JP4103736B2 - Organochlorine compound decomposition accelerator and decomposition method - Google Patents

Description

  The present invention relates to a chemical for promoting thermal decomposition of organochlorine compounds such as dioxins contained in fly ash, incineration ash, molten fly ash, etc. generated in a waste incinerator, and dioxins using this chemical. The present invention relates to a method for efficiently decomposing and removing organochlorine compounds such as the above.

  Fly ash generated from waste incinerators such as general waste and industrial waste, incineration ash (also called main ash and furnace ash), and molten fly ash obtained by melting these ashes are extremely toxic. Because it contains aromatic organic chlorine compounds such as high dioxins (polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, coplanar PCBs) and other organic chlorine compounds in these ashes There is a need to. Moreover, since the surrounding soil of a waste incineration plant etc. may be contaminated by the fall of the fly ash contained in the exhaust gas discharged | emitted from a chimney, purification processing is also required about these soils.

  Incinerated fly ash and molten fly ash have a temperature of about 200 to 400 ° C. in an air atmosphere due to the action of a chlorination catalyst such as copper chloride contained therein, from residual carbon and salts contained therein. Some have a tendency to produce dioxins when heated at. Such a process of forming dioxins is called resynthesis or denovo synthesis. Thus, incinerated fly ash and molten fly ash, which can easily re-synthesize dioxins by simple heating, can be said to be dioxin contaminants that are particularly difficult to detoxify.

  On the other hand, in surrounding soils of electrical equipment manufacturing or use factories, etc., there are cases where they are contaminated with PCBs that were once used as stable insulating oil due to leakage, etc., but PCBs are also highly toxic organochlorine compounds. Therefore, it is necessary to purify these PCB-contaminated soils.

  Furthermore, aliphatic organochlorine compounds such as polychlorinated ethylenes such as trichlorethylene and tetrachloroethylene, which are used in a wide range of fields such as degreasing and dry cleaning of metal products such as precision machinery, polychlorinated phenols used in agricultural chemicals, etc. Chlorinated benzene is also highly toxic.

  Dioxins, PCBs, and the above-mentioned organochlorine compounds are toxic, chemically stable, and hardly decomposable, so there are serious problems with pollution of air, water, soil, etc. due to their discharge. . In particular, it is said that 70 to 80% of the total discharge amount of dioxins is discharged from the waste incinerator, most of which is discharged in the state contained in the fly ash. Therefore, in order to prevent the accumulation of dioxins in the environment, it is necessary to decompose and detoxify the dioxins contained in the daily waste incineration fly ash and the like.

Conventionally, various proposals have been made as techniques for decomposing and detoxifying organochlorine compounds contained in fly ash and soil. For example, the following methods are known.
(1) Method of heating fly ash directly under non-passage flow system under oxygen-deficient conditions (Japanese Patent Publication No. 6-38863)
(2) Method of adding amine compound to fly ash and heating (Patent No. 3287298, Patent No. 3287301)
(3) Method of adding phosphorous acid and / or hypophosphorous acid to fly ash and heating (Japanese Patent Laid-Open No. 11-290824)
(4) Add and mix corrosive earth, compost, powdered starch or sucrose, sodium formate or formic acid water, etc. to solid substances contaminated with aromatic halogen compounds, and heat to 300-450 ° C. Method for decomposing aromatic halogen compounds (JP-A-8-52454)
Japanese Patent Publication No. 6-38863 Japanese Patent No. 3287298 Japanese Patent No. 3287301 JP-A-11-290824 JP-A-8-52454

  However, the conventional method has the following problems.

  In the method (1), a sufficient dioxin decomposition effect cannot be obtained unless an oxygen-deficient state is established. However, in order to establish an oxygen-deficient state, the reactor is used as a closed system to prevent air contamination. In addition to the structure, a facility for supplying an inert gas such as nitrogen for replacing the intruding air inside the reactor is required, which increases the facility cost.

