JP3204610U - Alcohol diluter - Google Patents

Abstract

An inexpensive alcohol dilution apparatus is provided. A dilution tank, a water supply pipe for supplying water into the dilution tank, a manually operated water supply valve disposed on the water supply pipe, A stock solution supply line 12 for supplying the alcohol stock solution into the dilution tank 2, a manually operated stock solution supply valve 24 disposed on the stock solution supply line 12, and the stock solution supply line 12 communicated with each other. The stock solution supply pump 20, the flow meters 30 and 31 for grasping the supply amount of water and alcohol stock solution into the dilution tank 2, and the air supply disposed at the bottom of the dilution tank 2 A supply port 32 for pumping air to the supply port 32a; and a discharge port 26 for taking out diluted alcohol from the dilution tank 2. The supply valve 18 and the stock solution supply The valve 24 does not visually check the flow meters 30 and 31. Is disposed et operable position. [Selection] Figure 1

Description

The present invention relates to an alcohol dilution apparatus.

As an apparatus for diluting an alcohol such as methanol or ethanol with water, an apparatus shown in FIG. 5 (see http://182.48.11.199/nortake/alcoh0508/) is known. This diluting device is called a static mixer, which is a line mixer 50 without a drive unit, a stock solution supply line 52 for sending the alcohol stock solution to the mixer 50 with a pump 51, and a pump 53 for sending water to the mixer 50. Water supply line 54, a raw liquid mass flow meter 55 disposed on the raw liquid supply line 52, a water supply mass flow meter 56 disposed on the water supply line 54, and the mixer 50 and a diluted alcohol discharge line 57 for taking out the diluted alcohol from 50. According to the conventional dilution apparatus, it is said that the installation space is reduced because a dilution tank is unnecessary.

The static mixer 50 is a mixer having a special structure in which a large number of right elements and left elements are alternately arranged along the length direction of the mixer, and details thereof are described in, for example, Patent Document 1. Each element is formed by twisting a rectangular plate 180 degrees, and is divided into a right element and a left element according to the direction of twist.

JP 2009-106817 A

However, since the conventional diluting apparatus requires a special mixer 50 called a static mixer, the diluting apparatus itself is expensive. For this reason, the manufacturing cost of diluted alcohol was also high.

This invention is made | formed in view of the above situations, and it aims at providing the cheap alcohol dilution apparatus which can manufacture diluted alcohol at low cost.

In order to solve the above-mentioned problems, an alcohol dilution apparatus according to the present invention includes a dilution tank, a water supply line for supplying water into the dilution tank, and a manually operated type disposed on the water supply line. A feed water supply valve, a stock solution supply line for supplying the alcohol stock solution into the dilution tank, a manually operated stock solution supply valve disposed on the stock solution supply line, and a communication with the stock solution supply line A stock solution supply pump, a flow meter for grasping the supply amount of water and alcohol stock solution into the dilution tank, an air supply port disposed at the bottom of the dilution tank, and the air supply An air supply line for pumping air to the mouth and a discharge port for taking out diluted alcohol from the dilution tank, and the water supply valve and the stock solution supply valve can be operated while observing the flow meter It is arranged at a position Claim 1).

The alcohol dilution apparatus according to the present invention can be used as follows. The operator supplies water into the dilution tank by opening the water supply valve, and similarly supplies the alcohol stock solution into the dilution tank by opening the stock solution supply valve. Each supply amount of water and alcohol stock solution can be grasped by a flow meter. Since the required supply amount of water and alcohol stock solution can be known according to the concentration and amount of diluted alcohol to be obtained, when each supply amount reaches a desired amount, the worker closes the water supply valve and the stock solution supply valve .

Next, air is pumped through the air supply line to the bottom of the dilution tank (aeration). This air rises as bubbles in the liquid in the dilution tank and acts to mix water and the alcohol stock solution. Thereby, diluted alcohol with a uniform concentration is generated. This diluted alcohol is taken out from the outlet. The air pressure feeding to the bottom of the dilution tank can be performed in parallel with the supply of the alcohol stock solution into the dilution tank containing water.

According to the present invention, since it is not necessary to use a special stirring device, an inexpensive alcohol dilution device can be obtained. Therefore, the manufacturing cost of the diluted alcohol produced | generated using the apparatus is also suppressed.

The shape of the dilution tank is most preferably a cylindrical shape, but other shapes such as a rounded rectangular tube shape can also be adopted. Further, the air supply port provided at the bottom in the dilution tank may be single or plural. If the plurality of air supply ports are uniformly distributed in the bottom of the dilution tank, it is more preferable because air bubbles are reliably supplied to the entire inside of the dilution tank.

As a preferred embodiment, the bottom surface of the dilution tank is a bottom-type bottom surface, an opening is formed in the center of the bottom surface, and a discharge pipe communicates with the opening. A mode in which a manually operated discharge valve is provided, the discharge port is formed on the downstream side of the discharge valve, and the air supply port is located in the discharge pipe (Claim 2).

In this embodiment, since the air supply port is located in the discharge pipe, air is also supplied into the discharge pipe on the upstream side (dilution tank side) from the discharge valve. For this reason, water and the alcohol stock solution are evenly mixed in the discharge pipe upstream of the discharge valve.

