SU1741858A1 - Settling tank - Google Patents

Abstract

The invention relates to the field of industrial wastewater treatment, in particular, to discharging devices for settling tanks, and can be used in various industries that use the sedimentation method for manufacturing industrial wastewater of Fig L 2. The aim of the invention is to increase the reliability of the device by reducing the abrasive effect of the sludge at the interface between the parts of the discharge chamber and the pump. The device consists of a sludge collector 1 of a radial settling tank, the lower part of which is connected to the unloading chamber 2. The chamber 2 in the lower part is connected to the pressure pipeline 3, to which the transport pipeline 5 is connected. In the chamber 2 parallel to the pipelines a driving drum with longitudinal slots along the generators is installed and there is a gap between the walls of chamber 2 and the drum generator. When the sediment in the sludge collector reaches a certain level, the pump 4 is turned on. The clarified water supplying the clarifier water through conduit 3 and the drum drive. The sediment that filled the longitudinal grooves moves "" dey

Description

c from the sludge accumulator to the lower part of the discharge chamber and is washed out of the slots into the transport pipeline 5 by the incident flow of clarified water. Simultaneously under the pressure necessary

for hmdrotransportation of sludge, water washes the drum along the gap, reducing the abrasive effect of the sludge, and flows through the discharge chamber into the sludge collector of the sump, 2 sludge.

The invention relates to the field of industrial wastewater treatment, in particular to discharge devices for settling tanks, and can be used in various industries that use the sedimentation method for draining industrial wastewater,

For the treatment of wastewater of many industrial enterprises, for example, metallurgical production, radial septic tanks are used, in which sediment deposited on the bottom of the septic tank, having up to 97.5% of moisture, is shifted to the center. Next, the sediment through the sludge suction pipelines goes to the suction pumps located in the building of the slurry pumping station, which pump the sludge through the pipelines to a dewatering plant or to the sludge tank.

However, the transfer pumps due to the abrasive effect of the sludge quickly wear out and are worn out.

The closest in technical essence to the proposed unloading device is a device for discharging sewage and supplying sludge and a pipeline transportation system comprising a settling chamber connected to the discharging bin and the discharging tank through locking bodies. The discharge tank is in the form of a tubular tee connected to a pressure pipeline with a transporting medium and to a transport pipeline. 1 To the disadvantages of the known device

Reliability is low due to the increased wear of the mating parts of the locking bodies from the impact of the abrasive medium and the possibility of falling under the mating parts of a large fraction of sludge. In this case, due to the leakage in the sedimentation chamber, the process of desliming sewage is stopped. For reliable operation, the settling chamber must be kept under pressure equal to the pressure in the pressure pipe.

The aim of the invention is to improve the reliability of the device due to

reducing the abrasive effect of sludge on the contact points of the parts of the discharge chamber and the pump.

The goal is achieved by the fact that

the sump containing the sludge removal unit, made in the form of a sludge accumulator and a discharge chamber, in the lower part of the COR is dinanna with a transport pipeline, is equipped with a driving drum made with longitudinal grooves along a generatrix and installed in the discharge chamber with a gap to its walls parallel to the transport pipeline,

FIG. 1 shows a sump, common

view, longitudinal section, la fig. 2 shows section A-A in FIG. one.

The sump contains a node output of sludge, made in the form of a sludge tank 1 and the discharge chamber 2. In the lower part

an unloading chamber 2 is connected to a pressure pipe 3 connected to a pump 4 A transport pipe 5 is connected to a pressure pipe 3. The suction side of the pump 4 is connected

pipeline 6 with a chute 7 clarified water sump. In the discharge chamber 2 on the axle x 8 parallel to the pipelines 3 and 5 there is a driving drum 9 with longitudinal grooves 10 along the generatrix,

moreover, the drum is installed with a gap 11 to the walls of the discharge chamber. The size of the gap 11 is determined by a hydraulic calculation that determines the speed of the upward flow in the sludge collector 1

from the pressure pump 4 through the gap. In this case, the speed of the upward flow in the discharge chamber 2 must be ensured below the critical speed at which the pre-blistering state of the helmet occurs,

Shlamonzkopitel 1 is equipped with level sensors (not shown).

The device works as follows.

Industrial wastewater is treated by sedimentation in a radial sump. The sludge sediment deposited on the bottom of the settling tank is collected in the sludge collector 1. When the sediment in the sludge collector reaches a certain level, then the child (not shown) pump 4 and the drive

(not shown) of the drum 9. Sediment, which filled the longitudinal grooves 10 of the drum 9, moves from the sludge collector to the lower part of the discharge chamber 2 and is flushed out of the grooves into the transport pipeline 5 by the incident flow of clarified water from the pump 4. The transport pipe 5 slurry is delivered to the site further processing.

At the same time, under the pressure required for the hydraulic transport of sludge, water washes the drum 9 through the gap 11, reducing the abrasive effect of the sludge, and flows through the discharge chamber 2 into the sludge collector 1. The amount of upward water flow is limited by the size of the gap, for which it is necessary that the speed of the upward flow of water in the discharge chamber is lower than the critical speed at which a fluidized state of sludge sediment forms. When the sediment reaches a li-li level, a sensor (not shown) is

3

0

five

0

turns on the drum drive and after the estimated time turns off the pump in order to flush the transport pipeline.

The use of the proposed settling tank improves the reliability of operation in connection with a reduction in the abrasive effect of sludge on the interface of the discharge chamber and the pump. The proposed sump can be made open by continuously moving the sludge from a pressureless medium to a pressurized one.

Claims (1)

Claims of the invention: A settling tank containing a sludge removal unit, made in the form of a sludge collector and a discharge chamber, in the lower part connected to a transport pipeline, characterized in that it is equipped with a driving drum made with longitudinal grooves along the generatrix and installed to increase reliability in operation. in the discharge chamber with a gap to its walls parallel to the transport pipeline.