Method for preparing synthesis gas by co-gasifying livestock and poultry waste hydrothermal carbon and pulverized coal

A technology of livestock and poultry waste and hydrothermal carbon, which is applied in the field of resource utilization and livestock and poultry waste cleaning, can solve the problems of high moisture content of livestock and poultry waste, poor environmental and economic benefits, and low energy density, and achieve saving Coal resources, large scale of raw material processing, and high reaction conversion rate

Inactive Publication Date: 2020-09-29
NINGXIA UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] At present, livestock and poultry waste is mainly processed through composting, but composting technology is greatly affected by land, climate, and timeliness of crop production, and there are also corresponding process wastewater treatment problems, and the environmental and economic benefits are relatively poor.
[0005] Livestock and poultry waste has high moisture content, low carbon content, low energy density, and irregular shape, which limit its direct industrial application as a gasification raw material.

Method used

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  • Method for preparing synthesis gas by co-gasifying livestock and poultry waste hydrothermal carbon and pulverized coal
  • Method for preparing synthesis gas by co-gasifying livestock and poultry waste hydrothermal carbon and pulverized coal
  • Method for preparing synthesis gas by co-gasifying livestock and poultry waste hydrothermal carbon and pulverized coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] use figure 1 The entrained bed gasifier device and figure 2 The multi-channel nozzle is used to prepare synthetic gas from livestock and poultry waste and coal water slurry.

[0038] (1) Collect fresh livestock and poultry waste, and dry them naturally until the moisture content is 16%;

[0039] (2) The product of step (1) was hydrothermally carbonized at 200°C and 2MPa for 2.5 hours to obtain hydrothermal carbon with a particle size of 60 microns, a water content of 8% (weight), and a calorific value of about 20MJ / kg;

[0040] (3) adding water to the hydrothermal carbon obtained in step (2) and beating to obtain a hydrothermal carbon slurry with a carbon matrix weight concentration of 60%;

[0041] (4) the hydrothermal carbon slurry of step (3), the carbon matrix weight concentration being 60% coal water slurry, hydrothermal carbon slurry oxidant and coal water slurry oxidant, are sent into by the respective runners of the multi-channel nozzle respectively Gasifica...

Embodiment 2

[0058] use figure 1 The entrained bed gasifier device and figure 2The multi-channel nozzle is used to prepare synthetic gas from livestock and poultry waste and coal water slurry.

[0059] (1) Collect fresh livestock and poultry waste, and dry them naturally until the moisture content is 12%;

[0060] (2) The product of step (1) was hydrothermally carbonized for 2 hours at 250° C. and 2.5 MPa anaerobic conditions to obtain a particle size of 50 microns, a moisture content of 5% (weight), and a low calorific value of about 25 MJ / kg. hydrothermal carbon;

[0061] (3) adding water to the hydrothermal carbon obtained in step (2) and beating to obtain a hydrothermal carbon slurry with a carbon substrate weight concentration of 65%;

[0062] (4) the hydrothermal carbon slurry of step (3), the carbon matrix weight concentration being 65% coal water slurry, hydrothermal carbon slurry oxidant and coal water slurry oxidant, are sent into by the respective runners of the multi-channe...

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Abstract

The invention discloses a method for preparing synthesis gas by co-gasifying livestock and poultry waste hydrothermal carbon and pulverized coal. The method comprises the following steps: (1) airing livestock and poultry waste; (2) performing hydrothermal carbonization to obtain hydrothermal carbon; (3) adding water into the hydrothermal carbon, and pulping to obtain hydrothermal carbon slurry; and (4) respectively feeding the hydrothermal carbon slurry, the coal water slurry, the hydrothermal carbon slurry oxidant and the coal water slurry oxidant in the step (3) into a gasification furnace through respective runners of a multi-channel nozzle to obtain the synthesis gas. According to the method, pathogenic bacteria can be killed, organic matter in the waste is subjected to energy recoveryand cyclic utilization, the raw material treatment scale is large, the reaction conversion rate is high, environmental friendliness is achieved, and the technical possibility is provided for large-scale livestock and poultry waste treatment. According to the method, the poultry waste is subjected to resourceful treatment from the source so that a big problem of environmental governance is solved,coal resources are saved, and clean breeding of livestock and poultry and resourceful and clean utilization of the poultry waste are promoted.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of carbon-containing substrates, and in particular relates to a method for cleaning and resource utilization of livestock and poultry waste. Background technique [0002] The sustainable and stable development of my country's animal husbandry has effectively guaranteed the supply of agricultural and sideline products, but untreated livestock and poultry waste has become a major problem in environmental governance. The waste contains nitrogen, sulfur, phosphorus and pathogenic bacteria, and the amount of pollutants is large and concentrated. [0003] Vigorously promoting clean breeding of livestock and poultry, promoting the reduction of waste at the source, and promoting the resource utilization of livestock and poultry waste is a hard task with a clear time limit. [0004] At present, livestock and poultry waste is mainly processed through composting, but composting technology is gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48
CPCC10J3/485C10J2300/093C10J2300/0946C10J2300/0959Y02P20/10
Inventor 白永辉宋旭东王焦飞马萌路广华于广锁
Owner NINGXIA UNIVERSITY
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