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Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge

An inorganic composite material and sludge dehydration technology, which is applied in dehydration/drying/thickened sludge treatment, solid waste management, climate sustainability, etc., can solve problems such as alkalinity and secondary pollution, and achieve reduction of stench, High compressive strength, low price effect

Active Publication Date: 2013-04-17
江苏艾特克环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of neutral inorganic composite material which can quickly dehydrate, solidify and modify sludge, especially can deal with sludge with high water content ratio, and solve the problem that the leachate of solidified body of cement and lime-based inorganic curing agent is alkaline. At the same time, it can effectively stabilize heavy metals, persistent organic pollutants, oil and other harmful substances in the sludge, prevent their dissolution, and avoid the problem of secondary pollution; the treated sludge also has relatively high pressure resistance It can meet the requirements of landfill strength or geotechnical soil, or improve it into greening, garden and other soil and agricultural fertilizer according to the demand

Method used

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  • Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge
  • Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge
  • Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge

Examples

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Effect test

Embodiment 1

[0023] A kind of neutral inorganic composite material which is rapidly dehydrated and solidified and modified by sludge, and takes the following components by weight fraction:

[0024] 100 parts of hydraulic solidification material, which is composed of: 50 parts of hemihydrate gypsum, 50 parts of light magnesium oxide;

[0025] 80 parts of inorganic water-absorbing ash materials, paper mill incineration ash;

[0026] 20 parts of inorganic auxiliary hardening material, silica sand in foundry, particle size is 15-60 μm;

[0027] 2 parts of polymer coagulant, polyacrylamide;

[0028] 1 part of modified functional agent, get 250 parts of potassium chloride, 200 parts of calcium chloride, 22 parts of potassium permanganate, 175 parts of magnesium sulfate, 3 parts of nickel sulfate, 200 parts of sodium sulfate, 13 parts Calcium lignosulfonate and 1 part of citric acid are compounded, and 1 part of modified functional agent after compounding is taken;

[0029] The above-mentioned...

Embodiment 2

[0037] A kind of neutral inorganic composite material which is rapidly dehydrated and solidified and modified by sludge, and takes the following components by weight fraction:

[0038] 100 parts of hydraulic solidification material, which is composed of: 65 parts of hemihydrate gypsum, 35 parts of light magnesium oxide;

[0039] 100 parts of inorganic water-absorbing ash materials, paper mill incineration ash;

[0040] 30 parts of inorganic auxiliary hardening material, silica sand in foundry, particle size 80-120 μm;

[0041] 8 parts of polymer coagulant, sodium polyacrylate;

[0042] 5 parts of modified functional agent, get 200 parts of potassium chloride, 250 parts of calcium chloride, 20 parts of potassium permanganate, 150 parts of magnesium sulfate, 3 parts of nickel sulfate, 225 parts of sodium sulfite, 10 parts of Sodium lignosulfonate and 2 parts of malic acid are compounded, and 5 parts of modified functional agent after compounding are taken;

[0043] The above-...

Embodiment 3

[0051] A kind of rapid dehydration of sludge, solidification modified neutral inorganic composite material, take the following components by weight fraction:

[0052] 100 parts of hydraulic solidification material, which is composed of: 58 parts of hemihydrate gypsum, 42 parts of light magnesium oxide;

[0053] 120 parts of inorganic water-absorbing ash materials, paper mill fly ash;

[0054] 40 parts of inorganic auxiliary hardening material, silicon powder in foundry, particle size 100-150 μm;

[0055] 4 parts of polymer coagulant, sodium carboxymethyl cellulose;

[0056] 3 parts of modified functional agents, which consist of 290 parts of potassium chloride, 230 parts of calcium chloride, 25 parts of potassium permanganate, 200 parts of magnesium sulfate, 2 parts of nickel sulfate, 200 parts of sodium sulfite, 20 parts 3 parts of acryl alcohol polyoxyethylene ether and 3 parts of sodium hexametaphosphate are compounded, and 3 parts of modified functional agent after compo...

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Abstract

The invention discloses a neutral inorganic composite material for dehydration, solidification and modification of high water content sludge. The composite material comprises a powdery mixture consisting of the following components in part by weight: 100 parts of water hardened solidifying material consisting of hydrated gypsum and magnesium oxide, 80 to 120 parts of inorganic water absorption ash material, 20 to 40 parts of inorganic substance aid hardened material, 1 to 10 parts of high polymer coagulant and 1 to 5 parts of modifying functional agent. After being treated by the neutral inorganic composite material, the solidified sludge has high compressive strength; the pH of the lixivium is neutral, and meanwhile, harmful substances such as heavy metal and the like in the sludge can be effectively solidified; the treated sludge meets the requirement of landfill soil, soil for earthwork or soil for greening and farmlands; and the neutral inorganic composite material can be widely applied to the dehydration, solidification and modification of the high water content sludge such as sludge from waterworks, dredged bottom mud of rivers and lakes, residual building soil and the like.

Description

technical field [0001] The invention relates to a solidified modified material for sludge treatment, in particular to a neutral inorganic composite material for rapid dehydration and solidified modified sludge with a high water content ratio, which can be widely used in municipal sludge, pipe network sewage, etc. Dehydration, solidification and improvement of high water content sludge such as mud, industrial sewage plant sludge, water plant sludge, river channel, lake dredging sediment, construction residual soil, etc., and the treated sludge meets the requirements of landfill covering soil and geotechnical soil , or used as landscaping and farmland soil. Background technique [0002] With the development of industrial production and the increase of urban population, domestic and industrial drainage is increasing, which brings a lot of sludge; at the same time, dredging is one of the important means to improve and restore polluted rivers, lakes and other water bodies , has b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C02F11/12
CPCC04B2103/0013C04B2111/00025C04B2111/00767C04B40/0608C04B2111/00112C04B2103/0012C04B2103/0007C04B2103/008C04B28/14C04B2111/00215Y02W30/91C04B14/304C04B2103/0068C04B2103/10C04B2103/465C04B18/08C04B18/106C04B22/08C04B22/124C04B22/142C04B22/147C04B2103/0086C04B2103/40C04B18/141C04B22/14C04B24/2641C04B24/2652C04B24/38C04B24/383
Inventor 杨才千吴智仁徐畅杨国玉蒋素英
Owner 江苏艾特克环境工程有限公司
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