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Method of integratedly utilizing sludge pretreatment and cement kiln, and system thereof

A cement kiln and pretreatment technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve problems such as difficult to achieve safe and harmless treatment, and achieve reduction The effect of waste gas treatment volume, reduced infrastructure investment, and high replacement rate

Active Publication Date: 2011-09-21
华新环境工程有限公司
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  • Application Information

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Problems solved by technology

The problem with this method is that the sludge is fed into the kiln as raw material, and the volatile substances in the sludge are decomposed in the low-temperature section of the rotary kiln preheater, and then discharged with the exhaust gas, so it is difficult to meet the requirements of safe and harmless treatment.

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  • Method of integratedly utilizing sludge pretreatment and cement kiln, and system thereof
  • Method of integratedly utilizing sludge pretreatment and cement kiln, and system thereof

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Embodiment Construction

[0028] Such as figure 1 Shown, a kind of method for sludge pretreatment and comprehensive utilization of cement kiln, it comprises the following steps:

[0029] 1) After the sludge (primary sludge) is dehydrated by plate and frame filter press or / and dried by solar drying system (solar drying device) (or without plate and frame filter press, and without solar drying system ), crushed by the granulation system, premixed and granulated, and then enters the sludge dryer; the granulated system is composed of a crusher and a granulator (crushing first, then granulating);

[0030] 2), sludge drying: the first fan draws hot air from the heat source into the sludge dryer, and dries the sludge moisture to 0-30wt% (optimally 1-30wt%) to obtain dried sludge. mud; the dried sludge is sent to the storage device by the conveying device for storage; the heat source has one of the following two types: ① kiln head exhaust gas [rotary kiln (ie cement kiln) kiln head exhaust gas], ② kiln head e...

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Abstract

The invention relates to a method of integratedly utilizing sludge pretreatment and a cement kiln, and a system thereof. The method includes the following steps: 1. crushing, blending and granulating the sludge by a granular system and then putting the sludge into a sludge dryer; 2. drying the sludge: drying the sludge through hot-blast air guided from a heat source by a first fan till the sludge contains, by weight, 0-30% of water so as to obtain dried sludge; 3. treating exhaust gases; 4. utilizing the cement kiln: after the dried sludge in a storage device is transported by a transporter to a weigher and is measured by the weigher, burning the dried sludge to produce cement clinker, wherein the dried sludge is transported by the transporter to a kiln head burner, a decomposing furnace or a precombustion chamber of a cement kiln system. According to the invention, the sludge can be used safely, innocuously and efficiently. Therefore, the purpose of energy conservation can be achieved.

Description

technical field [0001] The invention relates to a method and system for comprehensive utilization of sludge pretreatment and cement kiln. Background technique [0002] After industrial wastewater (including printing and dyeing, papermaking, leather, chemical and various mechanical industries) and domestic sewage are treated, while the sewage is purified, it will produce about 1% of the total sewage entering the sewage treatment plant. Sludge, in addition to concentrated inorganic and organic pollutants, this type of sludge also contains a large number of pathogens and various heavy metal elements. Therefore, it is an important part of the sewage treatment system to safely and economically dispose of the sludge generated during the sewage treatment process. If the sludge is not properly treated, it will not only directly affect the normal operation of the sewage treatment system, but also Bring secondary pollution to the environment. [0003] At present, most of the sludge ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/12C04B7/24
CPCY02P40/10Y02W10/37
Inventor 李叶青王焕忠王加军胡贞武张江
Owner 华新环境工程有限公司