Unpowered screen type solid-liquid separator and control method thereof

Abstract

The invention discloses an unpowered screen type solid-liquid separator and a control method thereof. The unpowered screen type solid-liquid separator comprises a sealed separator body, a water inletpipe, a water outlet pipe and an air inlet pipe; the sealed separator main body comprises a filter cover and a separator shell cover which are fixed on the bottom plate; a filtering cavity is definedby the filtering cover, the separator shell cover and the bottom plate, and a cleaning cavity is defined by the filtering cover and the bottom plate; the air inlet pipe extends into the filtering cavity through the bottom plate, a one-way water inlet valve is arranged on the filtering cavity, and the water outlet pipe is connected with the bottom plate, communicated with the cleaning cavity and provided with a one-way water outlet valve. In the sewage filtering process, sewage flows downwards along the filtering cover to generate impact, intercepted impurities on the filtering cover are drivento roll downwards, gather into clusters and accumulate at the bottom of the filtering cavity, the problem that a conventional filtering net can be blocked quickly is solved, the filtering cover is not prone to being blocked by dirt and sludge, and the service life is prolonged. In the invention, water in the cleaning cavity flows out due to the water outlet pipe in the high-pressure state of theinner cavity of the sealed separator and the height difference between the inner cavity and the water outlet end of the water outlet pipe, so that a water outlet pump is avoided.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a non-powered sieve type solid-liquid separator and a control method thereof. Background technique [0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for drainage or reuse. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc. field, and more and more into the daily life of ordinary people. [0003] For miniaturized solid-liquid separation, because the time period and discharge volume of sewage discharge are very regular, during sewage treatment, fast sewage treatment is often carried out at a certain period of time, that is, when sewage is filtered, water pumps are used for inlet and outlet. Water outlet suction speeds up the treatment, but because during the water outlet suction process, under the ...

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Problems solved by technology

[0003] For miniaturized solid-liquid separation, because the time period and discharge volume of sewage discharge are very regular, during sewage treatment, fast sewage treatment is often carried out at a certain period of time, that is, when sewage is filtered, water pumps are used for inlet and outlet. Water outlet suction speeds up the treatment, but because during the water outlet suction process, under the action of the water outlet pump, when the sewage is filtered, the water on both sides of the filter screen continuously passes through the filter screen under the action of water pressure, resulting in a large number of large particles Stains clog the filter, small particles continue to build up on larger particles over treatment time

And because the sewage treatment is divided into time periods, the sewage treatment equipment has a period of time when the sewage is not treated. During this time period, the small particles of dirt accumulated on the large particles stick and harden, making the large particles bigger and bigger, and quickly clogged and destroyed. Filter

This leads to short service life and high cost of sewage treatment, resulting in smaller and fewer filter holes, smaller and smaller treated water, and even dry pumping of the outlet pump and burning of the motor.

[0004] Furthermore, most of the solid-liquid separators in the prior art adopt an open design method, and for the sewage treated centrally, toxic and harmful gases are often discharged, which affects the outside world

Secondly, in the process of sewage treatment, it is often necessary to add appropriate reaction reagents, and the conditions of reagent reaction need to be under anaerobic conditions, the safety and economicalness of the use of solid-liquid separators with open designs need to be considered

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