JP2000042360A - Blowing agent for flue and its use method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely fix heavy metals or harmful substances in fly ash, to neutralize a waste gas, and to suppress the elusion of the metals or harmful substances by uniformly mixing the specified amt. of calcium hydroxide and aluminum respectively and making the obtd. mixture as an essential component. SOLUTION: In this blowing agent for a flue, a part of a Ca(OH)2 is consumed by neutralization of a waste gas and the remaining is trapped as the structural component of an active composite body by the effect of Al(OH)3 coexisting. Thereby, not only the waste gas is neutralized but the trapped fly ash is also neutralized and heavy metals and harmful substances in the ash are trapped and fixed by the active composite body. Namely, the trapped fly ash hardly causes the elusion of the heavy metals. Therefor, the mixing amt. of the Al compd. in the mixture is set to 6.9 to 15.6 pts.wt. expressed in terms of Al to 100 pts.wt. of Ca(OH)2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flue gas blowing agent and a method of using the same, and more particularly, it can neutralize exhaust gas from an incinerator and, in addition to heavy metals and harmful substances contained in fly ash. By firmly fixing substances etc., it is possible to effectively suppress the re-elution of the fly ash after treatment, and at the same time, only by kneading the fly ash after treatment with water, the solidification strength of the solidified material can be used with cement The present invention relates to a flue blowing agent capable of increasing the solidification strength to the same level as when it was heated, and a method for using the same.

[0002]

2. Description of the Related Art A normal waste incineration plant has an incinerator temperature of 750 to 1000 ° C., an exhaust gas amount of 5000 to 9000 Nm ³ per ton of trash, and an O ₂ concentration of 10 tons.
It is operated under the condition of 〜14% by volume. In a refuse incineration plant under such operating conditions, plastics such as PVC are contained in garbage, for example, 10 to 40.
When the weight% is mixed, the HCl gas concentration in the exhaust gas is generally about 700 to 1200 ppm. Also, since the S component in the garbage and fuel oil is converted to SOx,
The exhaust gas from the incinerator is acidic.

[0003] Therefore, C which is usually a strong alkali
A predetermined amount of a (OH) ₂ powder is blown into a flue to neutralize the exhaust gas. In that case, Ca (OH) required for neutralization of exhaust gas under the above operating conditions
The quantity of ₂ is approximately 4 kg per ton of garbage. However, considering the voluntary emission control regulations and safety of each incinerator, the amount of Ca (OH) ₂ blown into the flue is set in the range of 4 to 12 kg per ton of garbage. It is customary.

On the other hand, during incineration of refuse, a large amount of fly ash is generated in addition to the exhaust gas containing the acidic gas component, and passes through the flue together with the exhaust gas. And in this fly ash, P
It contains harmful substances such as heavy metals represented by b, Cd and Hg and dioxins. For example, in the case of dioxins whose removal measures have been strengthened recently,
At present, about 80% of the generated amount is contained in the fly ash.

[0005] The fly ash passes through a flue connecting the process from the incinerator to the dust collector, is collected by the dust collector, and thereafter, is subjected to the processing described later and discarded. In that case, the exhaust gas is Ca (OH) blown into the flue.
Receive neutralization treatment by ₂ . Fly ash is unreacted Ca
It contains a large amount of (OH) ₂ and is collected in a dust collector in a highly alkaline state.

[0006] The highly alkaline fly ash collected by the dust collector is conveyed to a kneader where a heavy metal fixing agent such as a chelating agent and a neutralizing agent such as an acid sulfate are added. Then, by kneading with water, the contained heavy metals are fixed with a chelating agent and processed so as not to elute. The treated material is dried and solidified, and then discarded, for example, in a landfill. At the time of kneading, cement may be kneaded at the same time to increase the solidification strength of the solidified material, and a measure may be taken to prevent the solidified material from self-destructing and powdering at the time of landfill.

