31results about How to "Long restore time" patented technology

The invention discloses a low-nitrogen combustion technique based on circulating fluidized bed boiler. The circulating fluidized bed boiler comprises a boiler body, a cyclone separator, a deduster, an induced draft fan, a primary air supply system and a secondary air supply system which are connected in sequence. A smoke recirculation pipe is drawn out behind the induced draft fan. The primary air supply system and the secondary air supply system are connected to the smoke recirculation pipe in parallel. A burn-out chamber is arranged at an outlet of the cyclone separator. The low-nitrogen combustion technique based on the circulating fluidized bed boiler comprises the following steps that pulverized coal enters the boiler body under the action of primary air, specifically, the amount of smoke recirculation air in the primary air accounts for 8-10% the total air amount of the primary amount, and the amount of the primary air accounts for 40-45% of the total air amount; secondary air is introduced into the boiler body through the secondary air supply system, specifically, the amount of smoke recirculation air in the secondary air accounts for 12-14% the total air amount of the secondary air; fine flying ash enters the burn-out chamber; and over fire air is introduced into the burn-out chamber. According to the low-nitrogen combustion technique based on the circulating fluidized bed boiler, the burn-out chamber is arranged at the outlet of the separator, and part of smoke is mixed into the primary air and the secondary air, so that generation of NOx is reduced.

The invention discloses a method for preparing an aluminum-scandium intermediate alloy by using calciothermy. The method comprises the following steps of: (1) calculating the weights of halides of aluminum, metal calcium and scandium serving as raw materials, or scandium-containing fused salt, anhydrous calcium chloride and alkali chloride required for smelting in each furnace according to the component content of the aluminum-scandium intermediate alloy; (2) after uniformly mixing a flux, adding the flux into a crucible to smelt; (3) when the flux is completely smelted, adding scandium halide and preserving the heat in a closed protective atmosphere; (4) adding aluminum and metal calcium into the smelted scandium-containing fused salt, preserving the heat and thermally reducing for 20 to 200 minutes; (5) after finishing the thermal reduction reaction, slagging off, and adding an excessive amount of refining agent to remove the calcium, when the calcium content in the alloy is less than 50ppm, casting an ingot and cooling, and performing water leaching to remove slag so as to obtain the aluminum-scandium intermediate alloy. The method disclosed by the invention has the advantages of low fluorine, micro discharge, easiness in operation, steady aluminum-scandium alloy product, novelty and economy.

The invention relates to a QDF (quiescent direct furnace) direct reduction technology which comprises the following steps: uniformly mixing a metal-containing raw material and reducing agent powder, and putting into each reducing chamber, wherein in a reducing process, the reducing chambers and the reduced material are all kept in a stationary state; uniformly heating the materials in the reducing chambers by use of the heat generated by the combustion of the fuel in a combustion chamber and a combustion-supporting gas so as to perform a reduction reaction between the metal-containing raw material and the reducing agent, wherein each reducing chamber is a narrow long one-section reactor. According to the technology provided by the invention, the reducing chambers and the reduced material are all in a stationary state, the requirement on the strength of the granular raw material is reduced, and the production efficiency of a granulation process is improved; and the reducing time can be prolonged, and the metallization ratio of the reduction product is improved. The reducing chamber is not provided with a preheating area or a cooling area, the temperature is uniform, the atmosphere is uniform and consistent, and the overall quality of the reduction product is improved. The direct reduction technology has remarkable advantages of wide application range of raw materials, uniform temperature field, easy control on reduction process, high product metallization ratio, high yield and the like.

The invention relates to a fuel oil saving device of a vehicle, comprising two groups, i.e. a fuel oil magnetization processor and an oxygen increasing and supplementing device, wherein the fuel oil magnetization processor comprises two multi-gradient magnetization radiation areas, two stagnation areas and an output port, wherein each multi-gradient magnetization radiation area consists of a main body; each magnetic energy radiation area comprises an upper supporting plate, a lower supporting plate and a permanent magnet clamped between the upper supporting plate and the lower supporting plate, and the two magnetic energy radiation areas are arranged adjacently; the inlet end of the first magnetic energy radiation area is the first stagnation area, and a second stagnation area is positioned between the two magnetic energy radiation areas; the oxygen increasing and supplementing device comprises a space divider and an ozone generator, wherein the space divider comprises an air filter assembly, a fan assembly, a permanent magnet fastening end cover clamped between the upper supporting plate and the lower supporting plate, and the like and forms an integer with a shell; and a space divider assembly control power supply inside the ozone generator, a booster, a generating tube and a boosting pump are sequentially arranged on a base plate. The invention has high fuel oil saving efficiency and easy installation and debugging.

The invention discloses a preparation method for a fuel oil desulfuration adsorbent, and belongs to the technical field of fuel oil desulfuration. The method comprises the steps of dispersing CuCl2 and a carrier into a solvent and stirring until a solvent evaporates to obtain a carrier material which is uniformly loaded with CuCl2; putting a quartz tube containing the carrier material which is uniformly loaded with the CuCl2 into a heating furnace, introducing a mixed gas prepared from ethylene and an inert gas into the heating furnace for reduction reaction and cooling to a room temperature after reaction is completed to obtain the CuCl2-loaded adsorbent. The method is high in reduction rate and short in reduction time; compared with hydrogen, the reducibility of ethylene is relatively weak and monovalent copper is not reduced into pure copper; the ratio of the monovalent copper in a copper component of the obtained sample is relatively high; and the adsorption effect on thiophene sulfide in fuel oil can be improved.

