CN100569400C - The processing method of combustion ash - Google Patents
The processing method of combustion ash Download PDFInfo
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- CN100569400C CN100569400C CNB2005100230752A CN200510023075A CN100569400C CN 100569400 C CN100569400 C CN 100569400C CN B2005100230752 A CNB2005100230752 A CN B2005100230752A CN 200510023075 A CN200510023075 A CN 200510023075A CN 100569400 C CN100569400 C CN 100569400C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention provides the processing method of the elution amount of a kind of fluorine that makes in the combustion ash to be contained, boron smaller or equal to the combustion ash of environmental benchmark value.The processing method of this combustion ash is characterised in that: combustion ash is carried out mixed processing under the condition that calcium oxide and/or calcium hydroxide kind, blast-furnace cement and aluminum sulfate class and water exist, the elution amount of fluorine is smaller or equal to the elution amount of 0.8mg/L, the boron combustion ash smaller or equal to 1.0mg/L when being modulated at the elution test method of utilizing Japan to equal into No. 18 regulation of Environment Ministry's bulletin in 15 years and making the fluorine that contained in the described combustion ash and/or boron wash-out.
Description
Technical field
The present invention relates to the processing method of a kind of combustion ash (combustion ashes).Especially the inorganic agent and the processing method that relate to the combustion ash that contains fluorine, boron.In addition, the present invention is in order to limit the fluorine of object material to conduct in the soil pollution countermeasure method that meets Japanese Environment Ministry (Chinese Ministry of Environmental Protection) in February, 2003 execution, the regulation of the wash-out limits value of boron, the processing method that also relates to following combustion ash, in the method, by containing fluorine, the combustion ash of boron is at calcium oxide and/or calcium hydroxide kind, carry out mixed processing under the condition that blast furnace cement (blast-furnace cement) and aluminum sulfate class and water exist, thereby the elution amount that makes the fluorine that is contained in this combustion ash is smaller or equal to 0.8mg/L, and when containing boron, the elution amount that makes boron is smaller or equal to 1.0mg/L.
Background technology
As everyone knows, fluorine to the prevention decayed tooth effectively not only can cause dental mottling but excessively absorb fluorine, also can produce the skeleton, the dysarthrasis that are called fluorine poisoning, causes osteosclerosis, and nervous system is exerted an influence.In addition, fluorine is the basic raw material that is widely used in electroplating etc. in the manufacturing of surface treatment and glass, bactericide, resin, chemicals, fertilizer etc., but when fluorine surpasses finite concentration, can hinder the growth of crops, and influence the health of human body, symptoms such as when for example high concentration is absorbed, vomiting then can occurring, have loose bowels and feel sick, and in the teratogenicity test of mouse, be proved the body weight increase that can suppress fetus.In order to prevent these harmful effects, the technique functions of not dissolving of fluorine, boron important effect.
In addition, fluorine, boron also are included in the combustion ash of household garbage burning ash, the combustion ash of coal (coal ash) from the thermal power plant, downflow sludge burning ash, various trade wastes etc., wherein coal ash is owing to containing fluorine, the boron of several mg/kg to hundreds of mg/kg in the original coal, so the amount height of fluorine, boron.In addition, because the major part of this combustion ash is as soil improvement material, backfilling material use, so can the danger that cause underground water pollution be arranged because of wash-outs such as rainwater.In addition, because the processing place of landfill combustion ash is also not enough, so wish preferably to make the fluorine in the combustion ash and boron does not dissolve and in addition effectively utilization.
Detoxification method as the harmful substance in the combustion ash has also proposed melting and solidification method, cement solidification, interpolation lime etc., has extracted schemes such as processing by acid or other solvents.But, the method that can suppress fluorine and boron wash-out simultaneously seldom, can be practical then still less.
Melting and solidification method (patent documentation 1) is decomposing organic matter by discarded object being heated to 1400～1600 ℃ high temperature, and is sealed in the slag that generates harmful substances such as heavy metal and carries out immobilized method.But, fluorine, boron are not carried out immobilized record, also enlighten without any technology.In addition,, there is shortcoming, promptly contains problem that the flying dust of the higher harmful substance of the concentration of new generation handles etc., also exist in addition and comprise cost of equipment in the very high problem of interior processing cost though that this mode is considered to security is very high.
