RU2307075C2 - Device for purification of the water - Google Patents

Abstract

FIELD: chemical industry; devices for the reactant purification of the natural waters and sewage.

SUBSTANCE: the invention is pertaining to the field of the reactant purification of the natural waters and sewage. The device for purification of the water contains the cylindrical body with the conical bottom loaded in with the contact weighed mass, the pipe line of the water delivery for clarification, then ejector for the fine pulp feeding through the pipeline of the tangential feeding of the pulp into the upper part of the body, the diaphragm made in the form of the truncated cone, the prefabricated chute with the withdrawal pipelines of the clarified and the flashing waters, the conical thin-layer module, the semi-submersible cylinder, the compressed air ejector of the tangential injection of the fine pulp into the semi-submersible cylinder, the air separator, to the middle part of which the pipeline of the water feeding for clarification is connected, and in the lower part of which there is the dipping distribution pipe. At that the conical rings of the thin layer module are made with the diameters diminishing to the center and they are arranged on the same level. The semi-submersible cylinder is located inside the thin layer module outside the dipping distribution pipe, and the ejector for feeding of the fine pulp is connected to the lower part of the body of the device through the pipeline. The technical result of the invention is the increased efficiency of clarification of the water and flushing of the contact mass.

EFFECT: the invention ensures the increased efficiency of clarification of the water and flushing of the contact mass.

1 dwg

Description

The invention relates to techniques for the reagent treatment of natural and wastewater.

A device for water purification is known (RF patent No. 2183590, class C02F 1/52 // C02F 103: 02, publ. 06/20/2002, BI. No. 17 - prototype). The device contains a cylindrical with a conical bottom body loaded with contact weighed mass, a clarifying water supply pipe, a pulp ejector through a tangential pulp supply pipe to the upper part of the body, a diaphragm in the form of a reverse truncated cone, a collection chute with clarified and wash water discharge pipes, a conical thin-layer module, semi-submersible cylinder, air ejector of tangential pulp introduction into the semi-submersible cylinder.

The disadvantages of the design of the existing device are the possibility of destruction of the layer of suspended contact mass by air bubbles in the water coming to clarify the device, and the removal of suspended solids in the flakes of suspended water in purified water, the low efficiency of the thin-layer module to separate suspended particles not retained by the layer from the clarified water and small fractions of the contact mass from the wash water, insufficient efficiency of cleaning particles of the contact mass from the sediment in the field of centrifugal forces in the semi-submersible cylinder re, uncontrolled flow of contact mass into the pulp feed ejector during flushing.

The technical problem solved by the invention is to increase the efficiency of the known device for water purification when clarifying water and washing its contact mass.

To solve the technical problem, the device of the proposed design contains a cylindrical body with a conical bottom, loaded with contact weighed mass, a clarifying water supply pipe, a pulp ejector through a tangential pulp supply pipe to the upper part of the body, a diaphragm in the form of a reverse truncated cone, a collection chute with discharge clarified and wash water pipelines, conical thin-layer module, semi-submersible cylinder, air ejector of tangential pulp introduction into the floor a submersible cylinder, characterized in that it is equipped with an air separator, in the middle part to which a water supply pipe for clarification is connected, and in the lower part - a lowering distribution pipe, the conical rings of the thin-layer module are made with diameters decreasing towards the center and are located at the same level, and semi-submersible the cylinder is located inside the thin-layer module outside the lower distribution pipe, the pulp feed ejector is connected to the lower part of the device casing through the pipeline.

The stated technical task of increasing the efficiency of the device for water purification during water clarification and washing of its contact mass is solved by introducing new elements into its design - an air separator, in the middle part of which a water supply pipe for clarification is connected, a lowering distribution pipe connected to the lower part of the air separator, the pipeline connecting the ejector of the pulp supply to the lower part of the device body, the improvement of existing elements - conical thin-layer m Odul and semi-submersible cylinder.

The drawing shows a diagram of a device for water purification.

The device includes a cylindrical body 1 with a conical bottom, a contact weighed mass 2, a clarification water supply pipe 3, a collection chute 4, a clarified water discharge pipe 5, a wash water discharge pipe 6, a wash water supply pipe 7 to a pulp feed ejector 8, pipe 9 for feeding the pulp to the upper part of the body, a conical diaphragm 10, a pipe 11 for releasing a contact weighed mass from the device, a conical thin-layer module 12, a semi-submersible cylinder 13, an air ejector 14 tangential Input pulp semisubmersible cylinder air separator 15 connected to the water supply pipe to clarification, standpipe distributor pipe 16, a conduit 17 connecting the pulp feed ejector 8 to the lower part of the body casing.

