RU2142416C1 - Sewage treatment installation - Google Patents

Abstract

FIELD: meat and food industries. SUBSTANCE: installation has supporting frame, drain casing, inlet branch pipe, suspended matter removal shelf, and filtering surface secured identically with drain casing. Tapered auger with blades made of elastoplastic material (rubber, plastic) is positioned inside filtering surface in contact with the latter. Blades are coupled to auger shaft, and they may slope downwards. Drive mechanism is arranged in upper part of construction. EFFECT: use for different types of liquid. 2 cl, 7 dwg

Description

 The invention relates to filtering liquids and can be used to clean coarse suspensions, for example, industrial wastewater, mainly industrial wastewater from the meat, fish and food industries.

 Known devices for wastewater treatment by filtration, the main working body of which is a filter drum with shelves on the inner surface. At the same time, the shelves serve as the body that removes solid impurities detained by the filtering cloth from the filtering zone and transporting them to the unloading place (for example, ed. St. SU N 1762977 A1 B 01 D 33/06, 09/23/92).

 The disadvantages of such devices are: a complex drive mechanism for unloading and collecting sediment, a filtering surface designed for a certain content of suspended substances of one kind or another, a large area of moisture evaporation, leading to the appearance of unpleasant odors, large overall dimensions, due to the need to raise the sediment above the discharge screw, as well as the bottom for the drain is many times larger than the size of the working bodies, taking into account the need for sewage slope.

 Also known device for wastewater treatment from coarse impurities, the main working body of which is a filter drum with straight shelves on the inner surface. At the same time, the shelves serve as the body that removes coarse dispersed impurities detained by the filtering cloth from the filtering zone and transporting them to the discharge site (for example, author St. SU N 1681899 A1 B 01 D 33/06, dated 07.10.91).

 The disadvantages of such devices are a complex drive mechanism for unloading and collecting sediment, a filtering surface designed for a certain content of coarse impurities, a large area of moisture evaporation, leading to the appearance of unpleasant odors, large overall dimensions due to the need to raise the sediment above the discharge screw, and also a bottom for drainage many times exceeds the size of the working bodies, taking into account the need for sewage bias.

Also known are tangential sand traps, the main working body of which is an unloading auger located at an angle of 30 ^o to the horizontal, and a telescopic pipe with a working part in the form of a cylindrical tank (for example, the designer’s guide “Sewerage of populated places and industrial enterprises.” - M .: Stroyizdat , 1981, p. 95).

 The disadvantages of such devices are also a complex and bulky drive mechanism for unloading and collecting sediment, a large area of moisture evaporation, leading to the appearance of unpleasant odors, large overall dimensions, due to the need to raise the sediment from the bottom of the unit above the level of the liquid to be cleaned.

 The objective of the invention is to increase the performance of the filtering device, reducing its cost, reducing overall dimensions, the possibility of using the device in relation to various types of cleaned liquids, reducing evaporation areas to a minimum.

 This is achieved by the fact that the wastewater treatment plant comprises a support frame, an inlet pipe, a drain casing, a suspension discharge shelf, a filter surface, a suspension discharge screw, a drive mechanism according to the invention, the suspension discharge screw is vertical and conical, and the auger blades made of an elastic-plastic material resistant to friction, while the drain casing is installed coaxially to the screw, and the filtering surface is placed between them and has the shape of a cone, it is removable. The fastening of the drain casing in case of wear of the auger blades makes it possible to displace the filter surface relative to the vertical axis, as well as the possibility of replacing the filter surfaces depending on the type of fluid being treated.

 It is advisable that the filtering surface is made of one metal mesh or a packet of mesh with filtering material.

 The design of the screw, filter surface and housing meets the criterion of "technical solution" and is workable, since it allows efficient use of production facilities and does not require special devices for unloading suspended matter (additional horizontal screws, drums, blades, etc.); complex drive mechanisms; separate drain pallets. The ability to replace the filter surface with a more or less dense one allows you to process various types of cleaned liquids with different degrees of purification. The tight fit of the working surfaces, even when triggered, increases the durability of the installation.

 In FIG. 1 shows the design of the proposed device in isometric projection with a quarter cut; in FIG. 2 is a side view of the structure along section AA; in FIG. 3 is a top view of the structure; in FIG. 4 is a view of the structure along section BB; in FIG. 5 is a view of the structure along the section CC; in FIG. 6 shows a filter surface made in the form of a mesh; in FIG. 7 - filter surface in the form of a packet of nets with filter material.

 The device comprises a support frame 1, a drain casing 2, connected to the frame 1 by a fastener 3, an inlet pipe 4 and a shelf for removal of suspensions 5, rigidly connected to the drain casing 2, a filter surface 6, fixed identically to the drain casing 2, inside the filter surface 6, being located with in contact with it, a conical screw 7 with blades 8, consisting of elastoplastic materials (rubber, plastic, etc.) is installed, the blades 8 are connected to the shaft 9 of the screw 7 by a fastener 10 and can have a downward slope, the cover of the drain casing 11, shaft 9 connected to bearing frame 1 bearing com mount 12, drive mechanism 13 is in the upper part of the structure.

 Installation works as follows. Untreated liquid enters through the nozzle 4 and enters the filter surface 6 and blades 8 of the conical screw 7, rotating, lifts the remaining suspensions to the shelf of the suspension of suspensions 5 and thereby cleans the filter surface 6. As a result, the liquid filtered through the filter surface 6, gets on the casing discharge 2 and leaves the installation, and the filtered suspension is discharged through the shelf 5.

 If it is necessary to better clean the liquid or to process a larger volume of the liquid being cleaned with a lower quality of cleaning, it is necessary to remove the cover 11 and remove the drain cover 2 and the filter surface 6. After inserting the necessary filter surface, reassemble in the reverse order.

 Thus, the proposed device allows for the fastest and most efficient wastewater treatment.

Claims (2)

 1. Installation for wastewater treatment, comprising a support frame, a drain cover, an inlet pipe, a shelf for discharging suspensions, a filtering surface, an auger for unloading a suspension, a drive mechanism, characterized in that the auger for unloading a suspension is mounted vertically and is made conical, and the auger blades made of an elastic plastic material resistant to abrasion, while the drain casing is installed coaxially to the screw, and the filtering surface is placed between them and has the shape of a cone and is removable with the possibility of adjusting the distance relative to the screw.  2. Installation according to claim 1, characterized in that the filtering surface is a metal mesh or a packet of nets with filtering material.

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