63results about How to "Uniform carbonization" patented technology

The invention discloses an efficient selectable pyrolysis system and a using method thereof, wherein the efficient selectable pyrolysis system comprises a furnace body, a dry distillation kettle, gas nozzles and a cooling device, wherein a furnace chamber in the furnace body is internally provided with the horizontally-arranged dry distillation kettle, wherein the dry distillation kettle comprises an upper side part, a lower side part, a kettle top and a kettle bottom; the part on the upper side part close to the kettle top is communicated with an exhaust pipe; the other end of the exhaust pipe is connected with a diffusion valve; the part on the furnace part close to the exhaust pipe is provided with a temperature meter communicated with the furnace chamber; the lower part of the lower side part is communicated with gas outlets of four staggered gas nozzles; the gas outlets of the gas nozzles are connected with a control valve; the cooling device comprises a nitrogen intake pipe and a nitrogen exhaust pipe, wherein the nitrogen intake pipe is communicated with the kettle top; the nitrogen exhaust pipe is communicated with the upper side part; and when the efficient selectable pyrolysis system is used, if carbon production is emphasized the heating is finished to pyrolysis carbonization stage, and if biomass gas production is emphasized, the heating is finished to the forging stage. The design not only has good adjustability, high cost performance and high heating efficiency, but also the finished product carbon has good quality and high production efficiency.

The purpose of the invention is to provide a preparation method of a black pottery artware. First, blank material yellow clay is selected, and processes of crushing, deposition, mud extruding, and fermentation are carried out on the yellow clay to obtain black pottery mud. Then, moulding processing is carried out on the black pottery raw material, and after the processes of shade drying, shape modification, polishing, painting, engraving, polishing once again and shade drying are carried out on an unburned earthenware body, surface treatment is carried out on the unburned earthenware body. Finally, the unburned earthenware body is put into a kiln special for black pottery sintering to carry out sintering, and the sintering process comprises preheating, heating, cooling, smoke drawing, kiln closing, and kiln moistening. In sintering, both the surface and the interior of the unburned earthenware body of the black pottery artware sintered in the invention can be carbonized uniformly, and present a black color. Fine channels favor the penetration of soot, so that the black pottery artware is pitch black and bright from inside to outside, has a natural, smooth, and non-fading color, and has no peculiar smell of asphalt or impurities. In addition, the preparation method of the invention has short sintering time, and saves both energy and labor.

The invention discloses a carbon powder preparation method which specifically comprises the following steps: drying raw materials, crushing, carbonizing, crushing and packaging, wherein the step of carbonizing adopts a sectional carbonizing mode which comprises three carbonization sections, the temperature of the first section is 200-250 DEG C, the temperature of the second section is 250-300 DEG C, the temperature of the third section is 300-400 DEG C, and the carbonization time is 10-30 minutes. According to the method, the carbonization temperature and the carbonization time of each period are set according to different raw materials, the carbonization uniformity is improved, and the purposes of high carbon powder rate and high quality are achieved at appropriate temperature and time for different raw materials.

The invention discloses a method for large-scale on-site production of biochar from crop straws. The method comprises the following steps of building a soil pyrolysis tank in an open space, stacking air-dried crop straws on the soil pyrolysis tank according to a certain dimension, burning the crop straws under the condition of enough oxygen in a short time, and fast covering the burning area by soil so that the fire is extinguished completely, wherein by heat produced by combustion of a small part of biomass, under the conditions of low oxygen content and thermal resistance caused by soil covering, the rest of the biomass can be fast pyrolyzed into high-quality biochar. The biochar obtained by the method has the advantages of high yield, good charing uniformity, high charing level and low smoke production amount.

The invention relates to the technical field of activated carbon preparation, and particularly discloses a preparation process of phenolic resin-based spherical activated carbon, which comprises the following steps: S1, adding phenol, formaldehyde, a catalyst, a curing agent and a solvent into a reaction kettle, and emulsifying to obtain phenolic resin microspheres; S2, placing the phenolic resinmicrospheres in a rotary furnace, introducing inert gas for protection, increasing the temperature to 150-250 DEG C at the speed of 1-10 DEG C/min, conducting heat preservation for 0-2 h, and completing curing; continuously heating to 600-900 DEG C at the speed of 3-10 DEG C/min under the protection of inert gas, and keeping the temperature for 0-1 hour to finish carbonization; s3, stopping introducing the inert gas, introducing water vapor with the temperature of 200-330 DEG C for activating treatment, and cooling to obtain activated carbon microspheres with mixed particle sizes; and S4, sieving the activated carbon microspheres with the mixed particle size by adopting sieves with different mesh numbers to obtain the phenolic resin-based spherical activated carbon with uniform particle size distribution. The activated carbon microspheres prepared by the preparation method disclosed by the invention are uniform in particle size, low in impurity content and high in adsorbability.

The invention relates to a device and method for accurately expanding AlN seed crystals, and belongs to the field of crystal growth. The operation is simple, the efficiency is high, and the AlN crystal with the corresponding size can be manufactured as required. The device for accurately expanding the AlN seed crystal comprises a graphite heater, a crucible and a growth combination, the crucible is positioned in the graphite heater; the growth combination is positioned in the crucible; the silicon carbide seed crystal gasket is detachably connected with the crucible gasket and the crucible body; AIN seed crystals with corresponding sizes can be obtained by replacing silicon carbide seed crystal gaskets with different sizes; the device and the method are simple to operate, the problem of difficulty in expanding in the growth process of the aluminum nitride crystal is fundamentally solved, and compared with the prior art, the device and the method for accurately expanding of the AlN seedcrystal accelerate the growth and expanding speed of the aluminum nitride crystal, save the growth and expanding cost and time of the aluminum nitride crystal and accelerate the development process of the growth industry of the aluminum nitride crystal.

