352results about How to "Large circulation" patented technology

The invention discloses a stirred tank reactor and aims at improving a stirring turbine in the stirred tank reactor by using a four-layer combination stirring turbine. The stirring turbine comprises a first layer turbine, a second layer turbine, a third layer turbine and a fourth layer turbine which are arranged from the middle to the bottom of a stirring shaft sequentially. The first layer turbine is an upward axial flow turbine, the second layer turbine is a disk type turbine, the third layer turbine is an upward axial flow turbine, and the fourth layer turbine is a radial flow turbine. Radial circulation close to a liquid level, radial circulation close to a middle area of a stirred tank and radial circulation in a bottom area of the stirred tank are formed, so that circulation quantity inside the stirred tank is big and mixing time is short. Poor mixing area does not exist, and solid containing rate and gas containing rate are evenly distributed. A mass transfer condition of air and liquid is good, and single transfer efficiency is high. Entrainment quantity of sizing is greatly reduced, fouling of a heat exchanger is reduced, and service life is long. Operation cost is lowered, and production cost is saved.

The invention relates to polytetrafluoroethylene (PTFE) composite film filtering materials for air filtering industry. The polytetrafluoroethylene composite film filtering materials comprise the following components: fiberglass as basement film; polytetrafluoroethylene as surface film; and adhesive agent which is one of polysulfone, nylon 66 and polyvinylidene fluoride fibre for binding the fiberglass and polytetrafluoroethylene; pore-forming material which is one of metal salt KI and NH#-[4]Cl; solvent which is one of dimethyl acetamide, dimethyl formamide and N-methyl pyrrolidone. The content (by weight) of macromolecular compound and pore-forming material is: 5% to 30% of macromolecular compound, 5% to 15% of pore-forming material. The fiberglass and polytetrafluoroethylene composite materials can improve filtration efficiency and have improved hydrophobicity, high-temperature resistance and corrosion resistance.

The present invention provides an integrated process for the production of p-xylene, comprising the steps of A) separating a mixed feedstock containing benzene, toluene, C8 aromatic hydrocarbons, C9 and higher aromatic hydrocarbons, and non-aromatic hydrocarbons from a reforming unit, to obtain a first benzene stream, a first toluene stream, a first C8 aromatic hydrocarbon stream, a stream of C9 and higher aromatic hydrocarbons, and a stream of non-aromatic hydrocarbons; B) feeding the stream of C9 and higher aromatic hydrocarbons from step A) to a C9 and higher aromatic hydrocarbon dealkylation unit, where dealkylation reaction occurs in the presence of hydrogen, and separating the reaction effluent to obtain a second benzene stream, a second toluene stream, and a second C8 aromatic hydrocarbon stream; C) feeding both the first toluene stream and the second toluene stream to a toluene selective disproportionation unit, where toluene selective disproportionation reaction occurs in the presence of hydrogen to produce a stream containing C8 aromatic hydrocarbons including p-xylene and benzene, which stream is separated to obtain a third C8 aromatic hydrocarbon stream, a third toluene stream, and a third benzene stream, with the third toluene stream being returned to an inlet of this unit; D) feeding both the first C8 aromatic hydrocarbon stream and the second C8 aromatic hydrocarbon stream to an adsorption separation unit, to obtain a first p-xylene product stream and a fifth C8 aromatic hydrocarbon stream, with the fifth C8 aromatic hydrocarbon stream being passed to an isomerization unit; E) feeding the third C8 aromatic hydrocarbon stream to a crystallization separation unit, to obtain a fourth C8 aromatic hydrocarbon stream and a second p-xylene product stream, with the fourth C8 aromatic hydrocarbon stream being passed to the adsorption separation unit or the isomerization unit; and F) feeding an effluent of the isomerization unit to an inlet of the adsorption separation unit.

The invention discloses a ticket check and payment system and a method for urban rail transit financial IC cards. The ticket check and payment system comprises ticket gates used for reading card information of financial IC cards and generating transaction data, clearing center systems used for calculating fees according to the transaction data and generating transaction records, and a financial preprocessing system used for sending payment requests and the transaction records to a CUPS (China Union Pay System) to enable the CUPS to make payment online according to the transaction records and a corresponding bank background system. Financial IC cards are applied to the field of urban rail transit. Based on the fact that financial IC cards have a large circulation and wide coverage, post-payment is adopted. Online real-time verification is avoided. The transaction speed is ensured. Financial IC cards can be used in urban rail transit throughout the country. The demand of the masses for taking the subway fast is well satisfied.

Disclosed is an EWOD device for processing multiple droplets through multiple temperature zones. The device is configured to achieve a high spatial density of temperature zones with a wide temperaturedifference between hot and cold zones. A first set of temperature control elements is arranged above (or below) a fluid gap in an EWOD device and a second set of temperature control elements is arranged below (or above) the fluid gap. A temperature control element of one set is offset from temperature control elements of the other set in the plane of the fluid gap. The temperature control elementof one set may be located at a different separation from the fluid gap to the temperature control element of the other set. The device has an optional temperature control element and / or arrangement which offsets the low temperature point from the inlet temperature. The two sets of temperature control elements are substantially interacting, in the sense that they cannot be considered to be thermally isolated from one another. This invention also describes methods to process multiple droplets within the multiple temperature zones.