A method and equipment for treating melamine wastewater by ultrafiltration membrane

A technology of melamine and ultrafiltration membranes, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as environmental pollution and waste of resources, and achieve high atom economy, Resource saving and large processing capacity

Inactive Publication Date: 2011-12-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of melamine production, the circulation system produces process wastewater. Because the process wastewater contains melamine and its hydrolyzed product OAT, in order to ensure the quality of the product, OAT must be removed. At present, some plate and frame filter production equipment is used to remove OAT. This method is used in the production process. A large amount of solid waste will be produced, and the disposal of solid waste is landfill, which wastes resources and pollutes the environment
There is no relevant literature report on the treatment of melamine wastewater by ultrafiltration membrane

Method used

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  • A method and equipment for treating melamine wastewater by ultrafiltration membrane
  • A method and equipment for treating melamine wastewater by ultrafiltration membrane
  • A method and equipment for treating melamine wastewater by ultrafiltration membrane

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Embodiment Construction

[0019] combined with figure 1 and attached figure 2 , the working process of the method and equipment of ultrafiltration membrane processing melamine waste water of the present invention is described in detail:

[0020] The ultrafiltration equipment used in the present invention consists of an ultrafiltration membrane system, a feed pump, a circulation pump, a prefilter, valves and connecting pipelines. The ultrafiltration system is composed of three ultrafiltration membrane filters (6), (9) and (12) connected in series, and each ultrafiltration membrane filter is composed of a casing (32) and parallel module blocks (30). The module block (30) is composed of a membrane substrate and an ultrafiltration membrane. The membrane matrix is ​​composed of α-Al with macroporous structure 2 o 3 It consists of several parallel channels; the ultrafiltration membrane is composed of one or more layers of zirconium and titanium metal oxides, and the ultrafiltration membrane covers the ...

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Abstract

The invention relates to a method and equipment for treating tripolycyanamide waste water by using ultrafiltration membranes and belongs to the field of waste water treatment. In the invention, waste water from tripolycyanamide production is treated by using the ultrafiltration membranes, an ultrafiltration system consists of three ultrafiltration membrane modules which are connected in series, each ultrafiltration membrane module has three sets of parallelly working ultrafiltration membrane equipment, ornithine aminotransferase (OAT) pulp enters the three ultrafiltration membrane modules in turn, and the ultrafiltration membranes divide the OAT pulp into concentrated OAT pulp, resident fluid and pure tripolycyanamide and penetrating fluid. The resident fluid enters a resident fluid tank from the third ultrafiltration membrane module and is subjected to high-temperature and high-pressure treatment; and the OAT and tripolycyanamide are decomposed into ammonia and carbon dioxide, which are recovered and reduced. The penetrating fluid is discharged from each set of ultrafiltration membrane equipment and recycled as process circulating water, and thus, the zero waste discharge of a tripolycyanamide device is realized. The production of waste slag in a tripolycyanamide production process is avoided, the process is environment-friendly, the process atom economy is high, limited resources are saved, and energy consumption and cost are reduced.

Description

technical field [0001] The invention relates to a method and equipment for treating melamine wastewater, belonging to the field of wastewater treatment, in particular to a method and equipment for treating melamine production wastewater by using an ultrafiltration membrane equipment. Background technique [0002] At present, the domestic melamine high-pressure method production equipment basically adopts the Italian ETEC technology, which adopts the co-production mode with the urea equipment. In the process of melamine production, the circulation system produces process wastewater. Because the process wastewater contains melamine and its hydrolyzed product OAT, in order to ensure the quality of the product, OAT must be removed. At present, some plate and frame filter production equipment is used to remove OAT. This method is used in the production process. A large amount of solid waste will be produced, and landfill is used for solid waste disposal, which not only wastes re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/44
Inventor 任保增李涛宋怀俊刘振峰董妍妍李伟然李玉
Owner ZHENGZHOU UNIV
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