The invention discloses a graphene quantum dot material with high ultraviolet absorption characteristics and lipophilicity and a preparation method of the graphene quantum dot material. The preparation method prepares the graphene quantum dot material with the high ultraviolet absorption characteristics and the lipophilic characteristics by using an ester of a polycarboxylic acid molecule as a carbon source through heat carbonization; the ester of the polycarboxylic acid molecule used in the method is in a liquid state under normal temperature or heating conditions and has a high boiling point, by using the feature, uniform carbonization of the carbon source can be realized through a simple heating manner without using any solvent, no special requirements for a heating atmosphere and carbonization pressure are needed in the solventless carbonization process, the carbonization efficiency is high, the environmental friendliness is realized, possible side reactions between the solvent andthe carbon source are prevented, the product separation and purification process is greatly simplified, and in the subsequent reaction process, a crude product can be purified only by dispersing andprecipitating treatment; and the prepared material has good lipophilicity and high ultraviolet absorption characteristics.

The invention provides an automatic wooden product carbonizing machine which comprises a rack. A driving chain wheel and a driven chain wheel are symmetrically installed on the upper surface of the rack, a chain is installed between the driving chain wheel and the driven chain wheel, a plurality of supporting rods are evenly installed on the upper surface of the chain, and cylinders are rotationally connected to the upper ends of the supporting rods correspondingly. A vertical rod is fixedly connected to the upper end of each cylinder. Trays used for lifting wooden products are fixedly connected to the upper ends of the vertical rods correspondingly. Four clamping jaws used for limiting the position of the corresponding wooden product are evenly fixed to the edge of the upper surface of each tray. A carrying plate arranged in the length direction of the rack is fixed in the rack. A driving gear and a driven gear are symmetrically installed on the upper surface of the carrying plate. A rubber belt ring attached to the outer surfaces of the cylinders is installed between the driving gear and the driven gear. Compared with the prior art, the automatic wooden product cabonizing machine has the following beneficial effects that the purpose of mechanical carbonization is realized, the working efficiency is improved, and the labor intensity is relieved.

The invention discloses a wood carbonizing process. The wood carbonizing process comprises the steps of: (1) cutting; (2) carbonizing box building; (3) electrification; (4) wood wrapping; (5) wood fixation; (6) carbonizing; and (7) ventilation. The process not only can prevent excessive temperature in a carbonizing box from causing fire, but also can greatly improve the wood carbonizing efficiency, and improves the wood heating uniformity.

The invention relates to an internal heating type reduction activated carbon production converter which comprises a combustion room, a first retaining ring, an activation chamber, heat-insulating/energy-storing refractory bricks, a second retaining ring, a carbonization chamber, a multi-inclination-angle raising plate, a push type multi-inclination-angle raising plate, a drying and plasticization chamber and a feeding spiral conveyer, wherein the drying and plasticization chamber, the carbonization chamber, the activation chamber and the combustion room are sequentially communicated and connected; the inner diameters of the drying and plasticization chamber, the carbonization chamber and the activation chamber are sequentially reduced; the feeding spiral conveyer is arranged at the inlet of the drying and plasticization chamber; the push type multi-inclination-angle raising plate is arranged in the drying and plasticization chamber; the multi-inclination-angle raising plate is arranged in the carbonization chamber; the inner walls of the carbonization chamber and the activation chamber are respectively provided with a layer of heat-insulating/energy-storing refractory bricks; and the retaining rings are respectively arranged at discharge ports of the carbonization chamber and the activation chamber. The internal heating type reduction activated carbon production converter can prevent the material from falling at the tail part of the converter, realizes uniform carbonization, achieves favorable activation effect, can maximize the activated carbon yield and fully utilize heat in the converter, and is stable in product quality, energy-saving and environment-friendly.

The invention discloses a carbonization furnace for secondary utilization of crude coal flue gas. The carbonization furnace comprises a tubular carbonization cavity and a combustion furnace, the combustion furnace and a flue gas collecting bin are arranged at the two ends of the carbonization cavity respectively, a lattice wall is arranged in the combustion furnace, the combustion furnace communicates with a heat radiation pipe, a screen drum for layering carbonized materials and a turbine for driving the carbonized materials to move are arranged in the carbonization cavity in the axis direction, the heat radiation pipe penetrates through the carbonization cavity and extends to the outside, and the screen drum and the turbine are driven by a driving mechanism to rotate along with the carbonization cavity. According to the invention, an axial flow fan is used for guiding the crude coal flue gas into a combustion chamber for sufficient combustion, so that the crude coal flue gas replaces natural gas or fire coal to reduce the production cost, and the carbonization cavity is in a sealed anaerobic state, so that the carbonized material cannot generate open fire in the carbonization cavity, spontaneous combustion of the carbonized material is avoided, the ignition loss rate of the carbonized material is effectively reduced, the carbonized material is prevented from generating an ash layer, and the product quality index and yield are improved.