  The method (1) is a technique for decomposing dioxins by using some transition metal salts contained in fly ash as a catalyst, compared to the case where dioxins are pyrolyzed alone. Decomposition at low temperatures can be achieved. However, in order for the decomposition reaction of dioxins to proceed, both need to contact each other. Since both the hardly volatile dioxins and the metal salt acting as a decomposition catalyst thereof are mixed in the fly ash particles, the contact between the two is achieved only by stirring between the solids. It is difficult to achieve sufficient contact efficiency in a solid reaction. In addition, since chlorinated organic compounds such as dioxins are chemically stable, high temperature heating is required for decomposition, and some high temperature heating is required for decomposition in order to compensate for low contact efficiency. Generally, in order to sufficiently decompose dioxins in fly ash generated by incineration of waste, a reaction temperature of 400 ° C. or higher, preferably about 450 ° C., and a reaction time of about 30 minutes or longer are required. is there. On the other hand, fly ash generated by incineration of waste contains a high concentration of salts such as sodium chloride, potassium chloride, and calcium chloride. As shown in FIG. 1, in steel materials, it is known that corrosion caused by salts in fly ash is accelerated at a high temperature region of 400 ° C. or higher. For this reason, in the method (1), Maintenance costs are greatly increased due to corrosion of equipment caused by high-temperature heating in the presence of high-concentration salts.

  In addition, since alkali metal chlorides such as sodium chloride have a low melting point, the method (1) that requires high-temperature heating has caused problems such as sticking and discharge defects due to the melting of fly ash that is to be treated inside the reactor. May cause trouble. Compared to general incineration fly ash, molten fly ash generated by gasification fusion fly ash and ash melting has a higher alkali metal chloride concentration, and is more likely to cause the same trouble.

  In addition, in the method (1), dioxins are detoxified by dechlorination reaction, but if the treated ash after the reaction is discharged out of the system as it is and then slowly cooled, the dioxin inherent in fly ash is retained. Dioxins may be re-synthesized due to their ability to synthesize. For this reason, a method is generally adopted in which a cooler is provided after the reactor and the treated ash is rapidly cooled.However, the atmospheric gas inside the reactor becomes highly humid due to the effect of moisture adsorbed on the fly ash that is the raw material. Therefore, condensation of this moisture occurs inside the cooler, and here again there is a possibility of causing fly ash sticking or corrosion trouble of the device.

  The amine compound used in the method of (2) can decompose dioxins in fly ash with high efficiency under mild temperature conditions without the problem of high temperature corrosion of steel materials by chloride. Due to the chemical itself and its decomposition products, the exhaust gas and the treated ash will generate a specific odor. Moreover, generation | occurrence | production of the tar-like decomposition product is also seen. For this reason, equipment is needed to oxidize and decompose the odor components by introducing the exhaust gas from the fly ash heat treatment device to the combustion chamber of the incinerator using a duct that is kept warm to the extent that tar components can be prevented from condensing. There are limitations in terms of equipment design.

  The method (3) has problems such that the effect of decomposing dioxins at 400 ° C. or lower of the drug used is insufficient and toxic phosphine is generated as a decomposition product of the drug.

  Among the methods (4), when sodium formate is used, a promoting effect is obtained in the decomposition of dioxins in some fly ash. However, in general, a fine powder calcium-based alkaline agent is sprayed on the flue upstream of the dust collector for the purpose of removing hydrochloric acid gas contained in the exhaust gas, and the dust collection fly ash contains calcium chloride as a reaction product. In the case of sprayed fine powdered activated carbon or activated coke for the purpose of adsorbing and removing ash and gas phase dioxins, and fly ash containing activated carbon etc. in the dust collection fly ash or molten fly ash generated from an ash melting furnace In addition, it is difficult to decompose dioxins in a temperature range of 200 to 450 ° C. by adding formic acid and heat-treating, and may promote resynthesis and increase the concentration of dioxins. is there.

  Therefore, the present invention solves the above-mentioned conventional problems, and is discharged from fly ash, incineration ash, gasification molten fly ash, and ash melting furnace generated by waste incineration, which is the largest cause of dioxins emission. A decomposition accelerator for efficiently decomposing organochlorine compounds such as dioxins in a material to be treated, such as molten fly ash, without requiring high-temperature treatment and without causing resynthesis of dioxins; An object of the present invention is to provide a method for decomposing organochlorine compounds using this decomposition accelerator.

