SU1722528A1 - Apparatus for clarifying water - Google Patents

Abstract

The invention relates to devices for the treatment of wastewater from suspended solids, oils, and can be applied in ferrous metallurgy, mechanical engineering, the petrochemical industry, and other branches of the national economy. The purpose of the invention is to intensify the process of water purification from suspended substances, oil products and poorly soluble hardness salts. The apparatus includes a housing with reaction and flocculation chambers and a settling zone. The reaction chamber is located between the conical, cylindrical and annular partitions, equipped with a scraper, a pipe for draining sediment into the flocculation chamber. A device for recirculating sediment is made in the form of an ejector and installed on the tangential pipeline for supplying source water. The settling zone is equipped with after-treatment chambers, which are formed by inclined plates, while the sedimentation zone and the upper part of the after-treatment chambers are equipped with shelf blocks. Nozzles for drainage of water and sediment from the post-treatment chambers are installed below the shelf units. 3 il. (Ls

Description

The invention relates to a device for the treatment of wastewater from suspended solids, oils and poorly soluble hardness salts and can be applied in the iron and steel industry, mechanical engineering, the petrochemical industry and other branches of the national economy.

The purpose of the invention is to intensify the process of water purification from suspended substances, oil products and poorly soluble hardness salts.

Figure 1 presents the apparatus, a general view; figure 2 - section aa in figure 1; in FIG. 3, node I, in FIG.

The device consists of a cylindrical housing 1, inside which a cylindrical partition 2 is placed coaxially. A partition wall 3 and a conical partition 4 are attached to the partition wall 2, forming a reaction chamber 5 and a flocculation chamber 6 with partition 2.

A water supply pipe 7 and a sludge recirculation unit 8 are located at the bottom of the reaction chamber 5. The device 8 for recirculating the sediment is made in the form of an ejector installed on the pipeline for supplying the source water.

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A nozzle 9 is installed on the annular partition 3 for transferring the sediment from the reaction chamber 5 to the flocculation chamber 6. The nozzle can be made inclined to the horizontal. A squeegee 10 is provided for transporting the sediment along the annular partition 3 to the nozzle 9. A sedimenting grate 11 is installed along the bottom flocculation along chamber 6. In the annular space between the housing 1 and the cylindrical partition 2, settling zones 12 are located with additional treatment chambers 13. The latter are formed by inclined plates 14 and partitions 15, forming an inclined bottom of the chambers. The settling zones 12 and the after-treatment chamber 13 are equipped with shelf blocks 16. Water after-treatment tubes 17 and sediment 18 are installed in the after-treatment chambers below the shelf blocks.

The nozzles 17 of the water outlet are connected to a catchment tray 19, which is equipped with a pipe 20 for draining water.

To collect oil products that float in the flocculation chamber and in the annular space above the settling zones 12 and after-treatment chambers 13, a scraper 21 and an oil pan 22 are provided.

The apparatus is equipped with a mechanism with a drive 23 and a central shaft 24, to which the sludge scrapers 10 from the reaction chamber 5 are attached, the scrapers for collecting oil products 21, the scrapers 25 for collecting sludge from the bottom. Pipeline 26 is installed at the bottom of the apparatus to remove sediment.

The fluid clarifier operates as follows.

Water containing suspended solids, salts of temporary liquid and petroleum products, by pipeline 7 for supplying water, flows tangentially into the lower part of the reaction chamber 5 through the annular partition 3, which gives the flow of water in the reaction chamber an intensive rotational motion. This creates conditions for the start of the process of flocculation of suspended solids, the formation and enlarging of hardness salt crystals. By using a device 8 for recirculating the precipitate, water is drawn from the flocculation chamber 6 into the reaction chamber 5. The placement of the device 8 for recirculating the precipitate in the lower part of the reaction chamber 5 provides suction of water from the zone of the flocculation chamber, where there are already formed sludge flakes, which, entering the reaction chamber, play the role of crystallization centers and intensify the processes occurring in it. A device 8 for recycling sludge

