JP3218782U - PH processing equipment - Google Patents

Abstract

A PH treatment device that solves the blockage caused by adhesion of calcium carbonate is provided.
A PH treatment device includes an outer tub 24 having a treated water discharge portion 29 on an upper end side portion, an inner cylinder 26 disposed inside the outer tub 24 and having a gutter 26a around the entire upper end portion; The raw water supply pipe 27 that is arranged in communication with the inner cylinder 26 and is detachably attached to the gutter 26a of the inner cylinder 26, and communicates with the inner cylinder 26 and the raw water supply pipe 27, and A nozzle member 32 that is sandwiched between the flange plate 26 a of the tube 26 and forms a tapered taper channel 31 toward the inner tube 26, and is inserted into the raw water supply pipe 27, and a tip portion is tapered of the nozzle member 32. A carbon dioxide gas supply pipe 28 extending into the tapered channel 31 is provided, and the alkaline raw water ejected from the nozzle member 32 and the carbon dioxide gas ejected from the tip of the carbon dioxide gas supply pipe 28 are mixed in the inner cylinder 26. Carbon dioxide reaction Equipped with a 2.
[Selection] Figure 7

Description

The present invention relates to an improvement of a device for treating PH of highly alkaline raw water discharged from a construction site or various factories with carbon dioxide gas, and in particular, carbon dioxide gas can be efficiently mixed and dissolved in highly alkaline raw water. It is possible to significantly reduce the consumption of carbon dioxide gas, and a large amount of calcium carbonate generated when neutralizing highly alkaline raw water with carbon dioxide gas adheres to the inside of the waste liquid supply pipe and the nozzle part and clogs. The present invention relates to a PH processing apparatus including a carbon dioxide reaction tank for a PH processing apparatus that can solve the problem.

Furthermore, when constructing a PH treatment device, it relates to a PH treatment device capable of reducing the total cost by reducing the number of members brought into the construction site and reducing the number of man-hours required for construction, thereby saving energy and space. It is.

For the treatment of highly alkaline raw water (waste liquid) discharged from construction sites and various factories such as washing water and boiler drainage of concrete mixer trucks, PH treatment using acidic liquids such as sulfuric acid and hydrochloric acid as neutralizing agents The device has been used. However, the PH treatment apparatus using an acid solution as a neutralizing agent has a relatively high risk, and requires a large installation place. In addition, there is a problem that it takes time to maintain the apparatus. Moreover, when constructing the PH treatment apparatus, there are many members brought into the construction site, and there is a problem that it takes time and effort.

Therefore, as an alternative, a PH treatment apparatus using carbon dioxide as a neutralizing agent has been developed, and in recent years, a PH treatment apparatus using carbon dioxide as a neutralizing agent has been widely put into practical use for the treatment of this kind of highly alkaline raw water. ing.

In recent years, a PH treatment apparatus having a reaction tank 40 configured as shown in FIG. 12 in which a submersible pump is installed outside the reaction tank 40 has been developed. The gas reuse rate is improved.

That is, in FIG. 12, 40 is a reaction tank, 44 is an ejector, 51 is an outlet for treated waste liquid 42 ', 52 is a gas reservoir, 53 is a gas passage, 54 is a waste liquid supply pipe, and 55 is a press-fit of carbon dioxide gas 46. A carbon dioxide gas cylinder and a waste liquid supply pump are not shown in the figure.

The waste liquid 42 is ejected from the waste liquid supply pipe 54 into the reaction tank 40 through the ejector 44 by pump pressurization. The carbon dioxide gas 46 is pressed into the waste liquid supply pipe 54 outside the reaction tank 40, and the waste liquid 42 mixed and dissolved with the carbon dioxide gas 46 is ejected from the tip of the ejector 44. Further, the unreacted portion of the carbon dioxide gas 46 mixed in the waste liquid 42 moves upward in the waste liquid 42 and stays in the upper space of the reaction tank 40 (that is, the gas reservoir 52).

Further, a so-called vacuum suction force is generated in the interior of the ejector 44 due to the operation of the ejector 44, and the waste liquid 42 in which the unreacted carbon dioxide gas 46 ′ in the gas reservoir 52 circulates in the ejector 44 through the gas passage 53 by this vacuum suction force. It will be mixed again.

In the reaction tank 40 having the structure shown in FIG. 12, although the reaction tank 40 can be downsized, the unreacted residual carbon dioxide gas 46 ′ is easily removed from the outlet 51 together with the treated waste liquid 42 ′. The recovery rate of so-called unreacted residual carbon dioxide gas 46 ′ is low, and the consumption of carbon dioxide gas 46 cannot be significantly reduced.

Further, since the waste liquid 42 and the carbon dioxide gas 46 are mixed inside the waste liquid supply pipe 54, there is a problem that a large amount of calcium carbonate generated upon reaction adheres to the inside of the waste liquid supply pipe 54 and its nozzle portion and is blocked. .

In this case, by using the reaction tank 40 configured as shown in FIG. 13 and FIG. 14, a large amount of calcium carbonate generated when the waste liquid 42 reacts with the carbon dioxide gas 46 is generated in the waste liquid supply pipe 54 and its nozzle portion. The problem of sticking and blocking is reduced.

13 and 14, 40 is a reaction tank, 51 is an outlet for the treated waste liquid 42 ', 52 is a gas reservoir, 54 is a waste liquid supply pipe, and 55 is a press-fit pipe for carbon dioxide 46. The waste liquid supply pump is not shown. FIG. 14 is an enlarged view of the upper part of FIG. In FIG. 13, solid arrows indicate the flow of carbon dioxide gas 46, and broken arrows indicate the flow of waste liquid 42.

Carbon dioxide gas is jetted into the reaction tank 40 from above the press-in pipe 55 of the carbon dioxide gas 46 installed so as to enclose the nozzle part of the waste liquid supply pipe 54. Further, the waste liquid 42 is ejected from the nozzle part of the waste liquid supply pipe 54 through the lower half of the press-fitting pipe 55 of the carbon dioxide gas 46 into the reaction tank 40. And the waste liquid 42 and the carbon dioxide gas 46 are mixed in the lower half part of the press injection pipe 55 and the reaction tank 40.

