JP2001276199A - Deodorization adsorption oxidizer and adsorption oxidation process by using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive adsorption oxidation process for processing harmful air pollutants by either sprinkling a deodorization adsorption oxidizer into flue gas in an incineration facility or a combustion facility or sprinkling it over the surfaces of materials to be processed, and decomposing these components by sunlight or irradiation with ultraviolet rays in an outdoor disposal facility. SOLUTION: The deodorization adsorption oxidizer is obtained by applying a solution of titanium oxide to the surfaces of zeolite particles having a diameter of 1 mm or smaller, so that the weight ratio of the solution is 2 to 10%, and drying and fixing the solution at room temperature. In the adsorption oxidation process using the oxidizer, the oxidizer is sprinkled into fume gas in an incineration facility or combustion facility to cause adsorption of odor components and pollutants and the dry deodorization adsorption oxidizer is recycled by means of a bag filter, with these components decomposed by sunlight or by irradiation with ultraviolet rays in an outdoor disposal facility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing adsorptive oxidizing agent and a method for adsorbing and oxidizing the same by using the treating agent. The present invention relates to an inexpensive adsorptive oxidation treatment method for treating harmful air pollutants by spraying a surface on a substance to be treated and decomposing those components by sunlight or ultraviolet irradiation at an outdoor disposal site.

[0002]

2. Description of the Related Art Activated carbon, slaked lime, alumina oxide and zeolite are examples of agents for treating air pollutants. Activated carbon is a representative adsorbent that can be tailored to each pollutant and has tremendous reliability in adsorbing ammonia, hydrogen sulfide, trimethylamine and other organic solvents. However, since activated carbon itself is flammable, high-temperature gas such as incineration gas cannot be adsorbed. In addition, the cost of activated carbon is high for adsorbing high-concentration gas components, and the operating cost is extremely high.
Slaked lime, alumina oxide and the like have a drawback that they can be applied only to specific gas components due to their chemical properties. On the other hand, there are the following related arts related to the gas processing apparatus. For example, adsorption tower equipment such as an activated carbon adsorption tower is used for exhaust gas. Slaked lime, alumina oxide and the like also require adsorption equipment. In any case, these equipments are expensive to construct and put a considerable burden on the contractor. As described above, the odor control and air pollution control devices require huge construction costs, operation management costs, and maintenance costs, and are extremely complicated in terms of maintenance. And it is a non-productive facility, which puts a heavy burden on those installers.

[0003]

In order to solve the above-mentioned drawbacks, the present inventor has intensively studied whether or not the treatment can be performed with a simple treating agent and a simple treating method or treating apparatus. As a result, conventional adsorbents such as activated carbon adsorb most of the pollutants, but quickly reach the saturated adsorption amount,
Therefore, high cost is required for replacement of activated carbon and regeneration of used activated carbon, so that pretreatment technology has to be adopted. In addition, it has been found that the gas adsorption treatment equipment including these adsorption towers has high equipment costs, complicated operation and management, high maintenance and management costs, and furthermore, a large site is required, so that it is difficult to spread the equipment. The present inventor had previously obtained the knowledge that titanium oxide fine particles have the same adsorption performance as activated carbon, and can further promote the sterilization treatment and decomposition of organic substances in combination with ultraviolet rays. As it is difficult to handle such as separation from the gas after treatment as it is, it has not been put to practical use. The inventor of the present invention has proposed that if zeolite is electrically heated and dried in a certain temperature range, the surface becomes porous, and the surface area of the porous material becomes a carrier having characteristics equivalent to that of activated carbon over a macro-micro area. Paying attention to the fact that the carrier having immobilized thereon can retain both the properties of titanium oxide fine particles and the properties of the adsorbent, we attempted to use it as an adsorbent oxidation treatment agent. It has been found that this adsorbing and oxidizing agent is capable of adsorbing organic components more quickly, and oxidatively decomposes the adsorbed organic components more quickly when used in combination with irradiation with sunlight, ultraviolet rays or ozone lamps. Therefore, the present invention focuses on small zeolites having a diameter of 1 mm or less, which are difficult to handle and have no commercial value, among zeolites. It is another object of the present invention to irradiate ultraviolet rays in sunlight outdoors or the like, or to perform chemical oxidative decomposition treatment by natural light or artificial light by irradiation with an ultraviolet lamp or an ozone lamp.

