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Filter element cleaning method

A cleaning treatment and filter element technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle filtration, etc., can solve the problems of rapid increase in dust concentration, poor effect, and difficult implementation

Active Publication Date: 2015-06-03
CHENGDU INTERMENT TECH
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Problems solved by technology

The above-mentioned methods may not be ideal for cleaning the filter element, or the technology is complex and difficult to implement
Especially for the filter element used to filter the dusty gas with low loose ratio ash, because the dust is not easy to settle when filtering, the dust concentration in the filter increases rapidly, and the dust is easy to accumulate between the filter element and the filter element to form "ash bridging". The clogging is serious, and the general filter element cleaning method is not effective

Method used

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Examples

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Embodiment 1

[0045] This embodiment specifically relates to a filter technology for coal low-temperature carbonization furnace gas. After the furnace gas overflows from the retort furnace, the preliminary solid-gas separation is carried out through a gravity dust collector or a cyclone dust collector, and then directly enters the Figures 1 to 3 The filter system shown performs filter dust removal and purification. Under normal working conditions, the filter system switches periodically between "filter - blowback". Every 15 minutes of running in the normal working state, the rigid particle flow injection device 130 is started, and the rigid particle flow formed by the quartz sand particles with a diameter of 0.8 to 2.5 mm is driven by the nitrogen gas with a pressure of about 0.6 Mpa as the carrier air flow to the entire filter assembly. For spraying treatment, start the mechanical mixing device 140 after spraying to mix the used quartz sand particles with the dust in the ash bin 160, and...

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Abstract

The invention discloses a filter element cleaning method which can be used for effectively removing attached objects on a filter element. The method is used for spraying rigid particles to attached objects on the filter element so that the link of impacting and cleaning the attached objects is carried out by a rigid particle flow. According to the method, a technical means of impacting and cleaning the attached objects on the filter element by using the rigid particle flow has dual advantages of a gas impacting manner and a direct physical contact damaging manner by a scraping mechanism, so that the attached objects on the filter element can be effectively removed and the ideal filter element cleaning effect is realized.

Description

technical field [0001] The invention relates to a filter core cleaning treatment method, a filter and a filter system, and a method for restoring filter core permeability. Among them, the permeability of the filter element is also called the permeability of the filter element. The higher the permeability of the filter element, the greater the filtration flux under the same filtration pressure difference. Background technique [0002] When performing gas-solid separation filtration or liquid-solid separation filtration, a layer of filter cake will gradually adhere to the filter element of the filter. After the filter cake accumulates to a certain extent, the passability of the filter element will be significantly reduced. At this time, the filter element needs to be cleaned. To remove the above-mentioned attachments from the filter element, so as to restore the passability of the filter element and prolong the service life of the filter element. Take gas-solid separation and...

Claims

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Application Information

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IPC IPC(8): B01D46/00
Inventor 高麟汪涛莫代林
Owner CHENGDU INTERMENT TECH
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