02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 Introduction of air flotation machine 02 02 02 Air flotation machine is a dissolved gas system that generates a large number of fine bubbles in water, so that the air is at a height The dispersed form of tiny bubbles is attached to the suspended matter particles, causing the density to be less than water. The principle of buoyancy is used to float them on the surface of the water, so that solid-liquid separation is realized. Air flotation machines are divided into ultra-efficient shallow air flotation machines, vortex concave air flotation machines, and advection air flotation machines. Currently, it is used in water supply, industrial wastewater and municipal sewage treatment. The advantage of air flotation machine is that its solid-liquid separation equipment has the characteristics of low investment, very small footprint, high degree of automation, convenient operation and management, etc. Working principle 02 02 02 02 Dissolved air flotation machine is a type of air flotation. It uses the characteristics of different solubility of water under different pressures to pressurize and aerate all or part of the water to be treated (or treated), increasing the air solubility of the water, and passing through the coagulant In water, released under normal pressure, the air precipitates to form small bubbles, and adheres to the impurity floats, so that the overall density of the flocculates is less than water and rises, so that the solid-liquid separated sewage after the dosing reaction enters the air-floated mixing zone, mixes and contacts the released dissolved gas water, so that the flocculant adheres to the fine bubbles, and then enters the air flotation zone. The flocculant floats to the surface of the water to form scum under the action of air buoyancy. After the clean water in the lower layer flows to the clear water pool through the water collector, a part of the reflow is used as dissolved gas water, and the remaining clean water flows out through the overflow port. After the scum on the surface of the air flotation tank accumulates to a certain thickness, it is scraped into the sludge tank of the air flotation machine by the scraper and discharged. Process flow of air flotation device: 1. Raw water enters the mixing reactor, and the agent (degreaser or coagulant) is added to the mixing reactor to form separable flocculation; 022. The pretreated sewage enters the air flotation device, and the tiny bubbles (bubble diameter range 30-50um) released in the sewage and gas-water mixture in the water inlet chamber are mixed. These tiny bubbles adhere to the floc in the sewage, forming an air float with a specific gravity less than water. Air floating body rises to the surface of the water to condense into oil slick (or scum), through the oil scraper (slag) machine to the oil collection (slag) tank; 023. heavy solid particles in the water inlet chamber precipitate here, discharged through the sand discharge valve, the system requires regular opening of the sand discharge valve to keep the inlet room clean; 024 sewage enters the distribution area of the air flotation device, the rapidly rising particles will float to the surface of the water; Slow particles separate in a corrugated swash plate, and once a Particles come into contact with the corrugated swash plate, under the action of buoyancy, it can rise against the direction of water flow; 02. all heavy particles will sink, the sinking particles will be collected by the bottom scraper, and discharging the air flotation machine by regularly opening the mud discharge valve Operation Precautions 1, Before operating this equipment, you should carefully read the instruction manual of this equipment and related mechanical and electrical supporting products. It is strictly forbidden to operate this equipment without professional operation training. 2. When starting the air flotation equipment, the outlet control valve (12) should be in the closed position, then the water pump (10) should be started, and the outlet control valve (12) should be gradually opened. 3. When the air flotation equipment stops running, the dissolved gas water outlet control valve (18) should be closed before the pump (10) can be stopped, and then the inlet control valve (9) should be closed. Otherwise, the compressed air may fly directly into the air flotation tank and damage the scum layer. 4. During the floating operation, we should always pay attention to whether the equipment components are operating normally. If a problem is found, the operation should be stopped and checked until the fault is completely eliminated before starting again. 5. Regularly lubricate the reducer, water pump and air compressor according to the relevant equipment instructions. 6. When working on the slag scraper and related chain transmission system, please pay attention to strict safety protection. 7. The air flotation tank should be cleaned after it has been in operation for a period of time. Rinse once every 20-30 days in summer and 50-60 days in winter. 8. If the dissolved gas pump is discontinued for a long time, the water inside the pump should be emptied, and more attention should be paid to anti-freezing in winter. Qianyu Wangpu https://24562.qianyuwang.com/