345results about How to "Eliminate corrosion" patented technology

The invention relates to a life-cycle water-free cooling solution which is characterized by comprising the following components in percent by weight: 10-50 percent of propylene glycol, 50-80 percent of ethylene glycol, 0.1-10 percent of triazole compounds, 0.5-3.0 percent of sebacic acid, 0.2-1.0 percent of adipic acid, 0.5-1.5 percent of sodium benzoate, 0.3-5 percent of inorganic base, 0.01-0.1 percent of antifoaming agent and 0.01-0.1 percent of colouring agent. The cooling solution has a freezing point of below -50 DEG C and a boiling point of 166-191 DEG C; and because the cooling solution does not contain water, problems of boiling, gas etching, evaporating, scaling, rusting and the like caused by water existing in the cooling solution are thoroughly eliminated, a steam air resistance layer seriously influencing heat radiation is avoided from generating, power of an engine can be effectively improved and fuel is saved. Because the cooling solution does not contain water and has a reasonable corrosion inhibition system, the problem of corrosion is thoroughly solved; and the cooling solution has a service life of reaching up to 8 hundred thousand kilometers, is added once without replacement, is a life-cycle cooling solution, is especially suitable for military vehicles, high-end vehicles and high-power heavy-loading trucks and passenger cars, and can ensure that the vehicles safely run under extremely hot weather, severe cold weather, and severe environments such as desert, plateau, snowfield and the like.

The invention discloses a method for preparing a silica aerogel composite material by adopting a chloride-free and alcohol-free process. The method comprises the following steps: S1, adopting a water-based silicon source as a raw material, regulating the pH value of sol with a chloridion-free acid, adding an additive after desalting, and uniformly stirring to obtain a first mixed solution; S2, immersing a fiber reinforced material into the first mixed solution, and completing gel curing; S3, standing the obtained composite gel material so as to obtain an aged composite gel material; S4, placing the aged composite gel material in a chloride-free and alcohol-free displacer to realize uniform solution infiltration; S5, performing surface methylsilane modification on the composite gel by usinga chloride-free surface modifier; S6, drying the modified composite gel, thereby obtaining the silica aerogel composite material. The invention provides a method for preparing the silica aerogel composite material without any chloride ion or alcohol substance in the formula.

The invention discloses a tube welding joint. The tube welding joint comprises a tube piece body and a connecting tube. The tube welding joint is characterized in that a joint socket of the tube piece body is provided with a conicity section part; the connecting tube is inserted into the joint socket of the tube piece body to form socket lapping and butt welding and molding. The invention also discloses a method for welding the tube welding joint. The method is characterized in that the method sequentially comprises the following steps: 1) pretreatment and preconfiguration; 2) placing of an inner gas protective device; 3) interface in-place of the socket lapping tube piece; 4) temporary fixing; and 5) butt welding and molding. A socket lapping mode and a tube joint mounting structure realize a smooth welding joint of which weld joint is in butt welding and double-sided molding, radically remove the existence of crack between socket cylinder bodies and remove silt of the tube port at the same time to form the smooth tube welding joint without any crack and clearance. The mounting mode realizes accurate and rapid joint mounting mode and has convenient operation and simple and reliable mounting. The tube welding joint can be widely applied to socket mounting of water, gas, steam and equipment supply for building, industrial fluid, food and medicine fluid and other pipe assembly.

The invention relates to a low-temperature halogen-free lead-free solder paste. The solder paste is mixed by Sn-Ag-Bi-based lead-free solder powder added with P or rare earth elements and a rosin-based soldering flux. The soldering flux is basically composed of, by weight, 30-45% of rosin resin, 2-10% of an organic acid activator, 3-5% of a thixotropic agent, 2-5% of a corrosion inhibitor, 3-5% of a surfactant and the balance solvents. The solder paste has the advantages that the welding temperature is low, slag is reduced, and the solder paste is suitable for manual welding and printing welding with poor thermal shock resistance.

The invention relates to a sea boat smoke exhaust washing device and a washing method. The device comprises a shell, a washing layer which is arranged at the upper part in the shell, a liquid collecting pool which is arranged at the lower part in the shell, a shell internal flue gas guide-in port arranged between the washing layer and the liquid collecting pool, a washing seawater inlet which is arranged above the washing layer and the cooler of the flue gas passage which is arranged between the shell external flue gas inlet and the washing layer; the method comprises the steps such as guiding in the flue gas, cooling and injecting the washing seawater and washing, etc. The invention provides the high-effect smoke exhaust absorption washing device and method which are suitable for high smoke temperature and narrow space of the sea boat, and has the advantages of high exhaust reduction efficiency, low running energy consumption, small volume and long service life.

