JP2003095436A - Activated carbon powder injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost, space-saving activated carbon powder injection device having good controllability. SOLUTION: A vibrating feeder is built into an activated carbon powder storage tank whose body is a rectangular closed container, whereby activated carbon powder is supplied to a metering feeder while pneumatic transportation using suction is used as a movement means, so as to achieve a planar arrangement. Further, pneumatic transportation is carried out also for transfer from the metering feeder to the point of injection of the activated carbon, thereby excluding moisture-absorbing parts and greatly reducing the number of additional devices.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder activated carbon injection device used for storing, supplying and injecting powder activated carbon.

[0002]

2. Description of the Related Art A conventional powder activated carbon injection device used for injecting powdered activated carbon employs a closed conical silo for a powdered activated carbon storage tank, which is fed by gravity to a measuring device installed under storage, and further into a melting tank. The method of cutting out and injecting it as a slurry liquid with an injection pump or the like was mainly.

[0003]

In the conventional powdered activated carbon injecting apparatus, the apparatus is arranged so that the activated carbon is transferred from the powdered activated carbon storage tank to the metering device, the melting tank or the like on the assumption that the activated carbon is dropped by gravity. Therefore, it is necessary to increase the installation height of the entire device. Therefore, to install powdered activated carbon equipment, it is necessary to install it outdoors or construct a building with a high ceiling.

In a powder activated carbon storage tank, the lower hopper has a structure in which the angle of the lower hopper is sufficiently large in order to prevent the trouble of being unable to discharge due to the compaction / crosslinking phenomenon of the powder activated carbon, and the powder activated carbon is discharged by a cut-out valve. . At this time, measures such as applying vibration with a vibrator and blowing dry air have been taken as measures for preventing the crosslinking phenomenon.
The same applies to the weighing device. In addition, from the process of dissolution, measures such as water washing and air blowing have been taken in order to deal with troubles caused by solidification and clogging of powdered activated carbon due to moisture absorption. The number of auxiliary devices used for such measures is increasing, and the control becomes complicated.

Due to such restrictions, the powdered activated carbon injecting equipment has many auxiliary equipments, the initial cost is high as a construction cost including a building to be housed, the number of equipments for maintenance is large, and the medium and large scale is relatively well managed. It has been installed in limited facilities.

[0006] In recent years, along with the deterioration of the water quality of the tap water source, there are many cases in which it is urgently necessary to inject powdered activated carbon, and even in small-scale water purification plants, injection of powdered activated carbon is considered. However, there are some cases in which the equipment cannot be easily installed due to problems such as equipment initial cost, installation space, and maintenance.

The present invention has been made in order to solve the above-mentioned problems, and makes the structure of the powder activated carbon storage tank and the transfer method advantageous for the plane arrangement type, and suppresses the space in the height direction. By using pneumatic transportation as the method of transfer to the injection point, it is possible to prevent problems due to moisture absorption of powdered activated carbon, significantly reduce the number of auxiliary equipment, reduce the initial cost, and perform maintenance. The purpose is to be able to easily and inexpensively.

[0008]

In order to achieve the above object, the powdered activated carbon injecting apparatus of the present invention is a powdered activated carbon storage tank characterized by adopting a rectangular closed container having a vibration supply device built into its main body, Quantitative feeder with cyclone separation device, suction agitator characterized by sucking powdered activated carbon at the injection point by ejector method and performing mixing and stirring at the same time, mutual air transportation piping, instrumentation control for control It is composed of devices and the like.

By adopting a rectangular closed container for the body of the powder activated carbon storage tank, space saving can be achieved as compared with a conical container. In addition, by equipping the lower part of the storage tank with a vibration supply device that enables constant discharge by utilizing the bridging phenomenon, a gravity discharge valve is not required, and the bridging phenomenon is destroyed by itself and at the same time powdered activated carbon is supplied. You can The powdered activated carbon discharged to the transfer pipe at the bottom of the powdered activated carbon storage tank by the vibration supply device is transferred to the fixed amount supply device by the circulating air transfer by the activated carbon transfer fan.

