JPS6031826A - Deodorizing method and apparatus - Google Patents

Abstract

PURPOSE:To perform the adsorptive removal of a malodorous component, by mixing a void forming material with a base material consisting of clay and silica rock while baking the resulting mixture. CONSTITUTION:65-35pts.wt. of silica rock and 35-65pts.wt. of clay are put in a pot mill to be mixed and, after saw dust is added to the resulting mixture so as to be uniformly dispersed therein, water is added and mixed to form a compound which is, in turn, introduced into a mold frame having a desired shape while the molded one is dried and baked at 1,200-1,850 deg.C to obtain a deodorizing material A. This deodorizing material A is immersed in an aqueous solution containing 0.2% of a silicone water repellent to be impregnated with a hydrophobic agent and, thereafter, the impregnated one is heated at 130-300 deg.C to obtain a deodorizing material. In addition, a deodorizing material C is obtained by mixing the deodorizing material A and the deodorizing material B with activated carbon. These deodorizing materials A, B, C are used independently or in a mixed state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to industrial exhaust gases such as ammonia and sulfide gases, which can be used to produce heat, tobacco odors in rooms, food odors in refrigerators, human waste odors, oil odors in automobile exhaust gas, gases from combustion tools, etc. The present invention relates to a deodorizing method for the purpose of removing and reducing all odor components contained therein, and a deodorizing device embodying the method.

Conventional deodorizing methods and deodorizing equipment basically use activated carbon as a deodorizing material to adsorb and remove odor components, but when activated carbon is used alone, some odor components cannot be removed. In cases where deodorizing gas can be removed, it is possible to increase the deodorizing effect by increasing the contact surface area of activated carbon with the deodorizing gas tatami mat to increase its adsorption capacity, but there are problems with the activated carbon raw materials, firing conditions, etc. There it is,
There is a natural limit to the increase in deodorizing capacity, making it difficult to maintain a good deodorizing effect, and it is difficult to reactivate activated carbon that has absorbed odor components up to its deodorizing capacity so that it can be reused. Matobara: It was difficult. History (2) Most deodorizing gases are a mixture of only deodorizing components and static electricity.
However, it is difficult to imagine that the actual deodorizing gas is water vapor or atomized 1.
Odor components often exist in the air as adhering or dissolving odor components (42). The problem remains that the presence of water or oil components inhibits the removal of odor components, or that the Fi deodorizing ability is extremely reduced.

The gist of the deodorizing method of the present invention, which was developed to solve the conventional deodorizing method using activated carbon (3) as described above, is that clay, silica stone, and pore-forming materials are mixed and fired to form clay. Sintering the silica stone and burning off the pore-forming material,
The burned residue is made into a cavity, and the porous inorganic material with fine pores of 42 clay and silica stone sintered structure part number 2 heat number is made into powder or grains in the shape at the time of firing or by crushing. As a deodorizing material [there are 62 uses, below group #I]
To explain this invention, the deodorizing method according to the present invention uses clay and silica stone as a base material, and uses porous ceramics created by firing a mixture of clay and silica stone as a basic material, and uses this basic material as a base material. Use it as a deodorizing material A as it is, or use it as a deodorizing material B in which the basic substance has been subjected to hydrophobic treatment,
Alternatively, the deodorizing material A and/or the deodorizing material B and the deodorizing material C mixed with activated carbon may be used separately or each of the deodorizing materials A, B,
A deodorizing gas 1' containing the odor components to be removed is formed by molding C into a predetermined shape and forming a multilayer (combining two or mixing desired amounts of each deodorizing material A and BC as powder or granules). Odor components are removed by bringing the deodorizing gas into contact with the deodorizing material and passing the deodorizing gas naturally or forcefully through a column filled with such a deodorizing material, for example.

Here, the porous ceramic as the basic substance is kneaded, the kneaded material is made into an appropriate shape such as a block or a cylinder, dried, and then fired to sinter the clay and silica stone and create a pore-forming material. A specific example of deodorizing material A is silica stone 500K? % clay 5009, sawdust as a pore-forming material 1000 Hz, and water 85006. First, silica stone and clay were mixed in a pot mill, etc., and sawdust was added to this and mixed for 42 hours so that it was evenly dispersed. Add water, mix it, form the desired shape, dry it to a certain state by natural drying or forced drying, etc., and then dry it at a temperature of 1.
By firing at 200°C to 1B50''C, deodorized +A made of porous ceramics mainly composed of SiO City weight department, clay approx. 85~
Select from 65 parts by weight 1. If the ratio of the combinations is 100 parts by weight, it can be used for deodorization in the present invention.
I used clay containing 40% SiO□, but was it 5i02 or AJ as clay? 20. When using a product with a content 8 times that of 42, the formation of fine pores in the fired product is insufficient, making it impossible to use it as a deodorizer.
Shakui Shakushi≠Shi - Historically, the 5i02 arrangement in the fired product (with one Al2O,1', Si02 is 80 to 45% by weight, AI!20.i
For both, a range of 15 to 40% by weight is desirable, and the lower limit of each, that is, SiO□ is 45% by weight or less, AI! 20Il
If I is less than 15% by weight, it is not possible to obtain the preferred porous ceramics of I used in the present invention, and
It has been found that cases where iO2 is 80% by weight or more and Al2O is 40% by weight or more are not preferable for the same reason.