In this embodiment, the diluted alcohol is taken out through the discharge pipe by the operator manually opening the discharge valve. Since the opening communicating with the discharge pipe is formed in the center of the bottom surface of the bottom of the dilution tank, all the diluted alcohol in the dilution tank can be taken out.

As a preferred embodiment, the dilution tank has a vertical cylindrical shape, and an inner periphery of the dilution tank is brought into the dilution tank by a raw solution discharged from an opening end of the raw solution supply pipe in the tank. The dilution end of the stock solution supply pipe is in the lower part of the dilution tank and in the vicinity of the inner peripheral surface of the dilution tank so that a circumferential rotating liquid flow guided by the surface is generated. The aspect arrange | positioned toward the circumferential direction of an industrial tank is illustrated (Claim 3).

In this embodiment, the alcohol stock solution is supplied after water is placed in the dilution tank. That is, when the operator manually operates the water supply valve, water is supplied to the empty dilution tank through the water supply line. The amount of water supplied into the dilution tank can be grasped by a flow meter. Since the required amount of water is known according to the concentration and amount of diluted alcohol to be obtained, when the amount of water supplied reaches the desired amount, the operator manually stops the water supply valve and stops the water supply. To do.

Next, the alcohol stock solution is supplied into a dilution tank containing water. When the operator manually operates the stock solution supply valve in the operating state of the stock solution supply pump, the alcohol stock solution is supplied to the dilution tank containing water through the stock solution supply line. The supply amount of the alcohol stock solution into the dilution tank can be grasped by a flow meter. When the supply amount of the alcohol stock solution reaches a desired supply amount, the operator manually operates the stock solution supply valve to stop the supply of the alcohol stock solution.

In this embodiment, the opening end portion in the tank of the stock solution supply pipe is disposed in the lower part of the dilution tank and in the vicinity of the inner peripheral surface of the dilution tank in the circumferential direction of the dilution tank. The alcohol stock solution has a specific gravity smaller than that of water. For this reason, the alcohol stock solution released from the opening end in the tank of the stock solution supply pipe rises spirally in the water while rotating along the inner peripheral surface of the dilution tank. By such movement of the alcohol stock solution, a stirring action of the liquid in the dilution tank is exhibited. As a result, mixing of the water in the dilution tank and the alcohol stock solution is promoted.

Thereafter, in the same manner as described above, air is pumped to the bottom of the dilution tank through the air supply line. This air rises as bubbles in the liquid in the dilution tank and acts to mix water and the alcohol stock solution. Thereby, diluted alcohol with a uniform concentration is generated. In the same manner as described above, the air pressure feeding to the bottom of the dilution tank can be performed in parallel with the supply of the alcohol stock solution into the dilution tank containing water.

In this embodiment, primary stirring and mixing of water and alcohol stock solution is performed by supplying the alcohol stock solution, and then (or in parallel) secondary stirring and mixing of water and alcohol stock solution by supplying air. Is done. Since the stirring and mixing action is performed in two stages, it is possible to produce diluted alcohol having a uniform concentration as a whole even in an environment where it is difficult to mix water and alcohol stock solution due to low temperature in winter. .

In this embodiment, the phrase “the opening end in the tank of the stock solution supply line is disposed in the circumferential direction of the dilution tank” is not strictly a circumferential direction, but a stock solution supply. The tank opening end of the concentrate supply pipe is directed in a direction in which the alcohol stock solution discharged from the tank opening end of the pipe line causes a circumferential rotating liquid flow guided to the inner peripheral surface of the dilution tank. It is that.

As a preferred embodiment, a mode in which the opening end part in the tank of the stock solution supply pipe is disposed upward in the lower part in the dilution tank (Claim 4). Also in this embodiment, the alcohol stock solution is supplied after putting water into the dilution tank, as described above.

In this embodiment, the alcohol stock solution discharged from the opening end in the tank of the stock solution supply pipe is spouted into the water of the dilution tank. As the alcohol stock solution shoots up in water, a vertical rotating flow is generated in the liquid in the dilution tank, and a stirring action is exhibited. As a result, mixing of the water in the dilution tank and the alcohol stock solution is promoted. The greater the speed at which the alcohol stock solution is spouted (spout pressure), the higher the mixing acceleration of water and the alcohol stock solution.

Thereafter, in the same manner as described above, air is pumped to the bottom of the dilution tank through the air supply line. This air rises as bubbles in the liquid in the dilution tank and acts to mix water and the alcohol stock solution. Thereby, diluted alcohol with a uniform concentration is generated. In the same manner as described above, the air pressure feeding to the bottom of the dilution tank can be performed in parallel with the supply of the alcohol stock solution into the dilution tank containing water.

Also in this embodiment, primary stirring and mixing of water and alcohol stock solution is performed by supplying the alcohol stock solution, and then (or in parallel), secondary stirring and mixing of water and alcohol stock solution is performed by supplying air. Mixing takes place. Since the stirring and mixing action is performed in two stages, it is possible to produce diluted alcohol having a uniform concentration as a whole even in an environment where it is difficult to mix water and alcohol stock solution due to low temperature in winter. .

