38results about How to "Fast carbonization" patented technology

The invention discloses a preparation method of an adsorbing material for oil-containing wastewater. The adsorbing material is prepared from polytrimethylene terephthalate, bisphenol A epoxy resin, vinylbenzyl trimethylammonium chloride, coconut shell, phenol, polyvinyl alcohol and the like. The preparation method comprises the following steps: preparing a porous carbon fiber from the coconut shell; carrying out modification treatment for multiple times to obtain a porous carbon fiber with high mechanical strength and high adsorptivity; combining the porous carbon fiber with the vinylbenzyl trimethylammonium chloride with excellent affinity to obtain an oil adsorbing elution material with good physical chemistry stability and excellent mechanical strength. With stability, the adsorbing material is suitable for being applied under various complex environmental conditions, has good environmental and economic benefits and is easy for large-scale production.

The invention discloses a method for preparing an agent for adsorbing and removing organic gas. The agent for adsorbing and removing the organic gas is prepared from tetraethyl orthosilicate, anhydrous ethanol, N,N-dimethylformamide, coconut shells, phenol, polyvinyl alcohol and other raw materials, and according to the method, porous carbon fiber which is obtained by performing multiple modification process treatment and has high mechanical strength and high adsorbability is prepared from the coconut shells; on the basis of the porous carbon fiber, loading of silica and activation of nitrogen-containing gas are achieved through the addition of the tetraethyl orthosilicate, and a large amount of a nitrogen element is introduced on the carbon fiber, so that a strong catalytic effect on sulfur-containing and nitrogen-containing compounds in the air is achieved, and stable and efficient adsorbability of benzene, toluene and other volatile toxic gas is achieved; the skeleton of the modified carbon fiber has strong adaptability to acid, alkali, high temperature and other environments, so that a long-term stable effect of adsorption and purification is achieved; and in addition, the usage mode is flexible, and good applicability to factories, homes and public places is achieved.

The invention relates to a wood microwave vacuum drying and charring device and a drying and charring method thereof. The device comprises one charring tank (box) with a tank door (3), a tank door opener (2) and a charring chamber (1), a vacuum system, and one or more microwave sources (6) generating the microwave, a heat-conducting oil furnace system and a material preparation and feed system. The drying and charring method comprises the following steps: A. rising the temperature inside the tank to 30-50 DEG C, and then to 80-130 DEG C at the rate of 2-8 DEG C / h; B. preserving the temperature for 2-100 hours; C. vacuumizing the tank for 4-100 hours; D. starting a hot recycle pump to control the oil furnace temperature, the oil flow rate and the pressure inside the tank for 4-100 hours: E. turning off the microwave source and a heat source, opening an intake and exhaust valve (39) to discharge the pressure inside the tank to 0 and lower the temperature to 70-130 DEG C, and then closing the intake and exhaust valve (39); and F. starting a vacuum pump (22) to lower the temperature inside of the tank by air circulation and removing the wood from the tank when the temperature decreases to 30-70 DEG C. The device and the method help char the wood evenly, shorten the production cycle by 60% compared with the conventional method, and lower the energy consumption by 70%, thus greatly reducing the production cost.

The invention discloses a digestion processing method for detecting the content of metal elements in food. The method comprises: measuring or weighing samples of objects to be digested into a digestion container, and putting the digestion container into high-temperature superheated steam digestion equipment high-temperature steam digestion zone; in the high-temperature superheated steam digestion equipment, high-temperature superheated steam is used to digest the samples in the digestion vessel, wherein the digestion process includes: exhaust step, dehydration step, high-temperature digestion steps and sample cooling steps. The digestion treatment method provided by the present invention has the advantages of a large amount of processed samples and a fast carbonization speed of organic matter, and in an oxygen-free, normal-pressure environment, the metal elements of the tested sample will not be oxidized, and no carbonization will occur after carbonization. Large-grained carbon does not produce carbon particles to wrap metal compounds, and the amount of soluble acid used in the whole process is extremely low, which will not cause the risk of experimental accidents caused by strong acids, and will not cause environmental pollution risks.