How is charcoal fired, and how is wood burned into charcoal?

Charcoal is a dark brown or black porous solid fuel left over from incomplete combustion of wood or wood-based raw materials or pyrolysis in the absence of air.

Charcoal is an impure amorphous carbon that retains the original structure of the wood and the residual tar in the pores. Charcoal was used for the smelting of bronzes of the Shang Dynasty and iron tools of the Spring and Autumn Period and the Warring States Period in China, and its hygroscopicity was used to observe climate change.

The manufacture of charcoal is generally made in small batches by cutting a certain amount of small shrubs, digging a pit in the ground, and putting the trees into the pit to burn (note: the carbon should not be oxidized); Do not, and then extinguish or bury it with water or soil, and be careful to seal it, otherwise the carbon will burn and play. Large quantities have to do special kilns, and there are also special tree species, generally most of them are oak trees (the name may be different), and experienced people are responsible for grasping the timing of the seal, in case of burning or insufficient burning, burning leads to a reduction in production and the time is relatively short, and insufficient burning leads to a lot of heads, that is, smoke.

Summary process: material preparation--- combustion--- sealing --- taking (finished product).

Charcoal is first burned in a kiln with a tree, burned to a certain extent and quickly extinguished in water, and then it becomes charcoal after a period of time.

There are two ways to make it:

1) Kiln firing method, build a kiln with clay, fill it with wood, burn it from the kiln door or fire gate, so that the wood is carbonized in the kiln, and the volatiles escape and the charcoal remains;

2) Dry distillation, that is, dry distillation of wood. According to the extinguishing method of the kiln, there are two kinds of black charcoal and white charcoal.

Brief introduction of charcoal kiln: there are many forms and structures of kilns, such as Zhejiang kiln, carp kiln, wooden scoop kiln, Hunan wood kiln and Sichuan wood kiln, fast iron kiln, machine kiln and so on. Usually, the method of extinguishing the flame in the kiln is called the kiln extinguishing method, and the obtained charcoal is called "black charcoal".

When the wood is carbonized in the kiln, it is taken out of the kiln while it is hot, and then the method of extinguishing the fire with wet sand is called the extinguishing method outside the kiln. During the flame-outing process, the charcoal is calcined in contact with the air, and the outside of the charcoal is oxidized, and the resulting white ash adheres to the charcoal, which is called "white charcoal". White charcoal is harder than black charcoal.

First of all, you need a simple kiln, and put some large pieces of wood at the bottom first

<> placed in such a way that air can enter from the bottom.

<> put some wood in the middle that has not burned through, and this is where the wood first burns.

The wood is placed radially from large to small, and the middle temperature is high to burn large wood.

It looks like it's full.

I stick in with a long pole through the ventilation hole and ignite the fire.

After ignition, the bottom gap of the kiln is filled with sand and the chimney <> is inserted

Burn ...... quietly

After the <> is almost burned, the hole for smoke is also plugged and the kiln is allowed to cool for 24 hours.

<> the appearance of opening after cooling.

<> sift out the right size of charcoal, pack it, and you're done.

Method steps for burning charcoal with wood: Step 1:

Location. Generally speaking, the address should be located relatively far away from the place where there are residents, and then dig a kiln. Dig out the dirt and leave only about two or three smoke holes.

Step 2: Cut down the tree. The key step in charcoal burning is, of course, the need for trees. Find a sturdy tree, cut it down, cut it to a length of less than a meter, and drag it to the kiln where it has been dug.

Step 3: Burn. First use low heat to dry the moisture on the tree, then increase the heat a little and start roasting.

Step 4: Seal. Seal the kiln and continue to bake, to ensure that there is no gap, generally speaking, about three days is fine, but if there are many trees, of course, it will take more time.

Step 5: Take the charcoal. The kiln has been sealed for a long time, so there will be a heavier smoke when taking it, so you should cover your mouth and nose tightly before taking out the charcoal.

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Ask a question, hello teacher. I use an iron bucket to burn charcoal, how to burn it?

Charcoal is generally made by people to build a kiln with clay, fill it with wood, and burn it from the kiln door or fire gate, so that the wood is carbonized in the kiln, and the volatiles escape and the charcoal remains. That is, the dark brown or black porous solid fuel left over from incomplete combustion of wood or wood raw materials or pyrolysis under the condition of isolated air.

Charcoal should be divided into two kinds, one is the log charcoal made directly from broken wood or logs, and the other is the machine-made charcoal made by using a charcoal machine.

1. The old-fashioned process is to burn charcoal, that is, the trees are cut into sections, ignited in the charcoal kiln, burned to a certain extent, the air of the charcoal kiln is closed, and the waste heat continues to heat the wood for dry distillation, the water and wood tar are boiled out, and the wood is carbonized into charcoal. This is similar to the past when families burned firewood and held charcoal.

2. Now there is a method of using wood chips and other waste processing mechanisms to make charcoal, pressing these wastes into shapes, indirectly heating them in the furnace for dry distillation, and carbonizing these raw materials into charcoal.

Method Step 2

1. To make traditional charcoal, you must first dig a charcoal kiln and fill the kiln with half-dried whole firewood.

2. Then seal the kiln, and then burn the small kiln into the kiln with a large fire from the fire hole dug when digging the kiln for a day or two. The principle is to heat the firewood in an oxygen-deficient environment.

