Hu Qianlin, deputy secretary-general of the China Petrochemical Federation and secretary-general of the Coal Chemical Industry Committee, said that the current solid waste and waste gas treatment and emission from coal chemical industry can be basically controlled, and wastewater treatment is difficult, especially high-concentration refractory organic wastewater. . For example, the fixed-bed gasification and low-rank coal thermal cracking processes have complex wastewater components and contain hard-degradable tars, phenols, polyhydric phenols, etc., and are difficult to handle using general biochemical processes. In addition, the treatment of salty wastewater is also difficult, and it is difficult to achieve near-zero emissions in areas lacking pollution conditions. In recent years, many coal chemical companies have been actively working on sewage treatment, but their actual results have been unsatisfactory. Practical techniques and techniques are still in the exploration stage and the cost is high.
Coal is the fossil fuel with the highest carbon content. In 2015, the CO2 emissions from the coal chemical industry was approximately 470 million tons, putting pressure on China's carbon emission reduction. The national unified carbon emission trading market is scheduled to be trial run in 2016, and carbon tax will also be accelerated. This will inevitably increase the investment cost of coal chemical projects and affect its overall competitiveness. Once the carbon tax exceeds 100 yuan/ton, coal chemical projects will be difficult to bear.
Hu Qianlin stressed that in order to solve these problems, we must implement the strictest environmental protection standards and earnestly implement an environmental impact assessment system to ensure that the environmental protection facilities and the main project are simultaneously designed, constructed, and put into operation at the same time. In particular, on the discharge of waste water, the management requirements for the restricted red line in the water function area must be strictly implemented. The coal chemical project must meet the following conditions: All the process wastewater is recycled, the circulating water system wastewater is not discharged outside the plant area, and there are perfect groundwater seepage prevention measures.
Zhou Zhuye, vice president of the China Petrochemical Federation, put forward three suggestions on how to promote the green, low-carbon and recycling development of the modern coal chemical industry: First, strictly implement the “three simultaneouss†during the construction and operation of the coal chemical project. Strictly implement the "Air Pollution Prevention Action Plan" and strengthen clean production and pollution control. Comprehensive utilization of general industrial solid wastes such as gasified ash, boiler ash, etc., and the use of unusable waste residues such as high salt water enriched salts to the slag yard for storage or landfill, hazardous wastes such as spent catalyst should be supported by Special facilities for recycling.
The second is to actively research and develop the "three wastes" treatment and energy-saving water-saving technology research, carry out efficient and reasonable zero-emission or near-zero emission technology, improve the industry's energy-saving, water-saving and environmental protection level. Such as air-cooled water-saving, low-level thermal energy utilization, efficient energy-saving, high efficiency dust removal, sulfur recovery, denitrification, phenol recovery, waste water pulping, activated carbon adsorption and other technologies.
The third is to strengthen CO2 capture, application and storage technology development, carry out CO2 flooding, microalgae absorption, geological storage and other test work, and encourage qualified areas and coal chemical companies to develop CO2 recovery and utilization technologies, such as carbon sinks, flooding , purge gas, CO2 chemicals and other technologies.
At the meeting, many representatives of coal chemical companies and related experts put forward proposals and opinions on how to establish a new environmental image of modern coal chemical industry.
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