JP5753245B2 - Wet powder activated carbon supply device and water treatment device provided with the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a powder activated carbon used for water purification, particularly a wet powder activated carbon capable of quantitatively supplying wet wet powder activated carbon to a water treatment apparatus, and a water treatment apparatus including the same.

  In recent years, activated carbon has been used to treat water highly for beverages. As the activated carbon for water treatment, there are dry fine powder dry activated carbon and wet powder activated carbon obtained by moistening dry powder activated carbon with water. Although dry powder activated carbon is easy to supply in a fixed amount using compressed air or the like, there is a problem that it is scattered and deteriorates the working environment, and it is easy to burn, so that sufficient fire prevention measures are required.

  On the other hand, wet powder activated carbon is superior to dry powder activated carbon in that it does not have the above-mentioned problems, but has a problem that it is difficult to perform quantitative supply because it has viscosity and poor fluidity. For this reason, the general supply of wet powdered activated carbon is performed by adding a large amount of water and improving fluidity as dispersed water.

  However, the supply of dispersed water as described above requires a large tank for storing the dispersed water, and there is a problem that the burden on facilities increases. For this reason, a small apparatus that can quantitatively supply wet powdered activated carbon is desired.

  Conventionally, as a supply device that can supply wet powdered activated carbon without using dispersed water, a gap of several millimeters is provided between the surfaces in a lower casing connected via an upper casing to the bottom of a hopper equipped with a rake. And a pair of delivery rotors are known (for example, see Patent Document 1). In this wet powder activated carbon supply device, the wet powder activated carbon charged in the hopper is fed into the lower casing through the upper casing while stirring with the rake, and is sequentially sent out from the gap between the rotors as the rotor rotates. Yes.

JP 2005-28295 A

  However, the stirring by the rake in the conventional wet powder activated carbon supply device can increase the fluidity of the wet powder activity in the hopper, but can also increase the fluidity of the wet powder activity in the upper and lower casings. I can't. For this reason, the amount of wet powder activated carbon delivered from the delivery roller per unit time by causing a bridge in the upper casing or slipping between the wet powder activated carbon contained in the lower casing and the delivery roller. There is a problem that tends to fluctuate.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to enable easy supply (quantitative supply) of wet powdered activated carbon at a constant amount per unit time with a small apparatus.

The present invention, for the above purpose, comprises a storage tank having a first stirring means for stirring wet powder activated carbon, and a metering device connected to a discharge port provided at the bottom of the storage tank,
The weighing device is
A cylindrical peripheral plate having one end connected to the periphery of the discharge port;
Covering the opening on the other end side of the peripheral side plate, and a bottom plate having a supply port;
Rotating partition plate having a measuring part formed as a notch or a hole at a position passing through the supply port along with the rotation, while being rotated on the bottom plate,
A cover provided so as to cover a range in which the measuring unit passing over the supply port is connected to the supply port;
A second stirring means for stirring the wet powder activated carbon in a space surrounded by the peripheral side plate,
Each of the first stirring unit and the second stirring unit includes a rotating arm that rotates in a horizontal direction and a stirring pin that protrudes downward from the rotating arm, and the first stirring unit flows wet powdered activated carbon. And the second stirring device fluidizes the wet powder activated carbon to promote the movement to the metering unit, and supplies the wet powder activated carbon. Is to provide.

In the present invention, the cover is connected to an air supply pipe for supplying air to the measuring unit passing over the supply port.
The bottom plate, the peripheral side plate and the cover are made of metal, the rotary partition plate is made of synthetic resin, and the rotary partition plate is replaceable;
The stirring pin is cylindrical ,
It the direction of rotation of the rotating arm of the first stirring means, the rotational direction of the rotary arm of the second stirring means is reversed,
It is preferable that the side wall surface of the measuring part is a downward inclined surface.

  The present invention also provides a water treatment apparatus provided with the wet powder activated carbon supply apparatus according to the present invention.

