JP2007044616A - Liquid mixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extremely compact liquid mixing device capable of effectively mixing liquids each other. <P>SOLUTION: The liquid mixing device 1 is equipped with: a mixing tank 2 provided with a turbulence generating member 5 composed of multistage panels 5a to 5d arranged with prescribed intervals; first piping 8 connected to the liquid inflow port 7 of the mixing tank 2; a first pump for pressure-feeding a liquid A to the mixing tank 2 via the first piping 8; second piping 9 connected to the lower part of the mixing tank 2 or to the first piping 8; and a second pump for pressure-feeding a liquid B to the lower part of the mixing tank 2 or to the first piping 8 via the second piping 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid mixing apparatus, for example, a liquid mixing apparatus that performs neutralization by mixing a pH adjusting liquid with wastewater.

  One of the treatments of wastewater discharged from factories and laboratories is neutralization treatment. Various apparatuses for neutralizing such waste liquid have been proposed. For example, waste water whose pH fluctuates greatly is accepted, and acid or alkali is automatically injected to roughly neutralize the pH within a range of about 3 to 11. A receiving tank, a continuous neutralizing tank that receives a liquid that has been roughly neutralized from the receiving tank, and an injection amount that is adjusted according to the pH of the receiving tank, while being turned on and off according to the pH of the continuous neutralizing tank There has been proposed a neutralization apparatus comprising a chemical injection pump for injecting acid or alkali into a continuous neutralization treatment tank and a monitoring tank provided at the subsequent stage of the continuous neutralization treatment tank (see Patent Document 1). In such an apparatus, first, waste water is introduced into a treatment tank, a pH adjusting agent is injected into the treatment tank and the stirring blade is rotated to stir, and the final pH is adjusted in a monitoring tank communicated through a pipe. After confirming and introducing it into the settling tank, it is configured to discharge, and the apparatus is enlarged. Such a device is not particularly problematic when a relatively large amount of wastewater is treated and the installation location of the device is sufficient, but when a relatively small amount of wastewater is treated or there is a margin in the installation location of the device. If not, it becomes a big problem.

JP-A-5-317866

  An object of the present invention is to provide a very compact liquid mixing apparatus capable of effectively mixing liquids.

  As a result of intensive research aimed at reducing the size of a conventional large-scale apparatus in which the processing tanks are arranged in parallel, the present inventor has a turbulent flow generation member composed of multi-stage panels arranged at predetermined intervals. Two or more kinds of liquids are injected from below the mixing tank, and the turbulent flow is generated by the turbulent flow generating member to mix the liquids effectively, and the stirring means having a stirring blade, etc. Therefore, the present invention has been completed by finding that the apparatus itself is very compact.

  That is, the present invention includes (1) a mixing tank having a liquid inlet at the bottom and a turbulent flow generation member composed of multi-stage panels arranged at predetermined intervals, and connected to the liquid inlet of the mixing tank A first pump for pumping the liquid A to the mixing tank via the first pipe, a second pipe connected to the lower part of the mixing tank or the first pipe, A liquid mixing apparatus comprising a second pump for pumping the liquid B to the lower part of the mixing tank or the first pipe through the second pipe, or (2) a part or all of the top of the mixing tank And the liquid mixing apparatus according to (1) above, wherein a determination tank for determining the suitability of the liquid mixing state is provided above the mixing tank. A mixing tank whose storage tank is adjacent to the tank and whose mixing state is determined to be appropriate in the determination tank The liquid mixing device according to (1) or (2) above, or (4) the discrimination tank is configured to flow into the storage tank beyond the weir of the discrimination tank. And a liquid mixing device according to any one of the above (1) to (3), and (5) a liquid outlet of the discrimination tank. The liquid mixing apparatus as described in (4) above, wherein the opening / closing means for opening and closing is a single hinge type opening / closing means.

