46results about How to "Avoid severe corrosion" patented technology

The present invention discloses a desulfurization and denitrification method for tail gas, used equipment and product application thereof. According to the method provided by the present invention, an oxidative catalyst is not used in a desulfurization column or a denitration column, or a small amount of the oxidative catalyst with a simplified formula added is used outside the desulfurization column and the denitration column, so that the cost is reduced significantly. The oxidative catalyst is not used in the desulfurization column or the denitration column to avoid the severe corrosion of the desulfurization column and denitration column texture by the material, so that the texture cost of the desulfurization column and the denitration column is reduced significantly; The volume of the processed material is small: only 30%-10% of the material in volume in the desulfurization column and the denitration column, and the cost for equipment corrosion prevention is lowered, so that a small amount of the oxidative catalyst used and a simplified formula can be facilitated.

The invention relates to a preparation method and an application of a hydrophobic starch sulfate ester in a cement water-reducing agent, and belongs to the fields of chemistry and chemical engineering. The preparation method comprises the following steps: adding a sulfamic acid, starch, urea, aliphatic tertiary alcohol or aryl methyl alcohol and water into a reactor under the conditions that the molar ratio of the sulfamic acid to the starch is (0.5-3.0):1, the molar ratio of the urea to the starch is (0.1-3.0):1, the molar ratio of the aliphatic tertiary alcohol or the aryl methyl alcohol to the starch is (0.1-1) and the adding amount of the water accounts for 10% to 30% of the dry weight of the starch; and reacting for 1 to 10 hours at a temperature of 80 DEG C to 150 DEG C, thereby obtaining the hydrophobic starch sulfate ester in which the sulfonyl substitution degree is between 0.04 and 0.89 as well as the alkyl substitution degree is between 0.01 and 0.2. The hydrophobic starch sulfate ester is applied to the cement water-reducing agent, wherein the mass percent of the hydrophobic starch sulfate ester accounts for 0.1% to 1.0% of that of cement. According to the method, a dry method and one-pot reaction are adopted, so that the environmental pollution caused by the application of an organic solvent is avoided. Thus, the production cost is decreased.

The invention discloses high-pressure anti-wear hydraulic oil, and belongs to the hydraulic oil field. The hydraulic oil comprises the following components in percentage by mass: 95-99% of base oil, 1.0%-1.5% of an extreme pressure anti-wear agent, 0.1-0.3% of a friction modifier; 0.4-1.0% of an antioxidant, 0.1-0.5% of an antirust agent, 0.1-0.5% of a metal deactivator, 0.02-0.1% of a detergent dispersant, 0.001-0.005% of an anti-foaming agent, and 0.1-0.5% of a demulsifying agent. Compared with the prior art, the hydraulic oil has the advantages of good viscosity-temperature performance, extreme pressure abrasion resistance, oxidation resistance stability, hydrolysis stability and thermal stability, and is not prone to aging and deterioration; the service life is prolonged, a friction pair can be normally lubricated under high-pressure and high-speed harsh conditions, and abrasion is reduced. The foam generated under the condition of violent mechanical stirring in the operation process can be quickly eliminated; air mixed in the oil can be released in a short time, and a static pressure can be accurately, sensitively and stably transmitted.

The invention relates to the technical field of organic light-emitting diode manufacturing, particularly to a silicon-based OLED micro display device and a preparation method thereof. The display device is composed of a silicon-based CMOS drive circuit substrate, a top light-emitting multilayer composite anode, a blue light organic light-emitting layer, an antireflection layer, a quantum dot colorfilter layer, an inorganic or polymer composite film sealing layer and a glass cover plate. In the preparation of the display device, a dry etching process is used for preparing composite anode pixelpoints, and a doping mode is used for realizing the preparation of a blue light organic light-emitting layer. The display device has the characteristic of low optical loss.

The invention discloses an embedded part construction process for an assembled building and belongs to the field of embedded part construction. According to the embedded part construction process forthe assembled building, by means of a double-way positioning mechanism, under the action of an upper hang-in-the-air positioning plate, an embedded part can be fixed into a form board from above in ahang-in-the-air state of no contact with the form board and a steel bar; meanwhile, under the action of an arch bridge positioning repair plate, a certain supporting force can be provided for the embedded part from below, thus the stability of the embedded part is effectively maintained, and occurrence of skewing of the embedded part during pouring is reduced; by means of the double-way fixing function on the embedded part, the workload of position adjustment of the embedded part at later stage is effectively reduced, and thus the efficiency of pouring the embedded part into a concrete layer of a pre-fabricated part is improved remarkably; and under the action of a foam board and a rainfall factor, moisture nearby the steel bar and the embedded part can be effectively absorbed, and the situation of severe rusting of the steel bar and the embedded part caused by too much accumulated water in the position where the steel bar and the embedded part are close to each other is effectively avoided.

