Drying and incineration system, and drying and incineration method for sludge

A sludge drying and sludge technology, applied in the field of treatment and sludge drying, can solve the problems of excessive exhaust gas, high energy consumption, and high potential safety hazards, and achieve the effects of fast drying rate, reduced demand and strong adaptability

Inactive Publication Date: 2020-06-16
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: Aiming at the problems of large energy consumption, high exhaust gas, and large safety hazards in the existing sludge drying and incineration treatment process, the present invention provides a sludge drying and incineration system and a method for sludg

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  • Drying and incineration system, and drying and incineration method for sludge
  • Drying and incineration system, and drying and incineration method for sludge
  • Drying and incineration system, and drying and incineration method for sludge

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Embodiment

[0048] Taking the sludge from a certain sewage plant around Jiangsu Province (13.1MJ / kg on a dry basis) as an example, 350t / d of wet sludge with a water content of 80% is treated, and the sludge drying and incineration system of the present invention is used for processing (mode 3, 4), and compared with the traditional sludge drying and incineration treatment method (mode 1, 2), and then compared the use of different calorific value sludge and the addition of different auxiliary fuels, the results are shown in Table 1 below; in Table 1, The auxiliary fuel is bituminous coal or rice husk, among which, the calorific value of bituminous coal is 24MJ / kg, and the calorific value of rice husk is 13.5MJ / kg.

[0049] Table 1 Treatment effect of sludge drying and incineration system in different ways

[0050]

[0051]

[0052]It can be seen that the sludge drying and incineration system of the present invention does not require sewage treatment and tail gas deodorization, saving ...

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Abstract

The invention discloses a drying and incineration system, and a drying and incineration method for sludge. The system comprises a dryer used for drying wet sludge, a fluidized bed incinerator used forcarrying out incineration treatment on the dried sludge and exhaust gas of the dryer, a waste heat boiler used for recovering and utilizing high-temperature smoke waste heat generated due to incineration, an air pre-heater used for re-recovering the smoke waste heat and providing hot air combustion-supporting wind for the incinerator, and a tail gas treatment device used for purifying smoke subjected to waste heat utilization and then discharging the smoke, wherein one path of a high-temperature smoke outlet of the incinerator communicates with the dryer, and carries out contact drying on thewet sludge, the other path is connected with a flue of the waste heat boiler, and an exhaust port of the dryer communicates with the incinerator. A part of the high-temperature smoke is circulated inthe dryer and the incinerator, odor of the sludge is brought into the incinerator and directly treated while the sludge is dried by virtue of hot smoke energy, and the system does not need to carry out tail gas deodorization, so that the tail gas dehumidification and deodorization costs are saved; and the whole system realizes adequate energy utilization, and is safe and capable of running for along time.

Description

technical field [0001] The invention relates to a sludge drying and incineration system and a drying and incineration method, belonging to the field of sludge drying and treatment. Background technique [0002] As my country's urbanization process continues to accelerate, the amount and rate of urban sewage treatment continue to increase, and the output of urban sludge, which is the main by-product of sewage treatment, also increases rapidly. Due to the late start of municipal sludge disposal in my country and relatively backward key technical equipment, a large amount of municipal sludge has not been properly disposed of. The incineration method has a significant reduction effect, saves land, can also eliminate various pathogens, and convert toxic and harmful substances into harmless substances. The sludge has a high moisture content and needs to be dried before it can be sent to the incinerator for incineration. The drying process absorbs heat while incineration releases ...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23G5/04F23G5/46F23G5/30F26B11/10F26B23/02C02F11/13
CPCC02F11/13F23G5/04F23G5/30F23G5/46F23G7/00F23G2209/141F26B11/10F26B23/02F26B2200/18Y02P70/10
Inventor 黄亚继胡华军樊聪慧戚二兵丁守一罗健威
Owner SOUTHEAST UNIV
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