Decomposition accelerator for the organic chlorine compounds of the present invention, i Soshianuru acid, cyanuric acid, 5,5'-dimethyl hydantoin, sarcosine, and comprise one or more selected from the group consisting of sarcosine alkali metal salts Features.

  In the method for decomposing an organic chlorine compound of the present invention, the organic chlorine compound in the material to be treated is decomposed by adding the decomposition accelerator of the present invention to the material to be treated containing the organic chlorine compound and heating. It is characterized by that.

That is, the present inventors have found that there is no fear of high-temperature corrosion of steel materials due to salts, and that dioxins can be efficiently produced even in a low temperature range of 400 ° C. or lower without problems of fixation due to melting and even in an oxygen-deficient state. to find a decomposition accelerator degradable organic chlorine compounds, result of studying the numerous drugs, Lee Soshianuru acid, 5,5'-dimethyl hydantoin, promote decomposition following compounds are sarcosines of dioxins As a result, the present invention was completed .
・ Isocyanuric acid, cyanuric acid (Cyanuric acid and isocyanuric acid are in equilibrium due to keto-enol transfer and cannot be isolated. However, the equilibrium is predominantly biased toward isocyanuric acid.)
・ 5,5′-dimethylhydantoin ・ Sarcosine and sarcosine alkali metal salts

  These compounds are compounds containing nitrogen which is a hetero atom, and these have the effect of suppressing the activity of a chlorination catalyst such as copper chloride which acts as a synthesis catalyst for dioxins and promoting the dechlorination reaction. Furthermore, among these, alkali metal salts and ammonium salts have the effect of scavenging the detached chlorine, and are more effective by promoting the decomposition of dioxins.

  As shown in the examples and comparative examples described later, the heat treatment alone does not cause the problem of high-temperature corrosion of the steel material attracted by contact with salts with dioxins in the material to be treated such as fly ash. Although it cannot be sufficiently decomposed in a temperature range of 400 ° C. or less and not less than 30 minutes without causing a trouble in handling due to melting of ash, by adding the above-mentioned drug according to the present invention, A sufficient dioxin decomposition rate can be achieved by heating at a temperature of 250 to 400 ° C. mild to high temperature corrosion of steel materials by salts and by heating for a short time of less than 30 minutes. Here, the “sufficient decomposition rate” refers to a decomposition rate of 60% or more in terms of a decomposition rate based on the actually measured concentration of dioxins.

  According to the present invention, a decomposition accelerator having an active ingredient amount of about 20% by weight or less is added to and mixed with a substance to be treated such as fly ash, and heat treatment is performed at a temperature of 250 to 400 ° C. for less than 30 minutes. As a result, organochlorine compounds such as dioxins contained in substances to be treated such as fly ash can be dechlorinated and detoxified, and a decomposition rate of 60% or more can be achieved at the measured concentration.

  Since the treatment temperature can be set to 400 ° C. or lower as described above, for example, high-temperature corrosion of steel materials due to salts contained in fly ash can be prevented, and maintenance costs can be significantly reduced. Furthermore, fly ash having a low melting point due to a high salt concentration can be stably treated without causing fixation due to melting. In addition, since the processing time is a short time of less than 30 minutes, the heating device can be reduced in size and is economical.

  In addition, even if oxygen is contained in the processing atmosphere, there is little influence on the decomposition of organic chlorine compounds such as dioxins, so there is no need for the heat decomposition apparatus to have a sealed structure, and inertness for purging to prevent air intrusion Since no gas production facility is required, the facility cost can be reduced. And it is also possible to prevent condensation of moisture that is adsorbed to fly ash and the like by circulating air in the heating device.

  Of course, since the decomposition accelerator of the present invention works effectively even in an oxygen-deficient atmosphere, the reaction temperature can be lowered to 400 ° C. or lower, and a sufficient decomposition rate can be obtained under conditions of a reaction time of less than 30 minutes.

