KR100769012B1 - Method of Appyloligneous acid extraction and it's refining - Google Patents

Abstract

The present invention is to collect the smoke generated from the charcoal kiln to extract the wood vinegar solution to control the internal temperature of the charcoal kiln to remove toxic substances and condensed while passing the smoke pipe through which the coolant is circulated through the smoke pipe to which the smoke is moved It relates to the extraction and purification method of wood vinegar to remove the tar and impurities in order to obtain a high quality wood vinegar,

That is, while maintaining the temperature of the process in which the carbon is carbonized in the charcoal pyrolysis process to be less than 420 ℃ but the temperature of the smoke pipe to which the collected smoke is moved to maintain a range of 70 ~ 120 ℃, inflow through the smoke pipe Extracting wood vinegar by forcing the smoke to pass through the flue gas passage installed in the condenser through which the coolant is circulated by the driving of the pump and extracting wood vinegar; Purifying wood vinegar first by sedimentation by introducing into the settling tank, and transferring the first purified wood vinegar from the sedimentation tank to a cooling device and passing it through a filter equipped with a micro filter in a state of cooling to low temperature. Second purification step to remove the oil or impurities contained in the distillation tank, distillation of the secondary purified wood vinegar at least once W is methyl alcohol to purified such that residual to less than 50ppm.

Charcoal Kiln, Wood Vinegar, Carbonization, Purification

Description

Method of Appyloligneous acid extraction and it's refining

1 is a schematic cross-sectional view showing an example of a typical charcoal kiln,

Figure 2 is a cross-sectional view showing a device for firstly extracting the wood vinegar solution of the present invention,

3 is a schematic view showing a secondary purification method of wood vinegar of the present invention,

Figure 4 is a schematic diagram of a purification method for distilling the wood vinegar of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: charcoal kiln 11: smoke pipe

20 condenser 21 pump

22: flue gas passage 30: sedimentation tank

31: splitter plate 32: valve

33: overflow pipe 40: cooling device

50: filter 51: micro filter

60: distillation tank 61: cooler

The present invention is to extract the wood vinegar and its purification method, more specifically, to collect the smoke generated from the charcoal kiln when extracting the wood vinegar to remove the toxic substances by controlling the internal temperature of the charcoal kiln and the smoke to move the smoke pipe The present invention relates to a method of extracting and purifying wood vinegar, which is condensed while forcibly passing the circulating flue gas passage to remove tar and impurities, thereby obtaining high quality vinegar.

In general, the smoke emitted during the carbonization process of applying heat to burn charcoal in a charcoal kiln contains a large amount of water, wood vinegar, tar, and various gases. Among them, wood vinegar is an acidic liquid containing acetic acid as a main component. It is actively used for agriculture, medicine and drinks.

The main components of wood carbonized in charcoal are composed of cellulose which is carbohydrate and lignin which is hydrocarbon, and pyrolysis of each component occurs in the process of increasing combustion temperature, cellulose component at about 200 ℃ and lignin at 300 ~ 400 ℃ do.

When the carbonization process is regarded as a state of smoke, moist smoke with a lot of water vapor is generated in the early stage of combustion, while the temperature rises, the cellulose component is carbonized, so that the coal irritates the nose. In this step, if the inlet except for the vent of the kiln is closed, the combustion temperature is further increased, the lignin starts to be pyrolyzed, and the color of the smoke becomes light, and carbonization is completed. The liquid obtained by cooling the smoke generated in the process is recovered, and there is a big difference in the composition and properties of wood vinegar according to the color of the smoke.

Such wood vinegar contains a large amount of crops such as tar, methanol, and phenol, or harmful substances such as benzopyrene, which is classified as a carcinogenic substance and contains harmful ingredients to the human body. The quality standards of woody liquor as shown in Figure 1 have been published.

