RU1782626C - Apparatus for degassing water - Google Patents

Abstract

SUMMARY OF THE INVENTION: The apparatus includes a container with a nozzle for introducing source water, under which a divider in the form of a spiral impeller is mounted for rotation. From the spreading element, the source water enters an inclined drain shelf, which is made with roughness protrusions, 3 silt.

Description

The invention relates to devices for degassing liquids and can be used in the oil and refining industries to remove harmful gases from wastewater.

The aim of the invention is to increase the efficiency of the degassing process in the presence of oil in degassed water.

The goal is achieved. that the apparatus for water degassing is provided with a divider made in the form of a bracket mounted to rotate around the vertical axis of the spiral impeller and a bracket attached to the upper part of the housing, and the inclined drain shelf is made with roughness protrusions.

The supply of a device for water degassing with a divider, which is rotatable around the vertical axis of the impeller with a spiral-shaped generatrix and a bracket attached to the upper part of the casing, provides a significant increase in the cross-section of the gas-liquid mixture through which harmful gases are released, including hydrogen sulfide contained in the water, and an inclined drain shelves with roughness protrusions also respectively increase the surface of the thin-layer flow from which gases.

In FIG. 1 schematically shows an apparatus for removing hydrogen sulfide from degassing mode from oilfield wastewater; FIG. 2 - divider with a spiral generatrix, in FIG. 3-apparatus for removing hydrogen sulfide from oilfield wastewater in an oil discharge mode.

The apparatus includes a container 1, inside of which an inclined drain shelf 2 is placed with roughness protrusions 3, forming a cavity with the walls of the container 1, pipes 4-6, respectively, for supplying source water, gas and degassed water. An oil discharge pipe 7 is made in the upper part of the cavity under the drain shelf, and the tank 1, in addition, is equipped with a water overflow pipe 8, and the level of overflow through the pipe 8 is lower than the level of oil drain through the pipe 7 so that when water overflows through its pipe 8 the level was below the level of discharge through pipe 7.

At the inlet of the gas-liquid mixture into the container 1, a flow divider 9 is mounted on the shaft 10 with a guide 11 through the nozzle 4, to fix the flow divider 9

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A bracket 12 is fixedly fixed in the upper part of the container 1. The divider shaft 10 and the guide 11 are threaded to move the divider along the vertical axis and to be replaced. Moving the divider in a vertical plane allows the degree of separation of the gas-liquid mixture of the stream entering the tank 1 to be changed depending on the operating requirements.

The device in degassing mode works as follows. ,

Initial water is supplied through the pipe 4 to the tank 1, from which hydrogen sulfide must be removed and fed to a divider 9, which rotates on the shaft 11 and, when it is rotated, discards individual volumes of the gas-liquid mixture onto the drain shelf 2 with roughness protrusions 3, along which it flows in the form of a thin layer flow into the lower part of the tank 1, where it accumulates, forming a buffer for the pump out of the pump (not shown in the figure). In this case, the presence of roughness protrusions 3 on the drain shelf 2 and the flow dissecting by the divider 9 increases the surface area through which the main amount of hydrogen sulfide contained in the form is removed, which is discharged through the nozzle 5. The remaining amount of hydrogen sulfide from the water is released in the lower part of the tank 1, mainly from the surface and top layers. However, as water accumulates in the lower part of the tank, it settles, oil particles contained in the water float and accumulate on the surface of the water, forming a continuous film of oil that isolates the water from the cavity of the tank

1 and prevents the release of residual hydrogen sulfide. This reduces the effectiveness of degassing.

In order to increase the degassing efficiency by eliminating the oil film on the surface of the water that accumulates in the lower part of the tank 1, the apparatus is periodically switched to the accumulated oil discharge mode / Fig. 3 /. To do this, the water drain through the pipe 6 is stopped, for example, by closing the gate valve in / (not shown in the figure), then the water level in the tank 1 rises. Since the drain shelf 2 is mounted obliquely and its bottom edge is near the second end tank of the wall 1, after raising the water level above the lower edge of the shelf 2, the oil film tends to float on the water surface under the shelf 2. However, when raising the water level from the tank 1, the shelf is inclined

2 concentrates and directs the oil layer to the upper part of the cavity under the shelf 2, where

an oil discharge pipe 7 is placed. As the water level rises, the oil layer thickness increases and when the water level approaches the level of water overflow through

pipe 8, tilted with oil under the shelf 2, begins to drain and is discharged from tank 1 through pipe 7. This is facilitated by the fact that the level of the overflow of the pipe 8 is lower than the level of the overflow of the pipe 7 and the oil density is less than the density of water. The overflow level of the pipe 8 provides water drainage, only through it, preventing the ingress of water through the pipe 7 into the oil collection pipeline.

After all the oil that has accumulated with the oil under the shelf 2 is drained through the pipe 7, the drainage of degassed water through the pipe 6 is opened. In this case, the water level in the tank decreases to the calculated level.

which is supported by the level control / not shown /, and the device again goes into degassing mode ..

With fluctuations in the fluid flow, when the fluid level in the tank 1 fluctuates without affecting the valve installed on the water discharge pipe 5, the water is drained from the tank automatically.

The proposed device, in comparison with the prototype, improves the conditions of gas evolution from water and increases the efficiency of the degassing process, since the supply of a device for degassing water with a divider provides a significant increase in the cross-section of harmful gases when a gas-liquid mixture is cut, and the inclined drain shelf with roughness protrusions also respectively

increases the surface of the thin-layer stream from which the emission of harmful gases occurs.

The resulting vortex glomeruli behind the ridges of roughness and arising in

vacuum increases the efficiency of the degassing process in general.

Claims (1)

The claims A device for water degassing, including a tank with nozzles for supplying source water and discharging gas and water, an inclined drain shelf, nozzles for draining oil and overflowing, characterized in that, in order to increase the efficiency of degassing, it is equipped with a divider installed under the nozzle for supplying water and made in the form installed with the possibility of rotation around the vertical axis of the spiral impeller, 517826266 attached to the upper part of the casing, the shelf is made with protrusions of the okhovat- ers by means of a bracket with a drain pan. Layers nave w Stoma $ ofa fifteen AP and P 8 Figure 1 P Sewage. Ma / Uro $ e # b overflow Fig.Z