The invention provides a gas stove. The gas stove comprises a burner assembly, a first-stage heat exchanger, a smoke absorbing assembly and a second-stage heat exchanger, wherein the first-stage heatexchanger is arranged in the burner assembly; the smoke absorbing assembly is connected to the burner assembly; the second-stage heat exchanger is arranged in the smoke absorbing assembly. The gas stove further comprises a water returning pipeline, a three-way valve, a heat supplying pipeline and a temperature detector; the water returning pipeline is correspondingly connected to a water inlet ofthe second-stage heat exchanger and a water inlet of the first-stage heat exchanger through the three-way valve; the temperature detector is used for detecting the water temperature of the water returning pipeline; and the controller is electrically connected to the temperature detector and the three-way valve. According to the technical scheme, the gas stove is capable of preventing smoke temperature from decreasing to be less than dew point temperature to generate a large number of condensate water through low-temperature in the water returning pipeline, and thus a smoke pipe is prevented from serious corrosion by excessive condensate water; and moreover, the potential risk caused by icing of the condensate water at an outlet of the smoke pipe can be solved.

The invention aims to provide an efficient regeneration type lithium bromide absorbing refrigerating and heating system for a cruise. Water serves as a refrigerating agent, a lithium bromide solutionserves as an absorbing agent, and a high-pressure generator, a first low-pressure generator, a second low-pressure generator, a condenser, a first evaporator, a second evaporator, a first absorber, asecond absorber, a first generator pump, a second generator pump, first to seventh heat exchangers, first to third three-way plug valves, a gas-gas heater, a high-temperature heat source water pump, ahigh-temperature heat source water tank, a turbocharger, a two-section type intercooler, a cylinder sleeve cooling water tank, a cylinder sleeve cooling water pump, a diesel engine cylinder sleeve cooling cavity, connection pipelines and throttling valves of all the components, and the like are included. The system can meet the refrigerating or heating requirements of the cruise under different working conditions and environments.

The invention discloses an overwater garbage salvaging solid-liquid separation device, and belongs to the technical field of overwater garbage salvaging. The device comprises a shell, a support plate,a first shell, second shells and salvaging mechanisms, wherein first sliding grooves are formed in the front side and the rear side of the upper surface of the shell correspondingly, first sliding blocks are slidably connected in the first sliding grooves, and the upper surfaces of the first sliding blocks are fixedly connected with the lower surface of the support plate. According to the device,a first motor, a winding wheel, fixing ropes and the two salvaging mechanisms are arranged, the first motor can drive the winding wheel to rotate when working, one of the fixing ropes can be unwoundand the other one of the fixing ropes is wound when the winding wheel rotates, at the moment, one of the salvaging mechanisms can move downwards when one of the fixing ropes is unwound, and the otherone of the fixing ropes can pull the other one of the salvaging mechanisms to move upwards, so that the salvaging mechanisms enter water to salvage garbage at any time, the situation that the salvaging mechanisms stop and cannot salvage the garbage is avoided, and the garbage salvaging efficiency is further improved.

The invention provides an internal-pressurized laser-electric arc combined sealing welding method for edge joints and relates to the field of machining engineering. The internal-pressurized laser-electric arc combined sealing welding method aims to solve the problems that flaws such as collapse, welding leakage and the like are easy to arise in big gap positions of edge joints of a thin-wall fueltank, and crack might be caused by non-gentle transition in welding roots. According to the internal-pressurized laser-electric arc combined sealing welding method for the edge joints, a laser-electric arc combined welding method is adopted; argon or a mixed gas of argon and carbon dioxide is introduced into the interior of the fuel tank before welding; welding is started after a protective atmosphere is formed; a protective gas is introduced continuously in the welding process; and the protective gas flow quantity is determined according to the gap condition of assembling of the fuel tank. Inthe process, because certain pressure exists in the reverse-side protective gas, a molten pool is extruded upwards; with optimized technological parameters of laser-electric arc combined welding coordinated, upward dents are generated in the welding joint bottoms until after-welding transition in positions where the gaps are bigger is relatively gentle. The internal-pressurized laser-electric arccombined sealing welding method is applied to the field of vehicle fuel tank manufacturing.

The invention discloses an electroplating method of samarium-cobalt magnetic steel. The electroplating method comprises the following steps of 1) carrying out pretreatment on the samarium-cobalt magnetic steel; (2) carrying out nickel electroplating treatment on the samarium-cobalt magnetic steel, specifically, firstly, carrying out nickel electroplating by adopting large-current impact with the electroplating time of T1, carrying out nickel electroplating by adopting normal current with the electroplating time of T2, and carrying out nickel electroplating by adopting low current with the electroplating time of T3, wherein T1 is less than T2 and T3; and 3) carrying out post-treatment on the samarium-cobalt magnetic steel subjected to nickel electroplating. During nickel electroplating, large-current nickel electroplating, normal-current nickel electroplating and low-current nickel electroplating are sequentially adopted to form different levels of current density electroplating combinations, samarium-cobalt magnetic steel parts are prevented from being corroded by an acid nickel plating solution during nickel plating, a nickel coating with a certain thickness and fine surface crystallization is formed, and the appearance and the protection performance of the nickel coating are ensured.