Flotation purification of water is a relatively new water treatment technology in the current international. The principle is to introduce a large number of tiny air bubbles in the sewage to bubble adhesion by surface tension on small suspended solids, the formation of the status of the overall specific gravity of less than 1, according to the principle of buoyancy to the surface to achieve the solid-liquid separation, the sewage will be purified.
The traditional dissolved air flotation due to a fatal flaw in the design of the structure, the processing capacity is very low residence time of sewage in the flotation takes 40-60 minutes, the device size is very large, and the purification rate is very low, is now eliminated. The emergence of super-efficiency Air Flotation water purifier is a major breakthrough in the flotation water purification technology. Change it to position the water, the dynamic water for the dynamic water, still water, the use of the principle of "zero speed", so that the vertical float to the surface of the flotation body in a relatively static environment, floating away to minimize and not subject to the effluent flow rate theoretical pool depth is only about 450mm, the residence time of sewage in the flotation machine in just 3-5 minutes, significantly reducing the equipment size. Combined with uniform bubble distribution, flotation dead zone, the advantages of small scraper device on the water disturbance, a substantial increase in purification rate.
CXQF ultra-efficient shallow ion flotation machine successfully developed, another major breakthrough in the flotation water purification technology, and a qualitative leap. This product is a variety of significant improvements made on the basis of the super-efficiency Air Flotation is a special structure and efficient dissolved air device and the efficient equilibrium eliminate energy systems. The rate of dissolved gas to reach the theoretical maximum value and the concentration gradient. Measurement and calculation according to formula Sixtus Alex, the average diameter of the microbubbles only about 1um, compared with the present 20-50um levels reduce at least 20 times, that is the equal of the dissolved gas, microbubbles total surface area of at least increase more than 400 times.
In fact, a substantial increase in the rate of dissolved air, the total surface area of micro-bubbles or bubble density increased a thousandfold. Foreign scholars study shows that: when the diameter of the microbubbles is less than a certain diameter, according to statistical mechanics, the impact force of its thermal motion of surrounding water molecules out of balance, the bubbles will be involved in part of Brownian motion, be of great help to the oxygen molecules inside the bubble to the sewage diffusion, therefore aeration effect will be far more than thousands of times higher! On the other hand, the ionization of the dissolved contaminants, is a is a reversible reaction under dynamic equilibrium, the polar water molecules and surrounded by electric double layer of organic suspended solids will promote ionization and high-density, small diameter bubbles in reversible reaction will lead to a certain extent, offset to the direction of generating compound. Plus some not fully understood the mechanism CXQF ultra-efficient shallow ion flotation machine is not only suspended solids removal efficiency up to 99.8%, and soluble COD removal efficiency of up to 45% -73% is have the international advanced level of ion flotation machine.
CXQF ultra-efficient shallow ion flotation machine, there is another big advantage: due to the minimal diameter of microbubbles, high density, can fully capture a very small suspended solids, without prior flocculating great alum , it can greatly reduce the dosage of a number of occasions, and even from time to dosing operation, greatly reducing operating costs.
Second, the technical parameters
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型号
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CXQF-4
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CXQF-5
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CXQF-6
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CXQF-7
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CXQF-8
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CXQF-9
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CXQF-10
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CXQF-11
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CXQF-12
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大处理量m3/d
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1500
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2200
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3000
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4500
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6000
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7500
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10000
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12000
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15000
|
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直径mm
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4000
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5000
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6000
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7000
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8000
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9000
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10000
|
11000
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12000
|
|
圆盘总高度mm
|
1100
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1100
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1100
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1125
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1150
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1150
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1200
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1200
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1200
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Note: The maximum processing capacity for reference only, the selection shall be determined according to the concentration of sewage
Third, the device characteristics
1, purification pool, but left the enough scum reserve space, especially for high concentrations of sewage treatment
2, the processing capacity, surface loading 10m3/m2h.
3, small footprint, or not an area of overhead, stacked or set up on buildings.
4, the water level and depth of scraping residue can be adjusted, flow range, blowing the scum containing solid rate.
5, the assembled structure, easy to transport, installation and relocation.
6, rigid, only a "well-shaped concrete beams support without the need to build a platform for civil engineering costs.
7, carbon steel (stainless steel of the key parts), part of the stainless steel, stainless steel three types. Carbon steel all a sandblasting with a special heavy anticorrosion to acid and alkali corrosion, the use of ten years in good condition as new.
8, the rotary joint high-tech patented technology, maintenance-free, wear adjustable, long-term operation of the watertight, is a permanent design.
9, bearings and other critical components calculated by the life and industrial practice assessment, the failure rate is very low, low maintenance costs. Drive, scraping mud motor with sufficient margin to ensure long-term continuous operation, but hot.
10 devices, balanced energy dissipation system full stainless steel construction, no moving parts, no cleaning, no maintenance, will not clog.
11 moving parts and multiple protection in the open air long-term reliable operation.
12, a lubricating device, less maintenance, and management is simple.
Fourth, the scope and effect of
This equipment is widely applicable to urban sewage and White Water, waste paper pulping, pulp and middle of the wastewater, printing and dyeing, chemical, food, brewing, tanning, oil refining, pharmaceutical and other industrial wastewater treatment, in many cases can replace biochemical, only a physico-chemical treatment to achieve the purpose of reuse or discharge standards, can also be used for the pretreatment of the water plant. The equipment can significantly reduce investment and operating costs, and save a lot of arable land for urban sewage treatment is particularly significant.
Engineering practice: water the SS ≤ 6000mg / L; PH value 5.5 ~ 10:00; effluent SS ≤ 30mg / L for waste paper and paper wastewater: influent CODcr ≤ 3000mg / L, the effluent CODcr of: 50 ~~ 200mg / L, The Pulping wastewater: water CODcr ≤ 2000mg / L, water CODcr of: 150 to 450mg / L; of BOD5 removal efficiency of 60% to 80% color removal of about 80%.
Five, the process
Dissolved air system
↓
Sump → sewage pump → ion flotation → water emissions,
↓
Reuse the pulp residue recovery
