JP2564243B2 - Liquid continuous mixing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous liquid mixing device.
More specifically, the present invention relates to a device that accurately mixes liquids having a high mixing ratio with a simple configuration that does not use a metering pump.

[0002]

2. Description of the Related Art In the case of mixing liquids having a high mixing ratio, for example, in the production of emulsion fuel, when a water component to be added to fuel oil is prepared by mixing an emulsifier with water, the conventional method has been used.
As described in JP-A-19338, the emulsifier in the emulsification tank is fed into the water sent from the water supply tank to the mixing tank by a water supply pipe by a metering pump to mix the water and the emulsifier.

However, in the case of mixing using a metering pump, if the apparatus is expensive, and it is difficult to finely adjust the mixing ratio, and if the mixed liquid easily separates or precipitates,
There is a problem that the tank must be provided with a stirring member.

[0004]

The continuous liquid mixing apparatus according to the present invention has been made to solve this problem, and sends a fixed amount of the mixed liquid into the mixed liquid without using a metering pump. It is an object of the present invention to provide a device capable of continuously performing high-magnification mixing with an accurate mixing ratio and preventing the mixed liquid that easily separates or precipitates by circulation.

[0005]

In order to solve the above-mentioned problems, in a liquid continuous mixing apparatus according to the present invention, a first conduit for feeding a liquid to be mixed from a tank having a small liquid level change to a tank of the mixed liquid by a drop. A circulation pipe for circulating the mixed liquid; a second pipe for sending the mixed liquid from the circulation pipe to the joining portion of the first pipe; and a pipe upstream of the joining portion of the first pipe and the second pipe. A configuration is adopted in which two adjusting valves are provided in the passage for adjusting the feed amount of the mixed liquid and the mixed liquid.
And the mixture to be sent to the mixed liquid tank.
Adopt a configuration that provides a circulation line for circulating a part of the liquid
Preferably.

[0006]

In the liquid continuous mixing apparatus according to the present invention having the above-described structure, the flow rate of the first pipeline and the flow rate of the second pipeline are adjusted by the adjusting valve so as to obtain a desired mixing ratio, and If the electromagnetic valves of the one pipeline and the second pipeline are opened at the same time, when the liquid to be mixed flows down the first pipeline, the mixed liquid circulating in the circulation pipeline will flow from the second pipeline to the joining section. It is added to the liquid to be mixed and mixed with it to form a mixed liquid having an accurate mixing ratio and stored in the tank.

Further, in this apparatus, since the mixed liquid circulates through the circulation line, even if the mixed liquid is a substance that easily separates or precipitates, it is prevented from being separated or precipitated by the stirring action of the circulation. Therefore, it is not necessary to provide a stirring member in the mixed liquid tank.

[0008]

Embodiments of the liquid continuous mixing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing each constituent member of the liquid continuous mixing apparatus according to the present invention and its connecting pipeline.

In FIG. 1, reference numeral 1 denotes a tank for liquid to be mixed, which is installed at a higher position than a tank for mixed liquid, which will be described later, so that the liquid is fed by a drop. 2 or the electromagnetic valve 4 which operates by detecting the liquid level of the electrode rod 3 automatically replenishes the liquid to be mixed, and always keeps the liquid level within a certain range.

Reference numeral 5 is a first pipe line for sending the liquid to be mixed by a drop from the tank 1 for the liquid to be mixed into the tank for the liquid to be described later.
A pipe having a diameter through which a required amount of the liquid to be mixed or more flows is used, and in this pipe line 5, an adjusting valve 6 for adjusting the flow rate to a required value and a pipe line 5 are provided.
A solenoid valve 7 for opening and closing is provided, and this conduit 5 is provided with a mixing liquid joining portion 8 which is shown in the form of an open container in FIG.

A mixed liquid tank 9 sucks the contained mixed liquid from its lower portion by a pump 10 and holds it above the mixed liquid joining portion 8 provided in the first conduit 5. Circulation line 1 for the mixed liquid returned to the tank 9 through the tank 11.
2, the circulation line 12 has a concentration of mixed liquid,
A pressure adjusting valve 13 for adjusting the liquid pressure according to the viscosity or the like to ensure the feeding and a pressure gauge 14 for displaying the pressure set by the adjusting valve 13 are provided, and the pump is also provided. A relief valve 15 is provided on the discharge side of 10 to return a part of the mixed liquid to the tank 9 when the discharge side pressure becomes equal to or higher than a set pressure.

Reference numeral 16 is a second conduit for sending the mixed liquid from the holding tank 11 to the mixing liquid joining section 8. In this conduit 16, an adjusting valve 17 for adjusting the flow rate to a required value and a conduit 16 are provided. And a solenoid valve 18 for opening and closing.

