JPH0673663B2 - Water treatment equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a water treatment apparatus for purifying wastewater containing volatile substances including organic halogen compounds.

2. Description of the Related Art Conventionally, as a wastewater treatment apparatus of this type, as shown in FIG. 7, an air supply port 102 is provided inside a casing 101 having an air supply port 102 at a lower part and an exhaust port 103 at an upper part. It is known that partition parts (filler parts) 105 and 106 are provided to allow gas supplied from the chamber and drainage water from the water supply port 107 to efficiently contact with each other in a gas-liquid manner.

108 is a dispersion pipe provided between both partition parts 105.106, 110 is a water supply port 1
This is a water sprinkling pipe having 07, and a water supply line 112 having a pump 111 at the opening end projecting outside the casing 101 of this water sprinkling pipe 110.
Are connected. 113 is a blower.

In the above, the drainage supplied from the water supply port 107 of the sprinkling pipe 110 to the inside of the casing 101 by the pump 111 is first dropped to the surface of the partition 105 and propagated through the surface to increase the surface area. , Through the partition 105. Then, after being received by the dispersion pipe 108, it drops from here to the partition 106 and propagates along the surface, passes through the partition 106 in the same manner as described above, and drops to the bottom of the casing 101,
During this time, the air blower 113 makes gas-liquid contact with the air from below the partition 106 sent into the casing 101, and aeration is performed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the case of the device as described above, the contact between the wastewater and the air is lengthened to improve the aeration treatment efficiency, and the wastewater is separated into the partition parts 105, 10.
In order to prevent the short pass phenomenon of dropping along the wall of 6, the plurality of partition parts 105 and 106 and the dispersion pipe 108 as described above.
Therefore, the casing 101 having a large volume is required.
However, there is a problem that the device becomes large in size.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a water treatment device capable of reducing the volume of the casing by a simple facility and downsizing the device.

Means for Solving the Problems In order to achieve the above object, the present invention has an air supply port in a lower portion, and inside a casing in which an exhaust port is provided in an upper portion, a gas supplied from the air supply port is an inclined flow. A device in which one partition having a large number of slits to be passed therethrough is provided, and a water supply port is provided in a casing above the partition,
The slit has a circular shape that is concentrically formed in the partition, and the casing below the partition with the circular slit has a closed structure, and gas is supplied into the lower casing. A gas supply member for pressurizing and passing the gas as an inclined flow from the slit against the water supplied from the water supply port into the casing above the partition part, and connecting the gas supply port to the partition part. A vertically extending shield plate that penetrates the central portion of the casing from below and projects to a predetermined height in a vertical direction from the outside to the inside of the casing, and causes the water supplied from the water supply port to make one round and stop. To
A drainage port is provided between the drain pipe and the peripheral wall of the casing from the upper part of the partition part to the upper part of the drain pipe, and a drain port for introducing the water dammed by the shielding plate into the drain pipe is provided in the casing above the partition part. It is characterized in that it is provided on the peripheral wall of the drain pipe on the side opposite to the inflow side of the shielding plate below the liquid surface of the drainage.

Instead of the circular slit, the slit may be linear, and the water supply port may be provided on one side of the partition part and the drain port may be provided on the other side.

Further, in any of the above cases, it is preferable to connect a water supply pipe equipped with a pump to the water supply port, and to provide a heating means for heating the water to be sent between the pump and the water supply port of the water supply line.

Action The water supplied from the water supply port into the casing goes around the partition part along its slit almost once and then is blocked by the shielding plate. During this time, the water is supplied from the air supply port into the casing below the partition part. The gas is supplied and pressurized, passes through a large number of slits in the partition section as an inclined flow, and is vigorously brought into gas-liquid contact with the gas blown up into the casing above the partition section for aeration treatment. Then, the water treated in this way is drained to the outside of the casing from the drain port of the drain pipe.

When the slit is linear, the aeration process is similarly performed while passing through the slit from the water supply port to the drainage port.

If there is a heating means, it can be supplied after heating the water.

