Is zero emissions in coal chemical industry feasible?
Thread Content
Let’s discuss how the concentrated water from reverse osmosis processes is handled in various factories. So far, all I’ve heard of are multi-effect evaporation and the use of evaporation ponds, but the costs associated with these methods are unacceptably high. Are there any examples of zero-emission systems in the coal chemical industry in China?
Coal chemical industries cannot achieve true zero emissions either, but they can meet regulatory emission standards through water treatment systems.
The coal chemical industry is a high-energy-consuming and highly polluting sector, and it is impossible to achieve zero emissions in it. Wastewater can be treated through a wastewater treatment system to meet regulatory standards before being discharged or partially reused ； Even after waste gas treatment, there must still be an environmental capacity, and all waste residues can be recycled.
Wastewater that has undergone biochemical treatment may meet the discharge standards, but I’m referring to the concentrated water from reverse osmosis processes – its chloride concentration can be as high as 6000 mg/L. Since China’s wastewater discharge standards do not specify limits for chloride levels, some manufacturers discharge such water directly. However, in the grasslands of Inner Mongolia, it’s unclear what serious consequences might arise from discharging such water
Which of the various gasification technologies can truly achieve zero emissions
To be honest, there are no truly zero-emission options; it’s just a relative concept. This is first determined by the composition of coal; ash discharge is inevitable.
What was said upstairs is very reasonable. Given the current level of technology, the composition of coal makes it impossible to achieve true zero emissions. Even if attempts are made to make use of other elements present in coal, the costs are too high and such approaches can lead to secondary pollution, rendering them uncompetitive in the market. However, if resources other than coal on Earth, such as silicon, aluminum, and sodium, become depleted, it may still be possible to utilize them in a comprehensive manner
If anyone talks about zero emissions, it’s just a trick to deceive people.
Texaco, SHELL, and GSP are all commonly used clean gasification processes in China, but it remains difficult to achieve zero emissions. As mentioned on the third floor, the pollution caused by the composition of the coal used is quite significant.
It’s simply impossible to achieve zero emissions. Emissions can be considered in terms of solids and gases; as long as the temperature and pressure in the vaporization furnace are properly controlled, the reaction can proceed adequately, the amount of useful substances in the slag can be reduced, and the CO content in the gases can be increased – that’s enough:handshake
Zero emissions is an abstract concept. True zero emissions are impossible. Generally speaking, when wastewater is treated and reused and waste residues are recycled, it is considered as having no emissions. It’s just talking to myself to reassure myself; it’s necessary for submitting project applications.
Zero emissions is a goal that can always be achieved; in theory, it is entirely possible. In practice, however, many real-world factors mean that this is generally not done.
It seems that true zero emissions do not yet exist. Decarbonization technologies are one aspect; another aspect is what to do with the CO2 that is removed. Investment in this area is also substantial, and without incentive policies, companies are very reluctant to engage in it. Ash and slag, on the other hand, can be used for paving roads and as building materials
I think this is still just a concept; even if there are corresponding measures, they are only at the laboratory level – applying them in factories is nonsense. Today, the desulfurization equipment in thermal power plants exists only to satisfy inspections by officials, not to mention the so-called CO2 capture and storage in IGCC systems. It is true that people’s awareness of environmental protection is increasing, but protecting the environment means higher costs for me. It would be fine if everyone did the same, but is that possible under the current circumstances? Currently, Inner Mongolia, Shaanxi, Ningxia, and Xinjiang are all rushing to develop the coal chemical industry; it’s likely that in N years they will again have to spend a fortune on dealing with the consequences. It are the ordinary people who suffer as a result!
How is it possible to have zero emissions? It’s all just a way to deceive customers. Pollution such as waste smoke and wastewater is bound to exist. No amount of purification equipment will help.
Strictly speaking, it’s called near-zero emissions. This specific standard isn’t fixed either; it’s a conceptual goal. In other words, the current level of technology is not yet sufficient to achieve it
Are there specific treatment processes to enable the concentrated wastewater to meet the corresponding discharge standards?
I’m currently facing the need to prepare a feasibility study to ensure that the concentrated wastewater meets environmental discharge standards. I’m not sure whether it’s feasible to discharge this concentrated water directly into the Gobi Desert. Please help, everyone.
Zero emissions in the chemical industry are not practical; it’s an impossible goal.