Boosting development of Wanlida Paper
In recent years some of China’s fastest growing regions are implementing more ambitious air pollution reduction initiatives than is true of the country as a whole. Among these regions is the city of Guangzhou, known historically as Canton, an area well-known for its exotic-sounding Cantonese language and adventurous spirit. This region has for centuries been unique in China due to its export-based economy and the large number of Cantonese descendents living abroad, in particular in Southeast Asia and the United States. In recognition of Guangzhou’s increasing economic success and regional prominence, the city was awarded the Asian Games athletic competition for 2010. With Guangzhou’s economic growth in recent decades, the issue of air pollution has become ever more pressing. Among the most important contributors to the air pollution problem has been nitrous oxide (NOx) pollution, with power plants being the most important source.
With a set of aggressive goals in mind, Guangzhou Wanlida Paper Products Company contracted LP Amina to reduce NOx pollution and raise productivity from three of its power plants. Guangzhou Wanlida Paper, a part of the Hong Kong Win Yiu Group operates several coal-fired steam boilers which provide both process steam and electricity for manufacturing, a process known as cogeneration. The cogeneration process, makes use of synergies available in the simultaneous production of process steam and electicity; inherently a more energy efficient process than making each separately. Nevertheless Wanlida at the behest of the local Guangzhou Government sought further environmental footprint reductions. Reviewing various retrofit proposals Wanlida selected LP Amina’s project offering. LP Amina’s project, slated for assembly in June, 2010 offers combustion optimization coupled with Selective Non Catalytic Reduction (SNCR) to reduce nitrous oxide (NOx) emission from 700 mg/m3to 200 mg/m3. In addition to the 70% emission reduction achieved by LP Amina, Wanlida was further impressed by two other factors in the LP Amina proposal. Unlike other rival bids, LP Amina’s advanced combustion optimization proposal guaranteed that energy efficiency from 2×45 MW and 1×80 MW Wanlida units would be maintained or increased. Second, LP Amina was able to offer one point of responsibility for the entire project, in that LP Amina’s offer included in-house responsibility for both combustion modification and a unique, newly-patented SNCR system. Co-engineering an advanced combustion optimization system together with the a purpose-built SNCR system allowed Wanlida to enjoy significant SNCR operating cost reductions while delivering a high NOx pollution reduction rate.