[0004]

According to the present invention, a titanium oxide solution is added to zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10%.
This is a deodorizing, adsorption and oxidizing agent that is applied to the surface so as to be dried, fixed at room temperature and fixed. The present invention also relates to a method in which titanium oxide liquid is added to zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 2.
It is applied to the surface so as to be 10%, and the temperature is 200-
It is a deodorizing adsorption oxidizing agent sintered at 400 ° C. The present invention also provides a deodorizing adsorption oxidizing agent which is applied to a surface of a zeolite particle having a diameter of 1 mm or less in a weight ratio of 2 to 10% and dried and fixed at room temperature. Spray to the flue gas of the combustion equipment to adsorb odorous and contaminant components, collect the dry deodorized adsorbent oxidizing agent with a bag filter, and decompose these components by sunlight or ultraviolet irradiation at an outdoor disposal site This is an adsorption oxidation treatment method using a deodorizing adsorption oxidation treatment agent. The present invention also provides
A titanium oxide solution is applied to the surface of zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10%, and is sintered at a temperature of 200 to 400 ° C. The surface is scattered on the material to be treated having the components, and the odor component or the contaminant component is adsorbed. At the outdoor disposal site, the component is decomposed by sunlight or ultraviolet irradiation. is there.

[0005]

The present invention focuses on zeolite particles which are small and difficult to handle, such as zeolite particles having a diameter of 1 mm or less, and which are too small to have commercial value among zeolite. A gas component is adsorbed using an agent or the like, and ultraviolet rays in sunlight are irradiated outdoors or the like, or a chemical oxidative decomposition treatment is performed by natural light or artificial light by irradiation with an ultraviolet lamp or an ozone lamp. The present inventor has been studying to decompose and deodorize malodorous components by photocatalysis, but it is a laboratory scale using a photocatalyst such as powdered titanium oxide and a dedicated ultraviolet lamp (mainly 370 nm wavelength). Was something. The inventor of the present invention has reported that a carrier in which a zeolite fine particle having a porous surface and a large porous surface area over a macro-micro area is used as a carrier, and the titanium oxide is immobilized on the carrier, and the characteristics of the titanium oxide fine particle and the molecular sieves ( Focusing on the ability to maintain both the properties of synthetic zeolites) and using it as an adsorbent oxidizing agent, it decomposes organic substances adsorbed by the treating agent. We thought that there is a possibility of practical application of deodorization and exhaust gas component decomposition by spraying on materials and incineration ash, etc., and as a result of various tests, we found superiority in various points of treatment performance. 1) The present invention is a deodorizing adsorption oxidation treatment agent in which a titanium oxide liquid is applied to zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10% and dried and fixed at room temperature. This deodorizing adsorption oxidation treatment agent fixed at room temperature can obtain a synergistic effect without impairing the respective properties of the fine powder of titanium oxide and the zeolite powder. In other words, the advantages can be exhibited by utilizing the treatment method utilizing the characteristics of the fine powder. In addition, due to the cation exchange capacity peculiar to zeolite and the porosity formed when the water adhering to the zeolite and the water of crystallization evaporate at high temperatures, the aluminum and iron components change to aluminum oxide and iron oxide as a result. Adsorption performance can be exhibited at least as high as that of activated carbon. 2) As an exhaust gas treatment method that takes advantage of the above advantages, by spraying the adsorption oxidation treatment agent onto a high-temperature flue gas without adsorbing tower equipment, the flue gas contaminants can be efficiently adsorbed. Then, the adsorbed fine powder can be easily collected by a bag filter or the like. In addition, the adsorbed component can be decomposed by the photodecomposition performance of titanium oxide under sunlight irradiation in an outdoor disposal site or the like without diffusing the dust collection sludge into the atmosphere. 3) According to the present invention, a titanium oxide solution is sintered to a zeolite powder in advance at a temperature of 200 to 400 ° C., and a porous material formed when water adhering to the zeolite or water of crystallization evaporates. Can be changed to aluminum oxide or iron oxide to exhibit the adsorption performance of exhaust gas components at least as high as that of activated carbon. 4) By spraying the adsorbed oxidizing agent so as to cover general waste such as an outdoor disposal site or incinerated ash, etc., without discharging exhaust gas components and harmful components to the atmosphere.
Adsorbed components can be decomposed by the photodecomposition performance of titanium oxide under sunlight irradiation.

[0006]

Example 1 A room temperature dried titanium oxide-supported zeolite powder is produced by the following steps. 1) 1 liter of zeolite powder is placed evenly on an enamel pad. 2) Spray 100 ml of a sol (Jupiter manufactured by Showa Denko) containing 25% titanium oxide as a solid content while stirring the zeolite powder. 3) Dry each zeolite powder on the sun without adhering to each other.

[0007]

EXAMPLE 2 The zeolite powder supporting titanium oxide produced in Example 1 was supplied to the exhaust flue in a flue gas discharge pipe 2 connected to an incinerator 1 as shown in FIG. The dust is simultaneously collected by the bag filter 3 from the treatment gas and the titanium oxide-supported zeolite powder which is sprayed from the device 5 and adsorbs the exhaust gas contaminant. The processing gas from which the exhaust gas pollutant has been removed is discharged from the gas discharge pipe 4. The incinerated ash collected by the bag filter 3 is discharged from the collected ash discharge pipe 6 and sent to the incineration ash disposal site 7, where it is exposed to sunlight and the exhaust gas is contaminated with titanium oxide and ultraviolet rays of sunlight. Photodegrade the substance. Using the gas processing apparatus of Example 2, the exhaust gas of the livestock composting facility was processed under the following processing conditions. According to the processing results of the present invention, a high processing effect is recognized even for either a basic or acidic gas. In addition, the incineration ash odor is more stably obtained.

