CN102276132B - Composite sludge curing agent and preparation method thereof - Google Patents
Composite sludge curing agent and preparation method thereof Download PDFInfo
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- CN102276132B CN102276132B CN 201110154284 CN201110154284A CN102276132B CN 102276132 B CN102276132 B CN 102276132B CN 201110154284 CN201110154284 CN 201110154284 CN 201110154284 A CN201110154284 A CN 201110154284A CN 102276132 B CN102276132 B CN 102276132B
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Abstract
The invention belongs to the technical field of water treating, specifically relates to a composite sludge curing agent and a preparation method thereof. The composite sludge curing agent is prepared through the following steps: mixing raw materials of composite cement, lime, fly ash, aluminum sulfate, an instant type micropowder anionic polymer, a nano calcium material and polyaspartic acid at a room temperature, then uniformly stirring to complete the combination of the raw materials, wherein the weight ratio of the composite cement to the lime to the fly ash to the aluminum sulfate to the instant type micropowder anionic polymer to the nano calcium material to the polyaspartic acid is 1:(0.222-0.556):(0.444-0.778):(0.111-0.333):(0.022-0.111):(0.007-0.022):(0.0002-0.0009). According to the present invention, during using, the powder is directly added, mechanical stirring is adopted to enable the powder to be completely mixed with the sludge; after carrying out granulation for 48 hours, the water content of the resulting mixture is reduced to about 20%, and the strength of the resulting mixture can meet the requirements of the construction fill and landfill; the treated sludge has no odor, the cured sludge can be adopted as the soil for planting so as to provide the necessary nutrients for the plants, and realize the resource utilization of the sludge. In addition, with adopting the composite sludge curing agent provided by the present invention to carry out curing treatment for the sludge, the use amount of the composite sludge curing agent is less, the forming time of the cured product is short, the strength of the formed cured product is high, the water content is low, and the water-resistant property is good.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to the invention belongs to chemical technology field, be specifically related to a kind of compound sewage solidifying agent and preparation method thereof.
Background technology
The municipal sludge complicated component contains a large amount of microorganisms, pathogenic agent, heavy metal and organic pollutant etc.Sludge quality accounts for the 0.3%-0.5% of sewage quantity usually, advanced treatment, and sludge quantity can increase 0.5-1 doubly.The dried mud 30 * 10 of the at present annual discharging in China municipal sewage plant
4Ton, and with annual about 10% speed increment.In addition, along with the development of global economy and the increase of improving earth geographical environment activity, the dredging operation in coastal and inland river and lake, and the desilting work of city water channel is more and more.
Because these mud or sludge granules are little, be difficult for dehydration, low bearing capacity, organic content is high, the mobile cause such as large, the engineering that can't directly be used as in reclamation, dyke building, the road engineering is banketed.Mud is carried out the utilization of resources by solidification technology to be become earth working material or can solve a series of difficult problems in the sludge treatment as the preprocessing means that landfill is disposed.Exploitation highly effective sludge solidifying agent is the key of this treating processes.
Domestic and international conventional way is to add a large amount of stopping composition such as sand in the Sludge landfill process, but do like this Sludge landfill cost is increased greatly, also reduces the effective rate of utilization of landfill yard simultaneously.Recent study is found, in municipal sludge, add complex cement, flyash, lime and can improve preferably its landfill soil mechanical properties, municipal sludge can carry out landfill through maintenance after a while after solidifying pre-treatment, can greatly improve the security that its landfill is disposed.
For the solidification treatment of mud, mud, generally adopt at present cement, lime etc. as solidifying agent.Portland cement, lime setting and harden are slow, their part sedimentations before will occurring not condensing in the high water-solid ratio situation, and mud organic substance content is high, can hinder the hydration reaction of cement, and solidification effect is poor even can't carry out.In addition, cement is high as the solidifying agent incorporation.
The present invention is by mixing complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, several raw materials of poly aspartic acid, stir, mechanical mill to particle diameter less than 200 orders, developed a kind of compound type sludge solidifying agent.Tai-Ace S 150 and anionic polymer can dewater to mud first, and complex cement, lime, flyash etc. generate new hydrated product under the effect of water, make the fixed mud sclerosis of wish.The Namigai diffuse forces medicament of the present invention to be diffused into very soon in the mud, and solidification effect is good; And effectively change its redox potential, eliminate smelly root.
