Treatment method of electroplating sludge

A technology of electroplating sludge and treatment methods, which is applied in sludge treatment, fixed/solidified sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost and large energy consumption, and reduce waste and reduce Bulk volume, low cost effect

Inactive Publication Date: 2017-08-01
浙江工业大学温州科学技术研究院
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has the disadvantages of high cost and large energy consumption

Method used

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  • Treatment method of electroplating sludge

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preparation example Construction

[0023] combined with figure 1 , embodiment 1, the treatment method of a kind of electroplating sludge of the present invention, described preparation method comprises the steps:

[0024] (1) Dissolve polyvinyl alcohol particles in hot water at 95°C to obtain a PVA solution, and cool it naturally for use;

[0025] (2) Take the electroplating sludge and the mineral powder used as the solidified adsorbent, put them in a granulator for mixing and stirring, and at the same time spray an appropriate amount of the PVA aqueous solution prepared in step (1), and stir for 2-30 minutes to form composite electroplating sludge particles;

[0026] (3) Dry the composite electroplating sludge particles obtained in step (2) at 80-120° C. for 6-12 hours to obtain the electroplating sludge / mineral powder composite material.

[0027] A method for treating electroplating sludge, in step (1), the concentration of the PVA solution is 5-15wt.%.

[0028] A method for treating electroplating sludge. ...

Embodiment 2

[0035] Embodiment 2, a kind of treatment method of electroplating sludge, take by weighing 600g drying electroplating sludge and 400g bentonite mix, place in the granulator and stir, spray 400ml 5wt.% PVA aqueous solution simultaneously, open the granulator, make After granulation for 15 minutes, the bonded electroplating sludge composite particles were taken out and placed in an oven at 80°C for 6 hours to obtain composite electroplating sludge particles.

Embodiment 3

[0036] Example 3 A treatment method for electroplating sludge, weighing 600g of oven-dried electroplating sludge and mixing it with 300g of zeolite, placing it in a granulator for stirring, spraying 200ml of 8wt.% PVA aqueous solution at the same time, opening the granulator, and granulating The bonded electroplating sludge composite particles were taken out after 5 minutes and dried in an oven at 100°C for 12 hours to obtain composite electroplating sludge particles.

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Abstract

The invention provides a treatment method of electroplating sludge. The method comprises the following steps: (1) dissolving polyvinyl alcohol (PVA) particles into hot water at the temperature of 95 DEG C so as to prepare a PVA solution, and naturally cooling for later use; (2) taking the electroplating sludge and mineral powder used as a curing adsorbent, putting into a granulating machine, spraying a proper amount of the PVA solution prepared in the step (1) while mixing and stirring, and stirring for 2-30min to obtain composite electroplating sludge particles; (3) drying the composite electroplating sludge particles obtained in the step (2) for 6-12h at the temperature of 80-120 DEG C so as to obtain an electroplating sludge/ mineral powder composite material.

Description

technical field [0001] The invention relates to a treatment method of electroplating sludge. Background technique [0002] The electroplating industry is an important basic processing industry in my country and one of the three major polluting industries in the world today. During its electroplating production process, a large amount of solid waste, mainly electroplating sludge, will be generated. These solid wastes contain a large amount of chromium, iron, nickel, copper, zinc and other heavy metal compounds and their soluble salts, which are highly toxic, unstable, and easy to lose, and belong to the national hazardous waste ("National Hazardous Waste List" HW17, class HW21). About 10 million tons of electroplating wastewater sludge is produced in my country every year, which is the main solid waste in the electroplating industry. A large amount of electroplating sludge is piled up in the form of solid waste, which will not only occupy the land but also easily pollute t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F103/16
CPCC02F11/008C02F2103/16
Inventor 盛嘉伟张俭孙青严俊
Owner 浙江工业大学温州科学技术研究院
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