阅读说明：本技术 一种复合清洁燃料、其制备方法及应用 (Composite clean fuel, preparation method and application thereof ) 是由 宋华 尹明德 白浩隆 冯强 刘忠攀 杨晓辉 宋瑞领 柏奖枝 王海苗 于 2020-04-22 设计创作，主要内容包括：本发明提供了一种复合清洁燃料、其制备方法及应用,所述的复合清洁燃料包括有机燃料、复合添加剂和粘结剂；其中,所述的有机燃料的质量分数为50～90wt％,所述的复合添加剂和粘结剂的总质量分数为10～50wt％。所述的制备方法包括：有机燃料、复合添加剂和粘结剂按比例混合制成原料浆,原料浆成型干燥后得到所述的复合清洁燃料。本发明提供的复合清洁燃料可作为民用自动化炉具专用燃料,能解决现有民用自动化炉具燃料种类单一、NO<Sub>x</Sub>偏高和燃尽率差等问题。复合清洁燃料的制备工艺简单,不涉及高温过程,制备的复合清洁燃料具有成品强度高,燃烧效果好,环保指标优,经济成本低廉等优点。(The invention provides a composite clean fuel, a preparation method and application thereof, wherein the composite clean fuel comprises an organic fuel and a composite additiveAgents and binders; the organic fuel comprises, by mass, 50-90 wt% of the organic fuel, and the total mass fraction of the composite additive and the binder is 10-50 wt%. The preparation method comprises the following steps: and mixing the organic fuel, the composite additive and the binder in proportion to prepare raw material slurry, and forming and drying the raw material slurry to obtain the composite clean fuel. The composite clean fuel provided by the invention can be used as a special fuel for a civil automatic stove, and can solve the problems that the existing civil automatic stove has single fuel type and NO x Higher and poor burnout. The preparation process of the composite clean fuel is simple, the high-temperature process is not involved, and the prepared composite clean fuel has the advantages of high finished product strength, good combustion effect, excellent environmental protection index, low economic cost and the like.)

1. The composite clean fuel is characterized by comprising an organic fuel, a composite additive and a binder;

the organic fuel comprises, by mass, 50-90 wt% of the organic fuel, and the total mass fraction of the composite additive and the binder is 10-50 wt%.

2. The composite clean fuel as claimed in claim 1, wherein the composite clean fuel comprises the following components by mass percent:

50-90 wt% of organic fuel

7-40 wt% of composite additive

3-10 wt% of binder.

3. The composite clean fuel as claimed in claim 1 or 2, characterized in that the composite clean fuel further comprises water;

preferably, every 100g of raw materials comprises 5-30 ml of water, wherein the raw materials refer to the organic fuel, the composite additive and the binder.

4. The composite clean fuel as claimed in any one of claims 1 to 3, wherein the organic fuel comprises any one or a combination of at least two of bituminous coal, anthracite, semi-coke or biomass;

preferably, the organic fuel comprises biomass and coal, and the coal comprises any one of bituminous coal, anthracite or semi-coke or a combination of at least two of bituminous coal, anthracite and semi-coke;

preferably, the composite additive comprises a main reactant, an oxidizing agent and a decomposition inhibitor;

preferably, the mass ratio of the main reactant to the oxidant to the decomposition inhibitor is (8-17): (2-4): 1;

preferably, the main reactant comprises any one or a combination of at least two of calcium propionate, calcium magnesium acetate, urea, cyanuric acid, calcium hydroxide, calcium carbonate, calcium oxide, strontium carbonate, ferric oxide or ferroferric oxide;

preferably, the oxidant comprises any one or a combination of at least two of potassium permanganate, potassium chlorate or potassium ferrate;

preferably, the decomposition inhibitor comprises any one or a combination of at least two of sodium chloride, potassium carbonate and sodium carbonate;

preferably, the binder comprises any one or a combination of at least two of pregelatinized starch, clay, montmorillonite, attapulgite, bentonite, dextrin or hydroxymethyl cellulose.

5. The composite clean fuel as claimed in any one of claims 1 to 4, wherein the particle size of the organic fuel is in the range of 5 to 400 mesh;

preferably, the particle size range of the composite additive is 35-3000 meshes;

preferably, the particle size range of the binder is 100-400 meshes.

