CN113498756B - Recirculating aquaculture cooling system based on LNG cold energy utilization - Google Patents
Recirculating aquaculture cooling system based on LNG cold energy utilization Download PDFInfo
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- 238000009360 aquaculture Methods 0.000 title claims abstract description 70
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- 238000002485 combustion reaction Methods 0.000 claims description 23
- 239000013505 freshwater Substances 0.000 claims description 22
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/06—Arrangements for heating or lighting in, or attached to, receptacles for live fish
- A01K63/065—Heating or cooling devices
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
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- Life Sciences & Earth Sciences (AREA)
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- Marine Sciences & Fisheries (AREA)
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Abstract
The application discloses recirculating aquaculture cooling system based on LNG cold energy utilizes includes: LNG liquid storage pot, LNG gasification system, cold-storage device and circulation breed water processing system, LNG gasification system is including opening posture vaporizer, submergence burning formula vaporizer and air temperature formula vaporizer, the LNG liquid storage pot respectively with submergence burning formula vaporizer, it is connected to open posture vaporizer and cold-storage device, the first liquid outlet of opening posture vaporizer and the first liquid outlet of cold-storage device all are connected with the inlet of air temperature formula vaporizer, the gas outlet of air temperature formula vaporizer and the gas outlet of submergence burning formula vaporizer all are connected with city user's gas-supply pipe, it all is connected with circulation breed water processing system to open posture vaporizer and cold-storage device. The invention comprehensively utilizes a large amount of cold energy generated by LNG gasification to regulate and control the temperature of the aquaculture water body, thereby achieving the purpose of reducing the cooling energy consumption and the operation cost of the aquaculture water body and simultaneously not influencing the gas requirement of natural gas users.
Description
Technical Field
The application relates to the technical field of aquaculture water cooling systems, in particular to a recirculating aquaculture cooling system based on LNG cold energy utilization.
Background
LNG is prepared by cryogenic cooling of natural gas to-162 ℃ at normal pressure for convenient transportation, and is gasified into normal-temperature gaseous natural gas by heat exchange before being used as an industrial raw material or fuel, so that the LNG has a large amount of low-temperature energy. A large amount of LNG is imported in China, a large amount of LNG receiving stations are established in coastal provinces and cities, most of LNG is exchanged heat through a seawater Open Rack Vaporizer (ORV), seawater is used as an LNG gasification heat source at present, but the main treatment means of the seawater after heat exchange with the LNG is only to perform harmless treatment and then discharge the seawater back to the sea, so that a large amount of cold energy is wasted. By the end of 2019, the annual processing capacity of the LNG receiving station in China reaches 7742 ten thousand tons. Through measurement and calculation, the cold energy value of each 3000 million tons of LNG is equal to about 99 hundred million kWh/year of electric power, which is equivalent to saving 380 million tons of standard coal and reducing 880 million tons of carbon dioxide emission. Therefore, the LNG cold energy is fully utilized, and the method has great significance for saving energy and reducing carbon dioxide emission.
The variety of the cold water edible seawater fishes appears in the market, such as salmon, rainbow trout, sturgeon and the like, and the cold water edible seawater fishes have the characteristics of delicious taste, compact meat quality, no fishy smell, small bone spurs, rich nutrition and the like, so the cold water edible seawater fishes have high economic value. Most of the cold water edible seawater fish on the current market are caught by the traditional method. The traditional fishery currently faces a plurality of difficulties: the fishing cost is increased day by day when going out of the sea, the fishing risk is higher, and the marine ecological environment is damaged due to the restriction of season time.
At present, the recirculating aquaculture industry in China enters a rapid development stage, the recirculating aquaculture is generally concerned by production enterprises, and due to the characteristics of less pollution, controllable aquaculture environment, sanitation guarantee of aquatic products and capability of overcoming of environmental factors such as space, time and the like, the industrial recirculating aquaculture is highly valued by people in all the aquaculture fields and is supported by governments. In a recirculating aquaculture system, the water temperature is a very important water quality parameter for water system organisms, and can directly influence the physiological behaviors of aquatic organisms such as fishes, shrimps and the like and also indirectly influence other water quality parameters in the same environment. In the aspect of operation economy, energy consumption is high in water temperature regulation, the operation cost is increased, and the economic burden of enterprises is increased. Therefore, the design effect of the water temperature regulation and control system can finally seriously affect the culture yield, the quality of aquatic products and the total income of enterprises. Most of circulating aquaculture systems in China adopt a mode of consuming electric energy or fuel to control the temperature of the water in the aquaculture pond, so that the system is not energy-saving, and has the characteristic of higher energy consumption generally, the temperature of the water in the aquaculture pond is controlled in a consumption and fuel efficiency mode, and certain influence is further caused on the surrounding environment, the excessive waste of energy can also cause the increase of the aquaculture cost of aquaculture enterprises, the burden of the enterprises is increased, and the problem of large energy consumption in the aquaculture water temperature regulation and control link becomes a bottleneck restricting the development of industrialized circulating aquaculture. Therefore, the invention provides a recirculating aquaculture cooling system based on LNG cold energy utilization.
