A Highly Durable Smokeless Barbecue Charcoal and Its Preparation Method

Abstract

A high-durability smokeless barbecue charcoal and its preparation method are disclosed. The raw materials for preparing the high-durability smokeless barbecue charcoal include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant adhesives. The weight of the aluminosilicate ceramic fiber is 1% to 12% of the weight of the wood, and the weight of the steel wool is 4% to 17% of the weight of the wood. The high-durability smokeless barbecue charcoal provided by this invention undergoes anhydrous ethanol degreasing treatment after charcoal preparation, which can improve combustion efficiency, reduce the smoke generated during combustion, and prevent pulverization after combustion, thereby further reducing dust generation. This results in a barbecue charcoal that is essentially smokeless and produces no dust, meeting user needs.

Description

Technical Field

[0001] This invention relates to the field of solid fuel technology, and in particular to a high-durability smokeless barbecue charcoal and its preparation method. Background Technology

[0002] Barbecues are widely popular due to their open and free dining environment and style. The main fuels used for barbecuing include charcoal, coal, coke, and bamboo charcoal. However, these existing heat sources all have drawbacks. For example, charcoal and bamboo charcoal have short burning times, coal produces a lot of smoke, and coke is difficult to ignite and use. Whether it's a short burning time, the production of dense smoke, or the difficulty in igniting, all of these factors contribute to serious environmental pollution and resource waste.

[0003] In today's society, air pollution is severe, and the government advocates environmental protection. Outdoor barbecues have been banned in many places. However, barbecued food is loved by the public, and electric grilling lacks flavor. Therefore, environmentally friendly barbecue charcoal has become an urgent need for people. Summary of the Invention

[0004] In view of this, the present invention provides a high-durability smokeless barbecue charcoal and a method for preparing the same, in order to meet the above requirements.

[0005] A highly durable smokeless barbecue charcoal is prepared from raw materials comprising the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant-based adhesives. In the modifier, the weight of graphite is 4%–14% of the weight of the wood, the content of bamboo charcoal is 6%–11% of the weight of the wood, and the barium sulfate is 2%–12% of the weight of the wood. In the adhesive, the weight of carboxymethyl cellulose is 12%–31% of the weight of the wood, the lignin is 22%–53% of the weight of the wood, and the plant-based adhesive is 3%–12% of the weight of the wood. The weight of aluminosilicate ceramic fiber is 1%–12% of the weight of the wood. The weight of steel wool is 4%–17% of the weight of the wood. The weight of the anhydrous ethanol is more than 200% of the weight of the barbecue charcoal.

[0006] Furthermore, the wood should be pulverized into wood powder.

[0007] Furthermore, the pulverized wood powder is added to the adhesive.

[0008] Furthermore, the modifier is added to the wood flour into which the adhesive is added to facilitate molding.

[0009] Furthermore, the aluminum silicate ceramic fibers and steel wool are added during the molding process.

[0010] Furthermore, the formed barbecue charcoal is immersed in anhydrous ethanol for degreasing treatment.

[0011] Furthermore, the surface of the high-durability smokeless barbecue charcoal is coated with a mixture of magnesium powder and adhesive to lower the ignition point, improve combustion efficiency, and thus reduce dust generated during combustion due to incomplete initial combustion. The magnesium powder accounts for 30% of the mixture of magnesium powder and adhesive, and 6-12g is applied per square meter during coating.

[0012] A method for preparing high-durability smokeless barbecue charcoal as described above includes the following steps:

[0013] STEP 101: Add an adhesive to the pulverized wood powder to facilitate the shaping and burning resistance of the barbecue charcoal. The adhesive includes carboxymethyl cellulose, lignin, and plant-based adhesives.

[0014] STEP102: Stir the mixture formed in STEP101 and add a modifier during the stirring of wood flour. The modifier is made of graphite, bamboo charcoal, and barium sulfate.

[0015] STEP 103: The mixture obtained in STEP 102 is fed into a wood flour extrusion molding machine for extrusion molding. During the molding process, aluminosilicate ceramic fibers and steel wool are added to reinforce the barbecue charcoal and improve its overall hardness. The weight of the aluminosilicate ceramic fibers is 1% to 12% of the weight of the wood. The weight of the steel wool is 4% to 17% of the weight of the wood.

