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Method for preparing cement kiln fuel from lignite and biomass co-pyrolysis product

A technology for pyrolysis products and biomass, which can be applied to biofuels, waste fuels, fuels, etc., can solve the problems of low calorific value of lignite, and the difficulty of lignite calorific value to meet the combustion temperature, so as to improve energy utilization, low cost and reduce cost Effect

Inactive Publication Date: 2019-10-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the calorific value of lignite is low, and the combustion temperature of cement kiln is above 1350 ° C. It is difficult to meet the calorific value of lignite.

Method used

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  • Method for preparing cement kiln fuel from lignite and biomass co-pyrolysis product

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The dried pine sawdust and lignite were pulverized and sieved respectively to obtain a 50-200 mesh sample, and the pine sawdust sample and the lignite sample were mixed uniformly at a mass ratio of 3:7 to obtain a mixed sample with a total mass of 10 g. Then put the mixed sample in a pyrolysis furnace for airtight anaerobic pyrolysis. The heating rate of the pyrolysis process is 10°C / min, the constant temperature of pyrolysis is 400°C, and the pyrolysis time at constant temperature is 30min. After pyrolysis, the pyrolysis gas is condensed by a circulating condensing device, and the hydrous pyrolysis tar is separated. The hydrolysis pyrolysis tar is dehydrated to obtain pyrolysis tar. The condensed pyrolysis gas is collected and sealed with a gas collection bag. The pyrolysis furnace The remaining solid product is pyrolysis semi-coke, and finally the pyrolysis semi-coke and lignite are mechanically mixed at a mass ratio of 1:4, 1:1, and 4:1 respectively to obtain fuel.

Embodiment 2

[0026] The dried pine sawdust and lignite were pulverized and sieved respectively to obtain a 50-200 mesh sample, and the pine sawdust sample and the lignite sample were mixed uniformly at a mass ratio of 4:6 to obtain a mixed sample with a total mass of 10 g. Then put the mixed sample in a pyrolysis furnace for airtight anaerobic pyrolysis. The heating rate of the pyrolysis process is 20°C / min, the constant temperature of pyrolysis is 450°C, and the pyrolysis time at constant temperature is 30min. After pyrolysis, the pyrolysis gas is condensed by a circulating condensing device, and the hydrous pyrolysis tar is separated. The hydrolysis pyrolysis tar is dehydrated to obtain pyrolysis tar. The condensed pyrolysis gas is collected and sealed with a gas collection bag. The pyrolysis furnace The remaining solid product is pyrolysis semi-coke, and finally the pyrolysis semi-coke and lignite are mechanically mixed at a mass ratio of 1:4, 1:1, and 4:1 respectively to obtain fuel.

Embodiment 3

[0028] The dried pine sawdust and lignite were pulverized and sieved respectively to obtain a 50-200 mesh sample, and the pine sawdust sample and the lignite sample were mixed uniformly at a mass ratio of 3:7 to obtain a mixed sample with a total mass of 10 g. Then put the mixed sample in a pyrolysis furnace for airtight anaerobic pyrolysis. The heating rate of the pyrolysis process is 10°C / min, the constant temperature of pyrolysis is 450°C, and the pyrolysis time at constant temperature is 30min. After pyrolysis, the pyrolysis gas is condensed by a circulating condensing device, and the hydrous pyrolysis tar is separated. The hydrolysis pyrolysis tar is dehydrated to obtain pyrolysis tar. The condensed pyrolysis gas is collected and sealed with a gas collection bag. The pyrolysis furnace The remaining solid product is pyrolysis semi-coke, and finally the pyrolysis semi-coke and lignite are mechanically mixed at a mass ratio of 1:4, 1:1, and 4:1 respectively to obtain fuel.

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Abstract

The invention relates to a method for preparing a cement kiln fuel by using a lignite and biomass co-pyrolysis product, and the method comprises the following steps: 1) respectively drying lignite andbiomass and respectively crushing the lignite and the biomass to obtain a lignite sample and a biomass sample; 2) mixing the biomass sample and the lignite sample evenly according to the mass ratio of 3: 7 to 4: 6, and performing oxygen-free pyrolysis on the mixed sample; 3) obtaining pyrolysis products after pyrolysis, wherein the pyrolysis products comprise a pyrolysis gas, pyrolysis tar and pyrolysis semi-coke; and 4) mixing the pyrolysis semi-coke with the lignite to obtain the cement kiln combustion fuel. The method has the advantages of simple operation and low cost, uses low-grade coalas a raw material to prepare the excellent cement kiln substitute fuel, and opens a new energy supply idea for the cement industry; at the same time, the utilization efficiency of biomass resources and lignite resources is improved, and the comprehensive and clean utilization of all solid, liquid and gas resources of the products is realized.

Description

technical field [0001] The invention relates to the technical field of preparation for resource utilization, in particular to a method for preparing cement kiln fuel by co-pyrolysis products of lignite and biomass. Background technique [0002] my country is a big consumer of oil and gas resources with scarce oil and gas resources and the main source of oil and gas depends on imports. In recent years, my country's dependence on foreign oil and gas has repeatedly hit new highs. In 2017, oil consumption reached 590 million tons, the highest growth rate since 2011; however, domestic production fell to 192 million tons, below 200 million tons for the second consecutive year. However, my country is rich in coal resources, and its coal storage ranks third in the world. Therefore, the research and development of efficient and clean coal resources and other renewable resources has become an important way to ensure my country's sustainable development. [0003] With the urbanization...

Claims

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Application Information

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IPC IPC(8): C10L5/04C10L5/40C10B53/00C10B53/02
CPCC10B53/00C10B53/02C10L5/04C10L5/40Y02E50/10Y02E50/30
Inventor 赵璐涵何选明李昊范贵平
Owner WUHAN UNIV OF SCI & TECH
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