Actually, these “big smokestacks” in power plants are not smokestacks that emit exhaust gases in the way we understand them. Its name is cooling tower. The power plants we usually see today are essentially thermal power plants. When producing thermal power, the unit requires a large amount of cooling water for cooling to ensure smooth power generation. However, without these cooling towers, a large amount of water would be consumed every day for heat dissipation and cooling.
So why do cooling towers emit “smoke”? After cooling the device with cold water. Water vapor is produced when the water in the cooling tower heats up. Another function of the cooling tower is to recycle water without wasting water resources. Thati-it uses the difference in air density inside and outside the cooling tower to form a pressure difference, and then performs ventilation. Most of the water vapor and air cooled to form water droplets and fell into the tank. The water vapor that did not have time to cool escaped from the "big chimney" and formed the "smoke" that we see, which is in reality. It's just water vapor.
So why is it designed like that? Like a big speaker played backwards! In fact, previous power plants also had cooling towers. At the beginning of the design, all shapes were tried, including straight and diamond shapes. I finally settled on this big speaker look. That’s also a lot of factors to take into account. Since power plant cooling towersare usually built at a height of around 160 to 200 meters, this style is the most economical and has a stable structure.
The top is small and the bottom is thick, which can accelerate the flow of Ke Ying and allow the air to discharge as much heat as possible. To make water use more efficient, this "chimney" does not eliminate waste gases, but the fine one next to it does! Do not mistake yourself.
Our thermal power plant does not have a cooling tower in summer and cannot produce electricity. What do we have to do ?
I don't know if you're talking about the smoke from the chimney or the water vapor from the water tower. The water vapor from the thick water tower is harmless, but the smoke from the chimney is harmful. , even if the boiler has dust removal, desulfurization, environmental protection devices such as denitration still emit a very small amount of dust, dsulfur oxides, nitrogen oxides, carbon dioxide and even some heavy metals in the atmosphere. However, the chimneys are very tall, most are 180 meters or 210 meters, and almost none of them reach directly to the ground.
Why does power plant cooling tower water smell bad?
In areas where surface water sources are abundant, cooling towers cooling are not used and open circulating water systems are generally Circulated wastewater Direct discharge.
Your thermal power plant does not have a cooling tower, so it cannot produce electricity in summer? There are many ways: 1. Add a cold water tower, forced air cooling type, covering an area of 50 square meters. 2. Drill two deep wells and use cold groundwater to reduce the temperature of the circulating water. 3. Openir the water circulation.
The cooling water of the power plant includes: 1. Circulating water to cool the condenser. 2. Cooling water bearing for furnace auxiliary machines. 3. Cooling water for the main electrical transformer. 4. Cooling water for turbine oil cooler. 5. Cooling water for thermal sampling. 6. Generator cooling water. 7. Cooling water for generator air cooler
In cooling towerWater is usually gray water or natural water, nitrogen, phosphorus, COD (COD: chemical oxygen demand, indicating the amount of oxygen consumed by chemical oxidants to oxidize the reducing substances in wastewater. In the experiment, this value is the only variable. It is used to indirectly measure the content in reducing pollutants (including organic and inorganic) inthe water. There are some in the middle, which are a little anaerobic or generate H2S. If ammonia smells, it will smell. Microbial methods are not very mature for the treatment of circulating water in power plants, but they are very mature in the treatment of wastewater and reclaimed water. Biological deodorization is also widely used, which involves using certain specific types of microorganisms to eat foods that easily produce odors. .
In theory, this should be achievable if implemented well. It is not so easy for microorganisms to escape again. Generally, there is a fixed bracket or filter, and the cooling tower absolutely does not allow leakage and can still have sterilization measures.