58results about How to "Radial temperature difference is small" patented technology

The invention discloses a manufacturing process for preparing a high-viscosity phenyl methyl vinyl silicone rubber. The manufacturing technique comprises three steps: polymerization, catalyst deactivation and low boiling, and all the steps are finished in a high-power high shear vacuum stirring device. Compared with the prior art, the process has the advantages of remarkably improved heat transfer effect, small reaction kettle radial temperature difference, and greatly improved product quality, and can be used for large-scale production. For the high-viscosity phenyl methyl vinyl silicone rubber prepared by the process, the volatile compositions are less than 3 percent, the molar mass is larger than 700,000, the polydispersity index representing the molecular weight distribution is less than 3, and the production capacity of a single set of equipment is large. The indexes are better than that of the similar products manufactured by a static method on the market.

The invention provides a heating coil, which comprises a power wire used for connecting transformers or frequency converters, and a plurality of coils which are used for generating magnetic flux, and have at least two layers and at least two pancakes. The heating coil has the advantages that the heating coil adopts multiple layers and pancakes of coils closely connected together, and improves thecoil turns of unit area, thereby reducing the radial temperature difference inside workpieces and simultaneously improving heating efficiency. Additionally, multiple sections of coils are connected in parallel / series, so that the overall length of the coils is increased, thereby enlarging axial heating areas of the workpieces.

The invention discloses a sleeve type shock reducing and equalizing plate. The sleeve-type flush-reducing equalizer includes a tray and several chimney-type distributors arranged on the tray; the chimney-type distributor includes a downcomer and a shock-reducing barrel arranged at the upper end of the downcomer; Both the flushing barrel and the downcomer are cylindrical structures with openings at both ends, the flushing reducing barrel and the downcomer are arranged up and down, and the diameter of the flushing reducing barrel is larger than that of the downcomer. The shock reducing and equalizing plate of the present invention is a newly added internal member of the reactor, which is arranged in the idle space of the upper head of the hydrogenation reactor, or the upper end of the cylinder body of the hydrogenation reactor. The shock reducing and equalizing plate of the present invention can reduce the strong impact force formed by the residual kinetic energy when the fluid enters the reactor, and eliminate the "wave pushing" phenomenon of the inclined streamline formed when the central point enters the liquid layer of the distribution plate. The sleeve-type shock-reducing flow equalizer of the present invention is suitable for all hydrogenation reactors, and is especially suitable for hydrogenation reactors with large liquid-gas ratio and large scale.

The invention discloses a hydrogenation reactor with a buffer component. The hydrogenation reactor of the present invention includes a material inlet pipe, an inlet diffuser, an upper head of the reactor, a flow-reducing equalizer plate, a catalyst bed, a catalyst support grid, a reactor cylinder, a lower head of the reactor, and an outlet collecting device, material outlet pipe and unloading pipe. The impact reduction and equalizing plate is set in the idle space of the upper head of the reactor or at the upper end of the reactor cylinder; the impact reducing and equalizing plate includes the impact reducing tray and several impact reducing trays. Distributor, the distributor includes a grid, a material drop tube and a connecting rod, the grid is arranged above the material drop tube, and the grid and the material drop tube are connected through a connecting rod. The hydrogenation reactor of the present invention is suitable for the hydrogenation reaction process, especially the hydrofinishing or hydrocracking process with relatively large reactor scale.

The invention relates to a metallic element lattice doped silicon carbide reactor, and applications thereof in preparation of ethene through ethane dehydrogenation. The metallic element lattice dopedsilicon carbide reactor is invented base on a novel silicon carbide material which possesses excellent heat conductivity and chemical reactionlessness; based on the metallic element lattice doped silicon carbide reactor, and reaction conditions, the process is capable of realizing ethene high yield synthesis. The ethane conversion rate ranges from 70 to 100%; ethene selectivity ranges from 80 to 99.99%; propylene selectivity ranges from 0 to 5%; and aromatic hydrocarbons selectivity ranges from 0 to 5%. The metallic element lattice doped silicon carbide reactor possesses following characteristics: catalyst service life is long (>1000h), catalyst high temperature (<1700 DEG C) stability is excellent, ethane conversion rate and product selectivity are high, energy consumption is low, processrepeatability is excellent, and operation is safe and reliable; and the industrialized application prospect is promising.