JP6303308B2 - Coal transportation method - Google Patents
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- JP6303308B2 JP6303308B2 JP2013146403A JP2013146403A JP6303308B2 JP 6303308 B2 JP6303308 B2 JP 6303308B2 JP 2013146403 A JP2013146403 A JP 2013146403A JP 2013146403 A JP2013146403 A JP 2013146403A JP 6303308 B2 JP6303308 B2 JP 6303308B2
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- 239000003245 coal Substances 0.000 title claims description 155
- 238000000034 method Methods 0.000 title claims description 31
- 238000002360 preparation method Methods 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 22
- 238000009472 formulation Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- -1 polyoxyethylene Polymers 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 12
- 150000005215 alkyl ethers Chemical class 0.000 claims description 9
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical class OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims 1
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- 239000007788 liquid Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
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- 150000001335 aliphatic alkanes Chemical class 0.000 description 4
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
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- 238000012545 processing Methods 0.000 description 4
- RUPBZQFQVRMKDG-UHFFFAOYSA-M Didecyldimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC RUPBZQFQVRMKDG-UHFFFAOYSA-M 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 229960004670 didecyldimethylammonium chloride Drugs 0.000 description 3
- YHAIUSTWZPMYGG-UHFFFAOYSA-L disodium;2,2-dioctyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCCCC(C([O-])=O)(C(C([O-])=O)S(O)(=O)=O)CCCCCCCC YHAIUSTWZPMYGG-UHFFFAOYSA-L 0.000 description 3
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
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- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 description 1
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- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012223 aqueous fraction Substances 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000012466 permeate Substances 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229940077386 sodium benzenesulfonate Drugs 0.000 description 1
- MZSDGDXXBZSFTG-UHFFFAOYSA-M sodium;benzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1 MZSDGDXXBZSFTG-UHFFFAOYSA-M 0.000 description 1
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Description
本発明は、石炭搬送方法に関する。 The present invention relates to a coal conveying method.
石炭は、コークス原料として用いられ、また、発電ボイラや焼成キルンの燃料等として利用される。石炭は、その輸送・貯蔵工程において降雨の影響を受け、水分が上昇する場合がある。水分が上昇するとベルトコンベアーでの搬送工程やシュート部、ホッパー等で詰まりや閉塞、付着等の問題が生じやすくなり、一旦問題が生じると石炭搬送停止による次工程の生産トラブルにまで発展する場合がある。 Coal is used as a raw material for coke, and is also used as a fuel for power generation boilers and fired kilns. Coal is affected by rainfall in its transportation and storage process, and its moisture content may increase. If moisture rises, problems such as clogging, clogging, adhesion, etc. are likely to occur in the conveyor process, chute, hopper, etc. of the belt conveyor, and once a problem occurs, it may lead to production trouble in the next process due to coal transportation stoppage. is there.
その対策としては、人力で詰まり物を除去する他に、配管内の詰まりであれば圧縮空気を送ることで詰まり物を除去したり、調湿炭設備により石炭水分を低減させ詰まりを起き難いように処理する等の方法があった。 As countermeasures, in addition to removing clogs by human power, if clogging is present in the piping, the clogging will be removed by sending compressed air, or the moisture content of the coal will be reduced by the humidity control equipment so that clogging will not occur. There was a method of processing.
しかし、人力の処理は、詰まりが発生した後の処理であるため、予防対策とはならず、また、人力での処理は、対処をする迄に時間が掛かった。圧縮空気による除去も、詰まりが発生した後の処理であるため予防対策とはならず、また、配管のような箇所でないと使用できない方法であった。調湿炭設備は、予防対策としてはよいが、加熱源に蒸気が必要であり、そのための設備投資も必要であった。 However, since human power processing is processing after clogging occurs, it is not a preventive measure, and human power processing takes time until it is dealt with. Removal with compressed air is also a method after clogging has occurred, so it is not a preventive measure, and is a method that can only be used in places like piping. Although the humidity control equipment is good as a preventive measure, steam is necessary for the heating source, and equipment investment for that is also necessary.
特許文献１には石炭の全水分が５％以上のとき、石炭粒子間の付着力を低減させるために界面活性剤を添加する方法が記載されている。 Patent Document 1 describes a method of adding a surfactant in order to reduce the adhesion between coal particles when the total moisture of coal is 5% or more.
しかしながら、この方法は、石炭全水分を基準にしており、後述の通り、付着力に影響を与えている付着水分に着目していないため、実際に付着の問題が発生していない場合でも薬剤を散布する場合が多く、経済的でない。 However, since this method is based on the total moisture of coal and does not pay attention to the adhered moisture that affects the adhesion as described later, even if the adhesion problem does not actually occur, Often sprayed, not economical.