Disclosure of Invention
The embodiment of the application provides a recirculating aquaculture cooling system based on LNG cold energy utilizes for can utilize the temperature of LNG energy control aquaculture water body, thereby reach the purpose that reduces the energy loss of regulation and control aquaculture water body.
In view of this, this application provides a recirculating aquaculture cooling system based on LNG cold energy utilizes, includes: the system comprises an LNG liquid storage tank, an LNG gasification system, a cold accumulation device and a circulating culture water treatment system;
the LNG gasification system comprises an open rack vaporizer, a submerged combustion vaporizer and an air temperature vaporizer;
a liquid outlet of the LNG liquid storage tank is respectively connected with a liquid inlet of the submerged combustion type gasifier, a first liquid inlet of the open rack type gasifier and a first liquid inlet of the cold accumulation device;
the first liquid outlet of the open rack vaporizer and the first liquid outlet of the cold accumulation device are both connected with the liquid inlet of the air-temperature vaporizer;
the air outlet of the air-temperature gasifier and the air outlet of the submerged combustion gasifier are both connected with an urban user gas pipe;
the second liquid outlet of the open rack type gasifier and the second liquid outlet of the cold accumulation device are both connected with the circulating aquaculture water treatment system;
the circulating culture water treatment system is respectively connected with the second liquid inlet of the open rack type gasifier and the second liquid inlet of the cold accumulation device.
Optionally, the circulating aquaculture water treatment system comprises a temperature regulation pool, an aquaculture pool, a water treatment device, a first circulating water pump and a second circulating water pump;
the second liquid outlet of the open rack vaporizer and the second liquid outlet of the cold accumulation device are connected with the water inlet of the temperature regulating pool through a water inlet pipe;
the water outlet of the water treatment device is respectively connected with the second liquid inlet of the open rack vaporizer and the second liquid inlet of the cold accumulation device through a water outlet pipe;
the water outlet of the temperature regulating pool is connected with the water inlet of the first circulating water pump;
the water outlet of the first circulating water pump is respectively connected with the water inlet of the culture pond and the water outlet pipe through a water separator;
the water outlet of the culture pond is connected with the water inlet of the second circulating water pump through a water collector;
the water outlet of the second circulating water pump is connected with the water inlet of the water treatment device;
the waste discharge port of the water treatment device is connected with the outside.
Optionally, the second liquid outlet of the open-rack vaporizer and the second liquid outlet of the cold storage device are connected to the water inlet pipe through a three-way flow control valve.
Optionally, the method further comprises: a first fresh water supply pipe;
a liquid level control valve is arranged in the temperature regulating tank;
the first fresh water supply pipe is connected with the liquid level control valve.
Optionally, a fresh water supply port is arranged on the water outlet pipe;
and the water outlet pipe is connected with a second fresh water supply pipe through the fresh water supply port.
Optionally, a water outlet for discharging the excessive water is arranged on the water inlet pipe.
Optionally, the fresh water supply port, the outlet port, the liquid inlet of the submerged combustion type vaporizer, the water separator and between the water outlet pipes, the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the open rack type vaporizer and the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the cold accumulation device are all provided with regulating valves for controlling water flow.
Optionally, the liquid outlet of the LNG liquid storage tank, the gas outlet of the submerged combustion vaporizer, the gas outlet of the air-temperature vaporizer, the second liquid outlet of the open-frame vaporizer, and the second liquid outlet of the cold storage device are all provided with check valves.