3. With the banning of earthen kilns in recent years, there are few left, so charcoal burners will focus on the carbonization furnace. Airflow carbonization furnace and dry distillation carbonization furnace are two different equipment. The dry distillation carbonization furnace can be more effective in the flue gas and meet the requirements of environmental protection.

Hope mine can be helpful to you.

How to make charcoal:

One is the kiln firing method, that is, a kiln is built with clay, filled with wood, and then ignited and burned, so that the wood is carbonized in the kiln and volatiles escape. The other is dry distillation, that is, the wood is placed in a dry distillation kiln and heated and decomposed into charcoal under the condition of air isolation, which is wood dry distillation.

Charcoal is a dark brown or black porous solid fuel left over from incomplete combustion of wood or wood-based raw materials or pyrolysis in the absence of air.

In fact, no matter what production process is used, charcoal is the product of volatilizing the gases and liquids in the wood by heating. The rest of the material is the solid combustible part of the wood, so that it can only heat up and not smoke when burned.

1.Generally, the wood is placed in the kiln, and after ignition, it is first allowed to burn freely, and after a while, the kiln is sealed and let under the condition of lack of oxygen until it is extinguished;

2.Burn the wood and boil it thoroughly, quickly pour the red-hot wood with cold water, and all that is left is charcoal. Note; You have to burn the wood thoroughly.

1. First chop some thin wooden strips, and then put them in an iron pot. <>2. Put a large amount of firewood in a large iron bucket and burn it, and when the fire is very hot, put the pot into the iron bucket.

3. Put in the iron pot to cover the lid, the lid must leave a few holes for ventilation, you can see the crack in the pot shouting white smoke, as long as you take a piece of paper or sawdust on the smoke, it will be directly on fire.

4. After firing for more than an hour, open the pot and the wooden strips turned black.

5. The production of charcoal is completed.

Summary. Hello, dear, I am happy to answer for you, the wood for burning charcoal has green oka, birch, hemp oak, bitter oak, elm, maple (maple), fruit wood (apple, pear, lychee, jujube, etc.).

What wood can burn charcoal.

Hello, dear, I am happy to answer for you, the wood for burning charcoal has green oka, birch, hemp oak, bitter oak, elm, maple (maple), fruit wood (apple, pear, lychee, jujube, etc.).

The best raw material for burning charcoal is the wood of the genus C. glauca, Quercus spp., Quercus spp., Quercus spp., and Quercus spp., which burns charcoal from this kind of wood both hard and durable, and the masses call it "steel charcoal". It is followed by the wood of the genus Quercus and Chestnut of the family Shellaceae, as well as other hard broad-leaved materials such as oak, camellia, oak, red frieze, purple stem, eucalyptus, red nan, loquat, heather, rowan, mosquito mother tree, water silk pear, etc., and the quality of the charcoal fired is also good.

The main component of charcoal is carbon, the ash content is very low, the calorific value is about megajoules, in addition to hydrogen, oxygen, nitrogen and a small amount of other elements, the content of which has little to do with the tree species, mainly depends on the final temperature of carbonization. Charcoal is a hydrophobic substance, the ash content is within 6%, the pores account for more than 7% of the charcoal volume, the specific gravity is generally, the calorific value depends on the carbonization conditions, generally about 8000 kcal kg, the reducing capacity of charcoal is greater than that of coke. Charcoal has a large number of micropores and transition pores, so that it not only has a high specific surface area, but also has good adsorption properties after the tar substances in the pores are excluded.

Complete combustion with oxygen produces carbon dioxide, and incomplete combustion produces the toxic gas carbon monoxide.

Burning charcoal does not burn wood directly because burning charcoal is easier to ignite and is more convenient and safe to use. When charcoal is burned, there will be no large amount of flames and smoke, and there will be no strong smell, and the toxic substances produced by combustion are much less than that of wood, especially in aggravated roasting fires, which are not easy to be dangerous. When the wood is burning, it smokes mainly because it contains water, or it is not burned sufficiently, and the reason why charcoal does not smoke is because the water in it has been fully removed, which can better react with oxygen and emit heat energy.

Advantages of charcoal.

If you use wood as fuel, there will be a lot of flames, smoke will pollute the environment, and it is not good for people's health, inhaling too much carbon dioxide will cause hypoxia, and serious accidents will occur, and charcoal itself has been charred, oxidized, and it will not be such a situation if burned.

There are a large number of pores in charcoal, which adsorbs a large amount of gas, and is easier to burn, the calorific value of charcoal is high, and the energy produced by direct combustion of wood is not more than that of charcoal after carbonization, and charcoal has removed impurities compared to wood, water, nitrogen, oxygen, sulfur, etc., and the calorific value of combustion is higher than that of wood.

There are two kinds of Huihu in the preparation method:

1) Kiln firing method, build a kiln with clay, fill it with wood, burn it from the kiln door or fire gate, so that the wood is carbonized in the kiln, and the volatiles escape and the charcoal remains;

2) Dry distillation, that is, dry distillation of wood. According to the extinguishing method of the kiln, there are two kinds of black charcoal and white charcoal.

Usually, the method of extinguishing the flame in the kiln is called the kiln extinguishing method, and the obtained charcoal is called "black charcoal". When the wood is carbonized in the kiln, it is taken out of the kiln while it is hot, and then the method of extinguishing the fire with wet sand is called the method of extinguishing the fire outside the kiln. During the flame-outing process, the charcoal is calcined in contact with the air, and the outside of the charcoal is oxidized, and the resulting white ash adheres to the charcoal, which is called "white charcoal".

White charcoal is harder than black charcoal.