6results about How to "Eliminate emissions" patented technology

The invention belongs to the technical field of aeronautical materials, and particularly relates to a PEI modified material containing a high-temperature composite dispersion system as well as a preparation method and application of the PEI modified material. The PEI modified material containing the high-temperature composite dispersion system provided by the invention is prepared from the following raw materials: polyetherimide resin, titanium dioxide, carbon black and dispersing agents (a coupling agent and polyamide wax). The PEI modified material containing the high-temperature composite dispersion system provided by the invention can realize efficient and uniform dispersion and color regulation and control of pigments in a high-viscosity and strong-polarity system, and has excellent heat resistance, mechanical property and flame retardant property, and interior structural parts prepared from the PEI modified material meet the comprehensive requirements on light weight, attractiveness and durability in the aviation field.

The application discloses a high-performance aluminum nitride ceramic rapid sintering method and belongs to the technical field of ceramic materials, and comprises the following steps: preparing ceramic raw materials according to a formula: uniformly mixing high-purity aluminum nitride powder, a sintering aid, a hydrolysis-resistant agent and a solvent, and drying under a nitrogen atmosphere; the ratio of the high-purity aluminum nitride powder, the sintering aid and the hydrolysis-resistant agent is 1:1%-3%:0.5%-1.5%; primary sintering of the ceramic: heat-press sintering the uniformly mixed aluminum nitride powder under a neutral or reducing atmosphere at 1650-1850 DEG C and a pressure of 20-30 MPa for 10-60 min, so that the density of the aluminum nitride powder reaches more than 99%; secondary sintering of the ceramic: sintering the primary-sintered aluminum nitride ceramic under a reducing atmosphere at 1850-2000 DEG C under normal pressure for 1-6 h. The prepared aluminum nitride ceramic not only has high heat conduction performance, but also has high sintering efficiency; meanwhile, the problem of waste gas generated in the degreasing process is avoided, and the environment is protected.

The utility model relates to a zero carbon heat supply system based on green electricity and power grid cooperation belongs to the field of energy -conserving and environment -protecting technology, sewage heat exchanger provides heat source for electric compression type heat pump evaporation side, electric compression type heat pump condensing side is provided with the medium outlet pipeline and the medium inlet pipeline of heating to be waited for, electric compression type heat pump compressor and green electricity system electricity is connected. Through the collaborative design of the heat storage unit and the liquid return storage unit, the day and night heat supply load is effectively balanced. During the daytime working condition, the heat storage unit stores the excess heat generated by the heat pump, and the heat storage is controlled through the first valve and the night heat supply circulating pump. When the green electricity supply is insufficient at night, the heat storage unit releases heat, and the liquid return storage unit collects low-temperature liquid return to maintain medium circulation. At the same time, the inverter is connected to the power grid to realize "off-grid / grid-connected" dual mode, and the power storage unit ensures power stability.

This invention discloses a UV-curable solvent-free hot-press adhesive and its preparation method, belonging to the field of polymer materials. The UV-curable solvent-free hot-press adhesive contains 9 components by weight, including 5-10 parts of liquid polybutadiene and 10-20 parts of polyurethane acrylate oligomer. In the preparation process, some raw materials are first mixed, ester-soluble TPU is added for dissolution, a photoinitiator is added in the dark, and end-capping isocyanate is added after cooling. The application requires three steps: coating, UV curing (wavelength 365-405nm, light intensity 150mJ / cm²), and hot-pressing (120-140℃). Compared with traditional hot-press adhesives, it has no VOC emissions, high production efficiency, low energy consumption, and excellent adhesion performance (peel force 17.3-33.5N / 25mm).

The application relates to the technical field of agricultural machinery, and discloses a pure-electric double-spiral fertilizing, furrowing and soil covering integrated machine, which comprises a rack provided with an electrically-driven walking track at the bottom; a power battery pack for providing pure electric power for the walking and operation of the whole machine; a middle low-position feeding system comprising a fertilizer box installed at the middle part of the rack, a material collecting groove arranged below the fertilizer box and a bucket elevator; a position adjusting module comprising a lifting module and a horizontal moving module; and a front furrowing and fertilizing operation head comprising two hollow spiral furrowing devices which are symmetrically arranged left and right; and each spiral furrowing device is provided with a fertilizer discharging auger in a concentric mode. The application has a higher anti-tilting capacity than a conventional front high-position fertilizer box fertilizing machine, and eliminates the safety hidden danger of easy tilting; the spiral furrowing, spiral fertilizer discharging and soil covering actions are realized on a walking track; and the walking and operation of the whole machine completely rely on the pure electric power provided by the power battery pack.

This invention belongs to the field of chemical synthesis technology, specifically relating to a method for preparing 2-methyl-1H-phenylenehydride. The method includes the following steps: using acetic acid and 1,8-diaminonaphthalene in a molar ratio of 2.5~5.5:1 as reactants, and water as the reaction medium, at 100℃~185℃, one amino group of 1,8-diaminonaphthalene undergoes a condensation reaction with the carboxyl group of acetic acid, removing one water molecule to obtain a product intermediate containing an amide bond. The other amino group on the intermediate undergoes an intramolecular cyclization reaction with the carbonyl group in the amide bond, removing one water molecule to obtain a crude product. The crude product is then purified to obtain the 2-methyl-1H-phenylenehydride. The 2-methyl-1H-phenylenehydride prepared using the method of this invention can achieve a purity of up to 98%.