CN117210233A - Biochar preparation system and method for preparing biochar by using same - Google Patents
Biochar preparation system and method for preparing biochar by using same Download PDFInfo
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- CN117210233A CN117210233A CN202311199161.3A CN202311199161A CN117210233A CN 117210233 A CN117210233 A CN 117210233A CN 202311199161 A CN202311199161 A CN 202311199161A CN 117210233 A CN117210233 A CN 117210233A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 78
- 238000000926 separation method Methods 0.000 claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 35
- 235000021419 vinegar Nutrition 0.000 claims abstract description 21
- 239000000052 vinegar Substances 0.000 claims abstract description 21
- 239000002023 wood Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000000197 pyrolysis Methods 0.000 claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010902 straw Substances 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003337 fertilizer Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- UHPMCKVQTMMPCG-UHFFFAOYSA-N 5,8-dihydroxy-2-methoxy-6-methyl-7-(2-oxopropyl)naphthalene-1,4-dione Chemical compound CC1=C(CC(C)=O)C(O)=C2C(=O)C(OC)=CC(=O)C2=C1O UHPMCKVQTMMPCG-UHFFFAOYSA-N 0.000 description 1
- 241000223218 Fusarium Species 0.000 description 1
- 241000228143 Penicillium Species 0.000 description 1
- 241001361634 Rhizoctonia Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000008636 plant growth process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Landscapes
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of carbon fertilizer production, and discloses a biochar preparation system and a method for preparing biochar by using the same. The biochar preparation system comprises: the device comprises a combustion chamber, an anaerobic dry distiller, a cyclone separator, a separation tower and a tar and wood vinegar separator. The biochar preparation system has the advantages of simple structure and low manufacturing cost; through the design and optimization of the structure, the generated combustible gas and tar can be fully utilized, the energy can be fully recovered, the supply of external fuel is reduced, and 80% -95% of external fuel is replaced. In addition, the biochar preparation system can greatly reduce emission of carbon dioxide, flue gas and the like, and is beneficial to environmental protection. The preparation method of the biochar provided by the invention has the advantages of high efficiency and high yield, and can obtain high-quality biochar and wood vinegar simultaneously; tar and combustible gas generated in the preparation process can continuously supply heat for the anaerobic dry distillation device.
Description
Technical Field
The invention belongs to the technical field of carbon fertilizer production, and particularly relates to a biochar preparation system and a method for preparing biochar by using the same.
Background
Along with popularization and application of the comprehensive straw utilization technology, the preparation of the straw into the biochar becomes one of the important points of research. Biochar is a stable form of carbon material obtained by partial oxidation of biomass feedstock at high temperatures. The method has wide application value, such as being used in the fields of soil improvement, carbon fixation, emission reduction, water quality purification, energy storage and the like. In the agricultural field, the biochar can improve the acidity and alkalinity of soil, improve the fertilizer and water retention capacity of the soil, activate soil microorganisms and promote the absorption of plants to nutrient components, thereby improving the yield and quality of crops; meanwhile, the preparation of the biochar from the straw can solve the problems that the straw is burnt to pollute the atmosphere, the straw is discarded to rot and pollute the water body, and the like. More importantly, carbon sequestration in the earth is one of the best ways to reduce greenhouse gas emissions.
At present, the charcoal prepared from the straw mainly adopts a direct heating mode, the heating mode can be divided into two modes, one is to directly ignite raw materials to serve as a pyrolysis heat source, and the other is to introduce hot flue gas into a pyrolysis furnace by using a hot blast stove to promote the raw materials to react. However, in any mode for preparing the biochar at present, the prepared biochar has poor quality, a large amount of flue gas is discharged even if the biochar is treated, and straw resources cannot be fully utilized. In addition, the existing biochar preparation system is complex in structure and not easy to operate.