In the reaction tank 40 having the structure shown in FIGS. 13 and 14, a large amount of calcium carbonate generated when the waste liquid 42 reacts with the carbon dioxide gas 46 adheres to the inside of the waste liquid supply pipe 54 and its nozzle portion and is blocked. The problem has been reduced. However, in the lower half portion of the press-fit pipe 55 in which the waste liquid 42 and the carbon dioxide gas 46 are mixed, there is still a problem that calcium carbonate adheres. Moreover, when constructing a PH processing apparatus, there are many members brought into the construction site, and the problem that it takes time and effort has not been solved.

JP 2001-340878 A JP-A-11-169868

The present invention has the above-mentioned problems in the conventional PH treatment apparatus, that is, the problem that the consumption of carbon dioxide gas cannot be sufficiently reduced, and the waste liquid and the carbon dioxide gas are mixed inside the waste liquid supply pipe. An object of the present invention is to provide a PH treatment apparatus equipped with a carbon dioxide reaction tank for a PH treatment apparatus capable of solving the problem that a large amount of calcium carbonate generated in the liquid adheres to and clogs the inside of the waste liquid supply pipe and the nozzle part. It is what.

Furthermore, when constructing a PH treatment device, we provide a PH treatment device that can reduce the total cost by reducing the number of members brought into the construction site and reducing the number of man-hours required for construction, thereby saving energy and space. It is intended to do.

The PH treatment device according to claim 1 includes an outer tub having a treated water discharge portion on an upper end side portion, an inner cylinder disposed inside the outer tub and having a girdle covering the entire upper end portion, and the inner A raw water supply pipe disposed in communication with the cylinder and detachably attached to the gutter plate of the inner cylinder, and communicated with the inner cylinder and the raw water supply pipe, and the bottle of the raw water supply pipe and the inner cylinder A nozzle member sandwiched by a plate and forming a tapered taper flow path toward the inner cylinder; and a carbonic acid inserted into the raw water supply pipe and having a tip extending into the taper taper flow path of the nozzle member A carbon dioxide reaction tank comprising a gas supply pipe, wherein alkaline raw water ejected from the nozzle member and carbon dioxide gas ejected from the tip of the carbon dioxide supply pipe are mixed in the inner cylinder. The carbon dioxide gas reaction tank is provided. .

The PH treatment device according to claim 2 is the PH treatment device according to claim 1, wherein the nozzle member has a short cylindrical shape having a flange over the entire periphery of the lower end, and the flange is connected to the raw water supply pipe. It is sandwiched between the inner cylinder plate and the inner cylinder.

The PH processing apparatus according to claim 3 is the PH processing apparatus according to claim 1 or 2, wherein the nozzle member is made of an elastic material.

The PH treatment apparatus according to claim 4 is the PH treatment apparatus according to any one of claims 1 to 3, wherein the raw water automatic pump, the raw water pump outlet to which the raw water automatic pump is connected, and the automatic discharge A discharge pump outlet to which the pump and the automatic discharge pump are connected; and a control panel for controlling the supply amount of carbon dioxide gas; and the raw water pump outlet and the discharge pump outlet are provided inside the control panel. It is characterized by the arrangement.

The PH treatment device according to claim 5 is the PH treatment device according to claim 4, wherein a current detector is disposed inside the control panel, and a current when the raw water automatic pump is activated is detected by the current detection. Carbon dioxide gas is supplied to the carbon dioxide reaction tank by detecting with a vessel.

The PH treatment apparatus according to claim 6 is the PH treatment apparatus according to any one of claims 1 to 3, wherein a residence tank is continuously provided at a side portion of the carbon dioxide reaction tank, and a side portion of the residence tank. A discharge tank is continuously provided, a first partition plate having an opening at the upper end portion is erected on the boundary surface between the carbon dioxide reaction tank and the retention tank, and an upper end portion is opened at the boundary surface between the retention tank and the discharge tank. And moving the treated water in the order of the carbon dioxide reaction tank, the opening of the first partition plate, the retention tank, the opening of the second partition plate, and the discharge tank. It is a feature.

The PH treatment apparatus according to claim 7 is the PH treatment apparatus according to claim 6, wherein the carbon dioxide reaction tank, the residence tank, and the discharge tank are formed in a substantially rectangular parallelepiped shape, and a longitudinal direction of the carbon dioxide reaction tank A side portion in the short direction of the retention tank and a side portion in the short direction of the discharge tank are connected to the side of the carbon dioxide reaction tank, the retention tank, and the discharge tank as a whole. A rectangular parallelepiped shape is formed.

The PH treatment apparatus according to claim 8 is the PH treatment apparatus according to claim 6 or 7, wherein the discharge tank having a substantially rectangular parallelepiped shape is provided in the stay tank, and the stay tank and the discharge tank. The outer surface of the discharge tank that forms the boundary surface with the second partition plate is used.

The PH treatment apparatus according to claim 9 is the PH treatment apparatus according to claim 8, wherein the outer surface of one of the front discharge tanks is detachably attached to the outer surface of one of the staying tanks. A discharge tank is provided in the staying tank.

The PH treatment apparatus according to claim 10 is the PH treatment apparatus according to any one of claims 6 to 9, wherein the PH treatment apparatus has a cover plate that can be attached to and detached from the outer tank of the carbon dioxide reaction tank. It is connected with the said board.

The PH processing device according to claim 11 is the PH processing device according to any one of claims 1 to 3, wherein guide portions are formed on both sides of an upper end of the PH processing device, and on both sides of a lower end of the PH processing device. A plurality of PH processing devices are formed by forming a leg portion engageable with the guide portion and engaging a guide portion of a PH processing device disposed below and a leg portion of a PH processing device disposed above. It is characterized in that it can be stacked vertically.

In the carbon dioxide reaction tank 2 used in the PH treatment apparatus 1 according to the present invention, an inner cylinder 26 is disposed inside an outer tank 24, a raw water supply pipe 27 is communicated with the inner cylinder 26, and a nozzle member 32 is connected to the inner cylinder 26. The carbon dioxide gas supply pipe 28 is inserted into the raw water supply pipe 27 and the alkaline raw water ejected from the nozzle member 32 through the raw water supply pipe 27 and the carbon dioxide gas ejected from the carbon dioxide supply pipe 28 Mixing is performed in the cylinder 26.