6. The composite clean fuel as claimed in any one of claims 1 to 5, characterized in that the cross section of the composite clean fuel is circular;

preferably, the diameter of the circular section of the composite clean fuel is 3-12 mm;

preferably, the length of the composite clean fuel is 5-100 mm;

preferably, the composite clean fuel is spherical, cylindrical, ellipsoidal or capsule-shaped;

preferably, the capsule shape comprises a cylinder and hemispheres positioned at two ends of the cylinder;

preferably, the composite clean fuel is of a thin sheet structure with a runway-shaped section, and the runway-shaped section is an outer contour formed by a rectangle and semicircles positioned at the short sides of the rectangle;

preferably, the thickness of the sheet structure is 3-12 mm;

preferably, the width of the sheet structure is 3-12 mm;

preferably, the length of the sheet structure is 5-100 mm.

7. A preparation method of the composite clean fuel as claimed in any one of claims 1 to 6, characterized in that the organic fuel, the composite additive and the binder are mixed according to a proportion to prepare raw material slurry, and the raw material slurry is formed and dried to obtain the composite clean fuel.

8. The preparation method according to claim 7, wherein the preparation method specifically comprises the following steps:

weighing the organic dye, the composite additive and the binder in proportion, preferentially mixing the organic fuel and the composite additive, adding water and the binder in the mixing process, uniformly stirring to obtain raw material slurry, and forming and drying the raw material slurry to obtain the composite clean fuel;

preferably, the forming process is carried out in a forming device;

preferably, the molding device comprises an extrusion device or a ring rolling device;

preferably, the drying temperature is 200-300 ℃;

preferably, the drying time is 20-30 min.

9. The method according to claim 7 or 8, wherein the organic fuel comprises any one or a combination of at least two of bituminous coal, anthracite, semi-coke or biomass;

preferably, the organic fuel comprises biomass and coal, and the coal comprises any one of bituminous coal, anthracite or semi-coke or a combination of at least two of bituminous coal, anthracite and semi-coke;

preferably, the mass fraction of the organic fuel is 50-90 wt%;

preferably, the particle size range of the organic fuel is 5-400 meshes;

preferably, the composite additive comprises a main reactant, an oxidizing agent and a decomposition inhibitor;

preferably, the mass ratio of the main reactant to the oxidant to the decomposition inhibitor is (8-17): (2-4): 1;

preferably, the main reactant comprises any one or a combination of at least two of calcium propionate, calcium magnesium acetate, urea, cyanuric acid, calcium hydroxide, calcium carbonate, calcium oxide, strontium carbonate, ferric oxide or ferroferric oxide;

preferably, the oxidant comprises any one or a combination of at least two of potassium permanganate, potassium chlorate or potassium ferrate;

preferably, the decomposition inhibitor comprises any one or a combination of at least two of sodium chloride, potassium carbonate and sodium carbonate;

preferably, the mass fraction of the composite additive is 7-40 wt%;

preferably, the particle size range of the composite additive is 35-3000 meshes;

preferably, the binder comprises any one or a combination of at least two of pregelatinized starch, clay, montmorillonite, attapulgite, bentonite, dextrin or hydroxymethyl cellulose;

preferably, the mass fraction of the binder is 3-10 wt%;

preferably, the particle size range of the binder is 100-400 meshes;

preferably, 5-30 ml of water is added into each 100g of raw materials, wherein the raw materials refer to the organic fuel, the composite additive and the binder.

10. The use of the composite clean fuel as claimed in any one of claims 1 to 6, wherein the composite clean fuel is used in civil automation furnaces.

Technical Field

The invention belongs to the technical field of fuel manufacturing, relates to a composite clean fuel, a preparation method and application thereof, and particularly relates to a composite clean fuel for a civil automatic stove, a preparation method and application thereof.

