SU998367A1 - Apparatus for purifying effluents - Google Patents

Description

(54) DEVICE FOR CLEANING WASTE WATER

The invention relates to the field of wastewater treatment and can be used in all sectors of the national economy, where wastewater containing petroleum products, fats and suspended weights is formed, as well as for the purification of biochemically treated domestic wastewater.

A device for wastewater treatment is known, including for | One above each other in the same housing is a quick filter and a flotation chamber, a chamber for introduction into the flotation fluid with pacTBOpeHH iM air placed adjacent to the flotation chamber and the rapid filter 13.

However, the presence of a separate chamber for introducing the air mixture and the source water requires additional space and complicates the operation of the facility. :

The closest to the technical essence and the achieved result-1 to the proposed is a device for wastewater treatment, including a high-speed filter placed above each other in the same housing and a flotation cell, source water supply unit, perforated pipes for

input water mixture and tray N. removal of C23 foam.

A disadvantage of the known device is the insufficient cleaning efficiency of the liquid from fats and petroleum products due to incomplete drying of the flotation product from the surface of the liquid into the main tray with fluctuations in the level of the liquid being cleaned during the cleaning process. In addition, the globular pipelines of the water – air mixture input are provided with dead ends, which do not ensure uniform distribution of the water – air smgsi over the cross section of the flotation chamber.

The aim of the invention is to increase the efficiency of cleaning the liquid by increasing the reliability of removing the flotation product from the liquid noBepxttoC and uniformly distributing the water / air mixture over the section of the flotation chamber.

The goal is achieved by the fact that a wastewater treatment device, including a fast filter and flotation keiler, feed water supply unit, perforated pipes for inlet of water-air mixture, il tray for exhaust, is equipped with foam collectors, the upper end of which is connected to a tray for foam removal, and the bottom one is placed in the foam collection chamber, with a floating groove installed with vertical movement along the chamber, the source water supply unit is equipped with a hydraulic elevator, and the perforated pipelines for introducing a water-air mixture are provided with vertical pipes, nozzles for extinguishing foam installed at the upper end of the pipes and horizontal pipes.

In Fig.1 schematically shows the proposed device, a longitudinal section; figure 2 - section A-L in figure 1.

The device consists of a housing 1, a flotation chamber 2, a filter 3, perforated pipelines 4, a water / air mixture inlet, an inlet, a water-inlet mixture pipe 5, a drain pipe system 6 for the filter, a pipe 7 for draining the filtered liquid, a water supply pipe 8 for the npONWBKy filter, a pipe 9 removal of flushing water, pipe 10 to enter the source fluid, nozzle 11, hydrosolator housing 12, pipes 13, pipeline collector 14, foam quencher nozzles 15, floating tray 16 of the chamber 17 for collecting foam, working pipe of the lift 18, air inlet pipe 19, nozzle 20, pipe 21, supplying air, a locking device on the air pipe 22, a locking device on the nozzle 23 of filtered water, a locking device on the nozzle 24 supplying water for washing the filter, a locking device on the nozzle 25 of the original liquid, horizontal nozzles 26, vertical nozzles 27, a pocket 28 for diverting wash water, a tray 29 for removing foam of the locking device “atrubka 30 of the source liquid, a locking device for patruks 31 of the water-air mixture.

The device works as follows.

Through pipe 10, the initial fluid enters under the residual pressure in the device for cleaning the fluid. The flow through the nozzle 11 into the body of the hydroslevator, the energy of the outgoing jet and the hydrozelevator diffuser provides additional suction of the fluid network of the flotation chamber and discharge of this liquid to the surface of the fluid being cleaned. The upper edge of the casing of the hydrozlevator is slightly flooded below the level of the fluid being cleaned. When exiting the hydrozlevator casing, the liquid forms a breaker-local elevation of the liquid relative to the steady-state level of the liquid in the flotation cell. The liquid particles on the local elevation flow down the surface of the breaker and tend to occupy the level of the steady surface of the liquid. Due to the difference between the heights of the highest point of the breaker and the horizontal surface of the liquid, the upper liquid layer is horizontally moved to the free side where the floating tray 16 is located.

Simultaneously with the movement of this fluid, a water-air mixture is introduced into the flotation cell ho of perforated pipes 4. Distributing throughout the entire cross section of the 1-positioning chamber, the water-air mixture moves upward against the flow of fluid directed to the filter 3.

The released bubbles of dissolved air, colliding with particles of petroleum products, attract them to themselves and float to the surface of the liquid. The resultant flotation layer (foam) resulting from this process is entrained by the horizontal overflow of liquid and is diverted to the floating tray 16 of the flotation product collection. The flotation product trapped in the floating tray is broken up with liquid, broken by the nozzles 15, and lowered into the chamber 17 to collect the foam and then with the elevator consisting of the working tube 18, the air supply pipe .19, the nozzles 20 are sent to the tray 29 to drain foam.

The economic effect is achieved by increasing the efficiency of cleaning the fluid.

Claims (2)

1. US patent 343359, cl. 210-199 1968. 2. USSR Author's Certificate No. 552305, CL. From 01 F 1/40, 1974.