Recently, a treatment agent containing Ca (OH) ₂ and a fixing agent for heavy metals is directly blown into exhaust gas containing fly ash to neutralize the exhaust gas and fix heavy metals in the fly ash. At the same time, the development of a processing agent for realizing it is being promoted. As such a treating agent, for example, a treating agent mainly composed of Ca (OH) ₂ functioning as a neutralizing agent and porous aluminum silicate or porous silicon dioxide functioning as a fixing agent for heavy metals (Japanese Patent Application Laid-open No. 9-99236), porous Ca (OH) ₂ , cements,
A mixture with an inorganic adsorbent, a chelating agent, water glass and the like (see JP-A-9-99234) has been proposed.

[0008]

By the way, in the case of the above-mentioned conventional treating agent, although it is useful for the neutralization treatment of exhaust gas, it can be said that it can surely fix heavy metals and the like in fly ash. Instead, heavy metals and the like may be eluted from the fly ash after the treatment. The present invention can solve the above-described problems in the conventional treatment agent blown into the flue, and not only neutralizes the exhaust gas, but also securely fixes heavy metals and harmful substances in fly ash. A flue blowing agent and its use that can suppress dissolution and can also exhibit the solidification strength of a solidified product similar to that of conventional cement by simply kneading the treated fly ash with water The purpose is to provide a method.

[0009]

Means for Solving the Problems The present inventor paid attention to the following facts in the research and development of a flue blowing agent for realizing the above-mentioned object and made further studies. (1) First, the elution amount of heavy metals in fly ash into water
We focused on the well-known fact that it depends heavily on the value. That is, for example, in the case of Pb contained in fly ash, even if the fly ash is the same, when the pH value of the fly ash environment exceeds 9.5, the elution amount increases as the pH value increases. When the pH value becomes lower than 9.5, the elution amount also increases as the pH value becomes lower.
It is a fact that the elution amount of Pb is stabilized at a low level when the value is 7.5 to 11.5.

Therefore, it is considered that a treatment agent capable of adjusting the pH value of the fly ash after the treatment to the above-mentioned range can suppress the elution of heavy metals in the fly ash. (2) In addition, the fly ash treatment agent must contain a strong alkali because it is an essential requirement that a neutralization treatment of exhaust gas can be achieved at the same time. The most widely used Ca (OH) ₂ is considered to be the most suitable.

On the other hand, the outlet temperature of the refuse incinerator is about 800 ° C., the temperature near the dust collector is about 150 ° C. to 300 ° C., and the temperature of the flue connecting between them is generally 150 ° C.
It is about 800 ° C. Therefore, the flue is considered to be a certain type of active reaction zone.If components activated in the above temperature range coexist here, the flue becomes active in a state containing fly ash. It is considered that a complex is formed, which can effectively fix heavy metals and the like in fly ash.

Based on the above ideas and considerations, the present inventor has conducted intensive studies. As a result, the present inventor examined various materials for components coexisting with Ca (OH) ₂ in the flue. _They have found that they are suitable as a coexisting component with Ca (OH) _2, and have developed the flue blowing agent of the present invention and a method of using the same. In other words, the fly ash treating agent of the present invention has as an essential component a mixture obtained by uniformly mixing 6.9 to 15.6 parts by weight of an aluminum compound in terms of aluminum with respect to 100 parts by weight of calcium hydroxide. It is characterized by.

In this case, the aluminum compound includes
Aluminum hydroxide, aluminum chloride, polyaluminum chloride, aluminum phosphate, aluminum nitrate, aluminum acetate, aluminum sulfate, feldspar, kaolin,
It is preferable to use one or more of clay minerals (aluminum silicate compounds) represented by montmorillonite. In particular, any one of aluminum hydroxide or aluminum chloride, or a mixture of both is preferable. As these aluminum compounds, those containing an amorphous component are suitable.