本発明は以上の実情に鑑みてなされたものであり、過剰な設備投資を必要とせず、簡便にかつ経済的に石炭の詰まりの抑制することができる石炭搬送方法を提供することを目的とする。 This invention is made | formed in view of the above situation, and it aims at providing the coal conveyance method which can suppress clogging of coal simply and economically without requiring excessive capital investment. .
本発明者らは、石炭の付着水分によって石炭の詰まりやすさが異なることを見出し、本発明を完成するに至った。より具体的には、本発明は以下のようなものを提供する。 The present inventors have found that the ease of clogging of coal varies depending on the moisture adhering to the coal, and have completed the present invention. More specifically, the present invention provides the following.
（１）６〜１０質量％の付着水分を含む石炭に、ジアルキルスルホコハク酸及び／又はその塩、アルカンスルホン酸及び／又はその塩、ポリオキシエチレンアルキルエーテル硫酸塩及び／又はそのトリエタノールアミン塩ならびにポリオキシアルキレンアルキルエーテルからなる群から選択される１種以上を含む製剤を適用する工程を有する、石炭搬送方法。 (1) To coal containing 6 to 10% by mass of adhering moisture, dialkylsulfosuccinic acid and / or a salt thereof, alkanesulfonic acid and / or a salt thereof, polyoxyethylene alkyl ether sulfate and / or a triethanolamine salt thereof, and The coal conveyance method which has the process of applying the formulation containing 1 or more types selected from the group which consists of polyoxyalkylene alkyl ether.
（２）前記製剤の適用は、前記石炭の付着水分を検出し、その結果に基づいて行う（１）に記載の石炭搬送方法。 (2) The coal preparation method according to (1), wherein the preparation is applied based on the result of detecting moisture adhering to the coal.
（３）前記付着水分の検出は、前記石炭に含まれる全水分と包蔵水分とを測定し、その測定値に基づいて行う（２）に記載の石炭搬送方法。 (3) The method for transporting coal according to (2), wherein the detection of the adhering moisture is performed based on a measurement value obtained by measuring total moisture and embedded moisture contained in the coal.
（４）石炭に含まれる付着水分に基づいて、前記石炭の詰まりやすさを評価する方法。 (4) A method for evaluating the ease of clogging of the coal based on adhering moisture contained in the coal.
本発明によれば、石炭の搬送において、６〜１０質量％の付着水分を含む石炭に、所定の製剤を適用するので、過剰な設備投資を必要とせず、簡便にかつ経済的に石炭の詰まりの抑制をすることができる。 According to the present invention, since a predetermined formulation is applied to coal containing 6 to 10% by mass of adhering moisture in transporting coal, clogging of coal is simple and economical without requiring excessive capital investment. Can be suppressed.
以下、本発明の実施形態について説明するが、本発明はこれに限定されるものではない。 Hereinafter, although embodiment of this invention is described, this invention is not limited to this.
＜石炭搬送方法＞
本発明の石炭搬送方法は、６〜１０質量％の付着水分を含む石炭に、ジアルキルスルホコハク酸及び／又はその塩、アルカンスルホン酸及び／又はその塩、ポリオキシエチレンアルキルエーテル硫酸塩及び／又はそのトリエタノールアミン塩ならびにポリオキシアルキレンアルキルエーテルからなる群から選択される１種以上を含む製剤を適用する工程を有することを特徴とする。
<Coal transport method>
The method for conveying coal according to the present invention comprises dialkyl sulfosuccinic acid and / or a salt thereof, alkane sulfonic acid and / or a salt thereof, polyoxyethylene alkyl ether sulfate and / or a mixture thereof, containing 6 to 10% by mass of adhering moisture. It has the process of applying the formulation containing 1 or more types selected from the group which consists of a triethanolamine salt and a polyoxyalkylene alkyl ether.
石炭の付着水分が上昇すると、石炭粒子同士が接触している時の付着力を上げる働きを持つため、流動性が悪化し詰まりを促進させることとなる。本発明の製剤は、石炭と付着水分とに作用することで、付着水分が石炭表面から石炭内部の細孔へ浸透させる働きを持つため、表面で付着力を発揮する水分が少なくなる。これによって、本発明の石炭搬送方法は、石炭の滑りを促進させ、その結果、石炭の詰まりを予防すると考えられる。 When the adhesion moisture of coal rises, since it has the function of increasing the adhesion when coal particles are in contact with each other, fluidity deteriorates and clogging is promoted. The preparation of the present invention acts on coal and adhering moisture, so that the adhering moisture permeates from the coal surface into the pores inside the coal, so that the amount of moisture that exerts adhesive force on the surface is reduced. Thereby, it is thought that the coal conveyance method of the present invention promotes slipping of coal and, as a result, prevents clogging of coal.