[0016] STEP 104: Carbonize the extruded wood powder into barbecue charcoal and then cool it.

[0017] STEP105: Immerse the barbecue charcoal in anhydrous ethanol for degreasing treatment.

[0018] Furthermore, it also includes step STEP106: performing a secondary processing on the surface of the barbecue charcoal, namely coating it with a mixture of magnesium powder and adhesive to lower the ignition point of the barbecue charcoal, improve the combustion efficiency, and thus reduce the dust generated during the combustion process due to incomplete initial combustion. The magnesium powder accounts for 30% of the mixture of magnesium powder and adhesive, and 6 to 12 g is applied per square meter during coating.

[0019] Compared to existing technologies, the wood in the high-durability smokeless barbecue charcoal provided by this invention is pulverized into wood powder. However, since piles of wood powder cannot burn completely due to insufficient oxygen, it needs to be shaped into a tubular or porous form to obtain enough oxygen for combustion. Therefore, the wood powder is bound together using an adhesive comprising carboxymethyl cellulose, lignin, and plant-based adhesives. This adhesive, while binding the wood powder together, increases the tensile strength, compressive strength, and flexibility of the formed wood powder without increasing smoke production. The addition of graphite facilitates shaping, while the inclusion of aluminosilicate ceramic fibers and steel wool prevents the charcoal from crumbling after combustion, further reducing dust generation. Immersing the finished charcoal in anhydrous ethanol for degreasing minimizes the tar content, thus reducing smoke during combustion. This results in a barbecue charcoal that is virtually smokeless and produces no dust, meeting user needs. Detailed Implementation

[0020] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0021] The high-durability smokeless barbecue charcoal provided by this invention comprises the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The wood is pulverized to form wood flour. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant-based adhesives. In the modifier, the weight of graphite is 4%–14% of the weight of the wood, the content of bamboo charcoal is 6%–11% of the weight of the wood, and the barium sulfate is 2%–12% of the weight of the wood. In the adhesive, the weight of carboxymethyl cellulose is 12%–31% of the weight of the wood, the weight of lignin is 22%–53% of the weight of the wood, and the weight of the plant-based adhesive is 3%–12% of the weight of the wood. The weight of aluminosilicate ceramic fiber is 1%–12% of the weight of the wood, and the weight of steel wool is 4%–17% of the weight of the wood. The weight of the anhydrous ethanol is more than 200% of the weight of the barbecue charcoal.

[0022] The graphite, bamboo charcoal, barium sulfate, carboxymethyl cellulose, lignin, plant adhesives, aluminum silicate ceramic fibers, steel wool, and anhydrous ethanol mentioned are all existing technologies, and their material properties and preparation methods should be known to those skilled in the art, so they will not be described in detail here.

[0023] This invention provides a method for preparing highly durable smokeless barbecue charcoal, which includes the following steps:

[0024] STEP101: Add an adhesive to the pulverized wood powder to facilitate the shaping of the barbecue charcoal and improve its burning resistance. The adhesive includes carboxymethyl cellulose, plant fiber, and plant adhesive.

[0025] STEP102: Stir the mixture formed in STEP101 and add a modifier during the stirring of wood flour. The modifier includes graphite, bamboo charcoal, and barium sulfate.

[0026] STEP103: The mixture obtained in STEP102 is fed into a wood flour extrusion molding machine for extrusion molding. During the molding process, aluminum silicate ceramic fibers and steel wool are added to reinforce the barbecue charcoal and improve its overall hardness. The weight of the aluminum silicate ceramic fibers is 1% to 12% of the weight of the wood, and the weight of the steel wool is 4% to 17% of the weight of the wood.

[0027] STEP 104: Carbonize the extruded wood powder to make barbecue charcoal, and then cool it;

[0028] STEP105: Immerse the barbecue charcoal in anhydrous ethanol for degreasing treatment.

[0029] STEP106: Perform a secondary processing on the surface of the barbecue charcoal, namely, coat it with a mixture of magnesium powder and adhesive to lower the ignition point of the barbecue charcoal and improve the combustion efficiency, thereby reducing the dust generated during the combustion process due to incomplete initial combustion. The magnesium powder accounts for 30% of the mixture of magnesium powder and adhesive, and 6-12g is applied per square meter during coating.

