China Petrochemical environmental protection technology force hair flue gas treatment

In early December, the reporter learned from the Design Branch of Dalian Engineering Construction Company (CPECC) that CNPC relied on the autonomy and high-efficiency catalytic cracking regenerated flue gas developed by the major scientific and technological development projects of "complete sets of technology development and industrial application of 10-million-ton large-scale refinery" Desulfurization and denitrification complete sets of technologies, set Dalian Branch Design FCC flue gas desulfurization and denitrification project rich experience in project construction, has successfully developed catalytic cracking, thermal power plant boilers, sulfur recovery unit, furnace flue gas desulphurization and denitration series of technology, and supporting Efficient patented equipment and advanced design software, and has completed the "12th Five-Year" full-scale environmental protection desulfurization technology transformation.

During the 13th Five-Year Plan, a new round of flue gas denitrification retrofits by various petrochemical enterprises in PetroChina are being carried out.

China's "Twelfth Five-Year Plan" made it clear that "the total discharge of major pollutants significantly reduced, sulfur dioxide emissions reduced by 8%, nitrogen oxide emissions reduced by 10%" binding targets. MEP directly signed with China's PetroChina "" responsibility for reducing the total amount of major pollutants during the 12th Five-Year Plan ", setting clear requirements on the amount of emission reduction during the" 12th Five-Year Plan "period of PetroChina. Coupled with the successive promulgation and implementation of environmental standards such as "Emission Standards for Pollution from Petroleum Refining Industry", each refinery of PetroChina has formulated a clear timetable for compliance with the standards of flue gas emissions from catalytic cracking units.

Starting from 2010, with the help of Group Science and Technology Major Project "Development and Industrial Application of Complete Sets of 10-Million-ton Large-scale Refinery," Under the leadership of relevant group leaders, Dalian Design Branch is fully responsible for buying and selling ExxonMobil's advanced wet process Venturi washing (WGS) flue gas desulfurization and denitrification technology, used in China Petroleum refinery flue gas desulfurization and denitration construction. Through the re-innovation of digestion and absorption, CNPC combined with the increasingly stringent environmental standards and the status quo of catalytic devices in China to fully construct a catalytic flue gas desulfurization and denitrification facility to meet the requirements of environmental protection standards and pollution reduction.

In 2013, with the completion of the first WGS flue gas desulfurization facility in Jinxi Petrochemical Company and the first fully domesticized WGS desulfurization technology, the successful operation of Ningxia Petrochemical Company marks that Dalian Design Branch has fully mastered the international advanced Desulfurization technology. At the same time, Dalian Design Branch actively explores the international advanced catalytic flue gas denitration technology and has in-depth exchanges and cooperation with a number of international advanced denitration technology suppliers, with the continuous strict environmental standards and the status quo of catalytic devices, pioneering and innovative, self-developed SCR, SNCR and a whole set of China's high efficiency catalytic cracking of flue gas desulphurization and denitrification complete sets of technology, the company catalytic flue gas desulphurization and denitrification facilities to provide a strong technical support.

Up to now, CNPC has formed 8 sets of different technology and different scale catalytic flue gas desulphurization and denitration process packages, obtained 6 national patents, obtained 4 technical secrets of the group company and passed the scientific and technological achievements appraisal of the group company.

Experts believe that CNPC's own FCC flue gas desulfurization and denitrification technology has high desulphurization and denitrification efficiency and meets the requirements of the most stringent environmental standards in China. The venturi suction process is adopted to reduce the pressure drop of flue gas desulphurization facilities without affecting the operation of the original catalytic device , Which is suitable for the reform of catalytic desulfurization system. The desulfurization and denitrification facilities operate stably and reliably, and can meet the needs of long-term stable operation of the catalytic device. Compared with similar desulfurization and denitrification technologies, the desulfurization and denitrification technology has the advantages of low investment, low energy consumption and small floor space.

Since 2008, Dalian Design Branch has completed the design of 26 sets of catalytic flue gas desulfurization projects and 14 sets of catalytic flue gas denitration projects. Among them, desulfurization technologies involve WGS, EDV and air tower spraying. DeNOx technologies include SCR, SNCR, ESNCR, LNB, covering the most advanced catalytic flue gas desulfurization and denitrification technology at home and abroad, has accumulated a large number of design and operation experience. After all projects are put into operation, the operation is stable and reliable. After flue gas purification, it meets the design targets to meet the requirements of national and local environmental laws and regulations and solves the urgent need for environmental protection of enterprises. It has achieved annual emission reduction of 14,000 tons of nitrogen oxides for the Group, Emission of 22,000 tons and emissions of 4,000 tons of particulate matter, laying the foundation for the goal of reducing the total amount of major pollutants during the 12th Five-Year Plan period and also providing strong technical support for overall clean development during the 13th Five-Year Plan period.

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