Optionally, the method further comprises: a temperature monitoring device;
the temperature monitoring device comprises a temperature controller and a temperature sensor electrically connected with the temperature controller;
the temperature controller is arranged in the temperature adjusting pool;
the temperature sensors are respectively arranged at the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the open rack type gasifier, and the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the cold accumulation device.
Optionally, an automatic air release valve is arranged at the top of the temperature regulating pool.
According to the technical scheme, the embodiment of the application has the following advantages: this recirculating water aquaculture cooling system has comprehensively utilized and has reduced aquaculture water temperature through LNG cold energy indirect heat transfer and LNG cold energy and refrigerant heat transfer cold-storage dual mode and aquaculture water heat transfer, and through the nimble allotment series-parallel connection use of dual mode, the power consumption of the consumer that has significantly reduced can satisfy daily user's NG with tolerance demand, has also reached the purpose of aquaculture water temperature regulation and control.
Drawings
FIG. 1 is a schematic structural diagram of a recirculating aquaculture cooling system based on LNG cold energy utilization in an embodiment of the present application;
wherein the reference numerals are:
the system comprises a Liquefied Natural Gas (LNG) storage tank, a 2-submerged combustion type gasifier, a 3-open rack type gasifier, a 4-cold accumulation device, a 5-air temperature type gasifier, a 6-temperature regulating tank, a 7-first circulating water pump, a 8-water separator, a 9-culture tank, a 10-water collector, a 11-second circulating water pump, a 12-water treatment device, a 13-liquid level control valve, a 14-automatic air release valve, a 15-temperature controller, a 16-regulating valve, a 17-check valve and a 18-temperature sensor.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The inventor finds that: large LNG receiving stations are all built in coastal areas, and site selection of the cold water fish recirculating aquaculture industry can be facilitated. The LNG cold energy is used for a water body cooling link in the circulating water culture based on respective advantages of the LNG cold energy, cold water sea fish and the circulating water culture and respective predicaments and elbows faced by the LNG cold energy, so that the purpose of utilizing the LNG cold energy can be fulfilled, the economic operation cost in the circulating water culture is reduced, and the national policy and policy guidelines on energy conservation and emission reduction are realized.
The application provides an embodiment of recirculating aquaculture cooling system based on LNG cold energy utilization, please refer to fig. 1 specifically.
Circulating water culture cooling system based on LNG cold energy utilization in this embodiment includes: the LNG storage tank 1, the LNG gasification system, the cold-storage device 4 and the circulating aquaculture water treatment system, the LNG gasification system comprises an open-frame type gasifier 3, an immersed combustion type gasifier 2 and an air-temperature type gasifier 5, a liquid outlet of the LNG storage tank 1 is respectively connected with a liquid inlet of the immersed combustion type gasifier 2, a first liquid inlet of the open-frame type gasifier 3 and a first liquid inlet of the cold-storage device 4, a first liquid outlet of the open-frame type gasifier 3 and a first liquid outlet of the cold-storage device 4 are respectively connected with a liquid inlet of the air-temperature type gasifier 5, a gas outlet of the air-temperature type gasifier 5 and a gas outlet of the immersed combustion type gasifier 2 are respectively connected with a gas pipe of an urban user, a second liquid outlet of the open-frame type gasifier 3 and a second liquid outlet of the cold-storage device 4 are respectively connected with the circulating aquaculture water treatment system, and the circulating aquaculture water treatment system is respectively connected with a second liquid inlet of the open-frame type gasifier 3 and a second liquid inlet of the cold-storage device 4.
It should be noted that: the open frame vaporizer 3 is a device which can vaporize LNG liquid into gas, exchange heat between a large amount of cold energy generated during vaporization and a heat source for utilization, and simultaneously deliver the vaporized gas to a user for daily use; the cold accumulation device 4 is a device which utilizes a cold source (LNG) to solidify a refrigerant in the cold accumulation device, utilizes phase change cold accumulation to store energy, and then utilizes the refrigerant to cool a heat source (aquaculture water body), can stagger power utilization peak periods, and improves the utilization rate of resources. This recirculating water aquaculture cooling system has comprehensively utilized and has reduced aquaculture water temperature through LNG cold energy indirect heat transfer and LNG cold energy and refrigerant heat transfer cold-storage dual mode and aquaculture water heat transfer, and through the nimble allotment series-parallel connection use of dual mode, the power consumption of the consumer that has significantly reduced can satisfy daily user's NG with tolerance demand, has also reached the purpose of aquaculture water temperature regulation and control.
