TH14702B - Heat exchanger tube - Google Patents

Abstract

The utilitarian heat exchanger tubes are reactor tubes for the production of ethylene and are improved in terms of heat transmission efficiency, with fins that rub form on the inner surface of the tubing wall. In a certain area or a certain area Or the entire area that is organized from the inlet end of the pipe to Destination of that Along the axis of such fin tubes are aligned in The direction that intersects with the axis of the pipe and has a suitable pitch. The fins are formed. Where helical protrusions on the inner surface of the tube wall around the axis or each are in the form of an annular overhang that extends along the substrate on the inner surface in the direction intersecting with the axis. Is a right angle to that Fin pitch The cutting angle of the fin to that axis and the height of the fin. Is appropriately defined in a consistent manner To the inner diameter of the pipe

Claims (9)

1.Pipe for heating modified to be directly heated in Furnaces for thermal decomposition And for producing ethylene Or ethylene and propylene Such pipes consist of Pipe wall made of heat-resistant alloy And has an inner surface which defines the boundaries It is a channel for the flow of hydrocarbon materials. In the form of a single-phase gas through that area as well High speeds and high temperatures to cause thermal disintegration reactions in the pipes. Method for shaking hydrocarbon material through the channel. To spread the material As a gas across all cross-sections of the channel The shaking path is in the form of protrusions. And is placed on the inner surface of the pipe wall in the direction of intersection with the longitudinal axis of the pipe. To mix materials in The form of gas flowing along the funnel is a uniform mixture. To achieve the temperature profile at Evenly across all cross-sections of the said channel, and The shaking path is created in a number of locations that are arranged from destination. Inlet of the pipe to the outlet of the pipe along the axis of the pipe. The shaking path has an ideal pitch. Equations and the appropriate distance between adjacent areas 2. The tubing for thermal cracking as specified in claim 1, where each such area has at least 1 m axial security to perform thermal breakdown. Of hydrocarbon materials that will be used to achieve effective results 3. The specified heat-ruptured pipe provides claim No. 1 where the route Such a shake in at least one area has a reasonable pitch. And appropriate distance from other areas Different 4. The heat-cracking pipes specified in claim 1, where each such area has at least one meter of axial security. To perform the thermal fusion of The hydrocarbon material that will be used to achieve this effect is effective. 5.Pipes for thermal fracturing include A cylindrical tube piece with an inner surface that defines a channel for Processed with single phase gas hydrocarbon materials. That were pressurized at increased speed and temperature Which is effective in causing internal thermal fission reaction to produce ethylene A cross-sectional method for distributing gas-based material across the channel cross-section. To produce a gaseous distribution of temperature uniformly rated materials at For disintegration With the required heating across the entire cross-section of the tubular section These methods include The fins are positioned on the inner surface of the tubing element. And protrudes in such a direction that it is cut With the longitudinal axis of such pipe parts And operating to deflect the material in the form of gas that flows along The funnel is provided in a profile at an even temperature relative to all cross-sections. Of the said channel The flanges are arranged in a tubular piece between the inlet and outlet ends of the Such pipe and flanges shall be in at least one continuous helical pattern with appropriate tilt angles and an axial spaced pattern that is annular. Spaced at It is suitable to obtain the required mixtures while limiting the pressure loss in such hydrocarbon materials. 6.Thermal separation tubes as specified in claim 5, where such fins are formed in at least three separate regions arranged from the inlet end of the tube. The said pipe to the outlet of the said pipe along the axis of the said pipe. And such fins are positioned in any area with different proper spacing compared to them in close proximity. 7.Heat cracking tubes as specified in claim 5, where parts There are a number of areas in the pipe. And where there is axial distance between the near fins Each other in one area is different from that in another area. 8.Heat cracking tubes as specified in claim 7, where parts There are at least three areas of the said pipe being arranged axially from the inlet end of the said pipe to the Destination of the said pipe 9.Thermal cracking pipes specified in claim 7, where each such area has an axial length of at least one meter.