SU996335A1 - Settling tank - Google Patents

Description

The invention relates to facilities for mechanical wastewater treatment and can mainly be used for industrial treatment: effluents from suspended solids of mineral origin and oil products, as well as for storm water purification.

An open hydrocyclone is known as a sump consisting of a cylindrical one passing into the cone in the lower part, a body and two coaxially installed partitions, the second partition from the center having an expanding socket in the lower part. Into the annular zone formed by these. by partitions, a tangential flow of drains is carried out. ' rotating in this zone ^{1 of} centrifugal clarification, the wastewater is lowered and, following the shape of the expanding bell, step g into the second zone, the zone of gravity. tionary clarification, where their movement takes a vertical direction up to the annular drainage tray. From the tray, clarified water is sent to the reservoir of the pumping station, designed to supply water for industrial needs [1].

A disadvantage of the known sump is the need to build a separate pumping station.

Closest to the proposed technical essence and the achieved effect is a sump containing a cylindrical housing with centrifugal and chambers. _gravity-: clarification, sewage supply pipe, drainage trays, pumping units, slag-collecting chamber and hopper for sludge dewatering. The use of this sedimentation tank allows to reduce the content of suspended solids from 2000-4000 mg / l to 150-300 mg / l [2].

However, to supply water for industrial purposes, it is necessary, as a rule, that the content of suspended solids in the effluent does not exceed 50 mg / l.

The aim of the invention is to reduce the content of suspended solids in the treated "effluent to 50 mg / L.

This goal is achieved in that the sump containing a cylindrical-conical body with centrifugal gravity clarification chambers, a drain pipe, drainage chutes, pumping units, a sludge collecting chamber and a sludge dewatering bin is equipped with filters installed in the upper part and connected to the sump by a clarified water pipeline and a pipeline water drainage after washing the filters with a clean water tank for purging the filters connected to the filters by pipelines for supplying and discharging clean water.

The drawing shows a sump, section. C)

The sump has a cylindrical casing 1 with a sludge collecting chamber 2, a central shaft 3, a centrifugal clarification chamber 4 (zone) formed by the wall 5 of the central 15 shaft and a cylindrical partition 6 with an expanding bell 7, which forms a gravity clarification chamber 8 (zone) with the outer casing of the sump. A nozzle 9 passes into the centroid chamber of beige clarification for the tangential supply of effluents to be treated. A clamshell crane 10 is provided for cleaning the sump. To collect clarified water 25, there are trays 11 and a compartment 12 for clarified water. Above the compartment are pumps 13 for pumping clarified water. In the sump there is a hopper 14, equipped with a drainage 15 for dewatering the sludge. In the upper part of the sump, filters 16 are placed with a pipe 17 for water drainage after washing the filters and with a pipe 18 for drainage of clean water, through which water after treatment is sent to production needs. A tank of clean water 19 for washing the filters is located next to the settlers.

The device operates as follows. 40

Wastewater to be treated is fed through a tangential pipeline 9 to centrifugal clarification zone 4, passes the first purification stage, is lowered and, under an expanding scrub 45, goes into the second gravitational clarification zone 8. In this aeon, water rises, clarifies, and flows into the drainage trays 11, of which it is directed by gravity flow into the compartment 12 of clarified water. The content of suspended solids in the clarified water compartment is 150-300 mg / l. From the compartment, pumps 13 supply water to the filters 16. After filtration, the content of suspended solids is reduced to 50 mg / L. Pure water is directed to production needs through the pipeline 18 drainage of clean water.

The filters operate in automatic mode and are periodically washed with water from the tank 19. After washing the filters, the water is sent to the sump through the water discharge pipe 17.

Sludge is removed periodically with a grab 10 from the bottom.

The proposed · sump has the following advantages. The degree of purification is sufficient to use water for industrial purposes, since it meets the water requirements of almost all consumers, while clarified, but not filtered water can be supplied only to consumers who do not have high requirements for water (floor washing, waste hydrotransport production, etc.). In the proposed sump, water generated during periodic washing of the filters is directed to the gravitational clarification chamber and is cleaned in the sump. As a result, there is no need for separate facilities for treating wash water.

Installing filters in the upper surface of the sump allows you to abandon the weight of building structures of the sump, which gives an additional economic effect.

Thanks to the proposed placement of filters, the degree of use of lifting equipment is increased and its cost is reduced. So, the overhead sump crane is designed both for servicing filter equipment during repairs, and for removing sludge from the sump.