Therefore, it is highly desirable to provide a biochar production system that can produce high quality biochar and make full use of straw resources.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a biochar preparation system andby using it A method for preparing biochar. The biochar preparation system provided by the invention not only can prepare high-quality productsThe biomass charcoal is suitable for soil improvement; but also can fully utilize straw resources and reduce smoke emission.
The invention provides a biochar preparation system.
Specifically, a biochar preparation system includes:
the combustion chamber is connected with the burner;
the anaerobic dry distillation device is connected with the combustion chamber and is provided with a feed inlet and a biochar discharge outlet;
the cyclone separator is connected with the combustion chamber and is used for separating gas substances generated by the combustion chamber;
the separation tower is connected with the top of the cyclone separator and is used for separating gas substances separated by the cyclone separator; the top of the separation tower is connected with a combustible gas storage chamber, and the combustible gas storage chamber is connected with the burner;
the tar and wood vinegar separator is connected with the cyclone separator and the bottom of the separation tower; the tar and wood vinegar separator is connected with the wood vinegar storage chamber and the burner.
In the biochar preparation system, an air suction pump is arranged between the cyclone separator and the separation tower.
In the above biochar production system, a cooler and a gas scrubber are further provided between the separation tower and the flammable gas storage chamber.
In the biochar preparation system, the top of the separation tower is connected with the cooler, the top of the cooler is connected with the gas scrubber, and the bottoms of the cooler and the gas scrubber are connected with the flammable gas storage chamber.
In the biochar preparation system, an air suction pump is arranged between the separation tower and the cooler.
In the biochar preparation system, an air suction pump is arranged between the cooler and the gas scrubber.
In the above-mentioned biochar production system, the burner is further connected with a fuel chamber for supplying external fuel.
In the biochar preparation system, the anaerobic retort is a closed internal heating type anaerobic furnace.
Further, the anaerobic dry distiller is one of a rotary furnace, a raking furnace, a stewing furnace or a kiln.
The invention provides a preparation method of biochar.
Specifically, the preparation method of the biochar comprises the following steps:
(1) Adding the straw into an anaerobic dry distiller, and heating by a combustion chamber to perform dry distillation reaction to obtain biochar and gas fractions;
(2) Delivering the gas fraction to a cyclone separator for primary separation to obtain a gas part and a liquid part;
(3) Conveying the gas part to a separation tower for secondary separation to obtain a combustible gas and liquid mixture; conveying the liquid mixture and the liquid part obtained in the step (2) to a tar and wood vinegar separator, and separating to obtain wood vinegar and tar; delivering the tar to a combustion chamber for combustion heating;
(4) And (3) cooling and washing the combustible gas obtained in the step (3), and conveying the combustible gas to a combustion chamber for combustion and heat supply.
In the above preparation method, the temperature of the carbonization reaction is about 400-600deg.C, such as 450deg.C, 500 deg.C.
In the above production method, the combustible gas includes methane, carbon monoxide and hydrogen.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the biochar preparation system provided by the invention, a combustion chamber supplies heat to an anaerobic dry distiller, straw is added into the anaerobic dry distiller and then is subjected to dry distillation to generate biochar and gas fractions, and the gas fractions are subjected to double separation by a cyclone separator and a separation tower to obtain combustible gas, tar and pyroligneous liquor; the combustible gas and tar are conveyed to a combustion chamber for combustion to supply heat for the anaerobic dry distiller. The biochar preparation system has the advantages of simple structure and low manufacturing cost. The biochar preparation system provided by the invention can be used for preparing the biochar, so that not only can the high-quality biochar be obtained, but also high-quality wood vinegar can be obtained, and straw resources can be fully utilized. Meanwhile, the biochar preparation system can fully utilize the generated combustible gas and tar, fully recover energy, reduce the supply of external fuel and replace 80% -95% of external fuel by designing and optimizing the structure. In addition, the biochar preparation system can greatly reduce emission of carbon dioxide, flue gas and the like, and is beneficial to environmental protection.
