Nozzle for mass-transfer apparatus
Nozzle for mass-transfer apparatus relates to contact devices for mass transfer processes between the two phases and can find application in the petroleum, chemical, gas and other industries. The nozzle includes a hollow element in the form of a three-dimensional body formed from a strip, the strip is shaped in the form of a trough facing inward or outward three-dimensional body, which is made in the form of a single or multiple helix with a pitch less than the length of the sweep gutters. Turns mnogozahodnoy spiral in the adjacent layers intersect and (or) offset relative to each other by a half pitch to the same gutter is made in the form of a V, U or U-shaped profile. The invention improves the efficiency of mass transfer bulk packing by increasing its specific surface area and to improve the distribution of the contacting phases. 2 Il.
The invention relates to contact devices for mass transfer processes between the two phases and can find application in the petroleum, chemical, gas and other industries.
Known nozzle made and the x columns for gas liquid. Containertypes, 1980.)
These nozzles have a small specific surface area of contact is equal to the ratio of the surface scan tape from both sides on the volume of the nozzle, and a big difference free cross section when placing it on the plane horizontally or perpendicular to the generatrix, which reduces the uniformity of the flow and the efficiency of the process of mass transfer.
Known nozzle copyright certificate №1606162 B 01 J 19/30 (prototype), which partially resolves the above-mentioned disadvantages due to the use of spiral wound rings from strip. Perform a nozzle from a flat strip by winding it spirally increases the specific surface of the nozzle and reduces the difference of the free cross sections of the nozzles in the longitudinal and transverse direction, however, is limited, and disadvantages on uneven flow and reduce efficiency is preserved.
The aim of the invention is to improve the efficiency of mass transfer bulk packing by increasing its specific surface area, improve the distribution of the contacting phases.
The aim is achieved in that the hollow element in the form of a three-dimensional body formed from a strip, shaped in the form of a trough facing inside or outside the volume of the that multiple turns of the spiral in the adjacent layers intersect and (or) offset relative to each other by half a step, and gutters are made in the form of a V, U or U-shaped profile.
The execution of the nozzles of the profiled strip in the form of a trough facing inward or outward three-dimensional body and a spiral with a pitch less sweep gutters, allows you to perform live section of the nozzle in longitudinal and transverse direction is approximately the same, which improves the distribution of the contact phase in the nozzle; to increase the specific surface of the nozzle, which increases the efficiency of mass exchange process; to perform a nozzle with a maximum holding capacity of the liquid phase (in the direction of the open side of the trough to the center of the nozzle); to perform a nozzle with a minimum holding capacity of the liquid phase (in the direction of the open side of the grooves from the center of the nozzle).
Perform a nozzle in the form of multiple spiral offset of turns in adjacent layers allows, in addition to the increased surface area of the nozzle, to improve flow distribution and to ensure their turbulization.
Running trough the nozzle in the form of V, U and a U-shaped profile allows you to change the specific surface of the nozzle, its hydraulic soprotivlenie failure fluid and leakage of steam, to increase the contact time of the phases, to increase the efficiency of mass transfer by continuously changing the direction of flow of the gas and the liquid at the nozzle.
The author of the current level of technology is not known nozzles with these distinctive features.
In Fig.1 shows a variant of the element of the nozzle in the form of a cylindrical three-dimensional body made in the form of a single helix of the profiled strip with location grooves outward from the center (axis) of the nozzle.
In Fig.2 shows a scan strip attachments.
The offered nozzle is a solid body in the form of a spiral 1 (cylindrical, rectangular, conical, or other shape) made of strips 2, shaped in the form of a chute 3.
To increase the specific surface of the nozzle length sweep profile 3 made more of the pitch of the helix 1.
The nozzle operates as follows.
The fluid entering the nozzle is uniformly spread over its surface due to the presence of ribs and grooves providing the same living section of the nozzle in any direction. Rising gas, constantly changing direction, passing through the free section of the nozzle comes into contact with the liquid on the developed surface of the nozzle.
2. Nozzle under item 1, wherein the multiple turns of the spiral in the adjacent layers intersect and (or) offset relative to each other by half a step.
3. The nozzle on the PP.1 and 2, characterized in that the trough is made in the form of a V-, U - or U-shaped profile.
FIELD: rotary spraying apparatus; chemical, pharmaceutical, food-processing and other industries.
SUBSTANCE: proposed device is also used for such processes as condensation by evaporation, rectification, distillation, absorption, wet dust collection. Intake device has drive shaft and two coaxial cylinders; smaller cylinder is rigidly secured on shaft and larger cylinder is connected with dispersing unit. Mounted between coaxial cylinders are three intake blades; each blade consists of three parts; ascent angle of lower straight part is 12 deg.; center parts is made in form of arc of circle at radius of 0.01-0.02 mm; upper straight part is mounted at angle of 45 deg.; ratio of lengths of lower and upper parts is 1.16-1.42 and ratio of total length of parts to circumferential pitch is 0.5.
EFFECT: increased surface of phase contact and ratio of liquid circulation on contact element; reduced power requirements.
2 dwg
