JP3556772B2 - Ice filling rate adjustment device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ice slurry (hereinafter, referred to as IPF: Ice Packing Factor) adjusting device applied to a high-density transportation system using an ice slurry.
[0002]
[Prior art]
Recently, high-density transportation systems using ice slurries for heat transportation have been used in cooling plants such as district heating and cooling systems. Such high-density transportation systems include ice slurries for obtaining a predetermined IPF. An IPF adjustment device is used.
[0003]
FIG. 2 shows a schematic configuration of a conventional ice slurry IPF adjusting apparatus, in which an ice slurry 3 is accommodated in an ice slurry tank 1 having a stirrer 2 and the ice slurry 3 in the tank 1 is stirred by the stirrer 2. The mixed and stirred and mixed ice slurry 3 is passed through an ice slurry transfer pump 4, a first stage IPF regulator 5, a first stage IPP sensor 6, a second stage IPF regulator 7, and a second stage IPF sensor 8. Further, it is supplied to a demand destination through a main pipe 9 and an electromagnetic flow meter 10 and then returned to the ice slurry tank 1 again through a system (not shown).
[0004]
In this case, it is necessary to adjust the IPF so as to obtain a predetermined IPF with respect to a change in the amount of heat required at the demand destination. To perform the IPF adjustment, the first-stage IPF adjusters 5 and 2 are required. The first-stage bypass flow rate manual valve 11 and the second-stage bypass flow rate manual valve 12 are connected to the first-stage IPF regulator 7, respectively, and the first-stage bypass flow rate manual valve 11 and the second-stage bypass flow rate manual valve 12 are opened. By manually operating the degree while watching the instruction of the IPF meter, the flow rate returning to the ice slurry tank 1 via the bypass pipe 13 is adjusted. Further, when it is desired to increase the IPF, moisture in the ice slurry is removed by a mesh provided inside the first-stage IPF adjuster 5 and the second-stage IPF adjuster 7.
[0005]
[Problems to be solved by the invention]
However, in order to adjust the IPF of the ice slurry as described above, the opening degrees of the manual first-stage bypass flow rate manual valve 11 and the second-stage bypass flow rate manual valve 12 are adjusted while watching the instruction of the IPF meter. If the water in the ice slurry is removed by the mesh provided in the first IPF adjuster 5 and the second-stage IPF adjuster 7,
(1) In order to adjust the IPF of the ice slurry, since the bypass flow is opened and closed by the manual valves of the first-stage bypass flow rate manual valve 11 and the second-stage bypass flow rate manual valve 12, a time delay occurs in the system. IPF adjustment is not accurate, and continuous adjustment cannot be performed.
[0006]
(2) Similarly, since the manual valve is opened and closed, the IPF adjustment of the ice slurry cannot be automatically adjusted.
(3) To adjust the IPF of the ice slurry, when the bypass flow rate to the bypass pipe 13 is increased or decreased by opening and closing the first-stage bypass flow rate manual valve 11 and the second-stage bypass flow rate manual valve 12, the main flow rate is also increased. Will increase or decrease.
[0007]
(4) In order to remove the water in the ice slurry by a mesh provided inside the first-stage IPF adjuster 5 and the second-stage IPF adjuster 7 in order to increase the IPF, a mesh for removing moisture is used in a low flow rate region. Ice sticks and blocks.
There were problems such as.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an ice filling rate adjusting device that can accurately and continuously control the IPF adjustment of an ice slurry and that can automatically maintain the main flow rate constantly. The purpose is to provide.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an ice slurry tank for accommodating an ice slurry, and an ice filling rate adjusting device connected to the ice slurry tank, in which the flow rate of the ice slurry is reduced to separate ice and water. A bypass flow rate regulating valve provided in the ice filling rate regulator to regulate a bypass flow rate of water withdrawn from the ice filling rate regulator ; and an ice filling rate of the ice slurry output from the ice filling rate regulator. It comprises a sensor to be detected, and a filling rate indicating controller for setting the opening of the bypass flow rate adjusting valve with reference to the detection output of the sensor .
[0010]
According to a second aspect of the present invention, in the first aspect, the ice filling rate adjuster is formed such that the diameter of the adjuster main body is increased so as to reduce the flow rate of the ice slurry therein.