As a preferred embodiment, the central longitudinal axis of the stock solution supply pipe from the position where the opening end in the tank is laterally displaced from the central longitudinal axis of the dilution tank in the lower part of the dilution tank. The aspect arrange | positioned diagonally upward toward is illustrated (Claim 5).

In this embodiment, the alcohol stock solution released from the opening end in the tank of the stock solution supply pipe is jetted upward in the dilution tank water toward the central longitudinal axis of the dilution tank. The liquid in the dilution tank is agitated both in the vertical direction and in the horizontal direction due to the spray of the alcohol stock solution in water. As a result, mixing of the water in the dilution tank and the alcohol stock solution is further promoted.

As a preferred embodiment, a mode in which the dilution tank has a vertically long cylindrical shape is exemplified (Claim 6).

As a preferred embodiment, the water supply line is connected to the water supply line and the stock solution supply line through an on-off valve, and the water supply line is supplied by air that is pumped by opening the on-off valve. And the undiluted solution supply pipe, the water remaining on the downstream side of the water supply valve and the undiluted solution supply valve and the alcohol undiluted solution are pushed out into the dilution tank. ).

It is a partially cutaway front view of the alcohol dilution apparatus concerning one embodiment of the present invention. It is a top view of the alcohol dilution apparatus of FIG. It is the front view which disclosed the inside of the alcohol dilution apparatus which concerns on other embodiment of this invention. It is the IV-IV arrow top view of FIG. It is a schematic block diagram of the conventional alcohol dilution apparatus.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG.1 and FIG.2, the alcohol dilution apparatus 1 which concerns on one Embodiment of this invention is equipped with the tank 2 for dilution. In this tank 2, water and alcohol stock solution are mixed to produce diluted alcohol. Examples of the alcohol stock solution include methanol and ethanol.

The dilution tank 2 has a vertical cylindrical shape and is fixed to the installation surface 4 by an appropriate number (for example, four) of supporting legs 3. The vertical dilution tank 2 means that the cylindrical dilution tank 2 is arranged so that the central axis X extends in the vertical direction. The dilution tank 2 is preferably vertically long so that the water and the alcohol stock solution are sufficiently mixed.

The dilution tank 2 is made of, for example, a stainless steel plate. Although the size of the dilution tank 2 is arbitrary, as an example of specific numerical values, the diameter can be 1.5 m, the vertical length is 2.1 m, and the capacity is about 3700 liters.

The dilution tank 2 itself is closed. As shown in FIG. 2, a manhole 6 is formed on the upper surface of the dilution tank 2, and the manhole 6 is covered with a manhole cover 5 that can be freely opened and closed. A viewing window 7 is formed in the manhole cover 5, and the viewing window 7 is covered with an openable / closable viewing window cover 8. An elevating ladder 9 is attached to the side surface of the dilution tank 2.

A vent pipe 10, a water supply pipe 11, a stock solution supply pipe 12, a discharge pipe 13, and an air supply pipe 32 are connected to the dilution tank 2.

The vent pipe 10 is disposed on the upper surface of the dilution tank 2. The presence of the vent pipe 10 makes it possible to smoothly supply water, alcohol stock solution and air into the dilution tank 2 and to smoothly discharge diluted alcohol from the dilution tank 2.

Water is supplied into the dilution tank 2 through the water supply pipe 11. The upstream end of the water supply pipe 11 is communicated with the raw material water tank 15 via the water supply pump 14. A water return line 17 is disposed in the middle of the water supply line 11 via a water supply switching valve 16, and the water return line 17 communicates with the raw material water tank 15. The water supply switching valve 16 returns the water in the raw water tank 15 to the dilution tank 2 and the water supply operation position and the water in the raw water tank 15 through the water return line 17 into the raw water tank 15. Switching to the return operation position is possible. When the water supply pump 14 is turned on and the water supply switching valve 16 is switched to the water supply operation position, the water in the raw material water tank 15 is pumped to the dilution tank 2 side through the water supply pipe 11.

As shown in FIG. 1, the water supply pipe 11 extends linearly downward through the upper surface of the dilution tank 2 to the lower part in the dilution tank 2. The in-tank opening end portion 11 a of the water supply pipe 11 is disposed downward near the bottom surface in the dilution tank 2.

On the water supply line 11, a manually operated water supply valve 18 is disposed outside the dilution tank 2. By turning the operation lever (operation member) 19 of the water supply valve 18, the water supply valve 18 can be switched between a fully open state and a fully closed state. Thereby, ON / OFF switching of the water supply to the dilution tank can be performed. Furthermore, the water supply valve 18 can be adjusted to a free opening between the fully open state and the fully closed state by rotating the operation lever 19. Thereby, the flow volume of water can be adjusted.

On the water supply pipe 11, a flow meter 30 for grasping the amount of water supplied into the dilution tank 2 is disposed downstream of the water supply valve 18 (dilution tank 2 side). The flow meter 30 is disposed at a position where an operator can operate the water supply valve 18 while viewing the flow meter 30. The operator closes the water supply valve 18 when the measured value of the flow meter 30 reaches a desired value, and stops the supply of water into the dilution tank 2.

