JP2823506B2 - Porous filler for deodorizing device and deodorizing device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous filler for a deodorizer for deodorizing odorous gas generated in a sewage treatment plant, a wastewater treatment plant, a human waste treatment plant or a livestock farm, and a deodorizer using the same. It is about.

[0002]

2. Description of the Related Art Sewage treatment plants, wastewater treatment plants, human waste treatment plants,
In areas where malodors occur, such as livestock farms, food factories, seafood processing plants, pulp factories, or fertilizer factories, so-called deodorization treatment is performed to remove malodorous components from the gas to be deodorized, including malodorous components collected in order to eliminate malodor. Often applied. The odorous gas generated in the odor generation area includes hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide,
It contains a lot of so-called malodorous substances such as trimethylamine and ammonia. Therefore, the deodorizing treatment is performed by removing the above-mentioned malodorous substances from the collected deodorized gas.

[0003] Such deodorizing treatment can be broadly classified into a wet deodorizing method and a dry deodorizing method. In the wet deodorization method, the gas to be deodorized and the absorbing liquid are brought into countercurrent contact with each other to dissolve the odorous components in the absorbing liquid and undergo chemical treatment to deodorize by a chemical reaction, whereas the dry deodorizing method is used. For example, a physical treatment for adsorbing malodorous components on a porous substance such as activated carbon is applied.

[0004] In recent years, regarding the removal of the offensive odor component, a biological treatment for performing a deodorization treatment based on a principle different from a chemical or physical treatment has been spotlighted. This biological deodorizing treatment searches for naturally growing microorganisms having the ability to decompose the above-mentioned malodorous component, and removes the malodorous component in the gas to be deodorized by utilizing the malodorous component decomposition ability. Things. Since the microorganisms grow in activated sludge usually used in sewage treatment plants and the like, they are often diverted.

[0005] In order to utilize such microorganisms, it is necessary to provide an appropriate growth environment for the microorganisms while increasing the number of microorganisms grown per unit space as much as possible. Therefore, conventionally, a porous material suitable for the growth of microorganisms has been applied as a carrier, and the microorganisms can be implanted and immobilized in the pores of such a carrier, and grown with appropriate water and nutrients. Done. Such a carrier is filled in a predetermined deodorizing tank as a filler, and the deodorized gas collected in the deodorizing tank is introduced into the deodorizing tank and brought into contact with the filler to decompose malodorous components into microorganisms growing in the filler. By doing so, deodorization treatment using microorganisms is performed.

[0006] Therefore, in the biological deodorization treatment as described above, a carrier that forms a growth bed for microorganisms plays an important role. As a carrier for microorganisms, a porous material such as zeolite or activated carbon, or an expandable synthetic resin material such as urethane foam has conventionally been applied. 3-
No. 181312), a lump is formed from a slurry of silica stone or alumina cement, and the lump is calcined to be used as a carrier (JP-A-3-245815). A carrier comprising a mixture of a binder composed of an inorganic substance and a synthetic resin (JP-A-4-9473)
No. 3) has been proposed.

[0007]

By the way, conventional porous materials such as zeolite and activated carbon generally have a very small particle size. For example, in the case of activated carbon, even a material having a maximum particle size of 3 to 6 mesh ( Since there is only a particle size of 3.3 mm to 5.6 mm, when such a small particle is filled in a deodorizing tank, the pressure loss becomes extremely large (for example, 3 to 6 mm).
In the case of mesh activated carbon, the flow rate is about 100 mmAq per 1 m at a flow rate of 0.3 m / sec.) Therefore, an excessive fan must be installed to send the gas to be deodorized into the deodorization tank, which requires equipment cost and operation. It has the disadvantage of very high costs.

The peat disclosed in the above-mentioned Japanese Patent Application Laid-Open No. Hei 3-181312, which has been subjected to a synthetic resin processing, has a low compressive strength and is easily broken, so that it cannot be stacked high in a deodorizing tank. Since the rate must be set low, the processing capacity per deodorizing tank is inferior, and there is a problem that it is easily collapsed during the filling operation.

