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A fast dehydration curing agent

A rapid dehydration and curing agent technology, which is applied in the direction of fixed/solidified sludge treatment, water pollutants, chemical instruments and methods, etc., can solve the problem of high pH value of dehydrated and solidified sediment cake and tail water, low heavy metal leaching content, Unsatisfactory curing effect and other problems, to achieve the effect of meeting the environmental capacity requirements, accelerating coagulation and settlement, and high unconfined compressive strength

Active Publication Date: 2021-09-21
广州珠科院工程勘察设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of slow solidification speed, high pH value of dehydrated and solidified bottom mud cake and tail water, unsatisfactory solidification effect and high heavy metal leaching after solidification in the related art, the present invention provides a sludge solidification speed fast, dewatered bottom mud Rapid sediment dehydration and solidification agent with low pH value of mud cake and tail water, and low heavy metal leaching content after solidification

Method used

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Embodiment 1

[0039] A rapid dehydration curing agent, including the following components:

[0040] 20 parts of iron sulfate,

[0041] 20 parts of ferrous sulfate,

[0042] 15 parts of silicon powder,

[0043] 10 parts of organic bentonite,

[0044] 30 parts of quicklime,

[0045] 0.01 parts of polyacrylamide (M=12 million).

[0046] The preparation method of described dehydration curing agent is as follows:

[0047] Accurately weigh the components in parts by weight, mix and grind until the particle size is less than 200 mesh, and obtain the product.

[0048] Sludge treatment method using fast dehydration curing agent:

[0049] The fast dehydration solidifying agent that is prepared is added to the sludge of a certain lake in Guangzhou (the initial moisture content is 88.3%, the lead leaching content is 9.26mg / kg, the mercury leaching content is 0.56mg / kg, and the arsenic leaching content is 7.56mg / kg. kg) in solidification test; the addition of the solidifying agent is 10% of the s...

Embodiment 2

[0051] A rapid dehydration curing agent, including the following components:

[0052] 25 parts of iron sulfate,

[0053] 15 parts of ferrous sulfate,

[0054] 10 parts of silicon powder,

[0055] 10 parts of organic bentonite,

[0056] 15 parts quicklime,

[0057] 0.01 part of polyacrylamide (M=12 million).

[0058] The preparation method of described dehydration curing agent is as follows:

[0059] Accurately weigh the components in parts by weight, mix and grind until the particle size is less than 200 mesh, and obtain the product.

[0060] Sludge treatment method using fast dehydration curing agent:

[0061]The fast dehydration solidifying agent that is prepared is added to the sludge of a certain lake in Guangzhou (the initial moisture content is 88.3%, the lead leaching content is 9.26mg / kg, the mercury leaching content is 0.56mg / kg, and the arsenic leaching content is 7.56mg / kg. kg) in solidification test; the addition of the solidifying agent is 10% of the sludge...

Embodiment 3

[0063] A rapid dehydration curing agent, including the following components:

[0064] 30 parts of iron sulfate,

[0065] 10 parts of ferrous sulfate,

[0066] 20 parts of silicon powder,

[0067] 20 parts of organic bentonite,

[0068] 20 parts quicklime,

[0069] 0.02 parts of polyacrylamide (M=12 million).

[0070] The preparation method of described dehydration curing agent is as follows:

[0071] Accurately weigh the components in parts by weight, mix and grind until the particle size is less than 200 mesh, and obtain the product.

[0072] Sludge treatment method using fast dehydration curing agent:

[0073] The fast dehydration solidifying agent that is prepared is added to the sludge of a certain lake in Guangzhou (the initial moisture content is 88.3%, the lead leaching content is 9.26mg / kg, the mercury leaching content is 0.56mg / kg, and the arsenic leaching content is 7.56mg / kg. kg) in solidification test; the addition of the solidifying agent is 10% of the slud...

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Abstract

The invention relates to the field of sewage sludge treatment, in particular to a rapid dehydration and solidification agent for lake bottom mud. The rapid dehydration curing agent component of the present invention includes ferric sulfate, ferrous sulfate, silicon powder, bentonite, quicklime and polyacrylamide. The invention adopts the compounding of organic and inorganic materials to obtain a rapid dehydration and solidification agent for lake and reservoir bottom mud with fast dehydration and solidification speed, low pH value of dewatered bottom mud cake and tail water, and low leaching content of heavy metals after solidification .

Description

technical field [0001] The invention relates to the field of sewage sludge treatment, in particular to a rapid dehydration and solidification agent for lake bottom mud. Background technique [0002] Silt usually refers to the mixture (sediment, clay, organic matter and various minerals) in the water body, which sinks to the bottom under long-term physical, chemical and biological effects, and forms sediments (Wang Xue, Fan Guisheng. Fenhe Study on the distribution characteristics of lead, cadmium and mercury in river courses and beaches [J]. People's Yellow River, 2015, (10): 74-77.). Water bodies such as rivers and lakes produce silt. [0003] Lake and reservoir dyed sludge is an extremely complex heterogeneous body composed of inorganic silicon calcium, organic debris, bacterial cells, inorganic-inorganic colloidal particles, etc., which are mixed with sediment, fiber, animal and plant residues in domestic sewage or industrial and mining wastewater. Solid particles such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/148C02F101/20
CPCC02F11/008C02F2101/20C02F11/148
Inventor 黄伟杰陈豪刘学智张大伟闫晓满李慧婧张亮亮刘红岩张欣
Owner 广州珠科院工程勘察设计有限公司
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