Summary of the invention
The object of the present invention is to provide a kind of compound type sludge solidifying agent and preparation method thereof, to solve a large amount of disposal of sludge problems that produce in municipal sewage plant and the hydro project.
A kind of compound type sludge solidifying agent that the present invention proposes, this solidifying agent comprises following component: complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material.The weight ratio of its main ingredient is: complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, poly aspartic acid are 1:(0.222 ~ 0.556): (0.444 ~ 0.778): (0.111 ~ 0.333): (0.022 ~ 0.111): (0.007 ~ 0.022): (0.0002 ~ 0.0009).
Among the present invention, described micro mist high molecular polymer is instant type anionic polyacrylamide white crystalline powder.Be the commercially available prod, molecular weight is 1000-1500 ten thousand, and the negatively charged ion degree is 25-30%.
Among the present invention, described complex cement is composite Portland cement.
Among the present invention, the particle diameter of described Namigai material is less than 200 orders.
Among the present invention, described poly aspartic acid is the commercially available prod, solid content 40%.
A kind of compound type sludge solidifying agent preparation method that the present invention proposes, concrete steps are: at ambient temperature, complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, poly aspartic acid are mixed, stir, finish the oxidative polymerization of stock yard, and be ground to particle diameter less than 200 orders, namely obtain product.
Need not before the present invention adds to dissolve in advance, directly add pulvis, mechanical stirring mixes itself and mud and gets final product.
The present invention uses composite synergistic principle, gives full play to the effect of solidifying agent, sorbent material, wedding agent, amendment, mud is solidified rapidly and reaches the purpose of improving environment.
When being used for solidification treatment, sial base vitreum excites lower at the alkaline condition of appropriateness, crystal lattice rearrangement or recrystallization occur, it is pozzolanic reaction, significantly promote gain in strength, active inorganic materials flyash can form crystallization particle and space net rack, and be conducive to get rid of moisture in mud as passage early stage, later stage is conducive to increase concretion body strength as skeleton.
The effect of lime is as follows: calcium oxide and part water are combined into calcium hydroxide, also can react with qualitative silicic acid or aluminum oxide.The effect of alkaline matter is increased the sludge pH value; Exothermic heat of reaction raises the mud temperature; Combine free-water in the resultant of reaction, the heat that simultaneous reactions produces can be evaporated a part; The sterilization but temperature and pH value raise, heavy metal-passivated ion.
The Namigai material is porous material, has huge specific surface area, has very high chemically reactive, and high adsorption capacity has extremely strong absorption and processing power to the phosphorus in the mud; The nano material diffustivity is strong, and quick permeation is diffused in the mud medicament of the present invention very soon, and solidification effect is good; Namigai can the smelly key condition of effectively control break anaerobism, changes its redox potential, and smelly root is eliminated in the growth of control anaerobion.
Poly aspartic acid is the environmental protection chemical, but the polyvalent metal ions such as chelating calcium, magnesium, copper, iron, and the poly aspartic acid of certain molecular weight can enriched in nitrogen, phosphorus, heavy metal and nitrogen phosphorus nutrition element are to the release of environment in the reduce mud.In addition, poly aspartic acid is as superpolymer, has stronger water absorbing properties after composite with other components of solidifying agent.
Effect inorganic and organic floculant is the bridging property between enhanced granule, improves its curing speed, strengthens cured article intensity.
Exist the proportioning an of the best between the amount of several materials and complex cement, this is owing to contain a certain amount of calcium oxide in flyash and lime, they make the volume of solidification sludge produce certain expansion in solidification process, can promote the intensity of solidified earth when its swell increment is suitable.But when expansion is excessive, destroy again hydrated calcium silicate established cementation between mud, make on the contrary strength degradation.
Compound type sludge solidifying agent of the present invention has following advantage: seepage force is strong, and speed is fast, and dosing is few; The cured article high-early-strength that forms, solidification effect is good, guarantees that simultaneously later strength can not reduce; Can remove the mud stink; Reduce the release in the environment of heavy metal and nitrogen phosphorus.