The stock solution supply pipe 12 is a pipe for supplying the alcohol stock solution into the dilution tank 2. The upstream end of the stock solution supply pipe 12 is communicated with the stock solution tank 21 via the stock solution supply pump 20. The stock solution tank 21 is a storage tank fixed at a fixed position.

In the middle of the stock solution supply line 12, a stock solution return line 23 is disposed via a stock solution switching valve 22, and this stock solution return line 23 communicates with the stock solution tank 21. The stock solution switching valve 22 feeds the alcohol stock solution in the stock solution tank 21 to the dilution tank 2 side, and feeds the alcohol stock solution in the stock solution tank 21 into the stock solution tank 21 through the stock solution return line 23. Switching to the return operation position can be performed. When the stock solution supply pump 20 is turned on and the stock solution switching valve 22 is switched to the liquid feed operation position, the alcohol stock solution in the stock solution tank 21 is pressure-fed through the stock solution supply line 12 to the dilution tank 2 side.

As shown in FIG. 1, the stock solution supply pipe line 12 extends linearly downward through the upper surface of the dilution tank 2 to the lower part in the dilution tank 2. As shown in FIG. 2, the in-tank open end 12 a of the stock solution supply pipe 12 faces the circumferential direction of the dilution tank 2 in the lower part of the dilution tank 2 and in the vicinity of the inner peripheral surface of the dilution tank 2. Arranged. This is because the alcohol stock solution discharged at high pressure from the tank opening end 12 a of the stock solution supply pipe 12 is turned into a rotating flow (stirring flow) F along the inner peripheral surface of the dilution tank 2.

The phrase “the tank opening end portion 12a of the stock solution supply pipe 12 is disposed in the circumferential direction of the dilution tank 2” is not strictly a circumferential direction, but the stock solution feed pipe 12 Of the stock solution supply line 12 in the direction in which the alcohol stock solution discharged from the tank opening end portion 12a causes a circumferential rotating fluid flow F (see FIG. 2) guided to the inner peripheral surface of the dilution tank 2. This means that the in-tank opening end portion 12a faces.

As shown in FIG. 1, a manually operated stock solution supply valve 24 is disposed on the stock solution supply line 12 outside the dilution tank 2. By rotating the operation lever (operation member) 25 of the stock solution supply valve 24, the stock solution supply valve 24 can be switched between a fully open state and a fully closed state. Thereby, ON / OFF switching of the stock solution supply to the dilution tank 2 can be performed. Furthermore, by rotating the operation lever 25, the stock solution supply valve 24 can be adjusted to a free opening between the fully open state and the fully closed state. Thereby, the flow volume of alcohol stock solution can be adjusted.

On the undiluted solution supply line 12, an explosion-proof flow meter 31 is provided on the downstream side (dilution tank 2 side) of the undiluted solution supply valve 24 in order to grasp the supply amount of the undiluted alcohol solution into the diluting tank 2. Arranged. The flow meter 31 is disposed at a position where an operator can operate the stock solution supply valve 24 while viewing the flow meter 31. When the measured value of the flow meter 31 reaches a desired value, the worker closes the stock solution supply valve 24 to stop the supply of the alcohol stock solution into the dilution tank 2.

As shown in FIG. 1, the discharge pipe 13 is a pipe for taking out the diluted alcohol generated in the dilution tank 2 from the dilution tank 2. The discharge pipe 13 extends downward from the bottom surface of the dilution tank 2 and is horizontally routed between the support legs 3. The bottom surface of the dilution tank 2 is a bottom-type bottom surface whose center portion swells downward. An opening 2a is formed at the center of the bottom surface, and the discharge pipe 13 communicates with the opening 2a. . Thereby, all the diluted alcohol in the dilution tank 2 can be taken out. The outer end opening of the discharge pipe 13 serves as a diluted alcohol discharge port 26.

A manually operated discharge valve 27 is disposed on the discharge pipe 13. By rotating the operation lever (operation member) 28 of the discharge valve 27, the discharge pipe 13 can be switched between a fully open state and a fully closed state. The discharge valve 27 is switched to the fully opened state only when the diluted alcohol is taken out.

The air supply line 32 is a line for supplying (aeration) stirring air to the bottom of the dilution tank 2. This air rises as bubbles in the liquid in the dilution tank 2 and promotes mixing of water and the alcohol stock solution. The upstream end of the air supply line 32 is communicated with the compressor 33.

As shown in FIG. 1, the air supply line 32 penetrates the lower part of the wall surface of the dilution tank 2 in a liquid-tight manner and extends to the center of the dilution tank 2, and further extends downward from the dilution tank 2. It passes through the bottom opening 2 a and is inserted into the discharge pipe 13. The front end opening of the air supply line 32 is an air supply port 32 a, and this air supply port 32 a is located in the discharge line 13. Preferably, in the discharge pipe 13, the air supply port 32 a is positioned upstream of the discharge valve 27 (on the dilution tank 2 side) and in the vicinity of the discharge valve 27. As a result, air is also supplied into the discharge pipe 13 upstream of the discharge valve 27. For this reason, the water and the alcohol stock solution are evenly mixed in the discharge pipe 13 upstream of the discharge valve 27.

