General wood substance grain processing technique and system

Abstract

The invention discloses a process of general-purpose wood particles, which employs remains of tending and cutting of forest and wood-curing waste as materials which are processed into wood chippings and crashed into wood particles. Crashed wood particles are screened, and wood particles with qualified size are passed to next process and wood particles with unqualified size are crashed again. Heat produced in forming process is used to vaporize contained water to soften the powder materials, and then the powder materials are compressed into particles under the effect of extrusion force. The formed particles which have high temperature and include a small amount of crushed aggregates must be cooled and screened. Screened crushed aggregates returns to the particle processing and forming process and the finished products of particles enters the final package process. Compared with prior art, the energetic consumption of specific yield of the invention can be remarkably reduced, and gross investment can be greatly decreased. The invention discloses a process for producing wood particles, which is on the premise that products quality is met, changes the order of processing technique, reduces gross investment of device, decreases energetic consumption of specific yield, and has low manufacture cost and simple process.

Description

Technical field: [0001] The invention discloses a general-purpose wood particle production process, and also provides a production system adapted thereto, which is suitable for the molding production of wood particles of different materials in the field of biomass energy, and belongs to the technical field of wood particle fuel molding processing. Background technique [0002] At present, due to the reduction of fossil energy, my country is paying more and more attention to the utilization of renewable biomass energy. Some domestic research institutes have conducted related research and achieved some results, such as: "An Environmentally Friendly Wood Pellet Fuel and Its production method" (Patent No.: ZL200410046987.7) patented technology, its production process sequence is: [0003] Slicing→drying→crushing→granulating and forming→cooling, sieving→packaging [0004] Since forestry waste usually has high moisture content, a general hammer mill is used to crush the raw materi...

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Problems solved by technology

[0004] Since forestry waste usually has high moisture content, a general hammer mill is used to crush the raw materials. The crushing process must be done after the drying process, otherwise the output of the crusher is not enough for the granulation process, and the crushing process and the granulation process are closely connected. An expensive pulse dust removal system can meet the dust removal requirements of the granulation workshop, so the energy consumption of the crushing process is high; if the particle size of the slice is less than 10mm, the output will decrease and the energy consumption will increase sharply. To solve this problem, the slice size needs to be increased. In this way, the drying process cannot use the airflow drying system with low investment and low energy consumption, but must use an expensive drum drying system, and the investment and energy consumption of the drying process will increase a lot, resulting in still higher production costs, causing its popularization and application to be limited. influences

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