RU167216U1 - DEVICE FOR WASTE WATER DRAINAGE ON Sludge Fields - Google Patents

Abstract

A device for dewatering sewage sludge on sludge sites, comprising a housing configured to immerse into the sludge and mounted in a vertical position, the upper part of which is a filtering element, and the lower part is a storage tank, a pump, a vibrator located in the housing, characterized in that the case is cylindrical and mounted on cables with the possibility of immersion in the sediment to a depth of H = L-100, where H is the immersion depth, mm, L is the height of the cylindrical body, mm, while the vibrator olnen to provide a vibrational displacement body horizontally.

Description

The utility model relates to the field of wastewater, treatment and dewatering of urban wastewater sludge and is a mechanical method of dehydration.

Known dehydration on vacuum filters and filter presses [1]. This sludge dewatering is a process of separation of solids from a liquid, which occurs at a pressure difference above and below the filter medium. The filter medium on the vacuum filters and filter presses is a filter cloth and a sediment layer adhering to the fabric during the filtering process. Such dehydration is of limited use both because of the high concentration of contaminants in the filtrate, and because of the high cost of both the plants themselves and their operation due to the complexity of the design and low reliability, the need for coagulation with expensive reagents and the inability to use organic flocculants, the need to replace the filter tape and increased power consumption.

Known dewatering screens and sieves [2]. When using them, the dehydrated material moves along the gutter, at the bottom of which a sieve is installed. The sieve is continuously shaken, thus loosening the dehydrated material. The disadvantages of this technical solution are the intensive mixing of the dehydrated material, which slows down the rate of separation of the solid phase from the liquid and slows down the dehydration process. The presence of oil-fat components of the sediment contributes to the formation of difficult-to-filter suspensions, including colloidal type, for this reason they are rapidly deposited and compacted on a sieve located at the bottom of the trench, and as a result, the sieve is clogged with such compounds and a sharp decrease in dehydration efficiency.

A known filtering method and a vibration filter for its implementation (SU 1567246 A1, publ. 30.05.90) [3] according to which the filtered medium is passed through a filter partition that vibrates in two directions of filtering the medium: perpendicular and parallel, and filtering is carried out simultaneously with pressure pulsation and the direction of vibration is periodically changed in the circumferential direction, and the rotation is carried out at a variable speed. Such a vibration filter comprises a housing with inlet and outlet nozzles, a cylindrical filter element, a pulsator and a drive turbine for rotating the filter. Vibration of the filter screen contributes to its self-cleaning. The disadvantages of this technical solution are the design complexity, the need to supply a filtered medium under pressure, the presence of a pulsator, which makes it practically impossible to use it for filtration dewatering of sewage sludge in silt fields.

Closest to the claimed technical solution is a screening device (RU 2532183 C2, publ. 10.12.2013) [4] designed to separate the liquid components from the suspension, according to which it includes a reservoir for the receipt and accumulation of separated liquid components, a sieve for separating liquid components, vibrator.

The disadvantages of this technical solution are the low efficiency of the vibration impact on the sieve, since only the center of the sieve at the point of attachment of the pusher oscillates with a maximum amplitude, and the amplitude of the oscillations decreases with distance from the point of attachment to zero, design complexity requiring the presence of vibration isolating supports and a pusher for the vibrator, the need in several vibrators for driving screens located around the periphery of the device, which makes it ineffective for filtering zvozhivaniya sewage sludge on sludge fields.

The task to which the claimed utility model is directed is to hang the effectiveness of the vibration effect on the filter element and prevent it from clogging, simplifying the design, the possibility of pressureless dewatering of sewage sludge in the sludge field, while maintaining the constant functioning of the sludge field.

This problem is solved due to the fact that the inventive device for dewatering sewage sludge on sludge sites, comprising a housing made with the possibility of immersion in the sludge and fixed in a vertical position, the upper part of which is a filtering element, and the lower part is a storage tank, a pumping pump , a vibrator located in the housing, while the housing is cylindrical and mounted on cables with the possibility of immersion in the sediment to a depth

H = L-100,

where H is the immersion depth, mm., L is the height of the cylindrical body, mm., while the vibrator is configured to provide oscillatory movements of the body horizontally.

