Device and method for preparing ice slurry from seawater

Abstract

The invention relates to the technical field of preparation of ice slurry from seawater, in particular to a device and a method for preparing ice slurry from seawater. The invention discloses a device for preparing ice slurry by utilizing seawater. The device comprises a seawater supply system, a refrigerant circulating system, a supercooled water circulating system and an ice slurry conveying system, the seawater supply system is communicated with outside seawater, and the seawater supply system is further connected with the refrigerant circulation system, the supercooled water circulation system and the ice slurry conveying system; the seawater supply system is used for providing seawater raw materials and cooling materials; the refrigerant circulating system is used for heat exchange; and the supercooled water circulation system is used for preparing ice slurry. A scraping mode is not adopted, the use energy efficiency is not high, a seawater supply system is used for providing a seawater raw material for the device, and the seawater supply system is used for providing a cooling material for a refrigerant circulation system. Therefore, seawater raw materials are rich in source and almost free, the condensation temperature can be reduced by using seawater as a cooling medium, and the purpose of improving the energy efficiency of the system can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of preparing ice slurry from seawater, and in particular to a device and method for preparing ice slurry from seawater. Background Art

[0002] Ice slurry can be used as an excellent cold storage medium because of its high latent heat of 333KJ / kg and good heat exchange characteristics. Using seawater to make ice slurry has its unique advantages. On the one hand, the raw materials for seawater ice making are abundant and almost free. On the other hand, using seawater as a cooling medium can reduce the condensation temperature and achieve the purpose of improving the energy efficiency of the system. In addition, in the field of on-site consumption of deep-sea wind power, seawater ice slurry, as a good cold storage medium, can convert the electrical energy of wind turbines into cold energy and store it with the help of ice slurry preparation equipment, which can meet the ice and cold needs of offshore fishing vessels.

[0003] Most of the current patents and related research focus on using seawater as raw material for preparation, but rarely consider the role of seawater as a cooling medium in improving the system energy efficiency.

[0004] For example, the utility model patent with patent number 202022520901.7 discloses a seawater ice slurry machine that uses a scraping method to produce seawater ice slurry. This method does not use seawater as a cooling medium, but uses a scraping method with high energy consumption, resulting in a high system energy efficiency.

[0005] In addition, compared with the ice slurry prepared by the supercooled water method, the ice slurry obtained by the scraping method is difficult to pump. The invention patent application with patent application number 201410143609.4 discloses a device for desalination of seawater using a natural cold source. The device uses the supercooling method for desalination of seawater, but mainly focuses on the design of the supercooled water side, and uses ethylene glycol circulation as the cold source supply cycle, which increases the intermediate links and increases the energy consumption of the system.

[0006] The utility model patent with patent number 201821255342.8 discloses an adsorption refrigeration, load cooling and seawater desalination device driven by ship waste heat. The method considers seawater as a cooling medium, but the device adopts an adsorption refrigeration method. The adsorption refrigeration and supercooling method have great differences in system structure, and there are great differences in the ice making steps and the selection method of related thresholds from the supercooling method.

[0007] It can be seen that the current method of using seawater to make ice slurry usually designs a water circulation at the evaporation end, and the commonly used means are direct air cooling or water cooling, but does not consider the impact of seawater as the raw material for seawater making at the evaporation end and the cooling medium at the condensation end on the system performance, and also lacks relevant overall design.

[0008] In addition, the devices and methods for preparing ice slurry from seawater in the prior art are usually only applicable to inland areas, and are less applicable in places such as floating power generation platforms in the deep sea. Summary of the invention

[0009] The purpose of the present invention is to solve the problems existing in the prior art and provide a device and method for preparing ice slurry using seawater.

[0010] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0011] A device for making ice slurry using seawater, comprising a seawater supply system, a refrigerant circulation system, a supercooled water circulation system and an ice slurry conveying system;

[0012] The seawater supply system is connected to the external seawater, and the seawater supply system is also connected to the refrigerant circulation system, the supercooled water circulation system and the ice slurry conveying system respectively;

[0013] The seawater supply system is used to provide seawater raw materials and cooling materials;

[0014] The refrigerant circulation system is used for heat exchange;

[0015] The supercooled water circulation system is used to prepare ice slurry.

