UA132956U - HORIZONTAL SECONDARY DISTRIBUTOR OF BIOLOGICALLY PURE WASTE WATER BY NITRIDENITRIFICATION METHOD - Google Patents

Abstract

A horizontal secondary sump having a distributor tray, a directional semi-submerged wall, a settling zone with pyramid-shaped sludge chambers, sludge removal lifts, and a receiving tray of clarified water, further having a sludge sludge and drift device.

Description

The useful model belongs to the devices for gravitational settling of liquids and can be used in the biological purification of household wastewater by the method of nitridenitrification.

In connection with the increase in standards for wastewater treatment from nitrogen and phosphorus compounds, at sewage treatment plants, the biotechnology of nitrite denitrification and biological phosphorus removal, which is based on the alternation of aerobic and anaerobic conditions for the process of biological destruction of pollutants in bioremediation facilities, began to be widely implemented.

A negative phenomenon inherent in the nitri-denitrification technology and due to sudden changes in the conditions of bacterial life (oxygen and substrate) is the formation of a significant number of floating dead particles of anaerobic sludge on the surface of secondary sedimentation tanks.

The use of traditional horizontal secondary clarifiers does not provide optimal conditions for the distribution of phases of the sludge-water mixture after the nitrite-denitrification facilities, which leads to the ingress of suspended particles of dead sludge into the clarified effluents.

This is a particular problem for horizontal secondary settling tanks located in the tank block during their reconstruction for the cleaning technology associated with nitridenitrification processes.

The collection and removal of floating sludge in horizontal sedimentation tanks during the reconstruction of the block of biological wastewater treatment tanks has not been resolved at the moment.

The collection of floating impurities in primary settling tanks is proposed in the standard project 902-3-15.

The solutions provided in the typical project 902-3-15 to the primary settling tank in terms of collection of floating impurities are close in essence to the useful model claimed.

The clarifier has a waste water inlet distribution tray, an intake semi-submerged flow-directing wall, a settling zone with a series of silt-receiving pyramid-shaped sludge chambers, an airlift system for removing settling sludge, a semi-submerged wall for retaining floating impurities, a point location impurities removal unit, a collection tray attached to the outer wall of the clarifier.

This design of the settling tank will not allow to effectively remove floating sludge from the zone of its removal in the form of a point structure.

This is due to the fact that in the primary clarifier, floating impurities have sufficiently large dimensions and can move freely under the influence of weak surface currents, both in the upstream and transverse directions of the clarifier. The floating sludge of secondary clarifiers has a finely dispersed structure and covers the surface of the clarifier mirror with a solid, slow-moving blanket. Thus, floating sludge masses are unable to concentrate in the point removal zone, as is observed in primary sedimentation tanks.

A secondary sump with a scraper for collecting floating sludge is also known 273900 (m/mlu. Mogaismatseg.g2/edoirtepi/ BESTIOM I0-978s EGEMEMT 110-345).

The scraper blade removes sludge from the entire surface of the secondary sump and transports it to the waste pipe. When moving in the opposite direction, the scraper blade rises above the water level.

The disadvantage of this design is the need for a chain or cable mechanism for the reciprocating movement of the scraper.

In addition, the sedimentation mirror must be freed from any obstacles, which is impossible in the conditions of removal of settled sludge by airlifts.

The closest in essence is the "Device for collecting and removing floating substances" invention of the USSR 501528529AI. The device for removing floating substances consists of a cart installed on guides with the possibility of movement, a shield for collecting floating impurities roughly fixed to the cable drive of reciprocating movement, a collecting tray that falls into a pocket installed on the end wall of the settling tank is driven into motion.

The disadvantage of this solution is the saturation of the structure with mechanical moving elements and drive means.

In addition, reciprocating movement of the shield along the sump of the structure of the tank block is impossible because airlift devices are installed in each of the sludge collection pits, which protrude above the water level and will interfere with the longitudinal movement of the structure.

The useful model is based on the task of improving the design of a secondary horizontal clarifier with frequent collection and floating sludge with the aim of using horizontal clarifiers, both those under construction and those to be reconstructed, in the wastewater treatment process associated with nitro-denitrification technology in under the conditions of alternating anaerobic, anoxic and aerobic regimes, in which the formation of a significant amount of dead anaerobic sludge on the surface of the sedimentation tank is observed, as well as the mechanical simplicity of the device design and the provision of a wide range of regulation by individual elements of the device.

The task is solved by the fact that in the secondary horizontal clarifier, which includes a rectangular container, a distribution tray, a current-directing semi-submerged wall, a settling zone with pyramid-shaped sludge chambers, sludge removal airfoils and a receiving tray of clarified water, a system for collecting and removing floating sludge is installed.

The front wall of the receiving tray is raised above the surface of the water, and a floating sludge removal tray with a bottom valve and an overflow board hinged to it is attached to it, with the possibility of adjustment with a handle with a locking sector.

