The method of carbonization of wood pulp
(57) Abstract:The method of carbonization of wood pulp relates to the production of active carbon and organic products from carbonaceous raw materials and can be used in the woodworking industry for disposal of wood waste. The method of carbonization of wood pulp includes its heat treatment in oxygen-depleted atmosphere, what's new is that thermal treatment is carried out in the antinodes of the standing wave of the microwave electromagnetic field when the value of the summed specific microwave power for at least 2 watts/cm3and oxygen-depleted atmosphere is created by the flow of one or more non-supportive combustion gases, consumption of which is not less than 0.1 l/min. Free combustion gases selected from a number of: nitrogen, carbon dioxide, argon, helium and other inert gases. The invention solves the problem of creating a single-stage continuous, more environmentally friendly by eliminating the introduction of an additional reactive additives method of carbonization of wood pulp. 1 C.p. f-crystals. The invention relates to the production of active carbon and organic products from carbonaceous raw materials and can be used in the reading processing of carbon-containing raw material in the apparatus for active coal in the fluidized bed, includes pre-heating the raw material at a temperature of 100-150oWith low-temperature carbonization at a temperature of 400 to 500oWith high-temperature carbonization at a temperature of 750-850oWith and activation of the solid product of the carbonization gas-vapor mixture (USSR Author's certificate 467761, From 01 To 31/08, 1972).The disadvantage of this method is the complex technology of the process, high energy density, relatively high temperature.The known method of carbonization of wood pulp, which consists in mixing with the reaction additives, pre-heating of raw materials to a temperature of 150-200oWith the removal of the resulting resinous product and vaderlandsche condensate and thermochemical decomposition at a temperature of 600-700oC in oxygen-depleted atmosphere (RF Patent 2174098, From 01 To 31/08. Publ. 2001.09.27). However, this method, allowing to obtain high quality active carbon, is a multistage requires additional chemicals and leads to additional environmental pollution by products of thermochemical processes.The present invention solves the problem of creating one continuous, ecologicas is Itachi wood pulp.This object is achieved in that in the method of carbonization of wood pulp, including its heat treatment in oxygen-depleted atmosphere, what's new is that thermal treatment is carried out in the antinodes of the standing wave of the microwave electromagnetic field when the value of deciding on a specific microwave power for at least 2 watts/cm3and oxygen-depleted atmosphere is created by the flow of one or more does not support combustion gases, consumption of which is not less than 0.1 l/minDoes not support combustion gases selected from a number of: nitrogen, carbon dioxide, argon, helium and other inert gases. The most sophisticated economic considerations are nitrogen and carbon dioxide as the inert gases are more expensive and their consumption because of the greater volatility above.The flow of inert gas is determined by the resistance zone of carbonization (newsplease) wood pulp in the microwave field.Implemented method as follows: the electromagnetic energy of the microwave field from the microwave source in a rectangular waveguide is fed into the zone of intersection of the flow of pulp through the pipe from transparent to microwave field of the material (for example, quartz glass, paligorova ceramics and so on). In the area Perez is th standing wave of the microwave field, where is the carbonization process in oxygen-depleted atmosphere by supplying this area with any perspective combustion inert gas.To protect the microwave generator from the reflected wave between the microwave generator and the zone of carbonization is advisable to install the appropriate security device (circulator, dual slotted bridge, etc).Continuous carbonization process is determined by the continuity of the movement of wood pulp.For condensate and gas tar substances in the pipe in which it is moving wood pulp, are special channels.Example 1
Conducted carbonization of sawdust and shavings (after electric fuganka) in the electromagnetic microwave field frequency of 2.45 Hz, adding to the atmosphere of the working chamber nitrogen. The summed value of microwave power was 600 W. With short piston mounted on the end of the rectangular waveguide tract (size 9045 mm) in the zone of intersection of the flow of wood pulp (diameter 80 mm) with the electromagnetic field is set to the maximum (antinode).The nitrogen flow rate was 0.1 l/minThe time of passage of the pulp zone abrabo, that in example 1. Just as wood pulp took sawdust mixed with the shavings in the ratio of 1:1 by volume. As the inert combustion gas filed carbon dioxide. The summed value of microwave power was 600 W, the processing time wood pulp was 2.4 minutesIn the wood pulp turned into charcoal.Example 3
Same as in example 2. Only as inert combustion gas filed argon in a quantity of 0.2 l/min. Value summed up the microwave power was 600 W, the processing time wood pulp was 3 minutesIn the wood pulp turned into charcoal.Example 4. Same as in example 1. Just as wood pulp took sawdust mixed with the shavings in the ratio of 1:2 by volume. As the inert combustion gas was applied to the xenon in the amount of 0.15 l/min, the summed Value of microwave power was 600 W, the processing time wood pulp was 2 minutesIn the wood pulp turned into charcoal.Example 5. Same as in example 1. Just as wood pulp took sawdust mixed with the shavings in the ratio 2:1 by volume. As inert the time of processing wood pulp was 3.5 minutesIn the wood pulp turned into charcoal.Example 6. Same as in example 1. Just as wood pulp took sawdust mixed with the shavings in the ratio of 1:3 by volume. As the inert combustion gas filed helium in the amount of 0.3 l/min. Value summed up the microwave power was 600 W, the processing time wood pulp was 4 minutesIn the wood pulp turned into charcoal.Thus, the proposed method allows you to create a one-step, continuous, more environmentally friendly by eliminating the introduction of an additional reactive additive process. 1. The method of carbonization of wood pulp, including its heat treatment in oxygen-depleted atmosphere, wherein the heat treatment is carried out in the antinodes of the standing wave of the microwave electromagnetic field when the value of the summed specific microwave power for at least 2 watts/cm3and oxygen-depleted atmosphere is created by the flow of one or more non-supportive combustion gases, consumption of which is not less than 0.1 l/min2. The method according to p. 1, characterized in that the free combustion gases viber
FIELD: production of charcoal-fibrous adsorbents.