[0016] As an improvement of the technical solution of the device for making ice slurry using seawater of the present invention, the seawater supply system includes a seawater pool, an ice storage tank, a seawater pump and a plurality of valves, the seawater pump is connected to the seawater pool, and the plurality of valves are used to control the flow direction of the seawater;

[0017] The refrigerant circulation system includes a subcooler, a compressor, a heat exchanger and a throttle valve which are connected in a circulation manner;

[0018] The supercooled water circulation system comprises a filter, an ice pump and a crystal promoter connected in sequence, and the filter is arranged in the ice storage tank;

[0019] The refrigerant circulation system includes a heat exchanger and a subcooler. The refrigerant circulation system is connected to the seawater supply system through the heat exchanger, and the refrigerant circulation system is connected to the supercooled water circulation system through the subcooler.

[0020] As an improvement of the technical solution of the device for making ice slurry using seawater of the present invention, the plurality of valves include a first valve, a second valve, a third valve, a fourth valve and a fifth valve;

[0021] The seawater inlet of the seawater supply system is connected to the external seawater through a first pipe, and the first valve is provided on the first pipe;

[0022] The seawater outlet of the seawater supply system is connected to the external seawater through a fifth pipe, and the fifth pipe is provided with the fifth valve;

[0023] The first pipeline is connected to the second pipeline, the third pipeline and the fourth pipeline respectively, the second pipeline is also connected to the seawater outlet of the seawater pool, and the second pipeline is provided with the second valve;

[0024] The third pipeline is also connected to the ice storage tank, and the third pipeline is provided with the third valve;

[0025] The fourth pipeline is also connected to the seawater inlet of the seawater pool, and the fourth valve is arranged on the fourth pipeline.

[0026] As an improvement of the technical solution of the device for preparing ice slurry using seawater according to the present invention, the supercooler is a plate-type evaporative supercooler.

[0027] As an improvement of the technical solution of the device for preparing ice slurry using seawater according to the present invention, the heat exchanger is a plate-type condensing heat exchanger.

[0028] As an improvement of the technical solution of the device for making ice slurry from seawater according to the present invention, the ice storage tank is made of stainless steel or flexible material and is in the shape of a bag.

[0029] As an improvement of the technical solution of the device for preparing ice slurry using seawater according to the present invention, the ice slurry in the ice storage tank is pumpable ice slurry.

[0030] As an improvement of the technical solution of the device for preparing ice slurry using seawater according to the present invention, a temperature sensor is provided in the seawater pool.

[0031] A method for preparing ice slurry using seawater, using the above-mentioned device for preparing ice slurry using seawater, comprises the following steps:

[0032] Filling seawater pools and ice storage tanks with seawater;

[0033] Ice slurry is produced through a supercooled water circulation system, and heat exchange and supercooling are performed through a refrigerant circulation system;

[0034] The ice slurry is transported outwards through the ice slurry transport system.

[0035] A method for preparing ice slurry using seawater, using the above-mentioned device for preparing ice slurry using seawater, comprises the following steps:

[0036] The following steps are included:

[0037] Filling seawater pools and ice storage tanks with seawater;

[0038] Start the ice pump and the seawater pump, and after the ice pump is started for a certain period of time, the compressor is used to produce ice slurry;

[0039] When the ice slurry concentration in the ice storage tank reaches the set value, the ice slurry is transported to the outside through the ice slurry transport system.

[0040] Beneficial effects of the present invention:

[0041] 1. The present invention does not adopt scraping, which is not energy efficient. In addition, the seawater supply system provides the seawater raw material for the present invention, and the seawater supply system provides cooling material for the present invention, especially the refrigerant circulation system. In this way, the seawater raw material source is abundant and almost free, and the use of seawater as a cooling medium can reduce the condensation temperature, thereby achieving the purpose of improving the energy efficiency of the system;

[0042] 2. By using seawater as both the raw material for ice slurry production and the cooling medium at the condensation end, and combining it with the supercooling method for ice slurry preparation technology, the energy efficiency of the seawater ice slurry preparation system can be improved, and the structure of the system can be simplified. It can be used for new energy power consumption and cold energy storage in application scenarios such as coasts, islands, and offshore farms. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of the present invention.

[0044] Explanation of the reference numerals: 101 - first valve; 102 - second valve; 103 - third valve; 104 - fourth valve; 105 - fifth valve; 201 - seawater pool; 202 - seawater pump; 203 - ice storage tank; 301 - compressor; 302 - heat exchanger; 303 - throttle valve; 304 - subcooler; 401 - ice making pump; 402 - crystal promoter; 403 - filter; 501 - seawater stirring device; 502 - ice slurry delivery pump. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] The present invention is mainly used for preparing ice slurry from seawater, and is not only applicable to inland areas, but also to occasions such as floating power generation platforms in the deep sea.