In the constant quantity feeder, the powdered activated carbon supplied by air transfer from the powdered activated carbon storage tank is separated by a cyclone separator. The separated transfer air is circulated back to the powder activated carbon storage tank. By adopting this method, the arrangement of the powder activated carbon storage tank and the fixed amount supply can be changed from the vertical arrangement to the planar arrangement. By adopting the circulating air transfer in the transfer method, it is possible to prevent the powdered activated carbon from leaking and scattering to the outside.

The powdered activated carbon supplied to the constant quantity feeder is separated by the cyclone separator, and then temporarily stored and supplied to the powdered activated carbon injection pipe by the lower rotary discharge device. The injection amount can be measured by a method of provisionally adjusting the number of rotations of the rotary discharge device, a method of measuring the weight of the constant quantity feeder and performing feedback control, or the like.

The powdered activated carbon, which is supplied to the powdered activated carbon injection pipe in a fixed amount from the constant amount feeder, is pneumatically supplied to the suction stirrer installed at the injection point. The method of pneumatic transportation is to generate a negative pressure by the ejector method by passing the treated water flowing into the mixing tank through the suction agitator, and to suck the air from the pressure reducing control valve installed at the feed point of the constant quantity feeder. , The powdered activated carbon supplied is transferred by air. If the condition of the treated water flowing into the mixing tank does not meet the operating conditions of the ejector, a method of operating the ejector by suctioning a circulating pump or the like can be adopted. The powdered activated carbon that has been sucked and has reached the mixing tank is stirred with the treated water at the inlet of the mixing tank by the stirring function provided in the suction stirrer.

When the distance from the powder activated carbon injection device to the injection point is long, it is possible to introduce pressure water into the powder activated carbon injection device, suck the ejector inside the device, and supply it as the activated carbon slurry liquid to the injection point. .

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of a powder activated carbon injection device. In the figure, activated carbon powder storage tank 1
Employs a rectangular closed container, the structure of which is configured as shown in the figure.

Powdered activated carbon is stored in the powdered activated carbon injection device. As a method for receiving the powdered activated carbon, a suction fan 3 suctions and receives a flexible hose 31 from a flexible container bag or the like carried through the powdered activated carbon storage tank 1. The sucked powdered activated carbon is evenly dropped by the powder level distribution device 11 in the powdered activated carbon storage tank 1. Further, the suction air containing dust of powdered activated carbon is completely separated by the bag filter 12 installed at the upper part of the powdered activated carbon storage tank and discharged to the outside of the apparatus.

The powdered activated carbon stored in the powdered activated carbon storage tank 1 is discharged in a fixed amount by a vibrating feeder 13 installed in the lower portion of the storage tank, and a fixed amount supply device is provided in an activated carbon transfer pipe 32 by circulating air transportation by an activated carbon transfer fan 4. Will be sent to 2.

In the constant quantity feeder 2, a fixed amount of the powdered activated carbon sent from the activated carbon transfer pipe 32 is separated and stored by the cyclone separator 21 and weighed. The separated transfer air of the powdered activated carbon is returned to the powdered activated carbon storage tank 1 again through the circulation air pipe 33 as the circulation air.

The powdered activated carbon temporarily stored in the constant quantity feeder 2 is supplied to the powdered activated carbon injection pipe 3 at the lower rotary type discharging device 22.
4 is supplied in a fixed amount. The amount of injection is measured by a method in which the number of revolutions of the rotary discharge device 22 is provisionally set, and the constant amount feeder 2
It is possible to employ a method of measuring the weight of the above and performing feedback control.

The powdered activated carbon, which has been supplied in a fixed amount from the fixed quantity feeder 2 to the powdered activated carbon injection pipe 34, is carried to the powdered activated carbon injection point by pneumatic transportation. A suction stirrer 6 is installed at the powder activated carbon injection point, and the powder activated carbon supplied by pneumatic transportation is sucked by an ejector method and simultaneously mixed and stirred. If the inflow condition of the treated water at the injection point does not satisfy the condition for activated carbon transfer, a venturi scraper (not shown) can be installed to adjust the condition. Also, if the distance to the powder activated carbon injection point is long and the conditions for air transfer are not met,
Introduce pressured water into the device and suck it by the ejector method.
It is also possible to transfer the slurry to the injection point (not shown).