There is a kind of blast furnace cement that utilizes that the boron in the coal ash is solidified and the method (patent documentation 2) of inhibition wash-out, but because of before solidifying, needing the maintenance fate about a week, so place that needs to place coal ash after handling, thereby be restricted, even and utilize the proterties of ash to be solidified, sometimes this solidfied material is not had a durability yet, for example can expect the cement weathering and causes the ash composition wash-out, causes pollution thus.And in the method, can carry out the boron that has only of wash-out inhibition, can not expect effect fluorine.
In addition, also have a kind of under the condition that water exists in mud mixing lime, lime combustion ash, gypsum, thereby the method (patent documentation 3) that suppresses fluorine and boron wash-out, but the elution amount that is used to make fluorine and boron approximately needs week age smaller or equal to the maintenance of soil environment a reference value, identical with above-mentioned situation, need to place the place of coal ash after the processing, thereby be restricted.In addition, after processing, solidify to advance, be difficult to as soil improvement material, use such as banket.
In addition, also have and a kind ofly make fluorine, boron in the draining be adsorbed onto hydrogeneous zirconic composite hydrophilic polymer shaping body (patent documentation 4), method (patent documentation 5) to remove smaller or equal to the magnesia behind 1400 ℃ the temperature combustion, but technical being difficult to is applied to the innoxious of combustion ash with these methods, even these heavy prices and the adsorbent that makes trouble are added in the ash, make fluorine, the undissolved effect of boron also not obvious, and adsorbent can not reclaim, thereby become the extremely method of heavy price, so unrealistic.
For utilizing sour equal solvent to extract to remove boron (for example non-patent literature 1), then handle to need a large amount of water and time, also need attendant equipment that the draining of boracic is handled, like this then need very large-scale equipment, cost of equipment is very expensive, is not suitable for practicality.And this method is also not obvious to the effect of fluorine.
Also have in cement add calcium salt make soil or burn that thereby fluorine, boron in the ash solidifies undissolved method (patent documentation 6) thereby or add that magnesia and gypsum make soil or the fluorine, the boron that burn in the ash solidify undissolved method (patent documentation 7), but needed maintenance 7 days, and, thereby be restricted on utilizing because be cured.When with combustion ash as snow melt material or banketing and backfilling material when using as improvement soil improvement material of acid ground or construction project, the method that suppresses fluorine and boron wash-out simultaneously is restricted, and for example all can not utilize with method such as re-using after theing cement solidifies.In addition, even do not consider to handle the restriction that needs more time and place, the fluorine in addition also must certain corresponding combustion ash and the change of boron amount and bring into play the inhibition effect.As described in top detailed description, in the processing method of existing ash, do not have to suppress the wash-out of fluorine and boron and the scheme that meets the demands simultaneously.
Patent documentation 1: Japanese patent laid-open 9-271738 communique
Patent documentation 2: the Japan Patent spy opens the 2001-310175 communique
Patent documentation 3: the Japan Patent spy opens the 2002-346595 communique
Patent documentation 4: the Japan Patent spy opens the 2002-38038 communique
Patent documentation 5: the Japan Patent spy opens the 2001-340872 communique
Patent documentation 6: the Japan Patent spy opens the 2004-89816 communique
Patent documentation 7: the Japan Patent spy opens the 2004-298741 communique
Non-patent literature 1: Da Lin group technical research institute reports No.65 2002 P95～100
Summary of the invention
The object of the present invention is to provide and a kind ofly be used for suppressing from coal, RPF is the fluorine in combustion ash of discharging in the boiler of fuel and the ash of the discharging from the incinerator of paper grade (stock) mud etc., easy and the inexpensive method of the wash-out of boron, to replace the such complexity of above-mentioned cement solidification and fusion, take a lot of trouble and need the method for expense, and before manifesting effect, need time method, the present invention is by suppressing the wash-out of fluorine and boron simultaneously, thereby will can not cause soil pollution, the combustion ash of water pollution effectively utilizes in soil improvement material, the grassland improvement material, backfilling material, various uses such as banket.
The present invention is used for suppressing the fluorine that combustion ash contains, the method for boron wash-out, comprises the following invention that can solve the problems of the technologies described above.
