JP5660761B2 - Coal gasification and fertilizer manufacturing method - Google Patents
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- 239000003337 fertilizer Substances 0.000 title claims description 41
- 239000003245 coal Substances 0.000 title claims description 40
- 238000002309 gasification Methods 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 230000004907 flux Effects 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052785 arsenic Inorganic materials 0.000 claims description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 12
- 239000002956 ash Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000000395 magnesium oxide Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 241000209140 Triticum Species 0.000 description 3
- 235000021307 Triticum Nutrition 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000004720 fertilization Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 241000209504 Poaceae Species 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002881 soil fertilizer Substances 0.000 description 2
- 238000013268 sustained release Methods 0.000 description 2
- 239000012730 sustained-release form Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Description
本発明は、石炭ガス化・肥料製造方法に関し、特に、石炭をガス化する際に生成するスラグを珪酸系肥料等として有効利用する方法に関する。 The present invention relates to a method for producing coal gasification and fertilizer, and more particularly to a method for effectively using slag produced when gasifying coal as silicic acid-based fertilizer.
従来、石炭をガス化する際に生じる廃棄物を珪酸系肥料として有効利用するため、溶融塩を利用して石炭をガス化するにあたり、カリウムを含む溶融塩を使用し、溶融塩中のカリウムと石炭の灰分中の珪酸とを結合させる技術が提案されている（特許文献１参照）。 Conventionally, in order to effectively use the waste generated when coal is gasified as silicic acid fertilizer, when coal is gasified using molten salt, molten salt containing potassium is used. A technique for combining silicic acid in coal ash has been proposed (see Patent Document 1).
しかし、上記従来の石炭ガス化方法においては、高温の溶融体に石炭とガス化剤とを吹き込み、高温状態で石炭を酸化してガス化する溶融床ガス化法を用いているため、石炭ガス化装置が複雑かつ大型化し、装置適合性が悪いという問題があった。また、カリウム分にしても単にナトリウムの代替に過ぎず、偶々それがカリ肥料になるというだけで肥料成分の効能に関しての評価がないという問題があった。 However, in the above conventional coal gasification method, coal gas and a gasifying agent are blown into a high-temperature melt, and a molten bed gasification method in which coal is oxidized and gasified at a high temperature state is used. There is a problem that the apparatus is complicated and large, and the compatibility with the apparatus is poor. Moreover, even if it was potassium content, it was only a substitute of sodium, and there existed a problem that there was no evaluation regarding the effect of a fertilizer component only because it became a potash fertilizer accidentally.
そこで、本発明は、上記従来の石炭ガス化方法における問題点に鑑みてなされたものであって、多くの型に適用することができて、装置適合性の高い石炭ガス化・肥料製造方法を提供することを目的とする。 Therefore, the present invention has been made in view of the problems in the above conventional coal gasification method, and can be applied to many types, and a coal gasification / fertilizer manufacturing method with high apparatus compatibility. The purpose is to provide.
上記目的を達成するため、本発明者らは、鋭意研究を重ねた結果、微粉炭を空気等によって搬送して炉内に供給し、高温下で反応させてガス化する噴流床ガス化法と添加フラックス成分の調整を用いることにより、最適な肥料成分の調整を行うことができることを見出し、本発明をなすに至った。 In order to achieve the above object, the present inventors have conducted extensive research, and as a result, a spouted bed gasification method in which pulverized coal is conveyed by air or the like, supplied into the furnace, and reacted and gasified at a high temperature. By using the adjustment of the added flux component, it has been found that the optimum fertilizer component can be adjusted, and the present invention has been made.
すなわち、本発明は、石炭をガス化する噴流床石炭ガス化炉に塩基性成分を含むフラックスを添加し、該フラックスの添加により生成したスラグを珪酸系肥料又は苦土肥料として利用する石炭ガス化・肥料製造方法であって、前記フラックスのＭｇＯ、ＣａＯ、Ｎａ 2 Ｏ及びＫ 2 Ｏ含有率の合量が５４質量％以上であることを特徴とする。これにより、特に小麦・水稲等のイネ科植物に対して肥効が高く、小麦等の根群を発達させ、根の活力を高める作用にも優れた珪酸系肥料等を提供することができる。 That is, the present invention is, coal gas and coal added flux containing a basic component in the entrained flow coal gasifier for gasifying utilizes slag produced by the addition of the flux as silicic fertilizers or magnesia fertilizer The fertilizer manufacturing method is characterized in that the total content of MgO, CaO, Na 2 O and K 2 O in the flux is 54% by mass or more . As a result, it is possible to provide a silicic acid-based fertilizer that has a high fertilizing effect on gramineous plants such as wheat and paddy rice, and that develops root groups such as wheat and is excellent in enhancing the vitality of roots.
