In the early days of the new year, a reporter learned from Dagang Petrochemical Company that in January this year, the company's comprehensive energy consumption reached 76.44 kilograms of standard oil per ton, representing a year-on-year decrease of 3.93 units. This improvement led to an increase in energy savings by 1,838 tons of standard coal. Additionally, fresh water consumption was recorded at 0.67 tons of water per ton of processed crude oil, a reduction of 0.07 units compared to the previous year.
Over the past four years, since PetroChina launched its campaign to create energy-efficient and water-saving enterprises, Dagang Petrochemical has continuously improved its basic management and focused on energy and water conservation. This effort has accelerated the transformation of the company’s development model, enhancing its competitiveness and profitability. The company has been recognized as a demonstration unit for Tianjin's circular economy and an environmentally friendly enterprise, as well as one of China’s advanced units in energy and water conservation. In 2007, it was ranked among the top 50 green energy companies in China.
Establishing a long-term and systematic approach to energy and water conservation is crucial for refinery companies. To achieve this, Dagang Petrochemical set up a leading group for energy conservation and emission reduction, refined its three-level energy and water management system (company leadership, functional departments, and workshops), and developed an "Eleventh Five-Year" plan for energy and water conservation. Annual plans clearly defined responsibilities and linked performance assessments with work effectiveness, ensuring accountability and successful implementation.
To enforce these measures, the company implemented strict evaluations based on the "Energy and Water Conservation Management System," increasing both rewards and penalties. At the start of each year, targets from China Petroleum Corporation were broken down into individual production units, and regular inspections were conducted. The completion of these targets was tied to monthly awards and annual performance reviews, significantly boosting grassroots enthusiasm and awareness.
One example of this initiative was the first joint workshop technicians who creatively utilized idle oil seal coolers and recovered secondary steam and condensate, saving approximately 200,000 yuan annually.
The company also set annual energy consumption quotas, covering over 95% of its total energy use. Regular metering and calculations ensured accurate tracking of energy and water usage. Each team performed daily accounting and statistics on energy consumption, allowing for timely optimization of equipment operations. As a result, the third joint workshop improved the operation of the catalytic converter, reducing catalyst unit consumption by 0.06 units year-on-year.
Focusing on cost control, the company enhanced economic activities and equipment cost analysis, improved maintenance, and strictly managed non-productive expenditures. This led to a reduction in cash processing costs by 6.12 yuan per ton, resulting in annual savings exceeding 23 million yuan.
In addition to managing energy and water use, the company invested over 10 million yuan in a postdoctoral research project, completing and commissioning a wastewater treatment and reuse facility with a capacity of 300 tons per hour. This allowed for the recycling of industrial wastewater, with nearly 7 million tons of treated sewage reused, generating over 22 million yuan in value.
By 2006, the company had completed and put into operation a desalination system using ultrafiltration and reverse osmosis, raising the wastewater reuse rate from 50% to 70%. Freshwater consumption decreased by 0.11 units year-on-year, improving water efficiency. Rainwater collection efforts also contributed to significant savings, with 42,000 tons of rainwater collected and 168,000 yuan generated in value.
To further boost energy efficiency, the company will implement projects involving catalytic, coking, and low-temperature thermal utilization of MTBE devices, aiming to reduce energy consumption by more than 1 unit and save 5,000 tons of standard coal annually. An optimization project for the atmospheric and vacuum heat exchanger network is also planned for March this year, expected to cut energy use by 0.2 units and save 1,000 tons of standard coal yearly.
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