30results about How to "Simple cooling process" patented technology

The invention relates to steel for an ultra-high-strength sucker rod and a production method thereof. The steel for an ultra-high-strength sucker rod is prepared from the following components: 0.07-0.13wt% of C, 4.0-7.0wt% of Cr, less than 0.50wt% of Mn, less than 0.50wt% of Si, 0.30-0.60wt% of Mo, 0.05-0.15wt% of V, 0.01-0.03wt% of Ti, less than 0.008wt% of P, less than 0.002wt% of S, 0.01-0.05wt% of Al, and the balance of Fe and unavoidable impurities; the steel also can contain less than 0.50wt% of Ni. For the steel for an ultra-high-strength sucker rod, a high-temperature tempered martensite structure can be obtained by adopting a super-clean steel smelting technology with low cost and a heat treatment process including normalizing and high-temperature tempering, nano Cr, V, Mo composite nanoparticles are used as precipitation strengthening phases, and the yield strength can reach 800MPa grade, and the steel disclosed by the invention has the corrosion resistance prior to that of KD-grade steel 20Cr2MoNiA for a sucker rod and can be used for producing H-grade ultra-high-strength corrosion-resistant steel sucker rods.

According to a trend of flue gas, the flue gas purification device for improving waste heat utilization rate and denitration rate includes a primary adsorption column and a secondary adsorption columndisposed downstream the primary adsorption column. An original flue gas conveying pipeline is connected to a flue gas inlet of the primary adsorption column; a flue gas outlet of the primary adsorption column is connected to a flue gas inlet of the secondary adsorption column through a first pipeline; the device further comprises an analytical tower; a heating section and a cooling section are disposed on the analytical tower; the lower part of the heating section is provided with a heating section gas inlet, and the upper part of the heating section is provided with a heating section gas outlet; and the heating section gas outlet of the analytical tower is connected to the flue gas inlet of the secondary adsorption column by a second pipeline. The device introduces a part of exhausted hot air after heat exchange with to-be-analyzed activated carbon into the flue gas inlet of the secondary adsorption column, and on one hand, the concentration of exhausted SO<2> is removed, and simultaneously flue gas at the inlet of the secondary adsorption column is heated to improve the temperature of the flue gas.

The invention provides high-manganese pipeline steel and a preparation method thereof. The high-manganese pipeline steel is prepared from the following ingredients in percentage by weight: 0.4 to 0.7percent of C, 13 to 17 percent of Mn, 0.5 to 0.8 percent of Mo, 0.9 to 1.1 percent of Cr, 0.2 to 0.4 percent of Si, less than or equal to 0.010 percent of P, less than or equal to 0.003 percent of S,0.02 to 0.03 percent of Al, 0.02 to 0.03 percent of Nb, 0.03 to 0.06 percent of V and the balance of Fe and unavoidable impurities. The preparation method comprises the following steps of performing melting, casting and blank forming according to the high-manganese pipeline steel ingredients proportion; heating a cast blank to 1,200 to 1,250 DEG C; performing heat insulation for 1 to 2 hours; performing alloy element complete solid solution; performing sufficient tissue austenitizing; rolling the cast blank subjected to heat insulation; controlling the initial rolling and final rolling temperature and press-down quantity; cooling the materials to the room temperature after the rolling completion; obtaining the high-manganese austenitizing pipeline steel. The method has the advantages thatthe process is simple; the prepared high-manganese pipeline steel has ultralow yield ratio, higher tensile intensity, uniform elongation rate and excellent anti-corrosion performance, and is suitablefor being used as an oil gas conveying pipeline material in an extreme environment.

The invention discloses a low-temperature cooling system and belongs to the technical field of design and manufacture of medical apparatus and instruments. The invention provides a low-temperature cooling system through which the cost can be obviously reduced in the process of cooling a superconducting magnet in a temperature area from 300K to 4.2K. The low-temperature cooling system comprises a low-temperature refrigerated container, a low-temperature refrigerating unit, a liquid nitrogen container with a mounting channel, a cold shield with a perforation, and a 300K container with a connecting flange, wherein the liquid nitrogen container is positioned in the cold shield; the cold shield is positioned in the 300K container; the low-temperature refrigerating unit comprises a primary refrigerating unit, a secondary refrigerating unit and a primary hot link; the low-temperature refrigerating unit is arranged in the mounting channel through a top wall of the low-temperature refrigerated container; the secondary refrigerating unit is positioned in the mounting channel; the low-temperature cooling system also comprises a heat exchange cold guiding device positioned at the middle lower part of the mounting channel; the heat exchange cold guiding device is connected to the tail end of the secondary refrigerating unit of the low-temperature refrigerating unit.

This invention discloses an integrated apparatus for producing synthesis gas from high-volatile coal. The apparatus is composed of an upper drying and retorting section, a middle conversion and gasification section, and a lower liquid slag discharge section. The upper drying and retorting unit comprises: a sealed coal container set at the top, a pyrolysis coal gas outlet at the upper part, and a synthesis gas outlet at the middle part. The conversion section has a pyrolysis coal gas inlet at the bottom, and is connected with the retorting section and the gasification unit at the top and bottom, respectively. The conversion and gasification section has refractory lining inner wall and water jacket outer wall, and the water jacket comprises: a cooling water inlet, a cooling water outlet, and a liquid / solid slag discharge structure. The slag discharge section comprises: an upper slag discharge port, a middle slag-quenching chamber and a lower sealed slag hopper. The apparatus integrates pyrolysis, gasification and pyrolysis coal gas conversion to produce synthesis gas, and has such advantages as high resource utility, little pollution, and high profit.