また、前記スラグの結晶化率を１０％以上９０％以下とすることができ、これにより、該スラグを粉砕して得られた珪酸系肥料等をク溶性とすることができ、肥効の高い珪酸系肥料等を提供することができる。尚、ク溶性とは、２％クエン酸溶液に溶けるものをいう。 Moreover, the crystallization rate of the slag can be set to 10% or more and 90% or less, whereby the silicate fertilizer obtained by pulverizing the slag can be made soluble and has high fertilization effect. Silicate fertilizers and the like can be provided. The term “solubility” refers to those that are soluble in a 2% citric acid solution.
さらに、前記フラックスのクロム、ヒ素及びホウ素含有率の各々を３００ｐｐｍ以下とすることができ、これにより、該フラックスを用いて生成したスラグを粉砕して得られた珪酸系肥料等のクロム及びヒ素含有率を低減し、環境に配慮した珪酸系肥料を提供することができる。 Furthermore, each of the chromium, arsenic and boron content of the flux can be 300 ppm or less, and thereby, chromium and arsenic content such as silicic acid-based fertilizer obtained by pulverizing slag produced using the flux The rate can be reduced and the silicate fertilizer in consideration for the environment can be provided.
以上のように、本発明によれば、現在、世界の石炭ガス化の主流である噴流床方式に適用することのできる石炭ガス化・肥料製造方法を提供することができる。 As described above, according to the present invention, it is possible to provide a coal gasification / fertilizer manufacturing method that can be applied to the spouted bed system, which is the mainstream of the world's coal gasification.
上述のように、本発明は、石炭ガス化・肥料製造方法であって、石炭をガス化する噴流床石炭ガス化炉にフラックスを添加し、該フラックスの添加により生成したスラグを、主として珪酸系肥料又は苦土肥料として利用することを特徴とする。 As described above, the present invention is a coal gasification and fertilizer manufacturing method, in which a flux is added to a spouted bed coal gasification furnace that gasifies coal, and slag generated by the addition of the flux is mainly silicic acid-based. It is used as a fertilizer or a clay soil fertilizer.
噴流床石炭ガス化炉は、石炭ガス化複合発電設備等に用いられるものであって、図１に示すように、噴流床石炭ガス化炉に、石炭と、ガス化剤と、フラックスを供給し、高圧下で燃焼させ、生成ガスと蒸気を得るものであって、その際に溶融スラグが排出される。石炭ガス化複合発電設備では、前記生成ガスでガスタービンを回転させて発電するとともに、蒸気で蒸気タービンを回転させて発電を行う。ここで、ガス化剤に酸素を用いるのが酸素吹きガス化発電であり、ガス化剤に空気を用いるのが空気吹きガス化発電である。 The spouted bed coal gasification furnace is used in a coal gasification combined power generation facility or the like, and supplies coal, a gasifying agent, and a flux to the spouted bed coal gasification furnace as shown in FIG. The product gas and steam are burned under high pressure, and molten slag is discharged at that time. In the coal gasification combined cycle power generation facility, power is generated by rotating a gas turbine with the generated gas and rotating a steam turbine with steam. Here, oxygen-blown gasification power generation uses oxygen as the gasifying agent, and air-blown gasification power generation uses air as the gasifying agent.
上記噴流床石炭ガス化炉では、炉内に投入するガス化剤空気の量を少なくし、空気比を下げた運転を行うことにより生成ガス発熱量が高くなるなどガス化性能が高くなる。しかし、噴流床石炭ガス化炉では、石炭中の灰分を溶融スラグとして排出させるため、炉内の温度を灰の融点以上になるように運転し、灰融点の高い石炭（高灰融点炭）をガス化する場合には、炉内温度を高温に保つためにガス化剤空気の投入量を増加させて高空気比で運転する。その結果、高灰融点炭ではガス化性能が低下する。 In the spouted bed coal gasification furnace, the gasification performance is enhanced by reducing the amount of gasifying air introduced into the furnace and reducing the air ratio to increase the generated gas heat generation amount. However, in the spouted bed coal gasifier, the ash content in the coal is discharged as molten slag, so the temperature in the furnace is operated to be higher than the melting point of ash, and coal with a high ash melting point (high ash melting point coal) is used. In the case of gasification, operation is performed at a high air ratio by increasing the input amount of the gasifying agent air in order to keep the furnace temperature at a high temperature. As a result, the gasification performance decreases with high ash melting point coal.