Next, deodorizing material B is a porous ceramic produced in the same manner as the above-mentioned deodorizing material A (treated with two-line water; a specific example is a porous ceramic obtained in accordance with the above-mentioned example). The material was immersed once in a 0.2% aqueous solution of silicone thread repellent to impregnate it with a hydrophobic agent, then pulled out and dried, and then heat-treated by heating at 180 - aoot' for 2 hours or more.

History (2) Deodorizing material C is a mixture of either or both of the above deodorizing material A and deodorizing material B in the form of powder or granules of an appropriate diameter and activated carbon, and the mixing ratio is such that it is suitable for adsorption and removal. Depending on the target odor component, if the amount of activated carbon mixed is increased, the adsorption removal effect will increase when food ingredients contain one or two or three odor components. rmonia, mercaptans.

The deodorizing effect will be reduced if it contains various organic compound odor components such as thioethers, aldehydes, and indoles, and if the amount of active carbon mixed is extremely small, the deodorizing effect will be reduced.
11. In order to reduce the odor adsorption and removal effect, it is usually desirable to make the amount of deodorizing material A and/or deodorizing material B about 50 to 75% by weight and the amount of activated carbon about 50 to 25% by weight.11. stomach. In addition, the mixing method is not only as described above-1 by mixing the powder or granules of fired deodorizing material A and/or deodorizing material B with activated carbon, but also by mixing deodorizing material A and/or deodorizing material B and activated carbon, respectively. It is also possible to form a plate-like or cylindrical shape and integrate them in a polymerized state to form a deodorizing material C tube, or to form the deodorizing material A or B into a predetermined shape and spray activated carbon onto the surface of the deodorizing material A or B.

Next (2) Describing specific examples of the deodorizing method of the present invention,
First, a deodorizing column and sample gas are prepared as follows.

Galanu tube 20, 9y filling (filling density 0.05 P)
/cdl) and seal both ends with cotton.

Sample Ganu: Tobacco smeller tobacco smoke (approximately 1 piece and highlight)
is introduced into the Tetra bag 101 and then diluted with clean air to prepare a sample gas 104'.

Ammonia odor: Prepared under the same conditions as the tobacco odor above.

) ftv iy-ffpr) y (MIBK)
; MIBKlOμJ is injected into a 1 g vacuum collection bottle that is sufficiently depressurized, and after vaporization, the pressure is brought to normal pressure with clean air to prepare a sample.

Methyl disulfide: Prepared under the same conditions as MIBK above.

Example 1. (Test on changes due to flow rate of sample gas) As shown in Figure 1, a 10g Tetra-Pak b, a pump c1, and a flow meter d were connected to the deodorizing column a, and the flow rate of the sample gas was adjusted to 0.2 + 0.5 + 1. The sample gas flowing out of the deodorizing column a was collected by the collection bag e under each flow rate condition of 01/rnin and analyzed. For the analysis of tobacco and ammonia odors, the three-point comparison odor bag method (according to the 1976 Sensory Test Method Investigation Report published by the Special Pollution Division, Air Quality Conservation Bureau, Environment Agency) was used, and the analysis was conducted with six panelists. MIBK and methyl disulfide were quantitatively analyzed using Gaku chromatography method I.

As a result, the experimental values shown in the graph shown in Figure 8 were obtained. In each graph, A indicates deodorizing material A, and C indicates deodorizing material 0.7. In addition, the deodorization rate at 2 mouths in Figure 8A is calculated using the following formula.

, - - /min
No change was observed in the range from l to Ol/1nin,
Deodorizing material A showed a deodorizing rate of 100%, and deodorizing material A had a deodorizing rate of 0.
At a flow rate of 5 i/111 inch or less, the deodorizing efficiency was as high as Osho, but it was observed that as the flow rate increased, the deodorizing effect decreased.