That is, since alkaline raw water and carbon dioxide are not mixed in the raw water supply pipe 27 but mixed in the inner cylinder 26, calcium carbonate generated when the alkaline raw water reacts with carbon dioxide is supplied to the raw water. It is difficult to adhere to the inside of the tube 27, the carbon dioxide gas supply tube 28, and the nozzle member 32.

Further, the alkaline raw water ejected from the nozzle member 32 has a truncated cone shape along the tapered tapered flow path 31 of the nozzle member 32. Further, the carbon dioxide gas supply pipe 28 communicates with the nozzle member 32, and the tip thereof extends into the tapered taper channel 31 of the nozzle member 32. Carbon dioxide will be ejected from the top of the raw water.

Then, the ejected carbon dioxide gas always adheres to the alkaline raw water and dissolves at the same time as the ejection. Further, when the raw alkaline water is continuously ejected in a truncated cone shape, the mixed raw water of the alkaline raw water and carbon dioxide gas collides with each other and becomes finer, and the surface area of the liquid increases. As a result, the solubility of carbon dioxide gas is improved, and the amount of carbon dioxide gas required for neutralization of alkaline raw water is reduced.

Further, the raw water supply pipe 27 is detachably attached to the wall plate 26a of the inner cylinder 26, and the nozzle member 32 communicating with the inner cylinder 26 and the raw water supply pipe 27 is connected to the wall plate 25 of the inner cylinder 26 and the raw water supply. Since the nozzle member 32 can be attached / detached by attaching / detaching the raw water supply pipe 27 to / from the gutter plate 26a, the nozzle member 32 as one component can be easily replaced.

Further, since the nozzle member 32 has a short cylindrical shape having a flange portion 32a over the entire circumference of the lower end portion, and the flange portion 32a is sandwiched between the raw water supply pipe 27 and the flange plate 26a of the inner cylinder 26, the nozzle member 32 The function as a sealing material for improving the airtightness between the raw water supply pipe 27 and the inner cylinder 26 can be exhibited. Thereby, the carbon dioxide gas injected into the raw water is used without waste.

Moreover, the function as a sealing material can be improved by comprising the nozzle member 32 with an elastic material, and the carbon dioxide gas injected into raw | natural water will be used more wastefully.

The raw water automatic pump 9 is connected to the raw water outlet 13 in the control panel 5, and the discharge automatic pump 17 is connected to the discharge outlet 14 in the control panel 5 to enter the operation state. This eliminates the need for float switch installation, wiring, individual control panels, and the like. That is, the number of members required for construction can be reduced by reducing the number of members brought into the construction site. That is, energy saving can be achieved and total cost can be reduced.

Furthermore, a current detector 12 for detecting a current when the raw water automatic pump 9 is operated is installed and linked to the raw water automatic pump 9. That is, when raw water is stored in the raw water tank 18, the raw water automatic pump 9 is activated, the current detector 12 detects the current generated at that time, and the electromagnetic valve 16 can be opened, that is, a carbon dioxide reaction. Since the carbon dioxide gas can be supplied into the tank 2 in a standby state, the carbon dioxide gas can be supplied into the carbon dioxide reaction tank 2 more smoothly and quickly when necessary. Moreover, since the current detector 12 is arranged inside the control panel 5, the number of members required for construction can be reduced by reducing the number of members brought into the construction site.

Moreover, the PH treatment apparatus 1 according to the present invention includes a carbon dioxide reaction tank 2, a retention tank 3, and a discharge tank 4 '. The residence tank 3 is connected to the side of the carbon dioxide reaction tank 2, A discharge tank 4 ′ is connected to the side of the staying tank 3, and a first partition plate 19 having an opening at the upper end is erected on the boundary surface between the carbon dioxide reaction tank 2 and the staying tank 3. A second partition plate 20 having an opening at the upper end is erected on the boundary surface with the discharge tank 4 ′, the carbon dioxide reaction tank 2, the opening of the first partition plate 19, the staying tank 3, and the openings of the second partition plate 20. Since the treated water is moved in the order of the discharge tank 4 ′, the treated water is lost, and the residence time of the treated water staying in the carbon dioxide gas reaction tank 2, the retention tank 3, and the discharge tank 4 ′ is kept long. Can do. Thereby, PH value of treated water can be stabilized.

Further, the carbon dioxide reaction tank 2, the retention tank 3, and the discharge tank 4 ′ are formed in a substantially rectangular parallelepiped shape, and the side part in the short direction of the retention tank 3 and the discharge tank 4 are disposed on the side in the longitudinal direction of the carbon dioxide reaction tank 2. Since the side portion in the short direction of 'is continuously provided, the treated water neutralized in the carbon dioxide reaction tank 2 surely passes through the longitudinal direction of the staying tank 3, so that the pH value of the treated water is further increased. It can be stabilized.

Further, since the carbon dioxide reaction tank 2, the retention tank 3 and the discharge tank 4 ′ form a substantially rectangular parallelepiped shape as a whole, in the PH treatment apparatus 1, the carbon dioxide reaction tank 2, the retention tank 3, and the discharge tank 4. The space occupied by 'can be minimized and space saving can be achieved.

Moreover, since the detachable discharge tank 4 ′ is installed in the stay tank 3, the discharge tank 4 ′ can be easily installed in the stay tank 3, and only the discharge tank 4 ′ is removed for maintenance. Can be easily maintained. That is, energy saving can be achieved and total cost can be reduced.

Further, in the substantially rectangular parallelepiped discharge tank 4 ′, the outer surface 4a of the discharge tank 4 ′ forming the boundary surface between the retention tank 3 and the discharge tank 4 ′ is used as the boundary surface between the retention tank 3 and the discharge tank 4 ′. The second partition plate 20 is provided. Thereby, since the said 2nd partition plate 20 can be shared by the outer surface 4a of the discharge tank 4 ', the number of parts can be reduced and the total cost can be reduced.

