Printing and dyeing industry: the key to sustainable development

In a day and a half, there were more than 60 papers and 25 special reports; the listeners in the venue were attentive, and the representatives outside the venue exchanged actively and enthusiastically-this was the scene at the 8th Printing and Dyeing Finishing Seminar.

 

　　It is not difficult to find at the conference that my country's printing and dyeing finishing technology has made significant progress in recent years. At the same time, the implementation of various ecological environmental protection standards and new industry access conditions has higher requirements for the extension of finishing technology. Various printing and dyeing enterprises have accumulated rich practical experience and scientific and technological achievements in scientific research, production, and auxiliary agent development for finishing technology.

 

What are the key issues that printing and dyeing companies are paying attention to? What are the most difficult problems that printing and dyeing companies need to overcome? What new finishing technologies can be applied in future production? With these problems, the reporter tried to listen and listen Analyze and hope to get answers to questions through this high-level dialogue between experts.

 

　　 pay more attention to: the key points of the sustainable development of the printing and dyeing industry

 

　　The problems facing the development of the industry and the technical route of sustainable development are one of the hot spots that printing and dyeing enterprises pay more attention to.

 

　　 The establishment of a printing and dyeing (chemical) industrial park, the use of advanced equipment with a high degree of automation, low energy consumption, and less pollution, and the use of sustainable new technologies and new processes are the key points for the sustainable development of the printing and dyeing industry in the future.

 

　　 The report "A Preliminary Study on the Sustainable Development of Printing and Dyeing Industry" by Wang Jiyong, director of the Printing and Dyeing Professional Committee, attracted great attention from the participants.

 

　　 From the overall situation of the textile industry, the dyeing and finishing industry is still a bottleneck in the development of the textile industry. This is mainly because my country does not have enough resources to support the backward, high-energy-consuming dyeing and finishing production methods, and there is insufficient environmental capacity to carry the highly polluting production methods. To this end, to maximize the control of the consumption of non-renewable resources, reduce waste emissions in the production process, energy conservation, emission reduction, and environmental protection will become the main goals of future production and technological development, as well as the key to sustainable economic development. Under this circumstance, how can the printing and dyeing industry achieve sustainable development? Wang Jiyong talked about several views: establishing a printing and dyeing (chemical) industrial park, adopting advanced equipment with high degree of automation, low energy consumption and less pollution, and adopting sustainable development New technologies and new processes are the key points for the sustainable development of the printing and dyeing industry in the future.

 

　　 Regarding his own point of view, he suggested that steam can be used to generate electricity first, and then the steam can be used for printing and dyeing production, which is equivalent to using energy twice. At the same time, printing and dyeing manufacturing costs can be reduced. The steam after power generation does not need to be cooled directly to the printing and dyeing factory, which can save the cost of steam cooling. At the same time, the steam after power generation has no cost, which can greatly reduce the energy cost of manufacturing printing and dyeing products. In terms of reducing the cost of wastewater treatment, Wang Jiyong suggested that the wastewater from the printing and dyeing plant should be filtered through waste slag for simple treatment before it is discharged into the sewage treatment plant, which can remove part of the color, reduce the pH value of the wastewater, and remove most of the suspended solids before further treatment. , Can greatly reduce printing and dyeing wastewater treatment costs.

 

In the future, the printing and dyeing wastewater in the park will be combined with a combination of decentralization and centralized treatment. It is proposed that the government must require printing and dyeing enterprises to achieve clear turbidity and diversion. Recyclable wastewater should be used in production. Do not wait for wastewater treatment before recycling. This will not only reduce the final The amount of sewage processed can reduce the cost of water utilization and reduce the difficulty of the final sewage. Such pertinent and practical suggestions deserve the attention of government departments. This method is also very operable for production enterprises.

 

　　 In the past ten years, my country's printing and dyeing equipment has made great progress, and there is no obvious difference from the equipment of South Korea and Taiwan, and even some models have reached the international advanced level. However, as the results of the survey on the use of printing and dyeing machinery jointly organized by China Textile News and China Textile Machinery and Equipment Industry Association in the past two years show: "The problems with domestic printing and dyeing equipment are obvious, mainly concentrated in poor stability, high energy consumption, There are four aspects of low automation and running drips. Although these old problems have been improved for many years, users still seem to be dissatisfied. Although digital online detection and control technology, computer network technology and other high-tech printing and dyeing equipment continue to join the ranks of printing and dyeing equipment, domestic printing and dyeing The automation of equipment is continuously improving, energy consumption and water consumption are gradually decreasing, and the three major problems of chromatic aberration, weft skew and shrinkage are gradually improving. However, the problems of poor stability and running, dripping and leakage still exist, and things seem small. , But it is the most important gap between domestic equipment and imported equipment. It is the stubborn disease of domestic equipment.” However, this situation has been fundamentally affected by the acquisition of the world’s largest dyeing and finishing equipment manufacturer by China Hengtian Group. It is improved. Judging from the current state of the world's dyeing and finishing machinery technology, it is not believed that there are many key equipment technical problems that cannot be solved hinder the development of energy-saving and emission-reduction work in the textile printing and dyeing industry today.