石炭に含まれる付着水分が６質量％より少ないと、石炭粒子同士の付着力が低いため、石炭詰まりが発生し難く、製剤を適用する必要が無い。これに対し、本発明の製剤は、付着水分が６〜１０質量％である石炭に適用されるため、石炭詰まりが促進されるが、表面水分が石炭内部に浸み込むことができるため、製剤によって石炭の滑りが促進され、石炭詰まりが抑制される。なお、本発明は、石炭に含まれる付着水分が１０質量％以上である場合に製剤を適用してもよい。付着水分が１０質量％以上である石炭に対して製剤を適用する場合は、付着水分が１０質量％以上である石炭に対して滑り促進効果を発揮する、別の化合物を使用してもよく、また、その化合物と、ジアルキルスルホコハク酸及び／又はその塩、アルカンスルホン酸及び／又はその塩、ポリオキシエチレンアルキルエーテル硫酸塩及び／又はそのトリエタノールアミン塩ならびにポリオキシアルキレンアルキルエーテルからなる群から選択される１種以上を併用してもよい。 If the adhesion moisture contained in the coal is less than 6% by mass, the adhesion between the coal particles is low, so that coal clogging hardly occurs and it is not necessary to apply the preparation. On the other hand, since the preparation of the present invention is applied to coal having an adhering moisture of 6 to 10% by mass, the clogging of coal is promoted, but the surface moisture can penetrate into the inside of the coal. As a result, the sliding of coal is promoted and coal clogging is suppressed. In addition, this invention may apply a formulation, when the adhesion water | moisture content contained in coal is 10 mass% or more. When the formulation is applied to coal having an adhering moisture of 10% by mass or more, another compound that exerts a slip promoting effect on the coal having an adhering moisture of 10% by mass or more may be used. The compound is selected from the group consisting of dialkylsulfosuccinic acid and / or salt thereof, alkanesulfonic acid and / or salt thereof, polyoxyethylene alkyl ether sulfate and / or triethanolamine salt thereof, and polyoxyalkylene alkyl ether. One or more of these may be used in combination.
本発明の製剤は、ジアルキルスルホコハク酸及び／又はその塩、アルカンスルホン酸及び／又はその塩、ポリオキシエチレンアルキルエーテル硫酸塩及び／又はそのトリエタノールアミン塩ならびにポリオキシアルキレンアルキルエーテルからなる群から選択される1種以上を含めば特に限定されない。これらの化合物を含むことによって、本発明は、石炭の滑りを促進させることができる。 The preparation of the present invention is selected from the group consisting of dialkylsulfosuccinic acid and / or its salt, alkanesulfonic acid and / or its salt, polyoxyethylene alkyl ether sulfate and / or its triethanolamine salt, and polyoxyalkylene alkyl ether It is not particularly limited as long as it includes one or more kinds. By including these compounds, the present invention can promote the slip of coal.
本発明の製剤は、６〜１０質量％の付着水分を含む石炭に、ジアルキルスルホコハク酸等の上記滑り促進効果を有する化合物を適用することのみで、石炭の詰まりを防止することができるので、過剰な設備投資を要さず、簡便に、かつ、経済的に石炭の詰まりを防止することができる。また、本発明によると、６質量％より少ない付着水分を含む石炭には本発明の製剤を適用する必要はないので、製剤の余計な消費を抑えることができ、この点においても本発明は経済的である。 The formulation of the present invention can prevent clogging of coal only by applying a compound having the above-mentioned slip promoting effect such as dialkylsulfosuccinic acid to coal containing 6 to 10% by mass of adhering moisture. Therefore, it is possible to easily and economically prevent clogging of coal without requiring a large capital investment. In addition, according to the present invention, it is not necessary to apply the preparation of the present invention to coal containing less than 6% by weight of adhering moisture, so that unnecessary consumption of the preparation can be suppressed. In this respect as well, the present invention is economical. Is.
製剤の形態は、特に限定されず、液状であっても、粉状であってもよいが、製剤中に含まれるジアルキルスルホコハク酸等が、石炭に適用した際に、石炭と混合しやすいという点で、液状であるのが好ましい。 The form of the preparation is not particularly limited and may be liquid or powdery. However, when the dialkylsulfosuccinic acid or the like contained in the preparation is applied to coal, it is easy to mix with coal. It is preferable that it is liquid.
本発明の製剤を適用する方法は、特に限定されないが、散布、塗布等によって適用することができる。製剤が石炭全体に均一に適用できるという点において、散布により適用するのが好ましい。特に、製剤の形態が液状であった場合、散布により適用することによって、より石炭全体に均一に製剤が広がり、さらに迅速に滑り防止効果が発揮される。 The method for applying the preparation of the present invention is not particularly limited, but can be applied by spraying, coating, or the like. Application by spraying is preferred in that the formulation can be applied uniformly throughout the coal. In particular, when the form of the preparation is liquid, by applying it by spraying, the preparation spreads more uniformly throughout the coal, and the anti-slip effect is exhibited more quickly.
