Nozzle for absorption apparatus

 

(57) Abstract:

The invention relates to a device contact between the gas and liquid mass transfer apparatus gas, petroleum, chemical and petrochemical industry, in particular to nozzles mass transfer devices operating three-phase fluidized layer in aggressive environments, and is used in the columns for gas cleaning and acid components. The purpose of the invention is the improved quality of cleaning gas from the acid components by increasing the multiplicity of the update contact surface phases. The nozzle is made in the form of a solid circular disk, perpendicular to and eccentric with respect to each other so that the magnitude of the eccentricity 0.065 - 0.1 diameter, with one solid circular disk provided with two through holes located on the axis of symmetry on both sides of the axis of intersection of the disks, and placed in the double jacket of the mesh material, so that the first grid layer is fixed through the through holes and the second freely relative to the first. 5 Il., table 2.

The invention relates to a device contact between the gas and liquid mass transfer apparatus gas, oil, chemical and neftehimicheskogo in aggressive environments and is used mainly in the columns for gas purification from impurities, such as acid gas.

Known nozzle, made in the form of smooth balls of plastic [1]

The disadvantage is that the nozzle of the balls with a smooth surface not provide intensive mixing of the liquid with the gas, and due to insufficient mixing of the liquid with the gas contact surface phases remains minimal. An advantage of the nozzle is the simplicity of its manufacture and that when it is used in the apparatus do not form stagnant zones.

Closest to the technical nature of the invention is a nozzle, made in the form of three mutually perpendicular rigidly fixed at the center of the disk [2]

The use of attachments such design allows to increase the intensity of mixing and to increase the surface of contact between liquid and gas phase. However, such nozzle 3 is perpendicular to the disk does not provide a high intensity mixing of the liquid with the gas. The nozzle is moved without rotation around an axis, which contributes to a high mixing intensity, unevenly distributed over the volume of the layer, increasing the hydrodynamic resistance is a rule effective mixing of the liquid with the gas contact surface phases remains minimal, not a high quality cleaning of gases from acid components.

The aim of the invention is to improve the quality of purification of acidic components from natural gas by increasing the multiplicity of the update contact surface phases.

This is achieved by the described nozzle, made in the form of mutually perpendicular rigidly fixed disks.

What's new is that it is made in the form of a solid circular disk, perpendicular to and eccentric with respect to each other so that the magnitude of the eccentricity 0.065-0.1 diameter disc, and one solid circular disk provided with two through holes located on the axis of symmetry on both sides of the axis of the junction (bonding) disks and placed in the double jacket of the mesh material so that the first grid layer is fixed through the through holes and the second freely relative to the first.

This embodiment of the nozzle provides due to the difference of the weights of each of the semi-circle, rotating in different axes and any direction depending on the hydrodynamic regime of gas-liquid flow, eliminates the possibility of formation of stagnant zones. In addition, the location of the nozzle in the double jacket of the cm contact surface, contributing to the increasing frequency of its updates. During operation of the nozzle in the fluidized bed process intensive mixing and update contact surface phases in two steps on the surface of the package and on the outer surface of the shirt.

In Fig.1 shows the proposed nozzle, General view; Fig.2 the inner part of the proposed two nozzles of a disc perpendicular to and eccentric with respect to each other; Fig.3 section a-a in Fig.1; Fig. 4 cross-section B-B in Fig.2; Fig.5 the inner part of the proposed nozzle in the shirt of the mesh material, mounted through the bushing holes.

The attachment contains two round solid rigidly fixed disk 1 and 2 perpendicular to and eccentric (Fig.1,2) relative to each other so that the magnitude of the eccentricity 0.065-0.1 of the diameter of the disk, while the disk 1 is provided with two through adversity 3, located on the axis of symmetry in the double jacket of the mesh material of 4.5, the first grid layer 4 is fixed through the through holes 3, and the second layer 5 freely relative to the first layer (Fig.1).

The amount of eccentricity was found experimentally in dependence on intensive work on the Sabbath., is ostavljaja it all the time to rotate, move in any position, direction and in a variety of axes.

When the amount of eccentricity of the smaller 0,065 D of the disc decreases the displacement of the center of gravity of the nozzle about its axis passing through the center of gravity nozzle adopts a more stable position, increases the unevenness of its distribution by volume of the layer, and accordingly the hydraulic resistance of the layer head.

When the value of the eccentricity greater of 0.1 D disk surfaces of the two semicircles is reduced and the two increases, disturbed optimally chosen action multidirectional forces flowing from the top of the liquid and a rising gas. Slows down the mandatory rotation of the nozzle about its axis.

The offset of the center of gravity of the nozzle about its axis passing through the center of gravity, gives an unstable position of the nozzle, causing it to rotate in any position, direction and in a variety of axes due to the fact that it is made in the form of a continuous two round disks perpendicular to and eccentric with respect to each other so that the magnitude of the eccentricity 0.065-0,1 D drive, with one solid circular disk provided with two through ainuu shirt and mesh material (RS-12X18H10T TU-2602-354-76) the first grid layer is fixed through the through holes and the second freely relative to the first. Becomes possible increase in the intensity of mixing gas with liquid.

