Let me start with the conclusion: it is perfectly acceptable not to drink it directly, but only to use it for indirect heating.
The principle is as follows: in the power plant there is a chemical workshop which takes water from nearby rivers and lakes and then processes it itself (including filtration of impurities, softening , adding chlorine to eliminate microorganisms, etc.), and supplies water to the boiler water circulation system. Water is heated and pressurized in the furnace, reaching ultra-high temperature (without water droplets) and high pressure to form gas. It enters the steam turbine and pushes the blades mounted on the main shaft of the steam turbine, causing the main shaft to move. of the steam turbine to rotate, thereby causing the generator connected to the main shaft of the steam turbine to rotate and produce electricity. In the processabove, in order to fully utilize thermal energy (water is the carrier), "water vapor" (called "hydrophobic" and "exhaust gas") discharged from boilers and steam turbines is collected under pressure in a container. , then routed to other areas of the plant that require heating and continue to use its thermal energy. For example, use it to boil water, steam rice and wash dishes in canteens, heat bathrooms, or even use it as a water heater in the workplace, to heat water for fish farming, etc. There are also "steamers" installed in locations where workers cannot leave their stations while working to facilitate cooking food, and they are also a source of steam.
Is there pollution in thermal power plants?
The main task of chemical water is to remove impuritiess and impurities present in the water after raw water treatment (river water, tap water, etc.) Metal ions, suspended matter, etc., the treated demineralized water is sent to the boilers or desuperheaters and other equipment for use;
Another task of chemical water is monitoring water quality, superheated steam, saturated steam, The water in the drum is regularly sampled and tested, and if it does not meet standards, chemicals must be added to the boiler;
Sometimes the water chemistry station assumes part of the laboratory functions, testing major materials power plant auxiliaries, such as test lime for desulfurization, raw coal quality testing (calorific value, ash content, humidity, volatile matter, sulfur content, etc.
If the power plant); has a wastewater treatment plant, it must alsot undertake wastewater treatment tasks, such as understanding sewage sedimentation, regulating CASS tank aeration, settling tank, sludge removal with filter, etc.
The thermal power plant is polluted. Due to their operating principle, thermal power plants produce significant emissions such as “noise, waste water, waste gases and waste residues”. These emissions include dust particles, ash and flue gases emitted during the fuel combustion process, sewage and waste; liquid, and the noise emitted during the operation of the unit. For this reason, it will bring some pollution to the environment. Thermal power plant refers to a thermal power plant that not only produces electricity, but also uses the extraction steam or exhaust steam from the steam turbine to provide power.to users. The main working principle is to use the hot water generated by the thermal power plant to heat it again and then provide heating. Due to objective facts, it is impossible for thermal power plants to “bid for grid access” on the same starting line as large power plants. The installed capacity of thermal power plants is limited by the size and nature of the thermal load, and the scale of the units is much smaller than that of the main units of thermal power plants. Since thermal power plants produce both electricity and heat, their boiler capacity is greater than that of thermal power plants of the same size. Thermal power plants need to have larger backup boiler capacity than ordinary thermal power plants, and the water treatment capacity is also larger. Thermal power plantsThey must be close to thermal load centers, which are often urban centers located in densely populated areas. Their requirements for water consumption, land acquisition, demolition and environmental protection are all much higher than others. A thermal power plant of the same capacity will also be built with a thermal pipeline network.