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4 results about "Sawdust" patented technology

Sawdust (or wood shavings) is a by-product or waste product of woodworking operations such as sawing, milling, planing, routing, drilling and sanding. It is composed of fine particles of wood. These operations can be performed by woodworking machinery, portable power tools or by use of hand tools. Wood dust is also the byproduct of certain animals, birds and insects which live in wood, such as the woodpecker and carpenter ant. In some manufacturing industries it can be a significant fire hazard and source of occupational dust exposure.

Mushroom cultivating material and manufacturing method thereof

The invention discloses a mushroom cultivating material which is characterized in that bamboo sawdust, bamboo shells and biogas residues are used as raw materials, and the water content of the cultivating material is 62-65%. The invention also provides a manufacturing method of the cultivating material. Compared with the prior art, the mushroom cultivating material has the advantages that firstly, the cultivating material is reasonable in proportion, and a fungous material keeps certain air permeability, so that the growth speed of mycelia is increased, and the sackful time is shortened; secondly, bamboo sawdust particles are hard in texture and resistant to decomposition, and the biogas residues contains comprehensive nutrients including nitrogen, phosphorus and potassium, so that the growth of mushroom is promoted, the yield of a product is increased, and the quality of the product is improved; and thirdly, wood is replaced with bamboos and bran is replaced with the biogas residues, so that the source of a cultivating raw material is widened, and the production cost is reduced. The mushroom cultivating material has the social benefits that wood dust is replaced with the bamboo sawdust and the bamboo shells, so that part of contradiction between a fungus and forestry can be alleviated, waste materials can be changed into things of value, and energy conservation and emission reduction can be favorably realized.
Owner:邬金飞

Water-proof roof glue

InactiveCN101225288AImprove waterproof and thermal insulation performanceGood weather resistanceBituminous material adhesivesHydrocarbon polymer adhesivesAdhesivePolystyrene
The invention relates to a building waterproof material, in particular to a waterproof roof adhesive, which aims to solve the problems in prior roof waterproof material of poor weatherability, easy bubbling and peeling, and poor permeability and air permeability, comprising asphalt, coal tar, waste polystyrene foam, lime and sawdust. Firstly, the waste polystyrene foam is ground to particles; secondly, the coal tar is added into a vessel and heated to 650 to 700 degrees; and the asphalt is added into the vessel, and then the former mixture is agitated homogeneously and keep on warming up to 750 degrees, after the asphalt is dissolved, the mixture is cooled to 400 to 500 degrees; at last, waste polystyrene foam, lime and sawdust are added into mixture successively, the mixture is agitated homogeneously and cooled to a paste shape, and then the finished product is obtained. The building waterproof material has the advantages that: the building waterproof material integrates the advantages of waterproof, heat preservation and heat insulation and has admirable waterproof and heat preservation effect, good weatherability, no fluid and cracks, high adhesive strength; meanwhile, the material meet the national specified standard; more importantly, the aim of waste reuse, pollution treatment, environment protection and cost saving are realized by using the waste polystyrene foam.
Owner:亢吉田

Activated carbon preparation process

ActiveCN111874904AReduce processing efficiencyReduce air pressureCarbon compoundsDrying gas arrangementsActivated carbonHoneycomb
The invention belongs to the technical field of activated carbon preparation, and particularly relates to an activated carbon preparation process which comprises the following steps: step 1, drying and grinding: carbonizing and grinding sawdust after drying to obtain dried carbon powder; step 2, processing and forming: processing the carbon powder into a cylindrical carbon block by using a mold, and forming a plurality of honeycomb-shaped through holes; step 3, cleaning of the carbon block: washing the formed carbon block with water to remove impurities on the surface of the carbon block; step4, drying of the carbon block: drying the cleaned carbon block to remove moisture in honeycomb-shaped through holes of the carbon block, wherein the drying process of the cleaned carbon block in thestep 4 is completed by adopting an activated carbon preparation machine in a matching manner. The invention solves the problems that at present, when the interiors of cylindrical activated carbon honeycomb holes are dried, part of moisture on the inner walls of the honeycomb holes permeates into the surface layers of activated carbon, sufficient drying is difficult, and moisture residues are likely to be caused, and conveying and drying cannot be conducted synchronously, and the machining efficiency is low.
Owner:JIANGSU QIANHUIHE ENVIRONMENTAL REGENERATION CO LTD
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