Reference numeral 19 denotes a mixed liquid tank for sending and storing the mixed liquid in which the mixed liquid and the mixed liquid are mixed at a predetermined mixing ratio by the first pipe line 5. The electrode rod 20 for detecting the liquid level of the mixed liquid is provided, and when the electrode rod 20 detects the lower limit of the liquid level, the first conduit 5 described above is provided.
The electromagnetic valve 7 and the electromagnetic valve 18 of the second pipeline 16 are simultaneously opened to supply the liquid to be mixed and the liquid to be mixed, and when the electrode rod 20 detects the upper limit of the liquid level, The mixing liquid is stopped by stopping the supply of the mixing liquid and the mixing liquid.

Reference numeral 21 denotes a pump 2 from the mixed liquid tank 19
2 is a delivery pipe line for sending out the mixed liquid, and a relief valve 23 is provided in the middle of the delivery pipe line so that the relief valve 23 is opened under normal pressure to open a pipe line 24.
A part of the mixed liquid is returned to the tank 19 by means of the pipe line 21 and the pipe line 24 for circulating the part of the mixed liquid, and the circulation line causes the separation and the precipitation of the mixed liquid. Try not to.

Numerals 25 and 26 are heaters respectively provided in the mixed liquid tank 1 and the mixed liquid tank 19, and when the liquid temperature above normal temperature is required, the liquid is heated by the heaters. It is unnecessary if the liquid temperature of
An external type can also be used for this.

When the liquids are mixed by the continuous liquid mixing device described in the above embodiment, the tank 1 is supplied with a fixed amount of the liquid to be mixed and the tank 9 is supplied with a fixed amount of the liquid, and the pump 10 of the circulation line 12 is supplied. Is operated to circulate the mixed liquid, the pressure in the pipe 12 is adjusted by adjusting the adjusting valve 13 so as to match the concentration (viscosity) of the mixed liquid, and the adjusting valve 6 in the first pipe 5 and By adjusting the adjusting valve 17 of the two conduits 16 to set the flow rates of the liquid to be mixed and the mixed liquid to a desired mixing ratio, the electromagnetic valve 6 of the first conduit 5 and the electromagnetic valve of the second conduit 16 are set. When the valve 18 is opened, the liquid to be mixed and the liquid to be mixed are sent out at a set flow rate and merge at the joining portion 8, and are sent to the tank 19 of the mixed liquid by the first conduit 5 to meet the desired value. Is accurately mixed in the ratio of and is stored in the tank 19.

When the mixed liquid is stored in the tank 19 as described above, the pump 22 is operated to send the mixed liquid from the delivery pipe 21 to the next processing step. This delivery amount balances with the mixing amount. If so, the mixing operation is continuously performed, so that the mixing operation is continuously performed. However, when the delivery amount is less than the supply amount, when the amount of the mixed liquid in the tank increases and reaches the upper limit, the electrode rod 20 detects this and the solenoid valve 7
The mixing is stopped to close the electrodes 18 and 18, and when the amount of the mixed liquid is reduced and reaches the lower limit by the delivery of the mixed liquid, the electrode rod 20 detects this and opens the electromagnetic valves 7 and 18 to start the mixing. In this case, the mixing operation is performed intermittently.

During the continuous or intermittent mixing operation described above, the mixed liquid continues to circulate in the circulation pipe 12 and is subjected to the stirring action, so that even if the substance is liable to separate or precipitate, Since precipitation is prevented and the whole is kept in a homogeneous state, the state of dispersion in the liquid to be mixed is very good.

[0020]

As described above, the continuous liquid mixing apparatus according to the present invention is capable of continuously and accurately mixing liquids having a high mixing ratio by a simple and inexpensive device that does not use a metering pump. Is very accurately determined, and since the mixed liquid is circulated in the circulation line, it is possible to completely prevent separation and precipitation of the mixed liquid without providing a stirring member.

[Brief description of drawings]

FIG. 1 is a schematic view showing each constituent member of a liquid continuous mixing apparatus according to the present invention and a connecting conduit thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Tank for liquid to be mixed 5 First pipe 6 Adjustment valve 8 Addition part for mixed liquid 12 Addition part for mixed liquid 16 Second line 17 Adjustment valve

Claims (2)

(57) [Claims] 1. A tank (1) in which the liquid to be mixed does not significantly change in liquid level.
First line to send to mixed liquid tank (19) by drop from
(5) and a circulation line (12) for circulating the mixed liquid,
The mixed liquid is fed from the circulation line (12) to the first line.
The second pipeline (16) sent to the joining section (8) of (5), and the upstream side and the second pipeline (1 ) from the joining section (8) of the first pipeline (5).
6. A continuous mixing device for liquid, comprising: adjusting valves (6) and (17) provided in 6) for adjusting the feed amount of the mixed liquid and the mixed liquid. 2. A circulation line (21) for circulating a part of the mixed liquid to be sent out to the mixed liquid tank (19 ).
(24) is provided, The continuous mixing device of the liquid of Claim 1 characterized by the above-mentioned.