[0009] In addition, silica or alumina cement disclosed in the above-mentioned JP-A-3-245815 or a soil or underwater sediment of a plant disclosed in the above-mentioned JP-A-4-94733 is used as a raw material. Are extremely low in compressive strength.
This has the same problem as that of the publication.

[0010] The conventional carriers generally do not have good deodorizing efficiency for malodorous components. Therefore, when the concentration of malodorous components is high, a large number of carriers must be used, and the equipment scale of the deodorizing device is large. There is a problem that it becomes.

The present invention has been made to solve the above problems, and has a very high compressive strength.
The pressure loss is very small when filled in the deodorization tank,
Moreover, it is an object of the present invention to provide a porous filler for a deodorizing device capable of creating a growth environment capable of sufficiently growing microorganisms, and a deodorizing device using the same.

[0012]

The porous filler for a deodorizer according to claim 1 of the present invention is used for a microorganism-growing bed for providing a growth environment and immobilizing microorganisms having a function of decomposing malodorous substances. A porous filler for a deodorizing device, wherein the raw coal mainly comprising caking coal is carbonized at 1000 ° C. to 1300 ° C.
It consists of dry distillate obtained by volatilizing volatile components in the raw coal, and the dry distillate has an average particle size of 5 mm to 5 mm.
0 mm, fixed carbon is 80% to 95% by weight, ash content is 5% to 20% by weight, and inner diameter is 50 μm to
It has a large number of pores of 500 μm.

According to a second aspect of the present invention, there is provided a deodorizing apparatus using a porous filler for a deodorizing apparatus, wherein a water spraying means is provided at an upper portion, an inlet for introducing a deodorized gas is provided at a lower portion, and an upper portion is provided at an upper portion. The porous filler for a deodorizing device according to claim 1 is filled in a deodorizing tank provided with a discharge port for discharging the deodorized gas.

[0014]

According to the porous filler for a deodorizer according to the first aspect of the present invention, the dry distillate comprises 10% of raw coal mainly composed of caking coal.
It is obtained by carbonization at 00 ° C. to 1300 ° C., and such a carbonized product has an inner diameter of 50 μm to 50 μm generated at the time of volatilization of a gas generated by volatilization of volatile components in the carbonization process.
Since it has a large number of pores of 0 μm, the specific surface area of these fine through-holes ranges from 0.5 to ⁵ m ² / g and the dry distillate forms an environment suitable for microbial growth and immobilization. At the same time, it is possible to increase the amount of microorganisms carried. When the amount of microorganisms carried is large, the contact area of the microorganisms with the gas to be deodorized is increased, and the deodorizing efficiency is improved accordingly.

[0015] Further, in the dry distillate obtained by the above-mentioned dry distillation, the ash in the raw coal is melted and crystallized at the time of high-temperature dry distillation, and the surrounding carbon components are strongly bonded to each other. As can be seen from application to coke for iron making, the crushing strength is very high, and the compressive strength is very large, for example, 150 kg / piece to 300 kg / piece for a particle size of 20 mm. Therefore, compared to conventional fillers made of lime, ceramics, etc., even if they are stacked in a large amount to form a microbial growth bed, the distillate will not be broken, and they must be filled in a large amount in the deodorizer. And the deodorizing efficiency can be increased accordingly.

Further, even if the layers are stacked thickly, the distance is 5 mm to 50 m.
Since the granular form of the dry distillate m is not easily broken, voids between the dry distillates are effectively secured, and it is possible to set a small pressure loss when gas passes through the layer of dry distillate.