[0047] like Figure 1 As shown, a device for preparing ice slurry using seawater includes a seawater supply system, a refrigerant circulation system, a supercooled water circulation system and an ice slurry conveying system;

[0048] The seawater supply system is connected to the external seawater, and the seawater supply system is also connected to the refrigerant circulation system, the supercooled water circulation system and the ice slurry conveying system respectively;

[0049] The seawater supply system is used to provide seawater raw materials and cooling materials;

[0050] The refrigerant circulation system is used for heat exchange;

[0051] The supercooled water circulation system is used to make ice slurry.

[0052] As an embodiment of the present invention, the seawater supply system includes a seawater pool 201, an ice storage tank 203, a seawater pump 202 and a plurality of valves, the seawater pump 202 is connected to the seawater pool 201, and the plurality of valves are used to control the flow direction of the seawater;

[0053] The refrigerant circulation system includes a subcooler 304, a compressor 301, a heat exchanger 302 and a throttle valve 303 which are connected in a circulation manner;

[0054] The supercooled water circulation system includes a filter 403, an ice pump 401 and a crystal promoter 402 which are connected in sequence. The filter 403 is arranged in the ice storage tank 203. Under the action of the filter 403, ice slurry is prevented from entering the refrigerant circulation system.

[0055] The refrigerant circulation system includes a heat exchanger 302 and a subcooler 304 . The refrigerant circulation system is connected to the seawater supply system through the heat exchanger 302 , and the refrigerant circulation system is connected to the subcooled water circulation system through the subcooler 304 .

[0056] The ice slurry conveying system includes a seawater stirring device 501 and an ice slurry conveying pump 502. The ice slurry conveying pump 502 is arranged on a pipeline connecting the ice storage tank 203 and the outside world. The ice slurry is conveyed to the outside world by the ice slurry conveying pump 502. In order to prevent the ice slurry from freezing, the ice slurry conveying system also includes a seawater stirring device 501. The stirring component of the seawater stirring device 501 extends into the ice storage tank 203 to achieve the effect of stirring the ice slurry.

[0057] When the present invention is in use, the corresponding valves are opened to add seawater to the seawater pool 201 and the ice storage tank 203, and then the corresponding valves are opened to start the ice-making pump 401 and the seawater pump 202, wherein the compressor 301 is started after the ice-making pump 401 is started for a certain period of time to achieve the effect of ice making; when the ice slurry concentration in the ice storage tank 203 reaches the set value, the ice slurry is transported to the outside through the ice slurry transport system.

[0058] In some embodiments of the present invention, the supercooler 304 is a plate-type evaporative supercooler 304, which can not only achieve the supercooling effect but also reduce the overall volume of the present invention.

[0059] In some embodiments of the present invention, the heat exchanger 302 is a plate-type condensing heat exchanger 302, which can not only achieve the effect of heat exchange, but also reduce the overall volume of the present invention.

[0060] In detail, in the present invention, seawater is injected into the seawater pool 201 and the ice storage tank 203 in the seawater supply system, thereby achieving the effect of providing seawater raw materials for the present invention;

[0061] When a certain amount of seawater is injected into the ice storage tank 203, the ice making pump 401 and the crystal promoter 402 in the supercooled water circulation system are started, and combined with the supercooler 304, the compressor 301 and the heat exchanger 302 in the refrigerant circulation system, the effect of lowering the temperature of the seawater and producing ice slurry is achieved. When a certain amount of ice slurry is formed in the ice storage tank 203, the ice slurry is transported to the outside through the ice slurry transportation system.

[0062] Moreover, since the seawater pool 201 is connected to the refrigerant circulation system through the heat exchanger 302, when the compressor 301 compresses the seawater, the temperature of the seawater will rise. After passing through the compressor 301, the seawater enters the heat exchanger 302 to exchange heat with the seawater in the seawater supply system, thereby achieving the effect of providing cooling material for the heat exchanger 302 through the seawater supply system.

[0063] That is, the present invention does not adopt the scraping method, which is not energy efficient, and in the present invention, the seawater raw material is provided for the present invention through the seawater supply system, and the cooling material is provided for the present invention, especially the refrigerant circulation system, through the seawater supply system. In this way, the source of seawater raw material is abundant and almost free, and the use of seawater as a cooling medium can reduce the condensation temperature, so as to achieve the purpose of improving the energy efficiency of the system.

