Project Introduction
Recently, Hebei Leheng Energy Saving (a subsidiary of Zhejiang Yaguang, stock name: Yaguang Shares, stock code: 603282) won the bid for the Hefei thermal power steam pipeline boosting EPC project and the system was successfully started at one time.
The project was tendered by Hefei Thermal Power Group Co., Ltd., requiring the provision of full-process construction services for the terminal steam pipeline boosting system for Taiwan Uni-President Foods, aiming to solve the urgent need for stable steam supply in its industrial park. During the EPC project, Leheng Energy Conservation designed and manufactured centrifugal steam compressors, as well as the anti-surge technology used, and assumed particularly important responsibilities in the entire project.
Project Background
The project is affiliated to Hefei Thermal Power Jinyuan Branch. As the steam is transported to Tongyi Food Park over a long distance, the pressure level of the existing pipeline system cannot meet the stringent requirements of long-distance transportation. Therefore, the core strategy of the project is to introduce steam compressor technology to increase the steam pressure in the pipeline and ensure that the steam can reach the steam-using enterprises in a stable manner with required quality and quantity.
Project Challenges
Technical problem 1: Special working conditions and large flow fluctuations
In this steam pipeline boosting project, the actual operating steam flow fluctuates greatly. How to ensure that the flow fluctuates greatly between 2-18T / hr without causing surge problems and ensure the normal operation of the compressor is a technical problem that needs to be solved.
Technical Problem 2: High requirements for compressor adaptability and stability
The adaptability and stability of the compressor in the actual environment directly determines whether the equipment can exert its functional advantages, ensuring that steam can reach the park efficiently and stably, in line with the production needs and standards of Uni-President Food Company.
Technical Problem 3: System Integration and Compatibility Issues
It is a huge challenge to effectively integrate the boosting equipment with the existing steam network and other related systems. During the integration process, it is necessary to consider how to ensure the compatibility between the new equipment and the old system to avoid pressure fluctuations, leakage and other problems. The system also needs to be flexibly started and stopped according to the steam pressure and flow of the network, which places high requirements on program control.
Construction problem 1: Tight construction period and high execution efficiency requirements
The project schedule was tight, which put forward extremely high requirements on the construction progress. In a short period of time, a series of complex tasks including design, procurement, construction, installation and commissioning needed to be completed, which was a very arduous task.
Solution: combining reasonable technical design with efficient execution
Reasonable aerodynamic design and structural design
In terms of equipment selection, Leheng designed and manufactured a centrifugal steam compressor with a flow rate of 15T/ hr. In single-stage mode the transported steam is compressed from the saturated state of 700.3KPa,A to 1225.52KPa,A.
In order to further enhance the adaptability and stability of the compressor, Leheng has broadened the operating flow range of the compressor through anti-surge technical measures, enabling it to flexibly adapt to a wider range of working conditions within the range of 2-18T/ hr, ensuring that steam can reach the park with high quality and high stability, in line with the production needs and standards of Uni-President Food Company.
An efficient project execution team ensures that the system successfully started the tested running at the first time
In terms of project management and execution, the we formulated a detailed and scientific construction plan. It took about 65 days from the receipt of the project in August to the completion and delivery of the project in October. Our team completed the commissioning work with an ultra-efficient response speed.
Project operation performance:
Successful start-up at the first time with all indicators meets the technical specifications
Project technical indicators:
Flow range 2-18T/ hr
Design flowrate 15T/ hr,
The actual operation data:
Steam pressure: exhaust pressure 1225.52KPa
Steam temperature: exhaust temperature 189℃
Steam flow rate : Design flow rate 15T/h , applicable flow rate range 2-18T/ hr
Pressure ratio: 1.75
Automatic control and remote monitoring:
The booster system starts and stops as needed depending on the steam supply situation
And equipped with advanced remote real-time monitoring system
Excellent performance in maintenance cost control: Timely detection of potential problems and issuance of early warning signals saves manpower and material resources, and avoids large-scale maintenance and production interruptions.
Enterprise witnesses the quality of product and service
Over the years, our systems and equipment have been verified by many of our customers on site. All systems and equipment have demonstrated excellent stability and performance. Our systems can maintain pressure within the design range with minimal fluctuations, thus achieving automated operation to a great extent and saving maintenance costs, ensuring long-term stable and safe energy delivery.
Energy cascade utilization with turbomachinery comprehensive solution:
01: Steam pipeline heating and pressure increase
02: Low-grade heat recovery
03: High-pressure gas energy recovery
04: Heat pump distillation energy saving transformation
05: VPSA energy saving and consumption reduction
06: Special centrifugal vacuum pump