Wood quality standards division Raw material Boomerbijou (° Be) Acid amount (%) pH Melt Tar (%) Index of Refraction (% Brix) Visual discrimination Traditional charcoal kiln softwood 0.6 to 5.5 1.5 to 5.0 3.5 or less 2.0 or less 3.5 or more Maroon, transparent Hardwood 0.6 to 2.5 3.0 to 6.5 3.5 or less 1.5 or less 3.5 or more Maroon, transparent Applied Charcoal Kiln softwood 1.0 to 5.5 2.0 to 5.0 3.5 or less 2.0 or less 5.0 or more Maroon, transparent Hardwood 1.0 to 2.5 4.0-7.0 3.5 or less 1.5 or less 5.0 or more Maroon, transparent Mechanical carbonization furnace softwood 2.5 to 5.5 2.3 to 5.5 3.5 or less 5.0 or less 7.0 or higher Maroon, transparent Hardwood 2.5 to 5.5 4.5 to 9.0 3.5 or less 5.0 or less 7.0 or higher Maroon, transparent Distilled wood softwood 0.0 to 2.5 0.8 or more 3.5 or less 0.3 or less 0.8 or more Pale yellow, transparent Hardwood 0.0 to 5.5 1.0 or higher 3.5 or less 0.3 or less 0.8 or more Pale yellow, transparent

※ The quality standards of bamboo vinegar based on bamboos are based on the hardwood standard.

However, the conventional method for purifying wood vinegar extract extracts light oil, wood vinegar and tar by inducing layer separation by specific gravity between the components of wood vinegar while still standing for several months to a year with wood vinegar collected. As it takes a long time, productivity was lowered. Especially, purified wood vinegar contained harmful ingredients such as phenol, methanol, cresol, and benzopyrene. Therefore, special processing was performed to ensure safety by removing harmful ingredients for edible use. There was also a problem that had to go further.

The present invention has been made in view of the above problems in purifying conventional wood vinegar, the object of which is to remove the harmful components in the extraction process of wood vinegar and then proceed with purification and distillation in order to shorten the processing period It is to provide a method of extraction and purification of wood vinegar.

In order to achieve the above object, the present invention is to maintain the temperature of the process of carbonization and pyrolysis in charcoal kiln to 420 ℃ or less while maintaining the temperature of the smoke pipe to move the collected smoke in the range of 70 ~ 120 ℃ And extracting wood vinegar by forcibly condensing the smoke flowing through the smoke pipe while driving the pump through a flue gas passage installed in the condenser through which the coolant is circulated, and extracting wood vinegar liquor through the flue gas passage. Purifying wood vinegar first by precipitation by allowing the upper surface to flow into the settling tank having a slanted partition plate, and transferring the first purified wood vinegar from the settling tank to a cooling device and cooling it to a low temperature in a micro filter. The second purification step of removing the oil or impurities contained in the liquid by passing through a filter equipped with, the second purified wood vinegar Distilling at least once or more in a distillation tank, it characterized in that the tablets so that the methyl alcohol residue to less than 50ppm.

Hereinafter, with reference to the accompanying drawings, the extraction and purification method of the wood vinegar of the present invention will be described.

1 is a cross-sectional schematic view showing an example of a typical charcoal kiln, Figure 2 is a cross-sectional configuration diagram showing a device for firstly extracting the wood vinegar solution of the present invention, Figure 3 is a schematic diagram showing a secondary purification method of the wood vinegar solution, 4 is a schematic view of a purification method for distilling the wood vinegar solution.

The present invention controls the heat of combustion so that the internal temperature of the charcoal kiln is maintained at 420 ° C. or less when the carbon is burnt with charcoal in the charcoal kiln 10, and the temperature of the smoke pipe 11 in which the smoke generated from the charcoal kiln is collected is 70. By maintaining in the range of ~ 120 ℃ to prevent the generation of benzopyrene, a carcinogen that may be contained in the extracted wood vinegar when carbonized at a temperature of more than 420 ℃ in charcoal kiln.

