Method for reducing wood tar in preparation process of wood vinegar

A technology for wood vinegar and wood tar, applied in the field of wood vinegar, can solve the problems of complicated process for removing wood tar, unfavorable wood vinegar refining, high purity of wood vinegar, and achieves a technology with rich raw materials, few impurities and high purity. Effect

Inactive Publication Date: 2015-12-09
SHAOXING TEXTILE MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: A large amount of wood tar will be produced in the current preparation process of wood vinegar, and the process of removing wood tar is complicated, which is not conducive to the refining of wood vinegar, and a process for preparing wood vinegar is provided. In the method of reducing wood tar, this method uses waste wood to be crushed into granules and put into the fermentation tank, and some substances are added to carry out anaerobic fermentation. A layer of millet is spread under the high-temperature furnace, and then the fermented and air-dried wood granules are pile

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] First select 1kg of waste wood, put it in a pulverizer and pulverize it into 2cm particles, put the particles into the fermentation tank, and moisten it with water, soak 50% of the wood in water, and then add 20% acetic acid by wood mass to the tank. Ethyl ester, wood mass 3% sodium thiosulfate and wood mass 1% cellulase, and stir and mix evenly, control the temperature in the fermentation tank to 38 ℃ for sealed anaerobic fermentation for 4 days; remove the fermented wood particles from Take it out of the trough and place it in the sun to dry naturally until the moisture in the wood particles reaches 8%, and then bag it for collection; first spread a layer of millet with a thickness of 2cm under the high-temperature furnace, and then stack the millet with a thickness of 10cm above Sun-dried wood pellets, and finally spread a layer of rice bran with a thickness of 6cm on the wood pellets. The high-temperature furnace heats up at a rate of 10℃ / min, and co...

Example Embodiment

[0022] Example 2

[0023] First select 1.5kg of waste wood, put it into a grinder and smash into 3cm particles, put the particles into the fermentation tank, and wet with water, so that 55% of the wood is soaked in water, and then add 25% of the wood mass into the tank. Ethyl acetate, wood mass 4% sodium thiosulfate and wood mass 2% cellulase are mixed and mixed uniformly. The temperature in the fermentation tank is controlled to 45°C for sealed anaerobic fermentation for 4.5 days; the fermented wood pellets Take it out of the trough and place it in the sun to dry naturally until the moisture in the wood particles reaches 9%, and then bag it for collection; first spread a layer of millet with a thickness of 2.5cm under the high-temperature furnace, and then stack the millet with thickness 13cm of the above-mentioned sun-dried wood particles, and finally a layer of rice bran with a thickness of 7cm is evenly spread on the wood particles. The high-temperature furnace is heated at a...

Example Embodiment

[0025] Example 3

[0026] First select 2kg of waste wood, put it in a pulverizer and pulverize it into 4cm particles, put the particles into the fermentation tank, and moisten with water, soak 60% of the wood in water, and then add 30% acetic acid by wood mass to the tank. Ethyl ester, wood mass 5% sodium thiosulfate and wood mass 3% cellulase, and stir and mix uniformly, control the temperature in the fermentation tank to 55 ℃ for sealed anaerobic fermentation for 5 days; remove the fermented wood particles from Take it out of the trough and place it in the sun to dry naturally until the moisture in the wood particles reaches 10%, then bag it for collection; first spread a layer of millet with a thickness of 3cm under the high-temperature furnace, and then stack the millet with a thickness of 15cm The dried wood pellets, and finally a layer of 8cm thick rice bran is evenly spread on the wood pellets. The high-temperature furnace heats up at a rate of 10℃ / min, and collects them a...

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Abstract

The invention relates to a method for reducing wood tar in the preparation process of wood vinegar, which belongs to the field of wood vinegar. Aiming at the defects that since a large amount of wood tar is generated in the preparation process of the wood vinegar, and the removing process of the wood tar is complex, the refining of the wood vinegar is disadvantageous, the invention provides the method for reducing the wood tar in the preparation process of the wood vinegar. The method comprises the following steps of crushing wood into particles and then placing the particles in a fermentation tank for fermenting; laying a layer of millets below a high-temperature furnace; stacking the wood particles on the millets; spraying rice bran on an upper layer; collecting at three temperature intervals to obtain crude wood vinegar; performing reduced pressure distillation to remove water and then sealing and standing; adding a NaCl solid in the liquid for hydraulic freezing treatment and filtering; extracting the obtained wood vinegar with diethyl ether and recovering to prepare the refined wood vinegar. According to the method, the wood tar in the wood vinegar in the preparation process can be effectively removed, and the finally-prepared wood vinegar is high in purity and less in impurity; in addition, the method is simple in process and low in cost.

Description

technical field [0001] The invention relates to a method for reducing wood tar in the process of preparing wood vinegar, belonging to the field of wood vinegar. Background technique [0002] Wood vinegar is a reddish-brown liquid with a smoky smell obtained after condensation and separation of the steam and gas mixture exported from the wood distillation equipment. It is mainly acetic acid and contains alcohol, phenol, ketone, aldehyde and its derivatives, etc. mixture of substances. Because wood vinegar has the functions of killing insects, sterilizing bacteria, disinfecting soil, eliminating fecal odor, preserving freshness, promoting the growth of plants and edible fungi, it has been widely used in Japan, South Korea and other countries in recent years. [0003] Wood vinegar is mainly composed of water, methanol, formaldehyde, acetone, acetic acid, furfural, phenol and other alcohols, acids, phenols and ketone-aldehyde organic compounds. Among the organic matter, the co...

Claims

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Application Information

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IPC IPC(8): C10C5/00C10B57/00C10K1/00
CPCY02E50/10
Inventor 郭迎庆王志慧林大伟
Owner SHAOXING TEXTILE MACHINERY GRP
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