Embodiment
The characteristics that the invention is further illustrated by the following examples, but these embodiment limit the scope of the invention by any way.
Embodiment 1:
The preparation of solidifying agent: with complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, several solid material mixings of poly aspartic acid, be ground at normal temperatures particle diameter less than 200 orders, its components by weight is as follows:
48 parts of complex cements
20 parts in lime
24 parts in flyash
6 parts in Tai-Ace S 150
1.5 parts of instant type micro mist anionic polymers
0.49 part of Namigai material
0.01 part of poly aspartic acid
Mud is dug out from the lake, remove large block foreign material wherein.The water ratio of measuring mud is 46.5%.500g mud is dropped in the agitator, add the 25g solidifying agent, mechanical stirring makes its even mixing, and stir about is gradually hardening of mud after 2 minutes, stops to stir.After the granulation 2 days, its water ratio is reduced to 21.3%, and testting its intensity with an axial compression contracting trier is 610KN/m
2, being equivalent to the 3rd class engineering earth, the mud odorless can be used as building landfill soil, and the brick that also can utilize grinding tool to make different shape is used for building.Owing to be rich in the required organic matter of plant-growth in the mud, be a kind of valuable organic fertilizer, be proper as the fertilizer of Garden Greenland, the base soil in the time of can being used for substituting the greenery patches construction.
Embodiment 2:
The preparation of solidifying agent: with complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, several solid material mixings of poly aspartic acid, be ground at normal temperatures particle diameter less than 200 orders, its components by weight is as follows:
40 parts of complex cements
22 parts in lime
25 parts in flyash
8.5 parts in Tai-Ace S 150
1 part of instant type micro mist anionic polymer
0.49 part of Namigai material
0.01 part of poly aspartic acid
Mud is dug out from the lake, remove wherein block and club class foreign material.The water ratio of measuring mud is 45.7%.500g mud is dropped in the agitator, add the 25g solidifying agent, mechanical stirring makes its even mixing, and stir about is gradually hardening of mud after 2 minutes, stops to stir.After the granulation 2 days, its water ratio is reduced to 20.8%, and testting its intensity with an axial compression contracting trier is 585KN/m
2, and mud odorless after solidifying can satisfy the requirement of banketing of landfill and building, the brick that also can utilize grinding tool to make different shape is used for building.Solidification sludge after the pulverizing contains the trace elements such as the nutritive elements such as abundant organism and nitrogen, phosphorus, potassium and calcium, magnesium, copper, iron, zinc, can play the change Soil structure, increase soil fertility, the effect of Promoting plant growth, can be used as the fertilizer of Garden Greenland, realize the recycling of mud.
Embodiment 3:
The preparation of solidifying agent: with complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, several solid material mixings of poly aspartic acid, be ground at normal temperatures particle diameter less than 200 orders, its components by weight is as follows:
55 parts of complex cements
13 parts in lime
25 parts in flyash
5.5 parts in Tai-Ace S 150
1 part of instant type micro mist anionic polymer
0.49 part of Namigai material
0.01 part of poly aspartic acid
Certain sewage treatment plant dewater sludge water ratio 79.05%.500g mud is dropped in the agitator, add the 50g solidifying agent, mechanical stirring makes its even mixing, and stir about is gradually hardening of mud after 2 minutes, stops to stir.After the granulation 2 days, water ratio is reduced to 25.6%, and testting its intensity with an axial compression contracting trier is 350KN/m
2, the mud odorless can satisfy landfill and for building the requirement of banketing, the brick that also can utilize grinding tool to make different shape is used for building.Owing to be rich in the needed various organic matters of plant-growth in the excess sludge, the trace elements such as the nutritive element such as nitrogen, phosphorus, potassium and calcium, magnesium, copper, iron, zinc so the mud after solidifying can be used as the fertilizer of Garden Greenland, thereby are realized the recycling of mud.
