Method for reducing industrial sludge and improving dehydration performance of industrial sludge

A technology for industrial sludge and dehydration performance, applied in water/sludge/sewage treatment, sludge treatment, sludge oxidation treatment, etc., can solve problems affecting the normal operation of biochemical systems, secondary pollution, high equipment requirements, etc., to achieve Saving sludge dewatering operating costs, saving disposal costs, and obvious effects of sludge reduction

Active Publication Date: 2021-04-27
上海爱丽更环境科技有限公司
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AI Technical Summary

Problems solved by technology

[0004]Current sludge reduction technologies mainly include chemical, physical and biological methods. Traditional physical methods have high energy consumption, low economic benefits and high equipment requirements Shortcomings
The biological method has disadvantages such as long time for microbial domestication, difficulty in strain screening, high cost of enzymes, and easy to produce secondary pollution, etc., making it difficult to popularize and use in engineering, while chemical methods can better solve these problems
Chemical methods mainly include ozone oxidation, chlorine oxidation, Fenton oxidation, and hot alkali method, among which, the ozone oxidation method needs to be equipped with an ozone generator because of the characteristics of ozone needs to be produced and used immediately, and the equipment investment is large, while the chlorine oxidation method will generate three Chloromethane and other carcinogens lead to poor effluent quality and affect the normal operation of biochemical systems
Fenton oxidation and hot alkali method have problems such as unstable reduction effect

Method used

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  • Method for reducing industrial sludge and improving dehydration performance of industrial sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The treatment of physical, chemical, biochemical and mixed industrial sludge with a solid content of 2% in a chemical plant in Nantong includes the following steps:

[0080] S1, transfer the industrial sludge with a solid content of 2% to a sludge thickener to increase the solid content of the industrial sludge to 4%.

[0081] S2, the concentrated industrial sludge with a solid content of 4% is transferred to the sludge transfer tank until the entire sludge transfer tank (corresponding to the high liquid level 650L of the sludge transfer tank) is filled, with a stirring speed of 50rpm Stir it evenly, and the stirring time is 60min.

[0082] S3, passing the uniformly stirred industrial sludge into the heat exchanger to raise the temperature of the industrial sludge to 60°C.

[0083] S4, transfer the industrial sludge at a temperature of 60° C. to an acid reaction tank for acid reaction.

[0084] In step S4, further comprising the following steps:

[0085] S4.1, during...

Embodiment 2

[0101] The method of embodiment 2 is identical with embodiment 1, and its difference is only in:

[0102] (1) In step S1, the solid content of the industrial sludge is increased to 5%.

[0103] (2) In step S2, the stirring speed is 70 rpm, and the stirring time is 50 min.

[0104] (3) In step S3, the industrial sludge is heated up to 70°C.

[0105] (4) In step S4.1, add sulfuric acid with a concentration of 35wt% to the acid reaction tank, the stirring speed is 70rpm, and the industrial sludge is kept at 70°C;

[0106] In step S4.2, the pH is 2.2;

[0107] In step S4.3, the concentration of hydrogen peroxide is 31wt%, and the dosing quality of hydrogen peroxide is 0.08g / g industrial sludge dry weight, and the dosing time (being reaction time) of hydrogen peroxide is 75min, and the dosing ratio of hydrogen peroxide is 8 %, the feeding rate of the hydrogen peroxide dosing pump is 2.08L / h.

[0108] (5) In step S5.1, dosing concentration is 35wt% sodium hydroxide in alkali rea...

Embodiment 3

[0115] The method of embodiment 3 is identical with embodiment 1, and its difference is only in:

[0116] (1) In step S1, the solid content of the industrial sludge is increased to 8%.

[0117] (2) In step S2, the stirring speed is 80 rpm, and the stirring time is 40 min.

[0118] (3) In step S3, the temperature of industrial sludge is raised to 80°C.

[0119] (4) In step S4.1, add sulfuric acid with a concentration of 45wt% to the acid reaction tank, the stirring speed is 80rpm, and the industrial sludge is kept at 80°C;

[0120] In step S4.2, the pH is 2.4;

[0121] In step S4.3, the concentration of hydrogen peroxide is 32wt%, and the dosing quality of hydrogen peroxide is 0.09g / g industrial sludge dry weight, and the dosing time (being reaction time) of hydrogen peroxide is 80min, and the dosing ratio of hydrogen peroxide is 9 %, the feeding speed of the hydrogen peroxide dosing pump is 3.51L / h.

[0122] (5) In step S5.1, dosing concentration is 45wt% sodium hydroxide ...

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Abstract

The invention discloses a method for reducing industrial sludge and improving the dehydration performance of the industrial sludge. The method comprises the following steps: concentrating the industrial sludge; transferring the concentrated industrial sludge into a sludge transfer tank, and uniformly stirring; heating the uniformly stirred industrial sludge; transferring the heated industrial sludge into an acid reaction tank, carrying out heat preserving, and carrying out an acid reaction; transferring the industrial sludge subjected to the acid reaction into an alkali reaction tank, keeping the temperature, and carrying out alkali reaction; transferring the industrial sludge subjected to the alkali reaction into a pH regulating tank, and regulating the pH; and transferring the industrial sludge of which the pH value is adjusted into a sludge dewatering system, and carrying out dewatering treatment. After the industrial sludge is treated by the method disclosed by the invention, the sludge reduction is obvious and can reach 40-70%, the water content of the treated industrial sludge can be rapidly reduced to 60% or below through a dehydration system, more sludge outsourcing treatment cost and sludge dehydration operation cost of a production enterprise can be saved, and more enterprise productivity can be released.

Description

technical field [0001] The invention relates to the field of industrial sludge treatment and disposal, in particular to a method for reducing the amount of industrial sludge and improving the dewatering performance of industrial sludge. Background technique [0002] With the development of my country's industrialization, the amount of industrial wastewater treatment is increasing, and the resulting industrial sludge discharge is also increasing. According to the "National Hazardous Waste List", most industrial sludge is hazardous waste. Disposal costs are expensive, which brings a huge economic burden to the production enterprises. In addition, according to laws and regulations such as the "Environmental Protection Law of the People's Republic of China", "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste", "Standards for Pollution Control of Hazardous Waste Storage" (GB18597-2001) and other laws and regulations, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13C02F11/00C02F11/06C02F101/30
CPCC02F11/13C02F11/00C02F11/06C02F2101/30C02F2303/06
Inventor 卢琛梁锐振林伯儒石建华曹宗然吴广汪聪
Owner 上海爱丽更环境科技有限公司
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