Background

In the field of civil clean heating, as a bottom-holding technical measure besides 'coal changes gas' and 'coal changes electricity', an automatic stove has become one of the mainstream ways for guaranteeing the heating of residents. However, the existing automatic stoves have many restriction factors in development, and particularly, there are many problems in fuel, such as: the fuel has single type, mainly including biomass, semi-coke and anthracite. The fuel has high characteristic requirements, the semi-coke and the anthracite need to meet the index requirements of nitrogen content less than or equal to 0.9 percent, ash content less than or equal to 15 percent and sulfur content less than 0.3 percent, the biomass mainly comprises raw materials such as pinus sylvestris, sawdust, wood and the like, the nitrogen content is less than or equal to 0.3 percent, and the ash content is less than or equal to 5 percent. The fuel cost is higher, the prices of high-quality biomass, semi-coke and anthracite are more than one time higher than that of the traditional bituminous coal for heating, and the economic pressure of users is high. The three fuels have low available amount, the annual output of the high-quality forest resources available in China is only 3 hundred million tons, and the three fuels are difficult to be fully used for civil use. The semi-coke and anthracite belong to scarce resources, the demand of the industrial field is large, and resources which can be used for civil use are limited.

China has rich coal, lean oil and less gas resources, and the reserves of coal resources are rich, wherein the coal resources are mainly bituminous coal resources and account for more than 70 percent of the total. In the civil field, bituminous coal is a main energy form for warming urban and rural residents in China. Meanwhile, China is a big world of agriculture, the annual yield of crop straws reaches 10 hundred million tons, and resources are extremely rich. Therefore, the energy form using bituminous coal and crop straws as main fuel sources is a necessary requirement for the development of automatic stoves under the existing resource pattern in China. However, the physical and chemical indexes of bituminous coal and crop straws are poor, such as: the nitrogen content of the smoke coal is far higher than that of high-quality biomass, semi-coke and anthracite, and the smoke coal is mainly low, medium and high sulfur coal with the sulfur content of more than 0.5 percent. The crop straws of China mainly comprise corn straws and wheat straws, the nitrogen content is more than 1 percent, the ash content is more than 10 percent, the sulfur content is more than or equal to 0.1 percent, and the alkali metal content is higher.

CN103923719B discloses a composite solid fuel, which comprises anthracite, biomass and auxiliary materials, and the preparation method sequentially comprises the following steps: (1) and crushing: crushing the smokeless coal, and grinding the biomass; (2) and fermenting: performing steam fermentation on the ground biomass powder at the temperature of over 60 ℃ for 22-26 hours; (3) and baking: fermenting the biomass powder and then feeding the fermented biomass powder into a dryer for drying; (4) and stirring: adding the crushed anthracite, the fermented and baked biomass powder, the corn starch and water into a container, and uniformly stirring; (5) retting: the evenly stirred mixture is settled into a material tank and retted for 10 to 12 hours at normal temperature; (6) and forming: after the retting is finished, the mixture is pressed by a machine and then is formed in one step; (7) and (3) drying: and drying the formed finished product to obtain the composite solid fuel.

CN105316057A discloses a biomass briquette using anthracite and carbonized biomass fuel as base materials, which comprises the following raw materials in parts by weight: 49-59% of anthracite, 30-36% of carbonized biomass fuel powder, 0.5-12% of combustion improver and 9-14% of binder; the carbonized biomass fuel powder comprises the following raw materials in parts by weight, and is prepared by carbonization: 50-72 parts of eucalyptus bark, 15-20 parts of pine branches, 15-20 parts of straws, 5-8 parts of corncobs, 15-20 parts of corn stalks and 15-20 parts of soybean stalks.

CN108456577A discloses a bituminous coal fuel containing biomass and a preparation method thereof. The bituminous coal fuel comprises bituminous coal, straw, stems, stalks, peat, and biomass alcohol. Preferably, the bituminous fuel comprises the following components by weight: 100-300 parts of bituminous coal, 10-65 parts of straw, 20-35 parts of tree stem, 5-20 parts of straw, 5-20 parts of peat and 10-50 parts of biomass alcohol.

