JP3174656B2 - Liquid dispensing equipment - 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 dispensing apparatus.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional liquid dispensing apparatus. FIG. 2 shows a process diagram for producing a raw material of a carbonated beverage using sugar water as a conventional example. FIG.
In, the dissolved sugar water is transported by a tank trolley or the like and stored in the sugar tank 51. The stored liquid is put into the simple tank 52 having the load cell 57 as a weight measuring device together with the treated water and the sugar measured by the load cell 57, and is stirred by the stirrer 58. Further, this stirred mixture is mixed with the stock carbonated beverage in the mixing tanks 54 and 55 via the filter 53. Then, after cooling to a predetermined temperature, carbon dioxide is absorbed and the filler 56
Is filled into the container. As is clear from the above, the stirred mixed solution of sugar is obtained by weighing sugar, treated water and the liquid in the liquid sugar tank with a load cell and then stirring. Further, the solution and the stock solution are stirred in a mixing tank. That is, in order to dissolve in a batch system and to reduce the number of times of dissolution, the amount of stirring and mixing used in one day is performed.

[0003]

However, when the undiluted solution and the agitated mixed solution are batch-processed as described above, there are the following inconveniences. (1) It takes a lot of time to produce a bottled liquid. That is, it takes a lot of time to transfer to the next tank after charging, dissolving and stirring time in each step, and processing. (2) Since an amount to be used in one day is stored in the mixing tank, a large tank needs to be installed, and a great burden is imposed on securing an installation place and increasing equipment costs. (3) A large number of personnel are required for transportation and input of sugar bags and the like. (4) It is not easy to manufacture a small lot, and it is not possible to manufacture a product with a changed mixing ratio. Therefore, in order to solve these problems, it has been proposed to use a continuous liquid dispensing apparatus. However, in the case of a continuous liquid dispensing apparatus, strict monitoring of the flow rate and the like requires quality control. Was needed. The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a liquid dispensing apparatus capable of accurately monitoring a mixing amount of a stock solution, a mixing ratio, and a set ratio of raw materials.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a continuous liquid dispensing apparatus for mixing a stock solution and a mixed solution, wherein the stock solution tank is provided with a weight measuring device and controlled from the stock solution tank via a mass flow meter. And a control device for comparing the measured value of the weighing device with the value of the mass flow meter, and also controls the mixed liquid amount from the buffer tank via the mass flow meter. A fixed amount pump, and a fixed amount solution pump in which the amount of the undiluted solution is controlled from the undiluted tank via a mass flow meter, a mixer for mixing the liquids from the pumps, and a mass flow meter provided at the outlet of the mixer. , A control device for comparing and calculating the total value of the mass flow meter and the value of the same mass flow meter. Liquid flow rate The integrated value of the mass flow meter to be measured, and the measurement value of the weighing device that measures the flow rate of the undiluted solution from the undiluted solution tank, when the value of the mixed solution amount and the undiluted solution amount is equal to or greater than a preset value, The control is performed by changing the set ratio of the raw materials, and this is used as a means for solving the problem.

[0005]

