Environmental issues in coal chemical industry

Environmental issues are indeed very important; the coal chemical industry generates wastewater, which needs to be addressed by building large-scale wastewater treatment plants； The disposal of waste residues is mainly achieved through reuse as building materials ； The treatment of exhaust gases involves burning them in flares, which releases carbon dioxide and causes pollution to the atmosphere

Taking water-coal slurry as an example, the water used in system circulation is purified through flashing, with most of it being reused while a portion is sent for wastewater treatment； As mentioned above, gas pollution is indeed a problem, but there are also certain sulfur-containing gases that, upon combustion, produce SO2 and SO3, which can easily lead to acid rain.

It’s mainly wastewater and waste gas; when both economic and environmental aspects are taken into account, the prospects for coal chemical industry are certainly not to be underestimated. Mainly nitrogen and sulfur pollutants, as well as some cyanides, polycyclic aromatic hydrocarbons, etc. Therefore, the key to coal chemical industry lies in the preliminary preprocessing!

The coal chemical industry has a bright future, but it is now believed that its pollution problems need to be addressed promptly

It seems that if the coal used in coal chemical processing is of better quality, with fewer impurities, it can be very helpful in reducing emissions. It seems that the coal from Tengzhou and Peixian in Xuzhou has good quality and can be used directly in coal chemical industries.

Environmental protection issues are a major challenge for coal chemical enterprises!

The treatment of wastewater from coal chemical industries is complex, primarily due to the complexity of its components and their high concentrations. The presence of ammonia, phenols, polyphenols, and other long-chain polycyclic substances in the water often inhibits biological activity during biochemical treatment processes or makes these substances difficult to biodegrade. To address pollution issues, one approach is to utilize biochemical methods and improve the adaptability and efficiency of such processes; however, relying solely on this approach yields limited improvements at present. The most important solution is to adopt gasification processes that result in low pollutant emissions, or to enhance the efficiency of pre-treatment processes prior to biochemical treatment. There is still much work to be done in terms of environmental protection in the coal chemical industry. When choosing environmental protection technologies, it is essential to be extremely cautious, so as not to leave future generations with severe environmental pollution as a consequence of the current boom in coal chemical production.

The pollution associated with coal chemical industry can be mainly summarized into two aspects: wastewater pollution and exhaust gas pollution. Many schools and enterprises are conducting research on exhaust gas pollution, but as for wastewater pollution, there aren’t many research reports on this topic. China University of Mining and Technology in Beijing is working on research related to the treatment of wastewater generated from underground coal gasification, though progress seems to be slow.

In fact, much work has already been done in the area of research on coking wastewater. After pretreatment to reduce the pollution load of gasification wastewater, the treatment processes for such wastewater can draw on those used for coking water.