JP2000262807A - Liquid separation discharge device and liquid separation discharge method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel liquid separation / discharge device and a liquid separation / discharge method capable of detecting the liquid level of two or more kinds of liquids vertically separated and automatically separating and discharging each of them. SOLUTION: A water tank 1 into which a mixture of two or more liquids having different specific gravities and viscosities flows into each other, and discharge lines 2a and 2b for discharging an upper liquid and a lower liquid separated in the water tank 1 respectively, Rotary viscometers 3a and 3b that detect the liquid level height of the upper layer liquid and the liquid level of the lower layer liquid by changes in the number of revolutions or rotational resistance of the respective rotors, and are detected by the rotary viscometers 3a and 3b. A control unit 5 for controlling the opening and closing of the valves 4a and 4b of the discharge lines 2a and 2b in accordance with the liquid level of each of the separated liquids.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing water and oil from a dry distillation furnace of a municipal refuse treatment facility or a metal and slag of an ash melting furnace, which have different specific gravities and viscosities.
The present invention relates to a liquid separation / discharge device and a liquid separation / discharge method for respectively separating and discharging two or more types of liquids which are vertically separated.

[0002]

2. Description of the Related Art
As a method of separating and discharging a liquid mixture of two or more types of liquids having different specific gravities, such as water and oil, the liquid mixture is temporarily stored in a water tank or the like, and separated into layers vertically, and then each is separated. A method is generally known in which a discharge line having a discharge port is provided in a liquid layer, and each liquid is separately discharged from each of the discharge lines by a pump or the like. Further, in such a separation and discharge method, in order to detect each liquid level, a float having a substantially specific gravity of each liquid vertically separated into layers is put into a transparent water tank, and the height of the float is set. The liquid level of each liquid is detected by visually checking the position from the side of the water tank or the like.

[0003] Therefore, in the conventional liquid separation and discharge method, an operator visually checks the height position of the float and checks the liquid level of each liquid, and manually or alternately simultaneously discharges each liquid from each discharge line. It will be discharged by work.

However, in such a conventional method,
It can be used only when the liquid is almost transparent so that the height of the float can be seen from outside through the water tank, and when the float position is dark liquid (tar etc.) or the water tank itself is not transparent. Has the disadvantage that it cannot be applied. In addition, in the case of this method, there is a problem that as the size of the water tank increases, the float becomes more and more difficult to see and the recovery thereof is not easy. Further, when the target liquid is an extremely high-temperature liquid such as metal and slag coming out of an ash melting furnace, a float that can withstand this temperature is not found, and an operator cannot approach the liquid. It is impossible. In addition, since the control of the discharge of each liquid is performed by the labor of an operator, the efficiency is low and automation is desired.

Accordingly, the present invention has been devised in order to effectively solve such a problem, and a main object of the present invention is to separate two or more kinds of mixed liquids which are separated into upper and lower layers and to automatically separate them. It is intended to provide a novel liquid separation / discharge device and a liquid separation / discharge method capable of discharging.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a water tank into which a mixed liquid composed of two or more liquids having different specific gravities and viscosities flows, and an upper layer vertically separated inside the water tank. A discharge line for discharging the liquid and the lower liquid, respectively, and located in the water tank, and the liquid surface height of the upper liquid and the liquid surface height of the lower liquid are changed by changing the rotation speed or rotation resistance of each rotor. It comprises a rotary viscometer for detecting, and a control unit for controlling opening and closing of the valves of the respective discharge lines in accordance with the liquid level of each separated liquid detected by the rotary viscometer. Then, using such a liquid separation and discharge device, when the liquid level of the upper liquid and the lower liquid separated in the water tank reaches the rotor of each rotary viscometer, the valve of each of the discharge lines is discharged. Is opened to discharge each of the separated liquids, and thereafter, when the liquid levels fall below the level of the rotor, the valves of the respective discharge lines are closed to stop the discharge.

That is, the present invention focuses not only on the specific gravity difference between the upper liquid and the lower liquid, but also on the viscosity difference, and detects the difference in the viscosity with a rotary viscometer to grasp the liquid level of each liquid. In addition, the valve of the discharge line for each liquid is controlled to open and close according to each liquid level detected by the rotary viscometer.

