JP4084352B2 - Multi-stage utilization system for deep ocean water - Google Patents

Description

  The present invention relates to a multi-stage utilization system for deep ocean water that effectively utilizes low temperature properties, eutrophication, and cleanliness of deep ocean water.

  Deep ocean water is stable at low temperatures of 1-5 ° C. and outside, and is clean and is used in many fields. A patent for a power generation system has been published as one that uses the low temperature of deep ocean water (see Patent Document 1), and also to brewery production plants, electronic component production plants, power generation plants, thalassotherapy facilities, cold heat supply plants, etc. Patents that are used for multiple purposes are also disclosed (see Patent Document 2).

  However, in the fields of agriculture and fisheries that require low temperatures, the use of cold energy of deep ocean water is low, and mainly electric energy is used, resulting in an excessive burden of light and heat costs.

  As a technique using the eutrophication of deep sea water, there is a cultivation method of radish radish (see Patent Document 3), but since the deep water dilution water is used, the eutrophication of deep water is fully utilized. It's hard to say.

  In addition, the cooling water obtained by using the low temperature of deep ocean water, or the cooling water produced by a heat exchanger, etc. are used step by step as cold energy, and then the mineral richness and eutrophicity possessed by deep ocean water are obtained. No attempt has been made to use it effectively, and the cooling water after use is drained as it is.

Japanese Patent Laid-Open No. 11-14831 JP 2000-087579 A JP 2002-58368 A

  Low temperature, eutrophication, and cleanliness are known as the three major characteristics of deep ocean water, but as described above, any one of these characteristics is currently used alone. For example, cooling water using deep water as a cooling heat source is used once for cooling and is discharged as it is. A lot of energy is consumed in pumping deep sea water, and it must be said that it is extremely inefficient from the viewpoint of energy balance, and the development of a method for fully utilizing the characteristics of deep sea water is an issue to be solved. is there.

  In order to solve the above problems, the present inventors have conducted extensive research, and as a result, using cooling water obtained by using low-temperature properties of deep ocean water as a cold heat source or cooling water made with a heat exchanger, etc. In the first stage, after cooling the interior of the livestock building, the agricultural cold greenhouse, and the fish tank, desalting the deep ocean water used in the first stage, and subsequently drinking the demineralized water in the second stage, It is used for irrigation of plants, fish tank water, and seafood nutritional aids. As described above, it has been found that the above problem can be solved by constructing a multi-stage utilization system that utilizes the eutrophic property of deep ocean water after utilizing the low temperature property of the deep ocean water, thereby completing the present invention. It was.

That is, the present invention has the following configuration.
(1) Cooling water using deep ocean water as a cooling source, cooling the interior of the livestock building, cooling the indoor cold greenhouse, cooling the ground temperature of the agricultural cold greenhouse, and fish tank water in the first stage Then, at least one operation selected from the group consisting of cooling is performed, and then the deep sea water used in the first stage is desalted by a desalting step by a diffusion dialysis method using a mosaic charged membrane , and this is the second stage. A multistage use system of deep ocean water characterized by being used in at least one selected from the group consisting of drinking livestock, irrigation of plants, fish tank water and fish nutritional supplements.
(2) The multistage utilization system of deep ocean water according to (1), wherein the first stage is cooling in a livestock building, and the second stage is utilization for drinking livestock.
(3) The multistage use system of deep ocean water according to (1), wherein the first stage is cooling of the indoor and / or ground temperature of an agricultural cold greenhouse, and the second stage is use for irrigation of plants. .
(4) The multistage utilization system of deep sea water according to (1), wherein the first stage is cooling of fish tank water and the second stage is utilization of fish tank water and / or nutritional supplements .

  With the multi-stage utilization system of deep sea water in the present invention, it is possible to effectively use the characteristics of the deep sea water such as low temperature, eutrophication and cleanliness.

  The deep ocean water used in the present invention is preferably deep ocean water having a depth of 200 m or more. If it is deep sea water of 200 m or deeper, since sunlight does not reach, the water temperature is low throughout the seasons, and mixing with surface water does not occur, so highly deep sea water can be obtained. This deep ocean water can be used that has been pumped using intake pipes and intake pumps in intake areas such as Kochi, Okinawa, Toyama and Yaizu.

  The taken deep sea water is directly sent as cooling water or sent to a known heat exchange device such as a plate heat exchanger to exchange heat with tap water. Deep ocean water or heat-exchanged cooling tap water is sent through a pipe to a livestock building building or an agricultural cold greenhouse, and cools by discharging cold air from a cooling unit installed in the room. The ground temperature of an agricultural cold greenhouse or a fish tank is cooled by circulating cooling water through piping buried underground or in water.