In addition, about the part inserted in the discharge pipe line 13 among the supply pipe lines 32, it is good to form using the flexible tube 41 so that it can respond to the curve of the discharge pipe line 13 freely.

Although not shown in the drawings, a hole is provided in the discharge pipe 13 to serve as the air supply port 32a, and the air supply line 32 can be communicated with the air supply port 32a outside the dilution tank 2. .

As shown in FIG. 1, at least two manually operated air supply control valves are disposed on the air supply line 32 outside the dilution tank 2. In the illustrated example, the upstream side air supply control valve 34 is of a continuous rotation operation type, and the downstream side air supply control valve 35 is of a swing lever operation type within a predetermined angle range. After opening the upstream air supply control valve 34 and further opening the downstream air supply control valve 35, the supply of air into the dilution tank 2 is started.

The downstream air supply control valve 35 includes an operation lever 36 that can be swung between a fully closed operation position and a fully open operation position. By rotating the operation lever (operation member) 36, the air supply control valve 35 on the downstream side can be switched between a fully open state and a fully closed state. Thereby, ON / OFF switching of the air supply to the dilution tank 2 can be performed. Further, by swinging the operation lever 36, the downstream air supply control valve 35 can be adjusted to a free opening between the fully open state and the fully closed state. Thereby, the amount of air supplied into the dilution tank can be adjusted.

On the air supply line 32, a check valve 37 is disposed between the air supply control valve 35 and the air supply port 32a on the downstream side. The check valve 37 allows only the air flow toward the air supply port 32a and prevents the liquid in the dilution tank 2 from flowing beyond the check valve 37 to the air supply control valve 35 side. .

The air supply line 32 is piped upward until it reaches further above the upper end of the dilution tank 2 outside the dilution tank 2, and communicates with the compressor 33 via an appropriate filter 38. The supply pipe 32 is piped upward until it reaches further above the upper end of the dilution tank 2 even if the check valve 37 is damaged or the like, the backflow of the liquid in the dilution tank 2 is caused by the dilution tank. This is to stop the water level within the upper limit.

In addition, the air supply port 32a arrange | positioned at the bottom part in the tank 2 for dilution is not restricted to single, and multiple may be sufficient. If the plurality of air supply ports 32a are evenly distributed at the bottom of the dilution tank 2, it is more preferable that bubbles are easily supplied to the entire dilution tank 2 and the agitation effect is improved. Although the direction of the air supply port 32a may be upward, it is preferably disposed downward so that air collides with the bottom surface in the dilution tank 2. This is because it is possible to prevent water having a specific gravity greater than that of the alcohol stock solution from remaining near the bottom surface of the dilution tank 2.

The dilution tank 2 is provided with a liquid level gauge 29 for measuring the liquid level in the tank 2. With this liquid level gauge 29, the amount of liquid in the dilution tank 2 can be constantly grasped.

In the illustrated example, two liquid level gauges 29a and 29b are used as the liquid level gauge 29. The upper liquid level gauge 29a displays the liquid level height in the upper half area of the dilution tank 2. The lower liquid level gauge 29b displays the liquid level in the lower half area of the dilution tank 2. Either the upper level gauge 29a or the lower level gauge 29b can be used according to the required amount of diluted alcohol produced in the dilution tank 2.

The alcohol dilution apparatus 1 configured as described above is used as follows.

As a first work process, water is put into an empty dilution tank 2. Specifically, first, the worker turns on the water supply pump 14. At this time, since the water supply switching valve 16 is in the return operation position, the water in the raw water tank 15 pumped by the water supply pump 14 is returned to the raw water tank 15 through the water return pipe 17.

Next, the worker switches the water supply switching valve 16 to the water supply operation position. Thereby, the flow path of the water pumped by the feed pump 14 is switched, and the water in the raw material water tank 15 is fed to the dilution tank 2 side. However, since the water supply valve 18 is closed, water supply into the dilution tank 2 is not started at this stage, and the water pumped by the water supply pump 14 passes through the water return line 17 into the raw water tank 15. Returned.

Next, the worker opens the water supply valve 18. As a result, water begins to be supplied into the empty dilution tank 2 through the water supply pipe 11. The operator can adjust the flow rate of water passing through the water supply valve 18 by adjusting the opening of the water supply valve 18.

The amount of water supplied into the dilution tank 2 is measured by an operator by visually observing the flow meter 30. Since the required amount of water is known according to the concentration and amount of diluted alcohol to be obtained, when the water amount reaches a desired amount by visual observation of the flow meter 30, the operator manually operates the water supply valve 18 to supply water. Stop. Then, after the liquid level is stopped, the liquid level gauge 29 is checked. If the water level is OK, the water supply pump 14 is turned off.

Next, as a second operation step, the alcohol stock solution is supplied into the dilution tank 2 containing water. Specifically, first, the stock solution supply pump 20 is turned on. At this time, since the stock solution switching valve 22 is in the return operation position, the alcohol stock solution in the stock solution tank 21 pumped by the stock solution supply pump 20 is returned to the stock solution tank 21 through the stock solution return line 23.