The smoke containing water vapor collected through the smoke pipe 11 is passed through the flue passage 22 installed in the condenser 20 through which the coolant is circulated forcibly by the driving of the pump 21 and saturated by condensation. Extraction of the liquid to obtain the wood vinegar, the lower part of the flue gas passage 22 is installed in the sedimentation tank 30 with a split plate 31 is inclined upper surface so that the extracted wood vinegar flows to precipitate the wood vinegar composition The wood vinegar is first purified to separate.

The lower end of the sedimentation tank (30) is provided with a valve 32 for discharging the sediment, the upper side of the sedimentation tank 30, the overflow pipe (33) so that the injured wood vinegar overflowed (over-floW) ) Is provided, wherein the wood vinegar overflowed through the overflow pipe in the settling tank 30 is preferably passed through at least one more settling tank to increase the purification efficiency.

The first purified wood vinegar from the settling tank 30 is passed through a filter 50 having a micro filter 51 in a state of being cooled to low temperature through a cooling device 40 maintaining a constant temperature by a freon refrigerant. The secondary purification is completed by removing the oil or impurities contained in the liquid.

In the second purification step, a plurality of filters 50 may be installed, but the degree of mesh of the micro filter 51 provided in each filter may be sequentially densified and purified.

Secondary purified wood vinegar is supplied to the distillation tank 60 to be distilled at least once or more to purify the methyl alcohol to 50ppm or less, and when the distillation after one distillation again via a cooler (61) After the conversion to room temperature was carried out to increase the distillation efficiency.

Therefore, the present invention as described above is controlled to maintain the carbonization temperature of the charcoal kiln (10) and the temperature of the smoke pipe to collect the smoke generated during the carbonization process when burning charcoal to the human body from the preparation step for extracting the wood vinegar solution Harmful components can be eliminated at source, and then, in consideration of the characteristics of wood vinegar, the secondary purification by precipitation method, secondary purification by collection of micro filter at low temperature, and tertiary purification by distillation at high temperature are consistent. The process is complete.

Such extraction and purification method of the wood vinegar of the present invention, by controlling the internal temperature of the charcoal kiln when the wood is carbonized in the charcoal has the effect of removing toxic substances in advance, various methods to suit the characteristics of the extracted wood vinegar There is an economical advantage to mass-produce high-quality wood vinegar by removing harmful components through the multi-stage purification.

Claims (3)

Maintaining the temperature of the process in which the wood is carbonized and pyrolyzed in the charcoal kiln 10 to 420 ℃ or less while maintaining the temperature of the smoke pipe (11) in which the collected smoke is moved to 70 ~ 120 ℃ range, And condensing the smoke introduced through the engine 11 while forcibly passing the flue gas passage 22 installed in the condenser 20 through which the coolant is circulated by the driving of the pump 21 to extract wood vinegar liquid, Purifying the wood vinegar solution by primary precipitation into the settling tank 30 having a split plate 31 having an inclined upper surface of the wood vinegar extracted through the flue gas passage 22, and the settling tank 30 The second purified step of removing the oil or impurities contained in the liquid by passing through the filter 50 equipped with a micro filter 51 in a state where the first purified wood vinegar solution from the first to the cooling device 40 and cooled to a low temperature; The second purified wood vinegar Extraction and purification method of wood vinegar, characterized in that the distillation tank (60) by distillation at least once or more to purify the methyl alcohol to 50ppm or less. According to claim 1, wherein the lower end of the settling tank 30 is provided with a valve 32 for discharging the sediment, the upper side of the settling tank 30 will be overflowed (floating) the injured wood vinegar An overflow pipe (33) is provided so that the wood vinegar overflowed through the overflow pipe (33) is passed through another settling tank, characterized in that the extraction of wood vinegar and its purification method. The filter 50 according to claim 1, wherein a plurality of filters 50 are installed in a step of performing secondary purification by passing through a filter 50 having a micro filter 51 in a state of being cooled to a low temperature through the cooling device 40. Extracting and purification method of wood vinegar, characterized in that to refine by sequentially densely mesh (mesh) of the micro filter 51 provided in each filter.

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