Method and device of treating urban mud by using cement rotary kiln

A technology for cement rotary kiln and municipal sludge, which is applied in the oxidation treatment of sludge, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of reduced mechanical rigidity of conveyor, low thermal reaction effect of reaction cylinder, and inability to form continuous work. , to avoid the loss of heat, increase the stirring effect and overall strength, and improve the reaction speed and effect.
CN1861532AInactive Publication Date: 2006-11-15北控东方(北京)环保技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北控东方(北京)环保技术有限公司
Publication Date
2006-11-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for treating city sludge by the rotary kiln of preparing cement features that said sludge containing calcium hydroxide is calcined in said rotary kiln to become calcium oxide. Its apparatus is composed of a sludge pre-treating unit and new material synthesizing unit. The spiral blades of the screw stirring-delivering mechanism have the concave-convex structure on their edge, resulting in high stirring effect and strength.
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Description

technical field

[0001] The invention relates to a method for treating excess sludge produced after urban sewage treatment and a device used in the method. Background technique

[0002] The sludge produced by the urban sewage plant is the residue left after the sewage treatment plant collects and treats the urban sewage and discharges the reclaimed water up to the standard. It is a concentrated substance that exudes a foul smell, contains a variety of volatile gases, contains a variety of pathogenic bacteria and viruses, and is accompanied by various substances from industrial waste, household chemicals, pesticides, heavy metal ions, and toxic chemicals. thing.

[0003] The prior art for treating the above-mentioned municipal sludge uses a two-component exothermic agent added to the sludge to evaporate and solidify its liquid components. The heat generating agent uses dehydrated aluminum strong salt and non-aluminum strong salt as acidic components, including 40-120 parts b...

Claims

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