JP3207140U - Recycler for fine activated carbon - Google Patents

Abstract

A fine powder activated carbon regenerator capable of exhibiting high functional regeneration efficiency and maintaining a high regeneration recovery rate is provided. SOLUTION: Supply means 2 for supplying spent finely divided activated carbon is provided in a regeneration chamber 1 equipped with an off-line pulse jet bag filter 1A (a system in which pulse injection is performed with the line shut off). A recovery mechanism 4 for connecting the hot air supply duct 3 and recovering the regenerated finely powdered activated carbon is provided. The off-line puljet is performed at a jet of 0.1 second at 6 kg / cm 2 (centimeter square meter). The supply means 2 is a pneumatic transport system. The collection mechanism 4 uses a rotary valve. [Selection] Figure 1

Description

  The present invention relates to an improvement of a regenerating apparatus for finely powdered activated carbon that performs deodorization mainly using activated carbon with a dust collector so that the activated carbon can be recycled.

In industries where odor generation is significant, such as foundries, it has been required to improve the work site and the surrounding environment to remove or decompose the generated odor.
Since activated carbon has a deodorizing function, it has been used for many deodorizing purposes for household use, such as odor removal from refrigerators, odor decomposition and elimination in factories.
However, activated carbon has an excellent deodorizing function, but it has a drawback that the deodorizing function is immediately reduced. So far, it has been changed to a way to recycle the deodorizing function by reusing it. It was.

  Generally, what is used as activated carbon for fixed-bed type deodorizers for deodorization so far has a particle size of about 3 mm to 4 mm, most of which is 10 mm to 20 mm granular. Since the granular activated carbon is exchanged in a batch system, the initial deodorizing function is remarkably deteriorated and needs to be replaced immediately. Therefore, it is necessary to develop a regenerating apparatus for regenerating the deodorizing function.

  As this regeneration device, the used activated carbon is heated at 400 to 600 ° C. by a large device (about 200 to 300 million yen) such as a rotary kiln, and the odor is separated from the activated carbon by rotation or stirring. However, the activated carbon is partially pulverized by rotation and stirring and cannot be reused. Usually, the deodorizing function recovers by about 70% to 80% while passing through the rotary kiln, but it is lost by about 20%. It has been. The prior art described above is disclosed in the following document.

JP2009-190019 JP2008-030010 JP2012-176392

  In the above-mentioned conventional technology, although the regeneration of activated carbon is attempted, the function regeneration is also about 70 to 80%, the loss is about 20%, the economy is very bad, and the apparatus is a large-sized rotary kiln. As a result, there was a problem that the replacement ratio of activated carbon was high and the running cost was high.

Incidentally, the odor index of about 24 is the limit in the case of activated carbon having a particle diameter of 10 mm to 20 mm and a fixed bed recovery type. This odor index is shown in Table 1 described later. When used in a deodorizing dust collector of 1500 m3 (Lube) / min, activated carbon requires 33,600 Kg / year and an annual running cost of about 40 million yen.
Therefore, it is required to increase the function regeneration efficiency of activated carbon having an excellent deodorizing function and to suppress recovery loss as much as possible.

  In view of the present situation, an object of the present invention is to provide a pulverized activated carbon regenerating apparatus capable of exhibiting high function regeneration efficiency and maintaining a high regeneration recovery rate.

In order to achieve the above object, the present invention is an activated carbon regenerator for regenerating 60 μm ± 50 μm used fine powder active material used in a deodorizing apparatus,
A supply means (2) for supplying spent finely divided activated carbon is provided in the regeneration chamber (1) equipped with an offline paljet bag filter (1A), and a hot air supply duct (3) is connected to the bottom of the regeneration chamber (1). And a recovery mechanism (4) for recovering the regenerated finely divided activated carbon, a cooling tower (5) for cooling the odor hot air exiting the regeneration chamber (1), and an odor temperature air coming out of the cooling tower (5). A vacuum pump device (6) for suction is provided, a combustion chamber (7) is provided for thermally decomposing the odor temperature air coming out of the vacuum pump device (6), and the hot air coming out of the combustion chamber (7) is heat exchanged The heat exchanger (8) is provided with an air suction port (9), and the air taken in from the heat exchanger (8) is heated to 200 ° C. ± 50 ° C. Through the hot air supply duct (3). It is supplied to the members (1), the pressure reducing pump device in linked the reproduction chamber (6) (1) is configured to produce a reduced pressure of 185kPa ± 20, characterized in that.

