A high-efficiency sewage filter

Abstract

The invention discloses a high-efficiency dirt-absorbing filter. The high-efficiency dirt-absorbing filter mainly comprises a filter, a dirt-absorbing component and a power cylinder, wherein the filter is rigidly connected with a polished rod of the power cylinder; the dirt-absorbing component is arranged inside the shell of the filter; a movable dirt-absorbing plate of the dirt-absorbing component and a filtering core form a ring-shaped space; the movable dirt-absorbing plate is internally provided with respectively-independent dirt-absorbing channels according to the zones; the ring-shaped space is connected with the dirt-absorbing channels; under the action of pressure difference, fluid passes through the surface of the filtering core at a high speed to impact and remove the dirt on the surface of the filtering core so as to achieve the purpose of cleaning the filtering core at a ring-shaped channel; the dirt-absorbing component is rigidly connected with a connecting rod of the power cylinder; the rigid connecting rod of the power cylinder does reciprocating movement under the action of fluid pressure to push the dirt-absorbing plate to do reciprocating movement on the surface of the filtering core so as to achieve the purpose of cleaning the whole filtering core in the zone. The high-efficiency dirt-absorbing filter disclosed by the invention has the advantages that the structure is simple and reliable, the operation is simple, the installation range is wide, the occupation is saved, the use cost is low, the safe and reliable effects and the dirt-removing effect are achieved, online dirt removal of single filter can be realized, the dirt removing efficiency is high and the dirt-liquid amount is less.

Description

technical field [0001] The invention relates to the field of filters, in particular to a high-efficiency dirt suction filter. Background technique [0002] When the N-1 filter is working, the fluid passes through the filtering effect of the surface of the filter element, and the impurities greater than its filtration precision are intercepted outside, and the remaining fluid, that is, the filtered liquid, enters the next process through the filter screen. After the filter is used for a period of time, A layer of impurities builds up on the surface of the filter element, and the differential pressure between the front and rear sides of the filter element increases, triggering filter backwash. The traditional method is: put one filter in the backwashing state, and the remaining N-1 filters continue to filter. Gas-assisted backwashing: introduce external high-pressure gas, reverse the flow of the fluid inside the filter to be backwashed, and quickly empty it to remove the filt...

AI Technical Summary

Problems solved by technology

Therefore, this requires the use of large flow fluids, resulting in a relatively large amount of backwashing liquid

Since the fluid contains colloidal or bituminous substances, they will adhere to the surface of the filter element, resulting in poor backwashing effect. According to the requirements of the process, a clean fluid that can dissolve these viscous substances will be introduced to soak for a period of time, and then backwash again , this part of the clean fluid is treated as waste oil and re-refined, resulting in increased energy consumption and cost

At the same time, even if a large flow passes through the surface of the filter element that needs to be backwashed in reverse under pressure, due to the large surface area of ​​the entire filter element, the flow rate distributed on the surface of a large number of filter elements that needs to be backwashed will be slower. According to Bernoulli It can be seen from the equation that the pressure lost on the surface of the filter element is relatively low, resulting in unclean recoil of the filter element, that is, incomplete regeneration. After a long time, the filter element needs to be cleaned outside the device, that is, it must be removed from the container first, and then use physical and chemical washing

In this way, when the filter element is cleaned, not only the amount of dirty liquid is large, but also energy consumption and cost are increased.

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