RU2075454C1 - Slime water clarification apparatus - Google Patents

Abstract

FIELD: water clarification treatment. SUBSTANCE: apparatus comprises casing, inlet for admission of feed water, conically shaped bottom, replaceable filtering bed made of thick material, and charging device in form of chamber accommodating vertical pipe having slots and inclined plates to prevent penetration of coarse solid particles into pipe. Upper part of casing houses water-collecting trough. Below filtering bed, apparatus comprises water distributing device having openings communicating with lower part of vertical pipe. Apparatus also comprises slime discharging device consisting of drive-actuated gate valve and control unit including microprocessor and medium density sensor. Upper part of casing is made telescopic so that by varying its height slime water pressure can be controlled. Apparatus can optionally comprise branch pipe for supply of flocculant. This branch pipe is connected to feed slime water admission pipe and arranged upstream of charging device. EFFECT: useful in water clarification practice. 2 cl, 1 dwg

Description

 The invention relates to the field of hydromechanization, namely: to thickening apparatus of coal slurry and clarification of circulating water.

The closest analogue to the present invention is a device for separating coarse impurities from liquids, including a clarifier with a suspended sediment layer, made in the form of a cylinder with a conical bottom, a loading device in the form of a chamber and a discharge device for sludge with a drive. At the top of the clarifier is a drainage channel [1]
However, this apparatus does not provide high-quality thickening of solid, since during unloading, the accumulated sludge is additionally diluted with sludge water.

 The purpose of the invention is to increase the efficiency of clarification of sludge water and thickening of a solid product.

 The drawing shows a thickening apparatus, General view.

 The apparatus consists of a housing 1, a clarifier with a conical bottom, a loading device in the form of a chamber 2, a water intake device in the form of a vertical pipe 3, made with slots and with inclined plates, preventing large particles of solid, moving parts of the slurry water supply chamber 4 from entering it , by changing the position of which the filtration head of the slurry water, the density sensor of the medium is regulated 5. A water distribution device is located in the lower part of the intake device in the form of pipes 7 with holes, in total section of which is equal to the cross section of the riser pipe 3, sludge discharge device is designed as a valve 8 with an electric drive and a screw vygruzhatelya slurry 9 with the electric drive, which serve for discharging thickened slurry to a signal from the medium density sensor through a process control unit comprising a microprocessor. Drainage of clarified water is carried out along the entire perimeter of the clarifier body through the chute 6.

 The device operates as follows.

 The pulp enters the pulp supply chamber 2, where the flocculant is simultaneously fed, large and small rock masses, axial under its own weight, form a filter layer that overlaps the annular gap between the housing 1 and the pulp supply chamber 2. The pulp from the upper part of the intake device enters through the slots between the inclined plates into the water distribution device 7 and is evenly distributed over the cross-section of the filtration layer.

 Slurry water, moving in an upward direction due to a pressure equal to Hh, passes through the filtration layer, the suspended filtration layer, becomes clarified and enters the catchment and then to the consumer.

 The discharge of thickened slurry is carried out automatically by a signal from the density sensor 5 through the control unit, which turns on and off the electric drive of the valve 8 and the screw unloader 9.

 Using the proposed thickening apparatus will allow to thicken the slurry with a volume ratio of solid in it up to 85% to clarify the circulating water with a mass concentration of solid in it up to 0.5 1.5 kg / cubic meter with high specific loads of up to 50 cubic meter / hour sq. m, reduce the number of equipment and pipelines, reduce energy consumption.

Claims (2)

 1. Slurry water clarifier, comprising a casing with feed water inlet and a conical bottom, a renewable filter layer of condensed material, a loading device in the form of a chamber and a sludge discharge device with a drive, a drainage trough in the upper part of the casing, characterized in that it is provided with an inside chambers with a vertical pipe with slots and inclined plates inside and a water distribution device located below the filter layer with holes communicating with the bottom of the vertical pipe, the narrow slurry device is equipped with an electric valve and a control unit connected via an electric cable to the valve actuators and the discharge device, the control unit includes a microprocessor and a medium density sensor installed in the housing, while the upper part of the chamber is made telescopic, and the total area of the openings of the water distribution device is equal to the area cross section of a vertical pipe.  2. The clarifier according to claim 1, characterized in that it is equipped with a flocculant supply pipe connected to the input of the original slurry water to the loading device.