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Application of graphite heat exchanger in plume de-whitening process
Release time:
2022-06-24
In the process of chemical plant processing, a wide variety of thermal equipment is used. Selecting different thermal equipment according to different processing standards is an important part of ensuring the quality of the project and the economic benefits of project investment.
I. Introduction of smoke plume whitening technology.
According to the basic induced principle of the smoke plume state, combined with the actual production, the rectification method can be divided into three categories: smoke heating technology, smoke cold suspected technology and smoke cold suspected reheating technology.
1. Smoke heating technology.
Heating technology is to enter the chimney before the wet saturated state of heating, increase the temperature of wet smoke, keep the relative humidity of wet smoke unchanged, reduce the relative humidity, so that the humidity of the flue gas air is lower than the saturated humidity of the heated, and then more than the removal of smoke plume of the technical standards.
2. Smoke cold skepticism technology.
Cold smoke technology is to cool down the wet saturated state in front of the chimney channel, reduce the temperature of the wet smoke, greatly reduce the humidity of the entire cooling process, reduce the relative humidity of the wet smoke.
3. Smoke cold suspected reheating technology.
Smoke cold suspected and reheating technology is the composition and application of two methods, also known as two drops and a liter. The current environmental protection program is far more cost-effective investment than the first two technologies. The principle of removing the wet soot plume is based on the cooling to reduce the relative water content of the wet soot, so that the saturated water vapor in the soot is dissolved into condensate, and then the soot is heated to reduce the relative water content of the wet soot so as to remove the plume.
Second, combined with the advantages of graphite heat exchanger, details of its practical applications.
1. In the process of chemical plant processing, a wide variety of thermal equipment is used. According to different processing standards to choose different thermal equipment, is to ensure the quality of the project and the economic benefits of project investment is an important link. As we all know, the characteristics of the graphite heat exchanger section of the plume whitening process of long-term soot is the temperature of the exhaust system of wet soot, cooked gypsum slurry, carbon dioxide, sulfur metal oxides, nitrogen oxides, water vapor. When the operating temperature and the actual demisting effect is weak, the chimney rain will occur, not conducive to the rise and diffusion of soot, and even aggravate some of the hazards of acid rain, erosion of engineering equipment and buildings. For this factor, the material of flue gas cooling tower, flue gas cooler and flue gas reheater is high purity graphite heat exchanger, which is a good choice of heat exchanger material.
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