In particular, aluminum hydroxide is used as an aluminum compound in an amount of 2 parts per 100 parts by weight of calcium hydroxide.
0 to 45 parts by weight (6.9 to 15.6 parts by weight in terms of Al) is used, and the aluminum hydroxide contains 70% by weight or more of amorphous aluminum hydroxide. The mixture is further provided with at least one selected from the group consisting of potassium-containing substances, gypsum, aluminates, sulfates, and silicate compounds in an amount of 2 to 100 parts by weight of the calcium hydroxide. A flue blowing agent is provided which is uniformly mixed at 20 parts by weight.

Further, in the present invention, the flue blowing agent is supplied to a temperature place of 150 ° C. or more in a flue from an incinerator to a dust collector to treat fly ash and exhaust gas passing through the temperature place. The method of using a flue blowing agent, or separately at a temperature of 150 ° C. or more in the flue from the incinerator to the dust collector, so that the components of the above-described flue blowing agent are separately obtained. There is provided a method of using a flue blowing agent, which comprises treating fly ash and exhaust gas that are supplied and pass through the temperature location.

[0016]

First, the flue blowing agent of the present invention will be described in detail. This flue blowing agent is Ca (OH)
_A mixture obtained by uniformly mixing ₂ and an Al compound is an essential component. Here, Ca (OH) ₂ is a basic component consumed for neutralizing the exhaust gas and fly ash contained therein.

As will be described later, this Ca (OH) ₂
l Adsorb heavy metals etc. in fly ash together with compound
Since an active complex that can be captured and fixed is formed, from the viewpoint of effectively fixing heavy metals and the like in fly ash, the larger its specific surface area is, the better. Specifically, a Ca having a BET specific surface area of 15 m ² / g or more is used.
(OH) ₂ is preferred.

Ca (OH) in the mixture_TwoCoexisting component with
Al (OH)_Three, AlCl_Three,
poly-AlCl_Three, AlPO_Four, Al (NO_Three)_Three, Al
(CH _ThreeCOO)_Three, Al_Two(SO_Four)_Three, Feldspar, kaolin, mo
Clay minerals such as mormorillonite
Can be. Each of these may be used alone, or two
Or more may be used in appropriate combination. These
And Al (OH)_ThreeAnd AlCl_ThreeIs preferred.

This Al compound is considered to exhibit the following effects and effects.
(OH) ₃ will be described as an example. First, this Al (OH) ₃ receives heat of exhaust gas and is converted into activated alumina. This activated alumina contains residual Ca (OH) after being consumed for neutralization.
Such as SiO ₂ component generated by the incineration of a _{two-component} or dust and compositely they react to form an active complex. The active complex fixes heavy metals and harmful substances in fly ash at the active point. In this case, for example, 4CaO.Al ₂
O ₃ .MeO.nH ₂ O, 3CaO.Al ₂ O ₃ .MeSO
It is presumed that the composition is fixed as ₄ · mH ₂ O (Me is a heavy metal), monosulfate hydrate, Ca-Si hydrate (CSH) or the like.

Al (OH) ₃ having such a function is more amorphous than that of crystalline Al (OH) _3.
H) ₃ is preferred. The latter is more active,
This is because it is easily converted to activated alumina. However, both may be used as a mixture, in which case Al (OH) ₃
In order to effectively exhibit the above-mentioned function, the amorphous A
The mixing amount of l (OH) ₃ is preferably at least 70% by weight.

In the flue blowing agent of the present invention, Ca (OH) ₂
Is consumed in the exhaust gas neutralization treatment, and the remainder is taken in as a component of the active complex by the above-described action of the coexisting Al (OH) ₃ . As a result, not only the neutralization treatment of the exhaust gas is achieved, but also the collected fly ash is neutralized, and at the same time, heavy metals and harmful substances in the collected fly ash are captured by the active complex. It is in a fixed state. That is, the collected fly ash is in a state where elution of heavy metals and the like is difficult to occur.