Figure 8 In the case of ammonia odor at the mouth, although the deodorizing efficiency of both deodorizing material A and deodorizing material C is low at about 10 to 40%, the change in flow rate 42 is hardly affected, especially at flow rate 0.5 ~L, Ol
It was confirmed that a constant deodorization rate was exhibited within the range of /min.

The deodorizing experiment of methyl disulfide in MIBK, Fig. 8, 1 was to measure the concentration change accompanying the change in flow rate (1).
00pp and the outlet concentration is expressed in ppm. According to No. 8Nb62≠, the deodorizing effect of deodorizing material C is not affected by the flow rate 42, and the analytical value is 1 ppm at any flow rate.
The results are extremely good, indicating that the deodorizing effect of deodorizing material A decreases as the flow rate increases.

Furthermore, the results for methyl disulfide shown in FIG. 8 1 are also confirmed to be approximately the same as those for MIBK shown in FIG. 8 8 above.

Example 2. (Deodorization test using circulation 62) As shown in Figure 2, connect 62 deodorizing columns a (2 IOI! Tetra bag b, pump C, and flow meter d,
Sample gas flow rate 0.54! The gas was circulated at a rate of /1 nin, and 62 sample gases were sampled at regular intervals for analysis. In addition, sample gas preparation, filling of deodorizing material, analysis method, deodorization rate, concentration calculation method, etc. (two conditions shall be the same as in Example 1.).

Results In the case of the tobacco odor shown in Figure 4A, deodorizing material C has a deodorizing rate of 1009 20 minutes after circulation, and deodorizing material A has a low deodorizing rate of 10% 20 minutes after circulation. 1-If the circulation was continued, the deodorization rate suddenly increased. Figure 4: Regarding the ammonia odor at the mouth, it will be removed after about 40 minutes.
It became clear that the deodorizing rate of deodorizing material A was 10 to 20% lower than that of deodorizing material C, although the deodorizing rate of both %C and 62 increased.

In addition, MIBK and 2 (fluidized methyl 1: as shown in Figure 4, It shows.

Example 8. (Deodorizing test when deodorizing material is left in sample gas) 1 Oy of each of deodorizing material A and deodorizing material C was filled into a bag made of breathable analytical tissue paper, and this was placed in the sample gas atmosphere for 6 seconds. After leaving it for a certain period of time, two sample gases were collected and analyzed.

As a result, when there are 6 cigarette smells, as shown in Figure 5, No. 2, in the case of deodorizing material C, the deodorizing rate reaches 100% after about 6 hours, demonstrating a high deodorizing effect, but in the case of deodorizing material A, the deodorizing rate is about 5%:'- It is clear that the sample gas needs to flow. Regarding ammonia odor, as shown in Figure 5, 80-90% of deodorizing material A%C after 6 hours.
The deodorizing rate was , indicating a relatively good deodorizing effect.

As for MIBK and methyl sulfide Fuyu, as shown in Figure 5 (c), in the case of No. 2 deodorizing material C, the No. 2 odor concentration decreased over time, showing a good deodorizing effect, and in the case of deodorizing material A, the deodorizing effect was low. "C" means that there is little or no expectation.

Example 4: Deodorizing material A4 was heated to dehydrating material B, which had been subjected to hydrophobic treatment.Experiments were conducted under the same conditions as Examples 1-8. It was confirmed that almost the same results were obtained.

Example 5: Mixing deodorizing material A and/or deodorizing material B and deodorizing material C at a predetermined ratio (7° C.) A deodorizing experiment was conducted under the same conditions as Examples 1 to 8. It was found that depending on the mixing ratio of 42, each deodorizing material showed an intermediate value when used alone.

Example 6: Each deodorizing material A was mixed with the sample gas in an oily atmosphere, for example, a volatile oil such as gasoline.
, B, and C were separately tested under the conditions of Example 2, and it was found that the deodorizing effect shown in FIG.
However, for deodorizing material B, the deodorizing effect is almost negative #
It is clear that this will not affect the

For example, if you use a urine/urine vacuum truck at a temperature of 28°C in altitude and 80°C in exhaust gas flow rate, the exhaust gas outlet during vacuuming:'
:, We conducted a comparative experiment on the deodorizing effect when a mixture of deodorizing material B and deodorizing material C of the present invention was filled in an activated carbon tank which was conventionally IIV (-1) and when it was filled using the conventional activation method. .