Next, the operator switches the stock solution switching valve 22 to the liquid feeding operation position. Thereby, the flow path of the alcohol stock solution pumped by the stock solution supply pump 20 is switched, and the alcohol stock solution in the stock solution tank 21 is pumped to the dilution tank 2 side. However, since the stock solution supply valve 24 is closed, the supply of the alcohol stock solution into the dilution tank 2 is not started at this stage, and the alcohol stock solution pumped by the stock solution supply pump 20 passes through the stock solution return line 23 to obtain the stock solution. It is returned to the tank 21.

Next, the worker opens the stock solution supply valve 24. As a result, the alcohol stock solution starts to be supplied through the stock solution supply pipe 12 into the dilution tank 2 containing water. The operator can adjust the flow rate of the alcohol stock solution passing through the stock solution supply valve 24 by adjusting the opening degree of the stock solution supply valve 24.

The supply amount of the alcohol stock solution into the dilution tank 2 is measured by an operator by visually observing the flow meter 31. Since the amount of water corresponding to the concentration and amount of the diluted alcohol to be obtained is already contained in the dilution tank 2, the amount of alcohol calculated in advance so as to obtain the concentration and amount of the diluted alcohol to be obtained. The stock solution may be supplied. When the measured value of the flow meter 31 reaches the desired alcohol stock solution supply amount, the operator manually operates the stock solution supply valve 24 to stop the supply of the alcohol stock solution. Then, after the liquid level is stopped, the liquid level gauge 29 is checked. If the liquid level is OK, the raw material supply pump 20 is turned off. In addition, when water and alcohol stock solution are mixed, the volume of the diluted alcohol produced | generated by that becomes small in a predetermined ratio rather than the total volume of the supplied water and alcohol stock solution. In view of this predetermined ratio, the alcohol stock solution is added in an amount calculated in advance so as to obtain the concentration and amount of diluted alcohol to be obtained.

In the present embodiment, the in-tank open end 12a of the stock solution supply pipe 12 is arranged in the lower part of the dilution tank 2 and in the vicinity of the inner peripheral surface of the dilution tank 2 in the circumferential direction of the dilution tank 2. Established. The alcohol stock solution has a specific gravity smaller than that of water. For this reason, the alcohol stock solution released from the in-tank opening end portion 12a of the stock solution supply pipe 12 rises spirally in the water while rotating (guided) along the inner peripheral surface of the dilution tank 2. Due to such movement of the alcohol stock solution, a rotationally rising liquid flow F is generated in the entire dilution tank 2, and a stirring action of the liquid in the dilution tank 2 is achieved. As a result, the water in the dilution tank 2 and the alcohol stock solution are mixed, and diluted alcohol having a uniform concentration is easily generated. The greater the jetting speed (spout pressure) of the alcohol stock solution from the opening end 12a in the tank, the greater the promotion of mixing water and the alcohol stock solution.

Next, as a third operation step, stirring air is supplied into the dilution tank 2 in a state where water and alcohol stock solution are supplied (aeration). Specifically, after the worker turns on the compressor 33, the upstream air supply control valve 34 is fully opened, and the operation lever 36 is operated to open the downstream air supply control valve 35. Thereby, the compressed air by the compressor 33 is ejected from the air supply port 32a.

In the embodiment of FIG. 1, since the air supply port 32 a is located in the discharge pipe 13, air is also supplied into the discharge pipe 13 upstream of the discharge valve 27 (dilution tank 2 side). . For this reason, water and the alcohol stock solution are evenly mixed in the discharge pipe 13 upstream of the discharge valve 27.

The air ejected from the air supply port 32a becomes a large number of bubbles and rises up in the liquid in the dilution tank 2. As a result, the liquid in the dilution tank 2 is agitated, and water and the alcohol stock solution are reliably mixed. Thereafter, the worker fully closes the two air supply control valves 34 and 35 and turns off the compressor 33, thereby completing the third work process. The air pressure feeding to the bottom of the dilution tank 2 can be performed in parallel with the supply of the alcohol stock solution into the dilution tank 2 containing water.

Dilution alcohol is produced | generated in the tank 2 for dilution by the above work process. Whether or not the diluted alcohol has a desired concentration is examined by removing a small amount of diluted alcohol from sample outlets (not shown) arranged at a plurality of locations on the peripheral wall of the dilution tank 2. Although not shown, a sample take-out tube is communicated with the sample take-out port, and a manually operated cock is disposed on the sample take-out tube. If the concentration of the diluted alcohol is appropriate, the discharge valve 27 is opened and the diluted alcohol is taken out from the discharge port 26.

According to the present embodiment, primary stirring and mixing of water and alcohol stock solution is performed by supplying the alcohol stock solution, and then (or in parallel) secondary stirring of water and alcohol stock solution by supplying air. • Mixing is performed. Since the stirring and mixing action is performed in two stages, it is possible to produce diluted alcohol having a uniform concentration as a whole even in an environment where it is difficult to mix water and alcohol stock solution due to low temperature in winter. . According to the present embodiment, since it is not necessary to use a special stirring device, an inexpensive alcohol dilution device can be obtained. Therefore, the manufacturing cost of diluted alcohol produced using the apparatus is also suppressed.

