JPH0465571A - Method for preparing chemical - Google Patents

Abstract

PURPOSE:To improve quality by homogenization treatment of a material to be treated by weighing prescribed amounts of water and prescribed chemicals with a weighing tank, feeding the water and the aforementioned chemicals to a mixing tank, carrying out stirring and mixing and accurately regulating the amount of the mixed chemical and mixing ratio. CONSTITUTION:A weighing tank 3 equipped with a weighing device 2 at the bottom and a water storage tank 4 and plural chemical storage tanks 5 thereon are arranged. A mixing tank 6 having rotatable stirring blades 19 installed therein on the downstream side of the aforementioned weighing tank 3 and plural chemical storage tanks 7 on the side thereof are arranged to construct an automatic preparing device 1. A valve 10 of the water storage tank 4 is initially opened to feed a prescribed amount of water to the weighing tank 3 while weighing the water and required chemicals in the respective chemical storage tanks 5 are then successively weighed and fed to the weighing tank 3. A valve 18 is subsequently opened to deliver the resultant chemical in the weighing tank 3 to the mixing tank 6 and mixing and stirring are performed to prepared a prescribed chemical, which is subsequently housed in the chemical storage tanks 7.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for preparing a drug solution with a predetermined ratio.

[Conventional technology]

Approximately 500 chemicals are used when processing fabrics with dyeing and sorting machines, etc. installed on the machine side of the dyeing and sorting machines. Check the front and rear mixing tanks to see when workers are free.
A method is used in which a predetermined amount of the medicinal solution stored in each medicinal solution storage tank is transported to a mixing tank, and agitated and mixed in this mixing tank to prepare a medicinal solution at a predetermined ratio.

[Problem to be solved by the invention]

In the above-mentioned conventional method of preparing a chemical solution with a predetermined ratio, the mixture is prepared each time it is needed, taking into account the senses and experience of the operator, and the proportions often differ slightly each time it is mixed.
There was a problem in that it was difficult to perform stable and uniform treatment due to the difference in the ratio of the chemical solution. What's more, the compounding process is done in a large mixing tank with a large capacity for 300ml at a time.
A large amount of drug solution ranging from 0 to 5001 is prepared. On the other hand, the amount of fabric to be treated is not constant, and if there is a shortage of chemical solution near the end of processing fabric, a certain amount of chemical solution is prepared, so there is a large amount of chemical solution left unused. There was also the problem that not only was the chemical solution was wasted, but the solution cost was also increased accordingly. In addition, the remaining chemical solution is treated as wastewater and then drained into a river or the like, but there is a problem in that the amount of wastewater becomes large. Furthermore, when the type of chemical solution is changed, the inside of the mixing tank must be cleaned each time, which is time consuming and has the problem of poor mixing efficiency. The chemical liquid mixing method according to the present invention has been proposed in view of the above-mentioned problems, and aims to automatically and always accurately mix a certain ratio of chemical liquids, and to reduce the remaining amount of the chemical liquid as much as possible. The purpose is to make it possible.

[Means to solve the problem]

In order to achieve the above object, a chemical solution mixing method according to the present invention measures a predetermined amount of water or less and a predetermined amount of a chemical solution in a measuring tank, and sends the chemical solution and water from the measuring tank to a mixing tank. After that, the inside of the measuring tank is washed with water obtained by subtracting the amount of water below the specified amount from the specified amount of water in the measuring tank, and the water that has been washed inside the measuring tank is supplied from the measuring tank to the mixing tank and mixed by stirring. The present invention is characterized in that the chemical liquid is prepared at a predetermined ratio by repeating each step in order to prepare the desired amount of the chemical liquid. This is characterized by controlling the supply amount to be large and to supply a small amount around a predetermined amount.

[Effect]