As a result, in the case of the original odor, urine gas becomes odorless after being diluted 170,000 times, whereas in the case of conventional deodorization using active PG2, the deodorized gas must be diluted 70,000 times to become odorless.1 In the case of the present invention, the gas t-a after deodorization
When diluted oooo times, it became odorless. Therefore, it is clear that the deodorizing method of the present invention has a deodorizing effect more than twice that of the conventional deodorizing method using activated return elements even if the amount of deodorizing material used is approximately 15% as described above. In addition, when using the conventional reactivating element, the active element could not be used for a long time due to the oil minut contained in the urinary urinary substance, but in the case of the present invention, the lipophilic deodorizing material B'tl- It has become clear that the mixture can be used for a longer period of time than in the conventional example.

Example 7: An experiment was conducted to compare the deodorizing effects of deodorizing materials A, B, and C under the conditions of Example 2 by mixing water vapor into the sample gas, and it was found that deodorizing material B was given lipophilicity, that is, hydrophobicity. However, it was found that the presence of moisture had almost no adverse effect on the deodorizing effect for the two deodorizing materials A and C1.

The deodorizing method of the present invention as described above (according to Part 2, clay,
Based on deodorizing material A made by sintering silica stone as a main composition, deodorizing material B made by water-treating two or more of this deodorizing material At, activated carbon is added to deodorizing material A and/or deodorizing material B. Mix C
The deodorizing materials C are stacked separately or in a selected combination [7] A gas containing the odor components to be removed is folded and forced into air at a selected flow rate, or left in the gas (12) to bring them into natural contact. Effective deodorization can be performed with
Regarding the deodorization of starved bodies that do not contain any oil and only contain bad breath components, the deodorizing effect of deodorizing material C is outstanding in °C, and this deodorizing material C has the deodorizing effect and activity due to the hollow ceramic. The synergistic effect of the deodorizing effect of carbon makes it possible to expand the range of odor components that can be deodorized.

In the case of gas containing moisture, deodorizing material A and deodorizing material C are good, and in the case of oily gas (deodorizing material B is effective), depending on the atmosphere of the deodorizing gas, each of these deodorizing materials If selected and used in combination, more effective deodorization can be achieved.In addition, each deodorizing material is a hollow ceramic material based on a sintered body of clay and silica stone, so after deodorizing (2 predetermined temperatures (usually There is an advantage that the adsorbed odor components can be easily removed by folding and heating (above the adsorption temperature) and the adsorbed odor components can be activated for reuse.

Next Shishiji Other invention 1 of the present application: To explain the deodorizing device based on a specific example, a container 1 has only an inlet 5 and an outlet 8 as openings, and has a hollow part 2 inside so that it can be filled with a deodorizing material. A hydrophilic deodorizing material obtained by mixing and firing clay, silica stone, and pore-forming material A1 The deodorizing material A6 Nishi11 A lipophilic deodorizing material B subjected to hydrophobic treatment with a corn-based water repellent; Deodorizing material C, which is a mixture of powder and granular activated carbon of material A and/or deodorizing material B, is molded into a predetermined shape 42, or powdered or granular. 11. According to the embodiment shown in FIG. 6, the container 1 has a hollow part 2 inside, and a hollow part 6, an inlet 5, and an inlet space 6. Consisting of a combination 42 of an outlet lid 7 having an inlet 4, an outlet 8 and an outlet space 9,
The hollow part 2 of the body part 6 has a partition wall 1 which divides the triple cylinder structure 6 into two sections, and a through hole 12 formed at the entrance side end (lower end in the figure) of the folded inner cylinder 11 (the inner cylinder 11 and the inside of the inner cylinder 11). A notch 16 that connects the inlet space 6 in the inlet lid 4 and has an outlet side end.
The middle cylinder 14 communicates with the lower end of the outer cylinder 16 through the notch 15 formed at the lower end, and the inside of the outer cylinder 16 has an opening 1' at the upper end. The outlet space 9 in the cylinder 7 is configured to be able to communicate with each other, and the deodorizing material A is stacked inside each cylinder.