Claims (2)

The invention relates to mechanical tools for the mechanical treatment of wastewater, and can advantageously be used for the treatment of industrial effluents from suspended matter of mineral origin and oil products, as well as for cleaning storm water. The known hydrocyclone-OTSTAYNIKg consisting of cylindrical, passing in the lower part into a cone, body and two coaxially installed partitions is known, with the second partition from the center having an expanding socket in the lower part In the annular zone formed by these partitions, the tangent approach drains, turning;; this zone of centrifugal clarification, sewage down | mf and, following the shape of the distancing socket, according to r. c fyriiioT to the second zone-zone of gravity. There is a national clarification where their movement takes the vertical direction upwards to the annular catchment tray. From the tray, the clarified waters are directed to the reservoir of a pumping station intended to supply water for industrial needs. The bottom of the well-known sedimentation tank is the need to build a separate pumping station. The closest to that we offer is the technical essence and the achieved effect is a settling tank containing a cylindrical body with a chamber of centrifugal and gravitational clarification, a sewage supply nozzle, drainage chutes, pump units, a slag storage chamber and a yulam dewatering bunker. The use of this sump allows you to reduce the suspended matter content from 2000-4000 mg / l to 150-300 mg / l 2. However / for supplying water for production needs, it is usually necessary that the suspended matter content in the effluent does not exceed 50 mg / l . The goal of this treatment is to reduce the content of furious substances in the treated effluent to 50 mg / l. This goal is achieved by the fact that a settling tank containing a cylindrical housing with centrifugal lightening chambers, a sewage supply nozzle, catchment chutes, pumping units, sludge accumulation chamber and an anthrax bunker: willow sludge, equipped with filters installed in the upper part, soyi-6 water and water clarification line after washing the filters, clean water tank for washing the filters connected to filters with supply and discharge pipelines s. The drawing shows a sump, incision. The sump has a cylindrical body 1 with a sludge chamber 2, a central shaft 3, a chamber (zone) of centrifugal clarification formed by a wall 5 of the central shaft and a cylindrical partition with an expanding spout 7, which forms a gravitational clarification chamber with the outer shell of the sump. In the chamber, the center of the beacon clarification passes patrubo 9 for the tangential supply of the waste to be treated. A grab crane 10 is provided for cleaning the sump. To collect clarified water, there are trays 11 and a compartment 12 of clarified water. Above the compartment are pumps 13 for pumping clarified water. In the sump there is a bunker 1 provided with a drainage 15 for sludge dewatering. In the upper part of the settling basin, filters 16 are located with a pipe 17 for draining water after washing the filters and with a pipe 18 for draining clean water, through which water is sent for cleaning after cleaning. Next to the sump is a clean water tank 19 for washing the filters. The device works as follows. The wastewater to be treated is fed through a tangential pipeline 9 to the zone 4 of the centrifugal clarification, the first purification stage is lowered and under the expanding growth 7 it passes to the second zone 8 of the gravitational clarification. In this zone, water rises, clarifies, and flows into catchment chutes 11, of which is directed by self-flowing mode into compartment 12 of clarified water. The suspended solids content in the clarified water compartment is 150-300 mg / l. From the compartment of the pump 13, water is supplied to the filters 16. After filtration, the content of suspended substances is reduced to 50 mg / l. Pure water is directed to the production needs of the pipeline 18 for the removal of clean water. The filters operate in automatic mode and are periodically filled with water from the tank 19. Water after washing the filters is sent to the sump through a water removal pipeline 17. Sludge removal is periodically produced by a grab 10 s dn.od. The proposed sump has the following advantages. The degree of purification is sufficient for the use of water for production needs, since it meets the requirements of almost all consumers for water, while clarified but not filtered water can be supplied only to consumers without setting it to requirements (flushing of floors, hydrotransport of production waste, etc.). In the proposed sump, the water formed during the periodic washing of the filters is directed to the gravitational clarification chamber and is cleaned in the sump. As a result, there is no need for separate facilities for cleaning the wash water. Installing filters in the upper ground part of the sump allows you to refuse the utmost of the sump building structures, which gives an additional economic effect. Due to the proposed filter placement, the degree of utilization of the lifting equipment is increased and its cost is reduced. Thus, the sump overhead crane is designed both for servicing the filter equipment during repairs and for cleaning up the sludge from the sump. Claims of the invention: A settling tank comprising a cylindrical housing with centrifugal and gravity clarification chambers, a sewage supply pipe, catchment trays, pumping units, a sludge collection chamber and a sludge dewatering hopper, in order to decrease the suspended substances in treated effluents up to 50 mg / l, it is equipped with filters installed at the top, connected to a clarifier with a clarified water pipeline and a water drain pipe after washing the filters, with a clean water tank for flushing connected with filters pipelines for the supply and removal of clean water. Sources of information taken into account in the examination 1. The author's certificate of the USSR 701951, cl. C 02 C 1/26, 1977. 2. Authors certificate of the USSR 785211, cl. C 02 F 1/52, 1978 (prototype).