Second Prize of National Invention
2. Brief introduction of the project
This project belongs to the technical field of "three wastes treatment and comprehensive utilization". Aiming at the major demand for the sustainable development of the heavy metal industry and the recycling of resources, we have developed key technologies for resources and harmless treatment of industrial vanadium chromium waste residues and ammonia-nitrogen contained wastewater with heavy metal, and realized the high-value reuse of valuable resources in waste and the low-cost advanced treatment of pollutants, providing necessary new technologies support for promoting scientific and technological progress in this field, transforming pollution control models, developing new industries for environmental protection strategies, and completing the national 12th Five-Year Plan for heavy metal and ammonia nitrogen emission reduction indicators.
Vanadium-chromium waste residue and ammonia nitrogen wastewater with heavy metal are typical pollutants produced by heavy industries such as iron and steel, nonferrous metals or batteries. Their high emission intensity and lack of treatment technology have severely restricted the normal development of related industries. In view of the current situation that the above two types of wastes have the dual characteristics of valuable resources and strong environmental hazards and lack of suitable treatment technologies, we have independently developed key technologies and products with green separation and pollution control as the core to achieve low cost and high efficiency of waste treatment. The main technical innovations and invention points are: (1) In view of the current situation of similar chemical properties of vanadium chromium and lack of effective separation technology, a new extraction system for the efficient separation of vanadium chromium (including primary amine extractant LK-N21 and modifier LK-N21X) solved the theoretical and technical bottleneck of the prevention and control of intermediate layer, and realized the key technical breakthrough of rapid and deep separation of vanadium and chromium; (2) Process and equipment of semi-continuous back extraction has been developed for the heat-sensitive and easily emulsified vanadium-rich organic phase, achievimg long-term stable operation of vanadium and chromium extraction separation; (3) For the treatment of high-salt heavy metal ammonia nitrogen wastewater treatment, innovative research and development of pharmaceutical enhanced pyrolysis complex-distillation technology and anti-fouling and high operation elastic tower internals, achieving recycling of more than 99.9 % of ammonia and more than 90 % of heavy metals. It greatly improves the removal rate of ammonia nitrogen in water (one step to reduce ammonia nitrogen from more than 30,000 mg/L to less than 15 mg/L), reduces energy consumption (more than 20 % of energy saving), and ensures stable compliance of wastewater; (4) We proposed a clean process and integrated system of "halogen-free sodium roasting, vanadium chromium extraction separation, ammonia medium circulation, zero water discharge, and energy cascade utilization" for the treatment of vanadium-chromium waste residues, achieving a total resource utilization rate of over 95 % with 10,000-ton scale industrial application, forming a high-value clean utilization of vanadium chromium waste residue with complete independent intellectual property rights and a resource package and harmless process of ammonia nitrogen waste water containing heavy metals.
The project has applied for nearly 30 patents, including 17 authorized invention patents, forming 2 new products. The complete set of technology was used to estabiled the world’s first high-value vanadium-chromium waste residue industrialization project (16,000 t/a) in Liaoning Province in 2009. The resource utilization rate of the main elements of vanadium, chromium, and phosphorus increased from less than 30 % to more than 90 %, without discharge of wastewater in the process.In addition, the pharmaceutical enhanced pyrolysis complexation-rectification technology has also completed 14 advanced demonstration projects in rare earth, nickel cobalt, copper, vanadium, molybdenum, zirconium, niobium and tantalum industries, all achieving the recycling of heavy metals and ammonia nitrogen and stable wastewater standards.
The results of this project have effectively served China's non-ferrous metallurgy, heavy metal materials processing and other industries, and have produced significant economic, environmental and social benefits. For example, the demonstration project has accumulated 900 new jobs and reduced toxic heavy metal waste residues by 50,000 tons. More than 4 million tons of wastewater, nearly 30,000 tons of ammonia, 3,500 tons of heavy metals such as vanadium, nickel, chromium and molybdenum, saving more than 1 million tons of water, and creating direct economic benefits of more than 1 billion yuan. The development and promotion of the project will also provide industrialized technical support for the use of other vanadium-containing chromium secondary resources, the treatment of high-concentration ammonia-nitrogen wastewater and the clean utilization of high-chromium vanadium-titanium magnetite, which is of great significance.
The vanadium-chromium waste residue resource technology has won the first prize of the Liaoning Provincial Technology Invention Award in 2011, and the heavy metal-containing ammonia-nitrogen wastewater treatment technology has won the first prize of the Ministry of Environmental Protection Science and Technology Progress Award in 2012.
7、 Main complete person
| Name | Xingang Li | Gender | Male | Rank | 2 | ||
| Date of birth | 1961.07 | Place of birth | Inner Mongolia | Nation | Han | ||
| ID No. | 120104196107156335 | Party | Other Democrats | Nationality | China | ||
| Administrative Duties | Director of National Engineering Research Center of Distillation Technology of Tianjin University | Returnees | Time to return | ||||
| Work Unit | Tianjin University | Location | Tianjin | Office phone | 022-27404701 | ||
| Completion unit | Tianjin University | Residence Phone | |||||
| Mailing address | No. 92 Weijin Road, Nankai District, Tianjin | Postal code | 266100 | ||||
| lxg@tju.edu.cn | Mobile phone | 13802120350 | |||||
| Graduated school | Tianjin University | Graduation time | 1992.06 | Education level | Postgraduate | ||
| Technical titles | Professor | Professional, expertise | Chemical Engineering | Highest degree | PhD | ||
| Won the national science and technology awards |
(1) Key technologies for system integration and energy saving of large-scale refinery separation process, Second Prize of National Science and Technology Progress, 2007, ranked first (2) Key technologies and equipments of large ethylene quenching system, Second Prize of China Petroleum and Chemical Industry Federation, 2011, ranked first (3) High-concentration ammonia nitrogen wastewater treatment technology and project demonstration, the First Prize of Environmental Protection Science and Technology Award (to be announced), 2012, ranked second (4) High-strength hydrocracking feedstock vacuum distillation integrated technology, First Prize of Tianjin Science and Technology Progress, 2006, ranked first (5) Development and application of key technologies for large-scale rectification process, the First Prize of Scientific and Technological Progress of the Ministry of Education, 2005, ranked first |
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Start and end time of participating in this project |
From January, 2005 to December, 2009 | ||||||
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Contribution to technical creativity of this project: (limited to 300 words) He is the second person who completed the ammonia nitrogen wastewater recycling technology. He made creative contributions to the core technical innovation points 2 and 4, and is especially responsible for the research and development and quantitative design of the internal components of the molecular distillation column of the core equipment. He established numerical calculation model forsimulating fluid flow in distillation columns, which provides a theoretical method for the design of the internal structure of the distillation column. He was in charge of research and development and mass production of new high-throughput column internals for distillation deamination towers, which were used in nearly 20 demonstration projects (among which 13 ammonia nitrogen wastewater treatment projects), achieving significant economic and environmental benefits. |
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Statement: In strict accordance with the relevant provisions of the "National Science and Technology Awards Regulations" and its implementation rules and the specific requirements of the National Science and Technology Awards Office for recommended work, I have faithfully provided this recommendation and related materials, and there is no violation of the PRC Relevant laws and regulations such as the "Law on the Protection of State Secrets" and the "Regulations on the Confidentiality of Science and Technology", and there are no cases of infringement of the intellectual property rights of others. If there is any discrepancy, I am willing to bear the relevant consequences and accept the corresponding treatment. Personal signature: Month day year |
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