4results about How to "Solve the emission problem" patented technology

This invention provides a method for collecting gases from the pre-splitting blasting of steeply inclined, extra-thick coal seams, comprising: S1: calculating the blasting parameters for pre-splitting blasting of steeply inclined, extra-thick coal seams and determining the construction location of the blasting holes; S2: combining the blasting parameters, empirical formulas, and theoretical calculations to determine the composition and pressure of the harmful gases generated after the pre-splitting blasting of steeply inclined, extra-thick coal seams, and fixing a gas collection device at the orifice of the blasting hole; S3: selecting an extraction system based on the content of the harmful gases generated after blasting, and discharging the harmful gases collected by the gas collection device through the extraction system; S4: comparing the composition and content of the harmful gases generated after blasting with the gas drawn into the extraction system to verify the extraction effect of the extraction system. The technical solution provided by this invention can solve the problem in existing technologies of not discharging the harmful gases generated after pre-splitting blasting.

This invention relates to a method for purifying water from deep, water-rich tunnels using a construction inclined shaft. The method includes the following steps: preliminary purification of the tunnel surface at the support face, including preliminary purification of the tunnel surface along the slope and against the slope; the installation of multi-stage sedimentation tanks within the main tunnel; the installation of water storage tanks and pumping stations; and further purification of tunnel wastewater in an external sedimentation tank. This method effectively removes tunnel construction wastewater through a preliminary purification system on the surface and through internal and external sedimentation and purification systems, ensuring a good construction environment. It has the advantages of being simple and practical, having good drainage and filtration effects, low pollution control costs, and enabling on-site recycling and reuse of wastewater with good overall performance.

The application discloses a durable non-woven polishing product and a production method thereof, and the durable non-woven polishing product comprises a fiber non-woven fabric substrate and a slurry coated on the fiber non-woven fabric substrate, the slurry comprises hard glue, soft glue, abrasive, filler and auxiliary agent, the glue part is composed of the hard glue and the soft glue, and the glue part is a water-based glue system, and the elasticity of the product is adjusted by changing the proportion. The slurry system of the durable non-woven polishing product is an environment-friendly compound water-based glue system, the problem that a large amount of organic solvent is used as a diluent in the existing winding roller process to generate a large amount of emissions is solved, the wear resistance of the polishing product is excellent, and meanwhile, the production method shortens the required curing process time to one third of the original time, and the energy consumption is reduced to less than 20% of the original energy consumption.

The application discloses an inlaid biodegradable polyurethane / lignin composite material and a preparation method and application thereof. The preparation method of the inlaid biodegradable polyurethane / lignin composite material comprises the following steps: (1) obtaining NCO-terminated polyurethane prepolymer by taking polycaprolactone, polycarbonate diol and polyisocyanate as raw materials; (2) mixing and stirring lignin with the NCO-terminated polyurethane prepolymer under a solvent-free condition; (3) adding glycerol or 1,4-butanediol into the system to perform a chain extension reaction, so as to obtain a chain-extended product; and (4) vulcanizing the chain-extended product to obtain the inlaid biodegradable polyurethane / lignin composite material. The application provides application of the composite material in preparation of an armored track shock-absorbing block. The polyurethane / lignin composite material prepared by the application has high strength, low compression permanent deformation and biodegradability and the like, and can improve the bearing capacity and durability of the armored track as a whole.