A co-liquefaction process of coal and biomass

Abstract

The invention relates to the technical field of clean energy, in particular to a coal and biomass co-liquefaction technology. According to the coal and biomass co-liquefaction technology, coal and biomass materials are subjected to crushing, compression and re-crushing treatment, and then slurry is prepared, so that biomass coal oil slurry, with high solid content, capable of being stably conveyedthrough a pump, is obtained, and high-viscosity waste oil which can not serve as a coal and biomass liquefaction solvent in the prior art can be utilized. By leading hydrogen into the biomass coal oil slurry and controlling the reaction pressure to be 15 to 25MPa and the reaction temperature to be 380 to 480 DEG C, biomass oil is formed finally. The technology ensures that coal and biomass are liquefied in high pressure and high temperature environment, and cracking and hydrogenation reaction are further produced, so that the conversion of coal and biomass to biomass oil is realized. In the technology, the conversion ratio of coal and biomass can reach 90 to 95 percent, the yield of biomass oil can reach 40 to 75 percent, and the amount of residue is not greater than 3 percent.

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

[0074] A co-liquefaction process of coal and biomass, comprising the steps of:

[0075] Lignite was taken, dried and dehydrated, crushed to a median particle size of 50 μm, and then extruded at 30° C. with a molding pressure of 15 MPa to obtain lignite compressed material. The compressed lignite material is pulverized to obtain a pulverized lignite material with a particle size of 30 μm. The above-mentioned pulverized lignite material and the amorphous ferric oxyhydroxide after sulfidation treatment in the reactor are added to the mixture of liquid feces and waste engine oil to form a biomass kerosene slurry, and hydrogen gas is passed into the biomass kerosene slurry to generate reaction, and control the reaction pressure to 16MPa and the reaction temperature to 480°C to finally obtain bio-oil.

Embodiment 2

[0077] A co-liquefaction process of coal and biomass, comprising the steps of:

[0078] Straw pretreatment:

[0079] (1) Take the straw, dry it for dehydration, crush it to a median particle size of 300 μm, and then send it to a briquetting machine or plodder for extrusion molding at 60° C. with a molding pressure of 2 MPa to obtain a compressed straw material.

[0080] (2) Send the straw compressed material into a hammer mill for crushing to obtain straw crushed material for use.

[0081] Pretreatment of coal raw materials:

[0082] (1) Take lignite, dry it for dehydration, crush it to a median particle size of 100 μm, and then send it to a briquetting machine for extrusion molding at 30° C. at a molding pressure of 5 MPa to obtain lignite compressed material.

[0083] (2) Send the compressed lignite material into a ball mill for pulverization to obtain a pulverized lignite material with a median particle size of 50 μm for use.

[0084] Preparation and liquefaction of...

Embodiment 3

[0093] A co-liquefaction process of coal and biomass, comprising the steps of:

[0094] Pretreatment of biomass raw materials:

[0095] (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.

[0096] (2) Send the reed primary pulverized material into a briquetting machine or a plodder for extrusion molding at 50° C. with a molding pressure of 3 MPa to obtain a reed compressed material.

[0097] (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.

[0098] Pretreatment of coal raw materials:

[0099] (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 80 μm.

[0100] (2) Send th...

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

[0074] A co-liquefaction process of coal and biomass, comprising the steps of:

[0075] Lignite was taken, dried and dehydrated, crushed to a median particle size of 50 μm, and then extruded at 30° C. with a molding pressure of 15 MPa to obtain lignite compressed material. The compressed lignite material is pulverized to obtain a pulverized lignite material with a particle size of 30 μm. The above-mentioned pulverized lignite material and the amorphous ferric oxyhydroxide after sulfidation treatment in the reactor are added to the mixture of liquid feces and waste engine oil to form a biomass kerosene slurry, and hydrogen gas is passed into the biomass kerosene slurry to generate reaction, and control the reaction pressure to 16MPa and the reaction temperature to 480°C to finally obtain bio-oil.

Embodiment 2

[0077] A co-liquefaction process of coal and biomass, comprising the steps of:

[0078] Straw pretreatment:

[0079] (1) Take the straw, dry it for dehydration, crush it to a median particle size of 300 μm, and then send it to a briquetting machine or plodder for extrusion molding at 60° C. with a molding pressure of 2 MPa to obtain a compressed straw material.

[0080] (2) Send the straw compressed material into a hammer mill for crushing to obtain straw crushed material for use.

[0081] Pretreatment of coal raw materials:

[0082] (1) Take lignite, dry it for dehydration, crush it to a median particle size of 100 μm, and then send it to a briquetting machine for extrusion molding at 30° C. at a molding pressure of 5 MPa to obtain lignite compressed material.

[0083] (2) Send the compressed lignite material into a ball mill for pulverization to obtain a pulverized lignite material with a median particle size of 50 μm for use.

[0084] Preparation and liquefaction of...

Embodiment 3

[0093] A co-liquefaction process of coal and biomass, comprising the steps of:

[0094] Pretreatment of biomass raw materials:

[0095] (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.

[0096] (2) Send the reed primary pulverized material into a briquetting machine or a plodder for extrusion molding at 50° C. with a molding pressure of 3 MPa to obtain a reed compressed material.

[0097] (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.

[0098] Pretreatment of coal raw materials:

[0099] (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 80 μm.

[0100] (2) Send th...

Images