JP3151633B2 - Ice water slurry removal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of extracting a fixed amount of ice water slurry (hereinafter referred to as IPF) from a storage tank.

[0002]

2. Description of the Related Art Since ice water slurry stored in a storage tank is separated, if the slurry is simply pumped out from the side of the storage tank, the IPF is low and the IPF is low.
Is not constant. In particular, when the storage tank is provided in a small room such as a double slab under the building, the height of the tank is limited, and the storage tank itself has a small height dimension and a large horizontal dimension. Therefore, the problem easily occurs as described above.

[0003]

SUMMARY OF THE INVENTION The present invention has been made on the background of the prior art as described above, and an object of the present invention is to provide a method of removing an ice water slurry of a constant IPF from a shallow storage tank. Is to provide.

[0004]

Extraction method of ice-water slurry of the present invention capable of achieving the object of the Means for Solving the Problems] is a strip-like ice to the stirring center stirred ice water slurry in the storage tank
Assemble and collect the collected strips of ice above the storage tank.
And then feed the flake ice into the mixing tank,
When water is supplied to the mixing tank to regenerate the ice water slurry,
In addition, after controlling the supply amount of water and / or flake ice to form an ice-water slurry having a constant ice mixing amount, the slurry is supplied to a slurry pump.
It is characterized by being transmitted more .

[0005] By transporting the ice taken out of the storage tank and the amount of water to be mixed with the ice to the cold heat consuming zone while controlling it, a constant IPF ice-water slurry can be taken out.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a shallow storage tank having a diameter D several times to several tens times larger than the height H. Ice i is supplied.

Further, a stirring blade 3 as stirring means is provided in the tank 1. The stirring blade 3 is attached to a lower end of a screw shaft 4 driven by a motor 5. A cylinder 6 is provided outside the screw shaft 4, and forms a screw conveyor 7 together with the screw shaft 4. On the other hand, reference numeral 8 denotes a mixing tank, which is connected to the screw conveyor 7 via a duct 9. Reference numeral 10 denotes a water pump, which supplies the water w in the tank 1 to the mixing tank 8 by the pump 10. 11 is a slurry pump,
The pump 11 causes the ice water slurry S in the mixing tank 8 to flow through the slurry pipeline 13A into the cold heat consuming zone 1.
2. This cold heat consumption zone 1
The water w discharged from 2 is returned to the ice making device 2 via a pipeline 13B, and a part thereof is returned to the tank 1 via a pipeline 15 as desired.

[0008] 14 is a slurry pipeline 13A
In a IPF meter provided so as to control the screw conveyor drive motor 5 and a valve 16 provided in the water pump system pipes of this IPF meter 14. As shown in FIG. 2, the IPF meter 14 includes a hollow tube 21 having a closed end, five thermocouples 22, and four heaters 23. By measuring the degree of temperature rise of the slurry S with five thermocouples 22, the IPF of the ice water slurry S is measured.
Can be measured.

In the above-mentioned tank 1, a piece of ice i supplied from the ice making device 2 and water formed by melting the ice i,
Alternatively, a part of the water w returned from the cool / heat consumption zone 12 is mixed, but when the stirring blade 3 is rotated by the motor 5, the ice i gathers at the center of the tank 1. Tank 1
Is collected by the screw conveyor 7 and supplied to the mixing tank 8 through the duct 9.

On the other hand, the water w in the tank 1 is pumped up by the water pump 10 and supplied to the mixing tank 8, where it is mixed with ice i to form an ice water slurry S. This ice water slurry S is supplied to the cold heat consuming zone 12 by the slurry pump 11. At this time, the IPF of the ice water slurry S is measured by the IPF meter 14, and when the value is higher than the target value or the set value, the opening of the valve 16 is increased and the rotation speed of the screw shaft 4 is reduced. . Conversely, when the IPF value is low, the opening of the valve 16 is reduced and the rotation speed of the screw shaft 4 is increased. Thus, the ice water slurry S having a constant IPF is supplied to the cold heat consuming zone 12.

As the above-mentioned stirring means, a nozzle may be used instead of the stirring blade. That is, as shown in FIG. 3, a large number of nozzles 17 are arranged in the tank 1 in a tangential direction of the tank 1, and the water in the tank 1 pumped by the pump 18 is jetted from the nozzles 17, so that The ice water slurry can be rotated. As a means for removing ice, a special pump or scraping device can be used instead of the screw conveyor. Further, in the above description, the control of the valve 16 and the screw shaft 4 was performed, but only the rotation of the screw shaft 4 or the control of the valve 1
Control of only 6 may be performed.

[0012]

According to the present invention as described above, the present invention is, strip-shaped in the stirred central stirred ice water slurry in the storage tank
Ice is collected and the collected pieces of ice are collected above the storage tank.
To the mixing tank, and then supply the ice
Then, water is supplied to the mixing tank to regenerate the ice water slurry.
Together, after water and / or the feed rate of the strip of ice is controlled to ice mixed amount constant ice slurry, the slurry Pont
Since delivery by flop can and eject from the shallow bottom of the tank the IPF constant ice water slurry continuously. As a result, constant cold can be sent to the cold heat consuming zone.
Also, the flow of the slurry in the slurry pipeline is stabilized (prevention of clogging) .

[Brief description of the drawings]

FIG. 1 is an overall view of an apparatus for carrying out a method of the present invention.

FIG. 2 is a sectional view of an IPF meter.

FIG. 3 is an explanatory view showing another example of the stirring means.

[Explanation of symbols]

 1 Storage Tank 8 Mixing Tank 12 Cold Energy Consumption Zone 12 i Ice S Ice Water Slurry w Water

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25C 5/00 F25C 1/00 F24F 5/00

Claims (1)

(57) [Claims] 1. A by assembling strips shaped ice stirring to the stirred around the ice slurry in the storage tank, fine was set
Remove the flakes of ice above the storage tank and then
Ice is supplied to the mixing tank, and water is further supplied to the mixing tank to regenerate the ice water slurry, and the water and / or fine water is supplied.
A method for removing ice water slurry , comprising: controlling the supply amount of flake ice to form an ice water slurry having a constant ice mixing amount;