such as exhaust gas recirculation, fuel oil mixed with water, use of fuel additives, fuel desulfurization treatment, and exhaust water spray purification, etc. In addition to meeting the standards for ship exhaust emissions, LNG, as a clean energy source, has attracted more and more attention from the industry.

LNG cold energy can be applied on fishing boats and ships, such as thermal power generation, ship refrigeration, seawater desalination, ship air conditioning system, engine and equipment cooling, etc.

At present, the emergence and rapid development of a new type of ice-fluid ice has brought new impacts to the preservation of aquatic products. Fluid ice is a popular research object that countries all over the world are vigorously researching and developing. The solid-liquid two-phase solution of particles is simply a mixture of ice and water. According to relevant research, under the same conditions, the cooling capacity of fluidized ice is about 5 times that of ordinary ice, and its heat supply coefficient can be increased by about 50%. Because it is an ice crystal particle, the particle is small and uniform, and can flow, so it can quickly wrap the outer surface of the object and make close contact, so it has the characteristics of rapid cooling. At the same time, it can ensure that the surface of the object to be cooled is not damaged. It prevents the growth of internal bacteria and the entry of external bacteria, ensuring the fresh quality of seafood. At present, it has been widely used in agricultural product preservation, seafood preservation, ice storage air conditioning, mine cooling, etc. Fluid ice can be obtained locally at sea, directly produced, and can be used for pre-cooling and fresh-keeping of seafood. For offshore fishing boats, the single fishing period is 20-30 days. Such fishing boats do not have refrigeration systems, and currently they mainly operate with ice. For the preservation of aquatic products on fishing boats, traditional ice cubes have obvious disadvantages. In contrast, fluidized ice has the advantages of round ice crystals without damaging the surface of aquatic products, small diameter, good sealing effect, fast cooling speed and long fresh-keeping period. Fluid ice technology is a refrigeration and fresh-keeping technology with great potential at present, and its development prospect is very broad.

Contents of the invention

Aiming at the shortcomings of the prior art, the present invention proposes a cascade device for powering LNG cold energy for fishing boats. The device utilizes LNG to heat the main engine of the fishing boat and use the cold energy of LNG to collect and utilize it to produce fluidized ice for fishing boats. Improve the utilization rate of energy.

Concrete technical scheme of the present invention is as follows:

A kind of LNG cold energy cascade device for fishing boat power, including LNG tank, main engine, heater, cold energy accumulator and semiconductor generator, is characterized in that: described LNG tank, cold energy accumulator, heater, NG tank and The hosts are connected sequentially through pipelines, wherein: a pressure regulating valve is installed on the pipeline between the LNG tank and the cold energy accumulator, and a gas supply valve is installed on the pipeline between the NG tank and the host; the cold energy storage A closed circulation pipeline is formed by sequential connection between the load-bearing cold pump and the fluidized ice maker; a branch pipeline 1 is also installed on the pipeline between the LNG tank and the cold energy accumulator, and the branch pipeline Valves and semiconductor generators are installed on the road;

A pipeline is connected between the semiconductor generator and the heater, and a pipeline is connected between the heater and the host.

Preferably, a heat supply pipeline is connected between the host and the semiconductor generator, and a water pump is installed on the heat supply pipeline connected between the host and the semiconductor generator. A branch pipeline 2 is also connected to the pipeline between the water pump, the semiconductor generator and the heater.

Beneficial effects of the present invention: LNG is used to heat the main engine of the fishing boat and use the cold energy of LNG to collect and utilize it to produce fluidized ice for fishing boats, which improves the utilization rate of energy and is suitable for popularization and use.

