DD210214A1 - METHOD AND DEVICE FOR SEPARATING SOLIDS FROM WASTE PARTICLE PROBLEMS FOR CONTINUOUSLY WORKING MEASURING EQUIPMENT - Google Patents

Abstract

The invention relates to a method and apparatus for the separation of solids from wastewater streams by Siebvorgaenge, wherein using the known per se principle of Schraegklaerers with solids heavily polluted wastewater within a Flachduese under pressure up to 0.2 MPa is conducted parallel to and over Siebflaechen and nd below the sieves mechanically cleaned wastewater sub-stream anfaellt, which is fed to a measuring device. As a result, the field of application of existing continuous measuring methods and continuously or automatically working measuring devices for the determination of wastewater parameters extends to heavily polluted industrial wastewater, such as rinsing water and other similarly highly loaded with solids wastewater.

Description

Process and device for the separation of pesticides from waste water streams for continuously operating measuring equipment

Field of application of the invention

The invention "relates to a method and an apparatus for the deposition of undissolved Peststoffe from aqueous phase, In the aqueous phase it is preferably wastewater serteilstrSme that for the supply of measuring devices for the determination of effluent parameters such as _pH-value}} salinity conductivity fähigkeitj concentration of dissolved oxygen, etc. *. serve "the object underlying the invention method and apparatus are all industrial _Bareichen} in which is mechanically contaminated wastewater to specific ingredients and physics-chemical parameters Kalisz to investigate applicable"

Characterization of the known technical solutions

In the technical descriptions for automatic Analysenstatio- new (z _o B * "IAIADA" manufactured MIKROTECHNA Praha) is the removal of mechanical impurities in the Abwasserteil- flow for measuring by the interposition of a ifoerfallbehälters realized, in addition to the continuous supply of the measuring devices for retaining the Sink - and suspended material is used by sedimentation * This Vorrich- * tung is only suitable for wastewater containing mechanical contami "rAgwagen with grain sizes <Oj05 mm and therefore limit the use of measuring devices on sewage with solid impurities in the said order,

1982 * 04 ^ 351

Procedures or Yorri chtungeny with those of the "besehriebene effect the separation τοη mechanical impurities with Xorn-" sizes = _0? 05 mm! Liquids for Heßzwecke reached wird3> öffentliehungen about this subject area are not known from the corresponding! Literature and from Yer-. "

Object of the invention

The aim of the invention is a method and Yorrichtung for continuous separation of mechanical impurities from waste water streams for measuring whereby _s known continuous measuring method and - ^ equipment for the determination of pH ^ Wertj Hedospotentialj specific electrical Leit "capability. Concentration of dissolved oxygen, etc. "for heavily polluted industrial wastewater such as ash flushing water ₃ washing drums with a high content of mechanical impurities and similar highly polluted wastewater can be used«

presentation; the essence of the invention;

It is the object of the invention to develop ₃ known methods for the separation of mechanical impurities from liquids by sieving operations to a process and to a device ₃ by means of which a less polluted wastewater partial stream is produced _. which is suitable for the supply of measuring devices for the determination of wastewater parameters *

According to the invention, the object _{3 was to provide} a method for separating fine particles of pesticides with grain diameter έ 0j05 mm from liquids ₃ thereby dissolving ₃ that the wastewater to be examined under pressure up to _f 2 MIPa according to the known principle of Schräglclärers on or · more »eral inclined _screens} that are at an angle between 0 ° and 90 ° led ₃ while a Freiter wastewater stream loading of Peststoffen is diverted _e

According to the invention, the solids retained by the sieves are immediately and continuously removed from the sieve surface by the fan-shaped wastewater sub-stream

flushes urd wegtransportiert; the surface load of the screen surface with water and the resulting purified wastewater stream volume are determined by the change in the starting angle. "

Angle, which can be varied between 0 and 90.

According to the invention, the object of providing a device for carrying out the method described above is achieved by forcibly passing the mechanically highly stressed wastewater under pressure through a flat nozzle that is steplessly adjustable at an angle between 0 ° and 90 ° * The closed upper side of the flat nozzle also forms the lid of the collecting tank for the cleaned wastewater partial stream, while the underside of the Plach nozzle is provided with interchangeable screen surfaces, through which the wastewater partial flow freed of pesticides is directed into the collecting container «The retained solids particles are replaced by those with pesticides charged discharged via the screens flowing wastewater stream, thereby constantly cleaning the screen surfaces.

By changing the angle of attack of the Plachdüse, the amount of purified wastewater partial flow can be regulated, the size of the angle of attack is inversely proportional to the amount of diverted Abwasserteilstromstrom «The easy replacement of the screen surfaces allows optimal adaptation of the screening device to the medium to be cleaned in terms of'The size of the burden and chemical treatment? creating it * The supply of the waste water as well as the cleaning and forwarding of the waste water partial flow to the measuring device always takes place within a closed system ₃ whereby the original state of the wastewater samples to be measured is largely retained «

The inventive method including apparatus for separating solids from wastewater streams is characterized by the following technical and economic advantages:

- Extension of the field of application of known continuous measuring methods and devices for the determination of waste water parameters to heavily mechanically contaminated waste water, where * in the precipitation of solids by means of this method and this apparatus the premature wear of the measuring sensors (2 "B * Electrodes) «

- The design of the device allows the diversion of the waste water freed of Peststoffen partial stream with substantial exclusion of external influences, the _ESSS} the original nature of the waste water to the 5 ¹ Ii can also change tr corner between the removal portions and measuring device "

- When removing the water from a pressure line tzrw ₉ by a natural gradient producing attachment of the device is to ensure the separation process no additional power supply erforderlictu

- By taking place parallel to the screen surface Durchströinung the Plachdüse the vast majority of retained by the sieve tissue particles is entrained by the polluted wastewater partial stream and thereby achieved a constant self-cleaning 'screen surfaces and a largely maintenance-free operation of the device

- The structure of the device is characterized by simplicity _? low material usage and low production costs.

