SU580874A1

SU580874A1 - Settling tank for cleaning waste water

Info

Publication number: SU580874A1
Application number: SU7602330107A
Authority: SU
Inventors: Иосиф Гасанович Шафи-Заде; Мисир Алишевич Курбанов; Игорь Сергеевич Минасян
Priority date: 1976-03-03
Filing date: 1976-03-03
Publication date: 1977-11-25

Description

1one

Изобретение относитс к сооруже- , ни м механической очистки сточных вод а более конкретно, к тонкослойным от стойникам с параллельнымм наклонныгим пластинами предназначенным дл очисткисточных вод различных производств , содержащих всплывающие и оседающие компоненты загр знителей.The invention relates to construction of mechanical wastewater treatment and, more specifically, to thin layers of guardians with parallel inclined plates intended for cleaning the wastewater of various industries containing populating and settling components of contaminants.

В пластинчатых отстойниках большое значение имеет равномерноераспределение потока жидкости по живому сечению сооружени , так как эффект ихработы достигаетс лишь при равномерной гидравлической нагрузке по всем межпластинчатым -пространствам . In lamellar settling tanks, the uniform distribution of fluid flow over the living section of a structure is of great importance, since the effect of their work is achieved only with a uniform hydraulic load across all plate-to-spaces.

Известен тонкослойный отстойник, в корпусе которого размещен пакетна клонных параллельных пластин, при этом плоскость, в которой наход тс верхние кромки пластин, горизонтальна Ul .A thin bed settler is known, in the casing of which a stack of cloned parallel plates is placed, while the plane in which the upper edges of the plates are located is horizontal Ul.

Недостатком устройства вл етс низка степень использовани объема отстойника.The disadvantage of the device is the low utilization of the volume of the settling tank.

Наиболее близким по техническому рещению, предлагаемому вл етс тон кослойных отстойник, в котором верхние кромки пластин равномерно сдвину относительно друг друга по вертикали таким образом , что оказывгиотс The closest to the technical solution proposed is the tone of the bed-trough sump, in which the upper edges of the plates are evenly shifted relative to each other vertically in such a way that

лежащими в плоскости, наклоненной,.к горизонтали под некоторым углом 2j ,lying in a plane, tilted,. horizontally at some angle 2j,

Данный отстойник обладает тем же недостатком, при этом следует указать что в обоих случа х указанное расположение пластин на практике оказываетс недостаточным дл равномерного распределени воды по живому сечению отстойника . Это объ сн етс тем, что, как известно, дл отвода из основного tjoTOKa ( в данном случае - открыто го потока, движущегос под пластинами и распредел ющего свой расход в меЖйпастинчатые пространства) переменной массы равных расходов, необходимо , чтобы скорость этого потока над каждым межпластинчатым зазором была одинаковой. Это условие при горизонтальном расположении плоскости, в которой лежат верхние кромки пластин, нарушаетс , так как в распределительном объеме над пластинами происходит непрерывное уменьшение расхода воды, а при посто нном живом сечении распределител ; скорость воды в нем будет также непрерывно уменьшатьс .This sump has the same drawback, it should be noted that in both cases the specified arrangement of the plates in practice is insufficient for even distribution of water over the living section of the sump. This is explained by the fact that, as is well known, for removing from the main tjoTOKa (in this case, the open flow moving under the plates and distributing its flow to interlab spaces) of a variable mass of equal flow rates, it is necessary that interplate clearance was the same. This condition is disrupted by a horizontal arrangement of the plane in which the upper edges of the plates lie, since in the distribution volume above the plates there is a continuous decrease in water consumption, and at a constant living section of the distributor; the water velocity in it will also decrease continuously.

Claims

Taking into account that the speed of water movement across the depth of the open stream is unevenly distributed (the upper layers move with higher speeds than the lower ones), to cut the upper edges of the plates from the water flow into the ra. an equal flow limiter is necessary, so that the elevation of each contiguous edge above the previous one ensures the removal of equal water flow rates in the lamellar spaces of the settler, the lower the water velocity, the greater the elevation of one edge above the other; under this condition, the surface in which the upper edges of the plates are installed is not vMoneT-by-plane, as is the case in the above solutions; and will be curvilinear.; The water flow decreases in the distributor from the initial value to zero at the end of it, and therefore, to maintain the constant flow rate of water above the plating, it is necessary to reduce the depth of the flow from the initial value to zero at the last plate, i.e. the upper edge of the last plate should be located on the water mirror. Thus, the shape of the surface in which the edges of the plates are installed in the sump is a decisive structural factor affecting the uniform distribution of fluid across the inter-plate spaces. The purpose of the invention is to increase the efficiency of wastewater treatment by distributing it evenly to the section of the settling tank (across the interplate spaces). For this, the upper and lower edges of the plates are arranged along a parabola, the top of which is placed near the bottom of the plate along the bottom. In this case, by choice, based on specific conditions, various ratios of the length of the distribution channel and its initial depth and the parabola parameter are possible. In this case, an optimal variant is suggested, in which the parabola parameter ranges from 0.05 to 0.08, and the ratio of the distributor length to its depth is from 2.7: 1 to 3.5: 1. The drawing shows the scheme of the proposed settling tank. . The sump contains a supply channel 1, which passes into the distributor 2, parallel plates 3 are placed in the settling part, the upper edges 4 of which are arranged along a parabola, the top of which is placed along the first plate along the liquid of the distributor, below the plates is a sedimentary zone five; to collect the clarified liquid, there is a collection tray 6. The settling tank works as follows .. Sewage water from the supply channel 1 enters the distributor 2 located above the plates 3, and then flows (evenly) into the interplate spaces, where it settles. As a result, populations of lhc contaminants are collected above the plates, and the precipitates are accumulated on them. By virtue of the slope of the plastia, the constables are transported; p6 -NIM; respectively, either; on the turn; } water, or into sedimentary soiiy 5, from where they are removed by known methods. The clarified liquid is removed from the settling tank by means of collecting tray 6. The above described arrangement of the upper and lower edges of the plates (on a curved surface) is the best and allows using the settling volume, up to 93-98%. DETAILED DESCRIPTION OF THE INVENTION A settling tank for wastewater treatment, comprising parallel plates installed with a slope in the direction of flow of suspensions and a supply channel distributor, characterized in that, in order to increase the efficiency of wastewater treatment by distributing them evenly across the interplate spaces, the upper and lower edges of the plates located along a parabola, the top of which is placed at the first plate along the liquid, adjacent to the bottom of the distributor. Sources of information taken into account in the examination: 1. US patent number 3494475, cl. 210521, 1970.

2.Jo aloHhe Wdtep PotEition CotitfoE Feevation 34, No. 1, 1962.

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