River sludge treatment method and device

Abstract

The invention provides a river sludge treatment method which comprises the following steps: digging sludge from the bottom of a river, and collecting the sludge in a sludge storage pool; conveying thesludge into a feeding hopper above a reaction tank, enabling the sludge to slowly flow into the reaction tank via the feeding hopper, impacting the sludge by water ejected from a high-pressure jet apparatus below the feeding hopper in the reaction tank, crushing the sludge by high-pressure water, enabling the sludge to impact on inner walls of the reaction tank, enabling the sludge to flow into the bottom of the reaction tank along the inner walls of the reaction tank, standing, layering, and discharging the upper layer into a circulating water tank; and discharging the lower sludge onto a filter plate of a mechanical dewatering plant, and dehydrating the sludge under the effects of vacuum and a compression device so as to be dried. The treatment process is simple and reliable, the equipment is easy and convenient to manufacture, the operation is simple, secondary pollution is avoided, the energy consumption is low, low-cost cleaning can be performed to remove moisture in the sludge,and aims of river sludge reduction and harmlessness can be achieved.

Description

Technical field: [0001] The invention relates to the field of environmental engineering, in particular to a method and device for treating river sludge. technical background: [0002] River siltation has increasingly affected the normal performance of various functions such as flood control, drainage, irrigation, water supply, and navigation. In order to restore the normal functions of the river and promote rapid and sustainable economic and social development, river dredging projects are carried out. The river channel will become deeper and wider through treatment, and the river water will become clearer. The production conditions and living environment of the people will be significantly improved, and the goal of "clear water, smooth river, green banks and beautiful scenery" will be achieved. Most of the small and medium-sized rivers in our country have serious pollution problems, and the water conservancy construction departments in various places have begun to carry out ...

AI Technical Summary

Problems solved by technology

Landfill technology has low treatment cost, but it occupies a large area, and the landfill gas and leachate are large and difficult to deal with

The incineration technology has a significant capacity reduction effect, and the calorific value of the sludge can be utilized, but the operating cost is high, and there is a problem of secondary air pollution

Anaerobic digestion technology can recover energy substances, but operation and management are difficult, and there are not many successful cases

The effect of traditional mechanical dehydration is not ideal, and the deep dehydration requirements of sludge cannot be realized. The development of methods and equipment for municipal sludge treatment is an important topic in the field of environmental governance.

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