SU582809A1 - Water-purifying filter - Google Patents

Description

one

The invention relates to filtration processes, namely, filters for purifying water for drinking purposes, and can be used for the purification of treated wastewater.

A filter for water purification is known, comprising a housing with a filter charge of inorganic materials, a distribution and drainage system.

In this filter, the purified water under

the action of gravitational forces is passed through, loading from top to bottom, collecting and withdrawing the filtrate from the zone below loading ij.

Due to the clogging of the load and a significant decrease in the filtration rate, the load is flushed with a stream of clean water in the direction of countercurrent flow when filtering, from bottom to top.

Such a filter requires high water consumption and has low productivity.

Closest to the present invention is a filter for water purification, including a tank filled with a filter charge, a water distribution tray, is placed

A collection of clean water in the end wall at the tank inlet, outlet trays, air distribution pipes and a drainage system 2.

The disadvantages of it are the high consumption of clean water for washing the filter loading with frequent stops of the filter, the complexity of the design of supporting drainage and the inability to use the filter to clean water with a high iron content.

The purpose of the invention is to save clean water by washing the granular load and ensuring continuous operation of the filter.

To this end, the filter is provided with a partition mounted vertically at the outlet of the tank, in which the drainage system is reinforced, and the air distribution pipes are located at the bottom of the tank under the filter loading.

FIG. 1 shows the construction of the proposed filter, a sectional view in FIG. 2 is the same, top view; in fig. 3 - section A-A of FIG. one.

The filter tank 1 has a distribution tray 2 on the inlet side

The front wall 3 and drain shelio 4., gdr connected to the raw water pipeline 5. On the output side, the filter is bounded by a partition 6 vertically installed at the outlet of the tank. A collector 7 of the filtrate is located behind the drainage wall. the filtrate is discharged into a storage tank. The volume of the filter tank is filled with a grainy load 9. The fencing walls around the perimeter of the tank 10 are drawn above the loading level, the edge of the overflow trough 11 is located below the level of the enclosing walls. The overflow side of the chute to discharge the wash water is raised above the loading surface. At the bottom of the filter are pipes 12 for supplying air to the purge load. A drainage system is fixed in the partition in the form of perforated drainage pipes 13 or other devices for draining the filtrate. The flow sections of the outlet openings of these devices are regulated by diaphragms, dampers, or other means 14.,

The filter works as follows

The raw water through the pipeline, 5 enters the distribution tray 2, flows out through the slit 4 into the load 9 and irochsed through the drainage system in a horizontal flow in a longitudinal direction with the same velocity at all points of the load cross section. The suspensions are adsorbed, and the purified water through the drainage enters the collector. 7. The equalization of velocities occurs due to the tray distribution of the flow in the beginning of the filter and the adjustment of the hydraulic resistance of individual sections over the area of the drainage system. When the filter is running, the level of water should not be above the loading surface. From the filter collection, water is discharged into the clean water storage.

When water is filtered through the charge, the suspension is adsorbed on the grains and accumulates in the pore space of the filter loading. With an increase in the resistance of the filter loading when it becomes clogged, the speed of the filter slows down, a need arises in the filter washing.

The filter is flushed through a vk6y loading with compressed air, which is fed down through the distribution pipes downwards without reducing the supply of raw water to the flash and the flash () process. After washing the water otvodltsk across the board into the outlet, when the level is popped at the load of 11 n .-, the air is mulched with air bubbles and air-breathing mixture is mixed. If the air is. give in such an amount, its bubbles will make up about 1O% of the volume of the load, then the level of air-to-air mixture rises approximately 8-9 cm by 1 m of initial height.

The filter of the proposed design in the type of tank with a load of granite rubble can be used for the deironing of feed water with an iron content of others 4 mg / l.

The use of combined loading of coarse-grained at the entrance to the tank and fine-grained at the drainage system allows to achieve a high effect of deferrization with the continuous operation of the filter and a small amount of clean water for washing the granular load.

For the filter of the proposed design, you can use the natural soil walls of the channel and its bottom.

To protect their ov from filtering the water into the ground, you can apply a plastic film and refuse monolithic or precast concrete.

The simplicity of phshhtra is widely used. It can be used for additional treatment of wastewater before discharging into reservoirs in order to use water for technical needs when feeding to a filter.

F o

rmula of invention

a filter for water purification, including a tank filled with a filter charge, a water distribution tray placed in the end wall of the tank in the tank, a collection of clean water, discharge trays, air distribution pipes and a drainage system, characterized in that, in order to save clean water, flushing granular loading and ensuring continuous operation of the filter, the latter is provided with a partition vertically installed at the outlet of the tank, in which the drainage system is strengthened, and air distribution pipes Located at the bottom of the reservoir under the filter loading.

Sources of information taken into account in the examination:

1, Austria Patent Ns 282493, cl. 85 p. 11, 10.15.69.

2, Patent of France No. 1334412, cl. At 01 D, 01.07.63.