Updated: July 2002

1. Purpose

This system is a processing equipment to clarify and concentrate the washed wastewater drained from the aggregate producing plant. The processing procedure is as follows:
(1) The mixing process: inflow turbid water is mixed well with a flocculent
(2) The flocculation process: flocs produced in the mixing are grown even bigger
(3) The separation process: the resultant flocs are captured. This process includes a clarification and a concentration process. Clarified treated water is usually circulated for reuse. The slurry, which has been concentrated and finished sedimentation, is fed to the dewatering equipment (filter press) in the next process.

Our company's thickener uses an outer ring drive system based on the tire and its product name is"Tyreathlon Thickener".

2. Efficiency and features

Types:

Nine standard types: Dia. 6, 8, 10, 12, 15, 18, 20, 25, and 30 m

Processing capacity:

50 to 2,000 m³/h

Efficiency:

Inflow turbid water of about 50,000 to 100,000 mg/lit. is turned into treated water of 100 mg/lit. or less, and slurry of 400,000 mg/lit. or more, which is the density required for the dewatering process.

3. Characteristics

3-1 Fully-automatic system

(1) Outer ring drive system
For the rake rotation, the outer ring drive system, which wastes no power, has been adopted. Because the outer ring is moved by a fixed tire without moving the position of the driving machine, the system does not misfunction or suffer failures, and maintenance is easy and safe.

(2) Slurry detection and automatic drawing-out
The rake goes up and down automatically according to the amount of slurry which sediments and thus it does not overload. At the same time, the rake also detects the amount of slurry and controls the drawing-out automatically, carrying out stable drawing-out of high-density slurry at all times.

3-2 Stable efficiency

(1) Center feed system
Inflow turbid water is introduced into the feed well located at the center. As a result of this, the entire volume is thoroughly utilized uniformly and most efficiently, and therefore, there are no undue events, such as a short circuit, and stable circulating water and slurry density can be obtained using the minimum amount of chemical agent.

(2) Removal of foreign matter
Foreign matter, such as pebbles and wood chips, which hampers the function of the equipment, is removed completely by the foreign matter removing trommel.

3-3 Chemical agent saving control

The density of the inflow turbid water is measured and according to the changes in the density, the amount of chemical agent to be injected is controlled automatically. As a result of this, there is no wasteful excessive addition and thus the amount of agent used is reduced greatly. In addition, because a proper amount is added, the flocculation action is stable, and at the same time, the quality of circulating water is stable. Thus, the sand classification action at the aggregate plant is also stable.

Thickener

Turbid water treatment system (Whole view)