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Novel method for utilizing rubber wood timber brushwood and slab sawdust

A technology of rubber wood, new methods, applied in chemical instruments and methods, applications, special forms of dry distillation, etc.

Inactive Publication Date: 2012-09-26
闫涛 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention uses rubber wood processing waste twigs, shavings, and wood chaff as raw materials, proposes a process for preparing regular-shaped biochar and high specific surface area activated carbon, and uses charcoal ash after burning rubber wood biochar to prepare The technology of compound fertilizer has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0010] 1. Preparation steps of activated carbon with high specific surface area

[0011] (1) Mixing of raw materials: Mix the rubber wood chaff and the catalyst in proportion for 30-120 minutes; the weight ratio between the wood chaff and the catalyst is 1:1-4.

[0012] The wood bran in the raw material is 10-100 mesh and the water content is 5-10%; the catalyst is phosphoric acid with a concentration of 30-85%.

[0013] (2) Drying: the mixture in step (1) is dried at 80-125°C.

[0014] (3) Activation: activate the product obtained in step (2) in an environment of 400-550° C., and the activation time is 30-90 minutes.

[0015] (4) Catalyst recovery: the product of step (3) is subjected to catalyst recovery, and the recovery adopts a countercurrent recovery method until the catalyst content in the solution is <1%. The concentration of phosphoric acid in the recovery solution is 10%-35%.

[0016] (5) Rinsing: the product of step (4) is rinsed with clear water.

[0017] (6) d...

Embodiment 1

[0028] Example 1: Choose wood powder with a mesh size of 30-100 mesh, add 70% phosphoric acid solution, and mix the dry weight of wood powder with phosphoric acid in a mixer in a ratio of 1:4. After keeping for 0.5 hours, transfer it to a drying device and dry it at 120°C. It was then activated in a rotary kiln at 500°C for 60 minutes. During the reaction process, the tail gas generated in the activation process is recovered by using the spraying process. The phosphoric acid is recovered by means of countercurrent recovery of the activated product until the phosphoric acid content in the washing solution is 2 / g of activated carbon. The low-concentration phosphoric acid obtained in the reaction process, rinsing process and spraying process will be used in the preparation process of compound fertilizer, so as to realize the environmental protection needs of no pollution to the environment and no waste water discharge in the process of activated carbon production.

Embodiment 2

[0029] Example 2: The crushed rubber wood powder of the waste is dried in a drying furnace so that the moisture content of the wood powder is lower than 5%. It is sent to a large carbonization furnace through a conveyor for carbonization, and is kept at 200°C for 0.1 hour to remove the generated water vapor. Then it was raised to 500°C to continue carbonization for 0.2 hours and then cooled to obtain rubber charcoal powder. The gas generated during the carbonization process was collected and entered into a condensation tower to obtain rubber wood-based biomass oil.

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PUM

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Abstract

The invention discloses a novel method for utilizing rubber wood timber brushwood and slab sawdust. The novel method comprises the following steps of: screening and crushing brushwood, wood shavings, slab sawdust and the like to obtain rubber wood powder, mixing the rubber wood powder with catalyst phosphoric acid according to the weight ratio of 1:(1-4), preparing active carbon with specific surface area of 1600m<2> through drying, activating, washing and stoving processes, and simultaneously recovering the catalyst; adding the wood powder to a carbonization furnace, and preparing rubber wood biomass powdered carbon by utilizing a slow-speed pyrolysis process; simultaneously, recovering combustible gas separated from pyrolysis gas in a pyrolysis process in a condensation manner so that the combustible gas is applied to an active carbon preparation process; mixing biomass oil which is liquid condensed from the pyrolysis gas with biomass powdered carbon, and carrying out extrusion forming by utilizing a mould to prepare various specifications of biomass carbon; and treating residual ash after biomass carbon combustion by utilizing recovered phosphoric acid with the concentration of 10-40% in an active carbon preparation process to obtain a liquid compound fertilizer and a grain fertilizer with adjustable proportion of potassium to phosphorus. The invention relates to a comprehensive utilization process route for producing high-specific-surface-area activated carbon, sectional carbon and compound fertilizer by taking brushwood, wood shavings and slab sawdust, generated by a rubber wood treating process, as raw materials.

Description

technical field [0001] The invention belongs to the comprehensive utilization of forestry processing waste, and in particular relates to a comprehensive process for preparing biomass carbon, activated carbon and compound fertilizer by using rubber wood processing waste branch wood and veneer chaff. Background technique [0002] my country's biomass resources are very rich, and the comprehensive utilization of biomass waste is an important research field. As an economic species of rubber trees, taking Hainan Province as an example, more than 1 million rubber trees are renewed every year, and a large amount of residues such as branch wood, shavings, and veneer chaff are produced during the processing process, of which veneer chaff accounts for about 50% , shaving wood accounted for 20% saving, branch wood accounted for about 30%. These wastes are of various shapes, which brings inconvenience to further processing and utilization. The traditional combustion method will seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C10B53/02C10B57/02C10L5/44C05G1/00C01B32/324C01B32/342
CPCY02E50/30Y02E50/14Y02E50/10
Inventor 闫涛郭玉鹏
Owner 闫涛
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