SUBSTANCE: the invention is dealt with the field of production of charcoal-fibrous adsorbents, in particular, with devices of charcoal-fibrous materials activation. The installation contains a vertical furnace for activation of a carbon fabric and a conjugated with it steam generator, which are connected to the power source and a control unit. And at the furnace output there is a reception device. At that the furnace contains a through heated muffle, through which the treated charcoal-fibrous fabric is continuously passing. At that the muffle is located inside the detachable heat-insulating furnace body, on the inner side of which there are heating elements. Besides at the furnace outlet there is a movable container with water, in which the lower end of the through muffle is dipped. The invention offers an installation for production of activated charcoal-fibrous material, which ensures a continuous process of treatment of the charcoal-fibrous material with an overheated steam and formation of the activated fabric with high mechanical properties and a cellular structure, simple in assembly and reliable in operation.
EFFECT: the invention ensures production of the activated fabric with high mechanical properties and a cellular structure, simple in assembly and reliable in operation.
8 cl, 4 dwg
FIELD: sorption technique for purification of industrial emissions and individual pipe security facilities.
SUBSTANCE: method for production of sorbent catalyst includes preparation of impregnating solution by introducing ammonium carbonate and copper and chromium compounds into ammonia water in ratio ammonia water/ammonium carbonate/copper basic carbonate/chrome anhydride of 1:(0.07-0.15):(0.03-0.06):(0.02-0.04); impregnation with metal-containing carbon solution; aging; and granule thermal treatment.
EFFECT: sorbent catalyst with prolonged protective action in relation to chlorocyanide and decreased cost.
4 cl, 3 ex
FIELD: sorption technology; cleaning waste industrial gases; individual protective means (gas masks and respirators).
SUBSTANCE: proposed method includes carbonization, activation and impregnation of warp with ammonia solution containing catalytic additives of copper, chromium, silver and triethylenediamine followed by removal of excess of solution, aging, heat treatment and cooling; used as warp is non-woven viscose material which is carbonized at temperature of 340-400°C and impregnated at volume ratio of non-woven material and impregnating solution of 1 : (14-18); excessive impregnating solution is removed by squeezing to ratio of material and solution of 1 : (4-5); after heat treatment, product is cooled at rate of (1.5-4)°C; concentration of catalytic additives in solution is as follows, mass-%: copper, 0.3-0.4; chromium, 0.12-0.16; silver, 0.01-0.02 and triethylenediamine, 0.05-0.08.
EFFECT: improved sorption ability by decane at retained adsorption ability by chlorocyanogen; reduced resistance of layer.
2 cl, 3 ex
FIELD: production of activated carbon for medicine, production of drugs and high-purity agents; thorough cleaning of gaseous and liquid media from low-molecular, medium-molecular and high-molecular admixtures.
SUBSTANCE: proposed method includes mixing of thermoreactive organic liquids and hardening catalyst, forming spherical granules at viscosity of 10-30 cSt heated to 90-120°C, hardening of spherical granules and separation of them from oil, carbonization and vapor-and-gas activation of granules and their screening-out. Time of presence of spherical granules in heated oil during which they undergo gelatinization and poly-condensation stages is 10-30 s, after which spherical granules are kept under layer of oil for 2-10 h till complete hardening. Carbonization is performed in carbon dioxide medium at temperature of 650-850°C at rate of 6-10°C/min. Vapor-and-gas activation is performed at temperature of 850-950°C. Proposed method makes it possible to control parameters of activated carbon of micro-, meso- and macro-structure.
EFFECT: possibility of producing activated carbon possessing high adsorption ability to admixtures containing gaseous and liquid media.
