SU969286A1 - Hydrocyclone and settling apparatus - Google Patents

Description

(54) DRAIN HYDROCYCLONE

one

The invention relates to structures for the mechanical treatment of wastewater and can be used to purify rainwater and snowmelt water discharged from industrial sites, as well as for the treatment of stormwater in conjunction with industrial effluent at a general drainage system.

Stormwater, for the purification of which the structure is intended, is characterized by the frequency and high rate of occurrence of runoff, irregularity and rapid increase in costs, the elevated content of materials and floating inclusions.

Due to the fact that special facilities for cleaning stormwater are not sufficiently developed to date, purification of these waters is usually carried out by known devices designed for an even flow of effluent at an estimated flow rate that is incommensurably smaller than the amount of storm water to be treated. In the practice of industrial plants, horizontal and radial clarifiers, as well as clarifier ponds, are usually used to clean surface runoff and storm water.

Storm sewer systems also have the following feature. Due to the large extent of storm water collectors, they tend to have significant burial (about 6–8 m below ground level), which necessitates pumping drains to feed them to known devices, and the power

The 10 pumping stations, drainage collectors and, consequently, purification devices should guarantee the passage of maximum, peak flow rates of storm water. It should also be noted that since the territory of industrial enterprises is usually limited, and large areas are required to accommodate treatment facilities, it is often necessary to place structures for the treatment of storm water outside the sites of industrial enterprises.

2Q All of the above leads to high capital costs for creating a system for the discharge and treatment of storm water. The closest to the proposed technical essence and the achieved result is a hydrocyclone-settling tank, comprising a housing, coaxially arranged partitions forming centrifugal chambers and gravity clarification, a tangential branch of the clarified water supply and a peripheral catchment stream 1.

A hydrocyclone-settler is characterized by good clarification efficiency, but does not have a reserve volume for receiving high-intensity storm water. In addition, it is difficult to solve the task of collecting floating impurities (chips, branches, paper, etc.) present in storm waters in this settling tank. Installing the grating to hold these inclusions to the stand, as is the practice, leads to clogging of the inlet manifolds and emergency overflow of the network.

The purpose of the invention is to ensure efficient operation of the sump in conditions of uneven flow of storm water, as well as to increase the efficiency of wastewater treatment from floating impurities.

The goal is achieved by the fact that a hydrocyclone-settling tank, comprising a housing, coaxially arranged partitions forming chambers of centrifugal and gravitational clarification, a tangential branch pipe for supplying responsive water, and a peripheral catchment tray, is equipped with an additional external tank, a receiving funnel with a storm sewer branch pipe installed. a centrifugal clarification chamber, a mesh box installed in an additional tank under the storm water discharge pipe and an overflow pipe connecting the lower parts of the centrifugal clarification chamber and the additional tank.

In this case, the body is made with a square section.

FIG. 1 shows a hydrocyclone-settler, a plan view; in fig. 2 shows section A-A in FIG. I; in fig. 3 shows a section BB in FIG. one; in fig. 4 - sump with a square cross-section of the outer shell, view in plan.

The hydrocyclone-settling tank has an outer casing 1 with a storage chamber 2 and a peripheral, protected from above floating substances, tray 3, center plate 4, chamber 5 of centrifugal lightening formed by wall 6 of central center and cylindrical partition 7 with an expanding mouth 8 which forms with an outer casing, a gravity clarification chamber 9. A nozzle 10 extends into the centrifugal clarification chamber for the tangential supply of wastewater to be cleaned.

A grab 11 is provided for cleaning the sump, and oil collecting devices 12 are provided for collecting oil. At the top of the chamber

5, centrifugal clarification is provided with a hopper 13 of square section. The funnel enters pipe 14, through which storm water flows to a tank 15 located outside the tank.

At the end of the nozzle extending into the vessel, a mesh box 16 is installed to retard the floating impurities. In the lower part of the centrifugal clarification chamber, there is a second branch pipe 17 connecting it with a container 15 and having a locking device 18. The drainage of clarified drains from the trays 3 is carried out via pipeline 19 with a locking device 20.