As another embodiment, it is possible to omit the third work step and finish the stirring / mixing step of water and the alcohol stock solution only by the first work step and the second work step. That is, under high-temperature environments such as summer, the temperature of water and alcohol stock solution is originally high, so that sufficient mixing and uniform mixing of water and alcohol stock solution can be achieved without performing the third work step. Is possible. On the other hand, under an environment where the temperature is low, such as in winter, it is difficult to achieve sufficient mixing and uniform mixing of water and alcohol stock solution only in the first working process and the second working process. Therefore, by additionally performing the third operation step in such a case, it becomes possible to produce a diluted alcohol in which water and an alcohol stock solution are always uniformly mixed regardless of the season and temperature.

It is also possible to mix water and alcohol stock solution only in the third operation step. That is, after supplying water and alcohol stock solution to the dilution tank 2, air is pumped to the bottom of the dilution tank 2. For example, the ratio of the vertical length to the diameter of the dilution tank 2 is increased, and a large number of air supply ports 32a are evenly distributed at the bottom of the dilution tank 2, and the dilution tanks are supplied from the large number of air supply ports 32a. By appropriately determining specific implementation conditions such as jetting air toward the bottom surface of 2 at high speed, it is possible to mix water and alcohol stock solution only by supplying air.

As another embodiment, as shown in FIG. 1, the air supply line 32 is communicated with the water supply line 11 and the stock solution supply line 12 via the on-off valve 42, and the on-off valve 42 is opened for pressure feeding. It is preferable that the water and the alcohol stock solution remaining on the downstream side of the water supply valve 18 and the stock solution supply valve 24 in the feed water pipeline 11 and the stock solution supply pipeline 12 are pushed out into the dilution tank 2 by the air to be supplied. It is.

Specifically, the supply air line 32 is branched downstream of the filter 38 via the direction switching valve 43, and the branched supply air pipe 44 is connected to the supply water valve 18 of the water supply line 11 via the open / close valve 42. In addition, the downstream portion and the portion downstream of the stock solution supply valve 24 of the stock solution supply pipe 12 are communicated. Then, after the second operation step is completed, the direction switching valve 43 is switched to the direction of the branch air supply pipe 44 and the on-off valve 42 is opened. As a result, air is pressure-fed from the compressor 33 to a portion of the water supply pipe 11 downstream of the water supply valve 18 and a portion of the raw liquid supply pipe 12 downstream of the raw liquid supply valve 24. As a result, the water remaining in the vertical pipe downstream of the water supply valve 18 of the water supply pipe 11 and the alcohol stock solution remaining in the vertical pipe downstream of the raw liquid supply valve 24 of the raw liquid supply pipe 12 are diluted. It is pushed into the tank 2 for use. Since the amount of water and the alcohol stock solution measured by the flow meters 30 and 31 always flow into the dilution tank 2, the concentration of the diluted alcohol can be finished as planned.

Next, another embodiment will be described with reference to FIGS. 3 and 4. The example of FIGS. 3 and 4 is a mode in which the direction of the opening end 12a in the tank of the stock solution supply pipe 12 is changed in the examples of FIGS. Since the other configuration is the same as the example of FIGS.

As shown in FIG. 3, in the present embodiment, the in-tank open end 12 b of the stock solution supply pipe 12 is disposed upward in the lower part in the dilution tank 2. The specific upward direction may be obliquely upward as indicated by a solid line in FIG. 3, or may be upward as indicated by a virtual line (two-dot chain line) in FIG. In the case of direct upward, it is preferable to dispose the in-tank open end 12b of the stock solution supply pipe 12 at a position closer to the center of the bottom of the dilution tank 2.

Also in this embodiment, the alcohol stock solution is supplied after water is put into the dilution tank 2 as described above. In this embodiment, the alcohol stock solution released from the in-tank opening end portion 12 b of the stock solution supply pipe 12 shoots up in the water of the dilution tank 2. As the alcohol stock solution spouts in the water, a vertical rotating flow indicated by an arrow is generated in the liquid in the dilution tank 2, and a stirring action is exhibited. As a result, mixing of the water in the dilution tank 2 and the alcohol stock solution is promoted. The greater the speed at which the alcohol stock solution is spouted (spout pressure), the higher the mixing acceleration of water and the alcohol stock solution. In FIG. 3, the symbol S indicates the liquid level.

Thereafter, air is pumped to the bottom of the dilution tank 2 through the air supply line 32 in the same manner as described above. This air rises as bubbles in the liquid in the dilution tank 2 and acts to mix water and the alcohol stock solution. Thereby, diluted alcohol with a uniform concentration is generated.

Also in this embodiment, primary stirring and mixing of water and alcohol stock solution is performed by supplying the alcohol stock solution, and then secondary stirring and mixing of water and alcohol stock solution is performed by supplying air. Since the stirring and mixing action is performed in two stages, it is possible to produce diluted alcohol having a uniform concentration as a whole even in an environment where it is difficult to mix water and alcohol stock solution due to low temperature in winter. .