  Furthermore, since the decomposition accelerator of the present invention has a poisoning action of the dioxin-forming catalyst, there is no risk of re-synthesis of dioxins without quenching the treated product, and handling of the treated product is easy. is there.

  Embodiments of the organochlorine compound decomposition accelerator and decomposition method of the present invention will be described in detail below.

  In the following description, the present invention will be described mainly by taking fly ash containing dioxins discharged from a waste incineration facility as a substance to be treated, but the present invention is discharged from a waste incineration facility. Incinerated ash, molten fly ash containing dioxins generated by the ash melting process, soil contaminated with organic chlorine compound-containing substances such as ash, lake and river bottom sediment, incinerator demolition residue, insulating oil, etc. PCBs used, polychlorinated ethylenes used as cleaning agents, polychlorinated phenols used in agricultural chemicals, organochlorine compounds such as polychlorinated benzene, or soil and waste contaminated with these organochlorine compounds It can be effectively applied to the detoxification treatment of organochlorine compounds contained in solid materials to be treated.

Decomposition accelerator for the organic chlorine compounds of the present invention, i Soshianuru acid, cyanuric acid, 5,5'-dimethyl hydantoin, sarcosine, and the one or the active ingredient of two or more selected from sarcosine alkali metal salts group consisting Is included.

Here, the support Turkey thin alkali metal salts, sodium sarcosine are preferable.

  There is no particular limitation on the amount of the decomposition accelerator of the present invention added to the material to be treated such as fly ash, but the amount of the active ingredient is usually 20% by weight or less, particularly 15% by weight or less based on the material to be treated. preferable. Even if the addition amount exceeds 20% by weight, there is no problem in the decomposition of the organic chlorine compounds such as dioxins, but the cost of the medicine is high, which is not economically preferable. The lower limit of the addition amount of the decomposition accelerator is appropriately determined according to the amount of the organic chlorine compound in the substance to be treated so that a sufficient decomposition rate can be obtained. The amount is 1% by weight or more, particularly 2% by weight or more. In particular, fly ash exhibits different properties depending on the quality of waste during incineration and incineration conditions, and the decomposability of dioxins also differs. Therefore, in order to determine the optimum drug addition amount, it is preferable to determine the optimum addition amount in advance by a preliminary test using a small amount of fly ash.

  By the way, when the decomposition accelerator for organochlorine compounds of the present invention is stored in a storage tank, it may be solidified due to moisture in the air. When such solidification occurs, it may be difficult to take it out of the storage tank and supply it to a thermal decomposition apparatus or the like. Therefore, when there is a concern about such a problem of solidification, an anti-caking agent may be mixed with the organic chlorine compound decomposition accelerator of the present invention as necessary in order to prevent this. In this case, as the solidification inhibitor, moisture is preferentially adsorbed and effective in preventing solidification due to moisture adsorption of the decomposition accelerator of the present invention, and does not inhibit the decomposition promotion effect of the organic chlorine compound. Any substance may be used. For example, one or more of zeolite, porous silica, porous alumina, diatomaceous earth, pearlite, calcium carbonate, slaked lime, quicklime, sodium carbonate, sodium hydrogencarbonate, and the like can be used.

  The mixing ratio of the anti-caking agent is not particularly limited, but when mixing at the inlet of the thermal decomposition apparatus, the mixing rate of the anti-caking agent with respect to the active ingredient of the decomposition accelerator of the present invention is It is preferably 1 to 30% by weight, particularly 1 to 20% by weight, especially 1 to 10% by weight. The increase in the mixing ratio of the anti-caking agent and the anti-caking effect due to moisture are not in a first-order proportional relationship. If the mixing ratio exceeds a certain level, the improvement in the anti-caking effect reaches equilibrium. From such a viewpoint, a mixing ratio exceeding 30% by weight is not preferable. In addition, while the greatest advantage of incineration as a waste treatment technique is volume reduction, for example, mixing unnecessary chemicals with fly ash is not preferable from the viewpoint of volume reduction of waste.