[0030] In step STEP 101, the adhesive comprises carboxymethyl cellulose, lignin, and plant-based adhesives. Based on the wood before pulverization, the carboxymethyl cellulose comprises 12% to 31% of the wood's weight, the lignin comprises 22% to 53% of the wood's weight, and the plant-based adhesive comprises 3% to 12% of the wood's weight.

[0031] The carboxymethyl cellulose is used to increase the tensile strength, burst strength, and flexibility of the formed wood flour. The content of the carboxymethyl cellulose must be limited to between 12% and 31%. Less than 12% will reduce viscosity and the flexibility of cellulose, while more than 31% will cause the barbecue charcoal to clump together, clogging the extrusion outlet and making it impossible to form.

[0032] The lignin mentioned is mainly composed of lignin found in wood. Lignin is primarily extracted from pulp waste liquor, and is typically modified by polycondensation with phenolic resin or epoxy resin to improve bond strength and the performance of barbecue charcoal.

[0033] The plant-based adhesive can be a soybean protein adhesive. Soybean protein adhesive is made from soybean meal, a plant resource, using industrial water as a dispersion medium. It is mainly used in the wood processing industry for engineered wood products and is a new type of green and environmentally friendly adhesive. Since this is existing technology, it will not be elaborated further. The plant-based adhesive constitutes 3% to 12% of the weight of the wood. Less than 3% will reduce the strength of the charcoal, making it impossible to shape; more than 12% will cause excessive smoke, failing to meet the requirement of smokeless production.

[0034] In step STEP 102, the graphite primarily serves a lubricating function. Since the wood is pulverized and then compressed into a regular-shaped solid using an extruder before carbonization, graphite is added for lubrication to facilitate extrusion. The graphite content must be limited to 4%–14% of the wood's weight; less than 4% will not provide sufficient lubrication, while more than 14% will reduce the hardness of the charcoal. The bamboo charcoal's function is to absorb the odor of acetic acid, reducing the smell of the mixture. The bamboo charcoal content must be limited to 6%–11% of the wood's weight; less than 6% will not provide sufficient adsorption, while more than 11% will reduce the hardness of the prepared charcoal. The barium sulfate content must also be limited to 2%–12% of the wood's weight. Excessive barium sulfate (more than 12% of the wood's weight) will result in incomplete combustion of the charcoal, while less than 2% will not adequately inhibit smoke generation.

[0035] In step STEP 103, the aluminosilicate ceramic fiber, also called aluminosilicate fiber module, is produced by calcining and crushing coal gangue, then melting it into a liquid state at high temperature after being electrified, and finally spinning it out into ceramic fibers using a roller. Based on the characteristics of ceramic raw materials, the ceramic fiber module possesses properties such as fire resistance, heat insulation, sound absorption, and energy saving. This allows the barbecue charcoal to utilize the fire resistance, heat insulation, and energy-saving properties of the aluminosilicate ceramic fiber, mixing it into the charcoal to prevent it from crumbling after combustion, thus avoiding dust generation. It also extends the burning time, controls the burning rate, and prevents deflagration. Furthermore, the content of the aluminosilicate ceramic fiber must be limited to 1% to 12% of the weight of the wood. Less than 1% will not achieve the desired effect, while more than 12% will increase the brittleness of the barbecue charcoal and reduce its calorific value.

[0036] The steel wool, also known as steel fiber or steel wool, is composed of low-carbon steel filaments ranging from 0.125 to 0.189 mm. It exhibits good softness and superior wear resistance compared to fibers like cotton and linen. Furthermore, steel wool burns in oxygen to produce iron(III) oxide (Fe3O4), as shown in the equation: 3Fe + 2O2 = Fe3O4 (conditional ignition). This process provides good fire resistance. Adding steel wool during charcoal production increases the hardness and toughness of the charcoal. Its exothermic combustion properties also improve the initial combustion performance, further reducing soot production. The steel wool content must be limited to 4%–17% of the wood weight. Less than 4% will not form an effective and stable overall structure for the charcoal, nor will it achieve the desired combustion-supporting effect. More than 17% will negatively impact the sustained combustion characteristics of the charcoal, resulting in insufficient calorific value and excessive residual ash in the finished product.

[0037] In step STEP104, the carbonization process is existing technology and will not be described in detail here.