 

　　 The current dyeing and finishing equipment has made use of the most advanced technological achievements of the time, and the dyeing and finishing equipment industry is already a technology-intensive industry. More mature technologies are mainly reflected in computer automatic control technology, dyeing and chemical central distribution system, online detection and measurement control technology, waste heat recovery and utilization device, water reuse technology, airflow dyeing machine, modern jigger, continuous chemical fiber fabric Degreasing water washing machine and new energy utilization technology.

 

　　 is needed: reasonable application of advanced equipment and technology

 

　　 The practical application of dyeing and finishing technology in the enterprise and the enhancement of the added value of the product.

 

Biological enzyme pretreatment technology, mercerized alkali closed cycle recycling technology, small liquor ratio dyeing technology, reactive dye wet short steaming technology, reactive dye cold pad-batch dyeing technology, paint pad dyeing technology, vegetable dye dyeing technology, pigment printing Technology, digital printing technology, foam dyeing finishing technology and enzyme finishing technology, etc., these relatively mature finishing technologies can be directly adopted by printing and dyeing enterprises in the production process.

 

　　 On the afternoon of March 9, the conference organizer arranged for participants to visit Zhejiang Yongxin Printing and Dyeing Co., Ltd.

 

　　 The company has left a deep impression on people in the practical application of the fully automatic computerized pulping system, wax spraying net system, printing laboratory dripping color matching system and rainbow high-speed digital printing machine. In the face of these advanced production and application systems and equipment, visitors paid a high degree of attention.

 

After Yongxin Printing and Dyeing introduced Hangzhou Kaiyuan Computer Technology Co., Ltd. automatic computerized pulping and other systems, the products not only improved the accuracy of the color paste preparation, but also ensured the stability and reproducibility of the color and light, and the color paste reproduction rate was further improved. The 82% before use increased to over 95%. In terms of dye auxiliaries, the residual slurry and residual slurry have been greatly reduced, and the residual slurry and residual slurry can be fully utilized, reducing the waste of dyeing materials by 15%, and saving more than 1 million yuan in dyeing material costs each year.

 

　　The key technical link of finishing-the dripping color matching system of the printing laboratory has also been well reflected in the production of Yongxin Printing and Dyeing. It significantly improves the accuracy and color reproducibility of the proofing formula. The mother liquor and paste of the sample are consistent with the mass production, and the formula adopts the same database, and the sample is directly transferred to the mass production. At the same time, human error is eliminated, and the seamless connection between sample making and large-scale production is realized. In addition, there is no need to manually recalculate the formula after the color is changed, only the computer can automatically modify the formula and then re-mix the pulp, which improves the color change efficiency. When the product needs to be returned to the order, there is no need to re-modulate the formula, just call the computer sample library data directly. Ensure the consistency of formula data and reduce human error.

 

　　The high-speed digital printing machine produced by Hangzhou Kaiyuan has assisted Yongxin Printing and Dyeing to achieve rapid proofing. Nowadays, the proofing requirements submitted by customers can be completed within 1~2 working days instead of 1~2 weeks.

 

　　 Yongxin printing and dyeing application of digital printing technology has also achieved good energy saving and emission reduction effects. Compared with the traditional printing technology, the average power consumption of the whole machine is reduced by 35%~50%, the water consumption is reduced by 25%~40%, the dye consumption is reduced by more than 60%, and the pollution degree is only 1/25 of the traditional printing. Easy to handle.

 

　　The adoption of sustainable new technologies and new processes is still the top priority for the transformation and upgrading of the current printing and dyeing enterprises. For example, biological enzyme pretreatment technology, mercerizing alkali closed cycle recycling technology, small liquor ratio dyeing technology, reactive dye wet short steaming technology, reactive dye cold pad-batch dyeing technology, paint pad dyeing technology, vegetable dye dyeing technology, paint Printing technology, digital printing technology, foam dyeing finishing technology and enzyme finishing technology, etc. These relatively mature finishing technologies can be directly adopted by printing and dyeing enterprises in the production process. If an enterprise applies it reasonably in accordance with its actual production, then these new processes and new technologies can bring more economic benefits to the enterprise.

 

　　 From the current point of view, some key technical and process issues are still worthy of further discussion and attention by printing and dyeing enterprises. With the strict implementation of the national energy conservation and emission reduction policy, new equipment, new dyestuffs, new processes, and new technologies in the printing and dyeing industry are "emerging in an endless stream". There are indeed many high-tech and new technologies, but there are many fake technologies among them. Before adopting these new technologies, enterprises must fully research and avoid listening and flicking. Experiment first, apply later; settle accounts first, buy later. Only in this way can we ensure that both technical production and economic benefits are correct.