  For agriculture, for example, it is used for forcing cultivation and suppression cultivation by adjusting the temperature of daytime and nighttime in an agricultural cold greenhouse to produce high value-added fruits, vegetables, and petals. It is also useful for growing plants that require low temperatures for growth, such as high-latitude plants and alpine plants. Thus, in the agricultural field, it is widely used for low-temperature management, low-temperature treatment, and the like, for example, avoiding high-temperature rosettes of eustoma, promotion of flower bud differentiation such as orchids, starches and strawberries, and year-round cultivation of wasabi.

  In the livestock sector, cooling of livestock houses is effective in reducing the heat stress of livestock in the summer. Heat stress causes a decrease in feed intake of livestock, resulting in a decrease in reproductive performance due to abnormal hormone secretion, poor fattening, and a decrease in milk or egg production. In order to avoid such a situation, it is known that summer barn cooling is an effective means.

  As a specific example of the barn cooling, there is a barn cooling for breeding pigs. It is known that breeding pigs have a suitable temperature range of 15 to 18 ° C., and if the temperature exceeds 30 ° C., the amount of semen and the number of spermatozoa will decrease, and the conception rate will decrease. For this reason, in pig farming, summer temperature management of livestock buildings is an important issue that affects the breeding rate of pigs. According to the present invention, effective breeding management can be performed by cooling the interior of a livestock building and raising pigs in an appropriate temperature range.

  Examples of use in seafood include the growth of seafood. For example, the proper growth temperature of yamame trout is 8 to 10 ° C., and the optimal growth temperature of rainbow trout is 11 to 14 ° C. By adjusting the tank temperature to the temperature range according to the present invention, good growth of fish can be expected. Similarly, it can also be applied to the cultivation of seafood such as madara, grouper, crab and shrimp that prefer low temperatures.

Looking at the cooling part of this system, the necessary cost is the pumping and circulating costs of the pump. Although it is difficult to compare costs depending on the conditions, for example, when the outside air temperature is 35 ° C, a light-shielding glass greenhouse with an area of 1,000 m ² and a height of 6 m is cooled to 25 ° C. 10 electricity bills will be enough.

  The deep ocean water after being used as cooling water or a cold heat source can be reused as long as the water temperature maintains the low temperature required for the first stage use. Deep sea water, which is used as a cold heat source and has an elevated water temperature, is sent to the desalination process.

  Here, deep ocean water has a high salinity like surface water and cannot be used directly for the second stage. Therefore, it is necessary to adjust salt concentration and mineral balance by some desalting process.

Desalting method of deep sea water, Ru using diffusion dialysis method using a mosaic charged membrane. Mosaic diffusion dialysis method using a charged membrane, electrical, an energy-saving desalination method that requires very little pressure, flow rate ratio between it and the raw water and the dialysis water that can be held without destroying the rich nutrients deep water This is a preferable method for the desalting step because the salt concentration and mineral balance can be easily adjusted by simply controlling the amount of salt.

  Desalted deep ocean water is used in the second stage for livestock drinking, plant irrigation, fish tank water and fish nutritional supplements. It is effective in promoting the growth of livestock, plants and fish due to the eutrophication of deep water. Furthermore, in order to increase the concentration of eutrophication, a concentration step may be incorporated into the multistage utilization system of the present invention before and after the desalting step.

  Since deep sea water has high cleanliness, steps such as sterilization and sterilization are generally unnecessary and can be used for the above purpose as they are. However, when strict sterilization is required, a sterilization and sterilization process may be incorporated.

  With the multi-stage utilization system of deep sea water in the present invention, it is possible to effectively use the characteristics of the deep sea water such as low temperature, eutrophication and cleanliness.

Claims (4)

Using cooling water using deep ocean water as a cooling heat source, from the first stage, cooling of livestock building rooms, cooling of agricultural cold greenhouses, cooling of agricultural cold greenhouses, and cooling of fish tank water At least one operation selected from the group consisting of the following, followed by desalination of the deep sea water used in the first stage by a desalination process by a diffusion dialysis method using a mosaic charged membrane , A multistage use system for deep sea water, characterized in that it is used for at least one selected from the group consisting of drinking water, plant irrigation, fish tank water and fish nutritional supplements.   The multistage use system of deep ocean water according to claim 1, wherein the first stage is cooling in a livestock building, and the second stage is use for drinking livestock.   The multistage use system of deep ocean water according to claim 1, wherein the first stage is cooling of indoor and / or ground temperature of an agricultural cold greenhouse, and the second stage is use for irrigation of plants.   The multistage utilization system of deep ocean water according to claim 1, wherein the first stage is cooling of fish tank water, and the second stage is use for fish tank water and / or nutritional supplements.