  According to the present invention, since the wet powder activated carbon is stirred both in the storage tank and in the metering device, the occurrence of bridges can be prevented both in the storage tank and in the metering device. For this reason, the movement of the wet powder activated carbon from the storage tank to the weighing device is reliable, and the movement to the weighing unit in the weighing device is also reliable.

  Moreover, in this invention, the wet powder activated carbon which entered the measurement part provided in the rotation partition plate falls from the supply port provided in the bottom plate, and is supplied to the next stage. The amount of wet activated carbon supplied can be adjusted by the size (volume) of the lightweight part, the number of lightweight parts, the rotational speed of the rotating partition plate, etc., and by adjusting these, the supply of wet activated carbon per unit time The amount can be adjusted. Since the measuring part is formed as a notch or a hole provided in the rotating partition plate, the area can be easily set larger than the thickness, and the light part can be reliably dropped to the supply port. .

  From the above, according to the present invention, even if it is a wet powder activated carbon with low fluidity, it is suppressed that the movement is inhibited or interrupted, so that it remains as it is without adding a large amount of water. It is possible to provide a small apparatus that can supply a fixed amount in a state.

It is a front view which shows an example of the supply apparatus of the wet powder activated carbon which concerns on this invention. It is AA sectional drawing in FIG. It is an enlarged vertical sectional view of the vicinity of the quantitative supply device. It is an enlarged plan view near the fixed amount supply device.

  Hereinafter, the present invention will be further described with reference to the drawings. In the drawings referred to below, the same reference numerals indicate the same components.

  As shown in FIGS. 1 and 2, the wet powder activated carbon supply device according to the present invention includes a wet powder activated carbon storage tank 1 and a weighing device 2 provided at the bottom of the storage tank. The wet powder activated carbon supply device of this example is held on the gantry 3. The wet powdered activated carbon refers to powdered activated carbon to which 20 to 60% by weight of water is added. As the powdered activated carbon used for the water purification treatment, those having a particle size such that the remainder of the sieve when it is passed through a sieve having an opening of 75 μm are 10% by weight or less are generally used. Recently, attempts have been made to enhance the treatment effect by using powdered activated carbon having a finer particle size. The wet powder activated carbon supply device of the present invention can quantitatively supply powdered activated carbon having such a fine particle diameter.

  The storage tank 1 has an openable / closable inlet 4 for introducing wet powdered activated carbon into the upper part. Moreover, in the storage tank 1, the 1st stirring means 5 which stirs the input wet powder activated carbon is provided.

  The first stirring means 5 includes a rotating arm 5a that rotates in the horizontal direction and a plurality of cylindrical stirring pins 5b that protrude downward from the rotating arm 5a. The first stirring means 5 is rotated in the horizontal direction by a driving device 7a such as a motor through a vertical rotating shaft 6 connected to the central portion of the rotating arm 5a. As the stirring pin 5b, a prism can be used. However, since the resistance during stirring is smaller than that of the prism and the lump of wet powder activated carbon is less likely to be formed, a cylindrical shape is preferable. The drive device 7a is connected to the rotating shaft 6 via the speed reducer 7b. In order to prevent the occurrence of bridging, it is necessary to increase the number of revolutions of the first stirring means 5 in accordance with the amount of wet powdered activated carbon charged into the storage tank 1, but on the other hand, excessive stirring tends to cause lumps. For this reason, the rotation of the first stirring means 5 by the speed reducer 7b can be controlled by an inverter in accordance with the amount of wet powdered activated carbon charged into the storage tank 1.

  The bottom 8 of the storage tank 1 is flat, and the weighing device 2 is connected to a discharge port 9 provided in a part thereof. The agitation pin 5b of the first agitation means 5 is arranged with its tip close to the bottom 8 so that the wet powder activated carbon near the bottom 8 can be fluidized and reliably moved to the weighing device 2. preferable. Specifically, the distance between the tip of the stirring pin 5b and the bottom 8 is preferably about 5 to 10 mm. Moreover, it is preferable that at least one of the plurality of agitation pins 5b is provided at a position that passes over the connecting portion with the weighing device 2 as it rotates.

