Visual device of filter and precise filter

Abstract

The invention provides a visual device of a filter and a precise filter. The visual device of the filter comprises a mounting bracket, a light source projection lens, a fixed objective lens and an LEDlight source, wherein the light source projection lens and the fixed objective lens are fixed on the mounting bracket; the LED light source is erected on the mounting rack; and rays of the LED lightsource penetrate through the light source projection lens. The visual device can immediately find color, state and quantity of pollutants on a filter element of the filter and immediately find state and quantity of impurities in a filter bag to quickly respond to replace the element of the precise filter, so as to play a role of protecting follow-up equipment truly.

Description

technical field [0001] The invention relates to water treatment equipment, in particular to a filter visual device and a precision filter. Background technique [0002] The traditional precision filter is a stainless steel or carbon steel closed device, and a filter element or a filter bag is installed in the airtight housing as a filter element. During the use of the filter, pollutants are continuously accumulated on the filter element or filter bag, and the filtration resistance continues to increase. By observing the change of the water pressure difference between the inlet and outlet of the precision filter, the pollution status of the filter element can be reflected, and it can be judged whether the filter element should be replaced. [0003] Since the replacement of the filter element is only judged by the change of pressure, and the range of pressure change is small, and the change of pressure difference is not sensitive, the following problems are prone to occur duri...

AI Technical Summary

Problems solved by technology

[0004] (1) When the pollutants accumulate to a certain thickness, the filtration resistance suddenly increases, and even the filter element or filter bag is crushed or broken down. This process lasts for a short time. If the filter element of the precision filter is not crushed or broken down in time It is found that the follow-up protected equipment of the precision filter will be polluted soon

[0005] (2) When the filter element is broken down or flattened, the water pressure difference between the inlet and outlet of the precision filter will no longer change, which is easy to mislead the operator and create the illusion that the filter element does not need to be replaced temporarily, but in fact the pollutants have been transferred to the protected equipment, causing the pressure difference of the protected subsequent equipment to rise or even forced to stop running

[0006] (3) Due to the small pressure range of the inlet and outlet water pressure gauges of the precision filter, the pressure difference change range is not sensitive, and only observing the pressure difference is prone to distortion, and it is easy to delay the best time to replace the filter element

[0007] (4) The pollution of the precision filter can only be reflected from the pressure difference, which cannot reflect the real cause of pollution and the state of the pollutant in time, which is not conducive to taking targeted improvement measures for the pretreatment before the precision filter

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