SU1326561A1 - Device for changing concentration of active silt in waste water - Google Patents

Abstract

The invention relates to a wastewater treatment technique, in particular, to devices for measuring the concentration of activated sludge. The aim of the invention is to improve the measurement accuracy and reliability of the device. Performing a concentration sensor .13 in the form of an optron consisting of optical fibers 14 and 15, protective glasses 16 and 17, a lens 18, a light filter 19, a photometric ball 20 in the case of which the system 21 is mounted, allows you to measure directly in sumps, and the presence of nas in the concentration sensor housing facilitates instrument maintenance. In addition, the use of two optical channels allows for improved measurement accuracy. 1 il. $ | SL SL O

Description

The invention relates to a wastewater treatment technique, in particular, to devices for measuring the concentration of activated sludge.

The purpose of the invention is to improve the measurement accuracy and reliability of the device.

The drawing shows a diagram of the device.

The device contains a light source 1, a first focusing system 2, consisting of a lens 3, an optical capacitor 4 and a filter 5, a first photodetector 6, a first amplifier 7, a voltage divider 8, a measuring and regulating unit 9, a second focusing system 10, a second photodetector 11, a second amplifier 12, a concentration sensor 13, consisting of the first 14 and second 15 light guides, protective glasses 16 and 17, a lens 18, a light filter 19, a photometric ball 20 and a third focusing system 21, a power supply unit 22.

Light from source 1 is directed through two channels.

The channel of formation of the reference signal consists of the first focusing system 2 and the first photodetector 6 with the amplifier 7.

The measuring channel contains a second focusing system 10, a second photodetector 11 and a concentration sensor 13 with optical fibers 14 and 15.

The device works as follows.

The concentration sensor 13 is lowered into wastewater containing activated sludge. The optical slot formed between the protective glasses 16 and 17 is filled with measured water.

Source 1 radiation collimates

measured sample At the output of the divider 18 f signal

with linoa 3 and, passage through the optical compensator-4 and filter 5, pop, c-45

The photodetector 6 is amplified by the amplifier 7. The second focusing system 10 focuses the radiation of source 1 into the optical fiber 14, at the output of which the radiation is collimated by lens 18, and the protective glasses form a groove in which the measured medium, active sludge, is located. The transmitted radiation is monochromatized by the light filter 19 and falls into the integrating photometric ball 20, at the output of which a third large focusing system 21 with a large aperture is mounted,

wed

F, K, K,

which does not depend on the light of the source.

 gQ Sigal and is used for concentrations of actively measuring and regulating

55

Cx fr (U)

where f is the calibration f

device.

Thus, in the pre-device there are no dv

radiation into the light guide 15, from where it falls on the second photodetector 11. The signal of the photodetector 11 is amplified by the amplifier 12. The signals from the amplifiers 7 and 12 are shared by the J8 device and the resulting ratio is determined by the measuring and regulating unit 19,

Optical concentrator 4 in the channel allows balancing of the reference channel. The third focusing system 24 allows maximum collection of the radiation scattered in the integrating photometric ball 20.

The signal of the channel of formation of the reference signal is determined by the expression

and f „K, K ,, 1g,

where ro

f K

one

TO

one

luminous flux of the source, light 1;

coefficient-: photodetector 6 transmission and amplifier 7; light source utilization ratio of the channel optical system;

 G, is the transmittance of the optical compensator 4 ..

The signal of the measuring channel is equal to. FoCeC, s, where Kj

photodetector transfer coefficient 11 and amplifier

12;

K is the coefficient of use of the luminous flux by the optical system of the measuring channel; f - transmittance

measured sample. At the output of the divider 18, a signal is generated

and

wed

F, K, K,

one

which does not depend on the luminous flux of the source.

 gQ Sigal and is used to determine the concentration of activated sludge in the measuring and regulating unit 9

55

Cx fr (U)

where f is the calibration function

device.

Thus, in the proposed device there are no moving

parts, and the presence of a channel compensates for changes in the luminous flux of the radiation source. The remote design of the optocoupler allows measurement directly in the sumps, and the open groove makes it easier to service the instrument.

Claims (1)

The formula of the invention of the first fiber, lens, two A device for measuring the concentration of activated sludge in wastewater, containing a light source that is optically One end of the first fiber is connected to the formation of the third focusing system, the other focuses to the third focusing system, the other to the second photolon signal that includes the first focusing system connected in series and the first photodetector with the measurement channel that switches on the second focusing system; a photodetector, a measuring and regulating unit, which is characterized by the fact that receiver, in the body of the concentration sensor, there is a slot between two protective glasses, one end of the second light guide is set at the focus of the second focusing system, and the other is at the focus of the lens. Due to the measurement accuracy and reliability of the device, it contains a voltage divider, the output of which is connected to the input of the measuring and regulating unit, the inputs of the voltage divider are connected to the outputs of the photodetectors, the concentration sensor is made in the form of an optocoupler protective glasses, a light filter, a photometric ball, in the case of which a second focusing system is installed, and a second light guide, receiver, in the body of the concentration sensor, there is a slot between two protective glasses, one end of the second light guide is set at the focus of the second focusing system, and the other is at the focus of the lens.