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Method for preparing desulfurization denitration agent, methanol and acetone by biomass pyrolysis

A biomass pyrolysis, desulfurization and denitrification technology, applied in the field of biomass energy utilization, can solve problems such as environmental pollution

Active Publication Date: 2013-04-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new method for preparing desulfurization and denitrification agent, and simultaneously co-produce two chemicals, methanol and acetone, to overcome the possible environmental pollution in the process of directly using biomass pyrolysis liquid products to prepare solid desulfurization and denitrification agent and other defects

Method used

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  • Method for preparing desulfurization denitration agent, methanol and acetone by biomass pyrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Naturally air-dried poplar wood is used as raw material, crushed to an average particle size of 0.5 mm, the material is sent to a pyrolysis reactor in a nitrogen atmosphere, and rapidly pyrolyzed at 500 ° C for 20 seconds, and the generated pyrolysis gas is passed into a fixed In the bed calcium oxide reactor, the bed height is 0.5m, the flow velocity of the pyrolysis gas leaving the fixed bed reactor is 0.03m / s, the temperature is 80°C, the experiment lasts for 30min, and finally the pyrolysis gas is condensed to room temperature 20 °C, the liquid product was collected.

[0024] The material was taken out from the calcium oxide reactor and cooled to room temperature, and used for desulfurization and denitrification experiments. The results showed that the desulfurization efficiency reached 96%, and the denitrification efficiency reached 58%.

[0025] The yield of the liquid product was 8.0%. The contents of methanol and acetone were analyzed by gas chromatography, and ...

Embodiment 2

[0027] Naturally air-dried poplar wood is used as raw material, crushed to an average particle size of 0.5mm, and the material is sent to a pyrolysis reactor for rapid pyrolysis at 600°C in an inert gas atmosphere (permanent gas obtained from the experiment is used as a protective gas) In 10 seconds, the generated pyrolysis gas was passed into the fixed-bed calcium oxide reactor with a bed height of 0.4m. The flow rate of the pyrolysis gas when leaving the fixed-bed reactor was 0.02m / s, and the temperature was 70°C. The experiment continued After 30 minutes, the pyrolysis gas was finally condensed to a room temperature of 20°C, and the liquid product was collected.

[0028] The material was taken out from the calcium oxide reactor and cooled to room temperature, and used for desulfurization and denitrification experiments. The results showed that the desulfurization efficiency reached 97%, and the denitrification efficiency reached 60%.

[0029] The yield of the liquid product...

Embodiment 3

[0031] Naturally air-dried pine wood is used as raw material, crushed to an average particle size of 0.4mm, and the material is sent to a pyrolysis reactor for rapid pyrolysis at 400°C for 30s in an inert gas atmosphere (the permanent gas obtained in the experiment is used as a protective gas) , the generated pyrolysis gas is passed into the fixed bed calcium oxide reactor, the bed height is 0.5m, the flow rate of the pyrolysis gas when leaving the fixed bed reactor is 0.02m / s, the temperature is 70°C, and the experiment lasts for 30min , and finally condense the pyrolysis gas to a room temperature of 20°C, and collect the liquid product.

[0032] The materials were taken out from the calcium oxide reactor and cooled to room temperature, and used for desulfurization and denitrification experiments. The results showed that the desulfurization efficiency reached 97%, and the denitrification efficiency reached 55%.

[0033] The yield of the liquid product was 5.5%. The contents o...

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Abstract

The invention belongs to the field of utilization of biomass energy, and particularly relates to a method for preparing a desulfurization denitration agent, methanol and acetone by biomass pyrolysis. The preparation method comprises the following steps of: performing quick pyrolysis on biomass at the temperature of between 300 and 800 DEG C under limited oxygen supply or anaerobic condition, thenintroducing the high-temperature pyrolysis gas into a reactor filled with calcium oxide, gradually cooling the pyrolysis gas to the temperature of between 70 and 120 DEG C at enough residence time, performing the reactions such as cracking, condensation polymerization and the like under the action of the calcium oxide, performing the reactions such as adsorption, neutralization and the like on the pyrolysis gas and the calcium oxide, and finally, condensing the pyrolysis gas to room temperature and collecting a liquid product. The solid desulfurization denitration agent can be obtained after the material in the calcium oxide reactor is cooled to the room temperature, and the liquid product contains two chemicals, namely the methanol and the acetone. The production of the desulfurization denitration agent, the methanol and the acetone is realized in a thermal treatment mode by using the biomass and the calcium oxide as raw materials; and the method is low in production cost, and has important significance for the utilization of the large-scale biomass energy.

Description

technical field [0001] The invention belongs to the field of utilization of biomass energy, and in particular relates to a method for preparing desulfurization and denitration agents, methanol and acetone by pyrolysis of biomass. Background technique [0002] All living organisms that can grow are collectively referred to as biomass, including plants, animals and microorganisms. At present, the biomass resources available for development and utilization are mainly lignocellulosic biomass of various agricultural and forestry wastes. Lignocellulosic biomass generally consists of three main components: cellulose, hemicellulose and lignin, as well as a small amount of ash and extracts. When biomass is rapidly decomposed by heat under limited oxygen supply or anoxic conditions, three products, gas, liquid and solid, will be formed. The composition of the liquid product is very complex, mainly including a large amount of water, organic acids, aldehydes, ketones, furan substances,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/60C07C27/00C07C29/00C07C31/04C07C49/08C07C45/51
CPCY02E50/32Y02E50/30
Inventor 陆强董长青张旭明张志飞张俊姣田慧云杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)