It is an ejector that uses the kinetic energy of a jet of water supplied to the apparatus for clarification. Using the ejection effect on

entering water into the apparatus increases the degree and constancy of the recirculation mode. The precipitate deposited in the chamber 5 of the reaction to the annular partition 3, the scraper 10 is transported to the nozzle 9 and along its inclined wall

enters the chamber 6 flocculation. The transfer of sediment particles from the reaction chamber to the flocculation chamber stimulates the flocculation process. Transferring the precipitate through the nozzle 9 avoids an undesirable flow of water from the reaction chamber 5 to the flocculation chamber 6 by using the ejection effect of water flow in the reaction chamber and the dynamic pressure of the flow in the flocculation chamber. The angle of inclination of the pipe 9 depends on the properties of the sludge and should ensure its spontaneous sliding along an inclined plane. The angle / 3 on the slope of the lower edge of the nozzle to the direction of water movement in the flocculation chamber is taken depending on the flow rate and ensures the creation of a hydrodynamic head from the side of the flocculation chamber.

Rotating water flow in chamber 5

the reaction moves in a spiral from the bottom up. Due to the trapezoidal section of the chamber 5, the speed of rotation of the flow is gradually slowed down. The location of the upper edge of the conical partition 4 below

The water level provides hydrodynamic conditions for a smooth transition of flow from the reaction chamber 5 to the flocculation chamber 6, where the movement of water continues in a spiral from top to bottom. In the flocculation chamber

consolidation and final formation of floccules of sediment occurs. The rotational movement of water in the chamber of flocculation ceases when the flow passes through the stilling grate 11. Water from the chamber

flocculation in the radial direction enters the annular space between the housing 1 and the cylindrical partition 2, passes through the settling zones 12, equipped with shelf blocks 16.

In the settling zone, the separation of suspended substances and oil products takes place. Sediment along the inclined planes of the shelving units arrives at the bottom of the apparatus. Floating oil products accumulate on the surface of the water in the upper part of the annular space.

Having passed through the settling zones 12, the water flow changes direction and, moving from top to bottom, enters the after-treatment chambers 13, passes through the system of the shelf blocks 16 and is directed through the pipelines 17 to the catchment tray 19, from which the pipeline 20 goes to limits of the apparatus. Equipping the cleaning chamber 13 with the system of the shelf units 16 allows the flow velocities to be evenly distributed and the laminar mode of water movement in the device is organized, which eliminates the ingress of floating oil into the clarified water.

The oil products that float up in the annular space and in the flocculation chamber, using a scraper 21, are collected in an oil pan Tray 22 and removed from the apparatus.

The bottom sediment is scraped off by means of scrapers 25 and conduit 26 from the apparatus.

Thus, the proposed liquid clarifier makes it possible to intensify the purification of wastewater from suspended solids and oils, and is reliable and productive in operation.

Claims (1)

The invention The apparatus for clarifying water, comprising a housing with cylindrical and conical partitions coaxially arranged in it, reaction and flocuplpi reaction chambers, a settling zone, a pipeline for supplying raw water, drainage units for purified BOLY, oil products and sediment, This is due to the fact that, in order to intensify the process of water purification from suspended solids, oil products and poorly soluble hardness salts, it is equipped with an annular partition connecting the cylindrical and conical partitions in their lower part, between which there is a reaction chamber, a scraper and a pipe for discharging sediment located in the reaction chamber, placed in the defending zone by post-treatment chambers, made in the form of inclined plates, connected in pairs in the lower part by partitions, and having water discharge pipes and sediment, shelf blocks installed in the settling zone and in the upper part of the after treatment chambers, with this pipeline supplying the source water is tangentially located in the lower part of the reaction chamber and is equipped with a device for recirculating sludge, made in the form of the ejector, and the upper edge of the conical partition is located on the level between the upper and lower ends of the shelf units of the post-treatment chambers.