When the Al compound is AlCl ₃ , the AlCl ₃ reacts with the moisture in the exhaust gas in the flue to generate activated alumina and hydrogen chloride. The activated alumina thus produced exhibits the same behavior as described above to form an active complex, and the complex fixes heavy metals and harmful substances in fly ash. In order for the flue blowing agent of the present invention to exert such an effect, the absolute amount of Ca (OH) ₂ in the mixture is firstly set in order to reduce the exhaust gas to be treated to a predetermined HCl concentration. Set as required amount.

Further, the mixing amount of the Al compound in the mixture is set in the range of 6.9 to 15.6 parts by weight in terms of Al with respect to 100 parts by weight of Ca (OH) ₂ . When a plurality of types of mixtures are used as Al compounds, the amount of Al in the entire mixture is set to fall within the above range. The mixing ratio of the Al compound is Ca (OH)
₂ If the amount is less than 6.9 parts by weight (amount in terms of Al) with respect to 100 parts by weight, the amount of the active complex described above is reduced with the flue blowing agent, and heavy metals and harmful substances in fly ash are reduced. The ability to capture and immobilize water is reduced, and the effect of suppressing the elution or outflow of heavy metals and harmful substances in the fly ash after the treatment is reduced. The mixing ratio of the Al compound is 15.6.
When the amount is larger than the weight part (amount in terms of Al), the amount of fly ash collected by the dust collector is increased, and further, the relative amount of Ca in the collected fly ash is reduced, The solidification strength of the solidified material when the fly ash is kneaded with water tends to decrease.

If the mixing ratio of the Al compound is out of the above range, the effect of immobilizing heavy metals and harmful substances on the fly ash after the treatment is eventually reduced. The preferred mixing ratio of the Al compound is 7.1 to 100 parts by weight of Ca (OH) _2.
15.5 parts by weight (in terms of Al), more preferably Ca (O
H) It is 8.1 to 13.5 parts by weight (amount in terms of Al) per 100 parts by weight of ₂ ).

For example, when Al (OH) ₃ is used alone as an Al compound, the mixing ratio in the mixture is Ca
₂₀ to 45 parts by weight, preferably 20.7 to 44.6 parts by weight, more preferably 23.3 parts by weight, per 100 parts by weight of (OH) ₂
The amount may be up to 39.0 parts by weight. When AlCl ₃ is used alone, the mixing ratio in the mixture is Ca (O
H) ₂ 100 parts by weight of 34 to 77 parts by weight, preferably 35 to 76.5 parts by weight, more preferably 40 to 66.6 parts by weight.

The above-mentioned treating agent of the present invention can be obtained by simply kneading the fly ash treated with the treating agent with water.
Due to the self-hardening effect of (OH) ₂ , a solidified product having a certain level of solidification strength can be obtained. However, in addition to the above-mentioned components, further, a potassium-containing substance, gypsum,
When one or more of aluminates, sulfates, and silicate compounds are used in combination, the solidification strength of the solidified material when the treated fly ash is kneaded with water is further increased, and cement is used. It is preferable because the solidification strength is equal to that of the solidified material. This is because, even if the solidified material is disposed of in a landfill, it is possible to prevent a situation in which the solidified material is destroyed by its own weight and harmful substances or the like taken in by the rainwater flow out.

Particularly in the case of a flue blowing agent mixed with a potassium-containing substance, the solidification strength of fly ash is increased, and at the same time, the above-mentioned active complex is easily formed by the action of K having a large ionization tendency, and heavy metals are also formed. This is preferable because the effect of immobilizing species and harmful substances is also improved. As such a potassium-containing substance, for example, alunite (K ₂ (Al (OH) ₂ ) ₆ (SO ₄ )
_4), Abushitaito _{((K · Na) 2 SO} 4), alum _{(K 2 SO 4 · Al 2} (SO 4) 3 · 24H 2 O), syngenite _{(K 2 SO 4 · CaSO 4} · H 2 O) , Kurujaito _{(K 2 SO 4 · MgSO 4} · 4CaSO 4 · 24H 2 O),
Lithium mica (K.Li ₂ .Al.Si ₄ O ₁₀ (H ₂ O) ₂ ),
Chinwald mica (H ₂ · K ₄ · Li ₄ · Fe ₃ · Al ₈ · F ₈
• Natural minerals such as Si ₁₄ O ₂ ; potassium sulfate (K ₂ S)
O ₄ ); potassium-containing alumina silicate; and the like. These may be used alone or in combination of two or more.

