Ore drawing in concentration tank

1. The function of the air flotation tank is to float up and concentrate. A concentrated sludge layer is formed on the surface of the tank and scraped out of the tank by a mud scraper

the particles that cannot float up sink to the bottom of the tank and are discharged together with the clear liquid drainage pipe at the bottom of the tank; Part of the clear liquid is refluxed and pressurized, and compressed air is pressed into the air dissolving tank to dissolve a large amount of air in water.

2. Adding polyacrylamide flocculant can do water treatment
generally anionic polyacrylamide flocculant
if the water quality is complex and unstable, it can be mixed with cationic polyacrylamide flocculant and inorganic flocculant polyaluminum chloride
what kind of flocculant should be added
you have to do more experiments to compare

3. Thickening tank generally refers to the sludge thickening tank by gravity or dosing agent

2 the thick pool should be a slip of the pen in translation. Although I have studied environmental engineering for more than ten years, I haven't heard of it. You can send me the information you see, and I'll help you see it

after checking, this thickener is the structure of concentrator to concentrate slurry. As you can see in the sewage treatment plant, it should also be used for thickening sludge, but I haven't seen it in the general sewage treatment plant. The suggestions are for reference only

4. Concentration tank is a kind of wastewater treatment structure to rece the water content of wastewater sludge. There is no need to add medicine. It is generally round or square. The water content is reced from 99.2% ～ 99.5% to 96% ～ 98%. The purpose of thickening is to rece sludge volume and facilitate subsequent treatment

according to the working mode, there are continuous type and intermittent type
(1) vertical flow type or radial flow type of concentration tank is generally established for continuous operation. The sludge is continuously fed from the central cylinder and flows vertically or radially to the peripheral collecting tank. The sludge is concentrated at the bottom of the tank and discharged continuously; The clean water is discharged continuously from the collecting tank. The vertical flow tank adopts gravity sludge discharge method, which is suitable for places with small sludge volume. The radial flow tank adopts the mechanical sludge discharge method, and the rotating grid is installed to strengthen the sludge water separation process, which is suitable for the place with large amount of sludge. The HRT of concentration tank is 8 ~ 6h

(2) the concentration tank with intermittent operation is round or square. The sludge enters from one side and settles and condenses when the tank is full. After 5-10h, the supernatant is discharged at different heights, and then the concentrated sludge is discharged from the bottom of the tank. The sludge is discharged by gravity

in addition to the sedimentation concentration tank, there is also an air flotation concentration tank. The dissolved gas water is sent into the tank, and the sludge is solid floating on the surface of the pond by the small bubbles proced by it. The foam layer is formed, scraped out by scrapers, and discharged from the bottom of the sludge for concentrated sludge. The moisture content of sludge concentrated by air flotation is low, about 95% - 97%.

5. The main reason is that the mud from the bottom can play the role of mixing and mixing mud, otherwise the agitator will be added at the bottom of the tank, which will increase the operation cost.

6. Concentrated pool definition: the storage pool in which seawater is put into and evaporated by sunlight.

7. Exhaust excess gas!