According to the device of the present invention, a 60 micron (± 50 micron) fine activated carbon that exhibits an excellent deodorizing function can be recovered at a recovery rate of about 99% and a function recovery rate of about 90% to 95%. It has come to be possible. This result can be realized by exposing finely activated carbon to about 200 ° C. (± 50 ° C.) under a reduced pressure of 185 kPa (± 20 kPa). Although the physical or chemical action of odor separation under this temperature and reduced pressure is not clear, it has been confirmed that an excellent action effect can be exhibited in practice.
The odor hot air is heat-treated in the combustion chamber and released into the atmosphere, so that there is an advantage that the odor hot air can be reduced to the odor index 21.
Other advantages of the present invention will become apparent from the description of the following examples.

In carrying out the present invention, the odor hot air leaving the regeneration chamber (1) is guided to the second regeneration chamber (10) equipped with the online pulse jet bag filter (10A), and the contact time between the hot air and the finely powdered activated carbon. The odor separation efficiency is increased by lengthening the filter, and even if pulverized activated carbon leaks unexpectedly from the regeneration chamber (1), it is filtered and separated in two stages in this chamber and enters the vacuum pump device (6). It is preferable that troubles do not occur by doing so.
Thus, by performing regeneration in two stages, the recovery rate of the deodorizing function of activated carbon can be further improved.

The schematic front view of the whole activated carbon reproduction | regeneration apparatus for performing reproduction | regeneration of the used fine powder active body concerning this invention. Table 1 showing the performance of the present invention Table 2 showing a comparison between the present invention and the prior art

Hereinafter, preferred embodiments of an apparatus for regenerating used fine powder actives according to the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, in the present invention, the treatment is performed on the used fine powder active body of 60 μm ± 50 μm used in the deodorizing apparatus.

This activated carbon regenerator is configured as follows.
A supply means 2 for supplying spent fine activated carbon is provided in a regeneration chamber 1 equipped with an offline puljet bag filter 1A (which is a system in which pulse injection is performed with the line shut off), and hot air is provided at the bottom of the regeneration chamber 1 A recovery mechanism 4 for connecting the supply duct 3 and recovering the regenerated finely powdered activated carbon is provided. The off-line puljet is performed at a rate of 6 kg / cm 2 (centimeter square meter) for 0.1 seconds. The supply means 2 is a pneumatic transport system. The recovery mechanism 4 uses a rotary valve.

  Then, the odor hot air (about 200 ° C.) exiting the regeneration chamber 1 is introduced into the second regeneration chamber 10 equipped with an on-line pulse jet bag filter 10A (which is a system that performs pulse injection without interrupting the line). In addition, the contact time between the hot air and finely powdered activated carbon is lengthened to increase the odor separation efficiency. The on-line puljet is 6 kg / cm 2 (centimeter square meter), and is performed by jetting for 0.1 second.

And the cooling tower 5 (water cooling system) which cools the odor hot air (about 180 degreeC) which came out of the 2nd reproduction | regeneration chamber 10 is provided, and the pressure reduction pump which sucks the odor temperature air (about 40 degreeC) which came out of this cooling tower 5 A device 6 is provided. Here, the decompression pump device 6 is constituted by a gear system. In order to maintain the function by thermal expansion, it is difficult at high temperature, and the air temperature must be suppressed to about 200 ° C.
A combustion chamber 7 is provided for heat-decomposing the odor air temperature (about 40 ° C.) from the decompression pump device 6. Here, a heavy oil burner that can be heated to 600 ° C. is used so that the odor can be thermally decomposed.
The hot air exiting the combustion chamber 7 is configured to be released to the atmosphere via a heat exchanger 8 (heating of air), and the heat exchanger 8 is provided with an air inlet 9 and taken in from here. The atmosphere is heated to 200 ° C. ± 50 ° C., supplied to the regeneration chamber 1 through the hot air supply duct 3, and produces a reduced pressure of 185 kPa ± 20 in the regeneration chamber 1 connected to the decompression pump device 6. It is configured.