The sieves, which are the only wearing parts, can consist of slightly modified commercial parts and are easily interchangeable. »At the same time, this results in an uncomplicated adaptation to the respective properties of the waste water to be passed through

Aus tr ig e s ρ i e1

The method and the device according to the invention are explained in more detail below with reference to a drawing (Pigur i): According to the method, a pressurized wastewater main stream (A) with an average pesticide content is obtained

of about 50 g / l via a sampling nozzle (11) a waste water partial stream (B) of about 100 l / min branched off -and over the inlet support (10) of the flat nozzle (9) fed _o At a pitch angle of the Plachdüse (9 ) of ca _o 45 ⁰ C is after passing through the sieves (8) with a Siebmaschenweite γόη Ο, 09 min from the wastewater partial stream (B) a purified waste water partial stream (C) of about * 20 l / min branched, over the compensation collected by Schwanirangen collecting container (2) ge ^ collected and fed via the outlet (4) of the measuring device, while the contaminated with pollutants wastewater partial flow (D) via the collecting container (3) and the drain (5) again with the main sewage stream (A) For this example, the solids content of the effluent stream (3) of 50 g / l has the following X-ray size spectrum:

0.315 mm = 3 j 5 G Λ 12 j 5 % Oy 20 us - ⁼ 2 j 1 S A 7 D rf 0,125 ram = ς 7 A 20 j 36% 0.08 mm » 6 9 7 S A 23 j 93 % 0.05 τπτπ - 4 t 5 S A 16 j 07 # 0.04 τπτπ a 2 1 5 S A 8th 93 % 0.04 mm = 2 " 4 S A 8th Losses 0 δ S A 2 ♦ 14 %

The purified wastewater partial stream (C), however, contains only about 10 g / l of pesticides with a maximum Sorngröße of <0 ₃ 05mm <While with direlcter passage of the wastewater partial stream (3) by a continuous measuring device this fails after a short period of operation by sedimentation of the pesticide particles, is it possible to operate the measuring equipment continuously without the occurrence of disturbances with the purified waste water partial stream (C) _? that the wear of the probe is reduced and the cleaning-related downtime reduced to the usual level for such devices _s whereby a continuous maintenance-free measurement operation over long periods of time *

The device according to the invention consists of a collecting container (2) for the purified waste water stream (C) and a collecting container (3) for the loaded wastewater partial stream (B), each provided with a drain (4) ₃ (5) and through an overflow (5) from (2) to (3) "erburd-r. ~ Lnd .." On the collecting tanks (2) and (3) for the purified wastewater (C) and solid waste (B ) is the Siebhalterung (7) j at the same time the Beckel of the collecting container (2) _} from the horizontal by 90 upwardly pivotable and lockable arranged ₉ Bie Siebhalterung (7) has in its lower side two recesses., in which the sieves ( 8) are attached and on its upper side as a Plachdüse (9) formed essay with an inlet nozzle (10) for the wastewater Teilstrosi (B) and the outflow opening for the polluted waste materials with partial flow (B) *

Claims (6)

Brfindungsanspruch 1 Method for separating solids from waste water (B) for continuously operating measuring devices according to the principle known per se in the SchrägklärerSj characterized in that a forcibly "at a pressure" up to O ₅ 2 MPa under a Angle of incidence between 0 ° and 90 fan-shaped beam (B) is passed in parallel over one or more screen surfaces and divided into subsezable large wastewater streams (G and D) ₅ whereby the surface loading of the screen surfaces and the resulting size of the screen surfaces pass The cleaned wastewater partial stream (C) is regulated to the horizontal by changing the angle of attack of the fan-shaped jet (B), and the surplus cemented particle particles are immediately rinsed off with a diameter of the grain exceeding the screening machine width by the wastewater partial stream (D) flowing parallel to the sieve surfaces and the screen surfaces be continuously cleaned * 2 · Yorrichtung for carrying out the YerfahrenSj characterized ^ d§.Q connected sindj and the collecting container (2) and (3) j by means of the overflow (6) to the outlet (4) to the measuring device and the outlet (5) for waste water main stream (1) a horizontally adjustable at an angle smschen 0 ° and 90 ° adjustable and lockable Plachdüse (9) with inlet support η (10) is arranged _? whose upper side is closed and whose underside is equipped with interchangeable screen surfaces (8) « 3 «Device according to point 2, characterized by _? daJ3 by the comparison with the Tiaagerechten to 90 upward stepless Yerstellbarkeit the Plachdüse (9), the Yolumen the diverted wastewater partial stream (C) for continuous. can be regulated supply of the measuring device * 4 Apparatus according to items 2 and 3 _3, characterized in that according to the type ν, χύ size of the mechanical load and the chemical nature of the waste mainstream (A) the G-ro'ße and / or number and the screen material of the interchangeable screen surfaces (8) is varied * 5 * gate direction according to Punlct 2 to 4 characterized in that the Porm of the Plachdüse (9) is designed in such a way that _{3 of} the sewer section (B) mechanically loaded with pesticides under pressure up to 0 _? 2 MPa forcibly flows as a fan-shaped jet over and parallel to the sieve surfaces (8) _? · The pesticides that have been removed from the purified wastewater stream (C) are constantly purged from the sieve surfaces (8) and continuously cleaned. « 6 * Device according to point 2 to 5 _} characterized in that the gate direction forms a closed system, which excludes the change in the condition of the sewage partial flows (B) and (G) on the Pließstrecke'from the withdrawal port (1.1) ^ZUT measuring device - For this 1 sheet drawings