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New process for comprehensively utilizing brown alga chemical calcium wastewater

A technology of chemical industry and brown algae, which is applied in the field of new comprehensive utilization process of brown algae chemical waste calcium water, can solve the problems of plate scrapping, reducing the efficiency of electrodialysis desalination, etc., and achieve the effect of reducing treatment costs, reducing production costs, and improving resource utilization.

Active Publication Date: 2013-04-24
北海南方海洋科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The residual calcium content in waste calcium water can reach 350-700ppm. Excessive calcium content will lead to scaling under the action of concentration polarization during the long-term operation of electrodialysis, reduce the desalination efficiency of electrodialysis, and even cause the plate to be invalid.

Method used

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Effect test

Embodiment 1

[0020] Embodiment 1: This embodiment proposes a novel comprehensive utilization process of brown algae chemical waste calcium water, which includes the following steps:

[0021] (1) The production workshop takes 5L of waste calcium water, which contains 550ppm of calcium and has a conductivity of 11.4ms / cm2. The production workshop takes 5L of diluted clear glue solution with a conductivity of 2.3 ms / cm 2 . Add the dilute clear glue solution into the waste calcium water under the action of mechanical stirring, make it mix evenly, and let it stand for stratification;

[0022] (2) After standing and stratifying, the lower part of the supernatant was sucked out with a latex tube, a total of 4.8L, a calcium content of 270ppm, and a conductivity of 5.8ms / cm 2 , after filtration, enter the subsequent electrodialysis unit for treatment; the upper glue solution continues to add CaCl 2 100g, made into CaCl with a mass volume fraction of 10% 2 The solution was added under the action ...

Embodiment 2

[0026] Embodiment 2: This embodiment proposes a novel comprehensive utilization process of brown algae chemical waste calcium water, including the following steps:

[0027] (1) The production workshop takes 60L of waste calcium water, in which the calcium content is 450ppm and the conductivity is 7.0ms / cm 2 , the production workshop takes 20L of diluted clear glue solution, the conductivity is 2.1 ms / cm 2 . Put the waste calcium water in an air-dissolving tank with a pressure of 0.4MPa. After the air-dissolving is completed, mix it with the diluted glue solution in the pipeline mixer according to the volume ratio of 3:1, and let it stand for stratification;

[0028] (2) After standing and stratifying, the lower clear liquid is discharged, a total of 58L, with a calcium content of 380ppm and a conductivity of 5.5ms / cm 2 , enter the subsequent electrodialysis unit for processing; the upper glue solution continues to add CaCl 2 420g, made into CaCl with a mass volume fraction ...

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PUM

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Abstract

The invention provides a new process for comprehensively utilizing brown alga chemical calcium wastewater. The process is the comprehensive utilization process established based on brown alga chemical calcium wastewater recycling which uses an electrodialysis desalination technology as a core. Two new comprehensive utilization technologies of the calcium wastewater, namely a two-time calcification pretreatment technology and a calcium wastewater electrodialysis concentration utilization technology, are provided to realize economically comprehensive utilization of the brown alga chemical calcium wastewater. By adopting the process provided by the invention, two new comprehensive utilization technologies of the calcium wastewater are further developed based on the calcium wastewater electrodialysis desalination technology, the utilization value of the calcium wastewater is improved, the treatment cost of the calcium wastewater is reduced, and the economical recycling of the calcium wastewater is really achieved.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and chemical industry, and in particular relates to a novel comprehensive utilization process of brown algae chemical waste calcium water. Background technique [0002] The huge water consumption of the brown algae chemical industry has become the bottleneck of its development. The cost of the existing wastewater treatment methods is too high to achieve the economic reuse of production wastewater, which makes the enterprise lose the motivation for reform. This is the direct cause of the industry's inability to reduce water consumption. Therefore, the low-cost waste calcium water recycling process is the only way to realize water saving and emission reduction in brown algae chemical industry. The way to reduce the reuse cost of waste calcium water is to adopt new technology to reduce its treatment cost, further develop the utilization value of waste calcium water, realize the comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
Inventor 苗钧魁冷凯良殷邦忠李晓川贾福强孙伟红邢丽红闫绍鹏许洋
Owner 北海南方海洋科技开发有限公司