8results about How to "Dilution concentration" patented technology

The application discloses a leakage dangerous chemical product recovery system and recovery method, which comprises a dangerous chemical product collecting box, a Venturi generator, a suction pipe and a high-pressure inert gas cylinder. The high-pressure inert gas cylinder is connected with one end of the Venturi generator. One side of the dangerous chemical product collecting box is provided with a collecting box inlet. The top of the dangerous chemical product collecting box is provided with a collecting box outlet. The Venturi generator is communicated with the collecting box outlet on the top of the dangerous chemical product collecting box through a pipeline. The suction pipe is communicated with the collecting box inlet on one side of the dangerous chemical product collecting box. The high-pressure inert gas entering the Venturi generator can generate negative pressure to suck the leakage dangerous chemical product into the dangerous chemical product collecting box through the suction pipe. The leakage dangerous product recovery device and recovery method can return the mixed gas of the inert gas and the treated dangerous chemical product tail gas to the suction pipe, so that the gas concentration in the dangerous chemical product collecting box is kept below the lower limit of explosion, and explosion in the dangerous chemical product collecting box is prevented.

The invention relates to the technical field of cables, and provides a high-flame-retardant low-voltage power cable which sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside. The sheath layer is prepared from the following raw material components in parts by weight: 85 parts of ethylene-vinyl acetate copolymer, 65-75 parts of polyethylene, 30-40 parts of silicone rubber, 50-60 parts of a flame retardant, 3-5 parts of an activating agent, 2-4 parts of a lubricating agent, 2-4 parts of a vulcanizing agent, 1-3 parts of a vulcanizing aid and 1-3 parts of an antioxidant; the flame retardant is prepared from the following raw material components in parts by weight: 7 to 8 parts of 5-hydroxymethylfurfural, 3 to 4 parts of phenylguanidine carbonate and 40 to 50 parts of ammonium polyphosphate. According to the technical scheme, the problem of insufficient flame retardance of the sheath layer in the prior art is solved.

The utility model discloses a kind of high-concentration hemicellulose wastewater treatment systems, it is related to high-concentration hemicellulose wastewater treatment technical field, including the adjusting pool, fenton reaction pool, fenton sedimentation tank, multistage hydrolysis acidification pool and lifting pool connected in order, the adjusting pool water inlet is connected with high-concentration hemicellulose wastewater pipeline, non-ferrous wastewater pipeline and acidic wastewater pipeline, adjusting pool and fenton reaction pool between being provided with dispensing room, and ferrous sulfate storage tank, hydrogen peroxide storage tank and PAM storage tank are provided in dispensing room, ferrous sulfate storage tank and hydrogen peroxide storage tank are connected with fenton reaction pool water inlet respectively, and PAM storage tank is connected with fenton reaction pool, fenton reaction pool is also connected with alkali tank, the fenton sedimentation tank bottom is provided with sludge pump, and the lifting pool water outlet is connected with polymeric ferric sulfate storage tank. Through pre-fenton system combination multistage anaerobic treatment unit realizes the efficient decomposition of hemicellulose, lignin and other refractory substances, and cooperates subsequent advanced treatment to ensure that effluent COD is stable and up to standard.

The utility model relates to a double-stage electrostatic oil fume treatment unit with fresh air heating and oil stain self-cleaning functions, belonging to the field of high-voltage electrostatic purification of oil fume and the field of fresh air heating. The utility model is to solve the problems of low removal efficiency of oil fume particles caused by the phenomenon of "counter electric field" when high-voltage electrostatic technology purifies oil fume, poor cleaning effect of conventional cleaning measures, high corona voltage, easy air breakdown to form sparks, high risk of fire, and high energy consumption of heating fresh air in winter. The utility model includes an oil fume collecting device, a charging mixing section, a first-stage oil fume treatment section, a second-stage oil fume treatment section, oil fume pipeline components, and fresh air pipeline components. The oil fume collecting device is installed at the inlet end of the oil fume pipeline components. The charging mixing section, the first-stage oil fume treatment section, and the second-stage oil fume treatment section are connected in series in the oil fume pipeline components in the order of the oil fume flow direction. The fresh air pipeline components are installed on the first-stage oil fume treatment section and the second-stage oil fume treatment section. The utility model is used as a device for treating indoor oil fume and preheating indoor fresh air.

