SU1675218A1 - Radial settling tank for separating sludge mixtures - Google Patents

Abstract

The invention relates to the purification of domestic and industrial ostomy waters and improves the separation efficiency of the sludge mixture and allocates the biologically active part of the sludge for circulation. The purpose of the invention is to increase the efficiency of separation of the sludge mixture. The essence of the invention is that in a radial settling tank containing a cylindrical tank 1 with a central inlet pipe 2 and a distribution casing 3 forming an annular gap with the wall of the inlet pipe, the lower part of the distribution casing is made gear with a tooth profile in the form of triangles. Along the periphery of the cylindrical tank 1, a catchment tray 5 with a pipeline 6 for discharging clarified water is installed, and in its central part there is a chamber 9 for collecting circulating sludge and a chamber 10 for collecting excess sludge, and suction pumps 12 and 14. The silt mixture enters the settling tank through the inlet pipe 2 and passes through triangular cuts, while circulating sludge passes through the top of the cuts, and excess, as the most severe, is lowered down. Next, the sludge is pumped by chambers 12 and 14 into chambers 9 and 10 and opened from the sump. 1 il. (L

Description

The invention relates to the treatment of domestic and industrial wastewater and can be used at aeration stations for biological wastewater treatment as secondary settling tanks.

The purpose of the invention is to increase the efficiency of separation of the sludge mixture.

The drawing shows a radial sump for the separation of the sludge mixture, θ vertical section.

The radial sump for separating the sludge mixture includes a cylindrical tank 1 for settling the sludge mixture, a central supply pipe 2, a distribution casing 3 mounted externally coaxially to the supply pipe to form an annular gap 4. A drainage channel 5 with a pipe 6 is installed on the periphery of the cylindrical tank 1 drainage of clarified water, and in its central part there is a sludge chamber 7 for collecting and discharging sludge, divided by a common cylindrical partition 8 ^ 5 into a chamber 9 for collecting and discharging circulation sludge and chamber 10 of excess sludge, moreover, the chamber 9 is equipped with a pipe 11 for discharging circulating sludge and communicated with peripheral sludge pumps 12, and the chamber 10 is equipped with a pipe 13 for discharging excess sludge and communicated with central sludge pumps 14. The sludge pumps 12 and 14 are secured by braces 15 on a rotating farm 16. The distribution casing 3 in its lower part is toothed with a tooth profile in the form of triangles, the height of which is (0.7-0.8) the depth of the casing under the level d (water.

The sump works as follows.

The flow of sludge mixture from aeration tanks enters the central supply d; pipe 2 in the annular gap 4, where it stabilizes in its upper part and acquires directional movement from top to bottom. When the toothed part of the distribution casing passes through the sludge mixture, it is inertially separated into biologically active (young) and dying (old) sludge, moreover, biologically active (young) sludge having a lower density is carried by the stream into the settling zone of tank 1 through the upper part of triangular cutouts distribution casing 3, and the dying (old) sludge containing a significant amount of mineralized particles, and therefore more dense, flows by inertia into the lower part of the annular gap 4 and is carried out Otoko zone in settling tank 1 through the lower part of the triangular cutouts distributor housing 3 and the sectional area of the gap between the bottom of the cylindrical tank 1 and the top of the teeth.

When sludge is deposited on the bottom of a cylindrical tank 1 under the action of gravity, it is further divided into biologically active (young) sludge, which has a lower density, enters the settling zone in its upper part and therefore settles in the peripheral zone of the cylindrical tank 1, and dies (old ) sludge, more dense, entering the settling zone at its bottom and therefore settling in the central zone of the cylindrical tank 1. The clarified water is then removed through the drainage channel 5 and pipeline 6.

When the Farm 16 is rotated by means of stretch marks 15, the suction pumps 12 and 14 are brought into rotation, while the settled biologically active (young) sludge is collected by peripheral suction pumps 12 and, under hydrostatic pressure, is discharged through the chamber 9 and the pipe 11 for the discharge of circulating sludge and then pumped into aeration tanks, and dying (old) sludge is collected by central sludge pumps 14 and through the chamber 10 and pipe 13 is discharged from the sump and then fed to the sludge treatment plant.

Thus, the implementation of the lower part of the gear distribution casing with the tooth profile in the form of triangles allows to increase the efficiency of separation of the sludge mixture due to inertial separation of sludge in the annular gap between the Central inlet pipe and the casing and reduce speed; sludge mixture entering the settling zone.

Claims (1)

Claim A radial settling tank for separating the sludge mixture, comprising a cylindrical tank with a central inlet pipe and a distribution casing mounted outside coaxially inlet pipes · '. <· Τ l and u h πιο and with I d in that, in order to increase separation efficiency sludge mixture cha'L lower distributor housing is formed with gear teeth about filem a triangle.