SU1606152A1 - System for controlling drum gauze filter - Google Patents

Abstract

The invention relates to control systems for drum mesh filters used in wastewater treatment. The use of the system will improve the reliability of its operation and reduce the specific metal content of the structure. The control system comprises an inlet pipe 1, a drum 2 with filter elements and a pinwheel 4 connected to the actuator 7, a washer with a controlled valve 15, an elastic corrugated pipe 16 connected to the measuring tank 17 and to the inlet pipe 1, a bracket 20, bolts 21, grooves 22 of bracket 20, intermediate plate 23, level sensor 18, scale 24, pressure plates 25, screws 26, position sensors 27 and 28, additional position sensor 29, sensing elements 30-32, drum 33 control unit 33 and valve 15, control unit 34 The actuator 35 of the locking device 36 supplying the filtered liquid, the device 37 and 38 of the sound and light alarm, the filter chamber 40 and the lead 45 with the hinge 46. 1 Cp. f-ly, 3 ill.

Description

scale 24, attachment strips 25, screws 26, position sensors 27 and 28, additional position sensor 29, sensing elements 30-3, drive control unit 33 of drum 2 and valve 15, control unit 34.

the actuator 35 of the locking device 36 for supplying the filtered liquid, the devices 37 and 38 of the sound and light alarm systems, the filter chamber 40 and the lead 45 with the hinge 46. 1 Cp f-ly, 3 ill.

The invention relates to control systems for mesh-type drum filters and can be used in the water treatment of wastewater.

The purpose of the invention is to increase the reliability of the system and reduce its specific metal consumption.

FIG. 1 shows a mesh drum filter installed in the filter chamber, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a control system for a screen drum filter.

The control system comprises an inlet pipe 1, a drum 2 equipped with filter elements 3, a pinwheel 4, sliding bearings 5 and 6, on which the drum 2 with the pinwheel 4 that is engaged with the drive 7 of the drum 2 is mounted and rotated 8 and 9, a drainage pipe 10 with a receiving funnel 11 and a lid 12 connected to the inlet pipe 1 by means of a bit 13, a washer 14 with a controlled valve 15 mounted on racks 8 and 9. The inlet pipe 1 is connected to an elastic corrugated tube 16, second end which is connected to the measuring capacitance 17 of the level sensor 18 mounted on the float 19.

Inside the measuring tank 17, a bracket 20 is installed with threaded holes for bolts 21, with the help of which through grooves 22 it is possible to vertically move an intermediate plate 23 with an indicator scale 24, to which sensors 27 and 28 are fixed with clamping strips 25 and screws 26 additional position sensor 29, sensitive elements 30, 31 and 32 of which are mounted on the corresponding marks of the scale 24. Sensors 27

and 28 positions are connected to the control unit 33 of the drive 7 of the drum 2 and the control valve 15. An additional sensor 29 is connected to the control unit 34 of the drive 35 of the shut-off device 36 for supplying the filtered liquid, the device 37 for the audible alarm and the device 38 for the light signaling.

The treatment plant consists of an underwater channel 39, a filter chamber 40 with a concreted base 41 and an outlet channel 42. The filter chamber 40 is separated from the underwater channel 39 by a wall 43, and from the outlet channel 42 by a wall 34. Sensor 18 is connected to the filter

camera 40 by a leash 45 with hinges 46, which provide vertical movement of the sensor 18 when changing the water level in the filter chamber 40.

The control system works in the following way.

The contaminated water enters the underwater channel 39 and from it through the inlet pipe 1 fills the cavity

drum 2. Through the filter elements 3, filtered water seeps into the filter chamber 40. The underwater channel 39 and filter chamber 40 are filled until the water level reaches the top mark of the wall 44. At this point, the control system is adjusted, for this purpose manually signal to block

34 of the control, which turns on the actuator 35, shutting off the water into the inlet pipe 1 with the help of the locking device 36. In so doing, the water level in the filter chamber 40,

the cavity of the drum 2 and the measuring capacitance 17 is the same. The sensors 27, 28 and 29 of the position are secured on the intermediate njiacTiinR 23 with the help of clamping gig rods 23 and screws 26 and 5160

KIM so that the sensitive element 30 of the sensor 27 of the position was set at the level of the scale 24, located from the end A at a distance equal to the minimum value of the differential Uh i rtviH 3 filter element X 3, which corresponds to the hydraulic resistance of the uncontaminated filter elements 3, and sensitive the element 31 of the position sensor 28 should be set at the level of the boxes 24 located from its lower end at a distance equal to max max the difference allowed during filtering when rinsing is required iltrovalnyh elements 3.

