Method and device for processing sludge

A technology for sludge and dry sludge, which is applied in the oxidation treatment of sludge, dewatering/drying/concentrating sludge treatment, and by-product vaporization, etc., which can solve the problems of high cost, pollution of waste gas and residue, and high energy consumption of sludge treatment. , to achieve the effect of saving fuel costs, saving raw coal and saving costs

Active Publication Date: 2008-05-14
BEIJING JINYU MANGROVE ENVIRONMENTAL PROTECTION TECH +1
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above problems, in order to overcome the problems of high energy consumption, high cost and pollution of waste gas and waste residue in the sludge treatment i

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for processing sludge
  • Method and device for processing sludge

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] 300 tons of wet sludge with a moisture content of 83% produced by the municipal sewage plant is transported to the cement plant (the cement plant produces 3,000 tons of clinker per day) and stored in the wet sludge receiving system. It is transported to the sludge drying system through the transportation system. According to production needs, the wet sludge with a moisture content of 83% is dried to a dry sludge with a moisture content of 2%-10%. The dried sludge can be directly introduced into the new dry-process cement rotary kiln for incineration, or it can be stored in the dry sludge storage system. The dry sludge with a moisture content of 2%-10% obtained after drying is sent to the kiln for incineration through the kiln head coal injection nozzle or the kiln tail precalciner of the new dry-process cement rotary kiln. Incineration conditions are 1450~1800℃, 10~30 minutes. The composition and content of the sludge residue after incineration are listed...

Example Embodiment

[0042] Example 2

[0043] The sludge produced in the municipal sewage plant is dried and incinerated as described in Example 1, except that the wet sludge is dried in the sludge drying system to a moisture content of 10% to 35%, and the new dry cement The kiln tail precalciner in the rotary kiln is incinerated. The composition and content of the sludge residue after incineration are listed in Table 3.

Example Embodiment

[0044] Example 3

[0045] The river bottom sludge is mechanically dewatered to a moisture content of 70%-95%, and the disposal amount of the sludge is determined according to the production scale of the cement plant and the specific composition of the sludge every day. That is, the amount of wet sludge that can be dried is determined according to the heat generated by the cement plant. Then determine the amount of sludge disposal based on the content of heavy metals in the sludge at the bottom of the river, calculate whether the cement produced after using these sludges as raw materials for cement production meets national standards, and if not, reduce the amount of sludge disposal.

[0046] The river bottom sludge is then transported to the cement plant and stored in the wet sludge receiving system. The sludge is first transported to the sludge drying system through the transportation system, and the sludge containing 70%-95% water is dried to 2%-35% according to the same method ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a sludge treatment method and the device, in particular to a drying and treating sludge method and the device with a new type drying cement rotary kiln adopted as the sludge incineration system. The invention comprises the following steps to treat the sludge: the sludge is dried with the residual heat produced in the work course of the sludge incineration system; the waste gas produced during the drying course is directed and processed in a waste gas process system until reaching the standard, and then the waste gas is discharged out; the obtained dry sludge is delivered in the sludge incineration system and directly burnt without adding any auxiliary combustion materials, and the obtained residue is used to produce cement. The invention has the advantages of saving the fuels for drying sludge, avoiding the pollution of waste gas and residue, saving the processing cost of waste gas and residue, thus achieving the aims of energy saving and environment protection.

Description

technical field [0001] The present invention relates to a method and device for drying and disposing of sludge, more specifically, the present invention relates to a method and device for drying and disposing of sludge using waste heat of a sludge incineration and disposal system. Background technique [0002] The sludge of urban sewage treatment plants is the residue left after the sewage plants collect and treat the sewage in urban areas and discharge the effluent up to standard. This kind of sludge generally refers to dewatered sludge with a moisture content of about 80%, mainly containing low-level organic matter, polycyclic aromatic hydrocarbons, heterocyclic compounds, organic sulfides, volatile odorous substances, organic fluorides, etc. Among them, the low-level organic matter can be amino acids, humic acid, bacteria and their metabolites. In addition, it also contains inorganic substances and heavy metal substances such as mercury, cadmium, and lead. [0003] Ther...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F11/06C02F11/12
CPCY02W10/40
Inventor 赵启刚田巍孙伟舰
Owner BEIJING JINYU MANGROVE ENVIRONMENTAL PROTECTION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap