Wood high-heat treatment device and technological process thereof

Abstract

The invention relates to a device and a technical method for the high-temperature thermal treatment of timber. The device adopts a structure that: the air outlet of a reverse combustion-type combustion-heat exchange integral hot blast stove is communicated with the air inlet of a gas ejector pipe, the air outlet of the gas ejector pipe is communicated with the air inlet pipe of a return pipe through a log pile in a logging truck, the air outlet pipe of the return pipe is connected with one end of a heat supply fan through a humidifying device, the other end of the heat supply fan is connected with the air inlet of the reverse combustion-type combustion-heat exchange integral hot blast stove, and the smoke outlet of the reverse combustion-type combustion-heat exchange integral hot blast stove is connected with an induced draft fan; and a machine body of the high temperature thermal treatment device is provided with a machine body heat-preservation layer, and the top of the reverse combustion-type combustion-heat exchange integral hot blast stove is provided with a charging hole. The technical method comprises the steps of piling, ignition, process control, conditioning treatment, temperature reduction and discharge and the like. The device and the method have that advantages that: residues of timber processing are used as fuel, the heat exchange of a thermal treatment cyclic medium is carried out through the reverse combustion-type combustion-heat exchange integral hot blast stove at a time, the thermal efficiency is high, the combustion is complete and no pollution is produced.

Description

technical field [0001] The invention relates to high-temperature heat treatment equipment and a process method for wood, belonging to the technical field of wood processing. Background technique [0002] At present, the conventional wood high-temperature heat treatment process is to place the wood under the protection of water vapor at a heat treatment temperature of 180°C to 220°C. For such a high heat treatment temperature, using saturated water vapor under high pressure as a heat medium is not realistic. Therefore, industrial wood high-temperature heat treatment equipment usually uses heat transfer oil (oil temperature is usually greater than 240°C) as the heating medium. In this way, in terms of equipment investment, in addition to the investment in the heat treatment equipment itself, it is also necessary to increase the heat transfer oil heating. Investment in ancillary equipment such as systems, steam boilers or steam generators. In some cases, the total investment ...

AI Technical Summary

Problems solved by technology

For the vast majority of wood companies, the heat-conducting oil furnace usually uses wood processing residues as fuel, so that the heat generated by the combustion of wood processing residues is first transferred to the heat-conducting oil by the heat-conducting oil furnace, and then transferred by the heat-conducting oil For the heat treatment medium inside the heat treatment equipment, the energy utilization rate of the two heat exchanges is actually not high

Moreover, due to the high volatile content of wood fuel, when the combustion is incomplete, a large amount of volatile content will be discharged into the indoor and outdoor environment together with the flue gas, which will directly endanger human health and pollute the atmospheric environment. Heat conduction oil furnace itself also has serious environmental pollution problems

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