49results about How to "Reduce hazardous waste" patented technology

Embodiments of a vibrational energy harvester are provided. A vibrational energy harvester can include a translator layer sandwiched between two stator layers. The translator layer can include a plate having an array of magnets and two or more piezoelectric patches coupled to a tether beam attached to the plate. The stator layers can have a printed circuit board with multilayer electrical windings situated in a housing. In operation, vibration of the housing can result in bending of the piezoelectric patches coupled to the tether beam. This bending simultaneously results in a relative displacement of the translator, which causes a voltage potential in the piezoelectric patches, and a relative velocity between the translator and the stators, which induces a voltage potential in the stator coils. These voltage potentials generate an AC power, which can be converted to DC power through a rectification circuit incorporating passive and active conversion.

Provided is a purification treatment and pure-salt recovery process for strong-salt wastewater in the coal chemical industry. According to the purification treatment and pure-salt recovery process, a working procedure of absorption treatment is additionally conducted on organic matter macromolecules and heavy metals contained in high-concentration salt water after a wastewater reuse multistage reverse osmosis treatment process is carried out; working procedures of evaporation, freezing and desalination are additionally carried out to achieve the purposes of effective utilization of natural energy and industrial low-grade waste heat resources and effective removal of salt-containing wastewater after the working procedure of absorption treatment; a working procedure of chemical separation is added between the working procedure of absorption treatment and the working procedure of desalination to completely convert sulfate radical ions in the salt-containing wastewater into chloride ions and collect and reuse obtained solid, and a nitrate-rich mother solution subjected to crystallization and desalination is returned to a biochemical treatment stage for denitrification treatment. By means of the purification treatment and pure-salt recovery process, salt contained in the salt-containing wastewater is effectively separated out, meanwhile nitrate is returned for biochemical treatment, and secondary steam condensate is evaporated for recycle, so that the whole process achieves the purposes of zero discharge and effective resource utilization.

The invention discloses a technology and a device for zero-drainage of desulfurization wastewater. The technology comprises the following steps of (1) sending the desulfurization wastewater and alkaline liquid to the top part of a deamination tower, sending an aeration fan into the deamination tower via the bottom part, and enabling the aeration fan to be in reverse contact with the desulfurization wastewater; (2) sending the ammonia-containing air after blowing into a deamination reactor, performing deamination, and sending into a deduster; sequentially sending the wastewater after deamination into an ultrafiltration device and a reverse osmosis device, recycling the fresh water of the reverse osmosis device, and sending the concentrated water into a spray-drying tower; leading the dedusted flue gas by the deduster into the spray-drying tower to exchange heat, enabling the dried crystal particles to fall into an ash hopper, and sending the flue gas after heat exchange into the deamination reactor. The technology has the advantages that the wet type desulfurization wastewater is performed with ammonia-nitrogen removal and recycling, wastewater concentration, spray-drying, evaporating and crystallizing, so as to complete the zero-drainage of the desulfurization wastewater; while the running reliability of the treatment device is improved, the recycling rate of the wastewater isimproved and the cycling utilization of the ammonia-nitrogen is realized, the investment running cost of the device for the zero-drainage of desulfurization wastewater is greatly reduced.

The invention relates to a separation and reuse method of sodium sulfate from high salinity wastewater. Divalent salts and organic matters are separated from monovalent salts by means of nanofiltration membrane characteristics to remove a great amount of organic matters in wastewater, then evaporation concentration and crystallization steps are carried out to obtain a sodium sulfate solid with few impurity. The method has the characteristics of reasonable process, resource recovery, economical efficiency and high efficiency, and stable operation, can be used as an advanced treatment technology to effectively remove organic matter and inorganic salt based total dissolved solids (TDS) from high salinity wastewater, at the same time acquires the sodium sulfate solid with few impurity, can well make up for the shortcomings of existing high salinity wastewater treatment technology, and makes the high salinity concentrated solution treatment reach the purpose of "zero emission of solid and liquid".

