In recent years,we have been upgrading our manufacture facilities. Large scale,automated,intelligent and environmental friendly equipments are widely used. They may include:

1. Ø1200 Synthetic ammonia system

    This 100,000 t/a device was self-designed in a way to achieve high heat recovery rate and good separation effect in condensation units,and thus reduce loop resistance and improve overall yield. It is DCS controlled and utilizes advanced heat recovery technology and hydrogen membrane separation technology. ¦µ1200 system was installed in 1996. It saves 124kwh per ton of ammonia which ends up in the increase of 2.5 million yuan of profit annually.

2. Self return soda ash calciner

    2500 self return soda ash calciner is DCS controlled and utilizes non-stop soda ash return technology,furnace head pre-mix and new steam feeding devices. Since its installment in 1997 it has been working well. The saving from steam and energy reaches 3 million yuan annually. 2500 self return soda ash calciner was awarded "1st Prize on Technology advancement" by the China Soda Ash Industry Association,and "2nd Prize on Science & Technology Advancement" by the state Petro&Chemical Industry Agency,and "1st Prize of New Product&New Technology" by the Hangzhou government.

3. 90,000t/a dilute nitric acid device

    We have three devices for production of dilute nitric acid,two in Puyan factory and the third installed in Tangqi Industrial Zone of Yuhang for in consideration of customers convenience. All the three are DCS controlled and utilize low pressure(0.07MPa) technique. The dilute nitric acid we produce was assigned as "Key Product" by the related departments of Hangzhou government.

4. 25t/h double-loop fluidized bed boiler

    This new boiler utilizes double-loop fluidized bed furnace technology. It is DCS controlled and has good flue gas desulfuration/dedusting devices. The steam/coal ratio reaches 7.5:1,saving 300 tons of coal per month.

DCS system

    Since cooperation with University of Zhejiang for the automation engineering of ammonia oxidation process in 1992,we have been integrating DCS in different production processes,eg. combined alkali carbonation,crystallization,calcination,synthetic ammonia,steam boiler,etc. The DCS has been great help in automating data sampling/processing,monitoring,control optimization and share of information in the whole manufacture practice.