Complete steam low-temperature thermally hardening, tempering and drying device and method for sludge

Abstract

The invention discloses a complete steam low-temperature thermally hardening, tempering and drying device for sludge and a method for treating sludge and belongs to the field of solid wastes. The system comprises a sludge storing and conveying system, a low-temperature thermally hardening and tempering device, a plate frame filter-pressing and dewatering system, a pelletizing and air-drying system, a waste gas treating system, a deodorizing system, a waste water treating system and a steam supply system, wherein the sludge storing and conveying system is used for ensuring the temperature safety, environment-friendly storage and transportation of the sludge; the low-temperature thermally hardening and tempering device is used for damaging the outer wall structures of solid-phase substances such as cells and the like in the sludge and improving the dewatering performance of the sludge; the plate frame filter-pressing and dewatering system is used for dewatering the thermally hardened and tempered sludge; the pelletizing and air-drying system is used for pelletizing and naturally drying dewatered sludge; the waste gas treating system is used for collecting waste steam produced by the low-temperature thermally hardening and tempering device; the deodorizing system is used for treating odor produced by the system; the waste water treating system is used for treating drained liquid produced by plate frame filter-pressing treatment; and the steam supply system is used for supplying saturated steam to the low-temperature thermally hardening and tempering device. Therefore, the aims of drying the sludge, reducing energy consumption, lowering cost and providing favorable conditions for subsequent resource recycling of the sludge are fulfilled.

Description

technical field [0001] The invention relates to a complete treatment device and method for steam low-temperature thermal conditioning and drying of sludge, belonging to the field of solid waste. The invention relates to a complete treatment device for steam low-temperature thermal conditioning and drying of sludge, which belongs to the field of solid waste treatment. In particular, it relates to a complete set of drying treatment equipment for reducing, harmless and stabilizing the sludge produced in urban sewage treatment. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the construction of sewage treatment plants has increased, and the output of sludge has also increased rapidly; it will increase sharply from 12.2 million tons in 2004 to 27.4 million tons in 2010. Most urban sewage treatment plants have a serious situation of "heavy water and light mud" from the time of planning and design, and less than...

AI Technical Summary

Problems solved by technology

Sludge drying mainly adopts the traditional thermal drying method, which has the advantages of mature equipment and stable drying effect; however, due to the high water content in the sludge and its low calorific value, a large amount of heat energy will be consumed in the drying process. Therefore, the operating cost is higher

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