[0064] Further, the plurality of valves include a first valve 101, a second valve 102, a third valve 103, a fourth valve 104 and a fifth valve 105;

[0065] The seawater inlet of the seawater supply system is connected to the external seawater through a first pipe, and a first valve 101 is provided on the first pipe;

[0066] The seawater outlet of the seawater supply system is connected to the external seawater through a fifth pipeline, and a fifth valve 105 is provided on the fifth pipeline;

[0067] The first pipeline is connected to the second pipeline, the third pipeline and the fourth pipeline respectively, the second pipeline is also connected to the seawater outlet of the seawater pool 201, and the second pipeline is provided with a second valve 102;

[0068] The third pipeline is also connected to the ice storage tank 203, and a third valve 103 is provided on the third pipeline;

[0069] The fourth pipeline is also connected to the seawater inlet of the seawater pool 201 , and a fourth valve 104 is provided on the fourth pipeline.

[0070] In detail, when preparing ice slurry, the second valve 102 and the fourth valve 104 are closed, and the first valve 101 and the third valve 103 are opened, and the seawater pump 202 is started to inject seawater into the ice storage tank 203 until the water level reaches the set value.

[0071] Close the third valve 103 and the second valve 102, and start the seawater pump 202 to add seawater into the water return tank.

[0072] The first valve 101 and the third valve 103 are closed, and the second valve 102 and the fourth valve 104 are opened, the ice-making pump 401 and the seawater pump 202 are started, and the compressor 301 is started after the ice-making pump 401 is started for a certain period of time; when the ice slurry concentration in the ice storage tank 203 reaches the set value and ice needs to be taken, the agitator and the ice slurry delivery pump 502 are started to deliver the ice slurry to the outside.

[0073] In some embodiments of the present invention, the ice storage tank 203 is made of stainless steel or flexible material and is in the shape of a bag. When the present invention is applied to deep sea wind power consumption, the ice storage tank can be immersed or suspended in water. Furthermore, the ice slurry in the ice storage tank 203 is a pumpable ice slurry, which can facilitate the transportation of the ice slurry.

[0074] In some embodiments of the present invention, a temperature sensor is provided in the seawater pool 201, and the temperature in the seawater pool 201 is detected by the temperature sensor. When the difference between the seawater temperature in the seawater pool 201 and the water intake temperature of the external seawater reaches a set value, the first valve 101 and the fifth valve 105 are opened, and the second valve 102 is closed, until the seawater temperature in the seawater pool 201 is similar to the external seawater temperature, the fifth valve 105 is closed, until the water level in the seawater pool 201 reaches the set value, the second valve 102 is opened, and the first valve 101 is closed.

[0075] In detail, the difference between the seawater temperature in the seawater pool 201 and the water intake temperature of the external seawater reaches a set value, and the temperature difference ΔT=ΔWPump / (2%Wcom) must be satisfied, wherein ΔWPump represents the pump power difference of the seawater pump 202 when it extracts external seawater and when it does not extract external seawater, and Wcom represents the rated power of the compressor 301. The power of the compressor 301 is determined by detecting the temperature difference between the seawater temperature in the seawater pool 201 and the external seawater.

[0076] The present invention also discloses a method for preparing ice slurry using seawater, using the device for preparing ice slurry using seawater as described above, comprising the following steps:

[0077] Injecting seawater into the seawater pool 201 and the ice storage tank 203;

[0078] Ice slurry is produced through a supercooled water circulation system, and heat exchange and supercooling are performed through a refrigerant circulation system;

[0079] The ice slurry is transported outwards through the ice slurry transport system.

[0080] Furthermore, a method for preparing ice slurry using seawater, using the above-mentioned device for preparing ice slurry using seawater, comprises the following steps:

[0081] Injecting seawater into the seawater pool 201 and the ice storage tank 203;

[0082] Start the ice pump 401 and the seawater pump 202. After the ice pump 401 is started for a certain period of time, the compressor 301 is used to produce ice slurry;

[0083] When the ice slurry concentration in the ice storage tank 203 reaches a set value, the ice slurry is transported to the outside through the ice slurry transport system.

[0084] In detail, when preparing ice slurry, the second valve 102 and the fourth valve 104 are closed, and the first valve 101 and the third valve 103 are opened, and the seawater pump 202 is started to inject seawater into the ice storage tank 203 until the water level reaches the set value.

