Method and device for anti-freezing and heat preservation of alkali-adding pipelines in plateau wastewater treatment systems

Abstract

The invention discloses a method for realizing anti-freezing heat insulation for an alkalifying pipeline of a plateau wastewater treatment system. According to the method, a steam heat-tracing pipeline is led out from a steam waste heat main pipe, the steam heat-tracing pipeline is next to the outer wall of the alkalifying pipeline, and the steam heat-tracing pipeline and the alkalifying pipeline are bundled together; and heat is transferred to an alkaline liquid through steam waste heat transfer during a process of pumping the alkaline liquid to an aerobic tank, and microbes in the wastewater treatment system cannot be killed due to the temperature of the alkaline liquid, so that the anti-freezing heat insulation for the alkalifying pipeline of the plateau wastewater treatment system is realized. The invention further discloses a device for realizing the abovementioned method. The method and the device which are disclosed by the invention realize recycling for steam waste heat and realize anti-freezing heat insulation for the alkalifying pipeline of the plateau wastewater treatment system in winter, and have the advantages of being low in investment cost, capable of saving energy utilization, good in heat insulation effect, stable in running effect and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a winter antifreeze and heat preservation method and a device thereof for an alkali-adding pipeline of a plateau wastewater treatment system. Background technique [0002] In cold and severe cold regions, the external ambient temperature in winter is much lower than 0 ℃, and the pipeline must be kept warm during transmission. The winter in plateau areas is particularly important. For example, in the sewage treatment plant in Golmud Qarhan area of ​​Qinghai, the annual average temperature is 5.9°C, the minimum temperature is -29.7°C, and the temperature difference between day and night is as high as 20°C. How to add alkali to the wastewater biochemical denitrification system Antifreeze and thermal insulation of pipelines is one of the important problems to be solved in sewage treatment in plateau areas. [0003] When the soda ash solution flows in the pipeline...

AI Technical Summary

Problems solved by technology

The disadvantage is that the constant temperature is low, which cannot meet the heat tracing requirements of higher temperatures; the heat tracing is easy to age, and the service life is short; the use cost is high, and the heating speed is relatively slow

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