Description of drawings

Fig. 1 is a structural layout diagram of the LNG cold energy cascade device used for fishing boat power according to the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in the figure, a LNG cold energy cascade device for fishing boat power includes an LNG tank 1, a main engine 4, a heater 6, a cold energy accumulator 7 and a semiconductor generator 12, the LNG tank 1, the cold energy accumulator 7. The heater 6, the NG tank 5 and the main engine 4 are connected sequentially through pipelines, wherein: a pressure regulating valve 11 is installed on the pipeline between the LNG tank 1 and the cold energy accumulator 7, and the NG tank 5 and the main engine 4 An air supply valve 3 is installed on the pipeline between them; the cold energy accumulator 7 is sequentially connected with the charge cold pump 9 and the fluidized ice maker 8 to form a closed circulation pipeline; the LNG tank 1 and A branch pipeline one is also installed on the pipeline between the cold energy regenerators 7, and a valve 10 and a semiconductor generator 12 are installed on the branch pipeline one;

A pipeline is connected between the semiconductor generator 12 and the heater 6 , and a pipeline is connected between the heater 6 and the host 4 .

A heat supply pipeline is connected between the host 4 and the semiconductor generator 12 , and a water pump 2 is installed on the heat supply pipeline connected between the host 4 and the semiconductor generator 12 . The pipeline between the water pump 2 and the semiconductor generator 12 and the heater 6 is also connected with a branch pipeline two.

The working principle of the present invention is as follows:

First, the liquefied natural gas in the LNG tank 1 is regulated by the pressure regulating valve 11 and then enters the cold energy accumulator 7 through the pipeline. The cold energy accumulator 7 absorbs the cold energy released by the liquefied natural gas and sends the cold energy to into the fluidized ice maker 8 to produce fluidized ice for use by fishing boats, and at the same time, the cold energy accumulator 7 is connected in sequence with the charge cold pump 9 and the fluidized ice maker 8 to form a closed circulation pipeline, so The cold energy is continuously circulated between the circulating pipelines for the use of the fluidized ice maker 8 .

After the liquefied natural gas passes through the cold energy accumulator 7, it enters the heater for heating and heats up to the temperature required by the host (20-30°C). Work, also can directly send into main frame 4 to work after heater heating.

In addition, a valve 10 and a semiconductor generator 12 are installed on the branch pipeline, and the liquefied natural gas output from the LNG tank 1 can also be heated by the semiconductor generator 12 by opening the valve 10, and then sent to the heater 6 for heating and heating to the needs of the host. Temperature (20～30 ℃) can be sent into NG tank 5 after storage and then open air supply valve 4 to supply air to the main engine, so that the main engine 4 works, and can also be directly sent to the main engine 4 to work after the heater is heated.

In addition, when the semiconductor generator 12 is not working, the host 4 can also send the hot water of the host 4 through the branch pipeline 2 to the heater 6 through the water pump 2 to heat up to the required temperature of the host (20-30°C). After being sent to the NG tank 5 for storage, the gas supply valve 4 can be opened to supply air to the main engine to make the main engine 4 work, and it can also be directly sent to the main engine 4 to work after being heated by the heater 6.

In addition to the above-mentioned embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (3)

1. a kind of for fishing boat power LNG cold energy stair device, including LNG tank (1), main frame (4), heater (6), cold energy cold-storage Device (7) and semiconductor generator (12), it is characterised in that：LNG tank (1), cold energy regenerator (7), heater (6), NG tank (5) it is sequentially connected with by pipeline and main frame (4) between, wherein：Install on pipeline between LNG tank (1) and cold energy regenerator (7) There is pressure regulator valve (11), steam supply valve (3) is installed on the pipeline between NG tank (5) and main frame (4)；Cold energy regenerator (7) with It is sequentially connected with, between refrigerating pump (9) and fluidization ice-making device (8), the circulation line to form closing；LNG tank (1) is stored with cold energy Branch line one is also equipped with pipeline between cooler (7), and valve (10) and semiconductor are installed on the branch line one Electric organ (12)；

Pipeline is connected between semiconductor generator (12) and heater (6), is connected between heater (6) and main frame (4) There is pipeline.

2. fishing boat power LNG cold energy stair device is used for according to claim 1, it is characterised in that：Main frame (4) and half Conductor electric organ is connected with heat supplying pipeline between (12), is connected with heat supply between main frame (4) and semiconductor generator (12) Water pump (2) is installed on pipeline.

3. fishing boat power LNG cold energy stair device is used for according to claim 2, it is characterised in that：Water pump (2) and half Branch line two is also associated with pipeline between conductor electric organ (12) and heater (6).