According to a third aspect of the present invention, in the first or second aspect, the ice slurry tank further includes an ice slurry transfer pump for transferring the ice slurry to an ice filling rate controller, and the amount of the ice slurry transfer pump transferred is controlled. The control is performed in accordance with the flow rate of the ice slurry output from the ice filling rate regulator.
[0011]
As a result, according to the first aspect of the invention, the opening degree of the bypass flow rate control valve connected to the ice filling rate regulator is controlled with reference to the ice filling rate of the ice slurry output from the ice filling rate regulator. As a result, the ice filling rate can be continuously and accurately adjusted, and the ice filling rate can be automatically controlled.
[0012]
According to the second aspect of the present invention, the ice filling rate adjuster is configured to increase the diameter of the adjuster body, reduce the flow rate of the ice slurry therein, and separate ice and water, Since this water portion can be bypassed by the bypass flow rate control valve, compared to the conventional device provided with a mesh for removing water in order to increase the IPF, the ice due to the adhesion of ice to the mesh in a low flow rate region. Blockage of the slurry can be prevented.
[0013]
According to the third aspect of the present invention, the amount of ice slurry transferred from the ice slurry transfer pump provided in the ice slurry tank is controlled according to the flow rate of the ice slurry output from the ice filling rate regulator. Therefore, the main flow rate can be constantly adjusted.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of an ice slurry IPF adjusting device to which the present invention is applied. In the figure, reference numeral 21 denotes an ice slurry tank. The ice slurry tank 21 has a stirrer 22. The ice slurry 23 in the tank 21 is stirred by the stirrer 22.
[0015]
An IPF adjuster 25 is connected to the ice slurry tank 21 via an ice slurry transfer pump 24. Further, the IPF adjuster 25 has a main manual valve 26, for example, an IPF sensor 27 using a capacitance system, a main pipe. 28, an electromagnetic flow meter 29 is connected to supply the ice slurry from the ice slurry tank 21 to a demand destination. The ice slurry 23 supplied to the demand destination is returned to the ice slurry tank 21 again through a system (not shown).
[0016]
In this case, the IPF adjuster 25 is formed such that the diameter of the adjuster body having a cylindrical shape is sufficiently larger than the diameter of the main pipe 28 and a bypass pipe 31 described later. water ice on the top so that to separate the bottom by a density difference between the slow to ice density of (917kg / ^{m 3)} and the density of the water (1000kg / ^{m 3).}
[0017]
A bypass flow rate control valve 30 is connected to a lower portion of the IPF regulator 25 so that the bypass flow rate control valve 30 forms a bypass flow path leading to the ice slurry tank 21 through the bypass pipe 31.
[0018]
The opening of the bypass flow control valve 30 is adjusted by an output signal 33 from an IPF indicating controller 32, so that the amount of water drawn from the inside of the IPF regulator 25 to a bypass pipe 31 is adjusted. In this case, the IPF indicating controller 32 is provided with an output corresponding to the IPF of the main pipe 28 detected by the IPF sensor 27 provided in the main pipe 28, and refers to this output to the output to the bypass flow rate regulating valve 30. The signal 33 is determined.
[0019]
On the other hand, the electromagnetic flow meter 29 is for measuring the main flow rate flowing through the main pipe 28, and a flow indication controller 34 is connected to the electromagnetic flow meter 29, and an indication signal 35 of the flow indication controller 34 is converted to an inverter 36. The driving frequency of the ice slurry transfer pump 24 is adjusted by the output signal 37 of the inverter 36 to adjust the transfer amount of the ice slurry 23 from the ice slurry tank 21.
[0020]
Next, the operation of the embodiment configured as described above will be described.
In this case, the ice slurry 23 stirred by the stirrer 22 in the ice slurry tank 21 is transferred by the ice slurry transfer pump 24 and sent to the IPF adjuster 25, and further, the main manual valve 26, the IPF sensor 27, the main pipe 28, it is supplied to a demand destination through an electromagnetic flow meter 29. The ice slurry 23 supplied to the demand destination is returned to the ice slurry tank 21 again through a system (not shown).
