SU1224273A1 - Waste water purification plant - Google Patents

Description

The invention relates to the treatment of wastewater of small objects.

The purpose of the invention is to intensify the cleaning process and reduce energy consumption.

FIG. I shows a proposed wastewater treatment device, longitudinal section; in FIG. 2, a rotor assembly.

The device has an aeration tank 1 with aerators 2 and a supply pipe 3, a secondary settling tank 4, a bypass pipeline 5 between the aero tank and the secondary settling tank, a return pipe 6 of activated sludge. The secondary settling tank has a sludge pipe 7 with a valve 8, overlapping 9, which consists of a central pipe 10, a cone-shaped box 11, a cylindrical shell 12 and an inverted cone-shaped box 13. The overlap divides the settler into upper and lower chambers 14 and 15. The cone-shaped box 11 overlaps the large part of the settler section, the cylindrical shell is located down the periphery of the duct II and parallel to the walls of the settler, and the inverted cone-shaped duct 13 is parallel to the walls of the silt near the bottom, 15, Inside the central pipe, the deaeration pipe is coaxially installed on the pipe 16, the upper part of which is above the liquid level, the deaeration pipe has a nozzle 17 that is moved with the help of bolts 18, an adjustable slit 19 and a collecting chute 20 of silt, the upper part of which is above fluid level. A collection trough 20 of sludge is connected to a sludge return line 6. A cavitational aerator 21 is installed inside the deaeration pipe with an air intake pipe 22 and a rotor 23, at the bottom of which an axial pump 24 is fixed. The cavitation aerator is connected with a plate 25 with channels 26 fixed to the walls of the sump. . The adjustable slit 19 of the deaeration tube is at the level of the rotor 23 of the cavitation aerator. Between the upper and lower chambers 14 and 15

there is a slot 27. A collection tray 28 with a discharge pipe 29 is constructed in the upper part of the settler.

Wastewater treatment equipment

Water works as follows.

The original waste water through pipe 3 enters the aeration tank 1, from which the sludge mixture through pipeline 5 flows through the central pipe 10 into

the lower chamber 15 of the settling tank 4, When the aerator 21 is constantly turned on, the rotor 23 provides for the introduction of air oxygen, a part of which goes upward through a deaeration pipe,

and part is fed through an adjustable slot 19 into the lower chamber 15. An axial pump 24 provides water movement up the deaeration pipe 16. As a result of introducing air and moving water from the bottom up through the deaeration pipe, releasing the water-air mass through the slot 19 and entering it under the duct 11 into the bottom of the chamber 15 of the sump is stirring up

draft. The mixture before entering the discharge pipe 29 passes through the weighted filter of the chamber 15 and the upper clarification zone. Passing the weighted layer of the lower chamber 15, and the mixture through the slit 27 enters the upper chamber 14 of clarification. The cleaned fluid is collected by a collection tray 28 and discharged by a pipeline 29 from the structure. When adjusting the slit, which is made during commissioning, the nozzle 17, under the action of podimak tsykh water and air, forms the water level in the deaeration pipe

the level of water in the aeration tank. As a result, the activated sludge from the lower chamber 15 of the sump 4 rises through the deaeration pipe 16 and enters the collecting | Chute 20, from which it returns through the pipeline 7 to the aeration tank 1,

 When the cavitating aerator is disconnected periodically, sedimentation of the suspension to the bottom of the settling tank and excess active sludge occurs when the

gate valve 8 is removed from the system through pipeline 7.

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Editor V.Kovtun

Compiled by L. Sukhanova

Tehred V. Kadar Proofreader E. Sirohman

Order 1886/22 Circulation 864 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

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Claims (1)

DEVICE FOR WASTE WATER CLEANING, containing aeration tank and secondary sump, inlet, bypass and outlet pipes, a flooded cone-shaped box covering most of the section of the secondary sump, and a pipe for returning activated sludge to the aeration tank below the liquid level in it, characterized in that, for the purpose intensification of the cleaning process and reduce energy consumption, it is equipped with a central pipe attached to the upper part of the conical duct, an inverted conical duct with a cylindrical shell, p a deaeration pipe fixed to the bottom of the cone-shaped duct located along the axis of the central pipe and having a cavitation aerator with an axial pump ^ a gap is made in the deaeration pipe at the level of the aerator having a nozzle regulating its cross section, while the top of the deaeration pipe is located above the liquid level in the sump and has a collection sludge chute connected to the activated sludge return pipe, the bottom of the deaeration pipe is located below the inverted cone-shaped box, and the central pipe is connected to the bypass nym pipeline. 4 ^ Yu M co>