According to the present invention, the weight of the undiluted solution tank is measured by a weighing device by the above-mentioned means, and the discharge amount is measured by a mass flow meter. Then, by comparing the measured values, the flow rate is monitored, and in particular, the mixing amount of the undiluted solution is accurately monitored. A metering pump controlled from a sugar solution tank via a mass flow meter; a metering solution pump controlled from a stock solution tank via a mass flow meter; a mixer for mixing the liquid from each of the pumps; A mass flow meter provided at the outlet of the vessel, and a control device for comparing the total value of the mass flow meter and the value of the mass flow meter, measuring the mass of each liquid, and measuring the total value of the same value. Monitor whether it matches the total mass of the liquid,
That is, the ratio of the undiluted solution and the mixed solution is accurately monitored. Further control the ratio of the stock solution flow rate to the mixed solution flow rate, the integrated value of the mass flow meter that measures the mixed solution flow rate from the buffer tank, and the measurement value of the weight measuring device that measures the stock solution flow rate from the stock solution tank In the method of controlling the ratio of the amount of the undiluted solution to the amount of the mixed solution by changing and controlling the set ratio of the raw material when the amount of the mixed solution and the amount of the undiluted solution are equal to or more than a preset value, The amount of the undiluted solution is compared with the amount of the mixed solution.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. First, in FIG.
The dissolved sugar water is transported by a tank trolley or the like, and stored in a liquid sugar tank (not shown). Then, the stored liquid is put into a simple tank (not shown) at the next stage provided with a load cell as a weight measuring device together with the treated water and the sugar measured by the load cell, and is stirred by a stirrer. The simple liquid (mixed liquid) from the tank is sent to the buffer tank 1 with the liquid level controlled. The liquid in the buffer tank 1 is measured by a density meter 2 and sent to a mixer (static mixer) 6 via a mass flow meter A by a metering pump (snake type) 3. The amount of the mixed liquid is set to a value that matches the production amount, and feedback control is performed by a control device (not shown) by the output of the mass flow meter A via the metering pump 3.

On the other hand, a stock solution such as a fragrance is previously dissolved in a stock solution tank 10a having a load cell 11a as a weight measuring device, and sent to the static mixer 6 via a fixed stock solution pump 8a and a mass flow meter Ba. Similarly, a stock solution tank 10b of a dye or the like also has a load cell 11b as a weighing device.
Is dissolved and stirred in the stock solution tank 10b provided with the above, and sent to the static mixer 6 via the fixed stock solution pump 8b and the mass flow meter Bb. The flow rates of the fixed stock solution pumps 8a and 8b may be set individually to a predetermined value for the mixed liquid amount to the buffer tank 1, or a ratio control method for the mixed liquid amount may be set. May be adopted. Regardless of which of these methods is adopted, the rotation speed control of each of the constant-quantity undiluted solution pumps 8a and 8b is performed by feedback control by a control device (not shown) via outputs of the mass flow meters Ba and Bb. . In addition, if the ratio control method for the mixed liquid amount is specifically shown, when the mixed liquid amount is F, the flow ratios r1 and r2 of each stock solution tank are given, and each flow rate is F × r
1, F × r2. Further, the integrated value of the mixed solution is measured by the mass flow meter A, and the remaining amount of each stock solution flow rate is determined by the load cell 11.
It is also possible to control so as to change the flow ratios r1 and r2 of the undiluted solution when there is an error equal to or more than a predetermined value measured at a and 11b.

[0008] In order to easily wash the undiluted solution pumps 8a and 8b, the mass flow meters Ba and Bb, and the like, they are connected to the discharge side of the metering pump 3 by pipes 13a and 13b. On the outlet side of the static mixer 6, a density meter 15, an absorbance meter 16, and a conductivity meter 17 are provided to control the quality of the mixture such as the concentration, the dye, and the acid concentration. Further, a mass flow meter C is provided, and each of the mass flow meters A, Ba, Bb is provided.
To monitor the calculation error and the like, and when the calculation error becomes equal to or greater than a preset value, an alarm is issued. Then, the liquid from the static mixer 6 is monitored by each of the above-mentioned instruments, and then, a pair of cushion tanks 20a, 20
0b. In addition, a liquid is sent from each of the tanks 20 and 20b to a filler (not shown) via a pump 21 and filled. It should be noted that the devices are arranged at a higher position toward the upstream side so that the cleaning liquid does not remain from the upstream side toward the downstream side.