According to the deodorizing apparatus using the porous filler for a deodorizing apparatus according to the second aspect of the present invention, deodorizing is performed by sprinkling water from the upper part by a water sprinkling means on the filler made of the dry distillate filled in the deodorizing tank. By introducing the gas to be deodorized from the inlet of the tank, the gas to be deodorized comes into contact with the microorganisms activated by the water sprinkling, the malodorous components are decomposed by the microorganisms, and the gas is discharged to the deodorization tank as a deodorized gas. Is derived from

[0018]

FIG. 1 is a process diagram showing an example of a production flow of a porous filler for a deodorizing apparatus according to the present invention. As shown in this figure, a filler manufacturing apparatus 1 includes a blending step 2 for blending a plurality of types of powdered raw coal C sent by a conveyor belt, and a dry distillation step 3 for carbonizing blended coal blend M.
And a cooling / cooling step 4 for extinguishing the red-hot product K1 discharged from the carbonization step 3 after the completion of the carbonization and cooling to room temperature.
And a crushing step 5 for crushing the cooled product K2 derived from the quenching step 4 to a predetermined particle size, and a sieving step 6 for sieving the crushed product A crushed in the crushing step 5 to obtain the filler 8. It is composed of

In the blending step 2, a plurality of blended layers 21 are provided, and the fed raw coal C is temporarily stored in a prescribed blended layer 21 for each brand, and is cut out at a predetermined ratio according to a blending plan. Thus, blended coal M can be obtained. As the raw material coal C, a so-called bituminous coal rich in a caking component is used. As the brand, low volatile matter products from the United States, medium volatile matter products, high volatile matter products from the same country, strong caking products from Austria, weak caking products from Japan, high fluidity products from Japan, etc. are suitably used. Is done. These raw coals C are prepared to have a fixed carbon content of 50% by weight or more, an ash content of 5% by weight or more, and a volatile matter content of 15% by weight or more. More preferably, the volatile content is 27% by weight to 32% by weight.
And dilatometer total expansion coefficient
Is adjusted so that the expansion rate when heating is within the range of 50% to 100%.

In the present invention, particularly, the filler 8
The ash value of the water falls within the range of 5% by weight to 20% by weight,
In addition, blended coal M blended so that the fixed carbon is 80% by weight to 95% by weight is prepared. For this purpose, an ash estimation calculation is performed in which the weighted average of the ash values of the respective brands of the raw coal C is divided by the yield of the carbonized product K1.

The fixed carbon value is calculated based on the raw coal C
Since the carbon component in the carbonization is divided into a carbonization product K1 in the carbonization process and a gas G that is discharged from the carbonization step 3 as the gas G, the ash content cannot be calculated as it is. Usually, the fixed carbon value is often obtained by subtracting the value of the ash content by weight from 100.
In order to more accurately determine the fixed carbon value, the past data is analyzed, and for example, the correlation between the carbon component and ash in the raw coal C and the fixed carbon in the carbonized product K1 is calculated to form a multiple regression equation. In some cases, the fixed carbon value of the carbonization product K1 is estimated using such a multiple regression equation.

The ash in the filler 8 sinters during the high-temperature dry distillation of the coal blend M and functions to firmly bind the surrounding carbon components. The value of the ash content is preferably in the range of 5% by weight to 20% by weight as described above. When the ash content is less than 5% by weight, the above-mentioned bonding strength is weakened.
The crystal structure of the ash in the inside hinders the formation of pores. The fixed carbon in the filler 8 having a relationship opposite to the ash value is set to 80% by weight to 95% by weight.

In the above-mentioned dry distillation step 3, the normal blended coal M
A so-called coke oven which carbonizes a large amount and efficiently is applied. In this dry distillation step 3, blended coal M was 1000
C. to 1300.degree. C. for a predetermined period of time to become a carbonized product K1 and discharged to the cooling step 4, and the gas G resulting from the volatile matter in the coal blend M generated in the carbonization step is removed by the gas purification step 7. And then sent out of the system. Note that the present invention is not limited to the application of the coke oven to the carbonization step 3, and a carbonization apparatus other than the coke oven may be used.