3 and 4, even under the environment where the temperature is high, such as in summer, the diluted alcohol having a uniform concentration can be obtained by simply pumping the alcohol stock solution into the dilution tank 2 through the stock solution supply line 12. Can be obtained. Therefore, in this case, the supply of air is arbitrary.

As a preferred embodiment, the aspect shown by the solid line in FIG. 3 is that the opening end portion 12b in the tank of the stock solution supply line 12 has a central vertical axis X of the dilution tank 2 at the lower part in the dilution tank 2. It is the aspect arrange | positioned diagonally upward toward the said center longitudinal axis X from the position shifted | deviated from the horizontal direction.

In this embodiment, the alcohol stock solution discharged from the in-tank opening end portion 12b of the stock solution supply pipe 12 passes through the water of the dilution tank 2 in the center of the dilution tank 2 as indicated by an arrow in FIG. Spouts obliquely upward toward the vertical axis X. The liquid in the dilution tank 2 is agitated both in the vertical direction and in the horizontal direction, as indicated by arrows in FIGS. As a result, the mixing of the water in the dilution tank 2 and the alcohol stock solution is further promoted.

As shown in FIG. 3, a small hole 40 is provided in the lower surface of the upward bent portion 39 of the stock solution supply pipe 12. The upward bent portion 39 is formed to make the in-tank open end 12b of the stock solution supply pipe 12 upward. Providing the small hole 40 on the lower surface of the upward bent portion 39 prevents the diluted alcohol from remaining in the upward bent portion 39 when the diluted alcohol is discharged from the dilution tank 2. Further, when the alcohol stock solution is pumped into the dilution tank 2 through the stock solution supply pipe 12, the alcohol stock solution is ejected downward from the small hole 40. As a result, the alcohol stock solution is also supplied to the region below the upward bent portion 39.

The apparatus of the present invention is a methanol diluter by using methanol as the alcohol stock solution. Diluted methanol becomes a nutrient for the aerobic microorganism group that decomposes sludge (activated sludge nutrient). Therefore, it is possible to contribute to efficiently treating sludge in a sewage treatment plant, a human waste treatment plant, a septic tank, etc., by inexpensively and easily producing diluted methanol using the apparatus of the present invention.

DESCRIPTION OF SYMBOLS 2 Dilution tank 2a Opening part 11 Supply water line 12 Concentrated liquid supply line 12a Tank opening end part 13 Discharge line 18 Supply valve 20 Concentrated liquid supply pump 24 Concentrated liquid supply valve 26 Discharge port 27 Discharge valve 30, 31 Flowmeter 32 Supply pipe Road 32a Air supply port 42 On-off valve X Center vertical axis

Claims (7)

A dilution tank, a water supply line for supplying water to the dilution tank, a manually operated water supply valve disposed on the water supply line, and an alcohol undiluted solution to the dilution tank A stock solution supply line, a manually operated stock solution supply valve disposed on the stock solution supply line, a stock solution supply pump connected to the stock solution supply line, water into the dilution tank, A flow meter for grasping the supply amount of the alcohol stock solution, an air supply port arranged at the bottom of the dilution tank, an air supply line for pumping air to the air supply port, and the dilution An alcohol diluting device, wherein the water supply valve and the undiluted solution supply valve are disposed at a position where the flow meter can be operated while observing the flow meter. The bottom surface of the dilution tank is a bottom-type bottom surface, an opening is formed at the center of the bottom surface, a discharge pipe line communicates with the opening, and a manually operated discharge valve is provided on the discharge pipe line. The alcohol dilution device according to claim 1, wherein the discharge port is formed downstream of the discharge valve, and the air supply port is located in the discharge pipe. The dilution tank is of a vertical cylindrical shape, and is guided in the circumferential direction guided to the inner peripheral surface of the tank by the stock solution discharged from the opening end of the stock solution supply pipe in the tank. An opening end in the tank of the stock solution supply pipe is directed toward the circumferential direction of the dilution tank in the lower part of the dilution tank and in the vicinity of the inner peripheral surface of the dilution tank so that a rotating liquid flow is generated. The alcohol dilution apparatus according to claim 1, wherein the alcohol dilution apparatus is disposed. The alcohol diluting device according to claim 1 or 2, wherein an opening end in the tank of the stock solution supply pipe is disposed upward in a lower portion in the dilution tank. The open end portion in the tank of the stock solution supply pipe is disposed obliquely upward toward the central longitudinal axis from a position shifted laterally from the central longitudinal axis of the dilution tank in the lower part in the dilution tank. The alcohol dilution apparatus according to claim 4. The alcohol dilution apparatus according to any one of claims 1 to 5, wherein the dilution tank has a vertically long cylindrical shape. The air supply line is communicated with the water supply line and the stock solution supply line through an on-off valve, and the air is pumped by opening the on-off valve, so that the air supply line and the stock solution supply line The alcohol dilution according to any one of claims 1 to 6, wherein water and alcohol stock solution remaining downstream from the water supply valve and the stock solution supply valve are pushed out into the dilution tank. apparatus.

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