(1) a kind of processing method of combustion ash, it is characterized in that: mixed processing combustion ash under the condition that calcium oxide and/or calcium hydroxide kind, blast furnace cement and aluminum sulfate class and water exist, the elution amount of fluorine is smaller or equal to the elution amount of 0.8mg/L, the boron combustion ash smaller or equal to 1.0mg/L when being modulated at the elution test method of utilizing Japan to equal into No. 18 regulation of Environment Ministry's bulletin in 15 years and making the fluorine wash-out that is contained in the described combustion ash.
(2) on the basis of the processing method of (1) described combustion ash, it is characterized in that: described combustion ash is selected from burning of coal ash, RPF (Refused Paper and PlasticsFuel, waste paper waste plastics fuel) at least a in combustion ash and the combustion ash of discharging from the incinerator of paper grade (stock) mud etc. is the combustion ash that contains fluorine and/or boron.
(3) on the basis of the processing method of (1) or (2) described combustion ash, it is characterized in that: employed calcium oxide and/or calcium hydroxide kind were to be selected from least a in lime that the calcium source burning of lime stone, dolomite, scallop, the outstanding acid sludge of particulate and waster paper slag obtains and the hydroxide thereof during described combustion ash was handled.
(4) on the basis of the processing method of each described combustion ash, it is characterized in that in (1) to (3): described blast furnace cement is at least a in A kind, B kind and the C kind that is selected from the quality with JIS R 5211 JIS defineds.
(5) in (1) to (4) on the basis of the processing method of each described combustion ash, it is characterized in that: the mass ratio of the mass ratio of the mass ratio of described combustion ash and calcium oxide and/or calcium hydroxide kind, combustion ash and blast furnace cement and combustion ash and aluminum sulfate aqueous solution is respectively: combustion ash/calcium oxide and/or calcium hydroxide kind are 100/0.5～100/10, combustion ash/blast furnace cement is 100/0.5～100/10, and combustion ash/aluminum sulfate aqueous solution recently is expressed as 100/0.5～100/10 with combustion ash/aluminum sulfate.
(6) in (1) to (5) on the basis of the processing method of each described combustion ash, it is characterized in that: the mass ratio of described combustion ash and calcium oxide and/or calcium hydroxide kind is that combustion ash/calcium oxide and/or calcium hydroxide kind are 100/5～100/10.
The present invention is as suppressing simultaneously from coal, RPF is the fluorine in combustion ash of discharging in the boiler of fuel and the ash of the discharging from the incinerator of paper grade (stock) mud etc., the method of the wash-out of boron, a kind of easy and inexpensive method can be provided, to replace the so complicated and bothersome method of above-mentioned cement solidification and fusion, and before manifesting effect, need time method, the present invention is by suppressing the wash-out of fluorine and boron, thereby can will can not cause soil pollution, the combustion ash of water pollution is as the snow melt material, soil improvement material, the grassland improvement material, backfilling material, use such as banket, and can not make a very bad impression to environment.
The specific embodiment
Below, specify the present invention.
Though the not dissolution mechanism of the fluorine that is contained in the combustion ash etc., boron is now also indeterminate, but the present invention attempts adding calcium oxide and/or calcium hydroxide kind, add the aqueous solution of various sulfur-bearing acid groups (sulfuric acid, gypsum, sodium sulphate, aluminum sulfate, ferrous sulfate etc.) under the condition that blast furnace cement (blast-furnace cement) exists as inorganic agent, the result is surprised to find: by using aluminum sulfate aqueous solution, after processing, only pass through a few hours, the effect that suppresses fluorine and boron wash-out is simultaneously just arranged.Therefore, method of the present invention is applicable to and handles the most effective to containing both combustion ash of fluorine and boron.
The combustion ash that method of the present invention was suitable for is coal, RPF (Refused Paper ﹠amp; Plastics Fuel, waste paper waste plastics fuel) and the combustion ash that produces during burning such as paper mill sludge, particularly, the flying dust that the gas of discharging when being these substance combustions is caught by precipitator (EP) or bag hose etc. (abbreviating EP ash and bag ash respectively as) etc.
Calcium oxide used in the present invention and/or calcium hydroxide kind need be combined into crystal structure with the fluorine in the combustion ash, boron or their compound, therefore, as calcium oxide and/or calcium hydroxide kind use quick lime, calcium hydroxide or the hydroxide of the lime that obtains by calcium sources burnings such as lime stone, dolomite, scallop, the outstanding acid sludge of particulate and waster paper slags and these lime in any one, re-use after perhaps also these materials can being mixed with arbitrary proportion, preferable to the wash-out that suppresses fluorine and boron like this.