[0008] This makes it possible to easily and accurately detect the liquid level of not only a transparent liquid as in the past but also a dark liquid such as tar or a high-temperature liquid such as molten metal / slag. Separate discharge control of each liquid can be performed automatically.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a liquid separating apparatus according to the present invention.

As shown in the figure, this liquid separating apparatus comprises a mixed liquid composed of two types of liquids having different specific gravities and different viscosities.
For example, a water tank 1 into which water and oil or tar, slag and molten metal, etc. flow, and a discharge line 2 for discharging the upper liquid and the lower liquid separated in the water tank 1 respectively.
a, 2b, rotary viscometers 3a, 3b for detecting the liquid level of each of the separated liquids, and liquid surfaces of the separated liquids U, L detected by the rotary viscometers 3a, 3b, respectively. The valve 4 of each of the discharge lines 2a and 2b according to the height
The control section 5 mainly controls the opening and closing of the switches a and 4b.

The rotary viscometers 3a and 3b are each provided with a rotor (propeller) 6 which rotates in the separated liquid in the water tank 1.
And a pipe-shaped support rod 7 that vertically supports the rotor 6, and a driving unit 8 that supports the support rod 7 and drives the rotor 6 to rotate. A change in rotation speed or rotation resistance due to the difference, that is, a torque that changes to keep the rotation speed constant, is detected to detect the liquid level of each separated liquid, and the liquid level detection signal is input to the control unit 5 respectively. It has become.

The discharge lines 2a and 2b are vertically connected to the side of the water tank 1, that is, the discharge line 2a is connected to the bottom of the water tank 1, and the discharge line 2b is connected to the middle part of the water tank 1, more specifically, the rotary type. The viscometer 3a is connected to a position above the rotor 6 on the side of the viscometer 3a, and separates the separated liquid vertically separated from the viscometer 3a through respective discharge lines 2a and 2b. Further, the valves 4a and 4b provided on the discharge lines 2a and 2b are configured to respond instantaneously, for example, such as electromagnetic valves, and the respective discharge lines 2a, 2b are controlled by a control signal from the control unit 5. 2b is opened and closed instantaneously to stop the discharge of each separated liquid.

Reference numeral 9 in the drawing denotes a supply line for supplying the above-mentioned mixed liquid, which is supplied from the bottom side of the water tank 1 into the water tank 1 to promote separation of the mixed liquid after the supply. It has become.

Next, an example of the method of the present invention will be described using the liquid separating / discharging apparatus having such a configuration.

First, each valve 4a, 4b of each discharge line 2a, 2b is closed, and each rotary viscometer 3a, 3b
After the rotors 6 and 6 are driven to rotate, mixed liquids composed of two kinds of liquids having different specific gravities and different viscosities are continuously poured into the water tank 1 from the supply line 9.
Then, the mixed liquid is separated into layers vertically in the water tank 1 due to the difference in specific gravity, and their liquid levels gradually rise.

When the liquid level of the upper layer liquid first reaches the level of the rotor 6 of the rotary viscometer 3a located in the lower part of the water tank 1 by the rise of the liquid level, the rotor 6 However, at this time, the control unit 5 receives the detection signal, and the discharge line 2a,
The valves 4a and 4b of 2b are kept closed without being controlled.

Next, the liquid level of each of the separated liquids further rises in this way to reach the level of the rotor 6 of the rotary viscometer 3b in which the liquid level of the upper layer liquid is located above, and the rotor As shown in FIG. 2, when the rotation speed of the motor 6 is increased, the controller 5 detects this, determines that the liquid level has reached the upper limit, opens the valve 4b of the discharge line 2b in the middle stage, and opens the discharge line 2
Part of the upper liquid is discharged from b. As a result, the liquid level of the upper layer liquid drops, and only the upper layer liquid can be separated and discharged from the discharge line 2b to the outside of the water tank 1. If the rotor 6 of the rotary viscometer 3b is exposed on the liquid surface and the torque decreases with the decrease of the liquid level of the upper layer liquid, the control unit 5 detects this again, and When it is determined that the level has dropped, the valve 4b of the discharge line 2b is closed to stop discharging the upper layer liquid. Thereafter, if the liquid level of the upper layer liquid rises again, the discharge line 2b
By repeating the opening and closing control of the valve 4b, only the upper layer liquid can be effectively separated and discharged from the discharge line 2b to the outside of the water tank 1.

