Sludge filter-pressing method of membrane filter press
A membrane filter press and sludge technology, applied in dehydration/drying/concentrated sludge treatment, etc., can solve the problems of reduced calorific value of sludge, failure to achieve the purpose of sludge reduction, etc.
Active Publication Date: 2014-09-10
SOUND ENVIRONMENTAL RESOURCES
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Problems solved by technology
The high-pressure diaphragm box-type filter press can reduce the moisture content of sludge from 80-90% to below 60% of the landfill standard, but a large amount of quicklime and iron salt must be added, and the additives account for more than 20% of the sludge dry basis.
Therefore, the purpose of sludge reduction is not achieved, and the calorific value of sludge is further reduced
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[0028] For ease of understanding, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0029] figure 1 As shown, the dehydration device includes: 1-rectifier power supply, 2-anode cable, 3-cathode cable, 4 mud storage tank, 5, 6, 7-one-way valve, 8-frame, 9-cathode conductive filter, 10-anode copper bar, 11-cathode copper bar, 12-mud cake, 13-diaphragm filter plate, 14-anode plate, 15-filter cloth, 16-hydraulic station, 17-material conveyor, 18-press water pipe, 19 - squeeze pump, 20 - air compressor, 21 - sludge screw pump, 22 - sludge channel; 23 - handle, 24 - squeeze water channel, 25 - diaphragm cavity, 26, 26 - drainage channel, 27 - diaphragm plate, 28-solid plate, 29-cathode electric nose.
[0030] figure 1 1. Structural schematic diagram of electro-osmotic membrane filter press, anode cables 2 and 3 are respectively connected to rectifier power supply 1, and anode cables 2 and 3 are respecti...
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The invention provides a sludge filter-pressing method of a membrane filter press. The sludge filter-pressing method comprises the following steps: enabling the sludge to enter a sludge storage cavity; enabling high pressure water to enter a membrane cavity to filter-press the sludge in the sludge storage cavity; re-blowing the sludge into the sludge storage cavity and carrying out second filter-pressing on the sludge in the sludge storage cavity; emptying the pressing water inside the membrane cavity; re-blowing high pressure air into the sludge storage cavity; opening filter plates to enable sludge cakes to automatically fall on a material conveyor, wherein the sludge storage cavity is formed by two parallel membrane filter plates and a compartment type filter plate 3; the relatively sealed membrane cavity is formed by two membrane plates; an electro-osmotic filter-pressing step is carried out while carrying out the second filter-pressing step in the membrane cavity. A sludge electro-osmotic dewatering device has a simple structure, operates reliably, can achieve reduction of the moisture content of the sludge below 50%, and improves the dewatering efficiency by 2-3 times compared with the membrane filter press.
Description
technical field [0001] The invention relates to the field of sludge disposal equipment components, in particular to a high-pressure diaphragm filter method for electroosmotic sludge. Background technique [0002] Domestic sludge contains a large amount of water, organic and inorganic pollutants, which will cause new pollution without treatment. Especially in areas with a high level of urbanization, the problem of sludge disposal has become very prominent. Among the existing sludge treatment technologies, sludge drying technology is currently the most urgent problem to be solved. [0003] "Standards for Pollution Control of Domestic Waste Landfill Sites" GB / T23480-2009 clearly stipulates that the treated sludge from domestic sewage treatment plants with a moisture content of less than 60% can enter the domestic waste landfill for landfill disposal. [0004] At present, in order to meet the requirements of sludge subsequent treatment and disposal technologies (such as sanita...
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Inventor 孟龙才建成陈桦曹儒耀孙力
Owner SOUND ENVIRONMENTAL RESOURCES