The above is an embodiment one of a recirculating aquaculture cooling system based on LNG cold energy utilization provided in an embodiment of the present application, and the following is an embodiment two of a recirculating aquaculture cooling system based on LNG cold energy utilization provided in an embodiment of the present application, specifically referring to fig. 1.
Circulating water culture cooling system based on LNG cold energy utilization in this embodiment includes: the LNG storage tank 1, the LNG gasification system, the cold-storage device 4 and the circulating aquaculture water treatment system, the LNG gasification system comprises an open-frame type gasifier 3, an immersed combustion type gasifier 2 and an air-temperature type gasifier 5, a liquid outlet of the LNG storage tank 1 is respectively connected with a liquid inlet of the immersed combustion type gasifier 2, a first liquid inlet of the open-frame type gasifier 3 and a first liquid inlet of the cold-storage device 4, a first liquid outlet of the open-frame type gasifier 3 and a first liquid outlet of the cold-storage device 4 are respectively connected with a liquid inlet of the air-temperature type gasifier 5, a gas outlet of the air-temperature type gasifier 5 and a gas outlet of the immersed combustion type gasifier 2 are respectively connected with a gas pipe of an urban user, a second liquid outlet of the open-frame type gasifier 3 and a second liquid outlet of the cold-storage device 4 are respectively connected with the circulating aquaculture water treatment system, and the circulating aquaculture water treatment system is respectively connected with a second liquid inlet of the open-frame type gasifier 3 and a second liquid inlet of the cold-storage device 4.
It should be noted that: the submerged combustion type gasifier 2, the open rack type gasifier 3, the air temperature type gasifier 5, the cold storage device 4 and other parts in the embodiment of the application are all conventional existing parts. The submerged combustion type gasifier 2 is used for directly combusting high-temperature flue gas generated by LNG and discharging the high-temperature flue gas to an internal water body, the flue gas is vigorously stirred in water, at the moment, hot water can exchange heat with the LNG in the pipe to gasify the LNG, and the heat exchange efficiency is very high; the open-frame vaporizer 3 gasifies LNG by utilizing the circulating temperature difference of the aquaculture water body, so that the temperature of the aquaculture water body is reduced, energy consumption is saved compared with the gasification by using a heater, and gasified natural gas can be supplied to urban users; the air-temperature type vaporizer 5 is a device for cooling heat source passing through the inside thereof with air; the cold accumulation device 4 is a heat exchanger containing a refrigerant, the principle is that LNG cold energy and the refrigerant are utilized to exchange heat at night, the refrigerant is subjected to phase change and icing for storing energy, the stored energy refrigerant releases energy to exchange heat with the aquaculture water body when needed in daytime, the temperature of the aquaculture water body is reduced, the power consumption peak is staggered, the pressure of a power grid is reduced, and the electric energy is saved.
The circulating aquaculture water treatment system comprises a temperature regulating pond 6, an aquaculture pond 9, a water treatment device 12, a first circulating water pump 7 and a second circulating water pump 11, wherein a second liquid outlet of the open rack type gasifier 3 and a second liquid outlet of the cold accumulation device 4 are connected with a water inlet of the temperature regulating pond 6 through water inlet pipes, a water outlet of the water treatment device 12 is respectively connected with a second liquid inlet of the open rack type gasifier 3 and a second liquid inlet of the cold accumulation device 4 through water outlet pipes, a water outlet of the temperature regulating pond 6 is connected with a water inlet of the first circulating water pump 7, a water outlet of the first circulating water pump 7 is respectively connected with a water inlet and a water outlet of the aquaculture pond 9 through a water distributor 8, a water outlet of the aquaculture pond 9 is connected with a water inlet of the second circulating water pump 11 through a water collector 10, a water outlet of the second circulating water pump 11 is connected with a water inlet of the water treatment device 12, and a waste discharge port of the water treatment device 12 is connected with the outside and used for discharging treated wastewater. Specifically, a water outlet of the first circulating water pump 7 is connected with a water inlet of the water separator 8, a first water outlet of the water separator 8 is connected with a water inlet of the culture pond 9, a second water outlet of the water separator 8 is connected with a water outlet pipe, a water outlet of the culture pond 9 is connected with a water inlet of the water collector 10, and a water outlet of the water collector 10 is connected with a water inlet of the second circulating water pump 11.
