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Preparation method of sludge-straw composite biomass activated carbon

A biomass and activated carbon technology, applied in carbon compounds, chemical instruments and methods, inorganic chemistry, etc., to reduce production costs and improve quality

Active Publication Date: 2020-07-28
SHANGHAI RES INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a preparation method of sludge-straw composite biomass activated carbon to solve the problem of resource treatment of municipal sludge and agricultural waste, and to obtain a sludge-based biomass activated carbon with excellent performance

Method used

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  • Preparation method of sludge-straw composite biomass activated carbon
  • Preparation method of sludge-straw composite biomass activated carbon
  • Preparation method of sludge-straw composite biomass activated carbon

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preparation example Construction

[0033] The invention provides a preparation method of sludge-straw composite biomass activated carbon, see figure 1 shown, including the following steps:

[0034] (1) Using municipal sludge as the main raw material, agricultural waste as an auxiliary material, and wood tar as a binder, fully kneading, granulating and drying to obtain sludge-stalk composite granules;

[0035] (2) Feed the sludge-straw composite particles into the carbonization furnace, and simultaneously carbonize and activate them under anaerobic or oxygen-limited conditions to obtain sludge-based biomass activated carbon and pyrolysis gas. Among them, sludge-based biomass Activated carbon is packaged after cooling;

[0036] (3) After the pyrolysis gas is dedusted and purified, wood tar, wood vinegar and non-condensable gas are obtained. Among them, the non-condensable gas is returned to the carbonization furnace as fuel, and the wood vinegar is partially returned and sprayed into the carbonization furnace as...

Embodiment 1

[0054] A preparation method of sludge-straw composite biomass activated carbon, the specific operation steps are: the dry sludge containing 28% of organic matter and 20% of water is ground and sieved to 100 meshes, and wheat straw is crushed and sieved to 100 meshes; The mass percentage of straw and wood tar is 80%, 15% and 5% for granulation. First, the sludge and wheat straw are mixed and kneaded, and then wood tar is added for kneading. The kneaded raw materials are granulated with a diameter of 8mm, dried, and the granules are The material is transported to the carbonization and activation furnace, where carbonization and activation are carried out under anaerobic, system slight negative pressure (-50Pa), temperature 600°C, and sludge-based biomass activated carbon is obtained after cooling.

[0055] In this embodiment, the injection amount of the activator wood vinegar is 8% of the mass of the sludge-stalk composite particles.

Embodiment 2

[0057] A preparation method of sludge-straw composite biomass activated carbon, the specific operation steps are: the dry sludge containing 20% ​​of organic matter and 25% of water is ground and sieved to 100 mesh, rapeseed straw is crushed and sieved to 100 mesh, according to the sludge, rapeseed The mass percentage of straw and wood tar is 85%, 10% and 5% for granulation. Firstly, the sludge and rape straw are mixed and kneaded, and then wood tar is added for kneading. The kneaded raw materials are granulated with a diameter of 6mm, dried, and the granules The material is transported to the carbonization and activation furnace, where carbonization and activation are carried out under anaerobic system pressure of 100Pa and temperature of 650°C, and sludge-based biomass activated carbon is obtained after cooling.

[0058] In this embodiment, the injection amount of the activator wood vinegar is 5% of the mass of the sludge-stalk composite particles.

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Abstract

The invention relates to a preparation method of sludge-straw composite biomass activated carbon, which comprises the following steps (1) sufficiently mixing and kneading municipal sludge as a main raw material, agricultural waste as an auxiliary material and wood tar as a binder, granulating, and drying to obtain sludge-straw composite particles, (2) feeding the sludge-straw composite particles into a carbonization furnace, carbonizing and activating at the same time under an oxygen-free or oxygen-limited condition to obtain a product sludge-based biomass activated carbon and pyrolysis gas, cooling the sludge-based biomass activated carbon, and packaging the cooled sludge-based biomass activated carbon, and (3) performing dust removal and purification on the pyrolysis gas to obtain wood tar, wood vinegar and non-condensable gas, returning the non-condensable gas as fuel to the carbonization furnace, returning a part of the wood vinegar as an activating agent to be sprayed into the carbonization furnace, and recycling the wood tar as a granulation raw material. The activated carbon is prepared from the sludge and the agricultural straw, the preparation method is simple, the price is relatively low, good economic benefits and ecological benefits are achieved, and high market competitiveness and popularization value are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource-based treatment, and relates to a preparation method of sludge-straw composite biomass activated carbon. Background technique [0002] In 2017, China's demand for activated carbon reached 690,000 tons. As the main raw materials for the manufacture of activated carbon, coconut shells, fruit shells, wood and coal are now in short supply, and there is an urgent need to solve alternative raw materials. [0003] Since sludge contains a large amount of organic matter and its organic carbon content is high, it has some similarities with the traditional preparation of activated carbon materials. The preparation of activated carbon from sludge as a raw material has attracted widespread attention as a new method of sludge treatment. Sludge replaces coal, wood, and fruit shells to prepare activated carbon, which reduces the cost of raw materials and improves the utilization rate of sludge. It no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342
CPCC01B32/324C01B32/342
Inventor 李泓李森许明言张杨徐思遥张宏玲宋一帆唐俊杰殷曰彩陈杲
Owner SHANGHAI RES INST OF CHEM IND
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