The invention relates to a QDF electric steelmaking process. The process comprises the following steps: uniformly mixing an iron-containing raw material and a powdery reducing agent, and filling each reducing room, wherein the materials are in disperse and uniformly distributed state in the reducing room, and the reducing rooms and the reduced materials are maintained in static states in the reduction process; uniformly heating the materials in the reducing room by using the heat produced by the combustion of fuel and combustion-supporting gas in a combustion room to preform the reduction reaction on the iron-containing raw material and the reducing agent, wherein the reducing room is a narrow one-part form reactor; obtaining heat-state directly reduced iron after the materials in the reducing room are completely reacted, conveying the heat-state directly reduced iron to a charging device through a hot-delivery mode, and hot-filling an electric furnace to obtain molten steel. The process has the obvious advantages of being short in flow, strong in raw material adaptability, non-coke smelting, easy in control of the reduction process, sufficient in inter-process energy utilization, and capable of obviously reducing CO2 discharge; the process is a steelmaking method with shorter process flow, lower investment, lower cost and better environment protection in comparison with a converter steelmaking process.

The invention relates to high-efficiency denitration ionic liquid, which belongs to the technical field of smoke treatment. The high-efficiency denitration ionic liquid comprises the following components: 15 to 30 parts of urea-based organic peptide, 60 to 80 parts of deionized water, 5 to 10 parts of catalyst, 1 to 5 parts of stabilizers, and 1 to 5 parts of regulator. The components are added into a high-speed dispersion device to be dispersed at a high speed, and the stable high-efficiency denitration ionic liquid can be formed by virtue of the dispersion and reaction. An application methodof the high-efficiency denitration ionic liquid comprises the following steps: spraying the prepared ionic liquid into a denitration reactor by using a spray gun, wherein the application temperatureis 450 to 1250 DEG C. According to the high-efficiency denitration ionic liquid and the application method thereof, the high-efficiency denitration ionic liquid is colorless, tasteless and non-corrosive liquid, is safe in transportation and storage, convenient and simple to use, free from secondary pollution, wide in operating temperature range, and capable of being operated at 450 to 1250 DEG C;the method does not cause any crystallization and blockage when in operation; and after the product is put into the high temperature area, the smoke sufficiently contacts the denitration ionic liquid,so that the reduction time of the liquid catalyst and the smoke can be increased, and the escaping can be avoided.

The invention relates to a waste electromagnetic wire copper refining agent and a preparation method and application thereof. The refining agent is preferably composed of, by mass, 1.0-5.0% of V, 1.0-5.0% of Sr, 0.5-2.5% of B, 5.5-7.5% of Mg, 5-10% of Y, 5-10% of Ce and the balance Cu. According to the preparation method of the refining agent, Cu-B-Y-Ce-Mg intermediate alloy and Cu-Sr intermediate alloy are crushed into fragments with the particle size being smaller than 10 mm, and the fragments and vanadium with the particle size being smaller than 10 mm are mixed evenly according to a set proportion and then wrapped with a high-purity oxygen-free copper sheet to obtain the refining agent. The refining agent can be used for refining oxygen-free copper from waste copper electromagnetic wires, and the adding amount is 0.1-0.65 percent of the melt mass. The refining agent of the design has the good effects on deoxidation, desulfurization, dealumination, deferrization, denickelefication and the like, and does not pollute copper liquid secondarily. The refining agent is reasonable in component design and simple in preparation process and can achieve large-scale industrial application conveniently.

The invention discloses a secondary air distribution device used for a circulating fluidized bed boiler. The secondary air distribution device comprises the boiler, water walls arranged on the four walls of the interior of the boiler and provided with receding pipes and a secondary air system. The lower portion of the boiler is a dense-phase zone, and the upper portion of the boiler is a lean-phase zone. The secondary air system comprises a secondary air branch pipe, a plurality of secondary air stand pipes arranged on the outer side of the front wall of the boiler and the outer side of the rear wall of the boiler, and secondary air nozzles arranged on the water walls and connected with the secondary air stand pipes. The secondary air nozzles comprise the double nozzles and the single nozzles and are arranged in the lean-phase zone of the boiler in a layered mode. The receding pipes comprise the double-hole receding pipes and the single hole receding pipes. The disturbing effect of smoke in a boiler hearth is added through the secondary air distribution modes, fuel can be completely burnt, generation of NOx is reduced, grading of secondary air in the height direction is achieved, and grading of the secondary air in the horizontal direction is achieved.

