A method for direct liquefaction of coal and biomass

Abstract

The invention relates to the technical field of clean energy, in particular to a process for smelting coal and biomass. The coal and biomass materials are subjected to 'crushing, compression and crushing again' treatment, and biomass coal oil slurry with high solid content and capable of being conveying stably by a pump is successfully obtained. The biomass coal oil slurry is subjected to first liquefaction reaction and second liquefaction reaction sequentially, so that the fact that the biomass is completely liquefied into liquid phase and the yield of the liquid is increased; through twice gas and liquid separation, oil products are enriched and the residues in the oil products are enriched and caked; and through first distillation and second distillation, the yield of the liquid oil isfurther increased, the residues in the liquid oil is further enriched and caked and is discharged to the outside through the bottom of a distillation device, the residues are prevented from entering the subsequent process and the residue solid content of the liquid oil is reduced; and through test, the yield of the liquid oil is above 98 percent by weight and the residue solid content of the liquid oil is less than 0.5 percent by weight.

Description

technical field

[0001] The invention relates to the technical field of clean energy, in particular to a co-smelting process of coal and biomass. Background technique

[0002] At present, my country uses coal as the main energy source, and the traditional coal utilization method is combustion, but the problem of air pollution caused by coal combustion has become increasingly serious; moreover, the quality of coal in my country has declined year by year, which has increased the proportion of raw coal washed year after year, and coal washing wastewater has brought severe water pollution. Severe environmental problems have made the adjustment of energy structure one of the important tasks of my country's energy development. However, my country's own energy resource storage is poor in oil and rich in coal, and it already needs to rely on a large amount of oil imports every year to meet the needs of production and development. If the country's energy structure is adjusted by reduc...

Examples

Embodiment 1

[0087] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0088] Pretreatment of biomass raw materials:

[0089] (1) Take wheat stalks, dry and dehydrate them, and then send them to a jet mill for crushing to obtain primary crushed wheat stalks with a particle size of D 50 is 200 μm.

[0090] (2) Sending the primary crushed material of wheat straw into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain a compressed material of wheat straw.

[0091] (3) Send the wheat straw compressed material into the jet mill for secondary crushing to obtain the secondary crushed material of wheat straw, particle size D 50 40 μm, set aside.

[0092] Pretreatment of coal raw materials:

[0093] (1) Take Shendong long-flame coal, dry and dehydrate it, and then send it to a ball mill for crushing to obtain primary crushed material of Shendong long-flame coal, particle size D ...

Embodiment 2

[0108] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0109] Pretreatment of reeds:

[0110] (1) Take the reed, dry and dehydrate it, crush it to a median particle size of 300 μm, and then send it to a briquetting machine or a plodder for extrusion molding at a molding pressure of 0.5 MPa to obtain a compressed reed material.

[0111] (2) Send the compressed reed material into a hammer mill for crushing to obtain crushed reed material for use.

[0112] Pretreatment of coal raw materials:

[0113] (1) Get lignite, dry it and dehydrate it, then send it into a briquetting machine for extrusion molding, and the molding pressure is 5MPa to obtain lignite compressed material.

[0114] (2) Send the lignite compressed material into a ball mill for pulverization to obtain the lignite pulverized material for use.

[0115] Preparation of hydrogenation catalyst:

[0116] The hydrogenation catalyst raw material ...

Embodiment 3

[0128] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0129] Pretreatment of biomass raw materials:

[0130] (1) Get the leaves, dry and dehydrate them, and then send them to the jet mill for crushing to obtain primary crushed leaves with a particle size of D 50 is 200 μm.

[0131] (2) Send the primary pulverized material of the leaves into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain compressed leaves.

[0132] (3) The leaf compressed material is sent into the jet mill, and secondary pulverization is carried out to obtain the secondary pulverized material of the leaf, particle diameter D 50 40 μm, set aside.

[0133] Pretreatment of coal raw materials:

[0134] (1) Take Shendong long-flame coal, dry and dehydrate it, and then send it to a ball mill for crushing to obtain primary crushed material of Shendong long-flame coal, particle size D 50 is...

technical field

[0001] The invention relates to the technical field of clean energy, in particular to a co-smelting process of coal and biomass. Background technique

[0002] At present, my country uses coal as the main energy source, and the traditional coal utilization method is combustion, but the problem of air pollution caused by coal combustion has become increasingly serious; moreover, the quality of coal in my country has declined year by year, which has increased the proportion of raw coal washed year after year, and coal washing wastewater has brought severe water pollution. Severe environmental problems have made the adjustment of energy structure one of the important tasks of my country's energy development. However, my country's own energy resource storage is poor in oil and rich in coal, and it already needs to rely on a large amount of oil imports every year to meet the needs of production and development. If the country's energy structure is adjusted by reduc...

Examples

Embodiment 1

[0087] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0088] Pretreatment of biomass raw materials:

[0089] (1) Take wheat stalks, dry and dehydrate them, and then send them to a jet mill for crushing to obtain primary crushed wheat stalks with a particle size of D 50 is 200 μm.

[0090] (2) Sending the primary crushed material of wheat straw into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain a compressed material of wheat straw.

[0091] (3) Send the wheat straw compressed material into the jet mill for secondary crushing to obtain the secondary crushed material of wheat straw, particle size D 50 40 μm, set aside.

[0092] Pretreatment of coal raw materials:

[0093] (1) Take Shendong long-flame coal, dry and dehydrate it, and then send it to a ball mill for crushing to obtain primary crushed material of Shendong long-flame coal, particle size D ...

Embodiment 2

[0108] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0109] Pretreatment of reeds:

[0110] (1) Take the reed, dry and dehydrate it, crush it to a median particle size of 300 μm, and then send it to a briquetting machine or a plodder for extrusion molding at a molding pressure of 0.5 MPa to obtain a compressed reed material.

[0111] (2) Send the compressed reed material into a hammer mill for crushing to obtain crushed reed material for use.

[0112] Pretreatment of coal raw materials:

[0113] (1) Get lignite, dry it and dehydrate it, then send it into a briquetting machine for extrusion molding, and the molding pressure is 5MPa to obtain lignite compressed material.

[0114] (2) Send the lignite compressed material into a ball mill for pulverization to obtain the lignite pulverized material for use.

[0115] Preparation of hydrogenation catalyst:

[0116] The hydrogenation catalyst raw material ...

Embodiment 3

[0128] The method for direct liquefaction of coal and biomass provided in this embodiment comprises the following steps:

[0129] Pretreatment of biomass raw materials:

[0130] (1) Get the leaves, dry and dehydrate them, and then send them to the jet mill for crushing to obtain primary crushed leaves with a particle size of D 50 is 200 μm.

[0131] (2) Send the primary pulverized material of the leaves into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain compressed leaves.

[0132] (3) The leaf compressed material is sent into the jet mill, and secondary pulverization is carried out to obtain the secondary pulverized material of the leaf, particle diameter D 50 40 μm, set aside.

[0133] Pretreatment of coal raw materials:

[0134] (1) Take Shendong long-flame coal, dry and dehydrate it, and then send it to a ball mill for crushing to obtain primary crushed material of Shendong long-flame coal, particle size D 50 is...

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