[0021]
In this state, in order to set the IPF high by the IPF regulator 25, the output signal 33 of the IPF indicating controller 32 is controlled so that the opening of the bypass flow control valve 30 is increased. In this case, the IPF regulator 25 has a diameter sufficiently larger than that of the main pipe 28 and the bypass pipe 31 and reduces the flow velocity in the inside thereof to reduce the ice density (917 kg / m ³ ) and the water density (917 kg / m ³ ). Due to the density difference from 1000 kg / m ³ ), the ice is separated into the upper part and the water is separated into the lower part, and the amount of bypass to the bypass pipe 31 is increased through the bypass flow control valve 30 whose opening degree is larger than that of the lower part. Therefore, the IPF is set higher.
[0022]
On the other hand, when the IPF is set to be low, the opening signal of the bypass flow control valve 30 is controlled by the output signal 33 of the IPF indicating controller 32 to be small. As a result, the amount of bypass supplied to the bypass pipe 31 via the bypass flow control valve 30 is reduced, so that the IPF is set low.
[0023]
Thus, such an opening control of the bypass flow control valve 30 uses the output signal 33 of the IPF indicating controller 32 determined with reference to the output from the IPF sensor 27 for detecting the IPF state of the main pipe 28. Therefore, the adjustment of the IPF can be performed continuously and accurately, and the automatic control of the IPF can be performed.
[0024]
On the other hand, when the IPF is adjusted by such an IPF regulator 25, if the bypass flow rate is increased or decreased due to the opening degree of the bypass flow rate adjustment valve 30, the main flow rate may be increased or decreased. The measurement output from the electromagnetic flow meter 29 for measuring the flow rate is supplied to the flow rate instruction controller 34, the instruction signal 35 from the flow rate instruction controller 34 is supplied to the inverter 36, and the output signal 37 of the inverter 36 supplies the ice slurry transfer pump 24. The main flow rate can be adjusted to be constant by adjusting the driving frequency of the ice slurry 23 to adjust the transfer amount of the ice slurry 23 from the ice slurry tank 21.
[0025]
Further, the IPF adjuster 25 is configured to increase the diameter of the IPF adjuster 25 to reduce the internal flow velocity to separate ice and water, and to bypass the water portion by the opening degree of the bypass flow rate control valve 30. As compared with the conventional system in which a mesh for removing moisture is provided to enhance the IPF, it is also possible to prevent the ice slurry from being blocked by the adhesion of ice to the mesh in a low flow rate region.
[0026]
【The invention's effect】
According to the present invention as described above,
(1) The IPF of the ice slurry can be accurately and continuously controlled.
(2) Automatic control of the IPF of the ice slurry becomes possible.
[0027]
(3) The main flow rate can be prevented from increasing or decreasing due to the increase or decrease in the bypass flow rate that occurs during the IPF adjustment of the ice slurry. That is, the main flow rate can be kept constant even if the bypass flow rate increases or decreases.
(4) Blockage of ice slurry in the IPF regulator can be prevented even at a low flow rate.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an embodiment of the present invention.
FIG. 2 is a diagram showing a schematic configuration of a conventional ice slurry IPF adjustment device.
[Explanation of symbols]
21 ... ice slurry tank,
22 ... Agitator,
23 ... ice slurry,
24 ... Ice slurry transfer pump
25 ... IPF adjuster,
26 ... Main manual valve
27 ... IPF sensor,
28… Main piping,
29 ... Electromagnetic flow meter,
30 ... Bypass flow control valve,
31 ... Bypass piping,
32 ... IPF indicating controller,
33 output signal,
34 ... Flow indication controller,
35 ... instruction signal,
36… Inverter,
37 output signal.

Claims (3)

An ice slurry tank for storing ice slurry,
An ice filling rate controller connected to the ice slurry tank and slowing down the flow rate of the ice slurry therein to separate it into ice and water;
A bypass flow rate regulating valve provided in the ice filling rate regulator to adjust a bypass flow rate of water withdrawn from the ice filling rate regulator;
A sensor for detecting an ice filling rate of the ice slurry output from the ice filling rate adjuster,
An ice filling rate adjusting device, comprising: a filling rate indicating controller for setting an opening degree of the bypass flow rate adjusting valve with reference to a detection output of the sensor . 2. The ice filling rate adjusting device according to claim 1, wherein the ice filling rate adjuster is formed such that the diameter of the adjuster main body is increased so as to slow down the flow rate of the ice slurry therein. The ice slurry tank further has an ice slurry transfer pump for transferring the ice slurry to the ice filling rate controller. The ice filling rate adjusting device according to claim 1, wherein the device is controlled.

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