  Moreover, this invention is (6) the liquid mixing apparatus in any one of said (1)-(5), wherein the panel of a turbulent flow generation member is a panel which has an opening, (7) Mixing tank Any one of the above (1) to (6), wherein the turbulent flow generating member is configured by alternately arranging a panel having an opening in the center and a panel having an opening in the peripheral part. (8) The lowermost panel is placed on the panel fixing portion provided on the inner periphery of the mixing tank, and the panel is placed in a superimposed manner via a spacer. The liquid mixing apparatus according to any one of (1) to (7) above, (9) the liquid mixing apparatus according to (8) above, wherein the panel is removable, and (10) The above (characterized in that the liquid A is waste water and the liquid B is a pH adjusting liquid ( ) Relates to a liquid mixing apparatus according to any one of - (9).

  The liquid mixing apparatus of the present invention is very compact and can effectively mix liquids.

  The liquid mixing apparatus of the present invention has a liquid inlet at the bottom and a mixing tank provided with a turbulent flow generation member composed of multi-stage panels arranged at predetermined intervals, and a liquid inlet of the mixing tank. A first pipe connected, a first pump for pumping the liquid A to the mixing tank via the first pipe, a second pipe connected to the lower part of the mixing tank or the first pipe, There is no particular limitation as long as the liquid mixing apparatus includes a second pump that pumps the liquid B to the lower part of the mixing tank or the first pipe through the second pipe, and the liquid B is mixed with the liquid A. As well as liquid B, liquid C, liquid D... Can be mixed using a pump through a pipe, and the apparatus of the present invention simply mixes liquid A and liquid B and mixes them. Not only as a mixing device for producing liquids, but also for example in laboratories, laboratories, Can be used waste water discharged from the error such as a neutralizer or the like for neutralization.

  The mixing tank is not particularly limited as long as it has a liquid inlet at the bottom and is provided with a turbulent flow generation member composed of multi-stage panels arranged at predetermined intervals. As a capacity | capacitance, it is about 10-100L, for example.

  Examples of the turbulent flow generating member include a panel having about 2 to 15 stages, and a panel having about 3 to 10 stages is preferable. The number of stages of the panel can be appropriately determined depending on the liquid processing amount (inflow amount), and it is preferable that the panel can be removed so that the panel can easily correspond to the liquid processing amount. For example, when the liquid throughput increases, the number of panel stages is increased. Specifically, the panel can be placed on a panel fixing part (convex part) provided on the inner periphery of the mixing tank, and the panel can be placed in a superimposed manner via a spacer. The panel can be easily attached and removed from above.

  Further, the turbulent flow generation member is not particularly limited as long as a plurality of panels that can secure a liquid flow path are multi-staged. For example, panels having openings with different positions and sizes are multi-staged. Or a combination of these plate-like members that do not have openings with a shape that can secure a liquid flow path, or a combination of these. Therefore, it is preferable that a panel having an opening at the center and a panel having an opening at the periphery are alternately arranged.

  Moreover, as a mixing tank, it is preferable that part or all of the top part is open | released, for example, the structure which connected piping directly to the open part of the top part may be sufficient, but above a mixing tank, It is preferable that a discrimination tank for discriminating the suitability of the liquid mixing state is provided. That is, for example, when neutralization is performed by injecting a pH adjusting liquid into wastewater, the determination tank detects the pH with a pH detector and determines whether or not it is within a predetermined pH range. In the case of a process for injecting hot water into cold water to produce hot water at a predetermined temperature, the discrimination tank detects the temperature with a thermometer and is within a predetermined temperature range. It becomes a tank for distinguishing.

  Moreover, it is preferable that the discrimination tank includes a liquid outlet and an opening / closing means for opening and closing the liquid outlet. That is, when the determination unit of the determination tank determines that the mixing state is inappropriate, the liquid outlet is immediately opened by the opening / closing means, and the liquid mixture is supplied to the liquid A via the liquid return pipe connected to the liquid outlet. Or may be pumped by a pump to the lower part of the mixing tank or the pipe.