The reason why the dry distillation temperature is set to 1000 ° C. to 1300 ° C. is that if the temperature is lower than 1000 ° C., the temperature is too low, so-called hardening phenomenon does not occur, and a hard filler 8 cannot be obtained. Over ℃, coal blend M
Gas is rapidly generated from the carbonization product, resulting in innumerable cracks in the carbonized product K1 and large pores formed in the carbonized product K1. As a result, the obtained filler 8 is brittle in terms of strength and specific surface area. This is because it becomes smaller.

In the cooling step 4, the red-heated dry distillation product K1 discharged in the normal carbonization step 3 is subjected to water spray treatment to be cooled, turned into a normal-temperature cooled product K2 and sent to the crushing step 5. You. It is to be noted that a so-called dry fire extinguishing method may be adopted in which the red-distilled product K1 is introduced into a sealable cooling chamber, and after sealing, an inert gas such as nitrogen gas is fed into the cooling chamber to extinguish the fire.

In the crushing step 5, a rotary crusher 51 having a repulsion plate which normally rotates at a high speed is often used. Crusher 5 rotating at high speed
The cooling product K2 is continuously supplied to the repulsion plate 1 and the cooling product K
2 is crushed to a predetermined particle size.

In the sieving step 6, a sieving machine having a wire mesh provided with a sieve that can obtain the desired particle size of the filler 8 is used. I am getting it. In the present embodiment, a wire mesh having a sieve of 5 mm square to 50 mm square is applied. Therefore, the filler 8, which is a sieve under the wire mesh, has an average particle size of 5 mm to 50 mm. In addition, the refined sieve is used as a reducing material for fuel and steelmaking.

The reason why the average particle size of the filler 8 is set to 5 mm to 50 mm is that if the average particle size is less than 5 mm, the pressure loss with respect to the gas to be deodorized becomes large and the operation of the deodorizing apparatus becomes disadvantageous. If it exceeds, the filling material 8 becomes too large, so that the filling material 8 cannot be effectively used up to the center part on the growth of microorganisms.

FIG. 2 is an enlarged perspective view of a carrier constituting the porous filler for a deodorizing apparatus according to the present invention. As shown in this figure, the filler 8 manufactured by the filler manufacturing apparatus 1 is used.
Is composed of a carrier (distillate) 81 supporting microorganisms and having an average particle size of 5 mm to 50 mm. These carriers 8
1 has an irregular shape as a whole, has a rough surface, and has many irregularities. Then, over the entire surface of the carrier 81, countless pores 82 caused by the gas generated in the carbonization process.
Are formed. The pores 82 are usually through holes.

In the present invention, the diameter of the pore is 50 μm.
m to 500 μm. Regarding the adjustment of the diameter of the pores, the carbonization temperature in the carbonization step 3 is an important point.
By controlling the temperature to 0 ° C. to 1300 ° C., the filler 8 having the above pore diameter can be obtained.

The pore size of the filler 8 is 50 μm to 500 μm
The reason is that if it is less than 50 μm, the pore diameter is too small and microorganisms cannot enter the pores. If it exceeds 500 μm, the specific surface area of the filler 8 becomes too small, This is because the space is narrowed.

The carrier 81 thus obtained has a porosity of 30% to 60% and an apparent specific gravity of 0.4 to 0.7.
It is. Further, the water absorption was as high as 20% by weight to 40% by weight, indicating that the water retention was extremely good. The specific surface area, 1g per 0.5m ² ~5m ² very large,
It has about 10 times the value of conventional microorganism carriers. further,
The compressive strength is 150 kg / piece with a particle size of 20 mm.
It exhibits a very hard value of 300 kg / piece. This value is about 10 times that of the conventional ceramic-based carrier.

The main composition of the ash contained in the carrier 81 is 50 to 60% of SiO _{2 and} 30 to 40% of Al ₂ O _3.
%, CaO is 2 to 6%, and the total of FeO and Fe ₂ O ₃ is 1%.
-5%, and these have acid resistance to sulfuric acid and nitric acid. Therefore, the carrier 81 is very excellent in acid resistance.