As the aluminate, for example, sodium aluminate, for example, aluminum sulfate or calcium sulfate as the sulfate, and, for example, water glass, as the silicate compound, are preferable. In particular, when aluminum sulfate is used as the sulfate, the aluminum sulfate is Ca (O
H) ₂ functions as a neutralizing agent and at the same time, it is a thermally stable compound, so that under a flue temperature environment of 150 to 800 ° C., a part thereof is the same as Al (OH) _3. Although an aluminum-calcium active complex as described above is formed, most of the aluminum as calcium sulfate is mixed into fly ash.

Then, during the above-mentioned kneading process of the fly ash, the mixed aluminum sulfate reacts with Ca (OH) ₂ to form gypsum, which contributes to the improvement of the solidification strength of the solidified product.
These components are used in an amount of _{2 to} 100 parts by weight of Ca (OH) 2.
Preferably, 20 parts by weight are mixed. When the mixing amount is less than 2 parts by weight, the solidification strength of the fly ash after the treatment is not so high as compared with the case where no mixing is performed, and when the mixing amount is more than 20 parts by weight, the relative amounts of Ca (OH) ₂ and the Al compound are increased. This is because the effect of immobilizing heavy metals and harmful substances on fly ash becomes difficult due to a decrease in the amount of ash.

The flue blowing agent of the present invention can be prepared by mixing powders of the above-mentioned components at the above-mentioned ratios. In that case, the size of Ca (OH) ₂ or Al compound is
500 μm or less in average particle size, preferably 3 to 300 μm
It is preferred that This is because the reaction area with the fly ash becomes large, the effect of capturing and fixing heavy metals and the like becomes large, and the size is such that it can be reliably collected by an ordinary dust collector.

Next, the method of using the flue blowing agent of the present invention will be described. This flue blowing agent is used at 150 ° C during the process from the incinerator of the refuse incinerator facility to the dust collector.
It is necessary to be mixed with fly ash and exhaust gas which are blown into the above-mentioned temperature location, specifically, the flue and pass therethrough. At a place where the temperature is lower than 150 ° C., the effect of the above-mentioned Al compound is not effectively exerted, and as a result, the pH value of the fly ash after the treatment does not decrease, and heavy metals and harmful substances are fixed to the fly ash. This is because the conversion effect hardly appears.

In the blowing, the flue blowing agent may be used in the form of a powder, or may be used, for example, in a state of being dispersed in water. Further, each component constituting the flue blowing agent of the present invention may be separately blown at the blowing point in such an amount that the above mixing ratio is obtained. The fly ash thus treated is collected by a dust collector. And
For example, they are conveyed to ordinary kneaders such as paddle mixers, twin-screw kneaders, bread granulators, Henschel mixers, bipromixers, etc., where they are only kneaded with water. And is processed into a solidified product having an appropriate solidification strength.

Therefore, when this flue blowing agent is used, the fly ash after the treatment is solidified with an appropriate solidification strength using the existing equipment such as a humidifier without any new capital investment. You can make things. From the above, the present invention is very effective for measures to prevent outflow of dioxins adhering to fly ash due to rainwater or the like, and to prevent elution of heavy metals at the same time in a final disposal site. .

