Drying Technology
Keywords: sludgedewateringmachine、 wasteheatsludgedryer
There are many kinds of sludge, mainly including industrial enterprises of sludge, such as electroplating sludge, printing and dyeing sludge, sludge and so on. River, waterworks sludge, sludge, etc. Municipal sludge (also known as sewage treatment plant sludge) is the development and long-term stability of urban sewage treatment, which produces a large amount of sludge, and due to its unique physical and chemical properties, such as improper disposal, environmental damage is very serious.
In fact, sludge drying is to use the process of evaporation and diffusion to remove water. Its process is still continuous, basically reflecting the drying principle, but most of the sludge is hydrated with water and water, evaporation and diffusivity are the properties that affect the sludge, and should be based on the required equipment structure, characteristics and sewage. Mud drying.
The high-efficiency urban sludge drying technology at room temperature can be said to have many advantages, which can conform to the current environmental protection concept advocated by people, and can also conform to the current domestic environmental protection development. In countries or regions with high population density, use clean and efficient sludge treatment technology to meet the requirements of environmental protection standards.
This technology can reduce the utilization of land resources and conform to the development of the times. The complete set of equipment has a compact structure and a small footprint. The unique modular design can ensure the convenience of construction projects. It is very suitable for today's society and the rapid growth of urban population. Improving the utilization rate of urban land resources is a positive practice of the renewable energy utilization technology advocated by the whole society.
The main working principle of sludge drying technology uses thermo-physical correlation to discharge sludge moisture, so as to achieve the purpose of drying sludge. After the sludge is dried, it usually shows powder and granular forms. . The energy of sludge drying technology
It is the form of net expenditure, and the energy consumed in the drying process is one of the very important indicators to evaluate the quality of drying technology.
Traditional sludge drying plant
This sludge drying method is a special drying field, which can use natural ventilation and gravity to collect outdoor construction sludge for sludge drying. However, such a drying method is limited by the use time, and the efficiency is relatively low, and it is easily affected by the external natural environment, resulting in an unsatisfactory drying treatment effect.
Sludge biological drying technology
Biological sludge drying technology refers to a new type of sludge drying technology, which uses biomass in the high-temperature aerobic fermentation process of microbial degradation of organic matter, and some control measures, through the form of forced ventilation, to tell the moisture content of sludge. Carry out full evaporation and treatment process to achieve rapid drying. Biological sludge drying technology does not need to provide additional heat sources and the energy required for the drying process belongs to biomass, aerobic fermentation microbial activities, in line with my country's economic and energy-saving production goals, and can also be artificially controlled to shorten the drying time. To shorten, so as to improve the drying efficiency. However, due to the high cost, it has not been widely promoted and applied in China.
Sludge thermal drying technology
Sludge thermal drying technology is currently the most important sludge drying technology. Its main working principle is to dry the sludge by adding a heat source and evaporating water in the sludge. The sludge drying technology occupies a small area, and the use effect of the product is obviously reduced. Secondly, sludge thermal drying technology can also be divided into many different types of drying technologies according to heat transfer methods, equipment and drying equipment, etc. The actual ingredients of technology. However, there are still many problems during practical use. For example, the technology is more expensive to purchase equipment and, therefore, has higher operating costs during the application period.
In general, as sludge drying, it is a process of net energy consumption, so it is very necessary to explore energy consumption during drying. Sludge drying is currently domestic and foreign thermal drying, although the heat source has been optimized, the process
The steps have been simplified, and the relevant operating parameters have been optimized, such as the method of reducing energy consumption. However, due to the technical defects of the use process itself, coupled with the heat source, the energy consumption of thermal drying will not be determined.