製剤が液状である場合、製剤が溶媒を含み、製剤の粘度を低減することによって、さらに、迅速に石炭に製剤が適用される。このような溶媒として、水、プロピレングリコール、イソプロピルアルコール等が挙げられる。より粘度を低減させるためには、溶媒は水であるのが好ましい。 If the formulation is in liquid form, the formulation contains a solvent, and the formulation is more quickly applied to coal by reducing the viscosity of the formulation. Examples of such a solvent include water, propylene glycol, isopropyl alcohol and the like. In order to further reduce the viscosity, the solvent is preferably water.
本発明の製剤が液状である場合、製剤中に含まれるジアルキルスルホコハク酸等の化合物は、上記溶媒によって希釈せずに使用してもよく、希釈して使用してもよい。水等で希釈した場合、製剤の粘度を低減することができるので、１．５倍以上の希釈倍率で希釈するのが好ましい。ただし、水で希釈する場合、３倍より高いと付着水分を石炭に与えることにより、滑り促進効果が低減する。従って、水で希釈する場合、希釈倍率は３倍以下であることは、滑り促進効果の低減を防止できるという点において好ましい。また、本発明の製剤が粉状である場合、溶媒に溶解して用いてもよい。 When the preparation of the present invention is liquid, a compound such as dialkylsulfosuccinic acid contained in the preparation may be used without being diluted with the above solvent, or may be used after being diluted. When diluted with water or the like, the viscosity of the preparation can be reduced. Therefore, it is preferable to dilute at a dilution ratio of 1.5 times or more. However, when diluting with water, if it is higher than 3 times, the adhesion promoting effect is reduced by giving the adhering moisture to the coal. Therefore, when diluting with water, it is preferable that the dilution factor is 3 times or less in terms of preventing the reduction of the slip promoting effect. Moreover, when the formulation of this invention is a powder form, you may melt | dissolve in a solvent and use it.
本発明の製剤は、ジアルキルスルホコハク酸等の滑り促進効果を有するものの他、従来の公知の成分を含んでもよく、例えば、消泡剤、防錆剤等を含んでもよい。 The preparation of the present invention may contain conventionally known components in addition to those having a slip promoting effect such as dialkylsulfosuccinic acid, and may contain, for example, an antifoaming agent, a rust preventive agent and the like.
石炭に含まれる水分は付着水分と、包蔵水分がある。これら水分の関係は、以下の関係にある。
［全水分］＝［付着水分］＋［包蔵水分］
The moisture contained in coal includes adhering moisture and embedded moisture. These moisture relationships are as follows.
[Total moisture] = [Adhesive moisture] + [Built-in moisture]
全水分とは、ＪＩＳ Ｍ８８２０（石炭類及びコークス類 ロットの全水分測定方法）に記載の測定値であり、これに準拠して測定した石炭水分を示す。包蔵水分とはＪＩＳ Ｍ８８０３（ハードコール 包蔵水分測定方法）に記載の測定値であり、９６〜９７％相対湿度の雰囲気中に静置し、その湿度と平衡に達した時、その試料が含有する水分である。 The total moisture is a measured value described in JIS M8820 (a method for measuring total moisture of coals and cokes lots), and indicates coal moisture measured according to this. The stored moisture is a measured value described in JIS M8803 (hard call stored moisture measurement method), which is stored in an atmosphere of 96 to 97% relative humidity, and the sample contains when it reaches equilibrium with the humidity. It is moisture.
石炭の水分が上がると詰まり等が発生しやすくなるが、通常は全水分の測定に準拠した方法で石炭の水分を測定しており、対象となる石炭種によっては同じ全水分でも詰まりを引き起こしやすい石炭もあれば、詰まりを起こさない石炭もある。これは、全水分が包蔵水分の影響を受けることに起因し、石炭種によっては包蔵水分の多い石炭があり、特に炭素含有量の少ない亜瀝性炭等は包蔵水分が高い等の理由によるものである。つまり、石炭に含まれる全水分は高くても、そのうちの包蔵水分が高ければ、石炭の詰まりは発生し難い場合がある。 Clogging is likely to occur when the moisture of the coal rises, but usually the moisture of the coal is measured by a method based on the total moisture measurement, and depending on the target coal type, clogging is likely to occur even with the same total moisture. Some coals do not cause clogging. This is due to the fact that the total moisture is affected by the stored moisture, and depending on the type of coal, there is a coal with a large amount of stored moisture. Especially, subalcoholic coal with a low carbon content has a high stored moisture. It is. That is, even if the total moisture contained in the coal is high, clogging of the coal may be difficult to occur if the moisture content is high.
しかし、石炭の詰まりに特に関係するのは石炭粒子の表面に存在する付着水分である。また、石炭に含まれる付着水分は、６質量％より低いと詰まりは発生し難く、６質量％以上であると石炭の詰まりが発生しやすい。よって、本発明は、石炭の付着水分を検出し、その結果に基づいて、石炭の詰まりの発生しやすさの程度を評価することができる。なお、本発明において、検出とは、測定又は把握を意味する。 However, it is the attached moisture present on the surface of the coal particles that is particularly related to the clogging of the coal. Further, when the adhering moisture contained in the coal is lower than 6% by mass, clogging hardly occurs, and when it is 6% by mass or more, clogging of coal tends to occur. Therefore, this invention can detect the adhesion water | moisture content of coal, and can evaluate the grade of the ease of generating clogging of coal based on the result. In the present invention, detection means measurement or grasping.