(2) The preparation method of the biochar is high in efficiency and yield, and can obtain high-quality biochar and wood vinegar simultaneously; tar and combustible gas generated in the preparation process can continuously supply heat for the anaerobic dry distillation device. The preparation method is calculated to prepare the biochar, wherein about 300kg of straw charcoal, 500kg of dry distillation liquid (comprising about 167kg of wood vinegar liquid, 83kg of tar and 250kg of water) and 200 kg of combustible gas can be produced by 1000kg of dried straw.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of a biochar preparation system according to an embodiment of the present invention;
FIG. 2 is a process flow diagram of the preparation of biochar in an embodiment of the invention;
reference numerals illustrate:
a combustion chamber 100, a burner 110, a fuel chamber 120;
anaerobic retort 200, feed inlet 210, biochar discharge outlet 220, biochar cooling chamber 230;
the cyclone separator 300 is provided with a cyclone separator,
a separation column 400, a flammable gas storage 410, a cooler 420, and a gas scrubber 430;
tar, pyroligneous liquor separator 500, pyroligneous liquor reservoir 510.
Detailed Description
An embodiment of the present invention is described in detail below, referring to fig. 1, and provides a biochar preparation system including: a combustion chamber 100 connected to a burner 110; the anaerobic dry distiller 200 is connected with the combustion chamber 100, and a feed inlet 210 and a biochar discharge outlet 220 are arranged on the anaerobic dry distiller 200; a cyclone 300 connected to the combustion chamber 100 for separating gas materials generated from the combustion chamber 100; a separation tower 400 connected to the top of the cyclone 300 for separating the gas materials separated by the cyclone 300; the top of the separation tower 400 is connected with a flammable gas storage chamber 410, and the flammable gas storage chamber 410 is connected with the burner 110; a tar and pyroligneous liquor separator 500 connected to the cyclone 300 and the bottom of the separation tower 400; the tar and pyroligneous separator 500 is connected to the pyroligneous storage chamber 510 and the burner 110. The biochar preparation system provided by the embodiment of the invention supplies heat to the anaerobic dry distiller 200 by the combustion chamber 100, and the straws are added into the anaerobic dry distiller 200 for dry distillation to generate biochar and gas fractions, and the gas fractions are separated by the cyclone separator 300 and the separation tower 400 to obtain combustible gas, tar and pyroligneous liquor; the combustible gas and tar are conveyed to the combustion chamber 100 for combustion to supply heat for the anaerobic retort 200. The biochar preparation system has the advantages of simple structure and low manufacturing cost. The biochar preparation system provided by the embodiment of the invention can be used for preparing the biochar, so that not only can the high-quality biochar be obtained, but also high-quality wood vinegar can be obtained, and straw resources can be fully utilized. Meanwhile, the biochar preparation system can fully utilize the generated combustible gas and tar, fully recover energy, reduce the supply of external fuel and replace 80% -95% of external fuel by designing and optimizing the structure. In addition, the biochar preparation system can greatly reduce emission of carbon dioxide, flue gas and the like, and is beneficial to environmental protection.
In the biochar production system of the present embodiment, the anaerobic retort 200 is a closed internal heating type anaerobic furnace. One of a rotary kiln, a raking kiln, a stewing kiln or a kiln can be selected. Further, the anaerobic dry distillation device 200 is a rotary furnace, the straw is added from the tail part of the rotary furnace, and during the dry distillation reaction, the material is discharged from the tail to the furnace end under the action of centrifugal force and gravity, and the prepared biochar is discharged from a biochar discharge hole 220 of the furnace end. The discharged biochar has higher temperature and can directly enter a biochar cooling chamber 230 connected with a biochar discharging hole 220 for cooling.
In the biochar preparing system of the present embodiment, an air suction pump is provided between the cyclone 300 and the separation tower 400. The suction air pump provides power for the transportation of the gas fraction and also ensures the separation of the gas fraction in the cyclone 300.