Sewage works as follows.

During the period of rainfall, rainwater flows through the tangential pipeline 10 into the centrifugal clarification chamber 5, where they pass the first cleaning stage of large inclusions and, under the socket 8, enter the gravitational clarification zone, into the clarified water tray 3. Further, as the storm water flow is received, the upper part of the settling tank is filled to the level of the receiving funnel 13, through which

nozzle 14 is diverted to storage tank 15. In this case, in the zone of centrifugal clarification, as a result of the flow directional funnel directed towards the side, the floating

on the surface of the inclusion, which is then retained by the mesh box 16 placed at the outlet end of the nozzle 15 of the container.

After termination of the shower, the sedimentation tank is released from the water evenly.

to the level of the peripheral tray. The settling time and the flow rate of the water are regulated by the locking device 20. Next, the water in the tank 15 is cleaned. To do this, the locking device 18 is opened and the drains through the nozzle 17 enter the centrifugal clarification chamber, go down and under the expanding socket 8 pass into a gravity clarification chamber 9, from which it is drained into the peripheral tray 3.

Floating impurities trapped in the screen box 16 are periodically removed from it. To this end, the box using lifting devices removed from the place, freed from the contents and re-installed in the tank.

Claims (2)

The silty sediment that falls out in the tank 15 periodically between the rains is washed into the sump by means of pressure flow from the hoses or perforated pipes specially installed for this purpose into the sump. In this case, the sump is pre-emptied. Emptying the sump needs to be done after each rainstorm. The proposed hydrocyclone-sedimentation tank makes it possible to accumulate storm runoff during the period of heavy rains and clean it in the settling basin gradually after stopping the rain for a longer time. Thus, a reduction in the size of facilities required for water purification and their transfer to further use or discharge, and, consequently, a significant reduction in the cost of these facilities, is achieved. The device is convenient, simple and efficient. Its application provides purification of storm water from floating impurities (chips, etc.) by draining them into a mesh box placed in a tank. The hydrocyclone-settling tank can be placed directly on the plant site. In this case, savings are achieved in the capital costs that are required for the installation of pipelines that discharge the wastewaters to be treated from the plant to the treatment plant. The cost of complete cleaning of 1 m of surface runoff water with the proposed device is 15–35% cheaper. The high economic effect is the result of combining in one structure: the first stage of cleaning from large inclusions; the second stage of purification from fine impurities; cleaning of floating impurities and oil products. Two-stage purification of rainwater, makes it possible to use the device for industrial needs. Thus, the task of the drainless scheme of water use in the industrial enterprise is being solved, which meets modern requirements and the task of protecting surface water from pollution. Replacing the round section of the outer casing with a square one does not adversely affect the quality of the clarification, since the gravitational clarification chamber operates on the principle of a vertical settler, in which the clarified water flow is directed upwards. The sedimentation of sediment occurs under the action of gravitational forces. The use of a sump with a square cross-section of the outer casing not only improved its layout with a reserve tank having a rectangular cross-section, but also provided a more successful blocking of all four settlers. Claim 1. Hydro-cyclone-settler, comprising a housing, coaxially arranged partitions forming chambers of centrifugal and gravitational clarification, a tangential nozzle for supplying water clarity and a peripheral catchment tray, characterized in that the arrival of storm water, it is equipped with an additional outer tank, a receiving funnel with a storm drain pipe installed in the centrifugal clarification chamber, a mesh box They are installed in an additional tank under the branch pipe of the storm water runoff and with the overflow pipe connecting the lower parts of the centrifugal clarification chamber and the additional tank. 2. The hydrocyclone-settler according to claim 1, characterized in that the body is made with a square section. Sources of information taken into account in the examination I. USSR author's certificate jYo 701951, cl. C 02 C 1/26, 1977 (prototype). / L