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Method for applying biomass briquettes to coal blending for coking

A technology for forming fuel, coal blending and coking, which is applied to biofuels, waste fuels, coke ovens, etc., can solve the problems of increasing the content of inert components in coking coal, destroying the balance between active components and inert components in coking coal, and reducing the quality of coke, etc. Achieve the effect of saving high-quality coal resources, low raw material prices, and reducing coking costs

Inactive Publication Date: 2017-03-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theory of coal blending and coking reveals that the balance of active and inert components in coking coal is a necessary condition for obtaining high-quality coke. The addition of biomass will increase the content of inert components in coking coal and destroy the balance of active and inert components in coking coal, which will lead Decreased coke quality

Method used

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  • Method for applying biomass briquettes to coal blending for coking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]Example 1. Taking pine sawdust as an example, the test baked pine sawdust with a particle size of 1-3 mm in a constant temperature oven at 180-200 °C for 20 minutes and then cooled it to below 60 °C in air to prepare biochar; Mix uniformly at a ratio of 10:1 to prepare a mixture of biochar and coal tar pitch, and use a connecting and unloading molding machine under a pressure of 15MPa to prepare biomass molding raw materials; Mix evenly, the proportion of mixed coal with a particle size of less than 3mm is 85%, and the mass percentage of each coal in the mixed coal is 25% fat coal, 30% coking coal, 5% lean coal, 20% 1 / 3 coking coal, 20% gas coal; then, coke the mixture of biomass briquette fuel and blended coal in a 40kg experimental coke oven, and extinguish the coke with an appropriate amount of water after the coke is mature; The quality indicators of coke (mechanical strength and thermal properties of coke) were determined and compared with those of coke refined wit...

Embodiment 2

[0027] Example 2. Taking pine sawdust as an example, the test baked pine sawdust with a particle size of 1-3 mm in a constant temperature oven at 180-200 °C for 30 minutes, then air-cooled to below 60 °C to prepare biochar; The ratio of 8:1 is mixed evenly to prepare a mixture of biochar and coal tar pitch, and the biomass molding raw material is prepared by using a connecting and unloading molding machine under a pressure of 15MPa; Mix evenly, the proportion of mixed coal with a particle size of less than 3mm is 85%, and the mass percentage of each coal in the mixed coal is 25% fat coal, 30% coking coal, 5% lean coal, 20% 1 / 3 coking coal, 20% gas coal; then, coke the mixture of biomass briquette fuel and blended coal in a 40kg experimental coke oven, and extinguish the coke with an appropriate amount of water after the coke is mature; The quality indicators of coke (mechanical strength and thermal properties of coke) were determined and compared with those of coke refined wi...

Embodiment 3

[0028] Example 3. Taking pine sawdust as an example, the test baked pine sawdust with a particle size of 1-3 mm in a constant temperature oven at 180-200 °C for 20 minutes and then cooled it to below 60 °C in air to prepare biochar; Mix uniformly at a ratio of 10:1 to prepare a mixture of biochar and coal tar pitch, and use a connecting and unloading molding machine under a pressure of 15MPa to prepare biomass molding raw materials; Mix evenly, the proportion of mixed coal with a particle size of less than 3mm is 85%, and the mass percentage of each coal in the mixed coal is 20% fat coal, 30% coking coal, 10% lean coal, 20% 1 / 3 coking coal, 20% gas coal; then, coke the mixture of biomass briquette fuel and blended coal in a 40kg experimental coke oven, and extinguish the coke with an appropriate amount of water after the coke is mature; The quality indicators of coke (mechanical strength and thermal properties of coke) were determined and compared with those of coke refined w...

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Abstract

The invention discloses a method for applying biomass briquettes to coal blending for coking. The method comprises the following steps: S01, baking biomass raw materials at a low temperature to prepare biochar, including baking the biomass raw materials in particle sizes of 1-3 mm at 180-200 DEG C for 20-30 min and then quickly cooling the baked biomass raw materials to prepare the biochar; S02, preparing the biomass briquettes, including uniformly mixing the biochar prepared in Step S01 with coal pitch at the ratio of (2:1)-(10:1) and then performing compression molding at 10-20 MPa to prepare the biomass briquettes; and S03, applying the biomass briquettes to coal blending for coking, including adding 7%-15% by weight of biomass briquettes into coal blend raw materials and mixing the biomass briquettes with the coal blend raw materials for coking in a coke oven. When applied to coal blending for coking, the biomass briquettes prepared according to the method can reduce the coking cost greatly, save a great quantity of high-quality coal resources and reduce the emission of CO2 and pollutants on the premise of ensuring that the mechanical strength and reactivity of produced coke meet blast-furnace ironmaking requirements.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of renewable energy (biomass) utilization and coal chemical technology, and more specifically relates to a method for preparing biomass briquette fuel by mixing biomass and coal tar pitch for coal blending and coking. Background technique [0002] Coke acts as a reducing agent, heat source, carbon supply agent and loose skeleton in the blast furnace ironmaking process, and is an indispensable raw material in the blast furnace ironmaking process. During the "Twelfth Five-Year Plan" period, the average annual coke consumption of my country's blast furnace ironmaking process reached 454 million tons, which was converted into a coking raw coal consumption of about 1.025 billion tons, and the average annual emission of CO 2 About 1 billion tons. Facing the increasing scarcity of coking coal resources and global warming, the task of energy conservation and emission reduction in the blast furnace...

Claims

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Application Information

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IPC IPC(8): C10L5/44C10L5/48C10B53/04
CPCY02E50/10Y02E50/30C10L5/44C10B53/04C10L5/48
Inventor 秦林波韩军吴高明
Owner WUHAN UNIV OF SCI & TECH
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