Benchmark enterprise for VOCs comprehensive management in packaging and printing industry ③ Hebei Zhiyoujie: three approaches: source, process and end, with remarkable VOCs management effect
In order to maintain the sustainable development of soft packaging enterprises, it is necessary to meet the standard of environmental protection governance. Since the promulgation of the air pollution control laws and regulations, many soft bag enterprises have begun to take various measures to control VOCs. After years of exploration and discussion, a large number of enterprises with outstanding performance in environmental protection have emerged, including Hebei Zhiyoujie New Material Technology Co., Ltd, I believe that their valuable experience will certainly bring valuable reference to the soft package enterprises that are still looking for appropriate governance solutions.
Zhiyoujie has always attached great importance to environmental protection. Since the planning and construction of the new plant, various governance schemes at home and abroad have been investigated. After repeated investigation, expert consultation and rigorous demonstration, according to the characteristics of the enterprise, a three pronged governance mode has been developed, which includes the source, process and end. Source: the gradual substitution of ink painting is adopted; Process control: seal the printing line to reduce the unorganized smell; Terminal treatment: adopt the technical route of "air reduction and concentration increase+RTO" with high removal efficiency and ultra-low emissions. At the same time, online detection equipment connected with the environmental protection department has been installed. Such a systematic and complete treatment scheme has achieved good treatment effect. Through third-party monitoring and self monitoring, the average VOCs emission value is only 7.76mg/m3, far below the standard, achieving stable ultra-low emissions, and has been running steadily for two years. Therefore, it was rated as a "benchmark enterprise for VOCs comprehensive governance in packaging and printing industry" by the VOCs governance committee of the China Association of Printing Industry.
1、 In terms of source substitution, water-based ink and white ink are used to replace part of solvent ink in the printing process, and more than 70% of the composite process uses solvent free composite.
At the beginning of the production of the new factory, Zhiyoujie began to replace solvent based ink with water-based ink. With the continuous in-depth understanding of the ink process by workers, the proportion of the use of ink has gradually increased. At present, the proportion of white ink has reached 30%. In addition, in the compound link, their solvent-free use ratio has reached more than 70%. The use of a series of environmental protection processes has greatly reduced exhaust emissions. They also actively participated in the key project of Beijing Municipal Science and Technology Commission "Research on in-depth comprehensive emission reduction and control technology of VOCs in Beijing Tianjin Hebei packaging and printing industry" undertaken by Beijing Printing Institute, China Association of Printing Industry, Beijing Academy of Environmental Sciences, and Beijing Huachuang Langrun, and are studying the ethanol recovery and treatment technology scheme of experimental intaglio ink.
2、 In terms of process control, the printing line is sealed to reduce the unorganized smell
One of the major difficulties in VOCs treatment in soft packaging enterprises is how to solve the problem of odor in the workshop (i.e., unorganized exhaust gas), which comes from the concentrated exhaust gas from the oven circulation, the volatile exhaust gas from the ink tray, the volatile exhaust gas from the pipeline, the volatile exhaust gas from the auxiliary materials and other places. For this reason, Zhiyoujie adopts the following control modes:
1. Oven circulation of concentrated waste gas: make the oven slightly negative pressure, control the negative pressure around the oven and the coupling gap, and avoid waste gas overflow.
2. Volatile waste gas from ink tray: In terms of production equipment, all ink grooves in the printing unit of the Best printing machine are sealed to reduce air exposure and waste gas volatilization. The printing workshop has designed and built a sealed ink dispensing room and an automatic ink dispensing system;
3、 In terms of terminal treatment, TANNRTO organic waste gas treatment and thermal storage incineration equipment (RTO) from the United States has been introduced, and the purification efficiency can reach more than 99.5%, and the organic waste gas can reach a stable ultra-low emission after treatment.
In order to save energy consumption, before combustion, the organized waste gas discharged from the printing machine and the laminating machine is used for LEL air reduction and enrichment, and then the VOCs waste gas is transmitted to RTO through the pipeline for combustion treatment.
At the same time, according to the company's own characteristics, a heat transfer oil waste heat recovery system and a heat storage incineration equipment (RTO, Both environmental protection benefits and economic benefits have been achieved.
In addition to the great investment in environmental protection, Zhiyoujie also spared no effort in talent team construction, enterprise management and quality control. The main management and technical personnel are high-quality talents with rich experience who have been engaged in the printing and flexible packaging industry for more than 15 years. Such a stable team of talents ensures the sound development of the enterprise; The company also uses ERP management software to achieve effective traceability control from raw materials to finished products, and is equipped with international testing instruments and equipment to ensure the stability of customer product quality.
This time, it was rated as a benchmark enterprise for VOCs governance in the industry. Pei Jianhong, general manager of Hebei Zhiyoujie New Materials Technology Co., Ltd., said: As an enterprise, it must have a global view and strategic vision of industrial development, and not only care about the immediate economic interests. Environmental protection governance is a social responsibility that an enterprise must assume. Only taking the healthy, environmental protection and recyclable development of the soft packaging industry as the starting point, adhering to the principle of creating value for customers The business purpose of creating opportunities for employees and benefits for the society can keep the foundation evergreen! On the road of environmental protection governance, Zhiyoujie will continue to work hard to provide more high-quality, efficient and fast environmental protection solutions for the green development of China's soft packaging industry with its own wisdom.
(Source: Printing Industry Magazine)