Blast furnace cement used in the present invention is blended in blast furnace slag equably in the portland cement and forms, and is categorized as A kind, B kind and C kind according to its fit rate, but is not limited thereto.In addition, the blast furnace cement of selling on the market that preferably obtains easily in the use, but be not limited thereto.
Mass ratio when handling about combustion ash and with calcium oxide and/or calcium hydroxide kind, blast furnace cement and aluminum sulfate aqueous solution, preferred burn ash/calcium oxide and/or calcium hydroxide kind and combustion ash/blast furnace cement are 200/1～100/10 scope, more preferably 100/1～100/5.If mass ratio is discontented with 200/1, then the immobilization of fluorine and boron is insufficient, if mass ratio surpasses 100/10 on the contrary, the absolute magnitude of the ash after then handling increases, and is restricted in the utilization, and cost also can increase, so unactual.On the other hand, the scope of the mass ratio of combustion ash/aluminum sulfate preferred 200/1～100/10, more preferably 100/1～100/10.Preferred 5～30 quality % of water yield relative combustion ash that add.
After in combustion ash, adding calcium oxide and/or calcium hydroxide kind, blast furnace cement and aluminum sulfate aqueous solution, preferably fully stir, by stirring additive is evenly dispersed in the combustion ash more, can carries out the immobilization of fluorine and boron with the medicine that minimum is limited the quantity of.Can use the general mixer of selling on the market as mixer, but not have particular determination.Because of not producing foul smell etc. in the processing procedure, so be the method for extremely safe.
Utilize combustion ash that the present invention handles only after 3 hours, for the fluorine of the elution test method wash-out of putting down into No. the 18th, 15 years Environment Ministry (Chinese Ministry of Environmental Protection) bulletin according to Japan and the elution amount of boron, fluorine when being untreated relatively more than or equal to 5.2mg/L and boron more than or equal to 2.5mg/L, fluorine, boron have just all reached limits value (fluorine: 0.8mg/L, boron: below 1.0mg/L) half.And, also can suppress the wash-out of the heavy metal beyond the fluorine, boron.Can not solidify after the processing yet, and be in moisture state, so also be easy to handle various uses such as can be used in snow melt material, soil improvement material, grassland improvement material, backfilling material, banket.
Embodiment
Enumerate embodiment below and comparative example more specifically describes the present invention, the present invention is not limited to these embodiment certainly, only otherwise break away from purport of the present invention, can change its embodiment.
In addition, among below the embodiment and comparative example, suppressing the combustion ash that test portion uses as the wash-out of fluorine and boron is the EP ash of catching as the precipitator (EP) of the motor-driven stove of fuel by with coal.The amount of chemical composition and fluorine, boron, elution amount are shown in following table 1.
Table 1:
(1) elution process of fluorine and boron
In described below each embodiment and the comparative example, it is that benchmark carries out No. 18 that the elution test of boron is put down into Environment Ministry's bulletin in 15 years with Japan.That is, utilize the precipitator (EP) that is arranged in motor-driven stove flue to catch flying dust, the grey test portion that is untreated or has handled of this flying dust is air-dry, finger stone, wood chip etc. in the removal, after the fritter pulverizing, making its mesh by nonmetal system is the sieve of 2mm, these materials is fully mixed again.From this test portion, take out the polyethylene can with cover that 50g puts into 1000ml, add 500ml pure water (pH5.8～6.3).The sample liquid of this modulation is used industrial waste wash-out vibrating machine (manufacturing of イ テ ッ Network society) continuous oscillation 6 hours (oscillation amplitude is that 4～5cm, vibration velocity are 200 times/minute) under normal temperature, atmospheric pressure.With this solution left standstill after 30 minutes, the speed centrifugation of changeing with per minute about 3,000 20 minutes.Is that the molecular filter (membrane filter) of 0.45 μ m filters with supernatant with the aperture, obtains filtrate, correctly measures quantitatively required amount, with it as test fluid.
(2) assay method of fluorine
With ion chromatograph (manufacturing of DX-120/DIONEX society) analytical test liquid, the fluorine of wash-out is carried out quantitatively.