When the powdered activated carbon is stored in the powdered activated carbon injection device and the injection of the powdered activated carbon is suspended for a long period of time, the dry air source device (for maintaining the quality of the powdered activated carbon constant and maintaining the condition of the equipment pipes) (Not shown).

[0021]

As described above, the powdered activated carbon injecting device of the present invention has a conventional powdered activated carbon storage tank having a conical shape to a rectangular closed structure, and pneumatic transportation is used for moving the powdered activated carbon between devices. By adopting this, the installation space will be arranged in a plane and the number of devices will be greatly reduced to save space. Furthermore, by increasing the airtightness of each device and adopting air transfer by suction, it is possible to prevent the powdered activated carbon from leaking and scattering outside the device, and reduce the risk of dust explosion, and ease the installation conditions of the device. It can contribute to easy handling and labor saving.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a schematic view of another conventional powder activated carbon injection device.

[Explanation of symbols]

1 powdered activated carbon storage tank 2 fixed quantity feeder 3 suction fan 4 Activated carbon transfer fan 5 Intake control valve 6 Suction stirrer 11 Powder level distribution device 12 Bug filter 13 Vibration supply device 14 manholes 15 Internal monitoring window 16 Powder level detector 21 Cyclone separation device 22 Rotary discharge device 31 Receiving hose 32 Activated carbon transfer pipe 33 Circulating air pipe 34 Powder activated carbon injection tube 61 Exhaust fan 62 air knocker 63 discharge valve 64 weighing feeder 65 melting tank 66 infusion pump 67 Activated carbon slurry injection point 68 Stirrer 69 activated carbon lorry 70 Activated carbon receiving pipe 71 Air piping 72 Air supply valve 73 Activated carbon slurry injection pipe

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65G 65/40 B65G 65/40 BF term (reference) 3E070 AA02 AB11 DA01 RA02 RA30 VA17 WG07 3F047 AA03 AA12 AA15 BA01 BA02 CA02 CA10 CA13 DB01 3F075 AA08 BA02 BB02 CA06 CA09 CB01 CB16 CC15 CD01 CD14 DA10 DA20 4G068 AA02 AB22 AD37 AD39 AD44 AE01

Claims (5)

[Claims] 1. A powdery activated carbon is supplied from a powdered activated carbon storage tank having a built-in vibration discharging device by a constant quantity feeder having a cyclone separating device for receiving the powdered activated carbon by pneumatic transportation. Powder activated carbon injection device. 2. The powder activated carbon storage tank according to claim 1, characterized in that the main body is a prismatic closed container, and a distribution device for preventing variation of the activated carbon powder level at the time of receiving the powder activated carbon, and a suction receiver. The activated carbon powder storage tank according to claim 1, further comprising a suction fan for performing the above. 3. The powdered activated carbon storage tank according to claim 1, characterized in that the main body is a prismatic closed container, and quantitatively by utilizing the crosslinking phenomenon of the powdered activated carbon stored at the time of supplying the powdered activated carbon. The activated carbon powder storage tank according to claim 1, further comprising a vibration supply device for discharging. 4. A cyclone separator is provided for separating the powdered activated carbon supplied by pneumatic transportation from the powdered activated carbon storage tank according to any one of claims 1, 2 and 3, and weighing for quantitative supply is performed, The constant quantity feeder according to claim 1, wherein the constant quantity is supplied by a rotary valve. 5. The powdered activated carbon injecting device according to claim 1, 2, 3 or 4, wherein the activated carbon powder is supplied from the activated carbon injecting device by pneumatic transportation using the inflow of treated water at the injection point. The suction stirrer is characterized in that it is sucked in and mixed and stirred simultaneously.