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704results about How to "Reduce evaporation rate" patented technology

Fermenting and drying treatment device for organic wastes

The invention discloses a fermenting and drying treatment device capable of reliably and effectively fermenting and drying organic wastes with simple structure for avoiding cost increment. The device is provided with an airtight container, a hollow cylindrical rotating shaft rotating freely and vertically arranged in the container, a plurality of stirring blades extending to the horizontal direction from multiple upper and lower positions of the rotating shaft, a driving mechanism for driving the rotating shaft to rotate, an air supply mechanism for supplying air to the container, and an exhaust port for exhausting the air in the container. The plurality of stirring blades comprises stirring blades which have hollow interiors and are provided with through holes communicating the outside from the hollow space, the air supply mechanism is connected at the axial end of the rotating shaft, and the hollow space of the rotating shaft is mutually communicated with the hollow space of the stirring blades. Therefore, the air supplied by using the air supply mechanism is exhausted from the through holes of the stirring blades through the rotating shaft. The organic wastes are put into the container, the air is introduced into the container, the organic wastes are stirred, and the organic wastes are subjected to fermenting treatment and drying treatment based on the action of aerobic microbes.
Owner:CHUBU ECOTEC

Efficient nitrogen injection and fire extinguishing system for mining

The invention discloses an efficient nitrogen injection and fire extinguishing system for mining. The efficient nitrogen injection and fire extinguishing system comprises a refrigerating machine; an inlet and a liquid inlet of the refrigerating machine are communicated with the lower end of a three-way valve; an outlet of the refrigerating machine is connected with a liquid inlet of an atomizing nozzle through an inhibition liquid pipe; an inlet of the three-way valve is communicated with a gas inlet; an outlet of the three-way valve is communicated with a gas inlet of the atomizing nozzle through a nitrogen injection pipe; a gas pressure adjusting valve, a gas flow meter and a gas pressure meter are connected on the nitrogen pipe; the atomizing nozzle is connected with the back end of the nitrogen injection pipe, and can directly use the conventional nitrogen pipeline and the water transmission pipeline of a mining well. The efficient nitrogen injection and fire extinguishing system has a small occupied space, can be flexibly moved, and is simple in operation. The efficient nitrogen injection and fire extinguishing system can continuously work, and has multiple effects of cooling, inerting, inhibiting and atomizing. The efficient nitrogen injection and fire extinguishing system can be used for efficiently transporting low-temperature atomized nitrogen to a deep part of a fire extinguishing area, so that the technical problems that the nitrogen is easy to diffuse along with wind at a room temperature, the cooling effect is limited, and the fire extinguishing period is long can be solved. The efficient nitrogen injection and fire extinguishing system has wide practical applicability, and is applicable to underground fire extinguishing of a coal mine.
Owner:CHINA UNIV OF MINING & TECH

Reduced-type polycarboxylic acid water reducer and preparation method thereof

InactiveCN108164653AReduce surface tensionGood water reductionCarboxylic acidWater reducer
The invention relates to a reduced-type polycarboxylic acid water reducer and a preparation method thereof. An esterification method is employed for synthesizing a reduced monomer having a low surfacetension, and the reduced polycarboxylic acid water reducer is prepared through polymerization; acid anhydride or unsaturated carboxylic acid and ethers molecules are subjected to an esterification reaction to prepare the reduced monomer under effect of a catalyst, and then the reduced monomer, nonsaturated polyoxyethylene ether, unsaturated carboxylic acid or a mixture of unsaturated carboxylic acid or its acid anhydride, and a molecular weight conditioning agent are subjected to a free radical copolymerization reaction under effect of an initiator. The method has the advantages of easy control, high yield, low cost, environmental protection, and no pollution. During a polymerization process, a reduced group is introduced, so that the water reducer has low surface tension, an anchoring group is introduced, has good cement slurry-cleaning fluidity under common doping, reduces the surface tension force of a cement aperture solution, and reduces evaporation rate of the solution so as toeffectively reduce the mortar contraction. The obtained water reducer presents good water-reducing and reduction characteristic.
Owner:BEIJING UNIV OF TECH

Preparation method of high-safety lithium ion battery diaphragm and preparation of total battery

The invention discloses a preparation method of a high-safety lithium ion battery diaphragm and a preparation scheme of a total battery. According to the preparation method, a novel polyaryletherketone high polymer material with an active reaction group is prepared, and then the material is prepared into non-woven fabric through an electrospinning technique to be used as a polymer framework, so that the mechanical performance and heat resistance of the diaphragm are improved; through photo initiation or thermal initiation curing, a flexible side chain structure is introduced to the rigid polymer framework, so that electrolyte absorption capability and lithium ion conduction capability of the diaphragm are improved; and a diaphragm curing reaction is performed on a metal lithium sheet or agraphite negative electrode, so that the contact surface between the diaphragm and the metal lithium surface can be enlarged, and formation of lithium dendritic crystal is suppressed and decelerated.The whole battery preparation scheme provided by the invention has the characteristics of no expansion at a temperature of 80 DEG C and high cycle stability (0.5C and 200 cycles), and is expected to be the improved scheme of the high-safety lithium ion battery diaphragm to be applied to a lithium ion secondary battery or a lithium metal secondary battery.
Owner:PEKING UNIV

Cleaning system utilizing an organic cleaning solvent and a pressurized fluid solvent

A cleaning system that utilizes an organic cleaning solvent and pressurized fluid solvent is disclosed. The system has no conventional evaporative hot air drying cycle. Instead, the system utilizes the solubility of the organic solvent in pressurized fluid solvent as well as the physical properties of pressurized fluid solvent. After an organic solvent cleaning cycle, the solvent is extracted from the textiles at high speed in a rotating drum in the same way conventional solvents are extracted from textiles in conventional evaporative hot air dry cleaning machines. Instead of proceeding to a conventional drying cycle, the extracted textiles are then immersed in pressurized fluid solvent to extract the residual organic solvent from the textiles. This is possible because the organic solvent is soluble in pressurized fluid solvent. After the textiles are immersed in pressurized fluid solvent, pressurized fluid solvent is pumped from the drum. Finally, the drum is de-pressurized to atmospheric pressure to evaporate any remaining pressurized fluid solvent, yielding clean, solvent free textiles. The organic solvent is preferably selected from terpenes, halohydrocarbons, certain glycol ethers, polyols, ethers, esters of glycol ethers, esters of fatty acids and other long chain carboxylic acids, fatty alcohols and other long-chain alcohols, short-chain alcohols, polar aprotic solvents, siloxanes, hydrofluoroethers, dibasic esters, and aliphatic hydrocarbons solvents or similar solvents or mixtures of such solvents and the pressurized fluid solvent is preferably densified carbon dioxide.
Owner:EMINENT TECHNOLOGY
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