THAF Aerator Overview:
   Aerator is an integral part of air flotation equipment and an essential part of air flotation equipment. The aeration efficiency of aerator is directly related to the air flotation effect of air flotation equipment. A complete set of air flotation equipment should include several basic units such as air flotation tank, aeration equipment (aerator), slag scraping equipment and slag removal equipment. Flotation tank can be made of steel or concrete, our company can provide detailed size and other related equipment.
The following picture shows the aerator installed on the steel tank:

The following picture shows an aerator installed on a concrete tank

1. Use of air flotation aerator in sewage treatment
    In sewage treatment, removal of suspended solids in sewage is the first step of sewage treatment, which is usually referred to as pretreatment, and cavitation flotation machine * is suitable for sewage pretreatment. Air flotation treatmentcan remove most suspended solids (more than 80%) and a small part of COD and BOD. Strictly speaking, the treated sewage can only be used as the pretreatment of secondary and tertiary (biochemical treatment). But pretreatment is a necessary step of sewage treatment, and the result of pretreatment is directly related to the effect of subsequent biochemical treatment. Therefore, air flotation machine is an essential general environmental protection equipment in sewage treatment.
THAF series cavitation air flotation machines are specially designed to remove grease, colloids and suspended solids from industrial and municipal wastewater. The device can automatically separate these substances from wastewater and make them suitable for separate treatment. Since the presence of these substances can greatly reduce the efficiency of wastewater treatment, it is essential to remove these substances in advance by pretreatment machines.
THAF cavitation air flotation machine is specially designed according to the needs of industry. It is not only high efficiency, simple equipment, but also easy to operate and maintain. It is especially suitable for the national conditions of China and is the best way for wastewater treatment in industry. THAF cavitation airfoils not only enjoy a high reputation in the United States, but also have a wide range of applications all over the world. With the current government's increasingly stringent wastewater discharge requirements, industrial enterprises are facing increasing pressure, THAF air flotation machine is the best choice to get the plant out of this situation.
THAF aerator is an important unit of cavitation air flotation machine *. The aeration function of cavitation air flotation machine is realized by cavitation aerator.
THAF vortex concave adapt to industries: paint, leather, oil refining, printing and dyeing, chemical, dairy processing, fiber production, paper, food, beverage, slaughter, textile, mechanical processing, municipal sewage, etc.
Effect of vortex aerator applied to steel pool


2. Product profile
THAF series cavitation aerators are the main products of Qingdao Qingtian Environmental Engineering Co., Ltd. Since its establishment in 1995, it has produced more than 1500 sets of cavitation aerators of various specifications. Qingtian Company is a domestic manufacturer specializing in the production of cavitation aerators and cavitation aerators. It has a production history of nearly 20 years. The products are mature in technology, stable in performance, reliable in quality, and oriented to major environmental protection design companies, engineering companies and * end users. 