The technical result provided by the given set of features is to ensure self-cleaning due to vibration of the filtering element, increasing the efficiency of the vibration effect on the filtering element, simplifying the design, the possibility of dewatering wastewater sludge by a non-pressure method directly on silt fields, when the entire device is immersed in the sludge. At the same time, the use of the sludge field is intensified. Thanks to the techniques and constructive relationships described by the above features, we can conclude that the criterion of "utility model".

The invention is illustrated in the drawing, which shows a diagram of a device. The device comprises a housing 1 configured to immerse in sediment 4 and secured in an upright position, the upper part of which is a filter element 2, and the lower part is an accumulation tank 3, a pump out pump, a vibrator 5 located in the housing, while the housing is cylindrical and fixed on cables with the possibility of immersion in the sediment to a depth

H = L-100,

where H is the immersion depth, mm, L is the height of the cylindrical body, mm, while the vibrator is configured to provide oscillatory movements 6 of the body horizontally.

The elevation of the walls of the casing by 100 mm above the surface of the precipitate is necessary to prevent its overflow through the upper edge of the casing as a result of unrest on the surface or fluctuations in the level of sediment in the rainy season. To prevent flooding, the device is suspended on cables (not shown in Fig.) On the surface of the bottom drainage 7.

The proposed utility model works as follows: the device is immersed in the sewage sludge 4 at the sludge pads by the specified value H so that the surface of the filter element 2 is vertical and includes a vibrator 5, under the action of which the device body 1 vibrates, and the liquid is filtered through the filter element 2 and the flow of stream 8 and the discharge of the filtered liquid 9 into the storage tank 3 of the lower part of the housing, from where the liquid is pumped out by a pump (not shown in Fig.). The presence of vibrations contributes to the intensification of the filtering process and self-cleaning of the filter element. At the same time, the existing drainage systems of 7 sludge pads are also used and through them 10 moisture is also removed.

The application of the proposed utility model is most effective in the removal of silt water in the following cases:

- in the spring, when silt drainage is still frozen (especially relevant in the Urals and Siberia), as well as in the presence of precipitation;

- when the sediment is stratified, since its lower layer is compacted, and filtration through the drainage stops.

Sources of information taken into account

1. Blagorazumova A.M. Treatment and Dehydration of Urban Sewage Sludge: A Training Manual. - 22nd ed., Rev. And add. - St. Petersburg: Publishing House "Lan", 2014. - 208 p.: Ill. - (Textbooks for universities. Special literature).

2. Chuyanov G.G. Dehydration, dust collection and environmental protection: Textbook for universities. - M .: Nedra, 1987 .-- 260 p.

3. A.S. No. 1567246 A1 of the USSR, MKI. B01D 37/00. 29/72 Method A filtering method and a vibration filter for its implementation / CB. Belov, V.A. Devisilov, V.N. Zhdanov and A.K. Petrenchuk. - No. 4297542 / 31-26, declared 08.17.87, publ. 05/30/90, Bull. No. 20.

4. Pat. RU 2532183 C2, IPC B01D 35/05 (2006.01) Screening device / A. Dietrich (DE) - No. 2012122539/05, declared 05/31/2012, publ. 12/10/2013 Bull. Number 34

Claims (1)

A device for dewatering sewage sludge on sludge sites, comprising a housing configured to immerse into the sludge and mounted in a vertical position, the upper part of which is a filter element, and the lower part is a storage tank, a pump, a vibrator located in the housing, characterized in that the body is cylindrical and mounted on cables with the possibility of immersion in the sediment to a depth H = L-100, where H is the immersion depth, mm, L is the height of the cylindrical body, mm, while the vibrator is configured to provide horizontal oscillatory movements of the body.

Images