32results about How to "Reduce oxidation efficiency" patented technology

The invention discloses a high-strength low-density steel welding process, which belongs to the technical field of steel processing. The temperature during welding can promote the thermal decomposition of calcium bicarbonate powder in the built-in storage cavity and generate a large amount of carbon dioxide gas. The increase of air pressure and temperature can make the thermally variable guide rope return to its high-temperature phase state, thereby lifting the rubber sealing sheet upwards, so as to promote the release of carbon dioxide. On the one hand, it can reduce The possibility of the external temperature of the steel is too high. On the other hand, the release of carbon dioxide can reduce the possibility of the steel being oxidized due to high temperature during the welding process. At the same time, the expansion of the attached guide ball can relieve the built-in magnetic The spherical magnetic shield makes the bottom of the anti-oxidation block stick closely to the steel, which can not only accelerate the thermal decomposition of the calcium bicarbonate powder, but also reduce the gap between the anti-oxidation block and the steel, thereby reducing the oxidation of the steel.

The present invention is synthesis process of caprolactam and its oligomer. Cyclohexane as initial material is nitrosated with nitroso sulfuric acid inside fuming sulphuric acid medium and in the presence of catalyst to synthesize caprolactam and its oligomer directly. The present invention has greatly simplified technological process, lowered cost and greatly raised resource utilization.

The invention discloses an engine exhaust device and an engine exhaust method, and relates to the technical field of engine exhaust gas treatment. The engine exhaust device includes a main pipeline, a bypass pipeline, a first temperature sensor and a second temperature sensor. The main pipeline is sequentially connected with a supercharger, DOC, DPF and SCR, and one end of the bypass pipeline is connected to the supercharger Between the device and the DOC, the other end of the bypass line can be communicated with the air inlet of the DPF. The first temperature sensor is arranged between the supercharger and the DOC for detecting the temperature of the exhaust gas entering the DOC; the second temperature sensor is arranged between the DPF and the SCR for detecting the temperature of the exhaust gas entering the SCR. The outlet port of the supercharger can selectively communicate with the inlet port or bypass line of the DOC. The exhaust device of the engine not only avoids the low oxidation efficiency caused by the rapid aging of the DOC, but also ensures the conversion efficiency of the SCR, so that the exhaust gas emission meets the requirements.

The invention discloses an assembled curtain wall panel unit and a curtain wall panel construction method, and relates to the technical field of curtain wall installation. The side is provided with a curtain wall connecting piece, the curtain wall unit is arranged on the dragon frame through the curtain wall connecting piece, one side of the dragon skeleton is provided with a basic connecting piece, and the dragon skeleton is arranged on the building through the basic connecting piece. The invention replaces the traditional sealing strip by setting the clamping piece, which is used to seal the gap between the aluminum alloy frame and the curtain wall glass, so as to avoid the large-area exposure of the sealing material to the outside, reduce its oxidation efficiency, and reduce the The possibility of dust and water entering the interior of the curtain wall unit, at the same time, a dehumidification unit is added to treat the moisture inside the curtain wall unit and keep the interior of the curtain wall dry.

The invention discloses a catalyst for simultaneous denitration, mercury removal and dioxin removal and a preparation method thereof. Cerium oxide and niobium pentoxide are used as catalytic active components, a mixture of nickel oxide and platinum nanoparticles is used as a co-catalyst, and hydrochloric acid is used to modify the catalyst. The titanium dioxide nanoneedles generated from tetrabutyl titanate were used as the main carrier, and the catalyst was used after hydrogen pretreatment. Based on the quality of the carrier, the mass percentage of the active component is 10% to 30%, and the mass percentage of the cocatalyst is 0.1% to 0.15%. The composite colloidal solution of active components and co-catalyst, and the optimized and modified catalyst carrier are evenly stirred, aged, extruded, dried and calcined. The catalyst is environmentally friendly, capable of high-efficiency denitrification, mercury and dioxin removal at the same time, with a wide active temperature range, SO 2 The oxidation efficiency is low. The denitrification and dioxin removal efficiencies are both greater than 95% at 240-500°C, and the mercury removal efficiencies are both greater than 99%. The product can be widely used in coal-fired power plants, chemical plants and other fields.

The invention provides a method and device for treating high-concentration nitrobenzene-containing waste water by using air-stripping-microelectrolysis-fenton oxidation method, belongs to the technical field of high-concentration nitrobenzene-containing waste water treatment, and aims to solve the problems that the fenton method is high in treatment cost and toxic intermediate products are easy to produce to cause secondary pollution, and the nitrobenzene contaminants cannot be mineralized into inorganic small molecular materials through a single micro electrolysis method. According to the method, air-stripping mass transferring between the high-concentration nitrobenzene-containing waste water and the air can be completed in a hypergravity device, after air stripping is finished, the waste water is introduced into a ferric-carbon microelectrolysis tank with a stirring device for microelectrolysis reduction reaction, then hydrogen peroxide is added into the microelectrolysis tank, ferrous ions in the waste water and the hydrogen peroxide form a fenton reagent, hydroxyl free radicals with a high oxidizing property can be generated, and finally organic matters in the waste water can be oxidized and degraded. The process is simple, the function of each technology is maximized, so that the purpose of using waste to treat waste is achieved, the treatment cost is reduced to the largest extent, the treatment efficiency is improved by 20%, the reaction time is shortened by 25%, and the treatment cost is greatly reduced.

The invention discloses a rare-earth-based catalyst achieving denitration, demercuration and dioxin removal simultaneously, a preparation method and application. Cerium oxide and erbium oxide are adopted as catalytic active components, a mixture of zirconium oxide and / or yttrium oxide and / or manganese oxide is adopted as a promoter, and titanium dioxide submicro spheres generated by optimizing andmodifying tetrabutyl titanate with hydrochloric acid are adopted as a main carrier. An active component and promoter precursor compound solution, the optimized and modified catalyst carrier and an organic forming additive are stirred to be uniform, mixed, aged and extrude-molded, drying and roasting are carried out, and the rare-earth-based catalyst is prepared. The catalyst is environmentally friendly, denitration, demercuration and dioxin removal can be carried out efficiently at the same time, the active temperature interval is wide, the mechanical strength is high, the oxidation efficiency of SO2 is low, and the cost is low. The denitration efficiency and the dioxin removal efficiency at the temperature of 220 DEGC to 400 DEG C are higher than 90%, and the demercuration efficiency ishigher than 95%. The rare-earth-based catalyst can be widely suitable for the fields of coal-fired power plants, chemical plants and the like.

The invention discloses a cathode roller edge grinding device for electrolytic copper foil, which comprises a cathode roller, an electrolytic cell and an L-shaped base plate, and the side wall of the L-shaped base plate is sequentially provided with an electrolyte scraping device and an oxidation degree detection device , Grinding and positioning box and drying device. There are two driving cylinders on one side of the L-shaped base plate. The execution ends of the two driving cylinders are connected to the grinding and positioning box through the L-shaped base plate. The grinding and positioning box is equipped with an airflow grinding device. And a wet grinding device; the airflow grinding device includes an air grinding positioning part and an airflow part; the wet grinding device includes a grinding disc grinding part arranged on the outer wall of the grinding positioning box and the execution end extends into the grinding positioning box, and the L-shaped base The plate is away from the outer wall of the side of the cathode roller and the pipeline is connected to the circulating rinsing part of the grinding positioning box. The circulating rinsing part is used to circulate the grinding liquid into the grinding positioning box. The invention is a grinding device which is convenient for reducing the oxidation rate of the edge of the cathode roll and collecting grinding objects.