Moreover, since the discharge tank 4 'is installed in the retention tank 3 by detachably attaching one outer surface 4b of the discharge tank 4' to one outer surface 3a of the retention tank 3, the discharge tank 4 It becomes easier to attach and remove the 'to and from the staying tank 3. That is, further energy saving can be achieved, and further reduction of the total cost can be achieved.

Further, the cover plate 25 is detachably attached to the outer tank 24 of the carbon dioxide reaction tank 2, and the cover plate 25 is connected to the flange plate 26 a of the inner cylinder 26. That is, the raw water supply pipe 27, the carbon dioxide gas supply pipe 28, the nozzle member 32, and the inner cylinder 26 are integrally connected to the cover plate 25 to constitute the neutralization mechanism section 23 as a whole. The outer tub 24 is detachable.

Thereby, the neutralization mechanism part 23 can be easily installed in the carbon dioxide gas reaction tank 2, and in the case of maintenance, only the neutralization mechanism part 23 can be removed and maintenance is facilitated. That is, energy saving can be achieved and total cost can be reduced.

Further, guide portions 34a and 34b are formed on both side portions of the upper end of the PH processing device 1, and leg portions 33a and 33b that can be engaged with the guide portions 34a and 34b are formed on both side portions of the lower end of the PH processing device 1. This is lifted using the gap between the legs 33a and 33b of the PH processing apparatus 1 to be disposed, and the legs of the PH processing apparatus 1 disposed above the guide sections 34a and 34b of the PH processing apparatus disposed below. By engaging the parts 33a and 33b, a plurality of PH processing apparatuses 1 can be stacked vertically.

Thereby, when storing several PH processing apparatus 1, it can store vertically. If it does so, the space saving at the time of storage can be aimed at, and reduction of a total cost can be aimed at.

It is a top view which shows an example of PH processing apparatus which concerns on this invention. It is a front view of PH processing apparatus. It is a left view of PH processing apparatus. It is a right view of PH processing apparatus. It is a schematic explanatory drawing of the raw | natural water processing system | strain of PH processing apparatus. It is the slope figure which made some PH processing apparatuses transparent. It is outline | summary explanatory drawing (1) of the carbon dioxide reaction tank used for the PH processing apparatus which concerns on this invention. It is outline | summary explanatory drawing (2) of the carbon dioxide reaction tank used for the PH processing apparatus which concerns on this invention. It is a diagram which shows the trend of PH value in this invention system of FIG. 7, and an ejector system. It is explanatory drawing decomposed | disassembled for every structural unit of PH processing apparatus. It is the perspective view which piled up the PH processing apparatus vertically. It is a general | schematic explanatory drawing of the carbon dioxide reaction tank (1) used for the PH processing apparatus of conventional alkaline wastewater. It is outline | summary explanatory drawing (1) of the carbon dioxide reaction tank (2) used for the PH processing apparatus of conventional alkaline wastewater. It is outline | summary explanatory drawing (2) of the carbon dioxide reaction tank (2) used for the PH processing apparatus of conventional alkaline wastewater.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view showing an example of a PH treatment apparatus according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a left side view of FIG. 1, and FIG. 4 is a right side view of FIG. . FIG. 5 is a schematic explanatory diagram of the raw water treatment system of the PH treatment apparatus. FIG. 6 is a perspective view in which a part of the PH processing apparatus is made transparent. FIG. 10 is an exploded view for each constituent unit of the PH processing apparatus.

First, an outline of the PH processing apparatus 1 according to the present invention will be described.
As shown in FIGS. 1 to 6, the PH treatment apparatus 1 includes a carbon dioxide reaction tank 2, a retention tank 3, a discharge tank 4 ′, a control panel 5, a carbon dioxide supply apparatus 6, a control PH electrode 7, a recording PH. An electrode 8 and a gate valve 35 are provided, and raw water (waste liquid) A having a maximum PH = 11 is supplied from the raw water tank 18 through the raw water inlet 10 from the raw water automatic pump 9 into the carbon dioxide reaction tank 2. The treated water neutralized by the dissolution of carbon dioxide C passes through the retention tank 3, stabilizes the PH value, and is discharged from the discharge tank 4 '. That is, the treated raw water B treated at PH 5.8 to 8.6 is discharged from the outlet 11 to the outside. In addition, when the PH value of the treated raw water B is other than 5.8 to 8.6, the PH treatment device 1 is stopped. Moreover, in this embodiment, the discharge pump chamber 4 in which the automatic pump 17 for the discharge pump mentioned later is incorporated is made into discharge tank 4 '. That is, although it demonstrates based on the example which has installed the discharge pump chamber 4 as discharge tank 4 'in the retention tank 3, it is not limited to this.

Table 1 shows the main specifications of the PH processing apparatus 1. The external dimensions of the apparatus are a width of 840 mm, a depth of 1050 mm, and a height of 1390 mm.

In FIG. 5, 15 is a pressure regulator of the carbon dioxide supply device 6, 16 is a solenoid valve, 19 is a first partition plate provided on the boundary surface between the carbon dioxide reaction tank 2 and the retention tank 3, and 20 is a retention. A second partition plate provided at the boundary surface between the tank 3 and the discharge tank 4 ′, 21 a peripheral plate provided around the recording PH electrode 8, 22 a carbon dioxide gas cylinder, and 18 a raw water tank. In addition, the broken line arrow in FIG. 5 shows the moving direction of treated water.

The control panel 5 further includes a current detector 12, a raw water pump outlet 13, a discharge pump outlet 14, a control circuit 5a, a PH indicator 5b, and a PH recorder 5c. The raw water automatic pump 9 is connected to the raw water pump outlet 13 in the control panel 5, and the discharge automatic pump 17 is connected to the discharge pump outlet 14 in the control panel 5 to enter the operation state. .

This eliminates the need for float switch installation, wiring, individual control panels, and the like. That is, the number of members required for construction is reduced by reducing the number of members brought into the construction site. That is, energy saving is achieved and total cost is reduced.

When raw water A is accumulated in the raw water tank 18, the raw water automatic pump 9 is activated. And the electric current at the time of the automatic pump 9 for raw | natural water operating is detected with the electric current detector 12, The standby state which can open the solenoid valve 16, ie, the standby state which can supply the carbon dioxide gas C in the carbon dioxide reaction tank 2 It becomes.