  In the present invention, the decomposition accelerator of the present invention is added to a substance to be treated such as fly ash and heated. If the heating temperature is excessively high, problems such as high-temperature corrosion of the steel material and fixation due to melting of the material to be treated occur as described above. For this reason, it is preferable that this heating temperature is 400 degrees C or less, and it is especially preferable that it is 380 degrees C or less. That is, the decomposition accelerator of the present invention can achieve a sufficient organic chlorine compound decomposition rate even at such a relatively low heating temperature. In addition, since a sufficient organochlorine compound decomposition rate cannot be achieved when the heating temperature is excessively low, it is preferably 250 ° C. or higher, particularly 270 ° C. or higher.

  Although there is no restriction | limiting in particular in a heating time, It is unpreferable from the surface of heating cost and processing efficiency to perform heating for an excessive long time. On the other hand, according to the decomposition accelerator of the present invention, since a sufficient organochlorine compound decomposition rate can be achieved in a short time of less than 30 minutes, the heating time is less than 30 minutes, particularly 25 minutes or less. Is preferred. The lower limit of the heating time varies depending on the properties of the substance to be treated, the heating temperature, the type of chemical used and the amount added, but is usually 3 minutes or longer, preferably 5 minutes or longer.

  There are no particular limitations on the heating apparatus used, for example, continuous indirect heating kiln type reactor, fluidized bed type reactor, vertical multistage furnace type reactor, autoclave, batch type fluidized bed type reactor, fluidized bed, etc. It is possible to use a batch type indirect heating reactor.

  As described above, since the decomposition accelerator of the present invention acts as a poisoning component with respect to copper chloride or the like, which is a production catalyst for dioxins, the dechlorination reaction proceeds efficiently even in an oxygen atmosphere. Even in an atmosphere where there is, a sufficient decomposition effect of the organic chlorine compound is exhibited. For this reason, it is not necessary to provide the heating device with a special mechanism such as maintaining airtightness and preventing air from entering. Rather, air is circulated through the heating device in order to prevent moisture that is adsorbed by the material to be treated such as fly ash and brought into the heating device from condensing at the temperature-decreasing portion due to partial cooling inside the heating device. It is possible to preferably carry out air replacement in the heating device. In this way, it is preferable to prevent moisture condensation in order to prevent corrosion of the apparatus and avoid problems such as reaction inhibition and discharge inhibition due to solidification of the material to be treated such as fly ash.

  There is no restriction | limiting in particular in the method of adding the decomposition accelerator of this invention to to-be-processed substances, such as fly ash, The method of adding within transfer lines, such as a storage tank of the front | former stage of a heating apparatus, or a conveyor, is employable. In order to obtain a stable decomposition rate of organic chlorine compounds such as dioxins, it is necessary not only to add the decomposition accelerator of the present invention, but also to sufficiently mix the substance to be treated such as fly ash and the decomposition accelerator. preferable. Therefore, for example, when adding the decomposition accelerator of the present invention to the primary storage tank at the fly ash heating device inlet, mixing using a mechanical stirrer or introducing gas into the storage tank itself to form a fluidized bed A method such as mixing them is effective. Moreover, a screw conveyor, a screw feeder, etc. can be utilized as a method of mixing the decomposition accelerator of this invention in transfer processes, such as a conveyor. These can stably mix the material to be treated such as fly ash and the decomposition accelerator of the present invention, and are suitable for the present invention.

  The decomposition accelerator of the present invention can also be used by spraying on an exhaust gas flue of an incineration facility. That is, by spraying the decomposition accelerator of the present invention on the flue gas flue of the incineration facility, the fly ash collected by the dust collector uniformly contains the decomposition accelerator of the present invention. Therefore, dioxins can be decomposed by introducing the collected fly ash as it is into a heating device and heating it, and a drug supply device and a stirrer are separately provided in a storage tank and a measuring tank provided at the inlet of the heating device. There is no need to provide it, and this is particularly effective when the decomposition accelerator of the present invention is applied to an existing heating apparatus. Moreover, in this embodiment, a decomposition reaction advances preliminarily between spraying-dust collection, and is effective.

