With the increasing pressure of municipal solid waste production, garbage classification has risen to the height of national strategy. The Ministry of Housing and Urban-Rural Development and other departments have promulgated a number of policies and plans, including the Implementation Plan for the Household Garbage Classification System and the Notice on Comprehensively Carrying out Household Garbage Classification in Cities at the Prefecture-level and above nationwide. Garbage classification has become a new national policy. In order to achieve the management goal of reducing, recycling and harmless household waste, all provinces and cities have issued household waste management regulations, established household waste classification management systems, and strengthened the fine management of garbage classification.
At present, there are three ways of harmless treatment of domestic garbage: sanitary landfill, garbage composting and garbage incineration. Compared with sanitary landfill, composting and other harmless treatment methods, waste incineration has the advantages of high treatment efficiency, good volume reduction effect, resource recycling and utilization, and relatively small impact on the environment. Under the strong support of national policies, waste incineration has become the mainstream way of waste treatment industry.
As the domestic waste classification system is gradually implemented in the whole country, it will lead to significant changes in the waste raw materials used for incineration power generation. What impact this change will bring to the waste incineration power plant is the current industry is very concerned.
After garbage classification, garbage sent to waste incineration power plant has higher calorific value, and thermal efficiency is further improved. First of all, the "dry wet depart" will be wet garbage from the original into the garbage incineration power plant dry wet mixing living garbage separation and can reduce the waste in the moisture content at the same time improve the calorific value of garbage into, by raising the tons of garbage power generation, the more thoroughly wet garbage separation, tons of garbage power generation ascension will be more significant, this also means that the ascent of the tons of garbage creation value; Secondly, the separation of wet garbage will also reduce the amount of garbage entering and entering the furnace to a certain extent, that is, the total amount of garbage creating value presents a downward trend.
Are put forward in the industry, not easy to assess the effect of garbage classification for incineration power plant, but after classification finer, has the corresponding adjustment on the incinerators operating, living garbage incineration power generation process shortened, calorific value significantly increased, the capacity to ascend, investment and operating cost reduction, MSW incineration power generation project overall economic efficiency significantly increased, The overall effect is positive.
Zhang Yi, an expert from the Ministry of Housing and Urban-Rural Development, also believes that waste classification has many impacts on the operation and management of terminal treatment facilities. If properly handled, it will do more good than harm. Taking the waste incineration power plant in Shanghai as an example, the main influencing factors include: 1. As the calorific value of other garbage (dry garbage) after classification will increase by about 30%, and the power generation capacity of tons of garbage will increase by about 25%; 2. If the heat load remains unchanged, the incineration capacity will be reduced by about 20%; 3. Due to the reduction of water content, the leachate production rate will be reduced by about 30%; 4. Some projects will face the contradiction of insufficient garbage disposal capacity in the short term.
To sum up, in order to adapt to the change of physical and chemical properties of waste incineration after classification, waste incineration power generation enterprises need to adjust accordingly, so as to significantly increase the power generation capacity of tons of waste and significantly improve the economic benefits of the project.
Wuhan Xinshengneng is a professional power testing equipment manufacturer. We pay close attention to the development and trends of power grid related industries. For more information, visit our official website: www.whxsn.com