[0034]

EXAMPLES (1) Preparation of flue blowing agent Ca (O) having a BET specific surface area of 40 m ² / g and an average particle size of 4 μm
H) ₂ powder per 100 parts by weight, 33.3 parts by weight of amorphous Al (OH) ₃ powder having an average particle diameter of 60 μm (1 in terms of Al).
(1.5 parts by weight) to obtain a flue blowing agent. This is referred to as Example 1.

BET specific surface area 40 m ² / g, average particle size 4
33.3 parts by weight of amorphous Al (OH) ₃ powder having an average particle diameter of 60 μm per 100 parts by weight of Ca (OH) ₂ powder of μm
(Converted amount: 11.5 parts by weight), 7.4 parts by weight of potassium alum powder having an average particle diameter of 20 μm, and 7.4 parts by weight of Syrian mica powder having an average particle diameter of 25 μm were uniformly mixed to obtain a flue blowing agent. Prepared. This is Example 2.

BET specific surface area 40 m ² / g, average particle size 4
51.1 parts by weight of amorphous Al (OH) ₃ powder having an average particle diameter of 120 μm per 100 parts by weight of Ca (OH) ₂ powder of 5 μm (A
A flue blowing agent was prepared by uniformly mixing 12 parts by weight of a syngenite powder having an average particle size of 45 μm. This is referred to as a third embodiment. Ca (OH) ₂ powder 10 having a BET specific surface area of 40 m ² / g and an average particle size of 4 μm
0 parts by weight of amorphous Al ₂ (SO
₄ ) 65.5 parts by weight of the _three powders (10.3 parts by weight in terms of Al) were uniformly mixed to prepare a flue blowing agent. This is Example 4.

For comparison, a BET specific surface area of 15 m ² /
g, special grade slaked lime having an average particle size of 7 μm was prepared. This is referred to as Comparative Example 1. (2) Performance evaluation of each flue blowing agent Municipal waste was incinerated using a stoker type incinerator with a processing capacity of 2.5 ton / hr, and fly ash was collected by an electric dust collector. The operation of the furnace was performed in such a manner that the fire was turned on in the morning and the fire was turned off in the evening. The temperature of the flue was 240-265 ° C., and the flow rate of the exhaust gas passing therethrough was 17,500 Nm ³ / hr.

The flue gas and fly ash were treated by blowing a flue blowing agent into the flue. The blowing amount of the flue blowing agent is as shown in Table 1. The exhaust gas led to the electric dust collector is intermittently sampled, and its HCl gas concentration, Pb
Amount, Hg amount and Cd amount were measured. The results are shown in Table 1. In addition, fly ash collected by an electric dust collector is intermittently sampled and its pH value is measured.
, Pb, C from fly ash in accordance with No. test (1973)
The elution amount of d, As, Cr, and T-Hg was measured. The results are shown in Table 1.

Comparative Example 2 in Table 1 shows the results when the flue blowing agent was not blown into the flue.

[0040]

[Table 1]

The following is clear from Table 1. (A) In the case where the flue blowing agent was not blown into the flue (Comparative Example 2), the HCl concentration in the exhaust gas was 950 on average per day.
ppm, and the collected fly ash is almost neutral, and the elution amounts of various heavy metals are below the detection limit. When a special lime slaked lime is blown into this (Comparative Example 1), the concentration of HCl in the exhaust gas is greatly reduced, and the exhaust gas is neutralized.
However, the pH value of the fly ash after the treatment becomes extremely high,
Are eluted.

(B) On the other hand, when the flue blowing agents of Examples 1 to 4 were used, the exhaust gas was neutralized, and at the same time, the fly ash after the treatment was in an appropriate alkaline range. There is no elution of heavy metals. That is, by using the flue blowing agent of the present invention, the exhaust gas is neutralized and the heavy metals in the exhaust gas can be fixed to the fly ash without elution.