The invention provides a method for improving corrosion resistance and crack resistance of an alloy patch on the surface of a low-pressure last-stage blade of a steam turbine based on a nickel-based metal connecting layer, which comprises the following steps of: arranging the nickel-based metal connecting layer between a stainless steel base material and the alloy patch, and connecting the base material and the alloy patch through an instantaneous liquid phase welding process; and then the connecting piece is subjected to diffusion annealing treatment, and the required low-pressure last-stage blade of the steam turbine is obtained. Wherein the alloy patch is made of a modified stellite alloy, and the content of the element B in the stellite alloy is not lower than 0.5 wt%; the nickel-based metal connecting layer is designed in a composite structure and is composed of a first BNi-2 layer, a pure Ni layer and a second BNi-2 layer in sequence. Wherein the pure Ni layer serves as a middle barrier layer, and the first BNi-2 layer and the second BNi-2 layer are separated on the two sides. Through the synergistic effect of material component design and welding process regulation and control, high-quality combination of the alloy patch and the base material is achieved, and meanwhile the microstructure in the stellite alloy is optimized so as to improve corrosion resistance.

The present application relates to the technical field of seawater desalination material preparation, and particularly relates to a double-network hydrogel evaporator for interfacial water evaporation, a preparation method and application, comprising a polyvinyl alcohol first network and a 2-acrylamide-2-methylpropanesulfonic acid second network which penetrate each other, and Ti4O7 photo-thermal absorption material is dispersed in the first network; the evaporator has a macroporous skeleton formed by the first network and a multistage pore composed of nanoscale fibrous and membranous secondary structures derived from the second network on the macroporous skeleton, the mechanical stability is improved through a double-network synergistic enhancement mechanism, the multistage pore structure is used to accelerate water transmission and increase the evaporation interface, so that the evaporator has a high evaporation rate, excellent salt resistance and long-term operation stability, and is more suitable for solar-driven seawater desalination, and solves the problems of weak mechanical strength, poor structural stability and poor environmental adaptability of the hydrogel-based evaporator in the prior art.

The application provides a low-nitrogen burner compatible with blast furnace gas and natural gas, and belongs to the technical field of low-nitrogen combustion of industrial kiln and furnace, and comprises a burner brick, a heat storage component and a natural gas lance; the burner brick is provided with a gas injection port, an air injection port and a natural gas injection port; the gas injection port and the air injection port are arranged at intervals along a first direction; the air injection port and the natural gas injection port are arranged at intervals along a second direction perpendicular to the first direction; the heat storage component is provided with a channel for the combustion-supporting air and the blast furnace gas to flow through, and is used for absorbing the heat of the kiln and furnace to heat the gas; the natural gas lance is communicated with the natural gas injection port. During combustion, the combustion-supporting air, the blast furnace gas and the natural gas are mixed and mixed at a position far away from the burner brick and entrain the kiln flue gas, so that the reaction intensity is reduced. The low-nitrogen burner provided by the application realizes delayed mixing and flue gas entrainment by using heat storage preheating and jet space separation, reduces the emission of thermal NOx, is compatible with blast furnace gas and natural gas, and is stable, efficient and reliable in combustion.

This utility model relates to the field of leather wastewater treatment technology, and more particularly to a device for hydrogen sulfide removal in a biogas stripping anaerobic system. The device includes an anaerobic reaction assembly, a gas hood assembly, a gas-liquid separator, a desulfurization tower, and a blower. The anaerobic reaction assembly includes a reaction tank with a first inlet inserted into its side wall. The gas hood assembly includes a stripping gas collection hood fixed inside the reaction tank. Compared to traditional hydrogen sulfide removal devices in biogas stripping anaerobic systems, this utility model, by incorporating a gas hood assembly and a stripping perforated pipe, allows hydrogen sulfide to be stripped through the perforated pipe and collected by the stripping gas collection hood. The hydrogen sulfide is then lifted to the gas-liquid separator for gas-liquid separation and drying, and finally desulfurized by the desulfurization tower. Activating the blower accelerates the biogas flow rate, allowing the biogas to re-enter the reaction tank, stripping perforated pipe, and stripping gas collection hood, thereby reducing the hydrogen sulfide content inside the reaction tank, reducing inhibition of anaerobic bacteria, and thus improving the efficiency of anaerobic treatment of leather wastewater.