Domestic sewage pretreatment device with electromagnetic liquid level meter

Abstract

The invention discloses a domestic sewage pretreatment device with an electromagnetic liquid level meter. A cabinet body is provided with a circulating suction port and a circulating injection port, the circulating suction port is communicated with a pump inlet of a crushing discharge pump, the circulating injection port is communicated with a pump outlet of the crushing discharge pump, and the pump outlet of the crushing discharge pump is also communicated with a discharge port. The inner side plate surface of a wall plate of the cabinet body is plated with a zinc coating, the zinc coating iscoated with an epoxy asphalt paint layer, the outer side plate surface of the wall plate of the cabinet body is coated with an anti-corrosion primer layer, and the anti-corrosion primer layer is coated with an anti-corrosion finish paint layer. Three liquid level controllers are arranged on the cabinet body at intervals in the height direction, sensor guide pipes of the liquid level controllers are fixedly installed on the cabinet body, liquid level sensors are fixedly arranged in pipe cavities of the sensor guide pipes, the sensor guide pipes are movably sleeved with liquid level floating balls, and liquid level magnets are fixedly installed in ball cavities of the liquid level floating balls. The treatment device is high in sewage corrosion resistance and sensitive and reliable in liquid level detection.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a cabinet for storing, transferring and pretreating domestic sewage from ships. Background technique [0002] With the rapid development of social economy and the increase of population, the discharge of domestic sewage is increasing, which has become a serious obstacle to economic development and the improvement of people's quality of life, so it has been widely valued by people; domestic sewage has become the main source of pollution of water bodies, The discharge of domestic sewage from land residents such as cities, villages and towns directly affects people's living environment and the degree of water pollution; the discharge of domestic sewage from ships in inland rivers and lakes will lead to deterioration of water quality; the discharge of marine engineering equipment and domestic sewage from ships will seriously affect The marine environment. For this reason, p...

AI Technical Summary

Problems solved by technology

The sewage cabinet is welded by steel plates. Due to the complex composition of sewage, it is highly corrosive to the steel plates, which can easily cause corrosion and damage to the cabinet wall, which seriously affects the service life of the sewage tank.

Existing sewage storage cabinets use electrode-type liquid level controllers. This electrode-type liquid level controller has the problem that the detection electrodes are easily corroded by chemicals or scaled on the surface of the electrodes, which reduces the sensitivity and reliability of the electrodes, and even There is a short circuit or failure; and there are many mechanical connections in the float type liquid level controller, which not only has low sensitivity, but also is prone to malfunction and poor reliability.

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