54results about How to "Short starting time" patented technology

The invention relates to a combined nitrification method for synthesizing nitrobenzene and a combined device of a micro-reactor and a stirring reactor. During the synthesis, benzene and mixed acid of nitric acid and sulfuric acid are taken as initial materials, are conveyed to two inlets of the micro-reactor through a metering pump respectively, are premixed in micro-channels, and perform partialnitration reaction at the same time; and a first-stage nitration product with high dispersion state is produced at an outlet of the micro-reactor. The first-stage nitration product continuously flowsinto a stirred tank nitration reactor to continue to react. The method and the device perform continuous operation under the condition of the mixed acid with high water content and have safe process,the conversion rate of the benzene is 99.85 percent (mol), and the selectivity of a product, namely the nitrobenzene is 99.8 percent (mol).

The invention relates to a method and a device for operating a steam turbine (10) comprising several no-load or light-load phases (11, 12). All phases (11, 12) are supplied with steam in order to ensure good preheating. According to the invention, the supply of a phase (11) is selected in such a way that said phase (11) produces the least possible output, in particular no output. The enthalpy differential ( DELTA h) between the entrance (25) to and exit (26) from the phase (11) is thus preferably reduced to zero.

The invention relates to a method for preparing a vulcanization type gasoline hydrogenation upgrading catalyst. Gasoline hydrogenation catalysts are treated by vulcanizing agents with multiple sulfur ions and organic nitride which is used as a passivator at the low temperatures, active components in the gasoline hydrogenation catalysts comprise a type or a plurality of types of Mo and W of VI B groups and Co and Ni of VIII B groups, and stabilizers comprise a type or a plurality of types of Zn and Cd of II B groups, Na and K of I A groups and rare earth metal La and Ce. The method has the advantages that cascade full vulcanization can be carried out on metal oxide or precursors of the metal oxide, and strong acidic sites in ZSM-5 molecular sieve composite carriers can be selectively passivated; the vulcanization type gasoline hydrogenation upgrading catalyst prepared by the aid of the method is short in on-stream time, high in hydrogenation and olefin reduction upgrading activity, selectivity, carbon deposition resistance and liquid yield and low in octane number loss, and accordingly the method and the vulcanization type gasoline hydrogenation upgrading catalyst are particularly applicable to producing clean gasoline components from inferiorly catalytically cracked gasoline by means of hydrogenation and olefin reduction upgrading at a low cost.

The invention belongs to the technical field of machinery, and relates to a starting method for a generator reversely driving a high-power diesel engine. It involves a starting method in which the generator reversely drives a high-power diesel engine. The generator adopts a combination of a diesel engine and an asynchronous generator. The starting method is as follows: firstly, connect an external high-voltage AC power The voltage of the power supply is converted into the rated voltage of the variable-frequency variable-speed generator set, and provides voltage for the variable-frequency variable-speed generator set; at the same time, the frequency converter activates the control box of the unit and sends out an electric start command for the generator set. Start to rotate and reversely drag the diesel engine to rotate through the disc coupling or high-elastic coupling. When the diesel engine speed reaches the set speed, the generator set control system instructs the injector to inject fuel, and the diesel engine ignites and starts smoothly. The invention reduces the waste of fuel oil and reduces the pollution of discharge.