In the field of civil automatic furnaces, when single bituminous coal or crop straws are directly combusted, black smoke is emitted, the concentration of CO is high, coking is easy to occur, and NO is generated_x、SO₂The problems of environmental protection and the like are difficult to meet, mature bituminous coal and crop straw fuel products are not available at home and abroad, and the fuel application of the bituminous coal and the crop straw in the civil intelligent heating field is severely restricted. Therefore, the invention develops the composite clean fuel taking the bituminous coal and the crop straws as the main raw materials, and can fill the technical blank in the field of domestic and domestic automatic stove fuels.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a composite clean fuel, a preparation method and application thereof_xHigher and poor burnout. The preparation process of the composite clean fuel is simple, the high-temperature process is not involved, and the prepared composite clean fuel has the advantages of high finished product strength, good combustion effect, excellent environmental protection index and economic costLow cost and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a composite clean fuel comprising an organic fuel, a composite additive, and a binder.

The organic fuel comprises, by mass, 50-90 wt% of the organic fuel, and the total mass fraction of the composite additive and the binder is 10-50 wt%.

The composite clean fuel provided by the invention can be used as a special fuel for a civil automatic stove, and can solve the problems that the existing civil automatic stove has single fuel type and NO_xHigher and poor burnout. The preparation process of the composite clean fuel is simple, the high-temperature process is not involved, and the prepared composite clean fuel has the advantages of high finished product strength, good combustion effect, excellent environmental protection index, low economic cost and the like.

The mass fraction of the organic fuel may be 50 wt%, 52 wt%, 54 wt%, 56 wt%, 58 wt%, 60 wt%, 62 wt%, 64 wt%, 66 wt%, 68 wt%, 70 wt%, 72 wt%, 74 wt%, 76 wt%, 78 wt%, 80 wt%, 82 wt%, 84 wt%, 86 wt%, 88 wt%, or 90 wt%, and the total mass fraction of the composite additive and the binder may be 10 wt%, 12 wt%, 14 wt%, 16 wt%, 18 wt%, 20 wt%, 22 wt%, 24 wt%, 26 wt%, 28 wt%, 30 wt%, 32 wt%, 34 wt%, 36 wt%, 38 wt%, 40 wt%, 42 wt%, 44 wt%, 46 wt%, 48 wt%, or 50 wt%, although not limited to the recited values, and other non-recited values within the range are equally applicable.

As a preferable technical scheme of the invention, the composite clean fuel comprises the following components in percentage by mass:

50-90 wt% of organic fuel

7-40 wt% of composite additive

3-10 wt% of binder.

For example, the mass fraction of the organic fuel may be 50 wt%, 52 wt%, 54 wt%, 56 wt%, 58 wt%, 60 wt%, 62 wt%, 64 wt%, 66 wt%, 68 wt%, 70 wt%, 72 wt%, 74 wt%, 76 wt%, 78 wt%, 80 wt%, 82 wt%, 84 wt%, 86 wt%, 88 wt%, or 90 wt%, the mass fraction of the additive package may be 7 wt%, 10 wt%, 12 wt%, 14 wt%, 16 wt%, 18 wt%, 20 wt%, 22 wt%, 24 wt%, 26 wt%, 28 wt%, 30 wt%, 32 wt%, 34 wt%, 36 wt%, 38 wt%, or 40 wt%, and the mass fraction of the binder may be 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, or 10 wt%, but is not limited to the recited values, and other non-recited values within the recited values are equally applicable.

As a preferable technical scheme of the invention, the composite clean fuel also comprises water.

Preferably, 5-30 ml of water is included in each 100g of raw materials, wherein raw materials refer to the organic fuel, the composite additive and the binder, for example, 5ml of water, 6ml of water, 8ml of water, 10ml of water, 12ml of water, 14ml of water, 16ml of water, 18ml of water, 20ml of water, 22ml of water, 24ml of water, 26ml of water, 28ml of water or 30ml of water is included in each 100g of raw materials, but the method is not limited to the recited values, and other values not recited in the range of the recited values are also applicable.

In a preferred embodiment of the present invention, the organic fuel includes any one or a combination of at least two of bituminous coal, anthracite coal, semi-coke or biomass, such as a combination of bituminous coal and anthracite coal, a combination of anthracite coal and semi-coke, a combination of semi-coke and biomass, a combination of bituminous coal and semi-coke or a combination of bituminous coal and biomass, but is not limited to the listed combinations, and any combination within the category is also applicable.

Preferably, the organic fuel comprises biomass and coal, and the coal comprises any one of bituminous coal, anthracite or semi-coke or a combination of at least two of the bituminous coal, the anthracite and the semi-coke.