(3) assay method of boron
With ICP-OES (inductively coupled plasma emission spectroanalysis device, リ ガ Network/SPECTORO society manufacturing, CIROS-120 type) analytical test liquid, the boron amount of wash-out is carried out quantitatively.
Embodiment 1
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, after adding the solid quick lime of 25g klining, 15g blast furnace cement B, fully stir, with sprayer even spraying aluminum sulfate aqueous solution, wherein aluminum sulfate aqueous solution be relative 100 mass parts ashes (parching) to be adjusted to aluminum sulfate be 5 mass parts, add water is 25 mass parts, fully stir then.Curing time (maintenance fate) was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Embodiment 2
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, after adding the solid lime of 25g klining, 15g blast furnace cement B, fully stir, with sprayer even spraying aluminum sulfate aqueous solution, wherein aluminum sulfate aqueous solution be relative 100 mass parts ashes (parching) to be adjusted to aluminum sulfate be 3.5 mass parts, add water is 10 mass parts, fully stir then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Embodiment 3
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, after adding 25g calcium hydroxide, 15g blast furnace cement B, fully stir, with sprayer even spraying aluminum sulfate aqueous solution, wherein aluminum sulfate aqueous solution be relative 100 mass parts ashes (parching) to be adjusted to aluminum sulfate be 3.5 mass parts, add water is 10 mass parts, fully stir then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Embodiment 4
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, after adding 15g calcium hydroxide, 15g blast furnace cement B, fully stir, with sprayer even spraying aluminum sulfate aqueous solution, wherein aluminum sulfate aqueous solution be relative 100 mass parts ashes (parching) to be adjusted to aluminum sulfate be 3.5 mass parts, add water is 10 mass parts, fully stir then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 1
With the EP ash of above-mentioned elution method and determination method analysis coal burning boiler, try to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 2
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, after 125ml pure water usefulness sprayer even spraying, fully stirs.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 3
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, add 15g blast furnace cement B after, fully stir, with the 125ml pure water with the sprayer even spraying after, fully stir.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 4
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, add the solid lime of 25g klining, 15g blast furnace cement B after, fully stir, the 125ml pure water is carried out even spraying with sprayer to ash (parching) after, fully stir.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 5
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, the solid lime of 25g klining, 15g blast furnace cement B and relative 100 mass parts ashes (parching) are modulated into the concentrated sulfuric acid is 5 mass parts, add water be the aqueous sulfuric acid of 25 mass parts with the sprayer even spraying after, fully stir.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 6
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, adding the solid lime of 25g klining, 15g blast furnace cement B and calcium sulfate is the semi-hydrated gypsum of 5 mass parts with respect to 100 mass parts ashes (parching), use sprayer even spraying pure water again, and making the total amount of the crystal water of adding water and semi-hydrated gypsum is 25 mass parts with respect to 100 mass parts ashes, fully stirs then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 7
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, behind interpolation 25g klining solid lime, 15g blast furnace cement B and the 25g sodium sulphate, fully stirs, and with 125ml pure water sprayer even spraying, fully stirs then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
Comparative example 8
The EP ash of measuring the 500g coal burning boiler is put into vinyl bag, add the solid lime of 25g klining, 15g blast furnace cement B and with ferrous sulfate as FeSO
4After adding 25g (words of crystallization then are 48g), fully stir, with sprayer even spraying pure water, making the interpolation water of the crystallization water that comprises ferrous sulfate is 25 mass parts for 100 mass parts ashes, fully stirs then.Curing time was respectively 3 hours, 1 day, 3 days, 10 days, and corresponding each curing time is analyzed with above-mentioned elution method and determination method respectively, tries to achieve the elution amount of fluorine and boron.Its result is as shown in table 2.
As shown in Table 2, in embodiment 1～4, only need in coal EP ash, to add calcium oxide or calcium hydroxide, blast furnace cement and aluminum sulfate aqueous solution and stir, can after processing, only just be lower than a reference value significantly in 3 hours, realize not dissolving of fluorine and boron simultaneously.