The superficial velocity of the filler 8 is 0.3 m / sec.
The pressure loss at the time of c is about 8 when the average particle size is 20 mm.
(MmAq / m packed bed) and about 20 (mmAq / m packed bed) when the average particle size is 10 mm. This value is
The particle size is 1/3 to 2/3 of the conventional product smaller than the product of the present invention.

In the recesses on the surface of the carrier 81 and in the innumerable pores 82, a growth space for microorganisms that decompose malodorous components is formed. Therefore, microorganisms having a function of decomposing and deodorizing hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide, trimethylamine, ammonia and the like, which are malodorous substances generated in a sewage treatment plant, in this growing space, by a metabolic action. By transplanting and adjusting growth conditions such as temperature and wetness, it becomes possible to deodorize the gas to be deodorized. Usually, the transplantation of the microorganism is performed by supplying activated sludge used in a sewage treatment plant or the like to a carrier-filled layer 92 formed in a deodorization tank 91.

FIG. 3 is an explanatory view showing an example of the deodorizing apparatus according to the present invention. As shown in FIG.
A deodorizing tank 91 for deodorizing the introduced gas to be deodorized G1 by the metabolic action of microorganisms and discharging it as a clean gas G2, a circulation pump 93 driven to sprinkle water into the deodorizing tank 91; And a NaOH storage tank 95 storing caustic soda for adjusting the pH of water.

In the deodorizing tank 91, a carrier packed layer (microorganism growing bed) 92 is provided at a substantially central portion in the vertical direction, and the filler 8 composed of the large number of carriers 81 is provided in the carrier packed layer 92. Is filled. The carrier 81 is provided in advance with microorganisms that decompose malodorous substances such as hydrogen sulfide.
A watering pipe (watering means) 93 a is provided above the carrier packed layer 92, and a water tank 9 formed at the bottom of the deodorizing tank 91 is provided.
The stored water W stored in 1c is circulated and used by the operation of the circulation pump 93.

The caustic soda in the NaOH storage tank 95 is supplied to the stored water W stored at the bottom of the deodorization tank 91 by operating the injection pump 95a. The pH value of the stored water W is measured by a pH meter 94 provided in the water tank 91c. Based on the measurement result of the pH meter 94, it is determined whether to inject caustic soda or stop the injection. Start and stop operations are performed.

If the malodorous substance is a sulfur-based substance such as hydrogen sulfide, sulfuric acid is formed, and if the malodorous substance is a nitrogen-based substance such as trimethylamine, nitric acid is formed by the action of microorganisms. become. Therefore, the pH of the storage water W is appropriately returned to neutral using caustic soda as described above.

The replenishing water W1 is appropriately supplied into the water tank 91c, and an overflow pipe 96 having an intake port at the uppermost surface of the stored water W is provided. When supplied, the stored water W is discharged out of the system via the overflow pipe 96.

An introduction port 91a for introducing the deodorized gas G1 into the deodorization tank 91 is provided at a lower portion of the deodorization tank 91, and a deodorized clean gas G2 is discharged to an upper portion of the deodorization tank 91. An outlet 91b is provided. Further, a mist separator 97 and a fan 98 are sequentially provided downstream of the discharge port 91b. By operating the fan 98, the gas to be deodorized G1 is introduced into the deodorization tank 91 through the inlet port 91a, and the carrier is charged. In the layer 92, the odorous substance contained in the deodorized gas G1 is decomposed by contact with the microorganisms supported on the carrier 81 and growing, and the outlet 91b
Is derived from The mist of the gas led out from the discharge port 91b is removed by the mist separator 97, and is discharged to the outside as a clean gas G2.

In the deodorizing apparatus 9 of the present invention, as described above, the packing material made of the carrier 81 for supporting microorganisms having a function of decomposing malodorous substances by metabolic action is added to the carrier packed layer 92 in the deodorizing tank 91. 8 and the filler 8 has an average particle size of 5 mm to 50 mm as described above.
Since the diameter is larger than that of the conventional filler, the pressure loss is not as large as that of the conventional filler, and the operating cost of the fan 98 can be reduced.

