Micron or nano grade filter pressing device of dehydration slagging non-pressure vessel

Abstract

The invention relates to a micron or nano grade filter pressing device of a dehydration slagging non-pressure vessel, which is formed by connecting a press filter provided with a micron or nano grade filter pressing filter element, a safe backflushing gas tank provided with a thin calandria tube, a backflushing water tank and a squeezing device by a pipeline. In a system, all the devices are non-pressure vessel devices, so that the potential safety hazard existing in the operation of equipment can be avoided, and the annual inspection work of a pressure vessel can be omitted. The filter pressing accuracy of filtrate, the backflushing flow velocity of the filter element and the energy are high, the regeneration effect is good, and the service life is long. As the squeezing device is arranged, the recovery rate of the filtrate is high, the water content of a filter cake is low, the discharged material can be simply and conveniently recovered, and solid-liquid double recovery and zero emission can be realized. Furthermore, the automation degree is high, and the whole set of the device can be unmanned and automatically run.

Description

technical field [0001] The invention relates to an industrial pressure filter device, in particular to a non-pressure vessel micron or nanoscale filter pressure device. Background technique [0002] At present, micron or nanometer filter press devices are widely used, but there are many problems in the existing filter press devices: Since the filter residue on the filter element needs to be removed during the filter press process, the usual method of removing residue is to use compressed air for backwashing, using pressure Generally between 0.5 ~ 1.0Mpa. The classification of pressure vessels in my country is mainly based on the "Pressure Vessel Safety Technical Supervision Regulations", and its pressure vessels must meet the following three conditions at the same time: the maximum working pressure p w ≥0.1MPa (excluding hydrostatic pressure); inner diameter (non-circular section refers to its largest dimension) Di≥0.15m, and volume V≥0.025m 3 ;The medium contained is gas ...

AI Technical Summary

Problems solved by technology

[0002] At present, micron or nanometer filter press devices are widely used, but there are many problems in the existing filter press devices: Since the filter residue on the filter element needs to be removed during the filter press process, the usual method of removing residue is to use compressed air for backwashing, using pressure Generally between 0.5 ~ 1.0Mpa

Most of the filter press, backwash and filter residue discharge devices used in the existing filter press devices are pressure vessels, so there are potential safety hazards in the process of use, and annual inspections of the pressure vessels must be carried out on the equipment every year; Pressure vessels are not allowed; sometimes compressed air must be used for irregular purging before and after backwashing, which consumes a lot of energy and poses safety hazards; the compressed air is not evenly purged, the purging environment is poor, and the slag is easily scattered irregularly. Cause secondary pollution to the environment, and the water content of the filter cake is as high as 50% or more; if the waste liquid and waste residue produced after backwashing are discharged, the pollution will be serious, and if the harmless treatment is carried out, the cost will be very expensive and sometimes expensive solutions and Metals cannot be recycled, causing economic loss

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