In the biochar manufacturing system of the present embodiment, a cooler 420 and a gas scrubber 430 may be further provided between the separation tower 400 and the combustible gas storage chamber 410. Specifically, the top of the separation column 400 is connected to a cooler 420, the top of the cooler 420 is connected to a gas scrubber 430, and the bottom of the cooler 420 and the gas scrubber 430 is connected to a flammable gas storage chamber 410. The cooler 420 cools the combustible gas to be safely stored in the combustible gas storage chamber 410, and the incompletely cooled combustible gas is further scrubbed by the gas scrubber 430, thereby improving the quality of the combustible gas and facilitating energy recovery. In order to facilitate the gas transfer, a suction air pump may be provided between the separation tower 400 and the cooler 420, and between the cooler 420 and the gas scrubber 430. It is understood that the number and power of the air suction pumps is determined by the actual capacity of the biochar preparation system.
In the biochar production system of the present embodiment, the burner 110 is further connected with a fuel chamber 120 for supplying external fuel.
The embodiment of the invention also provides a preparation method of the biochar, which adopts the biochar preparation system to prepare, and the process flow chart is shown in figure 2, and specifically comprises the following steps:
(1) Adding the dried and crushed straws into an anaerobic dry distillation device 200, supplying heat by a combustion chamber 100, and carrying out dry distillation reaction on the straws in the anaerobic dry distillation device 200, wherein the dry distillation reaction temperature is about 450 ℃, so as to obtain biochar and gas fractions;
(2) Delivering the gas fraction to a cyclone 300 for primary separation to obtain a gas fraction and a liquid fraction;
(3) Delivering the gas part to a separation tower 400 for secondary separation to obtain a combustible gas and liquid mixture; conveying the liquid mixture and the liquid part obtained in the step (2) to a tar and wood vinegar separator 500, and separating to obtain wood vinegar and tar; delivering tar to the combustion chamber 100 for combustion heating;
(4) The combustible gas obtained in the step (3) is cooled, washed and conveyed to the combustion chamber 100 for combustion and heat supply.
In the preparation method of the embodiment of the invention, the combustible gas mainly comprises methane, carbon monoxide and hydrogen.
The preparation method for preparing the biochar has high efficiency and high yield, and can prepare high-quality biochar and wood vinegar simultaneously; tar and combustible gases produced during the preparation process may continue to provide heat to the anaerobic retort 200. By calculation, 1000kg of dried straw can produce about 300kg of straw charcoal, 500kg of dry distillation liquid (comprising about 167kg of wood vinegar, 83kg of tar and 250kg of water) and 200 kg of combustible gas by adopting the preparation method provided by the embodiment.
The biochar prepared by the embodiment has the main component of carbon, and straw absorbs plant growth elements from soil, air and moisture in the plant growth process, and remains in the biochar, so that the biochar can be changed into a large, medium and micro total element fertilizer of the soil after being applied to the soil. The biochar prepared in the embodiment can be used together with an organic fertilizer according to the need.
The biochar prepared in the embodiment has important effect in improving soil and crop growth due to the special pores and specific surface area. The fertilizer is applied to agricultural soil, and has the advantages of increasing the water content of the soil, increasing the porosity of the soil, effectively reducing the soil capacity, improving the proportion relation of water storage, soil particles and air storage pores in soil gaps, improving the temperature of a soil plough layer, increasing the conductivity of the soil, increasing the adsorption of nutrient ions and the like.
The preparation method of the biochar provided by the embodiment of the invention not only can change waste into valuable to prepare high-quality biochar, but also can obtain wood vinegar, so that straw resources are fully utilized. The wood vinegar can be used for foliar fertilizer of agricultural and forestry crops, and disinfection inhibitors of soil harmful mold, such as removing humic substances, penicillium, rhizoctonia, paniculata, fusarium and the like. The wood vinegar can also adjust the pH value of soil.