また、本発明によれば、石炭に含まれる付着水分を測定し、付着水分が６質量％以上であることを把握してから、本発明の製剤の適用をすることによって、付着水分が６質量％より低い場合の製剤の適用を省くことができ、効率的に石炭の詰まりを防止することができる。すなわち、本発明によれば、石炭に含まれる付着水分を検出し、その結果に基づいて製剤の適用を行うことができ、これによって、効率的な石炭の詰まりの防止が可能である。 In addition, according to the present invention, the moisture content contained in coal is measured, and it is understood that the moisture content is 6% by mass or more. Application of the formulation when it is lower than% can be omitted, and clogging of coal can be efficiently prevented. That is, according to the present invention, it is possible to detect adhering moisture contained in coal and apply the preparation based on the result, thereby efficiently preventing clogging of coal.
石炭に含まれる付着水分の上昇に伴って、石炭の詰まりが発生しやすくなる傾向にあるため、６〜１０質量％である間における付着水分の増減に応じて、製剤の適用する量を増減させるのが好ましい。 As the amount of water adhering to coal increases, coal clogging tends to occur easily. Therefore, the amount to which the preparation is applied is increased or decreased depending on the amount of water adhering while the amount is 6 to 10% by mass. Is preferred.
製剤の適用量の増減は、付着水分の値に完全又は不完全に依存すればよい。すなわち、付着水分の値の変化に対し、完全に連続して適用量を変化させてもよいが、製剤の適用量の範囲を１又は２以上に区画化し、製剤の適用量の値が異なる区画に移った場合にのみ、適用量を変化させてもよい。例えば、付着水分の値が所定範囲の下限を下回り又は上限を超えた場合にのみ、適用量を増加又は減少させ、付着水分の値が所定範囲内にある場合には適用量を一定にしてもよい。このような区画化は、適用量の調節制御を簡素化できる点で好ましい。 The increase / decrease of the application amount of the preparation may be completely or incompletely dependent on the value of the adhered moisture. That is, the application amount may be changed completely continuously with respect to the change in the value of adhering moisture, but the range of the application amount of the preparation is divided into 1 or 2 or more, and the values of the application amount of the preparation are different. The application amount may be changed only when moving to. For example, the applied amount is increased or decreased only when the adhering moisture value falls below or exceeds the lower limit of the predetermined range, and when the adhering moisture value is within the predetermined range, the applied amount is made constant. Good. Such partitioning is preferable in that the adjustment control of the application amount can be simplified.
付着水分は、全水分と包蔵水分とを測定し、これらの値に基づいて測定してもよい。包蔵水分の値は略一定であるため、包蔵水分は事前に測定しておくことが可能である。従って、包蔵水分を事前に測定しておくことによって、包蔵水分をその都度測定する必要はなくなり、全水分を測定するだけで、付着水分を測定することができる。全水分を測定する方法は、特に限定されないが、オンラインの石炭水分計の数値を用いて全水分を測定することによって、事前に測定した包蔵水分の値と併せて、付着水分を迅速に測定することができる。
Adhering moisture, and measuring the total water fraction and occluded water, it may be measured based on these values. Since the value of the stored moisture is substantially constant, the stored moisture can be measured in advance. Therefore, by measuring the stored moisture in advance, it is not necessary to measure the stored moisture each time, and the attached moisture can be measured only by measuring the total moisture. The method of measuring the total moisture is not particularly limited, but by measuring the total moisture using the value of the online coal moisture meter, the attached moisture is quickly measured together with the pre-measured value of the stored moisture. be able to.
製剤の適用場所は、特に限定されないが、石炭と製剤が混合されやすい箇所が好ましい。このような箇所としては、ベルトコンベアーの乗り継ぎ部分、石炭を混合する作用のある設備の前等が挙げられる。 The application place of the preparation is not particularly limited, but a place where coal and the preparation are easily mixed is preferable. Examples of such a location include a transfer portion of a belt conveyor, a front of equipment having an action of mixing coal, and the like.
＜石炭の詰まりやすさの評価方法＞
本発明は、石炭に含まれる付着水分に基づいて、石炭の詰まりやすさを評価する方法も包含する。
<Evaluation method for ease of clogging of coal>
The present invention also includes a method for evaluating the ease of clogging of coal based on the adhered moisture contained in the coal.
石炭に含まれる付着水分は、上述の通り、石炭の詰まりやすさと密接に関係しているので、石炭に含まれる付着水分に基づいて、石炭の詰まりやすさを評価することが可能である。 Since the adhesion moisture contained in coal is closely related to the ease of clogging of coal, as described above, the ease of clogging of coal can be evaluated based on the adhesion moisture contained in coal.