In the liquid dispensing apparatus having the above-described configuration, the fixed amount pump 3 for supplying the mixed liquid, the fixed amount undiluted solution pumps 8a,
The rising timing of 8b is sequence-controlled in accordance with a predetermined process. Then, whether or not the discharge amount of the undiluted solution is normal is determined by the load cells 11a and 11b of each tank.
Is compared with the integrated value measured by the mass flow meters Ba and Bb within a predetermined value. If the value is equal to or more than the predetermined value, an alarm is issued assuming that some abnormality has occurred. Next, the mass flow meters A, Ba,
The sum of Bb is compared with the value of the mass flow meter C that measures the total mass after mixing. By this comparison, it is possible to monitor the flow rate of the stock solution relative to the mixture (sugar water),
An abnormality can be detected at an early stage. In addition, a density meter,
Abnormality can also be detected by an absorbance meter, a conductivity meter, or the like. The integrated value of the mass flow meter A and the load cell 1
With the values of 1a and 11b, the ratio of the stock solution can be monitored. When the stock ratio exceeds a preset value, control is performed so as to change the set ratios r1 and r2 of the flow ratio of each stock solution tank. Is also possible. In addition, the cleaning pipes 13a, 13
By using the liquid 3b, the liquid to be sent from the pump 3 is used for the fixed amount undiluted solution pumps 8a and 8b and the flow meters Ba and Bb.
The mixer 6 and the like can be easily washed.

[0010]

As described above in detail, according to the liquid dispensing apparatus of the present invention, the value obtained by comparing the value measured by the load cell, which is the weight measuring device of each tank, with the integrated amount measured by the mass flow meter is obtained. If the value is equal to or greater than the specified value, it is judged that there is some abnormality in the monitoring of the undiluted solution, and an alarm is issued.The sum of each mass flow meter and the value of the mass flow meter that measures the total mass after mixing By comparing with the above, the flow rate of the stock solution with respect to the mixed solution (sugar water) can be accurately monitored, and the occurrence of abnormality can be detected at an early stage. Also, based on the integrated value of the mass flow meter and the measurement value of the weighing device, when the value of the mixed solution amount and the stock solution amount exceeds the set value, it is possible to control by changing the set ratio of the stock solution. Formula mixing can be accurately performed. Therefore, various disadvantages in the conventional batch method can be solved.

[Brief description of the drawings]

FIG. 1 is an overall system diagram of a continuous liquid preparation apparatus.

FIG. 2 is a system diagram of a conventional batch system.

[Explanation of symbols]

 Reference Signs List 1 buffer tank 3 metering pump 6 mixer (static mixer) 8a, 8b metering solution pump 10a, 10b stock tank 11a, 11b load cell 13, 13b washing pipe 15 density meter 16 absorbance meter 17 conductivity meter 20a, 20b cushion tank A , Ba, Bb Mass flow meter

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B01F 3/00-5/26 B01F 15/00-15/06 G05D 9/00-11/16

Claims (3)

(57) [Claims] 1. A continuous liquid preparation device for mixing a stock solution and a mixed solution, wherein the stock solution tank provided with a weight measuring device, a fixed stock solution pump controlled from the stock solution tank via a mass flow meter, A liquid dispensing device, comprising: a control device that compares a measured value of the device with a value of the mass flow meter. 2. A continuous liquid dispensing apparatus for mixing a stock solution and a mixed solution, wherein a metering pump for controlling the amount of the mixed solution from a buffer tank via a mass flowmeter, and a stock solution from the stock solution tank via a mass flowmeter. Liquid pump controlled, a mixer for mixing the liquids from the pumps, a mass flow meter provided at the outlet of the mixer, and a comparison between the total value of the mass flow meter and the value of the same mass flow meter. A liquid dispensing device, comprising: a control device for calculating. 3. A continuous liquid preparation apparatus for mixing a stock solution and a mixed solution, wherein a ratio of the stock solution flow rate to the mixed solution flow rate is controlled, and an integrated value of a mass flow meter for measuring the mixed solution flow rate from a buffer tank is used. When the value of the mixed liquid amount and the amount of the undiluted solution is equal to or more than a preset value, the measured value of the weighing device that measures the undiluted solution flow rate from the undiluted solution tank is controlled by changing the set ratio of the raw material. A liquid dispensing apparatus characterized in that: