Environmental protection treatment method of heavy metal sludge in sewage treatment plant

A technology for heavy metal sludge and sewage treatment plants, applied in the field of heavy metal pollutant treatment, can solve problems such as heavy metal sludge pollution, and achieve the effect of rational distribution and green application

Active Publication Date: 2019-01-01
河南景耀热电环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an environmentally friendly treatment method for heavy metal sludge in sewage treatment plants, aiming to quickly solve the pollution caused by heavy metal sludge to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An environmentally friendly treatment method for sludge containing heavy metals in a sewage treatment plant, comprising the following steps:

[0026] The weighed raw coal and the dried heavy metal-containing sludge are sent to the raw coal bunker for mixing through the conveyor belt. The mass ratio of the dried heavy metal-containing sludge to raw coal is 1:8, and then the pulverizing system performs coarse crushing and crushing successively. The ball mill is crushed until the material fineness is R90=16-20% and sent to the coal powder bin. The powder feeder adjusts the speed according to the load of the heating boiler, and sends the crushed mixed material into the cyclone furnace to burn to a molten state at 1600 ° C. , and the resulting molten material is contacted with water at 20°C in the granulation box for quenching to form a non-toxic glass body, and then the slag flushing pump sprays the pressurized water, and the granulation box The vitreous matter rushes to th...

Embodiment 2

[0030] An environmentally friendly treatment method for sludge containing heavy metals in a sewage treatment plant, comprising the following steps:

[0031] The weighed raw coal and the dried heavy metal-containing sludge are sent to the raw coal bunker for mixing through the conveyor belt. The mass ratio of the dried heavy metal-containing sludge to raw coal is 1:9, and then the pulverizing system performs coarse crushing and crushing successively. Ball milling until the fineness of the material is R90=16-20% and transported to the coal powder bin, the powder feeder adjusts the speed according to the load of the heating boiler, and sends the crushed mixed material into the cyclone furnace to burn to a molten state at 1800°C , and the resulting molten material is contacted with water at 25°C in the granulation box for quenching to form a non-toxic glass body, and then the slag flushing pump sprays the pressurized water, and the granulation box The vitreous matter rushes to the...

Embodiment 3

[0035] An environmentally friendly treatment method for sludge containing heavy metals in a sewage treatment plant, comprising the following steps:

[0036] The weighed raw coal and the dried heavy metal-containing sludge are sent to the raw coal bunker for mixing through the conveyor belt. The mass ratio of the dried heavy metal-containing sludge to raw coal is 2:10, and then the pulverizing system performs coarse crushing and crushing successively. The ball mill is crushed until the material fineness is R90=16-20% and sent to the coal powder bin. The powder feeder adjusts the speed according to the load of the heating boiler, and sends the crushed mixed material into the cyclone furnace to burn to a molten state at 2000 ° C. , and the resulting molten material is contacted with water at 28°C in the granulation box for quenching to form a non-toxic glass body, and then the slag flushing pump sprays the pressurized water, and the granulation box The vitreous matter rushes to t...

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PUM

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Abstract

The invention belongs to the field of heavy metal pollutant treatment, in particular to an environment-friendly treatment method for heavy metal-containing sludge in a sewage treatment plant. The present invention uses coal powder to reduce the high-priced heavy metals in the sludge to non-toxic low-priced heavy metals under high temperature conditions and seals them in the glass body of the final product, and separates and collects the exhausted flue gas for reprocessing, so as to truly realize the recovery of heavy metal sludge. It is 100% environmentally friendly, and the heat generated by pulverized coal combustion can be used as a heat source for heating boilers to achieve reasonable energy distribution and green applications.

Description

technical field [0001] The invention belongs to the field of heavy metal pollutant treatment, in particular to an environment-friendly treatment method for heavy metal-containing sludge in a sewage treatment plant. Background technique [0002] With the rapid development of industrial civilization, the pollution caused by heavy metals is deteriorating step by step, especially the pollution of water sources caused by industrial wastewater containing heavy metals, such as the sewage discharged by leather tanning, printing and dyeing enterprises. After the sewage treatment plant treats the sewage, heavy metal pollutants are generally mixed into the sludge. Therefore, how to carry out environmental protection treatment of the heavy metal-containing sludge in the sewage treatment plant is a technical problem to be solved urgently by those skilled in the art. [0003] Heavy metal sludge or soil in the prior art mostly adopts engineering restoration measures, chemical restoration m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00F23G7/00F23J15/02
CPCF23G7/001F23J15/02F23J15/022B09B3/00B09B5/00F23G2209/12F23G2204/101F23G2201/80F23J2215/10F23J2217/102B09B3/40
Inventor 王慧智
Owner 河南景耀热电环保科技有限公司
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