Sludge storing pipe bag for dehydration and dehydration method

Abstract

The invention provides a sludge storing pipe bag for dehydration and a dehydration method. The sludge storing pipe bag comprises a body (1) and is characterized in that an anode (2) and a cathode (3) connected with a power supply are installed inside the body (1). The invention effectively improves dehydration efficiency of the sludge storing pipe bag, and the dehydration and consolidation are carried out on the site and are clean and efficient, thereby greatly shortening time for dehydration and consolidation; water filtered and discharged from the wall of the pipe bag substantially meets the standards, which avoids the secondary pollution caused by harmful elements seeping into the ground during dehydration in a settling tank; and consolidated sludge can be conveniently applied to various works with soil. The invention has obvious economic benefit and social ecological benefit.

Description

technical field [0001] The invention relates to a silt storage pipe bag for on-site environmental protection and high-efficiency dewatering of silt produced by sludge dredging projects in urban rivers and lakes, belonging to the technical field of on-site sludge dewatering technology; the invention also relates to using the silt storage pipe bag for dewatering Methods. Background technique [0002] According to the statistics of relevant departments, the amount of silt produced by the dredging and dredging projects of urban rivers and lakes in my country is as high as 70 million tons each year. How to deal with these silts quickly and effectively has become an urgent problem. ZL200510095750.2 discloses an in-situ dewatering method of sludge in urban waters, and this patent is a technology for dewatering sludge into a pipe bag. The tube bag sludge dewatering technology is a relatively environmentally friendly and efficient treatment method. However, due to the special struct...

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Problems solved by technology

This process is complicated. In order to make the flocculant diffuse evenly in the sludge, the excavated sludge (solid content is about 80%) must be diluted with water until the solid content is only about 17%, and then filled into the pipe bag and Add flocculant, after the sludge particles are grouped and dehydrated, their volume will be greatly reduced, and then the tube bag will be filled and dehydrated again. The above steps need to be repeated until the end

This process has the following defects: First, the solid content of the silt excavated from rivers and lakes is about 80%. In order to achieve the purpose of dehydration and consolidation of the silt, it needs to be diluted to about 17% in the process before dehydration and consolidation. Its process flow runs counter to the process goal; 2. It needs to be diluted, filled, and consolidated many times, and its process flow is cumbersome and takes a long time; 3. The method of dehydrating and consolidating the silt through chemical substances changes the original state of the soil. The chemical properties of the soil will produce new chemical substances, which will easily cause secondary pollution in the reuse of soil. The chemical substances contained in the discharged water may cause new pollution to the environment. At the same time, the large-scale production of chemical additives in factories is also prone to pollution. Surroundings

If a tube bag with a single-layer flat wire structure is used to fill the mud, the single-layer flat wire cannot form an effective reverse filter layer with the soil particles, which will easily cause the soil particles to block the pores of the bag wall and lose the drainage function, or the soil particles will pass through the pores of the bag wall. Flow out of the tube bag and lose the function of soil holding

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