The compressive strength of the carrier 81 is 150 kg /
Since it is very large at about 300 kg / piece, the carrier packed layer 9
Even if the thickness 2 is increased, the carrier 81 is not destroyed, so that a very large amount of the filler 8 can be filled in the deodorizing tank 91, and the deodorizing effect can be improved accordingly.

[0044] Further, the specific surface area of the support 81, since significantly larger as compared with the conventional and 1g per 0.5m ² ~5m ^2, spread growth space that amount microorganisms grown more microorganisms In addition, it is possible to immobilize well and the deodorizing effect is improved by the amount of microorganisms and good immobilization.

The following comparative test was conducted to examine the deodorizing effect of the filler of the present invention. That is, the packing material of the present invention is packed in a test column, and the space velocity (SV) is set to 20.
0 (1 / hr), superficial velocity (LV) 0.3 m / sec
And the air to be deodorized was supplied to the column. Hydrogen sulfide is previously mixed into the air to be deodorized so as to have a concentration of 200 ppm. The packed bed is sprayed with water from the top, and the liquid-gas ratio of the sprayed water is 4 liters / q.
m ³ air was set. The watering frequency was once every 30 minutes, and the watering time per time was set to 5 minutes. And, under the above conditions, the air to be deodorized is ventilated to the packed bed for a long time,
The concentration of hydrogen sulfide in the clean air after the deodorization treatment was measured.

As a comparative example, the same ventilation test as described above was performed using a conventional filler. As the filler of the comparative example, a ceramic-based material formed using incinerated ash as a raw material was employed.

Table 1 shows the test results. FIG. 1 shows a graph of Table 1. In FIG. 1, black circles indicate the case where the filler according to the present invention was used, and white circles indicate the case where the filler of the comparative example was used.

[0048]

[Table 1]

As can be seen from Table 1 and FIG. 1, when the filler of the present invention was used, the hydrogen sulfide concentration in the clean air after the deodorization treatment was 0.5 ppb or less regardless of the number of days. In contrast, when the filler of the comparative example was used,
The concentration of hydrogen sulfide in deodorized air from the column is 5ppb ~ 4
It fluctuates greatly between 1 ppb.

This indicates that the filler of the present invention has an excellent deodorizing effect and maintains stable deodorizing performance over a long period of time.

[0051]

As described in detail above, the porous filler for a deodorizer according to the present invention uses 10% of raw coal mainly composed of caking coal.
Dry distillation at 00 ° C. to 1300 ° C. consists of a dry distillate obtained by volatilizing volatile components in the raw coal, which has an average particle size of 5 mm to 50 mm and a fixed carbon of 80 mm.
% To 95% by weight and 5% to 20% by weight of ash
And a large number of pores having an inner diameter of 50 μm to 500 μm.

Therefore, since such a carbonized product has a large number of pores generated when gas generated by volatilization of volatiles in the carbonization process, the carbonized product is useful for the growth and immobilization of microorganisms. A suitable environment is formed, and the amount of microorganisms carried can be increased. When the amount of microorganisms carried is large, the contact area of the microorganisms with the gas to be deodorized is increased, and the deodorizing efficiency is improved accordingly.

In the dry distillate obtained by the above-mentioned dry distillation, the ash in the raw coal is melted and crystallized at the time of high-temperature dry distillation and the surrounding carbon components are strongly bonded to each other. Very high compressive strength. Therefore, compared to conventional fillers made of lime, ceramics, etc., even if they are stacked in a large amount to form a microbial growth bed, the distillate will not be broken, and they must be filled in a large amount in the deodorizer. And the deodorizing efficiency can be increased accordingly.

Further, since the granular form of the distillate is not easily broken even if the layer is thickly laminated, the voids between the distillates are effectively secured, and the pressure loss when passing the gas through the layer of the distillate is set small. It becomes possible.