B and C are selectively fitted together. For example, if the deodorizing gas contains oil, the whole cylinder 62 may be fitted with a lipophilic deodorizing material B, or the inner cylinder 11 may be fitted with a deodorizing material B.
．． By selectively fitting the deodorizing material A or the deodorizing material C into the inner cylinder 14 and the outer cylinder 16, the oil content in the gas flowing in from the inlet 5 is removed together with odor components (after being removed by the deodorizing material B,
History 62 The deodorizing material A or C located on the outside removes odor components and enhances the deodorizing effect, and also prevents the deodorizing ability of the deodorizing material A or C from decreasing due to oil-1, and prevents the deodorizing gas from decreasing. If odor components containing water vapor adhere to water droplets and are significantly dissolved in water, Shiji will add deodorizing material A to the inner cylinder 1.
The inner cylinder 14 and the inner cylinder 16 are fitted with a deodorizing material C with high deodorizing power. It is intended to prevent this. In theory, the deodorizing device of the present invention has a multi-tubular structure 6 as described above, and the interior of the hollow portion 2 is divided into a plurality of stacked compartments 6, and the partition wall between each compartment is formed of mesh net. Even if the compartment is selectively filled with deodorizing materials A, B, and C in appropriate granular form, the interior of the hollow portion 2 is
It is also possible to fill two bags made of breathable fabric with each of the deodorizing materials A, B, and C as a chamber, and to place the desired number of bags in an appropriate order in a stacked or side-by-side manner. be.

In this way, the deodorizing device M1 according to the present invention/2: According to the inlet 5
, L: Inside a container 1 having an outlet 8, various odor components can be adsorbed and removed by simply filling a deodorizing material based on a sintered body of clay or silica stone, and each deodorizing material can be reactivated by firing. can be done easily. Furthermore, an atmosphere of deodorizing gas (hydrophilic deodorizing material A, lipophilic deodorizing material B, and LFC deodorizing material C, which has a high deodorizing ability due to the addition of active elements) are selectively combined in the container 6. By using a two-fitting device, it is possible to effectively adsorb and remove odor components attached to or dissolved in moisture and oil in deodorized gas.
This water and oil content can prevent the deodorizing ability of the deodorizing material A or B, especially the deodorizing material C, from decreasing.

[Brief explanation of drawings]

Figures 1 and 2 are flow sheets showing examples of the deodorizing method of the present invention, and Figure 8 is a graph showing the relationship between the flow rate of the deodorizing gas and the deodorizing effect. 1 contains MIBK, and 2 contains methyl disulfide as an odor component. Figure 4 is a graph showing the relationship between the contact time of the deodorizing gas and the deodorizing material by forced power transmission and the deodorizing effect. It is something that Figure 6 is a graph showing the relationship between the contact time of deodorizing gas and deodorizing material and the deodorizing effect according to natural contact.A is tobacco odor, mouth is ammonia odor, C is MIBK, and 2 is methyl disulfide as an odor component. It includes. FIG. 6 is a sectional view showing an embodiment of the deodorizing device of the present invention. A: Hydrophilic deodorizing material, B: Lipophilic deodorizing material, C: Activated carbon mixed deodorizing material. 1: Container, 2: Hollow part, 6: Body part, 4: Inlet cover, 5: Inlet, 6: Inlet space, 7: Outlet cover, 8: Outlet, 9: Outlet space, 10: Partition, 11: Inner cylinder , 12: through hole, 16: notch, 14: middle cylinder, 15: notch, 16: outer cylinder, 17: opening. Patent applicant: Filton International Co., Ltd. Figure 3 (c) (a) (''BI/m1n) jin) (2)) Figure 4 υ\) (a) jin) (b)) Figure 5 (eight) B) Jin) (B) 86 Figure 8 Procedural amendment September 19, 1981 1, Indication of the case Patent Application No. 140816/1982 2, Name of the invention Deodorizing method and deodorizing device 3, Person making the amendment Case and Relationship between: Patent applicant Toro Station Building, 1-4-9 Nishi-Shinbashi, Minato-ku, Tokyo Voluntary 6, Detailed explanation of the invention in the specification subject to amendment 7, Contents of the amendment l) Specification No. 5 The line 12-18 of the page "Contains 40% Si, 0Q 40% by weight" is replaced by rAt!
lOa Tt 40 weight 31% Si, Oit-40
*& Yes” is corrected.

Claims (1)

[Claims] See) A porous deodorizing material A made by adding and mixing clay, silica stone, and 62 pore-forming materials and firing, and a porous deodorizing material A made by adding and mixing clay, silica stone, and a pore-forming material, firing it, and then subjecting it to hydrophobic treatment to remove odors. A deodorizing method characterized by contacting a material B, the deodorizing material A, or a deodorizing material C in which activated carbon is mixed with powder or granules of the deodorizing material B, individually or in combination, with a gas. 2) Deodorizing material A made by mixing and firing clay, silica stone, and a pore-forming material; deodorizing material B, which also mixed and firing clay, silica stone, and a pore-forming material and then subjected to hydrophobic treatment; and deodorizing material A or deodorizing material B. The deodorizing material C made by mixing powder or granules with activated carbon is divided into sections and filled in two ventilated containers in any order,
Alternatively, a deodorizing device in which each deodorizing material is mixed and filled into a container.