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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
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 in the prior art, and reduce the cost of waste residue and waste gas treatment in the later stage, the present invention provides an improved dry incineration disposal sludge method

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  • Method and device for processing sludge
  • Method and device for processing sludge

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Embodiment 1

[0041] Transport 300 tons of wet sludge with a water content of 83% from the urban sewage plant to a cement plant (the cement plant produces 3,000 tons of clinker per day) and store it in the wet sludge receiving system. Transported to the sludge drying system through the transport system. According to production needs, the wet sludge with a moisture content of 83% is dried to dry sludge with a moisture content of 2% to 10%. The dried sludge can be directly imported into the new dry process cement rotary kiln for incineration, or it can be stored in the dry sludge storage system first. After drying, the dry sludge with a moisture content of 2% to 10% is put into the kiln for incineration through the coal injection nozzle at the kiln head of the new dry process cement rotary kiln or the precalciner at the kiln tail. The incineration conditions are 1450-1800°C for 10-30 minutes. The composition and content of the incinerated sludge residue are listed in Table 3. The heat in t...

Embodiment 2

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

Embodiment 3

[0045] Mechanically dehydrate the river bottom sludge to a water content of 70% to 95%, and determine the amount of sludge to be disposed of according to the production scale of the cement plant and the specific components of the sludge every day. That is, according to the heat generated by the cement plant, the amount of wet sludge that can be dried is determined. Then determine the amount of sludge disposal according to the content of heavy metals in the river bottom sludge, and calculate whether the cement produced after using these sludge as raw materials for cement production meets the national standard. If it does not meet the standard, 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. First transport to the sludge drying system through the transport system, and dry the sludge with a water content of 70% to 95% to 2% to 35% according to the same method as in Exampl...

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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

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Application Information

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IPC IPC(8): C02F11/06C02F11/12
CPCY02W10/40
Inventor 赵启刚田巍孙伟舰
Owner BEIJING JINYU MANGROVE ENVIRONMENTAL PROTECTION TECH
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