Embodiment 1 In FIGS. 1 and 2, reference numeral 1 is a cylindrical casing having an air supply port 2 in the lower part and an exhaust port 3 in the upper part. Air supply port 2
A slit plate (partition portion) 5 is provided inside the casing 1 slightly above, and a water supply port 6 is provided in the casing 1 above the slit plate.

Reference numeral 7 denotes a drain pipe, which is the bottom wall of the casing 1 and the slit plate 5.
It is installed through the central part of the. The upper end of the drainage pipe 7 is closed and protrudes from the slit plate 5 by a predetermined height.
A drain port 8 for draining the treated water is formed on the peripheral wall slightly below the upper end. The formation position of the drainage port 8 in the circumferential direction of the drainage pipe 7 is provided, for example, between the drainage pipe 7 and the peripheral wall of the casing 1 in order to dam the drainage supplied from the water supply port 6 after making one round. It is close to the shield plate 10.

As shown in FIGS. 3 and 4, a large number of slits 12 through which air (gas) supplied from the air supply port 2 passes are formed in the slit plate 5 in a circular shape concentric with the drainage space 7. The slit 12 is inclined from the center of the slit plate 5 toward the outer peripheral side by a predetermined angle θ (for example, 30 to 45 °) with respect to the upper surface of the slit plate 5.

The width l of the slit 12 is, for example, about 0.1 mm <l <3 mm. Further, the inside of the casing 1 below the slit plate 5 has a closed structure, and the casing 1 having this closed structure is
The internal pressure is usually 200 to 1000 m by the blower 21 which is connected to the air supply port 2 and supplies air into the casing 1 to pressurize it.
It is kept around mAq. And at this time the slit 12
The initial velocity of the air blown into the casing 1 above the slit plate 5 reaches 30 m / sec or more. Therefore, the drainage supplied into the casing 1 above the slit plate 5 does not fall from the slit 12 and enter the casing 1 below.

In FIG. 1, a water feed line 18 having a pump 15, a heat exchanger 16 and a heater 17 is connected to the water supply port 6 of the casing 1, and another water feed line is provided between the heat exchanger 16 and the drain pipe 7. The water line 20 is connected.

The operation of the above embodiment will be described below.

The waste water sent by the pump 15 via the water supply pipe 18 is warmed by the heat exchanger 16 and raised to a predetermined temperature by the heater 17.

After that, from the water supply port 6 to the slit plate 5 in the casing 1.
The wastewater that has entered the upper part is supplied from the air supply port 2 into the casing 1 below the slit plate 5 by the blower 21 and is pressurized, and becomes a slant flow from the slit 12 and violently contacts the air blown up. Then, in the contact state, aeration treatment is performed during almost one round along the slit 12 as shown by the black dot arrow in FIGS. The treated water enters the drain pipe 7 through the drain port 8,
It is discharged to the outside of the casing 1.

Then, the discharged warm treated water is sent to the heat exchanger 16 through the water supply pipe 20, where it exchanges heat with the waste water sent from the pump 15 and returns to room temperature. On the other hand, the waste water from the pump that exchanges heat with the treated water is preheated before being heated by the heater 17.

In this way, the removal efficiency of the volatile substances in the water can be improved by raising the water temperature of the waste water in the heat exchanger 16 in advance, and the removal efficiency can be stabilized by setting the heater 17 to a predetermined temperature. For example trichlorethylene 800ppm
The result of the experiment shows that the treated water of 0.3ppm or less can be obtained by treating the effluent containing water, and the treated water amount can be doubled by treating the effluent with the water temperature of 10 ℃ up to 30 ℃. all right.

FIGS. 5 and 6 show another embodiment. In this embodiment, instead of the slit 12 and the drainage pipe 7 of the above-mentioned embodiment, a slit plate 52 provided inside a square tubular casing 51 has a large number of linear shapes. Of slits 53 between its juxtaposed plates 52
Is formed, the water supply port 55 on one side of the casing 51 orthogonal to the slit 53 of the slit plate 52,
This is different from the above embodiment in that a treated water drainage port 56 is provided on the other side.