  As shown in FIGS. 3 and 4, the weighing device 2 includes a cylindrical peripheral plate 10 whose one end (upper end) is connected to the peripheral edge of the storage tank 1 discharge port 9, and the other end (lower end) of the peripheral plate 10. And a bottom plate 11 covering the opening on the side. The bottom plate 11 has a supply port 12, and a supply pipe 13 connected to the supply port 12 is attached to the lower surface of the bottom plate 11.

  A flange portion 14 projects outwardly from the lower end side periphery of the peripheral side plate 10, and a gap adjusting plate 15 is sandwiched between the bottom plate 11 detachably attached to the flange portion 14. The gap adjusting plate 15 is an annular plate member having substantially the same inner diameter as the space surrounded by the peripheral side plate 10 and the outer diameter substantially the same as the flange portion 14 and the bottom plate 11. O-rings 16 and 16 are provided for sealing between the gap and the bottom plate 11, respectively. The gap adjusting plate 15 can be replaced by removing the bottom plate 11 from the flange portion 14.

  Inside the gap adjusting plate 15, there is provided a rotating partition plate 19 that is rotated around a vertical rotating shaft 18 by a driving device 17 a such as a motor while being superimposed on the bottom plate 11. The drive device 17a is connected to the rotary shaft 18 via the speed reducer 17b, and is capable of performing inverter control of the rotation of the rotary partition plate 19 by the speed reducer 17b.

  The rotating partition plate 19 is a disk-shaped plate member having substantially the same thickness as the gap adjusting plate 15 and an outer diameter substantially the same as the inner diameter of the gap adjusting plate 15, and is a supply port for the bottom plate 11 as the driving device 17 a rotates. The measuring part 20 is formed at a position passing through the top 12. The measuring part 20 in this example is a notch part formed in the peripheral part of the clearance adjusting plate 15, and a plurality of measuring parts 20 are formed at equal intervals in the circumferential direction of the rotary partition plate 19. The measuring unit 20 can be provided as a hole as long as it passes over the supply port 12 of the bottom plate 11 as it rotates, and whether it is provided as a notch or a hole depends on the formation position of the supply port 12. Can be selected. Further, a plurality of lightweight portions 20 may be provided at irregular intervals or may be singular. However, in order to easily adjust the supply amount of the wet powder activated carbon, a plurality of lightweight portions 20 are provided at regular intervals as in this example. Is preferred.

  The side wall surface of the weighing unit 20 is preferably a downward inclined surface so that the wet powder activated carbon contained in the weighing unit 20 can easily fall to the supply port 12 without adhering to the side wall surface. The inclination angle is about 50 to 70 degrees with respect to the horizontal plane.

  A cover 21 protrudes from the peripheral side wall 10 above the supply port 12 of the bottom plate 11, and the rotating partition plate 19 rotates in a state where a part is sandwiched between the bottom plate 11 and the cover 21. The cover 21 covers the rotating partition plate 19 in a range where the measuring unit 20 passing over the supply port 12 is connected to the supply port 12. The cover 21 is provided only on a part of the rotational movement region of the weighing unit 20 that moves in accordance with the rotation of the rotary partition plate 19. In other regions, the weighing unit 20 is surrounded by the circumferential side plate 10. It moves in an exposed state in the space. In the wet powder activated carbon supply device according to the present invention, wet powder activated carbon enters each metering section 20 while being stirred by the second stirring means 24 in an area not covered by the cover 21. In particular, since the wet powdered activated carbon is supplied to the weighing unit 20 in a state where the wet powdered activated carbon is fluidized and prevented from being biased by the stirring of the second stirring means 24, an equal amount of wet powder is supplied to each weighing unit 20. Activated carbon can be added. Then, the weighing unit 20 in which the wet powder activated carbon is evenly moved sequentially moves onto the supply port 12, and the wet powder activated carbon in the measurement unit 20 falls from the supply port 12, so that the wet powder activated carbon is transferred to the next stage. A fixed amount can be supplied. The cover 21 isolates the weighing unit 20 from the surroundings, and prevents the wet powdered activated carbon from entering the weighing unit 20 when the wet powdered activated carbon that has entered the weighing unit 20 falls from the supply port 12. Play a role.