The sensing element 32 of the additional sensor 29 is positioned at the level of the scale 24, corresponding to the emergency differential Ljd, when further work without taking emergency measures is impossible, which corresponds to the emergency mode. After the sensors 27, 28 and 29 are fixed, the intermediate plate 23 is fixed by the grooves 22 in such a way that its lower end touches the water surface and the measuring capacitance 17, and is fixed to the bracket 20 with bolts 21. ready to go.

A signal is then manually supplied to control unit 34, which turns on a drive 35, which opens water in the inlet pipe 1 with the aid of a locking device 36.

With a further increase in the water level to h (in the underwater channel 39 and the drum 2, the hydraulic resistance of the filter elements 3 in the filter chamber 40 is set at a slightly lower level h equal to the sum of the height he of wall 44 and the height of the weir crest Db. the filtered water flows through the wall 44 into the bypass channel 42 and from there flows into further processing. In this case, the water is filtered through the filter elements 3 under the action of a pressure drop (ih), which x 3 elements increases from A L, q before;. In a measuring container 17 the water level is a water level in the drum 2. In contact with water chuvstvitel152

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The control unit 33 activates the actuator 7 and 7 opens the controllable valve 15. The reel begins to rotate and at the same time the washing device 14 starts to operate, under the action of which the sediment deposited on the walls of the filter elements 3 from the inside of the drum 2, it is washed off and into the receiving funnel 11 and out of it through the pipe 10 is discharged into the sewer. As the filter elements 3 regenerate, their hydraulic resistance decreases, and, consequently, the Lh drop decreases. When the differential DB to D. decreases, the VSS element 30 of the position sensor 27 loses contact with water and with the help of the control unit 33 the drive 7 is turned off and the control valve 15 is closed. The drum 2 is stopped and the washer 14 is turned off. The filtering elements 3 are completely regenerated,

If during the flushing process the hydraulic resistance of the filter elements 3 does not decrease and the pressure differential continues to increase, then when an emergency differential is reached, the sensitive element 32 of the additional sensor 29 comes into contact with water and, using the drive control unit 34, the locking device 36 stops the flow of filtered liquid inlet pipe 1. At the same time, the sound device 37 and the light signal device 38 are turned on, indicating the emergency operation mode.

After regeneration of the filter elements 3 and, if necessary, emergency work to achieve the nominal differential ih, the devices 37 and .38 are turned off, with the help of subdire 35, the locking device 36 is opened and the screen drum continues to operate in the described order.

With a change in the magnitude of the drop, the productivity of the mesh drum filter changes, which leads to a change in the height of the ridge of the weir Dbs and the level in the filter chamber b. To measure the actual value of the differential value Db on the filter elements 3 with a change in the level of ha. the float 19 moves the gauge

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Claims (2)

Claim 1. Control system Mesh drum filter containing a filter chamber, a drum with filter elements mounted on the inlet pipe for rotation from the drive, a washing device of filter elements equipped with a controlled valve, a shut-off device for supplying the filtered liquid, a liquid level sensor made as a float with sensors attached to it, and a control unit whose inputs are connected to the outputs of the liquid level sensor, and the outputs are shut-off with drives device and the drum and with a controllable valve of the washer, characterized by 39 7 8 47 13 12 10 6 9 12 FIG. 7 Wash water supply By the fact that, in order to increase the reliability of the system and reduce its specific metal consumption, the control system additionally contains an elastic corrugated tube and a leash with a hinge that connects the filament chamber with the liquid level sensor, and the liquid level sensor 10 is provided with a measuring capacitance connected through an elastic corrugated tube with an internal cavity of the drum inlet pipe. 2. The system of claim 1, in accordance with the fact that, in order to increase the convenience of its maintenance during operation, the liquid level sensor further comprises an intermediate plate with an indicator 20 with a scale mounted inside the measuring container with the possibility of vertical movement and fixation, with holes in the form of grooves made in the intermediate plate, and from 25 the measuring chamber is equipped with a bracket with threaded holes. 1606152 Aa