Multi-effect sludge drying equipment

Abstract

The invention relates to the technical field of sludge drying, and discloses multi-effect sludge drying equipment, which comprises a rack, a sludge feeding device is arranged at the upper right corner of the rack, a dewatering mechanism is arranged below the sludge feeding device and comprises a plurality of conveying rollers, the conveying rollers are arranged in a concave shape, a cathode metal chain is jointly sleeved outside the plurality of conveying rollers and is connected with the cathode metal chain in a matching manner, an anode roller is arranged on the cathode metal chain, the surface of the anode roller is propped against the cathode metal chain, sludge subjected to electroosmosis enters a conveying belt, steam is extracted out by gas hoods at the upper part and the lower part of the conveying belt, the condition that the steam does not spread to the surrounding is ensured, the BOD and COD in the separation liquid can be reduced, and secondary treatment is not needed; the used energy is convenient to use, and the direct-current power supply is electrified; the energy consumption is low, the treatment time is short, so that the equipment cost and the operation cost are low, and compared with a hot-dry method, the sludge calorific value is low, and the water content of the treated sludge is low.

Description

technical field [0001] The invention relates to the technical field of sludge drying, in particular to a multi-effect sludge drying equipment. Background technique [0002] In urban production and life, various wastes such as industrial waste and domestic waste are often produced, among which a large amount of sludge will be produced in the process of sewage treatment. With the development of domestic sewage treatment business, the total water treatment volume of sewage plants And the degree of treatment will continue to expand and improve, and the amount of sludge produced is also increasing. In addition to a large amount of organic matter and rich nitrogen, phosphorus and other nutrients, there are also heavy metals, pathogenic bacteria and parasites in sewage sludge. Toxic and harmful substances such as pollutants, so in order to prevent its pollution, it needs to be treated twice. [0003] As far as the sludge drying equipment currently on the market is concerned, most ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-effect sludge drying equipment to solve a large number of shortcomings in the two methods in the prior art. The heat drying is easy to produce stench and emit around the treatment site; the sludge soluble separation liquid contains organic matter concentration High, BOD and COD are high, requiring secondary treatment; energy consumption is high, treatment time is long, so equipment costs and operating costs are high; when using a sleeve heat exchanger for heat recovery, it is easy to scale on the tube wall, And the coking of organic matter on the pipe wall will cause corrosion and wear on the pipe wall and T-shaped elbow in the high temperature area of ​​the heat exchanger; compared with incineration, the calorific value of sludge is low, and there are large energy consumption, complex structure and difficult maintenance in cold drying other shortcomings

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