In recent years, Zhangjiagang City, Jiangsu Province, Yangzijiang International Chemical Park innovation to establish a systematic environmental governance model to open up the chain of production processes, pollution control chain and monitoring and supervision of the chain, for the green and low-carbon development of chemical parks to provide a useful exploration.
Intelligent transformation, low-carbon transformation, upgrading the green industry chain
Yangzijiang Chemical Industry Park (hereinafter referred to as the Park) is the largest fine chemical industry park in the Yangtze River Basin, with the largest high-performance coatings production base in China. The low degree of automation of the production process and the serious emission of unorganized waste gas are common problems in the industry.
The park promotes leading enterprises to introduce the world's leading PLC (Programmable Logic Controller) / DCS (Digital Control System) intelligent production control system to replace manual operation, to achieve feeding, pulling cylinder, dispersion of the whole process of closed production and intelligent dosage, resource and energy efficiency has been greatly improved, the VOCs materials, "zero fugitive". In the field of functional materials, to replace the photochemically active benzene-containing raw materials and auxiliary materials as a breakthrough, guiding ink manufacturing enterprises to replace toluene and xylene with low-activity alcohols and ester solvents, promoting electronic tape manufacturing enterprises to vacate highly polluting benzene-containing production lines, and realizing a comprehensive iteration of solvent systems and optimization and upgrading of the product structure of key enterprises.
Grasping the opportunity of the "dual carbon" strategy, the park relies on high-tech research and development of hydrogen manufacturing, and promotes the collaboration of upstream and downstream enterprises to build the "Suzhou Hydrogen Innovation Center" covering technology research and development, equipment manufacturing, and scenarios of application. By building a complete industrial chain of "manufacturing, storage, transportation, fuel cell and hydrogen fuel cell", the park has entered a new stage of "technology leadership + industrial agglomeration" in the field of clean energy, which not only supplies energy for transportation in the park, but also radiates the public service, logistics and transportation in Suzhou, It not only supplies energy for transportation in the park, but also radiates public services, logistics and transportation, port terminals and other fields in Suzhou, reducing carbon emissions by more than 13,000 tons.
Scientific and technological traceability, targeted policymaking, the establishment of a precise pollution control chain
Relying on "remote telemetry + three-dimensional traceability monitoring" scientific and technological means, the park seized the high-value characteristic pollutants, through the "fingerprinting" traceability, and found that enterprises with high emissions of hidden problems.
Using infrared thermal imaging observations, it was found that there were obvious leaks in the emergency bypasses of pollution control facilities and breathing valves of organic liquid storage tanks of some enterprises, which contributed to the toluene concentration in the VOCs site of the park; the UAV flight and ground walk monitoring data showed that the concentration of propylene and n-hexane exceeded the standard in the area of flare emission.
In response to the problems identified, the park used the power of science and technology to promote key enterprises to merge the same type of treatment facilities emergency bypass, 14 key enterprises using combustion treatment process with networking online instrumentation real-time monitoring of bypass emissions; more than 300 organic liquid tanks to replace up to the European standard leakage limits of environmentally friendly high-efficiency sealing valves, VOCs emission reduction efficiency of more than 95%; 3 sets of flares to high-efficiency incineration Three sets of flares are replaced by high-efficiency incineration treatment devices to plug the loopholes of waste gas treatment.
Through the implementation of "one enterprise, one policy", direct attack on the weak links in the treatment of gas and pollution control, key enterprises more than 300 governance issues fully rectified and canceled, ineffective and ineffective treatment facilities basically zero.
Dynamic sensing and intelligent management for an efficient chain of custody
The park uses big data, Internet of Things, cloud computing and other advanced technologies to build a comprehensive management platform for environmental protection in the smart park, which opens up the whole chain of information on energy, production, governance and emissions, realizing dynamic monitoring of energy and economic indicators of key enterprises and energy consumption of products, video monitoring of the whole process of key production and emission links, and real-time monitoring of emission data of key outfalls. Once the monitoring of abnormal production conditions and pollutant emissions exceed the standard data, will automatically trigger the alarm and push the closed-loop disposal of enterprises, so that pollution has nowhere to hide.
The park has also established the "carbon steward" regulatory model combining "cloud diagnosis of activated carbon saturation" and "code change", and promoted the installation of integrated monitoring equipment in activated carbon treatment facilities and coded the management of such equipment one by one. It promotes the installation of integrated monitoring equipment in activated carbon treatment facilities and manages them one by one, automatically collects key parameters such as device pressure, wind speed, temperature, humidity and pollutant concentration, and utilizes algorithmic modeling and Internet of Things technology to dynamically analyze and track the trend of activated carbon saturation in real time, so as to realize remote and dynamic supervision of the operation and maintenance of the facilities.
Under the special support of Jiangsu Ecological Environment Department and the scientific and technological support of Jiangsu Academy of Environmental Sciences, the park has made up for the short board of monitoring with scientific and technological equipment, built up the foundation of perception with intelligent system, and greatly improved the efficiency of environmental supervision. Green industrial chain, precise pollution control chain, intelligent supervision chain "three chains" synergistic force, mutual support, promote the park to achieve green low-carbon development.
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