4 cl, 3 ex
FIELD: heat treatment of solid carbon-containing materials for production of activated carbon.
SUBSTANCE: proposed method includes heating and carbonization of raw material in horizontal rotary furnace at continuous mode for 1.0-3.0 h at temperature of 650-850°C and rate of heating not exceeding 10°C/min; method includes also delivery of formed carbonisate to vertical activation furnace by batches without cooling them; activation of each batch is continued for ≤30 min at temperature of 750-950°C in mode of layer suspended by jet of gaseous activating agent; new batch of carbonisate is delivered after unloading the batch of finished product; proposed method includes also delivery of vapor-and-gas mixture from activation furnace to carbonization furnace in counter-flow of material being carbonized, directing the vapor-and-gas mixture from carbonization furnace to waste-heat boiler for after-burning, generation of low-pressure steam required for preparation of activating agent and decontamination of flue gases formed in waste-heat boiler.
EFFECT: intensification of heat-exchange process; improved quality of activated carbon; improved economical parameters due to saving of fuel; reduction of technological process duration.
5 cl, 1 dwg, 2 tbl, 4 ex
FIELD: carbon materials.
SUBSTANCE: preparation of carbon material from organic raw material comprises carbonization of raw material in non-oxidative medium and activation by oxygen-containing agents at 750-900°C, said raw material being sapropel with content of organic substance 55-98%. Raw material is preliminarily cooled to 0-(-50)°C and carbonization is carried out at 300-700°C until summary pore volume 0.3-2.5 cm3/g and average macropore radius 100 to 5000 nm are obtained at following size distribution of pore radius: 60-80% above 100 nm, 15-30% 2-100 nm, and 1-10% below 2 nm based on total pore volume. Carbonized product is activated to give following size distribution: 50-75% above 100 nm, 20-40% 2-100 nm, and 1-15% below 2 nm. Material having mainly macroporous structure can be used as carrier in preparation of various-type catalysts and as matrix in preparation of deposited sorbents.
EFFECT: optimized preparation process conditions.
1 tbl, 18 ex
FIELD: carbon materials and medicine-destination sorbents.
SUBSTANCE: mobile granulated carbon black bed having specific surface 35-80 m2/g id heated to 700-900°C and then subjected to pyrolytic compaction accomplished by feeding gaseous and vaporous hydrocarbons into carbon black bed and two-step deposition of pyrolytic carbon layer on carbon black particles. Carbon black is first compacted to achieve loose density of granules 0.45-0.65 g/cm3 followed by isolation of granule fraction 0.50-1.20 mm in diameter, after which moving material bed is activated with water steam at bed temperature 800-900°C to achieve total pore volume in product 0.3-0.5 cm3/g.
EFFECT: achieved size uniformity of granules and reduced content of dust inside pores and on the surface of granules.
3 cl, 2 ex
FIELD: chemical technology, sorbents.
SUBSTANCE: invention relates to sorption technique. Invention proposes a method for preparing a chemosorbent involving preparing an impregnating solution containing ferric (III) chloride, impregnation of activated carbon grains with this solution followed by their thermal treatment. Impregnation is carried out in the ratio carbon mass to volume of impregnating solution from 1:0.66 to 1:0.9 and thermal treatment is carried out at 100-109°C. The content of ferric chloride in the ready product is 3.5-6.5 % by mass. Proposed method provides preparing sorbent with high absorptive capacity by mercury vapors. Invention can be used for removal of toxic substances from air and for solution of broad spectrum of ecology problems.
EFFECT: improved preparing method of chemosorbent.
2 cl, 3 ex
FIELD: carbon materials.
SUBSTANCE: invention provides a three-step method for modifying industrial activated carbon. In the first step, activated carbon is treated for 12 -24 h with ε-caprolactam aqueous solution under static conditions. Then, activated carbon is filtered, dried, and heated at 250°C in air atmosphere. Finally, it is subjected to carbonization by heating to 900°C in inert gas (argon or nitrogen) flow.
EFFECT: increased sorption capacity relative to organic compounds and heavy metal ions.
2 tbl, 2 ex
FIELD: production of the semi-coke; methods and devices for production of the semi-coke.
SUBSTANCE: the invention is pertaining to production of the semi-coke and may be used in production of the semi-coke. The method of production of semi-coke provides for air feeding air supply into the shaft furnace from the both sides of the coal layer, kindling of the coal and withdrawal of the flammable gas in the coal layer middle cross-section. The device for realization of the method is made in the form of the vertical apparatus of the shaft type, divided into two halves and containing two working chambers: the upper chamber and the lower chamber with provision of a capability of the air blowing from above and from below and withdrawal of the flammable gas in the middle cross-section of the layer. The invention ensures the increased productivity.
EFFECT: the invention ensures the increased productivity.
2 cl, 1 dwg, 1 ex