  As described above, the activated carbon regeneration for regenerating the used fine powder active substance of 60 microns ± 50 microns used in the deodorizing apparatus is performed by regenerating hot air at 200 ° C. ± 30 ° C. under a reduced pressure of 185 kPa ± 20. The fine powdered activated carbon supplied from the bottom of the chamber 1 and supplied to the regeneration chamber is exposed to the hot air in the reduced pressure state (floating state) to separate and transfer the adsorbed odor to the hot air, and the odor hot air passes through the bag filter. The regenerated fine activated carbon released into the atmosphere after heat treatment and separated by the bag filter is recovered from the regeneration chamber 1.

The odor index referred to in Table 1 is based on the following definition.
Find the dilution factor (odor concentration) when the scented air or water is diluted with odorless air (in the case of water, odorless water) until you no longer feel the odor, and multiply the common logarithm by 10 Define. The calculation formula is as follows. For example, when a malodorous sample is diluted 100 times, when most people do not feel odor, the odor concentration is set to 100 and the odor index is 20.
Odor index = 10 × log (odor concentration) (Example) 10 × log (100) = 20

  In Table 2, the new technology refers to the present invention, where the processing pressure is 185 kPa. However, if the pressure is 185 kPa ± 20, an approximate result is obtained.

  The present invention can be easily implemented using a bag filter function, and can be expected to be implemented not only in a foundry but also in a wide range of fields such as a marine industry where bad odor is generated.

1: Regeneration chamber 1A: Offline puljet bag filter 2: Supply means 3: Hot air supply duct 4: Recovery mechanism 5: Cooling tower 6: Decompression pump device 7: Combustion chamber 8: Heat exchanger 9: Atmospheric inlet 10: First Second regeneration chamber 10A: Online pulse jet

Claims (3)

An activated carbon regenerator for regenerating used fine powder active material of 60 microns ± 50 microns used in a deodorizing device,
A supply means (2) for supplying spent finely divided activated carbon is provided in the regeneration chamber (1) equipped with an offline paljet bag filter (1A), and a hot air supply duct (3) is connected to the bottom of the regeneration chamber (1). And a recovery mechanism (4) for recovering the regenerated finely divided activated carbon, a cooling tower (5) for cooling the odor hot air exiting the regeneration chamber (1), and an odor temperature exiting the cooling tower (5) A decompression pump device (6) for sucking the wind is provided, a combustion chamber (7) for heat-decomposing the odor temperature air coming out of the decompression pump device (6) is provided, and the hot air coming out of the combustion chamber (7) is The heat exchanger (8) is configured to be released to the atmosphere, and the heat exchanger (8) is provided with an air inlet (9), and the air taken in from this is 200 ° C. ± 30 ° C. Through the hot air supply duct (3) Regeneration of pulverized activated carbon, characterized in that it is configured to produce a reduced pressure of 185 kPa ± 20 in the regeneration chamber (1) connected to the vacuum pump device (6) and fed to the raw chamber (1) apparatus.   The odor hot air leaving the regeneration chamber (1) is guided to a second regeneration chamber (10) equipped with an on-line pulse jet bag filter (10A), and pulverized activated carbon leaked unexpectedly from the regeneration chamber (1). The regeneration of finely divided activated carbon according to claim 1, characterized in that it is filtered and separated by an on-line pulse jet bag filter (10A) to prevent intrusion into the decompression pump device (6) in two stages. apparatus.   The fine powder according to claim 1 or 2, wherein the separated fine powder activated carbon of the second regeneration chamber (10) is taken out from the bottom of the second regeneration chamber (10) and collected. Activated carbon regeneration equipment.

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