  Connected to the cover 21 is an air supply pipe 22 for supplying air into the measuring unit 20 that has moved onto the supply port 12. By supplying air from the air supply pipe 22 into the measuring unit 20, it is possible to promote the fall of the wet powder activated carbon to the supply port 12. The air supply pipe 22 may be configured to intermittently supply air in accordance with the timing at which the measuring unit 20 moves on the supply port 12, but since a large amount of air supply is not necessary, It is preferable to simplify the control mechanism as supplying air. The amount of air supplied from the air supply pipe 22 varies depending on the size of the measuring unit 20 and the like, but is generally about 20 to 50 liters / minute.

  A second agitation unit 24 is provided at the center of the rotary partition plate 19 via a base part 23. The second stirring means 24 includes a rotating arm 24a that rotates in the horizontal direction and a cylindrical stirring pin 24b that protrudes downward from the rotating arm 24a. The second stirring means 24 rotates together with the rotary partition plate 19 via the rotary shaft 18. The second agitating means 24 agitates the wet powdered activated carbon in the region surrounded by the peripheral side plate 10 to promote the movement to the measuring unit 20, and agitates at least a position passing through the rotational movement path overlapping the measuring unit 20. It is preferable to have a pin 24b. The stirring pin 24b is preferably cylindrical in shape for the same reason as the stirring pin 5b of the first stirring means 5. Further, the second stirring means 24 of the present example rotates at the same speed in the same direction as the rotary partition plate 19, but it rotates in the opposite direction to the rotary partition plate 19 or the rotary partition plate 19. It can also be rotated at a different speed. Furthermore, it is preferable that the rotation directions of the first stirring means 5 and the second stirring means 24 are opposite to each other so that a good sales expansion effect can be obtained.

  The peripheral side plate 10, the bottom plate 12, the gap adjusting plate 15, the cover 21, etc. constituting the measuring device 2 are usually made of metal. As the metal to be used, stainless steel is preferable from the viewpoint of durability and the like. In particular, in order to prevent wear of the bottom plate 12 due to friction with the rotating partition plate 19, the rotating partition plate 19 is preferably made of synthetic resin. For example, a plurality of types of rotating partition plates 19 having different thicknesses, the sizes of the measuring units 20, the number of measuring units 20, and the like are prepared, and the supply amount of the wet powder activated carbon is adjusted by appropriately replacing them. be able to. By preparing the gap adjusting plate 15 corresponding to the thickness of the rotating partition plate 19, it is possible to cope with replacement with the rotating partition plate 19 having a different thickness.

  Next, the operating state of the wet powder activated carbon supply device according to the present invention will be described.

