Bamboo chips are one of the raw materials of bamboo products. They are narrow in width and long in length. In order to ensure the long-term durability of bamboo products made of bamboo chips, bamboo chips need to be dried after being cut into corresponding sizes to avoid The moisture inside remains, which makes the bamboo products last longer. But most of the bamboo strip dryers used for bamboo product processing now dry the bamboo strips in the transmission, and the bamboo strips will be deformed after being heated.

Precautions during the operation of steam drying kiln: The steam pressure supplied to the drying kiln is generally controlled within 0.3~0.5MPa, and it is best to stabilize at around 0.4MPa. If the steam pressure is unstable, it will affect the stability of the temperature and humidity of the medium in the drying room, making it difficult to control the temperature and humidity of the drying medium.

Drying process of wood heat pump dryer: 1. Install the wood according to the decoration standards, close the drying room, and turn on the control system. 2. Preheating: Turn on the heat pump and fan, set the upper temperature limit to 45 ℃. In order to save preheating and heating time, turn on the electric auxiliary system, and control the ambient temperature from 20 ℃ to 45 ℃ for heating and insulation time within 14 hours; At this stage, the energy efficiency ratio of the heat pump is around 3.5, operating at full load and the fan at full load.

Evaporation of moisture from the wood surface always takes place at a certain temperature, humidity and air velocity. Under normal circumstances, the humidity of the air in the drying kiln is always less than 100%, while the temperature of the air is much higher than normal temperature. Therefore, the equilibrium moisture content of the air is lower than that of the wood surface, and the moisture on the wood surface evaporates into the air. How quickly water evaporates from the wood surface depends on the temperature and humidity of the air. When the air temperature rises or the humidity decreases, the evaporation rate of water on the wood surface is accelerated; on the contrary, the lower the air temperature, the greater the humidity, and the slower the evaporation rate of surface water.

Wood drying refers to the process of using external energy to convert water in wood into steam and expel it. The drying of wood can be divided into two categories: natural drying and artificial drying.

Internal stress, also known as internal force, is caused by uneven drying shrinkage. For example, when the surface of wood has started to dry and shrink, and the interior of the wood is still moist, the surface may dry and shrink while the interior does not, resulting in internal stress. When a straight and dry wooden board is sawed into a thin plate, it should immediately experience a phenomenon of warping, which is a manifestation of internal stress in wood. If a sawn wooden board has a convex surface facing inward, it indicates external tension and internal pressure.

As a heat exchange device that can continuously output heat, boilers are used in almost all fields of production. They not only have high efficiency but also greatly reduce the labor cost of enterprises. So, what are the selection methods for steam boilers used for drying wood? What is the special type of dry boiler? Let's learn about Zhongzheng Boiler together.

By usage environment According to the usage environment, it is divided into outdoor grade carbonized wood and indoor grade carbonized wood.

The mature heat treatment processes abroad mainly include Thermo Wood from Finland, Plato Wood from the Netherlands, and Correction from France.

Chemical modification of wood: Chemical reactants react with hydroxyl groups in the wood cell wall polymer, leading to the formation of covalent bonds between the reactants and the wood matrix Wood thermal modification: Heating wood leads to a certain degree of degradation of its components, resulting in the desired improvement in wood properties Wood surface modification: Chemical, physical, or biological (enzyme) reagents are applied to the wood surface to achieve the desired performance improvement.