A process and device for continuous treatment of high-concentration organic wastewater

Abstract

This application discloses a process and device for continuous treatment of high-concentration organic wastewater. The process of this application is to continuously separate high-concentration organic wastewater through the synergy of multi-layer evaporators and heat pumps, and generate waste water steam containing light components. After the gaseous form is mixed with air, desulfurization and catalytic combustion are carried out continuously. After the treatment, the wastewater can be discharged up to the standard, and the heavy components of the wastewater produced can be recycled. After the desulfurization agent in the first desulfurizer and the catalyst in the first catalytic burner are deactivated, they can be switched to the second desulfurizer and the second catalytic burner to react, and the deactivated catalyst and desulfurizer can be passed into air at high temperature Regenerate in situ. The present invention combines multi-layer evaporation technology, heat pump technology, high-temperature desulfurization technology and catalytic combustion technology to realize the continuous treatment of wastewater, and solve the shortcomings of high-concentration organic wastewater treatment, such as large footprint and easy generation of nitrogen oxides, and the sulfur content of wastewater and chemical oxygen demand can reach the first-class discharge standard and the third-class discharge standard of industrial sewage respectively.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment, and in particular relates to a process and a device for continuously treating high-concentration organic waste water. Background technique [0002] With the rapid development of my country's economy and industrialization, more and more industrial wastewater is discharged into the natural environment, including some difficult-to-treat high-concentration organic wastewater. The chemical oxygen demand (COD) of these high-concentration organic wastewater is usually above 20,000 mg / L, and the COD of some wastewater can reach hundreds of thousands of mg / L, and its composition is complex, with strong chroma, strong odor, and serious environmental pollution. Therefore, the treatment of high-concentration organic wastewater has become an inevitable demand in today's society. [0003] Wastewater treatment processes mainly include physical treatment, biodegradation and chemical oxidatio...

AI Technical Summary

Problems solved by technology

The biological method is a method that uses the action of microorganisms to decompose organic matter into stable inorganic components. It has the characteristics of strong economy, high safety and less residue, but its treatment cycle is long, the amount of biological treatment is limited, and it occupies an area The area is large, and it is difficult to treat part of the industrial wastewater with higher concentration

Chemical oxidation is currently a widely used high-concentration organic wastewater treatment technology. There are two main treatment technologies currently used: one is the strong oxidant treatment method at room temperature. The cost of this technology mainly lies in the consumption of oxidant, which is basically It is directly proportional to the concentration of organic wastewater, and the cost of treating high-concentration organic wastewater is relatively high; another method is thermal incineration, which usually puts high-concentration organic wastewater into the incinerator for combustion. This method usually requires The high temperature is above 800 ºC, and some fuels need to be mixed for combustion. Flash explosion may occur during the incineration process, which is not conducive to wastewater treatment, and it is easy to produce nitrogen oxides and pollute the environment.

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