[0038] In step STEP 105, immersing the barbecue charcoal in anhydrous ethanol for degreasing is a prior art technique and will not be described in detail here. The weight of the anhydrous ethanol is more than 200% of the weight of the barbecue charcoal, ensuring that the tar in the barbecue charcoal can be decomposed and separated, thereby avoiding the generation of smoke.

[0039] In step STEP 106, because magnesium-aluminum powder has a low ignition point and a high calorific value, a mixture of magnesium powder and adhesive is coated onto the surface of the barbecue charcoal. The magnesium powder comprises 30% of the mixture, and 6-12g is applied per square meter. This accelerates the combustion of the charcoal, improving combustion efficiency and preventing incomplete combustion and smoke production in the initial stages. The adhesive used in step STEP 106 is the same as that used in step STEP 101, and its composition is identical.

[0040] The prepared barbecue charcoal can be packaged in waxed paper to prevent the magnesium powder inside from getting damp and to reduce transportation risks. Specific implementation examples:

[0042] Example 1: A high-durability smokeless barbecue charcoal, the raw materials of which include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive comprises carboxymethyl cellulose, lignin, and plant-based adhesives. The wood is wood powder pulverized by a pulverizer. In the modifier, the weight of graphite is 10% of the weight of the wood, the content of bamboo charcoal is 8% of the weight of the wood, and the barium sulfate is 7% of the weight of the wood. In the adhesive, the carboxymethyl cellulose is 18% of the weight of the wood, the lignin is 40% of the weight of the wood, and the plant-based adhesive is 8% of the weight of the wood. The weight of the aluminosilicate ceramic fiber is 6% of the weight of the wood. The weight of the steel wool is 8% of the weight of the wood. The coating amount of the mixture of magnesium powder and adhesive is 8 g / m². 2 The weight of the anhydrous ethanol is 320% of the weight of the barbecue charcoal.

[0043] Example 2: A high-durability smokeless barbecue charcoal, the raw materials of which include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier comprises graphite, bamboo charcoal, and barium sulfate. The adhesive comprises carboxymethyl cellulose, lignin, and plant-based adhesives. In the modifier, the weight of graphite is 12% of the weight of the wood, the content of bamboo charcoal is 7% of the weight of the wood, and the barium sulfate is 10% of the weight of the wood. In the adhesive, the carboxymethyl cellulose is 25% of the weight of the wood, the lignin is 35% of the weight of the wood, and the plant-based adhesive is 5% of the weight of the wood. The weight of the aluminosilicate ceramic fiber is 7% of the weight of the wood. The weight of the steel wool is 11% of the weight of the wood. The coating amount of the mixture of magnesium powder and adhesive is 9.3 g / m³. 2 The weight of the anhydrous ethanol is 280% of the weight of the wood.

[0044] Example 3: A high-durability smokeless barbecue charcoal, the raw materials of which include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant-based adhesives. In the modifier, the weight of graphite is 8% of the weight of the wood, the content of bamboo charcoal is 9% of the weight of the wood, and the barium sulfate is 255% of the weight of the wood. In the adhesive, the carboxymethyl cellulose is 24% of the weight of the wood, the lignin is 42% of the weight of the wood, and the plant-based adhesive is 8% of the weight of the wood. The weight of the aluminosilicate ceramic fiber is 9% of the weight of the wood. The weight of the steel wool is 14% of the weight of the wood. The coating amount of the mixture of magnesium powder and adhesive is 10.8 g / m³. 2 The weight of the anhydrous ethanol is 300% of the weight of the wood.

[0045] The main items tested are: total moisture (%), ash (%), and fixed carbon (%). The corresponding test methods are GB / T17664-1999(4.1), GB / T17664-1999(4.1), and GB / T17664-1999(4.2.4), respectively.

[0046]

[0047] In the table above, ash represents the spilled dust, and volatile matter represents the generated smoke. By collecting the volatile matter and ash, the ratio of ash to volatile matter in the total amount of charcoal can be measured.

[0048] The test data above shows that the ash content, i.e., dust, accounts for only 3.41% of the total mass of the barbecue charcoal, while the volatile matter, i.e., smoke, accounts for only 8.21% of the total mass of the barbecue charcoal. In other words, the proportions of dust and smoke are very small, basically achieving a smoke-free and dust-free effect.