On the other hand, the liquid level of the lower layer liquid also rises with the rise of the upper layer liquid, and reaches the vicinity of the discharge line 2b.
When the rotor 6 reaches the rotor 6a, the torque of the rotor 6 further changes due to the difference in viscosity between the upper liquid and the lower liquid, thereby detecting that the rotor 6 has reached that level. Then, as shown in FIG. 3, the control unit 5 that has received the level signal opens the valve 4a of the discharge line 2a and discharges the lower layer liquid from the discharge line 2a. Suppressed middle discharge line 2b
It is no longer discharged from the side and the tank 1
Only the lower layer liquid can be separated and discharged out of the water tank 1 from the inside. Thereafter, if the liquid level of the lower layer liquid drops and the rotation speed of the rotor 6 of the rotary viscometer 3a increases, the control unit 5 detects this and closes the valve 4a of the discharge line 2a. As a result, the discharge of the lower layer liquid is stopped. Then, similarly to the upper liquid, by controlling the opening and closing of the valve 4b of the discharge line 2b according to the liquid level of the lower liquid, only the upper liquid can be separated and discharged from the discharge line 2b to the outside of the water tank 1. .

As described above, the present invention focuses not only on the difference in specific gravity between the upper liquid and the lower liquid, but also on the viscosity difference, and detects the difference in the viscosity by two rotary viscometers to detect the liquid difference of each liquid. Since the level is detected and the valve of the discharge line is controlled to open and close according to the detected liquid level, liquid separation and discharge can be performed automatically without relying on the labor of the operator. it can. In addition, since the liquid level is detected by a rotary viscometer, the liquid level is not only a transparent liquid as in the past, but also a dark liquid such as tar and a high-temperature liquid such as molten metal / slag. Even so, it is possible to easily and accurately detect the liquid level and perform accurate separation and discharge control.

In this embodiment, an example has been described in which a mixed liquid composed of two kinds of liquids having different specific gravities and viscosities is separated and discharged. However, a mixed liquid of three or more liquids having different viscosities and specific gravities is shown. Even if the above-mentioned rotary viscometers and discharge lines are installed with different installation heights according to the number thereof, it is possible to automatically and reliably separate and discharge each liquid in the same manner as described above. It becomes possible.

[0022]

In summary, according to the present invention, the detection and the separation and discharge of each liquid level of a mixture of two or more liquids can be performed automatically and reliably without relying on the labor of an operator. Since the liquid level is detected by a rotary viscometer, the liquid level is not only a transparent liquid as in the past, but also a dark liquid such as tar or a high-temperature liquid such as molten metal / slag. However, excellent effects such as easy and accurate detection of the liquid level and accurate separation / discharge control can be achieved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a liquid separation and discharge device according to the present invention.

FIG. 2 is a conceptual diagram showing one embodiment of a liquid separation method using the liquid separation / discharge device according to the present invention.

FIG. 3 is a conceptual diagram showing one embodiment of a liquid separation method using the liquid separation and discharge device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 Water tank 2a, 2b Discharge line 3a, 3b Rotary viscometer 4a, 4b Valve 5 Control unit 6 Rotor 7 Support rod 8 Drive unit 9 Supply line

Continued on the front page (72) Inventor Shun-ichiro Ueno 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Pref. Ishikawajima-Harima Heavy Industries Co., Ltd. Ishikawashima Harima Heavy Industries, Ltd. Technical Research Laboratory F-term (reference) 4D051 AA01 BA07 BA09

Claims (2)

[Claims] 1. A water tank into which a mixture of two or more liquids having different specific gravities and viscosities flows, a discharge line for discharging an upper liquid and a lower liquid separated in the water tank, and a discharge line for the upper liquid A rotary viscometer that detects the liquid level height and the liquid level height of the lower layer liquid by a change in the rotation speed or rotational resistance of a rotor having different installation heights, and each separated liquid detected by the rotary viscometer. A control unit for controlling the opening and closing of the valves of the respective discharge lines in accordance with the liquid level of the liquid. 2. The liquid separating method using the liquid separating apparatus according to claim 1, wherein the liquid levels of the upper liquid and the lower liquid separated in the water tank reach the rotors of the respective rotary viscometers. Open the valves of the respective discharge lines to discharge the respective separated liquids, and then close the valves of the respective discharge lines to stop the discharge when the respective liquid levels fall below the level of the rotor. A liquid separation and discharge method, characterized in that: