Method for preparing gas by using biomass and coal

A biomass and gas technology, applied in the manufacture of combustible gas, granular/powdered fuel gasification, petroleum industry, etc., can solve the problem of limited tar treatment, reduce energy consumption, reduce emissions, reduce emissions and energy consumption Effect

Inactive Publication Date: 2014-05-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the gas production process of these methods, either an external system is required to provide water vapor, or a catalyst is required, or the treatment of the tar produced in the cracking process is limited.

Method used

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  • Method for preparing gas by using biomass and coal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the method for co-production of gas by biomass and coal, the specific operations are as follows:

[0030] (1) Using straw and cow dung as the main biomass raw materials, crush the straw so that the particle size is less than 2 cm, preheat and dry to a moisture content of 3%, and the mass ratio of straw and cow dung is 1:1. The waste heat obtained in the process preheats and dries the straw and cow dung (this step requires heat from an external source when starting up for the first time), and the water vapor generated during the drying process is transported to a medium-temperature gasification device;

[0031] (2) Send the dried material in step (1) into a grinding equipment, and the particle size of the material after grinding is less than 1mm to obtain powdery biomass;

[0032] (3) The powdery biomass and pulverized coal obtained in step (2) are sent to a medium-temperature gasification device, and the water vapor generated in step (1) is gasified in a m...

Embodiment 2

[0038] Embodiment 2: the method for co-production of gas by biomass and coal, the specific operations are as follows:

[0039] (1) Using straw and bean dregs as the main biomass raw materials, crush the straw so that the particle size is less than 2 cm, preheat and dry to a moisture content of 2%, and the mass ratio of straw to cow dung is 2:1. The obtained waste heat preheats and dries the straw and bean dregs (this step requires heat from an external source when starting up for the first time), and the water vapor generated during the drying process is sent to a medium-temperature gasification device;

[0040] (2) Sending the dried material in step (1) into a grinding equipment, and the particle size of the material after grinding is less than 1 mm to obtain powdery biomass.

[0041] (3) The powdered biomass and coal powder obtained in step (2) are sent to a medium-temperature gasification device, and the water vapor generated in step (1) is gasified in a medium-temperature...

Embodiment 3

[0047] Embodiment 3: the method for the co-production of gas by biomass and coal, the specific operations are as follows:

[0048] (1) Using sawdust and branches and leaves as the main biomass raw materials, the wood chips and branches and leaves are crushed to make the particle size less than 2 cm, preheated and dried to a moisture content of 3%, and the mass ratio of wood chips and branches and leaves is 1:2. The waste heat obtained in the subsequent process preheats and dries the wood chips and branches and leaves (this step requires heat from an external source when starting up for the first time), and the water vapor generated during the drying process is transported to the primary medium-temperature gasification device;

[0049] (2) Sending the dried material in step (1) into a grinding equipment, the particle size of the material after grinding is less than 1 mm, and powdery biomass is obtained;

[0050] (3) The powdery biomass and pulverized coal obtained in step (2) ...

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Abstract

The invention discloses a method for preparing gas by using biomass and coal. By using the biomass as main raw materials, a certain amount of coal is added to prepare biomass gas. The method comprises the processes of preheating drying, primary medium-temperature gasification, secondary high-temperature gasification, gas purification and the like. The gas prepared by using the method is high in heat value and can be in accordance with a gas using standard. By the adoption of the method, new energy is obtained; wastes are recycled; intermediate products and waste heat are fully and reasonably utilized technologically; pollutant emission and energy consumption are reduced; and the method is in accordance with an idea of cleaner production.

Description

technical field [0001] The invention relates to a method for jointly preparing gas by utilizing biomass waste produced in agriculture and coal, which fully utilizes biomass to produce gas under the synergistic effect of coal, and belongs to the fields of waste resource utilization and new energy. Background technique [0002] The net increase in biomass production on the earth is huge, equivalent to 10 times the total energy consumption in the world at present, and has great potential for development and utilization. [0003] my country's agricultural and forestry production occupies an important position. A large amount of biomass waste is produced in the process of agricultural and forestry production and agricultural by-product processing, including various straws, rice husks, livestock manure, bean dregs, wood chips, etc. Improper disposal of biomass waste often causes Environmental pollution, including air, water, soil, etc. The annual output of rice husk in my country ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/84C10J3/72C10J3/60C10J3/66
CPCY02P20/129
Inventor 宁平马懿星瞿广飞曾金花林奕璐
Owner KUNMING UNIV OF SCI & TECH
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