On the other hand, as described in comparative example 2, when only water carries out humidification to coal EP ash, compare with the dry ash state and can reduce the elution amount of fluorine and boron slightly, but still be higher than limits value.In addition, when in comparative example 3, only adding blast furnace cement and water, in comparative example 4, add when baking lime, blast furnace cement and water, suppress effect though can see the wash-out of boron, but the wash-out of fluorine suppresses effect makes slow progress, and wants the maintenance that then needs 10 days smaller or equal to limits value.In comparative example 5～8, when baking lime/or the condition that exists of blast furnace cement under add sulfuric acid, gypsum, sodium sulphate or ferrous sulfate such contain the aqueous solution of various sulfate radicals the time, want to suppress simultaneously the maintenance that the wash-out of fluorine and boron makes it then need 10 days smaller or equal to limits value.
As mentioned above, method of the present invention is added calcium oxide and/or calcium hydroxide kind, blast furnace cement and aluminum sulfate aqueous solution in combustion ash, and stir, only need to suppress simultaneously in 3 hours the fluorine in the combustion ash and the wash-out of boron, make its limits value smaller or equal to Japanese soil pollution countermeasure method, the present invention that hence one can see that is a kind of rapid, easy and active and effective method.
Utilizability on the industry
The method according to this invention only needs at flue or outlet, to from coal-burning boiler or with RPF adds foregoing calcium oxide in the combustion ash of discharging in the RPF boiler of fuel Class and/or calcium hydroxide kind, blast furnace cement and aluminum sulfate class and water are processed, and can realize Innoxious, and because resulting ash does not solidify, then utilize occasion unrestricted, can Effectively be used in snow melting material, soil improvement material, grassland improvement material, backfilling material, Banket etc.
Claims (5)
1. the processing method of a combustion ash, it is characterized in that: with combustion ash at calcium oxide and/or calcium hydroxide, carry out mixed processing under the condition that blast-furnace cement and aluminum sulfate and water exist, the elution amount that is modulated at fluorine when utilizing Japanese elution test method of equalling into No. 18 regulation of Environment Ministry's bulletin in 15 years to make the fluorine wash-out that is contained in the described combustion ash is smaller or equal to 0.8mg/L, the elution amount of boron is smaller or equal to the combustion ash of 1.0mg/L, wherein, the mass ratio of described combustion ash and calcium oxide and/or calcium hydroxide, the mass ratio of combustion ash and blast furnace cement, and the mass ratio of combustion ash and aluminum sulfate aqueous solution is respectively: combustion ash/calcium oxide and/or calcium hydroxide are 100/0.5～100/10, combustion ash/blast furnace cement is 100/0.5～100/10, and combustion ash/aluminum sulfate aqueous solution recently is expressed as 100/0.5～100/10 with combustion ash/aluminum sulfate.
2. the processing method of combustion ash according to claim 1, it is characterized in that: described combustion ash be selected from the combustion ash of burning of coal ash, waste paper waste plastics fuel and the combustion ash of from the incinerator of paper grade (stock) mud, discharging at least a, be the combustion ash that contains fluorine and/or boron.
3. the processing method of combustion ash according to claim 1 is characterized in that: employed calcium oxide and/or calcium hydroxide were to be selected from lime stone, dolomite, scallop, and the calcium source burning of waster paper slag and at least a in the lime that obtains and the hydroxide thereof during described combustion ash was handled.
4. the processing method of combustion ash according to claim 1 is characterized in that: described blast furnace cement is at least a in A kind, B kind and the C kind that is selected from the quality with JIS R 5211 JIS defineds.
5. the processing method of combustion ash according to claim 1, it is characterized in that: the mass ratio of described combustion ash and calcium oxide and/or calcium hydroxide is that combustion ash/calcium oxide and/or calcium hydroxide are 100/5～100/10.
