Device and method for improving dewatering efficiency of activated sludge by using biomass ash

A technology of biomass ash and activated sludge, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. It can solve the problems of difficult removal and achieve low operating cost and large treatment capacity , cost reduction effect

Pending Publication Date: 2018-11-06
安徽国祯生态科技有限公司
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Problems solved by technology

[0003] The activated sludge of urban domestic sewage treatment plants is firstly added with polyacrylamide to flocculate the small molecular sludge into macromolecular sludge, and the free water in the sludge is removed by gravity. After a large amount of sewage is removed, the sludge After the fluidity is reduced, it creates conditions for the sludge to enter the pressure dehydration, but at this time the water in the sludge exists as bound water, which is very difficult to remove, and the dryness only reaches 15%. If you want to further reduce the water content, Requires heat to resolve

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  • Device and method for improving dewatering efficiency of activated sludge by using biomass ash

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Embodiment Construction

[0027] Such as figure 1 As shown, a device that uses biomass ash to improve the dehydration efficiency of activated sludge includes a sludge pipeline 1, a flocculant input pipe 2, a sludge dynamic mixer 3, a sludge distribution box 4, a mud distributor 5, two Sludge vacuum dewatering box 6, two wipers 7, biomass ash distribution box 8, double-screw belt distributor 9, three sludge agitators 10, porous pressure roller dehydration device 11, turning back roller 12 of the net part, net Drive roller 13, 2 to 5 first filter screen guide rolls 14, first filter screen 15, two water receiving trays 16, first mud scraper 17 and high-pressure dehydration device, said high-pressure dehydration device includes a second filter screen Net 18, active press steel roller 19, two passive press rubber rollers 20, sludge conveyor belt 21, second filter screen guide roll 22, third filter screen 23, three third filter screen guide rolls 24 and the second scraper The mud plate 25; the flocculant in...

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Abstract

The invention provides a device for improving the dewatering efficiency of activated sludge by using biomass ash. The device includes a sludge pipeline, a flocculant inlet pipe, a sludge dynamic mixer, a mud distributor, two scraper blades, a biomass ash distribution box, a double screw belt distributor, three sludge agitators, a porous pressure roller dewatering device, a net head return roller,a net portion active roller, a first filter screen, a water receiving tray, a first scraping plate and a high pressure dewatering device. According to the device, by adding the biomass ash, the biomass ash is mixed with the sludge, so that combined water in the sludge becomes free water, the difficulty of sludge dewatering is reduced, the sludge dryness can be increased to 35-40%, the cost of sludge transportation is reduced, and the by-product biomass ash produced by a biomass power plant is comprehensively utilized. The invention also provides a method for improving the dewatering efficiencyof the activated sludge by using the biomass ash.

Description

technical field [0001] The invention relates to the technical field of muddy water treatment, in particular to a device and method for improving the dewatering efficiency of activated sludge by using biomass ash. Background technique [0002] The conventional dehydration process of excess activated sludge in urban domestic sewage treatment plants is "excess sludge - sedimentation tank - adding flocculant (polyacrylamide) before dehydration - water content above 99%, polyacrylamide has a high molecular weight , Different ion degrees, fixed and adsorbed unstable particles on the molecular chain, so under the action of the flocculant, the sludge particles in the water gradually increase, forming trap flocs, the formation of flocs will lead to the separation of mud and water, Easy to remove moisture from mud. [0003] The activated sludge of urban domestic sewage treatment plants is firstly added with polyacrylamide to flocculate the small molecular sludge into macromolecular s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14
CPCC02F11/122C02F11/14
Inventor 李华徐建东刘影张灿
Owner 安徽国祯生态科技有限公司
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