First, the water and each chemical solution stored in the water storage tank and the chemical solution storage tank are metered in the measuring tank and supplied into the measuring tank. The following amounts are supplied into a measuring tank, and the chemical solution supplied into the measuring tank is diluted with this water and, after being measured, is sent to a mixing tank. In addition, the amount of liquid supplied from the water storage tank and/or chemical solution storage tank into the measuring tank is large at the beginning of the supply, but when it is around a predetermined amount, it is throttled down to a small amount, so that the specified amount is accurately supplied. It will be done. Next, in the mixing tank, a predetermined amount of water or less and a chemical solution are mixed, and at the same time, the amount of water that is less than the predetermined amount is subtracted from the measuring tank. The inside of the metering tank is cleaned with this water. Thereafter, the water that has washed the inside of the metering tank is supplied to a mixing tank, where it is stirred and mixed with the previously supplied water and chemical solution to prepare a chemical solution with a predetermined ratio. Thereafter, this process is repeated to prepare a desired amount of drug solution.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for preparing a drug solution according to the present invention will be explained based on the drawings. FIG. 1 is a schematic diagram of an automatic chemical compounding apparatus for preparing chemical liquids to be applied to fabrics in dyeing, sorting, etc. machines, and the reference numeral 1 in the figure generally indicates this automatic compounding device. The second automatic compounding device 1 includes a measuring tank 3 with a capacity of about 301 and a measuring device 2 at the bottom, a water storage tank 4 storing water above the measuring tank 3, and a plurality of chemical solution storage tanks 5 and 5.・5... are located downstream of the metering tank 3, and a mixing tank 6 and a plurality of chemical storage tanks 7 are located on the side thereof.
・7・7... A water storage tank 4 above the measuring tank 3 and a plurality of chemical liquid storage tanks 5, 5, 5, etc. are connected to the measuring tank 3 by supply pipes 8, 8.
. 8 , 8 . . . , and each supply pipe 8 is provided with a flow rate restricting valve 9 and an opening/closing control valve 10 . A water supply pipe 13 having a flow rate restricting valve 11 and an on-off valve 12 interposed therebetween is connected to the water storage tank 4 above, and this on-off valve 12 is connected to a water level gauge 14 disposed above the water storage tank 4.
The opening/closing is controlled by the output signal. In addition, each of the chemical liquid storage tanks 5 has a chemical liquid storage section 15.
The structure is such that the chemical solution is supplied from the feed pump 16. Although the on-off control valves 10 interposed in each of the supply pipes 8 are shown closer to each storage tank in the figure, they are located closer to each storage tank 4.
In fact, it is provided near the metering tank 3 in order to improve the "cutting" of the liquid from the metering tank 3. A feed pipe 17 is led out from the bottom of the metering tank 3, and an on-off control valve 18 is interposed in the feed pipe 17.
The lower end of the feed pipe 17 is opened into the mixing tank 6. The mixing tank 6 has a capacity of approximately 1,001 cm, and has an internal stirring blade 19 that is rotationally driven by a drive device (not shown). Further, a supply pipe 20 is led out from the bottom of the mixing tank 6 to supply the chemical solution prepared here to a processing device, a dyeing/sorting machine, etc., and this supply pipe 20 has an on-off valve 21, a pressure pump 22, and a pressure pump 22. A flow control valve 23 is interposed. Chemical solution storage tanks 7, 7 arranged side by side of the mixing tank 6
・A chemical solution that can only be mixed during stirring is stored in 7, and supply pipes 25, 25, 25... A quantitative supply pump 26 and a flow rate control valve 27 are interposed therebetween. Each of the above-mentioned opening/closing control valves 10 is configured such that a valve body (not shown) is opened or closed by an air cylinder driven by pressurized air, and the air cylinder is equipped with a pressure pipe 29 and a pressure pipe (not shown). Air whose pressure has been adjusted by the source pressure device 28 is supplied via a solenoid valve (not shown) controlled by the control device, or a pressure reducing valve and a solenoid valve are used to adjust the opening/closing (opening degree) of each on-off control valve 10. A control device 30 formed in combination allows for further adjustment and supply. Due to the pressure-adjusted air, the initial supply amount from the water storage tank 4 and each chemical solution storage tank 5 to the metering tank 3 is large, and a small amount is supplied near a predetermined amount. In addition, a desired chemical solution is supplied to the metering tank 3 by appropriately selecting and driving each electromagnetic valve provided one for each air cylinder. In the automatic compounding device 1 configured as described above, when the drug solution compounding start button of the control device (not shown) is turned on,
First, the open/close control valve lO of the water storage tank 4 is opened, and the water in the water storage tank 4 is metered and supplied to the metering tank 3. At this time, the amount of water from the water storage tank 4 is less than the predetermined amount,
In other words, the measuring tank 3