In this state, when the solenoid valve 16 is opened by a signal from the control circuit 5a based on the detected PH value of the control PH electrode 7 provided in the carbon dioxide reaction tank 2, carbon dioxide C is supplied into the carbon dioxide reaction tank 2. Will do. Thus, when necessary, the carbon dioxide gas C is supplied into the carbon dioxide reaction tank 2 more smoothly and quickly.

That is, the PH value detected by the control PH electrode 7 is displayed on the PH indicator 5b, and when the PH value is higher than a predetermined value, the electromagnetic valve 16 is opened by a signal from the control circuit 5a of the control panel 5. Carbon dioxide C is supplied to the carbon dioxide reaction tank 2.

The amount of carbon dioxide C supplied to the carbon dioxide reaction tank 2 is controlled by opening and closing the electromagnetic valve 16 by a signal from the control circuit 5a of the control panel 5 based on the detected PH value, so-called feedback. The raw water A is subjected to PH treatment by the control method.

Next, the structure of the carbon dioxide reaction tank 2, the staying tank 3, and the discharge tank 4 ′ of the PH treatment apparatus 1 according to the present invention will be mainly described.
Since the first partition plate 19 and the second partition plate 20 have a flat plate shape having an opening at the upper end, the neutralized treated water moving through the carbon dioxide reaction tank 2 is in contact with the first partition plate 19, Then, it passes through the opening at the upper end of the first partition plate 19 and moves to the retention tank 3.

The neutralized treated water that moves through the carbon dioxide reaction tank 2 is brought into contact with the first partition plate 19 so that a loss is given and the residence time in the carbon dioxide reaction tank 2 is kept long. Thereby, the PH value of the neutralized treated water moving through the carbon dioxide reaction tank 2 is stabilized.

The treated water that moves in the retention tank 3 contacts the second partition plate 20, and then passes through the opening at the upper end of the second partition plate 20 and moves to the discharge tank 4 '. The treated water that moves in the staying tank 3 is brought into contact with the second partition plate 20 so that a loss is given and the staying time in the staying tank 3 is kept long. Thereby, the PH value of the treated water moving through the retention tank 2 is stabilized.

Further, the peripheral plate 21 has a substantially L-shaped cross section, and the treated water moving in the vicinity of the recording PH electrode 8 is brought into contact with the recording PH electrode 8 in a uniform state by contacting the peripheral plate 21. Can do. Thus, a more accurate PH value is measured by the recording PH electrode 8.

Further, as shown in FIGS. 1 and 6, the carbon dioxide reaction tank 2, the retention tank 3, and the discharge tank 4 ′ are formed in a substantially rectangular parallelepiped shape, and the residence tank 3 is disposed on the longitudinal side of the carbon dioxide reaction tank 2. Since the side portion in the short direction and the side portion in the short direction of the discharge tank 4 ′ are connected in series, the treated water neutralized in the carbon dioxide gas reaction tank 2 ensures the longitudinal direction of the retention tank 3. Passing through, that is, passing through a longer distance further stabilizes the pH value of the treated water.

Further, since the carbon dioxide reaction tank 2, the retention tank 3 and the discharge tank 4 ′ form a substantially rectangular parallelepiped shape as a whole, in the PH treatment apparatus 1, the carbon dioxide reaction tank 2, the retention tank 3, and the discharge tank 4. The space occupied by 'is minimized to save space.

Here, the PH processing apparatus 1 according to the present invention has a detachable structure for each component unit, and facilitates installation and maintenance. This saves energy and reduces the total cost.

That is, as shown in FIG. 10, in this embodiment, the discharge pump chamber 4 in which the automatic pump 17 for the discharge pump is built is used as the discharge tank 4 '. That is, a discharge pump chamber 4 as a discharge tank 4 ′ is installed in the retention tank 3. And it is set as the structure which can install the discharge pump chamber 4 in the retention tank 3 so that attachment or detachment is possible. Moreover, it is set as the structure where the neutralization mechanism part 23 mentioned later can be installed in the carbon dioxide reaction tank 2 so that attachment or detachment is possible. Further, the cover 36 for the staying tank 3 holding the recording PH electrode 8 can be detachably installed in the staying tank 3.

First, the discharge pump chamber 4 is installed in the retention tank 3 by detachably attaching the outer surface 4 b of the discharge pump chamber 4 to the outer surface 3 a of the retention tank 3. That is, the periphery of the discharge port 11 on the outer surface 4 b of the discharge pump chamber 4 and the periphery of the discharge port opening 3 b on the outer surface 3 a of the retention tank 3 are fixed by bolts. Further, the attachment piece 4c on the discharge port 11 side of the discharge pump chamber 4 and the flange 24a of the retention tank 3 are fixed by bolts.

Thus, only one outer surface 4 b side of the discharge pump chamber 4 is installed in the retention tank 3. Thereby, attachment and removal of the discharge pump chamber 4 are further facilitated.

Further, as shown in FIG. 10, the outer side surface 4 a facing the outer side surface 4 b of the discharge pump chamber 4 is disposed at the boundary between the retention tank 3 and the discharge tank 4, so that the second partition plate 20 is externally attached. The side surface 4a is also used. Thereby, the number of parts is reduced and the total cost is reduced.

Further, the cover 36 for the retention tank 3 is fixed to both the mounting piece d on the outer side surface 4a side of the discharge pump chamber 4 and the flange 24a on the back side with bolts. The attachment / detachment structure of the neutralization mechanism 23 will be described later.

Next, a structure related to space saving of the PH processing apparatus 1 according to the present invention will be described. FIG. 11 is a perspective view in which the PH processing apparatus 1 is vertically stacked. As shown in FIG. 11, guide portions 34 a and 34 b are formed on both sides of the upper end of the PH processing apparatus 1. That is, the guide portions 34a and 34b are provided with holes 34c, which are formed on the near side and the far side of the upper end side portions, respectively.