[0049] Compared to existing technologies, the high-durability smokeless barbecue charcoal provided by this invention is produced by crushing wood into wood powder. However, since piles of wood powder cannot burn completely due to insufficient oxygen, it needs to be shaped into a tubular or porous form to obtain enough oxygen for combustion. Therefore, the acid-washed wood powder is bonded together using an adhesive comprising carboxymethyl cellulose, lignin, and plant-based adhesives. This adhesive, while binding the wood powder together, increases the tensile strength, compressive strength, and flexibility of the formed wood powder without increasing smoke production. The addition of graphite facilitates shaping, while the inclusion of aluminosilicate ceramic fibers and steel wool prevents the charcoal from crumbling after combustion, further reducing dust generation. Immersing the finished charcoal in anhydrous ethanol for degreasing further reduces the tar content, thus lowering the smoke produced during combustion. This results in a barbecue charcoal that is virtually smokeless and produces no dust, meeting user needs.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A highly durable smokeless barbecue charcoal, characterized in that: The raw materials for preparing the high-durability smokeless barbecue charcoal include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant-based adhesives. The wood is pulverized into wood powder. In the modifier, the weight of graphite is 4%–14% of the weight of the wood, the content of bamboo charcoal is 6%–11% of the weight of the wood, and the content of barium sulfate is 2%–12% of the weight of the wood. In the adhesive, the carboxymethyl cellulose is 12%–31% of the weight of the wood, and the lignin is… The wood comprises 22% to 53% of its weight, the plant adhesive comprises 3% to 12% of its weight, the aluminosilicate ceramic fiber comprises 1% to 12% of its weight, the steel wool comprises 4% to 17% of its weight, and the anhydrous ethanol comprises more than 200% of its weight. The surface of the high-durability smokeless charcoal, after degreasing treatment, is coated with a mixture of magnesium powder and adhesive to lower the ignition point of the charcoal, improve combustion efficiency, and reduce smoke generated during combustion due to incomplete initial combustion. The magnesium powder accounts for 30% of the mixture of magnesium powder and adhesive, and 6-12g is applied per square meter during coating.

2. The high-durability smokeless barbecue charcoal as described in claim 1, characterized in that: The adhesive is added to the wood flour.

3. The high-durability smokeless barbecue charcoal as described in claim 1, characterized in that: The plant-based adhesive is a soybean protein adhesive.

4. The high-durability smokeless barbecue charcoal as described in claim 1, characterized in that: The modifier is added to the wood flour containing the adhesive to facilitate molding.

5. The high-durability smokeless barbecue charcoal as described in claim 1, characterized in that: The aluminum silicate ceramic fiber and steel wool are added during the molding process.

6. The high-durability smokeless barbecue charcoal as described in claim 1, characterized in that: The high-durability smokeless barbecue charcoal is degreased using anhydrous ethanol after it is made.

7. A method for preparing high-durability smokeless barbecue charcoal as described in any one of claims 1 to 6, comprising the following steps: STEP101: Add adhesive to the crushed wood powder to facilitate the shaping and burning resistance of the barbecue charcoal. The adhesive includes carboxymethyl cellulose, lignin and plant adhesives. STEP102: Stir the mixture formed in STEP101 and add a modifier during the stirring of wood flour. The modifier includes graphite, bamboo charcoal, and barium sulfate. STEP 103: The mixture obtained in STEP 102 is fed into a wood flour extrusion molding machine for extrusion molding. During the molding process, aluminosilicate ceramic fibers and steel wool are added to reinforce the barbecue charcoal, thereby improving its overall hardness and durability. The weight of the aluminosilicate ceramic fibers is 1% to 12% of the weight of the wood, and the weight of the steel wool is 4% to 17% of the weight of the wood. STEP 104: Carbonize the extruded wood powder blocks to make barbecue charcoal, and then cool it; STEP105: Soak the cooled barbecue charcoal in anhydrous ethanol for degreasing treatment.

8. The preparation method according to claim 7, characterized in that: Step STEP 105 further includes step STEP 106: performing a secondary processing on the surface of the barbecue charcoal, namely coating it with a mixture of magnesium powder and adhesive to lower the ignition point of the barbecue charcoal, improve the combustion efficiency, and thus reduce the smoke generated during the combustion process due to incomplete initial combustion. The magnesium powder accounts for 30% of the mixture of magnesium powder and adhesive, and 6-12g is applied per square meter during coating.

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