SU962210A1 - Apparatus for accumulating and purifying rainfall water - Google Patents

Description

(54) DEVICE FOR ACCUMULATION

AND CLEANING OF RAIN DRAIN RENOLS

one

The invention relates to the purification of liquids containing suspensions, including petroleum products, and to be used at industrial sites in all sectors of the national economy for the purification of rain and thawed wastewater.

The closest to the invention with the technical essence and the achieved result is a device for accumulation and purification of rainwater drainage, including a pre-clarification chamber, oil recovery and oil collector devices, inlet, distribution, drainage and discharge pipelines with stop-regulating equipment, a flotation chamber with overflow pipes, sectional sump and sloped plates installed with clearance 1.

The disadvantages of this device are low intensity of use of the structure and insufficient efficiency of cleaning the rainwater runoff, since the structure relies on ensuring the purification of the calculated discharge flow and works on the principle of a sump-displacer, i.e. per unit of time, from the sump should be poured out as much as in it, be. As a dragon, rainwater runoff to wastewater treatment plants occurs with a large second flow rate and low productivity over time — therefore, to use such a device for cleaning rainwater flow even without increasing the cleaning efficiency, additional

10 a device for pre-accumulating the runoff and subsequently dosing with a constant flow rate, when applied to the treatment plant.

5 Cleaning from oil products and suspensions in the drive structure does not meet modern requirements, since cleaning from oil products by the process of settling

20 only retains oil particles with a particle size of up to 80 microns, which is up to 85% of the total content of petroleum products. With an initial oil content of 200 mg / l, the residual oil content will be up to 30 mg / l.

The purpose of the invention is to increase the efficiency of cleaning rainwater flow j and intensify the use of the volume of the structure.

This goal is achieved by the fact that the device for cleaning and accumulation of rainwater runoff, including the pre-clarification chamber, peftesgon and oil-collecting devices, supply, distribution, drainage and removal of uUie piping with shut-off control equipment, the flotation chamber with transducers, sectional section, section section and section section, sectional control equipment, sectional flotation chamber with transducer, sectional control, sectional control equipment sloped plates installed with a gap, a device supplied with a receiving chamber and a trash grate placed in it, the flotation chamber is made in the form of trays, communicating with CRC E settler overflow pipes snabdeol: - regarding the aerators bottom. ,, h ;; ь;, 1 isa the entangled image is sent: -: ts si ;; 5; It has been exchanged in drainage devices with zigzag bottoms in the top and bottom of the zigzag bottom, while the immersions are installed between the pre-lighting and flotation chambers i

The implementation of the bottom of the settling section and the preliminary settling zone when placing drainage devices at the tops of the zigzag bottom helps the sediment to slide into lower bottom points. In connection with this, the filtering layer of drainage devices is not subject to qualification, which is very important for their operation, especially since drainage devices are activated at the end of the settling process.

FIG. 1 shows the proposed device, a plan view; in fig. 2 is a cross section A-L in FIG. 1. It consists of sections of a sedimentation tank 1 with an artificial base, equipped with a drainage device 2, a rainwater pre-clarification zone 3, oil recovery and oil removal devices 4 and 5, blocks 6 of inclined plates (or cellular structures, flotation chambers 7, equipped with tubular aerators 8; overflow and emptying (M nozzles 9-11, trash partition walls-grates 12, nozzles 13, inlet id wash water, lamp wells 14, nozzles 15, supplying rainfall runoff of the receiving chamber 16 rainwater runoff, patr bkov 17 OTVODYA1CHIH rainwater drain devices from entry bystrorazbiraemyh blocks 18.

The proposed device works as follows.

The rainwater flows through the supply pipe or pipe 15, is directed to the receiving chamber 16 and, after passing through the partition-grid 12, heats up the energy of the fluid flow and trash collection, enters the pre-brightening zone 3, accumulates in it by volume, is cleaned from suspended matter by 00-90% and when a certain level is reached, they pass through blocks of 6 thin-layer plates or cellular structures into the flotation chambers 7 equipped with tubular aerators 8. The flotation product is collected on the liquid surface of the chambers 7 and free The space between the plates of the block b, unfilled with the rain drain, flows into the pre-brightening zone 3 and is distributed over the surface of the liquid in it. From the flotation chambers 7 through the overflow pipes 9, the rainwater flows into the accumulation sections of the sump 1 for final settling and filtration through the bottom drainage devices 2. The rainwater settled and filtered through the devices 2 is diverted through the pipes 17 to the appropriate sewage network through the chamber equipped with float or some other device providing the required mode of operation (filtering).

Emptying the device for cleaning the rainwater runoff and, consequently, cleaning the ocyl cell ect for a predetermined time (no more than 24 hours), the indicated time allows the drainage device 2 to be relieved of excessive intensity both by the flow rate of the liquid being cleaned and by the filter capacity.

Suspensions suspended in the process of settling in the cumulative sections of the sump itself accumulate in lower parts of the base and do not fall on the filter of the drainage device 2 when the volume of the storm drain is fully activated, thus reducing the need for a larger drainage device capacity.

At the end of the rainwater discharge from the accumulation sections of the settler, the drainage devices 2 P1) are washed with a reverse current of clean process water supplied from the water pipeline of the industrial site through the branch pipes 13

The sediment selected in the areas of the settling tank, as well as the pre-clarification zones, is dried by direct sunlight and wind exposure, under natural conditions and after a certain time is unloaded by mechanisms. In order to facilitate the entry of mechanisms to the sites of the settling section;, fast-disassembling blocks 18 are provided for in its construction.

Upon the termination of the inflow of the drainage flow to zone 3 and the emptying of the settling sections, in the zone of preliminary clarification, a certain separated level of rainwater remains at the height of the overflow edge of the lower inclined plate of the block 6. On the surface of the water of this zone a layer of oil products is separated, which is removed using oil-free and oil removal devices 4 and 5.

After removing the oil layer, a shut-off device opens in line 17 and the remaining liquid volume of zone 3 is filtered through a drainage device. Further preparations for the preparation of this zone for the next round of the work cycle are similar to those described for the settling sections.

The proposed device has an increased efficiency of cleaning of rainwater runoff due to the introduction of additional processes for the purification of rainwater flotation and its filtration through a filter and drainage device. The degree of purification of rainwater runoff was brought to suspension indicators 3-5 mg / l, oil products 1-2 mg / l. Purified waste water can be used for various industrial and household purposes.

Intensification of work has been achieved due to fuller utilization of the facilities. All zones and sections of the structure initially perform the functions of an accumulation tank, and then work as structures that provide for the cleaning of rainwater runoff.

These advantages of the proposed device provide. The required efficiency of cleaning the rainwater flow without significant changes.

capital and operating costs.

Claims (1)

1. Modern septic tanks. Water treatment systems. Review information, matsi, TSINTIHIMNEFTENASH. M., 1974, p. 35-36. til- j jl