  Examples of such opening / closing means include a means provided with a closing member capable of closing the liquid outlet and a rod-like member fixed to the closing member, and is perpendicular to the wall surface provided with the liquid outlet. Although it may be movable in the direction, it is preferably a single hinge type opening / closing means provided with a hinge on one side of the opening / closing means, and by fixing the rod-shaped member in the vicinity of the hinge, the stroke of the rod-shaped member is reduced. Even if it is made small, the liquid outlet can be sufficiently opened.

  Further, the determination tank is provided with a storage tank adjacent thereto, and the mixed liquid whose mixing state is determined to be appropriate in the determination tank flows into the storage tank over the weir of the determination tank. It is preferable. As a result, even if a part of the treated water deemed inappropriate in the discrimination tank does not flow out from the liquid outlet, the inappropriate liquid mixture in the storage tank can be diluted, and the mixed state is partially It can prevent becoming an unfavorable mixed liquid, and is effective particularly in a neutralizing apparatus for neutralizing waste water. In addition, since the two liquid tanks are adjacent to each other and pass over the weir, the mixed liquid flows into the apparatus, so that the apparatus itself is compact even though the storage tank is provided.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. However, the technical scope of the present invention is not limited to these examples. FIG. 1 is a schematic view of a liquid mixing apparatus according to an embodiment of the present invention, FIG. 2 is a view of the apparatus shown in FIG. 1, and FIG. 3 is a view of the apparatus shown in FIG. FIG. 4 is an enlarged view around the discrimination tank, and FIG. 4 is an explanatory diagram of a turbulent flow generating member in the mixing tank.

  As shown in FIGS. 1 to 3, the liquid mixing apparatus 1 according to an embodiment of the present invention is provided adjacent to the mixing tank 2, the discrimination tank 3 provided above the mixing tank 2, and the discrimination tank 3. The storage tank 4 is provided, and is a device that performs neutralization treatment by mixing a pH adjuster (liquid B) with waste water (liquid A) discharged from the laboratory. Reference numeral 18 denotes a pH adjusting liquid container.

  As shown in FIGS. 2 and 4, the mixing tank 2 is a cylindrical tank made of stainless steel having a diameter of about 30 cm and a depth of about 30 cm. A turbulent flow generating member 5 comprising four panels 5a to 5d arranged at predetermined intervals is provided. In such a turbulent flow generating member 5, panels 5 a and 5 c having an opening 19 having a diameter of about 12 cm in the center and panels 5 b and 5 d having four openings having a diameter of about 3 cm in the periphery are alternately arranged via a spacer 6. It is arranged. The four-stage panels 5 a to 5 d are arranged such that the lowermost panel 5 d is placed on the panel fixing portion 20 provided along the inner periphery of the mixing tank 2, and the panels 5 b to 5 d are overlapped via the spacer 6. Is placed.

  A liquid inlet 7 having a diameter of about 10 cm is provided at the bottom of the mixing tank 2, and a pipe 8 (first pipe) is connected to the liquid inlet 7. Waste water (liquid A) is introduced into the mixing tank 2 by the first pump through the pipe 8. A pipe 9 (second pipe) is connected to the vicinity of the mixing tank 2 of the pipe 8, and the pH adjuster (liquid B) is pumped by the second pump through the pipe 9. When the waste water (liquid A) and the pH adjusting agent (liquid B) are vigorously introduced from below the mixing tank 2, the turbulent flow generating member 5 forms a turbulent flow and is effectively mixed.

  Further, the discrimination tank 3 provided above the mixing tank 2 is a tank having a length of about 40 cm, a width of 40 cm, and a depth of about 10 cm, and the weir 10 portion is about 5 cm. And a discriminating means for discriminating between. The discriminating unit discriminates whether or not the pH value is within a predetermined range based on the pH value by the pH detector.

