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CN-121991732-A - Plant fuel charcoal prepared from mugwort residues and method thereof

CN121991732ACN 121991732 ACN121991732 ACN 121991732ACN-121991732-A

Abstract

The invention discloses a plant fuel charcoal prepared from mugwort residue and a method thereof. The method comprises the steps of taking residues after deep processing of mugwort as a main raw material, drying and crushing, plasticizing, bonding and forming lignin of the mugwort at a temperature of 150-250 ℃ and a high temperature and high pressure of 10-30 MPa under the condition that no chemical adhesive is added, and carbonizing the mugwort at a low temperature in an oxygen-limited environment of 300-500 ℃. The density of the obtained fuel carbon is 0.8-1.2 g/cm < 3 >, the compressive strength is 5-15 MPa, the combustion heat value is 4500-5800 kcal/kg, the ash content is 3-8%, the volatile matter is 15-25%, and the fixed carbon is 70-80%. The invention realizes the high-value utilization of the mugwort waste, the obtained fuel carbon emits fresh mugwort fragrance when burning, has the auxiliary effects of mosquito repelling and air purifying, has less burning smoke and stable heat value, and is suitable for various scenes such as household barbecue, furnace-surrounding tea boiling, outdoor camping, atmosphere creation and the like. The invention has simple process, low cost, easy industrialization and good economic and social benefits.

Inventors

  • YU FENGJIE

Assignees

  • 光明中医药(河南)有限公司

Dates

Publication Date
20260508
Application Date
20260320

Claims (10)

  1. 1. A plant fuel charcoal prepared from moxa residue is characterized by being prepared from the plant residue after moxa deep processing as a main raw material by drying, crushing, plasticizing and bonding the lignin of the plant residue by high temperature and high pressure without adding any chemical adhesive, and carbonizing the plant residue in an oxygen-limited environment at low temperature.
  2. 2. The plant fuel char prepared from mugwort residue according to claim 1, wherein the mugwort residue comprises one or more of mugwort extraction essential oil, mugwort extraction flavone, mugwort processing or stem and leaf residue remaining after mugwort extraction of other active ingredients.
  3. 3. The plant fuel charcoal prepared from mugwort residue according to claim 1, wherein the high temperature and high pressure molding temperature is 150 ℃ to 250 ℃, the pressure is 10MPa to 30MPa, the pressure maintaining time is 5 to 20 minutes, the low temperature carbonization is performed in an oxygen-limited environment protected by nitrogen or inert gas, the carbonization temperature is 300 ℃ to 500 ℃, the heating rate is 5 to 10 ℃ per minute, the heat preservation time is 1 to 3 hours, and the density of the plant fuel charcoal is The compressive strength is 5-15 MPa, and the combustion heat value is 4500-5800 kcal/kg.
  4. 4. The plant fuel char prepared from mugwort residue according to claim 1, wherein the shape of the plant fuel char is any of a stick shape, a sphere shape, a cake shape, a block shape, or a tower shape.
  5. 5. The plant fuel charcoal prepared from mugwort residue according to claim 1, wherein mugwort hydrolat or natural plant essential oil is loaded on the surface or inside of the plant fuel charcoal, the loading amount is 0.1% -0.5% of the weight of the fuel charcoal, fruit wood scraps are mixed in the mugwort residue, and the weight ratio of the mugwort residue to the fruit wood scraps is 9:1-7:3.
  6. 6. The plant fuel char prepared from mugwort residue according to claim 1, wherein the ash content of the plant fuel char is 3% -8%, the volatile content is 15% -25%, and the fixed carbon content is 70% -80%.
  7. 7. A method for preparing the plant fuel char prepared from the mugwort residue as claimed in any of claims 1-6, comprising the steps of: The step (1) of pretreatment, which is to dry the residues after the deep processing of the mugwort to a water content lower than 15%, and crush the residues to 20-60 meshes to obtain mugwort residue powder; Step (2) of adhesive-free molding, namely placing the mugwort residue powder obtained in the step (1) into a molding die, performing compression molding at 150-250 ℃ and 10-30 MPa, and maintaining the pressure for 5-20 minutes to obtain a molded blank; Carbonizing, namely placing the molded blank obtained in the step (2) into a carbonizing furnace, heating to 300-500 ℃ at 5-10 ℃ per minute under the protection of nitrogen or inert gas, preserving heat for 1-3 hours, and naturally cooling to room temperature to obtain a mugwort fuel carbon matrix; and (4) optionally carrying out aroma enhancement treatment, namely uniformly spraying mugwort hydrolat or natural plant essential oil on the surface of the mugwort fuel carbon matrix obtained in the step (3), wherein the spraying amount is 0.1% -0.5% of the weight of the fuel carbon, and drying to obtain the aroma enhancement mugwort fuel carbon.
  8. 8. The method for preparing plant fuel char from mugwort residue as claimed in claim 7, wherein in step (1), the mugwort residue is further subjected to washing and impurity removal treatment before drying to remove sediment and metal impurities.
  9. 9. The method for preparing plant fuel charcoal from mugwort residue according to claim 7, wherein in the step (2), the temperature of the forming die is controlled to be 180-220 ℃, the pressure is controlled to be 15-25 mpa, and the dwell time is 8-15 minutes.
  10. 10. The method for preparing plant fuel charcoal from mugwort residue according to claim 7, wherein in the step (3), a sectional heating process is adopted in the carbonization process, wherein the temperature is firstly raised to 200-250 ℃ at 5-8 ℃ per minute, the temperature is kept for 30-60 minutes, and then the temperature is raised to 300-500 ℃ at 3-5 ℃ per minute, and the temperature is kept for 1-3 hours.