The second liquid outlet of the open frame type gasifier 3 and the second liquid outlet of the cold accumulation device 4 are connected with the water inlet pipe through a three-way flow control valve.
Further comprising: the first fresh water supply pipe is connected with the liquid level control valve 13, and the liquid level control valve 13 is arranged in the temperature adjusting pool 6. The water outlet pipe is provided with a fresh water supply port and is connected with a second fresh water supply pipe through the fresh water supply port. The water inlet pipe is provided with a water outlet for discharging the excessive water.
It should be noted that: the first fresh water supply pipe and the second fresh water supply pipe can be the same pipeline or different pipelines, and are used for supplying fresh water to the aquaculture water body.
Fresh water supply port, outlet, between inlet of submergence burning formula vaporizer 2, water knockout drum 8 and the outlet pipe, the first inlet of open frame vaporizer 3, second inlet, first liquid outlet and second liquid outlet and the first inlet of cold-storage device 4, second inlet, first liquid outlet and second liquid outlet all are provided with the governing valve 16 that is used for controlling discharge, and is specific, governing valve 16 can be the floodgate valve.
The liquid outlet of the LNG liquid storage tank 1, the gas outlet of the submerged combustion type gasifier 2, the gas outlet of the air temperature type gasifier 5, the second liquid outlet of the open rack type gasifier 3 and the second liquid outlet of the cold accumulation device 4 are all provided with check valves 17.
Further comprising: the temperature monitoring device comprises a temperature controller 15 and a temperature sensor 18 electrically connected with the temperature controller 15, the temperature controller 15 is arranged in the temperature adjusting pool 6, and the temperature sensor 18 is respectively arranged at a first liquid inlet, a second liquid inlet, a first liquid outlet and a second liquid outlet of the open rack type gasifier 3 and a first liquid inlet, a second liquid inlet, a first liquid outlet and a second liquid outlet of the cold accumulation device 4.
The top of the temperature adjusting pool 6 is provided with an automatic air release valve 14.
It should be noted that: in order to facilitate the regulation and control of the temperature of the aquaculture water body through a manual work or a control system, the system further comprises a check valve 17, a regulating valve 16, a temperature controller 15, an automatic air release valve 14, a liquid level control valve 13 and a temperature sensor 18. Specifically, a liquid level control valve 13, an automatic air release valve 14 and a temperature controller 15 are arranged in the temperature adjusting pool 6, the liquid level control valve 13 is used for connecting external new water, a certain amount of new water is introduced to be mixed with the cooled aquaculture water body, the requirement of the aquaculture pool 9 on the water consumption for cooling is met, the automatic air release valve 14 is used for meeting the air pressure inside the temperature adjusting pool 6 and playing a buffering effect, the water hammer effect is reduced, the temperature of the water body inside the temperature adjusting pool 6 is controlled by the temperature controller 15, and the requirement of the aquaculture water body of the aquaculture pool 9 is met; a regulating valve 16 is arranged on a bypass pipeline between a second water outlet of the water separator 8 and a water outlet pipe, so that redundant water in the temperature regulating pool 6 flows to the heat exchanger for heat exchange, the water quantity in the temperature regulating pool 6 is reduced, and the water consumption requirement of the culture pool 9 is met; the inlet and outlet of the open rack type gasifier 3 and the cold accumulation device 4 are respectively provided with an adjusting valve 16 and a temperature sensor 18, the outlet of the open rack type gasifier 3 and the outlet of the cold accumulation device 4 are respectively provided with a check valve 17, the opening and closing degree of the valves is manually or automatically controlled, so that the flow rate in the pipe meets the requirement, the temperature sensor 18 is used for detecting the water inlet temperature and the water outlet temperature of an external water source, so that the temperature regulating pool 6 can better regulate and control the water temperature by inputting new water, more preferably, the open rack type gasifier 3 and the cold accumulation device 4 can be provided with the temperature sensors 18 for detecting the liquid at the inlet and the outlet, and the gas after gasification is prevented from flowing back to the inside of the gasifier by the check function of the check valves 17; an inlet of the submerged combustion gasifier 2 is provided with a regulating valve 16, an outlet is provided with a check valve 17, the flow of inlet liquid is controlled by the regulating valve 16 under the control of manual work or a starting control system, and gasified gas is prevented from flowing back to the inside of the gasifier by the non-return function of the check valve 17.
