Petroleum, chemical plant power network renovation
With the rapid development of modern industry, the demand for energy efficiency is becoming greater and greater. High temperature and high pressure steam is the main power source for the power and chemical industry and operating parameters are gradually increasing. However, for decades our high pressure pipelines have been using only the natural compensation method, with mostly imported materials. Taking the 10Mpa/550C above pipeline for example, basically every 20m needs a rectangular compensation. It is not only a large waste of pipe with great pressure and temperature loss, but also does not meet the national “Energy conservation and emissions reduction" policy. As the third generation of Hongxin Group, the rotary compensator product SZQ-ZQ self-sealing rotary compensator is able to solve this problem perfectly. A rotary compensator every a few hundred meters, can absorb the thermal expansion of the whole pipeline. This reduces pipeline extension, saves a lot of elbows, reduces pipe pressure loss and heat dissipation, and also reduces of the number of fixed bracket and sliding bearings. Most importantly, the use of a rotating compensator completely releases pipe stress, so we can use cheaper domestic materials instead of the original P91 imported materials to meet stress requirements. This could save nearly 10 million in just 1 km DN500 pipeline. Moreover, the use of a rotary compensator makes the pressure loss smaller, so a DN400 diameter pipeline is enough to meet the pressure requirements. This can reduce nearly 1 /3 of the investment, plus other savings on elbows , insulation , protection , construction , steel , etc. . We calculated that using rotary compensator technology can save nearly 45% on investment than conventional natural compensation.
Classic case: CNOOC Huizhou branch pipe network renovation project
Power plant long distance heating energy-saving renovation
Energy prices are rising and there are more requirements for reduced power plant emissions. Eliminating small generators and renovating large generators for better heating improves energy utilization efficiency and reduces environment pollution. A large condenser is designed according to the condensing operation mode, so there is no better steam extraction method suitable for industry and life. If you want heating, you must renovate.
Basically, there are three kinds of methods to renovate large condensers into heating generators:
1. Change all the turbine rotors and cylinders and change the condenser into a heating unit. This can achieve reasonable parameters for heating, but this kind of renovation is expensive and costs as much as buying brand new condensers.
2. Tapping and Pumping the steam turbine, the high and middle pressure cylinder, and on the middle and low pressure pipe to renovate large condensers into heating generators.
3. Renovating a large condenser unit into a heating unit by mixing high pressure of steam supply and low pressure with the pressure verifier (steam ejector), to satisfy the requirements for steam supply pressure.
A classic case: Energy saving renovation project of Zhenjiang Dagang power plant.