  First, wet powdered activated carbon was introduced into the storage tank 1 from the inlet 4, and the first stirring means 5 was rotated by the driving device 7a through the speed reducer 7b at a rotation speed corresponding to the amount of input. Fluidize the wet powdered activated carbon. Further, the driving device 17a is operated to rotate the rotary partition plate 19 and the second stirring means 24 via the speed reducer 17b. The wet powder activated carbon fluidized in the storage tank 1 by the stirring by the first stirring means 5 enters the area surrounded by the peripheral side plate 10 of the measuring device 2, where it is fluidized by the stirring by the second stirring means, Move to 20 and enter. The inflow of the wet powder activated carbon into each metering section 20 is performed in a fluidized state by the stirring of the second stirring means 24, so that an equal amount of wet powder activated carbon can be put into each metering section 20. Then, when the measuring unit 20 in which an equal amount of wet powder activated carbon has entered the supply port 12 of the bottom plate 11 sequentially moves, the wet powder activated carbon in the measurement unit 20 falls to the supply port 12 and the supply pipe 13 is supplied. At this time, when air is supplied to the measuring unit 20 that has moved onto the supply port 12 via the air supply pipe 22, the wet powder activated carbon is more smoothly dropped onto the supply port 12 by being pushed by the air. Can do. As the rotating partition plate 19 rotates, the wet powdered activated carbon is sequentially supplied from the measuring unit 20 to the supply port 12 so that the size and number of the measuring unit 20 and the rotational speed of the rotating partition plate 19 are rotated. The amount of wet powder activated carbon can be quantitatively supplied in accordance with the above.

  The wet powder activated carbon supply apparatus according to the present invention described above is provided in a water treatment apparatus or the like equipped with a septic tank that purifies water by, for example, stirring water to which powdered activated carbon is added and bringing it into contact with powdered activated carbon. By making it possible to add the necessary amount of wet powdered activated carbon to the septic tank, the incidental equipment can be made into a water treatment device that is inexpensive and downsized.

DESCRIPTION OF SYMBOLS 1 Storage tank 2 Weighing device 3 Base 4 Input port 5 First stirring means 5a Rotating arm 5b Stirring pin 6 Rotating shaft 7a Driving device 7b Reducer 8 Bottom portion 9 Discharge port 10 Circumferential side plate 11 Bottom plate 12 Supply port 13 Supply pipe 14 Flange portion DESCRIPTION OF SYMBOLS 15 Clearance adjustment plate 16 O-ring 17a Drive device 17b Reduction gear 18 Rotating shaft 19 Rotating partition plate 20 Measuring part 21 Cover 22 Air supply pipe 23 Base part 24 Second stirring means 24a Rotating arm 24b Stirring pin

Claims (7)

A storage tank having a first stirring means for stirring the wet powder activated carbon, and a weighing device connected to a discharge port provided at the bottom of the storage tank,
The weighing device is
A cylindrical peripheral plate having one end connected to the periphery of the discharge port;
Covering the opening on the other end side of the peripheral side plate, and a bottom plate having a supply port;
Rotating partition plate having a measuring part formed as a notch or a hole at a position passing through the supply port along with the rotation, while being rotated on the bottom plate,
A cover provided so as to cover a range in which the measuring unit passing over the supply port is connected to the supply port;
A second stirring means for stirring the wet powder activated carbon in a space surrounded by the peripheral side plate,
Each of the first stirring means and the second stirring means includes a rotating arm that rotates horizontally, and a stirring pin that protrudes downward from the rotating arm, and the first stirring means flows wet powdered activated carbon. And the second stirring device fluidizes the wet powder activated carbon to promote the movement to the metering unit, and supplies the wet powder activated carbon. .   2. The wet powder activated carbon supply device according to claim 1, wherein an air supply pipe for supplying air to the metering unit that passes over the supply port is connected to the cover.   The wetting according to claim 1 or 2, wherein the bottom plate, the peripheral side plate, and the cover are made of metal, the rotating partition plate is made of synthetic resin, and the rotating partition plate is replaceable. Powdered activated carbon supply device. The apparatus for supplying wet powder activated carbon according to any one of claims 1 to 3, wherein the stirring pin has a cylindrical shape . The rotation direction of the rotary arm of the first stirring means, the wet powdered activated carbon according to any one of claims 1 to 4 the rotational direction of the rotary arm of the second stirring means is characterized in that it is a reverse Feeding device.   The apparatus for supplying wet powder activated carbon according to any one of claims 1 to 5, wherein a side wall surface of the measuring unit is a downward inclined surface.   A water treatment apparatus comprising the wet powder activated carbon supply device according to any one of claims 1 to 6.

Images