The invention discloses a method and a system for purifying flue gas by inducing free radicals by virtue of ozone and hydrogen peroxide. The system is characterized in that a flue of a boiler is connected with one end of a flue gas heat exchanger, wherein the other end of the flue gas heat exchanger is connected to the bottom of a spraying washer; an injection hole of an ozone injection system is formed in a pipeline located between the flue gas heat exchanger and the spraying washer; a solution circulating by-pass system is connected with the top end and lower part of the spraying washer, respectively; the bottom of the spraying washer is sequentially connected with a mercury separation system, an ammonification neutralizing system and a product concentrating and crystallizing system; the top of the spraying washer is connected with a chimney through the pipeline and a flue gas waste heat system. According to the method, hydroxyl free radicals with strong oxidizing property are generated in an induction manner after the ozone in the flue gas is contacted with the hydrogen peroxide in spraying liquid; four main pollutants in the flue gas can be simultaneously removed, equipment is simple and reliable, and no secondary pollution is generated in a removal process. The method and the system are novel and have wide application prospects.

The invention relates to a flattener, relative thermal rolling band steel non-acid scaling device and method, wherein said flattener comprises a roller cleaner (15) whose end contacts the lower roller and compression lower roller (14); the cleaner (15) can clean the ferric oxide in each rotation of roller, to improve work efficiency. And the scaling device comprises emulsion feeder (1), flattener (2), high-pressure water injector (3), iron brush (4), washing drier (5), and coiling machine (6). The invention can improve the service life and effect of iron brush. And the method comprises that adjusting the injected amount of emulsion to adjust the scaling quality and save cost.

A dry sprinkler head which comprises a fail safe seat, and is fully adjustable.

The invention discloses a sustained circulating type method for adsorbing and recycling oil gas , which consists of the following steps: (1) adsorbing and recycling the oil gas by means of an active carbon bed in an adsorption tower; (2) the desorption and regeneration of the adsorption tower saturated is carried out; (3) the oil gas desorbed with high concentration enters a recovery tower to be absorbed by the body of liquid meager gasoline; (4) the tail gas in the recovery tower reenters the adsorption tower to be cycled in a sustaining way, wherein, at least two adsorption tanks in the adsorption tower alternately carry out adsorption and desorption generation, thus leading the oil gas adsorption to be carried out in a sustained circulating way, at the same time, the remote monitoring can be realized by using an automatic control program. The sustained circulating type method for adsorbing and recycling oil gas of the invention is characterized by high efficiency, low energy consumption, convenient operation and safe and reliable running.

A rail cover and support for mounting and insulating the rails of an electric transit system in which the rail cover is vulcanized both to the rail and outer skid support at the manufacturing site prior to delivery to the field and a rail cover completely surrounds both the base flange and web portion of each rail and terminates along the undersides of the top flange. In one form, the upper free ends of the rail cover are increased in thickness to form bumpers along opposite sides of the rail to cushion it against undue shifting or vibration. In fabricating the rail, a sheet dielectric material is vulcanized to the rail with or without a skid plate.

The invention discloses a method for preparing 5-hydroxymethylfurfural by taking cellulose as a raw material, which comprises the steps of: pretreating a biomass material rich in the cellulose by utilizing acid or alkali, neutralizing the biomass material, filtering to remove hemicellulose and lignin, washing obtained cellulose filter residue with water, and drying the cellulose filter residue; mixing the cellulose filter residue or pure cellulose with the water, loading the mixture into a high-pressure reactor, sealing the high-pressure reactor, and injecting liquid carbon dioxide into the reactor for reaction; and separating supercritical carbon dioxide dissolved with the 5-hydroxymethylfurfural through a separator during the reaction, discharging the 5-hydroxymethylfurfural from the bottom of the separator, and obtaining a 5-hydroxymethylfurfural product through drying, dehydration and crystallization. The method has the advantages of high selectivity, suitable continuous production, high product content, green and environment-friendly process, and easy industrialized production.

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 10-14 parts of polyepoxysuccinic acid amine, 35-40 parts of diethylenetriaminepentaacetic acid amine, 33-37 parts of hydroxyl succinic acid amine, 20-25 parts of polyacrylamide, 7-10 parts of sodium polyaspartate, 10-14 parts of sodium gluconate, 10-15 parts of activated clay, 20-25 parts of potassium peroxodisulfate, 9-11 parts of hydroxyl butanedioic acid amine, 4-7 parts of sodium salicylate, 5-9 parts of hexamethylene tetramine, 0.2-0.3 part of vanadium pentoxide, 2-5 parts of starch, 5-8 parts of alpha-sulphonated fatty acid methyl ester and derivative thereof (MES) and 0.1-0.3 part ofdiethyl ethanolamine. The neutral blockage removing agent composition is used for the blockage removal of an oil pumping well and a screw pump well in the oilfield, can effectively solve the problems of cleaning blockage removal of the oil pumping well and the screw pump well in the oilfield and the corrosion of oil recovery equipment, has high blockage removing speed, is neutral and is free of corrosion; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, no corrosion, dead angle, precipitation or secondary well blockage are generated, and more safety and more reliability are realized as compared with traditional pickling blockage removing, biological blockage removing and solvent blockage removing.