In the invention, bituminous coal, anthracite, semi-coke and biomass are used as main raw materials, so that the cost is low, the source is wide, and powder solid waste resources generated in coal mines, biomass processing plants and the like can be utilized, thereby reducing the raw material cost and the crushing cost of organic fuels. More preferably, the present invention, the organic fuel is defined to include biomass,after the biomass is combined with the coal, a reductive red carbon layer is formed after the coal is volatilized and analyzed, which is beneficial to NO generated by biomass combustion_xReduction to N₂The biomass is beneficial to reducing the ignition point of coal and reducing the ignition time of fuel.

Preferably, the complex additive comprises a main reactant, an oxidizing agent and a decomposition inhibitor.

In the invention, the composite additive is mainly used for reducing nitrogen and fixing sulfur, and the main reactant, the oxidant and the decomposition inhibitor are mutually matched to effectively reduce NO_xAnd SO₂And (5) discharging. Specifically, the main reactant is decomposed at high temperature, a porous structure is formed in the clean fuel, and the burnout rate is improved; the decomposition inhibitor is used for inhibiting the high-temperature decomposition of the sulfur fixation product and reducing coking; the oxidant decomposes and releases heat after being heated, which is beneficial to reducing the ignition point. O produced by decomposition₂The gas is favorable for ignition, the ignition time is shortened, and the smoke is reduced.

Preferably, the mass ratio of the main reactant to the oxidant to the decomposition inhibitor is (8-17): (2-4): for example, 1 may be 8:2:1, 9:2:1, 10:2:1, 11:2:1, 12:2:1, 13:2:1, 14:2:1, 15:2:1, 16:2:1, 17:2:1, 14:3:1 or 14:4:1, but is not limited to the recited values, and other values not recited in the above range of values are also applicable.

Preferably, the main reactant comprises any one or a combination of at least two of calcium propionate, calcium magnesium acetate, urea, cyanuric acid, calcium hydroxide, calcium carbonate, calcium oxide, strontium carbonate, ferric oxide or ferroferric oxide.

Preferably, the oxidant comprises any one or a combination of at least two of potassium permanganate, potassium chlorate or potassium ferrate.

Preferably, the decomposition inhibitor comprises any one of sodium chloride, potassium carbonate, sodium carbonate or a combination of at least two of them.

Preferably, the binder comprises any one or a combination of at least two of pregelatinized starch, clay, montmorillonite, attapulgite, bentonite, dextrin or hydroxymethyl cellulose.

In a preferred embodiment of the present invention, the particle size of the organic fuel is in the range of 5 to 400 mesh, and may be, for example, 5 mesh, 50 mesh, 100 mesh, 150 mesh, 200 mesh, 250 mesh, 300 mesh, 350 mesh or 400 mesh, but the organic fuel is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.

Preferably, the particle size of the composite additive is in the range of 35 to 3000 mesh, for example, 35 mesh, 100 mesh, 500 mesh, 1000 mesh, 1500 mesh, 2000 mesh, 2500 mesh or 3000 mesh, but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.

Preferably, the particle size of the binder is in the range of 100 to 400 mesh, for example, 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, 200 mesh, 220 mesh, 240 mesh, 260 mesh, 280 mesh, 300 mesh, 320 mesh, 340 mesh, 360 mesh, 380 mesh or 400 mesh, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

As a preferable technical scheme of the invention, the cross section of the composite clean fuel is circular.

Preferably, the diameter of the circular section of the composite clean fuel is 3-12 mm, such as 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.

Preferably, the length of the composite clean fuel is 5 to 100mm, for example, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm or 100mm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

Preferably, the composite clean fuel is spherical, cylindrical, ellipsoidal or capsule-shaped.

Preferably, the capsule shape comprises a cylinder and hemispheres positioned at two ends of the cylinder.

Preferably, the composite clean fuel is a thin sheet structure with a runway-shaped section, and the runway-shaped section is an outer contour formed by a rectangle and semi-circles positioned at the short sides of the rectangle.

Preferably, the sheet structure has a thickness of 3 to 12mm, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.

Preferably, the width of the sheet structure is 3 to 12mm, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.

