On the example of a pharmaceutical plant, what type of electric heating is suitable for industrial wastewater pipelines.

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2023-02-08 13:47

Power plants, chemical plants, pharmaceutical plants and other enterprises will be equipped with special pipelines for wastewater treatment, however, the temperature is low in winter, especially in the northern regions, where the minimum winter temperature can be lower than-20 ° C. The pipelines are easily blocked by freezing, which affects production. Take the sewer pipe of a pharmaceutical plant as an example to see the thermal insulation and antifreeze effect of electric heating cables in sewer pipelines.

With the development of the pharmaceutical industry, pharmaceutical wastewater has gradually become one of the important sources of pollution. Due to the complex composition of pharmaceutical wastewater, high organic content, high toxicity, saturated color and high salt content, especially poor biochemical properties and intermittent pollution. Discharge, difficult to cope. How to make wastewater pipes meet reasonable discharge standards, some wastewater pipes require a certain temperature to decompose organic matter. The pharmaceutical industry's wastewater mainly includes antibiotic wastewater, traditional Chinese medicine waste water, and chemical pharmaceutical waste water. For example, the total amount of decomposed enzyme substances increases fastest to 40 ° C, and the hyperactivity is strongest, and the total amount of decomposed substances reaches a maximum of about 50 ° C. Therefore, the above requirements require maintaining the temperature of the pipeline at 40-50 ° C. In addition, the main reason is that the wastewater pipes are susceptible to clogging due to cold weather. In addition, the process route of the wastewater pipeline is long, and the treatment cost itself is relatively high. How to obtain antifreeze at the lowest cost and meet the antifreeze needs in main pipelines is a problem that needs to be considered at this time.

At present, it is generally recommended to use self-limiting temperature electric heating cables and series electric heating cables for freezing protection of pipeline equipment. If there are many flanges on the pipeline, and the distance is small, you can consider using a self-regulating electric heating belt. Electric heating cable with self-control temperature, it can be automatically adjusted according to the ambient temperature, so that the pipe temperature can be maintained above 0 ℃.

If the pipeline distance is relatively large, you can consider the serial constant power electric heating belt. Unlike a self-regulating electric heating cable, which can be cut automatically, it can do overlay winding. The very high power heating tape of the serial type cannot be cut at will, and also cannot be applied and wound. And the series electric heating belt should also interact with the thermostat for precise temperature adjustment.

In summing up, it can be said that the best method of heating using antifreeze for waste water treatment by chemical and pharmaceutical enterprises is electric heating. Compared with other antifreeze methods, it has the advantages of energy saving, environmental protection, and low installation and use costs.

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