The invention provides a high-voltage DC transmission converter valve single-row valve tower which comprises a top shielding cover, a bottom shielding cover and a converter valve arranged between the top shielding cover and the bottom shielding cover, wherein the top shielding cover and the bottom shielding cover are arranged horizontally. The converter valve is connected with the top shielding cover and the bottom shielding cover through suspension insulators. The converter valve is formed by connecting converter valve modules, forming an inclination angle with the horizontal direction, in series in sequence in the vertical direction in the form of a zigzag rule. The high-voltage DC transmission converter valve single-row valve tower is more compact in overall structure and more reasonable in layout, and meanwhile, better solves the problems of high-frequency oscillation due to cooling water circuit insulation and connecting busbar inductance, reduces operational risks, and meets the design requirement for higher voltage and current level of the (ultra) high-voltage DC transmission converter valve.

The invention discloses a method for treating cane sugar factory wastewater comprehensively and using methane, which comprises the following steps: removing fibers and depositing coarse dregs in pretreated bagasse spray water, bagasse washing water, lime sludge filtered water, part of cooling water, papermaking alkaline wastewater, alkali reclaiming vaporization condensation water, and part of paper machine wastewater after reclaiming white slime of a cane sugar factory; mixing and properly heating all the water and delivering the mixture into an anaerobic reactor to perform anaerobic reaction; desulfurizing, decarburizing, purifying, filtering and compressing the obtained methane, and using the methane for heating a paper machine; and performing aerobic biochemical treatment on the sewage generated by the reaction in the anaerobic reactor so that the sewage reaches the discharge standard and is discharged, wherein sludge can be applied to preparing an organic compound fertilizer. The method can treat the sewage of the cane sugar factory comprehensively, can reclaim part of energy generated in the process of the wastewater treatment and apply the energy to production, thereby greatly reducing the production cost and bringing about better economic benefits and social benefits.

The invention discloses an ammonia flue gas desulfuration and denitration combined process and device. The process comprises the following steps: liquid ammonia is fed into a desulfurization tower, flue gas to be processed is sprinkled and pre-washed and then fed into the desulfurization tower for sprinkling desulfuration and denitration, and the flue gas subjected to sprinkling desulfuration and denitration is demisted and dried and then discharged out of the desulfurization tower; cleaning solution in a prewashing tower and for sprinkling and washing comes from serous fluid in a tower kettle of the desulfurization tower, and meanwhile, liquid ammonia is injected into the prewashing tower to adjust the pH value of the cleaning solution to be 2-4.5; and the cleaning solution in the prewashing tower is led out and added with lime milk, liquid ammonia is injected into the cleaning solution added with lime milk to adjust the pH value to be 6.0-7.5, and then the mixture is filtered and returned to a sprinkling layer of the desulfurization tower to sprinkle and wash the flue gas. The flue gas denitration efficiency, the natural oxidation rate of (NH4)2SO3 and the purity of the by-product (NH4)2SO4 are all improved to a larger extent; and corrosion of the serous fluid to the desulfuration system is eliminated and the service life of the desulfuration equipment is prolonged.

The invention discloses a process for leaching vanadium out of stone coal by using an oxidant and sulfuric acid. The process comprises the following steps of: crushing the stone coal, ball-grinding and sieving the crushed stone coal, leaching by using the oxidant and the sulfuric acid, deeply oxidizing, carrying out ion-exchange, carrying out molybdenum precipitation with an ammonium salt, calcining and the like to prepare a V2O5 product. The process is characterized in that the oxidant is a nitrite such as NaNO2, KNO2 and Ca(NO2)2, the consumption of the oxidant is 0.5-15 percent of the weight of stone coal mineral powder, the leaching rate of vanadium is above 95 percent, and the recycling rate of the vanadium is more than 80 percent. Compared with the traditional process for leaching the vanadium, the process has the advantage that the leaching rate of the vanadium is increased by 10-25 percent. The process has the advantages of eliminating pollution of Cl2 and HCl gases to the environment, saving energy resources, and greatly increasing leaching rate and recycling rate of the vanadium because a technology of leaching vanadium by using oxidized acid is adopted and a roasting process is eliminated.