The invention discloses a telescopic filter element, and a filter with a replaceable filter element. The telescopic filter element comprises a wave-shaped filter part, first edge sealing strips and second edge sealing strips are arranged on the periphery of the wave-shaped filter part, the first edge sealing strips are arranged on the two sides of the folded edge of the filter part, the second edge sealing strips are arranged on the two sides of the multi-folded edge of the filter part, and fixing pieces are further arranged on the two sides of the multi-folded edge; and the filter with the replaceable filter element comprises the filter element and a frame, the frame is formed by splicing a first frame piece and a second frame piece, the whole frame piece is of an L-shaped structure, the upper edge of the top end of the long side of the frame piece is arranged to be an inclined face, an inclined protruding strip, a hollow reinforcing rib and a protective net baffle are sequentially arranged on the inner side of the long side from top to bottom, a surface protecting net is installed between the protective net baffle and the L-shaped short edge, and the filter element is installed in the upper space of the surface protecting net. The frame body and the filter element can be separated, the frame can be reused, the filter element can be replaced regularly, and energy conservation and consumption reduction are achieved; and the filter element is telescopic and is convenient to transport and store after being compressed.

The invention relates to an advanced treatment system and method for leather wastewater containing heavy metals, dyes and short wool fibers. The method comprises the following steps: firstly, deeply removing the short wool fibers and other impurity solid particles in the leather wastewater by using a particle bed separator; then adding a decolorizing agent to decompose dye molecules in the wastewater; then, removing solid particles generated by a decoloration reaction by using a deep interception filtering tower; and finally, carrying out in-depth removal of heavy metal chromium ions, dye molecules and fragments thereof in the wastewater by using a dual-functional adsorption tower so as to allow effluent to meet reuse requirements or related discharge standards and greatly reduce the discharge amount of chromium-containing hazardous wastes. The treatment method and system can realize synchronous deep removal of heavy metals, dyes and fibers in wastewater produced in the industries of leather, textile, printing and dyeing, papermaking and the like, effluent quality meets reuse requirements, and the effluent reaches relevant national and local discharge standards in China.

The invention provides a preparation method of a phthalate plasticizer. The method specifically comprises the steps of esterification, crude dealcoholization, cooling, addition of a deacidifying agent, dealcoholization and filtration. The preparation method is adopted; treatment is carried out without a decolorizing agent, the chromaticity of the prepared phthalate plasticizer product can reach 10-15 # through platinum-cobalt standard colorimetry; phthalic anhydride and sec-octyl alcohol are used as raw materials; the acid value of the dioctyl phthalate prepared by the preparation method disclosed by the invention is less than or equal to 0.05 mgKOH/g; wherein the water content is less than or equal to 0.05%, the alcohol content is more than or equal to 99.5% and the alcohol content is less than or equal to 0.005%, and meanwhile, neutralizing and washing steps can be reduced, the wastewater amount is reduced, the alkali washing, washing and settling time is saved, the production cost is greatly reduced and the production benefit is increased.

The invention provides a method for predicting the residual life of an in-service denitration catalyst based on actual operating conditions. The method includes sampling and detecting the in-service denitration catalyst to measure the current activity K1 of the in-service denitration catalyst; collecting data such as average flue gas flow rate V, average coal consumption mass M, initial activity K0 of the denitration catalyst, the current in-service time T1 of the denitration catalyst and the like of the unit in a coal-fired power plant, substituting the collected and detected data into a formula to calculate a correction coefficient lambda to obtain an in-service denitration catalyst deactivation graph; and predicting the residual life ts of the in-service denitration catalyst according to the catalyst activity threshold Ky provided by a manufacturer when the denitration catalyst is initially mounted, and calculating the residual life ts of the in-service catalyst. The method realizesthe prediction of the residual life of the in-service denitration catalyst, provides a guarantee for the power plant to replace the deactivated catalyst in time at a catalyst failure point, so that the waste of catalyst potential is avoided, and the generation of solid hazardous waste is reduced.