[0085] Close the third valve 103 and the second valve 102, and start the seawater pump 202 to add seawater into the water return tank.

[0086] The first valve 101 and the third valve 103 are closed, and the second valve 102 and the fourth valve 104 are opened, the ice-making pump 401 and the seawater pump 202 are started, and the compressor 301 is started after the ice-making pump 401 is started for a certain period of time; when the ice slurry concentration in the ice storage tank 203 reaches the set value and ice needs to be taken, the agitator and the ice slurry delivery pump 502 are started to deliver the ice slurry to the outside.

[0087] In the present invention, the compressor 301 is started after the ice pump 401 is started for a certain period of time, where the certain period of time may be 1 minute or longer, to ensure the normal use and service life of the ice pump 401 and the compressor 301.

[0088] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A device for producing ice slurry using seawater, characterized in that: It includes seawater supply system, refrigerant circulation system, supercooled water circulation system and ice slurry transportation system; The seawater supply system is connected to the external seawater, and the seawater supply system is also connected to the refrigerant circulation system, the supercooled water circulation system and the ice slurry conveying system respectively; The seawater supply system is used to provide seawater raw materials and cooling materials; The refrigerant circulation system is used for heat exchange; The supercooled water circulation system is used to prepare ice slurry.

2. The device for preparing ice slurry using seawater according to claim 1, characterized in that: The seawater supply system includes a seawater pool, an ice storage tank, a seawater pump and a plurality of valves, wherein the seawater pump is connected to the seawater pool, and the plurality of valves are used to control the flow direction of the seawater; The refrigerant circulation system includes a subcooler, a compressor, a heat exchanger and a throttle valve which are connected in a circulation manner; The supercooled water circulation system comprises a filter, an ice pump and a crystal promoter connected in sequence, and the filter is arranged in the ice storage tank; The refrigerant circulation system includes a heat exchanger and a subcooler. The refrigerant circulation system is connected to the seawater supply system through the heat exchanger, and the refrigerant circulation system is connected to the supercooled water circulation system through the subcooler.

3. The device for preparing ice slurry using seawater according to claim 2, characterized in that: The plurality of valves include a first valve, a second valve, a third valve, a fourth valve and a fifth valve; The seawater inlet of the seawater supply system is connected to the external seawater through a first pipe, and the first valve is provided on the first pipe; The seawater outlet of the seawater supply system is connected to the external seawater through a fifth pipe, and the fifth pipe is provided with the fifth valve; The first pipeline is connected to the second pipeline, the third pipeline and the fourth pipeline respectively, the second pipeline is also connected to the seawater outlet of the seawater pool, and the second pipeline is provided with the second valve; The third pipeline is also connected to the ice storage tank, and the third pipeline is provided with the third valve; The fourth pipeline is also connected to the seawater inlet of the seawater pool, and the fourth valve is arranged on the fourth pipeline.

4. The device for preparing ice slurry using seawater according to claim 2, characterized in that: The supercooler is a plate-type evaporative supercooler.

5. The device for preparing ice slurry using seawater according to claim 2, characterized in that: The heat exchanger is a plate-type condensing heat exchanger.

6. The device for preparing ice slurry using seawater according to claim 2, characterized in that: The ice storage tank is made of stainless steel or flexible material and is in a bag-shaped ice storage tank.

7. The device for preparing ice slurry using seawater according to claim 2 or 6, characterized in that: The ice slurry in the ice storage tank is pumpable ice slurry.

8. The device for preparing ice slurry using seawater according to claim 1, characterized in that: A temperature sensor is arranged in the seawater pool.

9. A method for producing ice slurry using seawater, characterized in that: The device for preparing ice slurry from seawater as claimed in any one of claims 1 to 8 comprises the following steps: Filling seawater pools and ice storage tanks with seawater; Ice slurry is produced through a supercooled water circulation system, and heat exchange and supercooling are performed through a refrigerant circulation system; The ice slurry is transported outwards through the ice slurry transport system.

10. A method for producing ice slurry using seawater, characterized in that: The device for preparing ice slurry from seawater as claimed in any one of claims 2 to 8 comprises the following steps: Filling seawater pools and ice storage tanks with seawater; Start the ice pump and the seawater pump, and after the ice pump is started for a certain period of time, the compressor is used to produce ice slurry; When the ice slurry concentration in the ice storage tank reaches the set value, the ice slurry is transported to the outside through the ice slurry transport system.

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