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High-efficiency sludge dehydrating agent

A technology of sludge dehydrating agent and dehydrating agent, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of unfavorable resource utilization, etc., and achieve favorable resource utilization, significant dehydration effect and dehydration efficiency, and sludge The effect of specific resistance reduction

Inactive Publication Date: 2018-03-02
嘉兴锦润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the market, ferric chloride is used for sludge dehydration. Although ferric chloride and the sludge to be treated (absolutely dry) are less than 8%, the sludge after pressure filtration contains a large amount of chloride ions, which is not conducive to subsequent resource utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of high-efficiency sludge dewatering agent

[0019] Take 5kg of 100mesh magnesium oxide, 30kg of calcium sulfate, and 5kg of dextrin, mix them evenly, and configure them into mixture A; 50kg of polyferric sulfate with a total iron content of 19%, 10kg of sodium nitrate, and 30kg of aluminum sulfate, mix them evenly, and configure them into mixture B ;Adopt 3kg of cationic polyacrylamide with a molecular weight of 8,000,000 and an ionization degree of 40%, mix uniformly with 0.3kg of nano-titanium dioxide, and configure it into mixture C; Yellow powder high-efficiency sludge dewatering agent.

[0020] (2) Comparative test of sludge dehydration

[0021] Take high-temperature anaerobic sludge with a moisture content of 97% as the treatment object, take two parts of 1000kg (solid content of absolute dry sludge is 30kg), and add 2.1kg of ferric chloride and 0.5kg of conventional cationic polyacrylamide to the first part and mix them evenly , pumped into the...

Embodiment 2

[0023] (1) Preparation of high-efficiency sludge dewatering agent

[0024] Take 7.5kg of 200-mesh magnesium oxide, 50kg of calcium sulfate, and 7.5kg of dextrin, mix them uniformly, and configure them into mixture A; 60kg of polyferric sulfate with a total iron content of 20%, 15kg of sodium nitrate, and 40kg of aluminum sulfate, mix them evenly, and configure them into Mixture B; use 4kg of cationic polyacrylamide with molecular weight of 12 million and ionicity of 50%, and mix uniformly with 0.4kg of nano-zinc oxide to configure mixture C; mix 65kg of mixture A, 115kg of mixture B and 4.4kg of mixture C evenly, and configure it into 184.4kg light yellow powder high-efficiency sludge dewatering agent.

[0025] (2) Comparative test of sludge dehydration

[0026] Take the high-temperature anaerobic sludge with a moisture content of 95% as the treatment object, take two parts of 1000kg (the solid content of the dry sludge is 50kg), and add 6kg of polyaluminum ferric chloride an...

Embodiment 3

[0028] (1) Preparation of high-efficiency sludge dewatering agent

[0029] Take 15kg of 300-mesh magnesium oxide, 70kg of calcium sulfate, and 15kg of dextrin, mix them evenly, and configure them into mixture A; 70kg of polyferric sulfate with a total iron content of 21%, 20kg of sodium nitrate, and 50kg of aluminum sulfate, mix them evenly, and configure them into mixture B ;Use 5kg of cationic polyacrylamide with a molecular weight of 15 million and ionicity of 70% and 0.5kg of nano-silicon dioxide to mix uniformly to form a mixture C; 100kg of mixture A, 140kg of mixture B and 5.5kg of mixture C are uniformly mixed to form 245.5kg Pale yellow powder high-efficiency sludge dewatering agent.

[0030] (2) Comparative test of sludge dehydration

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Abstract

The invention discloses a high-efficiency sludge dehydrating agent including a mixture A, a mixture B and a mixture C, and the mixture A comprises multiple components in parts by mass: 5-15 parts of magnesium oxide, 30-70 parts of calcium sulfate, and 5-15 parts of dextrin; the mixture B comprises multiple components in parts by mass: 50-70 parts of polyferric sulfate, 10-20 parts of sodium nitrate, and 30-50 parts of aluminum sulfate; the mixture C comprises the multiple components in parts by mass: 3-5 parts of cationic polyacrylamide, and 0.3-0.5 part of a nanomaterial. The mixture A and the mixture B are successively added and stirred evenly, then the mixture C is added, then the mixture is slowly stirred evenly and is subjected to mechanical dehydration, the sludge moisture content isreduced to 60% or less, sludge after dehydration can be used as a fertilizer raw material, a fuel raw material and a building material raw material, and no secondary pollution exists.

Description

technical field [0001] The invention relates to a high-efficiency dehydrating agent that can be used for high-temperature anaerobic sludge in urban sewage treatment plants. Background technique [0002] After the sludge has been concentrated, its water content is usually still above 94%, and it is fluid and has a large volume, so sludge dehydration is still required. Sludge dewatering is one of the most expensive but extremely critical processes in sludge treatment. The performance of sludge dewatering is directly related to the quality of the entire sludge treatment system. In recent years, the sludge treatment and disposal technology of urban sewage treatment plants tends to be comprehensive utilization of resources, especially the large-scale promotion of thermal hydrolysis technology, which provides good biodegradation conditions for high-temperature anaerobic digestion, but at the same time encounters high-temperature anaerobic Sludge dewatering is a very difficult pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
CPCC02F11/14
Inventor 仝武刚
Owner 嘉兴锦润环保科技有限公司
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