そこで、高灰融点炭の灰融点を降下させ、低空気比運転を可能としてガス化性能を高く維持するため、フラックスを炉内に添加する。すなわち、フラックスは、高灰融点炭の灰融点を下げるために添加されるものであって、ＭｇＯ、ＣａＯ、Ｎａ2Ｏ、Ｋ2Ｏ、Ｆｅ2Ｏ3等の塩基性成分を多く含有する。 Therefore, flux is added to the furnace in order to lower the ash melting point of the high ash melting point coal, to enable operation at a low air ratio and to maintain high gasification performance. That is, the flux is added to lower the ash melting point of the high ash melting point coal and contains a large amount of basic components such as MgO, CaO, Na 2 O, K 2 O, Fe 2 O 3 and the like.
ここで、本発明では、上記フラックスが含有するＭｇＯ、ＣａＯ、Ｎａ2Ｏ及びＫ2Ｏの合量を５４質量％以上とすることで、特にイネ科植物に対して肥効の高い珪酸系肥料又は苦土肥料を製造することができる。このようなフラックスとしては、例えば、表１の実施例１〜５に示すようなものが存在する。比較例１〜５は、ＭｇＯ、ＣａＯ、Ｎａ2Ｏ及びＫ2Ｏの合量が５４質量％未満のフラックスであって、これらを用いると、実施例１〜５に示すフラックスを用いた場合に比較して、得られた珪酸系肥料又は苦土肥料の水稲に対する肥効は高くないものの、通常の珪酸系肥料又は苦土肥料として使用することができる。尚、同表中のアルカリ分とは、ＭｇＯ、ＣａＯ、Ｎａ2Ｏ及びＫ2Ｏの合量をいう。 In the present invention, MgO which the flux contains, CaO, With a 54 mass% or more the total amount of Na 2 O and K 2 O, silicic fertilizers particularly high fertilizer efficiency against grasses Or a bitter soil fertilizer can be manufactured. Examples of such a flux include those shown in Examples 1 to 5 in Table 1. Comparative Examples 1 to 5 are fluxes in which the total amount of MgO, CaO, Na 2 O and K 2 O is less than 54% by mass, and when these are used, the flux shown in Examples 1 to 5 is used. In comparison, the silicic acid-based fertilizer or the bituminous fertilizer can be used as a normal silicic acid-based fertilizer or a bituminous fertilizer, although the fertilization effect on paddy rice is not high. The alkali content in the table refers to the total amount of MgO, CaO, Na 2 O and K 2 O.
上記フラックスを用い、石炭を噴流床石炭ガス化炉において高圧下で燃焼させ、生成ガスと蒸気を得るとともに、溶融スラグを排出する。噴流床石炭ガス化炉で生成したスラグは、炉内で１４００℃程度となっているが、このスラグを急冷した後、徐冷し、結晶化率を１０％以上９０％以下とする。次に、冷却されたスラグを粒径１ｍｍ程度に破砕し、表２に示すような組成を有する珪酸系肥料等を得ることができる。尚、スラグを破砕してもよいが、徐放性を発揮させるために顆粒化するので、却って粉砕しなくてよいことが多い。 Using the above flux, coal is burned under high pressure in a spouted bed coal gasifier to obtain product gas and steam, and discharge molten slag. The slag produced in the spouted bed coal gasification furnace is about 1400 ° C. in the furnace. The slag is rapidly cooled and then gradually cooled to a crystallization rate of 10% or more and 90% or less. Next, the cooled slag can be crushed to a particle size of about 1 mm to obtain a silicate fertilizer having a composition as shown in Table 2. In addition, although slag may be crushed, since it granulates in order to exhibit sustained-release property, it is not necessary to grind on the contrary.
