Ship domestic sewage treatment device with pre-separation tank

Abstract

The invention discloses a ship domestic sewage treatment device with a pre-separation tank. The ship domestic sewage treatment device is characterized in that: a pre-separation tank (15) is arranged between the output port (38-1) of a settling cavity (38) and the input port (10-1) of a precision filter (10); the pre-separation tank is communicated with the output pipeline of the settling cavity (38) through a clean liquid inlet (27); a filter bag (29) is hermetically connected with a tank body; a cleaning wave wheel (30) is arranged on the exterior of the filter bag in the tank body and connected with a rotating shaft of a cleaning motor (28) through a shaft rod and a connecting sleeve (31); a suction pipe of a suction pump (13) is communicated with the filter bag through a flange, and anoutput pipe (12) of the suction pump is communicated with the upper cavity of the precision filter; and the inner bottom of the pre-separation tank is communicated with a crushing cavity (35) througha return pump (17) and a cleaning water return pipe (4). The ship domestic sewage treatment device has a more reasonable and compact structure, is convenient to maintain, has small volume, light weight and high working efficiency, and can work safely for a long term.

Description

technical field [0001] The invention relates to a water treatment environmental protection device, in particular to a marine sewage treatment device with a pre-separation box. Background technique [0002] At present, when domestic sewage treatment devices on ships process domestic sewage (human waste liquid and flushing water), they usually adopt crushing disinfection and biochemical treatment, and then add chlorine-containing chemicals to sterilize and discharge. This is easy to cause secondary pollution. Due to the poor control of the dosage, the drainage exceeds the standard, and the Escherichia coli does not die, and the number of bacteria exceeds the standard. Adding too much residual chlorine exceeds the standard, which also affects the chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) exceeding the standard. No matter how much you add or how little you add, it doesn't meet the discharge water requirements. Especially from January 1, 2010, the Inter...

AI Technical Summary

Problems solved by technology

When the clean liquid enters the inner cavity of the precision filter in the last stage of the device, because the liquid still contains a lot of floc floating matter, it will cause a large burden on the precision filter, making it filter and clog faster

Although the backwashing device is installed, it will still increase the number of maintenance, and the service life of the overall device will be reduced due to the small maintenance space and high maintenance cost

[0011] On the other hand, the mechanical size and weight of sewage treatment equipment of the same specification in the prior art are generally larger and heavier, such as the production of ILSEUNG COLTD in South Korea (used by 25 people), its external dimensions are length 1910, width 1590, height 1925, Volume is 5.84m 3

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