[0008]

Example 3 A zeolite powder supporting titanium oxide by electric heating is produced by the following steps. 1) 1 liter of zeolite powder is placed evenly on an enamel pad. 2) Spray 100 ml of a sol (Jupiter manufactured by Showa Denko) containing 25% titanium oxide as a solid content while stirring the zeolite powder. 3) By heating in an electric furnace or micro irradiation, the powdered zeolite sprayed with titanium oxide of the item 2) is heated to a temperature of 200 to 400 ° C.
For sintering.

[0009]

Embodiment 4 In the apparatus of FIG. 2, the surface of the incinerated ash when the zeolite powder supporting titanium oxide was not supplied,
The titanium oxide-supported zeolite powder produced in Example 1 was coated to a thickness of 2 cm. As a result, the odor concentration emanating from the surface is as follows. The processing apparatus of the present invention shows a high processing effect on either basic or acidic gas.

[0010]

[Effect] The exhaust gas treatment method using the deodorizing adsorptive oxidation treatment agent of the present invention is applicable to livestock-related livestock pens, composting plants, sewage treatment plant pretreatment facilities, manure treatment plant pretreatment facilities, rural village drainage facilities, etc. This is effective for gas treatment facilities at locations. In particular, the deodorizing adsorption oxidation treatment agent according to the present invention and the deodorizing adsorption oxidizing agent according to the present invention are applied to odor generating places generated at high concentration in garbage incinerators, industrial waste disposal sites, general waste disposal sites, etc. where organic chlorine-based exhaust gas and the like are generated. If the used exhaust gas treatment method is used,
It is not necessary to add new adsorption equipment to the exhaust gas treatment device.
In addition, since the adsorbent coated with the substance to be treated at the disposal site is regenerated by light, there is no need to add or replace it, and there is no need to regenerate the adsorbent. This has the effect of greatly reducing operating costs. In addition, the present invention has an excellent effect on treating harmful gases from factories such as organic components, in particular, organochlorine compounds and nitrogen oxides, and is effective as an environmental purification facility or a pollution prevention facility. This is extremely effective in reducing construction costs.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a processing flow of exhaust gas when an adsorption oxidation treatment method using a deodorizing adsorption oxidation treatment agent of the present invention is applied to a garbage incinerator.

[Explanation of symbols]

1 incinerator 2
Flue gas exhaust pipe 3 Bag filter 4
Gas discharge pipe 5 Titanium oxide supported powder zeolite supply device 6 Dust collection ash discharge pipe 7
Incineration ash disposal site

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B01D 53/86 ZAB B01J 35/02 J B01J 29/06 20/18 E 35/02 B01D 53/36 J / / B01J 20/18 ZABH F-term (Reference) 4C080 AA05 AA07 BB02 CC03 CC04 CC05 CC08 CC09 HH05 JJ04 KK06 KK08 LL02 MM02 MM04 QQ03 4D048 AA22 AB01 AB03 BA07X BA11X BA41X BB01 CB04 BA01 FA04 FA34 FA37 4G069 AA03 AA08 BA04A BA04B BA07A BA07B BA48A CA02 CA04 CA07 CA10 CA17 DA08 EA01X EA01Y EB18X FA02 FB23 FB33 FC07 FC08 ZA01A ZA01B ZA46A ZA46B ZE09

Claims (4)

[Claims] 1. A deodorizing and adsorbing oxidizing agent obtained by applying a titanium oxide solution to zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10% and drying and fixing at room temperature. 2. A deodorizing and adsorbing oxidizing agent obtained by applying a titanium oxide solution to zeolite particles having a diameter of 1 mm or less on the surface so as to have a weight ratio of 2 to 10% and subjecting it to a sintering treatment at a temperature of 200 to 400 ° C. 3. A deodorizing and adsorbing oxidizing agent which has been applied to a surface of zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10% and dried and fixed at room temperature. Spray to the flue gas of the combustion equipment to adsorb odorous and contaminant components, collect the dry deodorized adsorbent oxidizing agent with a bag filter, and decompose these components by sunlight or ultraviolet irradiation at an outdoor disposal site Oxidation treatment method using a deodorizing adsorption oxidation treatment agent. 4. A deodorizing and adsorbing oxidizing agent obtained by applying a titanium oxide solution to zeolite particles having a diameter of 1 mm or less in a weight ratio of 2 to 10% and sintering it at a temperature of 200 to 400 ° C. A deodorizing and adsorbing oxidizing agent that spreads on the surface of a substance having an odor component or a contaminant component to adsorb the odor component or the contaminant component and decomposes the component by sunlight or ultraviolet irradiation at an outdoor disposal site. Adsorption oxidation treatment method.