Q: What should be paid attention to in the operation of air flotation equipment in winter?

A: Sewage generally contains a considerable proportion of ammonia nitrogen. In winter, the composition of sewage may change due to weather, and some flotation reagents will be added in the sewage treatment process. Pay attention to the ratio of the reagents. After the flotation machine equipment works for a period of time, a layer of scale will adhere to the wheels and bearings of the flotation machine, so the cold weather may cause the scale to increase, so we need to remove it regularly to ensure that the efficiency of the air flotation system does not decrease .

The operation of air floats in winter differs from other seasons in several ways. Winter temperatures are low, especially in northern regions and at high altitudes.

Precautions for the operation of air flotation equipment in winter: In order to avoid the influence of a large amount of undissolved air in the central area on the fluctuation effect, the water level of the air flotation equipment should not submerge the packing layer, and should not be lower than 0.6m. If the water temperature in the air flotation equipment is low, and the air flotation equipment The problem that the low water temperature in the flotation equipment leads to the increase of water viscosity and the reduction of the flotation performance of aeration flocs can be compensated by increasing the dosage to improve the quality of the effluent; The dosage of the whole coagulant can be adjusted according to the slag condition and the effluent quality.

To establish a slag scraping system that meets the actual situation, the slag scraper must be run regularly to remove scum. To know how much area the air flotation equipment can handle, it is necessary to know the decontamination ability of the air flotation equipment in use.

dissolved air flotation equipment is mostly used to treat water with low turbidity, high color, high organic content, low oil content, low surface active substance content or algae-rich water. Compared with other air flotation methods, it has the advantages of high hydraulic load and compact tank body.

1. Pay attention to the status of waste water. Freeze in winter. If it's thin ice, it doesn't matter if the machine works or not. If there is ice thicker than 10mm, it should be melted or broken before running the machine. Thick ice will wear off the air-floating parts, causing damage or falling off of mechanical parts, and the cost of use is too high.

2. In winter, the air flotation moving parts are stiff, the lubricating effect of lubricating oil and hydraulic oil decreases, the movement of mechanical parts is blocked, and the friction force increases. The efficiency of mechanical operations decreases and the degree of component wear increases. Low viscosity lubricating or hydraulic oils are generally used in winter to minimize clogging problems.

3. In winter, the microbial content in the water is low, and the air bubbles generated after the air flotation operation are relatively reduced. It is necessary to increase the air flotation operation time to make up for the deficiency.

Running air flotation in winter

At that time, when the air flotation equipment was used in winter, the actual operator had to check whether the waste water inlet pipe was frozen at that time when working every day. If it freezes, it should be cleaned immediately to prevent abnormal operation of the equipment due to freezing. Centrifugal pumps should be carefully considered before working, and grease should be added when operating failures are found. Also check the tightness of the filling material, check the air tightness of the gate valve, and check the car oil level of the air compressor. If the fuel level of the car has decreased significantly, it must be refueled.

Scraper is the key component of air flotation equipment. All air flotation equipment applications are compromised if the scraper is not functioning properly. Therefore, before the equipment is operated, it is necessary to check whether the scraper of the scraper is hard and damaged, and whether it can drive the system normally. The gas filter water is an important part of the air compressor. It is easy to freeze in winter. Carefully consider whether it freezes before starting. If it freezes, it should be removed immediately. When starting, listen to the air compressor for noise or unusual heat. If there is an abnormal situation, it should be stopped for inspection to prevent mechanical equipment safety accidents during the entire use of the air flotation equipment.

Before winter starts, carefully consider each gate valve and pipe, check whether the gate valve is in the correct power switch, whether it is frozen, whether the pipe is blocked, whether there is a leak or whether the metal sheet is bent. Storage Storage of coagulant aids is an important piece of equipment to check before start-up. The key to daily inspection is to look for freezing and living damage. During regular maintenance, samples should be taken for template analysis to confirm whether the coagulant aid is abnormal.

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