Leg portions 33 a and 33 b that can be engaged with the guide portions 34 a and 34 b are formed on both sides of the lower end of the PH processing apparatus 1. That is, the leg portions 33a and 33b have a substantially U-shaped cross section, and are formed over the front side and the back side full length of the lower end portion.

Then, a claw portion of the forklift is inserted into the gap between the leg portions 34a and 34b of the PH processing apparatus 1 disposed at the upper side and lifted, and along the guide sections 34a and 34b of the PH processing apparatus disposed at the lower side. By sliding the legs 33a and 33b of the PH processing device 1 disposed above and engaging the guide portions 34a and 34b of the PH processing device disposed below, the plurality of PH processing devices 1 are prevented from shifting. Can be stacked vertically.

Thereby, when storing PH processing apparatus 1, it can store vertically. If it does so, the space saving at the time of storage can be aimed at, and reduction of a total cost can be aimed at. In addition, the PH processing apparatus 1 arrange | positioned upwards can also be stacked vertically so that the several PH processing apparatus 1 may not shift | deviate by lifting with a crane vehicle using the hole 34c of guide part 34a, 34b.

Next, the carbon dioxide reaction tank 2 used in the PH treatment apparatus 1 according to the present invention will be described. FIG. 7 is a schematic explanatory diagram (1) of the carbon dioxide reaction tank 2 according to the present invention, and FIG. 8 is a schematic explanatory diagram (2) of the carbon dioxide reaction tank 2 according to the present invention. FIG. 8 is an enlarged view of the upper part of FIG. That is, the carbon dioxide reaction tank 2 neutralizes the alkaline component of the raw water A by dissolving the carbon dioxide C in the raw water A, and reduces the PH value to a set value (PH 5.8 to 8.6). It is.

7 and 8, 24 is an outer tub, 25 is a cover plate, 26 is an inner cylinder, 26a is a gutter plate of the inner cylinder 26, 27 is a raw water supply pipe, 28 is a carbon dioxide supply pipe, and 29 is a treated water discharge section. , 31 is a tapered tapered channel, and 32 is a nozzle member. In FIG. 8, solid arrows indicate the flow of carbon dioxide C, and broken arrows indicate the flow of raw water A.

That is, the carbon dioxide gas reaction tank 2 has an outer tank 24 having a treated water discharge part 29 on the upper end side, and an inner cylinder 26 that is disposed inside the outer tank 24 and has a gutter 26a that extends around the entire upper end. A raw water supply pipe 27 which is disposed above the outer position of the inner cylinder 26 and is detachably attached to the gutter plate 26a, a carbon dioxide gas supply pipe 28 inserted into the raw water supply pipe 27, and a raw water supply A nozzle member 32 sandwiched between the tube 27 and the flange plate 26a of the inner cylinder 26 is provided.

The alkaline raw water A ejected from the nozzle member 32 through the raw water supply pipe 27 and the carbon dioxide gas C ejected from the carbon dioxide supply pipe 28 are mixed in the inner cylinder 26.

Here, the nozzle member 32 has a short cylindrical shape having a flange portion 32a all around the lower end, and is arranged in a concentric manner with the inner cylinder 26 and the raw water supply pipe 27, and is tapered toward the inner cylinder. While forming the flow path 31, the flange 32 a is sandwiched between the raw water supply pipe 27 and the flange 26 a of the inner cylinder 26.

Therefore, the nozzle member 32 can exhibit a function as a sealing material for improving the airtightness between the raw water supply pipe 27 and the inner cylinder 26. Moreover, since attachment and detachment can be performed by attaching / detaching the raw water supply pipe 27 from the gutter plate 26a, the nozzle member 32 can be easily replaced as one component.

The nozzle member 32 can be made of an elastic material such as rubber, thermoplastic resin, or thermosetting resin, but is not limited thereto. When an elastic material is used, it can be an inexpensive replacement material and can improve the function as a sealing material.

The outer tank 24 is a rectangular parallelepiped having a width of about 250 to 300 mm and a length of about 700 to 900 mm, and constitutes an outline of the carbon dioxide reaction tank 2. As shown in FIGS. 8 and 10, the cover plate 25 is connected to the flange plate 26 a of the inner cylinder 26 and is detachable from the outer tub 24. That is, the raw water supply pipe 27, the carbon dioxide gas supply pipe 28, the nozzle member 32, and the inner cylinder 26 are integrally connected to the cover plate 25 to constitute the neutralization mechanism section 23 as a whole. The outer tub 24 is detachable.

Accordingly, the flange portion 25a of the cover plate 25 and the upper end portion of the outer tub 24, that is, the flange 24a welded to the upper end portion of the carbon dioxide reaction tank 2, are fixed with bolts, so that the upper opening of the outer tub 24 is hermetically sealed. Has been. Further, a treated water discharge portion 29 for discharging treated water is provided at the upper end side portion of the outer tub 24, and a gate valve 35 is provided at the lower end portion of the outer tub 24.

With the above configuration, the neutralization mechanism section 23 can be easily installed in the carbon dioxide reaction tank 2, and only the neutralization mechanism section 23 can be removed for maintenance. In other words, energy saving is achieved and the total cost is reduced.

The inner cylinder 26 is a cylindrical body having an inner diameter of 65 to 100 mmΦ and a length of about 600 to 800 mm, and an upper end portion thereof is connected to the cover plate 25 to constitute a part of the neutralization mechanism portion 23. And the inner cylinder 26 installs the neutralization mechanism part 23 in the outer tank 24 so that it may be inserted into the outer tank 24 concentrically and fixed. Moreover, the lower end part 26b of the inner cylinder 26 is expanded in diameter to about 200 mmΦ to form a trumpet shape.

The raw water supply pipe 27 has a substantially elbow cylindrical shape, has a raw water inlet 10 at a side, encloses a carbon dioxide gas supply pipe 28 inserted from above, and a lower portion facing the inner cylinder 26. Open. Then, the lower end portion of the raw water supply pipe 27 and the nozzle member 32 installed without gaps at the lower portion of the raw water supply pipe 27 face the inner cylinder 26 and are attached to the upper surface of the gutter plate 26a. It is detachably attached via the tool 30. The raw water A is ejected from the nozzle member 32 to the inner cylinder 26. Note that the shape of the raw water supply pipe 27 is not limited to a substantially elbow-shaped cylinder.