石炭の詰まりやすさの評価方法は、石炭に含まれる付着水分に基づけば、特に限定されない。例えば、石炭に含まれる付着水分を検出し、その結果に基づいて、石炭の詰まりやすさを評価することができる。上述の通り、石炭に含まれる付着水分が６質量％より低いと、石炭の詰まりが発生しにくく、石炭に含まれる付着水分が６質量％以上であると石炭の詰まりが発生しやすい。 The evaluation method of the ease of clogging of coal is not particularly limited as long as it is based on the attached moisture contained in the coal. For example, adhering moisture contained in coal can be detected, and the ease of clogging of coal can be evaluated based on the result. As described above, when the adhering moisture contained in coal is lower than 6% by mass, clogging of coal is difficult to occur, and when the adhering moisture contained in coal is 6% by mass or more, clogging of coal is likely to occur.
石炭の詰まりやすさを評価することによって、石炭に適用する製剤を選択することが可能である。選択される製剤は、特に限定されないが、例えば、石炭に含まれる付着水分を検出し、石炭に含まれる付着水分が６〜１０質量％であるときは、ジアルキルスルホコハク酸及び／又はその塩、アルカンスルホン酸及び／又はその塩、ポリオキシエチレンアルキルエーテル硫酸塩及び／又はそのトリエタノールアミン塩ならびにポリオキシアルキレンアルキルエーテルからなる群から選択される１種以上を含む製剤を用いてよい。また、付着水分が１０質量％以上であるときは、これらとは別の化合物を含む製剤を用いてもよい。 By evaluating the ease of clogging of coal, it is possible to select a formulation to be applied to coal. The formulation to be selected is not particularly limited. For example, when the adhering moisture contained in coal is detected and the adhering moisture contained in coal is 6 to 10% by mass, dialkylsulfosuccinic acid and / or salt thereof, alkane A preparation containing at least one selected from the group consisting of sulfonic acid and / or a salt thereof, polyoxyethylene alkyl ether sulfate and / or triethanolamine salt thereof, and polyoxyalkylene alkyl ether may be used. Further, when the adhering moisture is 10% by mass or more, a preparation containing a compound different from these may be used.
以下の方法で、振動させたホッパーから、一定量の石炭が排出されるまでの時間を測定し、石炭の詰まり易さを確認した。 The time until a certain amount of coal was discharged from the vibrated hopper was measured by the following method, and the ease of clogging of the coal was confirmed.
まず、ホッパーとして、ステンレス製で四角錐の形状をしたものを作成した。そのホッパーの寸法を図１に示す。排出部の角度は６０°とした。ホッパーは電動篩装置（ニットー 電動ふるい ＡＮＦ−３０）に取り付け、ホッパー全体が振動するように設置した。石炭はＡ、Ｂ、Ｃと包蔵水分の異なる三種類を準備し、−２ｍｍ粒度に調整したものを用いた。石炭の全水分及び包蔵水分の測定はＪＩＳに準拠して行い、全水分はＪＩＳ Ｍ８８２０（石炭類及びコークス類 ロットの全水分測定方法）、包蔵水分はＪＩＳ Ｍ８８０３（ハードコール 包蔵水分測定方法）に準拠した。水分の調整は、３０℃で湿度を９７％の相対湿度中に１週間静置したあとで、石炭重量に対して必要な水分を霧吹きで散布し、１分間混合したものを使用した。石炭は１１００ｇ準備し、製剤を散布した後はスコップで１分間混合した。ホッパー内にはスパーテルで石炭重量１０００gを挿入した。このとき、ホッパー排出口を閉じ、また、石炭の嵩密度を安定させるため、排出口は閉じたまま５秒間振動を加えた。次に、振動を与えると同時に排出口を開け、全ての石炭が排出されるまでの時間を測定した。製剤としては、アルカンスルホン酸ナトリウム、ジオクチルスルホコハク酸ナトリウム、ポリオキシアルキレンアルキルエーテル硫酸塩、ポリオキシアルキレンアルキルエーテル、ジデシルジメチルアンモニウムクロライド、ラウリルジメチルベタイン、ドデシルベンゼンスルホン酸ナトリウムのいずれかを含み、水で２倍希釈したものを用いた。ただし、ジオクチルスルホコハク酸ナトリウムに関しては原液のまま製剤として添加した。その結果を表１、表２に示す。 First, a hopper made of stainless steel with a quadrangular pyramid shape was created. The dimensions of the hopper are shown in FIG. The angle of the discharge part was 60 °. The hopper was attached to an electric sieve device (Nitto Electric Sieve ANF-30) and installed so that the entire hopper vibrated. Three types of coal with different moisture contents from A, B, and C were prepared, and those adjusted to a particle size of -2 mm were used. Measurement of total moisture and stored moisture of coal is performed in accordance with JIS. Total moisture is measured according to JIS M8820 (method for measuring total moisture in coal and coke lots), and stored moisture is measured according to JIS M8803 (method for measuring hard moisture stored in coal). Compliant. The moisture was adjusted by leaving it to stand at 30 ° C. in a relative humidity of 97% for 1 week, then spraying the moisture necessary for the coal weight by spraying and mixing for 1 minute. 1100 g of coal was prepared, and after spraying the preparation, it was mixed for 1 minute with a scoop. 1000 g of coal weight was inserted into the hopper with a spatula. At this time, in order to close the hopper discharge port and stabilize the bulk density of coal, vibration was applied for 5 seconds with the discharge port closed. Next, at the same time as applying vibration, the discharge port was opened, and the time until all the coal was discharged was measured. The preparation includes sodium alkanesulfonate, sodium dioctylsulfosuccinate, polyoxyalkylene alkyl ether sulfate, polyoxyalkylene alkyl ether, didecyldimethylammonium chloride, lauryldimethylbetaine, sodium dodecylbenzenesulfonate, water, 2 times diluted with was used. However, dioctyl sodium sulfosuccinate was added as a formulation as a stock solution. The results are shown in Tables 1 and 2.