表２の実施例２のスラグ（肥料）と、市販の硫酸カリ肥料（比較例）を、径３ｃｍ長さ２０ｃｍのアクリル製パイプに別々に最適充填し、パイプの上方から０．１ｍｍ／ｍｉｎの速度で純水を滴下し、１５分後にパイプの下方より得られた液中のカリウム濃度を比較したところ、実施例の１０ｍｇ／ｌ に対し、硫酸カリ肥料は７２０，０００ｍｇ／ｌにも及び、実施例の肥料で徐放性が確保されていることが確かめられた。 The slag (fertilizer) of Example 2 in Table 2 and a commercially available potassium sulfate fertilizer (comparative example) were optimally filled separately into an acrylic pipe having a diameter of 3 cm and a length of 20 cm, and a speed of 0.1 mm / min from above the pipe. When the potassium concentration in the liquid obtained from the lower part of the pipe was compared after 15 minutes, the potassium sulfate fertilizer reached 720,000 mg / l compared to 10 mg / l in the example. It was confirmed that sustained release was ensured with the fertilizer.
また、上記アクリル製パイプの片方を密封し、表２の実施例２のスラグ（肥料）と、市販の栽培用ゼオライト（比較例）を最適充填し、純水だけをパイプの上端まで充填し、表面に小麦農林６１号の種を３０粒ずつ置いた。このパイプを２０℃の恒温室に置いたところ、両者とも略々５日目に発芽を始めた。２０日目に、実施例では、高さ２０ｃｍに成長し、青汁製造が可能になったのに対し、比較例は最大高さが１５ｃｍに留まった。３０日目で、カウンタにパイプごと移植し、阿蘇産クロボクを充填して、関東地区で屋外に秋から春まで自然降水だけで生育させたところ、実施例では７月に結実するものがあったのに対し、比較例では珪素分が足らないために結実したものはなかった。 In addition, one side of the acrylic pipe is sealed, and the slag (fertilizer) of Example 2 in Table 2 and a commercially available zeolite for comparison (comparative example) are optimally filled, and only pure water is filled to the upper end of the pipe, 30 grains of wheat No. 61 seeds were placed on the surface. When this pipe was placed in a constant temperature room at 20 ° C., both began to germinate on the fifth day. On the 20th day, the example grew to a height of 20 cm, making it possible to produce green juice, while the comparative example remained at a maximum height of 15 cm. On the 30th day, the pipes were transplanted to the counter, filled with Aso-made Kuroboku, and grown outdoors in the Kanto area from autumn to spring alone, with some fruiting in July in the examples. On the other hand, in the comparative example, there was no fruit because there was not enough silicon.
上述のように、本発明で得られた珪酸系肥料は、緩効性であり、雨水等による溶脱が少ないため、環境汚染の虞がなく、肥効が長続きする。また、作物体内のマグネシウム等のミネラル含有率を増加させ、作物の健全化に寄与する。特に、イネ科植物に適用することで、活性根が増加するとともに、食味が向上するという効果も奏する。 As described above, the silicic acid-based fertilizer obtained in the present invention is slow-acting and has little leaching due to rainwater or the like, so there is no risk of environmental contamination and the fertilization effect lasts long. It also contributes to the health of the crop by increasing the content of minerals such as magnesium in the crop body. In particular, by applying to grasses, active roots are increased and the taste is improved.
また、フラックスにクロム、ヒ素及びホウ素の含有率の低いもの、例えば、各々の含有率を３００ｐｐ以下とすることで、珪酸系肥料のクロム、ヒ素及びホウ素の含有率を低下させることができ、環境に配慮した珪酸系肥料を提供することができる。これらの成分、特にホウ素は一部植物の肥効成分であるものの、溶解性がある場合には他の生態系への影響が危惧されるからである。 Moreover, the content of chromium, arsenic and boron in the flux with a low content of chromium, arsenic and boron, for example, by setting each content to 300 pp or less, the content of chromium, arsenic and boron in the silicate fertilizer can be reduced. It is possible to provide a silicic acid-based fertilizer in consideration of the above. This is because some of these components, especially boron, are fertilizing components of plants, but if they are soluble, they may affect other ecosystems.
Claims (3)
ックスの添加により生成したスラグを珪酸系肥料又は苦土肥料として利用する石炭ガス化・肥料製造方法であって、
前記フラックスのＭｇＯ、ＣａＯ、Ｎａ 2 Ｏ及びＫ 2 Ｏ含有率の合量が５４質量％以上で
あることを特徴とする石炭ガス化・肥料製造方法。 This is a coal gasification and fertilizer manufacturing method in which a flux containing a basic component is added to a spouted bed coal gasifier that gasifies coal, and the slag produced by the addition of the flux is used as a silicic acid-based fertilizer or a clay fertilizer. And
The total content of MgO, CaO, Na 2 O and K 2 O in the flux is 54% by mass or more.
Coal gasification and fertilizer production process, characterized in that.
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