Further, the carbon dioxide gas supply pipe 28 is inserted into the raw water supply pipe 27 from above the raw water supply pipe 27, the tip portion extends into the tapered tapered flow path 31 of the nozzle member 32, and an inner cylinder 24 and the shaft core are aligned and fixed to the upper part of the raw water supply pipe 27. The carbon dioxide C is jetted from the tip of the carbon dioxide supply pipe 28 to the inner cylinder 26.

Note that the raw water A having a pressure of 0.5 to 1.5 kg / cm 2 and a flow rate of 50 to 100 L / min is supplied to the raw water supply pipe 27. Then, the raw water A is jetted from the nozzle member 32 into the inner cylinder 26 in the shape of a truncated cone while the flow of the raw water A is directed in a substantially right-angle direction within the substantially elbow-shaped cylindrical raw water supply pipe 27.

A small circle is formed from the tip of the carbon dioxide gas supply pipe 28 at a flow rate of carbon dioxide gas C of 2 to 3 kg / cm 2 from the carbon dioxide gas supply pipe 28 at a flow rate of 5 to 25 L / min (when the pH value of the raw water is 11). It is ejected into the inner cylinder 26 in a columnar shape.

Here, since the raw water supply pipe 27 is located in the axial center part of the nozzle member 32, the small columnar carbon dioxide gas C is ejected from the top of the truncated cone-shaped raw water A ejected from the tapered tapered channel 31. It will be. Then, the ejected carbon dioxide C always adheres to and dissolves in the raw water A simultaneously with the ejection.

Furthermore, when the raw water A is continuously ejected in a truncated cone shape, the mixed water of the raw water A and the carbon dioxide gas C collides with each other and becomes finer, and the surface area of the liquid increases. As a result, the solubility of carbon dioxide C is improved and the amount of carbon dioxide C required for neutralizing raw water A is reduced.

Moreover, since the raw water A ejected from the nozzle member 32 and the carbon dioxide C ejected from the tip of the carbon dioxide supply pipe 28 are not mixed in the raw water supply pipe 27 but are mixed in the inner cylinder 26, the raw water Calcium carbonate generated when A and carbon dioxide C react with each other hardly adheres to the raw water supply pipe 27, the carbon dioxide supply pipe 28, and the nozzle member 32.

Further, the mixed water of the raw water A and the carbon dioxide C is stirred and mixed in the inner cylinder 26 that is a carbon dioxide gas chamber, whereby the carbon dioxide C is dissolved in the raw water A. Thereby, it reacts with the carbon dioxide gas C in which the alkaline component in the raw water A is dissolved and is neutralized, and its PH value is lowered.

In addition, since the water pressure corresponding to the liquid level of the outer tub 24 is applied in the inner cylinder 26, the carbon dioxide bubbles are discharged to the outside by containing the carbon dioxide bubbles in the inner cylinder 26. As the amount decreases, it is compressed by water pressure, and its solubility is improved.

Next, the characteristic test result of the carbon dioxide reaction tank 2 related to the PH treatment apparatus 1 according to the present invention will be described. A small model of the reaction tank 2 of the ejector system shown in FIG. 12 and the carbon dioxide reaction tank 2 in the system of the present invention of FIG. 7 is created, the flow rate of the raw water A to be supplied is constant, and the PH value of the raw water A is changed from The amount of carbon dioxide used up to 7, the gas charge to consume, and the trend of PH value were investigated.

Table 2 shows the amount of carbon dioxide used until the PH value of raw water A is changed from 11 to 7 and the gas charge to be consumed when the raw water treatment amount is 3 m3 / h in the present invention method and the ejector method of FIG. FIG. 9 is a diagram showing the trend of the PH value in the inventive method and the ejector method of FIG. The numerical value on the vertical axis in FIG. 9 is the PH value, and the numerical value on the horizontal axis is time (minutes).

The broken line near PH11 (H in FIG. 9) is the raw water A, and the broken line near PH7 (J in FIG. 9) is the detected PH value of the control PH electrode 7 when processed according to the method of the present invention shown in FIG. A solid line (K in FIG. 9) having a small vertical fluctuation near PH7 is a PH detection value of the recording PH electrode 8 when processed in the method of the present invention shown in FIG. 7, and a solid line having a large vertical fluctuation near PH7. (I in FIG. 9) is a PH detection value when processing is performed in the ejector method.

As is apparent from the results in Table 2, it can be seen that in the present invention system of FIG. 7, the total amount of carbon dioxide used is clearly lower than the ejector system, and therefore the gas charge to be consumed is lower. .

Also, as shown in FIG. 9, it can be seen that the PH value of the present invention system of FIG. 7 is clearly more stable than the ejector system. That is, K and J in FIG. 9 indicate the present invention system of FIG. 7, but there is less fluctuation in the vertical direction compared to I in FIG. 9 showing the ejector system, and the PH value is clearly stable. doing.

Comparing K and J in FIG. 9, it can be seen that K is more stable in PH value than J. Here, referring to FIG. 5, J indicates the PH value inside the carbon dioxide reaction tank 2, and K indicates the PH value inside the staying tank 3. It can be seen that the PH value becomes more stable by passing the.

From the above, in the system of the present invention shown in FIG. 7, the total amount of carbon dioxide used is obviously smaller than that of the ejector system, so that the gas charge to be consumed is low. That is, the method of the present invention shown in FIG. 7 improves the utilization efficiency of carbon dioxide, and can greatly reduce the consumption of carbon dioxide.

As described above, the carbon dioxide gas C can be used without waste by the carbon dioxide reaction tank 2 used in the PH treatment apparatus 1 according to the present invention, and the dissolution efficiency can be increased. Further, since the raw water A and the carbon dioxide C are not mixed in the raw water supply pipe 27 but are mixed in the inner cylinder 26, the calcium carbonate generated when the raw water A and the carbon dioxide C react reacts with the raw water supply pipe. 27, the carbon dioxide supply pipe 28, and the nozzle member 32 are less likely to adhere.

