JP3084014U - Aseptic purified cold seawater production equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseptic purified cold seawater production apparatus capable of storing production water while maintaining its quality even after production while making the whole compact. SOLUTION: Natural seawater as a raw material is temporarily stored in a raw water tank 1.
It is held at 1. The raw seawater pumped from the raw water tank 11 by the pump 12 is first subjected to coarse filtration by the first prefilter 13, fine filtration by the second prefilter 14, and the UF membrane module 15 in the filtration unit 10.
Ultrafiltration is performed. The filtered seawater is cooled in the cooling device 21 to a predetermined temperature. The cooled seawater is once held in the storage tank 31 and sent to the sterilization unit 40, where the cold seawater ultraviolet flowing water sterilizer 41 is provided.
Sterilization is performed. The sterilized seawater is returned to the storage tank 31. In addition, since the temperature of the seawater in the storage tank 31 gradually rises when it is left, the seawater is continuously or intermittently sent to the cooling unit 20 and cooled therein. As a result, the aseptic state and the low temperature state of the seawater in the storage tank 31 are maintained.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for producing aseptic purified cold seawater required for handling marine products onboard, on the beach, or inland.

[0002]

[Prior art]

 Conventionally, in order to produce cold seawater, natural seawater has been roughly filtered, microfiltered, and then cooled. Coarse filtration removes foreign matter of about 20 μm or more such as algae and suspended matter in natural seawater, and microfiltration removes bacteria using an ultrafilter (UF membrane). Generally, ice blocks are put in or cooling is used for cooling.

[0003]

[Problems to be solved by the invention]

 In the conventional method, these processes were performed by separate devices, and each device was separately arranged and operated independently. For this reason, a large installation area is required as a whole, and it was difficult for cold seawater users, such as small-scale fish and shellfish handling companies, to install this in their own facilities. Further, if the purified cold seawater thus produced is not used within a short time, there is a problem that the temperature rises and the bacteria proliferate and become unusable.

The present invention has been made to solve such a problem, and its purpose is to make the whole compact, maintain its quality even after manufacturing, and reduce secondary contamination. It is an object of the present invention to provide an aseptic purified cold seawater production apparatus capable of storing production water while preventing the production.

[0005]

[Means for Solving the Problems]

 The aseptic purified cold seawater production apparatus according to the present invention made to solve the above-mentioned problems includes: a) a filtration unit for removing unnecessary substances such as various bacteria from seawater; and b) filtered seawater and / or the following. A cooling unit for cooling seawater in the storage tank; c) a storage tank for holding the cooled seawater; and d) a sterilizing unit for sterilizing the seawater in the storage tank.

[0006]

[Embodiment of the invention]

 Unnecessary substances such as various bacteria are first removed from the natural seawater in the filtration section. In the filtration section, filtration may be performed in two or three or more stages, such as coarse filtration and microfiltration. The filtered seawater is cooled in the cooling section. The cooling temperature at this time is appropriately set according to the intended use of the seawater to be produced, but is usually about 0 to 15 ° C.

[0007] The cooled seawater is temporarily held in a storage tank and sent to a sterilizing section. In the sterilization section, sterilization is performed using a cold seawater ultraviolet water flow sterilizer or the like. The sterilized seawater is returned to the storage tank. Also, since the temperature of the seawater in the storage tank gradually rises if left untreated, it is continuously or intermittently sent to the cooling section, where it is cooled. As a result, the aseptic and low-temperature conditions of the seawater in the storage tank are maintained.

[0008]

[Effect of the invention]

 By selecting an appropriate filtration device or filtration membrane in the filtration section, it is possible to remove only harmful substances such as fine particles and bacteria and to pass only useful components such as minerals in natural seawater. Therefore, with the device according to the present invention, it is possible to produce aseptic, purified, high-quality purified cold seawater that is rich in useful natural components and does not add or alter anything with a space-saving and compact type facility. It becomes possible. In addition, since such high quality can be maintained for a long time, small and medium-sized fish and shellfish handling companies can easily use such high quality seawater.

[0009] The aseptic purified cold seawater produced by the apparatus according to the present invention is seawater containing natural active ingredients as they are obtained by removing harmful organic substances and various germs from natural seawater. Cold seawater that is aseptic and purified to a cold temperature without waste.It is also useful in, for example, cooling, washing, processing, fish culture, and other uses of marine products, and in maintaining its quality and freshness. It is also very useful for preventing diffusion. There are also applications that can be used in place of expensive water supply, which is also useful as a water saving measure.

[0010]

【Example】

 FIG. 1 is a flow chart showing the processing steps of an aseptic purified cold seawater producing apparatus according to one embodiment of the present invention, and FIGS. 2 and 3 are a plan view and a front view showing a specific configuration thereof. Embodiments of the present invention will be described below with reference to these drawings.

As shown in FIG. 1, the apparatus of this embodiment includes a filtration unit 10, a cooling unit 20, a sterile cold seawater storage unit 30, and a sterilization unit 40. The filtration unit 10 is provided with the following devices.

A raw water tank 11 is a tank for temporarily storing seawater as raw water. The water level is always detected by a water level sensor provided in the tank, and when the water level falls below a predetermined level, seawater is supplied into the raw water tank 11 by a pump (not shown).

The first pre-filter 13 is a filter for performing coarse filtration for removing large foreign substances such as algae and suspended matters in seawater.

The second pre-filter 14 is a microfiltration filter that filters fine solids that have passed through the first pre-filter 13 and float in seawater.