Preferably, the length of the sheet structure is 5 to 100mm, for example, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm or 100mm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

In the invention, the composite clean fuel is a spherical, cylindrical, ellipsoidal or capsule-shaped solid structure, thereby being beneficial to improving the cold pressing strength, the falling strength, the crushing strength and the fuel fluidity, being convenient for long-distance transportation, being beneficial to avoiding the furnace material breaking caused by bridging in the storage bin and preventing the crushing by the feeding device. The molding process is simplified by utilizing the existing extrusion molding, roll forming and tabletting molding equipment, the shape is more regular, the demolding of a molding machine is facilitated, the equipment yield is improved, and the production cost is reduced.

In a second aspect, the invention provides a method for preparing the composite clean fuel as described in the first aspect, wherein the organic fuel, the composite additive and the binder are mixed in proportion to prepare raw material slurry, and the raw material slurry is formed and dried to obtain the composite clean fuel.

As a preferred technical scheme of the present invention, the preparation method specifically comprises the following steps:

weighing the organic dye, the composite additive and the binder in proportion, preferentially mixing the organic fuel and the composite additive, adding water and the binder in the mixing process, uniformly stirring to obtain raw material slurry, and forming and drying the raw material slurry to obtain the composite clean fuel.

Preferably, the forming process is carried out in a forming apparatus.

Preferably, the forming device comprises an extrusion device or a ring rolling device.

Preferably, the drying temperature is 200 to 300 ℃, for example, 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃ or 300 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.

Preferably, the drying time is 20-30 min, such as 20min, 21min, 22min, 23min, 24min, 25min, 26min, 27min, 28min, 29min or 30min, but is not limited to the recited values, and other values not recited in the range of the recited values are also applicable.

As a preferable technical scheme of the invention, the organic fuel comprises any one or a combination of at least two of bituminous coal, anthracite, semi-coke or biomass.

Preferably, the organic fuel comprises biomass and coal, and the coal comprises any one of bituminous coal, anthracite or semi-coke or a combination of at least two of the bituminous coal, the anthracite and the semi-coke.

Preferably, the organic fuel has a mass fraction of 50 to 90 wt%, for example 50 wt%, 52 wt%, 54 wt%, 56 wt%, 58 wt%, 60 wt%, 62 wt%, 64 wt%, 66 wt%, 68 wt%, 70 wt%, 72 wt%, 74 wt%, 76 wt%, 78 wt%, 80 wt%, 82 wt%, 84 wt%, 86 wt%, 88 wt% or 90 wt%, but is not limited to the recited values, and other non-recited values within the range are equally applicable.

Preferably, the particle size of the organic fuel is in the range of 5 to 400 mesh, for example, 5 mesh, 50 mesh, 100 mesh, 150 mesh, 200 mesh, 250 mesh, 300 mesh, 350 mesh or 400 mesh, but not limited to the listed values, and other values not listed in the range of values are also applicable.

Preferably, the complex additive comprises a main reactant, an oxidizing agent and a decomposition inhibitor.

Preferably, the mass ratio of the main reactant to the oxidant to the decomposition inhibitor is (8-17): (2-4): for example, 1 may be 8:2:1, 9:2:1, 10:2:1, 11:2:1, 12:2:1, 13:2:1, 14:2:1, 15:2:1, 16:2:1, 17:2:1, 14:3:1 or 14:4:1, but is not limited to the recited values, and other values not recited in the above range of values are also applicable.

Preferably, the main reactant comprises any one or a combination of at least two of calcium propionate, calcium magnesium acetate, urea, cyanuric acid, calcium hydroxide, calcium carbonate, calcium oxide, strontium carbonate, ferric oxide or ferroferric oxide.

Preferably, the oxidant comprises any one or a combination of at least two of potassium permanganate, potassium chlorate or potassium ferrate.

Preferably, the decomposition inhibitor comprises any one of sodium chloride, potassium carbonate, sodium carbonate or a combination of at least two of them.

Preferably, the mass fraction of the composite additive is 7 to 40 wt%, and for example, may be 7 wt%, 10 wt%, 12 wt%, 14 wt%, 16 wt%, 18 wt%, 20 wt%, 22 wt%, 24 wt%, 26 wt%, 28 wt%, 30 wt%, 32 wt%, 34 wt%, 36 wt%, 38 wt%, or 40 wt%, but is not limited to the recited values, and other unrecited values within the range of the recited values are also applicable.