The invention discloses an oil-water separation filter. The oil-water separation filter comprises a liquid inlet, a filter end cover and a filter main shell, wherein the filter end cover is connectedwith the filter main shell; a spiral extrusion structure is arranged in the filter main shell and comprises a fixed plate, a filling material net bag and a movable plate; the filling material net bagis respectively connected with the fixed plate and the movable plate; the other end of the movable plate is connected with a rotating rod which is connected with a motor through an oil seal; and the motor rotates the rotating rod to drive the filling material net bag to rotate and extrude. According to the invention, through arrangement of the spiral extrusion structure in the oil-water separationfilter, automatic extrusion oil discharge of a filling material in the spiral extrusion structure is realized; the service life of the filling material is prolonged; meanwhile, the replacement frequency is reduced; and the cost is reduced.

The invention relates to a preparation method of a CSF-IR inhibitor. According to the invention, a compound I is used as a raw material, reaction conditions are further optimized according to the characteristics of reactants and intermediate products, side reactions are reduced, post-treatment difficulty can be reduced, post-treatment experimental operation steps are reduced, the defects of long route (eight steps), low yield and poor atom economy in the prior art are overcome, and the target product can be prepared by using easily available and cheap starting raw materials. The synthesis method is mild in reaction condition, simple and convenient to operate, suitable for small-amount preparation in a laboratory and suitable for industrial large-scale production.

Compared with the prior art, the system for comprehensively recovering the precious metal from the high-sulfur nickel anode slime comprises rotary roasting equipment used for roasting the high-sulfur nickel anode slime; the flue gas treatment system is connected with the rotary roasting equipment and is used for treating desulfurized flue gas; the sodium sulfite preparation device is connected with the flue gas treatment system; the desulfurization residue acid leaching system is connected with the roasted product; the noble metal slag storage chamber is connected with the sodium sulfite preparation device and the desulfurization slag acid leaching system; the gold leaching system is connected with the precious metal slag storage chamber; the palladium-platinum adsorption system is connected with the gold leaching system; the analysis system is connected with the palladium-platinum adsorption system; and the first refining system is connected with the analysis system. According to the technical scheme, compared with the prior art, the production process is short, operability is high, and the recovery rate of precious metal can be increased. The invention further relates to a method for comprehensively recovering the precious metal from the high-sulfur nickel anode slime, and the method also has the above beneficial effects.

The invention discloses a one-pot production process of methyl isopropyl ketone, and relates to the field of chemical synthesis. The process comprises the following steps: adding a certain amount of butanone, palladium on carbon and a basic catalyst into a hydrogenation reaction kettle, after nitrogen and hydrogen are replaced until no air is left in the reaction kettle, increasing the pressure in the reaction kettle to a certain pressure by using hydrogen, and heating the materials in the reaction kettle to a temperature required by reaction; starting the reaction kettle for stirring, adding the formaldehyde aqueous solution into the hydrogenation reaction kettle, and controlling the reaction temperature and the reaction pressure at the same time; the addition time of the formaldehyde is controlled within 1-10 hours; and after the reaction is finished, pressing out the materials in the reaction kettle, layering, rectifying an organic layer, obtaining a finished product, and packaging. The method has the beneficial effects that the process flow can be shortened, the energy consumption and the equipment investment are reduced, and the wastewater amount is reduced; the reaction yield is improved, and safety and controllability are realized.

The invention belongs to the technical field of spraying, and specifically discloses an anti-sticking paint as well as a preparation method and application thereof. The anti-sticking paint is preparedfrom the following raw materials in percentage by mass: 40-60% of polyethylene wax emulsion; 25-35% of polyurethane dispersion; 1-3% of color paste; 2-10% of a coalescing agent, 0-1% of an antifoaming agent, 0-1% of a leveling agent, 0-1% of a dispersant and 0-2% of a thickener. Ethylene wax particles can float on the surface of a coating after the anti-sticking paint is sprayed on a hanger to form a film, and due to low surface tension of wax, the surface of the coating is difficult to adhere, the adhesion force of paints on the surface is weak, and thus the paints can be easily removed.