Sludge drying method to which radio frequency electromagnetic energy is applied

Abstract

The invention discloses a sludge drying method to which radio frequency electromagnetic energy is applied. The sludge drying method includes the following steps that 1, to-be-treated sludge is stirred, blocky solids are decomposed, and solids and liquid of the sludge are fully mixed to achieve a uniform conditioning scattered state; 2, the sludge treated in the step 1 is guided into an electromagnetic field which is changed at a high speed for a heating reaction; 3, the sludge treated in the step 2 is continuously heated in the electromagnetic field which is changed at the high speed, and the temperature is kept between 260 DEG C and 280 DEG C; 4, the sludge treated in the step 3 is continuously cooled in the electromagnetic field which is changed at the high speed. According to the sludge drying method to which radio frequency electromagnetic energy is applied, and resource comprehensive efficiency wealth benefits can be created for enterprises from the aspects of the disposal method for the sludge, process quantification, environment friendliness and energy conservation achieved in industrial application and reducing and harmless environment-friendly use.

Description

technical field [0001] The invention relates to a sludge drying method using radio frequency electromagnetic energy. It is not only suitable for the disposal of most industrial sludge, but also suitable for dehydration, drying, volume reduction and recycling of urban sewage sludge. Background technique [0002] Previously, the traditional sludge treatment process used coal-fired furnace hot air or boiler high-temperature steam as the main drying heat source process. For decades, we have relied too much on foreign incineration and landfill methods after the industrial revolution of the last century; not only the investment is large, the operating cost is high, but also time-consuming and labor-intensive; in addition to high energy consumption, traditional incineration also needs to first solve sludge dehydration After the water content is still as high as 75%-85%, it must be dehydrated to the condition that it can be put into the furnace before incineration; and the landfill ...

AI Technical Summary

Problems solved by technology

For decades, we have relied too much on foreign incineration and landfill methods after the industrial revolution of the last century; not only the investment is large, the operating cost is high, but also time-consuming and labor-intensive; in addition to high energy consumption, traditional incineration also needs to first solve sludge dehydration After the water content is still as high as 75%-85%, it must be dehydrated to the condition that it can be put into the furnace before incineration; and the landfill method will inevitably occupy a large amount of land due to the complex chemical and physical components of the sludge itself, which is extremely harmful to the ecological environment. Produce secondary pollution; traditional resistance heating (electric furnace wire heating, electric heating coil heating, electric heating tube heating) can save energy by 30%, but the old-fashioned resistance heating method heats while heating, resulting in low thermal efficiency and expensive heating. Electricity; in the past ten years in my country, colleges, universities, scientific research institutes and business colleagues have done a lot of research on sludge dewatering devices and process methods in the laboratory, but there are few industrial-scale applications; for a long time, sludge has become a problem that has plagued the development of enterprises big problem