The nozzle is a kind of rotary element rotating around its axis and high-speed stream together with a shirt, freely moving inside her, increasing the surface contact between gas and liquid and its multiplicity update, promoting uniform distribution within the absorption layer, and uniformly aligning the distribution of gas-liquid flow in the entire volume of the fluidized bed, which allows to stabilize the quality of gas cleaning and acid components.

Place Powerline holes to chose from design considerations, such a solution increases the instability of the nozzle.

The device operates as follows.

In the initial stage of operation, the nozzle is located on the support bars in a fixed position. The gas coming from the bottom of the apparatus, passes through the channels formed between the nozzles, where he meets with the liquid coming from the top. The channels have a complex shape, since the gaps between the nozzles Packed the Z. The nozzle has a large contact surface per unit volume. Even in the layer of stationary nozzles is aerated, excessive foaming, which contributes to a significant increase in contact surface phases.

With increasing gas velocity, the system enters a mode developed fluidization. When the nozzles are in the expanded condition, moving threads interacting phases, influencing the shapes of disks (which serve as blades), bring the nozzle to the required intensive rotation, as with one hand on the nozzle force directed vertically upwards and is applied with an offset from the center of gravity, and on the other side of the force is determined by weight of the liquid directed downward and located on the other side of the vertical axis passing through the center of gravity of the nozzle. Because the density of the rising gas is always less than the density of the flowing fluid multidirectional forces provide constant rotation of the nozzle, which in turn contributes to intensive mixing of the liquid with the gas, and this is achieved by increasing the efficiency of mass transfer between them, the quality of the cleanup.

Packaging free simple is contact phases per unit volume and is one of the steps, creating a well-developed contact surface per unit volume and increasing multiplicity update contact surface phases on the mesh material.

Packaging and shirt nozzle sleeve mesh as elements nozzles create a well-developed contact surface per unit volume, facilitating fragmentation of jets of gas and liquid, increasing the multiplicity update contact surface phases in two areas of the mesh material, greatly increasing the effective contact surface phases throughout the volume of fluidization and intensity of mass transfer.

The most important condition for the effective operation of the nozzles in the fluidized bed is the right choice with its specific weight. Increasing the mass of the nozzle reduces the degree of expansion of the layer and consequently the free section for the passage of gas and liquid flows, increases the friction between the nozzles, the unevenness of their distribution, which leads to an increase of the hydraulic resistance of the layer. Increasing the number of layers of shirts leads to weight gain tips. The number of stages (two stages) is selected experimentally. Column apparatus in the gas region operate in conditions of fluctuating loads and kacestvennogo provides stabilization of hydrodynamic conditions of the process and high cleaning efficiency.

P R I m m e R. Nozzles in the above execution goes to sleep for lattice plates failure type, which is mounted in an absorption column with a diameter of 400 mm (installation experienced). The top plate is fed a liquid stream of an aqueous solution of an absorbent of monoethanolamine (12 wt. the rest is water) mass velocity 41524 kg/m2h, and the bottom gas at a rate of 2.54 m/s Speed of onset of fluidization 2.54 m/s depends on the hydrodynamic regime of the system and is calculated or experimentally. The gas composition is given in table.1.

The gas entering the bottom plate, passes through the channels formed between the nozzles, where he meets with an aqueous solution of monoethanolamine, from above. At speeds below 2.54 m/s nozzle is stationary, but in the channels is dispergirovanija fluid gas stream and intense fragmentation and increasing multiplicity update contact surface phases on the surface of the mesh material, which is more extensive contact surface per unit volume, better broken streams of gas and liquid.

With increasing speed above 2.54 m/s the system enters a mode developed fluidization. In this nozzle perinasal to intensive rotation around its axis and high-speed stream. Packing the space between the semicircles drives and shirt nozzle sleeve mesh as elements of the nozzles in the set of features to create two additional developed surface area per unit volume, increase the effective contact surface phases throughout the volume of fluidization and intensity of mass transfer.

The use of the nozzle allows to increase the efficiency of mass transfer. The results of the nozzles shown in table.2.

From table.2 shows that the proposed cap allows to increase the degree of purification of acidic components from natural gas to about 70-75. compared to the prototype (10 vol.).

Technical and economic efficiency of the proposed extension to the absorption apparatus is formed by increasing the multiplicity of the update contact surface phases, i.e., by increasing the effective contact surface phases, the stabilization process of hydrodynamics in fluidized bed and as a consequence an increase in the degree of gas purification from acid components 7 times.

NOZZLE FOR ABSORPTION APPARATUS, made in the form of mutually perpendicular zhestkokrilih solid round disks, wherein the disks are eccentric relative to Ohotniki holes, located on the axis of symmetry on both sides of the axis of intersection of the disks, and placed in the double jacket of the mesh material so that the first grid layer is fixed through the passing hole, and the second freely relative to the first.

 

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