Preferably, the particle size of the composite additive is in the range of 35 to 3000 mesh, for example, 35 mesh, 100 mesh, 500 mesh, 1000 mesh, 1500 mesh, 2000 mesh, 2500 mesh or 3000 mesh, but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.

Preferably, the binder comprises any one or a combination of at least two of pregelatinized starch, clay, montmorillonite, attapulgite, bentonite, dextrin or hydroxymethyl cellulose.

Preferably, the mass fraction of the binder is 3 to 10 wt%, and may be, for example, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, or 10 wt%, but is not limited to the recited values, and other values not recited within the range of the values are also applicable.

Preferably, the particle size of the binder is in the range of 100 to 400 mesh, for example, 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, 200 mesh, 220 mesh, 240 mesh, 260 mesh, 280 mesh, 300 mesh, 320 mesh, 340 mesh, 360 mesh, 380 mesh or 400 mesh, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

Preferably, 5 to 30ml of water is added to 100g of raw materials, wherein the raw materials refer to the organic fuel, the composite additive and the binder, and for example, 5ml of water, 6ml of water, 8ml of water, 10ml of water, 12ml of water, 14ml of water, 16ml of water, 18ml of water, 20ml of water, 22ml of water, 24ml of water, 26ml of water, 28ml of water or 30ml of water is added to 100g of raw materials, but the method is not limited to the recited values, and other values in the range of the recited values are also applicable.

In a third aspect, the present invention provides the use of a composite clean fuel as described in the first aspect for a domestic automated stove.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention uses bituminous coal, anthracite, semi-coke and biomass as main raw materials, has low cost and wide source, and can utilize powder solid waste resources generated in coal mines, biomass processing plants and the like, thereby reducing the raw material cost and the crushing cost of organic fuels. More preferably, the organic fuel is limited to contain biomass, and after the biomass is combined with coal, a reducibility red carbon layer is formed after the coal is volatilized and analyzed, so that NO generated by biomass combustion is facilitated_xReduction to N₂The biomass is beneficial to reducing the ignition point of coal and reducing the ignition time of fuel.

2. The composite additive is mainly used for reducing nitrogen and fixing sulfur, and the main reactant, the oxidant and the decomposition inhibitor are mutually matched to effectively reduce NO_xAnd SO₂And (5) discharging. Specifically, the main reactant is decomposed at high temperature, a porous structure is formed in the clean fuel, and the burnout rate is improved; decomposition inhibitorThe preparation is used for inhibiting the pyrolysis of sulfur fixation products and reducing coking; the oxidant decomposes and releases heat after being heated, which is beneficial to reducing the ignition point. O produced by decomposition₂The gas is favorable for ignition, the ignition time is shortened, and the smoke is reduced.

3. In the invention, the composite clean fuel is a spherical, cylindrical, ellipsoidal or capsule-shaped solid structure, thereby being beneficial to improving the cold pressing strength, the falling strength, the crushing strength and the fuel fluidity, being convenient for long-distance transportation, being beneficial to avoiding the furnace material breaking caused by bridging in the storage bin and preventing the crushing by the feeding device. The molding process is simplified by utilizing the existing extrusion molding, roll forming and tabletting molding equipment, the shape is more regular, the demolding of a molding machine is facilitated, the equipment yield is improved, and the production cost is reduced.

4. The composite clean fuel provided by the invention can be used as a special fuel for a civil automatic stove, and can solve the problems that the existing civil automatic stove has single fuel type and NO_xHigher and poor burnout. The preparation process of the composite clean fuel is simple, the high-temperature process is not involved, and the prepared composite clean fuel has the advantages of high finished product strength, good combustion effect, excellent environmental protection index, low economic cost and the like.

Drawings

FIG. 1 is a top view of a racetrack cross-section sheet structure provided in example 2 of the present invention;

FIG. 2 is a front view of a sheet structure of racetrack cross-section provided in example 2 of the present invention;

fig. 3 is a side view of a sheet structure of racetrack cross-section provided in example 2 of the present invention.

Detailed Description

It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.