The first question: How to treat the fly ash produced by garbage incineration?
Cement+water+chelating agent+fly ash are chelated to make it meet the landfill standard of GB- 16889, and then it is safely landfilled.
Advantages: high cost performance and low risk.
Cement kiln collaborative treatment
So that that content of fly ash is less than 30% of cement raw material.
Advantages: large processing capacity; Disadvantages: it affects the quality of cement and the flue gas can't meet the standard. ? Chlorine is the biggest obstacle to co-processing in cement kilns. Technical advantages such as bypass ventilation cannot solve the problem of flue gas reaching the standard, and tail gas such as dioxin cannot meet the standard.
Melting, plasma technology, etc.
Due to the consideration of power consumption and security, this technology cannot be popularized. Can be use for treating hazardous waste and instrument waste.
Advantages: Safe? Disadvantages: the cost is too high.
To sum up, chelating agent is the most effective method to treat fly ash at present, and it is also the most widely used manufacturer in China.
Second question: How many good brands of chelating agents are used to treat fly ash?
In fact, Baidu can tell you a lot about this problem. As a practitioner engaged in chelating agents for many years, I will give you a pertinent answer.
Lianyungang Xinjiang environmental protection? (I'm in the company)
Kurita (Dalian) Industry (Japanese enterprise, domestic production)
Dongcaoda, Japan (all imported)
Tianjin Yi Ming (an early enterprise engaged in chelating agent)
Nantong hailier? (The manufacturer who is the least willing to write)
Shanghai Baosteel gas (backed by big trees to enjoy the cool)
Some don't write, but the above are all big names that are active in bidding websites. ? There is no difference between good and bad products, and the products are only known when the owners have used them. But what is certain is that they are all manufacturers.
The third question? Are there any outsourcing enterprises?
As a hazardous waste, the definition of fly ash itself is somewhat vague. However, many enterprises require qualified manufacturers to deal with hazardous wastes. But now this qualification has been cancelled. Our factory was originally qualified to apply for processing, but the required site was given by the project company. ? For example, a waste incineration power plant needs to treat fly ash and invite public bidding to treat enterprises, but enterprises need to apply for treatment qualification with the help of fly ash solidification workshop of a factory, which leads to problems. ?
The interpretation of environmental protection varies from place to place. I consulted the Ministry of Housing and Urban-Rural Development in several provinces and gave different answers. But two things are certain: first, the main body of environmental protection will not be the edge, but the garbage incineration power plant. The second point: the fly ash shipped from the factory must meet the landfill standard. These two points are the key. ? Our company is also running fly ash operations in several power plants, and there is no need for rigid qualification requirements for environmental protection. ? The only thing that must be done is:
Transfer fly ash must meet landfill standards;
Long-distance transport vehicles must have the qualification of hazardous waste transport.
I hope my pertinent answer can solve the problem for you. Please contact me if you are not suitable for other manufacturers. Thank you! ? Are you happy at home? Welcome owners and peers to communicate with each other.