(3) Solidification strength of fly ash Fly ash treated with each flue blowing agent was supplied and kneaded in an appropriate amount to a 300 kg / hr Fujisash twin-screw kneader. At this time, the water supply amount was set within a range of 25 to 35% based on the fly ash while checking the kneading state of each fly ash. For comparison, Portland cement was supplied to the fly ash obtained in Comparative Example 2 in Table 1 at an external rate of 10% with respect to the fly ash, and the same humidifying and kneading was performed to obtain a kneaded product.

Each kneaded material was allowed to stand for 12 hours to solidify, and then the solidification strength of each solidified material was examined. The results are shown in Table 2 as relative values when the solidification strength of the solidified cement was set to 10.

[0045]

[Table 2]

[0046]

As is apparent from the above description, the flue blowing agent of the present invention is blown into the flue of an incinerator,
At the same time as neutralization of exhaust gas can be realized, heavy metals and harmful substances contained in fly ash are securely fixed, and the elution of these heavy metals and harmful substances from fly ash after treatment is effectively suppressed. can do. Further, the fly ash after the treatment can be made into a solidified material having a solidification strength equivalent to that of the solidified material of cement only by kneading with water.

Claims (14)

[Claims] 1. A flue characterized by comprising, as an essential component, a mixture obtained by uniformly mixing 6.9 to 15.6 parts by weight of an aluminum compound in terms of aluminum with respect to 100 parts by weight of calcium hydroxide. Blowing agent. 2. The flue blowing agent according to claim 1, wherein 7.1 to 15.5 parts by weight of an aluminum compound in terms of aluminum is mixed with 100 parts by weight of calcium hydroxide. 3. The flue blowing agent according to claim 1, wherein 8.1 to 13.5 parts by weight of an aluminum compound in terms of aluminum is mixed with 100 parts by weight of calcium hydroxide. 4. The method according to claim 1, wherein the aluminum compound is aluminum hydroxide, aluminum chloride, polyaluminum chloride,
The flue blowing agent according to claim 1, which is at least one member selected from the group consisting of aluminum phosphate, aluminum nitrate, aluminum acetate, aluminum sulfate, and clay minerals. 5. The flue blowing agent according to claim 4, wherein said clay mineral is an aluminum silicate compound represented by feldspar, kaolin and montmorillonite. 6. The flue blowing agent according to claim 1, wherein the aluminum compound contains an amorphous component. 7. The flue blowing agent according to claim 1, wherein the aluminum compound is aluminum hydroxide, and the aluminum hydroxide is uniformly mixed with 20 to 45 parts by weight based on 100 parts by weight of the calcium hydroxide. . 8. The flue blowing agent according to claim 7, wherein said aluminum hydroxide is uniformly mixed with 20.7 to 44.6 parts by weight based on 100 parts by weight of said calcium hydroxide. 9. The flue blowing agent according to claim 7, wherein said aluminum hydroxide is uniformly mixed with 23.3 to 39.0 parts by weight based on 100 parts by weight of said calcium hydroxide. 10. The flue blowing agent according to claim 7, wherein amorphous aluminum hydroxide is mixed in said aluminum hydroxide in an amount of 70% by weight or more. 11. The mixture further comprises at least one selected from the group consisting of potassium-containing substances, gypsum, aluminates, sulfates, and silicate compounds.
2. The flue blowing agent according to claim 1, which is uniformly mixed in an amount of 2 to 20 parts by weight per 0 parts by weight. 12. The flue blowing agent according to claim 11, wherein said potassium-containing substance is potassium sulfate and / or potassium-containing alumina silicate. 13. The flue blowing agent according to any one of claims 1 to 12, which supplies a flue blowing agent according to any one of claims 1 to 12 in a flue from the incinerator to the dust collector to remove fly ash and exhaust gas. A method of using a flue blowing agent, which is characterized by being treated. 14. The composition according to any one of claims 1 to 12, wherein the components are separately supplied at a temperature of 150 ° C or higher in the flue from the incinerator to the dust collector. A method for using a flue blowing agent, wherein fly ash and exhaust gas passing through a temperature location are treated.