Sludge treatment system

Abstract

The invention relates to a sludge treatment system. The sludge treatment system comprises an adjusting tank, a centrifugal dehydrator, a sludge groove, a flocculant feeding device and the like. The sludge treatment system has the advantages that the adjusting tank is used for selecting and collecting high-concentration hot-rolling or continuous-casting turbid circulating wastewater, so that the efficiency of the sludge treatment system is improved, and the sludge treatment scale is reduced; the centrifugal dehydrator is small in size, high in pre-dehydration efficiency and low in equipment operation requirement; the sludge groove is used as a turbid circulating water treatment slag pit and is also used as a sludge dehydration facility for collecting oxidized steel and hot-rolling or continuous-casting sludge; the flocculant feeding device only needs to feed a flocculant into the adjusting tank; the sludge treatment system is simple in process, less facilities and less equipment are needed, continuous operation is realized, and the investment cost is low; a large amount of chemical agents do not need to be added in sludge treatment, lime does not need to be added, the amount of generated dry sludge is small, the operation is convenient, and the personnel management cost is low; and the system adopts the three-dimensional arrangement, the occupied area of a water station is optimized to the maximum degree, the general layout is very convenient, every single space can be made use of, and the sludge treatment system is suitable for a new project and is also suitable for technical innovation.

Description

technical field [0001] The invention relates to the field of hot rolling or continuous casting equipment for metal casting, in particular to a sludge treatment system. Background technique [0002] Hot rolling turbid ring water in iron and steel enterprises is mainly produced in the process of various roll cooling, conveying roller table cooling, high-pressure descaling (washing scale and slag), and continuous casting turbid ring water is mainly produced in secondary spray cooling and equipment Water for direct cooling, flame cutting machine and billet slag granulation, rapid water cooling device and flame cleaning machine, etc. During the generation of turbid ring water, not only the water temperature will rise, but the water quality will also be polluted. The main pollutants in the turbid ring water are suspended iron oxide scale solid phase particles and various oil stains. [0003] At present, the commonly used water treatment processes for hot rolling or continuous cas...

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Problems solved by technology

[0005] The above-mentioned sludge treatment method has complicated system flow, many facilities, many equipments, a large area, and needs to add a large amount of chemical agents. The operation is difficult and the cost of personnel management is also high.

Hot rolling or continuous casting sludge often contains oil. It is difficult to dehydrate the plate and frame filter press, and the filter cloth is easy to be fouled. Therefore, a large amount of lime needs to be added, resulting in a substantial increase in the amount of dry sludge. Can only run intermittently

The use of belt filter press also requires a large amount of lime, and the dehydration rate is low and the amount of mud cake is large

In addition, in the past, many iron and steel enterprises did not have sludge treatment

With the increasing requirements for product upgrading and environmental protection, iron and steel enterprises have begun to build a large number of sludge treatment systems. However, in the past, the layout of water treatment made it difficult to build large-scale sludge treatment systems nearby.

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