Embodiment 4:
The preparation of solidifying agent: with complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material, several solid material mixings of poly aspartic acid, be ground at normal temperatures particle diameter less than 200 orders, its components by weight is as follows:
50 parts of complex cements
17 parts in lime
26.5 parts in flyash
5 parts in Tai-Ace S 150
1 part of instant type micro mist anionic polymer
0.49 part of Namigai material
0.01 part of poly aspartic acid
Certain sewage treatment plant dewater sludge water ratio 80.35%.500g mud is dropped in the agitator, add the 50g solidifying agent, mechanical stirring makes its even mixing, and stir about is gradually hardening of mud after 2 minutes, stops to stir.After the granulation 2 days, moisture percentage in sewage sludge is reduced to 28.3%, and testting its intensity with an axial compression contracting trier is 314KN/m
2, the mud odorless can satisfy landfill and for building the requirement of banketing, also can make brick for building.Solidification sludge after the pulverizing contains the trace elements such as the nutritive elements such as abundant organism and nitrogen, phosphorus, potassium and calcium, magnesium, copper, iron, zinc, can play the change Soil structure, increase soil fertility, the effect of Promoting plant growth, can be used as the fertilizer of Garden Greenland, realize the recycling of mud.
Claims (4)
1. composite sludge curing agent, it is characterized in that described solidifying agent is comprised of complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material and poly aspartic acid, the weight ratio of complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material and poly aspartic acid is 1:(0.222 ~ 0.556): (0.444 ~ 0.778): (0.111 ~ 0.333): (0.022 ~ 0.111): (0.007 ~ 0.022): (0.0002 ~ 0.0009); Described instant type micro mist anionic polymer is instant type anionic polyacrylamide white crystalline powder.
2. compound type sludge solidifying agent according to claim 1 is characterized in that described complex cement is composite Portland cement.
3. compound type sludge solidifying agent according to claim 1 is characterized in that the particle diameter of described Namigai material is less than 200 orders.
4. the preparation method of a compound type sludge solidifying agent as claimed in claim 1, it is characterized in that concrete steps are as follows: at ambient temperature, complex cement, lime, flyash, Tai-Ace S 150, instant type micro mist anionic polymer, Namigai material and poly aspartic acid are mixed, stir, finish the oxidative polymerization of stock yard, and be ground to particle diameter less than 200 orders, namely obtain desired product.
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| CN 201110154284 CN102276132B (en) | 2011-06-10 | 2011-06-10 | Composite sludge curing agent and preparation method thereof |
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| CN102276132B true CN102276132B (en) | 2013-02-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103787558A (en) * | 2012-11-01 | 2014-05-14 | 深圳市海川实业股份有限公司 | Heavy metal stabilizer used for sludge treatment, and method for treating sludge by adopting it |
| CN107245338B (en) * | 2016-08-22 | 2021-04-09 | 浙江中垚环保科技有限公司 | Composite preparation for repairing and improving soil structure and preparation method thereof |
| CN107585984A (en) * | 2017-10-30 | 2018-01-16 | 江苏和合环保集团有限公司 | A kind of composite sludge curing agent |
| CN114084964B (en) * | 2020-08-24 | 2023-02-24 | 中国石油化工股份有限公司 | Aromatic organic compound wastewater biological treatment accelerant and preparation method and application thereof |
| CN112094039A (en) * | 2020-09-17 | 2020-12-18 | 杭州传一科技有限公司 | Electroplating sewage sludge dewatering curing agent and preparation method thereof |
| CN112479514A (en) * | 2020-11-25 | 2021-03-12 | 同济大学 | Composite sludge dewatering curing agent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005063339A1 (en) * | 2005-10-18 | 2007-04-19 | Henkel Kgaa | Use of halide-poor polymer solutions with cationic amino groups |
| CN101786777A (en) * | 2010-03-19 | 2010-07-28 | 东莞市绿适环保科技有限公司 | The prescription that is used to handle domestic sludge or animal excrement based on nanotechnology |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005063339A1 (en) * | 2005-10-18 | 2007-04-19 | Henkel Kgaa | Use of halide-poor polymer solutions with cationic amino groups |
| CN101786777A (en) * | 2010-03-19 | 2010-07-28 | 东莞市绿适环保科技有限公司 | The prescription that is used to handle domestic sludge or animal excrement based on nanotechnology |
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