41results about How to "Short investment" patented technology

The present invention relates to a fall protection device used in the process of climbing steel tower of power transmission line. Said full protection device includes the following several portions: large hanger, small hanger, endless rope, delta wire-lock fastener, pear-shaped fastener, small tackle and safety hook. Said invention also provides a fall protection method by using said fall protection device and its concrete operation steps.

An instant donkey-hide gelatin in the form of particles is prepared from donkey-hide gelatin through pulverizing, granulating and baking.

The invention provides a process for recycling copper through electrodeposition by treating scrap copper materials by adopting a cyclone electrolysis technology, belonging to the technical field of recycling copper from wastes containing copper. The process is characterized by taking various purchased wastes containing copper as raw materials, preliminarily screening and grinding the wastes, adding the materials to a dissolved copper leaching bath device to undergo continuous copper dissolving to obtain a copper sulfate solution, then filtering the solution with precision filter equipment, decoppering the obtained filtrate through cyclone electrolysis, scalding an obtained copper pipe with weak acid and then feeding the copper pipe into a product processing unit to process a standard copper plate. The process has the following beneficial effects: through portable or module assembly, the cyclone electrolysis bath and support equipment are convenient to install, dismantle and move; the solution circulates in a closed loop, thus avoiding emission of harmful gases; electrolytic deposition is carried out on the metals selectively and the copper can be better purified by applying the cyclone electrolysis technology; higher current density and current efficiency are ensured, fewer reagents are consumed, the production cost is lowered and the enterprise revenue is improved; and high efficiency and high purity electrolytic extraction is carried out on the solution, the recycled copper is the standard cathode copper and the total recycling rate is above 96%.

The invention discloses an offshore LNG receiving system and method. The system comprises a full-cooling type LNG transport ship, an LNG receiving device, an LNG pressurizing gasification system, a natural gas cooling system, a cold-insulation circulating system and a ship-shore connecting system. The floating type or gravity base type offshore LNG receiving system is constructed at an offshore position to rewarm imported liquefied natural gas, the liquefied natural gas is conveyed to a natural gas trunk line through a single-point mooring device and a submarine pipeline to be received at the offshore position, and therefore the problem that the address of a dock for an LNG receiving station is difficult to select is solved. A shore-based LNG receiving and gasifying function is changed to be achieved at the offshore position, and therefore occupied port shoreline resources are reduced. Compared with a traditional dock loading technology, the offshore LNG receiving system is quite suitable for regions lacking natural ports and the condition that a port plan is difficult to change, the technology is simple, investment is low, the construction period is short, and if market changes, equipment can be transferred to other regions for continuous service.

The invention discloses a preparation method of nanometer WC-Co composite powder. In the formula, soluble carbon source is directly added, carbon content is accurately controlled by regulating the hydrogen-carbon ratio of mixed gas in the carbonization and carbon regulation procedures. The specific steps are as follows: (1) according to the main ingredients of the WC-Co composite powder, calculating and weighing tungsten salt, cobalt salt and carbon source, dissolving the ingredients in water, evenly stirring, and preparing precursor solution; (2) preparing precursor pre-composite powder by spraying and drying mixed solution; (3) under the protection of neutral atmosphere, roasting the prepared precursor pre-composite powder to prepare original composite powder; (4) under the protection of hydrogen-carbon mixed gas, further carbonizing and regulating carbon for original composite powder at high temperature to prepare the nanometer WC-Co composite powder. The carbon element of the composite powder of the method has reasonable addition mode, easily precise control of carbon content, even chemical component, simple manufacturing technology and easy realization of industrial production.

The invention discloses a technology for treating high-concentration and high-chromaticity wastewater. The technology realizes wastewater treatment by the following steps: treating by a two-stage anaerobic tank, a water distribution tank, a filter tank and a one-to-three-stage aerobic biological tank; disinfecting in a clear water tank; and recycling the water reaching the standard in the water distribution tank. The treatment technology is suitable for treating various types of high-concentration and high-chromaticity wastewater, such as garbage percolate, dye mother liquor, dyeing and finishing wastewater, cane mill alcohol waste mash, DDNP (diazodinitrophenol) waste liquor, soy sauce water, traditional Chinese medicine wastewater, electrophoretic paint wastewater and the like. According to the technology, various types of high-concentration and high-chromaticity wastewater can reach the nationally specified discharge standard after treatment. In addition, the complicated high-concentration and high-chromaticity wastewater treatment is simplified, thereby greatly lowering the cost for treating the type of wastewater.

The invention relates to a chemical dust suppressing agent for mines. The chemical dust suppressing agent is characterized by being prepared from the following raw materials in parts by weight: 15 to 25 parts of alkylphenol ethoxylate, 15 to 25 parts of alpha-olefin sulfonate, 15 to 25 parts of alkyl amide propyl betaine, 3 to 10 parts of tetra-polylysine, 0.5 to 1 part of water glass, 0.5 to 1 part of calcium chloride, 0.5 to 1 part of compound of calcium lactate and calcium gluconate, 2 to 8 parts of epoxy resin, 0.05 to 0.1 part of 2-methyl sodium isocitrate, 1 to 5 parts of 1,2-propanediol and 100 parts of water. The chemical dust suppressing agent has the advantages that a surfactant and a complexing product are poisonless, and can be easily dissolved into water; the obtaining is easy, the cost is low and economical, and the surface tension is lower; a produced foam film has certain viscosity and elasticity, and the secondary pollution can be avoided.

The invention discloses a method for separating and recovering silver and palladium from silver-palladium alloy scrap. The comprises the following steps of dissolving and leaching high-silver low-palladium alloy scrap by using nitric acid; conducting selective palladium precipitation on the leachate by adding a first palladium precipitation agent, and filtering to obtain silver-rich filtrate and palladium-rich salt; preparing high-purity silver powder from the silver-rich filtrate by adopting a reduction method; and after palladium-rich salt oxidation acid leaching, adding a second palladium precipitation agent for further purification and recovery. By adopting the recovery method to recover palladium, the problem of entrainment loss of precious metal ions caused by a traditional chlorination precipitation method is optimized, the tedious step of repeatedly washing silver chloride precipitates to recover the precious metal ions is avoided, the recovery process of the palladium is greatly shortened, the recovery rate and purity of the palladium are remarkably improved, meanwhile, the influence of the palladium on recovery of the high-purity silver powder is avoided, the energy consumption can be effectively reduced, the difficulty in wastewater treatment is reduced, and the method is environment-friendly.

A composite diatomite coagulant with both coagulating and flocculating actions for treating the osmotic garbage sewage is prepared from the diatomite containing alumina (10-30%) or the diatomite plus the alumina leftover or bauxite through pulverizing and heating to 450-550 deg.C for dewatering.