It can be understood that: the temperature regulation and control of the culture water body can be manual regulation and control, the manual regulation and control is that the temperature of the culture water body is measured manually, and the open-frame gasifier 3 and the cold accumulation device 4 are regulated and controlled manually to be used in a single open mode or a double open mode, or a hose is externally communicated to add new water into the culture pond 9, so that the temperature measurement of the culture water body is regulated and controlled manually; or the system can be controlled by an automatic control system, the automatic control system is similar to the conventional regulation and control system, temperature information is returned by using a temperature sensor 18, the opening and closing of a valve are controlled by a temperature controller 15 monitoring system, the introduction amount of new water is controlled by a liquid level control valve 13, and the temperature of the culture water reaches a set value through calculation. The circulating water culture cooling system controls the size of culture water flow by controlling the opening and closing degree of the valve and the starting and stopping of the first circulating water pump 7 and the second circulating water pump 11 through a manual or automatic control system, so that the temperature of the water body in the temperature adjusting pond 6 can meet the requirement of culture conditions.
During specific implementation, the temperature of the culture water in the temperature adjusting tank 6 is detected firstly, when the temperature reaches a set temperature, the first circulating water pump 7 is started, the culture water meeting the requirements is conveyed into each culture tank 9 through the water distribution function of the water distributor 8, then the culture water is collected and conveyed into the water treatment device 12 through the water collection function of the water collector 10 by utilizing the second circulating water pump 11, the generated wastewater is directly discharged, the treated culture water is mixed with fresh water supply water and is respectively conveyed to the second liquid inlet of the cold accumulation device 4 and the second liquid inlet of the open-shelf gasifier 3 to exchange heat with LNG liquid conveyed from the LNG liquid storage tank 1 in the open-shelf gasifier 3 and the cold accumulation device 4; because the NG temperature passing through the cold accumulation device 4 and the open rack vaporizer 3 is too low, the cold accumulation device can continuously pass through the air temperature vaporizer 5, the NG temperature is increased, and the cold accumulation device can be directly supplied to urban users for direct daily use. Meanwhile, after the temperature of the culture water passing through the cold accumulation device 4 and the open rack type gasifier 3 is reduced, the culture water is input into the temperature adjusting pool 6 to be mixed with the fresh water supply water to adjust the temperature to the set temperature, and then the culture water is sent into the culture pool 9; when the water amount in the temperature adjusting pool 6 is excessive, the excessive water amount is discharged from the second water outlet of the water separator 8 to the water outlet pipe behind the water treatment device 12, the water temperature heat exchange is carried out, and meanwhile, the temperature and the water amount of the water body in the temperature adjusting pool 6 reach set values. The temperature of the aquaculture water body can be continuously regulated and controlled by continuously repeating the steps. In order to meet the sudden and sharp increase of the gas consumption of the NG of the urban users, the submerged combustion type gasifier 2 is configured, and the LNG liquid from the LNG liquid storage tank 1 flows into the submerged combustion type gasifier 2, is gasified into the NG and is input into the gas transmission pipe of the urban users.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. The utility model provides a recirculating water aquaculture cooling system based on LNG cold energy utilizes which characterized in that includes: the system comprises an LNG liquid storage tank, an LNG gasification system, a cold accumulation device and a circulating culture water treatment system;
the cold accumulation device is a heat exchanger containing a refrigerant;
the LNG gasification system comprises an open rack vaporizer, a submerged combustion vaporizer and an air temperature vaporizer;
a liquid outlet of the LNG liquid storage tank is respectively connected with a liquid inlet of the submerged combustion type gasifier, a first liquid inlet of the open rack type gasifier and a first liquid inlet of the cold accumulation device;
the first liquid outlet of the open rack vaporizer and the first liquid outlet of the cold accumulation device are both connected with the liquid inlet of the air-temperature vaporizer;
the air outlet of the air-temperature gasifier and the air outlet of the submerged combustion gasifier are both connected with an urban user gas pipe;
the second liquid outlet of the open rack type gasifier and the second liquid outlet of the cold accumulation device are both connected with the circulating aquaculture water treatment system;
the circulating culture water treatment system is respectively connected with the second liquid inlet of the open rack type gasifier and the second liquid inlet of the cold accumulation device.
