Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

54results about How to "Less emissions" patented technology

Method and device for extracting lithium from lapidolite by chloridizing roasting method

ActiveCN101775505ALow melting pointReduce or inhibit precipitationRubidiumPotassium
The invention discloses a method and a device for extracting lithium, which is used for preparing lithium carbonate, from a lapidolite ore by a chloridizing roasting method. The method comprises the following steps of: firstly, mixing the lapidolite ore, calcium chloride and sodium hydroxide with a compound bonding agent for pellet fabrication; secondly, performing chloridizing roasting in a square-frame shaped track type roasting furnace; thirdly, leaching out soot dust by using solution containing sodium carbonate and potassium carbonate to ensure that potassium, sodium, rubidium and cesium enter the solution and convert the lithium into lithium carbonate; fourthly, filtering the mixture to obtain a lithium carbonate solid, and circularly using the filtrated mother liquor to leach out the soot dust; fifthly, when an alkali metal salt is close to be saturated, indirectly heating the filtrated mother liquor by using the residual heat of the gas in the roasting furnace to evaporate part of water; sixthly, passing CO2 into the filtrated mother liquor to perform carbonation; and seventhly, performing cooling crystallization to separate out a mixed salt of the sodium carbonate and the potassium carbonate, returning part of the mixed salt which is used as an auxiliary material mixed and roasted with lapidolite for cyclic utilization, using another part of the mixed salt as a carbonate reagent needed in dissolution, and using the rest part of the mixed salt as byproducts of the sodium carbonate and the potassium carbonate. The method has the advantages of high lithium recovery rate, good material comprehensive utilization, large equipment productivity, high production efficiency, small water consumption in the process and less wastewater discharge.
Owner:CENT SOUTH UNIV

High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method

ActiveCN102337369AGood for high pressure operationGood for material level controlShaft furnaceMetallurgyCogeneration
The invention discloses a high-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and a method, which belong to the technical field of melting reduction. The device comprises a raw material system, a furnace top material charging and distributing system, a melting reduction furnace, a furnace top high-temperature gas system, a prereduction furnace, a semicoke gas recycling system, a coal dust preparing and spraying system, a molten iron desulfurizing agent preparing and jetting device, an oxygen and nitrogen supplying system, a residual iron treating system, a high-wind-temperature hot blast furnace, a melting reduction furnace blower, a furnace top gas dedusting and recycling system and a gas cogeneration device. The method comprises the following steps of: introducing high-temperature gas which is generated in a high-wind-temperature rotational flow injection disturbance melting reduction furnace into the prereduction furnace; directly reducing an iron-containing raw material in a solid phase state into a prereduction furnace material with a certain metallization rate; cooling, and then adding the cooled material and semicoke which serve as the furnace material and a fuel respectively into the melting reduction furnace; and finally producing molten iron by reduction. The device and the method have the advantages of high production efficiency and low energy consumption, are easy to operate and make industrialization easily realized.
Owner:BEIJING SHOUGANG INT ENG TECH

Self-drying aqueous alkyd resin solution and preparation method thereof

The invention relates to self-drying aqueous alkyd resin solution and a preparation method thereof. According to a formula, the solution comprises the following raw materials in part by weight: 15 to 25 parts of terephthalic acid, 5 to 35 parts of monoacid, 30 to 40 parts of polyatomic alcohol, 10 to 45 parts of rosin, 0.1 to 0.3 part of color reducer, 10 to 15 parts of maleic anhydride and 6 to 15 parts of cosolvent. The preparation method comprises the following steps of: mixing the terephthalic acid, the monoacid, the polyatomic alcohol, the rosin and the color reducer; preserving the heat at the temperature of between 210 and 230 DEG C for 1 to 3 hours to distill off esterified water; cooling the solution to 130 to 150 DEG C, adding the maleic anhydride into the solution and raising the temperature for reaction until the temperature is raised to 210 to 230 DEG C; and reducing the temperature to 110 to 130 DEG C, adding the cosolvent into the solution, continuously reducing the temperature, adding a neutralizing agent into the solution, adjusting the pH value and adding de-ionized water into the solution to obtain the product. By using water as a diluting agent, the solution has the advantages of less using amount and discharge of an organic solvent, readily available raw materials and simple process; and a coating has the advantages of high glossiness, superior water resistance, superior weather resistance, and adhesion and drying property equivalent to those of a solvent-based coating.
Owner:SHANGHAI LIANSHENG CHEM

Crushed coal pressurized gasification gas-water separation and recycling system and method

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator, an ammonia distillation tower and other devices and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline in a sealed mode, and the whole system and the separation and recycling process keep micro-positive-pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The coal gas water tank is connected with a second ammonia distillation tower, so that coal gas water going to biochemical treatment equipment can be completely or partially subjected to ammonia distillation through the ammonia distillation tower, and the problem that a biochemical system is difficult to operate stably due to change of different feed coals is solved.
Owner:SEDIN ENG

Crushed coal pressurized gasification gas-water separation and recycling system and method

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator, an ammonia distillation tower and the like and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline, and the whole system and the separation and recycling process keep micro-positive pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The coal gas water treated by a deacidification tower is fed into the ammonia distillation tower, so that the coal gas water going to the biochemical treatment equipment can be subjected to ammoniadistillation, the ammonia content in the coal gas water going to the biochemical treatment equipment can be reduced, and the problem that a biochemical system is difficult to operate stably due to change of different feed coals is solved.
Owner:SEDIN ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products