Approximately half of the maximum capacity (calculated by multiplying the amount to be prepared at one time under 30G) is supplied to the measuring tank 3. When the on-off control valve 10 for supplying the necessary chemical solution is selectively opened in sequence, the chemical solution is sequentially measured and supplied to the measuring tank 3 from each of the chemical solution storage tanks 5, 5, 5, etc. The water is diluted with the supplied water and stored in the metering tank 3. At this time, a metering signal from the metering device 2 installed in the metering tank 3 causes the liquid in the metering tank 3 to flow from the water storage tank 4 and the chemical storage tank 5. Initially, a large amount of each liquid is supplied, and as the on-off control valve IO is throttled down to supply a small amount around a predetermined amount, it is possible to accurately supply the specified amount. When the chemical solution has been added and the on/off control valve 18 is opened, the chemical solution in the metering tank 3 is supplied to the mixing tank 6 through the feed pipe 17. Next, in the mixing tank 6, water and the chemical solution are mixed in a predetermined amount or less. At the same time, water is supplied into the measuring tank 3 by subtracting the amount of water below the predetermined amount, and this water fills the measuring tank 3. After being washed, it is supplied to the mixing tank 6 via the feed pipe 17.Then, the water that has washed the inside of the measuring tank 3 is supplied to the mixing tank 6, where it is stirred and mixed with the previously supplied water and chemical solution. Then, the chemical solution at a predetermined ratio is prepared in the mixing tank 6.The amount of the chemical solution prepared in the mixing tank 6 at once is small, less than the maximum capacity (30n) of the measuring tank 3. Therefore, the desired amount of chemical solution is prepared by repeating the above-mentioned method.Since the inside of the measuring tank 3 is cleaned with water each time a chemical solution is prepared, the type of chemical solution, etc. Even if there is a change in the amount, it can be changed quickly.Furthermore, the desired amount of the chemical solution to be prepared by being supplied from the measuring tank 3 to the mixing tank 6 is divided into multiple batches. The amount of chemical solution prepared at one time is extremely small, and therefore the amount of chemical solution left behind is also small. However, it is not limited to these, and if it is a mixture of multiple medicinal solutions, this invention
Of course, the obvious method can be implemented. [Effects of the Invention] As explained above, the present invention uses a measuring tank to measure water and a predetermined chemical solution as specified, and supplies them to a mixing tank, where they are stirred and mixed. To,
A chemical solution with an accurate ratio can be easily prepared without relying on the experience or intuition of the operator. In addition, the amount of liquid supplied into the metering tank is large at the beginning of the supply, and is throttled down to a small amount near the predetermined amount, making it possible to measure delicate amounts with extreme precision. The amount and ratio of the medicinal solution to be prepared can be precisely controlled. This has the advantage that the processed material can be processed uniformly and the quality can be improved. Furthermore, since the desired amount of the drug solution is prepared in multiple batches, the amount of the drug solution prepared per time can be reduced, and the amount of the drug solution left unused can also be reduced. This also has the advantage of reducing consumption of chemical solutions and reducing running costs. Furthermore, there is an advantage that the remaining chemical solution can be treated as waste water before being drained into a river or the like, thereby making it possible to extremely reduce the amount of waste water. In addition, since the measuring tank is cleaned with water every time each chemical solution is prepared, even if the type of chemical solution is changed,
It also has the advantage of being able to be changed quickly and greatly improving the compounding efficiency of drug solutions. Furthermore, the water used to wash the measuring tank can be used to prepare the chemical solution without being released outside, which has many advantages, such as making effective use of the chemical solution and preventing pollution caused by discharge. be.

[Brief explanation of the drawing]

The drawings show an apparatus for carrying out the method of the present invention, and FIG. 1 is a schematic diagram of an automatic blending apparatus for blending chemicals to be applied to fabrics in machines for dyeing, sorting, etc.

Claims (2)

[Claims] (1) Measure less than a predetermined amount of water and a predetermined amount of chemical solution in a measuring tank, send the chemical solution and water from the measuring tank to a mixing tank, and then add the predetermined amount of water to the measuring tank. The inside of the measuring tank is washed with water after subtracting the amount of water below the specified amount, and the water that has been washed inside the measuring tank is supplied from the measuring tank to the mixing tank, where it is stirred and mixed to prepare a chemical solution with a specified ratio. 1. A method for preparing a drug solution, characterized in that the steps are repeated in sequence to prepare a desired amount of the drug solution. (2) When water and/or chemical solution is supplied from the storage tank to the measuring tank, the supply amount is controlled to be large at the initial stage and small amount is supplied near the predetermined amount. Method of preparing drug solutions.