On the morning of November 12, a closed tank truck full of sludge was headed from the Momokowan Sewage Treatment Plant to the Domestic Waste Treatment Plant. Here, the sludge is dried and then incinerated along with other household waste for power generation, meeting ‘harmless’ disposal standards. At present, the daily processing capacity is about 300 tons, mainly from Momokowan Sewage Treatment Plant and Xin’an River Sewage Treatment Plant.
“The moisture content of the sludge when it enters the site is 82%. The moisture content of the sludge after drying is 40%, and the weight loss rate is 66.7%. The reporter received information from the Environmental Sanitation Center of the City and Urban Management Bureau that after the sludge was dried, , Its calorific value increases greatly, and then it is cut into particles with a mold, and it is proportionally mixed with household waste to generate a flue.The gas generated by incineration is It will be discharged after reaching the standard.Under the requirements of the national emission standard, the project will solidify the mixed combustion rate of dry sludge to 11%, and the mixed combustion rate in the same industry is only 7%, that is, 1000 tons per day. The waste incineration power plant with a processing capacity of 350 tons can jointly process 350 tons of domestic sludge.
After five years of research, sludge drying and household waste incineration technology has completely changed traditional sludge treatment methods. According to the staff, he has two ways to treat sludge in a conventional domestic sewage treatment plant. One is that the moisture content of the treated sludge should be less than 60%. This can be landfilled in a domestic waste landfill. Coal-fired power generators can also cooperate in sludge incineration. These two methods have strict requirements on land resource utilization and environmental pollution emissions.
In recent years, the state has announced a series of policies promoting waste incineration and sludge disposal. With the strong support of the city government, the city’s Environmental Sanitation Management Center and the company’s production engineers have conducted technical research and conducted numerous experiments on the joint treatment of dry sludge with domestic waste, relying on domestic waste incineration facilities. I am doing an analytical analysis.Through repeated trials of the incineration system, relevant processes and data, through comprehensive scientific research, grasp the relevant mechanism of waste incineration and joint treatment of dry sludge, and improve the environmental protection index and sludge mixing with serious negative impacts. Overcoming the difficulty of balancing the amount of combustion Sludge mixed combustion into the ash deposits of the waste incinerator, especially the granulation technology, said that the ash on the heating surface will affect the boiler’s 8000-hour operating time. can solve the problem perfectly
After more than 5 years of exploration, sludge drying technology is mature and stable. Successful research and development of sludge drying combined with domestic waste incineration technology solves the problem of soil and water pollution and surrounding environmental pollution caused by sludge landfill, jointly constructing and sharing domestic waste incineration technology and facilities, Together, we have realized “harmless, harmless”. Resourceful “reduction” disposal of waste and sludge while at the same time providing economic, social and environmental benefits to society. Recently, the Ministry of Ecology and Environment released the 2020 National Advanced Pollution Control Technology (Solid Waste and Soil Pollution Control) Catalog. This catalog introduces the sludge drying granulation and co-incineration technology with household waste declared by Yantai Lunda Garbage Treatment and Operating Company. , Ltd. was listed in the technical catalog and listed as a promotion business.