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System and process for treating water-based ink of printing plant to surface water discharge

A water-based ink and surface water technology, applied in filtration treatment, sedimentation treatment, multi-stage water treatment, etc., can solve the problems of secondary pollution, poor biodegradability, and high cost of wastewater treatment, and achieve stable equipment operation, simple system, and easy treatment. Efficient effect

Inactive Publication Date: 2020-07-17
埃尔博工业设备(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the COD and chroma of water-based ink wastewater are generally very high, and the biodegradability is poor, the method of directly adding water to dilute, even if diluted dozens of times or even hundreds of times or thousands of times, the chroma and COD of the wastewater are also very difficult. Meet the emission standards, but at the same time increase the amount of waste water discharge, the difficulty of treatment and the cost of treatment. The method of incineration, foreign transportation and deep burial also makes the cost of waste water treatment very high, which is easy to cause secondary pollution

Method used

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  • System and process for treating water-based ink of printing plant to surface water discharge

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Embodiment 1

[0029] Such as figure 1 As shown, a system for treating water-based ink discharged from a printing factory to surface water in this embodiment includes a flocculation reaction tank connected in sequence, a filter press, an electroflocculation device, a filter device, an electrocatalytic device and RO reverse osmosis device.

[0030] Among them, the reaction devices are connected by pumps, and the sewage from the previous treatment process is pumped into the next treatment process. A stirring device is fixedly installed in the flocculation reaction tank. In the present invention, the water-based ink sewage is pumped into the flocculation reaction tank. In the reaction tank, a flocculant is added to the reaction tank to carry out flocculation reaction. After fully stirring and standing still, flocculation reaction occurs to separate solid and liquid.

[0031] The anode in the described electrocoagulation device is aluminum metal, and the cathode is aluminum metal. In this embod...

Embodiment 2

[0033] A process of using the system in this embodiment to treat the discharge of water-based ink to surface water in printing plants, the process is as follows: pump the water-based ink sewage into the flocculation reaction tank, and pump the sewage after the flocculation reaction into the filter press Pressure filtration is carried out in the machine, and the sewage after pressure filtration is pumped into the electroflocculation device for electrocoagulation treatment, the sewage after electrocoagulation is pumped into the filter device, the filtered sewage is then pumped into the electrocatalysis device, and the treated sewage is pumped into RO reverse osmosis device, the clean water after reverse osmosis treatment is discharged or recycled.

[0034] This embodiment takes the treatment of 1 ton of water-based ink sewage as an example to explain. The water-based ink sewage is pumped into the flocculation reaction tank, and 4000g of flocculant is added to the reaction tank to...

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Abstract

The invention relates to a system and a process for treating water-based ink of printing plant to surface water discharge. The system comprises a flocculation reaction tank, a filter press, an electric flocculation device, a filtering device, an electro-catalysis device and an RO (reverse osmosis) device which are connected in sequence. The system is simple, automatic / manual control can be achieved, and stable and reliable operation of equipment is ensured. According to the process, environmental pollution cannot be caused, no chemical reagent is added in the treatment process, no secondary pollution is generated, the treatment efficiency is high, the COD of the water-based ink sewage treated through the process is smaller than or equal to 10 mg / L, and the water-based ink sewage can completely meet the surface water discharge standard.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a system and a process for treating water-based ink discharged from a printing factory to surface water. Background technique [0002] Water-based ink has good coloring ability and is not easy to fade. It is widely used in the field of printing and coating. Highly polluting liquids. At present, the domestic carton packaging industry generally uses water-based ink printing technology. During the production process, it is necessary to replace the ink and clean the printing equipment, so a certain amount of ink wastewater will be generated. Since the COD and chroma of water-based ink wastewater are generally very high, and the biodegradability is poor, the method of directly adding water to dilute, even if diluted dozens of times or even hundreds of times or thousands of times, the chroma and COD of the wastewater are also very difficult. To meet the emission ...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/001C02F1/441C02F1/46109C02F1/463C02F1/4672C02F1/5236C02F1/5281C02F9/00C02F2001/007C02F2001/46142C02F2209/08C02F2209/10C02F2209/14C02F2301/08
Inventor 宋常红
Owner 埃尔博工业设备(北京)有限公司
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