SU1404093A1 - Arrangement for automatic unloading of settling tanks - Google Patents

Abstract

The invention relates to the separation of heterogeneous mixtures by settling. The purpose of the invention is to improve the quality of the separation of the suspension by clearly defining and controlling the sludge boundary of the clarified liquid in the sump when it is being emptied. The device consists of a tank-sump 1 with an additional chamber 2. A telescopic nozzle 6 is placed with the possibility of vertical movement in the nozzle 4 for draining the clarified liquid. The elastic conical plug 3 is fixed on the chamber wall and enters the nozzle 6 when the latter is in the uppermost position. The movement of the nozzle 6 is performed by a pinion gear 1m by a reversing drive 11, which are interconnected by an L-shaped frame 8 and legs 7. On the levers 14 attached to the L-shaped frame, an emitter 15 and a receiver 16 of a gamma relay are installed. The upper and lower levels of the medium in the sump are monitored by sensors 19 and 20, respectively. After the settling tank is filled with the suspension and after a predetermined break time, an actuator is activated, which lowers the telescopic nozzle to the level of the interface between the sludge and the clarified liquid, determined with a gamma relay, which commands the pump that pumps the clarified liquid. When the upper level of the clarified liquid and its interface with the slurry approach, the pump for removing the clarified liquid is turned off and the nozzle 6 is returned to its original position, in which it is closed by the stopper 3. At the same time, the pump is turned off to remove the sludge, which is turned off by a signal from the sensor 20. 2 silt (O (L; o

Description

The invention relates to the field of separation of heterogeneous suspensions.

The purpose of the invention is to improve the quality of the separation of the suspension by clearly defining and controlling the boundary between the sludge and the clarified liquid in the sump when it is emptied.

Figure 1 shows the device, a longitudinal section; figure 2 is the same, top view.

A device for automatic unloading of settling tanks contains a settling tank 1 with a chamber 2 in which a cone-shaped elastic is fixed: a plug 3 and a discharge nozzle 4 connected to a pump 5 for pumping out liquid.

In the outlet nozzle 4, a telescopic suction nozzle 6 is moved, attached through rods 7 to an L-shaped frame 8, on which there is a rail 9, which engages with gear 10 of drive 11, mounted on platform 12, to which guide pins 13 are attached. The L-shaped frame 8 has an enclosing chamber 2, levers 14, on one of which a radiation flow source 15 is installed, and on the other a density sensor emission flow receiver 16 constituting a gamma relay.

The upward movement of the L-shaped frame 8 is controlled by the end switch 17, which is supported by the stop 18.

The tank-sump 1 is equipped with sensors of the upper 19 and lower 20 levels. Sludge is pumped through pipe 21.

The device works as follows.

The settling tank 1 enters a solution of any mixture of liquid and solid particles to the level monitored by the upper level sensor SUS 19.

In the initial position, the telescopic suction port 6 is in the upper position and is closed with a cone-shaped elastic stopper 3, which prevents solid particles from entering the pump 5 for pumping out the clarified liquid. After a predetermined time of separation of the suspension, a command is issued to turn on the actuator 11, which, through gear 10, which engages with the rack 9, lowers the L-shaped frame 8, which moves along the guide pins 13, fixedly attached to the platform 12. Together with the L-shaped The frame 8 also lowers the telescopic suction nozzle 6, mounted on the hooks 7, the entrance to the inside of the outlet nozzle 4. Installed on the levers - 14 gamma relay, consisting of the source 15 and the receiver 16, during the downward movement controls the density of the medium in the chamber and the tank -stand ke 1.

When the sludge layer reaches the bed, the density sensor gives a command to stop the drive 11 by switching its engine to reverse and start the pump 5 in order to remove the clarified liquid through the telescopic suction nozzle 6 and the nozzle 4.

As the level of the clarified liquid is lowered, its boundary with air reaches the zone in which the density of the medium is controlled by source 15. As a result of the received signal, the pump 5 is stopped. At the same time, a command is given to pump the sludge through pipe 21 and turn on the drive P, which, being switched to reverse, raises the entire system to its original position. The stop of the L-shaped frame in the upper position is made by the limit switch 17 on which the stop 18 hits. In this case, the cone-shaped elastic plug 3 tightly closes the inlet of the telescopic suction nozzle 6. The pump is stopped; connected to the pipeline 2J, is produced by the command of the sensor 20 of the lower level.

The proposed device is easy to manufacture, effectively, allows automatic cleaning of the settling tanks separately according to the phases of the contents.

Claims (1)

Invention Formula A device for automatic unloading of settling tanks, containing a tank-settling tank, level sensors, pipelines for removing sludge and clarified liquids, and a gamma relay, characterized in that By clearly defining and controlling the boundary between the sludge and clarified liquid in the sump when emptying it, it is equipped with an additional chamber, filled in the side wall of the sump, with a telescopic elbow for outputting the clarified fluid, vertically completed, with a conical elastic stopper for closing the telescopic elbow in extreme top position fixed on the wall of the chamber, a platform with a rack and pinion gear drive mounted on it, mounted outside the chamber, an L-shaped frame moved by a drive connected to the telescopic pipe connected to the horizontal levers covering the chamber on which the gamma relay is located, focus mounted on the L-shaped frame, interacting with the limit switch actuator. FIG.