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

The invention discloses a circulating fluidized bed boiler system for achieving low nitrogen oxide discharge. The circulating fluidized bed boiler system comprises a boiler, a cyclone separator, a dust remover and an induced draft fan which are sequentially connected. The circulating fluidized bed boiler system further comprises a primary air supply system and a secondary air supply system. A flue gas recirculation pipe is guided out of the rear portion of the induced draft fan and connected with the primary air supply system and the secondary air supply system in parallel. The secondary air supply system comprises a secondary air fan, a secondary air pipe, a plurality of secondary air vertical pipes arranged on the outer sides of a front wall and a rear wall of the boiler and secondary air nozzles, wherein the secondary air nozzles are arranged on a water cooling wall, connected with the secondary air vertical pipes and arranged in a dilute phase area of the boiler in a layered manner. According to the circulating fluidized bed boiler system, part of flue gas is mixed into primary air, the fluidization characteristic of a dense phase area during low-load running is improved, part of flue gas is mixed into secondary air, the air speed of the secondary air nozzles can be increased easily, a local high-temperature area is avoided, and generated NOx is reduced. By means of the secondary air arrangement manner of the system, the disturbance function of the flue gas in a hearth is increased, fuel is combusted fully, and the generated NOx is reduced.

The invention discloses a graphene aerogel and a preparation method and an application thereof, wherein the aerogel is prepared from the following method: (1) pre-reduction treatment: adding a reducing agent to a graphene oxide solution, mixing, carrying out ultrasonic dispersion, and carrying out pre-reduction treatment, to obtain a semi-reduction graphene hydrogel; (2) final reduction treatment:adding a reducing agent, carrying out ultrasonic treatment, and then carrying out final reduction treatment, to obtain a graphene hydrogel; and (3) acid / alkali soaking: placing the graphene hydrogelin an acid or alkali aqueous solution, soaking, washing the hydrogel to be neutral, sucking out the excess liquid, and carrying out freeze drying, to obtain the graphene aerogel. The graphene aerogelis applied to electromagnetic wave absorption materials. The graphene aerogel obtained by the method has small density and good integrality, and has a certain mechanical strength and resillency; the prepared wave absorbing material has good electromagnetic wave absorption performance, and the wave absorbing performance can be adjusted; and the method has the advantages of simple process, short production cycle, low cost and good benefits, and is suitable for industrialized production.

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 to200 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 discloses a preparation method of nano-scale platinum (Pt) using an open-loop reduction system. The preparation method comprises the steps of: utilizing carbon nanotubes (CNTs) as a catalyst support; mixing platinum salt with a reducing agent and deionized water to form a precursor solution in a flask; heating the precursor solution in the flask at a predetermined temperature range to reduce nano-scale platinum nanoparticles on the carbon nanotubes by the process of water evaporation; allowing the water vapor to flow through a connection tube to a condenser; filling a cooling substance into the condenser via the first opening and draining the cooling substance from the condenser via the second opening to lower the temperature of the water vapor in the inner tube by the cooling substance and condense the water vapor into liquid water, which is collected with a beaker placed under the condenser.

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 high-efficiency denitrification ionic liquid of the present invention belongs to the technical field of flue gas treatment, and comprises the following components: 15-30 parts of urea-based organic peptide, 60-80 parts of deionized water, 5-10 parts of catalyst, 1-5 parts of stabilizer, and regulator 1-5 parts, the above ingredients are added to the high-speed dispersion equipment for high-speed dispersion, and the dispersion reaction forms a stable and efficient denitrification ionic liquid; the method of using the high-efficiency denitrification ionic liquid is to spray the configured ionic liquid into the denitrification reactor with a spray gun , the operating temperature is 450-1250°C. The high-efficiency denitrification ionic liquid and its use method of the present invention, the high-efficiency ion denitration liquid is a colorless, odorless, non-corrosive liquid, which is safe in transportation and storage, convenient and simple to use, and has no secondary pollution. The product has a wide operating temperature range and can It operates at 450-1250°C; this method does not produce any crystallization and blockage; after the product is put into high temperature area, the flue gas is fully contacted with the denitrification ion liquid, which increases the reduction time of the liquid catalyst and flue gas to avoid escape.

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 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 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 mainbody; 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 circulating fluidized bed boiler for effectively reducing oxycarbide emission. The circulating fluidized bed boiler for effectively reducing oxycarbide emission comprises a combustion furnace, a cyclone separator connected with the combustion furnace, and a secondary air system for arranging secondary air. An outlet of the combustion furnace is connected with an inlet of the cyclone separator, a burn-out chamber is arranged at an outlet of the cyclone separator, and overfire air is introduced into the burn-out chamber. The secondary air system comprises a secondary air pipe, a plurality of secondary air vertical pipes arranged on the outer sides of a front wall and a back wall of the combustion furnace, and secondary air nozzles arranged on a water-cooled wall and connected with the secondary air vertical pipes. According to the circulating fluidized bed boiler for effectively reducing oxycarbide emission, part of flue gas is mixed with primary air and secondary air, so that NOx emission is reduced; secondary air classification in the height direction and the horizontal direction is achieved through a secondary air arrangement mode; the burn-out chamber is arranged at the outlet of the separator, carbon in fine flying ash at the outlet of the separator is burned again in the burn-out chamber, the carbon content of the flying ash is reduced, and thus the contradiction caused by reduction of the oxygen content of the combustion furnace between NOx emission reduction and the high carbon content of the flying ash can be overcome effectively.