石炭種としてＡ〜Ｃのいずれかを用い、付着水分が６質量％より低い石炭を用いた比較例１、５、９、１３、１５、１７については、製剤中に化合物を含んでいても、含んでいなくても、排出時間が短いことが確認された。この結果より、石炭の付着水分が６質量％より低いと、石炭種や製剤の添加の有無に関わらず、石炭の詰まりが発生しにくいことが示唆された。 For Comparative Examples 1, 5, 9, 13, 15, and 17 using any of A to C as the coal type and using coal having a moisture content lower than 6% by mass, even if the compound is included in the preparation, Even if it was not included, it was confirmed that the discharge time was short. From this result, it was suggested that when the adhesion moisture of coal is lower than 6% by mass, clogging of coal hardly occurs regardless of the presence or absence of addition of coal type or preparation.
製剤を用いず、石炭の付着水分が１０質量％より高い比較例２〜４（石炭種Ａ）、比較例６〜８（石炭種Ｂ）、比較例１０〜１２（石炭種Ｃ）については、いずれも排出時間が１０秒以上であり、石炭の詰まりが十分に抑制されないことが確認された。石炭の付着水分が１２質量％であり、化合物としてアルカンスルホン酸ナトリウムを用いた比較例１４（石炭種Ａ）、１６（石炭種Ｂ）、１８（石炭種Ｃ）は、排出時間が３０秒以上であり、石炭の詰まりが抑制されないことが確認された。石炭の付着水分が１０質量％であり、製剤に含まれる化合物としてジデシルジメチルアンモニウムクロライドを用いた比較例１９（石炭種Ａ）、ラウリルジメチルベタインを用いた比較例２０（石炭種Ａ）、ドデシルベンゼンスルホン酸ナトリウムを用いた比較例２１（石炭種Ａ）は、排出時間が１５秒以上であり、石炭の詰まりが十分に抑制されないことが確認された。これらに対し、製剤に含まれる化合物として、アルカンスルホン酸ナトリウム、ジオクチルスルホコハク酸ナトリウム、ポリオキシアルキレンアルキルエーテル硫酸塩、ポリオキシアルキレンアルキルエーテルのいずれかを用い、石炭種としてＡ〜Ｃのいずれかを用い、付着水分が６〜１０質量％である石炭に製剤を添加した実施例１〜９は、いずれも排出時間が１０秒以下であり、石炭の詰まりが抑制されたことが確認された。 For Comparative Examples 2 to 4 (Coal Species A), Comparative Examples 6 to 8 (Coal Species B), and Comparative Examples 10 to 12 (Coal Species C), in which the adhesion moisture of coal is higher than 10% by mass without using a formulation, In either case, the discharge time was 10 seconds or more, and it was confirmed that clogging of coal was not sufficiently suppressed. In Comparative Examples 14 (Coal Species A), 16 (Coal Species B), and 18 (Coal Species C) using 12% by mass of coal adhering water and sodium alkanesulfonate as a compound, the discharge time is 30 seconds or more. It was confirmed that clogging of coal was not suppressed. Comparative Example 19 (coal species A) using didecyldimethylammonium chloride as a compound contained in the formulation, with coal adhering moisture of 10% by mass, Comparative Example 20 (coal species A) using lauryldimethylbetaine, dodecyl In Comparative Example 21 (Coal Species A) using sodium benzenesulfonate, the discharge time was 15 seconds or more, and it was confirmed that clogging of coal was not sufficiently suppressed. On the other hand, as a compound contained in the preparation, any of sodium alkane sulfonate, sodium dioctyl sulfosuccinate, polyoxyalkylene alkyl ether sulfate, polyoxyalkylene alkyl ether is used, and any one of A to C is used as a coal type. In Examples 1 to 9, in which the formulation was added to coal with a moisture content of 6 to 10% by mass, the discharge time was 10 seconds or less, and it was confirmed that clogging of coal was suppressed.