UF membrane module 15: The UF membrane is also called an ultrafilter (Ultra Filter), and has a filtration property that does not allow various bacteria such as colon bacilli and viruses to pass therethrough.

Backwash water tank 17: a tank used for cleaning the UF membrane.

The cooling unit 20 includes a direct expansion type cooling device 21. As shown in FIG. 3, the cooling device 21 includes a compressor 211, an evaporator 212, and a control panel 213. The sterile cold seawater storage unit 30 includes a sterile cold seawater storage tank 31. The sterilizing unit 40 includes a cold seawater ultraviolet water flowing water sterilizing device 41 and a water pump 42. Sufficient heat insulating material is laid on the outer surface of the storage tank 31 to protect the seawater in the tank from cold heat.

These components are entirely controlled by a control device (not shown) provided in a control panel 50 shown in FIG. The control method will be described below.

First, the pump 12 is driven to feed the raw seawater in the raw water tank 11 to the first prefilter 13 and the second prefilter 14. The coarse water and the finely filtered seawater are further sent to the UF membrane module 15, where ultrafiltration by the UF membrane is performed.

The filtered seawater is sent to the cooling device 21 via the backwash water tank 17. Here, the seawater is cooled to the predetermined temperature and sent to the storage tank 31. The seawater stored in the storage tank 31 is sent to both the cold seawater ultraviolet water flowing sterilizer 41 and the cooler 21 by the pump 42, and returns after being sterilized and cooled, respectively.

The aseptic cold seawater stored in the storage tank 31 is pumped out as needed by a pump and used. During that time, the stored seawater is constantly sterilized and cooled, so that a certain level of quality is guaranteed for the supplied seawater temperature and sterility.

The above is the control performed in the normal operation.

On the other hand, the filters 13, 14, and 15 accumulate foreign substances and the like during use, and must be regularly maintained. Therefore, maintenance is performed in this device by the following method. First, the first pre-filter 13 and the second pre-filter 14 are removed when the pressure loss of the raw seawater (pressure difference before and after the filter) increases to a predetermined value or more, and the filter is cleaned or replaced with a spare filter. The removed filter can be reused multiple times by subjecting it to a predetermined regeneration process.

For the UF membrane module 15, two types of maintenance are performed. The first maintenance is performed at regular intervals during operation, and the above-mentioned normal operation is stopped for a short time and then performed as follows. As shown in FIG. 4, high-pressure air is blown against the UF membrane in the UF membrane module by an air blower 16 to peel off the scale adhering to the membrane, and the seawater in the backwash water tank 17 is pumped by the UF into the UF membrane. Backflow toward the membrane module. Thereby, the separation of the scale attached to the upstream surface of the UF film is further promoted, and the separated scale is discharged out of the system from the discharge port.

The second maintenance of the UF membrane module 15 is performed by stopping the normal operation after the long-term operation. In this case, by closing the valve of the outlet of the raw water tank 11 and the valve between the UF membrane module and the backwash water tank 17, as shown in Fig. 5, the chemical solution tank 19-the pump 12-the first and second pre-filters- Provide a circuit that circulates with the UF membrane module. By driving the pump 12 in this state, the cleaning solution in the solution tank 19 passes through the UF film, and at this time, the attached scale and dirt are removed. The removed scale and dirt are discharged from the discharge port as described above. At the end of this washing, the valve of the chemical solution tank 19 is closed, the valve at the outlet of the raw water tank 11 is opened, and the chemical solution in the system is washed away with seawater and discharged from the outlet. After that, return to normal operation.

[Brief description of the drawings]

FIG. 1 is a flowchart showing processing steps of an aseptic purified cold seawater producing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing a specific configuration of the aseptic purified cold seawater producing apparatus.

FIG. 3 is a front view of the same.

FIG. 4 is a flowchart showing processing steps in a first maintenance of the UF membrane module.

FIG. 5 is a flowchart showing processing steps in a second maintenance of the UF membrane module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Filtration unit 11 ... Raw water tank 12 ... Pump 13 ... 1st pre-filter 14 ... 2nd pre-filter 15 ... UF membrane module 16 ... Air blower 17 ... Backwash water tank 18 ... Pump 19 ... Chemical tank 20 ... Cooling unit 21 ... Direct expansion type cooling device 30 ... Sterile cold seawater storage unit 31 ... Sterile cold seawater storage tank 40 ... Sterilizer unit 41 ... Cold seawater ultraviolet water flow sterilizer 42 ... Pump 50 ... Control panel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rikuharu Nakanishi 2--20-15-701 Shimbashi, Minato-ku, Tokyo Nitto Seisen Co., Ltd. (72) Inventor Tsuneo Nishihara Nishikujo, Minami-ku, Kyoto-shi, Kyoto 17-3, Higashijima-cho

Claims (3)

[Utility model registration claims] 1. a) a filtration unit for removing unnecessary substances such as germs from seawater; b) a cooling unit for cooling the filtered seawater and / or seawater in a storage tank described below; An aseptic purified cold seawater producing apparatus, comprising: a storage tank for holding seawater; and d) a sterilizing section for sterilizing seawater in the storage tank. 2. The apparatus for producing aseptic purified cold seawater according to claim 1, further comprising e) a circulating water tank for cleaning the filtration unit after the filtration unit. 3. The aseptic purified cold seawater producing apparatus according to claim 1, further comprising: f) a chemical solution tank for cleaning the filtration unit.