Efficient inorganic environment-friendly conditioner for deep dewatering of sludge

A deep dehydration and conditioning agent technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of not reducing pollution, not meeting sludge disposal, not meeting sanitary needs, etc., to reduce the cost of chemicals and reduce the risk of pollution , The effect of simple process

Active Publication Date: 2013-04-03
HANGZHOU WANDESI ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] From the above, it can be seen that the current concentration and mechanical dehydration can not reduce pollution, nor can it meet the sanitary needs, so it can not meet the requirements of sludge disposal. At present, there are many ways to treat sludge, but no matter what method is used , reducing the moisture content of sludge is a necessary prerequisite for other disposal methods

Method used

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  • Efficient inorganic environment-friendly conditioner for deep dewatering of sludge
  • Efficient inorganic environment-friendly conditioner for deep dewatering of sludge

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Effect test

Embodiment 1

[0026] High-efficiency inorganic environmental conditioner for deep dewatering of sludge, MgO 5%, Ca(OH) 2 45%, fly ash 30%, magnetite tailings powder 6%, Al 2 o 3 8% parts, KH 2 PO 4 6%, the cost of the conditioning agent generated according to this ratio is low, but the treatment effect of the agent is poor, the mud cake is soft, and the dehydration cycle is long.

Embodiment 2

[0028] High-efficiency inorganic environmental conditioner for deep dewatering of sludge, MgO 10%, Ca(OH ) 2 65%, fly ash 10%, magnetite tailings powder 4%, Al 2 o 3 5% parts, KH 2 PO 4 6%, the cost of the conditioner generated according to this ratio is low, and it has a skeleton with the sludge. During conditioning, the sludge is sticky, the sludge particles are small, the filtering effect is not good, and the treatment effect is slightly poor.

Embodiment 3

[0030] High-efficiency inorganic environmental conditioner for deep dewatering of sludge, MgO 40%, Ca(OH ) 2 5%, fly ash 50%, magnetite tailings powder 2%, Al 2 o 3 2% parts, KH2 PO 4 1%, the conditioner generated according to this ratio has floc formation under the microscope, but the structure is loose and unstable, the sedimentation is poor, and the dehydration efficiency is low, resulting in insufficient mud biscuit degree.

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Abstract

The invention discloses an efficient inorganic environment-friendly conditioner for deep dewatering of sludge. The efficient inorganic environment-friendly conditioner comprises the following ingredients by weight percent: 5-40% of MgO, 35-65% of Ca(OH)2, 5-50% of coal ash, 1-10% of magnetite ore tail, 1-10% of Al2O3, and 1-10% of KH2PO4. The environment-friendly conditioner is added to squeeze and dewater under the condition that the organic matter content of the municipal sludge is smaller than or equal to 45%, and the dewatering effect is obvious. The efficient inorganic environment-friendly conditioner disclosed by the invention is abundant in agent raw material source, low in price, economic and environment-friendly, and less in additive amount; the general additive amount is 10-30% of weight of dry sludge matter; the change range of the pH value of the sludge is small; the original property of the sludge is not changed; the sludge can be handled according to the property of the sludge after being dewatered; a part of active heavy metal in the sludge is cured, and the sludge disposal risk in land utilization can be reduced.

Description

technical field [0001] The invention relates to a high-efficiency inorganic conditioner, in particular to a high-efficiency inorganic environment-friendly conditioner for deep dehydration of sludge. Background technique [0002] Water is the basic condition for human existence and the most critical factor affecting and restricting social development. On the one hand, water resources are in serious shortage in most parts of our country; on the other hand, the rapid growth of population and the continuous development of industry are constantly producing a large amount of pollutants, polluting the already scarce water resources. Water shortage and water pollution are two major problems facing our country at present. Since the last century, with the continuous intensification of the relationship between man and nature, people have gradually realized that only sewage treatment and sewage reuse are one of the most effective ways to solve water shortage and water pollution. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 王慰丁超陆艳
Owner HANGZHOU WANDESI ENVIRONMENTAL PROTECTION TECH
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