1. Domestic sewage and urban sewage
Domestic sewage is mainly the discharged water generated by various kitchen water, washing water and toilet water used in human life, mostly non-toxic inorganic salts. Sewage generated in the process of human life is one of the main sources of water pollution. Mainly feces and washing sewage.
2. Metal smelting wastewater
The cooling water from ironmaking, steelmaking, steel rolling and other processes, as well as the water from pouring castings and rolled pieces, are not very polluting; Washing water is a waste water with many pollutants. For example, the waste water from dust removal and flue gas purification often contains a large amount of suspended solids, which can be recycled only after sedimentation by sewage treatment equipment. However, acidic waste water and water containing heavy metal ions are polluted.
3. Coking gas wastewater
Coking plants, urban gas plants, etc. produce seriously polluted wastewater during coking and gas production, which contains a large number of impurities such as phenol, ammonia, sulfide, cyanide, tar, etc., and can produce various pollution effects.
4. Machining wastewater
It mainly contains impurities such as lubricating oil and resin, waste liquid and flushing water discharged from machining various metal products, as well as various metal ions such as chromium, zinc and cyanide, which are highly toxic. Electroplating wastewater is one of the controlled industrial wastewater, which involves a wide range and is highly polluting.
5. Wastewater from petroleum industry
It mainly includes oil exploitation wastewater, oil refining wastewater and petrochemical wastewater. Oily wastewater is discharged from the crude oil produced in the oilfield during dehydration treatment. This wastewater also contains a large amount of dissolved salts, and its specific composition is related to the geological conditions of oil-bearing strata.
Under the automatic operation mode of the screen cleaner, the screen is automatically controlled by the time or the liquid level difference before and after the screen. The grid trash remover can adjust the running interval of the equipment at will according to the user's needs to achieve periodic operation. The screen trash remover can not only be widely used in urban sewage and industrial wastewater treatment of floating and suspended solids, but also can be used to eliminate the sewage in the pump station. It is an ideal equipment for water source treatment. In addition, it is a new type of trash remover researched, developed and manufactured by our company after digesting foreign technologies and combining the specific conditions of domestic sewage treatment projects.
The screen trash remover is mainly composed of the frame, dynamic and static screen groups, driving device, transmission mechanism, control and other parts. Its working principle is to control the driving device placed on the upper part of the screen to drive the transmission mechanism and dynamic screen groups to alternately move relative to the static screen groups through the command of the electrical control system. The floating objects in the water are intercepted by the stepped tooth surfaces of the dynamic and static screen groups, and slowly and step by step lifted to the outlet of the screen slag discharge, Realize the purpose of blocking dirt and cleaning slag. It is recommended to select GSLY rotary grid trash remover for rural sewage treatment. The rotary grid trash remover is a special water treatment equipment that can continuously and automatically intercept and remove sundries of various shapes in the fluid. In the front process of sewage treatment, it can intercept and remove various solid particles, floating objects, etc.
Rotary screen trash remover. The screen can be divided into fine screen and coarse screen. The clearance of the rake teeth is divided into 1mm, 3mm, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm and other specifications. The clearance of the bars is determined according to the type, flow rate of sewage and the type and size of representative debris. The general selection range is as follows: mechanical cleaning: 3~25mm; Manual cleaning: 5~15mm; Screen: 0.1~2mm. In large and medium-sized sewage stations, two mechanical gratings shall be set: coarse grate: 10~40mm, fine grate: 3~10mm (15mm+4mm combination for large sewage treatment plants). In the small sewage station, it is enough to set a grid, and the gap between grid bars should be 3~15mm (15mm for manual grid and 5mm for mechanical grid).
Grille trash remover is an important equipment in sewage treatment, which can remove various impurities and automatically separate solid from liquid. It is not blocked during operation. The grid plates with teeth are connected by shafts to form chain plates, which move upward together under the drive of the motor. Low noise and power consumption.
The screen dirt remover is a solid-liquid separation equipment that can continuously remove impurities in the fluid. It is an indispensable special equipment in the production process of urban sewage treatment, waterworks, power plant intakes, textiles, food processing, paper making, leather and other industries. It is a solid-liquid screening equipment widely used in China at present. The equipment can adjust the equipment operation interval according to the user's needs to achieve periodic operation; The start and stop of the equipment can be automatically controlled according to the liquid level difference between the front and back of the grid; It also has manual control function to facilitate maintenance. Users can choose at will according to different work needs. Due to the reasonable structure design of the equipment, it has a strong self purification ability when the equipment is working and will not be blocked, so the daily maintenance workload is small.
