Oily wastewater mainly includes oilfield wastewater, wastewater from oil refineries and petrochemical plants, ballast water, tank washing water, engine room water of tankers, washing water of oil tank (tank) cars, coal plant wastewater, and coking plant wastewater containing coal tar. Wastewater from leather mills and food processing plants contains animal and vegetable oils. If these are directly discharged, they will cause serious pollution to the environment. Our company has a professional research and development team, which is designed for oily wastewater, and designed a vertical flow type dissolved air flotation machine, which can achieve the purpose of removing SS and CODcr.
Brand: Henan Zhonglan Name: Oily Wastewater Treatment Equipment
Air Float Equipment Type: Dissolved Air Floater
Water purification: 1-1000 (m3 / h)
Influent turbidity: 5000 (mg / l)
Turbidity of effluent: 2500 (mg / l)
Working pressure: 0.4 (Mpa)
Dimensions: 3500 (mm)
Equipment weight: 1.8 (t)
Custom processing: Yes
The following is a brief introduction to the company's production of vertical flow dissolved air flotation machines:
The zl-hyws series vertical flow dissolved air flotation sewage treatment machine is a steel structure. Its working principle is that the air is pumped into a pressure dissolved gas tank and is forcibly dissolved in water at a pressure of 05Mpa. In the case of sudden release, The air dissolved in the water precipitates, forming a large number of dense micro-bubble groups. During the slowly rising process, the suspended matter is adsorbed, so that the density of the suspended matter is lowered and floated, thereby achieving the purpose of removing SS and CODcr. This product is suitable for sewage treatment in petroleum, chemical industry, papermaking, leather, printing and dyeing, food, starch, etc. Air-float separation technology refers to the fact that air and water are dissolved into water to a maximum extent under a certain pressure condition, and strive to be in a saturated state, and then the formed pressure-dissolved water is released under reduced pressure to generate a large number of fine bubbles. Full contact with the suspended floc in the water, so that the suspended floc in the water adheres to the micro-bubbles, floats with the bubbles to the water surface, forms scum and scrapes the scum, thereby purifying the water quality. Air flotation water purification technology is widely used at home and abroad. Domestically used air flotation devices include disperse air floatation, electrolytic air floatation, and pressure-dissolved air floatation (hereinafter referred to as traditional air floatation). At present, pressure-soluble air floatation is the most widely used. Dissolved air flotation machine uses clean water or partially treated return water to inhale and mix air through a micro-bubble generator to form dissolved air, which is released under reduced pressure in an air floatation tank. The air dissolved in the water is formed with 20-30 μm bubbles. Precipitation, with a high surface area and adsorption capacity, which can better remove suspended solids of different concentrations of sewage. After treatment, part of the fresh water (design index is 20-40%, usually 30% can be used). It works by air flotation cycle. The pump is pressurized into the water-dissolved gas tank to mix with the air, and the air is dissolved in the water. At this time, the dissolved gas efficiency reaches more than 80%. The air dissolved in the water is released from the water to form micro-bubbles with a particle size of 20-50 μm. The micro-bubbles combine with the suspended matter in the sewage to reduce the specific gravity of the suspended matter in the sewage until it floats on the surface of the water body. The slag is removed by a chain scraper installed on the air flotation tank to achieve the treatment effect.
The air is pumped into the pressure vessel tank, and is forced to dissolve in water at a pressure of 0.5MP. Under sudden release, it generates vigorous agitation and vortex, forming micro-bubbles with a diameter of about 20-80um, which are attached to the wastewater. On the floc, thereby reducing the rising specific gravity of the floc and completely separating the water.