The invention discloses a fully automatic periodic roller resistance furnace, which comprises a furnace body, side plates are arranged on both sides of the furnace body, a bottom plate is fixed between the lower ends of the side plates, and a bottom plate is fixed between the middle parts of the side plates. There is a partition, the furnace body is fixed on the partition, the inner wall of the furnace is fixed with a heating element, the furnace body is provided with a retort, one end of the retort is provided with a discharge bin and the furnace The tank and the discharge bin are rotatably connected to the discharge bin through a graphene rotating bearing, and a drive shaft is fixed at one end of the retort away from the discharge bin, and the drive shaft extends out of the furnace body and The outer wall fixing sleeve is provided with a limiting plate and a first sprocket. Beneficial effects: the raw material can be directly cooled, and the furnace tank can be quickly cooled in an emergency, so that the cooling process can be simplified, the production efficiency is high, and the equipment is small in size and weight, which is beneficial to cost reduction and easy to use.

The invention relates to a rock powder shaped emulsion explosive and manufacturing method thereof, wherein the explosive comprises (by wt. portions) ammonium nitrate 87-93, assisting solvent 1-3, organic oily phase material 4-6, macromolecular emulsifying agent 1-3, and water 1-5. The preparation process comprises the steps of, charging aqueous phase into agitated oily phase, emulsifying into water-in-oil type emulsion, and making emulsion rock powdery explosive through cold air blast modeling.

The application discloses an acid-resistant martensitic wear-resistant steel plate, which includes 0.14wt%≤C≤0.22wt%; 0.30wt%≤Si≤0.60wt%; 0.30wt%≤Mn≤1.00wt% in mass percentage; 0.010wt%≤Ti≤0.020wt%; 0.02wt%≤Nb≤0.04wt%; 0.50wt%≤Ni≤1.0wt%; 0.20wt%≤Cu≤0.50wt%; 0.9wt%≤Cr≤1.3wt%; 0.08wt%≤Sb≤0.12wt%; 0.0010wt%≤B≤0.0020wt%; 0<S≤0.003wt%; 0<P≤0.012wt%; Issues of hardness, plasticity, toughness, wear resistance and corrosion resistance.

The invention discloses a control method for bearing steel bar network carbide and a device for implementing the method. The control method comprises the following steps that the finish rolling temperature of a bearing steel bar with the diameter being phi 20-60 mm is controlled to be 940-1000 DEG C, and the cooling speed of the bearing steel bar is controlled through a double-cooling-area cooling mode after rolling; double cooling areas include the cooling bed quick water cooling area and the cooling bed re-reddening slow cooling area; during the process in the cooling bed quick water cooling area, after rolling, the high-temperature bearing steel bar is fed into the cooling bed quick water cooling area from a cooling bed entry table, and the surface temperature of the bearing steel bar is controlled to be rapidly decreased to 400-450 DEG C through water cooling; during the process in the cooling bed re-reddening slow cooling area, when the temperature of the core part of the bearing steel bar fed into the re-reddening slow cooling area is higher than the surface temperature, heat diffuses from interior to exterior, the bearing steel bar starts to re-redden, the surface temperature is raised to 600-650 DEG C, and then the bearing steel bar is slowly cooled to 150-300 DEG C in the air. The structure grade of the network carbide is controlled within the 1.0 grade.

The invention provides an activated carbon treatment system for improving waste heat utilization rate and denitration rate and a using method thereof. Heat exchangers are separately disposed before flue gas is input into a first-stage adsorption column and a second-stage adsorption column, the temperature of the flue gas entering the first-stage adsorption column and the second-stage adsorption column is controlled, thereby ensuring the temperature of desulfurization and denitration. The activated carbon treatment system utilizes high-temperature flue gas (about 150-170 DEG C) after a main exhaust blower, adopts a mode of heat exchange, artificially controls the temperature of the flue gas entering the first-stage adsorption column and the second-stage adsorption column, and enables the efficiency of removal of SO<2> and NO<x>; and the utilization rate of the high-temperature flue gas after the main exhaust blower is increased, and the temperature of the flue gas entering a desulfurization tower and a denitration tower is controlled to improve the efficiency of desulfurization and denitration.

This application belongs to the technical field of iron and steel metallurgy, and in particular relates to a martensitic wear-resistant steel plate resistant to atmospheric corrosion, including 0.14wt%≤C≤0.22wt%; 0.30wt%≤Si≤0.60wt%; 0.30wt% %≤Mn≤1.00wt%; 0.010wt%≤Ti≤0.020wt%; 0.02wt%≤Nb≤0.04wt%; 0.50wt%≤Ni≤1.0wt%; 0.20wt%≤Cu≤0.50wt%; 3.4wt% %≤Cr≤4.0wt%; 0.0010wt%≤B≤0.0020wt%; 0<S≤0.003wt%; 0<P≤0.012wt%; The corroded martensitic wear-resistant steel plate can take into account the hardness, plasticity, toughness, wear resistance and corrosion resistance of the steel plate.