5results about How to "Improve pulping" patented technology

The invention belongs to the technical field of precious metal electronic paste, and particularly relates to a preparation method and application of submicron spherical gold-platinum-palladium alloy powder used for being matched with low-temperature co-fired ceramics. The preparation method comprises the following steps: mixing a tetrachloroauric acid solution, a hexachloroplatinic acid solution and a tetrachloropalladium (II) acid solution to obtain a gold-platinum-palladium mixed solution; the gold-platinum-palladium mixed solution, the dispersing agent solution and the modified reducing agent solution are mixed for a second time, after a reduction reaction is conducted, static settlement and solid-liquid separation are conducted in sequence, obtained solids are washed and dried in sequence, and the obtained submicron spherical gold-platinum-palladium alloy powder used for being matched with the low-temperature co-fired ceramic has the advantages of being uniform in particle size, free of agglomeration, high in dispersity and the like. After low-temperature co-firing with a ceramic substrate, the substrate has the characteristics of flatness, no bubble, excellent weldability and soldering resistance, good batch stability and the like.

The application discloses a kind of hydrophobic modified low rank coal and its preparation method and application, belong to surface modification technical field, preparation method includes the following steps: low rank coal, 4-vinyl benzoic acid, catalyst and DMF are added to three-necked flask, uniformly mixed, stirring is reacted for a certain time under certain temperature, washes with DMF and distilled water, drying, and intermediate product I is obtained;Intermediate product I, hydrophobic modifier and DMF are added to three-necked flask, uniformly mixed, initiator is added, ultrasonic 1h, stirring is reacted for a certain time under certain temperature, washes with DMF and distilled water, drying, and obtain hydrophobic modified low rank coal.Compared with other surface modification methods, hydrophobic chain is firmly combined on the surface of low rank coal and will not fall off.The coalification degree of low rank coal after hydrophobic modification is improved, which is beneficial to improve the slurry performance of modified low rank coal.

A supercritical water gasification system with energy recovery and zero wastewater discharge includes: a supercritical water gasification hydrogen production unit, including a quality-improving slurry tank, a high-pressure delivery pump, a slurry preheater and an internal heat type gasification reactor; a gas separation unit, including a thermostat, a pressure regulator and a high-pressure gas separator; a waste treatment unit, including a high-pressure gas separator, a waste booster pump, a supplementary heat device and a supercritical water oxidation reactor; a residual energy recycling unit, including a supercritical water oxidation reactor, a regenerator, a pressure energy recovery device, a pressure regulator, a high-pressure three-phase separator and a flow distributor. The present invention can improve the slurrying rate of coal and thus increase its gasification rate and hydrogen production rate, while making full use of the remaining heat energy, pressure energy and water resources of the system, reducing the energy consumption and operating cost of the system, improving the economy of the system, achieving zero pollutant discharge, and contributing to the promotion and application of supercritical water gasification hydrogen production technology.

The invention discloses aggregate interface reinforced high-performance concrete, which is prepared from the following ingredients in parts by weight: 300 to 400 parts of cement, 50 to 100 parts of coal ash, 50 to 100 parts of slag powder, 600 to 800 parts of fine aggregate, 1000 to 1200 parts of pretreated coarse aggregate, 5 to 10 parts of water reducing agents, 150 to 180 parts of water and 10 to 20 parts of aggregate interface reinforcing agents. The aggregate interface enhancer comprises a silane coupling agent, nano silicon dioxide, ethanol and water; the aggregate interface enhancer comprises the following components in parts by weight: 3-5 parts of a silane coupling agent, 3-5 parts of nano silicon dioxide, 10-15 parts of ethanol and 5-10 parts of water; the pretreated coarse aggregate is 5-25mm continuous graded broken stone, the surface of the pretreated coarse aggregate contains an aggregate interface enhancer, and the silt content of the pretreated coarse aggregate is not more than 1.0%. By pretreating the surface of the coarse aggregate and optimizing the mixing ratio of the concrete, the interface bonding strength between the aggregate and the cement paste is remarkably improved, the mechanical property and durability of the concrete are improved, and the preparation quality of the concrete is improved.

The utility model relates to a production system of biomass coal water slurry. The system at least comprises a biomass liquefying unit for liquefying biomass; a lignin modification unit for modifying the liquefied biomass in the biomass liquefaction unit; the lignin modification unit, the coal grinding water pipeline and the feed coal storage bin are respectively connected with the coal mill, and the coal mill is connected with the gasification furnace for combustion; the method has the characteristics of reducing the consumption of feed coal, lowering the production cost, reducing the emission of oxides and improving the utilization efficiency of biomass.