The garbage passes through three stages of drying, burning and combustion, and the garbage is fully combusted at a high temperature of 850-1000 degrees Celsius. Through the computerized automatic control system and automatic combustion control system can instantly monitor and adjust the combustion condition of the garbage in the furnace, timely adjust the grate running speed and combustion air volume, these means can ensure that the garbage disposal is always in a controllable state. In order to avoid the loss of heat energy from the high temperature flue gas produced during the incineration of garbage treatment, the heat from these incineration process of garbage treatment is exchanged in the waste heat boiler to produce superheated steam, which pushes the turbine generator set to produce electricity, which is in turn passed through the power grid and conveyed to various places, thus realizing the resourcefulness of the garbage treatment.
The flue gas generated in the incineration process, need to be processed through specialized equipment to be discharged, you can add lime, activated carbon and other substances on the flue gas adsorption, purification, usually referred to as exhaust gas purification is the flue gas treatment; garbage in the process of storage before treatment, but also seepage of sewage, this sewage should also be processed through advanced technology, biochemical, filtration and purification, etc. The waste water will be treated by advanced technology, biochemical, filtration and purification, etc., so that the treated sewage can be reused, and directly recycled for re-production of water. Waste incineration after the volume reduction rate is very high, the weight of the slag only accounted for 15% to 20% of the weight of the waste before incineration, very good realization of the waste disposal of the reduction.
2, the household garbage can burn? Can incinerate thoroughly?
With the continuous development of China's national economy, people's living standards continue to improve, the calorific value of daily life of garbage continues to improve, the current level of heat equivalent to ordinary coal 1/4, the specific data in the 1000 ~ 1200kCal/kg or so, can not add any combustion aids and burning, the domestic incineration boiler in the form of a layer of combustion grate are more mature! Now the domestic layer combustion grate form incineration boiler, are more mature, can completely incinerate domestic garbage, after incineration of residue similar to soil. In our country to enter the waste incineration power plant of the calorific value of the garbage have been completely higher than the combustion calorific value.
3, China's waste incineration status is how?
China is a developing country, rapid economic development in recent years, accelerated urbanization, residents' living standards continue to improve, resulting in an increase in the amount of urban waste, and about 4% per year to the rate of growth in garbage contamination of the environment, endangering the masses of the problem is still very prominent. At present, there are more landfills in China, but 57% of them have not passed the environmental impact assessment due to the reason of local capital investment; composting is also promoted in only a few places, but because of the waste classification is not carried out, so the difficulty of composting is also greater. Waste incineration has not been fully promoted due to the expensive treatment equipment. "Eleventh Five-Year" environmental protection planning requirements to reduce pollution as the core, the full implementation of engineering emission reduction, structural emission reduction, management of emission reduction measures, strengthen environmental access, effectively strengthen the prevention and control of water pollution in rivers, lakes and seas, and deepen the prevention and control of industrial pollution. Through three years of efforts to make the main pollutant emissions under control, so that the environmental protection infrastructure has been comprehensively strengthened, so that the environmental protection regulatory capacity significantly improved.
China's waste incineration power generation, although a late start, but rapid development. In 1988 Shenzhen to establish China's first introduction of Japan's Mitsubishi imported equipment and technology of the garbage power plant - Shenzhen Municipal Environmental Sanitation Comprehensive Treatment Plant daily treatment of garbage 3 × 150 tons, the installed capacity of 4MW. 2000 Zhuhai to establish the first domestically produced equipment-based garbage power plant - the Zhuhai garbage power plant (
Power plant in Zhuhai (the first domestic equipment-based garbage power plant). -Zhuhai garbage power plant (daily garbage treatment 3 × 200 tons, installed capacity of 6MW). Subsequently, Ningbo, Zhejiang, Hangzhou, Shanghai Pudong and Puxi, Shandong Heze, Guangdong Nanhai, Taiyuan, Shanxi, Chongqing, Changsha, Hunan, Tianjin, Guangzhou and many other cities of waste-to-energy power plants have been built, and now there are more than 140 waste-to-energy power plants in China (including completed, under construction and has been submitted for approval).
Waste as recyclable energy, China has been vigorously promoted. In the "Eleventh Five-Year Plan" clearly mentioned that the eastern region of the waste disposal planning layout incineration plant 56 (29%), the central region of the waste disposal planning layout incineration plant 9 (7%), the northeast region of the waste disposal planning layout incineration plant 7 (9%), the northwest region of the waste disposal planning layout incineration plant 4 (10%), the southwest region of the waste disposal planning layout incineration plant (10%), the southwest region of the waste disposal planning layout incineration plant (10%), the northwest region of the waste disposal planning layout incineration plant 4 (10%), the northwest region of the waste disposal planning layout incineration plant (10%). 10%), southwest region waste disposal planning layout incineration plant 6 (16%).
So, the original waste using landfill, composting treatment has been unable to fully meet the needs of the negative impact of composting on the soil is also larger, most of the landfill has also been in the imminent filling and have to re-select the landfill site, due to land scarcity and the environmental requirements, the development of waste-to-energy incineration technology in different cities according to the actual situation of waste harmless waste treatment becomes urgent.