Air floater The air flotation machine is a device that removes suspended solids, grease and various gels from various industrial and municipal sewage. The equipment is widely used in the treatment of industrial wastewater and municipal sewage such as refining, chemical, brewing, slaughtering, electroplating, printing and dyeing. Divided into dissolved air: inflatable air flotation machine, dissolved air flotation machine and electrolytic air flotation machine. The principle is to efficiently mix a gas that is difficult to dissolve in water or two or more different liquids (to produce a fine particle diameter of 20 to 50 μm). The microbubbles are used as a carrier to adhere the impurity particles in the water, and the particles are floated up to the water surface and separated from the water by the bubble entrainment to achieve the purpose of solid-liquid separation. Analysis of the process principle and process of air flotation device 1.1 Process principle and process 1. The raw water enters the mixing reactor, and a medicament (deoiling agent or coagulant) is added to the mixing reactor to form a separable floc; 2. The pretreated sewage enters the air flotation device and is mixed with tiny bubbles (bubble diameters ranging from 30 to 50 um) released in the inlet water and gas-water mixture. These tiny bubbles adhere to the flocs in the sewage to form an air floating body having a specific gravity lower than that of water. The air floating body rises to the surface of the water and condenses into floating oil (or scum), and is scraped by the scraping oil (slag) machine to the oil collecting (slag) tank; 3. The heavier solid particles in the inlet chamber are precipitated here and discharged through the sand discharging valve. The system requires that the sand discharging valve be periodically opened to keep the inlet chamber clean; 4. The sewage enters the water distribution area of ​​the air flotation device, and the rapidly rising particles will float to the water surface; the slower rising particles are separated in the corrugated swash plate, and once a particle contacts the corrugated swash plate, it can counter the water flow under the action of buoyancy. Rising direction 5. All heavy particles will sink, and the sinking particles will be collected by the bottom scraper and discharged by periodically opening the mud valve. See the ADNF process flow diagram, see Figure 3-3. 1.2 tubular mixing reactor The High Efficiency Tubular Dosing Reactor (PFR) consists of three specially designed mixing tubes with Coagulant, Flocculant and dissolved air bubbles, designed to control the mixing energy and mixing time of each pipe section. In order to achieve zui optimized coagulation effect. Features of the high efficiency tubular dosing reactor (PFR): 1. Since the mixing energy and time in the pipeline are easy to control, the coagulation and flocculation reactions are stable, and uniform flocs can be formed; 2. Since the dissolved air bubbles are added to the pipe section, the air bubbles can be incorporated into the interior of the floc, and the combination with the flocs is tight; 3. Since the dosing point is in the middle of the pipe section, the consumption of the water treatment agent can be reduced to less. 4. There is no reverse mixing in the pipeline, short circuit and short flow phenomenon occur; 5. Compared with the traditional tank-type dosing coagulator, the mixing energy is not required, and the energy consumption is reduced; 6. No moving parts, easy maintenance and operation. 1.3 slant plate air float working principle The ADNF air-floating separation system is separated by a slanting inclined tube, and the slanting inclined tube is widely used in the sedimentation tank. It is based on the theory of the submerged pool, placing a plurality of sloping plates at an angle to the horizontal plane in the pool. The water flows through the sloping plate, the heavy solid sinks to the bottom of the sloping plate, and the light solid floats on top of the sloping plate. Thereby achieving solid-liquid separation. The laminar flow is maintained due to fluid flow between the plates. The particles can reach the zui near board without interference. Once the particles touch the plate it will begin to flow countercurrently. According to the velocity distribution of the laminar flow mode, the velocity of the water flow on the plate is 0; therefore, the countercurrent of the particles is actually unimpeded. 1.4ADNF air flotation characteristics 1. The ADNF air flotation device is an integrated device that integrates the reactor, the pool body, the dissolved gas tank and the dissolved gas pump. Zui saves a lot of space, runs in semi-closed or fully enclosed mode, fully automated operation, and easy to run and manage. 2. The ADNF air flotation device is designed according to the characteristics of the air flotation process, and the advanced tubular mixing reactor is designed to make the mixing and reaction complete quickly through the pipeline. At the same time, part of the dissolved water is directly added to the reactor, and the microbubbles participate in the reaction and agglomerate to produce "copolymerization", so that the air floating body grows up rapidly and becomes more stable. From the practical application effect, this method can not only save the medicine, but also make the mixed reaction effect more ideal. 3. The ADNF air flotation device adopts the inclined plate inclined pipe separation system. In a short residence time (5-10 min), the solid-liquid separation is thorough, the effect is stable, and the influence of the raw water fluctuation is small. At the same time, the air floatation pool is higher and the floor space is smaller. 4. The ADNF air flotation device adopts an advanced dissolved gas system and a gas-water balance control system. The dissolved gas tank has high dissolved gas efficiency and a constant liquid level in the tank. The volume of the dissolved gas tank is only one-sixth of the volume of the conventional dissolved gas tank. 5. The ADNF air flotation device uses a proprietary dissolved gas release device that releases the microbubble diameter to be controlled within a certain range, while its wide flow path design makes it completely clogging. 6. The ADNF air flotation device has a complete slagging, mud discharging and sand discharging system, and is fully automatic controlled, so that it is not affected by human operation. 7. The ADNF air flotation device uses nitrogen gas to solve the problem of accelerated corrosion caused by excessive dissolved oxygen content. 1.5 Inlet and outlet water quality indicators Influent: oil content <3000mg/L Effluent: oil content <10mg/L, suspended matter <20mg/L Removal rate: oil >90% Gelatin Size 00 Empty Capsule,Hard Empty Gelatin Capsules Size 00,Halal Certificated Vegetable Empty Capsules,Empty Separated Halal Gelatin Capsule Ningbo Jiangnan Capsule Co., Ltd. , https://www.ningbocapsule.com