In the case of this embodiment, the drainage that has entered the casing 51 from the water supply port 55 passes through the slit 53 on the slit plate 52 and the drainage port.
During the process up to 56, the aeration process is performed by violently contacting the air blown up from the slit 53 as in the above-described embodiment.

Although only the treatment of waste water has been described above, the present invention can be applied not only to waste water, but also to other water treatment such as removal of a trace amount of TOC in ultrapure water.

EFFECTS OF THE INVENTION In the case of claims 1 and 2, since the water that enters the casing from the water supply port is sent along the upper part of the partition part, the aeration process is performed by violently contacting the gas blown from below the slit of the partition part. Unlike conventional devices, it is not necessary to provide a plurality of partition parts or dispersion pipes, and therefore, it is not necessary to increase the volume of the casing, and it is possible to make it compact and to continuously perform aeration. It is possible to improve the efficiency and efficiency of water treatment.

In the case of claim 3, since the water supplied into the casing from the water supply port can be heated by the heating means, in addition to the above effect, the removal of volatile substances from the water is more effective, It can be stable.

[Brief description of drawings]

FIG. 1 is an overall schematic front view showing an embodiment of the present invention,
2 is a schematic plan view of the same as above, FIG. 3 is a plan view showing a mounting state of a slit plate and a drain pipe, FIG. 4 is a plan view showing a mounting state of a slit plate, a drain pipe and a casing, and FIG. FIG. 6 is a plan view of a slit plate of the same, and FIG. 7 is an overall schematic front view showing a typical example of the related art. 1 ... Casing, 2 ... Air supply port, 3 ... Exhaust port 5 ... Slit plate, 6 ... Water supply port, 7 ... Drain pipe 8 ... Drain port, 10 ... Shielding plate, 12 ... Slit 15 ... Pump, 16 ... Heat exchanger , 17 ... Heater 18, 20 ... Water supply pipe line, 21 ... Blower 51 ... Casing, 52 ... Slit plate 53 ... Slit, 55 ... Water supply port, 56 ... Drainage port

Claims (3)

[Claims] 1. A partition having a plurality of slits through which a gas supplied from the air supply port passes in an inclined flow in a casing having an air supply port at a lower portion and an exhaust port at an upper portion. A device having a portion and a water supply port provided in a casing above the partition portion, wherein the slit is formed in a circular shape concentrically in the partition portion, and there is the circular slit. The casing below the partition has a closed structure, and gas is supplied into the casing below the pressurization to slit the gas into the casing above the partition against the water supplied from the water supply port. A gas supply member that is passed as an inclined flow from the casing is connected to the air supply port, and a drain pipe that penetrates the central portion of the partition portion from below and projects a predetermined height is provided vertically from the outside of the casing toward the inside. , The water supply port A vertically oriented shielding plate that stops the water supplied from the
A drainage port is provided between the drain pipe and the peripheral wall of the casing from the upper part of the partition part to the upper part of the drain pipe, and a drain port for introducing the water dammed by the shielding plate into the drain pipe is provided in the casing above the partition part. The water treatment device is provided on the peripheral wall of the drain pipe on the side opposite to the inflow side of the shielding plate below the liquid surface of the drainage. 2. A partition having a plurality of slits, through which a gas supplied from the air supply port passes in an inclined flow, inside a casing having an air supply port in the lower part and an exhaust port in the upper part. A device provided with a water supply port in a casing above the partition part, wherein the slit comprises a straight line formed in parallel with the partition part, and the straight line slit is provided. The casing below the partition has a closed structure, and gas is supplied into the casing below the pressurization to slit the gas into the casing above the partition against the water supplied from the water supply port. A water supply member which is connected to a gas supply port through which the gas flows as an inclined flow, and the water supply port is disposed on one side of the partition section and a drain port is provided on the other side. Processing equipment. 3. The water treatment apparatus according to claim 1 or 2, wherein a water supply pipe equipped with a pump is connected to the water supply port, and the water to be sent is provided between the pump and the water supply port of the water supply pipe line. A water treatment device comprising a heating means for heating.