A multi-stage liquefaction process of coal and biomass

Abstract

The invention relates to the technical field of clean energy sources, and particularly provides a multi-stage liquefying technology of coal and biomass. The multi-stage liquefying technology comprisesthe following steps of firstly, compressing the coal and biomass raw materials, crushing, and crushing again; preparing into a slurry, so as to successfully obtain biomass water coal slurry which hashigh solid content and can be stably conveyed by a pump. The multi-stage liquefying technology of coal and biomass has the advantages that the coal and the biomass are hydrolyzed at high pressure andhigh temperature, and the hydrolyzed product is sequentially subject to primary cracking, hydrogenation reaction, deep cracking and hydrogenation reaction under the actions of critical hydrogen, a first catalyst and a second catalyst, so as to convert the coal and biomass into bio-oil and refine the bio-oil; the conversion rate of biomass and coal can reach 97 to 99%, the yield rate of bio-oil can reach 70 to 80%, and the amount of residues is lower than 3%.

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

[0081] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0082] (1) Take lignite, dry and dehydrate it, pulverize to a median particle size of 100 μm, and then send it to a briquetting machine for extrusion molding at a molding pressure of 15 MPa to obtain lignite compressed material. The compressed lignite material is sent to a hammer mill for pulverization to obtain a pulverized lignite material with a particle size of 100 μm. The above-mentioned pulverized lignite material and the amorphous ferric oxyhydroxide after sulfidation treatment in the reactor are added to the mixture of feces and water to form a biomass coal-water slurry, and hydrogen gas is passed into the biomass coal-water slurry to generate One-stage hydrogenation reaction to obtain one-stage hydrogenation product.

[0083] (2) Then add the amorphous alumina loaded with Mo oxide and Ni oxide sulfurized in the reactor to the primary hydrogenation product and feed hydroge...

Embodiment 2

[0085] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0086] Straw pretreatment:

[0087] Take wheat stalks and corn stalks, dry and dehydrate them, crush them to a median particle size of 100 μm, and then send them to a layering machine for extrusion molding at a molding pressure of 2 MPa to obtain compressed straw materials;

[0088] Send the straw compressed material into a hammer mill for crushing to obtain a straw crushed material with a median particle size of 50 μm, which is ready for use.

[0089] Pretreatment of coal raw materials:

[0090] Take lignite, dry and dehydrate it, pulverize until the median particle size is 50 μm, and then send it into a briquetting machine for extrusion molding, and the molding pressure is 5MPa to obtain lignite compressed material;

[0091] Send the brown coal compressed material into a ball mill for crushing to obtain the brown coal crushed material with a median particle size of 30 μm, wh...

Embodiment 3

[0105] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0106] Pretreatment of biomass raw materials:

[0107] (1) Get the reed, dry and dehydrate it, and then send it to the jet mill for crushing to obtain the primary crushed material of the reed, with a particle size of D 50 is 200 μm.

[0108] (2) Send the reed primary pulverized material into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain a reed compressed material.

[0109] (3) The reed compressed material is sent into the jet mill, and secondary pulverization is carried out to obtain the reed secondary pulverization material, particle size D 50 40 μm, set aside.

[0110] Pretreatment of coal raw materials:

[0111] (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 100 μm.

[0112] (2...

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

[0081] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0082] (1) Take lignite, dry and dehydrate it, pulverize to a median particle size of 100 μm, and then send it to a briquetting machine for extrusion molding at a molding pressure of 15 MPa to obtain lignite compressed material. The compressed lignite material is sent to a hammer mill for pulverization to obtain a pulverized lignite material with a particle size of 100 μm. The above-mentioned pulverized lignite material and the amorphous ferric oxyhydroxide after sulfidation treatment in the reactor are added to the mixture of feces and water to form a biomass coal-water slurry, and hydrogen gas is passed into the biomass coal-water slurry to generate One-stage hydrogenation reaction to obtain one-stage hydrogenation product.

[0083] (2) Then add the amorphous alumina loaded with Mo oxide and Ni oxide sulfurized in the reactor to the primary hydrogenation product and feed hydroge...

Embodiment 2

[0085] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0086] Straw pretreatment:

[0087] Take wheat stalks and corn stalks, dry and dehydrate them, crush them to a median particle size of 100 μm, and then send them to a layering machine for extrusion molding at a molding pressure of 2 MPa to obtain compressed straw materials;

[0088] Send the straw compressed material into a hammer mill for crushing to obtain a straw crushed material with a median particle size of 50 μm, which is ready for use.

[0089] Pretreatment of coal raw materials:

[0090] Take lignite, dry and dehydrate it, pulverize until the median particle size is 50 μm, and then send it into a briquetting machine for extrusion molding, and the molding pressure is 5MPa to obtain lignite compressed material;

[0091] Send the brown coal compressed material into a ball mill for crushing to obtain the brown coal crushed material with a median particle size of 30 μm, wh...

Embodiment 3

[0105] A multi-stage liquefaction process of coal and biomass, comprising the following steps:

[0106] Pretreatment of biomass raw materials:

[0107] (1) Get the reed, dry and dehydrate it, and then send it to the jet mill for crushing to obtain the primary crushed material of the reed, with a particle size of D 50 is 200 μm.

[0108] (2) Send the reed primary pulverized material into a briquetting machine or a plodder for extrusion molding with a molding pressure of 3 MPa to obtain a reed compressed material.

[0109] (3) The reed compressed material is sent into the jet mill, and secondary pulverization is carried out to obtain the reed secondary pulverization material, particle size D 50 40 μm, set aside.

[0110] Pretreatment of coal raw materials:

[0111] (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 100 μm.

[0112] (2...

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