High-grade oxidization deep processing system of printing and dyeing wastewater C.E
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A technology for advanced oxidation and printing and dyeing wastewater, applied in the direction of oxidized water/sewage treatment, multi-stage water/sewage treatment, water/sewage treatment, etc. The effect of improving product utilization, simple overall structure, and reducing processing costs
Pending Publication Date: 2019-07-30
SHANGHAI OCEAN UNIV
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Among them, the equipment investment of the corona method is high, the operating cost is high, and the ozone output is large, but the ozone concentration produced is low; the low ultraviolet method consumes high energy, and the concentration of generated ozone is low, which is not suitable for the production of a large amount of ozone; The radiation method has a large investment, is unsafe, and has a low frequency of use; the electrolysis method mainly includes electrolysis of air and electrolysis of pure water, and the process of electrolysis of air to produce ozone will produce NO X and other toxic substances, the required AC voltage is high, the electrolysis efficiency is low, it is difficult for ozone to enter the water, the equipment occupies a large area, and the use cost is extremely high; the ozone efficiency produced by the electrolysis pure water unit is the highest, but the equipment investment is high and the ozone output is small. cannot be applied on a large scale
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Embodiment 1
[0035] Example 1: Gas production and oxidant production test of the electrode group in the C.E electrolyzer
[0036] Test conditions: temperature 25°C, water sample configuration is distilled water + sulfuric acid, water sample volume is 2.5L, water sample TDS is 300mg / L, the results are shown in Table 1-3.
[0037] Table 1: 10×10cm electrode unit current, voltage and air flow
[0038]
[0039]Table 2: Oxidant output under different constant currents of 10×10cm electrode unit
[0040] Constant voltage V Reference current / A Oxidant production mg / cm 2 min
[0048] Example 2: Energy consumption and cost analysis of the C.E electrolyzer in the existing ozone generator and the C.E advanced oxidation advanced treatment system of the printing and dyeing wastewater of the present invention
[0049] Refer to the technical parameters of the domestic well-known brand KCF-DT10.0 ozone generator for analysis. The ozone output of this model is 10kg / h, the installed power is 110kW, and the operating power is about 110×0.85=93.5kW, because the ozone generator The temperature will rise during operation, so the cooling device must be considered. According to the cooling method of the chiller, the ozone generator with an ozone output of 10kg needs to consider the cooling capacity of 100kW. Refer to the parameters of the air-cooled screw chiller. The installed power of the chiller is about It is 41.3kW, and the operating power is about 41.3×0.85=35.1kW. In addition, supporting nitrogen dosing devices, tail gas treatment devices, etc. are required,...
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Abstract
The invention discloses a high-grade oxidization deep processing system of printing and dyeing wastewater C.E. The high-grade oxidization deep processing system comprises a raw water tank, a quartz sand filter, a C.E pre-electrolysis tank, a C.E electrolysis tank, a middle water tank and an active carbon filter which are sequentially communicated through a plurality of water inlet and outlet pipelines. The low-inlet and high-outlet mode is adopted for the water inlets and outlets of the C.E pre-electrolysis tank and the C.E electrolysis tank, and the tops of the C.E pre-electrolysis tank and the C.E electrolysis tank are both connected with the bottom of an active carbon adsorber; the C.E electrolysis tank comprises a plurality of electrode assemblies placed in electrode insertion groovesand an electrode assembly support, the electrode insertion grooves are evenly distributed in the electrode assembly support, each electrode assembly is an interlayer structure assembly composed of twonegative electrode plates, a built-in positive electrode plate, a plurality of screws, nuts and gaskets, and a plurality of flow guide holes are evenly distributed in the negative electrode plate andthe anode electrode plate. From the aspect of low energy consumption and low material consumption, the deep processing cost for making printing and dyeing wastewater reach the emission standard is reduced, meanwhile the recycling requirement is met, and energy conservation, emission reduction and recycling are realized.
Description
technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, in particular to a C.E advanced oxidation advanced treatment system for printing and dyeing wastewater. Background technique [0002] The printing and dyeing industry is a typical water-intensive industry, which consumes nearly 100 million tons of demineralized water for process every year. The sources of printing and dyeing wastewater and the composition of pollutants are complex, with the characteristics of large changes in water quality, high content of organic matter, and high chroma (mainly colored dyes). Direct discharge will bring great harm to human health and living environment, and cause waste of water resources. [0003] At present, the advanced ozone oxidation treatment technology is a common technology for the advanced treatment of printing and dyeing wastewater. The core equipment used in this technology is an ozone generator. The ozone generator nee...
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