Oily wastewater treatment equipment
The releaser is placed in the central position of the air floater and is a key component for generating microbubbles. The dissolved gas water from the dissolved gas tank is fully mixed with the wastewater here, and it is suddenly released, resulting in vigorous agitation and vortex, forming a diameter of about 20-80um. The micro-bubbles are attached to the floc in the wastewater, thereby reducing the rising specific gravity of the floc. The clear water is completely separated. The structure of the cone is uniformly distributed and connected to the releaser. The main function is to separate the clear water. The sludge and the sludge are evenly distributed in the tank, and the outlet pipes are distributed in the lower part of the tank and connected to the upper part of the tank through an upright pipe. The overflow port does not have a water level adjustment handle, which is convenient for adjusting the water level in the tank. The sludge pipe is installed in the tank. The bottom of the body is used to discharge the sediment. There is no sludge tank on the upper part of the tank. There is a scraper on the tank. The scraper keeps turning and continuously scrapes the floating sludge into the sludge tank and flows into the sludge tank.
The main structure:
Vertical flow type dissolved air flotation machine is mainly composed of the following parts:
1. The round steel structure of the air flotation machine is the main body and core of the water treatment machine. Inside there are releasers, spreaders, sludge pipes, water outlet pipes, sludge tanks, scrapers and transmission systems.
2. Dissolved gas system The dissolved gas system is mainly composed of dissolved gas tank, gas storage tank, air compressor, and high-pressure pump. The dissolved gas tank is the most critical part of the system. Its role is to achieve full contact between water and air and accelerate the air. Dissolve. It is a sealed pressure-resistant steel tank with baffles and spacers designed to accelerate the dispersion and mass transfer of gas and water, and improve the efficiency of gas dissolution.
3.Steel round tanks for pharmaceutical tanks, used for dissolving and storing medicinal solutions. Two of them are dissolving tanks with stirring devices, and the other two are pharmaceutical storage tanks. The volume is matched with the processing capacity.
Oily wastewater treatment equipment
The vertical flow type dissolved air flotation machine is equipped with a high-efficiency gas-dissolving system. The average diameter of micro-bubbles is below 1 μm. Compared with the current level of 20-50ml at home and abroad, it is reduced by at least 20 times. That is, when the amount of dissolved gas is equal, the micro-bubbles The total surface area has increased by at least 400 times. In fact, the total surface area or density of micro-bubbles has increased by thousands of times due to the greatly increased dissolved gas rate. Studies by foreign scholars have shown that when the diameter of microbubbles is smaller than a certain value, according to statistical mechanics, the impact force of the thermal motion of surrounding water molecules will lose balance, and the bubbles will participate in some Brownian motions, which is extremely conducive to the diffusion of oxygen molecules into the wastewater. Therefore, the aeration effect will be more than a thousand times higher. The machine uses a special stainless steel mechanism to achieve unprecedented rectification and steady flow effects, and a special high-efficiency release system to maximize the energy of dissolved gas and water, which means that the dissolved gas is reduced from a deeply balanced high energy value to Low energy value almost close to normal pressure. The equipment has a compact structure, miniaturization and small footprint.
The machine consumes less power and can be reduced by more than 50% compared with ordinary air flotation. Low drug consumption, which can be reduced by more than 50% compared with ordinary air floatation. The scum concentration is high, up to more than 4%, the effluent is clear and transparent, the SS removal rate is over 96%, and all insoluble COD can be removed. The solid-liquid separation speed is fast, the floor space is small, and the energy consumption is low. The sludge has low moisture content, simple and stable operation, and reliable operation.
Papermaking wastewater treatment and fiber recycling;
Dyeing wastewater treatment;
Treatment of wastewater containing various heavy metal ions such as electroplating;
Oily wastewater treatment;
Tannery, chemical, paint, food, pickling and phosphating wastewater treatment;
Separation of biologically treated mud and water;
Low temperature and low turbidity surface water treatment;
Municipal sewage, chemical industry, beverage industry, oil refining industry, food industry, textile industry, slaughter industry, dairy industry, etc., involving suspended matter separation, oil-oil-water separation and purification, coagulation reaction floc separation, activated sludge separation, etc. application.
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