  By the way, in a waste incinerator, hydrochloric acid gas is contained in the incineration exhaust gas, and as a method for removing this, a method of spraying a fine powder alkali agent such as slaked lime or sodium hydrogen carbonate onto the flue is generally adopted. ing. In some cases, a method of spraying fine powdery activated carbon or activated coke on the flue is used for the purpose of adsorbing and removing dioxins in the exhaust gas. In such an installation, the decomposition accelerator of the present invention can be sprayed onto the flue together with a fine powdery alkali agent, activated carbon or activated coke.

  When spraying the decomposition accelerator of the present invention onto a flue, it is mixed beforehand with an alkaline agent for removing hydrochloric acid contained in the exhaust gas, finely powdered activated carbon or activated coke for adsorbing and removing dioxins in the gas phase. It is effective to use as This is because an alkali agent for absorbing hydrochloric acid, activated carbon for gas phase dioxin adsorption or activated coke also acts as a solidification inhibitor of the decomposition accelerator of the present invention. In this case, the addition amount of the decomposition accelerator of the present invention is determined according to the amount of fly ash collected, and mixed with an alkali agent or activated carbon or activated coke spray amount suitable for hydrochloric acid gas concentration or dioxin concentration. In this case, the mixing ratio of the alkali agent or activated carbon or activated coke as the anti-caking agent will exceed the preferred mixing ratio of the above-mentioned anti-caking agent. Alkaline agent, activated carbon or activated coke used in the method of spraying on the road and discharged together with fly ash can be used as a solidification inhibitor of the decomposition accelerator of the present invention, resulting in excessive fly ash increase. This is preferable.

  Of course, it is also possible to spray the decomposition accelerator of the present invention on the air transport line from a separate storage tank from the activated carbon or activated coke for adsorption and removal of hydrochloric acid gas absorption and gas phase dioxins onto the flue. Is possible. In this case, when there is a concern about the fixation of the decomposition accelerator due to moisture, it is preferable to mix the anti-sticking agent in advance as described above.

  As described above, since the decomposition accelerator of the present invention can prevent re-synthesis of dioxins, a treatment obtained by adding a decomposition accelerator and subjecting the organic chlorine compound to decomposition by heating according to the present invention. Even if the product is not rapidly cooled, the organic chlorine compound concentration does not increase. For this reason, additional equipment, such as a rapid cooling device, is not required after the heating device.

  The treated product thus treated has a greatly reduced concentration of organochlorine compounds such as dioxins and can be safely disposed of by landfill treatment or reused.

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.

In the following examples and comparative examples, the following raw material fly ash or highly re-synthesized fly ash was used as the material to be treated containing dioxins.
1) Raw fly ash Neutral fly ash collected from a stoker furnace type municipal waste incinerator (wet acid gas treatment) operated continuously for 24 hours was used as raw fly ash. The fly ash does not contain activated carbon or alkaline agent.

  Table 1 shows the main component composition and dioxin concentration of the raw fly ash.

2) Highly recombined fly ash Calcium chloride corresponding to the reaction product when calcium-based alkaline agent is used as a desalting agent is added to the raw fly ash of 1) above to make the chlorine concentration 28% by weight (fine powder) Chlorine concentration actually confirmed in fly ash subjected to dry gas treatment by alkali agent spraying, which was set as a concentration corresponding to a high concentration). Furthermore, 5% by weight of activated carbon was added to the fly ash to prepare highly re-synthesized fly ash. The concentration of dioxins in this highly re-synthesized fly ash was 460 ng / g.

  Further, the heating reactors used in the following examples and comparative examples are open to the air and are not purged with an inert gas such as nitrogen gas. Therefore, the reaction field is basically an air atmosphere.

Examples 1 to 4 and Comparative Example 1
Add 5% by weight of the chemicals shown in Table 2 to the raw fly ash (no chemical added in Comparative Example 1), heat-treat at 350 ° C. for 10 minutes, and dioxin concentration and dioxin decomposition of the resulting treated ash The rates were examined and the results are shown in Table 2. In Table 2, the dioxin concentration of untreated raw material fly ash is also shown.