2. The LNG cold energy utilization-based recirculating aquaculture cooling system of claim 1, wherein the recirculating aquaculture water treatment system comprises a temperature regulating pond, an aquaculture pond, a water treatment device, a first recirculating water pump and a second recirculating water pump;
the second liquid outlet of the open-shelf gasifier and the second liquid outlet of the cold accumulation device are connected with the water inlet of the temperature adjusting pool through a water inlet pipe;
the water outlet of the water treatment device is respectively connected with the second liquid inlet of the open rack vaporizer and the second liquid inlet of the cold accumulation device through a water outlet pipe;
the water outlet of the temperature regulating pool is connected with the water inlet of the first circulating water pump;
the water outlet of the first circulating water pump is respectively connected with the water inlet of the culture pond and the water outlet pipe through a water separator;
the water outlet of the culture pond is connected with the water inlet of the second circulating water pump through a water collector;
the water outlet of the second circulating water pump is connected with the water inlet of the water treatment device;
the waste discharge port of the water treatment device is connected with the outside.
3. The circulating water culture cooling system based on LNG cold energy utilization of claim 2, wherein the second liquid outlet of the open rack vaporizer and the second liquid outlet of the cold accumulation device are connected with the water inlet pipe through a three-way flow control valve.
4. The circulating water aquaculture cooling system based on LNG cold energy utilization of claim 2, further comprising: a first fresh water supply pipe;
a liquid level control valve is arranged in the temperature adjusting tank;
the first fresh water supply pipe is connected with the liquid level control valve.
5. The circulating water culture cooling system based on LNG cold energy utilization of claim 2, characterized in that the outlet pipe is provided with a fresh water supply port;
and the water outlet pipe is connected with a second fresh water supply pipe through the fresh water supply port.
6. The circulating water culture cooling system based on LNG cold energy utilization of claim 5, characterized in that, the inlet pipe is provided with a water outlet for discharging excessive water.
7. The circulating water culture cooling system based on LNG cold energy utilization of claim 6, wherein the fresh water supply port, the water outlet, the liquid inlet of the submerged combustion gasifier, between the water separator and the water outlet pipe, the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the open rack gasifier, and the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the cold accumulation device are all provided with regulating valves for controlling water flow.
8. The circulating water culture cooling system based on LNG cold energy utilization of claim 1, wherein the liquid outlet of the LNG liquid storage tank, the gas outlet of the submerged combustion vaporizer, the gas outlet of the air-temperature vaporizer, the second liquid outlet of the open rack vaporizer and the second liquid outlet of the cold storage device are all provided with check valves.
9. The circulating water aquaculture cooling system based on LNG cold energy utilization of claim 2, further comprising: a temperature monitoring device;
the temperature monitoring device comprises a temperature controller and a temperature sensor electrically connected with the temperature controller;
the temperature controller is arranged in the temperature adjusting pool;
the temperature sensors are respectively arranged at the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the open rack type gasifier, and the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of the cold accumulation device.
10. The circulating water culture cooling system based on LNG cold energy utilization of claim 2, characterized in that an automatic air release valve is arranged at the top of the temperature adjusting pond.
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| JP2004183967A (en) * | 2002-12-03 | 2004-07-02 | Fujimi Bussan:Kk | Multi-stage type utilization system for heat sink |
| CN104396850B (en) * | 2014-11-14 | 2017-06-30 | 江苏嘉成轨道交通安全保障系统有限公司 | A kind of industrialized aquiculture system and its intelligence control system |
| TWI574611B (en) * | 2015-08-21 | 2017-03-21 | Bo-Kun Zeng | Sea cucumber method |
| CN105325331A (en) * | 2015-10-22 | 2016-02-17 | 天津丰沛水产养殖有限公司 | Cold water fish closed cycle culturing temperature regulating device and method |
| CN105660511B (en) * | 2016-02-03 | 2018-10-26 | 华中农业大学 | A kind of high density live fish carrier and its transportation resources |
| CN109329173A (en) * | 2018-10-29 | 2019-02-15 | 山东凯东生物科技有限公司 | A kind of water flow microcirculqtory system based on hirudiniculture |
| TWM593138U (en) * | 2019-12-25 | 2020-04-11 | 林群超 | Circulating shrimp farming system |
| CN112385597B (en) * | 2020-11-24 | 2023-08-04 | 广东海洋大学 | Culture pond system with circulation water temperature adjusting function |
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