By the way, when calcium carbonate generated when raw water A reacts with carbon dioxide C adheres to the inside of the carbon dioxide reaction tank 2, it is necessary to go to the construction site for business trip repair. 1 reduces the frequency of business trip repairs.

Furthermore, when the PH processing apparatus 1 according to the present invention constructs the PH processing apparatus 1, it is intended to save energy and space by reducing the number of members brought into the construction site and reducing the number of steps required for the construction. Combined with being able to do so, the total cost can be reduced.

In the PH treatment apparatus 1 according to the present invention, carbon dioxide is used as a neutralizing agent, but it is needless to say that oxygen gas or ozone gas may be used instead of carbon dioxide. An oxygen gas reaction tank for a PH processing apparatus and an ozone gas reaction tank for a PH processing apparatus can also be used.

The present invention can be used for PH treatment of alkaline waste liquid not only in cement wastewater and boiler wastewater PH treatment equipment but also in all industries. It is also possible to use oxygen gas or ozone gas as a neutralizing agent instead of carbon dioxide gas.

A Raw water (waste liquid)
B treated raw water (treated wastewater)
C Carbon dioxide gas 1 PH treatment device 2 Carbon dioxide reaction tank 3 Retention tank 3a Outer surface 3b of the retention tank Opening for discharge port 4 Discharge pump chamber 4 'Discharge tank 4a Outer side surface 4b Outer side surface 4c Mounting piece 4d Mounting piece 5 Control panel 5a Control circuit 5b PH indicator 5c PH recorder 6 Carbon dioxide supply device 7 Control PH electrode 8 Recording PH electrode 9 Raw water automatic pump 10 Raw water inlet 11 Outlet 12 Current detector 13 Raw water pump outlet 14 For outlet pump Outlet 15 Pressure regulator 16 Solenoid valve 17 Automatic discharge pump 18 Raw water tank 19 First partition plate 20 Second partition plate 21 Perimeter plate 22 Carbon dioxide gas cylinder 23 Neutralization mechanism section 24 Outer tank 24a Flange 25 Lid 25a Flange section 26 Inside Cylinder 26a Inner cylinder gutter 26b Inner cylinder lower end 27 Raw water supply pipe 28 Carbon dioxide supply pipe 29 Treated water discharge part 30 Fixing tool 31 Tapered tape Joryuro 32 nozzle member 32a flange portion 33a legs 33b leg 34a guide part 34b guide part 34c hole portion 35 a gate valve 36 covers

Claims (11)

An outer tub having a treated water discharge part on the upper end side, an inner cylinder disposed inside the outer tub and having a girdle covering the entire circumference of the upper end, and arranged in communication with the inner cylinder and the inner A raw water supply pipe that is detachably attached to a wall plate of the cylinder, communicates with the inner cylinder and the raw water supply pipe, is sandwiched between the raw water supply pipe and the wall plate of the inner cylinder, and is attached to the inner cylinder A carbon dioxide reaction tank comprising a nozzle member that forms a tapered taper flow path toward the head, and a carbon dioxide gas supply pipe that is inserted into the raw water supply pipe and has a tip extending into the tapered taper flow path of the nozzle member. A PH treatment apparatus comprising the carbon dioxide reaction tank in which alkaline raw water ejected from the nozzle member and carbon dioxide ejected from the tip of the carbon dioxide supply pipe are mixed in the inner cylinder. The said nozzle member is a short cylinder shape which has a collar part over a perimeter of a lower end part, The said collar part is clamped by the said raw | natural water supply pipe and the collar plate of the said inner cylinder. PH processing equipment. The PH processing apparatus according to claim 1, wherein the nozzle member is made of an elastic material. A raw water automatic pump, a raw water pump outlet to which the raw water automatic pump is connected, a discharge automatic pump and a discharge pump outlet to which the automatic discharge pump is connected, and a control panel for controlling the amount of carbon dioxide supplied The PH processing apparatus according to claim 1, wherein the raw water pump outlet and the discharge pump outlet are disposed inside the control panel. A carbon dioxide gas is supplied to the carbon dioxide gas reaction tank by arranging a current detector inside the control panel and detecting the current when the raw water automatic pump is operated by the current detector. The PH processing apparatus according to claim 4. A retention tank is connected to the side of the carbon dioxide reaction tank, a discharge tank is connected to the side of the retention tank, and an opening is formed at the upper end of the boundary surface between the carbon dioxide reaction tank and the retention tank. A first partition plate is erected, a second partition plate having an opening at the upper end is erected on the boundary surface between the retention tank and the discharge tank, the carbon dioxide reaction tank, the opening of the first partition plate, and the retention The PH treatment apparatus according to any one of claims 1 to 3, wherein the treated water is moved in the order of the tank, the opening of the second partition plate, and the discharge tank. The carbon dioxide reaction tank, the retention tank, and the discharge tank have a substantially rectangular parallelepiped shape, and a side portion in the short direction of the retention tank and a short side of the discharge tank are disposed on the side in the longitudinal direction of the carbon dioxide reaction tank. The PH processing apparatus according to claim 6, wherein side portions in a direction are continuously provided, and the carbon dioxide reaction tank, the retention tank, and the discharge tank form a substantially rectangular parallelepiped shape as a whole. The retention tank is provided with the substantially rectangular parallelepiped discharge tank, and the outer surface of the discharge tank forming a boundary surface between the retention tank and the discharge tank is the second partition plate. The PH processing apparatus according to claim 6 or 7. The PH treatment according to claim 8, wherein the discharge tank is installed in the stay tank by detachably attaching one outer surface of the discharge tank to the outer surface of the stay tank. apparatus. The PH treatment apparatus according to any one of claims 6 to 9, further comprising a detachable cover plate on the outer tank of the carbon dioxide reaction tank, wherein the cover plate is connected to the bottom plate. . Guide portions are formed on both sides of the upper end of the PH processing device, legs that can be engaged with the guide portions are formed on both sides of the lower end of the PH processing device, and the guide portion and the upper portion of the PH processing device disposed below. The PH processing apparatus according to claim 1, wherein a plurality of PH processing apparatuses can be stacked vertically by engaging legs of the PH processing apparatus disposed on the base.