A device for water purification works as follows. Through the water supply pipe for clarification 3, the source water treated with reagents is supplied to the air separator 15, which prevents air bubbles from entering the suspended contact mass layer, along the distribution lowering pipe 16, is evenly distributed over the area of the clarification zone of the device and passes upward through the contact mass layer 2 at a speed that allows it to be weighed. As the contact mass, quartz sand or any other fine-grained material that meets the requirements for mechanical strength and chemical resistance is used. By increasing the volume concentration of the solid phase in the suspended layer, autocatalytic acceleration of the coagulant hydrolysis process, contact coagulation of hydrolysis products, adsorption of metal hydroxides by grains of suspended contact mass and the formation of a precipitate in the layer, which itself is a sorbent for water impurities, occur. A part of the sediment flakes is carried out from the layer, is retained by the thin-layer module 12, slides down the inclined walls of its rings and settles on the surface of the contact mass. As a result, a high effect of water purification is achieved, a decrease in the consumption of reagents, and the productivity of the device is increased. The clarified water is collected by the chute 4 and is discharged by a pipe 5 from the device. After the protective action time of the weighed contact mass expires and the quality of the clarified water deteriorates, the contact mass is flushed in the following sequence. The valve on the drainage pipe for washing water 6 opens, and on the drainage pipe for clarified water 5 closes. Gate valves are opened on the pipe 17 connecting the pulp feed ejector 8 to the lower part of the device body and on the supply pipe 7 to the wash water ejector 8. The supply of clarified water through the pipeline 3 through the air separator 15 and the lowering pipe 16 into the contact mass 2 continues. Rinsing water is supplied to the ejector 8. The contaminated contact weighed mass in the form of pulp through a pipe 17 from the lower part of the device is sucked into the ejector of the pulp 8, transported to the upper part of the device through a pipe 9 and tangentially introduced into the semi-submersible cylinder 13 below through an air ejector 14 water level at an angle to its surface. The flow of contact mass into the ejector 8 is controlled by means of a valve installed on the pipe 17. Air introduced into the pulp using the ejector 14 is released into the water in the form of bubbles and a water-air washing of the contact mass occurs, enhanced by the separation of sediment particles and grains of the contact mass in the centrifugal force field in semisubmersible cylinder 13. The washed grains of the contact mass are deposited in the suspended layer, and the sediment is discharged with the used wash water. The removal of the contact mass in the collection chute 4 is prevented by a thin-layer module. After washing, the valves on the pipelines 17, 7, 6 are closed. At the same time, the supply of washing water to the pulp ejector 8 is stopped and the device continues to purify the water again. Contact weighed mass is used repeatedly during the cleaning process. If it is necessary to replace the contact weighed mass or empty the device for water purification, the pulp is discharged from it through a pipe 11.

The pilot plant included a water purification device structurally corresponding to the above drawing. The device was loaded with fine sand from crushed burned rock. High-color low-turbid river water, pre-treated with solutions of the coagulant aluminum oxychloride and the cationic flocculant Praestol 650 TR, was introduced into the device through an air separator, a lower distribution pipe, and, during an upward movement, weighed the contact mass layer. The air separator prevented the suction of air bubbles into the device and the violation of the stability of the weighed mass layer. When moving from bottom to top, water clarified in a suspended layer of the contact mass and in a thin-layer module. In this case, in the contact mass layer, the main part of the precipitate of aluminum hydroxide was formed and released from water, sorption of humus particles on the sediment, and water discoloration to a drinking norm. Part of the sediment, not retained in the contact mass layer, in the form of large dense flakes was released in a thin-layer module, flowed down and settled on the surface of the contact mass layer. The clarified water containing small flakes of sediment from the device came for final purification to granular filters. The use of the proposed device for water treatment allowed to reduce the total consumption of reagents by 30%, the duration of the inter-regeneration period of the filters was doubled. At the end of the two-day water treatment cycle, the contact mass was flushed in the upper part of the device with its transportation by the pulp feed ejector and tangential entry through the air ejector into the semi-submersible cylinder. Reducing the diameter of the semi-submersible cylinder in the device of the proposed design compared with the prototype design allowed to increase the efficiency of cleaning the particles of contact mass by increasing the centrifugal forces acting on them while reducing the radius of rotation of the liquid in the cylinder. The removal of the washed contact mass of the contact mass with the wash water was not observed. Flushing provided effective regeneration of the mass without the accumulation of residual contaminants in it. The presence of a pipeline connecting the pulp feed ejector to the lower part of the device body with a valve on it provided the possibility of controlling the contact mass entering the given ejector during washing, disconnecting and sanding the ejector itself and the tangential pulp feed pipe to the upper part of the housing after washing.

Thus, the design of the water purification device proposed by the invention allows to obtain a high effect of water clarification in the suspended layer of the contact mass and the thin-layer module, to perform effective washing and reuse the weighed contact mass, as well as reduce the consumption of reagents. In General, the solution of the technical problem of the invention is achieved - increasing the efficiency of the known device for water purification when clarifying water and washing its contact mass.

Claims (1)

A water purifier device comprising a cylindrical conical bottom body loaded with contact weighed mass, a clarification water supply pipeline, a pulp ejector through a tangential pulp supply pipe to the upper part of the housing, a diaphragm in the form of a reverse truncated cone, a prefabricated chute with bleed and discharge pipes wash water, a conical thin-layer module, a semi-submersible cylinder, an air ejector of the tangential introduction of pulp into a semi-submersible cylinder, characterized in that it is equipped It is defined by an air separator, in the middle part to which a water supply pipe is connected for clarification, and in the lower part a lower distribution pipe, the conical rings of the thin-layer module are made with diameters decreasing towards the center and are located at the same level, and the semi-submersible cylinder is located inside the thin-layer module outside the lower distribution pipe , the pulp feed ejector is connected to the bottom of the device body through a pipeline.