Energy is an important material basis for the survival and development of human beings. The per capita possession of energy, the composition of energy, and the utilization rate of energy are often used as a measure of the degree of modernization and development of a country. With the development of society and the progress of industry, the energy crisis has become a big problem that needs to be solved urgently in the world and is related to the life and death of human beings. Experts estimate that if the structure and speed of energy consumption are not changed and new energy sources are not developed, all energy in the world will be exhausted 200 to 300 years from now. Therefore, effective energy conservation has become one of the cores of global energy research.
As a clean and safe energy carrier, steam is widely used in various industries, such as power generation, petroleum, chemical industry, printing and dyeing, papermaking, textile, brewing, rubber, ceramics, and other industrial fields. After steam releases latent heat of vaporization in various steam-using equipment, it becomes saturated condensed water at nearly the same temperature and pressure. Since the operating pressure of steam is greater than atmospheric pressure, the heat of condensed water can reach 20% of the total heat of steam. 30%, and the higher the pressure and temperature, the more heat the condensate has, and the greater the proportion of the total heat of the steam. It can be seen that recovering the heat of condensed water and using it effectively has great energy-saving potential.
The steam condensate recovery method needs to be selected according to local conditions, which not only makes the system design simple but also eliminates the problems in operation and maintenance from the root cause so that the steam condensate water recovery can be carried out smoothly.
The recovery of condensed water is to recycle and reuse the heat and water volume of steam condensed water. Its benefits can be summarized as follows:
1. Save boiler fuel.
2. Save industrial water. Condensed water can generally be directly used as boiler feed water, which can greatly reduce industrial water consumption. The treated water can still be used effectively.
3. Save the cost of boiler feedwater treatment. Since the condensed water can be directly used for the boiler feed water, the softening treatment cost of this part of the water can be saved.
4. The reduction of fuel combustion can reduce air pollution, and the recovery of heat can reduce the fuel consumption of the boiler, which also reduces the emission of soot and sulfur dioxide. At the same time, the heat generated by the discharge of condensed water is eliminated, and the working environment is improved.
5. Improve the actual thermal efficiency of the boiler. Due to the use of condensed water, the temperature of the boiler feedwater rises, fuel is saved, and the actual thermal efficiency of the boiler is improved, giving full play to the potential of the boiler.