Sludge treatment and recycling method of urban sewage treatment plant

A technology for disposal of urban sewage and sludge, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve problems such as sludge discharge, achieve environmental protection, simple treatment methods, and easy to solve The effect of social problems

Active Publication Date: 2012-01-18
QINGDAO YI ECO ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The technical problem to be solved by the present invention is to provide a method for sludge disposal and resource utilization in urban sewage treatment plants. Utilization of mud resources, transforming it into products for people to use
[0017] A method for sludge disposal and resource utilization of urban sewage treatment plants according to the present invention, according to the composition characteristics of urban sludge itself, successfully solves the discharge problem caused by sludge, making the sludge that cannot be fired into ceramsite Clay can be fired into high-quality ceramsite without adding any auxiliary raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for disposal and resource utilization of urban sewage treatment plant sludge of the present invention comprises the following steps:

[0036] a. Drying: Use the domestic sludge of urban sewage treatment plants as raw material, dry and dehydrate the raw material sludge, so that the moisture content of the sludge is between 25 and 30%; if it is dried naturally in the sun, it will take up a lot Land and cause environmental pollution, occupy a lot of manpower, high labor intensity, affected by the weather, not conducive to production, so the material is dried;

[0037] b. Stirring: Stir the dehydrated and dried sludge evenly;

[0038] c. Granulation: Put the stirred sludge into the granulator to produce granules, and the particle size is controlled at about 25mm;

[0039] d. Sintering: Send the granulated particles into a vertical sintering furnace for sintering. The specific operation is as follows:

[0040] Add firewood from the ignition port of the sintering f...

Embodiment 2

[0055] a. Drying: use the domestic sludge of urban sewage treatment plants as raw material, dry and dehydrate the raw sludge, so that the moisture content of the sludge is about 30%;

[0056] b. Stirring: Stir the dehydrated and dried sludge evenly;

[0057] c. Granulation: Put the stirred sludge into the granulator to produce granules, and the particle size is controlled at about 30mm;

[0058] d. Sintering: Send the granulated particles into a vertical sintering furnace for sintering;

[0059] e. Unloading: unloading the burnt material from the bottom of the blast furnace;

[0060] f. Crushing: Crushing the large pieces of burnt material so that the maximum particle size of the broken material is between 28 and 32 mm;

[0061] g. Sieving: sieve the broken fired material, ceramsite with a particle size of 10-30mm and 5-20mm, ceramsite with a particle size of 0.5-5mm, and fine ceramsite with a particle size of less than 0.5mm. Powder, fine powder repeat steps a~h again unti...

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PUM

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Abstract

The invention relates to a sludge treatment and utilization method, in particular to sludge treatment and recycling method of an urban sewage treatment plant. The method is characterized in that the resident domestic sludge of the urban sewage treatment plant is used as a raw material, and is sintered into ceramsite capable of being utilized by people through the steps of drying, stirring, granulating, sintering, breaking, dedusting and screening. By adopting the urban sludge treatment and recycling method, the defect of the urban sludge is overcome; the sludge can be treated without adding other components so that the ceramsite with high quality and high performance can be sintered; and the invention not only solves the problems of discharge and stacking of the urban sludge but also changes the waste into valuable things and ensures that the urban sludge can be continuously utilized by people.

Description

technical field [0001] The invention relates to a method for sludge disposal, in particular to a method for sludge disposal and resource utilization in urban sewage treatment plants. Background technique [0002] Residential domestic sludge produced by urban sewage treatment plants is mainly the sludge discharged along with the domestic sewage of urban residents. This part of sludge mainly exists in the sewage in the form of sediments. The sludge mainly comes from the daily life of urban residents. Activities, such as washing, washing, flushing activities and other water items in the operation of catering, hotels, shopping malls and other industries. The main components of sludge in the form of sediments are: human and animal excreta, food residues, grease, hair, soil, fibers, additives and abrasives in toothpaste and cosmetic detergents, etc., solids in sludge Most of the material is combustible, accounting for about 70%. The remaining non-combustible part is mainly compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C02F11/00
Inventor 王深贾振殿关军
Owner QINGDAO YI ECO ENVIRONMENTAL PROTECTION TECH CO LTD
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