Environmental Protection Facilities

CSPC has been awarded the ISO14001:2004 certification by British Standards Institutes. To make sure the high environmental standards are met, CSPC constructed sophisticated environmental protection facilities, which include:

 

Solid Waste Incinerator

 

The Solid Waste Incinerator burns process solid wastes. With the high temperature inside the incinerator, the organic and hazardous part of the waste is decomposed and the volume is reduced significantly.

 

Active carbon absorption bed, de-sulfurizing equipment and precipitator were installed to remove the dust and low content of sulfur dioxide and organic matters. After this process, the gas can be discharged in compliance with national standards. The ash inside the incinerator and the dust collected by the precipitator will be transported to the designated landfill for safe disposal. So the impact to the environment is minimized.

 

Liquid Condensate Incinerators

 

The effluent from the SM/PO plant and other units is not easily treated in ordinary effluent treatment plant. However, in CSPC it is thoroughly treated in the liquid condensate incinerator, where the organic and hazardous waste of the effluent is converted to carbon dioxide, nitrogen oxide and vapour for safe discharge.

 

Effluent Treatment System

 

The effluent collected from CSPC complex are strictly managed in separate systems: the non-contaminated drain system for clean surface water collected from non-contaminated area, the potential contaminated drain system for the surface water which has the possibility of being contaminated from the open operation areas, the continuous contaminated drain system for the industrial waste water from manufacturing processes and sanitary sewage system for domestic waste water. The effluents collected by the different systems are treated differently.


The process effluent and domestic waste water are treated in the effluent treatment plant which has a capacity of 500 tons / hour. Meeting the permitted standards, the treated waste water is discharged into Daya Bay via a 22-kilometer long undersea pipeline.

 

To ensure effluents are discharged to permitted standards, 20 sets of sophisticated online equipment are deployed in the Effluent Treatment Plant, and the Central Laboratory analyses some one hundred samples every day. 

A 30,000m3 controlled discharge basin is built to avoid accidentally contaminated water and fire fighting water polluting the sea in case of emergency discharge.

 


Phosphate Free Program for Recycling Water

 

The total recirculation rate of CSPC's cooling water is 180,000 tons per hour. The application of the phosphate free program increases the concentration ratio and saves 2.85 million tons of water per annum. Thanks to the phosphate free program, the chemicals for treatment does not contain any phosphate and other toxic and hazardous elements. The effluents from recycling water system is up to the Class I Chinese national standards and can be directly discharged, thus being both environmentally friendly and energy saving.

 

Online Monitoring of Environmental Parameters

 

CSPC strictly controls all process emissions, leakages and overfills, and sets rigid control targets to minimize uncontrolled chemical release. A large number of online monitoring instruments are installed. The monitoring of effluents, emissions and noise is undertaken by CSPC professional environmental staff and designated third party laboratories.

· All stacks are installed with monitoring equipments to provide real time air pollutant concentration data;
· The effluent treatment plant is equipped with a variety of on-line analyzers to monitor the status of the waste liquids being processed and the status of treated water for discharge;
· Highly sensitive monitoring analyzers for toxic and hazardous gases are installed at 160 locations;
· 880 sets of monitoring equipments are employed for the detection of flammable and toxic gases;
· 500 sets of quality / environment analyzing equipments are installed, taking the lead among the complexes with comparable scale.

 

Jetty Anti-Pollution System

 

Comprehensive measures are taken at the CSPC jetties to eliminate possible contamination operations. All vessels are not allowed to discharge ballast with the exception of the separate ballast tanks; dedicated pipelines must be used for oils and chemicals and a closed operation mode is adopted.

 

All vessels are subject to vigorous inspection and go through the Ship Inspection Report Program before being allowed to berth. During operation, booms must be deployed to encircle the ship as well as the operation area. In case any emergency occurs, the leakage will be confined to a restricted area and will be recovered and handled quickly.

 

In addition, a pollution control boat is in place ready to respond to any emergent oil and chemical spillage in Daya Bay; the three fire fighting tugs equipped with oil recovery facilities are on standby against fire and oil pollution throughout berthing/unberthing operations.


To protect the environment from being affected by volatile or toxic products during ship loading, vapor recovery systems consisting of a low pressure burner, a benzene vapour recovery system and styrene monomer vapour absorbent equipment have been installed at the jetty.

 

 

Effective Energy Saving Design

 

· The ultra selectivity cracking furnaces and advanced recovery system of Stone & Webster were applied in the LOP Plant;
· The SM/PO Plant adopted the state-of-art oxidation technology of Shell to produce propylene oxide. Compared with the traditional chlorohydrin method, the technology has the merits of low water and energy consumption;
· Over 95% of the 148 high-power electricity generators were regulated by ‘frequency convertor’;
· The reliable flare gas recovery system to collect hydrocarbons to be used as fuel gas.