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62 results about "Partial solution" patented technology

The partial solutions are associated with the nodes of the branching tree that are not leaves (as Samuel reminded me, except for the nodes that became leaves by pruning, these are partial solutions too). For example, if you're optimizing a function over a subset of R^4, an example of a partial solution would be (1,x2,2,x4),...

NMR CryoMAS Probe for High-field Wide-bore Magnets

An MAS probe is disclosed for obtaining a substantial improvement in signal to noise (S/N) in triple-resonance high-resolution (HR) magic-angle-spinning (MAS) NMR of samples near room temperature (RT) in high-field magnets where the magnet's RT shim bore is greater than 60 mm. All critical circuit components, including the sample coils, are located along with the spinner assembly in a thermally insulated cold zone pressurized with helium gas. The spinner assembly attaches to a sealed, curved, rotor-loading tube to permit automatic sample change, and it is surrounded by a partially insulated jacket cooled with a cryogenic fluid, generally nitrogen gas. The MAS probe is also compatible with magic angle gradients, variable temperature operation, field locking, and commonly available closed-cycle cold fingers. One major challenge in implementing CryoMAS is solving the problem of gas leakage from the spinner bearing, drive, and exhaust nitrogen into the cold zone, as some components will necessarily be ceramic, some plastic, and some metal. It is not desirable to use helium for the spinner bearing and drive gases for cost reasons and to prevent risk of degradation of o-ring-sealed magnet cryostats. A pressurized helium atmosphere in the cold zone may be utilized to prevent nitrogen flow from the spinner exhaust streams or atmosphere into the cold zone. The drawback to a pressurized cold zone is that the heat transfer coefficient in dense helium at low temperatures is very high, making it challenging to cool the sample coils and all the large, critical, circuit components in a practical manner. Part of the solution here is to use a first-stage cooling-jacket around the major heat leaks near the spinner exhaust flows. The critical components may be insulated with fine glass wool or teflon foam and conduction cooled without cooling much of the cold zone below the temperature of the first-stage cooling. The use of coaxial sapphire capacitors allows the noise contributions from the most critical capacitors to be reduced to a minor fraction of the total.
Owner:DOTY SCI

Integrated technology for capturing and mineralizing carbon dioxide

The invention relates to an integrated technology for capturing and mineralizing carbon dioxide, which is characterized in that renewable ammonium salt (NH4HSO4) is used for obtaining a calcium and magnesium ions-containing leachate from ores or solid wastes, the leached residual slag is a small-size particle with high content of silicon oxide, the leachate is subjected to separation, impurities removal and precious metal purification, partial solution is directly used for capturing renewable ammonia gas to obtain a calcium and magnesium containing ammonia-rich liquid, CO2 is captured by the ammonia-rich liquid under normal temperature to generate ammonium carbonate salt, then the ammonium carbonate salt is subjected to rapid reaction with another part of the leachate for depositing to obtain magnesium(calcium) salt product with high purity, and a reaction-finished solution is further heated to regenerate ammonium salt (NH4HSO4) and ammonia gas for pretreating ores and capturing CO2. According to the invention, the steps of the technology enable complete closed circulation, thereby the chemical agent amount and three wastes are reduced, two high energy consumption steps of CO2 capturing desorption and compression in a traditional method can be avoided, the efficiency for each step is more than 90%, the waste heat in a power plant can be simultaneously used for assisting the regeneration of ammonium salt, and total energy consumption of the technology can be reduced.
Owner:HUANENG CLEAN ENERGY RES INST

Method for recycling tungsten in liquids after tungsten smelting exchanges

The invention discloses a method for recycling tungsten in liquids after tungsten smelting exchanges. The method includes pH of liquids after exchanges is regulated to 8 to 10 by using sulfuric acids; calcium in liquids after a mother liquor is crystallized by using ammonium tungstate (APT) in calcium oxide or calcium hydroxide with tungsten and ammonia recycled to serve as a precipitating agent for precipitating tungsten, and a temperature of a reaction process is raised to 70 DEG C to 80 DEG C; the mixture is mixed fully to form scheelite precipitation; and filter residues are returned to a press cooking leaching process after filtration, and waste liquids are sent to a wastewater treatment process for treatment. According to the method, a method for recycling tungsten and ammonia in a tungsten smelted APT crystallization mother liquor with the application number of 20110307349.0 is combined, and partial solutions containing calcium chloride serve as precipitant materials for recycling tungsten in liquids after exchanges, accordingly, resources are recycled, salt discharges are reduced, costs for buying calcium chloride material are reduced in terms of economic benefits, and internal circulation is achieved. According to the method recycling tungsten in liquids after tungsten smelting exchanges, the technological process is simple, the tungsten precipitation rate is high, and the economic benefit is good.
Owner:ZHONGXIANG TUNGSTEN IND

