Mechanical dehydration treatment method for sludge modification

A treatment method and sludge technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of land waste, uneven drying, high cost, etc., and achieve obvious results

Inactive Publication Date: 2010-08-25
张国清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing domestic sludge treatment and disposal methods are difficult to achieve the goal of effective disposal at low cost
At present, the sludge treatment methods mainly include the following: (1) incineration and heating method, which is costly and produces water vapor that pollutes the environment; (2) landfill method, which will cause waste of land and secondary pollution; ( 3) Curing technology, this method requires curing and drying to evaporate water, which will pollute the environment, and requires a large amount of space, and the drying is not uniform enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A sludge modified mechanical dehydration treatment method, including the following steps:

[0020] (1) Add glue polyphenylene amide, ferrous sulfate, lime and deodorant sodium chlorite to the original sludge with a moisture content of 80%, then stir to form original sludge A, and the stirring time is 3 minutes; The addition amount of dehydrating agent polyphenylene amide is 0.5‰ of the original sludge weight, the addition amount of deodorant sodium chlorite is 1‰ of the original sludge weight; the addition amount of lime is 2% of the original sludge weight, The amount of ferrous sulfate added is 2% of the original sludge weight;

[0021] (2) Add 30% of the weight of the original sludge to the original sludge A, continue to stir to form a sludge slurry, the stirring time is 3 minutes;

[0022] (3) The sludge slurry is processed in a crusher, so that the small liquid beads in the sludge slurry are aggregated to form large droplets to demulsify, and at the same tim...

Embodiment 2

[0025] Embodiment 2: A sludge modified mechanical dehydration treatment method, including the following steps:

[0026] (1) Add the dehydrating agent polyphenylene amide, ferrous sulfate, lime and the deodorant sodium chlorite to the original sludge with a moisture content of 83%, then stir to form the original sludge A, and the stirring time is 4 minutes; The addition amount of the dehydrating agent polyphenylene amide is 1‰ of the original sludge weight, the addition amount of the deodorant sodium chlorite is 1.5‰ of the original sludge weight; the addition amount of lime is 4% of the original sludge weight, The added amount of ferrous sulfate is 4% of the original sludge weight;

[0027] (2) Add water that accounts for 40% of the original sludge weight to the original sludge A, continue to stir to form a sludge slurry, and the stirring time is 4 minutes;

[0028] (3) The sludge slurry is processed in a coarse crusher, so that the small liquid beads in the sludge slurry are aggreg...

Embodiment 3

[0031] Embodiment 3: A sludge modified mechanical dehydration treatment method, including the following steps:

[0032] (1) Add the dehydrating agent polyphenylene amide, ferrous sulfate, lime and the deodorant sodium chlorite to the original sludge with a moisture content of 85%, then stir to form the original sludge A, and the stirring time is 5 minutes; The addition amount of the dehydrating agent polyphenylene amide is 1.5‰ of the original sludge weight, the addition amount of the deodorant sodium chlorite is 2‰ of the original sludge weight; the addition amount of lime is the original sludge weight 6% of the original sludge, the added amount of ferrous sulfate is 6% of the original sludge weight;

[0033] (2) Add water accounting for 50% of the original sludge weight to the original sludge A, continue to stir to form a sludge slurry, and the stirring time is 5 minutes;

[0034] (3) The sludge slurry is processed in a coarse crusher, so that the small liquid beads in the sludge ...

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PUM

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Abstract

The invention relates to a mechanical dehydration treatment method for sludge modification, which comprises the following steps that: (1) after dehydrating agent, ferrous sulfate, lime and deodorant are added into original sludge with water content of 80-85 percent, agitation is conducted to form original sludge A; (2) water with weight accounting for 30-50 percent of the weight of the original sludge is added in the original sludge A and agitation is continuously conducted to form sludge slurry; (3) the sludge slurry is treated in a coarse crusher to enable small liquid drops in the sludge slurry to be gathered into large liquid beads which take a demulsification effect and to remove solid impurities in the sludge slurry; (4) the sludge slurry treated by the coarse crusher is pressurized in a pressure filter to ensure that solid and liquid in the sludge slurry are separated to form sludge cakes; and (5) the sludge cakes are evenly stacked, the stacking height is 30-50cm, the sludge cakes are naturally dried for 48-72 hours and dried sludge cakes with water content of 20-30 percent are obtained. The invention has the advantages that the sludge dehydration decrement effect is obvious; and no secondary pollution is caused in the process of treatment.

Description

Technical field [0001] The invention relates to a sludge treatment method, in particular to a sludge modified mechanical dehydration treatment method. Background technique [0002] With the ever-increasing urban sewage industry, the sludge produced after sewage treatment has become a serious environmental pollution hazard. The existing domestic sludge treatment and disposal methods are difficult to achieve low-cost effective disposal goals. The current sludge treatment methods are mainly as follows: (1) Incineration and heating method, which is costly, and the water vapor generated pollutes the environment; (2) Landfill method, which will cause land waste and secondary pollution; 3) Curing technology. This method requires curing and drying to evaporate water, which will pollute the environment, and require a large amount of space, and the drying is not uniform enough. Summary of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14
Inventor 张国清
Owner 张国清
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