Fast flocculating agent and its preparation method

A flocculant and fast technology, applied in the field of fast flocculants and their preparation, can solve the problem of no iron element or aluminum element recycling, etc., and achieve the effects of low production cost, low production cost, and fast flocculation and sedimentation.

Inactive Publication Date: 2012-10-24
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the publication number is that CN101348318A Chinese invention patent reports a kind of sludge dewatering composite flocculant, and the publication number is CN101367597A Chinese invention patent reports another kind of flocculant and sludge dehydration method for sludge dewatering, these flocculants The patent is mainly to extract and process polyaluminum sulfate or polyferric sulfate through industrial by-products. The fundamental principle is to prepare adsorbents from raw materials through various chemical reactions, but there is no fundamental solution to how to make iron in the process of flocculant utilization. element or aluminum is recycled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Place the sludge and blast furnace slag powder in the mixed sedimentation tank at 600°C for 3 hours;

[0025] 2) Finely grind the sludge and blast furnace slag powder baked in step 1) into 200 mesh fine powder, and take 75% sludge and 12% blast furnace slag powder based on the weight percentage for use;

[0026] 3) Take 10% aluminum ammonium sulfate, 2% polymeric ferric sulfate and 1% additives according to the weight percentage ratio. The additives are a mixture of semi-coke powder and silica at a weight ratio of 1:1, semi-coke powder and two The particle size of silicon oxide is 100nm;

[0027] 4) Stir the mixture obtained in step 3) at 200r / min for 5 minutes to obtain a uniformly stirred mixture;

[0028] 5) Then add the sludge and blast furnace slag powder taken in step 2) to the mixture obtained in step 4), and then continue to stir at 80r / min for 60min to obtain a fast flocculant.

[0029] The prepared fast flocculant is used to treat industrial wastewater, and 1g of fl...

Embodiment 2

[0031] 1) Place the sludge and blast furnace slag powder in the mixed sedimentation tank at 700℃ for 2h;

[0032] 2) Finely grind the sludge and blast furnace slag powder baked in step 1) into 300 mesh fine powder, and take 80% sludge and 5% blast furnace slag powder based on the weight percentage for use;

[0033] 3) Mix 2% aluminum ammonium sulfate, 10% polyferric sulfate and 2% additives according to the weight percentage. The additives are a mixture of semi-coke powder and silica at a weight ratio of 1:3, semi-coke powder and two The particle size of silicon oxide is 20nm;

[0034] 4) The mixture obtained in step 3) is stirred at 80r / min for 10 minutes to obtain a uniformly stirred mixture;

[0035] 5) Add the sludge and blast furnace slag powder taken in step 2) to the mixture obtained in step 4), and then continue to stir at 200r / min for 30 minutes to obtain a fast flocculant.

[0036] The prepared fast flocculant is used to treat industrial wastewater, and 1g of flocculant is ad...

Embodiment 3

[0038] 1) Place the sludge and blast furnace slag powder in the mixed sedimentation tank at 650℃ for 3 hours;

[0039] 2) Finely grind the sludge and blast furnace slag powder baked in step 1) into 250 mesh fine powder, and take 75% sludge and 9% blast furnace slag powder according to the weight percentage for use;

[0040] 3) Mix 7% aluminum ammonium sulfate, 8% polymeric ferric sulfate and 1% additives according to the weight percentage. The additives are a mixture of semi-coke powder and silica in a weight ratio of 1:2, semi-coke powder and two The particle size of silicon oxide is 50nm and 80nm respectively;

[0041] 4) Stir the mixture obtained in step 3) at 100r / min for 8 minutes to obtain a uniformly stirred mixture;

[0042] 5) Then add the sludge and blast furnace slag powder taken in step 2) to the mixture obtained in step 4), and then continue to stir at 100r / min for 40 minutes to obtain a fast flocculant.

[0043] The prepared fast flocculant is used to treat industrial was...

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Abstract

The invention discloses a fast flocculating agent and its preparation method. The flocculating agent comprises the following chemical components by weight: 75-85% of mixed sedimentation tank sludge, 5-15% of blast furnace slag powder, 2-10% of aluminium ammonium sulfate, 2-10% of polymeric ferric sulfate and 1-2% of an additive. According to the preparation method of the invention, the aluminium ammonium sulfate, the polymeric ferric sulfate, the mixed sedimentation tank sludge, and the blast furnace slag powder are successively stirred in proportion under the condition of 80-200r/min so as to obtain the fast flocculating agent. The flocculating agent of the invention is composed of the mixed sedimentation tank sludge and the blast furnace slag powder, the surface of which has great activity and can speed up flocculation, thus reaching the purpose of fast flocculation and realizing resource utilization and high value-added utilization of solid waste.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and specifically refers to a fast flocculant and a preparation method thereof. Background technique [0002] The current industrial water treatment flocculants include inorganic flocculants and organic flocculants. The main principle is to use chemical reagents with flocculation characteristics to aggregate colloidal substances and suspended solids in wastewater and other impurities to achieve static water. The role of. The high cost and long flocculation time are the bottlenecks affecting the flocculant in wastewater treatment. At the same time, the sludge in the wastewater treatment congestion tank has not been used as a resource and has been buried as waste. Therefore, the use of sludge in the coagulation tank to make wastewater flocculants will solve the above two problems. [0003] Currently, the publication number CN101348318A Chinese invention patent reports a composite flocculant for sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 刘尚超薛改凤段爱民张垒王丽娜吴亮军刘璞张楠付本全
Owner 武钢集团有限公司
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