The floating sludge removal device is made in the form of an air duct with jet nozzles. It is connected to the air duct with the help of a flexible pipe to the duct fan. The duct has a mechanism for adjusting the direction of the axis of the jet nozzles.

With the help of reactive air currents, the floating sludge is driven to the device for extracting it and is removed outside the sump through the bottom valve. At the same time, it is possible to adjust the intensity of overflow of sludge through an overflow hinged board.

In fig. 1 presents a plan of a horizontal clarifier (two sections).

In fig. 2 presents a section 4-4.

In fig. From the section 1-1 is presented.

In fig. 4 presents node A.

In fig. 5 presents a section 2-2.

In fig. 6 presents section 3-3.

The horizontal clarifier includes a rectangular container (1), a distribution tray (2), a current-directing semi-submerged wall (3), a settling zone (4) with pyramid-shaped sludge chambers (5), sludge removal airlifts (b), and a receiving tray of clarified water (7) . The front wall of the receiving tray (7) is raised above the surface of the water and a floating sludge removal tray (8) with a bottom valve (9) is attached to it. An overflow board (10) with a handle (11) and a locking device is hinged to the floating sludge removal tray (8). sector (12); includes a floating sludge removal device (13), consisting of an air duct (14), with

With jet nozzles (15) and flexible duct (16) connected to duct fan (17). The air duct (14) has a mechanism (18) for adjusting the direction of the axis of the jet nozzles (15).

A horizontal secondary settling tank for biologically treated wastewater using the nitridenitrification method works as follows:

The flow of the sludge mixture after the aeration tank (mixture of purified wastewater with activated sludge) enters the distribution tray (2) and through the semi-submerged wall (3) into the settling zone (4).

Sludge settles in pyramid-shaped sludge chambers (5) from where it is removed outside the sump by airlifts (b). Part of the anaerobic sludge has the property of floating and forming a layer of floating crust.

Clarified water through the overflow edge of the receiving tray (7), which is located on its back side, is removed outside the settling tank. And the floating sludge due to the fact that the removal of clarified water is carried out from the back side of the tray does not fall into the clarified water, but is collected in the drainage tray floating sludge (8) through the overflow board (10) hinged to the wall of the tray (8).

The floating sludge is removed through the bottom valve outside the sump. The intensity of removal of floating sludge is regulated by a handle (11) with a locking sector (12).

In order to remove the crust of floating sludge, which can occupy most of the active area of the settling tank, a device for removing floating sludge (13) is installed in the initial part of the settling tank. Through the jet nozzles (15) on the air duct (14), air is supplied under sufficient pressure and under the influence of artificial wind generated by the device, the floating sludge moves to the tray (8) of the floating sludge removal. Air is supplied to the duct (14) from the duct fan (17) through the flexible duct (16). The direction and range of the jet nozzles are adjusted by the adjustment mechanism (18).

The proposed horizontal clarifier of biologically purified wastewater by the nitridenitrification method provides an increased degree of purification from suspended particles of dead sludge, which is characteristic of nitridenitrification structures, both aerobic, which falls into pyramid-shaped sludge chambers, and anaerobic, which has the property of floating to the surface.

The proposed horizontal settling tank for biological wastewater treatment can be used both as part of a new construction of treatment facilities and in the reconstruction of old facilities. for

Claims (1)