  A liquid outlet 11 having a diameter of about 10 cm is provided at the bottom of the discrimination tank 3 and a liquid return pipe 12 is connected thereto. The other end of the liquid delivery pipe 12 is connected to a wastewater (liquid A) storage tank (not shown). The liquid outlet 11 is provided with opening / closing means 13 for opening and closing the liquid outlet 11. The opening / closing means 13 is a one-hinge type opening / closing member in which a rod-like member 16 is attached in the vicinity of the hinge of a closing member 15 provided with a hinge 14 on one side, and is driven by a solenoid 17. That is, when the determination means determines that the pH value is outside the predetermined range (the mixing state is inappropriate), the rod-like member 16 is pulled up, the liquid outlet 11 is opened, and the liquid delivery pipe 12 is used. The mixed solution is returned to the waste water (liquid A) storage tank.

  The storage tank 4 provided next to the discrimination tank 3 is a tank having a length of about 40 cm, a width of 30 cm, and a depth of about 50 cm. It flows over the weir 10. Thereafter, it is discharged through the pipe 18.

  The liquid mixing apparatus 1 according to an embodiment of the present invention as described above is very compact, and effectively mixes waste water (liquid A) and a pH adjuster (liquid B) to ensure neutralization. The discharged waste liquid can be discharged.

It is the schematic of the liquid mixing apparatus which concerns on one Embodiment of this invention. FIG. 2 is a view of the device shown in FIG. FIG. 2 is an enlarged view around a discrimination tank of the apparatus shown in FIG. 1. It is explanatory drawing of the turbulent flow generation member in a mixing tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid mixing apparatus 2 Mixing tank 3 Discriminating tank 4 Storage tank 5a Panel 5b Panel 5c Panel 5d Panel 5 Turbulence generating member 6 Spacer 7 Liquid inlet 8 1st piping 9 2nd piping 10 Weir 11 Liquid outlet 12 Liquid return piping 13 Opening / closing means 14 Hinge 15 Closing member 16 Bar-shaped member 17 Solenoid 18 pH adjusting liquid container 19 Opening 20 Panel fixing part

Claims (10)

A mixing tank having a liquid inlet at the bottom and provided with a turbulent flow generation member composed of multi-stage panels arranged at predetermined intervals; a first pipe connected to the liquid inlet of the mixing tank; A first pump for pumping the liquid A to the mixing tank via the first pipe, a second pipe connected to the lower part of the mixing tank or the first pipe, and a liquid B via the second pipe And a second pump for pressure-feeding the liquid to the lower part of the mixing tank or the first pipe. 2. The liquid according to claim 1, wherein a part or all of the top of the mixing tank is opened, and a discrimination tank is provided above the mixing tank to discriminate suitability of the liquid mixing state. Mixing equipment. A storage tank is provided adjacent to the discrimination tank, and the mixed liquid whose mixing state is determined to be appropriate in the discrimination tank flows into the storage tank beyond the weir of the discrimination tank. Item 3. The liquid mixing apparatus according to Item 1 or 2. The liquid mixing apparatus according to claim 1, wherein the discrimination tank includes a liquid outlet and an opening / closing means for opening and closing the liquid outlet. 5. The liquid mixing apparatus according to claim 4, wherein the opening / closing means for opening / closing the liquid outlet of the discrimination tank is a single hinge type opening / closing means. The liquid mixing apparatus according to claim 1, wherein the panel of the turbulent flow generation member is a panel having an opening. The turbulent flow generating member of the mixing tank is configured by alternately arranging a panel having an opening at a central portion and a panel having an opening at a peripheral portion. Liquid mixing equipment.   The lowermost panel is placed on a panel fixing portion provided on the inner periphery of the mixing tank, and the panel is placed in a superimposed manner via a spacer. A liquid mixing apparatus according to 1. The liquid mixing apparatus according to claim 8, wherein the panel is removable. The liquid mixing apparatus according to claim 1, wherein the liquid A is waste water and the liquid B is a pH adjusting liquid.