High-calorific-value low-slagging biomass granular fuel and preparation method thereof

Abstract

The invention discloses a preparation method of a high-calorific-value low-slagging biomass granular fuel. The method comprises the following steps: mixing straw powder with a mixed suspension prepared from calcium carbonate and bacterial cellulose, performing drying, carrying out steam explosion treatment to obtain steam explosion modified straw powder, and uniformly mixing the steam explosion modified straw powder with n-octyl alcohol according to a certain ratio; carrying out high-temperature stirring reaction under a negative pressure condition to obtain a straw-based composite material; and finally, carrying out molding processing on the straw-based composite material to obtain the high-calorific-value low-slagging biomass granular fuel. The biomass granular fuel disclosed by the invention is high in heat value, low in slagging rate, good in forming effect, not easy to break and excellent in quality.

Description

technical field

[0001] The invention relates to the technical field of biomass fuels, in particular to a high calorific value and low slagging biomass particle fuel and a preparation method thereof. Background technique

[0002] With the increasing depletion of petrochemical resources and people's increasing emphasis on environmental protection issues, the demand for new clean energy has emerged as the times require. Biomass briquette fuel is a new type of briquette fuel made from agricultural and forestry waste, such as straw, sawdust, bagasse, rice bran, etc., through crushing, mixing, extrusion, drying and other processes. It is mainly divided into block and It is in granular form and has the advantages of direct combustion and convenient use. Since it does not contain sulfur and phosphorus, it does not produce sulfur dioxide and phosphorus pentoxide during combustion. It is a renewable and clean energy source. However, the raw materials of biomass briquettes, especially...

Examples

Embodiment 1

[0023] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0024] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 10:3:100;

[0025] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder evenly at a mass ratio of 1.5:10, and obtain modified straw powder with a water content of 8% after drying;

[0026] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment under the conditions of 110° C. and 1 MPa for 4 minutes, then washing and drying to obtain steam explosion modified straw powder;

[0027] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.03, and stir and react for 4 hours at a temperature of 120° C. and a vacuum of 0.001 MPa to obtain...

Embodiment 2

[0030] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0031] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 15:4.5:100;

[0032] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder evenly at a mass ratio of 1:10, and obtain modified straw powder with a water content of 12% after drying;

[0033] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment at 120° C. and 1.2 MPa for 5 minutes, then washing and drying to obtain steam explosion modified straw powder;

[0034] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.05, and stir and react for 3 hours at a temperature of 125° C. and a vacuum of 0.02 MPa to obtain a straw-based comp...

Embodiment 3

[0037] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0038] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 20:5:100;

[0039] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder at a mass ratio of 0.5:10, and dry to obtain modified straw powder with a water content of 15%;

[0040] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment under the conditions of 130° C. and 1.5 MPa for 8 minutes, and then washing and drying to obtain steam explosion modified straw powder;

[0041] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.06, and stir and react for 2 hours at a temperature of 130° C. and a vacuum of 0.05 MPa to obtain a stra...

technical field

[0001] The invention relates to the technical field of biomass fuels, in particular to a high calorific value and low slagging biomass particle fuel and a preparation method thereof. Background technique

[0002] With the increasing depletion of petrochemical resources and people's increasing emphasis on environmental protection issues, the demand for new clean energy has emerged as the times require. Biomass briquette fuel is a new type of briquette fuel made from agricultural and forestry waste, such as straw, sawdust, bagasse, rice bran, etc., through crushing, mixing, extrusion, drying and other processes. It is mainly divided into block and It is in granular form and has the advantages of direct combustion and convenient use. Since it does not contain sulfur and phosphorus, it does not produce sulfur dioxide and phosphorus pentoxide during combustion. It is a renewable and clean energy source. However, the raw materials of biomass briquettes, especially...

Examples

Embodiment 1

[0023] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0024] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 10:3:100;

[0025] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder evenly at a mass ratio of 1.5:10, and obtain modified straw powder with a water content of 8% after drying;

[0026] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment under the conditions of 110° C. and 1 MPa for 4 minutes, then washing and drying to obtain steam explosion modified straw powder;

[0027] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.03, and stir and react for 4 hours at a temperature of 120° C. and a vacuum of 0.001 MPa to obtain...

Embodiment 2

[0030] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0031] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 15:4.5:100;

[0032] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder evenly at a mass ratio of 1:10, and obtain modified straw powder with a water content of 12% after drying;

[0033] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment at 120° C. and 1.2 MPa for 5 minutes, then washing and drying to obtain steam explosion modified straw powder;

[0034] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.05, and stir and react for 3 hours at a temperature of 125° C. and a vacuum of 0.02 MPa to obtain a straw-based comp...

Embodiment 3

[0037] A method for preparing high calorific value and low slagging biomass pellet fuel, comprising the following steps:

[0038] S1. Add calcium carbonate and bacterial cellulose to water and disperse evenly to obtain a mixed suspension, wherein the mass ratio of calcium carbonate, bacterial cellulose and water is 20:5:100;

[0039] S2. Crush corn stalks to obtain straw powder, then mix the mixed suspension prepared in step S1 with the straw powder at a mass ratio of 0.5:10, and dry to obtain modified straw powder with a water content of 15%;

[0040] S3, subjecting the modified straw powder prepared in step S2 to steam explosion treatment under the conditions of 130° C. and 1.5 MPa for 8 minutes, and then washing and drying to obtain steam explosion modified straw powder;

[0041] S4. Mix the steam-exploded modified straw powder and n-octanol evenly at a mass ratio of 1:0.06, and stir and react for 2 hours at a temperature of 130° C. and a vacuum of 0.05 MPa to obtain a stra...