Equipment for clarifiers
Tha bar mixer is intended for intensification and increase of the thickening process in sludge thickeners.
Main elements of default design:
Proposal request should include:
When placing an order, drawings with THE correct dimensions of the tank, delivery- and lateral pipelines should be provided.
Bar mixer scheme
1. Bridge and safety handles with entrance stairs
Bridge and safety handles with entrance stairs (picture 1 on the scheme) are manufactured from aluminium alloy, which has a high strength index and corrosion resistance. Due to this, there is no need for expensive painting.
The bridge is a supporting structure and working elements are hung from it. For clarifiers with diameter larger than 15 m, it is propped up by a supporting column (position. 6). It is possible to install supports underneath the sludge thickener cover as an option (position 12). For this, an additional agreement with the cover supplier has to be made. By default, the handles are mounted on the bridge so as not to limit the access to the drive unit chamber.
2. Bar frames
Two bar frames, each equipped with mixing bars, (position 2) are the main working elements of the mixer. Their shape, as well as the distance between them, are designed to create drain channels in the sludge through the motion. This separates pore water and gases from the sludge.
In addition, bar frames can be equipped with one or two sludge collection units (position 7). Steel scrapers equipped with a rubber attachment is a working element of this unit.
Thickener frames (position 2) are connected to the rotary frame (position 3) with a toothed crown wheel of the support rotating device. The crown wheel is driven by a toothed gear fitted on the geared motor's shaft.
The electric control cabinet (position 5) and light bulbs are mounted on the platform of the scraper. The cabinet allows the operator to switch the scraper on and off; both manually or remotely (remote Start-Stop), as well as to indicate equipment status with an alarm.The mixer is supplied with variable speed drive which allows adjustment of the scraper speed.
5. Floating solids removal
This unit consists of the scraper (position 8), that moves floating solids out of the clarifier, and an additional scraper that removes floating solids directly to the bunker (position 9). The bunker is equipped with a nozzle that allows connection to the discharge system.
6. Overflow tray system
This system (position 9) can be manufactured in the following options:
One of the tray segments acts as a connector with the withdrawal system at the same time.
7. Wastewater supply unit
Wastewater is supplied by a pipeline, situated under the bottom of the tank (position 11b) or mounted under the bridge (position 11a).