It should be noted that in the description of the present invention, if an azimuth or positional relationship is indicated in relation to an azimuth description, for example, up, down, front, rear, left, right, etc., the azimuth or positional relationship is based on that shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured or operated in a specific azimuth, and should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and above, below, within, etc. are understood to include the present number. If any, first or second, etc. are described for the purpose of distinguishing between technical features only and not for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the invention, unless explicitly defined otherwise, terms such as arrangement, mounting, connection, etc. should be construed broadly and the specific meaning of the terms in the invention can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A biochar production system, comprising:
a combustion chamber (100) connected to the burner (110);
the anaerobic dry distillation device (200) is connected with the combustion chamber (100), and a feed inlet (210) and a biochar discharge outlet (220) are arranged on the anaerobic dry distillation device (200);
a cyclone separator (300) connected to the combustion chamber (100) for separating gaseous substances generated by the combustion chamber (100);
a separation tower (400) connected to the top of the cyclone separator (300) for separating the gas materials separated by the cyclone separator (300); the top of the separation tower (400) is connected with a combustible gas storage chamber (410), and the combustible gas storage chamber (410) is connected with the burner (110);
a tar and wood vinegar separator (500) connected to the cyclone separator (300) and the bottom of the separation tower (400); the tar and pyroligneous liquor separator (500) is connected to a pyroligneous liquor storage chamber (510) and the burner (110).
2. The biochar production system according to claim 1, wherein an air suction pump is provided between the cyclone (300) and the separation column (400).
3. The biochar production system according to claim 1 or 2, wherein a cooler (420) and a gas scrubber (430) are further provided between the separation tower (400) and the combustible gas storage chamber (410).
4. A biochar production system according to claim 3, wherein the top of the separation column (400) is connected to the cooler (420), the top of the cooler (420) is connected to the gas scrubber (430), and the bottoms of the cooler (420) and the gas scrubber (430) are connected to the combustible gas storage chamber (410).
5. The biochar production system according to claim 4, wherein an air suction pump is provided between the separation tower (400) and the cooler (420); an air suction pump is arranged between the cooler (420) and the gas scrubber (430).
6. A biochar production system according to claim 1 or 2, wherein the burner (110) is further connected with a fuel chamber (120) for providing external fuel.
7. The biochar production system according to claim 1 or 2, wherein the anaerobic retort (200) is a closed internal heating type anaerobic furnace.
8. The biochar production system according to claim 7, wherein the anaerobic retort (200) is one of a rotary kiln, a raking kiln, a stewing kiln or a kiln.
9. A method for preparing biochar, characterized in that the biochar is prepared by using the biochar preparation system according to any one of claims 1 to 8, comprising the steps of:
(1) Adding the straw into an anaerobic dry distillation device (200), and heating by a combustion chamber (100) to carry out dry distillation reaction to obtain biochar and gas fractions;
(2) Delivering the gas fraction to a cyclone separator (300) for primary separation to obtain a gas fraction and a liquid fraction;
(3) Delivering the gas fraction to a separation column (400) for secondary separation to obtain a combustible gas and liquid mixture; conveying the liquid mixture and the liquid part obtained in the step (2) to a tar and wood vinegar separator (500) for separation to obtain wood vinegar and tar; delivering the tar to a combustion chamber (100) for combustion heating;
(4) And (3) cooling and washing the combustible gas obtained in the step (3), and conveying the combustible gas to a combustion chamber (100) for combustion and heat supply.
10. The method of claim 9, wherein the combustible gas comprises methane, carbon monoxide, and hydrogen.
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| CN202311199161.3A CN117210233A (en) | 2023-09-15 | 2023-09-15 | Biochar preparation system and method for preparing biochar by using same |
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| CN202311199161.3A CN117210233A (en) | 2023-09-15 | 2023-09-15 | Biochar preparation system and method for preparing biochar by using same |
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2023
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