3.Working principle of THAF cavitation air flotation aerator
Raw sewage first enters a small aeration stage equipped with a vortex aerator. Sewage flows through the aeration section as it rises, where it mixes well with microbubbles generated by the aerator. Aerators transfer air from the surface to the bottom of the water through exhaust pipes. The working principle of the aerator is to form a vacuum zone in the water by using the high-speed rotation of the diffuser impeller at the bottom of the air conveying pipe. The air on the liquid surface is input into the water through the aerator to fill the vacuum. Microbubbles are generated and spiral up to the water surface. The oxygen in the air also enters the water.
Because of the density imbalance between the gas-water mixture and the liquid, a vertical upward buoyancy force is generated, which carries the solid suspension to the surface. In the process of floating, microbubbles will attach to the suspended matter. After reaching the water surface, the solid suspended matter will rely on these bubbles to support and maintain the water surface, and will be removed by radial airflow thrust.
Suspended solids floating on the water surface are removed intermittently by chain scrapers. The scraper moves along the entire liquid surface and pushes the suspension from the inlet end of the flotation tank to the outlet end. Scraper blades are fixed to the ends of the chain. The sludge scraper is a gear driven by a gear reducer mounted on one side of the tank. The scraper moves along the entire width of the tank, scraping the floating suspension onto the inclined metal plate and pushing it into the sludge discharge pipe. There is a horizontal screw propeller (slag remover) in the sludge discharge pipeline, which sends the collected sludge to the sludge collector (slag remover). The screw propeller (slag remover) is also driven by a reducer. The purified sewage enters the overflow tank through an outlet under the metal plate before being discharged. The overflow tank is used to control the water level of the air flotation tank to ensure that the liquid in the tank does not flow into the sludge discharge pipe. nbsp; 
4.Advantages of THAF series vortex air flotation aerator
A.& nbsp;    Save investment
THAF cavitation aeration machine can remove grease, suspended solids, BOD and COD in sewage. Setting this machine in front of biochemical secondary sewage treatment plant can greatly reduce the scale of treatment plant, thus greatly reducing the overall investment cost. Rotary flotation does not need pressure vessels, air compressors, circulating pumps and flocculation equipment, thus greatly reducing the investment costs of sewage pretreatment.
B.& nbsp;     Low operating costs
The whole cavitation aeration equipment only needs the power of a few ordinary motors. This is something that other air carriers cannot compare to. Maintenance and manual operation are minimal.
C.& High     efficiency
In contrast to conventional grease collectors (gravity settling tanks and separation tanks), CAF machines automatically and continuously remove solid sludge from wastewater. Sludge removal and storage is carried out in a concentrated manner, thus reducing the cost of sludge treatment.
D.& Easy to    operate
THAF cavitation aerators are very easy to operate, with no complicated machinery or human intervention. The whole machine is composed of only two mechanical parts, unlike the dissolved air flotation machine, which includes many necessary equipment such as pressure vessels, air compressors and circulating pumps. Do not need to clean the nozzle and dissolved gas release device, can be started immediately, can be closed frequently
E.& Good working environment, no noise.
The treatment of wastewater by THAF air flotation aerator is an aerobic process. The odor problem generated by the grease trap (gravity settling tank and separation tank) has been well solved. On the other hand, the power of the equipment is very small, and there is only a slight motor sound when running, and there is no noise pollution.

F.& nbsp;      Affordable
THAF type aerator is simple in design, good in matching, and very few in civil works for the machine. It is very attractive from the point of view of investment. Due to its simplicity and integrity, it can be installed on the ground, underground or high and takes very little time.
Therefore, THAF cavitation aeration machine is not only simple equipment, but also very easy to operate and maintain, especially suitable for China's national conditions, is the best choice for industrial and municipal wastewater treatment. In addition, compared with other traditional air flotation technologies, both in terms of operating costs and ease of operation, have strong advantages. nbsp;

5, THAF aerator specification parameters
THAF series vortex aerator is divided into two models, long aerator is suitable for treating sewage flow greater than or equal to 25 cubic meters per hour. The short aerator is suitable for sewage flows of less than 25 cubic meters per hour. Each model is divided into ordinary carbon steel or stainless steel according to different materials, users can choose according to the actual situation of sewage corrosivity. Short aerator motor power 1.5kw motor, speed 1400r/m; long aerator motor power 2.2kw motor, speed 1420r/m; if used in special industries, such as oil refining users can choose anti-exposure motor, see the table below:
THAF Vortex Cavitation Aerator Parameter Table

Description: 1, the treatment of 75T/H below the use of an aerator, 100-175T/H using two aerators, 200-320T/H using three aerators, and so on.
2, equipment * large pool depth has no strict requirements, specific can be handled according to the actual situation.

6, THAF series aerator operation precautions
1) Aerator must be running forward, when there is no water in the tank, it is forbidden to open the aerator.
2)  The machine should always pay attention to whether there is noise during operation. If there is noise, stop it immediately.
Check whether the coupling between motor and aerator is damaged or whether the rubber joint is damaged. If the rubber joint is damaged, it must be replaced immediately.
3) If there is noise after replacing the rubber joint, check whether the underwater bearing or mechanical seal of the aerator is damaged or flooded, and immediately stop the machine for maintenance or contact the manufacturer.
4)  If the aerator does not aerate, check whether the aerator rotates in reverse and the impeller is blocked. If it is reversed, adjust the motor rotation to positive rotation (switch the power line); clean the impeller outlet.
enterprise profile
Qingdao Qingtian Environmental Engineering Co., Ltd. was established in 1995, is a subsidiary of Qingdao Spark Group, is a Sino-foreign joint venture, in the Spark Group strong R & D technology and processing equipment support, has become one of the domestic environmental protection products and equipment manufacturing base. Mainly engaged in various water treatment technology research, equipment manufacturing, engineering design and construction. The company's main products are various series of cavitation flotation machine, dissolved air flotation machine, belt filter press (concentration), scraping suction mud machine, scraping oil scraper mud machine, chlorine dioxide generator, filters and other dozens of varieties.