Description

Plant fuel charcoal prepared from mugwort residues and method thereof Technical Field The invention relates to the field of comprehensive utilization of biomass resources, in particular to plant fuel charcoal prepared from mugwort residues and a method thereof. Background The moxa (ARTEMISIAARGYI) is a traditional Chinese medicinal material and is widely applied to the processing and production of moxibustion, moxa sticks, moxa essential oil, moxa extract and other products. According to statistics, the planting area of Ai Caochong in China exceeds 100 mu, the annual output value of related industries of mugwort is approximately 300 hundred million yuan, and the annual growth rate is increased by 30% -50%. In the process of deep processing of the wormwood, a large amount of wormwood residues (mainly comprising stems, leaves and the like) are generated after effective components such as essential oil, flavone, wormwood and the like are extracted, and the residues account for about 60% -80% of the total amount of the raw materials. At present, most of the residues are directly abandoned, buried or simply burnt, so that not only is serious resource waste caused, but also the problem of environmental pollution is possibly caused. On the other hand, with the improvement of the living standard of people, leisure activities such as outdoor barbecue, tea cooking in a surrounding furnace, camping and the like are increasingly popularized, and the demand for fuel carbon is increased year by year. The barbecue charcoal and heating charcoal in the market at present are mostly made of wood and coal as raw materials or chemical adhesives (such as sodium carboxymethyl cellulose, starch, bentonite and the like) are added. The traditional fuel charcoal has the following problems that (1) wood is used as a raw material to cause forest resource consumption, (2) coal is used as a raw material to burn to generate harmful gases such as sulfur dioxide, nitrogen oxides and the like, (3) peculiar smell and harmful smoke can be generated when the fuel charcoal added with a chemical adhesive is burnt, and (4) the common fuel charcoal has single function, only provides a heat source and has no added value. In recent years, researchers have attempted to produce fuel char from biomass waste. For example, CN104498126a discloses a machine-made charcoal and its preparation method, which uses Chinese herbal medicine residue (containing mugwort) and biomass waste as raw materials, but needs to add 6-10 parts of adhesive to shape. Another patent CN104741202a discloses a biomass carbonization raw material forming unit, but still needs to mix materials by a mixer, and the problem of binder-free forming is not solved. The university of Zhengzhou research team discloses a method for preparing carbon material under low temperature air atmosphere by using mugwort leaf as raw material and application (CN 113415802A), but the method is used for preparing adsorption material, and needs to addEtc. and are useful in wastewater treatment rather than in the fuel field. Also, patent discloses a natural biofuel in which mugwort is added, but 10-30 parts of fire coal is added at the same time, and pollution gas generated by fire coal cannot be avoided. Therefore, how to utilize mugwort residue as a resource and at high value is a technical problem to be solved in the field, and a clean, safe and special added value plant fuel carbon without chemical adhesive is developed. Disclosure of Invention The invention aims to provide a plant fuel charcoal prepared from mugwort residues and a method thereof, which are used for solving the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: a plant fuel charcoal prepared from folium Artemisiae Argyi residue is prepared from folium Artemisiae Argyi by deep processing plant residue as main raw material, drying, pulverizing, plasticizing and bonding to form lignin at high temperature and high pressure without adding any chemical binder, and carbonizing at low temperature in oxygen-limited environment. Preferably, the mugwort residue comprises one or more of mugwort extraction essential oil, mugwort extraction flavone, mugwort processing or stem and leaf residue remained after extraction of other active ingredients of mugwort. Preferably, the high-temperature high-pressure forming temperature is 150-250 ℃, the pressure is 10-30 MPa, and the pressure maintaining time is 5-20 minutes. Preferably, the low-temperature carbonization is performed in an oxygen-limited environment protected by nitrogen or inert gas, the carbonization temperature is 300-500 ℃, the heating rate is 5-10 ℃ per minute, and the heat preservation time is 1-3 hours. Preferably, the density of the plant fuel charcoal is 0.8-1.2 g/cm < 3 >, the compressive strength is 5-15 MPa, and the combustion heat value is 4500-5800 kcal/kg. Preferably, the plant fuel charcoal ha