この結果より、付着水分が１０質量％以上であれば、石炭種に関わらず、製剤を添加しても石炭の詰まりが抑制されないことが示唆された。また、付着水分が１０質量％以下であった場合、ジデシルジメチルアンモニウムクロライド、ラウリルジメチルベタイン又はドデシルベンゼンスルホン酸ナトリウムの添加によっても、石炭種に関わらず、石炭の詰まりが抑制されないことが示唆された。すなわち、この結果より、石炭の詰まりを抑制するには、アルカンスルホン酸ナトリウム、ジオクチルスルホコハク酸ナトリウム、ポリオキシアルキレンアルキルエーテル硫酸塩又はポリオキシアルキレンアルキルエーテルのいずれかを用いる必要があり、さらにこれらを付着水分が６〜１０質量％である石炭に適用することで、石炭種に関わらず、石炭の詰まりを抑制することが示唆された。また、実施例と比較例の結果を参酌すると、石炭詰まりの発生しやすさは、全水分量の値に依存せず、付着水分の値に依存することが示された。 From this result, it was suggested that if the adhering moisture is 10% by mass or more, clogging of coal is not suppressed even if the preparation is added regardless of the type of coal. In addition, when the adhering moisture is 10% by mass or less, it is suggested that addition of didecyldimethylammonium chloride, lauryldimethylbetaine or sodium dodecylbenzenesulfonate does not suppress clogging of coal regardless of the type of coal. It was. That is, from this result, in order to suppress the clogging of coal, it is necessary to use any one of sodium alkane sulfonate, sodium dioctyl sulfosuccinate, polyoxyalkylene alkyl ether sulfate or polyoxyalkylene alkyl ether. It was suggested that by applying to coal having a moisture content of 6 to 10% by mass, clogging of coal is suppressed regardless of the type of coal. Further, when considering the results of Examples and Comparative Examples, it was shown that the ease of occurrence of coal clogging does not depend on the value of the total water content, but on the value of attached moisture.
また、付着水分が６〜１０質量％である石炭に、アルカンスルホン酸ナトリウム等を含む製剤を適用することのみで、石炭の詰まりを抑制できることから、過剰な設備投資を必要とせず、簡便かつ経済的に石炭の詰まりを抑制できることが示された。 In addition, since coal clogging can be suppressed only by applying a formulation containing sodium alkanesulfonate, etc., to coal with a moisture content of 6 to 10% by mass, no excessive capital investment is required, and it is simple and economical. In particular, it was shown that coal clogging can be suppressed.
Claims (2)
前記製剤の適用は、前記石炭の付着水分を検出し、前記石炭の付着水分が６〜１０質量％の場合に、前記石炭に散布又は塗布により行う、石炭搬送方法。 Dialkylsulfosuccinic acid and / or a salt thereof, alkanesulfonic acid and / or a salt thereof, polyoxyethylene alkyl ether sulfate and / or a triethanolamine salt thereof, and a polyoxyalkylene on coal containing 6 to 10% by mass of adhering moisture A method for transporting coal, comprising a step of applying a preparation containing one or more selected from the group consisting of alkyl ethers ,
The said formulation is a coal conveyance method which detects the adhesion water | moisture content of the said coal, and when the adhesion water | moisture content of the said coal is 6-10 mass%, it sprays or apply | coats to the said coal .
The deposition detection of moisture, the total water and occluded water contained in the coal is measured, coal transport method of claim 1 carried out on the basis of the measured value.
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| EP4134411A4 (en) * | 2020-04-09 | 2024-04-17 | Kurita Water Industries Ltd. | Method for modifying mineral raw material |
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| JP7445385B2 (en) * | 2019-01-31 | 2024-03-07 | 太平洋セメント株式会社 | Method for suppressing dust generation and solidification or fluidization of coal ash |
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| JPS5811915B2 (en) * | 1978-08-02 | 1983-03-05 | 栗田工業株式会社 | Lubricant for coking coal for coke production |
| JPS56100892A (en) * | 1980-01-17 | 1981-08-13 | Nippon Oil & Fats Co Ltd | Bulk density enhancing agent of stock coal for preparing coke |
| JP2808131B2 (en) * | 1989-05-02 | 1998-10-08 | タイホー工業株式会社 | Coal treatment agent |
| JP3551487B2 (en) * | 1994-09-16 | 2004-08-04 | Ｊｆｅスチール株式会社 | Bulk density management method for coke oven charging coal |
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| EP4134411A4 (en) * | 2020-04-09 | 2024-04-17 | Kurita Water Industries Ltd. | Method for modifying mineral raw material |
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