USEFUL MODEL FORMULA 1. A horizontal secondary clarifier having a distribution tray, a flow-directing semi-submerged wall, a settling zone with pyramid-shaped sludge chambers, sludge removal airlifts, and a clarified water receiving tray, which is distinguished by having a floating sludge removal device and a floating sludge extraction device. 2. The horizontal secondary settling tank according to claim 1, which is characterized by the fact that the floating sludge removal device is made in the form of an air duct located in the transverse direction of the settling tank above the surface of the water by at least 200 mm, the air duct is connected by a flexible pipeline with an adjustment mechanism to the channel fan and has jet nozzles , directed along the sump. 3. The horizontal secondary sedimentation tank according to claim 1, which is characterized by the fact that the floating sludge removal device is made in the form of a tray with a bottom valve and a hinged overflow board with an adjustment handle and a fixing sector. 5 i xx M t xx BU i uh B y shi a p V V V V PO V V V V V V V VT NN S VE vn kn o KK ee pISHMKOEЭх OK o KV x Esh x sicheyu, ki hi OM VV PO VM shi ши ША B 7 ИЗ 1 У и х: в ще НН з ря х З -и јей х з И 8 З Z nopvopyvy ny den y Я в ZE: POM я, : nan vyk MISNH Z! PE B - : 7 y MY i "DY her Ж hv я Н кк Ж eh SCHI ky: KU Kiya Ann NN y KK Introduction cyp half of nm: sl poie sht W W 1X chi ih p M y ky KM U She UM U U MU U UUM UM U U Her past TE ME Ot KN Her N I ssh still te; nn SHY . 4 and 7 th Ne: r i - EOUTIVK KM NNnyanN, these A sh in MN with M NN g ОЖЖХК in iiiiiity OGO NEO! sbe ГИ и ии зе ЦО hi ho AVITOVEEIVTETT TI ainim V TE TE ! her her ra and that BV ZOLOTU KK UT sing KU KE and their my s. i NE I am Z SCHIKEUKABTHT peEOZHnyuyut Z V: V YAN Niv VV -- tn kN NN Me o KK V i i Uh BO What's wrong Fig. 1 bek B va sih zhh y ih 3 KE. nyin y Я х Х х , -e! vi i-y g ya M x "Ж 8 N я ж N y From their pools In : schey s U m ShK N yi Kedy: Э і і Sa i m A і ne A N tet KIT Kk Z llalalllllAlALAYA x Language N : AKA VVS AKA oU UA AKA KAM AAU i DE PADAV NVO De Ov VAV s ZOM NOSOV, EM IU Ch ZHEH MKM fpmenchemityienfimiyumimimiiiiiiy i y -- y zh: Y : ich xx E N SN ech pk. Z N TK fu i AAAAAAAAAAIAAINANVAAYA NN TTN VV i ЖЖ ЖЖ ttyatt paplyanlyanyanyanklyatyannianlyak" circle Sya u zn 115 deco N E N Riysk fe e pkt KAN i N EV En on given E N izh YIV om ect on Z doyu o ooyuyuyuk i zho. POLA NU ek yad dshyaisheaninyai .shevatai fed dadada A porrlavaaaatsa padadac pavatsam zhati chan chenya, dazvevasi "EV I y H 13 ВХ 5 E I Ton I E ! 1: : x E 151 I E N II. і і N NE ZNNNN: I N rii I і N GU 5 Z і N ri I E eh і Z N YA і і I : ! I 1. I; ve Shchi: yah ri i N 14. I : 15: I : their I N s, Ek : N which ; i au : N a EK : N , NE KUN Che ZU N o Br 2 i N yan MAK EE N roya : Mo ikh i do pi a Ks U PI chaat chto N zay v 5 MO KU: ZHK ZHH N i 1st ех KOH і A -ch i N і і Y RISHEN х Kt х і A sya A OK В гани і і : z У у; x ZU E i i i i : SYA m ptn oh K VU i E I yah ! и н s dy Х и NeZ du В как Н КК pav Я М дяite KE moh В НН х a з ям n и Х Х "я ше ки руш ве s. Ж Schi pani 1 ' che shcha y shi shh » sne she A OKU AN! zh i i: 2 pi i Z NA NN in U Th ZONES sho NN oi. 2 VZ U Sha Z ta x pf BY INII N . KM and KVU Not Kk. Zhod Kt SKOB. ov i nn nn nn mn ny nn nn r N LMIHUMY i N p Ach A KAAAAAAAAK A AAAAAAAAAAAAAAAAAAAAAAAAHAKAAHAAAAAAAAK AHA AAAAAAKAH AKAD A AAA KA AALAAN MA AnnAKy i N ! N N N fig. 2 z u g 1 y TU U 4 all z t i- Ko g s NU V o oi them I: 7 : g AKTU - i I ik i h e y Х i і14 t h a U 7 im х NE sho Z stnyah she daughter r 7! x PO N i z ho AVM N E: her Z a: I and for ki U i; N dya ar i i ; and her happiness I I N N their eh y T U i V ZM ID N ! ; и МН и, же Н : и м, in ZOBI a x shi i yi - - : Kk pr fenu y: z OK KOKO KO OO OO o OK KK OK Ko des: Kur EI SYNU N okko in UTA decade 15 N i i am я ТОКОЖЕК х ЩІ і Бо зв зни Пивні пень еввннннннн зон Пані пен нннн нн х: К Нв НН М Н з є ще Мох ' рудннкнннлнллнлнляннлнннкєкнннкнкнжинкикккижжкняжкняжквжюювєкюююююєююююю гехжкнженяжннжкняжннжжннжкннжкннжнннжкнжккнжккнжккнжкнжккнжкисяжк А ти Н Б ІЙ їду 13 БУК М Не Я КД няння сюжжююжююююююютююх сжжжюжююя ж зжжжжжжжюююююююх сжжжююжюююєюююююях пентнкеннннянр Ка NN puti lolttety dili A dity dlltttetetttttta B KI nn nn krkrreetyuyuyuyuyut pekettttttttyu pectin pegeeeeettyutyaktya and 1 I and N their tia ee o too yuyu rezh same zhzhzhzhzhzhzhyuyuzhih OH and I Kk ti I and Iii mi Kk; WOW! EM of the city of 14 nn p in her N Fig. WITH