REVIEW: Garbage incineration is a high-energy-consuming technology route that low-energy technology route is not worth promoting?
Why not use more environmentally friendly technology
Mr. Zhang Yi, dean of Shanghai Environmental Hygiene Engineering Design Institute, said in his article "Ten Key Issues to Be Known in Domestic Waste Incineration" that the main features of waste incineration technology are the land use of the project, high processing speed, good capacity reduction effect and pollution discharge Low energy efficiency.
In fact, the first four are the results of the second generation of waste treatment technology (incineration) compared with the first generation of waste disposal technology (landfill). So, why not compare with the current more environmentally friendly, more resource-saving and more energy-efficient third-generation waste treatment technology? The world has now reached the third generation of waste treatment technology stage, emerged a variety of environment-friendly, resource utilization The higher the rate of waste treatment technology, there are biological treatment, mechanical sorting, anaerobic digestion, high pressure steam, as well as a combination of these technologies. These technologies are more environmentally friendly and can even use the entire Pq ring without residue.
The article said that every ton of garbage can be burned to generate electricity more than 300 degrees, about every five people living garbage generated by waste incineration power generation to meet one's daily electricity needs. Then, I would like to ask if I can announce how much electricity and water it will consume for this individual's electricity needs, how many people's daily electricity and water needs?
Shenzhen is building the world's largest waste incineration power plant "Eastern Green Power Plant" renderings
Ultrafine particles produced by incineration are difficult to monitor
Mr. Zhang Yi believes that "for a high standard incineration plant, efforts should be made to minimize pollution emissions."
We know that two VA elements are generated: chlorine, combustion, carbon, copper and other metal catalysis. Mixed garbage incineration complete the various elements, it reduces the high cost of pollutant emissions, difficult, and easily lead to secondary or even three pollution. Is it hard to get sick or sick, or avoid getting sick?
Mr. Zhang Yi also believes that "the waste incineration plant must also be equipped with bag filter to remove dust pollutants in incineration flue gas." We all know that incineration produces a lot of ultra-fine particles. At present, the most advanced environmental protection facilities have done nothing about it. At present, the most advanced monitoring system can not monitor it. How do we know that pollutants are effectively "removed"?
There are many kinds of poisonous substances not detected
As for the regulation of waste incineration plants, Mr. Zhang Yi believes that it must be "transparent operation." I agree with this. However, strict supervision can not be done without the support of manpower, financial resources and material resources. If rubbish can be handled in a people-friendly, environmentally-friendly manner, then the government's regulatory costs can be reduced accordingly.
Commenting on how the incineration plant controlled emissions, Mr. Zhang Yi suggested that "the furnace temperature is higher than 850 ℃ and the flue gas residence time is more than 2 seconds, so as to ensure the complete dissolution of the two VA and other organic substances." However, the flue gas from the incineration plant to the atmosphere into the atmosphere, there will be a cooling process. In fact, two VA in the flue gas will be reconstituted in the medium temperature range of 200 ° C to 500 ° C.
Mr. Zhang Yi also said to "ensure that the MSW incineration plant flue gas emissions meet the required standards."
Many people may not know that burning incineration produces more than 200 known toxic substances, but few are tested. For example, only two VAs were tested and no other potentially harmful POPs such as polycyclic aromatic hydrocarbons (PCBs) or polychlorinated biphenyls (PCBs) were detected.
Again, the discharge does not equal to non-compliance emissions. The pollutants in the flue gas are discharged to the atmosphere, and eventually they will settle and enrich in the water, soil and endanger the environment. Environmental management, with environmental quality as the core, places more emphasis on pollutant emissions than emission standards.
Waste incineration emits high levels of greenhouse gases, burning up to 1.9 tons of carbon dioxide emitted from 1 tonne of rubbish. In the efficiency ranking of waste treatment technologies, incineration efficiency is not high, ranking only 19th in the efficiency ranking of 24 waste treatment technologies. Its efficiency is 228% lower than the number one bioprocessing technology and 211% lower than the number two plasma-vaporization-high-pressure technology.
It is better to stop the malodor at the source rather than waste it in the waste incineration plant to control the emissions of malodors. Garbage in domestic waste is the source of malodors. Collecting food waste separately and separately for transport and disposal is the most effective way to control the emission of malodors.
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