SU682242A1 - Apparatus for the purification of water from petroleum products and mechanical impurities - Google Patents

Description

one

The invention relates to devices for purifying water from petroleum products and mechanical impurities and can be used in the oil producing and refining industries.

A device for treating oilfield wastewater is known, comprising a housing, a coalescence chamber with nets between which a coalescing material is placed, a pipe for removing oil and sludge, and a device for removing purified water. The water in it is fed to the coalescing filter from the side. This leads to the fact that the working volume of the coalescing load is not fully utilized. The absence of a device for supplying the purified water from above to the contact mass with evenly distributed thin streams reduces the cleaning efficiency and causes the separation of oil particles from the contact mass and entrainment into the settling part 1J.

In the known device, the removal efficiency of the slime is not high enough. The slurry layer occupies the working volume of the device capacity.

The aim of the invention is to increase the efficiency of wastewater treatment.

The goal is achieved by the fact that the coalescence chamber is made in the form

truncated cone, and the grid is placed in the upper and lower bases of the cone. In addition, the pipe to remove sludge in the proposed device is equipped with

placed above it, a cap with curved inside edges, and a ring located concentrically to the nozzle. The profile of the ring and the profile of the lower curved inside edges of the cap form an annular conoidal nozzles. A device for removal of purified water is equipped with a cylindrical-conical screen and is made in the form of a hydraulic lock. FIG. 1 shows the device section;

in fig. 2 shows an embodiment of a device for removing purified water.

The device comprises a housing 1, a nozzle 2 for introducing the source water, a coalescence chamber 3, a device 4 for removing

purified water, nozzle 5 to remove

trapped oil, contact mass 6,

pipe 7 to remove sludge, mesh 8,

ring 9 and a cone-shaped cap 10.

The device works as follows.

The water to be purified is fed into the housing 1 through the nozzle 2 and enters the coalescence chamber 3 with a granular load between the two grids. Distributing in trickles over the entire cross-section of the hull, water enters the contact mass 6 from degassed oil. Passing it, the water is cleaned from oil, which is discharged through the nozzle 5 to remove the trapped oil, and mechanical impurities fall to the bottom of the tank. Purified water is discharged through tool 4.

The water purification process at the bottom of the housing 1 accumulates sludge, which is periodically removed through the pipe 7. When the shut-off valves on the pipe 7 are opened, water enters it through an annular nozzle formed by the ring 9 and the bent edges of the hood 10. This changes the direction and character water flow to the nozzle 7, contributing to the involvement of the water jets in the peripheral part of the bottom surface of the tank and the flushing part of the sludge settled on it. In addition, the direct breakthrough of water into the nozzle 7 is eliminated, which reduces the water consumption to remove sludge. The removal of sludge also favorably affects the property of a conoidal nozzle to draw in liquid and create zones of increased speed on the surface of the bottom of the housing 1.

The cap 10 provides transportation of the slime to the zone of influence of the annular conoidal nozzle. The device 4 for removing purified water can be made in the form of a water seal.

The hydraulic lock keeps the level of the liquid contact mass in the middle of the height of the conical part of the tank, forming a three-layer contact mass: liquid contact mass; mixed zone - a mixture of solid and liquid contact masses; hard contact mass.

In the first zone, the flow is distributed in thin streams and pre-coalescence of small particles of oil occurs. After this water with enlarged

oil particles pass into the second zone of the contact mass, where further coalescence takes place, interaction with the contact mass and flow distribution.

After passing through the third - liquid zone, where the oil particles are absorbed by the oil layer, the clarified water is discharged through the hydraulic lock 4, and the excess oil in the contact mass is taken through a special device - a nozzle 5 for removing the trapped oil, made perforated.

Claims (3)

1. A device for purifying water from oil products and mechanical impurities, including a housing, a coalescence chamber with grids between which a coalescing material is placed, nozzles for removing oil products and sludge and a device for removing purified water, in order to increase the efficiency of water purification and removal of sludge, the coalescence chamber is made in the form of a truncated cone, the grids are placed in the upper and lower bases of the cone, and the device for removing purified water is made in the form of a hydraulic lock. 2. The device according to claim 1, characterized in that the sludge removal nozzle is provided with a cap placed above it, having inward-curved edges, and a ring, located concentric pipe. 3. The device according to claim 1, characterized in that the device for removal of purified water is provided with a cylindrical conical screen and is made in the form of a hydraulic lock. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 262837, class B 01 D 21/10, 1968. Heipmb Water (Rig.1