Method and device for continuously preparing nano ferroferric oxide through hollow fiber ultrafiltration dual-membrane

The invention relates to a method and a device for continuously preparing nano ferroferric oxide through a hollow fiber ultrafiltration dual-membrane. Distilled water or desalted water is added into a reactor and nitrogen is fed in to remove oxygen protection; a pump I is started up to enable NaOH or ammonia water solution in a storage tank I to enter a membrane assembly A, partial solution enters the reactor through the membrane assembly A and partial solution flows back to the storage tank I in a circulating way; when pH value of solution in the reactor is increased to about 10.40, a pump II is started up to enable Fe2+ and Fe3+ mixed solution in a storage tank II to enter a membrane assembly B, partial solution enters the reactor through the membrane B and partial solution flows back to the storage tank II in a circulating way; the flow of raw materials and precipitant is controlled, the pH value of solution in the reactor is kept to be 10.4-11 and Fe3O4 is generated through reaction under agitation. The Fe3O4 is crystallized in water bath, is separated through a magnetic seat, is water-washed to a state with pH value of 7, is shocked through ultrasonic wave and is dried under a vacuum condition to obtain black nano Fe3O4, wherein the grain size of the black nano Fe3O4 is 10-20nm.
Owner:中国大唐集团科学技术研究总院有限公司

Measuring method for sulfate radical in gas

The invention relates to a measuring method for sulfate radical in gas, and belongs to measuring methods for impurities in gas. The technological problem to solve is to provide the method for quickly and precisely measuring the sulfate radical in gas. The method comprises the following steps: a, sampling and preparing a sample: introducing gas containing sulfate radical into a buffering device and an absorbing device, and cooling the absorbing device to the indoor temperature to obtain a sample solution A after the gas is absorbed by a solution in the cooling device; b, treating the sample: transferring partial solution A to an instrument with constant volume, adding hydrochloric acid, a dispersing agent and a barium chloride solution sequentially to enable the sulfate radical in the solution to be settled and dispersed uniformly, shaking up, fixing the volume, and standing to the indoor temperature to obtain a sample solution B; c, measuring: measuring absorbancy value of the sample solution B by adopting a spectrophotometer to obtain the weight of the sulfate radical, and finally, calculating the concentration of the sulfate radical in the gas. The concentration of the sulfate radical measured by adopting the method provided by the invention is 10-524 ppm. The method is simple and quick to operate, and the precision of the measured result is high.
Owner:PANZHIHUA STEEL ENTERPRISES XINYU CHEM

Purification device and purification method of organic amine desulfurizing agent in organic amine method desulfurizing process

ActiveCN106422675ASolving the Problem of Heat-Stable Salt LoadingStable and cleanDispersed particle separationPurification methodsPlate heat exchanger
The invention discloses a purification device and a purification method of an organic amine desulfurizing agent in an organic amine method desulfurizing process. A regenerated desulfurizing agent solution is subjected to heat exchange through a plate heat exchanger, and is then pumped into a safety filter by a pressurizing pump to be filtered; obtained filter liquid enters a nanofiltration device; filter liquid obtained after the nanofiltration is discharged into a filter liquid groove; concentrated liquid obtained through nanofiltration is discharged into a solution storage groove; the purification device also comprises a freeze crystallization system connected with the plate heat exchanger; partial solution subjected to heat exchange is subjected to freeze crystallization to remove sodium sulphate; then, the regenerated desulfurizing agent solution subjected to the sodium sulphate removal is guided into the plate heat exchanger to be subjected to heat exchange again; next, obtained liquid and the regenerated desulfurizing agent solution in a pipeline are jointly pumped into the safety filter by the pressurizing pump to be filtered; the nanofiltration device is connected with a cleaning system and a reverse flushing system. The content of Cl<-> and SO4<2-> in the regenerated desulfurizing agent solution can be continuously reduced; the cleanness of the desulfurizing agent of the desulfurizing system and the stability of the desulfurizing effect can be ensured.
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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