The invention discloses a desulfurization and deoxygenation process for smelting precise or special alloys by using a medium-frequency induction furnace multi-slag method. The process is characterizedin that the capacity of a medium-frequency induction furnace is less than or equal to 6 tons, metal raw materials loaded into the furnace must be clean and rust-free, and pure iron is inserted into the furnace in the form of a cast rod. During smelting of one heat steel, the total number of times of repeated new slag making reaches two or more, crusting slag and flowing slag on the surface of a molten pool need to be removed clearly every time slag making is conducted, and a thin slag layer capable of covering the molten steel surface is reserved, and then new slag is made in time. The alkalinity of the slag is 3-3.6, and precipitation and diffusion deoxidation are preformed according to requirements. In the refining period, the temperature of molten steel is controlled to be 1590-1610 DEG C, and the tapping temperature is controlled to be 1610-1630 DEG C. After the molten steel is poured into a steel containing barrel, Ar is blown and stirred, and then the molten steel is cast into asteel ingot under an Ar gas protection device. According to the process, the contents of sulfur and oxygen in the steel can be remarkably reduced, and high-end metal products such as precision or special alloys for cold or hot working can be successfully smelted.

The invention discloses a comprehensive deoxidizing and desulfurizing process for smelting stainless steel by using a small-capacity AOD (Argon Oxygen Decarburization) furnace. The comprehensive deoxidizing and desulfurizing process is characterized in that the furnace capacity of the AOD furnace is less than or equal to 10 tons, and primary molten steel added into the AOD furnace meets the specified requirements. After the oxygen-blowing decarburization period ends, a chromium-rich slag pre-reduction period begins, Ar(N2) is blown for more than or equal to 6 minutes, and the temperature of the molten steel is controlled to be 1770-1820 DEG C. In the secondary slagging period, after 80 to 90 percent of slag in the furnace is removed, lime and fluorite meeting the specified requirements are added; and after secondary new slag is formed, a comprehensive deoxidizing and desulfurizing agent which is composed of a deoxidizing agent metal Al block, a composite deoxidizing and desulfurizing agent Si-Ca block and a composite deoxidizing and desulfurizing agent Si-Ca-Ba-Al block and meets the specified requirements is added, and Ar(N2) is blown for more than or equal to 6 minutes. The tapping temperature is 1600-1640 DEG C. According to the process, on the basis of the prior art, the oxygen content of steel is remarkably reduced, and the quality of high-end stainless steel for cold (hot) machining deformation is improved.

The invention discloses a circulating fluidized bed boiler device capable of effectively reducing emission of nitrogen oxide and particulate matter. The circulating fluidized bed boiler device comprises a boiler, a cyclone separator, a deduster, an induced draft fan, a primary air supply system and a secondary air supply system which are connected in sequence. A burn-out chamber is arranged at an outlet of the cyclone separator. Over fire air is introduced into the burn-out chamber. A smoke recirculation pipe is drawn out behind the induced draft fan. The primary air supply system and the secondary air supply system are connected to the smoke recirculation pipe in parallel. According to the circulating fluidized bed boiler device capable of effectively reducing emission of the nitrogen oxide and the particulate matter, a smoke recirculation mode is adopted, part of the smoke is mixed into primary air and secondary air, generation of NOx is effectively reduced, grading of the secondary air in the height direction and in the horizontal direction is achieved through the secondary air arrangement mode, the burn-out chamber is arranged at the outlet of the separator, the carbon content of flying ash is reduced, and the contradiction between NOx emission reduction and high carbon content of the flying ash due to the fact that oxygen content in a combustion furnace is reduced can be effectively solved.

The invention relates to methods for smelting nonferrous metal and provides a magnesium smelting method capable of shortening a reduction period, aiming at solving the problem of long reduction period caused by the relatively-large temperature decreasing amplitude of a furnace after cold pellets enter a reduction pot. The method comprises the process steps of calcining dolomite, carrying out ballmilling, pelletizing and carrying out reduction, and the pellets formed by pelletizing are preheated prior to reduction, wherein the temperature for preheating is 600-780 DEG C and the time for preheating is 1.5-3 hours. Compared with the traditional method, the magnesium smelting method has the advantages that: the reduction period is shortened to 6-8 hours from 7-12 hours, the reduction period is obviously shortened, the efficiency for magnesium smelting can be increased, and the production cost is lowered.

The invention provides a modified reduced graphene oxide binder and a preparation method and application thereof.The preparation method comprises the steps that graphene oxide is evenly dispersed in an N-methyl pyrrolidone (NMP) solution, then ascorbyl palmitate powder is added, or the ascorbyl palmitate powder is pre-dispersed in the NMP solution, the mixture is fully stirred for 2-5 h, and the modified reduced graphene oxide binder is obtained; and reacting for 3-5 minutes under the microwave energy of 500-800W, and carrying out suction filtration on redundant solution to obtain the modified reduced graphene oxide binder. According to the invention, grafting of ester bonds and excellent properties of graphene enable the graphene to have high mechanical stress and friction coefficient, high defect density and a multi-dimensional conductive network to facilitate transmission of lithium ions, N-L-rGO is used as a binder to reduce the requirements of production environment, and the materials are still uniformly mixed in a high-humidity environment; and in addition, excellent rate capability and cycling stability are shown in electrochemical performance.