In the deodorizing apparatus of the present invention, a sprinkling means is provided at an upper portion, an inlet for introducing a deodorized gas is provided at a lower portion, and an outlet for discharging a deodorized gas is provided at an upper portion. In which the porous filler for a deodorizing device is filled.

Accordingly, by introducing water to be deodorized from the inlet of the deodorization tank while sprinkling water from the upper part of the filler made of the above-mentioned dry distillate filled in the deodorization tank with water sprinkling means, the sprinkling was activated. The gas to be deodorized comes into contact with the microorganisms in the filler, and the odorous components are decomposed by the microorganisms,
The gas is deodorized and is discharged from the outlet of the deodorization tank.

Since the deodorizing tank is filled with the filler according to the present invention, the environment for growing microorganisms is appropriate, and the compressive strength of the filler is extremely high.
The filler does not collapse even when laminated to a considerable thickness in the deodorizing tank. In addition, since the particle size is very large, the pressure loss is not so large, the ability of the fan for sending out the deodorized gas can be reduced to the minimum, and the equipment cost and operation cost can be reduced. it can.

[Brief description of the drawings]

FIG. 1 is a process diagram illustrating a production flow of a porous filler for a deodorization device according to the present invention.

FIG. 2 is an enlarged perspective view of a carrier constituting a filler according to the present invention.

FIG. 3 is an explanatory view illustrating a deodorizing apparatus according to the present invention.

FIG. 4 is a graph showing the change over time in the concentration of hydrogen sulfide after the deodorizing treatment of the gas to be deodorized.
Fillers of the present invention are indicated by black circles.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filler manufacturing apparatus 2 Blending process 21 Blending layer 3 Drying process 4 Cooling process 5 Crushing process 6 Sieving process 7 Gas purification process 8 Filler 81 Carrier (dry distillation) 82 Pores 9 Deodorizing device 91 Deodorizing tank 91a Inlet 91b Discharge port 91c Water tank 92 Carrier packed bed (microbial growth bed) 93 Circulation pump 93a Watering pipe (watering means) 94 pH meter 95 NaOH storage tank 95a Injection pump 96 Overflow pipe 97 Mist separator 98 Fan C Raw coal M Coal coal K1 Dry distillation generation Material K2 Cooled product A Crushed product W Storage water W1 Makeup water G Gas G1 Deodorized gas G2 Clean gas

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshiyuki Nakajima 1-25-14 Kannondai, Tsukuba, Ibaraki Prefecture Within the Tsukuba Research Area, Kobe Steel, Ltd. (72) Masaichiro Nishie 1 Kannondai 1, Tsukuba, Ibaraki Prefecture No. 25-14, Kobe Steel, Ltd., Tsukuba Research Area (72) Inventor: Norio Mimura 1-25-14, Kannondai, Tsukuba, Ibaraki Prefecture, Kobe Steel, Tsukuba Research Area (56) References JP JP-A-4-94733 (JP, A) JP-A-3-245815 (JP, A) JP-A-3-181312 (JP, A) JP-A-6-71136 (JP, A) JP-A-6-100311 (JP) , A) (58) Field surveyed (Int.Cl. ⁶ , DB name) B01J 20/20 B01D 53/34

Claims (2)

(57) [Claims] 1. A porous filler for a deodorizing device for a microorganism growing bed, which gives a growth environment to microorganisms having a function of decomposing malodorous substances, and is a raw material coal mainly comprising caking coal. From 1000 ° C. to 1300 ° C. to obtain volatile fractions in the raw coal, which have a mean particle size of 5 mm to 50 mm and a fixed carbon content of 80% by weight to 95% by weight. % And ash content from 5% by weight
A porous filler for a deodorizing device, which is 20% by weight and has a large number of pores having an inner diameter of 50 µm to 500 µm. 2. A deodorizing tank having an upper part provided with a water sprinkling means, a lower part provided with an inlet for introducing a gas to be deodorized, and an upper part provided with an outlet for discharging a deodorized gas. A deodorizer using the porous filler for a deodorizer, wherein the porous filler for a deodorizer according to 1 is filled.