As is apparent from Table 2, when the raw fly ash was heat-treated without adding a chemical, the dioxins concentration of the treated ash showed a decomposition tendency of 352 ng / g, but the decomposition rate was insufficient at 52%. Met. In contrast, Lee Soshianuru acid, 5,5'-dimethyl hydantoin, when added sarcosine, or sarcosine sodium, 90% of the decomposition rate is obtained, dioxins these drugs neutral fly ash It can be seen that it is effective in promoting decomposition.

Examples 5 to 8 and Comparative Example 2
5% by weight of the chemicals shown in Table 3 is added to the highly re-synthesized fly ash (however, no chemical is added in Comparative Example 2), heat-treated at 350 ° C. for 10 minutes, and the dioxins concentration and dioxin of the resulting treated ash The decomposition rate was examined and the results are shown in Table 3. In Table 3, the dioxin concentration of untreated highly re-synthesized fly ash is also shown.

As is clear from Table 3, when heat treatment was performed without adding a chemical to highly recombined fly ash, the dioxins concentration of the treated ash was 1200 ng / g, and a large amount of dioxins were re-synthesized. In contrast, Lee Soshianuru acid, 5,5'-dimethyl hydantoin, sarcosine, or sarcosine when Shin sodium was added, the 65% or more of the decomposition rate is obtained, with respect to these drugs high resynthesis Fly Ash Thus, it can be seen that it is effective in preventing the resynthesis of dioxins and promoting the decomposition of dioxins.

It is a graph which shows the relationship between the surface temperature and corrosion rate of the steel materials in a garbage incinerator.

Claims (11)

Lee Soshianuru acid, cyanuric acid, 5,5'-dimethyl hydantoin, sarcosine, and decomposition accelerator for the organic chlorine compounds, which comprises one or more selected from the group consisting of sarcosine alkali metal salts.   2. The organic chlorine according to claim 1, wherein the organic chlorine is an agent for promoting decomposition of the organic chlorine compound in the material to be treated by heating by adding to the solid material to be treated containing the organic chlorine compound. Compound decomposition accelerator.   In Claim 2, the to-be-processed substance is the fly ash and incineration ash generated by incineration of waste, the gasification melted fly ash generated in the gasification melting facility, and the melting generated by the melting process of the fly ash or incineration ash An organic chlorine compound decomposition accelerator characterized by being selected from the group consisting of fly ash.   A decomposition accelerator according to any one of claims 1 to 3 is added to a substance to be treated containing an organic chlorine compound and heated to decompose the organic chlorine compound in the substance to be treated. To decompose organic chlorine compounds.   5. The method for decomposing an organic chlorine compound according to claim 4, wherein the substance to be treated is a solid.   5. The method for decomposing organochlorine compounds contained in fly ash collected by a dust collector of a waste incineration facility, wherein the decomposition accelerator is sprayed on an exhaust gas flue of an incinerator, and the dust collector A method for decomposing an organic chlorine compound, comprising collecting fly ash together with a decomposition accelerator and heating the fly ash containing the collected decomposition accelerator.   The organic substance according to claim 6, wherein the decomposition accelerator is sprayed on the flue together with an alkali agent for absorbing hydrochloric acid gas and / or activated carbon or activated coke for adsorbing and removing dioxins in the gas phase. A method for decomposing chlorine compounds.   The method for decomposing an organic chlorine compound according to any one of claims 4 to 7, wherein the heating temperature is 250 to 400 ° C.   The method for decomposing an organic chlorine compound according to any one of claims 4 to 8, wherein the amount of the decomposition accelerator added to the substance to be treated is 1 to 20% by weight.   The method for decomposing an organic chlorine compound according to any one of claims 4 to 9, wherein the heating time is 3 minutes or more and less than 30 minutes.   The continuous indirect heating kiln type reactor, fluidized bed type reactor, vertical multistage furnace type reactor, autoclave, batch type fluidized bed type reactor, or batch type indirect according to any one of claims 4 to 10. A method for decomposing an organochlorine compound, characterized by heating with a heating reactor.

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