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Salinization sludge treatment method

A sludge treatment and salinization technology, applied in electrochemical sludge treatment, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of unfriendly environment, sludge bricks that cannot be used as building materials, and heavy metal recovery The use of value is not excavated and other problems, to achieve the effect of environmental friendliness

Inactive Publication Date: 2020-08-25
湖北华德莱节能减排科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Through the above analysis, the problems and defects of the prior art are: (1) in the prior art, roasting will produce harmful gas, pollute the environment twice, and are not friendly to the environment
[0005] (2) In the prior art, the pressure molding and roasting processes need to consume more energy, wasting energy resources
[0006] (3) In the existing technology, the compressive strength of bricks will decrease with the increase of sludge doping, and whether the compressive strength is sufficient as a building material always needs to be considered
[0007] (4) In the existing technology, the heavy metals in the sludge have not been effectively extracted, recycled, and utilized. As building materials, they may cause potential harm to the human body, and the recycling value of heavy metals has not been tapped
[0008] (5) In the prior art, the garden utilization value of sludge as organic matter has not been excavated
[0014] The significance of solving the above problems and defects is: (1) Harmful gases will pollute the air again, causing environmental pollution, which will eventually cause harm to the human body
[0015] (2) Using more energy to treat sludge will cause waste of energy
[0016] (3) Excessive sludge doping will always affect the compressive strength of sludge bricks, so that sludge bricks cannot be used as building materials
[0017] (4) Heavy metals remaining in sludge may be potentially harmful to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The present invention proposes a method for treating salinized sludge, the steps are:

[0060] (1) Send the salinized sludge into a crusher for processing to obtain crushed sludge, and the crushing ratio of the crusher is 10.

[0061] (2) Put the crushed sludge into the filter bag.

[0062] (3), put the filter bag into the electrochemical rinsing machine and feed tap water and the circulating water in step (4) to it, and get the desalted sludge contained in the filter bag by electrochemical rinsing while stirring, For rinsing filtrate and solid calcium hydroxide, the mass ratio of water and sludge added is 2:1, the stirring and rinsing time is 45 minutes, the removal rate of calcium salt after leaching is above 90%, and the anode used in electrochemical leaching machine The plate is a titanium-based iridium dioxide coated electrode, and the cathode plate is a titanium electrode plate.

[0063] (4) Put the filter bag on the sieve net, filter by gravity, and the gravity...

Embodiment 2

[0067] The present invention proposes a method for treating salinized sludge, the steps are:

[0068] (1) Send the salinized sludge into a crusher for processing to obtain crushed sludge, and the crushing ratio of the crusher is 3.

[0069] (2) Put the crushed sludge into the filter bag.

[0070] (3), put the filter bag into the electrochemical rinsing machine and feed tap water and the circulating water in step (4) to it, and get the desalted sludge contained in the filter bag by electrochemical rinsing while stirring, For rinsing filtrate and solid calcium hydroxide, the mass ratio of water and sludge added is 5:1, the stirring and rinsing time is 60 minutes, the removal rate of calcium salt after leaching is over 90%, and the anode used in electrochemical leaching machine The plate is a titanium-based iridium dioxide coated electrode, and the cathode plate is a titanium electrode plate.

[0071] (4) Put the filter bag on the sieve net, filter by gravity, and the gravity f...

Embodiment 3

[0075] The present invention proposes a method for treating salinized sludge, the steps are:

[0076] (1) Send the salinized sludge into a crusher for processing to obtain crushed sludge, and the crushing ratio of the crusher is 6.

[0077] (2) Put the crushed sludge into the filter bag.

[0078] (3), put the filter bag into the electrochemical rinsing machine and feed tap water and the circulating water in step (4) to it, and get the desalted sludge contained in the filter bag by electrochemical rinsing while stirring, For rinsing filtrate and solid calcium hydroxide, the mass ratio of water and sludge added is 3:1, the stirring and rinsing time is 40 minutes, and the removal rate of calcium salt after leaching is over 90%. The anode used in the electrochemical leaching machine The plate is a titanium-based iridium dioxide coated electrode, and the cathode plate is a titanium electrode plate.

[0079] (4) Place the filter bag on the sieve, filter by gravity, and the gravity...

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Abstract

The invention belongs to the technical field of salinization sludge treatment, and discloses a salinization sludge treatment method. The method comprises the following steps: feeding salinized sludgeinto a crusher for treatment to obtain crushed sludge, so a contact area of subsequent sludge particles and water is increased; then stirring and mixing the crushed sludge and water, and recovering and removing salt in the sludge through an electrochemical leaching effect so as to obtain desalinized sludge, a leaching filtrate and solid calcium hydroxide; and dehydrating the sludge under the action of the dead weight of a filter bag, purifying and recovering salt in the leaching filtrate and a filtrate through an electrolytic cell, and changing the desalting filtrate into circulating water toleach the salinized sludge again. The obtained solid calcium hydroxide is collected, transported outwards and reused; the salinized sludge is used for landscaping, so the landscaping value of the sludge is effectively excavated; and zero emission of tail water is achieved.

Description

technical field [0001] The invention belongs to the technical field of salinization sludge treatment, and in particular relates to a treatment method for salinization sludge. Background technique [0002] At present, in the existing large-scale sewage treatment plants, the excess sludge obtained contains refractory organic matter. If no chemicals are added, the dehydration of the excess sludge with a filter press is not effective. Therefore, many large-scale sewage treatment plants A large amount of quicklime will be added in the process of pressure filtration to achieve disinfection and sterilization and enhance the effect of pressure filtration. [0003] The traditional treatment method for this kind of salinized sludge is the brick-making method of dried sludge. Dried sludge brick making is to dry the sludge (dry or dry it outdoors naturally), after grinding, mix it with other raw materials (such as clay), pressurize it, and bake it to make sludge bricks. However, in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F101/10C02F101/30
CPCC02F11/006C02F2101/10C02F2101/30
Inventor 吴旭李佳旭吴怀德
Owner 湖北华德莱节能减排科技有限公司
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