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| JP2004380135A JP4826089B2 (en) | 2004-12-28 | 2004-12-28 | Combustion ash treatment method |
| JP2004380135 | 2004-12-28 |
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| CN100569400C true CN100569400C (en) | 2009-12-16 |
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| JP5092203B2 (en) * | 2005-04-13 | 2012-12-05 | 英昭 水渡 | Method for suppressing elution of fluorine and heavy metals from waste |
| JP2006316195A (en) * | 2005-05-13 | 2006-11-24 | Daio Paper Corp | Soil-improving material |
| JP5265103B2 (en) * | 2006-10-18 | 2013-08-14 | 村樫石灰工業株式会社 | Method for producing a composition for insoluble treatment of hazardous substances |
| JP2008275181A (en) * | 2007-01-12 | 2008-11-13 | Chugoku Electric Power Co Inc:The | Method of inhibiting elution of harmful trace element |
| JP2008273997A (en) * | 2007-01-12 | 2008-11-13 | Chugoku Electric Power Co Inc:The | Elution inhibitor for controlling elution of harmful trace element, method for controlling elution and method for combustion of dust coal |
| JP5506076B2 (en) * | 2009-03-23 | 2014-05-28 | 大王製紙株式会社 | Soil improving material and method for producing the same |
| JP2012213713A (en) * | 2011-03-31 | 2012-11-08 | Nippon Paper Industries Co Ltd | Method for treating incineration ash |
| JP5836096B2 (en) * | 2011-12-07 | 2015-12-24 | 太平洋マテリアル株式会社 | Earthwork materials |
| JP6077778B2 (en) * | 2011-12-07 | 2017-02-08 | 太平洋マテリアル株式会社 | Earthwork materials |
| JP5976415B2 (en) * | 2012-06-22 | 2016-08-23 | 太平洋マテリアル株式会社 | Earthwork materials |
| JP6002496B2 (en) * | 2012-06-22 | 2016-10-05 | 太平洋マテリアル株式会社 | Earthwork materials |
| JP6373257B2 (en) * | 2013-03-22 | 2018-08-15 | 新日鐵住金ステンレス株式会社 | Dust cleaning method |
| JP6305737B2 (en) * | 2013-06-24 | 2018-04-04 | 株式会社トクヤマ | Powdered composition using coal ash |
| JP5874695B2 (en) * | 2013-08-01 | 2016-03-02 | 栗田工業株式会社 | Detoxification method for solid waste containing heavy metals |
| JP6284752B2 (en) * | 2013-10-25 | 2018-02-28 | 株式会社トクヤマ | Powdered composition using coal ash |
| JP6221631B2 (en) * | 2013-10-29 | 2017-11-01 | 宇部興産株式会社 | Insolubilizer, production method thereof, and insolubilization method |
| JP6248739B2 (en) * | 2014-03-26 | 2017-12-20 | 王子ホールディングス株式会社 | Combustion ash treatment method and use thereof |
| JP6527025B2 (en) * | 2014-08-25 | 2019-06-05 | 太平洋セメント株式会社 | Method of insolubilizing heavy metals in coal ash, and method of producing earthworking materials in which heavy metals are insolubilized |
| JP6441086B2 (en) * | 2015-01-08 | 2018-12-19 | 株式会社トクヤマ | Effective use of coal ash |
| JP5913675B1 (en) * | 2015-03-30 | 2016-04-27 | 吉澤石灰工業株式会社 | Hazardous substance insolubilizing agent and method for insolubilizing hazardous substances |
| JP7465322B1 (en) | 2022-10-24 | 2024-04-10 | 株式会社トクヤマ | Method for producing modified incineration ash, and modified incineration ash |
| JP7465386B1 (en) | 2023-03-31 | 2024-04-10 | 株式会社トクヤマ | Manufacturing method of modified incineration ash |
| JP7465402B1 (en) | 2023-10-11 | 2024-04-10 | 株式会社トクヤマ | Manufacturing method for modified wood biomass ash |
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| JP3891044B2 (en) * | 2002-06-04 | 2007-03-07 | 栗田工業株式会社 | Methods for insolubilizing heavy metals in contaminated soil |
| JP3765415B2 (en) * | 2002-07-25 | 2006-04-12 | 敏雄 北原 | Heavy metal stabilizer, heavy metal stabilization method, and heavy metal-containing material treatment method |
| JP2004167374A (en) * | 2002-11-20 | 2004-06-17 | Kawasaki Heavy Ind Ltd | Method and apparatus for stabilizing contaminated soil/waste |
| JP2004243192A (en) * | 2003-02-13 | 2004-09-02 | Hitachi Constr Mach Co Ltd | Method and system for treating contaminated soil and contaminated soil treatment machine |
| JP4965065B2 (en) * | 2003-11-17 | 2012-07-04 | 四国電力株式会社 | Method for producing ground material and method for reusing ground material obtained thereby |
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| JP4826089B2 (en) | 2011-11-30 |
| CN1796014A (en) | 2006-07-05 |
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